diff options
66 files changed, 4848 insertions, 2085 deletions
diff --git a/drivers/mtd/Kconfig b/drivers/mtd/Kconfig index 8848e8ac705d..e8503341e3b1 100644 --- a/drivers/mtd/Kconfig +++ b/drivers/mtd/Kconfig @@ -150,6 +150,14 @@ config MTD_AFS_PARTS for your particular device. It won't happen automatically. The 'armflash' map driver (CONFIG_MTD_ARMFLASH) does this, for example. +config MTD_OF_PARTS + tristate "Flash partition map based on OF description" + depends on PPC_OF && MTD_PARTITIONS + help + This provides a partition parsing function which derives + the partition map from the children of the flash node, + as described in Documentation/powerpc/booting-without-of.txt. + comment "User Modules And Translation Layers" config MTD_CHAR @@ -286,6 +294,9 @@ config MTD_OOPS buffer in a flash partition where it can be read back at some later point. + To use, add console=ttyMTDx to the kernel command line, + where x is the MTD device number to use. + source "drivers/mtd/chips/Kconfig" source "drivers/mtd/maps/Kconfig" diff --git a/drivers/mtd/Makefile b/drivers/mtd/Makefile index 7f0b04b4caa7..538e33d11d46 100644 --- a/drivers/mtd/Makefile +++ b/drivers/mtd/Makefile @@ -11,6 +11,7 @@ obj-$(CONFIG_MTD_CONCAT) += mtdconcat.o obj-$(CONFIG_MTD_REDBOOT_PARTS) += redboot.o obj-$(CONFIG_MTD_CMDLINE_PARTS) += cmdlinepart.o obj-$(CONFIG_MTD_AFS_PARTS) += afs.o +obj-$(CONFIG_MTD_OF_PARTS) += ofpart.o # 'Users' - code which presents functionality to userspace. obj-$(CONFIG_MTD_CHAR) += mtdchar.o diff --git a/drivers/mtd/chips/cfi_cmdset_0001.c b/drivers/mtd/chips/cfi_cmdset_0001.c index 1707f98c322c..47794d23a42e 100644 --- a/drivers/mtd/chips/cfi_cmdset_0001.c +++ b/drivers/mtd/chips/cfi_cmdset_0001.c @@ -50,6 +50,7 @@ #define I82802AC 0x00ac #define MANUFACTURER_ST 0x0020 #define M50LPW080 0x002F +#define AT49BV640D 0x02de static int cfi_intelext_read (struct mtd_info *, loff_t, size_t, size_t *, u_char *); static int cfi_intelext_write_words(struct mtd_info *, loff_t, size_t, size_t *, const u_char *); @@ -157,6 +158,47 @@ static void cfi_tell_features(struct cfi_pri_intelext *extp) } #endif +/* Atmel chips don't use the same PRI format as Intel chips */ +static void fixup_convert_atmel_pri(struct mtd_info *mtd, void *param) +{ + struct map_info *map = mtd->priv; + struct cfi_private *cfi = map->fldrv_priv; + struct cfi_pri_intelext *extp = cfi->cmdset_priv; + struct cfi_pri_atmel atmel_pri; + uint32_t features = 0; + + /* Reverse byteswapping */ + extp->FeatureSupport = cpu_to_le32(extp->FeatureSupport); + extp->BlkStatusRegMask = cpu_to_le16(extp->BlkStatusRegMask); + extp->ProtRegAddr = cpu_to_le16(extp->ProtRegAddr); + + memcpy(&atmel_pri, extp, sizeof(atmel_pri)); + memset((char *)extp + 5, 0, sizeof(*extp) - 5); + + printk(KERN_ERR "atmel Features: %02x\n", atmel_pri.Features); + + if (atmel_pri.Features & 0x01) /* chip erase supported */ + features |= (1<<0); + if (atmel_pri.Features & 0x02) /* erase suspend supported */ + features |= (1<<1); + if (atmel_pri.Features & 0x04) /* program suspend supported */ + features |= (1<<2); + if (atmel_pri.Features & 0x08) /* simultaneous operations supported */ + features |= (1<<9); + if (atmel_pri.Features & 0x20) /* page mode read supported */ + features |= (1<<7); + if (atmel_pri.Features & 0x40) /* queued erase supported */ + features |= (1<<4); + if (atmel_pri.Features & 0x80) /* Protection bits supported */ + features |= (1<<6); + + extp->FeatureSupport = features; + + /* burst write mode not supported */ + cfi->cfiq->BufWriteTimeoutTyp = 0; + cfi->cfiq->BufWriteTimeoutMax = 0; +} + #ifdef CMDSET0001_DISABLE_ERASE_SUSPEND_ON_WRITE /* Some Intel Strata Flash prior to FPO revision C has bugs in this area */ static void fixup_intel_strataflash(struct mtd_info *mtd, void* param) @@ -227,13 +269,20 @@ static void fixup_use_write_buffers(struct mtd_info *mtd, void *param) /* * Some chips power-up with all sectors locked by default. */ -static void fixup_use_powerup_lock(struct mtd_info *mtd, void *param) +static void fixup_unlock_powerup_lock(struct mtd_info *mtd, void *param) { - printk(KERN_INFO "Using auto-unlock on power-up/resume\n" ); - mtd->flags |= MTD_STUPID_LOCK; + struct map_info *map = mtd->priv; + struct cfi_private *cfi = map->fldrv_priv; + struct cfi_pri_intelext *cfip = cfi->cmdset_priv; + + if (cfip->FeatureSupport&32) { + printk(KERN_INFO "Using auto-unlock on power-up/resume\n" ); + mtd->flags |= MTD_POWERUP_LOCK; + } } static struct cfi_fixup cfi_fixup_table[] = { + { CFI_MFR_ATMEL, CFI_ID_ANY, fixup_convert_atmel_pri, NULL }, #ifdef CMDSET0001_DISABLE_ERASE_SUSPEND_ON_WRITE { CFI_MFR_ANY, CFI_ID_ANY, fixup_intel_strataflash, NULL }, #endif @@ -245,7 +294,7 @@ static struct cfi_fixup cfi_fixup_table[] = { #endif { CFI_MFR_ST, 0x00ba, /* M28W320CT */ fixup_st_m28w320ct, NULL }, { CFI_MFR_ST, 0x00bb, /* M28W320CB */ fixup_st_m28w320cb, NULL }, - { MANUFACTURER_INTEL, 0x891c, fixup_use_powerup_lock, NULL, }, + { MANUFACTURER_INTEL, CFI_ID_ANY, fixup_unlock_powerup_lock, NULL, }, { 0, 0, NULL, NULL } }; @@ -277,7 +326,7 @@ read_pri_intelext(struct map_info *map, __u16 adr) return NULL; if (extp->MajorVersion != '1' || - (extp->MinorVersion < '0' || extp->MinorVersion > '4')) { + (extp->MinorVersion < '0' || extp->MinorVersion > '5')) { printk(KERN_ERR " Unknown Intel/Sharp Extended Query " "version %c.%c.\n", extp->MajorVersion, extp->MinorVersion); @@ -752,6 +801,7 @@ static int chip_ready (struct map_info *map, struct flchip *chip, unsigned long static int get_chip(struct map_info *map, struct flchip *chip, unsigned long adr, int mode) { int ret; + DECLARE_WAITQUEUE(wait, current); retry: if (chip->priv && (mode == FL_WRITING || mode == FL_ERASING @@ -808,6 +858,20 @@ static int get_chip(struct map_info *map, struct flchip *chip, unsigned long adr spin_unlock(contender->mutex); } + /* Check if we already have suspended erase + * on this chip. Sleep. */ + if (mode == FL_ERASING && shared->erasing + && shared->erasing->oldstate == FL_ERASING) { + spin_unlock(&shared->lock); + set_current_state(TASK_UNINTERRUPTIBLE); + add_wait_queue(&chip->wq, &wait); + spin_unlock(chip->mutex); + schedule(); + remove_wait_queue(&chip->wq, &wait); + spin_lock(chip->mutex); + goto retry; + } + /* We now own it */ shared->writing = chip; if (mode == FL_ERASING) @@ -2294,7 +2358,7 @@ static int cfi_intelext_suspend(struct mtd_info *mtd) struct flchip *chip; int ret = 0; - if ((mtd->flags & MTD_STUPID_LOCK) + if ((mtd->flags & MTD_POWERUP_LOCK) && extp && (extp->FeatureSupport & (1 << 5))) cfi_intelext_save_locks(mtd); @@ -2405,7 +2469,7 @@ static void cfi_intelext_resume(struct mtd_info *mtd) spin_unlock(chip->mutex); } - if ((mtd->flags & MTD_STUPID_LOCK) + if ((mtd->flags & MTD_POWERUP_LOCK) && extp && (extp->FeatureSupport & (1 << 5))) cfi_intelext_restore_locks(mtd); } diff --git a/drivers/mtd/chips/cfi_cmdset_0002.c b/drivers/mtd/chips/cfi_cmdset_0002.c index 389acc600f5e..d072e87ce4e2 100644 --- a/drivers/mtd/chips/cfi_cmdset_0002.c +++ b/drivers/mtd/chips/cfi_cmdset_0002.c @@ -185,6 +185,10 @@ static void fixup_convert_atmel_pri(struct mtd_info *mtd, void *param) extp->TopBottom = 2; else extp->TopBottom = 3; + + /* burst write mode not supported */ + cfi->cfiq->BufWriteTimeoutTyp = 0; + cfi->cfiq->BufWriteTimeoutMax = 0; } static void fixup_use_secsi(struct mtd_info *mtd, void *param) @@ -213,10 +217,11 @@ static void fixup_use_atmel_lock(struct mtd_info *mtd, void *param) { mtd->lock = cfi_atmel_lock; mtd->unlock = cfi_atmel_unlock; - mtd->flags |= MTD_STUPID_LOCK; + mtd->flags |= MTD_POWERUP_LOCK; } static struct cfi_fixup cfi_fixup_table[] = { + { CFI_MFR_ATMEL, CFI_ID_ANY, fixup_convert_atmel_pri, NULL }, #ifdef AMD_BOOTLOC_BUG { CFI_MFR_AMD, CFI_ID_ANY, fixup_amd_bootblock, NULL }, #endif @@ -229,7 +234,6 @@ static struct cfi_fixup cfi_fixup_table[] = { #if !FORCE_WORD_WRITE { CFI_MFR_ANY, CFI_ID_ANY, fixup_use_write_buffers, NULL, }, #endif - { CFI_MFR_ATMEL, CFI_ID_ANY, fixup_convert_atmel_pri, NULL }, { 0, 0, NULL, NULL } }; static struct cfi_fixup jedec_fixup_table[] = { @@ -338,10 +342,12 @@ struct mtd_info *cfi_cmdset_0002(struct map_info *map, int primary) /* Modify the unlock address if we are in compatibility mode */ if ( /* x16 in x8 mode */ ((cfi->device_type == CFI_DEVICETYPE_X8) && - (cfi->cfiq->InterfaceDesc == 2)) || + (cfi->cfiq->InterfaceDesc == + CFI_INTERFACE_X8_BY_X16_ASYNC)) || /* x32 in x16 mode */ ((cfi->device_type == CFI_DEVICETYPE_X16) && - (cfi->cfiq->InterfaceDesc == 4))) + (cfi->cfiq->InterfaceDesc == + CFI_INTERFACE_X16_BY_X32_ASYNC))) { cfi->addr_unlock1 = 0xaaa; cfi->addr_unlock2 = 0x555; diff --git a/drivers/mtd/chips/cfi_probe.c b/drivers/mtd/chips/cfi_probe.c index 60e11a0ada97..f651b6ef1c5d 100644 --- a/drivers/mtd/chips/cfi_probe.c +++ b/drivers/mtd/chips/cfi_probe.c @@ -370,27 +370,27 @@ static void print_cfi_ident(struct cfi_ident *cfip) printk("Device size: 0x%X bytes (%d MiB)\n", 1 << cfip->DevSize, 1<< (cfip->DevSize - 20)); printk("Flash Device Interface description: 0x%4.4X\n", cfip->InterfaceDesc); switch(cfip->InterfaceDesc) { - case 0: + case CFI_INTERFACE_X8_ASYNC: printk(" - x8-only asynchronous interface\n"); break; - case 1: + case CFI_INTERFACE_X16_ASYNC: printk(" - x16-only asynchronous interface\n"); break; - case 2: + case CFI_INTERFACE_X8_BY_X16_ASYNC: printk(" - supports x8 and x16 via BYTE# with asynchronous interface\n"); break; - case 3: + case CFI_INTERFACE_X32_ASYNC: printk(" - x32-only asynchronous interface\n"); break; - case 4: + case CFI_INTERFACE_X16_BY_X32_ASYNC: printk(" - supports x16 and x32 via Word# with asynchronous interface\n"); break; - case 65535: + case CFI_INTERFACE_NOT_ALLOWED: printk(" - Not Allowed / Reserved\n"); break; diff --git a/drivers/mtd/chips/gen_probe.c b/drivers/mtd/chips/gen_probe.c index 2eb696d7b97b..d338b8c92780 100644 --- a/drivers/mtd/chips/gen_probe.c +++ b/drivers/mtd/chips/gen_probe.c @@ -112,7 +112,7 @@ static struct cfi_private *genprobe_ident_chips(struct map_info *map, struct chi max_chips = 1; } - mapsize = (max_chips + BITS_PER_LONG-1) / BITS_PER_LONG; + mapsize = sizeof(long) * ( (max_chips + BITS_PER_LONG-1) / BITS_PER_LONG ); chip_map = kzalloc(mapsize, GFP_KERNEL); if (!chip_map) { printk(KERN_WARNING "%s: kmalloc failed for CFI chip map\n", map->name); diff --git a/drivers/mtd/chips/jedec_probe.c b/drivers/mtd/chips/jedec_probe.c index a67b23b87fc0..4be51a86a85c 100644 --- a/drivers/mtd/chips/jedec_probe.c +++ b/drivers/mtd/chips/jedec_probe.c @@ -194,8 +194,8 @@ enum uaddr { struct unlock_addr { - u32 addr1; - u32 addr2; + uint32_t addr1; + uint32_t addr2; }; @@ -246,16 +246,16 @@ static const struct unlock_addr unlock_addrs[] = { } }; - struct amd_flash_info { - const __u16 mfr_id; - const __u16 dev_id; const char *name; - const int DevSize; - const int NumEraseRegions; - const int CmdSet; - const __u8 uaddr[4]; /* unlock addrs for 8, 16, 32, 64 */ - const ulong regions[6]; + const uint16_t mfr_id; + const uint16_t dev_id; + const uint8_t dev_size; + const uint8_t nr_regions; + const uint16_t cmd_set; + const uint32_t regions[6]; + const uint8_t devtypes; /* Bitmask for x8, x16 etc. */ + const uint8_t uaddr; /* unlock addrs for 8, 16, 32, 64 */ }; #define ERASEINFO(size,blocks) (size<<8)|(blocks-1) @@ -280,12 +280,11 @@ static const struct amd_flash_info jedec_table[] = { .mfr_id = MANUFACTURER_AMD, .dev_id = AM29F032B, .name = "AMD AM29F032B", - .uaddr = { - [0] = MTD_UADDR_0x0555_0x02AA /* x8 */ - }, - .DevSize = SIZE_4MiB, - .CmdSet = P_ID_AMD_STD, - .NumEraseRegions= 1, + .uaddr = MTD_UADDR_0x0555_0x02AA, + .devtypes = CFI_DEVICETYPE_X8, + .dev_size = SIZE_4MiB, + .cmd_set = P_ID_AMD_STD, + .nr_regions = 1, .regions = { ERASEINFO(0x10000,64) } @@ -293,13 +292,11 @@ static const struct amd_flash_info jedec_table[] = { .mfr_id = MANUFACTURER_AMD, .dev_id = AM29LV160DT, .name = "AMD AM29LV160DT", - .uaddr = { - [0] = MTD_UADDR_0x0AAA_0x0555, /* x8 */ - [1] = MTD_UADDR_0x0555_0x02AA /* x16 */ - }, - .DevSize = SIZE_2MiB, - .CmdSet = P_ID_AMD_STD, - .NumEraseRegions= 4, + .devtypes = CFI_DEVICETYPE_X16|CFI_DEVICETYPE_X8, + .uaddr = MTD_UADDR_0x0AAA_0x0555, + .dev_size = SIZE_2MiB, + .cmd_set = P_ID_AMD_STD, + .nr_regions = 4, .regions = { ERASEINFO(0x10000,31), ERASEINFO(0x08000,1), @@ -310,13 +307,11 @@ static const struct amd_flash_info jedec_table[] = { .mfr_id = MANUFACTURER_AMD, .dev_id = AM29LV160DB, .name = "AMD AM29LV160DB", - .uaddr = { - [0] = MTD_UADDR_0x0AAA_0x0555, /* x8 */ - [1] = MTD_UADDR_0x0555_0x02AA /* x16 */ - }, - .DevSize = SIZE_2MiB, - .CmdSet = P_ID_AMD_STD, - .NumEraseRegions= 4, + .devtypes = CFI_DEVICETYPE_X16|CFI_DEVICETYPE_X8, + .uaddr = MTD_UADDR_0x0AAA_0x0555, + .dev_size = SIZE_2MiB, + .cmd_set = P_ID_AMD_STD, + .nr_regions = 4, .regions = { ERASEINFO(0x04000,1), ERASEINFO(0x02000,2), @@ -327,13 +322,11 @@ static const struct amd_flash_info jedec_table[] = { .mfr_id = MANUFACTURER_AMD, .dev_id = AM29LV400BB, .name = "AMD AM29LV400BB", - .uaddr = { - [0] = MTD_UADDR_0x0AAA_0x0555, /* x8 */ - [1] = MTD_UADDR_0x0555_0x02AA, /* x16 */ - }, - .DevSize = SIZE_512KiB, - .CmdSet = P_ID_AMD_STD, - .NumEraseRegions= 4, + .devtypes = CFI_DEVICETYPE_X16|CFI_DEVICETYPE_X8, + .uaddr = MTD_UADDR_0x0AAA_0x0555, + .dev_size = SIZE_512KiB, + .cmd_set = P_ID_AMD_STD, + .nr_regions = 4, .regions = { ERASEINFO(0x04000,1), ERASEINFO(0x02000,2), @@ -344,13 +337,11 @@ static const struct amd_flash_info jedec_table[] = { .mfr_id = MANUFACTURER_AMD, .dev_id = AM29LV400BT, .name = "AMD AM29LV400BT", - .uaddr = { - [0] = MTD_UADDR_0x0AAA_0x0555, /* x8 */ - [1] = MTD_UADDR_0x0555_0x02AA, /* x16 */ - }, - .DevSize = SIZE_512KiB, - .CmdSet = P_ID_AMD_STD, - .NumEraseRegions= 4, + .devtypes = CFI_DEVICETYPE_X16|CFI_DEVICETYPE_X8, + .uaddr = MTD_UADDR_0x0AAA_0x0555, + .dev_size = SIZE_512KiB, + .cmd_set = P_ID_AMD_STD, + .nr_regions = 4, .regions = { ERASEINFO(0x10000,7), ERASEINFO(0x08000,1), @@ -361,13 +352,11 @@ static const struct amd_flash_info jedec_table[] = { .mfr_id = MANUFACTURER_AMD, .dev_id = AM29LV800BB, .name = "AMD AM29LV800BB", - .uaddr = { - [0] = MTD_UADDR_0x0AAA_0x0555, /* x8 */ - [1] = MTD_UADDR_0x0555_0x02AA, /* x16 */ - }, - .DevSize = SIZE_1MiB, - .CmdSet = P_ID_AMD_STD, - .NumEraseRegions= 4, + .devtypes = CFI_DEVICETYPE_X16|CFI_DEVICETYPE_X8, + .uaddr = MTD_UADDR_0x0AAA_0x0555, + .dev_size = SIZE_1MiB, + .cmd_set = P_ID_AMD_STD, + .nr_regions = 4, .regions = { ERASEINFO(0x04000,1), ERASEINFO(0x02000,2), @@ -379,13 +368,11 @@ static const struct amd_flash_info jedec_table[] = { .mfr_id = MANUFACTURER_AMD, .dev_id = AM29DL800BB, .name = "AMD AM29DL800BB", - .uaddr = { - [0] = MTD_UADDR_0x0AAA_0x0555, /* x8 */ - [1] = MTD_UADDR_0x0555_0x02AA, /* x16 */ - }, - .DevSize = SIZE_1MiB, - .CmdSet = P_ID_AMD_STD, - .NumEraseRegions= 6, + .devtypes = CFI_DEVICETYPE_X16|CFI_DEVICETYPE_X8, + .uaddr = MTD_UADDR_0x0AAA_0x0555, + .dev_size = SIZE_1MiB, + .cmd_set = P_ID_AMD_STD, + .nr_regions = 6, .regions = { ERASEINFO(0x04000,1), ERASEINFO(0x08000,1), @@ -398,13 +385,11 @@ static const struct amd_flash_info jedec_table[] = { .mfr_id = MANUFACTURER_AMD, .dev_id = AM29DL800BT, .name = "AMD AM29DL800BT", - .uaddr = { - [0] = MTD_UADDR_0x0AAA_0x0555, /* x8 */ - [1] = MTD_UADDR_0x0555_0x02AA, /* x16 */ - }, - .DevSize = SIZE_1MiB, - .CmdSet = P_ID_AMD_STD, - .NumEraseRegions= 6, + .devtypes = CFI_DEVICETYPE_X16|CFI_DEVICETYPE_X8, + .uaddr = MTD_UADDR_0x0AAA_0x0555, + .dev_size = SIZE_1MiB, + .cmd_set = P_ID_AMD_STD, + .nr_regions = 6, .regions = { ERASEINFO(0x10000,14), ERASEINFO(0x04000,1), @@ -417,13 +402,11 @@ static const struct amd_flash_info jedec_table[] = { .mfr_id = MANUFACTURER_AMD, .dev_id = AM29F800BB, .name = "AMD AM29F800BB", - .uaddr = { - [0] = MTD_UADDR_0x0AAA_0x0555, /* x8 */ - [1] = MTD_UADDR_0x0555_0x02AA, /* x16 */ - }, - .DevSize = SIZE_1MiB, - .CmdSet = P_ID_AMD_STD, - .NumEraseRegions= 4, + .devtypes = CFI_DEVICETYPE_X16|CFI_DEVICETYPE_X8, + .uaddr = MTD_UADDR_0x0AAA_0x0555, + .dev_size = SIZE_1MiB, + .cmd_set = P_ID_AMD_STD, + .nr_regions = 4, .regions = { ERASEINFO(0x04000,1), ERASEINFO(0x02000,2), @@ -434,13 +417,11 @@ static const struct amd_flash_info jedec_table[] = { .mfr_id = MANUFACTURER_AMD, .dev_id = AM29LV800BT, .name = "AMD AM29LV800BT", - .uaddr = { - [0] = MTD_UADDR_0x0AAA_0x0555, /* x8 */ - [1] = MTD_UADDR_0x0555_0x02AA, /* x16 */ - }, - .DevSize = SIZE_1MiB, - .CmdSet = P_ID_AMD_STD, - .NumEraseRegions= 4, + .devtypes = CFI_DEVICETYPE_X16|CFI_DEVICETYPE_X8, + .uaddr = MTD_UADDR_0x0AAA_0x0555, + .dev_size = SIZE_1MiB, + .cmd_set = P_ID_AMD_STD, + .nr_regions = 4, .regions = { ERASEINFO(0x10000,15), ERASEINFO(0x08000,1), @@ -451,13 +432,11 @@ static const struct amd_flash_info jedec_table[] = { .mfr_id = MANUFACTURER_AMD, .dev_id = AM29F800BT, .name = "AMD AM29F800BT", - .uaddr = { - [0] = MTD_UADDR_0x0AAA_0x0555, /* x8 */ - [1] = MTD_UADDR_0x0555_0x02AA, /* x16 */ - }, - .DevSize = SIZE_1MiB, - .CmdSet = P_ID_AMD_STD, - .NumEraseRegions= 4, + .devtypes = CFI_DEVICETYPE_X16|CFI_DEVICETYPE_X8, + .uaddr = MTD_UADDR_0x0AAA_0x0555, + .dev_size = SIZE_1MiB, + .cmd_set = P_ID_AMD_STD, + .nr_regions = 4, .regions = { ERASEINFO(0x10000,15), ERASEINFO(0x08000,1), @@ -468,12 +447,11 @@ static const struct amd_flash_info jedec_table[] = { .mfr_id = MANUFACTURER_AMD, .dev_id = AM29F017D, .name = "AMD AM29F017D", - .uaddr = { - [0] = MTD_UADDR_DONT_CARE /* x8 */ - }, - .DevSize = SIZE_2MiB, - .CmdSet = P_ID_AMD_STD, - .NumEraseRegions= 1, + .devtypes = CFI_DEVICETYPE_X8, + .uaddr = MTD_UADDR_DONT_CARE, + .dev_size = SIZE_2MiB, + .cmd_set = P_ID_AMD_STD, + .nr_regions = 1, .regions = { ERASEINFO(0x10000,32), } @@ -481,12 +459,11 @@ static const struct amd_flash_info jedec_table[] = { .mfr_id = MANUFACTURER_AMD, .dev_id = AM29F016D, .name = "AMD AM29F016D", - .uaddr = { - [0] = MTD_UADDR_0x0555_0x02AA /* x8 */ - }, - .DevSize = SIZE_2MiB, - .CmdSet = P_ID_AMD_STD, - .NumEraseRegions= 1, + .devtypes = CFI_DEVICETYPE_X8, + .uaddr = MTD_UADDR_0x0555_0x02AA, + .dev_size = SIZE_2MiB, + .cmd_set = P_ID_AMD_STD, + .nr_regions = 1, .regions = { ERASEINFO(0x10000,32), } @@ -494,12 +471,11 @@ static const struct amd_flash_info jedec_table[] = { .mfr_id = MANUFACTURER_AMD, .dev_id = AM29F080, .name = "AMD AM29F080", - .uaddr = { - [0] = MTD_UADDR_0x0555_0x02AA /* x8 */ - }, - .DevSize = SIZE_1MiB, - .CmdSet = P_ID_AMD_STD, - .NumEraseRegions= 1, + .devtypes = CFI_DEVICETYPE_X8, + .uaddr = MTD_UADDR_0x0555_0x02AA, + .dev_size = SIZE_1MiB, + .cmd_set = P_ID_AMD_STD, + .nr_regions = 1, .regions = { ERASEINFO(0x10000,16), } @@ -507,12 +483,11 @@ static const struct amd_flash_info jedec_table[] = { .mfr_id = MANUFACTURER_AMD, .dev_id = AM29F040, .name = "AMD AM29F040", - .uaddr = { - [0] = MTD_UADDR_0x0555_0x02AA /* x8 */ - }, - .DevSize = SIZE_512KiB, - .CmdSet = P_ID_AMD_STD, - .NumEraseRegions= 1, + .devtypes = CFI_DEVICETYPE_X8, + .uaddr = MTD_UADDR_0x0555_0x02AA, + .dev_size = SIZE_512KiB, + .cmd_set = P_ID_AMD_STD, + .nr_regions = 1, .regions = { ERASEINFO(0x10000,8), } @@ -520,12 +495,11 @@ static const struct amd_flash_info jedec_table[] = { .mfr_id = MANUFACTURER_AMD, .dev_id = AM29LV040B, .name = "AMD AM29LV040B", - .uaddr = { - [0] = MTD_UADDR_0x0555_0x02AA /* x8 */ - }, - .DevSize = SIZE_512KiB, - .CmdSet = P_ID_AMD_STD, - .NumEraseRegions= 1, + .devtypes = CFI_DEVICETYPE_X8, + .uaddr = MTD_UADDR_0x0555_0x02AA, + .dev_size = SIZE_512KiB, + .cmd_set = P_ID_AMD_STD, + .nr_regions = 1, .regions = { ERASEINFO(0x10000,8), } @@ -533,12 +507,11 @@ static const struct amd_flash_info jedec_table[] = { .mfr_id = MANUFACTURER_AMD, .dev_id = AM29F002T, .name = "AMD AM29F002T", - .uaddr = { - [0] = MTD_UADDR_0x0555_0x02AA /* x8 */ - }, - .DevSize = SIZE_256KiB, - .CmdSet = P_ID_AMD_STD, - .NumEraseRegions= 4, + .devtypes = CFI_DEVICETYPE_X8, + .uaddr = MTD_UADDR_0x0555_0x02AA, + .dev_size = SIZE_256KiB, + .cmd_set = P_ID_AMD_STD, + .nr_regions = 4, .regions = { ERASEINFO(0x10000,3), ERASEINFO(0x08000,1), @@ -549,12 +522,11 @@ static const struct amd_flash_info jedec_table[] = { .mfr_id = MANUFACTURER_ATMEL, .dev_id = AT49BV512, .name = "Atmel AT49BV512", - .uaddr = { - [0] = MTD_UADDR_0x5555_0x2AAA /* x8 */ - }, - .DevSize = SIZE_64KiB, - .CmdSet = P_ID_AMD_STD, - .NumEraseRegions= 1, + .devtypes = CFI_DEVICETYPE_X8, + .uaddr = MTD_UADDR_0x5555_0x2AAA, + .dev_size = SIZE_64KiB, + .cmd_set = P_ID_AMD_STD, + .nr_regions = 1, .regions = { ERASEINFO(0x10000,1) } @@ -562,12 +534,11 @@ static const struct amd_flash_info jedec_table[] = { .mfr_id = MANUFACTURER_ATMEL, .dev_id = AT29LV512, .name = "Atmel AT29LV512", - .uaddr = { - [0] = MTD_UADDR_0x5555_0x2AAA /* x8 */ - }, - .DevSize = SIZE_64KiB, - .CmdSet = P_ID_AMD_STD, - .NumEraseRegions= 1, + .devtypes = CFI_DEVICETYPE_X8, + .uaddr = MTD_UADDR_0x5555_0x2AAA, + .dev_size = SIZE_64KiB, + .cmd_set = P_ID_AMD_STD, + .nr_regions = 1, .regions = { ERASEINFO(0x80,256), ERASEINFO(0x80,256) @@ -576,13 +547,11 @@ static const struct amd_flash_info jedec_table[] = { .mfr_id = MANUFACTURER_ATMEL, .dev_id = AT49BV16X, .name = "Atmel AT49BV16X", - .uaddr = { - [0] = MTD_UADDR_0x0555_0x0AAA, /* x8 */ - [1] = MTD_UADDR_0x0555_0x0AAA /* x16 */ - }, - .DevSize = SIZE_2MiB, - .CmdSet = P_ID_AMD_STD, - .NumEraseRegions= 2, + .devtypes = CFI_DEVICETYPE_X16|CFI_DEVICETYPE_X8, + .uaddr = MTD_UADDR_0x0555_0x0AAA, /* ???? */ + .dev_size = SIZE_2MiB, + .cmd_set = P_ID_AMD_STD, + .nr_regions = 2, .regions = { ERASEINFO(0x02000,8), ERASEINFO(0x10000,31) @@ -591,13 +560,11 @@ static const struct amd_flash_info jedec_table[] = { .mfr_id = MANUFACTURER_ATMEL, .dev_id = AT49BV16XT, .name = "Atmel AT49BV16XT", - .uaddr = { - [0] = MTD_UADDR_0x0555_0x0AAA, /* x8 */ - [1] = MTD_UADDR_0x0555_0x0AAA /* x16 */ - }, - .DevSize = SIZE_2MiB, - .CmdSet = P_ID_AMD_STD, - .NumEraseRegions= 2, + .devtypes = CFI_DEVICETYPE_X16|CFI_DEVICETYPE_X8, + .uaddr = MTD_UADDR_0x0555_0x0AAA, /* ???? */ + .dev_size = SIZE_2MiB, + .cmd_set = P_ID_AMD_STD, + .nr_regions = 2, .regions = { ERASEINFO(0x10000,31), ERASEINFO(0x02000,8) @@ -606,13 +573,11 @@ static const struct amd_flash_info jedec_table[] = { .mfr_id = MANUFACTURER_ATMEL, .dev_id = AT49BV32X, .name = "Atmel AT49BV32X", - .uaddr = { - [0] = MTD_UADDR_0x0555_0x0AAA, /* x8 */ - [1] = MTD_UADDR_0x0555_0x0AAA /* x16 */ - }, - .DevSize = SIZE_4MiB, - .CmdSet = P_ID_AMD_STD, - .NumEraseRegions= 2, + .devtypes = CFI_DEVICETYPE_X16|CFI_DEVICETYPE_X8, + .uaddr = MTD_UADDR_0x0555_0x0AAA, /* ???? */ + .dev_size = SIZE_4MiB, + .cmd_set = P_ID_AMD_STD, + .nr_regions = 2, .regions = { ERASEINFO(0x02000,8), ERASEINFO(0x10000,63) @@ -621,13 +586,11 @@ static const struct amd_flash_info jedec_table[] = { .mfr_id = MANUFACTURER_ATMEL, .dev_id = AT49BV32XT, .name = "Atmel AT49BV32XT", - .uaddr = { - [0] = MTD_UADDR_0x0555_0x0AAA, /* x8 */ - [1] = MTD_UADDR_0x0555_0x0AAA /* x16 */ - }, - .DevSize = SIZE_4MiB, - .CmdSet = P_ID_AMD_STD, - .NumEraseRegions= 2, + .devtypes = CFI_DEVICETYPE_X16|CFI_DEVICETYPE_X8, + .uaddr = MTD_UADDR_0x0555_0x0AAA, /* ???? */ + .dev_size = SIZE_4MiB, + .cmd_set = P_ID_AMD_STD, + .nr_regions = 2, .regions = { ERASEINFO(0x10000,63), ERASEINFO(0x02000,8) @@ -636,12 +599,11 @@ static const struct amd_flash_info jedec_table[] = { .mfr_id = MANUFACTURER_FUJITSU, .dev_id = MBM29F040C, .name = "Fujitsu MBM29F040C", - .uaddr = { - [0] = MTD_UADDR_0x0AAA_0x0555, /* x8 */ - }, - .DevSize = SIZE_512KiB, - .CmdSet = P_ID_AMD_STD, - .NumEraseRegions= 1, + .devtypes = CFI_DEVICETYPE_X8, + .uaddr = MTD_UADDR_0x0AAA_0x0555, + .dev_size = SIZE_512KiB, + .cmd_set = P_ID_AMD_STD, + .nr_regions = 1, .regions = { ERASEINFO(0x10000,8) } @@ -649,13 +611,11 @@ static const struct amd_flash_info jedec_table[] = { .mfr_id = MANUFACTURER_FUJITSU, .dev_id = MBM29F800BA, .name = "Fujitsu MBM29F800BA", - .uaddr = { - [0] = MTD_UADDR_0x0AAA_0x0555, /* x8 */ - [1] = MTD_UADDR_0x0555_0x02AA, /* x16 */ - }, - .DevSize = SIZE_1MiB, - .CmdSet = P_ID_AMD_STD, - .NumEraseRegions= 4, + .devtypes = CFI_DEVICETYPE_X16|CFI_DEVICETYPE_X8, + .uaddr = MTD_UADDR_0x0AAA_0x0555, + .dev_size = SIZE_1MiB, + .cmd_set = P_ID_AMD_STD, + .nr_regions = 4, .regions = { ERASEINFO(0x04000,1), ERASEINFO(0x02000,2), @@ -666,12 +626,11 @@ static const struct amd_flash_info jedec_table[] = { .mfr_id = MANUFACTURER_FUJITSU, .dev_id = MBM29LV650UE, .name = "Fujitsu MBM29LV650UE", - .uaddr = { - [0] = MTD_UADDR_DONT_CARE /* x16 */ - }, - .DevSize = SIZE_8MiB, - .CmdSet = P_ID_AMD_STD, - .NumEraseRegions= 1, + .devtypes = CFI_DEVICETYPE_X8, + .uaddr = MTD_UADDR_DONT_CARE, + .dev_size = SIZE_8MiB, + .cmd_set = P_ID_AMD_STD, + .nr_regions = 1, .regions = { ERASEINFO(0x10000,128) } @@ -679,13 +638,11 @@ static const struct amd_flash_info jedec_table[] = { .mfr_id = MANUFACTURER_FUJITSU, .dev_id = MBM29LV320TE, .name = "Fujitsu MBM29LV320TE", - .uaddr = { - [0] = MTD_UADDR_0x0AAA_0x0555, /* x8 */ - [1] = MTD_UADDR_0x0555_0x02AA, /* x16 */ - }, - .DevSize = SIZE_4MiB, - .CmdSet = P_ID_AMD_STD, - .NumEraseRegions= 2, + .devtypes = CFI_DEVICETYPE_X16|CFI_DEVICETYPE_X8, + .uaddr = MTD_UADDR_0x0AAA_0x0555, + .dev_size = SIZE_4MiB, + .cmd_set = P_ID_AMD_STD, + .nr_regions = 2, .regions = { ERASEINFO(0x10000,63), ERASEINFO(0x02000,8) @@ -694,13 +651,11 @@ static const struct amd_flash_info jedec_table[] = { .mfr_id = MANUFACTURER_FUJITSU, .dev_id = MBM29LV320BE, .name = "Fujitsu MBM29LV320BE", - .uaddr = { - [0] = MTD_UADDR_0x0AAA_0x0555, /* x8 */ - [1] = MTD_UADDR_0x0555_0x02AA, /* x16 */ - }, - .DevSize = SIZE_4MiB, - .CmdSet = P_ID_AMD_STD, - .NumEraseRegions= 2, + .devtypes = CFI_DEVICETYPE_X16|CFI_DEVICETYPE_X8, + .uaddr = MTD_UADDR_0x0AAA_0x0555, + .dev_size = SIZE_4MiB, + .cmd_set = P_ID_AMD_STD, + .nr_regions = 2, .regions = { ERASEINFO(0x02000,8), ERASEINFO(0x10000,63) @@ -709,13 +664,11 @@ static const struct amd_flash_info jedec_table[] = { .mfr_id = MANUFACTURER_FUJITSU, .dev_id = MBM29LV160TE, .name = "Fujitsu MBM29LV160TE", - .uaddr = { - [0] = MTD_UADDR_0x0AAA_0x0555, /* x8 */ - [1] = MTD_UADDR_0x0555_0x02AA, /* x16 */ - }, - .DevSize = SIZE_2MiB, - .CmdSet = P_ID_AMD_STD, - .NumEraseRegions= 4, + .devtypes = CFI_DEVICETYPE_X16|CFI_DEVICETYPE_X8, + .uaddr = MTD_UADDR_0x0AAA_0x0555, + .dev_size = SIZE_2MiB, + .cmd_set = P_ID_AMD_STD, + .nr_regions = 4, .regions = { ERASEINFO(0x10000,31), ERASEINFO(0x08000,1), @@ -726,13 +679,11 @@ static const struct amd_flash_info jedec_table[] = { .mfr_id = MANUFACTURER_FUJITSU, .dev_id = MBM29LV160BE, .name = "Fujitsu MBM29LV160BE", - .uaddr = { - [0] = MTD_UADDR_0x0AAA_0x0555, /* x8 */ - [1] = MTD_UADDR_0x0555_0x02AA, /* x16 */ - }, - .DevSize = SIZE_2MiB, - .CmdSet = P_ID_AMD_STD, - .NumEraseRegions= 4, + .devtypes = CFI_DEVICETYPE_X16|CFI_DEVICETYPE_X8, + .uaddr = MTD_UADDR_0x0AAA_0x0555, + .dev_size = SIZE_2MiB, + .cmd_set = P_ID_AMD_STD, + .nr_regions = 4, .regions = { ERASEINFO(0x04000,1), ERASEINFO(0x02000,2), @@ -743,13 +694,11 @@ static const struct amd_flash_info jedec_table[] = { .mfr_id = MANUFACTURER_FUJITSU, .dev_id = MBM29LV800BA, .name = "Fujitsu MBM29LV800BA", - .uaddr = { - [0] = MTD_UADDR_0x0AAA_0x0555, /* x8 */ - [1] = MTD_UADDR_0x0555_0x02AA, /* x16 */ - }, - .DevSize = SIZE_1MiB, - .CmdSet = P_ID_AMD_STD, - .NumEraseRegions= 4, + .devtypes = CFI_DEVICETYPE_X16|CFI_DEVICETYPE_X8, + .uaddr = MTD_UADDR_0x0AAA_0x0555, + .dev_size = SIZE_1MiB, + .cmd_set = P_ID_AMD_STD, + .nr_regions = 4, .regions = { ERASEINFO(0x04000,1), ERASEINFO(0x02000,2), @@ -760,13 +709,11 @@ static const struct amd_flash_info jedec_table[] = { .mfr_id = MANUFACTURER_FUJITSU, .dev_id = MBM29LV800TA, .name = "Fujitsu MBM29LV800TA", - .uaddr = { - [0] = MTD_UADDR_0x0AAA_0x0555, /* x8 */ - [1] = MTD_UADDR_0x0555_0x02AA, /* x16 */ - }, - .DevSize = SIZE_1MiB, - .CmdSet = P_ID_AMD_STD, - .NumEraseRegions= 4, + .devtypes = CFI_DEVICETYPE_X16|CFI_DEVICETYPE_X8, + .uaddr = MTD_UADDR_0x0AAA_0x0555, + .dev_size = SIZE_1MiB, + .cmd_set = P_ID_AMD_STD, + .nr_regions = 4, .regions = { ERASEINFO(0x10000,15), ERASEINFO(0x08000,1), @@ -777,13 +724,11 @@ static const struct amd_flash_info jedec_table[] = { .mfr_id = MANUFACTURER_FUJITSU, .dev_id = MBM29LV400BC, .name = "Fujitsu MBM29LV400BC", - .uaddr = { - [0] = MTD_UADDR_0x0AAA_0x0555, /* x8 */ - [1] = MTD_UADDR_0x0555_0x02AA, /* x16 */ - }, - .DevSize = SIZE_512KiB, - .CmdSet = P_ID_AMD_STD, - .NumEraseRegions= 4, + .devtypes = CFI_DEVICETYPE_X16|CFI_DEVICETYPE_X8, + .uaddr = MTD_UADDR_0x0AAA_0x0555, + .dev_size = SIZE_512KiB, + .cmd_set = P_ID_AMD_STD, + .nr_regions = 4, .regions = { ERASEINFO(0x04000,1), ERASEINFO(0x02000,2), @@ -794,13 +739,11 @@ static const struct amd_flash_info jedec_table[] = { .mfr_id = MANUFACTURER_FUJITSU, .dev_id = MBM29LV400TC, .name = "Fujitsu MBM29LV400TC", - .uaddr = { - [0] = MTD_UADDR_0x0AAA_0x0555, /* x8 */ - [1] = MTD_UADDR_0x0555_0x02AA, /* x16 */ - }, - .DevSize = SIZE_512KiB, - .CmdSet = P_ID_AMD_STD, - .NumEraseRegions= 4, + .devtypes = CFI_DEVICETYPE_X16|CFI_DEVICETYPE_X8, + .uaddr = MTD_UADDR_0x0AAA_0x0555, + .dev_size = SIZE_512KiB, + .cmd_set = P_ID_AMD_STD, + .nr_regions = 4, .regions = { ERASEINFO(0x10000,7), ERASEINFO(0x08000,1), @@ -811,12 +754,11 @@ static const struct amd_flash_info jedec_table[] = { .mfr_id = MANUFACTURER_HYUNDAI, .dev_id = HY29F002T, .name = "Hyundai HY29F002T", - .uaddr = { - [0] = MTD_UADDR_0x0555_0x02AA /* x8 */ - }, - .DevSize = SIZE_256KiB, - .CmdSet = P_ID_AMD_STD, - .NumEraseRegions= 4, + .devtypes = CFI_DEVICETYPE_X8, + .uaddr = MTD_UADDR_0x0555_0x02AA, + .dev_size = SIZE_256KiB, + .cmd_set = P_ID_AMD_STD, + .nr_regions = 4, .regions = { ERASEINFO(0x10000,3), ERASEINFO(0x08000,1), @@ -827,12 +769,11 @@ static const struct amd_flash_info jedec_table[] = { .mfr_id = MANUFACTURER_INTEL, .dev_id = I28F004B3B, .name = "Intel 28F004B3B", - .uaddr = { - [0] = MTD_UADDR_UNNECESSARY, /* x8 */ - }, - .DevSize = SIZE_512KiB, - .CmdSet = P_ID_INTEL_STD, - .NumEraseRegions= 2, + .devtypes = CFI_DEVICETYPE_X8, + .uaddr = MTD_UADDR_UNNECESSARY, + .dev_size = SIZE_512KiB, + .cmd_set = P_ID_INTEL_STD, + .nr_regions = 2, .regions = { ERASEINFO(0x02000, 8), ERASEINFO(0x10000, 7), @@ -841,12 +782,11 @@ static const struct amd_flash_info jedec_table[] = { .mfr_id = MANUFACTURER_INTEL, .dev_id = I28F004B3T, .name = "Intel 28F004B3T", - .uaddr = { - [0] = MTD_UADDR_UNNECESSARY, /* x8 */ - }, - .DevSize = SIZE_512KiB, - .CmdSet = P_ID_INTEL_STD, - .NumEraseRegions= 2, + .devtypes = CFI_DEVICETYPE_X8, + .uaddr = MTD_UADDR_UNNECESSARY, + .dev_size = SIZE_512KiB, + .cmd_set = P_ID_INTEL_STD, + .nr_regions = 2, .regions = { ERASEINFO(0x10000, 7), ERASEINFO(0x02000, 8), @@ -855,13 +795,11 @@ static const struct amd_flash_info jedec_table[] = { .mfr_id = MANUFACTURER_INTEL, .dev_id = I28F400B3B, .name = "Intel 28F400B3B", - .uaddr = { - [0] = MTD_UADDR_UNNECESSARY, /* x8 */ - [1] = MTD_UADDR_UNNECESSARY, /* x16 */ - }, - .DevSize = SIZE_512KiB, - .CmdSet = P_ID_INTEL_STD, - .NumEraseRegions= 2, + .devtypes = CFI_DEVICETYPE_X16|CFI_DEVICETYPE_X8, + .uaddr = MTD_UADDR_UNNECESSARY, + .dev_size = SIZE_512KiB, + .cmd_set = P_ID_INTEL_STD, + .nr_regions = 2, .regions = { ERASEINFO(0x02000, 8), ERASEINFO(0x10000, 7), @@ -870,13 +808,11 @@ static const struct amd_flash_info jedec_table[] = { .mfr_id = MANUFACTURER_INTEL, .dev_id = I28F400B3T, .name = "Intel 28F400B3T", - .uaddr = { - [0] = MTD_UADDR_UNNECESSARY, /* x8 */ - [1] = MTD_UADDR_UNNECESSARY, /* x16 */ - }, - .DevSize = SIZE_512KiB, - .CmdSet = P_ID_INTEL_STD, - .NumEraseRegions= 2, + .devtypes = CFI_DEVICETYPE_X16|CFI_DEVICETYPE_X8, + .uaddr = MTD_UADDR_UNNECESSARY, + .dev_size = SIZE_512KiB, + .cmd_set = P_ID_INTEL_STD, + .nr_regions = 2, .regions = { ERASEINFO(0x10000, 7), ERASEINFO(0x02000, 8), @@ -885,12 +821,11 @@ static const struct amd_flash_info jedec_table[] = { .mfr_id = MANUFACTURER_INTEL, .dev_id = I28F008B3B, .name = "Intel 28F008B3B", - .uaddr = { - [0] = MTD_UADDR_UNNECESSARY, /* x8 */ - }, - .DevSize = SIZE_1MiB, - .CmdSet = P_ID_INTEL_STD, - .NumEraseRegions= 2, + .devtypes = CFI_DEVICETYPE_X8, + .uaddr = MTD_UADDR_UNNECESSARY, + .dev_size = SIZE_1MiB, + .cmd_set = P_ID_INTEL_STD, + .nr_regions = 2, .regions = { ERASEINFO(0x02000, 8), ERASEINFO(0x10000, 15), @@ -899,12 +834,11 @@ static const struct amd_flash_info jedec_table[] = { .mfr_id = MANUFACTURER_INTEL, .dev_id = I28F008B3T, .name = "Intel 28F008B3T", - .uaddr = { - [0] = MTD_UADDR_UNNECESSARY, /* x8 */ - }, - .DevSize = SIZE_1MiB, - .CmdSet = P_ID_INTEL_STD, - .NumEraseRegions= 2, + .devtypes = CFI_DEVICETYPE_X8, + .uaddr = MTD_UADDR_UNNECESSARY, + .dev_size = SIZE_1MiB, + .cmd_set = P_ID_INTEL_STD, + .nr_regions = 2, .regions = { ERASEINFO(0x10000, 15), ERASEINFO(0x02000, 8), @@ -913,12 +847,11 @@ static const struct amd_flash_info jedec_table[] = { .mfr_id = MANUFACTURER_INTEL, .dev_id = I28F008S5, .name = "Intel 28F008S5", - .uaddr = { - [0] = MTD_UADDR_UNNECESSARY, /* x8 */ - }, - .DevSize = SIZE_1MiB, - .CmdSet = P_ID_INTEL_EXT, - .NumEraseRegions= 1, + .devtypes = CFI_DEVICETYPE_X8, + .uaddr = MTD_UADDR_UNNECESSARY, + .dev_size = SIZE_1MiB, + .cmd_set = P_ID_INTEL_EXT, + .nr_regions = 1, .regions = { ERASEINFO(0x10000,16), } @@ -926,12 +859,11 @@ static const struct amd_flash_info jedec_table[] = { .mfr_id = MANUFACTURER_INTEL, .dev_id = I28F016S5, .name = "Intel 28F016S5", - .uaddr = { - [0] = MTD_UADDR_UNNECESSARY, /* x8 */ - }, - .DevSize = SIZE_2MiB, - .CmdSet = P_ID_INTEL_EXT, - .NumEraseRegions= 1, + .devtypes = CFI_DEVICETYPE_X8, + .uaddr = MTD_UADDR_UNNECESSARY, + .dev_size = SIZE_2MiB, + .cmd_set = P_ID_INTEL_EXT, + .nr_regions = 1, .regions = { ERASEINFO(0x10000,32), } @@ -939,12 +871,11 @@ static const struct amd_flash_info jedec_table[] = { .mfr_id = MANUFACTURER_INTEL, .dev_id = I28F008SA, .name = "Intel 28F008SA", - .uaddr = { - [0] = MTD_UADDR_UNNECESSARY, /* x8 */ - }, - .DevSize = SIZE_1MiB, - .CmdSet = P_ID_INTEL_STD, - .NumEraseRegions= 1, + .devtypes = CFI_DEVICETYPE_X8, + .uaddr = MTD_UADDR_UNNECESSARY, + .dev_size = SIZE_1MiB, + .cmd_set = P_ID_INTEL_STD, + .nr_regions = 1, .regions = { ERASEINFO(0x10000, 16), } @@ -952,12 +883,11 @@ static const struct amd_flash_info jedec_table[] = { .mfr_id = MANUFACTURER_INTEL, .dev_id = I28F800B3B, .name = "Intel 28F800B3B", - .uaddr = { - [1] = MTD_UADDR_UNNECESSARY, /* x16 */ - }, - .DevSize = SIZE_1MiB, - .CmdSet = P_ID_INTEL_STD, - .NumEraseRegions= 2, + .devtypes = CFI_DEVICETYPE_X16, + .uaddr = MTD_UADDR_UNNECESSARY, + .dev_size = SIZE_1MiB, + .cmd_set = P_ID_INTEL_STD, + .nr_regions = 2, .regions = { ERASEINFO(0x02000, 8), ERASEINFO(0x10000, 15), @@ -966,12 +896,11 @@ static const struct amd_flash_info jedec_table[] = { .mfr_id = MANUFACTURER_INTEL, .dev_id = I28F800B3T, .name = "Intel 28F800B3T", - .uaddr = { - [1] = MTD_UADDR_UNNECESSARY, /* x16 */ - }, - .DevSize = SIZE_1MiB, - .CmdSet = P_ID_INTEL_STD, - .NumEraseRegions= 2, + .devtypes = CFI_DEVICETYPE_X16, + .uaddr = MTD_UADDR_UNNECESSARY, + .dev_size = SIZE_1MiB, + .cmd_set = P_ID_INTEL_STD, + .nr_regions = 2, .regions = { ERASEINFO(0x10000, 15), ERASEINFO(0x02000, 8), @@ -980,12 +909,11 @@ static const struct amd_flash_info jedec_table[] = { .mfr_id = MANUFACTURER_INTEL, .dev_id = I28F016B3B, .name = "Intel 28F016B3B", - .uaddr = { - [0] = MTD_UADDR_UNNECESSARY, /* x8 */ - }, - .DevSize = SIZE_2MiB, - .CmdSet = P_ID_INTEL_STD, - .NumEraseRegions= 2, + .devtypes = CFI_DEVICETYPE_X8, + .uaddr = MTD_UADDR_UNNECESSARY, + .dev_size = SIZE_2MiB, + .cmd_set = P_ID_INTEL_STD, + .nr_regions = 2, .regions = { ERASEINFO(0x02000, 8), ERASEINFO(0x10000, 31), @@ -994,12 +922,11 @@ static const struct amd_flash_info jedec_table[] = { .mfr_id = MANUFACTURER_INTEL, .dev_id = I28F016S3, .name = "Intel I28F016S3", - .uaddr = { - [0] = MTD_UADDR_UNNECESSARY, /* x8 */ - }, - .DevSize = SIZE_2MiB, - .CmdSet = P_ID_INTEL_STD, - .NumEraseRegions= 1, + .devtypes = CFI_DEVICETYPE_X8, + .uaddr = MTD_UADDR_UNNECESSARY, + .dev_size = SIZE_2MiB, + .cmd_set = P_ID_INTEL_STD, + .nr_regions = 1, .regions = { ERASEINFO(0x10000, 32), } @@ -1007,12 +934,11 @@ static const struct amd_flash_info jedec_table[] = { .mfr_id = MANUFACTURER_INTEL, .dev_id = I28F016B3T, .name = "Intel 28F016B3T", - .uaddr = { - [0] = MTD_UADDR_UNNECESSARY, /* x8 */ - }, - .DevSize = SIZE_2MiB, - .CmdSet = P_ID_INTEL_STD, - .NumEraseRegions= 2, + .devtypes = CFI_DEVICETYPE_X8, + .uaddr = MTD_UADDR_UNNECESSARY, + .dev_size = SIZE_2MiB, + .cmd_set = P_ID_INTEL_STD, + .nr_regions = 2, .regions = { ERASEINFO(0x10000, 31), ERASEINFO(0x02000, 8), @@ -1021,12 +947,11 @@ static const struct amd_flash_info jedec_table[] = { .mfr_id = MANUFACTURER_INTEL, .dev_id = I28F160B3B, .name = "Intel 28F160B3B", - .uaddr = { - [1] = MTD_UADDR_UNNECESSARY, /* x16 */ - }, - .DevSize = SIZE_2MiB, - .CmdSet = P_ID_INTEL_STD, - .NumEraseRegions= 2, + .devtypes = CFI_DEVICETYPE_X16, + .uaddr = MTD_UADDR_UNNECESSARY, + .dev_size = SIZE_2MiB, + .cmd_set = P_ID_INTEL_STD, + .nr_regions = 2, .regions = { ERASEINFO(0x02000, 8), ERASEINFO(0x10000, 31), @@ -1035,12 +960,11 @@ static const struct amd_flash_info jedec_table[] = { .mfr_id = MANUFACTURER_INTEL, .dev_id = I28F160B3T, .name = "Intel 28F160B3T", - .uaddr = { - [1] = MTD_UADDR_UNNECESSARY, /* x16 */ - }, - .DevSize = SIZE_2MiB, - .CmdSet = P_ID_INTEL_STD, - .NumEraseRegions= 2, + .devtypes = CFI_DEVICETYPE_X16, + .uaddr = MTD_UADDR_UNNECESSARY, + .dev_size = SIZE_2MiB, + .cmd_set = P_ID_INTEL_STD, + .nr_regions = 2, .regions = { ERASEINFO(0x10000, 31), ERASEINFO(0x02000, 8), @@ -1049,12 +973,11 @@ static const struct amd_flash_info jedec_table[] = { .mfr_id = MANUFACTURER_INTEL, .dev_id = I28F320B3B, .name = "Intel 28F320B3B", - .uaddr = { - [1] = MTD_UADDR_UNNECESSARY, /* x16 */ - }, - .DevSize = SIZE_4MiB, - .CmdSet = P_ID_INTEL_STD, - .NumEraseRegions= 2, + .devtypes = CFI_DEVICETYPE_X16, + .uaddr = MTD_UADDR_UNNECESSARY, + .dev_size = SIZE_4MiB, + .cmd_set = P_ID_INTEL_STD, + .nr_regions = 2, .regions = { ERASEINFO(0x02000, 8), ERASEINFO(0x10000, 63), @@ -1063,12 +986,11 @@ static const struct amd_flash_info jedec_table[] = { .mfr_id = MANUFACTURER_INTEL, .dev_id = I28F320B3T, .name = "Intel 28F320B3T", - .uaddr = { - [1] = MTD_UADDR_UNNECESSARY, /* x16 */ - }, - .DevSize = SIZE_4MiB, - .CmdSet = P_ID_INTEL_STD, - .NumEraseRegions= 2, + .devtypes = CFI_DEVICETYPE_X16, + .uaddr = MTD_UADDR_UNNECESSARY, + .dev_size = SIZE_4MiB, + .cmd_set = P_ID_INTEL_STD, + .nr_regions = 2, .regions = { ERASEINFO(0x10000, 63), ERASEINFO(0x02000, 8), @@ -1077,12 +999,11 @@ static const struct amd_flash_info jedec_table[] = { .mfr_id = MANUFACTURER_INTEL, .dev_id = I28F640B3B, .name = "Intel 28F640B3B", - .uaddr = { - [1] = MTD_UADDR_UNNECESSARY, /* x16 */ - }, - .DevSize = SIZE_8MiB, - .CmdSet = P_ID_INTEL_STD, - .NumEraseRegions= 2, + .devtypes = CFI_DEVICETYPE_X16, + .uaddr = MTD_UADDR_UNNECESSARY, + .dev_size = SIZE_8MiB, + .cmd_set = P_ID_INTEL_STD, + .nr_regions = 2, .regions = { ERASEINFO(0x02000, 8), ERASEINFO(0x10000, 127), @@ -1091,12 +1012,11 @@ static const struct amd_flash_info jedec_table[] = { .mfr_id = MANUFACTURER_INTEL, .dev_id = I28F640B3T, .name = "Intel 28F640B3T", - .uaddr = { - [1] = MTD_UADDR_UNNECESSARY, /* x16 */ - }, - .DevSize = SIZE_8MiB, - .CmdSet = P_ID_INTEL_STD, - .NumEraseRegions= 2, + .devtypes = CFI_DEVICETYPE_X16, + .uaddr = MTD_UADDR_UNNECESSARY, + .dev_size = SIZE_8MiB, + .cmd_set = P_ID_INTEL_STD, + .nr_regions = 2, .regions = { ERASEINFO(0x10000, 127), ERASEINFO(0x02000, 8), @@ -1105,12 +1025,11 @@ static const struct amd_flash_info jedec_table[] = { .mfr_id = MANUFACTURER_INTEL, .dev_id = I82802AB, .name = "Intel 82802AB", - .uaddr = { - [0] = MTD_UADDR_UNNECESSARY, /* x8 */ - }, - .DevSize = SIZE_512KiB, - .CmdSet = P_ID_INTEL_EXT, - .NumEraseRegions= 1, + .devtypes = CFI_DEVICETYPE_X8, + .uaddr = MTD_UADDR_UNNECESSARY, + .dev_size = SIZE_512KiB, + .cmd_set = P_ID_INTEL_EXT, + .nr_regions = 1, .regions = { ERASEINFO(0x10000,8), } @@ -1118,12 +1037,11 @@ static const struct amd_flash_info jedec_table[] = { .mfr_id = MANUFACTURER_INTEL, .dev_id = I82802AC, .name = "Intel 82802AC", - .uaddr = { - [0] = MTD_UADDR_UNNECESSARY, /* x8 */ - }, - .DevSize = SIZE_1MiB, - .CmdSet = P_ID_INTEL_EXT, - .NumEraseRegions= 1, + .devtypes = CFI_DEVICETYPE_X8, + .uaddr = MTD_UADDR_UNNECESSARY, + .dev_size = SIZE_1MiB, + .cmd_set = P_ID_INTEL_EXT, + .nr_regions = 1, .regions = { ERASEINFO(0x10000,16), } @@ -1131,12 +1049,11 @@ static const struct amd_flash_info jedec_table[] = { .mfr_id = MANUFACTURER_MACRONIX, .dev_id = MX29LV040C, .name = "Macronix MX29LV040C", - .uaddr = { - [0] = MTD_UADDR_0x0555_0x02AA, /* x8 */ - }, - .DevSize = SIZE_512KiB, - .CmdSet = P_ID_AMD_STD, - .NumEraseRegions= 1, + .devtypes = CFI_DEVICETYPE_X8, + .uaddr = MTD_UADDR_0x0555_0x02AA, + .dev_size = SIZE_512KiB, + .cmd_set = P_ID_AMD_STD, + .nr_regions = 1, .regions = { ERASEINFO(0x10000,8), } @@ -1144,13 +1061,11 @@ static const struct amd_flash_info jedec_table[] = { .mfr_id = MANUFACTURER_MACRONIX, .dev_id = MX29LV160T, .name = "MXIC MX29LV160T", - .uaddr = { - [0] = MTD_UADDR_0x0AAA_0x0555, /* x8 */ - [1] = MTD_UADDR_0x0555_0x02AA, /* x16 */ - }, - .DevSize = SIZE_2MiB, - .CmdSet = P_ID_AMD_STD, - .NumEraseRegions= 4, + .devtypes = CFI_DEVICETYPE_X16|CFI_DEVICETYPE_X8, + .uaddr = MTD_UADDR_0x0AAA_0x0555, + .dev_size = SIZE_2MiB, + .cmd_set = P_ID_AMD_STD, + .nr_regions = 4, .regions = { ERASEINFO(0x10000,31), ERASEINFO(0x08000,1), @@ -1161,13 +1076,11 @@ static const struct amd_flash_info jedec_table[] = { .mfr_id = MANUFACTURER_NEC, .dev_id = UPD29F064115, .name = "NEC uPD29F064115", - .uaddr = { - [0] = MTD_UADDR_0x0555_0x02AA, /* x8 */ - [1] = MTD_UADDR_0x0555_0x02AA, /* x16 */ - }, - .DevSize = SIZE_8MiB, - .CmdSet = P_ID_AMD_STD, - .NumEraseRegions= 3, + .devtypes = CFI_DEVICETYPE_X16|CFI_DEVICETYPE_X8, + .uaddr = MTD_UADDR_0x0555_0x02AA, /* ???? */ + .dev_size = SIZE_8MiB, + .cmd_set = P_ID_AMD_STD, + .nr_regions = 3, .regions = { ERASEINFO(0x2000,8), ERASEINFO(0x10000,126), @@ -1177,13 +1090,11 @@ static const struct amd_flash_info jedec_table[] = { .mfr_id = MANUFACTURER_MACRONIX, .dev_id = MX29LV160B, .name = "MXIC MX29LV160B", - .uaddr = { - [0] = MTD_UADDR_0x0AAA_0x0555, /* x8 */ - [1] = MTD_UADDR_0x0555_0x02AA, /* x16 */ - }, - .DevSize = SIZE_2MiB, - .CmdSet = P_ID_AMD_STD, - .NumEraseRegions= 4, + .devtypes = CFI_DEVICETYPE_X16|CFI_DEVICETYPE_X8, + .uaddr = MTD_UADDR_0x0AAA_0x0555, + .dev_size = SIZE_2MiB, + .cmd_set = P_ID_AMD_STD, + .nr_regions = 4, .regions = { ERASEINFO(0x04000,1), ERASEINFO(0x02000,2), @@ -1194,12 +1105,11 @@ static const struct amd_flash_info jedec_table[] = { .mfr_id = MANUFACTURER_MACRONIX, .dev_id = MX29F040, .name = "Macronix MX29F040", - .uaddr = { - [0] = MTD_UADDR_0x0555_0x02AA /* x8 */ - }, - .DevSize = SIZE_512KiB, - .CmdSet = P_ID_AMD_STD, - .NumEraseRegions= 1, + .devtypes = CFI_DEVICETYPE_X8, + .uaddr = MTD_UADDR_0x0555_0x02AA, + .dev_size = SIZE_512KiB, + .cmd_set = P_ID_AMD_STD, + .nr_regions = 1, .regions = { ERASEINFO(0x10000,8), } @@ -1207,12 +1117,11 @@ static const struct amd_flash_info jedec_table[] = { .mfr_id = MANUFACTURER_MACRONIX, .dev_id = MX29F016, .name = "Macronix MX29F016", - .uaddr = { - [0] = MTD_UADDR_0x0555_0x02AA /* x8 */ - }, - .DevSize = SIZE_2MiB, - .CmdSet = P_ID_AMD_STD, - .NumEraseRegions= 1, + .devtypes = CFI_DEVICETYPE_X8, + .uaddr = MTD_UADDR_0x0555_0x02AA, + .dev_size = SIZE_2MiB, + .cmd_set = P_ID_AMD_STD, + .nr_regions = 1, .regions = { ERASEINFO(0x10000,32), } @@ -1220,12 +1129,11 @@ static const struct amd_flash_info jedec_table[] = { .mfr_id = MANUFACTURER_MACRONIX, .dev_id = MX29F004T, .name = "Macronix MX29F004T", - .uaddr = { - [0] = MTD_UADDR_0x0555_0x02AA /* x8 */ - }, - .DevSize = SIZE_512KiB, - .CmdSet = P_ID_AMD_STD, - .NumEraseRegions= 4, + .devtypes = CFI_DEVICETYPE_X8, + .uaddr = MTD_UADDR_0x0555_0x02AA, + .dev_size = SIZE_512KiB, + .cmd_set = P_ID_AMD_STD, + .nr_regions = 4, .regions = { ERASEINFO(0x10000,7), ERASEINFO(0x08000,1), @@ -1236,12 +1144,11 @@ static const struct amd_flash_info jedec_table[] = { .mfr_id = MANUFACTURER_MACRONIX, .dev_id = MX29F004B, .name = "Macronix MX29F004B", - .uaddr = { - [0] = MTD_UADDR_0x0555_0x02AA /* x8 */ - }, - .DevSize = SIZE_512KiB, - .CmdSet = P_ID_AMD_STD, - .NumEraseRegions= 4, + .devtypes = CFI_DEVICETYPE_X8, + .uaddr = MTD_UADDR_0x0555_0x02AA, + .dev_size = SIZE_512KiB, + .cmd_set = P_ID_AMD_STD, + .nr_regions = 4, .regions = { ERASEINFO(0x04000,1), ERASEINFO(0x02000,2), @@ -1252,12 +1159,11 @@ static const struct amd_flash_info jedec_table[] = { .mfr_id = MANUFACTURER_MACRONIX, .dev_id = MX29F002T, .name = "Macronix MX29F002T", - .uaddr = { - [0] = MTD_UADDR_0x0555_0x02AA /* x8 */ - }, - .DevSize = SIZE_256KiB, - .CmdSet = P_ID_AMD_STD, - .NumEraseRegions= 4, + .devtypes = CFI_DEVICETYPE_X8, + .uaddr = MTD_UADDR_0x0555_0x02AA, + .dev_size = SIZE_256KiB, + .cmd_set = P_ID_AMD_STD, + .nr_regions = 4, .regions = { ERASEINFO(0x10000,3), ERASEINFO(0x08000,1), @@ -1268,12 +1174,11 @@ static const struct amd_flash_info jedec_table[] = { .mfr_id = MANUFACTURER_PMC, .dev_id = PM49FL002, .name = "PMC Pm49FL002", - .uaddr = { - [0] = MTD_UADDR_0x5555_0x2AAA /* x8 */ - }, - .DevSize = SIZE_256KiB, - .CmdSet = P_ID_AMD_STD, - .NumEraseRegions= 1, + .devtypes = CFI_DEVICETYPE_X8, + .uaddr = MTD_UADDR_0x5555_0x2AAA, + .dev_size = SIZE_256KiB, + .cmd_set = P_ID_AMD_STD, + .nr_regions = 1, .regions = { ERASEINFO( 0x01000, 64 ) } @@ -1281,12 +1186,11 @@ static const struct amd_flash_info jedec_table[] = { .mfr_id = MANUFACTURER_PMC, .dev_id = PM49FL004, .name = "PMC Pm49FL004", - .uaddr = { - [0] = MTD_UADDR_0x5555_0x2AAA /* x8 */ - }, - .DevSize = SIZE_512KiB, - .CmdSet = P_ID_AMD_STD, - .NumEraseRegions= 1, + .devtypes = CFI_DEVICETYPE_X8, + .uaddr = MTD_UADDR_0x5555_0x2AAA, + .dev_size = SIZE_512KiB, + .cmd_set = P_ID_AMD_STD, + .nr_regions = 1, .regions = { ERASEINFO( 0x01000, 128 ) } @@ -1294,12 +1198,11 @@ static const struct amd_flash_info jedec_table[] = { .mfr_id = MANUFACTURER_PMC, .dev_id = PM49FL008, .name = "PMC Pm49FL008", - .uaddr = { - [0] = MTD_UADDR_0x5555_0x2AAA /* x8 */ - }, - .DevSize = SIZE_1MiB, - .CmdSet = P_ID_AMD_STD, - .NumEraseRegions= 1, + .devtypes = CFI_DEVICETYPE_X8, + .uaddr = MTD_UADDR_0x5555_0x2AAA, + .dev_size = SIZE_1MiB, + .cmd_set = P_ID_AMD_STD, + .nr_regions = 1, .regions = { ERASEINFO( 0x01000, 256 ) } @@ -1307,25 +1210,23 @@ static const struct amd_flash_info jedec_table[] = { .mfr_id = MANUFACTURER_SHARP, .dev_id = LH28F640BF, .name = "LH28F640BF", - .uaddr = { - [0] = MTD_UADDR_UNNECESSARY, /* x8 */ - }, - .DevSize = SIZE_4MiB, - .CmdSet = P_ID_INTEL_STD, - .NumEraseRegions= 1, - .regions = { + .devtypes = CFI_DEVICETYPE_X8, + .uaddr = MTD_UADDR_UNNECESSARY, + .dev_size = SIZE_4MiB, + .cmd_set = P_ID_INTEL_STD, + .nr_regions = 1, + .regions = { ERASEINFO(0x40000,16), } }, { .mfr_id = MANUFACTURER_SST, .dev_id = SST39LF512, .name = "SST 39LF512", - .uaddr = { - [0] = MTD_UADDR_0x5555_0x2AAA /* x8 */ - }, - .DevSize = SIZE_64KiB, - .CmdSet = P_ID_AMD_STD, - .NumEraseRegions= 1, + .devtypes = CFI_DEVICETYPE_X8, + .uaddr = MTD_UADDR_0x5555_0x2AAA, + .dev_size = SIZE_64KiB, + .cmd_set = P_ID_AMD_STD, + .nr_regions = 1, .regions = { ERASEINFO(0x01000,16), } @@ -1333,12 +1234,11 @@ static const struct amd_flash_info jedec_table[] = { .mfr_id = MANUFACTURER_SST, .dev_id = SST39LF010, .name = "SST 39LF010", - .uaddr = { - [0] = MTD_UADDR_0x5555_0x2AAA /* x8 */ - }, - .DevSize = SIZE_128KiB, - .CmdSet = P_ID_AMD_STD, - .NumEraseRegions= 1, + .devtypes = CFI_DEVICETYPE_X8, + .uaddr = MTD_UADDR_0x5555_0x2AAA, + .dev_size = SIZE_128KiB, + .cmd_set = P_ID_AMD_STD, + .nr_regions = 1, .regions = { ERASEINFO(0x01000,32), } @@ -1346,36 +1246,33 @@ static const struct amd_flash_info jedec_table[] = { .mfr_id = MANUFACTURER_SST, .dev_id = SST29EE020, .name = "SST 29EE020", - .uaddr = { - [0] = MTD_UADDR_0x5555_0x2AAA /* x8 */ - }, - .DevSize = SIZE_256KiB, - .CmdSet = P_ID_SST_PAGE, - .NumEraseRegions= 1, - .regions = {ERASEINFO(0x01000,64), - } - }, { + .devtypes = CFI_DEVICETYPE_X8, + .uaddr = MTD_UADDR_0x5555_0x2AAA, + .dev_size = SIZE_256KiB, + .cmd_set = P_ID_SST_PAGE, + .nr_regions = 1, + .regions = {ERASEINFO(0x01000,64), + } + }, { .mfr_id = MANUFACTURER_SST, .dev_id = SST29LE020, .name = "SST 29LE020", - .uaddr = { - [0] = MTD_UADDR_0x5555_0x2AAA /* x8 */ - }, - .DevSize = SIZE_256KiB, - .CmdSet = P_ID_SST_PAGE, - .NumEraseRegions= 1, - .regions = {ERASEINFO(0x01000,64), - } + .devtypes = CFI_DEVICETYPE_X8, + .uaddr = MTD_UADDR_0x5555_0x2AAA, + .dev_size = SIZE_256KiB, + .cmd_set = P_ID_SST_PAGE, + .nr_regions = 1, + .regions = {ERASEINFO(0x01000,64), + } }, { .mfr_id = MANUFACTURER_SST, .dev_id = SST39LF020, .name = "SST 39LF020", - .uaddr = { - [0] = MTD_UADDR_0x5555_0x2AAA /* x8 */ - }, - .DevSize = SIZE_256KiB, - .CmdSet = P_ID_AMD_STD, - .NumEraseRegions= 1, + .devtypes = CFI_DEVICETYPE_X8, + .uaddr = MTD_UADDR_0x5555_0x2AAA, + .dev_size = SIZE_256KiB, + .cmd_set = P_ID_AMD_STD, + .nr_regions = 1, .regions = { ERASEINFO(0x01000,64), } @@ -1383,12 +1280,11 @@ static const struct amd_flash_info jedec_table[] = { .mfr_id = MANUFACTURER_SST, .dev_id = SST39LF040, .name = "SST 39LF040", - .uaddr = { - [0] = MTD_UADDR_0x5555_0x2AAA /* x8 */ - }, - .DevSize = SIZE_512KiB, - .CmdSet = P_ID_AMD_STD, - .NumEraseRegions= 1, + .devtypes = CFI_DEVICETYPE_X8, + .uaddr = MTD_UADDR_0x5555_0x2AAA, + .dev_size = SIZE_512KiB, + .cmd_set = P_ID_AMD_STD, + .nr_regions = 1, .regions = { ERASEINFO(0x01000,128), } @@ -1396,12 +1292,11 @@ static const struct amd_flash_info jedec_table[] = { .mfr_id = MANUFACTURER_SST, .dev_id = SST39SF010A, .name = "SST 39SF010A", - .uaddr = { - [0] = MTD_UADDR_0x5555_0x2AAA /* x8 */ - }, - .DevSize = SIZE_128KiB, - .CmdSet = P_ID_AMD_STD, - .NumEraseRegions= 1, + .devtypes = CFI_DEVICETYPE_X8, + .uaddr = MTD_UADDR_0x5555_0x2AAA, + .dev_size = SIZE_128KiB, + .cmd_set = P_ID_AMD_STD, + .nr_regions = 1, .regions = { ERASEINFO(0x01000,32), } @@ -1409,26 +1304,24 @@ static const struct amd_flash_info jedec_table[] = { .mfr_id = MANUFACTURER_SST, .dev_id = SST39SF020A, .name = "SST 39SF020A", - .uaddr = { - [0] = MTD_UADDR_0x5555_0x2AAA /* x8 */ - }, - .DevSize = SIZE_256KiB, - .CmdSet = P_ID_AMD_STD, - .NumEraseRegions= 1, + .devtypes = CFI_DEVICETYPE_X8, + .uaddr = MTD_UADDR_0x5555_0x2AAA, + .dev_size = SIZE_256KiB, + .cmd_set = P_ID_AMD_STD, + .nr_regions = 1, .regions = { ERASEINFO(0x01000,64), } }, { .mfr_id = MANUFACTURER_SST, - .dev_id = SST49LF040B, - .name = "SST 49LF040B", - .uaddr = { - [0] = MTD_UADDR_0x5555_0x2AAA /* x8 */ - }, - .DevSize = SIZE_512KiB, - .CmdSet = P_ID_AMD_STD, - .NumEraseRegions= 1, - .regions = { + .dev_id = SST49LF040B, + .name = "SST 49LF040B", + .devtypes = CFI_DEVICETYPE_X8, + .uaddr = MTD_UADDR_0x5555_0x2AAA, + .dev_size = SIZE_512KiB, + .cmd_set = P_ID_AMD_STD, + .nr_regions = 1, + .regions = { ERASEINFO(0x01000,128), } }, { @@ -1436,12 +1329,11 @@ static const struct amd_flash_info jedec_table[] = { .mfr_id = MANUFACTURER_SST, .dev_id = SST49LF004B, .name = "SST 49LF004B", - .uaddr = { - [0] = MTD_UADDR_0x5555_0x2AAA /* x8 */ - }, - .DevSize = SIZE_512KiB, - .CmdSet = P_ID_AMD_STD, - .NumEraseRegions= 1, + .devtypes = CFI_DEVICETYPE_X8, + .uaddr = MTD_UADDR_0x5555_0x2AAA, + .dev_size = SIZE_512KiB, + .cmd_set = P_ID_AMD_STD, + .nr_regions = 1, .regions = { ERASEINFO(0x01000,128), } @@ -1449,12 +1341,11 @@ static const struct amd_flash_info jedec_table[] = { .mfr_id = MANUFACTURER_SST, .dev_id = SST49LF008A, .name = "SST 49LF008A", - .uaddr = { - [0] = MTD_UADDR_0x5555_0x2AAA /* x8 */ - }, - .DevSize = SIZE_1MiB, - .CmdSet = P_ID_AMD_STD, - .NumEraseRegions= 1, + .devtypes = CFI_DEVICETYPE_X8, + .uaddr = MTD_UADDR_0x5555_0x2AAA, + .dev_size = SIZE_1MiB, + .cmd_set = P_ID_AMD_STD, + .nr_regions = 1, .regions = { ERASEINFO(0x01000,256), } @@ -1462,12 +1353,11 @@ static const struct amd_flash_info jedec_table[] = { .mfr_id = MANUFACTURER_SST, .dev_id = SST49LF030A, .name = "SST 49LF030A", - .uaddr = { - [0] = MTD_UADDR_0x5555_0x2AAA /* x8 */ - }, - .DevSize = SIZE_512KiB, - .CmdSet = P_ID_AMD_STD, - .NumEraseRegions= 1, + .devtypes = CFI_DEVICETYPE_X8, + .uaddr = MTD_UADDR_0x5555_0x2AAA, + .dev_size = SIZE_512KiB, + .cmd_set = P_ID_AMD_STD, + .nr_regions = 1, .regions = { ERASEINFO(0x01000,96), } @@ -1475,12 +1365,11 @@ static const struct amd_flash_info jedec_table[] = { .mfr_id = MANUFACTURER_SST, .dev_id = SST49LF040A, .name = "SST 49LF040A", - .uaddr = { - [0] = MTD_UADDR_0x5555_0x2AAA /* x8 */ - }, - .DevSize = SIZE_512KiB, - .CmdSet = P_ID_AMD_STD, - .NumEraseRegions= 1, + .devtypes = CFI_DEVICETYPE_X8, + .uaddr = MTD_UADDR_0x5555_0x2AAA, + .dev_size = SIZE_512KiB, + .cmd_set = P_ID_AMD_STD, + .nr_regions = 1, .regions = { ERASEINFO(0x01000,128), } @@ -1488,57 +1377,49 @@ static const struct amd_flash_info jedec_table[] = { .mfr_id = MANUFACTURER_SST, .dev_id = SST49LF080A, .name = "SST 49LF080A", - .uaddr = { - [0] = MTD_UADDR_0x5555_0x2AAA /* x8 */ - }, - .DevSize = SIZE_1MiB, - .CmdSet = P_ID_AMD_STD, - .NumEraseRegions= 1, + .devtypes = CFI_DEVICETYPE_X8, + .uaddr = MTD_UADDR_0x5555_0x2AAA, + .dev_size = SIZE_1MiB, + .cmd_set = P_ID_AMD_STD, + .nr_regions = 1, .regions = { ERASEINFO(0x01000,256), } }, { - .mfr_id = MANUFACTURER_SST, /* should be CFI */ - .dev_id = SST39LF160, - .name = "SST 39LF160", - .uaddr = { - [0] = MTD_UADDR_0x5555_0x2AAA, /* x8 */ - [1] = MTD_UADDR_0x5555_0x2AAA /* x16 */ - }, - .DevSize = SIZE_2MiB, - .CmdSet = P_ID_AMD_STD, - .NumEraseRegions= 2, - .regions = { - ERASEINFO(0x1000,256), - ERASEINFO(0x1000,256) - } - }, { - .mfr_id = MANUFACTURER_SST, /* should be CFI */ - .dev_id = SST39VF1601, - .name = "SST 39VF1601", - .uaddr = { - [0] = MTD_UADDR_0x5555_0x2AAA, /* x8 */ - [1] = MTD_UADDR_0x5555_0x2AAA /* x16 */ - }, - .DevSize = SIZE_2MiB, - .CmdSet = P_ID_AMD_STD, - .NumEraseRegions= 2, - .regions = { - ERASEINFO(0x1000,256), - ERASEINFO(0x1000,256) - } - + .mfr_id = MANUFACTURER_SST, /* should be CFI */ + .dev_id = SST39LF160, + .name = "SST 39LF160", + .devtypes = CFI_DEVICETYPE_X16|CFI_DEVICETYPE_X8, + .uaddr = MTD_UADDR_0x5555_0x2AAA, /* ???? */ + .dev_size = SIZE_2MiB, + .cmd_set = P_ID_AMD_STD, + .nr_regions = 2, + .regions = { + ERASEINFO(0x1000,256), + ERASEINFO(0x1000,256) + } + }, { + .mfr_id = MANUFACTURER_SST, /* should be CFI */ + .dev_id = SST39VF1601, + .name = "SST 39VF1601", + .devtypes = CFI_DEVICETYPE_X16|CFI_DEVICETYPE_X8, + .uaddr = MTD_UADDR_0x5555_0x2AAA, /* ???? */ + .dev_size = SIZE_2MiB, + .cmd_set = P_ID_AMD_STD, + .nr_regions = 2, + .regions = { + ERASEINFO(0x1000,256), + ERASEINFO(0x1000,256) + } }, { .mfr_id = MANUFACTURER_ST, .dev_id = M29F800AB, .name = "ST M29F800AB", - .uaddr = { - [0] = MTD_UADDR_0x0AAA_0x0555, /* x8 */ - [1] = MTD_UADDR_0x0555_0x02AA, /* x16 */ - }, - .DevSize = SIZE_1MiB, - .CmdSet = P_ID_AMD_STD, - .NumEraseRegions= 4, + .devtypes = CFI_DEVICETYPE_X16|CFI_DEVICETYPE_X8, + .uaddr = MTD_UADDR_0x0AAA_0x0555, + .dev_size = SIZE_1MiB, + .cmd_set = P_ID_AMD_STD, + .nr_regions = 4, .regions = { ERASEINFO(0x04000,1), ERASEINFO(0x02000,2), @@ -1549,13 +1430,11 @@ static const struct amd_flash_info jedec_table[] = { .mfr_id = MANUFACTURER_ST, /* FIXME - CFI device? */ .dev_id = M29W800DT, .name = "ST M29W800DT", - .uaddr = { - [0] = MTD_UADDR_0x5555_0x2AAA, /* x8 */ - [1] = MTD_UADDR_0x5555_0x2AAA /* x16 */ - }, - .DevSize = SIZE_1MiB, - .CmdSet = P_ID_AMD_STD, - .NumEraseRegions= 4, + .devtypes = CFI_DEVICETYPE_X16|CFI_DEVICETYPE_X8, + .uaddr = MTD_UADDR_0x5555_0x2AAA, /* ???? */ + .dev_size = SIZE_1MiB, + .cmd_set = P_ID_AMD_STD, + .nr_regions = 4, .regions = { ERASEINFO(0x10000,15), ERASEINFO(0x08000,1), @@ -1566,13 +1445,11 @@ static const struct amd_flash_info jedec_table[] = { .mfr_id = MANUFACTURER_ST, /* FIXME - CFI device? */ .dev_id = M29W800DB, .name = "ST M29W800DB", - .uaddr = { - [0] = MTD_UADDR_0x5555_0x2AAA, /* x8 */ - [1] = MTD_UADDR_0x5555_0x2AAA /* x16 */ - }, - .DevSize = SIZE_1MiB, - .CmdSet = P_ID_AMD_STD, - .NumEraseRegions= 4, + .devtypes = CFI_DEVICETYPE_X16|CFI_DEVICETYPE_X8, + .uaddr = MTD_UADDR_0x5555_0x2AAA, /* ???? */ + .dev_size = SIZE_1MiB, + .cmd_set = P_ID_AMD_STD, + .nr_regions = 4, .regions = { ERASEINFO(0x04000,1), ERASEINFO(0x02000,2), @@ -1583,13 +1460,11 @@ static const struct amd_flash_info jedec_table[] = { .mfr_id = MANUFACTURER_ST, /* FIXME - CFI device? */ .dev_id = M29W160DT, .name = "ST M29W160DT", - .uaddr = { - [0] = MTD_UADDR_0x0555_0x02AA, /* x8 */ - [1] = MTD_UADDR_0x0555_0x02AA, /* x16 */ - }, - .DevSize = SIZE_2MiB, - .CmdSet = P_ID_AMD_STD, - .NumEraseRegions= 4, + .devtypes = CFI_DEVICETYPE_X16|CFI_DEVICETYPE_X8, + .uaddr = MTD_UADDR_0x0555_0x02AA, /* ???? */ + .dev_size = SIZE_2MiB, + .cmd_set = P_ID_AMD_STD, + .nr_regions = 4, .regions = { ERASEINFO(0x10000,31), ERASEINFO(0x08000,1), @@ -1600,13 +1475,11 @@ static const struct amd_flash_info jedec_table[] = { .mfr_id = MANUFACTURER_ST, /* FIXME - CFI device? */ .dev_id = M29W160DB, .name = "ST M29W160DB", - .uaddr = { - [0] = MTD_UADDR_0x0555_0x02AA, /* x8 */ - [1] = MTD_UADDR_0x0555_0x02AA, /* x16 */ - }, - .DevSize = SIZE_2MiB, - .CmdSet = P_ID_AMD_STD, - .NumEraseRegions= 4, + .devtypes = CFI_DEVICETYPE_X16|CFI_DEVICETYPE_X8, + .uaddr = MTD_UADDR_0x0555_0x02AA, /* ???? */ + .dev_size = SIZE_2MiB, + .cmd_set = P_ID_AMD_STD, + .nr_regions = 4, .regions = { ERASEINFO(0x04000,1), ERASEINFO(0x02000,2), @@ -1617,12 +1490,11 @@ static const struct amd_flash_info jedec_table[] = { .mfr_id = MANUFACTURER_ST, .dev_id = M29W040B, .name = "ST M29W040B", - .uaddr = { - [0] = MTD_UADDR_0x0555_0x02AA /* x8 */ - }, - .DevSize = SIZE_512KiB, - .CmdSet = P_ID_AMD_STD, - .NumEraseRegions= 1, + .devtypes = CFI_DEVICETYPE_X8, + .uaddr = MTD_UADDR_0x0555_0x02AA, + .dev_size = SIZE_512KiB, + .cmd_set = P_ID_AMD_STD, + .nr_regions = 1, .regions = { ERASEINFO(0x10000,8), } @@ -1630,12 +1502,11 @@ static const struct amd_flash_info jedec_table[] = { .mfr_id = MANUFACTURER_ST, .dev_id = M50FW040, .name = "ST M50FW040", - .uaddr = { - [0] = MTD_UADDR_UNNECESSARY, /* x8 */ - }, - .DevSize = SIZE_512KiB, - .CmdSet = P_ID_INTEL_EXT, - .NumEraseRegions= 1, + .devtypes = CFI_DEVICETYPE_X8, + .uaddr = MTD_UADDR_UNNECESSARY, + .dev_size = SIZE_512KiB, + .cmd_set = P_ID_INTEL_EXT, + .nr_regions = 1, .regions = { ERASEINFO(0x10000,8), } @@ -1643,12 +1514,11 @@ static const struct amd_flash_info jedec_table[] = { .mfr_id = MANUFACTURER_ST, .dev_id = M50FW080, .name = "ST M50FW080", - .uaddr = { - [0] = MTD_UADDR_UNNECESSARY, /* x8 */ - }, - .DevSize = SIZE_1MiB, - .CmdSet = P_ID_INTEL_EXT, - .NumEraseRegions= 1, + .devtypes = CFI_DEVICETYPE_X8, + .uaddr = MTD_UADDR_UNNECESSARY, + .dev_size = SIZE_1MiB, + .cmd_set = P_ID_INTEL_EXT, + .nr_regions = 1, .regions = { ERASEINFO(0x10000,16), } @@ -1656,12 +1526,11 @@ static const struct amd_flash_info jedec_table[] = { .mfr_id = MANUFACTURER_ST, .dev_id = M50FW016, .name = "ST M50FW016", - .uaddr = { - [0] = MTD_UADDR_UNNECESSARY, /* x8 */ - }, - .DevSize = SIZE_2MiB, - .CmdSet = P_ID_INTEL_EXT, - .NumEraseRegions= 1, + .devtypes = CFI_DEVICETYPE_X8, + .uaddr = MTD_UADDR_UNNECESSARY, + .dev_size = SIZE_2MiB, + .cmd_set = P_ID_INTEL_EXT, + .nr_regions = 1, .regions = { ERASEINFO(0x10000,32), } @@ -1669,12 +1538,11 @@ static const struct amd_flash_info jedec_table[] = { .mfr_id = MANUFACTURER_ST, .dev_id = M50LPW080, .name = "ST M50LPW080", - .uaddr = { - [0] = MTD_UADDR_UNNECESSARY, /* x8 */ - }, - .DevSize = SIZE_1MiB, - .CmdSet = P_ID_INTEL_EXT, - .NumEraseRegions= 1, + .devtypes = CFI_DEVICETYPE_X8, + .uaddr = MTD_UADDR_UNNECESSARY, + .dev_size = SIZE_1MiB, + .cmd_set = P_ID_INTEL_EXT, + .nr_regions = 1, .regions = { ERASEINFO(0x10000,16), } @@ -1682,13 +1550,11 @@ static const struct amd_flash_info jedec_table[] = { .mfr_id = MANUFACTURER_TOSHIBA, .dev_id = TC58FVT160, .name = "Toshiba TC58FVT160", - .uaddr = { - [0] = MTD_UADDR_0x0AAA_0x0555, /* x8 */ - [1] = MTD_UADDR_0x0555_0x02AA /* x16 */ - }, - .DevSize = SIZE_2MiB, - .CmdSet = P_ID_AMD_STD, - .NumEraseRegions= 4, + .devtypes = CFI_DEVICETYPE_X16|CFI_DEVICETYPE_X8, + .uaddr = MTD_UADDR_0x0AAA_0x0555, + .dev_size = SIZE_2MiB, + .cmd_set = P_ID_AMD_STD, + .nr_regions = 4, .regions = { ERASEINFO(0x10000,31), ERASEINFO(0x08000,1), @@ -1699,13 +1565,11 @@ static const struct amd_flash_info jedec_table[] = { .mfr_id = MANUFACTURER_TOSHIBA, .dev_id = TC58FVB160, .name = "Toshiba TC58FVB160", - .uaddr = { - [0] = MTD_UADDR_0x0AAA_0x0555, /* x8 */ - [1] = MTD_UADDR_0x0555_0x02AA /* x16 */ - }, - .DevSize = SIZE_2MiB, - .CmdSet = P_ID_AMD_STD, - .NumEraseRegions= 4, + .devtypes = CFI_DEVICETYPE_X16|CFI_DEVICETYPE_X8, + .uaddr = MTD_UADDR_0x0AAA_0x0555, + .dev_size = SIZE_2MiB, + .cmd_set = P_ID_AMD_STD, + .nr_regions = 4, .regions = { ERASEINFO(0x04000,1), ERASEINFO(0x02000,2), @@ -1716,13 +1580,11 @@ static const struct amd_flash_info jedec_table[] = { .mfr_id = MANUFACTURER_TOSHIBA, .dev_id = TC58FVB321, .name = "Toshiba TC58FVB321", - .uaddr = { - [0] = MTD_UADDR_0x0AAA_0x0555, /* x8 */ - [1] = MTD_UADDR_0x0555_0x02AA /* x16 */ - }, - .DevSize = SIZE_4MiB, - .CmdSet = P_ID_AMD_STD, - .NumEraseRegions= 2, + .devtypes = CFI_DEVICETYPE_X16|CFI_DEVICETYPE_X8, + .uaddr = MTD_UADDR_0x0AAA_0x0555, + .dev_size = SIZE_4MiB, + .cmd_set = P_ID_AMD_STD, + .nr_regions = 2, .regions = { ERASEINFO(0x02000,8), ERASEINFO(0x10000,63) @@ -1731,13 +1593,11 @@ static const struct amd_flash_info jedec_table[] = { .mfr_id = MANUFACTURER_TOSHIBA, .dev_id = TC58FVT321, .name = "Toshiba TC58FVT321", - .uaddr = { - [0] = MTD_UADDR_0x0AAA_0x0555, /* x8 */ - [1] = MTD_UADDR_0x0555_0x02AA /* x16 */ - }, - .DevSize = SIZE_4MiB, - .CmdSet = P_ID_AMD_STD, - .NumEraseRegions= 2, + .devtypes = CFI_DEVICETYPE_X16|CFI_DEVICETYPE_X8, + .uaddr = MTD_UADDR_0x0AAA_0x0555, + .dev_size = SIZE_4MiB, + .cmd_set = P_ID_AMD_STD, + .nr_regions = 2, .regions = { ERASEINFO(0x10000,63), ERASEINFO(0x02000,8) @@ -1746,13 +1606,11 @@ static const struct amd_flash_info jedec_table[] = { .mfr_id = MANUFACTURER_TOSHIBA, .dev_id = TC58FVB641, .name = "Toshiba TC58FVB641", - .uaddr = { - [0] = MTD_UADDR_0x0AAA_0x0555, /* x8 */ - [1] = MTD_UADDR_0x0555_0x02AA, /* x16 */ - }, - .DevSize = SIZE_8MiB, - .CmdSet = P_ID_AMD_STD, - .NumEraseRegions= 2, + .devtypes = CFI_DEVICETYPE_X16|CFI_DEVICETYPE_X8, + .uaddr = MTD_UADDR_0x0AAA_0x0555, + .dev_size = SIZE_8MiB, + .cmd_set = P_ID_AMD_STD, + .nr_regions = 2, .regions = { ERASEINFO(0x02000,8), ERASEINFO(0x10000,127) @@ -1761,13 +1619,11 @@ static const struct amd_flash_info jedec_table[] = { .mfr_id = MANUFACTURER_TOSHIBA, .dev_id = TC58FVT641, .name = "Toshiba TC58FVT641", - .uaddr = { - [0] = MTD_UADDR_0x0AAA_0x0555, /* x8 */ - [1] = MTD_UADDR_0x0555_0x02AA, /* x16 */ - }, - .DevSize = SIZE_8MiB, - .CmdSet = P_ID_AMD_STD, - .NumEraseRegions= 2, + .devtypes = CFI_DEVICETYPE_X16|CFI_DEVICETYPE_X8, + .uaddr = MTD_UADDR_0x0AAA_0x0555, + .dev_size = SIZE_8MiB, + .cmd_set = P_ID_AMD_STD, + .nr_regions = 2, .regions = { ERASEINFO(0x10000,127), ERASEINFO(0x02000,8) @@ -1776,12 +1632,11 @@ static const struct amd_flash_info jedec_table[] = { .mfr_id = MANUFACTURER_WINBOND, .dev_id = W49V002A, .name = "Winbond W49V002A", - .uaddr = { - [0] = MTD_UADDR_0x5555_0x2AAA /* x8 */ - }, - .DevSize = SIZE_256KiB, - .CmdSet = P_ID_AMD_STD, - .NumEraseRegions= 4, + .devtypes = CFI_DEVICETYPE_X8, + .uaddr = MTD_UADDR_0x5555_0x2AAA, + .dev_size = SIZE_256KiB, + .cmd_set = P_ID_AMD_STD, + .nr_regions = 4, .regions = { ERASEINFO(0x10000, 3), ERASEINFO(0x08000, 1), @@ -1791,15 +1646,7 @@ static const struct amd_flash_info jedec_table[] = { } }; - -static int cfi_jedec_setup(struct cfi_private *p_cfi, int index); - -static int jedec_probe_chip(struct map_info *map, __u32 base, - unsigned long *chip_map, struct cfi_private *cfi); - -static struct mtd_info *jedec_probe(struct map_info *map); - -static inline u32 jedec_read_mfr(struct map_info *map, __u32 base, +static inline u32 jedec_read_mfr(struct map_info *map, uint32_t base, struct cfi_private *cfi) { map_word result; @@ -1810,7 +1657,7 @@ static inline u32 jedec_read_mfr(struct map_info *map, __u32 base, return result.x[0] & mask; } -static inline u32 jedec_read_id(struct map_info *map, __u32 base, +static inline u32 jedec_read_id(struct map_info *map, uint32_t base, struct cfi_private *cfi) { map_word result; @@ -1821,8 +1668,7 @@ static inline u32 jedec_read_id(struct map_info *map, __u32 base, return result.x[0] & mask; } -static inline void jedec_reset(u32 base, struct map_info *map, - struct cfi_private *cfi) +static void jedec_reset(u32 base, struct map_info *map, struct cfi_private *cfi) { /* Reset */ @@ -1832,7 +1678,7 @@ static inline void jedec_reset(u32 base, struct map_info *map, * 0x2aaa, 0xF0 at 0x5555 this will not affect the AMD chips * as they will ignore the writes and dont care what address * the F0 is written to */ - if(cfi->addr_unlock1) { + if (cfi->addr_unlock1) { DEBUG( MTD_DEBUG_LEVEL3, "reset unlock called %x %x \n", cfi->addr_unlock1,cfi->addr_unlock2); @@ -1841,7 +1687,7 @@ static inline void jedec_reset(u32 base, struct map_info *map, } cfi_send_gen_cmd(0xF0, cfi->addr_unlock1, base, map, cfi, cfi->device_type, NULL); - /* Some misdesigned intel chips do not respond for 0xF0 for a reset, + /* Some misdesigned Intel chips do not respond for 0xF0 for a reset, * so ensure we're in read mode. Send both the Intel and the AMD command * for this. Intel uses 0xff for this, AMD uses 0xff for NOP, so * this should be safe. @@ -1851,42 +1697,20 @@ static inline void jedec_reset(u32 base, struct map_info *map, } -static inline __u8 finfo_uaddr(const struct amd_flash_info *finfo, int device_type) -{ - int uaddr_idx; - __u8 uaddr = MTD_UADDR_NOT_SUPPORTED; - - switch ( device_type ) { - case CFI_DEVICETYPE_X8: uaddr_idx = 0; break; - case CFI_DEVICETYPE_X16: uaddr_idx = 1; break; - case CFI_DEVICETYPE_X32: uaddr_idx = 2; break; - default: - printk(KERN_NOTICE "MTD: %s(): unknown device_type %d\n", - __func__, device_type); - goto uaddr_done; - } - - uaddr = finfo->uaddr[uaddr_idx]; - - if (uaddr != MTD_UADDR_NOT_SUPPORTED ) { - /* ASSERT("The unlock addresses for non-8-bit mode - are bollocks. We don't really need an array."); */ - uaddr = finfo->uaddr[0]; - } - - uaddr_done: - return uaddr; -} - - static int cfi_jedec_setup(struct cfi_private *p_cfi, int index) { int i,num_erase_regions; - __u8 uaddr; + uint8_t uaddr; - printk("Found: %s\n",jedec_table[index].name); + if (! (jedec_table[index].devtypes & p_cfi->device_type)) { + DEBUG(MTD_DEBUG_LEVEL1, "Rejecting potential %s with incompatible %d-bit device type\n", + jedec_table[index].name, 4 * (1<<p_cfi->device_type)); + return 0; + } + + printk(KERN_INFO "Found: %s\n",jedec_table[index].name); - num_erase_regions = jedec_table[index].NumEraseRegions; + num_erase_regions = jedec_table[index].nr_regions; p_cfi->cfiq = kmalloc(sizeof(struct cfi_ident) + num_erase_regions * 4, GFP_KERNEL); if (!p_cfi->cfiq) { @@ -1896,9 +1720,9 @@ static int cfi_jedec_setup(struct cfi_private *p_cfi, int index) memset(p_cfi->cfiq,0,sizeof(struct cfi_ident)); - p_cfi->cfiq->P_ID = jedec_table[index].CmdSet; - p_cfi->cfiq->NumEraseRegions = jedec_table[index].NumEraseRegions; - p_cfi->cfiq->DevSize = jedec_table[index].DevSize; + p_cfi->cfiq->P_ID = jedec_table[index].cmd_set; + p_cfi->cfiq->NumEraseRegions = jedec_table[index].nr_regions; + p_cfi->cfiq->DevSize = jedec_table[index].dev_size; p_cfi->cfi_mode = CFI_MODE_JEDEC; for (i=0; i<num_erase_regions; i++){ @@ -1910,14 +1734,14 @@ static int cfi_jedec_setup(struct cfi_private *p_cfi, int index) p_cfi->mfr = jedec_table[index].mfr_id; p_cfi->id = jedec_table[index].dev_id; - uaddr = finfo_uaddr(&jedec_table[index], p_cfi->device_type); - if ( uaddr == MTD_UADDR_NOT_SUPPORTED ) { - kfree( p_cfi->cfiq ); - return 0; - } + uaddr = jedec_table[index].uaddr; - p_cfi->addr_unlock1 = unlock_addrs[uaddr].addr1; - p_cfi->addr_unlock2 = unlock_addrs[uaddr].addr2; + /* The table has unlock addresses in _bytes_, and we try not to let + our brains explode when we see the datasheets talking about address + lines numbered from A-1 to A18. The CFI table has unlock addresses + in device-words according to the mode the device is connected in */ + p_cfi->addr_unlock1 = unlock_addrs[uaddr].addr1 / p_cfi->device_type; + p_cfi->addr_unlock2 = unlock_addrs[uaddr].addr2 / p_cfi->device_type; return 1; /* ok */ } @@ -1930,14 +1754,14 @@ static int cfi_jedec_setup(struct cfi_private *p_cfi, int index) * be perfect - consequently there should be some module parameters that * could be manually specified to force the chip info. */ -static inline int jedec_match( __u32 base, +static inline int jedec_match( uint32_t base, struct map_info *map, struct cfi_private *cfi, const struct amd_flash_info *finfo ) { int rc = 0; /* failure until all tests pass */ u32 mfr, id; - __u8 uaddr; + uint8_t uaddr; /* * The IDs must match. For X16 and X32 devices operating in @@ -1950,8 +1774,8 @@ static inline int jedec_match( __u32 base, */ switch (cfi->device_type) { case CFI_DEVICETYPE_X8: - mfr = (__u8)finfo->mfr_id; - id = (__u8)finfo->dev_id; + mfr = (uint8_t)finfo->mfr_id; + id = (uint8_t)finfo->dev_id; /* bjd: it seems that if we do this, we can end up * detecting 16bit flashes as an 8bit device, even though @@ -1964,12 +1788,12 @@ static inline int jedec_match( __u32 base, } break; case CFI_DEVICETYPE_X16: - mfr = (__u16)finfo->mfr_id; - id = (__u16)finfo->dev_id; + mfr = (uint16_t)finfo->mfr_id; + id = (uint16_t)finfo->dev_id; break; case CFI_DEVICETYPE_X32: - mfr = (__u16)finfo->mfr_id; - id = (__u32)finfo->dev_id; + mfr = (uint16_t)finfo->mfr_id; + id = (uint32_t)finfo->dev_id; break; default: printk(KERN_WARNING @@ -1984,25 +1808,25 @@ static inline int jedec_match( __u32 base, /* the part size must fit in the memory window */ DEBUG( MTD_DEBUG_LEVEL3, "MTD %s(): Check fit 0x%.8x + 0x%.8x = 0x%.8x\n", - __func__, base, 1 << finfo->DevSize, base + (1 << finfo->DevSize) ); - if ( base + cfi_interleave(cfi) * ( 1 << finfo->DevSize ) > map->size ) { + __func__, base, 1 << finfo->dev_size, base + (1 << finfo->dev_size) ); + if ( base + cfi_interleave(cfi) * ( 1 << finfo->dev_size ) > map->size ) { DEBUG( MTD_DEBUG_LEVEL3, "MTD %s(): 0x%.4x 0x%.4x %dKiB doesn't fit\n", __func__, finfo->mfr_id, finfo->dev_id, - 1 << finfo->DevSize ); + 1 << finfo->dev_size ); goto match_done; } - uaddr = finfo_uaddr(finfo, cfi->device_type); - if ( uaddr == MTD_UADDR_NOT_SUPPORTED ) { + if (! (finfo->devtypes & cfi->device_type)) goto match_done; - } + + uaddr = finfo->uaddr; DEBUG( MTD_DEBUG_LEVEL3, "MTD %s(): check unlock addrs 0x%.4x 0x%.4x\n", __func__, cfi->addr_unlock1, cfi->addr_unlock2 ); if ( MTD_UADDR_UNNECESSARY != uaddr && MTD_UADDR_DONT_CARE != uaddr - && ( unlock_addrs[uaddr].addr1 != cfi->addr_unlock1 || - unlock_addrs[uaddr].addr2 != cfi->addr_unlock2 ) ) { + && ( unlock_addrs[uaddr].addr1 / cfi->device_type != cfi->addr_unlock1 || + unlock_addrs[uaddr].addr2 / cfi->device_type != cfi->addr_unlock2 ) ) { DEBUG( MTD_DEBUG_LEVEL3, "MTD %s(): 0x%.4x 0x%.4x did not match\n", __func__, @@ -2042,7 +1866,7 @@ static inline int jedec_match( __u32 base, * were truly frobbing a real device. */ DEBUG( MTD_DEBUG_LEVEL3, "MTD %s(): return to ID mode\n", __func__ ); - if(cfi->addr_unlock1) { + if (cfi->addr_unlock1) { cfi_send_gen_cmd(0xaa, cfi->addr_unlock1, base, map, cfi, cfi->device_type, NULL); cfi_send_gen_cmd(0x55, cfi->addr_unlock2, base, map, cfi, cfi->device_type, NULL); } @@ -2068,8 +1892,8 @@ static int jedec_probe_chip(struct map_info *map, __u32 base, if (MTD_UADDR_UNNECESSARY == uaddr_idx) return 0; - cfi->addr_unlock1 = unlock_addrs[uaddr_idx].addr1; - cfi->addr_unlock2 = unlock_addrs[uaddr_idx].addr2; + cfi->addr_unlock1 = unlock_addrs[uaddr_idx].addr1 / cfi->device_type; + cfi->addr_unlock2 = unlock_addrs[uaddr_idx].addr2 / cfi->device_type; } /* Make certain we aren't probing past the end of map */ @@ -2081,19 +1905,11 @@ static int jedec_probe_chip(struct map_info *map, __u32 base, } /* Ensure the unlock addresses we try stay inside the map */ - probe_offset1 = cfi_build_cmd_addr( - cfi->addr_unlock1, - cfi_interleave(cfi), - cfi->device_type); - probe_offset2 = cfi_build_cmd_addr( - cfi->addr_unlock1, - cfi_interleave(cfi), - cfi->device_type); + probe_offset1 = cfi_build_cmd_addr(cfi->addr_unlock1, cfi_interleave(cfi), cfi->device_type); + probe_offset2 = cfi_build_cmd_addr(cfi->addr_unlock2, cfi_interleave(cfi), cfi->device_type); if ( ((base + probe_offset1 + map_bankwidth(map)) >= map->size) || ((base + probe_offset2 + map_bankwidth(map)) >= map->size)) - { goto retry; - } /* Reset */ jedec_reset(base, map, cfi); @@ -2128,8 +1944,8 @@ static int jedec_probe_chip(struct map_info *map, __u32 base, } goto retry; } else { - __u16 mfr; - __u16 id; + uint16_t mfr; + uint16_t id; /* Make sure it is a chip of the same manufacturer and id */ mfr = jedec_read_mfr(map, base, cfi); diff --git a/drivers/mtd/cmdlinepart.c b/drivers/mtd/cmdlinepart.c index 23fab14f1637..b44292abd9f7 100644 --- a/drivers/mtd/cmdlinepart.c +++ b/drivers/mtd/cmdlinepart.c @@ -9,7 +9,7 @@ * * mtdparts=<mtddef>[;<mtddef] * <mtddef> := <mtd-id>:<partdef>[,<partdef>] - * <partdef> := <size>[@offset][<name>][ro] + * <partdef> := <size>[@offset][<name>][ro][lk] * <mtd-id> := unique name used in mapping driver/device (mtd->name) * <size> := standard linux memsize OR "-" to denote all remaining space * <name> := '(' NAME ')' @@ -143,6 +143,13 @@ static struct mtd_partition * newpart(char *s, s += 2; } + /* if lk is found do NOT unlock the MTD partition*/ + if (strncmp(s, "lk", 2) == 0) + { + mask_flags |= MTD_POWERUP_LOCK; + s += 2; + } + /* test if more partitions are following */ if (*s == ',') { diff --git a/drivers/mtd/devices/doc2000.c b/drivers/mtd/devices/doc2000.c index 90acf57c19bd..846989f292e3 100644 --- a/drivers/mtd/devices/doc2000.c +++ b/drivers/mtd/devices/doc2000.c @@ -632,7 +632,7 @@ static int doc_read(struct mtd_info *mtd, loff_t from, size_t len, len = ((from | 0x1ff) + 1) - from; /* The ECC will not be calculated correctly if less than 512 is read */ - if (len != 0x200 && eccbuf) + if (len != 0x200) printk(KERN_WARNING "ECC needs a full sector read (adr: %lx size %lx)\n", (long) from, (long) len); @@ -896,7 +896,7 @@ static int doc_write(struct mtd_info *mtd, loff_t to, size_t len, /* Let the caller know we completed it */ *retlen += len; - if (eccbuf) { + { unsigned char x[8]; size_t dummy; int ret; diff --git a/drivers/mtd/devices/doc2001plus.c b/drivers/mtd/devices/doc2001plus.c index 2b30b587c6e8..83be3461658f 100644 --- a/drivers/mtd/devices/doc2001plus.c +++ b/drivers/mtd/devices/doc2001plus.c @@ -748,7 +748,7 @@ static int doc_write(struct mtd_info *mtd, loff_t to, size_t len, WriteDOC(DoC_GetDataOffset(mtd, &fto), docptr, Mplus_FlashCmd); /* On interleaved devices the flags for 2nd half 512 are before data */ - if (eccbuf && before) + if (before) fto -= 2; /* issue the Serial Data In command to initial the Page Program process */ diff --git a/drivers/mtd/devices/lart.c b/drivers/mtd/devices/lart.c index 4ea50a1dda85..99fd210feaec 100644 --- a/drivers/mtd/devices/lart.c +++ b/drivers/mtd/devices/lart.c @@ -323,7 +323,7 @@ static int flash_probe (void) /* put the flash back into command mode */ write32 (DATA_TO_FLASH (READ_ARRAY),0x00000000); - return (manufacturer == FLASH_MANUFACTURER && (devtype == FLASH_DEVICE_16mbit_TOP || FLASH_DEVICE_16mbit_BOTTOM)); + return (manufacturer == FLASH_MANUFACTURER && (devtype == FLASH_DEVICE_16mbit_TOP || devtype == FLASH_DEVICE_16mbit_BOTTOM)); } /* diff --git a/drivers/mtd/devices/mtd_dataflash.c b/drivers/mtd/devices/mtd_dataflash.c index a5ed6d232c35..b35e4813a3a5 100644 --- a/drivers/mtd/devices/mtd_dataflash.c +++ b/drivers/mtd/devices/mtd_dataflash.c @@ -420,7 +420,7 @@ static int dataflash_write(struct mtd_info *mtd, loff_t to, size_t len, status = dataflash_waitready(priv->spi); /* Check result of the compare operation */ - if ((status & (1 << 6)) == 1) { + if (status & (1 << 6)) { printk(KERN_ERR "%s: compare page %u, err %d\n", spi->dev.bus_id, pageaddr, status); remaining = 0; diff --git a/drivers/mtd/maps/Kconfig b/drivers/mtd/maps/Kconfig index a592fc04cf78..12c253664eb2 100644 --- a/drivers/mtd/maps/Kconfig +++ b/drivers/mtd/maps/Kconfig @@ -110,13 +110,6 @@ config MTD_SUN_UFLASH Sun Microsystems boardsets. This driver will require CFI support in the kernel, so if you did not enable CFI previously, do that now. -config MTD_PNC2000 - tristate "CFI Flash device mapped on Photron PNC-2000" - depends on X86 && MTD_CFI && MTD_PARTITIONS - help - PNC-2000 is the name of Network Camera product from PHOTRON - Ltd. in Japan. It uses CFI-compliant flash. - config MTD_SC520CDP tristate "CFI Flash device mapped on AMD SC520 CDP" depends on X86 && MTD_CFI && MTD_CONCAT @@ -576,7 +569,7 @@ config MTD_BAST_MAXSIZE default "4" config MTD_SHARP_SL - bool "ROM mapped on Sharp SL Series" + tristate "ROM mapped on Sharp SL Series" depends on ARCH_PXA help This enables access to the flash chip on the Sharp SL Series of PDAs. diff --git a/drivers/mtd/maps/Makefile b/drivers/mtd/maps/Makefile index 316382a1401b..a9cbe80f99a0 100644 --- a/drivers/mtd/maps/Makefile +++ b/drivers/mtd/maps/Makefile @@ -28,7 +28,6 @@ obj-$(CONFIG_MTD_PHYSMAP) += physmap.o obj-$(CONFIG_MTD_PHYSMAP_OF) += physmap_of.o obj-$(CONFIG_MTD_PMC_MSP_EVM) += pmcmsp-flash.o obj-$(CONFIG_MTD_PMC_MSP_RAMROOT)+= pmcmsp-ramroot.o -obj-$(CONFIG_MTD_PNC2000) += pnc2000.o obj-$(CONFIG_MTD_PCMCIA) += pcmciamtd.o obj-$(CONFIG_MTD_RPXLITE) += rpxlite.o obj-$(CONFIG_MTD_TQM8XXL) += tqm8xxl.o diff --git a/drivers/mtd/maps/physmap.c b/drivers/mtd/maps/physmap.c index 28c5ffd75233..f00e04efbe28 100644 --- a/drivers/mtd/maps/physmap.c +++ b/drivers/mtd/maps/physmap.c @@ -20,11 +20,15 @@ #include <linux/mtd/map.h> #include <linux/mtd/partitions.h> #include <linux/mtd/physmap.h> +#include <linux/mtd/concat.h> #include <asm/io.h> +#define MAX_RESOURCES 4 + struct physmap_flash_info { - struct mtd_info *mtd; - struct map_info map; + struct mtd_info *mtd[MAX_RESOURCES]; + struct mtd_info *cmtd; + struct map_info map[MAX_RESOURCES]; struct resource *res; #ifdef CONFIG_MTD_PARTITIONS int nr_parts; @@ -32,11 +36,11 @@ struct physmap_flash_info { #endif }; - static int physmap_flash_remove(struct platform_device *dev) { struct physmap_flash_info *info; struct physmap_flash_data *physmap_data; + int i; info = platform_get_drvdata(dev); if (info == NULL) @@ -45,24 +49,33 @@ static int physmap_flash_remove(struct platform_device *dev) physmap_data = dev->dev.platform_data; - if (info->mtd != NULL) { +#ifdef CONFIG_MTD_CONCAT + if (info->cmtd != info->mtd[0]) { + del_mtd_device(info->cmtd); + mtd_concat_destroy(info->cmtd); + } +#endif + + for (i = 0; i < MAX_RESOURCES; i++) { + if (info->mtd[i] != NULL) { #ifdef CONFIG_MTD_PARTITIONS - if (info->nr_parts) { - del_mtd_partitions(info->mtd); - kfree(info->parts); - } else if (physmap_data->nr_parts) { - del_mtd_partitions(info->mtd); - } else { - del_mtd_device(info->mtd); - } + if (info->nr_parts) { + del_mtd_partitions(info->mtd[i]); + kfree(info->parts); + } else if (physmap_data->nr_parts) { + del_mtd_partitions(info->mtd[i]); + } else { + del_mtd_device(info->mtd[i]); + } #else - del_mtd_device(info->mtd); + del_mtd_device(info->mtd[i]); #endif - map_destroy(info->mtd); - } + map_destroy(info->mtd[i]); + } - if (info->map.virt != NULL) - iounmap(info->map.virt); + if (info->map[i].virt != NULL) + iounmap(info->map[i].virt); + } if (info->res != NULL) { release_resource(info->res); @@ -82,16 +95,14 @@ static int physmap_flash_probe(struct platform_device *dev) struct physmap_flash_data *physmap_data; struct physmap_flash_info *info; const char **probe_type; - int err; + int err = 0; + int i; + int devices_found = 0; physmap_data = dev->dev.platform_data; if (physmap_data == NULL) return -ENODEV; - printk(KERN_NOTICE "physmap platform flash device: %.8llx at %.8llx\n", - (unsigned long long)(dev->resource->end - dev->resource->start + 1), - (unsigned long long)dev->resource->start); - info = kzalloc(sizeof(struct physmap_flash_info), GFP_KERNEL); if (info == NULL) { err = -ENOMEM; @@ -100,56 +111,83 @@ static int physmap_flash_probe(struct platform_device *dev) platform_set_drvdata(dev, info); - info->res = request_mem_region(dev->resource->start, - dev->resource->end - dev->resource->start + 1, - dev->dev.bus_id); - if (info->res == NULL) { - dev_err(&dev->dev, "Could not reserve memory region\n"); - err = -ENOMEM; - goto err_out; - } + for (i = 0; i < dev->num_resources; i++) { + printk(KERN_NOTICE "physmap platform flash device: %.8llx at %.8llx\n", + (unsigned long long)(dev->resource[i].end - dev->resource[i].start + 1), + (unsigned long long)dev->resource[i].start); + + info->res = request_mem_region(dev->resource[i].start, + dev->resource[i].end - dev->resource[i].start + 1, + dev->dev.bus_id); + if (info->res == NULL) { + dev_err(&dev->dev, "Could not reserve memory region\n"); + err = -ENOMEM; + goto err_out; + } - info->map.name = dev->dev.bus_id; - info->map.phys = dev->resource->start; - info->map.size = dev->resource->end - dev->resource->start + 1; - info->map.bankwidth = physmap_data->width; - info->map.set_vpp = physmap_data->set_vpp; + info->map[i].name = dev->dev.bus_id; + info->map[i].phys = dev->resource[i].start; + info->map[i].size = dev->resource[i].end - dev->resource[i].start + 1; + info->map[i].bankwidth = physmap_data->width; + info->map[i].set_vpp = physmap_data->set_vpp; + + info->map[i].virt = ioremap(info->map[i].phys, info->map[i].size); + if (info->map[i].virt == NULL) { + dev_err(&dev->dev, "Failed to ioremap flash region\n"); + err = EIO; + goto err_out; + } - info->map.virt = ioremap(info->map.phys, info->map.size); - if (info->map.virt == NULL) { - dev_err(&dev->dev, "Failed to ioremap flash region\n"); - err = EIO; - goto err_out; - } + simple_map_init(&info->map[i]); - simple_map_init(&info->map); + probe_type = rom_probe_types; + for (; info->mtd[i] == NULL && *probe_type != NULL; probe_type++) + info->mtd[i] = do_map_probe(*probe_type, &info->map[i]); + if (info->mtd[i] == NULL) { + dev_err(&dev->dev, "map_probe failed\n"); + err = -ENXIO; + goto err_out; + } else { + devices_found++; + } + info->mtd[i]->owner = THIS_MODULE; + } - probe_type = rom_probe_types; - for (; info->mtd == NULL && *probe_type != NULL; probe_type++) - info->mtd = do_map_probe(*probe_type, &info->map); - if (info->mtd == NULL) { - dev_err(&dev->dev, "map_probe failed\n"); + if (devices_found == 1) { + info->cmtd = info->mtd[0]; + } else if (devices_found > 1) { + /* + * We detected multiple devices. Concatenate them together. + */ +#ifdef CONFIG_MTD_CONCAT + info->cmtd = mtd_concat_create(info->mtd, devices_found, dev->dev.bus_id); + if (info->cmtd == NULL) + err = -ENXIO; +#else + printk(KERN_ERR "physmap-flash: multiple devices " + "found but MTD concat support disabled.\n"); err = -ENXIO; - goto err_out; +#endif } - info->mtd->owner = THIS_MODULE; + if (err) + goto err_out; #ifdef CONFIG_MTD_PARTITIONS - err = parse_mtd_partitions(info->mtd, part_probe_types, &info->parts, 0); + err = parse_mtd_partitions(info->cmtd, part_probe_types, &info->parts, 0); if (err > 0) { - add_mtd_partitions(info->mtd, info->parts, err); + add_mtd_partitions(info->cmtd, info->parts, err); return 0; } if (physmap_data->nr_parts) { printk(KERN_NOTICE "Using physmap partition information\n"); - add_mtd_partitions(info->mtd, physmap_data->parts, - physmap_data->nr_parts); + add_mtd_partitions(info->cmtd, physmap_data->parts, + physmap_data->nr_parts); return 0; } #endif - add_mtd_device(info->mtd); + add_mtd_device(info->cmtd); return 0; err_out: @@ -162,9 +200,11 @@ static int physmap_flash_suspend(struct platform_device *dev, pm_message_t state { struct physmap_flash_info *info = platform_get_drvdata(dev); int ret = 0; + int i; if (info) - ret = info->mtd->suspend(info->mtd); + for (i = 0; i < MAX_RESOURCES; i++) + ret |= info->mtd[i]->suspend(info->mtd[i]); return ret; } @@ -172,27 +212,35 @@ static int physmap_flash_suspend(struct platform_device *dev, pm_message_t state static int physmap_flash_resume(struct platform_device *dev) { struct physmap_flash_info *info = platform_get_drvdata(dev); + int i; + if (info) - info->mtd->resume(info->mtd); + for (i = 0; i < MAX_RESOURCES; i++) + info->mtd[i]->resume(info->mtd[i]); return 0; } static void physmap_flash_shutdown(struct platform_device *dev) { struct physmap_flash_info *info = platform_get_drvdata(dev); - if (info && info->mtd->suspend(info->mtd) == 0) - info->mtd->resume(info->mtd); + int i; + + for (i = 0; i < MAX_RESOURCES; i++) + if (info && info->mtd[i]->suspend(info->mtd[i]) == 0) + info->mtd[i]->resume(info->mtd[i]); } +#else +#define physmap_flash_suspend NULL +#define physmap_flash_resume NULL +#define physmap_flash_shutdown NULL #endif static struct platform_driver physmap_flash_driver = { .probe = physmap_flash_probe, .remove = physmap_flash_remove, -#ifdef CONFIG_PM .suspend = physmap_flash_suspend, .resume = physmap_flash_resume, .shutdown = physmap_flash_shutdown, -#endif .driver = { .name = "physmap-flash", }, diff --git a/drivers/mtd/maps/physmap_of.c b/drivers/mtd/maps/physmap_of.c index aeed9ea79714..49acd4171893 100644 --- a/drivers/mtd/maps/physmap_of.c +++ b/drivers/mtd/maps/physmap_of.c @@ -80,64 +80,6 @@ static int parse_obsolete_partitions(struct of_device *dev, return nr_parts; } - -static int __devinit parse_partitions(struct of_flash *info, - struct of_device *dev) -{ - const char *partname; - static const char *part_probe_types[] - = { "cmdlinepart", "RedBoot", NULL }; - struct device_node *dp = dev->node, *pp; - int nr_parts, i; - - /* First look for RedBoot table or partitions on the command - * line, these take precedence over device tree information */ - nr_parts = parse_mtd_partitions(info->mtd, part_probe_types, - &info->parts, 0); - if (nr_parts > 0) { - add_mtd_partitions(info->mtd, info->parts, nr_parts); - return 0; - } - - /* First count the subnodes */ - nr_parts = 0; - for (pp = dp->child; pp; pp = pp->sibling) - nr_parts++; - - if (nr_parts == 0) - return parse_obsolete_partitions(dev, info, dp); - - info->parts = kzalloc(nr_parts * sizeof(*info->parts), - GFP_KERNEL); - if (!info->parts) - return -ENOMEM; - - for (pp = dp->child, i = 0; pp; pp = pp->sibling, i++) { - const u32 *reg; - int len; - - reg = of_get_property(pp, "reg", &len); - if (!reg || (len != 2*sizeof(u32))) { - dev_err(&dev->dev, "Invalid 'reg' on %s\n", - dp->full_name); - kfree(info->parts); - info->parts = NULL; - return -EINVAL; - } - info->parts[i].offset = reg[0]; - info->parts[i].size = reg[1]; - - partname = of_get_property(pp, "label", &len); - if (!partname) - partname = of_get_property(pp, "name", &len); - info->parts[i].name = (char *)partname; - - if (of_get_property(pp, "read-only", &len)) - info->parts[i].mask_flags = MTD_WRITEABLE; - } - - return nr_parts; -} #else /* MTD_PARTITIONS */ #define OF_FLASH_PARTS(info) (0) #define parse_partitions(info, dev) (0) @@ -212,6 +154,10 @@ static struct mtd_info * __devinit obsolete_probe(struct of_device *dev, static int __devinit of_flash_probe(struct of_device *dev, const struct of_device_id *match) { +#ifdef CONFIG_MTD_PARTITIONS + static const char *part_probe_types[] + = { "cmdlinepart", "RedBoot", NULL }; +#endif struct device_node *dp = dev->node; struct resource res; struct of_flash *info; @@ -274,13 +220,33 @@ static int __devinit of_flash_probe(struct of_device *dev, } info->mtd->owner = THIS_MODULE; - err = parse_partitions(info, dev); +#ifdef CONFIG_MTD_PARTITIONS + /* First look for RedBoot table or partitions on the command + * line, these take precedence over device tree information */ + err = parse_mtd_partitions(info->mtd, part_probe_types, + &info->parts, 0); if (err < 0) - goto err_out; + return err; + +#ifdef CONFIG_MTD_OF_PARTS + if (err == 0) { + err = of_mtd_parse_partitions(&dev->dev, info->mtd, + dp, &info->parts); + if (err < 0) + return err; + } +#endif + + if (err == 0) { + err = parse_obsolete_partitions(dev, info, dp); + if (err < 0) + return err; + } if (err > 0) - add_mtd_partitions(info->mtd, OF_FLASH_PARTS(info), err); + add_mtd_partitions(info->mtd, info->parts, err); else +#endif add_mtd_device(info->mtd); return 0; diff --git a/drivers/mtd/maps/pnc2000.c b/drivers/mtd/maps/pnc2000.c deleted file mode 100644 index d7e16c2d5c44..000000000000 --- a/drivers/mtd/maps/pnc2000.c +++ /dev/null @@ -1,93 +0,0 @@ -/* - * pnc2000.c - mapper for Photron PNC-2000 board. - * - * Copyright (C) 2000 Crossnet Co. <info@crossnet.co.jp> - * - * This code is GPL - * - * $Id: pnc2000.c,v 1.18 2005/11/07 11:14:28 gleixner Exp $ - */ - -#include <linux/module.h> -#include <linux/types.h> -#include <linux/kernel.h> -#include <linux/init.h> - -#include <linux/mtd/mtd.h> -#include <linux/mtd/map.h> -#include <linux/mtd/partitions.h> - - -#define WINDOW_ADDR 0xbf000000 -#define WINDOW_SIZE 0x00400000 - -/* - * MAP DRIVER STUFF - */ - - -static struct map_info pnc_map = { - .name = "PNC-2000", - .size = WINDOW_SIZE, - .bankwidth = 4, - .phys = 0xFFFFFFFF, - .virt = (void __iomem *)WINDOW_ADDR, -}; - - -/* - * MTD 'PARTITIONING' STUFF - */ -static struct mtd_partition pnc_partitions[3] = { - { - .name = "PNC-2000 boot firmware", - .size = 0x20000, - .offset = 0 - }, - { - .name = "PNC-2000 kernel", - .size = 0x1a0000, - .offset = 0x20000 - }, - { - .name = "PNC-2000 filesystem", - .size = 0x240000, - .offset = 0x1c0000 - } -}; - -/* - * This is the master MTD device for which all the others are just - * auto-relocating aliases. - */ -static struct mtd_info *mymtd; - -static int __init init_pnc2000(void) -{ - printk(KERN_NOTICE "Photron PNC-2000 flash mapping: %x at %x\n", WINDOW_SIZE, WINDOW_ADDR); - - simple_map_init(&pnc_map); - - mymtd = do_map_probe("cfi_probe", &pnc_map); - if (mymtd) { - mymtd->owner = THIS_MODULE; - return add_mtd_partitions(mymtd, pnc_partitions, 3); - } - - return -ENXIO; -} - -static void __exit cleanup_pnc2000(void) -{ - if (mymtd) { - del_mtd_partitions(mymtd); - map_destroy(mymtd); - } -} - -module_init(init_pnc2000); -module_exit(cleanup_pnc2000); - -MODULE_LICENSE("GPL"); -MODULE_AUTHOR("Crossnet Co. <info@crossnet.co.jp>"); -MODULE_DESCRIPTION("MTD map driver for Photron PNC-2000 board"); diff --git a/drivers/mtd/maps/scb2_flash.c b/drivers/mtd/maps/scb2_flash.c index dcfb85840d1e..0fc5584324e3 100644 --- a/drivers/mtd/maps/scb2_flash.c +++ b/drivers/mtd/maps/scb2_flash.c @@ -79,7 +79,7 @@ scb2_fixup_mtd(struct mtd_info *mtd) struct cfi_private *cfi = map->fldrv_priv; /* barf if this doesn't look right */ - if (cfi->cfiq->InterfaceDesc != 1) { + if (cfi->cfiq->InterfaceDesc != CFI_INTERFACE_X16_ASYNC) { printk(KERN_ERR MODNAME ": unsupported InterfaceDesc: %#x\n", cfi->cfiq->InterfaceDesc); return -1; diff --git a/drivers/mtd/mtd_blkdevs.c b/drivers/mtd/mtd_blkdevs.c index 74d9d30edabd..839eed8430a2 100644 --- a/drivers/mtd/mtd_blkdevs.c +++ b/drivers/mtd/mtd_blkdevs.c @@ -248,9 +248,9 @@ int add_mtd_blktrans_dev(struct mtd_blktrans_dev *new) return -EBUSY; } - mutex_init(&new->lock); list_add_tail(&new->list, &tr->devs); added: + mutex_init(&new->lock); if (!tr->writesect) new->readonly = 1; diff --git a/drivers/mtd/mtdchar.c b/drivers/mtd/mtdchar.c index a0cee86464ca..5d3ac512ce16 100644 --- a/drivers/mtd/mtdchar.c +++ b/drivers/mtd/mtdchar.c @@ -481,6 +481,7 @@ static int mtd_ioctl(struct inode *inode, struct file *file, { struct mtd_oob_buf buf; struct mtd_oob_ops ops; + uint32_t retlen; if(!(file->f_mode & 2)) return -EPERM; @@ -520,8 +521,11 @@ static int mtd_ioctl(struct inode *inode, struct file *file, buf.start &= ~(mtd->oobsize - 1); ret = mtd->write_oob(mtd, buf.start, &ops); - if (copy_to_user(argp + sizeof(uint32_t), &ops.oobretlen, - sizeof(uint32_t))) + if (ops.oobretlen > 0xFFFFFFFFU) + ret = -EOVERFLOW; + retlen = ops.oobretlen; + if (copy_to_user(&((struct mtd_oob_buf *)argp)->length, + &retlen, sizeof(buf.length))) ret = -EFAULT; kfree(ops.oobbuf); diff --git a/drivers/mtd/mtdcore.c b/drivers/mtd/mtdcore.c index 6c2645e28371..f7e7890e5bc6 100644 --- a/drivers/mtd/mtdcore.c +++ b/drivers/mtd/mtdcore.c @@ -61,7 +61,7 @@ int add_mtd_device(struct mtd_info *mtd) /* Some chips always power up locked. Unlock them now */ if ((mtd->flags & MTD_WRITEABLE) - && (mtd->flags & MTD_STUPID_LOCK) && mtd->unlock) { + && (mtd->flags & MTD_POWERUP_LOCK) && mtd->unlock) { if (mtd->unlock(mtd, 0, mtd->size)) printk(KERN_WARNING "%s: unlock failed, " diff --git a/drivers/mtd/mtdoops.c b/drivers/mtd/mtdoops.c index f8af627f0b98..d3cf05012b46 100644 --- a/drivers/mtd/mtdoops.c +++ b/drivers/mtd/mtdoops.c @@ -28,19 +28,26 @@ #include <linux/workqueue.h> #include <linux/sched.h> #include <linux/wait.h> +#include <linux/delay.h> +#include <linux/spinlock.h> +#include <linux/interrupt.h> #include <linux/mtd/mtd.h> #define OOPS_PAGE_SIZE 4096 -static struct mtdoops_context { +struct mtdoops_context { int mtd_index; - struct work_struct work; + struct work_struct work_erase; + struct work_struct work_write; struct mtd_info *mtd; int oops_pages; int nextpage; int nextcount; void *oops_buf; + + /* writecount and disabling ready are spin lock protected */ + spinlock_t writecount_lock; int ready; int writecount; } oops_cxt; @@ -62,10 +69,7 @@ static int mtdoops_erase_block(struct mtd_info *mtd, int offset) erase.mtd = mtd; erase.callback = mtdoops_erase_callback; erase.addr = offset; - if (mtd->erasesize < OOPS_PAGE_SIZE) - erase.len = OOPS_PAGE_SIZE; - else - erase.len = mtd->erasesize; + erase.len = mtd->erasesize; erase.priv = (u_long)&wait_q; set_current_state(TASK_INTERRUPTIBLE); @@ -87,7 +91,7 @@ static int mtdoops_erase_block(struct mtd_info *mtd, int offset) return 0; } -static int mtdoops_inc_counter(struct mtdoops_context *cxt) +static void mtdoops_inc_counter(struct mtdoops_context *cxt) { struct mtd_info *mtd = cxt->mtd; size_t retlen; @@ -103,25 +107,30 @@ static int mtdoops_inc_counter(struct mtdoops_context *cxt) ret = mtd->read(mtd, cxt->nextpage * OOPS_PAGE_SIZE, 4, &retlen, (u_char *) &count); - if ((retlen != 4) || (ret < 0)) { + if ((retlen != 4) || ((ret < 0) && (ret != -EUCLEAN))) { printk(KERN_ERR "mtdoops: Read failure at %d (%td of 4 read)" ", err %d.\n", cxt->nextpage * OOPS_PAGE_SIZE, retlen, ret); - return 1; + schedule_work(&cxt->work_erase); + return; } /* See if we need to erase the next block */ - if (count != 0xffffffff) - return 1; + if (count != 0xffffffff) { + schedule_work(&cxt->work_erase); + return; + } printk(KERN_DEBUG "mtdoops: Ready %d, %d (no erase)\n", cxt->nextpage, cxt->nextcount); cxt->ready = 1; - return 0; } -static void mtdoops_prepare(struct mtdoops_context *cxt) +/* Scheduled work - when we can't proceed without erasing a block */ +static void mtdoops_workfunc_erase(struct work_struct *work) { + struct mtdoops_context *cxt = + container_of(work, struct mtdoops_context, work_erase); struct mtd_info *mtd = cxt->mtd; int i = 0, j, ret, mod; @@ -136,8 +145,14 @@ static void mtdoops_prepare(struct mtdoops_context *cxt) cxt->nextpage = 0; } - while (mtd->block_isbad && - mtd->block_isbad(mtd, cxt->nextpage * OOPS_PAGE_SIZE)) { + while (mtd->block_isbad) { + ret = mtd->block_isbad(mtd, cxt->nextpage * OOPS_PAGE_SIZE); + if (!ret) + break; + if (ret < 0) { + printk(KERN_ERR "mtdoops: block_isbad failed, aborting.\n"); + return; + } badblock: printk(KERN_WARNING "mtdoops: Bad block at %08x\n", cxt->nextpage * OOPS_PAGE_SIZE); @@ -154,34 +169,72 @@ badblock: for (j = 0, ret = -1; (j < 3) && (ret < 0); j++) ret = mtdoops_erase_block(mtd, cxt->nextpage * OOPS_PAGE_SIZE); - if (ret < 0) { - if (mtd->block_markbad) - mtd->block_markbad(mtd, cxt->nextpage * OOPS_PAGE_SIZE); - goto badblock; + if (ret >= 0) { + printk(KERN_DEBUG "mtdoops: Ready %d, %d \n", cxt->nextpage, cxt->nextcount); + cxt->ready = 1; + return; } - printk(KERN_DEBUG "mtdoops: Ready %d, %d \n", cxt->nextpage, cxt->nextcount); + if (mtd->block_markbad && (ret == -EIO)) { + ret = mtd->block_markbad(mtd, cxt->nextpage * OOPS_PAGE_SIZE); + if (ret < 0) { + printk(KERN_ERR "mtdoops: block_markbad failed, aborting.\n"); + return; + } + } + goto badblock; +} - cxt->ready = 1; +static void mtdoops_write(struct mtdoops_context *cxt, int panic) +{ + struct mtd_info *mtd = cxt->mtd; + size_t retlen; + int ret; + + if (cxt->writecount < OOPS_PAGE_SIZE) + memset(cxt->oops_buf + cxt->writecount, 0xff, + OOPS_PAGE_SIZE - cxt->writecount); + + if (panic) + ret = mtd->panic_write(mtd, cxt->nextpage * OOPS_PAGE_SIZE, + OOPS_PAGE_SIZE, &retlen, cxt->oops_buf); + else + ret = mtd->write(mtd, cxt->nextpage * OOPS_PAGE_SIZE, + OOPS_PAGE_SIZE, &retlen, cxt->oops_buf); + + cxt->writecount = 0; + + if ((retlen != OOPS_PAGE_SIZE) || (ret < 0)) + printk(KERN_ERR "mtdoops: Write failure at %d (%td of %d written), err %d.\n", + cxt->nextpage * OOPS_PAGE_SIZE, retlen, OOPS_PAGE_SIZE, ret); + + mtdoops_inc_counter(cxt); } -static void mtdoops_workfunc(struct work_struct *work) + +static void mtdoops_workfunc_write(struct work_struct *work) { struct mtdoops_context *cxt = - container_of(work, struct mtdoops_context, work); + container_of(work, struct mtdoops_context, work_write); - mtdoops_prepare(cxt); -} + mtdoops_write(cxt, 0); +} -static int find_next_position(struct mtdoops_context *cxt) +static void find_next_position(struct mtdoops_context *cxt) { struct mtd_info *mtd = cxt->mtd; - int page, maxpos = 0; + int ret, page, maxpos = 0; u32 count, maxcount = 0xffffffff; size_t retlen; for (page = 0; page < cxt->oops_pages; page++) { - mtd->read(mtd, page * OOPS_PAGE_SIZE, 4, &retlen, (u_char *) &count); + ret = mtd->read(mtd, page * OOPS_PAGE_SIZE, 4, &retlen, (u_char *) &count); + if ((retlen != 4) || ((ret < 0) && (ret != -EUCLEAN))) { + printk(KERN_ERR "mtdoops: Read failure at %d (%td of 4 read)" + ", err %d.\n", page * OOPS_PAGE_SIZE, retlen, ret); + continue; + } + if (count == 0xffffffff) continue; if (maxcount == 0xffffffff) { @@ -205,20 +258,19 @@ static int find_next_position(struct mtdoops_context *cxt) cxt->ready = 1; printk(KERN_DEBUG "mtdoops: Ready %d, %d (first init)\n", cxt->nextpage, cxt->nextcount); - return 0; + return; } cxt->nextpage = maxpos; cxt->nextcount = maxcount; - return mtdoops_inc_counter(cxt); + mtdoops_inc_counter(cxt); } static void mtdoops_notify_add(struct mtd_info *mtd) { struct mtdoops_context *cxt = &oops_cxt; - int ret; if ((mtd->index != cxt->mtd_index) || cxt->mtd_index < 0) return; @@ -229,14 +281,18 @@ static void mtdoops_notify_add(struct mtd_info *mtd) return; } + if (mtd->erasesize < OOPS_PAGE_SIZE) { + printk(KERN_ERR "Eraseblock size of MTD partition %d too small\n", + mtd->index); + return; + } + cxt->mtd = mtd; cxt->oops_pages = mtd->size / OOPS_PAGE_SIZE; - ret = find_next_position(cxt); - if (ret == 1) - mtdoops_prepare(cxt); + find_next_position(cxt); - printk(KERN_DEBUG "mtdoops: Attached to MTD device %d\n", mtd->index); + printk(KERN_INFO "mtdoops: Attached to MTD device %d\n", mtd->index); } static void mtdoops_notify_remove(struct mtd_info *mtd) @@ -254,31 +310,28 @@ static void mtdoops_console_sync(void) { struct mtdoops_context *cxt = &oops_cxt; struct mtd_info *mtd = cxt->mtd; - size_t retlen; - int ret; + unsigned long flags; - if (!cxt->ready || !mtd) + if (!cxt->ready || !mtd || cxt->writecount == 0) return; - if (cxt->writecount == 0) + /* + * Once ready is 0 and we've held the lock no further writes to the + * buffer will happen + */ + spin_lock_irqsave(&cxt->writecount_lock, flags); + if (!cxt->ready) { + spin_unlock_irqrestore(&cxt->writecount_lock, flags); return; - - if (cxt->writecount < OOPS_PAGE_SIZE) - memset(cxt->oops_buf + cxt->writecount, 0xff, - OOPS_PAGE_SIZE - cxt->writecount); - - ret = mtd->write(mtd, cxt->nextpage * OOPS_PAGE_SIZE, - OOPS_PAGE_SIZE, &retlen, cxt->oops_buf); + } cxt->ready = 0; - cxt->writecount = 0; - - if ((retlen != OOPS_PAGE_SIZE) || (ret < 0)) - printk(KERN_ERR "mtdoops: Write failure at %d (%td of %d written), err %d.\n", - cxt->nextpage * OOPS_PAGE_SIZE, retlen, OOPS_PAGE_SIZE, ret); + spin_unlock_irqrestore(&cxt->writecount_lock, flags); - ret = mtdoops_inc_counter(cxt); - if (ret == 1) - schedule_work(&cxt->work); + if (mtd->panic_write && in_interrupt()) + /* Interrupt context, we're going to panic so try and log */ + mtdoops_write(cxt, 1); + else + schedule_work(&cxt->work_write); } static void @@ -286,7 +339,7 @@ mtdoops_console_write(struct console *co, const char *s, unsigned int count) { struct mtdoops_context *cxt = co->data; struct mtd_info *mtd = cxt->mtd; - int i; + unsigned long flags; if (!oops_in_progress) { mtdoops_console_sync(); @@ -296,6 +349,13 @@ mtdoops_console_write(struct console *co, const char *s, unsigned int count) if (!cxt->ready || !mtd) return; + /* Locking on writecount ensures sequential writes to the buffer */ + spin_lock_irqsave(&cxt->writecount_lock, flags); + + /* Check ready status didn't change whilst waiting for the lock */ + if (!cxt->ready) + return; + if (cxt->writecount == 0) { u32 *stamp = cxt->oops_buf; *stamp = cxt->nextcount; @@ -305,10 +365,13 @@ mtdoops_console_write(struct console *co, const char *s, unsigned int count) if ((count + cxt->writecount) > OOPS_PAGE_SIZE) count = OOPS_PAGE_SIZE - cxt->writecount; - for (i = 0; i < count; i++, s++) - *((char *)(cxt->oops_buf) + cxt->writecount + i) = *s; + memcpy(cxt->oops_buf + cxt->writecount, s, count); + cxt->writecount += count; - cxt->writecount = cxt->writecount + count; + spin_unlock_irqrestore(&cxt->writecount_lock, flags); + + if (cxt->writecount == OOPS_PAGE_SIZE) + mtdoops_console_sync(); } static int __init mtdoops_console_setup(struct console *co, char *options) @@ -334,7 +397,6 @@ static struct console mtdoops_console = { .write = mtdoops_console_write, .setup = mtdoops_console_setup, .unblank = mtdoops_console_sync, - .flags = CON_PRINTBUFFER, .index = -1, .data = &oops_cxt, }; @@ -347,11 +409,12 @@ static int __init mtdoops_console_init(void) cxt->oops_buf = vmalloc(OOPS_PAGE_SIZE); if (!cxt->oops_buf) { - printk(KERN_ERR "Failed to allocate oops buffer workspace\n"); + printk(KERN_ERR "Failed to allocate mtdoops buffer workspace\n"); return -ENOMEM; } - INIT_WORK(&cxt->work, mtdoops_workfunc); + INIT_WORK(&cxt->work_erase, mtdoops_workfunc_erase); + INIT_WORK(&cxt->work_write, mtdoops_workfunc_write); register_console(&mtdoops_console); register_mtd_user(&mtdoops_notifier); diff --git a/drivers/mtd/mtdpart.c b/drivers/mtd/mtdpart.c index 6174a97d7902..c66902df3171 100644 --- a/drivers/mtd/mtdpart.c +++ b/drivers/mtd/mtdpart.c @@ -151,6 +151,20 @@ static int part_write (struct mtd_info *mtd, loff_t to, size_t len, len, retlen, buf); } +static int part_panic_write (struct mtd_info *mtd, loff_t to, size_t len, + size_t *retlen, const u_char *buf) +{ + struct mtd_part *part = PART(mtd); + if (!(mtd->flags & MTD_WRITEABLE)) + return -EROFS; + if (to >= mtd->size) + len = 0; + else if (to + len > mtd->size) + len = mtd->size - to; + return part->master->panic_write (part->master, to + part->offset, + len, retlen, buf); +} + static int part_write_oob(struct mtd_info *mtd, loff_t to, struct mtd_oob_ops *ops) { @@ -352,6 +366,9 @@ int add_mtd_partitions(struct mtd_info *master, slave->mtd.read = part_read; slave->mtd.write = part_write; + if (master->panic_write) + slave->mtd.panic_write = part_panic_write; + if(master->point && master->unpoint){ slave->mtd.point = part_point; slave->mtd.unpoint = part_unpoint; diff --git a/drivers/mtd/nand/Kconfig b/drivers/mtd/nand/Kconfig index 246d4512f64b..4a3c6759492b 100644 --- a/drivers/mtd/nand/Kconfig +++ b/drivers/mtd/nand/Kconfig @@ -93,7 +93,7 @@ config MTD_NAND_AU1550 config MTD_NAND_BF5XX tristate "Blackfin on-chip NAND Flash Controller driver" - depends on BF54x && MTD_NAND + depends on (BF54x || BF52x) && MTD_NAND help This enables the Blackfin on-chip NAND flash controller @@ -283,6 +283,12 @@ config MTD_NAND_CM_X270 tristate "Support for NAND Flash on CM-X270 modules" depends on MTD_NAND && MACH_ARMCORE +config MTD_NAND_PASEMI + tristate "NAND support for PA Semi PWRficient" + depends on MTD_NAND && PPC_PASEMI + help + Enables support for NAND Flash interface on PA Semi PWRficient + based boards config MTD_NAND_NANDSIM tristate "Support for NAND Flash Simulator" @@ -306,4 +312,22 @@ config MTD_ALAUDA These two (and possibly other) Alauda-based cardreaders for SmartMedia and xD allow raw flash access. +config MTD_NAND_ORION + tristate "NAND Flash support for Marvell Orion SoC" + depends on ARCH_ORION && MTD_NAND + help + This enables the NAND flash controller on Orion machines. + + No board specific support is done by this driver, each board + must advertise a platform_device for the driver to attach. + +config MTD_NAND_FSL_ELBC + tristate "NAND support for Freescale eLBC controllers" + depends on MTD_NAND && PPC_OF + help + Various Freescale chips, including the 8313, include a NAND Flash + Controller Module with built-in hardware ECC capabilities. + Enabling this option will enable you to use this to control + external NAND devices. + endif # MTD_NAND diff --git a/drivers/mtd/nand/Makefile b/drivers/mtd/nand/Makefile index 3ad6c0165da3..80d575eeee96 100644 --- a/drivers/mtd/nand/Makefile +++ b/drivers/mtd/nand/Makefile @@ -29,5 +29,8 @@ obj-$(CONFIG_MTD_NAND_CM_X270) += cmx270_nand.o obj-$(CONFIG_MTD_NAND_BASLER_EXCITE) += excite_nandflash.o obj-$(CONFIG_MTD_NAND_PLATFORM) += plat_nand.o obj-$(CONFIG_MTD_ALAUDA) += alauda.o +obj-$(CONFIG_MTD_NAND_PASEMI) += pasemi_nand.o +obj-$(CONFIG_MTD_NAND_ORION) += orion_nand.o +obj-$(CONFIG_MTD_NAND_FSL_ELBC) += fsl_elbc_nand.o nand-objs := nand_base.o nand_bbt.o diff --git a/drivers/mtd/nand/at91_nand.c b/drivers/mtd/nand/at91_nand.c index b2a5672df6e0..c9fb2acf4056 100644 --- a/drivers/mtd/nand/at91_nand.c +++ b/drivers/mtd/nand/at91_nand.c @@ -156,14 +156,14 @@ static int __init at91_nand_probe(struct platform_device *pdev) } #ifdef CONFIG_MTD_PARTITIONS - if (host->board->partition_info) - partitions = host->board->partition_info(mtd->size, &num_partitions); #ifdef CONFIG_MTD_CMDLINE_PARTS - else { - mtd->name = "at91_nand"; - num_partitions = parse_mtd_partitions(mtd, part_probes, &partitions, 0); - } + mtd->name = "at91_nand"; + num_partitions = parse_mtd_partitions(mtd, part_probes, + &partitions, 0); #endif + if (num_partitions <= 0 && host->board->partition_info) + partitions = host->board->partition_info(mtd->size, + &num_partitions); if ((!partitions) || (num_partitions == 0)) { printk(KERN_ERR "at91_nand: No parititions defined, or unsupported device.\n"); diff --git a/drivers/mtd/nand/bf5xx_nand.c b/drivers/mtd/nand/bf5xx_nand.c index a52f3a737c39..747042ab094a 100644 --- a/drivers/mtd/nand/bf5xx_nand.c +++ b/drivers/mtd/nand/bf5xx_nand.c @@ -74,7 +74,22 @@ static int hardware_ecc = 1; static int hardware_ecc; #endif -static unsigned short bfin_nfc_pin_req[] = {P_NAND_CE, P_NAND_RB, 0}; +static unsigned short bfin_nfc_pin_req[] = + {P_NAND_CE, + P_NAND_RB, + P_NAND_D0, + P_NAND_D1, + P_NAND_D2, + P_NAND_D3, + P_NAND_D4, + P_NAND_D5, + P_NAND_D6, + P_NAND_D7, + P_NAND_WE, + P_NAND_RE, + P_NAND_CLE, + P_NAND_ALE, + 0}; /* * Data structures for bf5xx nand flash controller driver @@ -278,7 +293,6 @@ static int bf5xx_nand_calculate_ecc(struct mtd_info *mtd, u16 ecc0, ecc1; u32 code[2]; u8 *p; - int bytes = 3, i; /* first 4 bytes ECC code for 256 page size */ ecc0 = bfin_read_NFC_ECC0(); @@ -288,19 +302,24 @@ static int bf5xx_nand_calculate_ecc(struct mtd_info *mtd, dev_dbg(info->device, "returning ecc 0x%08x\n", code[0]); + /* first 3 bytes in ecc_code for 256 page size */ + p = (u8 *) code; + memcpy(ecc_code, p, 3); + /* second 4 bytes ECC code for 512 page size */ if (page_size == 512) { ecc0 = bfin_read_NFC_ECC2(); ecc1 = bfin_read_NFC_ECC3(); code[1] = (ecc0 & 0x3FF) | ((ecc1 & 0x3FF) << 11); - bytes = 6; + + /* second 3 bytes in ecc_code for second 256 + * bytes of 512 page size + */ + p = (u8 *) (code + 1); + memcpy((ecc_code + 3), p, 3); dev_dbg(info->device, "returning ecc 0x%08x\n", code[1]); } - p = (u8 *)code; - for (i = 0; i < bytes; i++) - ecc_code[i] = p[i]; - return 0; } @@ -507,12 +526,13 @@ static int bf5xx_nand_dma_init(struct bf5xx_nand_info *info) init_completion(&info->dma_completion); +#ifdef CONFIG_BF54x /* Setup DMAC1 channel mux for NFC which shared with SDH */ val = bfin_read_DMAC1_PERIMUX(); val &= 0xFFFE; bfin_write_DMAC1_PERIMUX(val); SSYNC(); - +#endif /* Request NFC DMA channel */ ret = request_dma(CH_NFC, "BF5XX NFC driver"); if (ret < 0) { @@ -744,9 +764,6 @@ static int bf5xx_nand_resume(struct platform_device *dev) { struct bf5xx_nand_info *info = platform_get_drvdata(dev); - if (info) - bf5xx_nand_hw_init(info); - return 0; } diff --git a/drivers/mtd/nand/cafe_nand.c b/drivers/mtd/nand/cafe_nand.c index 1e811715211a..da6ceaa80ba1 100644 --- a/drivers/mtd/nand/cafe_nand.c +++ b/drivers/mtd/nand/cafe_nand.c @@ -11,6 +11,7 @@ #undef DEBUG #include <linux/mtd/mtd.h> #include <linux/mtd/nand.h> +#include <linux/mtd/partitions.h> #include <linux/rslib.h> #include <linux/pci.h> #include <linux/delay.h> @@ -52,6 +53,7 @@ struct cafe_priv { struct nand_chip nand; + struct mtd_partition *parts; struct pci_dev *pdev; void __iomem *mmio; struct rs_control *rs; @@ -84,6 +86,10 @@ static unsigned int numtimings; static int timing[3]; module_param_array(timing, int, &numtimings, 0644); +#ifdef CONFIG_MTD_PARTITIONS +static const char *part_probes[] = { "RedBoot", NULL }; +#endif + /* Hrm. Why isn't this already conditional on something in the struct device? */ #define cafe_dev_dbg(dev, args...) do { if (debug) dev_dbg(dev, ##args); } while(0) @@ -620,7 +626,9 @@ static int __devinit cafe_nand_probe(struct pci_dev *pdev, { struct mtd_info *mtd; struct cafe_priv *cafe; + struct mtd_partition *parts; uint32_t ctrl; + int nr_parts; int err = 0; /* Very old versions shared the same PCI ident for all three @@ -787,7 +795,18 @@ static int __devinit cafe_nand_probe(struct pci_dev *pdev, goto out_irq; pci_set_drvdata(pdev, mtd); + + /* We register the whole device first, separate from the partitions */ add_mtd_device(mtd); + +#ifdef CONFIG_MTD_PARTITIONS + nr_parts = parse_mtd_partitions(mtd, part_probes, &parts, 0); + if (nr_parts > 0) { + cafe->parts = parts; + dev_info(&cafe->pdev->dev, "%d RedBoot partitions found\n", nr_parts); + add_mtd_partitions(mtd, parts, nr_parts); + } +#endif goto out; out_irq: diff --git a/drivers/mtd/nand/fsl_elbc_nand.c b/drivers/mtd/nand/fsl_elbc_nand.c new file mode 100644 index 000000000000..b025dfe0b274 --- /dev/null +++ b/drivers/mtd/nand/fsl_elbc_nand.c @@ -0,0 +1,1244 @@ +/* Freescale Enhanced Local Bus Controller NAND driver + * + * Copyright (c) 2006-2007 Freescale Semiconductor + * + * Authors: Nick Spence <nick.spence@freescale.com>, + * Scott Wood <scottwood@freescale.com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + */ + +#include <linux/module.h> +#include <linux/types.h> +#include <linux/init.h> +#include <linux/kernel.h> +#include <linux/string.h> +#include <linux/ioport.h> +#include <linux/of_platform.h> +#include <linux/slab.h> +#include <linux/interrupt.h> + +#include <linux/mtd/mtd.h> +#include <linux/mtd/nand.h> +#include <linux/mtd/nand_ecc.h> +#include <linux/mtd/partitions.h> + +#include <asm/io.h> + + +#define MAX_BANKS 8 +#define ERR_BYTE 0xFF /* Value returned for read bytes when read failed */ +#define FCM_TIMEOUT_MSECS 500 /* Maximum number of mSecs to wait for FCM */ + +struct elbc_bank { + __be32 br; /**< Base Register */ +#define BR_BA 0xFFFF8000 +#define BR_BA_SHIFT 15 +#define BR_PS 0x00001800 +#define BR_PS_SHIFT 11 +#define BR_PS_8 0x00000800 /* Port Size 8 bit */ +#define BR_PS_16 0x00001000 /* Port Size 16 bit */ +#define BR_PS_32 0x00001800 /* Port Size 32 bit */ +#define BR_DECC 0x00000600 +#define BR_DECC_SHIFT 9 +#define BR_DECC_OFF 0x00000000 /* HW ECC checking and generation off */ +#define BR_DECC_CHK 0x00000200 /* HW ECC checking on, generation off */ +#define BR_DECC_CHK_GEN 0x00000400 /* HW ECC checking and generation on */ +#define BR_WP 0x00000100 +#define BR_WP_SHIFT 8 +#define BR_MSEL 0x000000E0 +#define BR_MSEL_SHIFT 5 +#define BR_MS_GPCM 0x00000000 /* GPCM */ +#define BR_MS_FCM 0x00000020 /* FCM */ +#define BR_MS_SDRAM 0x00000060 /* SDRAM */ +#define BR_MS_UPMA 0x00000080 /* UPMA */ +#define BR_MS_UPMB 0x000000A0 /* UPMB */ +#define BR_MS_UPMC 0x000000C0 /* UPMC */ +#define BR_V 0x00000001 +#define BR_V_SHIFT 0 +#define BR_RES ~(BR_BA|BR_PS|BR_DECC|BR_WP|BR_MSEL|BR_V) + + __be32 or; /**< Base Register */ +#define OR0 0x5004 +#define OR1 0x500C +#define OR2 0x5014 +#define OR3 0x501C +#define OR4 0x5024 +#define OR5 0x502C +#define OR6 0x5034 +#define OR7 0x503C + +#define OR_FCM_AM 0xFFFF8000 +#define OR_FCM_AM_SHIFT 15 +#define OR_FCM_BCTLD 0x00001000 +#define OR_FCM_BCTLD_SHIFT 12 +#define OR_FCM_PGS 0x00000400 +#define OR_FCM_PGS_SHIFT 10 +#define OR_FCM_CSCT 0x00000200 +#define OR_FCM_CSCT_SHIFT 9 +#define OR_FCM_CST 0x00000100 +#define OR_FCM_CST_SHIFT 8 +#define OR_FCM_CHT 0x00000080 +#define OR_FCM_CHT_SHIFT 7 +#define OR_FCM_SCY 0x00000070 +#define OR_FCM_SCY_SHIFT 4 +#define OR_FCM_SCY_1 0x00000010 +#define OR_FCM_SCY_2 0x00000020 +#define OR_FCM_SCY_3 0x00000030 +#define OR_FCM_SCY_4 0x00000040 +#define OR_FCM_SCY_5 0x00000050 +#define OR_FCM_SCY_6 0x00000060 +#define OR_FCM_SCY_7 0x00000070 +#define OR_FCM_RST 0x00000008 +#define OR_FCM_RST_SHIFT 3 +#define OR_FCM_TRLX 0x00000004 +#define OR_FCM_TRLX_SHIFT 2 +#define OR_FCM_EHTR 0x00000002 +#define OR_FCM_EHTR_SHIFT 1 +}; + +struct elbc_regs { + struct elbc_bank bank[8]; + u8 res0[0x28]; + __be32 mar; /**< UPM Address Register */ + u8 res1[0x4]; + __be32 mamr; /**< UPMA Mode Register */ + __be32 mbmr; /**< UPMB Mode Register */ + __be32 mcmr; /**< UPMC Mode Register */ + u8 res2[0x8]; + __be32 mrtpr; /**< Memory Refresh Timer Prescaler Register */ + __be32 mdr; /**< UPM Data Register */ + u8 res3[0x4]; + __be32 lsor; /**< Special Operation Initiation Register */ + __be32 lsdmr; /**< SDRAM Mode Register */ + u8 res4[0x8]; + __be32 lurt; /**< UPM Refresh Timer */ + __be32 lsrt; /**< SDRAM Refresh Timer */ + u8 res5[0x8]; + __be32 ltesr; /**< Transfer Error Status Register */ +#define LTESR_BM 0x80000000 +#define LTESR_FCT 0x40000000 +#define LTESR_PAR 0x20000000 +#define LTESR_WP 0x04000000 +#define LTESR_ATMW 0x00800000 +#define LTESR_ATMR 0x00400000 +#define LTESR_CS 0x00080000 +#define LTESR_CC 0x00000001 +#define LTESR_NAND_MASK (LTESR_FCT | LTESR_PAR | LTESR_CC) + __be32 ltedr; /**< Transfer Error Disable Register */ + __be32 lteir; /**< Transfer Error Interrupt Register */ + __be32 lteatr; /**< Transfer Error Attributes Register */ + __be32 ltear; /**< Transfer Error Address Register */ + u8 res6[0xC]; + __be32 lbcr; /**< Configuration Register */ +#define LBCR_LDIS 0x80000000 +#define LBCR_LDIS_SHIFT 31 +#define LBCR_BCTLC 0x00C00000 +#define LBCR_BCTLC_SHIFT 22 +#define LBCR_AHD 0x00200000 +#define LBCR_LPBSE 0x00020000 +#define LBCR_LPBSE_SHIFT 17 +#define LBCR_EPAR 0x00010000 +#define LBCR_EPAR_SHIFT 16 +#define LBCR_BMT 0x0000FF00 +#define LBCR_BMT_SHIFT 8 +#define LBCR_INIT 0x00040000 + __be32 lcrr; /**< Clock Ratio Register */ +#define LCRR_DBYP 0x80000000 +#define LCRR_DBYP_SHIFT 31 +#define LCRR_BUFCMDC 0x30000000 +#define LCRR_BUFCMDC_SHIFT 28 +#define LCRR_ECL 0x03000000 +#define LCRR_ECL_SHIFT 24 +#define LCRR_EADC 0x00030000 +#define LCRR_EADC_SHIFT 16 +#define LCRR_CLKDIV 0x0000000F +#define LCRR_CLKDIV_SHIFT 0 + u8 res7[0x8]; + __be32 fmr; /**< Flash Mode Register */ +#define FMR_CWTO 0x0000F000 +#define FMR_CWTO_SHIFT 12 +#define FMR_BOOT 0x00000800 +#define FMR_ECCM 0x00000100 +#define FMR_AL 0x00000030 +#define FMR_AL_SHIFT 4 +#define FMR_OP 0x00000003 +#define FMR_OP_SHIFT 0 + __be32 fir; /**< Flash Instruction Register */ +#define FIR_OP0 0xF0000000 +#define FIR_OP0_SHIFT 28 +#define FIR_OP1 0x0F000000 +#define FIR_OP1_SHIFT 24 +#define FIR_OP2 0x00F00000 +#define FIR_OP2_SHIFT 20 +#define FIR_OP3 0x000F0000 +#define FIR_OP3_SHIFT 16 +#define FIR_OP4 0x0000F000 +#define FIR_OP4_SHIFT 12 +#define FIR_OP5 0x00000F00 +#define FIR_OP5_SHIFT 8 +#define FIR_OP6 0x000000F0 +#define FIR_OP6_SHIFT 4 +#define FIR_OP7 0x0000000F +#define FIR_OP7_SHIFT 0 +#define FIR_OP_NOP 0x0 /* No operation and end of sequence */ +#define FIR_OP_CA 0x1 /* Issue current column address */ +#define FIR_OP_PA 0x2 /* Issue current block+page address */ +#define FIR_OP_UA 0x3 /* Issue user defined address */ +#define FIR_OP_CM0 0x4 /* Issue command from FCR[CMD0] */ +#define FIR_OP_CM1 0x5 /* Issue command from FCR[CMD1] */ +#define FIR_OP_CM2 0x6 /* Issue command from FCR[CMD2] */ +#define FIR_OP_CM3 0x7 /* Issue command from FCR[CMD3] */ +#define FIR_OP_WB 0x8 /* Write FBCR bytes from FCM buffer */ +#define FIR_OP_WS 0x9 /* Write 1 or 2 bytes from MDR[AS] */ +#define FIR_OP_RB 0xA /* Read FBCR bytes to FCM buffer */ +#define FIR_OP_RS 0xB /* Read 1 or 2 bytes to MDR[AS] */ +#define FIR_OP_CW0 0xC /* Wait then issue FCR[CMD0] */ +#define FIR_OP_CW1 0xD /* Wait then issue FCR[CMD1] */ +#define FIR_OP_RBW 0xE /* Wait then read FBCR bytes */ +#define FIR_OP_RSW 0xE /* Wait then read 1 or 2 bytes */ + __be32 fcr; /**< Flash Command Register */ +#define FCR_CMD0 0xFF000000 +#define FCR_CMD0_SHIFT 24 +#define FCR_CMD1 0x00FF0000 +#define FCR_CMD1_SHIFT 16 +#define FCR_CMD2 0x0000FF00 +#define FCR_CMD2_SHIFT 8 +#define FCR_CMD3 0x000000FF +#define FCR_CMD3_SHIFT 0 + __be32 fbar; /**< Flash Block Address Register */ +#define FBAR_BLK 0x00FFFFFF + __be32 fpar; /**< Flash Page Address Register */ +#define FPAR_SP_PI 0x00007C00 +#define FPAR_SP_PI_SHIFT 10 +#define FPAR_SP_MS 0x00000200 +#define FPAR_SP_CI 0x000001FF +#define FPAR_SP_CI_SHIFT 0 +#define FPAR_LP_PI 0x0003F000 +#define FPAR_LP_PI_SHIFT 12 +#define FPAR_LP_MS 0x00000800 +#define FPAR_LP_CI 0x000007FF +#define FPAR_LP_CI_SHIFT 0 + __be32 fbcr; /**< Flash Byte Count Register */ +#define FBCR_BC 0x00000FFF + u8 res11[0x8]; + u8 res8[0xF00]; +}; + +struct fsl_elbc_ctrl; + +/* mtd information per set */ + +struct fsl_elbc_mtd { + struct mtd_info mtd; + struct nand_chip chip; + struct fsl_elbc_ctrl *ctrl; + + struct device *dev; + int bank; /* Chip select bank number */ + u8 __iomem *vbase; /* Chip select base virtual address */ + int page_size; /* NAND page size (0=512, 1=2048) */ + unsigned int fmr; /* FCM Flash Mode Register value */ +}; + +/* overview of the fsl elbc controller */ + +struct fsl_elbc_ctrl { + struct nand_hw_control controller; + struct fsl_elbc_mtd *chips[MAX_BANKS]; + + /* device info */ + struct device *dev; + struct elbc_regs __iomem *regs; + int irq; + wait_queue_head_t irq_wait; + unsigned int irq_status; /* status read from LTESR by irq handler */ + u8 __iomem *addr; /* Address of assigned FCM buffer */ + unsigned int page; /* Last page written to / read from */ + unsigned int read_bytes; /* Number of bytes read during command */ + unsigned int column; /* Saved column from SEQIN */ + unsigned int index; /* Pointer to next byte to 'read' */ + unsigned int status; /* status read from LTESR after last op */ + unsigned int mdr; /* UPM/FCM Data Register value */ + unsigned int use_mdr; /* Non zero if the MDR is to be set */ + unsigned int oob; /* Non zero if operating on OOB data */ + char *oob_poi; /* Place to write ECC after read back */ +}; + +/* These map to the positions used by the FCM hardware ECC generator */ + +/* Small Page FLASH with FMR[ECCM] = 0 */ +static struct nand_ecclayout fsl_elbc_oob_sp_eccm0 = { + .eccbytes = 3, + .eccpos = {6, 7, 8}, + .oobfree = { {0, 5}, {9, 7} }, + .oobavail = 12, +}; + +/* Small Page FLASH with FMR[ECCM] = 1 */ +static struct nand_ecclayout fsl_elbc_oob_sp_eccm1 = { + .eccbytes = 3, + .eccpos = {8, 9, 10}, + .oobfree = { {0, 5}, {6, 2}, {11, 5} }, + .oobavail = 12, +}; + +/* Large Page FLASH with FMR[ECCM] = 0 */ +static struct nand_ecclayout fsl_elbc_oob_lp_eccm0 = { + .eccbytes = 12, + .eccpos = {6, 7, 8, 22, 23, 24, 38, 39, 40, 54, 55, 56}, + .oobfree = { {1, 5}, {9, 13}, {25, 13}, {41, 13}, {57, 7} }, + .oobavail = 48, +}; + +/* Large Page FLASH with FMR[ECCM] = 1 */ +static struct nand_ecclayout fsl_elbc_oob_lp_eccm1 = { + .eccbytes = 12, + .eccpos = {8, 9, 10, 24, 25, 26, 40, 41, 42, 56, 57, 58}, + .oobfree = { {1, 7}, {11, 13}, {27, 13}, {43, 13}, {59, 5} }, + .oobavail = 48, +}; + +/*=================================*/ + +/* + * Set up the FCM hardware block and page address fields, and the fcm + * structure addr field to point to the correct FCM buffer in memory + */ +static void set_addr(struct mtd_info *mtd, int column, int page_addr, int oob) +{ + struct nand_chip *chip = mtd->priv; + struct fsl_elbc_mtd *priv = chip->priv; + struct fsl_elbc_ctrl *ctrl = priv->ctrl; + struct elbc_regs __iomem *lbc = ctrl->regs; + int buf_num; + + ctrl->page = page_addr; + + out_be32(&lbc->fbar, + page_addr >> (chip->phys_erase_shift - chip->page_shift)); + + if (priv->page_size) { + out_be32(&lbc->fpar, + ((page_addr << FPAR_LP_PI_SHIFT) & FPAR_LP_PI) | + (oob ? FPAR_LP_MS : 0) | column); + buf_num = (page_addr & 1) << 2; + } else { + out_be32(&lbc->fpar, + ((page_addr << FPAR_SP_PI_SHIFT) & FPAR_SP_PI) | + (oob ? FPAR_SP_MS : 0) | column); + buf_num = page_addr & 7; + } + + ctrl->addr = priv->vbase + buf_num * 1024; + ctrl->index = column; + + /* for OOB data point to the second half of the buffer */ + if (oob) + ctrl->index += priv->page_size ? 2048 : 512; + + dev_vdbg(ctrl->dev, "set_addr: bank=%d, ctrl->addr=0x%p (0x%p), " + "index %x, pes %d ps %d\n", + buf_num, ctrl->addr, priv->vbase, ctrl->index, + chip->phys_erase_shift, chip->page_shift); +} + +/* + * execute FCM command and wait for it to complete + */ +static int fsl_elbc_run_command(struct mtd_info *mtd) +{ + struct nand_chip *chip = mtd->priv; + struct fsl_elbc_mtd *priv = chip->priv; + struct fsl_elbc_ctrl *ctrl = priv->ctrl; + struct elbc_regs __iomem *lbc = ctrl->regs; + + /* Setup the FMR[OP] to execute without write protection */ + out_be32(&lbc->fmr, priv->fmr | 3); + if (ctrl->use_mdr) + out_be32(&lbc->mdr, ctrl->mdr); + + dev_vdbg(ctrl->dev, + "fsl_elbc_run_command: fmr=%08x fir=%08x fcr=%08x\n", + in_be32(&lbc->fmr), in_be32(&lbc->fir), in_be32(&lbc->fcr)); + dev_vdbg(ctrl->dev, + "fsl_elbc_run_command: fbar=%08x fpar=%08x " + "fbcr=%08x bank=%d\n", + in_be32(&lbc->fbar), in_be32(&lbc->fpar), + in_be32(&lbc->fbcr), priv->bank); + + /* execute special operation */ + out_be32(&lbc->lsor, priv->bank); + + /* wait for FCM complete flag or timeout */ + ctrl->irq_status = 0; + wait_event_timeout(ctrl->irq_wait, ctrl->irq_status, + FCM_TIMEOUT_MSECS * HZ/1000); + ctrl->status = ctrl->irq_status; + + /* store mdr value in case it was needed */ + if (ctrl->use_mdr) + ctrl->mdr = in_be32(&lbc->mdr); + + ctrl->use_mdr = 0; + + dev_vdbg(ctrl->dev, + "fsl_elbc_run_command: stat=%08x mdr=%08x fmr=%08x\n", + ctrl->status, ctrl->mdr, in_be32(&lbc->fmr)); + + /* returns 0 on success otherwise non-zero) */ + return ctrl->status == LTESR_CC ? 0 : -EIO; +} + +static void fsl_elbc_do_read(struct nand_chip *chip, int oob) +{ + struct fsl_elbc_mtd *priv = chip->priv; + struct fsl_elbc_ctrl *ctrl = priv->ctrl; + struct elbc_regs __iomem *lbc = ctrl->regs; + + if (priv->page_size) { + out_be32(&lbc->fir, + (FIR_OP_CW0 << FIR_OP0_SHIFT) | + (FIR_OP_CA << FIR_OP1_SHIFT) | + (FIR_OP_PA << FIR_OP2_SHIFT) | + (FIR_OP_CW1 << FIR_OP3_SHIFT) | + (FIR_OP_RBW << FIR_OP4_SHIFT)); + + out_be32(&lbc->fcr, (NAND_CMD_READ0 << FCR_CMD0_SHIFT) | + (NAND_CMD_READSTART << FCR_CMD1_SHIFT)); + } else { + out_be32(&lbc->fir, + (FIR_OP_CW0 << FIR_OP0_SHIFT) | + (FIR_OP_CA << FIR_OP1_SHIFT) | + (FIR_OP_PA << FIR_OP2_SHIFT) | + (FIR_OP_RBW << FIR_OP3_SHIFT)); + + if (oob) + out_be32(&lbc->fcr, NAND_CMD_READOOB << FCR_CMD0_SHIFT); + else + out_be32(&lbc->fcr, NAND_CMD_READ0 << FCR_CMD0_SHIFT); + } +} + +/* cmdfunc send commands to the FCM */ +static void fsl_elbc_cmdfunc(struct mtd_info *mtd, unsigned int command, + int column, int page_addr) +{ + struct nand_chip *chip = mtd->priv; + struct fsl_elbc_mtd *priv = chip->priv; + struct fsl_elbc_ctrl *ctrl = priv->ctrl; + struct elbc_regs __iomem *lbc = ctrl->regs; + + ctrl->use_mdr = 0; + + /* clear the read buffer */ + ctrl->read_bytes = 0; + if (command != NAND_CMD_PAGEPROG) + ctrl->index = 0; + + switch (command) { + /* READ0 and READ1 read the entire buffer to use hardware ECC. */ + case NAND_CMD_READ1: + column += 256; + + /* fall-through */ + case NAND_CMD_READ0: + dev_dbg(ctrl->dev, + "fsl_elbc_cmdfunc: NAND_CMD_READ0, page_addr:" + " 0x%x, column: 0x%x.\n", page_addr, column); + + + out_be32(&lbc->fbcr, 0); /* read entire page to enable ECC */ + set_addr(mtd, 0, page_addr, 0); + + ctrl->read_bytes = mtd->writesize + mtd->oobsize; + ctrl->index += column; + + fsl_elbc_do_read(chip, 0); + fsl_elbc_run_command(mtd); + return; + + /* READOOB reads only the OOB because no ECC is performed. */ + case NAND_CMD_READOOB: + dev_vdbg(ctrl->dev, + "fsl_elbc_cmdfunc: NAND_CMD_READOOB, page_addr:" + " 0x%x, column: 0x%x.\n", page_addr, column); + + out_be32(&lbc->fbcr, mtd->oobsize - column); + set_addr(mtd, column, page_addr, 1); + + ctrl->read_bytes = mtd->writesize + mtd->oobsize; + + fsl_elbc_do_read(chip, 1); + fsl_elbc_run_command(mtd); + return; + + /* READID must read all 5 possible bytes while CEB is active */ + case NAND_CMD_READID: + dev_vdbg(ctrl->dev, "fsl_elbc_cmdfunc: NAND_CMD_READID.\n"); + + out_be32(&lbc->fir, (FIR_OP_CW0 << FIR_OP0_SHIFT) | + (FIR_OP_UA << FIR_OP1_SHIFT) | + (FIR_OP_RBW << FIR_OP2_SHIFT)); + out_be32(&lbc->fcr, NAND_CMD_READID << FCR_CMD0_SHIFT); + /* 5 bytes for manuf, device and exts */ + out_be32(&lbc->fbcr, 5); + ctrl->read_bytes = 5; + ctrl->use_mdr = 1; + ctrl->mdr = 0; + + set_addr(mtd, 0, 0, 0); + fsl_elbc_run_command(mtd); + return; + + /* ERASE1 stores the block and page address */ + case NAND_CMD_ERASE1: + dev_vdbg(ctrl->dev, + "fsl_elbc_cmdfunc: NAND_CMD_ERASE1, " + "page_addr: 0x%x.\n", page_addr); + set_addr(mtd, 0, page_addr, 0); + return; + + /* ERASE2 uses the block and page address from ERASE1 */ + case NAND_CMD_ERASE2: + dev_vdbg(ctrl->dev, "fsl_elbc_cmdfunc: NAND_CMD_ERASE2.\n"); + + out_be32(&lbc->fir, + (FIR_OP_CW0 << FIR_OP0_SHIFT) | + (FIR_OP_PA << FIR_OP1_SHIFT) | + (FIR_OP_CM1 << FIR_OP2_SHIFT)); + + out_be32(&lbc->fcr, + (NAND_CMD_ERASE1 << FCR_CMD0_SHIFT) | + (NAND_CMD_ERASE2 << FCR_CMD1_SHIFT)); + + out_be32(&lbc->fbcr, 0); + ctrl->read_bytes = 0; + + fsl_elbc_run_command(mtd); + return; + + /* SEQIN sets up the addr buffer and all registers except the length */ + case NAND_CMD_SEQIN: { + __be32 fcr; + dev_vdbg(ctrl->dev, + "fsl_elbc_cmdfunc: NAND_CMD_SEQIN/PAGE_PROG, " + "page_addr: 0x%x, column: 0x%x.\n", + page_addr, column); + + ctrl->column = column; + ctrl->oob = 0; + + fcr = (NAND_CMD_PAGEPROG << FCR_CMD1_SHIFT) | + (NAND_CMD_SEQIN << FCR_CMD2_SHIFT); + + if (priv->page_size) { + out_be32(&lbc->fir, + (FIR_OP_CW0 << FIR_OP0_SHIFT) | + (FIR_OP_CA << FIR_OP1_SHIFT) | + (FIR_OP_PA << FIR_OP2_SHIFT) | + (FIR_OP_WB << FIR_OP3_SHIFT) | + (FIR_OP_CW1 << FIR_OP4_SHIFT)); + + fcr |= NAND_CMD_READ0 << FCR_CMD0_SHIFT; + } else { + out_be32(&lbc->fir, + (FIR_OP_CW0 << FIR_OP0_SHIFT) | + (FIR_OP_CM2 << FIR_OP1_SHIFT) | + (FIR_OP_CA << FIR_OP2_SHIFT) | + (FIR_OP_PA << FIR_OP3_SHIFT) | + (FIR_OP_WB << FIR_OP4_SHIFT) | + (FIR_OP_CW1 << FIR_OP5_SHIFT)); + + if (column >= mtd->writesize) { + /* OOB area --> READOOB */ + column -= mtd->writesize; + fcr |= NAND_CMD_READOOB << FCR_CMD0_SHIFT; + ctrl->oob = 1; + } else if (column < 256) { + /* First 256 bytes --> READ0 */ + fcr |= NAND_CMD_READ0 << FCR_CMD0_SHIFT; + } else { + /* Second 256 bytes --> READ1 */ + fcr |= NAND_CMD_READ1 << FCR_CMD0_SHIFT; + } + } + + out_be32(&lbc->fcr, fcr); + set_addr(mtd, column, page_addr, ctrl->oob); + return; + } + + /* PAGEPROG reuses all of the setup from SEQIN and adds the length */ + case NAND_CMD_PAGEPROG: { + int full_page; + dev_vdbg(ctrl->dev, + "fsl_elbc_cmdfunc: NAND_CMD_PAGEPROG " + "writing %d bytes.\n", ctrl->index); + + /* if the write did not start at 0 or is not a full page + * then set the exact length, otherwise use a full page + * write so the HW generates the ECC. + */ + if (ctrl->oob || ctrl->column != 0 || + ctrl->index != mtd->writesize + mtd->oobsize) { + out_be32(&lbc->fbcr, ctrl->index); + full_page = 0; + } else { + out_be32(&lbc->fbcr, 0); + full_page = 1; + } + + fsl_elbc_run_command(mtd); + + /* Read back the page in order to fill in the ECC for the + * caller. Is this really needed? + */ + if (full_page && ctrl->oob_poi) { + out_be32(&lbc->fbcr, 3); + set_addr(mtd, 6, page_addr, 1); + + ctrl->read_bytes = mtd->writesize + 9; + + fsl_elbc_do_read(chip, 1); + fsl_elbc_run_command(mtd); + + memcpy_fromio(ctrl->oob_poi + 6, + &ctrl->addr[ctrl->index], 3); + ctrl->index += 3; + } + + ctrl->oob_poi = NULL; + return; + } + + /* CMD_STATUS must read the status byte while CEB is active */ + /* Note - it does not wait for the ready line */ + case NAND_CMD_STATUS: + out_be32(&lbc->fir, + (FIR_OP_CM0 << FIR_OP0_SHIFT) | + (FIR_OP_RBW << FIR_OP1_SHIFT)); + out_be32(&lbc->fcr, NAND_CMD_STATUS << FCR_CMD0_SHIFT); + out_be32(&lbc->fbcr, 1); + set_addr(mtd, 0, 0, 0); + ctrl->read_bytes = 1; + + fsl_elbc_run_command(mtd); + + /* The chip always seems to report that it is + * write-protected, even when it is not. + */ + setbits8(ctrl->addr, NAND_STATUS_WP); + return; + + /* RESET without waiting for the ready line */ + case NAND_CMD_RESET: + dev_dbg(ctrl->dev, "fsl_elbc_cmdfunc: NAND_CMD_RESET.\n"); + out_be32(&lbc->fir, FIR_OP_CM0 << FIR_OP0_SHIFT); + out_be32(&lbc->fcr, NAND_CMD_RESET << FCR_CMD0_SHIFT); + fsl_elbc_run_command(mtd); + return; + + default: + dev_err(ctrl->dev, + "fsl_elbc_cmdfunc: error, unsupported command 0x%x.\n", + command); + } +} + +static void fsl_elbc_select_chip(struct mtd_info *mtd, int chip) +{ + /* The hardware does not seem to support multiple + * chips per bank. + */ +} + +/* + * Write buf to the FCM Controller Data Buffer + */ +static void fsl_elbc_write_buf(struct mtd_info *mtd, const u8 *buf, int len) +{ + struct nand_chip *chip = mtd->priv; + struct fsl_elbc_mtd *priv = chip->priv; + struct fsl_elbc_ctrl *ctrl = priv->ctrl; + unsigned int bufsize = mtd->writesize + mtd->oobsize; + + if (len < 0) { + dev_err(ctrl->dev, "write_buf of %d bytes", len); + ctrl->status = 0; + return; + } + + if ((unsigned int)len > bufsize - ctrl->index) { + dev_err(ctrl->dev, + "write_buf beyond end of buffer " + "(%d requested, %u available)\n", + len, bufsize - ctrl->index); + len = bufsize - ctrl->index; + } + + memcpy_toio(&ctrl->addr[ctrl->index], buf, len); + ctrl->index += len; +} + +/* + * read a byte from either the FCM hardware buffer if it has any data left + * otherwise issue a command to read a single byte. + */ +static u8 fsl_elbc_read_byte(struct mtd_info *mtd) +{ + struct nand_chip *chip = mtd->priv; + struct fsl_elbc_mtd *priv = chip->priv; + struct fsl_elbc_ctrl *ctrl = priv->ctrl; + + /* If there are still bytes in the FCM, then use the next byte. */ + if (ctrl->index < ctrl->read_bytes) + return in_8(&ctrl->addr[ctrl->index++]); + + dev_err(ctrl->dev, "read_byte beyond end of buffer\n"); + return ERR_BYTE; +} + +/* + * Read from the FCM Controller Data Buffer + */ +static void fsl_elbc_read_buf(struct mtd_info *mtd, u8 *buf, int len) +{ + struct nand_chip *chip = mtd->priv; + struct fsl_elbc_mtd *priv = chip->priv; + struct fsl_elbc_ctrl *ctrl = priv->ctrl; + int avail; + + if (len < 0) + return; + + avail = min((unsigned int)len, ctrl->read_bytes - ctrl->index); + memcpy_fromio(buf, &ctrl->addr[ctrl->index], avail); + ctrl->index += avail; + + if (len > avail) + dev_err(ctrl->dev, + "read_buf beyond end of buffer " + "(%d requested, %d available)\n", + len, avail); +} + +/* + * Verify buffer against the FCM Controller Data Buffer + */ +static int fsl_elbc_verify_buf(struct mtd_info *mtd, const u_char *buf, int len) +{ + struct nand_chip *chip = mtd->priv; + struct fsl_elbc_mtd *priv = chip->priv; + struct fsl_elbc_ctrl *ctrl = priv->ctrl; + int i; + + if (len < 0) { + dev_err(ctrl->dev, "write_buf of %d bytes", len); + return -EINVAL; + } + + if ((unsigned int)len > ctrl->read_bytes - ctrl->index) { + dev_err(ctrl->dev, + "verify_buf beyond end of buffer " + "(%d requested, %u available)\n", + len, ctrl->read_bytes - ctrl->index); + + ctrl->index = ctrl->read_bytes; + return -EINVAL; + } + + for (i = 0; i < len; i++) + if (in_8(&ctrl->addr[ctrl->index + i]) != buf[i]) + break; + + ctrl->index += len; + return i == len && ctrl->status == LTESR_CC ? 0 : -EIO; +} + +/* This function is called after Program and Erase Operations to + * check for success or failure. + */ +static int fsl_elbc_wait(struct mtd_info *mtd, struct nand_chip *chip) +{ + struct fsl_elbc_mtd *priv = chip->priv; + struct fsl_elbc_ctrl *ctrl = priv->ctrl; + struct elbc_regs __iomem *lbc = ctrl->regs; + + if (ctrl->status != LTESR_CC) + return NAND_STATUS_FAIL; + + /* Use READ_STATUS command, but wait for the device to be ready */ + ctrl->use_mdr = 0; + out_be32(&lbc->fir, + (FIR_OP_CW0 << FIR_OP0_SHIFT) | + (FIR_OP_RBW << FIR_OP1_SHIFT)); + out_be32(&lbc->fcr, NAND_CMD_STATUS << FCR_CMD0_SHIFT); + out_be32(&lbc->fbcr, 1); + set_addr(mtd, 0, 0, 0); + ctrl->read_bytes = 1; + + fsl_elbc_run_command(mtd); + + if (ctrl->status != LTESR_CC) + return NAND_STATUS_FAIL; + + /* The chip always seems to report that it is + * write-protected, even when it is not. + */ + setbits8(ctrl->addr, NAND_STATUS_WP); + return fsl_elbc_read_byte(mtd); +} + +static int fsl_elbc_chip_init_tail(struct mtd_info *mtd) +{ + struct nand_chip *chip = mtd->priv; + struct fsl_elbc_mtd *priv = chip->priv; + struct fsl_elbc_ctrl *ctrl = priv->ctrl; + struct elbc_regs __iomem *lbc = ctrl->regs; + unsigned int al; + + /* calculate FMR Address Length field */ + al = 0; + if (chip->pagemask & 0xffff0000) + al++; + if (chip->pagemask & 0xff000000) + al++; + + /* add to ECCM mode set in fsl_elbc_init */ + priv->fmr |= (12 << FMR_CWTO_SHIFT) | /* Timeout > 12 ms */ + (al << FMR_AL_SHIFT); + + dev_dbg(ctrl->dev, "fsl_elbc_init: nand->numchips = %d\n", + chip->numchips); + dev_dbg(ctrl->dev, "fsl_elbc_init: nand->chipsize = %ld\n", + chip->chipsize); + dev_dbg(ctrl->dev, "fsl_elbc_init: nand->pagemask = %8x\n", + chip->pagemask); + dev_dbg(ctrl->dev, "fsl_elbc_init: nand->chip_delay = %d\n", + chip->chip_delay); + dev_dbg(ctrl->dev, "fsl_elbc_init: nand->badblockpos = %d\n", + chip->badblockpos); + dev_dbg(ctrl->dev, "fsl_elbc_init: nand->chip_shift = %d\n", + chip->chip_shift); + dev_dbg(ctrl->dev, "fsl_elbc_init: nand->page_shift = %d\n", + chip->page_shift); + dev_dbg(ctrl->dev, "fsl_elbc_init: nand->phys_erase_shift = %d\n", + chip->phys_erase_shift); + dev_dbg(ctrl->dev, "fsl_elbc_init: nand->ecclayout = %p\n", + chip->ecclayout); + dev_dbg(ctrl->dev, "fsl_elbc_init: nand->ecc.mode = %d\n", + chip->ecc.mode); + dev_dbg(ctrl->dev, "fsl_elbc_init: nand->ecc.steps = %d\n", + chip->ecc.steps); + dev_dbg(ctrl->dev, "fsl_elbc_init: nand->ecc.bytes = %d\n", + chip->ecc.bytes); + dev_dbg(ctrl->dev, "fsl_elbc_init: nand->ecc.total = %d\n", + chip->ecc.total); + dev_dbg(ctrl->dev, "fsl_elbc_init: nand->ecc.layout = %p\n", + chip->ecc.layout); + dev_dbg(ctrl->dev, "fsl_elbc_init: mtd->flags = %08x\n", mtd->flags); + dev_dbg(ctrl->dev, "fsl_elbc_init: mtd->size = %d\n", mtd->size); + dev_dbg(ctrl->dev, "fsl_elbc_init: mtd->erasesize = %d\n", + mtd->erasesize); + dev_dbg(ctrl->dev, "fsl_elbc_init: mtd->writesize = %d\n", + mtd->writesize); + dev_dbg(ctrl->dev, "fsl_elbc_init: mtd->oobsize = %d\n", + mtd->oobsize); + + /* adjust Option Register and ECC to match Flash page size */ + if (mtd->writesize == 512) { + priv->page_size = 0; + clrbits32(&lbc->bank[priv->bank].or, ~OR_FCM_PGS); + } else if (mtd->writesize == 2048) { + priv->page_size = 1; + setbits32(&lbc->bank[priv->bank].or, OR_FCM_PGS); + /* adjust ecc setup if needed */ + if ((in_be32(&lbc->bank[priv->bank].br) & BR_DECC) == + BR_DECC_CHK_GEN) { + chip->ecc.size = 512; + chip->ecc.layout = (priv->fmr & FMR_ECCM) ? + &fsl_elbc_oob_lp_eccm1 : + &fsl_elbc_oob_lp_eccm0; + mtd->ecclayout = chip->ecc.layout; + mtd->oobavail = chip->ecc.layout->oobavail; + } + } else { + dev_err(ctrl->dev, + "fsl_elbc_init: page size %d is not supported\n", + mtd->writesize); + return -1; + } + + /* The default u-boot configuration on MPC8313ERDB causes errors; + * more delay is needed. This should be safe for other boards + * as well. + */ + setbits32(&lbc->bank[priv->bank].or, 0x70); + return 0; +} + +static int fsl_elbc_read_page(struct mtd_info *mtd, + struct nand_chip *chip, + uint8_t *buf) +{ + fsl_elbc_read_buf(mtd, buf, mtd->writesize); + fsl_elbc_read_buf(mtd, chip->oob_poi, mtd->oobsize); + + if (fsl_elbc_wait(mtd, chip) & NAND_STATUS_FAIL) + mtd->ecc_stats.failed++; + + return 0; +} + +/* ECC will be calculated automatically, and errors will be detected in + * waitfunc. + */ +static void fsl_elbc_write_page(struct mtd_info *mtd, + struct nand_chip *chip, + const uint8_t *buf) +{ + struct fsl_elbc_mtd *priv = chip->priv; + struct fsl_elbc_ctrl *ctrl = priv->ctrl; + + fsl_elbc_write_buf(mtd, buf, mtd->writesize); + fsl_elbc_write_buf(mtd, chip->oob_poi, mtd->oobsize); + + ctrl->oob_poi = chip->oob_poi; +} + +static int fsl_elbc_chip_init(struct fsl_elbc_mtd *priv) +{ + struct fsl_elbc_ctrl *ctrl = priv->ctrl; + struct elbc_regs __iomem *lbc = ctrl->regs; + struct nand_chip *chip = &priv->chip; + + dev_dbg(priv->dev, "eLBC Set Information for bank %d\n", priv->bank); + + /* Fill in fsl_elbc_mtd structure */ + priv->mtd.priv = chip; + priv->mtd.owner = THIS_MODULE; + priv->fmr = 0; /* rest filled in later */ + + /* fill in nand_chip structure */ + /* set up function call table */ + chip->read_byte = fsl_elbc_read_byte; + chip->write_buf = fsl_elbc_write_buf; + chip->read_buf = fsl_elbc_read_buf; + chip->verify_buf = fsl_elbc_verify_buf; + chip->select_chip = fsl_elbc_select_chip; + chip->cmdfunc = fsl_elbc_cmdfunc; + chip->waitfunc = fsl_elbc_wait; + + /* set up nand options */ + chip->options = NAND_NO_READRDY | NAND_NO_AUTOINCR; + + chip->controller = &ctrl->controller; + chip->priv = priv; + + chip->ecc.read_page = fsl_elbc_read_page; + chip->ecc.write_page = fsl_elbc_write_page; + + /* If CS Base Register selects full hardware ECC then use it */ + if ((in_be32(&lbc->bank[priv->bank].br) & BR_DECC) == + BR_DECC_CHK_GEN) { + chip->ecc.mode = NAND_ECC_HW; + /* put in small page settings and adjust later if needed */ + chip->ecc.layout = (priv->fmr & FMR_ECCM) ? + &fsl_elbc_oob_sp_eccm1 : &fsl_elbc_oob_sp_eccm0; + chip->ecc.size = 512; + chip->ecc.bytes = 3; + } else { + /* otherwise fall back to default software ECC */ + chip->ecc.mode = NAND_ECC_SOFT; + } + + return 0; +} + +static int fsl_elbc_chip_remove(struct fsl_elbc_mtd *priv) +{ + struct fsl_elbc_ctrl *ctrl = priv->ctrl; + + nand_release(&priv->mtd); + + if (priv->vbase) + iounmap(priv->vbase); + + ctrl->chips[priv->bank] = NULL; + kfree(priv); + + return 0; +} + +static int fsl_elbc_chip_probe(struct fsl_elbc_ctrl *ctrl, + struct device_node *node) +{ + struct elbc_regs __iomem *lbc = ctrl->regs; + struct fsl_elbc_mtd *priv; + struct resource res; +#ifdef CONFIG_MTD_PARTITIONS + static const char *part_probe_types[] + = { "cmdlinepart", "RedBoot", NULL }; + struct mtd_partition *parts; +#endif + int ret; + int bank; + + /* get, allocate and map the memory resource */ + ret = of_address_to_resource(node, 0, &res); + if (ret) { + dev_err(ctrl->dev, "failed to get resource\n"); + return ret; + } + + /* find which chip select it is connected to */ + for (bank = 0; bank < MAX_BANKS; bank++) + if ((in_be32(&lbc->bank[bank].br) & BR_V) && + (in_be32(&lbc->bank[bank].br) & BR_MSEL) == BR_MS_FCM && + (in_be32(&lbc->bank[bank].br) & + in_be32(&lbc->bank[bank].or) & BR_BA) + == res.start) + break; + + if (bank >= MAX_BANKS) { + dev_err(ctrl->dev, "address did not match any chip selects\n"); + return -ENODEV; + } + + priv = kzalloc(sizeof(*priv), GFP_KERNEL); + if (!priv) + return -ENOMEM; + + ctrl->chips[bank] = priv; + priv->bank = bank; + priv->ctrl = ctrl; + priv->dev = ctrl->dev; + + priv->vbase = ioremap(res.start, res.end - res.start + 1); + if (!priv->vbase) { + dev_err(ctrl->dev, "failed to map chip region\n"); + ret = -ENOMEM; + goto err; + } + + ret = fsl_elbc_chip_init(priv); + if (ret) + goto err; + + ret = nand_scan_ident(&priv->mtd, 1); + if (ret) + goto err; + + ret = fsl_elbc_chip_init_tail(&priv->mtd); + if (ret) + goto err; + + ret = nand_scan_tail(&priv->mtd); + if (ret) + goto err; + +#ifdef CONFIG_MTD_PARTITIONS + /* First look for RedBoot table or partitions on the command + * line, these take precedence over device tree information */ + ret = parse_mtd_partitions(&priv->mtd, part_probe_types, &parts, 0); + if (ret < 0) + goto err; + +#ifdef CONFIG_MTD_OF_PARTS + if (ret == 0) { + ret = of_mtd_parse_partitions(priv->dev, &priv->mtd, + node, &parts); + if (ret < 0) + goto err; + } +#endif + + if (ret > 0) + add_mtd_partitions(&priv->mtd, parts, ret); + else +#endif + add_mtd_device(&priv->mtd); + + printk(KERN_INFO "eLBC NAND device at 0x%zx, bank %d\n", + res.start, priv->bank); + return 0; + +err: + fsl_elbc_chip_remove(priv); + return ret; +} + +static int __devinit fsl_elbc_ctrl_init(struct fsl_elbc_ctrl *ctrl) +{ + struct elbc_regs __iomem *lbc = ctrl->regs; + + /* clear event registers */ + setbits32(&lbc->ltesr, LTESR_NAND_MASK); + out_be32(&lbc->lteatr, 0); + + /* Enable interrupts for any detected events */ + out_be32(&lbc->lteir, LTESR_NAND_MASK); + + ctrl->read_bytes = 0; + ctrl->index = 0; + ctrl->addr = NULL; + + return 0; +} + +static int __devexit fsl_elbc_ctrl_remove(struct of_device *ofdev) +{ + struct fsl_elbc_ctrl *ctrl = dev_get_drvdata(&ofdev->dev); + int i; + + for (i = 0; i < MAX_BANKS; i++) + if (ctrl->chips[i]) + fsl_elbc_chip_remove(ctrl->chips[i]); + + if (ctrl->irq) + free_irq(ctrl->irq, ctrl); + + if (ctrl->regs) + iounmap(ctrl->regs); + + dev_set_drvdata(&ofdev->dev, NULL); + kfree(ctrl); + return 0; +} + +/* NOTE: This interrupt is also used to report other localbus events, + * such as transaction errors on other chipselects. If we want to + * capture those, we'll need to move the IRQ code into a shared + * LBC driver. + */ + +static irqreturn_t fsl_elbc_ctrl_irq(int irqno, void *data) +{ + struct fsl_elbc_ctrl *ctrl = data; + struct elbc_regs __iomem *lbc = ctrl->regs; + __be32 status = in_be32(&lbc->ltesr) & LTESR_NAND_MASK; + + if (status) { + out_be32(&lbc->ltesr, status); + out_be32(&lbc->lteatr, 0); + + ctrl->irq_status = status; + smp_wmb(); + wake_up(&ctrl->irq_wait); + + return IRQ_HANDLED; + } + + return IRQ_NONE; +} + +/* fsl_elbc_ctrl_probe + * + * called by device layer when it finds a device matching + * one our driver can handled. This code allocates all of + * the resources needed for the controller only. The + * resources for the NAND banks themselves are allocated + * in the chip probe function. +*/ + +static int __devinit fsl_elbc_ctrl_probe(struct of_device *ofdev, + const struct of_device_id *match) +{ + struct device_node *child; + struct fsl_elbc_ctrl *ctrl; + int ret; + + ctrl = kzalloc(sizeof(*ctrl), GFP_KERNEL); + if (!ctrl) + return -ENOMEM; + + dev_set_drvdata(&ofdev->dev, ctrl); + + spin_lock_init(&ctrl->controller.lock); + init_waitqueue_head(&ctrl->controller.wq); + init_waitqueue_head(&ctrl->irq_wait); + + ctrl->regs = of_iomap(ofdev->node, 0); + if (!ctrl->regs) { + dev_err(&ofdev->dev, "failed to get memory region\n"); + ret = -ENODEV; + goto err; + } + + ctrl->irq = of_irq_to_resource(ofdev->node, 0, NULL); + if (ctrl->irq == NO_IRQ) { + dev_err(&ofdev->dev, "failed to get irq resource\n"); + ret = -ENODEV; + goto err; + } + + ctrl->dev = &ofdev->dev; + + ret = fsl_elbc_ctrl_init(ctrl); + if (ret < 0) + goto err; + + ret = request_irq(ctrl->irq, fsl_elbc_ctrl_irq, 0, "fsl-elbc", ctrl); + if (ret != 0) { + dev_err(&ofdev->dev, "failed to install irq (%d)\n", + ctrl->irq); + ret = ctrl->irq; + goto err; + } + + for_each_child_of_node(ofdev->node, child) + if (of_device_is_compatible(child, "fsl,elbc-fcm-nand")) + fsl_elbc_chip_probe(ctrl, child); + + return 0; + +err: + fsl_elbc_ctrl_remove(ofdev); + return ret; +} + +static const struct of_device_id fsl_elbc_match[] = { + { + .compatible = "fsl,elbc", + }, + {} +}; + +static struct of_platform_driver fsl_elbc_ctrl_driver = { + .driver = { + .name = "fsl-elbc", + }, + .match_table = fsl_elbc_match, + .probe = fsl_elbc_ctrl_probe, + .remove = __devexit_p(fsl_elbc_ctrl_remove), +}; + +static int __init fsl_elbc_init(void) +{ + return of_register_platform_driver(&fsl_elbc_ctrl_driver); +} + +static void __exit fsl_elbc_exit(void) +{ + of_unregister_platform_driver(&fsl_elbc_ctrl_driver); +} + +module_init(fsl_elbc_init); +module_exit(fsl_elbc_exit); + +MODULE_LICENSE("GPL"); +MODULE_AUTHOR("Freescale"); +MODULE_DESCRIPTION("Freescale Enhanced Local Bus Controller MTD NAND driver"); diff --git a/drivers/mtd/nand/nand_base.c b/drivers/mtd/nand/nand_base.c index ddd4fc019042..7acb1a0e7409 100644 --- a/drivers/mtd/nand/nand_base.c +++ b/drivers/mtd/nand/nand_base.c @@ -2469,8 +2469,12 @@ int nand_scan_tail(struct mtd_info *mtd) chip->ecc.write_oob = nand_write_oob_std; case NAND_ECC_HW_SYNDROME: - if (!chip->ecc.calculate || !chip->ecc.correct || - !chip->ecc.hwctl) { + if ((!chip->ecc.calculate || !chip->ecc.correct || + !chip->ecc.hwctl) && + (!chip->ecc.read_page || + chip->ecc.read_page == nand_read_page_hwecc || + !chip->ecc.write_page || + chip->ecc.write_page == nand_write_page_hwecc)) { printk(KERN_WARNING "No ECC functions supplied, " "Hardware ECC not possible\n"); BUG(); diff --git a/drivers/mtd/nand/orion_nand.c b/drivers/mtd/nand/orion_nand.c new file mode 100644 index 000000000000..9162cca0182b --- /dev/null +++ b/drivers/mtd/nand/orion_nand.c @@ -0,0 +1,171 @@ +/* + * drivers/mtd/nand/orion_nand.c + * + * NAND support for Marvell Orion SoC platforms + * + * Tzachi Perelstein <tzachi@marvell.com> + * + * This file is licensed under the terms of the GNU General Public + * License version 2. This program is licensed "as is" without any + * warranty of any kind, whether express or implied. + */ + +#include <linux/slab.h> +#include <linux/module.h> +#include <linux/platform_device.h> +#include <linux/mtd/mtd.h> +#include <linux/mtd/nand.h> +#include <linux/mtd/partitions.h> +#include <asm/io.h> +#include <asm/sizes.h> +#include <asm/arch/platform.h> +#include <asm/arch/hardware.h> + +#ifdef CONFIG_MTD_CMDLINE_PARTS +static const char *part_probes[] = { "cmdlinepart", NULL }; +#endif + +static void orion_nand_cmd_ctrl(struct mtd_info *mtd, int cmd, unsigned int ctrl) +{ + struct nand_chip *nc = mtd->priv; + struct orion_nand_data *board = nc->priv; + u32 offs; + + if (cmd == NAND_CMD_NONE) + return; + + if (ctrl & NAND_CLE) + offs = (1 << board->cle); + else if (ctrl & NAND_ALE) + offs = (1 << board->ale); + else + return; + + if (nc->options & NAND_BUSWIDTH_16) + offs <<= 1; + + writeb(cmd, nc->IO_ADDR_W + offs); +} + +static int __init orion_nand_probe(struct platform_device *pdev) +{ + struct mtd_info *mtd; + struct nand_chip *nc; + struct orion_nand_data *board; + void __iomem *io_base; + int ret = 0; +#ifdef CONFIG_MTD_PARTITIONS + struct mtd_partition *partitions = NULL; + int num_part = 0; +#endif + + nc = kzalloc(sizeof(struct nand_chip) + sizeof(struct mtd_info), GFP_KERNEL); + if (!nc) { + printk(KERN_ERR "orion_nand: failed to allocate device structure.\n"); + ret = -ENOMEM; + goto no_res; + } + mtd = (struct mtd_info *)(nc + 1); + + io_base = ioremap(pdev->resource[0].start, + pdev->resource[0].end - pdev->resource[0].start + 1); + if (!io_base) { + printk(KERN_ERR "orion_nand: ioremap failed\n"); + ret = -EIO; + goto no_res; + } + + board = pdev->dev.platform_data; + + mtd->priv = nc; + mtd->owner = THIS_MODULE; + + nc->priv = board; + nc->IO_ADDR_R = nc->IO_ADDR_W = io_base; + nc->cmd_ctrl = orion_nand_cmd_ctrl; + nc->ecc.mode = NAND_ECC_SOFT; + + if (board->width == 16) + nc->options |= NAND_BUSWIDTH_16; + + platform_set_drvdata(pdev, mtd); + + if (nand_scan(mtd, 1)) { + ret = -ENXIO; + goto no_dev; + } + +#ifdef CONFIG_MTD_PARTITIONS +#ifdef CONFIG_MTD_CMDLINE_PARTS + mtd->name = "orion_nand"; + num_part = parse_mtd_partitions(mtd, part_probes, &partitions, 0); +#endif + /* If cmdline partitions have been passed, let them be used */ + if (num_part <= 0) { + num_part = board->nr_parts; + partitions = board->parts; + } + + if (partitions && num_part > 0) + ret = add_mtd_partitions(mtd, partitions, num_part); + else + ret = add_mtd_device(mtd); +#else + ret = add_mtd_device(mtd); +#endif + + if (ret) { + nand_release(mtd); + goto no_dev; + } + + return 0; + +no_dev: + platform_set_drvdata(pdev, NULL); + iounmap(io_base); +no_res: + kfree(nc); + + return ret; +} + +static int __devexit orion_nand_remove(struct platform_device *pdev) +{ + struct mtd_info *mtd = platform_get_drvdata(pdev); + struct nand_chip *nc = mtd->priv; + + nand_release(mtd); + + iounmap(nc->IO_ADDR_W); + + kfree(nc); + + return 0; +} + +static struct platform_driver orion_nand_driver = { + .probe = orion_nand_probe, + .remove = orion_nand_remove, + .driver = { + .name = "orion_nand", + .owner = THIS_MODULE, + }, +}; + +static int __init orion_nand_init(void) +{ + return platform_driver_register(&orion_nand_driver); +} + +static void __exit orion_nand_exit(void) +{ + platform_driver_unregister(&orion_nand_driver); +} + +module_init(orion_nand_init); +module_exit(orion_nand_exit); + +MODULE_LICENSE("GPL"); +MODULE_AUTHOR("Tzachi Perelstein"); +MODULE_DESCRIPTION("NAND glue for Orion platforms"); diff --git a/drivers/mtd/nand/pasemi_nand.c b/drivers/mtd/nand/pasemi_nand.c new file mode 100644 index 000000000000..75c899039023 --- /dev/null +++ b/drivers/mtd/nand/pasemi_nand.c @@ -0,0 +1,243 @@ +/* + * Copyright (C) 2006-2007 PA Semi, Inc + * + * Author: Egor Martovetsky <egor@pasemi.com> + * Maintained by: Olof Johansson <olof@lixom.net> + * + * Driver for the PWRficient onchip NAND flash interface + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + */ + +#undef DEBUG + +#include <linux/slab.h> +#include <linux/init.h> +#include <linux/module.h> +#include <linux/mtd/mtd.h> +#include <linux/mtd/nand.h> +#include <linux/mtd/nand_ecc.h> +#include <linux/of_platform.h> +#include <linux/platform_device.h> +#include <linux/pci.h> + +#include <asm/io.h> + +#define LBICTRL_LPCCTL_NR 0x00004000 +#define CLE_PIN_CTL 15 +#define ALE_PIN_CTL 14 + +static unsigned int lpcctl; +static struct mtd_info *pasemi_nand_mtd; +static const char driver_name[] = "pasemi-nand"; + +static void pasemi_read_buf(struct mtd_info *mtd, u_char *buf, int len) +{ + struct nand_chip *chip = mtd->priv; + + while (len > 0x800) { + memcpy_fromio(buf, chip->IO_ADDR_R, 0x800); + buf += 0x800; + len -= 0x800; + } + memcpy_fromio(buf, chip->IO_ADDR_R, len); +} + +static void pasemi_write_buf(struct mtd_info *mtd, const u_char *buf, int len) +{ + struct nand_chip *chip = mtd->priv; + + while (len > 0x800) { + memcpy_toio(chip->IO_ADDR_R, buf, 0x800); + buf += 0x800; + len -= 0x800; + } + memcpy_toio(chip->IO_ADDR_R, buf, len); +} + +static void pasemi_hwcontrol(struct mtd_info *mtd, int cmd, + unsigned int ctrl) +{ + struct nand_chip *chip = mtd->priv; + + if (cmd == NAND_CMD_NONE) + return; + + if (ctrl & NAND_CLE) + out_8(chip->IO_ADDR_W + (1 << CLE_PIN_CTL), cmd); + else + out_8(chip->IO_ADDR_W + (1 << ALE_PIN_CTL), cmd); + + /* Push out posted writes */ + eieio(); + inl(lpcctl); +} + +int pasemi_device_ready(struct mtd_info *mtd) +{ + return !!(inl(lpcctl) & LBICTRL_LPCCTL_NR); +} + +static int __devinit pasemi_nand_probe(struct of_device *ofdev, + const struct of_device_id *match) +{ + struct pci_dev *pdev; + struct device_node *np = ofdev->node; + struct resource res; + struct nand_chip *chip; + int err = 0; + + err = of_address_to_resource(np, 0, &res); + + if (err) + return -EINVAL; + + /* We only support one device at the moment */ + if (pasemi_nand_mtd) + return -ENODEV; + + pr_debug("pasemi_nand at %lx-%lx\n", res.start, res.end); + + /* Allocate memory for MTD device structure and private data */ + pasemi_nand_mtd = kzalloc(sizeof(struct mtd_info) + + sizeof(struct nand_chip), GFP_KERNEL); + if (!pasemi_nand_mtd) { + printk(KERN_WARNING + "Unable to allocate PASEMI NAND MTD device structure\n"); + err = -ENOMEM; + goto out; + } + + /* Get pointer to private data */ + chip = (struct nand_chip *)&pasemi_nand_mtd[1]; + + /* Link the private data with the MTD structure */ + pasemi_nand_mtd->priv = chip; + pasemi_nand_mtd->owner = THIS_MODULE; + + chip->IO_ADDR_R = of_iomap(np, 0); + chip->IO_ADDR_W = chip->IO_ADDR_R; + + if (!chip->IO_ADDR_R) { + err = -EIO; + goto out_mtd; + } + + pdev = pci_get_device(PCI_VENDOR_ID_PASEMI, 0xa008, NULL); + if (!pdev) { + err = -ENODEV; + goto out_ior; + } + + lpcctl = pci_resource_start(pdev, 0); + + if (!request_region(lpcctl, 4, driver_name)) { + err = -EBUSY; + goto out_ior; + } + + chip->cmd_ctrl = pasemi_hwcontrol; + chip->dev_ready = pasemi_device_ready; + chip->read_buf = pasemi_read_buf; + chip->write_buf = pasemi_write_buf; + chip->chip_delay = 0; + chip->ecc.mode = NAND_ECC_SOFT; + + /* Enable the following for a flash based bad block table */ + chip->options = NAND_USE_FLASH_BBT | NAND_NO_AUTOINCR; + + /* Scan to find existance of the device */ + if (nand_scan(pasemi_nand_mtd, 1)) { + err = -ENXIO; + goto out_lpc; + } + + if (add_mtd_device(pasemi_nand_mtd)) { + printk(KERN_ERR "pasemi_nand: Unable to register MTD device\n"); + err = -ENODEV; + goto out_lpc; + } + + printk(KERN_INFO "PA Semi NAND flash at %08lx, control at I/O %x\n", + res.start, lpcctl); + + return 0; + + out_lpc: + release_region(lpcctl, 4); + out_ior: + iounmap(chip->IO_ADDR_R); + out_mtd: + kfree(pasemi_nand_mtd); + out: + return err; +} + +static int __devexit pasemi_nand_remove(struct of_device *ofdev) +{ + struct nand_chip *chip; + + if (!pasemi_nand_mtd) + return 0; + + chip = pasemi_nand_mtd->priv; + + /* Release resources, unregister device */ + nand_release(pasemi_nand_mtd); + + release_region(lpcctl, 4); + + iounmap(chip->IO_ADDR_R); + + /* Free the MTD device structure */ + kfree(pasemi_nand_mtd); + + pasemi_nand_mtd = NULL; + + return 0; +} + +static struct of_device_id pasemi_nand_match[] = +{ + { + .compatible = "pasemi,localbus-nand", + }, + {}, +}; + +MODULE_DEVICE_TABLE(of, pasemi_nand_match); + +static struct of_platform_driver pasemi_nand_driver = +{ + .name = (char*)driver_name, + .match_table = pasemi_nand_match, + .probe = pasemi_nand_probe, + .remove = pasemi_nand_remove, +}; + +static int __init pasemi_nand_init(void) +{ + return of_register_platform_driver(&pasemi_nand_driver); +} +module_init(pasemi_nand_init); + +static void __exit pasemi_nand_exit(void) +{ + of_unregister_platform_driver(&pasemi_nand_driver); +} +module_exit(pasemi_nand_exit); + +MODULE_LICENSE("GPL"); +MODULE_AUTHOR("Egor Martovetsky <egor@pasemi.com>"); +MODULE_DESCRIPTION("NAND flash interface driver for PA Semi PWRficient"); diff --git a/drivers/mtd/nand/plat_nand.c b/drivers/mtd/nand/plat_nand.c index cd725fc5e813..f6d5c2adc4fd 100644 --- a/drivers/mtd/nand/plat_nand.c +++ b/drivers/mtd/nand/plat_nand.c @@ -110,7 +110,9 @@ out: static int __devexit plat_nand_remove(struct platform_device *pdev) { struct plat_nand_data *data = platform_get_drvdata(pdev); +#ifdef CONFIG_MTD_PARTITIONS struct platform_nand_data *pdata = pdev->dev.platform_data; +#endif nand_release(&data->mtd); #ifdef CONFIG_MTD_PARTITIONS diff --git a/drivers/mtd/nand/s3c2410.c b/drivers/mtd/nand/s3c2410.c index 2bd0737572c6..9260ad947524 100644 --- a/drivers/mtd/nand/s3c2410.c +++ b/drivers/mtd/nand/s3c2410.c @@ -120,6 +120,8 @@ struct s3c2410_nand_info { int sel_bit; int mtd_count; + unsigned long save_nfconf; + enum s3c_cpu_type cpu_type; }; @@ -364,23 +366,21 @@ static int s3c2410_nand_correct_data(struct mtd_info *mtd, u_char *dat, ((diff2 ^ (diff2 >> 1)) & 0x55) == 0x55) { /* calculate the bit position of the error */ - bit = (diff2 >> 2) & 1; - bit |= (diff2 >> 3) & 2; - bit |= (diff2 >> 4) & 4; + bit = ((diff2 >> 3) & 1) | + ((diff2 >> 4) & 2) | + ((diff2 >> 5) & 4); /* calculate the byte position of the error */ - byte = (diff1 << 1) & 0x80; - byte |= (diff1 << 2) & 0x40; - byte |= (diff1 << 3) & 0x20; - byte |= (diff1 << 4) & 0x10; - - byte |= (diff0 >> 3) & 0x08; - byte |= (diff0 >> 2) & 0x04; - byte |= (diff0 >> 1) & 0x02; - byte |= (diff0 >> 0) & 0x01; - - byte |= (diff2 << 8) & 0x100; + byte = ((diff2 << 7) & 0x100) | + ((diff1 << 0) & 0x80) | + ((diff1 << 1) & 0x40) | + ((diff1 << 2) & 0x20) | + ((diff1 << 3) & 0x10) | + ((diff0 >> 4) & 0x08) | + ((diff0 >> 3) & 0x04) | + ((diff0 >> 2) & 0x02) | + ((diff0 >> 1) & 0x01); dev_dbg(info->device, "correcting error bit %d, byte %d\n", bit, byte); @@ -399,7 +399,7 @@ static int s3c2410_nand_correct_data(struct mtd_info *mtd, u_char *dat, if ((diff0 & ~(1<<fls(diff0))) == 0) return 1; - return 0; + return -1; } /* ECC functions @@ -810,6 +810,16 @@ static int s3c24xx_nand_suspend(struct platform_device *dev, pm_message_t pm) struct s3c2410_nand_info *info = platform_get_drvdata(dev); if (info) { + info->save_nfconf = readl(info->regs + S3C2410_NFCONF); + + /* For the moment, we must ensure nFCE is high during + * the time we are suspended. This really should be + * handled by suspending the MTDs we are using, but + * that is currently not the case. */ + + writel(info->save_nfconf | info->sel_bit, + info->regs + S3C2410_NFCONF); + if (!allow_clk_stop(info)) clk_disable(info->clk); } @@ -820,11 +830,19 @@ static int s3c24xx_nand_suspend(struct platform_device *dev, pm_message_t pm) static int s3c24xx_nand_resume(struct platform_device *dev) { struct s3c2410_nand_info *info = platform_get_drvdata(dev); + unsigned long nfconf; if (info) { clk_enable(info->clk); s3c2410_nand_inithw(info, dev); + /* Restore the state of the nFCE line. */ + + nfconf = readl(info->regs + S3C2410_NFCONF); + nfconf &= ~info->sel_bit; + nfconf |= info->save_nfconf & info->sel_bit; + writel(nfconf, info->regs + S3C2410_NFCONF); + if (allow_clk_stop(info)) clk_disable(info->clk); } diff --git a/drivers/mtd/ofpart.c b/drivers/mtd/ofpart.c new file mode 100644 index 000000000000..f86e06934cd8 --- /dev/null +++ b/drivers/mtd/ofpart.c @@ -0,0 +1,74 @@ +/* + * Flash partitions described by the OF (or flattened) device tree + * + * Copyright (C) 2006 MontaVista Software Inc. + * Author: Vitaly Wool <vwool@ru.mvista.com> + * + * Revised to handle newer style flash binding by: + * Copyright (C) 2007 David Gibson, IBM Corporation. + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the + * Free Software Foundation; either version 2 of the License, or (at your + * option) any later version. + */ + +#include <linux/module.h> +#include <linux/init.h> +#include <linux/of.h> +#include <linux/mtd/mtd.h> +#include <linux/mtd/partitions.h> + +int __devinit of_mtd_parse_partitions(struct device *dev, + struct mtd_info *mtd, + struct device_node *node, + struct mtd_partition **pparts) +{ + const char *partname; + struct device_node *pp; + int nr_parts, i; + + /* First count the subnodes */ + pp = NULL; + nr_parts = 0; + while ((pp = of_get_next_child(node, pp))) + nr_parts++; + + if (nr_parts == 0) + return 0; + + *pparts = kzalloc(nr_parts * sizeof(**pparts), GFP_KERNEL); + if (!*pparts) + return -ENOMEM; + + pp = NULL; + i = 0; + while ((pp = of_get_next_child(node, pp))) { + const u32 *reg; + int len; + + reg = of_get_property(pp, "reg", &len); + if (!reg || (len != 2 * sizeof(u32))) { + of_node_put(pp); + dev_err(dev, "Invalid 'reg' on %s\n", node->full_name); + kfree(*pparts); + *pparts = NULL; + return -EINVAL; + } + (*pparts)[i].offset = reg[0]; + (*pparts)[i].size = reg[1]; + + partname = of_get_property(pp, "label", &len); + if (!partname) + partname = of_get_property(pp, "name", &len); + (*pparts)[i].name = (char *)partname; + + if (of_get_property(pp, "read-only", &len)) + (*pparts)[i].mask_flags = MTD_WRITEABLE; + + i++; + } + + return nr_parts; +} +EXPORT_SYMBOL(of_mtd_parse_partitions); diff --git a/drivers/mtd/onenand/onenand_base.c b/drivers/mtd/onenand/onenand_base.c index 1b0b32011415..8d7d21be1541 100644 --- a/drivers/mtd/onenand/onenand_base.c +++ b/drivers/mtd/onenand/onenand_base.c @@ -18,6 +18,7 @@ #include <linux/module.h> #include <linux/init.h> #include <linux/sched.h> +#include <linux/delay.h> #include <linux/interrupt.h> #include <linux/jiffies.h> #include <linux/mtd/mtd.h> @@ -170,6 +171,18 @@ static int onenand_buffer_address(int dataram1, int sectors, int count) } /** + * onenand_get_density - [DEFAULT] Get OneNAND density + * @param dev_id OneNAND device ID + * + * Get OneNAND density from device ID + */ +static inline int onenand_get_density(int dev_id) +{ + int density = dev_id >> ONENAND_DEVICE_DENSITY_SHIFT; + return (density & ONENAND_DEVICE_DENSITY_MASK); +} + +/** * onenand_command - [DEFAULT] Send command to OneNAND device * @param mtd MTD device structure * @param cmd the command to be sent @@ -182,8 +195,7 @@ static int onenand_buffer_address(int dataram1, int sectors, int count) static int onenand_command(struct mtd_info *mtd, int cmd, loff_t addr, size_t len) { struct onenand_chip *this = mtd->priv; - int value, readcmd = 0, block_cmd = 0; - int block, page; + int value, block, page; /* Address translation */ switch (cmd) { @@ -198,7 +210,6 @@ static int onenand_command(struct mtd_info *mtd, int cmd, loff_t addr, size_t le case ONENAND_CMD_ERASE: case ONENAND_CMD_BUFFERRAM: case ONENAND_CMD_OTP_ACCESS: - block_cmd = 1; block = (int) (addr >> this->erase_shift); page = -1; break; @@ -240,11 +251,9 @@ static int onenand_command(struct mtd_info *mtd, int cmd, loff_t addr, size_t le value = onenand_block_address(this, block); this->write_word(value, this->base + ONENAND_REG_START_ADDRESS1); - if (block_cmd) { - /* Select DataRAM for DDP */ - value = onenand_bufferram_address(this, block); - this->write_word(value, this->base + ONENAND_REG_START_ADDRESS2); - } + /* Select DataRAM for DDP */ + value = onenand_bufferram_address(this, block); + this->write_word(value, this->base + ONENAND_REG_START_ADDRESS2); } if (page != -1) { @@ -256,7 +265,6 @@ static int onenand_command(struct mtd_info *mtd, int cmd, loff_t addr, size_t le case ONENAND_CMD_READ: case ONENAND_CMD_READOOB: dataram = ONENAND_SET_NEXT_BUFFERRAM(this); - readcmd = 1; break; default: @@ -273,12 +281,6 @@ static int onenand_command(struct mtd_info *mtd, int cmd, loff_t addr, size_t le /* Write 'BSA, BSC' of DataRAM */ value = onenand_buffer_address(dataram, sectors, count); this->write_word(value, this->base + ONENAND_REG_START_BUFFER); - - if (readcmd) { - /* Select DataRAM for DDP */ - value = onenand_bufferram_address(this, block); - this->write_word(value, this->base + ONENAND_REG_START_ADDRESS2); - } } /* Interrupt clear */ @@ -855,6 +857,8 @@ static int onenand_read_ops_nolock(struct mtd_info *mtd, loff_t from, this->command(mtd, ONENAND_CMD_READ, from, writesize); ret = this->wait(mtd, FL_READING); onenand_update_bufferram(mtd, from, !ret); + if (ret == -EBADMSG) + ret = 0; } } @@ -913,6 +917,8 @@ static int onenand_read_ops_nolock(struct mtd_info *mtd, loff_t from, /* Now wait for load */ ret = this->wait(mtd, FL_READING); onenand_update_bufferram(mtd, from, !ret); + if (ret == -EBADMSG) + ret = 0; } /* @@ -923,12 +929,12 @@ static int onenand_read_ops_nolock(struct mtd_info *mtd, loff_t from, ops->retlen = read; ops->oobretlen = oobread; - if (mtd->ecc_stats.failed - stats.failed) - return -EBADMSG; - if (ret) return ret; + if (mtd->ecc_stats.failed - stats.failed) + return -EBADMSG; + return mtd->ecc_stats.corrected - stats.corrected ? -EUCLEAN : 0; } @@ -944,6 +950,7 @@ static int onenand_read_oob_nolock(struct mtd_info *mtd, loff_t from, struct mtd_oob_ops *ops) { struct onenand_chip *this = mtd->priv; + struct mtd_ecc_stats stats; int read = 0, thislen, column, oobsize; size_t len = ops->ooblen; mtd_oob_mode_t mode = ops->mode; @@ -977,6 +984,8 @@ static int onenand_read_oob_nolock(struct mtd_info *mtd, loff_t from, return -EINVAL; } + stats = mtd->ecc_stats; + while (read < len) { cond_resched(); @@ -988,18 +997,16 @@ static int onenand_read_oob_nolock(struct mtd_info *mtd, loff_t from, onenand_update_bufferram(mtd, from, 0); ret = this->wait(mtd, FL_READING); - /* First copy data and check return value for ECC handling */ + if (ret && ret != -EBADMSG) { + printk(KERN_ERR "onenand_read_oob_nolock: read failed = 0x%x\n", ret); + break; + } if (mode == MTD_OOB_AUTO) onenand_transfer_auto_oob(mtd, buf, column, thislen); else this->read_bufferram(mtd, ONENAND_SPARERAM, buf, column, thislen); - if (ret) { - printk(KERN_ERR "onenand_read_oob_nolock: read failed = 0x%x\n", ret); - break; - } - read += thislen; if (read == len) @@ -1016,7 +1023,14 @@ static int onenand_read_oob_nolock(struct mtd_info *mtd, loff_t from, } ops->oobretlen = read; - return ret; + + if (ret) + return ret; + + if (mtd->ecc_stats.failed - stats.failed) + return -EBADMSG; + + return 0; } /** @@ -1106,12 +1120,10 @@ static int onenand_bbt_wait(struct mtd_info *mtd, int state) interrupt = this->read_word(this->base + ONENAND_REG_INTERRUPT); ctrl = this->read_word(this->base + ONENAND_REG_CTRL_STATUS); + /* Initial bad block case: 0x2400 or 0x0400 */ if (ctrl & ONENAND_CTRL_ERROR) { printk(KERN_DEBUG "onenand_bbt_wait: controller error = 0x%04x\n", ctrl); - /* Initial bad block case */ - if (ctrl & ONENAND_CTRL_LOAD) - return ONENAND_BBT_READ_ERROR; - return ONENAND_BBT_READ_FATAL_ERROR; + return ONENAND_BBT_READ_ERROR; } if (interrupt & ONENAND_INT_READ) { @@ -1206,7 +1218,7 @@ int onenand_bbt_read_oob(struct mtd_info *mtd, loff_t from, static int onenand_verify_oob(struct mtd_info *mtd, const u_char *buf, loff_t to) { struct onenand_chip *this = mtd->priv; - char oobbuf[64]; + u_char *oob_buf = this->oob_buf; int status, i; this->command(mtd, ONENAND_CMD_READOOB, to, mtd->oobsize); @@ -1215,9 +1227,9 @@ static int onenand_verify_oob(struct mtd_info *mtd, const u_char *buf, loff_t to if (status) return status; - this->read_bufferram(mtd, ONENAND_SPARERAM, oobbuf, 0, mtd->oobsize); + this->read_bufferram(mtd, ONENAND_SPARERAM, oob_buf, 0, mtd->oobsize); for (i = 0; i < mtd->oobsize; i++) - if (buf[i] != 0xFF && buf[i] != oobbuf[i]) + if (buf[i] != 0xFF && buf[i] != oob_buf[i]) return -EBADMSG; return 0; @@ -1273,6 +1285,112 @@ static int onenand_verify(struct mtd_info *mtd, const u_char *buf, loff_t addr, #define NOTALIGNED(x) ((x & (this->subpagesize - 1)) != 0) +static void onenand_panic_wait(struct mtd_info *mtd) +{ + struct onenand_chip *this = mtd->priv; + unsigned int interrupt; + int i; + + for (i = 0; i < 2000; i++) { + interrupt = this->read_word(this->base + ONENAND_REG_INTERRUPT); + if (interrupt & ONENAND_INT_MASTER) + break; + udelay(10); + } +} + +/** + * onenand_panic_write - [MTD Interface] write buffer to FLASH in a panic context + * @param mtd MTD device structure + * @param to offset to write to + * @param len number of bytes to write + * @param retlen pointer to variable to store the number of written bytes + * @param buf the data to write + * + * Write with ECC + */ +static int onenand_panic_write(struct mtd_info *mtd, loff_t to, size_t len, + size_t *retlen, const u_char *buf) +{ + struct onenand_chip *this = mtd->priv; + int column, subpage; + int written = 0; + int ret = 0; + + if (this->state == FL_PM_SUSPENDED) + return -EBUSY; + + /* Wait for any existing operation to clear */ + onenand_panic_wait(mtd); + + DEBUG(MTD_DEBUG_LEVEL3, "onenand_panic_write: to = 0x%08x, len = %i\n", + (unsigned int) to, (int) len); + + /* Initialize retlen, in case of early exit */ + *retlen = 0; + + /* Do not allow writes past end of device */ + if (unlikely((to + len) > mtd->size)) { + printk(KERN_ERR "onenand_panic_write: Attempt write to past end of device\n"); + return -EINVAL; + } + + /* Reject writes, which are not page aligned */ + if (unlikely(NOTALIGNED(to)) || unlikely(NOTALIGNED(len))) { + printk(KERN_ERR "onenand_panic_write: Attempt to write not page aligned data\n"); + return -EINVAL; + } + + column = to & (mtd->writesize - 1); + + /* Loop until all data write */ + while (written < len) { + int thislen = min_t(int, mtd->writesize - column, len - written); + u_char *wbuf = (u_char *) buf; + + this->command(mtd, ONENAND_CMD_BUFFERRAM, to, thislen); + + /* Partial page write */ + subpage = thislen < mtd->writesize; + if (subpage) { + memset(this->page_buf, 0xff, mtd->writesize); + memcpy(this->page_buf + column, buf, thislen); + wbuf = this->page_buf; + } + + this->write_bufferram(mtd, ONENAND_DATARAM, wbuf, 0, mtd->writesize); + this->write_bufferram(mtd, ONENAND_SPARERAM, ffchars, 0, mtd->oobsize); + + this->command(mtd, ONENAND_CMD_PROG, to, mtd->writesize); + + onenand_panic_wait(mtd); + + /* In partial page write we don't update bufferram */ + onenand_update_bufferram(mtd, to, !ret && !subpage); + if (ONENAND_IS_2PLANE(this)) { + ONENAND_SET_BUFFERRAM1(this); + onenand_update_bufferram(mtd, to + this->writesize, !ret && !subpage); + } + + if (ret) { + printk(KERN_ERR "onenand_panic_write: write failed %d\n", ret); + break; + } + + written += thislen; + + if (written == len) + break; + + column = 0; + to += thislen; + buf += thislen; + } + + *retlen = written; + return ret; +} + /** * onenand_fill_auto_oob - [Internal] oob auto-placement transfer * @param mtd MTD device structure @@ -1419,7 +1537,7 @@ static int onenand_write_ops_nolock(struct mtd_info *mtd, loff_t to, } /* Only check verify write turn on */ - ret = onenand_verify(mtd, (u_char *) wbuf, to, thislen); + ret = onenand_verify(mtd, buf, to, thislen); if (ret) { printk(KERN_ERR "onenand_write_ops_nolock: verify failed %d\n", ret); break; @@ -1435,9 +1553,6 @@ static int onenand_write_ops_nolock(struct mtd_info *mtd, loff_t to, buf += thislen; } - /* Deselect and wake up anyone waiting on the device */ - onenand_release_device(mtd); - ops->retlen = written; return ret; @@ -2148,7 +2263,7 @@ static int onenand_otp_walk(struct mtd_info *mtd, loff_t from, size_t len, *retlen = 0; - density = this->device_id >> ONENAND_DEVICE_DENSITY_SHIFT; + density = onenand_get_density(this->device_id); if (density < ONENAND_DEVICE_DENSITY_512Mb) otp_pages = 20; else @@ -2299,7 +2414,8 @@ static int onenand_write_user_prot_reg(struct mtd_info *mtd, loff_t from, static int onenand_lock_user_prot_reg(struct mtd_info *mtd, loff_t from, size_t len) { - unsigned char oob_buf[64]; + struct onenand_chip *this = mtd->priv; + u_char *oob_buf = this->oob_buf; size_t retlen; int ret; @@ -2339,7 +2455,7 @@ static void onenand_check_features(struct mtd_info *mtd) unsigned int density, process; /* Lock scheme depends on density and process */ - density = this->device_id >> ONENAND_DEVICE_DENSITY_SHIFT; + density = onenand_get_density(this->device_id); process = this->version_id >> ONENAND_VERSION_PROCESS_SHIFT; /* Lock scheme */ @@ -2388,7 +2504,7 @@ static void onenand_print_device_info(int device, int version) vcc = device & ONENAND_DEVICE_VCC_MASK; demuxed = device & ONENAND_DEVICE_IS_DEMUX; ddp = device & ONENAND_DEVICE_IS_DDP; - density = device >> ONENAND_DEVICE_DENSITY_SHIFT; + density = onenand_get_density(device); printk(KERN_INFO "%sOneNAND%s %dMB %sV 16-bit (0x%02x)\n", demuxed ? "" : "Muxed ", ddp ? "(DDP)" : "", @@ -2480,7 +2596,7 @@ static int onenand_probe(struct mtd_info *mtd) this->device_id = dev_id; this->version_id = ver_id; - density = dev_id >> ONENAND_DEVICE_DENSITY_SHIFT; + density = onenand_get_density(dev_id); this->chipsize = (16 << density) << 20; /* Set density mask. it is used for DDP */ if (ONENAND_IS_DDP(this)) @@ -2664,6 +2780,7 @@ int onenand_scan(struct mtd_info *mtd, int maxchips) mtd->write = onenand_write; mtd->read_oob = onenand_read_oob; mtd->write_oob = onenand_write_oob; + mtd->panic_write = onenand_panic_write; #ifdef CONFIG_MTD_ONENAND_OTP mtd->get_fact_prot_info = onenand_get_fact_prot_info; mtd->read_fact_prot_reg = onenand_read_fact_prot_reg; diff --git a/drivers/mtd/redboot.c b/drivers/mtd/redboot.c index a61351f88ec0..47474903263c 100644 --- a/drivers/mtd/redboot.c +++ b/drivers/mtd/redboot.c @@ -59,16 +59,31 @@ static int parse_redboot_partitions(struct mtd_info *master, static char nullstring[] = "unallocated"; #endif + if ( directory < 0 ) { + offset = master->size + directory * master->erasesize; + while (master->block_isbad && + master->block_isbad(master, offset)) { + if (!offset) { + nogood: + printk(KERN_NOTICE "Failed to find a non-bad block to check for RedBoot partition table\n"); + return -EIO; + } + offset -= master->erasesize; + } + } else { + offset = directory * master->erasesize; + while (master->block_isbad && + master->block_isbad(master, offset)) { + offset += master->erasesize; + if (offset == master->size) + goto nogood; + } + } buf = vmalloc(master->erasesize); if (!buf) return -ENOMEM; - if ( directory < 0 ) - offset = master->size + directory*master->erasesize; - else - offset = directory*master->erasesize; - printk(KERN_NOTICE "Searching for RedBoot partition table in %s at offset 0x%lx\n", master->name, offset); diff --git a/drivers/mtd/ubi/build.c b/drivers/mtd/ubi/build.c index 023653977a1a..6ac81e35355c 100644 --- a/drivers/mtd/ubi/build.c +++ b/drivers/mtd/ubi/build.c @@ -21,11 +21,16 @@ */ /* - * This file includes UBI initialization and building of UBI devices. At the - * moment UBI devices may only be added while UBI is initialized, but dynamic - * device add/remove functionality is planned. Also, at the moment we only - * attach UBI devices by scanning, which will become a bottleneck when flashes - * reach certain large size. Then one may improve UBI and add other methods. + * This file includes UBI initialization and building of UBI devices. + * + * When UBI is initialized, it attaches all the MTD devices specified as the + * module load parameters or the kernel boot parameters. If MTD devices were + * specified, UBI does not attach any MTD device, but it is possible to do + * later using the "UBI control device". + * + * At the moment we only attach UBI devices by scanning, which will become a + * bottleneck when flashes reach certain large size. Then one may improve UBI + * and add other methods, although it does not seem to be easy to do. */ #include <linux/err.h> @@ -33,7 +38,9 @@ #include <linux/moduleparam.h> #include <linux/stringify.h> #include <linux/stat.h> +#include <linux/miscdevice.h> #include <linux/log2.h> +#include <linux/kthread.h> #include "ubi.h" /* Maximum length of the 'mtd=' parameter */ @@ -43,13 +50,11 @@ * struct mtd_dev_param - MTD device parameter description data structure. * @name: MTD device name or number string * @vid_hdr_offs: VID header offset - * @data_offs: data offset */ struct mtd_dev_param { char name[MTD_PARAM_LEN_MAX]; int vid_hdr_offs; - int data_offs; }; /* Numbers of elements set in the @mtd_dev_param array */ @@ -58,14 +63,27 @@ static int mtd_devs = 0; /* MTD devices specification parameters */ static struct mtd_dev_param mtd_dev_param[UBI_MAX_DEVICES]; -/* Number of UBI devices in system */ -int ubi_devices_cnt; +/* Root UBI "class" object (corresponds to '/<sysfs>/class/ubi/') */ +struct class *ubi_class; + +/* Slab cache for wear-leveling entries */ +struct kmem_cache *ubi_wl_entry_slab; + +/* UBI control character device */ +static struct miscdevice ubi_ctrl_cdev = { + .minor = MISC_DYNAMIC_MINOR, + .name = "ubi_ctrl", + .fops = &ubi_ctrl_cdev_operations, +}; /* All UBI devices in system */ -struct ubi_device *ubi_devices[UBI_MAX_DEVICES]; +static struct ubi_device *ubi_devices[UBI_MAX_DEVICES]; -/* Root UBI "class" object (corresponds to '/<sysfs>/class/ubi/') */ -struct class *ubi_class; +/* Serializes UBI devices creations and removals */ +DEFINE_MUTEX(ubi_devices_mutex); + +/* Protects @ubi_devices and @ubi->ref_count */ +static DEFINE_SPINLOCK(ubi_devices_lock); /* "Show" method for files in '/<sysfs>/class/ubi/' */ static ssize_t ubi_version_show(struct class *class, char *buf) @@ -101,38 +119,150 @@ static struct device_attribute dev_min_io_size = __ATTR(min_io_size, S_IRUGO, dev_attribute_show, NULL); static struct device_attribute dev_bgt_enabled = __ATTR(bgt_enabled, S_IRUGO, dev_attribute_show, NULL); +static struct device_attribute dev_mtd_num = + __ATTR(mtd_num, S_IRUGO, dev_attribute_show, NULL); + +/** + * ubi_get_device - get UBI device. + * @ubi_num: UBI device number + * + * This function returns UBI device description object for UBI device number + * @ubi_num, or %NULL if the device does not exist. This function increases the + * device reference count to prevent removal of the device. In other words, the + * device cannot be removed if its reference count is not zero. + */ +struct ubi_device *ubi_get_device(int ubi_num) +{ + struct ubi_device *ubi; + + spin_lock(&ubi_devices_lock); + ubi = ubi_devices[ubi_num]; + if (ubi) { + ubi_assert(ubi->ref_count >= 0); + ubi->ref_count += 1; + get_device(&ubi->dev); + } + spin_unlock(&ubi_devices_lock); + + return ubi; +} + +/** + * ubi_put_device - drop an UBI device reference. + * @ubi: UBI device description object + */ +void ubi_put_device(struct ubi_device *ubi) +{ + spin_lock(&ubi_devices_lock); + ubi->ref_count -= 1; + put_device(&ubi->dev); + spin_unlock(&ubi_devices_lock); +} + +/** + * ubi_get_by_major - get UBI device description object by character device + * major number. + * @major: major number + * + * This function is similar to 'ubi_get_device()', but it searches the device + * by its major number. + */ +struct ubi_device *ubi_get_by_major(int major) +{ + int i; + struct ubi_device *ubi; + + spin_lock(&ubi_devices_lock); + for (i = 0; i < UBI_MAX_DEVICES; i++) { + ubi = ubi_devices[i]; + if (ubi && MAJOR(ubi->cdev.dev) == major) { + ubi_assert(ubi->ref_count >= 0); + ubi->ref_count += 1; + get_device(&ubi->dev); + spin_unlock(&ubi_devices_lock); + return ubi; + } + } + spin_unlock(&ubi_devices_lock); + + return NULL; +} + +/** + * ubi_major2num - get UBI device number by character device major number. + * @major: major number + * + * This function searches UBI device number object by its major number. If UBI + * device was not found, this function returns -ENODEV, otherwise the UBI device + * number is returned. + */ +int ubi_major2num(int major) +{ + int i, ubi_num = -ENODEV; + + spin_lock(&ubi_devices_lock); + for (i = 0; i < UBI_MAX_DEVICES; i++) { + struct ubi_device *ubi = ubi_devices[i]; + + if (ubi && MAJOR(ubi->cdev.dev) == major) { + ubi_num = ubi->ubi_num; + break; + } + } + spin_unlock(&ubi_devices_lock); + + return ubi_num; +} /* "Show" method for files in '/<sysfs>/class/ubi/ubiX/' */ static ssize_t dev_attribute_show(struct device *dev, struct device_attribute *attr, char *buf) { - const struct ubi_device *ubi; + ssize_t ret; + struct ubi_device *ubi; + /* + * The below code looks weird, but it actually makes sense. We get the + * UBI device reference from the contained 'struct ubi_device'. But it + * is unclear if the device was removed or not yet. Indeed, if the + * device was removed before we increased its reference count, + * 'ubi_get_device()' will return -ENODEV and we fail. + * + * Remember, 'struct ubi_device' is freed in the release function, so + * we still can use 'ubi->ubi_num'. + */ ubi = container_of(dev, struct ubi_device, dev); + ubi = ubi_get_device(ubi->ubi_num); + if (!ubi) + return -ENODEV; + if (attr == &dev_eraseblock_size) - return sprintf(buf, "%d\n", ubi->leb_size); + ret = sprintf(buf, "%d\n", ubi->leb_size); else if (attr == &dev_avail_eraseblocks) - return sprintf(buf, "%d\n", ubi->avail_pebs); + ret = sprintf(buf, "%d\n", ubi->avail_pebs); else if (attr == &dev_total_eraseblocks) - return sprintf(buf, "%d\n", ubi->good_peb_count); + ret = sprintf(buf, "%d\n", ubi->good_peb_count); else if (attr == &dev_volumes_count) - return sprintf(buf, "%d\n", ubi->vol_count); + ret = sprintf(buf, "%d\n", ubi->vol_count - UBI_INT_VOL_COUNT); else if (attr == &dev_max_ec) - return sprintf(buf, "%d\n", ubi->max_ec); + ret = sprintf(buf, "%d\n", ubi->max_ec); else if (attr == &dev_reserved_for_bad) - return sprintf(buf, "%d\n", ubi->beb_rsvd_pebs); + ret = sprintf(buf, "%d\n", ubi->beb_rsvd_pebs); else if (attr == &dev_bad_peb_count) - return sprintf(buf, "%d\n", ubi->bad_peb_count); + ret = sprintf(buf, "%d\n", ubi->bad_peb_count); else if (attr == &dev_max_vol_count) - return sprintf(buf, "%d\n", ubi->vtbl_slots); + ret = sprintf(buf, "%d\n", ubi->vtbl_slots); else if (attr == &dev_min_io_size) - return sprintf(buf, "%d\n", ubi->min_io_size); + ret = sprintf(buf, "%d\n", ubi->min_io_size); else if (attr == &dev_bgt_enabled) - return sprintf(buf, "%d\n", ubi->thread_enabled); + ret = sprintf(buf, "%d\n", ubi->thread_enabled); + else if (attr == &dev_mtd_num) + ret = sprintf(buf, "%d\n", ubi->mtd->index); else - BUG(); + ret = -EINVAL; - return 0; + ubi_put_device(ubi); + return ret; } /* Fake "release" method for UBI devices */ @@ -150,68 +280,44 @@ static int ubi_sysfs_init(struct ubi_device *ubi) int err; ubi->dev.release = dev_release; - ubi->dev.devt = MKDEV(ubi->major, 0); + ubi->dev.devt = ubi->cdev.dev; ubi->dev.class = ubi_class; sprintf(&ubi->dev.bus_id[0], UBI_NAME_STR"%d", ubi->ubi_num); err = device_register(&ubi->dev); if (err) - goto out; + return err; err = device_create_file(&ubi->dev, &dev_eraseblock_size); if (err) - goto out_unregister; + return err; err = device_create_file(&ubi->dev, &dev_avail_eraseblocks); if (err) - goto out_eraseblock_size; + return err; err = device_create_file(&ubi->dev, &dev_total_eraseblocks); if (err) - goto out_avail_eraseblocks; + return err; err = device_create_file(&ubi->dev, &dev_volumes_count); if (err) - goto out_total_eraseblocks; + return err; err = device_create_file(&ubi->dev, &dev_max_ec); if (err) - goto out_volumes_count; + return err; err = device_create_file(&ubi->dev, &dev_reserved_for_bad); if (err) - goto out_volumes_max_ec; + return err; err = device_create_file(&ubi->dev, &dev_bad_peb_count); if (err) - goto out_reserved_for_bad; + return err; err = device_create_file(&ubi->dev, &dev_max_vol_count); if (err) - goto out_bad_peb_count; + return err; err = device_create_file(&ubi->dev, &dev_min_io_size); if (err) - goto out_max_vol_count; + return err; err = device_create_file(&ubi->dev, &dev_bgt_enabled); if (err) - goto out_min_io_size; - - return 0; - -out_min_io_size: - device_remove_file(&ubi->dev, &dev_min_io_size); -out_max_vol_count: - device_remove_file(&ubi->dev, &dev_max_vol_count); -out_bad_peb_count: - device_remove_file(&ubi->dev, &dev_bad_peb_count); -out_reserved_for_bad: - device_remove_file(&ubi->dev, &dev_reserved_for_bad); -out_volumes_max_ec: - device_remove_file(&ubi->dev, &dev_max_ec); -out_volumes_count: - device_remove_file(&ubi->dev, &dev_volumes_count); -out_total_eraseblocks: - device_remove_file(&ubi->dev, &dev_total_eraseblocks); -out_avail_eraseblocks: - device_remove_file(&ubi->dev, &dev_avail_eraseblocks); -out_eraseblock_size: - device_remove_file(&ubi->dev, &dev_eraseblock_size); -out_unregister: - device_unregister(&ubi->dev); -out: - ubi_err("failed to initialize sysfs for %s", ubi->ubi_name); + return err; + err = device_create_file(&ubi->dev, &dev_mtd_num); return err; } @@ -221,6 +327,7 @@ out: */ static void ubi_sysfs_close(struct ubi_device *ubi) { + device_remove_file(&ubi->dev, &dev_mtd_num); device_remove_file(&ubi->dev, &dev_bgt_enabled); device_remove_file(&ubi->dev, &dev_min_io_size); device_remove_file(&ubi->dev, &dev_max_vol_count); @@ -244,7 +351,7 @@ static void kill_volumes(struct ubi_device *ubi) for (i = 0; i < ubi->vtbl_slots; i++) if (ubi->volumes[i]) - ubi_free_volume(ubi, i); + ubi_free_volume(ubi, ubi->volumes[i]); } /** @@ -259,9 +366,6 @@ static int uif_init(struct ubi_device *ubi) int i, err; dev_t dev; - mutex_init(&ubi->vtbl_mutex); - spin_lock_init(&ubi->volumes_lock); - sprintf(ubi->ubi_name, UBI_NAME_STR "%d", ubi->ubi_num); /* @@ -278,39 +382,40 @@ static int uif_init(struct ubi_device *ubi) return err; } + ubi_assert(MINOR(dev) == 0); cdev_init(&ubi->cdev, &ubi_cdev_operations); - ubi->major = MAJOR(dev); - dbg_msg("%s major is %u", ubi->ubi_name, ubi->major); + dbg_msg("%s major is %u", ubi->ubi_name, MAJOR(dev)); ubi->cdev.owner = THIS_MODULE; - dev = MKDEV(ubi->major, 0); err = cdev_add(&ubi->cdev, dev, 1); if (err) { - ubi_err("cannot add character device %s", ubi->ubi_name); + ubi_err("cannot add character device"); goto out_unreg; } err = ubi_sysfs_init(ubi); if (err) - goto out_cdev; + goto out_sysfs; for (i = 0; i < ubi->vtbl_slots; i++) if (ubi->volumes[i]) { - err = ubi_add_volume(ubi, i); - if (err) + err = ubi_add_volume(ubi, ubi->volumes[i]); + if (err) { + ubi_err("cannot add volume %d", i); goto out_volumes; + } } return 0; out_volumes: kill_volumes(ubi); +out_sysfs: ubi_sysfs_close(ubi); -out_cdev: cdev_del(&ubi->cdev); out_unreg: - unregister_chrdev_region(MKDEV(ubi->major, 0), - ubi->vtbl_slots + 1); + unregister_chrdev_region(ubi->cdev.dev, ubi->vtbl_slots + 1); + ubi_err("cannot initialize UBI %s, error %d", ubi->ubi_name, err); return err; } @@ -323,7 +428,7 @@ static void uif_close(struct ubi_device *ubi) kill_volumes(ubi); ubi_sysfs_close(ubi); cdev_del(&ubi->cdev); - unregister_chrdev_region(MKDEV(ubi->major, 0), ubi->vtbl_slots + 1); + unregister_chrdev_region(ubi->cdev.dev, ubi->vtbl_slots + 1); } /** @@ -384,9 +489,9 @@ out_si: * assumed: * o EC header is always at offset zero - this cannot be changed; * o VID header starts just after the EC header at the closest address - * aligned to @io->@hdrs_min_io_size; + * aligned to @io->hdrs_min_io_size; * o data starts just after the VID header at the closest address aligned to - * @io->@min_io_size + * @io->min_io_size * * This function returns zero in case of success and a negative error code in * case of failure. @@ -407,6 +512,9 @@ static int io_init(struct ubi_device *ubi) return -EINVAL; } + if (ubi->vid_hdr_offset < 0) + return -EINVAL; + /* * Note, in this implementation we support MTD devices with 0x7FFFFFFF * physical eraseblocks maximum. @@ -424,7 +532,8 @@ static int io_init(struct ubi_device *ubi) /* Make sure minimal I/O unit is power of 2 */ if (!is_power_of_2(ubi->min_io_size)) { - ubi_err("bad min. I/O unit"); + ubi_err("min. I/O unit (%d) is not power of 2", + ubi->min_io_size); return -EINVAL; } @@ -453,10 +562,8 @@ static int io_init(struct ubi_device *ubi) } /* Similar for the data offset */ - if (ubi->leb_start == 0) { - ubi->leb_start = ubi->vid_hdr_offset + ubi->vid_hdr_alsize; - ubi->leb_start = ALIGN(ubi->leb_start, ubi->min_io_size); - } + ubi->leb_start = ubi->vid_hdr_offset + UBI_EC_HDR_SIZE; + ubi->leb_start = ALIGN(ubi->leb_start, ubi->min_io_size); dbg_msg("vid_hdr_offset %d", ubi->vid_hdr_offset); dbg_msg("vid_hdr_aloffset %d", ubi->vid_hdr_aloffset); @@ -514,76 +621,147 @@ static int io_init(struct ubi_device *ubi) } /** - * attach_mtd_dev - attach an MTD device. - * @mtd_dev: MTD device name or number string - * @vid_hdr_offset: VID header offset - * @data_offset: data offset + * autoresize - re-size the volume which has the "auto-resize" flag set. + * @ubi: UBI device description object + * @vol_id: ID of the volume to re-size * - * This function attaches an MTD device to UBI. It first treats @mtd_dev as the - * MTD device name, and tries to open it by this name. If it is unable to open, - * it tries to convert @mtd_dev to an integer and open the MTD device by its - * number. Returns zero in case of success and a negative error code in case of - * failure. + * This function re-sizes the volume marked by the @UBI_VTBL_AUTORESIZE_FLG in + * the volume table to the largest possible size. See comments in ubi-header.h + * for more description of the flag. Returns zero in case of success and a + * negative error code in case of failure. */ -static int attach_mtd_dev(const char *mtd_dev, int vid_hdr_offset, - int data_offset) +static int autoresize(struct ubi_device *ubi, int vol_id) { - struct ubi_device *ubi; - struct mtd_info *mtd; - int i, err; + struct ubi_volume_desc desc; + struct ubi_volume *vol = ubi->volumes[vol_id]; + int err, old_reserved_pebs = vol->reserved_pebs; - mtd = get_mtd_device_nm(mtd_dev); - if (IS_ERR(mtd)) { - int mtd_num; - char *endp; + /* + * Clear the auto-resize flag in the volume in-memory copy of the + * volume table, and 'ubi_resize_volume()' will propogate this change + * to the flash. + */ + ubi->vtbl[vol_id].flags &= ~UBI_VTBL_AUTORESIZE_FLG; - if (PTR_ERR(mtd) != -ENODEV) - return PTR_ERR(mtd); + if (ubi->avail_pebs == 0) { + struct ubi_vtbl_record vtbl_rec; /* - * Probably this is not MTD device name but MTD device number - - * check this out. + * No avalilable PEBs to re-size the volume, clear the flag on + * flash and exit. */ - mtd_num = simple_strtoul(mtd_dev, &endp, 0); - if (*endp != '\0' || mtd_dev == endp) { - ubi_err("incorrect MTD device: \"%s\"", mtd_dev); - return -ENODEV; - } - - mtd = get_mtd_device(NULL, mtd_num); - if (IS_ERR(mtd)) - return PTR_ERR(mtd); + memcpy(&vtbl_rec, &ubi->vtbl[vol_id], + sizeof(struct ubi_vtbl_record)); + err = ubi_change_vtbl_record(ubi, vol_id, &vtbl_rec); + if (err) + ubi_err("cannot clean auto-resize flag for volume %d", + vol_id); + } else { + desc.vol = vol; + err = ubi_resize_volume(&desc, + old_reserved_pebs + ubi->avail_pebs); + if (err) + ubi_err("cannot auto-resize volume %d", vol_id); } - /* Check if we already have the same MTD device attached */ - for (i = 0; i < ubi_devices_cnt; i++) - if (ubi_devices[i]->mtd->index == mtd->index) { - ubi_err("mtd%d is already attached to ubi%d", + if (err) + return err; + + ubi_msg("volume %d (\"%s\") re-sized from %d to %d LEBs", vol_id, + vol->name, old_reserved_pebs, vol->reserved_pebs); + return 0; +} + +/** + * ubi_attach_mtd_dev - attach an MTD device. + * @mtd_dev: MTD device description object + * @ubi_num: number to assign to the new UBI device + * @vid_hdr_offset: VID header offset + * + * This function attaches MTD device @mtd_dev to UBI and assign @ubi_num number + * to the newly created UBI device, unless @ubi_num is %UBI_DEV_NUM_AUTO, in + * which case this function finds a vacant device nubert and assings it + * automatically. Returns the new UBI device number in case of success and a + * negative error code in case of failure. + * + * Note, the invocations of this function has to be serialized by the + * @ubi_devices_mutex. + */ +int ubi_attach_mtd_dev(struct mtd_info *mtd, int ubi_num, int vid_hdr_offset) +{ + struct ubi_device *ubi; + int i, err; + + /* + * Check if we already have the same MTD device attached. + * + * Note, this function assumes that UBI devices creations and deletions + * are serialized, so it does not take the &ubi_devices_lock. + */ + for (i = 0; i < UBI_MAX_DEVICES; i++) { + ubi = ubi_devices[i]; + if (ubi && mtd->index == ubi->mtd->index) { + dbg_err("mtd%d is already attached to ubi%d", mtd->index, i); - err = -EINVAL; - goto out_mtd; + return -EEXIST; } + } - ubi = ubi_devices[ubi_devices_cnt] = kzalloc(sizeof(struct ubi_device), - GFP_KERNEL); - if (!ubi) { - err = -ENOMEM; - goto out_mtd; + /* + * Make sure this MTD device is not emulated on top of an UBI volume + * already. Well, generally this recursion works fine, but there are + * different problems like the UBI module takes a reference to itself + * by attaching (and thus, opening) the emulated MTD device. This + * results in inability to unload the module. And in general it makes + * no sense to attach emulated MTD devices, so we prohibit this. + */ + if (mtd->type == MTD_UBIVOLUME) { + ubi_err("refuse attaching mtd%d - it is already emulated on " + "top of UBI", mtd->index); + return -EINVAL; } - ubi->ubi_num = ubi_devices_cnt; - ubi->mtd = mtd; + if (ubi_num == UBI_DEV_NUM_AUTO) { + /* Search for an empty slot in the @ubi_devices array */ + for (ubi_num = 0; ubi_num < UBI_MAX_DEVICES; ubi_num++) + if (!ubi_devices[ubi_num]) + break; + if (ubi_num == UBI_MAX_DEVICES) { + dbg_err("only %d UBI devices may be created", UBI_MAX_DEVICES); + return -ENFILE; + } + } else { + if (ubi_num >= UBI_MAX_DEVICES) + return -EINVAL; + + /* Make sure ubi_num is not busy */ + if (ubi_devices[ubi_num]) { + dbg_err("ubi%d already exists", ubi_num); + return -EEXIST; + } + } - dbg_msg("attaching mtd%d to ubi%d: VID header offset %d data offset %d", - ubi->mtd->index, ubi_devices_cnt, vid_hdr_offset, data_offset); + ubi = kzalloc(sizeof(struct ubi_device), GFP_KERNEL); + if (!ubi) + return -ENOMEM; + ubi->mtd = mtd; + ubi->ubi_num = ubi_num; ubi->vid_hdr_offset = vid_hdr_offset; - ubi->leb_start = data_offset; + ubi->autoresize_vol_id = -1; + + mutex_init(&ubi->buf_mutex); + mutex_init(&ubi->ckvol_mutex); + mutex_init(&ubi->volumes_mutex); + spin_lock_init(&ubi->volumes_lock); + + dbg_msg("attaching mtd%d to ubi%d: VID header offset %d", + mtd->index, ubi_num, vid_hdr_offset); + err = io_init(ubi); if (err) goto out_free; - mutex_init(&ubi->buf_mutex); ubi->peb_buf1 = vmalloc(ubi->peb_size); if (!ubi->peb_buf1) goto out_free; @@ -605,12 +783,26 @@ static int attach_mtd_dev(const char *mtd_dev, int vid_hdr_offset, goto out_free; } + if (ubi->autoresize_vol_id != -1) { + err = autoresize(ubi, ubi->autoresize_vol_id); + if (err) + goto out_detach; + } + err = uif_init(ubi); if (err) goto out_detach; - ubi_msg("attached mtd%d to ubi%d", ubi->mtd->index, ubi_devices_cnt); - ubi_msg("MTD device name: \"%s\"", ubi->mtd->name); + ubi->bgt_thread = kthread_create(ubi_thread, ubi, ubi->bgt_name); + if (IS_ERR(ubi->bgt_thread)) { + err = PTR_ERR(ubi->bgt_thread); + ubi_err("cannot spawn \"%s\", error %d", ubi->bgt_name, + err); + goto out_uif; + } + + ubi_msg("attached mtd%d to ubi%d", mtd->index, ubi_num); + ubi_msg("MTD device name: \"%s\"", mtd->name); ubi_msg("MTD device size: %llu MiB", ubi->flash_size >> 20); ubi_msg("physical eraseblock size: %d bytes (%d KiB)", ubi->peb_size, ubi->peb_size >> 10); @@ -638,9 +830,11 @@ static int attach_mtd_dev(const char *mtd_dev, int vid_hdr_offset, wake_up_process(ubi->bgt_thread); } - ubi_devices_cnt += 1; - return 0; + ubi_devices[ubi_num] = ubi; + return ubi_num; +out_uif: + uif_close(ubi); out_detach: ubi_eba_close(ubi); ubi_wl_close(ubi); @@ -652,21 +846,58 @@ out_free: vfree(ubi->dbg_peb_buf); #endif kfree(ubi); -out_mtd: - put_mtd_device(mtd); - ubi_devices[ubi_devices_cnt] = NULL; return err; } /** - * detach_mtd_dev - detach an MTD device. - * @ubi: UBI device description object + * ubi_detach_mtd_dev - detach an MTD device. + * @ubi_num: UBI device number to detach from + * @anyway: detach MTD even if device reference count is not zero + * + * This function destroys an UBI device number @ubi_num and detaches the + * underlying MTD device. Returns zero in case of success and %-EBUSY if the + * UBI device is busy and cannot be destroyed, and %-EINVAL if it does not + * exist. + * + * Note, the invocations of this function has to be serialized by the + * @ubi_devices_mutex. */ -static void detach_mtd_dev(struct ubi_device *ubi) +int ubi_detach_mtd_dev(int ubi_num, int anyway) { - int ubi_num = ubi->ubi_num, mtd_num = ubi->mtd->index; + struct ubi_device *ubi; + + if (ubi_num < 0 || ubi_num >= UBI_MAX_DEVICES) + return -EINVAL; + + spin_lock(&ubi_devices_lock); + ubi = ubi_devices[ubi_num]; + if (!ubi) { + spin_unlock(&ubi_devices_lock); + return -EINVAL; + } + + if (ubi->ref_count) { + if (!anyway) { + spin_unlock(&ubi_devices_lock); + return -EBUSY; + } + /* This may only happen if there is a bug */ + ubi_err("%s reference count %d, destroy anyway", + ubi->ubi_name, ubi->ref_count); + } + ubi_devices[ubi_num] = NULL; + spin_unlock(&ubi_devices_lock); + ubi_assert(ubi_num == ubi->ubi_num); dbg_msg("detaching mtd%d from ubi%d", ubi->mtd->index, ubi_num); + + /* + * Before freeing anything, we have to stop the background thread to + * prevent it from doing anything on this device while we are freeing. + */ + if (ubi->bgt_thread) + kthread_stop(ubi->bgt_thread); + uif_close(ubi); ubi_eba_close(ubi); ubi_wl_close(ubi); @@ -677,11 +908,37 @@ static void detach_mtd_dev(struct ubi_device *ubi) #ifdef CONFIG_MTD_UBI_DEBUG vfree(ubi->dbg_peb_buf); #endif - kfree(ubi_devices[ubi_num]); - ubi_devices[ubi_num] = NULL; - ubi_devices_cnt -= 1; - ubi_assert(ubi_devices_cnt >= 0); - ubi_msg("mtd%d is detached from ubi%d", mtd_num, ubi_num); + ubi_msg("mtd%d is detached from ubi%d", ubi->mtd->index, ubi->ubi_num); + kfree(ubi); + return 0; +} + +/** + * find_mtd_device - open an MTD device by its name or number. + * @mtd_dev: name or number of the device + * + * This function tries to open and MTD device described by @mtd_dev string, + * which is first treated as an ASCII number, and if it is not true, it is + * treated as MTD device name. Returns MTD device description object in case of + * success and a negative error code in case of failure. + */ +static struct mtd_info * __init open_mtd_device(const char *mtd_dev) +{ + struct mtd_info *mtd; + int mtd_num; + char *endp; + + mtd_num = simple_strtoul(mtd_dev, &endp, 0); + if (*endp != '\0' || mtd_dev == endp) { + /* + * This does not look like an ASCII integer, probably this is + * MTD device name. + */ + mtd = get_mtd_device_nm(mtd_dev); + } else + mtd = get_mtd_device(NULL, mtd_num); + + return mtd; } static int __init ubi_init(void) @@ -693,47 +950,96 @@ static int __init ubi_init(void) BUILD_BUG_ON(sizeof(struct ubi_vid_hdr) != 64); if (mtd_devs > UBI_MAX_DEVICES) { - printk("UBI error: too many MTD devices, maximum is %d\n", - UBI_MAX_DEVICES); + printk(KERN_ERR "UBI error: too many MTD devices, " + "maximum is %d\n", UBI_MAX_DEVICES); return -EINVAL; } + /* Create base sysfs directory and sysfs files */ ubi_class = class_create(THIS_MODULE, UBI_NAME_STR); - if (IS_ERR(ubi_class)) - return PTR_ERR(ubi_class); + if (IS_ERR(ubi_class)) { + err = PTR_ERR(ubi_class); + printk(KERN_ERR "UBI error: cannot create UBI class\n"); + goto out; + } err = class_create_file(ubi_class, &ubi_version); - if (err) + if (err) { + printk(KERN_ERR "UBI error: cannot create sysfs file\n"); goto out_class; + } + + err = misc_register(&ubi_ctrl_cdev); + if (err) { + printk(KERN_ERR "UBI error: cannot register device\n"); + goto out_version; + } + + ubi_wl_entry_slab = kmem_cache_create("ubi_wl_entry_slab", + sizeof(struct ubi_wl_entry), + 0, 0, NULL); + if (!ubi_wl_entry_slab) + goto out_dev_unreg; /* Attach MTD devices */ for (i = 0; i < mtd_devs; i++) { struct mtd_dev_param *p = &mtd_dev_param[i]; + struct mtd_info *mtd; cond_resched(); - err = attach_mtd_dev(p->name, p->vid_hdr_offs, p->data_offs); - if (err) + + mtd = open_mtd_device(p->name); + if (IS_ERR(mtd)) { + err = PTR_ERR(mtd); + goto out_detach; + } + + mutex_lock(&ubi_devices_mutex); + err = ubi_attach_mtd_dev(mtd, UBI_DEV_NUM_AUTO, + p->vid_hdr_offs); + mutex_unlock(&ubi_devices_mutex); + if (err < 0) { + put_mtd_device(mtd); + printk(KERN_ERR "UBI error: cannot attach %s\n", + p->name); goto out_detach; + } } return 0; out_detach: for (k = 0; k < i; k++) - detach_mtd_dev(ubi_devices[k]); + if (ubi_devices[k]) { + mutex_lock(&ubi_devices_mutex); + ubi_detach_mtd_dev(ubi_devices[k]->ubi_num, 1); + mutex_unlock(&ubi_devices_mutex); + } + kmem_cache_destroy(ubi_wl_entry_slab); +out_dev_unreg: + misc_deregister(&ubi_ctrl_cdev); +out_version: class_remove_file(ubi_class, &ubi_version); out_class: class_destroy(ubi_class); +out: + printk(KERN_ERR "UBI error: cannot initialize UBI, error %d\n", err); return err; } module_init(ubi_init); static void __exit ubi_exit(void) { - int i, n = ubi_devices_cnt; + int i; - for (i = 0; i < n; i++) - detach_mtd_dev(ubi_devices[i]); + for (i = 0; i < UBI_MAX_DEVICES; i++) + if (ubi_devices[i]) { + mutex_lock(&ubi_devices_mutex); + ubi_detach_mtd_dev(ubi_devices[i]->ubi_num, 1); + mutex_unlock(&ubi_devices_mutex); + } + kmem_cache_destroy(ubi_wl_entry_slab); + misc_deregister(&ubi_ctrl_cdev); class_remove_file(ubi_class, &ubi_version); class_destroy(ubi_class); } @@ -754,7 +1060,8 @@ static int __init bytes_str_to_int(const char *str) result = simple_strtoul(str, &endp, 0); if (str == endp || result < 0) { - printk("UBI error: incorrect bytes count: \"%s\"\n", str); + printk(KERN_ERR "UBI error: incorrect bytes count: \"%s\"\n", + str); return -EINVAL; } @@ -764,15 +1071,14 @@ static int __init bytes_str_to_int(const char *str) case 'M': result *= 1024; case 'K': - case 'k': result *= 1024; - if (endp[1] == 'i' && (endp[2] == '\0' || - endp[2] == 'B' || endp[2] == 'b')) + if (endp[1] == 'i' && endp[2] == 'B') endp += 2; case '\0': break; default: - printk("UBI error: incorrect bytes count: \"%s\"\n", str); + printk(KERN_ERR "UBI error: incorrect bytes count: \"%s\"\n", + str); return -EINVAL; } @@ -793,23 +1099,27 @@ static int __init ubi_mtd_param_parse(const char *val, struct kernel_param *kp) struct mtd_dev_param *p; char buf[MTD_PARAM_LEN_MAX]; char *pbuf = &buf[0]; - char *tokens[3] = {NULL, NULL, NULL}; + char *tokens[2] = {NULL, NULL}; + + if (!val) + return -EINVAL; if (mtd_devs == UBI_MAX_DEVICES) { - printk("UBI error: too many parameters, max. is %d\n", + printk(KERN_ERR "UBI error: too many parameters, max. is %d\n", UBI_MAX_DEVICES); return -EINVAL; } len = strnlen(val, MTD_PARAM_LEN_MAX); if (len == MTD_PARAM_LEN_MAX) { - printk("UBI error: parameter \"%s\" is too long, max. is %d\n", - val, MTD_PARAM_LEN_MAX); + printk(KERN_ERR "UBI error: parameter \"%s\" is too long, " + "max. is %d\n", val, MTD_PARAM_LEN_MAX); return -EINVAL; } if (len == 0) { - printk("UBI warning: empty 'mtd=' parameter - ignored\n"); + printk(KERN_WARNING "UBI warning: empty 'mtd=' parameter - " + "ignored\n"); return 0; } @@ -819,11 +1129,12 @@ static int __init ubi_mtd_param_parse(const char *val, struct kernel_param *kp) if (buf[len - 1] == '\n') buf[len - 1] = '\0'; - for (i = 0; i < 3; i++) + for (i = 0; i < 2; i++) tokens[i] = strsep(&pbuf, ","); if (pbuf) { - printk("UBI error: too many arguments at \"%s\"\n", val); + printk(KERN_ERR "UBI error: too many arguments at \"%s\"\n", + val); return -EINVAL; } @@ -832,13 +1143,9 @@ static int __init ubi_mtd_param_parse(const char *val, struct kernel_param *kp) if (tokens[1]) p->vid_hdr_offs = bytes_str_to_int(tokens[1]); - if (tokens[2]) - p->data_offs = bytes_str_to_int(tokens[2]); if (p->vid_hdr_offs < 0) return p->vid_hdr_offs; - if (p->data_offs < 0) - return p->data_offs; mtd_devs += 1; return 0; @@ -846,16 +1153,15 @@ static int __init ubi_mtd_param_parse(const char *val, struct kernel_param *kp) module_param_call(mtd, ubi_mtd_param_parse, NULL, NULL, 000); MODULE_PARM_DESC(mtd, "MTD devices to attach. Parameter format: " - "mtd=<name|num>[,<vid_hdr_offs>,<data_offs>]. " + "mtd=<name|num>[,<vid_hdr_offs>].\n" "Multiple \"mtd\" parameters may be specified.\n" - "MTD devices may be specified by their number or name. " - "Optional \"vid_hdr_offs\" and \"data_offs\" parameters " - "specify UBI VID header position and data starting " - "position to be used by UBI.\n" - "Example: mtd=content,1984,2048 mtd=4 - attach MTD device" - "with name content using VID header offset 1984 and data " - "start 2048, and MTD device number 4 using default " - "offsets"); + "MTD devices may be specified by their number or name.\n" + "Optional \"vid_hdr_offs\" parameter specifies UBI VID " + "header position and data starting position to be used " + "by UBI.\n" + "Example: mtd=content,1984 mtd=4 - attach MTD device" + "with name \"content\" using VID header offset 1984, and " + "MTD device number 4 with default VID header offset."); MODULE_VERSION(__stringify(UBI_VERSION)); MODULE_DESCRIPTION("UBI - Unsorted Block Images"); diff --git a/drivers/mtd/ubi/cdev.c b/drivers/mtd/ubi/cdev.c index fe4da1e96c52..9d6aae5449b6 100644 --- a/drivers/mtd/ubi/cdev.c +++ b/drivers/mtd/ubi/cdev.c @@ -28,6 +28,11 @@ * * Major and minor numbers are assigned dynamically to both UBI and volume * character devices. + * + * Well, there is the third kind of character devices - the UBI control + * character device, which allows to manipulate by UBI devices - create and + * delete them. In other words, it is used for attaching and detaching MTD + * devices. */ #include <linux/module.h> @@ -39,34 +44,6 @@ #include <asm/div64.h> #include "ubi.h" -/* - * Maximum sequence numbers of UBI and volume character device IOCTLs (direct - * logical eraseblock erase is a debug-only feature). - */ -#define UBI_CDEV_IOC_MAX_SEQ 2 -#ifndef CONFIG_MTD_UBI_DEBUG_USERSPACE_IO -#define VOL_CDEV_IOC_MAX_SEQ 1 -#else -#define VOL_CDEV_IOC_MAX_SEQ 2 -#endif - -/** - * major_to_device - get UBI device object by character device major number. - * @major: major number - * - * This function returns a pointer to the UBI device object. - */ -static struct ubi_device *major_to_device(int major) -{ - int i; - - for (i = 0; i < ubi_devices_cnt; i++) - if (ubi_devices[i] && ubi_devices[i]->major == major) - return ubi_devices[i]; - BUG(); - return NULL; -} - /** * get_exclusive - get exclusive access to an UBI volume. * @desc: volume descriptor @@ -124,9 +101,11 @@ static void revoke_exclusive(struct ubi_volume_desc *desc, int mode) static int vol_cdev_open(struct inode *inode, struct file *file) { struct ubi_volume_desc *desc; - const struct ubi_device *ubi = major_to_device(imajor(inode)); - int vol_id = iminor(inode) - 1; - int mode; + int vol_id = iminor(inode) - 1, mode, ubi_num; + + ubi_num = ubi_major2num(imajor(inode)); + if (ubi_num < 0) + return ubi_num; if (file->f_mode & FMODE_WRITE) mode = UBI_READWRITE; @@ -135,7 +114,7 @@ static int vol_cdev_open(struct inode *inode, struct file *file) dbg_msg("open volume %d, mode %d", vol_id, mode); - desc = ubi_open_volume(ubi->ubi_num, vol_id, mode); + desc = ubi_open_volume(ubi_num, vol_id, mode); if (IS_ERR(desc)) return PTR_ERR(desc); @@ -153,8 +132,15 @@ static int vol_cdev_release(struct inode *inode, struct file *file) if (vol->updating) { ubi_warn("update of volume %d not finished, volume is damaged", vol->vol_id); + ubi_assert(!vol->changing_leb); vol->updating = 0; vfree(vol->upd_buf); + } else if (vol->changing_leb) { + dbg_msg("only %lld of %lld bytes received for atomic LEB change" + " for volume %d:%d, cancel", vol->upd_received, + vol->upd_bytes, vol->ubi->ubi_num, vol->vol_id); + vol->changing_leb = 0; + vfree(vol->upd_buf); } ubi_close_volume(desc); @@ -205,13 +191,13 @@ static ssize_t vol_cdev_read(struct file *file, __user char *buf, size_t count, struct ubi_volume_desc *desc = file->private_data; struct ubi_volume *vol = desc->vol; struct ubi_device *ubi = vol->ubi; - int err, lnum, off, len, vol_id = desc->vol->vol_id, tbuf_size; + int err, lnum, off, len, tbuf_size; size_t count_save = count; void *tbuf; uint64_t tmp; dbg_msg("read %zd bytes from offset %lld of volume %d", - count, *offp, vol_id); + count, *offp, vol->vol_id); if (vol->updating) { dbg_err("updating"); @@ -225,7 +211,7 @@ static ssize_t vol_cdev_read(struct file *file, __user char *buf, size_t count, return 0; if (vol->corrupted) - dbg_msg("read from corrupted volume %d", vol_id); + dbg_msg("read from corrupted volume %d", vol->vol_id); if (*offp + count > vol->used_bytes) count_save = count = vol->used_bytes - *offp; @@ -249,7 +235,7 @@ static ssize_t vol_cdev_read(struct file *file, __user char *buf, size_t count, if (off + len >= vol->usable_leb_size) len = vol->usable_leb_size - off; - err = ubi_eba_read_leb(ubi, vol_id, lnum, tbuf, off, len, 0); + err = ubi_eba_read_leb(ubi, vol, lnum, tbuf, off, len, 0); if (err) break; @@ -289,13 +275,13 @@ static ssize_t vol_cdev_direct_write(struct file *file, const char __user *buf, struct ubi_volume_desc *desc = file->private_data; struct ubi_volume *vol = desc->vol; struct ubi_device *ubi = vol->ubi; - int lnum, off, len, tbuf_size, vol_id = vol->vol_id, err = 0; + int lnum, off, len, tbuf_size, err = 0; size_t count_save = count; char *tbuf; uint64_t tmp; dbg_msg("requested: write %zd bytes to offset %lld of volume %u", - count, *offp, desc->vol->vol_id); + count, *offp, vol->vol_id); if (vol->vol_type == UBI_STATIC_VOLUME) return -EROFS; @@ -339,7 +325,7 @@ static ssize_t vol_cdev_direct_write(struct file *file, const char __user *buf, break; } - err = ubi_eba_write_leb(ubi, vol_id, lnum, tbuf, off, len, + err = ubi_eba_write_leb(ubi, vol, lnum, tbuf, off, len, UBI_UNKNOWN); if (err) break; @@ -372,22 +358,32 @@ static ssize_t vol_cdev_write(struct file *file, const char __user *buf, struct ubi_volume *vol = desc->vol; struct ubi_device *ubi = vol->ubi; - if (!vol->updating) + if (!vol->updating && !vol->changing_leb) return vol_cdev_direct_write(file, buf, count, offp); - err = ubi_more_update_data(ubi, vol->vol_id, buf, count); + if (vol->updating) + err = ubi_more_update_data(ubi, vol, buf, count); + else + err = ubi_more_leb_change_data(ubi, vol, buf, count); + if (err < 0) { - ubi_err("cannot write %zd bytes of update data", count); + ubi_err("cannot accept more %zd bytes of data, error %d", + count, err); return err; } if (err) { /* - * Update is finished, @err contains number of actually written - * bytes now. + * The operation is finished, @err contains number of actually + * written bytes. */ count = err; + if (vol->changing_leb) { + revoke_exclusive(desc, UBI_READWRITE); + return count; + } + err = ubi_check_volume(ubi, vol->vol_id); if (err < 0) return err; @@ -402,7 +398,6 @@ static ssize_t vol_cdev_write(struct file *file, const char __user *buf, revoke_exclusive(desc, UBI_READWRITE); } - *offp += count; return count; } @@ -447,11 +442,46 @@ static int vol_cdev_ioctl(struct inode *inode, struct file *file, if (err < 0) break; - err = ubi_start_update(ubi, vol->vol_id, bytes); + err = ubi_start_update(ubi, vol, bytes); if (bytes == 0) revoke_exclusive(desc, UBI_READWRITE); + break; + } + + /* Atomic logical eraseblock change command */ + case UBI_IOCEBCH: + { + struct ubi_leb_change_req req; + + err = copy_from_user(&req, argp, + sizeof(struct ubi_leb_change_req)); + if (err) { + err = -EFAULT; + break; + } + + if (desc->mode == UBI_READONLY || + vol->vol_type == UBI_STATIC_VOLUME) { + err = -EROFS; + break; + } + + /* Validate the request */ + err = -EINVAL; + if (req.lnum < 0 || req.lnum >= vol->reserved_pebs || + req.bytes < 0 || req.lnum >= vol->usable_leb_size) + break; + if (req.dtype != UBI_LONGTERM && req.dtype != UBI_SHORTTERM && + req.dtype != UBI_UNKNOWN) + break; + + err = get_exclusive(desc); + if (err < 0) + break; - file->f_pos = 0; + err = ubi_start_leb_change(ubi, vol, &req); + if (req.bytes == 0) + revoke_exclusive(desc, UBI_READWRITE); break; } @@ -467,7 +497,8 @@ static int vol_cdev_ioctl(struct inode *inode, struct file *file, break; } - if (desc->mode == UBI_READONLY) { + if (desc->mode == UBI_READONLY || + vol->vol_type == UBI_STATIC_VOLUME) { err = -EROFS; break; } @@ -477,13 +508,8 @@ static int vol_cdev_ioctl(struct inode *inode, struct file *file, break; } - if (vol->vol_type != UBI_DYNAMIC_VOLUME) { - err = -EROFS; - break; - } - dbg_msg("erase LEB %d:%d", vol->vol_id, lnum); - err = ubi_eba_unmap_leb(ubi, vol->vol_id, lnum); + err = ubi_eba_unmap_leb(ubi, vol, lnum); if (err) break; @@ -580,9 +606,9 @@ static int ubi_cdev_ioctl(struct inode *inode, struct file *file, if (!capable(CAP_SYS_RESOURCE)) return -EPERM; - ubi = major_to_device(imajor(inode)); - if (IS_ERR(ubi)) - return PTR_ERR(ubi); + ubi = ubi_get_by_major(imajor(inode)); + if (!ubi) + return -ENODEV; switch (cmd) { /* Create volume command */ @@ -591,8 +617,7 @@ static int ubi_cdev_ioctl(struct inode *inode, struct file *file, struct ubi_mkvol_req req; dbg_msg("create volume"); - err = copy_from_user(&req, argp, - sizeof(struct ubi_mkvol_req)); + err = copy_from_user(&req, argp, sizeof(struct ubi_mkvol_req)); if (err) { err = -EFAULT; break; @@ -604,7 +629,9 @@ static int ubi_cdev_ioctl(struct inode *inode, struct file *file, req.name[req.name_len] = '\0'; + mutex_lock(&ubi->volumes_mutex); err = ubi_create_volume(ubi, &req); + mutex_unlock(&ubi->volumes_mutex); if (err) break; @@ -633,10 +660,16 @@ static int ubi_cdev_ioctl(struct inode *inode, struct file *file, break; } + mutex_lock(&ubi->volumes_mutex); err = ubi_remove_volume(desc); - if (err) - ubi_close_volume(desc); + mutex_unlock(&ubi->volumes_mutex); + /* + * The volume is deleted (unless an error occurred), and the + * 'struct ubi_volume' object will be freed when + * 'ubi_close_volume()' will call 'put_device()'. + */ + ubi_close_volume(desc); break; } @@ -648,8 +681,7 @@ static int ubi_cdev_ioctl(struct inode *inode, struct file *file, struct ubi_rsvol_req req; dbg_msg("re-size volume"); - err = copy_from_user(&req, argp, - sizeof(struct ubi_rsvol_req)); + err = copy_from_user(&req, argp, sizeof(struct ubi_rsvol_req)); if (err) { err = -EFAULT; break; @@ -669,7 +701,9 @@ static int ubi_cdev_ioctl(struct inode *inode, struct file *file, pebs = !!do_div(tmp, desc->vol->usable_leb_size); pebs += tmp; + mutex_lock(&ubi->volumes_mutex); err = ubi_resize_volume(desc, pebs); + mutex_unlock(&ubi->volumes_mutex); ubi_close_volume(desc); break; } @@ -679,9 +713,93 @@ static int ubi_cdev_ioctl(struct inode *inode, struct file *file, break; } + ubi_put_device(ubi); return err; } +static int ctrl_cdev_ioctl(struct inode *inode, struct file *file, + unsigned int cmd, unsigned long arg) +{ + int err = 0; + void __user *argp = (void __user *)arg; + + if (!capable(CAP_SYS_RESOURCE)) + return -EPERM; + + switch (cmd) { + /* Attach an MTD device command */ + case UBI_IOCATT: + { + struct ubi_attach_req req; + struct mtd_info *mtd; + + dbg_msg("attach MTD device"); + err = copy_from_user(&req, argp, sizeof(struct ubi_attach_req)); + if (err) { + err = -EFAULT; + break; + } + + if (req.mtd_num < 0 || + (req.ubi_num < 0 && req.ubi_num != UBI_DEV_NUM_AUTO)) { + err = -EINVAL; + break; + } + + mtd = get_mtd_device(NULL, req.mtd_num); + if (IS_ERR(mtd)) { + err = PTR_ERR(mtd); + break; + } + + /* + * Note, further request verification is done by + * 'ubi_attach_mtd_dev()'. + */ + mutex_lock(&ubi_devices_mutex); + err = ubi_attach_mtd_dev(mtd, req.ubi_num, req.vid_hdr_offset); + mutex_unlock(&ubi_devices_mutex); + if (err < 0) + put_mtd_device(mtd); + else + /* @err contains UBI device number */ + err = put_user(err, (__user int32_t *)argp); + + break; + } + + /* Detach an MTD device command */ + case UBI_IOCDET: + { + int ubi_num; + + dbg_msg("dettach MTD device"); + err = get_user(ubi_num, (__user int32_t *)argp); + if (err) { + err = -EFAULT; + break; + } + + mutex_lock(&ubi_devices_mutex); + err = ubi_detach_mtd_dev(ubi_num, 0); + mutex_unlock(&ubi_devices_mutex); + break; + } + + default: + err = -ENOTTY; + break; + } + + return err; +} + +/* UBI control character device operations */ +struct file_operations ubi_ctrl_cdev_operations = { + .ioctl = ctrl_cdev_ioctl, + .owner = THIS_MODULE, +}; + /* UBI character device operations */ struct file_operations ubi_cdev_operations = { .owner = THIS_MODULE, diff --git a/drivers/mtd/ubi/debug.h b/drivers/mtd/ubi/debug.h index 467722eb618b..51c40b17f1ec 100644 --- a/drivers/mtd/ubi/debug.h +++ b/drivers/mtd/ubi/debug.h @@ -39,8 +39,9 @@ #ifdef CONFIG_MTD_UBI_DEBUG_MSG /* Generic debugging message */ -#define dbg_msg(fmt, ...) \ - printk(KERN_DEBUG "UBI DBG: %s: " fmt "\n", __FUNCTION__, ##__VA_ARGS__) +#define dbg_msg(fmt, ...) \ + printk(KERN_DEBUG "UBI DBG (pid %d): %s: " fmt "\n", \ + current->pid, __FUNCTION__, ##__VA_ARGS__) #define ubi_dbg_dump_stack() dump_stack() @@ -76,36 +77,28 @@ void ubi_dbg_dump_mkvol_req(const struct ubi_mkvol_req *req); #ifdef CONFIG_MTD_UBI_DEBUG_MSG_EBA /* Messages from the eraseblock association unit */ -#define dbg_eba(fmt, ...) \ - printk(KERN_DEBUG "UBI DBG eba: %s: " fmt "\n", __FUNCTION__, \ - ##__VA_ARGS__) +#define dbg_eba(fmt, ...) dbg_msg(fmt, ##__VA_ARGS__) #else #define dbg_eba(fmt, ...) ({}) #endif #ifdef CONFIG_MTD_UBI_DEBUG_MSG_WL /* Messages from the wear-leveling unit */ -#define dbg_wl(fmt, ...) \ - printk(KERN_DEBUG "UBI DBG wl: %s: " fmt "\n", __FUNCTION__, \ - ##__VA_ARGS__) +#define dbg_wl(fmt, ...) dbg_msg(fmt, ##__VA_ARGS__) #else #define dbg_wl(fmt, ...) ({}) #endif #ifdef CONFIG_MTD_UBI_DEBUG_MSG_IO /* Messages from the input/output unit */ -#define dbg_io(fmt, ...) \ - printk(KERN_DEBUG "UBI DBG io: %s: " fmt "\n", __FUNCTION__, \ - ##__VA_ARGS__) +#define dbg_io(fmt, ...) dbg_msg(fmt, ##__VA_ARGS__) #else #define dbg_io(fmt, ...) ({}) #endif #ifdef CONFIG_MTD_UBI_DEBUG_MSG_BLD /* Initialization and build messages */ -#define dbg_bld(fmt, ...) \ - printk(KERN_DEBUG "UBI DBG bld: %s: " fmt "\n", __FUNCTION__, \ - ##__VA_ARGS__) +#define dbg_bld(fmt, ...) dbg_msg(fmt, ##__VA_ARGS__) #else #define dbg_bld(fmt, ...) ({}) #endif diff --git a/drivers/mtd/ubi/eba.c b/drivers/mtd/ubi/eba.c index 880fa3690352..7ce91ca742b1 100644 --- a/drivers/mtd/ubi/eba.c +++ b/drivers/mtd/ubi/eba.c @@ -31,7 +31,7 @@ * logical eraseblock it is locked for reading or writing. The per-logical * eraseblock locking is implemented by means of the lock tree. The lock tree * is an RB-tree which refers all the currently locked logical eraseblocks. The - * lock tree elements are &struct ltree_entry objects. They are indexed by + * lock tree elements are &struct ubi_ltree_entry objects. They are indexed by * (@vol_id, @lnum) pairs. * * EBA also maintains the global sequence counter which is incremented each @@ -50,29 +50,6 @@ #define EBA_RESERVED_PEBS 1 /** - * struct ltree_entry - an entry in the lock tree. - * @rb: links RB-tree nodes - * @vol_id: volume ID of the locked logical eraseblock - * @lnum: locked logical eraseblock number - * @users: how many tasks are using this logical eraseblock or wait for it - * @mutex: read/write mutex to implement read/write access serialization to - * the (@vol_id, @lnum) logical eraseblock - * - * When a logical eraseblock is being locked - corresponding &struct ltree_entry - * object is inserted to the lock tree (@ubi->ltree). - */ -struct ltree_entry { - struct rb_node rb; - int vol_id; - int lnum; - int users; - struct rw_semaphore mutex; -}; - -/* Slab cache for lock-tree entries */ -static struct kmem_cache *ltree_slab; - -/** * next_sqnum - get next sequence number. * @ubi: UBI device description object * @@ -101,7 +78,7 @@ static unsigned long long next_sqnum(struct ubi_device *ubi) */ static int ubi_get_compat(const struct ubi_device *ubi, int vol_id) { - if (vol_id == UBI_LAYOUT_VOL_ID) + if (vol_id == UBI_LAYOUT_VOLUME_ID) return UBI_LAYOUT_VOLUME_COMPAT; return 0; } @@ -112,20 +89,20 @@ static int ubi_get_compat(const struct ubi_device *ubi, int vol_id) * @vol_id: volume ID * @lnum: logical eraseblock number * - * This function returns a pointer to the corresponding &struct ltree_entry + * This function returns a pointer to the corresponding &struct ubi_ltree_entry * object if the logical eraseblock is locked and %NULL if it is not. * @ubi->ltree_lock has to be locked. */ -static struct ltree_entry *ltree_lookup(struct ubi_device *ubi, int vol_id, - int lnum) +static struct ubi_ltree_entry *ltree_lookup(struct ubi_device *ubi, int vol_id, + int lnum) { struct rb_node *p; p = ubi->ltree.rb_node; while (p) { - struct ltree_entry *le; + struct ubi_ltree_entry *le; - le = rb_entry(p, struct ltree_entry, rb); + le = rb_entry(p, struct ubi_ltree_entry, rb); if (vol_id < le->vol_id) p = p->rb_left; @@ -155,15 +132,17 @@ static struct ltree_entry *ltree_lookup(struct ubi_device *ubi, int vol_id, * Returns pointer to the lock tree entry or %-ENOMEM if memory allocation * failed. */ -static struct ltree_entry *ltree_add_entry(struct ubi_device *ubi, int vol_id, - int lnum) +static struct ubi_ltree_entry *ltree_add_entry(struct ubi_device *ubi, + int vol_id, int lnum) { - struct ltree_entry *le, *le1, *le_free; + struct ubi_ltree_entry *le, *le1, *le_free; - le = kmem_cache_alloc(ltree_slab, GFP_NOFS); + le = kmalloc(sizeof(struct ubi_ltree_entry), GFP_NOFS); if (!le) return ERR_PTR(-ENOMEM); + le->users = 0; + init_rwsem(&le->mutex); le->vol_id = vol_id; le->lnum = lnum; @@ -189,7 +168,7 @@ static struct ltree_entry *ltree_add_entry(struct ubi_device *ubi, int vol_id, p = &ubi->ltree.rb_node; while (*p) { parent = *p; - le1 = rb_entry(parent, struct ltree_entry, rb); + le1 = rb_entry(parent, struct ubi_ltree_entry, rb); if (vol_id < le1->vol_id) p = &(*p)->rb_left; @@ -211,7 +190,7 @@ static struct ltree_entry *ltree_add_entry(struct ubi_device *ubi, int vol_id, spin_unlock(&ubi->ltree_lock); if (le_free) - kmem_cache_free(ltree_slab, le_free); + kfree(le_free); return le; } @@ -227,7 +206,7 @@ static struct ltree_entry *ltree_add_entry(struct ubi_device *ubi, int vol_id, */ static int leb_read_lock(struct ubi_device *ubi, int vol_id, int lnum) { - struct ltree_entry *le; + struct ubi_ltree_entry *le; le = ltree_add_entry(ubi, vol_id, lnum); if (IS_ERR(le)) @@ -245,7 +224,7 @@ static int leb_read_lock(struct ubi_device *ubi, int vol_id, int lnum) static void leb_read_unlock(struct ubi_device *ubi, int vol_id, int lnum) { int free = 0; - struct ltree_entry *le; + struct ubi_ltree_entry *le; spin_lock(&ubi->ltree_lock); le = ltree_lookup(ubi, vol_id, lnum); @@ -259,7 +238,7 @@ static void leb_read_unlock(struct ubi_device *ubi, int vol_id, int lnum) up_read(&le->mutex); if (free) - kmem_cache_free(ltree_slab, le); + kfree(le); } /** @@ -273,7 +252,7 @@ static void leb_read_unlock(struct ubi_device *ubi, int vol_id, int lnum) */ static int leb_write_lock(struct ubi_device *ubi, int vol_id, int lnum) { - struct ltree_entry *le; + struct ubi_ltree_entry *le; le = ltree_add_entry(ubi, vol_id, lnum); if (IS_ERR(le)) @@ -283,6 +262,44 @@ static int leb_write_lock(struct ubi_device *ubi, int vol_id, int lnum) } /** + * leb_write_lock - lock logical eraseblock for writing. + * @ubi: UBI device description object + * @vol_id: volume ID + * @lnum: logical eraseblock number + * + * This function locks a logical eraseblock for writing if there is no + * contention and does nothing if there is contention. Returns %0 in case of + * success, %1 in case of contention, and and a negative error code in case of + * failure. + */ +static int leb_write_trylock(struct ubi_device *ubi, int vol_id, int lnum) +{ + int free; + struct ubi_ltree_entry *le; + + le = ltree_add_entry(ubi, vol_id, lnum); + if (IS_ERR(le)) + return PTR_ERR(le); + if (down_write_trylock(&le->mutex)) + return 0; + + /* Contention, cancel */ + spin_lock(&ubi->ltree_lock); + le->users -= 1; + ubi_assert(le->users >= 0); + if (le->users == 0) { + rb_erase(&le->rb, &ubi->ltree); + free = 1; + } else + free = 0; + spin_unlock(&ubi->ltree_lock); + if (free) + kfree(le); + + return 1; +} + +/** * leb_write_unlock - unlock logical eraseblock. * @ubi: UBI device description object * @vol_id: volume ID @@ -291,7 +308,7 @@ static int leb_write_lock(struct ubi_device *ubi, int vol_id, int lnum) static void leb_write_unlock(struct ubi_device *ubi, int vol_id, int lnum) { int free; - struct ltree_entry *le; + struct ubi_ltree_entry *le; spin_lock(&ubi->ltree_lock); le = ltree_lookup(ubi, vol_id, lnum); @@ -306,23 +323,23 @@ static void leb_write_unlock(struct ubi_device *ubi, int vol_id, int lnum) up_write(&le->mutex); if (free) - kmem_cache_free(ltree_slab, le); + kfree(le); } /** * ubi_eba_unmap_leb - un-map logical eraseblock. * @ubi: UBI device description object - * @vol_id: volume ID + * @vol: volume description object * @lnum: logical eraseblock number * * This function un-maps logical eraseblock @lnum and schedules corresponding * physical eraseblock for erasure. Returns zero in case of success and a * negative error code in case of failure. */ -int ubi_eba_unmap_leb(struct ubi_device *ubi, int vol_id, int lnum) +int ubi_eba_unmap_leb(struct ubi_device *ubi, struct ubi_volume *vol, + int lnum) { - int idx = vol_id2idx(ubi, vol_id), err, pnum; - struct ubi_volume *vol = ubi->volumes[idx]; + int err, pnum, vol_id = vol->vol_id; if (ubi->ro_mode) return -EROFS; @@ -349,7 +366,7 @@ out_unlock: /** * ubi_eba_read_leb - read data. * @ubi: UBI device description object - * @vol_id: volume ID + * @vol: volume description object * @lnum: logical eraseblock number * @buf: buffer to store the read data * @offset: offset from where to read @@ -365,12 +382,11 @@ out_unlock: * returned for any volume type if an ECC error was detected by the MTD device * driver. Other negative error cored may be returned in case of other errors. */ -int ubi_eba_read_leb(struct ubi_device *ubi, int vol_id, int lnum, void *buf, - int offset, int len, int check) +int ubi_eba_read_leb(struct ubi_device *ubi, struct ubi_volume *vol, int lnum, + void *buf, int offset, int len, int check) { - int err, pnum, scrub = 0, idx = vol_id2idx(ubi, vol_id); + int err, pnum, scrub = 0, vol_id = vol->vol_id; struct ubi_vid_hdr *vid_hdr; - struct ubi_volume *vol = ubi->volumes[idx]; uint32_t uninitialized_var(crc); err = leb_read_lock(ubi, vol_id, lnum); @@ -578,7 +594,7 @@ write_error: /** * ubi_eba_write_leb - write data to dynamic volume. * @ubi: UBI device description object - * @vol_id: volume ID + * @vol: volume description object * @lnum: logical eraseblock number * @buf: the data to write * @offset: offset within the logical eraseblock where to write @@ -586,15 +602,14 @@ write_error: * @dtype: data type * * This function writes data to logical eraseblock @lnum of a dynamic volume - * @vol_id. Returns zero in case of success and a negative error code in case + * @vol. Returns zero in case of success and a negative error code in case * of failure. In case of error, it is possible that something was still * written to the flash media, but may be some garbage. */ -int ubi_eba_write_leb(struct ubi_device *ubi, int vol_id, int lnum, +int ubi_eba_write_leb(struct ubi_device *ubi, struct ubi_volume *vol, int lnum, const void *buf, int offset, int len, int dtype) { - int idx = vol_id2idx(ubi, vol_id), err, pnum, tries = 0; - struct ubi_volume *vol = ubi->volumes[idx]; + int err, pnum, tries = 0, vol_id = vol->vol_id; struct ubi_vid_hdr *vid_hdr; if (ubi->ro_mode) @@ -613,7 +628,8 @@ int ubi_eba_write_leb(struct ubi_device *ubi, int vol_id, int lnum, if (err) { ubi_warn("failed to write data to PEB %d", pnum); if (err == -EIO && ubi->bad_allowed) - err = recover_peb(ubi, pnum, vol_id, lnum, buf, offset, len); + err = recover_peb(ubi, pnum, vol_id, lnum, buf, + offset, len); if (err) ubi_ro_mode(ubi); } @@ -656,11 +672,14 @@ retry: goto write_error; } - err = ubi_io_write_data(ubi, buf, pnum, offset, len); - if (err) { - ubi_warn("failed to write %d bytes at offset %d of LEB %d:%d, " - "PEB %d", len, offset, vol_id, lnum, pnum); - goto write_error; + if (len) { + err = ubi_io_write_data(ubi, buf, pnum, offset, len); + if (err) { + ubi_warn("failed to write %d bytes at offset %d of " + "LEB %d:%d, PEB %d", len, offset, vol_id, + lnum, pnum); + goto write_error; + } } vol->eba_tbl[lnum] = pnum; @@ -698,7 +717,7 @@ write_error: /** * ubi_eba_write_leb_st - write data to static volume. * @ubi: UBI device description object - * @vol_id: volume ID + * @vol: volume description object * @lnum: logical eraseblock number * @buf: data to write * @len: how many bytes to write @@ -706,7 +725,7 @@ write_error: * @used_ebs: how many logical eraseblocks will this volume contain * * This function writes data to logical eraseblock @lnum of static volume - * @vol_id. The @used_ebs argument should contain total number of logical + * @vol. The @used_ebs argument should contain total number of logical * eraseblock in this static volume. * * When writing to the last logical eraseblock, the @len argument doesn't have @@ -718,12 +737,11 @@ write_error: * volumes. This function returns zero in case of success and a negative error * code in case of failure. */ -int ubi_eba_write_leb_st(struct ubi_device *ubi, int vol_id, int lnum, - const void *buf, int len, int dtype, int used_ebs) +int ubi_eba_write_leb_st(struct ubi_device *ubi, struct ubi_volume *vol, + int lnum, const void *buf, int len, int dtype, + int used_ebs) { - int err, pnum, tries = 0, data_size = len; - int idx = vol_id2idx(ubi, vol_id); - struct ubi_volume *vol = ubi->volumes[idx]; + int err, pnum, tries = 0, data_size = len, vol_id = vol->vol_id; struct ubi_vid_hdr *vid_hdr; uint32_t crc; @@ -819,7 +837,7 @@ write_error: /* * ubi_eba_atomic_leb_change - change logical eraseblock atomically. * @ubi: UBI device description object - * @vol_id: volume ID + * @vol: volume description object * @lnum: logical eraseblock number * @buf: data to write * @len: how many bytes to write @@ -834,17 +852,27 @@ write_error: * UBI reserves one LEB for the "atomic LEB change" operation, so only one * LEB change may be done at a time. This is ensured by @ubi->alc_mutex. */ -int ubi_eba_atomic_leb_change(struct ubi_device *ubi, int vol_id, int lnum, - const void *buf, int len, int dtype) +int ubi_eba_atomic_leb_change(struct ubi_device *ubi, struct ubi_volume *vol, + int lnum, const void *buf, int len, int dtype) { - int err, pnum, tries = 0, idx = vol_id2idx(ubi, vol_id); - struct ubi_volume *vol = ubi->volumes[idx]; + int err, pnum, tries = 0, vol_id = vol->vol_id; struct ubi_vid_hdr *vid_hdr; uint32_t crc; if (ubi->ro_mode) return -EROFS; + if (len == 0) { + /* + * Special case when data length is zero. In this case the LEB + * has to be unmapped and mapped somewhere else. + */ + err = ubi_eba_unmap_leb(ubi, vol, lnum); + if (err) + return err; + return ubi_eba_write_leb(ubi, vol, lnum, NULL, 0, 0, dtype); + } + vid_hdr = ubi_zalloc_vid_hdr(ubi, GFP_NOFS); if (!vid_hdr) return -ENOMEM; @@ -928,20 +956,6 @@ write_error: } /** - * ltree_entry_ctor - lock tree entries slab cache constructor. - * @obj: the lock-tree entry to construct - * @cache: the lock tree entry slab cache - * @flags: constructor flags - */ -static void ltree_entry_ctor(struct kmem_cache *cache, void *obj) -{ - struct ltree_entry *le = obj; - - le->users = 0; - init_rwsem(&le->mutex); -} - -/** * ubi_eba_copy_leb - copy logical eraseblock. * @ubi: UBI device description object * @from: physical eraseblock number from where to copy @@ -950,14 +964,16 @@ static void ltree_entry_ctor(struct kmem_cache *cache, void *obj) * * This function copies logical eraseblock from physical eraseblock @from to * physical eraseblock @to. The @vid_hdr buffer may be changed by this - * function. Returns zero in case of success, %UBI_IO_BITFLIPS if the operation - * was canceled because bit-flips were detected at the target PEB, and a - * negative error code in case of failure. + * function. Returns: + * o %0 in case of success; + * o %1 if the operation was canceled and should be tried later (e.g., + * because a bit-flip was detected at the target PEB); + * o %2 if the volume is being deleted and this LEB should not be moved. */ int ubi_eba_copy_leb(struct ubi_device *ubi, int from, int to, struct ubi_vid_hdr *vid_hdr) { - int err, vol_id, lnum, data_size, aldata_size, pnum, idx; + int err, vol_id, lnum, data_size, aldata_size, idx; struct ubi_volume *vol; uint32_t crc; @@ -973,51 +989,67 @@ int ubi_eba_copy_leb(struct ubi_device *ubi, int from, int to, data_size = aldata_size = ubi->leb_size - be32_to_cpu(vid_hdr->data_pad); - /* - * We do not want anybody to write to this logical eraseblock while we - * are moving it, so we lock it. - */ - err = leb_write_lock(ubi, vol_id, lnum); - if (err) - return err; - - mutex_lock(&ubi->buf_mutex); - - /* - * But the logical eraseblock might have been put by this time. - * Cancel if it is true. - */ idx = vol_id2idx(ubi, vol_id); - + spin_lock(&ubi->volumes_lock); /* - * We may race with volume deletion/re-size, so we have to hold - * @ubi->volumes_lock. + * Note, we may race with volume deletion, which means that the volume + * this logical eraseblock belongs to might be being deleted. Since the + * volume deletion unmaps all the volume's logical eraseblocks, it will + * be locked in 'ubi_wl_put_peb()' and wait for the WL worker to finish. */ - spin_lock(&ubi->volumes_lock); vol = ubi->volumes[idx]; if (!vol) { - dbg_eba("volume %d was removed meanwhile", vol_id); + /* No need to do further work, cancel */ + dbg_eba("volume %d is being removed, cancel", vol_id); spin_unlock(&ubi->volumes_lock); - goto out_unlock; + return 2; } + spin_unlock(&ubi->volumes_lock); - pnum = vol->eba_tbl[lnum]; - if (pnum != from) { - dbg_eba("LEB %d:%d is no longer mapped to PEB %d, mapped to " - "PEB %d, cancel", vol_id, lnum, from, pnum); - spin_unlock(&ubi->volumes_lock); - goto out_unlock; + /* + * We do not want anybody to write to this logical eraseblock while we + * are moving it, so lock it. + * + * Note, we are using non-waiting locking here, because we cannot sleep + * on the LEB, since it may cause deadlocks. Indeed, imagine a task is + * unmapping the LEB which is mapped to the PEB we are going to move + * (@from). This task locks the LEB and goes sleep in the + * 'ubi_wl_put_peb()' function on the @ubi->move_mutex. In turn, we are + * holding @ubi->move_mutex and go sleep on the LEB lock. So, if the + * LEB is already locked, we just do not move it and return %1. + */ + err = leb_write_trylock(ubi, vol_id, lnum); + if (err) { + dbg_eba("contention on LEB %d:%d, cancel", vol_id, lnum); + return err; } - spin_unlock(&ubi->volumes_lock); - /* OK, now the LEB is locked and we can safely start moving it */ + /* + * The LEB might have been put meanwhile, and the task which put it is + * probably waiting on @ubi->move_mutex. No need to continue the work, + * cancel it. + */ + if (vol->eba_tbl[lnum] != from) { + dbg_eba("LEB %d:%d is no longer mapped to PEB %d, mapped to " + "PEB %d, cancel", vol_id, lnum, from, + vol->eba_tbl[lnum]); + err = 1; + goto out_unlock_leb; + } + /* + * OK, now the LEB is locked and we can safely start moving iy. Since + * this function utilizes thie @ubi->peb1_buf buffer which is shared + * with some other functions, so lock the buffer by taking the + * @ubi->buf_mutex. + */ + mutex_lock(&ubi->buf_mutex); dbg_eba("read %d bytes of data", aldata_size); err = ubi_io_read_data(ubi, ubi->peb_buf1, from, 0, aldata_size); if (err && err != UBI_IO_BITFLIPS) { ubi_warn("error %d while reading data from PEB %d", err, from); - goto out_unlock; + goto out_unlock_buf; } /* @@ -1053,7 +1085,7 @@ int ubi_eba_copy_leb(struct ubi_device *ubi, int from, int to, err = ubi_io_write_vid_hdr(ubi, to, vid_hdr); if (err) - goto out_unlock; + goto out_unlock_buf; cond_resched(); @@ -1062,13 +1094,15 @@ int ubi_eba_copy_leb(struct ubi_device *ubi, int from, int to, if (err) { if (err != UBI_IO_BITFLIPS) ubi_warn("cannot read VID header back from PEB %d", to); - goto out_unlock; + else + err = 1; + goto out_unlock_buf; } if (data_size > 0) { err = ubi_io_write_data(ubi, ubi->peb_buf1, to, 0, aldata_size); if (err) - goto out_unlock; + goto out_unlock_buf; cond_resched(); @@ -1082,7 +1116,9 @@ int ubi_eba_copy_leb(struct ubi_device *ubi, int from, int to, if (err != UBI_IO_BITFLIPS) ubi_warn("cannot read data back from PEB %d", to); - goto out_unlock; + else + err = 1; + goto out_unlock_buf; } cond_resched(); @@ -1090,15 +1126,16 @@ int ubi_eba_copy_leb(struct ubi_device *ubi, int from, int to, if (memcmp(ubi->peb_buf1, ubi->peb_buf2, aldata_size)) { ubi_warn("read data back from PEB %d - it is different", to); - goto out_unlock; + goto out_unlock_buf; } } ubi_assert(vol->eba_tbl[lnum] == from); vol->eba_tbl[lnum] = to; -out_unlock: +out_unlock_buf: mutex_unlock(&ubi->buf_mutex); +out_unlock_leb: leb_write_unlock(ubi, vol_id, lnum); return err; } @@ -1125,14 +1162,6 @@ int ubi_eba_init_scan(struct ubi_device *ubi, struct ubi_scan_info *si) mutex_init(&ubi->alc_mutex); ubi->ltree = RB_ROOT; - if (ubi_devices_cnt == 0) { - ltree_slab = kmem_cache_create("ubi_ltree_slab", - sizeof(struct ltree_entry), 0, - 0, <ree_entry_ctor); - if (!ltree_slab) - return -ENOMEM; - } - ubi->global_sqnum = si->max_sqnum + 1; num_volumes = ubi->vtbl_slots + UBI_INT_VOL_COUNT; @@ -1168,6 +1197,15 @@ int ubi_eba_init_scan(struct ubi_device *ubi, struct ubi_scan_info *si) } } + if (ubi->avail_pebs < EBA_RESERVED_PEBS) { + ubi_err("no enough physical eraseblocks (%d, need %d)", + ubi->avail_pebs, EBA_RESERVED_PEBS); + err = -ENOSPC; + goto out_free; + } + ubi->avail_pebs -= EBA_RESERVED_PEBS; + ubi->rsvd_pebs += EBA_RESERVED_PEBS; + if (ubi->bad_allowed) { ubi_calculate_reserved(ubi); @@ -1184,15 +1222,6 @@ int ubi_eba_init_scan(struct ubi_device *ubi, struct ubi_scan_info *si) ubi->rsvd_pebs += ubi->beb_rsvd_pebs; } - if (ubi->avail_pebs < EBA_RESERVED_PEBS) { - ubi_err("no enough physical eraseblocks (%d, need %d)", - ubi->avail_pebs, EBA_RESERVED_PEBS); - err = -ENOSPC; - goto out_free; - } - ubi->avail_pebs -= EBA_RESERVED_PEBS; - ubi->rsvd_pebs += EBA_RESERVED_PEBS; - dbg_eba("EBA unit is initialized"); return 0; @@ -1202,8 +1231,6 @@ out_free: continue; kfree(ubi->volumes[i]->eba_tbl); } - if (ubi_devices_cnt == 0) - kmem_cache_destroy(ltree_slab); return err; } @@ -1222,6 +1249,4 @@ void ubi_eba_close(const struct ubi_device *ubi) continue; kfree(ubi->volumes[i]->eba_tbl); } - if (ubi_devices_cnt == 1) - kmem_cache_destroy(ltree_slab); } diff --git a/drivers/mtd/ubi/gluebi.c b/drivers/mtd/ubi/gluebi.c index 41ff74c60e14..d397219238d3 100644 --- a/drivers/mtd/ubi/gluebi.c +++ b/drivers/mtd/ubi/gluebi.c @@ -129,8 +129,7 @@ static int gluebi_read(struct mtd_info *mtd, loff_t from, size_t len, if (to_read > total_read) to_read = total_read; - err = ubi_eba_read_leb(ubi, vol->vol_id, lnum, buf, offs, - to_read, 0); + err = ubi_eba_read_leb(ubi, vol, lnum, buf, offs, to_read, 0); if (err) break; @@ -187,8 +186,8 @@ static int gluebi_write(struct mtd_info *mtd, loff_t to, size_t len, if (to_write > total_written) to_write = total_written; - err = ubi_eba_write_leb(ubi, vol->vol_id, lnum, buf, offs, - to_write, UBI_UNKNOWN); + err = ubi_eba_write_leb(ubi, vol, lnum, buf, offs, to_write, + UBI_UNKNOWN); if (err) break; @@ -237,7 +236,7 @@ static int gluebi_erase(struct mtd_info *mtd, struct erase_info *instr) return -EROFS; for (i = 0; i < count; i++) { - err = ubi_eba_unmap_leb(ubi, vol->vol_id, lnum + i); + err = ubi_eba_unmap_leb(ubi, vol, lnum + i); if (err) goto out_err; } diff --git a/drivers/mtd/ubi/io.c b/drivers/mtd/ubi/io.c index 7c304eec78b5..db3efdef2433 100644 --- a/drivers/mtd/ubi/io.c +++ b/drivers/mtd/ubi/io.c @@ -173,6 +173,16 @@ retry: ubi_err("error %d while reading %d bytes from PEB %d:%d, " "read %zd bytes", err, len, pnum, offset, read); ubi_dbg_dump_stack(); + + /* + * The driver should never return -EBADMSG if it failed to read + * all the requested data. But some buggy drivers might do + * this, so we change it to -EIO. + */ + if (read != len && err == -EBADMSG) { + ubi_assert(0); + err = -EIO; + } } else { ubi_assert(len == read); diff --git a/drivers/mtd/ubi/kapi.c b/drivers/mtd/ubi/kapi.c index 03c774f41549..a70d58823f8d 100644 --- a/drivers/mtd/ubi/kapi.c +++ b/drivers/mtd/ubi/kapi.c @@ -30,23 +30,27 @@ * @ubi_num: UBI device number * @di: the information is stored here * - * This function returns %0 in case of success and a %-ENODEV if there is no - * such UBI device. + * This function returns %0 in case of success, %-EINVAL if the UBI device + * number is invalid, and %-ENODEV if there is no such UBI device. */ int ubi_get_device_info(int ubi_num, struct ubi_device_info *di) { - const struct ubi_device *ubi; + struct ubi_device *ubi; + + if (ubi_num < 0 || ubi_num >= UBI_MAX_DEVICES) + return -EINVAL; - if (ubi_num < 0 || ubi_num >= UBI_MAX_DEVICES || - !ubi_devices[ubi_num]) + ubi = ubi_get_device(ubi_num); + if (!ubi) return -ENODEV; - ubi = ubi_devices[ubi_num]; di->ubi_num = ubi->ubi_num; di->leb_size = ubi->leb_size; di->min_io_size = ubi->min_io_size; di->ro_mode = ubi->ro_mode; - di->cdev = MKDEV(ubi->major, 0); + di->cdev = ubi->cdev.dev; + + ubi_put_device(ubi); return 0; } EXPORT_SYMBOL_GPL(ubi_get_device_info); @@ -73,7 +77,7 @@ void ubi_get_volume_info(struct ubi_volume_desc *desc, vi->usable_leb_size = vol->usable_leb_size; vi->name_len = vol->name_len; vi->name = vol->name; - vi->cdev = MKDEV(ubi->major, vi->vol_id + 1); + vi->cdev = vol->cdev.dev; } EXPORT_SYMBOL_GPL(ubi_get_volume_info); @@ -104,37 +108,39 @@ struct ubi_volume_desc *ubi_open_volume(int ubi_num, int vol_id, int mode) dbg_msg("open device %d volume %d, mode %d", ubi_num, vol_id, mode); - err = -ENODEV; - if (ubi_num < 0) - return ERR_PTR(err); - - ubi = ubi_devices[ubi_num]; - - if (!try_module_get(THIS_MODULE)) - return ERR_PTR(err); - - if (ubi_num >= UBI_MAX_DEVICES || !ubi) - goto out_put; + if (ubi_num < 0 || ubi_num >= UBI_MAX_DEVICES) + return ERR_PTR(-EINVAL); - err = -EINVAL; - if (vol_id < 0 || vol_id >= ubi->vtbl_slots) - goto out_put; if (mode != UBI_READONLY && mode != UBI_READWRITE && mode != UBI_EXCLUSIVE) - goto out_put; + return ERR_PTR(-EINVAL); + + /* + * First of all, we have to get the UBI device to prevent its removal. + */ + ubi = ubi_get_device(ubi_num); + if (!ubi) + return ERR_PTR(-ENODEV); + + if (vol_id < 0 || vol_id >= ubi->vtbl_slots) { + err = -EINVAL; + goto out_put_ubi; + } desc = kmalloc(sizeof(struct ubi_volume_desc), GFP_KERNEL); if (!desc) { err = -ENOMEM; - goto out_put; + goto out_put_ubi; } + err = -ENODEV; + if (!try_module_get(THIS_MODULE)) + goto out_free; + spin_lock(&ubi->volumes_lock); vol = ubi->volumes[vol_id]; - if (!vol) { - err = -ENODEV; + if (!vol) goto out_unlock; - } err = -EBUSY; switch (mode) { @@ -156,21 +162,19 @@ struct ubi_volume_desc *ubi_open_volume(int ubi_num, int vol_id, int mode) vol->exclusive = 1; break; } + get_device(&vol->dev); + vol->ref_count += 1; spin_unlock(&ubi->volumes_lock); desc->vol = vol; desc->mode = mode; - /* - * To prevent simultaneous checks of the same volume we use @vtbl_mutex, - * although it is not the purpose it was introduced for. - */ - mutex_lock(&ubi->vtbl_mutex); + mutex_lock(&ubi->ckvol_mutex); if (!vol->checked) { /* This is the first open - check the volume */ err = ubi_check_volume(ubi, vol_id); if (err < 0) { - mutex_unlock(&ubi->vtbl_mutex); + mutex_unlock(&ubi->ckvol_mutex); ubi_close_volume(desc); return ERR_PTR(err); } @@ -181,14 +185,17 @@ struct ubi_volume_desc *ubi_open_volume(int ubi_num, int vol_id, int mode) } vol->checked = 1; } - mutex_unlock(&ubi->vtbl_mutex); + mutex_unlock(&ubi->ckvol_mutex); + return desc; out_unlock: spin_unlock(&ubi->volumes_lock); - kfree(desc); -out_put: module_put(THIS_MODULE); +out_free: + kfree(desc); +out_put_ubi: + ubi_put_device(ubi); return ERR_PTR(err); } EXPORT_SYMBOL_GPL(ubi_open_volume); @@ -205,8 +212,8 @@ struct ubi_volume_desc *ubi_open_volume_nm(int ubi_num, const char *name, int mode) { int i, vol_id = -1, len; - struct ubi_volume_desc *ret; struct ubi_device *ubi; + struct ubi_volume_desc *ret; dbg_msg("open volume %s, mode %d", name, mode); @@ -217,14 +224,12 @@ struct ubi_volume_desc *ubi_open_volume_nm(int ubi_num, const char *name, if (len > UBI_VOL_NAME_MAX) return ERR_PTR(-EINVAL); - ret = ERR_PTR(-ENODEV); - if (!try_module_get(THIS_MODULE)) - return ret; - - if (ubi_num < 0 || ubi_num >= UBI_MAX_DEVICES || !ubi_devices[ubi_num]) - goto out_put; + if (ubi_num < 0 || ubi_num >= UBI_MAX_DEVICES) + return ERR_PTR(-EINVAL); - ubi = ubi_devices[ubi_num]; + ubi = ubi_get_device(ubi_num); + if (!ubi) + return ERR_PTR(-ENODEV); spin_lock(&ubi->volumes_lock); /* Walk all volumes of this UBI device */ @@ -238,13 +243,16 @@ struct ubi_volume_desc *ubi_open_volume_nm(int ubi_num, const char *name, } spin_unlock(&ubi->volumes_lock); - if (vol_id < 0) - goto out_put; + if (vol_id >= 0) + ret = ubi_open_volume(ubi_num, vol_id, mode); + else + ret = ERR_PTR(-ENODEV); - ret = ubi_open_volume(ubi_num, vol_id, mode); - -out_put: - module_put(THIS_MODULE); + /* + * We should put the UBI device even in case of success, because + * 'ubi_open_volume()' took a reference as well. + */ + ubi_put_device(ubi); return ret; } EXPORT_SYMBOL_GPL(ubi_open_volume_nm); @@ -256,10 +264,11 @@ EXPORT_SYMBOL_GPL(ubi_open_volume_nm); void ubi_close_volume(struct ubi_volume_desc *desc) { struct ubi_volume *vol = desc->vol; + struct ubi_device *ubi = vol->ubi; dbg_msg("close volume %d, mode %d", vol->vol_id, desc->mode); - spin_lock(&vol->ubi->volumes_lock); + spin_lock(&ubi->volumes_lock); switch (desc->mode) { case UBI_READONLY: vol->readers -= 1; @@ -270,9 +279,12 @@ void ubi_close_volume(struct ubi_volume_desc *desc) case UBI_EXCLUSIVE: vol->exclusive = 0; } - spin_unlock(&vol->ubi->volumes_lock); + vol->ref_count -= 1; + spin_unlock(&ubi->volumes_lock); kfree(desc); + put_device(&vol->dev); + ubi_put_device(ubi); module_put(THIS_MODULE); } EXPORT_SYMBOL_GPL(ubi_close_volume); @@ -332,7 +344,7 @@ int ubi_leb_read(struct ubi_volume_desc *desc, int lnum, char *buf, int offset, if (len == 0) return 0; - err = ubi_eba_read_leb(ubi, vol_id, lnum, buf, offset, len, check); + err = ubi_eba_read_leb(ubi, vol, lnum, buf, offset, len, check); if (err && err == -EBADMSG && vol->vol_type == UBI_STATIC_VOLUME) { ubi_warn("mark volume %d as corrupted", vol_id); vol->corrupted = 1; @@ -399,7 +411,7 @@ int ubi_leb_write(struct ubi_volume_desc *desc, int lnum, const void *buf, if (len == 0) return 0; - return ubi_eba_write_leb(ubi, vol_id, lnum, buf, offset, len, dtype); + return ubi_eba_write_leb(ubi, vol, lnum, buf, offset, len, dtype); } EXPORT_SYMBOL_GPL(ubi_leb_write); @@ -448,7 +460,7 @@ int ubi_leb_change(struct ubi_volume_desc *desc, int lnum, const void *buf, if (len == 0) return 0; - return ubi_eba_atomic_leb_change(ubi, vol_id, lnum, buf, len, dtype); + return ubi_eba_atomic_leb_change(ubi, vol, lnum, buf, len, dtype); } EXPORT_SYMBOL_GPL(ubi_leb_change); @@ -468,9 +480,9 @@ int ubi_leb_erase(struct ubi_volume_desc *desc, int lnum) { struct ubi_volume *vol = desc->vol; struct ubi_device *ubi = vol->ubi; - int err, vol_id = vol->vol_id; + int err; - dbg_msg("erase LEB %d:%d", vol_id, lnum); + dbg_msg("erase LEB %d:%d", vol->vol_id, lnum); if (desc->mode == UBI_READONLY || vol->vol_type == UBI_STATIC_VOLUME) return -EROFS; @@ -481,7 +493,7 @@ int ubi_leb_erase(struct ubi_volume_desc *desc, int lnum) if (vol->upd_marker) return -EBADF; - err = ubi_eba_unmap_leb(ubi, vol_id, lnum); + err = ubi_eba_unmap_leb(ubi, vol, lnum); if (err) return err; @@ -529,9 +541,8 @@ int ubi_leb_unmap(struct ubi_volume_desc *desc, int lnum) { struct ubi_volume *vol = desc->vol; struct ubi_device *ubi = vol->ubi; - int vol_id = vol->vol_id; - dbg_msg("unmap LEB %d:%d", vol_id, lnum); + dbg_msg("unmap LEB %d:%d", vol->vol_id, lnum); if (desc->mode == UBI_READONLY || vol->vol_type == UBI_STATIC_VOLUME) return -EROFS; @@ -542,11 +553,55 @@ int ubi_leb_unmap(struct ubi_volume_desc *desc, int lnum) if (vol->upd_marker) return -EBADF; - return ubi_eba_unmap_leb(ubi, vol_id, lnum); + return ubi_eba_unmap_leb(ubi, vol, lnum); } EXPORT_SYMBOL_GPL(ubi_leb_unmap); /** + * ubi_leb_map - map logical erasblock to a physical eraseblock. + * @desc: volume descriptor + * @lnum: logical eraseblock number + * @dtype: expected data type + * + * This function maps an un-mapped logical eraseblock @lnum to a physical + * eraseblock. This means, that after a successfull invocation of this + * function the logical eraseblock @lnum will be empty (contain only %0xFF + * bytes) and be mapped to a physical eraseblock, even if an unclean reboot + * happens. + * + * This function returns zero in case of success, %-EBADF if the volume is + * damaged because of an interrupted update, %-EBADMSG if the logical + * eraseblock is already mapped, and other negative error codes in case of + * other failures. + */ +int ubi_leb_map(struct ubi_volume_desc *desc, int lnum, int dtype) +{ + struct ubi_volume *vol = desc->vol; + struct ubi_device *ubi = vol->ubi; + + dbg_msg("unmap LEB %d:%d", vol->vol_id, lnum); + + if (desc->mode == UBI_READONLY || vol->vol_type == UBI_STATIC_VOLUME) + return -EROFS; + + if (lnum < 0 || lnum >= vol->reserved_pebs) + return -EINVAL; + + if (dtype != UBI_LONGTERM && dtype != UBI_SHORTTERM && + dtype != UBI_UNKNOWN) + return -EINVAL; + + if (vol->upd_marker) + return -EBADF; + + if (vol->eba_tbl[lnum] >= 0) + return -EBADMSG; + + return ubi_eba_write_leb(ubi, vol, lnum, NULL, 0, 0, dtype); +} +EXPORT_SYMBOL_GPL(ubi_leb_map); + +/** * ubi_is_mapped - check if logical eraseblock is mapped. * @desc: volume descriptor * @lnum: logical eraseblock number diff --git a/drivers/mtd/ubi/misc.c b/drivers/mtd/ubi/misc.c index 9e2338c8e2cf..93e052812012 100644 --- a/drivers/mtd/ubi/misc.c +++ b/drivers/mtd/ubi/misc.c @@ -79,7 +79,7 @@ int ubi_check_volume(struct ubi_device *ubi, int vol_id) else size = vol->usable_leb_size; - err = ubi_eba_read_leb(ubi, vol_id, i, buf, 0, size, 1); + err = ubi_eba_read_leb(ubi, vol, i, buf, 0, size, 1); if (err) { if (err == -EBADMSG) err = 1; diff --git a/drivers/mtd/ubi/scan.c b/drivers/mtd/ubi/scan.c index c7b0afc9d280..05aa3e7daba1 100644 --- a/drivers/mtd/ubi/scan.c +++ b/drivers/mtd/ubi/scan.c @@ -286,9 +286,14 @@ static int compare_lebs(struct ubi_device *ubi, const struct ubi_scan_leb *seb, * FIXME: but this is anyway obsolete and will be removed at * some point. */ - dbg_bld("using old crappy leb_ver stuff"); + if (v1 == v2) { + ubi_err("PEB %d and PEB %d have the same version %lld", + seb->pnum, pnum, v1); + return -EINVAL; + } + abs = v1 - v2; if (abs < 0) abs = -abs; @@ -390,7 +395,6 @@ out_free_buf: vfree(buf); out_free_vidh: ubi_free_vid_hdr(ubi, vh); - ubi_assert(err < 0); return err; } @@ -769,7 +773,7 @@ struct ubi_scan_leb *ubi_scan_get_free_peb(struct ubi_device *ubi, */ static int process_eb(struct ubi_device *ubi, struct ubi_scan_info *si, int pnum) { - long long ec; + long long uninitialized_var(ec); int err, bitflips = 0, vol_id, ec_corr = 0; dbg_bld("scan PEB %d", pnum); @@ -854,7 +858,7 @@ static int process_eb(struct ubi_device *ubi, struct ubi_scan_info *si, int pnum } vol_id = be32_to_cpu(vidh->vol_id); - if (vol_id > UBI_MAX_VOLUMES && vol_id != UBI_LAYOUT_VOL_ID) { + if (vol_id > UBI_MAX_VOLUMES && vol_id != UBI_LAYOUT_VOLUME_ID) { int lnum = be32_to_cpu(vidh->lnum); /* Unsupported internal volume */ diff --git a/drivers/mtd/ubi/ubi.h b/drivers/mtd/ubi/ubi.h index 5e941a633030..457710615261 100644 --- a/drivers/mtd/ubi/ubi.h +++ b/drivers/mtd/ubi/ubi.h @@ -94,8 +94,43 @@ enum { UBI_IO_BITFLIPS }; -extern int ubi_devices_cnt; -extern struct ubi_device *ubi_devices[]; +/** + * struct ubi_wl_entry - wear-leveling entry. + * @rb: link in the corresponding RB-tree + * @ec: erase counter + * @pnum: physical eraseblock number + * + * This data structure is used in the WL unit. Each physical eraseblock has a + * corresponding &struct wl_entry object which may be kept in different + * RB-trees. See WL unit for details. + */ +struct ubi_wl_entry { + struct rb_node rb; + int ec; + int pnum; +}; + +/** + * struct ubi_ltree_entry - an entry in the lock tree. + * @rb: links RB-tree nodes + * @vol_id: volume ID of the locked logical eraseblock + * @lnum: locked logical eraseblock number + * @users: how many tasks are using this logical eraseblock or wait for it + * @mutex: read/write mutex to implement read/write access serialization to + * the (@vol_id, @lnum) logical eraseblock + * + * This data structure is used in the EBA unit to implement per-LEB locking. + * When a logical eraseblock is being locked - corresponding + * &struct ubi_ltree_entry object is inserted to the lock tree (@ubi->ltree). + * See EBA unit for details. + */ +struct ubi_ltree_entry { + struct rb_node rb; + int vol_id; + int lnum; + int users; + struct rw_semaphore mutex; +}; struct ubi_volume_desc; @@ -105,11 +140,10 @@ struct ubi_volume_desc; * @cdev: character device object to create character device * @ubi: reference to the UBI device description object * @vol_id: volume ID + * @ref_count: volume reference count * @readers: number of users holding this volume in read-only mode * @writers: number of users holding this volume in read-write mode * @exclusive: whether somebody holds this volume in exclusive mode - * @removed: if the volume was removed - * @checked: if this static volume was checked * * @reserved_pebs: how many physical eraseblocks are reserved for this volume * @vol_type: volume type (%UBI_DYNAMIC_VOLUME or %UBI_STATIC_VOLUME) @@ -117,21 +151,30 @@ struct ubi_volume_desc; * @used_ebs: how many logical eraseblocks in this volume contain data * @last_eb_bytes: how many bytes are stored in the last logical eraseblock * @used_bytes: how many bytes of data this volume contains - * @upd_marker: non-zero if the update marker is set for this volume - * @corrupted: non-zero if the volume is corrupted (static volumes only) * @alignment: volume alignment * @data_pad: how many bytes are not used at the end of physical eraseblocks to - * satisfy the requested alignment + * satisfy the requested alignment * @name_len: volume name length * @name: volume name * - * @updating: whether the volume is being updated * @upd_ebs: how many eraseblocks are expected to be updated - * @upd_bytes: how many bytes are expected to be received - * @upd_received: how many update bytes were already received - * @upd_buf: update buffer which is used to collect update data + * @ch_lnum: LEB number which is being changing by the atomic LEB change + * operation + * @ch_dtype: data persistency type which is being changing by the atomic LEB + * change operation + * @upd_bytes: how many bytes are expected to be received for volume update or + * atomic LEB change + * @upd_received: how many bytes were already received for volume update or + * atomic LEB change + * @upd_buf: update buffer which is used to collect update data or data for + * atomic LEB change * * @eba_tbl: EBA table of this volume (LEB->PEB mapping) + * @checked: %1 if this static volume was checked + * @corrupted: %1 if the volume is corrupted (static volumes only) + * @upd_marker: %1 if the update marker is set for this volume + * @updating: %1 if the volume is being updated + * @changing_leb: %1 if the atomic LEB change ioctl command is in progress * * @gluebi_desc: gluebi UBI volume descriptor * @gluebi_refcount: reference count of the gluebi MTD device @@ -150,11 +193,10 @@ struct ubi_volume { struct cdev cdev; struct ubi_device *ubi; int vol_id; + int ref_count; int readers; int writers; int exclusive; - int removed; - int checked; int reserved_pebs; int vol_type; @@ -162,23 +204,31 @@ struct ubi_volume { int used_ebs; int last_eb_bytes; long long used_bytes; - int upd_marker; - int corrupted; int alignment; int data_pad; int name_len; char name[UBI_VOL_NAME_MAX+1]; - int updating; int upd_ebs; + int ch_lnum; + int ch_dtype; long long upd_bytes; long long upd_received; void *upd_buf; int *eba_tbl; + int checked:1; + int corrupted:1; + int upd_marker:1; + int updating:1; + int changing_leb:1; #ifdef CONFIG_MTD_UBI_GLUEBI - /* Gluebi-related stuff may be compiled out */ + /* + * Gluebi-related stuff may be compiled out. + * TODO: this should not be built into UBI but should be a separate + * ubimtd driver which works on top of UBI and emulates MTD devices. + */ struct ubi_volume_desc *gluebi_desc; int gluebi_refcount; struct mtd_info gluebi_mtd; @@ -200,28 +250,31 @@ struct ubi_wl_entry; /** * struct ubi_device - UBI device description structure - * @dev: class device object to use the the Linux device model + * @dev: UBI device object to use the the Linux device model * @cdev: character device object to create character device * @ubi_num: UBI device number * @ubi_name: UBI device name - * @major: character device major number * @vol_count: number of volumes in this UBI device * @volumes: volumes of this UBI device * @volumes_lock: protects @volumes, @rsvd_pebs, @avail_pebs, beb_rsvd_pebs, - * @beb_rsvd_level, @bad_peb_count, @good_peb_count, @vol_count, @vol->readers, - * @vol->writers, @vol->exclusive, @vol->removed, @vol->mapping and - * @vol->eba_tbl. + * @beb_rsvd_level, @bad_peb_count, @good_peb_count, @vol_count, + * @vol->readers, @vol->writers, @vol->exclusive, + * @vol->ref_count, @vol->mapping and @vol->eba_tbl. + * @ref_count: count of references on the UBI device * * @rsvd_pebs: count of reserved physical eraseblocks * @avail_pebs: count of available physical eraseblocks * @beb_rsvd_pebs: how many physical eraseblocks are reserved for bad PEB - * handling + * handling * @beb_rsvd_level: normal level of PEBs reserved for bad PEB handling * + * @autoresize_vol_id: ID of the volume which has to be auto-resized at the end + * of UBI ititializetion * @vtbl_slots: how many slots are available in the volume table * @vtbl_size: size of the volume table in bytes * @vtbl: in-RAM volume table copy - * @vtbl_mutex: protects on-flash volume table + * @volumes_mutex: protects on-flash volume table and serializes volume + * changes, like creation, deletion, update, resize * * @max_ec: current highest erase counter value * @mean_ec: current mean erase counter value @@ -238,15 +291,15 @@ struct ubi_wl_entry; * @prot.pnum: protection tree indexed by physical eraseblock numbers * @prot.aec: protection tree indexed by absolute erase counter value * @wl_lock: protects the @used, @free, @prot, @lookuptbl, @abs_ec, @move_from, - * @move_to, @move_to_put @erase_pending, @wl_scheduled, and @works - * fields + * @move_to, @move_to_put @erase_pending, @wl_scheduled, and @works + * fields + * @move_mutex: serializes eraseblock moves * @wl_scheduled: non-zero if the wear-leveling was scheduled * @lookuptbl: a table to quickly find a &struct ubi_wl_entry object for any - * physical eraseblock + * physical eraseblock * @abs_ec: absolute erase counter * @move_from: physical eraseblock from where the data is being moved * @move_to: physical eraseblock where the data is being moved to - * @move_from_put: if the "from" PEB was put * @move_to_put: if the "to" PEB was put * @works: list of pending works * @works_count: count of pending works @@ -273,13 +326,13 @@ struct ubi_wl_entry; * @hdrs_min_io_size * @vid_hdr_shift: contains @vid_hdr_offset - @vid_hdr_aloffset * @bad_allowed: whether the MTD device admits of bad physical eraseblocks or - * not + * not * @mtd: MTD device descriptor * * @peb_buf1: a buffer of PEB size used for different purposes * @peb_buf2: another buffer of PEB size used for different purposes * @buf_mutex: proptects @peb_buf1 and @peb_buf2 - * @dbg_peb_buf: buffer of PEB size used for debugging + * @dbg_peb_buf: buffer of PEB size used for debugging * @dbg_buf_mutex: proptects @dbg_peb_buf */ struct ubi_device { @@ -287,22 +340,24 @@ struct ubi_device { struct device dev; int ubi_num; char ubi_name[sizeof(UBI_NAME_STR)+5]; - int major; int vol_count; struct ubi_volume *volumes[UBI_MAX_VOLUMES+UBI_INT_VOL_COUNT]; spinlock_t volumes_lock; + int ref_count; int rsvd_pebs; int avail_pebs; int beb_rsvd_pebs; int beb_rsvd_level; + int autoresize_vol_id; int vtbl_slots; int vtbl_size; struct ubi_vtbl_record *vtbl; - struct mutex vtbl_mutex; + struct mutex volumes_mutex; int max_ec; + /* TODO: mean_ec is not updated run-time, fix */ int mean_ec; /* EBA unit's stuff */ @@ -320,12 +375,13 @@ struct ubi_device { struct rb_root aec; } prot; spinlock_t wl_lock; + struct mutex move_mutex; + struct rw_semaphore work_sem; int wl_scheduled; struct ubi_wl_entry **lookuptbl; unsigned long long abs_ec; struct ubi_wl_entry *move_from; struct ubi_wl_entry *move_to; - int move_from_put; int move_to_put; struct list_head works; int works_count; @@ -355,15 +411,19 @@ struct ubi_device { void *peb_buf1; void *peb_buf2; struct mutex buf_mutex; + struct mutex ckvol_mutex; #ifdef CONFIG_MTD_UBI_DEBUG void *dbg_peb_buf; struct mutex dbg_buf_mutex; #endif }; +extern struct kmem_cache *ubi_wl_entry_slab; +extern struct file_operations ubi_ctrl_cdev_operations; extern struct file_operations ubi_cdev_operations; extern struct file_operations ubi_vol_cdev_operations; extern struct class *ubi_class; +extern struct mutex ubi_devices_mutex; /* vtbl.c */ int ubi_change_vtbl_record(struct ubi_device *ubi, int idx, @@ -374,13 +434,18 @@ int ubi_read_volume_table(struct ubi_device *ubi, struct ubi_scan_info *si); int ubi_create_volume(struct ubi_device *ubi, struct ubi_mkvol_req *req); int ubi_remove_volume(struct ubi_volume_desc *desc); int ubi_resize_volume(struct ubi_volume_desc *desc, int reserved_pebs); -int ubi_add_volume(struct ubi_device *ubi, int vol_id); -void ubi_free_volume(struct ubi_device *ubi, int vol_id); +int ubi_add_volume(struct ubi_device *ubi, struct ubi_volume *vol); +void ubi_free_volume(struct ubi_device *ubi, struct ubi_volume *vol); /* upd.c */ -int ubi_start_update(struct ubi_device *ubi, int vol_id, long long bytes); -int ubi_more_update_data(struct ubi_device *ubi, int vol_id, +int ubi_start_update(struct ubi_device *ubi, struct ubi_volume *vol, + long long bytes); +int ubi_more_update_data(struct ubi_device *ubi, struct ubi_volume *vol, const void __user *buf, int count); +int ubi_start_leb_change(struct ubi_device *ubi, struct ubi_volume *vol, + const struct ubi_leb_change_req *req); +int ubi_more_leb_change_data(struct ubi_device *ubi, struct ubi_volume *vol, + const void __user *buf, int count); /* misc.c */ int ubi_calc_data_len(const struct ubi_device *ubi, const void *buf, int length); @@ -399,16 +464,17 @@ void ubi_gluebi_updated(struct ubi_volume *vol); #endif /* eba.c */ -int ubi_eba_unmap_leb(struct ubi_device *ubi, int vol_id, int lnum); -int ubi_eba_read_leb(struct ubi_device *ubi, int vol_id, int lnum, void *buf, - int offset, int len, int check); -int ubi_eba_write_leb(struct ubi_device *ubi, int vol_id, int lnum, +int ubi_eba_unmap_leb(struct ubi_device *ubi, struct ubi_volume *vol, + int lnum); +int ubi_eba_read_leb(struct ubi_device *ubi, struct ubi_volume *vol, int lnum, + void *buf, int offset, int len, int check); +int ubi_eba_write_leb(struct ubi_device *ubi, struct ubi_volume *vol, int lnum, const void *buf, int offset, int len, int dtype); -int ubi_eba_write_leb_st(struct ubi_device *ubi, int vol_id, int lnum, - const void *buf, int len, int dtype, +int ubi_eba_write_leb_st(struct ubi_device *ubi, struct ubi_volume *vol, + int lnum, const void *buf, int len, int dtype, int used_ebs); -int ubi_eba_atomic_leb_change(struct ubi_device *ubi, int vol_id, int lnum, - const void *buf, int len, int dtype); +int ubi_eba_atomic_leb_change(struct ubi_device *ubi, struct ubi_volume *vol, + int lnum, const void *buf, int len, int dtype); int ubi_eba_copy_leb(struct ubi_device *ubi, int from, int to, struct ubi_vid_hdr *vid_hdr); int ubi_eba_init_scan(struct ubi_device *ubi, struct ubi_scan_info *si); @@ -421,6 +487,7 @@ int ubi_wl_flush(struct ubi_device *ubi); int ubi_wl_scrub_peb(struct ubi_device *ubi, int pnum); int ubi_wl_init_scan(struct ubi_device *ubi, struct ubi_scan_info *si); void ubi_wl_close(struct ubi_device *ubi); +int ubi_thread(void *u); /* io.c */ int ubi_io_read(const struct ubi_device *ubi, void *buf, int pnum, int offset, @@ -439,6 +506,14 @@ int ubi_io_read_vid_hdr(struct ubi_device *ubi, int pnum, int ubi_io_write_vid_hdr(struct ubi_device *ubi, int pnum, struct ubi_vid_hdr *vid_hdr); +/* build.c */ +int ubi_attach_mtd_dev(struct mtd_info *mtd, int ubi_num, int vid_hdr_offset); +int ubi_detach_mtd_dev(int ubi_num, int anyway); +struct ubi_device *ubi_get_device(int ubi_num); +void ubi_put_device(struct ubi_device *ubi); +struct ubi_device *ubi_get_by_major(int major); +int ubi_major2num(int major); + /* * ubi_rb_for_each_entry - walk an RB-tree. * @rb: a pointer to type 'struct rb_node' to to use as a loop counter @@ -523,8 +598,10 @@ static inline int ubi_io_write_data(struct ubi_device *ubi, const void *buf, */ static inline void ubi_ro_mode(struct ubi_device *ubi) { - ubi->ro_mode = 1; - ubi_warn("switch to read-only mode"); + if (!ubi->ro_mode) { + ubi->ro_mode = 1; + ubi_warn("switch to read-only mode"); + } } /** diff --git a/drivers/mtd/ubi/upd.c b/drivers/mtd/ubi/upd.c index 0efc586a8328..ddaa1a56cc69 100644 --- a/drivers/mtd/ubi/upd.c +++ b/drivers/mtd/ubi/upd.c @@ -22,7 +22,8 @@ */ /* - * This file contains implementation of the volume update functionality. + * This file contains implementation of the volume update and atomic LEB change + * functionality. * * The update operation is based on the per-volume update marker which is * stored in the volume table. The update marker is set before the update @@ -45,29 +46,31 @@ /** * set_update_marker - set update marker. * @ubi: UBI device description object - * @vol_id: volume ID + * @vol: volume description object * - * This function sets the update marker flag for volume @vol_id. Returns zero + * This function sets the update marker flag for volume @vol. Returns zero * in case of success and a negative error code in case of failure. */ -static int set_update_marker(struct ubi_device *ubi, int vol_id) +static int set_update_marker(struct ubi_device *ubi, struct ubi_volume *vol) { int err; struct ubi_vtbl_record vtbl_rec; - struct ubi_volume *vol = ubi->volumes[vol_id]; - dbg_msg("set update marker for volume %d", vol_id); + dbg_msg("set update marker for volume %d", vol->vol_id); if (vol->upd_marker) { - ubi_assert(ubi->vtbl[vol_id].upd_marker); + ubi_assert(ubi->vtbl[vol->vol_id].upd_marker); dbg_msg("already set"); return 0; } - memcpy(&vtbl_rec, &ubi->vtbl[vol_id], sizeof(struct ubi_vtbl_record)); + memcpy(&vtbl_rec, &ubi->vtbl[vol->vol_id], + sizeof(struct ubi_vtbl_record)); vtbl_rec.upd_marker = 1; - err = ubi_change_vtbl_record(ubi, vol_id, &vtbl_rec); + mutex_lock(&ubi->volumes_mutex); + err = ubi_change_vtbl_record(ubi, vol->vol_id, &vtbl_rec); + mutex_unlock(&ubi->volumes_mutex); vol->upd_marker = 1; return err; } @@ -75,23 +78,24 @@ static int set_update_marker(struct ubi_device *ubi, int vol_id) /** * clear_update_marker - clear update marker. * @ubi: UBI device description object - * @vol_id: volume ID + * @vol: volume description object * @bytes: new data size in bytes * - * This function clears the update marker for volume @vol_id, sets new volume + * This function clears the update marker for volume @vol, sets new volume * data size and clears the "corrupted" flag (static volumes only). Returns * zero in case of success and a negative error code in case of failure. */ -static int clear_update_marker(struct ubi_device *ubi, int vol_id, long long bytes) +static int clear_update_marker(struct ubi_device *ubi, struct ubi_volume *vol, + long long bytes) { int err; uint64_t tmp; struct ubi_vtbl_record vtbl_rec; - struct ubi_volume *vol = ubi->volumes[vol_id]; - dbg_msg("clear update marker for volume %d", vol_id); + dbg_msg("clear update marker for volume %d", vol->vol_id); - memcpy(&vtbl_rec, &ubi->vtbl[vol_id], sizeof(struct ubi_vtbl_record)); + memcpy(&vtbl_rec, &ubi->vtbl[vol->vol_id], + sizeof(struct ubi_vtbl_record)); ubi_assert(vol->upd_marker && vtbl_rec.upd_marker); vtbl_rec.upd_marker = 0; @@ -106,7 +110,9 @@ static int clear_update_marker(struct ubi_device *ubi, int vol_id, long long byt vol->last_eb_bytes = vol->usable_leb_size; } - err = ubi_change_vtbl_record(ubi, vol_id, &vtbl_rec); + mutex_lock(&ubi->volumes_mutex); + err = ubi_change_vtbl_record(ubi, vol->vol_id, &vtbl_rec); + mutex_unlock(&ubi->volumes_mutex); vol->upd_marker = 0; return err; } @@ -114,35 +120,36 @@ static int clear_update_marker(struct ubi_device *ubi, int vol_id, long long byt /** * ubi_start_update - start volume update. * @ubi: UBI device description object - * @vol_id: volume ID + * @vol: volume description object * @bytes: update bytes * * This function starts volume update operation. If @bytes is zero, the volume * is just wiped out. Returns zero in case of success and a negative error code * in case of failure. */ -int ubi_start_update(struct ubi_device *ubi, int vol_id, long long bytes) +int ubi_start_update(struct ubi_device *ubi, struct ubi_volume *vol, + long long bytes) { int i, err; uint64_t tmp; - struct ubi_volume *vol = ubi->volumes[vol_id]; - dbg_msg("start update of volume %d, %llu bytes", vol_id, bytes); + dbg_msg("start update of volume %d, %llu bytes", vol->vol_id, bytes); + ubi_assert(!vol->updating && !vol->changing_leb); vol->updating = 1; - err = set_update_marker(ubi, vol_id); + err = set_update_marker(ubi, vol); if (err) return err; /* Before updating - wipe out the volume */ for (i = 0; i < vol->reserved_pebs; i++) { - err = ubi_eba_unmap_leb(ubi, vol_id, i); + err = ubi_eba_unmap_leb(ubi, vol, i); if (err) return err; } if (bytes == 0) { - err = clear_update_marker(ubi, vol_id, 0); + err = clear_update_marker(ubi, vol, 0); if (err) return err; err = ubi_wl_flush(ubi); @@ -163,9 +170,42 @@ int ubi_start_update(struct ubi_device *ubi, int vol_id, long long bytes) } /** + * ubi_start_leb_change - start atomic LEB change. + * @ubi: UBI device description object + * @vol: volume description object + * @req: operation request + * + * This function starts atomic LEB change operation. Returns zero in case of + * success and a negative error code in case of failure. + */ +int ubi_start_leb_change(struct ubi_device *ubi, struct ubi_volume *vol, + const struct ubi_leb_change_req *req) +{ + ubi_assert(!vol->updating && !vol->changing_leb); + + dbg_msg("start changing LEB %d:%d, %u bytes", + vol->vol_id, req->lnum, req->bytes); + if (req->bytes == 0) + return ubi_eba_atomic_leb_change(ubi, vol, req->lnum, NULL, 0, + req->dtype); + + vol->upd_bytes = req->bytes; + vol->upd_received = 0; + vol->changing_leb = 1; + vol->ch_lnum = req->lnum; + vol->ch_dtype = req->dtype; + + vol->upd_buf = vmalloc(req->bytes); + if (!vol->upd_buf) + return -ENOMEM; + + return 0; +} + +/** * write_leb - write update data. * @ubi: UBI device description object - * @vol_id: volume ID + * @vol: volume description object * @lnum: logical eraseblock number * @buf: data to write * @len: data size @@ -191,26 +231,22 @@ int ubi_start_update(struct ubi_device *ubi, int vol_id, long long bytes) * This function returns zero in case of success and a negative error code in * case of failure. */ -static int write_leb(struct ubi_device *ubi, int vol_id, int lnum, void *buf, - int len, int used_ebs) +static int write_leb(struct ubi_device *ubi, struct ubi_volume *vol, int lnum, + void *buf, int len, int used_ebs) { - int err, l; - struct ubi_volume *vol = ubi->volumes[vol_id]; + int err; if (vol->vol_type == UBI_DYNAMIC_VOLUME) { - l = ALIGN(len, ubi->min_io_size); - memset(buf + len, 0xFF, l - len); + len = ALIGN(len, ubi->min_io_size); + memset(buf + len, 0xFF, len - len); - l = ubi_calc_data_len(ubi, buf, l); - if (l == 0) { + len = ubi_calc_data_len(ubi, buf, len); + if (len == 0) { dbg_msg("all %d bytes contain 0xFF - skip", len); return 0; } - if (len != l) - dbg_msg("skip last %d bytes (0xFF)", len - l); - err = ubi_eba_write_leb(ubi, vol_id, lnum, buf, 0, l, - UBI_UNKNOWN); + err = ubi_eba_write_leb(ubi, vol, lnum, buf, 0, len, UBI_UNKNOWN); } else { /* * When writing static volume, and this is the last logical @@ -222,7 +258,7 @@ static int write_leb(struct ubi_device *ubi, int vol_id, int lnum, void *buf, * contain zeros, not random trash. */ memset(buf + len, 0, vol->usable_leb_size - len); - err = ubi_eba_write_leb_st(ubi, vol_id, lnum, buf, len, + err = ubi_eba_write_leb_st(ubi, vol, lnum, buf, len, UBI_UNKNOWN, used_ebs); } @@ -236,16 +272,15 @@ static int write_leb(struct ubi_device *ubi, int vol_id, int lnum, void *buf, * @count: how much bytes to write * * This function writes more data to the volume which is being updated. It may - * be called arbitrary number of times until all of the update data arrive. - * This function returns %0 in case of success, number of bytes written during - * the last call if the whole volume update was successfully finished, and a + * be called arbitrary number of times until all the update data arriveis. This + * function returns %0 in case of success, number of bytes written during the + * last call if the whole volume update has been successfully finished, and a * negative error code in case of failure. */ -int ubi_more_update_data(struct ubi_device *ubi, int vol_id, +int ubi_more_update_data(struct ubi_device *ubi, struct ubi_volume *vol, const void __user *buf, int count) { uint64_t tmp; - struct ubi_volume *vol = ubi->volumes[vol_id]; int lnum, offs, err = 0, len, to_write = count; dbg_msg("write %d of %lld bytes, %lld already passed", @@ -290,8 +325,8 @@ int ubi_more_update_data(struct ubi_device *ubi, int vol_id, * is the last chunk, it's time to flush the buffer. */ ubi_assert(flush_len <= vol->usable_leb_size); - err = write_leb(ubi, vol_id, lnum, vol->upd_buf, - flush_len, vol->upd_ebs); + err = write_leb(ubi, vol, lnum, vol->upd_buf, flush_len, + vol->upd_ebs); if (err) return err; } @@ -318,8 +353,8 @@ int ubi_more_update_data(struct ubi_device *ubi, int vol_id, if (len == vol->usable_leb_size || vol->upd_received + len == vol->upd_bytes) { - err = write_leb(ubi, vol_id, lnum, vol->upd_buf, len, - vol->upd_ebs); + err = write_leb(ubi, vol, lnum, vol->upd_buf, + len, vol->upd_ebs); if (err) break; } @@ -333,16 +368,70 @@ int ubi_more_update_data(struct ubi_device *ubi, int vol_id, ubi_assert(vol->upd_received <= vol->upd_bytes); if (vol->upd_received == vol->upd_bytes) { /* The update is finished, clear the update marker */ - err = clear_update_marker(ubi, vol_id, vol->upd_bytes); + err = clear_update_marker(ubi, vol, vol->upd_bytes); if (err) return err; err = ubi_wl_flush(ubi); if (err == 0) { + vol->updating = 0; err = to_write; vfree(vol->upd_buf); - vol->updating = 0; } } return err; } + +/** + * ubi_more_leb_change_data - accept more data for atomic LEB change. + * @vol: volume description object + * @buf: write data (user-space memory buffer) + * @count: how much bytes to write + * + * This function accepts more data to the volume which is being under the + * "atomic LEB change" operation. It may be called arbitrary number of times + * until all data arrives. This function returns %0 in case of success, number + * of bytes written during the last call if the whole "atomic LEB change" + * operation has been successfully finished, and a negative error code in case + * of failure. + */ +int ubi_more_leb_change_data(struct ubi_device *ubi, struct ubi_volume *vol, + const void __user *buf, int count) +{ + int err; + + dbg_msg("write %d of %lld bytes, %lld already passed", + count, vol->upd_bytes, vol->upd_received); + + if (ubi->ro_mode) + return -EROFS; + + if (vol->upd_received + count > vol->upd_bytes) + count = vol->upd_bytes - vol->upd_received; + + err = copy_from_user(vol->upd_buf + vol->upd_received, buf, count); + if (err) + return -EFAULT; + + vol->upd_received += count; + + if (vol->upd_received == vol->upd_bytes) { + int len = ALIGN((int)vol->upd_bytes, ubi->min_io_size); + + memset(vol->upd_buf + vol->upd_bytes, 0xFF, len - vol->upd_bytes); + len = ubi_calc_data_len(ubi, vol->upd_buf, len); + err = ubi_eba_atomic_leb_change(ubi, vol, vol->ch_lnum, + vol->upd_buf, len, UBI_UNKNOWN); + if (err) + return err; + } + + ubi_assert(vol->upd_received <= vol->upd_bytes); + if (vol->upd_received == vol->upd_bytes) { + vol->changing_leb = 0; + err = count; + vfree(vol->upd_buf); + } + + return err; +} diff --git a/drivers/mtd/ubi/vmt.c b/drivers/mtd/ubi/vmt.c index 88629a320c2b..a3ca2257e601 100644 --- a/drivers/mtd/ubi/vmt.c +++ b/drivers/mtd/ubi/vmt.c @@ -63,21 +63,30 @@ static struct device_attribute attr_vol_upd_marker = * B. process 2 removes volume Y; * C. process 1 starts reading the /<sysfs>/class/ubi/ubiX_Y/reserved_ebs file; * - * What we want to do in a situation like that is to return error when the file - * is read. This is done by means of the 'removed' flag and the 'vol_lock' of - * the UBI volume description object. + * In this situation, this function will return %-ENODEV because it will find + * out that the volume was removed from the @ubi->volumes array. */ static ssize_t vol_attribute_show(struct device *dev, struct device_attribute *attr, char *buf) { int ret; struct ubi_volume *vol = container_of(dev, struct ubi_volume, dev); + struct ubi_device *ubi; - spin_lock(&vol->ubi->volumes_lock); - if (vol->removed) { - spin_unlock(&vol->ubi->volumes_lock); + ubi = ubi_get_device(vol->ubi->ubi_num); + if (!ubi) + return -ENODEV; + + spin_lock(&ubi->volumes_lock); + if (!ubi->volumes[vol->vol_id]) { + spin_unlock(&ubi->volumes_lock); + ubi_put_device(ubi); return -ENODEV; } + /* Take a reference to prevent volume removal */ + vol->ref_count += 1; + spin_unlock(&ubi->volumes_lock); + if (attr == &attr_vol_reserved_ebs) ret = sprintf(buf, "%d\n", vol->reserved_pebs); else if (attr == &attr_vol_type) { @@ -94,15 +103,22 @@ static ssize_t vol_attribute_show(struct device *dev, ret = sprintf(buf, "%d\n", vol->corrupted); else if (attr == &attr_vol_alignment) ret = sprintf(buf, "%d\n", vol->alignment); - else if (attr == &attr_vol_usable_eb_size) { + else if (attr == &attr_vol_usable_eb_size) ret = sprintf(buf, "%d\n", vol->usable_leb_size); - } else if (attr == &attr_vol_data_bytes) + else if (attr == &attr_vol_data_bytes) ret = sprintf(buf, "%lld\n", vol->used_bytes); else if (attr == &attr_vol_upd_marker) ret = sprintf(buf, "%d\n", vol->upd_marker); else - BUG(); - spin_unlock(&vol->ubi->volumes_lock); + /* This must be a bug */ + ret = -EINVAL; + + /* We've done the operation, drop volume and UBI device references */ + spin_lock(&ubi->volumes_lock); + vol->ref_count -= 1; + ubi_assert(vol->ref_count >= 0); + spin_unlock(&ubi->volumes_lock); + ubi_put_device(ubi); return ret; } @@ -110,7 +126,7 @@ static ssize_t vol_attribute_show(struct device *dev, static void vol_release(struct device *dev) { struct ubi_volume *vol = container_of(dev, struct ubi_volume, dev); - ubi_assert(vol->removed); + kfree(vol); } @@ -152,9 +168,7 @@ static int volume_sysfs_init(struct ubi_device *ubi, struct ubi_volume *vol) if (err) return err; err = device_create_file(&vol->dev, &attr_vol_upd_marker); - if (err) - return err; - return 0; + return err; } /** @@ -180,16 +194,18 @@ static void volume_sysfs_close(struct ubi_volume *vol) * @req: volume creation request * * This function creates volume described by @req. If @req->vol_id id - * %UBI_VOL_NUM_AUTO, this function automatically assigne ID to the new volume + * %UBI_VOL_NUM_AUTO, this function automatically assign ID to the new volume * and saves it in @req->vol_id. Returns zero in case of success and a negative - * error code in case of failure. + * error code in case of failure. Note, the caller has to have the + * @ubi->volumes_mutex locked. */ int ubi_create_volume(struct ubi_device *ubi, struct ubi_mkvol_req *req) { - int i, err, vol_id = req->vol_id; + int i, err, vol_id = req->vol_id, dont_free = 0; struct ubi_volume *vol; struct ubi_vtbl_record vtbl_rec; uint64_t bytes; + dev_t dev; if (ubi->ro_mode) return -EROFS; @@ -199,7 +215,6 @@ int ubi_create_volume(struct ubi_device *ubi, struct ubi_mkvol_req *req) return -ENOMEM; spin_lock(&ubi->volumes_lock); - if (vol_id == UBI_VOL_NUM_AUTO) { /* Find unused volume ID */ dbg_msg("search for vacant volume ID"); @@ -252,6 +267,7 @@ int ubi_create_volume(struct ubi_device *ubi, struct ubi_mkvol_req *req) } ubi->avail_pebs -= vol->reserved_pebs; ubi->rsvd_pebs += vol->reserved_pebs; + spin_unlock(&ubi->volumes_lock); vol->vol_id = vol_id; vol->alignment = req->alignment; @@ -259,10 +275,7 @@ int ubi_create_volume(struct ubi_device *ubi, struct ubi_mkvol_req *req) vol->vol_type = req->vol_type; vol->name_len = req->name_len; memcpy(vol->name, req->name, vol->name_len + 1); - vol->exclusive = 1; vol->ubi = ubi; - ubi->volumes[vol_id] = vol; - spin_unlock(&ubi->volumes_lock); /* * Finish all pending erases because there may be some LEBs belonging @@ -299,9 +312,10 @@ int ubi_create_volume(struct ubi_device *ubi, struct ubi_mkvol_req *req) /* Register character device for the volume */ cdev_init(&vol->cdev, &ubi_vol_cdev_operations); vol->cdev.owner = THIS_MODULE; - err = cdev_add(&vol->cdev, MKDEV(ubi->major, vol_id + 1), 1); + dev = MKDEV(MAJOR(ubi->cdev.dev), vol_id + 1); + err = cdev_add(&vol->cdev, dev, 1); if (err) { - ubi_err("cannot add character device for volume %d", vol_id); + ubi_err("cannot add character device"); goto out_mapping; } @@ -311,12 +325,15 @@ int ubi_create_volume(struct ubi_device *ubi, struct ubi_mkvol_req *req) vol->dev.release = vol_release; vol->dev.parent = &ubi->dev; - vol->dev.devt = MKDEV(ubi->major, vol->vol_id + 1); + vol->dev.devt = dev; vol->dev.class = ubi_class; + sprintf(&vol->dev.bus_id[0], "%s_%d", ubi->ubi_name, vol->vol_id); err = device_register(&vol->dev); - if (err) + if (err) { + ubi_err("cannot register device"); goto out_gluebi; + } err = volume_sysfs_init(ubi, vol); if (err) @@ -339,15 +356,27 @@ int ubi_create_volume(struct ubi_device *ubi, struct ubi_mkvol_req *req) goto out_sysfs; spin_lock(&ubi->volumes_lock); + ubi->volumes[vol_id] = vol; ubi->vol_count += 1; - vol->exclusive = 0; spin_unlock(&ubi->volumes_lock); paranoid_check_volumes(ubi); return 0; +out_sysfs: + /* + * We have registered our device, we should not free the volume* + * description object in this function in case of an error - it is + * freed by the release function. + * + * Get device reference to prevent the release function from being + * called just after sysfs has been closed. + */ + dont_free = 1; + get_device(&vol->dev); + volume_sysfs_close(vol); out_gluebi: - err = ubi_destroy_gluebi(vol); + ubi_destroy_gluebi(vol); out_cdev: cdev_del(&vol->cdev); out_mapping: @@ -356,26 +385,13 @@ out_acc: spin_lock(&ubi->volumes_lock); ubi->rsvd_pebs -= vol->reserved_pebs; ubi->avail_pebs += vol->reserved_pebs; - ubi->volumes[vol_id] = NULL; out_unlock: spin_unlock(&ubi->volumes_lock); - kfree(vol); - return err; - - /* - * We are registered, so @vol is destroyed in the release function and - * we have to de-initialize differently. - */ -out_sysfs: - err = ubi_destroy_gluebi(vol); - cdev_del(&vol->cdev); - kfree(vol->eba_tbl); - spin_lock(&ubi->volumes_lock); - ubi->rsvd_pebs -= vol->reserved_pebs; - ubi->avail_pebs += vol->reserved_pebs; - ubi->volumes[vol_id] = NULL; - spin_unlock(&ubi->volumes_lock); - volume_sysfs_close(vol); + if (dont_free) + put_device(&vol->dev); + else + kfree(vol); + ubi_err("cannot create volume %d, error %d", vol_id, err); return err; } @@ -385,7 +401,8 @@ out_sysfs: * * This function removes volume described by @desc. The volume has to be opened * in "exclusive" mode. Returns zero in case of success and a negative error - * code in case of failure. + * code in case of failure. The caller has to have the @ubi->volumes_mutex + * locked. */ int ubi_remove_volume(struct ubi_volume_desc *desc) { @@ -400,30 +417,36 @@ int ubi_remove_volume(struct ubi_volume_desc *desc) if (ubi->ro_mode) return -EROFS; + spin_lock(&ubi->volumes_lock); + if (vol->ref_count > 1) { + /* + * The volume is busy, probably someone is reading one of its + * sysfs files. + */ + err = -EBUSY; + goto out_unlock; + } + ubi->volumes[vol_id] = NULL; + spin_unlock(&ubi->volumes_lock); + err = ubi_destroy_gluebi(vol); if (err) - return err; + goto out_err; err = ubi_change_vtbl_record(ubi, vol_id, NULL); if (err) - return err; + goto out_err; for (i = 0; i < vol->reserved_pebs; i++) { - err = ubi_eba_unmap_leb(ubi, vol_id, i); + err = ubi_eba_unmap_leb(ubi, vol, i); if (err) - return err; + goto out_err; } - spin_lock(&ubi->volumes_lock); - vol->removed = 1; - ubi->volumes[vol_id] = NULL; - spin_unlock(&ubi->volumes_lock); - kfree(vol->eba_tbl); vol->eba_tbl = NULL; cdev_del(&vol->cdev); volume_sysfs_close(vol); - kfree(desc); spin_lock(&ubi->volumes_lock); ubi->rsvd_pebs -= reserved_pebs; @@ -441,8 +464,15 @@ int ubi_remove_volume(struct ubi_volume_desc *desc) spin_unlock(&ubi->volumes_lock); paranoid_check_volumes(ubi); - module_put(THIS_MODULE); return 0; + +out_err: + ubi_err("cannot remove volume %d, error %d", vol_id, err); + spin_lock(&ubi->volumes_lock); + ubi->volumes[vol_id] = vol; +out_unlock: + spin_unlock(&ubi->volumes_lock); + return err; } /** @@ -450,8 +480,9 @@ int ubi_remove_volume(struct ubi_volume_desc *desc) * @desc: volume descriptor * @reserved_pebs: new size in physical eraseblocks * - * This function returns zero in case of success, and a negative error code in - * case of failure. + * This function re-sizes the volume and returns zero in case of success, and a + * negative error code in case of failure. The caller has to have the + * @ubi->volumes_mutex locked. */ int ubi_resize_volume(struct ubi_volume_desc *desc, int reserved_pebs) { @@ -466,8 +497,6 @@ int ubi_resize_volume(struct ubi_volume_desc *desc, int reserved_pebs) dbg_msg("re-size volume %d to from %d to %d PEBs", vol_id, vol->reserved_pebs, reserved_pebs); - ubi_assert(desc->mode == UBI_EXCLUSIVE); - ubi_assert(vol == ubi->volumes[vol_id]); if (vol->vol_type == UBI_STATIC_VOLUME && reserved_pebs < vol->used_ebs) { @@ -487,6 +516,14 @@ int ubi_resize_volume(struct ubi_volume_desc *desc, int reserved_pebs) for (i = 0; i < reserved_pebs; i++) new_mapping[i] = UBI_LEB_UNMAPPED; + spin_lock(&ubi->volumes_lock); + if (vol->ref_count > 1) { + spin_unlock(&ubi->volumes_lock); + err = -EBUSY; + goto out_free; + } + spin_unlock(&ubi->volumes_lock); + /* Reserve physical eraseblocks */ pebs = reserved_pebs - vol->reserved_pebs; if (pebs > 0) { @@ -516,7 +553,7 @@ int ubi_resize_volume(struct ubi_volume_desc *desc, int reserved_pebs) if (pebs < 0) { for (i = 0; i < -pebs; i++) { - err = ubi_eba_unmap_leb(ubi, vol_id, reserved_pebs + i); + err = ubi_eba_unmap_leb(ubi, vol, reserved_pebs + i); if (err) goto out_acc; } @@ -565,27 +602,28 @@ out_free: /** * ubi_add_volume - add volume. * @ubi: UBI device description object - * @vol_id: volume ID + * @vol: volume description object * - * This function adds an existin volume and initializes all its data - * structures. Returnes zero in case of success and a negative error code in + * This function adds an existing volume and initializes all its data + * structures. Returns zero in case of success and a negative error code in * case of failure. */ -int ubi_add_volume(struct ubi_device *ubi, int vol_id) +int ubi_add_volume(struct ubi_device *ubi, struct ubi_volume *vol) { - int err; - struct ubi_volume *vol = ubi->volumes[vol_id]; + int err, vol_id = vol->vol_id; + dev_t dev; dbg_msg("add volume %d", vol_id); ubi_dbg_dump_vol_info(vol); - ubi_assert(vol); /* Register character device for the volume */ cdev_init(&vol->cdev, &ubi_vol_cdev_operations); vol->cdev.owner = THIS_MODULE; - err = cdev_add(&vol->cdev, MKDEV(ubi->major, vol->vol_id + 1), 1); + dev = MKDEV(MAJOR(ubi->cdev.dev), vol->vol_id + 1); + err = cdev_add(&vol->cdev, dev, 1); if (err) { - ubi_err("cannot add character device for volume %d", vol_id); + ubi_err("cannot add character device for volume %d, error %d", + vol_id, err); return err; } @@ -595,7 +633,7 @@ int ubi_add_volume(struct ubi_device *ubi, int vol_id) vol->dev.release = vol_release; vol->dev.parent = &ubi->dev; - vol->dev.devt = MKDEV(ubi->major, vol->vol_id + 1); + vol->dev.devt = dev; vol->dev.class = ubi_class; sprintf(&vol->dev.bus_id[0], "%s_%d", ubi->ubi_name, vol->vol_id); err = device_register(&vol->dev); @@ -623,22 +661,19 @@ out_cdev: /** * ubi_free_volume - free volume. * @ubi: UBI device description object - * @vol_id: volume ID + * @vol: volume description object * - * This function frees all resources for volume @vol_id but does not remove it. + * This function frees all resources for volume @vol but does not remove it. * Used only when the UBI device is detached. */ -void ubi_free_volume(struct ubi_device *ubi, int vol_id) +void ubi_free_volume(struct ubi_device *ubi, struct ubi_volume *vol) { int err; - struct ubi_volume *vol = ubi->volumes[vol_id]; - dbg_msg("free volume %d", vol_id); - ubi_assert(vol); + dbg_msg("free volume %d", vol->vol_id); - vol->removed = 1; + ubi->volumes[vol->vol_id] = NULL; err = ubi_destroy_gluebi(vol); - ubi->volumes[vol_id] = NULL; cdev_del(&vol->cdev); volume_sysfs_close(vol); } @@ -708,11 +743,6 @@ static void paranoid_check_volume(struct ubi_device *ubi, int vol_id) goto fail; } - if (vol->upd_marker != 0 && vol->upd_marker != 1) { - ubi_err("bad upd_marker"); - goto fail; - } - if (vol->upd_marker && vol->corrupted) { dbg_err("update marker and corrupted simultaneously"); goto fail; @@ -747,7 +777,7 @@ static void paranoid_check_volume(struct ubi_device *ubi, int vol_id) n = (long long)vol->used_ebs * vol->usable_leb_size; if (vol->vol_type == UBI_DYNAMIC_VOLUME) { - if (vol->corrupted != 0) { + if (vol->corrupted) { ubi_err("corrupted dynamic volume"); goto fail; } @@ -764,10 +794,6 @@ static void paranoid_check_volume(struct ubi_device *ubi, int vol_id) goto fail; } } else { - if (vol->corrupted != 0 && vol->corrupted != 1) { - ubi_err("bad corrupted"); - goto fail; - } if (vol->used_ebs < 0 || vol->used_ebs > vol->reserved_pebs) { ubi_err("bad used_ebs"); goto fail; @@ -820,9 +846,7 @@ static void paranoid_check_volumes(struct ubi_device *ubi) { int i; - mutex_lock(&ubi->vtbl_mutex); for (i = 0; i < ubi->vtbl_slots; i++) paranoid_check_volume(ubi, i); - mutex_unlock(&ubi->vtbl_mutex); } #endif diff --git a/drivers/mtd/ubi/vtbl.c b/drivers/mtd/ubi/vtbl.c index 25b3bd61c7ec..56fc3fbce838 100644 --- a/drivers/mtd/ubi/vtbl.c +++ b/drivers/mtd/ubi/vtbl.c @@ -86,8 +86,10 @@ int ubi_change_vtbl_record(struct ubi_device *ubi, int idx, { int i, err; uint32_t crc; + struct ubi_volume *layout_vol; ubi_assert(idx >= 0 && idx < ubi->vtbl_slots); + layout_vol = ubi->volumes[vol_id2idx(ubi, UBI_LAYOUT_VOLUME_ID)]; if (!vtbl_rec) vtbl_rec = &empty_vtbl_record; @@ -96,31 +98,25 @@ int ubi_change_vtbl_record(struct ubi_device *ubi, int idx, vtbl_rec->crc = cpu_to_be32(crc); } - mutex_lock(&ubi->vtbl_mutex); memcpy(&ubi->vtbl[idx], vtbl_rec, sizeof(struct ubi_vtbl_record)); for (i = 0; i < UBI_LAYOUT_VOLUME_EBS; i++) { - err = ubi_eba_unmap_leb(ubi, UBI_LAYOUT_VOL_ID, i); - if (err) { - mutex_unlock(&ubi->vtbl_mutex); + err = ubi_eba_unmap_leb(ubi, layout_vol, i); + if (err) return err; - } - err = ubi_eba_write_leb(ubi, UBI_LAYOUT_VOL_ID, i, ubi->vtbl, 0, + + err = ubi_eba_write_leb(ubi, layout_vol, i, ubi->vtbl, 0, ubi->vtbl_size, UBI_LONGTERM); - if (err) { - mutex_unlock(&ubi->vtbl_mutex); + if (err) return err; - } } paranoid_vtbl_check(ubi); - mutex_unlock(&ubi->vtbl_mutex); - return ubi_wl_flush(ubi); + return 0; } /** - * vol_til_check - check if volume table is not corrupted and contains sensible - * data. - * + * vtbl_check - check if volume table is not corrupted and contains sensible + * data. * @ubi: UBI device description object * @vtbl: volume table * @@ -273,7 +269,7 @@ static int create_vtbl(struct ubi_device *ubi, struct ubi_scan_info *si, * this volume table copy was found during scanning. It has to be wiped * out. */ - sv = ubi_scan_find_sv(si, UBI_LAYOUT_VOL_ID); + sv = ubi_scan_find_sv(si, UBI_LAYOUT_VOLUME_ID); if (sv) old_seb = ubi_scan_find_seb(sv, copy); @@ -285,7 +281,7 @@ retry: } vid_hdr->vol_type = UBI_VID_DYNAMIC; - vid_hdr->vol_id = cpu_to_be32(UBI_LAYOUT_VOL_ID); + vid_hdr->vol_id = cpu_to_be32(UBI_LAYOUT_VOLUME_ID); vid_hdr->compat = UBI_LAYOUT_VOLUME_COMPAT; vid_hdr->data_size = vid_hdr->used_ebs = vid_hdr->data_pad = cpu_to_be32(0); @@ -518,6 +514,17 @@ static int init_volumes(struct ubi_device *ubi, const struct ubi_scan_info *si, vol->name[vol->name_len] = '\0'; vol->vol_id = i; + if (vtbl[i].flags & UBI_VTBL_AUTORESIZE_FLG) { + /* Auto re-size flag may be set only for one volume */ + if (ubi->autoresize_vol_id != -1) { + ubi_err("more then one auto-resize volume (%d " + "and %d)", ubi->autoresize_vol_id, i); + return -EINVAL; + } + + ubi->autoresize_vol_id = i; + } + ubi_assert(!ubi->volumes[i]); ubi->volumes[i] = vol; ubi->vol_count += 1; @@ -568,6 +575,7 @@ static int init_volumes(struct ubi_device *ubi, const struct ubi_scan_info *si, vol->last_eb_bytes = sv->last_data_size; } + /* And add the layout volume */ vol = kzalloc(sizeof(struct ubi_volume), GFP_KERNEL); if (!vol) return -ENOMEM; @@ -582,7 +590,8 @@ static int init_volumes(struct ubi_device *ubi, const struct ubi_scan_info *si, vol->last_eb_bytes = vol->reserved_pebs; vol->used_bytes = (long long)vol->used_ebs * (ubi->leb_size - vol->data_pad); - vol->vol_id = UBI_LAYOUT_VOL_ID; + vol->vol_id = UBI_LAYOUT_VOLUME_ID; + vol->ref_count = 1; ubi_assert(!ubi->volumes[i]); ubi->volumes[vol_id2idx(ubi, vol->vol_id)] = vol; @@ -734,7 +743,7 @@ int ubi_read_volume_table(struct ubi_device *ubi, struct ubi_scan_info *si) ubi->vtbl_size = ubi->vtbl_slots * UBI_VTBL_RECORD_SIZE; ubi->vtbl_size = ALIGN(ubi->vtbl_size, ubi->min_io_size); - sv = ubi_scan_find_sv(si, UBI_LAYOUT_VOL_ID); + sv = ubi_scan_find_sv(si, UBI_LAYOUT_VOLUME_ID); if (!sv) { /* * No logical eraseblocks belonging to the layout volume were diff --git a/drivers/mtd/ubi/wl.c b/drivers/mtd/ubi/wl.c index 6330c8cc72b5..a471a491f0ab 100644 --- a/drivers/mtd/ubi/wl.c +++ b/drivers/mtd/ubi/wl.c @@ -117,21 +117,6 @@ #define WL_MAX_FAILURES 32 /** - * struct ubi_wl_entry - wear-leveling entry. - * @rb: link in the corresponding RB-tree - * @ec: erase counter - * @pnum: physical eraseblock number - * - * Each physical eraseblock has a corresponding &struct wl_entry object which - * may be kept in different RB-trees. - */ -struct ubi_wl_entry { - struct rb_node rb; - int ec; - int pnum; -}; - -/** * struct ubi_wl_prot_entry - PEB protection entry. * @rb_pnum: link in the @wl->prot.pnum RB-tree * @rb_aec: link in the @wl->prot.aec RB-tree @@ -216,9 +201,6 @@ static int paranoid_check_in_wl_tree(struct ubi_wl_entry *e, #define paranoid_check_in_wl_tree(e, root) #endif -/* Slab cache for wear-leveling entries */ -static struct kmem_cache *wl_entries_slab; - /** * wl_tree_add - add a wear-leveling entry to a WL RB-tree. * @e: the wear-leveling entry to add @@ -267,15 +249,26 @@ static int do_work(struct ubi_device *ubi) int err; struct ubi_work *wrk; - spin_lock(&ubi->wl_lock); + cond_resched(); + /* + * @ubi->work_sem is used to synchronize with the workers. Workers take + * it in read mode, so many of them may be doing works at a time. But + * the queue flush code has to be sure the whole queue of works is + * done, and it takes the mutex in write mode. + */ + down_read(&ubi->work_sem); + spin_lock(&ubi->wl_lock); if (list_empty(&ubi->works)) { spin_unlock(&ubi->wl_lock); + up_read(&ubi->work_sem); return 0; } wrk = list_entry(ubi->works.next, struct ubi_work, list); list_del(&wrk->list); + ubi->works_count -= 1; + ubi_assert(ubi->works_count >= 0); spin_unlock(&ubi->wl_lock); /* @@ -286,11 +279,8 @@ static int do_work(struct ubi_device *ubi) err = wrk->func(ubi, wrk, 0); if (err) ubi_err("work failed with error code %d", err); + up_read(&ubi->work_sem); - spin_lock(&ubi->wl_lock); - ubi->works_count -= 1; - ubi_assert(ubi->works_count >= 0); - spin_unlock(&ubi->wl_lock); return err; } @@ -549,8 +539,12 @@ retry: * prot_tree_del - remove a physical eraseblock from the protection trees * @ubi: UBI device description object * @pnum: the physical eraseblock to remove + * + * This function returns PEB @pnum from the protection trees and returns zero + * in case of success and %-ENODEV if the PEB was not found in the protection + * trees. */ -static void prot_tree_del(struct ubi_device *ubi, int pnum) +static int prot_tree_del(struct ubi_device *ubi, int pnum) { struct rb_node *p; struct ubi_wl_prot_entry *pe = NULL; @@ -561,7 +555,7 @@ static void prot_tree_del(struct ubi_device *ubi, int pnum) pe = rb_entry(p, struct ubi_wl_prot_entry, rb_pnum); if (pnum == pe->e->pnum) - break; + goto found; if (pnum < pe->e->pnum) p = p->rb_left; @@ -569,10 +563,14 @@ static void prot_tree_del(struct ubi_device *ubi, int pnum) p = p->rb_right; } + return -ENODEV; + +found: ubi_assert(pe->e->pnum == pnum); rb_erase(&pe->rb_aec, &ubi->prot.aec); rb_erase(&pe->rb_pnum, &ubi->prot.pnum); kfree(pe); + return 0; } /** @@ -744,7 +742,8 @@ static int schedule_erase(struct ubi_device *ubi, struct ubi_wl_entry *e, static int wear_leveling_worker(struct ubi_device *ubi, struct ubi_work *wrk, int cancel) { - int err, put = 0; + int err, put = 0, scrubbing = 0, protect = 0; + struct ubi_wl_prot_entry *uninitialized_var(pe); struct ubi_wl_entry *e1, *e2; struct ubi_vid_hdr *vid_hdr; @@ -757,21 +756,17 @@ static int wear_leveling_worker(struct ubi_device *ubi, struct ubi_work *wrk, if (!vid_hdr) return -ENOMEM; + mutex_lock(&ubi->move_mutex); spin_lock(&ubi->wl_lock); + ubi_assert(!ubi->move_from && !ubi->move_to); + ubi_assert(!ubi->move_to_put); - /* - * Only one WL worker at a time is supported at this implementation, so - * make sure a PEB is not being moved already. - */ - if (ubi->move_to || !ubi->free.rb_node || + if (!ubi->free.rb_node || (!ubi->used.rb_node && !ubi->scrub.rb_node)) { /* - * Only one WL worker at a time is supported at this - * implementation, so if a LEB is already being moved, cancel. - * - * No free physical eraseblocks? Well, we cancel wear-leveling - * then. It will be triggered again when a free physical - * eraseblock appears. + * No free physical eraseblocks? Well, they must be waiting in + * the queue to be erased. Cancel movement - it will be + * triggered again when a free physical eraseblock appears. * * No used physical eraseblocks? They must be temporarily * protected from being moved. They will be moved to the @@ -780,10 +775,7 @@ static int wear_leveling_worker(struct ubi_device *ubi, struct ubi_work *wrk, */ dbg_wl("cancel WL, a list is empty: free %d, used %d", !ubi->free.rb_node, !ubi->used.rb_node); - ubi->wl_scheduled = 0; - spin_unlock(&ubi->wl_lock); - ubi_free_vid_hdr(ubi, vid_hdr); - return 0; + goto out_cancel; } if (!ubi->scrub.rb_node) { @@ -798,27 +790,24 @@ static int wear_leveling_worker(struct ubi_device *ubi, struct ubi_work *wrk, if (!(e2->ec - e1->ec >= UBI_WL_THRESHOLD)) { dbg_wl("no WL needed: min used EC %d, max free EC %d", e1->ec, e2->ec); - ubi->wl_scheduled = 0; - spin_unlock(&ubi->wl_lock); - ubi_free_vid_hdr(ubi, vid_hdr); - return 0; + goto out_cancel; } paranoid_check_in_wl_tree(e1, &ubi->used); rb_erase(&e1->rb, &ubi->used); dbg_wl("move PEB %d EC %d to PEB %d EC %d", e1->pnum, e1->ec, e2->pnum, e2->ec); } else { + /* Perform scrubbing */ + scrubbing = 1; e1 = rb_entry(rb_first(&ubi->scrub), struct ubi_wl_entry, rb); e2 = find_wl_entry(&ubi->free, WL_FREE_MAX_DIFF); paranoid_check_in_wl_tree(e1, &ubi->scrub); - rb_erase(&e1->rb, &ubi->scrub); + rb_erase(&e1->rb, &ubi->scrub); dbg_wl("scrub PEB %d to PEB %d", e1->pnum, e2->pnum); } paranoid_check_in_wl_tree(e2, &ubi->free); rb_erase(&e2->rb, &ubi->free); - ubi_assert(!ubi->move_from && !ubi->move_to); - ubi_assert(!ubi->move_to_put && !ubi->move_from_put); ubi->move_from = e1; ubi->move_to = e2; spin_unlock(&ubi->wl_lock); @@ -828,6 +817,10 @@ static int wear_leveling_worker(struct ubi_device *ubi, struct ubi_work *wrk, * We so far do not know which logical eraseblock our physical * eraseblock (@e1) belongs to. We have to read the volume identifier * header first. + * + * Note, we are protected from this PEB being unmapped and erased. The + * 'ubi_wl_put_peb()' would wait for moving to be finished if the PEB + * which is being moved was unmapped. */ err = ubi_io_read_vid_hdr(ubi, e1->pnum, vid_hdr, 0); @@ -842,32 +835,51 @@ static int wear_leveling_worker(struct ubi_device *ubi, struct ubi_work *wrk, * likely have the VID header in place. */ dbg_wl("PEB %d has no VID header", e1->pnum); - err = 0; - } else { - ubi_err("error %d while reading VID header from PEB %d", - err, e1->pnum); - if (err > 0) - err = -EIO; + goto out_not_moved; } - goto error; + + ubi_err("error %d while reading VID header from PEB %d", + err, e1->pnum); + if (err > 0) + err = -EIO; + goto out_error; } err = ubi_eba_copy_leb(ubi, e1->pnum, e2->pnum, vid_hdr); if (err) { - if (err == UBI_IO_BITFLIPS) - err = 0; - goto error; + + if (err < 0) + goto out_error; + if (err == 1) + goto out_not_moved; + + /* + * For some reason the LEB was not moved - it might be because + * the volume is being deleted. We should prevent this PEB from + * being selected for wear-levelling movement for some "time", + * so put it to the protection tree. + */ + + dbg_wl("cancelled moving PEB %d", e1->pnum); + pe = kmalloc(sizeof(struct ubi_wl_prot_entry), GFP_NOFS); + if (!pe) { + err = -ENOMEM; + goto out_error; + } + + protect = 1; } ubi_free_vid_hdr(ubi, vid_hdr); spin_lock(&ubi->wl_lock); + if (protect) + prot_tree_add(ubi, e1, pe, protect); if (!ubi->move_to_put) wl_tree_add(e2, &ubi->used); else put = 1; ubi->move_from = ubi->move_to = NULL; - ubi->move_from_put = ubi->move_to_put = 0; - ubi->wl_scheduled = 0; + ubi->move_to_put = ubi->wl_scheduled = 0; spin_unlock(&ubi->wl_lock); if (put) { @@ -877,62 +889,67 @@ static int wear_leveling_worker(struct ubi_device *ubi, struct ubi_work *wrk, */ dbg_wl("PEB %d was put meanwhile, erase", e2->pnum); err = schedule_erase(ubi, e2, 0); - if (err) { - kmem_cache_free(wl_entries_slab, e2); - ubi_ro_mode(ubi); - } + if (err) + goto out_error; } - err = schedule_erase(ubi, e1, 0); - if (err) { - kmem_cache_free(wl_entries_slab, e1); - ubi_ro_mode(ubi); + if (!protect) { + err = schedule_erase(ubi, e1, 0); + if (err) + goto out_error; } + dbg_wl("done"); - return err; + mutex_unlock(&ubi->move_mutex); + return 0; /* - * Some error occurred. @e1 was not changed, so return it back. @e2 - * might be changed, schedule it for erasure. + * For some reasons the LEB was not moved, might be an error, might be + * something else. @e1 was not changed, so return it back. @e2 might + * be changed, schedule it for erasure. */ -error: - if (err) - dbg_wl("error %d occurred, cancel operation", err); - ubi_assert(err <= 0); - +out_not_moved: ubi_free_vid_hdr(ubi, vid_hdr); spin_lock(&ubi->wl_lock); - ubi->wl_scheduled = 0; - if (ubi->move_from_put) - put = 1; + if (scrubbing) + wl_tree_add(e1, &ubi->scrub); else wl_tree_add(e1, &ubi->used); ubi->move_from = ubi->move_to = NULL; - ubi->move_from_put = ubi->move_to_put = 0; + ubi->move_to_put = ubi->wl_scheduled = 0; spin_unlock(&ubi->wl_lock); - if (put) { - /* - * Well, the target PEB was put meanwhile, schedule it for - * erasure. - */ - dbg_wl("PEB %d was put meanwhile, erase", e1->pnum); - err = schedule_erase(ubi, e1, 0); - if (err) { - kmem_cache_free(wl_entries_slab, e1); - ubi_ro_mode(ubi); - } - } - err = schedule_erase(ubi, e2, 0); - if (err) { - kmem_cache_free(wl_entries_slab, e2); - ubi_ro_mode(ubi); - } + if (err) + goto out_error; + + mutex_unlock(&ubi->move_mutex); + return 0; + +out_error: + ubi_err("error %d while moving PEB %d to PEB %d", + err, e1->pnum, e2->pnum); - yield(); + ubi_free_vid_hdr(ubi, vid_hdr); + spin_lock(&ubi->wl_lock); + ubi->move_from = ubi->move_to = NULL; + ubi->move_to_put = ubi->wl_scheduled = 0; + spin_unlock(&ubi->wl_lock); + + kmem_cache_free(ubi_wl_entry_slab, e1); + kmem_cache_free(ubi_wl_entry_slab, e2); + ubi_ro_mode(ubi); + + mutex_unlock(&ubi->move_mutex); return err; + +out_cancel: + ubi->wl_scheduled = 0; + spin_unlock(&ubi->wl_lock); + mutex_unlock(&ubi->move_mutex); + ubi_free_vid_hdr(ubi, vid_hdr); + return 0; } /** @@ -1020,7 +1037,7 @@ static int erase_worker(struct ubi_device *ubi, struct ubi_work *wl_wrk, if (cancel) { dbg_wl("cancel erasure of PEB %d EC %d", pnum, e->ec); kfree(wl_wrk); - kmem_cache_free(wl_entries_slab, e); + kmem_cache_free(ubi_wl_entry_slab, e); return 0; } @@ -1049,7 +1066,7 @@ static int erase_worker(struct ubi_device *ubi, struct ubi_work *wl_wrk, ubi_err("failed to erase PEB %d, error %d", pnum, err); kfree(wl_wrk); - kmem_cache_free(wl_entries_slab, e); + kmem_cache_free(ubi_wl_entry_slab, e); if (err == -EINTR || err == -ENOMEM || err == -EAGAIN || err == -EBUSY) { @@ -1119,8 +1136,7 @@ out_ro: } /** - * ubi_wl_put_peb - return a physical eraseblock to the wear-leveling - * unit. + * ubi_wl_put_peb - return a physical eraseblock to the wear-leveling unit. * @ubi: UBI device description object * @pnum: physical eraseblock to return * @torture: if this physical eraseblock has to be tortured @@ -1128,7 +1144,7 @@ out_ro: * This function is called to return physical eraseblock @pnum to the pool of * free physical eraseblocks. The @torture flag has to be set if an I/O error * occurred to this @pnum and it has to be tested. This function returns zero - * in case of success and a negative error code in case of failure. + * in case of success, and a negative error code in case of failure. */ int ubi_wl_put_peb(struct ubi_device *ubi, int pnum, int torture) { @@ -1139,8 +1155,8 @@ int ubi_wl_put_peb(struct ubi_device *ubi, int pnum, int torture) ubi_assert(pnum >= 0); ubi_assert(pnum < ubi->peb_count); +retry: spin_lock(&ubi->wl_lock); - e = ubi->lookuptbl[pnum]; if (e == ubi->move_from) { /* @@ -1148,17 +1164,22 @@ int ubi_wl_put_peb(struct ubi_device *ubi, int pnum, int torture) * be moved. It will be scheduled for erasure in the * wear-leveling worker. */ - dbg_wl("PEB %d is being moved", pnum); - ubi_assert(!ubi->move_from_put); - ubi->move_from_put = 1; + dbg_wl("PEB %d is being moved, wait", pnum); spin_unlock(&ubi->wl_lock); - return 0; + + /* Wait for the WL worker by taking the @ubi->move_mutex */ + mutex_lock(&ubi->move_mutex); + mutex_unlock(&ubi->move_mutex); + goto retry; } else if (e == ubi->move_to) { /* * User is putting the physical eraseblock which was selected * as the target the data is moved to. It may happen if the EBA - * unit already re-mapped the LEB but the WL unit did has not - * put the PEB to the "used" tree. + * unit already re-mapped the LEB in 'ubi_eba_copy_leb()' but + * the WL unit has not put the PEB to the "used" tree yet, but + * it is about to do this. So we just set a flag which will + * tell the WL worker that the PEB is not needed anymore and + * should be scheduled for erasure. */ dbg_wl("PEB %d is the target of data moving", pnum); ubi_assert(!ubi->move_to_put); @@ -1172,8 +1193,15 @@ int ubi_wl_put_peb(struct ubi_device *ubi, int pnum, int torture) } else if (in_wl_tree(e, &ubi->scrub)) { paranoid_check_in_wl_tree(e, &ubi->scrub); rb_erase(&e->rb, &ubi->scrub); - } else - prot_tree_del(ubi, e->pnum); + } else { + err = prot_tree_del(ubi, e->pnum); + if (err) { + ubi_err("PEB %d not found", pnum); + ubi_ro_mode(ubi); + spin_unlock(&ubi->wl_lock); + return err; + } + } } spin_unlock(&ubi->wl_lock); @@ -1227,8 +1255,17 @@ retry: if (in_wl_tree(e, &ubi->used)) { paranoid_check_in_wl_tree(e, &ubi->used); rb_erase(&e->rb, &ubi->used); - } else - prot_tree_del(ubi, pnum); + } else { + int err; + + err = prot_tree_del(ubi, e->pnum); + if (err) { + ubi_err("PEB %d not found", pnum); + ubi_ro_mode(ubi); + spin_unlock(&ubi->wl_lock); + return err; + } + } wl_tree_add(e, &ubi->scrub); spin_unlock(&ubi->wl_lock); @@ -1249,17 +1286,32 @@ retry: */ int ubi_wl_flush(struct ubi_device *ubi) { - int err, pending_count; - - pending_count = ubi->works_count; - - dbg_wl("flush (%d pending works)", pending_count); + int err; /* * Erase while the pending works queue is not empty, but not more then * the number of currently pending works. */ - while (pending_count-- > 0) { + dbg_wl("flush (%d pending works)", ubi->works_count); + while (ubi->works_count) { + err = do_work(ubi); + if (err) + return err; + } + + /* + * Make sure all the works which have been done in parallel are + * finished. + */ + down_write(&ubi->work_sem); + up_write(&ubi->work_sem); + + /* + * And in case last was the WL worker and it cancelled the LEB + * movement, flush again. + */ + while (ubi->works_count) { + dbg_wl("flush more (%d pending works)", ubi->works_count); err = do_work(ubi); if (err) return err; @@ -1294,7 +1346,7 @@ static void tree_destroy(struct rb_root *root) rb->rb_right = NULL; } - kmem_cache_free(wl_entries_slab, e); + kmem_cache_free(ubi_wl_entry_slab, e); } } } @@ -1303,7 +1355,7 @@ static void tree_destroy(struct rb_root *root) * ubi_thread - UBI background thread. * @u: the UBI device description object pointer */ -static int ubi_thread(void *u) +int ubi_thread(void *u) { int failures = 0; struct ubi_device *ubi = u; @@ -1394,36 +1446,22 @@ int ubi_wl_init_scan(struct ubi_device *ubi, struct ubi_scan_info *si) ubi->used = ubi->free = ubi->scrub = RB_ROOT; ubi->prot.pnum = ubi->prot.aec = RB_ROOT; spin_lock_init(&ubi->wl_lock); + mutex_init(&ubi->move_mutex); + init_rwsem(&ubi->work_sem); ubi->max_ec = si->max_ec; INIT_LIST_HEAD(&ubi->works); sprintf(ubi->bgt_name, UBI_BGT_NAME_PATTERN, ubi->ubi_num); - ubi->bgt_thread = kthread_create(ubi_thread, ubi, ubi->bgt_name); - if (IS_ERR(ubi->bgt_thread)) { - err = PTR_ERR(ubi->bgt_thread); - ubi_err("cannot spawn \"%s\", error %d", ubi->bgt_name, - err); - return err; - } - - if (ubi_devices_cnt == 0) { - wl_entries_slab = kmem_cache_create("ubi_wl_entry_slab", - sizeof(struct ubi_wl_entry), - 0, 0, NULL); - if (!wl_entries_slab) - return -ENOMEM; - } - err = -ENOMEM; ubi->lookuptbl = kzalloc(ubi->peb_count * sizeof(void *), GFP_KERNEL); if (!ubi->lookuptbl) - goto out_free; + return err; list_for_each_entry_safe(seb, tmp, &si->erase, u.list) { cond_resched(); - e = kmem_cache_alloc(wl_entries_slab, GFP_KERNEL); + e = kmem_cache_alloc(ubi_wl_entry_slab, GFP_KERNEL); if (!e) goto out_free; @@ -1431,7 +1469,7 @@ int ubi_wl_init_scan(struct ubi_device *ubi, struct ubi_scan_info *si) e->ec = seb->ec; ubi->lookuptbl[e->pnum] = e; if (schedule_erase(ubi, e, 0)) { - kmem_cache_free(wl_entries_slab, e); + kmem_cache_free(ubi_wl_entry_slab, e); goto out_free; } } @@ -1439,7 +1477,7 @@ int ubi_wl_init_scan(struct ubi_device *ubi, struct ubi_scan_info *si) list_for_each_entry(seb, &si->free, u.list) { cond_resched(); - e = kmem_cache_alloc(wl_entries_slab, GFP_KERNEL); + e = kmem_cache_alloc(ubi_wl_entry_slab, GFP_KERNEL); if (!e) goto out_free; @@ -1453,7 +1491,7 @@ int ubi_wl_init_scan(struct ubi_device *ubi, struct ubi_scan_info *si) list_for_each_entry(seb, &si->corr, u.list) { cond_resched(); - e = kmem_cache_alloc(wl_entries_slab, GFP_KERNEL); + e = kmem_cache_alloc(ubi_wl_entry_slab, GFP_KERNEL); if (!e) goto out_free; @@ -1461,7 +1499,7 @@ int ubi_wl_init_scan(struct ubi_device *ubi, struct ubi_scan_info *si) e->ec = seb->ec; ubi->lookuptbl[e->pnum] = e; if (schedule_erase(ubi, e, 0)) { - kmem_cache_free(wl_entries_slab, e); + kmem_cache_free(ubi_wl_entry_slab, e); goto out_free; } } @@ -1470,7 +1508,7 @@ int ubi_wl_init_scan(struct ubi_device *ubi, struct ubi_scan_info *si) ubi_rb_for_each_entry(rb2, seb, &sv->root, u.rb) { cond_resched(); - e = kmem_cache_alloc(wl_entries_slab, GFP_KERNEL); + e = kmem_cache_alloc(ubi_wl_entry_slab, GFP_KERNEL); if (!e) goto out_free; @@ -1510,8 +1548,6 @@ out_free: tree_destroy(&ubi->free); tree_destroy(&ubi->scrub); kfree(ubi->lookuptbl); - if (ubi_devices_cnt == 0) - kmem_cache_destroy(wl_entries_slab); return err; } @@ -1541,7 +1577,7 @@ static void protection_trees_destroy(struct ubi_device *ubi) rb->rb_right = NULL; } - kmem_cache_free(wl_entries_slab, pe->e); + kmem_cache_free(ubi_wl_entry_slab, pe->e); kfree(pe); } } @@ -1553,10 +1589,6 @@ static void protection_trees_destroy(struct ubi_device *ubi) */ void ubi_wl_close(struct ubi_device *ubi) { - dbg_wl("disable \"%s\"", ubi->bgt_name); - if (ubi->bgt_thread) - kthread_stop(ubi->bgt_thread); - dbg_wl("close the UBI wear-leveling unit"); cancel_pending(ubi); @@ -1565,8 +1597,6 @@ void ubi_wl_close(struct ubi_device *ubi) tree_destroy(&ubi->free); tree_destroy(&ubi->scrub); kfree(ubi->lookuptbl); - if (ubi_devices_cnt == 1) - kmem_cache_destroy(wl_entries_slab); } #ifdef CONFIG_MTD_UBI_DEBUG_PARANOID diff --git a/fs/jffs2/acl.c b/fs/jffs2/acl.c index 77fc5838609c..4c80404a9aba 100644 --- a/fs/jffs2/acl.c +++ b/fs/jffs2/acl.c @@ -176,7 +176,7 @@ static void jffs2_iset_acl(struct inode *inode, struct posix_acl **i_acl, struct spin_unlock(&inode->i_lock); } -struct posix_acl *jffs2_get_acl(struct inode *inode, int type) +static struct posix_acl *jffs2_get_acl(struct inode *inode, int type) { struct jffs2_inode_info *f = JFFS2_INODE_INFO(inode); struct posix_acl *acl; @@ -345,8 +345,10 @@ int jffs2_init_acl_pre(struct inode *dir_i, struct inode *inode, int *i_mode) if (!clone) return -ENOMEM; rc = posix_acl_create_masq(clone, (mode_t *)i_mode); - if (rc < 0) + if (rc < 0) { + posix_acl_release(clone); return rc; + } if (rc > 0) jffs2_iset_acl(inode, &f->i_acl_access, clone); diff --git a/fs/jffs2/acl.h b/fs/jffs2/acl.h index 76c6ebd1acd9..0bb7f003fd80 100644 --- a/fs/jffs2/acl.h +++ b/fs/jffs2/acl.h @@ -28,7 +28,6 @@ struct jffs2_acl_header { #define JFFS2_ACL_NOT_CACHED ((void *)-1) -extern struct posix_acl *jffs2_get_acl(struct inode *inode, int type); extern int jffs2_permission(struct inode *, int, struct nameidata *); extern int jffs2_acl_chmod(struct inode *); extern int jffs2_init_acl_pre(struct inode *, struct inode *, int *); @@ -40,7 +39,6 @@ extern struct xattr_handler jffs2_acl_default_xattr_handler; #else -#define jffs2_get_acl(inode, type) (NULL) #define jffs2_permission (NULL) #define jffs2_acl_chmod(inode) (0) #define jffs2_init_acl_pre(dir_i,inode,mode) (0) diff --git a/fs/jffs2/fs.c b/fs/jffs2/fs.c index 6d1eaddde0ec..e26ea78c7892 100644 --- a/fs/jffs2/fs.c +++ b/fs/jffs2/fs.c @@ -97,11 +97,7 @@ int jffs2_do_setattr (struct inode *inode, struct iattr *iattr) ri->gid = cpu_to_je16((ivalid & ATTR_GID)?iattr->ia_gid:inode->i_gid); if (ivalid & ATTR_MODE) - if (iattr->ia_mode & S_ISGID && - !in_group_p(je16_to_cpu(ri->gid)) && !capable(CAP_FSETID)) - ri->mode = cpu_to_jemode(iattr->ia_mode & ~S_ISGID); - else - ri->mode = cpu_to_jemode(iattr->ia_mode); + ri->mode = cpu_to_jemode(iattr->ia_mode); else ri->mode = cpu_to_jemode(inode->i_mode); diff --git a/fs/jffs2/nodelist.c b/fs/jffs2/nodelist.c index 4bf86088b3ae..87c6f555e1a0 100644 --- a/fs/jffs2/nodelist.c +++ b/fs/jffs2/nodelist.c @@ -32,15 +32,18 @@ void jffs2_add_fd_to_list(struct jffs2_sb_info *c, struct jffs2_full_dirent *new if ((*prev)->nhash == new->nhash && !strcmp((*prev)->name, new->name)) { /* Duplicate. Free one */ if (new->version < (*prev)->version) { - dbg_dentlist("Eep! Marking new dirent node is obsolete, old is \"%s\", ino #%u\n", + dbg_dentlist("Eep! Marking new dirent node obsolete, old is \"%s\", ino #%u\n", (*prev)->name, (*prev)->ino); jffs2_mark_node_obsolete(c, new->raw); jffs2_free_full_dirent(new); } else { - dbg_dentlist("marking old dirent \"%s\", ino #%u bsolete\n", + dbg_dentlist("marking old dirent \"%s\", ino #%u obsolete\n", (*prev)->name, (*prev)->ino); new->next = (*prev)->next; - jffs2_mark_node_obsolete(c, ((*prev)->raw)); + /* It may have been a 'placeholder' deletion dirent, + if jffs2_can_mark_obsolete() (see jffs2_do_unlink()) */ + if ((*prev)->raw) + jffs2_mark_node_obsolete(c, ((*prev)->raw)); jffs2_free_full_dirent(*prev); *prev = new; } diff --git a/fs/jffs2/readinode.c b/fs/jffs2/readinode.c index 6c1ba3566f58..e512a93d6249 100644 --- a/fs/jffs2/readinode.c +++ b/fs/jffs2/readinode.c @@ -37,23 +37,24 @@ static int check_node_data(struct jffs2_sb_info *c, struct jffs2_tmp_dnode_info BUG_ON(tn->csize == 0); - if (!jffs2_is_writebuffered(c)) - goto adj_acc; - /* Calculate how many bytes were already checked */ ofs = ref_offset(ref) + sizeof(struct jffs2_raw_inode); - len = ofs % c->wbuf_pagesize; - if (likely(len)) - len = c->wbuf_pagesize - len; - - if (len >= tn->csize) { - dbg_readinode("no need to check node at %#08x, data length %u, data starts at %#08x - it has already been checked.\n", - ref_offset(ref), tn->csize, ofs); - goto adj_acc; - } + len = tn->csize; + + if (jffs2_is_writebuffered(c)) { + int adj = ofs % c->wbuf_pagesize; + if (likely(adj)) + adj = c->wbuf_pagesize - adj; + + if (adj >= tn->csize) { + dbg_readinode("no need to check node at %#08x, data length %u, data starts at %#08x - it has already been checked.\n", + ref_offset(ref), tn->csize, ofs); + goto adj_acc; + } - ofs += len; - len = tn->csize - len; + ofs += adj; + len -= adj; + } dbg_readinode("check node at %#08x, data length %u, partial CRC %#08x, correct CRC %#08x, data starts at %#08x, start checking from %#08x - %u bytes.\n", ref_offset(ref), tn->csize, tn->partial_crc, tn->data_crc, ofs - len, ofs, len); @@ -63,7 +64,7 @@ static int check_node_data(struct jffs2_sb_info *c, struct jffs2_tmp_dnode_info * adding and jffs2_flash_read_end() interface. */ if (c->mtd->point) { err = c->mtd->point(c->mtd, ofs, len, &retlen, &buffer); - if (!err && retlen < tn->csize) { + if (!err && retlen < len) { JFFS2_WARNING("MTD point returned len too short: %zu instead of %u.\n", retlen, tn->csize); c->mtd->unpoint(c->mtd, buffer, ofs, retlen); } else if (err) diff --git a/fs/jffs2/write.c b/fs/jffs2/write.c index 1b88e6e734ef..776f13cbf2b5 100644 --- a/fs/jffs2/write.c +++ b/fs/jffs2/write.c @@ -582,7 +582,7 @@ int jffs2_do_unlink(struct jffs2_sb_info *c, struct jffs2_inode_info *dir_f, jffs2_add_fd_to_list(c, fd, &dir_f->dents); up(&dir_f->sem); } else { - struct jffs2_full_dirent **prev = &dir_f->dents; + struct jffs2_full_dirent *fd = dir_f->dents; uint32_t nhash = full_name_hash(name, namelen); /* We don't actually want to reserve any space, but we do @@ -590,21 +590,22 @@ int jffs2_do_unlink(struct jffs2_sb_info *c, struct jffs2_inode_info *dir_f, down(&c->alloc_sem); down(&dir_f->sem); - while ((*prev) && (*prev)->nhash <= nhash) { - if ((*prev)->nhash == nhash && - !memcmp((*prev)->name, name, namelen) && - !(*prev)->name[namelen]) { - struct jffs2_full_dirent *this = *prev; + for (fd = dir_f->dents; fd; fd = fd->next) { + if (fd->nhash == nhash && + !memcmp(fd->name, name, namelen) && + !fd->name[namelen]) { D1(printk(KERN_DEBUG "Marking old dirent node (ino #%u) @%08x obsolete\n", - this->ino, ref_offset(this->raw))); - - *prev = this->next; - jffs2_mark_node_obsolete(c, (this->raw)); - jffs2_free_full_dirent(this); + fd->ino, ref_offset(fd->raw))); + jffs2_mark_node_obsolete(c, fd->raw); + /* We don't want to remove it from the list immediately, + because that screws up getdents()/seek() semantics even + more than they're screwed already. Turn it into a + node-less deletion dirent instead -- a placeholder */ + fd->raw = NULL; + fd->ino = 0; break; } - prev = &((*prev)->next); } up(&dir_f->sem); } @@ -630,7 +631,8 @@ int jffs2_do_unlink(struct jffs2_sb_info *c, struct jffs2_inode_info *dir_f, D1(printk(KERN_DEBUG "Removing deletion dirent for \"%s\" from dir ino #%u\n", fd->name, dead_f->inocache->ino)); } - jffs2_mark_node_obsolete(c, fd->raw); + if (fd->raw) + jffs2_mark_node_obsolete(c, fd->raw); jffs2_free_full_dirent(fd); } } diff --git a/include/linux/mtd/cfi.h b/include/linux/mtd/cfi.h index e17c5343cf51..b0ddf4b25862 100644 --- a/include/linux/mtd/cfi.h +++ b/include/linux/mtd/cfi.h @@ -98,6 +98,18 @@ static inline int cfi_interleave_supported(int i) #define CFI_DEVICETYPE_X32 (32 / 8) #define CFI_DEVICETYPE_X64 (64 / 8) + +/* Device Interface Code Assignments from the "Common Flash Memory Interface + * Publication 100" dated December 1, 2001. + */ +#define CFI_INTERFACE_X8_ASYNC 0x0000 +#define CFI_INTERFACE_X16_ASYNC 0x0001 +#define CFI_INTERFACE_X8_BY_X16_ASYNC 0x0002 +#define CFI_INTERFACE_X32_ASYNC 0x0003 +#define CFI_INTERFACE_X16_BY_X32_ASYNC 0x0005 +#define CFI_INTERFACE_NOT_ALLOWED 0xffff + + /* NB: We keep these structures in memory in HOST byteorder, except * where individually noted. */ diff --git a/include/linux/mtd/mtd.h b/include/linux/mtd/mtd.h index 783fc983417c..0a13bb35f044 100644 --- a/include/linux/mtd/mtd.h +++ b/include/linux/mtd/mtd.h @@ -152,6 +152,15 @@ struct mtd_info { int (*read) (struct mtd_info *mtd, loff_t from, size_t len, size_t *retlen, u_char *buf); int (*write) (struct mtd_info *mtd, loff_t to, size_t len, size_t *retlen, const u_char *buf); + /* In blackbox flight recorder like scenarios we want to make successful + writes in interrupt context. panic_write() is only intended to be + called when its known the kernel is about to panic and we need the + write to succeed. Since the kernel is not going to be running for much + longer, this function can break locks and delay to ensure the write + succeeds (but not sleep). */ + + int (*panic_write) (struct mtd_info *mtd, loff_t to, size_t len, size_t *retlen, const u_char *buf); + int (*read_oob) (struct mtd_info *mtd, loff_t from, struct mtd_oob_ops *ops); int (*write_oob) (struct mtd_info *mtd, loff_t to, diff --git a/include/linux/mtd/mtdram.h b/include/linux/mtd/mtdram.h new file mode 100644 index 000000000000..04fdc07b7353 --- /dev/null +++ b/include/linux/mtd/mtdram.h @@ -0,0 +1,8 @@ +#ifndef __MTD_MTDRAM_H__ +#define __MTD_MTDRAM_H__ + +#include <linux/mtd/mtd.h> +int mtdram_init_device(struct mtd_info *mtd, void *mapped_address, + unsigned long size, char *name); + +#endif /* __MTD_MTDRAM_H__ */ diff --git a/include/linux/mtd/onenand_regs.h b/include/linux/mtd/onenand_regs.h index c46161f4eee3..d1b310c92eb4 100644 --- a/include/linux/mtd/onenand_regs.h +++ b/include/linux/mtd/onenand_regs.h @@ -67,6 +67,7 @@ /* * Device ID Register F001h (R) */ +#define ONENAND_DEVICE_DENSITY_MASK (0xf) #define ONENAND_DEVICE_DENSITY_SHIFT (4) #define ONENAND_DEVICE_IS_DDP (1 << 3) #define ONENAND_DEVICE_IS_DEMUX (1 << 2) diff --git a/include/linux/mtd/partitions.h b/include/linux/mtd/partitions.h index da6b3d6f12a7..7c37d7e55abc 100644 --- a/include/linux/mtd/partitions.h +++ b/include/linux/mtd/partitions.h @@ -71,5 +71,12 @@ extern int parse_mtd_partitions(struct mtd_info *master, const char **types, #define put_partition_parser(p) do { module_put((p)->owner); } while(0) -#endif +struct device; +struct device_node; + +int __devinit of_mtd_parse_partitions(struct device *dev, + struct mtd_info *mtd, + struct device_node *node, + struct mtd_partition **pparts); +#endif diff --git a/include/linux/mtd/ubi.h b/include/linux/mtd/ubi.h index 3d967b6b120a..f71201d0f3e7 100644 --- a/include/linux/mtd/ubi.h +++ b/include/linux/mtd/ubi.h @@ -26,23 +26,6 @@ #include <mtd/ubi-user.h> /* - * UBI data type hint constants. - * - * UBI_LONGTERM: long-term data - * UBI_SHORTTERM: short-term data - * UBI_UNKNOWN: data persistence is unknown - * - * These constants are used when data is written to UBI volumes in order to - * help the UBI wear-leveling unit to find more appropriate physical - * eraseblocks. - */ -enum { - UBI_LONGTERM = 1, - UBI_SHORTTERM, - UBI_UNKNOWN -}; - -/* * enum ubi_open_mode - UBI volume open mode constants. * * UBI_READONLY: read-only mode @@ -167,6 +150,7 @@ int ubi_leb_change(struct ubi_volume_desc *desc, int lnum, const void *buf, int len, int dtype); int ubi_leb_erase(struct ubi_volume_desc *desc, int lnum); int ubi_leb_unmap(struct ubi_volume_desc *desc, int lnum); +int ubi_leb_map(struct ubi_volume_desc *desc, int lnum, int dtype); int ubi_is_mapped(struct ubi_volume_desc *desc, int lnum); /* diff --git a/include/mtd/mtd-abi.h b/include/mtd/mtd-abi.h index f71dac420394..615072c4da04 100644 --- a/include/mtd/mtd-abi.h +++ b/include/mtd/mtd-abi.h @@ -29,7 +29,7 @@ struct mtd_oob_buf { #define MTD_WRITEABLE 0x400 /* Device is writeable */ #define MTD_BIT_WRITEABLE 0x800 /* Single bits can be flipped */ #define MTD_NO_ERASE 0x1000 /* No erase necessary */ -#define MTD_STUPID_LOCK 0x2000 /* Always locked after reset */ +#define MTD_POWERUP_LOCK 0x2000 /* Always locked after reset */ // Some common devices / combinations of capabilities #define MTD_CAP_ROM 0 diff --git a/include/mtd/ubi-header.h b/include/mtd/ubi-header.h index 74efa7763479..292f916ea564 100644 --- a/include/mtd/ubi-header.h +++ b/include/mtd/ubi-header.h @@ -58,6 +58,43 @@ enum { }; /* + * Volume flags used in the volume table record. + * + * @UBI_VTBL_AUTORESIZE_FLG: auto-resize this volume + * + * %UBI_VTBL_AUTORESIZE_FLG flag can be set only for one volume in the volume + * table. UBI automatically re-sizes the volume which has this flag and makes + * the volume to be of largest possible size. This means that if after the + * initialization UBI finds out that there are available physical eraseblocks + * present on the device, it automatically appends all of them to the volume + * (the physical eraseblocks reserved for bad eraseblocks handling and other + * reserved physical eraseblocks are not taken). So, if there is a volume with + * the %UBI_VTBL_AUTORESIZE_FLG flag set, the amount of available logical + * eraseblocks will be zero after UBI is loaded, because all of them will be + * reserved for this volume. Note, the %UBI_VTBL_AUTORESIZE_FLG bit is cleared + * after the volume had been initialized. + * + * The auto-resize feature is useful for device production purposes. For + * example, different NAND flash chips may have different amount of initial bad + * eraseblocks, depending of particular chip instance. Manufacturers of NAND + * chips usually guarantee that the amount of initial bad eraseblocks does not + * exceed certain percent, e.g. 2%. When one creates an UBI image which will be + * flashed to the end devices in production, he does not know the exact amount + * of good physical eraseblocks the NAND chip on the device will have, but this + * number is required to calculate the volume sized and put them to the volume + * table of the UBI image. In this case, one of the volumes (e.g., the one + * which will store the root file system) is marked as "auto-resizable", and + * UBI will adjust its size on the first boot if needed. + * + * Note, first UBI reserves some amount of physical eraseblocks for bad + * eraseblock handling, and then re-sizes the volume, not vice-versa. This + * means that the pool of reserved physical eraseblocks will always be present. + */ +enum { + UBI_VTBL_AUTORESIZE_FLG = 0x01, +}; + +/* * Compatibility constants used by internal volumes. * * @UBI_COMPAT_DELETE: delete this internal volume before anything is written @@ -262,7 +299,9 @@ struct ubi_vid_hdr { /* The layout volume contains the volume table */ -#define UBI_LAYOUT_VOL_ID UBI_INTERNAL_VOL_START +#define UBI_LAYOUT_VOLUME_ID UBI_INTERNAL_VOL_START +#define UBI_LAYOUT_VOLUME_TYPE UBI_VID_DYNAMIC +#define UBI_LAYOUT_VOLUME_ALIGN 1 #define UBI_LAYOUT_VOLUME_EBS 2 #define UBI_LAYOUT_VOLUME_NAME "layout volume" #define UBI_LAYOUT_VOLUME_COMPAT UBI_COMPAT_REJECT @@ -289,7 +328,8 @@ struct ubi_vid_hdr { * @upd_marker: if volume update was started but not finished * @name_len: volume name length * @name: the volume name - * @padding2: reserved, zeroes + * @flags: volume flags (%UBI_VTBL_AUTORESIZE_FLG) + * @padding: reserved, zeroes * @crc: a CRC32 checksum of the record * * The volume table records are stored in the volume table, which is stored in @@ -324,7 +364,8 @@ struct ubi_vtbl_record { __u8 upd_marker; __be16 name_len; __u8 name[UBI_VOL_NAME_MAX+1]; - __u8 padding2[24]; + __u8 flags; + __u8 padding[23]; __be32 crc; } __attribute__ ((packed)); diff --git a/include/mtd/ubi-user.h b/include/mtd/ubi-user.h index fe06ded0e6b8..a7421f130cc0 100644 --- a/include/mtd/ubi-user.h +++ b/include/mtd/ubi-user.h @@ -22,6 +22,21 @@ #define __UBI_USER_H__ /* + * UBI device creation (the same as MTD device attachment) + * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + * + * MTD devices may be attached using %UBI_IOCATT ioctl command of the UBI + * control device. The caller has to properly fill and pass + * &struct ubi_attach_req object - UBI will attach the MTD device specified in + * the request and return the newly created UBI device number as the ioctl + * return value. + * + * UBI device deletion (the same as MTD device detachment) + * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + * + * An UBI device maybe deleted with %UBI_IOCDET ioctl command of the UBI + * control device. + * * UBI volume creation * ~~~~~~~~~~~~~~~~~~~ * @@ -48,7 +63,7 @@ * * Volume update should be done via the %UBI_IOCVOLUP IOCTL command of the * corresponding UBI volume character device. A pointer to a 64-bit update - * size should be passed to the IOCTL. After then, UBI expects user to write + * size should be passed to the IOCTL. After this, UBI expects user to write * this number of bytes to the volume character device. The update is finished * when the claimed number of bytes is passed. So, the volume update sequence * is something like: @@ -57,14 +72,24 @@ * ioctl(fd, UBI_IOCVOLUP, &image_size); * write(fd, buf, image_size); * close(fd); + * + * Atomic eraseblock change + * ~~~~~~~~~~~~~~~~~~~~~~~~ + * + * Atomic eraseblock change operation is done via the %UBI_IOCEBCH IOCTL + * command of the corresponding UBI volume character device. A pointer to + * &struct ubi_leb_change_req has to be passed to the IOCTL. Then the user is + * expected to write the requested amount of bytes. This is similar to the + * "volume update" IOCTL. */ /* - * When a new volume is created, users may either specify the volume number they - * want to create or to let UBI automatically assign a volume number using this - * constant. + * When a new UBI volume or UBI device is created, users may either specify the + * volume/device number they want to create or to let UBI automatically assign + * the number using these constants. */ #define UBI_VOL_NUM_AUTO (-1) +#define UBI_DEV_NUM_AUTO (-1) /* Maximum volume name length */ #define UBI_MAX_VOLUME_NAME 127 @@ -80,6 +105,15 @@ /* Re-size an UBI volume */ #define UBI_IOCRSVOL _IOW(UBI_IOC_MAGIC, 2, struct ubi_rsvol_req) +/* IOCTL commands of the UBI control character device */ + +#define UBI_CTRL_IOC_MAGIC 'o' + +/* Attach an MTD device */ +#define UBI_IOCATT _IOW(UBI_CTRL_IOC_MAGIC, 64, struct ubi_attach_req) +/* Detach an MTD device */ +#define UBI_IOCDET _IOW(UBI_CTRL_IOC_MAGIC, 65, int32_t) + /* IOCTL commands of UBI volume character devices */ #define UBI_VOL_IOC_MAGIC 'O' @@ -88,6 +122,28 @@ #define UBI_IOCVOLUP _IOW(UBI_VOL_IOC_MAGIC, 0, int64_t) /* An eraseblock erasure command, used for debugging, disabled by default */ #define UBI_IOCEBER _IOW(UBI_VOL_IOC_MAGIC, 1, int32_t) +/* An atomic eraseblock change command */ +#define UBI_IOCEBCH _IOW(UBI_VOL_IOC_MAGIC, 2, int32_t) + +/* Maximum MTD device name length supported by UBI */ +#define MAX_UBI_MTD_NAME_LEN 127 + +/* + * UBI data type hint constants. + * + * UBI_LONGTERM: long-term data + * UBI_SHORTTERM: short-term data + * UBI_UNKNOWN: data persistence is unknown + * + * These constants are used when data is written to UBI volumes in order to + * help the UBI wear-leveling unit to find more appropriate physical + * eraseblocks. + */ +enum { + UBI_LONGTERM = 1, + UBI_SHORTTERM = 2, + UBI_UNKNOWN = 3, +}; /* * UBI volume type constants. @@ -97,22 +153,58 @@ */ enum { UBI_DYNAMIC_VOLUME = 3, - UBI_STATIC_VOLUME = 4 + UBI_STATIC_VOLUME = 4, +}; + +/** + * struct ubi_attach_req - attach MTD device request. + * @ubi_num: UBI device number to create + * @mtd_num: MTD device number to attach + * @vid_hdr_offset: VID header offset (use defaults if %0) + * @padding: reserved for future, not used, has to be zeroed + * + * This data structure is used to specify MTD device UBI has to attach and the + * parameters it has to use. The number which should be assigned to the new UBI + * device is passed in @ubi_num. UBI may automatically assign the number if + * @UBI_DEV_NUM_AUTO is passed. In this case, the device number is returned in + * @ubi_num. + * + * Most applications should pass %0 in @vid_hdr_offset to make UBI use default + * offset of the VID header within physical eraseblocks. The default offset is + * the next min. I/O unit after the EC header. For example, it will be offset + * 512 in case of a 512 bytes page NAND flash with no sub-page support. Or + * it will be 512 in case of a 2KiB page NAND flash with 4 512-byte sub-pages. + * + * But in rare cases, if this optimizes things, the VID header may be placed to + * a different offset. For example, the boot-loader might do things faster if the + * VID header sits at the end of the first 2KiB NAND page with 4 sub-pages. As + * the boot-loader would not normally need to read EC headers (unless it needs + * UBI in RW mode), it might be faster to calculate ECC. This is weird example, + * but it real-life example. So, in this example, @vid_hdr_offer would be + * 2KiB-64 bytes = 1984. Note, that this position is not even 512-bytes + * aligned, which is OK, as UBI is clever enough to realize this is 4th sub-page + * of the first page and add needed padding. + */ +struct ubi_attach_req { + int32_t ubi_num; + int32_t mtd_num; + int32_t vid_hdr_offset; + uint8_t padding[12]; }; /** * struct ubi_mkvol_req - volume description data structure used in - * volume creation requests. + * volume creation requests. * @vol_id: volume number * @alignment: volume alignment * @bytes: volume size in bytes * @vol_type: volume type (%UBI_DYNAMIC_VOLUME or %UBI_STATIC_VOLUME) - * @padding1: reserved for future, not used + * @padding1: reserved for future, not used, has to be zeroed * @name_len: volume name length - * @padding2: reserved for future, not used + * @padding2: reserved for future, not used, has to be zeroed * @name: volume name * - * This structure is used by userspace programs when creating new volumes. The + * This structure is used by user-space programs when creating new volumes. The * @used_bytes field is only necessary when creating static volumes. * * The @alignment field specifies the required alignment of the volume logical @@ -139,7 +231,7 @@ struct ubi_mkvol_req { int8_t padding1; int16_t name_len; int8_t padding2[4]; - char name[UBI_MAX_VOLUME_NAME+1]; + char name[UBI_MAX_VOLUME_NAME + 1]; } __attribute__ ((packed)); /** @@ -158,4 +250,19 @@ struct ubi_rsvol_req { int32_t vol_id; } __attribute__ ((packed)); +/** + * struct ubi_leb_change_req - a data structure used in atomic logical + * eraseblock change requests. + * @lnum: logical eraseblock number to change + * @bytes: how many bytes will be written to the logical eraseblock + * @dtype: data type (%UBI_LONGTERM, %UBI_SHORTTERM, %UBI_UNKNOWN) + * @padding: reserved for future, not used, has to be zeroed + */ +struct ubi_leb_change_req { + int32_t lnum; + int32_t bytes; + uint8_t dtype; + uint8_t padding[7]; +} __attribute__ ((packed)); + #endif /* __UBI_USER_H__ */ |