diff options
Diffstat (limited to 'drivers/mtd/devices')
| -rw-r--r-- | drivers/mtd/devices/Kconfig | 7 | ||||
| -rw-r--r-- | drivers/mtd/devices/Makefile | 1 | ||||
| -rw-r--r-- | drivers/mtd/devices/ps3vram.c | 768 |
3 files changed, 776 insertions, 0 deletions
diff --git a/drivers/mtd/devices/Kconfig b/drivers/mtd/devices/Kconfig index 6fde0a2e3567..bc33200535fc 100644 --- a/drivers/mtd/devices/Kconfig +++ b/drivers/mtd/devices/Kconfig @@ -120,6 +120,13 @@ config MTD_PHRAM doesn't have access to, memory beyond the mem=xxx limit, nvram, memory on the video card, etc... +config MTD_PS3VRAM + tristate "PS3 video RAM" + depends on FB_PS3 + help + This driver allows you to use excess PS3 video RAM as volatile + storage or system swap. + config MTD_LART tristate "28F160xx flash driver for LART" depends on SA1100_LART diff --git a/drivers/mtd/devices/Makefile b/drivers/mtd/devices/Makefile index 0993d5cf3923..e51521df4e40 100644 --- a/drivers/mtd/devices/Makefile +++ b/drivers/mtd/devices/Makefile @@ -16,3 +16,4 @@ obj-$(CONFIG_MTD_LART) += lart.o obj-$(CONFIG_MTD_BLOCK2MTD) += block2mtd.o obj-$(CONFIG_MTD_DATAFLASH) += mtd_dataflash.o obj-$(CONFIG_MTD_M25P80) += m25p80.o +obj-$(CONFIG_MTD_PS3VRAM) += ps3vram.o diff --git a/drivers/mtd/devices/ps3vram.c b/drivers/mtd/devices/ps3vram.c new file mode 100644 index 000000000000..d21e9beb7ed2 --- /dev/null +++ b/drivers/mtd/devices/ps3vram.c @@ -0,0 +1,768 @@ +/** + * ps3vram - Use extra PS3 video ram as MTD block device. + * + * Copyright (c) 2007-2008 Jim Paris <jim@jtan.com> + * Added support RSX DMA Vivien Chappelier <vivien.chappelier@free.fr> + */ + +#include <linux/io.h> +#include <linux/mm.h> +#include <linux/init.h> +#include <linux/kernel.h> +#include <linux/list.h> +#include <linux/module.h> +#include <linux/moduleparam.h> +#include <linux/slab.h> +#include <linux/version.h> +#include <linux/gfp.h> +#include <linux/delay.h> +#include <linux/mtd/mtd.h> + +#include <asm/lv1call.h> +#include <asm/ps3.h> + +#define DEVICE_NAME "ps3vram" + +#define XDR_BUF_SIZE (2 * 1024 * 1024) /* XDR buffer (must be 1MiB aligned) */ +#define XDR_IOIF 0x0c000000 + +#define FIFO_BASE XDR_IOIF +#define FIFO_SIZE (64 * 1024) + +#define DMA_PAGE_SIZE (4 * 1024) + +#define CACHE_PAGE_SIZE (256 * 1024) +#define CACHE_PAGE_COUNT ((XDR_BUF_SIZE - FIFO_SIZE) / CACHE_PAGE_SIZE) + +#define CACHE_OFFSET CACHE_PAGE_SIZE +#define FIFO_OFFSET 0 + +#define CTRL_PUT 0x10 +#define CTRL_GET 0x11 +#define CTRL_TOP 0x15 + +#define UPLOAD_SUBCH 1 +#define DOWNLOAD_SUBCH 2 + +#define NV_MEMORY_TO_MEMORY_FORMAT_OFFSET_IN 0x0000030c +#define NV_MEMORY_TO_MEMORY_FORMAT_NOTIFY 0x00000104 + +#define L1GPU_CONTEXT_ATTRIBUTE_FB_BLIT 0x601 + +struct mtd_info ps3vram_mtd; + +#define CACHE_PAGE_PRESENT 1 +#define CACHE_PAGE_DIRTY 2 + +struct ps3vram_tag { + unsigned int address; + unsigned int flags; +}; + +struct ps3vram_cache { + unsigned int page_count; + unsigned int page_size; + struct ps3vram_tag *tags; +}; + +struct ps3vram_priv { + u64 memory_handle; + u64 context_handle; + u32 *ctrl; + u32 *reports; + u8 __iomem *ddr_base; + u8 *xdr_buf; + + u32 *fifo_base; + u32 *fifo_ptr; + + struct device *dev; + struct ps3vram_cache cache; + + /* Used to serialize cache/DMA operations */ + struct mutex lock; +}; + +#define DMA_NOTIFIER_HANDLE_BASE 0x66604200 /* first DMA notifier handle */ +#define DMA_NOTIFIER_OFFSET_BASE 0x1000 /* first DMA notifier offset */ +#define DMA_NOTIFIER_SIZE 0x40 +#define NOTIFIER 7 /* notifier used for completion report */ + +/* A trailing '-' means to subtract off ps3fb_videomemory.size */ +char *size = "256M-"; +module_param(size, charp, 0); +MODULE_PARM_DESC(size, "memory size"); + +static u32 *ps3vram_get_notifier(u32 *reports, int notifier) +{ + return (void *) reports + + DMA_NOTIFIER_OFFSET_BASE + + DMA_NOTIFIER_SIZE * notifier; +} + +static void ps3vram_notifier_reset(struct mtd_info *mtd) +{ + int i; + + struct ps3vram_priv *priv = mtd->priv; + u32 *notify = ps3vram_get_notifier(priv->reports, NOTIFIER); + for (i = 0; i < 4; i++) + notify[i] = 0xffffffff; +} + +static int ps3vram_notifier_wait(struct mtd_info *mtd, unsigned int timeout_ms) +{ + struct ps3vram_priv *priv = mtd->priv; + u32 *notify = ps3vram_get_notifier(priv->reports, NOTIFIER); + unsigned long timeout = jiffies + msecs_to_jiffies(timeout_ms); + + do { + if (!notify[3]) + return 0; + msleep(1); + } while (time_before(jiffies, timeout)); + + return -ETIMEDOUT; +} + +static void ps3vram_init_ring(struct mtd_info *mtd) +{ + struct ps3vram_priv *priv = mtd->priv; + + priv->ctrl[CTRL_PUT] = FIFO_BASE + FIFO_OFFSET; + priv->ctrl[CTRL_GET] = FIFO_BASE + FIFO_OFFSET; +} + +static int ps3vram_wait_ring(struct mtd_info *mtd, unsigned int timeout_ms) +{ + struct ps3vram_priv *priv = mtd->priv; + unsigned long timeout = jiffies + msecs_to_jiffies(timeout_ms); + + do { + if (priv->ctrl[CTRL_PUT] == priv->ctrl[CTRL_GET]) + return 0; + msleep(1); + } while (time_before(jiffies, timeout)); + + dev_dbg(priv->dev, "%s:%d: FIFO timeout (%08x/%08x/%08x)\n", __func__, + __LINE__, priv->ctrl[CTRL_PUT], priv->ctrl[CTRL_GET], + priv->ctrl[CTRL_TOP]); + + return -ETIMEDOUT; +} + +static void ps3vram_out_ring(struct ps3vram_priv *priv, u32 data) +{ + *(priv->fifo_ptr)++ = data; +} + +static void ps3vram_begin_ring(struct ps3vram_priv *priv, u32 chan, + u32 tag, u32 size) +{ + ps3vram_out_ring(priv, (size << 18) | (chan << 13) | tag); +} + +static void ps3vram_rewind_ring(struct mtd_info *mtd) +{ + struct ps3vram_priv *priv = mtd->priv; + u64 status; + + ps3vram_out_ring(priv, 0x20000000 | (FIFO_BASE + FIFO_OFFSET)); + + priv->ctrl[CTRL_PUT] = FIFO_BASE + FIFO_OFFSET; + + /* asking the HV for a blit will kick the fifo */ + status = lv1_gpu_context_attribute(priv->context_handle, + L1GPU_CONTEXT_ATTRIBUTE_FB_BLIT, + 0, 0, 0, 0); + if (status) + dev_err(priv->dev, "%s:%d: lv1_gpu_context_attribute failed\n", + __func__, __LINE__); + + priv->fifo_ptr = priv->fifo_base; +} + +static void ps3vram_fire_ring(struct mtd_info *mtd) +{ + struct ps3vram_priv *priv = mtd->priv; + u64 status; + + mutex_lock(&ps3_gpu_mutex); + + priv->ctrl[CTRL_PUT] = FIFO_BASE + FIFO_OFFSET + + (priv->fifo_ptr - priv->fifo_base) * sizeof(u32); + + /* asking the HV for a blit will kick the fifo */ + status = lv1_gpu_context_attribute(priv->context_handle, + L1GPU_CONTEXT_ATTRIBUTE_FB_BLIT, + 0, 0, 0, 0); + if (status) + dev_err(priv->dev, "%s:%d: lv1_gpu_context_attribute failed\n", + __func__, __LINE__); + + if ((priv->fifo_ptr - priv->fifo_base) * sizeof(u32) > + FIFO_SIZE - 1024) { + dev_dbg(priv->dev, "%s:%d: fifo full, rewinding\n", __func__, + __LINE__); + ps3vram_wait_ring(mtd, 200); + ps3vram_rewind_ring(mtd); + } + + mutex_unlock(&ps3_gpu_mutex); +} + +static void ps3vram_bind(struct mtd_info *mtd) +{ + struct ps3vram_priv *priv = mtd->priv; + + ps3vram_begin_ring(priv, UPLOAD_SUBCH, 0, 1); + ps3vram_out_ring(priv, 0x31337303); + ps3vram_begin_ring(priv, UPLOAD_SUBCH, 0x180, 3); + ps3vram_out_ring(priv, DMA_NOTIFIER_HANDLE_BASE + NOTIFIER); + ps3vram_out_ring(priv, 0xfeed0001); /* DMA system RAM instance */ + ps3vram_out_ring(priv, 0xfeed0000); /* DMA video RAM instance */ + + ps3vram_begin_ring(priv, DOWNLOAD_SUBCH, 0, 1); + ps3vram_out_ring(priv, 0x3137c0de); + ps3vram_begin_ring(priv, DOWNLOAD_SUBCH, 0x180, 3); + ps3vram_out_ring(priv, DMA_NOTIFIER_HANDLE_BASE + NOTIFIER); + ps3vram_out_ring(priv, 0xfeed0000); /* DMA video RAM instance */ + ps3vram_out_ring(priv, 0xfeed0001); /* DMA system RAM instance */ + + ps3vram_fire_ring(mtd); +} + +static int ps3vram_upload(struct mtd_info *mtd, unsigned int src_offset, + unsigned int dst_offset, int len, int count) +{ + struct ps3vram_priv *priv = mtd->priv; + + ps3vram_begin_ring(priv, UPLOAD_SUBCH, + NV_MEMORY_TO_MEMORY_FORMAT_OFFSET_IN, 8); + ps3vram_out_ring(priv, XDR_IOIF + src_offset); + ps3vram_out_ring(priv, dst_offset); + ps3vram_out_ring(priv, len); + ps3vram_out_ring(priv, len); + ps3vram_out_ring(priv, len); + ps3vram_out_ring(priv, count); + ps3vram_out_ring(priv, (1 << 8) | 1); + ps3vram_out_ring(priv, 0); + + ps3vram_notifier_reset(mtd); + ps3vram_begin_ring(priv, UPLOAD_SUBCH, + NV_MEMORY_TO_MEMORY_FORMAT_NOTIFY, 1); + ps3vram_out_ring(priv, 0); + ps3vram_begin_ring(priv, UPLOAD_SUBCH, 0x100, 1); + ps3vram_out_ring(priv, 0); + ps3vram_fire_ring(mtd); + if (ps3vram_notifier_wait(mtd, 200) < 0) { + dev_dbg(priv->dev, "%s:%d: notifier timeout\n", __func__, + __LINE__); + return -1; + } + + return 0; +} + +static int ps3vram_download(struct mtd_info *mtd, unsigned int src_offset, + unsigned int dst_offset, int len, int count) +{ + struct ps3vram_priv *priv = mtd->priv; + + ps3vram_begin_ring(priv, DOWNLOAD_SUBCH, + NV_MEMORY_TO_MEMORY_FORMAT_OFFSET_IN, 8); + ps3vram_out_ring(priv, src_offset); + ps3vram_out_ring(priv, XDR_IOIF + dst_offset); + ps3vram_out_ring(priv, len); + ps3vram_out_ring(priv, len); + ps3vram_out_ring(priv, len); + ps3vram_out_ring(priv, count); + ps3vram_out_ring(priv, (1 << 8) | 1); + ps3vram_out_ring(priv, 0); + + ps3vram_notifier_reset(mtd); + ps3vram_begin_ring(priv, DOWNLOAD_SUBCH, + NV_MEMORY_TO_MEMORY_FORMAT_NOTIFY, 1); + ps3vram_out_ring(priv, 0); + ps3vram_begin_ring(priv, DOWNLOAD_SUBCH, 0x100, 1); + ps3vram_out_ring(priv, 0); + ps3vram_fire_ring(mtd); + if (ps3vram_notifier_wait(mtd, 200) < 0) { + dev_dbg(priv->dev, "%s:%d: notifier timeout\n", __func__, + __LINE__); + return -1; + } + + return 0; +} + +static void ps3vram_cache_evict(struct mtd_info *mtd, int entry) +{ + struct ps3vram_priv *priv = mtd->priv; + struct ps3vram_cache *cache = &priv->cache; + + if (cache->tags[entry].flags & CACHE_PAGE_DIRTY) { + dev_dbg(priv->dev, "%s:%d: flushing %d : 0x%08x\n", __func__, + __LINE__, entry, cache->tags[entry].address); + if (ps3vram_upload(mtd, + CACHE_OFFSET + entry * cache->page_size, + cache->tags[entry].address, + DMA_PAGE_SIZE, + cache->page_size / DMA_PAGE_SIZE) < 0) { + dev_dbg(priv->dev, "%s:%d: failed to upload from " + "0x%x to 0x%x size 0x%x\n", __func__, __LINE__, + entry * cache->page_size, + cache->tags[entry].address, cache->page_size); + } + cache->tags[entry].flags &= ~CACHE_PAGE_DIRTY; + } +} + +static void ps3vram_cache_load(struct mtd_info *mtd, int entry, + unsigned int address) +{ + struct ps3vram_priv *priv = mtd->priv; + struct ps3vram_cache *cache = &priv->cache; + + dev_dbg(priv->dev, "%s:%d: fetching %d : 0x%08x\n", __func__, __LINE__, + entry, address); + if (ps3vram_download(mtd, + address, + CACHE_OFFSET + entry * cache->page_size, + DMA_PAGE_SIZE, + cache->page_size / DMA_PAGE_SIZE) < 0) { + dev_err(priv->dev, "%s:%d: failed to download from " + "0x%x to 0x%x size 0x%x\n", __func__, __LINE__, address, + entry * cache->page_size, cache->page_size); + } + + cache->tags[entry].address = address; + cache->tags[entry].flags |= CACHE_PAGE_PRESENT; +} + + +static void ps3vram_cache_flush(struct mtd_info *mtd) +{ + struct ps3vram_priv *priv = mtd->priv; + struct ps3vram_cache *cache = &priv->cache; + int i; + + dev_dbg(priv->dev, "%s:%d: FLUSH\n", __func__, __LINE__); + for (i = 0; i < cache->page_count; i++) { + ps3vram_cache_evict(mtd, i); + cache->tags[i].flags = 0; + } +} + +static unsigned int ps3vram_cache_match(struct mtd_info *mtd, loff_t address) +{ + struct ps3vram_priv *priv = mtd->priv; + struct ps3vram_cache *cache = &priv->cache; + unsigned int base; + unsigned int offset; + int i; + static int counter; + + offset = (unsigned int) (address & (cache->page_size - 1)); + base = (unsigned int) (address - offset); + + /* fully associative check */ + for (i = 0; i < cache->page_count; i++) { + if ((cache->tags[i].flags & CACHE_PAGE_PRESENT) && + cache->tags[i].address == base) { + dev_dbg(priv->dev, "%s:%d: found entry %d : 0x%08x\n", + __func__, __LINE__, i, cache->tags[i].address); + return i; + } + } + + /* choose a random entry */ + i = (jiffies + (counter++)) % cache->page_count; + dev_dbg(priv->dev, "%s:%d: using entry %d\n", __func__, __LINE__, i); + + ps3vram_cache_evict(mtd, i); + ps3vram_cache_load(mtd, i, base); + + return i; +} + +static int ps3vram_cache_init(struct mtd_info *mtd) +{ + struct ps3vram_priv *priv = mtd->priv; + + priv->cache.page_count = CACHE_PAGE_COUNT; + priv->cache.page_size = CACHE_PAGE_SIZE; + priv->cache.tags = kzalloc(sizeof(struct ps3vram_tag) * + CACHE_PAGE_COUNT, GFP_KERNEL); + if (priv->cache.tags == NULL) { + dev_err(priv->dev, "%s:%d: could not allocate cache tags\n", + __func__, __LINE__); + return -ENOMEM; + } + + dev_info(priv->dev, "created ram cache: %d entries, %d KiB each\n", + CACHE_PAGE_COUNT, CACHE_PAGE_SIZE / 1024); + + return 0; +} + +static void ps3vram_cache_cleanup(struct mtd_info *mtd) +{ + struct ps3vram_priv *priv = mtd->priv; + + ps3vram_cache_flush(mtd); + kfree(priv->cache.tags); +} + +static int ps3vram_erase(struct mtd_info *mtd, struct erase_info *instr) +{ + struct ps3vram_priv *priv = mtd->priv; + + if (instr->addr + instr->len > mtd->size) + return -EINVAL; + + mutex_lock(&priv->lock); + + ps3vram_cache_flush(mtd); + + /* Set bytes to 0xFF */ + memset_io(priv->ddr_base + instr->addr, 0xFF, instr->len); + + mutex_unlock(&priv->lock); + + instr->state = MTD_ERASE_DONE; + mtd_erase_callback(instr); + + return 0; +} + +static int ps3vram_read(struct mtd_info *mtd, loff_t from, size_t len, + size_t *retlen, u_char *buf) +{ + struct ps3vram_priv *priv = mtd->priv; + unsigned int cached, count; + + dev_dbg(priv->dev, "%s:%d: from=0x%08x len=0x%zx\n", __func__, __LINE__, + (unsigned int)from, len); + + if (from >= mtd->size) + return -EINVAL; + + if (len > mtd->size - from) + len = mtd->size - from; + + /* Copy from vram to buf */ + count = len; + while (count) { + unsigned int offset, avail; + unsigned int entry; + + offset = (unsigned int) (from & (priv->cache.page_size - 1)); + avail = priv->cache.page_size - offset; + + mutex_lock(&priv->lock); + + entry = ps3vram_cache_match(mtd, from); + cached = CACHE_OFFSET + entry * priv->cache.page_size + offset; + + dev_dbg(priv->dev, "%s:%d: from=%08x cached=%08x offset=%08x " + "avail=%08x count=%08x\n", __func__, __LINE__, + (unsigned int)from, cached, offset, avail, count); + + if (avail > count) + avail = count; + memcpy(buf, priv->xdr_buf + cached, avail); + + mutex_unlock(&priv->lock); + + buf += avail; + count -= avail; + from += avail; + } + + *retlen = len; + return 0; +} + +static int ps3vram_write(struct mtd_info *mtd, loff_t to, size_t len, + size_t *retlen, const u_char *buf) +{ + struct ps3vram_priv *priv = mtd->priv; + unsigned int cached, count; + + if (to >= mtd->size) + return -EINVAL; + + if (len > mtd->size - to) + len = mtd->size - to; + + /* Copy from buf to vram */ + count = len; + while (count) { + unsigned int offset, avail; + unsigned int entry; + + offset = (unsigned int) (to & (priv->cache.page_size - 1)); + avail = priv->cache.page_size - offset; + + mutex_lock(&priv->lock); + + entry = ps3vram_cache_match(mtd, to); + cached = CACHE_OFFSET + entry * priv->cache.page_size + offset; + + dev_dbg(priv->dev, "%s:%d: to=%08x cached=%08x offset=%08x " + "avail=%08x count=%08x\n", __func__, __LINE__, + (unsigned int)to, cached, offset, avail, count); + + if (avail > count) + avail = count; + memcpy(priv->xdr_buf + cached, buf, avail); + + priv->cache.tags[entry].flags |= CACHE_PAGE_DIRTY; + + mutex_unlock(&priv->lock); + + buf += avail; + count -= avail; + to += avail; + } + + *retlen = len; + return 0; +} + +static int __devinit ps3vram_probe(struct ps3_system_bus_device *dev) +{ + struct ps3vram_priv *priv; + int status; + u64 ddr_lpar; + u64 ctrl_lpar; + u64 info_lpar; + u64 reports_lpar; + u64 ddr_size; + u64 reports_size; + int ret = -ENOMEM; + char *rest; + + ret = -EIO; + ps3vram_mtd.priv = kzalloc(sizeof(struct ps3vram_priv), GFP_KERNEL); + if (!ps3vram_mtd.priv) + goto out; + priv = ps3vram_mtd.priv; + + mutex_init(&priv->lock); + priv->dev = &dev->core; + + /* Allocate XDR buffer (1MiB aligned) */ + priv->xdr_buf = (void *)__get_free_pages(GFP_KERNEL, + get_order(XDR_BUF_SIZE)); + if (priv->xdr_buf == NULL) { + dev_dbg(&dev->core, "%s:%d: could not allocate XDR buffer\n", + __func__, __LINE__); + ret = -ENOMEM; + goto out_free_priv; + } + + /* Put FIFO at begginning of XDR buffer */ + priv->fifo_base = (u32 *) (priv->xdr_buf + FIFO_OFFSET); + priv->fifo_ptr = priv->fifo_base; + + /* XXX: Need to open GPU, in case ps3fb or snd_ps3 aren't loaded */ + if (ps3_open_hv_device(dev)) { + dev_err(&dev->core, "%s:%d: ps3_open_hv_device failed\n", + __func__, __LINE__); + ret = -EAGAIN; + goto out_close_gpu; + } + + /* Request memory */ + status = -1; + ddr_size = memparse(size, &rest); + if (*rest == '-') + ddr_size -= ps3fb_videomemory.size; + ddr_size = ALIGN(ddr_size, 1024*1024); + if (ddr_size <= 0) { + dev_err(&dev->core, "%s:%d: specified size is too small\n", + __func__, __LINE__); + ret = -EINVAL; + goto out_close_gpu; + } + + while (ddr_size > 0) { + status = lv1_gpu_memory_allocate(ddr_size, 0, 0, 0, 0, + &priv->memory_handle, + &ddr_lpar); + if (!status) + break; + ddr_size -= 1024*1024; + } + if (status || ddr_size <= 0) { + dev_err(&dev->core, "%s:%d: lv1_gpu_memory_allocate failed\n", + __func__, __LINE__); + ret = -ENOMEM; + goto out_free_xdr_buf; + } + + /* Request context */ + status = lv1_gpu_context_allocate(priv->memory_handle, + 0, + &priv->context_handle, + &ctrl_lpar, + &info_lpar, + &reports_lpar, + &reports_size); + if (status) { + dev_err(&dev->core, "%s:%d: lv1_gpu_context_allocate failed\n", + __func__, __LINE__); + ret = -ENOMEM; + goto out_free_memory; + } + + /* Map XDR buffer to RSX */ + status = lv1_gpu_context_iomap(priv->context_handle, XDR_IOIF, + ps3_mm_phys_to_lpar(__pa(priv->xdr_buf)), + XDR_BUF_SIZE, 0); + if (status) { + dev_err(&dev->core, "%s:%d: lv1_gpu_context_iomap failed\n", + __func__, __LINE__); + ret = -ENOMEM; + goto out_free_context; + } + + priv->ddr_base = ioremap_flags(ddr_lpar, ddr_size, _PAGE_NO_CACHE); + + if (!priv->ddr_base) { + dev_err(&dev->core, "%s:%d: ioremap failed\n", __func__, + __LINE__); + ret = -ENOMEM; + goto out_free_context; + } + + priv->ctrl = ioremap(ctrl_lpar, 64 * 1024); + if (!priv->ctrl) { + dev_err(&dev->core, "%s:%d: ioremap failed\n", __func__, + __LINE__); + ret = -ENOMEM; + goto out_unmap_vram; + } + + priv->reports = ioremap(reports_lpar, reports_size); + if (!priv->reports) { + dev_err(&dev->core, "%s:%d: ioremap failed\n", __func__, + __LINE__); + ret = -ENOMEM; + goto out_unmap_ctrl; + } + + mutex_lock(&ps3_gpu_mutex); + ps3vram_init_ring(&ps3vram_mtd); + mutex_unlock(&ps3_gpu_mutex); + + ps3vram_mtd.name = "ps3vram"; + ps3vram_mtd.size = ddr_size; + ps3vram_mtd.flags = MTD_CAP_RAM; + ps3vram_mtd.erase = ps3vram_erase; + ps3vram_mtd.point = NULL; + ps3vram_mtd.unpoint = NULL; + ps3vram_mtd.read = ps3vram_read; + ps3vram_mtd.write = ps3vram_write; + ps3vram_mtd.owner = THIS_MODULE; + ps3vram_mtd.type = MTD_RAM; + ps3vram_mtd.erasesize = CACHE_PAGE_SIZE; + ps3vram_mtd.writesize = 1; + + ps3vram_bind(&ps3vram_mtd); + + mutex_lock(&ps3_gpu_mutex); + ret = ps3vram_wait_ring(&ps3vram_mtd, 100); + mutex_unlock(&ps3_gpu_mutex); + if (ret < 0) { + dev_err(&dev->core, "%s:%d: failed to initialize channels\n", + __func__, __LINE__); + ret = -ETIMEDOUT; + goto out_unmap_reports; + } + + ps3vram_cache_init(&ps3vram_mtd); + + if (add_mtd_device(&ps3vram_mtd)) { + dev_err(&dev->core, "%s:%d: add_mtd_device failed\n", + __func__, __LINE__); + ret = -EAGAIN; + goto out_cache_cleanup; + } + + dev_info(&dev->core, "reserved %u MiB of gpu memory\n", + (unsigned int)(ddr_size / 1024 / 1024)); + + return 0; + +out_cache_cleanup: + ps3vram_cache_cleanup(&ps3vram_mtd); +out_unmap_reports: + iounmap(priv->reports); +out_unmap_ctrl: + iounmap(priv->ctrl); +out_unmap_vram: + iounmap(priv->ddr_base); +out_free_context: + lv1_gpu_context_free(priv->context_handle); +out_free_memory: + lv1_gpu_memory_free(priv->memory_handle); +out_close_gpu: + ps3_close_hv_device(dev); +out_free_xdr_buf: + free_pages((unsigned long) priv->xdr_buf, get_order(XDR_BUF_SIZE)); +out_free_priv: + kfree(ps3vram_mtd.priv); + ps3vram_mtd.priv = NULL; +out: + return ret; +} + +static int ps3vram_shutdown(struct ps3_system_bus_device *dev) +{ + struct ps3vram_priv *priv; + + priv = ps3vram_mtd.priv; + + del_mtd_device(&ps3vram_mtd); + ps3vram_cache_cleanup(&ps3vram_mtd); + iounmap(priv->reports); + iounmap(priv->ctrl); + iounmap(priv->ddr_base); + lv1_gpu_context_free(priv->context_handle); + lv1_gpu_memory_free(priv->memory_handle); + ps3_close_hv_device(dev); + free_pages((unsigned long) priv->xdr_buf, get_order(XDR_BUF_SIZE)); + kfree(priv); + return 0; +} + +static struct ps3_system_bus_driver ps3vram_driver = { + .match_id = PS3_MATCH_ID_GPU, + .match_sub_id = PS3_MATCH_SUB_ID_GPU_RAMDISK, + .core.name = DEVICE_NAME, + .core.owner = THIS_MODULE, + .probe = ps3vram_probe, + .remove = ps3vram_shutdown, + .shutdown = ps3vram_shutdown, +}; + +static int __init ps3vram_init(void) +{ + return ps3_system_bus_driver_register(&ps3vram_driver); +} + +static void __exit ps3vram_exit(void) +{ + ps3_system_bus_driver_unregister(&ps3vram_driver); +} + +module_init(ps3vram_init); +module_exit(ps3vram_exit); + +MODULE_LICENSE("GPL"); +MODULE_AUTHOR("Jim Paris <jim@jtan.com>"); +MODULE_DESCRIPTION("MTD driver for PS3 video RAM"); +MODULE_ALIAS(PS3_MODULE_ALIAS_GPU_RAMDISK); |