diff options
Diffstat (limited to 'drivers/scsi/ultrastor.c')
| -rw-r--r-- | drivers/scsi/ultrastor.c | 1210 |
1 files changed, 0 insertions, 1210 deletions
diff --git a/drivers/scsi/ultrastor.c b/drivers/scsi/ultrastor.c deleted file mode 100644 index 14e0c40a68c9..000000000000 --- a/drivers/scsi/ultrastor.c +++ /dev/null @@ -1,1210 +0,0 @@ -/* - * ultrastor.c Copyright (C) 1992 David B. Gentzel - * Low-level SCSI driver for UltraStor 14F, 24F, and 34F - * by David B. Gentzel, Whitfield Software Services, Carnegie, PA - * (gentzel@nova.enet.dec.com) - * scatter/gather added by Scott Taylor (n217cg@tamuts.tamu.edu) - * 24F and multiple command support by John F. Carr (jfc@athena.mit.edu) - * John's work modified by Caleb Epstein (cae@jpmorgan.com) and - * Eric Youngdale (ericy@cais.com). - * Thanks to UltraStor for providing the necessary documentation - * - * This is an old driver, for the 14F and 34F you should be using the - * u14-34f driver instead. - */ - -/* - * TODO: - * 1. Find out why scatter/gather is limited to 16 requests per command. - * This is fixed, at least on the 24F, as of version 1.12 - CAE. - * 2. Look at command linking (mscp.command_link and - * mscp.command_link_id). (Does not work with many disks, - * and no performance increase. ERY). - * 3. Allow multiple adapters. - */ - -/* - * NOTES: - * The UltraStor 14F, 24F, and 34F are a family of intelligent, high - * performance SCSI-2 host adapters. They all support command queueing - * and scatter/gather I/O. Some of them can also emulate the standard - * WD1003 interface for use with OS's which don't support SCSI. Here - * is the scoop on the various models: - * 14F - ISA first-party DMA HA with floppy support and WD1003 emulation. - * 14N - ISA HA with floppy support. I think that this is a non-DMA - * HA. Nothing further known. - * 24F - EISA Bus Master HA with floppy support and WD1003 emulation. - * 34F - VL-Bus Bus Master HA with floppy support (no WD1003 emulation). - * - * The 14F, 24F, and 34F are supported by this driver. - * - * Places flagged with a triple question-mark are things which are either - * unfinished, questionable, or wrong. - */ - -/* Changes from version 1.11 alpha to 1.12 - * - * Increased the size of the scatter-gather list to 33 entries for - * the 24F adapter (it was 16). I don't have the specs for the 14F - * or the 34F, so they may support larger s-g lists as well. - * - * Caleb Epstein <cae@jpmorgan.com> - */ - -/* Changes from version 1.9 to 1.11 - * - * Patches to bring this driver up to speed with the default kernel - * driver which supports only the 14F and 34F adapters. This version - * should compile cleanly into 0.99.13, 0.99.12 and probably 0.99.11. - * - * Fixes from Eric Youngdale to fix a few possible race conditions and - * several problems with bit testing operations (insufficient - * parentheses). - * - * Removed the ultrastor_abort() and ultrastor_reset() functions - * (enclosed them in #if 0 / #endif). These functions, at least on - * the 24F, cause the SCSI bus to do odd things and generally lead to - * kernel panics and machine hangs. This is like the Adaptec code. - * - * Use check/snarf_region for 14f, 34f to avoid I/O space address conflicts. - */ - -/* Changes from version 1.8 to version 1.9 - * - * 0.99.11 patches (cae@jpmorgan.com) */ - -/* Changes from version 1.7 to version 1.8 - * - * Better error reporting. - */ - -/* Changes from version 1.6 to version 1.7 - * - * Removed CSIR command code. - * - * Better race condition avoidance (xchgb function added). - * - * Set ICM and OGM status to zero at probe (24F) - * - * reset sends soft reset to UltraStor adapter - * - * reset adapter if adapter interrupts with an invalid MSCP address - * - * handle aborted command interrupt (24F) - * - */ - -/* Changes from version 1.5 to version 1.6: - * - * Read MSCP address from ICM _before_ clearing the interrupt flag. - * This fixes a race condition. - */ - -/* Changes from version 1.4 to version 1.5: - * - * Abort now calls done when multiple commands are enabled. - * - * Clear busy when aborted command finishes, not when abort is called. - * - * More debugging messages for aborts. - */ - -/* Changes from version 1.3 to version 1.4: - * - * Enable automatic request of sense data on error (requires newer version - * of scsi.c to be useful). - * - * Fix PORT_OVERRIDE for 14F. - * - * Fix abort and reset to work properly (config.aborted wasn't cleared - * after it was tested, so after a command abort no further commands would - * work). - * - * Boot time test to enable SCSI bus reset (defaults to not allowing reset). - * - * Fix test for OGM busy -- the busy bit is in different places on the 24F. - * - * Release ICM slot by clearing first byte on 24F. - */ - -#include <linux/module.h> -#include <linux/blkdev.h> -#include <linux/interrupt.h> -#include <linux/stddef.h> -#include <linux/string.h> -#include <linux/kernel.h> -#include <linux/ioport.h> -#include <linux/proc_fs.h> -#include <linux/spinlock.h> -#include <linux/stat.h> -#include <linux/bitops.h> -#include <linux/delay.h> - -#include <asm/io.h> -#include <asm/dma.h> - -#define ULTRASTOR_PRIVATE /* Get the private stuff from ultrastor.h */ -#include "scsi.h" -#include <scsi/scsi_host.h> -#include "ultrastor.h" - -#define FALSE 0 -#define TRUE 1 - -#ifndef ULTRASTOR_DEBUG -#define ULTRASTOR_DEBUG (UD_ABORT|UD_CSIR|UD_RESET) -#endif - -#define VERSION "1.12" - -#define PACKED __attribute__((packed)) -#define ALIGNED(x) __attribute__((aligned(x))) - - -/* The 14F uses an array of 4-byte ints for its scatter/gather list. - The data can be unaligned, but need not be. It's easier to give - the list normal alignment since it doesn't need to fit into a - packed structure. */ - -typedef struct { - u32 address; - u32 num_bytes; -} ultrastor_sg_list; - - -/* MailBox SCSI Command Packet. Basic command structure for communicating - with controller. */ -struct mscp { - unsigned char opcode: 3; /* type of command */ - unsigned char xdir: 2; /* data transfer direction */ - unsigned char dcn: 1; /* disable disconnect */ - unsigned char ca: 1; /* use cache (if available) */ - unsigned char sg: 1; /* scatter/gather operation */ - unsigned char target_id: 3; /* target SCSI id */ - unsigned char ch_no: 2; /* SCSI channel (always 0 for 14f) */ - unsigned char lun: 3; /* logical unit number */ - unsigned int transfer_data PACKED; /* transfer data pointer */ - unsigned int transfer_data_length PACKED; /* length in bytes */ - unsigned int command_link PACKED; /* for linking command chains */ - unsigned char scsi_command_link_id; /* identifies command in chain */ - unsigned char number_of_sg_list; /* (if sg is set) 8 bytes per list */ - unsigned char length_of_sense_byte; - unsigned char length_of_scsi_cdbs; /* 6, 10, or 12 */ - unsigned char scsi_cdbs[12]; /* SCSI commands */ - unsigned char adapter_status; /* non-zero indicates HA error */ - unsigned char target_status; /* non-zero indicates target error */ - u32 sense_data PACKED; - /* The following fields are for software only. They are included in - the MSCP structure because they are associated with SCSI requests. */ - void (*done) (struct scsi_cmnd *); - struct scsi_cmnd *SCint; - ultrastor_sg_list sglist[ULTRASTOR_24F_MAX_SG]; /* use larger size for 24F */ -}; - - -/* Port addresses (relative to the base address) */ -#define U14F_PRODUCT_ID(port) ((port) + 0x4) -#define CONFIG(port) ((port) + 0x6) - -/* Port addresses relative to the doorbell base address. */ -#define LCL_DOORBELL_MASK(port) ((port) + 0x0) -#define LCL_DOORBELL_INTR(port) ((port) + 0x1) -#define SYS_DOORBELL_MASK(port) ((port) + 0x2) -#define SYS_DOORBELL_INTR(port) ((port) + 0x3) - - -/* Used to store configuration info read from config i/o registers. Most of - this is not used yet, but might as well save it. - - This structure also holds port addresses that are not at the same offset - on the 14F and 24F. - - This structure holds all data that must be duplicated to support multiple - adapters. */ - -static struct ultrastor_config -{ - unsigned short port_address; /* base address of card */ - unsigned short doorbell_address; /* base address of doorbell CSRs */ - unsigned short ogm_address; /* base address of OGM */ - unsigned short icm_address; /* base address of ICM */ - const void *bios_segment; - unsigned char interrupt: 4; - unsigned char dma_channel: 3; - unsigned char bios_drive_number: 1; - unsigned char heads; - unsigned char sectors; - unsigned char ha_scsi_id: 3; - unsigned char subversion: 4; - unsigned char revision; - /* The slot number is used to distinguish the 24F (slot != 0) from - the 14F and 34F (slot == 0). */ - unsigned char slot; - -#ifdef PRINT_U24F_VERSION - volatile int csir_done; -#endif - - /* A pool of MSCP structures for this adapter, and a bitmask of - busy structures. (If ULTRASTOR_14F_MAX_CMDS == 1, a 1 byte - busy flag is used instead.) */ - -#if ULTRASTOR_MAX_CMDS == 1 - unsigned char mscp_busy; -#else - unsigned long mscp_free; -#endif - volatile unsigned char aborted[ULTRASTOR_MAX_CMDS]; - struct mscp mscp[ULTRASTOR_MAX_CMDS]; -} config = {0}; - -/* Set this to 1 to reset the SCSI bus on error. */ -static int ultrastor_bus_reset; - - -/* Allowed BIOS base addresses (NULL indicates reserved) */ -static const void *const bios_segment_table[8] = { - NULL, (void *)0xC4000, (void *)0xC8000, (void *)0xCC000, - (void *)0xD0000, (void *)0xD4000, (void *)0xD8000, (void *)0xDC000, -}; - -/* Allowed IRQs for 14f */ -static const unsigned char interrupt_table_14f[4] = { 15, 14, 11, 10 }; - -/* Allowed DMA channels for 14f (0 indicates reserved) */ -static const unsigned char dma_channel_table_14f[4] = { 5, 6, 7, 0 }; - -/* Head/sector mappings allowed by 14f */ -static const struct { - unsigned char heads; - unsigned char sectors; -} mapping_table[4] = { { 16, 63 }, { 64, 32 }, { 64, 63 }, { 64, 32 } }; - -#ifndef PORT_OVERRIDE -/* ??? A probe of address 0x310 screws up NE2000 cards */ -static const unsigned short ultrastor_ports_14f[] = { - 0x330, 0x340, /*0x310,*/ 0x230, 0x240, 0x210, 0x130, 0x140, -}; -#endif - -static void ultrastor_interrupt(void *); -static irqreturn_t do_ultrastor_interrupt(int, void *); -static inline void build_sg_list(struct mscp *, struct scsi_cmnd *SCpnt); - - -/* Always called with host lock held */ - -static inline int find_and_clear_bit_16(unsigned long *field) -{ - int rv; - - if (*field == 0) - panic("No free mscp"); - - asm volatile ( - "xorl %0,%0\n\t" - "0: bsfw %1,%w0\n\t" - "btr %0,%1\n\t" - "jnc 0b" - : "=&r" (rv), "+m" (*field) :); - - return rv; -} - -/* This has been re-implemented with the help of Richard Earnshaw, - <rwe@pegasus.esprit.ec.org> and works with gcc-2.5.8 and gcc-2.6.0. - The instability noted by jfc below appears to be a bug in - gcc-2.5.x when compiling w/o optimization. --Caleb - - This asm is fragile: it doesn't work without the casts and it may - not work without optimization. Maybe I should add a swap builtin - to gcc. --jfc */ -static inline unsigned char xchgb(unsigned char reg, - volatile unsigned char *mem) -{ - __asm__ ("xchgb %0,%1" : "=q" (reg), "=m" (*mem) : "0" (reg)); - return reg; -} - -#if ULTRASTOR_DEBUG & (UD_COMMAND | UD_ABORT) - -/* Always called with the host lock held */ -static void log_ultrastor_abort(struct ultrastor_config *config, - int command) -{ - static char fmt[80] = "abort %d (%x); MSCP free pool: %x;"; - int i; - - for (i = 0; i < ULTRASTOR_MAX_CMDS; i++) - { - fmt[20 + i*2] = ' '; - if (! (config->mscp_free & (1 << i))) - fmt[21 + i*2] = '0' + config->mscp[i].target_id; - else - fmt[21 + i*2] = '-'; - } - fmt[20 + ULTRASTOR_MAX_CMDS * 2] = '\n'; - fmt[21 + ULTRASTOR_MAX_CMDS * 2] = 0; - printk(fmt, command, &config->mscp[command], config->mscp_free); - -} -#endif - -static int ultrastor_14f_detect(struct scsi_host_template * tpnt) -{ - size_t i; - unsigned char in_byte, version_byte = 0; - struct config_1 { - unsigned char bios_segment: 3; - unsigned char removable_disks_as_fixed: 1; - unsigned char interrupt: 2; - unsigned char dma_channel: 2; - } config_1; - struct config_2 { - unsigned char ha_scsi_id: 3; - unsigned char mapping_mode: 2; - unsigned char bios_drive_number: 1; - unsigned char tfr_port: 2; - } config_2; - -#if (ULTRASTOR_DEBUG & UD_DETECT) - printk("US14F: detect: called\n"); -#endif - - /* If a 24F has already been configured, don't look for a 14F. */ - if (config.bios_segment) - return FALSE; - -#ifdef PORT_OVERRIDE - if(!request_region(PORT_OVERRIDE, 0xc, "ultrastor")) { - printk("Ultrastor I/O space already in use\n"); - return FALSE; - }; - config.port_address = PORT_OVERRIDE; -#else - for (i = 0; i < ARRAY_SIZE(ultrastor_ports_14f); i++) { - if(!request_region(ultrastor_ports_14f[i], 0x0c, "ultrastor")) continue; - config.port_address = ultrastor_ports_14f[i]; -#endif - -#if (ULTRASTOR_DEBUG & UD_DETECT) - printk("US14F: detect: testing port address %03X\n", config.port_address); -#endif - - in_byte = inb(U14F_PRODUCT_ID(config.port_address)); - if (in_byte != US14F_PRODUCT_ID_0) { -#if (ULTRASTOR_DEBUG & UD_DETECT) -# ifdef PORT_OVERRIDE - printk("US14F: detect: wrong product ID 0 - %02X\n", in_byte); -# else - printk("US14F: detect: no adapter at port %03X\n", config.port_address); -# endif -#endif -#ifdef PORT_OVERRIDE - goto out_release_port; -#else - release_region(config.port_address, 0x0c); - continue; -#endif - } - in_byte = inb(U14F_PRODUCT_ID(config.port_address) + 1); - /* Only upper nibble is significant for Product ID 1 */ - if ((in_byte & 0xF0) != US14F_PRODUCT_ID_1) { -#if (ULTRASTOR_DEBUG & UD_DETECT) -# ifdef PORT_OVERRIDE - printk("US14F: detect: wrong product ID 1 - %02X\n", in_byte); -# else - printk("US14F: detect: no adapter at port %03X\n", config.port_address); -# endif -#endif -#ifdef PORT_OVERRIDE - goto out_release_port; -#else - release_region(config.port_address, 0x0c); - continue; -#endif - } - version_byte = in_byte; -#ifndef PORT_OVERRIDE - break; - } - if (i == ARRAY_SIZE(ultrastor_ports_14f)) { -# if (ULTRASTOR_DEBUG & UD_DETECT) - printk("US14F: detect: no port address found!\n"); -# endif - /* all ports probed already released - we can just go straight out */ - return FALSE; - } -#endif - -#if (ULTRASTOR_DEBUG & UD_DETECT) - printk("US14F: detect: adapter found at port address %03X\n", - config.port_address); -#endif - - /* Set local doorbell mask to disallow bus reset unless - ultrastor_bus_reset is true. */ - outb(ultrastor_bus_reset ? 0xc2 : 0x82, LCL_DOORBELL_MASK(config.port_address)); - - /* All above tests passed, must be the right thing. Get some useful - info. */ - - /* Register the I/O space that we use */ - - *(char *)&config_1 = inb(CONFIG(config.port_address + 0)); - *(char *)&config_2 = inb(CONFIG(config.port_address + 1)); - config.bios_segment = bios_segment_table[config_1.bios_segment]; - config.doorbell_address = config.port_address; - config.ogm_address = config.port_address + 0x8; - config.icm_address = config.port_address + 0xC; - config.interrupt = interrupt_table_14f[config_1.interrupt]; - config.ha_scsi_id = config_2.ha_scsi_id; - config.heads = mapping_table[config_2.mapping_mode].heads; - config.sectors = mapping_table[config_2.mapping_mode].sectors; - config.bios_drive_number = config_2.bios_drive_number; - config.subversion = (version_byte & 0x0F); - if (config.subversion == U34F) - config.dma_channel = 0; - else - config.dma_channel = dma_channel_table_14f[config_1.dma_channel]; - - if (!config.bios_segment) { -#if (ULTRASTOR_DEBUG & UD_DETECT) - printk("US14F: detect: not detected.\n"); -#endif - goto out_release_port; - } - - /* Final consistency check, verify previous info. */ - if (config.subversion != U34F) - if (!config.dma_channel || !(config_2.tfr_port & 0x2)) { -#if (ULTRASTOR_DEBUG & UD_DETECT) - printk("US14F: detect: consistency check failed\n"); -#endif - goto out_release_port; - } - - /* If we were TRULY paranoid, we could issue a host adapter inquiry - command here and verify the data returned. But frankly, I'm - exhausted! */ - - /* Finally! Now I'm satisfied... */ -#if (ULTRASTOR_DEBUG & UD_DETECT) - printk("US14F: detect: detect succeeded\n" - " Port address: %03X\n" - " BIOS segment: %05X\n" - " Interrupt: %u\n" - " DMA channel: %u\n" - " H/A SCSI ID: %u\n" - " Subversion: %u\n", - config.port_address, config.bios_segment, config.interrupt, - config.dma_channel, config.ha_scsi_id, config.subversion); -#endif - tpnt->this_id = config.ha_scsi_id; - tpnt->unchecked_isa_dma = (config.subversion != U34F); - -#if ULTRASTOR_MAX_CMDS > 1 - config.mscp_free = ~0; -#endif - - /* - * Brrr, &config.mscp[0].SCint->host) it is something magical.... - * XXX and FIXME - */ - if (request_irq(config.interrupt, do_ultrastor_interrupt, 0, "Ultrastor", &config.mscp[0].SCint->device->host)) { - printk("Unable to allocate IRQ%u for UltraStor controller.\n", - config.interrupt); - goto out_release_port; - } - if (config.dma_channel && request_dma(config.dma_channel,"Ultrastor")) { - printk("Unable to allocate DMA channel %u for UltraStor controller.\n", - config.dma_channel); - free_irq(config.interrupt, NULL); - goto out_release_port; - } - tpnt->sg_tablesize = ULTRASTOR_14F_MAX_SG; - printk("UltraStor driver version" VERSION ". Using %d SG lists.\n", - ULTRASTOR_14F_MAX_SG); - - return TRUE; -out_release_port: - release_region(config.port_address, 0x0c); - return FALSE; -} - -static int ultrastor_24f_detect(struct scsi_host_template * tpnt) -{ - int i; - struct Scsi_Host * shpnt = NULL; - -#if (ULTRASTOR_DEBUG & UD_DETECT) - printk("US24F: detect"); -#endif - - /* probe each EISA slot at slot address C80 */ - for (i = 1; i < 15; i++) - { - unsigned char config_1, config_2; - unsigned short addr = (i << 12) | ULTRASTOR_24F_PORT; - - if (inb(addr) != US24F_PRODUCT_ID_0 && - inb(addr+1) != US24F_PRODUCT_ID_1 && - inb(addr+2) != US24F_PRODUCT_ID_2) - continue; - - config.revision = inb(addr+3); - config.slot = i; - if (! (inb(addr+4) & 1)) - { -#if (ULTRASTOR_DEBUG & UD_DETECT) - printk("U24F: found disabled card in slot %u\n", i); -#endif - continue; - } -#if (ULTRASTOR_DEBUG & UD_DETECT) - printk("U24F: found card in slot %u\n", i); -#endif - config_1 = inb(addr + 5); - config.bios_segment = bios_segment_table[config_1 & 7]; - switch(config_1 >> 4) - { - case 1: - config.interrupt = 15; - break; - case 2: - config.interrupt = 14; - break; - case 4: - config.interrupt = 11; - break; - case 8: - config.interrupt = 10; - break; - default: - printk("U24F: invalid IRQ\n"); - return FALSE; - } - - /* BIOS addr set */ - /* base port set */ - config.port_address = addr; - config.doorbell_address = addr + 12; - config.ogm_address = addr + 0x17; - config.icm_address = addr + 0x1C; - config_2 = inb(addr + 7); - config.ha_scsi_id = config_2 & 7; - config.heads = mapping_table[(config_2 >> 3) & 3].heads; - config.sectors = mapping_table[(config_2 >> 3) & 3].sectors; -#if (ULTRASTOR_DEBUG & UD_DETECT) - printk("US24F: detect: detect succeeded\n" - " Port address: %03X\n" - " BIOS segment: %05X\n" - " Interrupt: %u\n" - " H/A SCSI ID: %u\n", - config.port_address, config.bios_segment, - config.interrupt, config.ha_scsi_id); -#endif - tpnt->this_id = config.ha_scsi_id; - tpnt->unchecked_isa_dma = 0; - tpnt->sg_tablesize = ULTRASTOR_24F_MAX_SG; - - shpnt = scsi_register(tpnt, 0); - if (!shpnt) { - printk(KERN_WARNING "(ultrastor:) Could not register scsi device. Aborting registration.\n"); - free_irq(config.interrupt, do_ultrastor_interrupt); - return FALSE; - } - - if (request_irq(config.interrupt, do_ultrastor_interrupt, 0, "Ultrastor", shpnt)) - { - printk("Unable to allocate IRQ%u for UltraStor controller.\n", - config.interrupt); - return FALSE; - } - - shpnt->irq = config.interrupt; - shpnt->dma_channel = config.dma_channel; - shpnt->io_port = config.port_address; - -#if ULTRASTOR_MAX_CMDS > 1 - config.mscp_free = ~0; -#endif - /* Mark ICM and OGM free */ - outb(0, addr + 0x16); - outb(0, addr + 0x1B); - - /* Set local doorbell mask to disallow bus reset unless - ultrastor_bus_reset is true. */ - outb(ultrastor_bus_reset ? 0xc2 : 0x82, LCL_DOORBELL_MASK(addr+12)); - outb(0x02, SYS_DOORBELL_MASK(addr+12)); - printk("UltraStor driver version " VERSION ". Using %d SG lists.\n", - tpnt->sg_tablesize); - return TRUE; - } - return FALSE; -} - -static int ultrastor_detect(struct scsi_host_template * tpnt) -{ - tpnt->proc_name = "ultrastor"; - return ultrastor_14f_detect(tpnt) || ultrastor_24f_detect(tpnt); -} - -static int ultrastor_release(struct Scsi_Host *shost) -{ - if (shost->irq) - free_irq(shost->irq, NULL); - if (shost->dma_channel != 0xff) - free_dma(shost->dma_channel); - if (shost->io_port && shost->n_io_port) - release_region(shost->io_port, shost->n_io_port); - scsi_unregister(shost); - return 0; -} - -static const char *ultrastor_info(struct Scsi_Host * shpnt) -{ - static char buf[64]; - - if (config.slot) - sprintf(buf, "UltraStor 24F SCSI @ Slot %u IRQ%u", - config.slot, config.interrupt); - else if (config.subversion) - sprintf(buf, "UltraStor 34F SCSI @ Port %03X BIOS %05X IRQ%u", - config.port_address, (int)config.bios_segment, - config.interrupt); - else - sprintf(buf, "UltraStor 14F SCSI @ Port %03X BIOS %05X IRQ%u DMA%u", - config.port_address, (int)config.bios_segment, - config.interrupt, config.dma_channel); - return buf; -} - -static inline void build_sg_list(struct mscp *mscp, struct scsi_cmnd *SCpnt) -{ - struct scatterlist *sg; - long transfer_length = 0; - int i, max; - - max = scsi_sg_count(SCpnt); - scsi_for_each_sg(SCpnt, sg, max, i) { - mscp->sglist[i].address = isa_page_to_bus(sg_page(sg)) + sg->offset; - mscp->sglist[i].num_bytes = sg->length; - transfer_length += sg->length; - } - mscp->number_of_sg_list = max; - mscp->transfer_data = isa_virt_to_bus(mscp->sglist); - /* ??? May not be necessary. Docs are unclear as to whether transfer - length field is ignored or whether it should be set to the total - number of bytes of the transfer. */ - mscp->transfer_data_length = transfer_length; -} - -static int ultrastor_queuecommand_lck(struct scsi_cmnd *SCpnt, - void (*done) (struct scsi_cmnd *)) -{ - struct mscp *my_mscp; -#if ULTRASTOR_MAX_CMDS > 1 - int mscp_index; -#endif - unsigned int status; - - /* Next test is for debugging; "can't happen" */ - if ((config.mscp_free & ((1U << ULTRASTOR_MAX_CMDS) - 1)) == 0) - panic("ultrastor_queuecommand: no free MSCP\n"); - mscp_index = find_and_clear_bit_16(&config.mscp_free); - - /* Has the command been aborted? */ - if (xchgb(0xff, &config.aborted[mscp_index]) != 0) - { - status = DID_ABORT << 16; - goto aborted; - } - - my_mscp = &config.mscp[mscp_index]; - - *(unsigned char *)my_mscp = OP_SCSI | (DTD_SCSI << 3); - - /* Tape drives don't work properly if the cache is used. The SCSI - READ command for a tape doesn't have a block offset, and the adapter - incorrectly assumes that all reads from the tape read the same - blocks. Results will depend on read buffer size and other disk - activity. - - ??? Which other device types should never use the cache? */ - my_mscp->ca = SCpnt->device->type != TYPE_TAPE; - my_mscp->target_id = SCpnt->device->id; - my_mscp->ch_no = 0; - my_mscp->lun = SCpnt->device->lun; - if (scsi_sg_count(SCpnt)) { - /* Set scatter/gather flag in SCSI command packet */ - my_mscp->sg = TRUE; - build_sg_list(my_mscp, SCpnt); - } else { - /* Unset scatter/gather flag in SCSI command packet */ - my_mscp->sg = FALSE; - my_mscp->transfer_data = isa_virt_to_bus(scsi_sglist(SCpnt)); - my_mscp->transfer_data_length = scsi_bufflen(SCpnt); - } - my_mscp->command_link = 0; /*???*/ - my_mscp->scsi_command_link_id = 0; /*???*/ - my_mscp->length_of_sense_byte = SCSI_SENSE_BUFFERSIZE; - my_mscp->length_of_scsi_cdbs = SCpnt->cmd_len; - memcpy(my_mscp->scsi_cdbs, SCpnt->cmnd, my_mscp->length_of_scsi_cdbs); - my_mscp->adapter_status = 0; - my_mscp->target_status = 0; - my_mscp->sense_data = isa_virt_to_bus(&SCpnt->sense_buffer); - my_mscp->done = done; - my_mscp->SCint = SCpnt; - SCpnt->host_scribble = (unsigned char *)my_mscp; - - /* Find free OGM slot. On 24F, look for OGM status byte == 0. - On 14F and 34F, wait for local interrupt pending flag to clear. - - FIXME: now we are using new_eh we should punt here and let the - midlayer sort it out */ - -retry: - if (config.slot) - while (inb(config.ogm_address - 1) != 0 && config.aborted[mscp_index] == 0xff) - barrier(); - - /* else??? */ - - while ((inb(LCL_DOORBELL_INTR(config.doorbell_address)) & (config.slot ? 2 : 1)) && config.aborted[mscp_index] == 0xff) - barrier(); - - /* To avoid race conditions, keep the code to write to the adapter - atomic. This simplifies the abort code. Right now the - scsi mid layer has the host_lock already held - */ - - if (inb(LCL_DOORBELL_INTR(config.doorbell_address)) & (config.slot ? 2 : 1)) - goto retry; - - status = xchgb(0, &config.aborted[mscp_index]); - if (status != 0xff) { - -#if ULTRASTOR_DEBUG & (UD_COMMAND | UD_ABORT) - printk("USx4F: queuecommand: aborted\n"); -#if ULTRASTOR_MAX_CMDS > 1 - log_ultrastor_abort(&config, mscp_index); -#endif -#endif - status <<= 16; - - aborted: - set_bit(mscp_index, &config.mscp_free); - /* If the driver queues commands, call the done proc here. Otherwise - return an error. */ -#if ULTRASTOR_MAX_CMDS > 1 - SCpnt->result = status; - done(SCpnt); - return 0; -#else - return status; -#endif - } - - /* Store pointer in OGM address bytes */ - outl(isa_virt_to_bus(my_mscp), config.ogm_address); - - /* Issue OGM interrupt */ - if (config.slot) { - /* Write OGM command register on 24F */ - outb(1, config.ogm_address - 1); - outb(0x2, LCL_DOORBELL_INTR(config.doorbell_address)); - } else { - outb(0x1, LCL_DOORBELL_INTR(config.doorbell_address)); - } - -#if (ULTRASTOR_DEBUG & UD_COMMAND) - printk("USx4F: queuecommand: returning\n"); -#endif - - return 0; -} - -static DEF_SCSI_QCMD(ultrastor_queuecommand) - -/* This code must deal with 2 cases: - - 1. The command has not been written to the OGM. In this case, set - the abort flag and return. - - 2. The command has been written to the OGM and is stuck somewhere in - the adapter. - - 2a. On a 24F, ask the adapter to abort the command. It will interrupt - when it does. - - 2b. Call the command's done procedure. - - */ - -static int ultrastor_abort(struct scsi_cmnd *SCpnt) -{ -#if ULTRASTOR_DEBUG & UD_ABORT - char out[108]; - unsigned char icm_status = 0, ogm_status = 0; - unsigned int icm_addr = 0, ogm_addr = 0; -#endif - unsigned int mscp_index; - unsigned char old_aborted; - unsigned long flags; - void (*done)(struct scsi_cmnd *); - struct Scsi_Host *host = SCpnt->device->host; - - if(config.slot) - return FAILED; /* Do not attempt an abort for the 24f */ - - /* Simple consistency checking */ - if(!SCpnt->host_scribble) - return FAILED; - - mscp_index = ((struct mscp *)SCpnt->host_scribble) - config.mscp; - if (mscp_index >= ULTRASTOR_MAX_CMDS) - panic("Ux4F aborting invalid MSCP"); - -#if ULTRASTOR_DEBUG & UD_ABORT - if (config.slot) - { - int port0 = (config.slot << 12) | 0xc80; - int i; - unsigned long flags; - - spin_lock_irqsave(host->host_lock, flags); - strcpy(out, "OGM %d:%x ICM %d:%x ports: "); - for (i = 0; i < 16; i++) - { - unsigned char p = inb(port0 + i); - out[28 + i * 3] = "0123456789abcdef"[p >> 4]; - out[29 + i * 3] = "0123456789abcdef"[p & 15]; - out[30 + i * 3] = ' '; - } - out[28 + i * 3] = '\n'; - out[29 + i * 3] = 0; - ogm_status = inb(port0 + 22); - ogm_addr = (unsigned int)isa_bus_to_virt(inl(port0 + 23)); - icm_status = inb(port0 + 27); - icm_addr = (unsigned int)isa_bus_to_virt(inl(port0 + 28)); - spin_unlock_irqrestore(host->host_lock, flags); - } - - /* First check to see if an interrupt is pending. I suspect the SiS - chipset loses interrupts. (I also suspect is mangles data, but - one bug at a time... */ - if (config.slot ? inb(config.icm_address - 1) == 2 : - (inb(SYS_DOORBELL_INTR(config.doorbell_address)) & 1)) - { - printk("Ux4F: abort while completed command pending\n"); - - spin_lock_irqsave(host->host_lock, flags); - /* FIXME: Ewww... need to think about passing host around properly */ - ultrastor_interrupt(NULL); - spin_unlock_irqrestore(host->host_lock, flags); - return SUCCESS; - } -#endif - - old_aborted = xchgb(DID_ABORT, &config.aborted[mscp_index]); - - /* aborted == 0xff is the signal that queuecommand has not yet sent - the command. It will notice the new abort flag and fail. */ - if (old_aborted == 0xff) - return SUCCESS; - - /* On 24F, send an abort MSCP request. The adapter will interrupt - and the interrupt handler will call done. */ - if (config.slot && inb(config.ogm_address - 1) == 0) - { - unsigned long flags; - - spin_lock_irqsave(host->host_lock, flags); - outl(isa_virt_to_bus(&config.mscp[mscp_index]), config.ogm_address); - udelay(8); - outb(0x80, config.ogm_address - 1); - outb(0x2, LCL_DOORBELL_INTR(config.doorbell_address)); -#if ULTRASTOR_DEBUG & UD_ABORT - log_ultrastor_abort(&config, mscp_index); - printk(out, ogm_status, ogm_addr, icm_status, icm_addr); -#endif - spin_unlock_irqrestore(host->host_lock, flags); - /* FIXME: add a wait for the abort to complete */ - return SUCCESS; - } - -#if ULTRASTOR_DEBUG & UD_ABORT - log_ultrastor_abort(&config, mscp_index); -#endif - - /* Can't request a graceful abort. Either this is not a 24F or - the OGM is busy. Don't free the command -- the adapter might - still be using it. Setting SCint = 0 causes the interrupt - handler to ignore the command. */ - - /* FIXME - devices that implement soft resets will still be running - the command after a bus reset. We would probably rather leave - the command in the queue. The upper level code will automatically - leave the command in the active state instead of requeueing it. ERY */ - -#if ULTRASTOR_DEBUG & UD_ABORT - if (config.mscp[mscp_index].SCint != SCpnt) - printk("abort: command mismatch, %p != %p\n", - config.mscp[mscp_index].SCint, SCpnt); -#endif - if (config.mscp[mscp_index].SCint == NULL) - return FAILED; - - if (config.mscp[mscp_index].SCint != SCpnt) panic("Bad abort"); - config.mscp[mscp_index].SCint = NULL; - done = config.mscp[mscp_index].done; - config.mscp[mscp_index].done = NULL; - SCpnt->result = DID_ABORT << 16; - - /* Take the host lock to guard against scsi layer re-entry */ - done(SCpnt); - - /* Need to set a timeout here in case command never completes. */ - return SUCCESS; -} - -static int ultrastor_host_reset(struct scsi_cmnd * SCpnt) -{ - unsigned long flags; - int i; - struct Scsi_Host *host = SCpnt->device->host; - -#if (ULTRASTOR_DEBUG & UD_RESET) - printk("US14F: reset: called\n"); -#endif - - if(config.slot) - return FAILED; - - spin_lock_irqsave(host->host_lock, flags); - /* Reset the adapter and SCSI bus. The SCSI bus reset can be - inhibited by clearing ultrastor_bus_reset before probe. */ - outb(0xc0, LCL_DOORBELL_INTR(config.doorbell_address)); - if (config.slot) - { - outb(0, config.ogm_address - 1); - outb(0, config.icm_address - 1); - } - -#if ULTRASTOR_MAX_CMDS == 1 - if (config.mscp_busy && config.mscp->done && config.mscp->SCint) - { - config.mscp->SCint->result = DID_RESET << 16; - config.mscp->done(config.mscp->SCint); - } - config.mscp->SCint = 0; -#else - for (i = 0; i < ULTRASTOR_MAX_CMDS; i++) - { - if (! (config.mscp_free & (1 << i)) && - config.mscp[i].done && config.mscp[i].SCint) - { - config.mscp[i].SCint->result = DID_RESET << 16; - config.mscp[i].done(config.mscp[i].SCint); - config.mscp[i].done = NULL; - } - config.mscp[i].SCint = NULL; - } -#endif - - /* FIXME - if the device implements soft resets, then the command - will still be running. ERY - - Even bigger deal with new_eh! - */ - - memset((unsigned char *)config.aborted, 0, sizeof config.aborted); -#if ULTRASTOR_MAX_CMDS == 1 - config.mscp_busy = 0; -#else - config.mscp_free = ~0; -#endif - - spin_unlock_irqrestore(host->host_lock, flags); - return SUCCESS; - -} - -int ultrastor_biosparam(struct scsi_device *sdev, struct block_device *bdev, - sector_t capacity, int * dkinfo) -{ - int size = capacity; - unsigned int s = config.heads * config.sectors; - - dkinfo[0] = config.heads; - dkinfo[1] = config.sectors; - dkinfo[2] = size / s; /* Ignore partial cylinders */ -#if 0 - if (dkinfo[2] > 1024) - dkinfo[2] = 1024; -#endif - return 0; -} - -static void ultrastor_interrupt(void *dev_id) -{ - unsigned int status; -#if ULTRASTOR_MAX_CMDS > 1 - unsigned int mscp_index; -#endif - struct mscp *mscp; - void (*done) (struct scsi_cmnd *); - struct scsi_cmnd *SCtmp; - -#if ULTRASTOR_MAX_CMDS == 1 - mscp = &config.mscp[0]; -#else - mscp = (struct mscp *)isa_bus_to_virt(inl(config.icm_address)); - mscp_index = mscp - config.mscp; - if (mscp_index >= ULTRASTOR_MAX_CMDS) { - printk("Ux4F interrupt: bad MSCP address %x\n", (unsigned int) mscp); - /* A command has been lost. Reset and report an error - for all commands. */ - ultrastor_host_reset(dev_id); - return; - } -#endif - - /* Clean ICM slot (set ICMINT bit to 0) */ - if (config.slot) { - unsigned char icm_status = inb(config.icm_address - 1); -#if ULTRASTOR_DEBUG & (UD_INTERRUPT|UD_ERROR|UD_ABORT) - if (icm_status != 1 && icm_status != 2) - printk("US24F: ICM status %x for MSCP %d (%x)\n", icm_status, - mscp_index, (unsigned int) mscp); -#endif - /* The manual says clear interrupt then write 0 to ICM status. - This seems backwards, but I'll do it anyway. --jfc */ - outb(2, SYS_DOORBELL_INTR(config.doorbell_address)); - outb(0, config.icm_address - 1); - if (icm_status == 4) { - printk("UltraStor abort command failed\n"); - return; - } - if (icm_status == 3) { - void (*done)(struct scsi_cmnd *) = mscp->done; - if (done) { - mscp->done = NULL; - mscp->SCint->result = DID_ABORT << 16; - done(mscp->SCint); - } - return; - } - } else { - outb(1, SYS_DOORBELL_INTR(config.doorbell_address)); - } - - SCtmp = mscp->SCint; - mscp->SCint = NULL; - - if (!SCtmp) - { -#if ULTRASTOR_DEBUG & (UD_ABORT|UD_INTERRUPT) - printk("MSCP %d (%x): no command\n", mscp_index, (unsigned int) mscp); -#endif -#if ULTRASTOR_MAX_CMDS == 1 - config.mscp_busy = FALSE; -#else - set_bit(mscp_index, &config.mscp_free); -#endif - config.aborted[mscp_index] = 0; - return; - } - - /* Save done locally and zero before calling. This is needed as - once we call done, we may get another command queued before this - interrupt service routine can return. */ - done = mscp->done; - mscp->done = NULL; - - /* Let the higher levels know that we're done */ - switch (mscp->adapter_status) - { - case 0: - status = DID_OK << 16; - break; - case 0x01: /* invalid command */ - case 0x02: /* invalid parameters */ - case 0x03: /* invalid data list */ - default: - status = DID_ERROR << 16; - break; - case 0x84: /* SCSI bus abort */ - status = DID_ABORT << 16; - break; - case 0x91: - status = DID_TIME_OUT << 16; - break; - } - - SCtmp->result = status | mscp->target_status; - - SCtmp->host_scribble = NULL; - - /* Free up mscp block for next command */ -#if ULTRASTOR_MAX_CMDS == 1 - config.mscp_busy = FALSE; -#else - set_bit(mscp_index, &config.mscp_free); -#endif - -#if ULTRASTOR_DEBUG & (UD_ABORT|UD_INTERRUPT) - if (config.aborted[mscp_index]) - printk("Ux4 interrupt: MSCP %d (%x) aborted = %d\n", - mscp_index, (unsigned int) mscp, config.aborted[mscp_index]); -#endif - config.aborted[mscp_index] = 0; - - if (done) - done(SCtmp); - else - printk("US14F: interrupt: unexpected interrupt\n"); - - if (config.slot ? inb(config.icm_address - 1) : - (inb(SYS_DOORBELL_INTR(config.doorbell_address)) & 1)) -#if (ULTRASTOR_DEBUG & UD_MULTI_CMD) - printk("Ux4F: multiple commands completed\n"); -#else - ; -#endif - -#if (ULTRASTOR_DEBUG & UD_INTERRUPT) - printk("USx4F: interrupt: returning\n"); -#endif -} - -static irqreturn_t do_ultrastor_interrupt(int irq, void *dev_id) -{ - unsigned long flags; - struct Scsi_Host *dev = dev_id; - - spin_lock_irqsave(dev->host_lock, flags); - ultrastor_interrupt(dev_id); - spin_unlock_irqrestore(dev->host_lock, flags); - return IRQ_HANDLED; -} - -MODULE_LICENSE("GPL"); - -static struct scsi_host_template driver_template = { - .name = "UltraStor 14F/24F/34F", - .detect = ultrastor_detect, - .release = ultrastor_release, - .info = ultrastor_info, - .queuecommand = ultrastor_queuecommand, - .eh_abort_handler = ultrastor_abort, - .eh_host_reset_handler = ultrastor_host_reset, - .bios_param = ultrastor_biosparam, - .can_queue = ULTRASTOR_MAX_CMDS, - .sg_tablesize = ULTRASTOR_14F_MAX_SG, - .cmd_per_lun = ULTRASTOR_MAX_CMDS_PER_LUN, - .unchecked_isa_dma = 1, - .use_clustering = ENABLE_CLUSTERING, -}; -#include "scsi_module.c" |