+++ /dev/null
-/*
- * Copyright (C) 1996-1999 Gadi Oxman <gadio@netvision.net.il>
- * Copyright (C) 2004-2005 Bartlomiej Zolnierkiewicz
- */
-
-/*
- * Emulation of a SCSI host adapter for IDE ATAPI devices.
- *
- * With this driver, one can use the Linux SCSI drivers instead of the
- * native IDE ATAPI drivers.
- *
- * Ver 0.1 Dec 3 96 Initial version.
- * Ver 0.2 Jan 26 97 Fixed bug in cleanup_module() and added emulation
- * of MODE_SENSE_6/MODE_SELECT_6 for cdroms. Thanks
- * to Janos Farkas for pointing this out.
- * Avoid using bitfields in structures for m68k.
- * Added Scatter/Gather and DMA support.
- * Ver 0.4 Dec 7 97 Add support for ATAPI PD/CD drives.
- * Use variable timeout for each command.
- * Ver 0.5 Jan 2 98 Fix previous PD/CD support.
- * Allow disabling of SCSI-6 to SCSI-10 transformation.
- * Ver 0.6 Jan 27 98 Allow disabling of SCSI command translation layer
- * for access through /dev/sg.
- * Fix MODE_SENSE_6/MODE_SELECT_6/INQUIRY translation.
- * Ver 0.7 Dec 04 98 Ignore commands where lun != 0 to avoid multiple
- * detection of devices with CONFIG_SCSI_MULTI_LUN
- * Ver 0.8 Feb 05 99 Optical media need translation too. Reverse 0.7.
- * Ver 0.9 Jul 04 99 Fix a bug in SG_SET_TRANSFORM.
- * Ver 0.91 Jun 10 02 Fix "off by one" error in transforms
- * Ver 0.92 Dec 31 02 Implement new SCSI mid level API
- */
-
-#define IDESCSI_VERSION "0.92"
-
-#include <linux/module.h>
-#include <linux/types.h>
-#include <linux/string.h>
-#include <linux/kernel.h>
-#include <linux/mm.h>
-#include <linux/ioport.h>
-#include <linux/blkdev.h>
-#include <linux/errno.h>
-#include <linux/slab.h>
-#include <linux/ide.h>
-#include <linux/scatterlist.h>
-#include <linux/delay.h>
-#include <linux/mutex.h>
-#include <linux/bitops.h>
-
-#include <asm/io.h>
-#include <asm/uaccess.h>
-
-#include <scsi/scsi.h>
-#include <scsi/scsi_cmnd.h>
-#include <scsi/scsi_device.h>
-#include <scsi/scsi_host.h>
-#include <scsi/scsi_tcq.h>
-#include <scsi/sg.h>
-
-#define IDESCSI_DEBUG_LOG 0
-
-#if IDESCSI_DEBUG_LOG
-#define debug_log(fmt, args...) \
- printk(KERN_INFO "ide-scsi: " fmt, ## args)
-#else
-#define debug_log(fmt, args...) do {} while (0)
-#endif
-
-/*
- * SCSI command transformation layer
- */
-#define IDESCSI_SG_TRANSFORM 1 /* /dev/sg transformation */
-
-/*
- * Log flags
- */
-#define IDESCSI_LOG_CMD 0 /* Log SCSI commands */
-
-typedef struct ide_scsi_obj {
- ide_drive_t *drive;
- ide_driver_t *driver;
- struct gendisk *disk;
- struct Scsi_Host *host;
-
- unsigned long transform; /* SCSI cmd translation layer */
- unsigned long log; /* log flags */
-} idescsi_scsi_t;
-
-static DEFINE_MUTEX(idescsi_ref_mutex);
-/* Set by module param to skip cd */
-static int idescsi_nocd;
-
-#define ide_scsi_g(disk) \
- container_of((disk)->private_data, struct ide_scsi_obj, driver)
-
-static struct ide_scsi_obj *ide_scsi_get(struct gendisk *disk)
-{
- struct ide_scsi_obj *scsi = NULL;
-
- mutex_lock(&idescsi_ref_mutex);
- scsi = ide_scsi_g(disk);
- if (scsi) {
- if (ide_device_get(scsi->drive))
- scsi = NULL;
- else
- scsi_host_get(scsi->host);
- }
- mutex_unlock(&idescsi_ref_mutex);
- return scsi;
-}
-
-static void ide_scsi_put(struct ide_scsi_obj *scsi)
-{
- ide_drive_t *drive = scsi->drive;
-
- mutex_lock(&idescsi_ref_mutex);
- scsi_host_put(scsi->host);
- ide_device_put(drive);
- mutex_unlock(&idescsi_ref_mutex);
-}
-
-static inline idescsi_scsi_t *scsihost_to_idescsi(struct Scsi_Host *host)
-{
- return (idescsi_scsi_t*) (&host[1]);
-}
-
-static inline idescsi_scsi_t *drive_to_idescsi(ide_drive_t *ide_drive)
-{
- return scsihost_to_idescsi(ide_drive->driver_data);
-}
-
-static void ide_scsi_hex_dump(u8 *data, int len)
-{
- print_hex_dump(KERN_CONT, "", DUMP_PREFIX_NONE, 16, 1, data, len, 0);
-}
-
-static int idescsi_end_request(ide_drive_t *, int, int);
-
-static void ide_scsi_callback(ide_drive_t *drive, int dsc)
-{
- idescsi_scsi_t *scsi = drive_to_idescsi(drive);
- struct ide_atapi_pc *pc = drive->pc;
-
- if (pc->flags & PC_FLAG_TIMEDOUT)
- debug_log("%s: got timed out packet %lu at %lu\n", __func__,
- pc->scsi_cmd->serial_number, jiffies);
- /* end this request now - scsi should retry it*/
- else if (test_bit(IDESCSI_LOG_CMD, &scsi->log))
- printk(KERN_INFO "Packet command completed, %d bytes"
- " transferred\n", pc->xferred);
-
- idescsi_end_request(drive, 1, 0);
-}
-
-static int idescsi_check_condition(ide_drive_t *drive,
- struct request *failed_cmd)
-{
- idescsi_scsi_t *scsi = drive_to_idescsi(drive);
- struct ide_atapi_pc *pc;
- struct request *rq;
- u8 *buf;
-
- /* stuff a sense request in front of our current request */
- pc = kzalloc(sizeof(struct ide_atapi_pc), GFP_ATOMIC);
- rq = blk_get_request(drive->queue, READ, GFP_ATOMIC);
- buf = kzalloc(SCSI_SENSE_BUFFERSIZE, GFP_ATOMIC);
- if (!pc || !rq || !buf) {
- kfree(buf);
- if (rq)
- blk_put_request(rq);
- kfree(pc);
- return -ENOMEM;
- }
- rq->special = (char *) pc;
- pc->rq = rq;
- pc->buf = buf;
- pc->c[0] = REQUEST_SENSE;
- pc->c[4] = pc->req_xfer = pc->buf_size = SCSI_SENSE_BUFFERSIZE;
- rq->cmd_type = REQ_TYPE_SENSE;
- rq->cmd_flags |= REQ_PREEMPT;
- pc->timeout = jiffies + WAIT_READY;
- /* NOTE! Save the failed packet command in "rq->buffer" */
- rq->buffer = (void *) failed_cmd->special;
- pc->scsi_cmd = ((struct ide_atapi_pc *) failed_cmd->special)->scsi_cmd;
- if (test_bit(IDESCSI_LOG_CMD, &scsi->log)) {
- printk ("ide-scsi: %s: queue cmd = ", drive->name);
- ide_scsi_hex_dump(pc->c, 6);
- }
- rq->rq_disk = scsi->disk;
- rq->ref_count++;
- memcpy(rq->cmd, pc->c, 12);
- ide_do_drive_cmd(drive, rq);
- return 0;
-}
-
-static ide_startstop_t
-idescsi_atapi_error(ide_drive_t *drive, struct request *rq, u8 stat, u8 err)
-{
- ide_hwif_t *hwif = drive->hwif;
-
- if (hwif->tp_ops->read_status(hwif) & (ATA_BUSY | ATA_DRQ))
- /* force an abort */
- hwif->tp_ops->exec_command(hwif, ATA_CMD_IDLEIMMEDIATE);
-
- rq->errors++;
-
- idescsi_end_request(drive, 0, 0);
-
- return ide_stopped;
-}
-
-static int idescsi_end_request (ide_drive_t *drive, int uptodate, int nrsecs)
-{
- idescsi_scsi_t *scsi = drive_to_idescsi(drive);
- struct request *rq = HWGROUP(drive)->rq;
- struct ide_atapi_pc *pc = (struct ide_atapi_pc *) rq->special;
- int log = test_bit(IDESCSI_LOG_CMD, &scsi->log);
- struct Scsi_Host *host;
- int errors = rq->errors;
- unsigned long flags;
-
- if (!blk_special_request(rq) && !blk_sense_request(rq)) {
- ide_end_request(drive, uptodate, nrsecs);
- return 0;
- }
- ide_end_drive_cmd (drive, 0, 0);
- if (blk_sense_request(rq)) {
- struct ide_atapi_pc *opc = (struct ide_atapi_pc *) rq->buffer;
- if (log) {
- printk ("ide-scsi: %s: wrap up check %lu, rst = ", drive->name, opc->scsi_cmd->serial_number);
- ide_scsi_hex_dump(pc->buf, 16);
- }
- memcpy((void *) opc->scsi_cmd->sense_buffer, pc->buf,
- SCSI_SENSE_BUFFERSIZE);
- kfree(pc->buf);
- kfree(pc);
- blk_put_request(rq);
- pc = opc;
- rq = pc->rq;
- pc->scsi_cmd->result = (CHECK_CONDITION << 1) |
- (((pc->flags & PC_FLAG_TIMEDOUT) ?
- DID_TIME_OUT :
- DID_OK) << 16);
- } else if (pc->flags & PC_FLAG_TIMEDOUT) {
- if (log)
- printk (KERN_WARNING "ide-scsi: %s: timed out for %lu\n",
- drive->name, pc->scsi_cmd->serial_number);
- pc->scsi_cmd->result = DID_TIME_OUT << 16;
- } else if (errors >= ERROR_MAX) {
- pc->scsi_cmd->result = DID_ERROR << 16;
- if (log)
- printk ("ide-scsi: %s: I/O error for %lu\n", drive->name, pc->scsi_cmd->serial_number);
- } else if (errors) {
- if (log)
- printk ("ide-scsi: %s: check condition for %lu\n", drive->name, pc->scsi_cmd->serial_number);
- if (!idescsi_check_condition(drive, rq))
- /* we started a request sense, so we'll be back, exit for now */
- return 0;
- pc->scsi_cmd->result = (CHECK_CONDITION << 1) | (DID_OK << 16);
- } else {
- pc->scsi_cmd->result = DID_OK << 16;
- }
- host = pc->scsi_cmd->device->host;
- spin_lock_irqsave(host->host_lock, flags);
- pc->done(pc->scsi_cmd);
- spin_unlock_irqrestore(host->host_lock, flags);
- kfree(pc);
- blk_put_request(rq);
- drive->pc = NULL;
- return 0;
-}
-
-static inline int idescsi_set_direction(struct ide_atapi_pc *pc)
-{
- switch (pc->c[0]) {
- case READ_6: case READ_10: case READ_12:
- pc->flags &= ~PC_FLAG_WRITING;
- return 0;
- case WRITE_6: case WRITE_10: case WRITE_12:
- pc->flags |= PC_FLAG_WRITING;
- return 0;
- default:
- return 1;
- }
-}
-
-static int idescsi_map_sg(ide_drive_t *drive, struct ide_atapi_pc *pc)
-{
- ide_hwif_t *hwif = drive->hwif;
- struct scatterlist *sg, *scsi_sg;
- int segments;
-
- if (!pc->req_xfer || pc->req_xfer % 1024)
- return 1;
-
- if (idescsi_set_direction(pc))
- return 1;
-
- sg = hwif->sg_table;
- scsi_sg = scsi_sglist(pc->scsi_cmd);
- segments = scsi_sg_count(pc->scsi_cmd);
-
- if (segments > hwif->sg_max_nents)
- return 1;
-
- hwif->sg_nents = segments;
- memcpy(sg, scsi_sg, sizeof(*sg) * segments);
-
- return 0;
-}
-
-static ide_startstop_t idescsi_issue_pc(ide_drive_t *drive,
- struct ide_atapi_pc *pc)
-{
- /* Set the current packet command */
- drive->pc = pc;
-
- return ide_issue_pc(drive, ide_scsi_get_timeout(pc), ide_scsi_expiry);
-}
-
-/*
- * idescsi_do_request is our request handling function.
- */
-static ide_startstop_t idescsi_do_request (ide_drive_t *drive, struct request *rq, sector_t block)
-{
- debug_log("dev: %s, cmd: %x, errors: %d\n", rq->rq_disk->disk_name,
- rq->cmd[0], rq->errors);
- debug_log("sector: %ld, nr_sectors: %ld, current_nr_sectors: %d\n",
- rq->sector, rq->nr_sectors, rq->current_nr_sectors);
-
- if (blk_sense_request(rq) || blk_special_request(rq)) {
- struct ide_atapi_pc *pc = (struct ide_atapi_pc *)rq->special;
-
- if ((drive->dev_flags & IDE_DFLAG_USING_DMA) &&
- idescsi_map_sg(drive, pc) == 0)
- pc->flags |= PC_FLAG_DMA_OK;
-
- return idescsi_issue_pc(drive, pc);
- }
- blk_dump_rq_flags(rq, "ide-scsi: unsup command");
- idescsi_end_request (drive, 0, 0);
- return ide_stopped;
-}
-
-#ifdef CONFIG_IDE_PROC_FS
-static ide_proc_entry_t idescsi_proc[] = {
- { "capacity", S_IFREG|S_IRUGO, proc_ide_read_capacity, NULL },
- { NULL, 0, NULL, NULL }
-};
-
-#define ide_scsi_devset_get(name, field) \
-static int get_##name(ide_drive_t *drive) \
-{ \
- idescsi_scsi_t *scsi = drive_to_idescsi(drive); \
- return scsi->field; \
-}
-
-#define ide_scsi_devset_set(name, field) \
-static int set_##name(ide_drive_t *drive, int arg) \
-{ \
- idescsi_scsi_t *scsi = drive_to_idescsi(drive); \
- scsi->field = arg; \
- return 0; \
-}
-
-#define ide_scsi_devset_rw_field(_name, _field) \
-ide_scsi_devset_get(_name, _field); \
-ide_scsi_devset_set(_name, _field); \
-IDE_DEVSET(_name, DS_SYNC, get_##_name, set_##_name);
-
-ide_devset_rw_field(bios_cyl, bios_cyl);
-ide_devset_rw_field(bios_head, bios_head);
-ide_devset_rw_field(bios_sect, bios_sect);
-
-ide_scsi_devset_rw_field(transform, transform);
-ide_scsi_devset_rw_field(log, log);
-
-static const struct ide_proc_devset idescsi_settings[] = {
- IDE_PROC_DEVSET(bios_cyl, 0, 1023),
- IDE_PROC_DEVSET(bios_head, 0, 255),
- IDE_PROC_DEVSET(bios_sect, 0, 63),
- IDE_PROC_DEVSET(log, 0, 1),
- IDE_PROC_DEVSET(transform, 0, 3),
- { 0 },
-};
-
-static ide_proc_entry_t *ide_scsi_proc_entries(ide_drive_t *drive)
-{
- return idescsi_proc;
-}
-
-static const struct ide_proc_devset *ide_scsi_proc_devsets(ide_drive_t *drive)
-{
- return idescsi_settings;
-}
-#endif
-
-/*
- * Driver initialization.
- */
-static void idescsi_setup (ide_drive_t *drive, idescsi_scsi_t *scsi)
-{
- clear_bit(IDESCSI_SG_TRANSFORM, &scsi->transform);
-#if IDESCSI_DEBUG_LOG
- set_bit(IDESCSI_LOG_CMD, &scsi->log);
-#endif /* IDESCSI_DEBUG_LOG */
-
- drive->pc_callback = ide_scsi_callback;
- drive->pc_update_buffers = NULL;
- drive->pc_io_buffers = ide_io_buffers;
-
- ide_proc_register_driver(drive, scsi->driver);
-}
-
-static void ide_scsi_remove(ide_drive_t *drive)
-{
- struct Scsi_Host *scsihost = drive->driver_data;
- struct ide_scsi_obj *scsi = scsihost_to_idescsi(scsihost);
- struct gendisk *g = scsi->disk;
-
- scsi_remove_host(scsihost);
- ide_proc_unregister_driver(drive, scsi->driver);
-
- ide_unregister_region(g);
-
- drive->driver_data = NULL;
- g->private_data = NULL;
- put_disk(g);
-
- ide_scsi_put(scsi);
-
- drive->dev_flags &= ~IDE_DFLAG_SCSI;
-}
-
-static int ide_scsi_probe(ide_drive_t *);
-
-static ide_driver_t idescsi_driver = {
- .gen_driver = {
- .owner = THIS_MODULE,
- .name = "ide-scsi",
- .bus = &ide_bus_type,
- },
- .probe = ide_scsi_probe,
- .remove = ide_scsi_remove,
- .version = IDESCSI_VERSION,
- .do_request = idescsi_do_request,
- .end_request = idescsi_end_request,
- .error = idescsi_atapi_error,
-#ifdef CONFIG_IDE_PROC_FS
- .proc_entries = ide_scsi_proc_entries,
- .proc_devsets = ide_scsi_proc_devsets,
-#endif
-};
-
-static int idescsi_ide_open(struct block_device *bdev, fmode_t mode)
-{
- struct ide_scsi_obj *scsi = ide_scsi_get(bdev->bd_disk);
-
- if (!scsi)
- return -ENXIO;
-
- return 0;
-}
-
-static int idescsi_ide_release(struct gendisk *disk, fmode_t mode)
-{
- ide_scsi_put(ide_scsi_g(disk));
- return 0;
-}
-
-static int idescsi_ide_ioctl(struct block_device *bdev, fmode_t mode,
- unsigned int cmd, unsigned long arg)
-{
- struct ide_scsi_obj *scsi = ide_scsi_g(bdev->bd_disk);
- return generic_ide_ioctl(scsi->drive, bdev, cmd, arg);
-}
-
-static struct block_device_operations idescsi_ops = {
- .owner = THIS_MODULE,
- .open = idescsi_ide_open,
- .release = idescsi_ide_release,
- .locked_ioctl = idescsi_ide_ioctl,
-};
-
-static int idescsi_slave_configure(struct scsi_device * sdp)
-{
- /* Configure detected device */
- sdp->use_10_for_rw = 1;
- sdp->use_10_for_ms = 1;
- scsi_adjust_queue_depth(sdp, MSG_SIMPLE_TAG, sdp->host->cmd_per_lun);
- return 0;
-}
-
-static const char *idescsi_info (struct Scsi_Host *host)
-{
- return "SCSI host adapter emulation for IDE ATAPI devices";
-}
-
-static int idescsi_ioctl (struct scsi_device *dev, int cmd, void __user *arg)
-{
- idescsi_scsi_t *scsi = scsihost_to_idescsi(dev->host);
-
- if (cmd == SG_SET_TRANSFORM) {
- if (arg)
- set_bit(IDESCSI_SG_TRANSFORM, &scsi->transform);
- else
- clear_bit(IDESCSI_SG_TRANSFORM, &scsi->transform);
- return 0;
- } else if (cmd == SG_GET_TRANSFORM)
- return put_user(test_bit(IDESCSI_SG_TRANSFORM, &scsi->transform), (int __user *) arg);
- return -EINVAL;
-}
-
-static int idescsi_queue (struct scsi_cmnd *cmd,
- void (*done)(struct scsi_cmnd *))
-{
- struct Scsi_Host *host = cmd->device->host;
- idescsi_scsi_t *scsi = scsihost_to_idescsi(host);
- ide_drive_t *drive = scsi->drive;
- struct request *rq = NULL;
- struct ide_atapi_pc *pc = NULL;
- int write = cmd->sc_data_direction == DMA_TO_DEVICE;
-
- if (!drive) {
- scmd_printk (KERN_ERR, cmd, "drive not present\n");
- goto abort;
- }
- scsi = drive_to_idescsi(drive);
- pc = kmalloc(sizeof(struct ide_atapi_pc), GFP_ATOMIC);
- rq = blk_get_request(drive->queue, write, GFP_ATOMIC);
- if (rq == NULL || pc == NULL) {
- printk (KERN_ERR "ide-scsi: %s: out of memory\n", drive->name);
- goto abort;
- }
-
- memset (pc->c, 0, 12);
- pc->flags = 0;
- if (cmd->sc_data_direction == DMA_TO_DEVICE)
- pc->flags |= PC_FLAG_WRITING;
- pc->rq = rq;
- memcpy (pc->c, cmd->cmnd, cmd->cmd_len);
- pc->buf = NULL;
- pc->sg = scsi_sglist(cmd);
- pc->sg_cnt = scsi_sg_count(cmd);
- pc->b_count = 0;
- pc->req_xfer = pc->buf_size = scsi_bufflen(cmd);
- pc->scsi_cmd = cmd;
- pc->done = done;
- pc->timeout = jiffies + cmd->request->timeout;
-
- if (test_bit(IDESCSI_LOG_CMD, &scsi->log)) {
- printk ("ide-scsi: %s: que %lu, cmd = ", drive->name, cmd->serial_number);
- ide_scsi_hex_dump(cmd->cmnd, cmd->cmd_len);
- if (memcmp(pc->c, cmd->cmnd, cmd->cmd_len)) {
- printk ("ide-scsi: %s: que %lu, tsl = ", drive->name, cmd->serial_number);
- ide_scsi_hex_dump(pc->c, 12);
- }
- }
-
- rq->special = (char *) pc;
- rq->cmd_type = REQ_TYPE_SPECIAL;
- spin_unlock_irq(host->host_lock);
- rq->ref_count++;
- memcpy(rq->cmd, pc->c, 12);
- blk_execute_rq_nowait(drive->queue, scsi->disk, rq, 0, NULL);
- spin_lock_irq(host->host_lock);
- return 0;
-abort:
- kfree (pc);
- if (rq)
- blk_put_request(rq);
- cmd->result = DID_ERROR << 16;
- done(cmd);
- return 0;
-}
-
-static int idescsi_eh_abort (struct scsi_cmnd *cmd)
-{
- idescsi_scsi_t *scsi = scsihost_to_idescsi(cmd->device->host);
- ide_drive_t *drive = scsi->drive;
- ide_hwif_t *hwif;
- ide_hwgroup_t *hwgroup;
- int busy;
- int ret = FAILED;
-
- struct ide_atapi_pc *pc;
-
- /* In idescsi_eh_abort we try to gently pry our command from the ide subsystem */
-
- if (test_bit(IDESCSI_LOG_CMD, &scsi->log))
- printk (KERN_WARNING "ide-scsi: abort called for %lu\n", cmd->serial_number);
-
- if (!drive) {
- printk (KERN_WARNING "ide-scsi: Drive not set in idescsi_eh_abort\n");
- WARN_ON(1);
- goto no_drive;
- }
-
- hwif = drive->hwif;
- hwgroup = hwif->hwgroup;
-
- /* First give it some more time, how much is "right" is hard to say :-(
- FIXME - uses mdelay which causes latency? */
- busy = ide_wait_not_busy(hwif, 100);
- if (test_bit(IDESCSI_LOG_CMD, &scsi->log))
- printk (KERN_WARNING "ide-scsi: drive did%s become ready\n", busy?" not":"");
-
- spin_lock_irq(&hwgroup->lock);
-
- /* If there is no pc running we're done (our interrupt took care of it) */
- pc = drive->pc;
- if (pc == NULL) {
- ret = SUCCESS;
- goto ide_unlock;
- }
-
- /* It's somewhere in flight. Does ide subsystem agree? */
- if (pc->scsi_cmd->serial_number == cmd->serial_number && !busy &&
- elv_queue_empty(drive->queue) && HWGROUP(drive)->rq != pc->rq) {
- /*
- * FIXME - not sure this condition can ever occur
- */
- printk (KERN_ERR "ide-scsi: cmd aborted!\n");
-
- if (blk_sense_request(pc->rq))
- kfree(pc->buf);
- /* we need to call blk_put_request twice. */
- blk_put_request(pc->rq);
- blk_put_request(pc->rq);
- kfree(pc);
- drive->pc = NULL;
-
- ret = SUCCESS;
- }
-
-ide_unlock:
- spin_unlock_irq(&hwgroup->lock);
-no_drive:
- if (test_bit(IDESCSI_LOG_CMD, &scsi->log))
- printk (KERN_WARNING "ide-scsi: abort returns %s\n", ret == SUCCESS?"success":"failed");
-
- return ret;
-}
-
-static int idescsi_eh_reset (struct scsi_cmnd *cmd)
-{
- struct request *req;
- idescsi_scsi_t *scsi = scsihost_to_idescsi(cmd->device->host);
- ide_drive_t *drive = scsi->drive;
- ide_hwgroup_t *hwgroup;
- int ready = 0;
- int ret = SUCCESS;
-
- struct ide_atapi_pc *pc;
-
- /* In idescsi_eh_reset we forcefully remove the command from the ide subsystem and reset the device. */
-
- if (test_bit(IDESCSI_LOG_CMD, &scsi->log))
- printk (KERN_WARNING "ide-scsi: reset called for %lu\n", cmd->serial_number);
-
- if (!drive) {
- printk (KERN_WARNING "ide-scsi: Drive not set in idescsi_eh_reset\n");
- WARN_ON(1);
- return FAILED;
- }
-
- hwgroup = drive->hwif->hwgroup;
-
- spin_lock_irq(cmd->device->host->host_lock);
- spin_lock(&hwgroup->lock);
-
- pc = drive->pc;
- if (pc)
- req = pc->rq;
-
- if (pc == NULL || req != hwgroup->rq || hwgroup->handler == NULL) {
- printk (KERN_WARNING "ide-scsi: No active request in idescsi_eh_reset\n");
- spin_unlock(&hwgroup->lock);
- spin_unlock_irq(cmd->device->host->host_lock);
- return FAILED;
- }
-
- /* kill current request */
- if (__blk_end_request(req, -EIO, 0))
- BUG();
- if (blk_sense_request(req))
- kfree(pc->buf);
- kfree(pc);
- drive->pc = NULL;
- blk_put_request(req);
-
- /* now nuke the drive queue */
- while ((req = elv_next_request(drive->queue))) {
- if (__blk_end_request(req, -EIO, 0))
- BUG();
- }
-
- hwgroup->rq = NULL;
- hwgroup->handler = NULL;
- hwgroup->busy = 1; /* will set this to zero when ide reset finished */
- spin_unlock(&hwgroup->lock);
-
- ide_do_reset(drive);
-
- /* ide_do_reset starts a polling handler which restarts itself every 50ms until the reset finishes */
-
- do {
- spin_unlock_irq(cmd->device->host->host_lock);
- msleep(50);
- spin_lock_irq(cmd->device->host->host_lock);
- } while ( HWGROUP(drive)->handler );
-
- ready = drive_is_ready(drive);
- HWGROUP(drive)->busy--;
- if (!ready) {
- printk (KERN_ERR "ide-scsi: reset failed!\n");
- ret = FAILED;
- }
-
- spin_unlock_irq(cmd->device->host->host_lock);
- return ret;
-}
-
-static int idescsi_bios(struct scsi_device *sdev, struct block_device *bdev,
- sector_t capacity, int *parm)
-{
- idescsi_scsi_t *idescsi = scsihost_to_idescsi(sdev->host);
- ide_drive_t *drive = idescsi->drive;
-
- if (drive->bios_cyl && drive->bios_head && drive->bios_sect) {
- parm[0] = drive->bios_head;
- parm[1] = drive->bios_sect;
- parm[2] = drive->bios_cyl;
- }
- return 0;
-}
-
-static struct scsi_host_template idescsi_template = {
- .module = THIS_MODULE,
- .name = "idescsi",
- .info = idescsi_info,
- .slave_configure = idescsi_slave_configure,
- .ioctl = idescsi_ioctl,
- .queuecommand = idescsi_queue,
- .eh_abort_handler = idescsi_eh_abort,
- .eh_host_reset_handler = idescsi_eh_reset,
- .bios_param = idescsi_bios,
- .can_queue = 40,
- .this_id = -1,
- .sg_tablesize = 256,
- .cmd_per_lun = 5,
- .max_sectors = 128,
- .use_clustering = DISABLE_CLUSTERING,
- .emulated = 1,
- .proc_name = "ide-scsi",
-};
-
-static int ide_scsi_probe(ide_drive_t *drive)
-{
- idescsi_scsi_t *idescsi;
- struct Scsi_Host *host;
- struct gendisk *g;
- static int warned;
- int err = -ENOMEM;
- u16 last_lun;
-
- if (!warned && drive->media == ide_cdrom) {
- printk(KERN_WARNING "ide-scsi is deprecated for cd burning! Use ide-cd and give dev=/dev/hdX as device\n");
- warned = 1;
- }
-
- if (idescsi_nocd && drive->media == ide_cdrom)
- return -ENODEV;
-
- if (!strstr("ide-scsi", drive->driver_req) ||
- drive->media == ide_disk ||
- !(host = scsi_host_alloc(&idescsi_template,sizeof(idescsi_scsi_t))))
- return -ENODEV;
-
- drive->dev_flags |= IDE_DFLAG_SCSI;
-
- g = alloc_disk(1 << PARTN_BITS);
- if (!g)
- goto out_host_put;
-
- ide_init_disk(g, drive);
-
- host->max_id = 1;
-
- last_lun = drive->id[ATA_ID_LAST_LUN];
- if (last_lun)
- debug_log("%s: last_lun=%u\n", drive->name, last_lun);
-
- if ((last_lun & 7) != 7)
- host->max_lun = (last_lun & 7) + 1;
- else
- host->max_lun = 1;
-
- drive->driver_data = host;
- idescsi = scsihost_to_idescsi(host);
- idescsi->drive = drive;
- idescsi->driver = &idescsi_driver;
- idescsi->host = host;
- idescsi->disk = g;
- g->private_data = &idescsi->driver;
- err = 0;
- idescsi_setup(drive, idescsi);
- g->fops = &idescsi_ops;
- ide_register_region(g);
- err = scsi_add_host(host, &drive->gendev);
- if (!err) {
- scsi_scan_host(host);
- return 0;
- }
- /* fall through on error */
- ide_unregister_region(g);
- ide_proc_unregister_driver(drive, &idescsi_driver);
-
- put_disk(g);
-out_host_put:
- drive->dev_flags &= ~IDE_DFLAG_SCSI;
- scsi_host_put(host);
- return err;
-}
-
-static int __init init_idescsi_module(void)
-{
- return driver_register(&idescsi_driver.gen_driver);
-}
-
-static void __exit exit_idescsi_module(void)
-{
- driver_unregister(&idescsi_driver.gen_driver);
-}
-
-module_param(idescsi_nocd, int, 0600);
-MODULE_PARM_DESC(idescsi_nocd, "Disable handling of CD-ROMs so they may be driven by ide-cd");
-module_init(init_idescsi_module);
-module_exit(exit_idescsi_module);
-MODULE_LICENSE("GPL");
git://ftp.safe.ca / safe / jmp / linux-2.6 / commitdiff