2 * Copyright (C) 1996-1999 Gadi Oxman <gadio@netvision.net.il>
3 * Copyright (C) 2004-2005 Bartlomiej Zolnierkiewicz
7 * Emulation of a SCSI host adapter for IDE ATAPI devices.
9 * With this driver, one can use the Linux SCSI drivers instead of the
10 * native IDE ATAPI drivers.
12 * Ver 0.1 Dec 3 96 Initial version.
13 * Ver 0.2 Jan 26 97 Fixed bug in cleanup_module() and added emulation
14 * of MODE_SENSE_6/MODE_SELECT_6 for cdroms. Thanks
15 * to Janos Farkas for pointing this out.
16 * Avoid using bitfields in structures for m68k.
17 * Added Scatter/Gather and DMA support.
18 * Ver 0.4 Dec 7 97 Add support for ATAPI PD/CD drives.
19 * Use variable timeout for each command.
20 * Ver 0.5 Jan 2 98 Fix previous PD/CD support.
21 * Allow disabling of SCSI-6 to SCSI-10 transformation.
22 * Ver 0.6 Jan 27 98 Allow disabling of SCSI command translation layer
23 * for access through /dev/sg.
24 * Fix MODE_SENSE_6/MODE_SELECT_6/INQUIRY translation.
25 * Ver 0.7 Dec 04 98 Ignore commands where lun != 0 to avoid multiple
26 * detection of devices with CONFIG_SCSI_MULTI_LUN
27 * Ver 0.8 Feb 05 99 Optical media need translation too. Reverse 0.7.
28 * Ver 0.9 Jul 04 99 Fix a bug in SG_SET_TRANSFORM.
29 * Ver 0.91 Jun 10 02 Fix "off by one" error in transforms
30 * Ver 0.92 Dec 31 02 Implement new SCSI mid level API
33 #define IDESCSI_VERSION "0.92"
35 #include <linux/module.h>
36 #include <linux/types.h>
37 #include <linux/string.h>
38 #include <linux/kernel.h>
40 #include <linux/ioport.h>
41 #include <linux/blkdev.h>
42 #include <linux/errno.h>
43 #include <linux/slab.h>
44 #include <linux/ide.h>
45 #include <linux/scatterlist.h>
46 #include <linux/delay.h>
47 #include <linux/mutex.h>
48 #include <linux/bitops.h>
51 #include <asm/uaccess.h>
53 #include <scsi/scsi.h>
54 #include <scsi/scsi_cmnd.h>
55 #include <scsi/scsi_device.h>
56 #include <scsi/scsi_host.h>
57 #include <scsi/scsi_tcq.h>
60 #define IDESCSI_DEBUG_LOG 0
63 #define debug_log(fmt, args...) \
64 printk(KERN_INFO "ide-scsi: " fmt, ## args)
66 #define debug_log(fmt, args...) do {} while (0)
70 * SCSI command transformation layer
72 #define IDESCSI_SG_TRANSFORM 1 /* /dev/sg transformation */
77 #define IDESCSI_LOG_CMD 0 /* Log SCSI commands */
79 typedef struct ide_scsi_obj {
83 struct Scsi_Host *host;
85 struct ide_atapi_pc *pc; /* Current packet command */
86 unsigned long transform; /* SCSI cmd translation layer */
87 unsigned long log; /* log flags */
90 static DEFINE_MUTEX(idescsi_ref_mutex);
91 /* Set by module param to skip cd */
92 static int idescsi_nocd;
94 #define ide_scsi_g(disk) \
95 container_of((disk)->private_data, struct ide_scsi_obj, driver)
97 static struct ide_scsi_obj *ide_scsi_get(struct gendisk *disk)
99 struct ide_scsi_obj *scsi = NULL;
101 mutex_lock(&idescsi_ref_mutex);
102 scsi = ide_scsi_g(disk);
104 if (ide_device_get(scsi->drive))
107 scsi_host_get(scsi->host);
109 mutex_unlock(&idescsi_ref_mutex);
113 static void ide_scsi_put(struct ide_scsi_obj *scsi)
115 ide_drive_t *drive = scsi->drive;
117 mutex_lock(&idescsi_ref_mutex);
118 scsi_host_put(scsi->host);
119 ide_device_put(drive);
120 mutex_unlock(&idescsi_ref_mutex);
123 static inline idescsi_scsi_t *scsihost_to_idescsi(struct Scsi_Host *host)
125 return (idescsi_scsi_t*) (&host[1]);
128 static inline idescsi_scsi_t *drive_to_idescsi(ide_drive_t *ide_drive)
130 return scsihost_to_idescsi(ide_drive->driver_data);
133 static void ide_scsi_hex_dump(u8 *data, int len)
135 print_hex_dump(KERN_CONT, "", DUMP_PREFIX_NONE, 16, 1, data, len, 0);
138 static int idescsi_end_request(ide_drive_t *, int, int);
140 static void ide_scsi_callback(ide_drive_t *drive, int dsc)
142 idescsi_scsi_t *scsi = drive_to_idescsi(drive);
143 struct ide_atapi_pc *pc = scsi->pc;
145 if (pc->flags & PC_FLAG_TIMEDOUT)
146 debug_log("%s: got timed out packet %lu at %lu\n", __func__,
147 pc->scsi_cmd->serial_number, jiffies);
148 /* end this request now - scsi should retry it*/
149 else if (test_bit(IDESCSI_LOG_CMD, &scsi->log))
150 printk(KERN_INFO "Packet command completed, %d bytes"
151 " transferred\n", pc->xferred);
153 idescsi_end_request(drive, 1, 0);
156 static int idescsi_check_condition(ide_drive_t *drive,
157 struct request *failed_cmd)
159 idescsi_scsi_t *scsi = drive_to_idescsi(drive);
160 struct ide_atapi_pc *pc;
164 /* stuff a sense request in front of our current request */
165 pc = kzalloc(sizeof(struct ide_atapi_pc), GFP_ATOMIC);
166 rq = blk_get_request(drive->queue, READ, GFP_ATOMIC);
167 buf = kzalloc(SCSI_SENSE_BUFFERSIZE, GFP_ATOMIC);
168 if (!pc || !rq || !buf) {
175 rq->special = (char *) pc;
178 pc->c[0] = REQUEST_SENSE;
179 pc->c[4] = pc->req_xfer = pc->buf_size = SCSI_SENSE_BUFFERSIZE;
180 rq->cmd_type = REQ_TYPE_SENSE;
181 rq->cmd_flags |= REQ_PREEMPT;
182 pc->timeout = jiffies + WAIT_READY;
183 /* NOTE! Save the failed packet command in "rq->buffer" */
184 rq->buffer = (void *) failed_cmd->special;
185 pc->scsi_cmd = ((struct ide_atapi_pc *) failed_cmd->special)->scsi_cmd;
186 if (test_bit(IDESCSI_LOG_CMD, &scsi->log)) {
187 printk ("ide-scsi: %s: queue cmd = ", drive->name);
188 ide_scsi_hex_dump(pc->c, 6);
190 rq->rq_disk = scsi->disk;
192 memcpy(rq->cmd, pc->c, 12);
193 ide_do_drive_cmd(drive, rq);
197 static ide_startstop_t
198 idescsi_atapi_error(ide_drive_t *drive, struct request *rq, u8 stat, u8 err)
200 ide_hwif_t *hwif = drive->hwif;
202 if (hwif->tp_ops->read_status(hwif) & (ATA_BUSY | ATA_DRQ))
204 hwif->tp_ops->exec_command(hwif, ATA_CMD_IDLEIMMEDIATE);
208 idescsi_end_request(drive, 0, 0);
213 static int idescsi_end_request (ide_drive_t *drive, int uptodate, int nrsecs)
215 idescsi_scsi_t *scsi = drive_to_idescsi(drive);
216 struct request *rq = HWGROUP(drive)->rq;
217 struct ide_atapi_pc *pc = (struct ide_atapi_pc *) rq->special;
218 int log = test_bit(IDESCSI_LOG_CMD, &scsi->log);
219 struct Scsi_Host *host;
220 int errors = rq->errors;
223 if (!blk_special_request(rq) && !blk_sense_request(rq)) {
224 ide_end_request(drive, uptodate, nrsecs);
227 ide_end_drive_cmd (drive, 0, 0);
228 if (blk_sense_request(rq)) {
229 struct ide_atapi_pc *opc = (struct ide_atapi_pc *) rq->buffer;
231 printk ("ide-scsi: %s: wrap up check %lu, rst = ", drive->name, opc->scsi_cmd->serial_number);
232 ide_scsi_hex_dump(pc->buf, 16);
234 memcpy((void *) opc->scsi_cmd->sense_buffer, pc->buf,
235 SCSI_SENSE_BUFFERSIZE);
241 pc->scsi_cmd->result = (CHECK_CONDITION << 1) |
242 (((pc->flags & PC_FLAG_TIMEDOUT) ?
245 } else if (pc->flags & PC_FLAG_TIMEDOUT) {
247 printk (KERN_WARNING "ide-scsi: %s: timed out for %lu\n",
248 drive->name, pc->scsi_cmd->serial_number);
249 pc->scsi_cmd->result = DID_TIME_OUT << 16;
250 } else if (errors >= ERROR_MAX) {
251 pc->scsi_cmd->result = DID_ERROR << 16;
253 printk ("ide-scsi: %s: I/O error for %lu\n", drive->name, pc->scsi_cmd->serial_number);
256 printk ("ide-scsi: %s: check condition for %lu\n", drive->name, pc->scsi_cmd->serial_number);
257 if (!idescsi_check_condition(drive, rq))
258 /* we started a request sense, so we'll be back, exit for now */
260 pc->scsi_cmd->result = (CHECK_CONDITION << 1) | (DID_OK << 16);
262 pc->scsi_cmd->result = DID_OK << 16;
264 host = pc->scsi_cmd->device->host;
265 spin_lock_irqsave(host->host_lock, flags);
266 pc->done(pc->scsi_cmd);
267 spin_unlock_irqrestore(host->host_lock, flags);
274 static inline unsigned long get_timeout(struct ide_atapi_pc *pc)
276 return max_t(unsigned long, WAIT_CMD, pc->timeout - jiffies);
279 static int idescsi_expiry(ide_drive_t *drive)
281 idescsi_scsi_t *scsi = drive_to_idescsi(drive);
282 struct ide_atapi_pc *pc = scsi->pc;
284 debug_log("%s called for %lu at %lu\n", __func__,
285 pc->scsi_cmd->serial_number, jiffies);
287 pc->flags |= PC_FLAG_TIMEDOUT;
289 return 0; /* we do not want the ide subsystem to retry */
293 * Our interrupt handler.
295 static ide_startstop_t idescsi_pc_intr (ide_drive_t *drive)
297 idescsi_scsi_t *scsi = drive_to_idescsi(drive);
298 struct ide_atapi_pc *pc = scsi->pc;
300 return ide_pc_intr(drive, pc, idescsi_pc_intr, get_timeout(pc),
301 idescsi_expiry, NULL, NULL, ide_io_buffers);
304 static ide_startstop_t idescsi_transfer_pc(ide_drive_t *drive)
306 idescsi_scsi_t *scsi = drive_to_idescsi(drive);
308 return ide_transfer_pc(drive, scsi->pc, idescsi_pc_intr,
309 get_timeout(scsi->pc), idescsi_expiry);
312 static inline int idescsi_set_direction(struct ide_atapi_pc *pc)
315 case READ_6: case READ_10: case READ_12:
316 pc->flags &= ~PC_FLAG_WRITING;
318 case WRITE_6: case WRITE_10: case WRITE_12:
319 pc->flags |= PC_FLAG_WRITING;
326 static int idescsi_map_sg(ide_drive_t *drive, struct ide_atapi_pc *pc)
328 ide_hwif_t *hwif = drive->hwif;
329 struct scatterlist *sg, *scsi_sg;
332 if (!pc->req_xfer || pc->req_xfer % 1024)
335 if (idescsi_set_direction(pc))
339 scsi_sg = scsi_sglist(pc->scsi_cmd);
340 segments = scsi_sg_count(pc->scsi_cmd);
342 if (segments > hwif->sg_max_nents)
345 hwif->sg_nents = segments;
346 memcpy(sg, scsi_sg, sizeof(*sg) * segments);
351 static ide_startstop_t idescsi_issue_pc(ide_drive_t *drive,
352 struct ide_atapi_pc *pc)
354 idescsi_scsi_t *scsi = drive_to_idescsi(drive);
356 /* Set the current packet command */
359 return ide_issue_pc(drive, pc, idescsi_transfer_pc,
360 get_timeout(pc), idescsi_expiry);
364 * idescsi_do_request is our request handling function.
366 static ide_startstop_t idescsi_do_request (ide_drive_t *drive, struct request *rq, sector_t block)
368 debug_log("dev: %s, cmd: %x, errors: %d\n", rq->rq_disk->disk_name,
369 rq->cmd[0], rq->errors);
370 debug_log("sector: %ld, nr_sectors: %ld, current_nr_sectors: %d\n",
371 rq->sector, rq->nr_sectors, rq->current_nr_sectors);
373 if (blk_sense_request(rq) || blk_special_request(rq)) {
374 struct ide_atapi_pc *pc = (struct ide_atapi_pc *)rq->special;
376 if (drive->using_dma && !idescsi_map_sg(drive, pc))
377 pc->flags |= PC_FLAG_DMA_OK;
379 return idescsi_issue_pc(drive, pc);
381 blk_dump_rq_flags(rq, "ide-scsi: unsup command");
382 idescsi_end_request (drive, 0, 0);
386 #ifdef CONFIG_IDE_PROC_FS
387 #define ide_scsi_devset_get(name, field) \
388 static int get_##name(ide_drive_t *drive) \
390 idescsi_scsi_t *scsi = drive_to_idescsi(drive); \
391 return scsi->field; \
394 #define ide_scsi_devset_set(name, field) \
395 static int set_##name(ide_drive_t *drive, int arg) \
397 idescsi_scsi_t *scsi = drive_to_idescsi(drive); \
402 #define ide_scsi_devset_rw_field(_name, _field) \
403 ide_scsi_devset_get(_name, _field); \
404 ide_scsi_devset_set(_name, _field); \
405 IDE_DEVSET(_name, DS_SYNC, get_##_name, set_##_name);
407 ide_devset_rw_field(bios_cyl, bios_cyl);
408 ide_devset_rw_field(bios_head, bios_head);
409 ide_devset_rw_field(bios_sect, bios_sect);
411 ide_scsi_devset_rw_field(transform, transform);
412 ide_scsi_devset_rw_field(log, log);
414 static const struct ide_proc_devset idescsi_settings[] = {
415 IDE_PROC_DEVSET(bios_cyl, 0, 1023),
416 IDE_PROC_DEVSET(bios_head, 0, 255),
417 IDE_PROC_DEVSET(bios_sect, 0, 63),
418 IDE_PROC_DEVSET(log, 0, 1),
419 IDE_PROC_DEVSET(transform, 0, 3),
425 * Driver initialization.
427 static void idescsi_setup (ide_drive_t *drive, idescsi_scsi_t *scsi)
429 if ((drive->id[ATA_ID_CONFIG] & 0x0060) == 0x20)
430 set_bit(IDE_AFLAG_DRQ_INTERRUPT, &drive->atapi_flags);
431 clear_bit(IDESCSI_SG_TRANSFORM, &scsi->transform);
432 #if IDESCSI_DEBUG_LOG
433 set_bit(IDESCSI_LOG_CMD, &scsi->log);
434 #endif /* IDESCSI_DEBUG_LOG */
436 drive->pc_callback = ide_scsi_callback;
438 ide_proc_register_driver(drive, scsi->driver);
441 static void ide_scsi_remove(ide_drive_t *drive)
443 struct Scsi_Host *scsihost = drive->driver_data;
444 struct ide_scsi_obj *scsi = scsihost_to_idescsi(scsihost);
445 struct gendisk *g = scsi->disk;
447 scsi_remove_host(scsihost);
448 ide_proc_unregister_driver(drive, scsi->driver);
450 ide_unregister_region(g);
452 drive->driver_data = NULL;
453 g->private_data = NULL;
461 static int ide_scsi_probe(ide_drive_t *);
463 #ifdef CONFIG_IDE_PROC_FS
464 static ide_proc_entry_t idescsi_proc[] = {
465 { "capacity", S_IFREG|S_IRUGO, proc_ide_read_capacity, NULL },
466 { NULL, 0, NULL, NULL }
470 static ide_driver_t idescsi_driver = {
472 .owner = THIS_MODULE,
474 .bus = &ide_bus_type,
476 .probe = ide_scsi_probe,
477 .remove = ide_scsi_remove,
478 .version = IDESCSI_VERSION,
480 .do_request = idescsi_do_request,
481 .end_request = idescsi_end_request,
482 .error = idescsi_atapi_error,
483 #ifdef CONFIG_IDE_PROC_FS
484 .proc = idescsi_proc,
485 .settings = idescsi_settings,
489 static int idescsi_ide_open(struct inode *inode, struct file *filp)
491 struct gendisk *disk = inode->i_bdev->bd_disk;
492 struct ide_scsi_obj *scsi;
494 if (!(scsi = ide_scsi_get(disk)))
500 static int idescsi_ide_release(struct inode *inode, struct file *filp)
502 struct gendisk *disk = inode->i_bdev->bd_disk;
503 struct ide_scsi_obj *scsi = ide_scsi_g(disk);
510 static int idescsi_ide_ioctl(struct inode *inode, struct file *file,
511 unsigned int cmd, unsigned long arg)
513 struct block_device *bdev = inode->i_bdev;
514 struct ide_scsi_obj *scsi = ide_scsi_g(bdev->bd_disk);
515 return generic_ide_ioctl(scsi->drive, file, bdev, cmd, arg);
518 static struct block_device_operations idescsi_ops = {
519 .owner = THIS_MODULE,
520 .open = idescsi_ide_open,
521 .release = idescsi_ide_release,
522 .ioctl = idescsi_ide_ioctl,
525 static int idescsi_slave_configure(struct scsi_device * sdp)
527 /* Configure detected device */
528 sdp->use_10_for_rw = 1;
529 sdp->use_10_for_ms = 1;
530 scsi_adjust_queue_depth(sdp, MSG_SIMPLE_TAG, sdp->host->cmd_per_lun);
534 static const char *idescsi_info (struct Scsi_Host *host)
536 return "SCSI host adapter emulation for IDE ATAPI devices";
539 static int idescsi_ioctl (struct scsi_device *dev, int cmd, void __user *arg)
541 idescsi_scsi_t *scsi = scsihost_to_idescsi(dev->host);
543 if (cmd == SG_SET_TRANSFORM) {
545 set_bit(IDESCSI_SG_TRANSFORM, &scsi->transform);
547 clear_bit(IDESCSI_SG_TRANSFORM, &scsi->transform);
549 } else if (cmd == SG_GET_TRANSFORM)
550 return put_user(test_bit(IDESCSI_SG_TRANSFORM, &scsi->transform), (int __user *) arg);
554 static int idescsi_queue (struct scsi_cmnd *cmd,
555 void (*done)(struct scsi_cmnd *))
557 struct Scsi_Host *host = cmd->device->host;
558 idescsi_scsi_t *scsi = scsihost_to_idescsi(host);
559 ide_drive_t *drive = scsi->drive;
560 struct request *rq = NULL;
561 struct ide_atapi_pc *pc = NULL;
562 int write = cmd->sc_data_direction == DMA_TO_DEVICE;
565 scmd_printk (KERN_ERR, cmd, "drive not present\n");
568 scsi = drive_to_idescsi(drive);
569 pc = kmalloc(sizeof(struct ide_atapi_pc), GFP_ATOMIC);
570 rq = blk_get_request(drive->queue, write, GFP_ATOMIC);
571 if (rq == NULL || pc == NULL) {
572 printk (KERN_ERR "ide-scsi: %s: out of memory\n", drive->name);
576 memset (pc->c, 0, 12);
578 if (cmd->sc_data_direction == DMA_TO_DEVICE)
579 pc->flags |= PC_FLAG_WRITING;
581 memcpy (pc->c, cmd->cmnd, cmd->cmd_len);
583 pc->sg = scsi_sglist(cmd);
584 pc->sg_cnt = scsi_sg_count(cmd);
586 pc->req_xfer = pc->buf_size = scsi_bufflen(cmd);
589 pc->timeout = jiffies + cmd->request->timeout;
591 if (test_bit(IDESCSI_LOG_CMD, &scsi->log)) {
592 printk ("ide-scsi: %s: que %lu, cmd = ", drive->name, cmd->serial_number);
593 ide_scsi_hex_dump(cmd->cmnd, cmd->cmd_len);
594 if (memcmp(pc->c, cmd->cmnd, cmd->cmd_len)) {
595 printk ("ide-scsi: %s: que %lu, tsl = ", drive->name, cmd->serial_number);
596 ide_scsi_hex_dump(pc->c, 12);
600 rq->special = (char *) pc;
601 rq->cmd_type = REQ_TYPE_SPECIAL;
602 spin_unlock_irq(host->host_lock);
604 memcpy(rq->cmd, pc->c, 12);
605 blk_execute_rq_nowait(drive->queue, scsi->disk, rq, 0, NULL);
606 spin_lock_irq(host->host_lock);
612 cmd->result = DID_ERROR << 16;
617 static int idescsi_eh_abort (struct scsi_cmnd *cmd)
619 idescsi_scsi_t *scsi = scsihost_to_idescsi(cmd->device->host);
620 ide_drive_t *drive = scsi->drive;
624 /* In idescsi_eh_abort we try to gently pry our command from the ide subsystem */
626 if (test_bit(IDESCSI_LOG_CMD, &scsi->log))
627 printk (KERN_WARNING "ide-scsi: abort called for %lu\n", cmd->serial_number);
630 printk (KERN_WARNING "ide-scsi: Drive not set in idescsi_eh_abort\n");
635 /* First give it some more time, how much is "right" is hard to say :-( */
637 busy = ide_wait_not_busy(HWIF(drive), 100); /* FIXME - uses mdelay which causes latency? */
638 if (test_bit(IDESCSI_LOG_CMD, &scsi->log))
639 printk (KERN_WARNING "ide-scsi: drive did%s become ready\n", busy?" not":"");
641 spin_lock_irq(&ide_lock);
643 /* If there is no pc running we're done (our interrupt took care of it) */
649 /* It's somewhere in flight. Does ide subsystem agree? */
650 if (scsi->pc->scsi_cmd->serial_number == cmd->serial_number && !busy &&
651 elv_queue_empty(drive->queue) && HWGROUP(drive)->rq != scsi->pc->rq) {
653 * FIXME - not sure this condition can ever occur
655 printk (KERN_ERR "ide-scsi: cmd aborted!\n");
657 if (blk_sense_request(scsi->pc->rq))
658 kfree(scsi->pc->buf);
659 /* we need to call blk_put_request twice. */
660 blk_put_request(scsi->pc->rq);
661 blk_put_request(scsi->pc->rq);
669 spin_unlock_irq(&ide_lock);
671 if (test_bit(IDESCSI_LOG_CMD, &scsi->log))
672 printk (KERN_WARNING "ide-scsi: abort returns %s\n", ret == SUCCESS?"success":"failed");
677 static int idescsi_eh_reset (struct scsi_cmnd *cmd)
680 idescsi_scsi_t *scsi = scsihost_to_idescsi(cmd->device->host);
681 ide_drive_t *drive = scsi->drive;
685 /* In idescsi_eh_reset we forcefully remove the command from the ide subsystem and reset the device. */
687 if (test_bit(IDESCSI_LOG_CMD, &scsi->log))
688 printk (KERN_WARNING "ide-scsi: reset called for %lu\n", cmd->serial_number);
691 printk (KERN_WARNING "ide-scsi: Drive not set in idescsi_eh_reset\n");
696 spin_lock_irq(cmd->device->host->host_lock);
697 spin_lock(&ide_lock);
699 if (!scsi->pc || (req = scsi->pc->rq) != HWGROUP(drive)->rq || !HWGROUP(drive)->handler) {
700 printk (KERN_WARNING "ide-scsi: No active request in idescsi_eh_reset\n");
701 spin_unlock(&ide_lock);
702 spin_unlock_irq(cmd->device->host->host_lock);
706 /* kill current request */
707 if (__blk_end_request(req, -EIO, 0))
709 if (blk_sense_request(req))
710 kfree(scsi->pc->buf);
713 blk_put_request(req);
715 /* now nuke the drive queue */
716 while ((req = elv_next_request(drive->queue))) {
717 if (__blk_end_request(req, -EIO, 0))
721 HWGROUP(drive)->rq = NULL;
722 HWGROUP(drive)->handler = NULL;
723 HWGROUP(drive)->busy = 1; /* will set this to zero when ide reset finished */
724 spin_unlock(&ide_lock);
728 /* ide_do_reset starts a polling handler which restarts itself every 50ms until the reset finishes */
731 spin_unlock_irq(cmd->device->host->host_lock);
733 spin_lock_irq(cmd->device->host->host_lock);
734 } while ( HWGROUP(drive)->handler );
736 ready = drive_is_ready(drive);
737 HWGROUP(drive)->busy--;
739 printk (KERN_ERR "ide-scsi: reset failed!\n");
743 spin_unlock_irq(cmd->device->host->host_lock);
747 static int idescsi_bios(struct scsi_device *sdev, struct block_device *bdev,
748 sector_t capacity, int *parm)
750 idescsi_scsi_t *idescsi = scsihost_to_idescsi(sdev->host);
751 ide_drive_t *drive = idescsi->drive;
753 if (drive->bios_cyl && drive->bios_head && drive->bios_sect) {
754 parm[0] = drive->bios_head;
755 parm[1] = drive->bios_sect;
756 parm[2] = drive->bios_cyl;
761 static struct scsi_host_template idescsi_template = {
762 .module = THIS_MODULE,
764 .info = idescsi_info,
765 .slave_configure = idescsi_slave_configure,
766 .ioctl = idescsi_ioctl,
767 .queuecommand = idescsi_queue,
768 .eh_abort_handler = idescsi_eh_abort,
769 .eh_host_reset_handler = idescsi_eh_reset,
770 .bios_param = idescsi_bios,
776 .use_clustering = DISABLE_CLUSTERING,
778 .proc_name = "ide-scsi",
781 static int ide_scsi_probe(ide_drive_t *drive)
783 idescsi_scsi_t *idescsi;
784 struct Scsi_Host *host;
790 if (!warned && drive->media == ide_cdrom) {
791 printk(KERN_WARNING "ide-scsi is deprecated for cd burning! Use ide-cd and give dev=/dev/hdX as device\n");
795 if (idescsi_nocd && drive->media == ide_cdrom)
798 if (!strstr("ide-scsi", drive->driver_req) ||
799 drive->media == ide_disk ||
800 !(host = scsi_host_alloc(&idescsi_template,sizeof(idescsi_scsi_t))))
805 g = alloc_disk(1 << PARTN_BITS);
809 ide_init_disk(g, drive);
813 last_lun = drive->id[ATA_ID_LAST_LUN];
815 debug_log("%s: last_lun=%u\n", drive->name, last_lun);
817 if ((last_lun & 7) != 7)
818 host->max_lun = (last_lun & 7) + 1;
822 drive->driver_data = host;
823 idescsi = scsihost_to_idescsi(host);
824 idescsi->drive = drive;
825 idescsi->driver = &idescsi_driver;
826 idescsi->host = host;
828 g->private_data = &idescsi->driver;
830 idescsi_setup(drive, idescsi);
831 g->fops = &idescsi_ops;
832 ide_register_region(g);
833 err = scsi_add_host(host, &drive->gendev);
835 scsi_scan_host(host);
838 /* fall through on error */
839 ide_unregister_region(g);
840 ide_proc_unregister_driver(drive, &idescsi_driver);
849 static int __init init_idescsi_module(void)
851 return driver_register(&idescsi_driver.gen_driver);
854 static void __exit exit_idescsi_module(void)
856 driver_unregister(&idescsi_driver.gen_driver);
859 module_param(idescsi_nocd, int, 0600);
860 MODULE_PARM_DESC(idescsi_nocd, "Disable handling of CD-ROMs so they may be driven by ide-cd");
861 module_init(init_idescsi_module);
862 module_exit(exit_idescsi_module);
863 MODULE_LICENSE("GPL");