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);
134 * PIO data transfer routine using the scatter gather table.
136 static void ide_scsi_io_buffers(ide_drive_t *drive, struct ide_atapi_pc *pc,
137 unsigned int bcount, int write)
139 ide_hwif_t *hwif = drive->hwif;
140 const struct ide_tp_ops *tp_ops = hwif->tp_ops;
141 xfer_func_t *xf = write ? tp_ops->output_data : tp_ops->input_data;
146 count = min(pc->sg->length - pc->b_count, bcount);
147 if (PageHighMem(sg_page(pc->sg))) {
150 local_irq_save(flags);
151 buf = kmap_atomic(sg_page(pc->sg), KM_IRQ0) +
153 xf(drive, NULL, buf + pc->b_count, count);
154 kunmap_atomic(buf - pc->sg->offset, KM_IRQ0);
155 local_irq_restore(flags);
157 buf = sg_virt(pc->sg);
158 xf(drive, NULL, buf + pc->b_count, count);
160 bcount -= count; pc->b_count += count;
161 if (pc->b_count == pc->sg->length) {
164 pc->sg = sg_next(pc->sg);
170 printk(KERN_ERR "%s: scatter gather table too small, %s\n",
171 drive->name, write ? "padding with zeros"
172 : "discarding data");
173 ide_pad_transfer(drive, write, bcount);
177 static void ide_scsi_hex_dump(u8 *data, int len)
179 print_hex_dump(KERN_CONT, "", DUMP_PREFIX_NONE, 16, 1, data, len, 0);
182 static int idescsi_end_request(ide_drive_t *, int, int);
184 static void ide_scsi_callback(ide_drive_t *drive)
186 idescsi_scsi_t *scsi = drive_to_idescsi(drive);
187 struct ide_atapi_pc *pc = scsi->pc;
189 if (pc->flags & PC_FLAG_TIMEDOUT)
190 debug_log("%s: got timed out packet %lu at %lu\n", __func__,
191 pc->scsi_cmd->serial_number, jiffies);
192 /* end this request now - scsi should retry it*/
193 else if (test_bit(IDESCSI_LOG_CMD, &scsi->log))
194 printk(KERN_INFO "Packet command completed, %d bytes"
195 " transferred\n", pc->xferred);
197 idescsi_end_request(drive, 1, 0);
200 static int idescsi_check_condition(ide_drive_t *drive,
201 struct request *failed_cmd)
203 idescsi_scsi_t *scsi = drive_to_idescsi(drive);
204 struct ide_atapi_pc *pc;
208 /* stuff a sense request in front of our current request */
209 pc = kzalloc(sizeof(struct ide_atapi_pc), GFP_ATOMIC);
210 rq = blk_get_request(drive->queue, READ, GFP_ATOMIC);
211 buf = kzalloc(SCSI_SENSE_BUFFERSIZE, GFP_ATOMIC);
212 if (!pc || !rq || !buf) {
219 rq->special = (char *) pc;
222 pc->c[0] = REQUEST_SENSE;
223 pc->c[4] = pc->req_xfer = pc->buf_size = SCSI_SENSE_BUFFERSIZE;
224 rq->cmd_type = REQ_TYPE_SENSE;
225 rq->cmd_flags |= REQ_PREEMPT;
226 pc->timeout = jiffies + WAIT_READY;
227 /* NOTE! Save the failed packet command in "rq->buffer" */
228 rq->buffer = (void *) failed_cmd->special;
229 pc->scsi_cmd = ((struct ide_atapi_pc *) failed_cmd->special)->scsi_cmd;
230 if (test_bit(IDESCSI_LOG_CMD, &scsi->log)) {
231 printk ("ide-scsi: %s: queue cmd = ", drive->name);
232 ide_scsi_hex_dump(pc->c, 6);
234 rq->rq_disk = scsi->disk;
236 memcpy(rq->cmd, pc->c, 12);
237 ide_do_drive_cmd(drive, rq);
241 static ide_startstop_t
242 idescsi_atapi_error(ide_drive_t *drive, struct request *rq, u8 stat, u8 err)
244 ide_hwif_t *hwif = drive->hwif;
246 if (hwif->tp_ops->read_status(hwif) & (ATA_BUSY | ATA_DRQ))
248 hwif->tp_ops->exec_command(hwif, ATA_CMD_IDLEIMMEDIATE);
252 idescsi_end_request(drive, 0, 0);
257 static int idescsi_end_request (ide_drive_t *drive, int uptodate, int nrsecs)
259 idescsi_scsi_t *scsi = drive_to_idescsi(drive);
260 struct request *rq = HWGROUP(drive)->rq;
261 struct ide_atapi_pc *pc = (struct ide_atapi_pc *) rq->special;
262 int log = test_bit(IDESCSI_LOG_CMD, &scsi->log);
263 struct Scsi_Host *host;
264 int errors = rq->errors;
267 if (!blk_special_request(rq) && !blk_sense_request(rq)) {
268 ide_end_request(drive, uptodate, nrsecs);
271 ide_end_drive_cmd (drive, 0, 0);
272 if (blk_sense_request(rq)) {
273 struct ide_atapi_pc *opc = (struct ide_atapi_pc *) rq->buffer;
275 printk ("ide-scsi: %s: wrap up check %lu, rst = ", drive->name, opc->scsi_cmd->serial_number);
276 ide_scsi_hex_dump(pc->buf, 16);
278 memcpy((void *) opc->scsi_cmd->sense_buffer, pc->buf,
279 SCSI_SENSE_BUFFERSIZE);
285 pc->scsi_cmd->result = (CHECK_CONDITION << 1) |
286 (((pc->flags & PC_FLAG_TIMEDOUT) ?
289 } else if (pc->flags & PC_FLAG_TIMEDOUT) {
291 printk (KERN_WARNING "ide-scsi: %s: timed out for %lu\n",
292 drive->name, pc->scsi_cmd->serial_number);
293 pc->scsi_cmd->result = DID_TIME_OUT << 16;
294 } else if (errors >= ERROR_MAX) {
295 pc->scsi_cmd->result = DID_ERROR << 16;
297 printk ("ide-scsi: %s: I/O error for %lu\n", drive->name, pc->scsi_cmd->serial_number);
300 printk ("ide-scsi: %s: check condition for %lu\n", drive->name, pc->scsi_cmd->serial_number);
301 if (!idescsi_check_condition(drive, rq))
302 /* we started a request sense, so we'll be back, exit for now */
304 pc->scsi_cmd->result = (CHECK_CONDITION << 1) | (DID_OK << 16);
306 pc->scsi_cmd->result = DID_OK << 16;
308 host = pc->scsi_cmd->device->host;
309 spin_lock_irqsave(host->host_lock, flags);
310 pc->done(pc->scsi_cmd);
311 spin_unlock_irqrestore(host->host_lock, flags);
318 static inline unsigned long get_timeout(struct ide_atapi_pc *pc)
320 return max_t(unsigned long, WAIT_CMD, pc->timeout - jiffies);
323 static int idescsi_expiry(ide_drive_t *drive)
325 idescsi_scsi_t *scsi = drive_to_idescsi(drive);
326 struct ide_atapi_pc *pc = scsi->pc;
328 debug_log("%s called for %lu at %lu\n", __func__,
329 pc->scsi_cmd->serial_number, jiffies);
331 pc->flags |= PC_FLAG_TIMEDOUT;
333 return 0; /* we do not want the ide subsystem to retry */
337 * Our interrupt handler.
339 static ide_startstop_t idescsi_pc_intr (ide_drive_t *drive)
341 idescsi_scsi_t *scsi = drive_to_idescsi(drive);
342 struct ide_atapi_pc *pc = scsi->pc;
344 return ide_pc_intr(drive, pc, idescsi_pc_intr, get_timeout(pc),
345 idescsi_expiry, NULL, NULL, NULL,
346 ide_scsi_io_buffers);
349 static ide_startstop_t idescsi_transfer_pc(ide_drive_t *drive)
351 idescsi_scsi_t *scsi = drive_to_idescsi(drive);
353 return ide_transfer_pc(drive, scsi->pc, idescsi_pc_intr,
354 get_timeout(scsi->pc), idescsi_expiry);
357 static inline int idescsi_set_direction(struct ide_atapi_pc *pc)
360 case READ_6: case READ_10: case READ_12:
361 pc->flags &= ~PC_FLAG_WRITING;
363 case WRITE_6: case WRITE_10: case WRITE_12:
364 pc->flags |= PC_FLAG_WRITING;
371 static int idescsi_map_sg(ide_drive_t *drive, struct ide_atapi_pc *pc)
373 ide_hwif_t *hwif = drive->hwif;
374 struct scatterlist *sg, *scsi_sg;
377 if (!pc->req_xfer || pc->req_xfer % 1024)
380 if (idescsi_set_direction(pc))
384 scsi_sg = scsi_sglist(pc->scsi_cmd);
385 segments = scsi_sg_count(pc->scsi_cmd);
387 if (segments > hwif->sg_max_nents)
390 hwif->sg_nents = segments;
391 memcpy(sg, scsi_sg, sizeof(*sg) * segments);
396 static ide_startstop_t idescsi_issue_pc(ide_drive_t *drive,
397 struct ide_atapi_pc *pc)
399 idescsi_scsi_t *scsi = drive_to_idescsi(drive);
401 /* Set the current packet command */
404 return ide_issue_pc(drive, pc, idescsi_transfer_pc,
405 get_timeout(pc), idescsi_expiry);
409 * idescsi_do_request is our request handling function.
411 static ide_startstop_t idescsi_do_request (ide_drive_t *drive, struct request *rq, sector_t block)
413 debug_log("dev: %s, cmd: %x, errors: %d\n", rq->rq_disk->disk_name,
414 rq->cmd[0], rq->errors);
415 debug_log("sector: %ld, nr_sectors: %ld, current_nr_sectors: %d\n",
416 rq->sector, rq->nr_sectors, rq->current_nr_sectors);
418 if (blk_sense_request(rq) || blk_special_request(rq)) {
419 struct ide_atapi_pc *pc = (struct ide_atapi_pc *)rq->special;
421 if (drive->using_dma && !idescsi_map_sg(drive, pc))
422 pc->flags |= PC_FLAG_DMA_OK;
424 return idescsi_issue_pc(drive, pc);
426 blk_dump_rq_flags(rq, "ide-scsi: unsup command");
427 idescsi_end_request (drive, 0, 0);
431 #ifdef CONFIG_IDE_PROC_FS
432 #define ide_scsi_devset_get(name, field) \
433 static int get_##name(ide_drive_t *drive) \
435 idescsi_scsi_t *scsi = drive_to_idescsi(drive); \
436 return scsi->field; \
439 #define ide_scsi_devset_set(name, field) \
440 static int set_##name(ide_drive_t *drive, int arg) \
442 idescsi_scsi_t *scsi = drive_to_idescsi(drive); \
447 #define ide_scsi_devset_rw(_name, _min, _max, _field) \
448 ide_scsi_devset_get(_name, _field); \
449 ide_scsi_devset_set(_name, _field); \
450 IDE_DEVSET(_name, S_RW, _min, _max, get_##_name, set_##_name)
452 ide_devset_rw(bios_cyl, 0, 1023, bios_cyl);
453 ide_devset_rw(bios_head, 0, 255, bios_head);
454 ide_devset_rw(bios_sect, 0, 63, bios_sect);
456 ide_scsi_devset_rw(transform, 0, 3, transform);
457 ide_scsi_devset_rw(log, 0, 1, log);
459 static const struct ide_devset *idescsi_settings[] = {
460 &ide_devset_bios_cyl,
461 &ide_devset_bios_head,
462 &ide_devset_bios_sect,
464 &ide_devset_transform,
470 * Driver initialization.
472 static void idescsi_setup (ide_drive_t *drive, idescsi_scsi_t *scsi)
474 if ((drive->id[ATA_ID_CONFIG] & 0x0060) == 0x20)
475 set_bit(IDE_AFLAG_DRQ_INTERRUPT, &drive->atapi_flags);
476 clear_bit(IDESCSI_SG_TRANSFORM, &scsi->transform);
477 #if IDESCSI_DEBUG_LOG
478 set_bit(IDESCSI_LOG_CMD, &scsi->log);
479 #endif /* IDESCSI_DEBUG_LOG */
481 drive->pc_callback = ide_scsi_callback;
483 ide_proc_register_driver(drive, scsi->driver);
486 static void ide_scsi_remove(ide_drive_t *drive)
488 struct Scsi_Host *scsihost = drive->driver_data;
489 struct ide_scsi_obj *scsi = scsihost_to_idescsi(scsihost);
490 struct gendisk *g = scsi->disk;
492 scsi_remove_host(scsihost);
493 ide_proc_unregister_driver(drive, scsi->driver);
495 ide_unregister_region(g);
497 drive->driver_data = NULL;
498 g->private_data = NULL;
506 static int ide_scsi_probe(ide_drive_t *);
508 #ifdef CONFIG_IDE_PROC_FS
509 static ide_proc_entry_t idescsi_proc[] = {
510 { "capacity", S_IFREG|S_IRUGO, proc_ide_read_capacity, NULL },
511 { NULL, 0, NULL, NULL }
515 static ide_driver_t idescsi_driver = {
517 .owner = THIS_MODULE,
519 .bus = &ide_bus_type,
521 .probe = ide_scsi_probe,
522 .remove = ide_scsi_remove,
523 .version = IDESCSI_VERSION,
525 .supports_dsc_overlap = 0,
526 .do_request = idescsi_do_request,
527 .end_request = idescsi_end_request,
528 .error = idescsi_atapi_error,
529 #ifdef CONFIG_IDE_PROC_FS
530 .proc = idescsi_proc,
531 .settings = idescsi_settings,
535 static int idescsi_ide_open(struct inode *inode, struct file *filp)
537 struct gendisk *disk = inode->i_bdev->bd_disk;
538 struct ide_scsi_obj *scsi;
540 if (!(scsi = ide_scsi_get(disk)))
546 static int idescsi_ide_release(struct inode *inode, struct file *filp)
548 struct gendisk *disk = inode->i_bdev->bd_disk;
549 struct ide_scsi_obj *scsi = ide_scsi_g(disk);
556 static int idescsi_ide_ioctl(struct inode *inode, struct file *file,
557 unsigned int cmd, unsigned long arg)
559 struct block_device *bdev = inode->i_bdev;
560 struct ide_scsi_obj *scsi = ide_scsi_g(bdev->bd_disk);
561 return generic_ide_ioctl(scsi->drive, file, bdev, cmd, arg);
564 static struct block_device_operations idescsi_ops = {
565 .owner = THIS_MODULE,
566 .open = idescsi_ide_open,
567 .release = idescsi_ide_release,
568 .ioctl = idescsi_ide_ioctl,
571 static int idescsi_slave_configure(struct scsi_device * sdp)
573 /* Configure detected device */
574 sdp->use_10_for_rw = 1;
575 sdp->use_10_for_ms = 1;
576 scsi_adjust_queue_depth(sdp, MSG_SIMPLE_TAG, sdp->host->cmd_per_lun);
580 static const char *idescsi_info (struct Scsi_Host *host)
582 return "SCSI host adapter emulation for IDE ATAPI devices";
585 static int idescsi_ioctl (struct scsi_device *dev, int cmd, void __user *arg)
587 idescsi_scsi_t *scsi = scsihost_to_idescsi(dev->host);
589 if (cmd == SG_SET_TRANSFORM) {
591 set_bit(IDESCSI_SG_TRANSFORM, &scsi->transform);
593 clear_bit(IDESCSI_SG_TRANSFORM, &scsi->transform);
595 } else if (cmd == SG_GET_TRANSFORM)
596 return put_user(test_bit(IDESCSI_SG_TRANSFORM, &scsi->transform), (int __user *) arg);
600 static int idescsi_queue (struct scsi_cmnd *cmd,
601 void (*done)(struct scsi_cmnd *))
603 struct Scsi_Host *host = cmd->device->host;
604 idescsi_scsi_t *scsi = scsihost_to_idescsi(host);
605 ide_drive_t *drive = scsi->drive;
606 struct request *rq = NULL;
607 struct ide_atapi_pc *pc = NULL;
608 int write = cmd->sc_data_direction == DMA_TO_DEVICE;
611 scmd_printk (KERN_ERR, cmd, "drive not present\n");
614 scsi = drive_to_idescsi(drive);
615 pc = kmalloc(sizeof(struct ide_atapi_pc), GFP_ATOMIC);
616 rq = blk_get_request(drive->queue, write, GFP_ATOMIC);
617 if (rq == NULL || pc == NULL) {
618 printk (KERN_ERR "ide-scsi: %s: out of memory\n", drive->name);
622 memset (pc->c, 0, 12);
624 if (cmd->sc_data_direction == DMA_TO_DEVICE)
625 pc->flags |= PC_FLAG_WRITING;
627 memcpy (pc->c, cmd->cmnd, cmd->cmd_len);
629 pc->sg = scsi_sglist(cmd);
630 pc->sg_cnt = scsi_sg_count(cmd);
632 pc->req_xfer = pc->buf_size = scsi_bufflen(cmd);
635 pc->timeout = jiffies + cmd->request->timeout;
637 if (test_bit(IDESCSI_LOG_CMD, &scsi->log)) {
638 printk ("ide-scsi: %s: que %lu, cmd = ", drive->name, cmd->serial_number);
639 ide_scsi_hex_dump(cmd->cmnd, cmd->cmd_len);
640 if (memcmp(pc->c, cmd->cmnd, cmd->cmd_len)) {
641 printk ("ide-scsi: %s: que %lu, tsl = ", drive->name, cmd->serial_number);
642 ide_scsi_hex_dump(pc->c, 12);
646 rq->special = (char *) pc;
647 rq->cmd_type = REQ_TYPE_SPECIAL;
648 spin_unlock_irq(host->host_lock);
650 memcpy(rq->cmd, pc->c, 12);
651 blk_execute_rq_nowait(drive->queue, scsi->disk, rq, 0, NULL);
652 spin_lock_irq(host->host_lock);
658 cmd->result = DID_ERROR << 16;
663 static int idescsi_eh_abort (struct scsi_cmnd *cmd)
665 idescsi_scsi_t *scsi = scsihost_to_idescsi(cmd->device->host);
666 ide_drive_t *drive = scsi->drive;
670 /* In idescsi_eh_abort we try to gently pry our command from the ide subsystem */
672 if (test_bit(IDESCSI_LOG_CMD, &scsi->log))
673 printk (KERN_WARNING "ide-scsi: abort called for %lu\n", cmd->serial_number);
676 printk (KERN_WARNING "ide-scsi: Drive not set in idescsi_eh_abort\n");
681 /* First give it some more time, how much is "right" is hard to say :-( */
683 busy = ide_wait_not_busy(HWIF(drive), 100); /* FIXME - uses mdelay which causes latency? */
684 if (test_bit(IDESCSI_LOG_CMD, &scsi->log))
685 printk (KERN_WARNING "ide-scsi: drive did%s become ready\n", busy?" not":"");
687 spin_lock_irq(&ide_lock);
689 /* If there is no pc running we're done (our interrupt took care of it) */
695 /* It's somewhere in flight. Does ide subsystem agree? */
696 if (scsi->pc->scsi_cmd->serial_number == cmd->serial_number && !busy &&
697 elv_queue_empty(drive->queue) && HWGROUP(drive)->rq != scsi->pc->rq) {
699 * FIXME - not sure this condition can ever occur
701 printk (KERN_ERR "ide-scsi: cmd aborted!\n");
703 if (blk_sense_request(scsi->pc->rq))
704 kfree(scsi->pc->buf);
705 /* we need to call blk_put_request twice. */
706 blk_put_request(scsi->pc->rq);
707 blk_put_request(scsi->pc->rq);
715 spin_unlock_irq(&ide_lock);
717 if (test_bit(IDESCSI_LOG_CMD, &scsi->log))
718 printk (KERN_WARNING "ide-scsi: abort returns %s\n", ret == SUCCESS?"success":"failed");
723 static int idescsi_eh_reset (struct scsi_cmnd *cmd)
726 idescsi_scsi_t *scsi = scsihost_to_idescsi(cmd->device->host);
727 ide_drive_t *drive = scsi->drive;
731 /* In idescsi_eh_reset we forcefully remove the command from the ide subsystem and reset the device. */
733 if (test_bit(IDESCSI_LOG_CMD, &scsi->log))
734 printk (KERN_WARNING "ide-scsi: reset called for %lu\n", cmd->serial_number);
737 printk (KERN_WARNING "ide-scsi: Drive not set in idescsi_eh_reset\n");
742 spin_lock_irq(cmd->device->host->host_lock);
743 spin_lock(&ide_lock);
745 if (!scsi->pc || (req = scsi->pc->rq) != HWGROUP(drive)->rq || !HWGROUP(drive)->handler) {
746 printk (KERN_WARNING "ide-scsi: No active request in idescsi_eh_reset\n");
747 spin_unlock(&ide_lock);
748 spin_unlock_irq(cmd->device->host->host_lock);
752 /* kill current request */
753 if (__blk_end_request(req, -EIO, 0))
755 if (blk_sense_request(req))
756 kfree(scsi->pc->buf);
759 blk_put_request(req);
761 /* now nuke the drive queue */
762 while ((req = elv_next_request(drive->queue))) {
763 if (__blk_end_request(req, -EIO, 0))
767 HWGROUP(drive)->rq = NULL;
768 HWGROUP(drive)->handler = NULL;
769 HWGROUP(drive)->busy = 1; /* will set this to zero when ide reset finished */
770 spin_unlock(&ide_lock);
774 /* ide_do_reset starts a polling handler which restarts itself every 50ms until the reset finishes */
777 spin_unlock_irq(cmd->device->host->host_lock);
779 spin_lock_irq(cmd->device->host->host_lock);
780 } while ( HWGROUP(drive)->handler );
782 ready = drive_is_ready(drive);
783 HWGROUP(drive)->busy--;
785 printk (KERN_ERR "ide-scsi: reset failed!\n");
789 spin_unlock_irq(cmd->device->host->host_lock);
793 static int idescsi_bios(struct scsi_device *sdev, struct block_device *bdev,
794 sector_t capacity, int *parm)
796 idescsi_scsi_t *idescsi = scsihost_to_idescsi(sdev->host);
797 ide_drive_t *drive = idescsi->drive;
799 if (drive->bios_cyl && drive->bios_head && drive->bios_sect) {
800 parm[0] = drive->bios_head;
801 parm[1] = drive->bios_sect;
802 parm[2] = drive->bios_cyl;
807 static struct scsi_host_template idescsi_template = {
808 .module = THIS_MODULE,
810 .info = idescsi_info,
811 .slave_configure = idescsi_slave_configure,
812 .ioctl = idescsi_ioctl,
813 .queuecommand = idescsi_queue,
814 .eh_abort_handler = idescsi_eh_abort,
815 .eh_host_reset_handler = idescsi_eh_reset,
816 .bios_param = idescsi_bios,
822 .use_clustering = DISABLE_CLUSTERING,
824 .proc_name = "ide-scsi",
827 static int ide_scsi_probe(ide_drive_t *drive)
829 idescsi_scsi_t *idescsi;
830 struct Scsi_Host *host;
836 if (!warned && drive->media == ide_cdrom) {
837 printk(KERN_WARNING "ide-scsi is deprecated for cd burning! Use ide-cd and give dev=/dev/hdX as device\n");
841 if (idescsi_nocd && drive->media == ide_cdrom)
844 if (!strstr("ide-scsi", drive->driver_req) ||
845 drive->media == ide_disk ||
846 !(host = scsi_host_alloc(&idescsi_template,sizeof(idescsi_scsi_t))))
851 g = alloc_disk(1 << PARTN_BITS);
855 ide_init_disk(g, drive);
859 last_lun = drive->id[ATA_ID_LAST_LUN];
861 debug_log("%s: last_lun=%u\n", drive->name, last_lun);
863 if ((last_lun & 7) != 7)
864 host->max_lun = (last_lun & 7) + 1;
868 drive->driver_data = host;
869 idescsi = scsihost_to_idescsi(host);
870 idescsi->drive = drive;
871 idescsi->driver = &idescsi_driver;
872 idescsi->host = host;
874 g->private_data = &idescsi->driver;
876 idescsi_setup(drive, idescsi);
877 g->fops = &idescsi_ops;
878 ide_register_region(g);
879 err = scsi_add_host(host, &drive->gendev);
881 scsi_scan_host(host);
884 /* fall through on error */
885 ide_unregister_region(g);
886 ide_proc_unregister_driver(drive, &idescsi_driver);
895 static int __init init_idescsi_module(void)
897 return driver_register(&idescsi_driver.gen_driver);
900 static void __exit exit_idescsi_module(void)
902 driver_unregister(&idescsi_driver.gen_driver);
905 module_param(idescsi_nocd, int, 0600);
906 MODULE_PARM_DESC(idescsi_nocd, "Disable handling of CD-ROMs so they may be driven by ide-cd");
907 module_init(init_idescsi_module);
908 module_exit(exit_idescsi_module);
909 MODULE_LICENSE("GPL");