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/hdreg.h>
44 #include <linux/slab.h>
45 #include <linux/ide.h>
46 #include <linux/scatterlist.h>
47 #include <linux/delay.h>
48 #include <linux/mutex.h>
49 #include <linux/bitops.h>
52 #include <asm/uaccess.h>
54 #include <scsi/scsi.h>
55 #include <scsi/scsi_cmnd.h>
56 #include <scsi/scsi_device.h>
57 #include <scsi/scsi_host.h>
58 #include <scsi/scsi_tcq.h>
61 #define IDESCSI_DEBUG_LOG 0
64 #define debug_log(fmt, args...) \
65 printk(KERN_INFO "ide-scsi: " fmt, ## args)
67 #define debug_log(fmt, args...) do {} while (0)
71 * SCSI command transformation layer
73 #define IDESCSI_SG_TRANSFORM 1 /* /dev/sg transformation */
78 #define IDESCSI_LOG_CMD 0 /* Log SCSI commands */
80 typedef struct ide_scsi_obj {
84 struct Scsi_Host *host;
86 struct ide_atapi_pc *pc; /* Current packet command */
87 unsigned long flags; /* Status/Action flags */
88 unsigned long transform; /* SCSI cmd translation layer */
89 unsigned long log; /* log flags */
92 static DEFINE_MUTEX(idescsi_ref_mutex);
93 /* Set by module param to skip cd */
94 static int idescsi_nocd;
96 #define ide_scsi_g(disk) \
97 container_of((disk)->private_data, struct ide_scsi_obj, driver)
99 static struct ide_scsi_obj *ide_scsi_get(struct gendisk *disk)
101 struct ide_scsi_obj *scsi = NULL;
103 mutex_lock(&idescsi_ref_mutex);
104 scsi = ide_scsi_g(disk);
106 scsi_host_get(scsi->host);
107 mutex_unlock(&idescsi_ref_mutex);
111 static void ide_scsi_put(struct ide_scsi_obj *scsi)
113 mutex_lock(&idescsi_ref_mutex);
114 scsi_host_put(scsi->host);
115 mutex_unlock(&idescsi_ref_mutex);
118 static inline idescsi_scsi_t *scsihost_to_idescsi(struct Scsi_Host *host)
120 return (idescsi_scsi_t*) (&host[1]);
123 static inline idescsi_scsi_t *drive_to_idescsi(ide_drive_t *ide_drive)
125 return scsihost_to_idescsi(ide_drive->driver_data);
129 * Per ATAPI device status bits.
131 #define IDESCSI_DRQ_INTERRUPT 0 /* DRQ interrupt device */
136 #define IDESCSI_PC_RQ 90
139 * PIO data transfer routine using the scatter gather table.
141 static void ide_scsi_io_buffers(ide_drive_t *drive, struct ide_atapi_pc *pc,
142 unsigned int bcount, int write)
144 ide_hwif_t *hwif = drive->hwif;
145 const struct ide_tp_ops *tp_ops = hwif->tp_ops;
146 xfer_func_t *xf = write ? tp_ops->output_data : tp_ops->input_data;
151 count = min(pc->sg->length - pc->b_count, bcount);
152 if (PageHighMem(sg_page(pc->sg))) {
155 local_irq_save(flags);
156 buf = kmap_atomic(sg_page(pc->sg), KM_IRQ0) +
158 xf(drive, NULL, buf + pc->b_count, count);
159 kunmap_atomic(buf - pc->sg->offset, KM_IRQ0);
160 local_irq_restore(flags);
162 buf = sg_virt(pc->sg);
163 xf(drive, NULL, buf + pc->b_count, count);
165 bcount -= count; pc->b_count += count;
166 if (pc->b_count == pc->sg->length) {
169 pc->sg = sg_next(pc->sg);
175 printk(KERN_ERR "%s: scatter gather table too small, %s\n",
176 drive->name, write ? "padding with zeros"
177 : "discarding data");
178 ide_pad_transfer(drive, write, bcount);
182 static void ide_scsi_hex_dump(u8 *data, int len)
184 print_hex_dump(KERN_CONT, "", DUMP_PREFIX_NONE, 16, 1, data, len, 0);
187 static int idescsi_end_request(ide_drive_t *, int, int);
189 static void ide_scsi_callback(ide_drive_t *drive)
191 idescsi_scsi_t *scsi = drive_to_idescsi(drive);
192 struct ide_atapi_pc *pc = scsi->pc;
194 if (pc->flags & PC_FLAG_TIMEDOUT)
195 debug_log("%s: got timed out packet %lu at %lu\n", __func__,
196 pc->scsi_cmd->serial_number, jiffies);
197 /* end this request now - scsi should retry it*/
198 else if (test_bit(IDESCSI_LOG_CMD, &scsi->log))
199 printk(KERN_INFO "Packet command completed, %d bytes"
200 " transferred\n", pc->xferred);
202 idescsi_end_request(drive, 1, 0);
205 static int idescsi_check_condition(ide_drive_t *drive,
206 struct request *failed_cmd)
208 idescsi_scsi_t *scsi = drive_to_idescsi(drive);
209 struct ide_atapi_pc *pc;
213 /* stuff a sense request in front of our current request */
214 pc = kzalloc(sizeof(struct ide_atapi_pc), GFP_ATOMIC);
215 rq = kmalloc(sizeof(struct request), GFP_ATOMIC);
216 buf = kzalloc(SCSI_SENSE_BUFFERSIZE, GFP_ATOMIC);
217 if (!pc || !rq || !buf) {
223 blk_rq_init(NULL, rq);
224 rq->special = (char *) pc;
227 pc->c[0] = REQUEST_SENSE;
228 pc->c[4] = pc->req_xfer = pc->buf_size = SCSI_SENSE_BUFFERSIZE;
229 rq->cmd_type = REQ_TYPE_SENSE;
230 rq->cmd_flags |= REQ_PREEMPT;
231 pc->timeout = jiffies + WAIT_READY;
232 /* NOTE! Save the failed packet command in "rq->buffer" */
233 rq->buffer = (void *) failed_cmd->special;
234 pc->scsi_cmd = ((struct ide_atapi_pc *) failed_cmd->special)->scsi_cmd;
235 if (test_bit(IDESCSI_LOG_CMD, &scsi->log)) {
236 printk ("ide-scsi: %s: queue cmd = ", drive->name);
237 ide_scsi_hex_dump(pc->c, 6);
239 rq->rq_disk = scsi->disk;
240 memcpy(rq->cmd, pc->c, 12);
241 ide_do_drive_cmd(drive, rq);
245 static ide_startstop_t
246 idescsi_atapi_error(ide_drive_t *drive, struct request *rq, u8 stat, u8 err)
248 ide_hwif_t *hwif = drive->hwif;
250 if (hwif->tp_ops->read_status(hwif) & (BUSY_STAT | DRQ_STAT))
252 hwif->tp_ops->exec_command(hwif, WIN_IDLEIMMEDIATE);
256 idescsi_end_request(drive, 0, 0);
261 static int idescsi_end_request (ide_drive_t *drive, int uptodate, int nrsecs)
263 idescsi_scsi_t *scsi = drive_to_idescsi(drive);
264 struct request *rq = HWGROUP(drive)->rq;
265 struct ide_atapi_pc *pc = (struct ide_atapi_pc *) rq->special;
266 int log = test_bit(IDESCSI_LOG_CMD, &scsi->log);
267 struct Scsi_Host *host;
268 int errors = rq->errors;
271 if (!blk_special_request(rq) && !blk_sense_request(rq)) {
272 ide_end_request(drive, uptodate, nrsecs);
275 ide_end_drive_cmd (drive, 0, 0);
276 if (blk_sense_request(rq)) {
277 struct ide_atapi_pc *opc = (struct ide_atapi_pc *) rq->buffer;
279 printk ("ide-scsi: %s: wrap up check %lu, rst = ", drive->name, opc->scsi_cmd->serial_number);
280 ide_scsi_hex_dump(pc->buf, 16);
282 memcpy((void *) opc->scsi_cmd->sense_buffer, pc->buf,
283 SCSI_SENSE_BUFFERSIZE);
289 pc->scsi_cmd->result = (CHECK_CONDITION << 1) |
290 (((pc->flags & PC_FLAG_TIMEDOUT) ?
293 } else if (pc->flags & PC_FLAG_TIMEDOUT) {
295 printk (KERN_WARNING "ide-scsi: %s: timed out for %lu\n",
296 drive->name, pc->scsi_cmd->serial_number);
297 pc->scsi_cmd->result = DID_TIME_OUT << 16;
298 } else if (errors >= ERROR_MAX) {
299 pc->scsi_cmd->result = DID_ERROR << 16;
301 printk ("ide-scsi: %s: I/O error for %lu\n", drive->name, pc->scsi_cmd->serial_number);
304 printk ("ide-scsi: %s: check condition for %lu\n", drive->name, pc->scsi_cmd->serial_number);
305 if (!idescsi_check_condition(drive, rq))
306 /* we started a request sense, so we'll be back, exit for now */
308 pc->scsi_cmd->result = (CHECK_CONDITION << 1) | (DID_OK << 16);
310 pc->scsi_cmd->result = DID_OK << 16;
312 host = pc->scsi_cmd->device->host;
313 spin_lock_irqsave(host->host_lock, flags);
314 pc->done(pc->scsi_cmd);
315 spin_unlock_irqrestore(host->host_lock, flags);
322 static inline unsigned long get_timeout(struct ide_atapi_pc *pc)
324 return max_t(unsigned long, WAIT_CMD, pc->timeout - jiffies);
327 static int idescsi_expiry(ide_drive_t *drive)
329 idescsi_scsi_t *scsi = drive_to_idescsi(drive);
330 struct ide_atapi_pc *pc = scsi->pc;
332 debug_log("%s called for %lu at %lu\n", __func__,
333 pc->scsi_cmd->serial_number, jiffies);
335 pc->flags |= PC_FLAG_TIMEDOUT;
337 return 0; /* we do not want the ide subsystem to retry */
341 * Our interrupt handler.
343 static ide_startstop_t idescsi_pc_intr (ide_drive_t *drive)
345 idescsi_scsi_t *scsi = drive_to_idescsi(drive);
346 struct ide_atapi_pc *pc = scsi->pc;
348 return ide_pc_intr(drive, pc, idescsi_pc_intr, get_timeout(pc),
349 idescsi_expiry, NULL, NULL, NULL,
350 ide_scsi_io_buffers);
353 static ide_startstop_t idescsi_transfer_pc(ide_drive_t *drive)
355 idescsi_scsi_t *scsi = drive_to_idescsi(drive);
357 return ide_transfer_pc(drive, scsi->pc, idescsi_pc_intr,
358 get_timeout(scsi->pc), idescsi_expiry);
361 static inline int idescsi_set_direction(struct ide_atapi_pc *pc)
364 case READ_6: case READ_10: case READ_12:
365 pc->flags &= ~PC_FLAG_WRITING;
367 case WRITE_6: case WRITE_10: case WRITE_12:
368 pc->flags |= PC_FLAG_WRITING;
375 static int idescsi_map_sg(ide_drive_t *drive, struct ide_atapi_pc *pc)
377 ide_hwif_t *hwif = drive->hwif;
378 struct scatterlist *sg, *scsi_sg;
381 if (!pc->req_xfer || pc->req_xfer % 1024)
384 if (idescsi_set_direction(pc))
388 scsi_sg = scsi_sglist(pc->scsi_cmd);
389 segments = scsi_sg_count(pc->scsi_cmd);
391 if (segments > hwif->sg_max_nents)
394 hwif->sg_nents = segments;
395 memcpy(sg, scsi_sg, sizeof(*sg) * segments);
400 static ide_startstop_t idescsi_issue_pc(ide_drive_t *drive,
401 struct ide_atapi_pc *pc)
403 idescsi_scsi_t *scsi = drive_to_idescsi(drive);
405 /* Set the current packet command */
408 return ide_issue_pc(drive, pc, idescsi_transfer_pc,
409 get_timeout(pc), idescsi_expiry);
413 * idescsi_do_request is our request handling function.
415 static ide_startstop_t idescsi_do_request (ide_drive_t *drive, struct request *rq, sector_t block)
417 debug_log("dev: %s, cmd: %x, errors: %d\n", rq->rq_disk->disk_name,
418 rq->cmd[0], rq->errors);
419 debug_log("sector: %ld, nr_sectors: %ld, current_nr_sectors: %d\n",
420 rq->sector, rq->nr_sectors, rq->current_nr_sectors);
422 if (blk_sense_request(rq) || blk_special_request(rq)) {
423 struct ide_atapi_pc *pc = (struct ide_atapi_pc *)rq->special;
424 idescsi_scsi_t *scsi = drive_to_idescsi(drive);
426 if (test_bit(IDESCSI_DRQ_INTERRUPT, &scsi->flags))
427 pc->flags |= PC_FLAG_DRQ_INTERRUPT;
429 if (drive->using_dma && !idescsi_map_sg(drive, pc))
430 pc->flags |= PC_FLAG_DMA_OK;
432 return idescsi_issue_pc(drive, pc);
434 blk_dump_rq_flags(rq, "ide-scsi: unsup command");
435 idescsi_end_request (drive, 0, 0);
439 #ifdef CONFIG_IDE_PROC_FS
440 static void idescsi_add_settings(ide_drive_t *drive)
442 idescsi_scsi_t *scsi = drive_to_idescsi(drive);
445 * drive setting name read/write data type min max mul_factor div_factor data pointer set function
447 ide_add_setting(drive, "bios_cyl", SETTING_RW, TYPE_INT, 0, 1023, 1, 1, &drive->bios_cyl, NULL);
448 ide_add_setting(drive, "bios_head", SETTING_RW, TYPE_BYTE, 0, 255, 1, 1, &drive->bios_head, NULL);
449 ide_add_setting(drive, "bios_sect", SETTING_RW, TYPE_BYTE, 0, 63, 1, 1, &drive->bios_sect, NULL);
450 ide_add_setting(drive, "transform", SETTING_RW, TYPE_INT, 0, 3, 1, 1, &scsi->transform, NULL);
451 ide_add_setting(drive, "log", SETTING_RW, TYPE_INT, 0, 1, 1, 1, &scsi->log, NULL);
454 static inline void idescsi_add_settings(ide_drive_t *drive) { ; }
458 * Driver initialization.
460 static void idescsi_setup (ide_drive_t *drive, idescsi_scsi_t *scsi)
462 if (drive->id && (drive->id->config & 0x0060) == 0x20)
463 set_bit (IDESCSI_DRQ_INTERRUPT, &scsi->flags);
464 clear_bit(IDESCSI_SG_TRANSFORM, &scsi->transform);
465 #if IDESCSI_DEBUG_LOG
466 set_bit(IDESCSI_LOG_CMD, &scsi->log);
467 #endif /* IDESCSI_DEBUG_LOG */
469 drive->pc_callback = ide_scsi_callback;
471 idescsi_add_settings(drive);
474 static void ide_scsi_remove(ide_drive_t *drive)
476 struct Scsi_Host *scsihost = drive->driver_data;
477 struct ide_scsi_obj *scsi = scsihost_to_idescsi(scsihost);
478 struct gendisk *g = scsi->disk;
480 scsi_remove_host(scsihost);
481 ide_proc_unregister_driver(drive, scsi->driver);
483 ide_unregister_region(g);
485 drive->driver_data = NULL;
486 g->private_data = NULL;
494 static int ide_scsi_probe(ide_drive_t *);
496 #ifdef CONFIG_IDE_PROC_FS
497 static ide_proc_entry_t idescsi_proc[] = {
498 { "capacity", S_IFREG|S_IRUGO, proc_ide_read_capacity, NULL },
499 { NULL, 0, NULL, NULL }
503 static ide_driver_t idescsi_driver = {
505 .owner = THIS_MODULE,
507 .bus = &ide_bus_type,
509 .probe = ide_scsi_probe,
510 .remove = ide_scsi_remove,
511 .version = IDESCSI_VERSION,
513 .supports_dsc_overlap = 0,
514 .do_request = idescsi_do_request,
515 .end_request = idescsi_end_request,
516 .error = idescsi_atapi_error,
517 #ifdef CONFIG_IDE_PROC_FS
518 .proc = idescsi_proc,
522 static int idescsi_ide_open(struct inode *inode, struct file *filp)
524 struct gendisk *disk = inode->i_bdev->bd_disk;
525 struct ide_scsi_obj *scsi;
527 if (!(scsi = ide_scsi_get(disk)))
533 static int idescsi_ide_release(struct inode *inode, struct file *filp)
535 struct gendisk *disk = inode->i_bdev->bd_disk;
536 struct ide_scsi_obj *scsi = ide_scsi_g(disk);
543 static int idescsi_ide_ioctl(struct inode *inode, struct file *file,
544 unsigned int cmd, unsigned long arg)
546 struct block_device *bdev = inode->i_bdev;
547 struct ide_scsi_obj *scsi = ide_scsi_g(bdev->bd_disk);
548 return generic_ide_ioctl(scsi->drive, file, bdev, cmd, arg);
551 static struct block_device_operations idescsi_ops = {
552 .owner = THIS_MODULE,
553 .open = idescsi_ide_open,
554 .release = idescsi_ide_release,
555 .ioctl = idescsi_ide_ioctl,
558 static int idescsi_slave_configure(struct scsi_device * sdp)
560 /* Configure detected device */
561 sdp->use_10_for_rw = 1;
562 sdp->use_10_for_ms = 1;
563 scsi_adjust_queue_depth(sdp, MSG_SIMPLE_TAG, sdp->host->cmd_per_lun);
567 static const char *idescsi_info (struct Scsi_Host *host)
569 return "SCSI host adapter emulation for IDE ATAPI devices";
572 static int idescsi_ioctl (struct scsi_device *dev, int cmd, void __user *arg)
574 idescsi_scsi_t *scsi = scsihost_to_idescsi(dev->host);
576 if (cmd == SG_SET_TRANSFORM) {
578 set_bit(IDESCSI_SG_TRANSFORM, &scsi->transform);
580 clear_bit(IDESCSI_SG_TRANSFORM, &scsi->transform);
582 } else if (cmd == SG_GET_TRANSFORM)
583 return put_user(test_bit(IDESCSI_SG_TRANSFORM, &scsi->transform), (int __user *) arg);
587 static int idescsi_queue (struct scsi_cmnd *cmd,
588 void (*done)(struct scsi_cmnd *))
590 struct Scsi_Host *host = cmd->device->host;
591 idescsi_scsi_t *scsi = scsihost_to_idescsi(host);
592 ide_drive_t *drive = scsi->drive;
593 struct request *rq = NULL;
594 struct ide_atapi_pc *pc = NULL;
597 scmd_printk (KERN_ERR, cmd, "drive not present\n");
600 scsi = drive_to_idescsi(drive);
601 pc = kmalloc(sizeof(struct ide_atapi_pc), GFP_ATOMIC);
602 rq = kmalloc(sizeof(struct request), GFP_ATOMIC);
603 if (rq == NULL || pc == NULL) {
604 printk (KERN_ERR "ide-scsi: %s: out of memory\n", drive->name);
608 memset (pc->c, 0, 12);
610 if (cmd->sc_data_direction == DMA_TO_DEVICE)
611 pc->flags |= PC_FLAG_WRITING;
613 memcpy (pc->c, cmd->cmnd, cmd->cmd_len);
615 pc->sg = scsi_sglist(cmd);
616 pc->sg_cnt = scsi_sg_count(cmd);
618 pc->req_xfer = pc->buf_size = scsi_bufflen(cmd);
621 pc->timeout = jiffies + cmd->timeout_per_command;
623 if (test_bit(IDESCSI_LOG_CMD, &scsi->log)) {
624 printk ("ide-scsi: %s: que %lu, cmd = ", drive->name, cmd->serial_number);
625 ide_scsi_hex_dump(cmd->cmnd, cmd->cmd_len);
626 if (memcmp(pc->c, cmd->cmnd, cmd->cmd_len)) {
627 printk ("ide-scsi: %s: que %lu, tsl = ", drive->name, cmd->serial_number);
628 ide_scsi_hex_dump(pc->c, 12);
632 blk_rq_init(NULL, rq);
633 rq->special = (char *) pc;
634 rq->cmd_type = REQ_TYPE_SPECIAL;
635 spin_unlock_irq(host->host_lock);
636 memcpy(rq->cmd, pc->c, 12);
637 blk_execute_rq_nowait(drive->queue, scsi->disk, rq, 0, NULL);
638 spin_lock_irq(host->host_lock);
643 cmd->result = DID_ERROR << 16;
648 static int idescsi_eh_abort (struct scsi_cmnd *cmd)
650 idescsi_scsi_t *scsi = scsihost_to_idescsi(cmd->device->host);
651 ide_drive_t *drive = scsi->drive;
655 /* In idescsi_eh_abort we try to gently pry our command from the ide subsystem */
657 if (test_bit(IDESCSI_LOG_CMD, &scsi->log))
658 printk (KERN_WARNING "ide-scsi: abort called for %lu\n", cmd->serial_number);
661 printk (KERN_WARNING "ide-scsi: Drive not set in idescsi_eh_abort\n");
666 /* First give it some more time, how much is "right" is hard to say :-( */
668 busy = ide_wait_not_busy(HWIF(drive), 100); /* FIXME - uses mdelay which causes latency? */
669 if (test_bit(IDESCSI_LOG_CMD, &scsi->log))
670 printk (KERN_WARNING "ide-scsi: drive did%s become ready\n", busy?" not":"");
672 spin_lock_irq(&ide_lock);
674 /* If there is no pc running we're done (our interrupt took care of it) */
680 /* It's somewhere in flight. Does ide subsystem agree? */
681 if (scsi->pc->scsi_cmd->serial_number == cmd->serial_number && !busy &&
682 elv_queue_empty(drive->queue) && HWGROUP(drive)->rq != scsi->pc->rq) {
684 * FIXME - not sure this condition can ever occur
686 printk (KERN_ERR "ide-scsi: cmd aborted!\n");
688 if (blk_sense_request(scsi->pc->rq))
689 kfree(scsi->pc->buf);
698 spin_unlock_irq(&ide_lock);
700 if (test_bit(IDESCSI_LOG_CMD, &scsi->log))
701 printk (KERN_WARNING "ide-scsi: abort returns %s\n", ret == SUCCESS?"success":"failed");
706 static int idescsi_eh_reset (struct scsi_cmnd *cmd)
709 idescsi_scsi_t *scsi = scsihost_to_idescsi(cmd->device->host);
710 ide_drive_t *drive = scsi->drive;
714 /* In idescsi_eh_reset we forcefully remove the command from the ide subsystem and reset the device. */
716 if (test_bit(IDESCSI_LOG_CMD, &scsi->log))
717 printk (KERN_WARNING "ide-scsi: reset called for %lu\n", cmd->serial_number);
720 printk (KERN_WARNING "ide-scsi: Drive not set in idescsi_eh_reset\n");
725 spin_lock_irq(cmd->device->host->host_lock);
726 spin_lock(&ide_lock);
728 if (!scsi->pc || (req = scsi->pc->rq) != HWGROUP(drive)->rq || !HWGROUP(drive)->handler) {
729 printk (KERN_WARNING "ide-scsi: No active request in idescsi_eh_reset\n");
730 spin_unlock(&ide_lock);
731 spin_unlock_irq(cmd->device->host->host_lock);
735 /* kill current request */
736 if (__blk_end_request(req, -EIO, 0))
738 if (blk_sense_request(req))
739 kfree(scsi->pc->buf);
744 /* now nuke the drive queue */
745 while ((req = elv_next_request(drive->queue))) {
746 if (__blk_end_request(req, -EIO, 0))
750 HWGROUP(drive)->rq = NULL;
751 HWGROUP(drive)->handler = NULL;
752 HWGROUP(drive)->busy = 1; /* will set this to zero when ide reset finished */
753 spin_unlock(&ide_lock);
757 /* ide_do_reset starts a polling handler which restarts itself every 50ms until the reset finishes */
760 spin_unlock_irq(cmd->device->host->host_lock);
762 spin_lock_irq(cmd->device->host->host_lock);
763 } while ( HWGROUP(drive)->handler );
765 ready = drive_is_ready(drive);
766 HWGROUP(drive)->busy--;
768 printk (KERN_ERR "ide-scsi: reset failed!\n");
772 spin_unlock_irq(cmd->device->host->host_lock);
776 static int idescsi_bios(struct scsi_device *sdev, struct block_device *bdev,
777 sector_t capacity, int *parm)
779 idescsi_scsi_t *idescsi = scsihost_to_idescsi(sdev->host);
780 ide_drive_t *drive = idescsi->drive;
782 if (drive->bios_cyl && drive->bios_head && drive->bios_sect) {
783 parm[0] = drive->bios_head;
784 parm[1] = drive->bios_sect;
785 parm[2] = drive->bios_cyl;
790 static struct scsi_host_template idescsi_template = {
791 .module = THIS_MODULE,
793 .info = idescsi_info,
794 .slave_configure = idescsi_slave_configure,
795 .ioctl = idescsi_ioctl,
796 .queuecommand = idescsi_queue,
797 .eh_abort_handler = idescsi_eh_abort,
798 .eh_host_reset_handler = idescsi_eh_reset,
799 .bios_param = idescsi_bios,
805 .use_clustering = DISABLE_CLUSTERING,
807 .proc_name = "ide-scsi",
810 static int ide_scsi_probe(ide_drive_t *drive)
812 idescsi_scsi_t *idescsi;
813 struct Scsi_Host *host;
818 if (!warned && drive->media == ide_cdrom) {
819 printk(KERN_WARNING "ide-scsi is deprecated for cd burning! Use ide-cd and give dev=/dev/hdX as device\n");
823 if (idescsi_nocd && drive->media == ide_cdrom)
826 if (!strstr("ide-scsi", drive->driver_req) ||
828 drive->media == ide_disk ||
829 !(host = scsi_host_alloc(&idescsi_template,sizeof(idescsi_scsi_t))))
834 g = alloc_disk(1 << PARTN_BITS);
838 ide_init_disk(g, drive);
842 if (drive->id->last_lun)
843 debug_log("%s: id->last_lun=%u\n", drive->name,
844 drive->id->last_lun);
846 if ((drive->id->last_lun & 0x7) != 7)
847 host->max_lun = (drive->id->last_lun & 0x7) + 1;
851 drive->driver_data = host;
852 idescsi = scsihost_to_idescsi(host);
853 idescsi->drive = drive;
854 idescsi->driver = &idescsi_driver;
855 idescsi->host = host;
857 g->private_data = &idescsi->driver;
858 ide_proc_register_driver(drive, &idescsi_driver);
860 idescsi_setup(drive, idescsi);
861 g->fops = &idescsi_ops;
862 ide_register_region(g);
863 err = scsi_add_host(host, &drive->gendev);
865 scsi_scan_host(host);
868 /* fall through on error */
869 ide_unregister_region(g);
870 ide_proc_unregister_driver(drive, &idescsi_driver);
879 static int __init init_idescsi_module(void)
881 return driver_register(&idescsi_driver.gen_driver);
884 static void __exit exit_idescsi_module(void)
886 driver_unregister(&idescsi_driver.gen_driver);
889 module_param(idescsi_nocd, int, 0600);
890 MODULE_PARM_DESC(idescsi_nocd, "Disable handling of CD-ROMs so they may be driven by ide-cd");
891 module_init(init_idescsi_module);
892 module_exit(exit_idescsi_module);
893 MODULE_LICENSE("GPL");