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 transform
; /* SCSI cmd translation layer */
88 unsigned long log
; /* log flags */
91 static DEFINE_MUTEX(idescsi_ref_mutex
);
92 /* Set by module param to skip cd */
93 static int idescsi_nocd
;
95 #define ide_scsi_g(disk) \
96 container_of((disk)->private_data, struct ide_scsi_obj, driver)
98 static struct ide_scsi_obj
*ide_scsi_get(struct gendisk
*disk
)
100 struct ide_scsi_obj
*scsi
= NULL
;
102 mutex_lock(&idescsi_ref_mutex
);
103 scsi
= ide_scsi_g(disk
);
105 scsi_host_get(scsi
->host
);
106 if (ide_device_get(scsi
->drive
)) {
107 scsi_host_put(scsi
->host
);
111 mutex_unlock(&idescsi_ref_mutex
);
115 static void ide_scsi_put(struct ide_scsi_obj
*scsi
)
117 mutex_lock(&idescsi_ref_mutex
);
118 ide_device_put(scsi
->drive
);
119 scsi_host_put(scsi
->host
);
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
) & (BUSY_STAT
| DRQ_STAT
))
248 hwif
->tp_ops
->exec_command(hwif
, WIN_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 static void idescsi_add_settings(ide_drive_t
*drive
)
434 idescsi_scsi_t
*scsi
= drive_to_idescsi(drive
);
437 * drive setting name read/write data type min max mul_factor div_factor data pointer set function
439 ide_add_setting(drive
, "bios_cyl", SETTING_RW
, TYPE_INT
, 0, 1023, 1, 1, &drive
->bios_cyl
, NULL
);
440 ide_add_setting(drive
, "bios_head", SETTING_RW
, TYPE_BYTE
, 0, 255, 1, 1, &drive
->bios_head
, NULL
);
441 ide_add_setting(drive
, "bios_sect", SETTING_RW
, TYPE_BYTE
, 0, 63, 1, 1, &drive
->bios_sect
, NULL
);
442 ide_add_setting(drive
, "transform", SETTING_RW
, TYPE_INT
, 0, 3, 1, 1, &scsi
->transform
, NULL
);
443 ide_add_setting(drive
, "log", SETTING_RW
, TYPE_INT
, 0, 1, 1, 1, &scsi
->log
, NULL
);
446 static inline void idescsi_add_settings(ide_drive_t
*drive
) { ; }
450 * Driver initialization.
452 static void idescsi_setup (ide_drive_t
*drive
, idescsi_scsi_t
*scsi
)
454 if (drive
->id
&& (drive
->id
->config
& 0x0060) == 0x20)
455 set_bit(IDE_AFLAG_DRQ_INTERRUPT
, &drive
->atapi_flags
);
456 clear_bit(IDESCSI_SG_TRANSFORM
, &scsi
->transform
);
457 #if IDESCSI_DEBUG_LOG
458 set_bit(IDESCSI_LOG_CMD
, &scsi
->log
);
459 #endif /* IDESCSI_DEBUG_LOG */
461 drive
->pc_callback
= ide_scsi_callback
;
463 idescsi_add_settings(drive
);
466 static void ide_scsi_remove(ide_drive_t
*drive
)
468 struct Scsi_Host
*scsihost
= drive
->driver_data
;
469 struct ide_scsi_obj
*scsi
= scsihost_to_idescsi(scsihost
);
470 struct gendisk
*g
= scsi
->disk
;
472 scsi_remove_host(scsihost
);
473 ide_proc_unregister_driver(drive
, scsi
->driver
);
475 ide_unregister_region(g
);
477 drive
->driver_data
= NULL
;
478 g
->private_data
= NULL
;
486 static int ide_scsi_probe(ide_drive_t
*);
488 #ifdef CONFIG_IDE_PROC_FS
489 static ide_proc_entry_t idescsi_proc
[] = {
490 { "capacity", S_IFREG
|S_IRUGO
, proc_ide_read_capacity
, NULL
},
491 { NULL
, 0, NULL
, NULL
}
495 static ide_driver_t idescsi_driver
= {
497 .owner
= THIS_MODULE
,
499 .bus
= &ide_bus_type
,
501 .probe
= ide_scsi_probe
,
502 .remove
= ide_scsi_remove
,
503 .version
= IDESCSI_VERSION
,
505 .supports_dsc_overlap
= 0,
506 .do_request
= idescsi_do_request
,
507 .end_request
= idescsi_end_request
,
508 .error
= idescsi_atapi_error
,
509 #ifdef CONFIG_IDE_PROC_FS
510 .proc
= idescsi_proc
,
514 static int idescsi_ide_open(struct inode
*inode
, struct file
*filp
)
516 struct gendisk
*disk
= inode
->i_bdev
->bd_disk
;
517 struct ide_scsi_obj
*scsi
;
519 if (!(scsi
= ide_scsi_get(disk
)))
525 static int idescsi_ide_release(struct inode
*inode
, struct file
*filp
)
527 struct gendisk
*disk
= inode
->i_bdev
->bd_disk
;
528 struct ide_scsi_obj
*scsi
= ide_scsi_g(disk
);
535 static int idescsi_ide_ioctl(struct inode
*inode
, struct file
*file
,
536 unsigned int cmd
, unsigned long arg
)
538 struct block_device
*bdev
= inode
->i_bdev
;
539 struct ide_scsi_obj
*scsi
= ide_scsi_g(bdev
->bd_disk
);
540 return generic_ide_ioctl(scsi
->drive
, file
, bdev
, cmd
, arg
);
543 static struct block_device_operations idescsi_ops
= {
544 .owner
= THIS_MODULE
,
545 .open
= idescsi_ide_open
,
546 .release
= idescsi_ide_release
,
547 .ioctl
= idescsi_ide_ioctl
,
550 static int idescsi_slave_configure(struct scsi_device
* sdp
)
552 /* Configure detected device */
553 sdp
->use_10_for_rw
= 1;
554 sdp
->use_10_for_ms
= 1;
555 scsi_adjust_queue_depth(sdp
, MSG_SIMPLE_TAG
, sdp
->host
->cmd_per_lun
);
559 static const char *idescsi_info (struct Scsi_Host
*host
)
561 return "SCSI host adapter emulation for IDE ATAPI devices";
564 static int idescsi_ioctl (struct scsi_device
*dev
, int cmd
, void __user
*arg
)
566 idescsi_scsi_t
*scsi
= scsihost_to_idescsi(dev
->host
);
568 if (cmd
== SG_SET_TRANSFORM
) {
570 set_bit(IDESCSI_SG_TRANSFORM
, &scsi
->transform
);
572 clear_bit(IDESCSI_SG_TRANSFORM
, &scsi
->transform
);
574 } else if (cmd
== SG_GET_TRANSFORM
)
575 return put_user(test_bit(IDESCSI_SG_TRANSFORM
, &scsi
->transform
), (int __user
*) arg
);
579 static int idescsi_queue (struct scsi_cmnd
*cmd
,
580 void (*done
)(struct scsi_cmnd
*))
582 struct Scsi_Host
*host
= cmd
->device
->host
;
583 idescsi_scsi_t
*scsi
= scsihost_to_idescsi(host
);
584 ide_drive_t
*drive
= scsi
->drive
;
585 struct request
*rq
= NULL
;
586 struct ide_atapi_pc
*pc
= NULL
;
587 int write
= cmd
->sc_data_direction
== DMA_TO_DEVICE
;
590 scmd_printk (KERN_ERR
, cmd
, "drive not present\n");
593 scsi
= drive_to_idescsi(drive
);
594 pc
= kmalloc(sizeof(struct ide_atapi_pc
), GFP_ATOMIC
);
595 rq
= blk_get_request(drive
->queue
, write
, GFP_ATOMIC
);
596 if (rq
== NULL
|| pc
== NULL
) {
597 printk (KERN_ERR
"ide-scsi: %s: out of memory\n", drive
->name
);
601 memset (pc
->c
, 0, 12);
603 if (cmd
->sc_data_direction
== DMA_TO_DEVICE
)
604 pc
->flags
|= PC_FLAG_WRITING
;
606 memcpy (pc
->c
, cmd
->cmnd
, cmd
->cmd_len
);
608 pc
->sg
= scsi_sglist(cmd
);
609 pc
->sg_cnt
= scsi_sg_count(cmd
);
611 pc
->req_xfer
= pc
->buf_size
= scsi_bufflen(cmd
);
614 pc
->timeout
= jiffies
+ cmd
->timeout_per_command
;
616 if (test_bit(IDESCSI_LOG_CMD
, &scsi
->log
)) {
617 printk ("ide-scsi: %s: que %lu, cmd = ", drive
->name
, cmd
->serial_number
);
618 ide_scsi_hex_dump(cmd
->cmnd
, cmd
->cmd_len
);
619 if (memcmp(pc
->c
, cmd
->cmnd
, cmd
->cmd_len
)) {
620 printk ("ide-scsi: %s: que %lu, tsl = ", drive
->name
, cmd
->serial_number
);
621 ide_scsi_hex_dump(pc
->c
, 12);
625 rq
->special
= (char *) pc
;
626 rq
->cmd_type
= REQ_TYPE_SPECIAL
;
627 spin_unlock_irq(host
->host_lock
);
629 memcpy(rq
->cmd
, pc
->c
, 12);
630 blk_execute_rq_nowait(drive
->queue
, scsi
->disk
, rq
, 0, NULL
);
631 spin_lock_irq(host
->host_lock
);
637 cmd
->result
= DID_ERROR
<< 16;
642 static int idescsi_eh_abort (struct scsi_cmnd
*cmd
)
644 idescsi_scsi_t
*scsi
= scsihost_to_idescsi(cmd
->device
->host
);
645 ide_drive_t
*drive
= scsi
->drive
;
649 /* In idescsi_eh_abort we try to gently pry our command from the ide subsystem */
651 if (test_bit(IDESCSI_LOG_CMD
, &scsi
->log
))
652 printk (KERN_WARNING
"ide-scsi: abort called for %lu\n", cmd
->serial_number
);
655 printk (KERN_WARNING
"ide-scsi: Drive not set in idescsi_eh_abort\n");
660 /* First give it some more time, how much is "right" is hard to say :-( */
662 busy
= ide_wait_not_busy(HWIF(drive
), 100); /* FIXME - uses mdelay which causes latency? */
663 if (test_bit(IDESCSI_LOG_CMD
, &scsi
->log
))
664 printk (KERN_WARNING
"ide-scsi: drive did%s become ready\n", busy
?" not":"");
666 spin_lock_irq(&ide_lock
);
668 /* If there is no pc running we're done (our interrupt took care of it) */
674 /* It's somewhere in flight. Does ide subsystem agree? */
675 if (scsi
->pc
->scsi_cmd
->serial_number
== cmd
->serial_number
&& !busy
&&
676 elv_queue_empty(drive
->queue
) && HWGROUP(drive
)->rq
!= scsi
->pc
->rq
) {
678 * FIXME - not sure this condition can ever occur
680 printk (KERN_ERR
"ide-scsi: cmd aborted!\n");
682 if (blk_sense_request(scsi
->pc
->rq
))
683 kfree(scsi
->pc
->buf
);
684 /* we need to call blk_put_request twice. */
685 blk_put_request(scsi
->pc
->rq
);
686 blk_put_request(scsi
->pc
->rq
);
694 spin_unlock_irq(&ide_lock
);
696 if (test_bit(IDESCSI_LOG_CMD
, &scsi
->log
))
697 printk (KERN_WARNING
"ide-scsi: abort returns %s\n", ret
== SUCCESS
?"success":"failed");
702 static int idescsi_eh_reset (struct scsi_cmnd
*cmd
)
705 idescsi_scsi_t
*scsi
= scsihost_to_idescsi(cmd
->device
->host
);
706 ide_drive_t
*drive
= scsi
->drive
;
710 /* In idescsi_eh_reset we forcefully remove the command from the ide subsystem and reset the device. */
712 if (test_bit(IDESCSI_LOG_CMD
, &scsi
->log
))
713 printk (KERN_WARNING
"ide-scsi: reset called for %lu\n", cmd
->serial_number
);
716 printk (KERN_WARNING
"ide-scsi: Drive not set in idescsi_eh_reset\n");
721 spin_lock_irq(cmd
->device
->host
->host_lock
);
722 spin_lock(&ide_lock
);
724 if (!scsi
->pc
|| (req
= scsi
->pc
->rq
) != HWGROUP(drive
)->rq
|| !HWGROUP(drive
)->handler
) {
725 printk (KERN_WARNING
"ide-scsi: No active request in idescsi_eh_reset\n");
726 spin_unlock(&ide_lock
);
727 spin_unlock_irq(cmd
->device
->host
->host_lock
);
731 /* kill current request */
732 if (__blk_end_request(req
, -EIO
, 0))
734 if (blk_sense_request(req
))
735 kfree(scsi
->pc
->buf
);
738 blk_put_request(req
);
740 /* now nuke the drive queue */
741 while ((req
= elv_next_request(drive
->queue
))) {
742 if (__blk_end_request(req
, -EIO
, 0))
746 HWGROUP(drive
)->rq
= NULL
;
747 HWGROUP(drive
)->handler
= NULL
;
748 HWGROUP(drive
)->busy
= 1; /* will set this to zero when ide reset finished */
749 spin_unlock(&ide_lock
);
753 /* ide_do_reset starts a polling handler which restarts itself every 50ms until the reset finishes */
756 spin_unlock_irq(cmd
->device
->host
->host_lock
);
758 spin_lock_irq(cmd
->device
->host
->host_lock
);
759 } while ( HWGROUP(drive
)->handler
);
761 ready
= drive_is_ready(drive
);
762 HWGROUP(drive
)->busy
--;
764 printk (KERN_ERR
"ide-scsi: reset failed!\n");
768 spin_unlock_irq(cmd
->device
->host
->host_lock
);
772 static int idescsi_bios(struct scsi_device
*sdev
, struct block_device
*bdev
,
773 sector_t capacity
, int *parm
)
775 idescsi_scsi_t
*idescsi
= scsihost_to_idescsi(sdev
->host
);
776 ide_drive_t
*drive
= idescsi
->drive
;
778 if (drive
->bios_cyl
&& drive
->bios_head
&& drive
->bios_sect
) {
779 parm
[0] = drive
->bios_head
;
780 parm
[1] = drive
->bios_sect
;
781 parm
[2] = drive
->bios_cyl
;
786 static struct scsi_host_template idescsi_template
= {
787 .module
= THIS_MODULE
,
789 .info
= idescsi_info
,
790 .slave_configure
= idescsi_slave_configure
,
791 .ioctl
= idescsi_ioctl
,
792 .queuecommand
= idescsi_queue
,
793 .eh_abort_handler
= idescsi_eh_abort
,
794 .eh_host_reset_handler
= idescsi_eh_reset
,
795 .bios_param
= idescsi_bios
,
801 .use_clustering
= DISABLE_CLUSTERING
,
803 .proc_name
= "ide-scsi",
806 static int ide_scsi_probe(ide_drive_t
*drive
)
808 idescsi_scsi_t
*idescsi
;
809 struct Scsi_Host
*host
;
814 if (!warned
&& drive
->media
== ide_cdrom
) {
815 printk(KERN_WARNING
"ide-scsi is deprecated for cd burning! Use ide-cd and give dev=/dev/hdX as device\n");
819 if (idescsi_nocd
&& drive
->media
== ide_cdrom
)
822 if (!strstr("ide-scsi", drive
->driver_req
) ||
824 drive
->media
== ide_disk
||
825 !(host
= scsi_host_alloc(&idescsi_template
,sizeof(idescsi_scsi_t
))))
830 g
= alloc_disk(1 << PARTN_BITS
);
834 ide_init_disk(g
, drive
);
838 if (drive
->id
->last_lun
)
839 debug_log("%s: id->last_lun=%u\n", drive
->name
,
840 drive
->id
->last_lun
);
842 if ((drive
->id
->last_lun
& 0x7) != 7)
843 host
->max_lun
= (drive
->id
->last_lun
& 0x7) + 1;
847 drive
->driver_data
= host
;
848 idescsi
= scsihost_to_idescsi(host
);
849 idescsi
->drive
= drive
;
850 idescsi
->driver
= &idescsi_driver
;
851 idescsi
->host
= host
;
853 g
->private_data
= &idescsi
->driver
;
854 ide_proc_register_driver(drive
, &idescsi_driver
);
856 idescsi_setup(drive
, idescsi
);
857 g
->fops
= &idescsi_ops
;
858 ide_register_region(g
);
859 err
= scsi_add_host(host
, &drive
->gendev
);
861 scsi_scan_host(host
);
864 /* fall through on error */
865 ide_unregister_region(g
);
866 ide_proc_unregister_driver(drive
, &idescsi_driver
);
875 static int __init
init_idescsi_module(void)
877 return driver_register(&idescsi_driver
.gen_driver
);
880 static void __exit
exit_idescsi_module(void)
882 driver_unregister(&idescsi_driver
.gen_driver
);
885 module_param(idescsi_nocd
, int, 0600);
886 MODULE_PARM_DESC(idescsi_nocd
, "Disable handling of CD-ROMs so they may be driven by ide-cd");
887 module_init(init_idescsi_module
);
888 module_exit(exit_idescsi_module
);
889 MODULE_LICENSE("GPL");