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 xfer_func_t
*xf
= write
? hwif
->output_data
: hwif
->input_data
;
150 count
= min(pc
->sg
->length
- pc
->b_count
, bcount
);
151 if (PageHighMem(sg_page(pc
->sg
))) {
154 local_irq_save(flags
);
155 buf
= kmap_atomic(sg_page(pc
->sg
), KM_IRQ0
) +
157 xf(drive
, NULL
, buf
+ pc
->b_count
, count
);
158 kunmap_atomic(buf
- pc
->sg
->offset
, KM_IRQ0
);
159 local_irq_restore(flags
);
161 buf
= sg_virt(pc
->sg
);
162 xf(drive
, NULL
, buf
+ pc
->b_count
, count
);
164 bcount
-= count
; pc
->b_count
+= count
;
165 if (pc
->b_count
== pc
->sg
->length
) {
168 pc
->sg
= sg_next(pc
->sg
);
174 printk(KERN_ERR
"%s: scatter gather table too small, %s\n",
175 drive
->name
, write
? "padding with zeros"
176 : "discarding data");
177 ide_pad_transfer(drive
, write
, bcount
);
181 static void ide_scsi_hex_dump(u8
*data
, int len
)
183 print_hex_dump(KERN_CONT
, "", DUMP_PREFIX_NONE
, 16, 1, data
, len
, 0);
186 static int idescsi_check_condition(ide_drive_t
*drive
,
187 struct request
*failed_cmd
)
189 idescsi_scsi_t
*scsi
= drive_to_idescsi(drive
);
190 struct ide_atapi_pc
*pc
;
194 /* stuff a sense request in front of our current request */
195 pc
= kzalloc(sizeof(struct ide_atapi_pc
), GFP_ATOMIC
);
196 rq
= kmalloc(sizeof(struct request
), GFP_ATOMIC
);
197 buf
= kzalloc(SCSI_SENSE_BUFFERSIZE
, GFP_ATOMIC
);
198 if (!pc
|| !rq
|| !buf
) {
204 blk_rq_init(NULL
, rq
);
205 rq
->special
= (char *) pc
;
208 pc
->c
[0] = REQUEST_SENSE
;
209 pc
->c
[4] = pc
->req_xfer
= pc
->buf_size
= SCSI_SENSE_BUFFERSIZE
;
210 rq
->cmd_type
= REQ_TYPE_SENSE
;
211 rq
->cmd_flags
|= REQ_PREEMPT
;
212 pc
->timeout
= jiffies
+ WAIT_READY
;
213 /* NOTE! Save the failed packet command in "rq->buffer" */
214 rq
->buffer
= (void *) failed_cmd
->special
;
215 pc
->scsi_cmd
= ((struct ide_atapi_pc
*) failed_cmd
->special
)->scsi_cmd
;
216 if (test_bit(IDESCSI_LOG_CMD
, &scsi
->log
)) {
217 printk ("ide-scsi: %s: queue cmd = ", drive
->name
);
218 ide_scsi_hex_dump(pc
->c
, 6);
220 rq
->rq_disk
= scsi
->disk
;
221 ide_do_drive_cmd(drive
, rq
);
225 static int idescsi_end_request(ide_drive_t
*, int, int);
227 static ide_startstop_t
228 idescsi_atapi_error(ide_drive_t
*drive
, struct request
*rq
, u8 stat
, u8 err
)
230 ide_hwif_t
*hwif
= drive
->hwif
;
232 if (ide_read_status(drive
) & (BUSY_STAT
| DRQ_STAT
))
234 hwif
->OUTBSYNC(hwif
, WIN_IDLEIMMEDIATE
,
235 hwif
->io_ports
.command_addr
);
239 idescsi_end_request(drive
, 0, 0);
244 static ide_startstop_t
245 idescsi_atapi_abort(ide_drive_t
*drive
, struct request
*rq
)
247 debug_log("%s called for %lu\n", __func__
,
248 ((struct ide_atapi_pc
*) rq
->special
)->scsi_cmd
->serial_number
);
250 rq
->errors
|= ERROR_MAX
;
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 ide_hwif_t
*hwif
= drive
->hwif
;
343 struct ide_atapi_pc
*pc
= scsi
->pc
;
344 struct request
*rq
= pc
->rq
;
345 xfer_func_t
*xferfunc
;
350 debug_log("Reached %s interrupt handler\n", __func__
);
352 if (pc
->flags
& PC_FLAG_TIMEDOUT
) {
353 debug_log("%s: got timed out packet %lu at %lu\n", __func__
,
354 pc
->scsi_cmd
->serial_number
, jiffies
);
355 /* end this request now - scsi should retry it*/
356 idescsi_end_request (drive
, 1, 0);
359 if (pc
->flags
& PC_FLAG_DMA_IN_PROGRESS
) {
360 if (hwif
->dma_ops
->dma_end(drive
))
361 pc
->flags
|= PC_FLAG_DMA_ERROR
;
363 pc
->xferred
= pc
->req_xfer
;
364 debug_log("%s: DMA finished\n", drive
->name
);
367 /* Clear the interrupt */
368 stat
= ide_read_status(drive
);
370 if ((stat
& DRQ_STAT
) == 0) {
371 /* No more interrupts */
372 if (test_bit(IDESCSI_LOG_CMD
, &scsi
->log
))
373 printk(KERN_INFO
"Packet command completed, %d bytes"
374 " transferred\n", pc
->xferred
);
375 pc
->flags
&= ~PC_FLAG_DMA_IN_PROGRESS
;
376 local_irq_enable_in_hardirq();
377 if ((stat
& ERR_STAT
) || (pc
->flags
& PC_FLAG_DMA_ERROR
))
379 idescsi_end_request (drive
, 1, 0);
382 if (pc
->flags
& PC_FLAG_DMA_IN_PROGRESS
) {
383 pc
->flags
&= ~PC_FLAG_DMA_IN_PROGRESS
;
384 printk(KERN_ERR
"%s: The device wants to issue more interrupts "
385 "in DMA mode\n", drive
->name
);
387 return ide_do_reset(drive
);
389 bcount
= (hwif
->INB(hwif
->io_ports
.lbah_addr
) << 8) |
390 hwif
->INB(hwif
->io_ports
.lbam_addr
);
391 ireason
= hwif
->INB(hwif
->io_ports
.nsect_addr
);
394 printk(KERN_ERR
"%s: CoD != 0 in %s\n", drive
->name
, __func__
);
395 return ide_do_reset (drive
);
397 if (((ireason
& IO
) == IO
) == !!(pc
->flags
& PC_FLAG_WRITING
)) {
398 /* Hopefully, we will never get here */
399 printk(KERN_ERR
"%s: We wanted to %s, but the device wants us "
400 "to %s!\n", drive
->name
,
401 (ireason
& IO
) ? "Write" : "Read",
402 (ireason
& IO
) ? "Read" : "Write");
403 return ide_do_reset(drive
);
405 if (!(pc
->flags
& PC_FLAG_WRITING
)) {
406 temp
= pc
->xferred
+ bcount
;
407 if (temp
> pc
->req_xfer
) {
408 if (temp
> pc
->buf_size
) {
409 printk(KERN_ERR
"%s: The device wants to send "
410 "us more data than expected - "
413 temp
= pc
->buf_size
- pc
->xferred
;
416 ide_scsi_io_buffers(drive
, pc
,
419 hwif
->input_data(drive
, NULL
,
421 printk(KERN_ERR
"%s: transferred %d of "
428 ide_pad_transfer(drive
, 0, bcount
- temp
);
429 ide_set_handler(drive
, &idescsi_pc_intr
, get_timeout(pc
), idescsi_expiry
);
432 debug_log("The device wants to send us more data than "
433 "expected - allowing transfer\n");
435 xferfunc
= hwif
->input_data
;
437 xferfunc
= hwif
->output_data
;
440 ide_scsi_io_buffers(drive
, pc
, bcount
,
441 !!(pc
->flags
& PC_FLAG_WRITING
));
443 xferfunc(drive
, NULL
, pc
->cur_pos
, bcount
);
445 /* Update the current position */
446 pc
->xferred
+= bcount
;
447 pc
->cur_pos
+= bcount
;
449 /* And set the interrupt handler again */
450 ide_set_handler(drive
, &idescsi_pc_intr
, get_timeout(pc
), idescsi_expiry
);
454 static ide_startstop_t
idescsi_transfer_pc(ide_drive_t
*drive
)
456 idescsi_scsi_t
*scsi
= drive_to_idescsi(drive
);
458 return ide_transfer_pc(drive
, scsi
->pc
, idescsi_pc_intr
,
459 get_timeout(scsi
->pc
), idescsi_expiry
);
462 static inline int idescsi_set_direction(struct ide_atapi_pc
*pc
)
465 case READ_6
: case READ_10
: case READ_12
:
466 pc
->flags
&= ~PC_FLAG_WRITING
;
468 case WRITE_6
: case WRITE_10
: case WRITE_12
:
469 pc
->flags
|= PC_FLAG_WRITING
;
476 static int idescsi_map_sg(ide_drive_t
*drive
, struct ide_atapi_pc
*pc
)
478 ide_hwif_t
*hwif
= drive
->hwif
;
479 struct scatterlist
*sg
, *scsi_sg
;
482 if (!pc
->req_xfer
|| pc
->req_xfer
% 1024)
485 if (idescsi_set_direction(pc
))
489 scsi_sg
= scsi_sglist(pc
->scsi_cmd
);
490 segments
= scsi_sg_count(pc
->scsi_cmd
);
492 if (segments
> hwif
->sg_max_nents
)
495 hwif
->sg_nents
= segments
;
496 memcpy(sg
, scsi_sg
, sizeof(*sg
) * segments
);
501 static ide_startstop_t
idescsi_issue_pc(ide_drive_t
*drive
,
502 struct ide_atapi_pc
*pc
)
504 idescsi_scsi_t
*scsi
= drive_to_idescsi(drive
);
505 ide_hwif_t
*hwif
= drive
->hwif
;
509 /* Set the current packet command */
511 /* We haven't transferred any data yet */
513 pc
->cur_pos
= pc
->buf
;
514 /* Request to transfer the entire buffer at once */
515 bcount
= min(pc
->req_xfer
, 63 * 1024);
517 if ((pc
->flags
& PC_FLAG_DMA_OK
) && drive
->using_dma
) {
519 dma
= !hwif
->dma_ops
->dma_setup(drive
);
524 pc
->flags
&= ~PC_FLAG_DMA_OK
;
526 ide_pktcmd_tf_load(drive
, 0, bcount
, dma
);
528 if (pc
->flags
& PC_FLAG_DRQ_INTERRUPT
) {
529 ide_execute_command(drive
, WIN_PACKETCMD
, &idescsi_transfer_pc
,
530 get_timeout(pc
), idescsi_expiry
);
533 /* Issue the packet command */
534 ide_execute_pkt_cmd(drive
);
535 return idescsi_transfer_pc(drive
);
540 * idescsi_do_request is our request handling function.
542 static ide_startstop_t
idescsi_do_request (ide_drive_t
*drive
, struct request
*rq
, sector_t block
)
544 debug_log("dev: %s, cmd: %x, errors: %d\n", rq
->rq_disk
->disk_name
,
545 rq
->cmd
[0], rq
->errors
);
546 debug_log("sector: %ld, nr_sectors: %ld, current_nr_sectors: %d\n",
547 rq
->sector
, rq
->nr_sectors
, rq
->current_nr_sectors
);
549 if (blk_sense_request(rq
) || blk_special_request(rq
)) {
550 struct ide_atapi_pc
*pc
= (struct ide_atapi_pc
*)rq
->special
;
551 idescsi_scsi_t
*scsi
= drive_to_idescsi(drive
);
553 if (test_bit(IDESCSI_DRQ_INTERRUPT
, &scsi
->flags
))
554 pc
->flags
|= PC_FLAG_DRQ_INTERRUPT
;
556 if (drive
->using_dma
&& !idescsi_map_sg(drive
, pc
))
557 pc
->flags
|= PC_FLAG_DMA_OK
;
559 return idescsi_issue_pc(drive
, pc
);
561 blk_dump_rq_flags(rq
, "ide-scsi: unsup command");
562 idescsi_end_request (drive
, 0, 0);
566 #ifdef CONFIG_IDE_PROC_FS
567 static void idescsi_add_settings(ide_drive_t
*drive
)
569 idescsi_scsi_t
*scsi
= drive_to_idescsi(drive
);
572 * drive setting name read/write data type min max mul_factor div_factor data pointer set function
574 ide_add_setting(drive
, "bios_cyl", SETTING_RW
, TYPE_INT
, 0, 1023, 1, 1, &drive
->bios_cyl
, NULL
);
575 ide_add_setting(drive
, "bios_head", SETTING_RW
, TYPE_BYTE
, 0, 255, 1, 1, &drive
->bios_head
, NULL
);
576 ide_add_setting(drive
, "bios_sect", SETTING_RW
, TYPE_BYTE
, 0, 63, 1, 1, &drive
->bios_sect
, NULL
);
577 ide_add_setting(drive
, "transform", SETTING_RW
, TYPE_INT
, 0, 3, 1, 1, &scsi
->transform
, NULL
);
578 ide_add_setting(drive
, "log", SETTING_RW
, TYPE_INT
, 0, 1, 1, 1, &scsi
->log
, NULL
);
581 static inline void idescsi_add_settings(ide_drive_t
*drive
) { ; }
585 * Driver initialization.
587 static void idescsi_setup (ide_drive_t
*drive
, idescsi_scsi_t
*scsi
)
589 if (drive
->id
&& (drive
->id
->config
& 0x0060) == 0x20)
590 set_bit (IDESCSI_DRQ_INTERRUPT
, &scsi
->flags
);
591 clear_bit(IDESCSI_SG_TRANSFORM
, &scsi
->transform
);
592 #if IDESCSI_DEBUG_LOG
593 set_bit(IDESCSI_LOG_CMD
, &scsi
->log
);
594 #endif /* IDESCSI_DEBUG_LOG */
595 idescsi_add_settings(drive
);
598 static void ide_scsi_remove(ide_drive_t
*drive
)
600 struct Scsi_Host
*scsihost
= drive
->driver_data
;
601 struct ide_scsi_obj
*scsi
= scsihost_to_idescsi(scsihost
);
602 struct gendisk
*g
= scsi
->disk
;
604 scsi_remove_host(scsihost
);
605 ide_proc_unregister_driver(drive
, scsi
->driver
);
607 ide_unregister_region(g
);
609 drive
->driver_data
= NULL
;
610 g
->private_data
= NULL
;
618 static int ide_scsi_probe(ide_drive_t
*);
620 #ifdef CONFIG_IDE_PROC_FS
621 static ide_proc_entry_t idescsi_proc
[] = {
622 { "capacity", S_IFREG
|S_IRUGO
, proc_ide_read_capacity
, NULL
},
623 { NULL
, 0, NULL
, NULL
}
627 static ide_driver_t idescsi_driver
= {
629 .owner
= THIS_MODULE
,
631 .bus
= &ide_bus_type
,
633 .probe
= ide_scsi_probe
,
634 .remove
= ide_scsi_remove
,
635 .version
= IDESCSI_VERSION
,
637 .supports_dsc_overlap
= 0,
638 .do_request
= idescsi_do_request
,
639 .end_request
= idescsi_end_request
,
640 .error
= idescsi_atapi_error
,
641 .abort
= idescsi_atapi_abort
,
642 #ifdef CONFIG_IDE_PROC_FS
643 .proc
= idescsi_proc
,
647 static int idescsi_ide_open(struct inode
*inode
, struct file
*filp
)
649 struct gendisk
*disk
= inode
->i_bdev
->bd_disk
;
650 struct ide_scsi_obj
*scsi
;
652 if (!(scsi
= ide_scsi_get(disk
)))
658 static int idescsi_ide_release(struct inode
*inode
, struct file
*filp
)
660 struct gendisk
*disk
= inode
->i_bdev
->bd_disk
;
661 struct ide_scsi_obj
*scsi
= ide_scsi_g(disk
);
668 static int idescsi_ide_ioctl(struct inode
*inode
, struct file
*file
,
669 unsigned int cmd
, unsigned long arg
)
671 struct block_device
*bdev
= inode
->i_bdev
;
672 struct ide_scsi_obj
*scsi
= ide_scsi_g(bdev
->bd_disk
);
673 return generic_ide_ioctl(scsi
->drive
, file
, bdev
, cmd
, arg
);
676 static struct block_device_operations idescsi_ops
= {
677 .owner
= THIS_MODULE
,
678 .open
= idescsi_ide_open
,
679 .release
= idescsi_ide_release
,
680 .ioctl
= idescsi_ide_ioctl
,
683 static int idescsi_slave_configure(struct scsi_device
* sdp
)
685 /* Configure detected device */
686 sdp
->use_10_for_rw
= 1;
687 sdp
->use_10_for_ms
= 1;
688 scsi_adjust_queue_depth(sdp
, MSG_SIMPLE_TAG
, sdp
->host
->cmd_per_lun
);
692 static const char *idescsi_info (struct Scsi_Host
*host
)
694 return "SCSI host adapter emulation for IDE ATAPI devices";
697 static int idescsi_ioctl (struct scsi_device
*dev
, int cmd
, void __user
*arg
)
699 idescsi_scsi_t
*scsi
= scsihost_to_idescsi(dev
->host
);
701 if (cmd
== SG_SET_TRANSFORM
) {
703 set_bit(IDESCSI_SG_TRANSFORM
, &scsi
->transform
);
705 clear_bit(IDESCSI_SG_TRANSFORM
, &scsi
->transform
);
707 } else if (cmd
== SG_GET_TRANSFORM
)
708 return put_user(test_bit(IDESCSI_SG_TRANSFORM
, &scsi
->transform
), (int __user
*) arg
);
712 static int idescsi_queue (struct scsi_cmnd
*cmd
,
713 void (*done
)(struct scsi_cmnd
*))
715 struct Scsi_Host
*host
= cmd
->device
->host
;
716 idescsi_scsi_t
*scsi
= scsihost_to_idescsi(host
);
717 ide_drive_t
*drive
= scsi
->drive
;
718 struct request
*rq
= NULL
;
719 struct ide_atapi_pc
*pc
= NULL
;
722 scmd_printk (KERN_ERR
, cmd
, "drive not present\n");
725 scsi
= drive_to_idescsi(drive
);
726 pc
= kmalloc(sizeof(struct ide_atapi_pc
), GFP_ATOMIC
);
727 rq
= kmalloc(sizeof(struct request
), GFP_ATOMIC
);
728 if (rq
== NULL
|| pc
== NULL
) {
729 printk (KERN_ERR
"ide-scsi: %s: out of memory\n", drive
->name
);
733 memset (pc
->c
, 0, 12);
735 if (cmd
->sc_data_direction
== DMA_TO_DEVICE
)
736 pc
->flags
|= PC_FLAG_WRITING
;
738 memcpy (pc
->c
, cmd
->cmnd
, cmd
->cmd_len
);
740 pc
->sg
= scsi_sglist(cmd
);
741 pc
->sg_cnt
= scsi_sg_count(cmd
);
743 pc
->req_xfer
= pc
->buf_size
= scsi_bufflen(cmd
);
746 pc
->timeout
= jiffies
+ cmd
->timeout_per_command
;
748 if (test_bit(IDESCSI_LOG_CMD
, &scsi
->log
)) {
749 printk ("ide-scsi: %s: que %lu, cmd = ", drive
->name
, cmd
->serial_number
);
750 ide_scsi_hex_dump(cmd
->cmnd
, cmd
->cmd_len
);
751 if (memcmp(pc
->c
, cmd
->cmnd
, cmd
->cmd_len
)) {
752 printk ("ide-scsi: %s: que %lu, tsl = ", drive
->name
, cmd
->serial_number
);
753 ide_scsi_hex_dump(pc
->c
, 12);
757 blk_rq_init(NULL
, rq
);
758 rq
->special
= (char *) pc
;
759 rq
->cmd_type
= REQ_TYPE_SPECIAL
;
760 spin_unlock_irq(host
->host_lock
);
761 blk_execute_rq_nowait(drive
->queue
, scsi
->disk
, rq
, 0, NULL
);
762 spin_lock_irq(host
->host_lock
);
767 cmd
->result
= DID_ERROR
<< 16;
772 static int idescsi_eh_abort (struct scsi_cmnd
*cmd
)
774 idescsi_scsi_t
*scsi
= scsihost_to_idescsi(cmd
->device
->host
);
775 ide_drive_t
*drive
= scsi
->drive
;
779 /* In idescsi_eh_abort we try to gently pry our command from the ide subsystem */
781 if (test_bit(IDESCSI_LOG_CMD
, &scsi
->log
))
782 printk (KERN_WARNING
"ide-scsi: abort called for %lu\n", cmd
->serial_number
);
785 printk (KERN_WARNING
"ide-scsi: Drive not set in idescsi_eh_abort\n");
790 /* First give it some more time, how much is "right" is hard to say :-( */
792 busy
= ide_wait_not_busy(HWIF(drive
), 100); /* FIXME - uses mdelay which causes latency? */
793 if (test_bit(IDESCSI_LOG_CMD
, &scsi
->log
))
794 printk (KERN_WARNING
"ide-scsi: drive did%s become ready\n", busy
?" not":"");
796 spin_lock_irq(&ide_lock
);
798 /* If there is no pc running we're done (our interrupt took care of it) */
804 /* It's somewhere in flight. Does ide subsystem agree? */
805 if (scsi
->pc
->scsi_cmd
->serial_number
== cmd
->serial_number
&& !busy
&&
806 elv_queue_empty(drive
->queue
) && HWGROUP(drive
)->rq
!= scsi
->pc
->rq
) {
808 * FIXME - not sure this condition can ever occur
810 printk (KERN_ERR
"ide-scsi: cmd aborted!\n");
812 if (blk_sense_request(scsi
->pc
->rq
))
813 kfree(scsi
->pc
->buf
);
822 spin_unlock_irq(&ide_lock
);
824 if (test_bit(IDESCSI_LOG_CMD
, &scsi
->log
))
825 printk (KERN_WARNING
"ide-scsi: abort returns %s\n", ret
== SUCCESS
?"success":"failed");
830 static int idescsi_eh_reset (struct scsi_cmnd
*cmd
)
833 idescsi_scsi_t
*scsi
= scsihost_to_idescsi(cmd
->device
->host
);
834 ide_drive_t
*drive
= scsi
->drive
;
838 /* In idescsi_eh_reset we forcefully remove the command from the ide subsystem and reset the device. */
840 if (test_bit(IDESCSI_LOG_CMD
, &scsi
->log
))
841 printk (KERN_WARNING
"ide-scsi: reset called for %lu\n", cmd
->serial_number
);
844 printk (KERN_WARNING
"ide-scsi: Drive not set in idescsi_eh_reset\n");
849 spin_lock_irq(cmd
->device
->host
->host_lock
);
850 spin_lock(&ide_lock
);
852 if (!scsi
->pc
|| (req
= scsi
->pc
->rq
) != HWGROUP(drive
)->rq
|| !HWGROUP(drive
)->handler
) {
853 printk (KERN_WARNING
"ide-scsi: No active request in idescsi_eh_reset\n");
854 spin_unlock(&ide_lock
);
855 spin_unlock_irq(cmd
->device
->host
->host_lock
);
859 /* kill current request */
860 if (__blk_end_request(req
, -EIO
, 0))
862 if (blk_sense_request(req
))
863 kfree(scsi
->pc
->buf
);
868 /* now nuke the drive queue */
869 while ((req
= elv_next_request(drive
->queue
))) {
870 if (__blk_end_request(req
, -EIO
, 0))
874 HWGROUP(drive
)->rq
= NULL
;
875 HWGROUP(drive
)->handler
= NULL
;
876 HWGROUP(drive
)->busy
= 1; /* will set this to zero when ide reset finished */
877 spin_unlock(&ide_lock
);
881 /* ide_do_reset starts a polling handler which restarts itself every 50ms until the reset finishes */
884 spin_unlock_irq(cmd
->device
->host
->host_lock
);
886 spin_lock_irq(cmd
->device
->host
->host_lock
);
887 } while ( HWGROUP(drive
)->handler
);
889 ready
= drive_is_ready(drive
);
890 HWGROUP(drive
)->busy
--;
892 printk (KERN_ERR
"ide-scsi: reset failed!\n");
896 spin_unlock_irq(cmd
->device
->host
->host_lock
);
900 static int idescsi_bios(struct scsi_device
*sdev
, struct block_device
*bdev
,
901 sector_t capacity
, int *parm
)
903 idescsi_scsi_t
*idescsi
= scsihost_to_idescsi(sdev
->host
);
904 ide_drive_t
*drive
= idescsi
->drive
;
906 if (drive
->bios_cyl
&& drive
->bios_head
&& drive
->bios_sect
) {
907 parm
[0] = drive
->bios_head
;
908 parm
[1] = drive
->bios_sect
;
909 parm
[2] = drive
->bios_cyl
;
914 static struct scsi_host_template idescsi_template
= {
915 .module
= THIS_MODULE
,
917 .info
= idescsi_info
,
918 .slave_configure
= idescsi_slave_configure
,
919 .ioctl
= idescsi_ioctl
,
920 .queuecommand
= idescsi_queue
,
921 .eh_abort_handler
= idescsi_eh_abort
,
922 .eh_host_reset_handler
= idescsi_eh_reset
,
923 .bios_param
= idescsi_bios
,
929 .use_clustering
= DISABLE_CLUSTERING
,
931 .proc_name
= "ide-scsi",
934 static int ide_scsi_probe(ide_drive_t
*drive
)
936 idescsi_scsi_t
*idescsi
;
937 struct Scsi_Host
*host
;
942 if (!warned
&& drive
->media
== ide_cdrom
) {
943 printk(KERN_WARNING
"ide-scsi is deprecated for cd burning! Use ide-cd and give dev=/dev/hdX as device\n");
947 if (idescsi_nocd
&& drive
->media
== ide_cdrom
)
950 if (!strstr("ide-scsi", drive
->driver_req
) ||
952 drive
->media
== ide_disk
||
953 !(host
= scsi_host_alloc(&idescsi_template
,sizeof(idescsi_scsi_t
))))
958 g
= alloc_disk(1 << PARTN_BITS
);
962 ide_init_disk(g
, drive
);
966 if (drive
->id
->last_lun
)
967 debug_log("%s: id->last_lun=%u\n", drive
->name
,
968 drive
->id
->last_lun
);
970 if ((drive
->id
->last_lun
& 0x7) != 7)
971 host
->max_lun
= (drive
->id
->last_lun
& 0x7) + 1;
975 drive
->driver_data
= host
;
976 idescsi
= scsihost_to_idescsi(host
);
977 idescsi
->drive
= drive
;
978 idescsi
->driver
= &idescsi_driver
;
979 idescsi
->host
= host
;
981 g
->private_data
= &idescsi
->driver
;
982 ide_proc_register_driver(drive
, &idescsi_driver
);
984 idescsi_setup(drive
, idescsi
);
985 g
->fops
= &idescsi_ops
;
986 ide_register_region(g
);
987 err
= scsi_add_host(host
, &drive
->gendev
);
989 scsi_scan_host(host
);
992 /* fall through on error */
993 ide_unregister_region(g
);
994 ide_proc_unregister_driver(drive
, &idescsi_driver
);
1003 static int __init
init_idescsi_module(void)
1005 return driver_register(&idescsi_driver
.gen_driver
);
1008 static void __exit
exit_idescsi_module(void)
1010 driver_unregister(&idescsi_driver
.gen_driver
);
1013 module_param(idescsi_nocd
, int, 0600);
1014 MODULE_PARM_DESC(idescsi_nocd
, "Disable handling of CD-ROMs so they may be driven by ide-cd");
1015 module_init(init_idescsi_module
);
1016 module_exit(exit_idescsi_module
);
1017 MODULE_LICENSE("GPL");