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 * SCSI command transformation layer
66 #define IDESCSI_SG_TRANSFORM 1 /* /dev/sg transformation */
71 #define IDESCSI_LOG_CMD 0 /* Log SCSI commands */
73 typedef struct ide_scsi_obj
{
77 struct Scsi_Host
*host
;
79 struct ide_atapi_pc
*pc
; /* Current packet command */
80 unsigned long flags
; /* Status/Action flags */
81 unsigned long transform
; /* SCSI cmd translation layer */
82 unsigned long log
; /* log flags */
85 static DEFINE_MUTEX(idescsi_ref_mutex
);
86 /* Set by module param to skip cd */
87 static int idescsi_nocd
;
89 #define ide_scsi_g(disk) \
90 container_of((disk)->private_data, struct ide_scsi_obj, driver)
92 static struct ide_scsi_obj
*ide_scsi_get(struct gendisk
*disk
)
94 struct ide_scsi_obj
*scsi
= NULL
;
96 mutex_lock(&idescsi_ref_mutex
);
97 scsi
= ide_scsi_g(disk
);
99 scsi_host_get(scsi
->host
);
100 mutex_unlock(&idescsi_ref_mutex
);
104 static void ide_scsi_put(struct ide_scsi_obj
*scsi
)
106 mutex_lock(&idescsi_ref_mutex
);
107 scsi_host_put(scsi
->host
);
108 mutex_unlock(&idescsi_ref_mutex
);
111 static inline idescsi_scsi_t
*scsihost_to_idescsi(struct Scsi_Host
*host
)
113 return (idescsi_scsi_t
*) (&host
[1]);
116 static inline idescsi_scsi_t
*drive_to_idescsi(ide_drive_t
*ide_drive
)
118 return scsihost_to_idescsi(ide_drive
->driver_data
);
122 * Per ATAPI device status bits.
124 #define IDESCSI_DRQ_INTERRUPT 0 /* DRQ interrupt device */
129 #define IDESCSI_PC_RQ 90
132 * PIO data transfer routines using the scatter gather table.
134 static void idescsi_input_buffers(ide_drive_t
*drive
, struct ide_atapi_pc
*pc
,
137 ide_hwif_t
*hwif
= drive
->hwif
;
142 count
= min(pc
->sg
->length
- pc
->b_count
, bcount
);
143 if (PageHighMem(sg_page(pc
->sg
))) {
146 local_irq_save(flags
);
147 buf
= kmap_atomic(sg_page(pc
->sg
), KM_IRQ0
) +
149 hwif
->input_data(drive
, NULL
, buf
+ pc
->b_count
, count
);
150 kunmap_atomic(buf
- pc
->sg
->offset
, KM_IRQ0
);
151 local_irq_restore(flags
);
153 buf
= sg_virt(pc
->sg
);
154 hwif
->input_data(drive
, NULL
, buf
+ pc
->b_count
, count
);
156 bcount
-= count
; pc
->b_count
+= count
;
157 if (pc
->b_count
== pc
->sg
->length
) {
160 pc
->sg
= sg_next(pc
->sg
);
166 printk (KERN_ERR
"ide-scsi: scatter gather table too small, discarding data\n");
167 ide_pad_transfer(drive
, 0, bcount
);
171 static void idescsi_output_buffers(ide_drive_t
*drive
, struct ide_atapi_pc
*pc
,
174 ide_hwif_t
*hwif
= drive
->hwif
;
179 count
= min(pc
->sg
->length
- pc
->b_count
, bcount
);
180 if (PageHighMem(sg_page(pc
->sg
))) {
183 local_irq_save(flags
);
184 buf
= kmap_atomic(sg_page(pc
->sg
), KM_IRQ0
) +
186 hwif
->output_data(drive
, NULL
, buf
+ pc
->b_count
, count
);
187 kunmap_atomic(buf
- pc
->sg
->offset
, KM_IRQ0
);
188 local_irq_restore(flags
);
190 buf
= sg_virt(pc
->sg
);
191 hwif
->output_data(drive
, NULL
, buf
+ pc
->b_count
, count
);
193 bcount
-= count
; pc
->b_count
+= count
;
194 if (pc
->b_count
== pc
->sg
->length
) {
197 pc
->sg
= sg_next(pc
->sg
);
203 printk (KERN_ERR
"ide-scsi: scatter gather table too small, padding with zeros\n");
204 ide_pad_transfer(drive
, 1, bcount
);
208 static void ide_scsi_hex_dump(u8
*data
, int len
)
210 print_hex_dump(KERN_CONT
, "", DUMP_PREFIX_NONE
, 16, 1, data
, len
, 0);
213 static int idescsi_check_condition(ide_drive_t
*drive
,
214 struct request
*failed_cmd
)
216 idescsi_scsi_t
*scsi
= drive_to_idescsi(drive
);
217 struct ide_atapi_pc
*pc
;
221 /* stuff a sense request in front of our current request */
222 pc
= kzalloc(sizeof(struct ide_atapi_pc
), GFP_ATOMIC
);
223 rq
= kmalloc(sizeof(struct request
), GFP_ATOMIC
);
224 buf
= kzalloc(SCSI_SENSE_BUFFERSIZE
, GFP_ATOMIC
);
225 if (!pc
|| !rq
|| !buf
) {
231 blk_rq_init(NULL
, rq
);
232 rq
->special
= (char *) pc
;
235 pc
->c
[0] = REQUEST_SENSE
;
236 pc
->c
[4] = pc
->req_xfer
= pc
->buf_size
= SCSI_SENSE_BUFFERSIZE
;
237 rq
->cmd_type
= REQ_TYPE_SENSE
;
238 rq
->cmd_flags
|= REQ_PREEMPT
;
239 pc
->timeout
= jiffies
+ WAIT_READY
;
240 /* NOTE! Save the failed packet command in "rq->buffer" */
241 rq
->buffer
= (void *) failed_cmd
->special
;
242 pc
->scsi_cmd
= ((struct ide_atapi_pc
*) failed_cmd
->special
)->scsi_cmd
;
243 if (test_bit(IDESCSI_LOG_CMD
, &scsi
->log
)) {
244 printk ("ide-scsi: %s: queue cmd = ", drive
->name
);
245 ide_scsi_hex_dump(pc
->c
, 6);
247 rq
->rq_disk
= scsi
->disk
;
248 ide_do_drive_cmd(drive
, rq
);
252 static int idescsi_end_request(ide_drive_t
*, int, int);
254 static ide_startstop_t
255 idescsi_atapi_error(ide_drive_t
*drive
, struct request
*rq
, u8 stat
, u8 err
)
257 ide_hwif_t
*hwif
= drive
->hwif
;
259 if (ide_read_status(drive
) & (BUSY_STAT
| DRQ_STAT
))
261 hwif
->OUTBSYNC(hwif
, WIN_IDLEIMMEDIATE
,
262 hwif
->io_ports
.command_addr
);
266 idescsi_end_request(drive
, 0, 0);
271 static ide_startstop_t
272 idescsi_atapi_abort(ide_drive_t
*drive
, struct request
*rq
)
274 #if IDESCSI_DEBUG_LOG
275 printk(KERN_WARNING
"idescsi_atapi_abort called for %lu\n",
276 ((struct ide_atapi_pc
*) rq
->special
)->scsi_cmd
->serial_number
);
278 rq
->errors
|= ERROR_MAX
;
280 idescsi_end_request(drive
, 0, 0);
285 static int idescsi_end_request (ide_drive_t
*drive
, int uptodate
, int nrsecs
)
287 idescsi_scsi_t
*scsi
= drive_to_idescsi(drive
);
288 struct request
*rq
= HWGROUP(drive
)->rq
;
289 struct ide_atapi_pc
*pc
= (struct ide_atapi_pc
*) rq
->special
;
290 int log
= test_bit(IDESCSI_LOG_CMD
, &scsi
->log
);
291 struct Scsi_Host
*host
;
292 int errors
= rq
->errors
;
295 if (!blk_special_request(rq
) && !blk_sense_request(rq
)) {
296 ide_end_request(drive
, uptodate
, nrsecs
);
299 ide_end_drive_cmd (drive
, 0, 0);
300 if (blk_sense_request(rq
)) {
301 struct ide_atapi_pc
*opc
= (struct ide_atapi_pc
*) rq
->buffer
;
303 printk ("ide-scsi: %s: wrap up check %lu, rst = ", drive
->name
, opc
->scsi_cmd
->serial_number
);
304 ide_scsi_hex_dump(pc
->buf
, 16);
306 memcpy((void *) opc
->scsi_cmd
->sense_buffer
, pc
->buf
,
307 SCSI_SENSE_BUFFERSIZE
);
313 pc
->scsi_cmd
->result
= (CHECK_CONDITION
<< 1) |
314 (((pc
->flags
& PC_FLAG_TIMEDOUT
) ?
317 } else if (pc
->flags
& PC_FLAG_TIMEDOUT
) {
319 printk (KERN_WARNING
"ide-scsi: %s: timed out for %lu\n",
320 drive
->name
, pc
->scsi_cmd
->serial_number
);
321 pc
->scsi_cmd
->result
= DID_TIME_OUT
<< 16;
322 } else if (errors
>= ERROR_MAX
) {
323 pc
->scsi_cmd
->result
= DID_ERROR
<< 16;
325 printk ("ide-scsi: %s: I/O error for %lu\n", drive
->name
, pc
->scsi_cmd
->serial_number
);
328 printk ("ide-scsi: %s: check condition for %lu\n", drive
->name
, pc
->scsi_cmd
->serial_number
);
329 if (!idescsi_check_condition(drive
, rq
))
330 /* we started a request sense, so we'll be back, exit for now */
332 pc
->scsi_cmd
->result
= (CHECK_CONDITION
<< 1) | (DID_OK
<< 16);
334 pc
->scsi_cmd
->result
= DID_OK
<< 16;
336 host
= pc
->scsi_cmd
->device
->host
;
337 spin_lock_irqsave(host
->host_lock
, flags
);
338 pc
->done(pc
->scsi_cmd
);
339 spin_unlock_irqrestore(host
->host_lock
, flags
);
346 static inline unsigned long get_timeout(struct ide_atapi_pc
*pc
)
348 return max_t(unsigned long, WAIT_CMD
, pc
->timeout
- jiffies
);
351 static int idescsi_expiry(ide_drive_t
*drive
)
353 idescsi_scsi_t
*scsi
= drive_to_idescsi(drive
);
354 struct ide_atapi_pc
*pc
= scsi
->pc
;
356 #if IDESCSI_DEBUG_LOG
357 printk(KERN_WARNING
"idescsi_expiry called for %lu at %lu\n", pc
->scsi_cmd
->serial_number
, jiffies
);
359 pc
->flags
|= PC_FLAG_TIMEDOUT
;
361 return 0; /* we do not want the ide subsystem to retry */
365 * Our interrupt handler.
367 static ide_startstop_t
idescsi_pc_intr (ide_drive_t
*drive
)
369 idescsi_scsi_t
*scsi
= drive_to_idescsi(drive
);
370 ide_hwif_t
*hwif
= drive
->hwif
;
371 struct ide_atapi_pc
*pc
= scsi
->pc
;
372 struct request
*rq
= pc
->rq
;
377 #if IDESCSI_DEBUG_LOG
378 printk (KERN_INFO
"ide-scsi: Reached idescsi_pc_intr interrupt handler\n");
379 #endif /* IDESCSI_DEBUG_LOG */
381 if (pc
->flags
& PC_FLAG_TIMEDOUT
) {
382 #if IDESCSI_DEBUG_LOG
383 printk(KERN_WARNING
"idescsi_pc_intr: got timed out packet %lu at %lu\n",
384 pc
->scsi_cmd
->serial_number
, jiffies
);
386 /* end this request now - scsi should retry it*/
387 idescsi_end_request (drive
, 1, 0);
390 if (pc
->flags
& PC_FLAG_DMA_IN_PROGRESS
) {
391 pc
->flags
&= ~PC_FLAG_DMA_IN_PROGRESS
;
392 #if IDESCSI_DEBUG_LOG
393 printk ("ide-scsi: %s: DMA complete\n", drive
->name
);
394 #endif /* IDESCSI_DEBUG_LOG */
395 pc
->xferred
= pc
->req_xfer
;
396 (void)hwif
->dma_ops
->dma_end(drive
);
399 /* Clear the interrupt */
400 stat
= ide_read_status(drive
);
402 if ((stat
& DRQ_STAT
) == 0) {
403 /* No more interrupts */
404 if (test_bit(IDESCSI_LOG_CMD
, &scsi
->log
))
405 printk(KERN_INFO
"Packet command completed, %d bytes"
406 " transferred\n", pc
->xferred
);
407 local_irq_enable_in_hardirq();
410 idescsi_end_request (drive
, 1, 0);
413 bcount
= (hwif
->INB(hwif
->io_ports
.lbah_addr
) << 8) |
414 hwif
->INB(hwif
->io_ports
.lbam_addr
);
415 ireason
= hwif
->INB(hwif
->io_ports
.nsect_addr
);
418 printk(KERN_ERR
"ide-scsi: CoD != 0 in idescsi_pc_intr\n");
419 return ide_do_reset (drive
);
422 temp
= pc
->xferred
+ bcount
;
423 if (temp
> pc
->req_xfer
) {
424 if (temp
> pc
->buf_size
) {
425 printk(KERN_ERR
"ide-scsi: The scsi wants to "
426 "send us more data than expected "
427 "- discarding data\n");
428 temp
= pc
->buf_size
- pc
->xferred
;
430 pc
->flags
&= ~PC_FLAG_WRITING
;
432 idescsi_input_buffers(drive
, pc
,
435 hwif
->input_data(drive
, NULL
,
437 printk(KERN_ERR
"ide-scsi: transferred"
443 ide_pad_transfer(drive
, 0, bcount
- temp
);
444 ide_set_handler(drive
, &idescsi_pc_intr
, get_timeout(pc
), idescsi_expiry
);
447 #if IDESCSI_DEBUG_LOG
448 printk (KERN_NOTICE
"ide-scsi: The scsi wants to send us more data than expected - allowing transfer\n");
449 #endif /* IDESCSI_DEBUG_LOG */
453 pc
->flags
&= ~PC_FLAG_WRITING
;
455 idescsi_input_buffers(drive
, pc
, bcount
);
457 hwif
->input_data(drive
, NULL
, pc
->cur_pos
, bcount
);
459 pc
->flags
|= PC_FLAG_WRITING
;
461 idescsi_output_buffers(drive
, pc
, bcount
);
463 hwif
->output_data(drive
, NULL
, pc
->cur_pos
, bcount
);
465 /* Update the current position */
466 pc
->xferred
+= bcount
;
467 pc
->cur_pos
+= bcount
;
469 /* And set the interrupt handler again */
470 ide_set_handler(drive
, &idescsi_pc_intr
, get_timeout(pc
), idescsi_expiry
);
474 static ide_startstop_t
idescsi_transfer_pc(ide_drive_t
*drive
)
476 ide_hwif_t
*hwif
= drive
->hwif
;
477 idescsi_scsi_t
*scsi
= drive_to_idescsi(drive
);
478 struct ide_atapi_pc
*pc
= scsi
->pc
;
479 ide_startstop_t startstop
;
482 if (ide_wait_stat(&startstop
,drive
,DRQ_STAT
,BUSY_STAT
,WAIT_READY
)) {
483 printk(KERN_ERR
"ide-scsi: Strange, packet command "
484 "initiated yet DRQ isn't asserted\n");
487 ireason
= hwif
->INB(hwif
->io_ports
.nsect_addr
);
488 if ((ireason
& CD
) == 0 || (ireason
& IO
)) {
489 printk(KERN_ERR
"ide-scsi: (IO,CoD) != (0,1) while "
490 "issuing a packet command\n");
491 return ide_do_reset (drive
);
493 BUG_ON(HWGROUP(drive
)->handler
!= NULL
);
494 /* Set the interrupt routine */
495 ide_set_handler(drive
, &idescsi_pc_intr
, get_timeout(pc
), idescsi_expiry
);
497 /* Send the actual packet */
498 hwif
->output_data(drive
, NULL
, scsi
->pc
->c
, 12);
500 if (pc
->flags
& PC_FLAG_DMA_OK
) {
501 pc
->flags
|= PC_FLAG_DMA_IN_PROGRESS
;
502 hwif
->dma_ops
->dma_start(drive
);
507 static inline int idescsi_set_direction(struct ide_atapi_pc
*pc
)
510 case READ_6
: case READ_10
: case READ_12
:
511 pc
->flags
&= ~PC_FLAG_WRITING
;
513 case WRITE_6
: case WRITE_10
: case WRITE_12
:
514 pc
->flags
|= PC_FLAG_WRITING
;
521 static int idescsi_map_sg(ide_drive_t
*drive
, struct ide_atapi_pc
*pc
)
523 ide_hwif_t
*hwif
= drive
->hwif
;
524 struct scatterlist
*sg
, *scsi_sg
;
527 if (!pc
->req_xfer
|| pc
->req_xfer
% 1024)
530 if (idescsi_set_direction(pc
))
534 scsi_sg
= scsi_sglist(pc
->scsi_cmd
);
535 segments
= scsi_sg_count(pc
->scsi_cmd
);
537 if (segments
> hwif
->sg_max_nents
)
540 hwif
->sg_nents
= segments
;
541 memcpy(sg
, scsi_sg
, sizeof(*sg
) * segments
);
546 static ide_startstop_t
idescsi_issue_pc(ide_drive_t
*drive
,
547 struct ide_atapi_pc
*pc
)
549 idescsi_scsi_t
*scsi
= drive_to_idescsi(drive
);
550 ide_hwif_t
*hwif
= drive
->hwif
;
554 /* Set the current packet command */
556 /* We haven't transferred any data yet */
558 pc
->cur_pos
= pc
->buf
;
559 /* Request to transfer the entire buffer at once */
560 bcount
= min(pc
->req_xfer
, 63 * 1024);
562 if (drive
->using_dma
&& !idescsi_map_sg(drive
, pc
)) {
564 dma
= !hwif
->dma_ops
->dma_setup(drive
);
568 ide_pktcmd_tf_load(drive
, 0, bcount
, dma
);
571 pc
->flags
|= PC_FLAG_DMA_OK
;
573 if (test_bit(IDESCSI_DRQ_INTERRUPT
, &scsi
->flags
)) {
574 ide_execute_command(drive
, WIN_PACKETCMD
, &idescsi_transfer_pc
,
575 get_timeout(pc
), idescsi_expiry
);
578 /* Issue the packet command */
579 ide_execute_pkt_cmd(drive
);
580 return idescsi_transfer_pc(drive
);
585 * idescsi_do_request is our request handling function.
587 static ide_startstop_t
idescsi_do_request (ide_drive_t
*drive
, struct request
*rq
, sector_t block
)
589 #if IDESCSI_DEBUG_LOG
590 printk (KERN_INFO
"dev: %s, cmd: %x, errors: %d\n", rq
->rq_disk
->disk_name
,rq
->cmd
[0],rq
->errors
);
591 printk (KERN_INFO
"sector: %ld, nr_sectors: %ld, current_nr_sectors: %d\n",rq
->sector
,rq
->nr_sectors
,rq
->current_nr_sectors
);
592 #endif /* IDESCSI_DEBUG_LOG */
594 if (blk_sense_request(rq
) || blk_special_request(rq
)) {
595 return idescsi_issue_pc(drive
,
596 (struct ide_atapi_pc
*) rq
->special
);
598 blk_dump_rq_flags(rq
, "ide-scsi: unsup command");
599 idescsi_end_request (drive
, 0, 0);
603 #ifdef CONFIG_IDE_PROC_FS
604 static void idescsi_add_settings(ide_drive_t
*drive
)
606 idescsi_scsi_t
*scsi
= drive_to_idescsi(drive
);
609 * drive setting name read/write data type min max mul_factor div_factor data pointer set function
611 ide_add_setting(drive
, "bios_cyl", SETTING_RW
, TYPE_INT
, 0, 1023, 1, 1, &drive
->bios_cyl
, NULL
);
612 ide_add_setting(drive
, "bios_head", SETTING_RW
, TYPE_BYTE
, 0, 255, 1, 1, &drive
->bios_head
, NULL
);
613 ide_add_setting(drive
, "bios_sect", SETTING_RW
, TYPE_BYTE
, 0, 63, 1, 1, &drive
->bios_sect
, NULL
);
614 ide_add_setting(drive
, "transform", SETTING_RW
, TYPE_INT
, 0, 3, 1, 1, &scsi
->transform
, NULL
);
615 ide_add_setting(drive
, "log", SETTING_RW
, TYPE_INT
, 0, 1, 1, 1, &scsi
->log
, NULL
);
618 static inline void idescsi_add_settings(ide_drive_t
*drive
) { ; }
622 * Driver initialization.
624 static void idescsi_setup (ide_drive_t
*drive
, idescsi_scsi_t
*scsi
)
626 if (drive
->id
&& (drive
->id
->config
& 0x0060) == 0x20)
627 set_bit (IDESCSI_DRQ_INTERRUPT
, &scsi
->flags
);
628 clear_bit(IDESCSI_SG_TRANSFORM
, &scsi
->transform
);
629 #if IDESCSI_DEBUG_LOG
630 set_bit(IDESCSI_LOG_CMD
, &scsi
->log
);
631 #endif /* IDESCSI_DEBUG_LOG */
632 idescsi_add_settings(drive
);
635 static void ide_scsi_remove(ide_drive_t
*drive
)
637 struct Scsi_Host
*scsihost
= drive
->driver_data
;
638 struct ide_scsi_obj
*scsi
= scsihost_to_idescsi(scsihost
);
639 struct gendisk
*g
= scsi
->disk
;
641 scsi_remove_host(scsihost
);
642 ide_proc_unregister_driver(drive
, scsi
->driver
);
644 ide_unregister_region(g
);
646 drive
->driver_data
= NULL
;
647 g
->private_data
= NULL
;
653 static int ide_scsi_probe(ide_drive_t
*);
655 #ifdef CONFIG_IDE_PROC_FS
656 static ide_proc_entry_t idescsi_proc
[] = {
657 { "capacity", S_IFREG
|S_IRUGO
, proc_ide_read_capacity
, NULL
},
658 { NULL
, 0, NULL
, NULL
}
662 static ide_driver_t idescsi_driver
= {
664 .owner
= THIS_MODULE
,
666 .bus
= &ide_bus_type
,
668 .probe
= ide_scsi_probe
,
669 .remove
= ide_scsi_remove
,
670 .version
= IDESCSI_VERSION
,
672 .supports_dsc_overlap
= 0,
673 .do_request
= idescsi_do_request
,
674 .end_request
= idescsi_end_request
,
675 .error
= idescsi_atapi_error
,
676 .abort
= idescsi_atapi_abort
,
677 #ifdef CONFIG_IDE_PROC_FS
678 .proc
= idescsi_proc
,
682 static int idescsi_ide_open(struct inode
*inode
, struct file
*filp
)
684 struct gendisk
*disk
= inode
->i_bdev
->bd_disk
;
685 struct ide_scsi_obj
*scsi
;
687 if (!(scsi
= ide_scsi_get(disk
)))
693 static int idescsi_ide_release(struct inode
*inode
, struct file
*filp
)
695 struct gendisk
*disk
= inode
->i_bdev
->bd_disk
;
696 struct ide_scsi_obj
*scsi
= ide_scsi_g(disk
);
703 static int idescsi_ide_ioctl(struct inode
*inode
, struct file
*file
,
704 unsigned int cmd
, unsigned long arg
)
706 struct block_device
*bdev
= inode
->i_bdev
;
707 struct ide_scsi_obj
*scsi
= ide_scsi_g(bdev
->bd_disk
);
708 return generic_ide_ioctl(scsi
->drive
, file
, bdev
, cmd
, arg
);
711 static struct block_device_operations idescsi_ops
= {
712 .owner
= THIS_MODULE
,
713 .open
= idescsi_ide_open
,
714 .release
= idescsi_ide_release
,
715 .ioctl
= idescsi_ide_ioctl
,
718 static int idescsi_slave_configure(struct scsi_device
* sdp
)
720 /* Configure detected device */
721 sdp
->use_10_for_rw
= 1;
722 sdp
->use_10_for_ms
= 1;
723 scsi_adjust_queue_depth(sdp
, MSG_SIMPLE_TAG
, sdp
->host
->cmd_per_lun
);
727 static const char *idescsi_info (struct Scsi_Host
*host
)
729 return "SCSI host adapter emulation for IDE ATAPI devices";
732 static int idescsi_ioctl (struct scsi_device
*dev
, int cmd
, void __user
*arg
)
734 idescsi_scsi_t
*scsi
= scsihost_to_idescsi(dev
->host
);
736 if (cmd
== SG_SET_TRANSFORM
) {
738 set_bit(IDESCSI_SG_TRANSFORM
, &scsi
->transform
);
740 clear_bit(IDESCSI_SG_TRANSFORM
, &scsi
->transform
);
742 } else if (cmd
== SG_GET_TRANSFORM
)
743 return put_user(test_bit(IDESCSI_SG_TRANSFORM
, &scsi
->transform
), (int __user
*) arg
);
747 static int idescsi_queue (struct scsi_cmnd
*cmd
,
748 void (*done
)(struct scsi_cmnd
*))
750 struct Scsi_Host
*host
= cmd
->device
->host
;
751 idescsi_scsi_t
*scsi
= scsihost_to_idescsi(host
);
752 ide_drive_t
*drive
= scsi
->drive
;
753 struct request
*rq
= NULL
;
754 struct ide_atapi_pc
*pc
= NULL
;
757 scmd_printk (KERN_ERR
, cmd
, "drive not present\n");
760 scsi
= drive_to_idescsi(drive
);
761 pc
= kmalloc(sizeof(struct ide_atapi_pc
), GFP_ATOMIC
);
762 rq
= kmalloc(sizeof(struct request
), GFP_ATOMIC
);
763 if (rq
== NULL
|| pc
== NULL
) {
764 printk (KERN_ERR
"ide-scsi: %s: out of memory\n", drive
->name
);
768 memset (pc
->c
, 0, 12);
771 memcpy (pc
->c
, cmd
->cmnd
, cmd
->cmd_len
);
773 pc
->sg
= scsi_sglist(cmd
);
774 pc
->sg_cnt
= scsi_sg_count(cmd
);
776 pc
->req_xfer
= pc
->buf_size
= scsi_bufflen(cmd
);
779 pc
->timeout
= jiffies
+ cmd
->timeout_per_command
;
781 if (test_bit(IDESCSI_LOG_CMD
, &scsi
->log
)) {
782 printk ("ide-scsi: %s: que %lu, cmd = ", drive
->name
, cmd
->serial_number
);
783 ide_scsi_hex_dump(cmd
->cmnd
, cmd
->cmd_len
);
784 if (memcmp(pc
->c
, cmd
->cmnd
, cmd
->cmd_len
)) {
785 printk ("ide-scsi: %s: que %lu, tsl = ", drive
->name
, cmd
->serial_number
);
786 ide_scsi_hex_dump(pc
->c
, 12);
790 blk_rq_init(NULL
, rq
);
791 rq
->special
= (char *) pc
;
792 rq
->cmd_type
= REQ_TYPE_SPECIAL
;
793 spin_unlock_irq(host
->host_lock
);
794 blk_execute_rq_nowait(drive
->queue
, scsi
->disk
, rq
, 0, NULL
);
795 spin_lock_irq(host
->host_lock
);
800 cmd
->result
= DID_ERROR
<< 16;
805 static int idescsi_eh_abort (struct scsi_cmnd
*cmd
)
807 idescsi_scsi_t
*scsi
= scsihost_to_idescsi(cmd
->device
->host
);
808 ide_drive_t
*drive
= scsi
->drive
;
812 /* In idescsi_eh_abort we try to gently pry our command from the ide subsystem */
814 if (test_bit(IDESCSI_LOG_CMD
, &scsi
->log
))
815 printk (KERN_WARNING
"ide-scsi: abort called for %lu\n", cmd
->serial_number
);
818 printk (KERN_WARNING
"ide-scsi: Drive not set in idescsi_eh_abort\n");
823 /* First give it some more time, how much is "right" is hard to say :-( */
825 busy
= ide_wait_not_busy(HWIF(drive
), 100); /* FIXME - uses mdelay which causes latency? */
826 if (test_bit(IDESCSI_LOG_CMD
, &scsi
->log
))
827 printk (KERN_WARNING
"ide-scsi: drive did%s become ready\n", busy
?" not":"");
829 spin_lock_irq(&ide_lock
);
831 /* If there is no pc running we're done (our interrupt took care of it) */
837 /* It's somewhere in flight. Does ide subsystem agree? */
838 if (scsi
->pc
->scsi_cmd
->serial_number
== cmd
->serial_number
&& !busy
&&
839 elv_queue_empty(drive
->queue
) && HWGROUP(drive
)->rq
!= scsi
->pc
->rq
) {
841 * FIXME - not sure this condition can ever occur
843 printk (KERN_ERR
"ide-scsi: cmd aborted!\n");
845 if (blk_sense_request(scsi
->pc
->rq
))
846 kfree(scsi
->pc
->buf
);
855 spin_unlock_irq(&ide_lock
);
857 if (test_bit(IDESCSI_LOG_CMD
, &scsi
->log
))
858 printk (KERN_WARNING
"ide-scsi: abort returns %s\n", ret
== SUCCESS
?"success":"failed");
863 static int idescsi_eh_reset (struct scsi_cmnd
*cmd
)
866 idescsi_scsi_t
*scsi
= scsihost_to_idescsi(cmd
->device
->host
);
867 ide_drive_t
*drive
= scsi
->drive
;
871 /* In idescsi_eh_reset we forcefully remove the command from the ide subsystem and reset the device. */
873 if (test_bit(IDESCSI_LOG_CMD
, &scsi
->log
))
874 printk (KERN_WARNING
"ide-scsi: reset called for %lu\n", cmd
->serial_number
);
877 printk (KERN_WARNING
"ide-scsi: Drive not set in idescsi_eh_reset\n");
882 spin_lock_irq(cmd
->device
->host
->host_lock
);
883 spin_lock(&ide_lock
);
885 if (!scsi
->pc
|| (req
= scsi
->pc
->rq
) != HWGROUP(drive
)->rq
|| !HWGROUP(drive
)->handler
) {
886 printk (KERN_WARNING
"ide-scsi: No active request in idescsi_eh_reset\n");
887 spin_unlock(&ide_lock
);
888 spin_unlock_irq(cmd
->device
->host
->host_lock
);
892 /* kill current request */
893 if (__blk_end_request(req
, -EIO
, 0))
895 if (blk_sense_request(req
))
896 kfree(scsi
->pc
->buf
);
901 /* now nuke the drive queue */
902 while ((req
= elv_next_request(drive
->queue
))) {
903 if (__blk_end_request(req
, -EIO
, 0))
907 HWGROUP(drive
)->rq
= NULL
;
908 HWGROUP(drive
)->handler
= NULL
;
909 HWGROUP(drive
)->busy
= 1; /* will set this to zero when ide reset finished */
910 spin_unlock(&ide_lock
);
914 /* ide_do_reset starts a polling handler which restarts itself every 50ms until the reset finishes */
917 spin_unlock_irq(cmd
->device
->host
->host_lock
);
919 spin_lock_irq(cmd
->device
->host
->host_lock
);
920 } while ( HWGROUP(drive
)->handler
);
922 ready
= drive_is_ready(drive
);
923 HWGROUP(drive
)->busy
--;
925 printk (KERN_ERR
"ide-scsi: reset failed!\n");
929 spin_unlock_irq(cmd
->device
->host
->host_lock
);
933 static int idescsi_bios(struct scsi_device
*sdev
, struct block_device
*bdev
,
934 sector_t capacity
, int *parm
)
936 idescsi_scsi_t
*idescsi
= scsihost_to_idescsi(sdev
->host
);
937 ide_drive_t
*drive
= idescsi
->drive
;
939 if (drive
->bios_cyl
&& drive
->bios_head
&& drive
->bios_sect
) {
940 parm
[0] = drive
->bios_head
;
941 parm
[1] = drive
->bios_sect
;
942 parm
[2] = drive
->bios_cyl
;
947 static struct scsi_host_template idescsi_template
= {
948 .module
= THIS_MODULE
,
950 .info
= idescsi_info
,
951 .slave_configure
= idescsi_slave_configure
,
952 .ioctl
= idescsi_ioctl
,
953 .queuecommand
= idescsi_queue
,
954 .eh_abort_handler
= idescsi_eh_abort
,
955 .eh_host_reset_handler
= idescsi_eh_reset
,
956 .bios_param
= idescsi_bios
,
962 .use_clustering
= DISABLE_CLUSTERING
,
964 .proc_name
= "ide-scsi",
967 static int ide_scsi_probe(ide_drive_t
*drive
)
969 idescsi_scsi_t
*idescsi
;
970 struct Scsi_Host
*host
;
975 if (!warned
&& drive
->media
== ide_cdrom
) {
976 printk(KERN_WARNING
"ide-scsi is deprecated for cd burning! Use ide-cd and give dev=/dev/hdX as device\n");
980 if (idescsi_nocd
&& drive
->media
== ide_cdrom
)
983 if (!strstr("ide-scsi", drive
->driver_req
) ||
985 drive
->media
== ide_disk
||
986 !(host
= scsi_host_alloc(&idescsi_template
,sizeof(idescsi_scsi_t
))))
989 g
= alloc_disk(1 << PARTN_BITS
);
993 ide_init_disk(g
, drive
);
997 #if IDESCSI_DEBUG_LOG
998 if (drive
->id
->last_lun
)
999 printk(KERN_NOTICE
"%s: id->last_lun=%u\n", drive
->name
, drive
->id
->last_lun
);
1001 if ((drive
->id
->last_lun
& 0x7) != 7)
1002 host
->max_lun
= (drive
->id
->last_lun
& 0x7) + 1;
1006 drive
->driver_data
= host
;
1007 idescsi
= scsihost_to_idescsi(host
);
1008 idescsi
->drive
= drive
;
1009 idescsi
->driver
= &idescsi_driver
;
1010 idescsi
->host
= host
;
1012 g
->private_data
= &idescsi
->driver
;
1013 ide_proc_register_driver(drive
, &idescsi_driver
);
1015 idescsi_setup(drive
, idescsi
);
1016 g
->fops
= &idescsi_ops
;
1017 ide_register_region(g
);
1018 err
= scsi_add_host(host
, &drive
->gendev
);
1020 scsi_scan_host(host
);
1023 /* fall through on error */
1024 ide_unregister_region(g
);
1025 ide_proc_unregister_driver(drive
, &idescsi_driver
);
1029 scsi_host_put(host
);
1033 static int __init
init_idescsi_module(void)
1035 return driver_register(&idescsi_driver
.gen_driver
);
1038 static void __exit
exit_idescsi_module(void)
1040 driver_unregister(&idescsi_driver
.gen_driver
);
1043 module_param(idescsi_nocd
, int, 0600);
1044 MODULE_PARM_DESC(idescsi_nocd
, "Disable handling of CD-ROMs so they may be driven by ide-cd");
1045 module_init(init_idescsi_module
);
1046 module_exit(exit_idescsi_module
);
1047 MODULE_LICENSE("GPL");