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authorFUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>2009-01-02 10:12:51 -0500
committerBartlomiej Zolnierkiewicz <bzolnier@gmail.com>2009-01-02 10:12:51 -0500
commit93c164af19f608c5f737eb9bed8cb4de3a872329 (patch)
tree3a109f884e7db11e8201b255243c3a4b4e82d1ba /drivers/scsi/ide-scsi.c
parent07bd3f4731f9c7ebcbab90905ca4ad6fc6825f96 (diff)
remove ide-scsi
As planed, this removes ide-scsi. The 2.6 kernel supports direct writing to ide CD drives, which eliminates the need for ide-scsi. ide-scsi has been unmaintained and marked as deprecated. Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Cc: James.Bottomley@HansenPartnership.com Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Diffstat (limited to 'drivers/scsi/ide-scsi.c')
-rw-r--r--drivers/scsi/ide-scsi.c840
1 files changed, 0 insertions, 840 deletions
diff --git a/drivers/scsi/ide-scsi.c b/drivers/scsi/ide-scsi.c
deleted file mode 100644
index c24140aff8e7..000000000000
--- a/drivers/scsi/ide-scsi.c
+++ /dev/null
@@ -1,840 +0,0 @@
1/*
2 * Copyright (C) 1996-1999 Gadi Oxman <gadio@netvision.net.il>
3 * Copyright (C) 2004-2005 Bartlomiej Zolnierkiewicz
4 */
5
6/*
7 * Emulation of a SCSI host adapter for IDE ATAPI devices.
8 *
9 * With this driver, one can use the Linux SCSI drivers instead of the
10 * native IDE ATAPI drivers.
11 *
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
31 */
32
33#define IDESCSI_VERSION "0.92"
34
35#include <linux/module.h>
36#include <linux/types.h>
37#include <linux/string.h>
38#include <linux/kernel.h>
39#include <linux/mm.h>
40#include <linux/ioport.h>
41#include <linux/blkdev.h>
42#include <linux/errno.h>
43#include <linux/slab.h>
44#include <linux/ide.h>
45#include <linux/scatterlist.h>
46#include <linux/delay.h>
47#include <linux/mutex.h>
48#include <linux/bitops.h>
49
50#include <asm/io.h>
51#include <asm/uaccess.h>
52
53#include <scsi/scsi.h>
54#include <scsi/scsi_cmnd.h>
55#include <scsi/scsi_device.h>
56#include <scsi/scsi_host.h>
57#include <scsi/scsi_tcq.h>
58#include <scsi/sg.h>
59
60#define IDESCSI_DEBUG_LOG 0
61
62#if IDESCSI_DEBUG_LOG
63#define debug_log(fmt, args...) \
64 printk(KERN_INFO "ide-scsi: " fmt, ## args)
65#else
66#define debug_log(fmt, args...) do {} while (0)
67#endif
68
69/*
70 * SCSI command transformation layer
71 */
72#define IDESCSI_SG_TRANSFORM 1 /* /dev/sg transformation */
73
74/*
75 * Log flags
76 */
77#define IDESCSI_LOG_CMD 0 /* Log SCSI commands */
78
79typedef struct ide_scsi_obj {
80 ide_drive_t *drive;
81 ide_driver_t *driver;
82 struct gendisk *disk;
83 struct Scsi_Host *host;
84
85 unsigned long transform; /* SCSI cmd translation layer */
86 unsigned long log; /* log flags */
87} idescsi_scsi_t;
88
89static DEFINE_MUTEX(idescsi_ref_mutex);
90/* Set by module param to skip cd */
91static int idescsi_nocd;
92
93#define ide_scsi_g(disk) \
94 container_of((disk)->private_data, struct ide_scsi_obj, driver)
95
96static struct ide_scsi_obj *ide_scsi_get(struct gendisk *disk)
97{
98 struct ide_scsi_obj *scsi = NULL;
99
100 mutex_lock(&idescsi_ref_mutex);
101 scsi = ide_scsi_g(disk);
102 if (scsi) {
103 if (ide_device_get(scsi->drive))
104 scsi = NULL;
105 else
106 scsi_host_get(scsi->host);
107 }
108 mutex_unlock(&idescsi_ref_mutex);
109 return scsi;
110}
111
112static void ide_scsi_put(struct ide_scsi_obj *scsi)
113{
114 ide_drive_t *drive = scsi->drive;
115
116 mutex_lock(&idescsi_ref_mutex);
117 scsi_host_put(scsi->host);
118 ide_device_put(drive);
119 mutex_unlock(&idescsi_ref_mutex);
120}
121
122static inline idescsi_scsi_t *scsihost_to_idescsi(struct Scsi_Host *host)
123{
124 return (idescsi_scsi_t*) (&host[1]);
125}
126
127static inline idescsi_scsi_t *drive_to_idescsi(ide_drive_t *ide_drive)
128{
129 return scsihost_to_idescsi(ide_drive->driver_data);
130}
131
132static void ide_scsi_hex_dump(u8 *data, int len)
133{
134 print_hex_dump(KERN_CONT, "", DUMP_PREFIX_NONE, 16, 1, data, len, 0);
135}
136
137static int idescsi_end_request(ide_drive_t *, int, int);
138
139static void ide_scsi_callback(ide_drive_t *drive, int dsc)
140{
141 idescsi_scsi_t *scsi = drive_to_idescsi(drive);
142 struct ide_atapi_pc *pc = drive->pc;
143
144 if (pc->flags & PC_FLAG_TIMEDOUT)
145 debug_log("%s: got timed out packet %lu at %lu\n", __func__,
146 pc->scsi_cmd->serial_number, jiffies);
147 /* end this request now - scsi should retry it*/
148 else if (test_bit(IDESCSI_LOG_CMD, &scsi->log))
149 printk(KERN_INFO "Packet command completed, %d bytes"
150 " transferred\n", pc->xferred);
151
152 idescsi_end_request(drive, 1, 0);
153}
154
155static int idescsi_check_condition(ide_drive_t *drive,
156 struct request *failed_cmd)
157{
158 idescsi_scsi_t *scsi = drive_to_idescsi(drive);
159 struct ide_atapi_pc *pc;
160 struct request *rq;
161 u8 *buf;
162
163 /* stuff a sense request in front of our current request */
164 pc = kzalloc(sizeof(struct ide_atapi_pc), GFP_ATOMIC);
165 rq = blk_get_request(drive->queue, READ, GFP_ATOMIC);
166 buf = kzalloc(SCSI_SENSE_BUFFERSIZE, GFP_ATOMIC);
167 if (!pc || !rq || !buf) {
168 kfree(buf);
169 if (rq)
170 blk_put_request(rq);
171 kfree(pc);
172 return -ENOMEM;
173 }
174 rq->special = (char *) pc;
175 pc->rq = rq;
176 pc->buf = buf;
177 pc->c[0] = REQUEST_SENSE;
178 pc->c[4] = pc->req_xfer = pc->buf_size = SCSI_SENSE_BUFFERSIZE;
179 rq->cmd_type = REQ_TYPE_SENSE;
180 rq->cmd_flags |= REQ_PREEMPT;
181 pc->timeout = jiffies + WAIT_READY;
182 /* NOTE! Save the failed packet command in "rq->buffer" */
183 rq->buffer = (void *) failed_cmd->special;
184 pc->scsi_cmd = ((struct ide_atapi_pc *) failed_cmd->special)->scsi_cmd;
185 if (test_bit(IDESCSI_LOG_CMD, &scsi->log)) {
186 printk ("ide-scsi: %s: queue cmd = ", drive->name);
187 ide_scsi_hex_dump(pc->c, 6);
188 }
189 rq->rq_disk = scsi->disk;
190 rq->ref_count++;
191 memcpy(rq->cmd, pc->c, 12);
192 ide_do_drive_cmd(drive, rq);
193 return 0;
194}
195
196static ide_startstop_t
197idescsi_atapi_error(ide_drive_t *drive, struct request *rq, u8 stat, u8 err)
198{
199 ide_hwif_t *hwif = drive->hwif;
200
201 if (hwif->tp_ops->read_status(hwif) & (ATA_BUSY | ATA_DRQ))
202 /* force an abort */
203 hwif->tp_ops->exec_command(hwif, ATA_CMD_IDLEIMMEDIATE);
204
205 rq->errors++;
206
207 idescsi_end_request(drive, 0, 0);
208
209 return ide_stopped;
210}
211
212static int idescsi_end_request (ide_drive_t *drive, int uptodate, int nrsecs)
213{
214 idescsi_scsi_t *scsi = drive_to_idescsi(drive);
215 struct request *rq = HWGROUP(drive)->rq;
216 struct ide_atapi_pc *pc = (struct ide_atapi_pc *) rq->special;
217 int log = test_bit(IDESCSI_LOG_CMD, &scsi->log);
218 struct Scsi_Host *host;
219 int errors = rq->errors;
220 unsigned long flags;
221
222 if (!blk_special_request(rq) && !blk_sense_request(rq)) {
223 ide_end_request(drive, uptodate, nrsecs);
224 return 0;
225 }
226 ide_end_drive_cmd (drive, 0, 0);
227 if (blk_sense_request(rq)) {
228 struct ide_atapi_pc *opc = (struct ide_atapi_pc *) rq->buffer;
229 if (log) {
230 printk ("ide-scsi: %s: wrap up check %lu, rst = ", drive->name, opc->scsi_cmd->serial_number);
231 ide_scsi_hex_dump(pc->buf, 16);
232 }
233 memcpy((void *) opc->scsi_cmd->sense_buffer, pc->buf,
234 SCSI_SENSE_BUFFERSIZE);
235 kfree(pc->buf);
236 kfree(pc);
237 blk_put_request(rq);
238 pc = opc;
239 rq = pc->rq;
240 pc->scsi_cmd->result = (CHECK_CONDITION << 1) |
241 (((pc->flags & PC_FLAG_TIMEDOUT) ?
242 DID_TIME_OUT :
243 DID_OK) << 16);
244 } else if (pc->flags & PC_FLAG_TIMEDOUT) {
245 if (log)
246 printk (KERN_WARNING "ide-scsi: %s: timed out for %lu\n",
247 drive->name, pc->scsi_cmd->serial_number);
248 pc->scsi_cmd->result = DID_TIME_OUT << 16;
249 } else if (errors >= ERROR_MAX) {
250 pc->scsi_cmd->result = DID_ERROR << 16;
251 if (log)
252 printk ("ide-scsi: %s: I/O error for %lu\n", drive->name, pc->scsi_cmd->serial_number);
253 } else if (errors) {
254 if (log)
255 printk ("ide-scsi: %s: check condition for %lu\n", drive->name, pc->scsi_cmd->serial_number);
256 if (!idescsi_check_condition(drive, rq))
257 /* we started a request sense, so we'll be back, exit for now */
258 return 0;
259 pc->scsi_cmd->result = (CHECK_CONDITION << 1) | (DID_OK << 16);
260 } else {
261 pc->scsi_cmd->result = DID_OK << 16;
262 }
263 host = pc->scsi_cmd->device->host;
264 spin_lock_irqsave(host->host_lock, flags);
265 pc->done(pc->scsi_cmd);
266 spin_unlock_irqrestore(host->host_lock, flags);
267 kfree(pc);
268 blk_put_request(rq);
269 drive->pc = NULL;
270 return 0;
271}
272
273static inline int idescsi_set_direction(struct ide_atapi_pc *pc)
274{
275 switch (pc->c[0]) {
276 case READ_6: case READ_10: case READ_12:
277 pc->flags &= ~PC_FLAG_WRITING;
278 return 0;
279 case WRITE_6: case WRITE_10: case WRITE_12:
280 pc->flags |= PC_FLAG_WRITING;
281 return 0;
282 default:
283 return 1;
284 }
285}
286
287static int idescsi_map_sg(ide_drive_t *drive, struct ide_atapi_pc *pc)
288{
289 ide_hwif_t *hwif = drive->hwif;
290 struct scatterlist *sg, *scsi_sg;
291 int segments;
292
293 if (!pc->req_xfer || pc->req_xfer % 1024)
294 return 1;
295
296 if (idescsi_set_direction(pc))
297 return 1;
298
299 sg = hwif->sg_table;
300 scsi_sg = scsi_sglist(pc->scsi_cmd);
301 segments = scsi_sg_count(pc->scsi_cmd);
302
303 if (segments > hwif->sg_max_nents)
304 return 1;
305
306 hwif->sg_nents = segments;
307 memcpy(sg, scsi_sg, sizeof(*sg) * segments);
308
309 return 0;
310}
311
312static ide_startstop_t idescsi_issue_pc(ide_drive_t *drive,
313 struct ide_atapi_pc *pc)
314{
315 /* Set the current packet command */
316 drive->pc = pc;
317
318 return ide_issue_pc(drive, ide_scsi_get_timeout(pc), ide_scsi_expiry);
319}
320
321/*
322 * idescsi_do_request is our request handling function.
323 */
324static ide_startstop_t idescsi_do_request (ide_drive_t *drive, struct request *rq, sector_t block)
325{
326 debug_log("dev: %s, cmd: %x, errors: %d\n", rq->rq_disk->disk_name,
327 rq->cmd[0], rq->errors);
328 debug_log("sector: %ld, nr_sectors: %ld, current_nr_sectors: %d\n",
329 rq->sector, rq->nr_sectors, rq->current_nr_sectors);
330
331 if (blk_sense_request(rq) || blk_special_request(rq)) {
332 struct ide_atapi_pc *pc = (struct ide_atapi_pc *)rq->special;
333
334 if ((drive->dev_flags & IDE_DFLAG_USING_DMA) &&
335 idescsi_map_sg(drive, pc) == 0)
336 pc->flags |= PC_FLAG_DMA_OK;
337
338 return idescsi_issue_pc(drive, pc);
339 }
340 blk_dump_rq_flags(rq, "ide-scsi: unsup command");
341 idescsi_end_request (drive, 0, 0);
342 return ide_stopped;
343}
344
345#ifdef CONFIG_IDE_PROC_FS
346static ide_proc_entry_t idescsi_proc[] = {
347 { "capacity", S_IFREG|S_IRUGO, proc_ide_read_capacity, NULL },
348 { NULL, 0, NULL, NULL }
349};
350
351#define ide_scsi_devset_get(name, field) \
352static int get_##name(ide_drive_t *drive) \
353{ \
354 idescsi_scsi_t *scsi = drive_to_idescsi(drive); \
355 return scsi->field; \
356}
357
358#define ide_scsi_devset_set(name, field) \
359static int set_##name(ide_drive_t *drive, int arg) \
360{ \
361 idescsi_scsi_t *scsi = drive_to_idescsi(drive); \
362 scsi->field = arg; \
363 return 0; \
364}
365
366#define ide_scsi_devset_rw_field(_name, _field) \
367ide_scsi_devset_get(_name, _field); \
368ide_scsi_devset_set(_name, _field); \
369IDE_DEVSET(_name, DS_SYNC, get_##_name, set_##_name);
370
371ide_devset_rw_field(bios_cyl, bios_cyl);
372ide_devset_rw_field(bios_head, bios_head);
373ide_devset_rw_field(bios_sect, bios_sect);
374
375ide_scsi_devset_rw_field(transform, transform);
376ide_scsi_devset_rw_field(log, log);
377
378static const struct ide_proc_devset idescsi_settings[] = {
379 IDE_PROC_DEVSET(bios_cyl, 0, 1023),
380 IDE_PROC_DEVSET(bios_head, 0, 255),
381 IDE_PROC_DEVSET(bios_sect, 0, 63),
382 IDE_PROC_DEVSET(log, 0, 1),
383 IDE_PROC_DEVSET(transform, 0, 3),
384 { 0 },
385};
386
387static ide_proc_entry_t *ide_scsi_proc_entries(ide_drive_t *drive)
388{
389 return idescsi_proc;
390}
391
392static const struct ide_proc_devset *ide_scsi_proc_devsets(ide_drive_t *drive)
393{
394 return idescsi_settings;
395}
396#endif
397
398/*
399 * Driver initialization.
400 */
401static void idescsi_setup (ide_drive_t *drive, idescsi_scsi_t *scsi)
402{
403 clear_bit(IDESCSI_SG_TRANSFORM, &scsi->transform);
404#if IDESCSI_DEBUG_LOG
405 set_bit(IDESCSI_LOG_CMD, &scsi->log);
406#endif /* IDESCSI_DEBUG_LOG */
407
408 drive->pc_callback = ide_scsi_callback;
409 drive->pc_update_buffers = NULL;
410 drive->pc_io_buffers = ide_io_buffers;
411
412 ide_proc_register_driver(drive, scsi->driver);
413}
414
415static void ide_scsi_remove(ide_drive_t *drive)
416{
417 struct Scsi_Host *scsihost = drive->driver_data;
418 struct ide_scsi_obj *scsi = scsihost_to_idescsi(scsihost);
419 struct gendisk *g = scsi->disk;
420
421 scsi_remove_host(scsihost);
422 ide_proc_unregister_driver(drive, scsi->driver);
423
424 ide_unregister_region(g);
425
426 drive->driver_data = NULL;
427 g->private_data = NULL;
428 put_disk(g);
429
430 ide_scsi_put(scsi);
431
432 drive->dev_flags &= ~IDE_DFLAG_SCSI;
433}
434
435static int ide_scsi_probe(ide_drive_t *);
436
437static ide_driver_t idescsi_driver = {
438 .gen_driver = {
439 .owner = THIS_MODULE,
440 .name = "ide-scsi",
441 .bus = &ide_bus_type,
442 },
443 .probe = ide_scsi_probe,
444 .remove = ide_scsi_remove,
445 .version = IDESCSI_VERSION,
446 .do_request = idescsi_do_request,
447 .end_request = idescsi_end_request,
448 .error = idescsi_atapi_error,
449#ifdef CONFIG_IDE_PROC_FS
450 .proc_entries = ide_scsi_proc_entries,
451 .proc_devsets = ide_scsi_proc_devsets,
452#endif
453};
454
455static int idescsi_ide_open(struct block_device *bdev, fmode_t mode)
456{
457 struct ide_scsi_obj *scsi = ide_scsi_get(bdev->bd_disk);
458
459 if (!scsi)
460 return -ENXIO;
461
462 return 0;
463}
464
465static int idescsi_ide_release(struct gendisk *disk, fmode_t mode)
466{
467 ide_scsi_put(ide_scsi_g(disk));
468 return 0;
469}
470
471static int idescsi_ide_ioctl(struct block_device *bdev, fmode_t mode,
472 unsigned int cmd, unsigned long arg)
473{
474 struct ide_scsi_obj *scsi = ide_scsi_g(bdev->bd_disk);
475 return generic_ide_ioctl(scsi->drive, bdev, cmd, arg);
476}
477
478static struct block_device_operations idescsi_ops = {
479 .owner = THIS_MODULE,
480 .open = idescsi_ide_open,
481 .release = idescsi_ide_release,
482 .locked_ioctl = idescsi_ide_ioctl,
483};
484
485static int idescsi_slave_configure(struct scsi_device * sdp)
486{
487 /* Configure detected device */
488 sdp->use_10_for_rw = 1;
489 sdp->use_10_for_ms = 1;
490 scsi_adjust_queue_depth(sdp, MSG_SIMPLE_TAG, sdp->host->cmd_per_lun);
491 return 0;
492}
493
494static const char *idescsi_info (struct Scsi_Host *host)
495{
496 return "SCSI host adapter emulation for IDE ATAPI devices";
497}
498
499static int idescsi_ioctl (struct scsi_device *dev, int cmd, void __user *arg)
500{
501 idescsi_scsi_t *scsi = scsihost_to_idescsi(dev->host);
502
503 if (cmd == SG_SET_TRANSFORM) {
504 if (arg)
505 set_bit(IDESCSI_SG_TRANSFORM, &scsi->transform);
506 else
507 clear_bit(IDESCSI_SG_TRANSFORM, &scsi->transform);
508 return 0;
509 } else if (cmd == SG_GET_TRANSFORM)
510 return put_user(test_bit(IDESCSI_SG_TRANSFORM, &scsi->transform), (int __user *) arg);
511 return -EINVAL;
512}
513
514static int idescsi_queue (struct scsi_cmnd *cmd,
515 void (*done)(struct scsi_cmnd *))
516{
517 struct Scsi_Host *host = cmd->device->host;
518 idescsi_scsi_t *scsi = scsihost_to_idescsi(host);
519 ide_drive_t *drive = scsi->drive;
520 struct request *rq = NULL;
521 struct ide_atapi_pc *pc = NULL;
522 int write = cmd->sc_data_direction == DMA_TO_DEVICE;
523
524 if (!drive) {
525 scmd_printk (KERN_ERR, cmd, "drive not present\n");
526 goto abort;
527 }
528 scsi = drive_to_idescsi(drive);
529 pc = kmalloc(sizeof(struct ide_atapi_pc), GFP_ATOMIC);
530 rq = blk_get_request(drive->queue, write, GFP_ATOMIC);
531 if (rq == NULL || pc == NULL) {
532 printk (KERN_ERR "ide-scsi: %s: out of memory\n", drive->name);
533 goto abort;
534 }
535
536 memset (pc->c, 0, 12);
537 pc->flags = 0;
538 if (cmd->sc_data_direction == DMA_TO_DEVICE)
539 pc->flags |= PC_FLAG_WRITING;
540 pc->rq = rq;
541 memcpy (pc->c, cmd->cmnd, cmd->cmd_len);
542 pc->buf = NULL;
543 pc->sg = scsi_sglist(cmd);
544 pc->sg_cnt = scsi_sg_count(cmd);
545 pc->b_count = 0;
546 pc->req_xfer = pc->buf_size = scsi_bufflen(cmd);
547 pc->scsi_cmd = cmd;
548 pc->done = done;
549 pc->timeout = jiffies + cmd->request->timeout;
550
551 if (test_bit(IDESCSI_LOG_CMD, &scsi->log)) {
552 printk ("ide-scsi: %s: que %lu, cmd = ", drive->name, cmd->serial_number);
553 ide_scsi_hex_dump(cmd->cmnd, cmd->cmd_len);
554 if (memcmp(pc->c, cmd->cmnd, cmd->cmd_len)) {
555 printk ("ide-scsi: %s: que %lu, tsl = ", drive->name, cmd->serial_number);
556 ide_scsi_hex_dump(pc->c, 12);
557 }
558 }
559
560 rq->special = (char *) pc;
561 rq->cmd_type = REQ_TYPE_SPECIAL;
562 spin_unlock_irq(host->host_lock);
563 rq->ref_count++;
564 memcpy(rq->cmd, pc->c, 12);
565 blk_execute_rq_nowait(drive->queue, scsi->disk, rq, 0, NULL);
566 spin_lock_irq(host->host_lock);
567 return 0;
568abort:
569 kfree (pc);
570 if (rq)
571 blk_put_request(rq);
572 cmd->result = DID_ERROR << 16;
573 done(cmd);
574 return 0;
575}
576
577static int idescsi_eh_abort (struct scsi_cmnd *cmd)
578{
579 idescsi_scsi_t *scsi = scsihost_to_idescsi(cmd->device->host);
580 ide_drive_t *drive = scsi->drive;
581 ide_hwif_t *hwif;
582 ide_hwgroup_t *hwgroup;
583 int busy;
584 int ret = FAILED;
585
586 struct ide_atapi_pc *pc;
587
588 /* In idescsi_eh_abort we try to gently pry our command from the ide subsystem */
589
590 if (test_bit(IDESCSI_LOG_CMD, &scsi->log))
591 printk (KERN_WARNING "ide-scsi: abort called for %lu\n", cmd->serial_number);
592
593 if (!drive) {
594 printk (KERN_WARNING "ide-scsi: Drive not set in idescsi_eh_abort\n");
595 WARN_ON(1);
596 goto no_drive;
597 }
598
599 hwif = drive->hwif;
600 hwgroup = hwif->hwgroup;
601
602 /* First give it some more time, how much is "right" is hard to say :-(
603 FIXME - uses mdelay which causes latency? */
604 busy = ide_wait_not_busy(hwif, 100);
605 if (test_bit(IDESCSI_LOG_CMD, &scsi->log))
606 printk (KERN_WARNING "ide-scsi: drive did%s become ready\n", busy?" not":"");
607
608 spin_lock_irq(&hwgroup->lock);
609
610 /* If there is no pc running we're done (our interrupt took care of it) */
611 pc = drive->pc;
612 if (pc == NULL) {
613 ret = SUCCESS;
614 goto ide_unlock;
615 }
616
617 /* It's somewhere in flight. Does ide subsystem agree? */
618 if (pc->scsi_cmd->serial_number == cmd->serial_number && !busy &&
619 elv_queue_empty(drive->queue) && HWGROUP(drive)->rq != pc->rq) {
620 /*
621 * FIXME - not sure this condition can ever occur
622 */
623 printk (KERN_ERR "ide-scsi: cmd aborted!\n");
624
625 if (blk_sense_request(pc->rq))
626 kfree(pc->buf);
627 /* we need to call blk_put_request twice. */
628 blk_put_request(pc->rq);
629 blk_put_request(pc->rq);
630 kfree(pc);
631 drive->pc = NULL;
632
633 ret = SUCCESS;
634 }
635
636ide_unlock:
637 spin_unlock_irq(&hwgroup->lock);
638no_drive:
639 if (test_bit(IDESCSI_LOG_CMD, &scsi->log))
640 printk (KERN_WARNING "ide-scsi: abort returns %s\n", ret == SUCCESS?"success":"failed");
641
642 return ret;
643}
644
645static int idescsi_eh_reset (struct scsi_cmnd *cmd)
646{
647 struct request *req;
648 idescsi_scsi_t *scsi = scsihost_to_idescsi(cmd->device->host);
649 ide_drive_t *drive = scsi->drive;
650 ide_hwgroup_t *hwgroup;
651 int ready = 0;
652 int ret = SUCCESS;
653
654 struct ide_atapi_pc *pc;
655
656 /* In idescsi_eh_reset we forcefully remove the command from the ide subsystem and reset the device. */
657
658 if (test_bit(IDESCSI_LOG_CMD, &scsi->log))
659 printk (KERN_WARNING "ide-scsi: reset called for %lu\n", cmd->serial_number);
660
661 if (!drive) {
662 printk (KERN_WARNING "ide-scsi: Drive not set in idescsi_eh_reset\n");
663 WARN_ON(1);
664 return FAILED;
665 }
666
667 hwgroup = drive->hwif->hwgroup;
668
669 spin_lock_irq(cmd->device->host->host_lock);
670 spin_lock(&hwgroup->lock);
671
672 pc = drive->pc;
673 if (pc)
674 req = pc->rq;
675
676 if (pc == NULL || req != hwgroup->rq || hwgroup->handler == NULL) {
677 printk (KERN_WARNING "ide-scsi: No active request in idescsi_eh_reset\n");
678 spin_unlock(&hwgroup->lock);
679 spin_unlock_irq(cmd->device->host->host_lock);
680 return FAILED;
681 }
682
683 /* kill current request */
684 if (__blk_end_request(req, -EIO, 0))
685 BUG();
686 if (blk_sense_request(req))
687 kfree(pc->buf);
688 kfree(pc);
689 drive->pc = NULL;
690 blk_put_request(req);
691
692 /* now nuke the drive queue */
693 while ((req = elv_next_request(drive->queue))) {
694 if (__blk_end_request(req, -EIO, 0))
695 BUG();
696 }
697
698 hwgroup->rq = NULL;
699 hwgroup->handler = NULL;
700 hwgroup->busy = 1; /* will set this to zero when ide reset finished */
701 spin_unlock(&hwgroup->lock);
702
703 ide_do_reset(drive);
704
705 /* ide_do_reset starts a polling handler which restarts itself every 50ms until the reset finishes */
706
707 do {
708 spin_unlock_irq(cmd->device->host->host_lock);
709 msleep(50);
710 spin_lock_irq(cmd->device->host->host_lock);
711 } while ( HWGROUP(drive)->handler );
712
713 ready = drive_is_ready(drive);
714 HWGROUP(drive)->busy--;
715 if (!ready) {
716 printk (KERN_ERR "ide-scsi: reset failed!\n");
717 ret = FAILED;
718 }
719
720 spin_unlock_irq(cmd->device->host->host_lock);
721 return ret;
722}
723
724static int idescsi_bios(struct scsi_device *sdev, struct block_device *bdev,
725 sector_t capacity, int *parm)
726{
727 idescsi_scsi_t *idescsi = scsihost_to_idescsi(sdev->host);
728 ide_drive_t *drive = idescsi->drive;
729
730 if (drive->bios_cyl && drive->bios_head && drive->bios_sect) {
731 parm[0] = drive->bios_head;
732 parm[1] = drive->bios_sect;
733 parm[2] = drive->bios_cyl;
734 }
735 return 0;
736}
737
738static struct scsi_host_template idescsi_template = {
739 .module = THIS_MODULE,
740 .name = "idescsi",
741 .info = idescsi_info,
742 .slave_configure = idescsi_slave_configure,
743 .ioctl = idescsi_ioctl,
744 .queuecommand = idescsi_queue,
745 .eh_abort_handler = idescsi_eh_abort,
746 .eh_host_reset_handler = idescsi_eh_reset,
747 .bios_param = idescsi_bios,
748 .can_queue = 40,
749 .this_id = -1,
750 .sg_tablesize = 256,
751 .cmd_per_lun = 5,
752 .max_sectors = 128,
753 .use_clustering = DISABLE_CLUSTERING,
754 .emulated = 1,
755 .proc_name = "ide-scsi",
756};
757
758static int ide_scsi_probe(ide_drive_t *drive)
759{
760 idescsi_scsi_t *idescsi;
761 struct Scsi_Host *host;
762 struct gendisk *g;
763 static int warned;
764 int err = -ENOMEM;
765 u16 last_lun;
766
767 if (!warned && drive->media == ide_cdrom) {
768 printk(KERN_WARNING "ide-scsi is deprecated for cd burning! Use ide-cd and give dev=/dev/hdX as device\n");
769 warned = 1;
770 }
771
772 if (idescsi_nocd && drive->media == ide_cdrom)
773 return -ENODEV;
774
775 if (!strstr("ide-scsi", drive->driver_req) ||
776 drive->media == ide_disk ||
777 !(host = scsi_host_alloc(&idescsi_template,sizeof(idescsi_scsi_t))))
778 return -ENODEV;
779
780 drive->dev_flags |= IDE_DFLAG_SCSI;
781
782 g = alloc_disk(1 << PARTN_BITS);
783 if (!g)
784 goto out_host_put;
785
786 ide_init_disk(g, drive);
787
788 host->max_id = 1;
789
790 last_lun = drive->id[ATA_ID_LAST_LUN];
791 if (last_lun)
792 debug_log("%s: last_lun=%u\n", drive->name, last_lun);
793
794 if ((last_lun & 7) != 7)
795 host->max_lun = (last_lun & 7) + 1;
796 else
797 host->max_lun = 1;
798
799 drive->driver_data = host;
800 idescsi = scsihost_to_idescsi(host);
801 idescsi->drive = drive;
802 idescsi->driver = &idescsi_driver;
803 idescsi->host = host;
804 idescsi->disk = g;
805 g->private_data = &idescsi->driver;
806 err = 0;
807 idescsi_setup(drive, idescsi);
808 g->fops = &idescsi_ops;
809 ide_register_region(g);
810 err = scsi_add_host(host, &drive->gendev);
811 if (!err) {
812 scsi_scan_host(host);
813 return 0;
814 }
815 /* fall through on error */
816 ide_unregister_region(g);
817 ide_proc_unregister_driver(drive, &idescsi_driver);
818
819 put_disk(g);
820out_host_put:
821 drive->dev_flags &= ~IDE_DFLAG_SCSI;
822 scsi_host_put(host);
823 return err;
824}
825
826static int __init init_idescsi_module(void)
827{
828 return driver_register(&idescsi_driver.gen_driver);
829}
830
831static void __exit exit_idescsi_module(void)
832{
833 driver_unregister(&idescsi_driver.gen_driver);
834}
835
836module_param(idescsi_nocd, int, 0600);
837MODULE_PARM_DESC(idescsi_nocd, "Disable handling of CD-ROMs so they may be driven by ide-cd");
838module_init(init_idescsi_module);
839module_exit(exit_idescsi_module);
840MODULE_LICENSE("GPL");
generated by cgit v1.2.2 (git 2.25.0) at 2024-12-29 13:49:29 -0500