Commit | Line | Data |
---|---|---|
1da177e4 | 1 | /* |
59bca8cc BZ |
2 | * Copyright (C) 1996-1999 Gadi Oxman <gadio@netvision.net.il> |
3 | * Copyright (C) 2004-2005 Bartlomiej Zolnierkiewicz | |
1da177e4 LT |
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> | |
1da177e4 LT |
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> | |
1da177e4 LT |
43 | #include <linux/slab.h> |
44 | #include <linux/ide.h> | |
45 | #include <linux/scatterlist.h> | |
df0ae249 | 46 | #include <linux/delay.h> |
e723ccd8 | 47 | #include <linux/mutex.h> |
1977f032 | 48 | #include <linux/bitops.h> |
1da177e4 LT |
49 | |
50 | #include <asm/io.h> | |
1da177e4 LT |
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 | ||
43a2b5b2 BZ |
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 | ||
1da177e4 LT |
69 | /* |
70 | * SCSI command transformation layer | |
71 | */ | |
1da177e4 LT |
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 | ||
79 | typedef struct ide_scsi_obj { | |
80 | ide_drive_t *drive; | |
81 | ide_driver_t *driver; | |
82 | struct gendisk *disk; | |
83 | struct Scsi_Host *host; | |
84 | ||
1da177e4 LT |
85 | unsigned long transform; /* SCSI cmd translation layer */ |
86 | unsigned long log; /* log flags */ | |
87 | } idescsi_scsi_t; | |
88 | ||
e723ccd8 | 89 | static DEFINE_MUTEX(idescsi_ref_mutex); |
1c065787 BP |
90 | /* Set by module param to skip cd */ |
91 | static int idescsi_nocd; | |
1da177e4 LT |
92 | |
93 | #define ide_scsi_g(disk) \ | |
94 | container_of((disk)->private_data, struct ide_scsi_obj, driver) | |
95 | ||
96 | static struct ide_scsi_obj *ide_scsi_get(struct gendisk *disk) | |
97 | { | |
98 | struct ide_scsi_obj *scsi = NULL; | |
99 | ||
e723ccd8 | 100 | mutex_lock(&idescsi_ref_mutex); |
1da177e4 | 101 | scsi = ide_scsi_g(disk); |
08da591e | 102 | if (scsi) { |
d3e33ff5 | 103 | if (ide_device_get(scsi->drive)) |
08da591e | 104 | scsi = NULL; |
d3e33ff5 BZ |
105 | else |
106 | scsi_host_get(scsi->host); | |
08da591e | 107 | } |
e723ccd8 | 108 | mutex_unlock(&idescsi_ref_mutex); |
1da177e4 LT |
109 | return scsi; |
110 | } | |
111 | ||
112 | static void ide_scsi_put(struct ide_scsi_obj *scsi) | |
113 | { | |
d3e33ff5 BZ |
114 | ide_drive_t *drive = scsi->drive; |
115 | ||
e723ccd8 | 116 | mutex_lock(&idescsi_ref_mutex); |
1da177e4 | 117 | scsi_host_put(scsi->host); |
d3e33ff5 | 118 | ide_device_put(drive); |
e723ccd8 | 119 | mutex_unlock(&idescsi_ref_mutex); |
1da177e4 LT |
120 | } |
121 | ||
122 | static inline idescsi_scsi_t *scsihost_to_idescsi(struct Scsi_Host *host) | |
123 | { | |
124 | return (idescsi_scsi_t*) (&host[1]); | |
125 | } | |
126 | ||
127 | static inline idescsi_scsi_t *drive_to_idescsi(ide_drive_t *ide_drive) | |
128 | { | |
129 | return scsihost_to_idescsi(ide_drive->driver_data); | |
130 | } | |
131 | ||
69ae6fee BZ |
132 | static 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 | ||
c6b2d260 BZ |
137 | static int idescsi_end_request(ide_drive_t *, int, int); |
138 | ||
b14c7212 | 139 | static void ide_scsi_callback(ide_drive_t *drive, int dsc) |
c6b2d260 BZ |
140 | { |
141 | idescsi_scsi_t *scsi = drive_to_idescsi(drive); | |
2b9efba4 | 142 | struct ide_atapi_pc *pc = drive->pc; |
c6b2d260 BZ |
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 | ||
1c065787 BP |
155 | static int idescsi_check_condition(ide_drive_t *drive, |
156 | struct request *failed_cmd) | |
1da177e4 LT |
157 | { |
158 | idescsi_scsi_t *scsi = drive_to_idescsi(drive); | |
1c065787 | 159 | struct ide_atapi_pc *pc; |
1da177e4 LT |
160 | struct request *rq; |
161 | u8 *buf; | |
162 | ||
163 | /* stuff a sense request in front of our current request */ | |
1c065787 | 164 | pc = kzalloc(sizeof(struct ide_atapi_pc), GFP_ATOMIC); |
e27420d0 | 165 | rq = blk_get_request(drive->queue, READ, GFP_ATOMIC); |
41ead3c9 MK |
166 | buf = kzalloc(SCSI_SENSE_BUFFERSIZE, GFP_ATOMIC); |
167 | if (!pc || !rq || !buf) { | |
c9475cb0 | 168 | kfree(buf); |
e27420d0 FT |
169 | if (rq) |
170 | blk_put_request(rq); | |
c9475cb0 | 171 | kfree(pc); |
1da177e4 LT |
172 | return -ENOMEM; |
173 | } | |
1da177e4 LT |
174 | rq->special = (char *) pc; |
175 | pc->rq = rq; | |
1c065787 | 176 | pc->buf = buf; |
1da177e4 | 177 | pc->c[0] = REQUEST_SENSE; |
1c065787 | 178 | pc->c[4] = pc->req_xfer = pc->buf_size = SCSI_SENSE_BUFFERSIZE; |
4aff5e23 | 179 | rq->cmd_type = REQ_TYPE_SENSE; |
e8a96aa7 | 180 | rq->cmd_flags |= REQ_PREEMPT; |
1da177e4 LT |
181 | pc->timeout = jiffies + WAIT_READY; |
182 | /* NOTE! Save the failed packet command in "rq->buffer" */ | |
1c065787 BP |
183 | rq->buffer = (void *) failed_cmd->special; |
184 | pc->scsi_cmd = ((struct ide_atapi_pc *) failed_cmd->special)->scsi_cmd; | |
1da177e4 LT |
185 | if (test_bit(IDESCSI_LOG_CMD, &scsi->log)) { |
186 | printk ("ide-scsi: %s: queue cmd = ", drive->name); | |
69ae6fee | 187 | ide_scsi_hex_dump(pc->c, 6); |
1da177e4 LT |
188 | } |
189 | rq->rq_disk = scsi->disk; | |
e27420d0 | 190 | rq->ref_count++; |
08feacf3 | 191 | memcpy(rq->cmd, pc->c, 12); |
63f5abb0 FT |
192 | ide_do_drive_cmd(drive, rq); |
193 | return 0; | |
1da177e4 LT |
194 | } |
195 | ||
1da177e4 LT |
196 | static ide_startstop_t |
197 | idescsi_atapi_error(ide_drive_t *drive, struct request *rq, u8 stat, u8 err) | |
198 | { | |
23579a2a BZ |
199 | ide_hwif_t *hwif = drive->hwif; |
200 | ||
3a7d2484 | 201 | if (hwif->tp_ops->read_status(hwif) & (ATA_BUSY | ATA_DRQ)) |
1da177e4 | 202 | /* force an abort */ |
aaaade3f | 203 | hwif->tp_ops->exec_command(hwif, ATA_CMD_IDLEIMMEDIATE); |
1da177e4 LT |
204 | |
205 | rq->errors++; | |
206 | ||
207 | idescsi_end_request(drive, 0, 0); | |
208 | ||
209 | return ide_stopped; | |
210 | } | |
211 | ||
1da177e4 LT |
212 | static 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; | |
1c065787 | 216 | struct ide_atapi_pc *pc = (struct ide_atapi_pc *) rq->special; |
1da177e4 LT |
217 | int log = test_bit(IDESCSI_LOG_CMD, &scsi->log); |
218 | struct Scsi_Host *host; | |
32565347 | 219 | int errors = rq->errors; |
1da177e4 LT |
220 | unsigned long flags; |
221 | ||
4aff5e23 | 222 | if (!blk_special_request(rq) && !blk_sense_request(rq)) { |
1da177e4 LT |
223 | ide_end_request(drive, uptodate, nrsecs); |
224 | return 0; | |
225 | } | |
226 | ide_end_drive_cmd (drive, 0, 0); | |
4aff5e23 | 227 | if (blk_sense_request(rq)) { |
1c065787 | 228 | struct ide_atapi_pc *opc = (struct ide_atapi_pc *) rq->buffer; |
1da177e4 LT |
229 | if (log) { |
230 | printk ("ide-scsi: %s: wrap up check %lu, rst = ", drive->name, opc->scsi_cmd->serial_number); | |
1c065787 | 231 | ide_scsi_hex_dump(pc->buf, 16); |
1da177e4 | 232 | } |
1c065787 BP |
233 | memcpy((void *) opc->scsi_cmd->sense_buffer, pc->buf, |
234 | SCSI_SENSE_BUFFERSIZE); | |
235 | kfree(pc->buf); | |
1da177e4 | 236 | kfree(pc); |
e27420d0 | 237 | blk_put_request(rq); |
1da177e4 LT |
238 | pc = opc; |
239 | rq = pc->rq; | |
240 | pc->scsi_cmd->result = (CHECK_CONDITION << 1) | | |
e3bfae4c BP |
241 | (((pc->flags & PC_FLAG_TIMEDOUT) ? |
242 | DID_TIME_OUT : | |
243 | DID_OK) << 16); | |
244 | } else if (pc->flags & PC_FLAG_TIMEDOUT) { | |
1da177e4 LT |
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; | |
32565347 | 249 | } else if (errors >= ERROR_MAX) { |
1da177e4 LT |
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); | |
32565347 | 253 | } else if (errors) { |
1da177e4 LT |
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; | |
1da177e4 LT |
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); | |
e27420d0 | 268 | blk_put_request(rq); |
2b9efba4 | 269 | drive->pc = NULL; |
1da177e4 LT |
270 | return 0; |
271 | } | |
272 | ||
1c065787 | 273 | static inline int idescsi_set_direction(struct ide_atapi_pc *pc) |
1da177e4 LT |
274 | { |
275 | switch (pc->c[0]) { | |
276 | case READ_6: case READ_10: case READ_12: | |
e3bfae4c | 277 | pc->flags &= ~PC_FLAG_WRITING; |
1da177e4 LT |
278 | return 0; |
279 | case WRITE_6: case WRITE_10: case WRITE_12: | |
e3bfae4c | 280 | pc->flags |= PC_FLAG_WRITING; |
1da177e4 LT |
281 | return 0; |
282 | default: | |
283 | return 1; | |
284 | } | |
285 | } | |
286 | ||
1c065787 | 287 | static int idescsi_map_sg(ide_drive_t *drive, struct ide_atapi_pc *pc) |
1da177e4 LT |
288 | { |
289 | ide_hwif_t *hwif = drive->hwif; | |
290 | struct scatterlist *sg, *scsi_sg; | |
291 | int segments; | |
292 | ||
1c065787 | 293 | if (!pc->req_xfer || pc->req_xfer % 1024) |
1da177e4 LT |
294 | return 1; |
295 | ||
296 | if (idescsi_set_direction(pc)) | |
297 | return 1; | |
298 | ||
299 | sg = hwif->sg_table; | |
427d0bd4 BH |
300 | scsi_sg = scsi_sglist(pc->scsi_cmd); |
301 | segments = scsi_sg_count(pc->scsi_cmd); | |
1da177e4 LT |
302 | |
303 | if (segments > hwif->sg_max_nents) | |
304 | return 1; | |
305 | ||
427d0bd4 BH |
306 | hwif->sg_nents = segments; |
307 | memcpy(sg, scsi_sg, sizeof(*sg) * segments); | |
1da177e4 LT |
308 | |
309 | return 0; | |
310 | } | |
311 | ||
1c065787 BP |
312 | static ide_startstop_t idescsi_issue_pc(ide_drive_t *drive, |
313 | struct ide_atapi_pc *pc) | |
1da177e4 | 314 | { |
1c065787 | 315 | /* Set the current packet command */ |
2b9efba4 | 316 | drive->pc = pc; |
1da177e4 | 317 | |
baf08f0b | 318 | return ide_issue_pc(drive, ide_scsi_get_timeout(pc), ide_scsi_expiry); |
1da177e4 LT |
319 | } |
320 | ||
321 | /* | |
322 | * idescsi_do_request is our request handling function. | |
323 | */ | |
324 | static ide_startstop_t idescsi_do_request (ide_drive_t *drive, struct request *rq, sector_t block) | |
325 | { | |
43a2b5b2 BZ |
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); | |
1da177e4 | 330 | |
4aff5e23 | 331 | if (blk_sense_request(rq) || blk_special_request(rq)) { |
4cc19689 BZ |
332 | struct ide_atapi_pc *pc = (struct ide_atapi_pc *)rq->special; |
333 | ||
97100fc8 BZ |
334 | if ((drive->dev_flags & IDE_DFLAG_USING_DMA) && |
335 | idescsi_map_sg(drive, pc) == 0) | |
4cc19689 BZ |
336 | pc->flags |= PC_FLAG_DMA_OK; |
337 | ||
338 | return idescsi_issue_pc(drive, pc); | |
1da177e4 LT |
339 | } |
340 | blk_dump_rq_flags(rq, "ide-scsi: unsup command"); | |
341 | idescsi_end_request (drive, 0, 0); | |
342 | return ide_stopped; | |
343 | } | |
344 | ||
7662d046 | 345 | #ifdef CONFIG_IDE_PROC_FS |
79cb3803 BZ |
346 | static ide_proc_entry_t idescsi_proc[] = { |
347 | { "capacity", S_IFREG|S_IRUGO, proc_ide_read_capacity, NULL }, | |
348 | { NULL, 0, NULL, NULL } | |
349 | }; | |
350 | ||
8185d5aa BZ |
351 | #define ide_scsi_devset_get(name, field) \ |
352 | static int get_##name(ide_drive_t *drive) \ | |
353 | { \ | |
354 | idescsi_scsi_t *scsi = drive_to_idescsi(drive); \ | |
355 | return scsi->field; \ | |
356 | } | |
1da177e4 | 357 | |
8185d5aa BZ |
358 | #define ide_scsi_devset_set(name, field) \ |
359 | static 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; \ | |
1da177e4 | 364 | } |
8185d5aa | 365 | |
92f1f8fd | 366 | #define ide_scsi_devset_rw_field(_name, _field) \ |
8185d5aa BZ |
367 | ide_scsi_devset_get(_name, _field); \ |
368 | ide_scsi_devset_set(_name, _field); \ | |
92f1f8fd EO |
369 | IDE_DEVSET(_name, DS_SYNC, get_##_name, set_##_name); |
370 | ||
371 | ide_devset_rw_field(bios_cyl, bios_cyl); | |
372 | ide_devset_rw_field(bios_head, bios_head); | |
373 | ide_devset_rw_field(bios_sect, bios_sect); | |
374 | ||
375 | ide_scsi_devset_rw_field(transform, transform); | |
376 | ide_scsi_devset_rw_field(log, log); | |
377 | ||
378 | static 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 }, | |
8185d5aa | 385 | }; |
79cb3803 BZ |
386 | |
387 | static ide_proc_entry_t *ide_scsi_proc_entries(ide_drive_t *drive) | |
388 | { | |
389 | return idescsi_proc; | |
390 | } | |
391 | ||
392 | static const struct ide_proc_devset *ide_scsi_proc_devsets(ide_drive_t *drive) | |
393 | { | |
394 | return idescsi_settings; | |
395 | } | |
7662d046 | 396 | #endif |
1da177e4 LT |
397 | |
398 | /* | |
399 | * Driver initialization. | |
400 | */ | |
401 | static void idescsi_setup (ide_drive_t *drive, idescsi_scsi_t *scsi) | |
402 | { | |
1da177e4 LT |
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 */ | |
db9d2869 | 407 | |
85e39035 BZ |
408 | drive->pc_callback = ide_scsi_callback; |
409 | drive->pc_update_buffers = NULL; | |
410 | drive->pc_io_buffers = ide_io_buffers; | |
db9d2869 | 411 | |
1e874f44 | 412 | ide_proc_register_driver(drive, scsi->driver); |
1da177e4 LT |
413 | } |
414 | ||
b62735d9 | 415 | static void ide_scsi_remove(ide_drive_t *drive) |
1da177e4 LT |
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 | ||
6fdea8db | 421 | scsi_remove_host(scsihost); |
7662d046 | 422 | ide_proc_unregister_driver(drive, scsi->driver); |
1da177e4 LT |
423 | |
424 | ide_unregister_region(g); | |
425 | ||
426 | drive->driver_data = NULL; | |
427 | g->private_data = NULL; | |
428 | put_disk(g); | |
429 | ||
1da177e4 | 430 | ide_scsi_put(scsi); |
f83cbc77 | 431 | |
97100fc8 | 432 | drive->dev_flags &= ~IDE_DFLAG_SCSI; |
1da177e4 LT |
433 | } |
434 | ||
b62735d9 | 435 | static int ide_scsi_probe(ide_drive_t *); |
1da177e4 | 436 | |
1da177e4 | 437 | static ide_driver_t idescsi_driver = { |
8604affd | 438 | .gen_driver = { |
4ef3b8f4 | 439 | .owner = THIS_MODULE, |
8604affd BZ |
440 | .name = "ide-scsi", |
441 | .bus = &ide_bus_type, | |
8604affd | 442 | }, |
b62735d9 MP |
443 | .probe = ide_scsi_probe, |
444 | .remove = ide_scsi_remove, | |
1da177e4 | 445 | .version = IDESCSI_VERSION, |
1da177e4 LT |
446 | .do_request = idescsi_do_request, |
447 | .end_request = idescsi_end_request, | |
448 | .error = idescsi_atapi_error, | |
7662d046 | 449 | #ifdef CONFIG_IDE_PROC_FS |
79cb3803 BZ |
450 | .proc_entries = ide_scsi_proc_entries, |
451 | .proc_devsets = ide_scsi_proc_devsets, | |
7662d046 | 452 | #endif |
1da177e4 LT |
453 | }; |
454 | ||
3e3c9c6f | 455 | static int idescsi_ide_open(struct block_device *bdev, fmode_t mode) |
1da177e4 | 456 | { |
3e3c9c6f | 457 | struct ide_scsi_obj *scsi = ide_scsi_get(bdev->bd_disk); |
1da177e4 | 458 | |
3e3c9c6f | 459 | if (!scsi) |
1da177e4 LT |
460 | return -ENXIO; |
461 | ||
1da177e4 LT |
462 | return 0; |
463 | } | |
464 | ||
3e3c9c6f | 465 | static int idescsi_ide_release(struct gendisk *disk, fmode_t mode) |
1da177e4 | 466 | { |
3e3c9c6f | 467 | ide_scsi_put(ide_scsi_g(disk)); |
1da177e4 LT |
468 | return 0; |
469 | } | |
470 | ||
3e3c9c6f | 471 | static int idescsi_ide_ioctl(struct block_device *bdev, fmode_t mode, |
1da177e4 LT |
472 | unsigned int cmd, unsigned long arg) |
473 | { | |
1da177e4 | 474 | struct ide_scsi_obj *scsi = ide_scsi_g(bdev->bd_disk); |
1bddd9e6 | 475 | return generic_ide_ioctl(scsi->drive, bdev, cmd, arg); |
1da177e4 LT |
476 | } |
477 | ||
478 | static struct block_device_operations idescsi_ops = { | |
479 | .owner = THIS_MODULE, | |
3e3c9c6f AV |
480 | .open = idescsi_ide_open, |
481 | .release = idescsi_ide_release, | |
482 | .locked_ioctl = idescsi_ide_ioctl, | |
1da177e4 LT |
483 | }; |
484 | ||
1da177e4 LT |
485 | static int idescsi_slave_configure(struct scsi_device * sdp) |
486 | { | |
487 | /* Configure detected device */ | |
427d0bd4 BH |
488 | sdp->use_10_for_rw = 1; |
489 | sdp->use_10_for_ms = 1; | |
1da177e4 LT |
490 | scsi_adjust_queue_depth(sdp, MSG_SIMPLE_TAG, sdp->host->cmd_per_lun); |
491 | return 0; | |
492 | } | |
493 | ||
494 | static const char *idescsi_info (struct Scsi_Host *host) | |
495 | { | |
496 | return "SCSI host adapter emulation for IDE ATAPI devices"; | |
497 | } | |
498 | ||
499 | static 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 | ||
1da177e4 LT |
514 | static 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; | |
1c065787 | 521 | struct ide_atapi_pc *pc = NULL; |
e27420d0 | 522 | int write = cmd->sc_data_direction == DMA_TO_DEVICE; |
1da177e4 LT |
523 | |
524 | if (!drive) { | |
017560fc | 525 | scmd_printk (KERN_ERR, cmd, "drive not present\n"); |
1da177e4 LT |
526 | goto abort; |
527 | } | |
528 | scsi = drive_to_idescsi(drive); | |
1c065787 | 529 | pc = kmalloc(sizeof(struct ide_atapi_pc), GFP_ATOMIC); |
e27420d0 | 530 | rq = blk_get_request(drive->queue, write, GFP_ATOMIC); |
1da177e4 LT |
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; | |
6c60bd8e BZ |
538 | if (cmd->sc_data_direction == DMA_TO_DEVICE) |
539 | pc->flags |= PC_FLAG_WRITING; | |
1da177e4 LT |
540 | pc->rq = rq; |
541 | memcpy (pc->c, cmd->cmnd, cmd->cmd_len); | |
1c065787 | 542 | pc->buf = NULL; |
427d0bd4 | 543 | pc->sg = scsi_sglist(cmd); |
c79d88b7 | 544 | pc->sg_cnt = scsi_sg_count(cmd); |
1da177e4 | 545 | pc->b_count = 0; |
1c065787 | 546 | pc->req_xfer = pc->buf_size = scsi_bufflen(cmd); |
1da177e4 LT |
547 | pc->scsi_cmd = cmd; |
548 | pc->done = done; | |
242f9dcb | 549 | pc->timeout = jiffies + cmd->request->timeout; |
1da177e4 | 550 | |
1da177e4 LT |
551 | if (test_bit(IDESCSI_LOG_CMD, &scsi->log)) { |
552 | printk ("ide-scsi: %s: que %lu, cmd = ", drive->name, cmd->serial_number); | |
69ae6fee | 553 | ide_scsi_hex_dump(cmd->cmnd, cmd->cmd_len); |
1da177e4 LT |
554 | if (memcmp(pc->c, cmd->cmnd, cmd->cmd_len)) { |
555 | printk ("ide-scsi: %s: que %lu, tsl = ", drive->name, cmd->serial_number); | |
69ae6fee | 556 | ide_scsi_hex_dump(pc->c, 12); |
1da177e4 LT |
557 | } |
558 | } | |
559 | ||
1da177e4 | 560 | rq->special = (char *) pc; |
4aff5e23 | 561 | rq->cmd_type = REQ_TYPE_SPECIAL; |
1da177e4 | 562 | spin_unlock_irq(host->host_lock); |
e27420d0 | 563 | rq->ref_count++; |
08feacf3 | 564 | memcpy(rq->cmd, pc->c, 12); |
7e12ca11 | 565 | blk_execute_rq_nowait(drive->queue, scsi->disk, rq, 0, NULL); |
1da177e4 LT |
566 | spin_lock_irq(host->host_lock); |
567 | return 0; | |
568 | abort: | |
c9475cb0 | 569 | kfree (pc); |
e27420d0 FT |
570 | if (rq) |
571 | blk_put_request(rq); | |
1da177e4 LT |
572 | cmd->result = DID_ERROR << 16; |
573 | done(cmd); | |
574 | return 0; | |
575 | } | |
576 | ||
577 | static 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 | int busy; | |
582 | int ret = FAILED; | |
583 | ||
2b9efba4 BZ |
584 | struct ide_atapi_pc *pc; |
585 | ||
1da177e4 LT |
586 | /* In idescsi_eh_abort we try to gently pry our command from the ide subsystem */ |
587 | ||
588 | if (test_bit(IDESCSI_LOG_CMD, &scsi->log)) | |
589 | printk (KERN_WARNING "ide-scsi: abort called for %lu\n", cmd->serial_number); | |
590 | ||
591 | if (!drive) { | |
592 | printk (KERN_WARNING "ide-scsi: Drive not set in idescsi_eh_abort\n"); | |
593 | WARN_ON(1); | |
594 | goto no_drive; | |
595 | } | |
596 | ||
597 | /* First give it some more time, how much is "right" is hard to say :-( */ | |
598 | ||
599 | busy = ide_wait_not_busy(HWIF(drive), 100); /* FIXME - uses mdelay which causes latency? */ | |
600 | if (test_bit(IDESCSI_LOG_CMD, &scsi->log)) | |
601 | printk (KERN_WARNING "ide-scsi: drive did%s become ready\n", busy?" not":""); | |
602 | ||
603 | spin_lock_irq(&ide_lock); | |
604 | ||
605 | /* If there is no pc running we're done (our interrupt took care of it) */ | |
2b9efba4 BZ |
606 | pc = drive->pc; |
607 | if (pc == NULL) { | |
1da177e4 LT |
608 | ret = SUCCESS; |
609 | goto ide_unlock; | |
610 | } | |
611 | ||
612 | /* It's somewhere in flight. Does ide subsystem agree? */ | |
2b9efba4 BZ |
613 | if (pc->scsi_cmd->serial_number == cmd->serial_number && !busy && |
614 | elv_queue_empty(drive->queue) && HWGROUP(drive)->rq != pc->rq) { | |
1da177e4 LT |
615 | /* |
616 | * FIXME - not sure this condition can ever occur | |
617 | */ | |
618 | printk (KERN_ERR "ide-scsi: cmd aborted!\n"); | |
619 | ||
2b9efba4 BZ |
620 | if (blk_sense_request(pc->rq)) |
621 | kfree(pc->buf); | |
e27420d0 | 622 | /* we need to call blk_put_request twice. */ |
2b9efba4 BZ |
623 | blk_put_request(pc->rq); |
624 | blk_put_request(pc->rq); | |
625 | kfree(pc); | |
626 | drive->pc = NULL; | |
1da177e4 LT |
627 | |
628 | ret = SUCCESS; | |
629 | } | |
630 | ||
631 | ide_unlock: | |
632 | spin_unlock_irq(&ide_lock); | |
633 | no_drive: | |
634 | if (test_bit(IDESCSI_LOG_CMD, &scsi->log)) | |
635 | printk (KERN_WARNING "ide-scsi: abort returns %s\n", ret == SUCCESS?"success":"failed"); | |
636 | ||
637 | return ret; | |
638 | } | |
639 | ||
640 | static int idescsi_eh_reset (struct scsi_cmnd *cmd) | |
641 | { | |
642 | struct request *req; | |
643 | idescsi_scsi_t *scsi = scsihost_to_idescsi(cmd->device->host); | |
644 | ide_drive_t *drive = scsi->drive; | |
645 | int ready = 0; | |
646 | int ret = SUCCESS; | |
647 | ||
2b9efba4 BZ |
648 | struct ide_atapi_pc *pc; |
649 | ||
1da177e4 LT |
650 | /* In idescsi_eh_reset we forcefully remove the command from the ide subsystem and reset the device. */ |
651 | ||
652 | if (test_bit(IDESCSI_LOG_CMD, &scsi->log)) | |
653 | printk (KERN_WARNING "ide-scsi: reset called for %lu\n", cmd->serial_number); | |
654 | ||
655 | if (!drive) { | |
656 | printk (KERN_WARNING "ide-scsi: Drive not set in idescsi_eh_reset\n"); | |
657 | WARN_ON(1); | |
658 | return FAILED; | |
659 | } | |
660 | ||
df0ae249 JG |
661 | spin_lock_irq(cmd->device->host->host_lock); |
662 | spin_lock(&ide_lock); | |
1da177e4 | 663 | |
2b9efba4 BZ |
664 | pc = drive->pc; |
665 | ||
666 | if (pc == NULL || (req = pc->rq) != HWGROUP(drive)->rq || !HWGROUP(drive)->handler) { | |
1da177e4 LT |
667 | printk (KERN_WARNING "ide-scsi: No active request in idescsi_eh_reset\n"); |
668 | spin_unlock(&ide_lock); | |
df0ae249 | 669 | spin_unlock_irq(cmd->device->host->host_lock); |
1da177e4 LT |
670 | return FAILED; |
671 | } | |
672 | ||
673 | /* kill current request */ | |
5a330e39 KU |
674 | if (__blk_end_request(req, -EIO, 0)) |
675 | BUG(); | |
4aff5e23 | 676 | if (blk_sense_request(req)) |
2b9efba4 BZ |
677 | kfree(pc->buf); |
678 | kfree(pc); | |
679 | drive->pc = NULL; | |
e27420d0 | 680 | blk_put_request(req); |
1da177e4 LT |
681 | |
682 | /* now nuke the drive queue */ | |
683 | while ((req = elv_next_request(drive->queue))) { | |
5a330e39 KU |
684 | if (__blk_end_request(req, -EIO, 0)) |
685 | BUG(); | |
1da177e4 LT |
686 | } |
687 | ||
688 | HWGROUP(drive)->rq = NULL; | |
689 | HWGROUP(drive)->handler = NULL; | |
690 | HWGROUP(drive)->busy = 1; /* will set this to zero when ide reset finished */ | |
df0ae249 | 691 | spin_unlock(&ide_lock); |
1da177e4 LT |
692 | |
693 | ide_do_reset(drive); | |
694 | ||
695 | /* ide_do_reset starts a polling handler which restarts itself every 50ms until the reset finishes */ | |
696 | ||
697 | do { | |
1da177e4 | 698 | spin_unlock_irq(cmd->device->host->host_lock); |
df0ae249 | 699 | msleep(50); |
1da177e4 LT |
700 | spin_lock_irq(cmd->device->host->host_lock); |
701 | } while ( HWGROUP(drive)->handler ); | |
702 | ||
703 | ready = drive_is_ready(drive); | |
704 | HWGROUP(drive)->busy--; | |
705 | if (!ready) { | |
706 | printk (KERN_ERR "ide-scsi: reset failed!\n"); | |
707 | ret = FAILED; | |
708 | } | |
709 | ||
df0ae249 | 710 | spin_unlock_irq(cmd->device->host->host_lock); |
1da177e4 LT |
711 | return ret; |
712 | } | |
713 | ||
714 | static int idescsi_bios(struct scsi_device *sdev, struct block_device *bdev, | |
715 | sector_t capacity, int *parm) | |
716 | { | |
717 | idescsi_scsi_t *idescsi = scsihost_to_idescsi(sdev->host); | |
718 | ide_drive_t *drive = idescsi->drive; | |
719 | ||
720 | if (drive->bios_cyl && drive->bios_head && drive->bios_sect) { | |
721 | parm[0] = drive->bios_head; | |
722 | parm[1] = drive->bios_sect; | |
723 | parm[2] = drive->bios_cyl; | |
724 | } | |
725 | return 0; | |
726 | } | |
727 | ||
728 | static struct scsi_host_template idescsi_template = { | |
729 | .module = THIS_MODULE, | |
730 | .name = "idescsi", | |
731 | .info = idescsi_info, | |
732 | .slave_configure = idescsi_slave_configure, | |
733 | .ioctl = idescsi_ioctl, | |
734 | .queuecommand = idescsi_queue, | |
735 | .eh_abort_handler = idescsi_eh_abort, | |
736 | .eh_host_reset_handler = idescsi_eh_reset, | |
737 | .bios_param = idescsi_bios, | |
738 | .can_queue = 40, | |
739 | .this_id = -1, | |
740 | .sg_tablesize = 256, | |
741 | .cmd_per_lun = 5, | |
742 | .max_sectors = 128, | |
743 | .use_clustering = DISABLE_CLUSTERING, | |
744 | .emulated = 1, | |
745 | .proc_name = "ide-scsi", | |
746 | }; | |
747 | ||
b62735d9 | 748 | static int ide_scsi_probe(ide_drive_t *drive) |
1da177e4 LT |
749 | { |
750 | idescsi_scsi_t *idescsi; | |
751 | struct Scsi_Host *host; | |
752 | struct gendisk *g; | |
753 | static int warned; | |
754 | int err = -ENOMEM; | |
4dde4492 | 755 | u16 last_lun; |
1da177e4 LT |
756 | |
757 | if (!warned && drive->media == ide_cdrom) { | |
758 | printk(KERN_WARNING "ide-scsi is deprecated for cd burning! Use ide-cd and give dev=/dev/hdX as device\n"); | |
759 | warned = 1; | |
760 | } | |
761 | ||
aaeab80b AC |
762 | if (idescsi_nocd && drive->media == ide_cdrom) |
763 | return -ENODEV; | |
764 | ||
1da177e4 | 765 | if (!strstr("ide-scsi", drive->driver_req) || |
1da177e4 LT |
766 | drive->media == ide_disk || |
767 | !(host = scsi_host_alloc(&idescsi_template,sizeof(idescsi_scsi_t)))) | |
8604affd | 768 | return -ENODEV; |
1da177e4 | 769 | |
97100fc8 | 770 | drive->dev_flags |= IDE_DFLAG_SCSI; |
f83cbc77 | 771 | |
1da177e4 LT |
772 | g = alloc_disk(1 << PARTN_BITS); |
773 | if (!g) | |
774 | goto out_host_put; | |
775 | ||
776 | ide_init_disk(g, drive); | |
777 | ||
778 | host->max_id = 1; | |
779 | ||
4dde4492 BZ |
780 | last_lun = drive->id[ATA_ID_LAST_LUN]; |
781 | if (last_lun) | |
782 | debug_log("%s: last_lun=%u\n", drive->name, last_lun); | |
43a2b5b2 | 783 | |
4dde4492 BZ |
784 | if ((last_lun & 7) != 7) |
785 | host->max_lun = (last_lun & 7) + 1; | |
1da177e4 LT |
786 | else |
787 | host->max_lun = 1; | |
788 | ||
789 | drive->driver_data = host; | |
790 | idescsi = scsihost_to_idescsi(host); | |
791 | idescsi->drive = drive; | |
792 | idescsi->driver = &idescsi_driver; | |
793 | idescsi->host = host; | |
794 | idescsi->disk = g; | |
795 | g->private_data = &idescsi->driver; | |
8604affd BZ |
796 | err = 0; |
797 | idescsi_setup(drive, idescsi); | |
798 | g->fops = &idescsi_ops; | |
799 | ide_register_region(g); | |
800 | err = scsi_add_host(host, &drive->gendev); | |
1da177e4 | 801 | if (!err) { |
8604affd BZ |
802 | scsi_scan_host(host); |
803 | return 0; | |
1da177e4 | 804 | } |
8604affd BZ |
805 | /* fall through on error */ |
806 | ide_unregister_region(g); | |
7662d046 | 807 | ide_proc_unregister_driver(drive, &idescsi_driver); |
1da177e4 LT |
808 | |
809 | put_disk(g); | |
810 | out_host_put: | |
97100fc8 | 811 | drive->dev_flags &= ~IDE_DFLAG_SCSI; |
1da177e4 LT |
812 | scsi_host_put(host); |
813 | return err; | |
814 | } | |
815 | ||
816 | static int __init init_idescsi_module(void) | |
817 | { | |
8604affd | 818 | return driver_register(&idescsi_driver.gen_driver); |
1da177e4 LT |
819 | } |
820 | ||
821 | static void __exit exit_idescsi_module(void) | |
822 | { | |
8604affd | 823 | driver_unregister(&idescsi_driver.gen_driver); |
1da177e4 LT |
824 | } |
825 | ||
aaeab80b AC |
826 | module_param(idescsi_nocd, int, 0600); |
827 | MODULE_PARM_DESC(idescsi_nocd, "Disable handling of CD-ROMs so they may be driven by ide-cd"); | |
1da177e4 LT |
828 | module_init(init_idescsi_module); |
829 | module_exit(exit_idescsi_module); | |
830 | MODULE_LICENSE("GPL"); |