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Commit | Line | Data |
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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> | |
43 | #include <linux/hdreg.h> | |
44 | #include <linux/slab.h> | |
45 | #include <linux/ide.h> | |
46 | #include <linux/scatterlist.h> | |
df0ae249 | 47 | #include <linux/delay.h> |
e723ccd8 | 48 | #include <linux/mutex.h> |
1977f032 | 49 | #include <linux/bitops.h> |
1da177e4 LT |
50 | |
51 | #include <asm/io.h> | |
1da177e4 LT |
52 | #include <asm/uaccess.h> |
53 | ||
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> | |
59 | #include <scsi/sg.h> | |
60 | ||
61 | #define IDESCSI_DEBUG_LOG 0 | |
62 | ||
43a2b5b2 BZ |
63 | #if IDESCSI_DEBUG_LOG |
64 | #define debug_log(fmt, args...) \ | |
65 | printk(KERN_INFO "ide-scsi: " fmt, ## args) | |
66 | #else | |
67 | #define debug_log(fmt, args...) do {} while (0) | |
68 | #endif | |
69 | ||
1da177e4 LT |
70 | /* |
71 | * SCSI command transformation layer | |
72 | */ | |
1da177e4 LT |
73 | #define IDESCSI_SG_TRANSFORM 1 /* /dev/sg transformation */ |
74 | ||
75 | /* | |
76 | * Log flags | |
77 | */ | |
78 | #define IDESCSI_LOG_CMD 0 /* Log SCSI commands */ | |
79 | ||
80 | typedef struct ide_scsi_obj { | |
81 | ide_drive_t *drive; | |
82 | ide_driver_t *driver; | |
83 | struct gendisk *disk; | |
84 | struct Scsi_Host *host; | |
85 | ||
1c065787 | 86 | struct ide_atapi_pc *pc; /* Current packet command */ |
1da177e4 LT |
87 | unsigned long flags; /* Status/Action flags */ |
88 | unsigned long transform; /* SCSI cmd translation layer */ | |
89 | unsigned long log; /* log flags */ | |
90 | } idescsi_scsi_t; | |
91 | ||
e723ccd8 | 92 | static DEFINE_MUTEX(idescsi_ref_mutex); |
1c065787 BP |
93 | /* Set by module param to skip cd */ |
94 | static int idescsi_nocd; | |
1da177e4 LT |
95 | |
96 | #define ide_scsi_g(disk) \ | |
97 | container_of((disk)->private_data, struct ide_scsi_obj, driver) | |
98 | ||
99 | static struct ide_scsi_obj *ide_scsi_get(struct gendisk *disk) | |
100 | { | |
101 | struct ide_scsi_obj *scsi = NULL; | |
102 | ||
e723ccd8 | 103 | mutex_lock(&idescsi_ref_mutex); |
1da177e4 LT |
104 | scsi = ide_scsi_g(disk); |
105 | if (scsi) | |
106 | scsi_host_get(scsi->host); | |
e723ccd8 | 107 | mutex_unlock(&idescsi_ref_mutex); |
1da177e4 LT |
108 | return scsi; |
109 | } | |
110 | ||
111 | static void ide_scsi_put(struct ide_scsi_obj *scsi) | |
112 | { | |
e723ccd8 | 113 | mutex_lock(&idescsi_ref_mutex); |
1da177e4 | 114 | scsi_host_put(scsi->host); |
e723ccd8 | 115 | mutex_unlock(&idescsi_ref_mutex); |
1da177e4 LT |
116 | } |
117 | ||
118 | static inline idescsi_scsi_t *scsihost_to_idescsi(struct Scsi_Host *host) | |
119 | { | |
120 | return (idescsi_scsi_t*) (&host[1]); | |
121 | } | |
122 | ||
123 | static inline idescsi_scsi_t *drive_to_idescsi(ide_drive_t *ide_drive) | |
124 | { | |
125 | return scsihost_to_idescsi(ide_drive->driver_data); | |
126 | } | |
127 | ||
128 | /* | |
129 | * Per ATAPI device status bits. | |
130 | */ | |
131 | #define IDESCSI_DRQ_INTERRUPT 0 /* DRQ interrupt device */ | |
132 | ||
133 | /* | |
134 | * ide-scsi requests. | |
135 | */ | |
136 | #define IDESCSI_PC_RQ 90 | |
137 | ||
1da177e4 | 138 | /* |
3e52fb4d | 139 | * PIO data transfer routine using the scatter gather table. |
1da177e4 | 140 | */ |
3e52fb4d BZ |
141 | static void ide_scsi_io_buffers(ide_drive_t *drive, struct ide_atapi_pc *pc, |
142 | unsigned int bcount, int write) | |
1da177e4 | 143 | { |
9567b349 | 144 | ide_hwif_t *hwif = drive->hwif; |
3e52fb4d | 145 | xfer_func_t *xf = write ? hwif->output_data : hwif->input_data; |
1da177e4 | 146 | char *buf; |
1da177e4 | 147 | int count; |
1da177e4 LT |
148 | |
149 | while (bcount) { | |
1da177e4 | 150 | count = min(pc->sg->length - pc->b_count, bcount); |
45711f1a | 151 | if (PageHighMem(sg_page(pc->sg))) { |
a717f773 AM |
152 | unsigned long flags; |
153 | ||
154 | local_irq_save(flags); | |
45711f1a | 155 | buf = kmap_atomic(sg_page(pc->sg), KM_IRQ0) + |
3e52fb4d BZ |
156 | pc->sg->offset; |
157 | xf(drive, NULL, buf + pc->b_count, count); | |
a717f773 AM |
158 | kunmap_atomic(buf - pc->sg->offset, KM_IRQ0); |
159 | local_irq_restore(flags); | |
160 | } else { | |
45711f1a | 161 | buf = sg_virt(pc->sg); |
3e52fb4d | 162 | xf(drive, NULL, buf + pc->b_count, count); |
a717f773 AM |
163 | } |
164 | bcount -= count; pc->b_count += count; | |
1da177e4 | 165 | if (pc->b_count == pc->sg->length) { |
c79d88b7 | 166 | if (!--pc->sg_cnt) |
d274a987 JA |
167 | break; |
168 | pc->sg = sg_next(pc->sg); | |
1da177e4 LT |
169 | pc->b_count = 0; |
170 | } | |
171 | } | |
d274a987 JA |
172 | |
173 | if (bcount) { | |
3e52fb4d BZ |
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); | |
d274a987 | 178 | } |
1da177e4 LT |
179 | } |
180 | ||
69ae6fee BZ |
181 | static void ide_scsi_hex_dump(u8 *data, int len) |
182 | { | |
183 | print_hex_dump(KERN_CONT, "", DUMP_PREFIX_NONE, 16, 1, data, len, 0); | |
184 | } | |
185 | ||
c6b2d260 BZ |
186 | static int idescsi_end_request(ide_drive_t *, int, int); |
187 | ||
188 | static void ide_scsi_callback(ide_drive_t *drive) | |
189 | { | |
190 | idescsi_scsi_t *scsi = drive_to_idescsi(drive); | |
191 | struct ide_atapi_pc *pc = scsi->pc; | |
192 | ||
193 | if (pc->flags & PC_FLAG_TIMEDOUT) | |
194 | debug_log("%s: got timed out packet %lu at %lu\n", __func__, | |
195 | pc->scsi_cmd->serial_number, jiffies); | |
196 | /* end this request now - scsi should retry it*/ | |
197 | else if (test_bit(IDESCSI_LOG_CMD, &scsi->log)) | |
198 | printk(KERN_INFO "Packet command completed, %d bytes" | |
199 | " transferred\n", pc->xferred); | |
200 | ||
201 | idescsi_end_request(drive, 1, 0); | |
202 | } | |
203 | ||
1c065787 BP |
204 | static int idescsi_check_condition(ide_drive_t *drive, |
205 | struct request *failed_cmd) | |
1da177e4 LT |
206 | { |
207 | idescsi_scsi_t *scsi = drive_to_idescsi(drive); | |
1c065787 | 208 | struct ide_atapi_pc *pc; |
1da177e4 LT |
209 | struct request *rq; |
210 | u8 *buf; | |
211 | ||
212 | /* stuff a sense request in front of our current request */ | |
1c065787 | 213 | pc = kzalloc(sizeof(struct ide_atapi_pc), GFP_ATOMIC); |
41ead3c9 MK |
214 | rq = kmalloc(sizeof(struct request), GFP_ATOMIC); |
215 | buf = kzalloc(SCSI_SENSE_BUFFERSIZE, GFP_ATOMIC); | |
216 | if (!pc || !rq || !buf) { | |
c9475cb0 JJ |
217 | kfree(buf); |
218 | kfree(rq); | |
219 | kfree(pc); | |
1da177e4 LT |
220 | return -ENOMEM; |
221 | } | |
124cafc5 | 222 | blk_rq_init(NULL, rq); |
1da177e4 LT |
223 | rq->special = (char *) pc; |
224 | pc->rq = rq; | |
1c065787 | 225 | pc->buf = buf; |
1da177e4 | 226 | pc->c[0] = REQUEST_SENSE; |
1c065787 | 227 | pc->c[4] = pc->req_xfer = pc->buf_size = SCSI_SENSE_BUFFERSIZE; |
4aff5e23 | 228 | rq->cmd_type = REQ_TYPE_SENSE; |
e8a96aa7 | 229 | rq->cmd_flags |= REQ_PREEMPT; |
1da177e4 | 230 | pc->timeout = jiffies + WAIT_READY; |
c6b2d260 | 231 | pc->callback = ide_scsi_callback; |
1da177e4 | 232 | /* NOTE! Save the failed packet command in "rq->buffer" */ |
1c065787 BP |
233 | rq->buffer = (void *) failed_cmd->special; |
234 | pc->scsi_cmd = ((struct ide_atapi_pc *) failed_cmd->special)->scsi_cmd; | |
1da177e4 LT |
235 | if (test_bit(IDESCSI_LOG_CMD, &scsi->log)) { |
236 | printk ("ide-scsi: %s: queue cmd = ", drive->name); | |
69ae6fee | 237 | ide_scsi_hex_dump(pc->c, 6); |
1da177e4 LT |
238 | } |
239 | rq->rq_disk = scsi->disk; | |
63f5abb0 FT |
240 | ide_do_drive_cmd(drive, rq); |
241 | return 0; | |
1da177e4 LT |
242 | } |
243 | ||
1da177e4 LT |
244 | static ide_startstop_t |
245 | idescsi_atapi_error(ide_drive_t *drive, struct request *rq, u8 stat, u8 err) | |
246 | { | |
23579a2a BZ |
247 | ide_hwif_t *hwif = drive->hwif; |
248 | ||
c47137a9 | 249 | if (ide_read_status(drive) & (BUSY_STAT | DRQ_STAT)) |
1da177e4 | 250 | /* force an abort */ |
f8c4bd0a | 251 | hwif->OUTBSYNC(hwif, WIN_IDLEIMMEDIATE, |
32b3fe4f | 252 | hwif->io_ports.command_addr); |
1da177e4 LT |
253 | |
254 | rq->errors++; | |
255 | ||
256 | idescsi_end_request(drive, 0, 0); | |
257 | ||
258 | return ide_stopped; | |
259 | } | |
260 | ||
261 | static ide_startstop_t | |
262 | idescsi_atapi_abort(ide_drive_t *drive, struct request *rq) | |
263 | { | |
43a2b5b2 | 264 | debug_log("%s called for %lu\n", __func__, |
1c065787 | 265 | ((struct ide_atapi_pc *) rq->special)->scsi_cmd->serial_number); |
43a2b5b2 | 266 | |
1da177e4 LT |
267 | rq->errors |= ERROR_MAX; |
268 | ||
269 | idescsi_end_request(drive, 0, 0); | |
270 | ||
271 | return ide_stopped; | |
272 | } | |
273 | ||
274 | static int idescsi_end_request (ide_drive_t *drive, int uptodate, int nrsecs) | |
275 | { | |
276 | idescsi_scsi_t *scsi = drive_to_idescsi(drive); | |
277 | struct request *rq = HWGROUP(drive)->rq; | |
1c065787 | 278 | struct ide_atapi_pc *pc = (struct ide_atapi_pc *) rq->special; |
1da177e4 LT |
279 | int log = test_bit(IDESCSI_LOG_CMD, &scsi->log); |
280 | struct Scsi_Host *host; | |
32565347 | 281 | int errors = rq->errors; |
1da177e4 LT |
282 | unsigned long flags; |
283 | ||
4aff5e23 | 284 | if (!blk_special_request(rq) && !blk_sense_request(rq)) { |
1da177e4 LT |
285 | ide_end_request(drive, uptodate, nrsecs); |
286 | return 0; | |
287 | } | |
288 | ide_end_drive_cmd (drive, 0, 0); | |
4aff5e23 | 289 | if (blk_sense_request(rq)) { |
1c065787 | 290 | struct ide_atapi_pc *opc = (struct ide_atapi_pc *) rq->buffer; |
1da177e4 LT |
291 | if (log) { |
292 | printk ("ide-scsi: %s: wrap up check %lu, rst = ", drive->name, opc->scsi_cmd->serial_number); | |
1c065787 | 293 | ide_scsi_hex_dump(pc->buf, 16); |
1da177e4 | 294 | } |
1c065787 BP |
295 | memcpy((void *) opc->scsi_cmd->sense_buffer, pc->buf, |
296 | SCSI_SENSE_BUFFERSIZE); | |
297 | kfree(pc->buf); | |
1da177e4 LT |
298 | kfree(pc); |
299 | kfree(rq); | |
300 | pc = opc; | |
301 | rq = pc->rq; | |
302 | pc->scsi_cmd->result = (CHECK_CONDITION << 1) | | |
e3bfae4c BP |
303 | (((pc->flags & PC_FLAG_TIMEDOUT) ? |
304 | DID_TIME_OUT : | |
305 | DID_OK) << 16); | |
306 | } else if (pc->flags & PC_FLAG_TIMEDOUT) { | |
1da177e4 LT |
307 | if (log) |
308 | printk (KERN_WARNING "ide-scsi: %s: timed out for %lu\n", | |
309 | drive->name, pc->scsi_cmd->serial_number); | |
310 | pc->scsi_cmd->result = DID_TIME_OUT << 16; | |
32565347 | 311 | } else if (errors >= ERROR_MAX) { |
1da177e4 LT |
312 | pc->scsi_cmd->result = DID_ERROR << 16; |
313 | if (log) | |
314 | printk ("ide-scsi: %s: I/O error for %lu\n", drive->name, pc->scsi_cmd->serial_number); | |
32565347 | 315 | } else if (errors) { |
1da177e4 LT |
316 | if (log) |
317 | printk ("ide-scsi: %s: check condition for %lu\n", drive->name, pc->scsi_cmd->serial_number); | |
318 | if (!idescsi_check_condition(drive, rq)) | |
319 | /* we started a request sense, so we'll be back, exit for now */ | |
320 | return 0; | |
321 | pc->scsi_cmd->result = (CHECK_CONDITION << 1) | (DID_OK << 16); | |
322 | } else { | |
323 | pc->scsi_cmd->result = DID_OK << 16; | |
1da177e4 LT |
324 | } |
325 | host = pc->scsi_cmd->device->host; | |
326 | spin_lock_irqsave(host->host_lock, flags); | |
327 | pc->done(pc->scsi_cmd); | |
328 | spin_unlock_irqrestore(host->host_lock, flags); | |
329 | kfree(pc); | |
330 | kfree(rq); | |
331 | scsi->pc = NULL; | |
332 | return 0; | |
333 | } | |
334 | ||
1c065787 | 335 | static inline unsigned long get_timeout(struct ide_atapi_pc *pc) |
1da177e4 LT |
336 | { |
337 | return max_t(unsigned long, WAIT_CMD, pc->timeout - jiffies); | |
338 | } | |
339 | ||
340 | static int idescsi_expiry(ide_drive_t *drive) | |
341 | { | |
d1be0a82 | 342 | idescsi_scsi_t *scsi = drive_to_idescsi(drive); |
1c065787 | 343 | struct ide_atapi_pc *pc = scsi->pc; |
1da177e4 | 344 | |
43a2b5b2 BZ |
345 | debug_log("%s called for %lu at %lu\n", __func__, |
346 | pc->scsi_cmd->serial_number, jiffies); | |
347 | ||
e3bfae4c | 348 | pc->flags |= PC_FLAG_TIMEDOUT; |
1da177e4 LT |
349 | |
350 | return 0; /* we do not want the ide subsystem to retry */ | |
351 | } | |
352 | ||
353 | /* | |
354 | * Our interrupt handler. | |
355 | */ | |
356 | static ide_startstop_t idescsi_pc_intr (ide_drive_t *drive) | |
357 | { | |
358 | idescsi_scsi_t *scsi = drive_to_idescsi(drive); | |
1c065787 | 359 | struct ide_atapi_pc *pc = scsi->pc; |
1da177e4 | 360 | |
646c0cb6 BZ |
361 | return ide_pc_intr(drive, pc, idescsi_pc_intr, get_timeout(pc), |
362 | idescsi_expiry, NULL, NULL, NULL, | |
363 | ide_scsi_io_buffers); | |
1da177e4 LT |
364 | } |
365 | ||
366 | static ide_startstop_t idescsi_transfer_pc(ide_drive_t *drive) | |
367 | { | |
1da177e4 | 368 | idescsi_scsi_t *scsi = drive_to_idescsi(drive); |
c8c51129 | 369 | |
594c16d8 BZ |
370 | return ide_transfer_pc(drive, scsi->pc, idescsi_pc_intr, |
371 | get_timeout(scsi->pc), idescsi_expiry); | |
1da177e4 LT |
372 | } |
373 | ||
1c065787 | 374 | static inline int idescsi_set_direction(struct ide_atapi_pc *pc) |
1da177e4 LT |
375 | { |
376 | switch (pc->c[0]) { | |
377 | case READ_6: case READ_10: case READ_12: | |
e3bfae4c | 378 | pc->flags &= ~PC_FLAG_WRITING; |
1da177e4 LT |
379 | return 0; |
380 | case WRITE_6: case WRITE_10: case WRITE_12: | |
e3bfae4c | 381 | pc->flags |= PC_FLAG_WRITING; |
1da177e4 LT |
382 | return 0; |
383 | default: | |
384 | return 1; | |
385 | } | |
386 | } | |
387 | ||
1c065787 | 388 | static int idescsi_map_sg(ide_drive_t *drive, struct ide_atapi_pc *pc) |
1da177e4 LT |
389 | { |
390 | ide_hwif_t *hwif = drive->hwif; | |
391 | struct scatterlist *sg, *scsi_sg; | |
392 | int segments; | |
393 | ||
1c065787 | 394 | if (!pc->req_xfer || pc->req_xfer % 1024) |
1da177e4 LT |
395 | return 1; |
396 | ||
397 | if (idescsi_set_direction(pc)) | |
398 | return 1; | |
399 | ||
400 | sg = hwif->sg_table; | |
427d0bd4 BH |
401 | scsi_sg = scsi_sglist(pc->scsi_cmd); |
402 | segments = scsi_sg_count(pc->scsi_cmd); | |
1da177e4 LT |
403 | |
404 | if (segments > hwif->sg_max_nents) | |
405 | return 1; | |
406 | ||
427d0bd4 BH |
407 | hwif->sg_nents = segments; |
408 | memcpy(sg, scsi_sg, sizeof(*sg) * segments); | |
1da177e4 LT |
409 | |
410 | return 0; | |
411 | } | |
412 | ||
1c065787 BP |
413 | static ide_startstop_t idescsi_issue_pc(ide_drive_t *drive, |
414 | struct ide_atapi_pc *pc) | |
1da177e4 LT |
415 | { |
416 | idescsi_scsi_t *scsi = drive_to_idescsi(drive); | |
1da177e4 | 417 | |
1c065787 BP |
418 | /* Set the current packet command */ |
419 | scsi->pc = pc; | |
1da177e4 | 420 | |
6bf1641c BZ |
421 | return ide_issue_pc(drive, pc, idescsi_transfer_pc, |
422 | get_timeout(pc), idescsi_expiry); | |
1da177e4 LT |
423 | } |
424 | ||
425 | /* | |
426 | * idescsi_do_request is our request handling function. | |
427 | */ | |
428 | static ide_startstop_t idescsi_do_request (ide_drive_t *drive, struct request *rq, sector_t block) | |
429 | { | |
43a2b5b2 BZ |
430 | debug_log("dev: %s, cmd: %x, errors: %d\n", rq->rq_disk->disk_name, |
431 | rq->cmd[0], rq->errors); | |
432 | debug_log("sector: %ld, nr_sectors: %ld, current_nr_sectors: %d\n", | |
433 | rq->sector, rq->nr_sectors, rq->current_nr_sectors); | |
1da177e4 | 434 | |
4aff5e23 | 435 | if (blk_sense_request(rq) || blk_special_request(rq)) { |
4cc19689 | 436 | struct ide_atapi_pc *pc = (struct ide_atapi_pc *)rq->special; |
28c7214b BZ |
437 | idescsi_scsi_t *scsi = drive_to_idescsi(drive); |
438 | ||
439 | if (test_bit(IDESCSI_DRQ_INTERRUPT, &scsi->flags)) | |
440 | pc->flags |= PC_FLAG_DRQ_INTERRUPT; | |
4cc19689 BZ |
441 | |
442 | if (drive->using_dma && !idescsi_map_sg(drive, pc)) | |
443 | pc->flags |= PC_FLAG_DMA_OK; | |
444 | ||
445 | return idescsi_issue_pc(drive, pc); | |
1da177e4 LT |
446 | } |
447 | blk_dump_rq_flags(rq, "ide-scsi: unsup command"); | |
448 | idescsi_end_request (drive, 0, 0); | |
449 | return ide_stopped; | |
450 | } | |
451 | ||
7662d046 | 452 | #ifdef CONFIG_IDE_PROC_FS |
1da177e4 LT |
453 | static void idescsi_add_settings(ide_drive_t *drive) |
454 | { | |
455 | idescsi_scsi_t *scsi = drive_to_idescsi(drive); | |
456 | ||
457 | /* | |
1497943e | 458 | * drive setting name read/write data type min max mul_factor div_factor data pointer set function |
1da177e4 | 459 | */ |
1497943e BZ |
460 | ide_add_setting(drive, "bios_cyl", SETTING_RW, TYPE_INT, 0, 1023, 1, 1, &drive->bios_cyl, NULL); |
461 | ide_add_setting(drive, "bios_head", SETTING_RW, TYPE_BYTE, 0, 255, 1, 1, &drive->bios_head, NULL); | |
462 | ide_add_setting(drive, "bios_sect", SETTING_RW, TYPE_BYTE, 0, 63, 1, 1, &drive->bios_sect, NULL); | |
463 | ide_add_setting(drive, "transform", SETTING_RW, TYPE_INT, 0, 3, 1, 1, &scsi->transform, NULL); | |
464 | ide_add_setting(drive, "log", SETTING_RW, TYPE_INT, 0, 1, 1, 1, &scsi->log, NULL); | |
1da177e4 | 465 | } |
7662d046 BZ |
466 | #else |
467 | static inline void idescsi_add_settings(ide_drive_t *drive) { ; } | |
468 | #endif | |
1da177e4 LT |
469 | |
470 | /* | |
471 | * Driver initialization. | |
472 | */ | |
473 | static void idescsi_setup (ide_drive_t *drive, idescsi_scsi_t *scsi) | |
474 | { | |
1da177e4 LT |
475 | if (drive->id && (drive->id->config & 0x0060) == 0x20) |
476 | set_bit (IDESCSI_DRQ_INTERRUPT, &scsi->flags); | |
1da177e4 LT |
477 | clear_bit(IDESCSI_SG_TRANSFORM, &scsi->transform); |
478 | #if IDESCSI_DEBUG_LOG | |
479 | set_bit(IDESCSI_LOG_CMD, &scsi->log); | |
480 | #endif /* IDESCSI_DEBUG_LOG */ | |
481 | idescsi_add_settings(drive); | |
1da177e4 LT |
482 | } |
483 | ||
b62735d9 | 484 | static void ide_scsi_remove(ide_drive_t *drive) |
1da177e4 LT |
485 | { |
486 | struct Scsi_Host *scsihost = drive->driver_data; | |
487 | struct ide_scsi_obj *scsi = scsihost_to_idescsi(scsihost); | |
488 | struct gendisk *g = scsi->disk; | |
489 | ||
6fdea8db | 490 | scsi_remove_host(scsihost); |
7662d046 | 491 | ide_proc_unregister_driver(drive, scsi->driver); |
1da177e4 LT |
492 | |
493 | ide_unregister_region(g); | |
494 | ||
495 | drive->driver_data = NULL; | |
496 | g->private_data = NULL; | |
497 | put_disk(g); | |
498 | ||
1da177e4 | 499 | ide_scsi_put(scsi); |
f83cbc77 BZ |
500 | |
501 | drive->scsi = 0; | |
1da177e4 LT |
502 | } |
503 | ||
b62735d9 | 504 | static int ide_scsi_probe(ide_drive_t *); |
1da177e4 | 505 | |
ecfd80e4 | 506 | #ifdef CONFIG_IDE_PROC_FS |
1da177e4 LT |
507 | static ide_proc_entry_t idescsi_proc[] = { |
508 | { "capacity", S_IFREG|S_IRUGO, proc_ide_read_capacity, NULL }, | |
509 | { NULL, 0, NULL, NULL } | |
510 | }; | |
1da177e4 LT |
511 | #endif |
512 | ||
1da177e4 | 513 | static ide_driver_t idescsi_driver = { |
8604affd | 514 | .gen_driver = { |
4ef3b8f4 | 515 | .owner = THIS_MODULE, |
8604affd BZ |
516 | .name = "ide-scsi", |
517 | .bus = &ide_bus_type, | |
8604affd | 518 | }, |
b62735d9 MP |
519 | .probe = ide_scsi_probe, |
520 | .remove = ide_scsi_remove, | |
1da177e4 LT |
521 | .version = IDESCSI_VERSION, |
522 | .media = ide_scsi, | |
1da177e4 | 523 | .supports_dsc_overlap = 0, |
1da177e4 LT |
524 | .do_request = idescsi_do_request, |
525 | .end_request = idescsi_end_request, | |
526 | .error = idescsi_atapi_error, | |
527 | .abort = idescsi_atapi_abort, | |
7662d046 BZ |
528 | #ifdef CONFIG_IDE_PROC_FS |
529 | .proc = idescsi_proc, | |
530 | #endif | |
1da177e4 LT |
531 | }; |
532 | ||
533 | static int idescsi_ide_open(struct inode *inode, struct file *filp) | |
534 | { | |
535 | struct gendisk *disk = inode->i_bdev->bd_disk; | |
536 | struct ide_scsi_obj *scsi; | |
1da177e4 LT |
537 | |
538 | if (!(scsi = ide_scsi_get(disk))) | |
539 | return -ENXIO; | |
540 | ||
1da177e4 LT |
541 | return 0; |
542 | } | |
543 | ||
544 | static int idescsi_ide_release(struct inode *inode, struct file *filp) | |
545 | { | |
546 | struct gendisk *disk = inode->i_bdev->bd_disk; | |
547 | struct ide_scsi_obj *scsi = ide_scsi_g(disk); | |
1da177e4 LT |
548 | |
549 | ide_scsi_put(scsi); | |
550 | ||
551 | return 0; | |
552 | } | |
553 | ||
554 | static int idescsi_ide_ioctl(struct inode *inode, struct file *file, | |
555 | unsigned int cmd, unsigned long arg) | |
556 | { | |
557 | struct block_device *bdev = inode->i_bdev; | |
558 | struct ide_scsi_obj *scsi = ide_scsi_g(bdev->bd_disk); | |
559 | return generic_ide_ioctl(scsi->drive, file, bdev, cmd, arg); | |
560 | } | |
561 | ||
562 | static struct block_device_operations idescsi_ops = { | |
563 | .owner = THIS_MODULE, | |
564 | .open = idescsi_ide_open, | |
565 | .release = idescsi_ide_release, | |
566 | .ioctl = idescsi_ide_ioctl, | |
567 | }; | |
568 | ||
1da177e4 LT |
569 | static int idescsi_slave_configure(struct scsi_device * sdp) |
570 | { | |
571 | /* Configure detected device */ | |
427d0bd4 BH |
572 | sdp->use_10_for_rw = 1; |
573 | sdp->use_10_for_ms = 1; | |
1da177e4 LT |
574 | scsi_adjust_queue_depth(sdp, MSG_SIMPLE_TAG, sdp->host->cmd_per_lun); |
575 | return 0; | |
576 | } | |
577 | ||
578 | static const char *idescsi_info (struct Scsi_Host *host) | |
579 | { | |
580 | return "SCSI host adapter emulation for IDE ATAPI devices"; | |
581 | } | |
582 | ||
583 | static int idescsi_ioctl (struct scsi_device *dev, int cmd, void __user *arg) | |
584 | { | |
585 | idescsi_scsi_t *scsi = scsihost_to_idescsi(dev->host); | |
586 | ||
587 | if (cmd == SG_SET_TRANSFORM) { | |
588 | if (arg) | |
589 | set_bit(IDESCSI_SG_TRANSFORM, &scsi->transform); | |
590 | else | |
591 | clear_bit(IDESCSI_SG_TRANSFORM, &scsi->transform); | |
592 | return 0; | |
593 | } else if (cmd == SG_GET_TRANSFORM) | |
594 | return put_user(test_bit(IDESCSI_SG_TRANSFORM, &scsi->transform), (int __user *) arg); | |
595 | return -EINVAL; | |
596 | } | |
597 | ||
1da177e4 LT |
598 | static int idescsi_queue (struct scsi_cmnd *cmd, |
599 | void (*done)(struct scsi_cmnd *)) | |
600 | { | |
601 | struct Scsi_Host *host = cmd->device->host; | |
602 | idescsi_scsi_t *scsi = scsihost_to_idescsi(host); | |
603 | ide_drive_t *drive = scsi->drive; | |
604 | struct request *rq = NULL; | |
1c065787 | 605 | struct ide_atapi_pc *pc = NULL; |
1da177e4 LT |
606 | |
607 | if (!drive) { | |
017560fc | 608 | scmd_printk (KERN_ERR, cmd, "drive not present\n"); |
1da177e4 LT |
609 | goto abort; |
610 | } | |
611 | scsi = drive_to_idescsi(drive); | |
1c065787 BP |
612 | pc = kmalloc(sizeof(struct ide_atapi_pc), GFP_ATOMIC); |
613 | rq = kmalloc(sizeof(struct request), GFP_ATOMIC); | |
1da177e4 LT |
614 | if (rq == NULL || pc == NULL) { |
615 | printk (KERN_ERR "ide-scsi: %s: out of memory\n", drive->name); | |
616 | goto abort; | |
617 | } | |
618 | ||
619 | memset (pc->c, 0, 12); | |
620 | pc->flags = 0; | |
6c60bd8e BZ |
621 | if (cmd->sc_data_direction == DMA_TO_DEVICE) |
622 | pc->flags |= PC_FLAG_WRITING; | |
1da177e4 LT |
623 | pc->rq = rq; |
624 | memcpy (pc->c, cmd->cmnd, cmd->cmd_len); | |
1c065787 | 625 | pc->buf = NULL; |
427d0bd4 | 626 | pc->sg = scsi_sglist(cmd); |
c79d88b7 | 627 | pc->sg_cnt = scsi_sg_count(cmd); |
1da177e4 | 628 | pc->b_count = 0; |
1c065787 | 629 | pc->req_xfer = pc->buf_size = scsi_bufflen(cmd); |
1da177e4 LT |
630 | pc->scsi_cmd = cmd; |
631 | pc->done = done; | |
632 | pc->timeout = jiffies + cmd->timeout_per_command; | |
c6b2d260 | 633 | pc->callback = ide_scsi_callback; |
1da177e4 | 634 | |
1da177e4 LT |
635 | if (test_bit(IDESCSI_LOG_CMD, &scsi->log)) { |
636 | printk ("ide-scsi: %s: que %lu, cmd = ", drive->name, cmd->serial_number); | |
69ae6fee | 637 | ide_scsi_hex_dump(cmd->cmnd, cmd->cmd_len); |
1da177e4 LT |
638 | if (memcmp(pc->c, cmd->cmnd, cmd->cmd_len)) { |
639 | printk ("ide-scsi: %s: que %lu, tsl = ", drive->name, cmd->serial_number); | |
69ae6fee | 640 | ide_scsi_hex_dump(pc->c, 12); |
1da177e4 LT |
641 | } |
642 | } | |
643 | ||
124cafc5 | 644 | blk_rq_init(NULL, rq); |
1da177e4 | 645 | rq->special = (char *) pc; |
4aff5e23 | 646 | rq->cmd_type = REQ_TYPE_SPECIAL; |
1da177e4 | 647 | spin_unlock_irq(host->host_lock); |
7e12ca11 | 648 | blk_execute_rq_nowait(drive->queue, scsi->disk, rq, 0, NULL); |
1da177e4 LT |
649 | spin_lock_irq(host->host_lock); |
650 | return 0; | |
651 | abort: | |
c9475cb0 JJ |
652 | kfree (pc); |
653 | kfree (rq); | |
1da177e4 LT |
654 | cmd->result = DID_ERROR << 16; |
655 | done(cmd); | |
656 | return 0; | |
657 | } | |
658 | ||
659 | static int idescsi_eh_abort (struct scsi_cmnd *cmd) | |
660 | { | |
661 | idescsi_scsi_t *scsi = scsihost_to_idescsi(cmd->device->host); | |
662 | ide_drive_t *drive = scsi->drive; | |
663 | int busy; | |
664 | int ret = FAILED; | |
665 | ||
666 | /* In idescsi_eh_abort we try to gently pry our command from the ide subsystem */ | |
667 | ||
668 | if (test_bit(IDESCSI_LOG_CMD, &scsi->log)) | |
669 | printk (KERN_WARNING "ide-scsi: abort called for %lu\n", cmd->serial_number); | |
670 | ||
671 | if (!drive) { | |
672 | printk (KERN_WARNING "ide-scsi: Drive not set in idescsi_eh_abort\n"); | |
673 | WARN_ON(1); | |
674 | goto no_drive; | |
675 | } | |
676 | ||
677 | /* First give it some more time, how much is "right" is hard to say :-( */ | |
678 | ||
679 | busy = ide_wait_not_busy(HWIF(drive), 100); /* FIXME - uses mdelay which causes latency? */ | |
680 | if (test_bit(IDESCSI_LOG_CMD, &scsi->log)) | |
681 | printk (KERN_WARNING "ide-scsi: drive did%s become ready\n", busy?" not":""); | |
682 | ||
683 | spin_lock_irq(&ide_lock); | |
684 | ||
685 | /* If there is no pc running we're done (our interrupt took care of it) */ | |
686 | if (!scsi->pc) { | |
687 | ret = SUCCESS; | |
688 | goto ide_unlock; | |
689 | } | |
690 | ||
691 | /* It's somewhere in flight. Does ide subsystem agree? */ | |
692 | if (scsi->pc->scsi_cmd->serial_number == cmd->serial_number && !busy && | |
693 | elv_queue_empty(drive->queue) && HWGROUP(drive)->rq != scsi->pc->rq) { | |
694 | /* | |
695 | * FIXME - not sure this condition can ever occur | |
696 | */ | |
697 | printk (KERN_ERR "ide-scsi: cmd aborted!\n"); | |
698 | ||
4aff5e23 | 699 | if (blk_sense_request(scsi->pc->rq)) |
1c065787 | 700 | kfree(scsi->pc->buf); |
1da177e4 LT |
701 | kfree(scsi->pc->rq); |
702 | kfree(scsi->pc); | |
703 | scsi->pc = NULL; | |
704 | ||
705 | ret = SUCCESS; | |
706 | } | |
707 | ||
708 | ide_unlock: | |
709 | spin_unlock_irq(&ide_lock); | |
710 | no_drive: | |
711 | if (test_bit(IDESCSI_LOG_CMD, &scsi->log)) | |
712 | printk (KERN_WARNING "ide-scsi: abort returns %s\n", ret == SUCCESS?"success":"failed"); | |
713 | ||
714 | return ret; | |
715 | } | |
716 | ||
717 | static int idescsi_eh_reset (struct scsi_cmnd *cmd) | |
718 | { | |
719 | struct request *req; | |
720 | idescsi_scsi_t *scsi = scsihost_to_idescsi(cmd->device->host); | |
721 | ide_drive_t *drive = scsi->drive; | |
722 | int ready = 0; | |
723 | int ret = SUCCESS; | |
724 | ||
725 | /* In idescsi_eh_reset we forcefully remove the command from the ide subsystem and reset the device. */ | |
726 | ||
727 | if (test_bit(IDESCSI_LOG_CMD, &scsi->log)) | |
728 | printk (KERN_WARNING "ide-scsi: reset called for %lu\n", cmd->serial_number); | |
729 | ||
730 | if (!drive) { | |
731 | printk (KERN_WARNING "ide-scsi: Drive not set in idescsi_eh_reset\n"); | |
732 | WARN_ON(1); | |
733 | return FAILED; | |
734 | } | |
735 | ||
df0ae249 JG |
736 | spin_lock_irq(cmd->device->host->host_lock); |
737 | spin_lock(&ide_lock); | |
1da177e4 LT |
738 | |
739 | if (!scsi->pc || (req = scsi->pc->rq) != HWGROUP(drive)->rq || !HWGROUP(drive)->handler) { | |
740 | printk (KERN_WARNING "ide-scsi: No active request in idescsi_eh_reset\n"); | |
741 | spin_unlock(&ide_lock); | |
df0ae249 | 742 | spin_unlock_irq(cmd->device->host->host_lock); |
1da177e4 LT |
743 | return FAILED; |
744 | } | |
745 | ||
746 | /* kill current request */ | |
5a330e39 KU |
747 | if (__blk_end_request(req, -EIO, 0)) |
748 | BUG(); | |
4aff5e23 | 749 | if (blk_sense_request(req)) |
1c065787 | 750 | kfree(scsi->pc->buf); |
1da177e4 LT |
751 | kfree(scsi->pc); |
752 | scsi->pc = NULL; | |
753 | kfree(req); | |
754 | ||
755 | /* now nuke the drive queue */ | |
756 | while ((req = elv_next_request(drive->queue))) { | |
5a330e39 KU |
757 | if (__blk_end_request(req, -EIO, 0)) |
758 | BUG(); | |
1da177e4 LT |
759 | } |
760 | ||
761 | HWGROUP(drive)->rq = NULL; | |
762 | HWGROUP(drive)->handler = NULL; | |
763 | HWGROUP(drive)->busy = 1; /* will set this to zero when ide reset finished */ | |
df0ae249 | 764 | spin_unlock(&ide_lock); |
1da177e4 LT |
765 | |
766 | ide_do_reset(drive); | |
767 | ||
768 | /* ide_do_reset starts a polling handler which restarts itself every 50ms until the reset finishes */ | |
769 | ||
770 | do { | |
1da177e4 | 771 | spin_unlock_irq(cmd->device->host->host_lock); |
df0ae249 | 772 | msleep(50); |
1da177e4 LT |
773 | spin_lock_irq(cmd->device->host->host_lock); |
774 | } while ( HWGROUP(drive)->handler ); | |
775 | ||
776 | ready = drive_is_ready(drive); | |
777 | HWGROUP(drive)->busy--; | |
778 | if (!ready) { | |
779 | printk (KERN_ERR "ide-scsi: reset failed!\n"); | |
780 | ret = FAILED; | |
781 | } | |
782 | ||
df0ae249 | 783 | spin_unlock_irq(cmd->device->host->host_lock); |
1da177e4 LT |
784 | return ret; |
785 | } | |
786 | ||
787 | static int idescsi_bios(struct scsi_device *sdev, struct block_device *bdev, | |
788 | sector_t capacity, int *parm) | |
789 | { | |
790 | idescsi_scsi_t *idescsi = scsihost_to_idescsi(sdev->host); | |
791 | ide_drive_t *drive = idescsi->drive; | |
792 | ||
793 | if (drive->bios_cyl && drive->bios_head && drive->bios_sect) { | |
794 | parm[0] = drive->bios_head; | |
795 | parm[1] = drive->bios_sect; | |
796 | parm[2] = drive->bios_cyl; | |
797 | } | |
798 | return 0; | |
799 | } | |
800 | ||
801 | static struct scsi_host_template idescsi_template = { | |
802 | .module = THIS_MODULE, | |
803 | .name = "idescsi", | |
804 | .info = idescsi_info, | |
805 | .slave_configure = idescsi_slave_configure, | |
806 | .ioctl = idescsi_ioctl, | |
807 | .queuecommand = idescsi_queue, | |
808 | .eh_abort_handler = idescsi_eh_abort, | |
809 | .eh_host_reset_handler = idescsi_eh_reset, | |
810 | .bios_param = idescsi_bios, | |
811 | .can_queue = 40, | |
812 | .this_id = -1, | |
813 | .sg_tablesize = 256, | |
814 | .cmd_per_lun = 5, | |
815 | .max_sectors = 128, | |
816 | .use_clustering = DISABLE_CLUSTERING, | |
817 | .emulated = 1, | |
818 | .proc_name = "ide-scsi", | |
819 | }; | |
820 | ||
b62735d9 | 821 | static int ide_scsi_probe(ide_drive_t *drive) |
1da177e4 LT |
822 | { |
823 | idescsi_scsi_t *idescsi; | |
824 | struct Scsi_Host *host; | |
825 | struct gendisk *g; | |
826 | static int warned; | |
827 | int err = -ENOMEM; | |
828 | ||
829 | if (!warned && drive->media == ide_cdrom) { | |
830 | printk(KERN_WARNING "ide-scsi is deprecated for cd burning! Use ide-cd and give dev=/dev/hdX as device\n"); | |
831 | warned = 1; | |
832 | } | |
833 | ||
aaeab80b AC |
834 | if (idescsi_nocd && drive->media == ide_cdrom) |
835 | return -ENODEV; | |
836 | ||
1da177e4 LT |
837 | if (!strstr("ide-scsi", drive->driver_req) || |
838 | !drive->present || | |
839 | drive->media == ide_disk || | |
840 | !(host = scsi_host_alloc(&idescsi_template,sizeof(idescsi_scsi_t)))) | |
8604affd | 841 | return -ENODEV; |
1da177e4 | 842 | |
f83cbc77 BZ |
843 | drive->scsi = 1; |
844 | ||
1da177e4 LT |
845 | g = alloc_disk(1 << PARTN_BITS); |
846 | if (!g) | |
847 | goto out_host_put; | |
848 | ||
849 | ide_init_disk(g, drive); | |
850 | ||
851 | host->max_id = 1; | |
852 | ||
1da177e4 | 853 | if (drive->id->last_lun) |
43a2b5b2 BZ |
854 | debug_log("%s: id->last_lun=%u\n", drive->name, |
855 | drive->id->last_lun); | |
856 | ||
1da177e4 LT |
857 | if ((drive->id->last_lun & 0x7) != 7) |
858 | host->max_lun = (drive->id->last_lun & 0x7) + 1; | |
859 | else | |
860 | host->max_lun = 1; | |
861 | ||
862 | drive->driver_data = host; | |
863 | idescsi = scsihost_to_idescsi(host); | |
864 | idescsi->drive = drive; | |
865 | idescsi->driver = &idescsi_driver; | |
866 | idescsi->host = host; | |
867 | idescsi->disk = g; | |
868 | g->private_data = &idescsi->driver; | |
7662d046 | 869 | ide_proc_register_driver(drive, &idescsi_driver); |
8604affd BZ |
870 | err = 0; |
871 | idescsi_setup(drive, idescsi); | |
872 | g->fops = &idescsi_ops; | |
873 | ide_register_region(g); | |
874 | err = scsi_add_host(host, &drive->gendev); | |
1da177e4 | 875 | if (!err) { |
8604affd BZ |
876 | scsi_scan_host(host); |
877 | return 0; | |
1da177e4 | 878 | } |
8604affd BZ |
879 | /* fall through on error */ |
880 | ide_unregister_region(g); | |
7662d046 | 881 | ide_proc_unregister_driver(drive, &idescsi_driver); |
1da177e4 LT |
882 | |
883 | put_disk(g); | |
884 | out_host_put: | |
f83cbc77 | 885 | drive->scsi = 0; |
1da177e4 LT |
886 | scsi_host_put(host); |
887 | return err; | |
888 | } | |
889 | ||
890 | static int __init init_idescsi_module(void) | |
891 | { | |
8604affd | 892 | return driver_register(&idescsi_driver.gen_driver); |
1da177e4 LT |
893 | } |
894 | ||
895 | static void __exit exit_idescsi_module(void) | |
896 | { | |
8604affd | 897 | driver_unregister(&idescsi_driver.gen_driver); |
1da177e4 LT |
898 | } |
899 | ||
aaeab80b AC |
900 | module_param(idescsi_nocd, int, 0600); |
901 | MODULE_PARM_DESC(idescsi_nocd, "Disable handling of CD-ROMs so they may be driven by ide-cd"); | |
1da177e4 LT |
902 | module_init(init_idescsi_module); |
903 | module_exit(exit_idescsi_module); | |
904 | MODULE_LICENSE("GPL"); |