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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 | ||
1da177e4 LT |
63 | /* |
64 | * SCSI command transformation layer | |
65 | */ | |
1da177e4 LT |
66 | #define IDESCSI_SG_TRANSFORM 1 /* /dev/sg transformation */ |
67 | ||
68 | /* | |
69 | * Log flags | |
70 | */ | |
71 | #define IDESCSI_LOG_CMD 0 /* Log SCSI commands */ | |
72 | ||
73 | typedef struct ide_scsi_obj { | |
74 | ide_drive_t *drive; | |
75 | ide_driver_t *driver; | |
76 | struct gendisk *disk; | |
77 | struct Scsi_Host *host; | |
78 | ||
1c065787 | 79 | struct ide_atapi_pc *pc; /* Current packet command */ |
1da177e4 LT |
80 | unsigned long flags; /* Status/Action flags */ |
81 | unsigned long transform; /* SCSI cmd translation layer */ | |
82 | unsigned long log; /* log flags */ | |
83 | } idescsi_scsi_t; | |
84 | ||
e723ccd8 | 85 | static DEFINE_MUTEX(idescsi_ref_mutex); |
1c065787 BP |
86 | /* Set by module param to skip cd */ |
87 | static int idescsi_nocd; | |
1da177e4 LT |
88 | |
89 | #define ide_scsi_g(disk) \ | |
90 | container_of((disk)->private_data, struct ide_scsi_obj, driver) | |
91 | ||
92 | static struct ide_scsi_obj *ide_scsi_get(struct gendisk *disk) | |
93 | { | |
94 | struct ide_scsi_obj *scsi = NULL; | |
95 | ||
e723ccd8 | 96 | mutex_lock(&idescsi_ref_mutex); |
1da177e4 LT |
97 | scsi = ide_scsi_g(disk); |
98 | if (scsi) | |
99 | scsi_host_get(scsi->host); | |
e723ccd8 | 100 | mutex_unlock(&idescsi_ref_mutex); |
1da177e4 LT |
101 | return scsi; |
102 | } | |
103 | ||
104 | static void ide_scsi_put(struct ide_scsi_obj *scsi) | |
105 | { | |
e723ccd8 | 106 | mutex_lock(&idescsi_ref_mutex); |
1da177e4 | 107 | scsi_host_put(scsi->host); |
e723ccd8 | 108 | mutex_unlock(&idescsi_ref_mutex); |
1da177e4 LT |
109 | } |
110 | ||
111 | static inline idescsi_scsi_t *scsihost_to_idescsi(struct Scsi_Host *host) | |
112 | { | |
113 | return (idescsi_scsi_t*) (&host[1]); | |
114 | } | |
115 | ||
116 | static inline idescsi_scsi_t *drive_to_idescsi(ide_drive_t *ide_drive) | |
117 | { | |
118 | return scsihost_to_idescsi(ide_drive->driver_data); | |
119 | } | |
120 | ||
121 | /* | |
122 | * Per ATAPI device status bits. | |
123 | */ | |
124 | #define IDESCSI_DRQ_INTERRUPT 0 /* DRQ interrupt device */ | |
125 | ||
126 | /* | |
127 | * ide-scsi requests. | |
128 | */ | |
129 | #define IDESCSI_PC_RQ 90 | |
130 | ||
1da177e4 LT |
131 | /* |
132 | * PIO data transfer routines using the scatter gather table. | |
133 | */ | |
1c065787 BP |
134 | static void idescsi_input_buffers(ide_drive_t *drive, struct ide_atapi_pc *pc, |
135 | unsigned int bcount) | |
1da177e4 | 136 | { |
9567b349 | 137 | ide_hwif_t *hwif = drive->hwif; |
1da177e4 LT |
138 | int count; |
139 | char *buf; | |
140 | ||
141 | while (bcount) { | |
1da177e4 | 142 | count = min(pc->sg->length - pc->b_count, bcount); |
45711f1a | 143 | if (PageHighMem(sg_page(pc->sg))) { |
a717f773 AM |
144 | unsigned long flags; |
145 | ||
146 | local_irq_save(flags); | |
45711f1a | 147 | buf = kmap_atomic(sg_page(pc->sg), KM_IRQ0) + |
a717f773 | 148 | pc->sg->offset; |
9567b349 | 149 | hwif->input_data(drive, NULL, buf + pc->b_count, count); |
a717f773 AM |
150 | kunmap_atomic(buf - pc->sg->offset, KM_IRQ0); |
151 | local_irq_restore(flags); | |
152 | } else { | |
45711f1a | 153 | buf = sg_virt(pc->sg); |
9567b349 | 154 | hwif->input_data(drive, NULL, buf + pc->b_count, count); |
a717f773 AM |
155 | } |
156 | bcount -= count; pc->b_count += count; | |
1da177e4 | 157 | if (pc->b_count == pc->sg->length) { |
c79d88b7 | 158 | if (!--pc->sg_cnt) |
d274a987 JA |
159 | break; |
160 | pc->sg = sg_next(pc->sg); | |
1da177e4 LT |
161 | pc->b_count = 0; |
162 | } | |
163 | } | |
d274a987 JA |
164 | |
165 | if (bcount) { | |
166 | printk (KERN_ERR "ide-scsi: scatter gather table too small, discarding data\n"); | |
9f87abe8 | 167 | ide_pad_transfer(drive, 0, bcount); |
d274a987 | 168 | } |
1da177e4 LT |
169 | } |
170 | ||
1c065787 BP |
171 | static void idescsi_output_buffers(ide_drive_t *drive, struct ide_atapi_pc *pc, |
172 | unsigned int bcount) | |
1da177e4 | 173 | { |
9567b349 | 174 | ide_hwif_t *hwif = drive->hwif; |
1da177e4 LT |
175 | int count; |
176 | char *buf; | |
177 | ||
178 | while (bcount) { | |
1da177e4 | 179 | count = min(pc->sg->length - pc->b_count, bcount); |
45711f1a | 180 | if (PageHighMem(sg_page(pc->sg))) { |
a717f773 AM |
181 | unsigned long flags; |
182 | ||
183 | local_irq_save(flags); | |
45711f1a | 184 | buf = kmap_atomic(sg_page(pc->sg), KM_IRQ0) + |
a717f773 | 185 | pc->sg->offset; |
9567b349 | 186 | hwif->output_data(drive, NULL, buf + pc->b_count, count); |
a717f773 AM |
187 | kunmap_atomic(buf - pc->sg->offset, KM_IRQ0); |
188 | local_irq_restore(flags); | |
189 | } else { | |
45711f1a | 190 | buf = sg_virt(pc->sg); |
9567b349 | 191 | hwif->output_data(drive, NULL, buf + pc->b_count, count); |
a717f773 AM |
192 | } |
193 | bcount -= count; pc->b_count += count; | |
1da177e4 | 194 | if (pc->b_count == pc->sg->length) { |
c79d88b7 | 195 | if (!--pc->sg_cnt) |
d274a987 JA |
196 | break; |
197 | pc->sg = sg_next(pc->sg); | |
1da177e4 LT |
198 | pc->b_count = 0; |
199 | } | |
200 | } | |
d274a987 JA |
201 | |
202 | if (bcount) { | |
203 | printk (KERN_ERR "ide-scsi: scatter gather table too small, padding with zeros\n"); | |
9f87abe8 | 204 | ide_pad_transfer(drive, 1, bcount); |
d274a987 | 205 | } |
1da177e4 LT |
206 | } |
207 | ||
69ae6fee BZ |
208 | static void ide_scsi_hex_dump(u8 *data, int len) |
209 | { | |
210 | print_hex_dump(KERN_CONT, "", DUMP_PREFIX_NONE, 16, 1, data, len, 0); | |
211 | } | |
212 | ||
1c065787 BP |
213 | static int idescsi_check_condition(ide_drive_t *drive, |
214 | struct request *failed_cmd) | |
1da177e4 LT |
215 | { |
216 | idescsi_scsi_t *scsi = drive_to_idescsi(drive); | |
1c065787 | 217 | struct ide_atapi_pc *pc; |
1da177e4 LT |
218 | struct request *rq; |
219 | u8 *buf; | |
220 | ||
221 | /* stuff a sense request in front of our current request */ | |
1c065787 | 222 | pc = kzalloc(sizeof(struct ide_atapi_pc), GFP_ATOMIC); |
41ead3c9 MK |
223 | rq = kmalloc(sizeof(struct request), GFP_ATOMIC); |
224 | buf = kzalloc(SCSI_SENSE_BUFFERSIZE, GFP_ATOMIC); | |
225 | if (!pc || !rq || !buf) { | |
c9475cb0 JJ |
226 | kfree(buf); |
227 | kfree(rq); | |
228 | kfree(pc); | |
1da177e4 LT |
229 | return -ENOMEM; |
230 | } | |
1da177e4 LT |
231 | ide_init_drive_cmd(rq); |
232 | rq->special = (char *) pc; | |
233 | pc->rq = rq; | |
1c065787 | 234 | pc->buf = buf; |
1da177e4 | 235 | pc->c[0] = REQUEST_SENSE; |
1c065787 | 236 | pc->c[4] = pc->req_xfer = pc->buf_size = SCSI_SENSE_BUFFERSIZE; |
4aff5e23 | 237 | rq->cmd_type = REQ_TYPE_SENSE; |
1da177e4 LT |
238 | pc->timeout = jiffies + WAIT_READY; |
239 | /* NOTE! Save the failed packet command in "rq->buffer" */ | |
1c065787 BP |
240 | rq->buffer = (void *) failed_cmd->special; |
241 | pc->scsi_cmd = ((struct ide_atapi_pc *) failed_cmd->special)->scsi_cmd; | |
1da177e4 LT |
242 | if (test_bit(IDESCSI_LOG_CMD, &scsi->log)) { |
243 | printk ("ide-scsi: %s: queue cmd = ", drive->name); | |
69ae6fee | 244 | ide_scsi_hex_dump(pc->c, 6); |
1da177e4 LT |
245 | } |
246 | rq->rq_disk = scsi->disk; | |
247 | return ide_do_drive_cmd(drive, rq, ide_preempt); | |
248 | } | |
249 | ||
250 | static int idescsi_end_request(ide_drive_t *, int, int); | |
251 | ||
252 | static ide_startstop_t | |
253 | idescsi_atapi_error(ide_drive_t *drive, struct request *rq, u8 stat, u8 err) | |
254 | { | |
23579a2a BZ |
255 | ide_hwif_t *hwif = drive->hwif; |
256 | ||
c47137a9 | 257 | if (ide_read_status(drive) & (BUSY_STAT | DRQ_STAT)) |
1da177e4 | 258 | /* force an abort */ |
32b3fe4f BZ |
259 | hwif->OUTBSYNC(drive, WIN_IDLEIMMEDIATE, |
260 | hwif->io_ports.command_addr); | |
1da177e4 LT |
261 | |
262 | rq->errors++; | |
263 | ||
264 | idescsi_end_request(drive, 0, 0); | |
265 | ||
266 | return ide_stopped; | |
267 | } | |
268 | ||
269 | static ide_startstop_t | |
270 | idescsi_atapi_abort(ide_drive_t *drive, struct request *rq) | |
271 | { | |
272 | #if IDESCSI_DEBUG_LOG | |
273 | printk(KERN_WARNING "idescsi_atapi_abort called for %lu\n", | |
1c065787 | 274 | ((struct ide_atapi_pc *) rq->special)->scsi_cmd->serial_number); |
1da177e4 LT |
275 | #endif |
276 | rq->errors |= ERROR_MAX; | |
277 | ||
278 | idescsi_end_request(drive, 0, 0); | |
279 | ||
280 | return ide_stopped; | |
281 | } | |
282 | ||
283 | static int idescsi_end_request (ide_drive_t *drive, int uptodate, int nrsecs) | |
284 | { | |
285 | idescsi_scsi_t *scsi = drive_to_idescsi(drive); | |
286 | struct request *rq = HWGROUP(drive)->rq; | |
1c065787 | 287 | struct ide_atapi_pc *pc = (struct ide_atapi_pc *) rq->special; |
1da177e4 LT |
288 | int log = test_bit(IDESCSI_LOG_CMD, &scsi->log); |
289 | struct Scsi_Host *host; | |
32565347 | 290 | int errors = rq->errors; |
1da177e4 LT |
291 | unsigned long flags; |
292 | ||
4aff5e23 | 293 | if (!blk_special_request(rq) && !blk_sense_request(rq)) { |
1da177e4 LT |
294 | ide_end_request(drive, uptodate, nrsecs); |
295 | return 0; | |
296 | } | |
297 | ide_end_drive_cmd (drive, 0, 0); | |
4aff5e23 | 298 | if (blk_sense_request(rq)) { |
1c065787 | 299 | struct ide_atapi_pc *opc = (struct ide_atapi_pc *) rq->buffer; |
1da177e4 LT |
300 | if (log) { |
301 | printk ("ide-scsi: %s: wrap up check %lu, rst = ", drive->name, opc->scsi_cmd->serial_number); | |
1c065787 | 302 | ide_scsi_hex_dump(pc->buf, 16); |
1da177e4 | 303 | } |
1c065787 BP |
304 | memcpy((void *) opc->scsi_cmd->sense_buffer, pc->buf, |
305 | SCSI_SENSE_BUFFERSIZE); | |
306 | kfree(pc->buf); | |
1da177e4 LT |
307 | kfree(pc); |
308 | kfree(rq); | |
309 | pc = opc; | |
310 | rq = pc->rq; | |
311 | pc->scsi_cmd->result = (CHECK_CONDITION << 1) | | |
e3bfae4c BP |
312 | (((pc->flags & PC_FLAG_TIMEDOUT) ? |
313 | DID_TIME_OUT : | |
314 | DID_OK) << 16); | |
315 | } else if (pc->flags & PC_FLAG_TIMEDOUT) { | |
1da177e4 LT |
316 | if (log) |
317 | printk (KERN_WARNING "ide-scsi: %s: timed out for %lu\n", | |
318 | drive->name, pc->scsi_cmd->serial_number); | |
319 | pc->scsi_cmd->result = DID_TIME_OUT << 16; | |
32565347 | 320 | } else if (errors >= ERROR_MAX) { |
1da177e4 LT |
321 | pc->scsi_cmd->result = DID_ERROR << 16; |
322 | if (log) | |
323 | printk ("ide-scsi: %s: I/O error for %lu\n", drive->name, pc->scsi_cmd->serial_number); | |
32565347 | 324 | } else if (errors) { |
1da177e4 LT |
325 | if (log) |
326 | printk ("ide-scsi: %s: check condition for %lu\n", drive->name, pc->scsi_cmd->serial_number); | |
327 | if (!idescsi_check_condition(drive, rq)) | |
328 | /* we started a request sense, so we'll be back, exit for now */ | |
329 | return 0; | |
330 | pc->scsi_cmd->result = (CHECK_CONDITION << 1) | (DID_OK << 16); | |
331 | } else { | |
332 | pc->scsi_cmd->result = DID_OK << 16; | |
1da177e4 LT |
333 | } |
334 | host = pc->scsi_cmd->device->host; | |
335 | spin_lock_irqsave(host->host_lock, flags); | |
336 | pc->done(pc->scsi_cmd); | |
337 | spin_unlock_irqrestore(host->host_lock, flags); | |
338 | kfree(pc); | |
339 | kfree(rq); | |
340 | scsi->pc = NULL; | |
341 | return 0; | |
342 | } | |
343 | ||
1c065787 | 344 | static inline unsigned long get_timeout(struct ide_atapi_pc *pc) |
1da177e4 LT |
345 | { |
346 | return max_t(unsigned long, WAIT_CMD, pc->timeout - jiffies); | |
347 | } | |
348 | ||
349 | static int idescsi_expiry(ide_drive_t *drive) | |
350 | { | |
d1be0a82 | 351 | idescsi_scsi_t *scsi = drive_to_idescsi(drive); |
1c065787 | 352 | struct ide_atapi_pc *pc = scsi->pc; |
1da177e4 LT |
353 | |
354 | #if IDESCSI_DEBUG_LOG | |
355 | printk(KERN_WARNING "idescsi_expiry called for %lu at %lu\n", pc->scsi_cmd->serial_number, jiffies); | |
356 | #endif | |
e3bfae4c | 357 | pc->flags |= PC_FLAG_TIMEDOUT; |
1da177e4 LT |
358 | |
359 | return 0; /* we do not want the ide subsystem to retry */ | |
360 | } | |
361 | ||
362 | /* | |
363 | * Our interrupt handler. | |
364 | */ | |
365 | static ide_startstop_t idescsi_pc_intr (ide_drive_t *drive) | |
366 | { | |
367 | idescsi_scsi_t *scsi = drive_to_idescsi(drive); | |
790d1239 | 368 | ide_hwif_t *hwif = drive->hwif; |
1c065787 | 369 | struct ide_atapi_pc *pc = scsi->pc; |
1da177e4 | 370 | struct request *rq = pc->rq; |
1da177e4 | 371 | unsigned int temp; |
790d1239 | 372 | u16 bcount; |
8e7657ae | 373 | u8 stat, ireason; |
1da177e4 LT |
374 | |
375 | #if IDESCSI_DEBUG_LOG | |
376 | printk (KERN_INFO "ide-scsi: Reached idescsi_pc_intr interrupt handler\n"); | |
377 | #endif /* IDESCSI_DEBUG_LOG */ | |
378 | ||
e3bfae4c | 379 | if (pc->flags & PC_FLAG_TIMEDOUT) { |
1da177e4 LT |
380 | #if IDESCSI_DEBUG_LOG |
381 | printk(KERN_WARNING "idescsi_pc_intr: got timed out packet %lu at %lu\n", | |
382 | pc->scsi_cmd->serial_number, jiffies); | |
383 | #endif | |
384 | /* end this request now - scsi should retry it*/ | |
385 | idescsi_end_request (drive, 1, 0); | |
386 | return ide_stopped; | |
387 | } | |
e3bfae4c BP |
388 | if (pc->flags & PC_FLAG_DMA_IN_PROGRESS) { |
389 | pc->flags &= ~PC_FLAG_DMA_IN_PROGRESS; | |
1da177e4 LT |
390 | #if IDESCSI_DEBUG_LOG |
391 | printk ("ide-scsi: %s: DMA complete\n", drive->name); | |
392 | #endif /* IDESCSI_DEBUG_LOG */ | |
1c065787 | 393 | pc->xferred = pc->req_xfer; |
5e37bdc0 | 394 | (void)hwif->dma_ops->dma_end(drive); |
1da177e4 LT |
395 | } |
396 | ||
1da177e4 | 397 | /* Clear the interrupt */ |
c47137a9 | 398 | stat = ide_read_status(drive); |
1da177e4 | 399 | |
22c525b9 | 400 | if ((stat & DRQ_STAT) == 0) { |
1da177e4 LT |
401 | /* No more interrupts */ |
402 | if (test_bit(IDESCSI_LOG_CMD, &scsi->log)) | |
1c065787 BP |
403 | printk(KERN_INFO "Packet command completed, %d bytes" |
404 | " transferred\n", pc->xferred); | |
36e8e578 | 405 | local_irq_enable_in_hardirq(); |
22c525b9 | 406 | if (stat & ERR_STAT) |
1da177e4 LT |
407 | rq->errors++; |
408 | idescsi_end_request (drive, 1, 0); | |
409 | return ide_stopped; | |
410 | } | |
4c3032d8 BZ |
411 | bcount = (hwif->INB(hwif->io_ports.lbah_addr) << 8) | |
412 | hwif->INB(hwif->io_ports.lbam_addr); | |
413 | ireason = hwif->INB(hwif->io_ports.nsect_addr); | |
1da177e4 | 414 | |
8e7657ae | 415 | if (ireason & CD) { |
1da177e4 LT |
416 | printk(KERN_ERR "ide-scsi: CoD != 0 in idescsi_pc_intr\n"); |
417 | return ide_do_reset (drive); | |
418 | } | |
8e7657ae | 419 | if (ireason & IO) { |
1c065787 BP |
420 | temp = pc->xferred + bcount; |
421 | if (temp > pc->req_xfer) { | |
422 | if (temp > pc->buf_size) { | |
1da177e4 LT |
423 | printk(KERN_ERR "ide-scsi: The scsi wants to " |
424 | "send us more data than expected " | |
425 | "- discarding data\n"); | |
1c065787 | 426 | temp = pc->buf_size - pc->xferred; |
1da177e4 | 427 | if (temp) { |
e3bfae4c | 428 | pc->flags &= ~PC_FLAG_WRITING; |
1da177e4 | 429 | if (pc->sg) |
1c065787 BP |
430 | idescsi_input_buffers(drive, pc, |
431 | temp); | |
1da177e4 | 432 | else |
9567b349 BZ |
433 | hwif->input_data(drive, NULL, |
434 | pc->cur_pos, temp); | |
790d1239 BZ |
435 | printk(KERN_ERR "ide-scsi: transferred" |
436 | " %d of %d bytes\n", | |
437 | temp, bcount); | |
1da177e4 | 438 | } |
1c065787 BP |
439 | pc->xferred += temp; |
440 | pc->cur_pos += temp; | |
9f87abe8 | 441 | ide_pad_transfer(drive, 0, bcount - temp); |
1da177e4 LT |
442 | ide_set_handler(drive, &idescsi_pc_intr, get_timeout(pc), idescsi_expiry); |
443 | return ide_started; | |
444 | } | |
445 | #if IDESCSI_DEBUG_LOG | |
446 | printk (KERN_NOTICE "ide-scsi: The scsi wants to send us more data than expected - allowing transfer\n"); | |
447 | #endif /* IDESCSI_DEBUG_LOG */ | |
448 | } | |
449 | } | |
8e7657ae | 450 | if (ireason & IO) { |
e3bfae4c | 451 | pc->flags &= ~PC_FLAG_WRITING; |
1da177e4 | 452 | if (pc->sg) |
790d1239 | 453 | idescsi_input_buffers(drive, pc, bcount); |
1da177e4 | 454 | else |
9567b349 | 455 | hwif->input_data(drive, NULL, pc->cur_pos, bcount); |
1da177e4 | 456 | } else { |
e3bfae4c | 457 | pc->flags |= PC_FLAG_WRITING; |
1da177e4 | 458 | if (pc->sg) |
790d1239 | 459 | idescsi_output_buffers(drive, pc, bcount); |
1da177e4 | 460 | else |
9567b349 | 461 | hwif->output_data(drive, NULL, pc->cur_pos, bcount); |
1da177e4 LT |
462 | } |
463 | /* Update the current position */ | |
1c065787 BP |
464 | pc->xferred += bcount; |
465 | pc->cur_pos += bcount; | |
1da177e4 LT |
466 | |
467 | /* And set the interrupt handler again */ | |
468 | ide_set_handler(drive, &idescsi_pc_intr, get_timeout(pc), idescsi_expiry); | |
469 | return ide_started; | |
470 | } | |
471 | ||
472 | static ide_startstop_t idescsi_transfer_pc(ide_drive_t *drive) | |
473 | { | |
474 | ide_hwif_t *hwif = drive->hwif; | |
475 | idescsi_scsi_t *scsi = drive_to_idescsi(drive); | |
1c065787 | 476 | struct ide_atapi_pc *pc = scsi->pc; |
1da177e4 | 477 | ide_startstop_t startstop; |
8e7657ae | 478 | u8 ireason; |
1da177e4 LT |
479 | |
480 | if (ide_wait_stat(&startstop,drive,DRQ_STAT,BUSY_STAT,WAIT_READY)) { | |
481 | printk(KERN_ERR "ide-scsi: Strange, packet command " | |
482 | "initiated yet DRQ isn't asserted\n"); | |
483 | return startstop; | |
484 | } | |
4c3032d8 | 485 | ireason = hwif->INB(hwif->io_ports.nsect_addr); |
8e7657ae | 486 | if ((ireason & CD) == 0 || (ireason & IO)) { |
1da177e4 LT |
487 | printk(KERN_ERR "ide-scsi: (IO,CoD) != (0,1) while " |
488 | "issuing a packet command\n"); | |
489 | return ide_do_reset (drive); | |
490 | } | |
125e1874 | 491 | BUG_ON(HWGROUP(drive)->handler != NULL); |
1da177e4 LT |
492 | /* Set the interrupt routine */ |
493 | ide_set_handler(drive, &idescsi_pc_intr, get_timeout(pc), idescsi_expiry); | |
9567b349 | 494 | |
1da177e4 | 495 | /* Send the actual packet */ |
9567b349 BZ |
496 | hwif->output_data(drive, NULL, scsi->pc->c, 12); |
497 | ||
e3bfae4c BP |
498 | if (pc->flags & PC_FLAG_DMA_OK) { |
499 | pc->flags |= PC_FLAG_DMA_IN_PROGRESS; | |
5e37bdc0 | 500 | hwif->dma_ops->dma_start(drive); |
1da177e4 LT |
501 | } |
502 | return ide_started; | |
503 | } | |
504 | ||
1c065787 | 505 | static inline int idescsi_set_direction(struct ide_atapi_pc *pc) |
1da177e4 LT |
506 | { |
507 | switch (pc->c[0]) { | |
508 | case READ_6: case READ_10: case READ_12: | |
e3bfae4c | 509 | pc->flags &= ~PC_FLAG_WRITING; |
1da177e4 LT |
510 | return 0; |
511 | case WRITE_6: case WRITE_10: case WRITE_12: | |
e3bfae4c | 512 | pc->flags |= PC_FLAG_WRITING; |
1da177e4 LT |
513 | return 0; |
514 | default: | |
515 | return 1; | |
516 | } | |
517 | } | |
518 | ||
1c065787 | 519 | static int idescsi_map_sg(ide_drive_t *drive, struct ide_atapi_pc *pc) |
1da177e4 LT |
520 | { |
521 | ide_hwif_t *hwif = drive->hwif; | |
522 | struct scatterlist *sg, *scsi_sg; | |
523 | int segments; | |
524 | ||
1c065787 | 525 | if (!pc->req_xfer || pc->req_xfer % 1024) |
1da177e4 LT |
526 | return 1; |
527 | ||
528 | if (idescsi_set_direction(pc)) | |
529 | return 1; | |
530 | ||
531 | sg = hwif->sg_table; | |
427d0bd4 BH |
532 | scsi_sg = scsi_sglist(pc->scsi_cmd); |
533 | segments = scsi_sg_count(pc->scsi_cmd); | |
1da177e4 LT |
534 | |
535 | if (segments > hwif->sg_max_nents) | |
536 | return 1; | |
537 | ||
427d0bd4 BH |
538 | hwif->sg_nents = segments; |
539 | memcpy(sg, scsi_sg, sizeof(*sg) * segments); | |
1da177e4 LT |
540 | |
541 | return 0; | |
542 | } | |
543 | ||
1c065787 BP |
544 | static ide_startstop_t idescsi_issue_pc(ide_drive_t *drive, |
545 | struct ide_atapi_pc *pc) | |
1da177e4 LT |
546 | { |
547 | idescsi_scsi_t *scsi = drive_to_idescsi(drive); | |
548 | ide_hwif_t *hwif = drive->hwif; | |
790d1239 | 549 | u16 bcount; |
e5f9f5a8 | 550 | u8 dma = 0; |
1da177e4 | 551 | |
1c065787 BP |
552 | /* Set the current packet command */ |
553 | scsi->pc = pc; | |
554 | /* We haven't transferred any data yet */ | |
555 | pc->xferred = 0; | |
556 | pc->cur_pos = pc->buf; | |
790d1239 | 557 | /* Request to transfer the entire buffer at once */ |
1c065787 | 558 | bcount = min(pc->req_xfer, 63 * 1024); |
1da177e4 | 559 | |
1da177e4 LT |
560 | if (drive->using_dma && !idescsi_map_sg(drive, pc)) { |
561 | hwif->sg_mapped = 1; | |
5e37bdc0 | 562 | dma = !hwif->dma_ops->dma_setup(drive); |
1da177e4 LT |
563 | hwif->sg_mapped = 0; |
564 | } | |
565 | ||
2fc57388 | 566 | ide_pktcmd_tf_load(drive, IDE_TFLAG_NO_SELECT_MASK, bcount, dma); |
1da177e4 | 567 | |
e5f9f5a8 | 568 | if (dma) |
e3bfae4c | 569 | pc->flags |= PC_FLAG_DMA_OK; |
1da177e4 LT |
570 | |
571 | if (test_bit(IDESCSI_DRQ_INTERRUPT, &scsi->flags)) { | |
2d6027f0 BZ |
572 | ide_execute_command(drive, WIN_PACKETCMD, &idescsi_transfer_pc, |
573 | get_timeout(pc), idescsi_expiry); | |
1da177e4 LT |
574 | return ide_started; |
575 | } else { | |
576 | /* Issue the packet command */ | |
1fc14258 | 577 | ide_execute_pkt_cmd(drive); |
1da177e4 LT |
578 | return idescsi_transfer_pc(drive); |
579 | } | |
580 | } | |
581 | ||
582 | /* | |
583 | * idescsi_do_request is our request handling function. | |
584 | */ | |
585 | static ide_startstop_t idescsi_do_request (ide_drive_t *drive, struct request *rq, sector_t block) | |
586 | { | |
587 | #if IDESCSI_DEBUG_LOG | |
cdd60262 | 588 | printk (KERN_INFO "dev: %s, cmd: %x, errors: %d\n", rq->rq_disk->disk_name,rq->cmd[0],rq->errors); |
1da177e4 LT |
589 | printk (KERN_INFO "sector: %ld, nr_sectors: %ld, current_nr_sectors: %d\n",rq->sector,rq->nr_sectors,rq->current_nr_sectors); |
590 | #endif /* IDESCSI_DEBUG_LOG */ | |
591 | ||
4aff5e23 | 592 | if (blk_sense_request(rq) || blk_special_request(rq)) { |
1c065787 BP |
593 | return idescsi_issue_pc(drive, |
594 | (struct ide_atapi_pc *) rq->special); | |
1da177e4 LT |
595 | } |
596 | blk_dump_rq_flags(rq, "ide-scsi: unsup command"); | |
597 | idescsi_end_request (drive, 0, 0); | |
598 | return ide_stopped; | |
599 | } | |
600 | ||
7662d046 | 601 | #ifdef CONFIG_IDE_PROC_FS |
1da177e4 LT |
602 | static void idescsi_add_settings(ide_drive_t *drive) |
603 | { | |
604 | idescsi_scsi_t *scsi = drive_to_idescsi(drive); | |
605 | ||
606 | /* | |
1497943e | 607 | * drive setting name read/write data type min max mul_factor div_factor data pointer set function |
1da177e4 | 608 | */ |
1497943e BZ |
609 | ide_add_setting(drive, "bios_cyl", SETTING_RW, TYPE_INT, 0, 1023, 1, 1, &drive->bios_cyl, NULL); |
610 | ide_add_setting(drive, "bios_head", SETTING_RW, TYPE_BYTE, 0, 255, 1, 1, &drive->bios_head, NULL); | |
611 | ide_add_setting(drive, "bios_sect", SETTING_RW, TYPE_BYTE, 0, 63, 1, 1, &drive->bios_sect, NULL); | |
612 | ide_add_setting(drive, "transform", SETTING_RW, TYPE_INT, 0, 3, 1, 1, &scsi->transform, NULL); | |
613 | ide_add_setting(drive, "log", SETTING_RW, TYPE_INT, 0, 1, 1, 1, &scsi->log, NULL); | |
1da177e4 | 614 | } |
7662d046 BZ |
615 | #else |
616 | static inline void idescsi_add_settings(ide_drive_t *drive) { ; } | |
617 | #endif | |
1da177e4 LT |
618 | |
619 | /* | |
620 | * Driver initialization. | |
621 | */ | |
622 | static void idescsi_setup (ide_drive_t *drive, idescsi_scsi_t *scsi) | |
623 | { | |
1da177e4 LT |
624 | if (drive->id && (drive->id->config & 0x0060) == 0x20) |
625 | set_bit (IDESCSI_DRQ_INTERRUPT, &scsi->flags); | |
1da177e4 LT |
626 | clear_bit(IDESCSI_SG_TRANSFORM, &scsi->transform); |
627 | #if IDESCSI_DEBUG_LOG | |
628 | set_bit(IDESCSI_LOG_CMD, &scsi->log); | |
629 | #endif /* IDESCSI_DEBUG_LOG */ | |
630 | idescsi_add_settings(drive); | |
1da177e4 LT |
631 | } |
632 | ||
b62735d9 | 633 | static void ide_scsi_remove(ide_drive_t *drive) |
1da177e4 LT |
634 | { |
635 | struct Scsi_Host *scsihost = drive->driver_data; | |
636 | struct ide_scsi_obj *scsi = scsihost_to_idescsi(scsihost); | |
637 | struct gendisk *g = scsi->disk; | |
638 | ||
6fdea8db | 639 | scsi_remove_host(scsihost); |
7662d046 | 640 | ide_proc_unregister_driver(drive, scsi->driver); |
1da177e4 LT |
641 | |
642 | ide_unregister_region(g); | |
643 | ||
644 | drive->driver_data = NULL; | |
645 | g->private_data = NULL; | |
646 | put_disk(g); | |
647 | ||
1da177e4 | 648 | ide_scsi_put(scsi); |
1da177e4 LT |
649 | } |
650 | ||
b62735d9 | 651 | static int ide_scsi_probe(ide_drive_t *); |
1da177e4 | 652 | |
ecfd80e4 | 653 | #ifdef CONFIG_IDE_PROC_FS |
1da177e4 LT |
654 | static ide_proc_entry_t idescsi_proc[] = { |
655 | { "capacity", S_IFREG|S_IRUGO, proc_ide_read_capacity, NULL }, | |
656 | { NULL, 0, NULL, NULL } | |
657 | }; | |
1da177e4 LT |
658 | #endif |
659 | ||
1da177e4 | 660 | static ide_driver_t idescsi_driver = { |
8604affd | 661 | .gen_driver = { |
4ef3b8f4 | 662 | .owner = THIS_MODULE, |
8604affd BZ |
663 | .name = "ide-scsi", |
664 | .bus = &ide_bus_type, | |
8604affd | 665 | }, |
b62735d9 MP |
666 | .probe = ide_scsi_probe, |
667 | .remove = ide_scsi_remove, | |
1da177e4 LT |
668 | .version = IDESCSI_VERSION, |
669 | .media = ide_scsi, | |
1da177e4 | 670 | .supports_dsc_overlap = 0, |
1da177e4 LT |
671 | .do_request = idescsi_do_request, |
672 | .end_request = idescsi_end_request, | |
673 | .error = idescsi_atapi_error, | |
674 | .abort = idescsi_atapi_abort, | |
7662d046 BZ |
675 | #ifdef CONFIG_IDE_PROC_FS |
676 | .proc = idescsi_proc, | |
677 | #endif | |
1da177e4 LT |
678 | }; |
679 | ||
680 | static int idescsi_ide_open(struct inode *inode, struct file *filp) | |
681 | { | |
682 | struct gendisk *disk = inode->i_bdev->bd_disk; | |
683 | struct ide_scsi_obj *scsi; | |
1da177e4 LT |
684 | |
685 | if (!(scsi = ide_scsi_get(disk))) | |
686 | return -ENXIO; | |
687 | ||
1da177e4 LT |
688 | return 0; |
689 | } | |
690 | ||
691 | static int idescsi_ide_release(struct inode *inode, struct file *filp) | |
692 | { | |
693 | struct gendisk *disk = inode->i_bdev->bd_disk; | |
694 | struct ide_scsi_obj *scsi = ide_scsi_g(disk); | |
1da177e4 LT |
695 | |
696 | ide_scsi_put(scsi); | |
697 | ||
698 | return 0; | |
699 | } | |
700 | ||
701 | static int idescsi_ide_ioctl(struct inode *inode, struct file *file, | |
702 | unsigned int cmd, unsigned long arg) | |
703 | { | |
704 | struct block_device *bdev = inode->i_bdev; | |
705 | struct ide_scsi_obj *scsi = ide_scsi_g(bdev->bd_disk); | |
706 | return generic_ide_ioctl(scsi->drive, file, bdev, cmd, arg); | |
707 | } | |
708 | ||
709 | static struct block_device_operations idescsi_ops = { | |
710 | .owner = THIS_MODULE, | |
711 | .open = idescsi_ide_open, | |
712 | .release = idescsi_ide_release, | |
713 | .ioctl = idescsi_ide_ioctl, | |
714 | }; | |
715 | ||
1da177e4 LT |
716 | static int idescsi_slave_configure(struct scsi_device * sdp) |
717 | { | |
718 | /* Configure detected device */ | |
427d0bd4 BH |
719 | sdp->use_10_for_rw = 1; |
720 | sdp->use_10_for_ms = 1; | |
1da177e4 LT |
721 | scsi_adjust_queue_depth(sdp, MSG_SIMPLE_TAG, sdp->host->cmd_per_lun); |
722 | return 0; | |
723 | } | |
724 | ||
725 | static const char *idescsi_info (struct Scsi_Host *host) | |
726 | { | |
727 | return "SCSI host adapter emulation for IDE ATAPI devices"; | |
728 | } | |
729 | ||
730 | static int idescsi_ioctl (struct scsi_device *dev, int cmd, void __user *arg) | |
731 | { | |
732 | idescsi_scsi_t *scsi = scsihost_to_idescsi(dev->host); | |
733 | ||
734 | if (cmd == SG_SET_TRANSFORM) { | |
735 | if (arg) | |
736 | set_bit(IDESCSI_SG_TRANSFORM, &scsi->transform); | |
737 | else | |
738 | clear_bit(IDESCSI_SG_TRANSFORM, &scsi->transform); | |
739 | return 0; | |
740 | } else if (cmd == SG_GET_TRANSFORM) | |
741 | return put_user(test_bit(IDESCSI_SG_TRANSFORM, &scsi->transform), (int __user *) arg); | |
742 | return -EINVAL; | |
743 | } | |
744 | ||
1da177e4 LT |
745 | static int idescsi_queue (struct scsi_cmnd *cmd, |
746 | void (*done)(struct scsi_cmnd *)) | |
747 | { | |
748 | struct Scsi_Host *host = cmd->device->host; | |
749 | idescsi_scsi_t *scsi = scsihost_to_idescsi(host); | |
750 | ide_drive_t *drive = scsi->drive; | |
751 | struct request *rq = NULL; | |
1c065787 | 752 | struct ide_atapi_pc *pc = NULL; |
1da177e4 LT |
753 | |
754 | if (!drive) { | |
017560fc | 755 | scmd_printk (KERN_ERR, cmd, "drive not present\n"); |
1da177e4 LT |
756 | goto abort; |
757 | } | |
758 | scsi = drive_to_idescsi(drive); | |
1c065787 BP |
759 | pc = kmalloc(sizeof(struct ide_atapi_pc), GFP_ATOMIC); |
760 | rq = kmalloc(sizeof(struct request), GFP_ATOMIC); | |
1da177e4 LT |
761 | if (rq == NULL || pc == NULL) { |
762 | printk (KERN_ERR "ide-scsi: %s: out of memory\n", drive->name); | |
763 | goto abort; | |
764 | } | |
765 | ||
766 | memset (pc->c, 0, 12); | |
767 | pc->flags = 0; | |
768 | pc->rq = rq; | |
769 | memcpy (pc->c, cmd->cmnd, cmd->cmd_len); | |
1c065787 | 770 | pc->buf = NULL; |
427d0bd4 | 771 | pc->sg = scsi_sglist(cmd); |
c79d88b7 | 772 | pc->sg_cnt = scsi_sg_count(cmd); |
1da177e4 | 773 | pc->b_count = 0; |
1c065787 | 774 | pc->req_xfer = pc->buf_size = scsi_bufflen(cmd); |
1da177e4 LT |
775 | pc->scsi_cmd = cmd; |
776 | pc->done = done; | |
777 | pc->timeout = jiffies + cmd->timeout_per_command; | |
778 | ||
1da177e4 LT |
779 | if (test_bit(IDESCSI_LOG_CMD, &scsi->log)) { |
780 | printk ("ide-scsi: %s: que %lu, cmd = ", drive->name, cmd->serial_number); | |
69ae6fee | 781 | ide_scsi_hex_dump(cmd->cmnd, cmd->cmd_len); |
1da177e4 LT |
782 | if (memcmp(pc->c, cmd->cmnd, cmd->cmd_len)) { |
783 | printk ("ide-scsi: %s: que %lu, tsl = ", drive->name, cmd->serial_number); | |
69ae6fee | 784 | ide_scsi_hex_dump(pc->c, 12); |
1da177e4 LT |
785 | } |
786 | } | |
787 | ||
788 | ide_init_drive_cmd (rq); | |
789 | rq->special = (char *) pc; | |
4aff5e23 | 790 | rq->cmd_type = REQ_TYPE_SPECIAL; |
1da177e4 LT |
791 | spin_unlock_irq(host->host_lock); |
792 | rq->rq_disk = scsi->disk; | |
793 | (void) ide_do_drive_cmd (drive, rq, ide_end); | |
794 | spin_lock_irq(host->host_lock); | |
795 | return 0; | |
796 | abort: | |
c9475cb0 JJ |
797 | kfree (pc); |
798 | kfree (rq); | |
1da177e4 LT |
799 | cmd->result = DID_ERROR << 16; |
800 | done(cmd); | |
801 | return 0; | |
802 | } | |
803 | ||
804 | static int idescsi_eh_abort (struct scsi_cmnd *cmd) | |
805 | { | |
806 | idescsi_scsi_t *scsi = scsihost_to_idescsi(cmd->device->host); | |
807 | ide_drive_t *drive = scsi->drive; | |
808 | int busy; | |
809 | int ret = FAILED; | |
810 | ||
811 | /* In idescsi_eh_abort we try to gently pry our command from the ide subsystem */ | |
812 | ||
813 | if (test_bit(IDESCSI_LOG_CMD, &scsi->log)) | |
814 | printk (KERN_WARNING "ide-scsi: abort called for %lu\n", cmd->serial_number); | |
815 | ||
816 | if (!drive) { | |
817 | printk (KERN_WARNING "ide-scsi: Drive not set in idescsi_eh_abort\n"); | |
818 | WARN_ON(1); | |
819 | goto no_drive; | |
820 | } | |
821 | ||
822 | /* First give it some more time, how much is "right" is hard to say :-( */ | |
823 | ||
824 | busy = ide_wait_not_busy(HWIF(drive), 100); /* FIXME - uses mdelay which causes latency? */ | |
825 | if (test_bit(IDESCSI_LOG_CMD, &scsi->log)) | |
826 | printk (KERN_WARNING "ide-scsi: drive did%s become ready\n", busy?" not":""); | |
827 | ||
828 | spin_lock_irq(&ide_lock); | |
829 | ||
830 | /* If there is no pc running we're done (our interrupt took care of it) */ | |
831 | if (!scsi->pc) { | |
832 | ret = SUCCESS; | |
833 | goto ide_unlock; | |
834 | } | |
835 | ||
836 | /* It's somewhere in flight. Does ide subsystem agree? */ | |
837 | if (scsi->pc->scsi_cmd->serial_number == cmd->serial_number && !busy && | |
838 | elv_queue_empty(drive->queue) && HWGROUP(drive)->rq != scsi->pc->rq) { | |
839 | /* | |
840 | * FIXME - not sure this condition can ever occur | |
841 | */ | |
842 | printk (KERN_ERR "ide-scsi: cmd aborted!\n"); | |
843 | ||
4aff5e23 | 844 | if (blk_sense_request(scsi->pc->rq)) |
1c065787 | 845 | kfree(scsi->pc->buf); |
1da177e4 LT |
846 | kfree(scsi->pc->rq); |
847 | kfree(scsi->pc); | |
848 | scsi->pc = NULL; | |
849 | ||
850 | ret = SUCCESS; | |
851 | } | |
852 | ||
853 | ide_unlock: | |
854 | spin_unlock_irq(&ide_lock); | |
855 | no_drive: | |
856 | if (test_bit(IDESCSI_LOG_CMD, &scsi->log)) | |
857 | printk (KERN_WARNING "ide-scsi: abort returns %s\n", ret == SUCCESS?"success":"failed"); | |
858 | ||
859 | return ret; | |
860 | } | |
861 | ||
862 | static int idescsi_eh_reset (struct scsi_cmnd *cmd) | |
863 | { | |
864 | struct request *req; | |
865 | idescsi_scsi_t *scsi = scsihost_to_idescsi(cmd->device->host); | |
866 | ide_drive_t *drive = scsi->drive; | |
867 | int ready = 0; | |
868 | int ret = SUCCESS; | |
869 | ||
870 | /* In idescsi_eh_reset we forcefully remove the command from the ide subsystem and reset the device. */ | |
871 | ||
872 | if (test_bit(IDESCSI_LOG_CMD, &scsi->log)) | |
873 | printk (KERN_WARNING "ide-scsi: reset called for %lu\n", cmd->serial_number); | |
874 | ||
875 | if (!drive) { | |
876 | printk (KERN_WARNING "ide-scsi: Drive not set in idescsi_eh_reset\n"); | |
877 | WARN_ON(1); | |
878 | return FAILED; | |
879 | } | |
880 | ||
df0ae249 JG |
881 | spin_lock_irq(cmd->device->host->host_lock); |
882 | spin_lock(&ide_lock); | |
1da177e4 LT |
883 | |
884 | if (!scsi->pc || (req = scsi->pc->rq) != HWGROUP(drive)->rq || !HWGROUP(drive)->handler) { | |
885 | printk (KERN_WARNING "ide-scsi: No active request in idescsi_eh_reset\n"); | |
886 | spin_unlock(&ide_lock); | |
df0ae249 | 887 | spin_unlock_irq(cmd->device->host->host_lock); |
1da177e4 LT |
888 | return FAILED; |
889 | } | |
890 | ||
891 | /* kill current request */ | |
5a330e39 KU |
892 | if (__blk_end_request(req, -EIO, 0)) |
893 | BUG(); | |
4aff5e23 | 894 | if (blk_sense_request(req)) |
1c065787 | 895 | kfree(scsi->pc->buf); |
1da177e4 LT |
896 | kfree(scsi->pc); |
897 | scsi->pc = NULL; | |
898 | kfree(req); | |
899 | ||
900 | /* now nuke the drive queue */ | |
901 | while ((req = elv_next_request(drive->queue))) { | |
5a330e39 KU |
902 | if (__blk_end_request(req, -EIO, 0)) |
903 | BUG(); | |
1da177e4 LT |
904 | } |
905 | ||
906 | HWGROUP(drive)->rq = NULL; | |
907 | HWGROUP(drive)->handler = NULL; | |
908 | HWGROUP(drive)->busy = 1; /* will set this to zero when ide reset finished */ | |
df0ae249 | 909 | spin_unlock(&ide_lock); |
1da177e4 LT |
910 | |
911 | ide_do_reset(drive); | |
912 | ||
913 | /* ide_do_reset starts a polling handler which restarts itself every 50ms until the reset finishes */ | |
914 | ||
915 | do { | |
1da177e4 | 916 | spin_unlock_irq(cmd->device->host->host_lock); |
df0ae249 | 917 | msleep(50); |
1da177e4 LT |
918 | spin_lock_irq(cmd->device->host->host_lock); |
919 | } while ( HWGROUP(drive)->handler ); | |
920 | ||
921 | ready = drive_is_ready(drive); | |
922 | HWGROUP(drive)->busy--; | |
923 | if (!ready) { | |
924 | printk (KERN_ERR "ide-scsi: reset failed!\n"); | |
925 | ret = FAILED; | |
926 | } | |
927 | ||
df0ae249 | 928 | spin_unlock_irq(cmd->device->host->host_lock); |
1da177e4 LT |
929 | return ret; |
930 | } | |
931 | ||
932 | static int idescsi_bios(struct scsi_device *sdev, struct block_device *bdev, | |
933 | sector_t capacity, int *parm) | |
934 | { | |
935 | idescsi_scsi_t *idescsi = scsihost_to_idescsi(sdev->host); | |
936 | ide_drive_t *drive = idescsi->drive; | |
937 | ||
938 | if (drive->bios_cyl && drive->bios_head && drive->bios_sect) { | |
939 | parm[0] = drive->bios_head; | |
940 | parm[1] = drive->bios_sect; | |
941 | parm[2] = drive->bios_cyl; | |
942 | } | |
943 | return 0; | |
944 | } | |
945 | ||
946 | static struct scsi_host_template idescsi_template = { | |
947 | .module = THIS_MODULE, | |
948 | .name = "idescsi", | |
949 | .info = idescsi_info, | |
950 | .slave_configure = idescsi_slave_configure, | |
951 | .ioctl = idescsi_ioctl, | |
952 | .queuecommand = idescsi_queue, | |
953 | .eh_abort_handler = idescsi_eh_abort, | |
954 | .eh_host_reset_handler = idescsi_eh_reset, | |
955 | .bios_param = idescsi_bios, | |
956 | .can_queue = 40, | |
957 | .this_id = -1, | |
958 | .sg_tablesize = 256, | |
959 | .cmd_per_lun = 5, | |
960 | .max_sectors = 128, | |
961 | .use_clustering = DISABLE_CLUSTERING, | |
962 | .emulated = 1, | |
963 | .proc_name = "ide-scsi", | |
964 | }; | |
965 | ||
b62735d9 | 966 | static int ide_scsi_probe(ide_drive_t *drive) |
1da177e4 LT |
967 | { |
968 | idescsi_scsi_t *idescsi; | |
969 | struct Scsi_Host *host; | |
970 | struct gendisk *g; | |
971 | static int warned; | |
972 | int err = -ENOMEM; | |
973 | ||
974 | if (!warned && drive->media == ide_cdrom) { | |
975 | printk(KERN_WARNING "ide-scsi is deprecated for cd burning! Use ide-cd and give dev=/dev/hdX as device\n"); | |
976 | warned = 1; | |
977 | } | |
978 | ||
aaeab80b AC |
979 | if (idescsi_nocd && drive->media == ide_cdrom) |
980 | return -ENODEV; | |
981 | ||
1da177e4 LT |
982 | if (!strstr("ide-scsi", drive->driver_req) || |
983 | !drive->present || | |
984 | drive->media == ide_disk || | |
985 | !(host = scsi_host_alloc(&idescsi_template,sizeof(idescsi_scsi_t)))) | |
8604affd | 986 | return -ENODEV; |
1da177e4 LT |
987 | |
988 | g = alloc_disk(1 << PARTN_BITS); | |
989 | if (!g) | |
990 | goto out_host_put; | |
991 | ||
992 | ide_init_disk(g, drive); | |
993 | ||
994 | host->max_id = 1; | |
995 | ||
996 | #if IDESCSI_DEBUG_LOG | |
997 | if (drive->id->last_lun) | |
998 | printk(KERN_NOTICE "%s: id->last_lun=%u\n", drive->name, drive->id->last_lun); | |
999 | #endif | |
1000 | if ((drive->id->last_lun & 0x7) != 7) | |
1001 | host->max_lun = (drive->id->last_lun & 0x7) + 1; | |
1002 | else | |
1003 | host->max_lun = 1; | |
1004 | ||
1005 | drive->driver_data = host; | |
1006 | idescsi = scsihost_to_idescsi(host); | |
1007 | idescsi->drive = drive; | |
1008 | idescsi->driver = &idescsi_driver; | |
1009 | idescsi->host = host; | |
1010 | idescsi->disk = g; | |
1011 | g->private_data = &idescsi->driver; | |
7662d046 | 1012 | ide_proc_register_driver(drive, &idescsi_driver); |
8604affd BZ |
1013 | err = 0; |
1014 | idescsi_setup(drive, idescsi); | |
1015 | g->fops = &idescsi_ops; | |
1016 | ide_register_region(g); | |
1017 | err = scsi_add_host(host, &drive->gendev); | |
1da177e4 | 1018 | if (!err) { |
8604affd BZ |
1019 | scsi_scan_host(host); |
1020 | return 0; | |
1da177e4 | 1021 | } |
8604affd BZ |
1022 | /* fall through on error */ |
1023 | ide_unregister_region(g); | |
7662d046 | 1024 | ide_proc_unregister_driver(drive, &idescsi_driver); |
1da177e4 LT |
1025 | |
1026 | put_disk(g); | |
1027 | out_host_put: | |
1028 | scsi_host_put(host); | |
1029 | return err; | |
1030 | } | |
1031 | ||
1032 | static int __init init_idescsi_module(void) | |
1033 | { | |
8604affd | 1034 | return driver_register(&idescsi_driver.gen_driver); |
1da177e4 LT |
1035 | } |
1036 | ||
1037 | static void __exit exit_idescsi_module(void) | |
1038 | { | |
8604affd | 1039 | driver_unregister(&idescsi_driver.gen_driver); |
1da177e4 LT |
1040 | } |
1041 | ||
aaeab80b AC |
1042 | module_param(idescsi_nocd, int, 0600); |
1043 | MODULE_PARM_DESC(idescsi_nocd, "Disable handling of CD-ROMs so they may be driven by ide-cd"); | |
1da177e4 LT |
1044 | module_init(init_idescsi_module); |
1045 | module_exit(exit_idescsi_module); | |
1046 | MODULE_LICENSE("GPL"); |