]>
Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * linux/drivers/scsi/ide-scsi.c Version 0.9 Jul 4, 1999 | |
3 | * | |
4 | * Copyright (C) 1996 - 1999 Gadi Oxman <gadio@netvision.net.il> | |
5 | */ | |
6 | ||
7 | /* | |
8 | * Emulation of a SCSI host adapter for IDE ATAPI devices. | |
9 | * | |
10 | * With this driver, one can use the Linux SCSI drivers instead of the | |
11 | * native IDE ATAPI drivers. | |
12 | * | |
13 | * Ver 0.1 Dec 3 96 Initial version. | |
14 | * Ver 0.2 Jan 26 97 Fixed bug in cleanup_module() and added emulation | |
15 | * of MODE_SENSE_6/MODE_SELECT_6 for cdroms. Thanks | |
16 | * to Janos Farkas for pointing this out. | |
17 | * Avoid using bitfields in structures for m68k. | |
18 | * Added Scatter/Gather and DMA support. | |
19 | * Ver 0.4 Dec 7 97 Add support for ATAPI PD/CD drives. | |
20 | * Use variable timeout for each command. | |
21 | * Ver 0.5 Jan 2 98 Fix previous PD/CD support. | |
22 | * Allow disabling of SCSI-6 to SCSI-10 transformation. | |
23 | * Ver 0.6 Jan 27 98 Allow disabling of SCSI command translation layer | |
24 | * for access through /dev/sg. | |
25 | * Fix MODE_SENSE_6/MODE_SELECT_6/INQUIRY translation. | |
26 | * Ver 0.7 Dec 04 98 Ignore commands where lun != 0 to avoid multiple | |
27 | * detection of devices with CONFIG_SCSI_MULTI_LUN | |
28 | * Ver 0.8 Feb 05 99 Optical media need translation too. Reverse 0.7. | |
29 | * Ver 0.9 Jul 04 99 Fix a bug in SG_SET_TRANSFORM. | |
30 | * Ver 0.91 Jun 10 02 Fix "off by one" error in transforms | |
31 | * Ver 0.92 Dec 31 02 Implement new SCSI mid level API | |
32 | */ | |
33 | ||
34 | #define IDESCSI_VERSION "0.92" | |
35 | ||
36 | #include <linux/module.h> | |
1da177e4 LT |
37 | #include <linux/types.h> |
38 | #include <linux/string.h> | |
39 | #include <linux/kernel.h> | |
40 | #include <linux/mm.h> | |
41 | #include <linux/ioport.h> | |
42 | #include <linux/blkdev.h> | |
43 | #include <linux/errno.h> | |
44 | #include <linux/hdreg.h> | |
45 | #include <linux/slab.h> | |
46 | #include <linux/ide.h> | |
47 | #include <linux/scatterlist.h> | |
df0ae249 | 48 | #include <linux/delay.h> |
e723ccd8 | 49 | #include <linux/mutex.h> |
1da177e4 LT |
50 | |
51 | #include <asm/io.h> | |
52 | #include <asm/bitops.h> | |
53 | #include <asm/uaccess.h> | |
54 | ||
55 | #include <scsi/scsi.h> | |
56 | #include <scsi/scsi_cmnd.h> | |
57 | #include <scsi/scsi_device.h> | |
58 | #include <scsi/scsi_host.h> | |
59 | #include <scsi/scsi_tcq.h> | |
60 | #include <scsi/sg.h> | |
61 | ||
62 | #define IDESCSI_DEBUG_LOG 0 | |
63 | ||
64 | typedef struct idescsi_pc_s { | |
65 | u8 c[12]; /* Actual packet bytes */ | |
66 | int request_transfer; /* Bytes to transfer */ | |
67 | int actually_transferred; /* Bytes actually transferred */ | |
68 | int buffer_size; /* Size of our data buffer */ | |
69 | struct request *rq; /* The corresponding request */ | |
70 | u8 *buffer; /* Data buffer */ | |
71 | u8 *current_position; /* Pointer into the above buffer */ | |
72 | struct scatterlist *sg; /* Scatter gather table */ | |
c79d88b7 | 73 | unsigned int sg_cnt; /* Number of entries in sg */ |
1da177e4 LT |
74 | int b_count; /* Bytes transferred from current entry */ |
75 | struct scsi_cmnd *scsi_cmd; /* SCSI command */ | |
76 | void (*done)(struct scsi_cmnd *); /* Scsi completion routine */ | |
77 | unsigned long flags; /* Status/Action flags */ | |
78 | unsigned long timeout; /* Command timeout */ | |
79 | } idescsi_pc_t; | |
80 | ||
81 | /* | |
82 | * Packet command status bits. | |
83 | */ | |
84 | #define PC_DMA_IN_PROGRESS 0 /* 1 while DMA in progress */ | |
85 | #define PC_WRITING 1 /* Data direction */ | |
1da177e4 LT |
86 | #define PC_TIMEDOUT 3 /* command timed out */ |
87 | #define PC_DMA_OK 4 /* Use DMA */ | |
88 | ||
89 | /* | |
90 | * SCSI command transformation layer | |
91 | */ | |
1da177e4 LT |
92 | #define IDESCSI_SG_TRANSFORM 1 /* /dev/sg transformation */ |
93 | ||
94 | /* | |
95 | * Log flags | |
96 | */ | |
97 | #define IDESCSI_LOG_CMD 0 /* Log SCSI commands */ | |
98 | ||
99 | typedef struct ide_scsi_obj { | |
100 | ide_drive_t *drive; | |
101 | ide_driver_t *driver; | |
102 | struct gendisk *disk; | |
103 | struct Scsi_Host *host; | |
104 | ||
105 | idescsi_pc_t *pc; /* Current packet command */ | |
106 | unsigned long flags; /* Status/Action flags */ | |
107 | unsigned long transform; /* SCSI cmd translation layer */ | |
108 | unsigned long log; /* log flags */ | |
109 | } idescsi_scsi_t; | |
110 | ||
e723ccd8 | 111 | static DEFINE_MUTEX(idescsi_ref_mutex); |
aaeab80b | 112 | static int idescsi_nocd; /* Set by module param to skip cd */ |
1da177e4 LT |
113 | |
114 | #define ide_scsi_g(disk) \ | |
115 | container_of((disk)->private_data, struct ide_scsi_obj, driver) | |
116 | ||
117 | static struct ide_scsi_obj *ide_scsi_get(struct gendisk *disk) | |
118 | { | |
119 | struct ide_scsi_obj *scsi = NULL; | |
120 | ||
e723ccd8 | 121 | mutex_lock(&idescsi_ref_mutex); |
1da177e4 LT |
122 | scsi = ide_scsi_g(disk); |
123 | if (scsi) | |
124 | scsi_host_get(scsi->host); | |
e723ccd8 | 125 | mutex_unlock(&idescsi_ref_mutex); |
1da177e4 LT |
126 | return scsi; |
127 | } | |
128 | ||
129 | static void ide_scsi_put(struct ide_scsi_obj *scsi) | |
130 | { | |
e723ccd8 | 131 | mutex_lock(&idescsi_ref_mutex); |
1da177e4 | 132 | scsi_host_put(scsi->host); |
e723ccd8 | 133 | mutex_unlock(&idescsi_ref_mutex); |
1da177e4 LT |
134 | } |
135 | ||
136 | static inline idescsi_scsi_t *scsihost_to_idescsi(struct Scsi_Host *host) | |
137 | { | |
138 | return (idescsi_scsi_t*) (&host[1]); | |
139 | } | |
140 | ||
141 | static inline idescsi_scsi_t *drive_to_idescsi(ide_drive_t *ide_drive) | |
142 | { | |
143 | return scsihost_to_idescsi(ide_drive->driver_data); | |
144 | } | |
145 | ||
146 | /* | |
147 | * Per ATAPI device status bits. | |
148 | */ | |
149 | #define IDESCSI_DRQ_INTERRUPT 0 /* DRQ interrupt device */ | |
150 | ||
151 | /* | |
152 | * ide-scsi requests. | |
153 | */ | |
154 | #define IDESCSI_PC_RQ 90 | |
155 | ||
156 | static void idescsi_discard_data (ide_drive_t *drive, unsigned int bcount) | |
157 | { | |
158 | while (bcount--) | |
159 | (void) HWIF(drive)->INB(IDE_DATA_REG); | |
160 | } | |
161 | ||
162 | static void idescsi_output_zeros (ide_drive_t *drive, unsigned int bcount) | |
163 | { | |
164 | while (bcount--) | |
165 | HWIF(drive)->OUTB(0, IDE_DATA_REG); | |
166 | } | |
167 | ||
168 | /* | |
169 | * PIO data transfer routines using the scatter gather table. | |
170 | */ | |
171 | static void idescsi_input_buffers (ide_drive_t *drive, idescsi_pc_t *pc, unsigned int bcount) | |
172 | { | |
173 | int count; | |
174 | char *buf; | |
175 | ||
176 | while (bcount) { | |
1da177e4 | 177 | count = min(pc->sg->length - pc->b_count, bcount); |
a717f773 AM |
178 | if (PageHighMem(pc->sg->page)) { |
179 | unsigned long flags; | |
180 | ||
181 | local_irq_save(flags); | |
182 | buf = kmap_atomic(pc->sg->page, KM_IRQ0) + | |
183 | pc->sg->offset; | |
184 | drive->hwif->atapi_input_bytes(drive, | |
185 | buf + pc->b_count, count); | |
186 | kunmap_atomic(buf - pc->sg->offset, KM_IRQ0); | |
187 | local_irq_restore(flags); | |
188 | } else { | |
189 | buf = page_address(pc->sg->page) + pc->sg->offset; | |
190 | drive->hwif->atapi_input_bytes(drive, | |
191 | buf + pc->b_count, count); | |
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, discarding data\n"); | |
204 | idescsi_discard_data (drive, bcount); | |
205 | } | |
1da177e4 LT |
206 | } |
207 | ||
208 | static void idescsi_output_buffers (ide_drive_t *drive, idescsi_pc_t *pc, unsigned int bcount) | |
209 | { | |
210 | int count; | |
211 | char *buf; | |
212 | ||
213 | while (bcount) { | |
1da177e4 | 214 | count = min(pc->sg->length - pc->b_count, bcount); |
a717f773 AM |
215 | if (PageHighMem(pc->sg->page)) { |
216 | unsigned long flags; | |
217 | ||
218 | local_irq_save(flags); | |
219 | buf = kmap_atomic(pc->sg->page, KM_IRQ0) + | |
220 | pc->sg->offset; | |
221 | drive->hwif->atapi_output_bytes(drive, | |
222 | buf + pc->b_count, count); | |
223 | kunmap_atomic(buf - pc->sg->offset, KM_IRQ0); | |
224 | local_irq_restore(flags); | |
225 | } else { | |
226 | buf = page_address(pc->sg->page) + pc->sg->offset; | |
227 | drive->hwif->atapi_output_bytes(drive, | |
228 | buf + pc->b_count, count); | |
229 | } | |
230 | bcount -= count; pc->b_count += count; | |
1da177e4 | 231 | if (pc->b_count == pc->sg->length) { |
c79d88b7 | 232 | if (!--pc->sg_cnt) |
d274a987 JA |
233 | break; |
234 | pc->sg = sg_next(pc->sg); | |
1da177e4 LT |
235 | pc->b_count = 0; |
236 | } | |
237 | } | |
d274a987 JA |
238 | |
239 | if (bcount) { | |
240 | printk (KERN_ERR "ide-scsi: scatter gather table too small, padding with zeros\n"); | |
241 | idescsi_output_zeros (drive, bcount); | |
242 | } | |
1da177e4 LT |
243 | } |
244 | ||
1da177e4 LT |
245 | static void hexdump(u8 *x, int len) |
246 | { | |
247 | int i; | |
248 | ||
249 | printk("[ "); | |
250 | for (i = 0; i < len; i++) | |
251 | printk("%x ", x[i]); | |
252 | printk("]\n"); | |
253 | } | |
254 | ||
255 | static int idescsi_check_condition(ide_drive_t *drive, struct request *failed_command) | |
256 | { | |
257 | idescsi_scsi_t *scsi = drive_to_idescsi(drive); | |
258 | idescsi_pc_t *pc; | |
259 | struct request *rq; | |
260 | u8 *buf; | |
261 | ||
262 | /* stuff a sense request in front of our current request */ | |
41ead3c9 MK |
263 | pc = kzalloc(sizeof(idescsi_pc_t), GFP_ATOMIC); |
264 | rq = kmalloc(sizeof(struct request), GFP_ATOMIC); | |
265 | buf = kzalloc(SCSI_SENSE_BUFFERSIZE, GFP_ATOMIC); | |
266 | if (!pc || !rq || !buf) { | |
c9475cb0 JJ |
267 | kfree(buf); |
268 | kfree(rq); | |
269 | kfree(pc); | |
1da177e4 LT |
270 | return -ENOMEM; |
271 | } | |
1da177e4 LT |
272 | ide_init_drive_cmd(rq); |
273 | rq->special = (char *) pc; | |
274 | pc->rq = rq; | |
275 | pc->buffer = buf; | |
276 | pc->c[0] = REQUEST_SENSE; | |
277 | pc->c[4] = pc->request_transfer = pc->buffer_size = SCSI_SENSE_BUFFERSIZE; | |
4aff5e23 | 278 | rq->cmd_type = REQ_TYPE_SENSE; |
1da177e4 LT |
279 | pc->timeout = jiffies + WAIT_READY; |
280 | /* NOTE! Save the failed packet command in "rq->buffer" */ | |
281 | rq->buffer = (void *) failed_command->special; | |
282 | pc->scsi_cmd = ((idescsi_pc_t *) failed_command->special)->scsi_cmd; | |
283 | if (test_bit(IDESCSI_LOG_CMD, &scsi->log)) { | |
284 | printk ("ide-scsi: %s: queue cmd = ", drive->name); | |
285 | hexdump(pc->c, 6); | |
286 | } | |
287 | rq->rq_disk = scsi->disk; | |
288 | return ide_do_drive_cmd(drive, rq, ide_preempt); | |
289 | } | |
290 | ||
291 | static int idescsi_end_request(ide_drive_t *, int, int); | |
292 | ||
293 | static ide_startstop_t | |
294 | idescsi_atapi_error(ide_drive_t *drive, struct request *rq, u8 stat, u8 err) | |
295 | { | |
296 | if (HWIF(drive)->INB(IDE_STATUS_REG) & (BUSY_STAT|DRQ_STAT)) | |
297 | /* force an abort */ | |
298 | HWIF(drive)->OUTB(WIN_IDLEIMMEDIATE,IDE_COMMAND_REG); | |
299 | ||
300 | rq->errors++; | |
301 | ||
302 | idescsi_end_request(drive, 0, 0); | |
303 | ||
304 | return ide_stopped; | |
305 | } | |
306 | ||
307 | static ide_startstop_t | |
308 | idescsi_atapi_abort(ide_drive_t *drive, struct request *rq) | |
309 | { | |
310 | #if IDESCSI_DEBUG_LOG | |
311 | printk(KERN_WARNING "idescsi_atapi_abort called for %lu\n", | |
312 | ((idescsi_pc_t *) rq->special)->scsi_cmd->serial_number); | |
313 | #endif | |
314 | rq->errors |= ERROR_MAX; | |
315 | ||
316 | idescsi_end_request(drive, 0, 0); | |
317 | ||
318 | return ide_stopped; | |
319 | } | |
320 | ||
321 | static int idescsi_end_request (ide_drive_t *drive, int uptodate, int nrsecs) | |
322 | { | |
323 | idescsi_scsi_t *scsi = drive_to_idescsi(drive); | |
324 | struct request *rq = HWGROUP(drive)->rq; | |
325 | idescsi_pc_t *pc = (idescsi_pc_t *) rq->special; | |
326 | int log = test_bit(IDESCSI_LOG_CMD, &scsi->log); | |
327 | struct Scsi_Host *host; | |
32565347 | 328 | int errors = rq->errors; |
1da177e4 LT |
329 | unsigned long flags; |
330 | ||
4aff5e23 | 331 | if (!blk_special_request(rq) && !blk_sense_request(rq)) { |
1da177e4 LT |
332 | ide_end_request(drive, uptodate, nrsecs); |
333 | return 0; | |
334 | } | |
335 | ide_end_drive_cmd (drive, 0, 0); | |
4aff5e23 | 336 | if (blk_sense_request(rq)) { |
1da177e4 LT |
337 | idescsi_pc_t *opc = (idescsi_pc_t *) rq->buffer; |
338 | if (log) { | |
339 | printk ("ide-scsi: %s: wrap up check %lu, rst = ", drive->name, opc->scsi_cmd->serial_number); | |
340 | hexdump(pc->buffer,16); | |
341 | } | |
342 | memcpy((void *) opc->scsi_cmd->sense_buffer, pc->buffer, SCSI_SENSE_BUFFERSIZE); | |
343 | kfree(pc->buffer); | |
344 | kfree(pc); | |
345 | kfree(rq); | |
346 | pc = opc; | |
347 | rq = pc->rq; | |
348 | pc->scsi_cmd->result = (CHECK_CONDITION << 1) | | |
349 | ((test_bit(PC_TIMEDOUT, &pc->flags)?DID_TIME_OUT:DID_OK) << 16); | |
350 | } else if (test_bit(PC_TIMEDOUT, &pc->flags)) { | |
351 | if (log) | |
352 | printk (KERN_WARNING "ide-scsi: %s: timed out for %lu\n", | |
353 | drive->name, pc->scsi_cmd->serial_number); | |
354 | pc->scsi_cmd->result = DID_TIME_OUT << 16; | |
32565347 | 355 | } else if (errors >= ERROR_MAX) { |
1da177e4 LT |
356 | pc->scsi_cmd->result = DID_ERROR << 16; |
357 | if (log) | |
358 | printk ("ide-scsi: %s: I/O error for %lu\n", drive->name, pc->scsi_cmd->serial_number); | |
32565347 | 359 | } else if (errors) { |
1da177e4 LT |
360 | if (log) |
361 | printk ("ide-scsi: %s: check condition for %lu\n", drive->name, pc->scsi_cmd->serial_number); | |
362 | if (!idescsi_check_condition(drive, rq)) | |
363 | /* we started a request sense, so we'll be back, exit for now */ | |
364 | return 0; | |
365 | pc->scsi_cmd->result = (CHECK_CONDITION << 1) | (DID_OK << 16); | |
366 | } else { | |
367 | pc->scsi_cmd->result = DID_OK << 16; | |
1da177e4 LT |
368 | } |
369 | host = pc->scsi_cmd->device->host; | |
370 | spin_lock_irqsave(host->host_lock, flags); | |
371 | pc->done(pc->scsi_cmd); | |
372 | spin_unlock_irqrestore(host->host_lock, flags); | |
373 | kfree(pc); | |
374 | kfree(rq); | |
375 | scsi->pc = NULL; | |
376 | return 0; | |
377 | } | |
378 | ||
379 | static inline unsigned long get_timeout(idescsi_pc_t *pc) | |
380 | { | |
381 | return max_t(unsigned long, WAIT_CMD, pc->timeout - jiffies); | |
382 | } | |
383 | ||
384 | static int idescsi_expiry(ide_drive_t *drive) | |
385 | { | |
d1be0a82 | 386 | idescsi_scsi_t *scsi = drive_to_idescsi(drive); |
1da177e4 LT |
387 | idescsi_pc_t *pc = scsi->pc; |
388 | ||
389 | #if IDESCSI_DEBUG_LOG | |
390 | printk(KERN_WARNING "idescsi_expiry called for %lu at %lu\n", pc->scsi_cmd->serial_number, jiffies); | |
391 | #endif | |
392 | set_bit(PC_TIMEDOUT, &pc->flags); | |
393 | ||
394 | return 0; /* we do not want the ide subsystem to retry */ | |
395 | } | |
396 | ||
397 | /* | |
398 | * Our interrupt handler. | |
399 | */ | |
400 | static ide_startstop_t idescsi_pc_intr (ide_drive_t *drive) | |
401 | { | |
402 | idescsi_scsi_t *scsi = drive_to_idescsi(drive); | |
403 | idescsi_pc_t *pc=scsi->pc; | |
404 | struct request *rq = pc->rq; | |
405 | atapi_bcount_t bcount; | |
406 | atapi_status_t status; | |
407 | atapi_ireason_t ireason; | |
408 | atapi_feature_t feature; | |
409 | ||
410 | unsigned int temp; | |
411 | ||
412 | #if IDESCSI_DEBUG_LOG | |
413 | printk (KERN_INFO "ide-scsi: Reached idescsi_pc_intr interrupt handler\n"); | |
414 | #endif /* IDESCSI_DEBUG_LOG */ | |
415 | ||
416 | if (test_bit(PC_TIMEDOUT, &pc->flags)){ | |
417 | #if IDESCSI_DEBUG_LOG | |
418 | printk(KERN_WARNING "idescsi_pc_intr: got timed out packet %lu at %lu\n", | |
419 | pc->scsi_cmd->serial_number, jiffies); | |
420 | #endif | |
421 | /* end this request now - scsi should retry it*/ | |
422 | idescsi_end_request (drive, 1, 0); | |
423 | return ide_stopped; | |
424 | } | |
425 | if (test_and_clear_bit (PC_DMA_IN_PROGRESS, &pc->flags)) { | |
426 | #if IDESCSI_DEBUG_LOG | |
427 | printk ("ide-scsi: %s: DMA complete\n", drive->name); | |
428 | #endif /* IDESCSI_DEBUG_LOG */ | |
429 | pc->actually_transferred=pc->request_transfer; | |
430 | (void) HWIF(drive)->ide_dma_end(drive); | |
431 | } | |
432 | ||
433 | feature.all = 0; | |
434 | /* Clear the interrupt */ | |
435 | status.all = HWIF(drive)->INB(IDE_STATUS_REG); | |
436 | ||
437 | if (!status.b.drq) { | |
438 | /* No more interrupts */ | |
439 | if (test_bit(IDESCSI_LOG_CMD, &scsi->log)) | |
440 | printk (KERN_INFO "Packet command completed, %d bytes transferred\n", pc->actually_transferred); | |
36e8e578 | 441 | local_irq_enable_in_hardirq(); |
1da177e4 LT |
442 | if (status.b.check) |
443 | rq->errors++; | |
444 | idescsi_end_request (drive, 1, 0); | |
445 | return ide_stopped; | |
446 | } | |
447 | bcount.b.low = HWIF(drive)->INB(IDE_BCOUNTL_REG); | |
448 | bcount.b.high = HWIF(drive)->INB(IDE_BCOUNTH_REG); | |
449 | ireason.all = HWIF(drive)->INB(IDE_IREASON_REG); | |
450 | ||
451 | if (ireason.b.cod) { | |
452 | printk(KERN_ERR "ide-scsi: CoD != 0 in idescsi_pc_intr\n"); | |
453 | return ide_do_reset (drive); | |
454 | } | |
455 | if (ireason.b.io) { | |
456 | temp = pc->actually_transferred + bcount.all; | |
457 | if (temp > pc->request_transfer) { | |
458 | if (temp > pc->buffer_size) { | |
459 | printk(KERN_ERR "ide-scsi: The scsi wants to " | |
460 | "send us more data than expected " | |
461 | "- discarding data\n"); | |
462 | temp = pc->buffer_size - pc->actually_transferred; | |
463 | if (temp) { | |
464 | clear_bit(PC_WRITING, &pc->flags); | |
465 | if (pc->sg) | |
466 | idescsi_input_buffers(drive, pc, temp); | |
467 | else | |
468 | drive->hwif->atapi_input_bytes(drive, pc->current_position, temp); | |
469 | printk(KERN_ERR "ide-scsi: transferred %d of %d bytes\n", temp, bcount.all); | |
470 | } | |
471 | pc->actually_transferred += temp; | |
472 | pc->current_position += temp; | |
473 | idescsi_discard_data(drive, bcount.all - temp); | |
474 | ide_set_handler(drive, &idescsi_pc_intr, get_timeout(pc), idescsi_expiry); | |
475 | return ide_started; | |
476 | } | |
477 | #if IDESCSI_DEBUG_LOG | |
478 | printk (KERN_NOTICE "ide-scsi: The scsi wants to send us more data than expected - allowing transfer\n"); | |
479 | #endif /* IDESCSI_DEBUG_LOG */ | |
480 | } | |
481 | } | |
482 | if (ireason.b.io) { | |
483 | clear_bit(PC_WRITING, &pc->flags); | |
484 | if (pc->sg) | |
485 | idescsi_input_buffers(drive, pc, bcount.all); | |
486 | else | |
487 | HWIF(drive)->atapi_input_bytes(drive, pc->current_position, bcount.all); | |
488 | } else { | |
489 | set_bit(PC_WRITING, &pc->flags); | |
490 | if (pc->sg) | |
491 | idescsi_output_buffers (drive, pc, bcount.all); | |
492 | else | |
493 | HWIF(drive)->atapi_output_bytes(drive, pc->current_position, bcount.all); | |
494 | } | |
495 | /* Update the current position */ | |
496 | pc->actually_transferred += bcount.all; | |
497 | pc->current_position += bcount.all; | |
498 | ||
499 | /* And set the interrupt handler again */ | |
500 | ide_set_handler(drive, &idescsi_pc_intr, get_timeout(pc), idescsi_expiry); | |
501 | return ide_started; | |
502 | } | |
503 | ||
504 | static ide_startstop_t idescsi_transfer_pc(ide_drive_t *drive) | |
505 | { | |
506 | ide_hwif_t *hwif = drive->hwif; | |
507 | idescsi_scsi_t *scsi = drive_to_idescsi(drive); | |
508 | idescsi_pc_t *pc = scsi->pc; | |
509 | atapi_ireason_t ireason; | |
510 | ide_startstop_t startstop; | |
511 | ||
512 | if (ide_wait_stat(&startstop,drive,DRQ_STAT,BUSY_STAT,WAIT_READY)) { | |
513 | printk(KERN_ERR "ide-scsi: Strange, packet command " | |
514 | "initiated yet DRQ isn't asserted\n"); | |
515 | return startstop; | |
516 | } | |
517 | ireason.all = HWIF(drive)->INB(IDE_IREASON_REG); | |
518 | if (!ireason.b.cod || ireason.b.io) { | |
519 | printk(KERN_ERR "ide-scsi: (IO,CoD) != (0,1) while " | |
520 | "issuing a packet command\n"); | |
521 | return ide_do_reset (drive); | |
522 | } | |
125e1874 | 523 | BUG_ON(HWGROUP(drive)->handler != NULL); |
1da177e4 LT |
524 | /* Set the interrupt routine */ |
525 | ide_set_handler(drive, &idescsi_pc_intr, get_timeout(pc), idescsi_expiry); | |
526 | /* Send the actual packet */ | |
527 | drive->hwif->atapi_output_bytes(drive, scsi->pc->c, 12); | |
528 | if (test_bit (PC_DMA_OK, &pc->flags)) { | |
529 | set_bit (PC_DMA_IN_PROGRESS, &pc->flags); | |
530 | hwif->dma_start(drive); | |
531 | } | |
532 | return ide_started; | |
533 | } | |
534 | ||
535 | static inline int idescsi_set_direction(idescsi_pc_t *pc) | |
536 | { | |
537 | switch (pc->c[0]) { | |
538 | case READ_6: case READ_10: case READ_12: | |
539 | clear_bit(PC_WRITING, &pc->flags); | |
540 | return 0; | |
541 | case WRITE_6: case WRITE_10: case WRITE_12: | |
542 | set_bit(PC_WRITING, &pc->flags); | |
543 | return 0; | |
544 | default: | |
545 | return 1; | |
546 | } | |
547 | } | |
548 | ||
549 | static int idescsi_map_sg(ide_drive_t *drive, idescsi_pc_t *pc) | |
550 | { | |
551 | ide_hwif_t *hwif = drive->hwif; | |
552 | struct scatterlist *sg, *scsi_sg; | |
553 | int segments; | |
554 | ||
555 | if (!pc->request_transfer || pc->request_transfer % 1024) | |
556 | return 1; | |
557 | ||
558 | if (idescsi_set_direction(pc)) | |
559 | return 1; | |
560 | ||
561 | sg = hwif->sg_table; | |
427d0bd4 BH |
562 | scsi_sg = scsi_sglist(pc->scsi_cmd); |
563 | segments = scsi_sg_count(pc->scsi_cmd); | |
1da177e4 LT |
564 | |
565 | if (segments > hwif->sg_max_nents) | |
566 | return 1; | |
567 | ||
427d0bd4 BH |
568 | hwif->sg_nents = segments; |
569 | memcpy(sg, scsi_sg, sizeof(*sg) * segments); | |
1da177e4 LT |
570 | |
571 | return 0; | |
572 | } | |
573 | ||
574 | /* | |
575 | * Issue a packet command | |
576 | */ | |
577 | static ide_startstop_t idescsi_issue_pc (ide_drive_t *drive, idescsi_pc_t *pc) | |
578 | { | |
579 | idescsi_scsi_t *scsi = drive_to_idescsi(drive); | |
580 | ide_hwif_t *hwif = drive->hwif; | |
581 | atapi_feature_t feature; | |
582 | atapi_bcount_t bcount; | |
583 | ||
584 | scsi->pc=pc; /* Set the current packet command */ | |
585 | pc->actually_transferred=0; /* We haven't transferred any data yet */ | |
586 | pc->current_position=pc->buffer; | |
587 | bcount.all = min(pc->request_transfer, 63 * 1024); /* Request to transfer the entire buffer at once */ | |
588 | ||
589 | feature.all = 0; | |
590 | if (drive->using_dma && !idescsi_map_sg(drive, pc)) { | |
591 | hwif->sg_mapped = 1; | |
592 | feature.b.dma = !hwif->dma_setup(drive); | |
593 | hwif->sg_mapped = 0; | |
594 | } | |
595 | ||
596 | SELECT_DRIVE(drive); | |
597 | if (IDE_CONTROL_REG) | |
598 | HWIF(drive)->OUTB(drive->ctl, IDE_CONTROL_REG); | |
599 | ||
600 | HWIF(drive)->OUTB(feature.all, IDE_FEATURE_REG); | |
601 | HWIF(drive)->OUTB(bcount.b.high, IDE_BCOUNTH_REG); | |
602 | HWIF(drive)->OUTB(bcount.b.low, IDE_BCOUNTL_REG); | |
603 | ||
604 | if (feature.b.dma) | |
605 | set_bit(PC_DMA_OK, &pc->flags); | |
606 | ||
607 | if (test_bit(IDESCSI_DRQ_INTERRUPT, &scsi->flags)) { | |
125e1874 | 608 | BUG_ON(HWGROUP(drive)->handler != NULL); |
1da177e4 LT |
609 | ide_set_handler(drive, &idescsi_transfer_pc, |
610 | get_timeout(pc), idescsi_expiry); | |
611 | /* Issue the packet command */ | |
612 | HWIF(drive)->OUTB(WIN_PACKETCMD, IDE_COMMAND_REG); | |
613 | return ide_started; | |
614 | } else { | |
615 | /* Issue the packet command */ | |
616 | HWIF(drive)->OUTB(WIN_PACKETCMD, IDE_COMMAND_REG); | |
617 | return idescsi_transfer_pc(drive); | |
618 | } | |
619 | } | |
620 | ||
621 | /* | |
622 | * idescsi_do_request is our request handling function. | |
623 | */ | |
624 | static ide_startstop_t idescsi_do_request (ide_drive_t *drive, struct request *rq, sector_t block) | |
625 | { | |
626 | #if IDESCSI_DEBUG_LOG | |
cdd60262 | 627 | printk (KERN_INFO "dev: %s, cmd: %x, errors: %d\n", rq->rq_disk->disk_name,rq->cmd[0],rq->errors); |
1da177e4 LT |
628 | printk (KERN_INFO "sector: %ld, nr_sectors: %ld, current_nr_sectors: %d\n",rq->sector,rq->nr_sectors,rq->current_nr_sectors); |
629 | #endif /* IDESCSI_DEBUG_LOG */ | |
630 | ||
4aff5e23 | 631 | if (blk_sense_request(rq) || blk_special_request(rq)) { |
1da177e4 LT |
632 | return idescsi_issue_pc (drive, (idescsi_pc_t *) rq->special); |
633 | } | |
634 | blk_dump_rq_flags(rq, "ide-scsi: unsup command"); | |
635 | idescsi_end_request (drive, 0, 0); | |
636 | return ide_stopped; | |
637 | } | |
638 | ||
7662d046 | 639 | #ifdef CONFIG_IDE_PROC_FS |
1da177e4 LT |
640 | static void idescsi_add_settings(ide_drive_t *drive) |
641 | { | |
642 | idescsi_scsi_t *scsi = drive_to_idescsi(drive); | |
643 | ||
644 | /* | |
1497943e | 645 | * drive setting name read/write data type min max mul_factor div_factor data pointer set function |
1da177e4 | 646 | */ |
1497943e BZ |
647 | ide_add_setting(drive, "bios_cyl", SETTING_RW, TYPE_INT, 0, 1023, 1, 1, &drive->bios_cyl, NULL); |
648 | ide_add_setting(drive, "bios_head", SETTING_RW, TYPE_BYTE, 0, 255, 1, 1, &drive->bios_head, NULL); | |
649 | ide_add_setting(drive, "bios_sect", SETTING_RW, TYPE_BYTE, 0, 63, 1, 1, &drive->bios_sect, NULL); | |
650 | ide_add_setting(drive, "transform", SETTING_RW, TYPE_INT, 0, 3, 1, 1, &scsi->transform, NULL); | |
651 | ide_add_setting(drive, "log", SETTING_RW, TYPE_INT, 0, 1, 1, 1, &scsi->log, NULL); | |
1da177e4 | 652 | } |
7662d046 BZ |
653 | #else |
654 | static inline void idescsi_add_settings(ide_drive_t *drive) { ; } | |
655 | #endif | |
1da177e4 LT |
656 | |
657 | /* | |
658 | * Driver initialization. | |
659 | */ | |
660 | static void idescsi_setup (ide_drive_t *drive, idescsi_scsi_t *scsi) | |
661 | { | |
1da177e4 LT |
662 | if (drive->id && (drive->id->config & 0x0060) == 0x20) |
663 | set_bit (IDESCSI_DRQ_INTERRUPT, &scsi->flags); | |
1da177e4 LT |
664 | clear_bit(IDESCSI_SG_TRANSFORM, &scsi->transform); |
665 | #if IDESCSI_DEBUG_LOG | |
666 | set_bit(IDESCSI_LOG_CMD, &scsi->log); | |
667 | #endif /* IDESCSI_DEBUG_LOG */ | |
668 | idescsi_add_settings(drive); | |
1da177e4 LT |
669 | } |
670 | ||
b62735d9 | 671 | static void ide_scsi_remove(ide_drive_t *drive) |
1da177e4 LT |
672 | { |
673 | struct Scsi_Host *scsihost = drive->driver_data; | |
674 | struct ide_scsi_obj *scsi = scsihost_to_idescsi(scsihost); | |
675 | struct gendisk *g = scsi->disk; | |
676 | ||
6fdea8db | 677 | scsi_remove_host(scsihost); |
7662d046 | 678 | ide_proc_unregister_driver(drive, scsi->driver); |
1da177e4 LT |
679 | |
680 | ide_unregister_region(g); | |
681 | ||
682 | drive->driver_data = NULL; | |
683 | g->private_data = NULL; | |
684 | put_disk(g); | |
685 | ||
1da177e4 | 686 | ide_scsi_put(scsi); |
1da177e4 LT |
687 | } |
688 | ||
b62735d9 | 689 | static int ide_scsi_probe(ide_drive_t *); |
1da177e4 | 690 | |
ecfd80e4 | 691 | #ifdef CONFIG_IDE_PROC_FS |
1da177e4 LT |
692 | static ide_proc_entry_t idescsi_proc[] = { |
693 | { "capacity", S_IFREG|S_IRUGO, proc_ide_read_capacity, NULL }, | |
694 | { NULL, 0, NULL, NULL } | |
695 | }; | |
1da177e4 LT |
696 | #endif |
697 | ||
1da177e4 | 698 | static ide_driver_t idescsi_driver = { |
8604affd | 699 | .gen_driver = { |
4ef3b8f4 | 700 | .owner = THIS_MODULE, |
8604affd BZ |
701 | .name = "ide-scsi", |
702 | .bus = &ide_bus_type, | |
8604affd | 703 | }, |
b62735d9 MP |
704 | .probe = ide_scsi_probe, |
705 | .remove = ide_scsi_remove, | |
1da177e4 LT |
706 | .version = IDESCSI_VERSION, |
707 | .media = ide_scsi, | |
1da177e4 | 708 | .supports_dsc_overlap = 0, |
1da177e4 LT |
709 | .do_request = idescsi_do_request, |
710 | .end_request = idescsi_end_request, | |
711 | .error = idescsi_atapi_error, | |
712 | .abort = idescsi_atapi_abort, | |
7662d046 BZ |
713 | #ifdef CONFIG_IDE_PROC_FS |
714 | .proc = idescsi_proc, | |
715 | #endif | |
1da177e4 LT |
716 | }; |
717 | ||
718 | static int idescsi_ide_open(struct inode *inode, struct file *filp) | |
719 | { | |
720 | struct gendisk *disk = inode->i_bdev->bd_disk; | |
721 | struct ide_scsi_obj *scsi; | |
1da177e4 LT |
722 | |
723 | if (!(scsi = ide_scsi_get(disk))) | |
724 | return -ENXIO; | |
725 | ||
1da177e4 LT |
726 | return 0; |
727 | } | |
728 | ||
729 | static int idescsi_ide_release(struct inode *inode, struct file *filp) | |
730 | { | |
731 | struct gendisk *disk = inode->i_bdev->bd_disk; | |
732 | struct ide_scsi_obj *scsi = ide_scsi_g(disk); | |
1da177e4 LT |
733 | |
734 | ide_scsi_put(scsi); | |
735 | ||
736 | return 0; | |
737 | } | |
738 | ||
739 | static int idescsi_ide_ioctl(struct inode *inode, struct file *file, | |
740 | unsigned int cmd, unsigned long arg) | |
741 | { | |
742 | struct block_device *bdev = inode->i_bdev; | |
743 | struct ide_scsi_obj *scsi = ide_scsi_g(bdev->bd_disk); | |
744 | return generic_ide_ioctl(scsi->drive, file, bdev, cmd, arg); | |
745 | } | |
746 | ||
747 | static struct block_device_operations idescsi_ops = { | |
748 | .owner = THIS_MODULE, | |
749 | .open = idescsi_ide_open, | |
750 | .release = idescsi_ide_release, | |
751 | .ioctl = idescsi_ide_ioctl, | |
752 | }; | |
753 | ||
1da177e4 LT |
754 | static int idescsi_slave_configure(struct scsi_device * sdp) |
755 | { | |
756 | /* Configure detected device */ | |
427d0bd4 BH |
757 | sdp->use_10_for_rw = 1; |
758 | sdp->use_10_for_ms = 1; | |
1da177e4 LT |
759 | scsi_adjust_queue_depth(sdp, MSG_SIMPLE_TAG, sdp->host->cmd_per_lun); |
760 | return 0; | |
761 | } | |
762 | ||
763 | static const char *idescsi_info (struct Scsi_Host *host) | |
764 | { | |
765 | return "SCSI host adapter emulation for IDE ATAPI devices"; | |
766 | } | |
767 | ||
768 | static int idescsi_ioctl (struct scsi_device *dev, int cmd, void __user *arg) | |
769 | { | |
770 | idescsi_scsi_t *scsi = scsihost_to_idescsi(dev->host); | |
771 | ||
772 | if (cmd == SG_SET_TRANSFORM) { | |
773 | if (arg) | |
774 | set_bit(IDESCSI_SG_TRANSFORM, &scsi->transform); | |
775 | else | |
776 | clear_bit(IDESCSI_SG_TRANSFORM, &scsi->transform); | |
777 | return 0; | |
778 | } else if (cmd == SG_GET_TRANSFORM) | |
779 | return put_user(test_bit(IDESCSI_SG_TRANSFORM, &scsi->transform), (int __user *) arg); | |
780 | return -EINVAL; | |
781 | } | |
782 | ||
1da177e4 LT |
783 | static int idescsi_queue (struct scsi_cmnd *cmd, |
784 | void (*done)(struct scsi_cmnd *)) | |
785 | { | |
786 | struct Scsi_Host *host = cmd->device->host; | |
787 | idescsi_scsi_t *scsi = scsihost_to_idescsi(host); | |
788 | ide_drive_t *drive = scsi->drive; | |
789 | struct request *rq = NULL; | |
790 | idescsi_pc_t *pc = NULL; | |
791 | ||
792 | if (!drive) { | |
017560fc | 793 | scmd_printk (KERN_ERR, cmd, "drive not present\n"); |
1da177e4 LT |
794 | goto abort; |
795 | } | |
796 | scsi = drive_to_idescsi(drive); | |
797 | pc = kmalloc (sizeof (idescsi_pc_t), GFP_ATOMIC); | |
798 | rq = kmalloc (sizeof (struct request), GFP_ATOMIC); | |
799 | if (rq == NULL || pc == NULL) { | |
800 | printk (KERN_ERR "ide-scsi: %s: out of memory\n", drive->name); | |
801 | goto abort; | |
802 | } | |
803 | ||
804 | memset (pc->c, 0, 12); | |
805 | pc->flags = 0; | |
806 | pc->rq = rq; | |
807 | memcpy (pc->c, cmd->cmnd, cmd->cmd_len); | |
427d0bd4 BH |
808 | pc->buffer = NULL; |
809 | pc->sg = scsi_sglist(cmd); | |
c79d88b7 | 810 | pc->sg_cnt = scsi_sg_count(cmd); |
1da177e4 | 811 | pc->b_count = 0; |
427d0bd4 | 812 | pc->request_transfer = pc->buffer_size = scsi_bufflen(cmd); |
1da177e4 LT |
813 | pc->scsi_cmd = cmd; |
814 | pc->done = done; | |
815 | pc->timeout = jiffies + cmd->timeout_per_command; | |
816 | ||
1da177e4 LT |
817 | if (test_bit(IDESCSI_LOG_CMD, &scsi->log)) { |
818 | printk ("ide-scsi: %s: que %lu, cmd = ", drive->name, cmd->serial_number); | |
819 | hexdump(cmd->cmnd, cmd->cmd_len); | |
820 | if (memcmp(pc->c, cmd->cmnd, cmd->cmd_len)) { | |
821 | printk ("ide-scsi: %s: que %lu, tsl = ", drive->name, cmd->serial_number); | |
822 | hexdump(pc->c, 12); | |
823 | } | |
824 | } | |
825 | ||
826 | ide_init_drive_cmd (rq); | |
827 | rq->special = (char *) pc; | |
4aff5e23 | 828 | rq->cmd_type = REQ_TYPE_SPECIAL; |
1da177e4 LT |
829 | spin_unlock_irq(host->host_lock); |
830 | rq->rq_disk = scsi->disk; | |
831 | (void) ide_do_drive_cmd (drive, rq, ide_end); | |
832 | spin_lock_irq(host->host_lock); | |
833 | return 0; | |
834 | abort: | |
c9475cb0 JJ |
835 | kfree (pc); |
836 | kfree (rq); | |
1da177e4 LT |
837 | cmd->result = DID_ERROR << 16; |
838 | done(cmd); | |
839 | return 0; | |
840 | } | |
841 | ||
842 | static int idescsi_eh_abort (struct scsi_cmnd *cmd) | |
843 | { | |
844 | idescsi_scsi_t *scsi = scsihost_to_idescsi(cmd->device->host); | |
845 | ide_drive_t *drive = scsi->drive; | |
846 | int busy; | |
847 | int ret = FAILED; | |
848 | ||
849 | /* In idescsi_eh_abort we try to gently pry our command from the ide subsystem */ | |
850 | ||
851 | if (test_bit(IDESCSI_LOG_CMD, &scsi->log)) | |
852 | printk (KERN_WARNING "ide-scsi: abort called for %lu\n", cmd->serial_number); | |
853 | ||
854 | if (!drive) { | |
855 | printk (KERN_WARNING "ide-scsi: Drive not set in idescsi_eh_abort\n"); | |
856 | WARN_ON(1); | |
857 | goto no_drive; | |
858 | } | |
859 | ||
860 | /* First give it some more time, how much is "right" is hard to say :-( */ | |
861 | ||
862 | busy = ide_wait_not_busy(HWIF(drive), 100); /* FIXME - uses mdelay which causes latency? */ | |
863 | if (test_bit(IDESCSI_LOG_CMD, &scsi->log)) | |
864 | printk (KERN_WARNING "ide-scsi: drive did%s become ready\n", busy?" not":""); | |
865 | ||
866 | spin_lock_irq(&ide_lock); | |
867 | ||
868 | /* If there is no pc running we're done (our interrupt took care of it) */ | |
869 | if (!scsi->pc) { | |
870 | ret = SUCCESS; | |
871 | goto ide_unlock; | |
872 | } | |
873 | ||
874 | /* It's somewhere in flight. Does ide subsystem agree? */ | |
875 | if (scsi->pc->scsi_cmd->serial_number == cmd->serial_number && !busy && | |
876 | elv_queue_empty(drive->queue) && HWGROUP(drive)->rq != scsi->pc->rq) { | |
877 | /* | |
878 | * FIXME - not sure this condition can ever occur | |
879 | */ | |
880 | printk (KERN_ERR "ide-scsi: cmd aborted!\n"); | |
881 | ||
4aff5e23 | 882 | if (blk_sense_request(scsi->pc->rq)) |
1da177e4 LT |
883 | kfree(scsi->pc->buffer); |
884 | kfree(scsi->pc->rq); | |
885 | kfree(scsi->pc); | |
886 | scsi->pc = NULL; | |
887 | ||
888 | ret = SUCCESS; | |
889 | } | |
890 | ||
891 | ide_unlock: | |
892 | spin_unlock_irq(&ide_lock); | |
893 | no_drive: | |
894 | if (test_bit(IDESCSI_LOG_CMD, &scsi->log)) | |
895 | printk (KERN_WARNING "ide-scsi: abort returns %s\n", ret == SUCCESS?"success":"failed"); | |
896 | ||
897 | return ret; | |
898 | } | |
899 | ||
900 | static int idescsi_eh_reset (struct scsi_cmnd *cmd) | |
901 | { | |
902 | struct request *req; | |
903 | idescsi_scsi_t *scsi = scsihost_to_idescsi(cmd->device->host); | |
904 | ide_drive_t *drive = scsi->drive; | |
905 | int ready = 0; | |
906 | int ret = SUCCESS; | |
907 | ||
908 | /* In idescsi_eh_reset we forcefully remove the command from the ide subsystem and reset the device. */ | |
909 | ||
910 | if (test_bit(IDESCSI_LOG_CMD, &scsi->log)) | |
911 | printk (KERN_WARNING "ide-scsi: reset called for %lu\n", cmd->serial_number); | |
912 | ||
913 | if (!drive) { | |
914 | printk (KERN_WARNING "ide-scsi: Drive not set in idescsi_eh_reset\n"); | |
915 | WARN_ON(1); | |
916 | return FAILED; | |
917 | } | |
918 | ||
df0ae249 JG |
919 | spin_lock_irq(cmd->device->host->host_lock); |
920 | spin_lock(&ide_lock); | |
1da177e4 LT |
921 | |
922 | if (!scsi->pc || (req = scsi->pc->rq) != HWGROUP(drive)->rq || !HWGROUP(drive)->handler) { | |
923 | printk (KERN_WARNING "ide-scsi: No active request in idescsi_eh_reset\n"); | |
924 | spin_unlock(&ide_lock); | |
df0ae249 | 925 | spin_unlock_irq(cmd->device->host->host_lock); |
1da177e4 LT |
926 | return FAILED; |
927 | } | |
928 | ||
929 | /* kill current request */ | |
930 | blkdev_dequeue_request(req); | |
8ffdc655 | 931 | end_that_request_last(req, 0); |
4aff5e23 | 932 | if (blk_sense_request(req)) |
1da177e4 LT |
933 | kfree(scsi->pc->buffer); |
934 | kfree(scsi->pc); | |
935 | scsi->pc = NULL; | |
936 | kfree(req); | |
937 | ||
938 | /* now nuke the drive queue */ | |
939 | while ((req = elv_next_request(drive->queue))) { | |
940 | blkdev_dequeue_request(req); | |
8ffdc655 | 941 | end_that_request_last(req, 0); |
1da177e4 LT |
942 | } |
943 | ||
944 | HWGROUP(drive)->rq = NULL; | |
945 | HWGROUP(drive)->handler = NULL; | |
946 | HWGROUP(drive)->busy = 1; /* will set this to zero when ide reset finished */ | |
df0ae249 | 947 | spin_unlock(&ide_lock); |
1da177e4 LT |
948 | |
949 | ide_do_reset(drive); | |
950 | ||
951 | /* ide_do_reset starts a polling handler which restarts itself every 50ms until the reset finishes */ | |
952 | ||
953 | do { | |
1da177e4 | 954 | spin_unlock_irq(cmd->device->host->host_lock); |
df0ae249 | 955 | msleep(50); |
1da177e4 LT |
956 | spin_lock_irq(cmd->device->host->host_lock); |
957 | } while ( HWGROUP(drive)->handler ); | |
958 | ||
959 | ready = drive_is_ready(drive); | |
960 | HWGROUP(drive)->busy--; | |
961 | if (!ready) { | |
962 | printk (KERN_ERR "ide-scsi: reset failed!\n"); | |
963 | ret = FAILED; | |
964 | } | |
965 | ||
df0ae249 | 966 | spin_unlock_irq(cmd->device->host->host_lock); |
1da177e4 LT |
967 | return ret; |
968 | } | |
969 | ||
970 | static int idescsi_bios(struct scsi_device *sdev, struct block_device *bdev, | |
971 | sector_t capacity, int *parm) | |
972 | { | |
973 | idescsi_scsi_t *idescsi = scsihost_to_idescsi(sdev->host); | |
974 | ide_drive_t *drive = idescsi->drive; | |
975 | ||
976 | if (drive->bios_cyl && drive->bios_head && drive->bios_sect) { | |
977 | parm[0] = drive->bios_head; | |
978 | parm[1] = drive->bios_sect; | |
979 | parm[2] = drive->bios_cyl; | |
980 | } | |
981 | return 0; | |
982 | } | |
983 | ||
984 | static struct scsi_host_template idescsi_template = { | |
985 | .module = THIS_MODULE, | |
986 | .name = "idescsi", | |
987 | .info = idescsi_info, | |
988 | .slave_configure = idescsi_slave_configure, | |
989 | .ioctl = idescsi_ioctl, | |
990 | .queuecommand = idescsi_queue, | |
991 | .eh_abort_handler = idescsi_eh_abort, | |
992 | .eh_host_reset_handler = idescsi_eh_reset, | |
993 | .bios_param = idescsi_bios, | |
994 | .can_queue = 40, | |
995 | .this_id = -1, | |
996 | .sg_tablesize = 256, | |
997 | .cmd_per_lun = 5, | |
998 | .max_sectors = 128, | |
999 | .use_clustering = DISABLE_CLUSTERING, | |
1000 | .emulated = 1, | |
1001 | .proc_name = "ide-scsi", | |
1002 | }; | |
1003 | ||
b62735d9 | 1004 | static int ide_scsi_probe(ide_drive_t *drive) |
1da177e4 LT |
1005 | { |
1006 | idescsi_scsi_t *idescsi; | |
1007 | struct Scsi_Host *host; | |
1008 | struct gendisk *g; | |
1009 | static int warned; | |
1010 | int err = -ENOMEM; | |
1011 | ||
1012 | if (!warned && drive->media == ide_cdrom) { | |
1013 | printk(KERN_WARNING "ide-scsi is deprecated for cd burning! Use ide-cd and give dev=/dev/hdX as device\n"); | |
1014 | warned = 1; | |
1015 | } | |
1016 | ||
aaeab80b AC |
1017 | if (idescsi_nocd && drive->media == ide_cdrom) |
1018 | return -ENODEV; | |
1019 | ||
1da177e4 LT |
1020 | if (!strstr("ide-scsi", drive->driver_req) || |
1021 | !drive->present || | |
1022 | drive->media == ide_disk || | |
1023 | !(host = scsi_host_alloc(&idescsi_template,sizeof(idescsi_scsi_t)))) | |
8604affd | 1024 | return -ENODEV; |
1da177e4 LT |
1025 | |
1026 | g = alloc_disk(1 << PARTN_BITS); | |
1027 | if (!g) | |
1028 | goto out_host_put; | |
1029 | ||
1030 | ide_init_disk(g, drive); | |
1031 | ||
1032 | host->max_id = 1; | |
1033 | ||
1034 | #if IDESCSI_DEBUG_LOG | |
1035 | if (drive->id->last_lun) | |
1036 | printk(KERN_NOTICE "%s: id->last_lun=%u\n", drive->name, drive->id->last_lun); | |
1037 | #endif | |
1038 | if ((drive->id->last_lun & 0x7) != 7) | |
1039 | host->max_lun = (drive->id->last_lun & 0x7) + 1; | |
1040 | else | |
1041 | host->max_lun = 1; | |
1042 | ||
1043 | drive->driver_data = host; | |
1044 | idescsi = scsihost_to_idescsi(host); | |
1045 | idescsi->drive = drive; | |
1046 | idescsi->driver = &idescsi_driver; | |
1047 | idescsi->host = host; | |
1048 | idescsi->disk = g; | |
1049 | g->private_data = &idescsi->driver; | |
7662d046 | 1050 | ide_proc_register_driver(drive, &idescsi_driver); |
8604affd BZ |
1051 | err = 0; |
1052 | idescsi_setup(drive, idescsi); | |
1053 | g->fops = &idescsi_ops; | |
1054 | ide_register_region(g); | |
1055 | err = scsi_add_host(host, &drive->gendev); | |
1da177e4 | 1056 | if (!err) { |
8604affd BZ |
1057 | scsi_scan_host(host); |
1058 | return 0; | |
1da177e4 | 1059 | } |
8604affd BZ |
1060 | /* fall through on error */ |
1061 | ide_unregister_region(g); | |
7662d046 | 1062 | ide_proc_unregister_driver(drive, &idescsi_driver); |
1da177e4 LT |
1063 | |
1064 | put_disk(g); | |
1065 | out_host_put: | |
1066 | scsi_host_put(host); | |
1067 | return err; | |
1068 | } | |
1069 | ||
1070 | static int __init init_idescsi_module(void) | |
1071 | { | |
8604affd | 1072 | return driver_register(&idescsi_driver.gen_driver); |
1da177e4 LT |
1073 | } |
1074 | ||
1075 | static void __exit exit_idescsi_module(void) | |
1076 | { | |
8604affd | 1077 | driver_unregister(&idescsi_driver.gen_driver); |
1da177e4 LT |
1078 | } |
1079 | ||
aaeab80b AC |
1080 | module_param(idescsi_nocd, int, 0600); |
1081 | MODULE_PARM_DESC(idescsi_nocd, "Disable handling of CD-ROMs so they may be driven by ide-cd"); | |
1da177e4 LT |
1082 | module_init(init_idescsi_module); |
1083 | module_exit(exit_idescsi_module); | |
1084 | MODULE_LICENSE("GPL"); |