Commit | Line | Data |
---|---|---|
1da177e4 | 1 | /* |
59bca8cc BZ |
2 | * Copyright (C) 1996-1999 Gadi Oxman <gadio@netvision.net.il> |
3 | * Copyright (C) 2004-2005 Bartlomiej Zolnierkiewicz | |
1da177e4 LT |
4 | */ |
5 | ||
6 | /* | |
7 | * Emulation of a SCSI host adapter for IDE ATAPI devices. | |
8 | * | |
9 | * With this driver, one can use the Linux SCSI drivers instead of the | |
10 | * native IDE ATAPI drivers. | |
11 | * | |
12 | * Ver 0.1 Dec 3 96 Initial version. | |
13 | * Ver 0.2 Jan 26 97 Fixed bug in cleanup_module() and added emulation | |
14 | * of MODE_SENSE_6/MODE_SELECT_6 for cdroms. Thanks | |
15 | * to Janos Farkas for pointing this out. | |
16 | * Avoid using bitfields in structures for m68k. | |
17 | * Added Scatter/Gather and DMA support. | |
18 | * Ver 0.4 Dec 7 97 Add support for ATAPI PD/CD drives. | |
19 | * Use variable timeout for each command. | |
20 | * Ver 0.5 Jan 2 98 Fix previous PD/CD support. | |
21 | * Allow disabling of SCSI-6 to SCSI-10 transformation. | |
22 | * Ver 0.6 Jan 27 98 Allow disabling of SCSI command translation layer | |
23 | * for access through /dev/sg. | |
24 | * Fix MODE_SENSE_6/MODE_SELECT_6/INQUIRY translation. | |
25 | * Ver 0.7 Dec 04 98 Ignore commands where lun != 0 to avoid multiple | |
26 | * detection of devices with CONFIG_SCSI_MULTI_LUN | |
27 | * Ver 0.8 Feb 05 99 Optical media need translation too. Reverse 0.7. | |
28 | * Ver 0.9 Jul 04 99 Fix a bug in SG_SET_TRANSFORM. | |
29 | * Ver 0.91 Jun 10 02 Fix "off by one" error in transforms | |
30 | * Ver 0.92 Dec 31 02 Implement new SCSI mid level API | |
31 | */ | |
32 | ||
33 | #define IDESCSI_VERSION "0.92" | |
34 | ||
35 | #include <linux/module.h> | |
1da177e4 LT |
36 | #include <linux/types.h> |
37 | #include <linux/string.h> | |
38 | #include <linux/kernel.h> | |
39 | #include <linux/mm.h> | |
40 | #include <linux/ioport.h> | |
41 | #include <linux/blkdev.h> | |
42 | #include <linux/errno.h> | |
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 | ||
63 | typedef struct idescsi_pc_s { | |
64 | u8 c[12]; /* Actual packet bytes */ | |
65 | int request_transfer; /* Bytes to transfer */ | |
66 | int actually_transferred; /* Bytes actually transferred */ | |
67 | int buffer_size; /* Size of our data buffer */ | |
68 | struct request *rq; /* The corresponding request */ | |
69 | u8 *buffer; /* Data buffer */ | |
70 | u8 *current_position; /* Pointer into the above buffer */ | |
71 | struct scatterlist *sg; /* Scatter gather table */ | |
c79d88b7 | 72 | unsigned int sg_cnt; /* Number of entries in sg */ |
1da177e4 LT |
73 | int b_count; /* Bytes transferred from current entry */ |
74 | struct scsi_cmnd *scsi_cmd; /* SCSI command */ | |
75 | void (*done)(struct scsi_cmnd *); /* Scsi completion routine */ | |
76 | unsigned long flags; /* Status/Action flags */ | |
77 | unsigned long timeout; /* Command timeout */ | |
78 | } idescsi_pc_t; | |
79 | ||
80 | /* | |
81 | * Packet command status bits. | |
82 | */ | |
83 | #define PC_DMA_IN_PROGRESS 0 /* 1 while DMA in progress */ | |
84 | #define PC_WRITING 1 /* Data direction */ | |
1da177e4 LT |
85 | #define PC_TIMEDOUT 3 /* command timed out */ |
86 | #define PC_DMA_OK 4 /* Use DMA */ | |
87 | ||
88 | /* | |
89 | * SCSI command transformation layer | |
90 | */ | |
1da177e4 LT |
91 | #define IDESCSI_SG_TRANSFORM 1 /* /dev/sg transformation */ |
92 | ||
93 | /* | |
94 | * Log flags | |
95 | */ | |
96 | #define IDESCSI_LOG_CMD 0 /* Log SCSI commands */ | |
97 | ||
98 | typedef struct ide_scsi_obj { | |
99 | ide_drive_t *drive; | |
100 | ide_driver_t *driver; | |
101 | struct gendisk *disk; | |
102 | struct Scsi_Host *host; | |
103 | ||
104 | idescsi_pc_t *pc; /* Current packet command */ | |
105 | unsigned long flags; /* Status/Action flags */ | |
106 | unsigned long transform; /* SCSI cmd translation layer */ | |
107 | unsigned long log; /* log flags */ | |
108 | } idescsi_scsi_t; | |
109 | ||
e723ccd8 | 110 | static DEFINE_MUTEX(idescsi_ref_mutex); |
aaeab80b | 111 | static int idescsi_nocd; /* Set by module param to skip cd */ |
1da177e4 LT |
112 | |
113 | #define ide_scsi_g(disk) \ | |
114 | container_of((disk)->private_data, struct ide_scsi_obj, driver) | |
115 | ||
116 | static struct ide_scsi_obj *ide_scsi_get(struct gendisk *disk) | |
117 | { | |
118 | struct ide_scsi_obj *scsi = NULL; | |
119 | ||
e723ccd8 | 120 | mutex_lock(&idescsi_ref_mutex); |
1da177e4 LT |
121 | scsi = ide_scsi_g(disk); |
122 | if (scsi) | |
123 | scsi_host_get(scsi->host); | |
e723ccd8 | 124 | mutex_unlock(&idescsi_ref_mutex); |
1da177e4 LT |
125 | return scsi; |
126 | } | |
127 | ||
128 | static void ide_scsi_put(struct ide_scsi_obj *scsi) | |
129 | { | |
e723ccd8 | 130 | mutex_lock(&idescsi_ref_mutex); |
1da177e4 | 131 | scsi_host_put(scsi->host); |
e723ccd8 | 132 | mutex_unlock(&idescsi_ref_mutex); |
1da177e4 LT |
133 | } |
134 | ||
135 | static inline idescsi_scsi_t *scsihost_to_idescsi(struct Scsi_Host *host) | |
136 | { | |
137 | return (idescsi_scsi_t*) (&host[1]); | |
138 | } | |
139 | ||
140 | static inline idescsi_scsi_t *drive_to_idescsi(ide_drive_t *ide_drive) | |
141 | { | |
142 | return scsihost_to_idescsi(ide_drive->driver_data); | |
143 | } | |
144 | ||
145 | /* | |
146 | * Per ATAPI device status bits. | |
147 | */ | |
148 | #define IDESCSI_DRQ_INTERRUPT 0 /* DRQ interrupt device */ | |
149 | ||
150 | /* | |
151 | * ide-scsi requests. | |
152 | */ | |
153 | #define IDESCSI_PC_RQ 90 | |
154 | ||
155 | static void idescsi_discard_data (ide_drive_t *drive, unsigned int bcount) | |
156 | { | |
157 | while (bcount--) | |
158 | (void) HWIF(drive)->INB(IDE_DATA_REG); | |
159 | } | |
160 | ||
161 | static void idescsi_output_zeros (ide_drive_t *drive, unsigned int bcount) | |
162 | { | |
163 | while (bcount--) | |
164 | HWIF(drive)->OUTB(0, IDE_DATA_REG); | |
165 | } | |
166 | ||
167 | /* | |
168 | * PIO data transfer routines using the scatter gather table. | |
169 | */ | |
170 | static void idescsi_input_buffers (ide_drive_t *drive, idescsi_pc_t *pc, unsigned int bcount) | |
171 | { | |
172 | int count; | |
173 | char *buf; | |
174 | ||
175 | while (bcount) { | |
1da177e4 | 176 | count = min(pc->sg->length - pc->b_count, bcount); |
45711f1a | 177 | if (PageHighMem(sg_page(pc->sg))) { |
a717f773 AM |
178 | unsigned long flags; |
179 | ||
180 | local_irq_save(flags); | |
45711f1a | 181 | buf = kmap_atomic(sg_page(pc->sg), KM_IRQ0) + |
a717f773 AM |
182 | pc->sg->offset; |
183 | drive->hwif->atapi_input_bytes(drive, | |
184 | buf + pc->b_count, count); | |
185 | kunmap_atomic(buf - pc->sg->offset, KM_IRQ0); | |
186 | local_irq_restore(flags); | |
187 | } else { | |
45711f1a | 188 | buf = sg_virt(pc->sg); |
a717f773 AM |
189 | drive->hwif->atapi_input_bytes(drive, |
190 | buf + pc->b_count, count); | |
191 | } | |
192 | bcount -= count; pc->b_count += count; | |
1da177e4 | 193 | if (pc->b_count == pc->sg->length) { |
c79d88b7 | 194 | if (!--pc->sg_cnt) |
d274a987 JA |
195 | break; |
196 | pc->sg = sg_next(pc->sg); | |
1da177e4 LT |
197 | pc->b_count = 0; |
198 | } | |
199 | } | |
d274a987 JA |
200 | |
201 | if (bcount) { | |
202 | printk (KERN_ERR "ide-scsi: scatter gather table too small, discarding data\n"); | |
203 | idescsi_discard_data (drive, bcount); | |
204 | } | |
1da177e4 LT |
205 | } |
206 | ||
207 | static void idescsi_output_buffers (ide_drive_t *drive, idescsi_pc_t *pc, unsigned int bcount) | |
208 | { | |
209 | int count; | |
210 | char *buf; | |
211 | ||
212 | while (bcount) { | |
1da177e4 | 213 | count = min(pc->sg->length - pc->b_count, bcount); |
45711f1a | 214 | if (PageHighMem(sg_page(pc->sg))) { |
a717f773 AM |
215 | unsigned long flags; |
216 | ||
217 | local_irq_save(flags); | |
45711f1a | 218 | buf = kmap_atomic(sg_page(pc->sg), KM_IRQ0) + |
a717f773 AM |
219 | pc->sg->offset; |
220 | drive->hwif->atapi_output_bytes(drive, | |
221 | buf + pc->b_count, count); | |
222 | kunmap_atomic(buf - pc->sg->offset, KM_IRQ0); | |
223 | local_irq_restore(flags); | |
224 | } else { | |
45711f1a | 225 | buf = sg_virt(pc->sg); |
a717f773 AM |
226 | drive->hwif->atapi_output_bytes(drive, |
227 | buf + pc->b_count, count); | |
228 | } | |
229 | bcount -= count; pc->b_count += count; | |
1da177e4 | 230 | if (pc->b_count == pc->sg->length) { |
c79d88b7 | 231 | if (!--pc->sg_cnt) |
d274a987 JA |
232 | break; |
233 | pc->sg = sg_next(pc->sg); | |
1da177e4 LT |
234 | pc->b_count = 0; |
235 | } | |
236 | } | |
d274a987 JA |
237 | |
238 | if (bcount) { | |
239 | printk (KERN_ERR "ide-scsi: scatter gather table too small, padding with zeros\n"); | |
240 | idescsi_output_zeros (drive, bcount); | |
241 | } | |
1da177e4 LT |
242 | } |
243 | ||
69ae6fee BZ |
244 | static void ide_scsi_hex_dump(u8 *data, int len) |
245 | { | |
246 | print_hex_dump(KERN_CONT, "", DUMP_PREFIX_NONE, 16, 1, data, len, 0); | |
247 | } | |
248 | ||
1da177e4 LT |
249 | static int idescsi_check_condition(ide_drive_t *drive, struct request *failed_command) |
250 | { | |
251 | idescsi_scsi_t *scsi = drive_to_idescsi(drive); | |
252 | idescsi_pc_t *pc; | |
253 | struct request *rq; | |
254 | u8 *buf; | |
255 | ||
256 | /* stuff a sense request in front of our current request */ | |
41ead3c9 MK |
257 | pc = kzalloc(sizeof(idescsi_pc_t), GFP_ATOMIC); |
258 | rq = kmalloc(sizeof(struct request), GFP_ATOMIC); | |
259 | buf = kzalloc(SCSI_SENSE_BUFFERSIZE, GFP_ATOMIC); | |
260 | if (!pc || !rq || !buf) { | |
c9475cb0 JJ |
261 | kfree(buf); |
262 | kfree(rq); | |
263 | kfree(pc); | |
1da177e4 LT |
264 | return -ENOMEM; |
265 | } | |
1da177e4 LT |
266 | ide_init_drive_cmd(rq); |
267 | rq->special = (char *) pc; | |
268 | pc->rq = rq; | |
269 | pc->buffer = buf; | |
270 | pc->c[0] = REQUEST_SENSE; | |
271 | pc->c[4] = pc->request_transfer = pc->buffer_size = SCSI_SENSE_BUFFERSIZE; | |
4aff5e23 | 272 | rq->cmd_type = REQ_TYPE_SENSE; |
1da177e4 LT |
273 | pc->timeout = jiffies + WAIT_READY; |
274 | /* NOTE! Save the failed packet command in "rq->buffer" */ | |
275 | rq->buffer = (void *) failed_command->special; | |
276 | pc->scsi_cmd = ((idescsi_pc_t *) failed_command->special)->scsi_cmd; | |
277 | if (test_bit(IDESCSI_LOG_CMD, &scsi->log)) { | |
278 | printk ("ide-scsi: %s: queue cmd = ", drive->name); | |
69ae6fee | 279 | ide_scsi_hex_dump(pc->c, 6); |
1da177e4 LT |
280 | } |
281 | rq->rq_disk = scsi->disk; | |
282 | return ide_do_drive_cmd(drive, rq, ide_preempt); | |
283 | } | |
284 | ||
285 | static int idescsi_end_request(ide_drive_t *, int, int); | |
286 | ||
287 | static ide_startstop_t | |
288 | idescsi_atapi_error(ide_drive_t *drive, struct request *rq, u8 stat, u8 err) | |
289 | { | |
c47137a9 | 290 | if (ide_read_status(drive) & (BUSY_STAT | DRQ_STAT)) |
1da177e4 LT |
291 | /* force an abort */ |
292 | HWIF(drive)->OUTB(WIN_IDLEIMMEDIATE,IDE_COMMAND_REG); | |
293 | ||
294 | rq->errors++; | |
295 | ||
296 | idescsi_end_request(drive, 0, 0); | |
297 | ||
298 | return ide_stopped; | |
299 | } | |
300 | ||
301 | static ide_startstop_t | |
302 | idescsi_atapi_abort(ide_drive_t *drive, struct request *rq) | |
303 | { | |
304 | #if IDESCSI_DEBUG_LOG | |
305 | printk(KERN_WARNING "idescsi_atapi_abort called for %lu\n", | |
306 | ((idescsi_pc_t *) rq->special)->scsi_cmd->serial_number); | |
307 | #endif | |
308 | rq->errors |= ERROR_MAX; | |
309 | ||
310 | idescsi_end_request(drive, 0, 0); | |
311 | ||
312 | return ide_stopped; | |
313 | } | |
314 | ||
315 | static int idescsi_end_request (ide_drive_t *drive, int uptodate, int nrsecs) | |
316 | { | |
317 | idescsi_scsi_t *scsi = drive_to_idescsi(drive); | |
318 | struct request *rq = HWGROUP(drive)->rq; | |
319 | idescsi_pc_t *pc = (idescsi_pc_t *) rq->special; | |
320 | int log = test_bit(IDESCSI_LOG_CMD, &scsi->log); | |
321 | struct Scsi_Host *host; | |
32565347 | 322 | int errors = rq->errors; |
1da177e4 LT |
323 | unsigned long flags; |
324 | ||
4aff5e23 | 325 | if (!blk_special_request(rq) && !blk_sense_request(rq)) { |
1da177e4 LT |
326 | ide_end_request(drive, uptodate, nrsecs); |
327 | return 0; | |
328 | } | |
329 | ide_end_drive_cmd (drive, 0, 0); | |
4aff5e23 | 330 | if (blk_sense_request(rq)) { |
1da177e4 LT |
331 | idescsi_pc_t *opc = (idescsi_pc_t *) rq->buffer; |
332 | if (log) { | |
333 | printk ("ide-scsi: %s: wrap up check %lu, rst = ", drive->name, opc->scsi_cmd->serial_number); | |
69ae6fee | 334 | ide_scsi_hex_dump(pc->buffer, 16); |
1da177e4 LT |
335 | } |
336 | memcpy((void *) opc->scsi_cmd->sense_buffer, pc->buffer, SCSI_SENSE_BUFFERSIZE); | |
337 | kfree(pc->buffer); | |
338 | kfree(pc); | |
339 | kfree(rq); | |
340 | pc = opc; | |
341 | rq = pc->rq; | |
342 | pc->scsi_cmd->result = (CHECK_CONDITION << 1) | | |
343 | ((test_bit(PC_TIMEDOUT, &pc->flags)?DID_TIME_OUT:DID_OK) << 16); | |
344 | } else if (test_bit(PC_TIMEDOUT, &pc->flags)) { | |
345 | if (log) | |
346 | printk (KERN_WARNING "ide-scsi: %s: timed out for %lu\n", | |
347 | drive->name, pc->scsi_cmd->serial_number); | |
348 | pc->scsi_cmd->result = DID_TIME_OUT << 16; | |
32565347 | 349 | } else if (errors >= ERROR_MAX) { |
1da177e4 LT |
350 | pc->scsi_cmd->result = DID_ERROR << 16; |
351 | if (log) | |
352 | printk ("ide-scsi: %s: I/O error for %lu\n", drive->name, pc->scsi_cmd->serial_number); | |
32565347 | 353 | } else if (errors) { |
1da177e4 LT |
354 | if (log) |
355 | printk ("ide-scsi: %s: check condition for %lu\n", drive->name, pc->scsi_cmd->serial_number); | |
356 | if (!idescsi_check_condition(drive, rq)) | |
357 | /* we started a request sense, so we'll be back, exit for now */ | |
358 | return 0; | |
359 | pc->scsi_cmd->result = (CHECK_CONDITION << 1) | (DID_OK << 16); | |
360 | } else { | |
361 | pc->scsi_cmd->result = DID_OK << 16; | |
1da177e4 LT |
362 | } |
363 | host = pc->scsi_cmd->device->host; | |
364 | spin_lock_irqsave(host->host_lock, flags); | |
365 | pc->done(pc->scsi_cmd); | |
366 | spin_unlock_irqrestore(host->host_lock, flags); | |
367 | kfree(pc); | |
368 | kfree(rq); | |
369 | scsi->pc = NULL; | |
370 | return 0; | |
371 | } | |
372 | ||
373 | static inline unsigned long get_timeout(idescsi_pc_t *pc) | |
374 | { | |
375 | return max_t(unsigned long, WAIT_CMD, pc->timeout - jiffies); | |
376 | } | |
377 | ||
378 | static int idescsi_expiry(ide_drive_t *drive) | |
379 | { | |
d1be0a82 | 380 | idescsi_scsi_t *scsi = drive_to_idescsi(drive); |
1da177e4 LT |
381 | idescsi_pc_t *pc = scsi->pc; |
382 | ||
383 | #if IDESCSI_DEBUG_LOG | |
384 | printk(KERN_WARNING "idescsi_expiry called for %lu at %lu\n", pc->scsi_cmd->serial_number, jiffies); | |
385 | #endif | |
386 | set_bit(PC_TIMEDOUT, &pc->flags); | |
387 | ||
388 | return 0; /* we do not want the ide subsystem to retry */ | |
389 | } | |
390 | ||
391 | /* | |
392 | * Our interrupt handler. | |
393 | */ | |
394 | static ide_startstop_t idescsi_pc_intr (ide_drive_t *drive) | |
395 | { | |
396 | idescsi_scsi_t *scsi = drive_to_idescsi(drive); | |
790d1239 BZ |
397 | ide_hwif_t *hwif = drive->hwif; |
398 | idescsi_pc_t *pc = scsi->pc; | |
1da177e4 | 399 | struct request *rq = pc->rq; |
1da177e4 | 400 | unsigned int temp; |
790d1239 | 401 | u16 bcount; |
8e7657ae | 402 | u8 stat, ireason; |
1da177e4 LT |
403 | |
404 | #if IDESCSI_DEBUG_LOG | |
405 | printk (KERN_INFO "ide-scsi: Reached idescsi_pc_intr interrupt handler\n"); | |
406 | #endif /* IDESCSI_DEBUG_LOG */ | |
407 | ||
408 | if (test_bit(PC_TIMEDOUT, &pc->flags)){ | |
409 | #if IDESCSI_DEBUG_LOG | |
410 | printk(KERN_WARNING "idescsi_pc_intr: got timed out packet %lu at %lu\n", | |
411 | pc->scsi_cmd->serial_number, jiffies); | |
412 | #endif | |
413 | /* end this request now - scsi should retry it*/ | |
414 | idescsi_end_request (drive, 1, 0); | |
415 | return ide_stopped; | |
416 | } | |
417 | if (test_and_clear_bit (PC_DMA_IN_PROGRESS, &pc->flags)) { | |
418 | #if IDESCSI_DEBUG_LOG | |
419 | printk ("ide-scsi: %s: DMA complete\n", drive->name); | |
420 | #endif /* IDESCSI_DEBUG_LOG */ | |
421 | pc->actually_transferred=pc->request_transfer; | |
422 | (void) HWIF(drive)->ide_dma_end(drive); | |
423 | } | |
424 | ||
1da177e4 | 425 | /* Clear the interrupt */ |
c47137a9 | 426 | stat = ide_read_status(drive); |
1da177e4 | 427 | |
22c525b9 | 428 | if ((stat & DRQ_STAT) == 0) { |
1da177e4 LT |
429 | /* No more interrupts */ |
430 | if (test_bit(IDESCSI_LOG_CMD, &scsi->log)) | |
431 | printk (KERN_INFO "Packet command completed, %d bytes transferred\n", pc->actually_transferred); | |
36e8e578 | 432 | local_irq_enable_in_hardirq(); |
22c525b9 | 433 | if (stat & ERR_STAT) |
1da177e4 LT |
434 | rq->errors++; |
435 | idescsi_end_request (drive, 1, 0); | |
436 | return ide_stopped; | |
437 | } | |
790d1239 BZ |
438 | bcount = (hwif->INB(IDE_BCOUNTH_REG) << 8) | |
439 | hwif->INB(IDE_BCOUNTL_REG); | |
8e7657ae | 440 | ireason = hwif->INB(IDE_IREASON_REG); |
1da177e4 | 441 | |
8e7657ae | 442 | if (ireason & CD) { |
1da177e4 LT |
443 | printk(KERN_ERR "ide-scsi: CoD != 0 in idescsi_pc_intr\n"); |
444 | return ide_do_reset (drive); | |
445 | } | |
8e7657ae | 446 | if (ireason & IO) { |
790d1239 | 447 | temp = pc->actually_transferred + bcount; |
1da177e4 LT |
448 | if (temp > pc->request_transfer) { |
449 | if (temp > pc->buffer_size) { | |
450 | printk(KERN_ERR "ide-scsi: The scsi wants to " | |
451 | "send us more data than expected " | |
452 | "- discarding data\n"); | |
453 | temp = pc->buffer_size - pc->actually_transferred; | |
454 | if (temp) { | |
455 | clear_bit(PC_WRITING, &pc->flags); | |
456 | if (pc->sg) | |
457 | idescsi_input_buffers(drive, pc, temp); | |
458 | else | |
459 | drive->hwif->atapi_input_bytes(drive, pc->current_position, temp); | |
790d1239 BZ |
460 | printk(KERN_ERR "ide-scsi: transferred" |
461 | " %d of %d bytes\n", | |
462 | temp, bcount); | |
1da177e4 LT |
463 | } |
464 | pc->actually_transferred += temp; | |
465 | pc->current_position += temp; | |
790d1239 | 466 | idescsi_discard_data(drive, bcount - temp); |
1da177e4 LT |
467 | ide_set_handler(drive, &idescsi_pc_intr, get_timeout(pc), idescsi_expiry); |
468 | return ide_started; | |
469 | } | |
470 | #if IDESCSI_DEBUG_LOG | |
471 | printk (KERN_NOTICE "ide-scsi: The scsi wants to send us more data than expected - allowing transfer\n"); | |
472 | #endif /* IDESCSI_DEBUG_LOG */ | |
473 | } | |
474 | } | |
8e7657ae | 475 | if (ireason & IO) { |
1da177e4 LT |
476 | clear_bit(PC_WRITING, &pc->flags); |
477 | if (pc->sg) | |
790d1239 | 478 | idescsi_input_buffers(drive, pc, bcount); |
1da177e4 | 479 | else |
790d1239 BZ |
480 | hwif->atapi_input_bytes(drive, pc->current_position, |
481 | bcount); | |
1da177e4 LT |
482 | } else { |
483 | set_bit(PC_WRITING, &pc->flags); | |
484 | if (pc->sg) | |
790d1239 | 485 | idescsi_output_buffers(drive, pc, bcount); |
1da177e4 | 486 | else |
790d1239 BZ |
487 | hwif->atapi_output_bytes(drive, pc->current_position, |
488 | bcount); | |
1da177e4 LT |
489 | } |
490 | /* Update the current position */ | |
790d1239 BZ |
491 | pc->actually_transferred += bcount; |
492 | pc->current_position += bcount; | |
1da177e4 LT |
493 | |
494 | /* And set the interrupt handler again */ | |
495 | ide_set_handler(drive, &idescsi_pc_intr, get_timeout(pc), idescsi_expiry); | |
496 | return ide_started; | |
497 | } | |
498 | ||
499 | static ide_startstop_t idescsi_transfer_pc(ide_drive_t *drive) | |
500 | { | |
501 | ide_hwif_t *hwif = drive->hwif; | |
502 | idescsi_scsi_t *scsi = drive_to_idescsi(drive); | |
503 | idescsi_pc_t *pc = scsi->pc; | |
1da177e4 | 504 | ide_startstop_t startstop; |
8e7657ae | 505 | u8 ireason; |
1da177e4 LT |
506 | |
507 | if (ide_wait_stat(&startstop,drive,DRQ_STAT,BUSY_STAT,WAIT_READY)) { | |
508 | printk(KERN_ERR "ide-scsi: Strange, packet command " | |
509 | "initiated yet DRQ isn't asserted\n"); | |
510 | return startstop; | |
511 | } | |
8e7657ae BZ |
512 | ireason = hwif->INB(IDE_IREASON_REG); |
513 | if ((ireason & CD) == 0 || (ireason & IO)) { | |
1da177e4 LT |
514 | printk(KERN_ERR "ide-scsi: (IO,CoD) != (0,1) while " |
515 | "issuing a packet command\n"); | |
516 | return ide_do_reset (drive); | |
517 | } | |
125e1874 | 518 | BUG_ON(HWGROUP(drive)->handler != NULL); |
1da177e4 LT |
519 | /* Set the interrupt routine */ |
520 | ide_set_handler(drive, &idescsi_pc_intr, get_timeout(pc), idescsi_expiry); | |
521 | /* Send the actual packet */ | |
522 | drive->hwif->atapi_output_bytes(drive, scsi->pc->c, 12); | |
523 | if (test_bit (PC_DMA_OK, &pc->flags)) { | |
524 | set_bit (PC_DMA_IN_PROGRESS, &pc->flags); | |
525 | hwif->dma_start(drive); | |
526 | } | |
527 | return ide_started; | |
528 | } | |
529 | ||
530 | static inline int idescsi_set_direction(idescsi_pc_t *pc) | |
531 | { | |
532 | switch (pc->c[0]) { | |
533 | case READ_6: case READ_10: case READ_12: | |
534 | clear_bit(PC_WRITING, &pc->flags); | |
535 | return 0; | |
536 | case WRITE_6: case WRITE_10: case WRITE_12: | |
537 | set_bit(PC_WRITING, &pc->flags); | |
538 | return 0; | |
539 | default: | |
540 | return 1; | |
541 | } | |
542 | } | |
543 | ||
544 | static int idescsi_map_sg(ide_drive_t *drive, idescsi_pc_t *pc) | |
545 | { | |
546 | ide_hwif_t *hwif = drive->hwif; | |
547 | struct scatterlist *sg, *scsi_sg; | |
548 | int segments; | |
549 | ||
550 | if (!pc->request_transfer || pc->request_transfer % 1024) | |
551 | return 1; | |
552 | ||
553 | if (idescsi_set_direction(pc)) | |
554 | return 1; | |
555 | ||
556 | sg = hwif->sg_table; | |
427d0bd4 BH |
557 | scsi_sg = scsi_sglist(pc->scsi_cmd); |
558 | segments = scsi_sg_count(pc->scsi_cmd); | |
1da177e4 LT |
559 | |
560 | if (segments > hwif->sg_max_nents) | |
561 | return 1; | |
562 | ||
427d0bd4 BH |
563 | hwif->sg_nents = segments; |
564 | memcpy(sg, scsi_sg, sizeof(*sg) * segments); | |
1da177e4 LT |
565 | |
566 | return 0; | |
567 | } | |
568 | ||
569 | /* | |
570 | * Issue a packet command | |
571 | */ | |
572 | static ide_startstop_t idescsi_issue_pc (ide_drive_t *drive, idescsi_pc_t *pc) | |
573 | { | |
574 | idescsi_scsi_t *scsi = drive_to_idescsi(drive); | |
575 | ide_hwif_t *hwif = drive->hwif; | |
790d1239 | 576 | u16 bcount; |
e5f9f5a8 | 577 | u8 dma = 0; |
1da177e4 LT |
578 | |
579 | scsi->pc=pc; /* Set the current packet command */ | |
580 | pc->actually_transferred=0; /* We haven't transferred any data yet */ | |
581 | pc->current_position=pc->buffer; | |
790d1239 BZ |
582 | /* Request to transfer the entire buffer at once */ |
583 | bcount = min(pc->request_transfer, 63 * 1024); | |
1da177e4 | 584 | |
1da177e4 LT |
585 | if (drive->using_dma && !idescsi_map_sg(drive, pc)) { |
586 | hwif->sg_mapped = 1; | |
e5f9f5a8 | 587 | dma = !hwif->dma_setup(drive); |
1da177e4 LT |
588 | hwif->sg_mapped = 0; |
589 | } | |
590 | ||
2fc57388 | 591 | ide_pktcmd_tf_load(drive, IDE_TFLAG_NO_SELECT_MASK, bcount, dma); |
1da177e4 | 592 | |
e5f9f5a8 | 593 | if (dma) |
1da177e4 LT |
594 | set_bit(PC_DMA_OK, &pc->flags); |
595 | ||
596 | if (test_bit(IDESCSI_DRQ_INTERRUPT, &scsi->flags)) { | |
2d6027f0 BZ |
597 | ide_execute_command(drive, WIN_PACKETCMD, &idescsi_transfer_pc, |
598 | get_timeout(pc), idescsi_expiry); | |
1da177e4 LT |
599 | return ide_started; |
600 | } else { | |
601 | /* Issue the packet command */ | |
602 | HWIF(drive)->OUTB(WIN_PACKETCMD, IDE_COMMAND_REG); | |
603 | return idescsi_transfer_pc(drive); | |
604 | } | |
605 | } | |
606 | ||
607 | /* | |
608 | * idescsi_do_request is our request handling function. | |
609 | */ | |
610 | static ide_startstop_t idescsi_do_request (ide_drive_t *drive, struct request *rq, sector_t block) | |
611 | { | |
612 | #if IDESCSI_DEBUG_LOG | |
cdd60262 | 613 | printk (KERN_INFO "dev: %s, cmd: %x, errors: %d\n", rq->rq_disk->disk_name,rq->cmd[0],rq->errors); |
1da177e4 LT |
614 | printk (KERN_INFO "sector: %ld, nr_sectors: %ld, current_nr_sectors: %d\n",rq->sector,rq->nr_sectors,rq->current_nr_sectors); |
615 | #endif /* IDESCSI_DEBUG_LOG */ | |
616 | ||
4aff5e23 | 617 | if (blk_sense_request(rq) || blk_special_request(rq)) { |
1da177e4 LT |
618 | return idescsi_issue_pc (drive, (idescsi_pc_t *) rq->special); |
619 | } | |
620 | blk_dump_rq_flags(rq, "ide-scsi: unsup command"); | |
621 | idescsi_end_request (drive, 0, 0); | |
622 | return ide_stopped; | |
623 | } | |
624 | ||
7662d046 | 625 | #ifdef CONFIG_IDE_PROC_FS |
1da177e4 LT |
626 | static void idescsi_add_settings(ide_drive_t *drive) |
627 | { | |
628 | idescsi_scsi_t *scsi = drive_to_idescsi(drive); | |
629 | ||
630 | /* | |
1497943e | 631 | * drive setting name read/write data type min max mul_factor div_factor data pointer set function |
1da177e4 | 632 | */ |
1497943e BZ |
633 | ide_add_setting(drive, "bios_cyl", SETTING_RW, TYPE_INT, 0, 1023, 1, 1, &drive->bios_cyl, NULL); |
634 | ide_add_setting(drive, "bios_head", SETTING_RW, TYPE_BYTE, 0, 255, 1, 1, &drive->bios_head, NULL); | |
635 | ide_add_setting(drive, "bios_sect", SETTING_RW, TYPE_BYTE, 0, 63, 1, 1, &drive->bios_sect, NULL); | |
636 | ide_add_setting(drive, "transform", SETTING_RW, TYPE_INT, 0, 3, 1, 1, &scsi->transform, NULL); | |
637 | ide_add_setting(drive, "log", SETTING_RW, TYPE_INT, 0, 1, 1, 1, &scsi->log, NULL); | |
1da177e4 | 638 | } |
7662d046 BZ |
639 | #else |
640 | static inline void idescsi_add_settings(ide_drive_t *drive) { ; } | |
641 | #endif | |
1da177e4 LT |
642 | |
643 | /* | |
644 | * Driver initialization. | |
645 | */ | |
646 | static void idescsi_setup (ide_drive_t *drive, idescsi_scsi_t *scsi) | |
647 | { | |
1da177e4 LT |
648 | if (drive->id && (drive->id->config & 0x0060) == 0x20) |
649 | set_bit (IDESCSI_DRQ_INTERRUPT, &scsi->flags); | |
1da177e4 LT |
650 | clear_bit(IDESCSI_SG_TRANSFORM, &scsi->transform); |
651 | #if IDESCSI_DEBUG_LOG | |
652 | set_bit(IDESCSI_LOG_CMD, &scsi->log); | |
653 | #endif /* IDESCSI_DEBUG_LOG */ | |
654 | idescsi_add_settings(drive); | |
1da177e4 LT |
655 | } |
656 | ||
b62735d9 | 657 | static void ide_scsi_remove(ide_drive_t *drive) |
1da177e4 LT |
658 | { |
659 | struct Scsi_Host *scsihost = drive->driver_data; | |
660 | struct ide_scsi_obj *scsi = scsihost_to_idescsi(scsihost); | |
661 | struct gendisk *g = scsi->disk; | |
662 | ||
6fdea8db | 663 | scsi_remove_host(scsihost); |
7662d046 | 664 | ide_proc_unregister_driver(drive, scsi->driver); |
1da177e4 LT |
665 | |
666 | ide_unregister_region(g); | |
667 | ||
668 | drive->driver_data = NULL; | |
669 | g->private_data = NULL; | |
670 | put_disk(g); | |
671 | ||
1da177e4 | 672 | ide_scsi_put(scsi); |
1da177e4 LT |
673 | } |
674 | ||
b62735d9 | 675 | static int ide_scsi_probe(ide_drive_t *); |
1da177e4 | 676 | |
ecfd80e4 | 677 | #ifdef CONFIG_IDE_PROC_FS |
1da177e4 LT |
678 | static ide_proc_entry_t idescsi_proc[] = { |
679 | { "capacity", S_IFREG|S_IRUGO, proc_ide_read_capacity, NULL }, | |
680 | { NULL, 0, NULL, NULL } | |
681 | }; | |
1da177e4 LT |
682 | #endif |
683 | ||
1da177e4 | 684 | static ide_driver_t idescsi_driver = { |
8604affd | 685 | .gen_driver = { |
4ef3b8f4 | 686 | .owner = THIS_MODULE, |
8604affd BZ |
687 | .name = "ide-scsi", |
688 | .bus = &ide_bus_type, | |
8604affd | 689 | }, |
b62735d9 MP |
690 | .probe = ide_scsi_probe, |
691 | .remove = ide_scsi_remove, | |
1da177e4 LT |
692 | .version = IDESCSI_VERSION, |
693 | .media = ide_scsi, | |
1da177e4 | 694 | .supports_dsc_overlap = 0, |
1da177e4 LT |
695 | .do_request = idescsi_do_request, |
696 | .end_request = idescsi_end_request, | |
697 | .error = idescsi_atapi_error, | |
698 | .abort = idescsi_atapi_abort, | |
7662d046 BZ |
699 | #ifdef CONFIG_IDE_PROC_FS |
700 | .proc = idescsi_proc, | |
701 | #endif | |
1da177e4 LT |
702 | }; |
703 | ||
704 | static int idescsi_ide_open(struct inode *inode, struct file *filp) | |
705 | { | |
706 | struct gendisk *disk = inode->i_bdev->bd_disk; | |
707 | struct ide_scsi_obj *scsi; | |
1da177e4 LT |
708 | |
709 | if (!(scsi = ide_scsi_get(disk))) | |
710 | return -ENXIO; | |
711 | ||
1da177e4 LT |
712 | return 0; |
713 | } | |
714 | ||
715 | static int idescsi_ide_release(struct inode *inode, struct file *filp) | |
716 | { | |
717 | struct gendisk *disk = inode->i_bdev->bd_disk; | |
718 | struct ide_scsi_obj *scsi = ide_scsi_g(disk); | |
1da177e4 LT |
719 | |
720 | ide_scsi_put(scsi); | |
721 | ||
722 | return 0; | |
723 | } | |
724 | ||
725 | static int idescsi_ide_ioctl(struct inode *inode, struct file *file, | |
726 | unsigned int cmd, unsigned long arg) | |
727 | { | |
728 | struct block_device *bdev = inode->i_bdev; | |
729 | struct ide_scsi_obj *scsi = ide_scsi_g(bdev->bd_disk); | |
730 | return generic_ide_ioctl(scsi->drive, file, bdev, cmd, arg); | |
731 | } | |
732 | ||
733 | static struct block_device_operations idescsi_ops = { | |
734 | .owner = THIS_MODULE, | |
735 | .open = idescsi_ide_open, | |
736 | .release = idescsi_ide_release, | |
737 | .ioctl = idescsi_ide_ioctl, | |
738 | }; | |
739 | ||
1da177e4 LT |
740 | static int idescsi_slave_configure(struct scsi_device * sdp) |
741 | { | |
742 | /* Configure detected device */ | |
427d0bd4 BH |
743 | sdp->use_10_for_rw = 1; |
744 | sdp->use_10_for_ms = 1; | |
1da177e4 LT |
745 | scsi_adjust_queue_depth(sdp, MSG_SIMPLE_TAG, sdp->host->cmd_per_lun); |
746 | return 0; | |
747 | } | |
748 | ||
749 | static const char *idescsi_info (struct Scsi_Host *host) | |
750 | { | |
751 | return "SCSI host adapter emulation for IDE ATAPI devices"; | |
752 | } | |
753 | ||
754 | static int idescsi_ioctl (struct scsi_device *dev, int cmd, void __user *arg) | |
755 | { | |
756 | idescsi_scsi_t *scsi = scsihost_to_idescsi(dev->host); | |
757 | ||
758 | if (cmd == SG_SET_TRANSFORM) { | |
759 | if (arg) | |
760 | set_bit(IDESCSI_SG_TRANSFORM, &scsi->transform); | |
761 | else | |
762 | clear_bit(IDESCSI_SG_TRANSFORM, &scsi->transform); | |
763 | return 0; | |
764 | } else if (cmd == SG_GET_TRANSFORM) | |
765 | return put_user(test_bit(IDESCSI_SG_TRANSFORM, &scsi->transform), (int __user *) arg); | |
766 | return -EINVAL; | |
767 | } | |
768 | ||
1da177e4 LT |
769 | static int idescsi_queue (struct scsi_cmnd *cmd, |
770 | void (*done)(struct scsi_cmnd *)) | |
771 | { | |
772 | struct Scsi_Host *host = cmd->device->host; | |
773 | idescsi_scsi_t *scsi = scsihost_to_idescsi(host); | |
774 | ide_drive_t *drive = scsi->drive; | |
775 | struct request *rq = NULL; | |
776 | idescsi_pc_t *pc = NULL; | |
777 | ||
778 | if (!drive) { | |
017560fc | 779 | scmd_printk (KERN_ERR, cmd, "drive not present\n"); |
1da177e4 LT |
780 | goto abort; |
781 | } | |
782 | scsi = drive_to_idescsi(drive); | |
783 | pc = kmalloc (sizeof (idescsi_pc_t), GFP_ATOMIC); | |
784 | rq = kmalloc (sizeof (struct request), GFP_ATOMIC); | |
785 | if (rq == NULL || pc == NULL) { | |
786 | printk (KERN_ERR "ide-scsi: %s: out of memory\n", drive->name); | |
787 | goto abort; | |
788 | } | |
789 | ||
790 | memset (pc->c, 0, 12); | |
791 | pc->flags = 0; | |
792 | pc->rq = rq; | |
793 | memcpy (pc->c, cmd->cmnd, cmd->cmd_len); | |
427d0bd4 BH |
794 | pc->buffer = NULL; |
795 | pc->sg = scsi_sglist(cmd); | |
c79d88b7 | 796 | pc->sg_cnt = scsi_sg_count(cmd); |
1da177e4 | 797 | pc->b_count = 0; |
427d0bd4 | 798 | pc->request_transfer = pc->buffer_size = scsi_bufflen(cmd); |
1da177e4 LT |
799 | pc->scsi_cmd = cmd; |
800 | pc->done = done; | |
801 | pc->timeout = jiffies + cmd->timeout_per_command; | |
802 | ||
1da177e4 LT |
803 | if (test_bit(IDESCSI_LOG_CMD, &scsi->log)) { |
804 | printk ("ide-scsi: %s: que %lu, cmd = ", drive->name, cmd->serial_number); | |
69ae6fee | 805 | ide_scsi_hex_dump(cmd->cmnd, cmd->cmd_len); |
1da177e4 LT |
806 | if (memcmp(pc->c, cmd->cmnd, cmd->cmd_len)) { |
807 | printk ("ide-scsi: %s: que %lu, tsl = ", drive->name, cmd->serial_number); | |
69ae6fee | 808 | ide_scsi_hex_dump(pc->c, 12); |
1da177e4 LT |
809 | } |
810 | } | |
811 | ||
812 | ide_init_drive_cmd (rq); | |
813 | rq->special = (char *) pc; | |
4aff5e23 | 814 | rq->cmd_type = REQ_TYPE_SPECIAL; |
1da177e4 LT |
815 | spin_unlock_irq(host->host_lock); |
816 | rq->rq_disk = scsi->disk; | |
817 | (void) ide_do_drive_cmd (drive, rq, ide_end); | |
818 | spin_lock_irq(host->host_lock); | |
819 | return 0; | |
820 | abort: | |
c9475cb0 JJ |
821 | kfree (pc); |
822 | kfree (rq); | |
1da177e4 LT |
823 | cmd->result = DID_ERROR << 16; |
824 | done(cmd); | |
825 | return 0; | |
826 | } | |
827 | ||
828 | static int idescsi_eh_abort (struct scsi_cmnd *cmd) | |
829 | { | |
830 | idescsi_scsi_t *scsi = scsihost_to_idescsi(cmd->device->host); | |
831 | ide_drive_t *drive = scsi->drive; | |
832 | int busy; | |
833 | int ret = FAILED; | |
834 | ||
835 | /* In idescsi_eh_abort we try to gently pry our command from the ide subsystem */ | |
836 | ||
837 | if (test_bit(IDESCSI_LOG_CMD, &scsi->log)) | |
838 | printk (KERN_WARNING "ide-scsi: abort called for %lu\n", cmd->serial_number); | |
839 | ||
840 | if (!drive) { | |
841 | printk (KERN_WARNING "ide-scsi: Drive not set in idescsi_eh_abort\n"); | |
842 | WARN_ON(1); | |
843 | goto no_drive; | |
844 | } | |
845 | ||
846 | /* First give it some more time, how much is "right" is hard to say :-( */ | |
847 | ||
848 | busy = ide_wait_not_busy(HWIF(drive), 100); /* FIXME - uses mdelay which causes latency? */ | |
849 | if (test_bit(IDESCSI_LOG_CMD, &scsi->log)) | |
850 | printk (KERN_WARNING "ide-scsi: drive did%s become ready\n", busy?" not":""); | |
851 | ||
852 | spin_lock_irq(&ide_lock); | |
853 | ||
854 | /* If there is no pc running we're done (our interrupt took care of it) */ | |
855 | if (!scsi->pc) { | |
856 | ret = SUCCESS; | |
857 | goto ide_unlock; | |
858 | } | |
859 | ||
860 | /* It's somewhere in flight. Does ide subsystem agree? */ | |
861 | if (scsi->pc->scsi_cmd->serial_number == cmd->serial_number && !busy && | |
862 | elv_queue_empty(drive->queue) && HWGROUP(drive)->rq != scsi->pc->rq) { | |
863 | /* | |
864 | * FIXME - not sure this condition can ever occur | |
865 | */ | |
866 | printk (KERN_ERR "ide-scsi: cmd aborted!\n"); | |
867 | ||
4aff5e23 | 868 | if (blk_sense_request(scsi->pc->rq)) |
1da177e4 LT |
869 | kfree(scsi->pc->buffer); |
870 | kfree(scsi->pc->rq); | |
871 | kfree(scsi->pc); | |
872 | scsi->pc = NULL; | |
873 | ||
874 | ret = SUCCESS; | |
875 | } | |
876 | ||
877 | ide_unlock: | |
878 | spin_unlock_irq(&ide_lock); | |
879 | no_drive: | |
880 | if (test_bit(IDESCSI_LOG_CMD, &scsi->log)) | |
881 | printk (KERN_WARNING "ide-scsi: abort returns %s\n", ret == SUCCESS?"success":"failed"); | |
882 | ||
883 | return ret; | |
884 | } | |
885 | ||
886 | static int idescsi_eh_reset (struct scsi_cmnd *cmd) | |
887 | { | |
888 | struct request *req; | |
889 | idescsi_scsi_t *scsi = scsihost_to_idescsi(cmd->device->host); | |
890 | ide_drive_t *drive = scsi->drive; | |
891 | int ready = 0; | |
892 | int ret = SUCCESS; | |
893 | ||
894 | /* In idescsi_eh_reset we forcefully remove the command from the ide subsystem and reset the device. */ | |
895 | ||
896 | if (test_bit(IDESCSI_LOG_CMD, &scsi->log)) | |
897 | printk (KERN_WARNING "ide-scsi: reset called for %lu\n", cmd->serial_number); | |
898 | ||
899 | if (!drive) { | |
900 | printk (KERN_WARNING "ide-scsi: Drive not set in idescsi_eh_reset\n"); | |
901 | WARN_ON(1); | |
902 | return FAILED; | |
903 | } | |
904 | ||
df0ae249 JG |
905 | spin_lock_irq(cmd->device->host->host_lock); |
906 | spin_lock(&ide_lock); | |
1da177e4 LT |
907 | |
908 | if (!scsi->pc || (req = scsi->pc->rq) != HWGROUP(drive)->rq || !HWGROUP(drive)->handler) { | |
909 | printk (KERN_WARNING "ide-scsi: No active request in idescsi_eh_reset\n"); | |
910 | spin_unlock(&ide_lock); | |
df0ae249 | 911 | spin_unlock_irq(cmd->device->host->host_lock); |
1da177e4 LT |
912 | return FAILED; |
913 | } | |
914 | ||
915 | /* kill current request */ | |
5a330e39 KU |
916 | if (__blk_end_request(req, -EIO, 0)) |
917 | BUG(); | |
4aff5e23 | 918 | if (blk_sense_request(req)) |
1da177e4 LT |
919 | kfree(scsi->pc->buffer); |
920 | kfree(scsi->pc); | |
921 | scsi->pc = NULL; | |
922 | kfree(req); | |
923 | ||
924 | /* now nuke the drive queue */ | |
925 | while ((req = elv_next_request(drive->queue))) { | |
5a330e39 KU |
926 | if (__blk_end_request(req, -EIO, 0)) |
927 | BUG(); | |
1da177e4 LT |
928 | } |
929 | ||
930 | HWGROUP(drive)->rq = NULL; | |
931 | HWGROUP(drive)->handler = NULL; | |
932 | HWGROUP(drive)->busy = 1; /* will set this to zero when ide reset finished */ | |
df0ae249 | 933 | spin_unlock(&ide_lock); |
1da177e4 LT |
934 | |
935 | ide_do_reset(drive); | |
936 | ||
937 | /* ide_do_reset starts a polling handler which restarts itself every 50ms until the reset finishes */ | |
938 | ||
939 | do { | |
1da177e4 | 940 | spin_unlock_irq(cmd->device->host->host_lock); |
df0ae249 | 941 | msleep(50); |
1da177e4 LT |
942 | spin_lock_irq(cmd->device->host->host_lock); |
943 | } while ( HWGROUP(drive)->handler ); | |
944 | ||
945 | ready = drive_is_ready(drive); | |
946 | HWGROUP(drive)->busy--; | |
947 | if (!ready) { | |
948 | printk (KERN_ERR "ide-scsi: reset failed!\n"); | |
949 | ret = FAILED; | |
950 | } | |
951 | ||
df0ae249 | 952 | spin_unlock_irq(cmd->device->host->host_lock); |
1da177e4 LT |
953 | return ret; |
954 | } | |
955 | ||
956 | static int idescsi_bios(struct scsi_device *sdev, struct block_device *bdev, | |
957 | sector_t capacity, int *parm) | |
958 | { | |
959 | idescsi_scsi_t *idescsi = scsihost_to_idescsi(sdev->host); | |
960 | ide_drive_t *drive = idescsi->drive; | |
961 | ||
962 | if (drive->bios_cyl && drive->bios_head && drive->bios_sect) { | |
963 | parm[0] = drive->bios_head; | |
964 | parm[1] = drive->bios_sect; | |
965 | parm[2] = drive->bios_cyl; | |
966 | } | |
967 | return 0; | |
968 | } | |
969 | ||
970 | static struct scsi_host_template idescsi_template = { | |
971 | .module = THIS_MODULE, | |
972 | .name = "idescsi", | |
973 | .info = idescsi_info, | |
974 | .slave_configure = idescsi_slave_configure, | |
975 | .ioctl = idescsi_ioctl, | |
976 | .queuecommand = idescsi_queue, | |
977 | .eh_abort_handler = idescsi_eh_abort, | |
978 | .eh_host_reset_handler = idescsi_eh_reset, | |
979 | .bios_param = idescsi_bios, | |
980 | .can_queue = 40, | |
981 | .this_id = -1, | |
982 | .sg_tablesize = 256, | |
983 | .cmd_per_lun = 5, | |
984 | .max_sectors = 128, | |
985 | .use_clustering = DISABLE_CLUSTERING, | |
986 | .emulated = 1, | |
987 | .proc_name = "ide-scsi", | |
988 | }; | |
989 | ||
b62735d9 | 990 | static int ide_scsi_probe(ide_drive_t *drive) |
1da177e4 LT |
991 | { |
992 | idescsi_scsi_t *idescsi; | |
993 | struct Scsi_Host *host; | |
994 | struct gendisk *g; | |
995 | static int warned; | |
996 | int err = -ENOMEM; | |
997 | ||
998 | if (!warned && drive->media == ide_cdrom) { | |
999 | printk(KERN_WARNING "ide-scsi is deprecated for cd burning! Use ide-cd and give dev=/dev/hdX as device\n"); | |
1000 | warned = 1; | |
1001 | } | |
1002 | ||
aaeab80b AC |
1003 | if (idescsi_nocd && drive->media == ide_cdrom) |
1004 | return -ENODEV; | |
1005 | ||
1da177e4 LT |
1006 | if (!strstr("ide-scsi", drive->driver_req) || |
1007 | !drive->present || | |
1008 | drive->media == ide_disk || | |
1009 | !(host = scsi_host_alloc(&idescsi_template,sizeof(idescsi_scsi_t)))) | |
8604affd | 1010 | return -ENODEV; |
1da177e4 LT |
1011 | |
1012 | g = alloc_disk(1 << PARTN_BITS); | |
1013 | if (!g) | |
1014 | goto out_host_put; | |
1015 | ||
1016 | ide_init_disk(g, drive); | |
1017 | ||
1018 | host->max_id = 1; | |
1019 | ||
1020 | #if IDESCSI_DEBUG_LOG | |
1021 | if (drive->id->last_lun) | |
1022 | printk(KERN_NOTICE "%s: id->last_lun=%u\n", drive->name, drive->id->last_lun); | |
1023 | #endif | |
1024 | if ((drive->id->last_lun & 0x7) != 7) | |
1025 | host->max_lun = (drive->id->last_lun & 0x7) + 1; | |
1026 | else | |
1027 | host->max_lun = 1; | |
1028 | ||
1029 | drive->driver_data = host; | |
1030 | idescsi = scsihost_to_idescsi(host); | |
1031 | idescsi->drive = drive; | |
1032 | idescsi->driver = &idescsi_driver; | |
1033 | idescsi->host = host; | |
1034 | idescsi->disk = g; | |
1035 | g->private_data = &idescsi->driver; | |
7662d046 | 1036 | ide_proc_register_driver(drive, &idescsi_driver); |
8604affd BZ |
1037 | err = 0; |
1038 | idescsi_setup(drive, idescsi); | |
1039 | g->fops = &idescsi_ops; | |
1040 | ide_register_region(g); | |
1041 | err = scsi_add_host(host, &drive->gendev); | |
1da177e4 | 1042 | if (!err) { |
8604affd BZ |
1043 | scsi_scan_host(host); |
1044 | return 0; | |
1da177e4 | 1045 | } |
8604affd BZ |
1046 | /* fall through on error */ |
1047 | ide_unregister_region(g); | |
7662d046 | 1048 | ide_proc_unregister_driver(drive, &idescsi_driver); |
1da177e4 LT |
1049 | |
1050 | put_disk(g); | |
1051 | out_host_put: | |
1052 | scsi_host_put(host); | |
1053 | return err; | |
1054 | } | |
1055 | ||
1056 | static int __init init_idescsi_module(void) | |
1057 | { | |
8604affd | 1058 | return driver_register(&idescsi_driver.gen_driver); |
1da177e4 LT |
1059 | } |
1060 | ||
1061 | static void __exit exit_idescsi_module(void) | |
1062 | { | |
8604affd | 1063 | driver_unregister(&idescsi_driver.gen_driver); |
1da177e4 LT |
1064 | } |
1065 | ||
aaeab80b AC |
1066 | module_param(idescsi_nocd, int, 0600); |
1067 | MODULE_PARM_DESC(idescsi_nocd, "Disable handling of CD-ROMs so they may be driven by ide-cd"); | |
1da177e4 LT |
1068 | module_init(init_idescsi_module); |
1069 | module_exit(exit_idescsi_module); | |
1070 | MODULE_LICENSE("GPL"); |