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 | ||
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 | } | |
124cafc5 | 231 | blk_rq_init(NULL, rq); |
1da177e4 LT |
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; |
e8a96aa7 | 238 | rq->cmd_flags |= REQ_PREEMPT; |
1da177e4 LT |
239 | pc->timeout = jiffies + WAIT_READY; |
240 | /* NOTE! Save the failed packet command in "rq->buffer" */ | |
1c065787 BP |
241 | rq->buffer = (void *) failed_cmd->special; |
242 | pc->scsi_cmd = ((struct ide_atapi_pc *) failed_cmd->special)->scsi_cmd; | |
1da177e4 LT |
243 | if (test_bit(IDESCSI_LOG_CMD, &scsi->log)) { |
244 | printk ("ide-scsi: %s: queue cmd = ", drive->name); | |
69ae6fee | 245 | ide_scsi_hex_dump(pc->c, 6); |
1da177e4 LT |
246 | } |
247 | rq->rq_disk = scsi->disk; | |
248 | return ide_do_drive_cmd(drive, rq, ide_preempt); | |
249 | } | |
250 | ||
251 | static int idescsi_end_request(ide_drive_t *, int, int); | |
252 | ||
253 | static ide_startstop_t | |
254 | idescsi_atapi_error(ide_drive_t *drive, struct request *rq, u8 stat, u8 err) | |
255 | { | |
23579a2a BZ |
256 | ide_hwif_t *hwif = drive->hwif; |
257 | ||
c47137a9 | 258 | if (ide_read_status(drive) & (BUSY_STAT | DRQ_STAT)) |
1da177e4 | 259 | /* force an abort */ |
32b3fe4f BZ |
260 | hwif->OUTBSYNC(drive, WIN_IDLEIMMEDIATE, |
261 | hwif->io_ports.command_addr); | |
1da177e4 LT |
262 | |
263 | rq->errors++; | |
264 | ||
265 | idescsi_end_request(drive, 0, 0); | |
266 | ||
267 | return ide_stopped; | |
268 | } | |
269 | ||
270 | static ide_startstop_t | |
271 | idescsi_atapi_abort(ide_drive_t *drive, struct request *rq) | |
272 | { | |
273 | #if IDESCSI_DEBUG_LOG | |
274 | printk(KERN_WARNING "idescsi_atapi_abort called for %lu\n", | |
1c065787 | 275 | ((struct ide_atapi_pc *) rq->special)->scsi_cmd->serial_number); |
1da177e4 LT |
276 | #endif |
277 | rq->errors |= ERROR_MAX; | |
278 | ||
279 | idescsi_end_request(drive, 0, 0); | |
280 | ||
281 | return ide_stopped; | |
282 | } | |
283 | ||
284 | static int idescsi_end_request (ide_drive_t *drive, int uptodate, int nrsecs) | |
285 | { | |
286 | idescsi_scsi_t *scsi = drive_to_idescsi(drive); | |
287 | struct request *rq = HWGROUP(drive)->rq; | |
1c065787 | 288 | struct ide_atapi_pc *pc = (struct ide_atapi_pc *) rq->special; |
1da177e4 LT |
289 | int log = test_bit(IDESCSI_LOG_CMD, &scsi->log); |
290 | struct Scsi_Host *host; | |
32565347 | 291 | int errors = rq->errors; |
1da177e4 LT |
292 | unsigned long flags; |
293 | ||
4aff5e23 | 294 | if (!blk_special_request(rq) && !blk_sense_request(rq)) { |
1da177e4 LT |
295 | ide_end_request(drive, uptodate, nrsecs); |
296 | return 0; | |
297 | } | |
298 | ide_end_drive_cmd (drive, 0, 0); | |
4aff5e23 | 299 | if (blk_sense_request(rq)) { |
1c065787 | 300 | struct ide_atapi_pc *opc = (struct ide_atapi_pc *) rq->buffer; |
1da177e4 LT |
301 | if (log) { |
302 | printk ("ide-scsi: %s: wrap up check %lu, rst = ", drive->name, opc->scsi_cmd->serial_number); | |
1c065787 | 303 | ide_scsi_hex_dump(pc->buf, 16); |
1da177e4 | 304 | } |
1c065787 BP |
305 | memcpy((void *) opc->scsi_cmd->sense_buffer, pc->buf, |
306 | SCSI_SENSE_BUFFERSIZE); | |
307 | kfree(pc->buf); | |
1da177e4 LT |
308 | kfree(pc); |
309 | kfree(rq); | |
310 | pc = opc; | |
311 | rq = pc->rq; | |
312 | pc->scsi_cmd->result = (CHECK_CONDITION << 1) | | |
e3bfae4c BP |
313 | (((pc->flags & PC_FLAG_TIMEDOUT) ? |
314 | DID_TIME_OUT : | |
315 | DID_OK) << 16); | |
316 | } else if (pc->flags & PC_FLAG_TIMEDOUT) { | |
1da177e4 LT |
317 | if (log) |
318 | printk (KERN_WARNING "ide-scsi: %s: timed out for %lu\n", | |
319 | drive->name, pc->scsi_cmd->serial_number); | |
320 | pc->scsi_cmd->result = DID_TIME_OUT << 16; | |
32565347 | 321 | } else if (errors >= ERROR_MAX) { |
1da177e4 LT |
322 | pc->scsi_cmd->result = DID_ERROR << 16; |
323 | if (log) | |
324 | printk ("ide-scsi: %s: I/O error for %lu\n", drive->name, pc->scsi_cmd->serial_number); | |
32565347 | 325 | } else if (errors) { |
1da177e4 LT |
326 | if (log) |
327 | printk ("ide-scsi: %s: check condition for %lu\n", drive->name, pc->scsi_cmd->serial_number); | |
328 | if (!idescsi_check_condition(drive, rq)) | |
329 | /* we started a request sense, so we'll be back, exit for now */ | |
330 | return 0; | |
331 | pc->scsi_cmd->result = (CHECK_CONDITION << 1) | (DID_OK << 16); | |
332 | } else { | |
333 | pc->scsi_cmd->result = DID_OK << 16; | |
1da177e4 LT |
334 | } |
335 | host = pc->scsi_cmd->device->host; | |
336 | spin_lock_irqsave(host->host_lock, flags); | |
337 | pc->done(pc->scsi_cmd); | |
338 | spin_unlock_irqrestore(host->host_lock, flags); | |
339 | kfree(pc); | |
340 | kfree(rq); | |
341 | scsi->pc = NULL; | |
342 | return 0; | |
343 | } | |
344 | ||
1c065787 | 345 | static inline unsigned long get_timeout(struct ide_atapi_pc *pc) |
1da177e4 LT |
346 | { |
347 | return max_t(unsigned long, WAIT_CMD, pc->timeout - jiffies); | |
348 | } | |
349 | ||
350 | static int idescsi_expiry(ide_drive_t *drive) | |
351 | { | |
d1be0a82 | 352 | idescsi_scsi_t *scsi = drive_to_idescsi(drive); |
1c065787 | 353 | struct ide_atapi_pc *pc = scsi->pc; |
1da177e4 LT |
354 | |
355 | #if IDESCSI_DEBUG_LOG | |
356 | printk(KERN_WARNING "idescsi_expiry called for %lu at %lu\n", pc->scsi_cmd->serial_number, jiffies); | |
357 | #endif | |
e3bfae4c | 358 | pc->flags |= PC_FLAG_TIMEDOUT; |
1da177e4 LT |
359 | |
360 | return 0; /* we do not want the ide subsystem to retry */ | |
361 | } | |
362 | ||
363 | /* | |
364 | * Our interrupt handler. | |
365 | */ | |
366 | static ide_startstop_t idescsi_pc_intr (ide_drive_t *drive) | |
367 | { | |
368 | idescsi_scsi_t *scsi = drive_to_idescsi(drive); | |
790d1239 | 369 | ide_hwif_t *hwif = drive->hwif; |
1c065787 | 370 | struct ide_atapi_pc *pc = scsi->pc; |
1da177e4 | 371 | struct request *rq = pc->rq; |
1da177e4 | 372 | unsigned int temp; |
790d1239 | 373 | u16 bcount; |
8e7657ae | 374 | u8 stat, ireason; |
1da177e4 LT |
375 | |
376 | #if IDESCSI_DEBUG_LOG | |
377 | printk (KERN_INFO "ide-scsi: Reached idescsi_pc_intr interrupt handler\n"); | |
378 | #endif /* IDESCSI_DEBUG_LOG */ | |
379 | ||
e3bfae4c | 380 | if (pc->flags & PC_FLAG_TIMEDOUT) { |
1da177e4 LT |
381 | #if IDESCSI_DEBUG_LOG |
382 | printk(KERN_WARNING "idescsi_pc_intr: got timed out packet %lu at %lu\n", | |
383 | pc->scsi_cmd->serial_number, jiffies); | |
384 | #endif | |
385 | /* end this request now - scsi should retry it*/ | |
386 | idescsi_end_request (drive, 1, 0); | |
387 | return ide_stopped; | |
388 | } | |
e3bfae4c BP |
389 | if (pc->flags & PC_FLAG_DMA_IN_PROGRESS) { |
390 | pc->flags &= ~PC_FLAG_DMA_IN_PROGRESS; | |
1da177e4 LT |
391 | #if IDESCSI_DEBUG_LOG |
392 | printk ("ide-scsi: %s: DMA complete\n", drive->name); | |
393 | #endif /* IDESCSI_DEBUG_LOG */ | |
1c065787 | 394 | pc->xferred = pc->req_xfer; |
5e37bdc0 | 395 | (void)hwif->dma_ops->dma_end(drive); |
1da177e4 LT |
396 | } |
397 | ||
1da177e4 | 398 | /* Clear the interrupt */ |
c47137a9 | 399 | stat = ide_read_status(drive); |
1da177e4 | 400 | |
22c525b9 | 401 | if ((stat & DRQ_STAT) == 0) { |
1da177e4 LT |
402 | /* No more interrupts */ |
403 | if (test_bit(IDESCSI_LOG_CMD, &scsi->log)) | |
1c065787 BP |
404 | printk(KERN_INFO "Packet command completed, %d bytes" |
405 | " transferred\n", pc->xferred); | |
36e8e578 | 406 | local_irq_enable_in_hardirq(); |
22c525b9 | 407 | if (stat & ERR_STAT) |
1da177e4 LT |
408 | rq->errors++; |
409 | idescsi_end_request (drive, 1, 0); | |
410 | return ide_stopped; | |
411 | } | |
4c3032d8 BZ |
412 | bcount = (hwif->INB(hwif->io_ports.lbah_addr) << 8) | |
413 | hwif->INB(hwif->io_ports.lbam_addr); | |
414 | ireason = hwif->INB(hwif->io_ports.nsect_addr); | |
1da177e4 | 415 | |
8e7657ae | 416 | if (ireason & CD) { |
1da177e4 LT |
417 | printk(KERN_ERR "ide-scsi: CoD != 0 in idescsi_pc_intr\n"); |
418 | return ide_do_reset (drive); | |
419 | } | |
8e7657ae | 420 | if (ireason & IO) { |
1c065787 BP |
421 | temp = pc->xferred + bcount; |
422 | if (temp > pc->req_xfer) { | |
423 | if (temp > pc->buf_size) { | |
1da177e4 LT |
424 | printk(KERN_ERR "ide-scsi: The scsi wants to " |
425 | "send us more data than expected " | |
426 | "- discarding data\n"); | |
1c065787 | 427 | temp = pc->buf_size - pc->xferred; |
1da177e4 | 428 | if (temp) { |
e3bfae4c | 429 | pc->flags &= ~PC_FLAG_WRITING; |
1da177e4 | 430 | if (pc->sg) |
1c065787 BP |
431 | idescsi_input_buffers(drive, pc, |
432 | temp); | |
1da177e4 | 433 | else |
9567b349 BZ |
434 | hwif->input_data(drive, NULL, |
435 | pc->cur_pos, temp); | |
790d1239 BZ |
436 | printk(KERN_ERR "ide-scsi: transferred" |
437 | " %d of %d bytes\n", | |
438 | temp, bcount); | |
1da177e4 | 439 | } |
1c065787 BP |
440 | pc->xferred += temp; |
441 | pc->cur_pos += temp; | |
9f87abe8 | 442 | ide_pad_transfer(drive, 0, bcount - temp); |
1da177e4 LT |
443 | ide_set_handler(drive, &idescsi_pc_intr, get_timeout(pc), idescsi_expiry); |
444 | return ide_started; | |
445 | } | |
446 | #if IDESCSI_DEBUG_LOG | |
447 | printk (KERN_NOTICE "ide-scsi: The scsi wants to send us more data than expected - allowing transfer\n"); | |
448 | #endif /* IDESCSI_DEBUG_LOG */ | |
449 | } | |
450 | } | |
8e7657ae | 451 | if (ireason & IO) { |
e3bfae4c | 452 | pc->flags &= ~PC_FLAG_WRITING; |
1da177e4 | 453 | if (pc->sg) |
790d1239 | 454 | idescsi_input_buffers(drive, pc, bcount); |
1da177e4 | 455 | else |
9567b349 | 456 | hwif->input_data(drive, NULL, pc->cur_pos, bcount); |
1da177e4 | 457 | } else { |
e3bfae4c | 458 | pc->flags |= PC_FLAG_WRITING; |
1da177e4 | 459 | if (pc->sg) |
790d1239 | 460 | idescsi_output_buffers(drive, pc, bcount); |
1da177e4 | 461 | else |
9567b349 | 462 | hwif->output_data(drive, NULL, pc->cur_pos, bcount); |
1da177e4 LT |
463 | } |
464 | /* Update the current position */ | |
1c065787 BP |
465 | pc->xferred += bcount; |
466 | pc->cur_pos += bcount; | |
1da177e4 LT |
467 | |
468 | /* And set the interrupt handler again */ | |
469 | ide_set_handler(drive, &idescsi_pc_intr, get_timeout(pc), idescsi_expiry); | |
470 | return ide_started; | |
471 | } | |
472 | ||
473 | static ide_startstop_t idescsi_transfer_pc(ide_drive_t *drive) | |
474 | { | |
475 | ide_hwif_t *hwif = drive->hwif; | |
476 | idescsi_scsi_t *scsi = drive_to_idescsi(drive); | |
1c065787 | 477 | struct ide_atapi_pc *pc = scsi->pc; |
1da177e4 | 478 | ide_startstop_t startstop; |
8e7657ae | 479 | u8 ireason; |
1da177e4 LT |
480 | |
481 | if (ide_wait_stat(&startstop,drive,DRQ_STAT,BUSY_STAT,WAIT_READY)) { | |
482 | printk(KERN_ERR "ide-scsi: Strange, packet command " | |
483 | "initiated yet DRQ isn't asserted\n"); | |
484 | return startstop; | |
485 | } | |
4c3032d8 | 486 | ireason = hwif->INB(hwif->io_ports.nsect_addr); |
8e7657ae | 487 | if ((ireason & CD) == 0 || (ireason & IO)) { |
1da177e4 LT |
488 | printk(KERN_ERR "ide-scsi: (IO,CoD) != (0,1) while " |
489 | "issuing a packet command\n"); | |
490 | return ide_do_reset (drive); | |
491 | } | |
125e1874 | 492 | BUG_ON(HWGROUP(drive)->handler != NULL); |
1da177e4 LT |
493 | /* Set the interrupt routine */ |
494 | ide_set_handler(drive, &idescsi_pc_intr, get_timeout(pc), idescsi_expiry); | |
9567b349 | 495 | |
1da177e4 | 496 | /* Send the actual packet */ |
9567b349 BZ |
497 | hwif->output_data(drive, NULL, scsi->pc->c, 12); |
498 | ||
e3bfae4c BP |
499 | if (pc->flags & PC_FLAG_DMA_OK) { |
500 | pc->flags |= PC_FLAG_DMA_IN_PROGRESS; | |
5e37bdc0 | 501 | hwif->dma_ops->dma_start(drive); |
1da177e4 LT |
502 | } |
503 | return ide_started; | |
504 | } | |
505 | ||
1c065787 | 506 | static inline int idescsi_set_direction(struct ide_atapi_pc *pc) |
1da177e4 LT |
507 | { |
508 | switch (pc->c[0]) { | |
509 | case READ_6: case READ_10: case READ_12: | |
e3bfae4c | 510 | pc->flags &= ~PC_FLAG_WRITING; |
1da177e4 LT |
511 | return 0; |
512 | case WRITE_6: case WRITE_10: case WRITE_12: | |
e3bfae4c | 513 | pc->flags |= PC_FLAG_WRITING; |
1da177e4 LT |
514 | return 0; |
515 | default: | |
516 | return 1; | |
517 | } | |
518 | } | |
519 | ||
1c065787 | 520 | static int idescsi_map_sg(ide_drive_t *drive, struct ide_atapi_pc *pc) |
1da177e4 LT |
521 | { |
522 | ide_hwif_t *hwif = drive->hwif; | |
523 | struct scatterlist *sg, *scsi_sg; | |
524 | int segments; | |
525 | ||
1c065787 | 526 | if (!pc->req_xfer || pc->req_xfer % 1024) |
1da177e4 LT |
527 | return 1; |
528 | ||
529 | if (idescsi_set_direction(pc)) | |
530 | return 1; | |
531 | ||
532 | sg = hwif->sg_table; | |
427d0bd4 BH |
533 | scsi_sg = scsi_sglist(pc->scsi_cmd); |
534 | segments = scsi_sg_count(pc->scsi_cmd); | |
1da177e4 LT |
535 | |
536 | if (segments > hwif->sg_max_nents) | |
537 | return 1; | |
538 | ||
427d0bd4 BH |
539 | hwif->sg_nents = segments; |
540 | memcpy(sg, scsi_sg, sizeof(*sg) * segments); | |
1da177e4 LT |
541 | |
542 | return 0; | |
543 | } | |
544 | ||
1c065787 BP |
545 | static ide_startstop_t idescsi_issue_pc(ide_drive_t *drive, |
546 | struct ide_atapi_pc *pc) | |
1da177e4 LT |
547 | { |
548 | idescsi_scsi_t *scsi = drive_to_idescsi(drive); | |
549 | ide_hwif_t *hwif = drive->hwif; | |
790d1239 | 550 | u16 bcount; |
e5f9f5a8 | 551 | u8 dma = 0; |
1da177e4 | 552 | |
1c065787 BP |
553 | /* Set the current packet command */ |
554 | scsi->pc = pc; | |
555 | /* We haven't transferred any data yet */ | |
556 | pc->xferred = 0; | |
557 | pc->cur_pos = pc->buf; | |
790d1239 | 558 | /* Request to transfer the entire buffer at once */ |
1c065787 | 559 | bcount = min(pc->req_xfer, 63 * 1024); |
1da177e4 | 560 | |
1da177e4 LT |
561 | if (drive->using_dma && !idescsi_map_sg(drive, pc)) { |
562 | hwif->sg_mapped = 1; | |
5e37bdc0 | 563 | dma = !hwif->dma_ops->dma_setup(drive); |
1da177e4 LT |
564 | hwif->sg_mapped = 0; |
565 | } | |
566 | ||
9a410e79 | 567 | ide_pktcmd_tf_load(drive, 0, bcount, dma); |
1da177e4 | 568 | |
e5f9f5a8 | 569 | if (dma) |
e3bfae4c | 570 | pc->flags |= PC_FLAG_DMA_OK; |
1da177e4 LT |
571 | |
572 | if (test_bit(IDESCSI_DRQ_INTERRUPT, &scsi->flags)) { | |
2d6027f0 BZ |
573 | ide_execute_command(drive, WIN_PACKETCMD, &idescsi_transfer_pc, |
574 | get_timeout(pc), idescsi_expiry); | |
1da177e4 LT |
575 | return ide_started; |
576 | } else { | |
577 | /* Issue the packet command */ | |
1fc14258 | 578 | ide_execute_pkt_cmd(drive); |
1da177e4 LT |
579 | return idescsi_transfer_pc(drive); |
580 | } | |
581 | } | |
582 | ||
583 | /* | |
584 | * idescsi_do_request is our request handling function. | |
585 | */ | |
586 | static ide_startstop_t idescsi_do_request (ide_drive_t *drive, struct request *rq, sector_t block) | |
587 | { | |
588 | #if IDESCSI_DEBUG_LOG | |
cdd60262 | 589 | printk (KERN_INFO "dev: %s, cmd: %x, errors: %d\n", rq->rq_disk->disk_name,rq->cmd[0],rq->errors); |
1da177e4 LT |
590 | printk (KERN_INFO "sector: %ld, nr_sectors: %ld, current_nr_sectors: %d\n",rq->sector,rq->nr_sectors,rq->current_nr_sectors); |
591 | #endif /* IDESCSI_DEBUG_LOG */ | |
592 | ||
4aff5e23 | 593 | if (blk_sense_request(rq) || blk_special_request(rq)) { |
1c065787 BP |
594 | return idescsi_issue_pc(drive, |
595 | (struct ide_atapi_pc *) rq->special); | |
1da177e4 LT |
596 | } |
597 | blk_dump_rq_flags(rq, "ide-scsi: unsup command"); | |
598 | idescsi_end_request (drive, 0, 0); | |
599 | return ide_stopped; | |
600 | } | |
601 | ||
7662d046 | 602 | #ifdef CONFIG_IDE_PROC_FS |
1da177e4 LT |
603 | static void idescsi_add_settings(ide_drive_t *drive) |
604 | { | |
605 | idescsi_scsi_t *scsi = drive_to_idescsi(drive); | |
606 | ||
607 | /* | |
1497943e | 608 | * drive setting name read/write data type min max mul_factor div_factor data pointer set function |
1da177e4 | 609 | */ |
1497943e BZ |
610 | ide_add_setting(drive, "bios_cyl", SETTING_RW, TYPE_INT, 0, 1023, 1, 1, &drive->bios_cyl, NULL); |
611 | ide_add_setting(drive, "bios_head", SETTING_RW, TYPE_BYTE, 0, 255, 1, 1, &drive->bios_head, NULL); | |
612 | ide_add_setting(drive, "bios_sect", SETTING_RW, TYPE_BYTE, 0, 63, 1, 1, &drive->bios_sect, NULL); | |
613 | ide_add_setting(drive, "transform", SETTING_RW, TYPE_INT, 0, 3, 1, 1, &scsi->transform, NULL); | |
614 | ide_add_setting(drive, "log", SETTING_RW, TYPE_INT, 0, 1, 1, 1, &scsi->log, NULL); | |
1da177e4 | 615 | } |
7662d046 BZ |
616 | #else |
617 | static inline void idescsi_add_settings(ide_drive_t *drive) { ; } | |
618 | #endif | |
1da177e4 LT |
619 | |
620 | /* | |
621 | * Driver initialization. | |
622 | */ | |
623 | static void idescsi_setup (ide_drive_t *drive, idescsi_scsi_t *scsi) | |
624 | { | |
1da177e4 LT |
625 | if (drive->id && (drive->id->config & 0x0060) == 0x20) |
626 | set_bit (IDESCSI_DRQ_INTERRUPT, &scsi->flags); | |
1da177e4 LT |
627 | clear_bit(IDESCSI_SG_TRANSFORM, &scsi->transform); |
628 | #if IDESCSI_DEBUG_LOG | |
629 | set_bit(IDESCSI_LOG_CMD, &scsi->log); | |
630 | #endif /* IDESCSI_DEBUG_LOG */ | |
631 | idescsi_add_settings(drive); | |
1da177e4 LT |
632 | } |
633 | ||
b62735d9 | 634 | static void ide_scsi_remove(ide_drive_t *drive) |
1da177e4 LT |
635 | { |
636 | struct Scsi_Host *scsihost = drive->driver_data; | |
637 | struct ide_scsi_obj *scsi = scsihost_to_idescsi(scsihost); | |
638 | struct gendisk *g = scsi->disk; | |
639 | ||
6fdea8db | 640 | scsi_remove_host(scsihost); |
7662d046 | 641 | ide_proc_unregister_driver(drive, scsi->driver); |
1da177e4 LT |
642 | |
643 | ide_unregister_region(g); | |
644 | ||
645 | drive->driver_data = NULL; | |
646 | g->private_data = NULL; | |
647 | put_disk(g); | |
648 | ||
1da177e4 | 649 | ide_scsi_put(scsi); |
1da177e4 LT |
650 | } |
651 | ||
b62735d9 | 652 | static int ide_scsi_probe(ide_drive_t *); |
1da177e4 | 653 | |
ecfd80e4 | 654 | #ifdef CONFIG_IDE_PROC_FS |
1da177e4 LT |
655 | static ide_proc_entry_t idescsi_proc[] = { |
656 | { "capacity", S_IFREG|S_IRUGO, proc_ide_read_capacity, NULL }, | |
657 | { NULL, 0, NULL, NULL } | |
658 | }; | |
1da177e4 LT |
659 | #endif |
660 | ||
1da177e4 | 661 | static ide_driver_t idescsi_driver = { |
8604affd | 662 | .gen_driver = { |
4ef3b8f4 | 663 | .owner = THIS_MODULE, |
8604affd BZ |
664 | .name = "ide-scsi", |
665 | .bus = &ide_bus_type, | |
8604affd | 666 | }, |
b62735d9 MP |
667 | .probe = ide_scsi_probe, |
668 | .remove = ide_scsi_remove, | |
1da177e4 LT |
669 | .version = IDESCSI_VERSION, |
670 | .media = ide_scsi, | |
1da177e4 | 671 | .supports_dsc_overlap = 0, |
1da177e4 LT |
672 | .do_request = idescsi_do_request, |
673 | .end_request = idescsi_end_request, | |
674 | .error = idescsi_atapi_error, | |
675 | .abort = idescsi_atapi_abort, | |
7662d046 BZ |
676 | #ifdef CONFIG_IDE_PROC_FS |
677 | .proc = idescsi_proc, | |
678 | #endif | |
1da177e4 LT |
679 | }; |
680 | ||
681 | static int idescsi_ide_open(struct inode *inode, struct file *filp) | |
682 | { | |
683 | struct gendisk *disk = inode->i_bdev->bd_disk; | |
684 | struct ide_scsi_obj *scsi; | |
1da177e4 LT |
685 | |
686 | if (!(scsi = ide_scsi_get(disk))) | |
687 | return -ENXIO; | |
688 | ||
1da177e4 LT |
689 | return 0; |
690 | } | |
691 | ||
692 | static int idescsi_ide_release(struct inode *inode, struct file *filp) | |
693 | { | |
694 | struct gendisk *disk = inode->i_bdev->bd_disk; | |
695 | struct ide_scsi_obj *scsi = ide_scsi_g(disk); | |
1da177e4 LT |
696 | |
697 | ide_scsi_put(scsi); | |
698 | ||
699 | return 0; | |
700 | } | |
701 | ||
702 | static int idescsi_ide_ioctl(struct inode *inode, struct file *file, | |
703 | unsigned int cmd, unsigned long arg) | |
704 | { | |
705 | struct block_device *bdev = inode->i_bdev; | |
706 | struct ide_scsi_obj *scsi = ide_scsi_g(bdev->bd_disk); | |
707 | return generic_ide_ioctl(scsi->drive, file, bdev, cmd, arg); | |
708 | } | |
709 | ||
710 | static struct block_device_operations idescsi_ops = { | |
711 | .owner = THIS_MODULE, | |
712 | .open = idescsi_ide_open, | |
713 | .release = idescsi_ide_release, | |
714 | .ioctl = idescsi_ide_ioctl, | |
715 | }; | |
716 | ||
1da177e4 LT |
717 | static int idescsi_slave_configure(struct scsi_device * sdp) |
718 | { | |
719 | /* Configure detected device */ | |
427d0bd4 BH |
720 | sdp->use_10_for_rw = 1; |
721 | sdp->use_10_for_ms = 1; | |
1da177e4 LT |
722 | scsi_adjust_queue_depth(sdp, MSG_SIMPLE_TAG, sdp->host->cmd_per_lun); |
723 | return 0; | |
724 | } | |
725 | ||
726 | static const char *idescsi_info (struct Scsi_Host *host) | |
727 | { | |
728 | return "SCSI host adapter emulation for IDE ATAPI devices"; | |
729 | } | |
730 | ||
731 | static int idescsi_ioctl (struct scsi_device *dev, int cmd, void __user *arg) | |
732 | { | |
733 | idescsi_scsi_t *scsi = scsihost_to_idescsi(dev->host); | |
734 | ||
735 | if (cmd == SG_SET_TRANSFORM) { | |
736 | if (arg) | |
737 | set_bit(IDESCSI_SG_TRANSFORM, &scsi->transform); | |
738 | else | |
739 | clear_bit(IDESCSI_SG_TRANSFORM, &scsi->transform); | |
740 | return 0; | |
741 | } else if (cmd == SG_GET_TRANSFORM) | |
742 | return put_user(test_bit(IDESCSI_SG_TRANSFORM, &scsi->transform), (int __user *) arg); | |
743 | return -EINVAL; | |
744 | } | |
745 | ||
1da177e4 LT |
746 | static int idescsi_queue (struct scsi_cmnd *cmd, |
747 | void (*done)(struct scsi_cmnd *)) | |
748 | { | |
749 | struct Scsi_Host *host = cmd->device->host; | |
750 | idescsi_scsi_t *scsi = scsihost_to_idescsi(host); | |
751 | ide_drive_t *drive = scsi->drive; | |
752 | struct request *rq = NULL; | |
1c065787 | 753 | struct ide_atapi_pc *pc = NULL; |
1da177e4 LT |
754 | |
755 | if (!drive) { | |
017560fc | 756 | scmd_printk (KERN_ERR, cmd, "drive not present\n"); |
1da177e4 LT |
757 | goto abort; |
758 | } | |
759 | scsi = drive_to_idescsi(drive); | |
1c065787 BP |
760 | pc = kmalloc(sizeof(struct ide_atapi_pc), GFP_ATOMIC); |
761 | rq = kmalloc(sizeof(struct request), GFP_ATOMIC); | |
1da177e4 LT |
762 | if (rq == NULL || pc == NULL) { |
763 | printk (KERN_ERR "ide-scsi: %s: out of memory\n", drive->name); | |
764 | goto abort; | |
765 | } | |
766 | ||
767 | memset (pc->c, 0, 12); | |
768 | pc->flags = 0; | |
769 | pc->rq = rq; | |
770 | memcpy (pc->c, cmd->cmnd, cmd->cmd_len); | |
1c065787 | 771 | pc->buf = NULL; |
427d0bd4 | 772 | pc->sg = scsi_sglist(cmd); |
c79d88b7 | 773 | pc->sg_cnt = scsi_sg_count(cmd); |
1da177e4 | 774 | pc->b_count = 0; |
1c065787 | 775 | pc->req_xfer = pc->buf_size = scsi_bufflen(cmd); |
1da177e4 LT |
776 | pc->scsi_cmd = cmd; |
777 | pc->done = done; | |
778 | pc->timeout = jiffies + cmd->timeout_per_command; | |
779 | ||
1da177e4 LT |
780 | if (test_bit(IDESCSI_LOG_CMD, &scsi->log)) { |
781 | printk ("ide-scsi: %s: que %lu, cmd = ", drive->name, cmd->serial_number); | |
69ae6fee | 782 | ide_scsi_hex_dump(cmd->cmnd, cmd->cmd_len); |
1da177e4 LT |
783 | if (memcmp(pc->c, cmd->cmnd, cmd->cmd_len)) { |
784 | printk ("ide-scsi: %s: que %lu, tsl = ", drive->name, cmd->serial_number); | |
69ae6fee | 785 | ide_scsi_hex_dump(pc->c, 12); |
1da177e4 LT |
786 | } |
787 | } | |
788 | ||
124cafc5 | 789 | blk_rq_init(NULL, rq); |
1da177e4 | 790 | rq->special = (char *) pc; |
4aff5e23 | 791 | rq->cmd_type = REQ_TYPE_SPECIAL; |
1da177e4 LT |
792 | spin_unlock_irq(host->host_lock); |
793 | rq->rq_disk = scsi->disk; | |
794 | (void) ide_do_drive_cmd (drive, rq, ide_end); | |
795 | spin_lock_irq(host->host_lock); | |
796 | return 0; | |
797 | abort: | |
c9475cb0 JJ |
798 | kfree (pc); |
799 | kfree (rq); | |
1da177e4 LT |
800 | cmd->result = DID_ERROR << 16; |
801 | done(cmd); | |
802 | return 0; | |
803 | } | |
804 | ||
805 | static int idescsi_eh_abort (struct scsi_cmnd *cmd) | |
806 | { | |
807 | idescsi_scsi_t *scsi = scsihost_to_idescsi(cmd->device->host); | |
808 | ide_drive_t *drive = scsi->drive; | |
809 | int busy; | |
810 | int ret = FAILED; | |
811 | ||
812 | /* In idescsi_eh_abort we try to gently pry our command from the ide subsystem */ | |
813 | ||
814 | if (test_bit(IDESCSI_LOG_CMD, &scsi->log)) | |
815 | printk (KERN_WARNING "ide-scsi: abort called for %lu\n", cmd->serial_number); | |
816 | ||
817 | if (!drive) { | |
818 | printk (KERN_WARNING "ide-scsi: Drive not set in idescsi_eh_abort\n"); | |
819 | WARN_ON(1); | |
820 | goto no_drive; | |
821 | } | |
822 | ||
823 | /* First give it some more time, how much is "right" is hard to say :-( */ | |
824 | ||
825 | busy = ide_wait_not_busy(HWIF(drive), 100); /* FIXME - uses mdelay which causes latency? */ | |
826 | if (test_bit(IDESCSI_LOG_CMD, &scsi->log)) | |
827 | printk (KERN_WARNING "ide-scsi: drive did%s become ready\n", busy?" not":""); | |
828 | ||
829 | spin_lock_irq(&ide_lock); | |
830 | ||
831 | /* If there is no pc running we're done (our interrupt took care of it) */ | |
832 | if (!scsi->pc) { | |
833 | ret = SUCCESS; | |
834 | goto ide_unlock; | |
835 | } | |
836 | ||
837 | /* It's somewhere in flight. Does ide subsystem agree? */ | |
838 | if (scsi->pc->scsi_cmd->serial_number == cmd->serial_number && !busy && | |
839 | elv_queue_empty(drive->queue) && HWGROUP(drive)->rq != scsi->pc->rq) { | |
840 | /* | |
841 | * FIXME - not sure this condition can ever occur | |
842 | */ | |
843 | printk (KERN_ERR "ide-scsi: cmd aborted!\n"); | |
844 | ||
4aff5e23 | 845 | if (blk_sense_request(scsi->pc->rq)) |
1c065787 | 846 | kfree(scsi->pc->buf); |
1da177e4 LT |
847 | kfree(scsi->pc->rq); |
848 | kfree(scsi->pc); | |
849 | scsi->pc = NULL; | |
850 | ||
851 | ret = SUCCESS; | |
852 | } | |
853 | ||
854 | ide_unlock: | |
855 | spin_unlock_irq(&ide_lock); | |
856 | no_drive: | |
857 | if (test_bit(IDESCSI_LOG_CMD, &scsi->log)) | |
858 | printk (KERN_WARNING "ide-scsi: abort returns %s\n", ret == SUCCESS?"success":"failed"); | |
859 | ||
860 | return ret; | |
861 | } | |
862 | ||
863 | static int idescsi_eh_reset (struct scsi_cmnd *cmd) | |
864 | { | |
865 | struct request *req; | |
866 | idescsi_scsi_t *scsi = scsihost_to_idescsi(cmd->device->host); | |
867 | ide_drive_t *drive = scsi->drive; | |
868 | int ready = 0; | |
869 | int ret = SUCCESS; | |
870 | ||
871 | /* In idescsi_eh_reset we forcefully remove the command from the ide subsystem and reset the device. */ | |
872 | ||
873 | if (test_bit(IDESCSI_LOG_CMD, &scsi->log)) | |
874 | printk (KERN_WARNING "ide-scsi: reset called for %lu\n", cmd->serial_number); | |
875 | ||
876 | if (!drive) { | |
877 | printk (KERN_WARNING "ide-scsi: Drive not set in idescsi_eh_reset\n"); | |
878 | WARN_ON(1); | |
879 | return FAILED; | |
880 | } | |
881 | ||
df0ae249 JG |
882 | spin_lock_irq(cmd->device->host->host_lock); |
883 | spin_lock(&ide_lock); | |
1da177e4 LT |
884 | |
885 | if (!scsi->pc || (req = scsi->pc->rq) != HWGROUP(drive)->rq || !HWGROUP(drive)->handler) { | |
886 | printk (KERN_WARNING "ide-scsi: No active request in idescsi_eh_reset\n"); | |
887 | spin_unlock(&ide_lock); | |
df0ae249 | 888 | spin_unlock_irq(cmd->device->host->host_lock); |
1da177e4 LT |
889 | return FAILED; |
890 | } | |
891 | ||
892 | /* kill current request */ | |
5a330e39 KU |
893 | if (__blk_end_request(req, -EIO, 0)) |
894 | BUG(); | |
4aff5e23 | 895 | if (blk_sense_request(req)) |
1c065787 | 896 | kfree(scsi->pc->buf); |
1da177e4 LT |
897 | kfree(scsi->pc); |
898 | scsi->pc = NULL; | |
899 | kfree(req); | |
900 | ||
901 | /* now nuke the drive queue */ | |
902 | while ((req = elv_next_request(drive->queue))) { | |
5a330e39 KU |
903 | if (__blk_end_request(req, -EIO, 0)) |
904 | BUG(); | |
1da177e4 LT |
905 | } |
906 | ||
907 | HWGROUP(drive)->rq = NULL; | |
908 | HWGROUP(drive)->handler = NULL; | |
909 | HWGROUP(drive)->busy = 1; /* will set this to zero when ide reset finished */ | |
df0ae249 | 910 | spin_unlock(&ide_lock); |
1da177e4 LT |
911 | |
912 | ide_do_reset(drive); | |
913 | ||
914 | /* ide_do_reset starts a polling handler which restarts itself every 50ms until the reset finishes */ | |
915 | ||
916 | do { | |
1da177e4 | 917 | spin_unlock_irq(cmd->device->host->host_lock); |
df0ae249 | 918 | msleep(50); |
1da177e4 LT |
919 | spin_lock_irq(cmd->device->host->host_lock); |
920 | } while ( HWGROUP(drive)->handler ); | |
921 | ||
922 | ready = drive_is_ready(drive); | |
923 | HWGROUP(drive)->busy--; | |
924 | if (!ready) { | |
925 | printk (KERN_ERR "ide-scsi: reset failed!\n"); | |
926 | ret = FAILED; | |
927 | } | |
928 | ||
df0ae249 | 929 | spin_unlock_irq(cmd->device->host->host_lock); |
1da177e4 LT |
930 | return ret; |
931 | } | |
932 | ||
933 | static int idescsi_bios(struct scsi_device *sdev, struct block_device *bdev, | |
934 | sector_t capacity, int *parm) | |
935 | { | |
936 | idescsi_scsi_t *idescsi = scsihost_to_idescsi(sdev->host); | |
937 | ide_drive_t *drive = idescsi->drive; | |
938 | ||
939 | if (drive->bios_cyl && drive->bios_head && drive->bios_sect) { | |
940 | parm[0] = drive->bios_head; | |
941 | parm[1] = drive->bios_sect; | |
942 | parm[2] = drive->bios_cyl; | |
943 | } | |
944 | return 0; | |
945 | } | |
946 | ||
947 | static struct scsi_host_template idescsi_template = { | |
948 | .module = THIS_MODULE, | |
949 | .name = "idescsi", | |
950 | .info = idescsi_info, | |
951 | .slave_configure = idescsi_slave_configure, | |
952 | .ioctl = idescsi_ioctl, | |
953 | .queuecommand = idescsi_queue, | |
954 | .eh_abort_handler = idescsi_eh_abort, | |
955 | .eh_host_reset_handler = idescsi_eh_reset, | |
956 | .bios_param = idescsi_bios, | |
957 | .can_queue = 40, | |
958 | .this_id = -1, | |
959 | .sg_tablesize = 256, | |
960 | .cmd_per_lun = 5, | |
961 | .max_sectors = 128, | |
962 | .use_clustering = DISABLE_CLUSTERING, | |
963 | .emulated = 1, | |
964 | .proc_name = "ide-scsi", | |
965 | }; | |
966 | ||
b62735d9 | 967 | static int ide_scsi_probe(ide_drive_t *drive) |
1da177e4 LT |
968 | { |
969 | idescsi_scsi_t *idescsi; | |
970 | struct Scsi_Host *host; | |
971 | struct gendisk *g; | |
972 | static int warned; | |
973 | int err = -ENOMEM; | |
974 | ||
975 | if (!warned && drive->media == ide_cdrom) { | |
976 | printk(KERN_WARNING "ide-scsi is deprecated for cd burning! Use ide-cd and give dev=/dev/hdX as device\n"); | |
977 | warned = 1; | |
978 | } | |
979 | ||
aaeab80b AC |
980 | if (idescsi_nocd && drive->media == ide_cdrom) |
981 | return -ENODEV; | |
982 | ||
1da177e4 LT |
983 | if (!strstr("ide-scsi", drive->driver_req) || |
984 | !drive->present || | |
985 | drive->media == ide_disk || | |
986 | !(host = scsi_host_alloc(&idescsi_template,sizeof(idescsi_scsi_t)))) | |
8604affd | 987 | return -ENODEV; |
1da177e4 LT |
988 | |
989 | g = alloc_disk(1 << PARTN_BITS); | |
990 | if (!g) | |
991 | goto out_host_put; | |
992 | ||
993 | ide_init_disk(g, drive); | |
994 | ||
995 | host->max_id = 1; | |
996 | ||
997 | #if IDESCSI_DEBUG_LOG | |
998 | if (drive->id->last_lun) | |
999 | printk(KERN_NOTICE "%s: id->last_lun=%u\n", drive->name, drive->id->last_lun); | |
1000 | #endif | |
1001 | if ((drive->id->last_lun & 0x7) != 7) | |
1002 | host->max_lun = (drive->id->last_lun & 0x7) + 1; | |
1003 | else | |
1004 | host->max_lun = 1; | |
1005 | ||
1006 | drive->driver_data = host; | |
1007 | idescsi = scsihost_to_idescsi(host); | |
1008 | idescsi->drive = drive; | |
1009 | idescsi->driver = &idescsi_driver; | |
1010 | idescsi->host = host; | |
1011 | idescsi->disk = g; | |
1012 | g->private_data = &idescsi->driver; | |
7662d046 | 1013 | ide_proc_register_driver(drive, &idescsi_driver); |
8604affd BZ |
1014 | err = 0; |
1015 | idescsi_setup(drive, idescsi); | |
1016 | g->fops = &idescsi_ops; | |
1017 | ide_register_region(g); | |
1018 | err = scsi_add_host(host, &drive->gendev); | |
1da177e4 | 1019 | if (!err) { |
8604affd BZ |
1020 | scsi_scan_host(host); |
1021 | return 0; | |
1da177e4 | 1022 | } |
8604affd BZ |
1023 | /* fall through on error */ |
1024 | ide_unregister_region(g); | |
7662d046 | 1025 | ide_proc_unregister_driver(drive, &idescsi_driver); |
1da177e4 LT |
1026 | |
1027 | put_disk(g); | |
1028 | out_host_put: | |
1029 | scsi_host_put(host); | |
1030 | return err; | |
1031 | } | |
1032 | ||
1033 | static int __init init_idescsi_module(void) | |
1034 | { | |
8604affd | 1035 | return driver_register(&idescsi_driver.gen_driver); |
1da177e4 LT |
1036 | } |
1037 | ||
1038 | static void __exit exit_idescsi_module(void) | |
1039 | { | |
8604affd | 1040 | driver_unregister(&idescsi_driver.gen_driver); |
1da177e4 LT |
1041 | } |
1042 | ||
aaeab80b AC |
1043 | module_param(idescsi_nocd, int, 0600); |
1044 | MODULE_PARM_DESC(idescsi_nocd, "Disable handling of CD-ROMs so they may be driven by ide-cd"); | |
1da177e4 LT |
1045 | module_init(init_idescsi_module); |
1046 | module_exit(exit_idescsi_module); | |
1047 | MODULE_LICENSE("GPL"); |