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 | ||
43a2b5b2 BZ |
63 | #if IDESCSI_DEBUG_LOG |
64 | #define debug_log(fmt, args...) \ | |
65 | printk(KERN_INFO "ide-scsi: " fmt, ## args) | |
66 | #else | |
67 | #define debug_log(fmt, args...) do {} while (0) | |
68 | #endif | |
69 | ||
1da177e4 LT |
70 | /* |
71 | * SCSI command transformation layer | |
72 | */ | |
1da177e4 LT |
73 | #define IDESCSI_SG_TRANSFORM 1 /* /dev/sg transformation */ |
74 | ||
75 | /* | |
76 | * Log flags | |
77 | */ | |
78 | #define IDESCSI_LOG_CMD 0 /* Log SCSI commands */ | |
79 | ||
80 | typedef struct ide_scsi_obj { | |
81 | ide_drive_t *drive; | |
82 | ide_driver_t *driver; | |
83 | struct gendisk *disk; | |
84 | struct Scsi_Host *host; | |
85 | ||
1c065787 | 86 | struct ide_atapi_pc *pc; /* Current packet command */ |
1da177e4 LT |
87 | unsigned long flags; /* Status/Action flags */ |
88 | unsigned long transform; /* SCSI cmd translation layer */ | |
89 | unsigned long log; /* log flags */ | |
90 | } idescsi_scsi_t; | |
91 | ||
e723ccd8 | 92 | static DEFINE_MUTEX(idescsi_ref_mutex); |
1c065787 BP |
93 | /* Set by module param to skip cd */ |
94 | static int idescsi_nocd; | |
1da177e4 LT |
95 | |
96 | #define ide_scsi_g(disk) \ | |
97 | container_of((disk)->private_data, struct ide_scsi_obj, driver) | |
98 | ||
99 | static struct ide_scsi_obj *ide_scsi_get(struct gendisk *disk) | |
100 | { | |
101 | struct ide_scsi_obj *scsi = NULL; | |
102 | ||
e723ccd8 | 103 | mutex_lock(&idescsi_ref_mutex); |
1da177e4 LT |
104 | scsi = ide_scsi_g(disk); |
105 | if (scsi) | |
106 | scsi_host_get(scsi->host); | |
e723ccd8 | 107 | mutex_unlock(&idescsi_ref_mutex); |
1da177e4 LT |
108 | return scsi; |
109 | } | |
110 | ||
111 | static void ide_scsi_put(struct ide_scsi_obj *scsi) | |
112 | { | |
e723ccd8 | 113 | mutex_lock(&idescsi_ref_mutex); |
1da177e4 | 114 | scsi_host_put(scsi->host); |
e723ccd8 | 115 | mutex_unlock(&idescsi_ref_mutex); |
1da177e4 LT |
116 | } |
117 | ||
118 | static inline idescsi_scsi_t *scsihost_to_idescsi(struct Scsi_Host *host) | |
119 | { | |
120 | return (idescsi_scsi_t*) (&host[1]); | |
121 | } | |
122 | ||
123 | static inline idescsi_scsi_t *drive_to_idescsi(ide_drive_t *ide_drive) | |
124 | { | |
125 | return scsihost_to_idescsi(ide_drive->driver_data); | |
126 | } | |
127 | ||
128 | /* | |
129 | * Per ATAPI device status bits. | |
130 | */ | |
131 | #define IDESCSI_DRQ_INTERRUPT 0 /* DRQ interrupt device */ | |
132 | ||
133 | /* | |
134 | * ide-scsi requests. | |
135 | */ | |
136 | #define IDESCSI_PC_RQ 90 | |
137 | ||
1da177e4 | 138 | /* |
3e52fb4d | 139 | * PIO data transfer routine using the scatter gather table. |
1da177e4 | 140 | */ |
3e52fb4d BZ |
141 | static void ide_scsi_io_buffers(ide_drive_t *drive, struct ide_atapi_pc *pc, |
142 | unsigned int bcount, int write) | |
1da177e4 | 143 | { |
9567b349 | 144 | ide_hwif_t *hwif = drive->hwif; |
3e52fb4d | 145 | xfer_func_t *xf = write ? hwif->output_data : hwif->input_data; |
1da177e4 | 146 | char *buf; |
1da177e4 | 147 | int count; |
1da177e4 LT |
148 | |
149 | while (bcount) { | |
1da177e4 | 150 | count = min(pc->sg->length - pc->b_count, bcount); |
45711f1a | 151 | if (PageHighMem(sg_page(pc->sg))) { |
a717f773 AM |
152 | unsigned long flags; |
153 | ||
154 | local_irq_save(flags); | |
45711f1a | 155 | buf = kmap_atomic(sg_page(pc->sg), KM_IRQ0) + |
3e52fb4d BZ |
156 | pc->sg->offset; |
157 | xf(drive, NULL, buf + pc->b_count, count); | |
a717f773 AM |
158 | kunmap_atomic(buf - pc->sg->offset, KM_IRQ0); |
159 | local_irq_restore(flags); | |
160 | } else { | |
45711f1a | 161 | buf = sg_virt(pc->sg); |
3e52fb4d | 162 | xf(drive, NULL, buf + pc->b_count, count); |
a717f773 AM |
163 | } |
164 | bcount -= count; pc->b_count += count; | |
1da177e4 | 165 | if (pc->b_count == pc->sg->length) { |
c79d88b7 | 166 | if (!--pc->sg_cnt) |
d274a987 JA |
167 | break; |
168 | pc->sg = sg_next(pc->sg); | |
1da177e4 LT |
169 | pc->b_count = 0; |
170 | } | |
171 | } | |
d274a987 JA |
172 | |
173 | if (bcount) { | |
3e52fb4d BZ |
174 | printk(KERN_ERR "%s: scatter gather table too small, %s\n", |
175 | drive->name, write ? "padding with zeros" | |
176 | : "discarding data"); | |
177 | ide_pad_transfer(drive, write, bcount); | |
d274a987 | 178 | } |
1da177e4 LT |
179 | } |
180 | ||
69ae6fee BZ |
181 | static void ide_scsi_hex_dump(u8 *data, int len) |
182 | { | |
183 | print_hex_dump(KERN_CONT, "", DUMP_PREFIX_NONE, 16, 1, data, len, 0); | |
184 | } | |
185 | ||
1c065787 BP |
186 | static int idescsi_check_condition(ide_drive_t *drive, |
187 | struct request *failed_cmd) | |
1da177e4 LT |
188 | { |
189 | idescsi_scsi_t *scsi = drive_to_idescsi(drive); | |
1c065787 | 190 | struct ide_atapi_pc *pc; |
1da177e4 LT |
191 | struct request *rq; |
192 | u8 *buf; | |
193 | ||
194 | /* stuff a sense request in front of our current request */ | |
1c065787 | 195 | pc = kzalloc(sizeof(struct ide_atapi_pc), GFP_ATOMIC); |
41ead3c9 MK |
196 | rq = kmalloc(sizeof(struct request), GFP_ATOMIC); |
197 | buf = kzalloc(SCSI_SENSE_BUFFERSIZE, GFP_ATOMIC); | |
198 | if (!pc || !rq || !buf) { | |
c9475cb0 JJ |
199 | kfree(buf); |
200 | kfree(rq); | |
201 | kfree(pc); | |
1da177e4 LT |
202 | return -ENOMEM; |
203 | } | |
124cafc5 | 204 | blk_rq_init(NULL, rq); |
1da177e4 LT |
205 | rq->special = (char *) pc; |
206 | pc->rq = rq; | |
1c065787 | 207 | pc->buf = buf; |
1da177e4 | 208 | pc->c[0] = REQUEST_SENSE; |
1c065787 | 209 | pc->c[4] = pc->req_xfer = pc->buf_size = SCSI_SENSE_BUFFERSIZE; |
4aff5e23 | 210 | rq->cmd_type = REQ_TYPE_SENSE; |
e8a96aa7 | 211 | rq->cmd_flags |= REQ_PREEMPT; |
1da177e4 LT |
212 | pc->timeout = jiffies + WAIT_READY; |
213 | /* NOTE! Save the failed packet command in "rq->buffer" */ | |
1c065787 BP |
214 | rq->buffer = (void *) failed_cmd->special; |
215 | pc->scsi_cmd = ((struct ide_atapi_pc *) failed_cmd->special)->scsi_cmd; | |
1da177e4 LT |
216 | if (test_bit(IDESCSI_LOG_CMD, &scsi->log)) { |
217 | printk ("ide-scsi: %s: queue cmd = ", drive->name); | |
69ae6fee | 218 | ide_scsi_hex_dump(pc->c, 6); |
1da177e4 LT |
219 | } |
220 | rq->rq_disk = scsi->disk; | |
63f5abb0 FT |
221 | ide_do_drive_cmd(drive, rq); |
222 | return 0; | |
1da177e4 LT |
223 | } |
224 | ||
225 | static int idescsi_end_request(ide_drive_t *, int, int); | |
226 | ||
227 | static ide_startstop_t | |
228 | idescsi_atapi_error(ide_drive_t *drive, struct request *rq, u8 stat, u8 err) | |
229 | { | |
23579a2a BZ |
230 | ide_hwif_t *hwif = drive->hwif; |
231 | ||
c47137a9 | 232 | if (ide_read_status(drive) & (BUSY_STAT | DRQ_STAT)) |
1da177e4 | 233 | /* force an abort */ |
f8c4bd0a | 234 | hwif->OUTBSYNC(hwif, WIN_IDLEIMMEDIATE, |
32b3fe4f | 235 | hwif->io_ports.command_addr); |
1da177e4 LT |
236 | |
237 | rq->errors++; | |
238 | ||
239 | idescsi_end_request(drive, 0, 0); | |
240 | ||
241 | return ide_stopped; | |
242 | } | |
243 | ||
244 | static ide_startstop_t | |
245 | idescsi_atapi_abort(ide_drive_t *drive, struct request *rq) | |
246 | { | |
43a2b5b2 | 247 | debug_log("%s called for %lu\n", __func__, |
1c065787 | 248 | ((struct ide_atapi_pc *) rq->special)->scsi_cmd->serial_number); |
43a2b5b2 | 249 | |
1da177e4 LT |
250 | rq->errors |= ERROR_MAX; |
251 | ||
252 | idescsi_end_request(drive, 0, 0); | |
253 | ||
254 | return ide_stopped; | |
255 | } | |
256 | ||
257 | static int idescsi_end_request (ide_drive_t *drive, int uptodate, int nrsecs) | |
258 | { | |
259 | idescsi_scsi_t *scsi = drive_to_idescsi(drive); | |
260 | struct request *rq = HWGROUP(drive)->rq; | |
1c065787 | 261 | struct ide_atapi_pc *pc = (struct ide_atapi_pc *) rq->special; |
1da177e4 LT |
262 | int log = test_bit(IDESCSI_LOG_CMD, &scsi->log); |
263 | struct Scsi_Host *host; | |
32565347 | 264 | int errors = rq->errors; |
1da177e4 LT |
265 | unsigned long flags; |
266 | ||
4aff5e23 | 267 | if (!blk_special_request(rq) && !blk_sense_request(rq)) { |
1da177e4 LT |
268 | ide_end_request(drive, uptodate, nrsecs); |
269 | return 0; | |
270 | } | |
271 | ide_end_drive_cmd (drive, 0, 0); | |
4aff5e23 | 272 | if (blk_sense_request(rq)) { |
1c065787 | 273 | struct ide_atapi_pc *opc = (struct ide_atapi_pc *) rq->buffer; |
1da177e4 LT |
274 | if (log) { |
275 | printk ("ide-scsi: %s: wrap up check %lu, rst = ", drive->name, opc->scsi_cmd->serial_number); | |
1c065787 | 276 | ide_scsi_hex_dump(pc->buf, 16); |
1da177e4 | 277 | } |
1c065787 BP |
278 | memcpy((void *) opc->scsi_cmd->sense_buffer, pc->buf, |
279 | SCSI_SENSE_BUFFERSIZE); | |
280 | kfree(pc->buf); | |
1da177e4 LT |
281 | kfree(pc); |
282 | kfree(rq); | |
283 | pc = opc; | |
284 | rq = pc->rq; | |
285 | pc->scsi_cmd->result = (CHECK_CONDITION << 1) | | |
e3bfae4c BP |
286 | (((pc->flags & PC_FLAG_TIMEDOUT) ? |
287 | DID_TIME_OUT : | |
288 | DID_OK) << 16); | |
289 | } else if (pc->flags & PC_FLAG_TIMEDOUT) { | |
1da177e4 LT |
290 | if (log) |
291 | printk (KERN_WARNING "ide-scsi: %s: timed out for %lu\n", | |
292 | drive->name, pc->scsi_cmd->serial_number); | |
293 | pc->scsi_cmd->result = DID_TIME_OUT << 16; | |
32565347 | 294 | } else if (errors >= ERROR_MAX) { |
1da177e4 LT |
295 | pc->scsi_cmd->result = DID_ERROR << 16; |
296 | if (log) | |
297 | printk ("ide-scsi: %s: I/O error for %lu\n", drive->name, pc->scsi_cmd->serial_number); | |
32565347 | 298 | } else if (errors) { |
1da177e4 LT |
299 | if (log) |
300 | printk ("ide-scsi: %s: check condition for %lu\n", drive->name, pc->scsi_cmd->serial_number); | |
301 | if (!idescsi_check_condition(drive, rq)) | |
302 | /* we started a request sense, so we'll be back, exit for now */ | |
303 | return 0; | |
304 | pc->scsi_cmd->result = (CHECK_CONDITION << 1) | (DID_OK << 16); | |
305 | } else { | |
306 | pc->scsi_cmd->result = DID_OK << 16; | |
1da177e4 LT |
307 | } |
308 | host = pc->scsi_cmd->device->host; | |
309 | spin_lock_irqsave(host->host_lock, flags); | |
310 | pc->done(pc->scsi_cmd); | |
311 | spin_unlock_irqrestore(host->host_lock, flags); | |
312 | kfree(pc); | |
313 | kfree(rq); | |
314 | scsi->pc = NULL; | |
315 | return 0; | |
316 | } | |
317 | ||
1c065787 | 318 | static inline unsigned long get_timeout(struct ide_atapi_pc *pc) |
1da177e4 LT |
319 | { |
320 | return max_t(unsigned long, WAIT_CMD, pc->timeout - jiffies); | |
321 | } | |
322 | ||
323 | static int idescsi_expiry(ide_drive_t *drive) | |
324 | { | |
d1be0a82 | 325 | idescsi_scsi_t *scsi = drive_to_idescsi(drive); |
1c065787 | 326 | struct ide_atapi_pc *pc = scsi->pc; |
1da177e4 | 327 | |
43a2b5b2 BZ |
328 | debug_log("%s called for %lu at %lu\n", __func__, |
329 | pc->scsi_cmd->serial_number, jiffies); | |
330 | ||
e3bfae4c | 331 | pc->flags |= PC_FLAG_TIMEDOUT; |
1da177e4 LT |
332 | |
333 | return 0; /* we do not want the ide subsystem to retry */ | |
334 | } | |
335 | ||
336 | /* | |
337 | * Our interrupt handler. | |
338 | */ | |
339 | static ide_startstop_t idescsi_pc_intr (ide_drive_t *drive) | |
340 | { | |
341 | idescsi_scsi_t *scsi = drive_to_idescsi(drive); | |
790d1239 | 342 | ide_hwif_t *hwif = drive->hwif; |
1c065787 | 343 | struct ide_atapi_pc *pc = scsi->pc; |
1da177e4 | 344 | struct request *rq = pc->rq; |
3e52fb4d | 345 | xfer_func_t *xferfunc; |
1da177e4 | 346 | unsigned int temp; |
790d1239 | 347 | u16 bcount; |
8e7657ae | 348 | u8 stat, ireason; |
1da177e4 | 349 | |
43a2b5b2 | 350 | debug_log("Reached %s interrupt handler\n", __func__); |
1da177e4 | 351 | |
e3bfae4c | 352 | if (pc->flags & PC_FLAG_TIMEDOUT) { |
43a2b5b2 BZ |
353 | debug_log("%s: got timed out packet %lu at %lu\n", __func__, |
354 | pc->scsi_cmd->serial_number, jiffies); | |
1da177e4 LT |
355 | /* end this request now - scsi should retry it*/ |
356 | idescsi_end_request (drive, 1, 0); | |
357 | return ide_stopped; | |
358 | } | |
e3bfae4c | 359 | if (pc->flags & PC_FLAG_DMA_IN_PROGRESS) { |
c04bbc81 BZ |
360 | if (hwif->dma_ops->dma_end(drive)) |
361 | pc->flags |= PC_FLAG_DMA_ERROR; | |
362 | else | |
363 | pc->xferred = pc->req_xfer; | |
43a2b5b2 | 364 | debug_log("%s: DMA finished\n", drive->name); |
1da177e4 LT |
365 | } |
366 | ||
1da177e4 | 367 | /* Clear the interrupt */ |
c47137a9 | 368 | stat = ide_read_status(drive); |
1da177e4 | 369 | |
22c525b9 | 370 | if ((stat & DRQ_STAT) == 0) { |
1da177e4 LT |
371 | /* No more interrupts */ |
372 | if (test_bit(IDESCSI_LOG_CMD, &scsi->log)) | |
1c065787 BP |
373 | printk(KERN_INFO "Packet command completed, %d bytes" |
374 | " transferred\n", pc->xferred); | |
e8e25f03 | 375 | pc->flags &= ~PC_FLAG_DMA_IN_PROGRESS; |
36e8e578 | 376 | local_irq_enable_in_hardirq(); |
c04bbc81 | 377 | if ((stat & ERR_STAT) || (pc->flags & PC_FLAG_DMA_ERROR)) |
1da177e4 LT |
378 | rq->errors++; |
379 | idescsi_end_request (drive, 1, 0); | |
380 | return ide_stopped; | |
381 | } | |
e8e25f03 BZ |
382 | if (pc->flags & PC_FLAG_DMA_IN_PROGRESS) { |
383 | pc->flags &= ~PC_FLAG_DMA_IN_PROGRESS; | |
384 | printk(KERN_ERR "%s: The device wants to issue more interrupts " | |
385 | "in DMA mode\n", drive->name); | |
386 | ide_dma_off(drive); | |
387 | return ide_do_reset(drive); | |
388 | } | |
4c3032d8 BZ |
389 | bcount = (hwif->INB(hwif->io_ports.lbah_addr) << 8) | |
390 | hwif->INB(hwif->io_ports.lbam_addr); | |
391 | ireason = hwif->INB(hwif->io_ports.nsect_addr); | |
1da177e4 | 392 | |
8e7657ae | 393 | if (ireason & CD) { |
568ca927 | 394 | printk(KERN_ERR "%s: CoD != 0 in %s\n", drive->name, __func__); |
1da177e4 LT |
395 | return ide_do_reset (drive); |
396 | } | |
6c60bd8e BZ |
397 | if (((ireason & IO) == IO) == !!(pc->flags & PC_FLAG_WRITING)) { |
398 | /* Hopefully, we will never get here */ | |
399 | printk(KERN_ERR "%s: We wanted to %s, but the device wants us " | |
400 | "to %s!\n", drive->name, | |
401 | (ireason & IO) ? "Write" : "Read", | |
402 | (ireason & IO) ? "Read" : "Write"); | |
403 | return ide_do_reset(drive); | |
404 | } | |
405 | if (!(pc->flags & PC_FLAG_WRITING)) { | |
1c065787 BP |
406 | temp = pc->xferred + bcount; |
407 | if (temp > pc->req_xfer) { | |
408 | if (temp > pc->buf_size) { | |
568ca927 BZ |
409 | printk(KERN_ERR "%s: The device wants to send " |
410 | "us more data than expected - " | |
411 | "discarding data\n", | |
412 | drive->name); | |
1c065787 | 413 | temp = pc->buf_size - pc->xferred; |
1da177e4 | 414 | if (temp) { |
1da177e4 | 415 | if (pc->sg) |
3e52fb4d BZ |
416 | ide_scsi_io_buffers(drive, pc, |
417 | temp, 0); | |
1da177e4 | 418 | else |
9567b349 BZ |
419 | hwif->input_data(drive, NULL, |
420 | pc->cur_pos, temp); | |
568ca927 BZ |
421 | printk(KERN_ERR "%s: transferred %d of " |
422 | "%d bytes\n", | |
423 | drive->name, | |
790d1239 | 424 | temp, bcount); |
1da177e4 | 425 | } |
1c065787 BP |
426 | pc->xferred += temp; |
427 | pc->cur_pos += temp; | |
9f87abe8 | 428 | ide_pad_transfer(drive, 0, bcount - temp); |
1da177e4 LT |
429 | ide_set_handler(drive, &idescsi_pc_intr, get_timeout(pc), idescsi_expiry); |
430 | return ide_started; | |
431 | } | |
568ca927 | 432 | debug_log("The device wants to send us more data than " |
43a2b5b2 | 433 | "expected - allowing transfer\n"); |
1da177e4 | 434 | } |
3e52fb4d BZ |
435 | xferfunc = hwif->input_data; |
436 | } else | |
437 | xferfunc = hwif->output_data; | |
438 | ||
439 | if (pc->sg) | |
440 | ide_scsi_io_buffers(drive, pc, bcount, | |
441 | !!(pc->flags & PC_FLAG_WRITING)); | |
442 | else | |
443 | xferfunc(drive, NULL, pc->cur_pos, bcount); | |
444 | ||
1da177e4 | 445 | /* Update the current position */ |
1c065787 BP |
446 | pc->xferred += bcount; |
447 | pc->cur_pos += bcount; | |
1da177e4 LT |
448 | |
449 | /* And set the interrupt handler again */ | |
450 | ide_set_handler(drive, &idescsi_pc_intr, get_timeout(pc), idescsi_expiry); | |
451 | return ide_started; | |
452 | } | |
453 | ||
454 | static ide_startstop_t idescsi_transfer_pc(ide_drive_t *drive) | |
455 | { | |
1da177e4 | 456 | idescsi_scsi_t *scsi = drive_to_idescsi(drive); |
c8c51129 | 457 | |
594c16d8 BZ |
458 | return ide_transfer_pc(drive, scsi->pc, idescsi_pc_intr, |
459 | get_timeout(scsi->pc), idescsi_expiry); | |
1da177e4 LT |
460 | } |
461 | ||
1c065787 | 462 | static inline int idescsi_set_direction(struct ide_atapi_pc *pc) |
1da177e4 LT |
463 | { |
464 | switch (pc->c[0]) { | |
465 | case READ_6: case READ_10: case READ_12: | |
e3bfae4c | 466 | pc->flags &= ~PC_FLAG_WRITING; |
1da177e4 LT |
467 | return 0; |
468 | case WRITE_6: case WRITE_10: case WRITE_12: | |
e3bfae4c | 469 | pc->flags |= PC_FLAG_WRITING; |
1da177e4 LT |
470 | return 0; |
471 | default: | |
472 | return 1; | |
473 | } | |
474 | } | |
475 | ||
1c065787 | 476 | static int idescsi_map_sg(ide_drive_t *drive, struct ide_atapi_pc *pc) |
1da177e4 LT |
477 | { |
478 | ide_hwif_t *hwif = drive->hwif; | |
479 | struct scatterlist *sg, *scsi_sg; | |
480 | int segments; | |
481 | ||
1c065787 | 482 | if (!pc->req_xfer || pc->req_xfer % 1024) |
1da177e4 LT |
483 | return 1; |
484 | ||
485 | if (idescsi_set_direction(pc)) | |
486 | return 1; | |
487 | ||
488 | sg = hwif->sg_table; | |
427d0bd4 BH |
489 | scsi_sg = scsi_sglist(pc->scsi_cmd); |
490 | segments = scsi_sg_count(pc->scsi_cmd); | |
1da177e4 LT |
491 | |
492 | if (segments > hwif->sg_max_nents) | |
493 | return 1; | |
494 | ||
427d0bd4 BH |
495 | hwif->sg_nents = segments; |
496 | memcpy(sg, scsi_sg, sizeof(*sg) * segments); | |
1da177e4 LT |
497 | |
498 | return 0; | |
499 | } | |
500 | ||
1c065787 BP |
501 | static ide_startstop_t idescsi_issue_pc(ide_drive_t *drive, |
502 | struct ide_atapi_pc *pc) | |
1da177e4 LT |
503 | { |
504 | idescsi_scsi_t *scsi = drive_to_idescsi(drive); | |
505 | ide_hwif_t *hwif = drive->hwif; | |
790d1239 | 506 | u16 bcount; |
e5f9f5a8 | 507 | u8 dma = 0; |
1da177e4 | 508 | |
1c065787 BP |
509 | /* Set the current packet command */ |
510 | scsi->pc = pc; | |
511 | /* We haven't transferred any data yet */ | |
512 | pc->xferred = 0; | |
513 | pc->cur_pos = pc->buf; | |
790d1239 | 514 | /* Request to transfer the entire buffer at once */ |
1c065787 | 515 | bcount = min(pc->req_xfer, 63 * 1024); |
1da177e4 | 516 | |
4cc19689 | 517 | if ((pc->flags & PC_FLAG_DMA_OK) && drive->using_dma) { |
1da177e4 | 518 | hwif->sg_mapped = 1; |
5e37bdc0 | 519 | dma = !hwif->dma_ops->dma_setup(drive); |
1da177e4 LT |
520 | hwif->sg_mapped = 0; |
521 | } | |
522 | ||
4cc19689 BZ |
523 | if (!dma) |
524 | pc->flags &= ~PC_FLAG_DMA_OK; | |
1da177e4 | 525 | |
4cc19689 | 526 | ide_pktcmd_tf_load(drive, 0, bcount, dma); |
1da177e4 | 527 | |
28c7214b | 528 | if (pc->flags & PC_FLAG_DRQ_INTERRUPT) { |
2d6027f0 BZ |
529 | ide_execute_command(drive, WIN_PACKETCMD, &idescsi_transfer_pc, |
530 | get_timeout(pc), idescsi_expiry); | |
1da177e4 LT |
531 | return ide_started; |
532 | } else { | |
533 | /* Issue the packet command */ | |
1fc14258 | 534 | ide_execute_pkt_cmd(drive); |
1da177e4 LT |
535 | return idescsi_transfer_pc(drive); |
536 | } | |
537 | } | |
538 | ||
539 | /* | |
540 | * idescsi_do_request is our request handling function. | |
541 | */ | |
542 | static ide_startstop_t idescsi_do_request (ide_drive_t *drive, struct request *rq, sector_t block) | |
543 | { | |
43a2b5b2 BZ |
544 | debug_log("dev: %s, cmd: %x, errors: %d\n", rq->rq_disk->disk_name, |
545 | rq->cmd[0], rq->errors); | |
546 | debug_log("sector: %ld, nr_sectors: %ld, current_nr_sectors: %d\n", | |
547 | rq->sector, rq->nr_sectors, rq->current_nr_sectors); | |
1da177e4 | 548 | |
4aff5e23 | 549 | if (blk_sense_request(rq) || blk_special_request(rq)) { |
4cc19689 | 550 | struct ide_atapi_pc *pc = (struct ide_atapi_pc *)rq->special; |
28c7214b BZ |
551 | idescsi_scsi_t *scsi = drive_to_idescsi(drive); |
552 | ||
553 | if (test_bit(IDESCSI_DRQ_INTERRUPT, &scsi->flags)) | |
554 | pc->flags |= PC_FLAG_DRQ_INTERRUPT; | |
4cc19689 BZ |
555 | |
556 | if (drive->using_dma && !idescsi_map_sg(drive, pc)) | |
557 | pc->flags |= PC_FLAG_DMA_OK; | |
558 | ||
559 | return idescsi_issue_pc(drive, pc); | |
1da177e4 LT |
560 | } |
561 | blk_dump_rq_flags(rq, "ide-scsi: unsup command"); | |
562 | idescsi_end_request (drive, 0, 0); | |
563 | return ide_stopped; | |
564 | } | |
565 | ||
7662d046 | 566 | #ifdef CONFIG_IDE_PROC_FS |
1da177e4 LT |
567 | static void idescsi_add_settings(ide_drive_t *drive) |
568 | { | |
569 | idescsi_scsi_t *scsi = drive_to_idescsi(drive); | |
570 | ||
571 | /* | |
1497943e | 572 | * drive setting name read/write data type min max mul_factor div_factor data pointer set function |
1da177e4 | 573 | */ |
1497943e BZ |
574 | ide_add_setting(drive, "bios_cyl", SETTING_RW, TYPE_INT, 0, 1023, 1, 1, &drive->bios_cyl, NULL); |
575 | ide_add_setting(drive, "bios_head", SETTING_RW, TYPE_BYTE, 0, 255, 1, 1, &drive->bios_head, NULL); | |
576 | ide_add_setting(drive, "bios_sect", SETTING_RW, TYPE_BYTE, 0, 63, 1, 1, &drive->bios_sect, NULL); | |
577 | ide_add_setting(drive, "transform", SETTING_RW, TYPE_INT, 0, 3, 1, 1, &scsi->transform, NULL); | |
578 | ide_add_setting(drive, "log", SETTING_RW, TYPE_INT, 0, 1, 1, 1, &scsi->log, NULL); | |
1da177e4 | 579 | } |
7662d046 BZ |
580 | #else |
581 | static inline void idescsi_add_settings(ide_drive_t *drive) { ; } | |
582 | #endif | |
1da177e4 LT |
583 | |
584 | /* | |
585 | * Driver initialization. | |
586 | */ | |
587 | static void idescsi_setup (ide_drive_t *drive, idescsi_scsi_t *scsi) | |
588 | { | |
1da177e4 LT |
589 | if (drive->id && (drive->id->config & 0x0060) == 0x20) |
590 | set_bit (IDESCSI_DRQ_INTERRUPT, &scsi->flags); | |
1da177e4 LT |
591 | clear_bit(IDESCSI_SG_TRANSFORM, &scsi->transform); |
592 | #if IDESCSI_DEBUG_LOG | |
593 | set_bit(IDESCSI_LOG_CMD, &scsi->log); | |
594 | #endif /* IDESCSI_DEBUG_LOG */ | |
595 | idescsi_add_settings(drive); | |
1da177e4 LT |
596 | } |
597 | ||
b62735d9 | 598 | static void ide_scsi_remove(ide_drive_t *drive) |
1da177e4 LT |
599 | { |
600 | struct Scsi_Host *scsihost = drive->driver_data; | |
601 | struct ide_scsi_obj *scsi = scsihost_to_idescsi(scsihost); | |
602 | struct gendisk *g = scsi->disk; | |
603 | ||
6fdea8db | 604 | scsi_remove_host(scsihost); |
7662d046 | 605 | ide_proc_unregister_driver(drive, scsi->driver); |
1da177e4 LT |
606 | |
607 | ide_unregister_region(g); | |
608 | ||
609 | drive->driver_data = NULL; | |
610 | g->private_data = NULL; | |
611 | put_disk(g); | |
612 | ||
1da177e4 | 613 | ide_scsi_put(scsi); |
f83cbc77 BZ |
614 | |
615 | drive->scsi = 0; | |
1da177e4 LT |
616 | } |
617 | ||
b62735d9 | 618 | static int ide_scsi_probe(ide_drive_t *); |
1da177e4 | 619 | |
ecfd80e4 | 620 | #ifdef CONFIG_IDE_PROC_FS |
1da177e4 LT |
621 | static ide_proc_entry_t idescsi_proc[] = { |
622 | { "capacity", S_IFREG|S_IRUGO, proc_ide_read_capacity, NULL }, | |
623 | { NULL, 0, NULL, NULL } | |
624 | }; | |
1da177e4 LT |
625 | #endif |
626 | ||
1da177e4 | 627 | static ide_driver_t idescsi_driver = { |
8604affd | 628 | .gen_driver = { |
4ef3b8f4 | 629 | .owner = THIS_MODULE, |
8604affd BZ |
630 | .name = "ide-scsi", |
631 | .bus = &ide_bus_type, | |
8604affd | 632 | }, |
b62735d9 MP |
633 | .probe = ide_scsi_probe, |
634 | .remove = ide_scsi_remove, | |
1da177e4 LT |
635 | .version = IDESCSI_VERSION, |
636 | .media = ide_scsi, | |
1da177e4 | 637 | .supports_dsc_overlap = 0, |
1da177e4 LT |
638 | .do_request = idescsi_do_request, |
639 | .end_request = idescsi_end_request, | |
640 | .error = idescsi_atapi_error, | |
641 | .abort = idescsi_atapi_abort, | |
7662d046 BZ |
642 | #ifdef CONFIG_IDE_PROC_FS |
643 | .proc = idescsi_proc, | |
644 | #endif | |
1da177e4 LT |
645 | }; |
646 | ||
647 | static int idescsi_ide_open(struct inode *inode, struct file *filp) | |
648 | { | |
649 | struct gendisk *disk = inode->i_bdev->bd_disk; | |
650 | struct ide_scsi_obj *scsi; | |
1da177e4 LT |
651 | |
652 | if (!(scsi = ide_scsi_get(disk))) | |
653 | return -ENXIO; | |
654 | ||
1da177e4 LT |
655 | return 0; |
656 | } | |
657 | ||
658 | static int idescsi_ide_release(struct inode *inode, struct file *filp) | |
659 | { | |
660 | struct gendisk *disk = inode->i_bdev->bd_disk; | |
661 | struct ide_scsi_obj *scsi = ide_scsi_g(disk); | |
1da177e4 LT |
662 | |
663 | ide_scsi_put(scsi); | |
664 | ||
665 | return 0; | |
666 | } | |
667 | ||
668 | static int idescsi_ide_ioctl(struct inode *inode, struct file *file, | |
669 | unsigned int cmd, unsigned long arg) | |
670 | { | |
671 | struct block_device *bdev = inode->i_bdev; | |
672 | struct ide_scsi_obj *scsi = ide_scsi_g(bdev->bd_disk); | |
673 | return generic_ide_ioctl(scsi->drive, file, bdev, cmd, arg); | |
674 | } | |
675 | ||
676 | static struct block_device_operations idescsi_ops = { | |
677 | .owner = THIS_MODULE, | |
678 | .open = idescsi_ide_open, | |
679 | .release = idescsi_ide_release, | |
680 | .ioctl = idescsi_ide_ioctl, | |
681 | }; | |
682 | ||
1da177e4 LT |
683 | static int idescsi_slave_configure(struct scsi_device * sdp) |
684 | { | |
685 | /* Configure detected device */ | |
427d0bd4 BH |
686 | sdp->use_10_for_rw = 1; |
687 | sdp->use_10_for_ms = 1; | |
1da177e4 LT |
688 | scsi_adjust_queue_depth(sdp, MSG_SIMPLE_TAG, sdp->host->cmd_per_lun); |
689 | return 0; | |
690 | } | |
691 | ||
692 | static const char *idescsi_info (struct Scsi_Host *host) | |
693 | { | |
694 | return "SCSI host adapter emulation for IDE ATAPI devices"; | |
695 | } | |
696 | ||
697 | static int idescsi_ioctl (struct scsi_device *dev, int cmd, void __user *arg) | |
698 | { | |
699 | idescsi_scsi_t *scsi = scsihost_to_idescsi(dev->host); | |
700 | ||
701 | if (cmd == SG_SET_TRANSFORM) { | |
702 | if (arg) | |
703 | set_bit(IDESCSI_SG_TRANSFORM, &scsi->transform); | |
704 | else | |
705 | clear_bit(IDESCSI_SG_TRANSFORM, &scsi->transform); | |
706 | return 0; | |
707 | } else if (cmd == SG_GET_TRANSFORM) | |
708 | return put_user(test_bit(IDESCSI_SG_TRANSFORM, &scsi->transform), (int __user *) arg); | |
709 | return -EINVAL; | |
710 | } | |
711 | ||
1da177e4 LT |
712 | static int idescsi_queue (struct scsi_cmnd *cmd, |
713 | void (*done)(struct scsi_cmnd *)) | |
714 | { | |
715 | struct Scsi_Host *host = cmd->device->host; | |
716 | idescsi_scsi_t *scsi = scsihost_to_idescsi(host); | |
717 | ide_drive_t *drive = scsi->drive; | |
718 | struct request *rq = NULL; | |
1c065787 | 719 | struct ide_atapi_pc *pc = NULL; |
1da177e4 LT |
720 | |
721 | if (!drive) { | |
017560fc | 722 | scmd_printk (KERN_ERR, cmd, "drive not present\n"); |
1da177e4 LT |
723 | goto abort; |
724 | } | |
725 | scsi = drive_to_idescsi(drive); | |
1c065787 BP |
726 | pc = kmalloc(sizeof(struct ide_atapi_pc), GFP_ATOMIC); |
727 | rq = kmalloc(sizeof(struct request), GFP_ATOMIC); | |
1da177e4 LT |
728 | if (rq == NULL || pc == NULL) { |
729 | printk (KERN_ERR "ide-scsi: %s: out of memory\n", drive->name); | |
730 | goto abort; | |
731 | } | |
732 | ||
733 | memset (pc->c, 0, 12); | |
734 | pc->flags = 0; | |
6c60bd8e BZ |
735 | if (cmd->sc_data_direction == DMA_TO_DEVICE) |
736 | pc->flags |= PC_FLAG_WRITING; | |
1da177e4 LT |
737 | pc->rq = rq; |
738 | memcpy (pc->c, cmd->cmnd, cmd->cmd_len); | |
1c065787 | 739 | pc->buf = NULL; |
427d0bd4 | 740 | pc->sg = scsi_sglist(cmd); |
c79d88b7 | 741 | pc->sg_cnt = scsi_sg_count(cmd); |
1da177e4 | 742 | pc->b_count = 0; |
1c065787 | 743 | pc->req_xfer = pc->buf_size = scsi_bufflen(cmd); |
1da177e4 LT |
744 | pc->scsi_cmd = cmd; |
745 | pc->done = done; | |
746 | pc->timeout = jiffies + cmd->timeout_per_command; | |
747 | ||
1da177e4 LT |
748 | if (test_bit(IDESCSI_LOG_CMD, &scsi->log)) { |
749 | printk ("ide-scsi: %s: que %lu, cmd = ", drive->name, cmd->serial_number); | |
69ae6fee | 750 | ide_scsi_hex_dump(cmd->cmnd, cmd->cmd_len); |
1da177e4 LT |
751 | if (memcmp(pc->c, cmd->cmnd, cmd->cmd_len)) { |
752 | printk ("ide-scsi: %s: que %lu, tsl = ", drive->name, cmd->serial_number); | |
69ae6fee | 753 | ide_scsi_hex_dump(pc->c, 12); |
1da177e4 LT |
754 | } |
755 | } | |
756 | ||
124cafc5 | 757 | blk_rq_init(NULL, rq); |
1da177e4 | 758 | rq->special = (char *) pc; |
4aff5e23 | 759 | rq->cmd_type = REQ_TYPE_SPECIAL; |
1da177e4 | 760 | spin_unlock_irq(host->host_lock); |
7e12ca11 | 761 | blk_execute_rq_nowait(drive->queue, scsi->disk, rq, 0, NULL); |
1da177e4 LT |
762 | spin_lock_irq(host->host_lock); |
763 | return 0; | |
764 | abort: | |
c9475cb0 JJ |
765 | kfree (pc); |
766 | kfree (rq); | |
1da177e4 LT |
767 | cmd->result = DID_ERROR << 16; |
768 | done(cmd); | |
769 | return 0; | |
770 | } | |
771 | ||
772 | static int idescsi_eh_abort (struct scsi_cmnd *cmd) | |
773 | { | |
774 | idescsi_scsi_t *scsi = scsihost_to_idescsi(cmd->device->host); | |
775 | ide_drive_t *drive = scsi->drive; | |
776 | int busy; | |
777 | int ret = FAILED; | |
778 | ||
779 | /* In idescsi_eh_abort we try to gently pry our command from the ide subsystem */ | |
780 | ||
781 | if (test_bit(IDESCSI_LOG_CMD, &scsi->log)) | |
782 | printk (KERN_WARNING "ide-scsi: abort called for %lu\n", cmd->serial_number); | |
783 | ||
784 | if (!drive) { | |
785 | printk (KERN_WARNING "ide-scsi: Drive not set in idescsi_eh_abort\n"); | |
786 | WARN_ON(1); | |
787 | goto no_drive; | |
788 | } | |
789 | ||
790 | /* First give it some more time, how much is "right" is hard to say :-( */ | |
791 | ||
792 | busy = ide_wait_not_busy(HWIF(drive), 100); /* FIXME - uses mdelay which causes latency? */ | |
793 | if (test_bit(IDESCSI_LOG_CMD, &scsi->log)) | |
794 | printk (KERN_WARNING "ide-scsi: drive did%s become ready\n", busy?" not":""); | |
795 | ||
796 | spin_lock_irq(&ide_lock); | |
797 | ||
798 | /* If there is no pc running we're done (our interrupt took care of it) */ | |
799 | if (!scsi->pc) { | |
800 | ret = SUCCESS; | |
801 | goto ide_unlock; | |
802 | } | |
803 | ||
804 | /* It's somewhere in flight. Does ide subsystem agree? */ | |
805 | if (scsi->pc->scsi_cmd->serial_number == cmd->serial_number && !busy && | |
806 | elv_queue_empty(drive->queue) && HWGROUP(drive)->rq != scsi->pc->rq) { | |
807 | /* | |
808 | * FIXME - not sure this condition can ever occur | |
809 | */ | |
810 | printk (KERN_ERR "ide-scsi: cmd aborted!\n"); | |
811 | ||
4aff5e23 | 812 | if (blk_sense_request(scsi->pc->rq)) |
1c065787 | 813 | kfree(scsi->pc->buf); |
1da177e4 LT |
814 | kfree(scsi->pc->rq); |
815 | kfree(scsi->pc); | |
816 | scsi->pc = NULL; | |
817 | ||
818 | ret = SUCCESS; | |
819 | } | |
820 | ||
821 | ide_unlock: | |
822 | spin_unlock_irq(&ide_lock); | |
823 | no_drive: | |
824 | if (test_bit(IDESCSI_LOG_CMD, &scsi->log)) | |
825 | printk (KERN_WARNING "ide-scsi: abort returns %s\n", ret == SUCCESS?"success":"failed"); | |
826 | ||
827 | return ret; | |
828 | } | |
829 | ||
830 | static int idescsi_eh_reset (struct scsi_cmnd *cmd) | |
831 | { | |
832 | struct request *req; | |
833 | idescsi_scsi_t *scsi = scsihost_to_idescsi(cmd->device->host); | |
834 | ide_drive_t *drive = scsi->drive; | |
835 | int ready = 0; | |
836 | int ret = SUCCESS; | |
837 | ||
838 | /* In idescsi_eh_reset we forcefully remove the command from the ide subsystem and reset the device. */ | |
839 | ||
840 | if (test_bit(IDESCSI_LOG_CMD, &scsi->log)) | |
841 | printk (KERN_WARNING "ide-scsi: reset called for %lu\n", cmd->serial_number); | |
842 | ||
843 | if (!drive) { | |
844 | printk (KERN_WARNING "ide-scsi: Drive not set in idescsi_eh_reset\n"); | |
845 | WARN_ON(1); | |
846 | return FAILED; | |
847 | } | |
848 | ||
df0ae249 JG |
849 | spin_lock_irq(cmd->device->host->host_lock); |
850 | spin_lock(&ide_lock); | |
1da177e4 LT |
851 | |
852 | if (!scsi->pc || (req = scsi->pc->rq) != HWGROUP(drive)->rq || !HWGROUP(drive)->handler) { | |
853 | printk (KERN_WARNING "ide-scsi: No active request in idescsi_eh_reset\n"); | |
854 | spin_unlock(&ide_lock); | |
df0ae249 | 855 | spin_unlock_irq(cmd->device->host->host_lock); |
1da177e4 LT |
856 | return FAILED; |
857 | } | |
858 | ||
859 | /* kill current request */ | |
5a330e39 KU |
860 | if (__blk_end_request(req, -EIO, 0)) |
861 | BUG(); | |
4aff5e23 | 862 | if (blk_sense_request(req)) |
1c065787 | 863 | kfree(scsi->pc->buf); |
1da177e4 LT |
864 | kfree(scsi->pc); |
865 | scsi->pc = NULL; | |
866 | kfree(req); | |
867 | ||
868 | /* now nuke the drive queue */ | |
869 | while ((req = elv_next_request(drive->queue))) { | |
5a330e39 KU |
870 | if (__blk_end_request(req, -EIO, 0)) |
871 | BUG(); | |
1da177e4 LT |
872 | } |
873 | ||
874 | HWGROUP(drive)->rq = NULL; | |
875 | HWGROUP(drive)->handler = NULL; | |
876 | HWGROUP(drive)->busy = 1; /* will set this to zero when ide reset finished */ | |
df0ae249 | 877 | spin_unlock(&ide_lock); |
1da177e4 LT |
878 | |
879 | ide_do_reset(drive); | |
880 | ||
881 | /* ide_do_reset starts a polling handler which restarts itself every 50ms until the reset finishes */ | |
882 | ||
883 | do { | |
1da177e4 | 884 | spin_unlock_irq(cmd->device->host->host_lock); |
df0ae249 | 885 | msleep(50); |
1da177e4 LT |
886 | spin_lock_irq(cmd->device->host->host_lock); |
887 | } while ( HWGROUP(drive)->handler ); | |
888 | ||
889 | ready = drive_is_ready(drive); | |
890 | HWGROUP(drive)->busy--; | |
891 | if (!ready) { | |
892 | printk (KERN_ERR "ide-scsi: reset failed!\n"); | |
893 | ret = FAILED; | |
894 | } | |
895 | ||
df0ae249 | 896 | spin_unlock_irq(cmd->device->host->host_lock); |
1da177e4 LT |
897 | return ret; |
898 | } | |
899 | ||
900 | static int idescsi_bios(struct scsi_device *sdev, struct block_device *bdev, | |
901 | sector_t capacity, int *parm) | |
902 | { | |
903 | idescsi_scsi_t *idescsi = scsihost_to_idescsi(sdev->host); | |
904 | ide_drive_t *drive = idescsi->drive; | |
905 | ||
906 | if (drive->bios_cyl && drive->bios_head && drive->bios_sect) { | |
907 | parm[0] = drive->bios_head; | |
908 | parm[1] = drive->bios_sect; | |
909 | parm[2] = drive->bios_cyl; | |
910 | } | |
911 | return 0; | |
912 | } | |
913 | ||
914 | static struct scsi_host_template idescsi_template = { | |
915 | .module = THIS_MODULE, | |
916 | .name = "idescsi", | |
917 | .info = idescsi_info, | |
918 | .slave_configure = idescsi_slave_configure, | |
919 | .ioctl = idescsi_ioctl, | |
920 | .queuecommand = idescsi_queue, | |
921 | .eh_abort_handler = idescsi_eh_abort, | |
922 | .eh_host_reset_handler = idescsi_eh_reset, | |
923 | .bios_param = idescsi_bios, | |
924 | .can_queue = 40, | |
925 | .this_id = -1, | |
926 | .sg_tablesize = 256, | |
927 | .cmd_per_lun = 5, | |
928 | .max_sectors = 128, | |
929 | .use_clustering = DISABLE_CLUSTERING, | |
930 | .emulated = 1, | |
931 | .proc_name = "ide-scsi", | |
932 | }; | |
933 | ||
b62735d9 | 934 | static int ide_scsi_probe(ide_drive_t *drive) |
1da177e4 LT |
935 | { |
936 | idescsi_scsi_t *idescsi; | |
937 | struct Scsi_Host *host; | |
938 | struct gendisk *g; | |
939 | static int warned; | |
940 | int err = -ENOMEM; | |
941 | ||
942 | if (!warned && drive->media == ide_cdrom) { | |
943 | printk(KERN_WARNING "ide-scsi is deprecated for cd burning! Use ide-cd and give dev=/dev/hdX as device\n"); | |
944 | warned = 1; | |
945 | } | |
946 | ||
aaeab80b AC |
947 | if (idescsi_nocd && drive->media == ide_cdrom) |
948 | return -ENODEV; | |
949 | ||
1da177e4 LT |
950 | if (!strstr("ide-scsi", drive->driver_req) || |
951 | !drive->present || | |
952 | drive->media == ide_disk || | |
953 | !(host = scsi_host_alloc(&idescsi_template,sizeof(idescsi_scsi_t)))) | |
8604affd | 954 | return -ENODEV; |
1da177e4 | 955 | |
f83cbc77 BZ |
956 | drive->scsi = 1; |
957 | ||
1da177e4 LT |
958 | g = alloc_disk(1 << PARTN_BITS); |
959 | if (!g) | |
960 | goto out_host_put; | |
961 | ||
962 | ide_init_disk(g, drive); | |
963 | ||
964 | host->max_id = 1; | |
965 | ||
1da177e4 | 966 | if (drive->id->last_lun) |
43a2b5b2 BZ |
967 | debug_log("%s: id->last_lun=%u\n", drive->name, |
968 | drive->id->last_lun); | |
969 | ||
1da177e4 LT |
970 | if ((drive->id->last_lun & 0x7) != 7) |
971 | host->max_lun = (drive->id->last_lun & 0x7) + 1; | |
972 | else | |
973 | host->max_lun = 1; | |
974 | ||
975 | drive->driver_data = host; | |
976 | idescsi = scsihost_to_idescsi(host); | |
977 | idescsi->drive = drive; | |
978 | idescsi->driver = &idescsi_driver; | |
979 | idescsi->host = host; | |
980 | idescsi->disk = g; | |
981 | g->private_data = &idescsi->driver; | |
7662d046 | 982 | ide_proc_register_driver(drive, &idescsi_driver); |
8604affd BZ |
983 | err = 0; |
984 | idescsi_setup(drive, idescsi); | |
985 | g->fops = &idescsi_ops; | |
986 | ide_register_region(g); | |
987 | err = scsi_add_host(host, &drive->gendev); | |
1da177e4 | 988 | if (!err) { |
8604affd BZ |
989 | scsi_scan_host(host); |
990 | return 0; | |
1da177e4 | 991 | } |
8604affd BZ |
992 | /* fall through on error */ |
993 | ide_unregister_region(g); | |
7662d046 | 994 | ide_proc_unregister_driver(drive, &idescsi_driver); |
1da177e4 LT |
995 | |
996 | put_disk(g); | |
997 | out_host_put: | |
f83cbc77 | 998 | drive->scsi = 0; |
1da177e4 LT |
999 | scsi_host_put(host); |
1000 | return err; | |
1001 | } | |
1002 | ||
1003 | static int __init init_idescsi_module(void) | |
1004 | { | |
8604affd | 1005 | return driver_register(&idescsi_driver.gen_driver); |
1da177e4 LT |
1006 | } |
1007 | ||
1008 | static void __exit exit_idescsi_module(void) | |
1009 | { | |
8604affd | 1010 | driver_unregister(&idescsi_driver.gen_driver); |
1da177e4 LT |
1011 | } |
1012 | ||
aaeab80b AC |
1013 | module_param(idescsi_nocd, int, 0600); |
1014 | MODULE_PARM_DESC(idescsi_nocd, "Disable handling of CD-ROMs so they may be driven by ide-cd"); | |
1da177e4 LT |
1015 | module_init(init_idescsi_module); |
1016 | module_exit(exit_idescsi_module); | |
1017 | MODULE_LICENSE("GPL"); |