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 transform; /* SCSI cmd translation layer */ |
88 | unsigned long log; /* log flags */ | |
89 | } idescsi_scsi_t; | |
90 | ||
e723ccd8 | 91 | static DEFINE_MUTEX(idescsi_ref_mutex); |
1c065787 BP |
92 | /* Set by module param to skip cd */ |
93 | static int idescsi_nocd; | |
1da177e4 LT |
94 | |
95 | #define ide_scsi_g(disk) \ | |
96 | container_of((disk)->private_data, struct ide_scsi_obj, driver) | |
97 | ||
98 | static struct ide_scsi_obj *ide_scsi_get(struct gendisk *disk) | |
99 | { | |
100 | struct ide_scsi_obj *scsi = NULL; | |
101 | ||
e723ccd8 | 102 | mutex_lock(&idescsi_ref_mutex); |
1da177e4 | 103 | scsi = ide_scsi_g(disk); |
08da591e | 104 | if (scsi) { |
d3e33ff5 | 105 | if (ide_device_get(scsi->drive)) |
08da591e | 106 | scsi = NULL; |
d3e33ff5 BZ |
107 | else |
108 | scsi_host_get(scsi->host); | |
08da591e | 109 | } |
e723ccd8 | 110 | mutex_unlock(&idescsi_ref_mutex); |
1da177e4 LT |
111 | return scsi; |
112 | } | |
113 | ||
114 | static void ide_scsi_put(struct ide_scsi_obj *scsi) | |
115 | { | |
d3e33ff5 BZ |
116 | ide_drive_t *drive = scsi->drive; |
117 | ||
e723ccd8 | 118 | mutex_lock(&idescsi_ref_mutex); |
1da177e4 | 119 | scsi_host_put(scsi->host); |
d3e33ff5 | 120 | ide_device_put(drive); |
e723ccd8 | 121 | mutex_unlock(&idescsi_ref_mutex); |
1da177e4 LT |
122 | } |
123 | ||
124 | static inline idescsi_scsi_t *scsihost_to_idescsi(struct Scsi_Host *host) | |
125 | { | |
126 | return (idescsi_scsi_t*) (&host[1]); | |
127 | } | |
128 | ||
129 | static inline idescsi_scsi_t *drive_to_idescsi(ide_drive_t *ide_drive) | |
130 | { | |
131 | return scsihost_to_idescsi(ide_drive->driver_data); | |
132 | } | |
133 | ||
1da177e4 | 134 | /* |
3e52fb4d | 135 | * PIO data transfer routine using the scatter gather table. |
1da177e4 | 136 | */ |
3e52fb4d BZ |
137 | static void ide_scsi_io_buffers(ide_drive_t *drive, struct ide_atapi_pc *pc, |
138 | unsigned int bcount, int write) | |
1da177e4 | 139 | { |
9567b349 | 140 | ide_hwif_t *hwif = drive->hwif; |
374e042c BZ |
141 | const struct ide_tp_ops *tp_ops = hwif->tp_ops; |
142 | xfer_func_t *xf = write ? tp_ops->output_data : tp_ops->input_data; | |
1da177e4 | 143 | char *buf; |
1da177e4 | 144 | int count; |
1da177e4 LT |
145 | |
146 | while (bcount) { | |
1da177e4 | 147 | count = min(pc->sg->length - pc->b_count, bcount); |
45711f1a | 148 | if (PageHighMem(sg_page(pc->sg))) { |
a717f773 AM |
149 | unsigned long flags; |
150 | ||
151 | local_irq_save(flags); | |
45711f1a | 152 | buf = kmap_atomic(sg_page(pc->sg), KM_IRQ0) + |
3e52fb4d BZ |
153 | pc->sg->offset; |
154 | xf(drive, NULL, buf + pc->b_count, count); | |
a717f773 AM |
155 | kunmap_atomic(buf - pc->sg->offset, KM_IRQ0); |
156 | local_irq_restore(flags); | |
157 | } else { | |
45711f1a | 158 | buf = sg_virt(pc->sg); |
3e52fb4d | 159 | xf(drive, NULL, buf + pc->b_count, count); |
a717f773 AM |
160 | } |
161 | bcount -= count; pc->b_count += count; | |
1da177e4 | 162 | if (pc->b_count == pc->sg->length) { |
c79d88b7 | 163 | if (!--pc->sg_cnt) |
d274a987 JA |
164 | break; |
165 | pc->sg = sg_next(pc->sg); | |
1da177e4 LT |
166 | pc->b_count = 0; |
167 | } | |
168 | } | |
d274a987 JA |
169 | |
170 | if (bcount) { | |
3e52fb4d BZ |
171 | printk(KERN_ERR "%s: scatter gather table too small, %s\n", |
172 | drive->name, write ? "padding with zeros" | |
173 | : "discarding data"); | |
174 | ide_pad_transfer(drive, write, bcount); | |
d274a987 | 175 | } |
1da177e4 LT |
176 | } |
177 | ||
69ae6fee BZ |
178 | static void ide_scsi_hex_dump(u8 *data, int len) |
179 | { | |
180 | print_hex_dump(KERN_CONT, "", DUMP_PREFIX_NONE, 16, 1, data, len, 0); | |
181 | } | |
182 | ||
c6b2d260 BZ |
183 | static int idescsi_end_request(ide_drive_t *, int, int); |
184 | ||
185 | static void ide_scsi_callback(ide_drive_t *drive) | |
186 | { | |
187 | idescsi_scsi_t *scsi = drive_to_idescsi(drive); | |
188 | struct ide_atapi_pc *pc = scsi->pc; | |
189 | ||
190 | if (pc->flags & PC_FLAG_TIMEDOUT) | |
191 | debug_log("%s: got timed out packet %lu at %lu\n", __func__, | |
192 | pc->scsi_cmd->serial_number, jiffies); | |
193 | /* end this request now - scsi should retry it*/ | |
194 | else if (test_bit(IDESCSI_LOG_CMD, &scsi->log)) | |
195 | printk(KERN_INFO "Packet command completed, %d bytes" | |
196 | " transferred\n", pc->xferred); | |
197 | ||
198 | idescsi_end_request(drive, 1, 0); | |
199 | } | |
200 | ||
1c065787 BP |
201 | static int idescsi_check_condition(ide_drive_t *drive, |
202 | struct request *failed_cmd) | |
1da177e4 LT |
203 | { |
204 | idescsi_scsi_t *scsi = drive_to_idescsi(drive); | |
1c065787 | 205 | struct ide_atapi_pc *pc; |
1da177e4 LT |
206 | struct request *rq; |
207 | u8 *buf; | |
208 | ||
209 | /* stuff a sense request in front of our current request */ | |
1c065787 | 210 | pc = kzalloc(sizeof(struct ide_atapi_pc), GFP_ATOMIC); |
e27420d0 | 211 | rq = blk_get_request(drive->queue, READ, GFP_ATOMIC); |
41ead3c9 MK |
212 | buf = kzalloc(SCSI_SENSE_BUFFERSIZE, GFP_ATOMIC); |
213 | if (!pc || !rq || !buf) { | |
c9475cb0 | 214 | kfree(buf); |
e27420d0 FT |
215 | if (rq) |
216 | blk_put_request(rq); | |
c9475cb0 | 217 | kfree(pc); |
1da177e4 LT |
218 | return -ENOMEM; |
219 | } | |
1da177e4 LT |
220 | rq->special = (char *) pc; |
221 | pc->rq = rq; | |
1c065787 | 222 | pc->buf = buf; |
1da177e4 | 223 | pc->c[0] = REQUEST_SENSE; |
1c065787 | 224 | pc->c[4] = pc->req_xfer = pc->buf_size = SCSI_SENSE_BUFFERSIZE; |
4aff5e23 | 225 | rq->cmd_type = REQ_TYPE_SENSE; |
e8a96aa7 | 226 | rq->cmd_flags |= REQ_PREEMPT; |
1da177e4 LT |
227 | pc->timeout = jiffies + WAIT_READY; |
228 | /* NOTE! Save the failed packet command in "rq->buffer" */ | |
1c065787 BP |
229 | rq->buffer = (void *) failed_cmd->special; |
230 | pc->scsi_cmd = ((struct ide_atapi_pc *) failed_cmd->special)->scsi_cmd; | |
1da177e4 LT |
231 | if (test_bit(IDESCSI_LOG_CMD, &scsi->log)) { |
232 | printk ("ide-scsi: %s: queue cmd = ", drive->name); | |
69ae6fee | 233 | ide_scsi_hex_dump(pc->c, 6); |
1da177e4 LT |
234 | } |
235 | rq->rq_disk = scsi->disk; | |
e27420d0 | 236 | rq->ref_count++; |
08feacf3 | 237 | memcpy(rq->cmd, pc->c, 12); |
63f5abb0 FT |
238 | ide_do_drive_cmd(drive, rq); |
239 | return 0; | |
1da177e4 LT |
240 | } |
241 | ||
1da177e4 LT |
242 | static ide_startstop_t |
243 | idescsi_atapi_error(ide_drive_t *drive, struct request *rq, u8 stat, u8 err) | |
244 | { | |
23579a2a BZ |
245 | ide_hwif_t *hwif = drive->hwif; |
246 | ||
374e042c | 247 | if (hwif->tp_ops->read_status(hwif) & (BUSY_STAT | DRQ_STAT)) |
1da177e4 | 248 | /* force an abort */ |
aaaade3f | 249 | hwif->tp_ops->exec_command(hwif, ATA_CMD_IDLEIMMEDIATE); |
1da177e4 LT |
250 | |
251 | rq->errors++; | |
252 | ||
253 | idescsi_end_request(drive, 0, 0); | |
254 | ||
255 | return ide_stopped; | |
256 | } | |
257 | ||
1da177e4 LT |
258 | static int idescsi_end_request (ide_drive_t *drive, int uptodate, int nrsecs) |
259 | { | |
260 | idescsi_scsi_t *scsi = drive_to_idescsi(drive); | |
261 | struct request *rq = HWGROUP(drive)->rq; | |
1c065787 | 262 | struct ide_atapi_pc *pc = (struct ide_atapi_pc *) rq->special; |
1da177e4 LT |
263 | int log = test_bit(IDESCSI_LOG_CMD, &scsi->log); |
264 | struct Scsi_Host *host; | |
32565347 | 265 | int errors = rq->errors; |
1da177e4 LT |
266 | unsigned long flags; |
267 | ||
4aff5e23 | 268 | if (!blk_special_request(rq) && !blk_sense_request(rq)) { |
1da177e4 LT |
269 | ide_end_request(drive, uptodate, nrsecs); |
270 | return 0; | |
271 | } | |
272 | ide_end_drive_cmd (drive, 0, 0); | |
4aff5e23 | 273 | if (blk_sense_request(rq)) { |
1c065787 | 274 | struct ide_atapi_pc *opc = (struct ide_atapi_pc *) rq->buffer; |
1da177e4 LT |
275 | if (log) { |
276 | printk ("ide-scsi: %s: wrap up check %lu, rst = ", drive->name, opc->scsi_cmd->serial_number); | |
1c065787 | 277 | ide_scsi_hex_dump(pc->buf, 16); |
1da177e4 | 278 | } |
1c065787 BP |
279 | memcpy((void *) opc->scsi_cmd->sense_buffer, pc->buf, |
280 | SCSI_SENSE_BUFFERSIZE); | |
281 | kfree(pc->buf); | |
1da177e4 | 282 | kfree(pc); |
e27420d0 | 283 | blk_put_request(rq); |
1da177e4 LT |
284 | pc = opc; |
285 | rq = pc->rq; | |
286 | pc->scsi_cmd->result = (CHECK_CONDITION << 1) | | |
e3bfae4c BP |
287 | (((pc->flags & PC_FLAG_TIMEDOUT) ? |
288 | DID_TIME_OUT : | |
289 | DID_OK) << 16); | |
290 | } else if (pc->flags & PC_FLAG_TIMEDOUT) { | |
1da177e4 LT |
291 | if (log) |
292 | printk (KERN_WARNING "ide-scsi: %s: timed out for %lu\n", | |
293 | drive->name, pc->scsi_cmd->serial_number); | |
294 | pc->scsi_cmd->result = DID_TIME_OUT << 16; | |
32565347 | 295 | } else if (errors >= ERROR_MAX) { |
1da177e4 LT |
296 | pc->scsi_cmd->result = DID_ERROR << 16; |
297 | if (log) | |
298 | printk ("ide-scsi: %s: I/O error for %lu\n", drive->name, pc->scsi_cmd->serial_number); | |
32565347 | 299 | } else if (errors) { |
1da177e4 LT |
300 | if (log) |
301 | printk ("ide-scsi: %s: check condition for %lu\n", drive->name, pc->scsi_cmd->serial_number); | |
302 | if (!idescsi_check_condition(drive, rq)) | |
303 | /* we started a request sense, so we'll be back, exit for now */ | |
304 | return 0; | |
305 | pc->scsi_cmd->result = (CHECK_CONDITION << 1) | (DID_OK << 16); | |
306 | } else { | |
307 | pc->scsi_cmd->result = DID_OK << 16; | |
1da177e4 LT |
308 | } |
309 | host = pc->scsi_cmd->device->host; | |
310 | spin_lock_irqsave(host->host_lock, flags); | |
311 | pc->done(pc->scsi_cmd); | |
312 | spin_unlock_irqrestore(host->host_lock, flags); | |
313 | kfree(pc); | |
e27420d0 | 314 | blk_put_request(rq); |
1da177e4 LT |
315 | scsi->pc = NULL; |
316 | return 0; | |
317 | } | |
318 | ||
1c065787 | 319 | static inline unsigned long get_timeout(struct ide_atapi_pc *pc) |
1da177e4 LT |
320 | { |
321 | return max_t(unsigned long, WAIT_CMD, pc->timeout - jiffies); | |
322 | } | |
323 | ||
324 | static int idescsi_expiry(ide_drive_t *drive) | |
325 | { | |
d1be0a82 | 326 | idescsi_scsi_t *scsi = drive_to_idescsi(drive); |
1c065787 | 327 | struct ide_atapi_pc *pc = scsi->pc; |
1da177e4 | 328 | |
43a2b5b2 BZ |
329 | debug_log("%s called for %lu at %lu\n", __func__, |
330 | pc->scsi_cmd->serial_number, jiffies); | |
331 | ||
e3bfae4c | 332 | pc->flags |= PC_FLAG_TIMEDOUT; |
1da177e4 LT |
333 | |
334 | return 0; /* we do not want the ide subsystem to retry */ | |
335 | } | |
336 | ||
337 | /* | |
338 | * Our interrupt handler. | |
339 | */ | |
340 | static ide_startstop_t idescsi_pc_intr (ide_drive_t *drive) | |
341 | { | |
342 | idescsi_scsi_t *scsi = drive_to_idescsi(drive); | |
1c065787 | 343 | struct ide_atapi_pc *pc = scsi->pc; |
1da177e4 | 344 | |
646c0cb6 BZ |
345 | return ide_pc_intr(drive, pc, idescsi_pc_intr, get_timeout(pc), |
346 | idescsi_expiry, NULL, NULL, NULL, | |
347 | ide_scsi_io_buffers); | |
1da177e4 LT |
348 | } |
349 | ||
350 | static ide_startstop_t idescsi_transfer_pc(ide_drive_t *drive) | |
351 | { | |
1da177e4 | 352 | idescsi_scsi_t *scsi = drive_to_idescsi(drive); |
c8c51129 | 353 | |
594c16d8 BZ |
354 | return ide_transfer_pc(drive, scsi->pc, idescsi_pc_intr, |
355 | get_timeout(scsi->pc), idescsi_expiry); | |
1da177e4 LT |
356 | } |
357 | ||
1c065787 | 358 | static inline int idescsi_set_direction(struct ide_atapi_pc *pc) |
1da177e4 LT |
359 | { |
360 | switch (pc->c[0]) { | |
361 | case READ_6: case READ_10: case READ_12: | |
e3bfae4c | 362 | pc->flags &= ~PC_FLAG_WRITING; |
1da177e4 LT |
363 | return 0; |
364 | case WRITE_6: case WRITE_10: case WRITE_12: | |
e3bfae4c | 365 | pc->flags |= PC_FLAG_WRITING; |
1da177e4 LT |
366 | return 0; |
367 | default: | |
368 | return 1; | |
369 | } | |
370 | } | |
371 | ||
1c065787 | 372 | static int idescsi_map_sg(ide_drive_t *drive, struct ide_atapi_pc *pc) |
1da177e4 LT |
373 | { |
374 | ide_hwif_t *hwif = drive->hwif; | |
375 | struct scatterlist *sg, *scsi_sg; | |
376 | int segments; | |
377 | ||
1c065787 | 378 | if (!pc->req_xfer || pc->req_xfer % 1024) |
1da177e4 LT |
379 | return 1; |
380 | ||
381 | if (idescsi_set_direction(pc)) | |
382 | return 1; | |
383 | ||
384 | sg = hwif->sg_table; | |
427d0bd4 BH |
385 | scsi_sg = scsi_sglist(pc->scsi_cmd); |
386 | segments = scsi_sg_count(pc->scsi_cmd); | |
1da177e4 LT |
387 | |
388 | if (segments > hwif->sg_max_nents) | |
389 | return 1; | |
390 | ||
427d0bd4 BH |
391 | hwif->sg_nents = segments; |
392 | memcpy(sg, scsi_sg, sizeof(*sg) * segments); | |
1da177e4 LT |
393 | |
394 | return 0; | |
395 | } | |
396 | ||
1c065787 BP |
397 | static ide_startstop_t idescsi_issue_pc(ide_drive_t *drive, |
398 | struct ide_atapi_pc *pc) | |
1da177e4 LT |
399 | { |
400 | idescsi_scsi_t *scsi = drive_to_idescsi(drive); | |
1da177e4 | 401 | |
1c065787 BP |
402 | /* Set the current packet command */ |
403 | scsi->pc = pc; | |
1da177e4 | 404 | |
6bf1641c BZ |
405 | return ide_issue_pc(drive, pc, idescsi_transfer_pc, |
406 | get_timeout(pc), idescsi_expiry); | |
1da177e4 LT |
407 | } |
408 | ||
409 | /* | |
410 | * idescsi_do_request is our request handling function. | |
411 | */ | |
412 | static ide_startstop_t idescsi_do_request (ide_drive_t *drive, struct request *rq, sector_t block) | |
413 | { | |
43a2b5b2 BZ |
414 | debug_log("dev: %s, cmd: %x, errors: %d\n", rq->rq_disk->disk_name, |
415 | rq->cmd[0], rq->errors); | |
416 | debug_log("sector: %ld, nr_sectors: %ld, current_nr_sectors: %d\n", | |
417 | rq->sector, rq->nr_sectors, rq->current_nr_sectors); | |
1da177e4 | 418 | |
4aff5e23 | 419 | if (blk_sense_request(rq) || blk_special_request(rq)) { |
4cc19689 BZ |
420 | struct ide_atapi_pc *pc = (struct ide_atapi_pc *)rq->special; |
421 | ||
422 | if (drive->using_dma && !idescsi_map_sg(drive, pc)) | |
423 | pc->flags |= PC_FLAG_DMA_OK; | |
424 | ||
425 | return idescsi_issue_pc(drive, pc); | |
1da177e4 LT |
426 | } |
427 | blk_dump_rq_flags(rq, "ide-scsi: unsup command"); | |
428 | idescsi_end_request (drive, 0, 0); | |
429 | return ide_stopped; | |
430 | } | |
431 | ||
7662d046 | 432 | #ifdef CONFIG_IDE_PROC_FS |
1da177e4 LT |
433 | static void idescsi_add_settings(ide_drive_t *drive) |
434 | { | |
435 | idescsi_scsi_t *scsi = drive_to_idescsi(drive); | |
436 | ||
437 | /* | |
1497943e | 438 | * drive setting name read/write data type min max mul_factor div_factor data pointer set function |
1da177e4 | 439 | */ |
1497943e BZ |
440 | ide_add_setting(drive, "bios_cyl", SETTING_RW, TYPE_INT, 0, 1023, 1, 1, &drive->bios_cyl, NULL); |
441 | ide_add_setting(drive, "bios_head", SETTING_RW, TYPE_BYTE, 0, 255, 1, 1, &drive->bios_head, NULL); | |
442 | ide_add_setting(drive, "bios_sect", SETTING_RW, TYPE_BYTE, 0, 63, 1, 1, &drive->bios_sect, NULL); | |
443 | ide_add_setting(drive, "transform", SETTING_RW, TYPE_INT, 0, 3, 1, 1, &scsi->transform, NULL); | |
444 | ide_add_setting(drive, "log", SETTING_RW, TYPE_INT, 0, 1, 1, 1, &scsi->log, NULL); | |
1da177e4 | 445 | } |
7662d046 BZ |
446 | #else |
447 | static inline void idescsi_add_settings(ide_drive_t *drive) { ; } | |
448 | #endif | |
1da177e4 LT |
449 | |
450 | /* | |
451 | * Driver initialization. | |
452 | */ | |
453 | static void idescsi_setup (ide_drive_t *drive, idescsi_scsi_t *scsi) | |
454 | { | |
4dde4492 | 455 | if ((drive->id[ATA_ID_CONFIG] & 0x0060) == 0x20) |
be4c916e | 456 | set_bit(IDE_AFLAG_DRQ_INTERRUPT, &drive->atapi_flags); |
1da177e4 LT |
457 | clear_bit(IDESCSI_SG_TRANSFORM, &scsi->transform); |
458 | #if IDESCSI_DEBUG_LOG | |
459 | set_bit(IDESCSI_LOG_CMD, &scsi->log); | |
460 | #endif /* IDESCSI_DEBUG_LOG */ | |
db9d2869 BP |
461 | |
462 | drive->pc_callback = ide_scsi_callback; | |
463 | ||
1da177e4 | 464 | idescsi_add_settings(drive); |
1da177e4 LT |
465 | } |
466 | ||
b62735d9 | 467 | static void ide_scsi_remove(ide_drive_t *drive) |
1da177e4 LT |
468 | { |
469 | struct Scsi_Host *scsihost = drive->driver_data; | |
470 | struct ide_scsi_obj *scsi = scsihost_to_idescsi(scsihost); | |
471 | struct gendisk *g = scsi->disk; | |
472 | ||
6fdea8db | 473 | scsi_remove_host(scsihost); |
7662d046 | 474 | ide_proc_unregister_driver(drive, scsi->driver); |
1da177e4 LT |
475 | |
476 | ide_unregister_region(g); | |
477 | ||
478 | drive->driver_data = NULL; | |
479 | g->private_data = NULL; | |
480 | put_disk(g); | |
481 | ||
1da177e4 | 482 | ide_scsi_put(scsi); |
f83cbc77 BZ |
483 | |
484 | drive->scsi = 0; | |
1da177e4 LT |
485 | } |
486 | ||
b62735d9 | 487 | static int ide_scsi_probe(ide_drive_t *); |
1da177e4 | 488 | |
ecfd80e4 | 489 | #ifdef CONFIG_IDE_PROC_FS |
1da177e4 LT |
490 | static ide_proc_entry_t idescsi_proc[] = { |
491 | { "capacity", S_IFREG|S_IRUGO, proc_ide_read_capacity, NULL }, | |
492 | { NULL, 0, NULL, NULL } | |
493 | }; | |
1da177e4 LT |
494 | #endif |
495 | ||
1da177e4 | 496 | static ide_driver_t idescsi_driver = { |
8604affd | 497 | .gen_driver = { |
4ef3b8f4 | 498 | .owner = THIS_MODULE, |
8604affd BZ |
499 | .name = "ide-scsi", |
500 | .bus = &ide_bus_type, | |
8604affd | 501 | }, |
b62735d9 MP |
502 | .probe = ide_scsi_probe, |
503 | .remove = ide_scsi_remove, | |
1da177e4 LT |
504 | .version = IDESCSI_VERSION, |
505 | .media = ide_scsi, | |
1da177e4 | 506 | .supports_dsc_overlap = 0, |
1da177e4 LT |
507 | .do_request = idescsi_do_request, |
508 | .end_request = idescsi_end_request, | |
509 | .error = idescsi_atapi_error, | |
7662d046 BZ |
510 | #ifdef CONFIG_IDE_PROC_FS |
511 | .proc = idescsi_proc, | |
512 | #endif | |
1da177e4 LT |
513 | }; |
514 | ||
515 | static int idescsi_ide_open(struct inode *inode, struct file *filp) | |
516 | { | |
517 | struct gendisk *disk = inode->i_bdev->bd_disk; | |
518 | struct ide_scsi_obj *scsi; | |
1da177e4 LT |
519 | |
520 | if (!(scsi = ide_scsi_get(disk))) | |
521 | return -ENXIO; | |
522 | ||
1da177e4 LT |
523 | return 0; |
524 | } | |
525 | ||
526 | static int idescsi_ide_release(struct inode *inode, struct file *filp) | |
527 | { | |
528 | struct gendisk *disk = inode->i_bdev->bd_disk; | |
529 | struct ide_scsi_obj *scsi = ide_scsi_g(disk); | |
1da177e4 LT |
530 | |
531 | ide_scsi_put(scsi); | |
532 | ||
533 | return 0; | |
534 | } | |
535 | ||
536 | static int idescsi_ide_ioctl(struct inode *inode, struct file *file, | |
537 | unsigned int cmd, unsigned long arg) | |
538 | { | |
539 | struct block_device *bdev = inode->i_bdev; | |
540 | struct ide_scsi_obj *scsi = ide_scsi_g(bdev->bd_disk); | |
541 | return generic_ide_ioctl(scsi->drive, file, bdev, cmd, arg); | |
542 | } | |
543 | ||
544 | static struct block_device_operations idescsi_ops = { | |
545 | .owner = THIS_MODULE, | |
546 | .open = idescsi_ide_open, | |
547 | .release = idescsi_ide_release, | |
548 | .ioctl = idescsi_ide_ioctl, | |
549 | }; | |
550 | ||
1da177e4 LT |
551 | static int idescsi_slave_configure(struct scsi_device * sdp) |
552 | { | |
553 | /* Configure detected device */ | |
427d0bd4 BH |
554 | sdp->use_10_for_rw = 1; |
555 | sdp->use_10_for_ms = 1; | |
1da177e4 LT |
556 | scsi_adjust_queue_depth(sdp, MSG_SIMPLE_TAG, sdp->host->cmd_per_lun); |
557 | return 0; | |
558 | } | |
559 | ||
560 | static const char *idescsi_info (struct Scsi_Host *host) | |
561 | { | |
562 | return "SCSI host adapter emulation for IDE ATAPI devices"; | |
563 | } | |
564 | ||
565 | static int idescsi_ioctl (struct scsi_device *dev, int cmd, void __user *arg) | |
566 | { | |
567 | idescsi_scsi_t *scsi = scsihost_to_idescsi(dev->host); | |
568 | ||
569 | if (cmd == SG_SET_TRANSFORM) { | |
570 | if (arg) | |
571 | set_bit(IDESCSI_SG_TRANSFORM, &scsi->transform); | |
572 | else | |
573 | clear_bit(IDESCSI_SG_TRANSFORM, &scsi->transform); | |
574 | return 0; | |
575 | } else if (cmd == SG_GET_TRANSFORM) | |
576 | return put_user(test_bit(IDESCSI_SG_TRANSFORM, &scsi->transform), (int __user *) arg); | |
577 | return -EINVAL; | |
578 | } | |
579 | ||
1da177e4 LT |
580 | static int idescsi_queue (struct scsi_cmnd *cmd, |
581 | void (*done)(struct scsi_cmnd *)) | |
582 | { | |
583 | struct Scsi_Host *host = cmd->device->host; | |
584 | idescsi_scsi_t *scsi = scsihost_to_idescsi(host); | |
585 | ide_drive_t *drive = scsi->drive; | |
586 | struct request *rq = NULL; | |
1c065787 | 587 | struct ide_atapi_pc *pc = NULL; |
e27420d0 | 588 | int write = cmd->sc_data_direction == DMA_TO_DEVICE; |
1da177e4 LT |
589 | |
590 | if (!drive) { | |
017560fc | 591 | scmd_printk (KERN_ERR, cmd, "drive not present\n"); |
1da177e4 LT |
592 | goto abort; |
593 | } | |
594 | scsi = drive_to_idescsi(drive); | |
1c065787 | 595 | pc = kmalloc(sizeof(struct ide_atapi_pc), GFP_ATOMIC); |
e27420d0 | 596 | rq = blk_get_request(drive->queue, write, GFP_ATOMIC); |
1da177e4 LT |
597 | if (rq == NULL || pc == NULL) { |
598 | printk (KERN_ERR "ide-scsi: %s: out of memory\n", drive->name); | |
599 | goto abort; | |
600 | } | |
601 | ||
602 | memset (pc->c, 0, 12); | |
603 | pc->flags = 0; | |
6c60bd8e BZ |
604 | if (cmd->sc_data_direction == DMA_TO_DEVICE) |
605 | pc->flags |= PC_FLAG_WRITING; | |
1da177e4 LT |
606 | pc->rq = rq; |
607 | memcpy (pc->c, cmd->cmnd, cmd->cmd_len); | |
1c065787 | 608 | pc->buf = NULL; |
427d0bd4 | 609 | pc->sg = scsi_sglist(cmd); |
c79d88b7 | 610 | pc->sg_cnt = scsi_sg_count(cmd); |
1da177e4 | 611 | pc->b_count = 0; |
1c065787 | 612 | pc->req_xfer = pc->buf_size = scsi_bufflen(cmd); |
1da177e4 LT |
613 | pc->scsi_cmd = cmd; |
614 | pc->done = done; | |
242f9dcb | 615 | pc->timeout = jiffies + cmd->request->timeout; |
1da177e4 | 616 | |
1da177e4 LT |
617 | if (test_bit(IDESCSI_LOG_CMD, &scsi->log)) { |
618 | printk ("ide-scsi: %s: que %lu, cmd = ", drive->name, cmd->serial_number); | |
69ae6fee | 619 | ide_scsi_hex_dump(cmd->cmnd, cmd->cmd_len); |
1da177e4 LT |
620 | if (memcmp(pc->c, cmd->cmnd, cmd->cmd_len)) { |
621 | printk ("ide-scsi: %s: que %lu, tsl = ", drive->name, cmd->serial_number); | |
69ae6fee | 622 | ide_scsi_hex_dump(pc->c, 12); |
1da177e4 LT |
623 | } |
624 | } | |
625 | ||
1da177e4 | 626 | rq->special = (char *) pc; |
4aff5e23 | 627 | rq->cmd_type = REQ_TYPE_SPECIAL; |
1da177e4 | 628 | spin_unlock_irq(host->host_lock); |
e27420d0 | 629 | rq->ref_count++; |
08feacf3 | 630 | memcpy(rq->cmd, pc->c, 12); |
7e12ca11 | 631 | blk_execute_rq_nowait(drive->queue, scsi->disk, rq, 0, NULL); |
1da177e4 LT |
632 | spin_lock_irq(host->host_lock); |
633 | return 0; | |
634 | abort: | |
c9475cb0 | 635 | kfree (pc); |
e27420d0 FT |
636 | if (rq) |
637 | blk_put_request(rq); | |
1da177e4 LT |
638 | cmd->result = DID_ERROR << 16; |
639 | done(cmd); | |
640 | return 0; | |
641 | } | |
642 | ||
643 | static int idescsi_eh_abort (struct scsi_cmnd *cmd) | |
644 | { | |
645 | idescsi_scsi_t *scsi = scsihost_to_idescsi(cmd->device->host); | |
646 | ide_drive_t *drive = scsi->drive; | |
647 | int busy; | |
648 | int ret = FAILED; | |
649 | ||
650 | /* In idescsi_eh_abort we try to gently pry our command from the ide subsystem */ | |
651 | ||
652 | if (test_bit(IDESCSI_LOG_CMD, &scsi->log)) | |
653 | printk (KERN_WARNING "ide-scsi: abort called for %lu\n", cmd->serial_number); | |
654 | ||
655 | if (!drive) { | |
656 | printk (KERN_WARNING "ide-scsi: Drive not set in idescsi_eh_abort\n"); | |
657 | WARN_ON(1); | |
658 | goto no_drive; | |
659 | } | |
660 | ||
661 | /* First give it some more time, how much is "right" is hard to say :-( */ | |
662 | ||
663 | busy = ide_wait_not_busy(HWIF(drive), 100); /* FIXME - uses mdelay which causes latency? */ | |
664 | if (test_bit(IDESCSI_LOG_CMD, &scsi->log)) | |
665 | printk (KERN_WARNING "ide-scsi: drive did%s become ready\n", busy?" not":""); | |
666 | ||
667 | spin_lock_irq(&ide_lock); | |
668 | ||
669 | /* If there is no pc running we're done (our interrupt took care of it) */ | |
670 | if (!scsi->pc) { | |
671 | ret = SUCCESS; | |
672 | goto ide_unlock; | |
673 | } | |
674 | ||
675 | /* It's somewhere in flight. Does ide subsystem agree? */ | |
676 | if (scsi->pc->scsi_cmd->serial_number == cmd->serial_number && !busy && | |
677 | elv_queue_empty(drive->queue) && HWGROUP(drive)->rq != scsi->pc->rq) { | |
678 | /* | |
679 | * FIXME - not sure this condition can ever occur | |
680 | */ | |
681 | printk (KERN_ERR "ide-scsi: cmd aborted!\n"); | |
682 | ||
4aff5e23 | 683 | if (blk_sense_request(scsi->pc->rq)) |
1c065787 | 684 | kfree(scsi->pc->buf); |
e27420d0 FT |
685 | /* we need to call blk_put_request twice. */ |
686 | blk_put_request(scsi->pc->rq); | |
687 | blk_put_request(scsi->pc->rq); | |
1da177e4 LT |
688 | kfree(scsi->pc); |
689 | scsi->pc = NULL; | |
690 | ||
691 | ret = SUCCESS; | |
692 | } | |
693 | ||
694 | ide_unlock: | |
695 | spin_unlock_irq(&ide_lock); | |
696 | no_drive: | |
697 | if (test_bit(IDESCSI_LOG_CMD, &scsi->log)) | |
698 | printk (KERN_WARNING "ide-scsi: abort returns %s\n", ret == SUCCESS?"success":"failed"); | |
699 | ||
700 | return ret; | |
701 | } | |
702 | ||
703 | static int idescsi_eh_reset (struct scsi_cmnd *cmd) | |
704 | { | |
705 | struct request *req; | |
706 | idescsi_scsi_t *scsi = scsihost_to_idescsi(cmd->device->host); | |
707 | ide_drive_t *drive = scsi->drive; | |
708 | int ready = 0; | |
709 | int ret = SUCCESS; | |
710 | ||
711 | /* In idescsi_eh_reset we forcefully remove the command from the ide subsystem and reset the device. */ | |
712 | ||
713 | if (test_bit(IDESCSI_LOG_CMD, &scsi->log)) | |
714 | printk (KERN_WARNING "ide-scsi: reset called for %lu\n", cmd->serial_number); | |
715 | ||
716 | if (!drive) { | |
717 | printk (KERN_WARNING "ide-scsi: Drive not set in idescsi_eh_reset\n"); | |
718 | WARN_ON(1); | |
719 | return FAILED; | |
720 | } | |
721 | ||
df0ae249 JG |
722 | spin_lock_irq(cmd->device->host->host_lock); |
723 | spin_lock(&ide_lock); | |
1da177e4 LT |
724 | |
725 | if (!scsi->pc || (req = scsi->pc->rq) != HWGROUP(drive)->rq || !HWGROUP(drive)->handler) { | |
726 | printk (KERN_WARNING "ide-scsi: No active request in idescsi_eh_reset\n"); | |
727 | spin_unlock(&ide_lock); | |
df0ae249 | 728 | spin_unlock_irq(cmd->device->host->host_lock); |
1da177e4 LT |
729 | return FAILED; |
730 | } | |
731 | ||
732 | /* kill current request */ | |
5a330e39 KU |
733 | if (__blk_end_request(req, -EIO, 0)) |
734 | BUG(); | |
4aff5e23 | 735 | if (blk_sense_request(req)) |
1c065787 | 736 | kfree(scsi->pc->buf); |
1da177e4 LT |
737 | kfree(scsi->pc); |
738 | scsi->pc = NULL; | |
e27420d0 | 739 | blk_put_request(req); |
1da177e4 LT |
740 | |
741 | /* now nuke the drive queue */ | |
742 | while ((req = elv_next_request(drive->queue))) { | |
5a330e39 KU |
743 | if (__blk_end_request(req, -EIO, 0)) |
744 | BUG(); | |
1da177e4 LT |
745 | } |
746 | ||
747 | HWGROUP(drive)->rq = NULL; | |
748 | HWGROUP(drive)->handler = NULL; | |
749 | HWGROUP(drive)->busy = 1; /* will set this to zero when ide reset finished */ | |
df0ae249 | 750 | spin_unlock(&ide_lock); |
1da177e4 LT |
751 | |
752 | ide_do_reset(drive); | |
753 | ||
754 | /* ide_do_reset starts a polling handler which restarts itself every 50ms until the reset finishes */ | |
755 | ||
756 | do { | |
1da177e4 | 757 | spin_unlock_irq(cmd->device->host->host_lock); |
df0ae249 | 758 | msleep(50); |
1da177e4 LT |
759 | spin_lock_irq(cmd->device->host->host_lock); |
760 | } while ( HWGROUP(drive)->handler ); | |
761 | ||
762 | ready = drive_is_ready(drive); | |
763 | HWGROUP(drive)->busy--; | |
764 | if (!ready) { | |
765 | printk (KERN_ERR "ide-scsi: reset failed!\n"); | |
766 | ret = FAILED; | |
767 | } | |
768 | ||
df0ae249 | 769 | spin_unlock_irq(cmd->device->host->host_lock); |
1da177e4 LT |
770 | return ret; |
771 | } | |
772 | ||
773 | static int idescsi_bios(struct scsi_device *sdev, struct block_device *bdev, | |
774 | sector_t capacity, int *parm) | |
775 | { | |
776 | idescsi_scsi_t *idescsi = scsihost_to_idescsi(sdev->host); | |
777 | ide_drive_t *drive = idescsi->drive; | |
778 | ||
779 | if (drive->bios_cyl && drive->bios_head && drive->bios_sect) { | |
780 | parm[0] = drive->bios_head; | |
781 | parm[1] = drive->bios_sect; | |
782 | parm[2] = drive->bios_cyl; | |
783 | } | |
784 | return 0; | |
785 | } | |
786 | ||
787 | static struct scsi_host_template idescsi_template = { | |
788 | .module = THIS_MODULE, | |
789 | .name = "idescsi", | |
790 | .info = idescsi_info, | |
791 | .slave_configure = idescsi_slave_configure, | |
792 | .ioctl = idescsi_ioctl, | |
793 | .queuecommand = idescsi_queue, | |
794 | .eh_abort_handler = idescsi_eh_abort, | |
795 | .eh_host_reset_handler = idescsi_eh_reset, | |
796 | .bios_param = idescsi_bios, | |
797 | .can_queue = 40, | |
798 | .this_id = -1, | |
799 | .sg_tablesize = 256, | |
800 | .cmd_per_lun = 5, | |
801 | .max_sectors = 128, | |
802 | .use_clustering = DISABLE_CLUSTERING, | |
803 | .emulated = 1, | |
804 | .proc_name = "ide-scsi", | |
805 | }; | |
806 | ||
b62735d9 | 807 | static int ide_scsi_probe(ide_drive_t *drive) |
1da177e4 LT |
808 | { |
809 | idescsi_scsi_t *idescsi; | |
810 | struct Scsi_Host *host; | |
811 | struct gendisk *g; | |
812 | static int warned; | |
813 | int err = -ENOMEM; | |
4dde4492 | 814 | u16 last_lun; |
1da177e4 LT |
815 | |
816 | if (!warned && drive->media == ide_cdrom) { | |
817 | printk(KERN_WARNING "ide-scsi is deprecated for cd burning! Use ide-cd and give dev=/dev/hdX as device\n"); | |
818 | warned = 1; | |
819 | } | |
820 | ||
aaeab80b AC |
821 | if (idescsi_nocd && drive->media == ide_cdrom) |
822 | return -ENODEV; | |
823 | ||
1da177e4 LT |
824 | if (!strstr("ide-scsi", drive->driver_req) || |
825 | !drive->present || | |
826 | drive->media == ide_disk || | |
827 | !(host = scsi_host_alloc(&idescsi_template,sizeof(idescsi_scsi_t)))) | |
8604affd | 828 | return -ENODEV; |
1da177e4 | 829 | |
f83cbc77 BZ |
830 | drive->scsi = 1; |
831 | ||
1da177e4 LT |
832 | g = alloc_disk(1 << PARTN_BITS); |
833 | if (!g) | |
834 | goto out_host_put; | |
835 | ||
836 | ide_init_disk(g, drive); | |
837 | ||
838 | host->max_id = 1; | |
839 | ||
4dde4492 BZ |
840 | last_lun = drive->id[ATA_ID_LAST_LUN]; |
841 | if (last_lun) | |
842 | debug_log("%s: last_lun=%u\n", drive->name, last_lun); | |
43a2b5b2 | 843 | |
4dde4492 BZ |
844 | if ((last_lun & 7) != 7) |
845 | host->max_lun = (last_lun & 7) + 1; | |
1da177e4 LT |
846 | else |
847 | host->max_lun = 1; | |
848 | ||
849 | drive->driver_data = host; | |
850 | idescsi = scsihost_to_idescsi(host); | |
851 | idescsi->drive = drive; | |
852 | idescsi->driver = &idescsi_driver; | |
853 | idescsi->host = host; | |
854 | idescsi->disk = g; | |
855 | g->private_data = &idescsi->driver; | |
7662d046 | 856 | ide_proc_register_driver(drive, &idescsi_driver); |
8604affd BZ |
857 | err = 0; |
858 | idescsi_setup(drive, idescsi); | |
859 | g->fops = &idescsi_ops; | |
860 | ide_register_region(g); | |
861 | err = scsi_add_host(host, &drive->gendev); | |
1da177e4 | 862 | if (!err) { |
8604affd BZ |
863 | scsi_scan_host(host); |
864 | return 0; | |
1da177e4 | 865 | } |
8604affd BZ |
866 | /* fall through on error */ |
867 | ide_unregister_region(g); | |
7662d046 | 868 | ide_proc_unregister_driver(drive, &idescsi_driver); |
1da177e4 LT |
869 | |
870 | put_disk(g); | |
871 | out_host_put: | |
f83cbc77 | 872 | drive->scsi = 0; |
1da177e4 LT |
873 | scsi_host_put(host); |
874 | return err; | |
875 | } | |
876 | ||
877 | static int __init init_idescsi_module(void) | |
878 | { | |
8604affd | 879 | return driver_register(&idescsi_driver.gen_driver); |
1da177e4 LT |
880 | } |
881 | ||
882 | static void __exit exit_idescsi_module(void) | |
883 | { | |
8604affd | 884 | driver_unregister(&idescsi_driver.gen_driver); |
1da177e4 LT |
885 | } |
886 | ||
aaeab80b AC |
887 | module_param(idescsi_nocd, int, 0600); |
888 | MODULE_PARM_DESC(idescsi_nocd, "Disable handling of CD-ROMs so they may be driven by ide-cd"); | |
1da177e4 LT |
889 | module_init(init_idescsi_module); |
890 | module_exit(exit_idescsi_module); | |
891 | MODULE_LICENSE("GPL"); |