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Commit | Line | Data |
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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) { |
1da177e4 | 105 | scsi_host_get(scsi->host); |
08da591e BZ |
106 | if (ide_device_get(scsi->drive)) { |
107 | scsi_host_put(scsi->host); | |
108 | scsi = NULL; | |
109 | } | |
110 | } | |
e723ccd8 | 111 | mutex_unlock(&idescsi_ref_mutex); |
1da177e4 LT |
112 | return scsi; |
113 | } | |
114 | ||
115 | static void ide_scsi_put(struct ide_scsi_obj *scsi) | |
116 | { | |
e723ccd8 | 117 | mutex_lock(&idescsi_ref_mutex); |
08da591e | 118 | ide_device_put(scsi->drive); |
1da177e4 | 119 | scsi_host_put(scsi->host); |
e723ccd8 | 120 | mutex_unlock(&idescsi_ref_mutex); |
1da177e4 LT |
121 | } |
122 | ||
123 | static inline idescsi_scsi_t *scsihost_to_idescsi(struct Scsi_Host *host) | |
124 | { | |
125 | return (idescsi_scsi_t*) (&host[1]); | |
126 | } | |
127 | ||
128 | static inline idescsi_scsi_t *drive_to_idescsi(ide_drive_t *ide_drive) | |
129 | { | |
130 | return scsihost_to_idescsi(ide_drive->driver_data); | |
131 | } | |
132 | ||
1da177e4 | 133 | /* |
3e52fb4d | 134 | * PIO data transfer routine using the scatter gather table. |
1da177e4 | 135 | */ |
3e52fb4d BZ |
136 | static void ide_scsi_io_buffers(ide_drive_t *drive, struct ide_atapi_pc *pc, |
137 | unsigned int bcount, int write) | |
1da177e4 | 138 | { |
9567b349 | 139 | ide_hwif_t *hwif = drive->hwif; |
374e042c BZ |
140 | const struct ide_tp_ops *tp_ops = hwif->tp_ops; |
141 | xfer_func_t *xf = write ? tp_ops->output_data : tp_ops->input_data; | |
1da177e4 | 142 | char *buf; |
1da177e4 | 143 | int count; |
1da177e4 LT |
144 | |
145 | while (bcount) { | |
1da177e4 | 146 | count = min(pc->sg->length - pc->b_count, bcount); |
45711f1a | 147 | if (PageHighMem(sg_page(pc->sg))) { |
a717f773 AM |
148 | unsigned long flags; |
149 | ||
150 | local_irq_save(flags); | |
45711f1a | 151 | buf = kmap_atomic(sg_page(pc->sg), KM_IRQ0) + |
3e52fb4d BZ |
152 | pc->sg->offset; |
153 | xf(drive, NULL, buf + pc->b_count, count); | |
a717f773 AM |
154 | kunmap_atomic(buf - pc->sg->offset, KM_IRQ0); |
155 | local_irq_restore(flags); | |
156 | } else { | |
45711f1a | 157 | buf = sg_virt(pc->sg); |
3e52fb4d | 158 | xf(drive, NULL, buf + pc->b_count, count); |
a717f773 AM |
159 | } |
160 | bcount -= count; pc->b_count += count; | |
1da177e4 | 161 | if (pc->b_count == pc->sg->length) { |
c79d88b7 | 162 | if (!--pc->sg_cnt) |
d274a987 JA |
163 | break; |
164 | pc->sg = sg_next(pc->sg); | |
1da177e4 LT |
165 | pc->b_count = 0; |
166 | } | |
167 | } | |
d274a987 JA |
168 | |
169 | if (bcount) { | |
3e52fb4d BZ |
170 | printk(KERN_ERR "%s: scatter gather table too small, %s\n", |
171 | drive->name, write ? "padding with zeros" | |
172 | : "discarding data"); | |
173 | ide_pad_transfer(drive, write, bcount); | |
d274a987 | 174 | } |
1da177e4 LT |
175 | } |
176 | ||
69ae6fee BZ |
177 | static void ide_scsi_hex_dump(u8 *data, int len) |
178 | { | |
179 | print_hex_dump(KERN_CONT, "", DUMP_PREFIX_NONE, 16, 1, data, len, 0); | |
180 | } | |
181 | ||
c6b2d260 BZ |
182 | static int idescsi_end_request(ide_drive_t *, int, int); |
183 | ||
184 | static void ide_scsi_callback(ide_drive_t *drive) | |
185 | { | |
186 | idescsi_scsi_t *scsi = drive_to_idescsi(drive); | |
187 | struct ide_atapi_pc *pc = scsi->pc; | |
188 | ||
189 | if (pc->flags & PC_FLAG_TIMEDOUT) | |
190 | debug_log("%s: got timed out packet %lu at %lu\n", __func__, | |
191 | pc->scsi_cmd->serial_number, jiffies); | |
192 | /* end this request now - scsi should retry it*/ | |
193 | else if (test_bit(IDESCSI_LOG_CMD, &scsi->log)) | |
194 | printk(KERN_INFO "Packet command completed, %d bytes" | |
195 | " transferred\n", pc->xferred); | |
196 | ||
197 | idescsi_end_request(drive, 1, 0); | |
198 | } | |
199 | ||
1c065787 BP |
200 | static int idescsi_check_condition(ide_drive_t *drive, |
201 | struct request *failed_cmd) | |
1da177e4 LT |
202 | { |
203 | idescsi_scsi_t *scsi = drive_to_idescsi(drive); | |
1c065787 | 204 | struct ide_atapi_pc *pc; |
1da177e4 LT |
205 | struct request *rq; |
206 | u8 *buf; | |
207 | ||
208 | /* stuff a sense request in front of our current request */ | |
1c065787 | 209 | pc = kzalloc(sizeof(struct ide_atapi_pc), GFP_ATOMIC); |
e27420d0 | 210 | rq = blk_get_request(drive->queue, READ, GFP_ATOMIC); |
41ead3c9 MK |
211 | buf = kzalloc(SCSI_SENSE_BUFFERSIZE, GFP_ATOMIC); |
212 | if (!pc || !rq || !buf) { | |
c9475cb0 | 213 | kfree(buf); |
e27420d0 FT |
214 | if (rq) |
215 | blk_put_request(rq); | |
c9475cb0 | 216 | kfree(pc); |
1da177e4 LT |
217 | return -ENOMEM; |
218 | } | |
1da177e4 LT |
219 | rq->special = (char *) pc; |
220 | pc->rq = rq; | |
1c065787 | 221 | pc->buf = buf; |
1da177e4 | 222 | pc->c[0] = REQUEST_SENSE; |
1c065787 | 223 | pc->c[4] = pc->req_xfer = pc->buf_size = SCSI_SENSE_BUFFERSIZE; |
4aff5e23 | 224 | rq->cmd_type = REQ_TYPE_SENSE; |
e8a96aa7 | 225 | rq->cmd_flags |= REQ_PREEMPT; |
1da177e4 LT |
226 | pc->timeout = jiffies + WAIT_READY; |
227 | /* NOTE! Save the failed packet command in "rq->buffer" */ | |
1c065787 BP |
228 | rq->buffer = (void *) failed_cmd->special; |
229 | pc->scsi_cmd = ((struct ide_atapi_pc *) failed_cmd->special)->scsi_cmd; | |
1da177e4 LT |
230 | if (test_bit(IDESCSI_LOG_CMD, &scsi->log)) { |
231 | printk ("ide-scsi: %s: queue cmd = ", drive->name); | |
69ae6fee | 232 | ide_scsi_hex_dump(pc->c, 6); |
1da177e4 LT |
233 | } |
234 | rq->rq_disk = scsi->disk; | |
e27420d0 | 235 | rq->ref_count++; |
08feacf3 | 236 | memcpy(rq->cmd, pc->c, 12); |
63f5abb0 FT |
237 | ide_do_drive_cmd(drive, rq); |
238 | return 0; | |
1da177e4 LT |
239 | } |
240 | ||
1da177e4 LT |
241 | static ide_startstop_t |
242 | idescsi_atapi_error(ide_drive_t *drive, struct request *rq, u8 stat, u8 err) | |
243 | { | |
23579a2a BZ |
244 | ide_hwif_t *hwif = drive->hwif; |
245 | ||
374e042c | 246 | if (hwif->tp_ops->read_status(hwif) & (BUSY_STAT | DRQ_STAT)) |
1da177e4 | 247 | /* force an abort */ |
374e042c | 248 | hwif->tp_ops->exec_command(hwif, WIN_IDLEIMMEDIATE); |
1da177e4 LT |
249 | |
250 | rq->errors++; | |
251 | ||
252 | idescsi_end_request(drive, 0, 0); | |
253 | ||
254 | return ide_stopped; | |
255 | } | |
256 | ||
1da177e4 LT |
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 | 281 | kfree(pc); |
e27420d0 | 282 | blk_put_request(rq); |
1da177e4 LT |
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); | |
e27420d0 | 313 | blk_put_request(rq); |
1da177e4 LT |
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); | |
1c065787 | 342 | struct ide_atapi_pc *pc = scsi->pc; |
1da177e4 | 343 | |
646c0cb6 BZ |
344 | return ide_pc_intr(drive, pc, idescsi_pc_intr, get_timeout(pc), |
345 | idescsi_expiry, NULL, NULL, NULL, | |
346 | ide_scsi_io_buffers); | |
1da177e4 LT |
347 | } |
348 | ||
349 | static ide_startstop_t idescsi_transfer_pc(ide_drive_t *drive) | |
350 | { | |
1da177e4 | 351 | idescsi_scsi_t *scsi = drive_to_idescsi(drive); |
c8c51129 | 352 | |
594c16d8 BZ |
353 | return ide_transfer_pc(drive, scsi->pc, idescsi_pc_intr, |
354 | get_timeout(scsi->pc), idescsi_expiry); | |
1da177e4 LT |
355 | } |
356 | ||
1c065787 | 357 | static inline int idescsi_set_direction(struct ide_atapi_pc *pc) |
1da177e4 LT |
358 | { |
359 | switch (pc->c[0]) { | |
360 | case READ_6: case READ_10: case READ_12: | |
e3bfae4c | 361 | pc->flags &= ~PC_FLAG_WRITING; |
1da177e4 LT |
362 | return 0; |
363 | case WRITE_6: case WRITE_10: case WRITE_12: | |
e3bfae4c | 364 | pc->flags |= PC_FLAG_WRITING; |
1da177e4 LT |
365 | return 0; |
366 | default: | |
367 | return 1; | |
368 | } | |
369 | } | |
370 | ||
1c065787 | 371 | static int idescsi_map_sg(ide_drive_t *drive, struct ide_atapi_pc *pc) |
1da177e4 LT |
372 | { |
373 | ide_hwif_t *hwif = drive->hwif; | |
374 | struct scatterlist *sg, *scsi_sg; | |
375 | int segments; | |
376 | ||
1c065787 | 377 | if (!pc->req_xfer || pc->req_xfer % 1024) |
1da177e4 LT |
378 | return 1; |
379 | ||
380 | if (idescsi_set_direction(pc)) | |
381 | return 1; | |
382 | ||
383 | sg = hwif->sg_table; | |
427d0bd4 BH |
384 | scsi_sg = scsi_sglist(pc->scsi_cmd); |
385 | segments = scsi_sg_count(pc->scsi_cmd); | |
1da177e4 LT |
386 | |
387 | if (segments > hwif->sg_max_nents) | |
388 | return 1; | |
389 | ||
427d0bd4 BH |
390 | hwif->sg_nents = segments; |
391 | memcpy(sg, scsi_sg, sizeof(*sg) * segments); | |
1da177e4 LT |
392 | |
393 | return 0; | |
394 | } | |
395 | ||
1c065787 BP |
396 | static ide_startstop_t idescsi_issue_pc(ide_drive_t *drive, |
397 | struct ide_atapi_pc *pc) | |
1da177e4 LT |
398 | { |
399 | idescsi_scsi_t *scsi = drive_to_idescsi(drive); | |
1da177e4 | 400 | |
1c065787 BP |
401 | /* Set the current packet command */ |
402 | scsi->pc = pc; | |
1da177e4 | 403 | |
6bf1641c BZ |
404 | return ide_issue_pc(drive, pc, idescsi_transfer_pc, |
405 | get_timeout(pc), idescsi_expiry); | |
1da177e4 LT |
406 | } |
407 | ||
408 | /* | |
409 | * idescsi_do_request is our request handling function. | |
410 | */ | |
411 | static ide_startstop_t idescsi_do_request (ide_drive_t *drive, struct request *rq, sector_t block) | |
412 | { | |
43a2b5b2 BZ |
413 | debug_log("dev: %s, cmd: %x, errors: %d\n", rq->rq_disk->disk_name, |
414 | rq->cmd[0], rq->errors); | |
415 | debug_log("sector: %ld, nr_sectors: %ld, current_nr_sectors: %d\n", | |
416 | rq->sector, rq->nr_sectors, rq->current_nr_sectors); | |
1da177e4 | 417 | |
4aff5e23 | 418 | if (blk_sense_request(rq) || blk_special_request(rq)) { |
4cc19689 BZ |
419 | struct ide_atapi_pc *pc = (struct ide_atapi_pc *)rq->special; |
420 | ||
421 | if (drive->using_dma && !idescsi_map_sg(drive, pc)) | |
422 | pc->flags |= PC_FLAG_DMA_OK; | |
423 | ||
424 | return idescsi_issue_pc(drive, pc); | |
1da177e4 LT |
425 | } |
426 | blk_dump_rq_flags(rq, "ide-scsi: unsup command"); | |
427 | idescsi_end_request (drive, 0, 0); | |
428 | return ide_stopped; | |
429 | } | |
430 | ||
7662d046 | 431 | #ifdef CONFIG_IDE_PROC_FS |
1da177e4 LT |
432 | static void idescsi_add_settings(ide_drive_t *drive) |
433 | { | |
434 | idescsi_scsi_t *scsi = drive_to_idescsi(drive); | |
435 | ||
436 | /* | |
1497943e | 437 | * drive setting name read/write data type min max mul_factor div_factor data pointer set function |
1da177e4 | 438 | */ |
1497943e BZ |
439 | ide_add_setting(drive, "bios_cyl", SETTING_RW, TYPE_INT, 0, 1023, 1, 1, &drive->bios_cyl, NULL); |
440 | ide_add_setting(drive, "bios_head", SETTING_RW, TYPE_BYTE, 0, 255, 1, 1, &drive->bios_head, NULL); | |
441 | ide_add_setting(drive, "bios_sect", SETTING_RW, TYPE_BYTE, 0, 63, 1, 1, &drive->bios_sect, NULL); | |
442 | ide_add_setting(drive, "transform", SETTING_RW, TYPE_INT, 0, 3, 1, 1, &scsi->transform, NULL); | |
443 | ide_add_setting(drive, "log", SETTING_RW, TYPE_INT, 0, 1, 1, 1, &scsi->log, NULL); | |
1da177e4 | 444 | } |
7662d046 BZ |
445 | #else |
446 | static inline void idescsi_add_settings(ide_drive_t *drive) { ; } | |
447 | #endif | |
1da177e4 LT |
448 | |
449 | /* | |
450 | * Driver initialization. | |
451 | */ | |
452 | static void idescsi_setup (ide_drive_t *drive, idescsi_scsi_t *scsi) | |
453 | { | |
1da177e4 | 454 | if (drive->id && (drive->id->config & 0x0060) == 0x20) |
be4c916e | 455 | set_bit(IDE_AFLAG_DRQ_INTERRUPT, &drive->atapi_flags); |
1da177e4 LT |
456 | clear_bit(IDESCSI_SG_TRANSFORM, &scsi->transform); |
457 | #if IDESCSI_DEBUG_LOG | |
458 | set_bit(IDESCSI_LOG_CMD, &scsi->log); | |
459 | #endif /* IDESCSI_DEBUG_LOG */ | |
db9d2869 BP |
460 | |
461 | drive->pc_callback = ide_scsi_callback; | |
462 | ||
1da177e4 | 463 | idescsi_add_settings(drive); |
1da177e4 LT |
464 | } |
465 | ||
b62735d9 | 466 | static void ide_scsi_remove(ide_drive_t *drive) |
1da177e4 LT |
467 | { |
468 | struct Scsi_Host *scsihost = drive->driver_data; | |
469 | struct ide_scsi_obj *scsi = scsihost_to_idescsi(scsihost); | |
470 | struct gendisk *g = scsi->disk; | |
471 | ||
6fdea8db | 472 | scsi_remove_host(scsihost); |
7662d046 | 473 | ide_proc_unregister_driver(drive, scsi->driver); |
1da177e4 LT |
474 | |
475 | ide_unregister_region(g); | |
476 | ||
477 | drive->driver_data = NULL; | |
478 | g->private_data = NULL; | |
479 | put_disk(g); | |
480 | ||
1da177e4 | 481 | ide_scsi_put(scsi); |
f83cbc77 BZ |
482 | |
483 | drive->scsi = 0; | |
1da177e4 LT |
484 | } |
485 | ||
b62735d9 | 486 | static int ide_scsi_probe(ide_drive_t *); |
1da177e4 | 487 | |
ecfd80e4 | 488 | #ifdef CONFIG_IDE_PROC_FS |
1da177e4 LT |
489 | static ide_proc_entry_t idescsi_proc[] = { |
490 | { "capacity", S_IFREG|S_IRUGO, proc_ide_read_capacity, NULL }, | |
491 | { NULL, 0, NULL, NULL } | |
492 | }; | |
1da177e4 LT |
493 | #endif |
494 | ||
1da177e4 | 495 | static ide_driver_t idescsi_driver = { |
8604affd | 496 | .gen_driver = { |
4ef3b8f4 | 497 | .owner = THIS_MODULE, |
8604affd BZ |
498 | .name = "ide-scsi", |
499 | .bus = &ide_bus_type, | |
8604affd | 500 | }, |
b62735d9 MP |
501 | .probe = ide_scsi_probe, |
502 | .remove = ide_scsi_remove, | |
1da177e4 LT |
503 | .version = IDESCSI_VERSION, |
504 | .media = ide_scsi, | |
1da177e4 | 505 | .supports_dsc_overlap = 0, |
1da177e4 LT |
506 | .do_request = idescsi_do_request, |
507 | .end_request = idescsi_end_request, | |
508 | .error = idescsi_atapi_error, | |
7662d046 BZ |
509 | #ifdef CONFIG_IDE_PROC_FS |
510 | .proc = idescsi_proc, | |
511 | #endif | |
1da177e4 LT |
512 | }; |
513 | ||
514 | static int idescsi_ide_open(struct inode *inode, struct file *filp) | |
515 | { | |
516 | struct gendisk *disk = inode->i_bdev->bd_disk; | |
517 | struct ide_scsi_obj *scsi; | |
1da177e4 LT |
518 | |
519 | if (!(scsi = ide_scsi_get(disk))) | |
520 | return -ENXIO; | |
521 | ||
1da177e4 LT |
522 | return 0; |
523 | } | |
524 | ||
525 | static int idescsi_ide_release(struct inode *inode, struct file *filp) | |
526 | { | |
527 | struct gendisk *disk = inode->i_bdev->bd_disk; | |
528 | struct ide_scsi_obj *scsi = ide_scsi_g(disk); | |
1da177e4 LT |
529 | |
530 | ide_scsi_put(scsi); | |
531 | ||
532 | return 0; | |
533 | } | |
534 | ||
535 | static int idescsi_ide_ioctl(struct inode *inode, struct file *file, | |
536 | unsigned int cmd, unsigned long arg) | |
537 | { | |
538 | struct block_device *bdev = inode->i_bdev; | |
539 | struct ide_scsi_obj *scsi = ide_scsi_g(bdev->bd_disk); | |
540 | return generic_ide_ioctl(scsi->drive, file, bdev, cmd, arg); | |
541 | } | |
542 | ||
543 | static struct block_device_operations idescsi_ops = { | |
544 | .owner = THIS_MODULE, | |
545 | .open = idescsi_ide_open, | |
546 | .release = idescsi_ide_release, | |
547 | .ioctl = idescsi_ide_ioctl, | |
548 | }; | |
549 | ||
1da177e4 LT |
550 | static int idescsi_slave_configure(struct scsi_device * sdp) |
551 | { | |
552 | /* Configure detected device */ | |
427d0bd4 BH |
553 | sdp->use_10_for_rw = 1; |
554 | sdp->use_10_for_ms = 1; | |
1da177e4 LT |
555 | scsi_adjust_queue_depth(sdp, MSG_SIMPLE_TAG, sdp->host->cmd_per_lun); |
556 | return 0; | |
557 | } | |
558 | ||
559 | static const char *idescsi_info (struct Scsi_Host *host) | |
560 | { | |
561 | return "SCSI host adapter emulation for IDE ATAPI devices"; | |
562 | } | |
563 | ||
564 | static int idescsi_ioctl (struct scsi_device *dev, int cmd, void __user *arg) | |
565 | { | |
566 | idescsi_scsi_t *scsi = scsihost_to_idescsi(dev->host); | |
567 | ||
568 | if (cmd == SG_SET_TRANSFORM) { | |
569 | if (arg) | |
570 | set_bit(IDESCSI_SG_TRANSFORM, &scsi->transform); | |
571 | else | |
572 | clear_bit(IDESCSI_SG_TRANSFORM, &scsi->transform); | |
573 | return 0; | |
574 | } else if (cmd == SG_GET_TRANSFORM) | |
575 | return put_user(test_bit(IDESCSI_SG_TRANSFORM, &scsi->transform), (int __user *) arg); | |
576 | return -EINVAL; | |
577 | } | |
578 | ||
1da177e4 LT |
579 | static int idescsi_queue (struct scsi_cmnd *cmd, |
580 | void (*done)(struct scsi_cmnd *)) | |
581 | { | |
582 | struct Scsi_Host *host = cmd->device->host; | |
583 | idescsi_scsi_t *scsi = scsihost_to_idescsi(host); | |
584 | ide_drive_t *drive = scsi->drive; | |
585 | struct request *rq = NULL; | |
1c065787 | 586 | struct ide_atapi_pc *pc = NULL; |
e27420d0 | 587 | int write = cmd->sc_data_direction == DMA_TO_DEVICE; |
1da177e4 LT |
588 | |
589 | if (!drive) { | |
017560fc | 590 | scmd_printk (KERN_ERR, cmd, "drive not present\n"); |
1da177e4 LT |
591 | goto abort; |
592 | } | |
593 | scsi = drive_to_idescsi(drive); | |
1c065787 | 594 | pc = kmalloc(sizeof(struct ide_atapi_pc), GFP_ATOMIC); |
e27420d0 | 595 | rq = blk_get_request(drive->queue, write, GFP_ATOMIC); |
1da177e4 LT |
596 | if (rq == NULL || pc == NULL) { |
597 | printk (KERN_ERR "ide-scsi: %s: out of memory\n", drive->name); | |
598 | goto abort; | |
599 | } | |
600 | ||
601 | memset (pc->c, 0, 12); | |
602 | pc->flags = 0; | |
6c60bd8e BZ |
603 | if (cmd->sc_data_direction == DMA_TO_DEVICE) |
604 | pc->flags |= PC_FLAG_WRITING; | |
1da177e4 LT |
605 | pc->rq = rq; |
606 | memcpy (pc->c, cmd->cmnd, cmd->cmd_len); | |
1c065787 | 607 | pc->buf = NULL; |
427d0bd4 | 608 | pc->sg = scsi_sglist(cmd); |
c79d88b7 | 609 | pc->sg_cnt = scsi_sg_count(cmd); |
1da177e4 | 610 | pc->b_count = 0; |
1c065787 | 611 | pc->req_xfer = pc->buf_size = scsi_bufflen(cmd); |
1da177e4 LT |
612 | pc->scsi_cmd = cmd; |
613 | pc->done = done; | |
614 | pc->timeout = jiffies + cmd->timeout_per_command; | |
615 | ||
1da177e4 LT |
616 | if (test_bit(IDESCSI_LOG_CMD, &scsi->log)) { |
617 | printk ("ide-scsi: %s: que %lu, cmd = ", drive->name, cmd->serial_number); | |
69ae6fee | 618 | ide_scsi_hex_dump(cmd->cmnd, cmd->cmd_len); |
1da177e4 LT |
619 | if (memcmp(pc->c, cmd->cmnd, cmd->cmd_len)) { |
620 | printk ("ide-scsi: %s: que %lu, tsl = ", drive->name, cmd->serial_number); | |
69ae6fee | 621 | ide_scsi_hex_dump(pc->c, 12); |
1da177e4 LT |
622 | } |
623 | } | |
624 | ||
1da177e4 | 625 | rq->special = (char *) pc; |
4aff5e23 | 626 | rq->cmd_type = REQ_TYPE_SPECIAL; |
1da177e4 | 627 | spin_unlock_irq(host->host_lock); |
e27420d0 | 628 | rq->ref_count++; |
08feacf3 | 629 | memcpy(rq->cmd, pc->c, 12); |
7e12ca11 | 630 | blk_execute_rq_nowait(drive->queue, scsi->disk, rq, 0, NULL); |
1da177e4 LT |
631 | spin_lock_irq(host->host_lock); |
632 | return 0; | |
633 | abort: | |
c9475cb0 | 634 | kfree (pc); |
e27420d0 FT |
635 | if (rq) |
636 | blk_put_request(rq); | |
1da177e4 LT |
637 | cmd->result = DID_ERROR << 16; |
638 | done(cmd); | |
639 | return 0; | |
640 | } | |
641 | ||
642 | static int idescsi_eh_abort (struct scsi_cmnd *cmd) | |
643 | { | |
644 | idescsi_scsi_t *scsi = scsihost_to_idescsi(cmd->device->host); | |
645 | ide_drive_t *drive = scsi->drive; | |
646 | int busy; | |
647 | int ret = FAILED; | |
648 | ||
649 | /* In idescsi_eh_abort we try to gently pry our command from the ide subsystem */ | |
650 | ||
651 | if (test_bit(IDESCSI_LOG_CMD, &scsi->log)) | |
652 | printk (KERN_WARNING "ide-scsi: abort called for %lu\n", cmd->serial_number); | |
653 | ||
654 | if (!drive) { | |
655 | printk (KERN_WARNING "ide-scsi: Drive not set in idescsi_eh_abort\n"); | |
656 | WARN_ON(1); | |
657 | goto no_drive; | |
658 | } | |
659 | ||
660 | /* First give it some more time, how much is "right" is hard to say :-( */ | |
661 | ||
662 | busy = ide_wait_not_busy(HWIF(drive), 100); /* FIXME - uses mdelay which causes latency? */ | |
663 | if (test_bit(IDESCSI_LOG_CMD, &scsi->log)) | |
664 | printk (KERN_WARNING "ide-scsi: drive did%s become ready\n", busy?" not":""); | |
665 | ||
666 | spin_lock_irq(&ide_lock); | |
667 | ||
668 | /* If there is no pc running we're done (our interrupt took care of it) */ | |
669 | if (!scsi->pc) { | |
670 | ret = SUCCESS; | |
671 | goto ide_unlock; | |
672 | } | |
673 | ||
674 | /* It's somewhere in flight. Does ide subsystem agree? */ | |
675 | if (scsi->pc->scsi_cmd->serial_number == cmd->serial_number && !busy && | |
676 | elv_queue_empty(drive->queue) && HWGROUP(drive)->rq != scsi->pc->rq) { | |
677 | /* | |
678 | * FIXME - not sure this condition can ever occur | |
679 | */ | |
680 | printk (KERN_ERR "ide-scsi: cmd aborted!\n"); | |
681 | ||
4aff5e23 | 682 | if (blk_sense_request(scsi->pc->rq)) |
1c065787 | 683 | kfree(scsi->pc->buf); |
e27420d0 FT |
684 | /* we need to call blk_put_request twice. */ |
685 | blk_put_request(scsi->pc->rq); | |
686 | blk_put_request(scsi->pc->rq); | |
1da177e4 LT |
687 | kfree(scsi->pc); |
688 | scsi->pc = NULL; | |
689 | ||
690 | ret = SUCCESS; | |
691 | } | |
692 | ||
693 | ide_unlock: | |
694 | spin_unlock_irq(&ide_lock); | |
695 | no_drive: | |
696 | if (test_bit(IDESCSI_LOG_CMD, &scsi->log)) | |
697 | printk (KERN_WARNING "ide-scsi: abort returns %s\n", ret == SUCCESS?"success":"failed"); | |
698 | ||
699 | return ret; | |
700 | } | |
701 | ||
702 | static int idescsi_eh_reset (struct scsi_cmnd *cmd) | |
703 | { | |
704 | struct request *req; | |
705 | idescsi_scsi_t *scsi = scsihost_to_idescsi(cmd->device->host); | |
706 | ide_drive_t *drive = scsi->drive; | |
707 | int ready = 0; | |
708 | int ret = SUCCESS; | |
709 | ||
710 | /* In idescsi_eh_reset we forcefully remove the command from the ide subsystem and reset the device. */ | |
711 | ||
712 | if (test_bit(IDESCSI_LOG_CMD, &scsi->log)) | |
713 | printk (KERN_WARNING "ide-scsi: reset called for %lu\n", cmd->serial_number); | |
714 | ||
715 | if (!drive) { | |
716 | printk (KERN_WARNING "ide-scsi: Drive not set in idescsi_eh_reset\n"); | |
717 | WARN_ON(1); | |
718 | return FAILED; | |
719 | } | |
720 | ||
df0ae249 JG |
721 | spin_lock_irq(cmd->device->host->host_lock); |
722 | spin_lock(&ide_lock); | |
1da177e4 LT |
723 | |
724 | if (!scsi->pc || (req = scsi->pc->rq) != HWGROUP(drive)->rq || !HWGROUP(drive)->handler) { | |
725 | printk (KERN_WARNING "ide-scsi: No active request in idescsi_eh_reset\n"); | |
726 | spin_unlock(&ide_lock); | |
df0ae249 | 727 | spin_unlock_irq(cmd->device->host->host_lock); |
1da177e4 LT |
728 | return FAILED; |
729 | } | |
730 | ||
731 | /* kill current request */ | |
5a330e39 KU |
732 | if (__blk_end_request(req, -EIO, 0)) |
733 | BUG(); | |
4aff5e23 | 734 | if (blk_sense_request(req)) |
1c065787 | 735 | kfree(scsi->pc->buf); |
1da177e4 LT |
736 | kfree(scsi->pc); |
737 | scsi->pc = NULL; | |
e27420d0 | 738 | blk_put_request(req); |
1da177e4 LT |
739 | |
740 | /* now nuke the drive queue */ | |
741 | while ((req = elv_next_request(drive->queue))) { | |
5a330e39 KU |
742 | if (__blk_end_request(req, -EIO, 0)) |
743 | BUG(); | |
1da177e4 LT |
744 | } |
745 | ||
746 | HWGROUP(drive)->rq = NULL; | |
747 | HWGROUP(drive)->handler = NULL; | |
748 | HWGROUP(drive)->busy = 1; /* will set this to zero when ide reset finished */ | |
df0ae249 | 749 | spin_unlock(&ide_lock); |
1da177e4 LT |
750 | |
751 | ide_do_reset(drive); | |
752 | ||
753 | /* ide_do_reset starts a polling handler which restarts itself every 50ms until the reset finishes */ | |
754 | ||
755 | do { | |
1da177e4 | 756 | spin_unlock_irq(cmd->device->host->host_lock); |
df0ae249 | 757 | msleep(50); |
1da177e4 LT |
758 | spin_lock_irq(cmd->device->host->host_lock); |
759 | } while ( HWGROUP(drive)->handler ); | |
760 | ||
761 | ready = drive_is_ready(drive); | |
762 | HWGROUP(drive)->busy--; | |
763 | if (!ready) { | |
764 | printk (KERN_ERR "ide-scsi: reset failed!\n"); | |
765 | ret = FAILED; | |
766 | } | |
767 | ||
df0ae249 | 768 | spin_unlock_irq(cmd->device->host->host_lock); |
1da177e4 LT |
769 | return ret; |
770 | } | |
771 | ||
772 | static int idescsi_bios(struct scsi_device *sdev, struct block_device *bdev, | |
773 | sector_t capacity, int *parm) | |
774 | { | |
775 | idescsi_scsi_t *idescsi = scsihost_to_idescsi(sdev->host); | |
776 | ide_drive_t *drive = idescsi->drive; | |
777 | ||
778 | if (drive->bios_cyl && drive->bios_head && drive->bios_sect) { | |
779 | parm[0] = drive->bios_head; | |
780 | parm[1] = drive->bios_sect; | |
781 | parm[2] = drive->bios_cyl; | |
782 | } | |
783 | return 0; | |
784 | } | |
785 | ||
786 | static struct scsi_host_template idescsi_template = { | |
787 | .module = THIS_MODULE, | |
788 | .name = "idescsi", | |
789 | .info = idescsi_info, | |
790 | .slave_configure = idescsi_slave_configure, | |
791 | .ioctl = idescsi_ioctl, | |
792 | .queuecommand = idescsi_queue, | |
793 | .eh_abort_handler = idescsi_eh_abort, | |
794 | .eh_host_reset_handler = idescsi_eh_reset, | |
795 | .bios_param = idescsi_bios, | |
796 | .can_queue = 40, | |
797 | .this_id = -1, | |
798 | .sg_tablesize = 256, | |
799 | .cmd_per_lun = 5, | |
800 | .max_sectors = 128, | |
801 | .use_clustering = DISABLE_CLUSTERING, | |
802 | .emulated = 1, | |
803 | .proc_name = "ide-scsi", | |
804 | }; | |
805 | ||
b62735d9 | 806 | static int ide_scsi_probe(ide_drive_t *drive) |
1da177e4 LT |
807 | { |
808 | idescsi_scsi_t *idescsi; | |
809 | struct Scsi_Host *host; | |
810 | struct gendisk *g; | |
811 | static int warned; | |
812 | int err = -ENOMEM; | |
813 | ||
814 | if (!warned && drive->media == ide_cdrom) { | |
815 | printk(KERN_WARNING "ide-scsi is deprecated for cd burning! Use ide-cd and give dev=/dev/hdX as device\n"); | |
816 | warned = 1; | |
817 | } | |
818 | ||
aaeab80b AC |
819 | if (idescsi_nocd && drive->media == ide_cdrom) |
820 | return -ENODEV; | |
821 | ||
1da177e4 LT |
822 | if (!strstr("ide-scsi", drive->driver_req) || |
823 | !drive->present || | |
824 | drive->media == ide_disk || | |
825 | !(host = scsi_host_alloc(&idescsi_template,sizeof(idescsi_scsi_t)))) | |
8604affd | 826 | return -ENODEV; |
1da177e4 | 827 | |
f83cbc77 BZ |
828 | drive->scsi = 1; |
829 | ||
1da177e4 LT |
830 | g = alloc_disk(1 << PARTN_BITS); |
831 | if (!g) | |
832 | goto out_host_put; | |
833 | ||
834 | ide_init_disk(g, drive); | |
835 | ||
836 | host->max_id = 1; | |
837 | ||
1da177e4 | 838 | if (drive->id->last_lun) |
43a2b5b2 BZ |
839 | debug_log("%s: id->last_lun=%u\n", drive->name, |
840 | drive->id->last_lun); | |
841 | ||
1da177e4 LT |
842 | if ((drive->id->last_lun & 0x7) != 7) |
843 | host->max_lun = (drive->id->last_lun & 0x7) + 1; | |
844 | else | |
845 | host->max_lun = 1; | |
846 | ||
847 | drive->driver_data = host; | |
848 | idescsi = scsihost_to_idescsi(host); | |
849 | idescsi->drive = drive; | |
850 | idescsi->driver = &idescsi_driver; | |
851 | idescsi->host = host; | |
852 | idescsi->disk = g; | |
853 | g->private_data = &idescsi->driver; | |
7662d046 | 854 | ide_proc_register_driver(drive, &idescsi_driver); |
8604affd BZ |
855 | err = 0; |
856 | idescsi_setup(drive, idescsi); | |
857 | g->fops = &idescsi_ops; | |
858 | ide_register_region(g); | |
859 | err = scsi_add_host(host, &drive->gendev); | |
1da177e4 | 860 | if (!err) { |
8604affd BZ |
861 | scsi_scan_host(host); |
862 | return 0; | |
1da177e4 | 863 | } |
8604affd BZ |
864 | /* fall through on error */ |
865 | ide_unregister_region(g); | |
7662d046 | 866 | ide_proc_unregister_driver(drive, &idescsi_driver); |
1da177e4 LT |
867 | |
868 | put_disk(g); | |
869 | out_host_put: | |
f83cbc77 | 870 | drive->scsi = 0; |
1da177e4 LT |
871 | scsi_host_put(host); |
872 | return err; | |
873 | } | |
874 | ||
875 | static int __init init_idescsi_module(void) | |
876 | { | |
8604affd | 877 | return driver_register(&idescsi_driver.gen_driver); |
1da177e4 LT |
878 | } |
879 | ||
880 | static void __exit exit_idescsi_module(void) | |
881 | { | |
8604affd | 882 | driver_unregister(&idescsi_driver.gen_driver); |
1da177e4 LT |
883 | } |
884 | ||
aaeab80b AC |
885 | module_param(idescsi_nocd, int, 0600); |
886 | MODULE_PARM_DESC(idescsi_nocd, "Disable handling of CD-ROMs so they may be driven by ide-cd"); | |
1da177e4 LT |
887 | module_init(init_idescsi_module); |
888 | module_exit(exit_idescsi_module); | |
889 | MODULE_LICENSE("GPL"); |