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c6131fa5 GU |
1 | /* |
2 | * PS3 Disk Storage Driver | |
3 | * | |
4 | * Copyright (C) 2007 Sony Computer Entertainment Inc. | |
5 | * Copyright 2007 Sony Corp. | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify it | |
8 | * under the terms of the GNU General Public License as published | |
9 | * by the Free Software Foundation; version 2 of the License. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, but | |
12 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
14 | * General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License along | |
17 | * with this program; if not, write to the Free Software Foundation, Inc., | |
18 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. | |
19 | */ | |
20 | ||
21 | #include <linux/ata.h> | |
22 | #include <linux/blkdev.h> | |
23 | ||
24 | #include <asm/lv1call.h> | |
25 | #include <asm/ps3stor.h> | |
26 | #include <asm/firmware.h> | |
27 | ||
28 | ||
29 | #define DEVICE_NAME "ps3disk" | |
30 | ||
31 | #define BOUNCE_SIZE (64*1024) | |
32 | ||
33 | #define PS3DISK_MAX_DISKS 16 | |
34 | #define PS3DISK_MINORS 16 | |
35 | ||
36 | ||
37 | #define PS3DISK_NAME "ps3d%c" | |
38 | ||
39 | ||
40 | struct ps3disk_private { | |
41 | spinlock_t lock; /* Request queue spinlock */ | |
42 | struct request_queue *queue; | |
43 | struct gendisk *gendisk; | |
44 | unsigned int blocking_factor; | |
45 | struct request *req; | |
46 | u64 raw_capacity; | |
47 | unsigned char model[ATA_ID_PROD_LEN+1]; | |
48 | }; | |
49 | ||
50 | ||
51 | #define LV1_STORAGE_SEND_ATA_COMMAND (2) | |
52 | #define LV1_STORAGE_ATA_HDDOUT (0x23) | |
53 | ||
54 | struct lv1_ata_cmnd_block { | |
55 | u16 features; | |
56 | u16 sector_count; | |
57 | u16 LBA_low; | |
58 | u16 LBA_mid; | |
59 | u16 LBA_high; | |
60 | u8 device; | |
61 | u8 command; | |
62 | u32 is_ext; | |
63 | u32 proto; | |
64 | u32 in_out; | |
65 | u32 size; | |
66 | u64 buffer; | |
67 | u32 arglen; | |
68 | }; | |
69 | ||
70 | enum lv1_ata_proto { | |
71 | NON_DATA_PROTO = 0, | |
72 | PIO_DATA_IN_PROTO = 1, | |
73 | PIO_DATA_OUT_PROTO = 2, | |
74 | DMA_PROTO = 3 | |
75 | }; | |
76 | ||
77 | enum lv1_ata_in_out { | |
78 | DIR_WRITE = 0, /* memory -> device */ | |
79 | DIR_READ = 1 /* device -> memory */ | |
80 | }; | |
81 | ||
82 | static int ps3disk_major; | |
83 | ||
84 | ||
85 | static struct block_device_operations ps3disk_fops = { | |
86 | .owner = THIS_MODULE, | |
87 | }; | |
88 | ||
89 | ||
90 | static void ps3disk_scatter_gather(struct ps3_storage_device *dev, | |
91 | struct request *req, int gather) | |
92 | { | |
93 | unsigned int offset = 0; | |
5705f702 | 94 | struct req_iterator iter; |
c6131fa5 | 95 | struct bio_vec *bvec; |
5705f702 | 96 | unsigned int i = 0; |
c6131fa5 GU |
97 | size_t size; |
98 | void *buf; | |
99 | ||
5705f702 N |
100 | rq_for_each_segment(bvec, req, iter) { |
101 | unsigned long flags; | |
c6131fa5 GU |
102 | dev_dbg(&dev->sbd.core, |
103 | "%s:%u: bio %u: %u segs %u sectors from %lu\n", | |
5705f702 N |
104 | __func__, __LINE__, i, bio_segments(iter.bio), |
105 | bio_sectors(iter.bio), | |
106 | (unsigned long)iter.bio->bi_sector); | |
107 | ||
6c92e699 JA |
108 | size = bvec->bv_len; |
109 | buf = bvec_kmap_irq(bvec, &flags); | |
110 | if (gather) | |
111 | memcpy(dev->bounce_buf+offset, buf, size); | |
112 | else | |
113 | memcpy(buf, dev->bounce_buf+offset, size); | |
114 | offset += size; | |
115 | flush_kernel_dcache_page(bvec->bv_page); | |
116 | bvec_kunmap_irq(bvec, &flags); | |
c6131fa5 GU |
117 | i++; |
118 | } | |
119 | } | |
120 | ||
121 | static int ps3disk_submit_request_sg(struct ps3_storage_device *dev, | |
122 | struct request *req) | |
123 | { | |
124 | struct ps3disk_private *priv = dev->sbd.core.driver_data; | |
125 | int write = rq_data_dir(req), res; | |
126 | const char *op = write ? "write" : "read"; | |
127 | u64 start_sector, sectors; | |
128 | unsigned int region_id = dev->regions[dev->region_idx].id; | |
129 | ||
130 | #ifdef DEBUG | |
131 | unsigned int n = 0; | |
5705f702 N |
132 | struct bio_vec *bv; |
133 | struct req_iterator iter; | |
c6131fa5 | 134 | |
5705f702 | 135 | rq_for_each_segment(bv, req, iter) |
c6131fa5 GU |
136 | n++; |
137 | dev_dbg(&dev->sbd.core, | |
5705f702 | 138 | "%s:%u: %s req has %u bvecs for %lu sectors %lu hard sectors\n", |
c6131fa5 GU |
139 | __func__, __LINE__, op, n, req->nr_sectors, |
140 | req->hard_nr_sectors); | |
141 | #endif | |
142 | ||
143 | start_sector = req->sector * priv->blocking_factor; | |
144 | sectors = req->nr_sectors * priv->blocking_factor; | |
145 | dev_dbg(&dev->sbd.core, "%s:%u: %s %lu sectors starting at %lu\n", | |
146 | __func__, __LINE__, op, sectors, start_sector); | |
147 | ||
148 | if (write) { | |
149 | ps3disk_scatter_gather(dev, req, 1); | |
150 | ||
151 | res = lv1_storage_write(dev->sbd.dev_id, region_id, | |
152 | start_sector, sectors, 0, | |
153 | dev->bounce_lpar, &dev->tag); | |
154 | } else { | |
155 | res = lv1_storage_read(dev->sbd.dev_id, region_id, | |
156 | start_sector, sectors, 0, | |
157 | dev->bounce_lpar, &dev->tag); | |
158 | } | |
159 | if (res) { | |
160 | dev_err(&dev->sbd.core, "%s:%u: %s failed %d\n", __func__, | |
161 | __LINE__, op, res); | |
162 | end_request(req, 0); | |
163 | return 0; | |
164 | } | |
165 | ||
166 | priv->req = req; | |
167 | return 1; | |
168 | } | |
169 | ||
170 | static int ps3disk_submit_flush_request(struct ps3_storage_device *dev, | |
171 | struct request *req) | |
172 | { | |
173 | struct ps3disk_private *priv = dev->sbd.core.driver_data; | |
174 | u64 res; | |
175 | ||
176 | dev_dbg(&dev->sbd.core, "%s:%u: flush request\n", __func__, __LINE__); | |
177 | ||
178 | res = lv1_storage_send_device_command(dev->sbd.dev_id, | |
179 | LV1_STORAGE_ATA_HDDOUT, 0, 0, 0, | |
180 | 0, &dev->tag); | |
181 | if (res) { | |
182 | dev_err(&dev->sbd.core, "%s:%u: sync cache failed 0x%lx\n", | |
183 | __func__, __LINE__, res); | |
184 | end_request(req, 0); | |
185 | return 0; | |
186 | } | |
187 | ||
188 | priv->req = req; | |
189 | return 1; | |
190 | } | |
191 | ||
192 | static void ps3disk_do_request(struct ps3_storage_device *dev, | |
165125e1 | 193 | struct request_queue *q) |
c6131fa5 GU |
194 | { |
195 | struct request *req; | |
196 | ||
197 | dev_dbg(&dev->sbd.core, "%s:%u\n", __func__, __LINE__); | |
198 | ||
199 | while ((req = elv_next_request(q))) { | |
200 | if (blk_fs_request(req)) { | |
201 | if (ps3disk_submit_request_sg(dev, req)) | |
202 | break; | |
203 | } else if (req->cmd_type == REQ_TYPE_FLUSH) { | |
204 | if (ps3disk_submit_flush_request(dev, req)) | |
205 | break; | |
206 | } else { | |
207 | blk_dump_rq_flags(req, DEVICE_NAME " bad request"); | |
208 | end_request(req, 0); | |
209 | continue; | |
210 | } | |
211 | } | |
212 | } | |
213 | ||
165125e1 | 214 | static void ps3disk_request(struct request_queue *q) |
c6131fa5 GU |
215 | { |
216 | struct ps3_storage_device *dev = q->queuedata; | |
217 | struct ps3disk_private *priv = dev->sbd.core.driver_data; | |
218 | ||
219 | if (priv->req) { | |
220 | dev_dbg(&dev->sbd.core, "%s:%u busy\n", __func__, __LINE__); | |
221 | return; | |
222 | } | |
223 | ||
224 | ps3disk_do_request(dev, q); | |
225 | } | |
226 | ||
227 | static irqreturn_t ps3disk_interrupt(int irq, void *data) | |
228 | { | |
229 | struct ps3_storage_device *dev = data; | |
230 | struct ps3disk_private *priv; | |
231 | struct request *req; | |
232 | int res, read, uptodate; | |
233 | u64 tag, status; | |
234 | unsigned long num_sectors; | |
235 | const char *op; | |
236 | ||
237 | res = lv1_storage_get_async_status(dev->sbd.dev_id, &tag, &status); | |
238 | ||
239 | if (tag != dev->tag) | |
240 | dev_err(&dev->sbd.core, | |
241 | "%s:%u: tag mismatch, got %lx, expected %lx\n", | |
242 | __func__, __LINE__, tag, dev->tag); | |
243 | ||
244 | if (res) { | |
245 | dev_err(&dev->sbd.core, "%s:%u: res=%d status=0x%lx\n", | |
246 | __func__, __LINE__, res, status); | |
247 | return IRQ_HANDLED; | |
248 | } | |
249 | ||
250 | priv = dev->sbd.core.driver_data; | |
251 | req = priv->req; | |
252 | if (!req) { | |
253 | dev_dbg(&dev->sbd.core, | |
254 | "%s:%u non-block layer request completed\n", __func__, | |
255 | __LINE__); | |
256 | dev->lv1_status = status; | |
257 | complete(&dev->done); | |
258 | return IRQ_HANDLED; | |
259 | } | |
260 | ||
261 | if (req->cmd_type == REQ_TYPE_FLUSH) { | |
262 | read = 0; | |
263 | num_sectors = req->hard_cur_sectors; | |
264 | op = "flush"; | |
265 | } else { | |
266 | read = !rq_data_dir(req); | |
267 | num_sectors = req->nr_sectors; | |
268 | op = read ? "read" : "write"; | |
269 | } | |
270 | if (status) { | |
271 | dev_dbg(&dev->sbd.core, "%s:%u: %s failed 0x%lx\n", __func__, | |
272 | __LINE__, op, status); | |
273 | uptodate = 0; | |
274 | } else { | |
275 | dev_dbg(&dev->sbd.core, "%s:%u: %s completed\n", __func__, | |
276 | __LINE__, op); | |
277 | uptodate = 1; | |
278 | if (read) | |
279 | ps3disk_scatter_gather(dev, req, 0); | |
280 | } | |
281 | ||
282 | spin_lock(&priv->lock); | |
283 | if (!end_that_request_first(req, uptodate, num_sectors)) { | |
284 | add_disk_randomness(req->rq_disk); | |
285 | blkdev_dequeue_request(req); | |
286 | end_that_request_last(req, uptodate); | |
287 | } | |
288 | priv->req = NULL; | |
289 | ps3disk_do_request(dev, priv->queue); | |
290 | spin_unlock(&priv->lock); | |
291 | ||
292 | return IRQ_HANDLED; | |
293 | } | |
294 | ||
295 | static int ps3disk_sync_cache(struct ps3_storage_device *dev) | |
296 | { | |
297 | u64 res; | |
298 | ||
299 | dev_dbg(&dev->sbd.core, "%s:%u: sync cache\n", __func__, __LINE__); | |
300 | ||
301 | res = ps3stor_send_command(dev, LV1_STORAGE_ATA_HDDOUT, 0, 0, 0, 0); | |
302 | if (res) { | |
303 | dev_err(&dev->sbd.core, "%s:%u: sync cache failed 0x%lx\n", | |
304 | __func__, __LINE__, res); | |
305 | return -EIO; | |
306 | } | |
307 | return 0; | |
308 | } | |
309 | ||
310 | ||
311 | /* ATA helpers copied from drivers/ata/libata-core.c */ | |
312 | ||
313 | static void swap_buf_le16(u16 *buf, unsigned int buf_words) | |
314 | { | |
315 | #ifdef __BIG_ENDIAN | |
316 | unsigned int i; | |
317 | ||
318 | for (i = 0; i < buf_words; i++) | |
319 | buf[i] = le16_to_cpu(buf[i]); | |
320 | #endif /* __BIG_ENDIAN */ | |
321 | } | |
322 | ||
323 | static u64 ata_id_n_sectors(const u16 *id) | |
324 | { | |
325 | if (ata_id_has_lba(id)) { | |
326 | if (ata_id_has_lba48(id)) | |
327 | return ata_id_u64(id, 100); | |
328 | else | |
329 | return ata_id_u32(id, 60); | |
330 | } else { | |
331 | if (ata_id_current_chs_valid(id)) | |
332 | return ata_id_u32(id, 57); | |
333 | else | |
334 | return id[1] * id[3] * id[6]; | |
335 | } | |
336 | } | |
337 | ||
338 | static void ata_id_string(const u16 *id, unsigned char *s, unsigned int ofs, | |
339 | unsigned int len) | |
340 | { | |
341 | unsigned int c; | |
342 | ||
343 | while (len > 0) { | |
344 | c = id[ofs] >> 8; | |
345 | *s = c; | |
346 | s++; | |
347 | ||
348 | c = id[ofs] & 0xff; | |
349 | *s = c; | |
350 | s++; | |
351 | ||
352 | ofs++; | |
353 | len -= 2; | |
354 | } | |
355 | } | |
356 | ||
357 | static void ata_id_c_string(const u16 *id, unsigned char *s, unsigned int ofs, | |
358 | unsigned int len) | |
359 | { | |
360 | unsigned char *p; | |
361 | ||
362 | WARN_ON(!(len & 1)); | |
363 | ||
364 | ata_id_string(id, s, ofs, len - 1); | |
365 | ||
366 | p = s + strnlen(s, len - 1); | |
367 | while (p > s && p[-1] == ' ') | |
368 | p--; | |
369 | *p = '\0'; | |
370 | } | |
371 | ||
372 | static int ps3disk_identify(struct ps3_storage_device *dev) | |
373 | { | |
374 | struct ps3disk_private *priv = dev->sbd.core.driver_data; | |
375 | struct lv1_ata_cmnd_block ata_cmnd; | |
376 | u16 *id = dev->bounce_buf; | |
377 | u64 res; | |
378 | ||
379 | dev_dbg(&dev->sbd.core, "%s:%u: identify disk\n", __func__, __LINE__); | |
380 | ||
381 | memset(&ata_cmnd, 0, sizeof(struct lv1_ata_cmnd_block)); | |
382 | ata_cmnd.command = ATA_CMD_ID_ATA; | |
383 | ata_cmnd.sector_count = 1; | |
384 | ata_cmnd.size = ata_cmnd.arglen = ATA_ID_WORDS * 2; | |
385 | ata_cmnd.buffer = dev->bounce_lpar; | |
386 | ata_cmnd.proto = PIO_DATA_IN_PROTO; | |
387 | ata_cmnd.in_out = DIR_READ; | |
388 | ||
389 | res = ps3stor_send_command(dev, LV1_STORAGE_SEND_ATA_COMMAND, | |
390 | ps3_mm_phys_to_lpar(__pa(&ata_cmnd)), | |
391 | sizeof(ata_cmnd), ata_cmnd.buffer, | |
392 | ata_cmnd.arglen); | |
393 | if (res) { | |
394 | dev_err(&dev->sbd.core, "%s:%u: identify disk failed 0x%lx\n", | |
395 | __func__, __LINE__, res); | |
396 | return -EIO; | |
397 | } | |
398 | ||
399 | swap_buf_le16(id, ATA_ID_WORDS); | |
400 | ||
401 | /* All we're interested in are raw capacity and model name */ | |
402 | priv->raw_capacity = ata_id_n_sectors(id); | |
403 | ata_id_c_string(id, priv->model, ATA_ID_PROD, sizeof(priv->model)); | |
404 | return 0; | |
405 | } | |
406 | ||
165125e1 | 407 | static void ps3disk_prepare_flush(struct request_queue *q, struct request *req) |
c6131fa5 GU |
408 | { |
409 | struct ps3_storage_device *dev = q->queuedata; | |
410 | ||
411 | dev_dbg(&dev->sbd.core, "%s:%u\n", __func__, __LINE__); | |
412 | ||
413 | memset(req->cmd, 0, sizeof(req->cmd)); | |
414 | req->cmd_type = REQ_TYPE_FLUSH; | |
415 | } | |
416 | ||
c6131fa5 GU |
417 | static unsigned long ps3disk_mask; |
418 | ||
419 | static DEFINE_MUTEX(ps3disk_mask_mutex); | |
420 | ||
421 | static int __devinit ps3disk_probe(struct ps3_system_bus_device *_dev) | |
422 | { | |
423 | struct ps3_storage_device *dev = to_ps3_storage_device(&_dev->core); | |
424 | struct ps3disk_private *priv; | |
425 | int error; | |
426 | unsigned int devidx; | |
427 | struct request_queue *queue; | |
428 | struct gendisk *gendisk; | |
429 | ||
430 | if (dev->blk_size < 512) { | |
431 | dev_err(&dev->sbd.core, | |
432 | "%s:%u: cannot handle block size %lu\n", __func__, | |
433 | __LINE__, dev->blk_size); | |
434 | return -EINVAL; | |
435 | } | |
436 | ||
437 | BUILD_BUG_ON(PS3DISK_MAX_DISKS > BITS_PER_LONG); | |
438 | mutex_lock(&ps3disk_mask_mutex); | |
439 | devidx = find_first_zero_bit(&ps3disk_mask, PS3DISK_MAX_DISKS); | |
440 | if (devidx >= PS3DISK_MAX_DISKS) { | |
441 | dev_err(&dev->sbd.core, "%s:%u: Too many disks\n", __func__, | |
442 | __LINE__); | |
443 | mutex_unlock(&ps3disk_mask_mutex); | |
444 | return -ENOSPC; | |
445 | } | |
446 | __set_bit(devidx, &ps3disk_mask); | |
447 | mutex_unlock(&ps3disk_mask_mutex); | |
448 | ||
449 | priv = kzalloc(sizeof(*priv), GFP_KERNEL); | |
450 | if (!priv) { | |
451 | error = -ENOMEM; | |
452 | goto fail; | |
453 | } | |
454 | ||
455 | dev->sbd.core.driver_data = priv; | |
456 | spin_lock_init(&priv->lock); | |
457 | ||
458 | dev->bounce_size = BOUNCE_SIZE; | |
459 | dev->bounce_buf = kmalloc(BOUNCE_SIZE, GFP_DMA); | |
460 | if (!dev->bounce_buf) { | |
461 | error = -ENOMEM; | |
462 | goto fail_free_priv; | |
463 | } | |
464 | ||
465 | error = ps3stor_setup(dev, ps3disk_interrupt); | |
466 | if (error) | |
467 | goto fail_free_bounce; | |
468 | ||
469 | ps3disk_identify(dev); | |
470 | ||
471 | queue = blk_init_queue(ps3disk_request, &priv->lock); | |
472 | if (!queue) { | |
473 | dev_err(&dev->sbd.core, "%s:%u: blk_init_queue failed\n", | |
474 | __func__, __LINE__); | |
475 | error = -ENOMEM; | |
476 | goto fail_teardown; | |
477 | } | |
478 | ||
479 | priv->queue = queue; | |
480 | queue->queuedata = dev; | |
481 | ||
482 | blk_queue_bounce_limit(queue, BLK_BOUNCE_HIGH); | |
483 | ||
484 | blk_queue_max_sectors(queue, dev->bounce_size >> 9); | |
485 | blk_queue_segment_boundary(queue, -1UL); | |
486 | blk_queue_dma_alignment(queue, dev->blk_size-1); | |
487 | blk_queue_hardsect_size(queue, dev->blk_size); | |
488 | ||
c6131fa5 GU |
489 | blk_queue_ordered(queue, QUEUE_ORDERED_DRAIN_FLUSH, |
490 | ps3disk_prepare_flush); | |
491 | ||
492 | blk_queue_max_phys_segments(queue, -1); | |
493 | blk_queue_max_hw_segments(queue, -1); | |
494 | blk_queue_max_segment_size(queue, dev->bounce_size); | |
495 | ||
496 | gendisk = alloc_disk(PS3DISK_MINORS); | |
497 | if (!gendisk) { | |
498 | dev_err(&dev->sbd.core, "%s:%u: alloc_disk failed\n", __func__, | |
499 | __LINE__); | |
500 | error = -ENOMEM; | |
501 | goto fail_cleanup_queue; | |
502 | } | |
503 | ||
504 | priv->gendisk = gendisk; | |
505 | gendisk->major = ps3disk_major; | |
506 | gendisk->first_minor = devidx * PS3DISK_MINORS; | |
507 | gendisk->fops = &ps3disk_fops; | |
508 | gendisk->queue = queue; | |
509 | gendisk->private_data = dev; | |
510 | gendisk->driverfs_dev = &dev->sbd.core; | |
511 | snprintf(gendisk->disk_name, sizeof(gendisk->disk_name), PS3DISK_NAME, | |
512 | devidx+'a'); | |
513 | priv->blocking_factor = dev->blk_size >> 9; | |
514 | set_capacity(gendisk, | |
515 | dev->regions[dev->region_idx].size*priv->blocking_factor); | |
516 | ||
517 | dev_info(&dev->sbd.core, | |
518 | "%s is a %s (%lu MiB total, %lu MiB for OtherOS)\n", | |
519 | gendisk->disk_name, priv->model, priv->raw_capacity >> 11, | |
520 | get_capacity(gendisk) >> 11); | |
521 | ||
522 | add_disk(gendisk); | |
523 | return 0; | |
524 | ||
525 | fail_cleanup_queue: | |
526 | blk_cleanup_queue(queue); | |
527 | fail_teardown: | |
528 | ps3stor_teardown(dev); | |
529 | fail_free_bounce: | |
530 | kfree(dev->bounce_buf); | |
531 | fail_free_priv: | |
532 | kfree(priv); | |
533 | dev->sbd.core.driver_data = NULL; | |
534 | fail: | |
535 | mutex_lock(&ps3disk_mask_mutex); | |
536 | __clear_bit(devidx, &ps3disk_mask); | |
537 | mutex_unlock(&ps3disk_mask_mutex); | |
538 | return error; | |
539 | } | |
540 | ||
541 | static int ps3disk_remove(struct ps3_system_bus_device *_dev) | |
542 | { | |
543 | struct ps3_storage_device *dev = to_ps3_storage_device(&_dev->core); | |
544 | struct ps3disk_private *priv = dev->sbd.core.driver_data; | |
545 | ||
546 | mutex_lock(&ps3disk_mask_mutex); | |
547 | __clear_bit(priv->gendisk->first_minor / PS3DISK_MINORS, | |
548 | &ps3disk_mask); | |
549 | mutex_unlock(&ps3disk_mask_mutex); | |
550 | del_gendisk(priv->gendisk); | |
551 | blk_cleanup_queue(priv->queue); | |
552 | put_disk(priv->gendisk); | |
553 | dev_notice(&dev->sbd.core, "Synchronizing disk cache\n"); | |
554 | ps3disk_sync_cache(dev); | |
555 | ps3stor_teardown(dev); | |
556 | kfree(dev->bounce_buf); | |
557 | kfree(priv); | |
558 | dev->sbd.core.driver_data = NULL; | |
559 | return 0; | |
560 | } | |
561 | ||
562 | static struct ps3_system_bus_driver ps3disk = { | |
563 | .match_id = PS3_MATCH_ID_STOR_DISK, | |
564 | .core.name = DEVICE_NAME, | |
565 | .core.owner = THIS_MODULE, | |
566 | .probe = ps3disk_probe, | |
567 | .remove = ps3disk_remove, | |
568 | .shutdown = ps3disk_remove, | |
569 | }; | |
570 | ||
571 | ||
572 | static int __init ps3disk_init(void) | |
573 | { | |
574 | int error; | |
575 | ||
576 | if (!firmware_has_feature(FW_FEATURE_PS3_LV1)) | |
577 | return -ENODEV; | |
578 | ||
579 | error = register_blkdev(0, DEVICE_NAME); | |
580 | if (error <= 0) { | |
581 | printk(KERN_ERR "%s:%u: register_blkdev failed %d\n", __func__, | |
582 | __LINE__, error); | |
583 | return error; | |
584 | } | |
585 | ps3disk_major = error; | |
586 | ||
587 | pr_info("%s:%u: registered block device major %d\n", __func__, | |
588 | __LINE__, ps3disk_major); | |
589 | ||
590 | error = ps3_system_bus_driver_register(&ps3disk); | |
591 | if (error) | |
592 | unregister_blkdev(ps3disk_major, DEVICE_NAME); | |
593 | ||
594 | return error; | |
595 | } | |
596 | ||
597 | static void __exit ps3disk_exit(void) | |
598 | { | |
599 | ps3_system_bus_driver_unregister(&ps3disk); | |
600 | unregister_blkdev(ps3disk_major, DEVICE_NAME); | |
601 | } | |
602 | ||
603 | module_init(ps3disk_init); | |
604 | module_exit(ps3disk_exit); | |
605 | ||
606 | MODULE_LICENSE("GPL"); | |
607 | MODULE_DESCRIPTION("PS3 Disk Storage Driver"); | |
608 | MODULE_AUTHOR("Sony Corporation"); | |
609 | MODULE_ALIAS(PS3_MODULE_ALIAS_STOR_DISK); |