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-rw-r--r--drivers/block/Makefile1
-rw-r--r--drivers/block/ps3disk.c630
2 files changed, 631 insertions, 0 deletions
diff --git a/drivers/block/Makefile b/drivers/block/Makefile
index 819c829125fb..a7a099027fca 100644
--- a/drivers/block/Makefile
+++ b/drivers/block/Makefile
@@ -8,6 +8,7 @@
8obj-$(CONFIG_MAC_FLOPPY) += swim3.o 8obj-$(CONFIG_MAC_FLOPPY) += swim3.o
9obj-$(CONFIG_BLK_DEV_FD) += floppy.o 9obj-$(CONFIG_BLK_DEV_FD) += floppy.o
10obj-$(CONFIG_AMIGA_FLOPPY) += amiflop.o 10obj-$(CONFIG_AMIGA_FLOPPY) += amiflop.o
11obj-$(CONFIG_PS3_DISK) += ps3disk.o
11obj-$(CONFIG_ATARI_FLOPPY) += ataflop.o 12obj-$(CONFIG_ATARI_FLOPPY) += ataflop.o
12obj-$(CONFIG_AMIGA_Z2RAM) += z2ram.o 13obj-$(CONFIG_AMIGA_Z2RAM) += z2ram.o
13obj-$(CONFIG_BLK_DEV_RAM) += rd.o 14obj-$(CONFIG_BLK_DEV_RAM) += rd.o
diff --git a/drivers/block/ps3disk.c b/drivers/block/ps3disk.c
new file mode 100644
index 000000000000..170fb33dba97
--- /dev/null
+++ b/drivers/block/ps3disk.c
@@ -0,0 +1,630 @@
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
40struct 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
54struct 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
70enum 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
77enum lv1_ata_in_out {
78 DIR_WRITE = 0, /* memory -> device */
79 DIR_READ = 1 /* device -> memory */
80};
81
82static int ps3disk_major;
83
84
85static struct block_device_operations ps3disk_fops = {
86 .owner = THIS_MODULE,
87};
88
89
90static void ps3disk_scatter_gather(struct ps3_storage_device *dev,
91 struct request *req, int gather)
92{
93 unsigned int offset = 0;
94 struct bio *bio;
95 sector_t sector;
96 struct bio_vec *bvec;
97 unsigned int i = 0, j;
98 size_t size;
99 void *buf;
100
101 rq_for_each_bio(bio, req) {
102 sector = bio->bi_sector;
103 dev_dbg(&dev->sbd.core,
104 "%s:%u: bio %u: %u segs %u sectors from %lu\n",
105 __func__, __LINE__, i, bio_segments(bio),
106 bio_sectors(bio), sector);
107 bio_for_each_segment(bvec, bio, j) {
108 size = bvec->bv_len;
109 buf = __bio_kmap_atomic(bio, j, KM_IRQ0);
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(bio_iovec_idx(bio, j)->bv_page);
116 __bio_kunmap_atomic(bio, KM_IRQ0);
117 }
118 i++;
119 }
120}
121
122static int ps3disk_submit_request_sg(struct ps3_storage_device *dev,
123 struct request *req)
124{
125 struct ps3disk_private *priv = dev->sbd.core.driver_data;
126 int write = rq_data_dir(req), res;
127 const char *op = write ? "write" : "read";
128 u64 start_sector, sectors;
129 unsigned int region_id = dev->regions[dev->region_idx].id;
130
131#ifdef DEBUG
132 unsigned int n = 0;
133 struct bio *bio;
134
135 rq_for_each_bio(bio, req)
136 n++;
137 dev_dbg(&dev->sbd.core,
138 "%s:%u: %s req has %u bios for %lu sectors %lu hard sectors\n",
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
170static 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
192static void ps3disk_do_request(struct ps3_storage_device *dev,
193 request_queue_t *q)
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
214static void ps3disk_request(request_queue_t *q)
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
227static 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
295static 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
313static 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
323static 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
338static 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
357static 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
372static 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
407static void ps3disk_prepare_flush(request_queue_t *q, struct request *req)
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
417static int ps3disk_issue_flush(request_queue_t *q, struct gendisk *gendisk,
418 sector_t *sector)
419{
420 struct ps3_storage_device *dev = q->queuedata;
421 struct request *req;
422 int res;
423
424 dev_dbg(&dev->sbd.core, "%s:%u\n", __func__, __LINE__);
425
426 req = blk_get_request(q, WRITE, __GFP_WAIT);
427 ps3disk_prepare_flush(q, req);
428 res = blk_execute_rq(q, gendisk, req, 0);
429 if (res)
430 dev_err(&dev->sbd.core, "%s:%u: flush request failed %d\n",
431 __func__, __LINE__, res);
432 blk_put_request(req);
433 return res;
434}
435
436
437static unsigned long ps3disk_mask;
438
439static DEFINE_MUTEX(ps3disk_mask_mutex);
440
441static int __devinit ps3disk_probe(struct ps3_system_bus_device *_dev)
442{
443 struct ps3_storage_device *dev = to_ps3_storage_device(&_dev->core);
444 struct ps3disk_private *priv;
445 int error;
446 unsigned int devidx;
447 struct request_queue *queue;
448 struct gendisk *gendisk;
449
450 if (dev->blk_size < 512) {
451 dev_err(&dev->sbd.core,
452 "%s:%u: cannot handle block size %lu\n", __func__,
453 __LINE__, dev->blk_size);
454 return -EINVAL;
455 }
456
457 BUILD_BUG_ON(PS3DISK_MAX_DISKS > BITS_PER_LONG);
458 mutex_lock(&ps3disk_mask_mutex);
459 devidx = find_first_zero_bit(&ps3disk_mask, PS3DISK_MAX_DISKS);
460 if (devidx >= PS3DISK_MAX_DISKS) {
461 dev_err(&dev->sbd.core, "%s:%u: Too many disks\n", __func__,
462 __LINE__);
463 mutex_unlock(&ps3disk_mask_mutex);
464 return -ENOSPC;
465 }
466 __set_bit(devidx, &ps3disk_mask);
467 mutex_unlock(&ps3disk_mask_mutex);
468
469 priv = kzalloc(sizeof(*priv), GFP_KERNEL);
470 if (!priv) {
471 error = -ENOMEM;
472 goto fail;
473 }
474
475 dev->sbd.core.driver_data = priv;
476 spin_lock_init(&priv->lock);
477
478 dev->bounce_size = BOUNCE_SIZE;
479 dev->bounce_buf = kmalloc(BOUNCE_SIZE, GFP_DMA);
480 if (!dev->bounce_buf) {
481 error = -ENOMEM;
482 goto fail_free_priv;
483 }
484
485 error = ps3stor_setup(dev, ps3disk_interrupt);
486 if (error)
487 goto fail_free_bounce;
488
489 ps3disk_identify(dev);
490
491 queue = blk_init_queue(ps3disk_request, &priv->lock);
492 if (!queue) {
493 dev_err(&dev->sbd.core, "%s:%u: blk_init_queue failed\n",
494 __func__, __LINE__);
495 error = -ENOMEM;
496 goto fail_teardown;
497 }
498
499 priv->queue = queue;
500 queue->queuedata = dev;
501
502 blk_queue_bounce_limit(queue, BLK_BOUNCE_HIGH);
503
504 blk_queue_max_sectors(queue, dev->bounce_size >> 9);
505 blk_queue_segment_boundary(queue, -1UL);
506 blk_queue_dma_alignment(queue, dev->blk_size-1);
507 blk_queue_hardsect_size(queue, dev->blk_size);
508
509 blk_queue_issue_flush_fn(queue, ps3disk_issue_flush);
510 blk_queue_ordered(queue, QUEUE_ORDERED_DRAIN_FLUSH,
511 ps3disk_prepare_flush);
512
513 blk_queue_max_phys_segments(queue, -1);
514 blk_queue_max_hw_segments(queue, -1);
515 blk_queue_max_segment_size(queue, dev->bounce_size);
516
517 gendisk = alloc_disk(PS3DISK_MINORS);
518 if (!gendisk) {
519 dev_err(&dev->sbd.core, "%s:%u: alloc_disk failed\n", __func__,
520 __LINE__);
521 error = -ENOMEM;
522 goto fail_cleanup_queue;
523 }
524
525 priv->gendisk = gendisk;
526 gendisk->major = ps3disk_major;
527 gendisk->first_minor = devidx * PS3DISK_MINORS;
528 gendisk->fops = &ps3disk_fops;
529 gendisk->queue = queue;
530 gendisk->private_data = dev;
531 gendisk->driverfs_dev = &dev->sbd.core;
532 snprintf(gendisk->disk_name, sizeof(gendisk->disk_name), PS3DISK_NAME,
533 devidx+'a');
534 priv->blocking_factor = dev->blk_size >> 9;
535 set_capacity(gendisk,
536 dev->regions[dev->region_idx].size*priv->blocking_factor);
537
538 dev_info(&dev->sbd.core,
539 "%s is a %s (%lu MiB total, %lu MiB for OtherOS)\n",
540 gendisk->disk_name, priv->model, priv->raw_capacity >> 11,
541 get_capacity(gendisk) >> 11);
542
543 add_disk(gendisk);
544 return 0;
545
546fail_cleanup_queue:
547 blk_cleanup_queue(queue);
548fail_teardown:
549 ps3stor_teardown(dev);
550fail_free_bounce:
551 kfree(dev->bounce_buf);
552fail_free_priv:
553 kfree(priv);
554 dev->sbd.core.driver_data = NULL;
555fail:
556 mutex_lock(&ps3disk_mask_mutex);
557 __clear_bit(devidx, &ps3disk_mask);
558 mutex_unlock(&ps3disk_mask_mutex);
559 return error;
560}
561
562static int ps3disk_remove(struct ps3_system_bus_device *_dev)
563{
564 struct ps3_storage_device *dev = to_ps3_storage_device(&_dev->core);
565 struct ps3disk_private *priv = dev->sbd.core.driver_data;
566
567 mutex_lock(&ps3disk_mask_mutex);
568 __clear_bit(priv->gendisk->first_minor / PS3DISK_MINORS,
569 &ps3disk_mask);
570 mutex_unlock(&ps3disk_mask_mutex);
571 del_gendisk(priv->gendisk);
572 blk_cleanup_queue(priv->queue);
573 put_disk(priv->gendisk);
574 dev_notice(&dev->sbd.core, "Synchronizing disk cache\n");
575 ps3disk_sync_cache(dev);
576 ps3stor_teardown(dev);
577 kfree(dev->bounce_buf);
578 kfree(priv);
579 dev->sbd.core.driver_data = NULL;
580 return 0;
581}
582
583static struct ps3_system_bus_driver ps3disk = {
584 .match_id = PS3_MATCH_ID_STOR_DISK,
585 .core.name = DEVICE_NAME,
586 .core.owner = THIS_MODULE,
587 .probe = ps3disk_probe,
588 .remove = ps3disk_remove,
589 .shutdown = ps3disk_remove,
590};
591
592
593static int __init ps3disk_init(void)
594{
595 int error;
596
597 if (!firmware_has_feature(FW_FEATURE_PS3_LV1))
598 return -ENODEV;
599
600 error = register_blkdev(0, DEVICE_NAME);
601 if (error <= 0) {
602 printk(KERN_ERR "%s:%u: register_blkdev failed %d\n", __func__,
603 __LINE__, error);
604 return error;
605 }
606 ps3disk_major = error;
607
608 pr_info("%s:%u: registered block device major %d\n", __func__,
609 __LINE__, ps3disk_major);
610
611 error = ps3_system_bus_driver_register(&ps3disk);
612 if (error)
613 unregister_blkdev(ps3disk_major, DEVICE_NAME);
614
615 return error;
616}
617
618static void __exit ps3disk_exit(void)
619{
620 ps3_system_bus_driver_unregister(&ps3disk);
621 unregister_blkdev(ps3disk_major, DEVICE_NAME);
622}
623
624module_init(ps3disk_init);
625module_exit(ps3disk_exit);
626
627MODULE_LICENSE("GPL");
628MODULE_DESCRIPTION("PS3 Disk Storage Driver");
629MODULE_AUTHOR("Sony Corporation");
630MODULE_ALIAS(PS3_MODULE_ALIAS_STOR_DISK);