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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#include <linux/slab.h>
24
25#include <asm/lv1call.h>
26#include <asm/ps3stor.h>
27#include <asm/firmware.h>
28
29
30#define DEVICE_NAME "ps3disk"
31
32#define BOUNCE_SIZE (64*1024)
33
34#define PS3DISK_MAX_DISKS 16
35#define PS3DISK_MINORS 16
36
37
38#define PS3DISK_NAME "ps3d%c"
39
40
41struct ps3disk_private {
42 spinlock_t lock; /* Request queue spinlock */
43 struct request_queue *queue;
44 struct gendisk *gendisk;
45 unsigned int blocking_factor;
46 struct request *req;
47 u64 raw_capacity;
48 unsigned char model[ATA_ID_PROD_LEN+1];
49};
50
51
52#define LV1_STORAGE_SEND_ATA_COMMAND (2)
53#define LV1_STORAGE_ATA_HDDOUT (0x23)
54
55struct lv1_ata_cmnd_block {
56 u16 features;
57 u16 sector_count;
58 u16 LBA_low;
59 u16 LBA_mid;
60 u16 LBA_high;
61 u8 device;
62 u8 command;
63 u32 is_ext;
64 u32 proto;
65 u32 in_out;
66 u32 size;
67 u64 buffer;
68 u32 arglen;
69};
70
71enum lv1_ata_proto {
72 NON_DATA_PROTO = 0,
73 PIO_DATA_IN_PROTO = 1,
74 PIO_DATA_OUT_PROTO = 2,
75 DMA_PROTO = 3
76};
77
78enum lv1_ata_in_out {
79 DIR_WRITE = 0, /* memory -> device */
80 DIR_READ = 1 /* device -> memory */
81};
82
83static int ps3disk_major;
84
85
86static const struct block_device_operations ps3disk_fops = {
87 .owner = THIS_MODULE,
88};
89
90
91static void ps3disk_scatter_gather(struct ps3_storage_device *dev,
92 struct request *req, int gather)
93{
94 unsigned int offset = 0;
95 struct req_iterator iter;
96 struct bio_vec *bvec;
97 unsigned int i = 0;
98 size_t size;
99 void *buf;
100
101 rq_for_each_segment(bvec, req, iter) {
102 unsigned long flags;
103 dev_dbg(&dev->sbd.core,
104 "%s:%u: bio %u: %u segs %u sectors from %lu\n",
105 __func__, __LINE__, i, bio_segments(iter.bio),
106 bio_sectors(iter.bio), iter.bio->bi_sector);
107
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(buf, &flags);
117 i++;
118 }
119}
120
121static int ps3disk_submit_request_sg(struct ps3_storage_device *dev,
122 struct request *req)
123{
124 struct ps3disk_private *priv = ps3_system_bus_get_drvdata(&dev->sbd);
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;
132 struct bio_vec *bv;
133 struct req_iterator iter;
134
135 rq_for_each_segment(bv, req, iter)
136 n++;
137 dev_dbg(&dev->sbd.core,
138 "%s:%u: %s req has %u bvecs for %u sectors\n",
139 __func__, __LINE__, op, n, blk_rq_sectors(req));
140#endif
141
142 start_sector = blk_rq_pos(req) * priv->blocking_factor;
143 sectors = blk_rq_sectors(req) * priv->blocking_factor;
144 dev_dbg(&dev->sbd.core, "%s:%u: %s %llu sectors starting at %llu\n",
145 __func__, __LINE__, op, sectors, start_sector);
146
147 if (write) {
148 ps3disk_scatter_gather(dev, req, 1);
149
150 res = lv1_storage_write(dev->sbd.dev_id, region_id,
151 start_sector, sectors, 0,
152 dev->bounce_lpar, &dev->tag);
153 } else {
154 res = lv1_storage_read(dev->sbd.dev_id, region_id,
155 start_sector, sectors, 0,
156 dev->bounce_lpar, &dev->tag);
157 }
158 if (res) {
159 dev_err(&dev->sbd.core, "%s:%u: %s failed %d\n", __func__,
160 __LINE__, op, res);
161 __blk_end_request_all(req, -EIO);
162 return 0;
163 }
164
165 priv->req = req;
166 return 1;
167}
168
169static int ps3disk_submit_flush_request(struct ps3_storage_device *dev,
170 struct request *req)
171{
172 struct ps3disk_private *priv = ps3_system_bus_get_drvdata(&dev->sbd);
173 u64 res;
174
175 dev_dbg(&dev->sbd.core, "%s:%u: flush request\n", __func__, __LINE__);
176
177 res = lv1_storage_send_device_command(dev->sbd.dev_id,
178 LV1_STORAGE_ATA_HDDOUT, 0, 0, 0,
179 0, &dev->tag);
180 if (res) {
181 dev_err(&dev->sbd.core, "%s:%u: sync cache failed 0x%llx\n",
182 __func__, __LINE__, res);
183 __blk_end_request_all(req, -EIO);
184 return 0;
185 }
186
187 priv->req = req;
188 return 1;
189}
190
191static void ps3disk_do_request(struct ps3_storage_device *dev,
192 struct request_queue *q)
193{
194 struct request *req;
195
196 dev_dbg(&dev->sbd.core, "%s:%u\n", __func__, __LINE__);
197
198 while ((req = blk_fetch_request(q))) {
199 if (req->cmd_flags & REQ_FLUSH) {
200 if (ps3disk_submit_flush_request(dev, req))
201 break;
202 } else if (req->cmd_type == REQ_TYPE_FS) {
203 if (ps3disk_submit_request_sg(dev, req))
204 break;
205 } else {
206 blk_dump_rq_flags(req, DEVICE_NAME " bad request");
207 __blk_end_request_all(req, -EIO);
208 continue;
209 }
210 }
211}
212
213static void ps3disk_request(struct request_queue *q)
214{
215 struct ps3_storage_device *dev = q->queuedata;
216 struct ps3disk_private *priv = ps3_system_bus_get_drvdata(&dev->sbd);
217
218 if (priv->req) {
219 dev_dbg(&dev->sbd.core, "%s:%u busy\n", __func__, __LINE__);
220 return;
221 }
222
223 ps3disk_do_request(dev, q);
224}
225
226static irqreturn_t ps3disk_interrupt(int irq, void *data)
227{
228 struct ps3_storage_device *dev = data;
229 struct ps3disk_private *priv;
230 struct request *req;
231 int res, read, error;
232 u64 tag, status;
233 const char *op;
234
235 res = lv1_storage_get_async_status(dev->sbd.dev_id, &tag, &status);
236
237 if (tag != dev->tag)
238 dev_err(&dev->sbd.core,
239 "%s:%u: tag mismatch, got %llx, expected %llx\n",
240 __func__, __LINE__, tag, dev->tag);
241
242 if (res) {
243 dev_err(&dev->sbd.core, "%s:%u: res=%d status=0x%llx\n",
244 __func__, __LINE__, res, status);
245 return IRQ_HANDLED;
246 }
247
248 priv = ps3_system_bus_get_drvdata(&dev->sbd);
249 req = priv->req;
250 if (!req) {
251 dev_dbg(&dev->sbd.core,
252 "%s:%u non-block layer request completed\n", __func__,
253 __LINE__);
254 dev->lv1_status = status;
255 complete(&dev->done);
256 return IRQ_HANDLED;
257 }
258
259 if (req->cmd_flags & REQ_FLUSH) {
260 read = 0;
261 op = "flush";
262 } else {
263 read = !rq_data_dir(req);
264 op = read ? "read" : "write";
265 }
266 if (status) {
267 dev_dbg(&dev->sbd.core, "%s:%u: %s failed 0x%llx\n", __func__,
268 __LINE__, op, status);
269 error = -EIO;
270 } else {
271 dev_dbg(&dev->sbd.core, "%s:%u: %s completed\n", __func__,
272 __LINE__, op);
273 error = 0;
274 if (read)
275 ps3disk_scatter_gather(dev, req, 0);
276 }
277
278 spin_lock(&priv->lock);
279 __blk_end_request_all(req, error);
280 priv->req = NULL;
281 ps3disk_do_request(dev, priv->queue);
282 spin_unlock(&priv->lock);
283
284 return IRQ_HANDLED;
285}
286
287static int ps3disk_sync_cache(struct ps3_storage_device *dev)
288{
289 u64 res;
290
291 dev_dbg(&dev->sbd.core, "%s:%u: sync cache\n", __func__, __LINE__);
292
293 res = ps3stor_send_command(dev, LV1_STORAGE_ATA_HDDOUT, 0, 0, 0, 0);
294 if (res) {
295 dev_err(&dev->sbd.core, "%s:%u: sync cache failed 0x%llx\n",
296 __func__, __LINE__, res);
297 return -EIO;
298 }
299 return 0;
300}
301
302
303/* ATA helpers copied from drivers/ata/libata-core.c */
304
305static void swap_buf_le16(u16 *buf, unsigned int buf_words)
306{
307#ifdef __BIG_ENDIAN
308 unsigned int i;
309
310 for (i = 0; i < buf_words; i++)
311 buf[i] = le16_to_cpu(buf[i]);
312#endif /* __BIG_ENDIAN */
313}
314
315static u64 ata_id_n_sectors(const u16 *id)
316{
317 if (ata_id_has_lba(id)) {
318 if (ata_id_has_lba48(id))
319 return ata_id_u64(id, 100);
320 else
321 return ata_id_u32(id, 60);
322 } else {
323 if (ata_id_current_chs_valid(id))
324 return ata_id_u32(id, 57);
325 else
326 return id[1] * id[3] * id[6];
327 }
328}
329
330static void ata_id_string(const u16 *id, unsigned char *s, unsigned int ofs,
331 unsigned int len)
332{
333 unsigned int c;
334
335 while (len > 0) {
336 c = id[ofs] >> 8;
337 *s = c;
338 s++;
339
340 c = id[ofs] & 0xff;
341 *s = c;
342 s++;
343
344 ofs++;
345 len -= 2;
346 }
347}
348
349static void ata_id_c_string(const u16 *id, unsigned char *s, unsigned int ofs,
350 unsigned int len)
351{
352 unsigned char *p;
353
354 WARN_ON(!(len & 1));
355
356 ata_id_string(id, s, ofs, len - 1);
357
358 p = s + strnlen(s, len - 1);
359 while (p > s && p[-1] == ' ')
360 p--;
361 *p = '\0';
362}
363
364static int ps3disk_identify(struct ps3_storage_device *dev)
365{
366 struct ps3disk_private *priv = ps3_system_bus_get_drvdata(&dev->sbd);
367 struct lv1_ata_cmnd_block ata_cmnd;
368 u16 *id = dev->bounce_buf;
369 u64 res;
370
371 dev_dbg(&dev->sbd.core, "%s:%u: identify disk\n", __func__, __LINE__);
372
373 memset(&ata_cmnd, 0, sizeof(struct lv1_ata_cmnd_block));
374 ata_cmnd.command = ATA_CMD_ID_ATA;
375 ata_cmnd.sector_count = 1;
376 ata_cmnd.size = ata_cmnd.arglen = ATA_ID_WORDS * 2;
377 ata_cmnd.buffer = dev->bounce_lpar;
378 ata_cmnd.proto = PIO_DATA_IN_PROTO;
379 ata_cmnd.in_out = DIR_READ;
380
381 res = ps3stor_send_command(dev, LV1_STORAGE_SEND_ATA_COMMAND,
382 ps3_mm_phys_to_lpar(__pa(&ata_cmnd)),
383 sizeof(ata_cmnd), ata_cmnd.buffer,
384 ata_cmnd.arglen);
385 if (res) {
386 dev_err(&dev->sbd.core, "%s:%u: identify disk failed 0x%llx\n",
387 __func__, __LINE__, res);
388 return -EIO;
389 }
390
391 swap_buf_le16(id, ATA_ID_WORDS);
392
393 /* All we're interested in are raw capacity and model name */
394 priv->raw_capacity = ata_id_n_sectors(id);
395 ata_id_c_string(id, priv->model, ATA_ID_PROD, sizeof(priv->model));
396 return 0;
397}
398
399static unsigned long ps3disk_mask;
400
401static DEFINE_MUTEX(ps3disk_mask_mutex);
402
403static int __devinit ps3disk_probe(struct ps3_system_bus_device *_dev)
404{
405 struct ps3_storage_device *dev = to_ps3_storage_device(&_dev->core);
406 struct ps3disk_private *priv;
407 int error;
408 unsigned int devidx;
409 struct request_queue *queue;
410 struct gendisk *gendisk;
411
412 if (dev->blk_size < 512) {
413 dev_err(&dev->sbd.core,
414 "%s:%u: cannot handle block size %llu\n", __func__,
415 __LINE__, dev->blk_size);
416 return -EINVAL;
417 }
418
419 BUILD_BUG_ON(PS3DISK_MAX_DISKS > BITS_PER_LONG);
420 mutex_lock(&ps3disk_mask_mutex);
421 devidx = find_first_zero_bit(&ps3disk_mask, PS3DISK_MAX_DISKS);
422 if (devidx >= PS3DISK_MAX_DISKS) {
423 dev_err(&dev->sbd.core, "%s:%u: Too many disks\n", __func__,
424 __LINE__);
425 mutex_unlock(&ps3disk_mask_mutex);
426 return -ENOSPC;
427 }
428 __set_bit(devidx, &ps3disk_mask);
429 mutex_unlock(&ps3disk_mask_mutex);
430
431 priv = kzalloc(sizeof(*priv), GFP_KERNEL);
432 if (!priv) {
433 error = -ENOMEM;
434 goto fail;
435 }
436
437 ps3_system_bus_set_drvdata(_dev, priv);
438 spin_lock_init(&priv->lock);
439
440 dev->bounce_size = BOUNCE_SIZE;
441 dev->bounce_buf = kmalloc(BOUNCE_SIZE, GFP_DMA);
442 if (!dev->bounce_buf) {
443 error = -ENOMEM;
444 goto fail_free_priv;
445 }
446
447 error = ps3stor_setup(dev, ps3disk_interrupt);
448 if (error)
449 goto fail_free_bounce;
450
451 ps3disk_identify(dev);
452
453 queue = blk_init_queue(ps3disk_request, &priv->lock);
454 if (!queue) {
455 dev_err(&dev->sbd.core, "%s:%u: blk_init_queue failed\n",
456 __func__, __LINE__);
457 error = -ENOMEM;
458 goto fail_teardown;
459 }
460
461 priv->queue = queue;
462 queue->queuedata = dev;
463
464 blk_queue_bounce_limit(queue, BLK_BOUNCE_HIGH);
465
466 blk_queue_max_hw_sectors(queue, dev->bounce_size >> 9);
467 blk_queue_segment_boundary(queue, -1UL);
468 blk_queue_dma_alignment(queue, dev->blk_size-1);
469 blk_queue_logical_block_size(queue, dev->blk_size);
470
471 blk_queue_flush(queue, REQ_FLUSH);
472
473 blk_queue_max_segments(queue, -1);
474 blk_queue_max_segment_size(queue, dev->bounce_size);
475
476 gendisk = alloc_disk(PS3DISK_MINORS);
477 if (!gendisk) {
478 dev_err(&dev->sbd.core, "%s:%u: alloc_disk failed\n", __func__,
479 __LINE__);
480 error = -ENOMEM;
481 goto fail_cleanup_queue;
482 }
483
484 priv->gendisk = gendisk;
485 gendisk->major = ps3disk_major;
486 gendisk->first_minor = devidx * PS3DISK_MINORS;
487 gendisk->fops = &ps3disk_fops;
488 gendisk->queue = queue;
489 gendisk->private_data = dev;
490 gendisk->driverfs_dev = &dev->sbd.core;
491 snprintf(gendisk->disk_name, sizeof(gendisk->disk_name), PS3DISK_NAME,
492 devidx+'a');
493 priv->blocking_factor = dev->blk_size >> 9;
494 set_capacity(gendisk,
495 dev->regions[dev->region_idx].size*priv->blocking_factor);
496
497 dev_info(&dev->sbd.core,
498 "%s is a %s (%llu MiB total, %lu MiB for OtherOS)\n",
499 gendisk->disk_name, priv->model, priv->raw_capacity >> 11,
500 get_capacity(gendisk) >> 11);
501
502 add_disk(gendisk);
503 return 0;
504
505fail_cleanup_queue:
506 blk_cleanup_queue(queue);
507fail_teardown:
508 ps3stor_teardown(dev);
509fail_free_bounce:
510 kfree(dev->bounce_buf);
511fail_free_priv:
512 kfree(priv);
513 ps3_system_bus_set_drvdata(_dev, NULL);
514fail:
515 mutex_lock(&ps3disk_mask_mutex);
516 __clear_bit(devidx, &ps3disk_mask);
517 mutex_unlock(&ps3disk_mask_mutex);
518 return error;
519}
520
521static int ps3disk_remove(struct ps3_system_bus_device *_dev)
522{
523 struct ps3_storage_device *dev = to_ps3_storage_device(&_dev->core);
524 struct ps3disk_private *priv = ps3_system_bus_get_drvdata(&dev->sbd);
525
526 mutex_lock(&ps3disk_mask_mutex);
527 __clear_bit(MINOR(disk_devt(priv->gendisk)) / PS3DISK_MINORS,
528 &ps3disk_mask);
529 mutex_unlock(&ps3disk_mask_mutex);
530 del_gendisk(priv->gendisk);
531 blk_cleanup_queue(priv->queue);
532 put_disk(priv->gendisk);
533 dev_notice(&dev->sbd.core, "Synchronizing disk cache\n");
534 ps3disk_sync_cache(dev);
535 ps3stor_teardown(dev);
536 kfree(dev->bounce_buf);
537 kfree(priv);
538 ps3_system_bus_set_drvdata(_dev, NULL);
539 return 0;
540}
541
542static struct ps3_system_bus_driver ps3disk = {
543 .match_id = PS3_MATCH_ID_STOR_DISK,
544 .core.name = DEVICE_NAME,
545 .core.owner = THIS_MODULE,
546 .probe = ps3disk_probe,
547 .remove = ps3disk_remove,
548 .shutdown = ps3disk_remove,
549};
550
551
552static int __init ps3disk_init(void)
553{
554 int error;
555
556 if (!firmware_has_feature(FW_FEATURE_PS3_LV1))
557 return -ENODEV;
558
559 error = register_blkdev(0, DEVICE_NAME);
560 if (error <= 0) {
561 printk(KERN_ERR "%s:%u: register_blkdev failed %d\n", __func__,
562 __LINE__, error);
563 return error;
564 }
565 ps3disk_major = error;
566
567 pr_info("%s:%u: registered block device major %d\n", __func__,
568 __LINE__, ps3disk_major);
569
570 error = ps3_system_bus_driver_register(&ps3disk);
571 if (error)
572 unregister_blkdev(ps3disk_major, DEVICE_NAME);
573
574 return error;
575}
576
577static void __exit ps3disk_exit(void)
578{
579 ps3_system_bus_driver_unregister(&ps3disk);
580 unregister_blkdev(ps3disk_major, DEVICE_NAME);
581}
582
583module_init(ps3disk_init);
584module_exit(ps3disk_exit);
585
586MODULE_LICENSE("GPL");
587MODULE_DESCRIPTION("PS3 Disk Storage Driver");
588MODULE_AUTHOR("Sony Corporation");
589MODULE_ALIAS(PS3_MODULE_ALIAS_STOR_DISK);
1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * PS3 Disk Storage Driver
4 *
5 * Copyright (C) 2007 Sony Computer Entertainment Inc.
6 * Copyright 2007 Sony Corp.
7 */
8
9#include <linux/ata.h>
10#include <linux/blk-mq.h>
11#include <linux/slab.h>
12#include <linux/module.h>
13
14#include <asm/lv1call.h>
15#include <asm/ps3stor.h>
16#include <asm/firmware.h>
17
18
19#define DEVICE_NAME "ps3disk"
20
21#define BOUNCE_SIZE (64*1024)
22
23#define PS3DISK_MAX_DISKS 16
24#define PS3DISK_MINORS 16
25
26
27#define PS3DISK_NAME "ps3d%c"
28
29
30struct ps3disk_private {
31 spinlock_t lock; /* Request queue spinlock */
32 struct request_queue *queue;
33 struct blk_mq_tag_set tag_set;
34 struct gendisk *gendisk;
35 unsigned int blocking_factor;
36 struct request *req;
37 u64 raw_capacity;
38 unsigned char model[ATA_ID_PROD_LEN+1];
39};
40
41
42#define LV1_STORAGE_SEND_ATA_COMMAND (2)
43#define LV1_STORAGE_ATA_HDDOUT (0x23)
44
45struct lv1_ata_cmnd_block {
46 u16 features;
47 u16 sector_count;
48 u16 LBA_low;
49 u16 LBA_mid;
50 u16 LBA_high;
51 u8 device;
52 u8 command;
53 u32 is_ext;
54 u32 proto;
55 u32 in_out;
56 u32 size;
57 u64 buffer;
58 u32 arglen;
59};
60
61enum lv1_ata_proto {
62 NON_DATA_PROTO = 0,
63 PIO_DATA_IN_PROTO = 1,
64 PIO_DATA_OUT_PROTO = 2,
65 DMA_PROTO = 3
66};
67
68enum lv1_ata_in_out {
69 DIR_WRITE = 0, /* memory -> device */
70 DIR_READ = 1 /* device -> memory */
71};
72
73static int ps3disk_major;
74
75
76static const struct block_device_operations ps3disk_fops = {
77 .owner = THIS_MODULE,
78};
79
80
81static void ps3disk_scatter_gather(struct ps3_storage_device *dev,
82 struct request *req, int gather)
83{
84 unsigned int offset = 0;
85 struct req_iterator iter;
86 struct bio_vec bvec;
87 unsigned int i = 0;
88 size_t size;
89 void *buf;
90
91 rq_for_each_segment(bvec, req, iter) {
92 unsigned long flags;
93 dev_dbg(&dev->sbd.core, "%s:%u: bio %u: %u sectors from %llu\n",
94 __func__, __LINE__, i, bio_sectors(iter.bio),
95 iter.bio->bi_iter.bi_sector);
96
97 size = bvec.bv_len;
98 buf = bvec_kmap_irq(&bvec, &flags);
99 if (gather)
100 memcpy(dev->bounce_buf+offset, buf, size);
101 else
102 memcpy(buf, dev->bounce_buf+offset, size);
103 offset += size;
104 flush_kernel_dcache_page(bvec.bv_page);
105 bvec_kunmap_irq(buf, &flags);
106 i++;
107 }
108}
109
110static blk_status_t ps3disk_submit_request_sg(struct ps3_storage_device *dev,
111 struct request *req)
112{
113 struct ps3disk_private *priv = ps3_system_bus_get_drvdata(&dev->sbd);
114 int write = rq_data_dir(req), res;
115 const char *op = write ? "write" : "read";
116 u64 start_sector, sectors;
117 unsigned int region_id = dev->regions[dev->region_idx].id;
118
119#ifdef DEBUG
120 unsigned int n = 0;
121 struct bio_vec bv;
122 struct req_iterator iter;
123
124 rq_for_each_segment(bv, req, iter)
125 n++;
126 dev_dbg(&dev->sbd.core,
127 "%s:%u: %s req has %u bvecs for %u sectors\n",
128 __func__, __LINE__, op, n, blk_rq_sectors(req));
129#endif
130
131 start_sector = blk_rq_pos(req) * priv->blocking_factor;
132 sectors = blk_rq_sectors(req) * priv->blocking_factor;
133 dev_dbg(&dev->sbd.core, "%s:%u: %s %llu sectors starting at %llu\n",
134 __func__, __LINE__, op, sectors, start_sector);
135
136 if (write) {
137 ps3disk_scatter_gather(dev, req, 1);
138
139 res = lv1_storage_write(dev->sbd.dev_id, region_id,
140 start_sector, sectors, 0,
141 dev->bounce_lpar, &dev->tag);
142 } else {
143 res = lv1_storage_read(dev->sbd.dev_id, region_id,
144 start_sector, sectors, 0,
145 dev->bounce_lpar, &dev->tag);
146 }
147 if (res) {
148 dev_err(&dev->sbd.core, "%s:%u: %s failed %d\n", __func__,
149 __LINE__, op, res);
150 return BLK_STS_IOERR;
151 }
152
153 priv->req = req;
154 return BLK_STS_OK;
155}
156
157static blk_status_t ps3disk_submit_flush_request(struct ps3_storage_device *dev,
158 struct request *req)
159{
160 struct ps3disk_private *priv = ps3_system_bus_get_drvdata(&dev->sbd);
161 u64 res;
162
163 dev_dbg(&dev->sbd.core, "%s:%u: flush request\n", __func__, __LINE__);
164
165 res = lv1_storage_send_device_command(dev->sbd.dev_id,
166 LV1_STORAGE_ATA_HDDOUT, 0, 0, 0,
167 0, &dev->tag);
168 if (res) {
169 dev_err(&dev->sbd.core, "%s:%u: sync cache failed 0x%llx\n",
170 __func__, __LINE__, res);
171 return BLK_STS_IOERR;
172 }
173
174 priv->req = req;
175 return BLK_STS_OK;
176}
177
178static blk_status_t ps3disk_do_request(struct ps3_storage_device *dev,
179 struct request *req)
180{
181 dev_dbg(&dev->sbd.core, "%s:%u\n", __func__, __LINE__);
182
183 switch (req_op(req)) {
184 case REQ_OP_FLUSH:
185 return ps3disk_submit_flush_request(dev, req);
186 case REQ_OP_READ:
187 case REQ_OP_WRITE:
188 return ps3disk_submit_request_sg(dev, req);
189 default:
190 blk_dump_rq_flags(req, DEVICE_NAME " bad request");
191 return BLK_STS_IOERR;
192 }
193}
194
195static blk_status_t ps3disk_queue_rq(struct blk_mq_hw_ctx *hctx,
196 const struct blk_mq_queue_data *bd)
197{
198 struct request_queue *q = hctx->queue;
199 struct ps3_storage_device *dev = q->queuedata;
200 struct ps3disk_private *priv = ps3_system_bus_get_drvdata(&dev->sbd);
201 blk_status_t ret;
202
203 blk_mq_start_request(bd->rq);
204
205 spin_lock_irq(&priv->lock);
206 ret = ps3disk_do_request(dev, bd->rq);
207 spin_unlock_irq(&priv->lock);
208
209 return ret;
210}
211
212static irqreturn_t ps3disk_interrupt(int irq, void *data)
213{
214 struct ps3_storage_device *dev = data;
215 struct ps3disk_private *priv;
216 struct request *req;
217 int res, read;
218 blk_status_t error;
219 u64 tag, status;
220 const char *op;
221
222 res = lv1_storage_get_async_status(dev->sbd.dev_id, &tag, &status);
223
224 if (tag != dev->tag)
225 dev_err(&dev->sbd.core,
226 "%s:%u: tag mismatch, got %llx, expected %llx\n",
227 __func__, __LINE__, tag, dev->tag);
228
229 if (res) {
230 dev_err(&dev->sbd.core, "%s:%u: res=%d status=0x%llx\n",
231 __func__, __LINE__, res, status);
232 return IRQ_HANDLED;
233 }
234
235 priv = ps3_system_bus_get_drvdata(&dev->sbd);
236 req = priv->req;
237 if (!req) {
238 dev_dbg(&dev->sbd.core,
239 "%s:%u non-block layer request completed\n", __func__,
240 __LINE__);
241 dev->lv1_status = status;
242 complete(&dev->done);
243 return IRQ_HANDLED;
244 }
245
246 if (req_op(req) == REQ_OP_FLUSH) {
247 read = 0;
248 op = "flush";
249 } else {
250 read = !rq_data_dir(req);
251 op = read ? "read" : "write";
252 }
253 if (status) {
254 dev_dbg(&dev->sbd.core, "%s:%u: %s failed 0x%llx\n", __func__,
255 __LINE__, op, status);
256 error = BLK_STS_IOERR;
257 } else {
258 dev_dbg(&dev->sbd.core, "%s:%u: %s completed\n", __func__,
259 __LINE__, op);
260 error = 0;
261 if (read)
262 ps3disk_scatter_gather(dev, req, 0);
263 }
264
265 spin_lock(&priv->lock);
266 priv->req = NULL;
267 blk_mq_end_request(req, error);
268 spin_unlock(&priv->lock);
269
270 blk_mq_run_hw_queues(priv->queue, true);
271 return IRQ_HANDLED;
272}
273
274static int ps3disk_sync_cache(struct ps3_storage_device *dev)
275{
276 u64 res;
277
278 dev_dbg(&dev->sbd.core, "%s:%u: sync cache\n", __func__, __LINE__);
279
280 res = ps3stor_send_command(dev, LV1_STORAGE_ATA_HDDOUT, 0, 0, 0, 0);
281 if (res) {
282 dev_err(&dev->sbd.core, "%s:%u: sync cache failed 0x%llx\n",
283 __func__, __LINE__, res);
284 return -EIO;
285 }
286 return 0;
287}
288
289
290/* ATA helpers copied from drivers/ata/libata-core.c */
291
292static void swap_buf_le16(u16 *buf, unsigned int buf_words)
293{
294#ifdef __BIG_ENDIAN
295 unsigned int i;
296
297 for (i = 0; i < buf_words; i++)
298 buf[i] = le16_to_cpu(buf[i]);
299#endif /* __BIG_ENDIAN */
300}
301
302static u64 ata_id_n_sectors(const u16 *id)
303{
304 if (ata_id_has_lba(id)) {
305 if (ata_id_has_lba48(id))
306 return ata_id_u64(id, 100);
307 else
308 return ata_id_u32(id, 60);
309 } else {
310 if (ata_id_current_chs_valid(id))
311 return ata_id_u32(id, 57);
312 else
313 return id[1] * id[3] * id[6];
314 }
315}
316
317static void ata_id_string(const u16 *id, unsigned char *s, unsigned int ofs,
318 unsigned int len)
319{
320 unsigned int c;
321
322 while (len > 0) {
323 c = id[ofs] >> 8;
324 *s = c;
325 s++;
326
327 c = id[ofs] & 0xff;
328 *s = c;
329 s++;
330
331 ofs++;
332 len -= 2;
333 }
334}
335
336static void ata_id_c_string(const u16 *id, unsigned char *s, unsigned int ofs,
337 unsigned int len)
338{
339 unsigned char *p;
340
341 WARN_ON(!(len & 1));
342
343 ata_id_string(id, s, ofs, len - 1);
344
345 p = s + strnlen(s, len - 1);
346 while (p > s && p[-1] == ' ')
347 p--;
348 *p = '\0';
349}
350
351static int ps3disk_identify(struct ps3_storage_device *dev)
352{
353 struct ps3disk_private *priv = ps3_system_bus_get_drvdata(&dev->sbd);
354 struct lv1_ata_cmnd_block ata_cmnd;
355 u16 *id = dev->bounce_buf;
356 u64 res;
357
358 dev_dbg(&dev->sbd.core, "%s:%u: identify disk\n", __func__, __LINE__);
359
360 memset(&ata_cmnd, 0, sizeof(struct lv1_ata_cmnd_block));
361 ata_cmnd.command = ATA_CMD_ID_ATA;
362 ata_cmnd.sector_count = 1;
363 ata_cmnd.size = ata_cmnd.arglen = ATA_ID_WORDS * 2;
364 ata_cmnd.buffer = dev->bounce_lpar;
365 ata_cmnd.proto = PIO_DATA_IN_PROTO;
366 ata_cmnd.in_out = DIR_READ;
367
368 res = ps3stor_send_command(dev, LV1_STORAGE_SEND_ATA_COMMAND,
369 ps3_mm_phys_to_lpar(__pa(&ata_cmnd)),
370 sizeof(ata_cmnd), ata_cmnd.buffer,
371 ata_cmnd.arglen);
372 if (res) {
373 dev_err(&dev->sbd.core, "%s:%u: identify disk failed 0x%llx\n",
374 __func__, __LINE__, res);
375 return -EIO;
376 }
377
378 swap_buf_le16(id, ATA_ID_WORDS);
379
380 /* All we're interested in are raw capacity and model name */
381 priv->raw_capacity = ata_id_n_sectors(id);
382 ata_id_c_string(id, priv->model, ATA_ID_PROD, sizeof(priv->model));
383 return 0;
384}
385
386static unsigned long ps3disk_mask;
387
388static DEFINE_MUTEX(ps3disk_mask_mutex);
389
390static const struct blk_mq_ops ps3disk_mq_ops = {
391 .queue_rq = ps3disk_queue_rq,
392};
393
394static int ps3disk_probe(struct ps3_system_bus_device *_dev)
395{
396 struct ps3_storage_device *dev = to_ps3_storage_device(&_dev->core);
397 struct ps3disk_private *priv;
398 int error;
399 unsigned int devidx;
400 struct request_queue *queue;
401 struct gendisk *gendisk;
402
403 if (dev->blk_size < 512) {
404 dev_err(&dev->sbd.core,
405 "%s:%u: cannot handle block size %llu\n", __func__,
406 __LINE__, dev->blk_size);
407 return -EINVAL;
408 }
409
410 BUILD_BUG_ON(PS3DISK_MAX_DISKS > BITS_PER_LONG);
411 mutex_lock(&ps3disk_mask_mutex);
412 devidx = find_first_zero_bit(&ps3disk_mask, PS3DISK_MAX_DISKS);
413 if (devidx >= PS3DISK_MAX_DISKS) {
414 dev_err(&dev->sbd.core, "%s:%u: Too many disks\n", __func__,
415 __LINE__);
416 mutex_unlock(&ps3disk_mask_mutex);
417 return -ENOSPC;
418 }
419 __set_bit(devidx, &ps3disk_mask);
420 mutex_unlock(&ps3disk_mask_mutex);
421
422 priv = kzalloc(sizeof(*priv), GFP_KERNEL);
423 if (!priv) {
424 error = -ENOMEM;
425 goto fail;
426 }
427
428 ps3_system_bus_set_drvdata(_dev, priv);
429 spin_lock_init(&priv->lock);
430
431 dev->bounce_size = BOUNCE_SIZE;
432 dev->bounce_buf = kmalloc(BOUNCE_SIZE, GFP_DMA);
433 if (!dev->bounce_buf) {
434 error = -ENOMEM;
435 goto fail_free_priv;
436 }
437
438 error = ps3stor_setup(dev, ps3disk_interrupt);
439 if (error)
440 goto fail_free_bounce;
441
442 ps3disk_identify(dev);
443
444 queue = blk_mq_init_sq_queue(&priv->tag_set, &ps3disk_mq_ops, 1,
445 BLK_MQ_F_SHOULD_MERGE);
446 if (IS_ERR(queue)) {
447 dev_err(&dev->sbd.core, "%s:%u: blk_mq_init_queue failed\n",
448 __func__, __LINE__);
449 error = PTR_ERR(queue);
450 goto fail_teardown;
451 }
452
453 priv->queue = queue;
454 queue->queuedata = dev;
455
456 blk_queue_max_hw_sectors(queue, dev->bounce_size >> 9);
457 blk_queue_dma_alignment(queue, dev->blk_size-1);
458 blk_queue_logical_block_size(queue, dev->blk_size);
459
460 blk_queue_write_cache(queue, true, false);
461
462 blk_queue_max_segments(queue, -1);
463 blk_queue_max_segment_size(queue, dev->bounce_size);
464
465 gendisk = alloc_disk(PS3DISK_MINORS);
466 if (!gendisk) {
467 dev_err(&dev->sbd.core, "%s:%u: alloc_disk failed\n", __func__,
468 __LINE__);
469 error = -ENOMEM;
470 goto fail_cleanup_queue;
471 }
472
473 priv->gendisk = gendisk;
474 gendisk->major = ps3disk_major;
475 gendisk->first_minor = devidx * PS3DISK_MINORS;
476 gendisk->fops = &ps3disk_fops;
477 gendisk->queue = queue;
478 gendisk->private_data = dev;
479 snprintf(gendisk->disk_name, sizeof(gendisk->disk_name), PS3DISK_NAME,
480 devidx+'a');
481 priv->blocking_factor = dev->blk_size >> 9;
482 set_capacity(gendisk,
483 dev->regions[dev->region_idx].size*priv->blocking_factor);
484
485 dev_info(&dev->sbd.core,
486 "%s is a %s (%llu MiB total, %llu MiB for OtherOS)\n",
487 gendisk->disk_name, priv->model, priv->raw_capacity >> 11,
488 get_capacity(gendisk) >> 11);
489
490 device_add_disk(&dev->sbd.core, gendisk, NULL);
491 return 0;
492
493fail_cleanup_queue:
494 blk_cleanup_queue(queue);
495 blk_mq_free_tag_set(&priv->tag_set);
496fail_teardown:
497 ps3stor_teardown(dev);
498fail_free_bounce:
499 kfree(dev->bounce_buf);
500fail_free_priv:
501 kfree(priv);
502 ps3_system_bus_set_drvdata(_dev, NULL);
503fail:
504 mutex_lock(&ps3disk_mask_mutex);
505 __clear_bit(devidx, &ps3disk_mask);
506 mutex_unlock(&ps3disk_mask_mutex);
507 return error;
508}
509
510static int ps3disk_remove(struct ps3_system_bus_device *_dev)
511{
512 struct ps3_storage_device *dev = to_ps3_storage_device(&_dev->core);
513 struct ps3disk_private *priv = ps3_system_bus_get_drvdata(&dev->sbd);
514
515 mutex_lock(&ps3disk_mask_mutex);
516 __clear_bit(MINOR(disk_devt(priv->gendisk)) / PS3DISK_MINORS,
517 &ps3disk_mask);
518 mutex_unlock(&ps3disk_mask_mutex);
519 del_gendisk(priv->gendisk);
520 blk_cleanup_queue(priv->queue);
521 blk_mq_free_tag_set(&priv->tag_set);
522 put_disk(priv->gendisk);
523 dev_notice(&dev->sbd.core, "Synchronizing disk cache\n");
524 ps3disk_sync_cache(dev);
525 ps3stor_teardown(dev);
526 kfree(dev->bounce_buf);
527 kfree(priv);
528 ps3_system_bus_set_drvdata(_dev, NULL);
529 return 0;
530}
531
532static struct ps3_system_bus_driver ps3disk = {
533 .match_id = PS3_MATCH_ID_STOR_DISK,
534 .core.name = DEVICE_NAME,
535 .core.owner = THIS_MODULE,
536 .probe = ps3disk_probe,
537 .remove = ps3disk_remove,
538 .shutdown = ps3disk_remove,
539};
540
541
542static int __init ps3disk_init(void)
543{
544 int error;
545
546 if (!firmware_has_feature(FW_FEATURE_PS3_LV1))
547 return -ENODEV;
548
549 error = register_blkdev(0, DEVICE_NAME);
550 if (error <= 0) {
551 printk(KERN_ERR "%s:%u: register_blkdev failed %d\n", __func__,
552 __LINE__, error);
553 return error;
554 }
555 ps3disk_major = error;
556
557 pr_info("%s:%u: registered block device major %d\n", __func__,
558 __LINE__, ps3disk_major);
559
560 error = ps3_system_bus_driver_register(&ps3disk);
561 if (error)
562 unregister_blkdev(ps3disk_major, DEVICE_NAME);
563
564 return error;
565}
566
567static void __exit ps3disk_exit(void)
568{
569 ps3_system_bus_driver_unregister(&ps3disk);
570 unregister_blkdev(ps3disk_major, DEVICE_NAME);
571}
572
573module_init(ps3disk_init);
574module_exit(ps3disk_exit);
575
576MODULE_LICENSE("GPL");
577MODULE_DESCRIPTION("PS3 Disk Storage Driver");
578MODULE_AUTHOR("Sony Corporation");
579MODULE_ALIAS(PS3_MODULE_ALIAS_STOR_DISK);