This source file includes following definitions.
- ps3disk_scatter_gather
- ps3disk_submit_request_sg
- ps3disk_submit_flush_request
- ps3disk_do_request
- ps3disk_queue_rq
- ps3disk_interrupt
- ps3disk_sync_cache
- swap_buf_le16
- ata_id_n_sectors
- ata_id_string
- ata_id_c_string
- ps3disk_identify
- ps3disk_probe
- ps3disk_remove
- ps3disk_init
- ps3disk_exit
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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
30 struct ps3disk_private {
31 spinlock_t lock;
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
45 struct 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
61 enum 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
68 enum lv1_ata_in_out {
69 DIR_WRITE = 0,
70 DIR_READ = 1
71 };
72
73 static int ps3disk_major;
74
75
76 static const struct block_device_operations ps3disk_fops = {
77 .owner = THIS_MODULE,
78 };
79
80
81 static 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
110 static 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
157 static 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
178 static 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
195 static 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
212 static 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
274 static 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
291
292 static 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
300 }
301
302 static 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
317 static 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
336 static 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
351 static 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
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
386 static unsigned long ps3disk_mask;
387
388 static DEFINE_MUTEX(ps3disk_mask_mutex);
389
390 static const struct blk_mq_ops ps3disk_mq_ops = {
391 .queue_rq = ps3disk_queue_rq,
392 };
393
394 static 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_segment_boundary(queue, -1UL);
458 blk_queue_dma_alignment(queue, dev->blk_size-1);
459 blk_queue_logical_block_size(queue, dev->blk_size);
460
461 blk_queue_write_cache(queue, true, false);
462
463 blk_queue_max_segments(queue, -1);
464 blk_queue_max_segment_size(queue, dev->bounce_size);
465
466 gendisk = alloc_disk(PS3DISK_MINORS);
467 if (!gendisk) {
468 dev_err(&dev->sbd.core, "%s:%u: alloc_disk failed\n", __func__,
469 __LINE__);
470 error = -ENOMEM;
471 goto fail_cleanup_queue;
472 }
473
474 priv->gendisk = gendisk;
475 gendisk->major = ps3disk_major;
476 gendisk->first_minor = devidx * PS3DISK_MINORS;
477 gendisk->fops = &ps3disk_fops;
478 gendisk->queue = queue;
479 gendisk->private_data = dev;
480 snprintf(gendisk->disk_name, sizeof(gendisk->disk_name), PS3DISK_NAME,
481 devidx+'a');
482 priv->blocking_factor = dev->blk_size >> 9;
483 set_capacity(gendisk,
484 dev->regions[dev->region_idx].size*priv->blocking_factor);
485
486 dev_info(&dev->sbd.core,
487 "%s is a %s (%llu MiB total, %llu MiB for OtherOS)\n",
488 gendisk->disk_name, priv->model, priv->raw_capacity >> 11,
489 get_capacity(gendisk) >> 11);
490
491 device_add_disk(&dev->sbd.core, gendisk, NULL);
492 return 0;
493
494 fail_cleanup_queue:
495 blk_cleanup_queue(queue);
496 blk_mq_free_tag_set(&priv->tag_set);
497 fail_teardown:
498 ps3stor_teardown(dev);
499 fail_free_bounce:
500 kfree(dev->bounce_buf);
501 fail_free_priv:
502 kfree(priv);
503 ps3_system_bus_set_drvdata(_dev, NULL);
504 fail:
505 mutex_lock(&ps3disk_mask_mutex);
506 __clear_bit(devidx, &ps3disk_mask);
507 mutex_unlock(&ps3disk_mask_mutex);
508 return error;
509 }
510
511 static int ps3disk_remove(struct ps3_system_bus_device *_dev)
512 {
513 struct ps3_storage_device *dev = to_ps3_storage_device(&_dev->core);
514 struct ps3disk_private *priv = ps3_system_bus_get_drvdata(&dev->sbd);
515
516 mutex_lock(&ps3disk_mask_mutex);
517 __clear_bit(MINOR(disk_devt(priv->gendisk)) / PS3DISK_MINORS,
518 &ps3disk_mask);
519 mutex_unlock(&ps3disk_mask_mutex);
520 del_gendisk(priv->gendisk);
521 blk_cleanup_queue(priv->queue);
522 blk_mq_free_tag_set(&priv->tag_set);
523 put_disk(priv->gendisk);
524 dev_notice(&dev->sbd.core, "Synchronizing disk cache\n");
525 ps3disk_sync_cache(dev);
526 ps3stor_teardown(dev);
527 kfree(dev->bounce_buf);
528 kfree(priv);
529 ps3_system_bus_set_drvdata(_dev, NULL);
530 return 0;
531 }
532
533 static struct ps3_system_bus_driver ps3disk = {
534 .match_id = PS3_MATCH_ID_STOR_DISK,
535 .core.name = DEVICE_NAME,
536 .core.owner = THIS_MODULE,
537 .probe = ps3disk_probe,
538 .remove = ps3disk_remove,
539 .shutdown = ps3disk_remove,
540 };
541
542
543 static int __init ps3disk_init(void)
544 {
545 int error;
546
547 if (!firmware_has_feature(FW_FEATURE_PS3_LV1))
548 return -ENODEV;
549
550 error = register_blkdev(0, DEVICE_NAME);
551 if (error <= 0) {
552 printk(KERN_ERR "%s:%u: register_blkdev failed %d\n", __func__,
553 __LINE__, error);
554 return error;
555 }
556 ps3disk_major = error;
557
558 pr_info("%s:%u: registered block device major %d\n", __func__,
559 __LINE__, ps3disk_major);
560
561 error = ps3_system_bus_driver_register(&ps3disk);
562 if (error)
563 unregister_blkdev(ps3disk_major, DEVICE_NAME);
564
565 return error;
566 }
567
568 static void __exit ps3disk_exit(void)
569 {
570 ps3_system_bus_driver_unregister(&ps3disk);
571 unregister_blkdev(ps3disk_major, DEVICE_NAME);
572 }
573
574 module_init(ps3disk_init);
575 module_exit(ps3disk_exit);
576
577 MODULE_LICENSE("GPL");
578 MODULE_DESCRIPTION("PS3 Disk Storage Driver");
579 MODULE_AUTHOR("Sony Corporation");
580 MODULE_ALIAS(PS3_MODULE_ALIAS_STOR_DISK);