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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;
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,
79 DIR_READ = 1
80};
81
82static int ps3disk_major;
83
84
85static const 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 req_iterator iter;
95 struct bio_vec *bvec;
96 unsigned int i = 0;
97 size_t size;
98 void *buf;
99
100 rq_for_each_segment(bvec, req, iter) {
101 unsigned long flags;
102 dev_dbg(&dev->sbd.core,
103 "%s:%u: bio %u: %u segs %u sectors from %lu\n",
104 __func__, __LINE__, i, bio_segments(iter.bio),
105 bio_sectors(iter.bio), iter.bio->bi_sector);
106
107 size = bvec->bv_len;
108 buf = bvec_kmap_irq(bvec, &flags);
109 if (gather)
110 memcpy(dev->bounce_buf+offset, buf, size);
111 else
112 memcpy(buf, dev->bounce_buf+offset, size);
113 offset += size;
114 flush_kernel_dcache_page(bvec->bv_page);
115 bvec_kunmap_irq(bvec, &flags);
116 i++;
117 }
118}
119
120static int ps3disk_submit_request_sg(struct ps3_storage_device *dev,
121 struct request *req)
122{
123 struct ps3disk_private *priv = ps3_system_bus_get_drvdata(&dev->sbd);
124 int write = rq_data_dir(req), res;
125 const char *op = write ? "write" : "read";
126 u64 start_sector, sectors;
127 unsigned int region_id = dev->regions[dev->region_idx].id;
128
129#ifdef DEBUG
130 unsigned int n = 0;
131 struct bio_vec *bv;
132 struct req_iterator iter;
133
134 rq_for_each_segment(bv, req, iter)
135 n++;
136 dev_dbg(&dev->sbd.core,
137 "%s:%u: %s req has %u bvecs for %u sectors\n",
138 __func__, __LINE__, op, n, blk_rq_sectors(req));
139#endif
140
141 start_sector = blk_rq_pos(req) * priv->blocking_factor;
142 sectors = blk_rq_sectors(req) * priv->blocking_factor;
143 dev_dbg(&dev->sbd.core, "%s:%u: %s %llu sectors starting at %llu\n",
144 __func__, __LINE__, op, sectors, start_sector);
145
146 if (write) {
147 ps3disk_scatter_gather(dev, req, 1);
148
149 res = lv1_storage_write(dev->sbd.dev_id, region_id,
150 start_sector, sectors, 0,
151 dev->bounce_lpar, &dev->tag);
152 } else {
153 res = lv1_storage_read(dev->sbd.dev_id, region_id,
154 start_sector, sectors, 0,
155 dev->bounce_lpar, &dev->tag);
156 }
157 if (res) {
158 dev_err(&dev->sbd.core, "%s:%u: %s failed %d\n", __func__,
159 __LINE__, op, res);
160 __blk_end_request_all(req, -EIO);
161 return 0;
162 }
163
164 priv->req = req;
165 return 1;
166}
167
168static int ps3disk_submit_flush_request(struct ps3_storage_device *dev,
169 struct request *req)
170{
171 struct ps3disk_private *priv = ps3_system_bus_get_drvdata(&dev->sbd);
172 u64 res;
173
174 dev_dbg(&dev->sbd.core, "%s:%u: flush request\n", __func__, __LINE__);
175
176 res = lv1_storage_send_device_command(dev->sbd.dev_id,
177 LV1_STORAGE_ATA_HDDOUT, 0, 0, 0,
178 0, &dev->tag);
179 if (res) {
180 dev_err(&dev->sbd.core, "%s:%u: sync cache failed 0x%llx\n",
181 __func__, __LINE__, res);
182 __blk_end_request_all(req, -EIO);
183 return 0;
184 }
185
186 priv->req = req;
187 return 1;
188}
189
190static void ps3disk_do_request(struct ps3_storage_device *dev,
191 struct request_queue *q)
192{
193 struct request *req;
194
195 dev_dbg(&dev->sbd.core, "%s:%u\n", __func__, __LINE__);
196
197 while ((req = blk_fetch_request(q))) {
198 if (blk_fs_request(req)) {
199 if (ps3disk_submit_request_sg(dev, req))
200 break;
201 } else if (req->cmd_type == REQ_TYPE_LINUX_BLOCK &&
202 req->cmd[0] == REQ_LB_OP_FLUSH) {
203 if (ps3disk_submit_flush_request(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_type == REQ_TYPE_LINUX_BLOCK &&
260 req->cmd[0] == REQ_LB_OP_FLUSH) {
261 read = 0;
262 op = "flush";
263 } else {
264 read = !rq_data_dir(req);
265 op = read ? "read" : "write";
266 }
267 if (status) {
268 dev_dbg(&dev->sbd.core, "%s:%u: %s failed 0x%llx\n", __func__,
269 __LINE__, op, status);
270 error = -EIO;
271 } else {
272 dev_dbg(&dev->sbd.core, "%s:%u: %s completed\n", __func__,
273 __LINE__, op);
274 error = 0;
275 if (read)
276 ps3disk_scatter_gather(dev, req, 0);
277 }
278
279 spin_lock(&priv->lock);
280 __blk_end_request_all(req, error);
281 priv->req = NULL;
282 ps3disk_do_request(dev, priv->queue);
283 spin_unlock(&priv->lock);
284
285 return IRQ_HANDLED;
286}
287
288static int ps3disk_sync_cache(struct ps3_storage_device *dev)
289{
290 u64 res;
291
292 dev_dbg(&dev->sbd.core, "%s:%u: sync cache\n", __func__, __LINE__);
293
294 res = ps3stor_send_command(dev, LV1_STORAGE_ATA_HDDOUT, 0, 0, 0, 0);
295 if (res) {
296 dev_err(&dev->sbd.core, "%s:%u: sync cache failed 0x%llx\n",
297 __func__, __LINE__, res);
298 return -EIO;
299 }
300 return 0;
301}
302
303
304
305
306static void swap_buf_le16(u16 *buf, unsigned int buf_words)
307{
308#ifdef __BIG_ENDIAN
309 unsigned int i;
310
311 for (i = 0; i < buf_words; i++)
312 buf[i] = le16_to_cpu(buf[i]);
313#endif
314}
315
316static u64 ata_id_n_sectors(const u16 *id)
317{
318 if (ata_id_has_lba(id)) {
319 if (ata_id_has_lba48(id))
320 return ata_id_u64(id, 100);
321 else
322 return ata_id_u32(id, 60);
323 } else {
324 if (ata_id_current_chs_valid(id))
325 return ata_id_u32(id, 57);
326 else
327 return id[1] * id[3] * id[6];
328 }
329}
330
331static void ata_id_string(const u16 *id, unsigned char *s, unsigned int ofs,
332 unsigned int len)
333{
334 unsigned int c;
335
336 while (len > 0) {
337 c = id[ofs] >> 8;
338 *s = c;
339 s++;
340
341 c = id[ofs] & 0xff;
342 *s = c;
343 s++;
344
345 ofs++;
346 len -= 2;
347 }
348}
349
350static void ata_id_c_string(const u16 *id, unsigned char *s, unsigned int ofs,
351 unsigned int len)
352{
353 unsigned char *p;
354
355 WARN_ON(!(len & 1));
356
357 ata_id_string(id, s, ofs, len - 1);
358
359 p = s + strnlen(s, len - 1);
360 while (p > s && p[-1] == ' ')
361 p--;
362 *p = '\0';
363}
364
365static int ps3disk_identify(struct ps3_storage_device *dev)
366{
367 struct ps3disk_private *priv = ps3_system_bus_get_drvdata(&dev->sbd);
368 struct lv1_ata_cmnd_block ata_cmnd;
369 u16 *id = dev->bounce_buf;
370 u64 res;
371
372 dev_dbg(&dev->sbd.core, "%s:%u: identify disk\n", __func__, __LINE__);
373
374 memset(&ata_cmnd, 0, sizeof(struct lv1_ata_cmnd_block));
375 ata_cmnd.command = ATA_CMD_ID_ATA;
376 ata_cmnd.sector_count = 1;
377 ata_cmnd.size = ata_cmnd.arglen = ATA_ID_WORDS * 2;
378 ata_cmnd.buffer = dev->bounce_lpar;
379 ata_cmnd.proto = PIO_DATA_IN_PROTO;
380 ata_cmnd.in_out = DIR_READ;
381
382 res = ps3stor_send_command(dev, LV1_STORAGE_SEND_ATA_COMMAND,
383 ps3_mm_phys_to_lpar(__pa(&ata_cmnd)),
384 sizeof(ata_cmnd), ata_cmnd.buffer,
385 ata_cmnd.arglen);
386 if (res) {
387 dev_err(&dev->sbd.core, "%s:%u: identify disk failed 0x%llx\n",
388 __func__, __LINE__, res);
389 return -EIO;
390 }
391
392 swap_buf_le16(id, ATA_ID_WORDS);
393
394
395 priv->raw_capacity = ata_id_n_sectors(id);
396 ata_id_c_string(id, priv->model, ATA_ID_PROD, sizeof(priv->model));
397 return 0;
398}
399
400static void ps3disk_prepare_flush(struct request_queue *q, struct request *req)
401{
402 struct ps3_storage_device *dev = q->queuedata;
403
404 dev_dbg(&dev->sbd.core, "%s:%u\n", __func__, __LINE__);
405
406 req->cmd_type = REQ_TYPE_LINUX_BLOCK;
407 req->cmd[0] = REQ_LB_OP_FLUSH;
408}
409
410static unsigned long ps3disk_mask;
411
412static DEFINE_MUTEX(ps3disk_mask_mutex);
413
414static int __devinit ps3disk_probe(struct ps3_system_bus_device *_dev)
415{
416 struct ps3_storage_device *dev = to_ps3_storage_device(&_dev->core);
417 struct ps3disk_private *priv;
418 int error;
419 unsigned int devidx;
420 struct request_queue *queue;
421 struct gendisk *gendisk;
422
423 if (dev->blk_size < 512) {
424 dev_err(&dev->sbd.core,
425 "%s:%u: cannot handle block size %llu\n", __func__,
426 __LINE__, dev->blk_size);
427 return -EINVAL;
428 }
429
430 BUILD_BUG_ON(PS3DISK_MAX_DISKS > BITS_PER_LONG);
431 mutex_lock(&ps3disk_mask_mutex);
432 devidx = find_first_zero_bit(&ps3disk_mask, PS3DISK_MAX_DISKS);
433 if (devidx >= PS3DISK_MAX_DISKS) {
434 dev_err(&dev->sbd.core, "%s:%u: Too many disks\n", __func__,
435 __LINE__);
436 mutex_unlock(&ps3disk_mask_mutex);
437 return -ENOSPC;
438 }
439 __set_bit(devidx, &ps3disk_mask);
440 mutex_unlock(&ps3disk_mask_mutex);
441
442 priv = kzalloc(sizeof(*priv), GFP_KERNEL);
443 if (!priv) {
444 error = -ENOMEM;
445 goto fail;
446 }
447
448 ps3_system_bus_set_drvdata(_dev, priv);
449 spin_lock_init(&priv->lock);
450
451 dev->bounce_size = BOUNCE_SIZE;
452 dev->bounce_buf = kmalloc(BOUNCE_SIZE, GFP_DMA);
453 if (!dev->bounce_buf) {
454 error = -ENOMEM;
455 goto fail_free_priv;
456 }
457
458 error = ps3stor_setup(dev, ps3disk_interrupt);
459 if (error)
460 goto fail_free_bounce;
461
462 ps3disk_identify(dev);
463
464 queue = blk_init_queue(ps3disk_request, &priv->lock);
465 if (!queue) {
466 dev_err(&dev->sbd.core, "%s:%u: blk_init_queue failed\n",
467 __func__, __LINE__);
468 error = -ENOMEM;
469 goto fail_teardown;
470 }
471
472 priv->queue = queue;
473 queue->queuedata = dev;
474
475 blk_queue_bounce_limit(queue, BLK_BOUNCE_HIGH);
476
477 blk_queue_max_sectors(queue, dev->bounce_size >> 9);
478 blk_queue_segment_boundary(queue, -1UL);
479 blk_queue_dma_alignment(queue, dev->blk_size-1);
480 blk_queue_logical_block_size(queue, dev->blk_size);
481
482 blk_queue_ordered(queue, QUEUE_ORDERED_DRAIN_FLUSH,
483 ps3disk_prepare_flush);
484
485 blk_queue_max_phys_segments(queue, -1);
486 blk_queue_max_hw_segments(queue, -1);
487 blk_queue_max_segment_size(queue, dev->bounce_size);
488
489 gendisk = alloc_disk(PS3DISK_MINORS);
490 if (!gendisk) {
491 dev_err(&dev->sbd.core, "%s:%u: alloc_disk failed\n", __func__,
492 __LINE__);
493 error = -ENOMEM;
494 goto fail_cleanup_queue;
495 }
496
497 priv->gendisk = gendisk;
498 gendisk->major = ps3disk_major;
499 gendisk->first_minor = devidx * PS3DISK_MINORS;
500 gendisk->fops = &ps3disk_fops;
501 gendisk->queue = queue;
502 gendisk->private_data = dev;
503 gendisk->driverfs_dev = &dev->sbd.core;
504 snprintf(gendisk->disk_name, sizeof(gendisk->disk_name), PS3DISK_NAME,
505 devidx+'a');
506 priv->blocking_factor = dev->blk_size >> 9;
507 set_capacity(gendisk,
508 dev->regions[dev->region_idx].size*priv->blocking_factor);
509
510 dev_info(&dev->sbd.core,
511 "%s is a %s (%llu MiB total, %lu MiB for OtherOS)\n",
512 gendisk->disk_name, priv->model, priv->raw_capacity >> 11,
513 get_capacity(gendisk) >> 11);
514
515 add_disk(gendisk);
516 return 0;
517
518fail_cleanup_queue:
519 blk_cleanup_queue(queue);
520fail_teardown:
521 ps3stor_teardown(dev);
522fail_free_bounce:
523 kfree(dev->bounce_buf);
524fail_free_priv:
525 kfree(priv);
526 ps3_system_bus_set_drvdata(_dev, NULL);
527fail:
528 mutex_lock(&ps3disk_mask_mutex);
529 __clear_bit(devidx, &ps3disk_mask);
530 mutex_unlock(&ps3disk_mask_mutex);
531 return error;
532}
533
534static int ps3disk_remove(struct ps3_system_bus_device *_dev)
535{
536 struct ps3_storage_device *dev = to_ps3_storage_device(&_dev->core);
537 struct ps3disk_private *priv = ps3_system_bus_get_drvdata(&dev->sbd);
538
539 mutex_lock(&ps3disk_mask_mutex);
540 __clear_bit(MINOR(disk_devt(priv->gendisk)) / PS3DISK_MINORS,
541 &ps3disk_mask);
542 mutex_unlock(&ps3disk_mask_mutex);
543 del_gendisk(priv->gendisk);
544 blk_cleanup_queue(priv->queue);
545 put_disk(priv->gendisk);
546 dev_notice(&dev->sbd.core, "Synchronizing disk cache\n");
547 ps3disk_sync_cache(dev);
548 ps3stor_teardown(dev);
549 kfree(dev->bounce_buf);
550 kfree(priv);
551 ps3_system_bus_set_drvdata(_dev, NULL);
552 return 0;
553}
554
555static struct ps3_system_bus_driver ps3disk = {
556 .match_id = PS3_MATCH_ID_STOR_DISK,
557 .core.name = DEVICE_NAME,
558 .core.owner = THIS_MODULE,
559 .probe = ps3disk_probe,
560 .remove = ps3disk_remove,
561 .shutdown = ps3disk_remove,
562};
563
564
565static int __init ps3disk_init(void)
566{
567 int error;
568
569 if (!firmware_has_feature(FW_FEATURE_PS3_LV1))
570 return -ENODEV;
571
572 error = register_blkdev(0, DEVICE_NAME);
573 if (error <= 0) {
574 printk(KERN_ERR "%s:%u: register_blkdev failed %d\n", __func__,
575 __LINE__, error);
576 return error;
577 }
578 ps3disk_major = error;
579
580 pr_info("%s:%u: registered block device major %d\n", __func__,
581 __LINE__, ps3disk_major);
582
583 error = ps3_system_bus_driver_register(&ps3disk);
584 if (error)
585 unregister_blkdev(ps3disk_major, DEVICE_NAME);
586
587 return error;
588}
589
590static void __exit ps3disk_exit(void)
591{
592 ps3_system_bus_driver_unregister(&ps3disk);
593 unregister_blkdev(ps3disk_major, DEVICE_NAME);
594}
595
596module_init(ps3disk_init);
597module_exit(ps3disk_exit);
598
599MODULE_LICENSE("GPL");
600MODULE_DESCRIPTION("PS3 Disk Storage Driver");
601MODULE_AUTHOR("Sony Corporation");
602MODULE_ALIAS(PS3_MODULE_ALIAS_STOR_DISK);
603
