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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 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 = dev->sbd.core.driver_data;
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 %lu sectors %lu hard sectors\n",
138 __func__, __LINE__, op, n, req->nr_sectors,
139 req->hard_nr_sectors);
140#endif
141
142 start_sector = req->sector * priv->blocking_factor;
143 sectors = req->nr_sectors * priv->blocking_factor;
144 dev_dbg(&dev->sbd.core, "%s:%u: %s %lu sectors starting at %lu\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 end_request(req, 0);
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 = dev->sbd.core.driver_data;
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%lx\n",
182 __func__, __LINE__, res);
183 end_request(req, 0);
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 = elv_next_request(q))) {
199 if (blk_fs_request(req)) {
200 if (ps3disk_submit_request_sg(dev, req))
201 break;
202 } else if (req->cmd_type == REQ_TYPE_FLUSH) {
203 if (ps3disk_submit_flush_request(dev, req))
204 break;
205 } else {
206 blk_dump_rq_flags(req, DEVICE_NAME " bad request");
207 end_request(req, 0);
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 = dev->sbd.core.driver_data;
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 unsigned long num_sectors;
234 const char *op;
235
236 res = lv1_storage_get_async_status(dev->sbd.dev_id, &tag, &status);
237
238 if (tag != dev->tag)
239 dev_err(&dev->sbd.core,
240 "%s:%u: tag mismatch, got %lx, expected %lx\n",
241 __func__, __LINE__, tag, dev->tag);
242
243 if (res) {
244 dev_err(&dev->sbd.core, "%s:%u: res=%d status=0x%lx\n",
245 __func__, __LINE__, res, status);
246 return IRQ_HANDLED;
247 }
248
249 priv = dev->sbd.core.driver_data;
250 req = priv->req;
251 if (!req) {
252 dev_dbg(&dev->sbd.core,
253 "%s:%u non-block layer request completed\n", __func__,
254 __LINE__);
255 dev->lv1_status = status;
256 complete(&dev->done);
257 return IRQ_HANDLED;
258 }
259
260 if (req->cmd_type == REQ_TYPE_FLUSH) {
261 read = 0;
262 num_sectors = req->hard_cur_sectors;
263 op = "flush";
264 } else {
265 read = !rq_data_dir(req);
266 num_sectors = req->nr_sectors;
267 op = read ? "read" : "write";
268 }
269 if (status) {
270 dev_dbg(&dev->sbd.core, "%s:%u: %s failed 0x%lx\n", __func__,
271 __LINE__, op, status);
272 error = -EIO;
273 } else {
274 dev_dbg(&dev->sbd.core, "%s:%u: %s completed\n", __func__,
275 __LINE__, op);
276 error = 0;
277 if (read)
278 ps3disk_scatter_gather(dev, req, 0);
279 }
280
281 spin_lock(&priv->lock);
282 __blk_end_request(req, error, num_sectors << 9);
283 priv->req = NULL;
284 ps3disk_do_request(dev, priv->queue);
285 spin_unlock(&priv->lock);
286
287 return IRQ_HANDLED;
288}
289
290static int ps3disk_sync_cache(struct ps3_storage_device *dev)
291{
292 u64 res;
293
294 dev_dbg(&dev->sbd.core, "%s:%u: sync cache\n", __func__, __LINE__);
295
296 res = ps3stor_send_command(dev, LV1_STORAGE_ATA_HDDOUT, 0, 0, 0, 0);
297 if (res) {
298 dev_err(&dev->sbd.core, "%s:%u: sync cache failed 0x%lx\n",
299 __func__, __LINE__, res);
300 return -EIO;
301 }
302 return 0;
303}
304
305
306
307
308static void swap_buf_le16(u16 *buf, unsigned int buf_words)
309{
310#ifdef __BIG_ENDIAN
311 unsigned int i;
312
313 for (i = 0; i < buf_words; i++)
314 buf[i] = le16_to_cpu(buf[i]);
315#endif
316}
317
318static u64 ata_id_n_sectors(const u16 *id)
319{
320 if (ata_id_has_lba(id)) {
321 if (ata_id_has_lba48(id))
322 return ata_id_u64(id, 100);
323 else
324 return ata_id_u32(id, 60);
325 } else {
326 if (ata_id_current_chs_valid(id))
327 return ata_id_u32(id, 57);
328 else
329 return id[1] * id[3] * id[6];
330 }
331}
332
333static void ata_id_string(const u16 *id, unsigned char *s, unsigned int ofs,
334 unsigned int len)
335{
336 unsigned int c;
337
338 while (len > 0) {
339 c = id[ofs] >> 8;
340 *s = c;
341 s++;
342
343 c = id[ofs] & 0xff;
344 *s = c;
345 s++;
346
347 ofs++;
348 len -= 2;
349 }
350}
351
352static void ata_id_c_string(const u16 *id, unsigned char *s, unsigned int ofs,
353 unsigned int len)
354{
355 unsigned char *p;
356
357 WARN_ON(!(len & 1));
358
359 ata_id_string(id, s, ofs, len - 1);
360
361 p = s + strnlen(s, len - 1);
362 while (p > s && p[-1] == ' ')
363 p--;
364 *p = '\0';
365}
366
367static int ps3disk_identify(struct ps3_storage_device *dev)
368{
369 struct ps3disk_private *priv = dev->sbd.core.driver_data;
370 struct lv1_ata_cmnd_block ata_cmnd;
371 u16 *id = dev->bounce_buf;
372 u64 res;
373
374 dev_dbg(&dev->sbd.core, "%s:%u: identify disk\n", __func__, __LINE__);
375
376 memset(&ata_cmnd, 0, sizeof(struct lv1_ata_cmnd_block));
377 ata_cmnd.command = ATA_CMD_ID_ATA;
378 ata_cmnd.sector_count = 1;
379 ata_cmnd.size = ata_cmnd.arglen = ATA_ID_WORDS * 2;
380 ata_cmnd.buffer = dev->bounce_lpar;
381 ata_cmnd.proto = PIO_DATA_IN_PROTO;
382 ata_cmnd.in_out = DIR_READ;
383
384 res = ps3stor_send_command(dev, LV1_STORAGE_SEND_ATA_COMMAND,
385 ps3_mm_phys_to_lpar(__pa(&ata_cmnd)),
386 sizeof(ata_cmnd), ata_cmnd.buffer,
387 ata_cmnd.arglen);
388 if (res) {
389 dev_err(&dev->sbd.core, "%s:%u: identify disk failed 0x%lx\n",
390 __func__, __LINE__, res);
391 return -EIO;
392 }
393
394 swap_buf_le16(id, ATA_ID_WORDS);
395
396
397 priv->raw_capacity = ata_id_n_sectors(id);
398 ata_id_c_string(id, priv->model, ATA_ID_PROD, sizeof(priv->model));
399 return 0;
400}
401
402static void ps3disk_prepare_flush(struct request_queue *q, struct request *req)
403{
404 struct ps3_storage_device *dev = q->queuedata;
405
406 dev_dbg(&dev->sbd.core, "%s:%u\n", __func__, __LINE__);
407
408 req->cmd_type = REQ_TYPE_FLUSH;
409}
410
411static unsigned long ps3disk_mask;
412
413static DEFINE_MUTEX(ps3disk_mask_mutex);
414
415static int __devinit ps3disk_probe(struct ps3_system_bus_device *_dev)
416{
417 struct ps3_storage_device *dev = to_ps3_storage_device(&_dev->core);
418 struct ps3disk_private *priv;
419 int error;
420 unsigned int devidx;
421 struct request_queue *queue;
422 struct gendisk *gendisk;
423
424 if (dev->blk_size < 512) {
425 dev_err(&dev->sbd.core,
426 "%s:%u: cannot handle block size %lu\n", __func__,
427 __LINE__, dev->blk_size);
428 return -EINVAL;
429 }
430
431 BUILD_BUG_ON(PS3DISK_MAX_DISKS > BITS_PER_LONG);
432 mutex_lock(&ps3disk_mask_mutex);
433 devidx = find_first_zero_bit(&ps3disk_mask, PS3DISK_MAX_DISKS);
434 if (devidx >= PS3DISK_MAX_DISKS) {
435 dev_err(&dev->sbd.core, "%s:%u: Too many disks\n", __func__,
436 __LINE__);
437 mutex_unlock(&ps3disk_mask_mutex);
438 return -ENOSPC;
439 }
440 __set_bit(devidx, &ps3disk_mask);
441 mutex_unlock(&ps3disk_mask_mutex);
442
443 priv = kzalloc(sizeof(*priv), GFP_KERNEL);
444 if (!priv) {
445 error = -ENOMEM;
446 goto fail;
447 }
448
449 dev->sbd.core.driver_data = priv;
450 spin_lock_init(&priv->lock);
451
452 dev->bounce_size = BOUNCE_SIZE;
453 dev->bounce_buf = kmalloc(BOUNCE_SIZE, GFP_DMA);
454 if (!dev->bounce_buf) {
455 error = -ENOMEM;
456 goto fail_free_priv;
457 }
458
459 error = ps3stor_setup(dev, ps3disk_interrupt);
460 if (error)
461 goto fail_free_bounce;
462
463 ps3disk_identify(dev);
464
465 queue = blk_init_queue(ps3disk_request, &priv->lock);
466 if (!queue) {
467 dev_err(&dev->sbd.core, "%s:%u: blk_init_queue failed\n",
468 __func__, __LINE__);
469 error = -ENOMEM;
470 goto fail_teardown;
471 }
472
473 priv->queue = queue;
474 queue->queuedata = dev;
475
476 blk_queue_bounce_limit(queue, BLK_BOUNCE_HIGH);
477
478 blk_queue_max_sectors(queue, dev->bounce_size >> 9);
479 blk_queue_segment_boundary(queue, -1UL);
480 blk_queue_dma_alignment(queue, dev->blk_size-1);
481 blk_queue_hardsect_size(queue, dev->blk_size);
482
483 blk_queue_ordered(queue, QUEUE_ORDERED_DRAIN_FLUSH,
484 ps3disk_prepare_flush);
485
486 blk_queue_max_phys_segments(queue, -1);
487 blk_queue_max_hw_segments(queue, -1);
488 blk_queue_max_segment_size(queue, dev->bounce_size);
489
490 gendisk = alloc_disk(PS3DISK_MINORS);
491 if (!gendisk) {
492 dev_err(&dev->sbd.core, "%s:%u: alloc_disk failed\n", __func__,
493 __LINE__);
494 error = -ENOMEM;
495 goto fail_cleanup_queue;
496 }
497
498 priv->gendisk = gendisk;
499 gendisk->major = ps3disk_major;
500 gendisk->first_minor = devidx * PS3DISK_MINORS;
501 gendisk->fops = &ps3disk_fops;
502 gendisk->queue = queue;
503 gendisk->private_data = dev;
504 gendisk->driverfs_dev = &dev->sbd.core;
505 snprintf(gendisk->disk_name, sizeof(gendisk->disk_name), PS3DISK_NAME,
506 devidx+'a');
507 priv->blocking_factor = dev->blk_size >> 9;
508 set_capacity(gendisk,
509 dev->regions[dev->region_idx].size*priv->blocking_factor);
510
511 dev_info(&dev->sbd.core,
512 "%s is a %s (%lu MiB total, %lu MiB for OtherOS)\n",
513 gendisk->disk_name, priv->model, priv->raw_capacity >> 11,
514 get_capacity(gendisk) >> 11);
515
516 add_disk(gendisk);
517 return 0;
518
519fail_cleanup_queue:
520 blk_cleanup_queue(queue);
521fail_teardown:
522 ps3stor_teardown(dev);
523fail_free_bounce:
524 kfree(dev->bounce_buf);
525fail_free_priv:
526 kfree(priv);
527 dev->sbd.core.driver_data = NULL;
528fail:
529 mutex_lock(&ps3disk_mask_mutex);
530 __clear_bit(devidx, &ps3disk_mask);
531 mutex_unlock(&ps3disk_mask_mutex);
532 return error;
533}
534
535static int ps3disk_remove(struct ps3_system_bus_device *_dev)
536{
537 struct ps3_storage_device *dev = to_ps3_storage_device(&_dev->core);
538 struct ps3disk_private *priv = dev->sbd.core.driver_data;
539
540 mutex_lock(&ps3disk_mask_mutex);
541 __clear_bit(priv->gendisk->first_minor / PS3DISK_MINORS,
542 &ps3disk_mask);
543 mutex_unlock(&ps3disk_mask_mutex);
544 del_gendisk(priv->gendisk);
545 blk_cleanup_queue(priv->queue);
546 put_disk(priv->gendisk);
547 dev_notice(&dev->sbd.core, "Synchronizing disk cache\n");
548 ps3disk_sync_cache(dev);
549 ps3stor_teardown(dev);
550 kfree(dev->bounce_buf);
551 kfree(priv);
552 dev->sbd.core.driver_data = NULL;
553 return 0;
554}
555
556static struct ps3_system_bus_driver ps3disk = {
557 .match_id = PS3_MATCH_ID_STOR_DISK,
558 .core.name = DEVICE_NAME,
559 .core.owner = THIS_MODULE,
560 .probe = ps3disk_probe,
561 .remove = ps3disk_remove,
562 .shutdown = ps3disk_remove,
563};
564
565
566static int __init ps3disk_init(void)
567{
568 int error;
569
570 if (!firmware_has_feature(FW_FEATURE_PS3_LV1))
571 return -ENODEV;
572
573 error = register_blkdev(0, DEVICE_NAME);
574 if (error <= 0) {
575 printk(KERN_ERR "%s:%u: register_blkdev failed %d\n", __func__,
576 __LINE__, error);
577 return error;
578 }
579 ps3disk_major = error;
580
581 pr_info("%s:%u: registered block device major %d\n", __func__,
582 __LINE__, ps3disk_major);
583
584 error = ps3_system_bus_driver_register(&ps3disk);
585 if (error)
586 unregister_blkdev(ps3disk_major, DEVICE_NAME);
587
588 return error;
589}
590
591static void __exit ps3disk_exit(void)
592{
593 ps3_system_bus_driver_unregister(&ps3disk);
594 unregister_blkdev(ps3disk_major, DEVICE_NAME);
595}
596
597module_init(ps3disk_init);
598module_exit(ps3disk_exit);
599
600MODULE_LICENSE("GPL");
601MODULE_DESCRIPTION("PS3 Disk Storage Driver");
602MODULE_AUTHOR("Sony Corporation");
603MODULE_ALIAS(PS3_MODULE_ALIAS_STOR_DISK);
604
