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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;
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,
80 DIR_READ = 1
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(bvec, &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 (blk_fs_request(req)) {
200 if (ps3disk_submit_request_sg(dev, req))
201 break;
202 } else if (req->cmd_type == REQ_TYPE_LINUX_BLOCK &&
203 req->cmd[0] == REQ_LB_OP_FLUSH) {
204 if (ps3disk_submit_flush_request(dev, req))
205 break;
206 } else {
207 blk_dump_rq_flags(req, DEVICE_NAME " bad request");
208 __blk_end_request_all(req, -EIO);
209 continue;
210 }
211 }
212}
213
214static void ps3disk_request(struct request_queue *q)
215{
216 struct ps3_storage_device *dev = q->queuedata;
217 struct ps3disk_private *priv = ps3_system_bus_get_drvdata(&dev->sbd);
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, error;
233 u64 tag, status;
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 %llx, expected %llx\n",
241 __func__, __LINE__, tag, dev->tag);
242
243 if (res) {
244 dev_err(&dev->sbd.core, "%s:%u: res=%d status=0x%llx\n",
245 __func__, __LINE__, res, status);
246 return IRQ_HANDLED;
247 }
248
249 priv = ps3_system_bus_get_drvdata(&dev->sbd);
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_LINUX_BLOCK &&
261 req->cmd[0] == REQ_LB_OP_FLUSH) {
262 read = 0;
263 op = "flush";
264 } else {
265 read = !rq_data_dir(req);
266 op = read ? "read" : "write";
267 }
268 if (status) {
269 dev_dbg(&dev->sbd.core, "%s:%u: %s failed 0x%llx\n", __func__,
270 __LINE__, op, status);
271 error = -EIO;
272 } else {
273 dev_dbg(&dev->sbd.core, "%s:%u: %s completed\n", __func__,
274 __LINE__, op);
275 error = 0;
276 if (read)
277 ps3disk_scatter_gather(dev, req, 0);
278 }
279
280 spin_lock(&priv->lock);
281 __blk_end_request_all(req, error);
282 priv->req = NULL;
283 ps3disk_do_request(dev, priv->queue);
284 spin_unlock(&priv->lock);
285
286 return IRQ_HANDLED;
287}
288
289static int ps3disk_sync_cache(struct ps3_storage_device *dev)
290{
291 u64 res;
292
293 dev_dbg(&dev->sbd.core, "%s:%u: sync cache\n", __func__, __LINE__);
294
295 res = ps3stor_send_command(dev, LV1_STORAGE_ATA_HDDOUT, 0, 0, 0, 0);
296 if (res) {
297 dev_err(&dev->sbd.core, "%s:%u: sync cache failed 0x%llx\n",
298 __func__, __LINE__, res);
299 return -EIO;
300 }
301 return 0;
302}
303
304
305
306
307static void swap_buf_le16(u16 *buf, unsigned int buf_words)
308{
309#ifdef __BIG_ENDIAN
310 unsigned int i;
311
312 for (i = 0; i < buf_words; i++)
313 buf[i] = le16_to_cpu(buf[i]);
314#endif
315}
316
317static u64 ata_id_n_sectors(const u16 *id)
318{
319 if (ata_id_has_lba(id)) {
320 if (ata_id_has_lba48(id))
321 return ata_id_u64(id, 100);
322 else
323 return ata_id_u32(id, 60);
324 } else {
325 if (ata_id_current_chs_valid(id))
326 return ata_id_u32(id, 57);
327 else
328 return id[1] * id[3] * id[6];
329 }
330}
331
332static void ata_id_string(const u16 *id, unsigned char *s, unsigned int ofs,
333 unsigned int len)
334{
335 unsigned int c;
336
337 while (len > 0) {
338 c = id[ofs] >> 8;
339 *s = c;
340 s++;
341
342 c = id[ofs] & 0xff;
343 *s = c;
344 s++;
345
346 ofs++;
347 len -= 2;
348 }
349}
350
351static void ata_id_c_string(const u16 *id, unsigned char *s, unsigned int ofs,
352 unsigned int len)
353{
354 unsigned char *p;
355
356 WARN_ON(!(len & 1));
357
358 ata_id_string(id, s, ofs, len - 1);
359
360 p = s + strnlen(s, len - 1);
361 while (p > s && p[-1] == ' ')
362 p--;
363 *p = '\0';
364}
365
366static int ps3disk_identify(struct ps3_storage_device *dev)
367{
368 struct ps3disk_private *priv = ps3_system_bus_get_drvdata(&dev->sbd);
369 struct lv1_ata_cmnd_block ata_cmnd;
370 u16 *id = dev->bounce_buf;
371 u64 res;
372
373 dev_dbg(&dev->sbd.core, "%s:%u: identify disk\n", __func__, __LINE__);
374
375 memset(&ata_cmnd, 0, sizeof(struct lv1_ata_cmnd_block));
376 ata_cmnd.command = ATA_CMD_ID_ATA;
377 ata_cmnd.sector_count = 1;
378 ata_cmnd.size = ata_cmnd.arglen = ATA_ID_WORDS * 2;
379 ata_cmnd.buffer = dev->bounce_lpar;
380 ata_cmnd.proto = PIO_DATA_IN_PROTO;
381 ata_cmnd.in_out = DIR_READ;
382
383 res = ps3stor_send_command(dev, LV1_STORAGE_SEND_ATA_COMMAND,
384 ps3_mm_phys_to_lpar(__pa(&ata_cmnd)),
385 sizeof(ata_cmnd), ata_cmnd.buffer,
386 ata_cmnd.arglen);
387 if (res) {
388 dev_err(&dev->sbd.core, "%s:%u: identify disk failed 0x%llx\n",
389 __func__, __LINE__, res);
390 return -EIO;
391 }
392
393 swap_buf_le16(id, ATA_ID_WORDS);
394
395
396 priv->raw_capacity = ata_id_n_sectors(id);
397 ata_id_c_string(id, priv->model, ATA_ID_PROD, sizeof(priv->model));
398 return 0;
399}
400
401static void ps3disk_prepare_flush(struct request_queue *q, struct request *req)
402{
403 struct ps3_storage_device *dev = q->queuedata;
404
405 dev_dbg(&dev->sbd.core, "%s:%u\n", __func__, __LINE__);
406
407 req->cmd_type = REQ_TYPE_LINUX_BLOCK;
408 req->cmd[0] = REQ_LB_OP_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 %llu\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 ps3_system_bus_set_drvdata(_dev, 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_hw_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_logical_block_size(queue, dev->blk_size);
482
483 blk_queue_ordered(queue, QUEUE_ORDERED_DRAIN_FLUSH,
484 ps3disk_prepare_flush);
485
486 blk_queue_max_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
