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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 %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 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%llx\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_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 end_request(req, 0);
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 = dev->sbd.core.driver_data;
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 unsigned long num_sectors;
235 const char *op;
236
237 res = lv1_storage_get_async_status(dev->sbd.dev_id, &tag, &status);
238
239 if (tag != dev->tag)
240 dev_err(&dev->sbd.core,
241 "%s:%u: tag mismatch, got %llx, expected %llx\n",
242 __func__, __LINE__, tag, dev->tag);
243
244 if (res) {
245 dev_err(&dev->sbd.core, "%s:%u: res=%d status=0x%llx\n",
246 __func__, __LINE__, res, status);
247 return IRQ_HANDLED;
248 }
249
250 priv = dev->sbd.core.driver_data;
251 req = priv->req;
252 if (!req) {
253 dev_dbg(&dev->sbd.core,
254 "%s:%u non-block layer request completed\n", __func__,
255 __LINE__);
256 dev->lv1_status = status;
257 complete(&dev->done);
258 return IRQ_HANDLED;
259 }
260
261 if (req->cmd_type == REQ_TYPE_LINUX_BLOCK &&
262 req->cmd[0] == REQ_LB_OP_FLUSH) {
263 read = 0;
264 num_sectors = req->hard_cur_sectors;
265 op = "flush";
266 } else {
267 read = !rq_data_dir(req);
268 num_sectors = req->nr_sectors;
269 op = read ? "read" : "write";
270 }
271 if (status) {
272 dev_dbg(&dev->sbd.core, "%s:%u: %s failed 0x%llx\n", __func__,
273 __LINE__, op, status);
274 error = -EIO;
275 } else {
276 dev_dbg(&dev->sbd.core, "%s:%u: %s completed\n", __func__,
277 __LINE__, op);
278 error = 0;
279 if (read)
280 ps3disk_scatter_gather(dev, req, 0);
281 }
282
283 spin_lock(&priv->lock);
284 __blk_end_request(req, error, num_sectors << 9);
285 priv->req = NULL;
286 ps3disk_do_request(dev, priv->queue);
287 spin_unlock(&priv->lock);
288
289 return IRQ_HANDLED;
290}
291
292static int ps3disk_sync_cache(struct ps3_storage_device *dev)
293{
294 u64 res;
295
296 dev_dbg(&dev->sbd.core, "%s:%u: sync cache\n", __func__, __LINE__);
297
298 res = ps3stor_send_command(dev, LV1_STORAGE_ATA_HDDOUT, 0, 0, 0, 0);
299 if (res) {
300 dev_err(&dev->sbd.core, "%s:%u: sync cache failed 0x%llx\n",
301 __func__, __LINE__, res);
302 return -EIO;
303 }
304 return 0;
305}
306
307
308
309
310static void swap_buf_le16(u16 *buf, unsigned int buf_words)
311{
312#ifdef __BIG_ENDIAN
313 unsigned int i;
314
315 for (i = 0; i < buf_words; i++)
316 buf[i] = le16_to_cpu(buf[i]);
317#endif
318}
319
320static u64 ata_id_n_sectors(const u16 *id)
321{
322 if (ata_id_has_lba(id)) {
323 if (ata_id_has_lba48(id))
324 return ata_id_u64(id, 100);
325 else
326 return ata_id_u32(id, 60);
327 } else {
328 if (ata_id_current_chs_valid(id))
329 return ata_id_u32(id, 57);
330 else
331 return id[1] * id[3] * id[6];
332 }
333}
334
335static void ata_id_string(const u16 *id, unsigned char *s, unsigned int ofs,
336 unsigned int len)
337{
338 unsigned int c;
339
340 while (len > 0) {
341 c = id[ofs] >> 8;
342 *s = c;
343 s++;
344
345 c = id[ofs] & 0xff;
346 *s = c;
347 s++;
348
349 ofs++;
350 len -= 2;
351 }
352}
353
354static void ata_id_c_string(const u16 *id, unsigned char *s, unsigned int ofs,
355 unsigned int len)
356{
357 unsigned char *p;
358
359 WARN_ON(!(len & 1));
360
361 ata_id_string(id, s, ofs, len - 1);
362
363 p = s + strnlen(s, len - 1);
364 while (p > s && p[-1] == ' ')
365 p--;
366 *p = '\0';
367}
368
369static int ps3disk_identify(struct ps3_storage_device *dev)
370{
371 struct ps3disk_private *priv = dev->sbd.core.driver_data;
372 struct lv1_ata_cmnd_block ata_cmnd;
373 u16 *id = dev->bounce_buf;
374 u64 res;
375
376 dev_dbg(&dev->sbd.core, "%s:%u: identify disk\n", __func__, __LINE__);
377
378 memset(&ata_cmnd, 0, sizeof(struct lv1_ata_cmnd_block));
379 ata_cmnd.command = ATA_CMD_ID_ATA;
380 ata_cmnd.sector_count = 1;
381 ata_cmnd.size = ata_cmnd.arglen = ATA_ID_WORDS * 2;
382 ata_cmnd.buffer = dev->bounce_lpar;
383 ata_cmnd.proto = PIO_DATA_IN_PROTO;
384 ata_cmnd.in_out = DIR_READ;
385
386 res = ps3stor_send_command(dev, LV1_STORAGE_SEND_ATA_COMMAND,
387 ps3_mm_phys_to_lpar(__pa(&ata_cmnd)),
388 sizeof(ata_cmnd), ata_cmnd.buffer,
389 ata_cmnd.arglen);
390 if (res) {
391 dev_err(&dev->sbd.core, "%s:%u: identify disk failed 0x%llx\n",
392 __func__, __LINE__, res);
393 return -EIO;
394 }
395
396 swap_buf_le16(id, ATA_ID_WORDS);
397
398
399 priv->raw_capacity = ata_id_n_sectors(id);
400 ata_id_c_string(id, priv->model, ATA_ID_PROD, sizeof(priv->model));
401 return 0;
402}
403
404static void ps3disk_prepare_flush(struct request_queue *q, struct request *req)
405{
406 struct ps3_storage_device *dev = q->queuedata;
407
408 dev_dbg(&dev->sbd.core, "%s:%u\n", __func__, __LINE__);
409
410 req->cmd_type = REQ_TYPE_LINUX_BLOCK;
411 req->cmd[0] = REQ_LB_OP_FLUSH;
412}
413
414static unsigned long ps3disk_mask;
415
416static DEFINE_MUTEX(ps3disk_mask_mutex);
417
418static int __devinit ps3disk_probe(struct ps3_system_bus_device *_dev)
419{
420 struct ps3_storage_device *dev = to_ps3_storage_device(&_dev->core);
421 struct ps3disk_private *priv;
422 int error;
423 unsigned int devidx;
424 struct request_queue *queue;
425 struct gendisk *gendisk;
426
427 if (dev->blk_size < 512) {
428 dev_err(&dev->sbd.core,
429 "%s:%u: cannot handle block size %llu\n", __func__,
430 __LINE__, dev->blk_size);
431 return -EINVAL;
432 }
433
434 BUILD_BUG_ON(PS3DISK_MAX_DISKS > BITS_PER_LONG);
435 mutex_lock(&ps3disk_mask_mutex);
436 devidx = find_first_zero_bit(&ps3disk_mask, PS3DISK_MAX_DISKS);
437 if (devidx >= PS3DISK_MAX_DISKS) {
438 dev_err(&dev->sbd.core, "%s:%u: Too many disks\n", __func__,
439 __LINE__);
440 mutex_unlock(&ps3disk_mask_mutex);
441 return -ENOSPC;
442 }
443 __set_bit(devidx, &ps3disk_mask);
444 mutex_unlock(&ps3disk_mask_mutex);
445
446 priv = kzalloc(sizeof(*priv), GFP_KERNEL);
447 if (!priv) {
448 error = -ENOMEM;
449 goto fail;
450 }
451
452 dev->sbd.core.driver_data = priv;
453 spin_lock_init(&priv->lock);
454
455 dev->bounce_size = BOUNCE_SIZE;
456 dev->bounce_buf = kmalloc(BOUNCE_SIZE, GFP_DMA);
457 if (!dev->bounce_buf) {
458 error = -ENOMEM;
459 goto fail_free_priv;
460 }
461
462 error = ps3stor_setup(dev, ps3disk_interrupt);
463 if (error)
464 goto fail_free_bounce;
465
466 ps3disk_identify(dev);
467
468 queue = blk_init_queue(ps3disk_request, &priv->lock);
469 if (!queue) {
470 dev_err(&dev->sbd.core, "%s:%u: blk_init_queue failed\n",
471 __func__, __LINE__);
472 error = -ENOMEM;
473 goto fail_teardown;
474 }
475
476 priv->queue = queue;
477 queue->queuedata = dev;
478
479 blk_queue_bounce_limit(queue, BLK_BOUNCE_HIGH);
480
481 blk_queue_max_sectors(queue, dev->bounce_size >> 9);
482 blk_queue_segment_boundary(queue, -1UL);
483 blk_queue_dma_alignment(queue, dev->blk_size-1);
484 blk_queue_hardsect_size(queue, dev->blk_size);
485
486 blk_queue_ordered(queue, QUEUE_ORDERED_DRAIN_FLUSH,
487 ps3disk_prepare_flush);
488
489 blk_queue_max_phys_segments(queue, -1);
490 blk_queue_max_hw_segments(queue, -1);
491 blk_queue_max_segment_size(queue, dev->bounce_size);
492
493 gendisk = alloc_disk(PS3DISK_MINORS);
494 if (!gendisk) {
495 dev_err(&dev->sbd.core, "%s:%u: alloc_disk failed\n", __func__,
496 __LINE__);
497 error = -ENOMEM;
498 goto fail_cleanup_queue;
499 }
500
501 priv->gendisk = gendisk;
502 gendisk->major = ps3disk_major;
503 gendisk->first_minor = devidx * PS3DISK_MINORS;
504 gendisk->fops = &ps3disk_fops;
505 gendisk->queue = queue;
506 gendisk->private_data = dev;
507 gendisk->driverfs_dev = &dev->sbd.core;
508 snprintf(gendisk->disk_name, sizeof(gendisk->disk_name), PS3DISK_NAME,
509 devidx+'a');
510 priv->blocking_factor = dev->blk_size >> 9;
511 set_capacity(gendisk,
512 dev->regions[dev->region_idx].size*priv->blocking_factor);
513
514 dev_info(&dev->sbd.core,
515 "%s is a %s (%llu MiB total, %lu MiB for OtherOS)\n",
516 gendisk->disk_name, priv->model, priv->raw_capacity >> 11,
517 get_capacity(gendisk) >> 11);
518
519 add_disk(gendisk);
520 return 0;
521
522fail_cleanup_queue:
523 blk_cleanup_queue(queue);
524fail_teardown:
525 ps3stor_teardown(dev);
526fail_free_bounce:
527 kfree(dev->bounce_buf);
528fail_free_priv:
529 kfree(priv);
530 dev->sbd.core.driver_data = NULL;
531fail:
532 mutex_lock(&ps3disk_mask_mutex);
533 __clear_bit(devidx, &ps3disk_mask);
534 mutex_unlock(&ps3disk_mask_mutex);
535 return error;
536}
537
538static int ps3disk_remove(struct ps3_system_bus_device *_dev)
539{
540 struct ps3_storage_device *dev = to_ps3_storage_device(&_dev->core);
541 struct ps3disk_private *priv = dev->sbd.core.driver_data;
542
543 mutex_lock(&ps3disk_mask_mutex);
544 __clear_bit(MINOR(disk_devt(priv->gendisk)) / PS3DISK_MINORS,
545 &ps3disk_mask);
546 mutex_unlock(&ps3disk_mask_mutex);
547 del_gendisk(priv->gendisk);
548 blk_cleanup_queue(priv->queue);
549 put_disk(priv->gendisk);
550 dev_notice(&dev->sbd.core, "Synchronizing disk cache\n");
551 ps3disk_sync_cache(dev);
552 ps3stor_teardown(dev);
553 kfree(dev->bounce_buf);
554 kfree(priv);
555 dev->sbd.core.driver_data = NULL;
556 return 0;
557}
558
559static struct ps3_system_bus_driver ps3disk = {
560 .match_id = PS3_MATCH_ID_STOR_DISK,
561 .core.name = DEVICE_NAME,
562 .core.owner = THIS_MODULE,
563 .probe = ps3disk_probe,
564 .remove = ps3disk_remove,
565 .shutdown = ps3disk_remove,
566};
567
568
569static int __init ps3disk_init(void)
570{
571 int error;
572
573 if (!firmware_has_feature(FW_FEATURE_PS3_LV1))
574 return -ENODEV;
575
576 error = register_blkdev(0, DEVICE_NAME);
577 if (error <= 0) {
578 printk(KERN_ERR "%s:%u: register_blkdev failed %d\n", __func__,
579 __LINE__, error);
580 return error;
581 }
582 ps3disk_major = error;
583
584 pr_info("%s:%u: registered block device major %d\n", __func__,
585 __LINE__, ps3disk_major);
586
587 error = ps3_system_bus_driver_register(&ps3disk);
588 if (error)
589 unregister_blkdev(ps3disk_major, DEVICE_NAME);
590
591 return error;
592}
593
594static void __exit ps3disk_exit(void)
595{
596 ps3_system_bus_driver_unregister(&ps3disk);
597 unregister_blkdev(ps3disk_major, DEVICE_NAME);
598}
599
600module_init(ps3disk_init);
601module_exit(ps3disk_exit);
602
603MODULE_LICENSE("GPL");
604MODULE_DESCRIPTION("PS3 Disk Storage Driver");
605MODULE_AUTHOR("Sony Corporation");
606MODULE_ALIAS(PS3_MODULE_ALIAS_STOR_DISK);
607
