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21#include <linux/ata.h>
22#include <linux/blkdev.h>
23#include <linux/slab.h>
24#include <linux/module.h>
25
26#include <asm/lv1call.h>
27#include <asm/ps3stor.h>
28#include <asm/firmware.h>
29
30
31#define DEVICE_NAME "ps3disk"
32
33#define BOUNCE_SIZE (64*1024)
34
35#define PS3DISK_MAX_DISKS 16
36#define PS3DISK_MINORS 16
37
38
39#define PS3DISK_NAME "ps3d%c"
40
41
42struct ps3disk_private {
43 spinlock_t lock;
44 struct request_queue *queue;
45 struct gendisk *gendisk;
46 unsigned int blocking_factor;
47 struct request *req;
48 u64 raw_capacity;
49 unsigned char model[ATA_ID_PROD_LEN+1];
50};
51
52
53#define LV1_STORAGE_SEND_ATA_COMMAND (2)
54#define LV1_STORAGE_ATA_HDDOUT (0x23)
55
56struct lv1_ata_cmnd_block {
57 u16 features;
58 u16 sector_count;
59 u16 LBA_low;
60 u16 LBA_mid;
61 u16 LBA_high;
62 u8 device;
63 u8 command;
64 u32 is_ext;
65 u32 proto;
66 u32 in_out;
67 u32 size;
68 u64 buffer;
69 u32 arglen;
70};
71
72enum lv1_ata_proto {
73 NON_DATA_PROTO = 0,
74 PIO_DATA_IN_PROTO = 1,
75 PIO_DATA_OUT_PROTO = 2,
76 DMA_PROTO = 3
77};
78
79enum lv1_ata_in_out {
80 DIR_WRITE = 0,
81 DIR_READ = 1
82};
83
84static int ps3disk_major;
85
86
87static const struct block_device_operations ps3disk_fops = {
88 .owner = THIS_MODULE,
89};
90
91
92static void ps3disk_scatter_gather(struct ps3_storage_device *dev,
93 struct request *req, int gather)
94{
95 unsigned int offset = 0;
96 struct req_iterator iter;
97 struct bio_vec bvec;
98 unsigned int i = 0;
99 size_t size;
100 void *buf;
101
102 rq_for_each_segment(bvec, req, iter) {
103 unsigned long flags;
104 dev_dbg(&dev->sbd.core, "%s:%u: bio %u: %u sectors from %lu\n",
105 __func__, __LINE__, i, bio_sectors(iter.bio),
106 iter.bio->bi_iter.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(buf, &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, BLK_STS_IOERR);
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, BLK_STS_IOERR);
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 switch (req_op(req)) {
200 case REQ_OP_FLUSH:
201 if (ps3disk_submit_flush_request(dev, req))
202 return;
203 break;
204 case REQ_OP_READ:
205 case REQ_OP_WRITE:
206 if (ps3disk_submit_request_sg(dev, req))
207 return;
208 break;
209 default:
210 blk_dump_rq_flags(req, DEVICE_NAME " bad request");
211 __blk_end_request_all(req, BLK_STS_IOERR);
212 }
213 }
214}
215
216static void ps3disk_request(struct request_queue *q)
217{
218 struct ps3_storage_device *dev = q->queuedata;
219 struct ps3disk_private *priv = ps3_system_bus_get_drvdata(&dev->sbd);
220
221 if (priv->req) {
222 dev_dbg(&dev->sbd.core, "%s:%u busy\n", __func__, __LINE__);
223 return;
224 }
225
226 ps3disk_do_request(dev, q);
227}
228
229static irqreturn_t ps3disk_interrupt(int irq, void *data)
230{
231 struct ps3_storage_device *dev = data;
232 struct ps3disk_private *priv;
233 struct request *req;
234 int res, read;
235 blk_status_t error;
236 u64 tag, status;
237 const char *op;
238
239 res = lv1_storage_get_async_status(dev->sbd.dev_id, &tag, &status);
240
241 if (tag != dev->tag)
242 dev_err(&dev->sbd.core,
243 "%s:%u: tag mismatch, got %llx, expected %llx\n",
244 __func__, __LINE__, tag, dev->tag);
245
246 if (res) {
247 dev_err(&dev->sbd.core, "%s:%u: res=%d status=0x%llx\n",
248 __func__, __LINE__, res, status);
249 return IRQ_HANDLED;
250 }
251
252 priv = ps3_system_bus_get_drvdata(&dev->sbd);
253 req = priv->req;
254 if (!req) {
255 dev_dbg(&dev->sbd.core,
256 "%s:%u non-block layer request completed\n", __func__,
257 __LINE__);
258 dev->lv1_status = status;
259 complete(&dev->done);
260 return IRQ_HANDLED;
261 }
262
263 if (req_op(req) == REQ_OP_FLUSH) {
264 read = 0;
265 op = "flush";
266 } else {
267 read = !rq_data_dir(req);
268 op = read ? "read" : "write";
269 }
270 if (status) {
271 dev_dbg(&dev->sbd.core, "%s:%u: %s failed 0x%llx\n", __func__,
272 __LINE__, op, status);
273 error = BLK_STS_IOERR;
274 } else {
275 dev_dbg(&dev->sbd.core, "%s:%u: %s completed\n", __func__,
276 __LINE__, op);
277 error = 0;
278 if (read)
279 ps3disk_scatter_gather(dev, req, 0);
280 }
281
282 spin_lock(&priv->lock);
283 __blk_end_request_all(req, error);
284 priv->req = NULL;
285 ps3disk_do_request(dev, priv->queue);
286 spin_unlock(&priv->lock);
287
288 return IRQ_HANDLED;
289}
290
291static int ps3disk_sync_cache(struct ps3_storage_device *dev)
292{
293 u64 res;
294
295 dev_dbg(&dev->sbd.core, "%s:%u: sync cache\n", __func__, __LINE__);
296
297 res = ps3stor_send_command(dev, LV1_STORAGE_ATA_HDDOUT, 0, 0, 0, 0);
298 if (res) {
299 dev_err(&dev->sbd.core, "%s:%u: sync cache failed 0x%llx\n",
300 __func__, __LINE__, res);
301 return -EIO;
302 }
303 return 0;
304}
305
306
307
308
309static void swap_buf_le16(u16 *buf, unsigned int buf_words)
310{
311#ifdef __BIG_ENDIAN
312 unsigned int i;
313
314 for (i = 0; i < buf_words; i++)
315 buf[i] = le16_to_cpu(buf[i]);
316#endif
317}
318
319static u64 ata_id_n_sectors(const u16 *id)
320{
321 if (ata_id_has_lba(id)) {
322 if (ata_id_has_lba48(id))
323 return ata_id_u64(id, 100);
324 else
325 return ata_id_u32(id, 60);
326 } else {
327 if (ata_id_current_chs_valid(id))
328 return ata_id_u32(id, 57);
329 else
330 return id[1] * id[3] * id[6];
331 }
332}
333
334static void ata_id_string(const u16 *id, unsigned char *s, unsigned int ofs,
335 unsigned int len)
336{
337 unsigned int c;
338
339 while (len > 0) {
340 c = id[ofs] >> 8;
341 *s = c;
342 s++;
343
344 c = id[ofs] & 0xff;
345 *s = c;
346 s++;
347
348 ofs++;
349 len -= 2;
350 }
351}
352
353static void ata_id_c_string(const u16 *id, unsigned char *s, unsigned int ofs,
354 unsigned int len)
355{
356 unsigned char *p;
357
358 WARN_ON(!(len & 1));
359
360 ata_id_string(id, s, ofs, len - 1);
361
362 p = s + strnlen(s, len - 1);
363 while (p > s && p[-1] == ' ')
364 p--;
365 *p = '\0';
366}
367
368static int ps3disk_identify(struct ps3_storage_device *dev)
369{
370 struct ps3disk_private *priv = ps3_system_bus_get_drvdata(&dev->sbd);
371 struct lv1_ata_cmnd_block ata_cmnd;
372 u16 *id = dev->bounce_buf;
373 u64 res;
374
375 dev_dbg(&dev->sbd.core, "%s:%u: identify disk\n", __func__, __LINE__);
376
377 memset(&ata_cmnd, 0, sizeof(struct lv1_ata_cmnd_block));
378 ata_cmnd.command = ATA_CMD_ID_ATA;
379 ata_cmnd.sector_count = 1;
380 ata_cmnd.size = ata_cmnd.arglen = ATA_ID_WORDS * 2;
381 ata_cmnd.buffer = dev->bounce_lpar;
382 ata_cmnd.proto = PIO_DATA_IN_PROTO;
383 ata_cmnd.in_out = DIR_READ;
384
385 res = ps3stor_send_command(dev, LV1_STORAGE_SEND_ATA_COMMAND,
386 ps3_mm_phys_to_lpar(__pa(&ata_cmnd)),
387 sizeof(ata_cmnd), ata_cmnd.buffer,
388 ata_cmnd.arglen);
389 if (res) {
390 dev_err(&dev->sbd.core, "%s:%u: identify disk failed 0x%llx\n",
391 __func__, __LINE__, res);
392 return -EIO;
393 }
394
395 swap_buf_le16(id, ATA_ID_WORDS);
396
397
398 priv->raw_capacity = ata_id_n_sectors(id);
399 ata_id_c_string(id, priv->model, ATA_ID_PROD, sizeof(priv->model));
400 return 0;
401}
402
403static unsigned long ps3disk_mask;
404
405static DEFINE_MUTEX(ps3disk_mask_mutex);
406
407static int ps3disk_probe(struct ps3_system_bus_device *_dev)
408{
409 struct ps3_storage_device *dev = to_ps3_storage_device(&_dev->core);
410 struct ps3disk_private *priv;
411 int error;
412 unsigned int devidx;
413 struct request_queue *queue;
414 struct gendisk *gendisk;
415
416 if (dev->blk_size < 512) {
417 dev_err(&dev->sbd.core,
418 "%s:%u: cannot handle block size %llu\n", __func__,
419 __LINE__, dev->blk_size);
420 return -EINVAL;
421 }
422
423 BUILD_BUG_ON(PS3DISK_MAX_DISKS > BITS_PER_LONG);
424 mutex_lock(&ps3disk_mask_mutex);
425 devidx = find_first_zero_bit(&ps3disk_mask, PS3DISK_MAX_DISKS);
426 if (devidx >= PS3DISK_MAX_DISKS) {
427 dev_err(&dev->sbd.core, "%s:%u: Too many disks\n", __func__,
428 __LINE__);
429 mutex_unlock(&ps3disk_mask_mutex);
430 return -ENOSPC;
431 }
432 __set_bit(devidx, &ps3disk_mask);
433 mutex_unlock(&ps3disk_mask_mutex);
434
435 priv = kzalloc(sizeof(*priv), GFP_KERNEL);
436 if (!priv) {
437 error = -ENOMEM;
438 goto fail;
439 }
440
441 ps3_system_bus_set_drvdata(_dev, priv);
442 spin_lock_init(&priv->lock);
443
444 dev->bounce_size = BOUNCE_SIZE;
445 dev->bounce_buf = kmalloc(BOUNCE_SIZE, GFP_DMA);
446 if (!dev->bounce_buf) {
447 error = -ENOMEM;
448 goto fail_free_priv;
449 }
450
451 error = ps3stor_setup(dev, ps3disk_interrupt);
452 if (error)
453 goto fail_free_bounce;
454
455 ps3disk_identify(dev);
456
457 queue = blk_init_queue(ps3disk_request, &priv->lock);
458 if (!queue) {
459 dev_err(&dev->sbd.core, "%s:%u: blk_init_queue failed\n",
460 __func__, __LINE__);
461 error = -ENOMEM;
462 goto fail_teardown;
463 }
464
465 priv->queue = queue;
466 queue->queuedata = dev;
467
468 blk_queue_bounce_limit(queue, BLK_BOUNCE_HIGH);
469
470 blk_queue_max_hw_sectors(queue, dev->bounce_size >> 9);
471 blk_queue_segment_boundary(queue, -1UL);
472 blk_queue_dma_alignment(queue, dev->blk_size-1);
473 blk_queue_logical_block_size(queue, dev->blk_size);
474
475 blk_queue_write_cache(queue, true, false);
476
477 blk_queue_max_segments(queue, -1);
478 blk_queue_max_segment_size(queue, dev->bounce_size);
479
480 gendisk = alloc_disk(PS3DISK_MINORS);
481 if (!gendisk) {
482 dev_err(&dev->sbd.core, "%s:%u: alloc_disk failed\n", __func__,
483 __LINE__);
484 error = -ENOMEM;
485 goto fail_cleanup_queue;
486 }
487
488 priv->gendisk = gendisk;
489 gendisk->major = ps3disk_major;
490 gendisk->first_minor = devidx * PS3DISK_MINORS;
491 gendisk->fops = &ps3disk_fops;
492 gendisk->queue = queue;
493 gendisk->private_data = dev;
494 snprintf(gendisk->disk_name, sizeof(gendisk->disk_name), PS3DISK_NAME,
495 devidx+'a');
496 priv->blocking_factor = dev->blk_size >> 9;
497 set_capacity(gendisk,
498 dev->regions[dev->region_idx].size*priv->blocking_factor);
499
500 dev_info(&dev->sbd.core,
501 "%s is a %s (%llu MiB total, %lu MiB for OtherOS)\n",
502 gendisk->disk_name, priv->model, priv->raw_capacity >> 11,
503 get_capacity(gendisk) >> 11);
504
505 device_add_disk(&dev->sbd.core, gendisk);
506 return 0;
507
508fail_cleanup_queue:
509 blk_cleanup_queue(queue);
510fail_teardown:
511 ps3stor_teardown(dev);
512fail_free_bounce:
513 kfree(dev->bounce_buf);
514fail_free_priv:
515 kfree(priv);
516 ps3_system_bus_set_drvdata(_dev, NULL);
517fail:
518 mutex_lock(&ps3disk_mask_mutex);
519 __clear_bit(devidx, &ps3disk_mask);
520 mutex_unlock(&ps3disk_mask_mutex);
521 return error;
522}
523
524static int ps3disk_remove(struct ps3_system_bus_device *_dev)
525{
526 struct ps3_storage_device *dev = to_ps3_storage_device(&_dev->core);
527 struct ps3disk_private *priv = ps3_system_bus_get_drvdata(&dev->sbd);
528
529 mutex_lock(&ps3disk_mask_mutex);
530 __clear_bit(MINOR(disk_devt(priv->gendisk)) / PS3DISK_MINORS,
531 &ps3disk_mask);
532 mutex_unlock(&ps3disk_mask_mutex);
533 del_gendisk(priv->gendisk);
534 blk_cleanup_queue(priv->queue);
535 put_disk(priv->gendisk);
536 dev_notice(&dev->sbd.core, "Synchronizing disk cache\n");
537 ps3disk_sync_cache(dev);
538 ps3stor_teardown(dev);
539 kfree(dev->bounce_buf);
540 kfree(priv);
541 ps3_system_bus_set_drvdata(_dev, NULL);
542 return 0;
543}
544
545static struct ps3_system_bus_driver ps3disk = {
546 .match_id = PS3_MATCH_ID_STOR_DISK,
547 .core.name = DEVICE_NAME,
548 .core.owner = THIS_MODULE,
549 .probe = ps3disk_probe,
550 .remove = ps3disk_remove,
551 .shutdown = ps3disk_remove,
552};
553
554
555static int __init ps3disk_init(void)
556{
557 int error;
558
559 if (!firmware_has_feature(FW_FEATURE_PS3_LV1))
560 return -ENODEV;
561
562 error = register_blkdev(0, DEVICE_NAME);
563 if (error <= 0) {
564 printk(KERN_ERR "%s:%u: register_blkdev failed %d\n", __func__,
565 __LINE__, error);
566 return error;
567 }
568 ps3disk_major = error;
569
570 pr_info("%s:%u: registered block device major %d\n", __func__,
571 __LINE__, ps3disk_major);
572
573 error = ps3_system_bus_driver_register(&ps3disk);
574 if (error)
575 unregister_blkdev(ps3disk_major, DEVICE_NAME);
576
577 return error;
578}
579
580static void __exit ps3disk_exit(void)
581{
582 ps3_system_bus_driver_unregister(&ps3disk);
583 unregister_blkdev(ps3disk_major, DEVICE_NAME);
584}
585
586module_init(ps3disk_init);
587module_exit(ps3disk_exit);
588
589MODULE_LICENSE("GPL");
590MODULE_DESCRIPTION("PS3 Disk Storage Driver");
591MODULE_AUTHOR("Sony Corporation");
592MODULE_ALIAS(PS3_MODULE_ALIAS_STOR_DISK);
593
