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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, -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 (req->cmd_flags & REQ_FLUSH) {
200 if (ps3disk_submit_flush_request(dev, req))
201 break;
202 } else if (req->cmd_type == REQ_TYPE_FS) {
203 if (ps3disk_submit_request_sg(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_flags & REQ_FLUSH) {
260 read = 0;
261 op = "flush";
262 } else {
263 read = !rq_data_dir(req);
264 op = read ? "read" : "write";
265 }
266 if (status) {
267 dev_dbg(&dev->sbd.core, "%s:%u: %s failed 0x%llx\n", __func__,
268 __LINE__, op, status);
269 error = -EIO;
270 } else {
271 dev_dbg(&dev->sbd.core, "%s:%u: %s completed\n", __func__,
272 __LINE__, op);
273 error = 0;
274 if (read)
275 ps3disk_scatter_gather(dev, req, 0);
276 }
277
278 spin_lock(&priv->lock);
279 __blk_end_request_all(req, error);
280 priv->req = NULL;
281 ps3disk_do_request(dev, priv->queue);
282 spin_unlock(&priv->lock);
283
284 return IRQ_HANDLED;
285}
286
287static int ps3disk_sync_cache(struct ps3_storage_device *dev)
288{
289 u64 res;
290
291 dev_dbg(&dev->sbd.core, "%s:%u: sync cache\n", __func__, __LINE__);
292
293 res = ps3stor_send_command(dev, LV1_STORAGE_ATA_HDDOUT, 0, 0, 0, 0);
294 if (res) {
295 dev_err(&dev->sbd.core, "%s:%u: sync cache failed 0x%llx\n",
296 __func__, __LINE__, res);
297 return -EIO;
298 }
299 return 0;
300}
301
302
303
304
305static void swap_buf_le16(u16 *buf, unsigned int buf_words)
306{
307#ifdef __BIG_ENDIAN
308 unsigned int i;
309
310 for (i = 0; i < buf_words; i++)
311 buf[i] = le16_to_cpu(buf[i]);
312#endif
313}
314
315static u64 ata_id_n_sectors(const u16 *id)
316{
317 if (ata_id_has_lba(id)) {
318 if (ata_id_has_lba48(id))
319 return ata_id_u64(id, 100);
320 else
321 return ata_id_u32(id, 60);
322 } else {
323 if (ata_id_current_chs_valid(id))
324 return ata_id_u32(id, 57);
325 else
326 return id[1] * id[3] * id[6];
327 }
328}
329
330static void ata_id_string(const u16 *id, unsigned char *s, unsigned int ofs,
331 unsigned int len)
332{
333 unsigned int c;
334
335 while (len > 0) {
336 c = id[ofs] >> 8;
337 *s = c;
338 s++;
339
340 c = id[ofs] & 0xff;
341 *s = c;
342 s++;
343
344 ofs++;
345 len -= 2;
346 }
347}
348
349static void ata_id_c_string(const u16 *id, unsigned char *s, unsigned int ofs,
350 unsigned int len)
351{
352 unsigned char *p;
353
354 WARN_ON(!(len & 1));
355
356 ata_id_string(id, s, ofs, len - 1);
357
358 p = s + strnlen(s, len - 1);
359 while (p > s && p[-1] == ' ')
360 p--;
361 *p = '\0';
362}
363
364static int ps3disk_identify(struct ps3_storage_device *dev)
365{
366 struct ps3disk_private *priv = ps3_system_bus_get_drvdata(&dev->sbd);
367 struct lv1_ata_cmnd_block ata_cmnd;
368 u16 *id = dev->bounce_buf;
369 u64 res;
370
371 dev_dbg(&dev->sbd.core, "%s:%u: identify disk\n", __func__, __LINE__);
372
373 memset(&ata_cmnd, 0, sizeof(struct lv1_ata_cmnd_block));
374 ata_cmnd.command = ATA_CMD_ID_ATA;
375 ata_cmnd.sector_count = 1;
376 ata_cmnd.size = ata_cmnd.arglen = ATA_ID_WORDS * 2;
377 ata_cmnd.buffer = dev->bounce_lpar;
378 ata_cmnd.proto = PIO_DATA_IN_PROTO;
379 ata_cmnd.in_out = DIR_READ;
380
381 res = ps3stor_send_command(dev, LV1_STORAGE_SEND_ATA_COMMAND,
382 ps3_mm_phys_to_lpar(__pa(&ata_cmnd)),
383 sizeof(ata_cmnd), ata_cmnd.buffer,
384 ata_cmnd.arglen);
385 if (res) {
386 dev_err(&dev->sbd.core, "%s:%u: identify disk failed 0x%llx\n",
387 __func__, __LINE__, res);
388 return -EIO;
389 }
390
391 swap_buf_le16(id, ATA_ID_WORDS);
392
393
394 priv->raw_capacity = ata_id_n_sectors(id);
395 ata_id_c_string(id, priv->model, ATA_ID_PROD, sizeof(priv->model));
396 return 0;
397}
398
399static unsigned long ps3disk_mask;
400
401static DEFINE_MUTEX(ps3disk_mask_mutex);
402
403static int ps3disk_probe(struct ps3_system_bus_device *_dev)
404{
405 struct ps3_storage_device *dev = to_ps3_storage_device(&_dev->core);
406 struct ps3disk_private *priv;
407 int error;
408 unsigned int devidx;
409 struct request_queue *queue;
410 struct gendisk *gendisk;
411
412 if (dev->blk_size < 512) {
413 dev_err(&dev->sbd.core,
414 "%s:%u: cannot handle block size %llu\n", __func__,
415 __LINE__, dev->blk_size);
416 return -EINVAL;
417 }
418
419 BUILD_BUG_ON(PS3DISK_MAX_DISKS > BITS_PER_LONG);
420 mutex_lock(&ps3disk_mask_mutex);
421 devidx = find_first_zero_bit(&ps3disk_mask, PS3DISK_MAX_DISKS);
422 if (devidx >= PS3DISK_MAX_DISKS) {
423 dev_err(&dev->sbd.core, "%s:%u: Too many disks\n", __func__,
424 __LINE__);
425 mutex_unlock(&ps3disk_mask_mutex);
426 return -ENOSPC;
427 }
428 __set_bit(devidx, &ps3disk_mask);
429 mutex_unlock(&ps3disk_mask_mutex);
430
431 priv = kzalloc(sizeof(*priv), GFP_KERNEL);
432 if (!priv) {
433 error = -ENOMEM;
434 goto fail;
435 }
436
437 ps3_system_bus_set_drvdata(_dev, priv);
438 spin_lock_init(&priv->lock);
439
440 dev->bounce_size = BOUNCE_SIZE;
441 dev->bounce_buf = kmalloc(BOUNCE_SIZE, GFP_DMA);
442 if (!dev->bounce_buf) {
443 error = -ENOMEM;
444 goto fail_free_priv;
445 }
446
447 error = ps3stor_setup(dev, ps3disk_interrupt);
448 if (error)
449 goto fail_free_bounce;
450
451 ps3disk_identify(dev);
452
453 queue = blk_init_queue(ps3disk_request, &priv->lock);
454 if (!queue) {
455 dev_err(&dev->sbd.core, "%s:%u: blk_init_queue failed\n",
456 __func__, __LINE__);
457 error = -ENOMEM;
458 goto fail_teardown;
459 }
460
461 priv->queue = queue;
462 queue->queuedata = dev;
463
464 blk_queue_bounce_limit(queue, BLK_BOUNCE_HIGH);
465
466 blk_queue_max_hw_sectors(queue, dev->bounce_size >> 9);
467 blk_queue_segment_boundary(queue, -1UL);
468 blk_queue_dma_alignment(queue, dev->blk_size-1);
469 blk_queue_logical_block_size(queue, dev->blk_size);
470
471 blk_queue_flush(queue, REQ_FLUSH);
472
473 blk_queue_max_segments(queue, -1);
474 blk_queue_max_segment_size(queue, dev->bounce_size);
475
476 gendisk = alloc_disk(PS3DISK_MINORS);
477 if (!gendisk) {
478 dev_err(&dev->sbd.core, "%s:%u: alloc_disk failed\n", __func__,
479 __LINE__);
480 error = -ENOMEM;
481 goto fail_cleanup_queue;
482 }
483
484 priv->gendisk = gendisk;
485 gendisk->major = ps3disk_major;
486 gendisk->first_minor = devidx * PS3DISK_MINORS;
487 gendisk->fops = &ps3disk_fops;
488 gendisk->queue = queue;
489 gendisk->private_data = dev;
490 gendisk->driverfs_dev = &dev->sbd.core;
491 snprintf(gendisk->disk_name, sizeof(gendisk->disk_name), PS3DISK_NAME,
492 devidx+'a');
493 priv->blocking_factor = dev->blk_size >> 9;
494 set_capacity(gendisk,
495 dev->regions[dev->region_idx].size*priv->blocking_factor);
496
497 dev_info(&dev->sbd.core,
498 "%s is a %s (%llu MiB total, %lu MiB for OtherOS)\n",
499 gendisk->disk_name, priv->model, priv->raw_capacity >> 11,
500 get_capacity(gendisk) >> 11);
501
502 add_disk(gendisk);
503 return 0;
504
505fail_cleanup_queue:
506 blk_cleanup_queue(queue);
507fail_teardown:
508 ps3stor_teardown(dev);
509fail_free_bounce:
510 kfree(dev->bounce_buf);
511fail_free_priv:
512 kfree(priv);
513 ps3_system_bus_set_drvdata(_dev, NULL);
514fail:
515 mutex_lock(&ps3disk_mask_mutex);
516 __clear_bit(devidx, &ps3disk_mask);
517 mutex_unlock(&ps3disk_mask_mutex);
518 return error;
519}
520
521static int ps3disk_remove(struct ps3_system_bus_device *_dev)
522{
523 struct ps3_storage_device *dev = to_ps3_storage_device(&_dev->core);
524 struct ps3disk_private *priv = ps3_system_bus_get_drvdata(&dev->sbd);
525
526 mutex_lock(&ps3disk_mask_mutex);
527 __clear_bit(MINOR(disk_devt(priv->gendisk)) / PS3DISK_MINORS,
528 &ps3disk_mask);
529 mutex_unlock(&ps3disk_mask_mutex);
530 del_gendisk(priv->gendisk);
531 blk_cleanup_queue(priv->queue);
532 put_disk(priv->gendisk);
533 dev_notice(&dev->sbd.core, "Synchronizing disk cache\n");
534 ps3disk_sync_cache(dev);
535 ps3stor_teardown(dev);
536 kfree(dev->bounce_buf);
537 kfree(priv);
538 ps3_system_bus_set_drvdata(_dev, NULL);
539 return 0;
540}
541
542static struct ps3_system_bus_driver ps3disk = {
543 .match_id = PS3_MATCH_ID_STOR_DISK,
544 .core.name = DEVICE_NAME,
545 .core.owner = THIS_MODULE,
546 .probe = ps3disk_probe,
547 .remove = ps3disk_remove,
548 .shutdown = ps3disk_remove,
549};
550
551
552static int __init ps3disk_init(void)
553{
554 int error;
555
556 if (!firmware_has_feature(FW_FEATURE_PS3_LV1))
557 return -ENODEV;
558
559 error = register_blkdev(0, DEVICE_NAME);
560 if (error <= 0) {
561 printk(KERN_ERR "%s:%u: register_blkdev failed %d\n", __func__,
562 __LINE__, error);
563 return error;
564 }
565 ps3disk_major = error;
566
567 pr_info("%s:%u: registered block device major %d\n", __func__,
568 __LINE__, ps3disk_major);
569
570 error = ps3_system_bus_driver_register(&ps3disk);
571 if (error)
572 unregister_blkdev(ps3disk_major, DEVICE_NAME);
573
574 return error;
575}
576
577static void __exit ps3disk_exit(void)
578{
579 ps3_system_bus_driver_unregister(&ps3disk);
580 unregister_blkdev(ps3disk_major, DEVICE_NAME);
581}
582
583module_init(ps3disk_init);
584module_exit(ps3disk_exit);
585
586MODULE_LICENSE("GPL");
587MODULE_DESCRIPTION("PS3 Disk Storage Driver");
588MODULE_AUTHOR("Sony Corporation");
589MODULE_ALIAS(PS3_MODULE_ALIAS_STOR_DISK);
590
