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Linux 3.11-rc3
[cris-mirror.git] / drivers / block / ps3vram.c
blob06a2e53e5f37299191b1d9c7fe5e2caf036461a6
1 /*
2 * ps3vram - Use extra PS3 video ram as MTD block device.
3 *
4 * Copyright 2009 Sony Corporation
5 *
6 * Based on the MTD ps3vram driver, which is
7 * Copyright (c) 2007-2008 Jim Paris <jim@jtan.com>
8 * Added support RSX DMA Vivien Chappelier <vivien.chappelier@free.fr>
9 */
10
11 #include <linux/blkdev.h>
12 #include <linux/delay.h>
13 #include <linux/module.h>
14 #include <linux/proc_fs.h>
15 #include <linux/seq_file.h>
16 #include <linux/slab.h>
17
18 #include <asm/cell-regs.h>
19 #include <asm/firmware.h>
20 #include <asm/lv1call.h>
21 #include <asm/ps3.h>
22 #include <asm/ps3gpu.h>
23
24
25 #define DEVICE_NAME "ps3vram"
26
27
28 #define XDR_BUF_SIZE (2 * 1024 * 1024) /* XDR buffer (must be 1MiB aligned) */
29 #define XDR_IOIF 0x0c000000
30
31 #define FIFO_BASE XDR_IOIF
32 #define FIFO_SIZE (64 * 1024)
33
34 #define DMA_PAGE_SIZE (4 * 1024)
35
36 #define CACHE_PAGE_SIZE (256 * 1024)
37 #define CACHE_PAGE_COUNT ((XDR_BUF_SIZE - FIFO_SIZE) / CACHE_PAGE_SIZE)
38
39 #define CACHE_OFFSET CACHE_PAGE_SIZE
40 #define FIFO_OFFSET 0
41
42 #define CTRL_PUT 0x10
43 #define CTRL_GET 0x11
44 #define CTRL_TOP 0x15
45
46 #define UPLOAD_SUBCH 1
47 #define DOWNLOAD_SUBCH 2
48
49 #define NV_MEMORY_TO_MEMORY_FORMAT_OFFSET_IN 0x0000030c
50 #define NV_MEMORY_TO_MEMORY_FORMAT_NOTIFY 0x00000104
51
52 #define CACHE_PAGE_PRESENT 1
53 #define CACHE_PAGE_DIRTY 2
54
55 struct ps3vram_tag {
56 unsigned int address;
57 unsigned int flags;
58 };
59
60 struct ps3vram_cache {
61 unsigned int page_count;
62 unsigned int page_size;
63 struct ps3vram_tag *tags;
64 unsigned int hit;
65 unsigned int miss;
66 };
67
68 struct ps3vram_priv {
69 struct request_queue *queue;
70 struct gendisk *gendisk;
71
72 u64 size;
73
74 u64 memory_handle;
75 u64 context_handle;
76 u32 *ctrl;
77 void *reports;
78 u8 *xdr_buf;
79
80 u32 *fifo_base;
81 u32 *fifo_ptr;
82
83 struct ps3vram_cache cache;
84
85 spinlock_t lock; /* protecting list of bios */
86 struct bio_list list;
87 };
88
89
90 static int ps3vram_major;
91
92
93 static const struct block_device_operations ps3vram_fops = {
94 .owner = THIS_MODULE,
95 };
96
97
98 #define DMA_NOTIFIER_HANDLE_BASE 0x66604200 /* first DMA notifier handle */
99 #define DMA_NOTIFIER_OFFSET_BASE 0x1000 /* first DMA notifier offset */
100 #define DMA_NOTIFIER_SIZE 0x40
101 #define NOTIFIER 7 /* notifier used for completion report */
102
103 static char *size = "256M";
104 module_param(size, charp, 0);
105 MODULE_PARM_DESC(size, "memory size");
106
107 static u32 *ps3vram_get_notifier(void *reports, int notifier)
108 {
109 return reports + DMA_NOTIFIER_OFFSET_BASE +
110 DMA_NOTIFIER_SIZE * notifier;
111 }
112
113 static void ps3vram_notifier_reset(struct ps3_system_bus_device *dev)
114 {
115 struct ps3vram_priv *priv = ps3_system_bus_get_drvdata(dev);
116 u32 *notify = ps3vram_get_notifier(priv->reports, NOTIFIER);
117 int i;
118
119 for (i = 0; i < 4; i++)
120 notify[i] = 0xffffffff;
121 }
122
123 static int ps3vram_notifier_wait(struct ps3_system_bus_device *dev,
124 unsigned int timeout_ms)
125 {
126 struct ps3vram_priv *priv = ps3_system_bus_get_drvdata(dev);
127 u32 *notify = ps3vram_get_notifier(priv->reports, NOTIFIER);
128 unsigned long timeout;
129
130 for (timeout = 20; timeout; timeout--) {
131 if (!notify[3])
132 return 0;
133 udelay(10);
134 }
135
136 timeout = jiffies + msecs_to_jiffies(timeout_ms);
137
138 do {
139 if (!notify[3])
140 return 0;
141 msleep(1);
142 } while (time_before(jiffies, timeout));
143
144 return -ETIMEDOUT;
145 }
146
147 static void ps3vram_init_ring(struct ps3_system_bus_device *dev)
148 {
149 struct ps3vram_priv *priv = ps3_system_bus_get_drvdata(dev);
150
151 priv->ctrl[CTRL_PUT] = FIFO_BASE + FIFO_OFFSET;
152 priv->ctrl[CTRL_GET] = FIFO_BASE + FIFO_OFFSET;
153 }
154
155 static int ps3vram_wait_ring(struct ps3_system_bus_device *dev,
156 unsigned int timeout_ms)
157 {
158 struct ps3vram_priv *priv = ps3_system_bus_get_drvdata(dev);
159 unsigned long timeout = jiffies + msecs_to_jiffies(timeout_ms);
160
161 do {
162 if (priv->ctrl[CTRL_PUT] == priv->ctrl[CTRL_GET])
163 return 0;
164 msleep(1);
165 } while (time_before(jiffies, timeout));
166
167 dev_warn(&dev->core, "FIFO timeout (%08x/%08x/%08x)\n",
168 priv->ctrl[CTRL_PUT], priv->ctrl[CTRL_GET],
169 priv->ctrl[CTRL_TOP]);
170
171 return -ETIMEDOUT;
172 }
173
174 static void ps3vram_out_ring(struct ps3vram_priv *priv, u32 data)
175 {
176 *(priv->fifo_ptr)++ = data;
177 }
178
179 static void ps3vram_begin_ring(struct ps3vram_priv *priv, u32 chan, u32 tag,
180 u32 size)
181 {
182 ps3vram_out_ring(priv, (size << 18) | (chan << 13) | tag);
183 }
184
185 static void ps3vram_rewind_ring(struct ps3_system_bus_device *dev)
186 {
187 struct ps3vram_priv *priv = ps3_system_bus_get_drvdata(dev);
188 int status;
189
190 ps3vram_out_ring(priv, 0x20000000 | (FIFO_BASE + FIFO_OFFSET));
191
192 priv->ctrl[CTRL_PUT] = FIFO_BASE + FIFO_OFFSET;
193
194 /* asking the HV for a blit will kick the FIFO */
195 status = lv1_gpu_fb_blit(priv->context_handle, 0, 0, 0, 0);
196 if (status)
197 dev_err(&dev->core, "%s: lv1_gpu_fb_blit failed %d\n",
198 __func__, status);
199
200 priv->fifo_ptr = priv->fifo_base;
201 }
202
203 static void ps3vram_fire_ring(struct ps3_system_bus_device *dev)
204 {
205 struct ps3vram_priv *priv = ps3_system_bus_get_drvdata(dev);
206 int status;
207
208 mutex_lock(&ps3_gpu_mutex);
209
210 priv->ctrl[CTRL_PUT] = FIFO_BASE + FIFO_OFFSET +
211 (priv->fifo_ptr - priv->fifo_base) * sizeof(u32);
212
213 /* asking the HV for a blit will kick the FIFO */
214 status = lv1_gpu_fb_blit(priv->context_handle, 0, 0, 0, 0);
215 if (status)
216 dev_err(&dev->core, "%s: lv1_gpu_fb_blit failed %d\n",
217 __func__, status);
218
219 if ((priv->fifo_ptr - priv->fifo_base) * sizeof(u32) >
220 FIFO_SIZE - 1024) {
221 dev_dbg(&dev->core, "FIFO full, rewinding\n");
222 ps3vram_wait_ring(dev, 200);
223 ps3vram_rewind_ring(dev);
224 }
225
226 mutex_unlock(&ps3_gpu_mutex);
227 }
228
229 static void ps3vram_bind(struct ps3_system_bus_device *dev)
230 {
231 struct ps3vram_priv *priv = ps3_system_bus_get_drvdata(dev);
232
233 ps3vram_begin_ring(priv, UPLOAD_SUBCH, 0, 1);
234 ps3vram_out_ring(priv, 0x31337303);
235 ps3vram_begin_ring(priv, UPLOAD_SUBCH, 0x180, 3);
236 ps3vram_out_ring(priv, DMA_NOTIFIER_HANDLE_BASE + NOTIFIER);
237 ps3vram_out_ring(priv, 0xfeed0001); /* DMA system RAM instance */
238 ps3vram_out_ring(priv, 0xfeed0000); /* DMA video RAM instance */
239
240 ps3vram_begin_ring(priv, DOWNLOAD_SUBCH, 0, 1);
241 ps3vram_out_ring(priv, 0x3137c0de);
242 ps3vram_begin_ring(priv, DOWNLOAD_SUBCH, 0x180, 3);
243 ps3vram_out_ring(priv, DMA_NOTIFIER_HANDLE_BASE + NOTIFIER);
244 ps3vram_out_ring(priv, 0xfeed0000); /* DMA video RAM instance */
245 ps3vram_out_ring(priv, 0xfeed0001); /* DMA system RAM instance */
246
247 ps3vram_fire_ring(dev);
248 }
249
250 static int ps3vram_upload(struct ps3_system_bus_device *dev,
251 unsigned int src_offset, unsigned int dst_offset,
252 int len, int count)
253 {
254 struct ps3vram_priv *priv = ps3_system_bus_get_drvdata(dev);
255
256 ps3vram_begin_ring(priv, UPLOAD_SUBCH,
257 NV_MEMORY_TO_MEMORY_FORMAT_OFFSET_IN, 8);
258 ps3vram_out_ring(priv, XDR_IOIF + src_offset);
259 ps3vram_out_ring(priv, dst_offset);
260 ps3vram_out_ring(priv, len);
261 ps3vram_out_ring(priv, len);
262 ps3vram_out_ring(priv, len);
263 ps3vram_out_ring(priv, count);
264 ps3vram_out_ring(priv, (1 << 8) | 1);
265 ps3vram_out_ring(priv, 0);
266
267 ps3vram_notifier_reset(dev);
268 ps3vram_begin_ring(priv, UPLOAD_SUBCH,
269 NV_MEMORY_TO_MEMORY_FORMAT_NOTIFY, 1);
270 ps3vram_out_ring(priv, 0);
271 ps3vram_begin_ring(priv, UPLOAD_SUBCH, 0x100, 1);
272 ps3vram_out_ring(priv, 0);
273 ps3vram_fire_ring(dev);
274 if (ps3vram_notifier_wait(dev, 200) < 0) {
275 dev_warn(&dev->core, "%s: Notifier timeout\n", __func__);
276 return -1;
277 }
278
279 return 0;
280 }
281
282 static int ps3vram_download(struct ps3_system_bus_device *dev,
283 unsigned int src_offset, unsigned int dst_offset,
284 int len, int count)
285 {
286 struct ps3vram_priv *priv = ps3_system_bus_get_drvdata(dev);
287
288 ps3vram_begin_ring(priv, DOWNLOAD_SUBCH,
289 NV_MEMORY_TO_MEMORY_FORMAT_OFFSET_IN, 8);
290 ps3vram_out_ring(priv, src_offset);
291 ps3vram_out_ring(priv, XDR_IOIF + dst_offset);
292 ps3vram_out_ring(priv, len);
293 ps3vram_out_ring(priv, len);
294 ps3vram_out_ring(priv, len);
295 ps3vram_out_ring(priv, count);
296 ps3vram_out_ring(priv, (1 << 8) | 1);
297 ps3vram_out_ring(priv, 0);
298
299 ps3vram_notifier_reset(dev);
300 ps3vram_begin_ring(priv, DOWNLOAD_SUBCH,
301 NV_MEMORY_TO_MEMORY_FORMAT_NOTIFY, 1);
302 ps3vram_out_ring(priv, 0);
303 ps3vram_begin_ring(priv, DOWNLOAD_SUBCH, 0x100, 1);
304 ps3vram_out_ring(priv, 0);
305 ps3vram_fire_ring(dev);
306 if (ps3vram_notifier_wait(dev, 200) < 0) {
307 dev_warn(&dev->core, "%s: Notifier timeout\n", __func__);
308 return -1;
309 }
310
311 return 0;
312 }
313
314 static void ps3vram_cache_evict(struct ps3_system_bus_device *dev, int entry)
315 {
316 struct ps3vram_priv *priv = ps3_system_bus_get_drvdata(dev);
317 struct ps3vram_cache *cache = &priv->cache;
318
319 if (!(cache->tags[entry].flags & CACHE_PAGE_DIRTY))
320 return;
321
322 dev_dbg(&dev->core, "Flushing %d: 0x%08x\n", entry,
323 cache->tags[entry].address);
324 if (ps3vram_upload(dev, CACHE_OFFSET + entry * cache->page_size,
325 cache->tags[entry].address, DMA_PAGE_SIZE,
326 cache->page_size / DMA_PAGE_SIZE) < 0) {
327 dev_err(&dev->core,
328 "Failed to upload from 0x%x to " "0x%x size 0x%x\n",
329 entry * cache->page_size, cache->tags[entry].address,
330 cache->page_size);
331 }
332 cache->tags[entry].flags &= ~CACHE_PAGE_DIRTY;
333 }
334
335 static void ps3vram_cache_load(struct ps3_system_bus_device *dev, int entry,
336 unsigned int address)
337 {
338 struct ps3vram_priv *priv = ps3_system_bus_get_drvdata(dev);
339 struct ps3vram_cache *cache = &priv->cache;
340
341 dev_dbg(&dev->core, "Fetching %d: 0x%08x\n", entry, address);
342 if (ps3vram_download(dev, address,
343 CACHE_OFFSET + entry * cache->page_size,
344 DMA_PAGE_SIZE,
345 cache->page_size / DMA_PAGE_SIZE) < 0) {
346 dev_err(&dev->core,
347 "Failed to download from 0x%x to 0x%x size 0x%x\n",
348 address, entry * cache->page_size, cache->page_size);
349 }
350
351 cache->tags[entry].address = address;
352 cache->tags[entry].flags |= CACHE_PAGE_PRESENT;
353 }
354
355
356 static void ps3vram_cache_flush(struct ps3_system_bus_device *dev)
357 {
358 struct ps3vram_priv *priv = ps3_system_bus_get_drvdata(dev);
359 struct ps3vram_cache *cache = &priv->cache;
360 int i;
361
362 dev_dbg(&dev->core, "FLUSH\n");
363 for (i = 0; i < cache->page_count; i++) {
364 ps3vram_cache_evict(dev, i);
365 cache->tags[i].flags = 0;
366 }
367 }
368
369 static unsigned int ps3vram_cache_match(struct ps3_system_bus_device *dev,
370 loff_t address)
371 {
372 struct ps3vram_priv *priv = ps3_system_bus_get_drvdata(dev);
373 struct ps3vram_cache *cache = &priv->cache;
374 unsigned int base;
375 unsigned int offset;
376 int i;
377 static int counter;
378
379 offset = (unsigned int) (address & (cache->page_size - 1));
380 base = (unsigned int) (address - offset);
381
382 /* fully associative check */
383 for (i = 0; i < cache->page_count; i++) {
384 if ((cache->tags[i].flags & CACHE_PAGE_PRESENT) &&
385 cache->tags[i].address == base) {
386 cache->hit++;
387 dev_dbg(&dev->core, "Found entry %d: 0x%08x\n", i,
388 cache->tags[i].address);
389 return i;
390 }
391 }
392
393 /* choose a random entry */
394 i = (jiffies + (counter++)) % cache->page_count;
395 dev_dbg(&dev->core, "Using entry %d\n", i);
396
397 ps3vram_cache_evict(dev, i);
398 ps3vram_cache_load(dev, i, base);
399
400 cache->miss++;
401 return i;
402 }
403
404 static int ps3vram_cache_init(struct ps3_system_bus_device *dev)
405 {
406 struct ps3vram_priv *priv = ps3_system_bus_get_drvdata(dev);
407
408 priv->cache.page_count = CACHE_PAGE_COUNT;
409 priv->cache.page_size = CACHE_PAGE_SIZE;
410 priv->cache.tags = kzalloc(sizeof(struct ps3vram_tag) *
411 CACHE_PAGE_COUNT, GFP_KERNEL);
412 if (priv->cache.tags == NULL) {
413 dev_err(&dev->core, "Could not allocate cache tags\n");
414 return -ENOMEM;
415 }
416
417 dev_info(&dev->core, "Created ram cache: %d entries, %d KiB each\n",
418 CACHE_PAGE_COUNT, CACHE_PAGE_SIZE / 1024);
419
420 return 0;
421 }
422
423 static void ps3vram_cache_cleanup(struct ps3_system_bus_device *dev)
424 {
425 struct ps3vram_priv *priv = ps3_system_bus_get_drvdata(dev);
426
427 ps3vram_cache_flush(dev);
428 kfree(priv->cache.tags);
429 }
430
431 static int ps3vram_read(struct ps3_system_bus_device *dev, loff_t from,
432 size_t len, size_t *retlen, u_char *buf)
433 {
434 struct ps3vram_priv *priv = ps3_system_bus_get_drvdata(dev);
435 unsigned int cached, count;
436
437 dev_dbg(&dev->core, "%s: from=0x%08x len=0x%zx\n", __func__,
438 (unsigned int)from, len);
439
440 if (from >= priv->size)
441 return -EIO;
442
443 if (len > priv->size - from)
444 len = priv->size - from;
445
446 /* Copy from vram to buf */
447 count = len;
448 while (count) {
449 unsigned int offset, avail;
450 unsigned int entry;
451
452 offset = (unsigned int) (from & (priv->cache.page_size - 1));
453 avail = priv->cache.page_size - offset;
454
455 entry = ps3vram_cache_match(dev, from);
456 cached = CACHE_OFFSET + entry * priv->cache.page_size + offset;
457
458 dev_dbg(&dev->core, "%s: from=%08x cached=%08x offset=%08x "
459 "avail=%08x count=%08x\n", __func__,
460 (unsigned int)from, cached, offset, avail, count);
461
462 if (avail > count)
463 avail = count;
464 memcpy(buf, priv->xdr_buf + cached, avail);
465
466 buf += avail;
467 count -= avail;
468 from += avail;
469 }
470
471 *retlen = len;
472 return 0;
473 }
474
475 static int ps3vram_write(struct ps3_system_bus_device *dev, loff_t to,
476 size_t len, size_t *retlen, const u_char *buf)
477 {
478 struct ps3vram_priv *priv = ps3_system_bus_get_drvdata(dev);
479 unsigned int cached, count;
480
481 if (to >= priv->size)
482 return -EIO;
483
484 if (len > priv->size - to)
485 len = priv->size - to;
486
487 /* Copy from buf to vram */
488 count = len;
489 while (count) {
490 unsigned int offset, avail;
491 unsigned int entry;
492
493 offset = (unsigned int) (to & (priv->cache.page_size - 1));
494 avail = priv->cache.page_size - offset;
495
496 entry = ps3vram_cache_match(dev, to);
497 cached = CACHE_OFFSET + entry * priv->cache.page_size + offset;
498
499 dev_dbg(&dev->core, "%s: to=%08x cached=%08x offset=%08x "
500 "avail=%08x count=%08x\n", __func__, (unsigned int)to,
501 cached, offset, avail, count);
502
503 if (avail > count)
504 avail = count;
505 memcpy(priv->xdr_buf + cached, buf, avail);
506
507 priv->cache.tags[entry].flags |= CACHE_PAGE_DIRTY;
508
509 buf += avail;
510 count -= avail;
511 to += avail;
512 }
513
514 *retlen = len;
515 return 0;
516 }
517
518 static int ps3vram_proc_show(struct seq_file *m, void *v)
519 {
520 struct ps3vram_priv *priv = m->private;
521
522 seq_printf(m, "hit:%u\nmiss:%u\n", priv->cache.hit, priv->cache.miss);
523 return 0;
524 }
525
526 static int ps3vram_proc_open(struct inode *inode, struct file *file)
527 {
528 return single_open(file, ps3vram_proc_show, PDE_DATA(inode));
529 }
530
531 static const struct file_operations ps3vram_proc_fops = {
532 .owner = THIS_MODULE,
533 .open = ps3vram_proc_open,
534 .read = seq_read,
535 .llseek = seq_lseek,
536 .release = single_release,
537 };
538
539 static void ps3vram_proc_init(struct ps3_system_bus_device *dev)
540 {
541 struct ps3vram_priv *priv = ps3_system_bus_get_drvdata(dev);
542 struct proc_dir_entry *pde;
543
544 pde = proc_create_data(DEVICE_NAME, 0444, NULL, &ps3vram_proc_fops,
545 priv);
546 if (!pde)
547 dev_warn(&dev->core, "failed to create /proc entry\n");
548 }
549
550 static struct bio *ps3vram_do_bio(struct ps3_system_bus_device *dev,
551 struct bio *bio)
552 {
553 struct ps3vram_priv *priv = ps3_system_bus_get_drvdata(dev);
554 int write = bio_data_dir(bio) == WRITE;
555 const char *op = write ? "write" : "read";
556 loff_t offset = bio->bi_sector << 9;
557 int error = 0;
558 struct bio_vec *bvec;
559 unsigned int i;
560 struct bio *next;
561
562 bio_for_each_segment(bvec, bio, i) {
563 /* PS3 is ppc64, so we don't handle highmem */
564 char *ptr = page_address(bvec->bv_page) + bvec->bv_offset;
565 size_t len = bvec->bv_len, retlen;
566
567 dev_dbg(&dev->core, " %s %zu bytes at offset %llu\n", op,
568 len, offset);
569 if (write)
570 error = ps3vram_write(dev, offset, len, &retlen, ptr);
571 else
572 error = ps3vram_read(dev, offset, len, &retlen, ptr);
573
574 if (error) {
575 dev_err(&dev->core, "%s failed\n", op);
576 goto out;
577 }
578
579 if (retlen != len) {
580 dev_err(&dev->core, "Short %s\n", op);
581 error = -EIO;
582 goto out;
583 }
584
585 offset += len;
586 }
587
588 dev_dbg(&dev->core, "%s completed\n", op);
589
590 out:
591 spin_lock_irq(&priv->lock);
592 bio_list_pop(&priv->list);
593 next = bio_list_peek(&priv->list);
594 spin_unlock_irq(&priv->lock);
595
596 bio_endio(bio, error);
597 return next;
598 }
599
600 static void ps3vram_make_request(struct request_queue *q, struct bio *bio)
601 {
602 struct ps3_system_bus_device *dev = q->queuedata;
603 struct ps3vram_priv *priv = ps3_system_bus_get_drvdata(dev);
604 int busy;
605
606 dev_dbg(&dev->core, "%s\n", __func__);
607
608 spin_lock_irq(&priv->lock);
609 busy = !bio_list_empty(&priv->list);
610 bio_list_add(&priv->list, bio);
611 spin_unlock_irq(&priv->lock);
612
613 if (busy)
614 return;
615
616 do {
617 bio = ps3vram_do_bio(dev, bio);
618 } while (bio);
619 }
620
621 static int ps3vram_probe(struct ps3_system_bus_device *dev)
622 {
623 struct ps3vram_priv *priv;
624 int error, status;
625 struct request_queue *queue;
626 struct gendisk *gendisk;
627 u64 ddr_size, ddr_lpar, ctrl_lpar, info_lpar, reports_lpar,
628 reports_size, xdr_lpar;
629 char *rest;
630
631 priv = kzalloc(sizeof(*priv), GFP_KERNEL);
632 if (!priv) {
633 error = -ENOMEM;
634 goto fail;
635 }
636
637 spin_lock_init(&priv->lock);
638 bio_list_init(&priv->list);
639 ps3_system_bus_set_drvdata(dev, priv);
640
641 /* Allocate XDR buffer (1MiB aligned) */
642 priv->xdr_buf = (void *)__get_free_pages(GFP_KERNEL,
643 get_order(XDR_BUF_SIZE));
644 if (priv->xdr_buf == NULL) {
645 dev_err(&dev->core, "Could not allocate XDR buffer\n");
646 error = -ENOMEM;
647 goto fail_free_priv;
648 }
649
650 /* Put FIFO at begginning of XDR buffer */
651 priv->fifo_base = (u32 *) (priv->xdr_buf + FIFO_OFFSET);
652 priv->fifo_ptr = priv->fifo_base;
653
654 /* XXX: Need to open GPU, in case ps3fb or snd_ps3 aren't loaded */
655 if (ps3_open_hv_device(dev)) {
656 dev_err(&dev->core, "ps3_open_hv_device failed\n");
657 error = -EAGAIN;
658 goto out_free_xdr_buf;
659 }
660
661 /* Request memory */
662 status = -1;
663 ddr_size = ALIGN(memparse(size, &rest), 1024*1024);
664 if (!ddr_size) {
665 dev_err(&dev->core, "Specified size is too small\n");
666 error = -EINVAL;
667 goto out_close_gpu;
668 }
669
670 while (ddr_size > 0) {
671 status = lv1_gpu_memory_allocate(ddr_size, 0, 0, 0, 0,
672 &priv->memory_handle,
673 &ddr_lpar);
674 if (!status)
675 break;
676 ddr_size -= 1024*1024;
677 }
678 if (status) {
679 dev_err(&dev->core, "lv1_gpu_memory_allocate failed %d\n",
680 status);
681 error = -ENOMEM;
682 goto out_close_gpu;
683 }
684
685 /* Request context */
686 status = lv1_gpu_context_allocate(priv->memory_handle, 0,
687 &priv->context_handle, &ctrl_lpar,
688 &info_lpar, &reports_lpar,
689 &reports_size);
690 if (status) {
691 dev_err(&dev->core, "lv1_gpu_context_allocate failed %d\n",
692 status);
693 error = -ENOMEM;
694 goto out_free_memory;
695 }
696
697 /* Map XDR buffer to RSX */
698 xdr_lpar = ps3_mm_phys_to_lpar(__pa(priv->xdr_buf));
699 status = lv1_gpu_context_iomap(priv->context_handle, XDR_IOIF,
700 xdr_lpar, XDR_BUF_SIZE,
701 CBE_IOPTE_PP_W | CBE_IOPTE_PP_R |
702 CBE_IOPTE_M);
703 if (status) {
704 dev_err(&dev->core, "lv1_gpu_context_iomap failed %d\n",
705 status);
706 error = -ENOMEM;
707 goto out_free_context;
708 }
709
710 priv->ctrl = ioremap(ctrl_lpar, 64 * 1024);
711 if (!priv->ctrl) {
712 dev_err(&dev->core, "ioremap CTRL failed\n");
713 error = -ENOMEM;
714 goto out_unmap_context;
715 }
716
717 priv->reports = ioremap(reports_lpar, reports_size);
718 if (!priv->reports) {
719 dev_err(&dev->core, "ioremap REPORTS failed\n");
720 error = -ENOMEM;
721 goto out_unmap_ctrl;
722 }
723
724 mutex_lock(&ps3_gpu_mutex);
725 ps3vram_init_ring(dev);
726 mutex_unlock(&ps3_gpu_mutex);
727
728 priv->size = ddr_size;
729
730 ps3vram_bind(dev);
731
732 mutex_lock(&ps3_gpu_mutex);
733 error = ps3vram_wait_ring(dev, 100);
734 mutex_unlock(&ps3_gpu_mutex);
735 if (error < 0) {
736 dev_err(&dev->core, "Failed to initialize channels\n");
737 error = -ETIMEDOUT;
738 goto out_unmap_reports;
739 }
740
741 ps3vram_cache_init(dev);
742 ps3vram_proc_init(dev);
743
744 queue = blk_alloc_queue(GFP_KERNEL);
745 if (!queue) {
746 dev_err(&dev->core, "blk_alloc_queue failed\n");
747 error = -ENOMEM;
748 goto out_cache_cleanup;
749 }
750
751 priv->queue = queue;
752 queue->queuedata = dev;
753 blk_queue_make_request(queue, ps3vram_make_request);
754 blk_queue_max_segments(queue, BLK_MAX_SEGMENTS);
755 blk_queue_max_segment_size(queue, BLK_MAX_SEGMENT_SIZE);
756 blk_queue_max_hw_sectors(queue, BLK_SAFE_MAX_SECTORS);
757
758 gendisk = alloc_disk(1);
759 if (!gendisk) {
760 dev_err(&dev->core, "alloc_disk failed\n");
761 error = -ENOMEM;
762 goto fail_cleanup_queue;
763 }
764
765 priv->gendisk = gendisk;
766 gendisk->major = ps3vram_major;
767 gendisk->first_minor = 0;
768 gendisk->fops = &ps3vram_fops;
769 gendisk->queue = queue;
770 gendisk->private_data = dev;
771 gendisk->driverfs_dev = &dev->core;
772 strlcpy(gendisk->disk_name, DEVICE_NAME, sizeof(gendisk->disk_name));
773 set_capacity(gendisk, priv->size >> 9);
774
775 dev_info(&dev->core, "%s: Using %lu MiB of GPU memory\n",
776 gendisk->disk_name, get_capacity(gendisk) >> 11);
777
778 add_disk(gendisk);
779 return 0;
780
781 fail_cleanup_queue:
782 blk_cleanup_queue(queue);
783 out_cache_cleanup:
784 remove_proc_entry(DEVICE_NAME, NULL);
785 ps3vram_cache_cleanup(dev);
786 out_unmap_reports:
787 iounmap(priv->reports);
788 out_unmap_ctrl:
789 iounmap(priv->ctrl);
790 out_unmap_context:
791 lv1_gpu_context_iomap(priv->context_handle, XDR_IOIF, xdr_lpar,
792 XDR_BUF_SIZE, CBE_IOPTE_M);
793 out_free_context:
794 lv1_gpu_context_free(priv->context_handle);
795 out_free_memory:
796 lv1_gpu_memory_free(priv->memory_handle);
797 out_close_gpu:
798 ps3_close_hv_device(dev);
799 out_free_xdr_buf:
800 free_pages((unsigned long) priv->xdr_buf, get_order(XDR_BUF_SIZE));
801 fail_free_priv:
802 kfree(priv);
803 ps3_system_bus_set_drvdata(dev, NULL);
804 fail:
805 return error;
806 }
807
808 static int ps3vram_remove(struct ps3_system_bus_device *dev)
809 {
810 struct ps3vram_priv *priv = ps3_system_bus_get_drvdata(dev);
811
812 del_gendisk(priv->gendisk);
813 put_disk(priv->gendisk);
814 blk_cleanup_queue(priv->queue);
815 remove_proc_entry(DEVICE_NAME, NULL);
816 ps3vram_cache_cleanup(dev);
817 iounmap(priv->reports);
818 iounmap(priv->ctrl);
819 lv1_gpu_context_iomap(priv->context_handle, XDR_IOIF,
820 ps3_mm_phys_to_lpar(__pa(priv->xdr_buf)),
821 XDR_BUF_SIZE, CBE_IOPTE_M);
822 lv1_gpu_context_free(priv->context_handle);
823 lv1_gpu_memory_free(priv->memory_handle);
824 ps3_close_hv_device(dev);
825 free_pages((unsigned long) priv->xdr_buf, get_order(XDR_BUF_SIZE));
826 kfree(priv);
827 ps3_system_bus_set_drvdata(dev, NULL);
828 return 0;
829 }
830
831 static struct ps3_system_bus_driver ps3vram = {
832 .match_id = PS3_MATCH_ID_GPU,
833 .match_sub_id = PS3_MATCH_SUB_ID_GPU_RAMDISK,
834 .core.name = DEVICE_NAME,
835 .core.owner = THIS_MODULE,
836 .probe = ps3vram_probe,
837 .remove = ps3vram_remove,
838 .shutdown = ps3vram_remove,
839 };
840
841
842 static int __init ps3vram_init(void)
843 {
844 int error;
845
846 if (!firmware_has_feature(FW_FEATURE_PS3_LV1))
847 return -ENODEV;
848
849 error = register_blkdev(0, DEVICE_NAME);
850 if (error <= 0) {
851 pr_err("%s: register_blkdev failed %d\n", DEVICE_NAME, error);
852 return error;
853 }
854 ps3vram_major = error;
855
856 pr_info("%s: registered block device major %d\n", DEVICE_NAME,
857 ps3vram_major);
858
859 error = ps3_system_bus_driver_register(&ps3vram);
860 if (error)
861 unregister_blkdev(ps3vram_major, DEVICE_NAME);
862
863 return error;
864 }
865
866 static void __exit ps3vram_exit(void)
867 {
868 ps3_system_bus_driver_unregister(&ps3vram);
869 unregister_blkdev(ps3vram_major, DEVICE_NAME);
870 }
871
872 module_init(ps3vram_init);
873 module_exit(ps3vram_exit);
874
875 MODULE_LICENSE("GPL");
876 MODULE_DESCRIPTION("PS3 Video RAM Storage Driver");
877 MODULE_AUTHOR("Sony Corporation");
878 MODULE_ALIAS(PS3_MODULE_ALIAS_GPU_RAMDISK);
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