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Staging: comedi: mark a variable as __user
[linux/fpc-iii.git] / drivers / block / ps3vram.c
blobb3bdb8af89cfad5e80e8ea9d01f5134c1872fbbe
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/proc_fs.h>
14 #include <linux/seq_file.h>
15 #include <linux/slab.h>
16
17 #include <asm/cell-regs.h>
18 #include <asm/firmware.h>
19 #include <asm/lv1call.h>
20 #include <asm/ps3.h>
21 #include <asm/ps3gpu.h>
22
23
24 #define DEVICE_NAME "ps3vram"
25
26
27 #define XDR_BUF_SIZE (2 * 1024 * 1024) /* XDR buffer (must be 1MiB aligned) */
28 #define XDR_IOIF 0x0c000000
29
30 #define FIFO_BASE XDR_IOIF
31 #define FIFO_SIZE (64 * 1024)
32
33 #define DMA_PAGE_SIZE (4 * 1024)
34
35 #define CACHE_PAGE_SIZE (256 * 1024)
36 #define CACHE_PAGE_COUNT ((XDR_BUF_SIZE - FIFO_SIZE) / CACHE_PAGE_SIZE)
37
38 #define CACHE_OFFSET CACHE_PAGE_SIZE
39 #define FIFO_OFFSET 0
40
41 #define CTRL_PUT 0x10
42 #define CTRL_GET 0x11
43 #define CTRL_TOP 0x15
44
45 #define UPLOAD_SUBCH 1
46 #define DOWNLOAD_SUBCH 2
47
48 #define NV_MEMORY_TO_MEMORY_FORMAT_OFFSET_IN 0x0000030c
49 #define NV_MEMORY_TO_MEMORY_FORMAT_NOTIFY 0x00000104
50
51 #define CACHE_PAGE_PRESENT 1
52 #define CACHE_PAGE_DIRTY 2
53
54 struct ps3vram_tag {
55 unsigned int address;
56 unsigned int flags;
57 };
58
59 struct ps3vram_cache {
60 unsigned int page_count;
61 unsigned int page_size;
62 struct ps3vram_tag *tags;
63 unsigned int hit;
64 unsigned int miss;
65 };
66
67 struct ps3vram_priv {
68 struct request_queue *queue;
69 struct gendisk *gendisk;
70
71 u64 size;
72
73 u64 memory_handle;
74 u64 context_handle;
75 u32 *ctrl;
76 void *reports;
77 u8 *xdr_buf;
78
79 u32 *fifo_base;
80 u32 *fifo_ptr;
81
82 struct ps3vram_cache cache;
83
84 spinlock_t lock; /* protecting list of bios */
85 struct bio_list list;
86 };
87
88
89 static int ps3vram_major;
90
91
92 static const struct block_device_operations ps3vram_fops = {
93 .owner = THIS_MODULE,
94 };
95
96
97 #define DMA_NOTIFIER_HANDLE_BASE 0x66604200 /* first DMA notifier handle */
98 #define DMA_NOTIFIER_OFFSET_BASE 0x1000 /* first DMA notifier offset */
99 #define DMA_NOTIFIER_SIZE 0x40
100 #define NOTIFIER 7 /* notifier used for completion report */
101
102 static char *size = "256M";
103 module_param(size, charp, 0);
104 MODULE_PARM_DESC(size, "memory size");
105
106 static u32 *ps3vram_get_notifier(void *reports, int notifier)
107 {
108 return reports + DMA_NOTIFIER_OFFSET_BASE +
109 DMA_NOTIFIER_SIZE * notifier;
110 }
111
112 static void ps3vram_notifier_reset(struct ps3_system_bus_device *dev)
113 {
114 struct ps3vram_priv *priv = ps3_system_bus_get_drvdata(dev);
115 u32 *notify = ps3vram_get_notifier(priv->reports, NOTIFIER);
116 int i;
117
118 for (i = 0; i < 4; i++)
119 notify[i] = 0xffffffff;
120 }
121
122 static int ps3vram_notifier_wait(struct ps3_system_bus_device *dev,
123 unsigned int timeout_ms)
124 {
125 struct ps3vram_priv *priv = ps3_system_bus_get_drvdata(dev);
126 u32 *notify = ps3vram_get_notifier(priv->reports, NOTIFIER);
127 unsigned long timeout;
128
129 for (timeout = 20; timeout; timeout--) {
130 if (!notify[3])
131 return 0;
132 udelay(10);
133 }
134
135 timeout = jiffies + msecs_to_jiffies(timeout_ms);
136
137 do {
138 if (!notify[3])
139 return 0;
140 msleep(1);
141 } while (time_before(jiffies, timeout));
142
143 return -ETIMEDOUT;
144 }
145
146 static void ps3vram_init_ring(struct ps3_system_bus_device *dev)
147 {
148 struct ps3vram_priv *priv = ps3_system_bus_get_drvdata(dev);
149
150 priv->ctrl[CTRL_PUT] = FIFO_BASE + FIFO_OFFSET;
151 priv->ctrl[CTRL_GET] = FIFO_BASE + FIFO_OFFSET;
152 }
153
154 static int ps3vram_wait_ring(struct ps3_system_bus_device *dev,
155 unsigned int timeout_ms)
156 {
157 struct ps3vram_priv *priv = ps3_system_bus_get_drvdata(dev);
158 unsigned long timeout = jiffies + msecs_to_jiffies(timeout_ms);
159
160 do {
161 if (priv->ctrl[CTRL_PUT] == priv->ctrl[CTRL_GET])
162 return 0;
163 msleep(1);
164 } while (time_before(jiffies, timeout));
165
166 dev_warn(&dev->core, "FIFO timeout (%08x/%08x/%08x)\n",
167 priv->ctrl[CTRL_PUT], priv->ctrl[CTRL_GET],
168 priv->ctrl[CTRL_TOP]);
169
170 return -ETIMEDOUT;
171 }
172
173 static void ps3vram_out_ring(struct ps3vram_priv *priv, u32 data)
174 {
175 *(priv->fifo_ptr)++ = data;
176 }
177
178 static void ps3vram_begin_ring(struct ps3vram_priv *priv, u32 chan, u32 tag,
179 u32 size)
180 {
181 ps3vram_out_ring(priv, (size << 18) | (chan << 13) | tag);
182 }
183
184 static void ps3vram_rewind_ring(struct ps3_system_bus_device *dev)
185 {
186 struct ps3vram_priv *priv = ps3_system_bus_get_drvdata(dev);
187 int status;
188
189 ps3vram_out_ring(priv, 0x20000000 | (FIFO_BASE + FIFO_OFFSET));
190
191 priv->ctrl[CTRL_PUT] = FIFO_BASE + FIFO_OFFSET;
192
193 /* asking the HV for a blit will kick the FIFO */
194 status = lv1_gpu_fb_blit(priv->context_handle, 0, 0, 0, 0);
195 if (status)
196 dev_err(&dev->core, "%s: lv1_gpu_fb_blit failed %d\n",
197 __func__, status);
198
199 priv->fifo_ptr = priv->fifo_base;
200 }
201
202 static void ps3vram_fire_ring(struct ps3_system_bus_device *dev)
203 {
204 struct ps3vram_priv *priv = ps3_system_bus_get_drvdata(dev);
205 int status;
206
207 mutex_lock(&ps3_gpu_mutex);
208
209 priv->ctrl[CTRL_PUT] = FIFO_BASE + FIFO_OFFSET +
210 (priv->fifo_ptr - priv->fifo_base) * sizeof(u32);
211
212 /* asking the HV for a blit will kick the FIFO */
213 status = lv1_gpu_fb_blit(priv->context_handle, 0, 0, 0, 0);
214 if (status)
215 dev_err(&dev->core, "%s: lv1_gpu_fb_blit failed %d\n",
216 __func__, status);
217
218 if ((priv->fifo_ptr - priv->fifo_base) * sizeof(u32) >
219 FIFO_SIZE - 1024) {
220 dev_dbg(&dev->core, "FIFO full, rewinding\n");
221 ps3vram_wait_ring(dev, 200);
222 ps3vram_rewind_ring(dev);
223 }
224
225 mutex_unlock(&ps3_gpu_mutex);
226 }
227
228 static void ps3vram_bind(struct ps3_system_bus_device *dev)
229 {
230 struct ps3vram_priv *priv = ps3_system_bus_get_drvdata(dev);
231
232 ps3vram_begin_ring(priv, UPLOAD_SUBCH, 0, 1);
233 ps3vram_out_ring(priv, 0x31337303);
234 ps3vram_begin_ring(priv, UPLOAD_SUBCH, 0x180, 3);
235 ps3vram_out_ring(priv, DMA_NOTIFIER_HANDLE_BASE + NOTIFIER);
236 ps3vram_out_ring(priv, 0xfeed0001); /* DMA system RAM instance */
237 ps3vram_out_ring(priv, 0xfeed0000); /* DMA video RAM instance */
238
239 ps3vram_begin_ring(priv, DOWNLOAD_SUBCH, 0, 1);
240 ps3vram_out_ring(priv, 0x3137c0de);
241 ps3vram_begin_ring(priv, DOWNLOAD_SUBCH, 0x180, 3);
242 ps3vram_out_ring(priv, DMA_NOTIFIER_HANDLE_BASE + NOTIFIER);
243 ps3vram_out_ring(priv, 0xfeed0000); /* DMA video RAM instance */
244 ps3vram_out_ring(priv, 0xfeed0001); /* DMA system RAM instance */
245
246 ps3vram_fire_ring(dev);
247 }
248
249 static int ps3vram_upload(struct ps3_system_bus_device *dev,
250 unsigned int src_offset, unsigned int dst_offset,
251 int len, int count)
252 {
253 struct ps3vram_priv *priv = ps3_system_bus_get_drvdata(dev);
254
255 ps3vram_begin_ring(priv, UPLOAD_SUBCH,
256 NV_MEMORY_TO_MEMORY_FORMAT_OFFSET_IN, 8);
257 ps3vram_out_ring(priv, XDR_IOIF + src_offset);
258 ps3vram_out_ring(priv, dst_offset);
259 ps3vram_out_ring(priv, len);
260 ps3vram_out_ring(priv, len);
261 ps3vram_out_ring(priv, len);
262 ps3vram_out_ring(priv, count);
263 ps3vram_out_ring(priv, (1 << 8) | 1);
264 ps3vram_out_ring(priv, 0);
265
266 ps3vram_notifier_reset(dev);
267 ps3vram_begin_ring(priv, UPLOAD_SUBCH,
268 NV_MEMORY_TO_MEMORY_FORMAT_NOTIFY, 1);
269 ps3vram_out_ring(priv, 0);
270 ps3vram_begin_ring(priv, UPLOAD_SUBCH, 0x100, 1);
271 ps3vram_out_ring(priv, 0);
272 ps3vram_fire_ring(dev);
273 if (ps3vram_notifier_wait(dev, 200) < 0) {
274 dev_warn(&dev->core, "%s: Notifier timeout\n", __func__);
275 return -1;
276 }
277
278 return 0;
279 }
280
281 static int ps3vram_download(struct ps3_system_bus_device *dev,
282 unsigned int src_offset, unsigned int dst_offset,
283 int len, int count)
284 {
285 struct ps3vram_priv *priv = ps3_system_bus_get_drvdata(dev);
286
287 ps3vram_begin_ring(priv, DOWNLOAD_SUBCH,
288 NV_MEMORY_TO_MEMORY_FORMAT_OFFSET_IN, 8);
289 ps3vram_out_ring(priv, src_offset);
290 ps3vram_out_ring(priv, XDR_IOIF + dst_offset);
291 ps3vram_out_ring(priv, len);
292 ps3vram_out_ring(priv, len);
293 ps3vram_out_ring(priv, len);
294 ps3vram_out_ring(priv, count);
295 ps3vram_out_ring(priv, (1 << 8) | 1);
296 ps3vram_out_ring(priv, 0);
297
298 ps3vram_notifier_reset(dev);
299 ps3vram_begin_ring(priv, DOWNLOAD_SUBCH,
300 NV_MEMORY_TO_MEMORY_FORMAT_NOTIFY, 1);
301 ps3vram_out_ring(priv, 0);
302 ps3vram_begin_ring(priv, DOWNLOAD_SUBCH, 0x100, 1);
303 ps3vram_out_ring(priv, 0);
304 ps3vram_fire_ring(dev);
305 if (ps3vram_notifier_wait(dev, 200) < 0) {
306 dev_warn(&dev->core, "%s: Notifier timeout\n", __func__);
307 return -1;
308 }
309
310 return 0;
311 }
312
313 static void ps3vram_cache_evict(struct ps3_system_bus_device *dev, int entry)
314 {
315 struct ps3vram_priv *priv = ps3_system_bus_get_drvdata(dev);
316 struct ps3vram_cache *cache = &priv->cache;
317
318 if (!(cache->tags[entry].flags & CACHE_PAGE_DIRTY))
319 return;
320
321 dev_dbg(&dev->core, "Flushing %d: 0x%08x\n", entry,
322 cache->tags[entry].address);
323 if (ps3vram_upload(dev, CACHE_OFFSET + entry * cache->page_size,
324 cache->tags[entry].address, DMA_PAGE_SIZE,
325 cache->page_size / DMA_PAGE_SIZE) < 0) {
326 dev_err(&dev->core,
327 "Failed to upload from 0x%x to " "0x%x size 0x%x\n",
328 entry * cache->page_size, cache->tags[entry].address,
329 cache->page_size);
330 }
331 cache->tags[entry].flags &= ~CACHE_PAGE_DIRTY;
332 }
333
334 static void ps3vram_cache_load(struct ps3_system_bus_device *dev, int entry,
335 unsigned int address)
336 {
337 struct ps3vram_priv *priv = ps3_system_bus_get_drvdata(dev);
338 struct ps3vram_cache *cache = &priv->cache;
339
340 dev_dbg(&dev->core, "Fetching %d: 0x%08x\n", entry, address);
341 if (ps3vram_download(dev, address,
342 CACHE_OFFSET + entry * cache->page_size,
343 DMA_PAGE_SIZE,
344 cache->page_size / DMA_PAGE_SIZE) < 0) {
345 dev_err(&dev->core,
346 "Failed to download from 0x%x to 0x%x size 0x%x\n",
347 address, entry * cache->page_size, cache->page_size);
348 }
349
350 cache->tags[entry].address = address;
351 cache->tags[entry].flags |= CACHE_PAGE_PRESENT;
352 }
353
354
355 static void ps3vram_cache_flush(struct ps3_system_bus_device *dev)
356 {
357 struct ps3vram_priv *priv = ps3_system_bus_get_drvdata(dev);
358 struct ps3vram_cache *cache = &priv->cache;
359 int i;
360
361 dev_dbg(&dev->core, "FLUSH\n");
362 for (i = 0; i < cache->page_count; i++) {
363 ps3vram_cache_evict(dev, i);
364 cache->tags[i].flags = 0;
365 }
366 }
367
368 static unsigned int ps3vram_cache_match(struct ps3_system_bus_device *dev,
369 loff_t address)
370 {
371 struct ps3vram_priv *priv = ps3_system_bus_get_drvdata(dev);
372 struct ps3vram_cache *cache = &priv->cache;
373 unsigned int base;
374 unsigned int offset;
375 int i;
376 static int counter;
377
378 offset = (unsigned int) (address & (cache->page_size - 1));
379 base = (unsigned int) (address - offset);
380
381 /* fully associative check */
382 for (i = 0; i < cache->page_count; i++) {
383 if ((cache->tags[i].flags & CACHE_PAGE_PRESENT) &&
384 cache->tags[i].address == base) {
385 cache->hit++;
386 dev_dbg(&dev->core, "Found entry %d: 0x%08x\n", i,
387 cache->tags[i].address);
388 return i;
389 }
390 }
391
392 /* choose a random entry */
393 i = (jiffies + (counter++)) % cache->page_count;
394 dev_dbg(&dev->core, "Using entry %d\n", i);
395
396 ps3vram_cache_evict(dev, i);
397 ps3vram_cache_load(dev, i, base);
398
399 cache->miss++;
400 return i;
401 }
402
403 static int ps3vram_cache_init(struct ps3_system_bus_device *dev)
404 {
405 struct ps3vram_priv *priv = ps3_system_bus_get_drvdata(dev);
406
407 priv->cache.page_count = CACHE_PAGE_COUNT;
408 priv->cache.page_size = CACHE_PAGE_SIZE;
409 priv->cache.tags = kzalloc(sizeof(struct ps3vram_tag) *
410 CACHE_PAGE_COUNT, GFP_KERNEL);
411 if (priv->cache.tags == NULL) {
412 dev_err(&dev->core, "Could not allocate cache tags\n");
413 return -ENOMEM;
414 }
415
416 dev_info(&dev->core, "Created ram cache: %d entries, %d KiB each\n",
417 CACHE_PAGE_COUNT, CACHE_PAGE_SIZE / 1024);
418
419 return 0;
420 }
421
422 static void ps3vram_cache_cleanup(struct ps3_system_bus_device *dev)
423 {
424 struct ps3vram_priv *priv = ps3_system_bus_get_drvdata(dev);
425
426 ps3vram_cache_flush(dev);
427 kfree(priv->cache.tags);
428 }
429
430 static int ps3vram_read(struct ps3_system_bus_device *dev, loff_t from,
431 size_t len, size_t *retlen, u_char *buf)
432 {
433 struct ps3vram_priv *priv = ps3_system_bus_get_drvdata(dev);
434 unsigned int cached, count;
435
436 dev_dbg(&dev->core, "%s: from=0x%08x len=0x%zx\n", __func__,
437 (unsigned int)from, len);
438
439 if (from >= priv->size)
440 return -EIO;
441
442 if (len > priv->size - from)
443 len = priv->size - from;
444
445 /* Copy from vram to buf */
446 count = len;
447 while (count) {
448 unsigned int offset, avail;
449 unsigned int entry;
450
451 offset = (unsigned int) (from & (priv->cache.page_size - 1));
452 avail = priv->cache.page_size - offset;
453
454 entry = ps3vram_cache_match(dev, from);
455 cached = CACHE_OFFSET + entry * priv->cache.page_size + offset;
456
457 dev_dbg(&dev->core, "%s: from=%08x cached=%08x offset=%08x "
458 "avail=%08x count=%08x\n", __func__,
459 (unsigned int)from, cached, offset, avail, count);
460
461 if (avail > count)
462 avail = count;
463 memcpy(buf, priv->xdr_buf + cached, avail);
464
465 buf += avail;
466 count -= avail;
467 from += avail;
468 }
469
470 *retlen = len;
471 return 0;
472 }
473
474 static int ps3vram_write(struct ps3_system_bus_device *dev, loff_t to,
475 size_t len, size_t *retlen, const u_char *buf)
476 {
477 struct ps3vram_priv *priv = ps3_system_bus_get_drvdata(dev);
478 unsigned int cached, count;
479
480 if (to >= priv->size)
481 return -EIO;
482
483 if (len > priv->size - to)
484 len = priv->size - to;
485
486 /* Copy from buf to vram */
487 count = len;
488 while (count) {
489 unsigned int offset, avail;
490 unsigned int entry;
491
492 offset = (unsigned int) (to & (priv->cache.page_size - 1));
493 avail = priv->cache.page_size - offset;
494
495 entry = ps3vram_cache_match(dev, to);
496 cached = CACHE_OFFSET + entry * priv->cache.page_size + offset;
497
498 dev_dbg(&dev->core, "%s: to=%08x cached=%08x offset=%08x "
499 "avail=%08x count=%08x\n", __func__, (unsigned int)to,
500 cached, offset, avail, count);
501
502 if (avail > count)
503 avail = count;
504 memcpy(priv->xdr_buf + cached, buf, avail);
505
506 priv->cache.tags[entry].flags |= CACHE_PAGE_DIRTY;
507
508 buf += avail;
509 count -= avail;
510 to += avail;
511 }
512
513 *retlen = len;
514 return 0;
515 }
516
517 static int ps3vram_proc_show(struct seq_file *m, void *v)
518 {
519 struct ps3vram_priv *priv = m->private;
520
521 seq_printf(m, "hit:%u\nmiss:%u\n", priv->cache.hit, priv->cache.miss);
522 return 0;
523 }
524
525 static int ps3vram_proc_open(struct inode *inode, struct file *file)
526 {
527 return single_open(file, ps3vram_proc_show, PDE(inode)->data);
528 }
529
530 static const struct file_operations ps3vram_proc_fops = {
531 .owner = THIS_MODULE,
532 .open = ps3vram_proc_open,
533 .read = seq_read,
534 .llseek = seq_lseek,
535 .release = single_release,
536 };
537
538 static void __devinit ps3vram_proc_init(struct ps3_system_bus_device *dev)
539 {
540 struct ps3vram_priv *priv = ps3_system_bus_get_drvdata(dev);
541 struct proc_dir_entry *pde;
542
543 pde = proc_create_data(DEVICE_NAME, 0444, NULL, &ps3vram_proc_fops,
544 priv);
545 if (!pde)
546 dev_warn(&dev->core, "failed to create /proc entry\n");
547 }
548
549 static struct bio *ps3vram_do_bio(struct ps3_system_bus_device *dev,
550 struct bio *bio)
551 {
552 struct ps3vram_priv *priv = ps3_system_bus_get_drvdata(dev);
553 int write = bio_data_dir(bio) == WRITE;
554 const char *op = write ? "write" : "read";
555 loff_t offset = bio->bi_sector << 9;
556 int error = 0;
557 struct bio_vec *bvec;
558 unsigned int i;
559 struct bio *next;
560
561 bio_for_each_segment(bvec, bio, i) {
562 /* PS3 is ppc64, so we don't handle highmem */
563 char *ptr = page_address(bvec->bv_page) + bvec->bv_offset;
564 size_t len = bvec->bv_len, retlen;
565
566 dev_dbg(&dev->core, " %s %zu bytes at offset %llu\n", op,
567 len, offset);
568 if (write)
569 error = ps3vram_write(dev, offset, len, &retlen, ptr);
570 else
571 error = ps3vram_read(dev, offset, len, &retlen, ptr);
572
573 if (error) {
574 dev_err(&dev->core, "%s failed\n", op);
575 goto out;
576 }
577
578 if (retlen != len) {
579 dev_err(&dev->core, "Short %s\n", op);
580 error = -EIO;
581 goto out;
582 }
583
584 offset += len;
585 }
586
587 dev_dbg(&dev->core, "%s completed\n", op);
588
589 out:
590 spin_lock_irq(&priv->lock);
591 bio_list_pop(&priv->list);
592 next = bio_list_peek(&priv->list);
593 spin_unlock_irq(&priv->lock);
594
595 bio_endio(bio, error);
596 return next;
597 }
598
599 static int ps3vram_make_request(struct request_queue *q, struct bio *bio)
600 {
601 struct ps3_system_bus_device *dev = q->queuedata;
602 struct ps3vram_priv *priv = ps3_system_bus_get_drvdata(dev);
603 int busy;
604
605 dev_dbg(&dev->core, "%s\n", __func__);
606
607 spin_lock_irq(&priv->lock);
608 busy = !bio_list_empty(&priv->list);
609 bio_list_add(&priv->list, bio);
610 spin_unlock_irq(&priv->lock);
611
612 if (busy)
613 return 0;
614
615 do {
616 bio = ps3vram_do_bio(dev, bio);
617 } while (bio);
618
619 return 0;
620 }
621
622 static int __devinit ps3vram_probe(struct ps3_system_bus_device *dev)
623 {
624 struct ps3vram_priv *priv;
625 int error, status;
626 struct request_queue *queue;
627 struct gendisk *gendisk;
628 u64 ddr_size, ddr_lpar, ctrl_lpar, info_lpar, reports_lpar,
629 reports_size, xdr_lpar;
630 char *rest;
631
632 priv = kzalloc(sizeof(*priv), GFP_KERNEL);
633 if (!priv) {
634 error = -ENOMEM;
635 goto fail;
636 }
637
638 spin_lock_init(&priv->lock);
639 bio_list_init(&priv->list);
640 ps3_system_bus_set_drvdata(dev, priv);
641
642 /* Allocate XDR buffer (1MiB aligned) */
643 priv->xdr_buf = (void *)__get_free_pages(GFP_KERNEL,
644 get_order(XDR_BUF_SIZE));
645 if (priv->xdr_buf == NULL) {
646 dev_err(&dev->core, "Could not allocate XDR buffer\n");
647 error = -ENOMEM;
648 goto fail_free_priv;
649 }
650
651 /* Put FIFO at begginning of XDR buffer */
652 priv->fifo_base = (u32 *) (priv->xdr_buf + FIFO_OFFSET);
653 priv->fifo_ptr = priv->fifo_base;
654
655 /* XXX: Need to open GPU, in case ps3fb or snd_ps3 aren't loaded */
656 if (ps3_open_hv_device(dev)) {
657 dev_err(&dev->core, "ps3_open_hv_device failed\n");
658 error = -EAGAIN;
659 goto out_free_xdr_buf;
660 }
661
662 /* Request memory */
663 status = -1;
664 ddr_size = ALIGN(memparse(size, &rest), 1024*1024);
665 if (!ddr_size) {
666 dev_err(&dev->core, "Specified size is too small\n");
667 error = -EINVAL;
668 goto out_close_gpu;
669 }
670
671 while (ddr_size > 0) {
672 status = lv1_gpu_memory_allocate(ddr_size, 0, 0, 0, 0,
673 &priv->memory_handle,
674 &ddr_lpar);
675 if (!status)
676 break;
677 ddr_size -= 1024*1024;
678 }
679 if (status) {
680 dev_err(&dev->core, "lv1_gpu_memory_allocate failed %d\n",
681 status);
682 error = -ENOMEM;
683 goto out_close_gpu;
684 }
685
686 /* Request context */
687 status = lv1_gpu_context_allocate(priv->memory_handle, 0,
688 &priv->context_handle, &ctrl_lpar,
689 &info_lpar, &reports_lpar,
690 &reports_size);
691 if (status) {
692 dev_err(&dev->core, "lv1_gpu_context_allocate failed %d\n",
693 status);
694 error = -ENOMEM;
695 goto out_free_memory;
696 }
697
698 /* Map XDR buffer to RSX */
699 xdr_lpar = ps3_mm_phys_to_lpar(__pa(priv->xdr_buf));
700 status = lv1_gpu_context_iomap(priv->context_handle, XDR_IOIF,
701 xdr_lpar, XDR_BUF_SIZE,
702 CBE_IOPTE_PP_W | CBE_IOPTE_PP_R |
703 CBE_IOPTE_M);
704 if (status) {
705 dev_err(&dev->core, "lv1_gpu_context_iomap failed %d\n",
706 status);
707 error = -ENOMEM;
708 goto out_free_context;
709 }
710
711 priv->ctrl = ioremap(ctrl_lpar, 64 * 1024);
712 if (!priv->ctrl) {
713 dev_err(&dev->core, "ioremap CTRL failed\n");
714 error = -ENOMEM;
715 goto out_unmap_context;
716 }
717
718 priv->reports = ioremap(reports_lpar, reports_size);
719 if (!priv->reports) {
720 dev_err(&dev->core, "ioremap REPORTS failed\n");
721 error = -ENOMEM;
722 goto out_unmap_ctrl;
723 }
724
725 mutex_lock(&ps3_gpu_mutex);
726 ps3vram_init_ring(dev);
727 mutex_unlock(&ps3_gpu_mutex);
728
729 priv->size = ddr_size;
730
731 ps3vram_bind(dev);
732
733 mutex_lock(&ps3_gpu_mutex);
734 error = ps3vram_wait_ring(dev, 100);
735 mutex_unlock(&ps3_gpu_mutex);
736 if (error < 0) {
737 dev_err(&dev->core, "Failed to initialize channels\n");
738 error = -ETIMEDOUT;
739 goto out_unmap_reports;
740 }
741
742 ps3vram_cache_init(dev);
743 ps3vram_proc_init(dev);
744
745 queue = blk_alloc_queue(GFP_KERNEL);
746 if (!queue) {
747 dev_err(&dev->core, "blk_alloc_queue failed\n");
748 error = -ENOMEM;
749 goto out_cache_cleanup;
750 }
751
752 priv->queue = queue;
753 queue->queuedata = dev;
754 blk_queue_make_request(queue, ps3vram_make_request);
755 blk_queue_max_segments(queue, BLK_MAX_SEGMENTS);
756 blk_queue_max_segment_size(queue, BLK_MAX_SEGMENT_SIZE);
757 blk_queue_max_hw_sectors(queue, BLK_SAFE_MAX_SECTORS);
758
759 gendisk = alloc_disk(1);
760 if (!gendisk) {
761 dev_err(&dev->core, "alloc_disk failed\n");
762 error = -ENOMEM;
763 goto fail_cleanup_queue;
764 }
765
766 priv->gendisk = gendisk;
767 gendisk->major = ps3vram_major;
768 gendisk->first_minor = 0;
769 gendisk->fops = &ps3vram_fops;
770 gendisk->queue = queue;
771 gendisk->private_data = dev;
772 gendisk->driverfs_dev = &dev->core;
773 strlcpy(gendisk->disk_name, DEVICE_NAME, sizeof(gendisk->disk_name));
774 set_capacity(gendisk, priv->size >> 9);
775
776 dev_info(&dev->core, "%s: Using %lu MiB of GPU memory\n",
777 gendisk->disk_name, get_capacity(gendisk) >> 11);
778
779 add_disk(gendisk);
780 return 0;
781
782 fail_cleanup_queue:
783 blk_cleanup_queue(queue);
784 out_cache_cleanup:
785 remove_proc_entry(DEVICE_NAME, NULL);
786 ps3vram_cache_cleanup(dev);
787 out_unmap_reports:
788 iounmap(priv->reports);
789 out_unmap_ctrl:
790 iounmap(priv->ctrl);
791 out_unmap_context:
792 lv1_gpu_context_iomap(priv->context_handle, XDR_IOIF, xdr_lpar,
793 XDR_BUF_SIZE, CBE_IOPTE_M);
794 out_free_context:
795 lv1_gpu_context_free(priv->context_handle);
796 out_free_memory:
797 lv1_gpu_memory_free(priv->memory_handle);
798 out_close_gpu:
799 ps3_close_hv_device(dev);
800 out_free_xdr_buf:
801 free_pages((unsigned long) priv->xdr_buf, get_order(XDR_BUF_SIZE));
802 fail_free_priv:
803 kfree(priv);
804 ps3_system_bus_set_drvdata(dev, NULL);
805 fail:
806 return error;
807 }
808
809 static int ps3vram_remove(struct ps3_system_bus_device *dev)
810 {
811 struct ps3vram_priv *priv = ps3_system_bus_get_drvdata(dev);
812
813 del_gendisk(priv->gendisk);
814 put_disk(priv->gendisk);
815 blk_cleanup_queue(priv->queue);
816 remove_proc_entry(DEVICE_NAME, NULL);
817 ps3vram_cache_cleanup(dev);
818 iounmap(priv->reports);
819 iounmap(priv->ctrl);
820 lv1_gpu_context_iomap(priv->context_handle, XDR_IOIF,
821 ps3_mm_phys_to_lpar(__pa(priv->xdr_buf)),
822 XDR_BUF_SIZE, CBE_IOPTE_M);
823 lv1_gpu_context_free(priv->context_handle);
824 lv1_gpu_memory_free(priv->memory_handle);
825 ps3_close_hv_device(dev);
826 free_pages((unsigned long) priv->xdr_buf, get_order(XDR_BUF_SIZE));
827 kfree(priv);
828 ps3_system_bus_set_drvdata(dev, NULL);
829 return 0;
830 }
831
832 static struct ps3_system_bus_driver ps3vram = {
833 .match_id = PS3_MATCH_ID_GPU,
834 .match_sub_id = PS3_MATCH_SUB_ID_GPU_RAMDISK,
835 .core.name = DEVICE_NAME,
836 .core.owner = THIS_MODULE,
837 .probe = ps3vram_probe,
838 .remove = ps3vram_remove,
839 .shutdown = ps3vram_remove,
840 };
841
842
843 static int __init ps3vram_init(void)
844 {
845 int error;
846
847 if (!firmware_has_feature(FW_FEATURE_PS3_LV1))
848 return -ENODEV;
849
850 error = register_blkdev(0, DEVICE_NAME);
851 if (error <= 0) {
852 pr_err("%s: register_blkdev failed %d\n", DEVICE_NAME, error);
853 return error;
854 }
855 ps3vram_major = error;
856
857 pr_info("%s: registered block device major %d\n", DEVICE_NAME,
858 ps3vram_major);
859
860 error = ps3_system_bus_driver_register(&ps3vram);
861 if (error)
862 unregister_blkdev(ps3vram_major, DEVICE_NAME);
863
864 return error;
865 }
866
867 static void __exit ps3vram_exit(void)
868 {
869 ps3_system_bus_driver_unregister(&ps3vram);
870 unregister_blkdev(ps3vram_major, DEVICE_NAME);
871 }
872
873 module_init(ps3vram_init);
874 module_exit(ps3vram_exit);
875
876 MODULE_LICENSE("GPL");
877 MODULE_DESCRIPTION("PS3 Video RAM Storage Driver");
878 MODULE_AUTHOR("Sony Corporation");
879 MODULE_ALIAS(PS3_MODULE_ALIAS_GPU_RAMDISK);
Linux with added FPC-III support