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Linux 2.6.33.13
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / block / ps3vram.c
blob1fb6c3135fc8db04f278dc0d45809fc0ad10181d
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
16 #include <asm/cell-regs.h>
17 #include <asm/firmware.h>
18 #include <asm/lv1call.h>
19 #include <asm/ps3.h>
20 #include <asm/ps3gpu.h>
21
22
23 #define DEVICE_NAME "ps3vram"
24
25
26 #define XDR_BUF_SIZE (2 * 1024 * 1024) /* XDR buffer (must be 1MiB aligned) */
27 #define XDR_IOIF 0x0c000000
28
29 #define FIFO_BASE XDR_IOIF
30 #define FIFO_SIZE (64 * 1024)
31
32 #define DMA_PAGE_SIZE (4 * 1024)
33
34 #define CACHE_PAGE_SIZE (256 * 1024)
35 #define CACHE_PAGE_COUNT ((XDR_BUF_SIZE - FIFO_SIZE) / CACHE_PAGE_SIZE)
36
37 #define CACHE_OFFSET CACHE_PAGE_SIZE
38 #define FIFO_OFFSET 0
39
40 #define CTRL_PUT 0x10
41 #define CTRL_GET 0x11
42 #define CTRL_TOP 0x15
43
44 #define UPLOAD_SUBCH 1
45 #define DOWNLOAD_SUBCH 2
46
47 #define NV_MEMORY_TO_MEMORY_FORMAT_OFFSET_IN 0x0000030c
48 #define NV_MEMORY_TO_MEMORY_FORMAT_NOTIFY 0x00000104
49
50 #define CACHE_PAGE_PRESENT 1
51 #define CACHE_PAGE_DIRTY 2
52
53 struct ps3vram_tag {
54 unsigned int address;
55 unsigned int flags;
56 };
57
58 struct ps3vram_cache {
59 unsigned int page_count;
60 unsigned int page_size;
61 struct ps3vram_tag *tags;
62 unsigned int hit;
63 unsigned int miss;
64 };
65
66 struct ps3vram_priv {
67 struct request_queue *queue;
68 struct gendisk *gendisk;
69
70 u64 size;
71
72 u64 memory_handle;
73 u64 context_handle;
74 u32 *ctrl;
75 void *reports;
76 u8 *xdr_buf;
77
78 u32 *fifo_base;
79 u32 *fifo_ptr;
80
81 struct ps3vram_cache cache;
82
83 spinlock_t lock; /* protecting list of bios */
84 struct bio_list list;
85 };
86
87
88 static int ps3vram_major;
89
90
91 static const struct block_device_operations ps3vram_fops = {
92 .owner = THIS_MODULE,
93 };
94
95
96 #define DMA_NOTIFIER_HANDLE_BASE 0x66604200 /* first DMA notifier handle */
97 #define DMA_NOTIFIER_OFFSET_BASE 0x1000 /* first DMA notifier offset */
98 #define DMA_NOTIFIER_SIZE 0x40
99 #define NOTIFIER 7 /* notifier used for completion report */
100
101 static char *size = "256M";
102 module_param(size, charp, 0);
103 MODULE_PARM_DESC(size, "memory size");
104
105 static u32 *ps3vram_get_notifier(void *reports, int notifier)
106 {
107 return reports + DMA_NOTIFIER_OFFSET_BASE +
108 DMA_NOTIFIER_SIZE * notifier;
109 }
110
111 static void ps3vram_notifier_reset(struct ps3_system_bus_device *dev)
112 {
113 struct ps3vram_priv *priv = ps3_system_bus_get_drvdata(dev);
114 u32 *notify = ps3vram_get_notifier(priv->reports, NOTIFIER);
115 int i;
116
117 for (i = 0; i < 4; i++)
118 notify[i] = 0xffffffff;
119 }
120
121 static int ps3vram_notifier_wait(struct ps3_system_bus_device *dev,
122 unsigned int timeout_ms)
123 {
124 struct ps3vram_priv *priv = ps3_system_bus_get_drvdata(dev);
125 u32 *notify = ps3vram_get_notifier(priv->reports, NOTIFIER);
126 unsigned long timeout;
127
128 for (timeout = 20; timeout; timeout--) {
129 if (!notify[3])
130 return 0;
131 udelay(10);
132 }
133
134 timeout = jiffies + msecs_to_jiffies(timeout_ms);
135
136 do {
137 if (!notify[3])
138 return 0;
139 msleep(1);
140 } while (time_before(jiffies, timeout));
141
142 return -ETIMEDOUT;
143 }
144
145 static void ps3vram_init_ring(struct ps3_system_bus_device *dev)
146 {
147 struct ps3vram_priv *priv = ps3_system_bus_get_drvdata(dev);
148
149 priv->ctrl[CTRL_PUT] = FIFO_BASE + FIFO_OFFSET;
150 priv->ctrl[CTRL_GET] = FIFO_BASE + FIFO_OFFSET;
151 }
152
153 static int ps3vram_wait_ring(struct ps3_system_bus_device *dev,
154 unsigned int timeout_ms)
155 {
156 struct ps3vram_priv *priv = ps3_system_bus_get_drvdata(dev);
157 unsigned long timeout = jiffies + msecs_to_jiffies(timeout_ms);
158
159 do {
160 if (priv->ctrl[CTRL_PUT] == priv->ctrl[CTRL_GET])
161 return 0;
162 msleep(1);
163 } while (time_before(jiffies, timeout));
164
165 dev_warn(&dev->core, "FIFO timeout (%08x/%08x/%08x)\n",
166 priv->ctrl[CTRL_PUT], priv->ctrl[CTRL_GET],
167 priv->ctrl[CTRL_TOP]);
168
169 return -ETIMEDOUT;
170 }
171
172 static void ps3vram_out_ring(struct ps3vram_priv *priv, u32 data)
173 {
174 *(priv->fifo_ptr)++ = data;
175 }
176
177 static void ps3vram_begin_ring(struct ps3vram_priv *priv, u32 chan, u32 tag,
178 u32 size)
179 {
180 ps3vram_out_ring(priv, (size << 18) | (chan << 13) | tag);
181 }
182
183 static void ps3vram_rewind_ring(struct ps3_system_bus_device *dev)
184 {
185 struct ps3vram_priv *priv = ps3_system_bus_get_drvdata(dev);
186 int status;
187
188 ps3vram_out_ring(priv, 0x20000000 | (FIFO_BASE + FIFO_OFFSET));
189
190 priv->ctrl[CTRL_PUT] = FIFO_BASE + FIFO_OFFSET;
191
192 /* asking the HV for a blit will kick the FIFO */
193 status = lv1_gpu_fb_blit(priv->context_handle, 0, 0, 0, 0);
194 if (status)
195 dev_err(&dev->core, "%s: lv1_gpu_fb_blit failed %d\n",
196 __func__, status);
197
198 priv->fifo_ptr = priv->fifo_base;
199 }
200
201 static void ps3vram_fire_ring(struct ps3_system_bus_device *dev)
202 {
203 struct ps3vram_priv *priv = ps3_system_bus_get_drvdata(dev);
204 int status;
205
206 mutex_lock(&ps3_gpu_mutex);
207
208 priv->ctrl[CTRL_PUT] = FIFO_BASE + FIFO_OFFSET +
209 (priv->fifo_ptr - priv->fifo_base) * sizeof(u32);
210
211 /* asking the HV for a blit will kick the FIFO */
212 status = lv1_gpu_fb_blit(priv->context_handle, 0, 0, 0, 0);
213 if (status)
214 dev_err(&dev->core, "%s: lv1_gpu_fb_blit failed %d\n",
215 __func__, status);
216
217 if ((priv->fifo_ptr - priv->fifo_base) * sizeof(u32) >
218 FIFO_SIZE - 1024) {
219 dev_dbg(&dev->core, "FIFO full, rewinding\n");
220 ps3vram_wait_ring(dev, 200);
221 ps3vram_rewind_ring(dev);
222 }
223
224 mutex_unlock(&ps3_gpu_mutex);
225 }
226
227 static void ps3vram_bind(struct ps3_system_bus_device *dev)
228 {
229 struct ps3vram_priv *priv = ps3_system_bus_get_drvdata(dev);
230
231 ps3vram_begin_ring(priv, UPLOAD_SUBCH, 0, 1);
232 ps3vram_out_ring(priv, 0x31337303);
233 ps3vram_begin_ring(priv, UPLOAD_SUBCH, 0x180, 3);
234 ps3vram_out_ring(priv, DMA_NOTIFIER_HANDLE_BASE + NOTIFIER);
235 ps3vram_out_ring(priv, 0xfeed0001); /* DMA system RAM instance */
236 ps3vram_out_ring(priv, 0xfeed0000); /* DMA video RAM instance */
237
238 ps3vram_begin_ring(priv, DOWNLOAD_SUBCH, 0, 1);
239 ps3vram_out_ring(priv, 0x3137c0de);
240 ps3vram_begin_ring(priv, DOWNLOAD_SUBCH, 0x180, 3);
241 ps3vram_out_ring(priv, DMA_NOTIFIER_HANDLE_BASE + NOTIFIER);
242 ps3vram_out_ring(priv, 0xfeed0000); /* DMA video RAM instance */
243 ps3vram_out_ring(priv, 0xfeed0001); /* DMA system RAM instance */
244
245 ps3vram_fire_ring(dev);
246 }
247
248 static int ps3vram_upload(struct ps3_system_bus_device *dev,
249 unsigned int src_offset, unsigned int dst_offset,
250 int len, int count)
251 {
252 struct ps3vram_priv *priv = ps3_system_bus_get_drvdata(dev);
253
254 ps3vram_begin_ring(priv, UPLOAD_SUBCH,
255 NV_MEMORY_TO_MEMORY_FORMAT_OFFSET_IN, 8);
256 ps3vram_out_ring(priv, XDR_IOIF + src_offset);
257 ps3vram_out_ring(priv, dst_offset);
258 ps3vram_out_ring(priv, len);
259 ps3vram_out_ring(priv, len);
260 ps3vram_out_ring(priv, len);
261 ps3vram_out_ring(priv, count);
262 ps3vram_out_ring(priv, (1 << 8) | 1);
263 ps3vram_out_ring(priv, 0);
264
265 ps3vram_notifier_reset(dev);
266 ps3vram_begin_ring(priv, UPLOAD_SUBCH,
267 NV_MEMORY_TO_MEMORY_FORMAT_NOTIFY, 1);
268 ps3vram_out_ring(priv, 0);
269 ps3vram_begin_ring(priv, UPLOAD_SUBCH, 0x100, 1);
270 ps3vram_out_ring(priv, 0);
271 ps3vram_fire_ring(dev);
272 if (ps3vram_notifier_wait(dev, 200) < 0) {
273 dev_warn(&dev->core, "%s: Notifier timeout\n", __func__);
274 return -1;
275 }
276
277 return 0;
278 }
279
280 static int ps3vram_download(struct ps3_system_bus_device *dev,
281 unsigned int src_offset, unsigned int dst_offset,
282 int len, int count)
283 {
284 struct ps3vram_priv *priv = ps3_system_bus_get_drvdata(dev);
285
286 ps3vram_begin_ring(priv, DOWNLOAD_SUBCH,
287 NV_MEMORY_TO_MEMORY_FORMAT_OFFSET_IN, 8);
288 ps3vram_out_ring(priv, src_offset);
289 ps3vram_out_ring(priv, XDR_IOIF + dst_offset);
290 ps3vram_out_ring(priv, len);
291 ps3vram_out_ring(priv, len);
292 ps3vram_out_ring(priv, len);
293 ps3vram_out_ring(priv, count);
294 ps3vram_out_ring(priv, (1 << 8) | 1);
295 ps3vram_out_ring(priv, 0);
296
297 ps3vram_notifier_reset(dev);
298 ps3vram_begin_ring(priv, DOWNLOAD_SUBCH,
299 NV_MEMORY_TO_MEMORY_FORMAT_NOTIFY, 1);
300 ps3vram_out_ring(priv, 0);
301 ps3vram_begin_ring(priv, DOWNLOAD_SUBCH, 0x100, 1);
302 ps3vram_out_ring(priv, 0);
303 ps3vram_fire_ring(dev);
304 if (ps3vram_notifier_wait(dev, 200) < 0) {
305 dev_warn(&dev->core, "%s: Notifier timeout\n", __func__);
306 return -1;
307 }
308
309 return 0;
310 }
311
312 static void ps3vram_cache_evict(struct ps3_system_bus_device *dev, int entry)
313 {
314 struct ps3vram_priv *priv = ps3_system_bus_get_drvdata(dev);
315 struct ps3vram_cache *cache = &priv->cache;
316
317 if (!(cache->tags[entry].flags & CACHE_PAGE_DIRTY))
318 return;
319
320 dev_dbg(&dev->core, "Flushing %d: 0x%08x\n", entry,
321 cache->tags[entry].address);
322 if (ps3vram_upload(dev, CACHE_OFFSET + entry * cache->page_size,
323 cache->tags[entry].address, DMA_PAGE_SIZE,
324 cache->page_size / DMA_PAGE_SIZE) < 0) {
325 dev_err(&dev->core,
326 "Failed to upload from 0x%x to " "0x%x size 0x%x\n",
327 entry * cache->page_size, cache->tags[entry].address,
328 cache->page_size);
329 }
330 cache->tags[entry].flags &= ~CACHE_PAGE_DIRTY;
331 }
332
333 static void ps3vram_cache_load(struct ps3_system_bus_device *dev, int entry,
334 unsigned int address)
335 {
336 struct ps3vram_priv *priv = ps3_system_bus_get_drvdata(dev);
337 struct ps3vram_cache *cache = &priv->cache;
338
339 dev_dbg(&dev->core, "Fetching %d: 0x%08x\n", entry, address);
340 if (ps3vram_download(dev, address,
341 CACHE_OFFSET + entry * cache->page_size,
342 DMA_PAGE_SIZE,
343 cache->page_size / DMA_PAGE_SIZE) < 0) {
344 dev_err(&dev->core,
345 "Failed to download from 0x%x to 0x%x size 0x%x\n",
346 address, entry * cache->page_size, cache->page_size);
347 }
348
349 cache->tags[entry].address = address;
350 cache->tags[entry].flags |= CACHE_PAGE_PRESENT;
351 }
352
353
354 static void ps3vram_cache_flush(struct ps3_system_bus_device *dev)
355 {
356 struct ps3vram_priv *priv = ps3_system_bus_get_drvdata(dev);
357 struct ps3vram_cache *cache = &priv->cache;
358 int i;
359
360 dev_dbg(&dev->core, "FLUSH\n");
361 for (i = 0; i < cache->page_count; i++) {
362 ps3vram_cache_evict(dev, i);
363 cache->tags[i].flags = 0;
364 }
365 }
366
367 static unsigned int ps3vram_cache_match(struct ps3_system_bus_device *dev,
368 loff_t address)
369 {
370 struct ps3vram_priv *priv = ps3_system_bus_get_drvdata(dev);
371 struct ps3vram_cache *cache = &priv->cache;
372 unsigned int base;
373 unsigned int offset;
374 int i;
375 static int counter;
376
377 offset = (unsigned int) (address & (cache->page_size - 1));
378 base = (unsigned int) (address - offset);
379
380 /* fully associative check */
381 for (i = 0; i < cache->page_count; i++) {
382 if ((cache->tags[i].flags & CACHE_PAGE_PRESENT) &&
383 cache->tags[i].address == base) {
384 cache->hit++;
385 dev_dbg(&dev->core, "Found entry %d: 0x%08x\n", i,
386 cache->tags[i].address);
387 return i;
388 }
389 }
390
391 /* choose a random entry */
392 i = (jiffies + (counter++)) % cache->page_count;
393 dev_dbg(&dev->core, "Using entry %d\n", i);
394
395 ps3vram_cache_evict(dev, i);
396 ps3vram_cache_load(dev, i, base);
397
398 cache->miss++;
399 return i;
400 }
401
402 static int ps3vram_cache_init(struct ps3_system_bus_device *dev)
403 {
404 struct ps3vram_priv *priv = ps3_system_bus_get_drvdata(dev);
405
406 priv->cache.page_count = CACHE_PAGE_COUNT;
407 priv->cache.page_size = CACHE_PAGE_SIZE;
408 priv->cache.tags = kzalloc(sizeof(struct ps3vram_tag) *
409 CACHE_PAGE_COUNT, GFP_KERNEL);
410 if (priv->cache.tags == NULL) {
411 dev_err(&dev->core, "Could not allocate cache tags\n");
412 return -ENOMEM;
413 }
414
415 dev_info(&dev->core, "Created ram cache: %d entries, %d KiB each\n",
416 CACHE_PAGE_COUNT, CACHE_PAGE_SIZE / 1024);
417
418 return 0;
419 }
420
421 static void ps3vram_cache_cleanup(struct ps3_system_bus_device *dev)
422 {
423 struct ps3vram_priv *priv = ps3_system_bus_get_drvdata(dev);
424
425 ps3vram_cache_flush(dev);
426 kfree(priv->cache.tags);
427 }
428
429 static int ps3vram_read(struct ps3_system_bus_device *dev, loff_t from,
430 size_t len, size_t *retlen, u_char *buf)
431 {
432 struct ps3vram_priv *priv = ps3_system_bus_get_drvdata(dev);
433 unsigned int cached, count;
434
435 dev_dbg(&dev->core, "%s: from=0x%08x len=0x%zx\n", __func__,
436 (unsigned int)from, len);
437
438 if (from >= priv->size)
439 return -EIO;
440
441 if (len > priv->size - from)
442 len = priv->size - from;
443
444 /* Copy from vram to buf */
445 count = len;
446 while (count) {
447 unsigned int offset, avail;
448 unsigned int entry;
449
450 offset = (unsigned int) (from & (priv->cache.page_size - 1));
451 avail = priv->cache.page_size - offset;
452
453 entry = ps3vram_cache_match(dev, from);
454 cached = CACHE_OFFSET + entry * priv->cache.page_size + offset;
455
456 dev_dbg(&dev->core, "%s: from=%08x cached=%08x offset=%08x "
457 "avail=%08x count=%08x\n", __func__,
458 (unsigned int)from, cached, offset, avail, count);
459
460 if (avail > count)
461 avail = count;
462 memcpy(buf, priv->xdr_buf + cached, avail);
463
464 buf += avail;
465 count -= avail;
466 from += avail;
467 }
468
469 *retlen = len;
470 return 0;
471 }
472
473 static int ps3vram_write(struct ps3_system_bus_device *dev, loff_t to,
474 size_t len, size_t *retlen, const u_char *buf)
475 {
476 struct ps3vram_priv *priv = ps3_system_bus_get_drvdata(dev);
477 unsigned int cached, count;
478
479 if (to >= priv->size)
480 return -EIO;
481
482 if (len > priv->size - to)
483 len = priv->size - to;
484
485 /* Copy from buf to vram */
486 count = len;
487 while (count) {
488 unsigned int offset, avail;
489 unsigned int entry;
490
491 offset = (unsigned int) (to & (priv->cache.page_size - 1));
492 avail = priv->cache.page_size - offset;
493
494 entry = ps3vram_cache_match(dev, to);
495 cached = CACHE_OFFSET + entry * priv->cache.page_size + offset;
496
497 dev_dbg(&dev->core, "%s: to=%08x cached=%08x offset=%08x "
498 "avail=%08x count=%08x\n", __func__, (unsigned int)to,
499 cached, offset, avail, count);
500
501 if (avail > count)
502 avail = count;
503 memcpy(priv->xdr_buf + cached, buf, avail);
504
505 priv->cache.tags[entry].flags |= CACHE_PAGE_DIRTY;
506
507 buf += avail;
508 count -= avail;
509 to += avail;
510 }
511
512 *retlen = len;
513 return 0;
514 }
515
516 static int ps3vram_proc_show(struct seq_file *m, void *v)
517 {
518 struct ps3vram_priv *priv = m->private;
519
520 seq_printf(m, "hit:%u\nmiss:%u\n", priv->cache.hit, priv->cache.miss);
521 return 0;
522 }
523
524 static int ps3vram_proc_open(struct inode *inode, struct file *file)
525 {
526 return single_open(file, ps3vram_proc_show, PDE(inode)->data);
527 }
528
529 static const struct file_operations ps3vram_proc_fops = {
530 .owner = THIS_MODULE,
531 .open = ps3vram_proc_open,
532 .read = seq_read,
533 .llseek = seq_lseek,
534 .release = single_release,
535 };
536
537 static void __devinit ps3vram_proc_init(struct ps3_system_bus_device *dev)
538 {
539 struct ps3vram_priv *priv = ps3_system_bus_get_drvdata(dev);
540 struct proc_dir_entry *pde;
541
542 pde = proc_create_data(DEVICE_NAME, 0444, NULL, &ps3vram_proc_fops,
543 priv);
544 if (!pde)
545 dev_warn(&dev->core, "failed to create /proc entry\n");
546 }
547
548 static struct bio *ps3vram_do_bio(struct ps3_system_bus_device *dev,
549 struct bio *bio)
550 {
551 struct ps3vram_priv *priv = ps3_system_bus_get_drvdata(dev);
552 int write = bio_data_dir(bio) == WRITE;
553 const char *op = write ? "write" : "read";
554 loff_t offset = bio->bi_sector << 9;
555 int error = 0;
556 struct bio_vec *bvec;
557 unsigned int i;
558 struct bio *next;
559
560 bio_for_each_segment(bvec, bio, i) {
561 /* PS3 is ppc64, so we don't handle highmem */
562 char *ptr = page_address(bvec->bv_page) + bvec->bv_offset;
563 size_t len = bvec->bv_len, retlen;
564
565 dev_dbg(&dev->core, " %s %zu bytes at offset %llu\n", op,
566 len, offset);
567 if (write)
568 error = ps3vram_write(dev, offset, len, &retlen, ptr);
569 else
570 error = ps3vram_read(dev, offset, len, &retlen, ptr);
571
572 if (error) {
573 dev_err(&dev->core, "%s failed\n", op);
574 goto out;
575 }
576
577 if (retlen != len) {
578 dev_err(&dev->core, "Short %s\n", op);
579 error = -EIO;
580 goto out;
581 }
582
583 offset += len;
584 }
585
586 dev_dbg(&dev->core, "%s completed\n", op);
587
588 out:
589 spin_lock_irq(&priv->lock);
590 bio_list_pop(&priv->list);
591 next = bio_list_peek(&priv->list);
592 spin_unlock_irq(&priv->lock);
593
594 bio_endio(bio, error);
595 return next;
596 }
597
598 static int ps3vram_make_request(struct request_queue *q, struct bio *bio)
599 {
600 struct ps3_system_bus_device *dev = q->queuedata;
601 struct ps3vram_priv *priv = ps3_system_bus_get_drvdata(dev);
602 int busy;
603
604 dev_dbg(&dev->core, "%s\n", __func__);
605
606 spin_lock_irq(&priv->lock);
607 busy = !bio_list_empty(&priv->list);
608 bio_list_add(&priv->list, bio);
609 spin_unlock_irq(&priv->lock);
610
611 if (busy)
612 return 0;
613
614 do {
615 bio = ps3vram_do_bio(dev, bio);
616 } while (bio);
617
618 return 0;
619 }
620
621 static int __devinit 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_phys_segments(queue, MAX_PHYS_SEGMENTS);
755 blk_queue_max_hw_segments(queue, MAX_HW_SEGMENTS);
756 blk_queue_max_segment_size(queue, MAX_SEGMENT_SIZE);
757 blk_queue_max_sectors(queue, 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 2.6 ibm-acpi/thinkpad-acpi driver git tree