include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit...
[linux-2.6.git] / drivers / block / ps3vram.c
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);