1fb6c3135fc8db04f278dc0d45809fc0ad10181d
[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
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);