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);