git.oblomov.eu Git - linux-2.6/blob - 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/firmware.h>
  17 #include <asm/iommu.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 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_driver_data(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_driver_data(dev);
 125         u32 *notify = ps3vram_get_notifier(priv->reports, NOTIFIER);
 126         unsigned long timeout = jiffies + msecs_to_jiffies(timeout_ms);
 127
 128         do {
 129                 if (!notify[3])
 130                         return 0;
 131                 msleep(1);
 132         } while (time_before(jiffies, timeout));
 133
 134         return -ETIMEDOUT;
 135 }
 136
 137 static void ps3vram_init_ring(struct ps3_system_bus_device *dev)
 138 {
 139         struct ps3vram_priv *priv = ps3_system_bus_get_driver_data(dev);
 140
 141         priv->ctrl[CTRL_PUT] = FIFO_BASE + FIFO_OFFSET;
 142         priv->ctrl[CTRL_GET] = FIFO_BASE + FIFO_OFFSET;
 143 }
 144
 145 static int ps3vram_wait_ring(struct ps3_system_bus_device *dev,
 146                              unsigned int timeout_ms)
 147 {
 148         struct ps3vram_priv *priv = ps3_system_bus_get_driver_data(dev);
 149         unsigned long timeout = jiffies + msecs_to_jiffies(timeout_ms);
 150
 151         do {
 152                 if (priv->ctrl[CTRL_PUT] == priv->ctrl[CTRL_GET])
 153                         return 0;
 154                 msleep(1);
 155         } while (time_before(jiffies, timeout));
 156
 157         dev_warn(&dev->core, "FIFO timeout (%08x/%08x/%08x)\n",
 158                  priv->ctrl[CTRL_PUT], priv->ctrl[CTRL_GET],
 159                  priv->ctrl[CTRL_TOP]);
 160
 161         return -ETIMEDOUT;
 162 }
 163
 164 static void ps3vram_out_ring(struct ps3vram_priv *priv, u32 data)
 165 {
 166         *(priv->fifo_ptr)++ = data;
 167 }
 168
 169 static void ps3vram_begin_ring(struct ps3vram_priv *priv, u32 chan, u32 tag,
 170                                u32 size)
 171 {
 172         ps3vram_out_ring(priv, (size << 18) | (chan << 13) | tag);
 173 }
 174
 175 static void ps3vram_rewind_ring(struct ps3_system_bus_device *dev)
 176 {
 177         struct ps3vram_priv *priv = ps3_system_bus_get_driver_data(dev);
 178         int status;
 179
 180         ps3vram_out_ring(priv, 0x20000000 | (FIFO_BASE + FIFO_OFFSET));
 181
 182         priv->ctrl[CTRL_PUT] = FIFO_BASE + FIFO_OFFSET;
 183
 184         /* asking the HV for a blit will kick the FIFO */
 185         status = lv1_gpu_fb_blit(priv->context_handle, 0, 0, 0, 0);
 186         if (status)
 187                 dev_err(&dev->core, "%s: lv1_gpu_fb_blit failed %d\n",
 188                         __func__, status);
 189
 190         priv->fifo_ptr = priv->fifo_base;
 191 }
 192
 193 static void ps3vram_fire_ring(struct ps3_system_bus_device *dev)
 194 {
 195         struct ps3vram_priv *priv = ps3_system_bus_get_driver_data(dev);
 196         int status;
 197
 198         mutex_lock(&ps3_gpu_mutex);
 199
 200         priv->ctrl[CTRL_PUT] = FIFO_BASE + FIFO_OFFSET +
 201                                (priv->fifo_ptr - priv->fifo_base) * sizeof(u32);
 202
 203         /* asking the HV for a blit will kick the FIFO */
 204         status = lv1_gpu_fb_blit(priv->context_handle, 0, 0, 0, 0);
 205         if (status)
 206                 dev_err(&dev->core, "%s: lv1_gpu_fb_blit failed %d\n",
 207                         __func__, status);
 208
 209         if ((priv->fifo_ptr - priv->fifo_base) * sizeof(u32) >
 210             FIFO_SIZE - 1024) {
 211                 dev_dbg(&dev->core, "FIFO full, rewinding\n");
 212                 ps3vram_wait_ring(dev, 200);
 213                 ps3vram_rewind_ring(dev);
 214         }
 215
 216         mutex_unlock(&ps3_gpu_mutex);
 217 }
 218
 219 static void ps3vram_bind(struct ps3_system_bus_device *dev)
 220 {
 221         struct ps3vram_priv *priv = ps3_system_bus_get_driver_data(dev);
 222
 223         ps3vram_begin_ring(priv, UPLOAD_SUBCH, 0, 1);
 224         ps3vram_out_ring(priv, 0x31337303);
 225         ps3vram_begin_ring(priv, UPLOAD_SUBCH, 0x180, 3);
 226         ps3vram_out_ring(priv, DMA_NOTIFIER_HANDLE_BASE + NOTIFIER);
 227         ps3vram_out_ring(priv, 0xfeed0001);     /* DMA system RAM instance */
 228         ps3vram_out_ring(priv, 0xfeed0000);     /* DMA video RAM instance */
 229
 230         ps3vram_begin_ring(priv, DOWNLOAD_SUBCH, 0, 1);
 231         ps3vram_out_ring(priv, 0x3137c0de);
 232         ps3vram_begin_ring(priv, DOWNLOAD_SUBCH, 0x180, 3);
 233         ps3vram_out_ring(priv, DMA_NOTIFIER_HANDLE_BASE + NOTIFIER);
 234         ps3vram_out_ring(priv, 0xfeed0000);     /* DMA video RAM instance */
 235         ps3vram_out_ring(priv, 0xfeed0001);     /* DMA system RAM instance */
 236
 237         ps3vram_fire_ring(dev);
 238 }
 239
 240 static int ps3vram_upload(struct ps3_system_bus_device *dev,
 241                           unsigned int src_offset, unsigned int dst_offset,
 242                           int len, int count)
 243 {
 244         struct ps3vram_priv *priv = ps3_system_bus_get_driver_data(dev);
 245
 246         ps3vram_begin_ring(priv, UPLOAD_SUBCH,
 247                            NV_MEMORY_TO_MEMORY_FORMAT_OFFSET_IN, 8);
 248         ps3vram_out_ring(priv, XDR_IOIF + src_offset);
 249         ps3vram_out_ring(priv, dst_offset);
 250         ps3vram_out_ring(priv, len);
 251         ps3vram_out_ring(priv, len);
 252         ps3vram_out_ring(priv, len);
 253         ps3vram_out_ring(priv, count);
 254         ps3vram_out_ring(priv, (1 << 8) | 1);
 255         ps3vram_out_ring(priv, 0);
 256
 257         ps3vram_notifier_reset(dev);
 258         ps3vram_begin_ring(priv, UPLOAD_SUBCH,
 259                            NV_MEMORY_TO_MEMORY_FORMAT_NOTIFY, 1);
 260         ps3vram_out_ring(priv, 0);
 261         ps3vram_begin_ring(priv, UPLOAD_SUBCH, 0x100, 1);
 262         ps3vram_out_ring(priv, 0);
 263         ps3vram_fire_ring(dev);
 264         if (ps3vram_notifier_wait(dev, 200) < 0) {
 265                 dev_warn(&dev->core, "%s: Notifier timeout\n", __func__);
 266                 return -1;
 267         }
 268
 269         return 0;
 270 }
 271
 272 static int ps3vram_download(struct ps3_system_bus_device *dev,
 273                             unsigned int src_offset, unsigned int dst_offset,
 274                             int len, int count)
 275 {
 276         struct ps3vram_priv *priv = ps3_system_bus_get_driver_data(dev);
 277
 278         ps3vram_begin_ring(priv, DOWNLOAD_SUBCH,
 279                            NV_MEMORY_TO_MEMORY_FORMAT_OFFSET_IN, 8);
 280         ps3vram_out_ring(priv, src_offset);
 281         ps3vram_out_ring(priv, XDR_IOIF + dst_offset);
 282         ps3vram_out_ring(priv, len);
 283         ps3vram_out_ring(priv, len);
 284         ps3vram_out_ring(priv, len);
 285         ps3vram_out_ring(priv, count);
 286         ps3vram_out_ring(priv, (1 << 8) | 1);
 287         ps3vram_out_ring(priv, 0);
 288
 289         ps3vram_notifier_reset(dev);
 290         ps3vram_begin_ring(priv, DOWNLOAD_SUBCH,
 291                            NV_MEMORY_TO_MEMORY_FORMAT_NOTIFY, 1);
 292         ps3vram_out_ring(priv, 0);
 293         ps3vram_begin_ring(priv, DOWNLOAD_SUBCH, 0x100, 1);
 294         ps3vram_out_ring(priv, 0);
 295         ps3vram_fire_ring(dev);
 296         if (ps3vram_notifier_wait(dev, 200) < 0) {
 297                 dev_warn(&dev->core, "%s: Notifier timeout\n", __func__);
 298                 return -1;
 299         }
 300
 301         return 0;
 302 }
 303
 304 static void ps3vram_cache_evict(struct ps3_system_bus_device *dev, int entry)
 305 {
 306         struct ps3vram_priv *priv = ps3_system_bus_get_driver_data(dev);
 307         struct ps3vram_cache *cache = &priv->cache;
 308
 309         if (!(cache->tags[entry].flags & CACHE_PAGE_DIRTY))
 310                 return;
 311
 312         dev_dbg(&dev->core, "Flushing %d: 0x%08x\n", entry,
 313                 cache->tags[entry].address);
 314         if (ps3vram_upload(dev, CACHE_OFFSET + entry * cache->page_size,
 315                            cache->tags[entry].address, DMA_PAGE_SIZE,
 316                            cache->page_size / DMA_PAGE_SIZE) < 0) {
 317                 dev_err(&dev->core,
 318                         "Failed to upload from 0x%x to " "0x%x size 0x%x\n",
 319                         entry * cache->page_size, cache->tags[entry].address,
 320                         cache->page_size);
 321         }
 322         cache->tags[entry].flags &= ~CACHE_PAGE_DIRTY;
 323 }
 324
 325 static void ps3vram_cache_load(struct ps3_system_bus_device *dev, int entry,
 326                                unsigned int address)
 327 {
 328         struct ps3vram_priv *priv = ps3_system_bus_get_driver_data(dev);
 329         struct ps3vram_cache *cache = &priv->cache;
 330
 331         dev_dbg(&dev->core, "Fetching %d: 0x%08x\n", entry, address);
 332         if (ps3vram_download(dev, address,
 333                              CACHE_OFFSET + entry * cache->page_size,
 334                              DMA_PAGE_SIZE,
 335                              cache->page_size / DMA_PAGE_SIZE) < 0) {
 336                 dev_err(&dev->core,
 337                         "Failed to download from 0x%x to 0x%x size 0x%x\n",
 338                         address, entry * cache->page_size, cache->page_size);
 339         }
 340
 341         cache->tags[entry].address = address;
 342         cache->tags[entry].flags |= CACHE_PAGE_PRESENT;
 343 }
 344
 345
 346 static void ps3vram_cache_flush(struct ps3_system_bus_device *dev)
 347 {
 348         struct ps3vram_priv *priv = ps3_system_bus_get_driver_data(dev);
 349         struct ps3vram_cache *cache = &priv->cache;
 350         int i;
 351
 352         dev_dbg(&dev->core, "FLUSH\n");
 353         for (i = 0; i < cache->page_count; i++) {
 354                 ps3vram_cache_evict(dev, i);
 355                 cache->tags[i].flags = 0;
 356         }
 357 }
 358
 359 static unsigned int ps3vram_cache_match(struct ps3_system_bus_device *dev,
 360                                         loff_t address)
 361 {
 362         struct ps3vram_priv *priv = ps3_system_bus_get_driver_data(dev);
 363         struct ps3vram_cache *cache = &priv->cache;
 364         unsigned int base;
 365         unsigned int offset;
 366         int i;
 367         static int counter;
 368
 369         offset = (unsigned int) (address & (cache->page_size - 1));
 370         base = (unsigned int) (address - offset);
 371
 372         /* fully associative check */
 373         for (i = 0; i < cache->page_count; i++) {
 374                 if ((cache->tags[i].flags & CACHE_PAGE_PRESENT) &&
 375                     cache->tags[i].address == base) {
 376                         cache->hit++;
 377                         dev_dbg(&dev->core, "Found entry %d: 0x%08x\n", i,
 378                                 cache->tags[i].address);
 379                         return i;
 380                 }
 381         }
 382
 383         /* choose a random entry */
 384         i = (jiffies + (counter++)) % cache->page_count;
 385         dev_dbg(&dev->core, "Using entry %d\n", i);
 386
 387         ps3vram_cache_evict(dev, i);
 388         ps3vram_cache_load(dev, i, base);
 389
 390         cache->miss++;
 391         return i;
 392 }
 393
 394 static int ps3vram_cache_init(struct ps3_system_bus_device *dev)
 395 {
 396         struct ps3vram_priv *priv = ps3_system_bus_get_driver_data(dev);
 397
 398         priv->cache.page_count = CACHE_PAGE_COUNT;
 399         priv->cache.page_size = CACHE_PAGE_SIZE;
 400         priv->cache.tags = kzalloc(sizeof(struct ps3vram_tag) *
 401                                    CACHE_PAGE_COUNT, GFP_KERNEL);
 402         if (priv->cache.tags == NULL) {
 403                 dev_err(&dev->core, "Could not allocate cache tags\n");
 404                 return -ENOMEM;
 405         }
 406
 407         dev_info(&dev->core, "Created ram cache: %d entries, %d KiB each\n",
 408                 CACHE_PAGE_COUNT, CACHE_PAGE_SIZE / 1024);
 409
 410         return 0;
 411 }
 412
 413 static void ps3vram_cache_cleanup(struct ps3_system_bus_device *dev)
 414 {
 415         struct ps3vram_priv *priv = ps3_system_bus_get_driver_data(dev);
 416
 417         ps3vram_cache_flush(dev);
 418         kfree(priv->cache.tags);
 419 }
 420
 421 static int ps3vram_read(struct ps3_system_bus_device *dev, loff_t from,
 422                         size_t len, size_t *retlen, u_char *buf)
 423 {
 424         struct ps3vram_priv *priv = ps3_system_bus_get_driver_data(dev);
 425         unsigned int cached, count;
 426
 427         dev_dbg(&dev->core, "%s: from=0x%08x len=0x%zx\n", __func__,
 428                 (unsigned int)from, len);
 429
 430         if (from >= priv->size)
 431                 return -EIO;
 432
 433         if (len > priv->size - from)
 434                 len = priv->size - from;
 435
 436         /* Copy from vram to buf */
 437         count = len;
 438         while (count) {
 439                 unsigned int offset, avail;
 440                 unsigned int entry;
 441
 442                 offset = (unsigned int) (from & (priv->cache.page_size - 1));
 443                 avail  = priv->cache.page_size - offset;
 444
 445                 entry = ps3vram_cache_match(dev, from);
 446                 cached = CACHE_OFFSET + entry * priv->cache.page_size + offset;
 447
 448                 dev_dbg(&dev->core, "%s: from=%08x cached=%08x offset=%08x "
 449                         "avail=%08x count=%08x\n", __func__,
 450                         (unsigned int)from, cached, offset, avail, count);
 451
 452                 if (avail > count)
 453                         avail = count;
 454                 memcpy(buf, priv->xdr_buf + cached, avail);
 455
 456                 buf += avail;
 457                 count -= avail;
 458                 from += avail;
 459         }
 460
 461         *retlen = len;
 462         return 0;
 463 }
 464
 465 static int ps3vram_write(struct ps3_system_bus_device *dev, loff_t to,
 466                          size_t len, size_t *retlen, const u_char *buf)
 467 {
 468         struct ps3vram_priv *priv = ps3_system_bus_get_driver_data(dev);
 469         unsigned int cached, count;
 470
 471         if (to >= priv->size)
 472                 return -EIO;
 473
 474         if (len > priv->size - to)
 475                 len = priv->size - to;
 476
 477         /* Copy from buf to vram */
 478         count = len;
 479         while (count) {
 480                 unsigned int offset, avail;
 481                 unsigned int entry;
 482
 483                 offset = (unsigned int) (to & (priv->cache.page_size - 1));
 484                 avail  = priv->cache.page_size - offset;
 485
 486                 entry = ps3vram_cache_match(dev, to);
 487                 cached = CACHE_OFFSET + entry * priv->cache.page_size + offset;
 488
 489                 dev_dbg(&dev->core, "%s: to=%08x cached=%08x offset=%08x "
 490                         "avail=%08x count=%08x\n", __func__, (unsigned int)to,
 491                         cached, offset, avail, count);
 492
 493                 if (avail > count)
 494                         avail = count;
 495                 memcpy(priv->xdr_buf + cached, buf, avail);
 496
 497                 priv->cache.tags[entry].flags |= CACHE_PAGE_DIRTY;
 498
 499                 buf += avail;
 500                 count -= avail;
 501                 to += avail;
 502         }
 503
 504         *retlen = len;
 505         return 0;
 506 }
 507
 508 static int ps3vram_proc_show(struct seq_file *m, void *v)
 509 {
 510         struct ps3vram_priv *priv = m->private;
 511
 512         seq_printf(m, "hit:%u\nmiss:%u\n", priv->cache.hit, priv->cache.miss);
 513         return 0;
 514 }
 515
 516 static int ps3vram_proc_open(struct inode *inode, struct file *file)
 517 {
 518         return single_open(file, ps3vram_proc_show, PDE(inode)->data);
 519 }
 520
 521 static const struct file_operations ps3vram_proc_fops = {
 522         .owner          = THIS_MODULE,
 523         .open           = ps3vram_proc_open,
 524         .read           = seq_read,
 525         .llseek         = seq_lseek,
 526         .release        = single_release,
 527 };
 528
 529 static void __devinit ps3vram_proc_init(struct ps3_system_bus_device *dev)
 530 {
 531         struct ps3vram_priv *priv = ps3_system_bus_get_driver_data(dev);
 532         struct proc_dir_entry *pde;
 533
 534         pde = proc_create_data(DEVICE_NAME, 0444, NULL, &ps3vram_proc_fops,
 535                                priv);
 536         if (!pde)
 537                 dev_warn(&dev->core, "failed to create /proc entry\n");
 538 }
 539
 540 static struct bio *ps3vram_do_bio(struct ps3_system_bus_device *dev,
 541                                   struct bio *bio)
 542 {
 543         struct ps3vram_priv *priv = ps3_system_bus_get_driver_data(dev);
 544         int write = bio_data_dir(bio) == WRITE;
 545         const char *op = write ? "write" : "read";
 546         loff_t offset = bio->bi_sector << 9;
 547         int error = 0;
 548         struct bio_vec *bvec;
 549         unsigned int i;
 550         struct bio *next;
 551
 552         bio_for_each_segment(bvec, bio, i) {
 553                 /* PS3 is ppc64, so we don't handle highmem */
 554                 char *ptr = page_address(bvec->bv_page) + bvec->bv_offset;
 555                 size_t len = bvec->bv_len, retlen;
 556
 557                 dev_dbg(&dev->core, "    %s %zu bytes at offset %llu\n", op,
 558                         len, offset);
 559                 if (write)
 560                         error = ps3vram_write(dev, offset, len, &retlen, ptr);
 561                 else
 562                         error = ps3vram_read(dev, offset, len, &retlen, ptr);
 563
 564                 if (error) {
 565                         dev_err(&dev->core, "%s failed\n", op);
 566                         goto out;
 567                 }
 568
 569                 if (retlen != len) {
 570                         dev_err(&dev->core, "Short %s\n", op);
 571                         error = -EIO;
 572                         goto out;
 573                 }
 574
 575                 offset += len;
 576         }
 577
 578         dev_dbg(&dev->core, "%s completed\n", op);
 579
 580 out:
 581         spin_lock_irq(&priv->lock);
 582         bio_list_pop(&priv->list);
 583         next = bio_list_peek(&priv->list);
 584         spin_unlock_irq(&priv->lock);
 585
 586         bio_endio(bio, error);
 587         return next;
 588 }
 589
 590 static int ps3vram_make_request(struct request_queue *q, struct bio *bio)
 591 {
 592         struct ps3_system_bus_device *dev = q->queuedata;
 593         struct ps3vram_priv *priv = ps3_system_bus_get_driver_data(dev);
 594         int busy;
 595
 596         dev_dbg(&dev->core, "%s\n", __func__);
 597
 598         spin_lock_irq(&priv->lock);
 599         busy = !bio_list_empty(&priv->list);
 600         bio_list_add(&priv->list, bio);
 601         spin_unlock_irq(&priv->lock);
 602
 603         if (busy)
 604                 return 0;
 605
 606         do {
 607                 bio = ps3vram_do_bio(dev, bio);
 608         } while (bio);
 609
 610         return 0;
 611 }
 612
 613 static int __devinit ps3vram_probe(struct ps3_system_bus_device *dev)
 614 {
 615         struct ps3vram_priv *priv;
 616         int error, status;
 617         struct request_queue *queue;
 618         struct gendisk *gendisk;
 619         u64 ddr_size, ddr_lpar, ctrl_lpar, info_lpar, reports_lpar,
 620             reports_size, xdr_lpar;
 621         char *rest;
 622
 623         priv = kzalloc(sizeof(*priv), GFP_KERNEL);
 624         if (!priv) {
 625                 error = -ENOMEM;
 626                 goto fail;
 627         }
 628
 629         spin_lock_init(&priv->lock);
 630         bio_list_init(&priv->list);
 631         ps3_system_bus_set_driver_data(dev, priv);
 632
 633         /* Allocate XDR buffer (1MiB aligned) */
 634         priv->xdr_buf = (void *)__get_free_pages(GFP_KERNEL,
 635                 get_order(XDR_BUF_SIZE));
 636         if (priv->xdr_buf == NULL) {
 637                 dev_err(&dev->core, "Could not allocate XDR buffer\n");
 638                 error = -ENOMEM;
 639                 goto fail_free_priv;
 640         }
 641
 642         /* Put FIFO at begginning of XDR buffer */
 643         priv->fifo_base = (u32 *) (priv->xdr_buf + FIFO_OFFSET);
 644         priv->fifo_ptr = priv->fifo_base;
 645
 646         /* XXX: Need to open GPU, in case ps3fb or snd_ps3 aren't loaded */
 647         if (ps3_open_hv_device(dev)) {
 648                 dev_err(&dev->core, "ps3_open_hv_device failed\n");
 649                 error = -EAGAIN;
 650                 goto out_free_xdr_buf;
 651         }
 652
 653         /* Request memory */
 654         status = -1;
 655         ddr_size = ALIGN(memparse(size, &rest), 1024*1024);
 656         if (!ddr_size) {
 657                 dev_err(&dev->core, "Specified size is too small\n");
 658                 error = -EINVAL;
 659                 goto out_close_gpu;
 660         }
 661
 662         while (ddr_size > 0) {
 663                 status = lv1_gpu_memory_allocate(ddr_size, 0, 0, 0, 0,
 664                                                  &priv->memory_handle,
 665                                                  &ddr_lpar);
 666                 if (!status)
 667                         break;
 668                 ddr_size -= 1024*1024;
 669         }
 670         if (status) {
 671                 dev_err(&dev->core, "lv1_gpu_memory_allocate failed %d\n",
 672                         status);
 673                 error = -ENOMEM;
 674                 goto out_close_gpu;
 675         }
 676
 677         /* Request context */
 678         status = lv1_gpu_context_allocate(priv->memory_handle, 0,
 679                                           &priv->context_handle, &ctrl_lpar,
 680                                           &info_lpar, &reports_lpar,
 681                                           &reports_size);
 682         if (status) {
 683                 dev_err(&dev->core, "lv1_gpu_context_allocate failed %d\n",
 684                         status);
 685                 error = -ENOMEM;
 686                 goto out_free_memory;
 687         }
 688
 689         /* Map XDR buffer to RSX */
 690         xdr_lpar = ps3_mm_phys_to_lpar(__pa(priv->xdr_buf));
 691         status = lv1_gpu_context_iomap(priv->context_handle, XDR_IOIF,
 692                                        xdr_lpar, XDR_BUF_SIZE,
 693                                        CBE_IOPTE_PP_W | CBE_IOPTE_PP_R |
 694                                        CBE_IOPTE_M);
 695         if (status) {
 696                 dev_err(&dev->core, "lv1_gpu_context_iomap failed %d\n",
 697                         status);
 698                 error = -ENOMEM;
 699                 goto out_free_context;
 700         }
 701
 702         priv->ctrl = ioremap(ctrl_lpar, 64 * 1024);
 703         if (!priv->ctrl) {
 704                 dev_err(&dev->core, "ioremap CTRL failed\n");
 705                 error = -ENOMEM;
 706                 goto out_unmap_context;
 707         }
 708
 709         priv->reports = ioremap(reports_lpar, reports_size);
 710         if (!priv->reports) {
 711                 dev_err(&dev->core, "ioremap REPORTS failed\n");
 712                 error = -ENOMEM;
 713                 goto out_unmap_ctrl;
 714         }
 715
 716         mutex_lock(&ps3_gpu_mutex);
 717         ps3vram_init_ring(dev);
 718         mutex_unlock(&ps3_gpu_mutex);
 719
 720         priv->size = ddr_size;
 721
 722         ps3vram_bind(dev);
 723
 724         mutex_lock(&ps3_gpu_mutex);
 725         error = ps3vram_wait_ring(dev, 100);
 726         mutex_unlock(&ps3_gpu_mutex);
 727         if (error < 0) {
 728                 dev_err(&dev->core, "Failed to initialize channels\n");
 729                 error = -ETIMEDOUT;
 730                 goto out_unmap_reports;
 731         }
 732
 733         ps3vram_cache_init(dev);
 734         ps3vram_proc_init(dev);
 735
 736         queue = blk_alloc_queue(GFP_KERNEL);
 737         if (!queue) {
 738                 dev_err(&dev->core, "blk_alloc_queue failed\n");
 739                 error = -ENOMEM;
 740                 goto out_cache_cleanup;
 741         }
 742
 743         priv->queue = queue;
 744         queue->queuedata = dev;
 745         blk_queue_make_request(queue, ps3vram_make_request);
 746         blk_queue_max_phys_segments(queue, MAX_PHYS_SEGMENTS);
 747         blk_queue_max_hw_segments(queue, MAX_HW_SEGMENTS);
 748         blk_queue_max_segment_size(queue, MAX_SEGMENT_SIZE);
 749         blk_queue_max_sectors(queue, SAFE_MAX_SECTORS);
 750
 751         gendisk = alloc_disk(1);
 752         if (!gendisk) {
 753                 dev_err(&dev->core, "alloc_disk failed\n");
 754                 error = -ENOMEM;
 755                 goto fail_cleanup_queue;
 756         }
 757
 758         priv->gendisk = gendisk;
 759         gendisk->major = ps3vram_major;
 760         gendisk->first_minor = 0;
 761         gendisk->fops = &ps3vram_fops;
 762         gendisk->queue = queue;
 763         gendisk->private_data = dev;
 764         gendisk->driverfs_dev = &dev->core;
 765         strlcpy(gendisk->disk_name, DEVICE_NAME, sizeof(gendisk->disk_name));
 766         set_capacity(gendisk, priv->size >> 9);
 767
 768         dev_info(&dev->core, "%s: Using %lu MiB of GPU memory\n",
 769                  gendisk->disk_name, get_capacity(gendisk) >> 11);
 770
 771         add_disk(gendisk);
 772         return 0;
 773
 774 fail_cleanup_queue:
 775         blk_cleanup_queue(queue);
 776 out_cache_cleanup:
 777         remove_proc_entry(DEVICE_NAME, NULL);
 778         ps3vram_cache_cleanup(dev);
 779 out_unmap_reports:
 780         iounmap(priv->reports);
 781 out_unmap_ctrl:
 782         iounmap(priv->ctrl);
 783 out_unmap_context:
 784         lv1_gpu_context_iomap(priv->context_handle, XDR_IOIF, xdr_lpar,
 785                               XDR_BUF_SIZE, CBE_IOPTE_M);
 786 out_free_context:
 787         lv1_gpu_context_free(priv->context_handle);
 788 out_free_memory:
 789         lv1_gpu_memory_free(priv->memory_handle);
 790 out_close_gpu:
 791         ps3_close_hv_device(dev);
 792 out_free_xdr_buf:
 793         free_pages((unsigned long) priv->xdr_buf, get_order(XDR_BUF_SIZE));
 794 fail_free_priv:
 795         kfree(priv);
 796         ps3_system_bus_set_driver_data(dev, NULL);
 797 fail:
 798         return error;
 799 }
 800
 801 static int ps3vram_remove(struct ps3_system_bus_device *dev)
 802 {
 803         struct ps3vram_priv *priv = ps3_system_bus_get_driver_data(dev);
 804
 805         del_gendisk(priv->gendisk);
 806         put_disk(priv->gendisk);
 807         blk_cleanup_queue(priv->queue);
 808         remove_proc_entry(DEVICE_NAME, NULL);
 809         ps3vram_cache_cleanup(dev);
 810         iounmap(priv->reports);
 811         iounmap(priv->ctrl);
 812         lv1_gpu_context_iomap(priv->context_handle, XDR_IOIF,
 813                               ps3_mm_phys_to_lpar(__pa(priv->xdr_buf)),
 814                               XDR_BUF_SIZE, CBE_IOPTE_M);
 815         lv1_gpu_context_free(priv->context_handle);
 816         lv1_gpu_memory_free(priv->memory_handle);
 817         ps3_close_hv_device(dev);
 818         free_pages((unsigned long) priv->xdr_buf, get_order(XDR_BUF_SIZE));
 819         kfree(priv);
 820         ps3_system_bus_set_driver_data(dev, NULL);
 821         return 0;
 822 }
 823
 824 static struct ps3_system_bus_driver ps3vram = {
 825         .match_id       = PS3_MATCH_ID_GPU,
 826         .match_sub_id   = PS3_MATCH_SUB_ID_GPU_RAMDISK,
 827         .core.name      = DEVICE_NAME,
 828         .core.owner     = THIS_MODULE,
 829         .probe          = ps3vram_probe,
 830         .remove         = ps3vram_remove,
 831         .shutdown       = ps3vram_remove,
 832 };
 833
 834
 835 static int __init ps3vram_init(void)
 836 {
 837         int error;
 838
 839         if (!firmware_has_feature(FW_FEATURE_PS3_LV1))
 840                 return -ENODEV;
 841
 842         error = register_blkdev(0, DEVICE_NAME);
 843         if (error <= 0) {
 844                 pr_err("%s: register_blkdev failed %d\n", DEVICE_NAME, error);
 845                 return error;
 846         }
 847         ps3vram_major = error;
 848
 849         pr_info("%s: registered block device major %d\n", DEVICE_NAME,
 850                 ps3vram_major);
 851
 852         error = ps3_system_bus_driver_register(&ps3vram);
 853         if (error)
 854                 unregister_blkdev(ps3vram_major, DEVICE_NAME);
 855
 856         return error;
 857 }
 858
 859 static void __exit ps3vram_exit(void)
 860 {
 861         ps3_system_bus_driver_unregister(&ps3vram);
 862         unregister_blkdev(ps3vram_major, DEVICE_NAME);
 863 }
 864
 865 module_init(ps3vram_init);
 866 module_exit(ps3vram_exit);
 867
 868 MODULE_LICENSE("GPL");
 869 MODULE_DESCRIPTION("PS3 Video RAM Storage Driver");
 870 MODULE_AUTHOR("Sony Corporation");
 871 MODULE_ALIAS(PS3_MODULE_ALIAS_GPU_RAMDISK);