drivers/block/ps3vram.c

   1 /*
   2  * ps3vram - Use extra PS3 video ram as MTD block device.
   3  *
   4  * Copyright 2009 Sony Corporation
   5  *
   6  * Based on the MTD ps3vram driver, which is
   7  * Copyright (c) 2007-2008 Jim Paris <jim@jtan.com>
   8  * Added support RSX DMA Vivien Chappelier <vivien.chappelier@free.fr>
   9  */
  10
  11 #include <linux/blkdev.h>
  12 #include <linux/delay.h>
  13 #include <linux/proc_fs.h>
  14 #include <linux/seq_file.h>
  15 #include <linux/slab.h>
  16
  17 #include <asm/cell-regs.h>
  18 #include <asm/firmware.h>
  19 #include <asm/lv1call.h>
  20 #include <asm/ps3.h>
  21 #include <asm/ps3gpu.h>
  22
  23
  24 #define DEVICE_NAME             "ps3vram"
  25
  26
  27 #define XDR_BUF_SIZE (2 * 1024 * 1024) /* XDR buffer (must be 1MiB aligned) */
  28 #define XDR_IOIF 0x0c000000
  29
  30 #define FIFO_BASE XDR_IOIF
  31 #define FIFO_SIZE (64 * 1024)
  32
  33 #define DMA_PAGE_SIZE (4 * 1024)
  34
  35 #define CACHE_PAGE_SIZE (256 * 1024)
  36 #define CACHE_PAGE_COUNT ((XDR_BUF_SIZE - FIFO_SIZE) / CACHE_PAGE_SIZE)
  37
  38 #define CACHE_OFFSET CACHE_PAGE_SIZE
  39 #define FIFO_OFFSET 0
  40
  41 #define CTRL_PUT 0x10
  42 #define CTRL_GET 0x11
  43 #define CTRL_TOP 0x15
  44
  45 #define UPLOAD_SUBCH    1
  46 #define DOWNLOAD_SUBCH  2
  47
  48 #define NV_MEMORY_TO_MEMORY_FORMAT_OFFSET_IN    0x0000030c
  49 #define NV_MEMORY_TO_MEMORY_FORMAT_NOTIFY       0x00000104
  50
  51 #define CACHE_PAGE_PRESENT 1
  52 #define CACHE_PAGE_DIRTY   2
  53
  54 struct ps3vram_tag {
  55         unsigned int address;
  56         unsigned int flags;
  57 };
  58
  59 struct ps3vram_cache {
  60         unsigned int page_count;
  61         unsigned int page_size;
  62         struct ps3vram_tag *tags;
  63         unsigned int hit;
  64         unsigned int miss;
  65 };
  66
  67 struct ps3vram_priv {
  68         struct request_queue *queue;
  69         struct gendisk *gendisk;
  70
  71         u64 size;
  72
  73         u64 memory_handle;
  74         u64 context_handle;
  75         u32 *ctrl;
  76         void *reports;
  77         u8 *xdr_buf;
  78
  79         u32 *fifo_base;
  80         u32 *fifo_ptr;
  81
  82         struct ps3vram_cache cache;
  83
  84         spinlock_t lock;        /* protecting list of bios */
  85         struct bio_list list;
  86 };
  87
  88
  89 static int ps3vram_major;
  90
  91
  92 static const struct block_device_operations ps3vram_fops = {
  93         .owner          = THIS_MODULE,
  94 };
  95
  96
  97 #define DMA_NOTIFIER_HANDLE_BASE 0x66604200 /* first DMA notifier handle */
  98 #define DMA_NOTIFIER_OFFSET_BASE 0x1000     /* first DMA notifier offset */
  99 #define DMA_NOTIFIER_SIZE        0x40
 100 #define NOTIFIER 7      /* notifier used for completion report */
 101
 102 static char *size = "256M";
 103 module_param(size, charp, 0);
 104 MODULE_PARM_DESC(size, "memory size");
 105
 106 static u32 *ps3vram_get_notifier(void *reports, int notifier)
 107 {
 108         return reports + DMA_NOTIFIER_OFFSET_BASE +
 109                DMA_NOTIFIER_SIZE * notifier;
 110 }
 111
 112 static void ps3vram_notifier_reset(struct ps3_system_bus_device *dev)
 113 {
 114         struct ps3vram_priv *priv = ps3_system_bus_get_drvdata(dev);
 115         u32 *notify = ps3vram_get_notifier(priv->reports, NOTIFIER);
 116         int i;
 117
 118         for (i = 0; i < 4; i++)
 119                 notify[i] = 0xffffffff;
 120 }
 121
 122 static int ps3vram_notifier_wait(struct ps3_system_bus_device *dev,
 123                                  unsigned int timeout_ms)
 124 {
 125         struct ps3vram_priv *priv = ps3_system_bus_get_drvdata(dev);
 126         u32 *notify = ps3vram_get_notifier(priv->reports, NOTIFIER);
 127         unsigned long timeout;
 128
 129         for (timeout = 20; timeout; timeout--) {
 130                 if (!notify[3])
 131                         return 0;
 132                 udelay(10);
 133         }
 134
 135         timeout = jiffies + msecs_to_jiffies(timeout_ms);
 136
 137         do {
 138                 if (!notify[3])
 139                         return 0;
 140                 msleep(1);
 141         } while (time_before(jiffies, timeout));
 142
 143         return -ETIMEDOUT;
 144 }
 145
 146 static void ps3vram_init_ring(struct ps3_system_bus_device *dev)
 147 {
 148         struct ps3vram_priv *priv = ps3_system_bus_get_drvdata(dev);
 149
 150         priv->ctrl[CTRL_PUT] = FIFO_BASE + FIFO_OFFSET;
 151         priv->ctrl[CTRL_GET] = FIFO_BASE + FIFO_OFFSET;
 152 }
 153
 154 static int ps3vram_wait_ring(struct ps3_system_bus_device *dev,
 155                              unsigned int timeout_ms)
 156 {
 157         struct ps3vram_priv *priv = ps3_system_bus_get_drvdata(dev);
 158         unsigned long timeout = jiffies + msecs_to_jiffies(timeout_ms);
 159
 160         do {
 161                 if (priv->ctrl[CTRL_PUT] == priv->ctrl[CTRL_GET])
 162                         return 0;
 163                 msleep(1);
 164         } while (time_before(jiffies, timeout));
 165
 166         dev_warn(&dev->core, "FIFO timeout (%08x/%08x/%08x)\n",
 167                  priv->ctrl[CTRL_PUT], priv->ctrl[CTRL_GET],
 168                  priv->ctrl[CTRL_TOP]);
 169
 170         return -ETIMEDOUT;
 171 }
 172
 173 static void ps3vram_out_ring(struct ps3vram_priv *priv, u32 data)
 174 {
 175         *(priv->fifo_ptr)++ = data;
 176 }
 177
 178 static void ps3vram_begin_ring(struct ps3vram_priv *priv, u32 chan, u32 tag,
 179                                u32 size)
 180 {
 181         ps3vram_out_ring(priv, (size << 18) | (chan << 13) | tag);
 182 }
 183
 184 static void ps3vram_rewind_ring(struct ps3_system_bus_device *dev)
 185 {
 186         struct ps3vram_priv *priv = ps3_system_bus_get_drvdata(dev);
 187         int status;
 188
 189         ps3vram_out_ring(priv, 0x20000000 | (FIFO_BASE + FIFO_OFFSET));
 190
 191         priv->ctrl[CTRL_PUT] = FIFO_BASE + FIFO_OFFSET;
 192
 193         /* asking the HV for a blit will kick the FIFO */
 194         status = lv1_gpu_fb_blit(priv->context_handle, 0, 0, 0, 0);
 195         if (status)
 196                 dev_err(&dev->core, "%s: lv1_gpu_fb_blit failed %d\n",
 197                         __func__, status);
 198
 199         priv->fifo_ptr = priv->fifo_base;
 200 }
 201
 202 static void ps3vram_fire_ring(struct ps3_system_bus_device *dev)
 203 {
 204         struct ps3vram_priv *priv = ps3_system_bus_get_drvdata(dev);
 205         int status;
 206
 207         mutex_lock(&ps3_gpu_mutex);
 208
 209         priv->ctrl[CTRL_PUT] = FIFO_BASE + FIFO_OFFSET +
 210                                (priv->fifo_ptr - priv->fifo_base) * sizeof(u32);
 211
 212         /* asking the HV for a blit will kick the FIFO */
 213         status = lv1_gpu_fb_blit(priv->context_handle, 0, 0, 0, 0);
 214         if (status)
 215                 dev_err(&dev->core, "%s: lv1_gpu_fb_blit failed %d\n",
 216                         __func__, status);
 217
 218         if ((priv->fifo_ptr - priv->fifo_base) * sizeof(u32) >
 219             FIFO_SIZE - 1024) {
 220                 dev_dbg(&dev->core, "FIFO full, rewinding\n");
 221                 ps3vram_wait_ring(dev, 200);
 222                 ps3vram_rewind_ring(dev);
 223         }
 224
 225         mutex_unlock(&ps3_gpu_mutex);
 226 }
 227
 228 static void ps3vram_bind(struct ps3_system_bus_device *dev)
 229 {
 230         struct ps3vram_priv *priv = ps3_system_bus_get_drvdata(dev);
 231
 232         ps3vram_begin_ring(priv, UPLOAD_SUBCH, 0, 1);
 233         ps3vram_out_ring(priv, 0x31337303);
 234         ps3vram_begin_ring(priv, UPLOAD_SUBCH, 0x180, 3);
 235         ps3vram_out_ring(priv, DMA_NOTIFIER_HANDLE_BASE + NOTIFIER);
 236         ps3vram_out_ring(priv, 0xfeed0001);     /* DMA system RAM instance */
 237         ps3vram_out_ring(priv, 0xfeed0000);     /* DMA video RAM instance */
 238
 239         ps3vram_begin_ring(priv, DOWNLOAD_SUBCH, 0, 1);
 240         ps3vram_out_ring(priv, 0x3137c0de);
 241         ps3vram_begin_ring(priv, DOWNLOAD_SUBCH, 0x180, 3);
 242         ps3vram_out_ring(priv, DMA_NOTIFIER_HANDLE_BASE + NOTIFIER);
 243         ps3vram_out_ring(priv, 0xfeed0000);     /* DMA video RAM instance */
 244         ps3vram_out_ring(priv, 0xfeed0001);     /* DMA system RAM instance */
 245
 246         ps3vram_fire_ring(dev);
 247 }
 248
 249 static int ps3vram_upload(struct ps3_system_bus_device *dev,
 250                           unsigned int src_offset, unsigned int dst_offset,
 251                           int len, int count)
 252 {
 253         struct ps3vram_priv *priv = ps3_system_bus_get_drvdata(dev);
 254
 255         ps3vram_begin_ring(priv, UPLOAD_SUBCH,
 256                            NV_MEMORY_TO_MEMORY_FORMAT_OFFSET_IN, 8);
 257         ps3vram_out_ring(priv, XDR_IOIF + src_offset);
 258         ps3vram_out_ring(priv, dst_offset);
 259         ps3vram_out_ring(priv, len);
 260         ps3vram_out_ring(priv, len);
 261         ps3vram_out_ring(priv, len);
 262         ps3vram_out_ring(priv, count);
 263         ps3vram_out_ring(priv, (1 << 8) | 1);
 264         ps3vram_out_ring(priv, 0);
 265
 266         ps3vram_notifier_reset(dev);
 267         ps3vram_begin_ring(priv, UPLOAD_SUBCH,
 268                            NV_MEMORY_TO_MEMORY_FORMAT_NOTIFY, 1);
 269         ps3vram_out_ring(priv, 0);
 270         ps3vram_begin_ring(priv, UPLOAD_SUBCH, 0x100, 1);
 271         ps3vram_out_ring(priv, 0);
 272         ps3vram_fire_ring(dev);
 273         if (ps3vram_notifier_wait(dev, 200) < 0) {
 274                 dev_warn(&dev->core, "%s: Notifier timeout\n", __func__);
 275                 return -1;
 276         }
 277
 278         return 0;
 279 }
 280
 281 static int ps3vram_download(struct ps3_system_bus_device *dev,
 282                             unsigned int src_offset, unsigned int dst_offset,
 283                             int len, int count)
 284 {
 285         struct ps3vram_priv *priv = ps3_system_bus_get_drvdata(dev);
 286
 287         ps3vram_begin_ring(priv, DOWNLOAD_SUBCH,
 288                            NV_MEMORY_TO_MEMORY_FORMAT_OFFSET_IN, 8);
 289         ps3vram_out_ring(priv, src_offset);
 290         ps3vram_out_ring(priv, XDR_IOIF + dst_offset);
 291         ps3vram_out_ring(priv, len);
 292         ps3vram_out_ring(priv, len);
 293         ps3vram_out_ring(priv, len);
 294         ps3vram_out_ring(priv, count);
 295         ps3vram_out_ring(priv, (1 << 8) | 1);
 296         ps3vram_out_ring(priv, 0);
 297
 298         ps3vram_notifier_reset(dev);
 299         ps3vram_begin_ring(priv, DOWNLOAD_SUBCH,
 300                            NV_MEMORY_TO_MEMORY_FORMAT_NOTIFY, 1);
 301         ps3vram_out_ring(priv, 0);
 302         ps3vram_begin_ring(priv, DOWNLOAD_SUBCH, 0x100, 1);
 303         ps3vram_out_ring(priv, 0);
 304         ps3vram_fire_ring(dev);
 305         if (ps3vram_notifier_wait(dev, 200) < 0) {
 306                 dev_warn(&dev->core, "%s: Notifier timeout\n", __func__);
 307                 return -1;
 308         }
 309
 310         return 0;
 311 }
 312
 313 static void ps3vram_cache_evict(struct ps3_system_bus_device *dev, int entry)
 314 {
 315         struct ps3vram_priv *priv = ps3_system_bus_get_drvdata(dev);
 316         struct ps3vram_cache *cache = &priv->cache;
 317
 318         if (!(cache->tags[entry].flags & CACHE_PAGE_DIRTY))
 319                 return;
 320
 321         dev_dbg(&dev->core, "Flushing %d: 0x%08x\n", entry,
 322                 cache->tags[entry].address);
 323         if (ps3vram_upload(dev, CACHE_OFFSET + entry * cache->page_size,
 324                            cache->tags[entry].address, DMA_PAGE_SIZE,
 325                            cache->page_size / DMA_PAGE_SIZE) < 0) {
 326                 dev_err(&dev->core,
 327                         "Failed to upload from 0x%x to " "0x%x size 0x%x\n",
 328                         entry * cache->page_size, cache->tags[entry].address,
 329                         cache->page_size);
 330         }
 331         cache->tags[entry].flags &= ~CACHE_PAGE_DIRTY;
 332 }
 333
 334 static void ps3vram_cache_load(struct ps3_system_bus_device *dev, int entry,
 335                                unsigned int address)
 336 {
 337         struct ps3vram_priv *priv = ps3_system_bus_get_drvdata(dev);
 338         struct ps3vram_cache *cache = &priv->cache;
 339
 340         dev_dbg(&dev->core, "Fetching %d: 0x%08x\n", entry, address);
 341         if (ps3vram_download(dev, address,
 342                              CACHE_OFFSET + entry * cache->page_size,
 343                              DMA_PAGE_SIZE,
 344                              cache->page_size / DMA_PAGE_SIZE) < 0) {
 345                 dev_err(&dev->core,
 346                         "Failed to download from 0x%x to 0x%x size 0x%x\n",
 347                         address, entry * cache->page_size, cache->page_size);
 348         }
 349
 350         cache->tags[entry].address = address;
 351         cache->tags[entry].flags |= CACHE_PAGE_PRESENT;
 352 }
 353
 354
 355 static void ps3vram_cache_flush(struct ps3_system_bus_device *dev)
 356 {
 357         struct ps3vram_priv *priv = ps3_system_bus_get_drvdata(dev);
 358         struct ps3vram_cache *cache = &priv->cache;
 359         int i;
 360
 361         dev_dbg(&dev->core, "FLUSH\n");
 362         for (i = 0; i < cache->page_count; i++) {
 363                 ps3vram_cache_evict(dev, i);
 364                 cache->tags[i].flags = 0;
 365         }
 366 }
 367
 368 static unsigned int ps3vram_cache_match(struct ps3_system_bus_device *dev,
 369                                         loff_t address)
 370 {
 371         struct ps3vram_priv *priv = ps3_system_bus_get_drvdata(dev);
 372         struct ps3vram_cache *cache = &priv->cache;
 373         unsigned int base;
 374         unsigned int offset;
 375         int i;
 376         static int counter;
 377
 378         offset = (unsigned int) (address & (cache->page_size - 1));
 379         base = (unsigned int) (address - offset);
 380
 381         /* fully associative check */
 382         for (i = 0; i < cache->page_count; i++) {
 383                 if ((cache->tags[i].flags & CACHE_PAGE_PRESENT) &&
 384                     cache->tags[i].address == base) {
 385                         cache->hit++;
 386                         dev_dbg(&dev->core, "Found entry %d: 0x%08x\n", i,
 387                                 cache->tags[i].address);
 388                         return i;
 389                 }
 390         }
 391
 392         /* choose a random entry */
 393         i = (jiffies + (counter++)) % cache->page_count;
 394         dev_dbg(&dev->core, "Using entry %d\n", i);
 395
 396         ps3vram_cache_evict(dev, i);
 397         ps3vram_cache_load(dev, i, base);
 398
 399         cache->miss++;
 400         return i;
 401 }
 402
 403 static int ps3vram_cache_init(struct ps3_system_bus_device *dev)
 404 {
 405         struct ps3vram_priv *priv = ps3_system_bus_get_drvdata(dev);
 406
 407         priv->cache.page_count = CACHE_PAGE_COUNT;
 408         priv->cache.page_size = CACHE_PAGE_SIZE;
 409         priv->cache.tags = kzalloc(sizeof(struct ps3vram_tag) *
 410                                    CACHE_PAGE_COUNT, GFP_KERNEL);
 411         if (priv->cache.tags == NULL) {
 412                 dev_err(&dev->core, "Could not allocate cache tags\n");
 413                 return -ENOMEM;
 414         }
 415
 416         dev_info(&dev->core, "Created ram cache: %d entries, %d KiB each\n",
 417                 CACHE_PAGE_COUNT, CACHE_PAGE_SIZE / 1024);
 418
 419         return 0;
 420 }
 421
 422 static void ps3vram_cache_cleanup(struct ps3_system_bus_device *dev)
 423 {
 424         struct ps3vram_priv *priv = ps3_system_bus_get_drvdata(dev);
 425
 426         ps3vram_cache_flush(dev);
 427         kfree(priv->cache.tags);
 428 }
 429
 430 static int ps3vram_read(struct ps3_system_bus_device *dev, loff_t from,
 431                         size_t len, size_t *retlen, u_char *buf)
 432 {
 433         struct ps3vram_priv *priv = ps3_system_bus_get_drvdata(dev);
 434         unsigned int cached, count;
 435
 436         dev_dbg(&dev->core, "%s: from=0x%08x len=0x%zx\n", __func__,
 437                 (unsigned int)from, len);
 438
 439         if (from >= priv->size)
 440                 return -EIO;
 441
 442         if (len > priv->size - from)
 443                 len = priv->size - from;
 444
 445         /* Copy from vram to buf */
 446         count = len;
 447         while (count) {
 448                 unsigned int offset, avail;
 449                 unsigned int entry;
 450
 451                 offset = (unsigned int) (from & (priv->cache.page_size - 1));
 452                 avail  = priv->cache.page_size - offset;
 453
 454                 entry = ps3vram_cache_match(dev, from);
 455                 cached = CACHE_OFFSET + entry * priv->cache.page_size + offset;
 456
 457                 dev_dbg(&dev->core, "%s: from=%08x cached=%08x offset=%08x "
 458                         "avail=%08x count=%08x\n", __func__,
 459                         (unsigned int)from, cached, offset, avail, count);
 460
 461                 if (avail > count)
 462                         avail = count;
 463                 memcpy(buf, priv->xdr_buf + cached, avail);
 464
 465                 buf += avail;
 466                 count -= avail;
 467                 from += avail;
 468         }
 469
 470         *retlen = len;
 471         return 0;
 472 }
 473
 474 static int ps3vram_write(struct ps3_system_bus_device *dev, loff_t to,
 475                          size_t len, size_t *retlen, const u_char *buf)
 476 {
 477         struct ps3vram_priv *priv = ps3_system_bus_get_drvdata(dev);
 478         unsigned int cached, count;
 479
 480         if (to >= priv->size)
 481                 return -EIO;
 482
 483         if (len > priv->size - to)
 484                 len = priv->size - to;
 485
 486         /* Copy from buf to vram */
 487         count = len;
 488         while (count) {
 489                 unsigned int offset, avail;
 490                 unsigned int entry;
 491
 492                 offset = (unsigned int) (to & (priv->cache.page_size - 1));
 493                 avail  = priv->cache.page_size - offset;
 494
 495                 entry = ps3vram_cache_match(dev, to);
 496                 cached = CACHE_OFFSET + entry * priv->cache.page_size + offset;
 497
 498                 dev_dbg(&dev->core, "%s: to=%08x cached=%08x offset=%08x "
 499                         "avail=%08x count=%08x\n", __func__, (unsigned int)to,
 500                         cached, offset, avail, count);
 501
 502                 if (avail > count)
 503                         avail = count;
 504                 memcpy(priv->xdr_buf + cached, buf, avail);
 505
 506                 priv->cache.tags[entry].flags |= CACHE_PAGE_DIRTY;
 507
 508                 buf += avail;
 509                 count -= avail;
 510                 to += avail;
 511         }
 512
 513         *retlen = len;
 514         return 0;
 515 }
 516
 517 static int ps3vram_proc_show(struct seq_file *m, void *v)
 518 {
 519         struct ps3vram_priv *priv = m->private;
 520
 521         seq_printf(m, "hit:%u\nmiss:%u\n", priv->cache.hit, priv->cache.miss);
 522         return 0;
 523 }
 524
 525 static int ps3vram_proc_open(struct inode *inode, struct file *file)
 526 {
 527         return single_open(file, ps3vram_proc_show, PDE(inode)->data);
 528 }
 529
 530 static const struct file_operations ps3vram_proc_fops = {
 531         .owner          = THIS_MODULE,
 532         .open           = ps3vram_proc_open,
 533         .read           = seq_read,
 534         .llseek         = seq_lseek,
 535         .release        = single_release,
 536 };
 537
 538 static void __devinit ps3vram_proc_init(struct ps3_system_bus_device *dev)
 539 {
 540         struct ps3vram_priv *priv = ps3_system_bus_get_drvdata(dev);
 541         struct proc_dir_entry *pde;
 542
 543         pde = proc_create_data(DEVICE_NAME, 0444, NULL, &ps3vram_proc_fops,
 544                                priv);
 545         if (!pde)
 546                 dev_warn(&dev->core, "failed to create /proc entry\n");
 547 }
 548
 549 static struct bio *ps3vram_do_bio(struct ps3_system_bus_device *dev,
 550                                   struct bio *bio)
 551 {
 552         struct ps3vram_priv *priv = ps3_system_bus_get_drvdata(dev);
 553         int write = bio_data_dir(bio) == WRITE;
 554         const char *op = write ? "write" : "read";
 555         loff_t offset = bio->bi_sector << 9;
 556         int error = 0;
 557         struct bio_vec *bvec;
 558         unsigned int i;
 559         struct bio *next;
 560
 561         bio_for_each_segment(bvec, bio, i) {
 562                 /* PS3 is ppc64, so we don't handle highmem */
 563                 char *ptr = page_address(bvec->bv_page) + bvec->bv_offset;
 564                 size_t len = bvec->bv_len, retlen;
 565
 566                 dev_dbg(&dev->core, "    %s %zu bytes at offset %llu\n", op,
 567                         len, offset);
 568                 if (write)
 569                         error = ps3vram_write(dev, offset, len, &retlen, ptr);
 570                 else
 571                         error = ps3vram_read(dev, offset, len, &retlen, ptr);
 572
 573                 if (error) {
 574                         dev_err(&dev->core, "%s failed\n", op);
 575                         goto out;
 576                 }
 577
 578                 if (retlen != len) {
 579                         dev_err(&dev->core, "Short %s\n", op);
 580                         error = -EIO;
 581                         goto out;
 582                 }
 583
 584                 offset += len;
 585         }
 586
 587         dev_dbg(&dev->core, "%s completed\n", op);
 588
 589 out:
 590         spin_lock_irq(&priv->lock);
 591         bio_list_pop(&priv->list);
 592         next = bio_list_peek(&priv->list);
 593         spin_unlock_irq(&priv->lock);
 594
 595         bio_endio(bio, error);
 596         return next;
 597 }
 598
 599 static int ps3vram_make_request(struct request_queue *q, struct bio *bio)
 600 {
 601         struct ps3_system_bus_device *dev = q->queuedata;
 602         struct ps3vram_priv *priv = ps3_system_bus_get_drvdata(dev);
 603         int busy;
 604
 605         dev_dbg(&dev->core, "%s\n", __func__);
 606
 607         spin_lock_irq(&priv->lock);
 608         busy = !bio_list_empty(&priv->list);
 609         bio_list_add(&priv->list, bio);
 610         spin_unlock_irq(&priv->lock);
 611
 612         if (busy)
 613                 return 0;
 614
 615         do {
 616                 bio = ps3vram_do_bio(dev, bio);
 617         } while (bio);
 618
 619         return 0;
 620 }
 621
 622 static int __devinit ps3vram_probe(struct ps3_system_bus_device *dev)
 623 {
 624         struct ps3vram_priv *priv;
 625         int error, status;
 626         struct request_queue *queue;
 627         struct gendisk *gendisk;
 628         u64 ddr_size, ddr_lpar, ctrl_lpar, info_lpar, reports_lpar,
 629             reports_size, xdr_lpar;
 630         char *rest;
 631
 632         priv = kzalloc(sizeof(*priv), GFP_KERNEL);
 633         if (!priv) {
 634                 error = -ENOMEM;
 635                 goto fail;
 636         }
 637
 638         spin_lock_init(&priv->lock);
 639         bio_list_init(&priv->list);
 640         ps3_system_bus_set_drvdata(dev, priv);
 641
 642         /* Allocate XDR buffer (1MiB aligned) */
 643         priv->xdr_buf = (void *)__get_free_pages(GFP_KERNEL,
 644                 get_order(XDR_BUF_SIZE));
 645         if (priv->xdr_buf == NULL) {
 646                 dev_err(&dev->core, "Could not allocate XDR buffer\n");
 647                 error = -ENOMEM;
 648                 goto fail_free_priv;
 649         }
 650
 651         /* Put FIFO at begginning of XDR buffer */
 652         priv->fifo_base = (u32 *) (priv->xdr_buf + FIFO_OFFSET);
 653         priv->fifo_ptr = priv->fifo_base;
 654
 655         /* XXX: Need to open GPU, in case ps3fb or snd_ps3 aren't loaded */
 656         if (ps3_open_hv_device(dev)) {
 657                 dev_err(&dev->core, "ps3_open_hv_device failed\n");
 658                 error = -EAGAIN;
 659                 goto out_free_xdr_buf;
 660         }
 661
 662         /* Request memory */
 663         status = -1;
 664         ddr_size = ALIGN(memparse(size, &rest), 1024*1024);
 665         if (!ddr_size) {
 666                 dev_err(&dev->core, "Specified size is too small\n");
 667                 error = -EINVAL;
 668                 goto out_close_gpu;
 669         }
 670
 671         while (ddr_size > 0) {
 672                 status = lv1_gpu_memory_allocate(ddr_size, 0, 0, 0, 0,
 673                                                  &priv->memory_handle,
 674                                                  &ddr_lpar);
 675                 if (!status)
 676                         break;
 677                 ddr_size -= 1024*1024;
 678         }
 679         if (status) {
 680                 dev_err(&dev->core, "lv1_gpu_memory_allocate failed %d\n",
 681                         status);
 682                 error = -ENOMEM;
 683                 goto out_close_gpu;
 684         }
 685
 686         /* Request context */
 687         status = lv1_gpu_context_allocate(priv->memory_handle, 0,
 688                                           &priv->context_handle, &ctrl_lpar,
 689                                           &info_lpar, &reports_lpar,
 690                                           &reports_size);
 691         if (status) {
 692                 dev_err(&dev->core, "lv1_gpu_context_allocate failed %d\n",
 693                         status);
 694                 error = -ENOMEM;
 695                 goto out_free_memory;
 696         }
 697
 698         /* Map XDR buffer to RSX */
 699         xdr_lpar = ps3_mm_phys_to_lpar(__pa(priv->xdr_buf));
 700         status = lv1_gpu_context_iomap(priv->context_handle, XDR_IOIF,
 701                                        xdr_lpar, XDR_BUF_SIZE,
 702                                        CBE_IOPTE_PP_W | CBE_IOPTE_PP_R |
 703                                        CBE_IOPTE_M);
 704         if (status) {
 705                 dev_err(&dev->core, "lv1_gpu_context_iomap failed %d\n",
 706                         status);
 707                 error = -ENOMEM;
 708                 goto out_free_context;
 709         }
 710
 711         priv->ctrl = ioremap(ctrl_lpar, 64 * 1024);
 712         if (!priv->ctrl) {
 713                 dev_err(&dev->core, "ioremap CTRL failed\n");
 714                 error = -ENOMEM;
 715                 goto out_unmap_context;
 716         }
 717
 718         priv->reports = ioremap(reports_lpar, reports_size);
 719         if (!priv->reports) {
 720                 dev_err(&dev->core, "ioremap REPORTS failed\n");
 721                 error = -ENOMEM;
 722                 goto out_unmap_ctrl;
 723         }
 724
 725         mutex_lock(&ps3_gpu_mutex);
 726         ps3vram_init_ring(dev);
 727         mutex_unlock(&ps3_gpu_mutex);
 728
 729         priv->size = ddr_size;
 730
 731         ps3vram_bind(dev);
 732
 733         mutex_lock(&ps3_gpu_mutex);
 734         error = ps3vram_wait_ring(dev, 100);
 735         mutex_unlock(&ps3_gpu_mutex);
 736         if (error < 0) {
 737                 dev_err(&dev->core, "Failed to initialize channels\n");
 738                 error = -ETIMEDOUT;
 739                 goto out_unmap_reports;
 740         }
 741
 742         ps3vram_cache_init(dev);
 743         ps3vram_proc_init(dev);
 744
 745         queue = blk_alloc_queue(GFP_KERNEL);
 746         if (!queue) {
 747                 dev_err(&dev->core, "blk_alloc_queue failed\n");
 748                 error = -ENOMEM;
 749                 goto out_cache_cleanup;
 750         }
 751
 752         priv->queue = queue;
 753         queue->queuedata = dev;
 754         blk_queue_make_request(queue, ps3vram_make_request);
 755         blk_queue_max_segments(queue, BLK_MAX_SEGMENTS);
 756         blk_queue_max_segment_size(queue, BLK_MAX_SEGMENT_SIZE);
 757         blk_queue_max_hw_sectors(queue, BLK_SAFE_MAX_SECTORS);
 758
 759         gendisk = alloc_disk(1);
 760         if (!gendisk) {
 761                 dev_err(&dev->core, "alloc_disk failed\n");
 762                 error = -ENOMEM;
 763                 goto fail_cleanup_queue;
 764         }
 765
 766         priv->gendisk = gendisk;
 767         gendisk->major = ps3vram_major;
 768         gendisk->first_minor = 0;
 769         gendisk->fops = &ps3vram_fops;
 770         gendisk->queue = queue;
 771         gendisk->private_data = dev;
 772         gendisk->driverfs_dev = &dev->core;
 773         strlcpy(gendisk->disk_name, DEVICE_NAME, sizeof(gendisk->disk_name));
 774         set_capacity(gendisk, priv->size >> 9);
 775
 776         dev_info(&dev->core, "%s: Using %lu MiB of GPU memory\n",
 777                  gendisk->disk_name, get_capacity(gendisk) >> 11);
 778
 779         add_disk(gendisk);
 780         return 0;
 781
 782 fail_cleanup_queue:
 783         blk_cleanup_queue(queue);
 784 out_cache_cleanup:
 785         remove_proc_entry(DEVICE_NAME, NULL);
 786         ps3vram_cache_cleanup(dev);
 787 out_unmap_reports:
 788         iounmap(priv->reports);
 789 out_unmap_ctrl:
 790         iounmap(priv->ctrl);
 791 out_unmap_context:
 792         lv1_gpu_context_iomap(priv->context_handle, XDR_IOIF, xdr_lpar,
 793                               XDR_BUF_SIZE, CBE_IOPTE_M);
 794 out_free_context:
 795         lv1_gpu_context_free(priv->context_handle);
 796 out_free_memory:
 797         lv1_gpu_memory_free(priv->memory_handle);
 798 out_close_gpu:
 799         ps3_close_hv_device(dev);
 800 out_free_xdr_buf:
 801         free_pages((unsigned long) priv->xdr_buf, get_order(XDR_BUF_SIZE));
 802 fail_free_priv:
 803         kfree(priv);
 804         ps3_system_bus_set_drvdata(dev, NULL);
 805 fail:
 806         return error;
 807 }
 808
 809 static int ps3vram_remove(struct ps3_system_bus_device *dev)
 810 {
 811         struct ps3vram_priv *priv = ps3_system_bus_get_drvdata(dev);
 812
 813         del_gendisk(priv->gendisk);
 814         put_disk(priv->gendisk);
 815         blk_cleanup_queue(priv->queue);
 816         remove_proc_entry(DEVICE_NAME, NULL);
 817         ps3vram_cache_cleanup(dev);
 818         iounmap(priv->reports);
 819         iounmap(priv->ctrl);
 820         lv1_gpu_context_iomap(priv->context_handle, XDR_IOIF,
 821                               ps3_mm_phys_to_lpar(__pa(priv->xdr_buf)),
 822                               XDR_BUF_SIZE, CBE_IOPTE_M);
 823         lv1_gpu_context_free(priv->context_handle);
 824         lv1_gpu_memory_free(priv->memory_handle);
 825         ps3_close_hv_device(dev);
 826         free_pages((unsigned long) priv->xdr_buf, get_order(XDR_BUF_SIZE));
 827         kfree(priv);
 828         ps3_system_bus_set_drvdata(dev, NULL);
 829         return 0;
 830 }
 831
 832 static struct ps3_system_bus_driver ps3vram = {
 833         .match_id       = PS3_MATCH_ID_GPU,
 834         .match_sub_id   = PS3_MATCH_SUB_ID_GPU_RAMDISK,
 835         .core.name      = DEVICE_NAME,
 836         .core.owner     = THIS_MODULE,
 837         .probe          = ps3vram_probe,
 838         .remove         = ps3vram_remove,
 839         .shutdown       = ps3vram_remove,
 840 };
 841
 842
 843 static int __init ps3vram_init(void)
 844 {
 845         int error;
 846
 847         if (!firmware_has_feature(FW_FEATURE_PS3_LV1))
 848                 return -ENODEV;
 849
 850         error = register_blkdev(0, DEVICE_NAME);
 851         if (error <= 0) {
 852                 pr_err("%s: register_blkdev failed %d\n", DEVICE_NAME, error);
 853                 return error;
 854         }
 855         ps3vram_major = error;
 856
 857         pr_info("%s: registered block device major %d\n", DEVICE_NAME,
 858                 ps3vram_major);
 859
 860         error = ps3_system_bus_driver_register(&ps3vram);
 861         if (error)
 862                 unregister_blkdev(ps3vram_major, DEVICE_NAME);
 863
 864         return error;
 865 }
 866
 867 static void __exit ps3vram_exit(void)
 868 {
 869         ps3_system_bus_driver_unregister(&ps3vram);
 870         unregister_blkdev(ps3vram_major, DEVICE_NAME);
 871 }
 872
 873 module_init(ps3vram_init);
 874 module_exit(ps3vram_exit);
 875
 876 MODULE_LICENSE("GPL");
 877 MODULE_DESCRIPTION("PS3 Video RAM Storage Driver");
 878 MODULE_AUTHOR("Sony Corporation");
 879 MODULE_ALIAS(PS3_MODULE_ALIAS_GPU_RAMDISK);