drivers/block/ps3vram.c

   1 /*
   2  * ps3vram - Use extra PS3 video ram as 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/module.h>
  14 #include <linux/proc_fs.h>
  15 #include <linux/seq_file.h>
  16 #include <linux/slab.h>
  17
  18 #include <asm/cell-regs.h>
  19 #include <asm/firmware.h>
  20 #include <asm/lv1call.h>
  21 #include <asm/ps3.h>
  22 #include <asm/ps3gpu.h>
  23
  24
  25 #define DEVICE_NAME             "ps3vram"
  26
  27
  28 #define XDR_BUF_SIZE (2 * 1024 * 1024) /* XDR buffer (must be 1MiB aligned) */
  29 #define XDR_IOIF 0x0c000000
  30
  31 #define FIFO_BASE XDR_IOIF
  32 #define FIFO_SIZE (64 * 1024)
  33
  34 #define DMA_PAGE_SIZE (4 * 1024)
  35
  36 #define CACHE_PAGE_SIZE (256 * 1024)
  37 #define CACHE_PAGE_COUNT ((XDR_BUF_SIZE - FIFO_SIZE) / CACHE_PAGE_SIZE)
  38
  39 #define CACHE_OFFSET CACHE_PAGE_SIZE
  40 #define FIFO_OFFSET 0
  41
  42 #define CTRL_PUT 0x10
  43 #define CTRL_GET 0x11
  44 #define CTRL_TOP 0x15
  45
  46 #define UPLOAD_SUBCH    1
  47 #define DOWNLOAD_SUBCH  2
  48
  49 #define NV_MEMORY_TO_MEMORY_FORMAT_OFFSET_IN    0x0000030c
  50 #define NV_MEMORY_TO_MEMORY_FORMAT_NOTIFY       0x00000104
  51
  52 #define CACHE_PAGE_PRESENT 1
  53 #define CACHE_PAGE_DIRTY   2
  54
  55 struct ps3vram_tag {
  56         unsigned int address;
  57         unsigned int flags;
  58 };
  59
  60 struct ps3vram_cache {
  61         unsigned int page_count;
  62         unsigned int page_size;
  63         struct ps3vram_tag *tags;
  64         unsigned int hit;
  65         unsigned int miss;
  66 };
  67
  68 struct ps3vram_priv {
  69         struct request_queue *queue;
  70         struct gendisk *gendisk;
  71
  72         u64 size;
  73
  74         u64 memory_handle;
  75         u64 context_handle;
  76         u32 __iomem *ctrl;
  77         void __iomem *reports;
  78         u8 *xdr_buf;
  79
  80         u32 *fifo_base;
  81         u32 *fifo_ptr;
  82
  83         struct ps3vram_cache cache;
  84
  85         spinlock_t lock;        /* protecting list of bios */
  86         struct bio_list list;
  87 };
  88
  89
  90 static int ps3vram_major;
  91
  92
  93 static const struct block_device_operations ps3vram_fops = {
  94         .owner          = THIS_MODULE,
  95 };
  96
  97
  98 #define DMA_NOTIFIER_HANDLE_BASE 0x66604200 /* first DMA notifier handle */
  99 #define DMA_NOTIFIER_OFFSET_BASE 0x1000     /* first DMA notifier offset */
 100 #define DMA_NOTIFIER_SIZE        0x40
 101 #define NOTIFIER 7      /* notifier used for completion report */
 102
 103 static char *size = "256M";
 104 module_param(size, charp, 0);
 105 MODULE_PARM_DESC(size, "memory size");
 106
 107 static u32 __iomem *ps3vram_get_notifier(void __iomem *reports, int notifier)
 108 {
 109         return reports + DMA_NOTIFIER_OFFSET_BASE +
 110                DMA_NOTIFIER_SIZE * notifier;
 111 }
 112
 113 static void ps3vram_notifier_reset(struct ps3_system_bus_device *dev)
 114 {
 115         struct ps3vram_priv *priv = ps3_system_bus_get_drvdata(dev);
 116         u32 __iomem *notify = ps3vram_get_notifier(priv->reports, NOTIFIER);
 117         int i;
 118
 119         for (i = 0; i < 4; i++)
 120                 iowrite32be(0xffffffff, notify + i);
 121 }
 122
 123 static int ps3vram_notifier_wait(struct ps3_system_bus_device *dev,
 124                                  unsigned int timeout_ms)
 125 {
 126         struct ps3vram_priv *priv = ps3_system_bus_get_drvdata(dev);
 127         u32 __iomem *notify = ps3vram_get_notifier(priv->reports, NOTIFIER);
 128         unsigned long timeout;
 129
 130         for (timeout = 20; timeout; timeout--) {
 131                 if (!ioread32be(notify + 3))
 132                         return 0;
 133                 udelay(10);
 134         }
 135
 136         timeout = jiffies + msecs_to_jiffies(timeout_ms);
 137
 138         do {
 139                 if (!ioread32be(notify + 3))
 140                         return 0;
 141                 msleep(1);
 142         } while (time_before(jiffies, timeout));
 143
 144         return -ETIMEDOUT;
 145 }
 146
 147 static void ps3vram_init_ring(struct ps3_system_bus_device *dev)
 148 {
 149         struct ps3vram_priv *priv = ps3_system_bus_get_drvdata(dev);
 150
 151         iowrite32be(FIFO_BASE + FIFO_OFFSET, priv->ctrl + CTRL_PUT);
 152         iowrite32be(FIFO_BASE + FIFO_OFFSET, priv->ctrl + CTRL_GET);
 153 }
 154
 155 static int ps3vram_wait_ring(struct ps3_system_bus_device *dev,
 156                              unsigned int timeout_ms)
 157 {
 158         struct ps3vram_priv *priv = ps3_system_bus_get_drvdata(dev);
 159         unsigned long timeout = jiffies + msecs_to_jiffies(timeout_ms);
 160
 161         do {
 162                 if (ioread32be(priv->ctrl + CTRL_PUT) == ioread32be(priv->ctrl + CTRL_GET))
 163                         return 0;
 164                 msleep(1);
 165         } while (time_before(jiffies, timeout));
 166
 167         dev_warn(&dev->core, "FIFO timeout (%08x/%08x/%08x)\n",
 168                  ioread32be(priv->ctrl + CTRL_PUT), ioread32be(priv->ctrl + CTRL_GET),
 169                  ioread32be(priv->ctrl + CTRL_TOP));
 170
 171         return -ETIMEDOUT;
 172 }
 173
 174 static void ps3vram_out_ring(struct ps3vram_priv *priv, u32 data)
 175 {
 176         *(priv->fifo_ptr)++ = data;
 177 }
 178
 179 static void ps3vram_begin_ring(struct ps3vram_priv *priv, u32 chan, u32 tag,
 180                                u32 size)
 181 {
 182         ps3vram_out_ring(priv, (size << 18) | (chan << 13) | tag);
 183 }
 184
 185 static void ps3vram_rewind_ring(struct ps3_system_bus_device *dev)
 186 {
 187         struct ps3vram_priv *priv = ps3_system_bus_get_drvdata(dev);
 188         int status;
 189
 190         ps3vram_out_ring(priv, 0x20000000 | (FIFO_BASE + FIFO_OFFSET));
 191
 192         iowrite32be(FIFO_BASE + FIFO_OFFSET, priv->ctrl + CTRL_PUT);
 193
 194         /* asking the HV for a blit will kick the FIFO */
 195         status = lv1_gpu_fb_blit(priv->context_handle, 0, 0, 0, 0);
 196         if (status)
 197                 dev_err(&dev->core, "%s: lv1_gpu_fb_blit failed %d\n",
 198                         __func__, status);
 199
 200         priv->fifo_ptr = priv->fifo_base;
 201 }
 202
 203 static void ps3vram_fire_ring(struct ps3_system_bus_device *dev)
 204 {
 205         struct ps3vram_priv *priv = ps3_system_bus_get_drvdata(dev);
 206         int status;
 207
 208         mutex_lock(&ps3_gpu_mutex);
 209
 210         iowrite32be(FIFO_BASE + FIFO_OFFSET + (priv->fifo_ptr - priv->fifo_base)
 211                 * sizeof(u32), priv->ctrl + CTRL_PUT);
 212
 213         /* asking the HV for a blit will kick the FIFO */
 214         status = lv1_gpu_fb_blit(priv->context_handle, 0, 0, 0, 0);
 215         if (status)
 216                 dev_err(&dev->core, "%s: lv1_gpu_fb_blit failed %d\n",
 217                         __func__, status);
 218
 219         if ((priv->fifo_ptr - priv->fifo_base) * sizeof(u32) >
 220             FIFO_SIZE - 1024) {
 221                 dev_dbg(&dev->core, "FIFO full, rewinding\n");
 222                 ps3vram_wait_ring(dev, 200);
 223                 ps3vram_rewind_ring(dev);
 224         }
 225
 226         mutex_unlock(&ps3_gpu_mutex);
 227 }
 228
 229 static void ps3vram_bind(struct ps3_system_bus_device *dev)
 230 {
 231         struct ps3vram_priv *priv = ps3_system_bus_get_drvdata(dev);
 232
 233         ps3vram_begin_ring(priv, UPLOAD_SUBCH, 0, 1);
 234         ps3vram_out_ring(priv, 0x31337303);
 235         ps3vram_begin_ring(priv, UPLOAD_SUBCH, 0x180, 3);
 236         ps3vram_out_ring(priv, DMA_NOTIFIER_HANDLE_BASE + NOTIFIER);
 237         ps3vram_out_ring(priv, 0xfeed0001);     /* DMA system RAM instance */
 238         ps3vram_out_ring(priv, 0xfeed0000);     /* DMA video RAM instance */
 239
 240         ps3vram_begin_ring(priv, DOWNLOAD_SUBCH, 0, 1);
 241         ps3vram_out_ring(priv, 0x3137c0de);
 242         ps3vram_begin_ring(priv, DOWNLOAD_SUBCH, 0x180, 3);
 243         ps3vram_out_ring(priv, DMA_NOTIFIER_HANDLE_BASE + NOTIFIER);
 244         ps3vram_out_ring(priv, 0xfeed0000);     /* DMA video RAM instance */
 245         ps3vram_out_ring(priv, 0xfeed0001);     /* DMA system RAM instance */
 246
 247         ps3vram_fire_ring(dev);
 248 }
 249
 250 static int ps3vram_upload(struct ps3_system_bus_device *dev,
 251                           unsigned int src_offset, unsigned int dst_offset,
 252                           int len, int count)
 253 {
 254         struct ps3vram_priv *priv = ps3_system_bus_get_drvdata(dev);
 255
 256         ps3vram_begin_ring(priv, UPLOAD_SUBCH,
 257                            NV_MEMORY_TO_MEMORY_FORMAT_OFFSET_IN, 8);
 258         ps3vram_out_ring(priv, XDR_IOIF + src_offset);
 259         ps3vram_out_ring(priv, dst_offset);
 260         ps3vram_out_ring(priv, len);
 261         ps3vram_out_ring(priv, len);
 262         ps3vram_out_ring(priv, len);
 263         ps3vram_out_ring(priv, count);
 264         ps3vram_out_ring(priv, (1 << 8) | 1);
 265         ps3vram_out_ring(priv, 0);
 266
 267         ps3vram_notifier_reset(dev);
 268         ps3vram_begin_ring(priv, UPLOAD_SUBCH,
 269                            NV_MEMORY_TO_MEMORY_FORMAT_NOTIFY, 1);
 270         ps3vram_out_ring(priv, 0);
 271         ps3vram_begin_ring(priv, UPLOAD_SUBCH, 0x100, 1);
 272         ps3vram_out_ring(priv, 0);
 273         ps3vram_fire_ring(dev);
 274         if (ps3vram_notifier_wait(dev, 200) < 0) {
 275                 dev_warn(&dev->core, "%s: Notifier timeout\n", __func__);
 276                 return -1;
 277         }
 278
 279         return 0;
 280 }
 281
 282 static int ps3vram_download(struct ps3_system_bus_device *dev,
 283                             unsigned int src_offset, unsigned int dst_offset,
 284                             int len, int count)
 285 {
 286         struct ps3vram_priv *priv = ps3_system_bus_get_drvdata(dev);
 287
 288         ps3vram_begin_ring(priv, DOWNLOAD_SUBCH,
 289                            NV_MEMORY_TO_MEMORY_FORMAT_OFFSET_IN, 8);
 290         ps3vram_out_ring(priv, src_offset);
 291         ps3vram_out_ring(priv, XDR_IOIF + dst_offset);
 292         ps3vram_out_ring(priv, len);
 293         ps3vram_out_ring(priv, len);
 294         ps3vram_out_ring(priv, len);
 295         ps3vram_out_ring(priv, count);
 296         ps3vram_out_ring(priv, (1 << 8) | 1);
 297         ps3vram_out_ring(priv, 0);
 298
 299         ps3vram_notifier_reset(dev);
 300         ps3vram_begin_ring(priv, DOWNLOAD_SUBCH,
 301                            NV_MEMORY_TO_MEMORY_FORMAT_NOTIFY, 1);
 302         ps3vram_out_ring(priv, 0);
 303         ps3vram_begin_ring(priv, DOWNLOAD_SUBCH, 0x100, 1);
 304         ps3vram_out_ring(priv, 0);
 305         ps3vram_fire_ring(dev);
 306         if (ps3vram_notifier_wait(dev, 200) < 0) {
 307                 dev_warn(&dev->core, "%s: Notifier timeout\n", __func__);
 308                 return -1;
 309         }
 310
 311         return 0;
 312 }
 313
 314 static void ps3vram_cache_evict(struct ps3_system_bus_device *dev, int entry)
 315 {
 316         struct ps3vram_priv *priv = ps3_system_bus_get_drvdata(dev);
 317         struct ps3vram_cache *cache = &priv->cache;
 318
 319         if (!(cache->tags[entry].flags & CACHE_PAGE_DIRTY))
 320                 return;
 321
 322         dev_dbg(&dev->core, "Flushing %d: 0x%08x\n", entry,
 323                 cache->tags[entry].address);
 324         if (ps3vram_upload(dev, CACHE_OFFSET + entry * cache->page_size,
 325                            cache->tags[entry].address, DMA_PAGE_SIZE,
 326                            cache->page_size / DMA_PAGE_SIZE) < 0) {
 327                 dev_err(&dev->core,
 328                         "Failed to upload from 0x%x to " "0x%x size 0x%x\n",
 329                         entry * cache->page_size, cache->tags[entry].address,
 330                         cache->page_size);
 331         }
 332         cache->tags[entry].flags &= ~CACHE_PAGE_DIRTY;
 333 }
 334
 335 static void ps3vram_cache_load(struct ps3_system_bus_device *dev, int entry,
 336                                unsigned int address)
 337 {
 338         struct ps3vram_priv *priv = ps3_system_bus_get_drvdata(dev);
 339         struct ps3vram_cache *cache = &priv->cache;
 340
 341         dev_dbg(&dev->core, "Fetching %d: 0x%08x\n", entry, address);
 342         if (ps3vram_download(dev, address,
 343                              CACHE_OFFSET + entry * cache->page_size,
 344                              DMA_PAGE_SIZE,
 345                              cache->page_size / DMA_PAGE_SIZE) < 0) {
 346                 dev_err(&dev->core,
 347                         "Failed to download from 0x%x to 0x%x size 0x%x\n",
 348                         address, entry * cache->page_size, cache->page_size);
 349         }
 350
 351         cache->tags[entry].address = address;
 352         cache->tags[entry].flags |= CACHE_PAGE_PRESENT;
 353 }
 354
 355
 356 static void ps3vram_cache_flush(struct ps3_system_bus_device *dev)
 357 {
 358         struct ps3vram_priv *priv = ps3_system_bus_get_drvdata(dev);
 359         struct ps3vram_cache *cache = &priv->cache;
 360         int i;
 361
 362         dev_dbg(&dev->core, "FLUSH\n");
 363         for (i = 0; i < cache->page_count; i++) {
 364                 ps3vram_cache_evict(dev, i);
 365                 cache->tags[i].flags = 0;
 366         }
 367 }
 368
 369 static unsigned int ps3vram_cache_match(struct ps3_system_bus_device *dev,
 370                                         loff_t address)
 371 {
 372         struct ps3vram_priv *priv = ps3_system_bus_get_drvdata(dev);
 373         struct ps3vram_cache *cache = &priv->cache;
 374         unsigned int base;
 375         unsigned int offset;
 376         int i;
 377         static int counter;
 378
 379         offset = (unsigned int) (address & (cache->page_size - 1));
 380         base = (unsigned int) (address - offset);
 381
 382         /* fully associative check */
 383         for (i = 0; i < cache->page_count; i++) {
 384                 if ((cache->tags[i].flags & CACHE_PAGE_PRESENT) &&
 385                     cache->tags[i].address == base) {
 386                         cache->hit++;
 387                         dev_dbg(&dev->core, "Found entry %d: 0x%08x\n", i,
 388                                 cache->tags[i].address);
 389                         return i;
 390                 }
 391         }
 392
 393         /* choose a random entry */
 394         i = (jiffies + (counter++)) % cache->page_count;
 395         dev_dbg(&dev->core, "Using entry %d\n", i);
 396
 397         ps3vram_cache_evict(dev, i);
 398         ps3vram_cache_load(dev, i, base);
 399
 400         cache->miss++;
 401         return i;
 402 }
 403
 404 static int ps3vram_cache_init(struct ps3_system_bus_device *dev)
 405 {
 406         struct ps3vram_priv *priv = ps3_system_bus_get_drvdata(dev);
 407
 408         priv->cache.page_count = CACHE_PAGE_COUNT;
 409         priv->cache.page_size = CACHE_PAGE_SIZE;
 410         priv->cache.tags = kzalloc(sizeof(struct ps3vram_tag) *
 411                                    CACHE_PAGE_COUNT, GFP_KERNEL);
 412         if (!priv->cache.tags)
 413                 return -ENOMEM;
 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 blk_status_t 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 BLK_STS_IOERR;
 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 blk_status_t 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 BLK_STS_IOERR;
 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_DATA(inode));
 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 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_iter.bi_sector << 9;
 555         blk_status_t error = 0;
 556         struct bio_vec bvec;
 557         struct bvec_iter iter;
 558         struct bio *next;
 559
 560         bio_for_each_segment(bvec, bio, iter) {
 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 = BLK_STS_IOERR;
 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->bi_status = error;
 595         bio_endio(bio);
 596         return next;
 597 }
 598
 599 static blk_qc_t 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         blk_queue_split(q, &bio);
 608
 609         spin_lock_irq(&priv->lock);
 610         busy = !bio_list_empty(&priv->list);
 611         bio_list_add(&priv->list, bio);
 612         spin_unlock_irq(&priv->lock);
 613
 614         if (busy)
 615                 return BLK_QC_T_NONE;
 616
 617         do {
 618                 bio = ps3vram_do_bio(dev, bio);
 619         } while (bio);
 620
 621         return BLK_QC_T_NONE;
 622 }
 623
 624 static int ps3vram_probe(struct ps3_system_bus_device *dev)
 625 {
 626         struct ps3vram_priv *priv;
 627         int error, status;
 628         struct request_queue *queue;
 629         struct gendisk *gendisk;
 630         u64 ddr_size, ddr_lpar, ctrl_lpar, info_lpar, reports_lpar,
 631             reports_size, xdr_lpar;
 632         char *rest;
 633
 634         priv = kzalloc(sizeof(*priv), GFP_KERNEL);
 635         if (!priv) {
 636                 error = -ENOMEM;
 637                 goto fail;
 638         }
 639
 640         spin_lock_init(&priv->lock);
 641         bio_list_init(&priv->list);
 642         ps3_system_bus_set_drvdata(dev, priv);
 643
 644         /* Allocate XDR buffer (1MiB aligned) */
 645         priv->xdr_buf = (void *)__get_free_pages(GFP_KERNEL,
 646                 get_order(XDR_BUF_SIZE));
 647         if (priv->xdr_buf == NULL) {
 648                 dev_err(&dev->core, "Could not allocate XDR buffer\n");
 649                 error = -ENOMEM;
 650                 goto fail_free_priv;
 651         }
 652
 653         /* Put FIFO at begginning of XDR buffer */
 654         priv->fifo_base = (u32 *) (priv->xdr_buf + FIFO_OFFSET);
 655         priv->fifo_ptr = priv->fifo_base;
 656
 657         /* XXX: Need to open GPU, in case ps3fb or snd_ps3 aren't loaded */
 658         if (ps3_open_hv_device(dev)) {
 659                 dev_err(&dev->core, "ps3_open_hv_device failed\n");
 660                 error = -EAGAIN;
 661                 goto out_free_xdr_buf;
 662         }
 663
 664         /* Request memory */
 665         status = -1;
 666         ddr_size = ALIGN(memparse(size, &rest), 1024*1024);
 667         if (!ddr_size) {
 668                 dev_err(&dev->core, "Specified size is too small\n");
 669                 error = -EINVAL;
 670                 goto out_close_gpu;
 671         }
 672
 673         while (ddr_size > 0) {
 674                 status = lv1_gpu_memory_allocate(ddr_size, 0, 0, 0, 0,
 675                                                  &priv->memory_handle,
 676                                                  &ddr_lpar);
 677                 if (!status)
 678                         break;
 679                 ddr_size -= 1024*1024;
 680         }
 681         if (status) {
 682                 dev_err(&dev->core, "lv1_gpu_memory_allocate failed %d\n",
 683                         status);
 684                 error = -ENOMEM;
 685                 goto out_close_gpu;
 686         }
 687
 688         /* Request context */
 689         status = lv1_gpu_context_allocate(priv->memory_handle, 0,
 690                                           &priv->context_handle, &ctrl_lpar,
 691                                           &info_lpar, &reports_lpar,
 692                                           &reports_size);
 693         if (status) {
 694                 dev_err(&dev->core, "lv1_gpu_context_allocate failed %d\n",
 695                         status);
 696                 error = -ENOMEM;
 697                 goto out_free_memory;
 698         }
 699
 700         /* Map XDR buffer to RSX */
 701         xdr_lpar = ps3_mm_phys_to_lpar(__pa(priv->xdr_buf));
 702         status = lv1_gpu_context_iomap(priv->context_handle, XDR_IOIF,
 703                                        xdr_lpar, XDR_BUF_SIZE,
 704                                        CBE_IOPTE_PP_W | CBE_IOPTE_PP_R |
 705                                        CBE_IOPTE_M);
 706         if (status) {
 707                 dev_err(&dev->core, "lv1_gpu_context_iomap failed %d\n",
 708                         status);
 709                 error = -ENOMEM;
 710                 goto out_free_context;
 711         }
 712
 713         priv->ctrl = ioremap(ctrl_lpar, 64 * 1024);
 714         if (!priv->ctrl) {
 715                 dev_err(&dev->core, "ioremap CTRL failed\n");
 716                 error = -ENOMEM;
 717                 goto out_unmap_context;
 718         }
 719
 720         priv->reports = ioremap(reports_lpar, reports_size);
 721         if (!priv->reports) {
 722                 dev_err(&dev->core, "ioremap REPORTS failed\n");
 723                 error = -ENOMEM;
 724                 goto out_unmap_ctrl;
 725         }
 726
 727         mutex_lock(&ps3_gpu_mutex);
 728         ps3vram_init_ring(dev);
 729         mutex_unlock(&ps3_gpu_mutex);
 730
 731         priv->size = ddr_size;
 732
 733         ps3vram_bind(dev);
 734
 735         mutex_lock(&ps3_gpu_mutex);
 736         error = ps3vram_wait_ring(dev, 100);
 737         mutex_unlock(&ps3_gpu_mutex);
 738         if (error < 0) {
 739                 dev_err(&dev->core, "Failed to initialize channels\n");
 740                 error = -ETIMEDOUT;
 741                 goto out_unmap_reports;
 742         }
 743
 744         error = ps3vram_cache_init(dev);
 745         if (error < 0) {
 746                 goto out_unmap_reports;
 747         }
 748
 749         ps3vram_proc_init(dev);
 750
 751         queue = blk_alloc_queue(GFP_KERNEL);
 752         if (!queue) {
 753                 dev_err(&dev->core, "blk_alloc_queue failed\n");
 754                 error = -ENOMEM;
 755                 goto out_cache_cleanup;
 756         }
 757
 758         priv->queue = queue;
 759         queue->queuedata = dev;
 760         blk_queue_make_request(queue, ps3vram_make_request);
 761         blk_queue_max_segments(queue, BLK_MAX_SEGMENTS);
 762         blk_queue_max_segment_size(queue, BLK_MAX_SEGMENT_SIZE);
 763         blk_queue_max_hw_sectors(queue, BLK_SAFE_MAX_SECTORS);
 764
 765         gendisk = alloc_disk(1);
 766         if (!gendisk) {
 767                 dev_err(&dev->core, "alloc_disk failed\n");
 768                 error = -ENOMEM;
 769                 goto fail_cleanup_queue;
 770         }
 771
 772         priv->gendisk = gendisk;
 773         gendisk->major = ps3vram_major;
 774         gendisk->first_minor = 0;
 775         gendisk->fops = &ps3vram_fops;
 776         gendisk->queue = queue;
 777         gendisk->private_data = dev;
 778         strlcpy(gendisk->disk_name, DEVICE_NAME, sizeof(gendisk->disk_name));
 779         set_capacity(gendisk, priv->size >> 9);
 780
 781         dev_info(&dev->core, "%s: Using %lu MiB of GPU memory\n",
 782                  gendisk->disk_name, get_capacity(gendisk) >> 11);
 783
 784         device_add_disk(&dev->core, gendisk);
 785         return 0;
 786
 787 fail_cleanup_queue:
 788         blk_cleanup_queue(queue);
 789 out_cache_cleanup:
 790         remove_proc_entry(DEVICE_NAME, NULL);
 791         ps3vram_cache_cleanup(dev);
 792 out_unmap_reports:
 793         iounmap(priv->reports);
 794 out_unmap_ctrl:
 795         iounmap(priv->ctrl);
 796 out_unmap_context:
 797         lv1_gpu_context_iomap(priv->context_handle, XDR_IOIF, xdr_lpar,
 798                               XDR_BUF_SIZE, CBE_IOPTE_M);
 799 out_free_context:
 800         lv1_gpu_context_free(priv->context_handle);
 801 out_free_memory:
 802         lv1_gpu_memory_free(priv->memory_handle);
 803 out_close_gpu:
 804         ps3_close_hv_device(dev);
 805 out_free_xdr_buf:
 806         free_pages((unsigned long) priv->xdr_buf, get_order(XDR_BUF_SIZE));
 807 fail_free_priv:
 808         kfree(priv);
 809         ps3_system_bus_set_drvdata(dev, NULL);
 810 fail:
 811         return error;
 812 }
 813
 814 static int ps3vram_remove(struct ps3_system_bus_device *dev)
 815 {
 816         struct ps3vram_priv *priv = ps3_system_bus_get_drvdata(dev);
 817
 818         del_gendisk(priv->gendisk);
 819         put_disk(priv->gendisk);
 820         blk_cleanup_queue(priv->queue);
 821         remove_proc_entry(DEVICE_NAME, NULL);
 822         ps3vram_cache_cleanup(dev);
 823         iounmap(priv->reports);
 824         iounmap(priv->ctrl);
 825         lv1_gpu_context_iomap(priv->context_handle, XDR_IOIF,
 826                               ps3_mm_phys_to_lpar(__pa(priv->xdr_buf)),
 827                               XDR_BUF_SIZE, CBE_IOPTE_M);
 828         lv1_gpu_context_free(priv->context_handle);
 829         lv1_gpu_memory_free(priv->memory_handle);
 830         ps3_close_hv_device(dev);
 831         free_pages((unsigned long) priv->xdr_buf, get_order(XDR_BUF_SIZE));
 832         kfree(priv);
 833         ps3_system_bus_set_drvdata(dev, NULL);
 834         return 0;
 835 }
 836
 837 static struct ps3_system_bus_driver ps3vram = {
 838         .match_id       = PS3_MATCH_ID_GPU,
 839         .match_sub_id   = PS3_MATCH_SUB_ID_GPU_RAMDISK,
 840         .core.name      = DEVICE_NAME,
 841         .core.owner     = THIS_MODULE,
 842         .probe          = ps3vram_probe,
 843         .remove         = ps3vram_remove,
 844         .shutdown       = ps3vram_remove,
 845 };
 846
 847
 848 static int __init ps3vram_init(void)
 849 {
 850         int error;
 851
 852         if (!firmware_has_feature(FW_FEATURE_PS3_LV1))
 853                 return -ENODEV;
 854
 855         error = register_blkdev(0, DEVICE_NAME);
 856         if (error <= 0) {
 857                 pr_err("%s: register_blkdev failed %d\n", DEVICE_NAME, error);
 858                 return error;
 859         }
 860         ps3vram_major = error;
 861
 862         pr_info("%s: registered block device major %d\n", DEVICE_NAME,
 863                 ps3vram_major);
 864
 865         error = ps3_system_bus_driver_register(&ps3vram);
 866         if (error)
 867                 unregister_blkdev(ps3vram_major, DEVICE_NAME);
 868
 869         return error;
 870 }
 871
 872 static void __exit ps3vram_exit(void)
 873 {
 874         ps3_system_bus_driver_unregister(&ps3vram);
 875         unregister_blkdev(ps3vram_major, DEVICE_NAME);
 876 }
 877
 878 module_init(ps3vram_init);
 879 module_exit(ps3vram_exit);
 880
 881 MODULE_LICENSE("GPL");
 882 MODULE_DESCRIPTION("PS3 Video RAM Storage Driver");
 883 MODULE_AUTHOR("Sony Corporation");
 884 MODULE_ALIAS(PS3_MODULE_ALIAS_GPU_RAMDISK);