drivers/block/ps3vram.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * ps3vram - Use extra PS3 video ram as block device.
   4  *
   5  * Copyright 2009 Sony Corporation
   6  *
   7  * Based on the MTD ps3vram driver, which is
   8  * Copyright (c) 2007-2008 Jim Paris <jim@jtan.com>
   9  * Added support RSX DMA Vivien Chappelier <vivien.chappelier@free.fr>
  10  */
  11
  12 #include <linux/blkdev.h>
  13 #include <linux/delay.h>
  14 #include <linux/module.h>
  15 #include <linux/proc_fs.h>
  16 #include <linux/seq_file.h>
  17 #include <linux/slab.h>
  18
  19 #include <asm/cell-regs.h>
  20 #include <asm/firmware.h>
  21 #include <asm/lv1call.h>
  22 #include <asm/ps3.h>
  23 #include <asm/ps3gpu.h>
  24
  25
  26 #define DEVICE_NAME             "ps3vram"
  27
  28
  29 #define XDR_BUF_SIZE (2 * 1024 * 1024) /* XDR buffer (must be 1MiB aligned) */
  30 #define XDR_IOIF 0x0c000000
  31
  32 #define FIFO_BASE XDR_IOIF
  33 #define FIFO_SIZE (64 * 1024)
  34
  35 #define DMA_PAGE_SIZE (4 * 1024)
  36
  37 #define CACHE_PAGE_SIZE (256 * 1024)
  38 #define CACHE_PAGE_COUNT ((XDR_BUF_SIZE - FIFO_SIZE) / CACHE_PAGE_SIZE)
  39
  40 #define CACHE_OFFSET CACHE_PAGE_SIZE
  41 #define FIFO_OFFSET 0
  42
  43 #define CTRL_PUT 0x10
  44 #define CTRL_GET 0x11
  45 #define CTRL_TOP 0x15
  46
  47 #define UPLOAD_SUBCH    1
  48 #define DOWNLOAD_SUBCH  2
  49
  50 #define NV_MEMORY_TO_MEMORY_FORMAT_OFFSET_IN    0x0000030c
  51 #define NV_MEMORY_TO_MEMORY_FORMAT_NOTIFY       0x00000104
  52
  53 #define CACHE_PAGE_PRESENT 1
  54 #define CACHE_PAGE_DIRTY   2
  55
  56 struct ps3vram_tag {
  57         unsigned int address;
  58         unsigned int flags;
  59 };
  60
  61 struct ps3vram_cache {
  62         unsigned int page_count;
  63         unsigned int page_size;
  64         struct ps3vram_tag *tags;
  65         unsigned int hit;
  66         unsigned int miss;
  67 };
  68
  69 struct ps3vram_priv {
  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 #define DMA_NOTIFIER_HANDLE_BASE 0x66604200 /* first DMA notifier handle */
  93 #define DMA_NOTIFIER_OFFSET_BASE 0x1000     /* first DMA notifier offset */
  94 #define DMA_NOTIFIER_SIZE        0x40
  95 #define NOTIFIER 7      /* notifier used for completion report */
  96
  97 static char *size = "256M";
  98 module_param(size, charp, 0);
  99 MODULE_PARM_DESC(size, "memory size");
 100
 101 static u32 __iomem *ps3vram_get_notifier(void __iomem *reports, int notifier)
 102 {
 103         return reports + DMA_NOTIFIER_OFFSET_BASE +
 104                DMA_NOTIFIER_SIZE * notifier;
 105 }
 106
 107 static void ps3vram_notifier_reset(struct ps3_system_bus_device *dev)
 108 {
 109         struct ps3vram_priv *priv = ps3_system_bus_get_drvdata(dev);
 110         u32 __iomem *notify = ps3vram_get_notifier(priv->reports, NOTIFIER);
 111         int i;
 112
 113         for (i = 0; i < 4; i++)
 114                 iowrite32be(0xffffffff, notify + i);
 115 }
 116
 117 static int ps3vram_notifier_wait(struct ps3_system_bus_device *dev,
 118                                  unsigned int timeout_ms)
 119 {
 120         struct ps3vram_priv *priv = ps3_system_bus_get_drvdata(dev);
 121         u32 __iomem *notify = ps3vram_get_notifier(priv->reports, NOTIFIER);
 122         unsigned long timeout;
 123
 124         for (timeout = 20; timeout; timeout--) {
 125                 if (!ioread32be(notify + 3))
 126                         return 0;
 127                 udelay(10);
 128         }
 129
 130         timeout = jiffies + msecs_to_jiffies(timeout_ms);
 131
 132         do {
 133                 if (!ioread32be(notify + 3))
 134                         return 0;
 135                 msleep(1);
 136         } while (time_before(jiffies, timeout));
 137
 138         return -ETIMEDOUT;
 139 }
 140
 141 static void ps3vram_init_ring(struct ps3_system_bus_device *dev)
 142 {
 143         struct ps3vram_priv *priv = ps3_system_bus_get_drvdata(dev);
 144
 145         iowrite32be(FIFO_BASE + FIFO_OFFSET, priv->ctrl + CTRL_PUT);
 146         iowrite32be(FIFO_BASE + FIFO_OFFSET, priv->ctrl + CTRL_GET);
 147 }
 148
 149 static int ps3vram_wait_ring(struct ps3_system_bus_device *dev,
 150                              unsigned int timeout_ms)
 151 {
 152         struct ps3vram_priv *priv = ps3_system_bus_get_drvdata(dev);
 153         unsigned long timeout = jiffies + msecs_to_jiffies(timeout_ms);
 154
 155         do {
 156                 if (ioread32be(priv->ctrl + CTRL_PUT) == ioread32be(priv->ctrl + CTRL_GET))
 157                         return 0;
 158                 msleep(1);
 159         } while (time_before(jiffies, timeout));
 160
 161         dev_warn(&dev->core, "FIFO timeout (%08x/%08x/%08x)\n",
 162                  ioread32be(priv->ctrl + CTRL_PUT), ioread32be(priv->ctrl + CTRL_GET),
 163                  ioread32be(priv->ctrl + CTRL_TOP));
 164
 165         return -ETIMEDOUT;
 166 }
 167
 168 static void ps3vram_out_ring(struct ps3vram_priv *priv, u32 data)
 169 {
 170         *(priv->fifo_ptr)++ = data;
 171 }
 172
 173 static void ps3vram_begin_ring(struct ps3vram_priv *priv, u32 chan, u32 tag,
 174                                u32 size)
 175 {
 176         ps3vram_out_ring(priv, (size << 18) | (chan << 13) | tag);
 177 }
 178
 179 static void ps3vram_rewind_ring(struct ps3_system_bus_device *dev)
 180 {
 181         struct ps3vram_priv *priv = ps3_system_bus_get_drvdata(dev);
 182         int status;
 183
 184         ps3vram_out_ring(priv, 0x20000000 | (FIFO_BASE + FIFO_OFFSET));
 185
 186         iowrite32be(FIFO_BASE + FIFO_OFFSET, priv->ctrl + CTRL_PUT);
 187
 188         /* asking the HV for a blit will kick the FIFO */
 189         status = lv1_gpu_fb_blit(priv->context_handle, 0, 0, 0, 0);
 190         if (status)
 191                 dev_err(&dev->core, "%s: lv1_gpu_fb_blit failed %d\n",
 192                         __func__, status);
 193
 194         priv->fifo_ptr = priv->fifo_base;
 195 }
 196
 197 static void ps3vram_fire_ring(struct ps3_system_bus_device *dev)
 198 {
 199         struct ps3vram_priv *priv = ps3_system_bus_get_drvdata(dev);
 200         int status;
 201
 202         mutex_lock(&ps3_gpu_mutex);
 203
 204         iowrite32be(FIFO_BASE + FIFO_OFFSET + (priv->fifo_ptr - priv->fifo_base)
 205                 * sizeof(u32), priv->ctrl + CTRL_PUT);
 206
 207         /* asking the HV for a blit will kick the FIFO */
 208         status = lv1_gpu_fb_blit(priv->context_handle, 0, 0, 0, 0);
 209         if (status)
 210                 dev_err(&dev->core, "%s: lv1_gpu_fb_blit failed %d\n",
 211                         __func__, status);
 212
 213         if ((priv->fifo_ptr - priv->fifo_base) * sizeof(u32) >
 214             FIFO_SIZE - 1024) {
 215                 dev_dbg(&dev->core, "FIFO full, rewinding\n");
 216                 ps3vram_wait_ring(dev, 200);
 217                 ps3vram_rewind_ring(dev);
 218         }
 219
 220         mutex_unlock(&ps3_gpu_mutex);
 221 }
 222
 223 static void ps3vram_bind(struct ps3_system_bus_device *dev)
 224 {
 225         struct ps3vram_priv *priv = ps3_system_bus_get_drvdata(dev);
 226
 227         ps3vram_begin_ring(priv, UPLOAD_SUBCH, 0, 1);
 228         ps3vram_out_ring(priv, 0x31337303);
 229         ps3vram_begin_ring(priv, UPLOAD_SUBCH, 0x180, 3);
 230         ps3vram_out_ring(priv, DMA_NOTIFIER_HANDLE_BASE + NOTIFIER);
 231         ps3vram_out_ring(priv, 0xfeed0001);     /* DMA system RAM instance */
 232         ps3vram_out_ring(priv, 0xfeed0000);     /* DMA video RAM instance */
 233
 234         ps3vram_begin_ring(priv, DOWNLOAD_SUBCH, 0, 1);
 235         ps3vram_out_ring(priv, 0x3137c0de);
 236         ps3vram_begin_ring(priv, DOWNLOAD_SUBCH, 0x180, 3);
 237         ps3vram_out_ring(priv, DMA_NOTIFIER_HANDLE_BASE + NOTIFIER);
 238         ps3vram_out_ring(priv, 0xfeed0000);     /* DMA video RAM instance */
 239         ps3vram_out_ring(priv, 0xfeed0001);     /* DMA system RAM instance */
 240
 241         ps3vram_fire_ring(dev);
 242 }
 243
 244 static int ps3vram_upload(struct ps3_system_bus_device *dev,
 245                           unsigned int src_offset, unsigned int dst_offset,
 246                           int len, int count)
 247 {
 248         struct ps3vram_priv *priv = ps3_system_bus_get_drvdata(dev);
 249
 250         ps3vram_begin_ring(priv, UPLOAD_SUBCH,
 251                            NV_MEMORY_TO_MEMORY_FORMAT_OFFSET_IN, 8);
 252         ps3vram_out_ring(priv, XDR_IOIF + src_offset);
 253         ps3vram_out_ring(priv, dst_offset);
 254         ps3vram_out_ring(priv, len);
 255         ps3vram_out_ring(priv, len);
 256         ps3vram_out_ring(priv, len);
 257         ps3vram_out_ring(priv, count);
 258         ps3vram_out_ring(priv, (1 << 8) | 1);
 259         ps3vram_out_ring(priv, 0);
 260
 261         ps3vram_notifier_reset(dev);
 262         ps3vram_begin_ring(priv, UPLOAD_SUBCH,
 263                            NV_MEMORY_TO_MEMORY_FORMAT_NOTIFY, 1);
 264         ps3vram_out_ring(priv, 0);
 265         ps3vram_begin_ring(priv, UPLOAD_SUBCH, 0x100, 1);
 266         ps3vram_out_ring(priv, 0);
 267         ps3vram_fire_ring(dev);
 268         if (ps3vram_notifier_wait(dev, 200) < 0) {
 269                 dev_warn(&dev->core, "%s: Notifier timeout\n", __func__);
 270                 return -1;
 271         }
 272
 273         return 0;
 274 }
 275
 276 static int ps3vram_download(struct ps3_system_bus_device *dev,
 277                             unsigned int src_offset, unsigned int dst_offset,
 278                             int len, int count)
 279 {
 280         struct ps3vram_priv *priv = ps3_system_bus_get_drvdata(dev);
 281
 282         ps3vram_begin_ring(priv, DOWNLOAD_SUBCH,
 283                            NV_MEMORY_TO_MEMORY_FORMAT_OFFSET_IN, 8);
 284         ps3vram_out_ring(priv, src_offset);
 285         ps3vram_out_ring(priv, XDR_IOIF + dst_offset);
 286         ps3vram_out_ring(priv, len);
 287         ps3vram_out_ring(priv, len);
 288         ps3vram_out_ring(priv, len);
 289         ps3vram_out_ring(priv, count);
 290         ps3vram_out_ring(priv, (1 << 8) | 1);
 291         ps3vram_out_ring(priv, 0);
 292
 293         ps3vram_notifier_reset(dev);
 294         ps3vram_begin_ring(priv, DOWNLOAD_SUBCH,
 295                            NV_MEMORY_TO_MEMORY_FORMAT_NOTIFY, 1);
 296         ps3vram_out_ring(priv, 0);
 297         ps3vram_begin_ring(priv, DOWNLOAD_SUBCH, 0x100, 1);
 298         ps3vram_out_ring(priv, 0);
 299         ps3vram_fire_ring(dev);
 300         if (ps3vram_notifier_wait(dev, 200) < 0) {
 301                 dev_warn(&dev->core, "%s: Notifier timeout\n", __func__);
 302                 return -1;
 303         }
 304
 305         return 0;
 306 }
 307
 308 static void ps3vram_cache_evict(struct ps3_system_bus_device *dev, int entry)
 309 {
 310         struct ps3vram_priv *priv = ps3_system_bus_get_drvdata(dev);
 311         struct ps3vram_cache *cache = &priv->cache;
 312
 313         if (!(cache->tags[entry].flags & CACHE_PAGE_DIRTY))
 314                 return;
 315
 316         dev_dbg(&dev->core, "Flushing %d: 0x%08x\n", entry,
 317                 cache->tags[entry].address);
 318         if (ps3vram_upload(dev, CACHE_OFFSET + entry * cache->page_size,
 319                            cache->tags[entry].address, DMA_PAGE_SIZE,
 320                            cache->page_size / DMA_PAGE_SIZE) < 0) {
 321                 dev_err(&dev->core,
 322                         "Failed to upload from 0x%x to " "0x%x size 0x%x\n",
 323                         entry * cache->page_size, cache->tags[entry].address,
 324                         cache->page_size);
 325         }
 326         cache->tags[entry].flags &= ~CACHE_PAGE_DIRTY;
 327 }
 328
 329 static void ps3vram_cache_load(struct ps3_system_bus_device *dev, int entry,
 330                                unsigned int address)
 331 {
 332         struct ps3vram_priv *priv = ps3_system_bus_get_drvdata(dev);
 333         struct ps3vram_cache *cache = &priv->cache;
 334
 335         dev_dbg(&dev->core, "Fetching %d: 0x%08x\n", entry, address);
 336         if (ps3vram_download(dev, address,
 337                              CACHE_OFFSET + entry * cache->page_size,
 338                              DMA_PAGE_SIZE,
 339                              cache->page_size / DMA_PAGE_SIZE) < 0) {
 340                 dev_err(&dev->core,
 341                         "Failed to download from 0x%x to 0x%x size 0x%x\n",
 342                         address, entry * cache->page_size, cache->page_size);
 343         }
 344
 345         cache->tags[entry].address = address;
 346         cache->tags[entry].flags |= CACHE_PAGE_PRESENT;
 347 }
 348
 349
 350 static void ps3vram_cache_flush(struct ps3_system_bus_device *dev)
 351 {
 352         struct ps3vram_priv *priv = ps3_system_bus_get_drvdata(dev);
 353         struct ps3vram_cache *cache = &priv->cache;
 354         int i;
 355
 356         dev_dbg(&dev->core, "FLUSH\n");
 357         for (i = 0; i < cache->page_count; i++) {
 358                 ps3vram_cache_evict(dev, i);
 359                 cache->tags[i].flags = 0;
 360         }
 361 }
 362
 363 static unsigned int ps3vram_cache_match(struct ps3_system_bus_device *dev,
 364                                         loff_t address)
 365 {
 366         struct ps3vram_priv *priv = ps3_system_bus_get_drvdata(dev);
 367         struct ps3vram_cache *cache = &priv->cache;
 368         unsigned int base;
 369         unsigned int offset;
 370         int i;
 371         static int counter;
 372
 373         offset = (unsigned int) (address & (cache->page_size - 1));
 374         base = (unsigned int) (address - offset);
 375
 376         /* fully associative check */
 377         for (i = 0; i < cache->page_count; i++) {
 378                 if ((cache->tags[i].flags & CACHE_PAGE_PRESENT) &&
 379                     cache->tags[i].address == base) {
 380                         cache->hit++;
 381                         dev_dbg(&dev->core, "Found entry %d: 0x%08x\n", i,
 382                                 cache->tags[i].address);
 383                         return i;
 384                 }
 385         }
 386
 387         /* choose a random entry */
 388         i = (jiffies + (counter++)) % cache->page_count;
 389         dev_dbg(&dev->core, "Using entry %d\n", i);
 390
 391         ps3vram_cache_evict(dev, i);
 392         ps3vram_cache_load(dev, i, base);
 393
 394         cache->miss++;
 395         return i;
 396 }
 397
 398 static int ps3vram_cache_init(struct ps3_system_bus_device *dev)
 399 {
 400         struct ps3vram_priv *priv = ps3_system_bus_get_drvdata(dev);
 401
 402         priv->cache.page_count = CACHE_PAGE_COUNT;
 403         priv->cache.page_size = CACHE_PAGE_SIZE;
 404         priv->cache.tags = kcalloc(CACHE_PAGE_COUNT,
 405                                    sizeof(struct ps3vram_tag),
 406                                    GFP_KERNEL);
 407         if (!priv->cache.tags)
 408                 return -ENOMEM;
 409
 410         dev_info(&dev->core, "Created ram cache: %d entries, %d KiB each\n",
 411                 CACHE_PAGE_COUNT, CACHE_PAGE_SIZE / 1024);
 412
 413         return 0;
 414 }
 415
 416 static void ps3vram_cache_cleanup(struct ps3_system_bus_device *dev)
 417 {
 418         struct ps3vram_priv *priv = ps3_system_bus_get_drvdata(dev);
 419
 420         ps3vram_cache_flush(dev);
 421         kfree(priv->cache.tags);
 422 }
 423
 424 static blk_status_t ps3vram_read(struct ps3_system_bus_device *dev, loff_t from,
 425                         size_t len, size_t *retlen, u_char *buf)
 426 {
 427         struct ps3vram_priv *priv = ps3_system_bus_get_drvdata(dev);
 428         unsigned int cached, count;
 429
 430         dev_dbg(&dev->core, "%s: from=0x%08x len=0x%zx\n", __func__,
 431                 (unsigned int)from, len);
 432
 433         if (from >= priv->size)
 434                 return BLK_STS_IOERR;
 435
 436         if (len > priv->size - from)
 437                 len = priv->size - from;
 438
 439         /* Copy from vram to buf */
 440         count = len;
 441         while (count) {
 442                 unsigned int offset, avail;
 443                 unsigned int entry;
 444
 445                 offset = (unsigned int) (from & (priv->cache.page_size - 1));
 446                 avail  = priv->cache.page_size - offset;
 447
 448                 entry = ps3vram_cache_match(dev, from);
 449                 cached = CACHE_OFFSET + entry * priv->cache.page_size + offset;
 450
 451                 dev_dbg(&dev->core, "%s: from=%08x cached=%08x offset=%08x "
 452                         "avail=%08x count=%08x\n", __func__,
 453                         (unsigned int)from, cached, offset, avail, count);
 454
 455                 if (avail > count)
 456                         avail = count;
 457                 memcpy(buf, priv->xdr_buf + cached, avail);
 458
 459                 buf += avail;
 460                 count -= avail;
 461                 from += avail;
 462         }
 463
 464         *retlen = len;
 465         return 0;
 466 }
 467
 468 static blk_status_t ps3vram_write(struct ps3_system_bus_device *dev, loff_t to,
 469                          size_t len, size_t *retlen, const u_char *buf)
 470 {
 471         struct ps3vram_priv *priv = ps3_system_bus_get_drvdata(dev);
 472         unsigned int cached, count;
 473
 474         if (to >= priv->size)
 475                 return BLK_STS_IOERR;
 476
 477         if (len > priv->size - to)
 478                 len = priv->size - to;
 479
 480         /* Copy from buf to vram */
 481         count = len;
 482         while (count) {
 483                 unsigned int offset, avail;
 484                 unsigned int entry;
 485
 486                 offset = (unsigned int) (to & (priv->cache.page_size - 1));
 487                 avail  = priv->cache.page_size - offset;
 488
 489                 entry = ps3vram_cache_match(dev, to);
 490                 cached = CACHE_OFFSET + entry * priv->cache.page_size + offset;
 491
 492                 dev_dbg(&dev->core, "%s: to=%08x cached=%08x offset=%08x "
 493                         "avail=%08x count=%08x\n", __func__, (unsigned int)to,
 494                         cached, offset, avail, count);
 495
 496                 if (avail > count)
 497                         avail = count;
 498                 memcpy(priv->xdr_buf + cached, buf, avail);
 499
 500                 priv->cache.tags[entry].flags |= CACHE_PAGE_DIRTY;
 501
 502                 buf += avail;
 503                 count -= avail;
 504                 to += avail;
 505         }
 506
 507         *retlen = len;
 508         return 0;
 509 }
 510
 511 static int ps3vram_proc_show(struct seq_file *m, void *v)
 512 {
 513         struct ps3vram_priv *priv = m->private;
 514
 515         seq_printf(m, "hit:%u\nmiss:%u\n", priv->cache.hit, priv->cache.miss);
 516         return 0;
 517 }
 518
 519 static void ps3vram_proc_init(struct ps3_system_bus_device *dev)
 520 {
 521         struct ps3vram_priv *priv = ps3_system_bus_get_drvdata(dev);
 522         struct proc_dir_entry *pde;
 523
 524         pde = proc_create_single_data(DEVICE_NAME, 0444, NULL,
 525                         ps3vram_proc_show, priv);
 526         if (!pde)
 527                 dev_warn(&dev->core, "failed to create /proc entry\n");
 528 }
 529
 530 static struct bio *ps3vram_do_bio(struct ps3_system_bus_device *dev,
 531                                   struct bio *bio)
 532 {
 533         struct ps3vram_priv *priv = ps3_system_bus_get_drvdata(dev);
 534         int write = bio_data_dir(bio) == WRITE;
 535         const char *op = write ? "write" : "read";
 536         loff_t offset = bio->bi_iter.bi_sector << 9;
 537         blk_status_t error = 0;
 538         struct bio_vec bvec;
 539         struct bvec_iter iter;
 540         struct bio *next;
 541
 542         bio_for_each_segment(bvec, bio, iter) {
 543                 /* PS3 is ppc64, so we don't handle highmem */
 544                 char *ptr = page_address(bvec.bv_page) + bvec.bv_offset;
 545                 size_t len = bvec.bv_len, retlen;
 546
 547                 dev_dbg(&dev->core, "    %s %zu bytes at offset %llu\n", op,
 548                         len, offset);
 549                 if (write)
 550                         error = ps3vram_write(dev, offset, len, &retlen, ptr);
 551                 else
 552                         error = ps3vram_read(dev, offset, len, &retlen, ptr);
 553
 554                 if (error) {
 555                         dev_err(&dev->core, "%s failed\n", op);
 556                         goto out;
 557                 }
 558
 559                 if (retlen != len) {
 560                         dev_err(&dev->core, "Short %s\n", op);
 561                         error = BLK_STS_IOERR;
 562                         goto out;
 563                 }
 564
 565                 offset += len;
 566         }
 567
 568         dev_dbg(&dev->core, "%s completed\n", op);
 569
 570 out:
 571         spin_lock_irq(&priv->lock);
 572         bio_list_pop(&priv->list);
 573         next = bio_list_peek(&priv->list);
 574         spin_unlock_irq(&priv->lock);
 575
 576         bio->bi_status = error;
 577         bio_endio(bio);
 578         return next;
 579 }
 580
 581 static blk_qc_t ps3vram_submit_bio(struct bio *bio)
 582 {
 583         struct ps3_system_bus_device *dev = bio->bi_bdev->bd_disk->private_data;
 584         struct ps3vram_priv *priv = ps3_system_bus_get_drvdata(dev);
 585         int busy;
 586
 587         dev_dbg(&dev->core, "%s\n", __func__);
 588
 589         blk_queue_split(&bio);
 590
 591         spin_lock_irq(&priv->lock);
 592         busy = !bio_list_empty(&priv->list);
 593         bio_list_add(&priv->list, bio);
 594         spin_unlock_irq(&priv->lock);
 595
 596         if (busy)
 597                 return BLK_QC_T_NONE;
 598
 599         do {
 600                 bio = ps3vram_do_bio(dev, bio);
 601         } while (bio);
 602
 603         return BLK_QC_T_NONE;
 604 }
 605
 606 static const struct block_device_operations ps3vram_fops = {
 607         .owner          = THIS_MODULE,
 608         .submit_bio     = ps3vram_submit_bio,
 609 };
 610
 611 static int ps3vram_probe(struct ps3_system_bus_device *dev)
 612 {
 613         struct ps3vram_priv *priv;
 614         int error, status;
 615         struct gendisk *gendisk;
 616         u64 ddr_size, ddr_lpar, ctrl_lpar, info_lpar, reports_lpar,
 617             reports_size, xdr_lpar;
 618         char *rest;
 619
 620         priv = kzalloc(sizeof(*priv), GFP_KERNEL);
 621         if (!priv) {
 622                 error = -ENOMEM;
 623                 goto fail;
 624         }
 625
 626         spin_lock_init(&priv->lock);
 627         bio_list_init(&priv->list);
 628         ps3_system_bus_set_drvdata(dev, priv);
 629
 630         /* Allocate XDR buffer (1MiB aligned) */
 631         priv->xdr_buf = (void *)__get_free_pages(GFP_KERNEL,
 632                 get_order(XDR_BUF_SIZE));
 633         if (priv->xdr_buf == NULL) {
 634                 dev_err(&dev->core, "Could not allocate XDR buffer\n");
 635                 error = -ENOMEM;
 636                 goto fail_free_priv;
 637         }
 638
 639         /* Put FIFO at begginning of XDR buffer */
 640         priv->fifo_base = (u32 *) (priv->xdr_buf + FIFO_OFFSET);
 641         priv->fifo_ptr = priv->fifo_base;
 642
 643         /* XXX: Need to open GPU, in case ps3fb or snd_ps3 aren't loaded */
 644         if (ps3_open_hv_device(dev)) {
 645                 dev_err(&dev->core, "ps3_open_hv_device failed\n");
 646                 error = -EAGAIN;
 647                 goto out_free_xdr_buf;
 648         }
 649
 650         /* Request memory */
 651         status = -1;
 652         ddr_size = ALIGN(memparse(size, &rest), 1024*1024);
 653         if (!ddr_size) {
 654                 dev_err(&dev->core, "Specified size is too small\n");
 655                 error = -EINVAL;
 656                 goto out_close_gpu;
 657         }
 658
 659         while (ddr_size > 0) {
 660                 status = lv1_gpu_memory_allocate(ddr_size, 0, 0, 0, 0,
 661                                                  &priv->memory_handle,
 662                                                  &ddr_lpar);
 663                 if (!status)
 664                         break;
 665                 ddr_size -= 1024*1024;
 666         }
 667         if (status) {
 668                 dev_err(&dev->core, "lv1_gpu_memory_allocate failed %d\n",
 669                         status);
 670                 error = -ENOMEM;
 671                 goto out_close_gpu;
 672         }
 673
 674         /* Request context */
 675         status = lv1_gpu_context_allocate(priv->memory_handle, 0,
 676                                           &priv->context_handle, &ctrl_lpar,
 677                                           &info_lpar, &reports_lpar,
 678                                           &reports_size);
 679         if (status) {
 680                 dev_err(&dev->core, "lv1_gpu_context_allocate failed %d\n",
 681                         status);
 682                 error = -ENOMEM;
 683                 goto out_free_memory;
 684         }
 685
 686         /* Map XDR buffer to RSX */
 687         xdr_lpar = ps3_mm_phys_to_lpar(__pa(priv->xdr_buf));
 688         status = lv1_gpu_context_iomap(priv->context_handle, XDR_IOIF,
 689                                        xdr_lpar, XDR_BUF_SIZE,
 690                                        CBE_IOPTE_PP_W | CBE_IOPTE_PP_R |
 691                                        CBE_IOPTE_M);
 692         if (status) {
 693                 dev_err(&dev->core, "lv1_gpu_context_iomap failed %d\n",
 694                         status);
 695                 error = -ENOMEM;
 696                 goto out_free_context;
 697         }
 698
 699         priv->ctrl = ioremap(ctrl_lpar, 64 * 1024);
 700         if (!priv->ctrl) {
 701                 dev_err(&dev->core, "ioremap CTRL failed\n");
 702                 error = -ENOMEM;
 703                 goto out_unmap_context;
 704         }
 705
 706         priv->reports = ioremap(reports_lpar, reports_size);
 707         if (!priv->reports) {
 708                 dev_err(&dev->core, "ioremap REPORTS failed\n");
 709                 error = -ENOMEM;
 710                 goto out_unmap_ctrl;
 711         }
 712
 713         mutex_lock(&ps3_gpu_mutex);
 714         ps3vram_init_ring(dev);
 715         mutex_unlock(&ps3_gpu_mutex);
 716
 717         priv->size = ddr_size;
 718
 719         ps3vram_bind(dev);
 720
 721         mutex_lock(&ps3_gpu_mutex);
 722         error = ps3vram_wait_ring(dev, 100);
 723         mutex_unlock(&ps3_gpu_mutex);
 724         if (error < 0) {
 725                 dev_err(&dev->core, "Failed to initialize channels\n");
 726                 error = -ETIMEDOUT;
 727                 goto out_unmap_reports;
 728         }
 729
 730         error = ps3vram_cache_init(dev);
 731         if (error < 0) {
 732                 goto out_unmap_reports;
 733         }
 734
 735         ps3vram_proc_init(dev);
 736
 737         gendisk = blk_alloc_disk(NUMA_NO_NODE);
 738         if (!gendisk) {
 739                 dev_err(&dev->core, "blk_alloc_disk failed\n");
 740                 error = -ENOMEM;
 741                 goto out_cache_cleanup;
 742         }
 743
 744         priv->gendisk = gendisk;
 745         gendisk->major = ps3vram_major;
 746         gendisk->minors = 1;
 747         gendisk->fops = &ps3vram_fops;
 748         gendisk->private_data = dev;
 749         strlcpy(gendisk->disk_name, DEVICE_NAME, sizeof(gendisk->disk_name));
 750         set_capacity(gendisk, priv->size >> 9);
 751         blk_queue_max_segments(gendisk->queue, BLK_MAX_SEGMENTS);
 752         blk_queue_max_segment_size(gendisk->queue, BLK_MAX_SEGMENT_SIZE);
 753         blk_queue_max_hw_sectors(gendisk->queue, BLK_SAFE_MAX_SECTORS);
 754
 755         dev_info(&dev->core, "%s: Using %llu MiB of GPU memory\n",
 756                  gendisk->disk_name, get_capacity(gendisk) >> 11);
 757
 758         device_add_disk(&dev->core, gendisk, NULL);
 759         return 0;
 760
 761 out_cache_cleanup:
 762         remove_proc_entry(DEVICE_NAME, NULL);
 763         ps3vram_cache_cleanup(dev);
 764 out_unmap_reports:
 765         iounmap(priv->reports);
 766 out_unmap_ctrl:
 767         iounmap(priv->ctrl);
 768 out_unmap_context:
 769         lv1_gpu_context_iomap(priv->context_handle, XDR_IOIF, xdr_lpar,
 770                               XDR_BUF_SIZE, CBE_IOPTE_M);
 771 out_free_context:
 772         lv1_gpu_context_free(priv->context_handle);
 773 out_free_memory:
 774         lv1_gpu_memory_free(priv->memory_handle);
 775 out_close_gpu:
 776         ps3_close_hv_device(dev);
 777 out_free_xdr_buf:
 778         free_pages((unsigned long) priv->xdr_buf, get_order(XDR_BUF_SIZE));
 779 fail_free_priv:
 780         kfree(priv);
 781         ps3_system_bus_set_drvdata(dev, NULL);
 782 fail:
 783         return error;
 784 }
 785
 786 static void ps3vram_remove(struct ps3_system_bus_device *dev)
 787 {
 788         struct ps3vram_priv *priv = ps3_system_bus_get_drvdata(dev);
 789
 790         del_gendisk(priv->gendisk);
 791         blk_cleanup_disk(priv->gendisk);
 792         remove_proc_entry(DEVICE_NAME, NULL);
 793         ps3vram_cache_cleanup(dev);
 794         iounmap(priv->reports);
 795         iounmap(priv->ctrl);
 796         lv1_gpu_context_iomap(priv->context_handle, XDR_IOIF,
 797                               ps3_mm_phys_to_lpar(__pa(priv->xdr_buf)),
 798                               XDR_BUF_SIZE, CBE_IOPTE_M);
 799         lv1_gpu_context_free(priv->context_handle);
 800         lv1_gpu_memory_free(priv->memory_handle);
 801         ps3_close_hv_device(dev);
 802         free_pages((unsigned long) priv->xdr_buf, get_order(XDR_BUF_SIZE));
 803         kfree(priv);
 804         ps3_system_bus_set_drvdata(dev, NULL);
 805 }
 806
 807 static struct ps3_system_bus_driver ps3vram = {
 808         .match_id       = PS3_MATCH_ID_GPU,
 809         .match_sub_id   = PS3_MATCH_SUB_ID_GPU_RAMDISK,
 810         .core.name      = DEVICE_NAME,
 811         .core.owner     = THIS_MODULE,
 812         .probe          = ps3vram_probe,
 813         .remove         = ps3vram_remove,
 814         .shutdown       = ps3vram_remove,
 815 };
 816
 817
 818 static int __init ps3vram_init(void)
 819 {
 820         int error;
 821
 822         if (!firmware_has_feature(FW_FEATURE_PS3_LV1))
 823                 return -ENODEV;
 824
 825         error = register_blkdev(0, DEVICE_NAME);
 826         if (error <= 0) {
 827                 pr_err("%s: register_blkdev failed %d\n", DEVICE_NAME, error);
 828                 return error;
 829         }
 830         ps3vram_major = error;
 831
 832         pr_info("%s: registered block device major %d\n", DEVICE_NAME,
 833                 ps3vram_major);
 834
 835         error = ps3_system_bus_driver_register(&ps3vram);
 836         if (error)
 837                 unregister_blkdev(ps3vram_major, DEVICE_NAME);
 838
 839         return error;
 840 }
 841
 842 static void __exit ps3vram_exit(void)
 843 {
 844         ps3_system_bus_driver_unregister(&ps3vram);
 845         unregister_blkdev(ps3vram_major, DEVICE_NAME);
 846 }
 847
 848 module_init(ps3vram_init);
 849 module_exit(ps3vram_exit);
 850
 851 MODULE_LICENSE("GPL");
 852 MODULE_DESCRIPTION("PS3 Video RAM Storage Driver");
 853 MODULE_AUTHOR("Sony Corporation");
 854 MODULE_ALIAS(PS3_MODULE_ALIAS_GPU_RAMDISK);