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 request_queue *queue;
  71         struct gendisk *gendisk;
  72
  73         u64 size;
  74
  75         u64 memory_handle;
  76         u64 context_handle;
  77         u32 __iomem *ctrl;
  78         void __iomem *reports;
  79         u8 *xdr_buf;
  80
  81         u32 *fifo_base;
  82         u32 *fifo_ptr;
  83
  84         struct ps3vram_cache cache;
  85
  86         spinlock_t lock;        /* protecting list of bios */
  87         struct bio_list list;
  88 };
  89
  90
  91 static int ps3vram_major;
  92
  93
  94 static const struct block_device_operations ps3vram_fops = {
  95         .owner          = THIS_MODULE,
  96 };
  97
  98
  99 #define DMA_NOTIFIER_HANDLE_BASE 0x66604200 /* first DMA notifier handle */
 100 #define DMA_NOTIFIER_OFFSET_BASE 0x1000     /* first DMA notifier offset */
 101 #define DMA_NOTIFIER_SIZE        0x40
 102 #define NOTIFIER 7      /* notifier used for completion report */
 103
 104 static char *size = "256M";
 105 module_param(size, charp, 0);
 106 MODULE_PARM_DESC(size, "memory size");
 107
 108 static u32 __iomem *ps3vram_get_notifier(void __iomem *reports, int notifier)
 109 {
 110         return reports + DMA_NOTIFIER_OFFSET_BASE +
 111                DMA_NOTIFIER_SIZE * notifier;
 112 }
 113
 114 static void ps3vram_notifier_reset(struct ps3_system_bus_device *dev)
 115 {
 116         struct ps3vram_priv *priv = ps3_system_bus_get_drvdata(dev);
 117         u32 __iomem *notify = ps3vram_get_notifier(priv->reports, NOTIFIER);
 118         int i;
 119
 120         for (i = 0; i < 4; i++)
 121                 iowrite32be(0xffffffff, notify + i);
 122 }
 123
 124 static int ps3vram_notifier_wait(struct ps3_system_bus_device *dev,
 125                                  unsigned int timeout_ms)
 126 {
 127         struct ps3vram_priv *priv = ps3_system_bus_get_drvdata(dev);
 128         u32 __iomem *notify = ps3vram_get_notifier(priv->reports, NOTIFIER);
 129         unsigned long timeout;
 130
 131         for (timeout = 20; timeout; timeout--) {
 132                 if (!ioread32be(notify + 3))
 133                         return 0;
 134                 udelay(10);
 135         }
 136
 137         timeout = jiffies + msecs_to_jiffies(timeout_ms);
 138
 139         do {
 140                 if (!ioread32be(notify + 3))
 141                         return 0;
 142                 msleep(1);
 143         } while (time_before(jiffies, timeout));
 144
 145         return -ETIMEDOUT;
 146 }
 147
 148 static void ps3vram_init_ring(struct ps3_system_bus_device *dev)
 149 {
 150         struct ps3vram_priv *priv = ps3_system_bus_get_drvdata(dev);
 151
 152         iowrite32be(FIFO_BASE + FIFO_OFFSET, priv->ctrl + CTRL_PUT);
 153         iowrite32be(FIFO_BASE + FIFO_OFFSET, priv->ctrl + CTRL_GET);
 154 }
 155
 156 static int ps3vram_wait_ring(struct ps3_system_bus_device *dev,
 157                              unsigned int timeout_ms)
 158 {
 159         struct ps3vram_priv *priv = ps3_system_bus_get_drvdata(dev);
 160         unsigned long timeout = jiffies + msecs_to_jiffies(timeout_ms);
 161
 162         do {
 163                 if (ioread32be(priv->ctrl + CTRL_PUT) == ioread32be(priv->ctrl + CTRL_GET))
 164                         return 0;
 165                 msleep(1);
 166         } while (time_before(jiffies, timeout));
 167
 168         dev_warn(&dev->core, "FIFO timeout (%08x/%08x/%08x)\n",
 169                  ioread32be(priv->ctrl + CTRL_PUT), ioread32be(priv->ctrl + CTRL_GET),
 170                  ioread32be(priv->ctrl + CTRL_TOP));
 171
 172         return -ETIMEDOUT;
 173 }
 174
 175 static void ps3vram_out_ring(struct ps3vram_priv *priv, u32 data)
 176 {
 177         *(priv->fifo_ptr)++ = data;
 178 }
 179
 180 static void ps3vram_begin_ring(struct ps3vram_priv *priv, u32 chan, u32 tag,
 181                                u32 size)
 182 {
 183         ps3vram_out_ring(priv, (size << 18) | (chan << 13) | tag);
 184 }
 185
 186 static void ps3vram_rewind_ring(struct ps3_system_bus_device *dev)
 187 {
 188         struct ps3vram_priv *priv = ps3_system_bus_get_drvdata(dev);
 189         int status;
 190
 191         ps3vram_out_ring(priv, 0x20000000 | (FIFO_BASE + FIFO_OFFSET));
 192
 193         iowrite32be(FIFO_BASE + FIFO_OFFSET, priv->ctrl + CTRL_PUT);
 194
 195         /* asking the HV for a blit will kick the FIFO */
 196         status = lv1_gpu_fb_blit(priv->context_handle, 0, 0, 0, 0);
 197         if (status)
 198                 dev_err(&dev->core, "%s: lv1_gpu_fb_blit failed %d\n",
 199                         __func__, status);
 200
 201         priv->fifo_ptr = priv->fifo_base;
 202 }
 203
 204 static void ps3vram_fire_ring(struct ps3_system_bus_device *dev)
 205 {
 206         struct ps3vram_priv *priv = ps3_system_bus_get_drvdata(dev);
 207         int status;
 208
 209         mutex_lock(&ps3_gpu_mutex);
 210
 211         iowrite32be(FIFO_BASE + FIFO_OFFSET + (priv->fifo_ptr - priv->fifo_base)
 212                 * sizeof(u32), priv->ctrl + CTRL_PUT);
 213
 214         /* asking the HV for a blit will kick the FIFO */
 215         status = lv1_gpu_fb_blit(priv->context_handle, 0, 0, 0, 0);
 216         if (status)
 217                 dev_err(&dev->core, "%s: lv1_gpu_fb_blit failed %d\n",
 218                         __func__, status);
 219
 220         if ((priv->fifo_ptr - priv->fifo_base) * sizeof(u32) >
 221             FIFO_SIZE - 1024) {
 222                 dev_dbg(&dev->core, "FIFO full, rewinding\n");
 223                 ps3vram_wait_ring(dev, 200);
 224                 ps3vram_rewind_ring(dev);
 225         }
 226
 227         mutex_unlock(&ps3_gpu_mutex);
 228 }
 229
 230 static void ps3vram_bind(struct ps3_system_bus_device *dev)
 231 {
 232         struct ps3vram_priv *priv = ps3_system_bus_get_drvdata(dev);
 233
 234         ps3vram_begin_ring(priv, UPLOAD_SUBCH, 0, 1);
 235         ps3vram_out_ring(priv, 0x31337303);
 236         ps3vram_begin_ring(priv, UPLOAD_SUBCH, 0x180, 3);
 237         ps3vram_out_ring(priv, DMA_NOTIFIER_HANDLE_BASE + NOTIFIER);
 238         ps3vram_out_ring(priv, 0xfeed0001);     /* DMA system RAM instance */
 239         ps3vram_out_ring(priv, 0xfeed0000);     /* DMA video RAM instance */
 240
 241         ps3vram_begin_ring(priv, DOWNLOAD_SUBCH, 0, 1);
 242         ps3vram_out_ring(priv, 0x3137c0de);
 243         ps3vram_begin_ring(priv, DOWNLOAD_SUBCH, 0x180, 3);
 244         ps3vram_out_ring(priv, DMA_NOTIFIER_HANDLE_BASE + NOTIFIER);
 245         ps3vram_out_ring(priv, 0xfeed0000);     /* DMA video RAM instance */
 246         ps3vram_out_ring(priv, 0xfeed0001);     /* DMA system RAM instance */
 247
 248         ps3vram_fire_ring(dev);
 249 }
 250
 251 static int ps3vram_upload(struct ps3_system_bus_device *dev,
 252                           unsigned int src_offset, unsigned int dst_offset,
 253                           int len, int count)
 254 {
 255         struct ps3vram_priv *priv = ps3_system_bus_get_drvdata(dev);
 256
 257         ps3vram_begin_ring(priv, UPLOAD_SUBCH,
 258                            NV_MEMORY_TO_MEMORY_FORMAT_OFFSET_IN, 8);
 259         ps3vram_out_ring(priv, XDR_IOIF + src_offset);
 260         ps3vram_out_ring(priv, dst_offset);
 261         ps3vram_out_ring(priv, len);
 262         ps3vram_out_ring(priv, len);
 263         ps3vram_out_ring(priv, len);
 264         ps3vram_out_ring(priv, count);
 265         ps3vram_out_ring(priv, (1 << 8) | 1);
 266         ps3vram_out_ring(priv, 0);
 267
 268         ps3vram_notifier_reset(dev);
 269         ps3vram_begin_ring(priv, UPLOAD_SUBCH,
 270                            NV_MEMORY_TO_MEMORY_FORMAT_NOTIFY, 1);
 271         ps3vram_out_ring(priv, 0);
 272         ps3vram_begin_ring(priv, UPLOAD_SUBCH, 0x100, 1);
 273         ps3vram_out_ring(priv, 0);
 274         ps3vram_fire_ring(dev);
 275         if (ps3vram_notifier_wait(dev, 200) < 0) {
 276                 dev_warn(&dev->core, "%s: Notifier timeout\n", __func__);
 277                 return -1;
 278         }
 279
 280         return 0;
 281 }
 282
 283 static int ps3vram_download(struct ps3_system_bus_device *dev,
 284                             unsigned int src_offset, unsigned int dst_offset,
 285                             int len, int count)
 286 {
 287         struct ps3vram_priv *priv = ps3_system_bus_get_drvdata(dev);
 288
 289         ps3vram_begin_ring(priv, DOWNLOAD_SUBCH,
 290                            NV_MEMORY_TO_MEMORY_FORMAT_OFFSET_IN, 8);
 291         ps3vram_out_ring(priv, src_offset);
 292         ps3vram_out_ring(priv, XDR_IOIF + dst_offset);
 293         ps3vram_out_ring(priv, len);
 294         ps3vram_out_ring(priv, len);
 295         ps3vram_out_ring(priv, len);
 296         ps3vram_out_ring(priv, count);
 297         ps3vram_out_ring(priv, (1 << 8) | 1);
 298         ps3vram_out_ring(priv, 0);
 299
 300         ps3vram_notifier_reset(dev);
 301         ps3vram_begin_ring(priv, DOWNLOAD_SUBCH,
 302                            NV_MEMORY_TO_MEMORY_FORMAT_NOTIFY, 1);
 303         ps3vram_out_ring(priv, 0);
 304         ps3vram_begin_ring(priv, DOWNLOAD_SUBCH, 0x100, 1);
 305         ps3vram_out_ring(priv, 0);
 306         ps3vram_fire_ring(dev);
 307         if (ps3vram_notifier_wait(dev, 200) < 0) {
 308                 dev_warn(&dev->core, "%s: Notifier timeout\n", __func__);
 309                 return -1;
 310         }
 311
 312         return 0;
 313 }
 314
 315 static void ps3vram_cache_evict(struct ps3_system_bus_device *dev, int entry)
 316 {
 317         struct ps3vram_priv *priv = ps3_system_bus_get_drvdata(dev);
 318         struct ps3vram_cache *cache = &priv->cache;
 319
 320         if (!(cache->tags[entry].flags & CACHE_PAGE_DIRTY))
 321                 return;
 322
 323         dev_dbg(&dev->core, "Flushing %d: 0x%08x\n", entry,
 324                 cache->tags[entry].address);
 325         if (ps3vram_upload(dev, CACHE_OFFSET + entry * cache->page_size,
 326                            cache->tags[entry].address, DMA_PAGE_SIZE,
 327                            cache->page_size / DMA_PAGE_SIZE) < 0) {
 328                 dev_err(&dev->core,
 329                         "Failed to upload from 0x%x to " "0x%x size 0x%x\n",
 330                         entry * cache->page_size, cache->tags[entry].address,
 331                         cache->page_size);
 332         }
 333         cache->tags[entry].flags &= ~CACHE_PAGE_DIRTY;
 334 }
 335
 336 static void ps3vram_cache_load(struct ps3_system_bus_device *dev, int entry,
 337                                unsigned int address)
 338 {
 339         struct ps3vram_priv *priv = ps3_system_bus_get_drvdata(dev);
 340         struct ps3vram_cache *cache = &priv->cache;
 341
 342         dev_dbg(&dev->core, "Fetching %d: 0x%08x\n", entry, address);
 343         if (ps3vram_download(dev, address,
 344                              CACHE_OFFSET + entry * cache->page_size,
 345                              DMA_PAGE_SIZE,
 346                              cache->page_size / DMA_PAGE_SIZE) < 0) {
 347                 dev_err(&dev->core,
 348                         "Failed to download from 0x%x to 0x%x size 0x%x\n",
 349                         address, entry * cache->page_size, cache->page_size);
 350         }
 351
 352         cache->tags[entry].address = address;
 353         cache->tags[entry].flags |= CACHE_PAGE_PRESENT;
 354 }
 355
 356
 357 static void ps3vram_cache_flush(struct ps3_system_bus_device *dev)
 358 {
 359         struct ps3vram_priv *priv = ps3_system_bus_get_drvdata(dev);
 360         struct ps3vram_cache *cache = &priv->cache;
 361         int i;
 362
 363         dev_dbg(&dev->core, "FLUSH\n");
 364         for (i = 0; i < cache->page_count; i++) {
 365                 ps3vram_cache_evict(dev, i);
 366                 cache->tags[i].flags = 0;
 367         }
 368 }
 369
 370 static unsigned int ps3vram_cache_match(struct ps3_system_bus_device *dev,
 371                                         loff_t address)
 372 {
 373         struct ps3vram_priv *priv = ps3_system_bus_get_drvdata(dev);
 374         struct ps3vram_cache *cache = &priv->cache;
 375         unsigned int base;
 376         unsigned int offset;
 377         int i;
 378         static int counter;
 379
 380         offset = (unsigned int) (address & (cache->page_size - 1));
 381         base = (unsigned int) (address - offset);
 382
 383         /* fully associative check */
 384         for (i = 0; i < cache->page_count; i++) {
 385                 if ((cache->tags[i].flags & CACHE_PAGE_PRESENT) &&
 386                     cache->tags[i].address == base) {
 387                         cache->hit++;
 388                         dev_dbg(&dev->core, "Found entry %d: 0x%08x\n", i,
 389                                 cache->tags[i].address);
 390                         return i;
 391                 }
 392         }
 393
 394         /* choose a random entry */
 395         i = (jiffies + (counter++)) % cache->page_count;
 396         dev_dbg(&dev->core, "Using entry %d\n", i);
 397
 398         ps3vram_cache_evict(dev, i);
 399         ps3vram_cache_load(dev, i, base);
 400
 401         cache->miss++;
 402         return i;
 403 }
 404
 405 static int ps3vram_cache_init(struct ps3_system_bus_device *dev)
 406 {
 407         struct ps3vram_priv *priv = ps3_system_bus_get_drvdata(dev);
 408
 409         priv->cache.page_count = CACHE_PAGE_COUNT;
 410         priv->cache.page_size = CACHE_PAGE_SIZE;
 411         priv->cache.tags = kcalloc(CACHE_PAGE_COUNT,
 412                                    sizeof(struct ps3vram_tag),
 413                                    GFP_KERNEL);
 414         if (!priv->cache.tags)
 415                 return -ENOMEM;
 416
 417         dev_info(&dev->core, "Created ram cache: %d entries, %d KiB each\n",
 418                 CACHE_PAGE_COUNT, CACHE_PAGE_SIZE / 1024);
 419
 420         return 0;
 421 }
 422
 423 static void ps3vram_cache_cleanup(struct ps3_system_bus_device *dev)
 424 {
 425         struct ps3vram_priv *priv = ps3_system_bus_get_drvdata(dev);
 426
 427         ps3vram_cache_flush(dev);
 428         kfree(priv->cache.tags);
 429 }
 430
 431 static blk_status_t ps3vram_read(struct ps3_system_bus_device *dev, loff_t from,
 432                         size_t len, size_t *retlen, u_char *buf)
 433 {
 434         struct ps3vram_priv *priv = ps3_system_bus_get_drvdata(dev);
 435         unsigned int cached, count;
 436
 437         dev_dbg(&dev->core, "%s: from=0x%08x len=0x%zx\n", __func__,
 438                 (unsigned int)from, len);
 439
 440         if (from >= priv->size)
 441                 return BLK_STS_IOERR;
 442
 443         if (len > priv->size - from)
 444                 len = priv->size - from;
 445
 446         /* Copy from vram to buf */
 447         count = len;
 448         while (count) {
 449                 unsigned int offset, avail;
 450                 unsigned int entry;
 451
 452                 offset = (unsigned int) (from & (priv->cache.page_size - 1));
 453                 avail  = priv->cache.page_size - offset;
 454
 455                 entry = ps3vram_cache_match(dev, from);
 456                 cached = CACHE_OFFSET + entry * priv->cache.page_size + offset;
 457
 458                 dev_dbg(&dev->core, "%s: from=%08x cached=%08x offset=%08x "
 459                         "avail=%08x count=%08x\n", __func__,
 460                         (unsigned int)from, cached, offset, avail, count);
 461
 462                 if (avail > count)
 463                         avail = count;
 464                 memcpy(buf, priv->xdr_buf + cached, avail);
 465
 466                 buf += avail;
 467                 count -= avail;
 468                 from += avail;
 469         }
 470
 471         *retlen = len;
 472         return 0;
 473 }
 474
 475 static blk_status_t ps3vram_write(struct ps3_system_bus_device *dev, loff_t to,
 476                          size_t len, size_t *retlen, const u_char *buf)
 477 {
 478         struct ps3vram_priv *priv = ps3_system_bus_get_drvdata(dev);
 479         unsigned int cached, count;
 480
 481         if (to >= priv->size)
 482                 return BLK_STS_IOERR;
 483
 484         if (len > priv->size - to)
 485                 len = priv->size - to;
 486
 487         /* Copy from buf to vram */
 488         count = len;
 489         while (count) {
 490                 unsigned int offset, avail;
 491                 unsigned int entry;
 492
 493                 offset = (unsigned int) (to & (priv->cache.page_size - 1));
 494                 avail  = priv->cache.page_size - offset;
 495
 496                 entry = ps3vram_cache_match(dev, to);
 497                 cached = CACHE_OFFSET + entry * priv->cache.page_size + offset;
 498
 499                 dev_dbg(&dev->core, "%s: to=%08x cached=%08x offset=%08x "
 500                         "avail=%08x count=%08x\n", __func__, (unsigned int)to,
 501                         cached, offset, avail, count);
 502
 503                 if (avail > count)
 504                         avail = count;
 505                 memcpy(priv->xdr_buf + cached, buf, avail);
 506
 507                 priv->cache.tags[entry].flags |= CACHE_PAGE_DIRTY;
 508
 509                 buf += avail;
 510                 count -= avail;
 511                 to += avail;
 512         }
 513
 514         *retlen = len;
 515         return 0;
 516 }
 517
 518 static int ps3vram_proc_show(struct seq_file *m, void *v)
 519 {
 520         struct ps3vram_priv *priv = m->private;
 521
 522         seq_printf(m, "hit:%u\nmiss:%u\n", priv->cache.hit, priv->cache.miss);
 523         return 0;
 524 }
 525
 526 static void ps3vram_proc_init(struct ps3_system_bus_device *dev)
 527 {
 528         struct ps3vram_priv *priv = ps3_system_bus_get_drvdata(dev);
 529         struct proc_dir_entry *pde;
 530
 531         pde = proc_create_single_data(DEVICE_NAME, 0444, NULL,
 532                         ps3vram_proc_show, priv);
 533         if (!pde)
 534                 dev_warn(&dev->core, "failed to create /proc entry\n");
 535 }
 536
 537 static struct bio *ps3vram_do_bio(struct ps3_system_bus_device *dev,
 538                                   struct bio *bio)
 539 {
 540         struct ps3vram_priv *priv = ps3_system_bus_get_drvdata(dev);
 541         int write = bio_data_dir(bio) == WRITE;
 542         const char *op = write ? "write" : "read";
 543         loff_t offset = bio->bi_iter.bi_sector << 9;
 544         blk_status_t error = 0;
 545         struct bio_vec bvec;
 546         struct bvec_iter iter;
 547         struct bio *next;
 548
 549         bio_for_each_segment(bvec, bio, iter) {
 550                 /* PS3 is ppc64, so we don't handle highmem */
 551                 char *ptr = page_address(bvec.bv_page) + bvec.bv_offset;
 552                 size_t len = bvec.bv_len, retlen;
 553
 554                 dev_dbg(&dev->core, "    %s %zu bytes at offset %llu\n", op,
 555                         len, offset);
 556                 if (write)
 557                         error = ps3vram_write(dev, offset, len, &retlen, ptr);
 558                 else
 559                         error = ps3vram_read(dev, offset, len, &retlen, ptr);
 560
 561                 if (error) {
 562                         dev_err(&dev->core, "%s failed\n", op);
 563                         goto out;
 564                 }
 565
 566                 if (retlen != len) {
 567                         dev_err(&dev->core, "Short %s\n", op);
 568                         error = BLK_STS_IOERR;
 569                         goto out;
 570                 }
 571
 572                 offset += len;
 573         }
 574
 575         dev_dbg(&dev->core, "%s completed\n", op);
 576
 577 out:
 578         spin_lock_irq(&priv->lock);
 579         bio_list_pop(&priv->list);
 580         next = bio_list_peek(&priv->list);
 581         spin_unlock_irq(&priv->lock);
 582
 583         bio->bi_status = error;
 584         bio_endio(bio);
 585         return next;
 586 }
 587
 588 static blk_qc_t ps3vram_make_request(struct request_queue *q, struct bio *bio)
 589 {
 590         struct ps3_system_bus_device *dev = q->queuedata;
 591         struct ps3vram_priv *priv = ps3_system_bus_get_drvdata(dev);
 592         int busy;
 593
 594         dev_dbg(&dev->core, "%s\n", __func__);
 595
 596         blk_queue_split(q, &bio);
 597
 598         spin_lock_irq(&priv->lock);
 599         busy = !bio_list_empty(&priv->list);
 600         bio_list_add(&priv->list, bio);
 601         spin_unlock_irq(&priv->lock);
 602
 603         if (busy)
 604                 return BLK_QC_T_NONE;
 605
 606         do {
 607                 bio = ps3vram_do_bio(dev, bio);
 608         } while (bio);
 609
 610         return BLK_QC_T_NONE;
 611 }
 612
 613 static int ps3vram_probe(struct ps3_system_bus_device *dev)
 614 {
 615         struct ps3vram_priv *priv;
 616         int error, status;
 617         struct request_queue *queue;
 618         struct gendisk *gendisk;
 619         u64 ddr_size, ddr_lpar, ctrl_lpar, info_lpar, reports_lpar,
 620             reports_size, xdr_lpar;
 621         char *rest;
 622
 623         priv = kzalloc(sizeof(*priv), GFP_KERNEL);
 624         if (!priv) {
 625                 error = -ENOMEM;
 626                 goto fail;
 627         }
 628
 629         spin_lock_init(&priv->lock);
 630         bio_list_init(&priv->list);
 631         ps3_system_bus_set_drvdata(dev, priv);
 632
 633         /* Allocate XDR buffer (1MiB aligned) */
 634         priv->xdr_buf = (void *)__get_free_pages(GFP_KERNEL,
 635                 get_order(XDR_BUF_SIZE));
 636         if (priv->xdr_buf == NULL) {
 637                 dev_err(&dev->core, "Could not allocate XDR buffer\n");
 638                 error = -ENOMEM;
 639                 goto fail_free_priv;
 640         }
 641
 642         /* Put FIFO at begginning of XDR buffer */
 643         priv->fifo_base = (u32 *) (priv->xdr_buf + FIFO_OFFSET);
 644         priv->fifo_ptr = priv->fifo_base;
 645
 646         /* XXX: Need to open GPU, in case ps3fb or snd_ps3 aren't loaded */
 647         if (ps3_open_hv_device(dev)) {
 648                 dev_err(&dev->core, "ps3_open_hv_device failed\n");
 649                 error = -EAGAIN;
 650                 goto out_free_xdr_buf;
 651         }
 652
 653         /* Request memory */
 654         status = -1;
 655         ddr_size = ALIGN(memparse(size, &rest), 1024*1024);
 656         if (!ddr_size) {
 657                 dev_err(&dev->core, "Specified size is too small\n");
 658                 error = -EINVAL;
 659                 goto out_close_gpu;
 660         }
 661
 662         while (ddr_size > 0) {
 663                 status = lv1_gpu_memory_allocate(ddr_size, 0, 0, 0, 0,
 664                                                  &priv->memory_handle,
 665                                                  &ddr_lpar);
 666                 if (!status)
 667                         break;
 668                 ddr_size -= 1024*1024;
 669         }
 670         if (status) {
 671                 dev_err(&dev->core, "lv1_gpu_memory_allocate failed %d\n",
 672                         status);
 673                 error = -ENOMEM;
 674                 goto out_close_gpu;
 675         }
 676
 677         /* Request context */
 678         status = lv1_gpu_context_allocate(priv->memory_handle, 0,
 679                                           &priv->context_handle, &ctrl_lpar,
 680                                           &info_lpar, &reports_lpar,
 681                                           &reports_size);
 682         if (status) {
 683                 dev_err(&dev->core, "lv1_gpu_context_allocate failed %d\n",
 684                         status);
 685                 error = -ENOMEM;
 686                 goto out_free_memory;
 687         }
 688
 689         /* Map XDR buffer to RSX */
 690         xdr_lpar = ps3_mm_phys_to_lpar(__pa(priv->xdr_buf));
 691         status = lv1_gpu_context_iomap(priv->context_handle, XDR_IOIF,
 692                                        xdr_lpar, XDR_BUF_SIZE,
 693                                        CBE_IOPTE_PP_W | CBE_IOPTE_PP_R |
 694                                        CBE_IOPTE_M);
 695         if (status) {
 696                 dev_err(&dev->core, "lv1_gpu_context_iomap failed %d\n",
 697                         status);
 698                 error = -ENOMEM;
 699                 goto out_free_context;
 700         }
 701
 702         priv->ctrl = ioremap(ctrl_lpar, 64 * 1024);
 703         if (!priv->ctrl) {
 704                 dev_err(&dev->core, "ioremap CTRL failed\n");
 705                 error = -ENOMEM;
 706                 goto out_unmap_context;
 707         }
 708
 709         priv->reports = ioremap(reports_lpar, reports_size);
 710         if (!priv->reports) {
 711                 dev_err(&dev->core, "ioremap REPORTS failed\n");
 712                 error = -ENOMEM;
 713                 goto out_unmap_ctrl;
 714         }
 715
 716         mutex_lock(&ps3_gpu_mutex);
 717         ps3vram_init_ring(dev);
 718         mutex_unlock(&ps3_gpu_mutex);
 719
 720         priv->size = ddr_size;
 721
 722         ps3vram_bind(dev);
 723
 724         mutex_lock(&ps3_gpu_mutex);
 725         error = ps3vram_wait_ring(dev, 100);
 726         mutex_unlock(&ps3_gpu_mutex);
 727         if (error < 0) {
 728                 dev_err(&dev->core, "Failed to initialize channels\n");
 729                 error = -ETIMEDOUT;
 730                 goto out_unmap_reports;
 731         }
 732
 733         error = ps3vram_cache_init(dev);
 734         if (error < 0) {
 735                 goto out_unmap_reports;
 736         }
 737
 738         ps3vram_proc_init(dev);
 739
 740         queue = blk_alloc_queue(GFP_KERNEL);
 741         if (!queue) {
 742                 dev_err(&dev->core, "blk_alloc_queue failed\n");
 743                 error = -ENOMEM;
 744                 goto out_cache_cleanup;
 745         }
 746
 747         priv->queue = queue;
 748         queue->queuedata = dev;
 749         blk_queue_make_request(queue, ps3vram_make_request);
 750         blk_queue_max_segments(queue, BLK_MAX_SEGMENTS);
 751         blk_queue_max_segment_size(queue, BLK_MAX_SEGMENT_SIZE);
 752         blk_queue_max_hw_sectors(queue, BLK_SAFE_MAX_SECTORS);
 753
 754         gendisk = alloc_disk(1);
 755         if (!gendisk) {
 756                 dev_err(&dev->core, "alloc_disk failed\n");
 757                 error = -ENOMEM;
 758                 goto fail_cleanup_queue;
 759         }
 760
 761         priv->gendisk = gendisk;
 762         gendisk->major = ps3vram_major;
 763         gendisk->first_minor = 0;
 764         gendisk->fops = &ps3vram_fops;
 765         gendisk->queue = queue;
 766         gendisk->private_data = dev;
 767         strlcpy(gendisk->disk_name, DEVICE_NAME, sizeof(gendisk->disk_name));
 768         set_capacity(gendisk, priv->size >> 9);
 769
 770         dev_info(&dev->core, "%s: Using %llu MiB of GPU memory\n",
 771                  gendisk->disk_name, get_capacity(gendisk) >> 11);
 772
 773         device_add_disk(&dev->core, gendisk, NULL);
 774         return 0;
 775
 776 fail_cleanup_queue:
 777         blk_cleanup_queue(queue);
 778 out_cache_cleanup:
 779         remove_proc_entry(DEVICE_NAME, NULL);
 780         ps3vram_cache_cleanup(dev);
 781 out_unmap_reports:
 782         iounmap(priv->reports);
 783 out_unmap_ctrl:
 784         iounmap(priv->ctrl);
 785 out_unmap_context:
 786         lv1_gpu_context_iomap(priv->context_handle, XDR_IOIF, xdr_lpar,
 787                               XDR_BUF_SIZE, CBE_IOPTE_M);
 788 out_free_context:
 789         lv1_gpu_context_free(priv->context_handle);
 790 out_free_memory:
 791         lv1_gpu_memory_free(priv->memory_handle);
 792 out_close_gpu:
 793         ps3_close_hv_device(dev);
 794 out_free_xdr_buf:
 795         free_pages((unsigned long) priv->xdr_buf, get_order(XDR_BUF_SIZE));
 796 fail_free_priv:
 797         kfree(priv);
 798         ps3_system_bus_set_drvdata(dev, NULL);
 799 fail:
 800         return error;
 801 }
 802
 803 static int ps3vram_remove(struct ps3_system_bus_device *dev)
 804 {
 805         struct ps3vram_priv *priv = ps3_system_bus_get_drvdata(dev);
 806
 807         del_gendisk(priv->gendisk);
 808         put_disk(priv->gendisk);
 809         blk_cleanup_queue(priv->queue);
 810         remove_proc_entry(DEVICE_NAME, NULL);
 811         ps3vram_cache_cleanup(dev);
 812         iounmap(priv->reports);
 813         iounmap(priv->ctrl);
 814         lv1_gpu_context_iomap(priv->context_handle, XDR_IOIF,
 815                               ps3_mm_phys_to_lpar(__pa(priv->xdr_buf)),
 816                               XDR_BUF_SIZE, CBE_IOPTE_M);
 817         lv1_gpu_context_free(priv->context_handle);
 818         lv1_gpu_memory_free(priv->memory_handle);
 819         ps3_close_hv_device(dev);
 820         free_pages((unsigned long) priv->xdr_buf, get_order(XDR_BUF_SIZE));
 821         kfree(priv);
 822         ps3_system_bus_set_drvdata(dev, NULL);
 823         return 0;
 824 }
 825
 826 static struct ps3_system_bus_driver ps3vram = {
 827         .match_id       = PS3_MATCH_ID_GPU,
 828         .match_sub_id   = PS3_MATCH_SUB_ID_GPU_RAMDISK,
 829         .core.name      = DEVICE_NAME,
 830         .core.owner     = THIS_MODULE,
 831         .probe          = ps3vram_probe,
 832         .remove         = ps3vram_remove,
 833         .shutdown       = ps3vram_remove,
 834 };
 835
 836
 837 static int __init ps3vram_init(void)
 838 {
 839         int error;
 840
 841         if (!firmware_has_feature(FW_FEATURE_PS3_LV1))
 842                 return -ENODEV;
 843
 844         error = register_blkdev(0, DEVICE_NAME);
 845         if (error <= 0) {
 846                 pr_err("%s: register_blkdev failed %d\n", DEVICE_NAME, error);
 847                 return error;
 848         }
 849         ps3vram_major = error;
 850
 851         pr_info("%s: registered block device major %d\n", DEVICE_NAME,
 852                 ps3vram_major);
 853
 854         error = ps3_system_bus_driver_register(&ps3vram);
 855         if (error)
 856                 unregister_blkdev(ps3vram_major, DEVICE_NAME);
 857
 858         return error;
 859 }
 860
 861 static void __exit ps3vram_exit(void)
 862 {
 863         ps3_system_bus_driver_unregister(&ps3vram);
 864         unregister_blkdev(ps3vram_major, DEVICE_NAME);
 865 }
 866
 867 module_init(ps3vram_init);
 868 module_exit(ps3vram_exit);
 869
 870 MODULE_LICENSE("GPL");
 871 MODULE_DESCRIPTION("PS3 Video RAM Storage Driver");
 872 MODULE_AUTHOR("Sony Corporation");
 873 MODULE_ALIAS(PS3_MODULE_ALIAS_GPU_RAMDISK);