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 #define DMA_NOTIFIER_HANDLE_BASE 0x66604200 /* first DMA notifier handle */
  94 #define DMA_NOTIFIER_OFFSET_BASE 0x1000     /* first DMA notifier offset */
  95 #define DMA_NOTIFIER_SIZE        0x40
  96 #define NOTIFIER 7      /* notifier used for completion report */
  97
  98 static char *size = "256M";
  99 module_param(size, charp, 0);
 100 MODULE_PARM_DESC(size, "memory size");
 101
 102 static u32 __iomem *ps3vram_get_notifier(void __iomem *reports, int notifier)
 103 {
 104         return reports + DMA_NOTIFIER_OFFSET_BASE +
 105                DMA_NOTIFIER_SIZE * notifier;
 106 }
 107
 108 static void ps3vram_notifier_reset(struct ps3_system_bus_device *dev)
 109 {
 110         struct ps3vram_priv *priv = ps3_system_bus_get_drvdata(dev);
 111         u32 __iomem *notify = ps3vram_get_notifier(priv->reports, NOTIFIER);
 112         int i;
 113
 114         for (i = 0; i < 4; i++)
 115                 iowrite32be(0xffffffff, notify + i);
 116 }
 117
 118 static int ps3vram_notifier_wait(struct ps3_system_bus_device *dev,
 119                                  unsigned int timeout_ms)
 120 {
 121         struct ps3vram_priv *priv = ps3_system_bus_get_drvdata(dev);
 122         u32 __iomem *notify = ps3vram_get_notifier(priv->reports, NOTIFIER);
 123         unsigned long timeout;
 124
 125         for (timeout = 20; timeout; timeout--) {
 126                 if (!ioread32be(notify + 3))
 127                         return 0;
 128                 udelay(10);
 129         }
 130
 131         timeout = jiffies + msecs_to_jiffies(timeout_ms);
 132
 133         do {
 134                 if (!ioread32be(notify + 3))
 135                         return 0;
 136                 msleep(1);
 137         } while (time_before(jiffies, timeout));
 138
 139         return -ETIMEDOUT;
 140 }
 141
 142 static void ps3vram_init_ring(struct ps3_system_bus_device *dev)
 143 {
 144         struct ps3vram_priv *priv = ps3_system_bus_get_drvdata(dev);
 145
 146         iowrite32be(FIFO_BASE + FIFO_OFFSET, priv->ctrl + CTRL_PUT);
 147         iowrite32be(FIFO_BASE + FIFO_OFFSET, priv->ctrl + CTRL_GET);
 148 }
 149
 150 static int ps3vram_wait_ring(struct ps3_system_bus_device *dev,
 151                              unsigned int timeout_ms)
 152 {
 153         struct ps3vram_priv *priv = ps3_system_bus_get_drvdata(dev);
 154         unsigned long timeout = jiffies + msecs_to_jiffies(timeout_ms);
 155
 156         do {
 157                 if (ioread32be(priv->ctrl + CTRL_PUT) == ioread32be(priv->ctrl + CTRL_GET))
 158                         return 0;
 159                 msleep(1);
 160         } while (time_before(jiffies, timeout));
 161
 162         dev_warn(&dev->core, "FIFO timeout (%08x/%08x/%08x)\n",
 163                  ioread32be(priv->ctrl + CTRL_PUT), ioread32be(priv->ctrl + CTRL_GET),
 164                  ioread32be(priv->ctrl + CTRL_TOP));
 165
 166         return -ETIMEDOUT;
 167 }
 168
 169 static void ps3vram_out_ring(struct ps3vram_priv *priv, u32 data)
 170 {
 171         *(priv->fifo_ptr)++ = data;
 172 }
 173
 174 static void ps3vram_begin_ring(struct ps3vram_priv *priv, u32 chan, u32 tag,
 175                                u32 size)
 176 {
 177         ps3vram_out_ring(priv, (size << 18) | (chan << 13) | tag);
 178 }
 179
 180 static void ps3vram_rewind_ring(struct ps3_system_bus_device *dev)
 181 {
 182         struct ps3vram_priv *priv = ps3_system_bus_get_drvdata(dev);
 183         int status;
 184
 185         ps3vram_out_ring(priv, 0x20000000 | (FIFO_BASE + FIFO_OFFSET));
 186
 187         iowrite32be(FIFO_BASE + FIFO_OFFSET, priv->ctrl + CTRL_PUT);
 188
 189         /* asking the HV for a blit will kick the FIFO */
 190         status = lv1_gpu_fb_blit(priv->context_handle, 0, 0, 0, 0);
 191         if (status)
 192                 dev_err(&dev->core, "%s: lv1_gpu_fb_blit failed %d\n",
 193                         __func__, status);
 194
 195         priv->fifo_ptr = priv->fifo_base;
 196 }
 197
 198 static void ps3vram_fire_ring(struct ps3_system_bus_device *dev)
 199 {
 200         struct ps3vram_priv *priv = ps3_system_bus_get_drvdata(dev);
 201         int status;
 202
 203         mutex_lock(&ps3_gpu_mutex);
 204
 205         iowrite32be(FIFO_BASE + FIFO_OFFSET + (priv->fifo_ptr - priv->fifo_base)
 206                 * sizeof(u32), priv->ctrl + CTRL_PUT);
 207
 208         /* asking the HV for a blit will kick the FIFO */
 209         status = lv1_gpu_fb_blit(priv->context_handle, 0, 0, 0, 0);
 210         if (status)
 211                 dev_err(&dev->core, "%s: lv1_gpu_fb_blit failed %d\n",
 212                         __func__, status);
 213
 214         if ((priv->fifo_ptr - priv->fifo_base) * sizeof(u32) >
 215             FIFO_SIZE - 1024) {
 216                 dev_dbg(&dev->core, "FIFO full, rewinding\n");
 217                 ps3vram_wait_ring(dev, 200);
 218                 ps3vram_rewind_ring(dev);
 219         }
 220
 221         mutex_unlock(&ps3_gpu_mutex);
 222 }
 223
 224 static void ps3vram_bind(struct ps3_system_bus_device *dev)
 225 {
 226         struct ps3vram_priv *priv = ps3_system_bus_get_drvdata(dev);
 227
 228         ps3vram_begin_ring(priv, UPLOAD_SUBCH, 0, 1);
 229         ps3vram_out_ring(priv, 0x31337303);
 230         ps3vram_begin_ring(priv, UPLOAD_SUBCH, 0x180, 3);
 231         ps3vram_out_ring(priv, DMA_NOTIFIER_HANDLE_BASE + NOTIFIER);
 232         ps3vram_out_ring(priv, 0xfeed0001);     /* DMA system RAM instance */
 233         ps3vram_out_ring(priv, 0xfeed0000);     /* DMA video RAM instance */
 234
 235         ps3vram_begin_ring(priv, DOWNLOAD_SUBCH, 0, 1);
 236         ps3vram_out_ring(priv, 0x3137c0de);
 237         ps3vram_begin_ring(priv, DOWNLOAD_SUBCH, 0x180, 3);
 238         ps3vram_out_ring(priv, DMA_NOTIFIER_HANDLE_BASE + NOTIFIER);
 239         ps3vram_out_ring(priv, 0xfeed0000);     /* DMA video RAM instance */
 240         ps3vram_out_ring(priv, 0xfeed0001);     /* DMA system RAM instance */
 241
 242         ps3vram_fire_ring(dev);
 243 }
 244
 245 static int ps3vram_upload(struct ps3_system_bus_device *dev,
 246                           unsigned int src_offset, unsigned int dst_offset,
 247                           int len, int count)
 248 {
 249         struct ps3vram_priv *priv = ps3_system_bus_get_drvdata(dev);
 250
 251         ps3vram_begin_ring(priv, UPLOAD_SUBCH,
 252                            NV_MEMORY_TO_MEMORY_FORMAT_OFFSET_IN, 8);
 253         ps3vram_out_ring(priv, XDR_IOIF + src_offset);
 254         ps3vram_out_ring(priv, dst_offset);
 255         ps3vram_out_ring(priv, len);
 256         ps3vram_out_ring(priv, len);
 257         ps3vram_out_ring(priv, len);
 258         ps3vram_out_ring(priv, count);
 259         ps3vram_out_ring(priv, (1 << 8) | 1);
 260         ps3vram_out_ring(priv, 0);
 261
 262         ps3vram_notifier_reset(dev);
 263         ps3vram_begin_ring(priv, UPLOAD_SUBCH,
 264                            NV_MEMORY_TO_MEMORY_FORMAT_NOTIFY, 1);
 265         ps3vram_out_ring(priv, 0);
 266         ps3vram_begin_ring(priv, UPLOAD_SUBCH, 0x100, 1);
 267         ps3vram_out_ring(priv, 0);
 268         ps3vram_fire_ring(dev);
 269         if (ps3vram_notifier_wait(dev, 200) < 0) {
 270                 dev_warn(&dev->core, "%s: Notifier timeout\n", __func__);
 271                 return -1;
 272         }
 273
 274         return 0;
 275 }
 276
 277 static int ps3vram_download(struct ps3_system_bus_device *dev,
 278                             unsigned int src_offset, unsigned int dst_offset,
 279                             int len, int count)
 280 {
 281         struct ps3vram_priv *priv = ps3_system_bus_get_drvdata(dev);
 282
 283         ps3vram_begin_ring(priv, DOWNLOAD_SUBCH,
 284                            NV_MEMORY_TO_MEMORY_FORMAT_OFFSET_IN, 8);
 285         ps3vram_out_ring(priv, src_offset);
 286         ps3vram_out_ring(priv, XDR_IOIF + dst_offset);
 287         ps3vram_out_ring(priv, len);
 288         ps3vram_out_ring(priv, len);
 289         ps3vram_out_ring(priv, len);
 290         ps3vram_out_ring(priv, count);
 291         ps3vram_out_ring(priv, (1 << 8) | 1);
 292         ps3vram_out_ring(priv, 0);
 293
 294         ps3vram_notifier_reset(dev);
 295         ps3vram_begin_ring(priv, DOWNLOAD_SUBCH,
 296                            NV_MEMORY_TO_MEMORY_FORMAT_NOTIFY, 1);
 297         ps3vram_out_ring(priv, 0);
 298         ps3vram_begin_ring(priv, DOWNLOAD_SUBCH, 0x100, 1);
 299         ps3vram_out_ring(priv, 0);
 300         ps3vram_fire_ring(dev);
 301         if (ps3vram_notifier_wait(dev, 200) < 0) {
 302                 dev_warn(&dev->core, "%s: Notifier timeout\n", __func__);
 303                 return -1;
 304         }
 305
 306         return 0;
 307 }
 308
 309 static void ps3vram_cache_evict(struct ps3_system_bus_device *dev, int entry)
 310 {
 311         struct ps3vram_priv *priv = ps3_system_bus_get_drvdata(dev);
 312         struct ps3vram_cache *cache = &priv->cache;
 313
 314         if (!(cache->tags[entry].flags & CACHE_PAGE_DIRTY))
 315                 return;
 316
 317         dev_dbg(&dev->core, "Flushing %d: 0x%08x\n", entry,
 318                 cache->tags[entry].address);
 319         if (ps3vram_upload(dev, CACHE_OFFSET + entry * cache->page_size,
 320                            cache->tags[entry].address, DMA_PAGE_SIZE,
 321                            cache->page_size / DMA_PAGE_SIZE) < 0) {
 322                 dev_err(&dev->core,
 323                         "Failed to upload from 0x%x to " "0x%x size 0x%x\n",
 324                         entry * cache->page_size, cache->tags[entry].address,
 325                         cache->page_size);
 326         }
 327         cache->tags[entry].flags &= ~CACHE_PAGE_DIRTY;
 328 }
 329
 330 static void ps3vram_cache_load(struct ps3_system_bus_device *dev, int entry,
 331                                unsigned int address)
 332 {
 333         struct ps3vram_priv *priv = ps3_system_bus_get_drvdata(dev);
 334         struct ps3vram_cache *cache = &priv->cache;
 335
 336         dev_dbg(&dev->core, "Fetching %d: 0x%08x\n", entry, address);
 337         if (ps3vram_download(dev, address,
 338                              CACHE_OFFSET + entry * cache->page_size,
 339                              DMA_PAGE_SIZE,
 340                              cache->page_size / DMA_PAGE_SIZE) < 0) {
 341                 dev_err(&dev->core,
 342                         "Failed to download from 0x%x to 0x%x size 0x%x\n",
 343                         address, entry * cache->page_size, cache->page_size);
 344         }
 345
 346         cache->tags[entry].address = address;
 347         cache->tags[entry].flags |= CACHE_PAGE_PRESENT;
 348 }
 349
 350
 351 static void ps3vram_cache_flush(struct ps3_system_bus_device *dev)
 352 {
 353         struct ps3vram_priv *priv = ps3_system_bus_get_drvdata(dev);
 354         struct ps3vram_cache *cache = &priv->cache;
 355         int i;
 356
 357         dev_dbg(&dev->core, "FLUSH\n");
 358         for (i = 0; i < cache->page_count; i++) {
 359                 ps3vram_cache_evict(dev, i);
 360                 cache->tags[i].flags = 0;
 361         }
 362 }
 363
 364 static unsigned int ps3vram_cache_match(struct ps3_system_bus_device *dev,
 365                                         loff_t address)
 366 {
 367         struct ps3vram_priv *priv = ps3_system_bus_get_drvdata(dev);
 368         struct ps3vram_cache *cache = &priv->cache;
 369         unsigned int base;
 370         unsigned int offset;
 371         int i;
 372         static int counter;
 373
 374         offset = (unsigned int) (address & (cache->page_size - 1));
 375         base = (unsigned int) (address - offset);
 376
 377         /* fully associative check */
 378         for (i = 0; i < cache->page_count; i++) {
 379                 if ((cache->tags[i].flags & CACHE_PAGE_PRESENT) &&
 380                     cache->tags[i].address == base) {
 381                         cache->hit++;
 382                         dev_dbg(&dev->core, "Found entry %d: 0x%08x\n", i,
 383                                 cache->tags[i].address);
 384                         return i;
 385                 }
 386         }
 387
 388         /* choose a random entry */
 389         i = (jiffies + (counter++)) % cache->page_count;
 390         dev_dbg(&dev->core, "Using entry %d\n", i);
 391
 392         ps3vram_cache_evict(dev, i);
 393         ps3vram_cache_load(dev, i, base);
 394
 395         cache->miss++;
 396         return i;
 397 }
 398
 399 static int ps3vram_cache_init(struct ps3_system_bus_device *dev)
 400 {
 401         struct ps3vram_priv *priv = ps3_system_bus_get_drvdata(dev);
 402
 403         priv->cache.page_count = CACHE_PAGE_COUNT;
 404         priv->cache.page_size = CACHE_PAGE_SIZE;
 405         priv->cache.tags = kcalloc(CACHE_PAGE_COUNT,
 406                                    sizeof(struct ps3vram_tag),
 407                                    GFP_KERNEL);
 408         if (!priv->cache.tags)
 409                 return -ENOMEM;
 410
 411         dev_info(&dev->core, "Created ram cache: %d entries, %d KiB each\n",
 412                 CACHE_PAGE_COUNT, CACHE_PAGE_SIZE / 1024);
 413
 414         return 0;
 415 }
 416
 417 static void ps3vram_cache_cleanup(struct ps3_system_bus_device *dev)
 418 {
 419         struct ps3vram_priv *priv = ps3_system_bus_get_drvdata(dev);
 420
 421         ps3vram_cache_flush(dev);
 422         kfree(priv->cache.tags);
 423 }
 424
 425 static blk_status_t ps3vram_read(struct ps3_system_bus_device *dev, loff_t from,
 426                         size_t len, size_t *retlen, u_char *buf)
 427 {
 428         struct ps3vram_priv *priv = ps3_system_bus_get_drvdata(dev);
 429         unsigned int cached, count;
 430
 431         dev_dbg(&dev->core, "%s: from=0x%08x len=0x%zx\n", __func__,
 432                 (unsigned int)from, len);
 433
 434         if (from >= priv->size)
 435                 return BLK_STS_IOERR;
 436
 437         if (len > priv->size - from)
 438                 len = priv->size - from;
 439
 440         /* Copy from vram to buf */
 441         count = len;
 442         while (count) {
 443                 unsigned int offset, avail;
 444                 unsigned int entry;
 445
 446                 offset = (unsigned int) (from & (priv->cache.page_size - 1));
 447                 avail  = priv->cache.page_size - offset;
 448
 449                 entry = ps3vram_cache_match(dev, from);
 450                 cached = CACHE_OFFSET + entry * priv->cache.page_size + offset;
 451
 452                 dev_dbg(&dev->core, "%s: from=%08x cached=%08x offset=%08x "
 453                         "avail=%08x count=%08x\n", __func__,
 454                         (unsigned int)from, cached, offset, avail, count);
 455
 456                 if (avail > count)
 457                         avail = count;
 458                 memcpy(buf, priv->xdr_buf + cached, avail);
 459
 460                 buf += avail;
 461                 count -= avail;
 462                 from += avail;
 463         }
 464
 465         *retlen = len;
 466         return 0;
 467 }
 468
 469 static blk_status_t ps3vram_write(struct ps3_system_bus_device *dev, loff_t to,
 470                          size_t len, size_t *retlen, const u_char *buf)
 471 {
 472         struct ps3vram_priv *priv = ps3_system_bus_get_drvdata(dev);
 473         unsigned int cached, count;
 474
 475         if (to >= priv->size)
 476                 return BLK_STS_IOERR;
 477
 478         if (len > priv->size - to)
 479                 len = priv->size - to;
 480
 481         /* Copy from buf to vram */
 482         count = len;
 483         while (count) {
 484                 unsigned int offset, avail;
 485                 unsigned int entry;
 486
 487                 offset = (unsigned int) (to & (priv->cache.page_size - 1));
 488                 avail  = priv->cache.page_size - offset;
 489
 490                 entry = ps3vram_cache_match(dev, to);
 491                 cached = CACHE_OFFSET + entry * priv->cache.page_size + offset;
 492
 493                 dev_dbg(&dev->core, "%s: to=%08x cached=%08x offset=%08x "
 494                         "avail=%08x count=%08x\n", __func__, (unsigned int)to,
 495                         cached, offset, avail, count);
 496
 497                 if (avail > count)
 498                         avail = count;
 499                 memcpy(priv->xdr_buf + cached, buf, avail);
 500
 501                 priv->cache.tags[entry].flags |= CACHE_PAGE_DIRTY;
 502
 503                 buf += avail;
 504                 count -= avail;
 505                 to += avail;
 506         }
 507
 508         *retlen = len;
 509         return 0;
 510 }
 511
 512 static int ps3vram_proc_show(struct seq_file *m, void *v)
 513 {
 514         struct ps3vram_priv *priv = m->private;
 515
 516         seq_printf(m, "hit:%u\nmiss:%u\n", priv->cache.hit, priv->cache.miss);
 517         return 0;
 518 }
 519
 520 static void ps3vram_proc_init(struct ps3_system_bus_device *dev)
 521 {
 522         struct ps3vram_priv *priv = ps3_system_bus_get_drvdata(dev);
 523         struct proc_dir_entry *pde;
 524
 525         pde = proc_create_single_data(DEVICE_NAME, 0444, NULL,
 526                         ps3vram_proc_show, priv);
 527         if (!pde)
 528                 dev_warn(&dev->core, "failed to create /proc entry\n");
 529 }
 530
 531 static struct bio *ps3vram_do_bio(struct ps3_system_bus_device *dev,
 532                                   struct bio *bio)
 533 {
 534         struct ps3vram_priv *priv = ps3_system_bus_get_drvdata(dev);
 535         int write = bio_data_dir(bio) == WRITE;
 536         const char *op = write ? "write" : "read";
 537         loff_t offset = bio->bi_iter.bi_sector << 9;
 538         blk_status_t error = 0;
 539         struct bio_vec bvec;
 540         struct bvec_iter iter;
 541         struct bio *next;
 542
 543         bio_for_each_segment(bvec, bio, iter) {
 544                 /* PS3 is ppc64, so we don't handle highmem */
 545                 char *ptr = page_address(bvec.bv_page) + bvec.bv_offset;
 546                 size_t len = bvec.bv_len, retlen;
 547
 548                 dev_dbg(&dev->core, "    %s %zu bytes at offset %llu\n", op,
 549                         len, offset);
 550                 if (write)
 551                         error = ps3vram_write(dev, offset, len, &retlen, ptr);
 552                 else
 553                         error = ps3vram_read(dev, offset, len, &retlen, ptr);
 554
 555                 if (error) {
 556                         dev_err(&dev->core, "%s failed\n", op);
 557                         goto out;
 558                 }
 559
 560                 if (retlen != len) {
 561                         dev_err(&dev->core, "Short %s\n", op);
 562                         error = BLK_STS_IOERR;
 563                         goto out;
 564                 }
 565
 566                 offset += len;
 567         }
 568
 569         dev_dbg(&dev->core, "%s completed\n", op);
 570
 571 out:
 572         spin_lock_irq(&priv->lock);
 573         bio_list_pop(&priv->list);
 574         next = bio_list_peek(&priv->list);
 575         spin_unlock_irq(&priv->lock);
 576
 577         bio->bi_status = error;
 578         bio_endio(bio);
 579         return next;
 580 }
 581
 582 static blk_qc_t ps3vram_submit_bio(struct bio *bio)
 583 {
 584         struct ps3_system_bus_device *dev = bio->bi_disk->private_data;
 585         struct ps3vram_priv *priv = ps3_system_bus_get_drvdata(dev);
 586         int busy;
 587
 588         dev_dbg(&dev->core, "%s\n", __func__);
 589
 590         blk_queue_split(&bio);
 591
 592         spin_lock_irq(&priv->lock);
 593         busy = !bio_list_empty(&priv->list);
 594         bio_list_add(&priv->list, bio);
 595         spin_unlock_irq(&priv->lock);
 596
 597         if (busy)
 598                 return BLK_QC_T_NONE;
 599
 600         do {
 601                 bio = ps3vram_do_bio(dev, bio);
 602         } while (bio);
 603
 604         return BLK_QC_T_NONE;
 605 }
 606
 607 static const struct block_device_operations ps3vram_fops = {
 608         .owner          = THIS_MODULE,
 609         .submit_bio     = ps3vram_submit_bio,
 610 };
 611
 612 static int ps3vram_probe(struct ps3_system_bus_device *dev)
 613 {
 614         struct ps3vram_priv *priv;
 615         int error, status;
 616         struct request_queue *queue;
 617         struct gendisk *gendisk;
 618         u64 ddr_size, ddr_lpar, ctrl_lpar, info_lpar, reports_lpar,
 619             reports_size, xdr_lpar;
 620         char *rest;
 621
 622         priv = kzalloc(sizeof(*priv), GFP_KERNEL);
 623         if (!priv) {
 624                 error = -ENOMEM;
 625                 goto fail;
 626         }
 627
 628         spin_lock_init(&priv->lock);
 629         bio_list_init(&priv->list);
 630         ps3_system_bus_set_drvdata(dev, priv);
 631
 632         /* Allocate XDR buffer (1MiB aligned) */
 633         priv->xdr_buf = (void *)__get_free_pages(GFP_KERNEL,
 634                 get_order(XDR_BUF_SIZE));
 635         if (priv->xdr_buf == NULL) {
 636                 dev_err(&dev->core, "Could not allocate XDR buffer\n");
 637                 error = -ENOMEM;
 638                 goto fail_free_priv;
 639         }
 640
 641         /* Put FIFO at begginning of XDR buffer */
 642         priv->fifo_base = (u32 *) (priv->xdr_buf + FIFO_OFFSET);
 643         priv->fifo_ptr = priv->fifo_base;
 644
 645         /* XXX: Need to open GPU, in case ps3fb or snd_ps3 aren't loaded */
 646         if (ps3_open_hv_device(dev)) {
 647                 dev_err(&dev->core, "ps3_open_hv_device failed\n");
 648                 error = -EAGAIN;
 649                 goto out_free_xdr_buf;
 650         }
 651
 652         /* Request memory */
 653         status = -1;
 654         ddr_size = ALIGN(memparse(size, &rest), 1024*1024);
 655         if (!ddr_size) {
 656                 dev_err(&dev->core, "Specified size is too small\n");
 657                 error = -EINVAL;
 658                 goto out_close_gpu;
 659         }
 660
 661         while (ddr_size > 0) {
 662                 status = lv1_gpu_memory_allocate(ddr_size, 0, 0, 0, 0,
 663                                                  &priv->memory_handle,
 664                                                  &ddr_lpar);
 665                 if (!status)
 666                         break;
 667                 ddr_size -= 1024*1024;
 668         }
 669         if (status) {
 670                 dev_err(&dev->core, "lv1_gpu_memory_allocate failed %d\n",
 671                         status);
 672                 error = -ENOMEM;
 673                 goto out_close_gpu;
 674         }
 675
 676         /* Request context */
 677         status = lv1_gpu_context_allocate(priv->memory_handle, 0,
 678                                           &priv->context_handle, &ctrl_lpar,
 679                                           &info_lpar, &reports_lpar,
 680                                           &reports_size);
 681         if (status) {
 682                 dev_err(&dev->core, "lv1_gpu_context_allocate failed %d\n",
 683                         status);
 684                 error = -ENOMEM;
 685                 goto out_free_memory;
 686         }
 687
 688         /* Map XDR buffer to RSX */
 689         xdr_lpar = ps3_mm_phys_to_lpar(__pa(priv->xdr_buf));
 690         status = lv1_gpu_context_iomap(priv->context_handle, XDR_IOIF,
 691                                        xdr_lpar, XDR_BUF_SIZE,
 692                                        CBE_IOPTE_PP_W | CBE_IOPTE_PP_R |
 693                                        CBE_IOPTE_M);
 694         if (status) {
 695                 dev_err(&dev->core, "lv1_gpu_context_iomap failed %d\n",
 696                         status);
 697                 error = -ENOMEM;
 698                 goto out_free_context;
 699         }
 700
 701         priv->ctrl = ioremap(ctrl_lpar, 64 * 1024);
 702         if (!priv->ctrl) {
 703                 dev_err(&dev->core, "ioremap CTRL failed\n");
 704                 error = -ENOMEM;
 705                 goto out_unmap_context;
 706         }
 707
 708         priv->reports = ioremap(reports_lpar, reports_size);
 709         if (!priv->reports) {
 710                 dev_err(&dev->core, "ioremap REPORTS failed\n");
 711                 error = -ENOMEM;
 712                 goto out_unmap_ctrl;
 713         }
 714
 715         mutex_lock(&ps3_gpu_mutex);
 716         ps3vram_init_ring(dev);
 717         mutex_unlock(&ps3_gpu_mutex);
 718
 719         priv->size = ddr_size;
 720
 721         ps3vram_bind(dev);
 722
 723         mutex_lock(&ps3_gpu_mutex);
 724         error = ps3vram_wait_ring(dev, 100);
 725         mutex_unlock(&ps3_gpu_mutex);
 726         if (error < 0) {
 727                 dev_err(&dev->core, "Failed to initialize channels\n");
 728                 error = -ETIMEDOUT;
 729                 goto out_unmap_reports;
 730         }
 731
 732         error = ps3vram_cache_init(dev);
 733         if (error < 0) {
 734                 goto out_unmap_reports;
 735         }
 736
 737         ps3vram_proc_init(dev);
 738
 739         queue = blk_alloc_queue(NUMA_NO_NODE);
 740         if (!queue) {
 741                 dev_err(&dev->core, "blk_alloc_queue failed\n");
 742                 error = -ENOMEM;
 743                 goto out_cache_cleanup;
 744         }
 745
 746         priv->queue = queue;
 747         blk_queue_max_segments(queue, BLK_MAX_SEGMENTS);
 748         blk_queue_max_segment_size(queue, BLK_MAX_SEGMENT_SIZE);
 749         blk_queue_max_hw_sectors(queue, BLK_SAFE_MAX_SECTORS);
 750
 751         gendisk = alloc_disk(1);
 752         if (!gendisk) {
 753                 dev_err(&dev->core, "alloc_disk failed\n");
 754                 error = -ENOMEM;
 755                 goto fail_cleanup_queue;
 756         }
 757
 758         priv->gendisk = gendisk;
 759         gendisk->major = ps3vram_major;
 760         gendisk->first_minor = 0;
 761         gendisk->fops = &ps3vram_fops;
 762         gendisk->queue = queue;
 763         gendisk->private_data = dev;
 764         strlcpy(gendisk->disk_name, DEVICE_NAME, sizeof(gendisk->disk_name));
 765         set_capacity(gendisk, priv->size >> 9);
 766
 767         dev_info(&dev->core, "%s: Using %llu MiB of GPU memory\n",
 768                  gendisk->disk_name, get_capacity(gendisk) >> 11);
 769
 770         device_add_disk(&dev->core, gendisk, NULL);
 771         return 0;
 772
 773 fail_cleanup_queue:
 774         blk_cleanup_queue(queue);
 775 out_cache_cleanup:
 776         remove_proc_entry(DEVICE_NAME, NULL);
 777         ps3vram_cache_cleanup(dev);
 778 out_unmap_reports:
 779         iounmap(priv->reports);
 780 out_unmap_ctrl:
 781         iounmap(priv->ctrl);
 782 out_unmap_context:
 783         lv1_gpu_context_iomap(priv->context_handle, XDR_IOIF, xdr_lpar,
 784                               XDR_BUF_SIZE, CBE_IOPTE_M);
 785 out_free_context:
 786         lv1_gpu_context_free(priv->context_handle);
 787 out_free_memory:
 788         lv1_gpu_memory_free(priv->memory_handle);
 789 out_close_gpu:
 790         ps3_close_hv_device(dev);
 791 out_free_xdr_buf:
 792         free_pages((unsigned long) priv->xdr_buf, get_order(XDR_BUF_SIZE));
 793 fail_free_priv:
 794         kfree(priv);
 795         ps3_system_bus_set_drvdata(dev, NULL);
 796 fail:
 797         return error;
 798 }
 799
 800 static void ps3vram_remove(struct ps3_system_bus_device *dev)
 801 {
 802         struct ps3vram_priv *priv = ps3_system_bus_get_drvdata(dev);
 803
 804         del_gendisk(priv->gendisk);
 805         put_disk(priv->gendisk);
 806         blk_cleanup_queue(priv->queue);
 807         remove_proc_entry(DEVICE_NAME, NULL);
 808         ps3vram_cache_cleanup(dev);
 809         iounmap(priv->reports);
 810         iounmap(priv->ctrl);
 811         lv1_gpu_context_iomap(priv->context_handle, XDR_IOIF,
 812                               ps3_mm_phys_to_lpar(__pa(priv->xdr_buf)),
 813                               XDR_BUF_SIZE, CBE_IOPTE_M);
 814         lv1_gpu_context_free(priv->context_handle);
 815         lv1_gpu_memory_free(priv->memory_handle);
 816         ps3_close_hv_device(dev);
 817         free_pages((unsigned long) priv->xdr_buf, get_order(XDR_BUF_SIZE));
 818         kfree(priv);
 819         ps3_system_bus_set_drvdata(dev, NULL);
 820 }
 821
 822 static struct ps3_system_bus_driver ps3vram = {
 823         .match_id       = PS3_MATCH_ID_GPU,
 824         .match_sub_id   = PS3_MATCH_SUB_ID_GPU_RAMDISK,
 825         .core.name      = DEVICE_NAME,
 826         .core.owner     = THIS_MODULE,
 827         .probe          = ps3vram_probe,
 828         .remove         = ps3vram_remove,
 829         .shutdown       = ps3vram_remove,
 830 };
 831
 832
 833 static int __init ps3vram_init(void)
 834 {
 835         int error;
 836
 837         if (!firmware_has_feature(FW_FEATURE_PS3_LV1))
 838                 return -ENODEV;
 839
 840         error = register_blkdev(0, DEVICE_NAME);
 841         if (error <= 0) {
 842                 pr_err("%s: register_blkdev failed %d\n", DEVICE_NAME, error);
 843                 return error;
 844         }
 845         ps3vram_major = error;
 846
 847         pr_info("%s: registered block device major %d\n", DEVICE_NAME,
 848                 ps3vram_major);
 849
 850         error = ps3_system_bus_driver_register(&ps3vram);
 851         if (error)
 852                 unregister_blkdev(ps3vram_major, DEVICE_NAME);
 853
 854         return error;
 855 }
 856
 857 static void __exit ps3vram_exit(void)
 858 {
 859         ps3_system_bus_driver_unregister(&ps3vram);
 860         unregister_blkdev(ps3vram_major, DEVICE_NAME);
 861 }
 862
 863 module_init(ps3vram_init);
 864 module_exit(ps3vram_exit);
 865
 866 MODULE_LICENSE("GPL");
 867 MODULE_DESCRIPTION("PS3 Video RAM Storage Driver");
 868 MODULE_AUTHOR("Sony Corporation");
 869 MODULE_ALIAS(PS3_MODULE_ALIAS_GPU_RAMDISK);