Geert Uytterhoeven | f507cd2 | 2009-03-06 02:54:09 +0000 | [diff] [blame] | 1 | /* |
| 2 | * ps3vram - Use extra PS3 video ram as MTD block device. |
| 3 | * |
| 4 | * Copyright 2009 Sony Corporation |
| 5 | * |
| 6 | * Based on the MTD ps3vram driver, which is |
| 7 | * Copyright (c) 2007-2008 Jim Paris <jim@jtan.com> |
| 8 | * Added support RSX DMA Vivien Chappelier <vivien.chappelier@free.fr> |
| 9 | */ |
| 10 | |
| 11 | #include <linux/blkdev.h> |
| 12 | #include <linux/delay.h> |
| 13 | #include <linux/proc_fs.h> |
| 14 | #include <linux/seq_file.h> |
| 15 | |
| 16 | #include <asm/firmware.h> |
| 17 | #include <asm/lv1call.h> |
| 18 | #include <asm/ps3.h> |
| 19 | |
| 20 | |
| 21 | #define DEVICE_NAME "ps3vram" |
| 22 | |
| 23 | |
| 24 | #define XDR_BUF_SIZE (2 * 1024 * 1024) /* XDR buffer (must be 1MiB aligned) */ |
| 25 | #define XDR_IOIF 0x0c000000 |
| 26 | |
| 27 | #define FIFO_BASE XDR_IOIF |
| 28 | #define FIFO_SIZE (64 * 1024) |
| 29 | |
| 30 | #define DMA_PAGE_SIZE (4 * 1024) |
| 31 | |
| 32 | #define CACHE_PAGE_SIZE (256 * 1024) |
| 33 | #define CACHE_PAGE_COUNT ((XDR_BUF_SIZE - FIFO_SIZE) / CACHE_PAGE_SIZE) |
| 34 | |
| 35 | #define CACHE_OFFSET CACHE_PAGE_SIZE |
| 36 | #define FIFO_OFFSET 0 |
| 37 | |
| 38 | #define CTRL_PUT 0x10 |
| 39 | #define CTRL_GET 0x11 |
| 40 | #define CTRL_TOP 0x15 |
| 41 | |
| 42 | #define UPLOAD_SUBCH 1 |
| 43 | #define DOWNLOAD_SUBCH 2 |
| 44 | |
| 45 | #define NV_MEMORY_TO_MEMORY_FORMAT_OFFSET_IN 0x0000030c |
| 46 | #define NV_MEMORY_TO_MEMORY_FORMAT_NOTIFY 0x00000104 |
| 47 | |
| 48 | #define L1GPU_CONTEXT_ATTRIBUTE_FB_BLIT 0x601 |
| 49 | |
| 50 | #define CACHE_PAGE_PRESENT 1 |
| 51 | #define CACHE_PAGE_DIRTY 2 |
| 52 | |
| 53 | struct ps3vram_tag { |
| 54 | unsigned int address; |
| 55 | unsigned int flags; |
| 56 | }; |
| 57 | |
| 58 | struct ps3vram_cache { |
| 59 | unsigned int page_count; |
| 60 | unsigned int page_size; |
| 61 | struct ps3vram_tag *tags; |
| 62 | unsigned int hit; |
| 63 | unsigned int miss; |
| 64 | }; |
| 65 | |
| 66 | struct ps3vram_priv { |
| 67 | struct request_queue *queue; |
| 68 | struct gendisk *gendisk; |
| 69 | |
| 70 | u64 size; |
| 71 | |
| 72 | u64 memory_handle; |
| 73 | u64 context_handle; |
| 74 | u32 *ctrl; |
| 75 | u32 *reports; |
| 76 | u8 __iomem *ddr_base; |
| 77 | u8 *xdr_buf; |
| 78 | |
| 79 | u32 *fifo_base; |
| 80 | u32 *fifo_ptr; |
| 81 | |
| 82 | struct ps3vram_cache cache; |
| 83 | |
| 84 | /* Used to serialize cache/DMA operations */ |
| 85 | struct mutex lock; |
| 86 | }; |
| 87 | |
| 88 | |
| 89 | static int ps3vram_major; |
| 90 | |
| 91 | |
| 92 | static struct block_device_operations ps3vram_fops = { |
| 93 | .owner = THIS_MODULE, |
| 94 | }; |
| 95 | |
| 96 | |
| 97 | #define DMA_NOTIFIER_HANDLE_BASE 0x66604200 /* first DMA notifier handle */ |
| 98 | #define DMA_NOTIFIER_OFFSET_BASE 0x1000 /* first DMA notifier offset */ |
| 99 | #define DMA_NOTIFIER_SIZE 0x40 |
| 100 | #define NOTIFIER 7 /* notifier used for completion report */ |
| 101 | |
| 102 | static char *size = "256M"; |
| 103 | module_param(size, charp, 0); |
| 104 | MODULE_PARM_DESC(size, "memory size"); |
| 105 | |
| 106 | static u32 *ps3vram_get_notifier(u32 *reports, int notifier) |
| 107 | { |
| 108 | return (void *)reports + DMA_NOTIFIER_OFFSET_BASE + |
| 109 | DMA_NOTIFIER_SIZE * notifier; |
| 110 | } |
| 111 | |
| 112 | static void ps3vram_notifier_reset(struct ps3_system_bus_device *dev) |
| 113 | { |
| 114 | struct ps3vram_priv *priv = dev->core.driver_data; |
| 115 | u32 *notify = ps3vram_get_notifier(priv->reports, NOTIFIER); |
| 116 | int i; |
| 117 | |
| 118 | for (i = 0; i < 4; i++) |
| 119 | notify[i] = 0xffffffff; |
| 120 | } |
| 121 | |
| 122 | static int ps3vram_notifier_wait(struct ps3_system_bus_device *dev, |
| 123 | unsigned int timeout_ms) |
| 124 | { |
| 125 | struct ps3vram_priv *priv = dev->core.driver_data; |
| 126 | u32 *notify = ps3vram_get_notifier(priv->reports, NOTIFIER); |
| 127 | unsigned long timeout = jiffies + msecs_to_jiffies(timeout_ms); |
| 128 | |
| 129 | do { |
| 130 | if (!notify[3]) |
| 131 | return 0; |
| 132 | msleep(1); |
| 133 | } while (time_before(jiffies, timeout)); |
| 134 | |
| 135 | return -ETIMEDOUT; |
| 136 | } |
| 137 | |
| 138 | static void ps3vram_init_ring(struct ps3_system_bus_device *dev) |
| 139 | { |
| 140 | struct ps3vram_priv *priv = dev->core.driver_data; |
| 141 | |
| 142 | priv->ctrl[CTRL_PUT] = FIFO_BASE + FIFO_OFFSET; |
| 143 | priv->ctrl[CTRL_GET] = FIFO_BASE + FIFO_OFFSET; |
| 144 | } |
| 145 | |
| 146 | static int ps3vram_wait_ring(struct ps3_system_bus_device *dev, |
| 147 | unsigned int timeout_ms) |
| 148 | { |
| 149 | struct ps3vram_priv *priv = dev->core.driver_data; |
| 150 | unsigned long timeout = jiffies + msecs_to_jiffies(timeout_ms); |
| 151 | |
| 152 | do { |
| 153 | if (priv->ctrl[CTRL_PUT] == priv->ctrl[CTRL_GET]) |
| 154 | return 0; |
| 155 | msleep(1); |
| 156 | } while (time_before(jiffies, timeout)); |
| 157 | |
| 158 | dev_warn(&dev->core, "FIFO timeout (%08x/%08x/%08x)\n", |
| 159 | priv->ctrl[CTRL_PUT], priv->ctrl[CTRL_GET], |
| 160 | priv->ctrl[CTRL_TOP]); |
| 161 | |
| 162 | return -ETIMEDOUT; |
| 163 | } |
| 164 | |
| 165 | static void ps3vram_out_ring(struct ps3vram_priv *priv, u32 data) |
| 166 | { |
| 167 | *(priv->fifo_ptr)++ = data; |
| 168 | } |
| 169 | |
| 170 | static void ps3vram_begin_ring(struct ps3vram_priv *priv, u32 chan, u32 tag, |
| 171 | u32 size) |
| 172 | { |
| 173 | ps3vram_out_ring(priv, (size << 18) | (chan << 13) | tag); |
| 174 | } |
| 175 | |
| 176 | static void ps3vram_rewind_ring(struct ps3_system_bus_device *dev) |
| 177 | { |
| 178 | struct ps3vram_priv *priv = dev->core.driver_data; |
| 179 | int status; |
| 180 | |
| 181 | ps3vram_out_ring(priv, 0x20000000 | (FIFO_BASE + FIFO_OFFSET)); |
| 182 | |
| 183 | priv->ctrl[CTRL_PUT] = FIFO_BASE + FIFO_OFFSET; |
| 184 | |
| 185 | /* asking the HV for a blit will kick the FIFO */ |
| 186 | status = lv1_gpu_context_attribute(priv->context_handle, |
| 187 | L1GPU_CONTEXT_ATTRIBUTE_FB_BLIT, 0, |
| 188 | 0, 0, 0); |
| 189 | if (status) |
| 190 | dev_err(&dev->core, |
| 191 | "%s: lv1_gpu_context_attribute failed %d\n", __func__, |
| 192 | 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 = dev->core.driver_data; |
| 200 | int status; |
| 201 | |
| 202 | mutex_lock(&ps3_gpu_mutex); |
| 203 | |
| 204 | priv->ctrl[CTRL_PUT] = FIFO_BASE + FIFO_OFFSET + |
| 205 | (priv->fifo_ptr - priv->fifo_base) * sizeof(u32); |
| 206 | |
| 207 | /* asking the HV for a blit will kick the FIFO */ |
| 208 | status = lv1_gpu_context_attribute(priv->context_handle, |
| 209 | L1GPU_CONTEXT_ATTRIBUTE_FB_BLIT, 0, |
| 210 | 0, 0, 0); |
| 211 | if (status) |
| 212 | dev_err(&dev->core, |
| 213 | "%s: lv1_gpu_context_attribute failed %d\n", __func__, |
| 214 | status); |
| 215 | |
| 216 | if ((priv->fifo_ptr - priv->fifo_base) * sizeof(u32) > |
| 217 | FIFO_SIZE - 1024) { |
| 218 | dev_dbg(&dev->core, "FIFO full, rewinding\n"); |
| 219 | ps3vram_wait_ring(dev, 200); |
| 220 | ps3vram_rewind_ring(dev); |
| 221 | } |
| 222 | |
| 223 | mutex_unlock(&ps3_gpu_mutex); |
| 224 | } |
| 225 | |
| 226 | static void ps3vram_bind(struct ps3_system_bus_device *dev) |
| 227 | { |
| 228 | struct ps3vram_priv *priv = dev->core.driver_data; |
| 229 | |
| 230 | ps3vram_begin_ring(priv, UPLOAD_SUBCH, 0, 1); |
| 231 | ps3vram_out_ring(priv, 0x31337303); |
| 232 | ps3vram_begin_ring(priv, UPLOAD_SUBCH, 0x180, 3); |
| 233 | ps3vram_out_ring(priv, DMA_NOTIFIER_HANDLE_BASE + NOTIFIER); |
| 234 | ps3vram_out_ring(priv, 0xfeed0001); /* DMA system RAM instance */ |
| 235 | ps3vram_out_ring(priv, 0xfeed0000); /* DMA video RAM instance */ |
| 236 | |
| 237 | ps3vram_begin_ring(priv, DOWNLOAD_SUBCH, 0, 1); |
| 238 | ps3vram_out_ring(priv, 0x3137c0de); |
| 239 | ps3vram_begin_ring(priv, DOWNLOAD_SUBCH, 0x180, 3); |
| 240 | ps3vram_out_ring(priv, DMA_NOTIFIER_HANDLE_BASE + NOTIFIER); |
| 241 | ps3vram_out_ring(priv, 0xfeed0000); /* DMA video RAM instance */ |
| 242 | ps3vram_out_ring(priv, 0xfeed0001); /* DMA system RAM instance */ |
| 243 | |
| 244 | ps3vram_fire_ring(dev); |
| 245 | } |
| 246 | |
| 247 | static int ps3vram_upload(struct ps3_system_bus_device *dev, |
| 248 | unsigned int src_offset, unsigned int dst_offset, |
| 249 | int len, int count) |
| 250 | { |
| 251 | struct ps3vram_priv *priv = dev->core.driver_data; |
| 252 | |
| 253 | ps3vram_begin_ring(priv, UPLOAD_SUBCH, |
| 254 | NV_MEMORY_TO_MEMORY_FORMAT_OFFSET_IN, 8); |
| 255 | ps3vram_out_ring(priv, XDR_IOIF + src_offset); |
| 256 | ps3vram_out_ring(priv, dst_offset); |
| 257 | ps3vram_out_ring(priv, len); |
| 258 | ps3vram_out_ring(priv, len); |
| 259 | ps3vram_out_ring(priv, len); |
| 260 | ps3vram_out_ring(priv, count); |
| 261 | ps3vram_out_ring(priv, (1 << 8) | 1); |
| 262 | ps3vram_out_ring(priv, 0); |
| 263 | |
| 264 | ps3vram_notifier_reset(dev); |
| 265 | ps3vram_begin_ring(priv, UPLOAD_SUBCH, |
| 266 | NV_MEMORY_TO_MEMORY_FORMAT_NOTIFY, 1); |
| 267 | ps3vram_out_ring(priv, 0); |
| 268 | ps3vram_begin_ring(priv, UPLOAD_SUBCH, 0x100, 1); |
| 269 | ps3vram_out_ring(priv, 0); |
| 270 | ps3vram_fire_ring(dev); |
| 271 | if (ps3vram_notifier_wait(dev, 200) < 0) { |
| 272 | dev_warn(&dev->core, "%s: Notifier timeout\n", __func__); |
| 273 | return -1; |
| 274 | } |
| 275 | |
| 276 | return 0; |
| 277 | } |
| 278 | |
| 279 | static int ps3vram_download(struct ps3_system_bus_device *dev, |
| 280 | unsigned int src_offset, unsigned int dst_offset, |
| 281 | int len, int count) |
| 282 | { |
| 283 | struct ps3vram_priv *priv = dev->core.driver_data; |
| 284 | |
| 285 | ps3vram_begin_ring(priv, DOWNLOAD_SUBCH, |
| 286 | NV_MEMORY_TO_MEMORY_FORMAT_OFFSET_IN, 8); |
| 287 | ps3vram_out_ring(priv, src_offset); |
| 288 | ps3vram_out_ring(priv, XDR_IOIF + dst_offset); |
| 289 | ps3vram_out_ring(priv, len); |
| 290 | ps3vram_out_ring(priv, len); |
| 291 | ps3vram_out_ring(priv, len); |
| 292 | ps3vram_out_ring(priv, count); |
| 293 | ps3vram_out_ring(priv, (1 << 8) | 1); |
| 294 | ps3vram_out_ring(priv, 0); |
| 295 | |
| 296 | ps3vram_notifier_reset(dev); |
| 297 | ps3vram_begin_ring(priv, DOWNLOAD_SUBCH, |
| 298 | NV_MEMORY_TO_MEMORY_FORMAT_NOTIFY, 1); |
| 299 | ps3vram_out_ring(priv, 0); |
| 300 | ps3vram_begin_ring(priv, DOWNLOAD_SUBCH, 0x100, 1); |
| 301 | ps3vram_out_ring(priv, 0); |
| 302 | ps3vram_fire_ring(dev); |
| 303 | if (ps3vram_notifier_wait(dev, 200) < 0) { |
| 304 | dev_warn(&dev->core, "%s: Notifier timeout\n", __func__); |
| 305 | return -1; |
| 306 | } |
| 307 | |
| 308 | return 0; |
| 309 | } |
| 310 | |
| 311 | static void ps3vram_cache_evict(struct ps3_system_bus_device *dev, int entry) |
| 312 | { |
| 313 | struct ps3vram_priv *priv = dev->core.driver_data; |
| 314 | struct ps3vram_cache *cache = &priv->cache; |
| 315 | |
| 316 | if (!(cache->tags[entry].flags & CACHE_PAGE_DIRTY)) |
| 317 | return; |
| 318 | |
| 319 | dev_dbg(&dev->core, "Flushing %d: 0x%08x\n", entry, |
| 320 | cache->tags[entry].address); |
| 321 | if (ps3vram_upload(dev, CACHE_OFFSET + entry * cache->page_size, |
| 322 | cache->tags[entry].address, DMA_PAGE_SIZE, |
| 323 | cache->page_size / DMA_PAGE_SIZE) < 0) { |
| 324 | dev_err(&dev->core, |
| 325 | "Failed to upload from 0x%x to " "0x%x size 0x%x\n", |
| 326 | entry * cache->page_size, cache->tags[entry].address, |
| 327 | cache->page_size); |
| 328 | } |
| 329 | cache->tags[entry].flags &= ~CACHE_PAGE_DIRTY; |
| 330 | } |
| 331 | |
| 332 | static void ps3vram_cache_load(struct ps3_system_bus_device *dev, int entry, |
| 333 | unsigned int address) |
| 334 | { |
| 335 | struct ps3vram_priv *priv = dev->core.driver_data; |
| 336 | struct ps3vram_cache *cache = &priv->cache; |
| 337 | |
| 338 | dev_dbg(&dev->core, "Fetching %d: 0x%08x\n", entry, address); |
| 339 | if (ps3vram_download(dev, address, |
| 340 | CACHE_OFFSET + entry * cache->page_size, |
| 341 | DMA_PAGE_SIZE, |
| 342 | cache->page_size / DMA_PAGE_SIZE) < 0) { |
| 343 | dev_err(&dev->core, |
| 344 | "Failed to download from 0x%x to 0x%x size 0x%x\n", |
| 345 | address, entry * cache->page_size, cache->page_size); |
| 346 | } |
| 347 | |
| 348 | cache->tags[entry].address = address; |
| 349 | cache->tags[entry].flags |= CACHE_PAGE_PRESENT; |
| 350 | } |
| 351 | |
| 352 | |
| 353 | static void ps3vram_cache_flush(struct ps3_system_bus_device *dev) |
| 354 | { |
| 355 | struct ps3vram_priv *priv = dev->core.driver_data; |
| 356 | struct ps3vram_cache *cache = &priv->cache; |
| 357 | int i; |
| 358 | |
| 359 | dev_dbg(&dev->core, "FLUSH\n"); |
| 360 | for (i = 0; i < cache->page_count; i++) { |
| 361 | ps3vram_cache_evict(dev, i); |
| 362 | cache->tags[i].flags = 0; |
| 363 | } |
| 364 | } |
| 365 | |
| 366 | static unsigned int ps3vram_cache_match(struct ps3_system_bus_device *dev, |
| 367 | loff_t address) |
| 368 | { |
| 369 | struct ps3vram_priv *priv = dev->core.driver_data; |
| 370 | struct ps3vram_cache *cache = &priv->cache; |
| 371 | unsigned int base; |
| 372 | unsigned int offset; |
| 373 | int i; |
| 374 | static int counter; |
| 375 | |
| 376 | offset = (unsigned int) (address & (cache->page_size - 1)); |
| 377 | base = (unsigned int) (address - offset); |
| 378 | |
| 379 | /* fully associative check */ |
| 380 | for (i = 0; i < cache->page_count; i++) { |
| 381 | if ((cache->tags[i].flags & CACHE_PAGE_PRESENT) && |
| 382 | cache->tags[i].address == base) { |
| 383 | cache->hit++; |
| 384 | dev_dbg(&dev->core, "Found entry %d: 0x%08x\n", i, |
| 385 | cache->tags[i].address); |
| 386 | return i; |
| 387 | } |
| 388 | } |
| 389 | |
| 390 | /* choose a random entry */ |
| 391 | i = (jiffies + (counter++)) % cache->page_count; |
| 392 | dev_dbg(&dev->core, "Using entry %d\n", i); |
| 393 | |
| 394 | ps3vram_cache_evict(dev, i); |
| 395 | ps3vram_cache_load(dev, i, base); |
| 396 | |
| 397 | cache->miss++; |
| 398 | return i; |
| 399 | } |
| 400 | |
| 401 | static int ps3vram_cache_init(struct ps3_system_bus_device *dev) |
| 402 | { |
| 403 | struct ps3vram_priv *priv = dev->core.driver_data; |
| 404 | |
| 405 | priv->cache.page_count = CACHE_PAGE_COUNT; |
| 406 | priv->cache.page_size = CACHE_PAGE_SIZE; |
| 407 | priv->cache.tags = kzalloc(sizeof(struct ps3vram_tag) * |
| 408 | CACHE_PAGE_COUNT, GFP_KERNEL); |
| 409 | if (priv->cache.tags == NULL) { |
| 410 | dev_err(&dev->core, "Could not allocate cache tags\n"); |
| 411 | return -ENOMEM; |
| 412 | } |
| 413 | |
| 414 | dev_info(&dev->core, "Created ram cache: %d entries, %d KiB each\n", |
| 415 | CACHE_PAGE_COUNT, CACHE_PAGE_SIZE / 1024); |
| 416 | |
| 417 | return 0; |
| 418 | } |
| 419 | |
| 420 | static void ps3vram_cache_cleanup(struct ps3_system_bus_device *dev) |
| 421 | { |
| 422 | struct ps3vram_priv *priv = dev->core.driver_data; |
| 423 | |
| 424 | ps3vram_cache_flush(dev); |
| 425 | kfree(priv->cache.tags); |
| 426 | } |
| 427 | |
| 428 | static int ps3vram_read(struct ps3_system_bus_device *dev, loff_t from, |
| 429 | size_t len, size_t *retlen, u_char *buf) |
| 430 | { |
| 431 | struct ps3vram_priv *priv = dev->core.driver_data; |
| 432 | unsigned int cached, count; |
| 433 | |
| 434 | dev_dbg(&dev->core, "%s: from=0x%08x len=0x%zx\n", __func__, |
| 435 | (unsigned int)from, len); |
| 436 | |
| 437 | if (from >= priv->size) |
| 438 | return -EIO; |
| 439 | |
| 440 | if (len > priv->size - from) |
| 441 | len = priv->size - from; |
| 442 | |
| 443 | /* Copy from vram to buf */ |
| 444 | count = len; |
| 445 | while (count) { |
| 446 | unsigned int offset, avail; |
| 447 | unsigned int entry; |
| 448 | |
| 449 | offset = (unsigned int) (from & (priv->cache.page_size - 1)); |
| 450 | avail = priv->cache.page_size - offset; |
| 451 | |
| 452 | mutex_lock(&priv->lock); |
| 453 | |
| 454 | entry = ps3vram_cache_match(dev, from); |
| 455 | cached = CACHE_OFFSET + entry * priv->cache.page_size + offset; |
| 456 | |
| 457 | dev_dbg(&dev->core, "%s: from=%08x cached=%08x offset=%08x " |
| 458 | "avail=%08x count=%08x\n", __func__, |
| 459 | (unsigned int)from, cached, offset, avail, count); |
| 460 | |
| 461 | if (avail > count) |
| 462 | avail = count; |
| 463 | memcpy(buf, priv->xdr_buf + cached, avail); |
| 464 | |
| 465 | mutex_unlock(&priv->lock); |
| 466 | |
| 467 | buf += avail; |
| 468 | count -= avail; |
| 469 | from += avail; |
| 470 | } |
| 471 | |
| 472 | *retlen = len; |
| 473 | return 0; |
| 474 | } |
| 475 | |
| 476 | static int ps3vram_write(struct ps3_system_bus_device *dev, loff_t to, |
| 477 | size_t len, size_t *retlen, const u_char *buf) |
| 478 | { |
| 479 | struct ps3vram_priv *priv = dev->core.driver_data; |
| 480 | unsigned int cached, count; |
| 481 | |
| 482 | if (to >= priv->size) |
| 483 | return -EIO; |
| 484 | |
| 485 | if (len > priv->size - to) |
| 486 | len = priv->size - to; |
| 487 | |
| 488 | /* Copy from buf to vram */ |
| 489 | count = len; |
| 490 | while (count) { |
| 491 | unsigned int offset, avail; |
| 492 | unsigned int entry; |
| 493 | |
| 494 | offset = (unsigned int) (to & (priv->cache.page_size - 1)); |
| 495 | avail = priv->cache.page_size - offset; |
| 496 | |
| 497 | mutex_lock(&priv->lock); |
| 498 | |
| 499 | entry = ps3vram_cache_match(dev, to); |
| 500 | cached = CACHE_OFFSET + entry * priv->cache.page_size + offset; |
| 501 | |
| 502 | dev_dbg(&dev->core, "%s: to=%08x cached=%08x offset=%08x " |
| 503 | "avail=%08x count=%08x\n", __func__, (unsigned int)to, |
| 504 | cached, offset, avail, count); |
| 505 | |
| 506 | if (avail > count) |
| 507 | avail = count; |
| 508 | memcpy(priv->xdr_buf + cached, buf, avail); |
| 509 | |
| 510 | priv->cache.tags[entry].flags |= CACHE_PAGE_DIRTY; |
| 511 | |
| 512 | mutex_unlock(&priv->lock); |
| 513 | |
| 514 | buf += avail; |
| 515 | count -= avail; |
| 516 | to += avail; |
| 517 | } |
| 518 | |
| 519 | *retlen = len; |
| 520 | return 0; |
| 521 | } |
| 522 | |
| 523 | static int ps3vram_proc_show(struct seq_file *m, void *v) |
| 524 | { |
| 525 | struct ps3vram_priv *priv = m->private; |
| 526 | |
| 527 | seq_printf(m, "hit:%u\nmiss:%u\n", priv->cache.hit, priv->cache.miss); |
| 528 | return 0; |
| 529 | } |
| 530 | |
| 531 | static int ps3vram_proc_open(struct inode *inode, struct file *file) |
| 532 | { |
| 533 | return single_open(file, ps3vram_proc_show, PDE(inode)->data); |
| 534 | } |
| 535 | |
| 536 | static const struct file_operations ps3vram_proc_fops = { |
| 537 | .owner = THIS_MODULE, |
| 538 | .open = ps3vram_proc_open, |
| 539 | .read = seq_read, |
| 540 | .llseek = seq_lseek, |
| 541 | .release = single_release, |
| 542 | }; |
| 543 | |
| 544 | static void __devinit ps3vram_proc_init(struct ps3_system_bus_device *dev) |
| 545 | { |
| 546 | struct ps3vram_priv *priv = dev->core.driver_data; |
| 547 | struct proc_dir_entry *pde; |
| 548 | |
| 549 | pde = proc_create(DEVICE_NAME, 0444, NULL, &ps3vram_proc_fops); |
| 550 | if (!pde) { |
| 551 | dev_warn(&dev->core, "failed to create /proc entry\n"); |
| 552 | return; |
| 553 | } |
Geert Uytterhoeven | f507cd2 | 2009-03-06 02:54:09 +0000 | [diff] [blame] | 554 | pde->data = priv; |
| 555 | } |
| 556 | |
| 557 | static int ps3vram_make_request(struct request_queue *q, struct bio *bio) |
| 558 | { |
| 559 | struct ps3_system_bus_device *dev = q->queuedata; |
| 560 | int write = bio_data_dir(bio) == WRITE; |
| 561 | const char *op = write ? "write" : "read"; |
| 562 | loff_t offset = bio->bi_sector << 9; |
| 563 | int error = 0; |
| 564 | struct bio_vec *bvec; |
| 565 | unsigned int i; |
| 566 | |
| 567 | dev_dbg(&dev->core, "%s\n", __func__); |
| 568 | |
| 569 | bio_for_each_segment(bvec, bio, i) { |
| 570 | /* PS3 is ppc64, so we don't handle highmem */ |
| 571 | char *ptr = page_address(bvec->bv_page) + bvec->bv_offset; |
| 572 | size_t len = bvec->bv_len, retlen; |
| 573 | |
| 574 | dev_dbg(&dev->core, " %s %zu bytes at offset %llu\n", op, |
| 575 | len, offset); |
| 576 | if (write) |
| 577 | error = ps3vram_write(dev, offset, len, &retlen, ptr); |
| 578 | else |
| 579 | error = ps3vram_read(dev, offset, len, &retlen, ptr); |
| 580 | |
| 581 | if (error) { |
| 582 | dev_err(&dev->core, "%s failed\n", op); |
| 583 | goto out; |
| 584 | } |
| 585 | |
| 586 | if (retlen != len) { |
| 587 | dev_err(&dev->core, "Short %s\n", op); |
| 588 | goto out; |
| 589 | } |
| 590 | |
| 591 | offset += len; |
| 592 | } |
| 593 | |
| 594 | dev_dbg(&dev->core, "%s completed\n", op); |
| 595 | |
| 596 | out: |
| 597 | bio_endio(bio, error); |
| 598 | return 0; |
| 599 | } |
| 600 | |
| 601 | static int __devinit ps3vram_probe(struct ps3_system_bus_device *dev) |
| 602 | { |
| 603 | struct ps3vram_priv *priv; |
| 604 | int error, status; |
| 605 | struct request_queue *queue; |
| 606 | struct gendisk *gendisk; |
| 607 | u64 ddr_lpar, ctrl_lpar, info_lpar, reports_lpar, ddr_size, |
| 608 | reports_size; |
| 609 | char *rest; |
| 610 | |
| 611 | priv = kzalloc(sizeof(*priv), GFP_KERNEL); |
| 612 | if (!priv) { |
| 613 | error = -ENOMEM; |
| 614 | goto fail; |
| 615 | } |
| 616 | |
| 617 | mutex_init(&priv->lock); |
| 618 | dev->core.driver_data = priv; |
| 619 | |
| 620 | priv = dev->core.driver_data; |
| 621 | |
| 622 | /* Allocate XDR buffer (1MiB aligned) */ |
| 623 | priv->xdr_buf = (void *)__get_free_pages(GFP_KERNEL, |
| 624 | get_order(XDR_BUF_SIZE)); |
| 625 | if (priv->xdr_buf == NULL) { |
| 626 | dev_err(&dev->core, "Could not allocate XDR buffer\n"); |
| 627 | error = -ENOMEM; |
| 628 | goto fail_free_priv; |
| 629 | } |
| 630 | |
| 631 | /* Put FIFO at begginning of XDR buffer */ |
| 632 | priv->fifo_base = (u32 *) (priv->xdr_buf + FIFO_OFFSET); |
| 633 | priv->fifo_ptr = priv->fifo_base; |
| 634 | |
| 635 | /* XXX: Need to open GPU, in case ps3fb or snd_ps3 aren't loaded */ |
| 636 | if (ps3_open_hv_device(dev)) { |
| 637 | dev_err(&dev->core, "ps3_open_hv_device failed\n"); |
| 638 | error = -EAGAIN; |
| 639 | goto out_close_gpu; |
| 640 | } |
| 641 | |
| 642 | /* Request memory */ |
| 643 | status = -1; |
| 644 | ddr_size = ALIGN(memparse(size, &rest), 1024*1024); |
| 645 | if (!ddr_size) { |
| 646 | dev_err(&dev->core, "Specified size is too small\n"); |
| 647 | error = -EINVAL; |
| 648 | goto out_close_gpu; |
| 649 | } |
| 650 | |
| 651 | while (ddr_size > 0) { |
| 652 | status = lv1_gpu_memory_allocate(ddr_size, 0, 0, 0, 0, |
| 653 | &priv->memory_handle, |
| 654 | &ddr_lpar); |
| 655 | if (!status) |
| 656 | break; |
| 657 | ddr_size -= 1024*1024; |
| 658 | } |
| 659 | if (status) { |
| 660 | dev_err(&dev->core, "lv1_gpu_memory_allocate failed %d\n", |
| 661 | status); |
| 662 | error = -ENOMEM; |
| 663 | goto out_free_xdr_buf; |
| 664 | } |
| 665 | |
| 666 | /* Request context */ |
| 667 | status = lv1_gpu_context_allocate(priv->memory_handle, 0, |
| 668 | &priv->context_handle, &ctrl_lpar, |
| 669 | &info_lpar, &reports_lpar, |
| 670 | &reports_size); |
| 671 | if (status) { |
| 672 | dev_err(&dev->core, "lv1_gpu_context_allocate failed %d\n", |
| 673 | status); |
| 674 | error = -ENOMEM; |
| 675 | goto out_free_memory; |
| 676 | } |
| 677 | |
| 678 | /* Map XDR buffer to RSX */ |
| 679 | status = lv1_gpu_context_iomap(priv->context_handle, XDR_IOIF, |
| 680 | ps3_mm_phys_to_lpar(__pa(priv->xdr_buf)), |
| 681 | XDR_BUF_SIZE, 0); |
| 682 | if (status) { |
| 683 | dev_err(&dev->core, "lv1_gpu_context_iomap failed %d\n", |
| 684 | status); |
| 685 | error = -ENOMEM; |
| 686 | goto out_free_context; |
| 687 | } |
| 688 | |
| 689 | priv->ddr_base = ioremap_flags(ddr_lpar, ddr_size, _PAGE_NO_CACHE); |
| 690 | |
| 691 | if (!priv->ddr_base) { |
| 692 | dev_err(&dev->core, "ioremap DDR failed\n"); |
| 693 | error = -ENOMEM; |
| 694 | goto out_free_context; |
| 695 | } |
| 696 | |
| 697 | priv->ctrl = ioremap(ctrl_lpar, 64 * 1024); |
| 698 | if (!priv->ctrl) { |
| 699 | dev_err(&dev->core, "ioremap CTRL failed\n"); |
| 700 | error = -ENOMEM; |
| 701 | goto out_unmap_vram; |
| 702 | } |
| 703 | |
| 704 | priv->reports = ioremap(reports_lpar, reports_size); |
| 705 | if (!priv->reports) { |
| 706 | dev_err(&dev->core, "ioremap REPORTS failed\n"); |
| 707 | error = -ENOMEM; |
| 708 | goto out_unmap_ctrl; |
| 709 | } |
| 710 | |
| 711 | mutex_lock(&ps3_gpu_mutex); |
| 712 | ps3vram_init_ring(dev); |
| 713 | mutex_unlock(&ps3_gpu_mutex); |
| 714 | |
| 715 | priv->size = ddr_size; |
| 716 | |
| 717 | ps3vram_bind(dev); |
| 718 | |
| 719 | mutex_lock(&ps3_gpu_mutex); |
| 720 | error = ps3vram_wait_ring(dev, 100); |
| 721 | mutex_unlock(&ps3_gpu_mutex); |
| 722 | if (error < 0) { |
| 723 | dev_err(&dev->core, "Failed to initialize channels\n"); |
| 724 | error = -ETIMEDOUT; |
| 725 | goto out_unmap_reports; |
| 726 | } |
| 727 | |
| 728 | ps3vram_cache_init(dev); |
| 729 | ps3vram_proc_init(dev); |
| 730 | |
| 731 | queue = blk_alloc_queue(GFP_KERNEL); |
| 732 | if (!queue) { |
| 733 | dev_err(&dev->core, "blk_alloc_queue failed\n"); |
| 734 | error = -ENOMEM; |
| 735 | goto out_cache_cleanup; |
| 736 | } |
| 737 | |
| 738 | priv->queue = queue; |
| 739 | queue->queuedata = dev; |
| 740 | blk_queue_make_request(queue, ps3vram_make_request); |
| 741 | blk_queue_max_phys_segments(queue, MAX_PHYS_SEGMENTS); |
| 742 | blk_queue_max_hw_segments(queue, MAX_HW_SEGMENTS); |
| 743 | blk_queue_max_segment_size(queue, MAX_SEGMENT_SIZE); |
| 744 | blk_queue_max_sectors(queue, SAFE_MAX_SECTORS); |
| 745 | |
| 746 | gendisk = alloc_disk(1); |
| 747 | if (!gendisk) { |
| 748 | dev_err(&dev->core, "alloc_disk failed\n"); |
| 749 | error = -ENOMEM; |
| 750 | goto fail_cleanup_queue; |
| 751 | } |
| 752 | |
| 753 | priv->gendisk = gendisk; |
| 754 | gendisk->major = ps3vram_major; |
| 755 | gendisk->first_minor = 0; |
| 756 | gendisk->fops = &ps3vram_fops; |
| 757 | gendisk->queue = queue; |
| 758 | gendisk->private_data = dev; |
| 759 | gendisk->driverfs_dev = &dev->core; |
| 760 | strlcpy(gendisk->disk_name, DEVICE_NAME, sizeof(gendisk->disk_name)); |
| 761 | set_capacity(gendisk, priv->size >> 9); |
| 762 | |
| 763 | dev_info(&dev->core, "%s: Using %lu MiB of GPU memory\n", |
| 764 | gendisk->disk_name, get_capacity(gendisk) >> 11); |
| 765 | |
| 766 | add_disk(gendisk); |
| 767 | return 0; |
| 768 | |
| 769 | fail_cleanup_queue: |
| 770 | blk_cleanup_queue(queue); |
| 771 | out_cache_cleanup: |
| 772 | remove_proc_entry(DEVICE_NAME, NULL); |
| 773 | ps3vram_cache_cleanup(dev); |
| 774 | out_unmap_reports: |
| 775 | iounmap(priv->reports); |
| 776 | out_unmap_ctrl: |
| 777 | iounmap(priv->ctrl); |
| 778 | out_unmap_vram: |
| 779 | iounmap(priv->ddr_base); |
| 780 | out_free_context: |
| 781 | lv1_gpu_context_free(priv->context_handle); |
| 782 | out_free_memory: |
| 783 | lv1_gpu_memory_free(priv->memory_handle); |
| 784 | out_close_gpu: |
| 785 | ps3_close_hv_device(dev); |
| 786 | out_free_xdr_buf: |
| 787 | free_pages((unsigned long) priv->xdr_buf, get_order(XDR_BUF_SIZE)); |
| 788 | fail_free_priv: |
| 789 | kfree(priv); |
| 790 | dev->core.driver_data = NULL; |
| 791 | fail: |
| 792 | return error; |
| 793 | } |
| 794 | |
| 795 | static int ps3vram_remove(struct ps3_system_bus_device *dev) |
| 796 | { |
| 797 | struct ps3vram_priv *priv = dev->core.driver_data; |
| 798 | |
| 799 | del_gendisk(priv->gendisk); |
| 800 | put_disk(priv->gendisk); |
| 801 | blk_cleanup_queue(priv->queue); |
| 802 | remove_proc_entry(DEVICE_NAME, NULL); |
| 803 | ps3vram_cache_cleanup(dev); |
| 804 | iounmap(priv->reports); |
| 805 | iounmap(priv->ctrl); |
| 806 | iounmap(priv->ddr_base); |
| 807 | lv1_gpu_context_free(priv->context_handle); |
| 808 | lv1_gpu_memory_free(priv->memory_handle); |
| 809 | ps3_close_hv_device(dev); |
| 810 | free_pages((unsigned long) priv->xdr_buf, get_order(XDR_BUF_SIZE)); |
| 811 | kfree(priv); |
| 812 | dev->core.driver_data = NULL; |
| 813 | return 0; |
| 814 | } |
| 815 | |
| 816 | static struct ps3_system_bus_driver ps3vram = { |
| 817 | .match_id = PS3_MATCH_ID_GPU, |
| 818 | .match_sub_id = PS3_MATCH_SUB_ID_GPU_RAMDISK, |
| 819 | .core.name = DEVICE_NAME, |
| 820 | .core.owner = THIS_MODULE, |
| 821 | .probe = ps3vram_probe, |
| 822 | .remove = ps3vram_remove, |
| 823 | .shutdown = ps3vram_remove, |
| 824 | }; |
| 825 | |
| 826 | |
| 827 | static int __init ps3vram_init(void) |
| 828 | { |
| 829 | int error; |
| 830 | |
| 831 | if (!firmware_has_feature(FW_FEATURE_PS3_LV1)) |
| 832 | return -ENODEV; |
| 833 | |
| 834 | error = register_blkdev(0, DEVICE_NAME); |
| 835 | if (error <= 0) { |
| 836 | pr_err("%s: register_blkdev failed %d\n", DEVICE_NAME, error); |
| 837 | return error; |
| 838 | } |
| 839 | ps3vram_major = error; |
| 840 | |
| 841 | pr_info("%s: registered block device major %d\n", DEVICE_NAME, |
| 842 | ps3vram_major); |
| 843 | |
| 844 | error = ps3_system_bus_driver_register(&ps3vram); |
| 845 | if (error) |
| 846 | unregister_blkdev(ps3vram_major, DEVICE_NAME); |
| 847 | |
| 848 | return error; |
| 849 | } |
| 850 | |
| 851 | static void __exit ps3vram_exit(void) |
| 852 | { |
| 853 | ps3_system_bus_driver_unregister(&ps3vram); |
| 854 | unregister_blkdev(ps3vram_major, DEVICE_NAME); |
| 855 | } |
| 856 | |
| 857 | module_init(ps3vram_init); |
| 858 | module_exit(ps3vram_exit); |
| 859 | |
| 860 | MODULE_LICENSE("GPL"); |
| 861 | MODULE_DESCRIPTION("PS3 Video RAM Storage Driver"); |
| 862 | MODULE_AUTHOR("Sony Corporation"); |
| 863 | MODULE_ALIAS(PS3_MODULE_ALIAS_GPU_RAMDISK); |