| 1 | /* |
| 2 | * Copyright © 2008-2012 Intel Corporation |
| 3 | * |
| 4 | * Permission is hereby granted, free of charge, to any person obtaining a |
| 5 | * copy of this software and associated documentation files (the "Software"), |
| 6 | * to deal in the Software without restriction, including without limitation |
| 7 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, |
| 8 | * and/or sell copies of the Software, and to permit persons to whom the |
| 9 | * Software is furnished to do so, subject to the following conditions: |
| 10 | * |
| 11 | * The above copyright notice and this permission notice (including the next |
| 12 | * paragraph) shall be included in all copies or substantial portions of the |
| 13 | * Software. |
| 14 | * |
| 15 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| 16 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| 17 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
| 18 | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| 19 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING |
| 20 | * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS |
| 21 | * IN THE SOFTWARE. |
| 22 | * |
| 23 | * Authors: |
| 24 | * Eric Anholt <eric@anholt.net> |
| 25 | * Chris Wilson <chris@chris-wilson.co.uk> |
| 26 | * |
| 27 | */ |
| 28 | |
| 29 | #include <drm/drmP.h> |
| 30 | #include <drm/i915_drm.h> |
| 31 | #include "i915_drv.h" |
| 32 | |
| 33 | /* |
| 34 | * The BIOS typically reserves some of the system's memory for the exclusive |
| 35 | * use of the integrated graphics. This memory is no longer available for |
| 36 | * use by the OS and so the user finds that his system has less memory |
| 37 | * available than he put in. We refer to this memory as stolen. |
| 38 | * |
| 39 | * The BIOS will allocate its framebuffer from the stolen memory. Our |
| 40 | * goal is try to reuse that object for our own fbcon which must always |
| 41 | * be available for panics. Anything else we can reuse the stolen memory |
| 42 | * for is a boon. |
| 43 | */ |
| 44 | |
| 45 | static unsigned long i915_stolen_to_physical(struct drm_device *dev) |
| 46 | { |
| 47 | struct drm_i915_private *dev_priv = dev->dev_private; |
| 48 | struct resource *r; |
| 49 | u32 base; |
| 50 | |
| 51 | /* Almost universally we can find the Graphics Base of Stolen Memory |
| 52 | * at offset 0x5c in the igfx configuration space. On a few (desktop) |
| 53 | * machines this is also mirrored in the bridge device at different |
| 54 | * locations, or in the MCHBAR. On gen2, the layout is again slightly |
| 55 | * different with the Graphics Segment immediately following Top of |
| 56 | * Memory (or Top of Usable DRAM). Note it appears that TOUD is only |
| 57 | * reported by 865g, so we just use the top of memory as determined |
| 58 | * by the e820 probe. |
| 59 | * |
| 60 | * XXX However gen2 requires an unavailable symbol. |
| 61 | */ |
| 62 | base = 0; |
| 63 | if (INTEL_INFO(dev)->gen >= 3) { |
| 64 | /* Read Graphics Base of Stolen Memory directly */ |
| 65 | pci_read_config_dword(dev->pdev, 0x5c, &base); |
| 66 | base &= ~((1<<20) - 1); |
| 67 | } else { /* GEN2 */ |
| 68 | #if 0 |
| 69 | /* Stolen is immediately above Top of Memory */ |
| 70 | base = max_low_pfn_mapped << PAGE_SHIFT; |
| 71 | #endif |
| 72 | } |
| 73 | |
| 74 | if (base == 0) |
| 75 | return 0; |
| 76 | |
| 77 | /* make sure we don't clobber the GTT if it's within stolen memory */ |
| 78 | if (INTEL_INFO(dev)->gen <= 4 && !IS_G33(dev) && !IS_G4X(dev)) { |
| 79 | struct { |
| 80 | u32 start, end; |
| 81 | } stolen[2] = { |
| 82 | { .start = base, .end = base + dev_priv->gtt.stolen_size, }, |
| 83 | { .start = base, .end = base + dev_priv->gtt.stolen_size, }, |
| 84 | }; |
| 85 | u64 gtt_start, gtt_end; |
| 86 | |
| 87 | gtt_start = I915_READ(PGTBL_CTL); |
| 88 | if (IS_GEN4(dev)) |
| 89 | gtt_start = (gtt_start & PGTBL_ADDRESS_LO_MASK) | |
| 90 | (gtt_start & PGTBL_ADDRESS_HI_MASK) << 28; |
| 91 | else |
| 92 | gtt_start &= PGTBL_ADDRESS_LO_MASK; |
| 93 | gtt_end = gtt_start + gtt_total_entries(dev_priv->gtt) * 4; |
| 94 | |
| 95 | if (gtt_start >= stolen[0].start && gtt_start < stolen[0].end) |
| 96 | stolen[0].end = gtt_start; |
| 97 | if (gtt_end > stolen[1].start && gtt_end <= stolen[1].end) |
| 98 | stolen[1].start = gtt_end; |
| 99 | |
| 100 | /* pick the larger of the two chunks */ |
| 101 | if (stolen[0].end - stolen[0].start > |
| 102 | stolen[1].end - stolen[1].start) { |
| 103 | base = stolen[0].start; |
| 104 | dev_priv->gtt.stolen_size = stolen[0].end - stolen[0].start; |
| 105 | } else { |
| 106 | base = stolen[1].start; |
| 107 | dev_priv->gtt.stolen_size = stolen[1].end - stolen[1].start; |
| 108 | } |
| 109 | |
| 110 | if (stolen[0].start != stolen[1].start || |
| 111 | stolen[0].end != stolen[1].end) { |
| 112 | DRM_DEBUG_KMS("GTT within stolen memory at 0x%llx-0x%llx\n", |
| 113 | (unsigned long long) gtt_start, |
| 114 | (unsigned long long) gtt_end - 1); |
| 115 | DRM_DEBUG_KMS("Stolen memory adjusted to 0x%x-0x%x\n", |
| 116 | base, base + (u32) dev_priv->gtt.stolen_size - 1); |
| 117 | } |
| 118 | } |
| 119 | |
| 120 | |
| 121 | /* Verify that nothing else uses this physical address. Stolen |
| 122 | * memory should be reserved by the BIOS and hidden from the |
| 123 | * kernel. So if the region is already marked as busy, something |
| 124 | * is seriously wrong. |
| 125 | */ |
| 126 | r = devm_request_mem_region(dev->dev, base, dev_priv->gtt.stolen_size, |
| 127 | "Graphics Stolen Memory"); |
| 128 | if (r == NULL) { |
| 129 | /* |
| 130 | * One more attempt but this time requesting region from |
| 131 | * base + 1, as we have seen that this resolves the region |
| 132 | * conflict with the PCI Bus. |
| 133 | * This is a BIOS w/a: Some BIOS wrap stolen in the root |
| 134 | * PCI bus, but have an off-by-one error. Hence retry the |
| 135 | * reservation starting from 1 instead of 0. |
| 136 | */ |
| 137 | r = devm_request_mem_region(dev->dev, base + 1, |
| 138 | dev_priv->gtt.stolen_size - 1, |
| 139 | "Graphics Stolen Memory"); |
| 140 | /* |
| 141 | * GEN3 firmware likes to smash pci bridges into the stolen |
| 142 | * range. Apparently this works. |
| 143 | */ |
| 144 | if (r == NULL && !IS_GEN3(dev)) { |
| 145 | DRM_ERROR("conflict detected with stolen region: [0x%08x - 0x%08x]\n", |
| 146 | base, base + (uint32_t)dev_priv->gtt.stolen_size); |
| 147 | base = 0; |
| 148 | } |
| 149 | } |
| 150 | |
| 151 | return base; |
| 152 | } |
| 153 | |
| 154 | static int find_compression_threshold(struct drm_device *dev, |
| 155 | struct drm_mm_node *node, |
| 156 | int size, |
| 157 | int fb_cpp) |
| 158 | { |
| 159 | struct drm_i915_private *dev_priv = dev->dev_private; |
| 160 | int compression_threshold = 1; |
| 161 | int ret; |
| 162 | |
| 163 | /* HACK: This code depends on what we will do in *_enable_fbc. If that |
| 164 | * code changes, this code needs to change as well. |
| 165 | * |
| 166 | * The enable_fbc code will attempt to use one of our 2 compression |
| 167 | * thresholds, therefore, in that case, we only have 1 resort. |
| 168 | */ |
| 169 | |
| 170 | /* Try to over-allocate to reduce reallocations and fragmentation. */ |
| 171 | ret = drm_mm_insert_node(&dev_priv->mm.stolen, node, |
| 172 | size <<= 1, 4096, DRM_MM_SEARCH_DEFAULT); |
| 173 | if (ret == 0) |
| 174 | return compression_threshold; |
| 175 | |
| 176 | again: |
| 177 | /* HW's ability to limit the CFB is 1:4 */ |
| 178 | if (compression_threshold > 4 || |
| 179 | (fb_cpp == 2 && compression_threshold == 2)) |
| 180 | return 0; |
| 181 | |
| 182 | ret = drm_mm_insert_node(&dev_priv->mm.stolen, node, |
| 183 | size >>= 1, 4096, |
| 184 | DRM_MM_SEARCH_DEFAULT); |
| 185 | if (ret && INTEL_INFO(dev)->gen <= 4) { |
| 186 | return 0; |
| 187 | } else if (ret) { |
| 188 | compression_threshold <<= 1; |
| 189 | goto again; |
| 190 | } else { |
| 191 | return compression_threshold; |
| 192 | } |
| 193 | } |
| 194 | |
| 195 | static int i915_setup_compression(struct drm_device *dev, int size, int fb_cpp) |
| 196 | { |
| 197 | struct drm_i915_private *dev_priv = dev->dev_private; |
| 198 | struct drm_mm_node *uninitialized_var(compressed_llb); |
| 199 | int ret; |
| 200 | |
| 201 | ret = find_compression_threshold(dev, &dev_priv->fbc.compressed_fb, |
| 202 | size, fb_cpp); |
| 203 | if (!ret) |
| 204 | goto err_llb; |
| 205 | else if (ret > 1) { |
| 206 | DRM_INFO("Reducing the compressed framebuffer size. This may lead to less power savings than a non-reduced-size. Try to increase stolen memory size if available in BIOS.\n"); |
| 207 | |
| 208 | } |
| 209 | |
| 210 | dev_priv->fbc.threshold = ret; |
| 211 | |
| 212 | if (INTEL_INFO(dev_priv)->gen >= 5) |
| 213 | I915_WRITE(ILK_DPFC_CB_BASE, dev_priv->fbc.compressed_fb.start); |
| 214 | else if (IS_GM45(dev)) { |
| 215 | I915_WRITE(DPFC_CB_BASE, dev_priv->fbc.compressed_fb.start); |
| 216 | } else { |
| 217 | compressed_llb = kzalloc(sizeof(*compressed_llb), GFP_KERNEL); |
| 218 | if (!compressed_llb) |
| 219 | goto err_fb; |
| 220 | |
| 221 | ret = drm_mm_insert_node(&dev_priv->mm.stolen, compressed_llb, |
| 222 | 4096, 4096, DRM_MM_SEARCH_DEFAULT); |
| 223 | if (ret) |
| 224 | goto err_fb; |
| 225 | |
| 226 | dev_priv->fbc.compressed_llb = compressed_llb; |
| 227 | |
| 228 | I915_WRITE(FBC_CFB_BASE, |
| 229 | dev_priv->mm.stolen_base + dev_priv->fbc.compressed_fb.start); |
| 230 | I915_WRITE(FBC_LL_BASE, |
| 231 | dev_priv->mm.stolen_base + compressed_llb->start); |
| 232 | } |
| 233 | |
| 234 | dev_priv->fbc.uncompressed_size = size; |
| 235 | |
| 236 | DRM_DEBUG_KMS("reserved %d bytes of contiguous stolen space for FBC\n", |
| 237 | size); |
| 238 | |
| 239 | return 0; |
| 240 | |
| 241 | err_fb: |
| 242 | kfree(compressed_llb); |
| 243 | drm_mm_remove_node(&dev_priv->fbc.compressed_fb); |
| 244 | err_llb: |
| 245 | pr_info_once("drm: not enough stolen space for compressed buffer (need %d more bytes), disabling. Hint: you may be able to increase stolen memory size in the BIOS to avoid this.\n", size); |
| 246 | return -ENOSPC; |
| 247 | } |
| 248 | |
| 249 | int i915_gem_stolen_setup_compression(struct drm_device *dev, int size, int fb_cpp) |
| 250 | { |
| 251 | struct drm_i915_private *dev_priv = dev->dev_private; |
| 252 | |
| 253 | if (!drm_mm_initialized(&dev_priv->mm.stolen)) |
| 254 | return -ENODEV; |
| 255 | |
| 256 | if (size <= dev_priv->fbc.uncompressed_size) |
| 257 | return 0; |
| 258 | |
| 259 | /* Release any current block */ |
| 260 | i915_gem_stolen_cleanup_compression(dev); |
| 261 | |
| 262 | return i915_setup_compression(dev, size, fb_cpp); |
| 263 | } |
| 264 | |
| 265 | void i915_gem_stolen_cleanup_compression(struct drm_device *dev) |
| 266 | { |
| 267 | struct drm_i915_private *dev_priv = dev->dev_private; |
| 268 | |
| 269 | if (dev_priv->fbc.uncompressed_size == 0) |
| 270 | return; |
| 271 | |
| 272 | drm_mm_remove_node(&dev_priv->fbc.compressed_fb); |
| 273 | |
| 274 | if (dev_priv->fbc.compressed_llb) { |
| 275 | drm_mm_remove_node(dev_priv->fbc.compressed_llb); |
| 276 | kfree(dev_priv->fbc.compressed_llb); |
| 277 | } |
| 278 | |
| 279 | dev_priv->fbc.uncompressed_size = 0; |
| 280 | } |
| 281 | |
| 282 | void i915_gem_cleanup_stolen(struct drm_device *dev) |
| 283 | { |
| 284 | struct drm_i915_private *dev_priv = dev->dev_private; |
| 285 | |
| 286 | if (!drm_mm_initialized(&dev_priv->mm.stolen)) |
| 287 | return; |
| 288 | |
| 289 | i915_gem_stolen_cleanup_compression(dev); |
| 290 | drm_mm_takedown(&dev_priv->mm.stolen); |
| 291 | } |
| 292 | |
| 293 | int i915_gem_init_stolen(struct drm_device *dev) |
| 294 | { |
| 295 | struct drm_i915_private *dev_priv = dev->dev_private; |
| 296 | u32 tmp; |
| 297 | int bios_reserved = 0; |
| 298 | |
| 299 | #ifdef CONFIG_INTEL_IOMMU |
| 300 | if (intel_iommu_gfx_mapped && INTEL_INFO(dev)->gen < 8) { |
| 301 | DRM_INFO("DMAR active, disabling use of stolen memory\n"); |
| 302 | return 0; |
| 303 | } |
| 304 | #endif |
| 305 | |
| 306 | if (dev_priv->gtt.stolen_size == 0) |
| 307 | return 0; |
| 308 | |
| 309 | dev_priv->mm.stolen_base = i915_stolen_to_physical(dev); |
| 310 | if (dev_priv->mm.stolen_base == 0) |
| 311 | return 0; |
| 312 | |
| 313 | DRM_DEBUG_KMS("found %zd bytes of stolen memory at %08lx\n", |
| 314 | dev_priv->gtt.stolen_size, dev_priv->mm.stolen_base); |
| 315 | |
| 316 | if (INTEL_INFO(dev)->gen >= 8) { |
| 317 | tmp = I915_READ(GEN7_BIOS_RESERVED); |
| 318 | tmp >>= GEN8_BIOS_RESERVED_SHIFT; |
| 319 | tmp &= GEN8_BIOS_RESERVED_MASK; |
| 320 | bios_reserved = (1024*1024) << tmp; |
| 321 | } else if (IS_GEN7(dev)) { |
| 322 | tmp = I915_READ(GEN7_BIOS_RESERVED); |
| 323 | bios_reserved = tmp & GEN7_BIOS_RESERVED_256K ? |
| 324 | 256*1024 : 1024*1024; |
| 325 | } |
| 326 | |
| 327 | if (WARN_ON(bios_reserved > dev_priv->gtt.stolen_size)) |
| 328 | return 0; |
| 329 | |
| 330 | /* Basic memrange allocator for stolen space */ |
| 331 | drm_mm_init(&dev_priv->mm.stolen, 0, dev_priv->gtt.stolen_size - |
| 332 | bios_reserved); |
| 333 | |
| 334 | return 0; |
| 335 | } |
| 336 | |
| 337 | static struct sg_table * |
| 338 | i915_pages_create_for_stolen(struct drm_device *dev, |
| 339 | u32 offset, u32 size) |
| 340 | { |
| 341 | struct drm_i915_private *dev_priv = dev->dev_private; |
| 342 | struct sg_table *st; |
| 343 | struct scatterlist *sg; |
| 344 | |
| 345 | DRM_DEBUG_DRIVER("offset=0x%x, size=%d\n", offset, size); |
| 346 | BUG_ON(offset > dev_priv->gtt.stolen_size - size); |
| 347 | |
| 348 | /* We hide that we have no struct page backing our stolen object |
| 349 | * by wrapping the contiguous physical allocation with a fake |
| 350 | * dma mapping in a single scatterlist. |
| 351 | */ |
| 352 | |
| 353 | st = kmalloc(sizeof(*st), GFP_KERNEL); |
| 354 | if (st == NULL) |
| 355 | return NULL; |
| 356 | |
| 357 | if (sg_alloc_table(st, 1, GFP_KERNEL)) { |
| 358 | kfree(st); |
| 359 | return NULL; |
| 360 | } |
| 361 | |
| 362 | sg = st->sgl; |
| 363 | sg->offset = 0; |
| 364 | sg->length = size; |
| 365 | |
| 366 | sg_dma_address(sg) = (dma_addr_t)dev_priv->mm.stolen_base + offset; |
| 367 | sg_dma_len(sg) = size; |
| 368 | |
| 369 | return st; |
| 370 | } |
| 371 | |
| 372 | static int i915_gem_object_get_pages_stolen(struct drm_i915_gem_object *obj) |
| 373 | { |
| 374 | BUG(); |
| 375 | return -EINVAL; |
| 376 | } |
| 377 | |
| 378 | static void i915_gem_object_put_pages_stolen(struct drm_i915_gem_object *obj) |
| 379 | { |
| 380 | /* Should only be called during free */ |
| 381 | sg_free_table(obj->pages); |
| 382 | kfree(obj->pages); |
| 383 | } |
| 384 | |
| 385 | |
| 386 | static void |
| 387 | i915_gem_object_release_stolen(struct drm_i915_gem_object *obj) |
| 388 | { |
| 389 | if (obj->stolen) { |
| 390 | drm_mm_remove_node(obj->stolen); |
| 391 | kfree(obj->stolen); |
| 392 | obj->stolen = NULL; |
| 393 | } |
| 394 | } |
| 395 | static const struct drm_i915_gem_object_ops i915_gem_object_stolen_ops = { |
| 396 | .get_pages = i915_gem_object_get_pages_stolen, |
| 397 | .put_pages = i915_gem_object_put_pages_stolen, |
| 398 | .release = i915_gem_object_release_stolen, |
| 399 | }; |
| 400 | |
| 401 | static struct drm_i915_gem_object * |
| 402 | _i915_gem_object_create_stolen(struct drm_device *dev, |
| 403 | struct drm_mm_node *stolen) |
| 404 | { |
| 405 | struct drm_i915_gem_object *obj; |
| 406 | |
| 407 | obj = i915_gem_object_alloc(dev); |
| 408 | if (obj == NULL) |
| 409 | return NULL; |
| 410 | |
| 411 | drm_gem_private_object_init(dev, &obj->base, stolen->size); |
| 412 | i915_gem_object_init(obj, &i915_gem_object_stolen_ops); |
| 413 | |
| 414 | obj->pages = i915_pages_create_for_stolen(dev, |
| 415 | stolen->start, stolen->size); |
| 416 | if (obj->pages == NULL) |
| 417 | goto cleanup; |
| 418 | |
| 419 | obj->has_dma_mapping = true; |
| 420 | i915_gem_object_pin_pages(obj); |
| 421 | obj->stolen = stolen; |
| 422 | |
| 423 | obj->base.read_domains = I915_GEM_DOMAIN_CPU | I915_GEM_DOMAIN_GTT; |
| 424 | obj->cache_level = HAS_LLC(dev) ? I915_CACHE_LLC : I915_CACHE_NONE; |
| 425 | |
| 426 | return obj; |
| 427 | |
| 428 | cleanup: |
| 429 | i915_gem_object_free(obj); |
| 430 | return NULL; |
| 431 | } |
| 432 | |
| 433 | struct drm_i915_gem_object * |
| 434 | i915_gem_object_create_stolen(struct drm_device *dev, u32 size) |
| 435 | { |
| 436 | struct drm_i915_private *dev_priv = dev->dev_private; |
| 437 | struct drm_i915_gem_object *obj; |
| 438 | struct drm_mm_node *stolen; |
| 439 | int ret; |
| 440 | |
| 441 | if (!drm_mm_initialized(&dev_priv->mm.stolen)) |
| 442 | return NULL; |
| 443 | |
| 444 | DRM_DEBUG_KMS("creating stolen object: size=%x\n", size); |
| 445 | if (size == 0) |
| 446 | return NULL; |
| 447 | |
| 448 | stolen = kzalloc(sizeof(*stolen), GFP_KERNEL); |
| 449 | if (!stolen) |
| 450 | return NULL; |
| 451 | |
| 452 | ret = drm_mm_insert_node(&dev_priv->mm.stolen, stolen, size, |
| 453 | 4096, DRM_MM_SEARCH_DEFAULT); |
| 454 | if (ret) { |
| 455 | kfree(stolen); |
| 456 | return NULL; |
| 457 | } |
| 458 | |
| 459 | obj = _i915_gem_object_create_stolen(dev, stolen); |
| 460 | if (obj) |
| 461 | return obj; |
| 462 | |
| 463 | drm_mm_remove_node(stolen); |
| 464 | kfree(stolen); |
| 465 | return NULL; |
| 466 | } |
| 467 | |
| 468 | struct drm_i915_gem_object * |
| 469 | i915_gem_object_create_stolen_for_preallocated(struct drm_device *dev, |
| 470 | u32 stolen_offset, |
| 471 | u32 gtt_offset, |
| 472 | u32 size) |
| 473 | { |
| 474 | struct drm_i915_private *dev_priv = dev->dev_private; |
| 475 | struct i915_address_space *ggtt = &dev_priv->gtt.base; |
| 476 | struct drm_i915_gem_object *obj; |
| 477 | struct drm_mm_node *stolen; |
| 478 | struct i915_vma *vma; |
| 479 | int ret; |
| 480 | |
| 481 | if (!drm_mm_initialized(&dev_priv->mm.stolen)) |
| 482 | return NULL; |
| 483 | |
| 484 | DRM_DEBUG_KMS("creating preallocated stolen object: stolen_offset=%x, gtt_offset=%x, size=%x\n", |
| 485 | stolen_offset, gtt_offset, size); |
| 486 | |
| 487 | /* KISS and expect everything to be page-aligned */ |
| 488 | if (WARN_ON(size == 0) || WARN_ON(size & 4095) || |
| 489 | WARN_ON(stolen_offset & 4095)) |
| 490 | return NULL; |
| 491 | |
| 492 | stolen = kzalloc(sizeof(*stolen), GFP_KERNEL); |
| 493 | if (!stolen) |
| 494 | return NULL; |
| 495 | |
| 496 | stolen->start = stolen_offset; |
| 497 | stolen->size = size; |
| 498 | ret = drm_mm_reserve_node(&dev_priv->mm.stolen, stolen); |
| 499 | if (ret) { |
| 500 | DRM_DEBUG_KMS("failed to allocate stolen space\n"); |
| 501 | kfree(stolen); |
| 502 | return NULL; |
| 503 | } |
| 504 | |
| 505 | obj = _i915_gem_object_create_stolen(dev, stolen); |
| 506 | if (obj == NULL) { |
| 507 | DRM_DEBUG_KMS("failed to allocate stolen object\n"); |
| 508 | drm_mm_remove_node(stolen); |
| 509 | kfree(stolen); |
| 510 | return NULL; |
| 511 | } |
| 512 | |
| 513 | /* Some objects just need physical mem from stolen space */ |
| 514 | if (gtt_offset == I915_GTT_OFFSET_NONE) |
| 515 | return obj; |
| 516 | |
| 517 | vma = i915_gem_obj_lookup_or_create_vma(obj, ggtt); |
| 518 | if (IS_ERR(vma)) { |
| 519 | ret = PTR_ERR(vma); |
| 520 | goto err_out; |
| 521 | } |
| 522 | |
| 523 | /* To simplify the initialisation sequence between KMS and GTT, |
| 524 | * we allow construction of the stolen object prior to |
| 525 | * setting up the GTT space. The actual reservation will occur |
| 526 | * later. |
| 527 | */ |
| 528 | vma->node.start = gtt_offset; |
| 529 | vma->node.size = size; |
| 530 | if (drm_mm_initialized(&ggtt->mm)) { |
| 531 | ret = drm_mm_reserve_node(&ggtt->mm, &vma->node); |
| 532 | if (ret) { |
| 533 | DRM_DEBUG_KMS("failed to allocate stolen GTT space\n"); |
| 534 | goto err_vma; |
| 535 | } |
| 536 | } |
| 537 | |
| 538 | vma->bound |= GLOBAL_BIND; |
| 539 | |
| 540 | list_add_tail(&obj->global_list, &dev_priv->mm.bound_list); |
| 541 | list_add_tail(&vma->mm_list, &ggtt->inactive_list); |
| 542 | i915_gem_object_pin_pages(obj); |
| 543 | |
| 544 | return obj; |
| 545 | |
| 546 | err_vma: |
| 547 | i915_gem_vma_destroy(vma); |
| 548 | err_out: |
| 549 | drm_mm_remove_node(stolen); |
| 550 | kfree(stolen); |
| 551 | drm_gem_object_unreference(&obj->base); |
| 552 | return NULL; |
| 553 | } |