1 /* 2 * Copyright 2009 Jerome Glisse. 3 * All Rights Reserved. 4 * 5 * Permission is hereby granted, free of charge, to any person obtaining a 6 * copy of this software and associated documentation files (the 7 * "Software"), to deal in the Software without restriction, including 8 * without limitation the rights to use, copy, modify, merge, publish, 9 * distribute, sub license, and/or sell copies of the Software, and to 10 * permit persons to whom the Software is furnished to do so, subject to 11 * the following conditions: 12 * 13 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 14 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 15 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL 16 * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, 17 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR 18 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE 19 * USE OR OTHER DEALINGS IN THE SOFTWARE. 20 * 21 * The above copyright notice and this permission notice (including the 22 * next paragraph) shall be included in all copies or substantial portions 23 * of the Software. 24 * 25 */ 26 /* 27 * Authors: 28 * Jerome Glisse <glisse@freedesktop.org> 29 * Thomas Hellstrom <thomas-at-tungstengraphics-dot-com> 30 * Dave Airlie 31 */ 32 33 #include <linux/io.h> 34 #include <linux/list.h> 35 #include <linux/slab.h> 36 37 #include <drm/drm_cache.h> 38 #include <drm/drm_prime.h> 39 #include <drm/radeon_drm.h> 40 41 #include "radeon.h" 42 #include "radeon_trace.h" 43 #include "radeon_ttm.h" 44 45 static void radeon_bo_clear_surface_reg(struct radeon_bo *bo); 46 47 /* 48 * To exclude mutual BO access we rely on bo_reserve exclusion, as all 49 * function are calling it. 50 */ 51 52 static void radeon_ttm_bo_destroy(struct ttm_buffer_object *tbo) 53 { 54 struct radeon_bo *bo; 55 56 bo = container_of(tbo, struct radeon_bo, tbo); 57 58 mutex_lock(&bo->rdev->gem.mutex); 59 list_del_init(&bo->list); 60 mutex_unlock(&bo->rdev->gem.mutex); 61 radeon_bo_clear_surface_reg(bo); 62 WARN_ON_ONCE(!list_empty(&bo->va)); 63 if (bo->tbo.base.import_attach) 64 drm_prime_gem_destroy(&bo->tbo.base, bo->tbo.sg); 65 drm_gem_object_release(&bo->tbo.base); 66 pool_put(&bo->rdev->ddev->objpl, bo); 67 } 68 69 bool radeon_ttm_bo_is_radeon_bo(struct ttm_buffer_object *bo) 70 { 71 if (bo->destroy == &radeon_ttm_bo_destroy) 72 return true; 73 return false; 74 } 75 76 void radeon_ttm_placement_from_domain(struct radeon_bo *rbo, u32 domain) 77 { 78 u32 c = 0, i; 79 80 rbo->placement.placement = rbo->placements; 81 rbo->placement.busy_placement = rbo->placements; 82 if (domain & RADEON_GEM_DOMAIN_VRAM) { 83 /* Try placing BOs which don't need CPU access outside of the 84 * CPU accessible part of VRAM 85 */ 86 if ((rbo->flags & RADEON_GEM_NO_CPU_ACCESS) && 87 rbo->rdev->mc.visible_vram_size < rbo->rdev->mc.real_vram_size) { 88 rbo->placements[c].fpfn = 89 rbo->rdev->mc.visible_vram_size >> PAGE_SHIFT; 90 rbo->placements[c].mem_type = TTM_PL_VRAM; 91 rbo->placements[c++].flags = 0; 92 } 93 94 rbo->placements[c].fpfn = 0; 95 rbo->placements[c].mem_type = TTM_PL_VRAM; 96 rbo->placements[c++].flags = 0; 97 } 98 99 if (domain & RADEON_GEM_DOMAIN_GTT) { 100 rbo->placements[c].fpfn = 0; 101 rbo->placements[c].mem_type = TTM_PL_TT; 102 rbo->placements[c++].flags = 0; 103 } 104 105 if (domain & RADEON_GEM_DOMAIN_CPU) { 106 rbo->placements[c].fpfn = 0; 107 rbo->placements[c].mem_type = TTM_PL_SYSTEM; 108 rbo->placements[c++].flags = 0; 109 } 110 if (!c) { 111 rbo->placements[c].fpfn = 0; 112 rbo->placements[c].mem_type = TTM_PL_SYSTEM; 113 rbo->placements[c++].flags = 0; 114 } 115 116 rbo->placement.num_placement = c; 117 rbo->placement.num_busy_placement = c; 118 119 for (i = 0; i < c; ++i) { 120 if ((rbo->flags & RADEON_GEM_CPU_ACCESS) && 121 (rbo->placements[i].mem_type == TTM_PL_VRAM) && 122 !rbo->placements[i].fpfn) 123 rbo->placements[i].lpfn = 124 rbo->rdev->mc.visible_vram_size >> PAGE_SHIFT; 125 else 126 rbo->placements[i].lpfn = 0; 127 } 128 } 129 130 int radeon_bo_create(struct radeon_device *rdev, 131 unsigned long size, int byte_align, bool kernel, 132 u32 domain, u32 flags, struct sg_table *sg, 133 struct dma_resv *resv, 134 struct radeon_bo **bo_ptr) 135 { 136 struct radeon_bo *bo; 137 enum ttm_bo_type type; 138 unsigned long page_align = roundup(byte_align, PAGE_SIZE) >> PAGE_SHIFT; 139 int r; 140 141 size = ALIGN(size, PAGE_SIZE); 142 143 if (kernel) { 144 type = ttm_bo_type_kernel; 145 } else if (sg) { 146 type = ttm_bo_type_sg; 147 } else { 148 type = ttm_bo_type_device; 149 } 150 *bo_ptr = NULL; 151 152 bo = pool_get(&rdev->ddev->objpl, PR_WAITOK | PR_ZERO); 153 if (bo == NULL) 154 return -ENOMEM; 155 drm_gem_private_object_init(rdev_to_drm(rdev), &bo->tbo.base, size); 156 bo->rdev = rdev; 157 bo->surface_reg = -1; 158 INIT_LIST_HEAD(&bo->list); 159 INIT_LIST_HEAD(&bo->va); 160 bo->initial_domain = domain & (RADEON_GEM_DOMAIN_VRAM | 161 RADEON_GEM_DOMAIN_GTT | 162 RADEON_GEM_DOMAIN_CPU); 163 164 bo->flags = flags; 165 /* PCI GART is always snooped */ 166 if (!(rdev->flags & RADEON_IS_PCIE)) 167 bo->flags &= ~(RADEON_GEM_GTT_WC | RADEON_GEM_GTT_UC); 168 169 /* Write-combined CPU mappings of GTT cause GPU hangs with RV6xx 170 * See https://bugs.freedesktop.org/show_bug.cgi?id=91268 171 */ 172 if (rdev->family >= CHIP_RV610 && rdev->family <= CHIP_RV635) 173 bo->flags &= ~(RADEON_GEM_GTT_WC | RADEON_GEM_GTT_UC); 174 175 #ifdef CONFIG_X86_32 176 /* XXX: Write-combined CPU mappings of GTT seem broken on 32-bit 177 * See https://bugs.freedesktop.org/show_bug.cgi?id=84627 178 */ 179 bo->flags &= ~(RADEON_GEM_GTT_WC | RADEON_GEM_GTT_UC); 180 #elif defined(CONFIG_X86) && !defined(CONFIG_X86_PAT) 181 /* Don't try to enable write-combining when it can't work, or things 182 * may be slow 183 * See https://bugs.freedesktop.org/show_bug.cgi?id=88758 184 */ 185 #ifndef CONFIG_COMPILE_TEST 186 #warning Please enable CONFIG_MTRR and CONFIG_X86_PAT for better performance \ 187 thanks to write-combining 188 #endif 189 190 if (bo->flags & RADEON_GEM_GTT_WC) 191 DRM_INFO_ONCE("Please enable CONFIG_MTRR and CONFIG_X86_PAT for " 192 "better performance thanks to write-combining\n"); 193 bo->flags &= ~(RADEON_GEM_GTT_WC | RADEON_GEM_GTT_UC); 194 #else 195 /* For architectures that don't support WC memory, 196 * mask out the WC flag from the BO 197 */ 198 if (!drm_arch_can_wc_memory()) 199 bo->flags &= ~RADEON_GEM_GTT_WC; 200 #endif 201 202 radeon_ttm_placement_from_domain(bo, domain); 203 /* Kernel allocation are uninterruptible */ 204 down_read(&rdev->pm.mclk_lock); 205 r = ttm_bo_init_validate(&rdev->mman.bdev, &bo->tbo, type, 206 &bo->placement, page_align, !kernel, sg, resv, 207 &radeon_ttm_bo_destroy); 208 up_read(&rdev->pm.mclk_lock); 209 if (unlikely(r != 0)) { 210 return r; 211 } 212 *bo_ptr = bo; 213 214 trace_radeon_bo_create(bo); 215 216 return 0; 217 } 218 219 int radeon_bo_kmap(struct radeon_bo *bo, void **ptr) 220 { 221 bool is_iomem; 222 long r; 223 224 r = dma_resv_wait_timeout(bo->tbo.base.resv, DMA_RESV_USAGE_KERNEL, 225 false, MAX_SCHEDULE_TIMEOUT); 226 if (r < 0) 227 return r; 228 229 if (bo->kptr) { 230 if (ptr) { 231 *ptr = bo->kptr; 232 } 233 return 0; 234 } 235 r = ttm_bo_kmap(&bo->tbo, 0, PFN_UP(bo->tbo.base.size), &bo->kmap); 236 if (r) { 237 return r; 238 } 239 bo->kptr = ttm_kmap_obj_virtual(&bo->kmap, &is_iomem); 240 if (ptr) { 241 *ptr = bo->kptr; 242 } 243 radeon_bo_check_tiling(bo, 0, 0); 244 return 0; 245 } 246 247 void radeon_bo_kunmap(struct radeon_bo *bo) 248 { 249 if (bo->kptr == NULL) 250 return; 251 bo->kptr = NULL; 252 radeon_bo_check_tiling(bo, 0, 0); 253 ttm_bo_kunmap(&bo->kmap); 254 } 255 256 struct radeon_bo *radeon_bo_ref(struct radeon_bo *bo) 257 { 258 if (bo == NULL) 259 return NULL; 260 261 ttm_bo_get(&bo->tbo); 262 return bo; 263 } 264 265 void radeon_bo_unref(struct radeon_bo **bo) 266 { 267 struct ttm_buffer_object *tbo; 268 269 if ((*bo) == NULL) 270 return; 271 tbo = &((*bo)->tbo); 272 ttm_bo_put(tbo); 273 *bo = NULL; 274 } 275 276 int radeon_bo_pin_restricted(struct radeon_bo *bo, u32 domain, u64 max_offset, 277 u64 *gpu_addr) 278 { 279 struct ttm_operation_ctx ctx = { false, false }; 280 int r, i; 281 282 if (radeon_ttm_tt_has_userptr(bo->rdev, bo->tbo.ttm)) 283 return -EPERM; 284 285 if (bo->tbo.pin_count) { 286 ttm_bo_pin(&bo->tbo); 287 if (gpu_addr) 288 *gpu_addr = radeon_bo_gpu_offset(bo); 289 290 if (max_offset != 0) { 291 u64 domain_start; 292 293 if (domain == RADEON_GEM_DOMAIN_VRAM) 294 domain_start = bo->rdev->mc.vram_start; 295 else 296 domain_start = bo->rdev->mc.gtt_start; 297 WARN_ON_ONCE(max_offset < 298 (radeon_bo_gpu_offset(bo) - domain_start)); 299 } 300 301 return 0; 302 } 303 if (bo->prime_shared_count && domain == RADEON_GEM_DOMAIN_VRAM) { 304 /* A BO shared as a dma-buf cannot be sensibly migrated to VRAM */ 305 return -EINVAL; 306 } 307 308 radeon_ttm_placement_from_domain(bo, domain); 309 for (i = 0; i < bo->placement.num_placement; i++) { 310 /* force to pin into visible video ram */ 311 if ((bo->placements[i].mem_type == TTM_PL_VRAM) && 312 !(bo->flags & RADEON_GEM_NO_CPU_ACCESS) && 313 (!max_offset || max_offset > bo->rdev->mc.visible_vram_size)) 314 bo->placements[i].lpfn = 315 bo->rdev->mc.visible_vram_size >> PAGE_SHIFT; 316 else 317 bo->placements[i].lpfn = max_offset >> PAGE_SHIFT; 318 } 319 320 r = ttm_bo_validate(&bo->tbo, &bo->placement, &ctx); 321 if (likely(r == 0)) { 322 ttm_bo_pin(&bo->tbo); 323 if (gpu_addr != NULL) 324 *gpu_addr = radeon_bo_gpu_offset(bo); 325 if (domain == RADEON_GEM_DOMAIN_VRAM) 326 bo->rdev->vram_pin_size += radeon_bo_size(bo); 327 else 328 bo->rdev->gart_pin_size += radeon_bo_size(bo); 329 } else { 330 dev_err(bo->rdev->dev, "%p pin failed\n", bo); 331 } 332 return r; 333 } 334 335 int radeon_bo_pin(struct radeon_bo *bo, u32 domain, u64 *gpu_addr) 336 { 337 return radeon_bo_pin_restricted(bo, domain, 0, gpu_addr); 338 } 339 340 void radeon_bo_unpin(struct radeon_bo *bo) 341 { 342 ttm_bo_unpin(&bo->tbo); 343 if (!bo->tbo.pin_count) { 344 if (bo->tbo.resource->mem_type == TTM_PL_VRAM) 345 bo->rdev->vram_pin_size -= radeon_bo_size(bo); 346 else 347 bo->rdev->gart_pin_size -= radeon_bo_size(bo); 348 } 349 } 350 351 int radeon_bo_evict_vram(struct radeon_device *rdev) 352 { 353 struct ttm_device *bdev = &rdev->mman.bdev; 354 struct ttm_resource_manager *man; 355 356 /* late 2.6.33 fix IGP hibernate - we need pm ops to do this correct */ 357 #ifndef CONFIG_HIBERNATION 358 if (rdev->flags & RADEON_IS_IGP) { 359 if (rdev->mc.igp_sideport_enabled == false) 360 /* Useless to evict on IGP chips */ 361 return 0; 362 } 363 #endif 364 man = ttm_manager_type(bdev, TTM_PL_VRAM); 365 if (!man) 366 return 0; 367 return ttm_resource_manager_evict_all(bdev, man); 368 } 369 370 void radeon_bo_force_delete(struct radeon_device *rdev) 371 { 372 struct radeon_bo *bo, *n; 373 374 if (list_empty(&rdev->gem.objects)) { 375 return; 376 } 377 dev_err(rdev->dev, "Userspace still has active objects !\n"); 378 list_for_each_entry_safe(bo, n, &rdev->gem.objects, list) { 379 dev_err(rdev->dev, "%p %p %lu %lu force free\n", 380 &bo->tbo.base, bo, (unsigned long)bo->tbo.base.size, 381 *((unsigned long *)&bo->tbo.base.refcount)); 382 mutex_lock(&bo->rdev->gem.mutex); 383 list_del_init(&bo->list); 384 mutex_unlock(&bo->rdev->gem.mutex); 385 /* this should unref the ttm bo */ 386 drm_gem_object_put(&bo->tbo.base); 387 } 388 } 389 390 int radeon_bo_init(struct radeon_device *rdev) 391 { 392 paddr_t start, end; 393 394 #ifdef __linux__ 395 /* reserve PAT memory space to WC for VRAM */ 396 arch_io_reserve_memtype_wc(rdev->mc.aper_base, 397 rdev->mc.aper_size); 398 #endif 399 400 /* Add an MTRR for the VRAM */ 401 if (!rdev->fastfb_working) { 402 #ifdef __linux__ 403 rdev->mc.vram_mtrr = arch_phys_wc_add(rdev->mc.aper_base, 404 rdev->mc.aper_size); 405 #else 406 drm_mtrr_add(rdev->mc.aper_base, rdev->mc.aper_size, DRM_MTRR_WC); 407 /* fake a 'cookie', seems to be unused? */ 408 rdev->mc.vram_mtrr = 1; 409 #endif 410 } 411 412 start = atop(bus_space_mmap(rdev->memt, rdev->mc.aper_base, 0, 0, 0)); 413 end = start + atop(rdev->mc.aper_size); 414 uvm_page_physload(start, end, start, end, PHYSLOAD_DEVICE); 415 416 DRM_INFO("Detected VRAM RAM=%lluM, BAR=%lluM\n", 417 rdev->mc.mc_vram_size >> 20, 418 (unsigned long long)rdev->mc.aper_size >> 20); 419 DRM_INFO("RAM width %dbits %cDR\n", 420 rdev->mc.vram_width, rdev->mc.vram_is_ddr ? 'D' : 'S'); 421 return radeon_ttm_init(rdev); 422 } 423 424 void radeon_bo_fini(struct radeon_device *rdev) 425 { 426 radeon_ttm_fini(rdev); 427 #ifdef __linux__ 428 arch_phys_wc_del(rdev->mc.vram_mtrr); 429 arch_io_free_memtype_wc(rdev->mc.aper_base, rdev->mc.aper_size); 430 #else 431 drm_mtrr_del(0, rdev->mc.aper_base, rdev->mc.aper_size, DRM_MTRR_WC); 432 #endif 433 } 434 435 /* Returns how many bytes TTM can move per IB. 436 */ 437 static u64 radeon_bo_get_threshold_for_moves(struct radeon_device *rdev) 438 { 439 u64 real_vram_size = rdev->mc.real_vram_size; 440 struct ttm_resource_manager *man = 441 ttm_manager_type(&rdev->mman.bdev, TTM_PL_VRAM); 442 u64 vram_usage = ttm_resource_manager_usage(man); 443 444 /* This function is based on the current VRAM usage. 445 * 446 * - If all of VRAM is free, allow relocating the number of bytes that 447 * is equal to 1/4 of the size of VRAM for this IB. 448 449 * - If more than one half of VRAM is occupied, only allow relocating 450 * 1 MB of data for this IB. 451 * 452 * - From 0 to one half of used VRAM, the threshold decreases 453 * linearly. 454 * __________________ 455 * 1/4 of -|\ | 456 * VRAM | \ | 457 * | \ | 458 * | \ | 459 * | \ | 460 * | \ | 461 * | \ | 462 * | \________|1 MB 463 * |----------------| 464 * VRAM 0 % 100 % 465 * used used 466 * 467 * Note: It's a threshold, not a limit. The threshold must be crossed 468 * for buffer relocations to stop, so any buffer of an arbitrary size 469 * can be moved as long as the threshold isn't crossed before 470 * the relocation takes place. We don't want to disable buffer 471 * relocations completely. 472 * 473 * The idea is that buffers should be placed in VRAM at creation time 474 * and TTM should only do a minimum number of relocations during 475 * command submission. In practice, you need to submit at least 476 * a dozen IBs to move all buffers to VRAM if they are in GTT. 477 * 478 * Also, things can get pretty crazy under memory pressure and actual 479 * VRAM usage can change a lot, so playing safe even at 50% does 480 * consistently increase performance. 481 */ 482 483 u64 half_vram = real_vram_size >> 1; 484 u64 half_free_vram = vram_usage >= half_vram ? 0 : half_vram - vram_usage; 485 u64 bytes_moved_threshold = half_free_vram >> 1; 486 return max(bytes_moved_threshold, 1024*1024ull); 487 } 488 489 int radeon_bo_list_validate(struct radeon_device *rdev, 490 struct ww_acquire_ctx *ticket, 491 struct list_head *head, int ring) 492 { 493 struct ttm_operation_ctx ctx = { true, false }; 494 struct radeon_bo_list *lobj; 495 struct list_head duplicates; 496 int r; 497 u64 bytes_moved = 0, initial_bytes_moved; 498 u64 bytes_moved_threshold = radeon_bo_get_threshold_for_moves(rdev); 499 500 INIT_LIST_HEAD(&duplicates); 501 r = ttm_eu_reserve_buffers(ticket, head, true, &duplicates); 502 if (unlikely(r != 0)) { 503 return r; 504 } 505 506 list_for_each_entry(lobj, head, tv.head) { 507 struct radeon_bo *bo = lobj->robj; 508 if (!bo->tbo.pin_count) { 509 u32 domain = lobj->preferred_domains; 510 u32 allowed = lobj->allowed_domains; 511 u32 current_domain = 512 radeon_mem_type_to_domain(bo->tbo.resource->mem_type); 513 514 /* Check if this buffer will be moved and don't move it 515 * if we have moved too many buffers for this IB already. 516 * 517 * Note that this allows moving at least one buffer of 518 * any size, because it doesn't take the current "bo" 519 * into account. We don't want to disallow buffer moves 520 * completely. 521 */ 522 if ((allowed & current_domain) != 0 && 523 (domain & current_domain) == 0 && /* will be moved */ 524 bytes_moved > bytes_moved_threshold) { 525 /* don't move it */ 526 domain = current_domain; 527 } 528 529 retry: 530 radeon_ttm_placement_from_domain(bo, domain); 531 if (ring == R600_RING_TYPE_UVD_INDEX) 532 radeon_uvd_force_into_uvd_segment(bo, allowed); 533 534 initial_bytes_moved = atomic64_read(&rdev->num_bytes_moved); 535 r = ttm_bo_validate(&bo->tbo, &bo->placement, &ctx); 536 bytes_moved += atomic64_read(&rdev->num_bytes_moved) - 537 initial_bytes_moved; 538 539 if (unlikely(r)) { 540 if (r != -ERESTARTSYS && 541 domain != lobj->allowed_domains) { 542 domain = lobj->allowed_domains; 543 goto retry; 544 } 545 ttm_eu_backoff_reservation(ticket, head); 546 return r; 547 } 548 } 549 lobj->gpu_offset = radeon_bo_gpu_offset(bo); 550 lobj->tiling_flags = bo->tiling_flags; 551 } 552 553 list_for_each_entry(lobj, &duplicates, tv.head) { 554 lobj->gpu_offset = radeon_bo_gpu_offset(lobj->robj); 555 lobj->tiling_flags = lobj->robj->tiling_flags; 556 } 557 558 return 0; 559 } 560 561 int radeon_bo_get_surface_reg(struct radeon_bo *bo) 562 { 563 struct radeon_device *rdev = bo->rdev; 564 struct radeon_surface_reg *reg; 565 struct radeon_bo *old_object; 566 int steal; 567 int i; 568 569 dma_resv_assert_held(bo->tbo.base.resv); 570 571 if (!bo->tiling_flags) 572 return 0; 573 574 if (bo->surface_reg >= 0) { 575 i = bo->surface_reg; 576 goto out; 577 } 578 579 steal = -1; 580 for (i = 0; i < RADEON_GEM_MAX_SURFACES; i++) { 581 582 reg = &rdev->surface_regs[i]; 583 if (!reg->bo) 584 break; 585 586 old_object = reg->bo; 587 if (old_object->tbo.pin_count == 0) 588 steal = i; 589 } 590 591 /* if we are all out */ 592 if (i == RADEON_GEM_MAX_SURFACES) { 593 if (steal == -1) 594 return -ENOMEM; 595 /* find someone with a surface reg and nuke their BO */ 596 reg = &rdev->surface_regs[steal]; 597 old_object = reg->bo; 598 /* blow away the mapping */ 599 DRM_DEBUG("stealing surface reg %d from %p\n", steal, old_object); 600 ttm_bo_unmap_virtual(&old_object->tbo); 601 old_object->surface_reg = -1; 602 i = steal; 603 } 604 605 bo->surface_reg = i; 606 reg->bo = bo; 607 608 out: 609 radeon_set_surface_reg(rdev, i, bo->tiling_flags, bo->pitch, 610 bo->tbo.resource->start << PAGE_SHIFT, 611 bo->tbo.base.size); 612 return 0; 613 } 614 615 static void radeon_bo_clear_surface_reg(struct radeon_bo *bo) 616 { 617 struct radeon_device *rdev = bo->rdev; 618 struct radeon_surface_reg *reg; 619 620 if (bo->surface_reg == -1) 621 return; 622 623 reg = &rdev->surface_regs[bo->surface_reg]; 624 radeon_clear_surface_reg(rdev, bo->surface_reg); 625 626 reg->bo = NULL; 627 bo->surface_reg = -1; 628 } 629 630 int radeon_bo_set_tiling_flags(struct radeon_bo *bo, 631 uint32_t tiling_flags, uint32_t pitch) 632 { 633 struct radeon_device *rdev = bo->rdev; 634 int r; 635 636 if (rdev->family >= CHIP_CEDAR) { 637 unsigned bankw, bankh, mtaspect, tilesplit, stilesplit; 638 639 bankw = (tiling_flags >> RADEON_TILING_EG_BANKW_SHIFT) & RADEON_TILING_EG_BANKW_MASK; 640 bankh = (tiling_flags >> RADEON_TILING_EG_BANKH_SHIFT) & RADEON_TILING_EG_BANKH_MASK; 641 mtaspect = (tiling_flags >> RADEON_TILING_EG_MACRO_TILE_ASPECT_SHIFT) & RADEON_TILING_EG_MACRO_TILE_ASPECT_MASK; 642 tilesplit = (tiling_flags >> RADEON_TILING_EG_TILE_SPLIT_SHIFT) & RADEON_TILING_EG_TILE_SPLIT_MASK; 643 stilesplit = (tiling_flags >> RADEON_TILING_EG_STENCIL_TILE_SPLIT_SHIFT) & RADEON_TILING_EG_STENCIL_TILE_SPLIT_MASK; 644 switch (bankw) { 645 case 0: 646 case 1: 647 case 2: 648 case 4: 649 case 8: 650 break; 651 default: 652 return -EINVAL; 653 } 654 switch (bankh) { 655 case 0: 656 case 1: 657 case 2: 658 case 4: 659 case 8: 660 break; 661 default: 662 return -EINVAL; 663 } 664 switch (mtaspect) { 665 case 0: 666 case 1: 667 case 2: 668 case 4: 669 case 8: 670 break; 671 default: 672 return -EINVAL; 673 } 674 if (tilesplit > 6) { 675 return -EINVAL; 676 } 677 if (stilesplit > 6) { 678 return -EINVAL; 679 } 680 } 681 r = radeon_bo_reserve(bo, false); 682 if (unlikely(r != 0)) 683 return r; 684 bo->tiling_flags = tiling_flags; 685 bo->pitch = pitch; 686 radeon_bo_unreserve(bo); 687 return 0; 688 } 689 690 void radeon_bo_get_tiling_flags(struct radeon_bo *bo, 691 uint32_t *tiling_flags, 692 uint32_t *pitch) 693 { 694 dma_resv_assert_held(bo->tbo.base.resv); 695 696 if (tiling_flags) 697 *tiling_flags = bo->tiling_flags; 698 if (pitch) 699 *pitch = bo->pitch; 700 } 701 702 int radeon_bo_check_tiling(struct radeon_bo *bo, bool has_moved, 703 bool force_drop) 704 { 705 if (!force_drop) 706 dma_resv_assert_held(bo->tbo.base.resv); 707 708 if (!(bo->tiling_flags & RADEON_TILING_SURFACE)) 709 return 0; 710 711 if (force_drop) { 712 radeon_bo_clear_surface_reg(bo); 713 return 0; 714 } 715 716 if (bo->tbo.resource->mem_type != TTM_PL_VRAM) { 717 if (!has_moved) 718 return 0; 719 720 if (bo->surface_reg >= 0) 721 radeon_bo_clear_surface_reg(bo); 722 return 0; 723 } 724 725 if ((bo->surface_reg >= 0) && !has_moved) 726 return 0; 727 728 return radeon_bo_get_surface_reg(bo); 729 } 730 731 void radeon_bo_move_notify(struct ttm_buffer_object *bo) 732 { 733 struct radeon_bo *rbo; 734 735 if (!radeon_ttm_bo_is_radeon_bo(bo)) 736 return; 737 738 rbo = container_of(bo, struct radeon_bo, tbo); 739 radeon_bo_check_tiling(rbo, 0, 1); 740 radeon_vm_bo_invalidate(rbo->rdev, rbo); 741 } 742 743 vm_fault_t radeon_bo_fault_reserve_notify(struct ttm_buffer_object *bo) 744 { 745 struct ttm_operation_ctx ctx = { false, false }; 746 struct radeon_device *rdev; 747 struct radeon_bo *rbo; 748 unsigned long offset, size, lpfn; 749 int i, r; 750 751 if (!radeon_ttm_bo_is_radeon_bo(bo)) 752 return 0; 753 rbo = container_of(bo, struct radeon_bo, tbo); 754 radeon_bo_check_tiling(rbo, 0, 0); 755 rdev = rbo->rdev; 756 if (bo->resource->mem_type != TTM_PL_VRAM) 757 return 0; 758 759 size = bo->resource->size; 760 offset = bo->resource->start << PAGE_SHIFT; 761 if ((offset + size) <= rdev->mc.visible_vram_size) 762 return 0; 763 764 /* Can't move a pinned BO to visible VRAM */ 765 if (rbo->tbo.pin_count > 0) 766 return VM_FAULT_SIGBUS; 767 768 /* hurrah the memory is not visible ! */ 769 radeon_ttm_placement_from_domain(rbo, RADEON_GEM_DOMAIN_VRAM); 770 lpfn = rdev->mc.visible_vram_size >> PAGE_SHIFT; 771 for (i = 0; i < rbo->placement.num_placement; i++) { 772 /* Force into visible VRAM */ 773 if ((rbo->placements[i].mem_type == TTM_PL_VRAM) && 774 (!rbo->placements[i].lpfn || rbo->placements[i].lpfn > lpfn)) 775 rbo->placements[i].lpfn = lpfn; 776 } 777 r = ttm_bo_validate(bo, &rbo->placement, &ctx); 778 if (unlikely(r == -ENOMEM)) { 779 radeon_ttm_placement_from_domain(rbo, RADEON_GEM_DOMAIN_GTT); 780 r = ttm_bo_validate(bo, &rbo->placement, &ctx); 781 } else if (likely(!r)) { 782 offset = bo->resource->start << PAGE_SHIFT; 783 /* this should never happen */ 784 if ((offset + size) > rdev->mc.visible_vram_size) 785 return VM_FAULT_SIGBUS; 786 } 787 788 if (unlikely(r == -EBUSY || r == -ERESTARTSYS)) 789 return VM_FAULT_NOPAGE; 790 else if (unlikely(r)) 791 return VM_FAULT_SIGBUS; 792 793 ttm_bo_move_to_lru_tail_unlocked(bo); 794 return 0; 795 } 796 797 /** 798 * radeon_bo_fence - add fence to buffer object 799 * 800 * @bo: buffer object in question 801 * @fence: fence to add 802 * @shared: true if fence should be added shared 803 * 804 */ 805 void radeon_bo_fence(struct radeon_bo *bo, struct radeon_fence *fence, 806 bool shared) 807 { 808 struct dma_resv *resv = bo->tbo.base.resv; 809 int r; 810 811 r = dma_resv_reserve_fences(resv, 1); 812 if (r) { 813 /* As last resort on OOM we block for the fence */ 814 dma_fence_wait(&fence->base, false); 815 return; 816 } 817 818 dma_resv_add_fence(resv, &fence->base, shared ? 819 DMA_RESV_USAGE_READ : DMA_RESV_USAGE_WRITE); 820 } 821