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 #include <linux/list.h> 33 #include <linux/slab.h> 34 #include <drm/drmP.h> 35 #include <drm/radeon_drm.h> 36 #include <drm/drm_cache.h> 37 #include "radeon.h" 38 #include "radeon_trace.h" 39 40 41 int radeon_ttm_init(struct radeon_device *rdev); 42 void radeon_ttm_fini(struct radeon_device *rdev); 43 static void radeon_bo_clear_surface_reg(struct radeon_bo *bo); 44 45 /* 46 * To exclude mutual BO access we rely on bo_reserve exclusion, as all 47 * function are calling it. 48 */ 49 50 static void radeon_update_memory_usage(struct radeon_bo *bo, 51 unsigned mem_type, int sign) 52 { 53 struct radeon_device *rdev = bo->rdev; 54 u64 size = (u64)bo->tbo.num_pages << PAGE_SHIFT; 55 56 switch (mem_type) { 57 case TTM_PL_TT: 58 if (sign > 0) 59 atomic64_add(size, &rdev->gtt_usage); 60 else 61 atomic64_sub(size, &rdev->gtt_usage); 62 break; 63 case TTM_PL_VRAM: 64 if (sign > 0) 65 atomic64_add(size, &rdev->vram_usage); 66 else 67 atomic64_sub(size, &rdev->vram_usage); 68 break; 69 } 70 } 71 72 static void radeon_ttm_bo_destroy(struct ttm_buffer_object *tbo) 73 { 74 struct radeon_bo *bo; 75 76 bo = container_of(tbo, struct radeon_bo, tbo); 77 78 radeon_update_memory_usage(bo, bo->tbo.mem.mem_type, -1); 79 80 mutex_lock(&bo->rdev->gem.mutex); 81 list_del_init(&bo->list); 82 mutex_unlock(&bo->rdev->gem.mutex); 83 radeon_bo_clear_surface_reg(bo); 84 WARN_ON_ONCE(!list_empty(&bo->va)); 85 if (bo->gem_base.import_attach) 86 drm_prime_gem_destroy(&bo->gem_base, bo->tbo.sg); 87 drm_gem_object_release(&bo->gem_base); 88 kfree(bo); 89 } 90 91 bool radeon_ttm_bo_is_radeon_bo(struct ttm_buffer_object *bo) 92 { 93 if (bo->destroy == &radeon_ttm_bo_destroy) 94 return true; 95 return false; 96 } 97 98 void radeon_ttm_placement_from_domain(struct radeon_bo *rbo, u32 domain) 99 { 100 u32 c = 0, i; 101 102 rbo->placement.placement = rbo->placements; 103 rbo->placement.busy_placement = rbo->placements; 104 if (domain & RADEON_GEM_DOMAIN_VRAM) { 105 /* Try placing BOs which don't need CPU access outside of the 106 * CPU accessible part of VRAM 107 */ 108 if ((rbo->flags & RADEON_GEM_NO_CPU_ACCESS) && 109 rbo->rdev->mc.visible_vram_size < rbo->rdev->mc.real_vram_size) { 110 rbo->placements[c].fpfn = 111 rbo->rdev->mc.visible_vram_size >> PAGE_SHIFT; 112 rbo->placements[c++].flags = TTM_PL_FLAG_WC | 113 TTM_PL_FLAG_UNCACHED | 114 TTM_PL_FLAG_VRAM; 115 } 116 117 rbo->placements[c].fpfn = 0; 118 rbo->placements[c++].flags = TTM_PL_FLAG_WC | 119 TTM_PL_FLAG_UNCACHED | 120 TTM_PL_FLAG_VRAM; 121 } 122 123 if (domain & RADEON_GEM_DOMAIN_GTT) { 124 if (rbo->flags & RADEON_GEM_GTT_UC) { 125 rbo->placements[c].fpfn = 0; 126 rbo->placements[c++].flags = TTM_PL_FLAG_UNCACHED | 127 TTM_PL_FLAG_TT; 128 129 } else if ((rbo->flags & RADEON_GEM_GTT_WC) || 130 (rbo->rdev->flags & RADEON_IS_AGP)) { 131 rbo->placements[c].fpfn = 0; 132 rbo->placements[c++].flags = TTM_PL_FLAG_WC | 133 TTM_PL_FLAG_UNCACHED | 134 TTM_PL_FLAG_TT; 135 } else { 136 rbo->placements[c].fpfn = 0; 137 rbo->placements[c++].flags = TTM_PL_FLAG_CACHED | 138 TTM_PL_FLAG_TT; 139 } 140 } 141 142 if (domain & RADEON_GEM_DOMAIN_CPU) { 143 if (rbo->flags & RADEON_GEM_GTT_UC) { 144 rbo->placements[c].fpfn = 0; 145 rbo->placements[c++].flags = TTM_PL_FLAG_UNCACHED | 146 TTM_PL_FLAG_SYSTEM; 147 148 } else if ((rbo->flags & RADEON_GEM_GTT_WC) || 149 rbo->rdev->flags & RADEON_IS_AGP) { 150 rbo->placements[c].fpfn = 0; 151 rbo->placements[c++].flags = TTM_PL_FLAG_WC | 152 TTM_PL_FLAG_UNCACHED | 153 TTM_PL_FLAG_SYSTEM; 154 } else { 155 rbo->placements[c].fpfn = 0; 156 rbo->placements[c++].flags = TTM_PL_FLAG_CACHED | 157 TTM_PL_FLAG_SYSTEM; 158 } 159 } 160 if (!c) { 161 rbo->placements[c].fpfn = 0; 162 rbo->placements[c++].flags = TTM_PL_MASK_CACHING | 163 TTM_PL_FLAG_SYSTEM; 164 } 165 166 rbo->placement.num_placement = c; 167 rbo->placement.num_busy_placement = c; 168 169 for (i = 0; i < c; ++i) { 170 if ((rbo->flags & RADEON_GEM_CPU_ACCESS) && 171 (rbo->placements[i].flags & TTM_PL_FLAG_VRAM) && 172 !rbo->placements[i].fpfn) 173 rbo->placements[i].lpfn = 174 rbo->rdev->mc.visible_vram_size >> PAGE_SHIFT; 175 else 176 rbo->placements[i].lpfn = 0; 177 } 178 } 179 180 int radeon_bo_create(struct radeon_device *rdev, 181 unsigned long size, int byte_align, bool kernel, 182 u32 domain, u32 flags, struct sg_table *sg, 183 struct reservation_object *resv, 184 struct radeon_bo **bo_ptr) 185 { 186 struct radeon_bo *bo; 187 enum ttm_bo_type type; 188 unsigned long page_align = roundup(byte_align, PAGE_SIZE) >> PAGE_SHIFT; 189 size_t acc_size; 190 int r; 191 192 size = ALIGN(size, PAGE_SIZE); 193 194 if (kernel) { 195 type = ttm_bo_type_kernel; 196 } else if (sg) { 197 type = ttm_bo_type_sg; 198 } else { 199 type = ttm_bo_type_device; 200 } 201 *bo_ptr = NULL; 202 203 acc_size = ttm_bo_dma_acc_size(&rdev->mman.bdev, size, 204 sizeof(struct radeon_bo)); 205 206 bo = kzalloc(sizeof(struct radeon_bo), GFP_KERNEL); 207 if (bo == NULL) 208 return -ENOMEM; 209 drm_gem_private_object_init(rdev->ddev, &bo->gem_base, size); 210 bo->rdev = rdev; 211 bo->surface_reg = -1; 212 INIT_LIST_HEAD(&bo->list); 213 INIT_LIST_HEAD(&bo->va); 214 bo->initial_domain = domain & (RADEON_GEM_DOMAIN_VRAM | 215 RADEON_GEM_DOMAIN_GTT | 216 RADEON_GEM_DOMAIN_CPU); 217 218 bo->flags = flags; 219 /* PCI GART is always snooped */ 220 if (!(rdev->flags & RADEON_IS_PCIE)) 221 bo->flags &= ~(RADEON_GEM_GTT_WC | RADEON_GEM_GTT_UC); 222 223 /* Write-combined CPU mappings of GTT cause GPU hangs with RV6xx 224 * See https://bugs.freedesktop.org/show_bug.cgi?id=91268 225 */ 226 if (rdev->family >= CHIP_RV610 && rdev->family <= CHIP_RV635) 227 bo->flags &= ~(RADEON_GEM_GTT_WC | RADEON_GEM_GTT_UC); 228 229 #ifdef CONFIG_X86_32 230 /* XXX: Write-combined CPU mappings of GTT seem broken on 32-bit 231 * See https://bugs.freedesktop.org/show_bug.cgi?id=84627 232 */ 233 bo->flags &= ~(RADEON_GEM_GTT_WC | RADEON_GEM_GTT_UC); 234 #elif defined(CONFIG_X86) && !defined(CONFIG_X86_PAT) 235 /* Don't try to enable write-combining when it can't work, or things 236 * may be slow 237 * See https://bugs.freedesktop.org/show_bug.cgi?id=88758 238 */ 239 #ifndef CONFIG_COMPILE_TEST 240 #warning Please enable CONFIG_MTRR and CONFIG_X86_PAT for better performance \ 241 thanks to write-combining 242 #endif 243 244 if (bo->flags & RADEON_GEM_GTT_WC) 245 DRM_INFO_ONCE("Please enable CONFIG_MTRR and CONFIG_X86_PAT for " 246 "better performance thanks to write-combining\n"); 247 bo->flags &= ~(RADEON_GEM_GTT_WC | RADEON_GEM_GTT_UC); 248 #else 249 /* For architectures that don't support WC memory, 250 * mask out the WC flag from the BO 251 */ 252 if (!drm_arch_can_wc_memory()) 253 bo->flags &= ~RADEON_GEM_GTT_WC; 254 #endif 255 256 radeon_ttm_placement_from_domain(bo, domain); 257 /* Kernel allocation are uninterruptible */ 258 down_read(&rdev->pm.mclk_lock); 259 r = ttm_bo_init(&rdev->mman.bdev, &bo->tbo, size, type, 260 &bo->placement, page_align, !kernel, acc_size, 261 sg, resv, &radeon_ttm_bo_destroy); 262 up_read(&rdev->pm.mclk_lock); 263 if (unlikely(r != 0)) { 264 return r; 265 } 266 *bo_ptr = bo; 267 268 trace_radeon_bo_create(bo); 269 270 return 0; 271 } 272 273 int radeon_bo_kmap(struct radeon_bo *bo, void **ptr) 274 { 275 bool is_iomem; 276 int r; 277 278 if (bo->kptr) { 279 if (ptr) { 280 *ptr = bo->kptr; 281 } 282 return 0; 283 } 284 r = ttm_bo_kmap(&bo->tbo, 0, bo->tbo.num_pages, &bo->kmap); 285 if (r) { 286 return r; 287 } 288 bo->kptr = ttm_kmap_obj_virtual(&bo->kmap, &is_iomem); 289 if (ptr) { 290 *ptr = bo->kptr; 291 } 292 radeon_bo_check_tiling(bo, 0, 0); 293 return 0; 294 } 295 296 void radeon_bo_kunmap(struct radeon_bo *bo) 297 { 298 if (bo->kptr == NULL) 299 return; 300 bo->kptr = NULL; 301 radeon_bo_check_tiling(bo, 0, 0); 302 ttm_bo_kunmap(&bo->kmap); 303 } 304 305 struct radeon_bo *radeon_bo_ref(struct radeon_bo *bo) 306 { 307 if (bo == NULL) 308 return NULL; 309 310 ttm_bo_get(&bo->tbo); 311 return bo; 312 } 313 314 void radeon_bo_unref(struct radeon_bo **bo) 315 { 316 struct ttm_buffer_object *tbo; 317 318 if ((*bo) == NULL) 319 return; 320 tbo = &((*bo)->tbo); 321 ttm_bo_put(tbo); 322 *bo = NULL; 323 } 324 325 int radeon_bo_pin_restricted(struct radeon_bo *bo, u32 domain, u64 max_offset, 326 u64 *gpu_addr) 327 { 328 struct ttm_operation_ctx ctx = { false, false }; 329 int r, i; 330 331 if (radeon_ttm_tt_has_userptr(bo->tbo.ttm)) 332 return -EPERM; 333 334 if (bo->pin_count) { 335 bo->pin_count++; 336 if (gpu_addr) 337 *gpu_addr = radeon_bo_gpu_offset(bo); 338 339 if (max_offset != 0) { 340 u64 domain_start; 341 342 if (domain == RADEON_GEM_DOMAIN_VRAM) 343 domain_start = bo->rdev->mc.vram_start; 344 else 345 domain_start = bo->rdev->mc.gtt_start; 346 WARN_ON_ONCE(max_offset < 347 (radeon_bo_gpu_offset(bo) - domain_start)); 348 } 349 350 return 0; 351 } 352 if (bo->prime_shared_count && domain == RADEON_GEM_DOMAIN_VRAM) { 353 /* A BO shared as a dma-buf cannot be sensibly migrated to VRAM */ 354 return -EINVAL; 355 } 356 357 radeon_ttm_placement_from_domain(bo, domain); 358 for (i = 0; i < bo->placement.num_placement; i++) { 359 /* force to pin into visible video ram */ 360 if ((bo->placements[i].flags & TTM_PL_FLAG_VRAM) && 361 !(bo->flags & RADEON_GEM_NO_CPU_ACCESS) && 362 (!max_offset || max_offset > bo->rdev->mc.visible_vram_size)) 363 bo->placements[i].lpfn = 364 bo->rdev->mc.visible_vram_size >> PAGE_SHIFT; 365 else 366 bo->placements[i].lpfn = max_offset >> PAGE_SHIFT; 367 368 bo->placements[i].flags |= TTM_PL_FLAG_NO_EVICT; 369 } 370 371 r = ttm_bo_validate(&bo->tbo, &bo->placement, &ctx); 372 if (likely(r == 0)) { 373 bo->pin_count = 1; 374 if (gpu_addr != NULL) 375 *gpu_addr = radeon_bo_gpu_offset(bo); 376 if (domain == RADEON_GEM_DOMAIN_VRAM) 377 bo->rdev->vram_pin_size += radeon_bo_size(bo); 378 else 379 bo->rdev->gart_pin_size += radeon_bo_size(bo); 380 } else { 381 dev_err(bo->rdev->dev, "%p pin failed\n", bo); 382 } 383 return r; 384 } 385 386 int radeon_bo_pin(struct radeon_bo *bo, u32 domain, u64 *gpu_addr) 387 { 388 return radeon_bo_pin_restricted(bo, domain, 0, gpu_addr); 389 } 390 391 int radeon_bo_unpin(struct radeon_bo *bo) 392 { 393 struct ttm_operation_ctx ctx = { false, false }; 394 int r, i; 395 396 if (!bo->pin_count) { 397 dev_warn(bo->rdev->dev, "%p unpin not necessary\n", bo); 398 return 0; 399 } 400 bo->pin_count--; 401 if (bo->pin_count) 402 return 0; 403 for (i = 0; i < bo->placement.num_placement; i++) { 404 bo->placements[i].lpfn = 0; 405 bo->placements[i].flags &= ~TTM_PL_FLAG_NO_EVICT; 406 } 407 r = ttm_bo_validate(&bo->tbo, &bo->placement, &ctx); 408 if (likely(r == 0)) { 409 if (bo->tbo.mem.mem_type == TTM_PL_VRAM) 410 bo->rdev->vram_pin_size -= radeon_bo_size(bo); 411 else 412 bo->rdev->gart_pin_size -= radeon_bo_size(bo); 413 } else { 414 dev_err(bo->rdev->dev, "%p validate failed for unpin\n", bo); 415 } 416 return r; 417 } 418 419 int radeon_bo_evict_vram(struct radeon_device *rdev) 420 { 421 /* late 2.6.33 fix IGP hibernate - we need pm ops to do this correct */ 422 #ifndef CONFIG_HIBERNATION 423 if (rdev->flags & RADEON_IS_IGP) { 424 if (rdev->mc.igp_sideport_enabled == false) 425 /* Useless to evict on IGP chips */ 426 return 0; 427 } 428 #endif 429 return ttm_bo_evict_mm(&rdev->mman.bdev, TTM_PL_VRAM); 430 } 431 432 void radeon_bo_force_delete(struct radeon_device *rdev) 433 { 434 struct radeon_bo *bo, *n; 435 436 if (list_empty(&rdev->gem.objects)) { 437 return; 438 } 439 dev_err(rdev->dev, "Userspace still has active objects !\n"); 440 list_for_each_entry_safe(bo, n, &rdev->gem.objects, list) { 441 dev_err(rdev->dev, "%p %p %lu %lu force free\n", 442 &bo->gem_base, bo, (unsigned long)bo->gem_base.size, 443 *((unsigned long *)&bo->gem_base.refcount)); 444 mutex_lock(&bo->rdev->gem.mutex); 445 list_del_init(&bo->list); 446 mutex_unlock(&bo->rdev->gem.mutex); 447 /* this should unref the ttm bo */ 448 drm_gem_object_put_unlocked(&bo->gem_base); 449 } 450 } 451 452 int radeon_bo_init(struct radeon_device *rdev) 453 { 454 /* reserve PAT memory space to WC for VRAM */ 455 arch_io_reserve_memtype_wc(rdev->mc.aper_base, 456 rdev->mc.aper_size); 457 458 /* Add an MTRR for the VRAM */ 459 if (!rdev->fastfb_working) { 460 rdev->mc.vram_mtrr = arch_phys_wc_add(rdev->mc.aper_base, 461 rdev->mc.aper_size); 462 } 463 DRM_INFO("Detected VRAM RAM=%lluM, BAR=%lluM\n", 464 rdev->mc.mc_vram_size >> 20, 465 (unsigned long long)rdev->mc.aper_size >> 20); 466 DRM_INFO("RAM width %dbits %cDR\n", 467 rdev->mc.vram_width, rdev->mc.vram_is_ddr ? 'D' : 'S'); 468 return radeon_ttm_init(rdev); 469 } 470 471 void radeon_bo_fini(struct radeon_device *rdev) 472 { 473 radeon_ttm_fini(rdev); 474 arch_phys_wc_del(rdev->mc.vram_mtrr); 475 arch_io_free_memtype_wc(rdev->mc.aper_base, rdev->mc.aper_size); 476 } 477 478 /* Returns how many bytes TTM can move per IB. 479 */ 480 static u64 radeon_bo_get_threshold_for_moves(struct radeon_device *rdev) 481 { 482 u64 real_vram_size = rdev->mc.real_vram_size; 483 u64 vram_usage = atomic64_read(&rdev->vram_usage); 484 485 /* This function is based on the current VRAM usage. 486 * 487 * - If all of VRAM is free, allow relocating the number of bytes that 488 * is equal to 1/4 of the size of VRAM for this IB. 489 490 * - If more than one half of VRAM is occupied, only allow relocating 491 * 1 MB of data for this IB. 492 * 493 * - From 0 to one half of used VRAM, the threshold decreases 494 * linearly. 495 * __________________ 496 * 1/4 of -|\ | 497 * VRAM | \ | 498 * | \ | 499 * | \ | 500 * | \ | 501 * | \ | 502 * | \ | 503 * | \________|1 MB 504 * |----------------| 505 * VRAM 0 % 100 % 506 * used used 507 * 508 * Note: It's a threshold, not a limit. The threshold must be crossed 509 * for buffer relocations to stop, so any buffer of an arbitrary size 510 * can be moved as long as the threshold isn't crossed before 511 * the relocation takes place. We don't want to disable buffer 512 * relocations completely. 513 * 514 * The idea is that buffers should be placed in VRAM at creation time 515 * and TTM should only do a minimum number of relocations during 516 * command submission. In practice, you need to submit at least 517 * a dozen IBs to move all buffers to VRAM if they are in GTT. 518 * 519 * Also, things can get pretty crazy under memory pressure and actual 520 * VRAM usage can change a lot, so playing safe even at 50% does 521 * consistently increase performance. 522 */ 523 524 u64 half_vram = real_vram_size >> 1; 525 u64 half_free_vram = vram_usage >= half_vram ? 0 : half_vram - vram_usage; 526 u64 bytes_moved_threshold = half_free_vram >> 1; 527 return max(bytes_moved_threshold, 1024*1024ull); 528 } 529 530 int radeon_bo_list_validate(struct radeon_device *rdev, 531 struct ww_acquire_ctx *ticket, 532 struct list_head *head, int ring) 533 { 534 struct ttm_operation_ctx ctx = { true, false }; 535 struct radeon_bo_list *lobj; 536 struct list_head duplicates; 537 int r; 538 u64 bytes_moved = 0, initial_bytes_moved; 539 u64 bytes_moved_threshold = radeon_bo_get_threshold_for_moves(rdev); 540 541 INIT_LIST_HEAD(&duplicates); 542 r = ttm_eu_reserve_buffers(ticket, head, true, &duplicates); 543 if (unlikely(r != 0)) { 544 return r; 545 } 546 547 list_for_each_entry(lobj, head, tv.head) { 548 struct radeon_bo *bo = lobj->robj; 549 if (!bo->pin_count) { 550 u32 domain = lobj->preferred_domains; 551 u32 allowed = lobj->allowed_domains; 552 u32 current_domain = 553 radeon_mem_type_to_domain(bo->tbo.mem.mem_type); 554 555 /* Check if this buffer will be moved and don't move it 556 * if we have moved too many buffers for this IB already. 557 * 558 * Note that this allows moving at least one buffer of 559 * any size, because it doesn't take the current "bo" 560 * into account. We don't want to disallow buffer moves 561 * completely. 562 */ 563 if ((allowed & current_domain) != 0 && 564 (domain & current_domain) == 0 && /* will be moved */ 565 bytes_moved > bytes_moved_threshold) { 566 /* don't move it */ 567 domain = current_domain; 568 } 569 570 retry: 571 radeon_ttm_placement_from_domain(bo, domain); 572 if (ring == R600_RING_TYPE_UVD_INDEX) 573 radeon_uvd_force_into_uvd_segment(bo, allowed); 574 575 initial_bytes_moved = atomic64_read(&rdev->num_bytes_moved); 576 r = ttm_bo_validate(&bo->tbo, &bo->placement, &ctx); 577 bytes_moved += atomic64_read(&rdev->num_bytes_moved) - 578 initial_bytes_moved; 579 580 if (unlikely(r)) { 581 if (r != -ERESTARTSYS && 582 domain != lobj->allowed_domains) { 583 domain = lobj->allowed_domains; 584 goto retry; 585 } 586 ttm_eu_backoff_reservation(ticket, head); 587 return r; 588 } 589 } 590 lobj->gpu_offset = radeon_bo_gpu_offset(bo); 591 lobj->tiling_flags = bo->tiling_flags; 592 } 593 594 list_for_each_entry(lobj, &duplicates, tv.head) { 595 lobj->gpu_offset = radeon_bo_gpu_offset(lobj->robj); 596 lobj->tiling_flags = lobj->robj->tiling_flags; 597 } 598 599 return 0; 600 } 601 602 int radeon_bo_get_surface_reg(struct radeon_bo *bo) 603 { 604 struct radeon_device *rdev = bo->rdev; 605 struct radeon_surface_reg *reg; 606 struct radeon_bo *old_object; 607 int steal; 608 int i; 609 610 lockdep_assert_held(&bo->tbo.resv->lock.base); 611 612 if (!bo->tiling_flags) 613 return 0; 614 615 if (bo->surface_reg >= 0) { 616 reg = &rdev->surface_regs[bo->surface_reg]; 617 i = bo->surface_reg; 618 goto out; 619 } 620 621 steal = -1; 622 for (i = 0; i < RADEON_GEM_MAX_SURFACES; i++) { 623 624 reg = &rdev->surface_regs[i]; 625 if (!reg->bo) 626 break; 627 628 old_object = reg->bo; 629 if (old_object->pin_count == 0) 630 steal = i; 631 } 632 633 /* if we are all out */ 634 if (i == RADEON_GEM_MAX_SURFACES) { 635 if (steal == -1) 636 return -ENOMEM; 637 /* find someone with a surface reg and nuke their BO */ 638 reg = &rdev->surface_regs[steal]; 639 old_object = reg->bo; 640 /* blow away the mapping */ 641 DRM_DEBUG("stealing surface reg %d from %p\n", steal, old_object); 642 ttm_bo_unmap_virtual(&old_object->tbo); 643 old_object->surface_reg = -1; 644 i = steal; 645 } 646 647 bo->surface_reg = i; 648 reg->bo = bo; 649 650 out: 651 radeon_set_surface_reg(rdev, i, bo->tiling_flags, bo->pitch, 652 bo->tbo.mem.start << PAGE_SHIFT, 653 bo->tbo.num_pages << PAGE_SHIFT); 654 return 0; 655 } 656 657 static void radeon_bo_clear_surface_reg(struct radeon_bo *bo) 658 { 659 struct radeon_device *rdev = bo->rdev; 660 struct radeon_surface_reg *reg; 661 662 if (bo->surface_reg == -1) 663 return; 664 665 reg = &rdev->surface_regs[bo->surface_reg]; 666 radeon_clear_surface_reg(rdev, bo->surface_reg); 667 668 reg->bo = NULL; 669 bo->surface_reg = -1; 670 } 671 672 int radeon_bo_set_tiling_flags(struct radeon_bo *bo, 673 uint32_t tiling_flags, uint32_t pitch) 674 { 675 struct radeon_device *rdev = bo->rdev; 676 int r; 677 678 if (rdev->family >= CHIP_CEDAR) { 679 unsigned bankw, bankh, mtaspect, tilesplit, stilesplit; 680 681 bankw = (tiling_flags >> RADEON_TILING_EG_BANKW_SHIFT) & RADEON_TILING_EG_BANKW_MASK; 682 bankh = (tiling_flags >> RADEON_TILING_EG_BANKH_SHIFT) & RADEON_TILING_EG_BANKH_MASK; 683 mtaspect = (tiling_flags >> RADEON_TILING_EG_MACRO_TILE_ASPECT_SHIFT) & RADEON_TILING_EG_MACRO_TILE_ASPECT_MASK; 684 tilesplit = (tiling_flags >> RADEON_TILING_EG_TILE_SPLIT_SHIFT) & RADEON_TILING_EG_TILE_SPLIT_MASK; 685 stilesplit = (tiling_flags >> RADEON_TILING_EG_STENCIL_TILE_SPLIT_SHIFT) & RADEON_TILING_EG_STENCIL_TILE_SPLIT_MASK; 686 switch (bankw) { 687 case 0: 688 case 1: 689 case 2: 690 case 4: 691 case 8: 692 break; 693 default: 694 return -EINVAL; 695 } 696 switch (bankh) { 697 case 0: 698 case 1: 699 case 2: 700 case 4: 701 case 8: 702 break; 703 default: 704 return -EINVAL; 705 } 706 switch (mtaspect) { 707 case 0: 708 case 1: 709 case 2: 710 case 4: 711 case 8: 712 break; 713 default: 714 return -EINVAL; 715 } 716 if (tilesplit > 6) { 717 return -EINVAL; 718 } 719 if (stilesplit > 6) { 720 return -EINVAL; 721 } 722 } 723 r = radeon_bo_reserve(bo, false); 724 if (unlikely(r != 0)) 725 return r; 726 bo->tiling_flags = tiling_flags; 727 bo->pitch = pitch; 728 radeon_bo_unreserve(bo); 729 return 0; 730 } 731 732 void radeon_bo_get_tiling_flags(struct radeon_bo *bo, 733 uint32_t *tiling_flags, 734 uint32_t *pitch) 735 { 736 lockdep_assert_held(&bo->tbo.resv->lock.base); 737 738 if (tiling_flags) 739 *tiling_flags = bo->tiling_flags; 740 if (pitch) 741 *pitch = bo->pitch; 742 } 743 744 int radeon_bo_check_tiling(struct radeon_bo *bo, bool has_moved, 745 bool force_drop) 746 { 747 if (!force_drop) 748 lockdep_assert_held(&bo->tbo.resv->lock.base); 749 750 if (!(bo->tiling_flags & RADEON_TILING_SURFACE)) 751 return 0; 752 753 if (force_drop) { 754 radeon_bo_clear_surface_reg(bo); 755 return 0; 756 } 757 758 if (bo->tbo.mem.mem_type != TTM_PL_VRAM) { 759 if (!has_moved) 760 return 0; 761 762 if (bo->surface_reg >= 0) 763 radeon_bo_clear_surface_reg(bo); 764 return 0; 765 } 766 767 if ((bo->surface_reg >= 0) && !has_moved) 768 return 0; 769 770 return radeon_bo_get_surface_reg(bo); 771 } 772 773 void radeon_bo_move_notify(struct ttm_buffer_object *bo, 774 bool evict, 775 struct ttm_mem_reg *new_mem) 776 { 777 struct radeon_bo *rbo; 778 779 if (!radeon_ttm_bo_is_radeon_bo(bo)) 780 return; 781 782 rbo = container_of(bo, struct radeon_bo, tbo); 783 radeon_bo_check_tiling(rbo, 0, 1); 784 radeon_vm_bo_invalidate(rbo->rdev, rbo); 785 786 /* update statistics */ 787 if (!new_mem) 788 return; 789 790 radeon_update_memory_usage(rbo, bo->mem.mem_type, -1); 791 radeon_update_memory_usage(rbo, new_mem->mem_type, 1); 792 } 793 794 int radeon_bo_fault_reserve_notify(struct ttm_buffer_object *bo) 795 { 796 struct ttm_operation_ctx ctx = { false, false }; 797 struct radeon_device *rdev; 798 struct radeon_bo *rbo; 799 unsigned long offset, size, lpfn; 800 int i, r; 801 802 if (!radeon_ttm_bo_is_radeon_bo(bo)) 803 return 0; 804 rbo = container_of(bo, struct radeon_bo, tbo); 805 radeon_bo_check_tiling(rbo, 0, 0); 806 rdev = rbo->rdev; 807 if (bo->mem.mem_type != TTM_PL_VRAM) 808 return 0; 809 810 size = bo->mem.num_pages << PAGE_SHIFT; 811 offset = bo->mem.start << PAGE_SHIFT; 812 if ((offset + size) <= rdev->mc.visible_vram_size) 813 return 0; 814 815 /* Can't move a pinned BO to visible VRAM */ 816 if (rbo->pin_count > 0) 817 return -EINVAL; 818 819 /* hurrah the memory is not visible ! */ 820 radeon_ttm_placement_from_domain(rbo, RADEON_GEM_DOMAIN_VRAM); 821 lpfn = rdev->mc.visible_vram_size >> PAGE_SHIFT; 822 for (i = 0; i < rbo->placement.num_placement; i++) { 823 /* Force into visible VRAM */ 824 if ((rbo->placements[i].flags & TTM_PL_FLAG_VRAM) && 825 (!rbo->placements[i].lpfn || rbo->placements[i].lpfn > lpfn)) 826 rbo->placements[i].lpfn = lpfn; 827 } 828 r = ttm_bo_validate(bo, &rbo->placement, &ctx); 829 if (unlikely(r == -ENOMEM)) { 830 radeon_ttm_placement_from_domain(rbo, RADEON_GEM_DOMAIN_GTT); 831 return ttm_bo_validate(bo, &rbo->placement, &ctx); 832 } else if (unlikely(r != 0)) { 833 return r; 834 } 835 836 offset = bo->mem.start << PAGE_SHIFT; 837 /* this should never happen */ 838 if ((offset + size) > rdev->mc.visible_vram_size) 839 return -EINVAL; 840 841 return 0; 842 } 843 844 int radeon_bo_wait(struct radeon_bo *bo, u32 *mem_type, bool no_wait) 845 { 846 int r; 847 848 r = ttm_bo_reserve(&bo->tbo, true, no_wait, NULL); 849 if (unlikely(r != 0)) 850 return r; 851 if (mem_type) 852 *mem_type = bo->tbo.mem.mem_type; 853 854 r = ttm_bo_wait(&bo->tbo, true, no_wait); 855 ttm_bo_unreserve(&bo->tbo); 856 return r; 857 } 858 859 /** 860 * radeon_bo_fence - add fence to buffer object 861 * 862 * @bo: buffer object in question 863 * @fence: fence to add 864 * @shared: true if fence should be added shared 865 * 866 */ 867 void radeon_bo_fence(struct radeon_bo *bo, struct radeon_fence *fence, 868 bool shared) 869 { 870 struct reservation_object *resv = bo->tbo.resv; 871 872 if (shared) 873 reservation_object_add_shared_fence(resv, &fence->base); 874 else 875 reservation_object_add_excl_fence(resv, &fence->base); 876 } 877