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