2 * Copyright 2009 Jerome Glisse.
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:
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.
21 * The above copyright notice and this permission notice (including the
22 * next paragraph) shall be included in all copies or substantial portions
29 * Thomas Hellstrom <thomas-at-tungstengraphics-dot-com>
32 #include <linux/list.h>
33 #include <linux/slab.h>
35 #include <drm/amdgpu_drm.h>
36 #include <drm/drm_cache.h>
38 #include "amdgpu_trace.h"
39 #include "amdgpu_amdkfd.h"
44 * This defines the interfaces to operate on an &amdgpu_bo buffer object which
45 * represents memory used by driver (VRAM, system memory, etc.). The driver
46 * provides DRM/GEM APIs to userspace. DRM/GEM APIs then use these interfaces
47 * to create/destroy/set buffer object which are then managed by the kernel TTM
49 * The interfaces are also used internally by kernel clients, including gfx,
50 * uvd, etc. for kernel managed allocations used by the GPU.
55 * amdgpu_bo_subtract_pin_size - Remove BO from pin_size accounting
57 * @bo: &amdgpu_bo buffer object
59 * This function is called when a BO stops being pinned, and updates the
60 * &amdgpu_device pin_size values accordingly.
62 static void amdgpu_bo_subtract_pin_size(struct amdgpu_bo *bo)
64 struct amdgpu_device *adev = amdgpu_ttm_adev(bo->tbo.bdev);
66 if (bo->tbo.mem.mem_type == TTM_PL_VRAM) {
67 atomic64_sub(amdgpu_bo_size(bo), &adev->vram_pin_size);
68 atomic64_sub(amdgpu_vram_mgr_bo_visible_size(bo),
69 &adev->visible_pin_size);
70 } else if (bo->tbo.mem.mem_type == TTM_PL_TT) {
71 atomic64_sub(amdgpu_bo_size(bo), &adev->gart_pin_size);
75 static void amdgpu_bo_destroy(struct ttm_buffer_object *tbo)
77 struct amdgpu_device *adev = amdgpu_ttm_adev(tbo->bdev);
78 struct amdgpu_bo *bo = ttm_to_amdgpu_bo(tbo);
80 if (bo->pin_count > 0)
81 amdgpu_bo_subtract_pin_size(bo);
85 if (bo->tbo.base.import_attach)
86 drm_prime_gem_destroy(&bo->tbo.base, bo->tbo.sg);
87 drm_gem_object_release(&bo->tbo.base);
88 /* in case amdgpu_device_recover_vram got NULL of bo->parent */
89 if (!list_empty(&bo->shadow_list)) {
90 mutex_lock(&adev->shadow_list_lock);
91 list_del_init(&bo->shadow_list);
92 mutex_unlock(&adev->shadow_list_lock);
94 amdgpu_bo_unref(&bo->parent);
101 * amdgpu_bo_is_amdgpu_bo - check if the buffer object is an &amdgpu_bo
102 * @bo: buffer object to be checked
104 * Uses destroy function associated with the object to determine if this is
108 * true if the object belongs to &amdgpu_bo, false if not.
110 bool amdgpu_bo_is_amdgpu_bo(struct ttm_buffer_object *bo)
112 if (bo->destroy == &amdgpu_bo_destroy)
118 * amdgpu_bo_placement_from_domain - set buffer's placement
119 * @abo: &amdgpu_bo buffer object whose placement is to be set
120 * @domain: requested domain
122 * Sets buffer's placement according to requested domain and the buffer's
125 void amdgpu_bo_placement_from_domain(struct amdgpu_bo *abo, u32 domain)
127 struct amdgpu_device *adev = amdgpu_ttm_adev(abo->tbo.bdev);
128 struct ttm_placement *placement = &abo->placement;
129 struct ttm_place *places = abo->placements;
130 u64 flags = abo->flags;
133 if (domain & AMDGPU_GEM_DOMAIN_VRAM) {
134 unsigned visible_pfn = adev->gmc.visible_vram_size >> PAGE_SHIFT;
138 places[c].flags = TTM_PL_FLAG_WC | TTM_PL_FLAG_UNCACHED |
141 if (flags & AMDGPU_GEM_CREATE_CPU_ACCESS_REQUIRED)
142 places[c].lpfn = visible_pfn;
144 places[c].flags |= TTM_PL_FLAG_TOPDOWN;
146 if (flags & AMDGPU_GEM_CREATE_VRAM_CONTIGUOUS)
147 places[c].flags |= TTM_PL_FLAG_CONTIGUOUS;
151 if (domain & AMDGPU_GEM_DOMAIN_GTT) {
154 places[c].flags = TTM_PL_FLAG_TT;
155 if (flags & AMDGPU_GEM_CREATE_CPU_GTT_USWC)
156 places[c].flags |= TTM_PL_FLAG_WC |
157 TTM_PL_FLAG_UNCACHED;
159 places[c].flags |= TTM_PL_FLAG_CACHED;
163 if (domain & AMDGPU_GEM_DOMAIN_CPU) {
166 places[c].flags = TTM_PL_FLAG_SYSTEM;
167 if (flags & AMDGPU_GEM_CREATE_CPU_GTT_USWC)
168 places[c].flags |= TTM_PL_FLAG_WC |
169 TTM_PL_FLAG_UNCACHED;
171 places[c].flags |= TTM_PL_FLAG_CACHED;
175 if (domain & AMDGPU_GEM_DOMAIN_GDS) {
178 places[c].flags = TTM_PL_FLAG_UNCACHED | AMDGPU_PL_FLAG_GDS;
182 if (domain & AMDGPU_GEM_DOMAIN_GWS) {
185 places[c].flags = TTM_PL_FLAG_UNCACHED | AMDGPU_PL_FLAG_GWS;
189 if (domain & AMDGPU_GEM_DOMAIN_OA) {
192 places[c].flags = TTM_PL_FLAG_UNCACHED | AMDGPU_PL_FLAG_OA;
199 places[c].flags = TTM_PL_MASK_CACHING | TTM_PL_FLAG_SYSTEM;
203 BUG_ON(c >= AMDGPU_BO_MAX_PLACEMENTS);
205 placement->num_placement = c;
206 placement->placement = places;
208 placement->num_busy_placement = c;
209 placement->busy_placement = places;
213 * amdgpu_bo_create_reserved - create reserved BO for kernel use
215 * @adev: amdgpu device object
216 * @size: size for the new BO
217 * @align: alignment for the new BO
218 * @domain: where to place it
219 * @bo_ptr: used to initialize BOs in structures
220 * @gpu_addr: GPU addr of the pinned BO
221 * @cpu_addr: optional CPU address mapping
223 * Allocates and pins a BO for kernel internal use, and returns it still
226 * Note: For bo_ptr new BO is only created if bo_ptr points to NULL.
229 * 0 on success, negative error code otherwise.
231 int amdgpu_bo_create_reserved(struct amdgpu_device *adev,
232 unsigned long size, int align,
233 u32 domain, struct amdgpu_bo **bo_ptr,
234 u64 *gpu_addr, void **cpu_addr)
236 struct amdgpu_bo_param bp;
241 amdgpu_bo_unref(bo_ptr);
245 memset(&bp, 0, sizeof(bp));
247 bp.byte_align = align;
249 bp.flags = cpu_addr ? AMDGPU_GEM_CREATE_CPU_ACCESS_REQUIRED
250 : AMDGPU_GEM_CREATE_NO_CPU_ACCESS;
251 bp.flags |= AMDGPU_GEM_CREATE_VRAM_CONTIGUOUS;
252 bp.type = ttm_bo_type_kernel;
256 r = amdgpu_bo_create(adev, &bp, bo_ptr);
258 dev_err(adev->dev, "(%d) failed to allocate kernel bo\n",
265 r = amdgpu_bo_reserve(*bo_ptr, false);
267 dev_err(adev->dev, "(%d) failed to reserve kernel bo\n", r);
271 r = amdgpu_bo_pin(*bo_ptr, domain);
273 dev_err(adev->dev, "(%d) kernel bo pin failed\n", r);
274 goto error_unreserve;
277 r = amdgpu_ttm_alloc_gart(&(*bo_ptr)->tbo);
279 dev_err(adev->dev, "%p bind failed\n", *bo_ptr);
284 *gpu_addr = amdgpu_bo_gpu_offset(*bo_ptr);
287 r = amdgpu_bo_kmap(*bo_ptr, cpu_addr);
289 dev_err(adev->dev, "(%d) kernel bo map failed\n", r);
297 amdgpu_bo_unpin(*bo_ptr);
299 amdgpu_bo_unreserve(*bo_ptr);
303 amdgpu_bo_unref(bo_ptr);
309 * amdgpu_bo_create_kernel - create BO for kernel use
311 * @adev: amdgpu device object
312 * @size: size for the new BO
313 * @align: alignment for the new BO
314 * @domain: where to place it
315 * @bo_ptr: used to initialize BOs in structures
316 * @gpu_addr: GPU addr of the pinned BO
317 * @cpu_addr: optional CPU address mapping
319 * Allocates and pins a BO for kernel internal use.
321 * Note: For bo_ptr new BO is only created if bo_ptr points to NULL.
324 * 0 on success, negative error code otherwise.
326 int amdgpu_bo_create_kernel(struct amdgpu_device *adev,
327 unsigned long size, int align,
328 u32 domain, struct amdgpu_bo **bo_ptr,
329 u64 *gpu_addr, void **cpu_addr)
333 r = amdgpu_bo_create_reserved(adev, size, align, domain, bo_ptr,
340 amdgpu_bo_unreserve(*bo_ptr);
346 * amdgpu_bo_create_kernel_at - create BO for kernel use at specific location
348 * @adev: amdgpu device object
349 * @offset: offset of the BO
350 * @size: size of the BO
351 * @domain: where to place it
352 * @bo_ptr: used to initialize BOs in structures
353 * @cpu_addr: optional CPU address mapping
355 * Creates a kernel BO at a specific offset in the address space of the domain.
358 * 0 on success, negative error code otherwise.
360 int amdgpu_bo_create_kernel_at(struct amdgpu_device *adev,
361 uint64_t offset, uint64_t size, uint32_t domain,
362 struct amdgpu_bo **bo_ptr, void **cpu_addr)
364 struct ttm_operation_ctx ctx = { false, false };
369 size = ALIGN(size, PAGE_SIZE);
371 r = amdgpu_bo_create_reserved(adev, size, PAGE_SIZE, domain, bo_ptr,
377 * Remove the original mem node and create a new one at the request
381 amdgpu_bo_kunmap(*bo_ptr);
383 ttm_bo_mem_put(&(*bo_ptr)->tbo, &(*bo_ptr)->tbo.mem);
385 for (i = 0; i < (*bo_ptr)->placement.num_placement; ++i) {
386 (*bo_ptr)->placements[i].fpfn = offset >> PAGE_SHIFT;
387 (*bo_ptr)->placements[i].lpfn = (offset + size) >> PAGE_SHIFT;
389 r = ttm_bo_mem_space(&(*bo_ptr)->tbo, &(*bo_ptr)->placement,
390 &(*bo_ptr)->tbo.mem, &ctx);
395 r = amdgpu_bo_kmap(*bo_ptr, cpu_addr);
400 amdgpu_bo_unreserve(*bo_ptr);
404 amdgpu_bo_unreserve(*bo_ptr);
405 amdgpu_bo_unref(bo_ptr);
410 * amdgpu_bo_free_kernel - free BO for kernel use
412 * @bo: amdgpu BO to free
413 * @gpu_addr: pointer to where the BO's GPU memory space address was stored
414 * @cpu_addr: pointer to where the BO's CPU memory space address was stored
416 * unmaps and unpin a BO for kernel internal use.
418 void amdgpu_bo_free_kernel(struct amdgpu_bo **bo, u64 *gpu_addr,
424 if (likely(amdgpu_bo_reserve(*bo, true) == 0)) {
426 amdgpu_bo_kunmap(*bo);
428 amdgpu_bo_unpin(*bo);
429 amdgpu_bo_unreserve(*bo);
440 /* Validate bo size is bit bigger then the request domain */
441 static bool amdgpu_bo_validate_size(struct amdgpu_device *adev,
442 unsigned long size, u32 domain)
444 struct ttm_mem_type_manager *man = NULL;
447 * If GTT is part of requested domains the check must succeed to
448 * allow fall back to GTT
450 if (domain & AMDGPU_GEM_DOMAIN_GTT) {
451 man = &adev->mman.bdev.man[TTM_PL_TT];
453 if (size < (man->size << PAGE_SHIFT))
459 if (domain & AMDGPU_GEM_DOMAIN_VRAM) {
460 man = &adev->mman.bdev.man[TTM_PL_VRAM];
462 if (size < (man->size << PAGE_SHIFT))
469 /* TODO add more domains checks, such as AMDGPU_GEM_DOMAIN_CPU */
473 DRM_DEBUG("BO size %lu > total memory in domain: %llu\n", size,
474 man->size << PAGE_SHIFT);
478 bool amdgpu_bo_support_uswc(u64 bo_flags)
482 /* XXX: Write-combined CPU mappings of GTT seem broken on 32-bit
483 * See https://bugs.freedesktop.org/show_bug.cgi?id=84627
486 #elif defined(CONFIG_X86) && !defined(CONFIG_X86_PAT)
487 /* Don't try to enable write-combining when it can't work, or things
489 * See https://bugs.freedesktop.org/show_bug.cgi?id=88758
492 #ifndef CONFIG_COMPILE_TEST
493 #warning Please enable CONFIG_MTRR and CONFIG_X86_PAT for better performance \
494 thanks to write-combining
497 if (bo_flags & AMDGPU_GEM_CREATE_CPU_GTT_USWC)
498 DRM_INFO_ONCE("Please enable CONFIG_MTRR and CONFIG_X86_PAT for "
499 "better performance thanks to write-combining\n");
502 /* For architectures that don't support WC memory,
503 * mask out the WC flag from the BO
505 if (!drm_arch_can_wc_memory())
512 static int amdgpu_bo_do_create(struct amdgpu_device *adev,
513 struct amdgpu_bo_param *bp,
514 struct amdgpu_bo **bo_ptr)
516 struct ttm_operation_ctx ctx = {
517 .interruptible = (bp->type != ttm_bo_type_kernel),
518 .no_wait_gpu = bp->no_wait_gpu,
520 .flags = bp->type != ttm_bo_type_kernel ?
521 TTM_OPT_FLAG_ALLOW_RES_EVICT : 0
523 struct amdgpu_bo *bo;
524 unsigned long page_align, size = bp->size;
528 /* Note that GDS/GWS/OA allocates 1 page per byte/resource. */
529 if (bp->domain & (AMDGPU_GEM_DOMAIN_GWS | AMDGPU_GEM_DOMAIN_OA)) {
530 /* GWS and OA don't need any alignment. */
531 page_align = bp->byte_align;
533 } else if (bp->domain & AMDGPU_GEM_DOMAIN_GDS) {
534 /* Both size and alignment must be a multiple of 4. */
535 page_align = ALIGN(bp->byte_align, 4);
536 size = ALIGN(size, 4) << PAGE_SHIFT;
538 /* Memory should be aligned at least to a page size. */
539 page_align = ALIGN(bp->byte_align, PAGE_SIZE) >> PAGE_SHIFT;
540 size = ALIGN(size, PAGE_SIZE);
543 if (!amdgpu_bo_validate_size(adev, size, bp->domain))
548 acc_size = ttm_bo_dma_acc_size(&adev->mman.bdev, size,
549 sizeof(struct amdgpu_bo));
551 bo = kzalloc(sizeof(struct amdgpu_bo), GFP_KERNEL);
554 drm_gem_private_object_init(adev->ddev, &bo->tbo.base, size);
555 INIT_LIST_HEAD(&bo->shadow_list);
557 bo->preferred_domains = bp->preferred_domain ? bp->preferred_domain :
559 bo->allowed_domains = bo->preferred_domains;
560 if (bp->type != ttm_bo_type_kernel &&
561 bo->allowed_domains == AMDGPU_GEM_DOMAIN_VRAM)
562 bo->allowed_domains |= AMDGPU_GEM_DOMAIN_GTT;
564 bo->flags = bp->flags;
566 if (!amdgpu_bo_support_uswc(bo->flags))
567 bo->flags &= ~AMDGPU_GEM_CREATE_CPU_GTT_USWC;
569 bo->tbo.bdev = &adev->mman.bdev;
570 if (bp->domain & (AMDGPU_GEM_DOMAIN_GWS | AMDGPU_GEM_DOMAIN_OA |
571 AMDGPU_GEM_DOMAIN_GDS))
572 amdgpu_bo_placement_from_domain(bo, AMDGPU_GEM_DOMAIN_CPU);
574 amdgpu_bo_placement_from_domain(bo, bp->domain);
575 if (bp->type == ttm_bo_type_kernel)
576 bo->tbo.priority = 1;
578 r = ttm_bo_init_reserved(&adev->mman.bdev, &bo->tbo, size, bp->type,
579 &bo->placement, page_align, &ctx, acc_size,
580 NULL, bp->resv, &amdgpu_bo_destroy);
581 if (unlikely(r != 0))
584 if (!amdgpu_gmc_vram_full_visible(&adev->gmc) &&
585 bo->tbo.mem.mem_type == TTM_PL_VRAM &&
586 bo->tbo.mem.start < adev->gmc.visible_vram_size >> PAGE_SHIFT)
587 amdgpu_cs_report_moved_bytes(adev, ctx.bytes_moved,
590 amdgpu_cs_report_moved_bytes(adev, ctx.bytes_moved, 0);
592 if (bp->flags & AMDGPU_GEM_CREATE_VRAM_CLEARED &&
593 bo->tbo.mem.placement & TTM_PL_FLAG_VRAM) {
594 struct dma_fence *fence;
596 r = amdgpu_fill_buffer(bo, 0, bo->tbo.base.resv, &fence);
600 amdgpu_bo_fence(bo, fence, false);
601 dma_fence_put(bo->tbo.moving);
602 bo->tbo.moving = dma_fence_get(fence);
603 dma_fence_put(fence);
606 amdgpu_bo_unreserve(bo);
609 trace_amdgpu_bo_create(bo);
611 /* Treat CPU_ACCESS_REQUIRED only as a hint if given by UMD */
612 if (bp->type == ttm_bo_type_device)
613 bo->flags &= ~AMDGPU_GEM_CREATE_CPU_ACCESS_REQUIRED;
619 dma_resv_unlock(bo->tbo.base.resv);
620 amdgpu_bo_unref(&bo);
624 static int amdgpu_bo_create_shadow(struct amdgpu_device *adev,
626 struct amdgpu_bo *bo)
628 struct amdgpu_bo_param bp;
634 memset(&bp, 0, sizeof(bp));
636 bp.domain = AMDGPU_GEM_DOMAIN_GTT;
637 bp.flags = AMDGPU_GEM_CREATE_CPU_GTT_USWC |
638 AMDGPU_GEM_CREATE_SHADOW;
639 bp.type = ttm_bo_type_kernel;
640 bp.resv = bo->tbo.base.resv;
642 r = amdgpu_bo_do_create(adev, &bp, &bo->shadow);
644 bo->shadow->parent = amdgpu_bo_ref(bo);
645 mutex_lock(&adev->shadow_list_lock);
646 list_add_tail(&bo->shadow->shadow_list, &adev->shadow_list);
647 mutex_unlock(&adev->shadow_list_lock);
654 * amdgpu_bo_create - create an &amdgpu_bo buffer object
655 * @adev: amdgpu device object
656 * @bp: parameters to be used for the buffer object
657 * @bo_ptr: pointer to the buffer object pointer
659 * Creates an &amdgpu_bo buffer object; and if requested, also creates a
661 * Shadow object is used to backup the original buffer object, and is always
665 * 0 for success or a negative error code on failure.
667 int amdgpu_bo_create(struct amdgpu_device *adev,
668 struct amdgpu_bo_param *bp,
669 struct amdgpu_bo **bo_ptr)
671 u64 flags = bp->flags;
674 bp->flags = bp->flags & ~AMDGPU_GEM_CREATE_SHADOW;
675 r = amdgpu_bo_do_create(adev, bp, bo_ptr);
679 if ((flags & AMDGPU_GEM_CREATE_SHADOW) && !(adev->flags & AMD_IS_APU)) {
681 WARN_ON(dma_resv_lock((*bo_ptr)->tbo.base.resv,
684 r = amdgpu_bo_create_shadow(adev, bp->size, *bo_ptr);
687 dma_resv_unlock((*bo_ptr)->tbo.base.resv);
690 amdgpu_bo_unref(bo_ptr);
697 * amdgpu_bo_validate - validate an &amdgpu_bo buffer object
698 * @bo: pointer to the buffer object
700 * Sets placement according to domain; and changes placement and caching
701 * policy of the buffer object according to the placement.
702 * This is used for validating shadow bos. It calls ttm_bo_validate() to
703 * make sure the buffer is resident where it needs to be.
706 * 0 for success or a negative error code on failure.
708 int amdgpu_bo_validate(struct amdgpu_bo *bo)
710 struct ttm_operation_ctx ctx = { false, false };
717 domain = bo->preferred_domains;
720 amdgpu_bo_placement_from_domain(bo, domain);
721 r = ttm_bo_validate(&bo->tbo, &bo->placement, &ctx);
722 if (unlikely(r == -ENOMEM) && domain != bo->allowed_domains) {
723 domain = bo->allowed_domains;
731 * amdgpu_bo_restore_shadow - restore an &amdgpu_bo shadow
733 * @shadow: &amdgpu_bo shadow to be restored
734 * @fence: dma_fence associated with the operation
736 * Copies a buffer object's shadow content back to the object.
737 * This is used for recovering a buffer from its shadow in case of a gpu
738 * reset where vram context may be lost.
741 * 0 for success or a negative error code on failure.
743 int amdgpu_bo_restore_shadow(struct amdgpu_bo *shadow, struct dma_fence **fence)
746 struct amdgpu_device *adev = amdgpu_ttm_adev(shadow->tbo.bdev);
747 struct amdgpu_ring *ring = adev->mman.buffer_funcs_ring;
748 uint64_t shadow_addr, parent_addr;
750 shadow_addr = amdgpu_bo_gpu_offset(shadow);
751 parent_addr = amdgpu_bo_gpu_offset(shadow->parent);
753 return amdgpu_copy_buffer(ring, shadow_addr, parent_addr,
754 amdgpu_bo_size(shadow), NULL, fence,
759 * amdgpu_bo_kmap - map an &amdgpu_bo buffer object
760 * @bo: &amdgpu_bo buffer object to be mapped
761 * @ptr: kernel virtual address to be returned
763 * Calls ttm_bo_kmap() to set up the kernel virtual mapping; calls
764 * amdgpu_bo_kptr() to get the kernel virtual address.
767 * 0 for success or a negative error code on failure.
769 int amdgpu_bo_kmap(struct amdgpu_bo *bo, void **ptr)
774 if (bo->flags & AMDGPU_GEM_CREATE_NO_CPU_ACCESS)
777 kptr = amdgpu_bo_kptr(bo);
784 r = dma_resv_wait_timeout_rcu(bo->tbo.base.resv, false, false,
785 MAX_SCHEDULE_TIMEOUT);
789 r = ttm_bo_kmap(&bo->tbo, 0, bo->tbo.num_pages, &bo->kmap);
794 *ptr = amdgpu_bo_kptr(bo);
800 * amdgpu_bo_kptr - returns a kernel virtual address of the buffer object
801 * @bo: &amdgpu_bo buffer object
803 * Calls ttm_kmap_obj_virtual() to get the kernel virtual address
806 * the virtual address of a buffer object area.
808 void *amdgpu_bo_kptr(struct amdgpu_bo *bo)
812 return ttm_kmap_obj_virtual(&bo->kmap, &is_iomem);
816 * amdgpu_bo_kunmap - unmap an &amdgpu_bo buffer object
817 * @bo: &amdgpu_bo buffer object to be unmapped
819 * Unmaps a kernel map set up by amdgpu_bo_kmap().
821 void amdgpu_bo_kunmap(struct amdgpu_bo *bo)
824 ttm_bo_kunmap(&bo->kmap);
828 * amdgpu_bo_ref - reference an &amdgpu_bo buffer object
829 * @bo: &amdgpu_bo buffer object
831 * References the contained &ttm_buffer_object.
834 * a refcounted pointer to the &amdgpu_bo buffer object.
836 struct amdgpu_bo *amdgpu_bo_ref(struct amdgpu_bo *bo)
841 ttm_bo_get(&bo->tbo);
846 * amdgpu_bo_unref - unreference an &amdgpu_bo buffer object
847 * @bo: &amdgpu_bo buffer object
849 * Unreferences the contained &ttm_buffer_object and clear the pointer
851 void amdgpu_bo_unref(struct amdgpu_bo **bo)
853 struct ttm_buffer_object *tbo;
864 * amdgpu_bo_pin_restricted - pin an &amdgpu_bo buffer object
865 * @bo: &amdgpu_bo buffer object to be pinned
866 * @domain: domain to be pinned to
867 * @min_offset: the start of requested address range
868 * @max_offset: the end of requested address range
870 * Pins the buffer object according to requested domain and address range. If
871 * the memory is unbound gart memory, binds the pages into gart table. Adjusts
872 * pin_count and pin_size accordingly.
874 * Pinning means to lock pages in memory along with keeping them at a fixed
875 * offset. It is required when a buffer can not be moved, for example, when
876 * a display buffer is being scanned out.
878 * Compared with amdgpu_bo_pin(), this function gives more flexibility on
879 * where to pin a buffer if there are specific restrictions on where a buffer
883 * 0 for success or a negative error code on failure.
885 int amdgpu_bo_pin_restricted(struct amdgpu_bo *bo, u32 domain,
886 u64 min_offset, u64 max_offset)
888 struct amdgpu_device *adev = amdgpu_ttm_adev(bo->tbo.bdev);
889 struct ttm_operation_ctx ctx = { false, false };
892 if (amdgpu_ttm_tt_get_usermm(bo->tbo.ttm))
895 if (WARN_ON_ONCE(min_offset > max_offset))
898 /* A shared bo cannot be migrated to VRAM */
899 if (bo->prime_shared_count) {
900 if (domain & AMDGPU_GEM_DOMAIN_GTT)
901 domain = AMDGPU_GEM_DOMAIN_GTT;
906 /* This assumes only APU display buffers are pinned with (VRAM|GTT).
907 * See function amdgpu_display_supported_domains()
909 domain = amdgpu_bo_get_preferred_pin_domain(adev, domain);
912 uint32_t mem_type = bo->tbo.mem.mem_type;
914 if (!(domain & amdgpu_mem_type_to_domain(mem_type)))
919 if (max_offset != 0) {
920 u64 domain_start = bo->tbo.bdev->man[mem_type].gpu_offset;
921 WARN_ON_ONCE(max_offset <
922 (amdgpu_bo_gpu_offset(bo) - domain_start));
928 bo->flags |= AMDGPU_GEM_CREATE_VRAM_CONTIGUOUS;
929 /* force to pin into visible video ram */
930 if (!(bo->flags & AMDGPU_GEM_CREATE_NO_CPU_ACCESS))
931 bo->flags |= AMDGPU_GEM_CREATE_CPU_ACCESS_REQUIRED;
932 amdgpu_bo_placement_from_domain(bo, domain);
933 for (i = 0; i < bo->placement.num_placement; i++) {
936 fpfn = min_offset >> PAGE_SHIFT;
937 lpfn = max_offset >> PAGE_SHIFT;
939 if (fpfn > bo->placements[i].fpfn)
940 bo->placements[i].fpfn = fpfn;
941 if (!bo->placements[i].lpfn ||
942 (lpfn && lpfn < bo->placements[i].lpfn))
943 bo->placements[i].lpfn = lpfn;
944 bo->placements[i].flags |= TTM_PL_FLAG_NO_EVICT;
947 r = ttm_bo_validate(&bo->tbo, &bo->placement, &ctx);
949 dev_err(adev->dev, "%p pin failed\n", bo);
955 domain = amdgpu_mem_type_to_domain(bo->tbo.mem.mem_type);
956 if (domain == AMDGPU_GEM_DOMAIN_VRAM) {
957 atomic64_add(amdgpu_bo_size(bo), &adev->vram_pin_size);
958 atomic64_add(amdgpu_vram_mgr_bo_visible_size(bo),
959 &adev->visible_pin_size);
960 } else if (domain == AMDGPU_GEM_DOMAIN_GTT) {
961 atomic64_add(amdgpu_bo_size(bo), &adev->gart_pin_size);
969 * amdgpu_bo_pin - pin an &amdgpu_bo buffer object
970 * @bo: &amdgpu_bo buffer object to be pinned
971 * @domain: domain to be pinned to
973 * A simple wrapper to amdgpu_bo_pin_restricted().
974 * Provides a simpler API for buffers that do not have any strict restrictions
975 * on where a buffer must be located.
978 * 0 for success or a negative error code on failure.
980 int amdgpu_bo_pin(struct amdgpu_bo *bo, u32 domain)
982 return amdgpu_bo_pin_restricted(bo, domain, 0, 0);
986 * amdgpu_bo_unpin - unpin an &amdgpu_bo buffer object
987 * @bo: &amdgpu_bo buffer object to be unpinned
989 * Decreases the pin_count, and clears the flags if pin_count reaches 0.
990 * Changes placement and pin size accordingly.
993 * 0 for success or a negative error code on failure.
995 int amdgpu_bo_unpin(struct amdgpu_bo *bo)
997 struct amdgpu_device *adev = amdgpu_ttm_adev(bo->tbo.bdev);
998 struct ttm_operation_ctx ctx = { false, false };
1001 if (WARN_ON_ONCE(!bo->pin_count)) {
1002 dev_warn(adev->dev, "%p unpin not necessary\n", bo);
1009 amdgpu_bo_subtract_pin_size(bo);
1011 for (i = 0; i < bo->placement.num_placement; i++) {
1012 bo->placements[i].lpfn = 0;
1013 bo->placements[i].flags &= ~TTM_PL_FLAG_NO_EVICT;
1015 r = ttm_bo_validate(&bo->tbo, &bo->placement, &ctx);
1017 dev_err(adev->dev, "%p validate failed for unpin\n", bo);
1023 * amdgpu_bo_evict_vram - evict VRAM buffers
1024 * @adev: amdgpu device object
1026 * Evicts all VRAM buffers on the lru list of the memory type.
1027 * Mainly used for evicting vram at suspend time.
1030 * 0 for success or a negative error code on failure.
1032 int amdgpu_bo_evict_vram(struct amdgpu_device *adev)
1034 /* late 2.6.33 fix IGP hibernate - we need pm ops to do this correct */
1035 #ifndef CONFIG_HIBERNATION
1036 if (adev->flags & AMD_IS_APU) {
1037 /* Useless to evict on IGP chips */
1041 return ttm_bo_evict_mm(&adev->mman.bdev, TTM_PL_VRAM);
1044 static const char *amdgpu_vram_names[] = {
1058 * amdgpu_bo_init - initialize memory manager
1059 * @adev: amdgpu device object
1061 * Calls amdgpu_ttm_init() to initialize amdgpu memory manager.
1064 * 0 for success or a negative error code on failure.
1066 int amdgpu_bo_init(struct amdgpu_device *adev)
1068 /* reserve PAT memory space to WC for VRAM */
1069 arch_io_reserve_memtype_wc(adev->gmc.aper_base,
1070 adev->gmc.aper_size);
1072 /* Add an MTRR for the VRAM */
1073 adev->gmc.vram_mtrr = arch_phys_wc_add(adev->gmc.aper_base,
1074 adev->gmc.aper_size);
1075 DRM_INFO("Detected VRAM RAM=%lluM, BAR=%lluM\n",
1076 adev->gmc.mc_vram_size >> 20,
1077 (unsigned long long)adev->gmc.aper_size >> 20);
1078 DRM_INFO("RAM width %dbits %s\n",
1079 adev->gmc.vram_width, amdgpu_vram_names[adev->gmc.vram_type]);
1080 return amdgpu_ttm_init(adev);
1084 * amdgpu_bo_late_init - late init
1085 * @adev: amdgpu device object
1087 * Calls amdgpu_ttm_late_init() to free resources used earlier during
1091 * 0 for success or a negative error code on failure.
1093 int amdgpu_bo_late_init(struct amdgpu_device *adev)
1095 amdgpu_ttm_late_init(adev);
1101 * amdgpu_bo_fini - tear down memory manager
1102 * @adev: amdgpu device object
1104 * Reverses amdgpu_bo_init() to tear down memory manager.
1106 void amdgpu_bo_fini(struct amdgpu_device *adev)
1108 amdgpu_ttm_fini(adev);
1109 arch_phys_wc_del(adev->gmc.vram_mtrr);
1110 arch_io_free_memtype_wc(adev->gmc.aper_base, adev->gmc.aper_size);
1114 * amdgpu_bo_fbdev_mmap - mmap fbdev memory
1115 * @bo: &amdgpu_bo buffer object
1116 * @vma: vma as input from the fbdev mmap method
1118 * Calls ttm_fbdev_mmap() to mmap fbdev memory if it is backed by a bo.
1121 * 0 for success or a negative error code on failure.
1123 int amdgpu_bo_fbdev_mmap(struct amdgpu_bo *bo,
1124 struct vm_area_struct *vma)
1126 if (vma->vm_pgoff != 0)
1129 return ttm_bo_mmap_obj(vma, &bo->tbo);
1133 * amdgpu_bo_set_tiling_flags - set tiling flags
1134 * @bo: &amdgpu_bo buffer object
1135 * @tiling_flags: new flags
1137 * Sets buffer object's tiling flags with the new one. Used by GEM ioctl or
1138 * kernel driver to set the tiling flags on a buffer.
1141 * 0 for success or a negative error code on failure.
1143 int amdgpu_bo_set_tiling_flags(struct amdgpu_bo *bo, u64 tiling_flags)
1145 struct amdgpu_device *adev = amdgpu_ttm_adev(bo->tbo.bdev);
1147 if (adev->family <= AMDGPU_FAMILY_CZ &&
1148 AMDGPU_TILING_GET(tiling_flags, TILE_SPLIT) > 6)
1151 bo->tiling_flags = tiling_flags;
1156 * amdgpu_bo_get_tiling_flags - get tiling flags
1157 * @bo: &amdgpu_bo buffer object
1158 * @tiling_flags: returned flags
1160 * Gets buffer object's tiling flags. Used by GEM ioctl or kernel driver to
1161 * set the tiling flags on a buffer.
1163 void amdgpu_bo_get_tiling_flags(struct amdgpu_bo *bo, u64 *tiling_flags)
1165 dma_resv_assert_held(bo->tbo.base.resv);
1168 *tiling_flags = bo->tiling_flags;
1172 * amdgpu_bo_set_metadata - set metadata
1173 * @bo: &amdgpu_bo buffer object
1174 * @metadata: new metadata
1175 * @metadata_size: size of the new metadata
1176 * @flags: flags of the new metadata
1178 * Sets buffer object's metadata, its size and flags.
1179 * Used via GEM ioctl.
1182 * 0 for success or a negative error code on failure.
1184 int amdgpu_bo_set_metadata (struct amdgpu_bo *bo, void *metadata,
1185 uint32_t metadata_size, uint64_t flags)
1189 if (!metadata_size) {
1190 if (bo->metadata_size) {
1191 kfree(bo->metadata);
1192 bo->metadata = NULL;
1193 bo->metadata_size = 0;
1198 if (metadata == NULL)
1201 buffer = kmemdup(metadata, metadata_size, GFP_KERNEL);
1205 kfree(bo->metadata);
1206 bo->metadata_flags = flags;
1207 bo->metadata = buffer;
1208 bo->metadata_size = metadata_size;
1214 * amdgpu_bo_get_metadata - get metadata
1215 * @bo: &amdgpu_bo buffer object
1216 * @buffer: returned metadata
1217 * @buffer_size: size of the buffer
1218 * @metadata_size: size of the returned metadata
1219 * @flags: flags of the returned metadata
1221 * Gets buffer object's metadata, its size and flags. buffer_size shall not be
1222 * less than metadata_size.
1223 * Used via GEM ioctl.
1226 * 0 for success or a negative error code on failure.
1228 int amdgpu_bo_get_metadata(struct amdgpu_bo *bo, void *buffer,
1229 size_t buffer_size, uint32_t *metadata_size,
1232 if (!buffer && !metadata_size)
1236 if (buffer_size < bo->metadata_size)
1239 if (bo->metadata_size)
1240 memcpy(buffer, bo->metadata, bo->metadata_size);
1244 *metadata_size = bo->metadata_size;
1246 *flags = bo->metadata_flags;
1252 * amdgpu_bo_move_notify - notification about a memory move
1253 * @bo: pointer to a buffer object
1254 * @evict: if this move is evicting the buffer from the graphics address space
1255 * @new_mem: new information of the bufer object
1257 * Marks the corresponding &amdgpu_bo buffer object as invalid, also performs
1259 * TTM driver callback which is called when ttm moves a buffer.
1261 void amdgpu_bo_move_notify(struct ttm_buffer_object *bo,
1263 struct ttm_mem_reg *new_mem)
1265 struct amdgpu_device *adev = amdgpu_ttm_adev(bo->bdev);
1266 struct amdgpu_bo *abo;
1267 struct ttm_mem_reg *old_mem = &bo->mem;
1269 if (!amdgpu_bo_is_amdgpu_bo(bo))
1272 abo = ttm_to_amdgpu_bo(bo);
1273 amdgpu_vm_bo_invalidate(adev, abo, evict);
1275 amdgpu_bo_kunmap(abo);
1277 /* remember the eviction */
1279 atomic64_inc(&adev->num_evictions);
1281 /* update statistics */
1285 /* move_notify is called before move happens */
1286 trace_amdgpu_bo_move(abo, new_mem->mem_type, old_mem->mem_type);
1290 * amdgpu_bo_move_notify - notification about a BO being released
1291 * @bo: pointer to a buffer object
1293 * Wipes VRAM buffers whose contents should not be leaked before the
1294 * memory is released.
1296 void amdgpu_bo_release_notify(struct ttm_buffer_object *bo)
1298 struct dma_fence *fence = NULL;
1299 struct amdgpu_bo *abo;
1302 if (!amdgpu_bo_is_amdgpu_bo(bo))
1305 abo = ttm_to_amdgpu_bo(bo);
1308 amdgpu_amdkfd_unreserve_memory_limit(abo);
1310 if (bo->mem.mem_type != TTM_PL_VRAM || !bo->mem.mm_node ||
1311 !(abo->flags & AMDGPU_GEM_CREATE_VRAM_WIPE_ON_RELEASE))
1314 dma_resv_lock(bo->base.resv, NULL);
1316 r = amdgpu_fill_buffer(abo, AMDGPU_POISON, bo->base.resv, &fence);
1318 amdgpu_bo_fence(abo, fence, false);
1319 dma_fence_put(fence);
1322 dma_resv_unlock(bo->base.resv);
1326 * amdgpu_bo_fault_reserve_notify - notification about a memory fault
1327 * @bo: pointer to a buffer object
1329 * Notifies the driver we are taking a fault on this BO and have reserved it,
1330 * also performs bookkeeping.
1331 * TTM driver callback for dealing with vm faults.
1334 * 0 for success or a negative error code on failure.
1336 int amdgpu_bo_fault_reserve_notify(struct ttm_buffer_object *bo)
1338 struct amdgpu_device *adev = amdgpu_ttm_adev(bo->bdev);
1339 struct ttm_operation_ctx ctx = { false, false };
1340 struct amdgpu_bo *abo;
1341 unsigned long offset, size;
1344 if (!amdgpu_bo_is_amdgpu_bo(bo))
1347 abo = ttm_to_amdgpu_bo(bo);
1349 /* Remember that this BO was accessed by the CPU */
1350 abo->flags |= AMDGPU_GEM_CREATE_CPU_ACCESS_REQUIRED;
1352 if (bo->mem.mem_type != TTM_PL_VRAM)
1355 size = bo->mem.num_pages << PAGE_SHIFT;
1356 offset = bo->mem.start << PAGE_SHIFT;
1357 if ((offset + size) <= adev->gmc.visible_vram_size)
1360 /* Can't move a pinned BO to visible VRAM */
1361 if (abo->pin_count > 0)
1364 /* hurrah the memory is not visible ! */
1365 atomic64_inc(&adev->num_vram_cpu_page_faults);
1366 amdgpu_bo_placement_from_domain(abo, AMDGPU_GEM_DOMAIN_VRAM |
1367 AMDGPU_GEM_DOMAIN_GTT);
1369 /* Avoid costly evictions; only set GTT as a busy placement */
1370 abo->placement.num_busy_placement = 1;
1371 abo->placement.busy_placement = &abo->placements[1];
1373 r = ttm_bo_validate(bo, &abo->placement, &ctx);
1374 if (unlikely(r != 0))
1377 offset = bo->mem.start << PAGE_SHIFT;
1378 /* this should never happen */
1379 if (bo->mem.mem_type == TTM_PL_VRAM &&
1380 (offset + size) > adev->gmc.visible_vram_size)
1387 * amdgpu_bo_fence - add fence to buffer object
1389 * @bo: buffer object in question
1390 * @fence: fence to add
1391 * @shared: true if fence should be added shared
1394 void amdgpu_bo_fence(struct amdgpu_bo *bo, struct dma_fence *fence,
1397 struct dma_resv *resv = bo->tbo.base.resv;
1400 dma_resv_add_shared_fence(resv, fence);
1402 dma_resv_add_excl_fence(resv, fence);
1406 * amdgpu_sync_wait_resv - Wait for BO reservation fences
1408 * @bo: buffer object
1409 * @owner: fence owner
1410 * @intr: Whether the wait is interruptible
1413 * 0 on success, errno otherwise.
1415 int amdgpu_bo_sync_wait(struct amdgpu_bo *bo, void *owner, bool intr)
1417 struct amdgpu_device *adev = amdgpu_ttm_adev(bo->tbo.bdev);
1418 struct amdgpu_sync sync;
1421 amdgpu_sync_create(&sync);
1422 amdgpu_sync_resv(adev, &sync, bo->tbo.base.resv, owner, false);
1423 r = amdgpu_sync_wait(&sync, intr);
1424 amdgpu_sync_free(&sync);
1430 * amdgpu_bo_gpu_offset - return GPU offset of bo
1431 * @bo: amdgpu object for which we query the offset
1433 * Note: object should either be pinned or reserved when calling this
1434 * function, it might be useful to add check for this for debugging.
1437 * current GPU offset of the object.
1439 u64 amdgpu_bo_gpu_offset(struct amdgpu_bo *bo)
1441 WARN_ON_ONCE(bo->tbo.mem.mem_type == TTM_PL_SYSTEM);
1442 WARN_ON_ONCE(!dma_resv_is_locked(bo->tbo.base.resv) &&
1443 !bo->pin_count && bo->tbo.type != ttm_bo_type_kernel);
1444 WARN_ON_ONCE(bo->tbo.mem.start == AMDGPU_BO_INVALID_OFFSET);
1445 WARN_ON_ONCE(bo->tbo.mem.mem_type == TTM_PL_VRAM &&
1446 !(bo->flags & AMDGPU_GEM_CREATE_VRAM_CONTIGUOUS));
1448 return amdgpu_gmc_sign_extend(bo->tbo.offset);
1452 * amdgpu_bo_get_preferred_pin_domain - get preferred domain for scanout
1453 * @adev: amdgpu device object
1454 * @domain: allowed :ref:`memory domains <amdgpu_memory_domains>`
1457 * Which of the allowed domains is preferred for pinning the BO for scanout.
1459 uint32_t amdgpu_bo_get_preferred_pin_domain(struct amdgpu_device *adev,
1462 if (domain == (AMDGPU_GEM_DOMAIN_VRAM | AMDGPU_GEM_DOMAIN_GTT)) {
1463 domain = AMDGPU_GEM_DOMAIN_VRAM;
1464 if (adev->gmc.real_vram_size <= AMDGPU_SG_THRESHOLD)
1465 domain = AMDGPU_GEM_DOMAIN_GTT;