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>
34 #include <linux/dma-buf.h>
36 #include <drm/amdgpu_drm.h>
37 #include <drm/drm_cache.h>
39 #include "amdgpu_trace.h"
40 #include "amdgpu_amdkfd.h"
45 * This defines the interfaces to operate on an &amdgpu_bo buffer object which
46 * represents memory used by driver (VRAM, system memory, etc.). The driver
47 * provides DRM/GEM APIs to userspace. DRM/GEM APIs then use these interfaces
48 * to create/destroy/set buffer object which are then managed by the kernel TTM
50 * The interfaces are also used internally by kernel clients, including gfx,
51 * uvd, etc. for kernel managed allocations used by the GPU.
56 * amdgpu_bo_subtract_pin_size - Remove BO from pin_size accounting
58 * @bo: &amdgpu_bo buffer object
60 * This function is called when a BO stops being pinned, and updates the
61 * &amdgpu_device pin_size values accordingly.
63 static void amdgpu_bo_subtract_pin_size(struct amdgpu_bo *bo)
65 struct amdgpu_device *adev = amdgpu_ttm_adev(bo->tbo.bdev);
67 if (bo->tbo.mem.mem_type == TTM_PL_VRAM) {
68 atomic64_sub(amdgpu_bo_size(bo), &adev->vram_pin_size);
69 atomic64_sub(amdgpu_vram_mgr_bo_visible_size(bo),
70 &adev->visible_pin_size);
71 } else if (bo->tbo.mem.mem_type == TTM_PL_TT) {
72 atomic64_sub(amdgpu_bo_size(bo), &adev->gart_pin_size);
76 static void amdgpu_bo_destroy(struct ttm_buffer_object *tbo)
78 struct amdgpu_device *adev = amdgpu_ttm_adev(tbo->bdev);
79 struct amdgpu_bo *bo = ttm_to_amdgpu_bo(tbo);
81 if (bo->tbo.pin_count > 0)
82 amdgpu_bo_subtract_pin_size(bo);
86 if (bo->tbo.base.import_attach)
87 drm_prime_gem_destroy(&bo->tbo.base, bo->tbo.sg);
88 drm_gem_object_release(&bo->tbo.base);
89 /* in case amdgpu_device_recover_vram got NULL of bo->parent */
90 if (!list_empty(&bo->shadow_list)) {
91 mutex_lock(&adev->shadow_list_lock);
92 list_del_init(&bo->shadow_list);
93 mutex_unlock(&adev->shadow_list_lock);
95 amdgpu_bo_unref(&bo->parent);
102 * amdgpu_bo_is_amdgpu_bo - check if the buffer object is an &amdgpu_bo
103 * @bo: buffer object to be checked
105 * Uses destroy function associated with the object to determine if this is
109 * true if the object belongs to &amdgpu_bo, false if not.
111 bool amdgpu_bo_is_amdgpu_bo(struct ttm_buffer_object *bo)
113 if (bo->destroy == &amdgpu_bo_destroy)
119 * amdgpu_bo_placement_from_domain - set buffer's placement
120 * @abo: &amdgpu_bo buffer object whose placement is to be set
121 * @domain: requested domain
123 * Sets buffer's placement according to requested domain and the buffer's
126 void amdgpu_bo_placement_from_domain(struct amdgpu_bo *abo, u32 domain)
128 struct amdgpu_device *adev = amdgpu_ttm_adev(abo->tbo.bdev);
129 struct ttm_placement *placement = &abo->placement;
130 struct ttm_place *places = abo->placements;
131 u64 flags = abo->flags;
134 if (domain & AMDGPU_GEM_DOMAIN_VRAM) {
135 unsigned visible_pfn = adev->gmc.visible_vram_size >> PAGE_SHIFT;
139 places[c].mem_type = TTM_PL_VRAM;
142 if (flags & AMDGPU_GEM_CREATE_CPU_ACCESS_REQUIRED)
143 places[c].lpfn = visible_pfn;
145 places[c].flags |= TTM_PL_FLAG_TOPDOWN;
147 if (flags & AMDGPU_GEM_CREATE_VRAM_CONTIGUOUS)
148 places[c].flags |= TTM_PL_FLAG_CONTIGUOUS;
152 if (domain & AMDGPU_GEM_DOMAIN_GTT) {
155 places[c].mem_type = TTM_PL_TT;
160 if (domain & AMDGPU_GEM_DOMAIN_CPU) {
163 places[c].mem_type = TTM_PL_SYSTEM;
168 if (domain & AMDGPU_GEM_DOMAIN_GDS) {
171 places[c].mem_type = AMDGPU_PL_GDS;
176 if (domain & AMDGPU_GEM_DOMAIN_GWS) {
179 places[c].mem_type = AMDGPU_PL_GWS;
184 if (domain & AMDGPU_GEM_DOMAIN_OA) {
187 places[c].mem_type = AMDGPU_PL_OA;
195 places[c].mem_type = TTM_PL_SYSTEM;
200 BUG_ON(c >= AMDGPU_BO_MAX_PLACEMENTS);
202 placement->num_placement = c;
203 placement->placement = places;
205 placement->num_busy_placement = c;
206 placement->busy_placement = places;
210 * amdgpu_bo_create_reserved - create reserved BO for kernel use
212 * @adev: amdgpu device object
213 * @size: size for the new BO
214 * @align: alignment for the new BO
215 * @domain: where to place it
216 * @bo_ptr: used to initialize BOs in structures
217 * @gpu_addr: GPU addr of the pinned BO
218 * @cpu_addr: optional CPU address mapping
220 * Allocates and pins a BO for kernel internal use, and returns it still
223 * Note: For bo_ptr new BO is only created if bo_ptr points to NULL.
226 * 0 on success, negative error code otherwise.
228 int amdgpu_bo_create_reserved(struct amdgpu_device *adev,
229 unsigned long size, int align,
230 u32 domain, struct amdgpu_bo **bo_ptr,
231 u64 *gpu_addr, void **cpu_addr)
233 struct amdgpu_bo_param bp;
238 amdgpu_bo_unref(bo_ptr);
242 memset(&bp, 0, sizeof(bp));
244 bp.byte_align = align;
246 bp.flags = cpu_addr ? AMDGPU_GEM_CREATE_CPU_ACCESS_REQUIRED
247 : AMDGPU_GEM_CREATE_NO_CPU_ACCESS;
248 bp.flags |= AMDGPU_GEM_CREATE_VRAM_CONTIGUOUS;
249 bp.type = ttm_bo_type_kernel;
253 r = amdgpu_bo_create(adev, &bp, bo_ptr);
255 dev_err(adev->dev, "(%d) failed to allocate kernel bo\n",
262 r = amdgpu_bo_reserve(*bo_ptr, false);
264 dev_err(adev->dev, "(%d) failed to reserve kernel bo\n", r);
268 r = amdgpu_bo_pin(*bo_ptr, domain);
270 dev_err(adev->dev, "(%d) kernel bo pin failed\n", r);
271 goto error_unreserve;
274 r = amdgpu_ttm_alloc_gart(&(*bo_ptr)->tbo);
276 dev_err(adev->dev, "%p bind failed\n", *bo_ptr);
281 *gpu_addr = amdgpu_bo_gpu_offset(*bo_ptr);
284 r = amdgpu_bo_kmap(*bo_ptr, cpu_addr);
286 dev_err(adev->dev, "(%d) kernel bo map failed\n", r);
294 amdgpu_bo_unpin(*bo_ptr);
296 amdgpu_bo_unreserve(*bo_ptr);
300 amdgpu_bo_unref(bo_ptr);
306 * amdgpu_bo_create_kernel - create BO for kernel use
308 * @adev: amdgpu device object
309 * @size: size for the new BO
310 * @align: alignment for the new BO
311 * @domain: where to place it
312 * @bo_ptr: used to initialize BOs in structures
313 * @gpu_addr: GPU addr of the pinned BO
314 * @cpu_addr: optional CPU address mapping
316 * Allocates and pins a BO for kernel internal use.
318 * Note: For bo_ptr new BO is only created if bo_ptr points to NULL.
321 * 0 on success, negative error code otherwise.
323 int amdgpu_bo_create_kernel(struct amdgpu_device *adev,
324 unsigned long size, int align,
325 u32 domain, struct amdgpu_bo **bo_ptr,
326 u64 *gpu_addr, void **cpu_addr)
330 r = amdgpu_bo_create_reserved(adev, size, align, domain, bo_ptr,
337 amdgpu_bo_unreserve(*bo_ptr);
343 * amdgpu_bo_create_kernel_at - create BO for kernel use at specific location
345 * @adev: amdgpu device object
346 * @offset: offset of the BO
347 * @size: size of the BO
348 * @domain: where to place it
349 * @bo_ptr: used to initialize BOs in structures
350 * @cpu_addr: optional CPU address mapping
352 * Creates a kernel BO at a specific offset in the address space of the domain.
355 * 0 on success, negative error code otherwise.
357 int amdgpu_bo_create_kernel_at(struct amdgpu_device *adev,
358 uint64_t offset, uint64_t size, uint32_t domain,
359 struct amdgpu_bo **bo_ptr, void **cpu_addr)
361 struct ttm_operation_ctx ctx = { false, false };
366 size = ALIGN(size, PAGE_SIZE);
368 r = amdgpu_bo_create_reserved(adev, size, PAGE_SIZE, domain, bo_ptr,
373 if ((*bo_ptr) == NULL)
377 * Remove the original mem node and create a new one at the request
381 amdgpu_bo_kunmap(*bo_ptr);
383 ttm_resource_free(&(*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_resource_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 = ttm_manager_type(&adev->mman.bdev, TTM_PL_TT);
453 if (size < (man->size << PAGE_SHIFT))
459 if (domain & AMDGPU_GEM_DOMAIN_VRAM) {
460 man = ttm_manager_type(&adev->mman.bdev, 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_to_drm(adev), &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.mem_type == TTM_PL_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 };
714 if (bo->tbo.pin_count)
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);
911 if (bo->tbo.pin_count) {
912 uint32_t mem_type = bo->tbo.mem.mem_type;
914 if (!(domain & amdgpu_mem_type_to_domain(mem_type)))
917 ttm_bo_pin(&bo->tbo);
919 if (max_offset != 0) {
920 u64 domain_start = amdgpu_ttm_domain_start(adev,
922 WARN_ON_ONCE(max_offset <
923 (amdgpu_bo_gpu_offset(bo) - domain_start));
929 if (bo->tbo.base.import_attach)
930 dma_buf_pin(bo->tbo.base.import_attach);
932 bo->flags |= AMDGPU_GEM_CREATE_VRAM_CONTIGUOUS;
933 /* force to pin into visible video ram */
934 if (!(bo->flags & AMDGPU_GEM_CREATE_NO_CPU_ACCESS))
935 bo->flags |= AMDGPU_GEM_CREATE_CPU_ACCESS_REQUIRED;
936 amdgpu_bo_placement_from_domain(bo, domain);
937 for (i = 0; i < bo->placement.num_placement; i++) {
940 fpfn = min_offset >> PAGE_SHIFT;
941 lpfn = max_offset >> PAGE_SHIFT;
943 if (fpfn > bo->placements[i].fpfn)
944 bo->placements[i].fpfn = fpfn;
945 if (!bo->placements[i].lpfn ||
946 (lpfn && lpfn < bo->placements[i].lpfn))
947 bo->placements[i].lpfn = lpfn;
950 r = ttm_bo_validate(&bo->tbo, &bo->placement, &ctx);
952 dev_err(adev->dev, "%p pin failed\n", bo);
956 ttm_bo_pin(&bo->tbo);
958 domain = amdgpu_mem_type_to_domain(bo->tbo.mem.mem_type);
959 if (domain == AMDGPU_GEM_DOMAIN_VRAM) {
960 atomic64_add(amdgpu_bo_size(bo), &adev->vram_pin_size);
961 atomic64_add(amdgpu_vram_mgr_bo_visible_size(bo),
962 &adev->visible_pin_size);
963 } else if (domain == AMDGPU_GEM_DOMAIN_GTT) {
964 atomic64_add(amdgpu_bo_size(bo), &adev->gart_pin_size);
972 * amdgpu_bo_pin - pin an &amdgpu_bo buffer object
973 * @bo: &amdgpu_bo buffer object to be pinned
974 * @domain: domain to be pinned to
976 * A simple wrapper to amdgpu_bo_pin_restricted().
977 * Provides a simpler API for buffers that do not have any strict restrictions
978 * on where a buffer must be located.
981 * 0 for success or a negative error code on failure.
983 int amdgpu_bo_pin(struct amdgpu_bo *bo, u32 domain)
985 return amdgpu_bo_pin_restricted(bo, domain, 0, 0);
989 * amdgpu_bo_unpin - unpin an &amdgpu_bo buffer object
990 * @bo: &amdgpu_bo buffer object to be unpinned
992 * Decreases the pin_count, and clears the flags if pin_count reaches 0.
993 * Changes placement and pin size accordingly.
996 * 0 for success or a negative error code on failure.
998 void amdgpu_bo_unpin(struct amdgpu_bo *bo)
1000 ttm_bo_unpin(&bo->tbo);
1001 if (bo->tbo.pin_count)
1004 amdgpu_bo_subtract_pin_size(bo);
1006 if (bo->tbo.base.import_attach)
1007 dma_buf_unpin(bo->tbo.base.import_attach);
1011 * amdgpu_bo_evict_vram - evict VRAM buffers
1012 * @adev: amdgpu device object
1014 * Evicts all VRAM buffers on the lru list of the memory type.
1015 * Mainly used for evicting vram at suspend time.
1018 * 0 for success or a negative error code on failure.
1020 int amdgpu_bo_evict_vram(struct amdgpu_device *adev)
1022 struct ttm_resource_manager *man;
1024 /* late 2.6.33 fix IGP hibernate - we need pm ops to do this correct */
1025 #ifndef CONFIG_HIBERNATION
1026 if (adev->flags & AMD_IS_APU) {
1027 /* Useless to evict on IGP chips */
1032 man = ttm_manager_type(&adev->mman.bdev, TTM_PL_VRAM);
1033 return ttm_resource_manager_evict_all(&adev->mman.bdev, man);
1036 static const char *amdgpu_vram_names[] = {
1050 * amdgpu_bo_init - initialize memory manager
1051 * @adev: amdgpu device object
1053 * Calls amdgpu_ttm_init() to initialize amdgpu memory manager.
1056 * 0 for success or a negative error code on failure.
1058 int amdgpu_bo_init(struct amdgpu_device *adev)
1060 /* reserve PAT memory space to WC for VRAM */
1061 arch_io_reserve_memtype_wc(adev->gmc.aper_base,
1062 adev->gmc.aper_size);
1064 /* Add an MTRR for the VRAM */
1065 adev->gmc.vram_mtrr = arch_phys_wc_add(adev->gmc.aper_base,
1066 adev->gmc.aper_size);
1067 DRM_INFO("Detected VRAM RAM=%lluM, BAR=%lluM\n",
1068 adev->gmc.mc_vram_size >> 20,
1069 (unsigned long long)adev->gmc.aper_size >> 20);
1070 DRM_INFO("RAM width %dbits %s\n",
1071 adev->gmc.vram_width, amdgpu_vram_names[adev->gmc.vram_type]);
1072 return amdgpu_ttm_init(adev);
1076 * amdgpu_bo_late_init - late init
1077 * @adev: amdgpu device object
1079 * Calls amdgpu_ttm_late_init() to free resources used earlier during
1083 * 0 for success or a negative error code on failure.
1085 int amdgpu_bo_late_init(struct amdgpu_device *adev)
1087 amdgpu_ttm_late_init(adev);
1093 * amdgpu_bo_fini - tear down memory manager
1094 * @adev: amdgpu device object
1096 * Reverses amdgpu_bo_init() to tear down memory manager.
1098 void amdgpu_bo_fini(struct amdgpu_device *adev)
1100 amdgpu_ttm_fini(adev);
1101 arch_phys_wc_del(adev->gmc.vram_mtrr);
1102 arch_io_free_memtype_wc(adev->gmc.aper_base, adev->gmc.aper_size);
1106 * amdgpu_bo_fbdev_mmap - mmap fbdev memory
1107 * @bo: &amdgpu_bo buffer object
1108 * @vma: vma as input from the fbdev mmap method
1110 * Calls ttm_fbdev_mmap() to mmap fbdev memory if it is backed by a bo.
1113 * 0 for success or a negative error code on failure.
1115 int amdgpu_bo_fbdev_mmap(struct amdgpu_bo *bo,
1116 struct vm_area_struct *vma)
1118 if (vma->vm_pgoff != 0)
1121 return ttm_bo_mmap_obj(vma, &bo->tbo);
1125 * amdgpu_bo_set_tiling_flags - set tiling flags
1126 * @bo: &amdgpu_bo buffer object
1127 * @tiling_flags: new flags
1129 * Sets buffer object's tiling flags with the new one. Used by GEM ioctl or
1130 * kernel driver to set the tiling flags on a buffer.
1133 * 0 for success or a negative error code on failure.
1135 int amdgpu_bo_set_tiling_flags(struct amdgpu_bo *bo, u64 tiling_flags)
1137 struct amdgpu_device *adev = amdgpu_ttm_adev(bo->tbo.bdev);
1139 if (adev->family <= AMDGPU_FAMILY_CZ &&
1140 AMDGPU_TILING_GET(tiling_flags, TILE_SPLIT) > 6)
1143 bo->tiling_flags = tiling_flags;
1148 * amdgpu_bo_get_tiling_flags - get tiling flags
1149 * @bo: &amdgpu_bo buffer object
1150 * @tiling_flags: returned flags
1152 * Gets buffer object's tiling flags. Used by GEM ioctl or kernel driver to
1153 * set the tiling flags on a buffer.
1155 void amdgpu_bo_get_tiling_flags(struct amdgpu_bo *bo, u64 *tiling_flags)
1157 dma_resv_assert_held(bo->tbo.base.resv);
1160 *tiling_flags = bo->tiling_flags;
1164 * amdgpu_bo_set_metadata - set metadata
1165 * @bo: &amdgpu_bo buffer object
1166 * @metadata: new metadata
1167 * @metadata_size: size of the new metadata
1168 * @flags: flags of the new metadata
1170 * Sets buffer object's metadata, its size and flags.
1171 * Used via GEM ioctl.
1174 * 0 for success or a negative error code on failure.
1176 int amdgpu_bo_set_metadata (struct amdgpu_bo *bo, void *metadata,
1177 uint32_t metadata_size, uint64_t flags)
1181 if (!metadata_size) {
1182 if (bo->metadata_size) {
1183 kfree(bo->metadata);
1184 bo->metadata = NULL;
1185 bo->metadata_size = 0;
1190 if (metadata == NULL)
1193 buffer = kmemdup(metadata, metadata_size, GFP_KERNEL);
1197 kfree(bo->metadata);
1198 bo->metadata_flags = flags;
1199 bo->metadata = buffer;
1200 bo->metadata_size = metadata_size;
1206 * amdgpu_bo_get_metadata - get metadata
1207 * @bo: &amdgpu_bo buffer object
1208 * @buffer: returned metadata
1209 * @buffer_size: size of the buffer
1210 * @metadata_size: size of the returned metadata
1211 * @flags: flags of the returned metadata
1213 * Gets buffer object's metadata, its size and flags. buffer_size shall not be
1214 * less than metadata_size.
1215 * Used via GEM ioctl.
1218 * 0 for success or a negative error code on failure.
1220 int amdgpu_bo_get_metadata(struct amdgpu_bo *bo, void *buffer,
1221 size_t buffer_size, uint32_t *metadata_size,
1224 if (!buffer && !metadata_size)
1228 if (buffer_size < bo->metadata_size)
1231 if (bo->metadata_size)
1232 memcpy(buffer, bo->metadata, bo->metadata_size);
1236 *metadata_size = bo->metadata_size;
1238 *flags = bo->metadata_flags;
1244 * amdgpu_bo_move_notify - notification about a memory move
1245 * @bo: pointer to a buffer object
1246 * @evict: if this move is evicting the buffer from the graphics address space
1247 * @new_mem: new information of the bufer object
1249 * Marks the corresponding &amdgpu_bo buffer object as invalid, also performs
1251 * TTM driver callback which is called when ttm moves a buffer.
1253 void amdgpu_bo_move_notify(struct ttm_buffer_object *bo,
1255 struct ttm_resource *new_mem)
1257 struct amdgpu_device *adev = amdgpu_ttm_adev(bo->bdev);
1258 struct amdgpu_bo *abo;
1259 struct ttm_resource *old_mem = &bo->mem;
1261 if (!amdgpu_bo_is_amdgpu_bo(bo))
1264 abo = ttm_to_amdgpu_bo(bo);
1265 amdgpu_vm_bo_invalidate(adev, abo, evict);
1267 amdgpu_bo_kunmap(abo);
1269 if (abo->tbo.base.dma_buf && !abo->tbo.base.import_attach &&
1270 bo->mem.mem_type != TTM_PL_SYSTEM)
1271 dma_buf_move_notify(abo->tbo.base.dma_buf);
1273 /* remember the eviction */
1275 atomic64_inc(&adev->num_evictions);
1277 /* update statistics */
1281 /* move_notify is called before move happens */
1282 trace_amdgpu_bo_move(abo, new_mem->mem_type, old_mem->mem_type);
1286 * amdgpu_bo_release_notify - notification about a BO being released
1287 * @bo: pointer to a buffer object
1289 * Wipes VRAM buffers whose contents should not be leaked before the
1290 * memory is released.
1292 void amdgpu_bo_release_notify(struct ttm_buffer_object *bo)
1294 struct dma_fence *fence = NULL;
1295 struct amdgpu_bo *abo;
1298 if (!amdgpu_bo_is_amdgpu_bo(bo))
1301 abo = ttm_to_amdgpu_bo(bo);
1304 amdgpu_amdkfd_unreserve_memory_limit(abo);
1306 /* We only remove the fence if the resv has individualized. */
1307 WARN_ON_ONCE(bo->type == ttm_bo_type_kernel
1308 && bo->base.resv != &bo->base._resv);
1309 if (bo->base.resv == &bo->base._resv)
1310 amdgpu_amdkfd_remove_fence_on_pt_pd_bos(abo);
1312 if (bo->mem.mem_type != TTM_PL_VRAM || !bo->mem.mm_node ||
1313 !(abo->flags & AMDGPU_GEM_CREATE_VRAM_WIPE_ON_RELEASE))
1316 dma_resv_lock(bo->base.resv, NULL);
1318 r = amdgpu_fill_buffer(abo, AMDGPU_POISON, bo->base.resv, &fence);
1320 amdgpu_bo_fence(abo, fence, false);
1321 dma_fence_put(fence);
1324 dma_resv_unlock(bo->base.resv);
1328 * amdgpu_bo_fault_reserve_notify - notification about a memory fault
1329 * @bo: pointer to a buffer object
1331 * Notifies the driver we are taking a fault on this BO and have reserved it,
1332 * also performs bookkeeping.
1333 * TTM driver callback for dealing with vm faults.
1336 * 0 for success or a negative error code on failure.
1338 vm_fault_t amdgpu_bo_fault_reserve_notify(struct ttm_buffer_object *bo)
1340 struct amdgpu_device *adev = amdgpu_ttm_adev(bo->bdev);
1341 struct ttm_operation_ctx ctx = { false, false };
1342 struct amdgpu_bo *abo = ttm_to_amdgpu_bo(bo);
1343 unsigned long offset, size;
1346 /* Remember that this BO was accessed by the CPU */
1347 abo->flags |= AMDGPU_GEM_CREATE_CPU_ACCESS_REQUIRED;
1349 if (bo->mem.mem_type != TTM_PL_VRAM)
1352 size = bo->mem.num_pages << PAGE_SHIFT;
1353 offset = bo->mem.start << PAGE_SHIFT;
1354 if ((offset + size) <= adev->gmc.visible_vram_size)
1357 /* Can't move a pinned BO to visible VRAM */
1358 if (abo->tbo.pin_count > 0)
1359 return VM_FAULT_SIGBUS;
1361 /* hurrah the memory is not visible ! */
1362 atomic64_inc(&adev->num_vram_cpu_page_faults);
1363 amdgpu_bo_placement_from_domain(abo, AMDGPU_GEM_DOMAIN_VRAM |
1364 AMDGPU_GEM_DOMAIN_GTT);
1366 /* Avoid costly evictions; only set GTT as a busy placement */
1367 abo->placement.num_busy_placement = 1;
1368 abo->placement.busy_placement = &abo->placements[1];
1370 r = ttm_bo_validate(bo, &abo->placement, &ctx);
1371 if (unlikely(r == -EBUSY || r == -ERESTARTSYS))
1372 return VM_FAULT_NOPAGE;
1373 else if (unlikely(r))
1374 return VM_FAULT_SIGBUS;
1376 offset = bo->mem.start << PAGE_SHIFT;
1377 /* this should never happen */
1378 if (bo->mem.mem_type == TTM_PL_VRAM &&
1379 (offset + size) > adev->gmc.visible_vram_size)
1380 return VM_FAULT_SIGBUS;
1382 ttm_bo_move_to_lru_tail_unlocked(bo);
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_bo_sync_wait_resv - Wait for BO reservation fences
1408 * @adev: amdgpu device pointer
1409 * @resv: reservation object to sync to
1410 * @sync_mode: synchronization mode
1411 * @owner: fence owner
1412 * @intr: Whether the wait is interruptible
1414 * Extract the fences from the reservation object and waits for them to finish.
1417 * 0 on success, errno otherwise.
1419 int amdgpu_bo_sync_wait_resv(struct amdgpu_device *adev, struct dma_resv *resv,
1420 enum amdgpu_sync_mode sync_mode, void *owner,
1423 struct amdgpu_sync sync;
1426 amdgpu_sync_create(&sync);
1427 amdgpu_sync_resv(adev, &sync, resv, sync_mode, owner);
1428 r = amdgpu_sync_wait(&sync, intr);
1429 amdgpu_sync_free(&sync);
1434 * amdgpu_bo_sync_wait - Wrapper for amdgpu_bo_sync_wait_resv
1435 * @bo: buffer object to wait for
1436 * @owner: fence owner
1437 * @intr: Whether the wait is interruptible
1439 * Wrapper to wait for fences in a BO.
1441 * 0 on success, errno otherwise.
1443 int amdgpu_bo_sync_wait(struct amdgpu_bo *bo, void *owner, bool intr)
1445 struct amdgpu_device *adev = amdgpu_ttm_adev(bo->tbo.bdev);
1447 return amdgpu_bo_sync_wait_resv(adev, bo->tbo.base.resv,
1448 AMDGPU_SYNC_NE_OWNER, owner, intr);
1452 * amdgpu_bo_gpu_offset - return GPU offset of bo
1453 * @bo: amdgpu object for which we query the offset
1455 * Note: object should either be pinned or reserved when calling this
1456 * function, it might be useful to add check for this for debugging.
1459 * current GPU offset of the object.
1461 u64 amdgpu_bo_gpu_offset(struct amdgpu_bo *bo)
1463 WARN_ON_ONCE(bo->tbo.mem.mem_type == TTM_PL_SYSTEM);
1464 WARN_ON_ONCE(!dma_resv_is_locked(bo->tbo.base.resv) &&
1465 !bo->tbo.pin_count && bo->tbo.type != ttm_bo_type_kernel);
1466 WARN_ON_ONCE(bo->tbo.mem.start == AMDGPU_BO_INVALID_OFFSET);
1467 WARN_ON_ONCE(bo->tbo.mem.mem_type == TTM_PL_VRAM &&
1468 !(bo->flags & AMDGPU_GEM_CREATE_VRAM_CONTIGUOUS));
1470 return amdgpu_bo_gpu_offset_no_check(bo);
1474 * amdgpu_bo_gpu_offset_no_check - return GPU offset of bo
1475 * @bo: amdgpu object for which we query the offset
1478 * current GPU offset of the object without raising warnings.
1480 u64 amdgpu_bo_gpu_offset_no_check(struct amdgpu_bo *bo)
1482 struct amdgpu_device *adev = amdgpu_ttm_adev(bo->tbo.bdev);
1485 offset = (bo->tbo.mem.start << PAGE_SHIFT) +
1486 amdgpu_ttm_domain_start(adev, bo->tbo.mem.mem_type);
1488 return amdgpu_gmc_sign_extend(offset);
1492 * amdgpu_bo_get_preferred_pin_domain - get preferred domain for scanout
1493 * @adev: amdgpu device object
1494 * @domain: allowed :ref:`memory domains <amdgpu_memory_domains>`
1497 * Which of the allowed domains is preferred for pinning the BO for scanout.
1499 uint32_t amdgpu_bo_get_preferred_pin_domain(struct amdgpu_device *adev,
1502 if (domain == (AMDGPU_GEM_DOMAIN_VRAM | AMDGPU_GEM_DOMAIN_GTT)) {
1503 domain = AMDGPU_GEM_DOMAIN_VRAM;
1504 if (adev->gmc.real_vram_size <= AMDGPU_SG_THRESHOLD)
1505 domain = AMDGPU_GEM_DOMAIN_GTT;