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/drm_drv.h>
37 #include <drm/amdgpu_drm.h>
38 #include <drm/drm_cache.h>
40 #include "amdgpu_trace.h"
41 #include "amdgpu_amdkfd.h"
46 * This defines the interfaces to operate on an &amdgpu_bo buffer object which
47 * represents memory used by driver (VRAM, system memory, etc.). The driver
48 * provides DRM/GEM APIs to userspace. DRM/GEM APIs then use these interfaces
49 * to create/destroy/set buffer object which are then managed by the kernel TTM
51 * The interfaces are also used internally by kernel clients, including gfx,
52 * uvd, etc. for kernel managed allocations used by the GPU.
56 static void amdgpu_bo_destroy(struct ttm_buffer_object *tbo)
58 struct amdgpu_bo *bo = ttm_to_amdgpu_bo(tbo);
62 if (bo->tbo.base.import_attach)
63 drm_prime_gem_destroy(&bo->tbo.base, bo->tbo.sg);
64 drm_gem_object_release(&bo->tbo.base);
65 amdgpu_bo_unref(&bo->parent);
69 static void amdgpu_bo_user_destroy(struct ttm_buffer_object *tbo)
71 struct amdgpu_bo *bo = ttm_to_amdgpu_bo(tbo);
72 struct amdgpu_bo_user *ubo;
74 ubo = to_amdgpu_bo_user(bo);
76 amdgpu_bo_destroy(tbo);
79 static void amdgpu_bo_vm_destroy(struct ttm_buffer_object *tbo)
81 struct amdgpu_device *adev = amdgpu_ttm_adev(tbo->bdev);
82 struct amdgpu_bo *shadow_bo = ttm_to_amdgpu_bo(tbo), *bo;
83 struct amdgpu_bo_vm *vmbo;
85 bo = shadow_bo->parent;
86 vmbo = to_amdgpu_bo_vm(bo);
87 /* in case amdgpu_device_recover_vram got NULL of bo->parent */
88 if (!list_empty(&vmbo->shadow_list)) {
89 mutex_lock(&adev->shadow_list_lock);
90 list_del_init(&vmbo->shadow_list);
91 mutex_unlock(&adev->shadow_list_lock);
94 amdgpu_bo_destroy(tbo);
98 * amdgpu_bo_is_amdgpu_bo - check if the buffer object is an &amdgpu_bo
99 * @bo: buffer object to be checked
101 * Uses destroy function associated with the object to determine if this is
105 * true if the object belongs to &amdgpu_bo, false if not.
107 bool amdgpu_bo_is_amdgpu_bo(struct ttm_buffer_object *bo)
109 if (bo->destroy == &amdgpu_bo_destroy ||
110 bo->destroy == &amdgpu_bo_user_destroy ||
111 bo->destroy == &amdgpu_bo_vm_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 int visible_pfn = adev->gmc.visible_vram_size >> PAGE_SHIFT;
135 int8_t mem_id = KFD_XCP_MEM_ID(adev, abo->xcp_id);
137 if (adev->gmc.mem_partitions && mem_id >= 0) {
138 places[c].fpfn = adev->gmc.mem_partitions[mem_id].range.fpfn;
140 * memory partition range lpfn is inclusive start + size - 1
141 * TTM place lpfn is exclusive start + size
143 places[c].lpfn = adev->gmc.mem_partitions[mem_id].range.lpfn + 1;
148 places[c].mem_type = TTM_PL_VRAM;
151 if (flags & AMDGPU_GEM_CREATE_CPU_ACCESS_REQUIRED)
152 places[c].lpfn = min_not_zero(places[c].lpfn, visible_pfn);
154 places[c].flags |= TTM_PL_FLAG_TOPDOWN;
156 if (flags & AMDGPU_GEM_CREATE_VRAM_CONTIGUOUS)
157 places[c].flags |= TTM_PL_FLAG_CONTIGUOUS;
161 if (domain & AMDGPU_GEM_DOMAIN_DOORBELL) {
164 places[c].mem_type = AMDGPU_PL_DOORBELL;
169 if (domain & AMDGPU_GEM_DOMAIN_GTT) {
173 abo->flags & AMDGPU_GEM_CREATE_PREEMPTIBLE ?
174 AMDGPU_PL_PREEMPT : TTM_PL_TT;
179 if (domain & AMDGPU_GEM_DOMAIN_CPU) {
182 places[c].mem_type = TTM_PL_SYSTEM;
187 if (domain & AMDGPU_GEM_DOMAIN_GDS) {
190 places[c].mem_type = AMDGPU_PL_GDS;
195 if (domain & AMDGPU_GEM_DOMAIN_GWS) {
198 places[c].mem_type = AMDGPU_PL_GWS;
203 if (domain & AMDGPU_GEM_DOMAIN_OA) {
206 places[c].mem_type = AMDGPU_PL_OA;
214 places[c].mem_type = TTM_PL_SYSTEM;
219 BUG_ON(c > AMDGPU_BO_MAX_PLACEMENTS);
221 placement->num_placement = c;
222 placement->placement = places;
224 placement->num_busy_placement = c;
225 placement->busy_placement = places;
229 * amdgpu_bo_create_reserved - create reserved BO for kernel use
231 * @adev: amdgpu device object
232 * @size: size for the new BO
233 * @align: alignment for the new BO
234 * @domain: where to place it
235 * @bo_ptr: used to initialize BOs in structures
236 * @gpu_addr: GPU addr of the pinned BO
237 * @cpu_addr: optional CPU address mapping
239 * Allocates and pins a BO for kernel internal use, and returns it still
242 * Note: For bo_ptr new BO is only created if bo_ptr points to NULL.
245 * 0 on success, negative error code otherwise.
247 int amdgpu_bo_create_reserved(struct amdgpu_device *adev,
248 unsigned long size, int align,
249 u32 domain, struct amdgpu_bo **bo_ptr,
250 u64 *gpu_addr, void **cpu_addr)
252 struct amdgpu_bo_param bp;
257 amdgpu_bo_unref(bo_ptr);
261 memset(&bp, 0, sizeof(bp));
263 bp.byte_align = align;
265 bp.flags = cpu_addr ? AMDGPU_GEM_CREATE_CPU_ACCESS_REQUIRED
266 : AMDGPU_GEM_CREATE_NO_CPU_ACCESS;
267 bp.flags |= AMDGPU_GEM_CREATE_VRAM_CONTIGUOUS;
268 bp.type = ttm_bo_type_kernel;
270 bp.bo_ptr_size = sizeof(struct amdgpu_bo);
273 r = amdgpu_bo_create(adev, &bp, bo_ptr);
275 dev_err(adev->dev, "(%d) failed to allocate kernel bo\n",
282 r = amdgpu_bo_reserve(*bo_ptr, false);
284 dev_err(adev->dev, "(%d) failed to reserve kernel bo\n", r);
288 r = amdgpu_bo_pin(*bo_ptr, domain);
290 dev_err(adev->dev, "(%d) kernel bo pin failed\n", r);
291 goto error_unreserve;
294 r = amdgpu_ttm_alloc_gart(&(*bo_ptr)->tbo);
296 dev_err(adev->dev, "%p bind failed\n", *bo_ptr);
301 *gpu_addr = amdgpu_bo_gpu_offset(*bo_ptr);
304 r = amdgpu_bo_kmap(*bo_ptr, cpu_addr);
306 dev_err(adev->dev, "(%d) kernel bo map failed\n", r);
314 amdgpu_bo_unpin(*bo_ptr);
316 amdgpu_bo_unreserve(*bo_ptr);
320 amdgpu_bo_unref(bo_ptr);
326 * amdgpu_bo_create_kernel - create BO for kernel use
328 * @adev: amdgpu device object
329 * @size: size for the new BO
330 * @align: alignment for the new BO
331 * @domain: where to place it
332 * @bo_ptr: used to initialize BOs in structures
333 * @gpu_addr: GPU addr of the pinned BO
334 * @cpu_addr: optional CPU address mapping
336 * Allocates and pins a BO for kernel internal use.
338 * Note: For bo_ptr new BO is only created if bo_ptr points to NULL.
341 * 0 on success, negative error code otherwise.
343 int amdgpu_bo_create_kernel(struct amdgpu_device *adev,
344 unsigned long size, int align,
345 u32 domain, struct amdgpu_bo **bo_ptr,
346 u64 *gpu_addr, void **cpu_addr)
350 r = amdgpu_bo_create_reserved(adev, size, align, domain, bo_ptr,
357 amdgpu_bo_unreserve(*bo_ptr);
363 * amdgpu_bo_create_kernel_at - create BO for kernel use at specific location
365 * @adev: amdgpu device object
366 * @offset: offset of the BO
367 * @size: size of the BO
368 * @bo_ptr: used to initialize BOs in structures
369 * @cpu_addr: optional CPU address mapping
371 * Creates a kernel BO at a specific offset in VRAM.
374 * 0 on success, negative error code otherwise.
376 int amdgpu_bo_create_kernel_at(struct amdgpu_device *adev,
377 uint64_t offset, uint64_t size,
378 struct amdgpu_bo **bo_ptr, void **cpu_addr)
380 struct ttm_operation_ctx ctx = { false, false };
385 size = ALIGN(size, PAGE_SIZE);
387 r = amdgpu_bo_create_reserved(adev, size, PAGE_SIZE,
388 AMDGPU_GEM_DOMAIN_VRAM, bo_ptr, NULL,
393 if ((*bo_ptr) == NULL)
397 * Remove the original mem node and create a new one at the request
401 amdgpu_bo_kunmap(*bo_ptr);
403 ttm_resource_free(&(*bo_ptr)->tbo, &(*bo_ptr)->tbo.resource);
405 for (i = 0; i < (*bo_ptr)->placement.num_placement; ++i) {
406 (*bo_ptr)->placements[i].fpfn = offset >> PAGE_SHIFT;
407 (*bo_ptr)->placements[i].lpfn = (offset + size) >> PAGE_SHIFT;
409 r = ttm_bo_mem_space(&(*bo_ptr)->tbo, &(*bo_ptr)->placement,
410 &(*bo_ptr)->tbo.resource, &ctx);
415 r = amdgpu_bo_kmap(*bo_ptr, cpu_addr);
420 amdgpu_bo_unreserve(*bo_ptr);
424 amdgpu_bo_unreserve(*bo_ptr);
425 amdgpu_bo_unref(bo_ptr);
430 * amdgpu_bo_free_kernel - free BO for kernel use
432 * @bo: amdgpu BO to free
433 * @gpu_addr: pointer to where the BO's GPU memory space address was stored
434 * @cpu_addr: pointer to where the BO's CPU memory space address was stored
436 * unmaps and unpin a BO for kernel internal use.
438 void amdgpu_bo_free_kernel(struct amdgpu_bo **bo, u64 *gpu_addr,
444 WARN_ON(amdgpu_ttm_adev((*bo)->tbo.bdev)->in_suspend);
446 if (likely(amdgpu_bo_reserve(*bo, true) == 0)) {
448 amdgpu_bo_kunmap(*bo);
450 amdgpu_bo_unpin(*bo);
451 amdgpu_bo_unreserve(*bo);
462 /* Validate bo size is bit bigger than the request domain */
463 static bool amdgpu_bo_validate_size(struct amdgpu_device *adev,
464 unsigned long size, u32 domain)
466 struct ttm_resource_manager *man = NULL;
469 * If GTT is part of requested domains the check must succeed to
470 * allow fall back to GTT.
472 if (domain & AMDGPU_GEM_DOMAIN_GTT)
473 man = ttm_manager_type(&adev->mman.bdev, TTM_PL_TT);
474 else if (domain & AMDGPU_GEM_DOMAIN_VRAM)
475 man = ttm_manager_type(&adev->mman.bdev, TTM_PL_VRAM);
480 if (domain & AMDGPU_GEM_DOMAIN_GTT)
481 WARN_ON_ONCE("GTT domain requested but GTT mem manager uninitialized");
485 /* TODO add more domains checks, such as AMDGPU_GEM_DOMAIN_CPU, _DOMAIN_DOORBELL */
486 if (size < man->size)
489 DRM_DEBUG("BO size %lu > total memory in domain: %llu\n", size, man->size);
493 bool amdgpu_bo_support_uswc(u64 bo_flags)
497 /* XXX: Write-combined CPU mappings of GTT seem broken on 32-bit
498 * See https://bugs.freedesktop.org/show_bug.cgi?id=84627
501 #elif defined(CONFIG_X86) && !defined(CONFIG_X86_PAT)
502 /* Don't try to enable write-combining when it can't work, or things
504 * See https://bugs.freedesktop.org/show_bug.cgi?id=88758
507 #ifndef CONFIG_COMPILE_TEST
508 #warning Please enable CONFIG_MTRR and CONFIG_X86_PAT for better performance \
509 thanks to write-combining
512 if (bo_flags & AMDGPU_GEM_CREATE_CPU_GTT_USWC)
513 DRM_INFO_ONCE("Please enable CONFIG_MTRR and CONFIG_X86_PAT for "
514 "better performance thanks to write-combining\n");
517 /* For architectures that don't support WC memory,
518 * mask out the WC flag from the BO
520 if (!drm_arch_can_wc_memory())
528 * amdgpu_bo_create - create an &amdgpu_bo buffer object
529 * @adev: amdgpu device object
530 * @bp: parameters to be used for the buffer object
531 * @bo_ptr: pointer to the buffer object pointer
533 * Creates an &amdgpu_bo buffer object.
536 * 0 for success or a negative error code on failure.
538 int amdgpu_bo_create(struct amdgpu_device *adev,
539 struct amdgpu_bo_param *bp,
540 struct amdgpu_bo **bo_ptr)
542 struct ttm_operation_ctx ctx = {
543 .interruptible = (bp->type != ttm_bo_type_kernel),
544 .no_wait_gpu = bp->no_wait_gpu,
545 /* We opt to avoid OOM on system pages allocations */
546 .gfp_retry_mayfail = true,
547 .allow_res_evict = bp->type != ttm_bo_type_kernel,
550 struct amdgpu_bo *bo;
551 unsigned long page_align, size = bp->size;
554 /* Note that GDS/GWS/OA allocates 1 page per byte/resource. */
555 if (bp->domain & (AMDGPU_GEM_DOMAIN_GWS | AMDGPU_GEM_DOMAIN_OA)) {
556 /* GWS and OA don't need any alignment. */
557 page_align = bp->byte_align;
560 } else if (bp->domain & AMDGPU_GEM_DOMAIN_GDS) {
561 /* Both size and alignment must be a multiple of 4. */
562 page_align = ALIGN(bp->byte_align, 4);
563 size = ALIGN(size, 4) << PAGE_SHIFT;
565 /* Memory should be aligned at least to a page size. */
566 page_align = ALIGN(bp->byte_align, PAGE_SIZE) >> PAGE_SHIFT;
567 size = ALIGN(size, PAGE_SIZE);
570 if (!amdgpu_bo_validate_size(adev, size, bp->domain))
573 BUG_ON(bp->bo_ptr_size < sizeof(struct amdgpu_bo));
576 bo = kvzalloc(bp->bo_ptr_size, GFP_KERNEL);
579 drm_gem_private_object_init(adev_to_drm(adev), &bo->tbo.base, size);
581 bo->preferred_domains = bp->preferred_domain ? bp->preferred_domain :
583 bo->allowed_domains = bo->preferred_domains;
584 if (bp->type != ttm_bo_type_kernel &&
585 !(bp->flags & AMDGPU_GEM_CREATE_DISCARDABLE) &&
586 bo->allowed_domains == AMDGPU_GEM_DOMAIN_VRAM)
587 bo->allowed_domains |= AMDGPU_GEM_DOMAIN_GTT;
589 bo->flags = bp->flags;
591 if (adev->gmc.mem_partitions)
592 /* For GPUs with spatial partitioning, bo->xcp_id=-1 means any partition */
593 bo->xcp_id = bp->xcp_id_plus1 - 1;
595 /* For GPUs without spatial partitioning */
598 if (!amdgpu_bo_support_uswc(bo->flags))
599 bo->flags &= ~AMDGPU_GEM_CREATE_CPU_GTT_USWC;
601 if (adev->ras_enabled)
602 bo->flags |= AMDGPU_GEM_CREATE_VRAM_WIPE_ON_RELEASE;
604 bo->tbo.bdev = &adev->mman.bdev;
605 if (bp->domain & (AMDGPU_GEM_DOMAIN_GWS | AMDGPU_GEM_DOMAIN_OA |
606 AMDGPU_GEM_DOMAIN_GDS))
607 amdgpu_bo_placement_from_domain(bo, AMDGPU_GEM_DOMAIN_CPU);
609 amdgpu_bo_placement_from_domain(bo, bp->domain);
610 if (bp->type == ttm_bo_type_kernel)
611 bo->tbo.priority = 1;
614 bp->destroy = &amdgpu_bo_destroy;
616 r = ttm_bo_init_reserved(&adev->mman.bdev, &bo->tbo, bp->type,
617 &bo->placement, page_align, &ctx, NULL,
618 bp->resv, bp->destroy);
619 if (unlikely(r != 0))
622 if (!amdgpu_gmc_vram_full_visible(&adev->gmc) &&
623 bo->tbo.resource->mem_type == TTM_PL_VRAM &&
624 amdgpu_bo_in_cpu_visible_vram(bo))
625 amdgpu_cs_report_moved_bytes(adev, ctx.bytes_moved,
628 amdgpu_cs_report_moved_bytes(adev, ctx.bytes_moved, 0);
630 if (bp->flags & AMDGPU_GEM_CREATE_VRAM_CLEARED &&
631 bo->tbo.resource->mem_type == TTM_PL_VRAM) {
632 struct dma_fence *fence;
634 r = amdgpu_fill_buffer(bo, 0, bo->tbo.base.resv, &fence, true);
638 dma_resv_add_fence(bo->tbo.base.resv, fence,
639 DMA_RESV_USAGE_KERNEL);
640 dma_fence_put(fence);
643 amdgpu_bo_unreserve(bo);
646 trace_amdgpu_bo_create(bo);
648 /* Treat CPU_ACCESS_REQUIRED only as a hint if given by UMD */
649 if (bp->type == ttm_bo_type_device)
650 bo->flags &= ~AMDGPU_GEM_CREATE_CPU_ACCESS_REQUIRED;
656 dma_resv_unlock(bo->tbo.base.resv);
657 amdgpu_bo_unref(&bo);
662 * amdgpu_bo_create_user - create an &amdgpu_bo_user buffer object
663 * @adev: amdgpu device object
664 * @bp: parameters to be used for the buffer object
665 * @ubo_ptr: pointer to the buffer object pointer
667 * Create a BO to be used by user application;
670 * 0 for success or a negative error code on failure.
673 int amdgpu_bo_create_user(struct amdgpu_device *adev,
674 struct amdgpu_bo_param *bp,
675 struct amdgpu_bo_user **ubo_ptr)
677 struct amdgpu_bo *bo_ptr;
680 bp->bo_ptr_size = sizeof(struct amdgpu_bo_user);
681 bp->destroy = &amdgpu_bo_user_destroy;
682 r = amdgpu_bo_create(adev, bp, &bo_ptr);
686 *ubo_ptr = to_amdgpu_bo_user(bo_ptr);
691 * amdgpu_bo_create_vm - create an &amdgpu_bo_vm buffer object
692 * @adev: amdgpu device object
693 * @bp: parameters to be used for the buffer object
694 * @vmbo_ptr: pointer to the buffer object pointer
696 * Create a BO to be for GPUVM.
699 * 0 for success or a negative error code on failure.
702 int amdgpu_bo_create_vm(struct amdgpu_device *adev,
703 struct amdgpu_bo_param *bp,
704 struct amdgpu_bo_vm **vmbo_ptr)
706 struct amdgpu_bo *bo_ptr;
709 /* bo_ptr_size will be determined by the caller and it depends on
710 * num of amdgpu_vm_pt entries.
712 BUG_ON(bp->bo_ptr_size < sizeof(struct amdgpu_bo_vm));
713 r = amdgpu_bo_create(adev, bp, &bo_ptr);
717 *vmbo_ptr = to_amdgpu_bo_vm(bo_ptr);
722 * amdgpu_bo_add_to_shadow_list - add a BO to the shadow list
724 * @vmbo: BO that will be inserted into the shadow list
726 * Insert a BO to the shadow list.
728 void amdgpu_bo_add_to_shadow_list(struct amdgpu_bo_vm *vmbo)
730 struct amdgpu_device *adev = amdgpu_ttm_adev(vmbo->bo.tbo.bdev);
732 mutex_lock(&adev->shadow_list_lock);
733 list_add_tail(&vmbo->shadow_list, &adev->shadow_list);
734 vmbo->shadow->parent = amdgpu_bo_ref(&vmbo->bo);
735 vmbo->shadow->tbo.destroy = &amdgpu_bo_vm_destroy;
736 mutex_unlock(&adev->shadow_list_lock);
740 * amdgpu_bo_restore_shadow - restore an &amdgpu_bo shadow
742 * @shadow: &amdgpu_bo shadow to be restored
743 * @fence: dma_fence associated with the operation
745 * Copies a buffer object's shadow content back to the object.
746 * This is used for recovering a buffer from its shadow in case of a gpu
747 * reset where vram context may be lost.
750 * 0 for success or a negative error code on failure.
752 int amdgpu_bo_restore_shadow(struct amdgpu_bo *shadow, struct dma_fence **fence)
755 struct amdgpu_device *adev = amdgpu_ttm_adev(shadow->tbo.bdev);
756 struct amdgpu_ring *ring = adev->mman.buffer_funcs_ring;
757 uint64_t shadow_addr, parent_addr;
759 shadow_addr = amdgpu_bo_gpu_offset(shadow);
760 parent_addr = amdgpu_bo_gpu_offset(shadow->parent);
762 return amdgpu_copy_buffer(ring, shadow_addr, parent_addr,
763 amdgpu_bo_size(shadow), NULL, fence,
768 * amdgpu_bo_kmap - map an &amdgpu_bo buffer object
769 * @bo: &amdgpu_bo buffer object to be mapped
770 * @ptr: kernel virtual address to be returned
772 * Calls ttm_bo_kmap() to set up the kernel virtual mapping; calls
773 * amdgpu_bo_kptr() to get the kernel virtual address.
776 * 0 for success or a negative error code on failure.
778 int amdgpu_bo_kmap(struct amdgpu_bo *bo, void **ptr)
783 if (bo->flags & AMDGPU_GEM_CREATE_NO_CPU_ACCESS)
786 r = dma_resv_wait_timeout(bo->tbo.base.resv, DMA_RESV_USAGE_KERNEL,
787 false, MAX_SCHEDULE_TIMEOUT);
791 kptr = amdgpu_bo_kptr(bo);
798 r = ttm_bo_kmap(&bo->tbo, 0, PFN_UP(bo->tbo.base.size), &bo->kmap);
803 *ptr = amdgpu_bo_kptr(bo);
809 * amdgpu_bo_kptr - returns a kernel virtual address of the buffer object
810 * @bo: &amdgpu_bo buffer object
812 * Calls ttm_kmap_obj_virtual() to get the kernel virtual address
815 * the virtual address of a buffer object area.
817 void *amdgpu_bo_kptr(struct amdgpu_bo *bo)
821 return ttm_kmap_obj_virtual(&bo->kmap, &is_iomem);
825 * amdgpu_bo_kunmap - unmap an &amdgpu_bo buffer object
826 * @bo: &amdgpu_bo buffer object to be unmapped
828 * Unmaps a kernel map set up by amdgpu_bo_kmap().
830 void amdgpu_bo_kunmap(struct amdgpu_bo *bo)
833 ttm_bo_kunmap(&bo->kmap);
837 * amdgpu_bo_ref - reference an &amdgpu_bo buffer object
838 * @bo: &amdgpu_bo buffer object
840 * References the contained &ttm_buffer_object.
843 * a refcounted pointer to the &amdgpu_bo buffer object.
845 struct amdgpu_bo *amdgpu_bo_ref(struct amdgpu_bo *bo)
850 ttm_bo_get(&bo->tbo);
855 * amdgpu_bo_unref - unreference an &amdgpu_bo buffer object
856 * @bo: &amdgpu_bo buffer object
858 * Unreferences the contained &ttm_buffer_object and clear the pointer
860 void amdgpu_bo_unref(struct amdgpu_bo **bo)
862 struct ttm_buffer_object *tbo;
873 * amdgpu_bo_pin_restricted - pin an &amdgpu_bo buffer object
874 * @bo: &amdgpu_bo buffer object to be pinned
875 * @domain: domain to be pinned to
876 * @min_offset: the start of requested address range
877 * @max_offset: the end of requested address range
879 * Pins the buffer object according to requested domain and address range. If
880 * the memory is unbound gart memory, binds the pages into gart table. Adjusts
881 * pin_count and pin_size accordingly.
883 * Pinning means to lock pages in memory along with keeping them at a fixed
884 * offset. It is required when a buffer can not be moved, for example, when
885 * a display buffer is being scanned out.
887 * Compared with amdgpu_bo_pin(), this function gives more flexibility on
888 * where to pin a buffer if there are specific restrictions on where a buffer
892 * 0 for success or a negative error code on failure.
894 int amdgpu_bo_pin_restricted(struct amdgpu_bo *bo, u32 domain,
895 u64 min_offset, u64 max_offset)
897 struct amdgpu_device *adev = amdgpu_ttm_adev(bo->tbo.bdev);
898 struct ttm_operation_ctx ctx = { false, false };
901 if (amdgpu_ttm_tt_get_usermm(bo->tbo.ttm))
904 if (WARN_ON_ONCE(min_offset > max_offset))
907 /* Check domain to be pinned to against preferred domains */
908 if (bo->preferred_domains & domain)
909 domain = bo->preferred_domains & domain;
911 /* A shared bo cannot be migrated to VRAM */
912 if (bo->tbo.base.import_attach) {
913 if (domain & AMDGPU_GEM_DOMAIN_GTT)
914 domain = AMDGPU_GEM_DOMAIN_GTT;
919 if (bo->tbo.pin_count) {
920 uint32_t mem_type = bo->tbo.resource->mem_type;
921 uint32_t mem_flags = bo->tbo.resource->placement;
923 if (!(domain & amdgpu_mem_type_to_domain(mem_type)))
926 if ((mem_type == TTM_PL_VRAM) &&
927 (bo->flags & AMDGPU_GEM_CREATE_VRAM_CONTIGUOUS) &&
928 !(mem_flags & TTM_PL_FLAG_CONTIGUOUS))
931 ttm_bo_pin(&bo->tbo);
933 if (max_offset != 0) {
934 u64 domain_start = amdgpu_ttm_domain_start(adev,
936 WARN_ON_ONCE(max_offset <
937 (amdgpu_bo_gpu_offset(bo) - domain_start));
943 /* This assumes only APU display buffers are pinned with (VRAM|GTT).
944 * See function amdgpu_display_supported_domains()
946 domain = amdgpu_bo_get_preferred_domain(adev, domain);
948 if (bo->tbo.base.import_attach)
949 dma_buf_pin(bo->tbo.base.import_attach);
951 /* force to pin into visible video ram */
952 if (!(bo->flags & AMDGPU_GEM_CREATE_NO_CPU_ACCESS))
953 bo->flags |= AMDGPU_GEM_CREATE_CPU_ACCESS_REQUIRED;
954 amdgpu_bo_placement_from_domain(bo, domain);
955 for (i = 0; i < bo->placement.num_placement; i++) {
956 unsigned int fpfn, lpfn;
958 fpfn = min_offset >> PAGE_SHIFT;
959 lpfn = max_offset >> PAGE_SHIFT;
961 if (fpfn > bo->placements[i].fpfn)
962 bo->placements[i].fpfn = fpfn;
963 if (!bo->placements[i].lpfn ||
964 (lpfn && lpfn < bo->placements[i].lpfn))
965 bo->placements[i].lpfn = lpfn;
968 r = ttm_bo_validate(&bo->tbo, &bo->placement, &ctx);
970 dev_err(adev->dev, "%p pin failed\n", bo);
974 ttm_bo_pin(&bo->tbo);
976 domain = amdgpu_mem_type_to_domain(bo->tbo.resource->mem_type);
977 if (domain == AMDGPU_GEM_DOMAIN_VRAM) {
978 atomic64_add(amdgpu_bo_size(bo), &adev->vram_pin_size);
979 atomic64_add(amdgpu_vram_mgr_bo_visible_size(bo),
980 &adev->visible_pin_size);
981 } else if (domain == AMDGPU_GEM_DOMAIN_GTT) {
982 atomic64_add(amdgpu_bo_size(bo), &adev->gart_pin_size);
990 * amdgpu_bo_pin - pin an &amdgpu_bo buffer object
991 * @bo: &amdgpu_bo buffer object to be pinned
992 * @domain: domain to be pinned to
994 * A simple wrapper to amdgpu_bo_pin_restricted().
995 * Provides a simpler API for buffers that do not have any strict restrictions
996 * on where a buffer must be located.
999 * 0 for success or a negative error code on failure.
1001 int amdgpu_bo_pin(struct amdgpu_bo *bo, u32 domain)
1003 bo->flags |= AMDGPU_GEM_CREATE_VRAM_CONTIGUOUS;
1004 return amdgpu_bo_pin_restricted(bo, domain, 0, 0);
1008 * amdgpu_bo_unpin - unpin an &amdgpu_bo buffer object
1009 * @bo: &amdgpu_bo buffer object to be unpinned
1011 * Decreases the pin_count, and clears the flags if pin_count reaches 0.
1012 * Changes placement and pin size accordingly.
1015 * 0 for success or a negative error code on failure.
1017 void amdgpu_bo_unpin(struct amdgpu_bo *bo)
1019 struct amdgpu_device *adev = amdgpu_ttm_adev(bo->tbo.bdev);
1021 ttm_bo_unpin(&bo->tbo);
1022 if (bo->tbo.pin_count)
1025 if (bo->tbo.base.import_attach)
1026 dma_buf_unpin(bo->tbo.base.import_attach);
1028 if (bo->tbo.resource->mem_type == TTM_PL_VRAM) {
1029 atomic64_sub(amdgpu_bo_size(bo), &adev->vram_pin_size);
1030 atomic64_sub(amdgpu_vram_mgr_bo_visible_size(bo),
1031 &adev->visible_pin_size);
1032 } else if (bo->tbo.resource->mem_type == TTM_PL_TT) {
1033 atomic64_sub(amdgpu_bo_size(bo), &adev->gart_pin_size);
1038 static const char * const amdgpu_vram_names[] = {
1055 * amdgpu_bo_init - initialize memory manager
1056 * @adev: amdgpu device object
1058 * Calls amdgpu_ttm_init() to initialize amdgpu memory manager.
1061 * 0 for success or a negative error code on failure.
1063 int amdgpu_bo_init(struct amdgpu_device *adev)
1065 /* set the default AGP aperture state */
1066 amdgpu_gmc_set_agp_default(adev, &adev->gmc);
1068 /* On A+A platform, VRAM can be mapped as WB */
1069 if (!adev->gmc.xgmi.connected_to_cpu && !adev->gmc.is_app_apu) {
1070 /* reserve PAT memory space to WC for VRAM */
1071 int r = arch_io_reserve_memtype_wc(adev->gmc.aper_base,
1072 adev->gmc.aper_size);
1075 DRM_ERROR("Unable to set WC memtype for the aperture base\n");
1079 /* Add an MTRR for the VRAM */
1080 adev->gmc.vram_mtrr = arch_phys_wc_add(adev->gmc.aper_base,
1081 adev->gmc.aper_size);
1084 DRM_INFO("Detected VRAM RAM=%lluM, BAR=%lluM\n",
1085 adev->gmc.mc_vram_size >> 20,
1086 (unsigned long long)adev->gmc.aper_size >> 20);
1087 DRM_INFO("RAM width %dbits %s\n",
1088 adev->gmc.vram_width, amdgpu_vram_names[adev->gmc.vram_type]);
1089 return amdgpu_ttm_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)
1102 amdgpu_ttm_fini(adev);
1104 if (drm_dev_enter(adev_to_drm(adev), &idx)) {
1105 if (!adev->gmc.xgmi.connected_to_cpu && !adev->gmc.is_app_apu) {
1106 arch_phys_wc_del(adev->gmc.vram_mtrr);
1107 arch_io_free_memtype_wc(adev->gmc.aper_base, adev->gmc.aper_size);
1114 * amdgpu_bo_set_tiling_flags - set tiling flags
1115 * @bo: &amdgpu_bo buffer object
1116 * @tiling_flags: new flags
1118 * Sets buffer object's tiling flags with the new one. Used by GEM ioctl or
1119 * kernel driver to set the tiling flags on a buffer.
1122 * 0 for success or a negative error code on failure.
1124 int amdgpu_bo_set_tiling_flags(struct amdgpu_bo *bo, u64 tiling_flags)
1126 struct amdgpu_device *adev = amdgpu_ttm_adev(bo->tbo.bdev);
1127 struct amdgpu_bo_user *ubo;
1129 BUG_ON(bo->tbo.type == ttm_bo_type_kernel);
1130 if (adev->family <= AMDGPU_FAMILY_CZ &&
1131 AMDGPU_TILING_GET(tiling_flags, TILE_SPLIT) > 6)
1134 ubo = to_amdgpu_bo_user(bo);
1135 ubo->tiling_flags = tiling_flags;
1140 * amdgpu_bo_get_tiling_flags - get tiling flags
1141 * @bo: &amdgpu_bo buffer object
1142 * @tiling_flags: returned flags
1144 * Gets buffer object's tiling flags. Used by GEM ioctl or kernel driver to
1145 * set the tiling flags on a buffer.
1147 void amdgpu_bo_get_tiling_flags(struct amdgpu_bo *bo, u64 *tiling_flags)
1149 struct amdgpu_bo_user *ubo;
1151 BUG_ON(bo->tbo.type == ttm_bo_type_kernel);
1152 dma_resv_assert_held(bo->tbo.base.resv);
1153 ubo = to_amdgpu_bo_user(bo);
1156 *tiling_flags = ubo->tiling_flags;
1160 * amdgpu_bo_set_metadata - set metadata
1161 * @bo: &amdgpu_bo buffer object
1162 * @metadata: new metadata
1163 * @metadata_size: size of the new metadata
1164 * @flags: flags of the new metadata
1166 * Sets buffer object's metadata, its size and flags.
1167 * Used via GEM ioctl.
1170 * 0 for success or a negative error code on failure.
1172 int amdgpu_bo_set_metadata(struct amdgpu_bo *bo, void *metadata,
1173 u32 metadata_size, uint64_t flags)
1175 struct amdgpu_bo_user *ubo;
1178 BUG_ON(bo->tbo.type == ttm_bo_type_kernel);
1179 ubo = to_amdgpu_bo_user(bo);
1180 if (!metadata_size) {
1181 if (ubo->metadata_size) {
1182 kfree(ubo->metadata);
1183 ubo->metadata = NULL;
1184 ubo->metadata_size = 0;
1189 if (metadata == NULL)
1192 buffer = kmemdup(metadata, metadata_size, GFP_KERNEL);
1196 kfree(ubo->metadata);
1197 ubo->metadata_flags = flags;
1198 ubo->metadata = buffer;
1199 ubo->metadata_size = metadata_size;
1205 * amdgpu_bo_get_metadata - get metadata
1206 * @bo: &amdgpu_bo buffer object
1207 * @buffer: returned metadata
1208 * @buffer_size: size of the buffer
1209 * @metadata_size: size of the returned metadata
1210 * @flags: flags of the returned metadata
1212 * Gets buffer object's metadata, its size and flags. buffer_size shall not be
1213 * less than metadata_size.
1214 * Used via GEM ioctl.
1217 * 0 for success or a negative error code on failure.
1219 int amdgpu_bo_get_metadata(struct amdgpu_bo *bo, void *buffer,
1220 size_t buffer_size, uint32_t *metadata_size,
1223 struct amdgpu_bo_user *ubo;
1225 if (!buffer && !metadata_size)
1228 BUG_ON(bo->tbo.type == ttm_bo_type_kernel);
1229 ubo = to_amdgpu_bo_user(bo);
1231 *metadata_size = ubo->metadata_size;
1234 if (buffer_size < ubo->metadata_size)
1237 if (ubo->metadata_size)
1238 memcpy(buffer, ubo->metadata, ubo->metadata_size);
1242 *flags = ubo->metadata_flags;
1248 * amdgpu_bo_move_notify - notification about a memory move
1249 * @bo: pointer to a buffer object
1250 * @evict: if this move is evicting the buffer from the graphics address space
1251 * @new_mem: new information of the bufer object
1253 * Marks the corresponding &amdgpu_bo buffer object as invalid, also performs
1255 * TTM driver callback which is called when ttm moves a buffer.
1257 void amdgpu_bo_move_notify(struct ttm_buffer_object *bo,
1259 struct ttm_resource *new_mem)
1261 struct amdgpu_device *adev = amdgpu_ttm_adev(bo->bdev);
1262 struct amdgpu_bo *abo;
1263 struct ttm_resource *old_mem = bo->resource;
1265 if (!amdgpu_bo_is_amdgpu_bo(bo))
1268 abo = ttm_to_amdgpu_bo(bo);
1269 amdgpu_vm_bo_invalidate(adev, abo, evict);
1271 amdgpu_bo_kunmap(abo);
1273 if (abo->tbo.base.dma_buf && !abo->tbo.base.import_attach &&
1274 bo->resource->mem_type != TTM_PL_SYSTEM)
1275 dma_buf_move_notify(abo->tbo.base.dma_buf);
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);
1289 void amdgpu_bo_get_memory(struct amdgpu_bo *bo,
1290 struct amdgpu_mem_stats *stats)
1292 uint64_t size = amdgpu_bo_size(bo);
1293 unsigned int domain;
1295 /* Abort if the BO doesn't currently have a backing store */
1296 if (!bo->tbo.resource)
1299 domain = amdgpu_mem_type_to_domain(bo->tbo.resource->mem_type);
1301 case AMDGPU_GEM_DOMAIN_VRAM:
1302 stats->vram += size;
1303 if (amdgpu_bo_in_cpu_visible_vram(bo))
1304 stats->visible_vram += size;
1306 case AMDGPU_GEM_DOMAIN_GTT:
1309 case AMDGPU_GEM_DOMAIN_CPU:
1315 if (bo->preferred_domains & AMDGPU_GEM_DOMAIN_VRAM) {
1316 stats->requested_vram += size;
1317 if (bo->flags & AMDGPU_GEM_CREATE_CPU_ACCESS_REQUIRED)
1318 stats->requested_visible_vram += size;
1320 if (domain != AMDGPU_GEM_DOMAIN_VRAM) {
1321 stats->evicted_vram += size;
1322 if (bo->flags & AMDGPU_GEM_CREATE_CPU_ACCESS_REQUIRED)
1323 stats->evicted_visible_vram += size;
1325 } else if (bo->preferred_domains & AMDGPU_GEM_DOMAIN_GTT) {
1326 stats->requested_gtt += size;
1331 * amdgpu_bo_release_notify - notification about a BO being released
1332 * @bo: pointer to a buffer object
1334 * Wipes VRAM buffers whose contents should not be leaked before the
1335 * memory is released.
1337 void amdgpu_bo_release_notify(struct ttm_buffer_object *bo)
1339 struct amdgpu_device *adev = amdgpu_ttm_adev(bo->bdev);
1340 struct dma_fence *fence = NULL;
1341 struct amdgpu_bo *abo;
1344 if (!amdgpu_bo_is_amdgpu_bo(bo))
1347 abo = ttm_to_amdgpu_bo(bo);
1350 amdgpu_amdkfd_release_notify(abo);
1352 /* We only remove the fence if the resv has individualized. */
1353 WARN_ON_ONCE(bo->type == ttm_bo_type_kernel
1354 && bo->base.resv != &bo->base._resv);
1355 if (bo->base.resv == &bo->base._resv)
1356 amdgpu_amdkfd_remove_fence_on_pt_pd_bos(abo);
1358 if (!bo->resource || bo->resource->mem_type != TTM_PL_VRAM ||
1359 !(abo->flags & AMDGPU_GEM_CREATE_VRAM_WIPE_ON_RELEASE) ||
1360 adev->in_suspend || drm_dev_is_unplugged(adev_to_drm(adev)))
1363 if (WARN_ON_ONCE(!dma_resv_trylock(bo->base.resv)))
1366 r = amdgpu_fill_buffer(abo, AMDGPU_POISON, bo->base.resv, &fence, true);
1368 amdgpu_bo_fence(abo, fence, false);
1369 dma_fence_put(fence);
1372 dma_resv_unlock(bo->base.resv);
1376 * amdgpu_bo_fault_reserve_notify - notification about a memory fault
1377 * @bo: pointer to a buffer object
1379 * Notifies the driver we are taking a fault on this BO and have reserved it,
1380 * also performs bookkeeping.
1381 * TTM driver callback for dealing with vm faults.
1384 * 0 for success or a negative error code on failure.
1386 vm_fault_t amdgpu_bo_fault_reserve_notify(struct ttm_buffer_object *bo)
1388 struct amdgpu_device *adev = amdgpu_ttm_adev(bo->bdev);
1389 struct ttm_operation_ctx ctx = { false, false };
1390 struct amdgpu_bo *abo = ttm_to_amdgpu_bo(bo);
1393 /* Remember that this BO was accessed by the CPU */
1394 abo->flags |= AMDGPU_GEM_CREATE_CPU_ACCESS_REQUIRED;
1396 if (bo->resource->mem_type != TTM_PL_VRAM)
1399 if (amdgpu_bo_in_cpu_visible_vram(abo))
1402 /* Can't move a pinned BO to visible VRAM */
1403 if (abo->tbo.pin_count > 0)
1404 return VM_FAULT_SIGBUS;
1406 /* hurrah the memory is not visible ! */
1407 atomic64_inc(&adev->num_vram_cpu_page_faults);
1408 amdgpu_bo_placement_from_domain(abo, AMDGPU_GEM_DOMAIN_VRAM |
1409 AMDGPU_GEM_DOMAIN_GTT);
1411 /* Avoid costly evictions; only set GTT as a busy placement */
1412 abo->placement.num_busy_placement = 1;
1413 abo->placement.busy_placement = &abo->placements[1];
1415 r = ttm_bo_validate(bo, &abo->placement, &ctx);
1416 if (unlikely(r == -EBUSY || r == -ERESTARTSYS))
1417 return VM_FAULT_NOPAGE;
1418 else if (unlikely(r))
1419 return VM_FAULT_SIGBUS;
1421 /* this should never happen */
1422 if (bo->resource->mem_type == TTM_PL_VRAM &&
1423 !amdgpu_bo_in_cpu_visible_vram(abo))
1424 return VM_FAULT_SIGBUS;
1426 ttm_bo_move_to_lru_tail_unlocked(bo);
1431 * amdgpu_bo_fence - add fence to buffer object
1433 * @bo: buffer object in question
1434 * @fence: fence to add
1435 * @shared: true if fence should be added shared
1438 void amdgpu_bo_fence(struct amdgpu_bo *bo, struct dma_fence *fence,
1441 struct dma_resv *resv = bo->tbo.base.resv;
1444 r = dma_resv_reserve_fences(resv, 1);
1446 /* As last resort on OOM we block for the fence */
1447 dma_fence_wait(fence, false);
1451 dma_resv_add_fence(resv, fence, shared ? DMA_RESV_USAGE_READ :
1452 DMA_RESV_USAGE_WRITE);
1456 * amdgpu_bo_sync_wait_resv - Wait for BO reservation fences
1458 * @adev: amdgpu device pointer
1459 * @resv: reservation object to sync to
1460 * @sync_mode: synchronization mode
1461 * @owner: fence owner
1462 * @intr: Whether the wait is interruptible
1464 * Extract the fences from the reservation object and waits for them to finish.
1467 * 0 on success, errno otherwise.
1469 int amdgpu_bo_sync_wait_resv(struct amdgpu_device *adev, struct dma_resv *resv,
1470 enum amdgpu_sync_mode sync_mode, void *owner,
1473 struct amdgpu_sync sync;
1476 amdgpu_sync_create(&sync);
1477 amdgpu_sync_resv(adev, &sync, resv, sync_mode, owner);
1478 r = amdgpu_sync_wait(&sync, intr);
1479 amdgpu_sync_free(&sync);
1484 * amdgpu_bo_sync_wait - Wrapper for amdgpu_bo_sync_wait_resv
1485 * @bo: buffer object to wait for
1486 * @owner: fence owner
1487 * @intr: Whether the wait is interruptible
1489 * Wrapper to wait for fences in a BO.
1491 * 0 on success, errno otherwise.
1493 int amdgpu_bo_sync_wait(struct amdgpu_bo *bo, void *owner, bool intr)
1495 struct amdgpu_device *adev = amdgpu_ttm_adev(bo->tbo.bdev);
1497 return amdgpu_bo_sync_wait_resv(adev, bo->tbo.base.resv,
1498 AMDGPU_SYNC_NE_OWNER, owner, intr);
1502 * amdgpu_bo_gpu_offset - return GPU offset of bo
1503 * @bo: amdgpu object for which we query the offset
1505 * Note: object should either be pinned or reserved when calling this
1506 * function, it might be useful to add check for this for debugging.
1509 * current GPU offset of the object.
1511 u64 amdgpu_bo_gpu_offset(struct amdgpu_bo *bo)
1513 WARN_ON_ONCE(bo->tbo.resource->mem_type == TTM_PL_SYSTEM);
1514 WARN_ON_ONCE(!dma_resv_is_locked(bo->tbo.base.resv) &&
1515 !bo->tbo.pin_count && bo->tbo.type != ttm_bo_type_kernel);
1516 WARN_ON_ONCE(bo->tbo.resource->start == AMDGPU_BO_INVALID_OFFSET);
1517 WARN_ON_ONCE(bo->tbo.resource->mem_type == TTM_PL_VRAM &&
1518 !(bo->flags & AMDGPU_GEM_CREATE_VRAM_CONTIGUOUS));
1520 return amdgpu_bo_gpu_offset_no_check(bo);
1524 * amdgpu_bo_gpu_offset_no_check - return GPU offset of bo
1525 * @bo: amdgpu object for which we query the offset
1528 * current GPU offset of the object without raising warnings.
1530 u64 amdgpu_bo_gpu_offset_no_check(struct amdgpu_bo *bo)
1532 struct amdgpu_device *adev = amdgpu_ttm_adev(bo->tbo.bdev);
1535 offset = (bo->tbo.resource->start << PAGE_SHIFT) +
1536 amdgpu_ttm_domain_start(adev, bo->tbo.resource->mem_type);
1538 return amdgpu_gmc_sign_extend(offset);
1542 * amdgpu_bo_get_preferred_domain - get preferred domain
1543 * @adev: amdgpu device object
1544 * @domain: allowed :ref:`memory domains <amdgpu_memory_domains>`
1547 * Which of the allowed domains is preferred for allocating the BO.
1549 uint32_t amdgpu_bo_get_preferred_domain(struct amdgpu_device *adev,
1552 if ((domain == (AMDGPU_GEM_DOMAIN_VRAM | AMDGPU_GEM_DOMAIN_GTT)) &&
1553 ((adev->asic_type == CHIP_CARRIZO) || (adev->asic_type == CHIP_STONEY))) {
1554 domain = AMDGPU_GEM_DOMAIN_VRAM;
1555 if (adev->gmc.real_vram_size <= AMDGPU_SG_THRESHOLD)
1556 domain = AMDGPU_GEM_DOMAIN_GTT;
1561 #if defined(CONFIG_DEBUG_FS)
1562 #define amdgpu_bo_print_flag(m, bo, flag) \
1564 if (bo->flags & (AMDGPU_GEM_CREATE_ ## flag)) { \
1565 seq_printf((m), " " #flag); \
1570 * amdgpu_bo_print_info - print BO info in debugfs file
1572 * @id: Index or Id of the BO
1573 * @bo: Requested BO for printing info
1576 * Print BO information in debugfs file
1579 * Size of the BO in bytes.
1581 u64 amdgpu_bo_print_info(int id, struct amdgpu_bo *bo, struct seq_file *m)
1583 struct dma_buf_attachment *attachment;
1584 struct dma_buf *dma_buf;
1585 const char *placement;
1586 unsigned int pin_count;
1589 if (dma_resv_trylock(bo->tbo.base.resv)) {
1590 unsigned int domain;
1591 domain = amdgpu_mem_type_to_domain(bo->tbo.resource->mem_type);
1593 case AMDGPU_GEM_DOMAIN_VRAM:
1594 if (amdgpu_bo_in_cpu_visible_vram(bo))
1595 placement = "VRAM VISIBLE";
1599 case AMDGPU_GEM_DOMAIN_GTT:
1602 case AMDGPU_GEM_DOMAIN_CPU:
1607 dma_resv_unlock(bo->tbo.base.resv);
1609 placement = "UNKNOWN";
1612 size = amdgpu_bo_size(bo);
1613 seq_printf(m, "\t\t0x%08x: %12lld byte %s",
1614 id, size, placement);
1616 pin_count = READ_ONCE(bo->tbo.pin_count);
1618 seq_printf(m, " pin count %d", pin_count);
1620 dma_buf = READ_ONCE(bo->tbo.base.dma_buf);
1621 attachment = READ_ONCE(bo->tbo.base.import_attach);
1624 seq_printf(m, " imported from ino:%lu", file_inode(dma_buf->file)->i_ino);
1626 seq_printf(m, " exported as ino:%lu", file_inode(dma_buf->file)->i_ino);
1628 amdgpu_bo_print_flag(m, bo, CPU_ACCESS_REQUIRED);
1629 amdgpu_bo_print_flag(m, bo, NO_CPU_ACCESS);
1630 amdgpu_bo_print_flag(m, bo, CPU_GTT_USWC);
1631 amdgpu_bo_print_flag(m, bo, VRAM_CLEARED);
1632 amdgpu_bo_print_flag(m, bo, VRAM_CONTIGUOUS);
1633 amdgpu_bo_print_flag(m, bo, VM_ALWAYS_VALID);
1634 amdgpu_bo_print_flag(m, bo, EXPLICIT_SYNC);