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;
226 * amdgpu_bo_create_reserved - create reserved BO for kernel use
228 * @adev: amdgpu device object
229 * @size: size for the new BO
230 * @align: alignment for the new BO
231 * @domain: where to place it
232 * @bo_ptr: used to initialize BOs in structures
233 * @gpu_addr: GPU addr of the pinned BO
234 * @cpu_addr: optional CPU address mapping
236 * Allocates and pins a BO for kernel internal use, and returns it still
239 * Note: For bo_ptr new BO is only created if bo_ptr points to NULL.
242 * 0 on success, negative error code otherwise.
244 int amdgpu_bo_create_reserved(struct amdgpu_device *adev,
245 unsigned long size, int align,
246 u32 domain, struct amdgpu_bo **bo_ptr,
247 u64 *gpu_addr, void **cpu_addr)
249 struct amdgpu_bo_param bp;
254 amdgpu_bo_unref(bo_ptr);
258 memset(&bp, 0, sizeof(bp));
260 bp.byte_align = align;
262 bp.flags = cpu_addr ? AMDGPU_GEM_CREATE_CPU_ACCESS_REQUIRED
263 : AMDGPU_GEM_CREATE_NO_CPU_ACCESS;
264 bp.flags |= AMDGPU_GEM_CREATE_VRAM_CONTIGUOUS;
265 bp.type = ttm_bo_type_kernel;
267 bp.bo_ptr_size = sizeof(struct amdgpu_bo);
270 r = amdgpu_bo_create(adev, &bp, bo_ptr);
272 dev_err(adev->dev, "(%d) failed to allocate kernel bo\n",
279 r = amdgpu_bo_reserve(*bo_ptr, false);
281 dev_err(adev->dev, "(%d) failed to reserve kernel bo\n", r);
285 r = amdgpu_bo_pin(*bo_ptr, domain);
287 dev_err(adev->dev, "(%d) kernel bo pin failed\n", r);
288 goto error_unreserve;
291 r = amdgpu_ttm_alloc_gart(&(*bo_ptr)->tbo);
293 dev_err(adev->dev, "%p bind failed\n", *bo_ptr);
298 *gpu_addr = amdgpu_bo_gpu_offset(*bo_ptr);
301 r = amdgpu_bo_kmap(*bo_ptr, cpu_addr);
303 dev_err(adev->dev, "(%d) kernel bo map failed\n", r);
311 amdgpu_bo_unpin(*bo_ptr);
313 amdgpu_bo_unreserve(*bo_ptr);
317 amdgpu_bo_unref(bo_ptr);
323 * amdgpu_bo_create_kernel - create BO for kernel use
325 * @adev: amdgpu device object
326 * @size: size for the new BO
327 * @align: alignment for the new BO
328 * @domain: where to place it
329 * @bo_ptr: used to initialize BOs in structures
330 * @gpu_addr: GPU addr of the pinned BO
331 * @cpu_addr: optional CPU address mapping
333 * Allocates and pins a BO for kernel internal use.
335 * Note: For bo_ptr new BO is only created if bo_ptr points to NULL.
338 * 0 on success, negative error code otherwise.
340 int amdgpu_bo_create_kernel(struct amdgpu_device *adev,
341 unsigned long size, int align,
342 u32 domain, struct amdgpu_bo **bo_ptr,
343 u64 *gpu_addr, void **cpu_addr)
347 r = amdgpu_bo_create_reserved(adev, size, align, domain, bo_ptr,
354 amdgpu_bo_unreserve(*bo_ptr);
360 * amdgpu_bo_create_kernel_at - create BO for kernel use at specific location
362 * @adev: amdgpu device object
363 * @offset: offset of the BO
364 * @size: size of the BO
365 * @bo_ptr: used to initialize BOs in structures
366 * @cpu_addr: optional CPU address mapping
368 * Creates a kernel BO at a specific offset in VRAM.
371 * 0 on success, negative error code otherwise.
373 int amdgpu_bo_create_kernel_at(struct amdgpu_device *adev,
374 uint64_t offset, uint64_t size,
375 struct amdgpu_bo **bo_ptr, void **cpu_addr)
377 struct ttm_operation_ctx ctx = { false, false };
382 size = ALIGN(size, PAGE_SIZE);
384 r = amdgpu_bo_create_reserved(adev, size, PAGE_SIZE,
385 AMDGPU_GEM_DOMAIN_VRAM, bo_ptr, NULL,
390 if ((*bo_ptr) == NULL)
394 * Remove the original mem node and create a new one at the request
398 amdgpu_bo_kunmap(*bo_ptr);
400 ttm_resource_free(&(*bo_ptr)->tbo, &(*bo_ptr)->tbo.resource);
402 for (i = 0; i < (*bo_ptr)->placement.num_placement; ++i) {
403 (*bo_ptr)->placements[i].fpfn = offset >> PAGE_SHIFT;
404 (*bo_ptr)->placements[i].lpfn = (offset + size) >> PAGE_SHIFT;
406 r = ttm_bo_mem_space(&(*bo_ptr)->tbo, &(*bo_ptr)->placement,
407 &(*bo_ptr)->tbo.resource, &ctx);
412 r = amdgpu_bo_kmap(*bo_ptr, cpu_addr);
417 amdgpu_bo_unreserve(*bo_ptr);
421 amdgpu_bo_unreserve(*bo_ptr);
422 amdgpu_bo_unref(bo_ptr);
427 * amdgpu_bo_free_kernel - free BO for kernel use
429 * @bo: amdgpu BO to free
430 * @gpu_addr: pointer to where the BO's GPU memory space address was stored
431 * @cpu_addr: pointer to where the BO's CPU memory space address was stored
433 * unmaps and unpin a BO for kernel internal use.
435 void amdgpu_bo_free_kernel(struct amdgpu_bo **bo, u64 *gpu_addr,
441 WARN_ON(amdgpu_ttm_adev((*bo)->tbo.bdev)->in_suspend);
443 if (likely(amdgpu_bo_reserve(*bo, true) == 0)) {
445 amdgpu_bo_kunmap(*bo);
447 amdgpu_bo_unpin(*bo);
448 amdgpu_bo_unreserve(*bo);
459 /* Validate bo size is bit bigger than the request domain */
460 static bool amdgpu_bo_validate_size(struct amdgpu_device *adev,
461 unsigned long size, u32 domain)
463 struct ttm_resource_manager *man = NULL;
466 * If GTT is part of requested domains the check must succeed to
467 * allow fall back to GTT.
469 if (domain & AMDGPU_GEM_DOMAIN_GTT)
470 man = ttm_manager_type(&adev->mman.bdev, TTM_PL_TT);
471 else if (domain & AMDGPU_GEM_DOMAIN_VRAM)
472 man = ttm_manager_type(&adev->mman.bdev, TTM_PL_VRAM);
477 if (domain & AMDGPU_GEM_DOMAIN_GTT)
478 WARN_ON_ONCE("GTT domain requested but GTT mem manager uninitialized");
482 /* TODO add more domains checks, such as AMDGPU_GEM_DOMAIN_CPU, _DOMAIN_DOORBELL */
483 if (size < man->size)
486 DRM_DEBUG("BO size %lu > total memory in domain: %llu\n", size, man->size);
490 bool amdgpu_bo_support_uswc(u64 bo_flags)
494 /* XXX: Write-combined CPU mappings of GTT seem broken on 32-bit
495 * See https://bugs.freedesktop.org/show_bug.cgi?id=84627
498 #elif defined(CONFIG_X86) && !defined(CONFIG_X86_PAT)
499 /* Don't try to enable write-combining when it can't work, or things
501 * See https://bugs.freedesktop.org/show_bug.cgi?id=88758
504 #ifndef CONFIG_COMPILE_TEST
505 #warning Please enable CONFIG_MTRR and CONFIG_X86_PAT for better performance \
506 thanks to write-combining
509 if (bo_flags & AMDGPU_GEM_CREATE_CPU_GTT_USWC)
510 DRM_INFO_ONCE("Please enable CONFIG_MTRR and CONFIG_X86_PAT for "
511 "better performance thanks to write-combining\n");
514 /* For architectures that don't support WC memory,
515 * mask out the WC flag from the BO
517 if (!drm_arch_can_wc_memory())
525 * amdgpu_bo_create - create an &amdgpu_bo buffer object
526 * @adev: amdgpu device object
527 * @bp: parameters to be used for the buffer object
528 * @bo_ptr: pointer to the buffer object pointer
530 * Creates an &amdgpu_bo buffer object.
533 * 0 for success or a negative error code on failure.
535 int amdgpu_bo_create(struct amdgpu_device *adev,
536 struct amdgpu_bo_param *bp,
537 struct amdgpu_bo **bo_ptr)
539 struct ttm_operation_ctx ctx = {
540 .interruptible = (bp->type != ttm_bo_type_kernel),
541 .no_wait_gpu = bp->no_wait_gpu,
542 /* We opt to avoid OOM on system pages allocations */
543 .gfp_retry_mayfail = true,
544 .allow_res_evict = bp->type != ttm_bo_type_kernel,
547 struct amdgpu_bo *bo;
548 unsigned long page_align, size = bp->size;
551 /* Note that GDS/GWS/OA allocates 1 page per byte/resource. */
552 if (bp->domain & (AMDGPU_GEM_DOMAIN_GWS | AMDGPU_GEM_DOMAIN_OA)) {
553 /* GWS and OA don't need any alignment. */
554 page_align = bp->byte_align;
557 } else if (bp->domain & AMDGPU_GEM_DOMAIN_GDS) {
558 /* Both size and alignment must be a multiple of 4. */
559 page_align = ALIGN(bp->byte_align, 4);
560 size = ALIGN(size, 4) << PAGE_SHIFT;
562 /* Memory should be aligned at least to a page size. */
563 page_align = ALIGN(bp->byte_align, PAGE_SIZE) >> PAGE_SHIFT;
564 size = ALIGN(size, PAGE_SIZE);
567 if (!amdgpu_bo_validate_size(adev, size, bp->domain))
570 BUG_ON(bp->bo_ptr_size < sizeof(struct amdgpu_bo));
573 bo = kvzalloc(bp->bo_ptr_size, GFP_KERNEL);
576 drm_gem_private_object_init(adev_to_drm(adev), &bo->tbo.base, size);
578 bo->preferred_domains = bp->preferred_domain ? bp->preferred_domain :
580 bo->allowed_domains = bo->preferred_domains;
581 if (bp->type != ttm_bo_type_kernel &&
582 !(bp->flags & AMDGPU_GEM_CREATE_DISCARDABLE) &&
583 bo->allowed_domains == AMDGPU_GEM_DOMAIN_VRAM)
584 bo->allowed_domains |= AMDGPU_GEM_DOMAIN_GTT;
586 bo->flags = bp->flags;
588 if (adev->gmc.mem_partitions)
589 /* For GPUs with spatial partitioning, bo->xcp_id=-1 means any partition */
590 bo->xcp_id = bp->xcp_id_plus1 - 1;
592 /* For GPUs without spatial partitioning */
595 if (!amdgpu_bo_support_uswc(bo->flags))
596 bo->flags &= ~AMDGPU_GEM_CREATE_CPU_GTT_USWC;
598 if (adev->ras_enabled)
599 bo->flags |= AMDGPU_GEM_CREATE_VRAM_WIPE_ON_RELEASE;
601 bo->tbo.bdev = &adev->mman.bdev;
602 if (bp->domain & (AMDGPU_GEM_DOMAIN_GWS | AMDGPU_GEM_DOMAIN_OA |
603 AMDGPU_GEM_DOMAIN_GDS))
604 amdgpu_bo_placement_from_domain(bo, AMDGPU_GEM_DOMAIN_CPU);
606 amdgpu_bo_placement_from_domain(bo, bp->domain);
607 if (bp->type == ttm_bo_type_kernel)
608 bo->tbo.priority = 1;
611 bp->destroy = &amdgpu_bo_destroy;
613 r = ttm_bo_init_reserved(&adev->mman.bdev, &bo->tbo, bp->type,
614 &bo->placement, page_align, &ctx, NULL,
615 bp->resv, bp->destroy);
616 if (unlikely(r != 0))
619 if (!amdgpu_gmc_vram_full_visible(&adev->gmc) &&
620 amdgpu_res_cpu_visible(adev, bo->tbo.resource))
621 amdgpu_cs_report_moved_bytes(adev, ctx.bytes_moved,
624 amdgpu_cs_report_moved_bytes(adev, ctx.bytes_moved, 0);
626 if (bp->flags & AMDGPU_GEM_CREATE_VRAM_CLEARED &&
627 bo->tbo.resource->mem_type == TTM_PL_VRAM) {
628 struct dma_fence *fence;
630 r = amdgpu_fill_buffer(bo, 0, bo->tbo.base.resv, &fence, true);
634 dma_resv_add_fence(bo->tbo.base.resv, fence,
635 DMA_RESV_USAGE_KERNEL);
636 dma_fence_put(fence);
639 amdgpu_bo_unreserve(bo);
642 trace_amdgpu_bo_create(bo);
644 /* Treat CPU_ACCESS_REQUIRED only as a hint if given by UMD */
645 if (bp->type == ttm_bo_type_device)
646 bo->flags &= ~AMDGPU_GEM_CREATE_CPU_ACCESS_REQUIRED;
652 dma_resv_unlock(bo->tbo.base.resv);
653 amdgpu_bo_unref(&bo);
658 * amdgpu_bo_create_user - create an &amdgpu_bo_user buffer object
659 * @adev: amdgpu device object
660 * @bp: parameters to be used for the buffer object
661 * @ubo_ptr: pointer to the buffer object pointer
663 * Create a BO to be used by user application;
666 * 0 for success or a negative error code on failure.
669 int amdgpu_bo_create_user(struct amdgpu_device *adev,
670 struct amdgpu_bo_param *bp,
671 struct amdgpu_bo_user **ubo_ptr)
673 struct amdgpu_bo *bo_ptr;
676 bp->bo_ptr_size = sizeof(struct amdgpu_bo_user);
677 bp->destroy = &amdgpu_bo_user_destroy;
678 r = amdgpu_bo_create(adev, bp, &bo_ptr);
682 *ubo_ptr = to_amdgpu_bo_user(bo_ptr);
687 * amdgpu_bo_create_vm - create an &amdgpu_bo_vm buffer object
688 * @adev: amdgpu device object
689 * @bp: parameters to be used for the buffer object
690 * @vmbo_ptr: pointer to the buffer object pointer
692 * Create a BO to be for GPUVM.
695 * 0 for success or a negative error code on failure.
698 int amdgpu_bo_create_vm(struct amdgpu_device *adev,
699 struct amdgpu_bo_param *bp,
700 struct amdgpu_bo_vm **vmbo_ptr)
702 struct amdgpu_bo *bo_ptr;
705 /* bo_ptr_size will be determined by the caller and it depends on
706 * num of amdgpu_vm_pt entries.
708 BUG_ON(bp->bo_ptr_size < sizeof(struct amdgpu_bo_vm));
709 r = amdgpu_bo_create(adev, bp, &bo_ptr);
713 *vmbo_ptr = to_amdgpu_bo_vm(bo_ptr);
718 * amdgpu_bo_add_to_shadow_list - add a BO to the shadow list
720 * @vmbo: BO that will be inserted into the shadow list
722 * Insert a BO to the shadow list.
724 void amdgpu_bo_add_to_shadow_list(struct amdgpu_bo_vm *vmbo)
726 struct amdgpu_device *adev = amdgpu_ttm_adev(vmbo->bo.tbo.bdev);
728 mutex_lock(&adev->shadow_list_lock);
729 list_add_tail(&vmbo->shadow_list, &adev->shadow_list);
730 vmbo->shadow->parent = amdgpu_bo_ref(&vmbo->bo);
731 vmbo->shadow->tbo.destroy = &amdgpu_bo_vm_destroy;
732 mutex_unlock(&adev->shadow_list_lock);
736 * amdgpu_bo_restore_shadow - restore an &amdgpu_bo shadow
738 * @shadow: &amdgpu_bo shadow to be restored
739 * @fence: dma_fence associated with the operation
741 * Copies a buffer object's shadow content back to the object.
742 * This is used for recovering a buffer from its shadow in case of a gpu
743 * reset where vram context may be lost.
746 * 0 for success or a negative error code on failure.
748 int amdgpu_bo_restore_shadow(struct amdgpu_bo *shadow, struct dma_fence **fence)
751 struct amdgpu_device *adev = amdgpu_ttm_adev(shadow->tbo.bdev);
752 struct amdgpu_ring *ring = adev->mman.buffer_funcs_ring;
753 uint64_t shadow_addr, parent_addr;
755 shadow_addr = amdgpu_bo_gpu_offset(shadow);
756 parent_addr = amdgpu_bo_gpu_offset(shadow->parent);
758 return amdgpu_copy_buffer(ring, shadow_addr, parent_addr,
759 amdgpu_bo_size(shadow), NULL, fence,
764 * amdgpu_bo_kmap - map an &amdgpu_bo buffer object
765 * @bo: &amdgpu_bo buffer object to be mapped
766 * @ptr: kernel virtual address to be returned
768 * Calls ttm_bo_kmap() to set up the kernel virtual mapping; calls
769 * amdgpu_bo_kptr() to get the kernel virtual address.
772 * 0 for success or a negative error code on failure.
774 int amdgpu_bo_kmap(struct amdgpu_bo *bo, void **ptr)
779 if (bo->flags & AMDGPU_GEM_CREATE_NO_CPU_ACCESS)
782 r = dma_resv_wait_timeout(bo->tbo.base.resv, DMA_RESV_USAGE_KERNEL,
783 false, MAX_SCHEDULE_TIMEOUT);
787 kptr = amdgpu_bo_kptr(bo);
794 r = ttm_bo_kmap(&bo->tbo, 0, PFN_UP(bo->tbo.base.size), &bo->kmap);
799 *ptr = amdgpu_bo_kptr(bo);
805 * amdgpu_bo_kptr - returns a kernel virtual address of the buffer object
806 * @bo: &amdgpu_bo buffer object
808 * Calls ttm_kmap_obj_virtual() to get the kernel virtual address
811 * the virtual address of a buffer object area.
813 void *amdgpu_bo_kptr(struct amdgpu_bo *bo)
817 return ttm_kmap_obj_virtual(&bo->kmap, &is_iomem);
821 * amdgpu_bo_kunmap - unmap an &amdgpu_bo buffer object
822 * @bo: &amdgpu_bo buffer object to be unmapped
824 * Unmaps a kernel map set up by amdgpu_bo_kmap().
826 void amdgpu_bo_kunmap(struct amdgpu_bo *bo)
829 ttm_bo_kunmap(&bo->kmap);
833 * amdgpu_bo_ref - reference an &amdgpu_bo buffer object
834 * @bo: &amdgpu_bo buffer object
836 * References the contained &ttm_buffer_object.
839 * a refcounted pointer to the &amdgpu_bo buffer object.
841 struct amdgpu_bo *amdgpu_bo_ref(struct amdgpu_bo *bo)
846 ttm_bo_get(&bo->tbo);
851 * amdgpu_bo_unref - unreference an &amdgpu_bo buffer object
852 * @bo: &amdgpu_bo buffer object
854 * Unreferences the contained &ttm_buffer_object and clear the pointer
856 void amdgpu_bo_unref(struct amdgpu_bo **bo)
858 struct ttm_buffer_object *tbo;
869 * amdgpu_bo_pin_restricted - pin an &amdgpu_bo buffer object
870 * @bo: &amdgpu_bo buffer object to be pinned
871 * @domain: domain to be pinned to
872 * @min_offset: the start of requested address range
873 * @max_offset: the end of requested address range
875 * Pins the buffer object according to requested domain and address range. If
876 * the memory is unbound gart memory, binds the pages into gart table. Adjusts
877 * pin_count and pin_size accordingly.
879 * Pinning means to lock pages in memory along with keeping them at a fixed
880 * offset. It is required when a buffer can not be moved, for example, when
881 * a display buffer is being scanned out.
883 * Compared with amdgpu_bo_pin(), this function gives more flexibility on
884 * where to pin a buffer if there are specific restrictions on where a buffer
888 * 0 for success or a negative error code on failure.
890 int amdgpu_bo_pin_restricted(struct amdgpu_bo *bo, u32 domain,
891 u64 min_offset, u64 max_offset)
893 struct amdgpu_device *adev = amdgpu_ttm_adev(bo->tbo.bdev);
894 struct ttm_operation_ctx ctx = { false, false };
897 if (amdgpu_ttm_tt_get_usermm(bo->tbo.ttm))
900 if (WARN_ON_ONCE(min_offset > max_offset))
903 /* Check domain to be pinned to against preferred domains */
904 if (bo->preferred_domains & domain)
905 domain = bo->preferred_domains & domain;
907 /* A shared bo cannot be migrated to VRAM */
908 if (bo->tbo.base.import_attach) {
909 if (domain & AMDGPU_GEM_DOMAIN_GTT)
910 domain = AMDGPU_GEM_DOMAIN_GTT;
915 if (bo->tbo.pin_count) {
916 uint32_t mem_type = bo->tbo.resource->mem_type;
917 uint32_t mem_flags = bo->tbo.resource->placement;
919 if (!(domain & amdgpu_mem_type_to_domain(mem_type)))
922 if ((mem_type == TTM_PL_VRAM) &&
923 (bo->flags & AMDGPU_GEM_CREATE_VRAM_CONTIGUOUS) &&
924 !(mem_flags & TTM_PL_FLAG_CONTIGUOUS))
927 ttm_bo_pin(&bo->tbo);
929 if (max_offset != 0) {
930 u64 domain_start = amdgpu_ttm_domain_start(adev,
932 WARN_ON_ONCE(max_offset <
933 (amdgpu_bo_gpu_offset(bo) - domain_start));
939 /* This assumes only APU display buffers are pinned with (VRAM|GTT).
940 * See function amdgpu_display_supported_domains()
942 domain = amdgpu_bo_get_preferred_domain(adev, domain);
944 if (bo->tbo.base.import_attach)
945 dma_buf_pin(bo->tbo.base.import_attach);
947 /* force to pin into visible video ram */
948 if (!(bo->flags & AMDGPU_GEM_CREATE_NO_CPU_ACCESS))
949 bo->flags |= AMDGPU_GEM_CREATE_CPU_ACCESS_REQUIRED;
950 amdgpu_bo_placement_from_domain(bo, domain);
951 for (i = 0; i < bo->placement.num_placement; i++) {
952 unsigned int fpfn, lpfn;
954 fpfn = min_offset >> PAGE_SHIFT;
955 lpfn = max_offset >> PAGE_SHIFT;
957 if (fpfn > bo->placements[i].fpfn)
958 bo->placements[i].fpfn = fpfn;
959 if (!bo->placements[i].lpfn ||
960 (lpfn && lpfn < bo->placements[i].lpfn))
961 bo->placements[i].lpfn = lpfn;
964 r = ttm_bo_validate(&bo->tbo, &bo->placement, &ctx);
966 dev_err(adev->dev, "%p pin failed\n", bo);
970 ttm_bo_pin(&bo->tbo);
972 domain = amdgpu_mem_type_to_domain(bo->tbo.resource->mem_type);
973 if (domain == AMDGPU_GEM_DOMAIN_VRAM) {
974 atomic64_add(amdgpu_bo_size(bo), &adev->vram_pin_size);
975 atomic64_add(amdgpu_vram_mgr_bo_visible_size(bo),
976 &adev->visible_pin_size);
977 } else if (domain == AMDGPU_GEM_DOMAIN_GTT) {
978 atomic64_add(amdgpu_bo_size(bo), &adev->gart_pin_size);
986 * amdgpu_bo_pin - pin an &amdgpu_bo buffer object
987 * @bo: &amdgpu_bo buffer object to be pinned
988 * @domain: domain to be pinned to
990 * A simple wrapper to amdgpu_bo_pin_restricted().
991 * Provides a simpler API for buffers that do not have any strict restrictions
992 * on where a buffer must be located.
995 * 0 for success or a negative error code on failure.
997 int amdgpu_bo_pin(struct amdgpu_bo *bo, u32 domain)
999 bo->flags |= AMDGPU_GEM_CREATE_VRAM_CONTIGUOUS;
1000 return amdgpu_bo_pin_restricted(bo, domain, 0, 0);
1004 * amdgpu_bo_unpin - unpin an &amdgpu_bo buffer object
1005 * @bo: &amdgpu_bo buffer object to be unpinned
1007 * Decreases the pin_count, and clears the flags if pin_count reaches 0.
1008 * Changes placement and pin size accordingly.
1011 * 0 for success or a negative error code on failure.
1013 void amdgpu_bo_unpin(struct amdgpu_bo *bo)
1015 struct amdgpu_device *adev = amdgpu_ttm_adev(bo->tbo.bdev);
1017 ttm_bo_unpin(&bo->tbo);
1018 if (bo->tbo.pin_count)
1021 if (bo->tbo.base.import_attach)
1022 dma_buf_unpin(bo->tbo.base.import_attach);
1024 if (bo->tbo.resource->mem_type == TTM_PL_VRAM) {
1025 atomic64_sub(amdgpu_bo_size(bo), &adev->vram_pin_size);
1026 atomic64_sub(amdgpu_vram_mgr_bo_visible_size(bo),
1027 &adev->visible_pin_size);
1028 } else if (bo->tbo.resource->mem_type == TTM_PL_TT) {
1029 atomic64_sub(amdgpu_bo_size(bo), &adev->gart_pin_size);
1034 static const char * const amdgpu_vram_names[] = {
1051 * amdgpu_bo_init - initialize memory manager
1052 * @adev: amdgpu device object
1054 * Calls amdgpu_ttm_init() to initialize amdgpu memory manager.
1057 * 0 for success or a negative error code on failure.
1059 int amdgpu_bo_init(struct amdgpu_device *adev)
1061 /* On A+A platform, VRAM can be mapped as WB */
1062 if (!adev->gmc.xgmi.connected_to_cpu && !adev->gmc.is_app_apu) {
1063 /* reserve PAT memory space to WC for VRAM */
1064 int r = arch_io_reserve_memtype_wc(adev->gmc.aper_base,
1065 adev->gmc.aper_size);
1068 DRM_ERROR("Unable to set WC memtype for the aperture base\n");
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);
1077 DRM_INFO("Detected VRAM RAM=%lluM, BAR=%lluM\n",
1078 adev->gmc.mc_vram_size >> 20,
1079 (unsigned long long)adev->gmc.aper_size >> 20);
1080 DRM_INFO("RAM width %dbits %s\n",
1081 adev->gmc.vram_width, amdgpu_vram_names[adev->gmc.vram_type]);
1082 return amdgpu_ttm_init(adev);
1086 * amdgpu_bo_fini - tear down memory manager
1087 * @adev: amdgpu device object
1089 * Reverses amdgpu_bo_init() to tear down memory manager.
1091 void amdgpu_bo_fini(struct amdgpu_device *adev)
1095 amdgpu_ttm_fini(adev);
1097 if (drm_dev_enter(adev_to_drm(adev), &idx)) {
1098 if (!adev->gmc.xgmi.connected_to_cpu && !adev->gmc.is_app_apu) {
1099 arch_phys_wc_del(adev->gmc.vram_mtrr);
1100 arch_io_free_memtype_wc(adev->gmc.aper_base, adev->gmc.aper_size);
1107 * amdgpu_bo_set_tiling_flags - set tiling flags
1108 * @bo: &amdgpu_bo buffer object
1109 * @tiling_flags: new flags
1111 * Sets buffer object's tiling flags with the new one. Used by GEM ioctl or
1112 * kernel driver to set the tiling flags on a buffer.
1115 * 0 for success or a negative error code on failure.
1117 int amdgpu_bo_set_tiling_flags(struct amdgpu_bo *bo, u64 tiling_flags)
1119 struct amdgpu_device *adev = amdgpu_ttm_adev(bo->tbo.bdev);
1120 struct amdgpu_bo_user *ubo;
1122 BUG_ON(bo->tbo.type == ttm_bo_type_kernel);
1123 if (adev->family <= AMDGPU_FAMILY_CZ &&
1124 AMDGPU_TILING_GET(tiling_flags, TILE_SPLIT) > 6)
1127 ubo = to_amdgpu_bo_user(bo);
1128 ubo->tiling_flags = tiling_flags;
1133 * amdgpu_bo_get_tiling_flags - get tiling flags
1134 * @bo: &amdgpu_bo buffer object
1135 * @tiling_flags: returned flags
1137 * Gets buffer object's tiling flags. Used by GEM ioctl or kernel driver to
1138 * set the tiling flags on a buffer.
1140 void amdgpu_bo_get_tiling_flags(struct amdgpu_bo *bo, u64 *tiling_flags)
1142 struct amdgpu_bo_user *ubo;
1144 BUG_ON(bo->tbo.type == ttm_bo_type_kernel);
1145 dma_resv_assert_held(bo->tbo.base.resv);
1146 ubo = to_amdgpu_bo_user(bo);
1149 *tiling_flags = ubo->tiling_flags;
1153 * amdgpu_bo_set_metadata - set metadata
1154 * @bo: &amdgpu_bo buffer object
1155 * @metadata: new metadata
1156 * @metadata_size: size of the new metadata
1157 * @flags: flags of the new metadata
1159 * Sets buffer object's metadata, its size and flags.
1160 * Used via GEM ioctl.
1163 * 0 for success or a negative error code on failure.
1165 int amdgpu_bo_set_metadata(struct amdgpu_bo *bo, void *metadata,
1166 u32 metadata_size, uint64_t flags)
1168 struct amdgpu_bo_user *ubo;
1171 BUG_ON(bo->tbo.type == ttm_bo_type_kernel);
1172 ubo = to_amdgpu_bo_user(bo);
1173 if (!metadata_size) {
1174 if (ubo->metadata_size) {
1175 kfree(ubo->metadata);
1176 ubo->metadata = NULL;
1177 ubo->metadata_size = 0;
1182 if (metadata == NULL)
1185 buffer = kmemdup(metadata, metadata_size, GFP_KERNEL);
1189 kfree(ubo->metadata);
1190 ubo->metadata_flags = flags;
1191 ubo->metadata = buffer;
1192 ubo->metadata_size = metadata_size;
1198 * amdgpu_bo_get_metadata - get metadata
1199 * @bo: &amdgpu_bo buffer object
1200 * @buffer: returned metadata
1201 * @buffer_size: size of the buffer
1202 * @metadata_size: size of the returned metadata
1203 * @flags: flags of the returned metadata
1205 * Gets buffer object's metadata, its size and flags. buffer_size shall not be
1206 * less than metadata_size.
1207 * Used via GEM ioctl.
1210 * 0 for success or a negative error code on failure.
1212 int amdgpu_bo_get_metadata(struct amdgpu_bo *bo, void *buffer,
1213 size_t buffer_size, uint32_t *metadata_size,
1216 struct amdgpu_bo_user *ubo;
1218 if (!buffer && !metadata_size)
1221 BUG_ON(bo->tbo.type == ttm_bo_type_kernel);
1222 ubo = to_amdgpu_bo_user(bo);
1224 *metadata_size = ubo->metadata_size;
1227 if (buffer_size < ubo->metadata_size)
1230 if (ubo->metadata_size)
1231 memcpy(buffer, ubo->metadata, ubo->metadata_size);
1235 *flags = ubo->metadata_flags;
1241 * amdgpu_bo_move_notify - notification about a memory move
1242 * @bo: pointer to a buffer object
1243 * @evict: if this move is evicting the buffer from the graphics address space
1245 * Marks the corresponding &amdgpu_bo buffer object as invalid, also performs
1247 * TTM driver callback which is called when ttm moves a buffer.
1249 void amdgpu_bo_move_notify(struct ttm_buffer_object *bo, bool evict)
1251 struct amdgpu_device *adev = amdgpu_ttm_adev(bo->bdev);
1252 struct amdgpu_bo *abo;
1254 if (!amdgpu_bo_is_amdgpu_bo(bo))
1257 abo = ttm_to_amdgpu_bo(bo);
1258 amdgpu_vm_bo_invalidate(adev, abo, evict);
1260 amdgpu_bo_kunmap(abo);
1262 if (abo->tbo.base.dma_buf && !abo->tbo.base.import_attach &&
1263 bo->resource->mem_type != TTM_PL_SYSTEM)
1264 dma_buf_move_notify(abo->tbo.base.dma_buf);
1266 /* remember the eviction */
1268 atomic64_inc(&adev->num_evictions);
1271 void amdgpu_bo_get_memory(struct amdgpu_bo *bo,
1272 struct amdgpu_mem_stats *stats)
1274 struct amdgpu_device *adev = amdgpu_ttm_adev(bo->tbo.bdev);
1275 struct ttm_resource *res = bo->tbo.resource;
1276 uint64_t size = amdgpu_bo_size(bo);
1277 struct drm_gem_object *obj;
1278 unsigned int domain;
1281 /* Abort if the BO doesn't currently have a backing store */
1285 obj = &bo->tbo.base;
1286 shared = drm_gem_object_is_shared_for_memory_stats(obj);
1288 domain = amdgpu_mem_type_to_domain(res->mem_type);
1290 case AMDGPU_GEM_DOMAIN_VRAM:
1291 stats->vram += size;
1292 if (amdgpu_res_cpu_visible(adev, bo->tbo.resource))
1293 stats->visible_vram += size;
1295 stats->vram_shared += size;
1297 case AMDGPU_GEM_DOMAIN_GTT:
1300 stats->gtt_shared += size;
1302 case AMDGPU_GEM_DOMAIN_CPU:
1306 stats->cpu_shared += size;
1310 if (bo->preferred_domains & AMDGPU_GEM_DOMAIN_VRAM) {
1311 stats->requested_vram += size;
1312 if (bo->flags & AMDGPU_GEM_CREATE_CPU_ACCESS_REQUIRED)
1313 stats->requested_visible_vram += size;
1315 if (domain != AMDGPU_GEM_DOMAIN_VRAM) {
1316 stats->evicted_vram += size;
1317 if (bo->flags & AMDGPU_GEM_CREATE_CPU_ACCESS_REQUIRED)
1318 stats->evicted_visible_vram += size;
1320 } else if (bo->preferred_domains & AMDGPU_GEM_DOMAIN_GTT) {
1321 stats->requested_gtt += size;
1326 * amdgpu_bo_release_notify - notification about a BO being released
1327 * @bo: pointer to a buffer object
1329 * Wipes VRAM buffers whose contents should not be leaked before the
1330 * memory is released.
1332 void amdgpu_bo_release_notify(struct ttm_buffer_object *bo)
1334 struct amdgpu_device *adev = amdgpu_ttm_adev(bo->bdev);
1335 struct dma_fence *fence = NULL;
1336 struct amdgpu_bo *abo;
1339 if (!amdgpu_bo_is_amdgpu_bo(bo))
1342 abo = ttm_to_amdgpu_bo(bo);
1344 WARN_ON(abo->vm_bo);
1347 amdgpu_amdkfd_release_notify(abo);
1349 /* We only remove the fence if the resv has individualized. */
1350 WARN_ON_ONCE(bo->type == ttm_bo_type_kernel
1351 && bo->base.resv != &bo->base._resv);
1352 if (bo->base.resv == &bo->base._resv)
1353 amdgpu_amdkfd_remove_fence_on_pt_pd_bos(abo);
1355 if (!bo->resource || bo->resource->mem_type != TTM_PL_VRAM ||
1356 !(abo->flags & AMDGPU_GEM_CREATE_VRAM_WIPE_ON_RELEASE) ||
1357 adev->in_suspend || drm_dev_is_unplugged(adev_to_drm(adev)))
1360 if (WARN_ON_ONCE(!dma_resv_trylock(bo->base.resv)))
1363 r = amdgpu_fill_buffer(abo, AMDGPU_POISON, bo->base.resv, &fence, true);
1365 amdgpu_bo_fence(abo, fence, false);
1366 dma_fence_put(fence);
1369 dma_resv_unlock(bo->base.resv);
1373 * amdgpu_bo_fault_reserve_notify - notification about a memory fault
1374 * @bo: pointer to a buffer object
1376 * Notifies the driver we are taking a fault on this BO and have reserved it,
1377 * also performs bookkeeping.
1378 * TTM driver callback for dealing with vm faults.
1381 * 0 for success or a negative error code on failure.
1383 vm_fault_t amdgpu_bo_fault_reserve_notify(struct ttm_buffer_object *bo)
1385 struct amdgpu_device *adev = amdgpu_ttm_adev(bo->bdev);
1386 struct ttm_operation_ctx ctx = { false, false };
1387 struct amdgpu_bo *abo = ttm_to_amdgpu_bo(bo);
1390 /* Remember that this BO was accessed by the CPU */
1391 abo->flags |= AMDGPU_GEM_CREATE_CPU_ACCESS_REQUIRED;
1393 if (amdgpu_res_cpu_visible(adev, bo->resource))
1396 /* Can't move a pinned BO to visible VRAM */
1397 if (abo->tbo.pin_count > 0)
1398 return VM_FAULT_SIGBUS;
1400 /* hurrah the memory is not visible ! */
1401 atomic64_inc(&adev->num_vram_cpu_page_faults);
1402 amdgpu_bo_placement_from_domain(abo, AMDGPU_GEM_DOMAIN_VRAM |
1403 AMDGPU_GEM_DOMAIN_GTT);
1405 /* Avoid costly evictions; only set GTT as a busy placement */
1406 abo->placements[0].flags |= TTM_PL_FLAG_DESIRED;
1408 r = ttm_bo_validate(bo, &abo->placement, &ctx);
1409 if (unlikely(r == -EBUSY || r == -ERESTARTSYS))
1410 return VM_FAULT_NOPAGE;
1411 else if (unlikely(r))
1412 return VM_FAULT_SIGBUS;
1414 /* this should never happen */
1415 if (bo->resource->mem_type == TTM_PL_VRAM &&
1416 !amdgpu_res_cpu_visible(adev, bo->resource))
1417 return VM_FAULT_SIGBUS;
1419 ttm_bo_move_to_lru_tail_unlocked(bo);
1424 * amdgpu_bo_fence - add fence to buffer object
1426 * @bo: buffer object in question
1427 * @fence: fence to add
1428 * @shared: true if fence should be added shared
1431 void amdgpu_bo_fence(struct amdgpu_bo *bo, struct dma_fence *fence,
1434 struct dma_resv *resv = bo->tbo.base.resv;
1437 r = dma_resv_reserve_fences(resv, 1);
1439 /* As last resort on OOM we block for the fence */
1440 dma_fence_wait(fence, false);
1444 dma_resv_add_fence(resv, fence, shared ? DMA_RESV_USAGE_READ :
1445 DMA_RESV_USAGE_WRITE);
1449 * amdgpu_bo_sync_wait_resv - Wait for BO reservation fences
1451 * @adev: amdgpu device pointer
1452 * @resv: reservation object to sync to
1453 * @sync_mode: synchronization mode
1454 * @owner: fence owner
1455 * @intr: Whether the wait is interruptible
1457 * Extract the fences from the reservation object and waits for them to finish.
1460 * 0 on success, errno otherwise.
1462 int amdgpu_bo_sync_wait_resv(struct amdgpu_device *adev, struct dma_resv *resv,
1463 enum amdgpu_sync_mode sync_mode, void *owner,
1466 struct amdgpu_sync sync;
1469 amdgpu_sync_create(&sync);
1470 amdgpu_sync_resv(adev, &sync, resv, sync_mode, owner);
1471 r = amdgpu_sync_wait(&sync, intr);
1472 amdgpu_sync_free(&sync);
1477 * amdgpu_bo_sync_wait - Wrapper for amdgpu_bo_sync_wait_resv
1478 * @bo: buffer object to wait for
1479 * @owner: fence owner
1480 * @intr: Whether the wait is interruptible
1482 * Wrapper to wait for fences in a BO.
1484 * 0 on success, errno otherwise.
1486 int amdgpu_bo_sync_wait(struct amdgpu_bo *bo, void *owner, bool intr)
1488 struct amdgpu_device *adev = amdgpu_ttm_adev(bo->tbo.bdev);
1490 return amdgpu_bo_sync_wait_resv(adev, bo->tbo.base.resv,
1491 AMDGPU_SYNC_NE_OWNER, owner, intr);
1495 * amdgpu_bo_gpu_offset - return GPU offset of bo
1496 * @bo: amdgpu object for which we query the offset
1498 * Note: object should either be pinned or reserved when calling this
1499 * function, it might be useful to add check for this for debugging.
1502 * current GPU offset of the object.
1504 u64 amdgpu_bo_gpu_offset(struct amdgpu_bo *bo)
1506 WARN_ON_ONCE(bo->tbo.resource->mem_type == TTM_PL_SYSTEM);
1507 WARN_ON_ONCE(!dma_resv_is_locked(bo->tbo.base.resv) &&
1508 !bo->tbo.pin_count && bo->tbo.type != ttm_bo_type_kernel);
1509 WARN_ON_ONCE(bo->tbo.resource->start == AMDGPU_BO_INVALID_OFFSET);
1510 WARN_ON_ONCE(bo->tbo.resource->mem_type == TTM_PL_VRAM &&
1511 !(bo->flags & AMDGPU_GEM_CREATE_VRAM_CONTIGUOUS));
1513 return amdgpu_bo_gpu_offset_no_check(bo);
1517 * amdgpu_bo_gpu_offset_no_check - return GPU offset of bo
1518 * @bo: amdgpu object for which we query the offset
1521 * current GPU offset of the object without raising warnings.
1523 u64 amdgpu_bo_gpu_offset_no_check(struct amdgpu_bo *bo)
1525 struct amdgpu_device *adev = amdgpu_ttm_adev(bo->tbo.bdev);
1526 uint64_t offset = AMDGPU_BO_INVALID_OFFSET;
1528 if (bo->tbo.resource->mem_type == TTM_PL_TT)
1529 offset = amdgpu_gmc_agp_addr(&bo->tbo);
1531 if (offset == AMDGPU_BO_INVALID_OFFSET)
1532 offset = (bo->tbo.resource->start << PAGE_SHIFT) +
1533 amdgpu_ttm_domain_start(adev, bo->tbo.resource->mem_type);
1535 return amdgpu_gmc_sign_extend(offset);
1539 * amdgpu_bo_get_preferred_domain - get preferred domain
1540 * @adev: amdgpu device object
1541 * @domain: allowed :ref:`memory domains <amdgpu_memory_domains>`
1544 * Which of the allowed domains is preferred for allocating the BO.
1546 uint32_t amdgpu_bo_get_preferred_domain(struct amdgpu_device *adev,
1549 if ((domain == (AMDGPU_GEM_DOMAIN_VRAM | AMDGPU_GEM_DOMAIN_GTT)) &&
1550 ((adev->asic_type == CHIP_CARRIZO) || (adev->asic_type == CHIP_STONEY))) {
1551 domain = AMDGPU_GEM_DOMAIN_VRAM;
1552 if (adev->gmc.real_vram_size <= AMDGPU_SG_THRESHOLD)
1553 domain = AMDGPU_GEM_DOMAIN_GTT;
1558 #if defined(CONFIG_DEBUG_FS)
1559 #define amdgpu_bo_print_flag(m, bo, flag) \
1561 if (bo->flags & (AMDGPU_GEM_CREATE_ ## flag)) { \
1562 seq_printf((m), " " #flag); \
1567 * amdgpu_bo_print_info - print BO info in debugfs file
1569 * @id: Index or Id of the BO
1570 * @bo: Requested BO for printing info
1573 * Print BO information in debugfs file
1576 * Size of the BO in bytes.
1578 u64 amdgpu_bo_print_info(int id, struct amdgpu_bo *bo, struct seq_file *m)
1580 struct amdgpu_device *adev = amdgpu_ttm_adev(bo->tbo.bdev);
1581 struct dma_buf_attachment *attachment;
1582 struct dma_buf *dma_buf;
1583 const char *placement;
1584 unsigned int pin_count;
1587 if (dma_resv_trylock(bo->tbo.base.resv)) {
1588 unsigned int domain;
1590 domain = amdgpu_mem_type_to_domain(bo->tbo.resource->mem_type);
1592 case AMDGPU_GEM_DOMAIN_VRAM:
1593 if (amdgpu_res_cpu_visible(adev, bo->tbo.resource))
1594 placement = "VRAM VISIBLE";
1598 case AMDGPU_GEM_DOMAIN_GTT:
1601 case AMDGPU_GEM_DOMAIN_CPU:
1606 dma_resv_unlock(bo->tbo.base.resv);
1608 placement = "UNKNOWN";
1611 size = amdgpu_bo_size(bo);
1612 seq_printf(m, "\t\t0x%08x: %12lld byte %s",
1613 id, size, placement);
1615 pin_count = READ_ONCE(bo->tbo.pin_count);
1617 seq_printf(m, " pin count %d", pin_count);
1619 dma_buf = READ_ONCE(bo->tbo.base.dma_buf);
1620 attachment = READ_ONCE(bo->tbo.base.import_attach);
1623 seq_printf(m, " imported from ino:%lu", file_inode(dma_buf->file)->i_ino);
1625 seq_printf(m, " exported as ino:%lu", file_inode(dma_buf->file)->i_ino);
1627 amdgpu_bo_print_flag(m, bo, CPU_ACCESS_REQUIRED);
1628 amdgpu_bo_print_flag(m, bo, NO_CPU_ACCESS);
1629 amdgpu_bo_print_flag(m, bo, CPU_GTT_USWC);
1630 amdgpu_bo_print_flag(m, bo, VRAM_CLEARED);
1631 amdgpu_bo_print_flag(m, bo, VRAM_CONTIGUOUS);
1632 amdgpu_bo_print_flag(m, bo, VM_ALWAYS_VALID);
1633 amdgpu_bo_print_flag(m, bo, EXPLICIT_SYNC);