user cases: 1. KFD wraps amdgpu_bo_create, they have no fallback case which is different with amdgpu_gem_object_create. since upstream branch has no amdgpu_amdkfd_gpuvm.c, which need KFD guys add this flag to __alloc_memory_of_gpu: + flags |= AMDGPU_GEM_CREATE_NO_FALLBACK; 2. UMD can specify this flag for their allocation as well if they like.
Change-Id: Id3ac1a0bdd48633328d0b22c4c057fab4e94d0b3 Signed-off-by: Chunming Zhou <[email protected]> Cc: [email protected] --- drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c | 3 ++- drivers/gpu/drm/amd/amdgpu/amdgpu_object.c | 3 ++- include/uapi/drm/amdgpu_drm.h | 2 ++ 3 files changed, 6 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c index dc34b50e6b29..d7d7ce1507ec 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c @@ -386,7 +386,8 @@ static int amdgpu_cs_bo_validate(struct amdgpu_cs_parser *p, bo->tbo.mem.start < adev->gmc.visible_vram_size >> PAGE_SHIFT) p->bytes_moved_vis += ctx.bytes_moved; - if (unlikely(r == -ENOMEM) && domain != bo->allowed_domains) { + if (unlikely(r == -ENOMEM) && domain != bo->allowed_domains && + !(bo->flags & AMDGPU_GEM_CREATE_NO_FALLBACK)) { domain = bo->allowed_domains; goto retry; } diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c index f04bfab1eebd..c70d745073b8 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c @@ -420,7 +420,8 @@ static int amdgpu_bo_do_create(struct amdgpu_device *adev, unsigned long size, r = ttm_bo_init_reserved(&adev->mman.bdev, &bo->tbo, size, type, &bo->placement, page_align, &ctx, acc_size, NULL, resv, &amdgpu_ttm_bo_destroy); - if (unlikely(r && r != -ERESTARTSYS) && type == ttm_bo_type_device) { + if (unlikely(r && r != -ERESTARTSYS) && type == ttm_bo_type_device && + !(flags & AMDGPU_GEM_CREATE_NO_FALLBACK)) { if (flags & AMDGPU_GEM_CREATE_CPU_ACCESS_REQUIRED) { flags &= ~AMDGPU_GEM_CREATE_CPU_ACCESS_REQUIRED; goto retry; diff --git a/include/uapi/drm/amdgpu_drm.h b/include/uapi/drm/amdgpu_drm.h index 0087799962cf..80665715e651 100644 --- a/include/uapi/drm/amdgpu_drm.h +++ b/include/uapi/drm/amdgpu_drm.h @@ -98,6 +98,8 @@ extern "C" { #define AMDGPU_GEM_CREATE_VM_ALWAYS_VALID (1 << 6) /* Flag that BO sharing will be explicitly synchronized */ #define AMDGPU_GEM_CREATE_EXPLICIT_SYNC (1 << 7) +/* Flag that BO doesn't need fallback */ +#define AMDGPU_GEM_CREATE_NO_FALLBACK (1 << 8) struct drm_amdgpu_gem_create_in { /** the requested memory size */ -- 2.14.1 _______________________________________________ amd-gfx mailing list [email protected] https://lists.freedesktop.org/mailman/listinfo/amd-gfx
