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 <david1.zhou at amd.com>
Cc: felix.kuehling at amd.com
---
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
