From: Chunming Zhou <david1.zhou@amd.com>
Date: Mon, 2 Apr 2018 11:20:44 +0800
Subject: drm/amdgpu: add new bo flag that indicates BOs don't need fallback
(v2)
Git-commit: 552825b28ddac200b6080d9e79f4121b68e1517d
Patch-mainline: v4.18-rc1
References: FATE#326289 FATE#326079 FATE#326049 FATE#322398 FATE#326166
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.
v2: squash in merge conflict fix (Chunming)
Signed-off-by: Chunming Zhou <david1.zhou@amd.com>
Acked-by: Felix Kuehling <Felix.Kuehling@amd.com>
Cc: felix.kuehling@amd.com
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Acked-by: Petr Tesarik <ptesarik@suse.com>
---
drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c | 3 ++-
drivers/gpu/drm/amd/amdgpu/amdgpu_object.c | 5 ++++-
include/uapi/drm/amdgpu_drm.h | 2 ++
3 files changed, 8 insertions(+), 2 deletions(-)
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c
@@ -386,7 +386,8 @@ retry:
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;
}
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
@@ -388,6 +388,8 @@ retry:
drm_gem_private_object_init(adev->ddev, &bo->gem_base, size);
INIT_LIST_HEAD(&bo->shadow_list);
INIT_LIST_HEAD(&bo->va);
+ bo->preferred_domains = preferred_domains;
+ bo->allowed_domains = allowed_domains;
bo->flags = flags;
@@ -424,7 +426,8 @@ retry:
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;
--- a/include/uapi/drm/amdgpu_drm.h
+++ b/include/uapi/drm/amdgpu_drm.h
@@ -95,6 +95,8 @@ 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 */