From: Chunming Zhou <david1.zhou@amd.com>
Date: Tue, 17 Apr 2018 11:52:53 +0800
Subject: drm/amdgpu: set preferred_domain independent of fallback handling
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Git-commit: aa2b2e2822831d78a283edb12cf8b7da21bdd0ed
Patch-mainline: v4.18-rc1
References: FATE#326289 FATE#326079 FATE#326049 FATE#322398 FATE#326166

When GEM needs to fallback to GTT for VRAM BOs we still want the
preferred domain to be untouched so that the BO has a cance to move back
to VRAM in the future.

Signed-off-by: Chunming Zhou <david1.zhou@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Acked-by: Petr Tesarik <ptesarik@suse.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c    |    1 +
 drivers/gpu/drm/amd/amdgpu/amdgpu_object.c |   15 +++++++++------
 drivers/gpu/drm/amd/amdgpu/amdgpu_object.h |    1 +
 3 files changed, 11 insertions(+), 6 deletions(-)

--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c
@@ -62,6 +62,7 @@ int amdgpu_gem_object_create(struct amdg
 	bp.byte_align = alignment;
 	bp.type = type;
 	bp.resv = resv;
+	bp.preferred_domain = initial_domain;
 retry:
 	bp.flags = flags;
 	bp.domain = initial_domain;
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
@@ -360,6 +360,7 @@ static int amdgpu_bo_do_create(struct am
 	};
 	struct amdgpu_bo *bo;
 	unsigned long page_align, size = bp->size;
+	u32 preferred_domains;
 	size_t acc_size;
 	int r;
 
@@ -380,12 +381,14 @@ static int amdgpu_bo_do_create(struct am
 	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 = bp->domain & (AMDGPU_GEM_DOMAIN_VRAM |
-					      AMDGPU_GEM_DOMAIN_GTT |
-					      AMDGPU_GEM_DOMAIN_CPU |
-					      AMDGPU_GEM_DOMAIN_GDS |
-					      AMDGPU_GEM_DOMAIN_GWS |
-					      AMDGPU_GEM_DOMAIN_OA);
+	preferred_domains = bp->preferred_domain ? bp->preferred_domain :
+		bp->domain;
+	bo->preferred_domains = preferred_domains & (AMDGPU_GEM_DOMAIN_VRAM |
+						     AMDGPU_GEM_DOMAIN_GTT |
+						     AMDGPU_GEM_DOMAIN_CPU |
+						     AMDGPU_GEM_DOMAIN_GDS |
+						     AMDGPU_GEM_DOMAIN_GWS |
+						     AMDGPU_GEM_DOMAIN_OA);
 	bo->allowed_domains = bo->preferred_domains;
 	if (bp->type != ttm_bo_type_kernel &&
 	    bo->allowed_domains == AMDGPU_GEM_DOMAIN_VRAM)
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.h
@@ -37,6 +37,7 @@ struct amdgpu_bo_param {
 	unsigned long			size;
 	int				byte_align;
 	u32				domain;
+	u32				preferred_domain;
 	u64				flags;
 	enum ttm_bo_type		type;
 	struct reservation_object	*resv;