[PATCH] drm/amdgpu: revert "generally allow over-commit during BO allocation"

[Christian König]

This reverts commit 4ec11490081bcbc4b90d20622cd211c6eba8d6fc.

This causes problem for KFD because when we overcommit we accidentially
bind the BO to GTT for moving it into VRAM. We also need to make sure
that this is done only as fallback after trying to evict first.

Signed-off-by: Christian König <christian.koenig at amd.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c    | 16 +++++++++++++---
 drivers/gpu/drm/amd/amdgpu/amdgpu_object.c |  6 +++++-
 2 files changed, 18 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c
index 62e98f1ad770..a0780a4e3e61 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c
@@ -113,7 +113,7 @@ int amdgpu_gem_object_create(struct amdgpu_device *adev, unsigned long size,
 	bp.resv = resv;
 	bp.preferred_domain = initial_domain;
 	bp.flags = flags;
-	bp.domain = initial_domain | AMDGPU_GEM_DOMAIN_CPU;
+	bp.domain = initial_domain;
 	bp.bo_ptr_size = sizeof(struct amdgpu_bo);
 
 	r = amdgpu_bo_create_user(adev, &bp, &ubo);
@@ -332,10 +332,20 @@ int amdgpu_gem_create_ioctl(struct drm_device *dev, void *data,
 	}
 
 	initial_domain = (u32)(0xffffffff & args->in.domains);
+retry:
 	r = amdgpu_gem_object_create(adev, size, args->in.alignment,
-				     initial_domain, flags, ttm_bo_type_device,
-				     resv, &gobj);
+				     initial_domain,
+				     flags, ttm_bo_type_device, resv, &gobj);
 	if (r && r != -ERESTARTSYS) {
+		if (flags & AMDGPU_GEM_CREATE_CPU_ACCESS_REQUIRED) {
+			flags &= ~AMDGPU_GEM_CREATE_CPU_ACCESS_REQUIRED;
+			goto retry;
+		}
+
+		if (initial_domain == AMDGPU_GEM_DOMAIN_VRAM) {
+			initial_domain |= AMDGPU_GEM_DOMAIN_GTT;
+			goto retry;
+		}
 		DRM_DEBUG("Failed to allocate GEM object (%llu, %d, %llu, %d)\n",
 				size, initial_domain, args->in.alignment, r);
 	}
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
index fd3ab4b5e5bb..871f7c136de5 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
@@ -582,7 +582,11 @@ int amdgpu_bo_create(struct amdgpu_device *adev,
 		bo->flags |= AMDGPU_GEM_CREATE_VRAM_WIPE_ON_RELEASE;
 
 	bo->tbo.bdev = &adev->mman.bdev;
-	amdgpu_bo_placement_from_domain(bo, bp->domain);
+	if (bp->domain & (AMDGPU_GEM_DOMAIN_GWS | AMDGPU_GEM_DOMAIN_OA |
+			  AMDGPU_GEM_DOMAIN_GDS))
+		amdgpu_bo_placement_from_domain(bo, AMDGPU_GEM_DOMAIN_CPU);
+	else
+		amdgpu_bo_placement_from_domain(bo, bp->domain);
 	if (bp->type == ttm_bo_type_kernel)
 		bo->tbo.priority = 1;
 
-- 
2.34.1