From: "Michel Dänzer" <michel@daenzer.net>
To: dri-devel@lists.freedesktop.org
Subject: [PATCH] drm/amdgpu: Don't move pinned BOs
Date: Mon, 28 Mar 2016 12:53:02 +0900 [thread overview]
Message-ID: <1459137182-7888-1-git-send-email-michel@daenzer.net> (raw)
From: Michel Dänzer <michel.daenzer@amd.com>
The purpose of pinning is to prevent a buffer from moving.
Reviewed-by: Christian König <christian.koenig@amd.com>
Tested-by: Rex Zhu <Rex.Zhu@amd.com>
Signed-off-by: Michel Dänzer <michel.daenzer@amd.com>
---
drivers/gpu/drm/amd/amdgpu/amdgpu_object.c | 4 ++++
drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c | 6 ++++++
2 files changed, 10 insertions(+)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
index 151a2d4..56d1458 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
@@ -608,6 +608,10 @@ int amdgpu_bo_fault_reserve_notify(struct ttm_buffer_object *bo)
if ((offset + size) <= adev->mc.visible_vram_size)
return 0;
+ /* Can't move a pinned BO to visible VRAM */
+ if (abo->pin_count > 0)
+ return -EINVAL;
+
/* hurrah the memory is not visible ! */
amdgpu_ttm_placement_from_domain(abo, AMDGPU_GEM_DOMAIN_VRAM);
lpfn = adev->mc.visible_vram_size >> PAGE_SHIFT;
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
index 0f42b1a..9d3341d 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
@@ -384,9 +384,15 @@ static int amdgpu_bo_move(struct ttm_buffer_object *bo,
struct ttm_mem_reg *new_mem)
{
struct amdgpu_device *adev;
+ struct amdgpu_bo *abo;
struct ttm_mem_reg *old_mem = &bo->mem;
int r;
+ /* Can't move a pinned BO */
+ abo = container_of(bo, struct amdgpu_bo, tbo);
+ if (WARN_ON_ONCE(abo->pin_count > 0))
+ return -EINVAL;
+
adev = amdgpu_get_adev(bo->bdev);
if (old_mem->mem_type == TTM_PL_SYSTEM && bo->ttm == NULL) {
amdgpu_move_null(bo, new_mem);
--
2.8.0.rc3
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next reply other threads:[~2016-03-28 3:53 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-03-28 3:53 Michel Dänzer [this message]
2016-03-28 14:33 ` [PATCH] drm/amdgpu: Don't move pinned BOs Christian König
2016-03-28 15:56 ` Alex Deucher
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