Am 24.01.23 um 11:12 schrieb Matthew Auld:
On Tue, 24 Jan 2023 at 09:51, Christian König
<ckoenig.leichtzumerken@xxxxxxxxx> wrote:
Am 11.01.23 um 14:17 schrieb Matthew Auld:
On Wed, 11 Jan 2023 at 11:43, Christian König
<ckoenig.leichtzumerken@xxxxxxxxx> wrote:
We have checks for this in the individual drivers move callback, but
it's probably better to generally forbit that on a higher level.
Also stops exporting ttm_resource_compat() since that's not necessary
any more after removing the extra checks in vmwgfx.
Signed-off-by: Christian König <christian.koenig@xxxxxxx>
---
drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c | 4 ----
drivers/gpu/drm/nouveau/nouveau_bo.c | 3 ---
drivers/gpu/drm/radeon/radeon_ttm.c | 4 ----
drivers/gpu/drm/ttm/ttm_bo.c | 20 ++++++++++++--------
drivers/gpu/drm/ttm/ttm_resource.c | 1 -
drivers/gpu/drm/vmwgfx/vmwgfx_bo.c | 19 ++-----------------
6 files changed, 14 insertions(+), 37 deletions(-)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
index 068c2d8495fd..677cd7d91687 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
@@ -466,11 +466,7 @@ static int amdgpu_bo_move(struct ttm_buffer_object *bo, bool evict,
return r;
}
- /* Can't move a pinned BO */
abo = ttm_to_amdgpu_bo(bo);
- if (WARN_ON_ONCE(abo->tbo.pin_count > 0))
- return -EINVAL;
-
adev = amdgpu_ttm_adev(bo->bdev);
if (!old_mem || (old_mem->mem_type == TTM_PL_SYSTEM &&
diff --git a/drivers/gpu/drm/nouveau/nouveau_bo.c b/drivers/gpu/drm/nouveau/nouveau_bo.c
index 288eebc70a67..c2ec91cc845d 100644
--- a/drivers/gpu/drm/nouveau/nouveau_bo.c
+++ b/drivers/gpu/drm/nouveau/nouveau_bo.c
@@ -1015,9 +1015,6 @@ nouveau_bo_move(struct ttm_buffer_object *bo, bool evict,
if (ret)
goto out_ntfy;
- if (nvbo->bo.pin_count)
- NV_WARN(drm, "Moving pinned object %p!\n", nvbo);
-
if (drm->client.device.info.family < NV_DEVICE_INFO_V0_TESLA) {
ret = nouveau_bo_vm_bind(bo, new_reg, &new_tile);
if (ret)
diff --git a/drivers/gpu/drm/radeon/radeon_ttm.c b/drivers/gpu/drm/radeon/radeon_ttm.c
index 1e8e287e113c..67075c85f847 100644
--- a/drivers/gpu/drm/radeon/radeon_ttm.c
+++ b/drivers/gpu/drm/radeon/radeon_ttm.c
@@ -211,11 +211,7 @@ static int radeon_bo_move(struct ttm_buffer_object *bo, bool evict,
if (r)
return r;
- /* Can't move a pinned BO */
rbo = container_of(bo, struct radeon_bo, tbo);
- if (WARN_ON_ONCE(rbo->tbo.pin_count > 0))
- return -EINVAL;
-
rdev = radeon_get_rdev(bo->bdev);
if (old_mem->mem_type == TTM_PL_SYSTEM && bo->ttm == NULL) {
ttm_bo_move_null(bo, new_mem);
diff --git a/drivers/gpu/drm/ttm/ttm_bo.c b/drivers/gpu/drm/ttm/ttm_bo.c
index 326a3d13a829..9baccb2f6e99 100644
--- a/drivers/gpu/drm/ttm/ttm_bo.c
+++ b/drivers/gpu/drm/ttm/ttm_bo.c
@@ -894,14 +894,18 @@ int ttm_bo_validate(struct ttm_buffer_object *bo,
if (!placement->num_placement && !placement->num_busy_placement)
return ttm_bo_pipeline_gutting(bo);
- /*
- * Check whether we need to move buffer.
- */
- if (!bo->resource || !ttm_resource_compat(bo->resource, placement)) {
- ret = ttm_bo_move_buffer(bo, placement, ctx);
- if (ret)
- return ret;
- }
+ /* Check whether we need to move buffer. */
+ if (bo->resource && ttm_resource_compat(bo->resource, placement))
+ return 0;
Note this now skips the tt create below (intentional?). I think i915
needed that, since it creates a dummy system resource initially for
all objects, and then relies on ZERO_ALLOC being set for certain
objects to know if the memory needs to be cleared or not when later
doing the dummy -> vram. Thoughts?
That's unproblematic. On initial allocation bo->resource is NULL so we
never branch out here.
Here is what I see in drm-tip, when first creating an object with ttm:
ttm_bo_init_reserved() -> ttm_resource_alloc(PL_SYSTEM, &bo->resource)
-> ttm_bo_validate()
So bo->resource is for sure not NULL on initial allocation, and is
pointing to PL_SYSTEM. And in i915 we initially stuff everything into
SYSTEM as a dummy placement.
IIRC you had a series that tried to address that (allowing NULL
resource or so), but it never landed:
https://patchwork.freedesktop.org/patch/500698/?series=107680&rev=2
Oh! My recollection was that this was done!
Sorry my memory failed me here, thanks for the notice.
Christian.
Christian.
+
+ /* Moving of pinned BOs is forbidden */
+ if (bo->pin_count)
+ return -EINVAL;
+
+ ret = ttm_bo_move_buffer(bo, placement, ctx);
+ if (ret)
+ return ret;
+
/*
* We might need to add a TTM.
*/
diff --git a/drivers/gpu/drm/ttm/ttm_resource.c b/drivers/gpu/drm/ttm/ttm_resource.c
index b8a826a24fb2..7333f7a87a2f 100644
--- a/drivers/gpu/drm/ttm/ttm_resource.c
+++ b/drivers/gpu/drm/ttm/ttm_resource.c
@@ -361,7 +361,6 @@ bool ttm_resource_compat(struct ttm_resource *res,
return false;
}
-EXPORT_SYMBOL(ttm_resource_compat);
void ttm_resource_set_bo(struct ttm_resource *res,
struct ttm_buffer_object *bo)
diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_bo.c b/drivers/gpu/drm/vmwgfx/vmwgfx_bo.c
index 321c551784a1..dbcef460c452 100644
--- a/drivers/gpu/drm/vmwgfx/vmwgfx_bo.c
+++ b/drivers/gpu/drm/vmwgfx/vmwgfx_bo.c
@@ -87,12 +87,7 @@ int vmw_bo_pin_in_placement(struct vmw_private *dev_priv,
if (unlikely(ret != 0))
goto err;
- if (buf->base.pin_count > 0)
- ret = ttm_resource_compat(bo->resource, placement)
- ? 0 : -EINVAL;
- else
- ret = ttm_bo_validate(bo, placement, &ctx);
-
+ ret = ttm_bo_validate(bo, placement, &ctx);
if (!ret)
vmw_bo_pin_reserved(buf, true);
@@ -128,12 +123,6 @@ int vmw_bo_pin_in_vram_or_gmr(struct vmw_private *dev_priv,
if (unlikely(ret != 0))
goto err;
- if (buf->base.pin_count > 0) {
- ret = ttm_resource_compat(bo->resource, &vmw_vram_gmr_placement)
- ? 0 : -EINVAL;
- goto out_unreserve;
- }
-
ret = ttm_bo_validate(bo, &vmw_vram_gmr_placement, &ctx);
if (likely(ret == 0) || ret == -ERESTARTSYS)
goto out_unreserve;
@@ -218,11 +207,7 @@ int vmw_bo_pin_in_start_of_vram(struct vmw_private *dev_priv,
(void) ttm_bo_validate(bo, &vmw_sys_placement, &ctx);
}
- if (buf->base.pin_count > 0)
- ret = ttm_resource_compat(bo->resource, &placement)
- ? 0 : -EINVAL;
- else
- ret = ttm_bo_validate(bo, &placement, &ctx);
+ ret = ttm_bo_validate(bo, &placement, &ctx);
/* For some reason we didn't end up at the start of vram */
WARN_ON(ret == 0 && bo->resource->start != 0);
--
2.34.1
