git/linux-cryptodev-2.6
1
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/herbert/cryptodev-2.6.git synced 2026-04-19 20:13:49 -04:00
Code Issues Packages Projects Releases Wiki Activity

drm/amdgpu: stop using TTMs fault callback

Browse Source 
Implement the fault handler ourself using the provided TTM functions.

Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Dave Airlie <airlied@redhat.com>
Link: https://patchwork.freedesktop.org/patch/392324/
This commit is contained in:
Christian König
2020-09-25 15:21:49 +02:00
parent 8e0310f0ff
commit d3ef581afa
3 changed files with 46 additions and 16 deletions
Download Patch File Download Diff File Expand all files Collapse all files

20
drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
View File

@@ -1341,19 +1341,14 @@ void amdgpu_bo_release_notify(struct ttm_buffer_object *bo)
* Returns:
* 0 for success or a negative error code on failure.
*/
int amdgpu_bo_fault_reserve_notify(struct ttm_buffer_object *bo)
vm_fault_t amdgpu_bo_fault_reserve_notify(struct ttm_buffer_object *bo)
{
struct amdgpu_device *adev = amdgpu_ttm_adev(bo->bdev);
struct ttm_operation_ctx ctx = { false, false };
struct amdgpu_bo *abo;
struct amdgpu_bo *abo = ttm_to_amdgpu_bo(bo);
unsigned long offset, size;
int r;
if (!amdgpu_bo_is_amdgpu_bo(bo))
return 0;
abo = ttm_to_amdgpu_bo(bo);
/* Remember that this BO was accessed by the CPU */
abo->flags |= AMDGPU_GEM_CREATE_CPU_ACCESS_REQUIRED;
@@ -1367,7 +1362,7 @@ int amdgpu_bo_fault_reserve_notify(struct ttm_buffer_object *bo)
/* Can't move a pinned BO to visible VRAM */
if (abo->tbo.pin_count > 0)
return -EINVAL;
return VM_FAULT_SIGBUS;
/* hurrah the memory is not visible ! */
atomic64_inc(&adev->num_vram_cpu_page_faults);
@@ -1379,15 +1374,18 @@ int amdgpu_bo_fault_reserve_notify(struct ttm_buffer_object *bo)
abo->placement.busy_placement = &abo->placements[1];
r = ttm_bo_validate(bo, &abo->placement, &ctx);
if (unlikely(r != 0))
return r;
if (unlikely(r == -EBUSY || r == -ERESTARTSYS))
return VM_FAULT_NOPAGE;
else if (unlikely(r))
return VM_FAULT_SIGBUS;
offset = bo->mem.start << PAGE_SHIFT;
/* this should never happen */
if (bo->mem.mem_type == TTM_PL_VRAM &&
(offset + size) > adev->gmc.visible_vram_size)
return -EINVAL;
return VM_FAULT_SIGBUS;
ttm_bo_move_to_lru_tail_unlocked(bo);
return 0;
}