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drm/radeon: clear the page directory using the DMA 

Signed-off-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Christian König 2013-10-29 20:14:51 +01:00 committed by Alex Deucher
parent 5b2906ecf4
commit db96bd2586
1 changed files with 29 additions and 5 deletions
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34
drivers/gpu/drm/radeon/radeon_gart.c
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@ -607,8 +607,8 @@ static int radeon_vm_evict(struct radeon_device *rdev, struct radeon_vm *vm)
*/
int radeon_vm_alloc_pt(struct radeon_device *rdev, struct radeon_vm *vm)
{
unsigned pd_size, pts_size;
u64 *pd_addr;
unsigned pd_size, pd_entries, pts_size;
struct radeon_ib ib;
int r;
if (vm == NULL) {
@ -619,8 +619,10 @@ int radeon_vm_alloc_pt(struct radeon_device *rdev, struct radeon_vm *vm)
return 0;
}
retry:
pd_size = radeon_vm_directory_size(rdev);
pd_entries = radeon_vm_num_pdes(rdev);
retry:
r = radeon_sa_bo_new(rdev, &rdev->vm_manager.sa_manager,
&vm->page_directory, pd_size,
RADEON_VM_PTB_ALIGN_SIZE, false);
@ -637,9 +639,31 @@ retry:
vm->pd_gpu_addr = radeon_sa_bo_gpu_addr(vm->page_directory);
/* Initially clear the page directory */
pd_addr = radeon_sa_bo_cpu_addr(vm->page_directory);
memset(pd_addr, 0, pd_size);
r = radeon_ib_get(rdev, R600_RING_TYPE_DMA_INDEX, &ib,
NULL, pd_entries * 2 + 64);
if (r) {
radeon_sa_bo_free(rdev, &vm->page_directory, vm->fence);
return r;
}
ib.length_dw = 0;
radeon_asic_vm_set_page(rdev, &ib, vm->pd_gpu_addr,
0, pd_entries, 0, 0);
radeon_ib_sync_to(&ib, vm->fence);
r = radeon_ib_schedule(rdev, &ib, NULL);
if (r) {
radeon_ib_free(rdev, &ib);
radeon_sa_bo_free(rdev, &vm->page_directory, vm->fence);
return r;
}
radeon_fence_unref(&vm->fence);
vm->fence = radeon_fence_ref(ib.fence);
radeon_ib_free(rdev, &ib);
radeon_fence_unref(&vm->last_flush);
/* allocate page table array */
pts_size = radeon_vm_num_pdes(rdev) * sizeof(struct radeon_sa_bo *);
vm->page_tables = kzalloc(pts_size, GFP_KERNEL);