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drm/amdgpu: add new helper for in kernel allocations 

We often allocate, pin and map things at the same time in the kernel.

Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Chunming Zhou <david1.zhou@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Christian König 2015-12-14 13:18:01 +01:00 committed by Alex Deucher
parent 81e04e1809
commit 7c204889de
2 changed files with 67 additions and 0 deletions
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63
drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
View File

@ -211,6 +211,69 @@ static void amdgpu_fill_placement_to_bo(struct amdgpu_bo *bo,
bo->placement.busy_placement = bo->placements;
}
/**
* amdgpu_bo_create_kernel - create BO for kernel use
*
* @adev: amdgpu device object
* @size: size for the new BO
* @align: alignment for the new BO
* @domain: where to place it
* @bo_ptr: resulting BO
* @gpu_addr: GPU addr of the pinned BO
* @cpu_addr: optional CPU address mapping
*
* Allocates and pins a BO for kernel internal use.
*
* Returns 0 on success, negative error code otherwise.
*/
int amdgpu_bo_create_kernel(struct amdgpu_device *adev,
unsigned long size, int align,
u32 domain, struct amdgpu_bo **bo_ptr,
u64 *gpu_addr, void **cpu_addr)
{
int r;
r = amdgpu_bo_create(adev, size, align, true, domain,
AMDGPU_GEM_CREATE_CPU_ACCESS_REQUIRED,
NULL, NULL, bo_ptr);
if (r) {
dev_err(adev->dev, "(%d) failed to allocate kernel bo\n", r);
return r;
}
r = amdgpu_bo_reserve(*bo_ptr, false);
if (r) {
dev_err(adev->dev, "(%d) failed to reserve kernel bo\n", r);
goto error_free;
}
r = amdgpu_bo_pin(*bo_ptr, domain, gpu_addr);
if (r) {
dev_err(adev->dev, "(%d) kernel bo pin failed\n", r);
goto error_unreserve;
}
if (cpu_addr) {
r = amdgpu_bo_kmap(*bo_ptr, cpu_addr);
if (r) {
dev_err(adev->dev, "(%d) kernel bo map failed\n", r);
goto error_unreserve;
}
}
amdgpu_bo_unreserve(*bo_ptr);
return 0;
error_unreserve:
amdgpu_bo_unreserve(*bo_ptr);
error_free:
amdgpu_bo_unref(bo_ptr);
return r;
}
int amdgpu_bo_create_restricted(struct amdgpu_device *adev,
unsigned long size, int byte_align,
bool kernel, u32 domain, u64 flags,

4
drivers/gpu/drm/amd/amdgpu/amdgpu_object.h
View File

@ -139,6 +139,10 @@ int amdgpu_bo_create_restricted(struct amdgpu_device *adev,
struct ttm_placement *placement,
struct reservation_object *resv,
struct amdgpu_bo **bo_ptr);
int amdgpu_bo_create_kernel(struct amdgpu_device *adev,
unsigned long size, int align,
u32 domain, struct amdgpu_bo **bo_ptr,
u64 *gpu_addr, void **cpu_addr);
int amdgpu_bo_kmap(struct amdgpu_bo *bo, void **ptr);
void amdgpu_bo_kunmap(struct amdgpu_bo *bo);
struct amdgpu_bo *amdgpu_bo_ref(struct amdgpu_bo *bo);