From: Michel Dänzer <michel.daenzer@xxxxxxx>
* Fix format of return value descriptions
* Document all parameters of amdgpu_bo_free_kernel
* Document amdgpu_bo_get_preferred_pin_domain
Signed-off-by: Michel Dänzer <michel.daenzer at amd.com>
---
drivers/gpu/drm/amd/amdgpu/amdgpu_object.c | 78 +++++++++++++++-------
1 file changed, 55 insertions(+), 23 deletions(-)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
index 78d75ae5932f..987a9fa33d35 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
@@ -93,7 +93,8 @@ static void amdgpu_ttm_bo_destroy(struct ttm_buffer_object *tbo)
* Uses destroy function associated with the object to determine if this is
* an &amdgpu_bo.
*
- * Returns true if the object belongs to &amdgpu_bo, false if not.
+ * Returns:
+ * true if the object belongs to &amdgpu_bo, false if not.
*/
bool amdgpu_ttm_bo_is_amdgpu_bo(struct ttm_buffer_object *bo)
{
@@ -214,7 +215,8 @@ void amdgpu_ttm_placement_from_domain(struct amdgpu_bo *abo, u32 domain)
*
* Note: For bo_ptr new BO is only created if bo_ptr points to NULL.
*
- * Returns 0 on success, negative error code otherwise.
+ * Returns:
+ * 0 on success, negative error code otherwise.
*/
int amdgpu_bo_create_reserved(struct amdgpu_device *adev,
unsigned long size, int align,
@@ -291,7 +293,8 @@ int amdgpu_bo_create_reserved(struct amdgpu_device *adev,
*
* Note: For bo_ptr new BO is only created if bo_ptr points to NULL.
*
- * Returns 0 on success, negative error code otherwise.
+ * Returns:
+ * 0 on success, negative error code otherwise.
*/
int amdgpu_bo_create_kernel(struct amdgpu_device *adev,
unsigned long size, int align,
@@ -315,6 +318,8 @@ int amdgpu_bo_create_kernel(struct amdgpu_device *adev,
* amdgpu_bo_free_kernel - free BO for kernel use
*
* @bo: amdgpu BO to free
+ * @gpu_addr: pointer to where the BO's GPU memory space address was stored
+ * @cpu_addr: pointer to where the BO's CPU memory space address was stored
*
* unmaps and unpin a BO for kernel internal use.
*/
@@ -539,7 +544,8 @@ static int amdgpu_bo_create_shadow(struct amdgpu_device *adev,
* Shadow object is used to backup the original buffer object, and is always
* in GTT.
*
- * Returns 0 for success or a negative error code on failure.
+ * Returns:
+ * 0 for success or a negative error code on failure.
*/
int amdgpu_bo_create(struct amdgpu_device *adev,
struct amdgpu_bo_param *bp,
@@ -582,7 +588,8 @@ int amdgpu_bo_create(struct amdgpu_device *adev,
* Copies an &amdgpu_bo buffer object to its shadow object.
* Not used for now.
*
- * Returns 0 for success or a negative error code on failure.
+ * Returns:
+ * 0 for success or a negative error code on failure.
*/
int amdgpu_bo_backup_to_shadow(struct amdgpu_device *adev,
struct amdgpu_ring *ring,
@@ -625,7 +632,8 @@ int amdgpu_bo_backup_to_shadow(struct amdgpu_device *adev,
* This is used for validating shadow bos. It calls ttm_bo_validate() to
* make sure the buffer is resident where it needs to be.
*
- * Returns 0 for success or a negative error code on failure.
+ * Returns:
+ * 0 for success or a negative error code on failure.
*/
int amdgpu_bo_validate(struct amdgpu_bo *bo)
{
@@ -662,7 +670,8 @@ int amdgpu_bo_validate(struct amdgpu_bo *bo)
* This is used for recovering a buffer from its shadow in case of a gpu
* reset where vram context may be lost.
*
- * Returns 0 for success or a negative error code on failure.
+ * Returns:
+ * 0 for success or a negative error code on failure.
*/
int amdgpu_bo_restore_from_shadow(struct amdgpu_device *adev,
struct amdgpu_ring *ring,
@@ -704,7 +713,8 @@ int amdgpu_bo_restore_from_shadow(struct amdgpu_device *adev,
* Calls ttm_bo_kmap() to set up the kernel virtual mapping; calls
* amdgpu_bo_kptr() to get the kernel virtual address.
*
- * Returns 0 for success or a negative error code on failure.
+ * Returns:
+ * 0 for success or a negative error code on failure.
*/
int amdgpu_bo_kmap(struct amdgpu_bo *bo, void **ptr)
{
@@ -742,7 +752,8 @@ int amdgpu_bo_kmap(struct amdgpu_bo *bo, void **ptr)
*
* Calls ttm_kmap_obj_virtual() to get the kernel virtual address
*
- * Returns the virtual address of a buffer object area.
+ * Returns:
+ * the virtual address of a buffer object area.
*/
void *amdgpu_bo_kptr(struct amdgpu_bo *bo)
{
@@ -769,7 +780,8 @@ void amdgpu_bo_kunmap(struct amdgpu_bo *bo)
*
* References the contained &ttm_buffer_object.
*
- * Returns a refcounted pointer to the &amdgpu_bo buffer object.
+ * Returns:
+ * a refcounted pointer to the &amdgpu_bo buffer object.
*/
struct amdgpu_bo *amdgpu_bo_ref(struct amdgpu_bo *bo)
{
@@ -819,7 +831,8 @@ void amdgpu_bo_unref(struct amdgpu_bo **bo)
* where to pin a buffer if there are specific restrictions on where a buffer
* must be located.
*
- * Returns 0 for success or a negative error code on failure.
+ * Returns:
+ * 0 for success or a negative error code on failure.
*/
int amdgpu_bo_pin_restricted(struct amdgpu_bo *bo, u32 domain,
u64 min_offset, u64 max_offset,
@@ -925,7 +938,8 @@ int amdgpu_bo_pin_restricted(struct amdgpu_bo *bo, u32 domain,
* Provides a simpler API for buffers that do not have any strict restrictions
* on where a buffer must be located.
*
- * Returns 0 for success or a negative error code on failure.
+ * Returns:
+ * 0 for success or a negative error code on failure.
*/
int amdgpu_bo_pin(struct amdgpu_bo *bo, u32 domain, u64 *gpu_addr)
{
@@ -939,7 +953,8 @@ int amdgpu_bo_pin(struct amdgpu_bo *bo, u32 domain, u64 *gpu_addr)
* Decreases the pin_count, and clears the flags if pin_count reaches 0.
* Changes placement and pin size accordingly.
*
- * Returns 0 for success or a negative error code on failure.
+ * Returns:
+ * 0 for success or a negative error code on failure.
*/
int amdgpu_bo_unpin(struct amdgpu_bo *bo)
{
@@ -983,7 +998,8 @@ int amdgpu_bo_unpin(struct amdgpu_bo *bo)
* Evicts all VRAM buffers on the lru list of the memory type.
* Mainly used for evicting vram at suspend time.
*
- * Returns 0 for success or a negative error code on failure.
+ * Returns:
+ * 0 for success or a negative error code on failure.
*/
int amdgpu_bo_evict_vram(struct amdgpu_device *adev)
{
@@ -1013,7 +1029,8 @@ static const char *amdgpu_vram_names[] = {
*
* Calls amdgpu_ttm_init() to initialize amdgpu memory manager.
*
- * Returns 0 for success or a negative error code on failure.
+ * Returns:
+ * 0 for success or a negative error code on failure.
*/
int amdgpu_bo_init(struct amdgpu_device *adev)
{
@@ -1039,7 +1056,8 @@ int amdgpu_bo_init(struct amdgpu_device *adev)
* Calls amdgpu_ttm_late_init() to free resources used earlier during
* initialization.
*
- * Returns 0 for success or a negative error code on failure.
+ * Returns:
+ * 0 for success or a negative error code on failure.
*/
int amdgpu_bo_late_init(struct amdgpu_device *adev)
{
@@ -1068,7 +1086,8 @@ void amdgpu_bo_fini(struct amdgpu_device *adev)
*
* Calls ttm_fbdev_mmap() to mmap fbdev memory if it is backed by a bo.
*
- * Returns 0 for success or a negative error code on failure.
+ * Returns:
+ * 0 for success or a negative error code on failure.
*/
int amdgpu_bo_fbdev_mmap(struct amdgpu_bo *bo,
struct vm_area_struct *vma)
@@ -1084,7 +1103,8 @@ int amdgpu_bo_fbdev_mmap(struct amdgpu_bo *bo,
* Sets buffer object's tiling flags with the new one. Used by GEM ioctl or
* kernel driver to set the tiling flags on a buffer.
*
- * Returns 0 for success or a negative error code on failure.
+ * Returns:
+ * 0 for success or a negative error code on failure.
*/
int amdgpu_bo_set_tiling_flags(struct amdgpu_bo *bo, u64 tiling_flags)
{
@@ -1124,7 +1144,8 @@ void amdgpu_bo_get_tiling_flags(struct amdgpu_bo *bo, u64 *tiling_flags)
* Sets buffer object's metadata, its size and flags.
* Used via GEM ioctl.
*
- * Returns 0 for success or a negative error code on failure.
+ * Returns:
+ * 0 for success or a negative error code on failure.
*/
int amdgpu_bo_set_metadata (struct amdgpu_bo *bo, void *metadata,
uint32_t metadata_size, uint64_t flags)
@@ -1167,7 +1188,8 @@ int amdgpu_bo_set_metadata (struct amdgpu_bo *bo, void *metadata,
* less than metadata_size.
* Used via GEM ioctl.
*
- * Returns 0 for success or a negative error code on failure.
+ * Returns:
+ * 0 for success or a negative error code on failure.
*/
int amdgpu_bo_get_metadata(struct amdgpu_bo *bo, void *buffer,
size_t buffer_size, uint32_t *metadata_size,
@@ -1238,7 +1260,8 @@ void amdgpu_bo_move_notify(struct ttm_buffer_object *bo,
* also performs bookkeeping.
* TTM driver callback for dealing with vm faults.
*
- * Returns 0 for success or a negative error code on failure.
+ * Returns:
+ * 0 for success or a negative error code on failure.
*/
int amdgpu_bo_fault_reserve_notify(struct ttm_buffer_object *bo)
{
@@ -1313,10 +1336,11 @@ void amdgpu_bo_fence(struct amdgpu_bo *bo, struct dma_fence *fence,
* amdgpu_bo_gpu_offset - return GPU offset of bo
* @bo: amdgpu object for which we query the offset
*
- * Returns current GPU offset of the object.
- *
* Note: object should either be pinned or reserved when calling this
* function, it might be useful to add check for this for debugging.
+ *
+ * Returns:
+ * current GPU offset of the object.
*/
u64 amdgpu_bo_gpu_offset(struct amdgpu_bo *bo)
{
@@ -1332,6 +1356,14 @@ u64 amdgpu_bo_gpu_offset(struct amdgpu_bo *bo)
return bo->tbo.offset;
}
+/**
+ * amdgpu_bo_get_preferred_pin_domain - get preferred domain for scanout
+ * @adev: amdgpu device object
+ * @domain: allowed :ref:`memory domains <amdgpu_memory_domains>`
+ *
+ * Returns:
+ * Which of the allowed domains is preferred for pinning the BO for scanout.
+ */
uint32_t amdgpu_bo_get_preferred_pin_domain(struct amdgpu_device *adev,
uint32_t domain)
{
--
2.17.0
