mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-16 06:57:04 +07:00
drm/tegra: prime: Implement ->{begin,end}_cpu_access()
These callbacks allow the exporter to swap in and pin the backing storage for buffers as well as invalidate the cache in preparation for accessing the buffer from the CPU, and flush the cache and unpin the backing storage when the CPU is done modifying the buffer. Signed-off-by: Thierry Reding <treding@nvidia.com>
This commit is contained in:
parent
bd43c9f0fa
commit
27e92f1f16
@ -568,6 +568,34 @@ static void tegra_gem_prime_release(struct dma_buf *buf)
|
||||
drm_gem_dmabuf_release(buf);
|
||||
}
|
||||
|
||||
static int tegra_gem_prime_begin_cpu_access(struct dma_buf *buf,
|
||||
enum dma_data_direction direction)
|
||||
{
|
||||
struct drm_gem_object *gem = buf->priv;
|
||||
struct tegra_bo *bo = to_tegra_bo(gem);
|
||||
struct drm_device *drm = gem->dev;
|
||||
|
||||
if (bo->pages)
|
||||
dma_sync_sg_for_cpu(drm->dev, bo->sgt->sgl, bo->sgt->nents,
|
||||
DMA_FROM_DEVICE);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int tegra_gem_prime_end_cpu_access(struct dma_buf *buf,
|
||||
enum dma_data_direction direction)
|
||||
{
|
||||
struct drm_gem_object *gem = buf->priv;
|
||||
struct tegra_bo *bo = to_tegra_bo(gem);
|
||||
struct drm_device *drm = gem->dev;
|
||||
|
||||
if (bo->pages)
|
||||
dma_sync_sg_for_device(drm->dev, bo->sgt->sgl, bo->sgt->nents,
|
||||
DMA_TO_DEVICE);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void *tegra_gem_prime_kmap_atomic(struct dma_buf *buf,
|
||||
unsigned long page)
|
||||
{
|
||||
@ -618,6 +646,8 @@ static const struct dma_buf_ops tegra_gem_prime_dmabuf_ops = {
|
||||
.map_dma_buf = tegra_gem_prime_map_dma_buf,
|
||||
.unmap_dma_buf = tegra_gem_prime_unmap_dma_buf,
|
||||
.release = tegra_gem_prime_release,
|
||||
.begin_cpu_access = tegra_gem_prime_begin_cpu_access,
|
||||
.end_cpu_access = tegra_gem_prime_end_cpu_access,
|
||||
.map_atomic = tegra_gem_prime_kmap_atomic,
|
||||
.unmap_atomic = tegra_gem_prime_kunmap_atomic,
|
||||
.map = tegra_gem_prime_kmap,
|
||||
|
Loading…
Reference in New Issue
Block a user