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path: root/drivers/gpu/drm/tegra/gem.c
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Diffstat (limited to 'drivers/gpu/drm/tegra/gem.c')
-rw-r--r--drivers/gpu/drm/tegra/gem.c69
1 files changed, 49 insertions, 20 deletions
diff --git a/drivers/gpu/drm/tegra/gem.c b/drivers/gpu/drm/tegra/gem.c
index 49b9bf28f872..8b0b4ff64bb4 100644
--- a/drivers/gpu/drm/tegra/gem.c
+++ b/drivers/gpu/drm/tegra/gem.c
@@ -203,6 +203,8 @@ free:
static void tegra_bo_free(struct drm_device *drm, struct tegra_bo *bo)
{
if (bo->pages) {
+ dma_unmap_sg(drm->dev, bo->sgt->sgl, bo->sgt->nents,
+ DMA_BIDIRECTIONAL);
drm_gem_put_pages(&bo->gem, bo->pages, true, true);
sg_free_table(bo->sgt);
kfree(bo->sgt);
@@ -213,8 +215,7 @@ static void tegra_bo_free(struct drm_device *drm, struct tegra_bo *bo)
static int tegra_bo_get_pages(struct drm_device *drm, struct tegra_bo *bo)
{
- struct scatterlist *s;
- unsigned int i;
+ int err;
bo->pages = drm_gem_get_pages(&bo->gem);
if (IS_ERR(bo->pages))
@@ -223,27 +224,26 @@ static int tegra_bo_get_pages(struct drm_device *drm, struct tegra_bo *bo)
bo->num_pages = bo->gem.size >> PAGE_SHIFT;
bo->sgt = drm_prime_pages_to_sg(bo->pages, bo->num_pages);
- if (IS_ERR(bo->sgt))
+ if (IS_ERR(bo->sgt)) {
+ err = PTR_ERR(bo->sgt);
goto put_pages;
+ }
- /*
- * Fake up the SG table so that dma_sync_sg_for_device() can be used
- * to flush the pages associated with it.
- *
- * TODO: Replace this by drm_clflash_sg() once it can be implemented
- * without relying on symbols that are not exported.
- */
- for_each_sg(bo->sgt->sgl, s, bo->sgt->nents, i)
- sg_dma_address(s) = sg_phys(s);
-
- dma_sync_sg_for_device(drm->dev, bo->sgt->sgl, bo->sgt->nents,
- DMA_TO_DEVICE);
+ err = dma_map_sg(drm->dev, bo->sgt->sgl, bo->sgt->nents,
+ DMA_BIDIRECTIONAL);
+ if (err == 0) {
+ err = -EFAULT;
+ goto free_sgt;
+ }
return 0;
+free_sgt:
+ sg_free_table(bo->sgt);
+ kfree(bo->sgt);
put_pages:
drm_gem_put_pages(&bo->gem, bo->pages, false, false);
- return PTR_ERR(bo->sgt);
+ return err;
}
static int tegra_bo_alloc(struct drm_device *drm, struct tegra_bo *bo)
@@ -459,8 +459,7 @@ const struct vm_operations_struct tegra_bo_vm_ops = {
.close = drm_gem_vm_close,
};
-static int tegra_gem_mmap(struct drm_gem_object *gem,
- struct vm_area_struct *vma)
+int __tegra_gem_mmap(struct drm_gem_object *gem, struct vm_area_struct *vma)
{
struct tegra_bo *bo = to_tegra_bo(gem);
@@ -507,7 +506,7 @@ int tegra_drm_mmap(struct file *file, struct vm_area_struct *vma)
gem = vma->vm_private_data;
- return tegra_gem_mmap(gem, vma);
+ return __tegra_gem_mmap(gem, vma);
}
static struct sg_table *
@@ -569,6 +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)
{
@@ -600,7 +627,7 @@ static int tegra_gem_prime_mmap(struct dma_buf *buf, struct vm_area_struct *vma)
if (err < 0)
return err;
- return tegra_gem_mmap(gem, vma);
+ return __tegra_gem_mmap(gem, vma);
}
static void *tegra_gem_prime_vmap(struct dma_buf *buf)
@@ -619,6 +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,