Implement kmap/kmap_atomic, kunmap/kunmap_atomic functions of dma_buf_ops.
Signed-off-by: Cooper Yuan <coopery...@gmail.com>
---
drivers/gpu/drm/exynos/exynos_drm_dmabuf.c | 17 +++++++++++------
1 files changed, 11 insertions(+), 6 deletions(-)
diff --git a/drivers/gpu/drm/exynos/exynos_drm_dmabuf.c
b/drivers/gpu/drm/exynos/exynos_drm_dmabuf.c
index 913a23e..805b344 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_dmabuf.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_dmabuf.c
@@ -138,30 +138,35 @@ static void exynos_dmabuf_release(struct dma_buf *dmabuf)
static void *exynos_gem_dmabuf_kmap_atomic(struct dma_buf *dma_buf,
unsigned long page_num)
{
- /* TODO */
+ struct exynos_drm_gem_obj *exynos_gem_obj = dma_buf->priv;
+ struct exynos_drm_gem_buf *buf = exynos_gem_obj->buffer;
- return NULL;
+ return kmap_atomic(buf->pages[page_num]);
}
static void exynos_gem_dmabuf_kunmap_atomic(struct dma_buf *dma_buf,
unsigned long page_num,
void *addr)
{
- /* TODO */
+ kunmap_atomic(addr);
}
static void *exynos_gem_dmabuf_kmap(struct dma_buf *dma_buf,
unsigned long page_num)
{
- /* TODO */
+ struct exynos_drm_gem_obj *exynos_gem_obj = dma_buf->priv;
+ struct exynos_drm_gem_buf *buf = exynos_gem_obj->buffer;
- return NULL;
+ return kmap(buf->pages[page_num]);
}
static void exynos_gem_dmabuf_kunmap(struct dma_buf *dma_buf,
unsigned long page_num, void *addr)
{
- /* TODO */
+ struct exynos_drm_gem_obj *exynos_gem_obj = dma_buf->priv;
+ struct exynos_drm_gem_buf *buf = exynos_gem_obj->buffer;
+
+ kunmap(buf->pages[page_num]);
}
static int exynos_gem_dmabuf_mmap(struct dma_buf *dma_buf, struct
vm_area_struct *vma)
--
1.7.0.4
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