[PATCH 3/3] drm/exynos: implement kmap/kunmap/kmap_atomic/kunmap_atomic functions of dma_buf_ops

[Cooper Yuan <cooperyuan@xxxxxxxxx>]

Implement kmap/kmap_atomic, kunmap/kunmap_atomic functions of dma_buf_ops.

Signed-off-by: Cooper Yuan <cooperyuan@xxxxxxxxx>
---
 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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