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authorThomas Zimmermann <tzimmermann@suse.de>2020-09-25 13:55:59 +0200
committerThomas Zimmermann <tzimmermann@suse.de>2020-09-29 12:40:58 +0200
commit6619ccf1bb1d0ebb071f758111efa83918b216fc (patch)
tree783ed423d39f343b7468d7531acff99a3554f120 /drivers/gpu/drm/drm_prime.c
parent01fd30da0474d5528d96a154cb50ce3b0352fd19 (diff)
dma-buf: Use struct dma_buf_map in dma_buf_vmap() interfaces
This patch updates dma_buf_vmap() and dma-buf's vmap callback to use struct dma_buf_map. The interfaces used to return a buffer address. This address now gets stored in an instance of the structure that is given as an additional argument. The functions return an errno code on errors. Users of the functions are updated accordingly. This is only an interface change. It is currently expected that dma-buf memory can be accessed with system memory load/store operations. v3: * update fastrpc driver (kernel test robot) v2: * always clear map parameter in dma_buf_vmap() (Daniel) * include dma-buf-heaps and i915 selftests (kernel test robot) Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de> Acked-by: Sumit Semwal <sumit.semwal@linaro.org> Acked-by: Christian König <christian.koenig@amd.com> Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch> Acked-by: Tomasz Figa <tfiga@chromium.org> Acked-by: Sam Ravnborg <sam@ravnborg.org> Link: https://patchwork.freedesktop.org/patch/msgid/20200925115601.23955-3-tzimmermann@suse.de
Diffstat (limited to 'drivers/gpu/drm/drm_prime.c')
-rw-r--r--drivers/gpu/drm/drm_prime.c9
1 files changed, 6 insertions, 3 deletions
diff --git a/drivers/gpu/drm/drm_prime.c b/drivers/gpu/drm/drm_prime.c
index 194784a5b344..2d75e58d21fe 100644
--- a/drivers/gpu/drm/drm_prime.c
+++ b/drivers/gpu/drm/drm_prime.c
@@ -662,22 +662,25 @@ EXPORT_SYMBOL(drm_gem_unmap_dma_buf);
/**
* drm_gem_dmabuf_vmap - dma_buf vmap implementation for GEM
* @dma_buf: buffer to be mapped
+ * @map: the virtual address of the buffer
*
* Sets up a kernel virtual mapping. This can be used as the &dma_buf_ops.vmap
* callback. Calls into &drm_gem_object_funcs.vmap for device specific handling.
*
* Returns the kernel virtual address or NULL on failure.
*/
-void *drm_gem_dmabuf_vmap(struct dma_buf *dma_buf)
+int drm_gem_dmabuf_vmap(struct dma_buf *dma_buf, struct dma_buf_map *map)
{
struct drm_gem_object *obj = dma_buf->priv;
void *vaddr;
vaddr = drm_gem_vmap(obj);
if (IS_ERR(vaddr))
- vaddr = NULL;
+ return PTR_ERR(vaddr);
- return vaddr;
+ dma_buf_map_set_vaddr(map, vaddr);
+
+ return 0;
}
EXPORT_SYMBOL(drm_gem_dmabuf_vmap);