diff options
| author | Thomas Zimmermann <tzimmermann@suse.de> | 2020-09-25 13:55:59 +0200 |
|---|---|---|
| committer | Thomas Zimmermann <tzimmermann@suse.de> | 2020-09-29 12:40:58 +0200 |
| commit | 6619ccf1bb1d0ebb071f758111efa83918b216fc (patch) | |
| tree | 783ed423d39f343b7468d7531acff99a3554f120 /include | |
| parent | 01fd30da0474d5528d96a154cb50ce3b0352fd19 (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 'include')
| -rw-r--r-- | include/drm/drm_prime.h | 3 | ||||
| -rw-r--r-- | include/linux/dma-buf-map.h | 13 | ||||
| -rw-r--r-- | include/linux/dma-buf.h | 6 |
3 files changed, 18 insertions, 4 deletions
diff --git a/include/drm/drm_prime.h b/include/drm/drm_prime.h index bf141e74a1c2..3ee22639ff77 100644 --- a/include/drm/drm_prime.h +++ b/include/drm/drm_prime.h @@ -54,6 +54,7 @@ struct device; struct dma_buf_export_info; struct dma_buf; struct dma_buf_attachment; +struct dma_buf_map; enum dma_data_direction; @@ -82,7 +83,7 @@ struct sg_table *drm_gem_map_dma_buf(struct dma_buf_attachment *attach, void drm_gem_unmap_dma_buf(struct dma_buf_attachment *attach, struct sg_table *sgt, enum dma_data_direction dir); -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); void drm_gem_dmabuf_vunmap(struct dma_buf *dma_buf, void *vaddr); int drm_gem_prime_mmap(struct drm_gem_object *obj, struct vm_area_struct *vma); diff --git a/include/linux/dma-buf-map.h b/include/linux/dma-buf-map.h index 00143c88feb6..5ae732d373eb 100644 --- a/include/linux/dma-buf-map.h +++ b/include/linux/dma-buf-map.h @@ -23,6 +23,19 @@ struct dma_buf_map { bool is_iomem; }; +/** + * dma_buf_map_set_vaddr - Sets a dma-buf mapping structure to an address in system memory + * @map: The dma-buf mapping structure + * @vaddr: A system-memory address + * + * Sets the address and clears the I/O-memory flag. + */ +static inline void dma_buf_map_set_vaddr(struct dma_buf_map *map, void *vaddr) +{ + map->vaddr = vaddr; + map->is_iomem = false; +} + /* API transition helper */ static inline bool dma_buf_map_is_vaddr(const struct dma_buf_map *map, const void *vaddr) { diff --git a/include/linux/dma-buf.h b/include/linux/dma-buf.h index fcc2ddfb6d18..7237997cfa38 100644 --- a/include/linux/dma-buf.h +++ b/include/linux/dma-buf.h @@ -266,7 +266,7 @@ struct dma_buf_ops { */ int (*mmap)(struct dma_buf *, struct vm_area_struct *vma); - void *(*vmap)(struct dma_buf *); + int (*vmap)(struct dma_buf *dmabuf, struct dma_buf_map *map); void (*vunmap)(struct dma_buf *, void *vaddr); }; @@ -503,6 +503,6 @@ int dma_buf_end_cpu_access(struct dma_buf *dma_buf, int dma_buf_mmap(struct dma_buf *, struct vm_area_struct *, unsigned long); -void *dma_buf_vmap(struct dma_buf *); -void dma_buf_vunmap(struct dma_buf *, void *vaddr); +int dma_buf_vmap(struct dma_buf *dmabuf, struct dma_buf_map *map); +void dma_buf_vunmap(struct dma_buf *dmabuf, void *vaddr); #endif /* __DMA_BUF_H__ */ |