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authorThomas Zimmermann <tzimmermann@suse.de>2020-09-25 14:55:59 +0300
committerThomas Zimmermann <tzimmermann@suse.de>2020-09-29 13:40:58 +0300
commit6619ccf1bb1d0ebb071f758111efa83918b216fc (patch)
tree783ed423d39f343b7468d7531acff99a3554f120 /include/linux/dma-buf-map.h
parent01fd30da0474d5528d96a154cb50ce3b0352fd19 (diff)
downloadlinux-6619ccf1bb1d0ebb071f758111efa83918b216fc.tar.xz
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/linux/dma-buf-map.h')
-rw-r--r--include/linux/dma-buf-map.h13
1 files changed, 13 insertions, 0 deletions
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)
{