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authorSumit Semwal <sumit.semwal@linaro.org>2015-01-23 10:23:43 +0300
committerSumit Semwal <sumit.semwal@linaro.org>2015-04-21 12:17:16 +0300
commitd8fbe341beb617ebb22b98fb893e4aa32ae2d864 (patch)
tree2e19c951d2b6ffef2319d87ec8a6c39e4e1ab8ee /include/linux/dma-buf.h
parent646da63172f660ba84f195c1165360a9b73583ee (diff)
downloadlinux-d8fbe341beb617ebb22b98fb893e4aa32ae2d864.tar.xz
dma-buf: cleanup dma_buf_export() to make it easily extensible
At present, dma_buf_export() takes a series of parameters, which makes it difficult to add any new parameters for exporters, if required. Make it simpler by moving all these parameters into a struct, and pass the struct * as parameter to dma_buf_export(). While at it, unite dma_buf_export_named() with dma_buf_export(), and change all callers accordingly. Reviewed-by: Maarten Lankhorst <maarten.lankhorst@canonical.com> Reviewed-by: Daniel Thompson <daniel.thompson@linaro.org> Acked-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com> Acked-by: Dave Airlie <airlied@redhat.com> Signed-off-by: Sumit Semwal <sumit.semwal@linaro.org>
Diffstat (limited to 'include/linux/dma-buf.h')
-rw-r--r--include/linux/dma-buf.h34
1 files changed, 28 insertions, 6 deletions
diff --git a/include/linux/dma-buf.h b/include/linux/dma-buf.h
index 694e1fe1c4b4..2f0b431b73e0 100644
--- a/include/linux/dma-buf.h
+++ b/include/linux/dma-buf.h
@@ -163,6 +163,33 @@ struct dma_buf_attachment {
};
/**
+ * struct dma_buf_export_info - holds information needed to export a dma_buf
+ * @exp_name: name of the exporting module - useful for debugging.
+ * @ops: Attach allocator-defined dma buf ops to the new buffer
+ * @size: Size of the buffer
+ * @flags: mode flags for the file
+ * @resv: reservation-object, NULL to allocate default one
+ * @priv: Attach private data of allocator to this buffer
+ *
+ * This structure holds the information required to export the buffer. Used
+ * with dma_buf_export() only.
+ */
+struct dma_buf_export_info {
+ const char *exp_name;
+ const struct dma_buf_ops *ops;
+ size_t size;
+ int flags;
+ struct reservation_object *resv;
+ void *priv;
+};
+
+/**
+ * helper macro for exporters; zeros and fills in most common values
+ */
+#define DEFINE_DMA_BUF_EXPORT_INFO(a) \
+ struct dma_buf_export_info a = { .exp_name = KBUILD_MODNAME }
+
+/**
* get_dma_buf - convenience wrapper for get_file.
* @dmabuf: [in] pointer to dma_buf
*
@@ -181,12 +208,7 @@ struct dma_buf_attachment *dma_buf_attach(struct dma_buf *dmabuf,
void dma_buf_detach(struct dma_buf *dmabuf,
struct dma_buf_attachment *dmabuf_attach);
-struct dma_buf *dma_buf_export_named(void *priv, const struct dma_buf_ops *ops,
- size_t size, int flags, const char *,
- struct reservation_object *);
-
-#define dma_buf_export(priv, ops, size, flags, resv) \
- dma_buf_export_named(priv, ops, size, flags, KBUILD_MODNAME, resv)
+struct dma_buf *dma_buf_export(const struct dma_buf_export_info *exp_info);
int dma_buf_fd(struct dma_buf *dmabuf, int flags);
struct dma_buf *dma_buf_get(int fd);