Lines Matching full:metadata

158   **Optional: per descriptor metadata**
160   DMAengine provides two ways for metadata support.
164     The metadata buffer is allocated/provided by the client driver and it is
174     The metadata buffer is allocated/managed by the DMA driver. The client
176     the metadata and can directly update or read it.
178     Because the DMA driver manages the memory area containing the metadata,
182     metadata must not be accessed after issue_pending.
183     In other words: if the aim is to read back metadata after the transfer is
208          construct the metadata in the client's buffer
219       4. when the transfer is completed, the metadata should be available in the
228          engine's metadata area
229       3. update the metadata at the pointer
231          amount of data the client has placed into the metadata buffer
239          the pointer to the engine's metadata area
240       4. read out the metadata from the pointer
244      When DESC_METADATA_ENGINE mode is used the metadata area for the descriptor