Commit 8b786ed8 authored by Manivannan Sadhasivam's avatar Manivannan Sadhasivam
Browse files

bus: mhi: ep: Introduce async read/write callbacks 



These callbacks can be implemented by the controller drivers to perform
async read/write operation that increases the throughput.

For aiding the async operation, a completion callback is also introduced.

Signed-off-by: default avatarManivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
parent 92710524

include/linux/mhi_ep.h

+9 −0
Original line number Diff line number Diff line
@@ -54,11 +54,16 @@ struct mhi_ep_db_info { 
 * @dev_addr: Address of the buffer in endpoint

 * @host_addr: Address of the bufffer in host

 * @size: Size of the buffer

 * @cb: Callback to be executed by controller drivers after transfer completion (async)

 * @cb_buf: Opaque buffer to be passed to the callback

 */

struct mhi_ep_buf_info {

	void *dev_addr;

	u64 host_addr;

	size_t size;



	void (*cb)(struct mhi_ep_buf_info *buf_info);

	void *cb_buf;

};



/**
@@ -96,6 +101,8 @@ struct mhi_ep_buf_info { 
 * @unmap_free: CB function to unmap and free the allocated memory in endpoint for storing host context

 * @read_sync: CB function for reading from host memory synchronously

 * @write_sync: CB function for writing to host memory synchronously

 * @read_async: CB function for reading from host memory asynchronously

 * @write_async: CB function for writing to host memory asynchronously

 * @mhi_state: MHI Endpoint state

 * @max_chan: Maximum channels supported by the endpoint controller

 * @mru: MRU (Maximum Receive Unit) value of the endpoint controller
@@ -151,6 +158,8 @@ struct mhi_ep_cntrl { 
			   void __iomem *virt, size_t size);

	int (*read_sync)(struct mhi_ep_cntrl *mhi_cntrl, struct mhi_ep_buf_info *buf_info);

	int (*write_sync)(struct mhi_ep_cntrl *mhi_cntrl, struct mhi_ep_buf_info *buf_info);

	int (*read_async)(struct mhi_ep_cntrl *mhi_cntrl, struct mhi_ep_buf_info *buf_info);

	int (*write_async)(struct mhi_ep_cntrl *mhi_cntrl, struct mhi_ep_buf_info *buf_info);



	enum mhi_state mhi_state;