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

[ Upstream commit 8b786ed8fb089e347af21d13ba5677325fcd4cd8 ]

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: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Stable-dep-of: c7d0b2db5bc5 ("bus: mhi: ep: Do not allocate memory for MHI objects from DMA zone")
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Manivannan Sadhasivam 2023-11-27 15:35:50 +05:30 committed by Greg Kroah-Hartman
parent efdfa92a82
commit a77e5950f9
1 changed files with 9 additions and 0 deletions
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9
include/linux/mhi_ep.h
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@ -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;