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/* SPDX-License-Identifier: GPL-2.0 */
/*
* Copyright (C) STMicroelectronics SA 2015
* Author: Hugues Fruchet <hugues.fruchet@st.com> for STMicroelectronics.
*/
#ifndef DELTA_IPC_H
#define DELTA_IPC_H
int delta_ipc_init(struct delta_dev *delta);
void delta_ipc_exit(struct delta_dev *delta);
/*
* delta_ipc_open - open a decoding instance on firmware side
* @ctx: (in) delta context
* @name: (in) name of decoder to be used
* @param: (in) open command parameters specific to decoder
* @param.size: (in) size of parameter
* @param.data: (in) virtual address of parameter
* @ipc_buf_size: (in) size of IPC shared buffer between host
* and copro used to share command data.
* Client have to set here the size of the biggest
* command parameters (+ status if any).
* Allocation will be done in this function which
* will give back to client in @ipc_buf the virtual
* & physical addresses & size of shared IPC buffer.
* All the further command data (parameters + status)
* have to be written in this shared IPC buffer
* virtual memory. This is done to avoid
* unnecessary copies of command data.
* @ipc_buf: (out) allocated IPC shared buffer
* @ipc_buf.size: (out) allocated size
* @ipc_buf.vaddr: (out) virtual address where to copy
* further command data
* @hdl: (out) handle of decoding instance.
*/
int delta_ipc_open(struct delta_ctx *ctx, const char *name,
struct delta_ipc_param *param, u32 ipc_buf_size,
struct delta_buf **ipc_buf, void **hdl);
/*
* delta_ipc_set_stream - set information about stream to decoder
* @hdl: (in) handle of decoding instance.
* @param: (in) set stream command parameters specific to decoder
* @param.size: (in) size of parameter
* @param.data: (in) virtual address of parameter. Must be
* within IPC shared buffer range
*/
int delta_ipc_set_stream(void *hdl, struct delta_ipc_param *param);
/*
* delta_ipc_decode - frame decoding synchronous request, returns only
* after decoding completion on firmware side.
* @hdl: (in) handle of decoding instance.
* @param: (in) decode command parameters specific to decoder
* @param.size: (in) size of parameter
* @param.data: (in) virtual address of parameter. Must be
* within IPC shared buffer range
* @status: (in/out) decode command status specific to decoder
* @status.size: (in) size of status
* @status.data: (in/out) virtual address of status. Must be
* within IPC shared buffer range.
* Status is filled by decoding instance
* after decoding completion.
*/
int delta_ipc_decode(void *hdl, struct delta_ipc_param *param,
struct delta_ipc_param *status);
/*
* delta_ipc_close - close decoding instance
* @hdl: (in) handle of decoding instance to close.
*/
void delta_ipc_close(void *hdl);
#endif /* DELTA_IPC_H */
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