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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 */ |