cregit-Linux how code gets into the kernel

Release 4.11 drivers/media/platform/sti/delta/delta-ipc.h

/*
 * Copyright (C) STMicroelectronics SA 2015
 * Author: Hugues Fruchet <hugues.fruchet@st.com> for STMicroelectronics.
 * License terms:  GNU General Public License (GPL), version 2
 */

#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 */

Overall Contributors

PersonTokensPropCommitsCommitProp
Hugues Fruchet104100.00%1100.00%
Total104100.00%1100.00%
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