120 lines
3.0 KiB
C
120 lines
3.0 KiB
C
#ifndef RPMSG_RETARGET_H
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#define RPMSG_RETARGET_H
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#include <metal/mutex.h>
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#include <openamp/open_amp.h>
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#include <stdint.h>
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#if defined __cplusplus
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extern "C" {
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#endif
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/* File Operations System call definitions */
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#define OPEN_SYSCALL_ID 0x1UL
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#define CLOSE_SYSCALL_ID 0x2UL
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#define WRITE_SYSCALL_ID 0x3UL
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#define READ_SYSCALL_ID 0x4UL
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#define ACK_STATUS_ID 0x5UL
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#define TERM_SYSCALL_ID 0x6UL
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#define DEFAULT_PROXY_ENDPOINT 0xFFUL
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struct rpmsg_rpc_data;
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typedef int (*rpmsg_rpc_poll)(void *arg);
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typedef void (*rpmsg_rpc_shutdown_cb)(struct rpmsg_rpc_data *rpc);
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struct rpmsg_rpc_syscall_header {
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int32_t int_field1;
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int32_t int_field2;
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uint32_t data_len;
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};
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struct rpmsg_rpc_syscall {
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uint32_t id;
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struct rpmsg_rpc_syscall_header args;
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};
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struct rpmsg_rpc_data {
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struct rpmsg_endpoint ept;
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int ept_destroyed;
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atomic_int nacked;
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void *respbuf;
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size_t respbuf_len;
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rpmsg_rpc_poll poll;
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void *poll_arg;
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rpmsg_rpc_shutdown_cb shutdown_cb;
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metal_mutex_t lock;
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struct metal_spinlock buflock;
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};
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/**
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* rpmsg_rpc_init - initialize RPMsg remote procedure call
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*
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* This function is to intialize the remote procedure call
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* global data. RPMsg RPC will send request to remote and
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* wait for callback.
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*
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* @rpc: pointer to the global remote procedure call data
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* @rdev: pointer to the rpmsg device
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* @ept_name: name of the endpoint used by RPC
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* @ept_addr: address of the endpoint used by RPC
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* @ept_raddr: remote address of the endpoint used by RPC
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* @poll_arg: pointer to poll function argument
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* @poll: poll function
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* @shutdown_cb: shutdown callback function
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*
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* return 0 for success, and negative value for failure.
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*/
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int rpmsg_rpc_init(struct rpmsg_rpc_data *rpc,
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struct rpmsg_device *rdev,
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const char *ept_name, uint32_t ept_addr,
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uint32_t ept_raddr,
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void *poll_arg, rpmsg_rpc_poll poll,
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rpmsg_rpc_shutdown_cb shutdown_cb);
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/**
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* rpmsg_rpc_release - release RPMsg remote procedure call
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*
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* This function is to release remoteproc procedure call
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* global data.
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*
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* @rpc: pointer to the globacl remote procedure call
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*/
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void rpmsg_rpc_release(struct rpmsg_rpc_data *rpc);
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/**
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* rpmsg_rpc_send - Request RPMsg RPC call
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*
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* This function sends RPC request it will return with the length
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* of data and the response buffer.
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*
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* @rpc: pointer to remoteproc procedure call data struct
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* @req: pointer to request buffer
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* @len: length of the request data
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* @resp: pointer to where store the response buffer
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* @resp_len: length of the response buffer
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*
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* return length of the received response, negative value for failure.
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*/
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int rpmsg_rpc_send(struct rpmsg_rpc_data *rpc,
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void *req, size_t len,
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void *resp, size_t resp_len);
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/**
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* rpmsg_set_default_rpc - set default RPMsg RPC data
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*
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* The default RPC data is used to redirect standard C file operations
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* to RPMsg channels.
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*
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* @rpc: pointer to remoteproc procedure call data struct
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*/
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void rpmsg_set_default_rpc(struct rpmsg_rpc_data *rpc);
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#if defined __cplusplus
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}
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#endif
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#endif /* RPMSG_RETARGET_H */
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