rpmsg_internal.h

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/*
 * SPDX-License-Identifier: BSD-3-Clause
 *
 * $FreeBSD$
 */
 
#ifndef _RPMSG_INTERNAL_H_
#define _RPMSG_INTERNAL_H_
 
#include <stdint.h>
#include <openamp/rpmsg.h>
 
#if defined __cplusplus
extern "C" {
#endif
 
#ifdef RPMSG_DEBUG
#include <metal/log.h>
 
#define RPMSG_ASSERT(_exp, _msg) do { \
                if (!(_exp)) { \
                        metal_log(METAL_LOG_EMERGENCY, \
                                  "FATAL: %s - "_msg, __func__); \
                        metal_assert(_exp); \
                } \
        } while (0)
#else
#define RPMSG_ASSERT(_exp, _msg) metal_assert(_exp)
#endif
 
/* Mask to get the rpmsg buffer held counter from rpmsg_hdr reserved field */
#define RPMSG_BUF_HELD_SHIFT 16
#define RPMSG_BUF_HELD_MASK  (0xFFFFU << RPMSG_BUF_HELD_SHIFT)
 
#define RPMSG_LOCATE_HDR(p) \
        ((struct rpmsg_hdr *)((unsigned char *)(p) - sizeof(struct rpmsg_hdr)))
#define RPMSG_LOCATE_DATA(p) ((unsigned char *)(p) + sizeof(struct rpmsg_hdr))

enum rpmsg_ns_flags {
        RPMSG_NS_CREATE = 0,
        RPMSG_NS_DESTROY = 1,
};

METAL_PACKED_BEGIN
struct rpmsg_hdr {
        uint32_t src;

        uint32_t dst;

        uint32_t reserved;

        uint16_t len;

        uint16_t flags;
} METAL_PACKED_END;

METAL_PACKED_BEGIN
struct rpmsg_ns_msg {
        char name[RPMSG_NAME_SIZE];

        uint32_t addr;

        uint32_t flags;
} METAL_PACKED_END;
 
int rpmsg_send_ns_message(struct rpmsg_endpoint *ept, unsigned long flags);
 
struct rpmsg_endpoint *rpmsg_get_endpoint(struct rpmsg_device *rvdev,
                                          const char *name, uint32_t addr,
                                          uint32_t dest_addr);
void rpmsg_register_endpoint(struct rpmsg_device *rdev,
                             struct rpmsg_endpoint *ept,
                             const char *name,
                             uint32_t src, uint32_t dest,
                             rpmsg_ept_cb cb,
                             rpmsg_ns_unbind_cb ns_unbind_cb, void *priv);
 
static inline struct rpmsg_endpoint *
rpmsg_get_ept_from_addr(struct rpmsg_device *rdev, uint32_t addr)
{
        return rpmsg_get_endpoint(rdev, NULL, addr, RPMSG_ADDR_ANY);
}

void rpmsg_ept_incref(struct rpmsg_endpoint *ept);

void rpmsg_ept_decref(struct rpmsg_endpoint *ept);
 
#if defined __cplusplus
}
#endif
 
#endif /* _RPMSG_INTERNAL_H_ */