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/*
* udebug - debug ring buffer library
*
* Copyright (C) 2023 Felix Fietkau <nbd@nbd.name>
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#ifndef __UDEBUG_PROTO_H
#define __UDEBUG_PROTO_H
#include "udebug.h"
struct udebug_hdr {
uint32_t ring_size;
uint32_t data_size;
uint32_t format;
uint32_t sub_format;
uintptr_t flags[8 / sizeof(uintptr_t)];
uintptr_t notify;
uint32_t head_hi;
uint32_t head;
uint32_t data_head;
uint32_t data_used;
};
enum udebug_client_msg_type {
CL_MSG_RING_ADD,
CL_MSG_RING_REMOVE,
CL_MSG_RING_NOTIFY,
CL_MSG_GET_HANDLE,
CL_MSG_RING_GET,
CL_MSG_ERROR,
};
struct udebug_client_msg {
uint8_t type;
uint8_t _pad[3];
uint32_t id;
union {
struct {
uint32_t ring_size, data_size;
};
uint32_t notify_mask;
};
} __attribute__((packed, aligned(4)));
static inline struct udebug_ptr *
udebug_ring_ptr(struct udebug_hdr *hdr, uint32_t idx)
{
struct udebug_ptr *ring = (struct udebug_ptr *)&hdr[1];
return &ring[idx & (hdr->ring_size - 1)];
}
static inline void *udebug_buf_ptr(struct udebug_buf *buf, uint32_t ofs)
{
return buf->data + (ofs & (buf->data_size - 1));
}
#endif
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