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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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