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