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/* Copyright (c) 2013-2018, Linaro Limited
* All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
/**
* @file
*
* ODP buffer descriptor - implementation internal
*/
#ifndef ODP_BUFFER_INTERNAL_H_
#define ODP_BUFFER_INTERNAL_H_
#ifdef __cplusplus
extern "C" {
#endif
#include <odp/api/std_types.h>
#include <odp/api/atomic.h>
#include <odp/api/pool.h>
#include <odp/api/buffer.h>
#include <odp/api/debug.h>
#include <odp/api/align.h>
#include <odp_align_internal.h>
#include <odp_config_internal.h>
#include <odp/api/byteorder.h>
#include <odp/api/thread.h>
#include <odp/api/event.h>
#include <odp_forward_typedefs_internal.h>
#include <odp_schedule_if.h>
#include <stddef.h>
typedef struct seg_entry_t {
void *hdr;
uint8_t *data;
uint32_t len;
} seg_entry_t;
typedef union buffer_index_t {
uint32_t u32;
struct {
uint32_t pool :8;
uint32_t buffer :24;
};
} buffer_index_t;
/* Check that pool index fit into bit field */
ODP_STATIC_ASSERT(ODP_CONFIG_POOLS <= (0xFF + 1), "TOO_MANY_POOLS");
/* Check that buffer index fit into bit field */
ODP_STATIC_ASSERT(CONFIG_POOL_MAX_NUM <= (0xFFFFFF + 1), "TOO_LARGE_POOL");
/* Common buffer header */
struct ODP_ALIGNED_CACHE odp_buffer_hdr_t {
/* Combined pool and buffer index */
buffer_index_t index;
/* Total segment count */
uint16_t segcount;
/* Pool type */
int8_t type;
/* Number of seg[] entries used */
uint8_t num_seg;
/* Next header which continues the segment list */
void *next_seg;
/* Last header of the segment list */
void *last_seg;
/* Initial buffer data pointer */
uint8_t *base_data;
/* Pool pointer */
void *pool_ptr;
/* --- 40 bytes --- */
/* Segments */
seg_entry_t seg[CONFIG_PACKET_SEGS_PER_HDR];
/* --- Mostly read only data --- */
const void *user_ptr;
/* Reference count */
odp_atomic_u32_t ref_cnt;
/* Event type. Maybe different than pool type (crypto compl event) */
int8_t event_type;
/* Initial buffer tail pointer */
uint8_t *buf_end;
/* User area pointer */
void *uarea_addr;
/* ipc mapped process can not walk over pointers,
* offset has to be used */
uint64_t ipc_data_offset;
/* Data or next header */
uint8_t data[0];
};
ODP_STATIC_ASSERT(CONFIG_PACKET_SEGS_PER_HDR < 256,
"CONFIG_PACKET_SEGS_PER_HDR_TOO_LARGE");
odp_event_type_t _odp_buffer_event_type(odp_buffer_t buf);
void _odp_buffer_event_type_set(odp_buffer_t buf, int ev);
int odp_buffer_snprint(char *str, uint32_t n, odp_buffer_t buf);
static inline odp_buffer_t buf_from_buf_hdr(odp_buffer_hdr_t *hdr)
{
return (odp_buffer_t)hdr;
}
static inline odp_event_t event_from_buf_hdr(odp_buffer_hdr_t *hdr)
{
return (odp_event_t)hdr;
}
#ifdef __cplusplus
}
#endif
#endif
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