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/* Copyright (c) 2013, 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_std_types.h>
#include <odp_atomic.h>
#include <odp_buffer_pool.h>
#include <odp_buffer.h>
#include <odp_debug.h>
#include <odp_align.h>
/* TODO: move these to correct files */
typedef uint64_t odp_phys_addr_t;
#define ODP_BUFFER_MAX_INDEX (ODP_BUFFER_MAX_BUFFERS - 2)
#define ODP_BUFFER_INVALID_INDEX (ODP_BUFFER_MAX_BUFFERS - 1)
#define ODP_BUFS_PER_CHUNK 16
#define ODP_BUFS_PER_SCATTER 4
#define ODP_BUFFER_TYPE_CHUNK 0xffff
#define ODP_BUFFER_POOL_BITS 4
#define ODP_BUFFER_INDEX_BITS (32 - ODP_BUFFER_POOL_BITS)
#define ODP_BUFFER_MAX_POOLS (1 << ODP_BUFFER_POOL_BITS)
#define ODP_BUFFER_MAX_BUFFERS (1 << ODP_BUFFER_INDEX_BITS)
typedef union odp_buffer_bits_t {
uint32_t u32;
odp_buffer_t handle;
struct {
uint32_t pool:ODP_BUFFER_POOL_BITS;
uint32_t index:ODP_BUFFER_INDEX_BITS;
};
} odp_buffer_bits_t;
/* forward declaration */
struct odp_buffer_hdr_t;
/*
* Scatter/gather list of buffers
*/
typedef struct odp_buffer_scatter_t {
/* buffer pointers */
struct odp_buffer_hdr_t *buf[ODP_BUFS_PER_SCATTER];
int num_bufs; /* num buffers */
int pos; /* position on the list */
size_t total_len; /* Total length */
} odp_buffer_scatter_t;
/*
* Chunk of buffers (in single pool)
*/
typedef struct odp_buffer_chunk_t {
uint32_t num_bufs; /* num buffers */
uint32_t buf_index[ODP_BUFS_PER_CHUNK]; /* buffers */
} odp_buffer_chunk_t;
typedef struct odp_buffer_hdr_t {
struct odp_buffer_hdr_t *next; /* next buf in a list */
odp_buffer_bits_t handle; /* handle */
odp_phys_addr_t phys_addr; /* physical data start address */
void *addr; /* virtual data start address */
uint32_t index; /* buf index in the pool */
size_t size; /* max data size */
size_t cur_offset; /* current offset */
odp_atomic_int_t ref_count; /* reference count */
odp_buffer_scatter_t scatter; /* Scatter/gather list */
int type; /* type of next header */
odp_buffer_pool_t pool; /* buffer pool */
uint8_t payload[]; /* next header or data */
} odp_buffer_hdr_t;
ODP_ASSERT(sizeof(odp_buffer_hdr_t) == ODP_OFFSETOF(odp_buffer_hdr_t, payload),
ODP_BUFFER_HDR_T__SIZE_ERROR);
typedef struct odp_buffer_chunk_hdr_t {
odp_buffer_hdr_t buf_hdr;
odp_buffer_chunk_t chunk;
} odp_buffer_chunk_hdr_t;
odp_buffer_hdr_t *odp_buf_to_hdr(odp_buffer_t buf);
int odp_buffer_snprint(char *str, size_t n, odp_buffer_t buf);
#ifdef __cplusplus
}
#endif
#endif
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