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/*
* Copyright (c) 2008 Carsten Schlote <c.schlote@konzeptpark.de>
* See file CREDITS for list of people who contributed to this project.
*
* This file is part of U-Boot V2.
*
* U-Boot V2 is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* U-Boot V2 is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with U-Boot V2. If not, see <http://www.gnu.org/licenses/>.
*/
/** @file
* Definitions for network buffer management
*/
#ifndef _MCFV4E_NBUF_H_
#define _MCFV4E_NBUF_H_
/*
* Include the Queue structure definitions
*/
#include "queue.h"
/*
* Number of network buffers to use
*/
#define NBUF_MAX 30
/*
* Size of each buffer in bytes
*/
#ifndef NBUF_SZ
#define NBUF_SZ 1520
#endif
/*
* Defines to identify all the buffer queues
* - FREE must always be defined as 0
*/
#define NBUF_FREE 0 /* available buffers */
#define NBUF_TX_RING 1 /* buffers in the Tx BD ring */
#define NBUF_RX_RING 2 /* buffers in the Rx BD ring */
#define NBUF_SCRATCH 3 /* misc */
#define NBUF_MAXQ 4 /* total number of queueus */
/*
* Buffer Descriptor Format
*
* Fields:
* next Pointer to next node in the queue
* data Pointer to the data buffer
* offset Index into buffer
* length Remaining bytes in buffer from (data + offset)
*/
typedef struct
{
QNODE node;
uint8_t *data;
uint16_t offset;
uint16_t length;
} NBUF;
/*
* Functions to manipulate the network buffers.
*/
int nbuf_init(void);
void nbuf_flush(void);
NBUF * nbuf_alloc (void);
void nbuf_free(NBUF *);
NBUF *nbuf_remove(int);
void nbuf_add(int, NBUF *);
void nbuf_reset(void);
void nbuf_debug_dump(void);
#endif /* _MCFV4E_NBUF_H_ */
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