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/* *********************************************************************
* Broadcom Common Firmware Environment (CFE)
*
* Network EBUF macros File: net_ebuf.h
*
* This file contains macros and function prototypes for
* messing with "ebuf" buffers. ebufs describe network
* packets. They're sort of like poor-man's mbufs :-)
*
* Author: Mitch Lichtenberg (mpl@broadcom.com)
*
*********************************************************************
*
* Copyright 2000,2001,2002,2003
* Broadcom Corporation. All rights reserved.
*
* This software is furnished under license and may be used and
* copied only in accordance with the following terms and
* conditions. Subject to these conditions, you may download,
* copy, install, use, modify and distribute modified or unmodified
* copies of this software in source and/or binary form. No title
* or ownership is transferred hereby.
*
* 1) Any source code used, modified or distributed must reproduce
* and retain this copyright notice and list of conditions
* as they appear in the source file.
*
* 2) No right is granted to use any trade name, trademark, or
* logo of Broadcom Corporation. The "Broadcom Corporation"
* name may not be used to endorse or promote products derived
* from this software without the prior written permission of
* Broadcom Corporation.
*
* 3) THIS SOFTWARE IS PROVIDED "AS-IS" AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING BUT NOT LIMITED TO, ANY IMPLIED
* WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
* PURPOSE, OR NON-INFRINGEMENT ARE DISCLAIMED. IN NO EVENT
* SHALL BROADCOM BE LIABLE FOR ANY DAMAGES WHATSOEVER, AND IN
* PARTICULAR, BROADCOM SHALL NOT BE LIABLE FOR DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
* GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
* TORT (INCLUDING NEGLIGENCE OR OTHERWISE), EVEN IF ADVISED OF
* THE POSSIBILITY OF SUCH DAMAGE.
********************************************************************* */
/* *********************************************************************
* Constants
********************************************************************* */
#define ENET_MAX_PKT 1514
#define ENET_CRC_SIZE 4
#define ENET_ADDR_LEN 6
#define ENET_DIX_HEADER 14
/* *********************************************************************
* Structures
********************************************************************* */
typedef struct ebuf_s {
queue_t eb_qblock; /* linkage */
unsigned int eb_length; /* length of area at eb_ptr */
unsigned int eb_status; /* rx/tx status */
int eb_port; /* eth port that owns buffer */
void *eb_device; /* underlying net device */
int eb_usrdata; /* user-defined stuff */
uint8_t *eb_usrptr; /* user-defined stuff */
uint8_t *eb_ptr; /* current ptr within pkt */
uint8_t eb_data[0x5F0]; /* data, must be > ENET_MAX_PKT */
/* and divisible by sizeof(uint) */
} ebuf_t;
/*
* Macros to initialize ebufs
*/
#define ebuf_init_rx(eb) (eb)->eb_ptr = (eb)->eb_data; \
(eb)->eb_length = 0; \
(eb)->eb_status = 0
#define ebuf_init_tx(eb) (eb)->eb_ptr = (eb)->eb_data; \
(eb)->eb_length = 0; \
(eb)->eb_status = 0
/*
* Macros to move the currens position within an ebuf
*/
#define ebuf_prepend(eb,amt) (eb)->eb_ptr -= amt; (eb)->eb_length += (amt)
#define ebuf_adjust(eb,amt) (eb)->eb_ptr += (amt); (eb)->eb_length += (amt)
#define ebuf_seek(eb,amt) (eb)->eb_ptr += (amt)
#define ebuf_remlen(eb) ((eb)->eb_length)
#define ebuf_length(eb) ((eb)->eb_length)
#define ebuf_ptr(eb) ((eb)->eb_ptr)
#define ebuf_setlength(eb,amt) (eb)->eb_length = (amt)
/*
* ebuf_append_xxx macros - these macros add data to the
* end of a packet, adjusting the length
*/
#define ebuf_append_u8(eb,b) ((eb)->eb_ptr[(eb)->eb_length++]) = (b) ;
#define ebuf_append_u16_be(eb,w) ebuf_append_u8(eb,((w) >> 8) & 0xFF) ; \
ebuf_append_u8(eb,((w) & 0xFF))
#define ebuf_append_u32_be(eb,w) ebuf_append_u8(eb,((w) >> 24) & 0xFF) ; \
ebuf_append_u8(eb,((w) >> 16) & 0xFF) ; \
ebuf_append_u8(eb,((w) >> 8) & 0xFF) ; \
ebuf_append_u8(eb,((w) & 0xFF))
#define ebuf_append_bytes(eb,b,l) memcpy(&((eb)->eb_ptr[(eb)->eb_length]),(b),(l)); \
(eb)->eb_length += (l)
/*
* ebuf_put_xxx macros - these macros modify data in the middle
* of a packet, typically in an area already allocated with
* ebuf_adjust. The length is not updated, but the pointer is.
*/
#define ebuf_put_u8(eb,b) *((eb)->eb_ptr++) = (b)
#define ebuf_put_u16_be(eb,w) ebuf_put_u8(eb,((w) >> 8) & 0xFF) ; \
ebuf_put_u8(eb,((w) & 0xFF))
#define ebuf_put_u32_be(eb,w) ebuf_put_u8(eb,((w) >> 24) & 0xFF) ; \
ebuf_put_u8(eb,((w) >> 16) & 0xFF) ; \
ebuf_put_u8(eb,((w) >> 8) & 0xFF) ; \
ebuf_put_u8(eb,((w) & 0xFF))
#define ebuf_put_bytes(eb,b,l) memcpy((buf)->eb_ptr,(b),(l)) ; (buf)->eb_ptr += (l)
#define ebuf_srcaddr(eb) &((eb)->eb_data[6])
#define ebuf_destaddr(eb) &((eb)->eb_data[0])
/* return next byte from the ebuf, and advance pointer */
#define ebuf_skip(eb,amt) (eb)->eb_length -= (amt); (eb)->eb_ptr += (amt)
#define ebuf_get_u8(eb,v) (eb)->eb_length--; \
v = (*((eb)->eb_ptr++))
/* return next u16 from the ebuf, big-endian */
#define ebuf_get_u16_be(eb,v) (eb)->eb_ptr+=2; \
(eb)->eb_length-=2; \
v = ( ((uint16_t)*((eb)->eb_ptr-1)) | \
(((uint16_t)*((eb)->eb_ptr-2)) << 8) )
/* return next u32 from the ebuf, big-endian */
#define ebuf_get_u32_be(eb,v) (eb)->eb_ptr+=4; \
(eb)->eb_length-=4; \
v = ( ((uint32_t)*((eb)->eb_ptr-1)) | \
(((uint32_t)*((eb)->eb_ptr-2)) << 8) | \
(((uint32_t)*((eb)->eb_ptr-3)) << 16) | \
(((uint32_t)*((eb)->eb_ptr-4)) << 24) )
#define ebuf_get_bytes(eb,b,l) memcpy((b),(buf)->eb_ptr,(l)) ; (eb)->eb_ptr += (l) ; (eb)->eb_length -= (l)
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