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/* $OpenBSD: stp2002var.h,v 1.1 1998/07/17 21:33:11 jason Exp $ */
/*
* Copyright (c) 1998 Jason L. Wright (jason@thought.net)
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Jason L. Wright
* 4. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY 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) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
struct stp_rxd {
volatile u_int32_t rx_flags;
volatile u_int32_t rx_addr;
};
#define STP_RXFLAG_OWN 0x80000000 /* desc owner: 1=hw,0=sw */
#define STP_RXFLAG_OVERFLOW 0x40000000 /* 1 = buffer over flow */
#define STP_RXFLAG_SIZE 0x3fff0000 /* desciptor size */
#define STP_RXFLAG_CSUM 0x0000ffff /* checksum mask */
struct stp_txd {
volatile u_int32_t tx_flags;
volatile u_int32_t tx_addr;
};
#define STP_TXFLAG_OWN 0x80000000 /* desc owner: 1=hw,0=sw */
#define STP_TXFLAG_SOP 0x40000000 /* 1 = start of pkt */
#define STP_TXFLAG_EOP 0x20000000 /* 1 = end of pkt */
#define STP_TXFLAG_CSENABLE 0x10000000 /* 1 = use hw checksums */
#define STP_TXFLAG_CSLOCATION 0x0ff00000 /* checksum location mask */
#define STP_TXFLAG_CSBUFBEGIN 0x000fc000 /* checksum begin mask */
#define STP_TXFLAG_SIZE 0x00003fff /* pkt size mask */
#define STP_RX_RING_SIZE 32 /* Must be 32, 64, 128, or 256 */
#define STP_TX_RING_SIZE 32 /* 16<=x<=256 and divisible by 16 */
#define STP_RX_RING_MAX 256 /* maximum ring size: rx */
#define STP_TX_RING_MAX 256 /* maximum ring size: tx */
#define STP_RX_PKT_BUF_SZ 2048 /* size of a rx buffer */
#define STP_RX_OFFSET 2 /* packet offset */
#define STP_RX_CSUMLOC 0x00 /* checksum location */
#define STP_TX_PKT_BUF_SZ 1546 /* size of a tx buffer */
#define STP_RX_ALIGN_SIZE 64 /* rx buffers must align 64 XXX */
#define STP_RX_ALIGN_MASK (~(RX_ALIGN_SIZE - 1))
struct stp_desc {
struct stp_rxd stp_rxd[STP_RX_RING_MAX];
struct stp_txd stp_txd[STP_TX_RING_MAX];
};
struct stp_bufs {
char rx_buf[STP_RX_RING_SIZE][STP_RX_PKT_BUF_SZ];
char tx_buf[STP_TX_RING_SIZE][STP_TX_PKT_BUF_SZ];
};
struct stp_base {
/* public members */
struct arpcom stp_arpcom; /* ethernet common */
u_long stp_rx_dvma, stp_tx_dvma; /* ring dva pointers */
void (*stp_tx_dmawakeup) __P((void *)); /* func to start tx */
/* internal use */
struct stp_desc *stp_desc, *stp_desc_dva; /* ring descriptors */
struct stp_bufs *stp_bufs, *stp_bufs_dva; /* packet buffers */
int stp_first_td, stp_last_td, stp_no_td; /* tx counters */
int stp_last_rd; /* rx counters */
};
void stp2002_meminit __P((struct stp_base *));
int stp2002_rint __P((struct stp_base *));
int stp2002_tint __P((struct stp_base *));
void stp2002_start __P((struct stp_base *));
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