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/* $OpenBSD: if_gxvar.h,v 1.1 2002/04/02 13:03:31 nate Exp $ */
/*-
* Copyright (c) 1999,2000,2001 Jonathan Lemon
* 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. Neither the name of the author nor the names of any co-contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``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 OR CONTRIBUTORS 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.
*
* $FreeBSD$
*/
#define GX_LOCK(gx)
#define GX_UNLOCK(gx)
#define mtx_init(a, b, c)
#define mtx_destroy(a)
struct mtx { int filler; };
#ifndef PCIM_CMD_MWIEN
#define PCIM_CMD_MWIEN 0x0010
#endif
#define ETHER_ALIGN 2
/* CSR_WRITE_8 assumes the register is in low/high order */
#define CSR_WRITE_8(gx, reg, val) do { \
bus_space_write_4(gx->gx_btag, gx->gx_bhandle, reg, val & 0xffffffff); \
bus_space_write_4(gx->gx_btag, gx->gx_bhandle, reg + 4, val >> 32); \
} while (0)
#define CSR_WRITE_4(gx, reg, val) \
bus_space_write_4(gx->gx_btag, gx->gx_bhandle, reg, val)
#define CSR_WRITE_2(gx, reg, val) \
bus_space_write_2(gx->gx_btag, gx->gx_bhandle, reg, val)
#define CSR_WRITE_1(gx, reg, val) \
bus_space_write_1(gx->gx_btag, gx->gx_bhandle, reg, val)
#define CSR_READ_4(gx, reg) \
bus_space_read_4(gx->gx_btag, gx->gx_bhandle, reg)
#define CSR_READ_2(gx, reg) \
bus_space_read_2(gx->gx_btag, gx->gx_bhandle, reg)
#define CSR_READ_1(gx, reg) \
bus_space_read_1(gx->gx_btag, gx->gx_bhandle, reg)
#define GX_SETBIT(gx, reg, x) \
CSR_WRITE_4(gx, reg, (CSR_READ_4(gx, reg) | (x)))
#define GX_CLRBIT(gx, reg, x) \
CSR_WRITE_4(gx, reg, (CSR_READ_4(gx, reg) & ~(x)))
/*
* In theory, these can go up to 64K each, but due to chip bugs,
* they are limited to 256 max. Descriptor counts should be a
* multiple of 8.
*/
#define GX_TX_RING_CNT 256
#define GX_RX_RING_CNT 256
#define GX_INC(x, y) (x) = (x + 1) % y
#define GX_PREV(x, y) (x == 0 ? y - 1 : x - 1)
#define GX_MAX_MTU (16 * 1024)
struct gx_ring_data {
struct gx_rx_desc gx_rx_ring[GX_RX_RING_CNT];
struct gx_tx_desc gx_tx_ring[GX_TX_RING_CNT];
};
/*
* Number of DMA segments in a TxCB. Note that this is carefully
* chosen to make the total struct size an even power of two. It's
* critical that no TxCB be split across a page boundry since
* no attempt is made to allocate physically contiguous memory.
*
*/
#ifdef __alpha__ /* XXX - should be conditional on pointer size */
#define GX_NTXSEG 30
#else
#define GX_NTXSEG 31
#endif
#define GX_NRXSEG GX_NTXSEG
struct gx_chain_data {
struct mbuf *gx_rx_chain[GX_RX_RING_CNT];
struct mbuf *gx_tx_chain[GX_TX_RING_CNT];
bus_dmamap_t gx_rx_map[GX_RX_RING_CNT];
bus_dmamap_t gx_tx_map[GX_TX_RING_CNT];
};
struct gx_regs {
int r_rx_base;
int r_rx_length;
int r_rx_head;
int r_rx_tail;
int r_rx_delay;
int r_rx_dma_ctrl;
int r_tx_base;
int r_tx_length;
int r_tx_head;
int r_tx_tail;
int r_tx_delay;
int r_tx_dma_ctrl;
};
struct gx_softc {
struct device gx_dev;
struct arpcom arpcom; /* interface info */
struct ifmedia gx_media; /* media info */
bus_space_handle_t gx_bhandle; /* bus space handle */
bus_space_tag_t gx_btag; /* bus space tag */
void *gx_intrhand;
struct mii_data gx_mii;
u_int8_t gx_tbimode; /* transceiver flag */
int gx_vflags; /* version-specific flags */
u_int32_t gx_ipg; /* version-specific IPG */
bus_dma_tag_t gx_dmatag;
struct gx_ring_data *gx_rdata;
struct gx_chain_data gx_cdata;
bus_dmamap_t gx_ring_map;
int gx_if_flags;
struct mbuf *gx_pkthdr;
struct mbuf **gx_pktnextp;
int gx_rx_tail_idx; /* receive ring tail index */
int gx_tx_tail_idx; /* transmit ring tail index */
int gx_tx_head_idx; /* transmit ring tail index */
int gx_txcnt;
int gx_txcontext; /* current TX context */
struct gx_regs gx_reg;
struct mtx gx_mtx;
/* tunables */
int gx_tx_intr_delay;
int gx_rx_intr_delay;
/* statistics */
int gx_tx_interrupts;
int gx_rx_interrupts;
int gx_interrupts;
};
/*
* flags to compensate for differing chip variants
*/
#define GXF_FORCE_TBI 0x0001 /* force TBI mode on */
#define GXF_DMA 0x0002 /* has DMA control registers */
#define GXF_ENABLE_MWI 0x0004 /* supports MWI burst mode */
#define GXF_OLD_REGS 0x0008 /* use old register mapping */
#define GXF_CSUM 0x0010 /* hardware checksum offload */
#define GXF_WISEMAN 0x0020 /* Wiseman variant */
#define GXF_LIVENGOOD 0x0040 /* Livengood variant */
#define GXF_CORDOVA 0x0080 /* Cordova variant */
/*
* TX Context definitions.
*/
#define GX_TXCONTEXT_NONE 0
#define GX_TXCONTEXT_TCPIP 1
#define GX_TXCONTEXT_UDPIP 2
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