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cb2f755c7f
freebsd/sys/dev/nge/if_nge.c
Bill Paul cb2f755c7f Fix the last serious bug I've been chasing: 
The DP83820/83821 has an undocumented limitation concerning jumbo frames
and TX checksum offload. In order for TX checksum offload to work, the
outgoing frame must fit entirely within the TX FIFO, which is 8192 bytes
in size. This isn't a problem, until you try to send a 9000-byte frame,
at which point the TX DMA engine goes to sleep. It turns out that if
you want to send a jumbo frame larger than 8170 bytes (8192 - 64), you
have to turn off the TX checksum support.

As a workaround, I changed nge_ioctl() so that if the user selects an
MTU larger than 8152 bytes, we clear the if_hwassist flags. The flags
will be set again once the MTU is reduced to a smaller value.
2001-06-16 03:38:44 +00:00

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/*
* Copyright (c) 2001 Wind River Systems
* Copyright (c) 1997, 1998, 1999, 2000, 2001
* Bill Paul <wpaul@bsdi.com>. 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 Bill Paul.
* 4. 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 Bill Paul 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 Bill Paul OR THE VOICES IN HIS HEAD
* 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.
*
* $FreeBSD$
*/
/*
* National Semiconductor DP83820/DP83821 gigabit ethernet driver
* for FreeBSD. Datasheets are available from:
*
* http://www.national.com/ds/DP/DP83820.pdf
* http://www.national.com/ds/DP/DP83821.pdf
*
* These chips are used on several low cost gigabit ethernet NICs
* sold by D-Link, Addtron, SMC and Asante. Both parts are
* virtually the same, except the 83820 is a 64-bit/32-bit part,
* while the 83821 is 32-bit only.
*
* Many cards also use National gigE transceivers, such as the
* DP83891, DP83861 and DP83862 gigPHYTER parts. The DP83861 datasheet
* contains a full register description that applies to all of these
* components:
*
* http://www.national.com/ds/DP/DP83861.pdf
*
* Written by Bill Paul <wpaul@bsdi.com>
* BSDi Open Source Solutions
*/
/*
* The NatSemi DP83820 and 83821 controllers are enhanced versions
* of the NatSemi MacPHYTER 10/100 devices. They support 10, 100
* and 1000Mbps speeds with 1000baseX (ten bit interface), MII and GMII
* ports. Other features include 8K TX FIFO and 32K RX FIFO, TCP/IP
* hardware checksum offload (IPv4 only), VLAN tagging and filtering,
* priority TX and RX queues, a 2048 bit multicast hash filter, 4 RX pattern
* matching buffers, one perfect address filter buffer and interrupt
* moderation. The 83820 supports both 64-bit and 32-bit addressing
* and data transfers: the 64-bit support can be toggled on or off
* via software. This affects the size of certain fields in the DMA
* descriptors.
*
* There are two bugs/misfeatures in the 83820/83821 that I have
* discovered so far:
*
* - Receive buffers must be aligned on 64-bit boundaries, which means
* you must resort to copying data in order to fix up the payload
* alignment.
*
* - In order to transmit jumbo frames larger than 8170 bytes, you have
* to turn off transmit checksum offloading, because the chip can't
* compute the checksum on an outgoing frame unless it fits entirely
* within the TX FIFO, which is only 8192 bytes in size. If you have
* TX checksum offload enabled and you transmit attempt to transmit a
* frame larger than 8170 bytes, the transmitter will wedge.
*
* To work around the latter problem, TX checksum offload is disabled
* if the user selects an MTU larger than 8152 (8170 - 18).
*/
#include "vlan.h"
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/sockio.h>
#include <sys/mbuf.h>
#include <sys/malloc.h>
#include <sys/kernel.h>
#include <sys/socket.h>
#include <net/if.h>
#include <net/if_arp.h>
#include <net/ethernet.h>
#include <net/if_dl.h>
#include <net/if_media.h>
#if NVLAN > 0
#include <net/if_types.h>
#include <net/if_vlan_var.h>
#endif
#include <net/bpf.h>
#include <vm/vm.h> /* for vtophys */
#include <vm/pmap.h> /* for vtophys */
#include <machine/clock.h> /* for DELAY */
#include <machine/bus_pio.h>
#include <machine/bus_memio.h>
#include <machine/bus.h>
#include <machine/resource.h>
#include <sys/bus.h>
#include <sys/rman.h>
#include <dev/mii/mii.h>
#include <dev/mii/miivar.h>
#include <pci/pcireg.h>
#include <pci/pcivar.h>
#define NGE_USEIOSPACE
#include <dev/nge/if_ngereg.h>
MODULE_DEPEND(nge, miibus, 1, 1, 1);
/* "controller miibus0" required. See GENERIC if you get errors here. */
#include "miibus_if.h"
#ifndef lint
static const char rcsid[] =
"$FreeBSD$";
#endif
#define NGE_CSUM_FEATURES (CSUM_IP | CSUM_TCP | CSUM_UDP)
/*
* Various supported device vendors/types and their names.
*/
static struct nge_type nge_devs[] = {
{ NGE_VENDORID, NGE_DEVICEID,
"National Semiconductor Gigabit Ethernet" },
{ 0, 0, NULL }
};
static int nge_probe __P((device_t));
static int nge_attach __P((device_t));
static int nge_detach __P((device_t));
static int nge_alloc_jumbo_mem __P((struct nge_softc *));
static void nge_free_jumbo_mem __P((struct nge_softc *));
static void *nge_jalloc __P((struct nge_softc *));
static void nge_jfree __P((caddr_t, void *));
static int nge_newbuf __P((struct nge_softc *,
struct nge_desc *,
struct mbuf *));
static int nge_encap __P((struct nge_softc *,
struct mbuf *, u_int32_t *));
static void nge_rxeof __P((struct nge_softc *));
static void nge_rxeoc __P((struct nge_softc *));
static void nge_txeof __P((struct nge_softc *));
static void nge_intr __P((void *));
static void nge_tick __P((void *));
static void nge_start __P((struct ifnet *));
static int nge_ioctl __P((struct ifnet *, u_long, caddr_t));
static void nge_init __P((void *));
static void nge_stop __P((struct nge_softc *));
static void nge_watchdog __P((struct ifnet *));
static void nge_shutdown __P((device_t));
static int nge_ifmedia_upd __P((struct ifnet *));
static void nge_ifmedia_sts __P((struct ifnet *, struct ifmediareq *));
static void nge_delay __P((struct nge_softc *));
static void nge_eeprom_idle __P((struct nge_softc *));
static void nge_eeprom_putbyte __P((struct nge_softc *, int));
static void nge_eeprom_getword __P((struct nge_softc *, int, u_int16_t *));
static void nge_read_eeprom __P((struct nge_softc *, caddr_t, int,
int, int));
static void nge_mii_sync __P((struct nge_softc *));
static void nge_mii_send __P((struct nge_softc *, u_int32_t, int));
static int nge_mii_readreg __P((struct nge_softc *,
struct nge_mii_frame *));
static int nge_mii_writereg __P((struct nge_softc *,
struct nge_mii_frame *));
static int nge_miibus_readreg __P((device_t, int, int));
static int nge_miibus_writereg __P((device_t, int, int, int));
static void nge_miibus_statchg __P((device_t));
static void nge_setmulti __P((struct nge_softc *));
static u_int32_t nge_crc __P((struct nge_softc *, caddr_t));
static void nge_reset __P((struct nge_softc *));
static int nge_list_rx_init __P((struct nge_softc *));
static int nge_list_tx_init __P((struct nge_softc *));
#ifdef NGE_USEIOSPACE
#define NGE_RES SYS_RES_IOPORT
#define NGE_RID NGE_PCI_LOIO
#else
#define NGE_RES SYS_RES_MEMORY
#define NGE_RID NGE_PCI_LOMEM
#endif
static device_method_t nge_methods[] = {
/* Device interface */
DEVMETHOD(device_probe, nge_probe),
DEVMETHOD(device_attach, nge_attach),
DEVMETHOD(device_detach, nge_detach),
DEVMETHOD(device_shutdown, nge_shutdown),
/* bus interface */
DEVMETHOD(bus_print_child, bus_generic_print_child),
DEVMETHOD(bus_driver_added, bus_generic_driver_added),
/* MII interface */
DEVMETHOD(miibus_readreg, nge_miibus_readreg),
DEVMETHOD(miibus_writereg, nge_miibus_writereg),
DEVMETHOD(miibus_statchg, nge_miibus_statchg),
{ 0, 0 }
};
static driver_t nge_driver = {
"nge",
nge_methods,
sizeof(struct nge_softc)
};
static devclass_t nge_devclass;
DRIVER_MODULE(if_nge, pci, nge_driver, nge_devclass, 0, 0);
DRIVER_MODULE(miibus, nge, miibus_driver, miibus_devclass, 0, 0);
#define NGE_SETBIT(sc, reg, x) \
CSR_WRITE_4(sc, reg, \
CSR_READ_4(sc, reg) | (x))
#define NGE_CLRBIT(sc, reg, x) \
CSR_WRITE_4(sc, reg, \
CSR_READ_4(sc, reg) & ~(x))
#define SIO_SET(x) \
CSR_WRITE_4(sc, NGE_MEAR, CSR_READ_4(sc, NGE_MEAR) | x)
#define SIO_CLR(x) \
CSR_WRITE_4(sc, NGE_MEAR, CSR_READ_4(sc, NGE_MEAR) & ~x)
static void nge_delay(sc)
struct nge_softc *sc;
{
int idx;
for (idx = (300 / 33) + 1; idx > 0; idx--)
CSR_READ_4(sc, NGE_CSR);
return;
}
static void nge_eeprom_idle(sc)
struct nge_softc *sc;
{
register int i;
SIO_SET(NGE_MEAR_EE_CSEL);
nge_delay(sc);
SIO_SET(NGE_MEAR_EE_CLK);
nge_delay(sc);
for (i = 0; i < 25; i++) {
SIO_CLR(NGE_MEAR_EE_CLK);
nge_delay(sc);
SIO_SET(NGE_MEAR_EE_CLK);
nge_delay(sc);
}
SIO_CLR(NGE_MEAR_EE_CLK);
nge_delay(sc);
SIO_CLR(NGE_MEAR_EE_CSEL);
nge_delay(sc);
CSR_WRITE_4(sc, NGE_MEAR, 0x00000000);
return;
}
/*
* Send a read command and address to the EEPROM, check for ACK.
*/
static void nge_eeprom_putbyte(sc, addr)
struct nge_softc *sc;
int addr;
{
register int d, i;
d = addr | NGE_EECMD_READ;
/*
* Feed in each bit and stobe the clock.
*/
for (i = 0x400; i; i >>= 1) {
if (d & i) {
SIO_SET(NGE_MEAR_EE_DIN);
} else {
SIO_CLR(NGE_MEAR_EE_DIN);
}
nge_delay(sc);
SIO_SET(NGE_MEAR_EE_CLK);
nge_delay(sc);
SIO_CLR(NGE_MEAR_EE_CLK);
nge_delay(sc);
}
return;
}
/*
* Read a word of data stored in the EEPROM at address 'addr.'
*/
static void nge_eeprom_getword(sc, addr, dest)
struct nge_softc *sc;
int addr;
u_int16_t *dest;
{
register int i;
u_int16_t word = 0;
/* Force EEPROM to idle state. */
nge_eeprom_idle(sc);
/* Enter EEPROM access mode. */
nge_delay(sc);
SIO_CLR(NGE_MEAR_EE_CLK);
nge_delay(sc);
SIO_SET(NGE_MEAR_EE_CSEL);
nge_delay(sc);
/*
* Send address of word we want to read.
*/
nge_eeprom_putbyte(sc, addr);
/*
* Start reading bits from EEPROM.
*/
for (i = 0x8000; i; i >>= 1) {
SIO_SET(NGE_MEAR_EE_CLK);
nge_delay(sc);
if (CSR_READ_4(sc, NGE_MEAR) & NGE_MEAR_EE_DOUT)
word |= i;
nge_delay(sc);
SIO_CLR(NGE_MEAR_EE_CLK);
nge_delay(sc);
}
/* Turn off EEPROM access mode. */
nge_eeprom_idle(sc);
*dest = word;
return;
}
/*
* Read a sequence of words from the EEPROM.
*/
static void nge_read_eeprom(sc, dest, off, cnt, swap)
struct nge_softc *sc;
caddr_t dest;
int off;
int cnt;
int swap;
{
int i;
u_int16_t word = 0, *ptr;
for (i = 0; i < cnt; i++) {
nge_eeprom_getword(sc, off + i, &word);
ptr = (u_int16_t *)(dest + (i * 2));
if (swap)
*ptr = ntohs(word);
else
*ptr = word;
}
return;
}
/*
* Sync the PHYs by setting data bit and strobing the clock 32 times.
*/
static void nge_mii_sync(sc)
struct nge_softc *sc;
{
register int i;
SIO_SET(NGE_MEAR_MII_DIR|NGE_MEAR_MII_DATA);
for (i = 0; i < 32; i++) {
SIO_SET(NGE_MEAR_MII_CLK);
DELAY(1);
SIO_CLR(NGE_MEAR_MII_CLK);
DELAY(1);
}
return;
}
/*
* Clock a series of bits through the MII.
*/
static void nge_mii_send(sc, bits, cnt)
struct nge_softc *sc;
u_int32_t bits;
int cnt;
{
int i;
SIO_CLR(NGE_MEAR_MII_CLK);
for (i = (0x1 << (cnt - 1)); i; i >>= 1) {
if (bits & i) {
SIO_SET(NGE_MEAR_MII_DATA);
} else {
SIO_CLR(NGE_MEAR_MII_DATA);
}
DELAY(1);
SIO_CLR(NGE_MEAR_MII_CLK);
DELAY(1);
SIO_SET(NGE_MEAR_MII_CLK);
}
}
/*
* Read an PHY register through the MII.
*/
static int nge_mii_readreg(sc, frame)
struct nge_softc *sc;
struct nge_mii_frame *frame;
{
int i, ack, s;
s = splimp();
/*
* Set up frame for RX.
*/
frame->mii_stdelim = NGE_MII_STARTDELIM;
frame->mii_opcode = NGE_MII_READOP;
frame->mii_turnaround = 0;
frame->mii_data = 0;
CSR_WRITE_4(sc, NGE_MEAR, 0);
/*
* Turn on data xmit.
*/
SIO_SET(NGE_MEAR_MII_DIR);
nge_mii_sync(sc);
/*
* Send command/address info.
*/
nge_mii_send(sc, frame->mii_stdelim, 2);
nge_mii_send(sc, frame->mii_opcode, 2);
nge_mii_send(sc, frame->mii_phyaddr, 5);
nge_mii_send(sc, frame->mii_regaddr, 5);
/* Idle bit */
SIO_CLR((NGE_MEAR_MII_CLK|NGE_MEAR_MII_DATA));
DELAY(1);
SIO_SET(NGE_MEAR_MII_CLK);
DELAY(1);
/* Turn off xmit. */
SIO_CLR(NGE_MEAR_MII_DIR);
/* Check for ack */
SIO_CLR(NGE_MEAR_MII_CLK);
DELAY(1);
SIO_SET(NGE_MEAR_MII_CLK);
DELAY(1);
ack = CSR_READ_4(sc, NGE_MEAR) & NGE_MEAR_MII_DATA;
/*
* Now try reading data bits. If the ack failed, we still
* need to clock through 16 cycles to keep the PHY(s) in sync.
*/
if (ack) {
for(i = 0; i < 16; i++) {
SIO_CLR(NGE_MEAR_MII_CLK);
DELAY(1);
SIO_SET(NGE_MEAR_MII_CLK);
DELAY(1);
}
goto fail;
}
for (i = 0x8000; i; i >>= 1) {
SIO_CLR(NGE_MEAR_MII_CLK);
DELAY(1);
if (!ack) {
if (CSR_READ_4(sc, NGE_MEAR) & NGE_MEAR_MII_DATA)
frame->mii_data |= i;
DELAY(1);
}
SIO_SET(NGE_MEAR_MII_CLK);
DELAY(1);
}
fail:
SIO_CLR(NGE_MEAR_MII_CLK);
DELAY(1);
SIO_SET(NGE_MEAR_MII_CLK);
DELAY(1);
splx(s);
if (ack)
return(1);
return(0);
}
/*
* Write to a PHY register through the MII.
*/
static int nge_mii_writereg(sc, frame)
struct nge_softc *sc;
struct nge_mii_frame *frame;
{
int s;
s = splimp();
/*
* Set up frame for TX.
*/
frame->mii_stdelim = NGE_MII_STARTDELIM;
frame->mii_opcode = NGE_MII_WRITEOP;
frame->mii_turnaround = NGE_MII_TURNAROUND;
/*
* Turn on data output.
*/
SIO_SET(NGE_MEAR_MII_DIR);
nge_mii_sync(sc);
nge_mii_send(sc, frame->mii_stdelim, 2);
nge_mii_send(sc, frame->mii_opcode, 2);
nge_mii_send(sc, frame->mii_phyaddr, 5);
nge_mii_send(sc, frame->mii_regaddr, 5);
nge_mii_send(sc, frame->mii_turnaround, 2);
nge_mii_send(sc, frame->mii_data, 16);
/* Idle bit. */
SIO_SET(NGE_MEAR_MII_CLK);
DELAY(1);
SIO_CLR(NGE_MEAR_MII_CLK);
DELAY(1);
/*
* Turn off xmit.
*/
SIO_CLR(NGE_MEAR_MII_DIR);
splx(s);
return(0);
}
static int nge_miibus_readreg(dev, phy, reg)
device_t dev;
int phy, reg;
{
struct nge_softc *sc;
struct nge_mii_frame frame;
sc = device_get_softc(dev);
bzero((char *)&frame, sizeof(frame));
frame.mii_phyaddr = phy;
frame.mii_regaddr = reg;
nge_mii_readreg(sc, &frame);
return(frame.mii_data);
}
static int nge_miibus_writereg(dev, phy, reg, data)
device_t dev;
int phy, reg, data;
{
struct nge_softc *sc;
struct nge_mii_frame frame;
sc = device_get_softc(dev);
bzero((char *)&frame, sizeof(frame));
frame.mii_phyaddr = phy;
frame.mii_regaddr = reg;
frame.mii_data = data;
nge_mii_writereg(sc, &frame);
return(0);
}
static void nge_miibus_statchg(dev)
device_t dev;
{
struct nge_softc *sc;
struct mii_data *mii;
sc = device_get_softc(dev);
mii = device_get_softc(sc->nge_miibus);
if ((mii->mii_media_active & IFM_GMASK) == IFM_FDX) {
NGE_SETBIT(sc, NGE_TX_CFG,
(NGE_TXCFG_IGN_HBEAT|NGE_TXCFG_IGN_CARR));
NGE_SETBIT(sc, NGE_RX_CFG, NGE_RXCFG_RX_FDX);
} else {
NGE_CLRBIT(sc, NGE_TX_CFG,
(NGE_TXCFG_IGN_HBEAT|NGE_TXCFG_IGN_CARR));
NGE_CLRBIT(sc, NGE_RX_CFG, NGE_RXCFG_RX_FDX);
}
return;
}
static u_int32_t nge_crc(sc, addr)
struct nge_softc *sc;
caddr_t addr;
{
u_int32_t crc, carry;
int i, j;
u_int8_t c;
/* Compute CRC for the address value. */
crc = 0xFFFFFFFF; /* initial value */
for (i = 0; i < 6; i++) {
c = *(addr + i);
for (j = 0; j < 8; j++) {
carry = ((crc & 0x80000000) ? 1 : 0) ^ (c & 0x01);
crc <<= 1;
c >>= 1;
if (carry)
crc = (crc ^ 0x04c11db6) | carry;
}
}
/*
* return the filter bit position
*/
return((crc >> 21) & 0x00000FFF);
}
static void nge_setmulti(sc)
struct nge_softc *sc;
{
struct ifnet *ifp;
struct ifmultiaddr *ifma;
u_int32_t h = 0, i, filtsave;
int bit, index;
ifp = &sc->arpcom.ac_if;
if (ifp->if_flags & IFF_ALLMULTI || ifp->if_flags & IFF_PROMISC) {
NGE_CLRBIT(sc, NGE_RXFILT_CTL,
NGE_RXFILTCTL_MCHASH|NGE_RXFILTCTL_UCHASH);
NGE_SETBIT(sc, NGE_RXFILT_CTL, NGE_RXFILTCTL_ALLMULTI);
return;
}
/*
* We have to explicitly enable the multicast hash table
* on the NatSemi chip if we want to use it, which we do.
* We also have to tell it that we don't want to use the
* hash table for matching unicast addresses.
*/
NGE_SETBIT(sc, NGE_RXFILT_CTL, NGE_RXFILTCTL_MCHASH);
NGE_CLRBIT(sc, NGE_RXFILT_CTL,
NGE_RXFILTCTL_ALLMULTI|NGE_RXFILTCTL_UCHASH);
filtsave = CSR_READ_4(sc, NGE_RXFILT_CTL);
/* first, zot all the existing hash bits */
for (i = 0; i < NGE_MCAST_FILTER_LEN; i += 2) {
CSR_WRITE_4(sc, NGE_RXFILT_CTL, NGE_FILTADDR_MCAST_LO + i);
CSR_WRITE_4(sc, NGE_RXFILT_DATA, 0);
}
/*
* From the 11 bits returned by the crc routine, the top 7
* bits represent the 16-bit word in the mcast hash table
* that needs to be updated, and the lower 4 bits represent
* which bit within that byte needs to be set.
*/
TAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) {
if (ifma->ifma_addr->sa_family != AF_LINK)
continue;
h = nge_crc(sc, LLADDR((struct sockaddr_dl *)ifma->ifma_addr));
index = (h >> 4) & 0x7F;
bit = h & 0xF;
CSR_WRITE_4(sc, NGE_RXFILT_CTL,
NGE_FILTADDR_MCAST_LO + (index * 2));
NGE_SETBIT(sc, NGE_RXFILT_DATA, (1 << bit));
}
CSR_WRITE_4(sc, NGE_RXFILT_CTL, filtsave);
return;
}
static void nge_reset(sc)
struct nge_softc *sc;
{
register int i;
NGE_SETBIT(sc, NGE_CSR, NGE_CSR_RESET);
for (i = 0; i < NGE_TIMEOUT; i++) {
if (!(CSR_READ_4(sc, NGE_CSR) & NGE_CSR_RESET))
break;
}
if (i == NGE_TIMEOUT)
printf("nge%d: reset never completed\n", sc->nge_unit);
/* Wait a little while for the chip to get its brains in order. */
DELAY(1000);
/*
* If this is a NetSemi chip, make sure to clear
* PME mode.
*/
CSR_WRITE_4(sc, NGE_CLKRUN, NGE_CLKRUN_PMESTS);
CSR_WRITE_4(sc, NGE_CLKRUN, 0);
return;
}
/*
* Probe for an NatSemi chip. Check the PCI vendor and device
* IDs against our list and return a device name if we find a match.
*/
static int nge_probe(dev)
device_t dev;
{
struct nge_type *t;
t = nge_devs;
while(t->nge_name != NULL) {
if ((pci_get_vendor(dev) == t->nge_vid) &&
(pci_get_device(dev) == t->nge_did)) {
device_set_desc(dev, t->nge_name);
return(0);
}
t++;
}
return(ENXIO);
}
/*
* Attach the interface. Allocate softc structures, do ifmedia
* setup and ethernet/BPF attach.
*/
static int nge_attach(dev)
device_t dev;
{
int s;
u_char eaddr[ETHER_ADDR_LEN];
u_int32_t command;
struct nge_softc *sc;
struct ifnet *ifp;
int unit, error = 0, rid;
s = splimp();
sc = device_get_softc(dev);
unit = device_get_unit(dev);
bzero(sc, sizeof(struct nge_softc));
mtx_init(&sc->nge_mtx, device_get_nameunit(dev), MTX_DEF|MTX_RECURSE);
/*
* Handle power management nonsense.
*/
if (pci_get_powerstate(dev) != PCI_POWERSTATE_D0) {
u_int32_t iobase, membase, irq;
/* Save important PCI config data. */
iobase = pci_read_config(dev, NGE_PCI_LOIO, 4);
membase = pci_read_config(dev, NGE_PCI_LOMEM, 4);
irq = pci_read_config(dev, NGE_PCI_INTLINE, 4);
/* Reset the power state. */
printf("nge%d: chip is in D%d power mode "
"-- setting to D0\n", unit,
pci_get_powerstate(dev));
pci_set_powerstate(dev, PCI_POWERSTATE_D0);
/* Restore PCI config data. */
pci_write_config(dev, NGE_PCI_LOIO, iobase, 4);
pci_write_config(dev, NGE_PCI_LOMEM, membase, 4);
pci_write_config(dev, NGE_PCI_INTLINE, irq, 4);
}
/*
* Map control/status registers.
*/
pci_enable_busmaster(dev);
pci_enable_io(dev, PCIM_CMD_PORTEN);
pci_enable_io(dev, PCIM_CMD_MEMEN);
command = pci_read_config(dev, PCIR_COMMAND, 4);
#ifdef NGE_USEIOSPACE
if (!(command & PCIM_CMD_PORTEN)) {
printf("nge%d: failed to enable I/O ports!\n", unit);
error = ENXIO;;
goto fail;
}
#else
if (!(command & PCIM_CMD_MEMEN)) {
printf("nge%d: failed to enable memory mapping!\n", unit);
error = ENXIO;;
goto fail;
}
#endif
rid = NGE_RID;
sc->nge_res = bus_alloc_resource(dev, NGE_RES, &rid,
0, ~0, 1, RF_ACTIVE);
if (sc->nge_res == NULL) {
printf("nge%d: couldn't map ports/memory\n", unit);
error = ENXIO;
goto fail;
}
sc->nge_btag = rman_get_bustag(sc->nge_res);
sc->nge_bhandle = rman_get_bushandle(sc->nge_res);
/* Allocate interrupt */
rid = 0;
sc->nge_irq = bus_alloc_resource(dev, SYS_RES_IRQ, &rid, 0, ~0, 1,
RF_SHAREABLE | RF_ACTIVE);
if (sc->nge_irq == NULL) {
printf("nge%d: couldn't map interrupt\n", unit);
bus_release_resource(dev, NGE_RES, NGE_RID, sc->nge_res);
error = ENXIO;
goto fail;
}
error = bus_setup_intr(dev, sc->nge_irq, INTR_TYPE_NET,
nge_intr, sc, &sc->nge_intrhand);
if (error) {
bus_release_resource(dev, SYS_RES_IRQ, 0, sc->nge_irq);
bus_release_resource(dev, NGE_RES, NGE_RID, sc->nge_res);
printf("nge%d: couldn't set up irq\n", unit);
goto fail;
}
/* Reset the adapter. */
nge_reset(sc);
/*
* Get station address from the EEPROM.
*/
nge_read_eeprom(sc, (caddr_t)&eaddr[4], NGE_EE_NODEADDR, 1, 0);
nge_read_eeprom(sc, (caddr_t)&eaddr[2], NGE_EE_NODEADDR + 1, 1, 0);
nge_read_eeprom(sc, (caddr_t)&eaddr[0], NGE_EE_NODEADDR + 2, 1, 0);
/*
* A NatSemi chip was detected. Inform the world.
*/
printf("nge%d: Ethernet address: %6D\n", unit, eaddr, ":");
sc->nge_unit = unit;
bcopy(eaddr, (char *)&sc->arpcom.ac_enaddr, ETHER_ADDR_LEN);
sc->nge_ldata = contigmalloc(sizeof(struct nge_list_data), M_DEVBUF,
M_NOWAIT, 0, 0xffffffff, PAGE_SIZE, 0);
if (sc->nge_ldata == NULL) {
printf("nge%d: no memory for list buffers!\n", unit);
bus_teardown_intr(dev, sc->nge_irq, sc->nge_intrhand);
bus_release_resource(dev, SYS_RES_IRQ, 0, sc->nge_irq);
bus_release_resource(dev, NGE_RES, NGE_RID, sc->nge_res);
error = ENXIO;
goto fail;
}
bzero(sc->nge_ldata, sizeof(struct nge_list_data));
/* Try to allocate memory for jumbo buffers. */
if (nge_alloc_jumbo_mem(sc)) {
printf("nge%d: jumbo buffer allocation failed\n",
sc->nge_unit);
contigfree(sc->nge_ldata,
sizeof(struct nge_list_data), M_DEVBUF);
bus_teardown_intr(dev, sc->nge_irq, sc->nge_intrhand);
bus_release_resource(dev, SYS_RES_IRQ, 0, sc->nge_irq);
bus_release_resource(dev, NGE_RES, NGE_RID, sc->nge_res);
error = ENXIO;
goto fail;
}
ifp = &sc->arpcom.ac_if;
ifp->if_softc = sc;
ifp->if_unit = unit;
ifp->if_name = "nge";
ifp->if_mtu = ETHERMTU;
ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST;
ifp->if_ioctl = nge_ioctl;
ifp->if_output = ether_output;
ifp->if_start = nge_start;
ifp->if_watchdog = nge_watchdog;
ifp->if_init = nge_init;
ifp->if_baudrate = 1000000000;
ifp->if_snd.ifq_maxlen = NGE_TX_LIST_CNT - 1;
ifp->if_hwassist = NGE_CSUM_FEATURES;
/*
* Do MII setup.
*/
if (mii_phy_probe(dev, &sc->nge_miibus,
nge_ifmedia_upd, nge_ifmedia_sts)) {
printf("nge%d: MII without any PHY!\n", sc->nge_unit);
nge_free_jumbo_mem(sc);
bus_teardown_intr(dev, sc->nge_irq, sc->nge_intrhand);
bus_release_resource(dev, SYS_RES_IRQ, 0, sc->nge_irq);
bus_release_resource(dev, NGE_RES, NGE_RID, sc->nge_res);
error = ENXIO;
goto fail;
}
/*
* Call MI attach routine.
*/
ether_ifattach(ifp, ETHER_BPF_SUPPORTED);
callout_handle_init(&sc->nge_stat_ch);
fail:
splx(s);
mtx_destroy(&sc->nge_mtx);
return(error);
}
static int nge_detach(dev)
device_t dev;
{
struct nge_softc *sc;
struct ifnet *ifp;
int s;
s = splimp();
sc = device_get_softc(dev);
ifp = &sc->arpcom.ac_if;
nge_reset(sc);
nge_stop(sc);
ether_ifdetach(ifp, ETHER_BPF_SUPPORTED);
bus_generic_detach(dev);
device_delete_child(dev, sc->nge_miibus);
bus_teardown_intr(dev, sc->nge_irq, sc->nge_intrhand);
bus_release_resource(dev, SYS_RES_IRQ, 0, sc->nge_irq);
bus_release_resource(dev, NGE_RES, NGE_RID, sc->nge_res);
contigfree(sc->nge_ldata, sizeof(struct nge_list_data), M_DEVBUF);
nge_free_jumbo_mem(sc);
splx(s);
mtx_destroy(&sc->nge_mtx);
return(0);
}
/*
* Initialize the transmit descriptors.
*/
static int nge_list_tx_init(sc)
struct nge_softc *sc;
{
struct nge_list_data *ld;
struct nge_ring_data *cd;
int i;
cd = &sc->nge_cdata;
ld = sc->nge_ldata;
for (i = 0; i < NGE_TX_LIST_CNT; i++) {
if (i == (NGE_TX_LIST_CNT - 1)) {
ld->nge_tx_list[i].nge_nextdesc =
&ld->nge_tx_list[0];
ld->nge_tx_list[i].nge_next =
vtophys(&ld->nge_tx_list[0]);
} else {
ld->nge_tx_list[i].nge_nextdesc =
&ld->nge_tx_list[i + 1];
ld->nge_tx_list[i].nge_next =
vtophys(&ld->nge_tx_list[i + 1]);
}
ld->nge_tx_list[i].nge_mbuf = NULL;
ld->nge_tx_list[i].nge_ptr = 0;
ld->nge_tx_list[i].nge_ctl = 0;
}
cd->nge_tx_prod = cd->nge_tx_cons = cd->nge_tx_cnt = 0;
return(0);
}
/*
* Initialize the RX descriptors and allocate mbufs for them. Note that
* we arrange the descriptors in a closed ring, so that the last descriptor
* points back to the first.
*/
static int nge_list_rx_init(sc)
struct nge_softc *sc;
{
struct nge_list_data *ld;
struct nge_ring_data *cd;
int i;
ld = sc->nge_ldata;
cd = &sc->nge_cdata;
for (i = 0; i < NGE_RX_LIST_CNT; i++) {
if (nge_newbuf(sc, &ld->nge_rx_list[i], NULL) == ENOBUFS)
return(ENOBUFS);
if (i == (NGE_RX_LIST_CNT - 1)) {
ld->nge_rx_list[i].nge_nextdesc =
&ld->nge_rx_list[0];
ld->nge_rx_list[i].nge_next =
vtophys(&ld->nge_rx_list[0]);
} else {
ld->nge_rx_list[i].nge_nextdesc =
&ld->nge_rx_list[i + 1];
ld->nge_rx_list[i].nge_next =
vtophys(&ld->nge_rx_list[i + 1]);
}
}
cd->nge_rx_prod = 0;
return(0);
}
/*
* Initialize an RX descriptor and attach an MBUF cluster.
*/
static int nge_newbuf(sc, c, m)
struct nge_softc *sc;
struct nge_desc *c;
struct mbuf *m;
{
struct mbuf *m_new = NULL;
caddr_t *buf = NULL;
if (m == NULL) {
MGETHDR(m_new, M_DONTWAIT, MT_DATA);
if (m_new == NULL) {
printf("nge%d: no memory for rx list "
"-- packet dropped!\n", sc->nge_unit);
return(ENOBUFS);
}
/* Allocate the jumbo buffer */
buf = nge_jalloc(sc);
if (buf == NULL) {
#ifdef NGE_VERBOSE
printf("nge%d: jumbo allocation failed "
"-- packet dropped!\n", sc->nge_unit);
#endif
m_freem(m_new);
return(ENOBUFS);
}
/* Attach the buffer to the mbuf */
m_new->m_data = (void *)buf;
m_new->m_len = m_new->m_pkthdr.len = NGE_MCLBYTES;
MEXTADD(m_new, buf, NGE_MCLBYTES, nge_jfree,
(struct nge_softc *)sc, 0, EXT_NET_DRV);
} else {
m_new = m;
m_new->m_len = m_new->m_pkthdr.len = NGE_MCLBYTES;
m_new->m_data = m_new->m_ext.ext_buf;
}
m_adj(m_new, sizeof(u_int64_t));
c->nge_mbuf = m_new;
c->nge_ptr = vtophys(mtod(m_new, caddr_t));
c->nge_ctl = m_new->m_len;
c->nge_extsts = 0;
return(0);
}
static int nge_alloc_jumbo_mem(sc)
struct nge_softc *sc;
{
caddr_t ptr;
register int i;
struct nge_jpool_entry *entry;
/* Grab a big chunk o' storage. */
sc->nge_cdata.nge_jumbo_buf = contigmalloc(NGE_JMEM, M_DEVBUF,
M_NOWAIT, 0, 0xffffffff, PAGE_SIZE, 0);
if (sc->nge_cdata.nge_jumbo_buf == NULL) {
printf("nge%d: no memory for jumbo buffers!\n", sc->nge_unit);
return(ENOBUFS);
}
SLIST_INIT(&sc->nge_jfree_listhead);
SLIST_INIT(&sc->nge_jinuse_listhead);
/*
* Now divide it up into 9K pieces and save the addresses
* in an array.
*/
ptr = sc->nge_cdata.nge_jumbo_buf;
for (i = 0; i < NGE_JSLOTS; i++) {
sc->nge_cdata.nge_jslots[i] = ptr;
ptr += NGE_MCLBYTES;
entry = malloc(sizeof(struct nge_jpool_entry),
M_DEVBUF, M_NOWAIT);
if (entry == NULL) {
free(sc->nge_cdata.nge_jumbo_buf, M_DEVBUF);
sc->nge_cdata.nge_jumbo_buf = NULL;
printf("nge%d: no memory for jumbo "
"buffer queue!\n", sc->nge_unit);
return(ENOBUFS);
}
entry->slot = i;
SLIST_INSERT_HEAD(&sc->nge_jfree_listhead,
entry, jpool_entries);
}
return(0);
}
static void nge_free_jumbo_mem(sc)
struct nge_softc *sc;
{
register int i;
struct nge_jpool_entry *entry;
for (i = 0; i < NGE_JSLOTS; i++) {
entry = SLIST_FIRST(&sc->nge_jfree_listhead);
free(entry, M_DEVBUF);
SLIST_REMOVE_HEAD(&sc->nge_jfree_listhead, jpool_entries);
}
contigfree(sc->nge_cdata.nge_jumbo_buf, NGE_JMEM, M_DEVBUF);
return;
}
/*
* Allocate a jumbo buffer.
*/
static void *nge_jalloc(sc)
struct nge_softc *sc;
{
struct nge_jpool_entry *entry;
entry = SLIST_FIRST(&sc->nge_jfree_listhead);
if (entry == NULL) {
#ifdef NGE_VERBOSE
printf("nge%d: no free jumbo buffers\n", sc->nge_unit);
#endif
return(NULL);
}
SLIST_REMOVE_HEAD(&sc->nge_jfree_listhead, jpool_entries);
SLIST_INSERT_HEAD(&sc->nge_jinuse_listhead, entry, jpool_entries);
return(sc->nge_cdata.nge_jslots[entry->slot]);
}
/*
* Release a jumbo buffer.
*/
static void nge_jfree(buf, args)
caddr_t buf;
void *args;
{
struct nge_softc *sc;
int i;
struct nge_jpool_entry *entry;
/* Extract the softc struct pointer. */
sc = args;
if (sc == NULL)
panic("nge_jfree: can't find softc pointer!");
/* calculate the slot this buffer belongs to */
i = ((vm_offset_t)buf
- (vm_offset_t)sc->nge_cdata.nge_jumbo_buf) / NGE_JLEN;
if ((i < 0) || (i >= NGE_JSLOTS))
panic("nge_jfree: asked to free buffer that we don't manage!");
entry = SLIST_FIRST(&sc->nge_jinuse_listhead);
if (entry == NULL)
panic("nge_jfree: buffer not in use!");
entry->slot = i;
SLIST_REMOVE_HEAD(&sc->nge_jinuse_listhead, jpool_entries);
SLIST_INSERT_HEAD(&sc->nge_jfree_listhead, entry, jpool_entries);
return;
}
/*
* A frame has been uploaded: pass the resulting mbuf chain up to
* the higher level protocols.
*/
static void nge_rxeof(sc)
struct nge_softc *sc;
{
struct ether_header *eh;
struct mbuf *m;
struct ifnet *ifp;
struct nge_desc *cur_rx;
int i, total_len = 0;
u_int32_t rxstat;
ifp = &sc->arpcom.ac_if;
i = sc->nge_cdata.nge_rx_prod;
while(NGE_OWNDESC(&sc->nge_ldata->nge_rx_list[i])) {
struct mbuf *m0 = NULL;
u_int32_t extsts;
cur_rx = &sc->nge_ldata->nge_rx_list[i];
rxstat = cur_rx->nge_rxstat;
extsts = cur_rx->nge_extsts;
m = cur_rx->nge_mbuf;
cur_rx->nge_mbuf = NULL;
total_len = NGE_RXBYTES(cur_rx);
NGE_INC(i, NGE_RX_LIST_CNT);
/*
* If an error occurs, update stats, clear the
* status word and leave the mbuf cluster in place:
* it should simply get re-used next time this descriptor
* comes up in the ring.
*/
if (!(rxstat & NGE_CMDSTS_PKT_OK)) {
ifp->if_ierrors++;
nge_newbuf(sc, cur_rx, m);
continue;
}
/*
* Ok. NatSemi really screwed up here. This is the
* only gigE chip I know of with alignment constraints
* on receive buffers. RX buffers must be 64-bit aligned.
*/
m0 = m_devget(mtod(m, char *) - ETHER_ALIGN,
total_len + ETHER_ALIGN, 0, ifp, NULL);
nge_newbuf(sc, cur_rx, m);
if (m0 == NULL) {
printf("nge%d: no receive buffers "
"available -- packet dropped!\n",
sc->nge_unit);
ifp->if_ierrors++;
continue;
}
m_adj(m0, ETHER_ALIGN);
m = m0;
ifp->if_ipackets++;
eh = mtod(m, struct ether_header *);
/* Remove header from mbuf and pass it on. */
m_adj(m, sizeof(struct ether_header));
/* Do IP checksum checking. */
if (extsts & NGE_RXEXTSTS_IPPKT)
m->m_pkthdr.csum_flags |= CSUM_IP_CHECKED;
if (!(extsts & NGE_RXEXTSTS_IPCSUMERR))
m->m_pkthdr.csum_flags |= CSUM_IP_VALID;
if ((extsts & NGE_RXEXTSTS_TCPPKT &&
!(extsts & NGE_RXEXTSTS_TCPCSUMERR)) ||
(extsts & NGE_RXEXTSTS_UDPPKT &&
!(extsts & NGE_RXEXTSTS_UDPCSUMERR))) {
m->m_pkthdr.csum_flags |=
CSUM_DATA_VALID|CSUM_PSEUDO_HDR;
m->m_pkthdr.csum_data = 0xffff;
}
#if NVLAN > 0
/*
* If we received a packet with a vlan tag, pass it
* to vlan_input() instead of ether_input().
*/
if (extsts & NGE_RXEXTSTS_VLANPKT) {
vlan_input_tag(eh, m, extsts & NGE_RXEXTSTS_VTCI);
continue;
}
#endif
ether_input(ifp, eh, m);
}
sc->nge_cdata.nge_rx_prod = i;
return;
}
void nge_rxeoc(sc)
struct nge_softc *sc;
{
struct ifnet *ifp;
ifp = &sc->arpcom.ac_if;
nge_rxeof(sc);
ifp->if_flags &= ~IFF_RUNNING;
nge_init(sc);
return;
}
/*
* A frame was downloaded to the chip. It's safe for us to clean up
* the list buffers.
*/
static void nge_txeof(sc)
struct nge_softc *sc;
{
struct nge_desc *cur_tx = NULL;
struct ifnet *ifp;
u_int32_t idx;
ifp = &sc->arpcom.ac_if;
/* Clear the timeout timer. */
ifp->if_timer = 0;
/*
* Go through our tx list and free mbufs for those
* frames that have been transmitted.
*/
idx = sc->nge_cdata.nge_tx_cons;
while (idx != sc->nge_cdata.nge_tx_prod) {
cur_tx = &sc->nge_ldata->nge_tx_list[idx];
if (NGE_OWNDESC(cur_tx))
break;
if (cur_tx->nge_ctl & NGE_CMDSTS_MORE) {
sc->nge_cdata.nge_tx_cnt--;
NGE_INC(idx, NGE_TX_LIST_CNT);
continue;
}
if (!(cur_tx->nge_ctl & NGE_CMDSTS_PKT_OK)) {
ifp->if_oerrors++;
if (cur_tx->nge_txstat & NGE_TXSTAT_EXCESSCOLLS)
ifp->if_collisions++;
if (cur_tx->nge_txstat & NGE_TXSTAT_OUTOFWINCOLL)
ifp->if_collisions++;
}
ifp->if_collisions +=
(cur_tx->nge_txstat & NGE_TXSTAT_COLLCNT) >> 16;
ifp->if_opackets++;
if (cur_tx->nge_mbuf != NULL) {
m_freem(cur_tx->nge_mbuf);
cur_tx->nge_mbuf = NULL;
}
sc->nge_cdata.nge_tx_cnt--;
NGE_INC(idx, NGE_TX_LIST_CNT);
ifp->if_timer = 0;
}
sc->nge_cdata.nge_tx_cons = idx;
if (cur_tx != NULL)
ifp->if_flags &= ~IFF_OACTIVE;
return;
}
static void nge_tick(xsc)
void *xsc;
{
struct nge_softc *sc;
struct mii_data *mii;
struct ifnet *ifp;
int s;
s = splimp();
sc = xsc;
ifp = &sc->arpcom.ac_if;
mii = device_get_softc(sc->nge_miibus);
mii_tick(mii);
if (!sc->nge_link) {
mii_pollstat(mii);
if (mii->mii_media_status & IFM_ACTIVE &&
IFM_SUBTYPE(mii->mii_media_active) != IFM_NONE) {
sc->nge_link++;
if (IFM_SUBTYPE(mii->mii_media_active) == IFM_1000_TX)
printf("nge%d: gigabit link up\n",
sc->nge_unit);
if (ifp->if_snd.ifq_head != NULL)
nge_start(ifp);
} else
sc->nge_stat_ch = timeout(nge_tick, sc, hz);
}
splx(s);
return;
}
static void nge_intr(arg)
void *arg;
{
struct nge_softc *sc;
struct ifnet *ifp;
u_int32_t status;
sc = arg;
ifp = &sc->arpcom.ac_if;
/* Supress unwanted interrupts */
if (!(ifp->if_flags & IFF_UP)) {
nge_stop(sc);
return;
}
/* Disable interrupts. */
CSR_WRITE_4(sc, NGE_IER, 0);
for (;;) {
/* Reading the ISR register clears all interrupts. */
status = CSR_READ_4(sc, NGE_ISR);
if ((status & NGE_INTRS) == 0)
break;
if ((status & NGE_ISR_TX_DESC_OK) ||
(status & NGE_ISR_TX_ERR) ||
(status & NGE_ISR_TX_OK) ||
(status & NGE_ISR_TX_IDLE))
nge_txeof(sc);
if ((status & NGE_ISR_RX_DESC_OK) ||
(status & NGE_ISR_RX_OK))
nge_rxeof(sc);
if ((status & NGE_ISR_RX_ERR) ||
(status & NGE_ISR_RX_OFLOW)) {
nge_rxeoc(sc);
}
if (status & NGE_ISR_SYSERR) {
nge_reset(sc);
ifp->if_flags &= ~IFF_RUNNING;
nge_init(sc);
}
if (status & NGE_IMR_PHY_INTR) {
sc->nge_link = 0;
nge_tick(sc);
}
}
/* Re-enable interrupts. */
CSR_WRITE_4(sc, NGE_IER, 1);
if (ifp->if_snd.ifq_head != NULL)
nge_start(ifp);
return;
}
/*
* Encapsulate an mbuf chain in a descriptor by coupling the mbuf data
* pointers to the fragment pointers.
*/
static int nge_encap(sc, m_head, txidx)
struct nge_softc *sc;
struct mbuf *m_head;
u_int32_t *txidx;
{
struct nge_desc *f = NULL;
struct mbuf *m;
int frag, cur, cnt = 0;
#if NVLAN > 0
struct ifvlan *ifv = NULL;
if ((m_head->m_flags & (M_PROTO1|M_PKTHDR)) == (M_PROTO1|M_PKTHDR) &&
m_head->m_pkthdr.rcvif != NULL &&
m_head->m_pkthdr.rcvif->if_type == IFT_8021_VLAN)
ifv = m_head->m_pkthdr.rcvif->if_softc;
#endif
/*
* Start packing the mbufs in this chain into
* the fragment pointers. Stop when we run out
* of fragments or hit the end of the mbuf chain.
*/
m = m_head;
cur = frag = *txidx;
for (m = m_head; m != NULL; m = m->m_next) {
if (m->m_len != 0) {
if ((NGE_TX_LIST_CNT -
(sc->nge_cdata.nge_tx_cnt + cnt)) < 2)
return(ENOBUFS);
f = &sc->nge_ldata->nge_tx_list[frag];
f->nge_ctl = NGE_CMDSTS_MORE | m->m_len;
f->nge_ptr = vtophys(mtod(m, vm_offset_t));
if (cnt != 0)
f->nge_ctl |= NGE_CMDSTS_OWN;
cur = frag;
NGE_INC(frag, NGE_TX_LIST_CNT);
cnt++;
}
}
if (m != NULL)
return(ENOBUFS);
sc->nge_ldata->nge_tx_list[*txidx].nge_extsts = 0;
if (m_head->m_pkthdr.csum_flags) {
if (m_head->m_pkthdr.csum_flags & CSUM_IP)
sc->nge_ldata->nge_tx_list[*txidx].nge_extsts |=
NGE_TXEXTSTS_IPCSUM;
if (m_head->m_pkthdr.csum_flags & CSUM_TCP)
sc->nge_ldata->nge_tx_list[*txidx].nge_extsts |=
NGE_TXEXTSTS_TCPCSUM;
if (m_head->m_pkthdr.csum_flags & CSUM_UDP)
sc->nge_ldata->nge_tx_list[*txidx].nge_extsts |=
NGE_TXEXTSTS_UDPCSUM;
}
#if NVLAN > 0
if (ifv != NULL) {
sc->nge_ldata->nge_tx_list[cur].nge_extsts |=
(NGE_TXEXTSTS_VLANPKT|ifv->ifv_tag);
}
#endif
sc->nge_ldata->nge_tx_list[cur].nge_mbuf = m_head;
sc->nge_ldata->nge_tx_list[cur].nge_ctl &= ~NGE_CMDSTS_MORE;
sc->nge_ldata->nge_tx_list[*txidx].nge_ctl |= NGE_CMDSTS_OWN;
sc->nge_cdata.nge_tx_cnt += cnt;
*txidx = frag;
return(0);
}
/*
* Main transmit routine. To avoid having to do mbuf copies, we put pointers
* to the mbuf data regions directly in the transmit lists. We also save a
* copy of the pointers since the transmit list fragment pointers are
* physical addresses.
*/
static void nge_start(ifp)
struct ifnet *ifp;
{
struct nge_softc *sc;
struct mbuf *m_head = NULL;
u_int32_t idx;
sc = ifp->if_softc;
if (!sc->nge_link)
return;
idx = sc->nge_cdata.nge_tx_prod;
if (ifp->if_flags & IFF_OACTIVE)
return;
while(sc->nge_ldata->nge_tx_list[idx].nge_mbuf == NULL) {
IF_DEQUEUE(&ifp->if_snd, m_head);
if (m_head == NULL)
break;
if (nge_encap(sc, m_head, &idx)) {
IF_PREPEND(&ifp->if_snd, m_head);
ifp->if_flags |= IFF_OACTIVE;
break;
}
/*
* If there's a BPF listener, bounce a copy of this frame
* to him.
*/
if (ifp->if_bpf)
bpf_mtap(ifp, m_head);
}
/* Transmit */
sc->nge_cdata.nge_tx_prod = idx;
NGE_SETBIT(sc, NGE_CSR, NGE_CSR_TX_ENABLE);
/*
* Set a timeout in case the chip goes out to lunch.
*/
ifp->if_timer = 5;
return;
}
static void nge_init(xsc)
void *xsc;
{
struct nge_softc *sc = xsc;
struct ifnet *ifp = &sc->arpcom.ac_if;
struct mii_data *mii;
int s;
if (ifp->if_flags & IFF_RUNNING)
return;
s = splimp();
/*
* Cancel pending I/O and free all RX/TX buffers.
*/
nge_stop(sc);
mii = device_get_softc(sc->nge_miibus);
/* Set MAC address */
CSR_WRITE_4(sc, NGE_RXFILT_CTL, NGE_FILTADDR_PAR0);
CSR_WRITE_4(sc, NGE_RXFILT_DATA,
((u_int16_t *)sc->arpcom.ac_enaddr)[0]);
CSR_WRITE_4(sc, NGE_RXFILT_CTL, NGE_FILTADDR_PAR1);
CSR_WRITE_4(sc, NGE_RXFILT_DATA,
((u_int16_t *)sc->arpcom.ac_enaddr)[1]);
CSR_WRITE_4(sc, NGE_RXFILT_CTL, NGE_FILTADDR_PAR2);
CSR_WRITE_4(sc, NGE_RXFILT_DATA,
((u_int16_t *)sc->arpcom.ac_enaddr)[2]);
/* Init circular RX list. */
if (nge_list_rx_init(sc) == ENOBUFS) {
printf("nge%d: initialization failed: no "
"memory for rx buffers\n", sc->nge_unit);
nge_stop(sc);
(void)splx(s);
return;
}
/*
* Init tx descriptors.
*/
nge_list_tx_init(sc);
/*
* For the NatSemi chip, we have to explicitly enable the
* reception of ARP frames, as well as turn on the 'perfect
* match' filter where we store the station address, otherwise
* we won't receive unicasts meant for this host.
*/
NGE_SETBIT(sc, NGE_RXFILT_CTL, NGE_RXFILTCTL_ARP);
NGE_SETBIT(sc, NGE_RXFILT_CTL, NGE_RXFILTCTL_PERFECT);
/* If we want promiscuous mode, set the allframes bit. */
if (ifp->if_flags & IFF_PROMISC) {
NGE_SETBIT(sc, NGE_RXFILT_CTL, NGE_RXFILTCTL_ALLPHYS);
} else {
NGE_CLRBIT(sc, NGE_RXFILT_CTL, NGE_RXFILTCTL_ALLPHYS);
}
/*
* Set the capture broadcast bit to capture broadcast frames.
*/
if (ifp->if_flags & IFF_BROADCAST) {
NGE_SETBIT(sc, NGE_RXFILT_CTL, NGE_RXFILTCTL_BROAD);
} else {
NGE_CLRBIT(sc, NGE_RXFILT_CTL, NGE_RXFILTCTL_BROAD);
}
/*
* Load the multicast filter.
*/
nge_setmulti(sc);
/* Turn the receive filter on */
NGE_SETBIT(sc, NGE_RXFILT_CTL, NGE_RXFILTCTL_ENABLE);
/*
* Load the address of the RX and TX lists.
*/
CSR_WRITE_4(sc, NGE_RX_LISTPTR,
vtophys(&sc->nge_ldata->nge_rx_list[0]));
CSR_WRITE_4(sc, NGE_TX_LISTPTR,
vtophys(&sc->nge_ldata->nge_tx_list[0]));
/* Set RX configuration */
CSR_WRITE_4(sc, NGE_RX_CFG, NGE_RXCFG);
/*
* Enable hardware checksum validation for all IPv4
* packets, do not reject packets with bad checksums.
*/
CSR_WRITE_4(sc, NGE_VLAN_IP_RXCTL, NGE_VIPRXCTL_IPCSUM_ENB);
#if NVLAN > 0
/*
* If VLAN support is enabled, tell the chip to detect
* and strip VLAN tag info from received frames. The tag
* will be provided in the extsts field in the RX descriptors.
*/
NGE_SETBIT(sc, NGE_VLAN_IP_RXCTL,
NGE_VIPRXCTL_TAG_DETECT_ENB|NGE_VIPRXCTL_TAG_STRIP_ENB);
#endif
/* Set TX configuration */
CSR_WRITE_4(sc, NGE_TX_CFG, NGE_TXCFG);
/*
* Enable TX IPv4 checksumming on a per-packet basis.
*/
CSR_WRITE_4(sc, NGE_VLAN_IP_TXCTL, NGE_VIPTXCTL_CSUM_PER_PKT);
#if NVLAN > 0
/*
* If VLAN support is enabled, tell the chip to insert
* VLAN tags on a per-packet basis as dictated by the
* code in the frame encapsulation routine.
*/
NGE_SETBIT(sc, NGE_VLAN_IP_TXCTL, NGE_VIPTXCTL_TAG_PER_PKT);
#endif
/* Set full/half duplex mode. */
if ((mii->mii_media_active & IFM_GMASK) == IFM_FDX) {
NGE_SETBIT(sc, NGE_TX_CFG,
(NGE_TXCFG_IGN_HBEAT|NGE_TXCFG_IGN_CARR));
NGE_SETBIT(sc, NGE_RX_CFG, NGE_RXCFG_RX_FDX);
} else {
NGE_CLRBIT(sc, NGE_TX_CFG,
(NGE_TXCFG_IGN_HBEAT|NGE_TXCFG_IGN_CARR));
NGE_CLRBIT(sc, NGE_RX_CFG, NGE_RXCFG_RX_FDX);
}
/*
* Enable the delivery of PHY interrupts based on
* link/speed/duplex status changes. Also enable the
* extsts field in the DMA descriptors (needed for
* TCP/IP checksum offload on transmit).
*/
NGE_SETBIT(sc, NGE_CFG, NGE_CFG_PHYINTR_SPD|NGE_CFG_MODE_1000|
NGE_CFG_PHYINTR_LNK|NGE_CFG_PHYINTR_DUP|NGE_CFG_EXTSTS_ENB);
/*
* Enable interrupts.
*/
CSR_WRITE_4(sc, NGE_IMR, NGE_INTRS);
CSR_WRITE_4(sc, NGE_IER, 1);
/* Enable receiver and transmitter. */
NGE_CLRBIT(sc, NGE_CSR, NGE_CSR_TX_DISABLE|NGE_CSR_RX_DISABLE);
NGE_SETBIT(sc, NGE_CSR, NGE_CSR_RX_ENABLE);
nge_ifmedia_upd(ifp);
ifp->if_flags |= IFF_RUNNING;
ifp->if_flags &= ~IFF_OACTIVE;
(void)splx(s);
return;
}
/*
* Set media options.
*/
static int nge_ifmedia_upd(ifp)
struct ifnet *ifp;
{
struct nge_softc *sc;
struct mii_data *mii;
sc = ifp->if_softc;
mii = device_get_softc(sc->nge_miibus);
sc->nge_link = 0;
if (mii->mii_instance) {
struct mii_softc *miisc;
for (miisc = LIST_FIRST(&mii->mii_phys); miisc != NULL;
miisc = LIST_NEXT(miisc, mii_list))
mii_phy_reset(miisc);
}
mii_mediachg(mii);
return(0);
}
/*
* Report current media status.
*/
static void nge_ifmedia_sts(ifp, ifmr)
struct ifnet *ifp;
struct ifmediareq *ifmr;
{
struct nge_softc *sc;
struct mii_data *mii;
sc = ifp->if_softc;
mii = device_get_softc(sc->nge_miibus);
mii_pollstat(mii);
ifmr->ifm_active = mii->mii_media_active;
ifmr->ifm_status = mii->mii_media_status;
return;
}
static int nge_ioctl(ifp, command, data)
struct ifnet *ifp;
u_long command;
caddr_t data;
{
struct nge_softc *sc = ifp->if_softc;
struct ifreq *ifr = (struct ifreq *) data;
struct mii_data *mii;
int s, error = 0;
s = splimp();
switch(command) {
case SIOCSIFADDR:
case SIOCGIFADDR:
error = ether_ioctl(ifp, command, data);
break;
case SIOCSIFMTU:
if (ifr->ifr_mtu > NGE_JUMBO_MTU)
error = EINVAL;
else {
ifp->if_mtu = ifr->ifr_mtu;
/*
* Workaround: if the MTU is larger than
* 8152 (TX FIFO size minus 64 minus 18), turn off
* TX checksum offloading.
*/
if (ifr->ifr_mtu == 8152)
ifp->if_hwassist = 0;
else
ifp->if_hwassist = NGE_CSUM_FEATURES;
}
break;
case SIOCSIFFLAGS:
if (ifp->if_flags & IFF_UP) {
if (ifp->if_flags & IFF_RUNNING &&
ifp->if_flags & IFF_PROMISC &&
!(sc->nge_if_flags & IFF_PROMISC)) {
NGE_SETBIT(sc, NGE_RXFILT_CTL,
NGE_RXFILTCTL_ALLPHYS|
NGE_RXFILTCTL_ALLMULTI);
} else if (ifp->if_flags & IFF_RUNNING &&
!(ifp->if_flags & IFF_PROMISC) &&
sc->nge_if_flags & IFF_PROMISC) {
NGE_CLRBIT(sc, NGE_RXFILT_CTL,
NGE_RXFILTCTL_ALLPHYS);
if (!(ifp->if_flags & IFF_ALLMULTI))
NGE_CLRBIT(sc, NGE_RXFILT_CTL,
NGE_RXFILTCTL_ALLMULTI);
} else {
ifp->if_flags &= ~IFF_RUNNING;
nge_init(sc);
}
} else {
if (ifp->if_flags & IFF_RUNNING)
nge_stop(sc);
}
sc->nge_if_flags = ifp->if_flags;
error = 0;
break;
case SIOCADDMULTI:
case SIOCDELMULTI:
nge_setmulti(sc);
error = 0;
break;
case SIOCGIFMEDIA:
case SIOCSIFMEDIA:
mii = device_get_softc(sc->nge_miibus);
error = ifmedia_ioctl(ifp, ifr, &mii->mii_media, command);
break;
default:
error = EINVAL;
break;
}
(void)splx(s);
return(error);
}
static void nge_watchdog(ifp)
struct ifnet *ifp;
{
struct nge_softc *sc;
sc = ifp->if_softc;
ifp->if_oerrors++;
printf("nge%d: watchdog timeout\n", sc->nge_unit);
nge_stop(sc);
nge_reset(sc);
ifp->if_flags &= ~IFF_RUNNING;
nge_init(sc);
if (ifp->if_snd.ifq_head != NULL)
nge_start(ifp);
return;
}
/*
* Stop the adapter and free any mbufs allocated to the
* RX and TX lists.
*/
static void nge_stop(sc)
struct nge_softc *sc;
{
register int i;
struct ifnet *ifp;
struct ifmedia_entry *ifm;
struct mii_data *mii;
int mtmp, itmp;
ifp = &sc->arpcom.ac_if;
ifp->if_timer = 0;
mii = device_get_softc(sc->nge_miibus);
untimeout(nge_tick, sc, sc->nge_stat_ch);
CSR_WRITE_4(sc, NGE_IER, 0);
CSR_WRITE_4(sc, NGE_IMR, 0);
NGE_SETBIT(sc, NGE_CSR, NGE_CSR_TX_DISABLE|NGE_CSR_RX_DISABLE);
DELAY(1000);
CSR_WRITE_4(sc, NGE_TX_LISTPTR, 0);
CSR_WRITE_4(sc, NGE_RX_LISTPTR, 0);
/*
* Isolate/power down the PHY, but leave the media selection
* unchanged so that things will be put back to normal when
* we bring the interface back up.
*/
itmp = ifp->if_flags;
ifp->if_flags |= IFF_UP;
ifm = mii->mii_media.ifm_cur;
mtmp = ifm->ifm_media;
ifm->ifm_media = IFM_ETHER|IFM_NONE;
mii_mediachg(mii);
ifm->ifm_media = mtmp;
ifp->if_flags = itmp;
sc->nge_link = 0;
/*
* Free data in the RX lists.
*/
for (i = 0; i < NGE_RX_LIST_CNT; i++) {
if (sc->nge_ldata->nge_rx_list[i].nge_mbuf != NULL) {
m_freem(sc->nge_ldata->nge_rx_list[i].nge_mbuf);
sc->nge_ldata->nge_rx_list[i].nge_mbuf = NULL;
}
}
bzero((char *)&sc->nge_ldata->nge_rx_list,
sizeof(sc->nge_ldata->nge_rx_list));
/*
* Free the TX list buffers.
*/
for (i = 0; i < NGE_TX_LIST_CNT; i++) {
if (sc->nge_ldata->nge_tx_list[i].nge_mbuf != NULL) {
m_freem(sc->nge_ldata->nge_tx_list[i].nge_mbuf);
sc->nge_ldata->nge_tx_list[i].nge_mbuf = NULL;
}
}
bzero((char *)&sc->nge_ldata->nge_tx_list,
sizeof(sc->nge_ldata->nge_tx_list));
ifp->if_flags &= ~(IFF_RUNNING | IFF_OACTIVE);
return;
}
/*
* Stop all chip I/O so that the kernel's probe routines don't
* get confused by errant DMAs when rebooting.
*/
static void nge_shutdown(dev)
device_t dev;
{
struct nge_softc *sc;
sc = device_get_softc(dev);
nge_reset(sc);
nge_stop(sc);
return;
}
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