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freebsd-nq/sys/dev/ex/if_ex.c
Peter Wemm c3aac50f28 $Id$ -> $FreeBSD$
1999-08-28 01:08:13 +00:00

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/*
* Copyright (c) 1996, Javier Martín Rueda (jmrueda@diatel.upm.es)
* 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 unmodified, 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.
*
* 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.
*
* $FreeBSD$
*/
/*
* Intel EtherExpress Pro/10, Pro/10+ Ethernet driver
*
* Revision history:
*
* 30-Oct-1996: first beta version. Inet and BPF supported, but no multicast.
*/
#include "ex.h"
#if NEX > 0
#include "bpf.h"
#include "opt_inet.h"
#include "opt_ipx.h"
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/conf.h>
#include <sys/sockio.h>
#include <sys/mbuf.h>
#include <sys/socket.h>
#include <net/ethernet.h>
#include <net/if.h>
#include <netinet/in.h>
#include <netinet/if_ether.h>
#if NBPF > 0
#include <net/bpf.h>
#endif
#include <machine/clock.h>
#include <i386/isa/isa_device.h>
#include <i386/isa/if_exreg.h>
#ifdef EXDEBUG
#define Start_End 1
#define Rcvd_Pkts 2
#define Sent_Pkts 4
#define Status 8
static int debug_mask = 0;
static int exintr_count = 0;
#define DODEBUG(level, action) if (level & debug_mask) action
#else
#define DODEBUG(level, action)
#endif
#define Conn_BNC 1
#define Conn_TPE 2
#define Conn_AUI 3
struct ex_softc {
struct arpcom arpcom; /* Ethernet common data */
u_int iobase; /* I/O base address. */
u_short connector; /* Connector type. */
u_short irq_no; /* IRQ number. */
char *irq2ee; /* irq <-> internal representation conversion */
u_char *ee2irq;
u_int mem_size; /* Total memory size, in bytes. */
u_int rx_mem_size; /* Rx memory size (by default, first 3/4 of total memory). */
u_int rx_lower_limit, rx_upper_limit; /* Lower and upper limits of receive buffer. */
u_int rx_head; /* Head of receive ring buffer. */
u_int tx_mem_size; /* Tx memory size (by default, last quarter of total memory). */
u_int tx_lower_limit, tx_upper_limit; /* Lower and upper limits of transmit buffer. */
u_int tx_head, tx_tail; /* Head and tail of transmit ring buffer. */
u_int tx_last; /* Pointer to beginning of last frame in the chain. */
};
static struct ex_softc ex_sc[NEX]; /* XXX would it be better to malloc(3) the memory? */
static char irq2eemap[] = { -1, -1, 0, 1, -1, 2, -1, -1, -1, 0, 3, 4, -1, -1, -1, -1 };
static u_char ee2irqmap[] = { 9, 3, 5, 10, 11, 0, 0, 0 };
static char plus_irq2eemap[] = { -1, -1, -1, 0, 1, 2, -1, 3, -1, 4, 5, 6, 7, -1, -1, -1 };
static u_char plus_ee2irqmap[] = { 3, 4, 5, 7, 9, 10, 11, 12 };
static int ex_probe __P((struct isa_device *));
static int ex_attach __P((struct isa_device *));
static void ex_init __P((void *));
static void ex_start __P((struct ifnet *));
static void ex_stop __P((int));
static ointhand2_t exintr;
static int ex_ioctl __P((struct ifnet *, u_long, caddr_t));
static void ex_reset __P((int));
static void ex_watchdog __P((struct ifnet *));
static u_short eeprom_read __P((int, int));
static int look_for_card __P((u_int));
static void ex_tx_intr __P((int));
static void ex_rx_intr __P((int));
struct isa_driver exdriver = {
ex_probe,
ex_attach,
"ex",
0
};
static int look_for_card(u_int iobase)
{
int count1, count2;
/*
* Check for the i82595 signature, and check that the round robin
* counter actually advances.
*/
if (((count1 = inb(iobase + ID_REG)) & Id_Mask) != Id_Sig)
return(0);
count2 = inb(iobase + ID_REG);
count2 = inb(iobase + ID_REG);
count2 = inb(iobase + ID_REG);
return((count2 & Counter_bits) == ((count1 + 0xc0) & Counter_bits));
}
int ex_probe(struct isa_device *dev)
{
int unit = dev->id_unit;
struct ex_softc *sc = &ex_sc[unit];
u_int iobase;
u_short eaddr_tmp;
int tmp;
DODEBUG(Start_End, printf("ex_probe%d: start\n", unit););
/*
* If an I/O address was supplied in the configuration file, probe only
* that. Otherwise, cycle through the predefined set of possible addresses.
*/
if (dev->id_iobase != -1) {
if (! look_for_card(iobase = dev->id_iobase))
return(0);
}
else {
for (iobase = 0x200; iobase < 0x3a0; iobase += 0x10)
if (look_for_card(iobase))
break;
if (iobase >= 0x3a0)
return(0);
else
dev->id_iobase = iobase;
}
/*
* Reset the card.
*/
outb(iobase + CMD_REG, Reset_CMD);
DELAY(400);
/*
* Fill in several fields of the softc structure:
* - I/O base address.
* - Hardware Ethernet address.
* - IRQ number (if not supplied in config file, read it from EEPROM).
* - Connector type.
*/
sc->iobase = iobase;
eaddr_tmp = eeprom_read(iobase, EE_Eth_Addr_Lo);
sc->arpcom.ac_enaddr[5] = eaddr_tmp & 0xff;
sc->arpcom.ac_enaddr[4] = eaddr_tmp >> 8;
eaddr_tmp = eeprom_read(iobase, EE_Eth_Addr_Mid);
sc->arpcom.ac_enaddr[3] = eaddr_tmp & 0xff;
sc->arpcom.ac_enaddr[2] = eaddr_tmp >> 8;
eaddr_tmp = eeprom_read(iobase, EE_Eth_Addr_Hi);
sc->arpcom.ac_enaddr[1] = eaddr_tmp & 0xff;
sc->arpcom.ac_enaddr[0] = eaddr_tmp >> 8;
tmp = eeprom_read(iobase, EE_IRQ_No) & IRQ_No_Mask;
/* work out which set of irq <-> internal tables to use */
if (sc->arpcom.ac_enaddr[0] == 0x00 &&
sc->arpcom.ac_enaddr[1] == 0xA0 &&
sc->arpcom.ac_enaddr[2] == 0xC9) { /* it's a 10+ */
sc->irq2ee = plus_irq2eemap;
sc->ee2irq = plus_ee2irqmap;
} else { /* it's an ordinary 10 */
sc->irq2ee = irq2eemap;
sc->ee2irq = ee2irqmap;
}
if (dev->id_irq > 0) {
if (sc->ee2irq[tmp] != ffs(dev->id_irq) - 1)
printf("ex%d: WARNING: board's EEPROM is configured for IRQ %d, using %d\n", unit, sc->ee2irq[tmp], ffs(dev->id_irq) - 1);
sc->irq_no = ffs(dev->id_irq) - 1;
}
else {
sc->irq_no = sc->ee2irq[tmp];
dev->id_irq = 1 << sc->irq_no;
}
if (sc->irq_no == 0) {
printf("ex%d: invalid IRQ.\n", unit);
return(0);
}
outb(iobase + CMD_REG, Bank2_Sel);
tmp = inb(iobase + REG3);
if (tmp & TPE_bit)
sc->connector = Conn_TPE;
else if (tmp & BNC_bit)
sc->connector = Conn_BNC;
else
sc->connector = Conn_AUI;
sc->mem_size = CARD_RAM_SIZE; /* XXX This should be read from the card itself. */
outb(iobase + CMD_REG, Bank0_Sel);
DODEBUG(Start_End, printf("ex_probe%d: finish\n", unit););
return(EX_IOSIZE);
}
int ex_attach(struct isa_device *dev)
{
int unit = dev->id_unit;
struct ex_softc *sc = &ex_sc[unit];
struct ifnet *ifp = &sc->arpcom.ac_if;
DODEBUG(Start_End, printf("ex_attach%d: start\n", unit););
dev->id_ointr = exintr;
/*
* Initialize the ifnet structure.
*/
ifp->if_softc = sc;
ifp->if_unit = unit;
ifp->if_name = "ex";
ifp->if_init = ex_init;
ifp->if_output = ether_output;
ifp->if_start = ex_start;
ifp->if_ioctl = ex_ioctl;
ifp->if_watchdog = ex_watchdog;
ifp->if_mtu = ETHERMTU;
ifp->if_flags = IFF_SIMPLEX | IFF_BROADCAST /* XXX not done yet. | IFF_MULTICAST */;
/*
* Attach the interface.
*/
if_attach(ifp);
ether_ifattach(ifp);
if (sc->arpcom.ac_enaddr[0] == 0x00 &&
sc->arpcom.ac_enaddr[1] == 0xA0 &&
sc->arpcom.ac_enaddr[2] == 0xC9) {
printf("ex%d: Intel EtherExpress Pro/10+, address %6D, connector ", dev->id_unit, sc->arpcom.ac_enaddr, ":");
} else {
printf("ex%d: Intel EtherExpress Pro/10, address %6D, connector ", dev->id_unit, sc->arpcom.ac_enaddr, ":");
}
switch(sc->connector) {
case Conn_TPE: printf("TPE\n"); break;
case Conn_BNC: printf("BNC\n"); break;
case Conn_AUI: printf("AUI\n"); break;
default: printf("???\n");
}
/*
* If BPF is in the kernel, call the attach for it
*/
#if NBPF > 0
bpfattach(ifp, DLT_EN10MB, sizeof(struct ether_header));
#endif
DODEBUG(Start_End, printf("ex_attach%d: finish\n", unit););
sc->arpcom.ac_if.if_snd.ifq_maxlen = ifqmaxlen;
return(1);
}
void ex_init(void *xsc)
{
register struct ex_softc *sc = (struct ex_softc *) xsc;
struct ifnet *ifp = &sc->arpcom.ac_if;
int s, i;
register int iobase = sc->iobase;
unsigned short temp_reg;
DODEBUG(Start_End, printf("ex_init%d: start\n", ifp->if_unit););
if (ifp->if_addrhead.tqh_first == NULL)
return;
s = splimp();
sc->arpcom.ac_if.if_timer = 0;
/*
* Load the ethernet address into the card.
*/
outb(iobase + CMD_REG, Bank2_Sel);
temp_reg = inb(iobase + EEPROM_REG);
if (temp_reg & Trnoff_Enable)
outb(iobase + EEPROM_REG, temp_reg & ~Trnoff_Enable);
for (i = 0; i < ETHER_ADDR_LEN; i++)
outb(iobase + I_ADDR_REG0 + i, sc->arpcom.ac_enaddr[i]);
/*
* - Setup transmit chaining and discard bad received frames.
* - Match broadcast.
* - Clear test mode.
* - Set receiving mode.
* - Set IRQ number.
*/
outb(iobase + REG1, inb(iobase + REG1) | Tx_Chn_Int_Md | Tx_Chn_ErStp | Disc_Bad_Fr);
outb(iobase + REG2, inb(iobase + REG2) | No_SA_Ins | RX_CRC_InMem);
outb(iobase + REG3, inb(iobase + REG3) & 0x3f /* XXX constants. */ );
outb(iobase + CMD_REG, Bank1_Sel);
outb(iobase + INT_NO_REG, (inb(iobase + INT_NO_REG) & 0xf8) | sc->irq2ee[sc->irq_no]);
/*
* Divide the available memory in the card into rcv and xmt buffers.
* By default, I use the first 3/4 of the memory for the rcv buffer,
* and the remaining 1/4 of the memory for the xmt buffer.
*/
sc->rx_mem_size = sc->mem_size * 3 / 4;
sc->tx_mem_size = sc->mem_size - sc->rx_mem_size;
sc->rx_lower_limit = 0x0000;
sc->rx_upper_limit = sc->rx_mem_size - 2;
sc->tx_lower_limit = sc->rx_mem_size;
sc->tx_upper_limit = sc->mem_size - 2;
outb(iobase + RCV_LOWER_LIMIT_REG, sc->rx_lower_limit >> 8);
outb(iobase + RCV_UPPER_LIMIT_REG, sc->rx_upper_limit >> 8);
outb(iobase + XMT_LOWER_LIMIT_REG, sc->tx_lower_limit >> 8);
outb(iobase + XMT_UPPER_LIMIT_REG, sc->tx_upper_limit >> 8);
/*
* Enable receive and transmit interrupts, and clear any pending int.
*/
outb(iobase + REG1, inb(iobase + REG1) | TriST_INT);
outb(iobase + CMD_REG, Bank0_Sel);
outb(iobase + MASK_REG, All_Int & ~(Rx_Int | Tx_Int));
outb(iobase + STATUS_REG, All_Int);
/*
* Initialize receive and transmit ring buffers.
*/
outw(iobase + RCV_BAR, sc->rx_lower_limit);
sc->rx_head = sc->rx_lower_limit;
outw(iobase + RCV_STOP_REG, sc->rx_upper_limit | 0xfe);
outw(iobase + XMT_BAR, sc->tx_lower_limit);
sc->tx_head = sc->tx_tail = sc->tx_lower_limit;
ifp->if_flags |= IFF_RUNNING;
ifp->if_flags &= ~IFF_OACTIVE;
DODEBUG(Status, printf("OIDLE init\n"););
/*
* Final reset of the board, and enable operation.
*/
outb(iobase + CMD_REG, Sel_Reset_CMD);
DELAY(2);
outb(iobase + CMD_REG, Rcv_Enable_CMD);
ex_start(ifp);
splx(s);
DODEBUG(Start_End, printf("ex_init%d: finish\n", ifp->if_unit););
}
void ex_start(struct ifnet *ifp)
{
int unit = ifp->if_unit;
register struct ex_softc *sc = &ex_sc[unit];
register int iobase = sc->iobase;
int i, s, len, data_len, avail, dest, next;
unsigned char tmp16[2];
struct mbuf *opkt;
register struct mbuf *m;
DODEBUG(Start_End, printf("ex_start%d: start\n", unit););
s = splimp();
/*
* Main loop: send outgoing packets to network card until there are no
* more packets left, or the card cannot accept any more yet.
*/
while (((opkt = ifp->if_snd.ifq_head) != NULL) && ! (ifp->if_flags & IFF_OACTIVE)) {
/*
* Ensure there is enough free transmit buffer space for this packet,
* including its header. Note: the header cannot wrap around the end of
* the transmit buffer and must be kept together, so we allow space for
* twice the length of the header, just in case.
*/
for (len = 0, m = opkt; m != NULL; m = m->m_next)
len += m->m_len;
data_len = len;
DODEBUG(Sent_Pkts, printf("1. Sending packet with %d data bytes. ", data_len););
if (len & 1)
len += XMT_HEADER_LEN + 1;
else
len += XMT_HEADER_LEN;
if ((i = sc->tx_tail - sc->tx_head) >= 0)
avail = sc->tx_mem_size - i;
else
avail = -i;
DODEBUG(Sent_Pkts, printf("i=%d, avail=%d\n", i, avail););
if (avail >= len + XMT_HEADER_LEN) {
IF_DEQUEUE(&ifp->if_snd, opkt);
#ifdef EX_PSA_INTR
/*
* Disable rx and tx interrupts, to avoid corruption of the host
* address register by interrupt service routines. XXX Is this necessary with splimp() enabled?
*/
outb(iobase + MASK_REG, All_Int);
#endif
/*
* Compute the start and end addresses of this frame in the tx buffer.
*/
dest = sc->tx_tail;
next = dest + len;
if (next > sc->tx_upper_limit) {
if ((sc->tx_upper_limit + 2 - sc->tx_tail) <= XMT_HEADER_LEN) {
dest = sc->tx_lower_limit;
next = dest + len;
}
else
next = sc->tx_lower_limit + next - sc->tx_upper_limit - 2;
}
/*
* Build the packet frame in the card's ring buffer.
*/
DODEBUG(Sent_Pkts, printf("2. dest=%d, next=%d. ", dest, next););
outw(iobase + HOST_ADDR_REG, dest);
outw(iobase + IO_PORT_REG, Transmit_CMD);
outw(iobase + IO_PORT_REG, 0);
outw(iobase + IO_PORT_REG, next);
outw(iobase + IO_PORT_REG, data_len);
/*
* Output the packet data to the card. Ensure all transfers are
* 16-bit wide, even if individual mbufs have odd length.
*/
for (m = opkt, i = 0; m != NULL; m = m->m_next) {
DODEBUG(Sent_Pkts, printf("[%d]", m->m_len););
if (i) {
tmp16[1] = *(mtod(m, caddr_t));
outsw(iobase + IO_PORT_REG, tmp16, 1);
}
outsw(iobase + IO_PORT_REG, mtod(m, caddr_t) + i, (m->m_len - i) / 2);
if ((i = (m->m_len - i) & 1) != 0)
tmp16[0] = *(mtod(m, caddr_t) + m->m_len - 1);
}
if (i)
outsw(iobase + IO_PORT_REG, tmp16, 1);
/*
* If there were other frames chained, update the chain in the last one.
*/
if (sc->tx_head != sc->tx_tail) {
if (sc->tx_tail != dest) {
outw(iobase + HOST_ADDR_REG, sc->tx_last + XMT_Chain_Point);
outw(iobase + IO_PORT_REG, dest);
}
outw(iobase + HOST_ADDR_REG, sc->tx_last + XMT_Byte_Count);
i = inw(iobase + IO_PORT_REG);
outw(iobase + HOST_ADDR_REG, sc->tx_last + XMT_Byte_Count);
outw(iobase + IO_PORT_REG, i | Ch_bit);
}
/*
* Resume normal operation of the card:
* - Make a dummy read to flush the DRAM write pipeline.
* - Enable receive and transmit interrupts.
* - Send Transmit or Resume_XMT command, as appropriate.
*/
inw(iobase + IO_PORT_REG);
#ifdef EX_PSA_INTR
outb(iobase + MASK_REG, All_Int & ~(Rx_Int | Tx_Int));
#endif
if (sc->tx_head == sc->tx_tail) {
outw(iobase + XMT_BAR, dest);
outb(iobase + CMD_REG, Transmit_CMD);
sc->tx_head = dest;
DODEBUG(Sent_Pkts, printf("Transmit\n"););
}
else {
outb(iobase + CMD_REG, Resume_XMT_List_CMD);
DODEBUG(Sent_Pkts, printf("Resume\n"););
}
sc->tx_last = dest;
sc->tx_tail = next;
#if NBPF > 0
if (ifp->if_bpf != NULL)
bpf_mtap(ifp, opkt);
#endif
ifp->if_timer = 2;
ifp->if_opackets++;
m_freem(opkt);
}
else {
ifp->if_flags |= IFF_OACTIVE;
DODEBUG(Status, printf("OACTIVE start\n"););
}
}
splx(s);
DODEBUG(Start_End, printf("ex_start%d: finish\n", unit););
}
void ex_stop(int unit)
{
struct ex_softc *sc = &ex_sc[unit];
int iobase = sc->iobase;
DODEBUG(Start_End, printf("ex_stop%d: start\n", unit););
/*
* Disable card operation:
* - Disable the interrupt line.
* - Flush transmission and disable reception.
* - Mask and clear all interrupts.
* - Reset the 82595.
*/
outb(iobase + CMD_REG, Bank1_Sel);
outb(iobase + REG1, inb(iobase + REG1) & ~TriST_INT);
outb(iobase + CMD_REG, Bank0_Sel);
outb(iobase + CMD_REG, Rcv_Stop);
sc->tx_head = sc->tx_tail = sc->tx_lower_limit;
sc->tx_last = 0; /* XXX I think these two lines are not necessary, because ex_init will always be called again to reinit the interface. */
outb(iobase + MASK_REG, All_Int);
outb(iobase + STATUS_REG, All_Int);
outb(iobase + CMD_REG, Reset_CMD);
DELAY(200);
DODEBUG(Start_End, printf("ex_stop%d: finish\n", unit););
}
static void exintr(int unit)
{
struct ex_softc *sc = &ex_sc[unit];
struct ifnet *ifp = &sc->arpcom.ac_if;
int iobase = sc->iobase;
int int_status, send_pkts;
DODEBUG(Start_End, printf("exintr%d: start\n", unit););
#ifdef EXDEBUG
if (++exintr_count != 1)
printf("WARNING: nested interrupt (%d). Mail the author.\n", exintr_count);
#endif
send_pkts = 0;
while ((int_status = inb(iobase + STATUS_REG)) & (Tx_Int | Rx_Int)) {
if (int_status & Rx_Int) {
outb(iobase + STATUS_REG, Rx_Int);
ex_rx_intr(unit);
}
else if (int_status & Tx_Int) {
outb(iobase + STATUS_REG, Tx_Int);
ex_tx_intr(unit);
send_pkts = 1;
}
}
/*
* If any packet has been transmitted, and there are queued packets to
* be sent, attempt to send more packets to the network card.
*/
if (send_pkts && (ifp->if_snd.ifq_head != NULL))
ex_start(ifp);
#ifdef EXDEBUG
exintr_count--;
#endif
DODEBUG(Start_End, printf("exintr%d: finish\n", unit););
}
void ex_tx_intr(int unit)
{
register struct ex_softc *sc = &ex_sc[unit];
register struct ifnet *ifp = &sc->arpcom.ac_if;
register int iobase = sc->iobase;
int tx_status;
DODEBUG(Start_End, printf("ex_tx_intr%d: start\n", unit););
/*
* - Cancel the watchdog.
* For all packets transmitted since last transmit interrupt:
* - Advance chain pointer to next queued packet.
* - Update statistics.
*/
ifp->if_timer = 0;
while (sc->tx_head != sc->tx_tail) {
outw(iobase + HOST_ADDR_REG, sc->tx_head);
if (! inw(iobase + IO_PORT_REG) & Done_bit)
break;
tx_status = inw(iobase + IO_PORT_REG);
sc->tx_head = inw(iobase + IO_PORT_REG);
if (tx_status & TX_OK_bit)
ifp->if_opackets++;
else
ifp->if_oerrors++;
ifp->if_collisions += tx_status & No_Collisions_bits;
}
/*
* The card should be ready to accept more packets now.
*/
ifp->if_flags &= ~IFF_OACTIVE;
DODEBUG(Status, printf("OIDLE tx_intr\n"););
DODEBUG(Start_End, printf("ex_tx_intr%d: finish\n", unit););
}
void ex_rx_intr(int unit)
{
register struct ex_softc *sc = &ex_sc[unit];
register struct ifnet *ifp = &sc->arpcom.ac_if;
register int iobase = sc->iobase;
int rx_status, pkt_len, QQQ;
register struct mbuf *m, *ipkt;
struct ether_header *eh;
DODEBUG(Start_End, printf("ex_rx_intr%d: start\n", unit););
/*
* For all packets received since last receive interrupt:
* - If packet ok, read it into a new mbuf and queue it to interface,
* updating statistics.
* - If packet bad, just discard it, and update statistics.
* Finally, advance receive stop limit in card's memory to new location.
*/
outw(iobase + HOST_ADDR_REG, sc->rx_head);
while (inw(iobase + IO_PORT_REG) == RCV_Done) {
rx_status = inw(iobase + IO_PORT_REG);
sc->rx_head = inw(iobase + IO_PORT_REG);
QQQ = pkt_len = inw(iobase + IO_PORT_REG);
if (rx_status & RCV_OK_bit) {
MGETHDR(m, M_DONTWAIT, MT_DATA);
ipkt = m;
if (ipkt == NULL)
ifp->if_iqdrops++;
else {
ipkt->m_pkthdr.rcvif = ifp;
ipkt->m_pkthdr.len = pkt_len;
ipkt->m_len = MHLEN;
while (pkt_len > 0) {
if (pkt_len > MINCLSIZE) {
MCLGET(m, M_DONTWAIT);
if (m->m_flags & M_EXT)
m->m_len = MCLBYTES;
else {
m_freem(ipkt);
ifp->if_iqdrops++;
goto rx_another;
}
}
m->m_len = min(m->m_len, pkt_len);
/*
* NOTE: I'm assuming that all mbufs allocated are of even length,
* except for the last one in an odd-length packet.
*/
insw(iobase + IO_PORT_REG, mtod(m, caddr_t), m->m_len / 2);
if (m->m_len & 1)
*(mtod(m, caddr_t) + m->m_len - 1) = inb(iobase + IO_PORT_REG);
pkt_len -= m->m_len;
if (pkt_len > 0) {
MGET(m->m_next, M_DONTWAIT, MT_DATA);
if (m->m_next == NULL) {
m_freem(ipkt);
ifp->if_iqdrops++;
goto rx_another;
}
m = m->m_next;
m->m_len = MLEN;
}
}
eh = mtod(ipkt, struct ether_header *);
#ifdef EXDEBUG
if (debug_mask & Rcvd_Pkts) {
if ((eh->ether_dhost[5] != 0xff) || (eh->ether_dhost[0] != 0xff)) {
printf("Receive packet with %d data bytes: %6D -> ", QQQ, eh->ether_shost, ":");
printf("%6D\n", eh->ether_dhost, ":");
} /* QQQ */
}
#endif
#if NBPF > 0
if (ifp->if_bpf != NULL) {
bpf_mtap(ifp, ipkt);
/*
* Note that the interface cannot be in promiscuous mode if there are
* no BPF listeners. And if we are in promiscuous mode, we have to
* check if this packet is really ours.
*/
if ((ifp->if_flags & IFF_PROMISC) &&
(eh->ether_dhost[0] & 1) == 0 &&
bcmp(eh->ether_dhost, sc->arpcom.ac_enaddr, sizeof(eh->ether_dhost)) != 0 &&
bcmp(eh->ether_dhost, etherbroadcastaddr, sizeof(eh->ether_dhost)) != 0) {
m_freem(ipkt);
goto rx_another;
}
}
#endif
m_adj(ipkt, sizeof(struct ether_header));
ether_input(ifp, eh, ipkt);
ifp->if_ipackets++;
}
}
else
ifp->if_ierrors++;
outw(iobase + HOST_ADDR_REG, sc->rx_head);
rx_another: ;
}
if (sc->rx_head < sc->rx_lower_limit + 2)
outw(iobase + RCV_STOP_REG, sc->rx_upper_limit);
else
outw(iobase + RCV_STOP_REG, sc->rx_head - 2);
DODEBUG(Start_End, printf("ex_rx_intr%d: finish\n", unit););
}
int ex_ioctl(register struct ifnet *ifp, u_long cmd, caddr_t data)
{
struct ex_softc *sc = &ex_sc[ifp->if_unit];
int s, error = 0;
DODEBUG(Start_End, printf("ex_ioctl%d: start ", ifp->if_unit););
s = splimp();
switch(cmd) {
case SIOCSIFADDR:
case SIOCGIFADDR:
case SIOCSIFMTU:
error = ether_ioctl(ifp, cmd, data);
break;
case SIOCSIFFLAGS:
DODEBUG(Start_End, printf("SIOCSIFFLAGS"););
if ((ifp->if_flags & IFF_UP) == 0 && ifp->if_flags & IFF_RUNNING) {
ifp->if_flags &= ~IFF_RUNNING;
ex_stop(ifp->if_unit);
}
else
ex_init(sc);
break;
#ifdef NODEF
case SIOCGHWADDR:
DODEBUG(Start_End, printf("SIOCGHWADDR"););
bcopy((caddr_t) sc->sc_addr, (caddr_t) &ifr->ifr_data, sizeof(sc->sc_addr));
break;
#endif
case SIOCADDMULTI:
DODEBUG(Start_End, printf("SIOCADDMULTI"););
case SIOCDELMULTI:
DODEBUG(Start_End, printf("SIOCDELMULTI"););
/* XXX Support not done yet. */
error = EINVAL;
break;
default:
DODEBUG(Start_End, printf("unknown"););
error = EINVAL;
}
splx(s);
DODEBUG(Start_End, printf("\nex_ioctl%d: finish\n", ifp->if_unit););
return(error);
}
void ex_reset(int unit)
{
struct ex_softc *sc = &ex_sc[unit];
int s;
DODEBUG(Start_End, printf("ex_reset%d: start\n", unit););
s = splimp();
ex_stop(unit);
ex_init(sc);
splx(s);
DODEBUG(Start_End, printf("ex_reset%d: finish\n", unit););
}
void ex_watchdog(struct ifnet *ifp)
{
DODEBUG(Start_End, printf("ex_watchdog%d: start\n", ifp->if_unit););
ifp->if_flags &= ~IFF_OACTIVE;
DODEBUG(Status, printf("OIDLE watchdog\n"););
ifp->if_oerrors++;
ex_reset(ifp->if_unit);
ex_start(ifp);
DODEBUG(Start_End, printf("ex_watchdog%d: finish\n", ifp->if_unit););
}
static u_short eeprom_read(int iobase, int location)
{
int i;
u_short data = 0;
int ee_addr;
int read_cmd = location | EE_READ_CMD;
short ctrl_val = EECS;
ee_addr = iobase + EEPROM_REG;
outb(iobase + CMD_REG, Bank2_Sel);
outb(ee_addr, EECS);
for (i = 8; i >= 0; i--) {
short outval = (read_cmd & (1 << i)) ? ctrl_val | EEDI : ctrl_val;
outb(ee_addr, outval);
outb(ee_addr, outval | EESK);
DELAY(3);
outb(ee_addr, outval);
DELAY(2);
}
outb(ee_addr, ctrl_val);
for (i = 16; i > 0; i--) {
outb(ee_addr, ctrl_val | EESK);
DELAY(3);
data = (data << 1) | ((inb(ee_addr) & EEDO) ? 1 : 0);
outb(ee_addr, ctrl_val);
DELAY(2);
}
ctrl_val &= ~EECS;
outb(ee_addr, ctrl_val | EESK);
DELAY(3);
outb(ee_addr, ctrl_val);
DELAY(2);
outb(iobase + CMD_REG, Bank0_Sel);
return(data);
}
#endif /* NEX > 0 */
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