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freebsd-skq/sys/dev/ep/if_ep.c
dg 60db1a16bc Protected entire epioctl routine with splimp(). In this case, it is better 
form to do this than it is relying on individual subroutines (the logic
in epioctl is itself very minimal). Ideally, unnecessary splimp()'s should
now be removed if they exist; I'll leave this for a later date (a complete
code review of the driver needs to be done). Fixes a bug I noticed that
would show up when ifconfig'ing the interface down.
1995-07-05 07:21:34 +00:00

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/*
* Copyright (c) 1994 Herb Peyerl <hpeyerl@novatel.ca>
* 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 Herb Peyerl.
* 4. The name of Herb Peyerl 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.
*
* if_ep.c,v 1.19 1995/01/24 20:53:45 davidg Exp
*/
/*
* Modified from the FreeBSD 1.1.5.1 version by:
* Andres Vega Garcia
* INRIA - Sophia Antipolis, France
* avega@sophia.inria.fr
*/
/*
* $Id: if_ep.c,v 1.28 1995/05/30 08:02:07 rgrimes Exp $
*
* Promiscuous mode added and interrupt logic slightly changed
* to reduce the number of adapter failures. Transceiver select
* logic changed to use value from EEPROM. Autoconfiguration
* features added.
* Done by:
* Serge Babkin
* Chelindbank (Chelyabinsk, Russia)
* babkin@hq.icb.chel.su
*/
#include "ep.h"
#if NEP > 0
#include "bpfilter.h"
#include <sys/param.h>
#if defined(__FreeBSD__)
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/devconf.h>
#endif
#include <sys/mbuf.h>
#include <sys/socket.h>
#include <sys/ioctl.h>
#include <sys/errno.h>
#include <sys/syslog.h>
#if defined(__NetBSD__)
#include <sys/select.h>
#endif
#include <net/if.h>
#include <net/if_dl.h>
#include <net/if_types.h>
#ifdef INET
#include <netinet/in.h>
#include <netinet/in_systm.h>
#include <netinet/in_var.h>
#include <netinet/ip.h>
#include <netinet/if_ether.h>
#endif
#ifdef NS
#include <netns/ns.h>
#include <netns/ns_if.h>
#endif
#if NBPFILTER > 0
#include <net/bpf.h>
#include <net/bpfdesc.h>
#endif
#if defined(__FreeBSD__)
#include <machine/clock.h>
#endif
#include <i386/isa/isa.h>
#include <i386/isa/isa_device.h>
#include <i386/isa/icu.h>
#include <i386/isa/if_epreg.h>
static int epprobe __P((struct isa_device *));
static int epattach __P((struct isa_device *));
static int epioctl __P((struct ifnet * ifp, int, caddr_t));
static void epmbuffill __P((caddr_t, int));
static void epmbufempty __P((struct ep_softc *));
void epinit __P((int));
void epintr __P((int));
void epread __P((struct ep_softc *));
void epreset __P((int));
void epstart __P((struct ifnet *));
void epstop __P((int));
void epwatchdog __P((int));
static int send_ID_sequence __P((int));
static int get_eeprom_data __P((int, int));
struct ep_softc ep_softc[NEP];
#define ep_ftst(f) (sc->stat&(f))
#define ep_fset(f) (sc->stat|=(f))
#define ep_frst(f) (sc->stat&=~(f))
struct isa_driver epdriver = {
epprobe,
epattach,
"ep",
0
};
static struct kern_devconf kdc_ep[NEP] = { {
0, 0, 0, /* filled in by dev_attach */
"ep", 0, { MDDT_ISA, 0, "net" },
isa_generic_externalize, 0, 0, ISA_EXTERNALLEN,
&kdc_isa0, /* parent */
0, /* parentdata */
DC_UNCONFIGURED, /* state */
"3Com 3C509 Ethernet adapter",
DC_CLS_NETIF /* class */
} };
static inline void
ep_registerdev(struct isa_device *id)
{
if(id->id_unit)
kdc_ep[id->id_unit] = kdc_ep[0];
kdc_ep[id->id_unit].kdc_unit = id->id_unit;
kdc_ep[id->id_unit].kdc_parentdata = id;
dev_attach(&kdc_ep[id->id_unit]);
}
int ep_current_tag = EP_LAST_TAG + 1;
struct {
int epb_addr; /* address of this board */
char epb_used; /* was this entry already used for configuring ? */
}
ep_board[EP_MAX_BOARDS + 1];
static int
eeprom_rdy(is)
struct isa_device *is;
{
int i;
for (i = 0; is_eeprom_busy(IS_BASE) && i < MAX_EEPROMBUSY; i++);
if (i >= MAX_EEPROMBUSY) {
printf("ep%d: eeprom failed to come ready.\n", is->id_unit);
return (0);
}
return (1);
}
static int
ep_look_for_board_at(is)
struct isa_device *is;
{
int data, i, j, io_base, id_port = EP_ID_PORT;
int nisa = 0, neisa = 0;
if (ep_current_tag == (EP_LAST_TAG + 1)) {
/* Come here just one time */
/* Look for the EISA boards, leave them activated */
for(j = 1; j < 16; j++) {
io_base = (j * EP_EISA_START) | EP_EISA_W0;
if (inw(io_base + EP_W0_MFG_ID) != MFG_ID)
continue;
/* we must found 0x1f if the board is EISA configurated */
if ((inw(io_base + EP_W0_ADDRESS_CFG) & 0x1f) != 0x1f)
continue;
/* Reset and Enable the card */
outb(io_base + EP_W0_CONFIG_CTRL, W0_P4_CMD_RESET_ADAPTER);
DELAY(1000); /* we must wait at least 1 ms */
outb(io_base + EP_W0_CONFIG_CTRL, W0_P4_CMD_ENABLE_ADAPTER);
/*
* Once activated, all the registers are mapped in the range
* x000 - x00F, where x is the slot number.
*/
ep_board[neisa].epb_used = 0;
ep_board[neisa++].epb_addr = j * EP_EISA_START;
}
ep_current_tag--;
/* Look for the ISA boards. Init and leave them actived */
outb(id_port, 0xc0); /* Global reset */
DELAY(10000);
for (i = 0; i < EP_MAX_BOARDS; i++) {
outb(id_port, 0);
outb(id_port, 0);
send_ID_sequence(id_port);
data = get_eeprom_data(id_port, EEPROM_MFG_ID);
if (data != MFG_ID)
break;
/* resolve contention using the Ethernet address */
for (j = 0; j < 3; j++)
data = get_eeprom_data(id_port, j);
ep_board[neisa+nisa].epb_used = 0;
ep_board[neisa+nisa++].epb_addr =
(get_eeprom_data(id_port, EEPROM_ADDR_CFG) & 0x1f) * 0x10 + 0x200;
outb(id_port, ep_current_tag); /* tags board */
outb(id_port, ACTIVATE_ADAPTER_TO_CONFIG);
ep_current_tag--;
}
ep_board[neisa+nisa].epb_addr = 0;
if (neisa) {
printf("%d 3C5x9 board(s) on EISA found at", neisa);
for (j = 0; ep_board[j].epb_addr; j++)
if (ep_board[j].epb_addr >= EP_EISA_START)
printf(" 0x%x", ep_board[j].epb_addr);
printf("\n");
}
if (nisa) {
printf("%d 3C5x9 board(s) on ISA found at", nisa);
for (j = 0; ep_board[j].epb_addr; j++)
if (ep_board[j].epb_addr < EP_EISA_START)
printf(" 0x%x", ep_board[j].epb_addr);
printf("\n");
}
}
/* we have two cases:
*
* 1. Device was configured with 'port ?'
* In this case we search for the first unused card in list
*
* 2. Device was configured with 'port xxx'
* In this case we search for the unused card with that address
*
*/
if(IS_BASE==-1) { /* port? */
for (i = 0; ep_board[i].epb_addr && ep_board[i].epb_used; i++);
if(ep_board[i].epb_addr==0)
return 0;
IS_BASE=ep_board[i].epb_addr;
ep_board[i].epb_used=1;
return 1;
} else {
for (i=0; ep_board[i].epb_addr && ep_board[i].epb_addr != IS_BASE; i++);
if( ep_board[i].epb_used || ep_board[i].epb_addr != IS_BASE)
return 0;
if (inw(IS_BASE + EP_W0_EEPROM_COMMAND) & EEPROM_TST_MODE)
printf("ep%d: 3c5x9 at 0x%x in test mode. Erase pencil mark!\n",
is->id_unit, IS_BASE);
ep_board[i].epb_used=1;
return 1;
}
}
/*
* get_e: gets a 16 bits word from the EEPROM. we must have set the window
* before
*/
static int
get_e(is, offset)
struct isa_device *is;
int offset;
{
if (!eeprom_rdy(is))
return (0xffff);
outw(IS_BASE + EP_W0_EEPROM_COMMAND, EEPROM_CMD_RD | offset);
if (!eeprom_rdy(is))
return (0xffff);
return (inw(IS_BASE + EP_W0_EEPROM_DATA));
}
int
epprobe(is)
struct isa_device *is;
{
struct ep_softc *sc = &ep_softc[is->id_unit];
u_short k;
int i;
ep_registerdev(is);
if (!ep_look_for_board_at(is))
return (0);
/*
* The iobase was found and MFG_ID was 0x6d50. PROD_ID should be
* 0x9[0-f]50
*/
GO_WINDOW(0);
k = get_e(is, EEPROM_PROD_ID);
if ((k & 0xf0ff) != (PROD_ID & 0xf0ff)) {
printf("epprobe: ignoring model %04x\n", k);
return (0);
}
k = get_e(is, EEPROM_RESOURCE_CFG);
k >>= 12;
/* Now we have two cases again:
*
* 1. Device was configured with 'irq?'
* In this case we use irq read from the board
*
* 2. Device was configured with 'irq xxx'
* In this case we set up the board to use specified interrupt
*
*/
if(is->id_irq==0) { /* irq? */
is->id_irq= 1 << ( (k==2) ? 9 : k );
}
if (BASE >= EP_EISA_START) /* we have an EISA board, we allow 32 bits access */
sc->stat = F_ACCESS_32_BITS;
else
sc->stat = 0;
/* By now, the adapter is already activated */
return (0x10); /* 16 bytes of I/O space used. */
}
static char *ep_conn_type[] = {"UTP", "AUI", "???", "BNC"};
static int
epattach(is)
struct isa_device *is;
{
struct ep_softc *sc = &ep_softc[is->id_unit];
struct ifnet *ifp = &sc->arpcom.ac_if;
u_short i, j, *p;
struct ifaddr *ifa;
struct sockaddr_dl *sdl;
int irq;
/* BASE = IS_BASE; */
sc->ep_io_addr = is->id_iobase;
printf("ep%d: ", is->id_unit);
sc->ep_connectors = 0;
i = inw(IS_BASE + EP_W0_CONFIG_CTRL);
j = inw(IS_BASE + EP_W0_ADDRESS_CFG) >> ACF_CONNECTOR_BITS;
if (i & IS_AUI) {
printf("aui");
sc->ep_connectors |= AUI;
}
if (i & IS_BNC) {
if (sc->ep_connectors)
printf("/");
printf("bnc");
sc->ep_connectors |= BNC;
}
if (i & IS_UTP) {
if (sc->ep_connectors)
printf("/");
printf("utp");
sc->ep_connectors |= UTP;
}
if (!(sc->ep_connectors & 7))
printf("no connectors!");
else
printf("[*%s*]", ep_conn_type[j]);
/*
* Read the station address from the eeprom
*/
p = (u_short *) & sc->arpcom.ac_enaddr;
for (i = 0; i < 3; i++) {
GO_WINDOW(0);
p[i] = htons(get_e(is, i));
GO_WINDOW(2);
outw(BASE + EP_W2_ADDR_0 + (i * 2), ntohs(p[i]));
}
printf(" address %s", ether_sprintf(sc->arpcom.ac_enaddr));
/*
* Write IRQ value to board
*/
i=is->id_irq;
if(i==0) {
printf(" irq STRANGE\n");
return 0;
}
for(irq=0; !(i & 1) && irq<16 ; i>>=1, irq++);
if(irq==9)
irq=2;
printf(" irq %d\n",irq);
GO_WINDOW(0);
outw(BASE + EP_W0_RESOURCE_CFG, SET_IRQ(irq));
ifp->if_unit = is->id_unit;
ifp->if_name = "ep";
ifp->if_mtu = ETHERMTU;
ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_NOTRAILERS;
ifp->if_init = epinit;
ifp->if_output = ether_output;
ifp->if_start = epstart;
ifp->if_ioctl = epioctl;
ifp->if_watchdog = epwatchdog;
ifp->if_timer=1;
if_attach(ifp);
kdc_ep[is->id_unit].kdc_state = DC_BUSY;
/*
* Fill the hardware address into ifa_addr if we find an AF_LINK entry.
* We need to do this so bpf's can get the hardware addr of this card.
* netstat likes this too!
*/
ifa = ifp->if_addrlist;
while ((ifa != 0) && (ifa->ifa_addr != 0) &&
(ifa->ifa_addr->sa_family != AF_LINK))
ifa = ifa->ifa_next;
if ((ifa != 0) && (ifa->ifa_addr != 0)) {
sdl = (struct sockaddr_dl *) ifa->ifa_addr;
sdl->sdl_type = IFT_ETHER;
sdl->sdl_alen = ETHER_ADDR_LEN;
sdl->sdl_slen = 0;
bcopy(sc->arpcom.ac_enaddr, LLADDR(sdl), ETHER_ADDR_LEN);
}
/* we give some initial parameters */
sc->rx_avg_pkt = 128;
/*
* NOTE: In all this I multiply everything by 64.
* W_s = the speed the CPU is able to write to the TX FIFO.
* T_s = the speed the board sends the info to the Ether.
* W_s/T_s = 16 (represents 16/64) => W_s = 25 % of T_s.
* This will give us for a packet of 1500 bytes
* tx_start_thresh=1125 and for a pkt of 64 bytes tx_start_threshold=48.
* We prefer to start thinking the CPU is much slower than the Ethernet
* transmission.
*/
sc->tx_rate = TX_INIT_RATE;
sc->tx_counter = 0;
sc->rx_latency = RX_INIT_LATENCY;
sc->rx_early_thresh = RX_INIT_EARLY_THRESH;
#ifdef EP_LOCAL_STATS
sc->rx_no_first = sc->rx_no_mbuf =
sc->rx_bpf_disc = sc->rx_overrunf = sc->rx_overrunl =
sc->tx_underrun = 0;
#endif
ep_fset(F_RX_FIRST);
sc->top = sc->mcur = 0;
#if NBPFILTER > 0
bpfattach(&sc->bpf, ifp, DLT_EN10MB, sizeof(struct ether_header));
#endif
return 1;
}
/*
* The order in here seems important. Otherwise we may not receive
* interrupts. ?!
*/
void
epinit(unit)
int unit;
{
register struct ep_softc *sc = &ep_softc[unit];
register struct ifnet *ifp = &sc->arpcom.ac_if;
int s, i, j;
/*
if (ifp->if_addrlist == (struct ifaddr *) 0)
return;
*/
s = splimp();
while (inw(BASE + EP_STATUS) & S_COMMAND_IN_PROGRESS);
GO_WINDOW(0);
outw(BASE + EP_COMMAND, STOP_TRANSCEIVER);
GO_WINDOW(4);
outw(BASE + EP_W4_MEDIA_TYPE, DISABLE_UTP);
GO_WINDOW(0);
/* Disable the card */
outw(BASE + EP_W0_CONFIG_CTRL, 0);
/* Enable the card */
outw(BASE + EP_W0_CONFIG_CTRL, ENABLE_DRQ_IRQ);
GO_WINDOW(2);
/* Reload the ether_addr. */
for (i = 0; i < 6; i++)
outb(BASE + EP_W2_ADDR_0 + i, sc->arpcom.ac_enaddr[i]);
outw(BASE + EP_COMMAND, RX_RESET);
outw(BASE + EP_COMMAND, TX_RESET);
/* Window 1 is operating window */
GO_WINDOW(1);
for (i = 0; i < 31; i++)
inb(BASE + EP_W1_TX_STATUS);
/* get rid of stray intr's */
outw(BASE + EP_COMMAND, ACK_INTR | 0xff);
outw(BASE + EP_COMMAND, SET_RD_0_MASK | S_5_INTS);
outw(BASE + EP_COMMAND, SET_INTR_MASK | S_5_INTS);
if(ifp->if_flags & IFF_PROMISC)
outw(BASE + EP_COMMAND, SET_RX_FILTER | FIL_INDIVIDUAL |
FIL_GROUP | FIL_BRDCST | FIL_ALL);
else
outw(BASE + EP_COMMAND, SET_RX_FILTER | FIL_INDIVIDUAL |
FIL_GROUP | FIL_BRDCST);
/*
* S.B.
*
* Now behavior was slightly changed:
*
* if any of flags link[0-2] is used and its connector is
* physically present the following connectors are used:
*
* link0 - AUI * highest precedence
* link1 - BNC
* link2 - UTP * lowest precedence
*
* If none of them is specified then
* connector specified in the EEPROM is used
* (if present on card or AUI if not).
*
*/
if(ifp->if_flags & IFF_LINK0 && sc->ep_connectors & AUI) {
/* nothing */
} else if(ifp->if_flags & IFF_LINK1 && sc->ep_connectors & BNC) {
outw(BASE + EP_COMMAND, START_TRANSCEIVER);
DELAY(1000);
} else if(ifp->if_flags & IFF_LINK2 && sc->ep_connectors & UTP) {
GO_WINDOW(4);
outw(BASE + EP_W4_MEDIA_TYPE, ENABLE_UTP);
GO_WINDOW(1);
} else {
GO_WINDOW(0);
j = inw(BASE + EP_W0_ADDRESS_CFG) >> ACF_CONNECTOR_BITS;
GO_WINDOW(1);
switch(j) {
case ACF_CONNECTOR_UTP:
if(sc->ep_connectors & UTP) {
GO_WINDOW(4);
outw(BASE + EP_W4_MEDIA_TYPE, ENABLE_UTP);
GO_WINDOW(1);
}
break;
case ACF_CONNECTOR_BNC:
if(sc->ep_connectors & BNC) {
outw(BASE + EP_COMMAND, START_TRANSCEIVER);
DELAY(1000);
}
break;
case ACF_CONNECTOR_AUI:
/* nothing to do */
break;
default:
printf("ep%d: strange connector type in EEPROM: assuming AUI\n",
unit);
break;
}
}
outw(BASE + EP_COMMAND, RX_ENABLE);
outw(BASE + EP_COMMAND, TX_ENABLE);
ifp->if_flags |= IFF_RUNNING;
ifp->if_flags &= ~IFF_OACTIVE; /* just in case */
sc->tx_rate = TX_INIT_RATE;
sc->tx_counter = 0;
sc->rx_latency = RX_INIT_LATENCY;
sc->rx_early_thresh = RX_INIT_EARLY_THRESH;
#ifdef EP_LOCAL_STATS
sc->rx_no_first = sc->rx_no_mbuf =
sc->rx_bpf_disc = sc->rx_overrunf = sc->rx_overrunl =
sc->tx_underrun = 0;
#endif
ep_fset(F_RX_FIRST);
ep_frst(F_RX_TRAILER);
if (sc->top) {
m_freem(sc->top);
sc->top = sc->mcur = 0;
}
outw(BASE + EP_COMMAND, SET_RX_EARLY_THRESH | sc->rx_early_thresh);
/*
* These clever computations look very interesting
* but the fixed threshold gives near no output errors
* and if it as low as 16 bytes it gives the max. throughput.
* We think that processor is anyway quicker than Ethernet
* (and this should be true for any 386 and higher)
*/
outw(BASE + EP_COMMAND, SET_TX_START_THRESH | 16);
/*
* Store up a bunch of mbuf's for use later. (MAX_MBS). First we free up
* any that we had in case we're being called from intr or somewhere
* else.
*/
sc->last_mb = 0;
sc->next_mb = 0;
epmbuffill((caddr_t) sc, 0);
epstart(ifp);
splx(s);
}
static const char padmap[] = {0, 3, 2, 1};
void
epstart(ifp)
struct ifnet *ifp;
{
register struct ep_softc *sc = &ep_softc[ifp->if_unit];
register u_int len;
register struct mbuf *m;
struct mbuf *top;
int s, pad;
s = splimp();
if (sc->arpcom.ac_if.if_flags & IFF_OACTIVE) {
splx(s);
return;
}
startagain:
/* Sneak a peek at the next packet */
m = sc->arpcom.ac_if.if_snd.ifq_head;
if (m == 0) {
splx(s);
return;
}
#if 0
len = m->m_pkthdr.len;
#else
for (len = 0, top = m; m; m = m->m_next)
len += m->m_len;
#endif
pad = padmap[len & 3];
/*
* The 3c509 automatically pads short packets to minimum ethernet length,
* but we drop packets that are too large. Perhaps we should truncate
* them instead?
*/
if (len + pad > ETHER_MAX_LEN) {
/* packet is obviously too large: toss it */
++sc->arpcom.ac_if.if_oerrors;
IF_DEQUEUE(&sc->arpcom.ac_if.if_snd, m);
m_freem(m);
goto readcheck;
}
if (inw(BASE + EP_W1_FREE_TX) < len + pad + 4) {
/* no room in FIFO */
outw(BASE + EP_COMMAND, SET_TX_AVAIL_THRESH | (len + pad + 4));
sc->arpcom.ac_if.if_flags |= IFF_OACTIVE;
splx(s);
return;
}
IF_DEQUEUE(&sc->arpcom.ac_if.if_snd, m);
outw(BASE + EP_W1_TX_PIO_WR_1, len);
outw(BASE + EP_W1_TX_PIO_WR_1, 0x0); /* Second dword meaningless */
/* compute the Tx start threshold for this packet */
sc->tx_start_thresh = len =
(((len * (64 - sc->tx_rate)) >> 6) & ~3) + 16;
#if 0
/*
* The following string does something strange with the card and
* we get a lot of output errors due to it so it's commented out
* and we use fixed threshold (see above)
*/
outw(BASE + EP_COMMAND, SET_TX_START_THRESH | len);
#endif
for (top = m; m != 0; m = m->m_next)
if(ep_ftst(F_ACCESS_32_BITS)) {
outsl(BASE + EP_W1_TX_PIO_WR_1, mtod(m, caddr_t),
m->m_len / 4);
if (m->m_len & 3)
outsb(BASE + EP_W1_TX_PIO_WR_1,
mtod(m, caddr_t) + m->m_len / 4,
m->m_len & 3);
} else {
outsw(BASE + EP_W1_TX_PIO_WR_1, mtod(m, caddr_t), m->m_len / 2);
if (m->m_len & 1)
outb(BASE + EP_W1_TX_PIO_WR_1,
*(mtod(m, caddr_t) + m->m_len - 1));
}
while (pad--)
outb(BASE + EP_W1_TX_PIO_WR_1, 0); /* Padding */
#if NBPFILTER > 0
if (sc->bpf) {
bpf_mtap(sc->bpf, top);
}
#endif
sc->arpcom.ac_if.if_opackets++;
m_freem(top);
/*
* Every 1024*4 packets we increment the tx_rate if we haven't had
* errors, that in the case it has abnormaly goten too low
*/
if (!(++sc->tx_counter & (1024 * 4 - 1)) &&
sc->tx_rate < TX_INIT_MAX_RATE)
sc->tx_rate++;
/*
* Is another packet coming in? We don't want to overflow the tiny RX
* fifo.
*/
readcheck:
if (inw(BASE + EP_W1_RX_STATUS) & RX_BYTES_MASK) {
/*
* we check if we have packets left, in that case we prepare to come
* back later
*/
if (sc->arpcom.ac_if.if_snd.ifq_head) {
outw(BASE + EP_COMMAND, SET_TX_AVAIL_THRESH |
sc->tx_start_thresh);
}
splx(s);
return;
}
goto startagain;
}
void
epintr(unit)
int unit;
{
int i;
register int status;
register struct ep_softc *sc = &ep_softc[unit];
struct ifnet *ifp = &sc->arpcom.ac_if;
struct mbuf *m;
int x;
x=splbio();
outw(BASE + EP_COMMAND, SET_INTR_MASK); /* disable all Ints */
rescan:
while ((status = inw(BASE + EP_STATUS)) & S_5_INTS) {
/* first acknowledge all interrupt sources */
outw(BASE + EP_COMMAND, ACK_INTR | (status & S_MASK));
if (status & (S_RX_COMPLETE | S_RX_EARLY)) {
epread(sc);
continue;
}
if (status & S_TX_AVAIL) {
/* we need ACK */
sc->arpcom.ac_if.if_flags &= ~IFF_OACTIVE;
GO_WINDOW(1);
inw(BASE + EP_W1_FREE_TX);
epstart(&sc->arpcom.ac_if);
}
if (status & S_CARD_FAILURE) {
#ifdef EP_LOCAL_STATS
printf("\nep%d:\n\tStatus: %x\n", unit, status);
GO_WINDOW(4);
printf("\tFIFO Diagnostic: %x\n", inw(BASE + EP_W4_FIFO_DIAG));
printf("\tStat: %x\n", sc->stat);
printf("\tIpackets=%d, Opackets=%d\n",
sc->arpcom.ac_if.if_ipackets, sc->arpcom.ac_if.if_opackets);
printf("\tNOF=%d, NOMB=%d, BPFD=%d, RXOF=%d, RXOL=%d, TXU=%d\n",
sc->rx_no_first, sc->rx_no_mbuf, sc->rx_bpf_disc, sc->rx_overrunf,
sc->rx_overrunl, sc->tx_underrun);
#else
printf("ep%d: Status: %x\n", unit, status);
#endif
epinit(unit);
splx(x);
return;
}
if (status & S_TX_COMPLETE) {
/* we need ACK. we do it at the end */
/*
* We need to read TX_STATUS until we get a 0 status in order to
* turn off the interrupt flag.
*/
while ((status = inb(BASE + EP_W1_TX_STATUS)) & TXS_COMPLETE) {
if (status & TXS_SUCCES_INTR_REQ);
else if (status & (TXS_UNDERRUN | TXS_JABBER | TXS_MAX_COLLISION)) {
outw(BASE + EP_COMMAND, TX_RESET);
if (status & TXS_UNDERRUN) {
if (sc->tx_rate > 1) {
sc->tx_rate--; /* Actually in steps of 1/64 */
sc->tx_counter = 0; /* We reset it */
}
#ifdef EP_LOCAL_STATS
sc->tx_underrun++;
#endif
} else {
if (status & TXS_JABBER);
else /* TXS_MAX_COLLISION - we shouldn't get here */
++sc->arpcom.ac_if.if_collisions;
}
++sc->arpcom.ac_if.if_oerrors;
outw(BASE + EP_COMMAND, TX_ENABLE);
/*
* To have a tx_avail_int but giving the chance to the
* Reception
*/
if (sc->arpcom.ac_if.if_snd.ifq_head) {
outw(BASE + EP_COMMAND, SET_TX_AVAIL_THRESH | 8);
}
}
outb(BASE + EP_W1_TX_STATUS, 0x0); /* pops up the next
* status */
} /* while */
sc->arpcom.ac_if.if_flags &= ~IFF_OACTIVE;
GO_WINDOW(1);
inw(BASE + EP_W1_FREE_TX);
epstart(&sc->arpcom.ac_if);
} /* end TX_COMPLETE */
}
outw(BASE + EP_COMMAND, C_INTR_LATCH); /* ACK int Latch */
if ((status = inw(BASE + EP_STATUS)) & S_5_INTS)
goto rescan;
/* re-enable Ints */
outw(BASE + EP_COMMAND, SET_INTR_MASK | S_5_INTS);
splx(x);
}
void
epread(sc)
register struct ep_softc *sc;
{
struct ether_header *eh;
struct mbuf *top, *mcur, *m;
int lenthisone;
short rx_fifo2, status;
register short delta;
register short rx_fifo;
status = inw(BASE + EP_W1_RX_STATUS);
read_again:
if (status & ERR_RX) {
++sc->arpcom.ac_if.if_ierrors;
if (status & ERR_RX_OVERRUN) {
/*
* we can think the rx latency is actually greather than we
* expect
*/
#ifdef EP_LOCAL_STATS
if (ep_ftst(F_RX_FIRST))
sc->rx_overrunf++;
else
sc->rx_overrunl++;
#endif
if (sc->rx_latency < ETHERMTU)
sc->rx_latency += 16;
}
goto out;
}
rx_fifo = rx_fifo2 = status & RX_BYTES_MASK;
if (ep_ftst(F_RX_FIRST)) {
if (m = sc->mb[sc->next_mb]) {
sc->mb[sc->next_mb] = 0;
sc->next_mb = (sc->next_mb + 1) % MAX_MBS;
m->m_data = m->m_pktdat;
m->m_flags = M_PKTHDR;
} else {
MGETHDR(m, M_DONTWAIT, MT_DATA);
if (!m)
goto out;
}
sc->top = sc->mcur = top = m;
#define EROUND ((sizeof(struct ether_header) + 3) & ~3)
#define EOFF (EROUND - sizeof(struct ether_header))
top->m_data += EOFF;
/* Read what should be the header. */
insw(BASE + EP_W1_RX_PIO_RD_1,
mtod(top, caddr_t), sizeof(struct ether_header) / 2);
top->m_len = sizeof(struct ether_header);
rx_fifo -= sizeof(struct ether_header);
sc->cur_len = rx_fifo2;
} else {
/* come here if we didn't have a complete packet last time */
top = sc->top;
m = sc->mcur;
sc->cur_len += rx_fifo2;
if (ep_ftst(F_RX_TRAILER))
/* We don't read the trailer */
rx_fifo -= sizeof(struct ether_header);
}
/* Reads what is left in the RX FIFO */
while (rx_fifo > 0) {
lenthisone = min(rx_fifo, M_TRAILINGSPACE(m));
if (lenthisone == 0) { /* no room in this one */
mcur = m;
if (m = sc->mb[sc->next_mb]) {
sc->mb[sc->next_mb] = 0;
sc->next_mb = (sc->next_mb + 1) % MAX_MBS;
} else {
MGET(m, M_DONTWAIT, MT_DATA);
if (!m)
goto out;
}
if (rx_fifo >= MINCLSIZE)
MCLGET(m, M_DONTWAIT);
m->m_len = 0;
mcur->m_next = m;
lenthisone = min(rx_fifo, M_TRAILINGSPACE(m));
}
if (ep_ftst(F_ACCESS_32_BITS)) { /* default for EISA configured cards*/
insl(BASE + EP_W1_RX_PIO_RD_1, mtod(m, caddr_t) + m->m_len,
lenthisone / 4);
m->m_len += (lenthisone & ~3);
if (lenthisone & 3)
insb(BASE + EP_W1_RX_PIO_RD_1,
mtod(m, caddr_t) + m->m_len,
lenthisone & 3);
m->m_len += (lenthisone & 3);
} else {
insw(BASE + EP_W1_RX_PIO_RD_1, mtod(m, caddr_t) + m->m_len,
lenthisone / 2);
m->m_len += lenthisone;
if (lenthisone & 1)
*(mtod(m, caddr_t) + m->m_len - 1) = inb(BASE + EP_W1_RX_PIO_RD_1);
}
rx_fifo -= lenthisone;
}
if (ep_ftst(F_RX_TRAILER)) {/* reads the trailer */
if (m = sc->mb[sc->next_mb]) {
sc->mb[sc->next_mb] = 0;
sc->next_mb = (sc->next_mb + 1) % MAX_MBS;
m->m_data = m->m_pktdat;
m->m_flags = M_PKTHDR;
} else {
MGETHDR(m, M_DONTWAIT, MT_DATA);
if (!m)
goto out;
}
insw(BASE + EP_W1_RX_PIO_RD_1, mtod(m, caddr_t),
sizeof(struct ether_header));
m->m_len = sizeof(struct ether_header);
m->m_next = top;
sc->top = top = m;
/* XXX Accomodate for type and len from beginning of trailer */
sc->cur_len -= (2 * sizeof(u_short));
ep_frst(F_RX_TRAILER);
goto all_pkt;
}
if (status & ERR_RX_INCOMPLETE) { /* we haven't received the complete
* packet */
sc->mcur = m;
#ifdef EP_LOCAL_STATS
sc->rx_no_first++; /* to know how often we come here */
#endif
/*
* Re-compute rx_latency, the factor used is 1/4 to go up and 1/32 to
* go down
*/
delta = rx_fifo2 - sc->rx_early_thresh; /* last latency seen LLS */
delta -= sc->rx_latency;/* LLS - estimated_latency */
if (delta >= 0)
sc->rx_latency += (delta / 4);
else
sc->rx_latency += (delta / 32);
ep_frst(F_RX_FIRST);
if (!((status = inw(BASE + EP_W1_RX_STATUS)) & ERR_RX_INCOMPLETE)) {
/* we see if by now, the packet has completly arrived */
goto read_again;
}
/* compute rx_early_threshold */
delta = (sc->rx_avg_pkt - sc->cur_len - sc->rx_latency - 16) & ~3;
if (delta < MIN_RX_EARLY_THRESHL)
delta = MIN_RX_EARLY_THRESHL;
outw(BASE + EP_COMMAND, SET_RX_EARLY_THRESH |
(sc->rx_early_thresh = delta));
return;
}
all_pkt:
outw(BASE + EP_COMMAND, RX_DISCARD_TOP_PACK);
/*
* recompute average packet's length, the factor used is 1/8 to go down
* and 1/32 to go up
*/
delta = sc->cur_len - sc->rx_avg_pkt;
if (delta > 0)
sc->rx_avg_pkt += (delta / 32);
else
sc->rx_avg_pkt += (delta / 8);
delta = (sc->rx_avg_pkt - sc->rx_latency - 16) & ~3;
if (delta < MIN_RX_EARLY_THRESHF)
delta = MIN_RX_EARLY_THRESHF;
sc->rx_early_thresh = delta;
++sc->arpcom.ac_if.if_ipackets;
ep_fset(F_RX_FIRST);
ep_frst(F_RX_TRAILER);
top->m_pkthdr.rcvif = &sc->arpcom.ac_if;
top->m_pkthdr.len = sc->cur_len;
#if NBPFILTER > 0
if (sc->bpf) {
bpf_mtap(sc->bpf, top);
/*
* 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.
*/
eh = mtod(top, struct ether_header *);
if ((sc->arpcom.ac_if.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) {
if (sc->top) {
m_freem(sc->top);
sc->top = 0;
}
ep_fset(F_RX_FIRST);
ep_frst(F_RX_TRAILER);
#ifdef EP_LOCAL_STATS
sc->rx_bpf_disc++;
#endif
while (inw(BASE + EP_STATUS) & S_COMMAND_IN_PROGRESS);
outw(BASE + EP_COMMAND, SET_RX_EARLY_THRESH | delta);
return;
}
}
#endif
eh = mtod(top, struct ether_header *);
m_adj(top, sizeof(struct ether_header));
ether_input(&sc->arpcom.ac_if, eh, top);
if (!sc->mb[sc->next_mb])
epmbuffill((caddr_t) sc, 0);
sc->top = 0;
while (inw(BASE + EP_STATUS) & S_COMMAND_IN_PROGRESS);
outw(BASE + EP_COMMAND, SET_RX_EARLY_THRESH | delta);
return;
out:
outw(BASE + EP_COMMAND, RX_DISCARD_TOP_PACK);
if (sc->top) {
m_freem(sc->top);
sc->top = 0;
#ifdef EP_LOCAL_STATS
sc->rx_no_mbuf++;
#endif
}
delta = (sc->rx_avg_pkt - sc->rx_latency - 16) & ~3;
if (delta < MIN_RX_EARLY_THRESHF)
delta = MIN_RX_EARLY_THRESHF;
ep_fset(F_RX_FIRST);
ep_frst(F_RX_TRAILER);
while (inw(BASE + EP_STATUS) & S_COMMAND_IN_PROGRESS);
outw(BASE + EP_COMMAND, SET_RX_EARLY_THRESH |
(sc->rx_early_thresh = delta));
}
/*
* Look familiar?
*/
static int
epioctl(ifp, cmd, data)
register struct ifnet *ifp;
int cmd;
caddr_t data;
{
register struct ifaddr *ifa = (struct ifaddr *) data;
struct ep_softc *sc = &ep_softc[ifp->if_unit];
struct ifreq *ifr = (struct ifreq *) data;
int s, error = 0;
s = splimp();
switch (cmd) {
case SIOCSIFADDR:
ifp->if_flags |= IFF_UP;
switch (ifa->ifa_addr->sa_family) {
#ifdef INET
case AF_INET:
epinit(ifp->if_unit); /* before arpwhohas */
arp_ifinit((struct arpcom *)ifp, ifa);
break;
#endif
#ifdef NS
case AF_NS:
{
register struct ns_addr *ina = &(IA_SNS(ifa)->sns_addr);
if (ns_nullhost(*ina))
ina->x_host =
*(union ns_host *) (sc->arpcom.ac_enaddr);
else {
ifp->if_flags &= ~IFF_RUNNING;
bcopy((caddr_t) ina->x_host.c_host,
(caddr_t) sc->arpcom.ac_enaddr,
sizeof(sc->arpcom.ac_enaddr));
}
epinit(ifp->if_unit);
break;
}
#endif
default:
epinit(ifp->if_unit);
break;
}
break;
case SIOCSIFFLAGS:
if ((ifp->if_flags & IFF_UP) == 0 && ifp->if_flags & IFF_RUNNING) {
ifp->if_flags &= ~IFF_RUNNING;
epstop(ifp->if_unit);
epmbufempty(sc);
break;
} else {
/* reinitialize card on any parameter change */
epinit(ifp->if_unit);
break;
}
/* NOTREACHED */
if (ifp->if_flags & IFF_UP && (ifp->if_flags & IFF_RUNNING) == 0)
epinit(ifp->if_unit);
if ( (ifp->if_flags & IFF_PROMISC) && !ep_ftst(F_PROMISC) ) {
ep_fset(F_PROMISC);
epinit(ifp->if_unit);
}
else if( !(ifp->if_flags & IFF_PROMISC) && ep_ftst(F_PROMISC) ) {
ep_frst(F_PROMISC);
epinit(ifp->if_unit);
}
break;
#ifdef notdef
case SIOCGHWADDR:
bcopy((caddr_t) sc->sc_addr, (caddr_t) & ifr->ifr_data,
sizeof(sc->sc_addr));
break;
#endif
case SIOCSIFMTU:
/*
* Set the interface MTU.
*/
if (ifr->ifr_mtu > ETHERMTU) {
error = EINVAL;
} else {
ifp->if_mtu = ifr->ifr_mtu;
}
break;
default:
error = EINVAL;
}
splx(s);
return (error);
}
void
epreset(unit)
int unit;
{
int s = splimp();
epstop(unit);
epinit(unit);
splx(s);
}
void
epwatchdog(unit)
int unit;
{
struct ep_softc *sc = &ep_softc[unit];
struct ifnet *ifp=&sc->arpcom.ac_if;
/*
printf("ep: watchdog\n");
log(LOG_ERR, "ep%d: watchdog\n", unit);
++sc->arpcom.ac_if.if_oerrors;
*/
/* epreset(unit); */
ifp->if_flags &= ~IFF_OACTIVE;
epstart(ifp);
epintr(unit);
ifp->if_timer=1;
}
void
epstop(unit)
int unit;
{
struct ep_softc *sc = &ep_softc[unit];
outw(BASE + EP_COMMAND, RX_DISABLE);
outw(BASE + EP_COMMAND, RX_DISCARD_TOP_PACK);
while (inw(BASE + EP_STATUS) & S_COMMAND_IN_PROGRESS);
outw(BASE + EP_COMMAND, TX_DISABLE);
outw(BASE + EP_COMMAND, STOP_TRANSCEIVER);
outw(BASE + EP_COMMAND, RX_RESET);
outw(BASE + EP_COMMAND, TX_RESET);
outw(BASE + EP_COMMAND, C_INTR_LATCH);
outw(BASE + EP_COMMAND, SET_RD_0_MASK);
outw(BASE + EP_COMMAND, SET_INTR_MASK);
outw(BASE + EP_COMMAND, SET_RX_FILTER);
}
static int
send_ID_sequence(port)
int port;
{
int cx, al;
for (al = 0xff, cx = 0; cx < 255; cx++) {
outb(port, al);
al <<= 1;
if (al & 0x100)
al ^= 0xcf;
}
return (1);
}
/*
* We get eeprom data from the id_port given an offset into the eeprom.
* Basically; after the ID_sequence is sent to all of the cards; they enter
* the ID_CMD state where they will accept command requests. 0x80-0xbf loads
* the eeprom data. We then read the port 16 times and with every read; the
* cards check for contention (ie: if one card writes a 0 bit and another
* writes a 1 bit then the host sees a 0. At the end of the cycle; each card
* compares the data on the bus; if there is a difference then that card goes
* into ID_WAIT state again). In the meantime; one bit of data is returned in
* the AX register which is conveniently returned to us by inb(). Hence; we
* read 16 times getting one bit of data with each read.
*/
static int
get_eeprom_data(id_port, offset)
int id_port;
int offset;
{
int i, data = 0;
outb(id_port, 0x80 + offset);
DELAY(1000);
for (i = 0; i < 16; i++)
data = (data << 1) | (inw(id_port) & 1);
return (data);
}
/*
* We suppose this is always called inside a splimp(){...}splx() region
*/
static void
epmbuffill(sp, dummy_arg)
caddr_t sp;
int dummy_arg;
{
struct ep_softc *sc = (struct ep_softc *) sp;
int i;
i = sc->last_mb;
do {
if (sc->mb[i] == NULL)
MGET(sc->mb[i], M_DONTWAIT, MT_DATA);
if (sc->mb[i] == NULL)
break;
i = (i + 1) % MAX_MBS;
} while (i != sc->next_mb);
sc->last_mb = i;
}
static void
epmbufempty(sc)
struct ep_softc *sc;
{
int s, i;
s = splimp();
for (i = 0; i < MAX_MBS; i++) {
if (sc->mb[i]) {
m_freem(sc->mb[i]);
sc->mb[i] = NULL;
}
}
sc->last_mb = sc->next_mb = 0;
splx(s);
}
#endif /* NEP > 0 */
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