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4ff3de8e80
freebsd/sys/i386/isa/if_ix.c
Bruce Evans 4ff3de8e80 Added `#include "ioconf.h"' to <machine/conf.h> and cleaned up the 
misplaced extern declarations (mostly prototypes of interrupt handlers)
that this exposed.  The prototypes should be moved back to the driver
sources when the functions are staticalized.

Added idempotency guards to <machine/conf.h>.  "ioconf.h" can't be
included when building LKMs so define a wart in bsd.kmod.mk to help
guard against including it.
1995-11-04 17:08:13 +00:00

1685 lines
45 KiB
C
Raw Blame History

/*
* Copyright (c) 1993, 1994, 1995
* Rodney W. Grimes, Milwaukie, Oregon 97222. 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 as
* the first lines of this file unmodified.
* 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 Rodney W. Grimes.
* 4. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY RODNEY W. GRIMES ``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 RODNEY W. GRIMES 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.
*
* $Id: if_ix.c,v 1.13 1995/10/31 18:41:11 phk Exp $
*/
#include "ix.h"
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/mbuf.h>
#include <sys/socket.h>
#include <sys/ioctl.h>
#include <sys/errno.h>
#include <sys/syslog.h>
#include <sys/devconf.h>
#include <machine/clock.h>
#include <net/if.h>
#include <net/if_types.h>
#include <net/if_dl.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 /* INET */
#ifdef IPX /*ZZZ no work done on this, this is just here to remind me*/
#include <netipx/ipx.h>
#include <netipx/ipx_if.h>
#endif /* IPX */
#ifdef NS /*ZZZ no work done on this, this is just here to remind me*/
#include <netns/ns.h>
#include <netns/ns_if.h>
#endif /* NS */
#ifdef ISO /*ZZZ no work done on this, this is just here to remind me*/
#include <netiso/iso.h>
#include <netiso/iso_var.h>
extern char all_es_snpa[], all_is_snpa[], all_l1is_snpa[], all_l2is_snpa[];
#endif /* ISO */
/*ZZZ no work done on this, this is just here to remind me*/
#include "bpfilter.h"
#if NBPFILTER > 0
#include <net/bpf.h>
#include <net/bpfdesc.h>
#endif /* NBPFILTER > 0 */
#include <i386/isa/isa_device.h>
#include <i386/isa/icu.h>
#include <i386/isa/if_ixreg.h>
ix_softc_t ix_softc[NIX];
#define DEBUGNONE 0x0000
#define DEBUGPROBE 0x0001
#define DEBUGATTACH (DEBUGPROBE << 1)
#define DEBUGINIT (DEBUGATTACH << 1)
#define DEBUGINIT_RFA (DEBUGINIT << 1)
#define DEBUGINIT_TFA (DEBUGINIT_RFA << 1)
#define DEBUGINTR (DEBUGINIT_TFA << 1)
#define DEBUGINTR_FR (DEBUGINTR << 1)
#define DEBUGINTR_CX (DEBUGINTR_FR << 1)
#define DEBUGSTART (DEBUGINTR_CX << 1)
#define DEBUGSTOP (DEBUGSTART << 1)
#define DEBUGRESET (DEBUGSTOP << 1)
#define DEBUGDONE (DEBUGRESET << 1)
#define DEBUGIOCTL (DEBUGDONE << 1)
#define DEBUGACK (DEBUGIOCTL << 1)
#define DEBUGCA (DEBUGACK << 1)
#define DEBUGCB_WAIT (DEBUGCA << 1)
#define DEBUGALL 0xFFFFFFFF
/*
#define IXDEBUG (DEBUGPROBE | DEBUGINIT | DEBUGSTOP | DEBUGCB_WAIT)
*/
#ifdef IXDEBUG
int ixdebug=IXDEBUG;
#define DEBUGBEGIN(flag) \
{\
if (ixdebug & flag)\
{
#define DEBUGEND \
}\
}
#define DEBUGDO(x) x
#else /* IXDEBUG */
#define DEBUGBEGIN(flag)
#define DEBUGEND
#define DEBUGDO(x)
#endif /* IXDEBUG */
/*
* Enable the exteneded ixcounters by using #define IXCOUNTERS, note that
* this requires a modification to the ifnet structure to add the counters
* in. Some day a standard extended ifnet structure will be done so that
* additional statistics can be gathered for any board that supports these
* counters.
*/
#ifdef IXCOUNTERS
#define IXCOUNTER(x) x
#else /* IXCOUNTERS */
#define IXCOUNTER(x)
#endif /* IXCOUNTERS */
/*
* Function Prototypes
*/
static inline void ixinterrupt_enable(int);
static inline void ixinterrupt_disable(int);
static inline void ixchannel_attention(int);
static u_short ixacknowledge(int);
static int ix_cb_wait(cb_t *, char *);
static int ix_scb_wait(scb_t *, u_short, char *);
static int ixprobe(struct isa_device *);
static int ixattach(struct isa_device *);
static void ixinit(int);
static void ixinit_rfa(int);
static void ixinit_tfa(int);
static inline void ixintr_cx(int);
static inline void ixintr_cx_free(int, cb_t *);
static inline void ixintr_fr(int);
static inline void ixintr_fr_copy(int, rfd_t *);
static inline void ixintr_fr_free(int, rfd_t *);
static void ixstart(struct ifnet *);
static int ixstop(struct ifnet *);
static int ixdone(struct ifnet *);
static int ixioctl(struct ifnet *, int, caddr_t);
static void ixreset(int);
static void ixwatchdog(int);
static u_short ixeeprom_read(int, int);
static void ixeeprom_outbits(int, int, int);
static int ixeeprom_inbits(int);
static void ixeeprom_clock(int, int);
/*
RRR */
struct isa_driver ixdriver = {ixprobe, ixattach, "ix"};
static struct kern_devconf kdc_ix_template = {
0, 0, 0, /* filled in by dev_attach */
"ix", 0, { MDDT_ISA, 0, "net" },
isa_generic_externalize, 0, 0, ISA_EXTERNALLEN,
&kdc_isa0, /* parent */
0, /* parentdata */
DC_UNCONFIGURED, /* state */
"", /* description */
DC_CLS_NETIF /* class */
};
static inline void
ix_registerdev(struct isa_device *id, const char *descr)
{
struct kern_devconf *kdc = &ix_softc[id->id_unit].kdc;
*kdc = kdc_ix_template;
kdc->kdc_unit = id->id_unit;
kdc->kdc_parentdata = id;
kdc->kdc_description = descr;
dev_attach(kdc);
}
/*
* Enable the interrupt signal on the board so that it may interrupt
* the host.
*/
static inline void
ixinterrupt_enable(int unit) {
ix_softc_t *sc = &ix_softc[unit];
outb(sc->iobase + sel_irq, sc->irq_encoded | IRQ_ENABLE);
}
/*
* Disable the interrupt signal on the board so that it will not interrupt
* the host.
*/
static inline void
ixinterrupt_disable(int unit) {
ix_softc_t *sc = &ix_softc[unit];
outb(sc->iobase + sel_irq, sc->irq_encoded);
}
/*
* Send a channel attention to the 82586 chip
*/
static inline void
ixchannel_attention(int unit) {
DEBUGBEGIN(DEBUGCA)
DEBUGDO(printf("ca");)
DEBUGEND
outb(ix_softc[unit].iobase + ca_ctrl, 0);
}
u_short
ixacknowledge(int unit) {
ix_softc_t *sc = &ix_softc[unit];
scb_t *scb = (scb_t *)(sc->maddr + SCB_ADDR);
u_short status;
int i;
DEBUGBEGIN(DEBUGACK)
DEBUGDO(printf("ack:");)
DEBUGEND
status = scb->status;
scb->command = status & SCB_ACK_MASK;
if ((status & SCB_ACK_MASK) != 0) {
ixchannel_attention(unit);
for (i = 1000000; scb->command && (i > 0); i--); /*ZZZ timeout*/
if (i == 0) {
printf(".TO=%x:", scb->command);
printf("\nshutting down\n");
ixinterrupt_disable(unit);
sc->flags = IXF_NONE;
status = 0;
} else {
DEBUGBEGIN(DEBUGACK)
DEBUGDO(printf(".ok:");)
DEBUGEND
}
} else {
/* nothing to acknowledge */
DEBUGBEGIN(DEBUGACK)
DEBUGDO(printf("NONE:");)
DEBUGEND
}
DEBUGBEGIN(DEBUGACK)
DEBUGDO(printf("%x ", status);)
DEBUGEND
return(status);
}
int
ix_cb_wait(cb_t *cb, char *message) {
int i;
int status;
for (i=1000000; i>0; i--) {
if (cb->status & CB_COMPLETE) break; /* Wait for done */
}
if (i == 0) {
printf("%s timeout cb->status = %x\n", message, cb->status);
status = 1;
} else {
DEBUGBEGIN(DEBUGCB_WAIT)
DEBUGDO(printf("%s cb ok count = %d\n", message, i);)
DEBUGEND
status = 0;
}
return (status);
}
int
ix_scb_wait(scb_t *scb, u_short expect, char *message) {
int i;
int status;
for (i=1000000; i>0; i--) {
if (scb->status == expect) break; /* Wait for done */
}
if (i == 0) {
printf("%s timeout scb->status = %x\n", message, scb->status);
status = 1;
} else {
DEBUGBEGIN(DEBUGINIT)
DEBUGDO(printf("%s scb ok count = %d\n", message, i);)
DEBUGEND
status = 0;
}
return (status);
}
int
ixprobe(struct isa_device *dvp) {
int unit = dvp->id_unit;
ix_softc_t *sc = &ix_softc[unit];
char tempid, idstate;
int i;
int status = 0;
u_short boardid,
checksum,
connector,
eaddrtemp,
irq;
/* ZZZ irq_translate should really be unsigned, but until
* isa_device.h and all uses are fixed we have to live with it */
short irq_translate[] = {0, IRQ9, IRQ3, IRQ4, IRQ5, IRQ10, IRQ11, 0};
char irq_encode[] = { 0, 0, 0, 2, 3, 4, 0, 0, 0, 1, 5, 6, 0, 0, 0, 0 };
DEBUGBEGIN(DEBUGPROBE)
DEBUGDO(printf ("ixprobe:");)
DEBUGEND
/*
* Since Intel gives us such a nice way to ID this board lets
* see if we really have one at this I/O address
*/
idstate = inb(dvp->id_iobase + autoid) & 0x03;
for (i=0, boardid=0; i < 4; i++) {
tempid = inb(dvp->id_iobase + autoid);
boardid |= ((tempid & 0xF0) >> 4) << ((tempid & 0x03) << 2);
if ((tempid & 0x03) != (++idstate & 0x03)) {
/* out of sequence, destroy boardid and bail out */
boardid = 0;
break;
}
}
DEBUGBEGIN(DEBUGPROBE)
DEBUGDO(printf("boardid = %x\n", boardid);)
DEBUGEND
if (boardid != BOARDID) {
goto ixprobe_exit;
}
/*
* We now know that we have a board, so save the I/O base
* address in the softc and use the softc from here on out
*/
sc->iobase = dvp->id_iobase;
/*
* Reset the Bart ASIC by pulsing the reset bit and waiting
* the required 240 uSecounds. Also place the 82856 in the reset
* mode so that we can access the EEPROM
*/
outb(sc->iobase + ee_ctrl, GA_RESET);
outb(sc->iobase + ee_ctrl, 0);
DELAY(240);
outb(sc->iobase + ee_ctrl, I586_RESET);
/*
* Checksum the EEPROM, should be equal to BOARDID
*/
for (i=0, checksum=0; i<64; i++) {
checksum += ixeeprom_read(unit, i);
}
DEBUGBEGIN(DEBUGPROBE)
DEBUGDO(printf ("checksum = %x\n", checksum);)
DEBUGEND
if (checksum != BOARDID) {
goto ixprobe_exit;
}
/*
* Do the I/O channel ready test
*/
{
u_char lock_bit;
lock_bit = ixeeprom_read(unit, eeprom_lock_address);
if (lock_bit & EEPROM_LOCKED) {
DEBUGBEGIN(DEBUGPROBE)
DEBUGDO(printf ("lockbit set, no doing io channel ready test\n");)
DEBUGEND
} else {
u_char bart_config,
junk;
bart_config = inb(sc->iobase + config);
bart_config |= BART_IOCHRDY_LATE | BART_IO_TEST_EN;
outb(sc->iobase + config, bart_config);
junk = inb(sc->iobase + 0x4000); /*XXX read junk */
bart_config = inb(sc->iobase + config);
outb(sc->iobase + config, bart_config & ~(BART_IO_TEST_EN));
if (bart_config & BART_IO_RESULT) {
printf ("iochannel ready test failed!!\n");
} else {
DEBUGBEGIN(DEBUGPROBE)
DEBUGDO(printf ("iochannel ready test passed\n");)
DEBUGEND
}
}
}
/*
* Size and test the memory on the board. The size of the memory
* can be one of 16k, 32k, 48k or 64k. It can be located in the
* address range 0xC0000 to 0xEFFFF on 16k boundaries. Although
* the board can be configured for 0xEC0000 to 0xEEFFFF,
* or 0xFC0000 to 0xFFFFFF these ranges are not supported by 386bsd.
*
* If the size does not match the passed in memory allocation size
* issue a warning, but continue with the minimum of the two sizes.
*/
{
u_short memory_page;
u_short memory_adjust;
u_short memory_decode;
u_short memory_edecode;
switch (dvp->id_msize) {
case 65536:
case 32768: /* XXX Only support 32k and 64k right now */
{ break; }
case 16384:
case 49512:
default: {
printf("ixprobe mapped memory size out of range\n");
goto ixprobe_exit;
}
}
if ((kvtop(dvp->id_maddr) < 0xC0000) ||
(kvtop(dvp->id_maddr) + dvp->id_msize > 0xF0000)) {
printf("ixprobe mapped memory address out of range\n");
goto ixprobe_exit;
}
memory_page = (kvtop(dvp->id_maddr) & 0x3C000) >> 14;
memory_adjust = MEMCTRL_FMCS16 | (memory_page & 0x3) << 2;
memory_decode = ((1 << (dvp->id_msize / 16384)) - 1) << memory_page;
memory_edecode = ((~memory_decode >> 4) & 0xF0) | (memory_decode >> 8);
/* ZZZ This should be checked against eeprom location 6, low byte */
outb(sc->iobase + memdec, memory_decode & 0xFF);
/* ZZZ This should be checked against eeprom location 1, low byte */
outb(sc->iobase + memctrl, memory_adjust);
/* ZZZ Now if I could find this one I would have it made */
outb(sc->iobase + mempc, (~memory_decode & 0xFF));
/* ZZZ I think this is location 6, high byte */
outb(sc->iobase + memectrl, memory_edecode); /*XXX disable Exxx */
sc->maddr = dvp->id_maddr;
sc->msize = dvp->id_msize;
DEBUGBEGIN(DEBUGPROBE)
DEBUGDO(printf("Physical address = %lx\n", kvtop(sc->maddr));)
DEBUGEND
}
/*
* first prime the stupid bart DRAM controller so that it
* works, then zero out all or memory.
*/
bzero(sc->maddr, 32);
bzero(sc->maddr, sc->msize);
/*
* Get the type of connector used, either AUI, BNC or TPE.
*/
connector = ixeeprom_read(unit, eeprom_config1);
if (connector & CONNECT_BNCTPE) {
connector = ixeeprom_read(unit, eeprom_config2);
if (connector & CONNECT_TPE) {
sc->connector = TPE;
DEBUGBEGIN(DEBUGPROBE)
DEBUGDO(printf ("Using TPE connector\n");)
DEBUGEND
} else {
sc->connector = BNC;
DEBUGBEGIN(DEBUGPROBE)
DEBUGDO(printf ("Using BNC connector\n");)
DEBUGEND
}
} else {
sc->connector = AUI;
DEBUGBEGIN(DEBUGPROBE)
DEBUGDO(printf ("Using AUI connector\n");)
DEBUGEND
}
/*
* Get the encoded interrupt number from the EEPROM, check it
* against the passed in IRQ. Issue a warning if they do not
* match. Always use the passed in IRQ, not the one in the EEPROM.
*/
irq = ixeeprom_read(unit, eeprom_config1);
irq = (irq & IRQ) >> IRQ_SHIFT;
irq = irq_translate[irq];
if (dvp->id_irq > 0) {
if (irq != dvp->id_irq) {
printf("ix%d: WARNING: board is configured for IRQ %d, using %d\n",
unit, ffs(irq) - 1, ffs(dvp->id_irq) - 1);
irq = dvp->id_irq;
}
} else {
dvp->id_irq = irq;
}
sc->irq_encoded = irq_encode[ffs(irq) - 1];
if (sc->irq_encoded == 0) {
printf("ix%d: invalid irq (%d)\n", unit, ffs(irq) - 1);
goto ixprobe_exit;
}
/*
* Get the slot width, either 8 bit or 16 bit.
*/
if (inb(sc->iobase + config) & SLOT_WIDTH) {
sc->width = WIDTH_16;
DEBUGBEGIN(DEBUGPROBE)
DEBUGDO(printf("Using 16-bit slot\n");)
DEBUGEND
} else {
sc->width = WIDTH_8;
DEBUGBEGIN(DEBUGPROBE)
DEBUGDO(printf("Using 8-bit slot\n");)
DEBUGEND
}
/*
* Get the hardware ethernet address from the EEPROM and
* save it in the softc for use by the 586 setup code.
*/
eaddrtemp = ixeeprom_read(unit, eeprom_enetaddr_high);
sc->arpcom.ac_enaddr[1] = eaddrtemp & 0xFF;
sc->arpcom.ac_enaddr[0] = eaddrtemp >> 8;
eaddrtemp = ixeeprom_read(unit, eeprom_enetaddr_mid);
sc->arpcom.ac_enaddr[3] = eaddrtemp & 0xFF;
sc->arpcom.ac_enaddr[2] = eaddrtemp >> 8;
eaddrtemp = ixeeprom_read(unit, eeprom_enetaddr_low);
sc->arpcom.ac_enaddr[5] = eaddrtemp & 0xFF;
sc->arpcom.ac_enaddr[4] = eaddrtemp >> 8;
sc->flags = IXF_NONE; /* make sure the flag word is NONE */
status = IX_IO_PORTS;
#ifndef DEV_LKM
ix_registerdev(dvp, "Ethernet adapter: Intel EtherExpress16");
#endif /* not DEV_LKM */
ixprobe_exit:
DEBUGBEGIN(DEBUGPROBE)
DEBUGDO(printf ("ixprobe exited\n");)
DEBUGEND
return(status);
}
int
ixattach(struct isa_device *dvp) {
int unit = dvp->id_unit;
ix_softc_t *sc = &ix_softc[unit];
struct ifnet *ifp = &sc->arpcom.ac_if;
struct ifaddr *ifa;
struct sockaddr_dl *sdl;
DEBUGBEGIN(DEBUGATTACH)
DEBUGDO(printf("ixattach:");)
DEBUGEND
/*
* Fill in the interface parameters for if_attach
* Note: We could save some code here by first using a
* bzero(ifp, sizeof(ifp)); and then not doing all
* the = 0;'s
* Infact we should bzero this just to make sure
* that something does not get missed.
* Further note by GW:
* Actually, it's a complete waste of time to zero any of
* this stuff because the C language guarantees that it's
* already zeroed. If this code is changed to do dynamic
* allocation, this will have to get revisited.
*/
bzero(ifp, sizeof(ifp));
ifp->if_name = ixdriver.name;
ifp->if_unit = unit;
ifp->if_mtu = ETHERMTU;
ifp->if_flags = IFF_SIMPLEX | IFF_BROADCAST;
ifp->if_init = ixinit;
ifp->if_output = ether_output;
ifp->if_start = ixstart;
ifp->if_done = ixdone;
ifp->if_ioctl = ixioctl;
ifp->if_reset = ixreset;
ifp->if_watchdog = ixwatchdog;
ifp->if_type = IFT_ETHER;
ifp->if_addrlen = ETHER_ADDRESS_LENGTH;
ifp->if_hdrlen = ETHER_HEADER_LENGTH;
#ifdef IXCOUNTERS
/*
* ZZZ more counters added, but bzero gets them
*/
#endif /* IXCOUNTERS */
if_attach(ifp);
sc->kdc.kdc_state = DC_IDLE;
/* Search down the ifa address list looking for the AF_LINK type entry */
ifa = ifp->if_addrlist;
while ((ifa != 0) &&
(ifa->ifa_addr != 0) &&
(ifa->ifa_addr->sa_family != AF_LINK)) {
ifa = ifa->ifa_next;
}
/* If we find an AF_LINK type entry, we well fill in the hardware addr */
if ((ifa != 0) && (ifa->ifa_addr != 0)) {
/* Fill in the link level address for this interface */
sdl = (struct sockaddr_dl *)ifa->ifa_addr;
sdl->sdl_type = IFT_ETHER;
sdl->sdl_alen = ETHER_ADDRESS_LENGTH;
sdl->sdl_slen = 0;
bcopy(sc->arpcom.ac_enaddr, LLADDR(sdl), ETHER_ADDRESS_LENGTH);
}
printf("ix%d: address %s\n", unit, ether_sprintf(sc->arpcom.ac_enaddr));
return(0);
}
void
ixinit(int unit) {
ix_softc_t *sc = &ix_softc[unit];
struct ifnet *ifp = &sc->arpcom.ac_if;
scp_t *scp = (scp_t *)(sc->maddr + SCP_ADDR);
iscp_t *iscp = (iscp_t *)(sc->maddr + ISCP_ADDR);
scb_t *scb = (scb_t *)(sc->maddr + SCB_ADDR);
cb_t *cb;
tbd_t *tbd;
int i;
u_char bart_config; /* bart config byte */
int status = 0;
DEBUGBEGIN(DEBUGINIT)
DEBUGDO(printf("ixinit:");)
DEBUGEND
sc->kdc.kdc_state = DC_BUSY;
/* Put bart into loopback until we are done intializing to
* make sure that packets don't hit the wire */
bart_config = inb(sc->iobase + config);
bart_config |= BART_LOOPBACK;
bart_config |= BART_MCS16_TEST; /* inb does not get this bit! */
outb(sc->iobase + config, bart_config);
bart_config = inb(sc->iobase + config);
scp->unused1 = 0; /* Intel says to put zeros in it */
scp->sysbus = sc->width; /* ZZZ need to fix for 596 */
scp->unused2 = 0; /* Intel says to put zeros in it */
scp->unused3 = 0; /* Intel says to put zeros in it */
scp->iscp = ISCP_ADDR;
iscp->busy = ISCP_BUSY;
iscp->scb_offset = SCB_ADDR;
iscp->scb_base = TFA_START;
scb->status = SCB_STAT_NULL;
scb->command = SCB_RESET;
scb->cbl_offset = TFA_START;
scb->rfa_offset = RFA_START;
scb->crc_errors = 0;
scb->aln_errors = 0;
scb->rsc_errors = 0;
scb->ovr_errors = 0;
ixinit_tfa(unit);
ixinit_rfa(unit);
cb = sc->cb_head;
tbd = sc->tbd_head;
/*
* remove the reset signal and start the 586 up, the 586 well read
* the SCP, ISCP and the reset CB. This should put it into a
* known state: RESET!
*/
outb(sc->iobase + ee_ctrl, EENORMAL);
ixchannel_attention(unit);
for (i=100000; iscp->busy && (i>0); i--); /* Wait for done */
if (i == 0) {
printf("iscp->busy time out\n");
status = 1;
} else {
DEBUGBEGIN(DEBUGINIT)
DEBUGDO(printf ("iscp->busy did not timeout = %d\n", i);)
DEBUGEND
}
status |= ix_scb_wait(scb, (u_short)(SCB_STAT_CX | SCB_STAT_CNA),
"Reset");
ixacknowledge(unit);
/* XXX this belongs some place else, run diagnostics on the 586 */
{
cb_diagnose_t *cb_diag = (cb_diagnose_t *)(cb);
cb_diag->common.status = 0;
cb_diag->common.command = CB_CMD_EL | CB_CMD_DIAGNOSE;
scb->command = SCB_CUC_START;
ixchannel_attention(unit);
status |= ix_cb_wait((cb_t *)cb_diag, "Diagnose");
status |= ix_scb_wait(scb, (u_short)SCB_STAT_CNA, "Diagnose");
ixacknowledge(unit);
}
/* XXX end this belongs some place else, run diagnostics on the 586 */
/* XXX this belongs some place else, run configure on the 586 */
{
cb_configure_t *cb_conf = (cb_configure_t *)(cb);
cb_conf->common.status = 0;
cb_conf->common.command = CB_CMD_EL | CB_CMD_CONF;
cb_conf->byte[0] = 12; /* 12 byte configure block */
cb_conf->byte[1] = 8; /* fifo limit at 8 bytes */
cb_conf->byte[2] = 0x40; /* don't save bad frames,
srdy/ardy is srdy */
cb_conf->byte[3] = 0x2E; /* address length is 6 bytes,
address and length are in tb,
preamble length is 8 bytes,
internal loopback off,
external loopback off */
cb_conf->byte[4] = 0; /* linear priority is 0,
ACR (Exponential priorty) is 0,
exponential backoff is 802.3 */
cb_conf->byte[5] = 96; /* interframe spacing in TxC clocks */
cb_conf->byte[6] = 0; /* lower 8 bits of slot time */
cb_conf->byte[7] = 0xf2; /* upper slot time (512 bits),
15 transmision retries */
cb_conf->byte[8] = 0; /* promiscuous mode off,
broadcast enabled,
nrz encodeing,
cease transmission if ^CRS,
insert crc,
end of carrier mode bit stuffing,
no padding */
cb_conf->byte[9] = 0; /* carrier sense filter = 0 bits,
carrier sense source external,
collision detect filter = 0 bits,
collision detect source external */
cb_conf->byte[10] = 60; /* minimum number of bytes is a frame */
cb_conf->byte[11] = 0; /* unused */
scb->command = SCB_CUC_START;
ixchannel_attention(unit);
status |= ix_cb_wait((cb_t *)cb_conf, "Configure");
status |= ix_scb_wait(scb, (u_short)SCB_STAT_CNA, "Configure");
ixacknowledge(unit);
}
/* XXX end this belongs some place else, run configure on the 586 */
/* XXX this belongs some place else, run ias on the 586 */
{
cb_ias_t *cb_ias = (cb_ias_t *)(cb);
cb_ias->common.status = 0;
cb_ias->common.command = CB_CMD_EL | CB_CMD_IAS;
bcopy(sc->arpcom.ac_enaddr, cb_ias->source, ETHER_ADDRESS_LENGTH);
scb->command = SCB_CUC_START;
ixchannel_attention(unit);
status |= ix_cb_wait((cb_t *)cb_ias, "IAS");
status |= ix_scb_wait(scb, (u_short)SCB_STAT_CNA, "IAS");
ixacknowledge(unit);
}
/* XXX end this belongs some place else, run ias on the 586 */
if (status == 0) {
/* Take bart out of loopback as we are done intializing */
bart_config = inb(sc->iobase + config);
bart_config &= ~BART_LOOPBACK;
bart_config |= BART_MCS16_TEST; /* inb does not get this bit! */
outb(sc->iobase + config, bart_config);
/* The above code screwed with the tfa, reinit it! */
ixinit_tfa(unit);
scb->command = SCB_RUC_START; /* start up the receive unit */
ixchannel_attention(unit);
sc->flags |= IXF_INITED; /* we have been initialized */
ifp->if_flags |= IFF_RUNNING;
ifp->if_flags &= ~IFF_OACTIVE;
ixinterrupt_enable(unit); /* Let err fly!!! */
}
DEBUGBEGIN(DEBUGINIT)
DEBUGDO(printf("ixinit exited\n");)
DEBUGEND
return;
}
/*
* ixinit_rfa(int unit)
*
* This routine initializes the Receive Frame Area for the 82586
*
* input the unit number to build the RFA for
* access the softc for memory address
* output an initialized RFA, ready for packet receiption
* the following queue pointers in the softc structure are
* also initialize
* sc->rfd_head sc->rfd_tail
* sc->rbd_head sc->rbd_tail
* defines RFA_START the starting offset of the RFA
* RFA_SIZE size of the RFA area
* RB_SIZE size of the receive buffer, this must
* be even and should be greater than the
* minumum packet size and less than the
* maximum packet size
*/
void
ixinit_rfa(int unit) {
ix_softc_t *sc = &ix_softc[unit];
rfd_t *rfd;
rbd_t *rbd;
caddr_t rb;
int i,
complete_frame_size,
how_many_frames;
DEBUGBEGIN(DEBUGINIT_RFA)
DEBUGDO(printf("\nix%d: ixinit_rfa\n", unit);)
DEBUGEND
complete_frame_size = sizeof(rfd_t) + sizeof(rbd_t) + RB_SIZE;
how_many_frames = RFA_SIZE / complete_frame_size;
/* build the list of rfd's, rbd's and rb's */
rfd = (rfd_t *)(sc->maddr + RFA_START);
rbd = (rbd_t *)(sc->maddr +
RFA_START +
(how_many_frames * sizeof(rfd_t)));
rb = sc->maddr + RFA_START +
(how_many_frames * (sizeof(rfd_t) + sizeof(rbd_t)));
sc->rfd_head = rfd;
sc->rbd_head = rbd;
for (i = 0; i < how_many_frames; i++, rfd++, rbd++, rb += RB_SIZE) {
rfd->status = 0;
rfd->command = 0;
rfd->next = KVTOBOARD(rfd) + sizeof(rfd_t);
rfd->rbd_offset = INTEL586NULL;
/* ZZZ could bzero this, but just leave a note for now */
/* ZZZ bzero(rfd->destination); */
/* ZZZ bzero(rfd->source); */
rfd->length = 0;
rbd->act_count = 0;
rbd->next = KVTOBOARD(rbd) + sizeof(rbd_t);
rbd->buffer = KVTOBOARD(rb);
rbd->size = RB_SIZE;
/*
* handle the boundary conditions here. for the zeroth
* rfd we must set the rbd_offset to point at the zeroth
* rbd. for the last rfd and rbd we need to close the
* list into a ring and set the end of list bits.
*/
if (i == 0) {
rfd->rbd_offset = KVTOBOARD(rbd);
}
if (i == how_many_frames - 1) {
rfd->command = RFD_CMD_EL | RFD_CMD_SUSP;
rfd->next = KVTOBOARD(sc->rfd_head);
rbd->next = KVTOBOARD(sc->rbd_head);
rbd->size = RBD_SIZE_EL | RB_SIZE;
}
}
sc->rfd_tail = (--rfd);
sc->rbd_tail = (--rbd);
#ifdef IXDEBUG
DEBUGBEGIN(DEBUGINIT_RFA)
rfd = (rfd_t *)(sc->maddr + RFA_START);
rbd = (rbd_t *)(sc->maddr +
RFA_START +
(how_many_frames * sizeof(rfd_t)));
rb = sc->maddr + RFA_START +
(how_many_frames * (sizeof(rfd_t) + sizeof(rbd_t)));
printf(" complete_frame_size = %d\n", complete_frame_size);
printf(" how_many_frames = %d\n", how_many_frames);
printf(" rfd_head = %lx\t\trfd_tail = %lx\n",
kvtop(sc->rfd_head), kvtop(sc->rfd_tail));
printf(" rbd_head = %lx\t\trbd_tail = %lx\n",
kvtop(sc->rbd_head), kvtop(sc->rbd_tail));
for (i = 0; i < how_many_frames; i++, rfd++, rbd++, rb += RB_SIZE) {
printf(" %d:\trfd = %lx\t\trbd = %lx\t\trb = %lx\n",
i, kvtop(rfd), kvtop(rbd), kvtop(rb));
printf("\trfd->command = %x\n", rfd->command);
printf("\trfd->next = %x\trfd->rbd_offset = %x\n",
rfd->next, rfd->rbd_offset);
printf("\trbd->next = %x\trbd->size = %x",
rbd->next, rbd->size);
printf("\trbd->buffer = %lx\n\n",
rbd->buffer);
}
DEBUGEND
#endif /* IXDEBUG */
/*
* ZZZ need to add sanity check to see if last rb runs into
* the stuff after it in memory, this should not be possible
* but if someone screws up with the defines it can happen
*/
DEBUGBEGIN(DEBUGINIT_RFA)
DEBUGDO(printf (" next rb would be at %lx\n", kvtop(rb));)
DEBUGDO(printf("ix%d: ixinit_rfa exit\n", unit);)
DEBUGEND
}
/*
* ixinit_tfa(int unit)
*
* This routine initializes the Transmit Frame Area for the 82586
*
* input the unit number to build the TFA for
* access the softc for memory address
* output an initialized TFA, ready for packet transmission
* the following queue pointers in the softc structure are
* also initialize
* sc->cb_head sc->cb_tail
* sc->tbd_head sc->tbd_tail
* defines TB_COUNT home many transmit buffers to create
* TB_SIZE size of the tranmit buffer, this must
* be even and should be greater than the
* minumum packet size and less than the
* maximum packet size
* TFA_START the starting offset of the TFA
*/
void
ixinit_tfa(int unit) {
ix_softc_t *sc = &ix_softc[unit];
cb_transmit_t *cb;
tbd_t *tbd;
caddr_t tb;
int i;
DEBUGBEGIN(DEBUGINIT_TFA)
DEBUGDO(printf("\nix%d: ixinit_tfa\n", unit);)
DEBUGEND
/* build the list of cb's, tbd's and tb's */
cb = (cb_transmit_t *)(sc->maddr + TFA_START);
tbd = (tbd_t *)(sc->maddr +
TFA_START +
(TB_COUNT * sizeof(cb_transmit_t)));
tb = sc->maddr + TFA_START +
(TB_COUNT * (sizeof(cb_transmit_t) + sizeof(tbd_t)));
sc->cb_head = (cb_t *)cb;
sc->tbd_head = tbd;
for (i = 0; i < TB_COUNT; i++, cb++, tbd++, tb += TB_SIZE) {
cb->common.status = 0;
cb->common.command = CB_CMD_NOP;
cb->common.next = KVTOBOARD(cb) + sizeof(cb_transmit_t);
cb->tbd_offset = KVTOBOARD(tbd);
/* ZZZ could bzero this, but just leave a note for now */
/* ZZZ bzero(cb->destination); */
cb->length = 0;
tbd->act_count = 0;
tbd->act_count = TBD_STAT_EOF;
tbd->next = KVTOBOARD(tbd) + sizeof(tbd_t);
tbd->buffer = KVTOBOARD(tb);
/*
* handle the boundary conditions here.
*/
if (i == TB_COUNT - 1) {
cb->common.command = CB_CMD_EL | CB_CMD_NOP;
cb->common.next = INTEL586NULL; /*RRR KVTOBOARD(sc->cb_head);*/
tbd->next = INTEL586NULL; /*RRR KVTOBOARD(sc->tbd_head);*/
}
}
sc->cb_tail = (cb_t *)(--cb);
sc->tbd_tail = (--tbd);
#ifdef IXDEBUG
DEBUGBEGIN(DEBUGINIT_TFA)
cb = (cb_transmit_t *)(sc->maddr + TFA_START);
tbd = (tbd_t *)(sc->maddr +
TFA_START +
(TB_COUNT * sizeof(cb_transmit_t)));
tb = sc->maddr + TFA_START +
(TB_COUNT * (sizeof(cb_transmit_t) + sizeof(tbd_t)));
printf(" TB_COUNT = %d\n", TB_COUNT);
printf(" cb_head = %lx\t\tcb_tail = %lx\n",
kvtop(sc->cb_head), kvtop(sc->cb_tail));
printf(" tbd_head = %lx\t\ttbd_tail = %lx\n",
kvtop(sc->tbd_head), kvtop(sc->tbd_tail));
for (i = 0; i < TB_COUNT; i++, cb++, tbd++, tb += TB_SIZE) {
printf(" %d:\tcb = %lx\t\ttbd = %lx\t\ttb = %lx\n",
i, kvtop(cb), kvtop(tbd), kvtop(tb));
printf("\tcb->common.command = %x\n", cb->common.command);
printf("\tcb->common.next = %x\tcb->tbd_offset = %x\n",
cb->common.next, cb->tbd_offset);
printf("\ttbd->act_count = %x", tbd->act_count);
printf("\ttbd->next = %x", tbd->next);
printf("\ttbd->buffer = %lx\n\n",
tbd->buffer);
}
DEBUGEND
#endif /* IXDEBUG */
/*
* ZZZ need to add sanity check to see if last tb runs into
* the stuff after it in memory, this should not be possible
* but if someone screws up with the defines it can happen
*/
DEBUGBEGIN(DEBUGINIT_TFA)
DEBUGDO(printf (" next tb would be at %lx\n", kvtop(tb));)
DEBUGDO(printf("ix%d: ixinit_tfa exit\n", unit);)
DEBUGEND
}
void
ixintr(int unit) {
ix_softc_t *sc = &ix_softc[unit];
struct ifnet *ifp = &sc->arpcom.ac_if;
scb_t *scb = (scb_t *)(sc->maddr + SCB_ADDR);
int check_queue; /* flag to tell us to check the queue */
u_short status;
DEBUGBEGIN(DEBUGINTR)
DEBUGDO(printf("ixintr: ");)
DEBUGEND
if ((sc->flags & IXF_INITED) == 0) {
printf ("\n ixintr without being inited!!\n"); /* ZZZ */
ixinterrupt_disable(unit);
goto ixintr_exit;
}
if (ifp->if_flags & IFF_RUNNING == 0) {
printf("\n ixintr when device not running!!\n"); /* ZZZ */
ixinterrupt_disable(unit);
goto ixintr_exit;
}
/* The sequence, disable ints, status=ack must be done
* as quick as possible to avoid missing things */
ixinterrupt_disable(unit);
status = ixacknowledge(unit);
check_queue = 0;
while ((status & SCB_STAT_MASK) != 0) {
if (status & SCB_STAT_FR) {
ixintr_fr(unit);
}
if (status & SCB_STAT_CX) {
ixintr_cx(unit);
check_queue++;
}
if (status & SCB_STAT_CNA) {
DEBUGBEGIN(DEBUGINTR)
DEBUGDO(printf("cna:");)
DEBUGEND
}
if ((status & SCB_STAT_RNR) ||
((status & SCB_RUS_MASK) == SCB_RUS_NRSC)) {
DEBUGBEGIN(DEBUGINTR)
printf("RNR:"); /* ZZZ this means trouble */
DEBUGEND
IXCOUNTER(ifp->if_rnr++;)
ixinit_rfa(unit);
scb->status = SCB_STAT_NULL;
scb->command = SCB_RUC_START;
scb->rfa_offset = RFA_START;
ixchannel_attention(unit);
}
if (scb->status & SCB_STAT_MASK) {
status = ixacknowledge(unit);
} else {
status = 0;
}
}
ixinterrupt_enable(unit);
if (check_queue && ifp->if_snd.ifq_head != 0) {
ixstart(ifp); /* we have stuff on the queue */
}
ixintr_exit:
DEBUGBEGIN(DEBUGINTR)
DEBUGDO(printf(" ixintr exited\n");)
DEBUGEND
}
static inline void
ixintr_cx(int unit) {
ix_softc_t *sc = &ix_softc[unit];
struct ifnet *ifp = &sc->arpcom.ac_if;
cb_t *cb;
DEBUGBEGIN(DEBUGINTR_CX)
DEBUGDO(printf("cx:");)
DEBUGEND
cb = sc->cb_head;
do {
if (cb->status & CB_BUSY) {
IXCOUNTER(ifp->if_busy++;)
printf("ix.cx.busy"); /* This should never occur */
}
if (cb->status & CB_COMPLETE) {
IXCOUNTER(ifp->if_complete++;)
switch(cb->command & CB_CMD_MASK) {
case CB_CMD_NOP: { break; }
case CB_CMD_IAS: { break; }
case CB_CMD_CONF: { break; }
case CB_CMD_MCAS: { break; }
case CB_CMD_TRANSMIT: {
if (cb->status & CB_OK) {
ifp->if_opackets++;
IXCOUNTER(ifp->if_ok++;)
} else {
if (cb->status & CB_ABORT) {
IXCOUNTER(ifp->if_abort++;)
printf("ix.cx.abort");
}
if (cb->status & CB_LATECOLL) {
IXCOUNTER(ifp->if_latecoll++;)
printf("ix.cx.latecoll");
}
if (cb->status & CB_NOCS) {
IXCOUNTER(ifp->if_nocs++;)
printf("ix.cx.nocs");
}
if (cb->status & CB_NOCTS) {
IXCOUNTER(ifp->if_nocts++;)
printf("ix.cx.nocts");
}
if (cb->status & CB_DMAUNDER) {
IXCOUNTER(ifp->if_dmaunder++;)
printf("ix.cx.dmaunder");
}
if (cb->status & CB_DEFER) {
IXCOUNTER(ifp->if_defer++;)
printf("ix.cx.defer");
}
if (cb->status & CB_HEARTBEAT) {
IXCOUNTER(ifp->if_heartbeat++;)
printf("ix.cx.heartbeat");
}
if (cb->status & CB_EXCESSCOLL) {
IXCOUNTER(ifp->if_excesscoll++;)
printf("ix.cx.excesscoll");
}
ifp->if_oerrors++;
}
ifp->if_collisions += cb->status & CB_COLLISIONS;
ifp->if_timer = 0; /* clear watchdog timeout */
break;
}
case CB_CMD_TDR: { break; }
case CB_CMD_DUMP: { break; }
case CB_CMD_DIAGNOSE: { break; }
default: { break; }
}
ixintr_cx_free(unit, cb);
} else {
}
if (cb->next == INTEL586NULL) {
break;
} else {
cb = (cb_t *)BOARDTOKV(cb->next);
}
}
while (1);
/*
* clear the IFF_OACTIVE flag because the CU should now be
* idle, this only holds true as long as the last CB is the
* only one with the CB_CMD_INT bit set. If the start routine
* violates this rule this code well have to change.
*/
ifp->if_flags &= ~IFF_OACTIVE;
}
static inline void
ixintr_cx_free(int unit, cb_t *cb) {
DEBUGBEGIN(DEBUGINTR_CX)
DEBUGDO(ix_softc_t *sc = &ix_softc[unit];)
DEBUGDO(printf("cb=%x:cb->status=%x:", KVTOBOARD(cb), cb->status);)
DEBUGEND
/*1*/ cb->command = CB_CMD_EL | CB_CMD_NOP;
/*2*/ cb->status = 0;
}
static inline void
ixintr_fr(int unit) {
ix_softc_t *sc = &ix_softc[unit];
DEBUGBEGIN(DEBUGINTR_FR)
DEBUGDO(printf("fr:");)
DEBUGEND
/* find each frame in the rfa and copy it up, then free it */
while ((sc->rfd_head->status & (RFD_COMPLETE | RFD_BUSY)) == RFD_COMPLETE) {
ixintr_fr_copy(unit, sc->rfd_head);
ixintr_fr_free(unit, sc->rfd_head);
}
}
static inline void
ixintr_fr_copy(int unit, rfd_t *rfd) {
ix_softc_t *sc = &ix_softc[unit];
struct ifnet *ifp = &sc->arpcom.ac_if;
rbd_t *rbd;
caddr_t rb;
struct mbuf *m0, *m;
struct ether_header *eh;
int length,
bytesleft;
rbd = (rbd_t *)(sc->maddr + rfd->rbd_offset);
rb = (caddr_t)(sc->maddr + rbd->buffer);
DEBUGBEGIN(DEBUGINTR_FR)
DEBUGDO(int i;)
DEBUGDO(printf("rfd=%x:", KVTOBOARD(rfd));)
DEBUGDO(printf("rfd->status=%x:", rfd->status);)
DEBUGDO(printf("rbd->act_count=%x:", rbd->act_count);)
DEBUGDO(printf("data=");)
DEBUGDO(for (i = 0; i < 16; i ++) printf ("%02x", rb[i] & 0xFF);)
DEBUGDO(printf(":");)
DEBUGEND
/* trickery here, eh points right at memory on
* the board. eh is only used by ether_input,
* it is not passed to the upper layer */
eh = (struct ether_header *)rb;
/* here we go, lets build an mbuf chain up to hold all this */
MGETHDR(m, M_DONTWAIT, MT_DATA);
if (m == 0) {
printf ("MGETHDR:"); /* ZZZ need to add drop counters */
return;
}
m0 = m;
length = rbd->act_count & RBD_STAT_SIZE;
bytesleft = length - sizeof(struct ether_header);
rb += sizeof(struct ether_header);
m->m_pkthdr.rcvif = ifp;
m->m_pkthdr.len = bytesleft;
m->m_len = MHLEN;
while (bytesleft > 0) {
if (bytesleft > MINCLSIZE) {
MCLGET(m, M_DONTWAIT);
if (m->m_flags & M_EXT) {
m->m_len = MCLBYTES;
} else {
printf ("MCLGET:");
m_freem(m0); /* ZZZ need to add drop counters */
return;
}
}
m->m_len = min(m->m_len, bytesleft);
bcopy(rb, mtod(m, caddr_t), m->m_len);
rb += m->m_len;
bytesleft -= m->m_len;
if (bytesleft > 0) {
MGET(m->m_next, M_DONTWAIT, MT_DATA);
if (m->m_next == 0) {
printf ("MGET");
m_freem(m0); /* ZZZ need to add drop counters */
return;
}
m = m->m_next;
m->m_len = MLEN;
}
}
ether_input(ifp, eh, m0);
ifp->if_ipackets++;
return;
}
static inline void
ixintr_fr_free(int unit, rfd_t *rfd) {
ix_softc_t *sc = &ix_softc[unit];
rbd_t *rbd;
rbd = (rbd_t *)(sc->maddr + rfd->rbd_offset);
/* XXX this still needs work, does not handle chained rbd's */
/*1*/ rbd->act_count = 0;
/*2*/ rbd->size = RBD_SIZE_EL | RB_SIZE;
/*3*/ sc->rbd_tail->size = RB_SIZE;
/*4*/ sc->rbd_tail = rbd;
/* Free the rfd buy putting it back on the rfd queue */
/*1*/ rfd->command = RFD_CMD_EL | RFD_CMD_SUSP;
/*2*/ rfd->status = 0;
/*3*/ rfd->rbd_offset = INTEL586NULL;
/*4*/ sc->rfd_head = (rfd_t *)BOARDTOKV(rfd->next);
/*5*/ sc->rfd_tail->command &= ~(RFD_CMD_EL | RFD_CMD_SUSP);
/*6*/ sc->rfd_tail = rfd;
}
/* Psuedo code:
* Do consistency check:
* IFF_UP should be set.
* IFF_RUNNING should be set.
* IFF_OACTIVE should be clear.
* ifp->snd.ifq_head should point to an MBUF
* I82586 CU should be in the idle state.
* All cb's should have CUC = NOP.
* The real work:
* while there are packets to send & free cb's do:
* build a cb, tbd, and tb
* copy the MBUF chain to a tb
* setup the scb for a start CU
* start the CU
* set IFF_OACTIVE
* set ifp->if_timer for watchdog timeout
* Exit:
*/
void
ixstart(struct ifnet *ifp) {
int unit = ifp->if_unit;
ix_softc_t *sc = &ix_softc[unit];
scb_t *scb = (scb_t *)BOARDTOKV(SCB_ADDR);
cb_t *cb = sc->cb_head;
tbd_t *tbd;
caddr_t tb;
struct mbuf *m, *m_temp;
u_short length;
IXCOUNTER(int queued;)
DEBUGBEGIN(DEBUGSTART)
DEBUGDO(printf("ixstart:");)
DEBUGEND
/* check that if is up and running */
if ((ifp->if_flags & (IFF_UP | IFF_RUNNING)) != (IFF_UP | IFF_RUNNING)) {
goto ixstart_exit;
}
/* check to see that we are not already active */
if ((ifp->if_flags & IFF_OACTIVE) == IFF_OACTIVE) {
goto ixstart_exit;
}
/* check that there are packets to send */
if (ifp->if_snd.ifq_head == 0) {
goto ixstart_exit;
}
/* check that the command unit is idle */
if ((scb->status & SCB_CUS_MASK) != SCB_CUS_IDLE) {
goto ixstart_exit;
}
/* check that all cb's on the list are free */
#ifdef THISDONTDONOTHING
cb = sc->cb_head;
IXCOUNTER(ifp->if_could_queue = 0;)
do {
/* XXX this does nothing right now! */
DEBUGBEGIN(DEBUGSTART)
DEBUGDO(printf("chk_cb=%x:", KVTOBOARD(cb));)
DEBUGEND
IXCOUNTER(ifp->if_could_queue++;)
if (cb->next == INTEL586NULL) {
break;
} else {
cb = (cb_t *)BOARDTOKV(cb->next);
}
}
while (1);
#endif /* THISDONTDONOTHING */
/* build as many cb's as we can */
IXCOUNTER(queued = 0;)
cb = sc->cb_head;
do {
cb->status = 0;
cb->command = CB_CMD_TRANSMIT;
tbd = (tbd_t *)BOARDTOKV(((cb_transmit_t *)cb)->tbd_offset);
tb = (caddr_t)BOARDTOKV(tbd->buffer);
DEBUGBEGIN(DEBUGSTART)
DEBUGDO(printf("cb=%x:", KVTOBOARD(cb));)
DEBUGDO(printf("tbd=%x:", KVTOBOARD(tbd));)
DEBUGDO(printf("tb=%x:", KVTOBOARD(tb));)
DEBUGEND
IF_DEQUEUE(&ifp->if_snd, m);
length = 0;
for (m_temp = m; m_temp != 0; m_temp = m_temp->m_next) {
bcopy(mtod(m_temp, caddr_t), tb, m_temp->m_len);
tb += m_temp->m_len;
length += m_temp->m_len;
}
m_freem(m);
if (length < ETHER_MIN_LENGTH) length = ETHER_MIN_LENGTH;
#ifdef DIAGNOSTIC
if (length > ETHER_MAX_LENGTH) {
/* XXX
* This should never ever happen, if it does
* we probable screwed up all sorts of board data
* in the above bcopy's and should probably shut
* down, but for now just issue a warning that
* something is real wrong
*/
printf("ix%d: ixstart: Packet length=%d > MTU=%d\n",
unit, length, ETHER_MAX_LENGTH);
}
#endif /* DIAGNOSTIC */
tbd->act_count = TBD_STAT_EOF | length;
IXCOUNTER(queued++;)
/* check to see if we have used the last cb */
if (cb->next == INTEL586NULL) {
IXCOUNTER(ifp->if_filled_queue++;)
break;
} else {
cb = (cb_t *)BOARDTOKV(cb->next);
}
} while (ifp->if_snd.ifq_head != 0);
IXCOUNTER(ifp->if_high_queue = max(ifp->if_high_queue, queued);)
/* set the end of list and interrupt bits in the last cb */
cb->command |= (CB_CMD_EL | CB_CMD_INT);
/* build the scb */
scb->status = SCB_STAT_NULL;
scb->command = SCB_CUC_START;
scb->cbl_offset = KVTOBOARD(sc->cb_head);/* This should not be needed */
/* start the cu */
ixchannel_attention(unit);
/* mark the interface as having output active */
ifp->if_flags |= IFF_OACTIVE;
/*
* set the watchdog timer so that if the board fails to interrupt
* we will go clean up
*/
ifp->if_timer = 2;
ixstart_exit:
DEBUGBEGIN(DEBUGSTART)
DEBUGDO(printf("ixstart exited\n");)
DEBUGEND
return;
}
int
ixstop(struct ifnet *ifp) {
int unit = ifp->if_unit;
ix_softc_t *sc = &ix_softc[unit];
DEBUGBEGIN(DEBUGSTOP)
DEBUGDO(printf("ixstop:");)
DEBUGEND
/* XXX Need to find out what spl we are at, and maybe add splx */
ifp->if_flags &= ~IFF_RUNNING;
ixinterrupt_disable(unit);
/* force the 82586 reset pin high */
outb(sc->iobase + ee_ctrl, I586_RESET);
sc->kdc.kdc_state = DC_IDLE;
DEBUGBEGIN(DEBUGSTOP)
DEBUGDO(printf("ixstop exiting\n");)
DEBUGEND
return(0);
}
/*
* I can't find any calls to if_done, it may be deprecated, but I left
* it here until I find out. rwgrimes 1993/01/15
*/
int
ixdone(struct ifnet *ifp) {
DEBUGBEGIN(DEBUGDONE)
DEBUGDO(printf("ixdone:");)
DEBUGEND
DEBUGBEGIN(DEBUGDONE)
DEBUGDO(printf("ixdone exited\n");)
DEBUGEND
return(0);
}
int
ixioctl(struct ifnet *ifp, int cmd, caddr_t data) {
int unit = ifp->if_unit;
int status = 0;
int s;
DEBUGBEGIN(DEBUGIOCTL)
DEBUGDO(printf("ixioctl:");)
DEBUGEND
s = splimp();
switch(cmd) {
case SIOCSIFADDR: {
struct ifaddr *ifa = (struct ifaddr *)data;
if (ifp->if_flags & IFF_RUNNING) ixstop(ifp);
ifp->if_flags |= IFF_UP;
ixinit(unit);
switch(ifa->ifa_addr->sa_family) {
#ifdef INET
case AF_INET: {
arp_ifinit((struct arpcom *)ifp, ifa);
break;
}
#endif /* INET */
#ifdef IPX
case AF_IPX: {
/*ZZZ*/printf("Address family IPX not supported by ixioctl\n");
break;
}
#endif /* IPX */
#ifdef NS
case AF_NS: {
/*ZZZ*/printf("Address family NS not supported by ixioctl\n");
break;
}
#endif /* NS */
default: {
DEBUGBEGIN(DEBUGIOCTL)
DEBUGDO(printf("Unknow Address Family in ixioctl\n");)
DEBUGEND
status = EINVAL;
break;
}
}
break;
}
case SIOCSIFFLAGS: {
if (((ifp->if_flags & IFF_UP) == 0) &&
(ifp->if_flags & IFF_RUNNING)) {
ixstop(ifp);
}
else if ((ifp->if_flags & IFF_UP) &&
((ifp->if_flags & IFF_RUNNING) == 0)) {
ixinit(unit);
}
break;
}
default: {
DEBUGBEGIN(DEBUGIOCTL)
DEBUGDO(printf("Unknown cmd in ixioctl\n");)
DEBUGEND
status = EINVAL;
break;
}
}
splx(s);
DEBUGBEGIN(DEBUGIOCTL)
DEBUGDO(printf("ixioctl exit\n");)
DEBUGEND
return(status);
}
void
ixreset(int unit) {
ix_softc_t *sc = &ix_softc[unit];
struct ifnet *ifp = &sc->arpcom.ac_if;
int s;
s = splimp();
DEBUGBEGIN(DEBUGRESET)
DEBUGDO(printf("ixreset:");)
DEBUGEND
ixstop(ifp);
ixinit(unit);
DEBUGBEGIN(DEBUGRESET)
DEBUGDO(printf("ixreset exit\n");)
DEBUGEND
(void) splx(s);
return;
}
/*
* The ixwatchdog routine gets called if the transmitter failed to interrupt
* within ifp->if_timer XXXseconds. The interrupt service routine must reset
* ifp->if_timer to 0 after an transmitter interrupt occurs to stop the
* watchdog from happening.
*/
void
ixwatchdog(int unit) {
ix_softc_t *sc = &ix_softc[unit];
log(LOG_ERR, "ix%d: device timeout\n", unit);
sc->arpcom.ac_if.if_oerrors++;
ixreset(unit);
return;
}
u_short
ixeeprom_read(int unit, int location) {
int eeprom_control,
data;
eeprom_control = inb(ix_softc[unit].iobase + ee_ctrl);
eeprom_control &= 0xB2; /* XXX fix 0xB2 */
eeprom_control |= EECS;
outb(ix_softc[unit].iobase + ee_ctrl, eeprom_control);
ixeeprom_outbits(unit, eeprom_read_op, eeprom_opsize1);
ixeeprom_outbits(unit, location, eeprom_addr_size);
data = ixeeprom_inbits(unit);
eeprom_control = inb(ix_softc[unit].iobase + ee_ctrl);
eeprom_control &= ~(GA_RESET | EEDI | EECS);
outb(ix_softc[unit].iobase + ee_ctrl, eeprom_control);
ixeeprom_clock(unit, 1);
ixeeprom_clock(unit, 0);
return(data);
}
void
ixeeprom_outbits(int unit, int data, int count) {
int eeprom_control,
i;
eeprom_control = inb(ix_softc[unit].iobase + ee_ctrl);
eeprom_control &= ~GA_RESET;
for(i=count-1; i>=0; i--) {
eeprom_control &= ~EEDI;
if (data & (1 << i)) {
eeprom_control |= EEDI;
}
outb(ix_softc[unit].iobase + ee_ctrl, eeprom_control);
DELAY(1); /* eeprom data must be setup for 0.4 uSec */
ixeeprom_clock(unit, 1);
ixeeprom_clock(unit, 0);
}
eeprom_control &= ~EEDI;
outb(ix_softc[unit].iobase + ee_ctrl, eeprom_control);
DELAY(1); /* eeprom data must be held for 0.4 uSec */
}
int
ixeeprom_inbits(int unit) {
int eeprom_control,
data,
i;
eeprom_control = inb(ix_softc[unit].iobase + ee_ctrl);
eeprom_control &= ~GA_RESET;
for(data=0, i=0; i<16; i++) {
data = data << 1;
ixeeprom_clock(unit, 1);
eeprom_control = inb(ix_softc[unit].iobase + ee_ctrl);
if (eeprom_control & EEDO) {
data |= 1;
}
ixeeprom_clock(unit, 0);
}
return(data);
}
void
ixeeprom_clock(int unit, int state) {
int eeprom_control;
eeprom_control = inb(ix_softc[unit].iobase + ee_ctrl);
eeprom_control &= ~(GA_RESET | EESK);
if (state) {
eeprom_control = eeprom_control | EESK;
}
outb(ix_softc[unit].iobase + ee_ctrl, eeprom_control);
DELAY(9); /* EESK must be stable for 8.38 uSec */
}
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