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freebsd/sys/pci/if_vx.c
Bruce Evans 6ea3e9d839 Completed function declarations and/or added prototypes and/or added 
#includes to get prototypes.

pci now uses a different interrupt handler type for interrupts that it
dispatches and the isa interrupt handler type for the interrupts that
it handles.
1995-12-16 00:27:59 +00:00

1143 lines
28 KiB
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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.
*
*/
/*
* Created from if_ep.c driver by Fred Gray (fgray@rice.edu) to support
* the 3c590 family.
*/
/*
* Modified from the FreeBSD 1.1.5.1 version by:
* Andres Vega Garcia
* INRIA - Sophia Antipolis, France
* avega@sophia.inria.fr
*/
/*
* 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 "vx.h"
#if NVX > 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 <pci/pcivar.h>
#include <pci/if_vxreg.h>
static int eeprom_rdy __P((int unit));
static int get_e __P((int unit, int offset));
static int vxioctl __P((struct ifnet * ifp, int, caddr_t));
static void vxmbuffill __P((caddr_t, int));
static void vxmbufempty __P((struct vx_softc *));
static void vxinit __P((int));
static void vxintr __P((int));
static void vxread __P((struct vx_softc *));
static void vxreset __P((int));
static void vxstart __P((struct ifnet *));
static void vxstop __P((int));
static void vxwatchdog __P((struct ifnet *));
static struct vx_softc vx_softc[NVX];
#define vx_ftst(f) (sc->stat&(f))
#define vx_fset(f) (sc->stat|=(f))
#define vx_frst(f) (sc->stat&=~(f))
static int
eeprom_rdy(unit)
int unit;
{
struct vx_softc *sc = &vx_softc[unit];
int i;
for (i = 0; is_eeprom_busy(BASE) && i < MAX_EEPROMBUSY; i++);
if (i >= MAX_EEPROMBUSY) {
printf("vx%d: eeprom failed to come ready.\n", unit);
return (0);
}
return (1);
}
/*
* get_e: gets a 16 bits word from the EEPROM. we must have set the window
* before
*/
static int
get_e(unit, offset)
int unit;
int offset;
{
struct vx_softc *sc = &vx_softc[unit];
if (!eeprom_rdy(unit))
return (0xffff);
outw(BASE + VX_W0_EEPROM_COMMAND, EEPROM_CMD_RD | offset);
if (!eeprom_rdy(unit))
return (0xffff);
return (inw(BASE + VX_W0_EEPROM_DATA));
}
static int
vx_pci_shutdown(
struct kern_devconf * const kdc,
int force)
{
vxreset(kdc->kdc_unit);
dev_detach(kdc);
return 0;
}
static char*
vx_pci_probe(
pcici_t config_id,
pcidi_t device_id)
{
if(device_id == 0x590010b7ul)
return "3Com 3c590 EtherLink III PCI";
return NULL;
}
static char *vx_conn_type[] = {"UTP", "AUI", "???", "BNC"};
static void
vx_pci_attach(
pcici_t config_id,
int unit)
{
struct vx_softc *sc;
struct ifnet *ifp;
u_short i, j, *p;
struct ifaddr *ifa;
struct sockaddr_dl *sdl;
if (unit >= NVX) {
printf("vx%d: not configured; kernel is built for only %d device%s.\n",
unit, NVX, NVX == 1 ? "" : "s");
return;
}
sc = &vx_softc[unit];
ifp = &sc->arpcom.ac_if;
sc->vx_io_addr = pci_conf_read(config_id, 0x10) & 0xfffffff0;
outw(VX_COMMAND, GLOBAL_RESET);
DELAY(1000);
sc->vx_connectors = 0;
i = pci_conf_read(config_id, 0x48);
j = inw(BASE + VX_W3_INTERNAL_CFG) >> INTERNAL_CONNECTOR_BITS;
if (i & RS_AUI) {
printf("aui");
sc->vx_connectors |= AUI;
}
if (i & RS_BNC) {
if (sc->vx_connectors)
printf("/");
printf("bnc");
sc->vx_connectors |= BNC;
}
if (i & RS_UTP) {
if (sc->vx_connectors)
printf("/");
printf("utp");
sc->vx_connectors |= UTP;
}
if (!(sc->vx_connectors & 7))
printf("no connectors!");
else
printf("[*%s*]", vx_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(unit, i));
GO_WINDOW(2);
outw(BASE + VX_W2_ADDR_0 + (i * 2), ntohs(p[i]));
}
printf(" address %s\n", ether_sprintf(sc->arpcom.ac_enaddr));
/*
* Check for receive overrun anomaly in the first revision of the
* adapters.
*/
if(!(get_e(unit, EEPROM_SOFT_INFO_2) & NO_RX_OVN_ANOMALY)) {
printf("Warning! Defective early revision adapter!\n");
}
ifp->if_unit = unit;
ifp->if_name = "vx";
ifp->if_mtu = ETHERMTU;
ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX /*| IFF_NOTRAILERS*/;
ifp->if_output = ether_output;
ifp->if_start = vxstart;
ifp->if_ioctl = vxioctl;
ifp->if_watchdog = vxwatchdog;
if_attach(ifp);
/*
* 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 VX_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
vx_fset(F_RX_FIRST);
sc->top = sc->mcur = 0;
#if NBPFILTER > 0
bpfattach(&sc->bpf, ifp, DLT_EN10MB, sizeof(struct ether_header));
#endif
pci_map_int(config_id, (void *) vxintr, (void *) unit, &net_imask);
}
static u_long vx_pci_count;
static struct pci_device vxdevice = {
"vx",
vx_pci_probe,
vx_pci_attach,
&vx_pci_count,
vx_pci_shutdown,
};
DATA_SET (pcidevice_set, vxdevice);
/*
* The order in here seems important. Otherwise we may not receive
* interrupts. ?!
*/
static void
vxinit(unit)
int unit;
{
register struct vx_softc *sc = &vx_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 + VX_STATUS) & S_COMMAND_IN_PROGRESS);
GO_WINDOW(0);
outw(BASE + VX_COMMAND, STOP_TRANSCEIVER);
GO_WINDOW(4);
outw(BASE + VX_W4_MEDIA_TYPE, DISABLE_UTP);
GO_WINDOW(2);
/* Reload the ether_addr. */
for (i = 0; i < 6; i++)
outb(BASE + VX_W2_ADDR_0 + i, sc->arpcom.ac_enaddr[i]);
outw(BASE + VX_COMMAND, RX_RESET);
outw(BASE + VX_COMMAND, TX_RESET);
/* Window 1 is operating window */
GO_WINDOW(1);
for (i = 0; i < 31; i++)
inb(BASE + VX_W1_TX_STATUS);
/* get rid of stray intr's */
outw(BASE + VX_COMMAND, ACK_INTR | 0xff);
outw(BASE + VX_COMMAND, SET_RD_0_MASK | S_5_INTS);
outw(BASE + VX_COMMAND, SET_INTR_MASK | S_5_INTS);
if(ifp->if_flags & IFF_PROMISC)
outw(BASE + VX_COMMAND, SET_RX_FILTER | FIL_INDIVIDUAL |
FIL_GROUP | FIL_BRDCST | FIL_ALL);
else
outw(BASE + VX_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->vx_connectors & AUI) {
/* nothing */
} else if(ifp->if_flags & IFF_LINK1 && sc->vx_connectors & BNC) {
outw(BASE + VX_COMMAND, START_TRANSCEIVER);
DELAY(1000);
} else if(ifp->if_flags & IFF_LINK2 && sc->vx_connectors & UTP) {
GO_WINDOW(4);
outw(BASE + VX_W4_MEDIA_TYPE, ENABLE_UTP);
GO_WINDOW(1);
} else {
GO_WINDOW(0);
j = inw(BASE + VX_W3_INTERNAL_CFG) >> INTERNAL_CONNECTOR_BITS;
GO_WINDOW(1);
switch(j) {
case ACF_CONNECTOR_UTP:
if(sc->vx_connectors & UTP) {
GO_WINDOW(4);
outw(BASE + VX_W4_MEDIA_TYPE, ENABLE_UTP);
GO_WINDOW(1);
}
break;
case ACF_CONNECTOR_BNC:
if(sc->vx_connectors & BNC) {
outw(BASE + VX_COMMAND, START_TRANSCEIVER);
DELAY(1000);
}
break;
case ACF_CONNECTOR_AUI:
/* nothing to do */
break;
default:
printf("vx%d: strange connector type in EEPROM: assuming AUI\n",
unit);
break;
}
}
outw(BASE + VX_COMMAND, RX_ENABLE);
outw(BASE + VX_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 VX_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
vx_fset(F_RX_FIRST);
vx_frst(F_RX_TRAILER);
if (sc->top) {
m_freem(sc->top);
sc->top = sc->mcur = 0;
}
outw(BASE + VX_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 + VX_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;
vxmbuffill((caddr_t) sc, 0);
vxstart(ifp);
splx(s);
}
static const char padmap[] = {0, 3, 2, 1};
static void
vxstart(ifp)
struct ifnet *ifp;
{
register struct vx_softc *sc = &vx_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 + VX_W1_FREE_TX) < len + pad + 4) {
/* no room in FIFO */
outw(BASE + VX_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 + VX_W1_TX_PIO_WR_1, len);
outw(BASE + VX_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 + VX_COMMAND, SET_TX_START_THRESH | len);
#endif
for (top = m; m != 0; m = m->m_next)
if(vx_ftst(F_ACCESS_32_BITS)) {
outsl(BASE + VX_W1_TX_PIO_WR_1, mtod(m, caddr_t),
m->m_len / 4);
if (m->m_len & 3)
outsb(BASE + VX_W1_TX_PIO_WR_1,
mtod(m, caddr_t) + m->m_len / 4,
m->m_len & 3);
} else {
outsw(BASE + VX_W1_TX_PIO_WR_1, mtod(m, caddr_t), m->m_len / 2);
if (m->m_len & 1)
outb(BASE + VX_W1_TX_PIO_WR_1,
*(mtod(m, caddr_t) + m->m_len - 1));
}
while (pad--)
outb(BASE + VX_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 + VX_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 + VX_COMMAND, SET_TX_AVAIL_THRESH |
sc->tx_start_thresh);
}
splx(s);
return;
}
goto startagain;
}
static void
vxintr(unit)
int unit;
{
register int status;
register struct vx_softc *sc = &vx_softc[unit];
int x;
x=splbio();
outw(BASE + VX_COMMAND, SET_INTR_MASK); /* disable all Ints */
rescan:
while ((status = inw(BASE + VX_STATUS)) & S_5_INTS) {
/* first acknowledge all interrupt sources */
outw(BASE + VX_COMMAND, ACK_INTR | (status & S_MASK));
if (status & (S_RX_COMPLETE | S_RX_EARLY)) {
vxread(sc);
continue;
}
if (status & S_TX_AVAIL) {
/* we need ACK */
sc->arpcom.ac_if.if_flags &= ~IFF_OACTIVE;
GO_WINDOW(1);
inw(BASE + VX_W1_FREE_TX);
vxstart(&sc->arpcom.ac_if);
}
if (status & S_CARD_FAILURE) {
#ifdef VX_LOCAL_STATS
printf("\nvx%d:\n\tStatus: %x\n", unit, status);
GO_WINDOW(4);
printf("\tFIFO Diagnostic: %x\n", inw(BASE + VX_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("vx%d: Status: %x\n", unit, status);
#endif
vxinit(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 + VX_W1_TX_STATUS)) & TXS_COMPLETE) {
if (status & TXS_SUCCES_INTR_REQ);
else if (status & (TXS_UNDERRUN | TXS_JABBER | TXS_MAX_COLLISION)) {
outw(BASE + VX_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 VX_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 + VX_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 + VX_COMMAND, SET_TX_AVAIL_THRESH | 8);
}
}
outb(BASE + VX_W1_TX_STATUS, 0x0); /* pops up the next
* status */
} /* while */
sc->arpcom.ac_if.if_flags &= ~IFF_OACTIVE;
GO_WINDOW(1);
inw(BASE + VX_W1_FREE_TX);
vxstart(&sc->arpcom.ac_if);
} /* end TX_COMPLETE */
}
outw(BASE + VX_COMMAND, C_INTR_LATCH); /* ACK int Latch */
if ((status = inw(BASE + VX_STATUS)) & S_5_INTS)
goto rescan;
/* re-enable Ints */
outw(BASE + VX_COMMAND, SET_INTR_MASK | S_5_INTS);
splx(x);
}
static void
vxread(sc)
register struct vx_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 + VX_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 VX_LOCAL_STATS
if (vx_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 (vx_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 + VX_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 (vx_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 (vx_ftst(F_ACCESS_32_BITS)) { /* default for EISA configured cards*/
insl(BASE + VX_W1_RX_PIO_RD_1, mtod(m, caddr_t) + m->m_len,
lenthisone / 4);
m->m_len += (lenthisone & ~3);
if (lenthisone & 3)
insb(BASE + VX_W1_RX_PIO_RD_1,
mtod(m, caddr_t) + m->m_len,
lenthisone & 3);
m->m_len += (lenthisone & 3);
} else {
insw(BASE + VX_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 + VX_W1_RX_PIO_RD_1);
}
rx_fifo -= lenthisone;
}
if (vx_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 + VX_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));
vx_frst(F_RX_TRAILER);
goto all_pkt;
}
if (status & ERR_RX_INCOMPLETE) { /* we haven't received the complete
* packet */
sc->mcur = m;
#ifdef VX_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);
vx_frst(F_RX_FIRST);
if (!((status = inw(BASE + VX_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 + VX_COMMAND, SET_RX_EARLY_THRESH |
(sc->rx_early_thresh = delta));
return;
}
all_pkt:
outw(BASE + VX_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;
vx_fset(F_RX_FIRST);
vx_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;
}
vx_fset(F_RX_FIRST);
vx_frst(F_RX_TRAILER);
#ifdef VX_LOCAL_STATS
sc->rx_bpf_disc++;
#endif
while (inw(BASE + VX_STATUS) & S_COMMAND_IN_PROGRESS);
outw(BASE + VX_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])
vxmbuffill((caddr_t) sc, 0);
sc->top = 0;
while (inw(BASE + VX_STATUS) & S_COMMAND_IN_PROGRESS);
outw(BASE + VX_COMMAND, SET_RX_EARLY_THRESH | delta);
return;
out:
outw(BASE + VX_COMMAND, RX_DISCARD_TOP_PACK);
if (sc->top) {
m_freem(sc->top);
sc->top = 0;
#ifdef VX_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;
vx_fset(F_RX_FIRST);
vx_frst(F_RX_TRAILER);
while (inw(BASE + VX_STATUS) & S_COMMAND_IN_PROGRESS);
outw(BASE + VX_COMMAND, SET_RX_EARLY_THRESH |
(sc->rx_early_thresh = delta));
}
/*
* Look familiar?
*/
static int
vxioctl(ifp, cmd, data)
register struct ifnet *ifp;
int cmd;
caddr_t data;
{
register struct ifaddr *ifa = (struct ifaddr *) data;
struct vx_softc *sc = &vx_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:
vxinit(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));
}
vxinit(ifp->if_unit);
break;
}
#endif
default:
vxinit(ifp->if_unit);
break;
}
break;
case SIOCGIFADDR:
{
struct sockaddr *sa;
sa = (struct sockaddr *) & ifr->ifr_data;
bcopy((caddr_t) sc->arpcom.ac_enaddr,
(caddr_t) sa->sa_data, ETHER_ADDR_LEN);
}
break;
case SIOCSIFFLAGS:
if ((ifp->if_flags & IFF_UP) == 0 && ifp->if_flags & IFF_RUNNING) {
ifp->if_flags &= ~IFF_RUNNING;
vxstop(ifp->if_unit);
vxmbufempty(sc);
break;
} else {
/* reinitialize card on any parameter change */
vxinit(ifp->if_unit);
break;
}
/* NOTREACHED */
if (ifp->if_flags & IFF_UP && (ifp->if_flags & IFF_RUNNING) == 0)
vxinit(ifp->if_unit);
if ( (ifp->if_flags & IFF_PROMISC) && !vx_ftst(F_PROMISC) ) {
vx_fset(F_PROMISC);
vxinit(ifp->if_unit);
}
else if( !(ifp->if_flags & IFF_PROMISC) && vx_ftst(F_PROMISC) ) {
vx_frst(F_PROMISC);
vxinit(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);
}
static void
vxreset(unit)
int unit;
{
int s = splimp();
vxstop(unit);
vxinit(unit);
splx(s);
}
static void
vxwatchdog(ifp)
struct ifnet *ifp;
{
/*
printf("vx: watchdog\n");
log(LOG_ERR, "vx%d: watchdog\n", ifp->if_unit);
ifp->if_oerrors++;
*/
/* vxreset(ifp->if_unit); */
ifp->if_flags &= ~IFF_OACTIVE;
vxstart(ifp);
vxintr(ifp->if_unit);
}
static void
vxstop(unit)
int unit;
{
struct vx_softc *sc = &vx_softc[unit];
outw(BASE + VX_COMMAND, RX_DISABLE);
outw(BASE + VX_COMMAND, RX_DISCARD_TOP_PACK);
while (inw(BASE + VX_STATUS) & S_COMMAND_IN_PROGRESS);
outw(BASE + VX_COMMAND, TX_DISABLE);
outw(BASE + VX_COMMAND, STOP_TRANSCEIVER);
outw(BASE + VX_COMMAND, RX_RESET);
outw(BASE + VX_COMMAND, TX_RESET);
outw(BASE + VX_COMMAND, C_INTR_LATCH);
outw(BASE + VX_COMMAND, SET_RD_0_MASK);
outw(BASE + VX_COMMAND, SET_INTR_MASK);
outw(BASE + VX_COMMAND, SET_RX_FILTER);
}
/*
* We suppose this is always called inside a splimp(){...}splx() region
*/
static void
vxmbuffill(sp, dummy_arg)
caddr_t sp;
int dummy_arg;
{
struct vx_softc *sc = (struct vx_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
vxmbufempty(sc)
struct vx_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 /* NVX > 0 */
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