| Current Path : /sys/dev/ep/ |
FreeBSD hs32.drive.ne.jp 9.1-RELEASE FreeBSD 9.1-RELEASE #1: Wed Jan 14 12:18:08 JST 2015 root@hs32.drive.ne.jp:/sys/amd64/compile/hs32 amd64 |
| Current File : //sys/dev/ep/if_ep.c |
/*-
* 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.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD: release/9.1.0/sys/dev/ep/if_ep.c 207554 2010-05-03 07:32:50Z sobomax $");
/*
* 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
*/
/*
* Pccard support for 3C589 by:
* HAMADA Naoki
* nao@tom-yam.or.jp
*/
/*
* MAINTAINER: Matthew N. Dodd <winter@jurai.net>
* <mdodd@FreeBSD.org>
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/mbuf.h>
#include <sys/socket.h>
#include <sys/sockio.h>
#include <sys/bus.h>
#include <machine/bus.h>
#include <machine/resource.h>
#include <sys/rman.h>
#include <net/if.h>
#include <net/if_dl.h>
#include <net/if_media.h>
#include <net/if_types.h>
#include <net/ethernet.h>
#include <net/bpf.h>
#include <dev/ep/if_epreg.h>
#include <dev/ep/if_epvar.h>
/* Exported variables */
devclass_t ep_devclass;
static int ep_media2if_media[] =
{IFM_10_T, IFM_10_5, IFM_NONE, IFM_10_2, IFM_NONE};
/* if functions */
static void epinit(void *);
static int epioctl(struct ifnet *, u_long, caddr_t);
static void epstart(struct ifnet *);
static void ep_intr_locked(struct ep_softc *);
static void epstart_locked(struct ifnet *);
static void epinit_locked(struct ep_softc *);
static void eptick(void *);
static void epwatchdog(struct ep_softc *);
/* if_media functions */
static int ep_ifmedia_upd(struct ifnet *);
static void ep_ifmedia_sts(struct ifnet *, struct ifmediareq *);
static void epstop(struct ep_softc *);
static void epread(struct ep_softc *);
static int eeprom_rdy(struct ep_softc *);
#define EP_FTST(sc, f) (sc->stat & (f))
#define EP_FSET(sc, f) (sc->stat |= (f))
#define EP_FRST(sc, f) (sc->stat &= ~(f))
static int
eeprom_rdy(struct ep_softc *sc)
{
int i;
for (i = 0; is_eeprom_busy(sc) && i < MAX_EEPROMBUSY; i++)
DELAY(100);
if (i >= MAX_EEPROMBUSY) {
device_printf(sc->dev, "eeprom failed to come ready.\n");
return (ENXIO);
}
return (0);
}
/*
* get_e: gets a 16 bits word from the EEPROM. we must have set the window
* before
*/
int
ep_get_e(struct ep_softc *sc, uint16_t offset, uint16_t *result)
{
if (eeprom_rdy(sc))
return (ENXIO);
CSR_WRITE_2(sc, EP_W0_EEPROM_COMMAND,
(EEPROM_CMD_RD << sc->epb.cmd_off) | offset);
if (eeprom_rdy(sc))
return (ENXIO);
(*result) = CSR_READ_2(sc, EP_W0_EEPROM_DATA);
return (0);
}
static int
ep_get_macaddr(struct ep_softc *sc, u_char *addr)
{
int i;
uint16_t result;
int error;
uint16_t *macaddr;
macaddr = (uint16_t *) addr;
GO_WINDOW(sc, 0);
for (i = EEPROM_NODE_ADDR_0; i <= EEPROM_NODE_ADDR_2; i++) {
error = ep_get_e(sc, i, &result);
if (error)
return (error);
macaddr[i] = htons(result);
}
return (0);
}
int
ep_alloc(device_t dev)
{
struct ep_softc *sc = device_get_softc(dev);
int rid;
int error = 0;
uint16_t result;
rid = 0;
sc->iobase = bus_alloc_resource_any(dev, SYS_RES_IOPORT, &rid,
RF_ACTIVE);
if (!sc->iobase) {
device_printf(dev, "No I/O space?!\n");
error = ENXIO;
goto bad;
}
rid = 0;
sc->irq = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid, RF_ACTIVE);
if (!sc->irq) {
device_printf(dev, "No irq?!\n");
error = ENXIO;
goto bad;
}
sc->dev = dev;
sc->stat = 0; /* 16 bit access */
sc->bst = rman_get_bustag(sc->iobase);
sc->bsh = rman_get_bushandle(sc->iobase);
sc->ep_connectors = 0;
sc->ep_connector = 0;
GO_WINDOW(sc, 0);
error = ep_get_e(sc, EEPROM_PROD_ID, &result);
if (error)
goto bad;
sc->epb.prod_id = result;
error = ep_get_e(sc, EEPROM_RESOURCE_CFG, &result);
if (error)
goto bad;
sc->epb.res_cfg = result;
bad:
if (error != 0)
ep_free(dev);
return (error);
}
void
ep_get_media(struct ep_softc *sc)
{
uint16_t config;
GO_WINDOW(sc, 0);
config = CSR_READ_2(sc, EP_W0_CONFIG_CTRL);
if (config & IS_AUI)
sc->ep_connectors |= AUI;
if (config & IS_BNC)
sc->ep_connectors |= BNC;
if (config & IS_UTP)
sc->ep_connectors |= UTP;
if (!(sc->ep_connectors & 7))
if (bootverbose)
device_printf(sc->dev, "no connectors!\n");
/*
* This works for most of the cards so we'll do it here.
* The cards that require something different can override
* this later on.
*/
sc->ep_connector = CSR_READ_2(sc, EP_W0_ADDRESS_CFG) >> ACF_CONNECTOR_BITS;
}
void
ep_free(device_t dev)
{
struct ep_softc *sc = device_get_softc(dev);
if (sc->ep_intrhand)
bus_teardown_intr(dev, sc->irq, sc->ep_intrhand);
if (sc->iobase)
bus_release_resource(dev, SYS_RES_IOPORT, 0, sc->iobase);
if (sc->irq)
bus_release_resource(dev, SYS_RES_IRQ, 0, sc->irq);
sc->ep_intrhand = 0;
sc->iobase = 0;
sc->irq = 0;
}
static void
ep_setup_station(struct ep_softc *sc, u_char *enaddr)
{
int i;
/*
* Setup the station address
*/
GO_WINDOW(sc, 2);
for (i = 0; i < ETHER_ADDR_LEN; i++)
CSR_WRITE_1(sc, EP_W2_ADDR_0 + i, enaddr[i]);
}
int
ep_attach(struct ep_softc *sc)
{
struct ifnet *ifp = NULL;
struct ifmedia *ifm = NULL;
int error;
sc->gone = 0;
EP_LOCK_INIT(sc);
if (! (sc->stat & F_ENADDR_SKIP)) {
error = ep_get_macaddr(sc, sc->eaddr);
if (error) {
device_printf(sc->dev, "Unable to get MAC address!\n");
EP_LOCK_DESTROY(sc);
return (ENXIO);
}
}
ep_setup_station(sc, sc->eaddr);
ifp = sc->ifp = if_alloc(IFT_ETHER);
if (ifp == NULL) {
device_printf(sc->dev, "if_alloc() failed\n");
EP_LOCK_DESTROY(sc);
return (ENOSPC);
}
ifp->if_softc = sc;
if_initname(ifp, device_get_name(sc->dev), device_get_unit(sc->dev));
ifp->if_mtu = ETHERMTU;
ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST;
ifp->if_start = epstart;
ifp->if_ioctl = epioctl;
ifp->if_init = epinit;
IFQ_SET_MAXLEN(&ifp->if_snd, ifqmaxlen);
ifp->if_snd.ifq_drv_maxlen = ifqmaxlen;
IFQ_SET_READY(&ifp->if_snd);
callout_init_mtx(&sc->watchdog_timer, &sc->sc_mtx, 0);
if (!sc->epb.mii_trans) {
ifmedia_init(&sc->ifmedia, 0, ep_ifmedia_upd, ep_ifmedia_sts);
if (sc->ep_connectors & AUI)
ifmedia_add(&sc->ifmedia,
IFM_ETHER | IFM_10_5, 0, NULL);
if (sc->ep_connectors & UTP)
ifmedia_add(&sc->ifmedia,
IFM_ETHER | IFM_10_T, 0, NULL);
if (sc->ep_connectors & BNC)
ifmedia_add(&sc->ifmedia,
IFM_ETHER | IFM_10_2, 0, NULL);
if (!sc->ep_connectors)
ifmedia_add(&sc->ifmedia,
IFM_ETHER | IFM_NONE, 0, NULL);
ifmedia_set(&sc->ifmedia,
IFM_ETHER | ep_media2if_media[sc->ep_connector]);
ifm = &sc->ifmedia;
ifm->ifm_media = ifm->ifm_cur->ifm_media;
ep_ifmedia_upd(ifp);
}
ether_ifattach(ifp, sc->eaddr);
#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(sc, F_RX_FIRST);
sc->top = sc->mcur = 0;
epstop(sc);
return (0);
}
int
ep_detach(device_t dev)
{
struct ep_softc *sc;
struct ifnet *ifp;
sc = device_get_softc(dev);
ifp = sc->ifp;
EP_ASSERT_UNLOCKED(sc);
EP_LOCK(sc);
if (bus_child_present(dev))
epstop(sc);
sc->gone = 1;
ifp->if_drv_flags &= ~IFF_DRV_RUNNING;
EP_UNLOCK(sc);
ether_ifdetach(ifp);
callout_drain(&sc->watchdog_timer);
ep_free(dev);
if_free(ifp);
EP_LOCK_DESTROY(sc);
return (0);
}
static void
epinit(void *xsc)
{
struct ep_softc *sc = xsc;
EP_LOCK(sc);
epinit_locked(sc);
EP_UNLOCK(sc);
}
/*
* The order in here seems important. Otherwise we may not receive
* interrupts. ?!
*/
static void
epinit_locked(struct ep_softc *sc)
{
struct ifnet *ifp = sc->ifp;
int i;
if (sc->gone)
return;
EP_ASSERT_LOCKED(sc);
EP_BUSY_WAIT(sc);
GO_WINDOW(sc, 0);
CSR_WRITE_2(sc, EP_COMMAND, STOP_TRANSCEIVER);
GO_WINDOW(sc, 4);
CSR_WRITE_2(sc, EP_W4_MEDIA_TYPE, DISABLE_UTP);
GO_WINDOW(sc, 0);
/* Disable the card */
CSR_WRITE_2(sc, EP_W0_CONFIG_CTRL, 0);
/* Enable the card */
CSR_WRITE_2(sc, EP_W0_CONFIG_CTRL, ENABLE_DRQ_IRQ);
GO_WINDOW(sc, 2);
/* Reload the ether_addr. */
ep_setup_station(sc, IF_LLADDR(sc->ifp));
CSR_WRITE_2(sc, EP_COMMAND, RX_RESET);
CSR_WRITE_2(sc, EP_COMMAND, TX_RESET);
EP_BUSY_WAIT(sc);
/* Window 1 is operating window */
GO_WINDOW(sc, 1);
for (i = 0; i < 31; i++)
CSR_READ_1(sc, EP_W1_TX_STATUS);
/* get rid of stray intr's */
CSR_WRITE_2(sc, EP_COMMAND, ACK_INTR | 0xff);
CSR_WRITE_2(sc, EP_COMMAND, SET_RD_0_MASK | S_5_INTS);
CSR_WRITE_2(sc, EP_COMMAND, SET_INTR_MASK | S_5_INTS);
if (ifp->if_flags & IFF_PROMISC)
CSR_WRITE_2(sc, EP_COMMAND, SET_RX_FILTER | FIL_INDIVIDUAL |
FIL_MULTICAST | FIL_BRDCST | FIL_PROMISC);
else
CSR_WRITE_2(sc, EP_COMMAND, SET_RX_FILTER | FIL_INDIVIDUAL |
FIL_MULTICAST | FIL_BRDCST);
if (!sc->epb.mii_trans)
ep_ifmedia_upd(ifp);
if (sc->stat & F_HAS_TX_PLL)
CSR_WRITE_2(sc, EP_COMMAND, TX_PLL_ENABLE);
CSR_WRITE_2(sc, EP_COMMAND, RX_ENABLE);
CSR_WRITE_2(sc, EP_COMMAND, TX_ENABLE);
ifp->if_drv_flags |= IFF_DRV_RUNNING;
ifp->if_drv_flags &= ~IFF_DRV_OACTIVE; /* just in case */
#ifdef EP_LOCAL_STATS
sc->rx_no_first = sc->rx_no_mbuf =
sc->rx_overrunf = sc->rx_overrunl = sc->tx_underrun = 0;
#endif
EP_FSET(sc, F_RX_FIRST);
if (sc->top) {
m_freem(sc->top);
sc->top = sc->mcur = 0;
}
CSR_WRITE_2(sc, EP_COMMAND, SET_RX_EARLY_THRESH | RX_INIT_EARLY_THRESH);
CSR_WRITE_2(sc, EP_COMMAND, SET_TX_START_THRESH | 16);
GO_WINDOW(sc, 1);
epstart_locked(ifp);
callout_reset(&sc->watchdog_timer, hz, eptick, sc);
}
static void
epstart(struct ifnet *ifp)
{
struct ep_softc *sc;
sc = ifp->if_softc;
EP_LOCK(sc);
epstart_locked(ifp);
EP_UNLOCK(sc);
}
static void
epstart_locked(struct ifnet *ifp)
{
struct ep_softc *sc;
u_int len;
struct mbuf *m, *m0;
int pad, started;
sc = ifp->if_softc;
if (sc->gone)
return;
EP_ASSERT_LOCKED(sc);
EP_BUSY_WAIT(sc);
if (ifp->if_drv_flags & IFF_DRV_OACTIVE)
return;
started = 0;
startagain:
/* Sneak a peek at the next packet */
IFQ_DRV_DEQUEUE(&ifp->if_snd, m0);
if (m0 == NULL)
return;
if (!started && (sc->stat & F_HAS_TX_PLL))
CSR_WRITE_2(sc, EP_COMMAND, TX_PLL_ENABLE);
started++;
for (len = 0, m = m0; m != NULL; m = m->m_next)
len += m->m_len;
pad = (4 - 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 */
ifp->if_oerrors++;
m_freem(m0);
goto readcheck;
}
if (CSR_READ_2(sc, EP_W1_FREE_TX) < len + pad + 4) {
/* no room in FIFO */
CSR_WRITE_2(sc, EP_COMMAND, SET_TX_AVAIL_THRESH | (len + pad + 4));
/* make sure */
if (CSR_READ_2(sc, EP_W1_FREE_TX) < len + pad + 4) {
ifp->if_drv_flags |= IFF_DRV_OACTIVE;
IFQ_DRV_PREPEND(&ifp->if_snd, m0);
goto done;
}
} else
CSR_WRITE_2(sc, EP_COMMAND,
SET_TX_AVAIL_THRESH | EP_THRESH_DISABLE);
/* XXX 4.x and earlier would splhigh here */
CSR_WRITE_2(sc, EP_W1_TX_PIO_WR_1, len);
/* Second dword meaningless */
CSR_WRITE_2(sc, EP_W1_TX_PIO_WR_1, 0x0);
if (EP_FTST(sc, F_ACCESS_32_BITS)) {
for (m = m0; m != NULL; m = m->m_next) {
if (m->m_len > 3)
CSR_WRITE_MULTI_4(sc, EP_W1_TX_PIO_WR_1,
mtod(m, uint32_t *), m->m_len / 4);
if (m->m_len & 3)
CSR_WRITE_MULTI_1(sc, EP_W1_TX_PIO_WR_1,
mtod(m, uint8_t *)+(m->m_len & (~3)),
m->m_len & 3);
}
} else {
for (m = m0; m != NULL; m = m->m_next) {
if (m->m_len > 1)
CSR_WRITE_MULTI_2(sc, EP_W1_TX_PIO_WR_1,
mtod(m, uint16_t *), m->m_len / 2);
if (m->m_len & 1)
CSR_WRITE_1(sc, EP_W1_TX_PIO_WR_1,
*(mtod(m, uint8_t *)+m->m_len - 1));
}
}
while (pad--)
CSR_WRITE_1(sc, EP_W1_TX_PIO_WR_1, 0); /* Padding */
/* XXX and drop splhigh here */
BPF_MTAP(ifp, m0);
sc->tx_timer = 2;
ifp->if_opackets++;
m_freem(m0);
/*
* Is another packet coming in? We don't want to overflow
* the tiny RX fifo.
*/
readcheck:
if (CSR_READ_2(sc, EP_W1_RX_STATUS) & RX_BYTES_MASK) {
/*
* we check if we have packets left, in that case
* we prepare to come back later
*/
if (!IFQ_DRV_IS_EMPTY(&ifp->if_snd))
CSR_WRITE_2(sc, EP_COMMAND, SET_TX_AVAIL_THRESH | 8);
goto done;
}
goto startagain;
done:;
return;
}
void
ep_intr(void *arg)
{
struct ep_softc *sc;
sc = (struct ep_softc *) arg;
EP_LOCK(sc);
ep_intr_locked(sc);
EP_UNLOCK(sc);
}
static void
ep_intr_locked(struct ep_softc *sc)
{
int status;
struct ifnet *ifp;
/* XXX 4.x splbio'd here to reduce interruptability */
/*
* quick fix: Try to detect an interrupt when the card goes away.
*/
if (sc->gone || CSR_READ_2(sc, EP_STATUS) == 0xffff)
return;
ifp = sc->ifp;
CSR_WRITE_2(sc, EP_COMMAND, SET_INTR_MASK); /* disable all Ints */
rescan:
while ((status = CSR_READ_2(sc, EP_STATUS)) & S_5_INTS) {
/* first acknowledge all interrupt sources */
CSR_WRITE_2(sc, EP_COMMAND, ACK_INTR | (status & S_MASK));
if (status & (S_RX_COMPLETE | S_RX_EARLY))
epread(sc);
if (status & S_TX_AVAIL) {
/* we need ACK */
sc->tx_timer = 0;
ifp->if_drv_flags &= ~IFF_DRV_OACTIVE;
GO_WINDOW(sc, 1);
CSR_READ_2(sc, EP_W1_FREE_TX);
epstart_locked(ifp);
}
if (status & S_CARD_FAILURE) {
sc->tx_timer = 0;
#ifdef EP_LOCAL_STATS
device_printf(sc->dev, "\n\tStatus: %x\n", status);
GO_WINDOW(sc, 4);
printf("\tFIFO Diagnostic: %x\n",
CSR_READ_2(sc, EP_W4_FIFO_DIAG));
printf("\tStat: %x\n", sc->stat);
printf("\tIpackets=%d, Opackets=%d\n",
ifp->if_ipackets, ifp->if_opackets);
printf("\tNOF=%d, NOMB=%d, RXOF=%d, RXOL=%d, TXU=%d\n",
sc->rx_no_first, sc->rx_no_mbuf, sc->rx_overrunf,
sc->rx_overrunl, sc->tx_underrun);
#else
#ifdef DIAGNOSTIC
device_printf(sc->dev,
"Status: %x (input buffer overflow)\n", status);
#else
++ifp->if_ierrors;
#endif
#endif
epinit_locked(sc);
return;
}
if (status & S_TX_COMPLETE) {
sc->tx_timer = 0;
/*
* 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 = CSR_READ_1(sc, EP_W1_TX_STATUS)) &
TXS_COMPLETE) {
if (status & TXS_SUCCES_INTR_REQ)
; /* nothing */
else if (status &
(TXS_UNDERRUN | TXS_JABBER |
TXS_MAX_COLLISION)) {
CSR_WRITE_2(sc, EP_COMMAND, TX_RESET);
if (status & TXS_UNDERRUN) {
#ifdef EP_LOCAL_STATS
sc->tx_underrun++;
#endif
}
if (status & TXS_MAX_COLLISION) {
/*
* TXS_MAX_COLLISION we
* shouldn't get here
*/
++ifp->if_collisions;
}
++ifp->if_oerrors;
CSR_WRITE_2(sc, EP_COMMAND, TX_ENABLE);
/*
* To have a tx_avail_int but giving
* the chance to the Reception
*/
if (!IFQ_DRV_IS_EMPTY(&ifp->if_snd))
CSR_WRITE_2(sc, EP_COMMAND,
SET_TX_AVAIL_THRESH | 8);
}
/* pops up the next status */
CSR_WRITE_1(sc, EP_W1_TX_STATUS, 0x0);
} /* while */
ifp->if_drv_flags &= ~IFF_DRV_OACTIVE;
GO_WINDOW(sc, 1);
CSR_READ_2(sc, EP_W1_FREE_TX);
epstart_locked(ifp);
} /* end TX_COMPLETE */
}
CSR_WRITE_2(sc, EP_COMMAND, C_INTR_LATCH); /* ACK int Latch */
if ((status = CSR_READ_2(sc, EP_STATUS)) & S_5_INTS)
goto rescan;
/* re-enable Ints */
CSR_WRITE_2(sc, EP_COMMAND, SET_INTR_MASK | S_5_INTS);
}
static void
epread(struct ep_softc *sc)
{
struct mbuf *top, *mcur, *m;
struct ifnet *ifp;
int lenthisone;
short rx_fifo2, status;
short rx_fifo;
/* XXX Must be called with sc locked */
ifp = sc->ifp;
status = CSR_READ_2(sc, EP_W1_RX_STATUS);
read_again:
if (status & ERR_RX) {
++ifp->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(sc, F_RX_FIRST))
sc->rx_overrunf++;
else
sc->rx_overrunl++;
#endif
}
goto out;
}
rx_fifo = rx_fifo2 = status & RX_BYTES_MASK;
if (EP_FTST(sc, F_RX_FIRST)) {
MGETHDR(m, M_DONTWAIT, MT_DATA);
if (!m)
goto out;
if (rx_fifo >= MINCLSIZE)
MCLGET(m, M_DONTWAIT);
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. */
CSR_READ_MULTI_2(sc, EP_W1_RX_PIO_RD_1,
mtod(top, uint16_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;
}
/* 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;
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(sc, F_ACCESS_32_BITS)) {
/* default for EISA configured cards */
CSR_READ_MULTI_4(sc, EP_W1_RX_PIO_RD_1,
(uint32_t *)(mtod(m, caddr_t)+m->m_len),
lenthisone / 4);
m->m_len += (lenthisone & ~3);
if (lenthisone & 3)
CSR_READ_MULTI_1(sc, EP_W1_RX_PIO_RD_1,
mtod(m, caddr_t)+m->m_len, lenthisone & 3);
m->m_len += (lenthisone & 3);
} else {
CSR_READ_MULTI_2(sc, EP_W1_RX_PIO_RD_1,
(uint16_t *)(mtod(m, caddr_t)+m->m_len),
lenthisone / 2);
m->m_len += lenthisone;
if (lenthisone & 1)
*(mtod(m, caddr_t)+m->m_len - 1) =
CSR_READ_1(sc, EP_W1_RX_PIO_RD_1);
}
rx_fifo -= lenthisone;
}
if (status & ERR_RX_INCOMPLETE) {
/* we haven't received the complete packet */
sc->mcur = m;
#ifdef EP_LOCAL_STATS
/* to know how often we come here */
sc->rx_no_first++;
#endif
EP_FRST(sc, F_RX_FIRST);
status = CSR_READ_2(sc, EP_W1_RX_STATUS);
if (!(status & ERR_RX_INCOMPLETE)) {
/*
* We see if by now, the packet has completly
* arrived
*/
goto read_again;
}
CSR_WRITE_2(sc, EP_COMMAND,
SET_RX_EARLY_THRESH | RX_NEXT_EARLY_THRESH);
return;
}
CSR_WRITE_2(sc, EP_COMMAND, RX_DISCARD_TOP_PACK);
++ifp->if_ipackets;
EP_FSET(sc, F_RX_FIRST);
top->m_pkthdr.rcvif = sc->ifp;
top->m_pkthdr.len = sc->cur_len;
/*
* Drop locks before calling if_input() since it may re-enter
* ep_start() in the netisr case. This would result in a
* lock reversal. Better performance might be obtained by
* chaining all packets received, dropping the lock, and then
* calling if_input() on each one.
*/
EP_UNLOCK(sc);
(*ifp->if_input) (ifp, top);
EP_LOCK(sc);
sc->top = 0;
EP_BUSY_WAIT(sc);
CSR_WRITE_2(sc, EP_COMMAND, SET_RX_EARLY_THRESH | RX_INIT_EARLY_THRESH);
return;
out:
CSR_WRITE_2(sc, 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
}
EP_FSET(sc, F_RX_FIRST);
EP_BUSY_WAIT(sc);
CSR_WRITE_2(sc, EP_COMMAND, SET_RX_EARLY_THRESH | RX_INIT_EARLY_THRESH);
}
static int
ep_ifmedia_upd(struct ifnet *ifp)
{
struct ep_softc *sc = ifp->if_softc;
int i = 0, j;
GO_WINDOW(sc, 0);
CSR_WRITE_2(sc, EP_COMMAND, STOP_TRANSCEIVER);
GO_WINDOW(sc, 4);
CSR_WRITE_2(sc, EP_W4_MEDIA_TYPE, DISABLE_UTP);
GO_WINDOW(sc, 0);
switch (IFM_SUBTYPE(sc->ifmedia.ifm_media)) {
case IFM_10_T:
if (sc->ep_connectors & UTP) {
i = ACF_CONNECTOR_UTP;
GO_WINDOW(sc, 4);
CSR_WRITE_2(sc, EP_W4_MEDIA_TYPE, ENABLE_UTP);
}
break;
case IFM_10_2:
if (sc->ep_connectors & BNC) {
i = ACF_CONNECTOR_BNC;
CSR_WRITE_2(sc, EP_COMMAND, START_TRANSCEIVER);
DELAY(DELAY_MULTIPLE * 1000);
}
break;
case IFM_10_5:
if (sc->ep_connectors & AUI)
i = ACF_CONNECTOR_AUI;
break;
default:
i = sc->ep_connector;
device_printf(sc->dev,
"strange connector type in EEPROM: assuming AUI\n");
}
GO_WINDOW(sc, 0);
j = CSR_READ_2(sc, EP_W0_ADDRESS_CFG) & 0x3fff;
CSR_WRITE_2(sc, EP_W0_ADDRESS_CFG, j | (i << ACF_CONNECTOR_BITS));
return (0);
}
static void
ep_ifmedia_sts(struct ifnet *ifp, struct ifmediareq *ifmr)
{
struct ep_softc *sc = ifp->if_softc;
uint16_t ms;
switch (IFM_SUBTYPE(sc->ifmedia.ifm_media)) {
case IFM_10_T:
GO_WINDOW(sc, 4);
ms = CSR_READ_2(sc, EP_W4_MEDIA_TYPE);
GO_WINDOW(sc, 0);
ifmr->ifm_status = IFM_AVALID;
if (ms & MT_LB) {
ifmr->ifm_status |= IFM_ACTIVE;
ifmr->ifm_active = IFM_ETHER | IFM_10_T;
} else {
ifmr->ifm_active = IFM_ETHER | IFM_NONE;
}
break;
default:
ifmr->ifm_active = sc->ifmedia.ifm_media;
break;
}
}
static int
epioctl(struct ifnet *ifp, u_long cmd, caddr_t data)
{
struct ep_softc *sc = ifp->if_softc;
struct ifreq *ifr = (struct ifreq *) data;
int error = 0;
switch (cmd) {
case SIOCSIFFLAGS:
EP_LOCK(sc);
if (((ifp->if_flags & IFF_UP) == 0) &&
(ifp->if_drv_flags & IFF_DRV_RUNNING)) {
epstop(sc);
} else
/* reinitialize card on any parameter change */
epinit_locked(sc);
EP_UNLOCK(sc);
break;
case SIOCADDMULTI:
case SIOCDELMULTI:
/*
* The Etherlink III has no programmable multicast
* filter. We always initialize the card to be
* promiscuous to multicast, since we're always a
* member of the ALL-SYSTEMS group, so there's no
* need to process SIOC*MULTI requests.
*/
error = 0;
break;
case SIOCSIFMEDIA:
case SIOCGIFMEDIA:
if (!sc->epb.mii_trans)
error = ifmedia_ioctl(ifp, ifr, &sc->ifmedia, cmd);
else
error = EINVAL;
break;
default:
error = ether_ioctl(ifp, cmd, data);
break;
}
return (error);
}
static void
eptick(void *arg)
{
struct ep_softc *sc;
sc = arg;
if (sc->tx_timer != 0 && --sc->tx_timer == 0)
epwatchdog(sc);
callout_reset(&sc->watchdog_timer, hz, eptick, sc);
}
static void
epwatchdog(struct ep_softc *sc)
{
struct ifnet *ifp;
ifp = sc->ifp;
if (sc->gone)
return;
ifp->if_drv_flags &= ~IFF_DRV_OACTIVE;
epstart_locked(ifp);
ep_intr_locked(sc);
}
static void
epstop(struct ep_softc *sc)
{
CSR_WRITE_2(sc, EP_COMMAND, RX_DISABLE);
CSR_WRITE_2(sc, EP_COMMAND, RX_DISCARD_TOP_PACK);
EP_BUSY_WAIT(sc);
CSR_WRITE_2(sc, EP_COMMAND, TX_DISABLE);
CSR_WRITE_2(sc, EP_COMMAND, STOP_TRANSCEIVER);
DELAY(800);
CSR_WRITE_2(sc, EP_COMMAND, RX_RESET);
EP_BUSY_WAIT(sc);
CSR_WRITE_2(sc, EP_COMMAND, TX_RESET);
EP_BUSY_WAIT(sc);
CSR_WRITE_2(sc, EP_COMMAND, C_INTR_LATCH);
CSR_WRITE_2(sc, EP_COMMAND, SET_RD_0_MASK);
CSR_WRITE_2(sc, EP_COMMAND, SET_INTR_MASK);
CSR_WRITE_2(sc, EP_COMMAND, SET_RX_FILTER);
sc->ifp->if_drv_flags &= ~(IFF_DRV_RUNNING | IFF_DRV_OACTIVE);
callout_stop(&sc->watchdog_timer);
}