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freebsd/sys/dev/xe/if_xe.c
Robert Watson 2a8c860fe3 In order to reduce use of M_EXT outside of the mbuf allocator and 
socket-buffer implementations, introduce a return value for MCLGET()
(and m_cljget() that underlies it) to allow the caller to avoid testing
M_EXT itself.  Update all callers to use the return value.

With this change, very few network device drivers remain aware of
M_EXT; the primary exceptions lie in mbuf-chain pretty printers for
debugging, and in a few cases, custom mbuf and cluster allocation
implementations.

NB: This is a difficult-to-test change as it touches many drivers for
which I don't have physical devices.  Instead we've gone for intensive
review, but further post-commit review would definitely be appreciated
to spot errors where changes could not easily be made mechanically,
but were largely mechanical in nature.

Differential Revision:	https://reviews.freebsd.org/D1440
Reviewed by:	adrian, bz, gnn
Sponsored by:	EMC / Isilon Storage Division
2015-01-06 12:59:37 +00:00

2074 lines
53 KiB
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/*-
* Copyright (c) 1998, 1999, 2003 Scott Mitchell
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
/*-
* Portions of this software were derived from Werner Koch's xirc2ps driver
* for Linux under the terms of the following license (from v1.30 of the
* xirc2ps driver):
*
* Copyright (c) 1997 by Werner Koch (dd9jn)
*
* 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, and the entire permission notice in its entirety,
* including the disclaimer of warranties.
* 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. 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 ``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("$FreeBSD$");
/*
* FreeBSD device driver for Xircom CreditCard PCMCIA Ethernet adapters. The
* following cards are currently known to work with the driver:
* Xircom CreditCard 10/100 (CE3)
* Xircom CreditCard Ethernet + Modem 28 (CEM28)
* Xircom CreditCard Ethernet 10/100 + Modem 56 (CEM56)
* Xircom RealPort Ethernet 10
* Xircom RealPort Ethernet 10/100
* Xircom RealPort Ethernet 10/100 + Modem 56 (REM56, REM56G)
* Intel EtherExpress Pro/100 PC Card Mobile Adapter 16 (Pro/100 M16A)
* Compaq Netelligent 10/100 PC Card (CPQ-10/100)
*
* Some other cards *should* work, but support for them is either broken or in
* an unknown state at the moment. I'm always interested in hearing from
* people who own any of these cards:
* Xircom CreditCard 10Base-T (PS-CE2-10)
* Xircom CreditCard Ethernet + ModemII (CEM2)
* Xircom CEM28 and CEM33 Ethernet/Modem cards (may be variants of CEM2?)
*
* Thanks to all who assisted with the development and testing of the driver,
* especially: Werner Koch, Duke Kamstra, Duncan Barclay, Jason George, Dru
* Nelson, Mike Kephart, Bill Rainey and Douglas Rand. Apologies if I've left
* out anyone who deserves a mention here.
*
* Special thanks to Ade Lovett for both hosting the mailing list and doing
* the CEM56/REM56 support code; and the FreeBSD UK Users' Group for hosting
* the web pages.
*
* Author email: <scott@uk.freebsd.org>
* Driver web page: http://ukug.uk.freebsd.org/~scott/xe_drv/
*/
#include <sys/param.h>
#include <sys/cdefs.h>
#include <sys/errno.h>
#include <sys/kernel.h>
#include <sys/mbuf.h>
#include <sys/socket.h>
#include <sys/sockio.h>
#include <sys/systm.h>
#include <sys/uio.h>
#include <sys/sysctl.h>
#include <sys/module.h>
#include <sys/bus.h>
#include <machine/bus.h>
#include <machine/resource.h>
#include <sys/rman.h>
#include <net/ethernet.h>
#include <net/if.h>
#include <net/if_var.h>
#include <net/if_arp.h>
#include <net/if_dl.h>
#include <net/if_media.h>
#include <net/if_mib.h>
#include <net/bpf.h>
#include <net/if_types.h>
#include <dev/xe/if_xereg.h>
#include <dev/xe/if_xevar.h>
/*
* MII command structure
*/
struct xe_mii_frame {
uint8_t mii_stdelim;
uint8_t mii_opcode;
uint8_t mii_phyaddr;
uint8_t mii_regaddr;
uint8_t mii_turnaround;
uint16_t mii_data;
};
/*
* Media autonegotiation progress constants
*/
#define XE_AUTONEG_NONE 0 /* No autonegotiation in progress */
#define XE_AUTONEG_WAITING 1 /* Waiting for transmitter to go idle */
#define XE_AUTONEG_STARTED 2 /* Waiting for autonegotiation to complete */
#define XE_AUTONEG_100TX 3 /* Trying to force 100baseTX link */
#define XE_AUTONEG_FAIL 4 /* Autonegotiation failed */
/*
* Prototypes start here
*/
static void xe_init(void *xscp);
static void xe_init_locked(struct xe_softc *scp);
static void xe_start(struct ifnet *ifp);
static void xe_start_locked(struct ifnet *ifp);
static int xe_ioctl(struct ifnet *ifp, u_long command, caddr_t data);
static void xe_watchdog(void *arg);
static void xe_intr(void *xscp);
static void xe_txintr(struct xe_softc *scp, uint8_t txst1);
static void xe_macintr(struct xe_softc *scp, uint8_t rst0, uint8_t txst0,
uint8_t txst1);
static void xe_rxintr(struct xe_softc *scp, uint8_t rst0);
static int xe_media_change(struct ifnet *ifp);
static void xe_media_status(struct ifnet *ifp, struct ifmediareq *mrp);
static void xe_setmedia(void *arg);
static void xe_reset(struct xe_softc *scp);
static void xe_enable_intr(struct xe_softc *scp);
static void xe_disable_intr(struct xe_softc *scp);
static void xe_set_multicast(struct xe_softc *scp);
static void xe_set_addr(struct xe_softc *scp, uint8_t* addr, unsigned idx);
static void xe_mchash(struct xe_softc *scp, const uint8_t *addr);
static int xe_pio_write_packet(struct xe_softc *scp, struct mbuf *mbp);
/*
* MII functions
*/
static void xe_mii_sync(struct xe_softc *scp);
static int xe_mii_init(struct xe_softc *scp);
static void xe_mii_send(struct xe_softc *scp, uint32_t bits, int cnt);
static int xe_mii_readreg(struct xe_softc *scp,
struct xe_mii_frame *frame);
static int xe_mii_writereg(struct xe_softc *scp,
struct xe_mii_frame *frame);
static uint16_t xe_phy_readreg(struct xe_softc *scp, uint16_t reg);
static void xe_phy_writereg(struct xe_softc *scp, uint16_t reg,
uint16_t data);
/*
* Debugging functions
*/
static void xe_mii_dump(struct xe_softc *scp);
#if 0
static void xe_reg_dump(struct xe_softc *scp);
#endif
/*
* Debug logging levels - set with hw.xe.debug sysctl
* 0 = None
* 1 = More hardware details, probe/attach progress
* 2 = Most function calls, ioctls and media selection progress
* 3 = Everything - interrupts, packets in/out and multicast address setup
*/
#define XE_DEBUG
#ifdef XE_DEBUG
/* sysctl vars */
static SYSCTL_NODE(_hw, OID_AUTO, xe, CTLFLAG_RD, 0, "if_xe parameters");
int xe_debug = 0;
SYSCTL_INT(_hw_xe, OID_AUTO, debug, CTLFLAG_RW, &xe_debug, 0,
"if_xe debug level");
#define DEVPRINTF(level, arg) if (xe_debug >= (level)) device_printf arg
#define DPRINTF(level, arg) if (xe_debug >= (level)) printf arg
#define XE_MII_DUMP(scp) if (xe_debug >= 3) xe_mii_dump(scp)
#if 0
#define XE_REG_DUMP(scp) if (xe_debug >= 3) xe_reg_dump(scp)
#endif
#else
#define DEVPRINTF(level, arg)
#define DPRINTF(level, arg)
#define XE_MII_DUMP(scp)
#if 0
#define XE_REG_DUMP(scp)
#endif
#endif
/*
* Attach a device.
*/
int
xe_attach(device_t dev)
{
struct xe_softc *scp = device_get_softc(dev);
int err;
DEVPRINTF(2, (dev, "attach\n"));
/* Initialise stuff... */
scp->dev = dev;
scp->ifp = if_alloc(IFT_ETHER);
if (scp->ifp == NULL)
return (ENOSPC);
scp->ifm = &scp->ifmedia;
scp->autoneg_status = XE_AUTONEG_NONE;
mtx_init(&scp->lock, device_get_nameunit(dev), MTX_NETWORK_LOCK,
MTX_DEF);
callout_init_mtx(&scp->wdog_timer, &scp->lock, 0);
/* Initialise the ifnet structure */
scp->ifp->if_softc = scp;
if_initname(scp->ifp, device_get_name(dev), device_get_unit(dev));
scp->ifp->if_flags = (IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST);
scp->ifp->if_linkmib = &scp->mibdata;
scp->ifp->if_linkmiblen = sizeof(scp->mibdata);
scp->ifp->if_start = xe_start;
scp->ifp->if_ioctl = xe_ioctl;
scp->ifp->if_init = xe_init;
scp->ifp->if_baudrate = 100000000;
IFQ_SET_MAXLEN(&scp->ifp->if_snd, ifqmaxlen);
/* Initialise the ifmedia structure */
ifmedia_init(scp->ifm, 0, xe_media_change, xe_media_status);
callout_init_mtx(&scp->media_timer, &scp->lock, 0);
/* Add supported media types */
if (scp->mohawk) {
ifmedia_add(scp->ifm, IFM_ETHER|IFM_100_TX, 0, NULL);
ifmedia_add(scp->ifm, IFM_ETHER|IFM_10_T|IFM_FDX, 0, NULL);
ifmedia_add(scp->ifm, IFM_ETHER|IFM_10_T|IFM_HDX, 0, NULL);
}
ifmedia_add(scp->ifm, IFM_ETHER|IFM_10_T, 0, NULL);
if (scp->ce2)
ifmedia_add(scp->ifm, IFM_ETHER|IFM_10_2, 0, NULL);
ifmedia_add(scp->ifm, IFM_ETHER|IFM_AUTO, 0, NULL);
/* Default is to autoselect best supported media type */
ifmedia_set(scp->ifm, IFM_ETHER|IFM_AUTO);
/* Get the hardware into a known state */
XE_LOCK(scp);
xe_reset(scp);
XE_UNLOCK(scp);
/* Get hardware version numbers */
XE_SELECT_PAGE(4);
scp->version = XE_INB(XE_BOV);
if (scp->mohawk)
scp->srev = (XE_INB(XE_BOV) & 0x70) >> 4;
else
scp->srev = (XE_INB(XE_BOV) & 0x30) >> 4;
/* Print some useful information */
device_printf(dev, "version 0x%02x/0x%02x%s%s\n", scp->version,
scp->srev, scp->mohawk ? ", 100Mbps capable" : "",
scp->modem ? ", with modem" : "");
if (scp->mohawk) {
XE_SELECT_PAGE(0x10);
DEVPRINTF(1, (dev,
"DingoID=0x%04x, RevisionID=0x%04x, VendorID=0x%04x\n",
XE_INW(XE_DINGOID), XE_INW(XE_RevID), XE_INW(XE_VendorID)));
}
if (scp->ce2) {
XE_SELECT_PAGE(0x45);
DEVPRINTF(1, (dev, "CE2 version = 0x%02x\n", XE_INB(XE_REV)));
}
/* Attach the interface */
ether_ifattach(scp->ifp, scp->enaddr);
err = bus_setup_intr(dev, scp->irq_res, INTR_TYPE_NET | INTR_MPSAFE,
NULL, xe_intr, scp, &scp->intrhand);
if (err) {
ether_ifdetach(scp->ifp);
mtx_destroy(&scp->lock);
return (err);
}
/* Done */
return (0);
}
/*
* Complete hardware intitialisation and enable output. Exits without doing
* anything if there's no address assigned to the card, or if media selection
* is in progress (the latter implies we've already run this function).
*/
static void
xe_init(void *xscp)
{
struct xe_softc *scp = xscp;
XE_LOCK(scp);
xe_init_locked(scp);
XE_UNLOCK(scp);
}
static void
xe_init_locked(struct xe_softc *scp)
{
unsigned i;
if (scp->autoneg_status != XE_AUTONEG_NONE)
return;
DEVPRINTF(2, (scp->dev, "init\n"));
/* Reset transmitter flags */
scp->tx_queued = 0;
scp->tx_tpr = 0;
scp->tx_timeouts = 0;
scp->tx_thres = 64;
scp->tx_min = ETHER_MIN_LEN - ETHER_CRC_LEN;
scp->tx_timeout = 0;
/* Soft reset the card */
XE_SELECT_PAGE(0);
XE_OUTB(XE_CR, XE_CR_SOFT_RESET);
DELAY(40000);
XE_OUTB(XE_CR, 0);
DELAY(40000);
if (scp->mohawk) {
/*
* set GP1 and GP2 as outputs (bits 2 & 3)
* set GP1 low to power on the ML6692 (bit 0)
* set GP2 high to power on the 10Mhz chip (bit 1)
*/
XE_SELECT_PAGE(4);
XE_OUTB(XE_GPR0, XE_GPR0_GP2_SELECT | XE_GPR0_GP1_SELECT |
XE_GPR0_GP2_OUT);
}
/* Shut off interrupts */
xe_disable_intr(scp);
/* Wait for everything to wake up */
DELAY(500000);
/* Check for PHY */
if (scp->mohawk)
scp->phy_ok = xe_mii_init(scp);
/* Disable 'source insertion' (not sure what that means) */
XE_SELECT_PAGE(0x42);
XE_OUTB(XE_SWC0, XE_SWC0_NO_SRC_INSERT);
/* Set 8K/24K Tx/Rx buffer split */
if (scp->srev != 1) {
XE_SELECT_PAGE(2);
XE_OUTW(XE_RBS, 0x2000);
}
/* Enable early transmit mode on Mohawk/Dingo */
if (scp->mohawk) {
XE_SELECT_PAGE(0x03);
XE_OUTW(XE_TPT, scp->tx_thres);
XE_SELECT_PAGE(0x01);
XE_OUTB(XE_ECR, XE_INB(XE_ECR) | XE_ECR_EARLY_TX);
}
/* Put MAC address in first 'individual address' register */
XE_SELECT_PAGE(0x50);
for (i = 0; i < ETHER_ADDR_LEN; i++)
XE_OUTB(0x08 + i, IF_LLADDR(scp->ifp)[scp->mohawk ? 5 - i : i]);
/* Set up multicast addresses */
xe_set_multicast(scp);
/* Fix the receive data offset -- reset can leave it off-by-one */
XE_SELECT_PAGE(0);
XE_OUTW(XE_DO, 0x2000);
/* Set interrupt masks */
XE_SELECT_PAGE(1);
XE_OUTB(XE_IMR0, XE_IMR0_TX_PACKET | XE_IMR0_MAC_INTR |
XE_IMR0_RX_PACKET);
/* Set MAC interrupt masks */
XE_SELECT_PAGE(0x40);
XE_OUTB(XE_RX0Msk,
~(XE_RX0M_RX_OVERRUN | XE_RX0M_CRC_ERROR | XE_RX0M_ALIGN_ERROR |
XE_RX0M_LONG_PACKET));
XE_OUTB(XE_TX0Msk,
~(XE_TX0M_SQE_FAIL | XE_TX0M_LATE_COLLISION | XE_TX0M_TX_UNDERRUN |
XE_TX0M_16_COLLISIONS | XE_TX0M_NO_CARRIER));
/* Clear MAC status registers */
XE_SELECT_PAGE(0x40);
XE_OUTB(XE_RST0, 0x00);
XE_OUTB(XE_TXST0, 0x00);
/* Enable receiver and put MAC online */
XE_SELECT_PAGE(0x40);
XE_OUTB(XE_CMD0, XE_CMD0_RX_ENABLE|XE_CMD0_ONLINE);
/* Set up IMR, enable interrupts */
xe_enable_intr(scp);
/* Start media selection */
xe_setmedia(scp);
/* Enable output */
scp->ifp->if_drv_flags |= IFF_DRV_RUNNING;
scp->ifp->if_drv_flags &= ~IFF_DRV_OACTIVE;
callout_reset(&scp->wdog_timer, hz, xe_watchdog, scp);
}
/*
* Start output on interface. Should be called at splimp() priority. Check
* that the output is idle (ie, IFF_DRV_OACTIVE is not set) before calling this
* function. If media selection is in progress we set IFF_DRV_OACTIVE ourselves
* and return immediately.
*/
static void
xe_start(struct ifnet *ifp)
{
struct xe_softc *scp = ifp->if_softc;
XE_LOCK(scp);
xe_start_locked(ifp);
XE_UNLOCK(scp);
}
static void
xe_start_locked(struct ifnet *ifp)
{
struct xe_softc *scp = ifp->if_softc;
struct mbuf *mbp;
if (scp->autoneg_status != XE_AUTONEG_NONE) {
ifp->if_drv_flags |= IFF_DRV_OACTIVE;
return;
}
DEVPRINTF(3, (scp->dev, "start\n"));
/*
* Loop while there are packets to be sent, and space to send
* them.
*/
for (;;) {
/* Suck a packet off the send queue */
IF_DEQUEUE(&ifp->if_snd, mbp);
if (mbp == NULL) {
/*
* We are using the !OACTIVE flag to indicate
* to the outside world that we can accept an
* additional packet rather than that the
* transmitter is _actually_ active. Indeed,
* the transmitter may be active, but if we
* haven't filled all the buffers with data
* then we still want to accept more.
*/
ifp->if_drv_flags &= ~IFF_DRV_OACTIVE;
return;
}
if (xe_pio_write_packet(scp, mbp) != 0) {
/* Push the packet back onto the queue */
IF_PREPEND(&ifp->if_snd, mbp);
ifp->if_drv_flags |= IFF_DRV_OACTIVE;
return;
}
/* Tap off here if there is a bpf listener */
BPF_MTAP(ifp, mbp);
/* In case we don't hear from the card again... */
scp->tx_timeout = 5;
scp->tx_queued++;
m_freem(mbp);
}
}
/*
* Process an ioctl request. Adapted from the ed driver.
*/
static int
xe_ioctl(struct ifnet *ifp, u_long command, caddr_t data)
{
struct xe_softc *scp;
int error;
scp = ifp->if_softc;
error = 0;
switch (command) {
case SIOCSIFFLAGS:
DEVPRINTF(2, (scp->dev, "ioctl: SIOCSIFFLAGS: 0x%04x\n",
ifp->if_flags));
/*
* If the interface is marked up and stopped, then
* start it. If it is marked down and running, then
* stop it.
*/
XE_LOCK(scp);
if (ifp->if_flags & IFF_UP) {
if (!(ifp->if_drv_flags & IFF_DRV_RUNNING)) {
xe_reset(scp);
xe_init_locked(scp);
}
} else {
if (ifp->if_drv_flags & IFF_DRV_RUNNING)
xe_stop(scp);
}
/* handle changes to PROMISC/ALLMULTI flags */
xe_set_multicast(scp);
XE_UNLOCK(scp);
error = 0;
break;
case SIOCADDMULTI:
case SIOCDELMULTI:
DEVPRINTF(2, (scp->dev, "ioctl: SIOC{ADD,DEL}MULTI\n"));
/*
* Multicast list has (maybe) changed; set the
* hardware filters accordingly.
*/
XE_LOCK(scp);
xe_set_multicast(scp);
XE_UNLOCK(scp);
error = 0;
break;
case SIOCSIFMEDIA:
case SIOCGIFMEDIA:
DEVPRINTF(3, (scp->dev, "ioctl: bounce to ifmedia_ioctl\n"));
/*
* Someone wants to get/set media options.
*/
error = ifmedia_ioctl(ifp, (struct ifreq *)data, &scp->ifmedia,
command);
break;
default:
DEVPRINTF(3, (scp->dev, "ioctl: bounce to ether_ioctl\n"));
error = ether_ioctl(ifp, command, data);
}
return (error);
}
/*
* Card interrupt handler.
*
* This function is probably more complicated than it needs to be, as it
* attempts to deal with the case where multiple packets get sent between
* interrupts. This is especially annoying when working out the collision
* stats. Not sure whether this case ever really happens or not (maybe on a
* slow/heavily loaded machine?) so it's probably best to leave this like it
* is.
*
* Note that the crappy PIO used to get packets on and off the card means that
* you will spend a lot of time in this routine -- I can get my P150 to spend
* 90% of its time servicing interrupts if I really hammer the network. Could
* fix this, but then you'd start dropping/losing packets. The moral of this
* story? If you want good network performance _and_ some cycles left over to
* get your work done, don't buy a Xircom card. Or convince them to tell me
* how to do memory-mapped I/O :)
*/
static void
xe_txintr(struct xe_softc *scp, uint8_t txst1)
{
struct ifnet *ifp;
uint8_t tpr, sent, coll;
ifp = scp->ifp;
/* Update packet count, accounting for rollover */
tpr = XE_INB(XE_TPR);
sent = -scp->tx_tpr + tpr;
/* Update statistics if we actually sent anything */
if (sent > 0) {
coll = txst1 & XE_TXST1_RETRY_COUNT;
scp->tx_tpr = tpr;
scp->tx_queued -= sent;
if_inc_counter(ifp, IFCOUNTER_OPACKETS, sent);
if_inc_counter(ifp, IFCOUNTER_COLLISIONS, coll);
/*
* According to the Xircom manual, Dingo will
* sometimes manage to transmit a packet with
* triggering an interrupt. If this happens, we have
* sent > 1 and the collision count only reflects
* collisions on the last packet sent (the one that
* triggered the interrupt). Collision stats might
* therefore be a bit low, but there doesn't seem to
* be anything we can do about that.
*/
switch (coll) {
case 0:
break;
case 1:
scp->mibdata.dot3StatsSingleCollisionFrames++;
scp->mibdata.dot3StatsCollFrequencies[0]++;
break;
default:
scp->mibdata.dot3StatsMultipleCollisionFrames++;
scp->mibdata.dot3StatsCollFrequencies[coll-1]++;
}
}
scp->tx_timeout = 0;
ifp->if_drv_flags &= ~IFF_DRV_OACTIVE;
}
/* Handle most MAC interrupts */
static void
xe_macintr(struct xe_softc *scp, uint8_t rst0, uint8_t txst0, uint8_t txst1)
{
struct ifnet *ifp;
ifp = scp->ifp;
#if 0
/* Carrier sense lost -- only in 10Mbit HDX mode */
if (txst0 & XE_TXST0_NO_CARRIER || !(txst1 & XE_TXST1_LINK_STATUS)) {
/* XXX - Need to update media status here */
device_printf(scp->dev, "no carrier\n");
if_inc_counter(ifp, IFCOUNTER_OERRORS, 1);
scp->mibdata.dot3StatsCarrierSenseErrors++;
}
#endif
/* Excessive collisions -- try sending again */
if (txst0 & XE_TXST0_16_COLLISIONS) {
if_inc_counter(ifp, IFCOUNTER_COLLISIONS, 16);
if_inc_counter(ifp, IFCOUNTER_OERRORS, 1);
scp->mibdata.dot3StatsExcessiveCollisions++;
scp->mibdata.dot3StatsMultipleCollisionFrames++;
scp->mibdata.dot3StatsCollFrequencies[15]++;
XE_OUTB(XE_CR, XE_CR_RESTART_TX);
}
/* Transmit underrun -- increase early transmit threshold */
if (txst0 & XE_TXST0_TX_UNDERRUN && scp->mohawk) {
DEVPRINTF(1, (scp->dev, "transmit underrun"));
if (scp->tx_thres < ETHER_MAX_LEN) {
if ((scp->tx_thres += 64) > ETHER_MAX_LEN)
scp->tx_thres = ETHER_MAX_LEN;
DPRINTF(1, (": increasing transmit threshold to %u",
scp->tx_thres));
XE_SELECT_PAGE(0x3);
XE_OUTW(XE_TPT, scp->tx_thres);
XE_SELECT_PAGE(0x0);
}
DPRINTF(1, ("\n"));
if_inc_counter(ifp, IFCOUNTER_OERRORS, 1);
scp->mibdata.dot3StatsInternalMacTransmitErrors++;
}
/* Late collision -- just complain about it */
if (txst0 & XE_TXST0_LATE_COLLISION) {
device_printf(scp->dev, "late collision\n");
if_inc_counter(ifp, IFCOUNTER_OERRORS, 1);
scp->mibdata.dot3StatsLateCollisions++;
}
/* SQE test failure -- just complain about it */
if (txst0 & XE_TXST0_SQE_FAIL) {
device_printf(scp->dev, "SQE test failure\n");
if_inc_counter(ifp, IFCOUNTER_OERRORS, 1);
scp->mibdata.dot3StatsSQETestErrors++;
}
/* Packet too long -- what happens to these */
if (rst0 & XE_RST0_LONG_PACKET) {
device_printf(scp->dev, "received giant packet\n");
if_inc_counter(ifp, IFCOUNTER_IERRORS, 1);
scp->mibdata.dot3StatsFrameTooLongs++;
}
/* CRC error -- packet dropped */
if (rst0 & XE_RST0_CRC_ERROR) {
device_printf(scp->dev, "CRC error\n");
if_inc_counter(ifp, IFCOUNTER_IERRORS, 1);
scp->mibdata.dot3StatsFCSErrors++;
}
}
static void
xe_rxintr(struct xe_softc *scp, uint8_t rst0)
{
struct ifnet *ifp;
uint8_t esr, rsr;
ifp = scp->ifp;
/* Handle received packet(s) */
while ((esr = XE_INB(XE_ESR)) & XE_ESR_FULL_PACKET_RX) {
rsr = XE_INB(XE_RSR);
DEVPRINTF(3, (scp->dev, "intr: ESR=0x%02x, RSR=0x%02x\n", esr,
rsr));
/* Make sure packet is a good one */
if (rsr & XE_RSR_RX_OK) {
struct ether_header *ehp;
struct mbuf *mbp;
uint16_t len;
len = XE_INW(XE_RBC) - ETHER_CRC_LEN;
DEVPRINTF(3, (scp->dev, "intr: receive length = %d\n",
len));
if (len == 0) {
if_inc_counter(ifp, IFCOUNTER_IQDROPS, 1);
continue;
}
/*
* Allocate mbuf to hold received packet. If
* the mbuf header isn't big enough, we attach
* an mbuf cluster to hold the packet. Note
* the +=2 to align the packet data on a
* 32-bit boundary, and the +3 to allow for
* the possibility of reading one more byte
* than the actual packet length (we always
* read 16-bit words). XXX - Surely there's a
* better way to do this alignment?
*/
MGETHDR(mbp, M_NOWAIT, MT_DATA);
if (mbp == NULL) {
if_inc_counter(ifp, IFCOUNTER_IQDROPS, 1);
continue;
}
if (len + 3 > MHLEN) {
if (!(MCLGET(mbp, M_NOWAIT))) {
m_freem(mbp);
if_inc_counter(ifp, IFCOUNTER_IQDROPS, 1);
continue;
}
}
mbp->m_data += 2;
ehp = mtod(mbp, struct ether_header *);
/*
* Now get the packet in PIO mode, including
* the Ethernet header but omitting the
* trailing CRC.
*/
/*
* Work around a bug in CE2 cards. There
* seems to be a problem with duplicated and
* extraneous bytes in the receive buffer, but
* without any real documentation for the CE2
* it's hard to tell for sure. XXX - Needs
* testing on CE2 hardware
*/
if (scp->srev == 0) {
u_short rhs;
XE_SELECT_PAGE(5);
rhs = XE_INW(XE_RHSA);
XE_SELECT_PAGE(0);
rhs += 3; /* Skip control info */
if (rhs >= 0x8000)
rhs = 0;
if (rhs + len > 0x8000) {
int i;
for (i = 0; i < len; i++, rhs++) {
((char *)ehp)[i] =
XE_INB(XE_EDP);
if (rhs == 0x8000) {
rhs = 0;
i--;
}
}
} else
bus_read_multi_2(scp->port_res, XE_EDP,
(uint16_t *)ehp, (len + 1) >> 1);
} else
bus_read_multi_2(scp->port_res, XE_EDP,
(uint16_t *)ehp, (len + 1) >> 1);
/* Deliver packet to upper layers */
mbp->m_pkthdr.rcvif = ifp;
mbp->m_pkthdr.len = mbp->m_len = len;
XE_UNLOCK(scp);
(*ifp->if_input)(ifp, mbp);
XE_LOCK(scp);
if_inc_counter(ifp, IFCOUNTER_IPACKETS, 1);
} else if (rsr & XE_RSR_ALIGN_ERROR) {
/* Packet alignment error -- drop packet */
device_printf(scp->dev, "alignment error\n");
scp->mibdata.dot3StatsAlignmentErrors++;
if_inc_counter(ifp, IFCOUNTER_IERRORS, 1);
}
/* Skip to next packet, if there is one */
XE_OUTW(XE_DO, 0x8000);
}
/* Clear receiver overruns now we have some free buffer space */
if (rst0 & XE_RST0_RX_OVERRUN) {
DEVPRINTF(1, (scp->dev, "receive overrun\n"));
if_inc_counter(ifp, IFCOUNTER_IERRORS, 1);
scp->mibdata.dot3StatsInternalMacReceiveErrors++;
XE_OUTB(XE_CR, XE_CR_CLEAR_OVERRUN);
}
}
static void
xe_intr(void *xscp)
{
struct xe_softc *scp = (struct xe_softc *) xscp;
struct ifnet *ifp;
uint8_t psr, isr, rst0, txst0, txst1;
ifp = scp->ifp;
XE_LOCK(scp);
/* Disable interrupts */
if (scp->mohawk)
XE_OUTB(XE_CR, 0);
/* Cache current register page */
psr = XE_INB(XE_PR);
/* Read ISR to see what caused this interrupt */
while ((isr = XE_INB(XE_ISR)) != 0) {
/* 0xff might mean the card is no longer around */
if (isr == 0xff) {
DEVPRINTF(3, (scp->dev,
"intr: interrupt received for missing card?\n"));
break;
}
/* Read other status registers */
XE_SELECT_PAGE(0x40);
rst0 = XE_INB(XE_RST0);
XE_OUTB(XE_RST0, 0);
txst0 = XE_INB(XE_TXST0);
txst1 = XE_INB(XE_TXST1);
XE_OUTB(XE_TXST0, 0);
XE_OUTB(XE_TXST1, 0);
XE_SELECT_PAGE(0);
DEVPRINTF(3, (scp->dev,
"intr: ISR=0x%02x, RST=0x%02x, TXT=0x%02x%02x\n", isr,
rst0, txst1, txst0));
if (isr & XE_ISR_TX_PACKET)
xe_txintr(scp, txst1);
if (isr & XE_ISR_MAC_INTR)
xe_macintr(scp, rst0, txst0, txst1);
xe_rxintr(scp, rst0);
}
/* Restore saved page */
XE_SELECT_PAGE(psr);
/* Re-enable interrupts */
XE_OUTB(XE_CR, XE_CR_ENABLE_INTR);
XE_UNLOCK(scp);
}
/*
* Device timeout/watchdog routine. Called automatically if we queue a packet
* for transmission but don't get an interrupt within a specified timeout
* (usually 5 seconds). When this happens we assume the worst and reset the
* card.
*/
static void
xe_watchdog(void *arg)
{
struct xe_softc *scp = arg;
XE_ASSERT_LOCKED(scp);
if (scp->tx_timeout && --scp->tx_timeout == 0) {
device_printf(scp->dev, "watchdog timeout: resetting card\n");
scp->tx_timeouts++;
if_inc_counter(scp->ifp, IFCOUNTER_OERRORS, scp->tx_queued);
xe_stop(scp);
xe_reset(scp);
xe_init_locked(scp);
}
callout_reset(&scp->wdog_timer, hz, xe_watchdog, scp);
}
/*
* Change media selection.
*/
static int
xe_media_change(struct ifnet *ifp)
{
struct xe_softc *scp = ifp->if_softc;
DEVPRINTF(2, (scp->dev, "media_change\n"));
XE_LOCK(scp);
if (IFM_TYPE(scp->ifm->ifm_media) != IFM_ETHER) {
XE_UNLOCK(scp);
return(EINVAL);
}
/*
* Some card/media combos aren't always possible -- filter
* those out here.
*/
if ((IFM_SUBTYPE(scp->ifm->ifm_media) == IFM_AUTO ||
IFM_SUBTYPE(scp->ifm->ifm_media) == IFM_100_TX) && !scp->phy_ok) {
XE_UNLOCK(scp);
return (EINVAL);
}
xe_setmedia(scp);
XE_UNLOCK(scp);
return (0);
}
/*
* Return current media selection.
*/
static void
xe_media_status(struct ifnet *ifp, struct ifmediareq *mrp)
{
struct xe_softc *scp = ifp->if_softc;
DEVPRINTF(3, (scp->dev, "media_status\n"));
/* XXX - This is clearly wrong. Will fix once I have CE2 working */
XE_LOCK(scp);
mrp->ifm_status = IFM_AVALID | IFM_ACTIVE;
mrp->ifm_active = ((struct xe_softc *)ifp->if_softc)->media;
XE_UNLOCK(scp);
}
/*
* Select active media.
*/
static void
xe_setmedia(void *xscp)
{
struct xe_softc *scp = xscp;
uint16_t bmcr, bmsr, anar, lpar;
DEVPRINTF(2, (scp->dev, "setmedia\n"));
XE_ASSERT_LOCKED(scp);
/* Cancel any pending timeout */
callout_stop(&scp->media_timer);
xe_disable_intr(scp);
/* Select media */
scp->media = IFM_ETHER;
switch (IFM_SUBTYPE(scp->ifm->ifm_media)) {
case IFM_AUTO: /* Autoselect media */
scp->media = IFM_ETHER|IFM_AUTO;
/*
* Autoselection is really awful. It goes something like this:
*
* Wait until the transmitter goes idle (2sec timeout).
* Reset card
* IF a 100Mbit PHY exists
* Start NWAY autonegotiation (3.5sec timeout)
* IF that succeeds
* Select 100baseTX or 10baseT, whichever was detected
* ELSE
* Reset card
* IF a 100Mbit PHY exists
* Try to force a 100baseTX link (3sec timeout)
* IF that succeeds
* Select 100baseTX
* ELSE
* Disable the PHY
* ENDIF
* ENDIF
* ENDIF
* ENDIF
* IF nothing selected so far
* IF a 100Mbit PHY exists
* Select 10baseT
* ELSE
* Select 10baseT or 10base2, whichever is connected
* ENDIF
* ENDIF
*/
switch (scp->autoneg_status) {
case XE_AUTONEG_NONE:
DEVPRINTF(2, (scp->dev,
"Waiting for idle transmitter\n"));
scp->ifp->if_drv_flags |= IFF_DRV_OACTIVE;
scp->autoneg_status = XE_AUTONEG_WAITING;
/* FALL THROUGH */
case XE_AUTONEG_WAITING:
if (scp->tx_queued != 0) {
callout_reset(&scp->media_timer, hz / 2,
xe_setmedia, scp);
return;
}
if (scp->phy_ok) {
DEVPRINTF(2, (scp->dev,
"Starting autonegotiation\n"));
bmcr = xe_phy_readreg(scp, PHY_BMCR);
bmcr &= ~(PHY_BMCR_AUTONEGENBL);
xe_phy_writereg(scp, PHY_BMCR, bmcr);
anar = xe_phy_readreg(scp, PHY_ANAR);
anar &= ~(PHY_ANAR_100BT4 |
PHY_ANAR_100BTXFULL | PHY_ANAR_10BTFULL);
anar |= PHY_ANAR_100BTXHALF | PHY_ANAR_10BTHALF;
xe_phy_writereg(scp, PHY_ANAR, anar);
bmcr |= PHY_BMCR_AUTONEGENBL |
PHY_BMCR_AUTONEGRSTR;
xe_phy_writereg(scp, PHY_BMCR, bmcr);
scp->autoneg_status = XE_AUTONEG_STARTED;
callout_reset(&scp->media_timer, hz * 7/2,
xe_setmedia, scp);
return;
} else {
scp->autoneg_status = XE_AUTONEG_FAIL;
}
break;
case XE_AUTONEG_STARTED:
bmsr = xe_phy_readreg(scp, PHY_BMSR);
lpar = xe_phy_readreg(scp, PHY_LPAR);
if (bmsr & (PHY_BMSR_AUTONEGCOMP | PHY_BMSR_LINKSTAT)) {
DEVPRINTF(2, (scp->dev,
"Autonegotiation complete!\n"));
/*
* XXX - Shouldn't have to do this,
* but (on my hub at least) the
* transmitter won't work after a
* successful autoneg. So we see what
* the negotiation result was and
* force that mode. I'm sure there is
* an easy fix for this.
*/
if (lpar & PHY_LPAR_100BTXHALF) {
xe_phy_writereg(scp, PHY_BMCR,
PHY_BMCR_SPEEDSEL);
XE_MII_DUMP(scp);
XE_SELECT_PAGE(2);
XE_OUTB(XE_MSR, XE_INB(XE_MSR) | 0x08);
scp->media = IFM_ETHER | IFM_100_TX;
scp->autoneg_status = XE_AUTONEG_NONE;
} else {
/*
* XXX - Bit of a hack going
* on in here. This is
* derived from Ken Hughes
* patch to the Linux driver
* to make it work with 10Mbit
* _autonegotiated_ links on
* CE3B cards. What's a CE3B
* and how's it differ from a
* plain CE3? these are the
* things we need to find out.
*/
xe_phy_writereg(scp, PHY_BMCR, 0x0000);
XE_SELECT_PAGE(2);
/* BEGIN HACK */
XE_OUTB(XE_MSR, XE_INB(XE_MSR) | 0x08);
XE_SELECT_PAGE(0x42);
XE_OUTB(XE_SWC1, 0x80);
scp->media = IFM_ETHER | IFM_10_T;
scp->autoneg_status = XE_AUTONEG_NONE;
/* END HACK */
#if 0
/* Display PHY? */
XE_OUTB(XE_MSR, XE_INB(XE_MSR) & ~0x08);
scp->autoneg_status = XE_AUTONEG_FAIL;
#endif
}
} else {
DEVPRINTF(2, (scp->dev,
"Autonegotiation failed; trying 100baseTX\n"));
XE_MII_DUMP(scp);
if (scp->phy_ok) {
xe_phy_writereg(scp, PHY_BMCR,
PHY_BMCR_SPEEDSEL);
scp->autoneg_status = XE_AUTONEG_100TX;
callout_reset(&scp->media_timer, hz * 3,
xe_setmedia, scp);
return;
} else {
scp->autoneg_status = XE_AUTONEG_FAIL;
}
}
break;
case XE_AUTONEG_100TX:
(void)xe_phy_readreg(scp, PHY_BMSR);
bmsr = xe_phy_readreg(scp, PHY_BMSR);
if (bmsr & PHY_BMSR_LINKSTAT) {
DEVPRINTF(2, (scp->dev,
"Got 100baseTX link!\n"));
XE_MII_DUMP(scp);
XE_SELECT_PAGE(2);
XE_OUTB(XE_MSR, XE_INB(XE_MSR) | 0x08);
scp->media = IFM_ETHER | IFM_100_TX;
scp->autoneg_status = XE_AUTONEG_NONE;
} else {
DEVPRINTF(2, (scp->dev,
"Autonegotiation failed; disabling PHY\n"));
XE_MII_DUMP(scp);
xe_phy_writereg(scp, PHY_BMCR, 0x0000);
XE_SELECT_PAGE(2);
/* Disable PHY? */
XE_OUTB(XE_MSR, XE_INB(XE_MSR) & ~0x08);
scp->autoneg_status = XE_AUTONEG_FAIL;
}
break;
}
/*
* If we got down here _and_ autoneg_status is
* XE_AUTONEG_FAIL, then either autonegotiation
* failed, or never got started to begin with. In
* either case, select a suitable 10Mbit media and
* hope it works. We don't need to reset the card
* again, since it will have been done already by the
* big switch above.
*/
if (scp->autoneg_status == XE_AUTONEG_FAIL) {
DEVPRINTF(2, (scp->dev, "Selecting 10baseX\n"));
if (scp->mohawk) {
XE_SELECT_PAGE(0x42);
XE_OUTB(XE_SWC1, 0x80);
scp->media = IFM_ETHER | IFM_10_T;
scp->autoneg_status = XE_AUTONEG_NONE;
} else {
XE_SELECT_PAGE(4);
XE_OUTB(XE_GPR0, 4);
DELAY(50000);
XE_SELECT_PAGE(0x42);
XE_OUTB(XE_SWC1,
(XE_INB(XE_ESR) & XE_ESR_MEDIA_SELECT) ?
0x80 : 0xc0);
scp->media = IFM_ETHER | ((XE_INB(XE_ESR) &
XE_ESR_MEDIA_SELECT) ? IFM_10_T : IFM_10_2);
scp->autoneg_status = XE_AUTONEG_NONE;
}
}
break;
/*
* If a specific media has been requested, we just reset the
* card and select it (one small exception -- if 100baseTX is
* requested but there is no PHY, we fall back to 10baseT
* operation).
*/
case IFM_100_TX: /* Force 100baseTX */
if (scp->phy_ok) {
DEVPRINTF(2, (scp->dev, "Selecting 100baseTX\n"));
XE_SELECT_PAGE(0x42);
XE_OUTB(XE_SWC1, 0);
xe_phy_writereg(scp, PHY_BMCR, PHY_BMCR_SPEEDSEL);
XE_SELECT_PAGE(2);
XE_OUTB(XE_MSR, XE_INB(XE_MSR) | 0x08);
scp->media |= IFM_100_TX;
break;
}
/* FALLTHROUGH */
case IFM_10_T: /* Force 10baseT */
DEVPRINTF(2, (scp->dev, "Selecting 10baseT\n"));
if (scp->phy_ok) {
xe_phy_writereg(scp, PHY_BMCR, 0x0000);
XE_SELECT_PAGE(2);
/* Disable PHY */
XE_OUTB(XE_MSR, XE_INB(XE_MSR) & ~0x08);
}
XE_SELECT_PAGE(0x42);
XE_OUTB(XE_SWC1, 0x80);
scp->media |= IFM_10_T;
break;
case IFM_10_2:
DEVPRINTF(2, (scp->dev, "Selecting 10base2\n"));
XE_SELECT_PAGE(0x42);
XE_OUTB(XE_SWC1, 0xc0);
scp->media |= IFM_10_2;
break;
}
/*
* Finally, the LEDs are set to match whatever media was
* chosen and the transmitter is unblocked.
*/
DEVPRINTF(2, (scp->dev, "Setting LEDs\n"));
XE_SELECT_PAGE(2);
switch (IFM_SUBTYPE(scp->media)) {
case IFM_100_TX:
case IFM_10_T:
XE_OUTB(XE_LED, 0x3b);
if (scp->dingo)
XE_OUTB(0x0b, 0x04); /* 100Mbit LED */
break;
case IFM_10_2:
XE_OUTB(XE_LED, 0x3a);
break;
}
/* Restart output? */
xe_enable_intr(scp);
scp->ifp->if_drv_flags &= ~IFF_DRV_OACTIVE;
xe_start_locked(scp->ifp);
}
/*
* Hard reset (power cycle) the card.
*/
static void
xe_reset(struct xe_softc *scp)
{
DEVPRINTF(2, (scp->dev, "reset\n"));
XE_ASSERT_LOCKED(scp);
/* Power down */
XE_SELECT_PAGE(4);
XE_OUTB(XE_GPR1, 0);
DELAY(40000);
/* Power up again */
if (scp->mohawk)
XE_OUTB(XE_GPR1, XE_GPR1_POWER_DOWN);
else
XE_OUTB(XE_GPR1, XE_GPR1_POWER_DOWN | XE_GPR1_AIC);
DELAY(40000);
XE_SELECT_PAGE(0);
}
/*
* Take interface offline. This is done by powering down the device, which I
* assume means just shutting down the transceiver and Ethernet logic. This
* requires a _hard_ reset to recover from, as we need to power up again.
*/
void
xe_stop(struct xe_softc *scp)
{
DEVPRINTF(2, (scp->dev, "stop\n"));
XE_ASSERT_LOCKED(scp);
/*
* Shut off interrupts.
*/
xe_disable_intr(scp);
/*
* Power down.
*/
XE_SELECT_PAGE(4);
XE_OUTB(XE_GPR1, 0);
XE_SELECT_PAGE(0);
if (scp->mohawk) {
/*
* set GP1 and GP2 as outputs (bits 2 & 3)
* set GP1 high to power on the ML6692 (bit 0)
* set GP2 low to power on the 10Mhz chip (bit 1)
*/
XE_SELECT_PAGE(4);
XE_OUTB(XE_GPR0, XE_GPR0_GP2_SELECT | XE_GPR0_GP1_SELECT |
XE_GPR0_GP1_OUT);
}
/*
* ~IFF_DRV_RUNNING == interface down.
*/
scp->ifp->if_drv_flags &= ~IFF_DRV_RUNNING;
scp->ifp->if_drv_flags &= ~IFF_DRV_OACTIVE;
scp->tx_timeout = 0;
callout_stop(&scp->wdog_timer);
callout_stop(&scp->media_timer);
}
/*
* Enable interrupts from the card.
*/
static void
xe_enable_intr(struct xe_softc *scp)
{
DEVPRINTF(2, (scp->dev, "enable_intr\n"));
XE_SELECT_PAGE(0);
XE_OUTB(XE_CR, XE_CR_ENABLE_INTR); /* Enable interrupts */
if (scp->modem && !scp->dingo) { /* This bit is just magic */
if (!(XE_INB(0x10) & 0x01)) {
XE_OUTB(0x10, 0x11); /* Unmask master int enable */
}
}
}
/*
* Disable interrupts from the card.
*/
static void
xe_disable_intr(struct xe_softc *scp)
{
DEVPRINTF(2, (scp->dev, "disable_intr\n"));
XE_SELECT_PAGE(0);
XE_OUTB(XE_CR, 0); /* Disable interrupts */
if (scp->modem && !scp->dingo) { /* More magic */
XE_OUTB(0x10, 0x10); /* Mask the master int enable */
}
}
/*
* Set up multicast filter and promiscuous modes.
*/
static void
xe_set_multicast(struct xe_softc *scp)
{
struct ifnet *ifp;
struct ifmultiaddr *maddr;
unsigned count, i;
DEVPRINTF(2, (scp->dev, "set_multicast\n"));
ifp = scp->ifp;
XE_SELECT_PAGE(0x42);
/* Handle PROMISC flag */
if (ifp->if_flags & IFF_PROMISC) {
XE_OUTB(XE_SWC1, XE_INB(XE_SWC1) | XE_SWC1_PROMISCUOUS);
return;
} else
XE_OUTB(XE_SWC1, XE_INB(XE_SWC1) & ~XE_SWC1_PROMISCUOUS);
/* Handle ALLMULTI flag */
if (ifp->if_flags & IFF_ALLMULTI) {
XE_OUTB(XE_SWC1, XE_INB(XE_SWC1) | XE_SWC1_ALLMULTI);
return;
} else
XE_OUTB(XE_SWC1, XE_INB(XE_SWC1) & ~XE_SWC1_ALLMULTI);
/* Iterate over multicast address list */
count = 0;
if_maddr_rlock(ifp);
TAILQ_FOREACH(maddr, &ifp->if_multiaddrs, ifma_link) {
if (maddr->ifma_addr->sa_family != AF_LINK)
continue;
count++;
if (count < 10)
/*
* First 9 use Individual Addresses for exact
* matching.
*/
xe_set_addr(scp,
LLADDR((struct sockaddr_dl *)maddr->ifma_addr),
count);
else if (scp->mohawk)
/* Use hash filter on Mohawk and Dingo */
xe_mchash(scp,
LLADDR((struct sockaddr_dl *)maddr->ifma_addr));
else
/* Nowhere else to put them on CE2 */
break;
}
if_maddr_runlock(ifp);
DEVPRINTF(2, (scp->dev, "set_multicast: count = %u\n", count));
/* Now do some cleanup and enable multicast handling as needed */
if (count == 0) {
/* Disable all multicast handling */
XE_SELECT_PAGE(0x42);
XE_OUTB(XE_SWC1, XE_INB(XE_SWC1) &
~(XE_SWC1_IA_ENABLE | XE_SWC1_ALLMULTI));
if (scp->mohawk) {
XE_SELECT_PAGE(0x02);
XE_OUTB(XE_MSR, XE_INB(XE_MSR) & ~XE_MSR_HASH_TABLE);
}
} else if (count < 10) {
/*
* Full in any unused Individual Addresses with our
* MAC address.
*/
for (i = count + 1; i < 10; i++)
xe_set_addr(scp, IF_LLADDR(scp->ifp), i);
/* Enable Individual Address matching only */
XE_SELECT_PAGE(0x42);
XE_OUTB(XE_SWC1, (XE_INB(XE_SWC1) & ~XE_SWC1_ALLMULTI) |
XE_SWC1_IA_ENABLE);
if (scp->mohawk) {
XE_SELECT_PAGE(0x02);
XE_OUTB(XE_MSR, XE_INB(XE_MSR) & ~XE_MSR_HASH_TABLE);
}
} else if (scp->mohawk) {
/* Check whether hash table is full */
XE_SELECT_PAGE(0x58);
for (i = 0x08; i < 0x10; i++)
if (XE_INB(i) != 0xff)
break;
if (i == 0x10) {
/*
* Hash table full - enable
* promiscuous multicast matching
*/
XE_SELECT_PAGE(0x42);
XE_OUTB(XE_SWC1, (XE_INB(XE_SWC1) &
~XE_SWC1_IA_ENABLE) | XE_SWC1_ALLMULTI);
XE_SELECT_PAGE(0x02);
XE_OUTB(XE_MSR, XE_INB(XE_MSR) & ~XE_MSR_HASH_TABLE);
} else {
/* Enable hash table and Individual Address matching */
XE_SELECT_PAGE(0x42);
XE_OUTB(XE_SWC1, (XE_INB(XE_SWC1) & ~XE_SWC1_ALLMULTI) |
XE_SWC1_IA_ENABLE);
XE_SELECT_PAGE(0x02);
XE_OUTB(XE_MSR, XE_INB(XE_MSR) | XE_MSR_HASH_TABLE);
}
} else {
/* Enable promiscuous multicast matching */
XE_SELECT_PAGE(0x42);
XE_OUTB(XE_SWC1, (XE_INB(XE_SWC1) & ~XE_SWC1_IA_ENABLE) |
XE_SWC1_ALLMULTI);
}
XE_SELECT_PAGE(0);
}
/*
* Copy the Ethernet multicast address in addr to the on-chip registers for
* Individual Address idx. Assumes that addr is really a multicast address
* and that idx > 0 (slot 0 is always used for the card MAC address).
*/
static void
xe_set_addr(struct xe_softc *scp, uint8_t* addr, unsigned idx)
{
uint8_t page, reg;
unsigned i;
/*
* Individual Addresses are stored in registers 8-F of pages
* 0x50-0x57. IA1 therefore starts at register 0xE on page
* 0x50. The expressions below compute the starting page and
* register for any IA index > 0.
*/
--idx;
page = 0x50 + idx % 4 + idx / 4 * 3;
reg = 0x0e - 2 * (idx % 4);
DEVPRINTF(3, (scp->dev,
"set_addr: idx = %u, page = 0x%02x, reg = 0x%02x\n", idx + 1, page,
reg));
/*
* Copy the IA bytes. Note that the byte order is reversed
* for Mohawk and Dingo wrt. CE2 hardware.
*/
XE_SELECT_PAGE(page);
for (i = 0; i < ETHER_ADDR_LEN; i++) {
if (i > 0) {
DPRINTF(3, (":%02x", addr[i]));
} else {
DEVPRINTF(3, (scp->dev, "set_addr: %02x", addr[0]));
}
XE_OUTB(reg, addr[scp->mohawk ? 5 - i : i]);
if (++reg == 0x10) {
reg = 0x08;
XE_SELECT_PAGE(++page);
}
}
DPRINTF(3, ("\n"));
}
/*
* Set the appropriate bit in the multicast hash table for the supplied
* Ethernet multicast address addr. Assumes that addr is really a multicast
* address.
*/
static void
xe_mchash(struct xe_softc* scp, const uint8_t *addr)
{
int bit;
uint8_t byte, hash;
hash = ether_crc32_le(addr, ETHER_ADDR_LEN) & 0x3F;
/*
* Top 3 bits of hash give register - 8, bottom 3 give bit
* within register.
*/
byte = hash >> 3 | 0x08;
bit = 0x01 << (hash & 0x07);
DEVPRINTF(3, (scp->dev,
"set_hash: hash = 0x%02x, byte = 0x%02x, bit = 0x%02x\n", hash,
byte, bit));
XE_SELECT_PAGE(0x58);
XE_OUTB(byte, XE_INB(byte) | bit);
}
/*
* Write an outgoing packet to the card using programmed I/O.
*/
static int
xe_pio_write_packet(struct xe_softc *scp, struct mbuf *mbp)
{
unsigned len, pad;
unsigned char wantbyte;
uint8_t *data;
uint8_t savebyte[2];
/* Get total packet length */
if (mbp->m_flags & M_PKTHDR)
len = mbp->m_pkthdr.len;
else {
struct mbuf* mbp2 = mbp;
for (len = 0; mbp2 != NULL;
len += mbp2->m_len, mbp2 = mbp2->m_next);
}
DEVPRINTF(3, (scp->dev, "pio_write_packet: len = %u\n", len));
/* Packets < minimum length may need to be padded out */
pad = 0;
if (len < scp->tx_min) {
pad = scp->tx_min - len;
len = scp->tx_min;
}
/* Check transmit buffer space */
XE_SELECT_PAGE(0);
XE_OUTW(XE_TRS, len + 2); /* Only effective on rev. 1 CE2 cards */
if ((XE_INW(XE_TSO) & 0x7fff) <= len + 2)
return (1);
/* Send packet length to card */
XE_OUTW(XE_EDP, len);
/*
* Write packet to card using PIO (code stolen from the ed driver)
*/
wantbyte = 0;
while (mbp != NULL) {
len = mbp->m_len;
if (len > 0) {
data = mtod(mbp, caddr_t);
if (wantbyte) { /* Finish the last word */
savebyte[1] = *data;
XE_OUTW(XE_EDP, *(u_short *)savebyte);
data++;
len--;
wantbyte = 0;
}
if (len > 1) { /* Output contiguous words */
bus_write_multi_2(scp->port_res, XE_EDP,
(uint16_t *)data, len >> 1);
data += len & ~1;
len &= 1;
}
if (len == 1) { /* Save last byte, if needed */
savebyte[0] = *data;
wantbyte = 1;
}
}
mbp = mbp->m_next;
}
/*
* Send last byte of odd-length packets
*/
if (wantbyte)
XE_OUTB(XE_EDP, savebyte[0]);
/*
* Can just tell CE3 cards to send; short packets will be
* padded out with random cruft automatically. For CE2,
* manually pad the packet with garbage; it will be sent when
* the required number of bytes have been delivered to the
* card.
*/
if (scp->mohawk)
XE_OUTB(XE_CR, XE_CR_TX_PACKET | XE_CR_RESTART_TX |
XE_CR_ENABLE_INTR);
else if (pad > 0) {
if (pad & 0x01)
XE_OUTB(XE_EDP, 0xaa);
pad >>= 1;
while (pad > 0) {
XE_OUTW(XE_EDP, 0xdead);
pad--;
}
}
return (0);
}
/**************************************************************
* *
* M I I F U N C T I O N S *
* *
**************************************************************/
/*
* Alternative MII/PHY handling code adapted from the xl driver. It doesn't
* seem to work any better than the xirc2_ps stuff, but it's cleaner code.
* XXX - this stuff shouldn't be here. It should all be abstracted off to
* XXX - some kind of common MII-handling code, shared by all drivers. But
* XXX - that's a whole other mission.
*/
#define XE_MII_SET(x) XE_OUTB(XE_GPR2, (XE_INB(XE_GPR2) | 0x04) | (x))
#define XE_MII_CLR(x) XE_OUTB(XE_GPR2, (XE_INB(XE_GPR2) | 0x04) & ~(x))
/*
* Sync the PHYs by setting data bit and strobing the clock 32 times.
*/
static void
xe_mii_sync(struct xe_softc *scp)
{
int i;
XE_SELECT_PAGE(2);
XE_MII_SET(XE_MII_DIR|XE_MII_WRD);
for (i = 0; i < 32; i++) {
XE_MII_SET(XE_MII_CLK);
DELAY(1);
XE_MII_CLR(XE_MII_CLK);
DELAY(1);
}
}
/*
* Look for a MII-compliant PHY. If we find one, reset it.
*/
static int
xe_mii_init(struct xe_softc *scp)
{
uint16_t status;
status = xe_phy_readreg(scp, PHY_BMSR);
if ((status & 0xff00) != 0x7800) {
DEVPRINTF(2, (scp->dev, "no PHY found, %0x\n", status));
return (0);
} else {
DEVPRINTF(2, (scp->dev, "PHY OK!\n"));
/* Reset the PHY */
xe_phy_writereg(scp, PHY_BMCR, PHY_BMCR_RESET);
DELAY(500);
while(xe_phy_readreg(scp, PHY_BMCR) & PHY_BMCR_RESET)
; /* nothing */
XE_MII_DUMP(scp);
return (1);
}
}
/*
* Clock a series of bits through the MII.
*/
static void
xe_mii_send(struct xe_softc *scp, uint32_t bits, int cnt)
{
int i;
XE_SELECT_PAGE(2);
XE_MII_CLR(XE_MII_CLK);
for (i = (0x1 << (cnt - 1)); i; i >>= 1) {
if (bits & i) {
XE_MII_SET(XE_MII_WRD);
} else {
XE_MII_CLR(XE_MII_WRD);
}
DELAY(1);
XE_MII_CLR(XE_MII_CLK);
DELAY(1);
XE_MII_SET(XE_MII_CLK);
}
}
/*
* Read an PHY register through the MII.
*/
static int
xe_mii_readreg(struct xe_softc *scp, struct xe_mii_frame *frame)
{
int i, ack;
XE_ASSERT_LOCKED(scp);
/*
* Set up frame for RX.
*/
frame->mii_stdelim = XE_MII_STARTDELIM;
frame->mii_opcode = XE_MII_READOP;
frame->mii_turnaround = 0;
frame->mii_data = 0;
XE_SELECT_PAGE(2);
XE_OUTB(XE_GPR2, 0);
/*
* Turn on data xmit.
*/
XE_MII_SET(XE_MII_DIR);
xe_mii_sync(scp);
/*
* Send command/address info.
*/
xe_mii_send(scp, frame->mii_stdelim, 2);
xe_mii_send(scp, frame->mii_opcode, 2);
xe_mii_send(scp, frame->mii_phyaddr, 5);
xe_mii_send(scp, frame->mii_regaddr, 5);
/* Idle bit */
XE_MII_CLR((XE_MII_CLK|XE_MII_WRD));
DELAY(1);
XE_MII_SET(XE_MII_CLK);
DELAY(1);
/* Turn off xmit. */
XE_MII_CLR(XE_MII_DIR);
/* Check for ack */
XE_MII_CLR(XE_MII_CLK);
DELAY(1);
ack = XE_INB(XE_GPR2) & XE_MII_RDD;
XE_MII_SET(XE_MII_CLK);
DELAY(1);
/*
* Now try reading data bits. If the ack failed, we still
* need to clock through 16 cycles to keep the PHY(s) in sync.
*/
if (ack) {
for(i = 0; i < 16; i++) {
XE_MII_CLR(XE_MII_CLK);
DELAY(1);
XE_MII_SET(XE_MII_CLK);
DELAY(1);
}
goto fail;
}
for (i = 0x8000; i; i >>= 1) {
XE_MII_CLR(XE_MII_CLK);
DELAY(1);
if (!ack) {
if (XE_INB(XE_GPR2) & XE_MII_RDD)
frame->mii_data |= i;
DELAY(1);
}
XE_MII_SET(XE_MII_CLK);
DELAY(1);
}
fail:
XE_MII_CLR(XE_MII_CLK);
DELAY(1);
XE_MII_SET(XE_MII_CLK);
DELAY(1);
if (ack)
return(1);
return(0);
}
/*
* Write to a PHY register through the MII.
*/
static int
xe_mii_writereg(struct xe_softc *scp, struct xe_mii_frame *frame)
{
XE_ASSERT_LOCKED(scp);
/*
* Set up frame for TX.
*/
frame->mii_stdelim = XE_MII_STARTDELIM;
frame->mii_opcode = XE_MII_WRITEOP;
frame->mii_turnaround = XE_MII_TURNAROUND;
XE_SELECT_PAGE(2);
/*
* Turn on data output.
*/
XE_MII_SET(XE_MII_DIR);
xe_mii_sync(scp);
xe_mii_send(scp, frame->mii_stdelim, 2);
xe_mii_send(scp, frame->mii_opcode, 2);
xe_mii_send(scp, frame->mii_phyaddr, 5);
xe_mii_send(scp, frame->mii_regaddr, 5);
xe_mii_send(scp, frame->mii_turnaround, 2);
xe_mii_send(scp, frame->mii_data, 16);
/* Idle bit. */
XE_MII_SET(XE_MII_CLK);
DELAY(1);
XE_MII_CLR(XE_MII_CLK);
DELAY(1);
/*
* Turn off xmit.
*/
XE_MII_CLR(XE_MII_DIR);
return(0);
}
/*
* Read a register from the PHY.
*/
static uint16_t
xe_phy_readreg(struct xe_softc *scp, uint16_t reg)
{
struct xe_mii_frame frame;
bzero((char *)&frame, sizeof(frame));
frame.mii_phyaddr = 0;
frame.mii_regaddr = reg;
xe_mii_readreg(scp, &frame);
return (frame.mii_data);
}
/*
* Write to a PHY register.
*/
static void
xe_phy_writereg(struct xe_softc *scp, uint16_t reg, uint16_t data)
{
struct xe_mii_frame frame;
bzero((char *)&frame, sizeof(frame));
frame.mii_phyaddr = 0;
frame.mii_regaddr = reg;
frame.mii_data = data;
xe_mii_writereg(scp, &frame);
}
/*
* A bit of debugging code.
*/
static void
xe_mii_dump(struct xe_softc *scp)
{
int i;
device_printf(scp->dev, "MII registers: ");
for (i = 0; i < 2; i++) {
printf(" %d:%04x", i, xe_phy_readreg(scp, i));
}
for (i = 4; i < 7; i++) {
printf(" %d:%04x", i, xe_phy_readreg(scp, i));
}
printf("\n");
}
#if 0
void
xe_reg_dump(struct xe_softc *scp)
{
int page, i;
device_printf(scp->dev, "Common registers: ");
for (i = 0; i < 8; i++) {
printf(" %2.2x", XE_INB(i));
}
printf("\n");
for (page = 0; page <= 8; page++) {
device_printf(scp->dev, "Register page %2.2x: ", page);
XE_SELECT_PAGE(page);
for (i = 8; i < 16; i++) {
printf(" %2.2x", XE_INB(i));
}
printf("\n");
}
for (page = 0x10; page < 0x5f; page++) {
if ((page >= 0x11 && page <= 0x3f) ||
(page == 0x41) ||
(page >= 0x43 && page <= 0x4f) ||
(page >= 0x59))
continue;
device_printf(scp->dev, "Register page %2.2x: ", page);
XE_SELECT_PAGE(page);
for (i = 8; i < 16; i++) {
printf(" %2.2x", XE_INB(i));
}
printf("\n");
}
}
#endif
int
xe_activate(device_t dev)
{
struct xe_softc *sc = device_get_softc(dev);
int start, i;
DEVPRINTF(2, (dev, "activate\n"));
if (!sc->modem) {
sc->port_rid = 0; /* 0 is managed by pccard */
sc->port_res = bus_alloc_resource(dev, SYS_RES_IOPORT,
&sc->port_rid, 0ul, ~0ul, 16, RF_ACTIVE);
} else if (sc->dingo) {
/*
* Find a 16 byte aligned ioport for the card.
*/
DEVPRINTF(1, (dev, "Finding an aligned port for RealPort\n"));
sc->port_rid = 1; /* 0 is managed by pccard */
start = 0x100;
do {
sc->port_res = bus_alloc_resource(dev, SYS_RES_IOPORT,
&sc->port_rid, start, 0x3ff, 16, RF_ACTIVE);
if (sc->port_res == NULL)
break;
if ((rman_get_start(sc->port_res) & 0xf) == 0)
break;
bus_release_resource(dev, SYS_RES_IOPORT, sc->port_rid,
sc->port_res);
start = (rman_get_start(sc->port_res) + 15) & ~0xf;
} while (1);
DEVPRINTF(1, (dev, "RealPort port 0x%0lx, size 0x%0lx\n",
bus_get_resource_start(dev, SYS_RES_IOPORT, sc->port_rid),
bus_get_resource_count(dev, SYS_RES_IOPORT, sc->port_rid)));
} else if (sc->ce2) {
/*
* Find contiguous I/O port for the Ethernet function
* on CEM2 and CEM3 cards. We allocate window 0
* wherever pccard has decided it should be, then find
* an available window adjacent to it for the second
* function. Not sure that both windows are actually
* needed.
*/
DEVPRINTF(1, (dev, "Finding I/O port for CEM2/CEM3\n"));
sc->ce2_port_rid = 0; /* 0 is managed by pccard */
sc->ce2_port_res = bus_alloc_resource(dev, SYS_RES_IOPORT,
&sc->ce2_port_rid, 0ul, ~0ul, 8, RF_ACTIVE);
if (sc->ce2_port_res == NULL) {
DEVPRINTF(1, (dev,
"Cannot allocate I/O port for modem\n"));
xe_deactivate(dev);
return (ENOMEM);
}
sc->port_rid = 1;
start = bus_get_resource_start(dev, SYS_RES_IOPORT,
sc->ce2_port_rid);
for (i = 0; i < 2; i++) {
start += (i == 0 ? 8 : -24);
sc->port_res = bus_alloc_resource(dev, SYS_RES_IOPORT,
&sc->port_rid, start, start + 15, 16, RF_ACTIVE);
if (sc->port_res == NULL)
continue;
if (bus_get_resource_start(dev, SYS_RES_IOPORT,
sc->port_rid) == start)
break;
bus_release_resource(dev, SYS_RES_IOPORT, sc->port_rid,
sc->port_res);
sc->port_res = NULL;
}
DEVPRINTF(1, (dev, "CEM2/CEM3 port 0x%0lx, size 0x%0lx\n",
bus_get_resource_start(dev, SYS_RES_IOPORT, sc->port_rid),
bus_get_resource_count(dev, SYS_RES_IOPORT, sc->port_rid)));
}
if (!sc->port_res) {
DEVPRINTF(1, (dev, "Cannot allocate ioport\n"));
xe_deactivate(dev);
return (ENOMEM);
}
sc->irq_rid = 0;
sc->irq_res = bus_alloc_resource_any(dev, SYS_RES_IRQ, &sc->irq_rid,
RF_ACTIVE);
if (sc->irq_res == NULL) {
DEVPRINTF(1, (dev, "Cannot allocate irq\n"));
xe_deactivate(dev);
return (ENOMEM);
}
return (0);
}
void
xe_deactivate(device_t dev)
{
struct xe_softc *sc = device_get_softc(dev);
DEVPRINTF(2, (dev, "deactivate\n"));
if (sc->intrhand)
bus_teardown_intr(dev, sc->irq_res, sc->intrhand);
sc->intrhand = NULL;
if (sc->port_res)
bus_release_resource(dev, SYS_RES_IOPORT, sc->port_rid,
sc->port_res);
sc->port_res = NULL;
if (sc->ce2_port_res)
bus_release_resource(dev, SYS_RES_IOPORT, sc->ce2_port_rid,
sc->ce2_port_res);
sc->ce2_port_res = NULL;
if (sc->irq_res)
bus_release_resource(dev, SYS_RES_IRQ, sc->irq_rid,
sc->irq_res);
sc->irq_res = NULL;
if (sc->ifp)
if_free(sc->ifp);
sc->ifp = NULL;
}
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