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NetBSD/sys/dev/ic/mb86960.c

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/* $NetBSD: mb86960.c,v 1.26 1998/07/05 06:49:12 jonathan Exp $ */
/*
* All Rights Reserved, Copyright (C) Fujitsu Limited 1995
*
* This software may be used, modified, copied, distributed, and sold, in
* both source and binary form provided that the above copyright, these
* terms and the following disclaimer are retained. The name of the author
* and/or the contributor 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 AND THE CONTRIBUTOR ``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 THE CONTRIBUTOR 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 copyright (C) 1993, David Greenman. This software may be used,
* modified, copied, distributed, and sold, in both source and binary form
* provided that the above copyright and these terms are retained. Under no
* circumstances is the author responsible for the proper functioning of this
* software, nor does the author assume any responsibility for damages
* incurred with its use.
*/
#define FE_VERSION "if_fe.c ver. 0.8"
/*
* Device driver for Fujitsu MB86960A/MB86965A based Ethernet cards.
* Contributed by M.S. <seki@sysrap.cs.fujitsu.co.jp>
*
* This version is intended to be a generic template for various
* MB86960A/MB86965A based Ethernet cards. It currently supports
* Fujitsu FMV-180 series (i.e., FMV-181 and FMV-182) and Allied-
* Telesis AT1700 series and RE2000 series. There are some
* unnecessary hooks embedded, which are primarily intended to support
* other types of Ethernet cards, but the author is not sure whether
* they are useful.
*/
#include "opt_inet.h"
#include "opt_ns.h"
#include "bpfilter.h"
#include "rnd.h"
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/errno.h>
#include <sys/ioctl.h>
#include <sys/mbuf.h>
#include <sys/socket.h>
#include <sys/syslog.h>
#include <sys/device.h>
#if NRND > 0
#include <sys/rnd.h>
#endif
#include <net/if.h>
#include <net/if_dl.h>
#include <net/if_types.h>
#include <net/if_media.h>
#include <net/if_ether.h>
#ifdef INET
#include <netinet/in.h>
#include <netinet/in_systm.h>
#include <netinet/in_var.h>
#include <netinet/ip.h>
#include <netinet/if_inarp.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
#include <machine/bus.h>
#include <dev/ic/mb86960reg.h>
#include <dev/ic/mb86960var.h>
/* Standard driver entry points. These can be static. */
void mb86960_init __P((struct mb86960_softc *));
int mb86960_ioctl __P((struct ifnet *, u_long, caddr_t));
void mb86960_start __P((struct ifnet *));
void mb86960_reset __P((struct mb86960_softc *));
void mb86960_watchdog __P((struct ifnet *));
/* Local functions. Order of declaration is confused. FIXME. */
int mb86960_get_packet __P((struct mb86960_softc *, int));
void mb86960_stop __P((struct mb86960_softc *));
void mb86960_tint __P((struct mb86960_softc *, u_char));
void mb86960_rint __P((struct mb86960_softc *, u_char));
static __inline__
void mb86960_xmit __P((struct mb86960_softc *));
void mb86960_write_mbufs __P((struct mb86960_softc *, struct mbuf *));
static __inline__
void mb86960_droppacket __P((struct mb86960_softc *));
void mb86960_getmcaf __P((struct ethercom *, u_char *));
void mb86960_setmode __P((struct mb86960_softc *));
void mb86960_loadmar __P((struct mb86960_softc *));
int mb86960_enable __P((struct mb86960_softc *));
void mb86960_disable __P((struct mb86960_softc *));
int mb86960_mediachange __P((struct ifnet *));
void mb86960_mediastatus __P((struct ifnet *, struct ifmediareq *));
#if FE_DEBUG >= 1
void mb86960_dump __P((int, struct mb86960_softc *));
#endif
void
mb86960_attach(sc, type, myea)
struct mb86960_softc *sc;
enum mb86960_type type;
u_int8_t *myea;
{
bus_space_tag_t bst = sc->sc_bst;
bus_space_handle_t bsh = sc->sc_bsh;
sc->type = type;
/* Register values which depend on board design. */
sc->proto_dlcr4 = FE_D4_LBC_DISABLE | FE_D4_CNTRL;
sc->proto_dlcr5 = 0;
sc->proto_bmpr13 = FE_B13_TPTYPE_UTP | FE_B13_PORT_AUTO;
switch (sc->type) {
case MB86960_TYPE_86960:
sc->proto_dlcr7 = FE_D7_BYTSWP_LH | FE_D7_IDENT_EC;
break;
case MB86960_TYPE_86965:
sc->proto_dlcr7 = FE_D7_BYTSWP_LH;
break;
}
/*
* Program the 86960 as follows:
* SRAM: 32KB, 100ns, byte-wide access.
* Transmission buffer: 4KB x 2.
* System bus interface: 16 bits.
* We cannot change these values but TXBSIZE, because they
* are hard-wired on the board. Modifying TXBSIZE will affect
* the driver performance.
*/
sc->proto_dlcr6 = FE_D6_BUFSIZ_32KB | FE_D6_TXBSIZ_2x4KB |
FE_D6_BBW_BYTE | FE_D6_SBW_WORD | FE_D6_SRAM_100ns;
/*
* Minimum initialization of the hardware.
* We write into registers; hope I/O ports have no
* overlap with other boards.
*/
/* Initialize 86960. */
bus_space_write_1(bst, bsh, FE_DLCR6,
sc->proto_dlcr6 | FE_D6_DLC_DISABLE);
delay(200);
#ifdef DIAGNOSTIC
if (myea == NULL) {
printf("%s: ethernet address shouldn't be NULL\n",
sc->sc_dev.dv_xname);
panic("NULL ethernet address");
}
#endif
bcopy(myea, sc->sc_enaddr, sizeof(sc->sc_enaddr));
/* Disable all interrupts. */
bus_space_write_1(bst, bsh, FE_DLCR2, 0);
bus_space_write_1(bst, bsh, FE_DLCR3, 0);
}
/*
* Install interface into kernel networking data structures
*/
void
mb86960_config(sc, media, nmedia, defmedia)
struct mb86960_softc *sc;
int *media, nmedia, defmedia;
{
struct cfdata *cf = sc->sc_dev.dv_cfdata;
struct ifnet *ifp = &sc->sc_ec.ec_if;
int i;
/* Stop the 86960. */
mb86960_stop(sc);
/* Initialize ifnet structure. */
bcopy(sc->sc_dev.dv_xname, ifp->if_xname, IFNAMSIZ);
ifp->if_softc = sc;
ifp->if_start = mb86960_start;
ifp->if_ioctl = mb86960_ioctl;
ifp->if_watchdog = mb86960_watchdog;
ifp->if_flags =
IFF_BROADCAST | IFF_SIMPLEX | IFF_NOTRAILERS | IFF_MULTICAST;
#if FE_DEBUG >= 3
log(LOG_INFO, "%s: mb86960_config()\n", sc->sc_dev.dv_xname);
mb86960_dump(LOG_INFO, sc);
#endif
#if FE_SINGLE_TRANSMISSION
/* Override txb config to allocate minimum. */
sc->proto_dlcr6 &= ~FE_D6_TXBSIZ
sc->proto_dlcr6 |= FE_D6_TXBSIZ_2x2KB;
#endif
/* Modify hardware config if it is requested. */
if ((cf->cf_flags & FE_FLAGS_OVERRIDE_DLCR6) != 0)
sc->proto_dlcr6 = cf->cf_flags & FE_FLAGS_DLCR6_VALUE;
/* Find TX buffer size, based on the hardware dependent proto. */
switch (sc->proto_dlcr6 & FE_D6_TXBSIZ) {
case FE_D6_TXBSIZ_2x2KB:
sc->txb_size = 2048;
break;
case FE_D6_TXBSIZ_2x4KB:
sc->txb_size = 4096;
break;
case FE_D6_TXBSIZ_2x8KB:
sc->txb_size = 8192;
break;
default:
/* Oops, we can't work with single buffer configuration. */
#if FE_DEBUG >= 2
log(LOG_WARNING, "%s: strange TXBSIZ config; fixing\n",
sc->sc_dev.dv_xname);
#endif
sc->proto_dlcr6 &= ~FE_D6_TXBSIZ;
sc->proto_dlcr6 |= FE_D6_TXBSIZ_2x2KB;
sc->txb_size = 2048;
break;
}
/* Initialize media goo. */
ifmedia_init(&sc->sc_media, 0, mb86960_mediachange,
mb86960_mediastatus);
if (media != NULL) {
for (i = 0; i < nmedia; i++)
ifmedia_add(&sc->sc_media, media[i], 0, NULL);
ifmedia_set(&sc->sc_media, defmedia);
} else {
ifmedia_add(&sc->sc_media, IFM_ETHER|IFM_MANUAL, 0, NULL);
ifmedia_set(&sc->sc_media, IFM_ETHER|IFM_MANUAL);
}
/* Attach the interface. */
if_attach(ifp);
ether_ifattach(ifp, sc->sc_enaddr);
#if NBPFILTER > 0
/* If BPF is in the kernel, call the attach for it. */
bpfattach(&ifp->if_bpf, ifp, DLT_EN10MB, sizeof(struct ether_header));
#endif
#if NRND > 0
rnd_attach_source(&sc->rnd_source, sc->sc_dev.dv_xname,
RND_TYPE_NET);
#endif
/* Print additional info when attached. */
printf("%s: Ethernet address %s\n", sc->sc_dev.dv_xname,
ether_sprintf(sc->sc_enaddr));
#if FE_DEBUG >= 3
{
int buf, txb, bbw, sbw, ram;
buf = txb = bbw = sbw = ram = -1;
switch (sc->proto_dlcr6 & FE_D6_BUFSIZ) {
case FE_D6_BUFSIZ_8KB:
buf = 8;
break;
case FE_D6_BUFSIZ_16KB:
buf = 16;
break;
case FE_D6_BUFSIZ_32KB:
buf = 32;
break;
case FE_D6_BUFSIZ_64KB:
buf = 64;
break;
}
switch (sc->proto_dlcr6 & FE_D6_TXBSIZ) {
case FE_D6_TXBSIZ_2x2KB:
txb = 2;
break;
case FE_D6_TXBSIZ_2x4KB:
txb = 4;
break;
case FE_D6_TXBSIZ_2x8KB:
txb = 8;
break;
}
switch (sc->proto_dlcr6 & FE_D6_BBW) {
case FE_D6_BBW_BYTE:
bbw = 8;
break;
case FE_D6_BBW_WORD:
bbw = 16;
break;
}
switch (sc->proto_dlcr6 & FE_D6_SBW) {
case FE_D6_SBW_BYTE:
sbw = 8;
break;
case FE_D6_SBW_WORD:
sbw = 16;
break;
}
switch (sc->proto_dlcr6 & FE_D6_SRAM) {
case FE_D6_SRAM_100ns:
ram = 100;
break;
case FE_D6_SRAM_150ns:
ram = 150;
break;
}
printf("%s: SRAM %dKB %dbit %dns, TXB %dKBx2, %dbit I/O\n",
sc->sc_dev.dv_xname, buf, bbw, ram, txb, sbw);
}
#endif
}
/*
* Media change callback.
*/
int
mb86960_mediachange(ifp)
struct ifnet *ifp;
{
struct mb86960_softc *sc = ifp->if_softc;
if (sc->sc_mediachange)
return ((*sc->sc_mediachange)(sc));
return (EINVAL);
}
/*
* Media status callback.
*/
void
mb86960_mediastatus(ifp, ifmr)
struct ifnet *ifp;
struct ifmediareq *ifmr;
{
struct mb86960_softc *sc = ifp->if_softc;
if (sc->sc_enabled == 0) {
ifmr->ifm_active = IFM_ETHER | IFM_NONE;
ifmr->ifm_status = 0;
return;
}
if (sc->sc_mediastatus)
(*sc->sc_mediastatus)(sc, ifmr);
}
/*
* Reset interface.
*/
void
mb86960_reset(sc)
struct mb86960_softc *sc;
{
int s;
s = splnet();
mb86960_stop(sc);
mb86960_init(sc);
splx(s);
}
/*
* Stop everything on the interface.
*
* All buffered packets, both transmitting and receiving,
* if any, will be lost by stopping the interface.
*/
void
mb86960_stop(sc)
struct mb86960_softc *sc;
{
bus_space_tag_t bst = sc->sc_bst;
bus_space_handle_t bsh = sc->sc_bsh;
#if FE_DEBUG >= 3
log(LOG_INFO, "%s: top of mb86960_stop()\n", sc->sc_dev.dv_xname);
mb86960_dump(LOG_INFO, sc);
#endif
/* Disable interrupts. */
bus_space_write_1(bst, bsh, FE_DLCR2, 0x00);
bus_space_write_1(bst, bsh, FE_DLCR3, 0x00);
/* Stop interface hardware. */
delay(200);
bus_space_write_1(bst, bsh, FE_DLCR6,
sc->proto_dlcr6 | FE_D6_DLC_DISABLE);
delay(200);
/* Clear all interrupt status. */
bus_space_write_1(bst, bsh, FE_DLCR0, 0xFF);
bus_space_write_1(bst, bsh, FE_DLCR1, 0xFF);
/* Put the chip in stand-by mode. */
delay(200);
bus_space_write_1(bst, bsh, FE_DLCR7,
sc->proto_dlcr7 | FE_D7_POWER_DOWN);
delay(200);
/* MAR loading can be delayed. */
sc->filter_change = 0;
/* Call a hook. */
if (sc->stop_card)
(*sc->stop_card)(sc);
#if DEBUG >= 3
log(LOG_INFO, "%s: end of mb86960_stop()\n", sc->sc_dev.dv_xname);
mb86960_dump(LOG_INFO, sc);
#endif
}
/*
* Device timeout/watchdog routine. Entered if the device neglects to
* generate an interrupt after a transmit has been started on it.
*/
void
mb86960_watchdog(ifp)
struct ifnet *ifp;
{
struct mb86960_softc *sc = ifp->if_softc;
log(LOG_ERR, "%s: device timeout\n", sc->sc_dev.dv_xname);
#if FE_DEBUG >= 3
mb86960_dump(LOG_INFO, sc);
#endif
/* Record how many packets are lost by this accident. */
sc->sc_ec.ec_if.if_oerrors += sc->txb_sched + sc->txb_count;
mb86960_reset(sc);
}
/*
* Drop (skip) a packet from receive buffer in 86960 memory.
*/
static __inline__ void
mb86960_droppacket(sc)
struct mb86960_softc *sc;
{
bus_space_tag_t bst = sc->sc_bst;
bus_space_handle_t bsh = sc->sc_bsh;
bus_space_write_1(bst, bsh, FE_BMPR14, FE_B14_FILTER | FE_B14_SKIP);
}
/*
* Initialize device.
*/
void
mb86960_init(sc)
struct mb86960_softc *sc;
{
bus_space_tag_t bst = sc->sc_bst;
bus_space_handle_t bsh = sc->sc_bsh;
struct ifnet *ifp = &sc->sc_ec.ec_if;
int i;
#if FE_DEBUG >= 3
log(LOG_INFO, "%s: top of mb86960_init()\n", sc->sc_dev.dv_xname);
mb86960_dump(LOG_INFO, sc);
#endif
/* Reset transmitter flags. */
ifp->if_flags &= ~IFF_OACTIVE;
ifp->if_timer = 0;
sc->txb_free = sc->txb_size;
sc->txb_count = 0;
sc->txb_sched = 0;
/* Do any card-specific initialization, if applicable. */
if (sc->init_card)
(*sc->init_card)(sc);
#if FE_DEBUG >= 3
log(LOG_INFO, "%s: after init hook\n", sc->sc_dev.dv_xname);
mb86960_dump(LOG_INFO, sc);
#endif
/*
* Make sure to disable the chip, also.
* This may also help re-programming the chip after
* hot insertion of PCMCIAs.
*/
bus_space_write_1(bst, bsh, FE_DLCR6,
sc->proto_dlcr6 | FE_D6_DLC_DISABLE);
delay(200);
/* Power up the chip and select register bank for DLCRs. */
bus_space_write_1(bst, bsh, FE_DLCR7,
sc->proto_dlcr7 | FE_D7_RBS_DLCR | FE_D7_POWER_UP);
delay(200);
/* Feed the station address. */
bus_space_write_region_1(bst, bsh, FE_DLCR8,
sc->sc_enaddr, ETHER_ADDR_LEN);
/* Select the BMPR bank for runtime register access. */
bus_space_write_1(bst, bsh, FE_DLCR7,
sc->proto_dlcr7 | FE_D7_RBS_BMPR | FE_D7_POWER_UP);
/* Initialize registers. */
bus_space_write_1(bst, bsh, FE_DLCR0, 0xFF); /* Clear all bits. */
bus_space_write_1(bst, bsh, FE_DLCR1, 0xFF); /* ditto. */
bus_space_write_1(bst, bsh, FE_DLCR2, 0x00);
bus_space_write_1(bst, bsh, FE_DLCR3, 0x00);
bus_space_write_1(bst, bsh, FE_DLCR4, sc->proto_dlcr4);
bus_space_write_1(bst, bsh, FE_DLCR5, sc->proto_dlcr5);
bus_space_write_1(bst, bsh, FE_BMPR10, 0x00);
bus_space_write_1(bst, bsh, FE_BMPR11, FE_B11_CTRL_SKIP);
bus_space_write_1(bst, bsh, FE_BMPR12, 0x00);
bus_space_write_1(bst, bsh, FE_BMPR13, sc->proto_bmpr13);
bus_space_write_1(bst, bsh, FE_BMPR14, FE_B14_FILTER);
bus_space_write_1(bst, bsh, FE_BMPR15, 0x00);
#if FE_DEBUG >= 3
log(LOG_INFO, "%s: just before enabling DLC\n", sc->sc_dev.dv_xname);
mb86960_dump(LOG_INFO, sc);
#endif
/* Enable interrupts. */
bus_space_write_1(bst, bsh, FE_DLCR2, FE_TMASK);
bus_space_write_1(bst, bsh, FE_DLCR3, FE_RMASK);
/* Enable transmitter and receiver. */
delay(200);
bus_space_write_1(bst, bsh, FE_DLCR6,
sc->proto_dlcr6 | FE_D6_DLC_ENABLE);
delay(200);
#if FE_DEBUG >= 3
log(LOG_INFO, "%s: just after enabling DLC\n", sc->sc_dev.dv_xname);
mb86960_dump(LOG_INFO, sc);
#endif
/*
* Make sure to empty the receive buffer.
*
* This may be redundant, but *if* the receive buffer were full
* at this point, the driver would hang. I have experienced
* some strange hangups just after UP. I hope the following
* code solve the problem.
*
* I have changed the order of hardware initialization.
* I think the receive buffer cannot have any packets at this
* point in this version. The following code *must* be
* redundant now. FIXME.
*/
for (i = 0; i < FE_MAX_RECV_COUNT; i++) {
if (bus_space_read_1(bst, bsh, FE_DLCR5) & FE_D5_BUFEMP)
break;
mb86960_droppacket(sc);
}
#if FE_DEBUG >= 1
if (i >= FE_MAX_RECV_COUNT)
log(LOG_ERR, "%s: cannot empty receive buffer\n",
sc->sc_dev.dv_xname);
#endif
#if FE_DEBUG >= 3
if (i < FE_MAX_RECV_COUNT)
log(LOG_INFO, "%s: receive buffer emptied (%d)\n",
sc->sc_dev.dv_xname, i);
#endif
#if FE_DEBUG >= 3
log(LOG_INFO, "%s: after ERB loop\n", sc->sc_dev.dv_xname);
mb86960_dump(LOG_INFO, sc);
#endif
/* Do we need this here? */
bus_space_write_1(bst, bsh, FE_DLCR0, 0xFF); /* Clear all bits. */
bus_space_write_1(bst, bsh, FE_DLCR1, 0xFF); /* ditto. */
#if FE_DEBUG >= 3
log(LOG_INFO, "%s: after FIXME\n", sc->sc_dev.dv_xname);
mb86960_dump(LOG_INFO, sc);
#endif
/* Set 'running' flag. */
ifp->if_flags |= IFF_RUNNING;
/*
* At this point, the interface is runnung properly,
* except that it receives *no* packets. we then call
* mb86960_setmode() to tell the chip what packets to be
* received, based on the if_flags and multicast group
* list. It completes the initialization process.
*/
mb86960_setmode(sc);
#if FE_DEBUG >= 3
log(LOG_INFO, "%s: after setmode\n", sc->sc_dev.dv_xname);
mb86960_dump(LOG_INFO, sc);
#endif
/* ...and attempt to start output. */
mb86960_start(ifp);
#if FE_DEBUG >= 3
log(LOG_INFO, "%s: end of mb86960_init()\n", sc->sc_dev.dv_xname);
mb86960_dump(LOG_INFO, sc);
#endif
}
/*
* This routine actually starts the transmission on the interface
*/
static __inline__ void
mb86960_xmit(sc)
struct mb86960_softc *sc;
{
bus_space_tag_t bst = sc->sc_bst;
bus_space_handle_t bsh = sc->sc_bsh;
/*
* Set a timer just in case we never hear from the board again.
* We use longer timeout for multiple packet transmission.
* I'm not sure this timer value is appropriate. FIXME.
*/
sc->sc_ec.ec_if.if_timer = 1 + sc->txb_count;
/* Update txb variables. */
sc->txb_sched = sc->txb_count;
sc->txb_count = 0;
sc->txb_free = sc->txb_size;
#if FE_DELAYED_PADDING
/* Omit the postponed padding process. */
sc->txb_padding = 0;
#endif
/* Start transmitter, passing packets in TX buffer. */
bus_space_write_1(bst, bsh, FE_BMPR10, sc->txb_sched | FE_B10_START);
}
/*
* Start output on interface.
* We make two assumptions here:
* 1) that the current priority is set to splnet _before_ this code
* is called *and* is returned to the appropriate priority after
* return
* 2) that the IFF_OACTIVE flag is checked before this code is called
* (i.e. that the output part of the interface is idle)
*/
void
mb86960_start(ifp)
struct ifnet *ifp;
{
struct mb86960_softc *sc = ifp->if_softc;
struct mbuf *m;
#if FE_DEBUG >= 1
/* Just a sanity check. */
if ((sc->txb_count == 0) != (sc->txb_free == sc->txb_size)) {
/*
* Txb_count and txb_free co-works to manage the
* transmission buffer. Txb_count keeps track of the
* used potion of the buffer, while txb_free does unused
* potion. So, as long as the driver runs properly,
* txb_count is zero if and only if txb_free is same
* as txb_size (which represents whole buffer.)
*/
log(LOG_ERR, "%s: inconsistent txb variables (%d, %d)\n",
sc->sc_dev.dv_xname, sc->txb_count, sc->txb_free);
/*
* So, what should I do, then?
*
* We now know txb_count and txb_free contradicts. We
* cannot, however, tell which is wrong. More
* over, we cannot peek 86960 transmission buffer or
* reset the transmission buffer. (In fact, we can
* reset the entire interface. I don't want to do it.)
*
* If txb_count is incorrect, leaving it as is will cause
* sending of gabages after next interrupt. We have to
* avoid it. Hence, we reset the txb_count here. If
* txb_free was incorrect, resetting txb_count just loose
* some packets. We can live with it.
*/
sc->txb_count = 0;
}
#endif
#if FE_DEBUG >= 1
/*
* First, see if there are buffered packets and an idle
* transmitter - should never happen at this point.
*/
if ((sc->txb_count > 0) && (sc->txb_sched == 0)) {
log(LOG_ERR, "%s: transmitter idle with %d buffered packets\n",
sc->sc_dev.dv_xname, sc->txb_count);
mb86960_xmit(sc);
}
#endif
/*
* Stop accepting more transmission packets temporarily, when
* a filter change request is delayed. Updating the MARs on
* 86960 flushes the transmisstion buffer, so it is delayed
* until all buffered transmission packets have been sent
* out.
*/
if (sc->filter_change) {
/*
* Filter change requst is delayed only when the DLC is
* working. DLC soon raise an interrupt after finishing
* the work.
*/
goto indicate_active;
}
for (;;) {
/*
* See if there is room to put another packet in the buffer.
* We *could* do better job by peeking the send queue to
* know the length of the next packet. Current version just
* tests against the worst case (i.e., longest packet). FIXME.
*
* When adding the packet-peek feature, don't forget adding a
* test on txb_count against QUEUEING_MAX.
* There is a little chance the packet count exceeds
* the limit. Assume transmission buffer is 8KB (2x8KB
* configuration) and an application sends a bunch of small
* (i.e., minimum packet sized) packets rapidly. An 8KB
* buffer can hold 130 blocks of 62 bytes long...
*/
if (sc->txb_free < ETHER_MAX_LEN + FE_DATA_LEN_LEN) {
/* No room. */
goto indicate_active;
}
#if FE_SINGLE_TRANSMISSION
if (sc->txb_count > 0) {
/* Just one packet per a transmission buffer. */
goto indicate_active;
}
#endif
/*
* Get the next mbuf chain for a packet to send.
*/
IF_DEQUEUE(&ifp->if_snd, m);
if (m == 0) {
/* No more packets to send. */
goto indicate_inactive;
}
#if NBPFILTER > 0
/* Tap off here if there is a BPF listener. */
if (ifp->if_bpf)
bpf_mtap(ifp->if_bpf, m);
#endif
/*
* Copy the mbuf chain into the transmission buffer.
* txb_* variables are updated as necessary.
*/
mb86960_write_mbufs(sc, m);
m_freem(m);
/* Start transmitter if it's idle. */
if (sc->txb_sched == 0)
mb86960_xmit(sc);
}
indicate_inactive:
/*
* 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_flags &= ~IFF_OACTIVE;
return;
indicate_active:
/*
* The transmitter is active, and there are no room for
* more outgoing packets in the transmission buffer.
*/
ifp->if_flags |= IFF_OACTIVE;
return;
}
/*
* Transmission interrupt handler
* The control flow of this function looks silly. FIXME.
*/
void
mb86960_tint(sc, tstat)
struct mb86960_softc *sc;
u_char tstat;
{
bus_space_tag_t bst = sc->sc_bst;
bus_space_handle_t bsh = sc->sc_bsh;
struct ifnet *ifp = &sc->sc_ec.ec_if;
int left;
int col;
/*
* Handle "excessive collision" interrupt.
*/
if (tstat & FE_D0_COLL16) {
/*
* Find how many packets (including this collided one)
* are left unsent in transmission buffer.
*/
left = bus_space_read_1(bst, bsh, FE_BMPR10);
#if FE_DEBUG >= 2
log(LOG_WARNING, "%s: excessive collision (%d/%d)\n",
sc->sc_dev.dv_xname, left, sc->txb_sched);
#endif
#if FE_DEBUG >= 3
mb86960_dump(LOG_INFO, sc);
#endif
/*
* Update statistics.
*/
ifp->if_collisions += 16;
ifp->if_oerrors++;
ifp->if_opackets += sc->txb_sched - left;
/*
* Collision statistics has been updated.
* Clear the collision flag on 86960 now to avoid confusion.
*/
bus_space_write_1(bst, bsh, FE_DLCR0, FE_D0_COLLID);
/*
* Restart transmitter, skipping the
* collided packet.
*
* We *must* skip the packet to keep network running
* properly. Excessive collision error is an
* indication of the network overload. If we
* tried sending the same packet after excessive
* collision, the network would be filled with
* out-of-time packets. Packets belonging
* to reliable transport (such as TCP) are resent
* by some upper layer.
*/
bus_space_write_1(bst, bsh, FE_BMPR11,
FE_B11_CTRL_SKIP | FE_B11_MODE1);
sc->txb_sched = left - 1;
}
/*
* Handle "transmission complete" interrupt.
*/
if (tstat & FE_D0_TXDONE) {
/*
* Add in total number of collisions on last
* transmission. We also clear "collision occurred" flag
* here.
*
* 86960 has a design flow on collision count on multiple
* packet transmission. When we send two or more packets
* with one start command (that's what we do when the
* transmission queue is clauded), 86960 informs us number
* of collisions occured on the last packet on the
* transmission only. Number of collisions on previous
* packets are lost. I have told that the fact is clearly
* stated in the Fujitsu document.
*
* I considered not to mind it seriously. Collision
* count is not so important, anyway. Any comments? FIXME.
*/
if (bus_space_read_1(bst, bsh, FE_DLCR0) & FE_D0_COLLID) {
/* Clear collision flag. */
bus_space_write_1(bst, bsh, FE_DLCR0, FE_D0_COLLID);
/* Extract collision count from 86960. */
col = bus_space_read_1(bst, bsh, FE_DLCR4) & FE_D4_COL;
if (col == 0) {
/*
* Status register indicates collisions,
* while the collision count is zero.
* This can happen after multiple packet
* transmission, indicating that one or more
* previous packet(s) had been collided.
*
* Since the accurate number of collisions
* has been lost, we just guess it as 1;
* Am I too optimistic? FIXME.
*/
col = 1;
} else
col >>= FE_D4_COL_SHIFT;
ifp->if_collisions += col;
#if FE_DEBUG >= 4
log(LOG_WARNING, "%s: %d collision%s (%d)\n",
sc->sc_dev.dv_xname, col, col == 1 ? "" : "s",
sc->txb_sched);
#endif
}
/*
* Update total number of successfully
* transmitted packets.
*/
ifp->if_opackets += sc->txb_sched;
sc->txb_sched = 0;
}
if (sc->txb_sched == 0) {
/*
* The transmitter is no more active.
* Reset output active flag and watchdog timer.
*/
ifp->if_flags &= ~IFF_OACTIVE;
ifp->if_timer = 0;
/*
* If more data is ready to transmit in the buffer, start
* transmitting them. Otherwise keep transmitter idle,
* even if more data is queued. This gives receive
* process a slight priority.
*/
if (sc->txb_count > 0)
mb86960_xmit(sc);
}
}
/*
* Ethernet interface receiver interrupt.
*/
void
mb86960_rint(sc, rstat)
struct mb86960_softc *sc;
u_char rstat;
{
bus_space_tag_t bst = sc->sc_bst;
bus_space_handle_t bsh = sc->sc_bsh;
struct ifnet *ifp = &sc->sc_ec.ec_if;
int len;
u_char status;
int i;
/*
* Update statistics if this interrupt is caused by an error.
*/
if (rstat & (FE_D1_OVRFLO | FE_D1_CRCERR | FE_D1_ALGERR |
FE_D1_SRTPKT)) {
#if FE_DEBUG >= 3
log(LOG_WARNING, "%s: receive error: %b\n",
sc->sc_dev.dv_xname, rstat, FE_D1_ERRBITS);
#endif
ifp->if_ierrors++;
}
/*
* MB86960 has a flag indicating "receive queue empty."
* We just loop cheking the flag to pull out all received
* packets.
*
* We limit the number of iterrations to avoid infinite loop.
* It can be caused by a very slow CPU (some broken
* peripheral may insert incredible number of wait cycles)
* or, worse, by a broken MB86960 chip.
*/
for (i = 0; i < FE_MAX_RECV_COUNT; i++) {
/* Stop the iterration if 86960 indicates no packets. */
if (bus_space_read_1(bst, bsh, FE_DLCR5) & FE_D5_BUFEMP)
break;
/*
* Extract A receive status byte.
* As our 86960 is in 16 bit bus access mode, we have to
* use inw() to get the status byte. The significant
* value is returned in lower 8 bits.
*/
status = (u_char)bus_space_read_2(bst, bsh, FE_BMPR8);
#if FE_DEBUG >= 4
log(LOG_INFO, "%s: receive status = %02x\n",
sc->sc_dev.dv_xname, status);
#endif
/*
* If there was an error, update statistics and drop
* the packet, unless the interface is in promiscuous
* mode.
*/
if ((status & 0xF0) != 0x20) { /* XXXX ? */
if ((ifp->if_flags & IFF_PROMISC) == 0) {
ifp->if_ierrors++;
mb86960_droppacket(sc);
continue;
}
}
/*
* Extract the packet length.
* It is a sum of a header (14 bytes) and a payload.
* CRC has been stripped off by the 86960.
*/
len = bus_space_read_2(bst, bsh, FE_BMPR8);
/*
* MB86965 checks the packet length and drop big packet
* before passing it to us. There are no chance we can
* get [crufty] packets. Hence, if the length exceeds
* the specified limit, it means some serious failure,
* such as out-of-sync on receive buffer management.
*
* Is this statement true? FIXME.
*/
if (len > ETHER_MAX_LEN || len < ETHER_HDR_SIZE) {
#if FE_DEBUG >= 2
log(LOG_WARNING,
"%s: received a %s packet? (%u bytes)\n",
sc->sc_dev.dv_xname,
len < ETHER_HDR_SIZE ? "partial" : "big", len);
#endif
ifp->if_ierrors++;
mb86960_droppacket(sc);
continue;
}
/*
* Check for a short (RUNT) packet. We *do* check
* but do nothing other than print a message.
* Short packets are illegal, but does nothing bad
* if it carries data for upper layer.
*/
#if FE_DEBUG >= 2
if (len < ETHER_MIN_LEN) {
log(LOG_WARNING,
"%s: received a short packet? (%u bytes)\n",
sc->sc_dev.dv_xname, len);
}
#endif
/*
* Go get a packet.
*/
if (!mb86960_get_packet(sc, len)) {
/* Skip a packet, updating statistics. */
#if FE_DEBUG >= 2
log(LOG_WARNING,
"%s: out of mbufs; dropping packet (%u bytes)\n",
sc->sc_dev.dv_xname, len);
#endif
ifp->if_ierrors++;
mb86960_droppacket(sc);
/*
* We stop receiving packets, even if there are
* more in the buffer. We hope we can get more
* mbufs next time.
*/
return;
}
/* Successfully received a packet. Update stat. */
ifp->if_ipackets++;
}
}
/*
* Ethernet interface interrupt processor
*/
int
mb86960_intr(arg)
void *arg;
{
struct mb86960_softc *sc = arg;
bus_space_tag_t bst = sc->sc_bst;
bus_space_handle_t bsh = sc->sc_bsh;
struct ifnet *ifp = &sc->sc_ec.ec_if;
u_char tstat, rstat;
if (sc->sc_enabled == 0)
return (0);
#if FE_DEBUG >= 4
log(LOG_INFO, "%s: mb86960_intr()\n", sc->sc_dev.dv_xname);
mb86960_dump(LOG_INFO, sc);
#endif
/*
* Get interrupt conditions, masking unneeded flags.
*/
tstat = bus_space_read_1(bst, bsh, FE_DLCR0) & FE_TMASK;
rstat = bus_space_read_1(bst, bsh, FE_DLCR1) & FE_RMASK;
if (tstat == 0 && rstat == 0)
return (0);
/*
* Loop until there are no more new interrupt conditions.
*/
for (;;) {
/*
* Reset the conditions we are acknowledging.
*/
bus_space_write_1(bst, bsh, FE_DLCR0, tstat);
bus_space_write_1(bst, bsh, FE_DLCR1, rstat);
/*
* Handle transmitter interrupts. Handle these first because
* the receiver will reset the board under some conditions.
*/
if (tstat != 0)
mb86960_tint(sc, tstat);
/*
* Handle receiver interrupts.
*/
if (rstat != 0)
mb86960_rint(sc, rstat);
/*
* Update the multicast address filter if it is
* needed and possible. We do it now, because
* we can make sure the transmission buffer is empty,
* and there is a good chance that the receive queue
* is empty. It will minimize the possibility of
* packet lossage.
*/
if (sc->filter_change &&
sc->txb_count == 0 && sc->txb_sched == 0) {
mb86960_loadmar(sc);
ifp->if_flags &= ~IFF_OACTIVE;
}
/*
* If it looks like the transmitter can take more data,
* attempt to start output on the interface. This is done
* after handling the receiver interrupt to give the
* receive operation priority.
*/
if ((ifp->if_flags & IFF_OACTIVE) == 0)
mb86960_start(ifp);
#if NRND > 0
if (rstat != 0 || tstat != 0)
rnd_add_uint32(&sc->rnd_source, rstat + tstat);
#endif
/*
* Get interrupt conditions, masking unneeded flags.
*/
tstat = bus_space_read_1(bst, bsh, FE_DLCR0) & FE_TMASK;
rstat = bus_space_read_1(bst, bsh, FE_DLCR1) & FE_RMASK;
if (tstat == 0 && rstat == 0)
return (1);
}
}
/*
* Process an ioctl request. This code needs some work - it looks pretty ugly.
*/
int
mb86960_ioctl(ifp, cmd, data)
struct ifnet *ifp;
u_long cmd;
caddr_t data;
{
struct mb86960_softc *sc = ifp->if_softc;
struct ifaddr *ifa = (struct ifaddr *)data;
struct ifreq *ifr = (struct ifreq *)data;
int s, error = 0;
#if FE_DEBUG >= 3
log(LOG_INFO, "%s: ioctl(%lx)\n", sc->sc_dev.dv_xname, cmd);
#endif
s = splnet();
switch (cmd) {
case SIOCSIFADDR:
if ((error = mb86960_enable(sc)) != 0)
break;
ifp->if_flags |= IFF_UP;
switch (ifa->ifa_addr->sa_family) {
#ifdef INET
case AF_INET:
mb86960_init(sc);
arp_ifinit(ifp, ifa);
break;
#endif
#ifdef NS
case AF_NS:
{
struct ns_addr *ina = &IA_SNS(ifa)->sns_addr;
if (ns_nullhost(*ina))
ina->x_host =
*(union ns_host *)LLADDR(ifp->if_sadl);
else {
bcopy(ina->x_host.c_host, LLADDR(ifp->if_sadl),
ETHER_ADDR_LEN);
}
/* Set new address. */
mb86960_init(sc);
break;
}
#endif
default:
mb86960_init(sc);
break;
}
break;
case SIOCSIFFLAGS:
if ((ifp->if_flags & IFF_UP) == 0 &&
(ifp->if_flags & IFF_RUNNING) != 0) {
/*
* If interface is marked down and it is running, then
* stop it.
*/
mb86960_stop(sc);
ifp->if_flags &= ~IFF_RUNNING;
mb86960_disable(sc);
} else if ((ifp->if_flags & IFF_UP) != 0 &&
(ifp->if_flags & IFF_RUNNING) == 0) {
/*
* If interface is marked up and it is stopped, then
* start it.
*/
if ((error = mb86960_enable(sc)) != 0)
break;
mb86960_init(sc);
} else if (sc->sc_enabled) {
/*
* Reset the interface to pick up changes in any other
* flags that affect hardware registers.
*/
mb86960_setmode(sc);
}
#if DEBUG >= 1
/* "ifconfig fe0 debug" to print register dump. */
if (ifp->if_flags & IFF_DEBUG) {
log(LOG_INFO, "%s: SIOCSIFFLAGS(DEBUG)\n",
sc->sc_dev.dv_xname);
mb86960_dump(LOG_DEBUG, sc);
}
#endif
break;
case SIOCADDMULTI:
case SIOCDELMULTI:
if (sc->sc_enabled == 0) {
error = EIO;
break;
}
/* Update our multicast list. */
error = (cmd == SIOCADDMULTI) ?
ether_addmulti(ifr, &sc->sc_ec) :
ether_delmulti(ifr, &sc->sc_ec);
if (error == ENETRESET) {
/*
* Multicast list has changed; set the hardware filter
* accordingly.
*/
mb86960_setmode(sc);
error = 0;
}
break;
case SIOCGIFMEDIA:
case SIOCSIFMEDIA:
error = ifmedia_ioctl(ifp, ifr, &sc->sc_media, cmd);
break;
default:
error = EINVAL;
break;
}
splx(s);
return (error);
}
/*
* Retreive packet from receive buffer and send to the next level up via
* ether_input(). If there is a BPF listener, give a copy to BPF, too.
* Returns 0 if success, -1 if error (i.e., mbuf allocation failure).
*/
int
mb86960_get_packet(sc, len)
struct mb86960_softc *sc;
int len;
{
bus_space_tag_t bst = sc->sc_bst;
bus_space_handle_t bsh = sc->sc_bsh;
struct ifnet *ifp = &sc->sc_ec.ec_if;
struct ether_header *eh;
struct mbuf *m;
/* Allocate a header mbuf. */
MGETHDR(m, M_DONTWAIT, MT_DATA);
if (m == 0)
return (0);
m->m_pkthdr.rcvif = ifp;
m->m_pkthdr.len = len;
/* The following silliness is to make NFS happy. */
#define EROUND ((sizeof(struct ether_header) + 3) & ~3)
#define EOFF (EROUND - sizeof(struct ether_header))
/*
* Our strategy has one more problem. There is a policy on
* mbuf cluster allocation. It says that we must have at
* least MINCLSIZE (208 bytes) to allocate a cluster. For a
* packet of a size between (MHLEN - 2) to (MINCLSIZE - 2),
* our code violates the rule...
* On the other hand, the current code is short, simle,
* and fast, however. It does no harmful thing, just waists
* some memory. Any comments? FIXME.
*/
/* Attach a cluster if this packet doesn't fit in a normal mbuf. */
if (len > MHLEN - EOFF) {
MCLGET(m, M_DONTWAIT);
if ((m->m_flags & M_EXT) == 0) {
m_freem(m);
return (0);
}
}
/*
* The following assumes there is room for the ether header in the
* header mbuf.
*/
m->m_data += EOFF;
eh = mtod(m, struct ether_header *);
/* Set the length of this packet. */
m->m_len = len;
/* Get a packet. */
bus_space_read_multi_2(bst, bsh, FE_BMPR8, m->m_data, (len + 1) >> 1);
#if NBPFILTER > 0
/*
* Check if there's a BPF listener on this interface. If so, hand off
* the raw packet to bpf.
*/
if (ifp->if_bpf) {
bpf_mtap(ifp->if_bpf, m);
/*
* 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.
*/
if ((ifp->if_flags & IFF_PROMISC) != 0 &&
(eh->ether_dhost[0] & 1) == 0 && /* !mcast and !bcast */
bcmp(eh->ether_dhost, sc->sc_enaddr,
sizeof(eh->ether_dhost)) != 0) {
m_freem(m);
return (1);
}
}
#endif
/* Fix up data start offset in mbuf to point past ether header. */
m_adj(m, sizeof(struct ether_header));
ether_input(ifp, eh, m);
return (1);
}
/*
* Write an mbuf chain to the transmission buffer memory using 16 bit PIO.
* Returns number of bytes actually written, including length word.
*
* If an mbuf chain is too long for an Ethernet frame, it is not sent.
* Packets shorter than Ethernet minimum are legal, and we pad them
* before sending out. An exception is "partial" packets which are
* shorter than mandatory Ethernet header.
*
* I wrote a code for an experimental "delayed padding" technique.
* When employed, it postpones the padding process for short packets.
* If xmit() occured at the moment, the padding process is omitted, and
* garbages are sent as pad data. If next packet is stored in the
* transmission buffer before xmit(), write_mbuf() pads the previous
* packet before transmitting new packet. This *may* gain the
* system performance (slightly).
*/
void
mb86960_write_mbufs(sc, m)
struct mb86960_softc *sc;
struct mbuf *m;
{
bus_space_tag_t bst = sc->sc_bst;
bus_space_handle_t bsh = sc->sc_bsh;
u_char *data;
u_short savebyte; /* WARNING: Architecture dependent! */
int totlen, len, wantbyte;
#if FE_DEBUG >= 2
struct mbuf *mp;
#endif
/* XXX thorpej 960116 - quiet bogus compiler warning. */
savebyte = 0;
#if FE_DELAYED_PADDING
/* Do the "delayed padding." */
len = sc->txb_padding >> 1;
if (len > 0) {
while (--len >= 0)
bus_space_write_2(bst, bsh, FE_BMPR8, 0);
sc->txb_padding = 0;
}
#endif
/* We need to use m->m_pkthdr.len, so require the header */
if ((m->m_flags & M_PKTHDR) == 0)
panic("mb86960_write_mbufs: no header mbuf");
#if FE_DEBUG >= 2
/* First, count up the total number of bytes to copy. */
for (totlen = 0, mp = m; mp != 0; mp = mp->m_next)
totlen += mp->m_len;
/* Check if this matches the one in the packet header. */
if (totlen != m->m_pkthdr.len)
log(LOG_WARNING, "%s: packet length mismatch? (%d/%d)\n",
sc->sc_dev.dv_xname, totlen, m->m_pkthdr.len);
#else
/* Just use the length value in the packet header. */
totlen = m->m_pkthdr.len;
#endif
#if FE_DEBUG >= 1
/*
* Should never send big packets. If such a packet is passed,
* it should be a bug of upper layer. We just ignore it.
* ... Partial (too short) packets, neither.
*/
if (totlen > ETHER_MAX_LEN || totlen < ETHER_HDR_SIZE) {
log(LOG_ERR, "%s: got a %s packet (%u bytes) to send\n",
sc->sc_dev.dv_xname,
totlen < ETHER_HDR_SIZE ? "partial" : "big", totlen);
sc->sc_ec.ec_if.if_oerrors++;
return;
}
#endif
/*
* Put the length word for this frame.
* Does 86960 accept odd length? -- Yes.
* Do we need to pad the length to minimum size by ourselves?
* -- Generally yes. But for (or will be) the last
* packet in the transmission buffer, we can skip the
* padding process. It may gain performance slightly. FIXME.
*/
bus_space_write_2(bst, bsh, FE_BMPR8, max(totlen, ETHER_MIN_LEN));
/*
* Update buffer status now.
* Truncate the length up to an even number, since we use outw().
*/
totlen = (totlen + 1) & ~1;
sc->txb_free -= FE_DATA_LEN_LEN + max(totlen, ETHER_MIN_LEN);
sc->txb_count++;
#if FE_DELAYED_PADDING
/* Postpone the packet padding if necessary. */
if (totlen < ETHER_MIN_LEN)
sc->txb_padding = ETHER_MIN_LEN - totlen;
#endif
/*
* Transfer the data from mbuf chain to the transmission buffer.
* MB86960 seems to require that data be transferred as words, and
* only words. So that we require some extra code to patch
* over odd-length mbufs.
*/
wantbyte = 0;
for (; m != 0; m = m->m_next) {
/* Ignore empty mbuf. */
len = m->m_len;
if (len == 0)
continue;
/* Find the actual data to send. */
data = mtod(m, caddr_t);
/* Finish the last byte. */
if (wantbyte) {
bus_space_write_2(bst, bsh, FE_BMPR8,
savebyte | (*data << 8));
data++;
len--;
wantbyte = 0;
}
/* Output contiguous words. */
if (len > 1)
bus_space_write_multi_2(bst, bsh, FE_BMPR8, data,
len >> 1);
/* Save remaining byte, if there is one. */
if (len & 1) {
data += len & ~1;
savebyte = *data;
wantbyte = 1;
}
}
/* Spit the last byte, if the length is odd. */
if (wantbyte)
bus_space_write_2(bst, bsh, FE_BMPR8, savebyte);
#if ! FE_DELAYED_PADDING
/*
* Pad the packet to the minimum length if necessary.
*/
len = (ETHER_MIN_LEN >> 1) - (totlen >> 1);
while (--len >= 0)
bus_space_write_2(bst, bsh, FE_BMPR8, 0);
#endif
}
/*
* Compute the multicast address filter from the
* list of multicast addresses we need to listen to.
*/
void
mb86960_getmcaf(ec, af)
struct ethercom *ec;
u_char *af;
{
struct ifnet *ifp = &ec->ec_if;
struct ether_multi *enm;
register u_char *cp;
register u_int32_t crc;
static const u_int32_t crctab[] = {
0x00000000, 0x1db71064, 0x3b6e20c8, 0x26d930ac,
0x76dc4190, 0x6b6b51f4, 0x4db26158, 0x5005713c,
0xedb88320, 0xf00f9344, 0xd6d6a3e8, 0xcb61b38c,
0x9b64c2b0, 0x86d3d2d4, 0xa00ae278, 0xbdbdf21c
};
register int len;
struct ether_multistep step;
/*
* Set up multicast address filter by passing all multicast addresses
* through a crc generator, and then using the high order 6 bits as an
* index into the 64 bit logical address filter. The high order bit
* selects the word, while the rest of the bits select the bit within
* the word.
*/
if ((ifp->if_flags & IFF_PROMISC) != 0)
goto allmulti;
af[0] = af[1] = af[2] = af[3] = af[4] = af[5] = af[6] = af[7] = 0x00;
ETHER_FIRST_MULTI(step, ec, enm);
while (enm != NULL) {
if (bcmp(enm->enm_addrlo, enm->enm_addrhi,
sizeof(enm->enm_addrlo)) != 0) {
/*
* We must listen to a range of multicast addresses.
* For now, just accept all multicasts, rather than
* trying to set only those filter bits needed to match
* the range. (At this time, the only use of address
* ranges is for IP multicast routing, for which the
* range is big enough to require all bits set.)
*/
goto allmulti;
}
cp = enm->enm_addrlo;
crc = 0xffffffff;
for (len = sizeof(enm->enm_addrlo); --len >= 0;) {
crc ^= *cp++;
crc = (crc >> 4) ^ crctab[crc & 0xf];
crc = (crc >> 4) ^ crctab[crc & 0xf];
}
/* Just want the 6 most significant bits. */
crc >>= 26;
/* Turn on the corresponding bit in the filter. */
af[crc >> 3] |= 1 << (crc & 7);
ETHER_NEXT_MULTI(step, enm);
}
ifp->if_flags &= ~IFF_ALLMULTI;
return;
allmulti:
ifp->if_flags |= IFF_ALLMULTI;
af[0] = af[1] = af[2] = af[3] = af[4] = af[5] = af[6] = af[7] = 0xff;
}
/*
* Calculate a new "multicast packet filter" and put the 86960
* receiver in appropriate mode.
*/
void
mb86960_setmode(sc)
struct mb86960_softc *sc;
{
bus_space_tag_t bst = sc->sc_bst;
bus_space_handle_t bsh = sc->sc_bsh;
int flags = sc->sc_ec.ec_if.if_flags;
/*
* If the interface is not running, we postpone the update
* process for receive modes and multicast address filter
* until the interface is restarted. It reduces some
* complicated job on maintaining chip states. (Earlier versions
* of this driver had a bug on that point...)
*
* To complete the trick, mb86960_init() calls mb86960_setmode() after
* restarting the interface.
*/
if ((flags & IFF_RUNNING) == 0)
return;
/*
* Promiscuous mode is handled separately.
*/
if ((flags & IFF_PROMISC) != 0) {
/*
* Program 86960 to receive all packets on the segment
* including those directed to other stations.
* Multicast filter stored in MARs are ignored
* under this setting, so we don't need to update it.
*
* Promiscuous mode is used solely by BPF, and BPF only
* listens to valid (no error) packets. So, we ignore
* errornous ones even in this mode.
*/
bus_space_write_1(bst, bsh, FE_DLCR5,
sc->proto_dlcr5 | FE_D5_AFM0 | FE_D5_AFM1);
sc->filter_change = 0;
#if FE_DEBUG >= 3
log(LOG_INFO, "%s: promiscuous mode\n", sc->sc_dev.dv_xname);
#endif
return;
}
/*
* Turn the chip to the normal (non-promiscuous) mode.
*/
bus_space_write_1(bst, bsh, FE_DLCR5, sc->proto_dlcr5 | FE_D5_AFM1);
/*
* Find the new multicast filter value.
*/
mb86960_getmcaf(&sc->sc_ec, sc->filter);
sc->filter_change = 1;
#if FE_DEBUG >= 3
log(LOG_INFO,
"%s: address filter: [%02x %02x %02x %02x %02x %02x %02x %02x]\n",
sc->sc_dev.dv_xname,
sc->filter[0], sc->filter[1], sc->filter[2], sc->filter[3],
sc->filter[4], sc->filter[5], sc->filter[6], sc->filter[7]);
#endif
/*
* We have to update the multicast filter in the 86960, A.S.A.P.
*
* Note that the DLC (Data Linc Control unit, i.e. transmitter
* and receiver) must be stopped when feeding the filter, and
* DLC trushes all packets in both transmission and receive
* buffers when stopped.
*
* ... Are the above sentenses correct? I have to check the
* manual of the MB86960A. FIXME.
*
* To reduce the packet lossage, we delay the filter update
* process until buffers are empty.
*/
if (sc->txb_sched == 0 && sc->txb_count == 0 &&
(bus_space_read_1(bst, bsh, FE_DLCR1) & FE_D1_PKTRDY) == 0) {
/*
* Buffers are (apparently) empty. Load
* the new filter value into MARs now.
*/
mb86960_loadmar(sc);
} else {
/*
* Buffers are not empty. Mark that we have to update
* the MARs. The new filter will be loaded by mb86960_intr()
* later.
*/
#if FE_DEBUG >= 4
log(LOG_INFO, "%s: filter change delayed\n",
sc->sc_dev.dv_xname);
#endif
}
}
/*
* Load a new multicast address filter into MARs.
*
* The caller must have splnet'ed befor mb86960_loadmar.
* This function starts the DLC upon return. So it can be called only
* when the chip is working, i.e., from the driver's point of view, when
* a device is RUNNING. (I mistook the point in previous versions.)
*/
void
mb86960_loadmar(sc)
struct mb86960_softc *sc;
{
bus_space_tag_t bst = sc->sc_bst;
bus_space_handle_t bsh = sc->sc_bsh;
/* Stop the DLC (transmitter and receiver). */
bus_space_write_1(bst, bsh, FE_DLCR6,
sc->proto_dlcr6 | FE_D6_DLC_DISABLE);
/* Select register bank 1 for MARs. */
bus_space_write_1(bst, bsh, FE_DLCR7,
sc->proto_dlcr7 | FE_D7_RBS_MAR | FE_D7_POWER_UP);
/* Copy filter value into the registers. */
bus_space_write_region_1(bst, bsh, FE_MAR8, sc->filter, FE_FILTER_LEN);
/* Restore the bank selection for BMPRs (i.e., runtime registers). */
bus_space_write_1(bst, bsh, FE_DLCR7,
sc->proto_dlcr7 | FE_D7_RBS_BMPR | FE_D7_POWER_UP);
/* Restart the DLC. */
bus_space_write_1(bst, bsh, FE_DLCR6,
sc->proto_dlcr6 | FE_D6_DLC_ENABLE);
/* We have just updated the filter. */
sc->filter_change = 0;
#if FE_DEBUG >= 3
log(LOG_INFO, "%s: address filter changed\n", sc->sc_dev.dv_xname);
#endif
}
/*
* Enable power on the interface.
*/
int
mb86960_enable(sc)
struct mb86960_softc *sc;
{
#if FE_DEBUG >= 3
log(LOG_INFO, "%s: mb86960_enable()\n", sc->sc_dev.dv_xname);
#endif
if (sc->sc_enabled == 0 && sc->sc_enable != NULL) {
if ((*sc->sc_enable)(sc) != 0) {
printf("%s: device enable failed\n",
sc->sc_dev.dv_xname);
return (EIO);
}
}
sc->sc_enabled = 1;
return (0);
}
/*
* Disable power on the interface.
*/
void
mb86960_disable(sc)
struct mb86960_softc *sc;
{
#if FE_DEBUG >= 3
log(LOG_INFO, "%s: mb86960_disable()\n", sc->sc_dev.dv_xname);
#endif
if (sc->sc_enabled != 0 && sc->sc_disable != NULL) {
(*sc->sc_disable)(sc);
sc->sc_enabled = 0;
}
}
#if FE_DEBUG >= 1
void
mb86960_dump(level, sc)
int level;
struct mb86960_softc *sc;
{
bus_space_tag_t bst = sc->sc_bst;
bus_space_handle_t bsh = sc->sc_bsh;
u_char save_dlcr7;
save_dlcr7 = bus_space_read_1(bst, bsh, FE_DLCR7);
log(level, "\tDLCR = %02x %02x %02x %02x %02x %02x %02x %02x\n",
bus_space_read_1(bst, bsh, FE_DLCR0),
bus_space_read_1(bst, bsh, FE_DLCR1),
bus_space_read_1(bst, bsh, FE_DLCR2),
bus_space_read_1(bst, bsh, FE_DLCR3),
bus_space_read_1(bst, bsh, FE_DLCR4),
bus_space_read_1(bst, bsh, FE_DLCR5),
bus_space_read_1(bst, bsh, FE_DLCR6),
bus_space_read_1(bst, bsh, FE_DLCR7));
bus_space_write_1(bst, bsh, FE_DLCR7,
(save_dlcr7 & ~FE_D7_RBS) | FE_D7_RBS_DLCR);
log(level, "\t %02x %02x %02x %02x %02x %02x %02x %02x\n",
bus_space_read_1(bst, bsh, FE_DLCR8),
bus_space_read_1(bst, bsh, FE_DLCR9),
bus_space_read_1(bst, bsh, FE_DLCR10),
bus_space_read_1(bst, bsh, FE_DLCR11),
bus_space_read_1(bst, bsh, FE_DLCR12),
bus_space_read_1(bst, bsh, FE_DLCR13),
bus_space_read_1(bst, bsh, FE_DLCR14),
bus_space_read_1(bst, bsh, FE_DLCR15));
bus_space_write_1(bst, bsh, FE_DLCR7,
(save_dlcr7 & ~FE_D7_RBS) | FE_D7_RBS_MAR);
log(level, "\tMAR = %02x %02x %02x %02x %02x %02x %02x %02x\n",
bus_space_read_1(bst, bsh, FE_MAR8),
bus_space_read_1(bst, bsh, FE_MAR9),
bus_space_read_1(bst, bsh, FE_MAR10),
bus_space_read_1(bst, bsh, FE_MAR11),
bus_space_read_1(bst, bsh, FE_MAR12),
bus_space_read_1(bst, bsh, FE_MAR13),
bus_space_read_1(bst, bsh, FE_MAR14),
bus_space_read_1(bst, bsh, FE_MAR15));
bus_space_write_1(bst, bsh, FE_DLCR7,
(save_dlcr7 & ~FE_D7_RBS) | FE_D7_RBS_BMPR);
log(level,
"\tBMPR = xx xx %02x %02x %02x %02x %02x %02x %02x %02x xx %02x\n",
bus_space_read_1(bst, bsh, FE_BMPR10),
bus_space_read_1(bst, bsh, FE_BMPR11),
bus_space_read_1(bst, bsh, FE_BMPR12),
bus_space_read_1(bst, bsh, FE_BMPR13),
bus_space_read_1(bst, bsh, FE_BMPR14),
bus_space_read_1(bst, bsh, FE_BMPR15),
bus_space_read_1(bst, bsh, FE_BMPR16),
bus_space_read_1(bst, bsh, FE_BMPR17),
bus_space_read_1(bst, bsh, FE_BMPR19));
bus_space_write_1(bst, bsh, FE_DLCR7, save_dlcr7);
}
#endif
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