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freebsd-dev/sys/pci/if_fxp.c
Bill Paul 069363018f Fix a bug brought to light by the people working on SMPng. I don't quite 
understand exactly what it is about SMPng that tickles this bug. What I
do know is that the foo_init() routine in most drivers is often called
twice when an interface is brought up. One time is due to the ifconfig(8)
command calling the SIOCSIFFLAGS ioctl to set the IFF_UP flag, and another
is probably due to the kernel calling ifp->if_init at some point. In any
case, the SMPng changes seem to affect the timing of these two events in
such a way that there is a significant delay before any packets are sent
onto the wire after the interface is first brought up. This manifested
itself locally as an SMPng test machine which failed to obtain an address
via DHCP when booting up.

It looks like the second call to fxp_init() is happening faster now than
it did before, and I think it catches the chip while it's in the process
of dealing with the configuration command from the first call. Whatever
the case, a FXP_CSR_SCB_CNA interrupt event is now generated shortly after
the second fxp_init() call. (This interrupt is apparently never generated
by a non-SMPng kernel, so nobody noticed.)

There are two problems with this: first, fxp_intr() does not handle the
FXP_CSR_SCB_CNA interrupt event (it never tests for it or does anything
to deal with it), and second, the meaning of FXP_CSR_SCB_CNA is not
documented in the driver. (Apparently it means "command unit not active.")
Bad coder. No biscuit.

The fix is to have the FXP_CSR_SCB_CNA interrupt handled just like the
FXP_SCB_STATACK_CXTNO interrupt. This prevents the state machine for
the configuration/RX filter programming stuff from getting wedged for
several seconds and preventing packet transmission.

Noticed by: jhb
2000-08-11 17:47:55 +00:00

2060 lines
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/*
* Copyright (c) 1995, David Greenman
* All rights reserved.
*
* Modifications to support NetBSD and media selection:
* Copyright (c) 1997 Jason R. Thorpe. 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 unmodified, 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.
*
* $FreeBSD$
*/
/*
* Intel EtherExpress Pro/100B PCI Fast Ethernet driver
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/mbuf.h>
#include <sys/malloc.h>
#include <sys/kernel.h>
#include <sys/socket.h>
#include <net/if.h>
#include <net/if_dl.h>
#include <net/if_media.h>
#ifdef NS
#include <netns/ns.h>
#include <netns/ns_if.h>
#endif
#include <net/bpf.h>
#if defined(__NetBSD__)
#include <sys/ioctl.h>
#include <sys/errno.h>
#include <sys/device.h>
#include <net/if_dl.h>
#include <net/if_ether.h>
#include <netinet/if_inarp.h>
#include <vm/vm.h>
#include <machine/cpu.h>
#include <machine/bus.h>
#include <machine/intr.h>
#include <dev/pci/if_fxpreg.h>
#include <dev/pci/if_fxpvar.h>
#include <dev/pci/pcivar.h>
#include <dev/pci/pcireg.h>
#include <dev/pci/pcidevs.h>
#else /* __FreeBSD__ */
#include <sys/sockio.h>
#include <sys/bus.h>
#include <machine/bus.h>
#include <sys/rman.h>
#include <machine/resource.h>
#include <net/ethernet.h>
#include <net/if_arp.h>
#include <vm/vm.h> /* for vtophys */
#include <vm/pmap.h> /* for vtophys */
#include <machine/clock.h> /* for DELAY */
#include <pci/pcivar.h>
#include <pci/pcireg.h> /* for PCIM_CMD_xxx */
#include <pci/if_fxpreg.h>
#include <pci/if_fxpvar.h>
#endif /* __NetBSD__ */
#ifdef __alpha__ /* XXX */
/* XXX XXX NEED REAL DMA MAPPING SUPPORT XXX XXX */
#undef vtophys
#define vtophys(va) alpha_XXX_dmamap((vm_offset_t)(va))
#endif /* __alpha__ */
/*
* NOTE! On the Alpha, we have an alignment constraint. The
* card DMAs the packet immediately following the RFA. However,
* the first thing in the packet is a 14-byte Ethernet header.
* This means that the packet is misaligned. To compensate,
* we actually offset the RFA 2 bytes into the cluster. This
* alignes the packet after the Ethernet header at a 32-bit
* boundary. HOWEVER! This means that the RFA is misaligned!
*/
#define RFA_ALIGNMENT_FUDGE 2
/*
* Inline function to copy a 16-bit aligned 32-bit quantity.
*/
static __inline void fxp_lwcopy __P((volatile u_int32_t *,
volatile u_int32_t *));
static __inline void
fxp_lwcopy(src, dst)
volatile u_int32_t *src, *dst;
{
#ifdef __i386__
*dst = *src;
#else
volatile u_int16_t *a = (volatile u_int16_t *)src;
volatile u_int16_t *b = (volatile u_int16_t *)dst;
b[0] = a[0];
b[1] = a[1];
#endif
}
/*
* Template for default configuration parameters.
* See struct fxp_cb_config for the bit definitions.
*/
static u_char fxp_cb_config_template[] = {
0x0, 0x0, /* cb_status */
0x80, 0x2, /* cb_command */
0xff, 0xff, 0xff, 0xff, /* link_addr */
0x16, /* 0 */
0x8, /* 1 */
0x0, /* 2 */
0x0, /* 3 */
0x0, /* 4 */
0x80, /* 5 */
0xb2, /* 6 */
0x3, /* 7 */
0x1, /* 8 */
0x0, /* 9 */
0x26, /* 10 */
0x0, /* 11 */
0x60, /* 12 */
0x0, /* 13 */
0xf2, /* 14 */
0x48, /* 15 */
0x0, /* 16 */
0x40, /* 17 */
0xf3, /* 18 */
0x0, /* 19 */
0x3f, /* 20 */
0x5 /* 21 */
};
/* Supported media types. */
struct fxp_supported_media {
const int fsm_phy; /* PHY type */
const int *fsm_media; /* the media array */
const int fsm_nmedia; /* the number of supported media */
const int fsm_defmedia; /* default media for this PHY */
};
static const int fxp_media_standard[] = {
IFM_ETHER|IFM_10_T,
IFM_ETHER|IFM_10_T|IFM_FDX,
IFM_ETHER|IFM_100_TX,
IFM_ETHER|IFM_100_TX|IFM_FDX,
IFM_ETHER|IFM_AUTO,
};
#define FXP_MEDIA_STANDARD_DEFMEDIA (IFM_ETHER|IFM_AUTO)
static const int fxp_media_default[] = {
IFM_ETHER|IFM_MANUAL, /* XXX IFM_AUTO ? */
};
#define FXP_MEDIA_DEFAULT_DEFMEDIA (IFM_ETHER|IFM_MANUAL)
static const struct fxp_supported_media fxp_media[] = {
{ FXP_PHY_DP83840, fxp_media_standard,
sizeof(fxp_media_standard) / sizeof(fxp_media_standard[0]),
FXP_MEDIA_STANDARD_DEFMEDIA },
{ FXP_PHY_DP83840A, fxp_media_standard,
sizeof(fxp_media_standard) / sizeof(fxp_media_standard[0]),
FXP_MEDIA_STANDARD_DEFMEDIA },
{ FXP_PHY_82553A, fxp_media_standard,
sizeof(fxp_media_standard) / sizeof(fxp_media_standard[0]),
FXP_MEDIA_STANDARD_DEFMEDIA },
{ FXP_PHY_82553C, fxp_media_standard,
sizeof(fxp_media_standard) / sizeof(fxp_media_standard[0]),
FXP_MEDIA_STANDARD_DEFMEDIA },
{ FXP_PHY_82555, fxp_media_standard,
sizeof(fxp_media_standard) / sizeof(fxp_media_standard[0]),
FXP_MEDIA_STANDARD_DEFMEDIA },
{ FXP_PHY_82555B, fxp_media_standard,
sizeof(fxp_media_standard) / sizeof(fxp_media_standard[0]),
FXP_MEDIA_STANDARD_DEFMEDIA },
{ FXP_PHY_80C24, fxp_media_default,
sizeof(fxp_media_default) / sizeof(fxp_media_default[0]),
FXP_MEDIA_DEFAULT_DEFMEDIA },
};
#define NFXPMEDIA (sizeof(fxp_media) / sizeof(fxp_media[0]))
static int fxp_mediachange __P((struct ifnet *));
static void fxp_mediastatus __P((struct ifnet *, struct ifmediareq *));
static void fxp_set_media __P((struct fxp_softc *, int));
static __inline void fxp_scb_wait __P((struct fxp_softc *));
static FXP_INTR_TYPE fxp_intr __P((void *));
static void fxp_start __P((struct ifnet *));
static int fxp_ioctl __P((struct ifnet *,
FXP_IOCTLCMD_TYPE, caddr_t));
static void fxp_init __P((void *));
static void fxp_stop __P((struct fxp_softc *));
static void fxp_watchdog __P((struct ifnet *));
static int fxp_add_rfabuf __P((struct fxp_softc *, struct mbuf *));
static int fxp_mdi_read __P((struct fxp_softc *, int, int));
static void fxp_mdi_write __P((struct fxp_softc *, int, int, int));
static void fxp_autosize_eeprom __P((struct fxp_softc *));
static void fxp_read_eeprom __P((struct fxp_softc *, u_int16_t *,
int, int));
static int fxp_attach_common __P((struct fxp_softc *, u_int8_t *));
static void fxp_stats_update __P((void *));
static void fxp_mc_setup __P((struct fxp_softc *));
/*
* Set initial transmit threshold at 64 (512 bytes). This is
* increased by 64 (512 bytes) at a time, to maximum of 192
* (1536 bytes), if an underrun occurs.
*/
static int tx_threshold = 64;
/*
* Number of transmit control blocks. This determines the number
* of transmit buffers that can be chained in the CB list.
* This must be a power of two.
*/
#define FXP_NTXCB 128
/*
* Number of completed TX commands at which point an interrupt
* will be generated to garbage collect the attached buffers.
* Must be at least one less than FXP_NTXCB, and should be
* enough less so that the transmitter doesn't becomes idle
* during the buffer rundown (which would reduce performance).
*/
#define FXP_CXINT_THRESH 120
/*
* TxCB list index mask. This is used to do list wrap-around.
*/
#define FXP_TXCB_MASK (FXP_NTXCB - 1)
/*
* Number of receive frame area buffers. These are large so chose
* wisely.
*/
#define FXP_NRFABUFS 64
/*
* Maximum number of seconds that the receiver can be idle before we
* assume it's dead and attempt to reset it by reprogramming the
* multicast filter. This is part of a work-around for a bug in the
* NIC. See fxp_stats_update().
*/
#define FXP_MAX_RX_IDLE 15
/*
* Wait for the previous command to be accepted (but not necessarily
* completed).
*/
static __inline void
fxp_scb_wait(sc)
struct fxp_softc *sc;
{
int i = 10000;
while (CSR_READ_1(sc, FXP_CSR_SCB_COMMAND) && --i);
}
/*************************************************************
* Operating system-specific autoconfiguration glue
*************************************************************/
#if defined(__NetBSD__)
#ifdef __BROKEN_INDIRECT_CONFIG
static int fxp_match __P((struct device *, void *, void *));
#else
static int fxp_match __P((struct device *, struct cfdata *, void *));
#endif
static void fxp_attach __P((struct device *, struct device *, void *));
static void fxp_shutdown __P((void *));
/* Compensate for lack of a generic ether_ioctl() */
static int fxp_ether_ioctl __P((struct ifnet *,
FXP_IOCTLCMD_TYPE, caddr_t));
#define ether_ioctl fxp_ether_ioctl
struct cfattach fxp_ca = {
sizeof(struct fxp_softc), fxp_match, fxp_attach
};
struct cfdriver fxp_cd = {
NULL, "fxp", DV_IFNET
};
/*
* Check if a device is an 82557.
*/
static int
fxp_match(parent, match, aux)
struct device *parent;
#ifdef __BROKEN_INDIRECT_CONFIG
void *match;
#else
struct cfdata *match;
#endif
void *aux;
{
struct pci_attach_args *pa = aux;
if (PCI_VENDOR(pa->pa_id) != PCI_VENDOR_INTEL)
return (0);
switch (PCI_PRODUCT(pa->pa_id)) {
case PCI_PRODUCT_INTEL_82557:
return (1);
}
return (0);
}
static void
fxp_attach(parent, self, aux)
struct device *parent, *self;
void *aux;
{
struct fxp_softc *sc = (struct fxp_softc *)self;
struct pci_attach_args *pa = aux;
pci_chipset_tag_t pc = pa->pa_pc;
pci_intr_handle_t ih;
const char *intrstr = NULL;
u_int8_t enaddr[6];
struct ifnet *ifp;
/*
* Map control/status registers.
*/
if (pci_mapreg_map(pa, FXP_PCI_MMBA, PCI_MAPREG_TYPE_MEM, 0,
&sc->sc_st, &sc->sc_sh, NULL, NULL)) {
printf(": can't map registers\n");
return;
}
printf(": Intel EtherExpress Pro 10/100B Ethernet\n");
/*
* Allocate our interrupt.
*/
if (pci_intr_map(pc, pa->pa_intrtag, pa->pa_intrpin,
pa->pa_intrline, &ih)) {
printf("%s: couldn't map interrupt\n", sc->sc_dev.dv_xname);
return;
}
intrstr = pci_intr_string(pc, ih);
sc->sc_ih = pci_intr_establish(pc, ih, IPL_NET, fxp_intr, sc);
if (sc->sc_ih == NULL) {
printf("%s: couldn't establish interrupt",
sc->sc_dev.dv_xname);
if (intrstr != NULL)
printf(" at %s", intrstr);
printf("\n");
return;
}
printf("%s: interrupting at %s\n", sc->sc_dev.dv_xname, intrstr);
/* Do generic parts of attach. */
if (fxp_attach_common(sc, enaddr)) {
/* Failed! */
return;
}
printf("%s: Ethernet address %s%s\n", sc->sc_dev.dv_xname,
ether_sprintf(enaddr), sc->phy_10Mbps_only ? ", 10Mbps" : "");
ifp = &sc->sc_ethercom.ec_if;
bcopy(sc->sc_dev.dv_xname, ifp->if_xname, IFNAMSIZ);
ifp->if_softc = sc;
ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST;
ifp->if_ioctl = fxp_ioctl;
ifp->if_start = fxp_start;
ifp->if_watchdog = fxp_watchdog;
/*
* Attach the interface.
*/
if_attach(ifp);
/*
* Let the system queue as many packets as we have available
* TX descriptors.
*/
ifp->if_snd.ifq_maxlen = FXP_NTXCB - 1;
ether_ifattach(ifp, enaddr);
bpfattach(&sc->sc_ethercom.ec_if.if_bpf, ifp, DLT_EN10MB,
sizeof(struct ether_header));
/*
* Add shutdown hook so that DMA is disabled prior to reboot. Not
* doing do could allow DMA to corrupt kernel memory during the
* reboot before the driver initializes.
*/
shutdownhook_establish(fxp_shutdown, sc);
}
/*
* Device shutdown routine. Called at system shutdown after sync. The
* main purpose of this routine is to shut off receiver DMA so that
* kernel memory doesn't get clobbered during warmboot.
*/
static void
fxp_shutdown(sc)
void *sc;
{
fxp_stop((struct fxp_softc *) sc);
}
static int
fxp_ether_ioctl(ifp, cmd, data)
struct ifnet *ifp;
FXP_IOCTLCMD_TYPE cmd;
caddr_t data;
{
struct ifaddr *ifa = (struct ifaddr *) data;
struct fxp_softc *sc = ifp->if_softc;
switch (cmd) {
case SIOCSIFADDR:
ifp->if_flags |= IFF_UP;
switch (ifa->ifa_addr->sa_family) {
#ifdef INET
case AF_INET:
fxp_init(sc);
arp_ifinit(ifp, ifa);
break;
#endif
#ifdef NS
case AF_NS:
{
register struct ns_addr *ina = &IA_SNS(ifa)->sns_addr;
if (ns_nullhost(*ina))
ina->x_host = *(union ns_host *)
LLADDR(ifp->if_sadl);
else
bcopy(ina->x_host.c_host, LLADDR(ifp->if_sadl),
ifp->if_addrlen);
/* Set new address. */
fxp_init(sc);
break;
}
#endif
default:
fxp_init(sc);
break;
}
break;
default:
return (EINVAL);
}
return (0);
}
#else /* __FreeBSD__ */
/*
* Return identification string if this is device is ours.
*/
static int
fxp_probe(device_t dev)
{
if (pci_get_vendor(dev) == FXP_VENDORID_INTEL) {
switch (pci_get_device(dev)) {
case FXP_DEVICEID_i82557:
device_set_desc(dev, "Intel Pro 10/100B/100+ Ethernet");
return 0;
case FXP_DEVICEID_i82559:
device_set_desc(dev, "Intel InBusiness 10/100 Ethernet");
return 0;
case FXP_DEVICEID_i82559ER:
device_set_desc(dev, "Intel Embedded 10/100 Ethernet");
return 0;
default:
break;
}
}
return ENXIO;
}
static int
fxp_attach(device_t dev)
{
int error = 0;
struct fxp_softc *sc = device_get_softc(dev);
struct ifnet *ifp;
int s;
u_long val;
int rid;
callout_handle_init(&sc->stat_ch);
s = splimp();
/*
* Enable bus mastering.
*/
val = pci_read_config(dev, PCIR_COMMAND, 2);
val |= (PCIM_CMD_MEMEN|PCIM_CMD_BUSMASTEREN);
pci_write_config(dev, PCIR_COMMAND, val, 2);
/*
* Map control/status registers.
*/
rid = FXP_PCI_MMBA;
sc->mem = bus_alloc_resource(dev, SYS_RES_MEMORY, &rid,
0, ~0, 1, RF_ACTIVE);
if (!sc->mem) {
device_printf(dev, "could not map memory\n");
error = ENXIO;
goto fail;
}
sc->sc_st = rman_get_bustag(sc->mem);
sc->sc_sh = rman_get_bushandle(sc->mem);
/*
* Allocate our interrupt.
*/
rid = 0;
sc->irq = bus_alloc_resource(dev, SYS_RES_IRQ, &rid, 0, ~0, 1,
RF_SHAREABLE | RF_ACTIVE);
if (sc->irq == NULL) {
device_printf(dev, "could not map interrupt\n");
error = ENXIO;
goto fail;
}
error = bus_setup_intr(dev, sc->irq, INTR_TYPE_NET,
fxp_intr, sc, &sc->ih);
if (error) {
device_printf(dev, "could not setup irq\n");
goto fail;
}
/* Do generic parts of attach. */
if (fxp_attach_common(sc, sc->arpcom.ac_enaddr)) {
/* Failed! */
bus_teardown_intr(dev, sc->irq, sc->ih);
bus_release_resource(dev, SYS_RES_IRQ, 0, sc->irq);
bus_release_resource(dev, SYS_RES_MEMORY, FXP_PCI_MMBA, sc->mem);
error = ENXIO;
goto fail;
}
device_printf(dev, "Ethernet address %6D%s\n",
sc->arpcom.ac_enaddr, ":", sc->phy_10Mbps_only ? ", 10Mbps" : "");
ifp = &sc->arpcom.ac_if;
ifp->if_unit = device_get_unit(dev);
ifp->if_name = "fxp";
ifp->if_output = ether_output;
ifp->if_baudrate = 100000000;
ifp->if_init = fxp_init;
ifp->if_softc = sc;
ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST;
ifp->if_ioctl = fxp_ioctl;
ifp->if_start = fxp_start;
ifp->if_watchdog = fxp_watchdog;
/*
* Attach the interface.
*/
ether_ifattach(ifp, ETHER_BPF_SUPPORTED);
/*
* Let the system queue as many packets as we have available
* TX descriptors.
*/
ifp->if_snd.ifq_maxlen = FXP_NTXCB - 1;
splx(s);
return 0;
fail:
splx(s);
return error;
}
/*
* Detach interface.
*/
static int
fxp_detach(device_t dev)
{
struct fxp_softc *sc = device_get_softc(dev);
int s;
s = splimp();
/*
* Close down routes etc.
*/
ether_ifdetach(&sc->arpcom.ac_if, ETHER_BPF_SUPPORTED);
/*
* Stop DMA and drop transmit queue.
*/
fxp_stop(sc);
/*
* Deallocate resources.
*/
bus_teardown_intr(dev, sc->irq, sc->ih);
bus_release_resource(dev, SYS_RES_IRQ, 0, sc->irq);
bus_release_resource(dev, SYS_RES_MEMORY, FXP_PCI_MMBA, sc->mem);
/*
* Free all the receive buffers.
*/
if (sc->rfa_headm != NULL)
m_freem(sc->rfa_headm);
/*
* Free all media structures.
*/
ifmedia_removeall(&sc->sc_media);
/*
* Free anciliary structures.
*/
free(sc->cbl_base, M_DEVBUF);
free(sc->fxp_stats, M_DEVBUF);
free(sc->mcsp, M_DEVBUF);
splx(s);
return 0;
}
/*
* Device shutdown routine. Called at system shutdown after sync. The
* main purpose of this routine is to shut off receiver DMA so that
* kernel memory doesn't get clobbered during warmboot.
*/
static int
fxp_shutdown(device_t dev)
{
/*
* Make sure that DMA is disabled prior to reboot. Not doing
* do could allow DMA to corrupt kernel memory during the
* reboot before the driver initializes.
*/
fxp_stop((struct fxp_softc *) device_get_softc(dev));
return 0;
}
static device_method_t fxp_methods[] = {
/* Device interface */
DEVMETHOD(device_probe, fxp_probe),
DEVMETHOD(device_attach, fxp_attach),
DEVMETHOD(device_detach, fxp_detach),
DEVMETHOD(device_shutdown, fxp_shutdown),
{ 0, 0 }
};
static driver_t fxp_driver = {
"fxp",
fxp_methods,
sizeof(struct fxp_softc),
};
static devclass_t fxp_devclass;
DRIVER_MODULE(if_fxp, pci, fxp_driver, fxp_devclass, 0, 0);
#endif /* __NetBSD__ */
/*************************************************************
* End of operating system-specific autoconfiguration glue
*************************************************************/
/*
* Do generic parts of attach.
*/
static int
fxp_attach_common(sc, enaddr)
struct fxp_softc *sc;
u_int8_t *enaddr;
{
u_int16_t data;
int i, nmedia, defmedia;
const int *media;
/*
* Reset to a stable state.
*/
CSR_WRITE_4(sc, FXP_CSR_PORT, FXP_PORT_SELECTIVE_RESET);
DELAY(10);
sc->cbl_base = malloc(sizeof(struct fxp_cb_tx) * FXP_NTXCB,
M_DEVBUF, M_NOWAIT);
if (sc->cbl_base == NULL)
goto fail;
bzero(sc->cbl_base, sizeof(struct fxp_cb_tx) * FXP_NTXCB);
sc->fxp_stats = malloc(sizeof(struct fxp_stats), M_DEVBUF, M_NOWAIT);
if (sc->fxp_stats == NULL)
goto fail;
bzero(sc->fxp_stats, sizeof(struct fxp_stats));
sc->mcsp = malloc(sizeof(struct fxp_cb_mcs), M_DEVBUF, M_NOWAIT);
if (sc->mcsp == NULL)
goto fail;
/*
* Pre-allocate our receive buffers.
*/
for (i = 0; i < FXP_NRFABUFS; i++) {
if (fxp_add_rfabuf(sc, NULL) != 0) {
goto fail;
}
}
/*
* Find out how large of an SEEPROM we have.
*/
fxp_autosize_eeprom(sc);
/*
* Get info about the primary PHY
*/
fxp_read_eeprom(sc, (u_int16_t *)&data, 6, 1);
sc->phy_primary_addr = data & 0xff;
sc->phy_primary_device = (data >> 8) & 0x3f;
sc->phy_10Mbps_only = data >> 15;
/*
* Read MAC address.
*/
fxp_read_eeprom(sc, (u_int16_t *)enaddr, 0, 3);
/*
* Initialize the media structures.
*/
media = fxp_media_default;
nmedia = sizeof(fxp_media_default) / sizeof(fxp_media_default[0]);
defmedia = FXP_MEDIA_DEFAULT_DEFMEDIA;
for (i = 0; i < NFXPMEDIA; i++) {
if (sc->phy_primary_device == fxp_media[i].fsm_phy) {
media = fxp_media[i].fsm_media;
nmedia = fxp_media[i].fsm_nmedia;
defmedia = fxp_media[i].fsm_defmedia;
}
}
ifmedia_init(&sc->sc_media, 0, fxp_mediachange, fxp_mediastatus);
for (i = 0; i < nmedia; i++) {
if (IFM_SUBTYPE(media[i]) == IFM_100_TX && sc->phy_10Mbps_only)
continue;
ifmedia_add(&sc->sc_media, media[i], 0, NULL);
}
ifmedia_set(&sc->sc_media, defmedia);
return (0);
fail:
printf(FXP_FORMAT ": Failed to malloc memory\n", FXP_ARGS(sc));
if (sc->cbl_base)
free(sc->cbl_base, M_DEVBUF);
if (sc->fxp_stats)
free(sc->fxp_stats, M_DEVBUF);
if (sc->mcsp)
free(sc->mcsp, M_DEVBUF);
/* frees entire chain */
if (sc->rfa_headm)
m_freem(sc->rfa_headm);
return (ENOMEM);
}
/*
* From NetBSD:
*
* Figure out EEPROM size.
*
* 559's can have either 64-word or 256-word EEPROMs, the 558
* datasheet only talks about 64-word EEPROMs, and the 557 datasheet
* talks about the existance of 16 to 256 word EEPROMs.
*
* The only known sizes are 64 and 256, where the 256 version is used
* by CardBus cards to store CIS information.
*
* The address is shifted in msb-to-lsb, and after the last
* address-bit the EEPROM is supposed to output a `dummy zero' bit,
* after which follows the actual data. We try to detect this zero, by
* probing the data-out bit in the EEPROM control register just after
* having shifted in a bit. If the bit is zero, we assume we've
* shifted enough address bits. The data-out should be tri-state,
* before this, which should translate to a logical one.
*
* Other ways to do this would be to try to read a register with known
* contents with a varying number of address bits, but no such
* register seem to be available. The high bits of register 10 are 01
* on the 558 and 559, but apparently not on the 557.
*
* The Linux driver computes a checksum on the EEPROM data, but the
* value of this checksum is not very well documented.
*/
static void
fxp_autosize_eeprom(sc)
struct fxp_softc *sc;
{
u_int16_t reg;
int x;
CSR_WRITE_2(sc, FXP_CSR_EEPROMCONTROL, FXP_EEPROM_EECS);
/*
* Shift in read opcode.
*/
for (x = 3; x > 0; x--) {
if (FXP_EEPROM_OPC_READ & (1 << (x - 1))) {
reg = FXP_EEPROM_EECS | FXP_EEPROM_EEDI;
} else {
reg = FXP_EEPROM_EECS;
}
CSR_WRITE_2(sc, FXP_CSR_EEPROMCONTROL, reg);
CSR_WRITE_2(sc, FXP_CSR_EEPROMCONTROL,
reg | FXP_EEPROM_EESK);
DELAY(1);
CSR_WRITE_2(sc, FXP_CSR_EEPROMCONTROL, reg);
DELAY(1);
}
/*
* Shift in address.
* Wait for the dummy zero following a correct address shift.
*/
for (x = 1; x <= 8; x++) {
CSR_WRITE_2(sc, FXP_CSR_EEPROMCONTROL, FXP_EEPROM_EECS);
CSR_WRITE_2(sc, FXP_CSR_EEPROMCONTROL,
FXP_EEPROM_EECS | FXP_EEPROM_EESK);
DELAY(1);
if ((CSR_READ_2(sc, FXP_CSR_EEPROMCONTROL) & FXP_EEPROM_EEDO) == 0)
break;
CSR_WRITE_2(sc, FXP_CSR_EEPROMCONTROL, FXP_EEPROM_EECS);
DELAY(1);
}
CSR_WRITE_2(sc, FXP_CSR_EEPROMCONTROL, 0);
DELAY(1);
sc->eeprom_size = x;
}
/*
* Read from the serial EEPROM. Basically, you manually shift in
* the read opcode (one bit at a time) and then shift in the address,
* and then you shift out the data (all of this one bit at a time).
* The word size is 16 bits, so you have to provide the address for
* every 16 bits of data.
*/
static void
fxp_read_eeprom(sc, data, offset, words)
struct fxp_softc *sc;
u_short *data;
int offset;
int words;
{
u_int16_t reg;
int i, x;
for (i = 0; i < words; i++) {
CSR_WRITE_2(sc, FXP_CSR_EEPROMCONTROL, FXP_EEPROM_EECS);
/*
* Shift in read opcode.
*/
for (x = 3; x > 0; x--) {
if (FXP_EEPROM_OPC_READ & (1 << (x - 1))) {
reg = FXP_EEPROM_EECS | FXP_EEPROM_EEDI;
} else {
reg = FXP_EEPROM_EECS;
}
CSR_WRITE_2(sc, FXP_CSR_EEPROMCONTROL, reg);
CSR_WRITE_2(sc, FXP_CSR_EEPROMCONTROL,
reg | FXP_EEPROM_EESK);
DELAY(1);
CSR_WRITE_2(sc, FXP_CSR_EEPROMCONTROL, reg);
DELAY(1);
}
/*
* Shift in address.
*/
for (x = sc->eeprom_size; x > 0; x--) {
if ((i + offset) & (1 << (x - 1))) {
reg = FXP_EEPROM_EECS | FXP_EEPROM_EEDI;
} else {
reg = FXP_EEPROM_EECS;
}
CSR_WRITE_2(sc, FXP_CSR_EEPROMCONTROL, reg);
CSR_WRITE_2(sc, FXP_CSR_EEPROMCONTROL,
reg | FXP_EEPROM_EESK);
DELAY(1);
CSR_WRITE_2(sc, FXP_CSR_EEPROMCONTROL, reg);
DELAY(1);
}
reg = FXP_EEPROM_EECS;
data[i] = 0;
/*
* Shift out data.
*/
for (x = 16; x > 0; x--) {
CSR_WRITE_2(sc, FXP_CSR_EEPROMCONTROL,
reg | FXP_EEPROM_EESK);
DELAY(1);
if (CSR_READ_2(sc, FXP_CSR_EEPROMCONTROL) &
FXP_EEPROM_EEDO)
data[i] |= (1 << (x - 1));
CSR_WRITE_2(sc, FXP_CSR_EEPROMCONTROL, reg);
DELAY(1);
}
CSR_WRITE_2(sc, FXP_CSR_EEPROMCONTROL, 0);
DELAY(1);
}
}
/*
* Start packet transmission on the interface.
*/
static void
fxp_start(ifp)
struct ifnet *ifp;
{
struct fxp_softc *sc = ifp->if_softc;
struct fxp_cb_tx *txp;
/*
* See if we need to suspend xmit until the multicast filter
* has been reprogrammed (which can only be done at the head
* of the command chain).
*/
if (sc->need_mcsetup)
return;
txp = NULL;
/*
* We're finished if there is nothing more to add to the list or if
* we're all filled up with buffers to transmit.
* NOTE: One TxCB is reserved to guarantee that fxp_mc_setup() can add
* a NOP command when needed.
*/
while (ifp->if_snd.ifq_head != NULL && sc->tx_queued < FXP_NTXCB - 1) {
struct mbuf *m, *mb_head;
int segment;
/*
* Grab a packet to transmit.
*/
IF_DEQUEUE(&ifp->if_snd, mb_head);
/*
* Get pointer to next available tx desc.
*/
txp = sc->cbl_last->next;
/*
* Go through each of the mbufs in the chain and initialize
* the transmit buffer descriptors with the physical address
* and size of the mbuf.
*/
tbdinit:
for (m = mb_head, segment = 0; m != NULL; m = m->m_next) {
if (m->m_len != 0) {
if (segment == FXP_NTXSEG)
break;
txp->tbd[segment].tb_addr =
vtophys(mtod(m, vm_offset_t));
txp->tbd[segment].tb_size = m->m_len;
segment++;
}
}
if (m != NULL) {
struct mbuf *mn;
/*
* We ran out of segments. We have to recopy this mbuf
* chain first. Bail out if we can't get the new buffers.
*/
MGETHDR(mn, M_DONTWAIT, MT_DATA);
if (mn == NULL) {
m_freem(mb_head);
break;
}
if (mb_head->m_pkthdr.len > MHLEN) {
MCLGET(mn, M_DONTWAIT);
if ((mn->m_flags & M_EXT) == 0) {
m_freem(mn);
m_freem(mb_head);
break;
}
}
m_copydata(mb_head, 0, mb_head->m_pkthdr.len,
mtod(mn, caddr_t));
mn->m_pkthdr.len = mn->m_len = mb_head->m_pkthdr.len;
m_freem(mb_head);
mb_head = mn;
goto tbdinit;
}
txp->tbd_number = segment;
txp->mb_head = mb_head;
txp->cb_status = 0;
if (sc->tx_queued != FXP_CXINT_THRESH - 1) {
txp->cb_command =
FXP_CB_COMMAND_XMIT | FXP_CB_COMMAND_SF | FXP_CB_COMMAND_S;
} else {
txp->cb_command =
FXP_CB_COMMAND_XMIT | FXP_CB_COMMAND_SF | FXP_CB_COMMAND_S | FXP_CB_COMMAND_I;
/*
* Set a 5 second timer just in case we don't hear from the
* card again.
*/
ifp->if_timer = 5;
}
txp->tx_threshold = tx_threshold;
/*
* Advance the end of list forward.
*/
#ifdef __alpha__
/*
* On platforms which can't access memory in 16-bit
* granularities, we must prevent the card from DMA'ing
* up the status while we update the command field.
* This could cause us to overwrite the completion status.
*/
atomic_clear_short(&sc->cbl_last->cb_command,
FXP_CB_COMMAND_S);
#else
sc->cbl_last->cb_command &= ~FXP_CB_COMMAND_S;
#endif /*__alpha__*/
sc->cbl_last = txp;
/*
* Advance the beginning of the list forward if there are
* no other packets queued (when nothing is queued, cbl_first
* sits on the last TxCB that was sent out).
*/
if (sc->tx_queued == 0)
sc->cbl_first = txp;
sc->tx_queued++;
/*
* Pass packet to bpf if there is a listener.
*/
if (ifp->if_bpf)
bpf_mtap(FXP_BPFTAP_ARG(ifp), mb_head);
}
/*
* We're finished. If we added to the list, issue a RESUME to get DMA
* going again if suspended.
*/
if (txp != NULL) {
fxp_scb_wait(sc);
CSR_WRITE_1(sc, FXP_CSR_SCB_COMMAND, FXP_SCB_COMMAND_CU_RESUME);
}
}
/*
* Process interface interrupts.
*/
static FXP_INTR_TYPE
fxp_intr(arg)
void *arg;
{
struct fxp_softc *sc = arg;
struct ifnet *ifp = &sc->sc_if;
u_int8_t statack;
#if defined(__NetBSD__)
int claimed = 0;
#endif
while ((statack = CSR_READ_1(sc, FXP_CSR_SCB_STATACK)) != 0) {
#if defined(__NetBSD__)
claimed = 1;
#endif
/*
* First ACK all the interrupts in this pass.
*/
CSR_WRITE_1(sc, FXP_CSR_SCB_STATACK, statack);
/*
* Free any finished transmit mbuf chains.
*
* Handle the CNA event likt a CXTNO event. It used to
* be that this event (control unit not ready) was not
* encountered, but it is now with the SMPng modifications.
* The exact sequence of events that occur when the interface
* is brought up are different now, and if this event
* goes unhandled, the configuration/rxfilter setup sequence
* can stall for several seconds. The result is that no
* packets go out onto the wire for about 5 to 10 seconds
* after the interface is ifconfig'ed for the first time.
*/
if (statack & (FXP_SCB_STATACK_CXTNO | FXP_SCB_STATACK_CNA)) {
struct fxp_cb_tx *txp;
for (txp = sc->cbl_first; sc->tx_queued &&
(txp->cb_status & FXP_CB_STATUS_C) != 0;
txp = txp->next) {
if (txp->mb_head != NULL) {
m_freem(txp->mb_head);
txp->mb_head = NULL;
}
sc->tx_queued--;
}
sc->cbl_first = txp;
ifp->if_timer = 0;
if (sc->tx_queued == 0) {
if (sc->need_mcsetup)
fxp_mc_setup(sc);
}
/*
* Try to start more packets transmitting.
*/
if (ifp->if_snd.ifq_head != NULL)
fxp_start(ifp);
}
/*
* Process receiver interrupts. If a no-resource (RNR)
* condition exists, get whatever packets we can and
* re-start the receiver.
*/
if (statack & (FXP_SCB_STATACK_FR | FXP_SCB_STATACK_RNR)) {
struct mbuf *m;
struct fxp_rfa *rfa;
rcvloop:
m = sc->rfa_headm;
rfa = (struct fxp_rfa *)(m->m_ext.ext_buf +
RFA_ALIGNMENT_FUDGE);
if (rfa->rfa_status & FXP_RFA_STATUS_C) {
/*
* Remove first packet from the chain.
*/
sc->rfa_headm = m->m_next;
m->m_next = NULL;
/*
* Add a new buffer to the receive chain.
* If this fails, the old buffer is recycled
* instead.
*/
if (fxp_add_rfabuf(sc, m) == 0) {
struct ether_header *eh;
int total_len;
total_len = rfa->actual_size &
(MCLBYTES - 1);
if (total_len <
sizeof(struct ether_header)) {
m_freem(m);
goto rcvloop;
}
m->m_pkthdr.rcvif = ifp;
m->m_pkthdr.len = m->m_len = total_len;
eh = mtod(m, struct ether_header *);
m->m_data +=
sizeof(struct ether_header);
m->m_len -=
sizeof(struct ether_header);
m->m_pkthdr.len = m->m_len;
ether_input(ifp, eh, m);
}
goto rcvloop;
}
if (statack & FXP_SCB_STATACK_RNR) {
fxp_scb_wait(sc);
CSR_WRITE_4(sc, FXP_CSR_SCB_GENERAL,
vtophys(sc->rfa_headm->m_ext.ext_buf) +
RFA_ALIGNMENT_FUDGE);
CSR_WRITE_1(sc, FXP_CSR_SCB_COMMAND,
FXP_SCB_COMMAND_RU_START);
}
}
}
#if defined(__NetBSD__)
return (claimed);
#endif
}
/*
* Update packet in/out/collision statistics. The i82557 doesn't
* allow you to access these counters without doing a fairly
* expensive DMA to get _all_ of the statistics it maintains, so
* we do this operation here only once per second. The statistics
* counters in the kernel are updated from the previous dump-stats
* DMA and then a new dump-stats DMA is started. The on-chip
* counters are zeroed when the DMA completes. If we can't start
* the DMA immediately, we don't wait - we just prepare to read
* them again next time.
*/
static void
fxp_stats_update(arg)
void *arg;
{
struct fxp_softc *sc = arg;
struct ifnet *ifp = &sc->sc_if;
struct fxp_stats *sp = sc->fxp_stats;
struct fxp_cb_tx *txp;
int s;
ifp->if_opackets += sp->tx_good;
ifp->if_collisions += sp->tx_total_collisions;
if (sp->rx_good) {
ifp->if_ipackets += sp->rx_good;
sc->rx_idle_secs = 0;
} else {
/*
* Receiver's been idle for another second.
*/
sc->rx_idle_secs++;
}
ifp->if_ierrors +=
sp->rx_crc_errors +
sp->rx_alignment_errors +
sp->rx_rnr_errors +
sp->rx_overrun_errors;
/*
* If any transmit underruns occured, bump up the transmit
* threshold by another 512 bytes (64 * 8).
*/
if (sp->tx_underruns) {
ifp->if_oerrors += sp->tx_underruns;
if (tx_threshold < 192)
tx_threshold += 64;
}
s = splimp();
/*
* Release any xmit buffers that have completed DMA. This isn't
* strictly necessary to do here, but it's advantagous for mbufs
* with external storage to be released in a timely manner rather
* than being defered for a potentially long time. This limits
* the delay to a maximum of one second.
*/
for (txp = sc->cbl_first; sc->tx_queued &&
(txp->cb_status & FXP_CB_STATUS_C) != 0;
txp = txp->next) {
if (txp->mb_head != NULL) {
m_freem(txp->mb_head);
txp->mb_head = NULL;
}
sc->tx_queued--;
}
sc->cbl_first = txp;
/*
* If we haven't received any packets in FXP_MAC_RX_IDLE seconds,
* then assume the receiver has locked up and attempt to clear
* the condition by reprogramming the multicast filter. This is
* a work-around for a bug in the 82557 where the receiver locks
* up if it gets certain types of garbage in the syncronization
* bits prior to the packet header. This bug is supposed to only
* occur in 10Mbps mode, but has been seen to occur in 100Mbps
* mode as well (perhaps due to a 10/100 speed transition).
*/
if (sc->rx_idle_secs > FXP_MAX_RX_IDLE) {
sc->rx_idle_secs = 0;
fxp_mc_setup(sc);
}
/*
* If there is no pending command, start another stats
* dump. Otherwise punt for now.
*/
if (CSR_READ_1(sc, FXP_CSR_SCB_COMMAND) == 0) {
/*
* Start another stats dump.
*/
CSR_WRITE_1(sc, FXP_CSR_SCB_COMMAND,
FXP_SCB_COMMAND_CU_DUMPRESET);
} else {
/*
* A previous command is still waiting to be accepted.
* Just zero our copy of the stats and wait for the
* next timer event to update them.
*/
sp->tx_good = 0;
sp->tx_underruns = 0;
sp->tx_total_collisions = 0;
sp->rx_good = 0;
sp->rx_crc_errors = 0;
sp->rx_alignment_errors = 0;
sp->rx_rnr_errors = 0;
sp->rx_overrun_errors = 0;
}
splx(s);
/*
* Schedule another timeout one second from now.
*/
sc->stat_ch = timeout(fxp_stats_update, sc, hz);
}
/*
* Stop the interface. Cancels the statistics updater and resets
* the interface.
*/
static void
fxp_stop(sc)
struct fxp_softc *sc;
{
struct ifnet *ifp = &sc->sc_if;
struct fxp_cb_tx *txp;
int i;
/*
* Cancel stats updater.
*/
untimeout(fxp_stats_update, sc, sc->stat_ch);
/*
* Issue software reset
*/
CSR_WRITE_4(sc, FXP_CSR_PORT, FXP_PORT_SELECTIVE_RESET);
DELAY(10);
/*
* Release any xmit buffers.
*/
txp = sc->cbl_base;
if (txp != NULL) {
for (i = 0; i < FXP_NTXCB; i++) {
if (txp[i].mb_head != NULL) {
m_freem(txp[i].mb_head);
txp[i].mb_head = NULL;
}
}
}
sc->tx_queued = 0;
/*
* Free all the receive buffers then reallocate/reinitialize
*/
if (sc->rfa_headm != NULL)
m_freem(sc->rfa_headm);
sc->rfa_headm = NULL;
sc->rfa_tailm = NULL;
for (i = 0; i < FXP_NRFABUFS; i++) {
if (fxp_add_rfabuf(sc, NULL) != 0) {
/*
* This "can't happen" - we're at splimp()
* and we just freed all the buffers we need
* above.
*/
panic("fxp_stop: no buffers!");
}
}
ifp->if_flags &= ~(IFF_RUNNING | IFF_OACTIVE);
ifp->if_timer = 0;
}
/*
* Watchdog/transmission transmit timeout handler. Called when a
* transmission is started on the interface, but no interrupt is
* received before the timeout. This usually indicates that the
* card has wedged for some reason.
*/
static void
fxp_watchdog(ifp)
struct ifnet *ifp;
{
struct fxp_softc *sc = ifp->if_softc;
printf(FXP_FORMAT ": device timeout\n", FXP_ARGS(sc));
ifp->if_oerrors++;
fxp_init(sc);
}
static void
fxp_init(xsc)
void *xsc;
{
struct fxp_softc *sc = xsc;
struct ifnet *ifp = &sc->sc_if;
struct fxp_cb_config *cbp;
struct fxp_cb_ias *cb_ias;
struct fxp_cb_tx *txp;
int i, s, prm;
s = splimp();
/*
* Cancel any pending I/O
*/
fxp_stop(sc);
prm = (ifp->if_flags & IFF_PROMISC) ? 1 : 0;
/*
* Initialize base of CBL and RFA memory. Loading with zero
* sets it up for regular linear addressing.
*/
CSR_WRITE_4(sc, FXP_CSR_SCB_GENERAL, 0);
CSR_WRITE_1(sc, FXP_CSR_SCB_COMMAND, FXP_SCB_COMMAND_CU_BASE);
fxp_scb_wait(sc);
CSR_WRITE_1(sc, FXP_CSR_SCB_COMMAND, FXP_SCB_COMMAND_RU_BASE);
/*
* Initialize base of dump-stats buffer.
*/
fxp_scb_wait(sc);
CSR_WRITE_4(sc, FXP_CSR_SCB_GENERAL, vtophys(sc->fxp_stats));
CSR_WRITE_1(sc, FXP_CSR_SCB_COMMAND, FXP_SCB_COMMAND_CU_DUMP_ADR);
/*
* We temporarily use memory that contains the TxCB list to
* construct the config CB. The TxCB list memory is rebuilt
* later.
*/
cbp = (struct fxp_cb_config *) sc->cbl_base;
/*
* This bcopy is kind of disgusting, but there are a bunch of must be
* zero and must be one bits in this structure and this is the easiest
* way to initialize them all to proper values.
*/
bcopy(fxp_cb_config_template,
(void *)(uintptr_t)(volatile void *)&cbp->cb_status,
sizeof(fxp_cb_config_template));
cbp->cb_status = 0;
cbp->cb_command = FXP_CB_COMMAND_CONFIG | FXP_CB_COMMAND_EL;
cbp->link_addr = -1; /* (no) next command */
cbp->byte_count = 22; /* (22) bytes to config */
cbp->rx_fifo_limit = 8; /* rx fifo threshold (32 bytes) */
cbp->tx_fifo_limit = 0; /* tx fifo threshold (0 bytes) */
cbp->adaptive_ifs = 0; /* (no) adaptive interframe spacing */
cbp->rx_dma_bytecount = 0; /* (no) rx DMA max */
cbp->tx_dma_bytecount = 0; /* (no) tx DMA max */
cbp->dma_bce = 0; /* (disable) dma max counters */
cbp->late_scb = 0; /* (don't) defer SCB update */
cbp->tno_int = 0; /* (disable) tx not okay interrupt */
cbp->ci_int = 1; /* interrupt on CU idle */
cbp->save_bf = prm; /* save bad frames */
cbp->disc_short_rx = !prm; /* discard short packets */
cbp->underrun_retry = 1; /* retry mode (1) on DMA underrun */
cbp->mediatype = !sc->phy_10Mbps_only; /* interface mode */
cbp->nsai = 1; /* (don't) disable source addr insert */
cbp->preamble_length = 2; /* (7 byte) preamble */
cbp->loopback = 0; /* (don't) loopback */
cbp->linear_priority = 0; /* (normal CSMA/CD operation) */
cbp->linear_pri_mode = 0; /* (wait after xmit only) */
cbp->interfrm_spacing = 6; /* (96 bits of) interframe spacing */
cbp->promiscuous = prm; /* promiscuous mode */
cbp->bcast_disable = 0; /* (don't) disable broadcasts */
cbp->crscdt = 0; /* (CRS only) */
cbp->stripping = !prm; /* truncate rx packet to byte count */
cbp->padding = 1; /* (do) pad short tx packets */
cbp->rcv_crc_xfer = 0; /* (don't) xfer CRC to host */
cbp->force_fdx = 0; /* (don't) force full duplex */
cbp->fdx_pin_en = 1; /* (enable) FDX# pin */
cbp->multi_ia = 0; /* (don't) accept multiple IAs */
cbp->mc_all = sc->all_mcasts;/* accept all multicasts */
/*
* Start the config command/DMA.
*/
fxp_scb_wait(sc);
CSR_WRITE_4(sc, FXP_CSR_SCB_GENERAL, vtophys(&cbp->cb_status));
CSR_WRITE_1(sc, FXP_CSR_SCB_COMMAND, FXP_SCB_COMMAND_CU_START);
/* ...and wait for it to complete. */
while (!(cbp->cb_status & FXP_CB_STATUS_C));
/*
* Now initialize the station address. Temporarily use the TxCB
* memory area like we did above for the config CB.
*/
cb_ias = (struct fxp_cb_ias *) sc->cbl_base;
cb_ias->cb_status = 0;
cb_ias->cb_command = FXP_CB_COMMAND_IAS | FXP_CB_COMMAND_EL;
cb_ias->link_addr = -1;
#if defined(__NetBSD__)
bcopy(LLADDR(ifp->if_sadl), (void *)cb_ias->macaddr, 6);
#else
bcopy(sc->arpcom.ac_enaddr,
(void *)(uintptr_t)(volatile void *)cb_ias->macaddr,
sizeof(sc->arpcom.ac_enaddr));
#endif /* __NetBSD__ */
/*
* Start the IAS (Individual Address Setup) command/DMA.
*/
fxp_scb_wait(sc);
CSR_WRITE_1(sc, FXP_CSR_SCB_COMMAND, FXP_SCB_COMMAND_CU_START);
/* ...and wait for it to complete. */
while (!(cb_ias->cb_status & FXP_CB_STATUS_C));
/*
* Initialize transmit control block (TxCB) list.
*/
txp = sc->cbl_base;
bzero(txp, sizeof(struct fxp_cb_tx) * FXP_NTXCB);
for (i = 0; i < FXP_NTXCB; i++) {
txp[i].cb_status = FXP_CB_STATUS_C | FXP_CB_STATUS_OK;
txp[i].cb_command = FXP_CB_COMMAND_NOP;
txp[i].link_addr = vtophys(&txp[(i + 1) & FXP_TXCB_MASK].cb_status);
txp[i].tbd_array_addr = vtophys(&txp[i].tbd[0]);
txp[i].next = &txp[(i + 1) & FXP_TXCB_MASK];
}
/*
* Set the suspend flag on the first TxCB and start the control
* unit. It will execute the NOP and then suspend.
*/
txp->cb_command = FXP_CB_COMMAND_NOP | FXP_CB_COMMAND_S;
sc->cbl_first = sc->cbl_last = txp;
sc->tx_queued = 1;
fxp_scb_wait(sc);
CSR_WRITE_1(sc, FXP_CSR_SCB_COMMAND, FXP_SCB_COMMAND_CU_START);
/*
* Initialize receiver buffer area - RFA.
*/
fxp_scb_wait(sc);
CSR_WRITE_4(sc, FXP_CSR_SCB_GENERAL,
vtophys(sc->rfa_headm->m_ext.ext_buf) + RFA_ALIGNMENT_FUDGE);
CSR_WRITE_1(sc, FXP_CSR_SCB_COMMAND, FXP_SCB_COMMAND_RU_START);
/*
* Set current media.
*/
fxp_set_media(sc, sc->sc_media.ifm_cur->ifm_media);
ifp->if_flags |= IFF_RUNNING;
ifp->if_flags &= ~IFF_OACTIVE;
splx(s);
/*
* Start stats updater.
*/
sc->stat_ch = timeout(fxp_stats_update, sc, hz);
}
static void
fxp_set_media(sc, media)
struct fxp_softc *sc;
int media;
{
switch (sc->phy_primary_device) {
case FXP_PHY_DP83840:
case FXP_PHY_DP83840A:
fxp_mdi_write(sc, sc->phy_primary_addr, FXP_DP83840_PCR,
fxp_mdi_read(sc, sc->phy_primary_addr, FXP_DP83840_PCR) |
FXP_DP83840_PCR_LED4_MODE | /* LED4 always indicates duplex */
FXP_DP83840_PCR_F_CONNECT | /* force link disconnect bypass */
FXP_DP83840_PCR_BIT10); /* XXX I have no idea */
/* fall through */
case FXP_PHY_82553A:
case FXP_PHY_82553C: /* untested */
case FXP_PHY_82555:
case FXP_PHY_82555B:
if (IFM_SUBTYPE(media) != IFM_AUTO) {
int flags;
flags = (IFM_SUBTYPE(media) == IFM_100_TX) ?
FXP_PHY_BMCR_SPEED_100M : 0;
flags |= (media & IFM_FDX) ?
FXP_PHY_BMCR_FULLDUPLEX : 0;
fxp_mdi_write(sc, sc->phy_primary_addr,
FXP_PHY_BMCR,
(fxp_mdi_read(sc, sc->phy_primary_addr,
FXP_PHY_BMCR) &
~(FXP_PHY_BMCR_AUTOEN | FXP_PHY_BMCR_SPEED_100M |
FXP_PHY_BMCR_FULLDUPLEX)) | flags);
} else {
fxp_mdi_write(sc, sc->phy_primary_addr,
FXP_PHY_BMCR,
(fxp_mdi_read(sc, sc->phy_primary_addr,
FXP_PHY_BMCR) | FXP_PHY_BMCR_AUTOEN));
}
break;
/*
* The Seeq 80c24 doesn't have a PHY programming interface, so do
* nothing.
*/
case FXP_PHY_80C24:
break;
default:
printf(FXP_FORMAT
": warning: unsupported PHY, type = %d, addr = %d\n",
FXP_ARGS(sc), sc->phy_primary_device,
sc->phy_primary_addr);
}
}
/*
* Change media according to request.
*/
int
fxp_mediachange(ifp)
struct ifnet *ifp;
{
struct fxp_softc *sc = ifp->if_softc;
struct ifmedia *ifm = &sc->sc_media;
if (IFM_TYPE(ifm->ifm_media) != IFM_ETHER)
return (EINVAL);
fxp_set_media(sc, ifm->ifm_media);
return (0);
}
/*
* Notify the world which media we're using.
*/
void
fxp_mediastatus(ifp, ifmr)
struct ifnet *ifp;
struct ifmediareq *ifmr;
{
struct fxp_softc *sc = ifp->if_softc;
int flags, stsflags;
switch (sc->phy_primary_device) {
case FXP_PHY_82555:
case FXP_PHY_82555B:
case FXP_PHY_DP83840:
case FXP_PHY_DP83840A:
ifmr->ifm_status = IFM_AVALID; /* IFM_ACTIVE will be valid */
ifmr->ifm_active = IFM_ETHER;
/*
* the following is not an error.
* You need to read this register twice to get current
* status. This is correct documented behaviour, the
* first read gets latched values.
*/
stsflags = fxp_mdi_read(sc, sc->phy_primary_addr, FXP_PHY_STS);
stsflags = fxp_mdi_read(sc, sc->phy_primary_addr, FXP_PHY_STS);
if (stsflags & FXP_PHY_STS_LINK_STS)
ifmr->ifm_status |= IFM_ACTIVE;
/*
* If we are in auto mode, then try report the result.
*/
flags = fxp_mdi_read(sc, sc->phy_primary_addr, FXP_PHY_BMCR);
if (flags & FXP_PHY_BMCR_AUTOEN) {
ifmr->ifm_active |= IFM_AUTO; /* XXX presently 0 */
if (stsflags & FXP_PHY_STS_AUTO_DONE) {
/*
* Intel and National parts report
* differently on what they found.
*/
if ((sc->phy_primary_device == FXP_PHY_82555)
|| (sc->phy_primary_device == FXP_PHY_82555B)) {
flags = fxp_mdi_read(sc,
sc->phy_primary_addr,
FXP_PHY_USC);
if (flags & FXP_PHY_USC_SPEED)
ifmr->ifm_active |= IFM_100_TX;
else
ifmr->ifm_active |= IFM_10_T;
if (flags & FXP_PHY_USC_DUPLEX)
ifmr->ifm_active |= IFM_FDX;
} else { /* it's National. only know speed */
flags = fxp_mdi_read(sc,
sc->phy_primary_addr,
FXP_DP83840_PAR);
if (flags & FXP_DP83840_PAR_SPEED_10)
ifmr->ifm_active |= IFM_10_T;
else
ifmr->ifm_active |= IFM_100_TX;
}
}
} else { /* in manual mode.. just report what we were set to */
if (flags & FXP_PHY_BMCR_SPEED_100M)
ifmr->ifm_active |= IFM_100_TX;
else
ifmr->ifm_active |= IFM_10_T;
if (flags & FXP_PHY_BMCR_FULLDUPLEX)
ifmr->ifm_active |= IFM_FDX;
}
break;
case FXP_PHY_80C24:
default:
ifmr->ifm_active = IFM_ETHER|IFM_MANUAL; /* XXX IFM_AUTO ? */
}
}
/*
* Add a buffer to the end of the RFA buffer list.
* Return 0 if successful, 1 for failure. A failure results in
* adding the 'oldm' (if non-NULL) on to the end of the list -
* tossing out its old contents and recycling it.
* The RFA struct is stuck at the beginning of mbuf cluster and the
* data pointer is fixed up to point just past it.
*/
static int
fxp_add_rfabuf(sc, oldm)
struct fxp_softc *sc;
struct mbuf *oldm;
{
u_int32_t v;
struct mbuf *m;
struct fxp_rfa *rfa, *p_rfa;
MGETHDR(m, M_DONTWAIT, MT_DATA);
if (m != NULL) {
MCLGET(m, M_DONTWAIT);
if ((m->m_flags & M_EXT) == 0) {
m_freem(m);
if (oldm == NULL)
return 1;
m = oldm;
m->m_data = m->m_ext.ext_buf;
}
} else {
if (oldm == NULL)
return 1;
m = oldm;
m->m_data = m->m_ext.ext_buf;
}
/*
* Move the data pointer up so that the incoming data packet
* will be 32-bit aligned.
*/
m->m_data += RFA_ALIGNMENT_FUDGE;
/*
* Get a pointer to the base of the mbuf cluster and move
* data start past it.
*/
rfa = mtod(m, struct fxp_rfa *);
m->m_data += sizeof(struct fxp_rfa);
rfa->size = (u_int16_t)(MCLBYTES - sizeof(struct fxp_rfa) - RFA_ALIGNMENT_FUDGE);
/*
* Initialize the rest of the RFA. Note that since the RFA
* is misaligned, we cannot store values directly. Instead,
* we use an optimized, inline copy.
*/
rfa->rfa_status = 0;
rfa->rfa_control = FXP_RFA_CONTROL_EL;
rfa->actual_size = 0;
v = -1;
fxp_lwcopy(&v, (volatile u_int32_t *) rfa->link_addr);
fxp_lwcopy(&v, (volatile u_int32_t *) rfa->rbd_addr);
/*
* If there are other buffers already on the list, attach this
* one to the end by fixing up the tail to point to this one.
*/
if (sc->rfa_headm != NULL) {
p_rfa = (struct fxp_rfa *) (sc->rfa_tailm->m_ext.ext_buf +
RFA_ALIGNMENT_FUDGE);
sc->rfa_tailm->m_next = m;
v = vtophys(rfa);
fxp_lwcopy(&v, (volatile u_int32_t *) p_rfa->link_addr);
p_rfa->rfa_control = 0;
} else {
sc->rfa_headm = m;
}
sc->rfa_tailm = m;
return (m == oldm);
}
static volatile int
fxp_mdi_read(sc, phy, reg)
struct fxp_softc *sc;
int phy;
int reg;
{
int count = 10000;
int value;
CSR_WRITE_4(sc, FXP_CSR_MDICONTROL,
(FXP_MDI_READ << 26) | (reg << 16) | (phy << 21));
while (((value = CSR_READ_4(sc, FXP_CSR_MDICONTROL)) & 0x10000000) == 0
&& count--)
DELAY(10);
if (count <= 0)
printf(FXP_FORMAT ": fxp_mdi_read: timed out\n",
FXP_ARGS(sc));
return (value & 0xffff);
}
static void
fxp_mdi_write(sc, phy, reg, value)
struct fxp_softc *sc;
int phy;
int reg;
int value;
{
int count = 10000;
CSR_WRITE_4(sc, FXP_CSR_MDICONTROL,
(FXP_MDI_WRITE << 26) | (reg << 16) | (phy << 21) |
(value & 0xffff));
while((CSR_READ_4(sc, FXP_CSR_MDICONTROL) & 0x10000000) == 0 &&
count--)
DELAY(10);
if (count <= 0)
printf(FXP_FORMAT ": fxp_mdi_write: timed out\n",
FXP_ARGS(sc));
}
static int
fxp_ioctl(ifp, command, data)
struct ifnet *ifp;
FXP_IOCTLCMD_TYPE command;
caddr_t data;
{
struct fxp_softc *sc = ifp->if_softc;
struct ifreq *ifr = (struct ifreq *)data;
int s, error = 0;
s = splimp();
switch (command) {
case SIOCSIFADDR:
#if !defined(__NetBSD__)
case SIOCGIFADDR:
case SIOCSIFMTU:
#endif
error = ether_ioctl(ifp, command, data);
break;
case SIOCSIFFLAGS:
sc->all_mcasts = (ifp->if_flags & IFF_ALLMULTI) ? 1 : 0;
/*
* If interface is marked up and not running, then start it.
* If it is marked down and running, stop it.
* XXX If it's up then re-initialize it. This is so flags
* such as IFF_PROMISC are handled.
*/
if (ifp->if_flags & IFF_UP) {
fxp_init(sc);
} else {
if (ifp->if_flags & IFF_RUNNING)
fxp_stop(sc);
}
break;
case SIOCADDMULTI:
case SIOCDELMULTI:
sc->all_mcasts = (ifp->if_flags & IFF_ALLMULTI) ? 1 : 0;
#if defined(__NetBSD__)
error = (command == SIOCADDMULTI) ?
ether_addmulti(ifr, &sc->sc_ethercom) :
ether_delmulti(ifr, &sc->sc_ethercom);
if (error == ENETRESET) {
/*
* Multicast list has changed; set the hardware
* filter accordingly.
*/
if (!sc->all_mcasts)
fxp_mc_setup(sc);
/*
* fxp_mc_setup() can turn on all_mcasts if we run
* out of space, so check it again rather than else {}.
*/
if (sc->all_mcasts)
fxp_init(sc);
error = 0;
}
#else /* __FreeBSD__ */
/*
* Multicast list has changed; set the hardware filter
* accordingly.
*/
if (!sc->all_mcasts)
fxp_mc_setup(sc);
/*
* fxp_mc_setup() can turn on sc->all_mcasts, so check it
* again rather than else {}.
*/
if (sc->all_mcasts)
fxp_init(sc);
error = 0;
#endif /* __NetBSD__ */
break;
case SIOCSIFMEDIA:
case SIOCGIFMEDIA:
error = ifmedia_ioctl(ifp, ifr, &sc->sc_media, command);
break;
default:
error = EINVAL;
}
(void) splx(s);
return (error);
}
/*
* Program the multicast filter.
*
* We have an artificial restriction that the multicast setup command
* must be the first command in the chain, so we take steps to ensure
* this. By requiring this, it allows us to keep up the performance of
* the pre-initialized command ring (esp. link pointers) by not actually
* inserting the mcsetup command in the ring - i.e. its link pointer
* points to the TxCB ring, but the mcsetup descriptor itself is not part
* of it. We then can do 'CU_START' on the mcsetup descriptor and have it
* lead into the regular TxCB ring when it completes.
*
* This function must be called at splimp.
*/
static void
fxp_mc_setup(sc)
struct fxp_softc *sc;
{
struct fxp_cb_mcs *mcsp = sc->mcsp;
struct ifnet *ifp = &sc->sc_if;
struct ifmultiaddr *ifma;
int nmcasts;
/*
* If there are queued commands, we must wait until they are all
* completed. If we are already waiting, then add a NOP command
* with interrupt option so that we're notified when all commands
* have been completed - fxp_start() ensures that no additional
* TX commands will be added when need_mcsetup is true.
*/
if (sc->tx_queued) {
struct fxp_cb_tx *txp;
/*
* need_mcsetup will be true if we are already waiting for the
* NOP command to be completed (see below). In this case, bail.
*/
if (sc->need_mcsetup)
return;
sc->need_mcsetup = 1;
/*
* Add a NOP command with interrupt so that we are notified when all
* TX commands have been processed.
*/
txp = sc->cbl_last->next;
txp->mb_head = NULL;
txp->cb_status = 0;
txp->cb_command = FXP_CB_COMMAND_NOP | FXP_CB_COMMAND_S | FXP_CB_COMMAND_I;
/*
* Advance the end of list forward.
*/
sc->cbl_last->cb_command &= ~FXP_CB_COMMAND_S;
sc->cbl_last = txp;
sc->tx_queued++;
/*
* Issue a resume in case the CU has just suspended.
*/
fxp_scb_wait(sc);
CSR_WRITE_1(sc, FXP_CSR_SCB_COMMAND, FXP_SCB_COMMAND_CU_RESUME);
/*
* Set a 5 second timer just in case we don't hear from the
* card again.
*/
ifp->if_timer = 5;
return;
}
sc->need_mcsetup = 0;
/*
* Initialize multicast setup descriptor.
*/
mcsp->next = sc->cbl_base;
mcsp->mb_head = NULL;
mcsp->cb_status = 0;
mcsp->cb_command = FXP_CB_COMMAND_MCAS | FXP_CB_COMMAND_S | FXP_CB_COMMAND_I;
mcsp->link_addr = vtophys(&sc->cbl_base->cb_status);
nmcasts = 0;
if (!sc->all_mcasts) {
for (ifma = ifp->if_multiaddrs.lh_first; ifma != NULL;
ifma = ifma->ifma_link.le_next) {
if (ifma->ifma_addr->sa_family != AF_LINK)
continue;
if (nmcasts >= MAXMCADDR) {
sc->all_mcasts = 1;
nmcasts = 0;
break;
}
bcopy(LLADDR((struct sockaddr_dl *)ifma->ifma_addr),
(void *)(uintptr_t)(volatile void *)
&sc->mcsp->mc_addr[nmcasts][0], 6);
nmcasts++;
}
}
mcsp->mc_cnt = nmcasts * 6;
sc->cbl_first = sc->cbl_last = (struct fxp_cb_tx *) mcsp;
sc->tx_queued = 1;
/*
* Wait until command unit is not active. This should never
* be the case when nothing is queued, but make sure anyway.
*/
while ((CSR_READ_1(sc, FXP_CSR_SCB_RUSCUS) >> 6) ==
FXP_SCB_CUS_ACTIVE) ;
/*
* Start the multicast setup command.
*/
fxp_scb_wait(sc);
CSR_WRITE_4(sc, FXP_CSR_SCB_GENERAL, vtophys(&mcsp->cb_status));
CSR_WRITE_1(sc, FXP_CSR_SCB_COMMAND, FXP_SCB_COMMAND_CU_START);
ifp->if_timer = 2;
return;
}
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