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freebsd-skq/sys/dev/bfe/if_bfe.c
Pawel Biernacki 7029da5c36 Mark more nodes as CTLFLAG_MPSAFE or CTLFLAG_NEEDGIANT (17 of many) 
r357614 added CTLFLAG_NEEDGIANT to make it easier to find nodes that are
still not MPSAFE (or already are but aren’t properly marked).
Use it in preparation for a general review of all nodes.

This is non-functional change that adds annotations to SYSCTL_NODE and
SYSCTL_PROC nodes using one of the soon-to-be-required flags.

Mark all obvious cases as MPSAFE.  All entries that haven't been marked
as MPSAFE before are by default marked as NEEDGIANT

Approved by:	kib (mentor, blanket)
Commented by:	kib, gallatin, melifaro
Differential Revision:	https://reviews.freebsd.org/D23718
2020-02-26 14:26:36 +00:00

1972 lines
50 KiB
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/*-
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
*
* Copyright (c) 2003 Stuart Walsh<stu@ipng.org.uk>
* and Duncan Barclay<dmlb@dmlb.org>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS 'AS IS' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/bus.h>
#include <sys/endian.h>
#include <sys/kernel.h>
#include <sys/malloc.h>
#include <sys/mbuf.h>
#include <sys/module.h>
#include <sys/rman.h>
#include <sys/socket.h>
#include <sys/sockio.h>
#include <sys/sysctl.h>
#include <net/bpf.h>
#include <net/if.h>
#include <net/if_var.h>
#include <net/ethernet.h>
#include <net/if_dl.h>
#include <net/if_media.h>
#include <net/if_types.h>
#include <net/if_vlan_var.h>
#include <dev/mii/mii.h>
#include <dev/mii/miivar.h>
#include <dev/pci/pcireg.h>
#include <dev/pci/pcivar.h>
#include <machine/bus.h>
#include <dev/bfe/if_bfereg.h>
MODULE_DEPEND(bfe, pci, 1, 1, 1);
MODULE_DEPEND(bfe, ether, 1, 1, 1);
MODULE_DEPEND(bfe, miibus, 1, 1, 1);
/* "device miibus" required. See GENERIC if you get errors here. */
#include "miibus_if.h"
#define BFE_DEVDESC_MAX 64 /* Maximum device description length */
static struct bfe_type bfe_devs[] = {
{ BCOM_VENDORID, BCOM_DEVICEID_BCM4401,
"Broadcom BCM4401 Fast Ethernet" },
{ BCOM_VENDORID, BCOM_DEVICEID_BCM4401B0,
"Broadcom BCM4401-B0 Fast Ethernet" },
{ 0, 0, NULL }
};
static int bfe_probe (device_t);
static int bfe_attach (device_t);
static int bfe_detach (device_t);
static int bfe_suspend (device_t);
static int bfe_resume (device_t);
static void bfe_release_resources (struct bfe_softc *);
static void bfe_intr (void *);
static int bfe_encap (struct bfe_softc *, struct mbuf **);
static void bfe_start (struct ifnet *);
static void bfe_start_locked (struct ifnet *);
static int bfe_ioctl (struct ifnet *, u_long, caddr_t);
static void bfe_init (void *);
static void bfe_init_locked (void *);
static void bfe_stop (struct bfe_softc *);
static void bfe_watchdog (struct bfe_softc *);
static int bfe_shutdown (device_t);
static void bfe_tick (void *);
static void bfe_txeof (struct bfe_softc *);
static void bfe_rxeof (struct bfe_softc *);
static void bfe_set_rx_mode (struct bfe_softc *);
static int bfe_list_rx_init (struct bfe_softc *);
static void bfe_list_tx_init (struct bfe_softc *);
static void bfe_discard_buf (struct bfe_softc *, int);
static int bfe_list_newbuf (struct bfe_softc *, int);
static void bfe_rx_ring_free (struct bfe_softc *);
static void bfe_pci_setup (struct bfe_softc *, u_int32_t);
static int bfe_ifmedia_upd (struct ifnet *);
static void bfe_ifmedia_sts (struct ifnet *, struct ifmediareq *);
static int bfe_miibus_readreg (device_t, int, int);
static int bfe_miibus_writereg (device_t, int, int, int);
static void bfe_miibus_statchg (device_t);
static int bfe_wait_bit (struct bfe_softc *, u_int32_t, u_int32_t,
u_long, const int);
static void bfe_get_config (struct bfe_softc *sc);
static void bfe_read_eeprom (struct bfe_softc *, u_int8_t *);
static void bfe_stats_update (struct bfe_softc *);
static void bfe_clear_stats (struct bfe_softc *);
static int bfe_readphy (struct bfe_softc *, u_int32_t, u_int32_t*);
static int bfe_writephy (struct bfe_softc *, u_int32_t, u_int32_t);
static int bfe_resetphy (struct bfe_softc *);
static int bfe_setupphy (struct bfe_softc *);
static void bfe_chip_reset (struct bfe_softc *);
static void bfe_chip_halt (struct bfe_softc *);
static void bfe_core_reset (struct bfe_softc *);
static void bfe_core_disable (struct bfe_softc *);
static int bfe_dma_alloc (struct bfe_softc *);
static void bfe_dma_free (struct bfe_softc *sc);
static void bfe_dma_map (void *, bus_dma_segment_t *, int, int);
static void bfe_cam_write (struct bfe_softc *, u_char *, int);
static int sysctl_bfe_stats (SYSCTL_HANDLER_ARGS);
static device_method_t bfe_methods[] = {
/* Device interface */
DEVMETHOD(device_probe, bfe_probe),
DEVMETHOD(device_attach, bfe_attach),
DEVMETHOD(device_detach, bfe_detach),
DEVMETHOD(device_shutdown, bfe_shutdown),
DEVMETHOD(device_suspend, bfe_suspend),
DEVMETHOD(device_resume, bfe_resume),
/* MII interface */
DEVMETHOD(miibus_readreg, bfe_miibus_readreg),
DEVMETHOD(miibus_writereg, bfe_miibus_writereg),
DEVMETHOD(miibus_statchg, bfe_miibus_statchg),
DEVMETHOD_END
};
static driver_t bfe_driver = {
"bfe",
bfe_methods,
sizeof(struct bfe_softc)
};
static devclass_t bfe_devclass;
DRIVER_MODULE(bfe, pci, bfe_driver, bfe_devclass, 0, 0);
MODULE_PNP_INFO("U16:vendor;U16:device;D:#", pci, bfe, bfe_devs,
nitems(bfe_devs) - 1);
DRIVER_MODULE(miibus, bfe, miibus_driver, miibus_devclass, 0, 0);
/*
* Probe for a Broadcom 4401 chip.
*/
static int
bfe_probe(device_t dev)
{
struct bfe_type *t;
t = bfe_devs;
while (t->bfe_name != NULL) {
if (pci_get_vendor(dev) == t->bfe_vid &&
pci_get_device(dev) == t->bfe_did) {
device_set_desc(dev, t->bfe_name);
return (BUS_PROBE_DEFAULT);
}
t++;
}
return (ENXIO);
}
struct bfe_dmamap_arg {
bus_addr_t bfe_busaddr;
};
static int
bfe_dma_alloc(struct bfe_softc *sc)
{
struct bfe_dmamap_arg ctx;
struct bfe_rx_data *rd;
struct bfe_tx_data *td;
int error, i;
/*
* parent tag. Apparently the chip cannot handle any DMA address
* greater than 1GB.
*/
error = bus_dma_tag_create(bus_get_dma_tag(sc->bfe_dev), /* parent */
1, 0, /* alignment, boundary */
BFE_DMA_MAXADDR, /* lowaddr */
BUS_SPACE_MAXADDR, /* highaddr */
NULL, NULL, /* filter, filterarg */
BUS_SPACE_MAXSIZE_32BIT, /* maxsize */
0, /* nsegments */
BUS_SPACE_MAXSIZE_32BIT, /* maxsegsize */
0, /* flags */
NULL, NULL, /* lockfunc, lockarg */
&sc->bfe_parent_tag);
if (error != 0) {
device_printf(sc->bfe_dev, "cannot create parent DMA tag.\n");
goto fail;
}
/* Create tag for Tx ring. */
error = bus_dma_tag_create(sc->bfe_parent_tag, /* parent */
BFE_TX_RING_ALIGN, 0, /* alignment, boundary */
BUS_SPACE_MAXADDR, /* lowaddr */
BUS_SPACE_MAXADDR, /* highaddr */
NULL, NULL, /* filter, filterarg */
BFE_TX_LIST_SIZE, /* maxsize */
1, /* nsegments */
BFE_TX_LIST_SIZE, /* maxsegsize */
0, /* flags */
NULL, NULL, /* lockfunc, lockarg */
&sc->bfe_tx_tag);
if (error != 0) {
device_printf(sc->bfe_dev, "cannot create Tx ring DMA tag.\n");
goto fail;
}
/* Create tag for Rx ring. */
error = bus_dma_tag_create(sc->bfe_parent_tag, /* parent */
BFE_RX_RING_ALIGN, 0, /* alignment, boundary */
BUS_SPACE_MAXADDR, /* lowaddr */
BUS_SPACE_MAXADDR, /* highaddr */
NULL, NULL, /* filter, filterarg */
BFE_RX_LIST_SIZE, /* maxsize */
1, /* nsegments */
BFE_RX_LIST_SIZE, /* maxsegsize */
0, /* flags */
NULL, NULL, /* lockfunc, lockarg */
&sc->bfe_rx_tag);
if (error != 0) {
device_printf(sc->bfe_dev, "cannot create Rx ring DMA tag.\n");
goto fail;
}
/* Create tag for Tx buffers. */
error = bus_dma_tag_create(sc->bfe_parent_tag, /* parent */
1, 0, /* alignment, boundary */
BUS_SPACE_MAXADDR, /* lowaddr */
BUS_SPACE_MAXADDR, /* highaddr */
NULL, NULL, /* filter, filterarg */
MCLBYTES * BFE_MAXTXSEGS, /* maxsize */
BFE_MAXTXSEGS, /* nsegments */
MCLBYTES, /* maxsegsize */
0, /* flags */
NULL, NULL, /* lockfunc, lockarg */
&sc->bfe_txmbuf_tag);
if (error != 0) {
device_printf(sc->bfe_dev,
"cannot create Tx buffer DMA tag.\n");
goto fail;
}
/* Create tag for Rx buffers. */
error = bus_dma_tag_create(sc->bfe_parent_tag, /* parent */
1, 0, /* alignment, boundary */
BUS_SPACE_MAXADDR, /* lowaddr */
BUS_SPACE_MAXADDR, /* highaddr */
NULL, NULL, /* filter, filterarg */
MCLBYTES, /* maxsize */
1, /* nsegments */
MCLBYTES, /* maxsegsize */
0, /* flags */
NULL, NULL, /* lockfunc, lockarg */
&sc->bfe_rxmbuf_tag);
if (error != 0) {
device_printf(sc->bfe_dev,
"cannot create Rx buffer DMA tag.\n");
goto fail;
}
/* Allocate DMA'able memory and load DMA map. */
error = bus_dmamem_alloc(sc->bfe_tx_tag, (void *)&sc->bfe_tx_list,
BUS_DMA_WAITOK | BUS_DMA_ZERO | BUS_DMA_COHERENT, &sc->bfe_tx_map);
if (error != 0) {
device_printf(sc->bfe_dev,
"cannot allocate DMA'able memory for Tx ring.\n");
goto fail;
}
ctx.bfe_busaddr = 0;
error = bus_dmamap_load(sc->bfe_tx_tag, sc->bfe_tx_map,
sc->bfe_tx_list, BFE_TX_LIST_SIZE, bfe_dma_map, &ctx,
BUS_DMA_NOWAIT);
if (error != 0 || ctx.bfe_busaddr == 0) {
device_printf(sc->bfe_dev,
"cannot load DMA'able memory for Tx ring.\n");
goto fail;
}
sc->bfe_tx_dma = BFE_ADDR_LO(ctx.bfe_busaddr);
error = bus_dmamem_alloc(sc->bfe_rx_tag, (void *)&sc->bfe_rx_list,
BUS_DMA_WAITOK | BUS_DMA_ZERO | BUS_DMA_COHERENT, &sc->bfe_rx_map);
if (error != 0) {
device_printf(sc->bfe_dev,
"cannot allocate DMA'able memory for Rx ring.\n");
goto fail;
}
ctx.bfe_busaddr = 0;
error = bus_dmamap_load(sc->bfe_rx_tag, sc->bfe_rx_map,
sc->bfe_rx_list, BFE_RX_LIST_SIZE, bfe_dma_map, &ctx,
BUS_DMA_NOWAIT);
if (error != 0 || ctx.bfe_busaddr == 0) {
device_printf(sc->bfe_dev,
"cannot load DMA'able memory for Rx ring.\n");
goto fail;
}
sc->bfe_rx_dma = BFE_ADDR_LO(ctx.bfe_busaddr);
/* Create DMA maps for Tx buffers. */
for (i = 0; i < BFE_TX_LIST_CNT; i++) {
td = &sc->bfe_tx_ring[i];
td->bfe_mbuf = NULL;
td->bfe_map = NULL;
error = bus_dmamap_create(sc->bfe_txmbuf_tag, 0, &td->bfe_map);
if (error != 0) {
device_printf(sc->bfe_dev,
"cannot create DMA map for Tx.\n");
goto fail;
}
}
/* Create spare DMA map for Rx buffers. */
error = bus_dmamap_create(sc->bfe_rxmbuf_tag, 0, &sc->bfe_rx_sparemap);
if (error != 0) {
device_printf(sc->bfe_dev, "cannot create spare DMA map for Rx.\n");
goto fail;
}
/* Create DMA maps for Rx buffers. */
for (i = 0; i < BFE_RX_LIST_CNT; i++) {
rd = &sc->bfe_rx_ring[i];
rd->bfe_mbuf = NULL;
rd->bfe_map = NULL;
rd->bfe_ctrl = 0;
error = bus_dmamap_create(sc->bfe_rxmbuf_tag, 0, &rd->bfe_map);
if (error != 0) {
device_printf(sc->bfe_dev,
"cannot create DMA map for Rx.\n");
goto fail;
}
}
fail:
return (error);
}
static void
bfe_dma_free(struct bfe_softc *sc)
{
struct bfe_tx_data *td;
struct bfe_rx_data *rd;
int i;
/* Tx ring. */
if (sc->bfe_tx_tag != NULL) {
if (sc->bfe_tx_dma != 0)
bus_dmamap_unload(sc->bfe_tx_tag, sc->bfe_tx_map);
if (sc->bfe_tx_list != NULL)
bus_dmamem_free(sc->bfe_tx_tag, sc->bfe_tx_list,
sc->bfe_tx_map);
sc->bfe_tx_dma = 0;
sc->bfe_tx_list = NULL;
bus_dma_tag_destroy(sc->bfe_tx_tag);
sc->bfe_tx_tag = NULL;
}
/* Rx ring. */
if (sc->bfe_rx_tag != NULL) {
if (sc->bfe_rx_dma != 0)
bus_dmamap_unload(sc->bfe_rx_tag, sc->bfe_rx_map);
if (sc->bfe_rx_list != NULL)
bus_dmamem_free(sc->bfe_rx_tag, sc->bfe_rx_list,
sc->bfe_rx_map);
sc->bfe_rx_dma = 0;
sc->bfe_rx_list = NULL;
bus_dma_tag_destroy(sc->bfe_rx_tag);
sc->bfe_rx_tag = NULL;
}
/* Tx buffers. */
if (sc->bfe_txmbuf_tag != NULL) {
for (i = 0; i < BFE_TX_LIST_CNT; i++) {
td = &sc->bfe_tx_ring[i];
if (td->bfe_map != NULL) {
bus_dmamap_destroy(sc->bfe_txmbuf_tag,
td->bfe_map);
td->bfe_map = NULL;
}
}
bus_dma_tag_destroy(sc->bfe_txmbuf_tag);
sc->bfe_txmbuf_tag = NULL;
}
/* Rx buffers. */
if (sc->bfe_rxmbuf_tag != NULL) {
for (i = 0; i < BFE_RX_LIST_CNT; i++) {
rd = &sc->bfe_rx_ring[i];
if (rd->bfe_map != NULL) {
bus_dmamap_destroy(sc->bfe_rxmbuf_tag,
rd->bfe_map);
rd->bfe_map = NULL;
}
}
if (sc->bfe_rx_sparemap != NULL) {
bus_dmamap_destroy(sc->bfe_rxmbuf_tag,
sc->bfe_rx_sparemap);
sc->bfe_rx_sparemap = NULL;
}
bus_dma_tag_destroy(sc->bfe_rxmbuf_tag);
sc->bfe_rxmbuf_tag = NULL;
}
if (sc->bfe_parent_tag != NULL) {
bus_dma_tag_destroy(sc->bfe_parent_tag);
sc->bfe_parent_tag = NULL;
}
}
static int
bfe_attach(device_t dev)
{
struct ifnet *ifp = NULL;
struct bfe_softc *sc;
int error = 0, rid;
sc = device_get_softc(dev);
mtx_init(&sc->bfe_mtx, device_get_nameunit(dev), MTX_NETWORK_LOCK,
MTX_DEF);
callout_init_mtx(&sc->bfe_stat_co, &sc->bfe_mtx, 0);
sc->bfe_dev = dev;
/*
* Map control/status registers.
*/
pci_enable_busmaster(dev);
rid = PCIR_BAR(0);
sc->bfe_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid,
RF_ACTIVE);
if (sc->bfe_res == NULL) {
device_printf(dev, "couldn't map memory\n");
error = ENXIO;
goto fail;
}
/* Allocate interrupt */
rid = 0;
sc->bfe_irq = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid,
RF_SHAREABLE | RF_ACTIVE);
if (sc->bfe_irq == NULL) {
device_printf(dev, "couldn't map interrupt\n");
error = ENXIO;
goto fail;
}
if (bfe_dma_alloc(sc) != 0) {
device_printf(dev, "failed to allocate DMA resources\n");
error = ENXIO;
goto fail;
}
SYSCTL_ADD_PROC(device_get_sysctl_ctx(dev),
SYSCTL_CHILDREN(device_get_sysctl_tree(dev)), OID_AUTO,
"stats", CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_NEEDGIANT, sc, 0,
sysctl_bfe_stats, "I", "Statistics");
/* Set up ifnet structure */
ifp = sc->bfe_ifp = if_alloc(IFT_ETHER);
if (ifp == NULL) {
device_printf(dev, "failed to if_alloc()\n");
error = ENOSPC;
goto fail;
}
ifp->if_softc = sc;
if_initname(ifp, device_get_name(dev), device_get_unit(dev));
ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST;
ifp->if_ioctl = bfe_ioctl;
ifp->if_start = bfe_start;
ifp->if_init = bfe_init;
IFQ_SET_MAXLEN(&ifp->if_snd, BFE_TX_QLEN);
ifp->if_snd.ifq_drv_maxlen = BFE_TX_QLEN;
IFQ_SET_READY(&ifp->if_snd);
bfe_get_config(sc);
/* Reset the chip and turn on the PHY */
BFE_LOCK(sc);
bfe_chip_reset(sc);
BFE_UNLOCK(sc);
error = mii_attach(dev, &sc->bfe_miibus, ifp, bfe_ifmedia_upd,
bfe_ifmedia_sts, BMSR_DEFCAPMASK, sc->bfe_phyaddr, MII_OFFSET_ANY,
0);
if (error != 0) {
device_printf(dev, "attaching PHYs failed\n");
goto fail;
}
ether_ifattach(ifp, sc->bfe_enaddr);
/*
* Tell the upper layer(s) we support long frames.
*/
ifp->if_hdrlen = sizeof(struct ether_vlan_header);
ifp->if_capabilities |= IFCAP_VLAN_MTU;
ifp->if_capenable |= IFCAP_VLAN_MTU;
/*
* Hook interrupt last to avoid having to lock softc
*/
error = bus_setup_intr(dev, sc->bfe_irq, INTR_TYPE_NET | INTR_MPSAFE,
NULL, bfe_intr, sc, &sc->bfe_intrhand);
if (error) {
device_printf(dev, "couldn't set up irq\n");
goto fail;
}
fail:
if (error != 0)
bfe_detach(dev);
return (error);
}
static int
bfe_detach(device_t dev)
{
struct bfe_softc *sc;
struct ifnet *ifp;
sc = device_get_softc(dev);
ifp = sc->bfe_ifp;
if (device_is_attached(dev)) {
BFE_LOCK(sc);
sc->bfe_flags |= BFE_FLAG_DETACH;
bfe_stop(sc);
BFE_UNLOCK(sc);
callout_drain(&sc->bfe_stat_co);
if (ifp != NULL)
ether_ifdetach(ifp);
}
BFE_LOCK(sc);
bfe_chip_reset(sc);
BFE_UNLOCK(sc);
bus_generic_detach(dev);
if (sc->bfe_miibus != NULL)
device_delete_child(dev, sc->bfe_miibus);
bfe_release_resources(sc);
bfe_dma_free(sc);
mtx_destroy(&sc->bfe_mtx);
return (0);
}
/*
* Stop all chip I/O so that the kernel's probe routines don't
* get confused by errant DMAs when rebooting.
*/
static int
bfe_shutdown(device_t dev)
{
struct bfe_softc *sc;
sc = device_get_softc(dev);
BFE_LOCK(sc);
bfe_stop(sc);
BFE_UNLOCK(sc);
return (0);
}
static int
bfe_suspend(device_t dev)
{
struct bfe_softc *sc;
sc = device_get_softc(dev);
BFE_LOCK(sc);
bfe_stop(sc);
BFE_UNLOCK(sc);
return (0);
}
static int
bfe_resume(device_t dev)
{
struct bfe_softc *sc;
struct ifnet *ifp;
sc = device_get_softc(dev);
ifp = sc->bfe_ifp;
BFE_LOCK(sc);
bfe_chip_reset(sc);
if (ifp->if_flags & IFF_UP) {
bfe_init_locked(sc);
if (ifp->if_drv_flags & IFF_DRV_RUNNING &&
!IFQ_DRV_IS_EMPTY(&ifp->if_snd))
bfe_start_locked(ifp);
}
BFE_UNLOCK(sc);
return (0);
}
static int
bfe_miibus_readreg(device_t dev, int phy, int reg)
{
struct bfe_softc *sc;
u_int32_t ret;
sc = device_get_softc(dev);
bfe_readphy(sc, reg, &ret);
return (ret);
}
static int
bfe_miibus_writereg(device_t dev, int phy, int reg, int val)
{
struct bfe_softc *sc;
sc = device_get_softc(dev);
bfe_writephy(sc, reg, val);
return (0);
}
static void
bfe_miibus_statchg(device_t dev)
{
struct bfe_softc *sc;
struct mii_data *mii;
u_int32_t val, flow;
sc = device_get_softc(dev);
mii = device_get_softc(sc->bfe_miibus);
sc->bfe_flags &= ~BFE_FLAG_LINK;
if ((mii->mii_media_status & (IFM_ACTIVE | IFM_AVALID)) ==
(IFM_ACTIVE | IFM_AVALID)) {
switch (IFM_SUBTYPE(mii->mii_media_active)) {
case IFM_10_T:
case IFM_100_TX:
sc->bfe_flags |= BFE_FLAG_LINK;
break;
default:
break;
}
}
/* XXX Should stop Rx/Tx engine prior to touching MAC. */
val = CSR_READ_4(sc, BFE_TX_CTRL);
val &= ~BFE_TX_DUPLEX;
if ((IFM_OPTIONS(mii->mii_media_active) & IFM_FDX) != 0) {
val |= BFE_TX_DUPLEX;
flow = 0;
#ifdef notyet
flow = CSR_READ_4(sc, BFE_RXCONF);
flow &= ~BFE_RXCONF_FLOW;
if ((IFM_OPTIONS(sc->sc_mii->mii_media_active) &
IFM_ETH_RXPAUSE) != 0)
flow |= BFE_RXCONF_FLOW;
CSR_WRITE_4(sc, BFE_RXCONF, flow);
/*
* It seems that the hardware has Tx pause issues
* so enable only Rx pause.
*/
flow = CSR_READ_4(sc, BFE_MAC_FLOW);
flow &= ~BFE_FLOW_PAUSE_ENAB;
CSR_WRITE_4(sc, BFE_MAC_FLOW, flow);
#endif
}
CSR_WRITE_4(sc, BFE_TX_CTRL, val);
}
static void
bfe_tx_ring_free(struct bfe_softc *sc)
{
int i;
for(i = 0; i < BFE_TX_LIST_CNT; i++) {
if (sc->bfe_tx_ring[i].bfe_mbuf != NULL) {
bus_dmamap_sync(sc->bfe_txmbuf_tag,
sc->bfe_tx_ring[i].bfe_map, BUS_DMASYNC_POSTWRITE);
bus_dmamap_unload(sc->bfe_txmbuf_tag,
sc->bfe_tx_ring[i].bfe_map);
m_freem(sc->bfe_tx_ring[i].bfe_mbuf);
sc->bfe_tx_ring[i].bfe_mbuf = NULL;
}
}
bzero(sc->bfe_tx_list, BFE_TX_LIST_SIZE);
bus_dmamap_sync(sc->bfe_tx_tag, sc->bfe_tx_map,
BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE);
}
static void
bfe_rx_ring_free(struct bfe_softc *sc)
{
int i;
for (i = 0; i < BFE_RX_LIST_CNT; i++) {
if (sc->bfe_rx_ring[i].bfe_mbuf != NULL) {
bus_dmamap_sync(sc->bfe_rxmbuf_tag,
sc->bfe_rx_ring[i].bfe_map, BUS_DMASYNC_POSTREAD);
bus_dmamap_unload(sc->bfe_rxmbuf_tag,
sc->bfe_rx_ring[i].bfe_map);
m_freem(sc->bfe_rx_ring[i].bfe_mbuf);
sc->bfe_rx_ring[i].bfe_mbuf = NULL;
}
}
bzero(sc->bfe_rx_list, BFE_RX_LIST_SIZE);
bus_dmamap_sync(sc->bfe_rx_tag, sc->bfe_rx_map,
BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE);
}
static int
bfe_list_rx_init(struct bfe_softc *sc)
{
struct bfe_rx_data *rd;
int i;
sc->bfe_rx_prod = sc->bfe_rx_cons = 0;
bzero(sc->bfe_rx_list, BFE_RX_LIST_SIZE);
for (i = 0; i < BFE_RX_LIST_CNT; i++) {
rd = &sc->bfe_rx_ring[i];
rd->bfe_mbuf = NULL;
rd->bfe_ctrl = 0;
if (bfe_list_newbuf(sc, i) != 0)
return (ENOBUFS);
}
bus_dmamap_sync(sc->bfe_rx_tag, sc->bfe_rx_map,
BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE);
CSR_WRITE_4(sc, BFE_DMARX_PTR, (i * sizeof(struct bfe_desc)));
return (0);
}
static void
bfe_list_tx_init(struct bfe_softc *sc)
{
int i;
sc->bfe_tx_cnt = sc->bfe_tx_prod = sc->bfe_tx_cons = 0;
bzero(sc->bfe_tx_list, BFE_TX_LIST_SIZE);
for (i = 0; i < BFE_TX_LIST_CNT; i++)
sc->bfe_tx_ring[i].bfe_mbuf = NULL;
bus_dmamap_sync(sc->bfe_tx_tag, sc->bfe_tx_map,
BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE);
}
static void
bfe_discard_buf(struct bfe_softc *sc, int c)
{
struct bfe_rx_data *r;
struct bfe_desc *d;
r = &sc->bfe_rx_ring[c];
d = &sc->bfe_rx_list[c];
d->bfe_ctrl = htole32(r->bfe_ctrl);
}
static int
bfe_list_newbuf(struct bfe_softc *sc, int c)
{
struct bfe_rxheader *rx_header;
struct bfe_desc *d;
struct bfe_rx_data *r;
struct mbuf *m;
bus_dma_segment_t segs[1];
bus_dmamap_t map;
u_int32_t ctrl;
int nsegs;
m = m_getcl(M_NOWAIT, MT_DATA, M_PKTHDR);
if (m == NULL)
return (ENOBUFS);
m->m_len = m->m_pkthdr.len = MCLBYTES;
if (bus_dmamap_load_mbuf_sg(sc->bfe_rxmbuf_tag, sc->bfe_rx_sparemap,
m, segs, &nsegs, 0) != 0) {
m_freem(m);
return (ENOBUFS);
}
KASSERT(nsegs == 1, ("%s: %d segments returned!", __func__, nsegs));
r = &sc->bfe_rx_ring[c];
if (r->bfe_mbuf != NULL) {
bus_dmamap_sync(sc->bfe_rxmbuf_tag, r->bfe_map,
BUS_DMASYNC_POSTREAD);
bus_dmamap_unload(sc->bfe_rxmbuf_tag, r->bfe_map);
}
map = r->bfe_map;
r->bfe_map = sc->bfe_rx_sparemap;
sc->bfe_rx_sparemap = map;
r->bfe_mbuf = m;
rx_header = mtod(m, struct bfe_rxheader *);
rx_header->len = 0;
rx_header->flags = 0;
bus_dmamap_sync(sc->bfe_rxmbuf_tag, r->bfe_map, BUS_DMASYNC_PREREAD);
ctrl = segs[0].ds_len & BFE_DESC_LEN;
KASSERT(ctrl > ETHER_MAX_LEN + 32, ("%s: buffer size too small(%d)!",
__func__, ctrl));
if (c == BFE_RX_LIST_CNT - 1)
ctrl |= BFE_DESC_EOT;
r->bfe_ctrl = ctrl;
d = &sc->bfe_rx_list[c];
d->bfe_ctrl = htole32(ctrl);
/* The chip needs all addresses to be added to BFE_PCI_DMA. */
d->bfe_addr = htole32(BFE_ADDR_LO(segs[0].ds_addr) + BFE_PCI_DMA);
return (0);
}
static void
bfe_get_config(struct bfe_softc *sc)
{
u_int8_t eeprom[128];
bfe_read_eeprom(sc, eeprom);
sc->bfe_enaddr[0] = eeprom[79];
sc->bfe_enaddr[1] = eeprom[78];
sc->bfe_enaddr[2] = eeprom[81];
sc->bfe_enaddr[3] = eeprom[80];
sc->bfe_enaddr[4] = eeprom[83];
sc->bfe_enaddr[5] = eeprom[82];
sc->bfe_phyaddr = eeprom[90] & 0x1f;
sc->bfe_mdc_port = (eeprom[90] >> 14) & 0x1;
sc->bfe_core_unit = 0;
sc->bfe_dma_offset = BFE_PCI_DMA;
}
static void
bfe_pci_setup(struct bfe_softc *sc, u_int32_t cores)
{
u_int32_t bar_orig, pci_rev, val;
bar_orig = pci_read_config(sc->bfe_dev, BFE_BAR0_WIN, 4);
pci_write_config(sc->bfe_dev, BFE_BAR0_WIN, BFE_REG_PCI, 4);
pci_rev = CSR_READ_4(sc, BFE_SBIDHIGH) & BFE_RC_MASK;
val = CSR_READ_4(sc, BFE_SBINTVEC);
val |= cores;
CSR_WRITE_4(sc, BFE_SBINTVEC, val);
val = CSR_READ_4(sc, BFE_SSB_PCI_TRANS_2);
val |= BFE_SSB_PCI_PREF | BFE_SSB_PCI_BURST;
CSR_WRITE_4(sc, BFE_SSB_PCI_TRANS_2, val);
pci_write_config(sc->bfe_dev, BFE_BAR0_WIN, bar_orig, 4);
}
static void
bfe_clear_stats(struct bfe_softc *sc)
{
uint32_t reg;
BFE_LOCK_ASSERT(sc);
CSR_WRITE_4(sc, BFE_MIB_CTRL, BFE_MIB_CLR_ON_READ);
for (reg = BFE_TX_GOOD_O; reg <= BFE_TX_PAUSE; reg += 4)
CSR_READ_4(sc, reg);
for (reg = BFE_RX_GOOD_O; reg <= BFE_RX_NPAUSE; reg += 4)
CSR_READ_4(sc, reg);
}
static int
bfe_resetphy(struct bfe_softc *sc)
{
u_int32_t val;
bfe_writephy(sc, 0, BMCR_RESET);
DELAY(100);
bfe_readphy(sc, 0, &val);
if (val & BMCR_RESET) {
device_printf(sc->bfe_dev, "PHY Reset would not complete.\n");
return (ENXIO);
}
return (0);
}
static void
bfe_chip_halt(struct bfe_softc *sc)
{
BFE_LOCK_ASSERT(sc);
/* disable interrupts - not that it actually does..*/
CSR_WRITE_4(sc, BFE_IMASK, 0);
CSR_READ_4(sc, BFE_IMASK);
CSR_WRITE_4(sc, BFE_ENET_CTRL, BFE_ENET_DISABLE);
bfe_wait_bit(sc, BFE_ENET_CTRL, BFE_ENET_DISABLE, 200, 1);
CSR_WRITE_4(sc, BFE_DMARX_CTRL, 0);
CSR_WRITE_4(sc, BFE_DMATX_CTRL, 0);
DELAY(10);
}
static void
bfe_chip_reset(struct bfe_softc *sc)
{
u_int32_t val;
BFE_LOCK_ASSERT(sc);
/* Set the interrupt vector for the enet core */
bfe_pci_setup(sc, BFE_INTVEC_ENET0);
/* is core up? */
val = CSR_READ_4(sc, BFE_SBTMSLOW) &
(BFE_RESET | BFE_REJECT | BFE_CLOCK);
if (val == BFE_CLOCK) {
/* It is, so shut it down */
CSR_WRITE_4(sc, BFE_RCV_LAZY, 0);
CSR_WRITE_4(sc, BFE_ENET_CTRL, BFE_ENET_DISABLE);
bfe_wait_bit(sc, BFE_ENET_CTRL, BFE_ENET_DISABLE, 100, 1);
CSR_WRITE_4(sc, BFE_DMATX_CTRL, 0);
if (CSR_READ_4(sc, BFE_DMARX_STAT) & BFE_STAT_EMASK)
bfe_wait_bit(sc, BFE_DMARX_STAT, BFE_STAT_SIDLE,
100, 0);
CSR_WRITE_4(sc, BFE_DMARX_CTRL, 0);
}
bfe_core_reset(sc);
bfe_clear_stats(sc);
/*
* We want the phy registers to be accessible even when
* the driver is "downed" so initialize MDC preamble, frequency,
* and whether internal or external phy here.
*/
/* 4402 has 62.5Mhz SB clock and internal phy */
CSR_WRITE_4(sc, BFE_MDIO_CTRL, 0x8d);
/* Internal or external PHY? */
val = CSR_READ_4(sc, BFE_DEVCTRL);
if (!(val & BFE_IPP))
CSR_WRITE_4(sc, BFE_ENET_CTRL, BFE_ENET_EPSEL);
else if (CSR_READ_4(sc, BFE_DEVCTRL) & BFE_EPR) {
BFE_AND(sc, BFE_DEVCTRL, ~BFE_EPR);
DELAY(100);
}
/* Enable CRC32 generation and set proper LED modes */
BFE_OR(sc, BFE_MAC_CTRL, BFE_CTRL_CRC32_ENAB | BFE_CTRL_LED);
/* Reset or clear powerdown control bit */
BFE_AND(sc, BFE_MAC_CTRL, ~BFE_CTRL_PDOWN);
CSR_WRITE_4(sc, BFE_RCV_LAZY, ((1 << BFE_LAZY_FC_SHIFT) &
BFE_LAZY_FC_MASK));
/*
* We don't want lazy interrupts, so just send them at
* the end of a frame, please
*/
BFE_OR(sc, BFE_RCV_LAZY, 0);
/* Set max lengths, accounting for VLAN tags */
CSR_WRITE_4(sc, BFE_RXMAXLEN, ETHER_MAX_LEN+32);
CSR_WRITE_4(sc, BFE_TXMAXLEN, ETHER_MAX_LEN+32);
/* Set watermark XXX - magic */
CSR_WRITE_4(sc, BFE_TX_WMARK, 56);
/*
* Initialise DMA channels
* - not forgetting dma addresses need to be added to BFE_PCI_DMA
*/
CSR_WRITE_4(sc, BFE_DMATX_CTRL, BFE_TX_CTRL_ENABLE);
CSR_WRITE_4(sc, BFE_DMATX_ADDR, sc->bfe_tx_dma + BFE_PCI_DMA);
CSR_WRITE_4(sc, BFE_DMARX_CTRL, (BFE_RX_OFFSET << BFE_RX_CTRL_ROSHIFT) |
BFE_RX_CTRL_ENABLE);
CSR_WRITE_4(sc, BFE_DMARX_ADDR, sc->bfe_rx_dma + BFE_PCI_DMA);
bfe_resetphy(sc);
bfe_setupphy(sc);
}
static void
bfe_core_disable(struct bfe_softc *sc)
{
if ((CSR_READ_4(sc, BFE_SBTMSLOW)) & BFE_RESET)
return;
/*
* Set reject, wait for it set, then wait for the core to stop
* being busy, then set reset and reject and enable the clocks.
*/
CSR_WRITE_4(sc, BFE_SBTMSLOW, (BFE_REJECT | BFE_CLOCK));
bfe_wait_bit(sc, BFE_SBTMSLOW, BFE_REJECT, 1000, 0);
bfe_wait_bit(sc, BFE_SBTMSHIGH, BFE_BUSY, 1000, 1);
CSR_WRITE_4(sc, BFE_SBTMSLOW, (BFE_FGC | BFE_CLOCK | BFE_REJECT |
BFE_RESET));
CSR_READ_4(sc, BFE_SBTMSLOW);
DELAY(10);
/* Leave reset and reject set */
CSR_WRITE_4(sc, BFE_SBTMSLOW, (BFE_REJECT | BFE_RESET));
DELAY(10);
}
static void
bfe_core_reset(struct bfe_softc *sc)
{
u_int32_t val;
/* Disable the core */
bfe_core_disable(sc);
/* and bring it back up */
CSR_WRITE_4(sc, BFE_SBTMSLOW, (BFE_RESET | BFE_CLOCK | BFE_FGC));
CSR_READ_4(sc, BFE_SBTMSLOW);
DELAY(10);
/* Chip bug, clear SERR, IB and TO if they are set. */
if (CSR_READ_4(sc, BFE_SBTMSHIGH) & BFE_SERR)
CSR_WRITE_4(sc, BFE_SBTMSHIGH, 0);
val = CSR_READ_4(sc, BFE_SBIMSTATE);
if (val & (BFE_IBE | BFE_TO))
CSR_WRITE_4(sc, BFE_SBIMSTATE, val & ~(BFE_IBE | BFE_TO));
/* Clear reset and allow it to move through the core */
CSR_WRITE_4(sc, BFE_SBTMSLOW, (BFE_CLOCK | BFE_FGC));
CSR_READ_4(sc, BFE_SBTMSLOW);
DELAY(10);
/* Leave the clock set */
CSR_WRITE_4(sc, BFE_SBTMSLOW, BFE_CLOCK);
CSR_READ_4(sc, BFE_SBTMSLOW);
DELAY(10);
}
static void
bfe_cam_write(struct bfe_softc *sc, u_char *data, int index)
{
u_int32_t val;
val = ((u_int32_t) data[2]) << 24;
val |= ((u_int32_t) data[3]) << 16;
val |= ((u_int32_t) data[4]) << 8;
val |= ((u_int32_t) data[5]);
CSR_WRITE_4(sc, BFE_CAM_DATA_LO, val);
val = (BFE_CAM_HI_VALID |
(((u_int32_t) data[0]) << 8) |
(((u_int32_t) data[1])));
CSR_WRITE_4(sc, BFE_CAM_DATA_HI, val);
CSR_WRITE_4(sc, BFE_CAM_CTRL, (BFE_CAM_WRITE |
((u_int32_t) index << BFE_CAM_INDEX_SHIFT)));
bfe_wait_bit(sc, BFE_CAM_CTRL, BFE_CAM_BUSY, 10000, 1);
}
static u_int
bfe_write_maddr(void *arg, struct sockaddr_dl *sdl, u_int cnt)
{
struct bfe_softc *sc = arg;
bfe_cam_write(sc, LLADDR(sdl), cnt + 1);
return (1);
}
static void
bfe_set_rx_mode(struct bfe_softc *sc)
{
struct ifnet *ifp = sc->bfe_ifp;
u_int32_t val;
BFE_LOCK_ASSERT(sc);
val = CSR_READ_4(sc, BFE_RXCONF);
if (ifp->if_flags & IFF_PROMISC)
val |= BFE_RXCONF_PROMISC;
else
val &= ~BFE_RXCONF_PROMISC;
if (ifp->if_flags & IFF_BROADCAST)
val &= ~BFE_RXCONF_DBCAST;
else
val |= BFE_RXCONF_DBCAST;
CSR_WRITE_4(sc, BFE_CAM_CTRL, 0);
bfe_cam_write(sc, IF_LLADDR(sc->bfe_ifp), 0);
if (ifp->if_flags & IFF_ALLMULTI)
val |= BFE_RXCONF_ALLMULTI;
else {
val &= ~BFE_RXCONF_ALLMULTI;
if_foreach_llmaddr(ifp, bfe_write_maddr, sc);
}
CSR_WRITE_4(sc, BFE_RXCONF, val);
BFE_OR(sc, BFE_CAM_CTRL, BFE_CAM_ENABLE);
}
static void
bfe_dma_map(void *arg, bus_dma_segment_t *segs, int nseg, int error)
{
struct bfe_dmamap_arg *ctx;
if (error != 0)
return;
KASSERT(nseg == 1, ("%s : %d segments returned!", __func__, nseg));
ctx = (struct bfe_dmamap_arg *)arg;
ctx->bfe_busaddr = segs[0].ds_addr;
}
static void
bfe_release_resources(struct bfe_softc *sc)
{
if (sc->bfe_intrhand != NULL)
bus_teardown_intr(sc->bfe_dev, sc->bfe_irq, sc->bfe_intrhand);
if (sc->bfe_irq != NULL)
bus_release_resource(sc->bfe_dev, SYS_RES_IRQ, 0, sc->bfe_irq);
if (sc->bfe_res != NULL)
bus_release_resource(sc->bfe_dev, SYS_RES_MEMORY, PCIR_BAR(0),
sc->bfe_res);
if (sc->bfe_ifp != NULL)
if_free(sc->bfe_ifp);
}
static void
bfe_read_eeprom(struct bfe_softc *sc, u_int8_t *data)
{
long i;
u_int16_t *ptr = (u_int16_t *)data;
for(i = 0; i < 128; i += 2)
ptr[i/2] = CSR_READ_4(sc, 4096 + i);
}
static int
bfe_wait_bit(struct bfe_softc *sc, u_int32_t reg, u_int32_t bit,
u_long timeout, const int clear)
{
u_long i;
for (i = 0; i < timeout; i++) {
u_int32_t val = CSR_READ_4(sc, reg);
if (clear && !(val & bit))
break;
if (!clear && (val & bit))
break;
DELAY(10);
}
if (i == timeout) {
device_printf(sc->bfe_dev,
"BUG! Timeout waiting for bit %08x of register "
"%x to %s.\n", bit, reg, (clear ? "clear" : "set"));
return (-1);
}
return (0);
}
static int
bfe_readphy(struct bfe_softc *sc, u_int32_t reg, u_int32_t *val)
{
int err;
/* Clear MII ISR */
CSR_WRITE_4(sc, BFE_EMAC_ISTAT, BFE_EMAC_INT_MII);
CSR_WRITE_4(sc, BFE_MDIO_DATA, (BFE_MDIO_SB_START |
(BFE_MDIO_OP_READ << BFE_MDIO_OP_SHIFT) |
(sc->bfe_phyaddr << BFE_MDIO_PMD_SHIFT) |
(reg << BFE_MDIO_RA_SHIFT) |
(BFE_MDIO_TA_VALID << BFE_MDIO_TA_SHIFT)));
err = bfe_wait_bit(sc, BFE_EMAC_ISTAT, BFE_EMAC_INT_MII, 100, 0);
*val = CSR_READ_4(sc, BFE_MDIO_DATA) & BFE_MDIO_DATA_DATA;
return (err);
}
static int
bfe_writephy(struct bfe_softc *sc, u_int32_t reg, u_int32_t val)
{
int status;
CSR_WRITE_4(sc, BFE_EMAC_ISTAT, BFE_EMAC_INT_MII);
CSR_WRITE_4(sc, BFE_MDIO_DATA, (BFE_MDIO_SB_START |
(BFE_MDIO_OP_WRITE << BFE_MDIO_OP_SHIFT) |
(sc->bfe_phyaddr << BFE_MDIO_PMD_SHIFT) |
(reg << BFE_MDIO_RA_SHIFT) |
(BFE_MDIO_TA_VALID << BFE_MDIO_TA_SHIFT) |
(val & BFE_MDIO_DATA_DATA)));
status = bfe_wait_bit(sc, BFE_EMAC_ISTAT, BFE_EMAC_INT_MII, 100, 0);
return (status);
}
/*
* XXX - I think this is handled by the PHY driver, but it can't hurt to do it
* twice
*/
static int
bfe_setupphy(struct bfe_softc *sc)
{
u_int32_t val;
/* Enable activity LED */
bfe_readphy(sc, 26, &val);
bfe_writephy(sc, 26, val & 0x7fff);
bfe_readphy(sc, 26, &val);
/* Enable traffic meter LED mode */
bfe_readphy(sc, 27, &val);
bfe_writephy(sc, 27, val | (1 << 6));
return (0);
}
static void
bfe_stats_update(struct bfe_softc *sc)
{
struct bfe_hw_stats *stats;
struct ifnet *ifp;
uint32_t mib[BFE_MIB_CNT];
uint32_t reg, *val;
BFE_LOCK_ASSERT(sc);
val = mib;
CSR_WRITE_4(sc, BFE_MIB_CTRL, BFE_MIB_CLR_ON_READ);
for (reg = BFE_TX_GOOD_O; reg <= BFE_TX_PAUSE; reg += 4)
*val++ = CSR_READ_4(sc, reg);
for (reg = BFE_RX_GOOD_O; reg <= BFE_RX_NPAUSE; reg += 4)
*val++ = CSR_READ_4(sc, reg);
ifp = sc->bfe_ifp;
stats = &sc->bfe_stats;
/* Tx stat. */
stats->tx_good_octets += mib[MIB_TX_GOOD_O];
stats->tx_good_frames += mib[MIB_TX_GOOD_P];
stats->tx_octets += mib[MIB_TX_O];
stats->tx_frames += mib[MIB_TX_P];
stats->tx_bcast_frames += mib[MIB_TX_BCAST];
stats->tx_mcast_frames += mib[MIB_TX_MCAST];
stats->tx_pkts_64 += mib[MIB_TX_64];
stats->tx_pkts_65_127 += mib[MIB_TX_65_127];
stats->tx_pkts_128_255 += mib[MIB_TX_128_255];
stats->tx_pkts_256_511 += mib[MIB_TX_256_511];
stats->tx_pkts_512_1023 += mib[MIB_TX_512_1023];
stats->tx_pkts_1024_max += mib[MIB_TX_1024_MAX];
stats->tx_jabbers += mib[MIB_TX_JABBER];
stats->tx_oversize_frames += mib[MIB_TX_OSIZE];
stats->tx_frag_frames += mib[MIB_TX_FRAG];
stats->tx_underruns += mib[MIB_TX_URUNS];
stats->tx_colls += mib[MIB_TX_TCOLS];
stats->tx_single_colls += mib[MIB_TX_SCOLS];
stats->tx_multi_colls += mib[MIB_TX_MCOLS];
stats->tx_excess_colls += mib[MIB_TX_ECOLS];
stats->tx_late_colls += mib[MIB_TX_LCOLS];
stats->tx_deferrals += mib[MIB_TX_DEFERED];
stats->tx_carrier_losts += mib[MIB_TX_CLOST];
stats->tx_pause_frames += mib[MIB_TX_PAUSE];
/* Rx stat. */
stats->rx_good_octets += mib[MIB_RX_GOOD_O];
stats->rx_good_frames += mib[MIB_RX_GOOD_P];
stats->rx_octets += mib[MIB_RX_O];
stats->rx_frames += mib[MIB_RX_P];
stats->rx_bcast_frames += mib[MIB_RX_BCAST];
stats->rx_mcast_frames += mib[MIB_RX_MCAST];
stats->rx_pkts_64 += mib[MIB_RX_64];
stats->rx_pkts_65_127 += mib[MIB_RX_65_127];
stats->rx_pkts_128_255 += mib[MIB_RX_128_255];
stats->rx_pkts_256_511 += mib[MIB_RX_256_511];
stats->rx_pkts_512_1023 += mib[MIB_RX_512_1023];
stats->rx_pkts_1024_max += mib[MIB_RX_1024_MAX];
stats->rx_jabbers += mib[MIB_RX_JABBER];
stats->rx_oversize_frames += mib[MIB_RX_OSIZE];
stats->rx_frag_frames += mib[MIB_RX_FRAG];
stats->rx_missed_frames += mib[MIB_RX_MISS];
stats->rx_crc_align_errs += mib[MIB_RX_CRCA];
stats->rx_runts += mib[MIB_RX_USIZE];
stats->rx_crc_errs += mib[MIB_RX_CRC];
stats->rx_align_errs += mib[MIB_RX_ALIGN];
stats->rx_symbol_errs += mib[MIB_RX_SYM];
stats->rx_pause_frames += mib[MIB_RX_PAUSE];
stats->rx_control_frames += mib[MIB_RX_NPAUSE];
/* Update counters in ifnet. */
if_inc_counter(ifp, IFCOUNTER_OPACKETS, (u_long)mib[MIB_TX_GOOD_P]);
if_inc_counter(ifp, IFCOUNTER_COLLISIONS, (u_long)mib[MIB_TX_TCOLS]);
if_inc_counter(ifp, IFCOUNTER_OERRORS, (u_long)mib[MIB_TX_URUNS] +
(u_long)mib[MIB_TX_ECOLS] +
(u_long)mib[MIB_TX_DEFERED] +
(u_long)mib[MIB_TX_CLOST]);
if_inc_counter(ifp, IFCOUNTER_IPACKETS, (u_long)mib[MIB_RX_GOOD_P]);
if_inc_counter(ifp, IFCOUNTER_IERRORS, mib[MIB_RX_JABBER] +
mib[MIB_RX_MISS] +
mib[MIB_RX_CRCA] +
mib[MIB_RX_USIZE] +
mib[MIB_RX_CRC] +
mib[MIB_RX_ALIGN] +
mib[MIB_RX_SYM]);
}
static void
bfe_txeof(struct bfe_softc *sc)
{
struct bfe_tx_data *r;
struct ifnet *ifp;
int i, chipidx;
BFE_LOCK_ASSERT(sc);
ifp = sc->bfe_ifp;
chipidx = CSR_READ_4(sc, BFE_DMATX_STAT) & BFE_STAT_CDMASK;
chipidx /= sizeof(struct bfe_desc);
i = sc->bfe_tx_cons;
if (i == chipidx)
return;
bus_dmamap_sync(sc->bfe_tx_tag, sc->bfe_tx_map,
BUS_DMASYNC_POSTREAD | BUS_DMASYNC_POSTWRITE);
/* Go through the mbufs and free those that have been transmitted */
for (; i != chipidx; BFE_INC(i, BFE_TX_LIST_CNT)) {
r = &sc->bfe_tx_ring[i];
sc->bfe_tx_cnt--;
if (r->bfe_mbuf == NULL)
continue;
bus_dmamap_sync(sc->bfe_txmbuf_tag, r->bfe_map,
BUS_DMASYNC_POSTWRITE);
bus_dmamap_unload(sc->bfe_txmbuf_tag, r->bfe_map);
m_freem(r->bfe_mbuf);
r->bfe_mbuf = NULL;
}
if (i != sc->bfe_tx_cons) {
/* we freed up some mbufs */
sc->bfe_tx_cons = i;
ifp->if_drv_flags &= ~IFF_DRV_OACTIVE;
}
if (sc->bfe_tx_cnt == 0)
sc->bfe_watchdog_timer = 0;
}
/* Pass a received packet up the stack */
static void
bfe_rxeof(struct bfe_softc *sc)
{
struct mbuf *m;
struct ifnet *ifp;
struct bfe_rxheader *rxheader;
struct bfe_rx_data *r;
int cons, prog;
u_int32_t status, current, len, flags;
BFE_LOCK_ASSERT(sc);
cons = sc->bfe_rx_cons;
status = CSR_READ_4(sc, BFE_DMARX_STAT);
current = (status & BFE_STAT_CDMASK) / sizeof(struct bfe_desc);
ifp = sc->bfe_ifp;
bus_dmamap_sync(sc->bfe_rx_tag, sc->bfe_rx_map,
BUS_DMASYNC_POSTREAD | BUS_DMASYNC_POSTWRITE);
for (prog = 0; current != cons; prog++,
BFE_INC(cons, BFE_RX_LIST_CNT)) {
r = &sc->bfe_rx_ring[cons];
m = r->bfe_mbuf;
/*
* Rx status should be read from mbuf such that we can't
* delay bus_dmamap_sync(9). This hardware limiation
* results in inefficent mbuf usage as bfe(4) couldn't
* reuse mapped buffer from errored frame.
*/
if (bfe_list_newbuf(sc, cons) != 0) {
if_inc_counter(ifp, IFCOUNTER_IQDROPS, 1);
bfe_discard_buf(sc, cons);
continue;
}
rxheader = mtod(m, struct bfe_rxheader*);
len = le16toh(rxheader->len);
flags = le16toh(rxheader->flags);
/* Remove CRC bytes. */
len -= ETHER_CRC_LEN;
/* flag an error and try again */
if ((len > ETHER_MAX_LEN+32) || (flags & BFE_RX_FLAG_ERRORS)) {
m_freem(m);
continue;
}
/* Make sure to skip header bytes written by hardware. */
m_adj(m, BFE_RX_OFFSET);
m->m_len = m->m_pkthdr.len = len;
m->m_pkthdr.rcvif = ifp;
BFE_UNLOCK(sc);
(*ifp->if_input)(ifp, m);
BFE_LOCK(sc);
}
if (prog > 0) {
sc->bfe_rx_cons = cons;
bus_dmamap_sync(sc->bfe_rx_tag, sc->bfe_rx_map,
BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE);
}
}
static void
bfe_intr(void *xsc)
{
struct bfe_softc *sc = xsc;
struct ifnet *ifp;
u_int32_t istat;
ifp = sc->bfe_ifp;
BFE_LOCK(sc);
istat = CSR_READ_4(sc, BFE_ISTAT);
/*
* Defer unsolicited interrupts - This is necessary because setting the
* chips interrupt mask register to 0 doesn't actually stop the
* interrupts
*/
istat &= BFE_IMASK_DEF;
CSR_WRITE_4(sc, BFE_ISTAT, istat);
CSR_READ_4(sc, BFE_ISTAT);
/* not expecting this interrupt, disregard it */
if (istat == 0 || (ifp->if_drv_flags & IFF_DRV_RUNNING) == 0) {
BFE_UNLOCK(sc);
return;
}
/* A packet was received */
if (istat & BFE_ISTAT_RX)
bfe_rxeof(sc);
/* A packet was sent */
if (istat & BFE_ISTAT_TX)
bfe_txeof(sc);
if (istat & BFE_ISTAT_ERRORS) {
if (istat & BFE_ISTAT_DSCE) {
device_printf(sc->bfe_dev, "Descriptor Error\n");
bfe_stop(sc);
BFE_UNLOCK(sc);
return;
}
if (istat & BFE_ISTAT_DPE) {
device_printf(sc->bfe_dev,
"Descriptor Protocol Error\n");
bfe_stop(sc);
BFE_UNLOCK(sc);
return;
}
ifp->if_drv_flags &= ~IFF_DRV_RUNNING;
bfe_init_locked(sc);
}
/* We have packets pending, fire them out */
if (!IFQ_DRV_IS_EMPTY(&ifp->if_snd))
bfe_start_locked(ifp);
BFE_UNLOCK(sc);
}
static int
bfe_encap(struct bfe_softc *sc, struct mbuf **m_head)
{
struct bfe_desc *d;
struct bfe_tx_data *r, *r1;
struct mbuf *m;
bus_dmamap_t map;
bus_dma_segment_t txsegs[BFE_MAXTXSEGS];
uint32_t cur, si;
int error, i, nsegs;
BFE_LOCK_ASSERT(sc);
M_ASSERTPKTHDR((*m_head));
si = cur = sc->bfe_tx_prod;
r = &sc->bfe_tx_ring[cur];
error = bus_dmamap_load_mbuf_sg(sc->bfe_txmbuf_tag, r->bfe_map, *m_head,
txsegs, &nsegs, 0);
if (error == EFBIG) {
m = m_collapse(*m_head, M_NOWAIT, BFE_MAXTXSEGS);
if (m == NULL) {
m_freem(*m_head);
*m_head = NULL;
return (ENOMEM);
}
*m_head = m;
error = bus_dmamap_load_mbuf_sg(sc->bfe_txmbuf_tag, r->bfe_map,
*m_head, txsegs, &nsegs, 0);
if (error != 0) {
m_freem(*m_head);
*m_head = NULL;
return (error);
}
} else if (error != 0)
return (error);
if (nsegs == 0) {
m_freem(*m_head);
*m_head = NULL;
return (EIO);
}
if (sc->bfe_tx_cnt + nsegs > BFE_TX_LIST_CNT - 1) {
bus_dmamap_unload(sc->bfe_txmbuf_tag, r->bfe_map);
return (ENOBUFS);
}
for (i = 0; i < nsegs; i++) {
d = &sc->bfe_tx_list[cur];
d->bfe_ctrl = htole32(txsegs[i].ds_len & BFE_DESC_LEN);
d->bfe_ctrl |= htole32(BFE_DESC_IOC);
if (cur == BFE_TX_LIST_CNT - 1)
/*
* Tell the chip to wrap to the start of
* the descriptor list.
*/
d->bfe_ctrl |= htole32(BFE_DESC_EOT);
/* The chip needs all addresses to be added to BFE_PCI_DMA. */
d->bfe_addr = htole32(BFE_ADDR_LO(txsegs[i].ds_addr) +
BFE_PCI_DMA);
BFE_INC(cur, BFE_TX_LIST_CNT);
}
/* Update producer index. */
sc->bfe_tx_prod = cur;
/* Set EOF on the last descriptor. */
cur = (cur + BFE_TX_LIST_CNT - 1) % BFE_TX_LIST_CNT;
d = &sc->bfe_tx_list[cur];
d->bfe_ctrl |= htole32(BFE_DESC_EOF);
/* Lastly set SOF on the first descriptor to avoid races. */
d = &sc->bfe_tx_list[si];
d->bfe_ctrl |= htole32(BFE_DESC_SOF);
r1 = &sc->bfe_tx_ring[cur];
map = r->bfe_map;
r->bfe_map = r1->bfe_map;
r1->bfe_map = map;
r1->bfe_mbuf = *m_head;
sc->bfe_tx_cnt += nsegs;
bus_dmamap_sync(sc->bfe_txmbuf_tag, map, BUS_DMASYNC_PREWRITE);
return (0);
}
/*
* Set up to transmit a packet.
*/
static void
bfe_start(struct ifnet *ifp)
{
BFE_LOCK((struct bfe_softc *)ifp->if_softc);
bfe_start_locked(ifp);
BFE_UNLOCK((struct bfe_softc *)ifp->if_softc);
}
/*
* Set up to transmit a packet. The softc is already locked.
*/
static void
bfe_start_locked(struct ifnet *ifp)
{
struct bfe_softc *sc;
struct mbuf *m_head;
int queued;
sc = ifp->if_softc;
BFE_LOCK_ASSERT(sc);
/*
* Not much point trying to send if the link is down
* or we have nothing to send.
*/
if ((ifp->if_drv_flags & (IFF_DRV_RUNNING | IFF_DRV_OACTIVE)) !=
IFF_DRV_RUNNING || (sc->bfe_flags & BFE_FLAG_LINK) == 0)
return;
for (queued = 0; !IFQ_DRV_IS_EMPTY(&ifp->if_snd) &&
sc->bfe_tx_cnt < BFE_TX_LIST_CNT - 1;) {
IFQ_DRV_DEQUEUE(&ifp->if_snd, m_head);
if (m_head == NULL)
break;
/*
* Pack the data into the tx ring. If we dont have
* enough room, let the chip drain the ring.
*/
if (bfe_encap(sc, &m_head)) {
if (m_head == NULL)
break;
IFQ_DRV_PREPEND(&ifp->if_snd, m_head);
ifp->if_drv_flags |= IFF_DRV_OACTIVE;
break;
}
queued++;
/*
* If there's a BPF listener, bounce a copy of this frame
* to him.
*/
BPF_MTAP(ifp, m_head);
}
if (queued) {
bus_dmamap_sync(sc->bfe_tx_tag, sc->bfe_tx_map,
BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE);
/* Transmit - twice due to apparent hardware bug */
CSR_WRITE_4(sc, BFE_DMATX_PTR,
sc->bfe_tx_prod * sizeof(struct bfe_desc));
/*
* XXX It seems the following write is not necessary
* to kick Tx command. What might be required would be
* a way flushing PCI posted write. Reading the register
* back ensures the flush operation. In addition,
* hardware will execute PCI posted write in the long
* run and watchdog timer for the kick command was set
* to 5 seconds. Therefore I think the second write
* access is not necessary or could be replaced with
* read operation.
*/
CSR_WRITE_4(sc, BFE_DMATX_PTR,
sc->bfe_tx_prod * sizeof(struct bfe_desc));
/*
* Set a timeout in case the chip goes out to lunch.
*/
sc->bfe_watchdog_timer = 5;
}
}
static void
bfe_init(void *xsc)
{
BFE_LOCK((struct bfe_softc *)xsc);
bfe_init_locked(xsc);
BFE_UNLOCK((struct bfe_softc *)xsc);
}
static void
bfe_init_locked(void *xsc)
{
struct bfe_softc *sc = (struct bfe_softc*)xsc;
struct ifnet *ifp = sc->bfe_ifp;
struct mii_data *mii;
BFE_LOCK_ASSERT(sc);
mii = device_get_softc(sc->bfe_miibus);
if (ifp->if_drv_flags & IFF_DRV_RUNNING)
return;
bfe_stop(sc);
bfe_chip_reset(sc);
if (bfe_list_rx_init(sc) == ENOBUFS) {
device_printf(sc->bfe_dev,
"%s: Not enough memory for list buffers\n", __func__);
bfe_stop(sc);
return;
}
bfe_list_tx_init(sc);
bfe_set_rx_mode(sc);
/* Enable the chip and core */
BFE_OR(sc, BFE_ENET_CTRL, BFE_ENET_ENABLE);
/* Enable interrupts */
CSR_WRITE_4(sc, BFE_IMASK, BFE_IMASK_DEF);
/* Clear link state and change media. */
sc->bfe_flags &= ~BFE_FLAG_LINK;
mii_mediachg(mii);
ifp->if_drv_flags |= IFF_DRV_RUNNING;
ifp->if_drv_flags &= ~IFF_DRV_OACTIVE;
callout_reset(&sc->bfe_stat_co, hz, bfe_tick, sc);
}
/*
* Set media options.
*/
static int
bfe_ifmedia_upd(struct ifnet *ifp)
{
struct bfe_softc *sc;
struct mii_data *mii;
struct mii_softc *miisc;
int error;
sc = ifp->if_softc;
BFE_LOCK(sc);
mii = device_get_softc(sc->bfe_miibus);
LIST_FOREACH(miisc, &mii->mii_phys, mii_list)
PHY_RESET(miisc);
error = mii_mediachg(mii);
BFE_UNLOCK(sc);
return (error);
}
/*
* Report current media status.
*/
static void
bfe_ifmedia_sts(struct ifnet *ifp, struct ifmediareq *ifmr)
{
struct bfe_softc *sc = ifp->if_softc;
struct mii_data *mii;
BFE_LOCK(sc);
mii = device_get_softc(sc->bfe_miibus);
mii_pollstat(mii);
ifmr->ifm_active = mii->mii_media_active;
ifmr->ifm_status = mii->mii_media_status;
BFE_UNLOCK(sc);
}
static int
bfe_ioctl(struct ifnet *ifp, u_long command, caddr_t data)
{
struct bfe_softc *sc = ifp->if_softc;
struct ifreq *ifr = (struct ifreq *) data;
struct mii_data *mii;
int error = 0;
switch (command) {
case SIOCSIFFLAGS:
BFE_LOCK(sc);
if (ifp->if_flags & IFF_UP) {
if (ifp->if_drv_flags & IFF_DRV_RUNNING)
bfe_set_rx_mode(sc);
else if ((sc->bfe_flags & BFE_FLAG_DETACH) == 0)
bfe_init_locked(sc);
} else if (ifp->if_drv_flags & IFF_DRV_RUNNING)
bfe_stop(sc);
BFE_UNLOCK(sc);
break;
case SIOCADDMULTI:
case SIOCDELMULTI:
BFE_LOCK(sc);
if (ifp->if_drv_flags & IFF_DRV_RUNNING)
bfe_set_rx_mode(sc);
BFE_UNLOCK(sc);
break;
case SIOCGIFMEDIA:
case SIOCSIFMEDIA:
mii = device_get_softc(sc->bfe_miibus);
error = ifmedia_ioctl(ifp, ifr, &mii->mii_media, command);
break;
default:
error = ether_ioctl(ifp, command, data);
break;
}
return (error);
}
static void
bfe_watchdog(struct bfe_softc *sc)
{
struct ifnet *ifp;
BFE_LOCK_ASSERT(sc);
if (sc->bfe_watchdog_timer == 0 || --sc->bfe_watchdog_timer)
return;
ifp = sc->bfe_ifp;
device_printf(sc->bfe_dev, "watchdog timeout -- resetting\n");
if_inc_counter(ifp, IFCOUNTER_OERRORS, 1);
ifp->if_drv_flags &= ~IFF_DRV_RUNNING;
bfe_init_locked(sc);
if (!IFQ_DRV_IS_EMPTY(&ifp->if_snd))
bfe_start_locked(ifp);
}
static void
bfe_tick(void *xsc)
{
struct bfe_softc *sc = xsc;
struct mii_data *mii;
BFE_LOCK_ASSERT(sc);
mii = device_get_softc(sc->bfe_miibus);
mii_tick(mii);
bfe_stats_update(sc);
bfe_watchdog(sc);
callout_reset(&sc->bfe_stat_co, hz, bfe_tick, sc);
}
/*
* Stop the adapter and free any mbufs allocated to the
* RX and TX lists.
*/
static void
bfe_stop(struct bfe_softc *sc)
{
struct ifnet *ifp;
BFE_LOCK_ASSERT(sc);
ifp = sc->bfe_ifp;
ifp->if_drv_flags &= ~(IFF_DRV_RUNNING | IFF_DRV_OACTIVE);
sc->bfe_flags &= ~BFE_FLAG_LINK;
callout_stop(&sc->bfe_stat_co);
sc->bfe_watchdog_timer = 0;
bfe_chip_halt(sc);
bfe_tx_ring_free(sc);
bfe_rx_ring_free(sc);
}
static int
sysctl_bfe_stats(SYSCTL_HANDLER_ARGS)
{
struct bfe_softc *sc;
struct bfe_hw_stats *stats;
int error, result;
result = -1;
error = sysctl_handle_int(oidp, &result, 0, req);
if (error != 0 || req->newptr == NULL)
return (error);
if (result != 1)
return (error);
sc = (struct bfe_softc *)arg1;
stats = &sc->bfe_stats;
printf("%s statistics:\n", device_get_nameunit(sc->bfe_dev));
printf("Transmit good octets : %ju\n",
(uintmax_t)stats->tx_good_octets);
printf("Transmit good frames : %ju\n",
(uintmax_t)stats->tx_good_frames);
printf("Transmit octets : %ju\n",
(uintmax_t)stats->tx_octets);
printf("Transmit frames : %ju\n",
(uintmax_t)stats->tx_frames);
printf("Transmit broadcast frames : %ju\n",
(uintmax_t)stats->tx_bcast_frames);
printf("Transmit multicast frames : %ju\n",
(uintmax_t)stats->tx_mcast_frames);
printf("Transmit frames 64 bytes : %ju\n",
(uint64_t)stats->tx_pkts_64);
printf("Transmit frames 65 to 127 bytes : %ju\n",
(uint64_t)stats->tx_pkts_65_127);
printf("Transmit frames 128 to 255 bytes : %ju\n",
(uint64_t)stats->tx_pkts_128_255);
printf("Transmit frames 256 to 511 bytes : %ju\n",
(uint64_t)stats->tx_pkts_256_511);
printf("Transmit frames 512 to 1023 bytes : %ju\n",
(uint64_t)stats->tx_pkts_512_1023);
printf("Transmit frames 1024 to max bytes : %ju\n",
(uint64_t)stats->tx_pkts_1024_max);
printf("Transmit jabber errors : %u\n", stats->tx_jabbers);
printf("Transmit oversized frames : %ju\n",
(uint64_t)stats->tx_oversize_frames);
printf("Transmit fragmented frames : %ju\n",
(uint64_t)stats->tx_frag_frames);
printf("Transmit underruns : %u\n", stats->tx_colls);
printf("Transmit total collisions : %u\n", stats->tx_single_colls);
printf("Transmit single collisions : %u\n", stats->tx_single_colls);
printf("Transmit multiple collisions : %u\n", stats->tx_multi_colls);
printf("Transmit excess collisions : %u\n", stats->tx_excess_colls);
printf("Transmit late collisions : %u\n", stats->tx_late_colls);
printf("Transmit deferrals : %u\n", stats->tx_deferrals);
printf("Transmit carrier losts : %u\n", stats->tx_carrier_losts);
printf("Transmit pause frames : %u\n", stats->tx_pause_frames);
printf("Receive good octets : %ju\n",
(uintmax_t)stats->rx_good_octets);
printf("Receive good frames : %ju\n",
(uintmax_t)stats->rx_good_frames);
printf("Receive octets : %ju\n",
(uintmax_t)stats->rx_octets);
printf("Receive frames : %ju\n",
(uintmax_t)stats->rx_frames);
printf("Receive broadcast frames : %ju\n",
(uintmax_t)stats->rx_bcast_frames);
printf("Receive multicast frames : %ju\n",
(uintmax_t)stats->rx_mcast_frames);
printf("Receive frames 64 bytes : %ju\n",
(uint64_t)stats->rx_pkts_64);
printf("Receive frames 65 to 127 bytes : %ju\n",
(uint64_t)stats->rx_pkts_65_127);
printf("Receive frames 128 to 255 bytes : %ju\n",
(uint64_t)stats->rx_pkts_128_255);
printf("Receive frames 256 to 511 bytes : %ju\n",
(uint64_t)stats->rx_pkts_256_511);
printf("Receive frames 512 to 1023 bytes : %ju\n",
(uint64_t)stats->rx_pkts_512_1023);
printf("Receive frames 1024 to max bytes : %ju\n",
(uint64_t)stats->rx_pkts_1024_max);
printf("Receive jabber errors : %u\n", stats->rx_jabbers);
printf("Receive oversized frames : %ju\n",
(uint64_t)stats->rx_oversize_frames);
printf("Receive fragmented frames : %ju\n",
(uint64_t)stats->rx_frag_frames);
printf("Receive missed frames : %u\n", stats->rx_missed_frames);
printf("Receive CRC align errors : %u\n", stats->rx_crc_align_errs);
printf("Receive undersized frames : %u\n", stats->rx_runts);
printf("Receive CRC errors : %u\n", stats->rx_crc_errs);
printf("Receive align errors : %u\n", stats->rx_align_errs);
printf("Receive symbol errors : %u\n", stats->rx_symbol_errs);
printf("Receive pause frames : %u\n", stats->rx_pause_frames);
printf("Receive control frames : %u\n", stats->rx_control_frames);
return (error);
}
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