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freebsd-dev/sys/pci/if_tx.c

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/* $OpenBSD: if_tx.c,v 1.3 1998/10/10 04:30:09 jason Exp $ */
/* $Id: if_tx.c,v 1.16 1998/11/01 07:44:33 semenu Exp $ */
/*-
* Copyright (c) 1997 Semen Ustimenko (semen@iclub.nsu.ru)
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
*
*/
/*
* EtherPower II 10/100 Fast Ethernet (tx0)
* (aka SMC9432TX based on SMC83c170 EPIC chip)
*
* Thanks are going to Steve Bauer and Jason Wright.
*
* todo:
* Deal with bus mastering, i.e. i realy don't know what to do with
* it and how it can improve performance.
* Implement FULL IFF_MULTICAST support.
* Test, test and test again:-(
*
*/
/* We should define compile time options before if_txvar.h included */
/*#define EPIC_NOIFMEDIA 1*/
/*#define EPIC_USEIOSPACE 1*/
#define EARLY_RX 1
/*#define EPIC_DEBUG 1*/
#if defined(EPIC_DEBUG)
#define dprintf(a) printf a
#else
#define dprintf(a)
#endif
/* Macro to get either mbuf cluster or nothing */
#define EPIC_MGETCLUSTER(m) \
{ MGETHDR((m),M_DONTWAIT,MT_DATA); \
if (m) { \
MCLGET((m),M_DONTWAIT); \
if( NULL == ((m)->m_flags & M_EXT) ){ \
m_freem(m); \
(m) = NULL; \
} \
} \
}
#include "bpfilter.h"
#include "pci.h"
#if NPCI > 0
#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 <sys/sockio.h>
#include <net/if.h>
#include <net/if_dl.h>
#include <net/if_types.h>
#if !defined(SIOCSIFMEDIA) || defined(EPIC_NOIFMEDIA)
#define EPIC_NOIFMEDIA 1
#else
#include <net/if_media.h>
#endif
#ifdef INET
#include <netinet/in.h>
#include <netinet/in_systm.h>
#include <netinet/in_var.h>
#include <netinet/ip.h>
#endif
#ifdef IPX
#include <netipx/ipx.h>
#include <netipx/ipx_if.h>
#endif
#ifdef NS
#include <netns/ns.h>
#include <netns/ns_if.h>
#endif
#if NBPFILTER > 0
#include <net/bpf.h>
#include <net/bpfdesc.h>
#endif
#if defined(__OpenBSD__)
#include <sys/ioctl.h>
#include <sys/errno.h>
#include <sys/device.h>
#include <netinet/if_ether.h>
#include <vm/vm.h>
#include <dev/pci/pcivar.h>
#include <dev/pci/pcireg.h>
#include <dev/pci/pcidevs.h>
#include <dev/pci/if_txvar.h>
#else /* __FreeBSD__ */
#include <net/if_mib.h>
#include <netinet/in.h>
#include <netinet/if_ether.h>
#include <vm/vm.h>
#include <vm/pmap.h>
#include <machine/clock.h>
#include <pci/pcivar.h>
#include <pci/if_txvar.h>
#endif
#if defined(__FreeBSD__)
#if __FreeBSD_version >= 300000
#define EPIC_IFIOCTL_CMD_TYPE u_long
#else
#define EPIC_IFIOCTL_CMD_TYPE int
#endif
#define EPIC_INTR_RET_TYPE void
#else /* __OpenBSD__ */
#define EPIC_IFIOCTL_CMD_TYPE u_long
#define EPIC_INTR_RET_TYPE int
#endif
static int epic_ifioctl __P((register struct ifnet *, EPIC_IFIOCTL_CMD_TYPE, caddr_t));
static EPIC_INTR_RET_TYPE epic_intr __P((void *));
static int epic_common_attach __P((epic_softc_t *));
static void epic_ifstart __P((struct ifnet *));
static void epic_ifwatchdog __P((struct ifnet *));
static int epic_init __P((epic_softc_t *));
static void epic_stop __P((epic_softc_t *));
static __inline void epic_rx_done __P((epic_softc_t *));
static __inline void epic_tx_done __P((epic_softc_t *));
static int epic_init_rings __P((epic_softc_t *));
static void epic_free_rings __P((epic_softc_t *));
static void epic_stop_activity __P((epic_softc_t *));
static void epic_start_activity __P((epic_softc_t *));
static void epic_set_rx_mode __P((epic_softc_t *));
static void epic_set_tx_mode __P((epic_softc_t *));
static void epic_set_mc_table __P((epic_softc_t *));
static void epic_set_media_speed __P((epic_softc_t *));
static void epic_init_phy __P((epic_softc_t *));
static void epic_dump_state __P((epic_softc_t *));
static int epic_autoneg __P((epic_softc_t *));
static int epic_read_eeprom __P((epic_softc_t *,u_int16_t));
static void epic_output_eepromw __P((epic_softc_t *, u_int16_t));
static u_int16_t epic_input_eepromw __P((epic_softc_t *));
static u_int8_t epic_eeprom_clock __P((epic_softc_t *,u_int8_t));
static void epic_write_eepromreg __P((epic_softc_t *,u_int8_t));
static u_int8_t epic_read_eepromreg __P((epic_softc_t *));
static u_int16_t epic_read_phy_register __P((epic_softc_t *, u_int16_t));
static void epic_write_phy_register __P((epic_softc_t *, u_int16_t, u_int16_t));
#if !defined(EPIC_NOIFMEDIA)
static int epic_ifmedia_change __P((struct ifnet *));
static void epic_ifmedia_status __P((struct ifnet *, struct ifmediareq *));
#endif
/* -------------------------------------------------------------------------
OS-specific part
------------------------------------------------------------------------- */
#if defined(__OpenBSD__)
/* -----------------------------OpenBSD------------------------------------- */
static int epic_openbsd_probe __P((struct device *,void *,void *));
static void epic_openbsd_attach __P((struct device *, struct device *, void *));
static void epic_shutdown __P((void *));
struct cfattach tx_ca = {
sizeof(epic_softc_t), epic_openbsd_probe, epic_openbsd_attach
};
struct cfdriver tx_cd = {
NULL,"tx",DV_IFNET
};
/* Synopsis: Check if device id corresponds with SMC83C170 id. */
static int
epic_openbsd_probe(
struct device *parent,
void *match,
void *aux )
{
struct pci_attach_args *pa = aux;
if( PCI_VENDOR(pa->pa_id) != SMC_VENDORID )
return 0;
if( PCI_PRODUCT(pa->pa_id) == CHIPID_83C170 )
return 1;
return 0;
}
static void
epic_openbsd_attach(
struct device *parent,
struct device *self,
void *aux )
{
epic_softc_t *sc = (epic_softc_t*)self;
struct pci_attach_args *pa = aux;
pci_chipset_tag_t pc = pa->pa_pc;
pci_intr_handle_t ih;
const char *intrstr = NULL;
struct ifnet *ifp;
bus_space_tag_t iot = pa->pa_iot;
bus_addr_t iobase;
bus_size_t iosize;
int i;
#if !defined(EPIC_NOIFMEDIA)
int tmp;
#endif
if( pci_io_find(pc, pa->pa_tag, PCI_CBIO, &iobase, &iosize)) {
printf(": can't find i/o space\n");
return;
}
if( bus_space_map(iot, iobase, iosize, 0, &sc->sc_sh)) {
printf(": can't map i/o space\n");
return;
}
sc->sc_st = iot;
ifp = &sc->sc_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 = epic_ifioctl;
ifp->if_start = epic_ifstart;
ifp->if_watchdog = epic_ifwatchdog;
/* Do common attach procedure */
if( epic_common_attach(sc) ) return;
/* Map interrupt */
if( pci_intr_map(pc, pa->pa_intrtag, pa->pa_intrpin,
pa->pa_intrline, &ih)) {
printf(": can't map interrupt\n");
return;
}
intrstr = pci_intr_string(pc, ih);
sc->sc_ih = pci_intr_establish(pc, ih, IPL_NET, epic_intr, sc,
self->dv_xname);
if( NULL == sc->sc_ih ) {
printf(": can't establish interrupt");
if( intrstr )printf(" at %s",intrstr);
printf("\n");
return;
}
printf(": %s",intrstr);
/* Display some info */
printf(" address %s",ether_sprintf(sc->sc_macaddr));
/* Read current media config and display it too */
i = PHY_READ_2( sc, DP83840_BMCR );
#if !defined(EPIC_NOIFMEDIA)
tmp = IFM_ETHER;
#endif
if( i & BMCR_AUTONEGOTIATION ){
printf(", Auto-Neg ");
/* To avoid bug in QS6612 read LPAR enstead of BMSR */
i = PHY_READ_2( sc, DP83840_LPAR );
if( i & (ANAR_100_TX|ANAR_100_TX_FD) ) printf("100Mbps");
else printf("10Mbps");
if( i & (ANAR_10_FD|ANAR_100_TX_FD) ) printf(" FD");
#if !defined(EPIC_NOIFMEDIA)
tmp |= IFM_AUTO;
#endif
} else {
#if defined(EPIC_NOIFMEDIA)
ifp->if_flags |= IFF_LINK0;
#endif
if( i & BMCR_100MBPS ) {
printf(", 100Mbps");
#if !defined(EPIC_NOIFMEDIA)
tmp |= IFM_100_TX;
#else
ifp->if_flags |= IFF_LINK2;
#endif
} else {
printf(", 10Mbps");
#if !defined(EPIC_NOIFMEDIA)
tmp |= IFM_10_T;
#endif
}
if( i & BMCR_FULL_DUPLEX ) {
printf(" FD");
#if !defined(EPIC_NOIFMEDIA)
tmp |= IFM_FDX;
#else
ifp->if_flags |= IFF_LINK1;
#endif
}
}
/* Init ifmedia interface */
#if !defined(EPIC_NOIFMEDIA)
ifmedia_init(&sc->ifmedia,0,epic_ifmedia_change,epic_ifmedia_status);
ifmedia_add(&sc->ifmedia,IFM_ETHER|IFM_10_T,0,NULL);
ifmedia_add(&sc->ifmedia,IFM_ETHER|IFM_10_T|IFM_LOOP,0,NULL);
ifmedia_add(&sc->ifmedia,IFM_ETHER|IFM_10_T|IFM_FDX,0,NULL);
ifmedia_add(&sc->ifmedia,IFM_ETHER|IFM_100_TX,0,NULL);
ifmedia_add(&sc->ifmedia,IFM_ETHER|IFM_100_TX|IFM_LOOP,0,NULL);
ifmedia_add(&sc->ifmedia,IFM_ETHER|IFM_100_TX|IFM_FDX,0,NULL);
ifmedia_add(&sc->ifmedia,IFM_ETHER|IFM_AUTO,0,NULL);
ifmedia_add(&sc->ifmedia,IFM_ETHER|IFM_LOOP,0,NULL);
ifmedia_set(&sc->ifmedia, tmp);
#endif
/* Attach os interface and bpf */
if_attach(ifp);
ether_ifattach(ifp);
#if NBPFILTER > 0
bpfattach(&sc->sc_if.if_bpf, ifp, DLT_EN10MB,
sizeof(struct ether_header));
#endif
/* Set shutdown routine to stop DMA process */
shutdownhook_establish(epic_shutdown, sc);
printf("\n");
}
/* Simple call epic_stop() */
static void
epic_shutdown(
void *sc)
{
epic_stop(sc);
}
#else /* __FreeBSD__ */
/* -----------------------------FreeBSD------------------------------------- */
static char* epic_freebsd_probe __P((pcici_t, pcidi_t));
static void epic_freebsd_attach __P((pcici_t, int));
static void epic_shutdown __P((int, void *));
/* Global variables */
static u_long epic_pci_count;
static struct pci_device txdevice = {
"tx",
epic_freebsd_probe,
epic_freebsd_attach,
&epic_pci_count,
NULL };
/* Append this driver to pci drivers list */
DATA_SET ( pcidevice_set, txdevice );
/* Synopsis: Check if device id corresponds with SMC83C170 id. */
static char*
epic_freebsd_probe(
pcici_t config_id,
pcidi_t device_id)
{
if( PCI_VENDORID(device_id) != SMC_VENDORID )
return NULL;
if( PCI_CHIPID(device_id) == CHIPID_83C170 )
return "SMC 83c170";
return NULL;
}
/*
* Do FreeBSD-specific attach routine, like map registers, alloc softc
* structure and etc.
*/
static void
epic_freebsd_attach(
pcici_t config_id,
int unit)
{
struct ifnet *ifp;
epic_softc_t *sc;
#if defined(EPIC_USEIOSPACE)
u_int32_t iobase;
#else
caddr_t pmembase;
#endif
int i,k,s,tmp;
u_int32_t pool;
printf("tx%d",unit);
/* Allocate memory for softc, hardware descriptors and frag lists */
sc = (epic_softc_t *) malloc( sizeof(epic_softc_t), M_DEVBUF, M_NOWAIT);
if (sc == NULL) return;
/* Preinitialize softc structure */
bzero(sc, sizeof(epic_softc_t));
sc->unit = unit;
/* Fill ifnet structure */
ifp = &sc->sc_if;
ifp->if_unit = unit;
ifp->if_name = "tx";
ifp->if_softc = sc;
ifp->if_flags = IFF_BROADCAST|IFF_SIMPLEX|IFF_MULTICAST;
ifp->if_ioctl = epic_ifioctl;
ifp->if_start = epic_ifstart;
ifp->if_watchdog = epic_ifwatchdog;
ifp->if_init = (if_init_f_t*)epic_init;
ifp->if_timer = 0;
ifp->if_output = ether_output;
/* Get iobase or membase */
#if defined(EPIC_USEIOSPACE)
if (!pci_map_port(config_id, PCI_CBIO,(u_short *) &(sc->iobase))) {
printf(": cannot map port\n");
free(sc, M_DEVBUF);
return;
}
#else
if (!pci_map_mem(config_id, PCI_CBMA,(vm_offset_t *) &(sc->csr),(vm_offset_t *) &pmembase)) {
printf(": cannot map memory\n");
free(sc, M_DEVBUF);
return;
}
#endif
if( epic_common_attach(sc) ) return;
/* Display ethernet address ,... */
printf(": address %02x:%02x:%02x:%02x:%02x:%02x,",
sc->sc_macaddr[0],sc->sc_macaddr[1],sc->sc_macaddr[2],
sc->sc_macaddr[3],sc->sc_macaddr[4],sc->sc_macaddr[5]);
/* board type and ... */
printf(" type ");
for(i=0x2c;i<0x32;i++) {
tmp = epic_read_eeprom( sc, i );
if( ' ' == (u_int8_t)tmp ) break;
printf("%c",(u_int8_t)tmp);
tmp >>= 8;
if( ' ' == (u_int8_t)tmp ) break;
printf("%c",(u_int8_t)tmp);
}
/* Read current media config and display it too */
i = PHY_READ_2( sc, DP83840_BMCR );
#if !defined(EPIC_NOIFMEDIA)
tmp = IFM_ETHER;
#endif
if( i & BMCR_AUTONEGOTIATION ){
printf(", Auto-Neg ");
/* To avoid bug in QS6612 read LPAR enstead of BMSR */
i = PHY_READ_2( sc, DP83840_LPAR );
if( i & (ANAR_100_TX|ANAR_100_TX_FD) ) printf("100Mbps ");
else printf("10Mbps ");
if( i & (ANAR_10_FD|ANAR_100_TX_FD) ) printf("FD");
#if !defined(EPIC_NOIFMEDIA)
tmp |= IFM_AUTO;
#endif
} else {
#if defined(EPIC_NOIFMEDIA)
ifp->if_flags |= IFF_LINK0;
#endif
if( i & BMCR_100MBPS ) {
printf(", 100Mbps ");
#if !defined(EPIC_NOIFMEDIA)
tmp |= IFM_100_TX;
#else
ifp->if_flags |= IFF_LINK2;
#endif
} else {
printf(", 10Mbps ");
#if !defined(EPIC_NOIFMEDIA)
tmp |= IFM_10_T;
#endif
}
if( i & BMCR_FULL_DUPLEX ) {
printf("FD");
#if !defined(EPIC_NOIFMEDIA)
tmp |= IFM_FDX;
#else
ifp->if_flags |= IFF_LINK1;
#endif
}
}
/* Init ifmedia interface */
#if !defined(EPIC_NOIFMEDIA)
ifmedia_init(&sc->ifmedia,0,epic_ifmedia_change,epic_ifmedia_status);
ifmedia_add(&sc->ifmedia,IFM_ETHER|IFM_10_T,0,NULL);
ifmedia_add(&sc->ifmedia,IFM_ETHER|IFM_10_T|IFM_LOOP,0,NULL);
ifmedia_add(&sc->ifmedia,IFM_ETHER|IFM_10_T|IFM_FDX,0,NULL);
ifmedia_add(&sc->ifmedia,IFM_ETHER|IFM_100_TX,0,NULL);
ifmedia_add(&sc->ifmedia,IFM_ETHER|IFM_100_TX|IFM_LOOP,0,NULL);
ifmedia_add(&sc->ifmedia,IFM_ETHER|IFM_100_TX|IFM_FDX,0,NULL);
ifmedia_add(&sc->ifmedia,IFM_ETHER|IFM_AUTO,0,NULL);
ifmedia_add(&sc->ifmedia,IFM_ETHER|IFM_LOOP,0,NULL);
ifmedia_set(&sc->ifmedia, tmp);
#endif
s = splimp();
/* Map interrupt */
if( !pci_map_int(config_id, epic_intr, (void*)sc, &net_imask) ) {
printf(": couldn't map interrupt\n");
free(sc, M_DEVBUF);
return;
}
/* Set shut down routine to stop DMA processes on reboot */
at_shutdown(epic_shutdown, sc, SHUTDOWN_POST_SYNC);
/* Attach to if manager */
if_attach(ifp);
ether_ifattach(ifp);
#if NBPFILTER > 0
bpfattach(ifp,DLT_EN10MB, sizeof(struct ether_header));
#endif
splx(s);
printf("\n");
return;
}
static void
epic_shutdown(
int howto,
void *sc)
{
epic_stop(sc);
}
#endif /* __OpenBSD__ */
/* ------------------------------------------------------------------------
OS-independing part
------------------------------------------------------------------------ */
/*
* This is if_ioctl handler.
*/
static int
epic_ifioctl __P((
register struct ifnet * ifp,
EPIC_IFIOCTL_CMD_TYPE command,
caddr_t data))
{
epic_softc_t *sc = ifp->if_softc;
int x, error = 0;
x = splimp();
switch (command) {
#if defined(__FreeBSD__)
case SIOCSIFADDR:
case SIOCGIFADDR:
case SIOCSIFMTU:
error = ether_ioctl(ifp, command, data);
break;
#else /* __OpenBSD__ */
case SIOCSIFADDR: {
struct ifaddr *ifa = (struct ifaddr *)data;
ifp->if_flags |= IFF_UP;
switch(ifa->ifa_addr->sa_family) {
#if INET
case AF_INET:
epic_stop(sc);
epic_init(sc);
arp_ifinit(&sc->arpcom,ifa);
break;
#endif /* __FreeBSD__ */
#if 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);
epic_stop(sc);
epic_init(sc);
break;
}
#endif
default:
epic_stop(sc);
epic_init(sc);
break;
}
}
#endif
case SIOCSIFFLAGS:
/*
* If the interface is marked up and stopped, then start it.
* If it is marked down and running, then stop it.
*/
if (ifp->if_flags & IFF_UP) {
if ((ifp->if_flags & IFF_RUNNING) == 0) {
epic_init(sc);
break;
}
} else {
if (ifp->if_flags & IFF_RUNNING) {
epic_stop(sc);
break;
}
}
/* Handle IFF_PROMISC flag */
epic_set_rx_mode(sc);
#if defined(EPIC_NOIFMEDIA)
/* Handle IFF_LINKx flags */
epic_set_media_speed(sc);
#endif
break;
case SIOCADDMULTI:
case SIOCDELMULTI:
/* Update out multicast list */
#if defined(__FreeBSD__) && __FreeBSD_version >= 300000
epic_set_mc_table(sc);
error = 0;
#else
error = (command == SIOCADDMULTI) ?
ether_addmulti((struct ifreq *)data, &sc->arpcom) :
ether_delmulti((struct ifreq *)data, &sc->arpcom);
if (error == ENETRESET) {
epic_set_mc_table(sc);
error = 0;
}
#endif
break;
#if !defined(EPIC_NOIFMEDIA)
case SIOCSIFMEDIA:
case SIOCGIFMEDIA:
error = ifmedia_ioctl(ifp, (struct ifreq *)data,
&sc->ifmedia, command);
break;
#endif
default:
error = EINVAL;
}
splx(x);
return error;
}
/*
* OS-independed part of attach process. allocate memory for descriptors
* and frag lists, wake up chip, read MAC address and PHY identyfier.
* Return -1 on failure.
*/
static int
epic_common_attach(
epic_softc_t *sc)
{
int i;
caddr_t pool;
i = sizeof(struct epic_frag_list)*TX_RING_SIZE +
sizeof(struct epic_rx_desc)*RX_RING_SIZE +
sizeof(struct epic_tx_desc)*TX_RING_SIZE + PAGE_SIZE,
sc->pool = (epic_softc_t *) malloc( i, M_DEVBUF, M_NOWAIT);
if (sc->pool == NULL) {
printf(": can't allocate memory for buffers\n");
return -1;
}
bzero(sc->pool, i);
/* Align pool on PAGE_SIZE */
pool = (caddr_t)sc->pool;
pool = (caddr_t)((u_int32_t)(pool + PAGE_SIZE - 1) & ~(PAGE_SIZE - 1));
/* Distribute memory */
sc->tx_flist = (void *)pool;
pool += sizeof(struct epic_frag_list)*TX_RING_SIZE;
sc->rx_desc = (void *)pool;
pool += sizeof(struct epic_rx_desc)*RX_RING_SIZE;
sc->tx_desc = (void *)pool;
/* Bring the chip out of low-power mode. */
CSR_WRITE_4( sc, GENCTL, 0x0000 );
/* Magic?! If we don't set this bit the MII interface won't work. */
CSR_WRITE_4( sc, TEST1, 0x0008 );
/* Read mac address from EEPROM */
for (i = 0; i < ETHER_ADDR_LEN / sizeof(u_int16_t); i++)
((u_int16_t *)sc->sc_macaddr)[i] = epic_read_eeprom(sc,i);
/* Identify PHY */
sc->phyid = PHY_READ_2(sc, DP83840_PHYIDR1 )<<6;
sc->phyid|= (PHY_READ_2( sc, DP83840_PHYIDR2 )>>10)&0x3F;
if( QS6612_OUI != sc->phyid )
printf(": WARNING! PHY unknown (0x%x)",sc->phyid);
sc->tx_threshold = TRANSMIT_THRESHOLD;
sc->txcon = TXCON_DEFAULT;
return 0;
}
/*
* This is if_start handler. It takes mbufs from if_snd queue
* and quque them for transmit, one by one, until TX ring become full
* or quque become empty.
*/
static void
epic_ifstart(struct ifnet * const ifp){
epic_softc_t *sc = ifp->if_softc;
struct epic_tx_buffer *buf;
struct epic_tx_desc *desc;
struct epic_frag_list *flist;
struct mbuf *m0;
register struct mbuf *m;
register int i;
/* If no link is established, simply free all mbufs in queue */
PHY_READ_2( sc, DP83840_BMSR );
if( !(BMSR_LINK_STATUS & PHY_READ_2( sc, DP83840_BMSR )) ){
IF_DEQUEUE( &ifp->if_snd, m0 );
while( m0 ) {
m_freem(m0);
IF_DEQUEUE( &ifp->if_snd, m0 );
}
return;
}
/* Link is OK, queue packets to NIC */
while( sc->pending_txs < TX_RING_SIZE ){
buf = sc->tx_buffer + sc->cur_tx;
desc = sc->tx_desc + sc->cur_tx;
flist = sc->tx_flist + sc->cur_tx;
/* Get next packet to send */
IF_DEQUEUE( &ifp->if_snd, m0 );
/* If nothing to send, return */
if( NULL == m0 ) return;
/* If descriptor is busy, set IFF_OACTIVE and exit */
if( desc->status & 0x8000 ) {
dprintf((EPIC_FORMAT ": desc is busy in ifstart, up and down interface please\n",EPIC_ARGS(sc)));
break;
}
if( buf->mbuf ) {
dprintf((EPIC_FORMAT ": mbuf not freed in ifstart, up and down interface plase\n",EPIC_ARGS(sc)));
break;
}
/* Fill fragments list */
for( m=m0, i=0;
(NULL != m) && (i < EPIC_MAX_FRAGS);
m = m->m_next, i++ ) {
flist->frag[i].fraglen = m->m_len;
flist->frag[i].fragaddr = vtophys( mtod(m, caddr_t) );
}
flist->numfrags = i;
/* If packet was more than EPIC_MAX_FRAGS parts, */
/* recopy packet to new allocated mbuf cluster */
if( NULL != m ){
EPIC_MGETCLUSTER(m);
if( NULL == m ){
printf(EPIC_FORMAT ": cannot allocate mbuf cluster\n",EPIC_ARGS(sc));
m_freem(m0);
ifp->if_oerrors++;
continue;
}
m_copydata( m0, 0, m0->m_pkthdr.len, mtod(m,caddr_t) );
flist->frag[0].fraglen =
m->m_pkthdr.len = m->m_len = m0->m_pkthdr.len;
m->m_pkthdr.rcvif = ifp;
flist->numfrags = 1;
flist->frag[0].fragaddr = vtophys( mtod(m, caddr_t) );
m_freem(m0);
m0 = m;
}
buf->mbuf = m0;
sc->pending_txs++;
sc->cur_tx = ( sc->cur_tx + 1 ) & TX_RING_MASK;
desc->control = 0x01;
desc->txlength =
max(m0->m_pkthdr.len,ETHER_MIN_LEN-ETHER_CRC_LEN);
desc->status = 0x8000;
CSR_WRITE_4( sc, COMMAND, COMMAND_TXQUEUED );
/* Set watchdog timer */
ifp->if_timer = 8;
#if NBPFILTER > 0
if( ifp->if_bpf )
#if defined(__FreeBSD__)
bpf_mtap( ifp, m0 );
#else /* __OpenBSD__ */
bpf_mtap( ifp->if_bpf, m0 );
#endif /* __FreeBSD__ */
#endif
}
ifp->if_flags |= IFF_OACTIVE;
return;
}
/*
*
* splimp() invoked before epic_intr_normal()
*/
static __inline void
epic_rx_done __P((
epic_softc_t *sc ))
{
u_int16_t len;
struct epic_rx_buffer *buf;
struct epic_rx_desc *desc;
struct mbuf *m;
struct ether_header *eh;
while( !(sc->rx_desc[sc->cur_rx].status & 0x8000) ) {
buf = sc->rx_buffer + sc->cur_rx;
desc = sc->rx_desc + sc->cur_rx;
/* Switch to next descriptor */
sc->cur_rx = (sc->cur_rx+1) & RX_RING_MASK;
/* Check for errors, this should happend */
/* only if SAVE_ERRORED_PACKETS is set, */
/* normaly rx errors generate RXE interrupt */
if( !(desc->status & 1) ) {
dprintf((EPIC_FORMAT ": Rx error status: 0x%x\n",EPIC_ARGS(sc),desc->status));
sc->sc_if.if_ierrors++;
desc->status = 0x8000;
continue;
}
/* Save packet length and mbuf contained packet */
len = desc->rxlength - ETHER_CRC_LEN;
m = buf->mbuf;
/* Try to get mbuf cluster */
EPIC_MGETCLUSTER( buf->mbuf );
if( NULL == buf->mbuf ) {
printf(EPIC_FORMAT ": cannot allocate mbuf cluster\n",EPIC_ARGS(sc));
buf->mbuf = m;
desc->status = 0x8000;
sc->sc_if.if_ierrors++;
continue;
}
/* Point to new mbuf, and give descriptor to chip */
desc->bufaddr = vtophys( mtod( buf->mbuf, caddr_t ) );
desc->status = 0x8000;
/* First mbuf in packet holds the ethernet and packet headers */
eh = mtod( m, struct ether_header * );
m->m_pkthdr.rcvif = &(sc->sc_if);
m->m_pkthdr.len = m->m_len = len;
#if NBPFILTER > 0
/* Give mbuf to BPFILTER */
if( sc->sc_if.if_bpf )
#if defined(__FreeBSD__)
bpf_mtap( &sc->sc_if, m );
#else /* __OpenBSD__ */
bpf_mtap( sc->sc_if.if_bpf, m );
#endif /* __FreeBSD__ */
/* Accept only our packets, broadcasts and multicasts */
if( (eh->ether_dhost[0] & 1) == 0 &&
bcmp(eh->ether_dhost,sc->sc_macaddr,ETHER_ADDR_LEN)){
m_freem(m);
continue;
}
#endif
/* Second mbuf holds packet ifself */
m->m_pkthdr.len = m->m_len = len - sizeof(struct ether_header);
m->m_data += sizeof( struct ether_header );
/* Give mbuf to OS */
ether_input(&sc->sc_if, eh, m);
/* Successfuly received frame */
sc->sc_if.if_ipackets++;
}
return;
}
/*
* Synopsis: Do last phase of transmission. I.e. if desc is
* transmitted, decrease pending_txs counter, free mbuf contained
* packet, switch to next descriptor and repeat until no packets
* are pending or descriptro is not transmitted yet.
*/
static __inline void
epic_tx_done __P((
register epic_softc_t *sc ))
{
struct epic_tx_buffer *buf;
struct epic_tx_desc *desc;
u_int16_t status;
while( sc->pending_txs > 0 ){
buf = sc->tx_buffer + sc->dirty_tx;
desc = sc->tx_desc + sc->dirty_tx;
status = desc->status;
/* If packet is not transmitted, thou followed */
/* packets are not transmitted too */
if( status & 0x8000 ) break;
/* Packet is transmitted. Switch to next and */
/* free mbuf */
sc->pending_txs--;
sc->dirty_tx = (sc->dirty_tx + 1) & TX_RING_MASK;
m_freem( buf->mbuf );
buf->mbuf = NULL;
/* Check for errors and collisions */
if( status & 0x0001 ) sc->sc_if.if_opackets++;
else sc->sc_if.if_oerrors++;
sc->sc_if.if_collisions += (status >> 8) & 0x1F;
#if defined(EPIC_DEBUG)
if( (status & 0x1001) == 0x1001 )
dprintf((EPIC_FORMAT ": frame not transmitted due collisions\n",EPIC_ARGS(sc)));
#endif
}
if( sc->pending_txs < TX_RING_SIZE )
sc->sc_if.if_flags &= ~IFF_OACTIVE;
}
/*
* Interrupt function
*
* splimp() assumed to be done
*/
static EPIC_INTR_RET_TYPE
epic_intr (
void *arg)
{
epic_softc_t * sc = (epic_softc_t *) arg;
int status,i=4;
#if defined(__OpenBSD__)
int claimed = 0;
#endif
while( i-- && ((status = CSR_READ_4(sc, INTSTAT)) & INTSTAT_INT_ACTV) ){
#if defined(__OpenBSD__)
claimed = 1;
#endif
CSR_WRITE_4( sc, INTSTAT, status );
if( status & (INTSTAT_RQE|INTSTAT_RCC|INTSTAT_OVW) ) {
epic_rx_done( sc );
if( status & (INTSTAT_RQE|INTSTAT_OVW) ){
#if defined(EPIC_DEBUG)
if( status & INTSTAT_OVW )
printf(EPIC_FORMAT ": RX buffer overflow\n",EPIC_ARGS(sc));
if( status & INTSTAT_RQE )
printf(EPIC_FORMAT ": RX FIFO overflow\n",EPIC_ARGS(sc));
if( sc->sc_if.if_flags & IFF_DEBUG )
epic_dump_state(sc);
#endif
if( !(CSR_READ_4( sc, COMMAND ) & COMMAND_RXQUEUED) )
CSR_WRITE_4( sc, COMMAND, COMMAND_RXQUEUED );
sc->sc_if.if_ierrors++;
}
}
if( status & (INTSTAT_TXC|INTSTAT_TCC|INTSTAT_TQE) ) {
epic_tx_done( sc );
if(!(sc->sc_if.if_flags & IFF_OACTIVE) &&
sc->sc_if.if_snd.ifq_head )
epic_ifstart( &sc->sc_if );
}
if( (status & INTSTAT_GP2) && (QS6612_OUI == sc->phyid) ) {
u_int32_t phystatus = PHY_READ_2( sc, QS6612_INTSTAT );
if( phystatus & INTSTAT_AN_COMPLETE ) {
u_int32_t bmcr;
if( epic_autoneg(sc) == EPIC_FULL_DUPLEX ) {
bmcr = BMCR_FULL_DUPLEX | PHY_READ_2( sc, DP83840_BMCR );
sc->txcon |= TXCON_FULL_DUPLEX;
CSR_WRITE_4( sc, TXCON, sc->txcon );
} else {
/* Default to half-duplex */
bmcr = ~BMCR_FULL_DUPLEX & PHY_READ_2( sc, DP83840_BMCR );
sc->txcon &= ~TXCON_FULL_DUPLEX;
CSR_WRITE_4( sc, TXCON, sc->txcon );
}
/* There is apparently QS6612 chip bug: */
/* BMCR_FULL_DUPLEX flag is not updated by */
/* autonegotiation process, so update it by hands */
/* so we can rely on it in epic_ifmedia_status() */
PHY_WRITE_2( sc, DP83840_BMCR, bmcr );
}
PHY_READ_2(sc, DP83840_BMSR);
if( !(PHY_READ_2(sc, DP83840_BMSR) & BMSR_LINK_STATUS) ) {
dprintf((EPIC_FORMAT ": WARNING! link down\n",EPIC_ARGS(sc)));
sc->flags |= EPIC_LINK_DOWN;
} else {
dprintf((EPIC_FORMAT ": link up\n",EPIC_ARGS(sc)));
sc->flags &= ~EPIC_LINK_DOWN;
}
/* We should clear GP2 int again after we clear it on PHY */
CSR_WRITE_4( sc, INTSTAT, INTSTAT_GP2 );
}
/* Check for errors */
if( status & (INTSTAT_FATAL|INTSTAT_PMA|INTSTAT_PTA|
INTSTAT_APE|INTSTAT_DPE|INTSTAT_TXU|INTSTAT_RXE) ){
if( status & (INTSTAT_FATAL|INTSTAT_PMA|INTSTAT_PTA|
INTSTAT_APE|INTSTAT_DPE) ){
printf(EPIC_FORMAT ": PCI fatal error occured (%s%s%s%s)\n",
EPIC_ARGS(sc),
(status&INTSTAT_PMA)?"PMA":"",
(status&INTSTAT_PTA)?" PTA":"",
(status&INTSTAT_APE)?" APE":"",
(status&INTSTAT_DPE)?" DPE":""
);
epic_dump_state(sc);
epic_stop(sc);
epic_init(sc);
break;
}
if (status & INTSTAT_RXE) {
dprintf((EPIC_FORMAT ": CRC/Alignment error\n",EPIC_ARGS(sc)));
sc->sc_if.if_ierrors++;
}
/* Tx FIFO underflow. Increase tx threshold, */
/* if it grown above 2048, disable EARLY_TX */
if (status & INTSTAT_TXU) {
if( sc->tx_threshold > 0x800 ) {
sc->txcon &= ~TXCON_EARLY_TRANSMIT_ENABLE;
dprintf((EPIC_FORMAT ": TX underrun error, early tx disabled\n",EPIC_ARGS(sc)));
} else {
sc->tx_threshold += 0x40;
dprintf((EPIC_FORMAT ": TX underrun error, tx threshold increased to %d\n",EPIC_ARGS(sc),sc->tx_threshold));
}
epic_stop_activity(sc);
epic_set_tx_mode(sc);
epic_start_activity(sc);
sc->sc_if.if_oerrors++;
/* Restart the transmit process. */
/* CSR_WRITE_4(sc, COMMAND, COMMAND_TXUGO|COMMAND_TXQUEUED); */
}
}
}
/* If no packets are pending, thus no timeouts */
if( sc->pending_txs == 0 ) sc->sc_if.if_timer = 0;
#if defined(__OpenBSD__)
return claimed;
#endif
}
/*
* Synopsis: This one is called if packets wasn't transmitted
* during timeout. Try to deallocate transmitted packets, and
* if success continue to work.
*
* splimp() invoked here
*/
static void
epic_ifwatchdog __P((
struct ifnet *ifp))
{
epic_softc_t *sc = ifp->if_softc;
int x;
x = splimp();
printf(EPIC_FORMAT ": device timeout %d packets, ",
EPIC_ARGS(sc),sc->pending_txs);
/* Try to finish queued packets */
epic_tx_done( sc );
/* If not successful */
if( sc->pending_txs > 0 ){
#if defined(EPIC_DEBUG)
if( ifp->if_flags & IFF_DEBUG ) epic_dump_state(sc);
#endif
ifp->if_oerrors+=sc->pending_txs;
/* Reinitialize board */
printf("reinitialization\n");
epic_stop(sc);
epic_init(sc);
} else
printf("seems we can continue normaly\n");
/* Start output */
if( ifp->if_snd.ifq_head ) epic_ifstart( ifp );
splx(x);
}
#if defined(SIOCSIFMEDIA) && !defined(EPIC_NOIFMEDIA)
static int
epic_ifmedia_change __P((
struct ifnet * ifp))
{
epic_softc_t *sc = (epic_softc_t *)(ifp->if_softc);
if (IFM_TYPE(sc->ifmedia.ifm_media) != IFM_ETHER)
return (EINVAL);
epic_set_media_speed(sc);
return 0;
}
static void
epic_ifmedia_status __P((
struct ifnet * ifp,
struct ifmediareq *ifmr))
{
epic_softc_t *sc = ifp->if_softc;
u_int32_t bmcr;
u_int32_t bmsr;
bmcr = PHY_READ_2( sc, DP83840_BMCR );
PHY_READ_2( sc, DP83840_BMSR );
bmsr = PHY_READ_2( sc, DP83840_BMSR );
ifmr->ifm_active = IFM_ETHER;
ifmr->ifm_status = IFM_AVALID;
if( !(bmsr & BMSR_LINK_STATUS) ) {
ifmr->ifm_active |=
(bmcr&BMCR_AUTONEGOTIATION)?IFM_AUTO:IFM_NONE;
return;
}
ifmr->ifm_status |= IFM_ACTIVE;
ifmr->ifm_active |= (bmcr&BMCR_100MBPS)?IFM_100_TX:IFM_10_T;
ifmr->ifm_active |= (bmcr&BMCR_FULL_DUPLEX)?IFM_FDX:0;
ifmr->ifm_active |= ((CSR_READ_4(sc,TXCON)&TXCON_LOOPBACK_MODE)==TXCON_LOOPBACK_MODE_INT)?IFM_LOOP:0;
}
#endif
/*
* Reset chip, PHY, allocate rings
*
* splimp() invoked here
*/
static int
epic_init __P((
epic_softc_t * sc))
{
struct ifnet *ifp = &sc->sc_if;
int s;
s = splimp();
/* Soft reset the chip */
CSR_WRITE_4( sc, GENCTL, GENCTL_SOFT_RESET );
/* Reset takes 15 pci ticks which depends on processor speed */
DELAY(1);
/* Wake up */
CSR_WRITE_4( sc, GENCTL, 0 );
/* ?????? */
CSR_WRITE_4( sc, TEST1, 0x0008);
/* Initialize rings */
if( epic_init_rings( sc ) ) {
printf(EPIC_FORMAT ": failed to init rings\n",EPIC_ARGS(sc));
splx(s);
return -1;
}
/* Give rings to EPIC */
CSR_WRITE_4( sc, PRCDAR, vtophys( sc->rx_desc ) );
CSR_WRITE_4( sc, PTCDAR, vtophys( sc->tx_desc ) );
/* Put node address to EPIC */
CSR_WRITE_4( sc, LAN0, ((u_int16_t *)sc->sc_macaddr)[0] );
CSR_WRITE_4( sc, LAN1, ((u_int16_t *)sc->sc_macaddr)[1] );
CSR_WRITE_4( sc, LAN2, ((u_int16_t *)sc->sc_macaddr)[2] );
/* Set tx mode, includeing transmit threshold */
epic_set_tx_mode(sc);
/* Compute and set RXCON. */
epic_set_rx_mode( sc );
/* Set media speed mode */
epic_init_phy( sc );
epic_set_media_speed( sc );
/* Set multicast table */
epic_set_mc_table( sc );
/* Enable interrupts by setting the interrupt mask. */
CSR_WRITE_4( sc, INTMASK,
INTSTAT_RCC | INTSTAT_RQE | INTSTAT_OVW | INTSTAT_RXE |
INTSTAT_TXC | INTSTAT_TCC | INTSTAT_TQE | INTSTAT_TXU |
INTSTAT_FATAL |
((QS6612_OUI == sc->phyid)?INTSTAT_GP2:0) );
/* Enable interrupts, set for PCI read multiple and etc */
CSR_WRITE_4( sc, GENCTL,
GENCTL_ENABLE_INTERRUPT | GENCTL_MEMORY_READ_MULTIPLE |
GENCTL_ONECOPY | GENCTL_RECEIVE_FIFO_THRESHOLD64 );
/* Mark interface running ... */
if( ifp->if_flags & IFF_UP ) ifp->if_flags |= IFF_RUNNING;
else ifp->if_flags &= ~IFF_RUNNING;
/* ... and free */
ifp->if_flags &= ~IFF_OACTIVE;
/* Start Rx process */
epic_start_activity(sc);
splx(s);
return 0;
}
/*
* Synopsis: calculate and set Rx mode
*/
static void
epic_set_rx_mode(
epic_softc_t * sc)
{
u_int32_t flags = sc->sc_if.if_flags;
u_int32_t rxcon = RXCON_DEFAULT | RXCON_RECEIVE_MULTICAST_FRAMES | RXCON_RECEIVE_BROADCAST_FRAMES;
rxcon |= (flags & IFF_PROMISC)?RXCON_PROMISCUOUS_MODE:0;
CSR_WRITE_4( sc, RXCON, rxcon );
return;
}
/*
* Synopsis: Reset PHY and do PHY-special initialization:
*/
static void
epic_init_phy __P((
epic_softc_t * sc))
{
u_int32_t i;
/* Reset PHY */
PHY_WRITE_2( sc, DP83840_BMCR, BMCR_RESET );
for(i=0;i<0x100000;i++)
if( !(PHY_READ_2( sc, DP83840_BMCR ) & BMCR_RESET) ) break;
if( PHY_READ_2( sc, DP83840_BMCR ) & BMCR_RESET )
printf(EPIC_FORMAT ": WARNING! cannot reset PHY\n",EPIC_ARGS(sc));
switch( sc->phyid ){
case QS6612_OUI:
/* Init QS6612 and EPIC to generate interrupt when AN complete*/
CSR_WRITE_4( sc, NVCTL, NVCTL_GP1_OUTPUT_ENABLE );
PHY_READ_2( sc, QS6612_INTSTAT );
PHY_WRITE_2( sc, QS6612_INTMASK, INTMASK_THUNDERLAN | INTSTAT_AN_COMPLETE | INTSTAT_LINK_STATUS );
/* Enable QS6612 extended cable length capabilites */
PHY_WRITE_2( sc, QS6612_MCTL, PHY_READ_2( sc,QS6612_MCTL ) | MCTL_BTEXT );
break;
default:
break;
}
}
/*
* Synopsis: Set PHY to media type specified by IFF_LINK* flags or
* ifmedia structure.
*/
static void
epic_set_media_speed __P((
epic_softc_t * sc))
{
u_int16_t media;
#if !defined(EPIC_NOIFMEDIA)
u_int32_t tgtmedia = sc->ifmedia.ifm_cur->ifm_media;
if( IFM_SUBTYPE(tgtmedia) != IFM_AUTO ){
/* Set mode */
media = (IFM_SUBTYPE(tgtmedia)==IFM_100_TX) ? BMCR_100MBPS : 0;
media|= (tgtmedia&IFM_FDX) ? BMCR_FULL_DUPLEX : 0;
sc->sc_if.if_baudrate =
(IFM_SUBTYPE(tgtmedia)==IFM_100_TX)?100000000:10000000;
PHY_WRITE_2( sc, DP83840_BMCR, media );
if( tgtmedia & IFM_FDX ) sc->txcon |= TXCON_FULL_DUPLEX;
else sc->txcon &= ~TXCON_FULL_DUPLEX;
if( tgtmedia & IFM_LOOP ) sc->txcon |= TXCON_LOOPBACK_MODE_INT;
else sc->txcon &= ~TXCON_LOOPBACK_MODE_INT;
CSR_WRITE_4( sc, TXCON, sc->txcon );
}
#else /* EPIC_NOIFMEDIA */
struct ifnet *ifp = &sc->sc_if;
if( ifp->if_flags & IFF_LINK0 ) {
/* Set mode */
media = (ifp->if_flags & IFF_LINK2) ? BMCR_100MBPS : 0;
media|= (ifp->if_flags & IFF_LINK1) ? BMCR_FULL_DUPLEX : 0;
sc->sc_if.if_baudrate =
(ifp->if_flags & IFF_LINK2)?100000000:10000000;
PHY_WRITE_2( sc, DP83840_BMCR, media );
if( ifp->if_flags & IFF_LINK2 ) sc->txcon |= TXCON_FULL_DUPLEX;
else sc->txcon &= ~TXCON_FULL_DUPLEX;
CSR_WRITE_4( sc, TXCON, sc->txcon );
}
#endif /* !EPIC_NOIFMEDIA */
else {
sc->sc_if.if_baudrate = 100000000;
sc->txcon &= ~TXCON_FULL_DUPLEX;
CSR_WRITE_4(sc, TXCON, sc->txcon);
/* Set and restart autoneg */
PHY_WRITE_2( sc, DP83840_BMCR,
BMCR_AUTONEGOTIATION | BMCR_RESTART_AUTONEG );
/* If it is not QS6612 PHY, try to get result of autoneg. */
if( QS6612_OUI != sc->phyid ) {
/* Wait 3 seconds for the autoneg to finish
* This is the recommended time from the DP83840A data
* sheet Section 7.1
*/
DELAY(3000000);
if( epic_autoneg(sc) == EPIC_FULL_DUPLEX ) {
sc->txcon |= TXCON_FULL_DUPLEX;
CSR_WRITE_4(sc, TXCON, sc->txcon);
}
}
/* Else it will be done when GP2 int occured */
}
return;
}
/*
* This functions get results of the autoneg processes of the phy
* It implements the workaround that is described in section 7.2 & 7.3 of the
* DP83840A data sheet
* http://www.national.com/ds/DP/DP83840A.pdf
*/
static int
epic_autoneg(
epic_softc_t * sc)
{
u_int16_t media;
u_int16_t i;
/* BMSR must be read twice to update the link status bit
* since that bit is a latch bit
*/
PHY_READ_2( sc, DP83840_BMSR);
i = PHY_READ_2( sc, DP83840_BMSR);
if ((i & BMSR_LINK_STATUS) && (i & BMSR_AUTONEG_COMPLETE)){
i = PHY_READ_2( sc, DP83840_LPAR );
if ( i & (ANAR_100_TX_FD|ANAR_10_FD) )
return EPIC_FULL_DUPLEX;
else
return EPIC_HALF_DUPLEX;
} else {
/*Auto-negotiation or link status is not 1
Thus the auto-negotiation failed and one
must take other means to fix it.
*/
/* ANER must be read twice to get the correct reading for the
* Multiple link fault bit -- it is a latched bit
*/
PHY_READ_2( sc, DP83840_ANER );
i = PHY_READ_2( sc, DP83840_ANER );
if ( i & ANER_MULTIPLE_LINK_FAULT ) {
/* it can be forced to 100Mb/s Half-Duplex */
media = PHY_READ_2( sc, DP83840_BMCR );
media &= ~(BMCR_AUTONEGOTIATION | BMCR_FULL_DUPLEX);
media |= BMCR_100MBPS;
PHY_WRITE_2( sc, DP83840_BMCR, media );
/* read BMSR again to determine link status */
PHY_READ_2( sc, DP83840_BMSR );
i=PHY_READ_2( sc, DP83840_BMSR );
if (i & BMSR_LINK_STATUS){
/* port is linked to the non Auto-Negotiation
* 100Mbs partner.
*/
return EPIC_HALF_DUPLEX;
}
else {
media = PHY_READ_2( sc, DP83840_BMCR);
media &= ~(BMCR_AUTONEGOTIATION | BMCR_FULL_DUPLEX | BMCR_100MBPS);
PHY_WRITE_2( sc, DP83840_BMCR, media);
PHY_READ_2( sc, DP83840_BMSR );
i = PHY_READ_2( sc, DP83840_BMSR );
if (i & BMSR_LINK_STATUS) {
/*port is linked to the non
* Auto-Negotiation10Mbs partner
*/
return EPIC_HALF_DUPLEX;
}
}
}
/* If we get here we are most likely not connected
* so lets default it to half duplex
*/
return EPIC_HALF_DUPLEX;
}
}
/*
*/
static void
epic_set_tx_mode (
epic_softc_t *sc )
{
if( sc->txcon & TXCON_EARLY_TRANSMIT_ENABLE )
CSR_WRITE_4( sc, ETXTHR, sc->tx_threshold );
CSR_WRITE_4( sc, TXCON, sc->txcon );
}
/*
* Synopsis: This function should update multicast hash table.
* I suppose there is a bug in chips MC filter so this function
* only set it to receive all MC packets. The second problem is
* that we should wait for TX and RX processes to stop before
* reprogramming MC filter. The epic_stop_activity() and
* epic_start_activity() should help to do this.
*/
static void
epic_set_mc_table (
epic_softc_t * sc)
{
struct ifnet *ifp = &sc->sc_if;
if( ifp->if_flags & IFF_MULTICAST ){
CSR_WRITE_4( sc, MC0, 0xFFFF );
CSR_WRITE_4( sc, MC1, 0xFFFF );
CSR_WRITE_4( sc, MC2, 0xFFFF );
CSR_WRITE_4( sc, MC3, 0xFFFF );
}
return;
}
/*
* Synopsis: Start receive process and transmit, if need
*/
static void
epic_start_activity __P((
epic_softc_t * sc))
{
/* Start rx process */
CSR_WRITE_4( sc, COMMAND, COMMAND_RXQUEUED | COMMAND_START_RX | (sc->pending_txs?COMMAND_TXQUEUED:0));
}
/*
* Synopsis: Completely stop Rx and Tx processes. If TQE is set additional
* packet needs to be queued to stop Tx DMA.
*/
static void
epic_stop_activity __P((
epic_softc_t * sc))
{
int i;
/* Turn it to loopback mode */
CSR_WRITE_4( sc, TXCON, TXCON_SLOT_TIME|TXCON_LOOPBACK_MODE_INT );
/* Stop Tx and Rx DMA */
CSR_WRITE_4(sc,COMMAND,COMMAND_STOP_RX|COMMAND_STOP_RDMA|COMMAND_STOP_TDMA);
/* Wait only Rx DMA */
dprintf((EPIC_FORMAT ": waiting Rx DMA to stop\n",EPIC_ARGS(sc)));
for(i=0;i<0x1000;i++) {
if( (CSR_READ_4(sc,INTSTAT) & INTSTAT_RXIDLE) == INTSTAT_RXIDLE )
break;
DELAY(1);
}
if( !(CSR_READ_4(sc,INTSTAT)&INTSTAT_RXIDLE) )
printf(EPIC_FORMAT ": can't stop RX DMA\n",EPIC_ARGS(sc));
/* May need to queue one more packet if TQE */
if( (CSR_READ_4( sc, INTSTAT ) & INTSTAT_TQE) &&
!(CSR_READ_4( sc, INTSTAT ) & INTSTAT_TXIDLE) ){
dprintf((EPIC_FORMAT ": queue last packet\n",EPIC_ARGS(sc)));
sc->tx_desc[sc->cur_tx].bufaddr = vtophys( sc );
sc->tx_desc[sc->cur_tx].buflength = ETHER_MIN_LEN-ETHER_CRC_LEN;
sc->tx_desc[sc->cur_tx].control = 0x14;
sc->tx_desc[sc->cur_tx].txlength = ETHER_MIN_LEN-ETHER_CRC_LEN;
sc->tx_desc[sc->cur_tx].status = 0x8000;
sc->cur_tx = (sc->cur_tx + 1) & TX_RING_MASK;
sc->pending_txs++;
CSR_WRITE_4( sc, COMMAND, COMMAND_TXQUEUED );
dprintf((EPIC_FORMAT ": waiting Tx DMA to stop\n",EPIC_ARGS(sc)));
/* Wait TX DMA to stop */
for(i=0;i<0x1000;i++) {
if( (CSR_READ_4(sc,INTSTAT)&INTSTAT_TXIDLE) == INTSTAT_TXIDLE ) {
sc->pending_txs--;
break;
}
DELAY(1);
}
if( !(CSR_READ_4(sc,INTSTAT)&INTSTAT_TXIDLE) )
printf(EPIC_FORMAT ": can't stop TX DMA\n",EPIC_ARGS(sc));
/* Restore old TX state */
CSR_WRITE_4( sc, TXCON, sc->txcon );
}
}
/*
* Synopsis: Shut down board and deallocates rings.
*
* splimp() invoked here
*/
static void
epic_stop __P((
epic_softc_t * sc))
{
int s;
s = splimp();
sc->sc_if.if_timer = 0;
/* Disable interrupts */
CSR_WRITE_4( sc, INTMASK, 0 );
CSR_WRITE_4( sc, GENCTL, 0 );
/* Try to stop Rx and TX processes */
epic_stop_activity(sc);
/* Reset chip */
CSR_WRITE_4( sc, GENCTL, GENCTL_SOFT_RESET );
DELAY(10);
/* Free memory allocated for rings */
epic_free_rings(sc);
/* Mark as stoped */
sc->sc_if.if_flags &= ~IFF_RUNNING;
splx(s);
return;
}
/*
* Synopsis: This function should free all memory allocated for rings.
*/
static void
epic_free_rings __P((
epic_softc_t * sc))
{
int i;
for(i=0;i<RX_RING_SIZE;i++){
struct epic_rx_buffer *buf = sc->rx_buffer + i;
struct epic_rx_desc *desc = sc->rx_desc + i;
desc->status = 0;
desc->buflength = 0;
desc->bufaddr = 0;
if( buf->mbuf ) m_freem( buf->mbuf );
buf->mbuf = NULL;
}
for(i=0;i<TX_RING_SIZE;i++){
struct epic_tx_buffer *buf = sc->tx_buffer + i;
struct epic_tx_desc *desc = sc->tx_desc + i;
desc->status = 0;
desc->buflength = 0;
desc->bufaddr = 0;
if( buf->mbuf ) m_freem( buf->mbuf );
buf->mbuf = NULL;
}
}
/*
* Synopsis: Allocates mbufs for Rx ring and point Rx descs to them.
* Point Tx descs to fragment lists. Check that all descs and fraglists
* are bounded and aligned properly.
*/
static int
epic_init_rings(epic_softc_t * sc){
int i;
sc->cur_rx = sc->cur_tx = sc->dirty_tx = sc->pending_txs = 0;
for (i = 0; i < RX_RING_SIZE; i++) {
struct epic_rx_buffer *buf = sc->rx_buffer + i;
struct epic_rx_desc *desc = sc->rx_desc + i;
desc->status = 0; /* Owned by driver */
desc->next = vtophys( sc->rx_desc + ((i+1) & RX_RING_MASK) );
if( (desc->next & 3) || ((desc->next & 0xFFF) + sizeof(struct epic_rx_desc) > 0x1000 ) )
printf(EPIC_FORMAT ": WARNING! rx_desc is misbound or misaligned\n",EPIC_ARGS(sc));
EPIC_MGETCLUSTER( buf->mbuf );
if( NULL == buf->mbuf ) {
epic_free_rings(sc);
return -1;
}
desc->bufaddr = vtophys( mtod(buf->mbuf,caddr_t) );
desc->buflength = ETHER_MAX_FRAME_LEN;
desc->status = 0x8000; /* Give to EPIC */
}
for (i = 0; i < TX_RING_SIZE; i++) {
struct epic_tx_buffer *buf = sc->tx_buffer + i;
struct epic_tx_desc *desc = sc->tx_desc + i;
desc->status = 0;
desc->next = vtophys( sc->tx_desc + ( (i+1) & TX_RING_MASK ) );
if( (desc->next & 3) || ((desc->next & 0xFFF) + sizeof(struct epic_tx_desc) > 0x1000 ) )
printf(EPIC_FORMAT ": WARNING! tx_desc is misbound or misaligned\n",EPIC_ARGS(sc));
buf->mbuf = NULL;
desc->bufaddr = vtophys( sc->tx_flist + i );
if( (desc->bufaddr & 3) || ((desc->bufaddr & 0xFFF) + sizeof(struct epic_frag_list) > 0x1000 ) )
printf(EPIC_FORMAT ": WARNING! frag_list is misbound or misaligned\n",EPIC_ARGS(sc));
}
return 0;
}
/*
* EEPROM operation functions
*/
static void epic_write_eepromreg __P((
epic_softc_t *sc,
u_int8_t val))
{
u_int16_t i;
CSR_WRITE_1( sc, EECTL, val );
for( i=0;i<0xFF; i++)
if( !(CSR_READ_1( sc, EECTL ) & 0x20) ) break;
return;
}
static u_int8_t
epic_read_eepromreg __P((
epic_softc_t *sc))
{
return CSR_READ_1( sc,EECTL );
}
static u_int8_t
epic_eeprom_clock __P((
epic_softc_t *sc,
u_int8_t val))
{
epic_write_eepromreg( sc, val );
epic_write_eepromreg( sc, (val | 0x4) );
epic_write_eepromreg( sc, val );
return epic_read_eepromreg( sc );
}
static void
epic_output_eepromw __P((
epic_softc_t * sc,
u_int16_t val))
{
int i;
for( i = 0xF; i >= 0; i--){
if( (val & (1 << i)) ) epic_eeprom_clock( sc, 0x0B );
else epic_eeprom_clock( sc, 3);
}
}
static u_int16_t
epic_input_eepromw __P((
epic_softc_t *sc))
{
int i;
int tmp;
u_int16_t retval = 0;
for( i = 0xF; i >= 0; i--) {
tmp = epic_eeprom_clock( sc, 0x3 );
if( tmp & 0x10 ){
retval |= (1 << i);
}
}
return retval;
}
static int
epic_read_eeprom __P((
epic_softc_t *sc,
u_int16_t loc))
{
u_int16_t dataval;
u_int16_t read_cmd;
epic_write_eepromreg( sc , 3);
if( epic_read_eepromreg( sc ) & 0x40 )
read_cmd = ( loc & 0x3F ) | 0x180;
else
read_cmd = ( loc & 0xFF ) | 0x600;
epic_output_eepromw( sc, read_cmd );
dataval = epic_input_eepromw( sc );
epic_write_eepromreg( sc, 1 );
return dataval;
}
static u_int16_t
epic_read_phy_register __P((
epic_softc_t *sc,
u_int16_t loc))
{
int i;
CSR_WRITE_4( sc, MIICTL, ((loc << 4) | 0x0601) );
for( i=0;i<0x1000;i++) if( !(CSR_READ_4( sc, MIICTL )&1) ) break;
return CSR_READ_4( sc, MIIDATA );
}
static void
epic_write_phy_register __P((
epic_softc_t * sc,
u_int16_t loc,
u_int16_t val))
{
int i;
CSR_WRITE_4( sc, MIIDATA, val );
CSR_WRITE_4( sc, MIICTL, ((loc << 4) | 0x0602) );
for( i=0;i<0x1000;i++) if( !(CSR_READ_4( sc, MIICTL )&2) ) break;
return;
}
static void
epic_dump_state __P((
epic_softc_t * sc))
{
int j;
struct epic_tx_desc *tdesc;
struct epic_rx_desc *rdesc;
printf(EPIC_FORMAT ": cur_rx: %d, pending_txs: %d, dirty_tx: %d, cur_tx: %d\n", EPIC_ARGS(sc),sc->cur_rx,sc->pending_txs,sc->dirty_tx,sc->cur_tx);
printf(EPIC_FORMAT ": COMMAND: 0x%08x, INTSTAT: 0x%08x\n",EPIC_ARGS(sc),CSR_READ_4(sc,COMMAND),CSR_READ_4(sc,INTSTAT));
printf(EPIC_FORMAT ": PRCDAR: 0x%08x, PTCDAR: 0x%08x\n",EPIC_ARGS(sc),CSR_READ_4(sc,PRCDAR),CSR_READ_4(sc,PTCDAR));
printf(EPIC_FORMAT ": dumping rx descriptors\n",EPIC_ARGS(sc));
for(j=0;j<RX_RING_SIZE;j++){
rdesc = sc->rx_desc + j;
printf("desc%d: %4d 0x%04x, 0x%08x, %4d, 0x%08x\n",
j,
rdesc->rxlength,rdesc->status,
rdesc->bufaddr,
rdesc->buflength,
rdesc->next
);
}
printf(EPIC_FORMAT ": dumping tx descriptors\n",EPIC_ARGS(sc));
for(j=0;j<TX_RING_SIZE;j++){
tdesc = sc->tx_desc + j;
printf(
"desc%d: %4d 0x%04x, 0x%08lx, 0x%04x %4u, 0x%08lx, mbuf: %p\n",
j,
tdesc->txlength,tdesc->status,
(u_long)tdesc->bufaddr,
tdesc->control,tdesc->buflength,
(u_long)tdesc->next,
(void *)sc->tx_buffer[j].mbuf
);
}
}
#endif /* NPCI > 0 */
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