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freebsd-nq/sys/pci/if_fxp.c
David Greenman 1cd443ace8 Fixed a bug with the management of the pointer to the first TxCB in the 
ring that caused wrong things to happen sometimes.
Doubled the number of transmit descriptors to 128 so that the internal
FIFO in the NIC can be fully filled when dealing with small packets.
Several minor performance improvements.
1996-09-22 11:48:54 +00:00

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/*
* Copyright (c) 1995, David Greenman
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice unmodified, this list of conditions, and the following
* disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $Id: if_fxp.c,v 1.18 1996/09/20 11:05:39 davidg Exp $
*/
/*
* Intel EtherExpress Pro/100B PCI Fast Ethernet driver
*/
#include "bpfilter.h"
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/ioctl.h>
#include <sys/mbuf.h>
#include <sys/malloc.h>
#include <sys/kernel.h>
#include <sys/syslog.h>
#include <net/if.h>
#include <net/if_dl.h>
#include <net/if_types.h>
#ifdef INET
#include <netinet/in.h>
#include <netinet/in_systm.h>
#include <netinet/in_var.h>
#include <netinet/ip.h>
#include <netinet/if_ether.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
#include <vm/vm.h> /* for vtophys */
#include <vm/vm_param.h> /* for vtophys */
#include <vm/pmap.h> /* for vtophys */
#include <machine/clock.h> /* for DELAY */
#include <pci/pcivar.h>
#include <pci/if_fxpreg.h>
struct fxp_softc {
struct arpcom arpcom; /* per-interface network data */
struct fxp_csr *csr; /* control/status registers */
struct fxp_cb_tx *cbl_base; /* base of TxCB list */
struct fxp_cb_tx *cbl_first; /* first active TxCB in list */
struct fxp_cb_tx *cbl_last; /* last active TxCB in list */
struct mbuf *rfa_headm; /* first mbuf in receive frame area */
struct mbuf *rfa_tailm; /* last mbuf in receive frame area */
struct fxp_stats *fxp_stats; /* Pointer to interface stats */
int tx_queued; /* # of active TxCB's */
int promisc_mode; /* promiscuous mode enabled */
};
static u_long fxp_count;
/*
* Template for default configuration parameters.
* See struct fxp_cb_config for the bit definitions.
*/
static u_char fxp_cb_config_template[] = {
0x0, 0x0, /* cb_status */
0x80, 0x2, /* cb_command */
0xff, 0xff, 0xff, 0xff, /* link_addr */
0x16, /* 0 */
0x8, /* 1 */
0x0, /* 2 */
0x0, /* 3 */
0x0, /* 4 */
0x80, /* 5 */
0xb2, /* 6 */
0x3, /* 7 */
0x1, /* 8 */
0x0, /* 9 */
0x26, /* 10 */
0x0, /* 11 */
0x60, /* 12 */
0x0, /* 13 */
0xf2, /* 14 */
0x48, /* 15 */
0x0, /* 16 */
0x40, /* 17 */
0xf3, /* 18 */
0x0, /* 19 */
0x3f, /* 20 */
0x5, /* 21 */
0x0, 0x0
};
static inline void fxp_scb_wait __P((struct fxp_csr *));
static char *fxp_probe __P((pcici_t, pcidi_t));
static void fxp_attach __P((pcici_t, int));
static void fxp_intr __P((void *));
static void fxp_start __P((struct ifnet *));
static int fxp_ioctl __P((struct ifnet *, int, caddr_t));
static void fxp_init __P((struct ifnet *));
static void fxp_stop __P((struct fxp_softc *));
static void fxp_watchdog __P((struct ifnet *));
static void fxp_get_macaddr __P((struct fxp_softc *));
static int fxp_add_rfabuf __P((struct fxp_softc *, struct mbuf *));
static void fxp_shutdown __P((int, void *));
timeout_t fxp_stats_update;
static struct pci_device fxp_device = {
"fxp",
fxp_probe,
fxp_attach,
&fxp_count,
NULL
};
DATA_SET(pcidevice_set, fxp_device);
/*
* Set initial transmit threshold at 64 (512 bytes). This is
* increased by 64 (512 bytes) at a time, to maximum of 192
* (1536 bytes), if an underrun occurs.
*/
static int tx_threshold = 64;
/*
* Number of transmit control blocks. This determines the number
* of transmit buffers that can be chained in the CB list.
* This must be a power of two.
*/
#define FXP_NTXCB 128
/*
* TxCB list index mask. This is used to do list wrap-around.
*/
#define FXP_TXCB_MASK (FXP_NTXCB - 1)
/*
* Number of DMA segments in a TxCB. Note that this is carefully
* chosen to make the total struct size an even power of two. It's
* critical that no TxCB be split across a page boundry since
* no attempt is made to allocate physically contiguous memory.
*
* XXX - don't forget to change the hard-coded constant in the
* fxp_cb_tx struct (defined in if_fxpreg.h), too!
*/
#define FXP_NTXSEG 29
/*
* Number of receive frame area buffers. These are large so chose
* wisely.
*/
#define FXP_NRFABUFS 32
/*
* Wait for the previous command to be accepted (but not necessarily
* completed).
*/
static inline void
fxp_scb_wait(csr)
struct fxp_csr *csr;
{
int i = 10000;
while ((csr->scb_command & FXP_SCB_COMMAND_MASK) && --i);
}
/*
* Return identification string if this is device is ours.
*/
static char *
fxp_probe(config_id, device_id)
pcici_t config_id;
pcidi_t device_id;
{
if (((device_id & 0xffff) == FXP_VENDORID_INTEL) &&
((device_id >> 16) & 0xffff) == FXP_DEVICEID_i82557)
return ("Intel EtherExpress Pro/100B Fast Ethernet");
return NULL;
}
/*
* Allocate data structures and attach the device.
*/
static void
fxp_attach(config_id, unit)
pcici_t config_id;
int unit;
{
struct fxp_softc *sc;
struct ifnet *ifp;
vm_offset_t pbase;
int s, i;
sc = malloc(sizeof(struct fxp_softc), M_DEVBUF, M_NOWAIT);
if (sc == NULL)
return;
bzero(sc, sizeof(struct fxp_softc));
s = splimp();
/*
* Map control/status registers.
*/
if (!pci_map_mem(config_id, FXP_PCI_MMBA,
(vm_offset_t *)&sc->csr, &pbase)) {
printf("fxp%d: couldn't map memory\n", unit);
goto fail;
}
/*
* Issue a software reset.
*/
sc->csr->port = 0;
DELAY(10);
/*
* Allocate our interrupt.
*/
if (!pci_map_int(config_id, fxp_intr, sc, &net_imask)) {
printf("fxp%d: couldn't map interrupt\n", unit);
goto fail;
}
sc->cbl_base = malloc(sizeof(struct fxp_cb_tx) * FXP_NTXCB,
M_DEVBUF, M_NOWAIT);
if (sc->cbl_base == NULL)
goto malloc_fail;
sc->fxp_stats = malloc(sizeof(struct fxp_stats), M_DEVBUF, M_NOWAIT);
if (sc->fxp_stats == NULL)
goto malloc_fail;
bzero(sc->fxp_stats, sizeof(struct fxp_stats));
/*
* Pre-allocate our receive buffers.
*/
for (i = 0; i < FXP_NRFABUFS; i++) {
if (fxp_add_rfabuf(sc, NULL) != 0) {
goto malloc_fail;
}
}
ifp = &sc->arpcom.ac_if;
ifp->if_softc = sc;
ifp->if_unit = unit;
ifp->if_name = "fxp";
ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST;
ifp->if_ioctl = fxp_ioctl;
ifp->if_output = ether_output;
ifp->if_start = fxp_start;
ifp->if_watchdog = fxp_watchdog;
ifp->if_baudrate = 100000000;
fxp_get_macaddr(sc);
printf("fxp%d: Ethernet address %6D\n", unit,
sc->arpcom.ac_enaddr, ":");
/*
* Attach the interface.
*/
if_attach(ifp);
ether_ifattach(ifp);
#if NBPFILTER > 0
bpfattach(ifp, DLT_EN10MB, sizeof(struct ether_header));
#endif
/*
* Add shutdown hook so that DMA is disabled prior to reboot. Not
* doing do could allow DMA to corrupt kernel memory during the
* reboot before the driver initializes.
*/
at_shutdown(fxp_shutdown, sc, SHUTDOWN_POST_SYNC);
splx(s);
return;
malloc_fail:
printf("fxp%d: Failed to malloc memory\n", unit);
(void) pci_unmap_int(config_id);
if (sc && sc->cbl_base)
free(sc->cbl_base, M_DEVBUF);
if (sc && sc->fxp_stats)
free(sc->fxp_stats, M_DEVBUF);
/* frees entire chain */
if (sc && sc->rfa_headm)
m_freem(sc->rfa_headm);
fail:
if (sc)
free(sc, M_DEVBUF);
splx(s);
}
/*
* Read station (MAC) address from serial EEPROM. Basically, you
* manually shift in the read opcode (one bit at a time) and then
* shift in the address, and then you shift out the data (all of
* this one bit at a time). The word size is 16 bits, so you have
* to provide the address for every 16 bits of data. The MAC address
* is in the first 3 words (6 bytes total).
*/
static void
fxp_get_macaddr(sc)
struct fxp_softc *sc;
{
struct fxp_csr *csr;
u_short reg, *data;
int i, x;
csr = sc->csr;
data = (u_short *)sc->arpcom.ac_enaddr;
for (i = 0; i < 3; i++) {
csr->eeprom_control = FXP_EEPROM_EECS;
/*
* Shift in read opcode.
*/
for (x = 3; x > 0; x--) {
if (FXP_EEPROM_OPC_READ & (1 << (x - 1))) {
reg = FXP_EEPROM_EECS | FXP_EEPROM_EEDI;
} else {
reg = FXP_EEPROM_EECS;
}
csr->eeprom_control = reg;
csr->eeprom_control = reg | FXP_EEPROM_EESK;
DELAY(1);
csr->eeprom_control = reg;
DELAY(1);
}
/*
* Shift in address.
*/
for (x = 6; x > 0; x--) {
if (i & (1 << (x - 1))) {
reg = FXP_EEPROM_EECS | FXP_EEPROM_EEDI;
} else {
reg = FXP_EEPROM_EECS;
}
csr->eeprom_control = reg;
csr->eeprom_control = reg | FXP_EEPROM_EESK;
DELAY(1);
csr->eeprom_control = reg;
DELAY(1);
}
reg = FXP_EEPROM_EECS;
data[i] = 0;
/*
* Shift out data.
*/
for (x = 16; x > 0; x--) {
csr->eeprom_control = reg | FXP_EEPROM_EESK;
DELAY(1);
if (csr->eeprom_control & FXP_EEPROM_EEDO)
data[i] |= (1 << (x - 1));
csr->eeprom_control = reg;
DELAY(1);
}
csr->eeprom_control = 0;
DELAY(1);
}
}
/*
* Device shutdown routine. Called at system shutdown after sync. The
* main purpose of this routine is to shut off receiver DMA so that
* kernel memory doesn't get clobbered during warmboot.
*/
static void
fxp_shutdown(howto, sc)
int howto;
void *sc;
{
fxp_stop((struct fxp_softc *) sc);
}
/*
* Start packet transmission on the interface.
*/
static void
fxp_start(ifp)
struct ifnet *ifp;
{
struct fxp_softc *sc = ifp->if_softc;
struct fxp_csr *csr = sc->csr;
struct fxp_cb_tx *txp;
struct mbuf *m, *mb_head;
int segment;
txloop:
/*
* See if we're all filled up with buffers to transmit.
*/
if (sc->tx_queued >= FXP_NTXCB)
return;
/*
* Grab a packet to transmit.
*/
IF_DEQUEUE(&sc->arpcom.ac_if.if_snd, mb_head);
if (mb_head == NULL) {
/*
* No more packets to send.
*/
return;
}
/*
* Get pointer to next available (unused) descriptor.
*/
txp = sc->cbl_last->next;
/*
* Go through each of the mbufs in the chain and initialize
* the transmit buffers descriptors with the physical address
* and size of the mbuf.
*/
tbdinit:
for (m = mb_head, segment = 0; m != NULL; m = m->m_next) {
if (m->m_len != 0) {
if (segment == FXP_NTXSEG)
break;
txp->tbd[segment].tb_addr =
vtophys(mtod(m, vm_offset_t));
txp->tbd[segment].tb_size = m->m_len;
segment++;
}
}
if (m != NULL && segment == FXP_NTXSEG) {
struct mbuf *mn;
/*
* We ran out of segments. We have to recopy this mbuf
* chain first.
*/
MGETHDR(mn, M_DONTWAIT, MT_DATA);
if (mn == NULL) {
m_freem(mb_head);
return;
}
if (mb_head->m_pkthdr.len > MHLEN) {
MCLGET(mn, M_DONTWAIT);
if ((mn->m_flags & M_EXT) == 0) {
m_freem(mn);
m_freem(mb_head);
return;
}
}
m_copydata(mb_head, 0, mb_head->m_pkthdr.len, mtod(mn, caddr_t));
mn->m_pkthdr.len = mn->m_len = mb_head->m_pkthdr.len;
m_freem(mb_head);
mb_head = mn;
goto tbdinit;
}
txp->tbd_number = segment;
txp->mb_head = mb_head;
/*
* Finish the initialization of this TxCB.
*/
txp->cb_status = 0;
txp->cb_command =
FXP_CB_COMMAND_XMIT | FXP_CB_COMMAND_SF | FXP_CB_COMMAND_S;
txp->tx_threshold = tx_threshold;
/*
* Advance the end-of-list forward.
*/
sc->cbl_last->cb_command &= ~FXP_CB_COMMAND_S;
sc->cbl_last = txp;
/*
* Advance the beginning of the list forward if there are
* no other packets queued (when nothing is queued, cbl_first
* sits on the last TxCB that was sent out)..
*/
if (sc->tx_queued == 0)
sc->cbl_first = txp;
sc->tx_queued++;
if (csr->scb_cus == FXP_SCB_CUS_SUSPENDED) {
fxp_scb_wait(csr);
/*
* Resume transmission.
*/
csr->scb_command = FXP_SCB_COMMAND_CU_RESUME;
}
#if NBPFILTER > 0
/*
* Pass packet to bpf if there is a listener.
*/
if (ifp->if_bpf != NULL)
bpf_mtap(ifp, mb_head);
#endif
/*
* Set a 5 second timer just in case we don't hear from the
* card again.
*/
ifp->if_timer = 5;
goto txloop;
}
/*
* Process interface interrupts. Returns 1 if the interrupt
* was handled, 0 if it wasn't.
*/
static void
fxp_intr(arg)
void *arg;
{
struct fxp_softc *sc = arg;
struct fxp_csr *csr = sc->csr;
struct ifnet *ifp = &sc->arpcom.ac_if;
u_int8_t statack;
while ((statack = csr->scb_statack) != 0) {
/*
* First ACK all the interrupts in this pass.
*/
csr->scb_statack = statack;
/*
* Free any finished transmit mbuf chains.
*/
if (statack & FXP_SCB_STATACK_CNA) {
struct fxp_cb_tx *txp;
for (txp = sc->cbl_first;
(txp->cb_status & FXP_CB_STATUS_C) != 0;
txp = txp->next) {
if (txp->mb_head != NULL) {
m_freem(txp->mb_head);
txp->mb_head = NULL;
sc->tx_queued--;
}
if (txp->cb_command & FXP_CB_COMMAND_S)
break;
}
sc->cbl_first = txp;
/*
* Clear watchdog timer. It may or may not be set
* again in fxp_start().
*/
ifp->if_timer = 0;
fxp_start(ifp);
}
/*
* Process receiver interrupts. If a no-resource (RNR)
* condition exists, get whatever packets we can and
* re-start the receiver.
*/
if (statack & (FXP_SCB_STATACK_FR | FXP_SCB_STATACK_RNR)) {
struct mbuf *m;
struct fxp_rfa *rfa;
rcvloop:
m = sc->rfa_headm;
rfa = (struct fxp_rfa *)m->m_ext.ext_buf;
if (rfa->rfa_status & FXP_RFA_STATUS_C) {
/*
* Remove first packet from the chain.
*/
sc->rfa_headm = m->m_next;
m->m_next = NULL;
/*
* Add a new buffer to the receive chain. If this
* fails, the old buffer is recycled instead.
*/
if (fxp_add_rfabuf(sc, m) == 0) {
struct ether_header *eh;
u_short total_len;
total_len = rfa->actual_size & (MCLBYTES - 1);
m->m_pkthdr.rcvif = ifp;
m->m_pkthdr.len = m->m_len = total_len -
sizeof(struct ether_header);
eh = mtod(m, struct ether_header *);
#if NBPFILTER > 0
if (ifp->if_bpf != NULL) {
bpf_tap(ifp, mtod(m, caddr_t), total_len);
/*
* Only pass this packet up if it is for us.
*/
if ((ifp->if_flags & IFF_PROMISC) &&
(rfa->rfa_status & FXP_RFA_STATUS_IAMATCH) &&
(eh->ether_dhost[0] & 1) == 0) {
m_freem(m);
goto rcvloop;
}
}
#endif
m->m_data += sizeof(struct ether_header);
ether_input(ifp, eh, m);
}
goto rcvloop;
}
if (statack & FXP_SCB_STATACK_RNR) {
struct fxp_csr *csr = sc->csr;
fxp_scb_wait(csr);
csr->scb_general = vtophys(sc->rfa_headm->m_ext.ext_buf);
csr->scb_command = FXP_SCB_COMMAND_RU_START;
}
}
}
}
/*
* Update packet in/out/collision statistics. The i82557 doesn't
* allow you to access these counters without doing a fairly
* expensive DMA to get _all_ of the statistics it maintains, so
* we do this operation here only once per second. The statistics
* counters in the kernel are updated from the previous dump-stats
* DMA and then a new dump-stats DMA is started. The on-chip
* counters are zeroed when the DMA completes. If we can't start
* the DMA immediately, we don't wait - we just prepare to read
* them again next time.
*/
void
fxp_stats_update(arg)
void *arg;
{
struct fxp_softc *sc = arg;
struct ifnet *ifp = &sc->arpcom.ac_if;
struct fxp_stats *sp = sc->fxp_stats;
ifp->if_opackets += sp->tx_good;
ifp->if_collisions += sp->tx_total_collisions;
ifp->if_ipackets += sp->rx_good;
ifp->if_ierrors +=
sp->rx_crc_errors +
sp->rx_alignment_errors +
sp->rx_rnr_errors +
sp->rx_overrun_errors +
sp->rx_shortframes;
/*
* If any transmit underruns occured, bump up the transmit
* threshold by another 512 bytes (64 * 8).
*/
if (sp->tx_underruns) {
ifp->if_oerrors += sp->tx_underruns;
if (tx_threshold < 192)
tx_threshold += 64;
}
/*
* If there is no pending command, start another stats
* dump. Otherwise punt for now.
*/
if ((sc->csr->scb_command & FXP_SCB_COMMAND_MASK) == 0) {
/*
* Start another stats dump. By waiting for it to be
* accepted, we avoid having to do splhigh locking when
* writing scb_command in other parts of the driver.
*/
sc->csr->scb_command = FXP_SCB_COMMAND_CU_DUMPRESET;
fxp_scb_wait(sc->csr);
} else {
/*
* A previous command is still waiting to be accepted.
* Just zero our copy of the stats and wait for the
* next timer event to update them.
*/
sp->tx_good = 0;
sp->tx_underruns = 0;
sp->tx_total_collisions = 0;
sp->rx_good = 0;
sp->rx_crc_errors = 0;
sp->rx_alignment_errors = 0;
sp->rx_rnr_errors = 0;
sp->rx_overrun_errors = 0;
sp->rx_shortframes = 0;;
}
/*
* Schedule another timeout one second from now.
*/
timeout(fxp_stats_update, sc, hz);
}
/*
* Stop the interface. Cancels the statistics updater and resets
* the interface.
*/
static void
fxp_stop(sc)
struct fxp_softc *sc;
{
struct ifnet *ifp = &sc->arpcom.ac_if;
struct fxp_cb_tx *txp;
int i;
/*
* Cancel stats updater.
*/
untimeout(fxp_stats_update, sc);
/*
* Issue software reset
*/
sc->csr->port = 0;
DELAY(10);
/*
* Release any xmit buffers.
*/
for (txp = sc->cbl_first; txp != NULL && txp->mb_head != NULL;
txp = txp->next) {
m_freem(txp->mb_head);
txp->mb_head = NULL;
}
sc->tx_queued = 0;
/*
* Free all the receive buffers then reallocate/reinitialize
*/
if (sc->rfa_headm != NULL)
m_freem(sc->rfa_headm);
sc->rfa_headm = NULL;
sc->rfa_tailm = NULL;
for (i = 0; i < FXP_NRFABUFS; i++) {
if (fxp_add_rfabuf(sc, NULL) != 0) {
/*
* This "can't happen" - we're at splimp()
* and we just freed all the buffers we need
* above.
*/
panic("fxp_stop: no buffers!");
}
}
ifp->if_flags &= ~(IFF_RUNNING | IFF_OACTIVE);
ifp->if_timer = 0;
}
/*
* Watchdog/transmission transmit timeout handler. Called when a
* transmission is started on the interface, but no interrupt is
* received before the timeout. This usually indicates that the
* card has wedged for some reason.
*/
static void
fxp_watchdog(ifp)
struct ifnet *ifp;
{
log(LOG_ERR, "fxp%d: device timeout\n", ifp->if_unit);
ifp->if_oerrors++;
fxp_init(ifp);
}
static void
fxp_init(ifp)
struct ifnet *ifp;
{
struct fxp_softc *sc = ifp->if_softc;
struct fxp_cb_config *cbp;
struct fxp_cb_ias *cb_ias;
struct fxp_cb_tx *txp;
struct fxp_csr *csr = sc->csr;
int i, s, mcast, prm;
s = splimp();
/*
* Cancel any pending I/O
*/
fxp_stop(sc);
prm = (ifp->if_flags & IFF_PROMISC) ? 1 : 0;
sc->promisc_mode = prm;
/*
* Sleeze out here and enable reception of all multicasts if
* multicasts are enabled. Ideally, we'd program the multicast
* address filter to only accept specific multicasts.
*/
mcast = (ifp->if_flags & (IFF_MULTICAST|IFF_ALLMULTI)) ? 1 : 0;
/*
* Initialize base of CBL and RFA memory. Loading with zero
* sets it up for regular linear addressing.
*/
csr->scb_general = 0;
csr->scb_command = FXP_SCB_COMMAND_CU_BASE;
fxp_scb_wait(csr);
csr->scb_command = FXP_SCB_COMMAND_RU_BASE;
/*
* Initialize base of dump-stats buffer.
*/
fxp_scb_wait(csr);
csr->scb_general = vtophys(sc->fxp_stats);
csr->scb_command = FXP_SCB_COMMAND_CU_DUMP_ADR;
/*
* We temporarily use memory that contains the TxCB list to
* construct the config CB. The TxCB list memory is rebuilt
* later.
*/
cbp = (struct fxp_cb_config *) sc->cbl_base;
/*
* This bcopy is kind of disgusting, but there are a bunch of must be
* zero and must be one bits in this structure and this is the easiest
* way to initialize them all to proper values.
*/
bcopy(fxp_cb_config_template, cbp, sizeof(struct fxp_cb_config));
cbp->cb_status = 0;
cbp->cb_command = FXP_CB_COMMAND_CONFIG | FXP_CB_COMMAND_EL;
cbp->link_addr = -1; /* (no) next command */
cbp->byte_count = 22; /* (22) bytes to config */
cbp->rx_fifo_limit = 8; /* rx fifo threshold */
cbp->tx_fifo_limit = 0; /* tx fifo threshold */
cbp->adaptive_ifs = 0; /* (no) adaptive interframe spacing */
cbp->rx_dma_bytecount = 16; /* (no) rx DMA max */
cbp->tx_dma_bytecount = 16; /* (no) tx DMA max */
cbp->dma_bce = 1; /* (enable) dma max counters */
cbp->late_scb = 0; /* (don't) defer SCB update */
cbp->tno_int = 0; /* (disable) tx not okay interrupt */
cbp->ci_int = 0; /* (do) interrupt on CU not active */
cbp->save_bf = prm; /* save bad frames */
cbp->disc_short_rx = !prm; /* discard short packets */
cbp->underrun_retry = 1; /* retry mode (1) on DMA underrun */
cbp->mediatype = 1; /* (MII) interface mode */
cbp->nsai = 1; /* (don't) disable source addr insert */
cbp->preamble_length = 2; /* (7 byte) preamble */
cbp->loopback = 0; /* (don't) loopback */
cbp->linear_priority = 0; /* (normal CSMA/CD operation) */
cbp->linear_pri_mode = 0; /* (wait after xmit only) */
cbp->interfrm_spacing = 6; /* (96 bits of) interframe spacing */
cbp->promiscuous = prm; /* promiscuous mode */
cbp->bcast_disable = 0; /* (don't) disable broadcasts */
cbp->crscdt = 0; /* (CRS only) */
cbp->stripping = !prm; /* truncate rx packet to byte count */
cbp->padding = 1; /* (do) pad short tx packets */
cbp->rcv_crc_xfer = 0; /* (don't) xfer CRC to host */
cbp->force_fdx = 0; /* (don't) force full duplex */
cbp->fdx_pin_en = 1; /* (enable) FDX# pin */
cbp->multi_ia = 0; /* (don't) accept multiple IAs */
cbp->mc_all = mcast; /* accept all multicasts */
/*
* Start the config command/DMA.
*/
fxp_scb_wait(csr);
csr->scb_general = vtophys(cbp);
csr->scb_command = FXP_SCB_COMMAND_CU_START;
/* ...and wait for it to complete. */
while (!(cbp->cb_status & FXP_CB_STATUS_C));
/*
* Now initialize the station address. Temporarily use the TxCB
* memory area like we did above for the config CB.
*/
cb_ias = (struct fxp_cb_ias *) sc->cbl_base;
cb_ias->cb_status = 0;
cb_ias->cb_command = FXP_CB_COMMAND_IAS | FXP_CB_COMMAND_EL;
cb_ias->link_addr = -1;
bcopy(sc->arpcom.ac_enaddr, (void *)cb_ias->macaddr,
sizeof(sc->arpcom.ac_enaddr));
/*
* Start the IAS (Individual Address Setup) command/DMA.
*/
fxp_scb_wait(csr);
csr->scb_command = FXP_SCB_COMMAND_CU_START;
/* ...and wait for it to complete. */
while (!(cb_ias->cb_status & FXP_CB_STATUS_C));
/*
* Initialize transmit control block (TxCB) list.
*/
txp = sc->cbl_base;
bzero(txp, sizeof(struct fxp_cb_tx) * FXP_NTXCB);
for (i = 0; i < FXP_NTXCB; i++) {
txp[i].cb_status = FXP_CB_STATUS_C | FXP_CB_STATUS_OK;
txp[i].cb_command = FXP_CB_COMMAND_NOP;
txp[i].link_addr = vtophys(&txp[(i + 1) & FXP_TXCB_MASK]);
txp[i].tbd_array_addr = vtophys(&txp[i].tbd[0]);
txp[i].next = &txp[(i + 1) & FXP_TXCB_MASK];
}
/*
* Set the stop flag on the first TxCB and start the control
* unit. It will execute the NOP and then suspend.
*/
txp->cb_command = FXP_CB_COMMAND_NOP | FXP_CB_COMMAND_S;
sc->cbl_first = sc->cbl_last = txp;
sc->tx_queued = 0;
fxp_scb_wait(csr);
csr->scb_command = FXP_SCB_COMMAND_CU_START;
/*
* Initialize receiver buffer area - RFA.
*/
fxp_scb_wait(csr);
csr->scb_general = vtophys(sc->rfa_headm->m_ext.ext_buf);
csr->scb_command = FXP_SCB_COMMAND_RU_START;
ifp->if_flags |= IFF_RUNNING;
ifp->if_flags &= ~IFF_OACTIVE;
splx(s);
/*
* Start stats updater.
*/
timeout(fxp_stats_update, sc, hz);
}
/*
* Add a buffer to the end of the RFA buffer list.
* Return 0 if successful, 1 for failure. A failure results in
* adding the 'oldm' (if non-NULL) on to the end of the list -
* tossing out it's old contents and recycling it.
* The RFA struct is stuck at the beginning of mbuf cluster and the
* data pointer is fixed up to point just past it.
*/
static int
fxp_add_rfabuf(sc, oldm)
struct fxp_softc *sc;
struct mbuf *oldm;
{
struct mbuf *m;
struct fxp_rfa *rfa, *p_rfa;
MGETHDR(m, M_DONTWAIT, MT_DATA);
if (m != NULL) {
MCLGET(m, M_DONTWAIT);
if ((m->m_flags & M_EXT) == 0) {
m_freem(m);
if (oldm == NULL)
return 1;
m = oldm;
m->m_data = m->m_ext.ext_buf;
}
} else {
if (oldm == NULL)
return 1;
m = oldm;
m->m_data = m->m_ext.ext_buf;
}
/*
* Get a pointer to the base of the mbuf cluster and move
* data start past it.
*/
rfa = mtod(m, struct fxp_rfa *);
m->m_data += sizeof(struct fxp_rfa);
rfa->size = MCLBYTES - sizeof(struct fxp_rfa);
rfa->rfa_status = 0;
rfa->rfa_control = FXP_RFA_CONTROL_EL;
rfa->link_addr = -1;
rfa->rbd_addr = -1;
rfa->actual_size = 0;
/*
* If there are other buffers already on the list, attach this
* one to the end by fixing up the tail to point to this one.
*/
if (sc->rfa_headm != NULL) {
p_rfa = (struct fxp_rfa *) sc->rfa_tailm->m_ext.ext_buf;
sc->rfa_tailm->m_next = m;
p_rfa->link_addr = vtophys(rfa);
p_rfa->rfa_control &= ~FXP_RFA_CONTROL_EL;
} else {
sc->rfa_headm = m;
}
sc->rfa_tailm = m;
return (m == oldm);
}
static int
fxp_ioctl(ifp, command, data)
struct ifnet *ifp;
int command;
caddr_t data;
{
struct ifaddr *ifa = (struct ifaddr *) data;
struct fxp_softc *sc = ifp->if_softc;
struct ifreq *ifr = (struct ifreq *) data;
int s, error = 0;
s = splimp();
switch (command) {
case SIOCSIFADDR:
ifp->if_flags |= IFF_UP;
switch (ifa->ifa_addr->sa_family) {
#ifdef INET
case AF_INET:
fxp_init(ifp); /* before arpwhohas */
arp_ifinit((struct arpcom *)ifp, ifa);
break;
#endif
#ifdef IPX
/*
* XXX - This code is probably wrong
*/
case AF_IPX:
{
register struct ipx_addr *ina = &(IA_SIPX(ifa)->sipx_addr);
if (ipx_nullhost(*ina))
ina->x_host =
*(union ipx_host *) (sc->arpcom.ac_enaddr);
else {
bcopy((caddr_t) ina->x_host.c_host,
(caddr_t) sc->arpcom.ac_enaddr,
sizeof(sc->arpcom.ac_enaddr));
}
/*
* Set new address
*/
fxp_init(ifp);
break;
}
#endif
#ifdef NS
/*
* XXX - This code is probably wrong
*/
case AF_NS:
{
register struct ns_addr *ina = &(IA_SNS(ifa)->sns_addr);
if (ns_nullhost(*ina))
ina->x_host =
*(union ns_host *) (sc->arpcom.ac_enaddr);
else {
bcopy((caddr_t) ina->x_host.c_host,
(caddr_t) sc->arpcom.ac_enaddr,
sizeof(sc->arpcom.ac_enaddr));
}
/*
* Set new address
*/
fxp_init(ifp);
break;
}
#endif
default:
fxp_init(ifp);
break;
}
break;
case SIOCGIFADDR:
{
struct sockaddr *sa;
sa = (struct sockaddr *) & ifr->ifr_data;
bcopy((caddr_t) sc->arpcom.ac_enaddr,
(caddr_t) sa->sa_data, sizeof(sc->arpcom.ac_enaddr));
}
break;
case SIOCSIFFLAGS:
/*
* If interface is marked up and not running, then start it.
* If it is marked down and running, stop it.
* XXX If it's up then re-initialize it. This is so flags
* such as IFF_PROMISC are handled.
*/
if (ifp->if_flags & IFF_UP) {
fxp_init(ifp);
} else {
if (ifp->if_flags & IFF_RUNNING)
fxp_stop(sc);
}
break;
case SIOCADDMULTI:
case SIOCDELMULTI:
/*
* Update out multicast list.
*/
error = (command == SIOCADDMULTI) ?
ether_addmulti(ifr, &sc->arpcom) :
ether_delmulti(ifr, &sc->arpcom);
if (error == ENETRESET) {
/*
* Multicast list has changed; set the hardware filter
* accordingly.
*/
fxp_init(ifp);
error = 0;
}
break;
case SIOCSIFMTU:
/*
* Set the interface MTU.
*/
if (ifr->ifr_mtu > ETHERMTU) {
error = EINVAL;
} else {
ifp->if_mtu = ifr->ifr_mtu;
}
break;
default:
error = EINVAL;
}
(void) splx(s);
return (error);
}
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