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/* $NetBSD: i82557.c,v 1.61 2001/11/13 13:14:38 lukem Exp $ */
/*-
* Copyright (c) 1997, 1998, 1999, 2001 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Jason R. Thorpe of the Numerical Aerospace Simulation Facility,
* NASA Ames Research Center.
*
* 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.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the NetBSD
* Foundation, Inc. and its contributors.
* 4. Neither the name of The NetBSD Foundation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. 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 FOUNDATION 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.
*/
/*
* Copyright (c) 1995, David Greenman
* Copyright (c) 2001 Jonathan Lemon <jlemon@freebsd.org>
* 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 1.113 2001/05/17 23:50:24 jlemon
*/
/*
* Device driver for the Intel i82557 fast Ethernet controller,
* and its successors, the i82558 and i82559.
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: i82557.c,v 1.61 2001/11/13 13:14:38 lukem Exp $");
#include "bpfilter.h"
#include "rnd.h"
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/callout.h>
#include <sys/mbuf.h>
#include <sys/malloc.h>
#include <sys/kernel.h>
#include <sys/socket.h>
#include <sys/ioctl.h>
#include <sys/errno.h>
#include <sys/device.h>
#include <machine/endian.h>
#include <uvm/uvm_extern.h>
#if NRND > 0
#include <sys/rnd.h>
#endif
#include <net/if.h>
#include <net/if_dl.h>
#include <net/if_media.h>
#include <net/if_ether.h>
#if NBPFILTER > 0
#include <net/bpf.h>
#endif
#include <machine/bus.h>
#include <machine/intr.h>
#include <dev/mii/miivar.h>
#include <dev/ic/i82557reg.h>
#include <dev/ic/i82557var.h>
/*
* NOTE! On the Alpha, we have an alignment constraint. The
* card DMAs the packet immediately following the RFA. However,
* the first thing in the packet is a 14-byte Ethernet header.
* This means that the packet is misaligned. To compensate,
* we actually offset the RFA 2 bytes into the cluster. This
* alignes the packet after the Ethernet header at a 32-bit
* boundary. HOWEVER! This means that the RFA is misaligned!
*/
#define RFA_ALIGNMENT_FUDGE 2
/*
* The configuration byte map has several undefined fields which
* must be one or must be zero. Set up a template for these bits
* only (assuming an i82557 chip), leaving the actual configuration
* for fxp_init().
*
* See the definition of struct fxp_cb_config for the bit definitions.
*/
const u_int8_t fxp_cb_config_template[] = {
0x0, 0x0, /* cb_status */
0x0, 0x0, /* cb_command */
0x0, 0x0, 0x0, 0x0, /* link_addr */
0x0, /* 0 */
0x0, /* 1 */
0x0, /* 2 */
0x0, /* 3 */
0x0, /* 4 */
0x0, /* 5 */
0x32, /* 6 */
0x0, /* 7 */
0x0, /* 8 */
0x0, /* 9 */
0x6, /* 10 */
0x0, /* 11 */
0x0, /* 12 */
0x0, /* 13 */
0xf2, /* 14 */
0x48, /* 15 */
0x0, /* 16 */
0x40, /* 17 */
0xf0, /* 18 */
0x0, /* 19 */
0x3f, /* 20 */
0x5, /* 21 */
0x0, /* 22 */
0x0, /* 23 */
0x0, /* 24 */
0x0, /* 25 */
0x0, /* 26 */
0x0, /* 27 */
0x0, /* 28 */
0x0, /* 29 */
0x0, /* 30 */
0x0, /* 31 */
};
void fxp_mii_initmedia(struct fxp_softc *);
int fxp_mii_mediachange(struct ifnet *);
void fxp_mii_mediastatus(struct ifnet *, struct ifmediareq *);
void fxp_80c24_initmedia(struct fxp_softc *);
int fxp_80c24_mediachange(struct ifnet *);
void fxp_80c24_mediastatus(struct ifnet *, struct ifmediareq *);
void fxp_start(struct ifnet *);
int fxp_ioctl(struct ifnet *, u_long, caddr_t);
void fxp_watchdog(struct ifnet *);
int fxp_init(struct ifnet *);
void fxp_stop(struct ifnet *, int);
void fxp_txintr(struct fxp_softc *);
void fxp_rxintr(struct fxp_softc *);
void fxp_rxdrain(struct fxp_softc *);
int fxp_add_rfabuf(struct fxp_softc *, bus_dmamap_t, int);
int fxp_mdi_read(struct device *, int, int);
void fxp_statchg(struct device *);
void fxp_mdi_write(struct device *, int, int, int);
void fxp_autosize_eeprom(struct fxp_softc*);
void fxp_read_eeprom(struct fxp_softc *, u_int16_t *, int, int);
void fxp_get_info(struct fxp_softc *, u_int8_t *);
void fxp_tick(void *);
void fxp_mc_setup(struct fxp_softc *);
void fxp_shutdown(void *);
void fxp_power(int, void *);
int fxp_copy_small = 0;
struct fxp_phytype {
int fp_phy; /* type of PHY, -1 for MII at the end. */
void (*fp_init)(struct fxp_softc *);
} fxp_phytype_table[] = {
{ FXP_PHY_80C24, fxp_80c24_initmedia },
{ -1, fxp_mii_initmedia },
};
/*
* 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;
/*
* Wait for the previous command to be accepted (but not necessarily
* completed).
*/
static __inline void
fxp_scb_wait(struct fxp_softc *sc)
{
int i = 10000;
while (CSR_READ_1(sc, FXP_CSR_SCB_COMMAND) && --i)
delay(2);
if (i == 0)
printf("%s: WARNING: SCB timed out!\n", sc->sc_dev.dv_xname);
}
/*
* Submit a command to the i82557.
*/
static __inline void
fxp_scb_cmd(struct fxp_softc *sc, u_int8_t cmd)
{
if (cmd == FXP_SCB_COMMAND_CU_RESUME &&
(sc->sc_flags & FXPF_FIX_RESUME_BUG) != 0) {
CSR_WRITE_1(sc, FXP_CSR_SCB_COMMAND, FXP_SCB_COMMAND_CU_NOP);
fxp_scb_wait(sc);
}
CSR_WRITE_1(sc, FXP_CSR_SCB_COMMAND, cmd);
}
/*
* Finish attaching an i82557 interface. Called by bus-specific front-end.
*/
void
fxp_attach(struct fxp_softc *sc)
{
u_int8_t enaddr[ETHER_ADDR_LEN];
struct ifnet *ifp;
bus_dma_segment_t seg;
int rseg, i, error;
struct fxp_phytype *fp;
callout_init(&sc->sc_callout);
/* Start out using the standard RFA. */
sc->sc_rfa_size = RFA_SIZE;
/*
* Enable some good stuff on i82558 and later.
*/
if (sc->sc_rev >= FXP_REV_82558_A4) {
/* Enable the extended TxCB. */
sc->sc_flags |= FXPF_EXT_TXCB;
}
/*
* Allocate the control data structures, and create and load the
* DMA map for it.
*/
if ((error = bus_dmamem_alloc(sc->sc_dmat,
sizeof(struct fxp_control_data), PAGE_SIZE, 0, &seg, 1, &rseg,
0)) != 0) {
printf("%s: unable to allocate control data, error = %d\n",
sc->sc_dev.dv_xname, error);
goto fail_0;
}
if ((error = bus_dmamem_map(sc->sc_dmat, &seg, rseg,
sizeof(struct fxp_control_data), (caddr_t *)&sc->sc_control_data,
BUS_DMA_COHERENT)) != 0) {
printf("%s: unable to map control data, error = %d\n",
sc->sc_dev.dv_xname, error);
goto fail_1;
}
sc->sc_cdseg = seg;
sc->sc_cdnseg = rseg;
memset(sc->sc_control_data, 0, sizeof(struct fxp_control_data));
if ((error = bus_dmamap_create(sc->sc_dmat,
sizeof(struct fxp_control_data), 1,
sizeof(struct fxp_control_data), 0, 0, &sc->sc_dmamap)) != 0) {
printf("%s: unable to create control data DMA map, "
"error = %d\n", sc->sc_dev.dv_xname, error);
goto fail_2;
}
if ((error = bus_dmamap_load(sc->sc_dmat, sc->sc_dmamap,
sc->sc_control_data, sizeof(struct fxp_control_data), NULL,
0)) != 0) {
printf("%s: can't load control data DMA map, error = %d\n",
sc->sc_dev.dv_xname, error);
goto fail_3;
}
/*
* Create the transmit buffer DMA maps.
*/
for (i = 0; i < FXP_NTXCB; i++) {
if ((error = bus_dmamap_create(sc->sc_dmat, MCLBYTES,
FXP_NTXSEG, MCLBYTES, 0, 0,
&FXP_DSTX(sc, i)->txs_dmamap)) != 0) {
printf("%s: unable to create tx DMA map %d, "
"error = %d\n", sc->sc_dev.dv_xname, i, error);
goto fail_4;
}
}
/*
* Create the receive buffer DMA maps.
*/
for (i = 0; i < FXP_NRFABUFS; i++) {
if ((error = bus_dmamap_create(sc->sc_dmat, MCLBYTES, 1,
MCLBYTES, 0, 0, &sc->sc_rxmaps[i])) != 0) {
printf("%s: unable to create rx DMA map %d, "
"error = %d\n", sc->sc_dev.dv_xname, i, error);
goto fail_5;
}
}
/* Initialize MAC address and media structures. */
fxp_get_info(sc, enaddr);
printf("%s: Ethernet address %s\n", sc->sc_dev.dv_xname,
ether_sprintf(enaddr));
ifp = &sc->sc_ethercom.ec_if;
/*
* Get info about our media interface, and initialize it. Note
* the table terminates itself with a phy of -1, indicating
* that we're using MII.
*/
for (fp = fxp_phytype_table; fp->fp_phy != -1; fp++)
if (fp->fp_phy == sc->phy_primary_device)
break;
(*fp->fp_init)(sc);
strcpy(ifp->if_xname, sc->sc_dev.dv_xname);
ifp->if_softc = sc;
ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST;
ifp->if_ioctl = fxp_ioctl;
ifp->if_start = fxp_start;
ifp->if_watchdog = fxp_watchdog;
ifp->if_init = fxp_init;
ifp->if_stop = fxp_stop;
IFQ_SET_READY(&ifp->if_snd);
/*
* We can support 802.1Q VLAN-sized frames.
*/
sc->sc_ethercom.ec_capabilities |= ETHERCAP_VLAN_MTU;
/*
* Attach the interface.
*/
if_attach(ifp);
ether_ifattach(ifp, enaddr);
#if NRND > 0
rnd_attach_source(&sc->rnd_source, sc->sc_dev.dv_xname,
RND_TYPE_NET, 0);
#endif
#ifdef FXP_EVENT_COUNTERS
evcnt_attach_dynamic(&sc->sc_ev_txstall, EVCNT_TYPE_MISC,
NULL, sc->sc_dev.dv_xname, "txstall");
evcnt_attach_dynamic(&sc->sc_ev_txintr, EVCNT_TYPE_INTR,
NULL, sc->sc_dev.dv_xname, "txintr");
evcnt_attach_dynamic(&sc->sc_ev_rxintr, EVCNT_TYPE_INTR,
NULL, sc->sc_dev.dv_xname, "rxintr");
#endif /* FXP_EVENT_COUNTERS */
/*
* 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.
*/
sc->sc_sdhook = shutdownhook_establish(fxp_shutdown, sc);
if (sc->sc_sdhook == NULL)
printf("%s: WARNING: unable to establish shutdown hook\n",
sc->sc_dev.dv_xname);
/*
* Add suspend hook, for similar reasons..
*/
sc->sc_powerhook = powerhook_establish(fxp_power, sc);
if (sc->sc_powerhook == NULL)
printf("%s: WARNING: unable to establish power hook\n",
sc->sc_dev.dv_xname);
/* The attach is successful. */
sc->sc_flags |= FXPF_ATTACHED;
return;
/*
* Free any resources we've allocated during the failed attach
* attempt. Do this in reverse order and fall though.
*/
fail_5:
for (i = 0; i < FXP_NRFABUFS; i++) {
if (sc->sc_rxmaps[i] != NULL)
bus_dmamap_destroy(sc->sc_dmat, sc->sc_rxmaps[i]);
}
fail_4:
for (i = 0; i < FXP_NTXCB; i++) {
if (FXP_DSTX(sc, i)->txs_dmamap != NULL)
bus_dmamap_destroy(sc->sc_dmat,
FXP_DSTX(sc, i)->txs_dmamap);
}
bus_dmamap_unload(sc->sc_dmat, sc->sc_dmamap);
fail_3:
bus_dmamap_destroy(sc->sc_dmat, sc->sc_dmamap);
fail_2:
bus_dmamem_unmap(sc->sc_dmat, (caddr_t)sc->sc_control_data,
sizeof(struct fxp_control_data));
fail_1:
bus_dmamem_free(sc->sc_dmat, &seg, rseg);
fail_0:
return;
}
void
fxp_mii_initmedia(struct fxp_softc *sc)
{
int flags;
sc->sc_flags |= FXPF_MII;
sc->sc_mii.mii_ifp = &sc->sc_ethercom.ec_if;
sc->sc_mii.mii_readreg = fxp_mdi_read;
sc->sc_mii.mii_writereg = fxp_mdi_write;
sc->sc_mii.mii_statchg = fxp_statchg;
ifmedia_init(&sc->sc_mii.mii_media, 0, fxp_mii_mediachange,
fxp_mii_mediastatus);
flags = MIIF_NOISOLATE;
if (sc->sc_rev >= FXP_REV_82558_A4)
flags |= MIIF_DOPAUSE;
/*
* The i82557 wedges if all of its PHYs are isolated!
*/
mii_attach(&sc->sc_dev, &sc->sc_mii, 0xffffffff, MII_PHY_ANY,
MII_OFFSET_ANY, flags);
if (LIST_FIRST(&sc->sc_mii.mii_phys) == NULL) {
ifmedia_add(&sc->sc_mii.mii_media, IFM_ETHER|IFM_NONE, 0, NULL);
ifmedia_set(&sc->sc_mii.mii_media, IFM_ETHER|IFM_NONE);
} else
ifmedia_set(&sc->sc_mii.mii_media, IFM_ETHER|IFM_AUTO);
}
void
fxp_80c24_initmedia(struct fxp_softc *sc)
{
/*
* The Seeq 80c24 AutoDUPLEX(tm) Ethernet Interface Adapter
* doesn't have a programming interface of any sort. The
* media is sensed automatically based on how the link partner
* is configured. This is, in essence, manual configuration.
*/
printf("%s: Seeq 80c24 AutoDUPLEX media interface present\n",
sc->sc_dev.dv_xname);
ifmedia_init(&sc->sc_mii.mii_media, 0, fxp_80c24_mediachange,
fxp_80c24_mediastatus);
ifmedia_add(&sc->sc_mii.mii_media, IFM_ETHER|IFM_MANUAL, 0, NULL);
ifmedia_set(&sc->sc_mii.mii_media, IFM_ETHER|IFM_MANUAL);
}
/*
* 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.
*/
void
fxp_shutdown(void *arg)
{
struct fxp_softc *sc = arg;
/*
* Since the system's going to halt shortly, don't bother
* freeing mbufs.
*/
fxp_stop(&sc->sc_ethercom.ec_if, 0);
}
/*
* Power handler routine. Called when the system is transitioning
* into/out of power save modes. As with fxp_shutdown, the main
* purpose of this routine is to shut off receiver DMA so it doesn't
* clobber kernel memory at the wrong time.
*/
void
fxp_power(int why, void *arg)
{
struct fxp_softc *sc = arg;
struct ifnet *ifp = &sc->sc_ethercom.ec_if;
int s;
s = splnet();
switch (why) {
case PWR_SUSPEND:
case PWR_STANDBY:
fxp_stop(ifp, 0);
break;
case PWR_RESUME:
if (ifp->if_flags & IFF_UP)
fxp_init(ifp);
break;
case PWR_SOFTSUSPEND:
case PWR_SOFTSTANDBY:
case PWR_SOFTRESUME:
break;
}
splx(s);
}
/*
* Initialize the interface media.
*/
void
fxp_get_info(struct fxp_softc *sc, u_int8_t *enaddr)
{
u_int16_t data, myea[ETHER_ADDR_LEN / 2];
/*
* Reset to a stable state.
*/
CSR_WRITE_4(sc, FXP_CSR_PORT, FXP_PORT_SELECTIVE_RESET);
DELAY(10);
sc->sc_eeprom_size = 0;
fxp_autosize_eeprom(sc);
if(sc->sc_eeprom_size == 0) {
printf("%s: failed to detect EEPROM size\n", sc->sc_dev.dv_xname);
sc->sc_eeprom_size = 6; /* XXX panic here? */
}
#ifdef DEBUG
printf("%s: detected %d word EEPROM\n",
sc->sc_dev.dv_xname,
1 << sc->sc_eeprom_size);
#endif
/*
* Get info about the primary PHY
*/
fxp_read_eeprom(sc, &data, 6, 1);
sc->phy_primary_device =
(data & FXP_PHY_DEVICE_MASK) >> FXP_PHY_DEVICE_SHIFT;
/*
* Read MAC address.
*/
fxp_read_eeprom(sc, myea, 0, 3);
enaddr[0] = myea[0] & 0xff;
enaddr[1] = myea[0] >> 8;
enaddr[2] = myea[1] & 0xff;
enaddr[3] = myea[1] >> 8;
enaddr[4] = myea[2] & 0xff;
enaddr[5] = myea[2] >> 8;
}
/*
* Figure out EEPROM size.
*
* 559's can have either 64-word or 256-word EEPROMs, the 558
* datasheet only talks about 64-word EEPROMs, and the 557 datasheet
* talks about the existance of 16 to 256 word EEPROMs.
*
* The only known sizes are 64 and 256, where the 256 version is used
* by CardBus cards to store CIS information.
*
* The address is shifted in msb-to-lsb, and after the last
* address-bit the EEPROM is supposed to output a `dummy zero' bit,
* after which follows the actual data. We try to detect this zero, by
* probing the data-out bit in the EEPROM control register just after
* having shifted in a bit. If the bit is zero, we assume we've
* shifted enough address bits. The data-out should be tri-state,
* before this, which should translate to a logical one.
*
* Other ways to do this would be to try to read a register with known
* contents with a varying number of address bits, but no such
* register seem to be available. The high bits of register 10 are 01
* on the 558 and 559, but apparently not on the 557.
*
* The Linux driver computes a checksum on the EEPROM data, but the
* value of this checksum is not very well documented.
*/
void
fxp_autosize_eeprom(struct fxp_softc *sc)
{
u_int16_t reg;
int x;
CSR_WRITE_2(sc, FXP_CSR_EEPROMCONTROL, FXP_EEPROM_EECS);
/*
* Shift in read opcode.
*/
for (x = 3; x > 0; x--) {
if (FXP_EEPROM_OPC_READ & (1 << (x - 1))) {
reg = FXP_EEPROM_EECS | FXP_EEPROM_EEDI;
} else {
reg = FXP_EEPROM_EECS;
}
CSR_WRITE_2(sc, FXP_CSR_EEPROMCONTROL, reg);
CSR_WRITE_2(sc, FXP_CSR_EEPROMCONTROL,
reg | FXP_EEPROM_EESK);
DELAY(4);
CSR_WRITE_2(sc, FXP_CSR_EEPROMCONTROL, reg);
DELAY(4);
}
/*
* Shift in address, wait for the dummy zero following a correct
* address shift.
*/
for (x = 1; x <= 8; x++) {
CSR_WRITE_2(sc, FXP_CSR_EEPROMCONTROL, FXP_EEPROM_EECS);
CSR_WRITE_2(sc, FXP_CSR_EEPROMCONTROL,
FXP_EEPROM_EECS | FXP_EEPROM_EESK);
DELAY(4);
if((CSR_READ_2(sc, FXP_CSR_EEPROMCONTROL) &
FXP_EEPROM_EEDO) == 0)
break;
CSR_WRITE_2(sc, FXP_CSR_EEPROMCONTROL, FXP_EEPROM_EECS);
DELAY(4);
}
CSR_WRITE_2(sc, FXP_CSR_EEPROMCONTROL, 0);
DELAY(4);
if(x != 6 && x != 8) {
#ifdef DEBUG
printf("%s: strange EEPROM size (%d)\n",
sc->sc_dev.dv_xname, 1 << x);
#endif
} else
sc->sc_eeprom_size = x;
}
/*
* Read from the serial EEPROM. Basically, you manually shift in
* the read opcode (one bit at a time) and then shift in the address,
* and then you shift out the data (all of this one bit at a time).
* The word size is 16 bits, so you have to provide the address for
* every 16 bits of data.
*/
void
fxp_read_eeprom(struct fxp_softc *sc, u_int16_t *data, int offset, int words)
{
u_int16_t reg;
int i, x;
for (i = 0; i < words; i++) {
CSR_WRITE_2(sc, FXP_CSR_EEPROMCONTROL, FXP_EEPROM_EECS);
/*
* Shift in read opcode.
*/
for (x = 3; x > 0; x--) {
if (FXP_EEPROM_OPC_READ & (1 << (x - 1))) {
reg = FXP_EEPROM_EECS | FXP_EEPROM_EEDI;
} else {
reg = FXP_EEPROM_EECS;
}
CSR_WRITE_2(sc, FXP_CSR_EEPROMCONTROL, reg);
CSR_WRITE_2(sc, FXP_CSR_EEPROMCONTROL,
reg | FXP_EEPROM_EESK);
DELAY(4);
CSR_WRITE_2(sc, FXP_CSR_EEPROMCONTROL, reg);
DELAY(4);
}
/*
* Shift in address.
*/
for (x = sc->sc_eeprom_size; x > 0; x--) {
if ((i + offset) & (1 << (x - 1))) {
reg = FXP_EEPROM_EECS | FXP_EEPROM_EEDI;
} else {
reg = FXP_EEPROM_EECS;
}
CSR_WRITE_2(sc, FXP_CSR_EEPROMCONTROL, reg);
CSR_WRITE_2(sc, FXP_CSR_EEPROMCONTROL,
reg | FXP_EEPROM_EESK);
DELAY(4);
CSR_WRITE_2(sc, FXP_CSR_EEPROMCONTROL, reg);
DELAY(4);
}
reg = FXP_EEPROM_EECS;
data[i] = 0;
/*
* Shift out data.
*/
for (x = 16; x > 0; x--) {
CSR_WRITE_2(sc, FXP_CSR_EEPROMCONTROL,
reg | FXP_EEPROM_EESK);
DELAY(4);
if (CSR_READ_2(sc, FXP_CSR_EEPROMCONTROL) &
FXP_EEPROM_EEDO)
data[i] |= (1 << (x - 1));
CSR_WRITE_2(sc, FXP_CSR_EEPROMCONTROL, reg);
DELAY(4);
}
CSR_WRITE_2(sc, FXP_CSR_EEPROMCONTROL, 0);
DELAY(4);
}
}
/*
* Start packet transmission on the interface.
*/
void
fxp_start(struct ifnet *ifp)
{
struct fxp_softc *sc = ifp->if_softc;
struct mbuf *m0, *m;
struct fxp_txdesc *txd;
struct fxp_txsoft *txs;
bus_dmamap_t dmamap;
int error, lasttx, nexttx, opending, seg;
/*
* If we want a re-init, bail out now.
*/
if (sc->sc_flags & FXPF_WANTINIT) {
ifp->if_flags |= IFF_OACTIVE;
return;
}
if ((ifp->if_flags & (IFF_RUNNING|IFF_OACTIVE)) != IFF_RUNNING)
return;
/*
* Remember the previous txpending and the current lasttx.
*/
opending = sc->sc_txpending;
lasttx = sc->sc_txlast;
/*
* Loop through the send queue, setting up transmit descriptors
* until we drain the queue, or use up all available transmit
* descriptors.
*/
for (;;) {
/*
* Grab a packet off the queue.
*/
IFQ_POLL(&ifp->if_snd, m0);
if (m0 == NULL)
break;
m = NULL;
if (sc->sc_txpending == FXP_NTXCB) {
FXP_EVCNT_INCR(&sc->sc_ev_txstall);
break;
}
/*
* Get the next available transmit descriptor.
*/
nexttx = FXP_NEXTTX(sc->sc_txlast);
txd = FXP_CDTX(sc, nexttx);
txs = FXP_DSTX(sc, nexttx);
dmamap = txs->txs_dmamap;
/*
* Load the DMA map. If this fails, the packet either
* didn't fit in the allotted number of frags, or we were
* short on resources. In this case, we'll copy and try
* again.
*/
if (bus_dmamap_load_mbuf(sc->sc_dmat, dmamap, m0,
BUS_DMA_WRITE|BUS_DMA_NOWAIT) != 0) {
MGETHDR(m, M_DONTWAIT, MT_DATA);
if (m == NULL) {
printf("%s: unable to allocate Tx mbuf\n",
sc->sc_dev.dv_xname);
break;
}
if (m0->m_pkthdr.len > MHLEN) {
MCLGET(m, M_DONTWAIT);
if ((m->m_flags & M_EXT) == 0) {
printf("%s: unable to allocate Tx "
"cluster\n", sc->sc_dev.dv_xname);
m_freem(m);
break;
}
}
m_copydata(m0, 0, m0->m_pkthdr.len, mtod(m, caddr_t));
m->m_pkthdr.len = m->m_len = m0->m_pkthdr.len;
error = bus_dmamap_load_mbuf(sc->sc_dmat, dmamap,
m, BUS_DMA_WRITE|BUS_DMA_NOWAIT);
if (error) {
printf("%s: unable to load Tx buffer, "
"error = %d\n", sc->sc_dev.dv_xname, error);
break;
}
}
IFQ_DEQUEUE(&ifp->if_snd, m0);
if (m != NULL) {
m_freem(m0);
m0 = m;
}
/* Initialize the fraglist. */
for (seg = 0; seg < dmamap->dm_nsegs; seg++) {
txd->txd_tbd[seg].tb_addr =
htole32(dmamap->dm_segs[seg].ds_addr);
txd->txd_tbd[seg].tb_size =
htole32(dmamap->dm_segs[seg].ds_len);
}
/* Sync the DMA map. */
bus_dmamap_sync(sc->sc_dmat, dmamap, 0, dmamap->dm_mapsize,
BUS_DMASYNC_PREWRITE);
/*
* Store a pointer to the packet so we can free it later.
*/
txs->txs_mbuf = m0;
/*
* Initialize the transmit descriptor.
*/
/* BIG_ENDIAN: no need to swap to store 0 */
txd->txd_txcb.cb_status = 0;
txd->txd_txcb.cb_command =
htole16(FXP_CB_COMMAND_XMIT | FXP_CB_COMMAND_SF);
txd->txd_txcb.tx_threshold = tx_threshold;
txd->txd_txcb.tbd_number = dmamap->dm_nsegs;
FXP_CDTXSYNC(sc, nexttx,
BUS_DMASYNC_PREREAD|BUS_DMASYNC_PREWRITE);
/* Advance the tx pointer. */
sc->sc_txpending++;
sc->sc_txlast = nexttx;
#if NBPFILTER > 0
/*
* Pass packet to bpf if there is a listener.
*/
if (ifp->if_bpf)
bpf_mtap(ifp->if_bpf, m0);
#endif
}
if (sc->sc_txpending == FXP_NTXCB) {
/* No more slots; notify upper layer. */
ifp->if_flags |= IFF_OACTIVE;
}
if (sc->sc_txpending != opending) {
/*
* We enqueued packets. If the transmitter was idle,
* reset the txdirty pointer.
*/
if (opending == 0)
sc->sc_txdirty = FXP_NEXTTX(lasttx);
/*
* Cause the chip to interrupt and suspend command
* processing once the last packet we've enqueued
* has been transmitted.
*/
FXP_CDTX(sc, sc->sc_txlast)->txd_txcb.cb_command |=
htole16(FXP_CB_COMMAND_I | FXP_CB_COMMAND_S);
FXP_CDTXSYNC(sc, sc->sc_txlast,
BUS_DMASYNC_PREREAD|BUS_DMASYNC_PREWRITE);
/*
* The entire packet chain is set up. Clear the suspend bit
* on the command prior to the first packet we set up.
*/
FXP_CDTXSYNC(sc, lasttx,
BUS_DMASYNC_POSTREAD|BUS_DMASYNC_POSTWRITE);
FXP_CDTX(sc, lasttx)->txd_txcb.cb_command &=
htole16(~FXP_CB_COMMAND_S);
FXP_CDTXSYNC(sc, lasttx,
BUS_DMASYNC_PREREAD|BUS_DMASYNC_PREWRITE);
/*
* Issue a Resume command in case the chip was suspended.
*/
fxp_scb_wait(sc);
fxp_scb_cmd(sc, FXP_SCB_COMMAND_CU_RESUME);
/* Set a watchdog timer in case the chip flakes out. */
ifp->if_timer = 5;
}
}
/*
* Process interface interrupts.
*/
int
fxp_intr(void *arg)
{
struct fxp_softc *sc = arg;
struct ifnet *ifp = &sc->sc_ethercom.ec_if;
bus_dmamap_t rxmap;
int claimed = 0;
u_int8_t statack;
if ((sc->sc_dev.dv_flags & DVF_ACTIVE) == 0)
return (0);
/*
* If the interface isn't running, don't try to
* service the interrupt.. just ack it and bail.
*/
if ((ifp->if_flags & IFF_RUNNING) == 0) {
statack = CSR_READ_1(sc, FXP_CSR_SCB_STATACK);
if (statack) {
claimed = 1;
CSR_WRITE_1(sc, FXP_CSR_SCB_STATACK, statack);
}
return (claimed);
}
while ((statack = CSR_READ_1(sc, FXP_CSR_SCB_STATACK)) != 0) {
claimed = 1;
/*
* First ACK all the interrupts in this pass.
*/
CSR_WRITE_1(sc, FXP_CSR_SCB_STATACK, statack);
/*
* 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)) {
FXP_EVCNT_INCR(&sc->sc_ev_rxintr);
fxp_rxintr(sc);
}
if (statack & FXP_SCB_STATACK_RNR) {
rxmap = M_GETCTX(sc->sc_rxq.ifq_head, bus_dmamap_t);
fxp_scb_wait(sc);
CSR_WRITE_4(sc, FXP_CSR_SCB_GENERAL,
rxmap->dm_segs[0].ds_addr +
RFA_ALIGNMENT_FUDGE);
fxp_scb_cmd(sc, FXP_SCB_COMMAND_RU_START);
}
/*
* Free any finished transmit mbuf chains.
*/
if (statack & (FXP_SCB_STATACK_CXTNO|FXP_SCB_STATACK_CNA)) {
FXP_EVCNT_INCR(&sc->sc_ev_txintr);
fxp_txintr(sc);
/*
* Try to get more packets going.
*/
fxp_start(ifp);
if (sc->sc_txpending == 0) {
/*
* If we want a re-init, do that now.
*/
if (sc->sc_flags & FXPF_WANTINIT)
(void) fxp_init(ifp);
}
}
}
#if NRND > 0
if (claimed)
rnd_add_uint32(&sc->rnd_source, statack);
#endif
return (claimed);
}
/*
* Handle transmit completion interrupts.
*/
void
fxp_txintr(struct fxp_softc *sc)
{
struct ifnet *ifp = &sc->sc_ethercom.ec_if;
struct fxp_txdesc *txd;
struct fxp_txsoft *txs;
int i;
u_int16_t txstat;
ifp->if_flags &= ~IFF_OACTIVE;
for (i = sc->sc_txdirty; sc->sc_txpending != 0;
i = FXP_NEXTTX(i), sc->sc_txpending--) {
txd = FXP_CDTX(sc, i);
txs = FXP_DSTX(sc, i);
FXP_CDTXSYNC(sc, i,
BUS_DMASYNC_POSTREAD|BUS_DMASYNC_POSTWRITE);
txstat = le16toh(txd->txd_txcb.cb_status);
if ((txstat & FXP_CB_STATUS_C) == 0)
break;
bus_dmamap_sync(sc->sc_dmat, txs->txs_dmamap,
0, txs->txs_dmamap->dm_mapsize,
BUS_DMASYNC_POSTWRITE);
bus_dmamap_unload(sc->sc_dmat, txs->txs_dmamap);
m_freem(txs->txs_mbuf);
txs->txs_mbuf = NULL;
}
/* Update the dirty transmit buffer pointer. */
sc->sc_txdirty = i;
/*
* Cancel the watchdog timer if there are no pending
* transmissions.
*/
if (sc->sc_txpending == 0)
ifp->if_timer = 0;
}
/*
* Handle receive interrupts.
*/
void
fxp_rxintr(struct fxp_softc *sc)
{
struct ethercom *ec = &sc->sc_ethercom;
struct ifnet *ifp = &sc->sc_ethercom.ec_if;
struct mbuf *m, *m0;
bus_dmamap_t rxmap;
struct fxp_rfa *rfa;
u_int16_t len, rxstat;
for (;;) {
m = sc->sc_rxq.ifq_head;
rfa = FXP_MTORFA(m);
rxmap = M_GETCTX(m, bus_dmamap_t);
FXP_RFASYNC(sc, m,
BUS_DMASYNC_POSTREAD|BUS_DMASYNC_POSTWRITE);
rxstat = le16toh(rfa->rfa_status);
if ((rxstat & FXP_RFA_STATUS_C) == 0) {
/*
* We have processed all of the
* receive buffers.
*/
FXP_RFASYNC(sc, m, BUS_DMASYNC_PREREAD);
return;
}
IF_DEQUEUE(&sc->sc_rxq, m);
FXP_RXBUFSYNC(sc, m, BUS_DMASYNC_POSTREAD);
len = le16toh(rfa->actual_size) &
(m->m_ext.ext_size - 1);
if (len < sizeof(struct ether_header)) {
/*
* Runt packet; drop it now.
*/
FXP_INIT_RFABUF(sc, m);
continue;
}
/*
* If support for 802.1Q VLAN sized frames is
* enabled, we need to do some additional error
* checking (as we are saving bad frames, in
* order to receive the larger ones).
*/
if ((ec->ec_capenable & ETHERCAP_VLAN_MTU) != 0 &&
(rxstat & (FXP_RFA_STATUS_OVERRUN|
FXP_RFA_STATUS_RNR|
FXP_RFA_STATUS_ALIGN|
FXP_RFA_STATUS_CRC)) != 0) {
FXP_INIT_RFABUF(sc, m);
continue;
}
/*
* If the packet is small enough to fit in a
* single header mbuf, allocate one and copy
* the data into it. This greatly reduces
* memory consumption when we receive lots
* of small packets.
*
* Otherwise, we add a new buffer to the receive
* chain. If this fails, we drop the packet and
* recycle the old buffer.
*/
if (fxp_copy_small != 0 && len <= MHLEN) {
MGETHDR(m0, M_DONTWAIT, MT_DATA);
if (m == NULL)
goto dropit;
memcpy(mtod(m0, caddr_t),
mtod(m, caddr_t), len);
FXP_INIT_RFABUF(sc, m);
m = m0;
} else {
if (fxp_add_rfabuf(sc, rxmap, 1) != 0) {
dropit:
ifp->if_ierrors++;
FXP_INIT_RFABUF(sc, m);
continue;
}
}
m->m_pkthdr.rcvif = ifp;
m->m_pkthdr.len = m->m_len = len;
#if NBPFILTER > 0
/*
* Pass this up to any BPF listeners, but only
* pass it up the stack it its for us.
*/
if (ifp->if_bpf)
bpf_mtap(ifp->if_bpf, m);
#endif
/* Pass it on. */
(*ifp->if_input)(ifp, m);
}
}
/*
* 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_tick(void *arg)
{
struct fxp_softc *sc = arg;
struct ifnet *ifp = &sc->sc_ethercom.ec_if;
struct fxp_stats *sp = &sc->sc_control_data->fcd_stats;
int s;
if ((sc->sc_dev.dv_flags & DVF_ACTIVE) == 0)
return;
s = splnet();
FXP_CDSTATSSYNC(sc, BUS_DMASYNC_POSTREAD);
ifp->if_opackets += le32toh(sp->tx_good);
ifp->if_collisions += le32toh(sp->tx_total_collisions);
if (sp->rx_good) {
ifp->if_ipackets += le32toh(sp->rx_good);
sc->sc_rxidle = 0;
} else {
sc->sc_rxidle++;
}
ifp->if_ierrors +=
le32toh(sp->rx_crc_errors) +
le32toh(sp->rx_alignment_errors) +
le32toh(sp->rx_rnr_errors) +
le32toh(sp->rx_overrun_errors);
/*
* If any transmit underruns occurred, bump up the transmit
* threshold by another 512 bytes (64 * 8).
*/
if (sp->tx_underruns) {
ifp->if_oerrors += le32toh(sp->tx_underruns);
if (tx_threshold < 192)
tx_threshold += 64;
}
/*
* If we haven't received any packets in FXP_MAC_RX_IDLE seconds,
* then assume the receiver has locked up and attempt to clear
* the condition by reprogramming the multicast filter (actually,
* resetting the interface). This is a work-around for a bug in
* the 82557 where the receiver locks up if it gets certain types
* of garbage in the syncronization bits prior to the packet header.
* This bug is supposed to only occur in 10Mbps mode, but has been
* seen to occur in 100Mbps mode as well (perhaps due to a 10/100
* speed transition).
*/
if (sc->sc_rxidle > FXP_MAX_RX_IDLE) {
(void) fxp_init(ifp);
splx(s);
return;
}
/*
* If there is no pending command, start another stats
* dump. Otherwise punt for now.
*/
if (CSR_READ_1(sc, FXP_CSR_SCB_COMMAND) == 0) {
/*
* Start another stats dump.
*/
FXP_CDSTATSSYNC(sc, BUS_DMASYNC_PREREAD);
fxp_scb_cmd(sc, FXP_SCB_COMMAND_CU_DUMPRESET);
} else {
/*
* A previous command is still waiting to be accepted.
* Just zero our copy of the stats and wait for the
* next timer event to update them.
*/
/* BIG_ENDIAN: no swap required to store 0 */
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;
}
if (sc->sc_flags & FXPF_MII) {
/* Tick the MII clock. */
mii_tick(&sc->sc_mii);
}
splx(s);
/*
* Schedule another timeout one second from now.
*/
callout_reset(&sc->sc_callout, hz, fxp_tick, sc);
}
/*
* Drain the receive queue.
*/
void
fxp_rxdrain(struct fxp_softc *sc)
{
bus_dmamap_t rxmap;
struct mbuf *m;
for (;;) {
IF_DEQUEUE(&sc->sc_rxq, m);
if (m == NULL)
break;
rxmap = M_GETCTX(m, bus_dmamap_t);
bus_dmamap_unload(sc->sc_dmat, rxmap);
FXP_RXMAP_PUT(sc, rxmap);
m_freem(m);
}
}
/*
* Stop the interface. Cancels the statistics updater and resets
* the interface.
*/
void
fxp_stop(struct ifnet *ifp, int disable)
{
struct fxp_softc *sc = ifp->if_softc;
struct fxp_txsoft *txs;
int i;
/*
* Turn down interface (done early to avoid bad interactions
* between panics, shutdown hooks, and the watchdog timer)
*/
ifp->if_timer = 0;
ifp->if_flags &= ~(IFF_RUNNING | IFF_OACTIVE);
/*
* Cancel stats updater.
*/
callout_stop(&sc->sc_callout);
if (sc->sc_flags & FXPF_MII) {
/* Down the MII. */
mii_down(&sc->sc_mii);
}
/*
* Issue software reset
*/
CSR_WRITE_4(sc, FXP_CSR_PORT, FXP_PORT_SELECTIVE_RESET);
DELAY(10);
/*
* Release any xmit buffers.
*/
for (i = 0; i < FXP_NTXCB; i++) {
txs = FXP_DSTX(sc, i);
if (txs->txs_mbuf != NULL) {
bus_dmamap_unload(sc->sc_dmat, txs->txs_dmamap);
m_freem(txs->txs_mbuf);
txs->txs_mbuf = NULL;
}
}
sc->sc_txpending = 0;
if (disable) {
fxp_rxdrain(sc);
fxp_disable(sc);
}
}
/*
* 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.
*/
void
fxp_watchdog(struct ifnet *ifp)
{
struct fxp_softc *sc = ifp->if_softc;
printf("%s: device timeout\n", sc->sc_dev.dv_xname);
ifp->if_oerrors++;
(void) fxp_init(ifp);
}
/*
* Initialize the interface. Must be called at splnet().
*/
int
fxp_init(struct ifnet *ifp)
{
struct fxp_softc *sc = ifp->if_softc;
struct fxp_cb_config *cbp;
struct fxp_cb_ias *cb_ias;
struct fxp_txdesc *txd;
bus_dmamap_t rxmap;
int i, prm, save_bf, lrxen, allm, error = 0;
if ((error = fxp_enable(sc)) != 0)
goto out;
/*
* Cancel any pending I/O
*/
fxp_stop(ifp, 0);
/*
* XXX just setting sc_flags to 0 here clears any FXPF_MII
* flag, and this prevents the MII from detaching resulting in
* a panic. The flags field should perhaps be split in runtime
* flags and more static information. For now, just clear the
* only other flag set.
*/
sc->sc_flags &= ~FXPF_WANTINIT;
/*
* Initialize base of CBL and RFA memory. Loading with zero
* sets it up for regular linear addressing.
*/
fxp_scb_wait(sc);
CSR_WRITE_4(sc, FXP_CSR_SCB_GENERAL, 0);
fxp_scb_cmd(sc, FXP_SCB_COMMAND_CU_BASE);
fxp_scb_wait(sc);
fxp_scb_cmd(sc, FXP_SCB_COMMAND_RU_BASE);
/*
* Initialize the multicast filter. Do this now, since we might
* have to setup the config block differently.
*/
fxp_mc_setup(sc);
prm = (ifp->if_flags & IFF_PROMISC) ? 1 : 0;
allm = (ifp->if_flags & IFF_ALLMULTI) ? 1 : 0;
/*
* In order to support receiving 802.1Q VLAN frames, we have to
* enable "save bad frames", since they are 4 bytes larger than
* the normal Ethernet maximum frame length. On i82558 and later,
* we have a better mechanism for this.
*/
save_bf = 0;
lrxen = 0;
if (sc->sc_ethercom.ec_capenable & ETHERCAP_VLAN_MTU) {
if (sc->sc_rev < FXP_REV_82558_A4)
save_bf = 1;
else
lrxen = 1;
}
/*
* Initialize base of dump-stats buffer.
*/
fxp_scb_wait(sc);
CSR_WRITE_4(sc, FXP_CSR_SCB_GENERAL,
sc->sc_cddma + FXP_CDSTATSOFF);
FXP_CDSTATSSYNC(sc, BUS_DMASYNC_PREREAD);
fxp_scb_cmd(sc, FXP_SCB_COMMAND_CU_DUMP_ADR);
cbp = &sc->sc_control_data->fcd_configcb;
memset(cbp, 0, sizeof(struct fxp_cb_config));
/*
* This copy 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.
*/
memcpy(cbp, fxp_cb_config_template, sizeof(fxp_cb_config_template));
/* BIG_ENDIAN: no need to swap to store 0 */
cbp->cb_status = 0;
cbp->cb_command = htole16(FXP_CB_COMMAND_CONFIG |
FXP_CB_COMMAND_EL);
/* BIG_ENDIAN: no need to swap to store 0xffffffff */
cbp->link_addr = 0xffffffff; /* (no) next command */
/* bytes in config block */
cbp->byte_count = FXP_CONFIG_LEN;
cbp->rx_fifo_limit = 8; /* rx fifo threshold (32 bytes) */
cbp->tx_fifo_limit = 0; /* tx fifo threshold (0 bytes) */
cbp->adaptive_ifs = 0; /* (no) adaptive interframe spacing */
cbp->mwi_enable = (sc->sc_flags & FXPF_MWI) ? 1 : 0;
cbp->type_enable = 0; /* actually reserved */
cbp->read_align_en = (sc->sc_flags & FXPF_READ_ALIGN) ? 1 : 0;
cbp->end_wr_on_cl = (sc->sc_flags & FXPF_WRITE_ALIGN) ? 1 : 0;
cbp->rx_dma_bytecount = 0; /* (no) rx DMA max */
cbp->tx_dma_bytecount = 0; /* (no) tx DMA max */
cbp->dma_mbce = 0; /* (disable) dma max counters */
cbp->late_scb = 0; /* (don't) defer SCB update */
cbp->tno_int_or_tco_en =0; /* (disable) tx not okay interrupt */
cbp->ci_int = 1; /* interrupt on CU idle */
cbp->ext_txcb_dis = (sc->sc_flags & FXPF_EXT_TXCB) ? 0 : 1;
cbp->ext_stats_dis = 1; /* disable extended counters */
cbp->keep_overrun_rx = 0; /* don't pass overrun frames to host */
cbp->save_bf = save_bf;/* save bad frames */
cbp->disc_short_rx = !prm; /* discard short packets */
cbp->underrun_retry = 1; /* retry mode (1) on DMA underrun */
cbp->two_frames = 0; /* do not limit FIFO to 2 frames */
cbp->dyn_tbd = 0; /* (no) dynamic TBD mode */
/* interface mode */
cbp->mediatype = (sc->sc_flags & FXPF_MII) ? 1 : 0;
cbp->csma_dis = 0; /* (don't) disable link */
cbp->tcp_udp_cksum = 0; /* (don't) enable checksum */
cbp->vlan_tco = 0; /* (don't) enable vlan wakeup */
cbp->link_wake_en = 0; /* (don't) assert PME# on link change */
cbp->arp_wake_en = 0; /* (don't) assert PME# on arp */
cbp->mc_wake_en = 0; /* (don't) assert PME# on mcmatch */
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->wait_after_win = 0; /* (don't) enable modified backoff alg*/
cbp->ignore_ul = 0; /* consider U/L bit in IA matching */
cbp->crc16_en = 0; /* (don't) enable crc-16 algorithm */
cbp->crscdt = (sc->sc_flags & FXPF_MII) ? 0 : 1;
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->long_rx_en = lrxen; /* long packet receive enable */
cbp->ia_wake_en = 0; /* (don't) wake up on address match */
cbp->magic_pkt_dis = 0; /* (don't) disable magic packet */
/* must set wake_en in PMCSR also */
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 = allm; /* accept all multicasts */
if (sc->sc_rev < FXP_REV_82558_A4) {
/*
* The i82557 has no hardware flow control, the values
* here are the defaults for the chip.
*/
cbp->fc_delay_lsb = 0;
cbp->fc_delay_msb = 0x40;
cbp->pri_fc_thresh = 3;
cbp->tx_fc_dis = 0;
cbp->rx_fc_restop = 0;
cbp->rx_fc_restart = 0;
cbp->fc_filter = 0;
cbp->pri_fc_loc = 1;
} else {
cbp->fc_delay_lsb = 0x1f;
cbp->fc_delay_msb = 0x01;
cbp->pri_fc_thresh = 3;
cbp->tx_fc_dis = 0; /* enable transmit FC */
cbp->rx_fc_restop = 1; /* enable FC restop frames */
cbp->rx_fc_restart = 1; /* enable FC restart frames */
cbp->fc_filter = !prm; /* drop FC frames to host */
cbp->pri_fc_loc = 1; /* FC pri location (byte31) */
}
FXP_CDCONFIGSYNC(sc, BUS_DMASYNC_PREREAD|BUS_DMASYNC_PREWRITE);
/*
* Start the config command/DMA.
*/
fxp_scb_wait(sc);
CSR_WRITE_4(sc, FXP_CSR_SCB_GENERAL, sc->sc_cddma + FXP_CDCONFIGOFF);
fxp_scb_cmd(sc, FXP_SCB_COMMAND_CU_START);
/* ...and wait for it to complete. */
i = 1000;
do {
FXP_CDCONFIGSYNC(sc,
BUS_DMASYNC_POSTREAD|BUS_DMASYNC_POSTWRITE);
DELAY(1);
} while ((le16toh(cbp->cb_status) & FXP_CB_STATUS_C) == 0 && --i);
if (i == 0) {
printf("%s at line %d: dmasync timeout\n",
sc->sc_dev.dv_xname, __LINE__);
return ETIMEDOUT;
}
/*
* Initialize the station address.
*/
cb_ias = &sc->sc_control_data->fcd_iascb;
/* BIG_ENDIAN: no need to swap to store 0 */
cb_ias->cb_status = 0;
cb_ias->cb_command = htole16(FXP_CB_COMMAND_IAS | FXP_CB_COMMAND_EL);
/* BIG_ENDIAN: no need to swap to store 0xffffffff */
cb_ias->link_addr = 0xffffffff;
memcpy((void *)cb_ias->macaddr, LLADDR(ifp->if_sadl), ETHER_ADDR_LEN);
FXP_CDIASSYNC(sc, BUS_DMASYNC_PREREAD|BUS_DMASYNC_PREWRITE);
/*
* Start the IAS (Individual Address Setup) command/DMA.
*/
fxp_scb_wait(sc);
CSR_WRITE_4(sc, FXP_CSR_SCB_GENERAL, sc->sc_cddma + FXP_CDIASOFF);
fxp_scb_cmd(sc, FXP_SCB_COMMAND_CU_START);
/* ...and wait for it to complete. */
i = 1000;
do {
FXP_CDIASSYNC(sc,
BUS_DMASYNC_POSTREAD|BUS_DMASYNC_POSTWRITE);
DELAY(1);
} while ((le16toh(cb_ias->cb_status) & FXP_CB_STATUS_C) == 0 && --i);
if (i == 0) {
printf("%s at line %d: dmasync timeout\n",
sc->sc_dev.dv_xname, __LINE__);
return ETIMEDOUT;
}
/*
* Initialize the transmit descriptor ring. txlast is initialized
* to the end of the list so that it will wrap around to the first
* descriptor when the first packet is transmitted.
*/
for (i = 0; i < FXP_NTXCB; i++) {
txd = FXP_CDTX(sc, i);
memset(txd, 0, sizeof(*txd));
txd->txd_txcb.cb_command =
htole16(FXP_CB_COMMAND_NOP | FXP_CB_COMMAND_S);
txd->txd_txcb.link_addr =
htole32(FXP_CDTXADDR(sc, FXP_NEXTTX(i)));
if (sc->sc_flags & FXPF_EXT_TXCB)
txd->txd_txcb.tbd_array_addr =
htole32(FXP_CDTBDADDR(sc, i) +
(2 * sizeof(struct fxp_tbd)));
else
txd->txd_txcb.tbd_array_addr =
htole32(FXP_CDTBDADDR(sc, i));
FXP_CDTXSYNC(sc, i, BUS_DMASYNC_PREREAD|BUS_DMASYNC_PREWRITE);
}
sc->sc_txpending = 0;
sc->sc_txdirty = 0;
sc->sc_txlast = FXP_NTXCB - 1;
/*
* Initialize the receive buffer list.
*/
sc->sc_rxq.ifq_maxlen = FXP_NRFABUFS;
while (sc->sc_rxq.ifq_len < FXP_NRFABUFS) {
rxmap = FXP_RXMAP_GET(sc);
if ((error = fxp_add_rfabuf(sc, rxmap, 0)) != 0) {
printf("%s: unable to allocate or map rx "
"buffer %d, error = %d\n",
sc->sc_dev.dv_xname,
sc->sc_rxq.ifq_len, error);
/*
* XXX Should attempt to run with fewer receive
* XXX buffers instead of just failing.
*/
FXP_RXMAP_PUT(sc, rxmap);
fxp_rxdrain(sc);
goto out;
}
}
sc->sc_rxidle = 0;
/*
* Give the transmit ring to the chip. We do this by pointing
* the chip at the last descriptor (which is a NOP|SUSPEND), and
* issuing a start command. It will execute the NOP and then
* suspend, pointing at the first descriptor.
*/
fxp_scb_wait(sc);
CSR_WRITE_4(sc, FXP_CSR_SCB_GENERAL, FXP_CDTXADDR(sc, sc->sc_txlast));
fxp_scb_cmd(sc, FXP_SCB_COMMAND_CU_START);
/*
* Initialize receiver buffer area - RFA.
*/
rxmap = M_GETCTX(sc->sc_rxq.ifq_head, bus_dmamap_t);
fxp_scb_wait(sc);
CSR_WRITE_4(sc, FXP_CSR_SCB_GENERAL,
rxmap->dm_segs[0].ds_addr + RFA_ALIGNMENT_FUDGE);
fxp_scb_cmd(sc, FXP_SCB_COMMAND_RU_START);
if (sc->sc_flags & FXPF_MII) {
/*
* Set current media.
*/
mii_mediachg(&sc->sc_mii);
}
/*
* ...all done!
*/
ifp->if_flags |= IFF_RUNNING;
ifp->if_flags &= ~IFF_OACTIVE;
/*
* Start the one second timer.
*/
callout_reset(&sc->sc_callout, hz, fxp_tick, sc);
/*
* Attempt to start output on the interface.
*/
fxp_start(ifp);
out:
if (error) {
ifp->if_flags &= ~(IFF_RUNNING | IFF_OACTIVE);
ifp->if_timer = 0;
printf("%s: interface not running\n", sc->sc_dev.dv_xname);
}
return (error);
}
/*
* Change media according to request.
*/
int
fxp_mii_mediachange(struct ifnet *ifp)
{
struct fxp_softc *sc = ifp->if_softc;
if (ifp->if_flags & IFF_UP)
mii_mediachg(&sc->sc_mii);
return (0);
}
/*
* Notify the world which media we're using.
*/
void
fxp_mii_mediastatus(struct ifnet *ifp, struct ifmediareq *ifmr)
{
struct fxp_softc *sc = ifp->if_softc;
if(sc->sc_enabled == 0) {
ifmr->ifm_active = IFM_ETHER | IFM_NONE;
ifmr->ifm_status = 0;
return;
}
mii_pollstat(&sc->sc_mii);
ifmr->ifm_status = sc->sc_mii.mii_media_status;
ifmr->ifm_active = sc->sc_mii.mii_media_active;
}
int
fxp_80c24_mediachange(struct ifnet *ifp)
{
/* Nothing to do here. */
return (0);
}
void
fxp_80c24_mediastatus(struct ifnet *ifp, struct ifmediareq *ifmr)
{
struct fxp_softc *sc = ifp->if_softc;
/*
* Media is currently-selected media. We cannot determine
* the link status.
*/
ifmr->ifm_status = 0;
ifmr->ifm_active = sc->sc_mii.mii_media.ifm_cur->ifm_media;
}
/*
* Add a buffer to the end of the RFA buffer list.
* Return 0 if successful, error code on failure.
*
* The RFA struct is stuck at the beginning of mbuf cluster and the
* data pointer is fixed up to point just past it.
*/
int
fxp_add_rfabuf(struct fxp_softc *sc, bus_dmamap_t rxmap, int unload)
{
struct mbuf *m;
int error;
MGETHDR(m, M_DONTWAIT, MT_DATA);
if (m == NULL)
return (ENOBUFS);
MCLGET(m, M_DONTWAIT);
if ((m->m_flags & M_EXT) == 0) {
m_freem(m);
return (ENOBUFS);
}
if (unload)
bus_dmamap_unload(sc->sc_dmat, rxmap);
M_SETCTX(m, rxmap);
error = bus_dmamap_load(sc->sc_dmat, rxmap,
m->m_ext.ext_buf, m->m_ext.ext_size, NULL,
BUS_DMA_READ|BUS_DMA_NOWAIT);
if (error) {
printf("%s: can't load rx DMA map %d, error = %d\n",
sc->sc_dev.dv_xname, sc->sc_rxq.ifq_len, error);
panic("fxp_add_rfabuf"); /* XXX */
}
FXP_INIT_RFABUF(sc, m);
return (0);
}
int
fxp_mdi_read(struct device *self, int phy, int reg)
{
struct fxp_softc *sc = (struct fxp_softc *)self;
int count = 10000;
int value;
CSR_WRITE_4(sc, FXP_CSR_MDICONTROL,
(FXP_MDI_READ << 26) | (reg << 16) | (phy << 21));
while (((value = CSR_READ_4(sc, FXP_CSR_MDICONTROL)) & 0x10000000) == 0
&& count--)
DELAY(10);
if (count <= 0)
printf("%s: fxp_mdi_read: timed out\n", sc->sc_dev.dv_xname);
return (value & 0xffff);
}
void
fxp_statchg(struct device *self)
{
struct fxp_softc *sc = (void *) self;
/*
* Determine whether or not we have to work-around the
* Resume Bug.
*/
if (sc->sc_flags & FXPF_HAS_RESUME_BUG) {
if (IFM_TYPE(sc->sc_mii.mii_media_active) == IFM_10_T)
sc->sc_flags |= FXPF_FIX_RESUME_BUG;
else
sc->sc_flags &= ~FXPF_FIX_RESUME_BUG;
}
}
void
fxp_mdi_write(struct device *self, int phy, int reg, int value)
{
struct fxp_softc *sc = (struct fxp_softc *)self;
int count = 10000;
CSR_WRITE_4(sc, FXP_CSR_MDICONTROL,
(FXP_MDI_WRITE << 26) | (reg << 16) | (phy << 21) |
(value & 0xffff));
while((CSR_READ_4(sc, FXP_CSR_MDICONTROL) & 0x10000000) == 0 &&
count--)
DELAY(10);
if (count <= 0)
printf("%s: fxp_mdi_write: timed out\n", sc->sc_dev.dv_xname);
}
int
fxp_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data)
{
struct fxp_softc *sc = ifp->if_softc;
struct ifreq *ifr = (struct ifreq *)data;
int s, error;
s = splnet();
switch (cmd) {
case SIOCSIFMEDIA:
case SIOCGIFMEDIA:
error = ifmedia_ioctl(ifp, ifr, &sc->sc_mii.mii_media, cmd);
break;
default:
error = ether_ioctl(ifp, cmd, data);
if (error == ENETRESET) {
if (sc->sc_enabled) {
/*
* Multicast list has changed; set the
* hardware filter accordingly.
*/
if (sc->sc_txpending) {
sc->sc_flags |= FXPF_WANTINIT;
error = 0;
} else
error = fxp_init(ifp);
} else
error = 0;
}
break;
}
/* Try to get more packets going. */
if (sc->sc_enabled)
fxp_start(ifp);
splx(s);
return (error);
}
/*
* Program the multicast filter.
*
* This function must be called at splnet().
*/
void
fxp_mc_setup(struct fxp_softc *sc)
{
struct fxp_cb_mcs *mcsp = &sc->sc_control_data->fcd_mcscb;
struct ifnet *ifp = &sc->sc_ethercom.ec_if;
struct ethercom *ec = &sc->sc_ethercom;
struct ether_multi *enm;
struct ether_multistep step;
int count, nmcasts;
#ifdef DIAGNOSTIC
if (sc->sc_txpending)
panic("fxp_mc_setup: pending transmissions");
#endif
ifp->if_flags &= ~IFF_ALLMULTI;
/*
* Initialize multicast setup descriptor.
*/
nmcasts = 0;
ETHER_FIRST_MULTI(step, ec, enm);
while (enm != NULL) {
/*
* Check for too many multicast addresses or if we're
* listening to a range. Either way, we simply have
* to accept all multicasts.
*/
if (nmcasts >= MAXMCADDR ||
memcmp(enm->enm_addrlo, enm->enm_addrhi,
ETHER_ADDR_LEN) != 0) {
/*
* Callers of this function must do the
* right thing with this. If we're called
* from outside fxp_init(), the caller must
* detect if the state if IFF_ALLMULTI changes.
* If it does, the caller must then call
* fxp_init(), since allmulti is handled by
* the config block.
*/
ifp->if_flags |= IFF_ALLMULTI;
return;
}
memcpy((void *)&mcsp->mc_addr[nmcasts][0], enm->enm_addrlo,
ETHER_ADDR_LEN);
nmcasts++;
ETHER_NEXT_MULTI(step, enm);
}
/* BIG_ENDIAN: no need to swap to store 0 */
mcsp->cb_status = 0;
mcsp->cb_command = htole16(FXP_CB_COMMAND_MCAS | FXP_CB_COMMAND_EL);
mcsp->link_addr = htole32(FXP_CDTXADDR(sc, FXP_NEXTTX(sc->sc_txlast)));
mcsp->mc_cnt = htole16(nmcasts * ETHER_ADDR_LEN);
FXP_CDMCSSYNC(sc, BUS_DMASYNC_PREREAD|BUS_DMASYNC_PREWRITE);
/*
* Wait until the command unit is not active. This should never
* happen since nothing is queued, but make sure anyway.
*/
count = 100;
while ((CSR_READ_1(sc, FXP_CSR_SCB_RUSCUS) >> 6) ==
FXP_SCB_CUS_ACTIVE && --count)
DELAY(1);
if (count == 0) {
printf("%s at line %d: command queue timeout\n",
sc->sc_dev.dv_xname, __LINE__);
return;
}
/*
* Start the multicast setup command/DMA.
*/
fxp_scb_wait(sc);
CSR_WRITE_4(sc, FXP_CSR_SCB_GENERAL, sc->sc_cddma + FXP_CDMCSOFF);
fxp_scb_cmd(sc, FXP_SCB_COMMAND_CU_START);
/* ...and wait for it to complete. */
count = 1000;
do {
FXP_CDMCSSYNC(sc,
BUS_DMASYNC_POSTREAD|BUS_DMASYNC_POSTWRITE);
DELAY(1);
} while ((le16toh(mcsp->cb_status) & FXP_CB_STATUS_C) == 0 && --count);
if (count == 0) {
printf("%s at line %d: dmasync timeout\n",
sc->sc_dev.dv_xname, __LINE__);
return;
}
}
int
fxp_enable(struct fxp_softc *sc)
{
if (sc->sc_enabled == 0 && sc->sc_enable != NULL) {
if ((*sc->sc_enable)(sc) != 0) {
printf("%s: device enable failed\n",
sc->sc_dev.dv_xname);
return (EIO);
}
}
sc->sc_enabled = 1;
return (0);
}
void
fxp_disable(struct fxp_softc *sc)
{
if (sc->sc_enabled != 0 && sc->sc_disable != NULL) {
(*sc->sc_disable)(sc);
sc->sc_enabled = 0;
}
}
/*
* fxp_activate:
*
* Handle device activation/deactivation requests.
*/
int
fxp_activate(struct device *self, enum devact act)
{
struct fxp_softc *sc = (void *) self;
int s, error = 0;
s = splnet();
switch (act) {
case DVACT_ACTIVATE:
error = EOPNOTSUPP;
break;
case DVACT_DEACTIVATE:
if (sc->sc_flags & FXPF_MII)
mii_activate(&sc->sc_mii, act, MII_PHY_ANY,
MII_OFFSET_ANY);
if_deactivate(&sc->sc_ethercom.ec_if);
break;
}
splx(s);
return (error);
}
/*
* fxp_detach:
*
* Detach an i82557 interface.
*/
int
fxp_detach(struct fxp_softc *sc)
{
struct ifnet *ifp = &sc->sc_ethercom.ec_if;
int i;
/* Succeed now if there's no work to do. */
if ((sc->sc_flags & FXPF_ATTACHED) == 0)
return (0);
/* Unhook our tick handler. */
callout_stop(&sc->sc_callout);
if (sc->sc_flags & FXPF_MII) {
/* Detach all PHYs */
mii_detach(&sc->sc_mii, MII_PHY_ANY, MII_OFFSET_ANY);
}
/* Delete all remaining media. */
ifmedia_delete_instance(&sc->sc_mii.mii_media, IFM_INST_ANY);
#if NRND > 0
rnd_detach_source(&sc->rnd_source);
#endif
ether_ifdetach(ifp);
if_detach(ifp);
for (i = 0; i < FXP_NRFABUFS; i++) {
bus_dmamap_unload(sc->sc_dmat, sc->sc_rxmaps[i]);
bus_dmamap_destroy(sc->sc_dmat, sc->sc_rxmaps[i]);
}
for (i = 0; i < FXP_NTXCB; i++) {
bus_dmamap_unload(sc->sc_dmat, FXP_DSTX(sc, i)->txs_dmamap);
bus_dmamap_destroy(sc->sc_dmat, FXP_DSTX(sc, i)->txs_dmamap);
}
bus_dmamap_unload(sc->sc_dmat, sc->sc_dmamap);
bus_dmamap_destroy(sc->sc_dmat, sc->sc_dmamap);
bus_dmamem_unmap(sc->sc_dmat, (caddr_t)sc->sc_control_data,
sizeof(struct fxp_control_data));
bus_dmamem_free(sc->sc_dmat, &sc->sc_cdseg, sc->sc_cdnseg);
shutdownhook_disestablish(sc->sc_sdhook);
powerhook_disestablish(sc->sc_powerhook);
return (0);
}
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