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freebsd-skq/sys/dev/lmc/if_lmc.c
Bjoern A. Zeeb a34c6aeb85 Tag mbufs of all incoming frames or packets with the interface's FIB 
setting (either default or if supported as set by SIOCSIFFIB, e.g.
from ifconfig).

Submitted by:	Alexander V. Chernikov (melifaro ipfw.ru)
Reviewed by:	julian
MFC after:	2 weeks
2011-07-03 16:08:38 +00:00

7043 lines
208 KiB
C
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/*
* $FreeBSD$
*
* Copyright (c) 2002-2004 David Boggs. <boggs@boggs.palo-alto.ca.us>
* All rights reserved.
*
* BSD License:
*
* 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.
*
* GNU General Public License:
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the Free
* Software Foundation; either version 2 of the License, or (at your option)
* any later version.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License along with
* this program; if not, write to the Free Software Foundation, Inc., 59
* Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*
* Description:
*
* This is an open-source Unix device driver for PCI-bus WAN interface cards.
* It sends and receives packets in HDLC frames over synchronous links.
* A generic PC plus Unix plus some SBE/LMC cards makes an OPEN router.
* This driver works with FreeBSD, NetBSD, OpenBSD, BSD/OS and Linux.
* It has been tested on i386 (32-bit little-end), Sparc (64-bit big-end),
* and Alpha (64-bit little-end) architectures.
*
* History and Authors:
*
* Ron Crane had the neat idea to use a Fast Ethernet chip as a PCI
* interface and add an Ethernet-to-HDLC gate array to make a WAN card.
* David Boggs designed the Ethernet-to-HDLC gate arrays and PC cards.
* We did this at our company, LAN Media Corporation (LMC).
* SBE Corp acquired LMC and continues to make the cards.
*
* Since the cards use Tulip Ethernet chips, we started with Matt Thomas'
* ubiquitous "de" driver. Michael Graff stripped out the Ethernet stuff
* and added HSSI stuff. Basil Gunn ported it to Solaris (lost) and
* Rob Braun ported it to Linux. Andrew Stanley-Jones added support
* for three more cards and wrote the first version of lmcconfig.
* During 2002-5 David Boggs rewrote it and now feels responsible for it.
*
* Responsible Individual:
*
* Send bug reports and improvements to <boggs@boggs.palo-alto.ca.us>.
*/
#ifdef __FreeBSD__
# include <sys/param.h> /* OS version */
# define IFNET 1
# include "opt_inet.h" /* INET */
# include "opt_inet6.h" /* INET6 */
# include "opt_netgraph.h" /* NETGRAPH */
# ifdef HAVE_KERNEL_OPTION_HEADERS
# include "opt_device_polling.h" /* DEVICE_POLLING */
# endif
# ifndef INET
# define INET 0
# endif
# ifndef INET6
# define INET6 0
# endif
# ifndef NETGRAPH
# define NETGRAPH 0
# endif
# define P2P 0 /* not in FreeBSD */
# if (__FreeBSD_version >= 500000)
# define NSPPP 1 /* No count devices in FreeBSD 5 */
# include "opt_bpf.h" /* DEV_BPF */
# define NBPFILTER DEV_BPF
# else /* FreeBSD-4 */
# include "sppp.h" /* NSPPP */
# include "bpf.h" /* NBPF */
# define NBPFILTER NBPF
# endif
# define GEN_HDLC 0 /* not in FreeBSD */
#
# include <sys/systm.h>
# include <sys/kernel.h>
# include <sys/malloc.h>
# include <sys/mbuf.h>
# include <sys/socket.h>
# include <sys/sockio.h>
# include <sys/module.h>
# include <sys/bus.h>
# include <sys/lock.h>
# include <net/if.h>
# include <net/if_types.h>
# include <net/if_media.h>
# include <net/netisr.h>
# include <net/route.h>
# include <machine/bus.h>
# include <machine/resource.h>
# include <sys/rman.h>
# include <vm/vm.h>
# include <vm/pmap.h>
# if (__FreeBSD_version >= 700000)
# include <sys/priv.h>
# endif
# if (__FreeBSD_version >= 500000)
# include <sys/mutex.h>
# include <dev/pci/pcivar.h>
# else /* FreeBSD-4 */
# include <sys/proc.h>
# include <pci/pcivar.h>
# endif
# if NETGRAPH
# include <netgraph/ng_message.h>
# include <netgraph/netgraph.h>
# endif
# if (INET || INET6)
# include <netinet/in.h>
# include <netinet/in_var.h>
# endif
# if NSPPP
# include <net/if_sppp.h>
# endif
# if NBPFILTER
# include <net/bpf.h>
# endif
/* and finally... */
# include <dev/lmc/if_lmc.h>
#endif /*__FreeBSD__*/
#ifdef __NetBSD__
# include <sys/param.h> /* OS version */
# define IFNET 1
# include "opt_inet.h" /* INET6, INET */
# define NETGRAPH 0 /* not in NetBSD */
# include "sppp.h" /* NSPPP */
# define P2P 0 /* not in NetBSD */
# include "opt_altq_enabled.h" /* ALTQ */
# include "bpfilter.h" /* NBPFILTER */
# define GEN_HDLC 0 /* not in NetBSD */
#
# include <sys/systm.h>
# include <sys/kernel.h>
# include <sys/lkm.h>
# include <sys/mbuf.h>
# include <sys/socket.h>
# include <sys/sockio.h>
# include <sys/device.h>
# include <sys/lock.h>
# include <net/if.h>
# include <net/if_types.h>
# include <net/if_media.h>
# include <net/netisr.h>
# include <machine/bus.h>
# include <machine/intr.h>
# include <dev/pci/pcivar.h>
# if (__NetBSD_Version__ >= 106000000)
# include <uvm/uvm_extern.h>
# else
# include <vm/vm.h>
# endif
# if (INET || INET6)
# include <netinet/in.h>
# include <netinet/in_var.h>
# endif
# if NSPPP
# if (__NetBSD_Version__ >= 106000000)
# include <net/if_spppvar.h>
# else
# include <net/if_sppp.h>
# endif
# endif
# if NBPFILTER
# include <net/bpf.h>
# endif
/* and finally... */
# include "if_lmc.h"
#endif /*__NetBSD__*/
#ifdef __OpenBSD__
# include <sys/param.h> /* OS version */
# define IFNET 1
/* -DINET is passed on the compiler command line */
/* -DINET6 is passed on the compiler command line */
# define NETGRAPH 0 /* not in OpenBSD */
# include "sppp.h" /* NSPPP */
# define P2P 0 /* not in OpenBSD */
/* -DALTQ is passed on the compiler command line */
# include "bpfilter.h" /* NBPFILTER */
# define GEN_HDLC 0 /* not in OpenBSD */
#
# include <sys/systm.h>
# include <sys/kernel.h>
# include <sys/conf.h>
# include <sys/exec.h>
# include <sys/lkm.h>
# include <sys/mbuf.h>
# include <sys/socket.h>
# include <sys/sockio.h>
# include <sys/device.h>
# include <sys/lock.h>
# include <net/if.h>
# include <net/if_types.h>
# include <net/if_media.h>
# include <net/netisr.h>
# include <machine/bus.h>
# include <machine/intr.h>
# include <dev/pci/pcivar.h>
# if (OpenBSD >= 200206)
# include <uvm/uvm_extern.h>
# else
# include <vm/vm.h>
# endif
# if (INET || INET6)
# include <netinet/in.h>
# include <netinet/in_var.h>
# endif
# if NSPPP
# include <net/if_sppp.h>
# endif
# if NBPFILTER
# include <net/bpf.h>
# endif
/* and finally... */
# include "if_lmc.h"
#endif /*__OpenBSD__*/
#ifdef __bsdi__
# include <sys/param.h> /* OS version */
# define IFNET 1
/* -DINET is passed on the compiler command line */
/* -DINET6 is passed on the compiler command line */
# define NETGRAPH 0 /* not in BSD/OS */
# define NSPPP 0 /* not in BSD/OS */
/* -DPPP is passed on the compiler command line */
/* -DCISCO_HDLC is passed on the compiler command line */
/* -DFR is passed on the compiler command line */
# if (PPP || CISCO_HDLC || FR)
# define P2P 1
# else
# define P2P 0
# endif
# define ALTQ 0 /* not in BSD/OS */
# include "bpfilter.h" /* NBPFILTER */
# define GEN_HDLC 0 /* not in BSD/OS */
#
# include <sys/kernel.h>
# include <sys/malloc.h>
# include <sys/mbuf.h>
# include <sys/socket.h>
# include <sys/sockio.h>
# include <sys/device.h>
# include <sys/lock.h>
# include <net/if.h>
# include <net/if_types.h>
# include <net/if_media.h>
# include <net/netisr.h>
# include <vm/vm.h>
# include <i386/isa/dma.h>
# include <i386/isa/isavar.h>
# include <i386/include/cpu.h>
# include <i386/pci/pci.h>
# if (INET || INET6)
# include <netinet/in.h>
# include <netinet/in_var.h>
# endif
# if P2P
# include <net/if_p2p.h>
# include <sys/ttycom.h>
# endif
# if NBPFILTER
# include <net/bpf.h>
# endif
/* and finally... */
# include "if_lmc.h"
#endif /*__bsdi__*/
#ifdef __linux__
# include <linux/config.h>
# if (CONFIG_HDLC || CONFIG_HDLC_MODULE)
# define GEN_HDLC 1
# else
# define GEN_HDLC 0
# endif
# define IFNET 0 /* different in Linux */
# define NETGRAPH 0 /* not in Linux */
# define NSPPP 0 /* different in Linux */
# define P2P 0 /* not in Linux */
# define ALTQ 0 /* different in Linux */
# define NBPFILTER 0 /* different in Linux */
#
# include <linux/pci.h>
# include <linux/delay.h>
# include <linux/netdevice.h>
# include <linux/if_arp.h>
# if GEN_HDLC
# include <linux/hdlc.h>
# endif
/* and finally... */
# include "if_lmc.h"
#endif /* __linux__ */
/* The SROM is a generic 93C46 serial EEPROM (64 words by 16 bits). */
/* Data is set up before the RISING edge of CLK; CLK is parked low. */
static void
shift_srom_bits(softc_t *sc, u_int32_t data, u_int32_t len)
{
u_int32_t csr = READ_CSR(TLP_SROM_MII);
for (; len>0; len--)
{ /* MSB first */
if (data & (1<<(len-1)))
csr |= TLP_SROM_DIN; /* DIN setup */
else
csr &= ~TLP_SROM_DIN; /* DIN setup */
WRITE_CSR(TLP_SROM_MII, csr);
csr |= TLP_SROM_CLK; /* CLK rising edge */
WRITE_CSR(TLP_SROM_MII, csr);
csr &= ~TLP_SROM_CLK; /* CLK falling edge */
WRITE_CSR(TLP_SROM_MII, csr);
}
}
/* Data is sampled on the RISING edge of CLK; CLK is parked low. */
static u_int16_t
read_srom(softc_t *sc, u_int8_t addr)
{
int i;
u_int32_t csr;
u_int16_t data;
/* Enable SROM access. */
csr = (TLP_SROM_SEL | TLP_SROM_RD | TLP_MII_MDOE);
WRITE_CSR(TLP_SROM_MII, csr);
/* CS rising edge prepares SROM for a new cycle. */
csr |= TLP_SROM_CS;
WRITE_CSR(TLP_SROM_MII, csr); /* assert CS */
shift_srom_bits(sc, 6, 4); /* issue read cmd */
shift_srom_bits(sc, addr, 6); /* issue address */
for (data=0, i=16; i>=0; i--) /* read ->17<- bits of data */
{ /* MSB first */
csr = READ_CSR(TLP_SROM_MII); /* DOUT sampled */
data = (data<<1) | ((csr & TLP_SROM_DOUT) ? 1:0);
csr |= TLP_SROM_CLK; /* CLK rising edge */
WRITE_CSR(TLP_SROM_MII, csr);
csr &= ~TLP_SROM_CLK; /* CLK falling edge */
WRITE_CSR(TLP_SROM_MII, csr);
}
/* Disable SROM access. */
WRITE_CSR(TLP_SROM_MII, TLP_MII_MDOE);
return data;
}
/* The SROM is formatted by the mfgr and should NOT be written! */
/* But lmcconfig can rewrite it in case it gets overwritten somehow. */
/* IOCTL SYSCALL: can sleep. */
static void
write_srom(softc_t *sc, u_int8_t addr, u_int16_t data)
{
u_int32_t csr;
int i;
/* Enable SROM access. */
csr = (TLP_SROM_SEL | TLP_SROM_RD | TLP_MII_MDOE);
WRITE_CSR(TLP_SROM_MII, csr);
/* Issue write-enable command. */
csr |= TLP_SROM_CS;
WRITE_CSR(TLP_SROM_MII, csr); /* assert CS */
shift_srom_bits(sc, 4, 4); /* issue write enable cmd */
shift_srom_bits(sc, 63, 6); /* issue address */
csr &= ~TLP_SROM_CS;
WRITE_CSR(TLP_SROM_MII, csr); /* deassert CS */
/* Issue erase command. */
csr |= TLP_SROM_CS;
WRITE_CSR(TLP_SROM_MII, csr); /* assert CS */
shift_srom_bits(sc, 7, 4); /* issue erase cmd */
shift_srom_bits(sc, addr, 6); /* issue address */
csr &= ~TLP_SROM_CS;
WRITE_CSR(TLP_SROM_MII, csr); /* deassert CS */
/* Issue write command. */
csr |= TLP_SROM_CS;
WRITE_CSR(TLP_SROM_MII, csr); /* assert CS */
for (i=0; i<10; i++) /* 100 ms max wait */
if ((READ_CSR(TLP_SROM_MII) & TLP_SROM_DOUT)==0) SLEEP(10000);
shift_srom_bits(sc, 5, 4); /* issue write cmd */
shift_srom_bits(sc, addr, 6); /* issue address */
shift_srom_bits(sc, data, 16); /* issue data */
csr &= ~TLP_SROM_CS;
WRITE_CSR(TLP_SROM_MII, csr); /* deassert CS */
/* Issue write-disable command. */
csr |= TLP_SROM_CS;
WRITE_CSR(TLP_SROM_MII, csr); /* assert CS */
for (i=0; i<10; i++) /* 100 ms max wait */
if ((READ_CSR(TLP_SROM_MII) & TLP_SROM_DOUT)==0) SLEEP(10000);
shift_srom_bits(sc, 4, 4); /* issue write disable cmd */
shift_srom_bits(sc, 0, 6); /* issue address */
csr &= ~TLP_SROM_CS;
WRITE_CSR(TLP_SROM_MII, csr); /* deassert CS */
/* Disable SROM access. */
WRITE_CSR(TLP_SROM_MII, TLP_MII_MDOE);
}
/* Not all boards have BIOS roms. */
/* The BIOS ROM is an AMD 29F010 1Mbit (128K by 8) EEPROM. */
static u_int8_t
read_bios(softc_t *sc, u_int32_t addr)
{
u_int32_t srom_mii;
/* Load the BIOS rom address register. */
WRITE_CSR(TLP_BIOS_ROM, addr);
/* Enable the BIOS rom. */
srom_mii = TLP_BIOS_SEL | TLP_BIOS_RD | TLP_MII_MDOE;
WRITE_CSR(TLP_SROM_MII, srom_mii);
/* Wait at least 20 PCI cycles. */
DELAY(20);
/* Read the BIOS rom data. */
srom_mii = READ_CSR(TLP_SROM_MII);
/* Disable the BIOS rom. */
WRITE_CSR(TLP_SROM_MII, TLP_MII_MDOE);
return (u_int8_t)srom_mii & 0xFF;
}
static void
write_bios_phys(softc_t *sc, u_int32_t addr, u_int8_t data)
{
u_int32_t srom_mii;
/* Load the BIOS rom address register. */
WRITE_CSR(TLP_BIOS_ROM, addr);
/* Enable the BIOS rom. */
srom_mii = TLP_BIOS_SEL | TLP_BIOS_WR | TLP_MII_MDOE;
/* Load the data into the data register. */
srom_mii = (srom_mii & 0xFFFFFF00) | (data & 0xFF);
WRITE_CSR(TLP_SROM_MII, srom_mii);
/* Wait at least 20 PCI cycles. */
DELAY(20);
/* Disable the BIOS rom. */
WRITE_CSR(TLP_SROM_MII, TLP_MII_MDOE);
}
/* IOCTL SYSCALL: can sleep. */
static void
write_bios(softc_t *sc, u_int32_t addr, u_int8_t data)
{
u_int8_t read_data;
/* this sequence enables writing */
write_bios_phys(sc, 0x5555, 0xAA);
write_bios_phys(sc, 0x2AAA, 0x55);
write_bios_phys(sc, 0x5555, 0xA0);
write_bios_phys(sc, addr, data);
/* Wait for the write operation to complete. */
for (;;) /* interruptable syscall */
{
for (;;)
{
read_data = read_bios(sc, addr);
if ((read_data & 0x80) == (data & 0x80)) break;
if (read_data & 0x20)
{ /* Data sheet says read it again. */
read_data = read_bios(sc, addr);
if ((read_data & 0x80) == (data & 0x80)) break;
if (DRIVER_DEBUG)
printf("%s: write_bios() failed; rom addr=0x%x\n",
NAME_UNIT, addr);
return;
}
}
read_data = read_bios(sc, addr);
if (read_data == data) break;
}
}
/* IOCTL SYSCALL: can sleep. */
static void
erase_bios(softc_t *sc)
{
unsigned char read_data;
/* This sequence enables erasing: */
write_bios_phys(sc, 0x5555, 0xAA);
write_bios_phys(sc, 0x2AAA, 0x55);
write_bios_phys(sc, 0x5555, 0x80);
write_bios_phys(sc, 0x5555, 0xAA);
write_bios_phys(sc, 0x2AAA, 0x55);
write_bios_phys(sc, 0x5555, 0x10);
/* Wait for the erase operation to complete. */
for (;;) /* interruptable syscall */
{
for (;;)
{
read_data = read_bios(sc, 0);
if (read_data & 0x80) break;
if (read_data & 0x20)
{ /* Data sheet says read it again. */
read_data = read_bios(sc, 0);
if (read_data & 0x80) break;
if (DRIVER_DEBUG)
printf("%s: erase_bios() failed\n", NAME_UNIT);
return;
}
}
read_data = read_bios(sc, 0);
if (read_data == 0xFF) break;
}
}
/* MDIO is 3-stated between tranactions. */
/* MDIO is set up before the RISING edge of MDC; MDC is parked low. */
static void
shift_mii_bits(softc_t *sc, u_int32_t data, u_int32_t len)
{
u_int32_t csr = READ_CSR(TLP_SROM_MII);
for (; len>0; len--)
{ /* MSB first */
if (data & (1<<(len-1)))
csr |= TLP_MII_MDOUT; /* MDOUT setup */
else
csr &= ~TLP_MII_MDOUT; /* MDOUT setup */
WRITE_CSR(TLP_SROM_MII, csr);
csr |= TLP_MII_MDC; /* MDC rising edge */
WRITE_CSR(TLP_SROM_MII, csr);
csr &= ~TLP_MII_MDC; /* MDC falling edge */
WRITE_CSR(TLP_SROM_MII, csr);
}
}
/* The specification for the MII is IEEE Std 802.3 clause 22. */
/* MDIO is sampled on the RISING edge of MDC; MDC is parked low. */
static u_int16_t
read_mii(softc_t *sc, u_int8_t regad)
{
int i;
u_int32_t csr;
u_int16_t data = 0;
WRITE_CSR(TLP_SROM_MII, TLP_MII_MDOUT);
shift_mii_bits(sc, 0xFFFFF, 20); /* preamble */
shift_mii_bits(sc, 0xFFFFF, 20); /* preamble */
shift_mii_bits(sc, 1, 2); /* start symbol */
shift_mii_bits(sc, 2, 2); /* read op */
shift_mii_bits(sc, 0, 5); /* phyad=0 */
shift_mii_bits(sc, regad, 5); /* regad */
csr = READ_CSR(TLP_SROM_MII);
csr |= TLP_MII_MDOE;
WRITE_CSR(TLP_SROM_MII, csr);
shift_mii_bits(sc, 0, 2); /* turn-around */
for (i=15; i>=0; i--) /* data */
{ /* MSB first */
csr = READ_CSR(TLP_SROM_MII); /* MDIN sampled */
data = (data<<1) | ((csr & TLP_MII_MDIN) ? 1:0);
csr |= TLP_MII_MDC; /* MDC rising edge */
WRITE_CSR(TLP_SROM_MII, csr);
csr &= ~TLP_MII_MDC; /* MDC falling edge */
WRITE_CSR(TLP_SROM_MII, csr);
}
return data;
}
static void
write_mii(softc_t *sc, u_int8_t regad, u_int16_t data)
{
WRITE_CSR(TLP_SROM_MII, TLP_MII_MDOUT);
shift_mii_bits(sc, 0xFFFFF, 20); /* preamble */
shift_mii_bits(sc, 0xFFFFF, 20); /* preamble */
shift_mii_bits(sc, 1, 2); /* start symbol */
shift_mii_bits(sc, 1, 2); /* write op */
shift_mii_bits(sc, 0, 5); /* phyad=0 */
shift_mii_bits(sc, regad, 5); /* regad */
shift_mii_bits(sc, 2, 2); /* turn-around */
shift_mii_bits(sc, data, 16); /* data */
WRITE_CSR(TLP_SROM_MII, TLP_MII_MDOE);
if (regad == 16) sc->led_state = data; /* a small optimization */
}
static void
set_mii16_bits(softc_t *sc, u_int16_t bits)
{
u_int16_t mii16 = read_mii(sc, 16);
mii16 |= bits;
write_mii(sc, 16, mii16);
}
static void
clr_mii16_bits(softc_t *sc, u_int16_t bits)
{
u_int16_t mii16 = read_mii(sc, 16);
mii16 &= ~bits;
write_mii(sc, 16, mii16);
}
static void
set_mii17_bits(softc_t *sc, u_int16_t bits)
{
u_int16_t mii17 = read_mii(sc, 17);
mii17 |= bits;
write_mii(sc, 17, mii17);
}
static void
clr_mii17_bits(softc_t *sc, u_int16_t bits)
{
u_int16_t mii17 = read_mii(sc, 17);
mii17 &= ~bits;
write_mii(sc, 17, mii17);
}
/*
* Watchdog code is more readable if it refreshes LEDs
* once a second whether they need it or not.
* But MII refs take 150 uSecs each, so remember the last value
* written to MII16 and avoid LED writes that do nothing.
*/
static void
led_off(softc_t *sc, u_int16_t led)
{
if ((led & sc->led_state) == led) return;
set_mii16_bits(sc, led);
}
static void
led_on(softc_t *sc, u_int16_t led)
{
if ((led & sc->led_state) == 0) return;
clr_mii16_bits(sc, led);
}
static void
led_inv(softc_t *sc, u_int16_t led)
{
u_int16_t mii16 = read_mii(sc, 16);
mii16 ^= led;
write_mii(sc, 16, mii16);
}
/*
* T1 & T3 framer registers are accessed through MII regs 17 & 18.
* Write the address to MII reg 17 then R/W data through MII reg 18.
* The hardware interface is an Intel-style 8-bit muxed A/D bus.
*/
static void
write_framer(softc_t *sc, u_int16_t addr, u_int8_t data)
{
write_mii(sc, 17, addr);
write_mii(sc, 18, data);
}
static u_int8_t
read_framer(softc_t *sc, u_int16_t addr)
{
write_mii(sc, 17, addr);
return (u_int8_t)read_mii(sc, 18);
}
/* Tulip's hardware implementation of General Purpose IO
* (GPIO) pins makes life difficult for software.
* Bits 7-0 in the Tulip GPIO CSR are used for two purposes
* depending on the state of bit 8.
* If bit 8 is 0 then bits 7-0 are "data" bits.
* If bit 8 is 1 then bits 7-0 are "direction" bits.
* If a direction bit is one, the data bit is an output.
* The problem is that the direction bits are WRITE-ONLY.
* Software must remember the direction bits in a shadow copy.
* (sc->gpio_dir) in order to change some but not all of the bits.
* All accesses to the Tulip GPIO register use these five procedures.
*/
static void
make_gpio_input(softc_t *sc, u_int32_t bits)
{
sc->gpio_dir &= ~bits;
WRITE_CSR(TLP_GPIO, TLP_GPIO_DIR | (sc->gpio_dir));
}
static void
make_gpio_output(softc_t *sc, u_int32_t bits)
{
sc->gpio_dir |= bits;
WRITE_CSR(TLP_GPIO, TLP_GPIO_DIR | (sc->gpio_dir));
}
static u_int32_t
read_gpio(softc_t *sc)
{
return READ_CSR(TLP_GPIO);
}
static void
set_gpio_bits(softc_t *sc, u_int32_t bits)
{
WRITE_CSR(TLP_GPIO, (read_gpio(sc) | bits) & 0xFF);
}
static void
clr_gpio_bits(softc_t *sc, u_int32_t bits)
{
WRITE_CSR(TLP_GPIO, (read_gpio(sc) & ~bits) & 0xFF);
}
/* Reset ALL of the flip-flops in the gate array to zero. */
/* This does NOT change the gate array programming. */
/* Called during initialization so it must not sleep. */
static void
reset_xilinx(softc_t *sc)
{
/* Drive RESET low to force initialization. */
clr_gpio_bits(sc, GPIO_RESET);
make_gpio_output(sc, GPIO_RESET);
/* Hold RESET low for more than 10 uSec. */
DELAY(50);
/* Done with RESET; make it an input. */
make_gpio_input(sc, GPIO_RESET);
}
/* Load Xilinx gate array program from on-board rom. */
/* This changes the gate array programming. */
/* IOCTL SYSCALL: can sleep. */
static void
load_xilinx_from_rom(softc_t *sc)
{
int i;
/* Drive MODE low to load from ROM rather than GPIO. */
clr_gpio_bits(sc, GPIO_MODE);
make_gpio_output(sc, GPIO_MODE);
/* Drive DP & RESET low to force configuration. */
clr_gpio_bits(sc, GPIO_RESET | GPIO_DP);
make_gpio_output(sc, GPIO_RESET | GPIO_DP);
/* Hold RESET & DP low for more than 10 uSec. */
DELAY(50);
/* Done with RESET & DP; make them inputs. */
make_gpio_input(sc, GPIO_DP | GPIO_RESET);
/* BUSY-WAIT for Xilinx chip to configure itself from ROM bits. */
for (i=0; i<100; i++) /* 1 sec max delay */
if ((read_gpio(sc) & GPIO_DP) == 0) SLEEP(10000);
/* Done with MODE; make it an input. */
make_gpio_input(sc, GPIO_MODE);
}
/* Load the Xilinx gate array program from userland bits. */
/* This changes the gate array programming. */
/* IOCTL SYSCALL: can sleep. */
static int
load_xilinx_from_file(softc_t *sc, char *addr, u_int32_t len)
{
char *data;
int i, j, error;
/* Get some pages to hold the Xilinx bits; biggest file is < 6 KB. */
if (len > 8192) return EFBIG; /* too big */
data = malloc(len, M_DEVBUF, M_WAITOK);
if (data == NULL) return ENOMEM;
/* Copy the Xilinx bits from userland. */
if ((error = copyin(addr, data, len)))
{
free(data, M_DEVBUF);
return error;
}
/* Drive MODE high to load from GPIO rather than ROM. */
set_gpio_bits(sc, GPIO_MODE);
make_gpio_output(sc, GPIO_MODE);
/* Drive DP & RESET low to force configuration. */
clr_gpio_bits(sc, GPIO_RESET | GPIO_DP);
make_gpio_output(sc, GPIO_RESET | GPIO_DP);
/* Hold RESET & DP low for more than 10 uSec. */
DELAY(50);
/* Done with RESET & DP; make them inputs. */
make_gpio_input(sc, GPIO_RESET | GPIO_DP);
/* BUSY-WAIT for Xilinx chip to clear its config memory. */
make_gpio_input(sc, GPIO_INIT);
for (i=0; i<10000; i++) /* 1 sec max delay */
if ((read_gpio(sc) & GPIO_INIT)==0) SLEEP(10000);
/* Configure CLK and DATA as outputs. */
set_gpio_bits(sc, GPIO_CLK); /* park CLK high */
make_gpio_output(sc, GPIO_CLK | GPIO_DATA);
/* Write bits to Xilinx; CLK is parked HIGH. */
/* DATA is set up before the RISING edge of CLK. */
for (i=0; i<len; i++)
for (j=0; j<8; j++)
{ /* LSB first */
if ((data[i] & (1<<j)) != 0)
set_gpio_bits(sc, GPIO_DATA); /* DATA setup */
else
clr_gpio_bits(sc, GPIO_DATA); /* DATA setup */
clr_gpio_bits(sc, GPIO_CLK); /* CLK falling edge */
set_gpio_bits(sc, GPIO_CLK); /* CLK rising edge */
}
/* Stop driving all Xilinx-related signals. */
/* Pullup and pulldown resistors take over. */
make_gpio_input(sc, GPIO_CLK | GPIO_DATA | GPIO_MODE);
free(data, M_DEVBUF);
return 0;
}
/* Write fragments of a command into the synthesized oscillator. */
/* DATA is set up before the RISING edge of CLK. CLK is parked low. */
static void
shift_synth_bits(softc_t *sc, u_int32_t data, u_int32_t len)
{
int i;
for (i=0; i<len; i++)
{ /* LSB first */
if ((data & (1<<i)) != 0)
set_gpio_bits(sc, GPIO_DATA); /* DATA setup */
else
clr_gpio_bits(sc, GPIO_DATA); /* DATA setup */
set_gpio_bits(sc, GPIO_CLK); /* CLK rising edge */
clr_gpio_bits(sc, GPIO_CLK); /* CLK falling edge */
}
}
/* Write a command to the synthesized oscillator on SSI and HSSIc. */
static void
write_synth(softc_t *sc, struct synth *synth)
{
/* SSI cards have a programmable prescaler */
if (sc->status.card_type == TLP_CSID_SSI)
{
if (synth->prescale == 9) /* divide by 512 */
set_mii17_bits(sc, MII17_SSI_PRESCALE);
else /* divide by 32 */
clr_mii17_bits(sc, MII17_SSI_PRESCALE);
}
clr_gpio_bits(sc, GPIO_DATA | GPIO_CLK);
make_gpio_output(sc, GPIO_DATA | GPIO_CLK);
/* SYNTH is a low-true chip enable for the AV9110 chip. */
set_gpio_bits(sc, GPIO_SSI_SYNTH);
make_gpio_output(sc, GPIO_SSI_SYNTH);
clr_gpio_bits(sc, GPIO_SSI_SYNTH);
/* Serially shift the command into the AV9110 chip. */
shift_synth_bits(sc, synth->n, 7);
shift_synth_bits(sc, synth->m, 7);
shift_synth_bits(sc, synth->v, 1);
shift_synth_bits(sc, synth->x, 2);
shift_synth_bits(sc, synth->r, 2);
shift_synth_bits(sc, 0x16, 5); /* enable clk/x output */
/* SYNTH (chip enable) going high ends the command. */
set_gpio_bits(sc, GPIO_SSI_SYNTH);
make_gpio_input(sc, GPIO_SSI_SYNTH);
/* Stop driving serial-related signals; pullups/pulldowns take over. */
make_gpio_input(sc, GPIO_DATA | GPIO_CLK);
/* remember the new synthesizer parameters */
if (&sc->config.synth != synth) sc->config.synth = *synth;
}
/* Write a command to the DAC controlling the VCXO on some T3 adapters. */
/* The DAC is a TI-TLV5636: 12-bit resolution and a serial interface. */
/* DATA is set up before the FALLING edge of CLK. CLK is parked HIGH. */
static void
write_dac(softc_t *sc, u_int16_t data)
{
int i;
/* Prepare to use DATA and CLK. */
set_gpio_bits(sc, GPIO_DATA | GPIO_CLK);
make_gpio_output(sc, GPIO_DATA | GPIO_CLK);
/* High-to-low transition prepares DAC for new value. */
set_gpio_bits(sc, GPIO_T3_DAC);
make_gpio_output(sc, GPIO_T3_DAC);
clr_gpio_bits(sc, GPIO_T3_DAC);
/* Serially shift command bits into DAC. */
for (i=0; i<16; i++)
{ /* MSB first */
if ((data & (1<<(15-i))) != 0)
set_gpio_bits(sc, GPIO_DATA); /* DATA setup */
else
clr_gpio_bits(sc, GPIO_DATA); /* DATA setup */
clr_gpio_bits(sc, GPIO_CLK); /* CLK falling edge */
set_gpio_bits(sc, GPIO_CLK); /* CLK rising edge */
}
/* Done with DAC; make it an input; loads new value into DAC. */
set_gpio_bits(sc, GPIO_T3_DAC);
make_gpio_input(sc, GPIO_T3_DAC);
/* Stop driving serial-related signals; pullups/pulldowns take over. */
make_gpio_input(sc, GPIO_DATA | GPIO_CLK);
}
/* begin HSSI card code */
/* Must not sleep. */
static void
hssi_config(softc_t *sc)
{
if (sc->status.card_type == 0)
{ /* defaults */
sc->status.card_type = READ_PCI_CFG(sc, TLP_CSID);
sc->config.crc_len = CFG_CRC_16;
sc->config.loop_back = CFG_LOOP_NONE;
sc->config.tx_clk_src = CFG_CLKMUX_ST;
sc->config.dte_dce = CFG_DTE;
sc->config.synth.n = 52; /* 52.000 Mbs */
sc->config.synth.m = 5;
sc->config.synth.v = 0;
sc->config.synth.x = 0;
sc->config.synth.r = 0;
sc->config.synth.prescale = 2;
}
/* set CRC length */
if (sc->config.crc_len == CFG_CRC_32)
set_mii16_bits(sc, MII16_HSSI_CRC32);
else
clr_mii16_bits(sc, MII16_HSSI_CRC32);
/* Assert pin LA in HSSI conn: ask modem for local loop. */
if (sc->config.loop_back == CFG_LOOP_LL)
set_mii16_bits(sc, MII16_HSSI_LA);
else
clr_mii16_bits(sc, MII16_HSSI_LA);
/* Assert pin LB in HSSI conn: ask modem for remote loop. */
if (sc->config.loop_back == CFG_LOOP_RL)
set_mii16_bits(sc, MII16_HSSI_LB);
else
clr_mii16_bits(sc, MII16_HSSI_LB);
if (sc->status.card_type == TLP_CSID_HSSI)
{
/* set TXCLK src */
if (sc->config.tx_clk_src == CFG_CLKMUX_ST)
set_gpio_bits(sc, GPIO_HSSI_TXCLK);
else
clr_gpio_bits(sc, GPIO_HSSI_TXCLK);
make_gpio_output(sc, GPIO_HSSI_TXCLK);
}
else if (sc->status.card_type == TLP_CSID_HSSIc)
{ /* cPCI HSSI rev C has extra features */
/* Set TXCLK source. */
u_int16_t mii16 = read_mii(sc, 16);
mii16 &= ~MII16_HSSI_CLKMUX;
mii16 |= (sc->config.tx_clk_src&3)<<13;
write_mii(sc, 16, mii16);
/* cPCI HSSI implements loopback towards the net. */
if (sc->config.loop_back == CFG_LOOP_LINE)
set_mii16_bits(sc, MII16_HSSI_LOOP);
else
clr_mii16_bits(sc, MII16_HSSI_LOOP);
/* Set DTE/DCE mode. */
if (sc->config.dte_dce == CFG_DCE)
set_gpio_bits(sc, GPIO_HSSI_DCE);
else
clr_gpio_bits(sc, GPIO_HSSI_DCE);
make_gpio_output(sc, GPIO_HSSI_DCE);
/* Program the synthesized oscillator. */
write_synth(sc, &sc->config.synth);
}
}
static void
hssi_ident(softc_t *sc)
{
}
/* Called once a second; must not sleep. */
static int
hssi_watchdog(softc_t *sc)
{
u_int16_t mii16 = read_mii(sc, 16) & MII16_HSSI_MODEM;
int link_status = STATUS_UP;
led_inv(sc, MII16_HSSI_LED_UL); /* Software is alive. */
led_on(sc, MII16_HSSI_LED_LL); /* always on (SSI cable) */
/* Check the transmit clock. */
if (sc->status.tx_speed == 0)
{
led_on(sc, MII16_HSSI_LED_UR);
link_status = STATUS_DOWN;
}
else
led_off(sc, MII16_HSSI_LED_UR);
/* Is the modem ready? */
if ((mii16 & MII16_HSSI_CA) == 0)
{
led_off(sc, MII16_HSSI_LED_LR);
link_status = STATUS_DOWN;
}
else
led_on(sc, MII16_HSSI_LED_LR);
/* Print the modem control signals if they changed. */
if ((DRIVER_DEBUG) && (mii16 != sc->last_mii16))
{
char *on = "ON ", *off = "OFF";
printf("%s: TA=%s CA=%s LA=%s LB=%s LC=%s TM=%s\n", NAME_UNIT,
(mii16 & MII16_HSSI_TA) ? on : off,
(mii16 & MII16_HSSI_CA) ? on : off,
(mii16 & MII16_HSSI_LA) ? on : off,
(mii16 & MII16_HSSI_LB) ? on : off,
(mii16 & MII16_HSSI_LC) ? on : off,
(mii16 & MII16_HSSI_TM) ? on : off);
}
/* SNMP one-second-report */
sc->status.snmp.hssi.sigs = mii16 & MII16_HSSI_MODEM;
/* Remember this state until next time. */
sc->last_mii16 = mii16;
/* If a loop back is in effect, link status is UP */
if (sc->config.loop_back != CFG_LOOP_NONE)
link_status = STATUS_UP;
return link_status;
}
/* IOCTL SYSCALL: can sleep (but doesn't). */
static int
hssi_ioctl(softc_t *sc, struct ioctl *ioctl)
{
int error = 0;
if (ioctl->cmd == IOCTL_SNMP_SIGS)
{
u_int16_t mii16 = read_mii(sc, 16);
mii16 &= ~MII16_HSSI_MODEM;
mii16 |= (MII16_HSSI_MODEM & ioctl->data);
write_mii(sc, 16, mii16);
}
else if (ioctl->cmd == IOCTL_SET_STATUS)
{
if (ioctl->data != 0)
set_mii16_bits(sc, MII16_HSSI_TA);
else
clr_mii16_bits(sc, MII16_HSSI_TA);
}
else
error = EINVAL;
return error;
}
/* begin DS3 card code */
/* Must not sleep. */
static void
t3_config(softc_t *sc)
{
int i;
u_int8_t ctl1;
if (sc->status.card_type == 0)
{ /* defaults */
sc->status.card_type = TLP_CSID_T3;
sc->config.crc_len = CFG_CRC_16;
sc->config.loop_back = CFG_LOOP_NONE;
sc->config.format = CFG_FORMAT_T3CPAR;
sc->config.cable_len = 10; /* meters */
sc->config.scrambler = CFG_SCRAM_DL_KEN;
sc->config.tx_clk_src = CFG_CLKMUX_INT;
/* Center the VCXO -- get within 20 PPM of 44736000. */
write_dac(sc, 0x9002); /* set Vref = 2.048 volts */
write_dac(sc, 2048); /* range is 0..4095 */
}
/* Set cable length. */
if (sc->config.cable_len > 30)
clr_mii16_bits(sc, MII16_DS3_ZERO);
else
set_mii16_bits(sc, MII16_DS3_ZERO);
/* Set payload scrambler polynomial. */
if (sc->config.scrambler == CFG_SCRAM_LARS)
set_mii16_bits(sc, MII16_DS3_POLY);
else
clr_mii16_bits(sc, MII16_DS3_POLY);
/* Set payload scrambler on/off. */
if (sc->config.scrambler == CFG_SCRAM_OFF)
clr_mii16_bits(sc, MII16_DS3_SCRAM);
else
set_mii16_bits(sc, MII16_DS3_SCRAM);
/* Set CRC length. */
if (sc->config.crc_len == CFG_CRC_32)
set_mii16_bits(sc, MII16_DS3_CRC32);
else
clr_mii16_bits(sc, MII16_DS3_CRC32);
/* Loopback towards host thru the line interface. */
if (sc->config.loop_back == CFG_LOOP_OTHER)
set_mii16_bits(sc, MII16_DS3_TRLBK);
else
clr_mii16_bits(sc, MII16_DS3_TRLBK);
/* Loopback towards network thru the line interface. */
if (sc->config.loop_back == CFG_LOOP_LINE)
set_mii16_bits(sc, MII16_DS3_LNLBK);
else if (sc->config.loop_back == CFG_LOOP_DUAL)
set_mii16_bits(sc, MII16_DS3_LNLBK);
else
clr_mii16_bits(sc, MII16_DS3_LNLBK);
/* Configure T3 framer chip; write EVERY writeable register. */
ctl1 = CTL1_SER | CTL1_XTX;
if (sc->config.loop_back == CFG_LOOP_INWARD) ctl1 |= CTL1_3LOOP;
if (sc->config.loop_back == CFG_LOOP_DUAL) ctl1 |= CTL1_3LOOP;
if (sc->config.format == CFG_FORMAT_T3M13) ctl1 |= CTL1_M13MODE;
write_framer(sc, T3CSR_CTL1, ctl1);
write_framer(sc, T3CSR_TX_FEAC, CTL5_EMODE);
write_framer(sc, T3CSR_CTL8, CTL8_FBEC);
write_framer(sc, T3CSR_CTL12, CTL12_DLCB1 | CTL12_C21 | CTL12_MCB1);
write_framer(sc, T3CSR_DBL_FEAC, 0);
write_framer(sc, T3CSR_CTL14, CTL14_RGCEN | CTL14_TGCEN);
write_framer(sc, T3CSR_INTEN, 0);
write_framer(sc, T3CSR_CTL20, CTL20_CVEN);
/* Clear error counters and latched error bits */
/* that may have happened while initializing. */
for (i=0; i<21; i++) read_framer(sc, i);
}
static void
t3_ident(softc_t *sc)
{
printf(", TXC03401 rev B");
}
/* Called once a second; must not sleep. */
static int
t3_watchdog(softc_t *sc)
{
u_int16_t CV;
u_int8_t CERR, PERR, MERR, FERR, FEBE;
u_int8_t ctl1, stat16, feac;
int link_status = STATUS_UP;
u_int16_t mii16;
/* Read the alarm registers. */
ctl1 = read_framer(sc, T3CSR_CTL1);
stat16 = read_framer(sc, T3CSR_STAT16);
mii16 = read_mii(sc, 16);
/* Always ignore the RTLOC alarm bit. */
stat16 &= ~STAT16_RTLOC;
/* Software is alive. */
led_inv(sc, MII16_DS3_LED_GRN);
/* Receiving Alarm Indication Signal (AIS). */
if ((stat16 & STAT16_RAIS) != 0) /* receiving ais */
led_on(sc, MII16_DS3_LED_BLU);
else if (ctl1 & CTL1_TXAIS) /* sending ais */
led_inv(sc, MII16_DS3_LED_BLU);
else
led_off(sc, MII16_DS3_LED_BLU);
/* Receiving Remote Alarm Indication (RAI). */
if ((stat16 & STAT16_XERR) != 0) /* receiving rai */
led_on(sc, MII16_DS3_LED_YEL);
else if ((ctl1 & CTL1_XTX) == 0) /* sending rai */
led_inv(sc, MII16_DS3_LED_YEL);
else
led_off(sc, MII16_DS3_LED_YEL);
/* If certain status bits are set then the link is 'down'. */
/* The bad bits are: rxlos rxoof rxais rxidl xerr. */
if ((stat16 & ~(STAT16_FEAC | STAT16_SEF)) != 0)
link_status = STATUS_DOWN;
/* Declare local Red Alarm if the link is down. */
if (link_status == STATUS_DOWN)
led_on(sc, MII16_DS3_LED_RED);
else if (sc->loop_timer != 0) /* loopback is active */
led_inv(sc, MII16_DS3_LED_RED);
else
led_off(sc, MII16_DS3_LED_RED);
/* Print latched error bits if they changed. */
if ((DRIVER_DEBUG) && ((stat16 & ~STAT16_FEAC) != sc->last_stat16))
{
char *on = "ON ", *off = "OFF";
printf("%s: RLOS=%s ROOF=%s RAIS=%s RIDL=%s SEF=%s XERR=%s\n",
NAME_UNIT,
(stat16 & STAT16_RLOS) ? on : off,
(stat16 & STAT16_ROOF) ? on : off,
(stat16 & STAT16_RAIS) ? on : off,
(stat16 & STAT16_RIDL) ? on : off,
(stat16 & STAT16_SEF) ? on : off,
(stat16 & STAT16_XERR) ? on : off);
}
/* Check and print error counters if non-zero. */
CV = read_framer(sc, T3CSR_CVHI)<<8;
CV += read_framer(sc, T3CSR_CVLO);
PERR = read_framer(sc, T3CSR_PERR);
CERR = read_framer(sc, T3CSR_CERR);
FERR = read_framer(sc, T3CSR_FERR);
MERR = read_framer(sc, T3CSR_MERR);
FEBE = read_framer(sc, T3CSR_FEBE);
/* CV is invalid during LOS. */
if ((stat16 & STAT16_RLOS)!=0) CV = 0;
/* CERR & FEBE are invalid in M13 mode */
if (sc->config.format == CFG_FORMAT_T3M13) CERR = FEBE = 0;
/* FEBE is invalid during AIS. */
if ((stat16 & STAT16_RAIS)!=0) FEBE = 0;
if (DRIVER_DEBUG && (CV || PERR || CERR || FERR || MERR || FEBE))
printf("%s: CV=%u PERR=%u CERR=%u FERR=%u MERR=%u FEBE=%u\n",
NAME_UNIT, CV, PERR, CERR, FERR, MERR, FEBE);
/* Driver keeps crude link-level error counters (SNMP is better). */
sc->status.cntrs.lcv_errs += CV;
sc->status.cntrs.par_errs += PERR;
sc->status.cntrs.cpar_errs += CERR;
sc->status.cntrs.frm_errs += FERR;
sc->status.cntrs.mfrm_errs += MERR;
sc->status.cntrs.febe_errs += FEBE;
/* Check for FEAC messages (FEAC not defined in M13 mode). */
if (FORMAT_T3CPAR && (stat16 & STAT16_FEAC)) do
{
feac = read_framer(sc, T3CSR_FEAC_STK);
if ((feac & FEAC_STK_VALID)==0) break;
/* Ignore RxFEACs while a far end loopback has been requested. */
if ((sc->status.snmp.t3.line & TLOOP_FAR_LINE)!=0) continue;
switch (feac & FEAC_STK_FEAC)
{
case T3BOP_LINE_UP: break;
case T3BOP_LINE_DOWN: break;
case T3BOP_LOOP_DS3:
{
if (sc->last_FEAC == T3BOP_LINE_DOWN)
{
if (DRIVER_DEBUG)
printf("%s: Received a 'line loopback deactivate' FEAC msg\n", NAME_UNIT);
clr_mii16_bits(sc, MII16_DS3_LNLBK);
sc->loop_timer = 0;
}
if (sc->last_FEAC == T3BOP_LINE_UP)
{
if (DRIVER_DEBUG)
printf("%s: Received a 'line loopback activate' FEAC msg\n", NAME_UNIT);
set_mii16_bits(sc, MII16_DS3_LNLBK);
sc->loop_timer = 300;
}
break;
}
case T3BOP_OOF:
{
if (DRIVER_DEBUG)
printf("%s: Received a 'far end LOF' FEAC msg\n", NAME_UNIT);
break;
}
case T3BOP_IDLE:
{
if (DRIVER_DEBUG)
printf("%s: Received a 'far end IDL' FEAC msg\n", NAME_UNIT);
break;
}
case T3BOP_AIS:
{
if (DRIVER_DEBUG)
printf("%s: Received a 'far end AIS' FEAC msg\n", NAME_UNIT);
break;
}
case T3BOP_LOS:
{
if (DRIVER_DEBUG)
printf("%s: Received a 'far end LOS' FEAC msg\n", NAME_UNIT);
break;
}
default:
{
if (DRIVER_DEBUG)
printf("%s: Received a 'type 0x%02X' FEAC msg\n", NAME_UNIT, feac & FEAC_STK_FEAC);
break;
}
}
sc->last_FEAC = feac & FEAC_STK_FEAC;
} while ((feac & FEAC_STK_MORE) != 0);
stat16 &= ~STAT16_FEAC;
/* Send Service-Affecting priority FEAC messages */
if (((sc->last_stat16 ^ stat16) & 0xF0) && (FORMAT_T3CPAR))
{
/* Transmit continuous FEACs */
write_framer(sc, T3CSR_CTL14,
read_framer(sc, T3CSR_CTL14) & ~CTL14_FEAC10);
if ((stat16 & STAT16_RLOS)!=0)
write_framer(sc, T3CSR_TX_FEAC, 0xC0 + T3BOP_LOS);
else if ((stat16 & STAT16_ROOF)!=0)
write_framer(sc, T3CSR_TX_FEAC, 0xC0 + T3BOP_OOF);
else if ((stat16 & STAT16_RAIS)!=0)
write_framer(sc, T3CSR_TX_FEAC, 0xC0 + T3BOP_AIS);
else if ((stat16 & STAT16_RIDL)!=0)
write_framer(sc, T3CSR_TX_FEAC, 0xC0 + T3BOP_IDLE);
else
write_framer(sc, T3CSR_TX_FEAC, CTL5_EMODE);
}
/* Start sending RAI, Remote Alarm Indication. */
if (((stat16 & STAT16_ROOF)!=0) && ((stat16 & STAT16_RLOS)==0) &&
((sc->last_stat16 & STAT16_ROOF)==0))
write_framer(sc, T3CSR_CTL1, ctl1 &= ~CTL1_XTX);
/* Stop sending RAI, Remote Alarm Indication. */
else if (((stat16 & STAT16_ROOF)==0) && ((sc->last_stat16 & STAT16_ROOF)!=0))
write_framer(sc, T3CSR_CTL1, ctl1 |= CTL1_XTX);
/* Start sending AIS, Alarm Indication Signal */
if (((stat16 & STAT16_RLOS)!=0) && ((sc->last_stat16 & STAT16_RLOS)==0))
{
set_mii16_bits(sc, MII16_DS3_FRAME);
write_framer(sc, T3CSR_CTL1, ctl1 | CTL1_TXAIS);
}
/* Stop sending AIS, Alarm Indication Signal */
else if (((stat16 & STAT16_RLOS)==0) && ((sc->last_stat16 & STAT16_RLOS)!=0))
{
clr_mii16_bits(sc, MII16_DS3_FRAME);
write_framer(sc, T3CSR_CTL1, ctl1 & ~CTL1_TXAIS);
}
/* Time out loopback requests. */
if (sc->loop_timer != 0)
if (--sc->loop_timer == 0)
if ((mii16 & MII16_DS3_LNLBK)!=0)
{
if (DRIVER_DEBUG)
printf("%s: Timeout: Loop Down after 300 seconds\n", NAME_UNIT);
clr_mii16_bits(sc, MII16_DS3_LNLBK); /* line loopback off */
}
/* SNMP error counters */
sc->status.snmp.t3.lcv = CV;
sc->status.snmp.t3.pcv = PERR;
sc->status.snmp.t3.ccv = CERR;
sc->status.snmp.t3.febe = FEBE;
/* SNMP Line Status */
sc->status.snmp.t3.line = 0;
if ((ctl1 & CTL1_XTX)==0) sc->status.snmp.t3.line |= TLINE_TX_RAI;
if (stat16 & STAT16_XERR) sc->status.snmp.t3.line |= TLINE_RX_RAI;
if (ctl1 & CTL1_TXAIS) sc->status.snmp.t3.line |= TLINE_TX_AIS;
if (stat16 & STAT16_RAIS) sc->status.snmp.t3.line |= TLINE_RX_AIS;
if (stat16 & STAT16_ROOF) sc->status.snmp.t3.line |= TLINE_LOF;
if (stat16 & STAT16_RLOS) sc->status.snmp.t3.line |= TLINE_LOS;
if (stat16 & STAT16_SEF) sc->status.snmp.t3.line |= T3LINE_SEF;
/* SNMP Loopback Status */
sc->status.snmp.t3.loop &= ~TLOOP_FAR_LINE;
if (sc->config.loop_back == CFG_LOOP_TULIP)
sc->status.snmp.t3.loop |= TLOOP_NEAR_OTHER;
if (ctl1 & CTL1_3LOOP) sc->status.snmp.t3.loop |= TLOOP_NEAR_INWARD;
if (mii16 & MII16_DS3_TRLBK) sc->status.snmp.t3.loop |= TLOOP_NEAR_OTHER;
if (mii16 & MII16_DS3_LNLBK) sc->status.snmp.t3.loop |= TLOOP_NEAR_LINE;
/*if (ctl12 & CTL12_RTPLOOP) sc->status.snmp.t3.loop |= TLOOP_NEAR_PAYLOAD; */
/* Remember this state until next time. */
sc->last_stat16 = stat16;
/* If an INWARD loopback is in effect, link status is UP */
if (sc->config.loop_back != CFG_LOOP_NONE) /* XXX INWARD ONLY */
link_status = STATUS_UP;
return link_status;
}
/* IOCTL SYSCALL: can sleep. */
static void
t3_send_dbl_feac(softc_t *sc, int feac1, int feac2)
{
u_int8_t tx_feac;
int i;
/* The FEAC transmitter could be sending a continuous */
/* FEAC msg when told to send a double FEAC message. */
/* So save the current state of the FEAC transmitter. */
tx_feac = read_framer(sc, T3CSR_TX_FEAC);
/* Load second FEAC code and stop FEAC transmitter. */
write_framer(sc, T3CSR_TX_FEAC, CTL5_EMODE + feac2);
/* FEAC transmitter sends 10 more FEACs and then stops. */
SLEEP(20000); /* sending one FEAC takes 1700 uSecs */
/* Load first FEAC code and start FEAC transmitter. */
write_framer(sc, T3CSR_DBL_FEAC, CTL13_DFEXEC + feac1);
/* Wait for double FEAC sequence to complete -- about 70 ms. */
for (i=0; i<10; i++) /* max delay 100 ms */
if (read_framer(sc, T3CSR_DBL_FEAC) & CTL13_DFEXEC) SLEEP(10000);
/* Flush received FEACS; don't respond to our own loop cmd! */
while (read_framer(sc, T3CSR_FEAC_STK) & FEAC_STK_VALID) DELAY(1); /* XXX HANG */
/* Restore previous state of the FEAC transmitter. */
/* If it was sending a continous FEAC, it will resume. */
write_framer(sc, T3CSR_TX_FEAC, tx_feac);
}
/* IOCTL SYSCALL: can sleep. */
static int
t3_ioctl(softc_t *sc, struct ioctl *ioctl)
{
int error = 0;
switch (ioctl->cmd)
{
case IOCTL_SNMP_SEND: /* set opstatus? */
{
if (sc->config.format != CFG_FORMAT_T3CPAR)
error = EINVAL;
else if (ioctl->data == TSEND_LINE)
{
sc->status.snmp.t3.loop |= TLOOP_FAR_LINE;
t3_send_dbl_feac(sc, T3BOP_LINE_UP, T3BOP_LOOP_DS3);
}
else if (ioctl->data == TSEND_RESET)
{
t3_send_dbl_feac(sc, T3BOP_LINE_DOWN, T3BOP_LOOP_DS3);
sc->status.snmp.t3.loop &= ~TLOOP_FAR_LINE;
}
else
error = EINVAL;
break;
}
case IOCTL_SNMP_LOOP: /* set opstatus = test? */
{
if (ioctl->data == CFG_LOOP_NONE)
{
clr_mii16_bits(sc, MII16_DS3_FRAME);
clr_mii16_bits(sc, MII16_DS3_TRLBK);
clr_mii16_bits(sc, MII16_DS3_LNLBK);
write_framer(sc, T3CSR_CTL1,
read_framer(sc, T3CSR_CTL1) & ~CTL1_3LOOP);
write_framer(sc, T3CSR_CTL12,
read_framer(sc, T3CSR_CTL12) & ~(CTL12_RTPLOOP | CTL12_RTPLLEN));
}
else if (ioctl->data == CFG_LOOP_LINE)
set_mii16_bits(sc, MII16_DS3_LNLBK);
else if (ioctl->data == CFG_LOOP_OTHER)
set_mii16_bits(sc, MII16_DS3_TRLBK);
else if (ioctl->data == CFG_LOOP_INWARD)
write_framer(sc, T3CSR_CTL1,
read_framer(sc, T3CSR_CTL1) | CTL1_3LOOP);
else if (ioctl->data == CFG_LOOP_DUAL)
{
set_mii16_bits(sc, MII16_DS3_LNLBK);
write_framer(sc, T3CSR_CTL1,
read_framer(sc, T3CSR_CTL1) | CTL1_3LOOP);
}
else if (ioctl->data == CFG_LOOP_PAYLOAD)
{
set_mii16_bits(sc, MII16_DS3_FRAME);
write_framer(sc, T3CSR_CTL12,
read_framer(sc, T3CSR_CTL12) | CTL12_RTPLOOP);
write_framer(sc, T3CSR_CTL12,
read_framer(sc, T3CSR_CTL12) | CTL12_RTPLLEN);
DELAY(25); /* at least two frames (22 uS) */
write_framer(sc, T3CSR_CTL12,
read_framer(sc, T3CSR_CTL12) & ~CTL12_RTPLLEN);
}
else
error = EINVAL;
break;
}
default:
error = EINVAL;
break;
}
return error;
}
/* begin SSI card code */
/* Must not sleep. */
static void
ssi_config(softc_t *sc)
{
if (sc->status.card_type == 0)
{ /* defaults */
sc->status.card_type = TLP_CSID_SSI;
sc->config.crc_len = CFG_CRC_16;
sc->config.loop_back = CFG_LOOP_NONE;
sc->config.tx_clk_src = CFG_CLKMUX_ST;
sc->config.dte_dce = CFG_DTE;
sc->config.synth.n = 51; /* 1.536 MHz */
sc->config.synth.m = 83;
sc->config.synth.v = 1;
sc->config.synth.x = 1;
sc->config.synth.r = 1;
sc->config.synth.prescale = 4;
}
/* Disable the TX clock driver while programming the oscillator. */
clr_gpio_bits(sc, GPIO_SSI_DCE);
make_gpio_output(sc, GPIO_SSI_DCE);
/* Program the synthesized oscillator. */
write_synth(sc, &sc->config.synth);
/* Set DTE/DCE mode. */
/* If DTE mode then DCD & TXC are received. */
/* If DCE mode then DCD & TXC are driven. */
/* Boards with MII rev=4.0 don't drive DCD. */
if (sc->config.dte_dce == CFG_DCE)
set_gpio_bits(sc, GPIO_SSI_DCE);
else
clr_gpio_bits(sc, GPIO_SSI_DCE);
make_gpio_output(sc, GPIO_SSI_DCE);
/* Set CRC length. */
if (sc->config.crc_len == CFG_CRC_32)
set_mii16_bits(sc, MII16_SSI_CRC32);
else
clr_mii16_bits(sc, MII16_SSI_CRC32);
/* Loop towards host thru cable drivers and receivers. */
/* Asserts DCD at the far end of a null modem cable. */
if (sc->config.loop_back == CFG_LOOP_PINS)
set_mii16_bits(sc, MII16_SSI_LOOP);
else
clr_mii16_bits(sc, MII16_SSI_LOOP);
/* Assert pin LL in modem conn: ask modem for local loop. */
/* Asserts TM at the far end of a null modem cable. */
if (sc->config.loop_back == CFG_LOOP_LL)
set_mii16_bits(sc, MII16_SSI_LL);
else
clr_mii16_bits(sc, MII16_SSI_LL);
/* Assert pin RL in modem conn: ask modem for remote loop. */
if (sc->config.loop_back == CFG_LOOP_RL)
set_mii16_bits(sc, MII16_SSI_RL);
else
clr_mii16_bits(sc, MII16_SSI_RL);
}
static void
ssi_ident(softc_t *sc)
{
printf(", LTC1343/44");
}
/* Called once a second; must not sleep. */
static int
ssi_watchdog(softc_t *sc)
{
u_int16_t cable;
u_int16_t mii16 = read_mii(sc, 16) & MII16_SSI_MODEM;
int link_status = STATUS_UP;
/* Software is alive. */
led_inv(sc, MII16_SSI_LED_UL);
/* Check the transmit clock. */
if (sc->status.tx_speed == 0)
{
led_on(sc, MII16_SSI_LED_UR);
link_status = STATUS_DOWN;
}
else
led_off(sc, MII16_SSI_LED_UR);
/* Check the external cable. */
cable = read_mii(sc, 17);
cable = cable & MII17_SSI_CABLE_MASK;
cable = cable >> MII17_SSI_CABLE_SHIFT;
if (cable == 7)
{
led_off(sc, MII16_SSI_LED_LL); /* no cable */
link_status = STATUS_DOWN;
}
else
led_on(sc, MII16_SSI_LED_LL);
/* The unit at the other end of the cable is ready if: */
/* DTE mode and DCD pin is asserted */
/* DCE mode and DSR pin is asserted */
if (((sc->config.dte_dce == CFG_DTE) && ((mii16 & MII16_SSI_DCD)==0)) ||
((sc->config.dte_dce == CFG_DCE) && ((mii16 & MII16_SSI_DSR)==0)))
{
led_off(sc, MII16_SSI_LED_LR);
link_status = STATUS_DOWN;
}
else
led_on(sc, MII16_SSI_LED_LR);
if (DRIVER_DEBUG && (cable != sc->status.cable_type))
printf("%s: SSI cable type changed to '%s'\n",
NAME_UNIT, ssi_cables[cable]);
sc->status.cable_type = cable;
/* Print the modem control signals if they changed. */
if ((DRIVER_DEBUG) && (mii16 != sc->last_mii16))
{
char *on = "ON ", *off = "OFF";
printf("%s: DTR=%s DSR=%s RTS=%s CTS=%s DCD=%s RI=%s LL=%s RL=%s TM=%s\n",
NAME_UNIT,
(mii16 & MII16_SSI_DTR) ? on : off,
(mii16 & MII16_SSI_DSR) ? on : off,
(mii16 & MII16_SSI_RTS) ? on : off,
(mii16 & MII16_SSI_CTS) ? on : off,
(mii16 & MII16_SSI_DCD) ? on : off,
(mii16 & MII16_SSI_RI) ? on : off,
(mii16 & MII16_SSI_LL) ? on : off,
(mii16 & MII16_SSI_RL) ? on : off,
(mii16 & MII16_SSI_TM) ? on : off);
}
/* SNMP one-second report */
sc->status.snmp.ssi.sigs = mii16 & MII16_SSI_MODEM;
/* Remember this state until next time. */
sc->last_mii16 = mii16;
/* If a loop back is in effect, link status is UP */
if (sc->config.loop_back != CFG_LOOP_NONE)
link_status = STATUS_UP;
return link_status;
}
/* IOCTL SYSCALL: can sleep (but doesn't). */
static int
ssi_ioctl(softc_t *sc, struct ioctl *ioctl)
{
int error = 0;
if (ioctl->cmd == IOCTL_SNMP_SIGS)
{
u_int16_t mii16 = read_mii(sc, 16);
mii16 &= ~MII16_SSI_MODEM;
mii16 |= (MII16_SSI_MODEM & ioctl->data);
write_mii(sc, 16, mii16);
}
else if (ioctl->cmd == IOCTL_SET_STATUS)
{
if (ioctl->data != 0)
set_mii16_bits(sc, (MII16_SSI_DTR | MII16_SSI_RTS | MII16_SSI_DCD));
else
clr_mii16_bits(sc, (MII16_SSI_DTR | MII16_SSI_RTS | MII16_SSI_DCD));
}
else
error = EINVAL;
return error;
}
/* begin T1E1 card code */
/* Must not sleep. */
static void
t1_config(softc_t *sc)
{
int i;
u_int8_t pulse, lbo, gain;
if (sc->status.card_type == 0)
{ /* defaults */
sc->status.card_type = TLP_CSID_T1E1;
sc->config.crc_len = CFG_CRC_16;
sc->config.loop_back = CFG_LOOP_NONE;
sc->config.tx_clk_src = CFG_CLKMUX_INT;
sc->config.format = CFG_FORMAT_T1ESF;
sc->config.cable_len = 10;
sc->config.time_slots = 0x01FFFFFE;
sc->config.tx_pulse = CFG_PULSE_AUTO;
sc->config.rx_gain = CFG_GAIN_AUTO;
sc->config.tx_lbo = CFG_LBO_AUTO;
/* Bt8370 occasionally powers up in a loopback mode. */
/* Data sheet says zero LOOP reg and do a s/w reset. */
write_framer(sc, Bt8370_LOOP, 0x00); /* no loopback */
write_framer(sc, Bt8370_CR0, 0x80); /* s/w reset */
for (i=0; i<10; i++) /* max delay 10 ms */
if (read_framer(sc, Bt8370_CR0) & 0x80) DELAY(1000);
}
/* Set CRC length. */
if (sc->config.crc_len == CFG_CRC_32)
set_mii16_bits(sc, MII16_T1_CRC32);
else
clr_mii16_bits(sc, MII16_T1_CRC32);
/* Invert HDLC payload data in SF/AMI mode. */
/* HDLC stuff bits satisfy T1 pulse density. */
if (FORMAT_T1SF)
set_mii16_bits(sc, MII16_T1_INVERT);
else
clr_mii16_bits(sc, MII16_T1_INVERT);
/* Set the transmitter output impedance. */
if (FORMAT_E1ANY) set_mii16_bits(sc, MII16_T1_Z);
/* 001:CR0 -- Control Register 0 - T1/E1 and frame format */
write_framer(sc, Bt8370_CR0, sc->config.format);
/* 002:JAT_CR -- Jitter Attenuator Control Register */
if (sc->config.tx_clk_src == CFG_CLKMUX_RT) /* loop timing */
write_framer(sc, Bt8370_JAT_CR, 0xA3); /* JAT in RX path */
else
{ /* 64-bit elastic store; free-running JCLK and CLADO */
write_framer(sc, Bt8370_JAT_CR, 0x4B); /* assert jcenter */
write_framer(sc, Bt8370_JAT_CR, 0x43); /* release jcenter */
}
/* 00C-013:IERn -- Interrupt Enable Registers */
for (i=Bt8370_IER7; i<=Bt8370_IER0; i++)
write_framer(sc, i, 0); /* no interrupts; polled */
/* 014:LOOP -- loopbacks */
if (sc->config.loop_back == CFG_LOOP_PAYLOAD)
write_framer(sc, Bt8370_LOOP, LOOP_PAYLOAD);
else if (sc->config.loop_back == CFG_LOOP_LINE)
write_framer(sc, Bt8370_LOOP, LOOP_LINE);
else if (sc->config.loop_back == CFG_LOOP_OTHER)
write_framer(sc, Bt8370_LOOP, LOOP_ANALOG);
else if (sc->config.loop_back == CFG_LOOP_INWARD)
write_framer(sc, Bt8370_LOOP, LOOP_FRAMER);
else if (sc->config.loop_back == CFG_LOOP_DUAL)
write_framer(sc, Bt8370_LOOP, LOOP_DUAL);
else
write_framer(sc, Bt8370_LOOP, 0x00); /* no loopback */
/* 015:DL3_TS -- Data Link 3 */
write_framer(sc, Bt8370_DL3_TS, 0x00); /* disabled */
/* 018:PIO -- Programmable I/O */
write_framer(sc, Bt8370_PIO, 0xFF); /* all pins are outputs */
/* 019:POE -- Programmable Output Enable */
write_framer(sc, Bt8370_POE, 0x00); /* all outputs are enabled */
/* 01A;CMUX -- Clock Input Mux */
if (sc->config.tx_clk_src == CFG_CLKMUX_EXT)
write_framer(sc, Bt8370_CMUX, 0x0C); /* external timing */
else
write_framer(sc, Bt8370_CMUX, 0x0F); /* internal timing */
/* 020:LIU_CR -- Line Interface Unit Config Register */
write_framer(sc, Bt8370_LIU_CR, 0xC1); /* reset LIU, squelch */
/* 022:RLIU_CR -- RX Line Interface Unit Config Reg */
/* Errata sheet says don't use freeze-short, but we do anyway! */
write_framer(sc, Bt8370_RLIU_CR, 0xB1); /* AGC=2048, Long Eye */
/* Select Rx sensitivity based on cable length. */
if ((gain = sc->config.rx_gain) == CFG_GAIN_AUTO)
{
if (sc->config.cable_len > 2000)
gain = CFG_GAIN_EXTEND;
else if (sc->config.cable_len > 1000)
gain = CFG_GAIN_LONG;
else if (sc->config.cable_len > 100)
gain = CFG_GAIN_MEDIUM;
else
gain = CFG_GAIN_SHORT;
}
/* 024:VGA_MAX -- Variable Gain Amplifier Max gain */
write_framer(sc, Bt8370_VGA_MAX, gain);
/* 028:PRE_EQ -- Pre Equalizer */
if (gain == CFG_GAIN_EXTEND)
write_framer(sc, Bt8370_PRE_EQ, 0xE6); /* ON; thresh 6 */
else
write_framer(sc, Bt8370_PRE_EQ, 0xA6); /* OFF; thresh 6 */
/* 038-03C:GAINn -- RX Equalizer gain thresholds */
write_framer(sc, Bt8370_GAIN0, 0x24);
write_framer(sc, Bt8370_GAIN1, 0x28);
write_framer(sc, Bt8370_GAIN2, 0x2C);
write_framer(sc, Bt8370_GAIN3, 0x30);
write_framer(sc, Bt8370_GAIN4, 0x34);
/* 040:RCR0 -- Receiver Control Register 0 */
if (FORMAT_T1ESF)
write_framer(sc, Bt8370_RCR0, 0x05); /* B8ZS, 2/5 FErrs */
else if (FORMAT_T1SF)
write_framer(sc, Bt8370_RCR0, 0x84); /* AMI, 2/5 FErrs */
else if (FORMAT_E1NONE)
write_framer(sc, Bt8370_RCR0, 0x41); /* HDB3, rabort */
else if (FORMAT_E1CRC)
write_framer(sc, Bt8370_RCR0, 0x09); /* HDB3, 3 FErrs or 915 CErrs */
else /* E1 no CRC */
write_framer(sc, Bt8370_RCR0, 0x19); /* HDB3, 3 FErrs */
/* 041:RPATT -- Receive Test Pattern configuration */
write_framer(sc, Bt8370_RPATT, 0x3E); /* looking for framed QRSS */
/* 042:RLB -- Receive Loop Back code detector config */
write_framer(sc, Bt8370_RLB, 0x09); /* 6 bits down; 5 bits up */
/* 043:LBA -- Loop Back Activate code */
write_framer(sc, Bt8370_LBA, 0x08); /* 10000 10000 10000 ... */
/* 044:LBD -- Loop Back Deactivate code */
write_framer(sc, Bt8370_LBD, 0x24); /* 100100 100100 100100 ... */
/* 045:RALM -- Receive Alarm signal configuration */
write_framer(sc, Bt8370_RALM, 0x0C); /* yel_intg rlof_intg */
/* 046:LATCH -- Alarm/Error/Counter Latch register */
write_framer(sc, Bt8370_LATCH, 0x1F); /* stop_cnt latch_{cnt,err,alm} */
/* Select Pulse Shape based on cable length (T1 only). */
if ((pulse = sc->config.tx_pulse) == CFG_PULSE_AUTO)
{
if (FORMAT_T1ANY)
{
if (sc->config.cable_len > 200)
pulse = CFG_PULSE_T1CSU;
else if (sc->config.cable_len > 160)
pulse = CFG_PULSE_T1DSX4;
else if (sc->config.cable_len > 120)
pulse = CFG_PULSE_T1DSX3;
else if (sc->config.cable_len > 80)
pulse = CFG_PULSE_T1DSX2;
else if (sc->config.cable_len > 40)
pulse = CFG_PULSE_T1DSX1;
else
pulse = CFG_PULSE_T1DSX0;
}
else
pulse = CFG_PULSE_E1TWIST;
}
/* Select Line Build Out based on cable length (T1CSU only). */
if ((lbo = sc->config.tx_lbo) == CFG_LBO_AUTO)
{
if (pulse == CFG_PULSE_T1CSU)
{
if (sc->config.cable_len > 1500)
lbo = CFG_LBO_0DB;
else if (sc->config.cable_len > 1000)
lbo = CFG_LBO_7DB;
else if (sc->config.cable_len > 500)
lbo = CFG_LBO_15DB;
else
lbo = CFG_LBO_22DB;
}
else
lbo = 0;
}
/* 068:TLIU_CR -- Transmit LIU Control Register */
write_framer(sc, Bt8370_TLIU_CR, (0x40 | (lbo & 0x30) | (pulse & 0x0E)));
/* 070:TCR0 -- Transmit Framer Configuration */
write_framer(sc, Bt8370_TCR0, sc->config.format>>1);
/* 071:TCR1 -- Transmitter Configuration */
if (FORMAT_T1SF)
write_framer(sc, Bt8370_TCR1, 0x43); /* tabort, AMI PDV enforced */
else
write_framer(sc, Bt8370_TCR1, 0x41); /* tabort, B8ZS or HDB3 */
/* 072:TFRM -- Transmit Frame format MYEL YEL MF FE CRC FBIT */
if (sc->config.format == CFG_FORMAT_T1ESF)
write_framer(sc, Bt8370_TFRM, 0x0B); /* - YEL MF - CRC FBIT */
else if (sc->config.format == CFG_FORMAT_T1SF)
write_framer(sc, Bt8370_TFRM, 0x19); /* - YEL MF - - FBIT */
else if (sc->config.format == CFG_FORMAT_E1FAS)
write_framer(sc, Bt8370_TFRM, 0x11); /* - YEL - - - FBIT */
else if (sc->config.format == CFG_FORMAT_E1FASCRC)
write_framer(sc, Bt8370_TFRM, 0x1F); /* - YEL MF FE CRC FBIT */
else if (sc->config.format == CFG_FORMAT_E1FASCAS)
write_framer(sc, Bt8370_TFRM, 0x31); /* MYEL YEL - - - FBIT */
else if (sc->config.format == CFG_FORMAT_E1FASCRCCAS)
write_framer(sc, Bt8370_TFRM, 0x3F); /* MYEL YEL MF FE CRC FBIT */
else if (sc->config.format == CFG_FORMAT_E1NONE)
write_framer(sc, Bt8370_TFRM, 0x00); /* NO FRAMING BITS AT ALL! */
/* 073:TERROR -- Transmit Error Insert */
write_framer(sc, Bt8370_TERROR, 0x00); /* no errors, please! */
/* 074:TMAN -- Transmit Manual Sa-byte/FEBE configuration */
write_framer(sc, Bt8370_TMAN, 0x00); /* none */
/* 075:TALM -- Transmit Alarm Signal Configuration */
if (FORMAT_E1ANY)
write_framer(sc, Bt8370_TALM, 0x38); /* auto_myel auto_yel auto_ais */
else if (FORMAT_T1ANY)
write_framer(sc, Bt8370_TALM, 0x18); /* auto_yel auto_ais */
/* 076:TPATT -- Transmit Test Pattern Configuration */
write_framer(sc, Bt8370_TPATT, 0x00); /* disabled */
/* 077:TLB -- Transmit Inband Loopback Code Configuration */
write_framer(sc, Bt8370_TLB, 0x00); /* disabled */
/* 090:CLAD_CR -- Clack Rate Adapter Configuration */
if (FORMAT_T1ANY)
write_framer(sc, Bt8370_CLAD_CR, 0x06); /* loop filter gain 1/2^6 */
else
write_framer(sc, Bt8370_CLAD_CR, 0x08); /* loop filter gain 1/2^8 */
/* 091:CSEL -- CLAD frequency Select */
if (FORMAT_T1ANY)
write_framer(sc, Bt8370_CSEL, 0x55); /* 1544 kHz */
else
write_framer(sc, Bt8370_CSEL, 0x11); /* 2048 kHz */
/* 092:CPHASE -- CLAD Phase detector */
if (FORMAT_T1ANY)
write_framer(sc, Bt8370_CPHASE, 0x22); /* phase compare @ 386 kHz */
else
write_framer(sc, Bt8370_CPHASE, 0x00); /* phase compare @ 2048 kHz */
if (FORMAT_T1ESF) /* BOP & PRM are enabled in T1ESF mode only. */
{
/* 0A0:BOP -- Bit Oriented Protocol messages */
write_framer(sc, Bt8370_BOP, RBOP_25 | TBOP_OFF);
/* 0A4:DL1_TS -- Data Link 1 Time Slot Enable */
write_framer(sc, Bt8370_DL1_TS, 0x40); /* FDL bits in odd frames */
/* 0A6:DL1_CTL -- Data Link 1 Control */
write_framer(sc, Bt8370_DL1_CTL, 0x03); /* FCS mode, TX on, RX on */
/* 0A7:RDL1_FFC -- Rx Data Link 1 Fifo Fill Control */
write_framer(sc, Bt8370_RDL1_FFC, 0x30); /* assert "near full" at 48 */
/* 0AA:PRM -- Performance Report Messages */
write_framer(sc, Bt8370_PRM, 0x80);
}
/* 0D0:SBI_CR -- System Bus Interface Configuration Register */
if (FORMAT_T1ANY)
write_framer(sc, Bt8370_SBI_CR, 0x47); /* 1.544 with 24 TS +Fbits */
else
write_framer(sc, Bt8370_SBI_CR, 0x46); /* 2.048 with 32 TS */
/* 0D1:RSB_CR -- Receive System Bus Configuration Register */
/* Change RINDO & RFSYNC on falling edge of RSBCLKI. */
write_framer(sc, Bt8370_RSB_CR, 0x70);
/* 0D2,0D3:RSYNC_{TS,BIT} -- Receive frame Sync offset */
write_framer(sc, Bt8370_RSYNC_BIT, 0x00);
write_framer(sc, Bt8370_RSYNC_TS, 0x00);
/* 0D4:TSB_CR -- Transmit System Bus Configuration Register */
/* Change TINDO & TFSYNC on falling edge of TSBCLKI. */
write_framer(sc, Bt8370_TSB_CR, 0x30);
/* 0D5,0D6:TSYNC_{TS,BIT} -- Transmit frame Sync offset */
write_framer(sc, Bt8370_TSYNC_BIT, 0x00);
write_framer(sc, Bt8370_TSYNC_TS, 0x00);
/* 0D7:RSIG_CR -- Receive SIGnalling Configuratin Register */
write_framer(sc, Bt8370_RSIG_CR, 0x00);
/* Assign and configure 64Kb TIME SLOTS. */
/* TS24..TS1 must be assigned for T1, TS31..TS0 for E1. */
/* Timeslots with no user data have RINDO and TINDO off. */
for (i=0; i<32; i++)
{
/* 0E0-0FF:SBCn -- System Bus Per-Channel Control */
if (FORMAT_T1ANY && (i==0 || i>24))
write_framer(sc, Bt8370_SBCn +i, 0x00); /* not assigned in T1 mode */
else if (FORMAT_E1ANY && (i==0) && !FORMAT_E1NONE)
write_framer(sc, Bt8370_SBCn +i, 0x01); /* assigned, TS0 o/h bits */
else if (FORMAT_E1CAS && (i==16) && !FORMAT_E1NONE)
write_framer(sc, Bt8370_SBCn +i, 0x01); /* assigned, TS16 o/h bits */
else if ((sc->config.time_slots & (1<<i)) != 0)
write_framer(sc, Bt8370_SBCn +i, 0x0D); /* assigned, RINDO, TINDO */
else
write_framer(sc, Bt8370_SBCn +i, 0x01); /* assigned, idle */
/* 100-11F:TPCn -- Transmit Per-Channel Control */
if (FORMAT_E1CAS && (i==0))
write_framer(sc, Bt8370_TPCn +i, 0x30); /* tidle, sig=0000 (MAS) */
else if (FORMAT_E1CAS && (i==16))
write_framer(sc, Bt8370_TPCn +i, 0x3B); /* tidle, sig=1011 (XYXX) */
else if ((sc->config.time_slots & (1<<i)) == 0)
write_framer(sc, Bt8370_TPCn +i, 0x20); /* tidle: use TSLIP_LOn */
else
write_framer(sc, Bt8370_TPCn +i, 0x00); /* nothing special */
/* 140-15F:TSLIP_LOn -- Transmit PCM Slip Buffer */
write_framer(sc, Bt8370_TSLIP_LOn +i, 0x7F); /* idle chan data */
/* 180-19F:RPCn -- Receive Per-Channel Control */
write_framer(sc, Bt8370_RPCn +i, 0x00); /* nothing special */
}
/* Enable transmitter output drivers. */
set_mii16_bits(sc, MII16_T1_XOE);
}
static void
t1_ident(softc_t *sc)
{
printf(", Bt837%x rev %x",
read_framer(sc, Bt8370_DID)>>4,
read_framer(sc, Bt8370_DID)&0x0F);
}
/* Called once a second; must not sleep. */
static int
t1_watchdog(softc_t *sc)
{
u_int16_t LCV = 0, FERR = 0, CRC = 0, FEBE = 0;
u_int8_t alm1, alm3, loop, isr0;
int link_status = STATUS_UP;
int i;
/* Read the alarm registers */
alm1 = read_framer(sc, Bt8370_ALM1);
alm3 = read_framer(sc, Bt8370_ALM3);
loop = read_framer(sc, Bt8370_LOOP);
isr0 = read_framer(sc, Bt8370_ISR0);
/* Always ignore the SIGFRZ alarm bit, */
alm1 &= ~ALM1_SIGFRZ;
if (FORMAT_T1ANY) /* ignore RYEL in T1 modes */
alm1 &= ~ALM1_RYEL;
else if (FORMAT_E1NONE) /* ignore all alarms except LOS */
alm1 &= ALM1_RLOS;
/* Software is alive. */
led_inv(sc, MII16_T1_LED_GRN);
/* Receiving Alarm Indication Signal (AIS). */
if ((alm1 & ALM1_RAIS)!=0) /* receiving ais */
led_on(sc, MII16_T1_LED_BLU);
else if ((alm1 & ALM1_RLOS)!=0) /* sending ais */
led_inv(sc, MII16_T1_LED_BLU);
else
led_off(sc, MII16_T1_LED_BLU);
/* Receiving Remote Alarm Indication (RAI). */
if ((alm1 & (ALM1_RMYEL | ALM1_RYEL))!=0) /* receiving rai */
led_on(sc, MII16_T1_LED_YEL);
else if ((alm1 & ALM1_RLOF)!=0) /* sending rai */
led_inv(sc, MII16_T1_LED_YEL);
else
led_off(sc, MII16_T1_LED_YEL);
/* If any alarm bits are set then the link is 'down'. */
/* The bad bits are: rmyel ryel rais ralos rlos rlof. */
/* Some alarm bits have been masked by this point. */
if (alm1 != 0) link_status = STATUS_DOWN;
/* Declare local Red Alarm if the link is down. */
if (link_status == STATUS_DOWN)
led_on(sc, MII16_T1_LED_RED);
else if (sc->loop_timer != 0) /* loopback is active */
led_inv(sc, MII16_T1_LED_RED);
else
led_off(sc, MII16_T1_LED_RED);
/* Print latched error bits if they changed. */
if ((DRIVER_DEBUG) && (alm1 != sc->last_alm1))
{
char *on = "ON ", *off = "OFF";
printf("%s: RLOF=%s RLOS=%s RALOS=%s RAIS=%s RYEL=%s RMYEL=%s\n",
NAME_UNIT,
(alm1 & ALM1_RLOF) ? on : off,
(alm1 & ALM1_RLOS) ? on : off,
(alm1 & ALM1_RALOS) ? on : off,
(alm1 & ALM1_RAIS) ? on : off,
(alm1 & ALM1_RYEL) ? on : off,
(alm1 & ALM1_RMYEL) ? on : off);
}
/* Check and print error counters if non-zero. */
LCV = read_framer(sc, Bt8370_LCV_LO) +
(read_framer(sc, Bt8370_LCV_HI)<<8);
if (!FORMAT_E1NONE)
FERR = read_framer(sc, Bt8370_FERR_LO) +
(read_framer(sc, Bt8370_FERR_HI)<<8);
if (FORMAT_E1CRC || FORMAT_T1ESF)
CRC = read_framer(sc, Bt8370_CRC_LO) +
(read_framer(sc, Bt8370_CRC_HI)<<8);
if (FORMAT_E1CRC)
FEBE = read_framer(sc, Bt8370_FEBE_LO) +
(read_framer(sc, Bt8370_FEBE_HI)<<8);
/* Only LCV is valid if Out-Of-Frame */
if (FORMAT_E1NONE) FERR = CRC = FEBE = 0;
if ((DRIVER_DEBUG) && (LCV || FERR || CRC || FEBE))
printf("%s: LCV=%u FERR=%u CRC=%u FEBE=%u\n",
NAME_UNIT, LCV, FERR, CRC, FEBE);
/* Driver keeps crude link-level error counters (SNMP is better). */
sc->status.cntrs.lcv_errs += LCV;
sc->status.cntrs.frm_errs += FERR;
sc->status.cntrs.crc_errs += CRC;
sc->status.cntrs.febe_errs += FEBE;
/* Check for BOP messages in the ESF Facility Data Link. */
if ((FORMAT_T1ESF) && (read_framer(sc, Bt8370_ISR1) & 0x80))
{
u_int8_t bop_code = read_framer(sc, Bt8370_RBOP) & 0x3F;
switch (bop_code)
{
case T1BOP_OOF:
{
if ((DRIVER_DEBUG) && ((sc->last_alm1 & ALM1_RMYEL)==0))
printf("%s: Receiving a 'yellow alarm' BOP msg\n", NAME_UNIT);
break;
}
case T1BOP_LINE_UP:
{
if (DRIVER_DEBUG)
printf("%s: Received a 'line loopback activate' BOP msg\n", NAME_UNIT);
write_framer(sc, Bt8370_LOOP, LOOP_LINE);
sc->loop_timer = 305;
break;
}
case T1BOP_LINE_DOWN:
{
if (DRIVER_DEBUG)
printf("%s: Received a 'line loopback deactivate' BOP msg\n", NAME_UNIT);
write_framer(sc, Bt8370_LOOP,
read_framer(sc, Bt8370_LOOP) & ~LOOP_LINE);
sc->loop_timer = 0;
break;
}
case T1BOP_PAY_UP:
{
if (DRIVER_DEBUG)
printf("%s: Received a 'payload loopback activate' BOP msg\n", NAME_UNIT);
write_framer(sc, Bt8370_LOOP, LOOP_PAYLOAD);
sc->loop_timer = 305;
break;
}
case T1BOP_PAY_DOWN:
{
if (DRIVER_DEBUG)
printf("%s: Received a 'payload loopback deactivate' BOP msg\n", NAME_UNIT);
write_framer(sc, Bt8370_LOOP,
read_framer(sc, Bt8370_LOOP) & ~LOOP_PAYLOAD);
sc->loop_timer = 0;
break;
}
default:
{
if (DRIVER_DEBUG)
printf("%s: Received a type 0x%02X BOP msg\n", NAME_UNIT, bop_code);
break;
}
}
}
/* Check for HDLC pkts in the ESF Facility Data Link. */
if ((FORMAT_T1ESF) && (read_framer(sc, Bt8370_ISR2) & 0x70))
{
/* while (not fifo-empty && not start-of-msg) flush fifo */
while ((read_framer(sc, Bt8370_RDL1_STAT) & 0x0C) == 0)
read_framer(sc, Bt8370_RDL1);
/* If (not fifo-empty), then begin processing fifo contents. */
if ((read_framer(sc, Bt8370_RDL1_STAT) & 0x0C) == 0x08)
{
u_int8_t msg[64];
u_int8_t stat = read_framer(sc, Bt8370_RDL1);
sc->status.cntrs.fdl_pkts++;
for (i=0; i<(stat & 0x3F); i++)
msg[i] = read_framer(sc, Bt8370_RDL1);
/* Is this FDL message a T1.403 performance report? */
if (((stat & 0x3F)==11) &&
((msg[0]==0x38) || (msg[0]==0x3A)) &&
(msg[1]==1) && (msg[2]==3))
/* Copy 4 PRs from FDL pkt to SNMP struct. */
memcpy(sc->status.snmp.t1.prm, msg+3, 8);
}
}
/* Check for inband loop up/down commands. */
if (FORMAT_T1ANY)
{
u_int8_t isr6 = read_framer(sc, Bt8370_ISR6);
u_int8_t alarm2 = read_framer(sc, Bt8370_ALM2);
u_int8_t tlb = read_framer(sc, Bt8370_TLB);
/* Inband Code == Loop Up && On Transition && Inband Tx Inactive */
if ((isr6 & 0x40) && (alarm2 & 0x40) && ((tlb & 1)==0))
{ /* CSU loop up is 10000 10000 ... */
if (DRIVER_DEBUG)
printf("%s: Received a 'CSU Loop Up' inband msg\n", NAME_UNIT);
write_framer(sc, Bt8370_LOOP, LOOP_LINE); /* Loop up */
sc->loop_timer = 305;
}
/* Inband Code == Loop Down && On Transition && Inband Tx Inactive */
if ((isr6 & 0x80) && (alarm2 & 0x80) && ((tlb & 1)==0))
{ /* CSU loop down is 100 100 100 ... */
if (DRIVER_DEBUG)
printf("%s: Received a 'CSU Loop Down' inband msg\n", NAME_UNIT);
write_framer(sc, Bt8370_LOOP,
read_framer(sc, Bt8370_LOOP) & ~LOOP_LINE); /* loop down */
sc->loop_timer = 0;
}
}
/* Manually send Yellow Alarm BOP msgs. */
if (FORMAT_T1ESF)
{
u_int8_t isr7 = read_framer(sc, Bt8370_ISR7);
if ((isr7 & 0x02) && (alm1 & 0x02)) /* RLOF on-transition */
{ /* Start sending continuous Yellow Alarm BOP messages. */
write_framer(sc, Bt8370_BOP, RBOP_25 | TBOP_CONT);
write_framer(sc, Bt8370_TBOP, 0x00); /* send BOP; order matters */
}
else if ((isr7 & 0x02) && ((alm1 & 0x02)==0)) /* RLOF off-transition */
{ /* Stop sending continuous Yellow Alarm BOP messages. */
write_framer(sc, Bt8370_BOP, RBOP_25 | TBOP_OFF);
}
}
/* Time out loopback requests. */
if (sc->loop_timer != 0)
if (--sc->loop_timer == 0)
if (loop != 0)
{
if (DRIVER_DEBUG)
printf("%s: Timeout: Loop Down after 300 seconds\n", NAME_UNIT);
write_framer(sc, Bt8370_LOOP, loop & ~(LOOP_PAYLOAD | LOOP_LINE));
}
/* RX Test Pattern status */
if ((DRIVER_DEBUG) && (isr0 & 0x10))
printf("%s: RX Test Pattern Sync\n", NAME_UNIT);
/* SNMP Error Counters */
sc->status.snmp.t1.lcv = LCV;
sc->status.snmp.t1.fe = FERR;
sc->status.snmp.t1.crc = CRC;
sc->status.snmp.t1.febe = FEBE;
/* SNMP Line Status */
sc->status.snmp.t1.line = 0;
if (alm1 & ALM1_RMYEL) sc->status.snmp.t1.line |= TLINE_RX_RAI;
if (alm1 & ALM1_RYEL) sc->status.snmp.t1.line |= TLINE_RX_RAI;
if (alm1 & ALM1_RLOF) sc->status.snmp.t1.line |= TLINE_TX_RAI;
if (alm1 & ALM1_RAIS) sc->status.snmp.t1.line |= TLINE_RX_AIS;
if (alm1 & ALM1_RLOS) sc->status.snmp.t1.line |= TLINE_TX_AIS;
if (alm1 & ALM1_RLOF) sc->status.snmp.t1.line |= TLINE_LOF;
if (alm1 & ALM1_RLOS) sc->status.snmp.t1.line |= TLINE_LOS;
if (alm3 & ALM3_RMAIS) sc->status.snmp.t1.line |= T1LINE_RX_TS16_AIS;
if (alm3 & ALM3_SRED) sc->status.snmp.t1.line |= T1LINE_TX_TS16_LOMF;
if (alm3 & ALM3_SEF) sc->status.snmp.t1.line |= T1LINE_SEF;
if (isr0 & 0x10) sc->status.snmp.t1.line |= T1LINE_RX_TEST;
if ((alm1 & ALM1_RMYEL) && (FORMAT_E1CAS))
sc->status.snmp.t1.line |= T1LINE_RX_TS16_LOMF;
/* SNMP Loopback Status */
sc->status.snmp.t1.loop &= ~(TLOOP_FAR_LINE | TLOOP_FAR_PAYLOAD);
if (sc->config.loop_back == CFG_LOOP_TULIP)
sc->status.snmp.t1.loop |= TLOOP_NEAR_OTHER;
if (loop & LOOP_PAYLOAD) sc->status.snmp.t1.loop |= TLOOP_NEAR_PAYLOAD;
if (loop & LOOP_LINE) sc->status.snmp.t1.loop |= TLOOP_NEAR_LINE;
if (loop & LOOP_ANALOG) sc->status.snmp.t1.loop |= TLOOP_NEAR_OTHER;
if (loop & LOOP_FRAMER) sc->status.snmp.t1.loop |= TLOOP_NEAR_INWARD;
/* Remember this state until next time. */
sc->last_alm1 = alm1;
/* If an INWARD loopback is in effect, link status is UP */
if (sc->config.loop_back != CFG_LOOP_NONE) /* XXX INWARD ONLY */
link_status = STATUS_UP;
return link_status;
}
/* IOCTL SYSCALL: can sleep. */
static void
t1_send_bop(softc_t *sc, int bop_code)
{
u_int8_t bop;
int i;
/* The BOP transmitter could be sending a continuous */
/* BOP msg when told to send this BOP_25 message. */
/* So save and restore the state of the BOP machine. */
bop = read_framer(sc, Bt8370_BOP);
write_framer(sc, Bt8370_BOP, RBOP_OFF | TBOP_OFF);
for (i=0; i<40; i++) /* max delay 400 ms. */
if (read_framer(sc, Bt8370_BOP_STAT) & 0x80) SLEEP(10000);
/* send 25 repetitions of bop_code */
write_framer(sc, Bt8370_BOP, RBOP_OFF | TBOP_25);
write_framer(sc, Bt8370_TBOP, bop_code); /* order matters */
/* wait for tx to stop */
for (i=0; i<40; i++) /* max delay 400 ms. */
if (read_framer(sc, Bt8370_BOP_STAT) & 0x80) SLEEP(10000);
/* Restore previous state of the BOP machine. */
write_framer(sc, Bt8370_BOP, bop);
}
/* IOCTL SYSCALL: can sleep. */
static int
t1_ioctl(softc_t *sc, struct ioctl *ioctl)
{
int error = 0;
switch (ioctl->cmd)
{
case IOCTL_SNMP_SEND: /* set opstatus? */
{
switch (ioctl->data)
{
case TSEND_NORMAL:
{
write_framer(sc, Bt8370_TPATT, 0x00); /* tx pattern generator off */
write_framer(sc, Bt8370_RPATT, 0x00); /* rx pattern detector off */
write_framer(sc, Bt8370_TLB, 0x00); /* tx inband generator off */
break;
}
case TSEND_LINE:
{
if (FORMAT_T1ESF)
t1_send_bop(sc, T1BOP_LINE_UP);
else if (FORMAT_T1SF)
{
write_framer(sc, Bt8370_LBP, 0x08); /* 10000 10000 ... */
write_framer(sc, Bt8370_TLB, 0x05); /* 5 bits, framed, start */
}
sc->status.snmp.t1.loop |= TLOOP_FAR_LINE;
break;
}
case TSEND_PAYLOAD:
{
t1_send_bop(sc, T1BOP_PAY_UP);
sc->status.snmp.t1.loop |= TLOOP_FAR_PAYLOAD;
break;
}
case TSEND_RESET:
{
if (sc->status.snmp.t1.loop == TLOOP_FAR_LINE)
{
if (FORMAT_T1ESF)
t1_send_bop(sc, T1BOP_LINE_DOWN);
else if (FORMAT_T1SF)
{
write_framer(sc, Bt8370_LBP, 0x24); /* 100100 100100 ... */
write_framer(sc, Bt8370_TLB, 0x09); /* 6 bits, framed, start */
}
sc->status.snmp.t1.loop &= ~TLOOP_FAR_LINE;
}
if (sc->status.snmp.t1.loop == TLOOP_FAR_PAYLOAD)
{
t1_send_bop(sc, T1BOP_PAY_DOWN);
sc->status.snmp.t1.loop &= ~TLOOP_FAR_PAYLOAD;
}
break;
}
case TSEND_QRS:
{
write_framer(sc, Bt8370_TPATT, 0x1E); /* framed QRSS */
break;
}
default:
{
error = EINVAL;
break;
}
}
break;
}
case IOCTL_SNMP_LOOP: /* set opstatus = test? */
{
u_int8_t new_loop = 0;
if (ioctl->data == CFG_LOOP_NONE)
new_loop = 0;
else if (ioctl->data == CFG_LOOP_PAYLOAD)
new_loop = LOOP_PAYLOAD;
else if (ioctl->data == CFG_LOOP_LINE)
new_loop = LOOP_LINE;
else if (ioctl->data == CFG_LOOP_OTHER)
new_loop = LOOP_ANALOG;
else if (ioctl->data == CFG_LOOP_INWARD)
new_loop = LOOP_FRAMER;
else if (ioctl->data == CFG_LOOP_DUAL)
new_loop = LOOP_DUAL;
else
error = EINVAL;
if (error == 0)
{
write_framer(sc, Bt8370_LOOP, new_loop);
sc->config.loop_back = ioctl->data;
}
break;
}
default:
error = EINVAL;
break;
}
return error;
}
static
struct card hssi_card =
{
.config = hssi_config,
.ident = hssi_ident,
.watchdog = hssi_watchdog,
.ioctl = hssi_ioctl,
};
static
struct card t3_card =
{
.config = t3_config,
.ident = t3_ident,
.watchdog = t3_watchdog,
.ioctl = t3_ioctl,
};
static
struct card ssi_card =
{
.config = ssi_config,
.ident = ssi_ident,
.watchdog = ssi_watchdog,
.ioctl = ssi_ioctl,
};
static
struct card t1_card =
{
.config = t1_config,
.ident = t1_ident,
.watchdog = t1_watchdog,
.ioctl = t1_ioctl,
};
/* RAWIP is raw IP packets (v4 or v6) in HDLC frames with NO HEADERS. */
/* No HDLC Address/Control fields! No line control protocol at all! */
/* This code is BSD/ifnet-specific; Linux and Netgraph also do RAWIP. */
#if IFNET
# if ((defined(__FreeBSD__) && (__FreeBSD_version < 500000)) ||\
defined(__NetBSD__) || defined(__OpenBSD__) || defined(__bsdi__))
static void
netisr_dispatch(int isr, struct mbuf *mbuf)
{
struct ifqueue *intrq = NULL;
int qfull = 0;
#if INET
if (isr == NETISR_IP) intrq = &ipintrq;
#endif
#if INET6
if (isr == NETISR_IPV6) intrq = &ip6intrq;
#endif
if ((intrq != NULL) && ((qfull = IF_QFULL(intrq)) == 0))
{
/* rxintr_cleanup() ENQUEUES in a hard interrupt. */
/* networking code DEQUEUES in a soft interrupt. */
/* Some BSD QUEUE routines are not interrupt-safe. */
DISABLE_INTR; /* noop in FreeBSD */
IF_ENQUEUE(intrq, mbuf);
ENABLE_INTR;
schednetisr(isr); /* schedule a soft interrupt */
}
else
{
m_freem(mbuf);
if ((intrq != NULL) && (qfull != 0))
IF_DROP(intrq);
}
}
# endif /* ((__FreeBSD__ && (__FreeBSD_version < 500000)) || */
/* __NetBSD__ || __OpenBSD__ || __bsdi__) */
/* rxintr_cleanup calls this to give a newly arrived pkt to higher levels. */
static void
lmc_raw_input(struct ifnet *ifp, struct mbuf *mbuf)
{
softc_t *sc = IFP2SC(ifp);
M_SETFIB(mbuf, ifp->if_fib);
# if INET
if (mbuf->m_data[0]>>4 == 4)
netisr_dispatch(NETISR_IP, mbuf);
else
# endif
# if INET6
if (mbuf->m_data[0]>>4 == 6)
netisr_dispatch(NETISR_IPV6, mbuf);
else
# endif
{
m_freem(mbuf);
sc->status.cntrs.idiscards++;
if (DRIVER_DEBUG)
printf("%s: lmc_raw_input: rx pkt discarded: not IPv4 or IPv6\n",
NAME_UNIT);
}
}
#endif /* IFNET */
/* There are TWO VERSIONS of interrupt/DMA code: Linux & BSD.
* Handling Linux and the BSDs with CPP directives would
* make the code unreadable, so there are two versions.
* Conceptually, the two versions do the same thing and
* core_interrupt() doesn't know they are different.
*
* We are "standing on the head of a pin" in these routines.
* Tulip CSRs can be accessed, but nothing else is interrupt-safe!
* Do NOT access: MII, GPIO, SROM, BIOSROM, XILINX, SYNTH, or DAC.
*/
#if BSD /* BSD version of interrupt/DMA code */
/* Singly-linked tail-queues hold mbufs with active DMA.
* For RX, single mbuf clusters; for TX, mbuf chains are queued.
* NB: mbufs are linked through their m_nextpkt field.
* Callers must hold sc->bottom_lock; not otherwise locked.
*/
/* Put an mbuf (chain) on the tail of the descriptor ring queue. */
static void /* BSD version */
mbuf_enqueue(struct desc_ring *ring, struct mbuf *m)
{
m->m_nextpkt = NULL;
if (ring->tail == NULL)
ring->head = m;
else
ring->tail->m_nextpkt = m;
ring->tail = m;
}
/* Get an mbuf (chain) from the head of the descriptor ring queue. */
static struct mbuf* /* BSD version */
mbuf_dequeue(struct desc_ring *ring)
{
struct mbuf *m = ring->head;
if (m != NULL)
if ((ring->head = m->m_nextpkt) == NULL)
ring->tail = NULL;
return m;
}
# ifdef __FreeBSD__
static void /* *** FreeBSD ONLY *** Callout from bus_dmamap_load() */
fbsd_dmamap_load(void *arg, bus_dma_segment_t *segs, int nsegs, int error)
{
struct desc_ring *ring = arg;
ring->nsegs = error ? 0 : nsegs;
ring->segs[0] = segs[0];
ring->segs[1] = segs[1];
}
# endif
/* Initialize a DMA descriptor ring. */
static int /* BSD version */
create_ring(softc_t *sc, struct desc_ring *ring, int num_descs)
{
struct dma_desc *descs;
int size_descs = sizeof(struct dma_desc)*num_descs;
int i, error = 0;
/* The DMA descriptor array must not cross a page boundary. */
if (size_descs > PAGE_SIZE)
{
printf("%s: DMA descriptor array > PAGE_SIZE (%d)\n", NAME_UNIT,
(u_int)PAGE_SIZE);
return EINVAL;
}
#ifdef __FreeBSD__
/* Create a DMA tag for descriptors and buffers. */
if ((error = bus_dma_tag_create(NULL, 4, 0, BUS_SPACE_MAXADDR_32BIT,
BUS_SPACE_MAXADDR, NULL, NULL, PAGE_SIZE, 2, PAGE_SIZE, BUS_DMA_ALLOCNOW,
# if (__FreeBSD_version >= 502000)
NULL, NULL,
# endif
&ring->tag)))
{
printf("%s: bus_dma_tag_create() failed: error %d\n", NAME_UNIT, error);
return error;
}
/* Allocate wired physical memory for DMA descriptor array */
/* and map physical address to kernel virtual address. */
if ((error = bus_dmamem_alloc(ring->tag, (void**)&ring->first,
BUS_DMA_NOWAIT | BUS_DMA_COHERENT | BUS_DMA_ZERO, &ring->map)))
{
printf("%s: bus_dmamem_alloc() failed; error %d\n", NAME_UNIT, error);
return error;
}
descs = ring->first;
/* Map kernel virtual address to PCI address for DMA descriptor array. */
if ((error = bus_dmamap_load(ring->tag, ring->map, descs, size_descs,
fbsd_dmamap_load, ring, 0)))
{
printf("%s: bus_dmamap_load() failed; error %d\n", NAME_UNIT, error);
return error;
}
ring->dma_addr = ring->segs[0].ds_addr;
/* Allocate dmamaps for each DMA descriptor. */
for (i=0; i<num_descs; i++)
if ((error = bus_dmamap_create(ring->tag, 0, &descs[i].map)))
{
printf("%s: bus_dmamap_create() failed; error %d\n", NAME_UNIT, error);
return error;
}
#elif (defined(__NetBSD__) || defined(__OpenBSD__))
/* Use the DMA tag passed to attach() for descriptors and buffers. */
ring->tag = sc->pa_dmat;
/* Allocate wired physical memory for DMA descriptor array. */
if ((error = bus_dmamem_alloc(ring->tag, size_descs, PAGE_SIZE, 0,
ring->segs, 1, &ring->nsegs, BUS_DMA_NOWAIT)))
{
printf("%s: bus_dmamem_alloc() failed; error %d\n", NAME_UNIT, error);
return error;
}
/* Map physical address to kernel virtual address. */
if ((error = bus_dmamem_map(ring->tag, ring->segs, ring->nsegs,
size_descs, (caddr_t *)&ring->first, BUS_DMA_NOWAIT | BUS_DMA_COHERENT)))
{
printf("%s: bus_dmamem_map() failed; error %d\n", NAME_UNIT, error);
return error;
}
descs = ring->first; /* suppress compiler warning about aliasing */
memset(descs, 0, size_descs);
/* Allocate dmamap for PCI access to DMA descriptor array. */
if ((error = bus_dmamap_create(ring->tag, size_descs, 1,
size_descs, 0, BUS_DMA_NOWAIT | BUS_DMA_ALLOCNOW, &ring->map)))
{
printf("%s: bus_dmamap_create() failed; error %d\n", NAME_UNIT, error);
return error;
}
/* Map kernel virtual address to PCI address for DMA descriptor array. */
if ((error = bus_dmamap_load(ring->tag, ring->map, descs, size_descs,
0, BUS_DMA_NOWAIT)))
{
printf("%s: bus_dmamap_load() failed; error %d\n", NAME_UNIT, error);
return error;
}
ring->dma_addr = ring->map->dm_segs[0].ds_addr;
/* Allocate dmamaps for each DMA descriptor. */
for (i=0; i<num_descs; i++)
if ((error = bus_dmamap_create(ring->tag, MAX_DESC_LEN, 2,
MAX_CHUNK_LEN, 0, BUS_DMA_NOWAIT | BUS_DMA_ALLOCNOW, &descs[i].map)))
{
printf("%s: bus_dmamap_create() failed; error %d\n", NAME_UNIT, error);
return error;
}
#elif defined(__bsdi__)
/* Allocate wired physical memory for DMA descriptor array. */
if ((ring->first = malloc(size_descs, M_DEVBUF, M_NOWAIT)) == NULL)
{
printf("%s: malloc() failed for DMA descriptor array\n", NAME_UNIT);
return ENOMEM;
}
descs = ring->first;
memset(descs, 0, size_descs);
/* Map kernel virtual address to PCI address for DMA descriptor array. */
ring->dma_addr = vtophys(descs); /* Relax! BSD/OS only. */
#endif
ring->read = descs;
ring->write = descs;
ring->first = descs;
ring->last = descs + num_descs -1;
ring->last->control = TLP_DCTL_END_RING;
ring->num_descs = num_descs;
ring->size_descs = size_descs;
ring->head = NULL;
ring->tail = NULL;
return 0;
}
/* Destroy a DMA descriptor ring */
static void /* BSD version */
destroy_ring(softc_t *sc, struct desc_ring *ring)
{
struct dma_desc *desc;
struct mbuf *m;
/* Free queued mbufs. */
while ((m = mbuf_dequeue(ring)) != NULL)
m_freem(m);
/* TX may have one pkt that is not on any queue. */
if (sc->tx_mbuf != NULL)
{
m_freem(sc->tx_mbuf);
sc->tx_mbuf = NULL;
}
/* Unmap active DMA descriptors. */
while (ring->read != ring->write)
{
bus_dmamap_unload(ring->tag, ring->read->map);
if (ring->read++ == ring->last) ring->read = ring->first;
}
#ifdef __FreeBSD__
/* Free the dmamaps of all DMA descriptors. */
for (desc=ring->first; desc!=ring->last+1; desc++)
if (desc->map != NULL)
bus_dmamap_destroy(ring->tag, desc->map);
/* Unmap PCI address for DMA descriptor array. */
if (ring->dma_addr != 0)
bus_dmamap_unload(ring->tag, ring->map);
/* Free kernel memory for DMA descriptor array. */
if (ring->first != NULL)
bus_dmamem_free(ring->tag, ring->first, ring->map);
/* Free the DMA tag created for this ring. */
if (ring->tag != NULL)
bus_dma_tag_destroy(ring->tag);
#elif (defined(__NetBSD__) || defined(__OpenBSD__))
/* Free the dmamaps of all DMA descriptors. */
for (desc=ring->first; desc!=ring->last+1; desc++)
if (desc->map != NULL)
bus_dmamap_destroy(ring->tag, desc->map);
/* Unmap PCI address for DMA descriptor array. */
if (ring->dma_addr != 0)
bus_dmamap_unload(ring->tag, ring->map);
/* Free dmamap for DMA descriptor array. */
if (ring->map != NULL)
bus_dmamap_destroy(ring->tag, ring->map);
/* Unmap kernel address for DMA descriptor array. */
if (ring->first != NULL)
bus_dmamem_unmap(ring->tag, (caddr_t)ring->first, ring->size_descs);
/* Free kernel memory for DMA descriptor array. */
if (ring->segs[0].ds_addr != 0)
bus_dmamem_free(ring->tag, ring->segs, ring->nsegs);
#elif defined(__bsdi__)
/* Free kernel memory for DMA descriptor array. */
if (ring->first != NULL)
free(ring->first, M_DEVBUF);
#endif
}
/* Clean up after a packet has been received. */
static int /* BSD version */
rxintr_cleanup(softc_t *sc)
{
struct desc_ring *ring = &sc->rxring;
struct dma_desc *first_desc, *last_desc;
struct mbuf *first_mbuf=NULL, *last_mbuf=NULL;
struct mbuf *new_mbuf;
int pkt_len, desc_len;
#if (defined(__FreeBSD__) && defined(DEVICE_POLLING))
/* Input packet flow control (livelock prevention): */
/* Give pkts to higher levels only if quota is > 0. */
if (sc->quota <= 0) return 0;
#endif
/* This looks complicated, but remember: typically packets up */
/* to 2048 bytes long fit in one mbuf and use one descriptor. */
first_desc = last_desc = ring->read;
/* ASSERTION: If there is a descriptor in the ring and the hardware has */
/* finished with it, then that descriptor will have RX_FIRST_DESC set. */
if ((ring->read != ring->write) && /* descriptor ring not empty */
((ring->read->status & TLP_DSTS_OWNER) == 0) && /* hardware done */
((ring->read->status & TLP_DSTS_RX_FIRST_DESC) == 0)) /* should be set */
panic("%s: rxintr_cleanup: rx-first-descriptor not set.\n", NAME_UNIT);
/* First decide if a complete packet has arrived. */
/* Run down DMA descriptors looking for one marked "last". */
/* Bail out if an active descriptor is encountered. */
/* Accumulate most significant bits of packet length. */
pkt_len = 0;
for (;;)
{
if (last_desc == ring->write) return 0; /* no more descs */
if (last_desc->status & TLP_DSTS_OWNER) return 0; /* still active */
if (last_desc->status & TLP_DSTS_RX_LAST_DESC) break; /* end of packet */
pkt_len += last_desc->length1 + last_desc->length2; /* entire desc filled */
if (last_desc++->control & TLP_DCTL_END_RING) last_desc = ring->first; /* ring wrap */
}
/* A complete packet has arrived; how long is it? */
/* H/w ref man shows RX pkt length as a 14-bit field. */
/* An experiment found that only the 12 LSBs work. */
if (((last_desc->status>>16)&0xFFF) == 0) pkt_len += 4096; /* carry-bit */
pkt_len = (pkt_len & 0xF000) + ((last_desc->status>>16) & 0x0FFF);
/* Subtract the CRC length unless doing so would underflow. */
if (pkt_len >= sc->config.crc_len) pkt_len -= sc->config.crc_len;
/* Run down DMA descriptors again doing the following:
* 1) put pkt info in pkthdr of first mbuf,
* 2) link mbufs,
* 3) set mbuf lengths.
*/
first_desc = ring->read;
do
{
/* Read a DMA descriptor from the ring. */
last_desc = ring->read;
/* Advance the ring read pointer. */
if (ring->read++ == ring->last) ring->read = ring->first;
/* Dequeue the corresponding cluster mbuf. */
new_mbuf = mbuf_dequeue(ring);
if (new_mbuf == NULL)
panic("%s: rxintr_cleanup: expected an mbuf\n", NAME_UNIT);
desc_len = last_desc->length1 + last_desc->length2;
/* If bouncing, copy bounce buf to mbuf. */
DMA_SYNC(last_desc->map, desc_len, BUS_DMASYNC_POSTREAD);
/* Unmap kernel virtual address to PCI address. */
bus_dmamap_unload(ring->tag, last_desc->map);
/* 1) Put pkt info in pkthdr of first mbuf. */
if (last_desc == first_desc)
{
first_mbuf = new_mbuf;
first_mbuf->m_pkthdr.len = pkt_len; /* total pkt length */
#if IFNET
first_mbuf->m_pkthdr.rcvif = sc->ifp; /* how it got here */
#else
first_mbuf->m_pkthdr.rcvif = NULL;
#endif
}
else /* 2) link mbufs. */
{
last_mbuf->m_next = new_mbuf;
/* M_PKTHDR should be set in the first mbuf only. */
new_mbuf->m_flags &= ~M_PKTHDR;
}
last_mbuf = new_mbuf;
/* 3) Set mbuf lengths. */
new_mbuf->m_len = (pkt_len >= desc_len) ? desc_len : pkt_len;
pkt_len -= new_mbuf->m_len;
} while ((last_desc->status & TLP_DSTS_RX_LAST_DESC) == 0);
/* Decide whether to accept or to discard this packet. */
/* RxHDLC sets MIIERR for bad CRC, abort and partial byte at pkt end. */
if (((last_desc->status & TLP_DSTS_RX_BAD) == 0) &&
(sc->status.oper_status == STATUS_UP) &&
(first_mbuf->m_pkthdr.len > 0))
{
/* Optimization: copy a small pkt into a small mbuf. */
if (first_mbuf->m_pkthdr.len <= COPY_BREAK)
{
MGETHDR(new_mbuf, M_DONTWAIT, MT_DATA);
if (new_mbuf != NULL)
{
new_mbuf->m_pkthdr.rcvif = first_mbuf->m_pkthdr.rcvif;
new_mbuf->m_pkthdr.len = first_mbuf->m_pkthdr.len;
new_mbuf->m_len = first_mbuf->m_len;
memcpy(new_mbuf->m_data, first_mbuf->m_data,
first_mbuf->m_pkthdr.len);
m_freem(first_mbuf);
first_mbuf = new_mbuf;
}
}
/* Include CRC and one flag byte in input byte count. */
sc->status.cntrs.ibytes += first_mbuf->m_pkthdr.len + sc->config.crc_len +1;
sc->status.cntrs.ipackets++;
#if IFNET
sc->ifp->if_ipackets++;
LMC_BPF_MTAP(first_mbuf);
#endif
#if (defined(__FreeBSD__) && defined(DEVICE_POLLING))
sc->quota--;
#endif
/* Give this good packet to the network stacks. */
#if NETGRAPH
if (sc->ng_hook != NULL) /* is hook connected? */
{
# if (__FreeBSD_version >= 500000)
int error; /* ignore error */
NG_SEND_DATA_ONLY(error, sc->ng_hook, first_mbuf);
# else /* FreeBSD-4 */
ng_queue_data(sc->ng_hook, first_mbuf, NULL);
# endif
return 1; /* did something */
}
#endif /* NETGRAPH */
if (sc->config.line_pkg == PKG_RAWIP)
lmc_raw_input(sc->ifp, first_mbuf);
else
{
#if NSPPP
sppp_input(sc->ifp, first_mbuf);
#elif P2P
new_mbuf = first_mbuf;
while (new_mbuf != NULL)
{
sc->p2p->p2p_hdrinput(sc->p2p, new_mbuf->m_data, new_mbuf->m_len);
new_mbuf = new_mbuf->m_next;
}
sc->p2p->p2p_input(sc->p2p, NULL);
m_freem(first_mbuf);
#else
m_freem(first_mbuf);
sc->status.cntrs.idiscards++;
#endif
}
}
else if (sc->status.oper_status != STATUS_UP)
{
/* If the link is down, this packet is probably noise. */
m_freem(first_mbuf);
sc->status.cntrs.idiscards++;
if (DRIVER_DEBUG)
printf("%s: rxintr_cleanup: rx pkt discarded: link down\n", NAME_UNIT);
}
else /* Log and discard this bad packet. */
{
if (DRIVER_DEBUG)
printf("%s: RX bad pkt; len=%d %s%s%s%s\n",
NAME_UNIT, first_mbuf->m_pkthdr.len,
(last_desc->status & TLP_DSTS_RX_MII_ERR) ? " miierr" : "",
(last_desc->status & TLP_DSTS_RX_DRIBBLE) ? " dribble" : "",
(last_desc->status & TLP_DSTS_RX_DESC_ERR) ? " descerr" : "",
(last_desc->status & TLP_DSTS_RX_OVERRUN) ? " overrun" : "");
if (last_desc->status & TLP_DSTS_RX_OVERRUN)
sc->status.cntrs.fifo_over++;
else
sc->status.cntrs.ierrors++;
m_freem(first_mbuf);
}
return 1; /* did something */
}
/* Setup (prepare) to receive a packet. */
/* Try to keep the RX descriptor ring full of empty buffers. */
static int /* BSD version */
rxintr_setup(softc_t *sc)
{
struct desc_ring *ring = &sc->rxring;
struct dma_desc *desc;
struct mbuf *m;
int desc_len;
int error;
/* Ring is full if (wrap(write+1)==read) */
if (((ring->write == ring->last) ? ring->first : ring->write+1) == ring->read)
return 0; /* ring is full; nothing to do */
/* Allocate a small mbuf and attach an mbuf cluster. */
MGETHDR(m, M_DONTWAIT, MT_DATA);
if (m == NULL)
{
sc->status.cntrs.rxdma++;
if (DRIVER_DEBUG)
printf("%s: rxintr_setup: MGETHDR() failed\n", NAME_UNIT);
return 0;
}
MCLGET(m, M_DONTWAIT);
if ((m->m_flags & M_EXT) == 0)
{
m_freem(m);
sc->status.cntrs.rxdma++;
if (DRIVER_DEBUG)
printf("%s: rxintr_setup: MCLGET() failed\n", NAME_UNIT);
return 0;
}
/* Queue the mbuf for later processing by rxintr_cleanup. */
mbuf_enqueue(ring, m);
/* Write a DMA descriptor into the ring. */
/* Hardware won't see it until the OWNER bit is set. */
desc = ring->write;
/* Advance the ring write pointer. */
if (ring->write++ == ring->last) ring->write = ring->first;
desc_len = (MCLBYTES < MAX_DESC_LEN) ? MCLBYTES : MAX_DESC_LEN;
/* Map kernel virtual address to PCI address. */
if ((error = DMA_LOAD(desc->map, m->m_data, desc_len)))
printf("%s: bus_dmamap_load(rx) failed; error %d\n", NAME_UNIT, error);
/* Invalidate the cache for this mbuf. */
DMA_SYNC(desc->map, desc_len, BUS_DMASYNC_PREREAD);
/* Set up the DMA descriptor. */
#ifdef __FreeBSD__
desc->address1 = ring->segs[0].ds_addr;
#elif (defined(__NetBSD__) || defined(__OpenBSD__))
desc->address1 = desc->map->dm_segs[0].ds_addr;
#elif defined(__bsdi__)
desc->address1 = vtophys(m->m_data); /* Relax! BSD/OS only. */
#endif
desc->length1 = desc_len>>1;
desc->address2 = desc->address1 + desc->length1;
desc->length2 = desc_len>>1;
/* Before setting the OWNER bit, flush the cache (memory barrier). */
DMA_SYNC(ring->map, ring->size_descs, BUS_DMASYNC_PREWRITE);
/* Commit the DMA descriptor to the hardware. */
desc->status = TLP_DSTS_OWNER;
/* Notify the receiver that there is another buffer available. */
WRITE_CSR(TLP_RX_POLL, 1);
return 1; /* did something */
}
/* Clean up after a packet has been transmitted. */
/* Free the mbuf chain and update the DMA descriptor ring. */
static int /* BSD version */
txintr_cleanup(softc_t *sc)
{
struct desc_ring *ring = &sc->txring;
struct dma_desc *desc;
while ((ring->read != ring->write) && /* while ring is not empty */
((ring->read->status & TLP_DSTS_OWNER) == 0))
{
/* Read a DMA descriptor from the ring. */
desc = ring->read;
/* Advance the ring read pointer. */
if (ring->read++ == ring->last) ring->read = ring->first;
/* This is a no-op on most architectures. */
DMA_SYNC(desc->map, desc->length1 + desc->length2, BUS_DMASYNC_POSTWRITE);
/* Unmap kernel virtual address to PCI address. */
bus_dmamap_unload(ring->tag, desc->map);
/* If this descriptor is the last segment of a packet, */
/* then dequeue and free the corresponding mbuf chain. */
if ((desc->control & TLP_DCTL_TX_LAST_SEG) != 0)
{
struct mbuf *m;
if ((m = mbuf_dequeue(ring)) == NULL)
panic("%s: txintr_cleanup: expected an mbuf\n", NAME_UNIT);
/* Include CRC and one flag byte in output byte count. */
sc->status.cntrs.obytes += m->m_pkthdr.len + sc->config.crc_len +1;
sc->status.cntrs.opackets++;
#if IFNET
sc->ifp->if_opackets++;
LMC_BPF_MTAP(m);
#endif
/* The only bad TX status is fifo underrun. */
if ((desc->status & TLP_DSTS_TX_UNDERRUN) != 0)
sc->status.cntrs.fifo_under++;
m_freem(m);
return 1; /* did something */
}
}
return 0;
}
/* Build DMA descriptors for a transmit packet mbuf chain. */
static int /* 0=success; 1=error */ /* BSD version */
txintr_setup_mbuf(softc_t *sc, struct mbuf *m)
{
struct desc_ring *ring = &sc->txring;
struct dma_desc *desc;
unsigned int desc_len;
/* build DMA descriptors for a chain of mbufs. */
while (m != NULL)
{
char *data = m->m_data;
int length = m->m_len; /* zero length mbufs happen! */
/* Build DMA descriptors for one mbuf. */
while (length > 0)
{
int error;
/* Ring is full if (wrap(write+1)==read) */
if (((ring->temp==ring->last) ? ring->first : ring->temp+1) == ring->read)
{ /* Not enough DMA descriptors; try later. */
for (; ring->temp!=ring->write;
ring->temp = (ring->temp==ring->first)? ring->last : ring->temp-1)
bus_dmamap_unload(ring->tag, ring->temp->map);
sc->status.cntrs.txdma++;
return 1;
}
/* Provisionally, write a descriptor into the ring. */
/* But don't change the REAL ring write pointer. */
/* Hardware won't see it until the OWNER bit is set. */
desc = ring->temp;
/* Advance the temporary ring write pointer. */
if (ring->temp++ == ring->last) ring->temp = ring->first;
/* Clear all control bits except the END_RING bit. */
desc->control &= TLP_DCTL_END_RING;
/* Don't pad short packets up to 64 bytes. */
desc->control |= TLP_DCTL_TX_NO_PAD;
/* Use Tulip's CRC-32 generator, if appropriate. */
if (sc->config.crc_len != CFG_CRC_32)
desc->control |= TLP_DCTL_TX_NO_CRC;
/* Set the OWNER bit, except in the first descriptor. */
if (desc != ring->write)
desc->status = TLP_DSTS_OWNER;
desc_len = (length > MAX_CHUNK_LEN) ? MAX_CHUNK_LEN : length;
/* Map kernel virtual address to PCI address. */
if ((error = DMA_LOAD(desc->map, data, desc_len)))
printf("%s: bus_dmamap_load(tx) failed; error %d\n", NAME_UNIT, error);
/* Flush the cache and if bouncing, copy mbuf to bounce buf. */
DMA_SYNC(desc->map, desc_len, BUS_DMASYNC_PREWRITE);
/* Prevent wild fetches if mapping fails (nsegs==0). */
desc->length1 = desc->length2 = 0;
desc->address1 = desc->address2 = 0;
#if (defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__))
{
# ifdef __FreeBSD__
bus_dma_segment_t *segs = ring->segs;
int nsegs = ring->nsegs;
# elif (defined(__NetBSD__) || defined(__OpenBSD__))
bus_dma_segment_t *segs = desc->map->dm_segs;
int nsegs = desc->map->dm_nsegs;
# endif
if (nsegs >= 1)
{
desc->address1 = segs[0].ds_addr;
desc->length1 = segs[0].ds_len;
}
if (nsegs == 2)
{
desc->address2 = segs[1].ds_addr;
desc->length2 = segs[1].ds_len;
}
}
#elif defined(__bsdi__)
desc->address1 = vtophys(data); /* Relax! BSD/OS only. */
desc->length1 = desc_len;
#endif
data += desc_len;
length -= desc_len;
} /* while (length > 0) */
m = m->m_next;
} /* while (m != NULL) */
return 0; /* success */
}
/* Setup (prepare) to transmit a packet. */
/* Select a packet, build DMA descriptors and give packet to hardware. */
/* If DMA descriptors run out, abandon the attempt and return 0. */
static int /* BSD version */
txintr_setup(softc_t *sc)
{
struct desc_ring *ring = &sc->txring;
struct dma_desc *first_desc, *last_desc;
/* Protect against half-up links: Don't transmit */
/* if the receiver can't hear the far end. */
if (sc->status.oper_status != STATUS_UP) return 0;
/* Pick a packet to transmit. */
#if NETGRAPH
if ((sc->ng_hook != NULL) && (sc->tx_mbuf == NULL))
{
if (!IFQ_IS_EMPTY(&sc->ng_fastq))
IFQ_DEQUEUE(&sc->ng_fastq, sc->tx_mbuf);
else
IFQ_DEQUEUE(&sc->ng_sndq, sc->tx_mbuf);
}
else
#endif
if (sc->tx_mbuf == NULL)
{
if (sc->config.line_pkg == PKG_RAWIP)
IFQ_DEQUEUE(&sc->ifp->if_snd, sc->tx_mbuf);
else
{
#if NSPPP
sc->tx_mbuf = sppp_dequeue(sc->ifp);
#elif P2P
if (!IFQ_IS_EMPTY(&sc->p2p->p2p_isnd))
IFQ_DEQUEUE(&sc->p2p->p2p_isnd, sc->tx_mbuf);
else
IFQ_DEQUEUE(&sc->ifp->if_snd, sc->tx_mbuf);
#endif
}
}
if (sc->tx_mbuf == NULL) return 0; /* no pkt to transmit */
/* Build DMA descriptors for an outgoing mbuf chain. */
ring->temp = ring->write; /* temporary ring write pointer */
if (txintr_setup_mbuf(sc, sc->tx_mbuf) != 0) return 0;
/* Enqueue the mbuf; txintr_cleanup will free it. */
mbuf_enqueue(ring, sc->tx_mbuf);
/* The transmitter has room for another packet. */
sc->tx_mbuf = NULL;
/* Set first & last segment bits. */
/* last_desc is the desc BEFORE the one pointed to by ring->temp. */
first_desc = ring->write;
first_desc->control |= TLP_DCTL_TX_FIRST_SEG;
last_desc = (ring->temp==ring->first)? ring->last : ring->temp-1;
last_desc->control |= TLP_DCTL_TX_LAST_SEG;
/* Interrupt at end-of-transmission? Why bother the poor computer! */
/* last_desc->control |= TLP_DCTL_TX_INTERRUPT; */
/* Make sure the OWNER bit is not set in the next descriptor. */
/* The OWNER bit may have been set if a previous call aborted. */
ring->temp->status = 0;
/* Commit the DMA descriptors to the software. */
ring->write = ring->temp;
/* Before setting the OWNER bit, flush the cache (memory barrier). */
DMA_SYNC(ring->map, ring->size_descs, BUS_DMASYNC_PREWRITE);
/* Commit the DMA descriptors to the hardware. */
first_desc->status = TLP_DSTS_OWNER;
/* Notify the transmitter that there is another packet to send. */
WRITE_CSR(TLP_TX_POLL, 1);
return 1; /* did something */
}
#endif /* BSD */
#ifdef __linux__
/* NOTE: this is the LINUX version of the interrupt/DMA code, */
/* Singly-linked tail-queues hold sk_buffs with active DMA.
* skbuffs are linked through their sk_buff.next field.
* Callers must hold sc->bottom_lock; not otherwise locked.
*/
/* Put an skbuff on the tail of the descriptor ring queue. */
static void /* Linux version */
skbuff_enqueue(struct desc_ring *ring, struct sk_buff *skb)
{
skb->next = NULL;
if (ring->tail == NULL)
ring->head = skb;
else
ring->tail->next = skb;
ring->tail = skb;
}
/* Get an skbuff from the head of the descriptor ring queue. */
static struct sk_buff* /* Linux version */
skbuff_dequeue(struct desc_ring *ring)
{
struct sk_buff *skb = ring->head;
if (skb != NULL)
if ((ring->head = skb->next) == NULL)
ring->tail = NULL;
return skb;
}
/* Initialize a DMA descriptor ring. */
static int /* Linux version */
create_ring(softc_t *sc, struct desc_ring *ring, int num_descs)
{
struct dma_desc *descs;
int size_descs = sizeof(struct dma_desc)*num_descs;
/* Allocate and map memory for DMA descriptor array. */
if ((descs = pci_alloc_consistent(sc->pci_dev, size_descs,
&ring->dma_addr)) == NULL)
{
printk("%s: pci_alloc_consistent() failed\n", NAME_UNIT);
return ENOMEM;
}
memset(descs, 0, size_descs);
ring->read = descs;
ring->write = descs;
ring->first = descs;
ring->last = descs + num_descs -1;
ring->last->control = TLP_DCTL_END_RING;
ring->num_descs = num_descs;
ring->size_descs = size_descs;
ring->head = NULL;
ring->tail = NULL;
return 0;
}
/* Destroy a DMA descriptor ring */
static void /* Linux version */
destroy_ring(softc_t *sc, struct desc_ring *ring)
{
struct sk_buff *skb;
/* Free queued skbuffs. */
while ((skb = skbuff_dequeue(ring)) != NULL)
dev_kfree_skb(skb);
/* TX may have one pkt that is not on any queue. */
if (sc->tx_skb != NULL)
{
dev_kfree_skb(sc->tx_skb);
sc->tx_skb = NULL;
}
if (ring->first != NULL)
{
/* Unmap active DMA descriptors. */
while (ring->read != ring->write)
{
pci_unmap_single(sc->pci_dev, ring->read->address1,
ring->read->length1 + ring->read->length2, PCI_DMA_BIDIRECTIONAL);
if (ring->read++ == ring->last) ring->read = ring->first;
}
/* Unmap and free memory for DMA descriptor array. */
pci_free_consistent(sc->pci_dev, ring->size_descs, ring->first,
ring->dma_addr);
}
}
static int /* Linux version */
rxintr_cleanup(softc_t *sc)
{
struct desc_ring *ring = &sc->rxring;
struct dma_desc *first_desc, *last_desc;
struct sk_buff *first_skb=NULL, *last_skb=NULL;
struct sk_buff *new_skb;
int pkt_len, desc_len;
/* Input packet flow control (livelock prevention): */
/* Give pkts to higher levels only if quota is > 0. */
if (sc->quota <= 0) return 0;
/* This looks complicated, but remember: packets up to 4032 */
/* bytes long fit in one skbuff and use one DMA descriptor. */
first_desc = last_desc = ring->read;
/* ASSERTION: If there is a descriptor in the ring and the hardware has */
/* finished with it, then that descriptor will have RX_FIRST_DESC set. */
if ((ring->read != ring->write) && /* descriptor ring not empty */
((ring->read->status & TLP_DSTS_OWNER) == 0) && /* hardware done */
((ring->read->status & TLP_DSTS_RX_FIRST_DESC) == 0)) /* should be set */
panic("%s: rxintr_cleanup: rx-first-descriptor not set.\n", NAME_UNIT);
/* First decide if a complete packet has arrived. */
/* Run down DMA descriptors looking for one marked "last". */
/* Bail out if an active descriptor is encountered. */
/* Accumulate most significant bits of packet length. */
pkt_len = 0;
for (;;)
{
if (last_desc == ring->write) return 0; /* no more descs */
if (last_desc->status & TLP_DSTS_OWNER) return 0; /* still active */
if (last_desc->status & TLP_DSTS_RX_LAST_DESC) break; /* end of packet */
pkt_len += last_desc->length1 + last_desc->length2; /* entire desc filled */
if (last_desc++->control & TLP_DCTL_END_RING) last_desc = ring->first; /* ring wrap */
}
/* A complete packet has arrived; how long is it? */
/* H/w ref man shows RX pkt length as a 14-bit field. */
/* An experiment found that only the 12 LSBs work. */
if (((last_desc->status>>16)&0xFFF) == 0) pkt_len += 4096; /* carry-bit */
pkt_len = (pkt_len & 0xF000) + ((last_desc->status>>16) & 0x0FFF);
/* Subtract the CRC length unless doing so would underflow. */
if (pkt_len >= sc->config.crc_len) pkt_len -= sc->config.crc_len;
/* Run down DMA descriptors again doing the following:
* 1) put pkt info in hdr of first skbuff.
* 2) put additional skbuffs on frag_list.
* 3) set skbuff lengths.
*/
first_desc = ring->read;
do
{
/* Read a DMA descriptor from the ring. */
last_desc = ring->read;
/* Advance the ring read pointer. */
if (ring->read++ == ring->last) ring->read = ring->first;
/* Dequeue the corresponding skbuff. */
new_skb = skbuff_dequeue(ring);
if (new_skb == NULL)
panic("%s: rxintr_cleanup: expected an skbuff\n", NAME_UNIT);
desc_len = last_desc->length1 + last_desc->length2;
/* Unmap kernel virtual addresss to PCI address. */
pci_unmap_single(sc->pci_dev, last_desc->address1,
desc_len, PCI_DMA_FROMDEVICE);
/* Set skbuff length. */
skb_put(new_skb, (pkt_len >= desc_len) ? desc_len : pkt_len);
pkt_len -= new_skb->len;
/* 1) Put pkt info in hdr of first skbuff. */
if (last_desc == first_desc)
{
first_skb = new_skb;
if (sc->config.line_pkg == PKG_RAWIP)
{
if (first_skb->data[0]>>4 == 4)
first_skb->protocol = htons(ETH_P_IP);
else if (first_skb->data[0]>>4 == 6)
first_skb->protocol = htons(ETH_P_IPV6);
}
else
#if GEN_HDLC
first_skb->protocol = hdlc_type_trans(first_skb, sc->net_dev);
#else
first_skb->protocol = htons(ETH_P_HDLC);
#endif
first_skb->mac.raw = first_skb->data;
first_skb->dev = sc->net_dev;
do_gettimeofday(&first_skb->stamp);
sc->net_dev->last_rx = jiffies;
}
else /* 2) link skbuffs. */
{
/* Put this skbuff on the frag_list of the first skbuff. */
new_skb->next = NULL;
if (skb_shinfo(first_skb)->frag_list == NULL)
skb_shinfo(first_skb)->frag_list = new_skb;
else
last_skb->next = new_skb;
/* 3) set skbuff lengths. */
first_skb->len += new_skb->len;
first_skb->data_len += new_skb->len;
}
last_skb = new_skb;
} while ((last_desc->status & TLP_DSTS_RX_LAST_DESC) == 0);
/* Decide whether to accept or to discard this packet. */
/* RxHDLC sets MIIERR for bad CRC, abort and partial byte at pkt end. */
if (((last_desc->status & TLP_DSTS_RX_BAD) == 0) &&
(sc->status.oper_status == STATUS_UP) &&
(first_skb->len > 0))
{
/* Optimization: copy a small pkt into a small skbuff. */
if (first_skb->len <= COPY_BREAK)
if ((new_skb = skb_copy(first_skb, GFP_ATOMIC)) != NULL)
{
dev_kfree_skb_any(first_skb);
first_skb = new_skb;
}
/* Include CRC and one flag byte in input byte count. */
sc->status.cntrs.ibytes += first_skb->len + sc->config.crc_len +1;
sc->status.cntrs.ipackets++;
/* Give this good packet to the network stacks. */
netif_receive_skb(first_skb); /* NAPI */
sc->quota--;
}
else if (sc->status.oper_status != STATUS_UP)
{
/* If the link is down, this packet is probably noise. */
sc->status.cntrs.idiscards++;
dev_kfree_skb_any(first_skb);
if (DRIVER_DEBUG)
printk("%s: rxintr_cleanup: rx pkt discarded: link down\n", NAME_UNIT);
}
else /* Log and discard this bad packet. */
{
if (DRIVER_DEBUG)
printk("%s: RX bad pkt; len=%d %s%s%s%s\n",
NAME_UNIT, first_skb->len,
(last_desc->status & TLP_DSTS_RX_MII_ERR) ? " miierr" : "",
(last_desc->status & TLP_DSTS_RX_DRIBBLE) ? " dribble" : "",
(last_desc->status & TLP_DSTS_RX_DESC_ERR) ? " descerr" : "",
(last_desc->status & TLP_DSTS_RX_OVERRUN) ? " overrun" : "");
if (last_desc->status & TLP_DSTS_RX_OVERRUN)
sc->status.cntrs.fifo_over++;
else
sc->status.cntrs.ierrors++;
dev_kfree_skb_any(first_skb);
}
return 1; /* did something */
}
/* Setup (prepare) to receive a packet. */
/* Try to keep the RX descriptor ring full of empty buffers. */
static int /* Linux version */
rxintr_setup(softc_t *sc)
{
struct desc_ring *ring = &sc->rxring;
struct dma_desc *desc;
struct sk_buff *skb;
u_int32_t dma_addr;
/* Ring is full if (wrap(write+1)==read) */
if (((ring->write == ring->last) ? ring->first : ring->write+1) == ring->read)
return 0; /* ring is full; nothing to do */
/* Allocate an skbuff. */
if ((skb = dev_alloc_skb(MAX_DESC_LEN)) == NULL)
{
sc->status.cntrs.rxdma++;
if (DRIVER_DEBUG)
printk("%s: rxintr_setup: dev_alloc_skb() failed\n", NAME_UNIT);
return 0;
}
skb->dev = sc->net_dev;
/* Queue the skbuff for later processing by rxintr_cleanup. */
skbuff_enqueue(ring, skb);
/* Write a DMA descriptor into the ring. */
/* Hardware won't see it until the OWNER bit is set. */
desc = ring->write;
/* Advance the ring write pointer. */
if (ring->write++ == ring->last) ring->write = ring->first;
/* Map kernel virtual addresses to PCI addresses. */
dma_addr = pci_map_single(sc->pci_dev, skb->data,
MAX_DESC_LEN, PCI_DMA_FROMDEVICE);
/* Set up the DMA descriptor. */
desc->address1 = dma_addr;
desc->length1 = MAX_CHUNK_LEN;
desc->address2 = desc->address1 + desc->length1;
desc->length2 = MAX_CHUNK_LEN;
/* Before setting the OWNER bit, flush the cache (memory barrier). */
wmb(); /* write memory barrier */
/* Commit the DMA descriptor to the hardware. */
desc->status = TLP_DSTS_OWNER;
/* Notify the receiver that there is another buffer available. */
WRITE_CSR(TLP_RX_POLL, 1);
return 1; /* did something */
}
/* Clean up after a packet has been transmitted. */
/* Free the sk_buff and update the DMA descriptor ring. */
static int /* Linux version */
txintr_cleanup(softc_t *sc)
{
struct desc_ring *ring = &sc->txring;
struct dma_desc *desc;
while ((ring->read != ring->write) && /* ring is not empty */
((ring->read->status & TLP_DSTS_OWNER) == 0))
{
/* Read a DMA descriptor from the ring. */
desc = ring->read;
/* Advance the ring read pointer. */
if (ring->read++ == ring->last) ring->read = ring->first;
/* Unmap kernel virtual address to PCI address. */
pci_unmap_single(sc->pci_dev, desc->address1,
desc->length1 + desc->length2, PCI_DMA_TODEVICE);
/* If this descriptor is the last segment of a packet, */
/* then dequeue and free the corresponding skbuff. */
if ((desc->control & TLP_DCTL_TX_LAST_SEG) != 0)
{
struct sk_buff *skb;
if ((skb = skbuff_dequeue(ring)) == NULL)
panic("%s: txintr_cleanup: expected an sk_buff\n", NAME_UNIT);
/* Include CRC and one flag byte in output byte count. */
sc->status.cntrs.obytes += skb->len + sc->config.crc_len +1;
sc->status.cntrs.opackets++;
/* The only bad TX status is fifo underrun. */
if ((desc->status & TLP_DSTS_TX_UNDERRUN) != 0)
{
sc->status.cntrs.fifo_under++; /* also increment oerrors? */
if (DRIVER_DEBUG)
printk("%s: txintr_cleanup: tx fifo underrun\n", NAME_UNIT);
}
dev_kfree_skb_any(skb);
return 1; /* did something */
}
}
return 0;
}
/* Build DMA descriptors for a tranmit packet fragment, */
/* Assertion: fragment is contiguous in physical memory. */
static int /* 0=success; 1=error */ /* linux version */
txintr_setup_frag(softc_t *sc, char *data, int length)
{
struct desc_ring *ring = &sc->txring;
struct dma_desc *desc;
unsigned int desc_len;
u_int32_t dma_addr;
while (length > 0)
{
/* Ring is full if (wrap(write+1)==read) */
if (((ring->temp==ring->last) ? ring->first : ring->temp+1) == ring->read)
{ /* Not enough DMA descriptors; try later. */
for (; ring->temp!=ring->write;
ring->temp = (ring->temp==ring->first)? ring->last : ring->temp-1)
pci_unmap_single(sc->pci_dev, ring->temp->address1,
ring->temp->length1 + ring->temp->length2, PCI_DMA_FROMDEVICE);
sc->status.cntrs.txdma++;
return 1;
}
/* Provisionally, write a DMA descriptor into the ring. */
/* But don't change the REAL ring write pointer. */
/* Hardware won't see it until the OWNER bit is set. */
desc = ring->temp;
/* Advance the temporary ring write pointer. */
if (ring->temp++ == ring->last) ring->temp = ring->first;
/* Clear all control bits except the END_RING bit. */
desc->control &= TLP_DCTL_END_RING;
/* Don't pad short packets up to 64 bytes */
desc->control |= TLP_DCTL_TX_NO_PAD;
/* Use Tulip's CRC-32 generator, if appropriate. */
if (sc->config.crc_len != CFG_CRC_32)
desc->control |= TLP_DCTL_TX_NO_CRC;
/* Set the OWNER bit, except in the first descriptor. */
if (desc != ring->write)
desc->status = TLP_DSTS_OWNER;
desc_len = (length >= MAX_DESC_LEN) ? MAX_DESC_LEN : length;
/* Map kernel virtual address to PCI address. */
dma_addr = pci_map_single(sc->pci_dev, data, desc_len, PCI_DMA_TODEVICE);
/* If it will fit in one chunk, do so, otherwise split it. */
if (desc_len <= MAX_CHUNK_LEN)
{
desc->address1 = dma_addr;
desc->length1 = desc_len;
desc->address2 = 0;
desc->length2 = 0;
}
else
{
desc->address1 = dma_addr;
desc->length1 = desc_len>>1;
desc->address2 = desc->address1 + desc->length1;
desc->length2 = desc_len>>1;
if (desc_len & 1) desc->length2++;
}
data += desc_len;
length -= desc_len;
} /* while (length > 0) */
return 0; /* success */
}
/* NB: this procedure is recursive! */
static int /* 0=success; 1=error */
txintr_setup_skb(softc_t *sc, struct sk_buff *skb)
{
struct sk_buff *list;
int i;
/* First, handle the data in the skbuff itself. */
if (txintr_setup_frag(sc, skb->data, skb_headlen(skb)))
return 1;
/* Next, handle the VM pages in the Scatter/Gather list. */
if (skb_shinfo(skb)->nr_frags != 0)
for (i=0; i<skb_shinfo(skb)->nr_frags; i++)
{
skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
if (txintr_setup_frag(sc, page_address(frag->page) +
frag->page_offset, frag->size))
return 1;
}
/* Finally, handle the skbuffs in the frag_list. */
if ((list = skb_shinfo(skb)->frag_list) != NULL)
for (; list; list=list->next)
if (txintr_setup_skb(sc, list)) /* recursive! */
return 1;
return 0;
}
/* Setup (prepare) to transmit a packet. */
/* Select a packet, build DMA descriptors and give packet to hardware. */
/* If DMA descriptors run out, abandon the attempt and return 0. */
static int /* Linux version */
txintr_setup(softc_t *sc)
{
struct desc_ring *ring = &sc->txring;
struct dma_desc *first_desc, *last_desc;
/* Protect against half-up links: Don't transmit */
/* if the receiver can't hear the far end. */
if (sc->status.oper_status != STATUS_UP) return 0;
/* Pick a packet to transmit. */
/* linux_start() puts packets in sc->tx_skb. */
if (sc->tx_skb == NULL)
{
if (netif_queue_stopped(sc->net_dev) != 0)
netif_wake_queue(sc->net_dev);
return 0; /* no pkt to transmit */
}
/* Build DMA descriptors for an outgoing skbuff. */
ring->temp = ring->write; /* temporary ring write pointer */
if (txintr_setup_skb(sc, sc->tx_skb) != 0) return 0;
/* Enqueue the skbuff; txintr_cleanup will free it. */
skbuff_enqueue(ring, sc->tx_skb);
/* The transmitter has room for another packet. */
sc->tx_skb = NULL;
/* Set first & last segment bits. */
/* last_desc is the desc BEFORE the one pointed to by ring->temp. */
first_desc = ring->write;
first_desc->control |= TLP_DCTL_TX_FIRST_SEG;
last_desc = (ring->temp==ring->first)? ring->last : ring->temp-1;
last_desc->control |= TLP_DCTL_TX_LAST_SEG;
/* Interrupt at end-of-transmission? Why bother the poor computer! */
/* last_desc->control |= TLP_DCTL_TX_INTERRUPT; */
/* Make sure the OWNER bit is not set in the next descriptor. */
/* The OWNER bit may have been set if a previous call aborted. */
ring->temp->status = 0;
/* Commit the DMA descriptors to the software. */
ring->write = ring->temp;
/* Before setting the OWNER bit, flush the cache (memory barrier). */
wmb(); /* write memory barrier */
/* Commit the DMA descriptors to the hardware. */
first_desc->status = TLP_DSTS_OWNER;
/* Notify the transmitter that there is another packet to send. */
WRITE_CSR(TLP_TX_POLL, 1);
sc->net_dev->trans_start = jiffies;
return 1; /* did something */
}
#endif /* __linux__ */
static void
check_intr_status(softc_t *sc)
{
u_int32_t status, cfcs, op_mode;
u_int32_t missed, overruns;
/* Check for four unusual events:
* 1) fatal PCI bus errors - some are recoverable
* 2) transmitter FIFO underruns - increase fifo threshold
* 3) receiver FIFO overruns - clear potential hangup
* 4) no receive descs or bufs - count missed packets
*/
/* 1) A fatal bus error causes a Tulip to stop initiating bus cycles. */
/* Module unload/load or boot are the only fixes for Parity Errors. */
/* Master and Target Aborts can be cleared and life may continue. */
status = READ_CSR(TLP_STATUS);
if ((status & TLP_STAT_FATAL_ERROR) != 0)
{
u_int32_t fatal = (status & TLP_STAT_FATAL_BITS)>>TLP_STAT_FATAL_SHIFT;
printf("%s: FATAL PCI BUS ERROR: %s%s%s%s\n", NAME_UNIT,
(fatal == 0) ? "PARITY ERROR" : "",
(fatal == 1) ? "MASTER ABORT" : "",
(fatal == 2) ? "TARGET ABORT" : "",
(fatal >= 3) ? "RESERVED (?)" : "");
cfcs = READ_PCI_CFG(sc, TLP_CFCS); /* try to clear it */
cfcs &= ~(TLP_CFCS_MSTR_ABORT | TLP_CFCS_TARG_ABORT);
WRITE_PCI_CFG(sc, TLP_CFCS, cfcs);
}
/* 2) If the transmitter fifo underruns, increase the transmit fifo */
/* threshold: the number of bytes required to be in the fifo */
/* before starting the transmitter (cost: increased tx delay). */
/* The TX_FSM must be stopped to change this parameter. */
if ((status & TLP_STAT_TX_UNDERRUN) != 0)
{
op_mode = READ_CSR(TLP_OP_MODE);
/* enable store-and-forward mode if tx_threshold tops out? */
if ((op_mode & TLP_OP_TX_THRESH) < TLP_OP_TX_THRESH)
{
op_mode += 0x4000; /* increment TX_THRESH field; can't overflow */
WRITE_CSR(TLP_OP_MODE, op_mode & ~TLP_OP_TX_RUN);
/* Wait for the TX FSM to stop; it might be processing a pkt. */
while (READ_CSR(TLP_STATUS) & TLP_STAT_TX_FSM); /* XXX HANG */
WRITE_CSR(TLP_OP_MODE, op_mode); /* restart tx */
if (DRIVER_DEBUG)
printf("%s: tx underrun; tx fifo threshold now %d bytes\n",
NAME_UNIT, 128<<((op_mode>>TLP_OP_TR_SHIFT)&3));
}
}
/* 3) Errata memo from Digital Equipment Corp warns that 21140A */
/* receivers through rev 2.2 can hang if the fifo overruns. */
/* Recommended fix: stop and start the RX FSM after an overrun. */
missed = READ_CSR(TLP_MISSED);
if ((overruns = ((missed & TLP_MISS_OVERRUN)>>TLP_OVERRUN_SHIFT)) != 0)
{
if (DRIVER_DEBUG)
printf("%s: rx overrun cntr=%d\n", NAME_UNIT, overruns);
sc->status.cntrs.overruns += overruns;
if ((READ_PCI_CFG(sc, TLP_CFRV) & 0xFF) <= 0x22)
{
op_mode = READ_CSR(TLP_OP_MODE);
WRITE_CSR(TLP_OP_MODE, op_mode & ~TLP_OP_RX_RUN);
/* Wait for the RX FSM to stop; it might be processing a pkt. */
while (READ_CSR(TLP_STATUS) & TLP_STAT_RX_FSM); /* XXX HANG */
WRITE_CSR(TLP_OP_MODE, op_mode); /* restart rx */
}
}
/* 4) When the receiver is enabled and a packet arrives, but no DMA */
/* descriptor is available, the packet is counted as 'missed'. */
/* The receiver should never miss packets; warn if it happens. */
if ((missed = (missed & TLP_MISS_MISSED)) != 0)
{
if (DRIVER_DEBUG)
printf("%s: rx missed %d pkts\n", NAME_UNIT, missed);
sc->status.cntrs.missed += missed;
}
}
static void /* This is where the work gets done. */
core_interrupt(void *arg, int check_status)
{
softc_t *sc = arg;
int activity;
/* If any CPU is inside this critical section, then */
/* other CPUs should go away without doing anything. */
if (BOTTOM_TRYLOCK == 0)
{
sc->status.cntrs.lck_intr++;
return;
}
/* Clear pending card interrupts. */
WRITE_CSR(TLP_STATUS, READ_CSR(TLP_STATUS));
/* In Linux, pci_alloc_consistent() means DMA descriptors */
/* don't need explicit syncing. */
#if BSD
{
struct desc_ring *ring = &sc->txring;
DMA_SYNC(sc->txring.map, sc->txring.size_descs,
BUS_DMASYNC_POSTREAD | BUS_DMASYNC_POSTWRITE);
ring = &sc->rxring;
DMA_SYNC(sc->rxring.map, sc->rxring.size_descs,
BUS_DMASYNC_POSTREAD | BUS_DMASYNC_POSTWRITE);
}
#endif
do /* This is the main loop for interrupt processing. */
{
activity = txintr_cleanup(sc);
activity += txintr_setup(sc);
activity += rxintr_cleanup(sc);
activity += rxintr_setup(sc);
} while (activity);
#if BSD
{
struct desc_ring *ring = &sc->txring;
DMA_SYNC(sc->txring.map, sc->txring.size_descs,
BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE);
ring = &sc->rxring;
DMA_SYNC(sc->rxring.map, sc->rxring.size_descs,
BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE);
}
#endif
/* As the interrupt is dismissed, check for four unusual events. */
if (check_status) check_intr_status(sc);
BOTTOM_UNLOCK;
}
/* user_interrupt() may be called from a syscall or a softirq */
static void
user_interrupt(softc_t *sc, int check_status)
{
DISABLE_INTR; /* noop on FreeBSD-5 and Linux */
core_interrupt(sc, check_status);
ENABLE_INTR; /* noop on FreeBSD-5 and Linux */
}
#if BSD
# if (defined(__FreeBSD__) && defined(DEVICE_POLLING))
/* Service the card from the kernel idle loop without interrupts. */
static int
fbsd_poll(struct ifnet *ifp, enum poll_cmd cmd, int count)
{
softc_t *sc = IFP2SC(ifp);
#if (__FreeBSD_version < 700000)
if ((ifp->if_capenable & IFCAP_POLLING) == 0)
{
ether_poll_deregister(ifp);
cmd = POLL_DEREGISTER;
}
if (cmd == POLL_DEREGISTER)
{
/* Last call -- reenable card interrupts. */
WRITE_CSR(TLP_INT_ENBL, TLP_INT_TXRX);
return 0;
}
#endif
sc->quota = count;
core_interrupt(sc, (cmd==POLL_AND_CHECK_STATUS));
return 0;
}
# endif /* (__FreeBSD__ && DEVICE_POLLING) */
/* BSD kernels call this procedure when an interrupt happens. */
static intr_return_t
bsd_interrupt(void *arg)
{
softc_t *sc = arg;
/* Cut losses early if this is not our interrupt. */
if ((READ_CSR(TLP_STATUS) & TLP_INT_TXRX) == 0)
return IRQ_NONE;
# if (defined(__FreeBSD__) && defined(DEVICE_POLLING))
if (sc->ifp->if_capenable & IFCAP_POLLING)
return IRQ_NONE;
if ((sc->ifp->if_capabilities & IFCAP_POLLING) &&
(ether_poll_register(fbsd_poll, sc->ifp)))
{
WRITE_CSR(TLP_INT_ENBL, TLP_INT_DISABLE);
return IRQ_NONE;
}
else
sc->quota = sc->rxring.num_descs; /* input flow control */
# endif /* (__FreeBSD__ && DEVICE_POLLING) */
/* Disable card interrupts. */
WRITE_CSR(TLP_INT_ENBL, TLP_INT_DISABLE);
core_interrupt(sc, 0);
/* Enable card interrupts. */
WRITE_CSR(TLP_INT_ENBL, TLP_INT_TXRX);
return IRQ_HANDLED;
}
#endif /* BSD */
/* Administrative status of the driver (UP or DOWN) has changed. */
/* A card-specific action may be required: T1 and T3 cards: no-op. */
/* HSSI and SSI cards change the state of modem ready signals. */
static void
set_status(softc_t *sc, int status)
{
struct ioctl ioctl;
ioctl.cmd = IOCTL_SET_STATUS;
ioctl.data = status;
sc->card->ioctl(sc, &ioctl);
}
#if P2P
/* Callout from P2P: */
/* Get the state of DCD (Data Carrier Detect). */
static int
p2p_getmdm(struct p2pcom *p2p, caddr_t result)
{
softc_t *sc = IFP2SC(&p2p->p2p_if);
/* Non-zero isn't good enough; TIOCM_CAR is 0x40. */
*(int *)result = (sc->status.oper_status==STATUS_UP) ? TIOCM_CAR : 0;
return 0;
}
/* Callout from P2P: */
/* Set the state of DTR (Data Terminal Ready). */
static int
p2p_mdmctl(struct p2pcom *p2p, int flag)
{
softc_t *sc = IFP2SC(&p2p->p2p_if);
set_status(sc, flag);
return 0;
}
#endif /* P2P */
#if NSPPP
# ifndef PP_FR
# define PP_FR 0
# endif
/* Callout from SPPP: */
static void
sppp_tls(struct sppp *sppp)
{
# ifdef __FreeBSD__
if (!(sppp->pp_mode & IFF_LINK2) &&
!(sppp->pp_flags & PP_FR))
# elif defined(__NetBSD__) || defined(__OpenBSD__)
if (!(sppp->pp_flags & PP_CISCO))
# endif
sppp->pp_up(sppp);
}
/* Callout from SPPP: */
static void
sppp_tlf(struct sppp *sppp)
{
# ifdef __FreeBSD__
if (!(sppp->pp_mode & IFF_LINK2) &&
!(sppp->pp_flags & PP_FR))
# elif defined(__NetBSD__) || defined(__OpenBSD__)
if (!(sppp->pp_flags & PP_CISCO))
# endif
sppp->pp_down(sppp);
}
#endif /* NSPPP */
/* Configure line protocol stuff.
* Called by attach_card() during module init.
* Called by core_ioctl() when lmcconfig writes sc->config.
* Called by detach_card() during module shutdown.
*/
static void
config_proto(softc_t *sc, struct config *config)
{
/* Use line protocol stack instead of RAWIP mode. */
if ((sc->config.line_pkg == PKG_RAWIP) &&
(config->line_pkg != PKG_RAWIP))
{
#if NSPPP
LMC_BPF_DETACH;
sppp_attach(sc->ifp);
LMC_BPF_ATTACH(DLT_PPP, 4);
sc->sppp->pp_tls = sppp_tls;
sc->sppp->pp_tlf = sppp_tlf;
/* Force reconfiguration of SPPP params. */
sc->config.line_prot = 0;
sc->config.keep_alive = config->keep_alive ? 0:1;
#elif P2P
int error = 0;
sc->p2p->p2p_proto = 0; /* force p2p_attach */
if ((error = p2p_attach(sc->p2p))) /* calls bpfattach() */
{
printf("%s: p2p_attach() failed; error %d\n", NAME_UNIT, error);
config->line_pkg = PKG_RAWIP; /* still in RAWIP mode */
}
else
{
sc->p2p->p2p_mdmctl = p2p_mdmctl; /* set DTR */
sc->p2p->p2p_getmdm = p2p_getmdm; /* get DCD */
}
#elif GEN_HDLC
int error = 0;
sc->net_dev->mtu = HDLC_MAX_MTU;
if ((error = hdlc_open(sc->net_dev)))
{
printf("%s: hdlc_open() failed; error %d\n", NAME_UNIT, error);
printf("%s: Try 'sethdlc %s ppp'\n", NAME_UNIT, NAME_UNIT);
config->line_pkg = PKG_RAWIP; /* still in RAWIP mode */
}
#else /* no line protocol stack was configured */
config->line_pkg = PKG_RAWIP; /* still in RAWIP mode */
#endif
}
/* Bypass line protocol stack and return to RAWIP mode. */
if ((sc->config.line_pkg != PKG_RAWIP) &&
(config->line_pkg == PKG_RAWIP))
{
#if NSPPP
LMC_BPF_DETACH;
sppp_flush(sc->ifp);
sppp_detach(sc->ifp);
setup_ifnet(sc->ifp);
LMC_BPF_ATTACH(DLT_RAW, 0);
#elif P2P
int error = 0;
if_qflush(&sc->p2p->p2p_isnd);
if ((error = p2p_detach(sc->p2p)))
{
printf("%s: p2p_detach() failed; error %d\n", NAME_UNIT, error);
printf("%s: Try 'ifconfig %s down -remove'\n", NAME_UNIT, NAME_UNIT);
config->line_pkg = PKG_P2P; /* not in RAWIP mode; still attached to P2P */
}
else
{
setup_ifnet(sc->ifp);
LMC_BPF_ATTACH(DLT_RAW, 0);
}
#elif GEN_HDLC
hdlc_proto_detach(sc->hdlc_dev);
hdlc_close(sc->net_dev);
setup_netdev(sc->net_dev);
#endif
}
#if NSPPP
if (config->line_pkg != PKG_RAWIP)
{
/* Check for change to PPP protocol. */
if ((sc->config.line_prot != PROT_PPP) &&
(config->line_prot == PROT_PPP))
{
LMC_BPF_DETACH;
# if (defined(__NetBSD__) || defined(__OpenBSD__))
sc->sppp->pp_flags &= ~PP_CISCO;
# elif defined(__FreeBSD__)
sc->ifp->if_flags &= ~IFF_LINK2;
sc->sppp->pp_flags &= ~PP_FR;
# endif
LMC_BPF_ATTACH(DLT_PPP, 4);
sppp_ioctl(sc->ifp, SIOCSIFFLAGS, NULL);
}
# ifndef DLT_C_HDLC
# define DLT_C_HDLC DLT_PPP
# endif
/* Check for change to C_HDLC protocol. */
if ((sc->config.line_prot != PROT_C_HDLC) &&
(config->line_prot == PROT_C_HDLC))
{
LMC_BPF_DETACH;
# if (defined(__NetBSD__) || defined(__OpenBSD__))
sc->sppp->pp_flags |= PP_CISCO;
# elif defined(__FreeBSD__)
sc->ifp->if_flags |= IFF_LINK2;
sc->sppp->pp_flags &= ~PP_FR;
# endif
LMC_BPF_ATTACH(DLT_C_HDLC, 4);
sppp_ioctl(sc->ifp, SIOCSIFFLAGS, NULL);
}
/* Check for change to Frame Relay protocol. */
if ((sc->config.line_prot != PROT_FRM_RLY) &&
(config->line_prot == PROT_FRM_RLY))
{
LMC_BPF_DETACH;
# if (defined(__NetBSD__) || defined(__OpenBSD__))
sc->sppp->pp_flags &= ~PP_CISCO;
# elif defined(__FreeBSD__)
sc->ifp->if_flags &= ~IFF_LINK2;
sc->sppp->pp_flags |= PP_FR;
# endif
LMC_BPF_ATTACH(DLT_FRELAY, 4);
sppp_ioctl(sc->ifp, SIOCSIFFLAGS, NULL);
}
/* Check for disabling keep-alives. */
if ((sc->config.keep_alive != 0) &&
(config->keep_alive == 0))
sc->sppp->pp_flags &= ~PP_KEEPALIVE;
/* Check for enabling keep-alives. */
if ((sc->config.keep_alive == 0) &&
(config->keep_alive != 0))
sc->sppp->pp_flags |= PP_KEEPALIVE;
}
#endif /* NSPPP */
/* Loop back through the TULIP Ethernet chip; (no CRC). */
/* Data sheet says stop DMA before changing OPMODE register. */
/* But that's not as simple as it sounds; works anyway. */
/* Check for enabling loopback thru Tulip chip. */
if ((sc->config.loop_back != CFG_LOOP_TULIP) &&
(config->loop_back == CFG_LOOP_TULIP))
{
u_int32_t op_mode = READ_CSR(TLP_OP_MODE);
op_mode |= TLP_OP_INT_LOOP;
WRITE_CSR(TLP_OP_MODE, op_mode);
config->crc_len = CFG_CRC_0;
}
/* Check for disabling loopback thru Tulip chip. */
if ((sc->config.loop_back == CFG_LOOP_TULIP) &&
(config->loop_back != CFG_LOOP_TULIP))
{
u_int32_t op_mode = READ_CSR(TLP_OP_MODE);
op_mode &= ~TLP_OP_LOOP_MODE;
WRITE_CSR(TLP_OP_MODE, op_mode);
config->crc_len = CFG_CRC_16;
}
}
/* This is the core ioctl procedure. */
/* It handles IOCTLs from lmcconfig(8). */
/* It must not run when card watchdogs run. */
/* Called from a syscall (user context; no spinlocks). */
/* This procedure can SLEEP. */
static int
core_ioctl(softc_t *sc, u_long cmd, caddr_t data)
{
struct iohdr *iohdr = (struct iohdr *) data;
struct ioctl *ioctl = (struct ioctl *) data;
struct status *status = (struct status *) data;
struct config *config = (struct config *) data;
int error = 0;
/* All structs start with a string and a cookie. */
if (((struct iohdr *)data)->cookie != NGM_LMC_COOKIE)
return EINVAL;
while (TOP_TRYLOCK == 0)
{
sc->status.cntrs.lck_ioctl++;
SLEEP(10000); /* yield? */
}
switch (cmd)
{
case LMCIOCGSTAT:
{
*status = sc->status;
iohdr->cookie = NGM_LMC_COOKIE;
break;
}
case LMCIOCGCFG:
{
*config = sc->config;
iohdr->cookie = NGM_LMC_COOKIE;
break;
}
case LMCIOCSCFG:
{
if ((error = CHECK_CAP)) break;
config_proto(sc, config);
sc->config = *config;
sc->card->config(sc);
break;
}
case LMCIOCREAD:
{
if (ioctl->cmd == IOCTL_RW_PCI)
{
if (ioctl->address > 252) { error = EFAULT; break; }
ioctl->data = READ_PCI_CFG(sc, ioctl->address);
}
else if (ioctl->cmd == IOCTL_RW_CSR)
{
if (ioctl->address > 15) { error = EFAULT; break; }
ioctl->data = READ_CSR(ioctl->address*TLP_CSR_STRIDE);
}
else if (ioctl->cmd == IOCTL_RW_SROM)
{
if (ioctl->address > 63) { error = EFAULT; break; }
ioctl->data = read_srom(sc, ioctl->address);
}
else if (ioctl->cmd == IOCTL_RW_BIOS)
ioctl->data = read_bios(sc, ioctl->address);
else if (ioctl->cmd == IOCTL_RW_MII)
ioctl->data = read_mii(sc, ioctl->address);
else if (ioctl->cmd == IOCTL_RW_FRAME)
ioctl->data = read_framer(sc, ioctl->address);
else
error = EINVAL;
break;
}
case LMCIOCWRITE:
{
if ((error = CHECK_CAP)) break;
if (ioctl->cmd == IOCTL_RW_PCI)
{
if (ioctl->address > 252) { error = EFAULT; break; }
WRITE_PCI_CFG(sc, ioctl->address, ioctl->data);
}
else if (ioctl->cmd == IOCTL_RW_CSR)
{
if (ioctl->address > 15) { error = EFAULT; break; }
WRITE_CSR(ioctl->address*TLP_CSR_STRIDE, ioctl->data);
}
else if (ioctl->cmd == IOCTL_RW_SROM)
{
if (ioctl->address > 63) { error = EFAULT; break; }
write_srom(sc, ioctl->address, ioctl->data); /* can sleep */
}
else if (ioctl->cmd == IOCTL_RW_BIOS)
{
if (ioctl->address == 0) erase_bios(sc);
write_bios(sc, ioctl->address, ioctl->data); /* can sleep */
}
else if (ioctl->cmd == IOCTL_RW_MII)
write_mii(sc, ioctl->address, ioctl->data);
else if (ioctl->cmd == IOCTL_RW_FRAME)
write_framer(sc, ioctl->address, ioctl->data);
else if (ioctl->cmd == IOCTL_WO_SYNTH)
write_synth(sc, (struct synth *)&ioctl->data);
else if (ioctl->cmd == IOCTL_WO_DAC)
{
write_dac(sc, 0x9002); /* set Vref = 2.048 volts */
write_dac(sc, ioctl->data & 0xFFF);
}
else
error = EINVAL;
break;
}
case LMCIOCTL:
{
if ((error = CHECK_CAP)) break;
if (ioctl->cmd == IOCTL_XILINX_RESET)
{
reset_xilinx(sc);
sc->card->config(sc);
}
else if (ioctl->cmd == IOCTL_XILINX_ROM)
{
load_xilinx_from_rom(sc); /* can sleep */
sc->card->config(sc);
}
else if (ioctl->cmd == IOCTL_XILINX_FILE)
{
/* load_xilinx_from_file() can sleep. */
error = load_xilinx_from_file(sc, ioctl->ucode, ioctl->data);
if (error != 0) load_xilinx_from_rom(sc); /* try the rom */
sc->card->config(sc);
set_status(sc, (error==0)); /* XXX */
}
else if (ioctl->cmd == IOCTL_RESET_CNTRS)
{
memset(&sc->status.cntrs, 0, sizeof(struct event_cntrs));
microtime(&sc->status.cntrs.reset_time);
}
else
error = sc->card->ioctl(sc, ioctl); /* can sleep */
break;
}
default:
error = EINVAL;
break;
}
TOP_UNLOCK;
return error;
}
/* This is the core watchdog procedure. */
/* It calculates link speed, and calls the card-specific watchdog code. */
/* Calls interrupt() in case one got lost; also kick-starts the device. */
/* ioctl syscalls and card watchdog routines must be interlocked. */
/* This procedure must not sleep. */
static void
core_watchdog(softc_t *sc)
{
/* Read and restart the Tulip timer. */
u_int32_t tx_speed = READ_CSR(TLP_TIMER);
WRITE_CSR(TLP_TIMER, 0xFFFF);
/* Measure MII clock using a timer in the Tulip chip.
* This timer counts transmitter bits divided by 4096.
* Since this is called once a second the math is easy.
* This is only correct when the link is NOT sending pkts.
* On a fully-loaded link, answer will be HALF actual rate.
* Clock rate during pkt is HALF clk rate between pkts.
* Measuring clock rate really measures link utilization!
*/
sc->status.tx_speed = (0xFFFF - (tx_speed & 0xFFFF)) << 12;
/* The first status reset time is when the calendar clock is set. */
if (sc->status.cntrs.reset_time.tv_sec < 1000)
microtime(&sc->status.cntrs.reset_time);
/* Update hardware (operational) status. */
/* Call the card-specific watchdog routines. */
if (TOP_TRYLOCK != 0)
{
sc->status.oper_status = sc->card->watchdog(sc);
/* Increment a counter which tells user-land */
/* observers that SNMP state has been updated. */
sc->status.ticks++;
TOP_UNLOCK;
}
else
sc->status.cntrs.lck_watch++;
/* In case an interrupt gets lost... */
user_interrupt(sc, 1);
}
#if IFNET
/* Called from a syscall (user context; no spinlocks). */
static int
lmc_raw_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data)
{
struct ifreq *ifr = (struct ifreq *) data;
int error = 0;
switch (cmd)
{
# if (defined(__FreeBSD__) && defined(DEVICE_POLLING)) /* XXX necessary? */
case SIOCSIFCAP:
# endif
case SIOCSIFDSTADDR:
case SIOCAIFADDR:
case SIOCSIFFLAGS:
#if 0
case SIOCADDMULTI:
case SIOCDELMULTI:
break;
#endif
case SIOCSIFADDR:
ifp->if_flags |= IFF_UP; /* a Unix tradition */
break;
case SIOCSIFMTU:
ifp->if_mtu = ifr->ifr_mtu;
break;
default:
error = EINVAL;
break;
}
return error;
}
/* Called from a syscall (user context; no spinlocks). */
static int
lmc_ifnet_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data)
{
softc_t *sc = IFP2SC(ifp);
# ifdef __OpenBSD__
struct ifreq *ifr = (struct ifreq *) data;
# endif
int error = 0;
switch (cmd)
{
/* Catch the IOCTLs used by lmcconfig. */
case LMCIOCGSTAT:
case LMCIOCGCFG:
case LMCIOCSCFG:
case LMCIOCREAD:
case LMCIOCWRITE:
case LMCIOCTL:
error = core_ioctl(sc, cmd, data);
break;
# ifdef __OpenBSD__
/* Catch the IOCTLs used by ifconfig. */
case SIOCSIFMEDIA:
if ((error = CHECK_CAP)) break;
case SIOCGIFMEDIA:
error = ifmedia_ioctl(ifp, ifr, &sc->ifm, cmd);
break;
case SIOCSIFTIMESLOT:
if ((error = CHECK_CAP)) break;
if (sc->status.card_type == TLP_CSID_T1E1)
{
struct config config = sc->config;
if ((error = copyin(ifr->ifr_data, &config.time_slots,
sizeof config.time_slots))) break;
config.iohdr.cookie = NGM_LMC_COOKIE;
error = core_ioctl(sc, LMCIOCSCFG, (caddr_t)&config);
}
else
error = EINVAL;
break;
case SIOCGIFTIMESLOT:
if (sc->status.card_type == TLP_CSID_T1E1)
error = copyout(&sc->config.time_slots, ifr->ifr_data,
sizeof sc->config.time_slots);
else
error = EINVAL;
break;
# endif
/* Pass the rest to the line protocol. */
default:
if (sc->config.line_pkg == PKG_RAWIP)
error = lmc_raw_ioctl(ifp, cmd, data);
else
# if NSPPP
error = sppp_ioctl(ifp, cmd, data);
# elif P2P
error = p2p_ioctl(ifp, cmd, data);
# else
error = EINVAL;
# endif
break;
}
if (DRIVER_DEBUG && (error!=0))
printf("%s: lmc_ifnet_ioctl; cmd=0x%08lx error=%d\n",
NAME_UNIT, cmd, error);
return error;
}
/* Called from a syscall (user context; no spinlocks). */
static void
lmc_ifnet_start(struct ifnet *ifp)
{
softc_t *sc = IFP2SC(ifp);
/* Start the transmitter; incoming pkts are NOT processed. */
user_interrupt(sc, 0);
}
/* sppp and p2p replace this with their own proc. */
/* RAWIP mode is the only time this is used. */
/* Called from a syscall (user context; no spinlocks). */
static int
lmc_raw_output(struct ifnet *ifp, struct mbuf *m,
struct sockaddr *dst, struct route *ro)
{
softc_t *sc = IFP2SC(ifp);
int error = 0;
/* Fail if the link is down. */
if (sc->status.oper_status != STATUS_UP)
{
m_freem(m);
sc->status.cntrs.odiscards++;
if (DRIVER_DEBUG)
printf("%s: lmc_raw_output: tx pkt discarded: link down\n", NAME_UNIT);
return ENETDOWN;
}
# if NETGRAPH
/* Netgraph has priority over the ifnet kernel interface. */
if (sc->ng_hook != NULL)
{
m_freem(m);
sc->status.cntrs.odiscards++;
if (DRIVER_DEBUG)
printf("%s: lmc_raw_output: tx pkt discarded: netgraph active\n",
NAME_UNIT);
return EBUSY;
}
# endif
/* lmc_raw_output() ENQUEUEs in a syscall or softirq. */
/* txintr_setup() DEQUEUEs in a hard interrupt. */
/* Some BSD QUEUE routines are not interrupt-safe. */
{
DISABLE_INTR;
# if (__FreeBSD_version >= 503000)
IFQ_ENQUEUE(&ifp->if_snd, m, error);
# else
IFQ_ENQUEUE(&ifp->if_snd, m, NULL, error);
# endif
ENABLE_INTR;
}
if (error==0)
user_interrupt(sc, 0); /* start the transmitter */
else
{
m_freem(m);
sc->status.cntrs.odiscards++;
if (DRIVER_DEBUG)
printf("%s: lmc_raw_output: IFQ_ENQUEUE() failed; error %d\n",
NAME_UNIT, error);
}
return error;
}
/* Called from a softirq once a second. */
static void
lmc_watchdog(void *arg)
{
struct ifnet *ifp = arg;
softc_t *sc = IFP2SC(ifp);
u_int8_t old_oper_status = sc->status.oper_status;
struct event_cntrs *cntrs = &sc->status.cntrs;
core_watchdog(sc); /* updates oper_status */
#if NETGRAPH
if (sc->ng_hook != NULL)
{
sc->status.line_pkg = PKG_NG;
sc->status.line_prot = 0;
}
else
#endif
if (sc->config.line_pkg == PKG_RAWIP)
{
sc->status.line_pkg = PKG_RAWIP;
sc->status.line_prot = PROT_IP_HDLC;
}
else
{
# if P2P
/* Notice change in link status. */
if ((old_oper_status != sc->status.oper_status) && (sc->p2p->p2p_modem))
(*sc->p2p->p2p_modem)(sc->p2p, sc->status.oper_status==STATUS_UP);
/* Notice change in line protocol. */
sc->status.line_pkg = PKG_P2P;
switch (sc->ifp->if_type)
{
case IFT_PPP:
sc->status.line_prot = PROT_PPP;
break;
case IFT_PTPSERIAL:
sc->status.line_prot = PROT_C_HDLC;
break;
case IFT_FRELAY:
sc->status.line_prot = PROT_FRM_RLY;
break;
default:
sc->status.line_prot = 0;
break;
}
# elif NSPPP
/* Notice change in link status. */
if ((old_oper_status != STATUS_UP) &&
(sc->status.oper_status == STATUS_UP)) /* link came up */
sppp_tls(sc->sppp);
if ((old_oper_status == STATUS_UP) &&
(sc->status.oper_status != STATUS_UP)) /* link went down */
sppp_tlf(sc->sppp);
/* Notice change in line protocol. */
sc->status.line_pkg = PKG_SPPP;
# ifdef __FreeBSD__
if (sc->sppp->pp_flags & PP_FR)
sc->status.line_prot = PROT_FRM_RLY;
else if (sc->ifp->if_flags & IFF_LINK2)
# elif (defined(__NetBSD__) || defined(__OpenBSD__))
if (sc->sppp->pp_flags & PP_CISCO)
# endif
sc->status.line_prot = PROT_C_HDLC;
else
sc->status.line_prot = PROT_PPP;
# else
/* Suppress compiler warning. */
if (old_oper_status == STATUS_UP);
# endif
}
/* Copy statistics from sc to ifp. */
ifp->if_baudrate = sc->status.tx_speed;
ifp->if_ipackets = cntrs->ipackets;
ifp->if_opackets = cntrs->opackets;
ifp->if_ibytes = cntrs->ibytes;
ifp->if_obytes = cntrs->obytes;
ifp->if_ierrors = cntrs->ierrors;
ifp->if_oerrors = cntrs->oerrors;
ifp->if_iqdrops = cntrs->idiscards;
# if ((__FreeBSD_version >= 500000) || defined(__OpenBSD__) || defined(__NetBSD__))
if (sc->status.oper_status == STATUS_UP)
ifp->if_link_state = LINK_STATE_UP;
else
ifp->if_link_state = LINK_STATE_DOWN;
# endif
/* Call this procedure again after one second. */
callout_reset(&sc->callout, hz, lmc_watchdog, ifp);
}
# ifdef __OpenBSD__
/* Callback from ifmedia. */
static int
ifmedia_change(struct ifnet *ifp)
{
softc_t *sc = IFP2SC(ifp);
struct config config = sc->config;
int media = sc->ifm.ifm_media;
int error;
/* ifconfig lmc0 media t1 */
if (sc->status.card_type == TLP_CSID_T3)
{
if ((media & IFM_TMASK) == IFM_TDM_T3)
config.format = CFG_FORMAT_T3CPAR;
else if ((media & IFM_TMASK) == IFM_TDM_T3_M13)
config.format = CFG_FORMAT_T3M13;
}
else if (sc->status.card_type == TLP_CSID_T1E1)
{
if ((media & IFM_TMASK) == IFM_TDM_T1)
config.format = CFG_FORMAT_T1ESF;
else if ((media & IFM_TMASK) == IFM_TDM_T1_AMI)
config.format = CFG_FORMAT_T1SF;
else if ((media & IFM_TMASK) == IFM_TDM_E1)
config.format = CFG_FORMAT_E1NONE;
else if ((media & IFM_TMASK) == IFM_TDM_E1_G704)
config.format = CFG_FORMAT_E1FASCRC;
}
/* ifconfig lmc0 mediaopt loopback */
if (media & IFM_LOOP)
config.loop_back = CFG_LOOP_TULIP;
else
config.loop_back = CFG_LOOP_NONE;
/* ifconfig lmc0 mediaopt crc16 */
if (media & IFM_TDM_HDLC_CRC16)
config.crc_len = CFG_CRC_16;
else
config.crc_len = CFG_CRC_32;
/* Set ConFiGuration. */
config.iohdr.cookie = NGM_LMC_COOKIE;
error = core_ioctl(sc, LMCIOCSCFG, (caddr_t)&config);
return error;
}
/* Callback from ifmedia. */
static void
ifmedia_status(struct ifnet *ifp, struct ifmediareq *ifmr)
{
softc_t *sc = IFP2SC(ifp);
/* ifconfig wants to know if the hardware link is up. */
ifmr->ifm_status = IFM_AVALID;
if (sc->status.oper_status == STATUS_UP)
ifmr->ifm_status |= IFM_ACTIVE;
ifmr->ifm_active = sc->ifm.ifm_cur->ifm_media;
if (sc->config.loop_back != CFG_LOOP_NONE)
ifmr->ifm_active |= IFM_LOOP;
if (sc->config.crc_len == CFG_CRC_16)
ifmr->ifm_active |= IFM_TDM_HDLC_CRC16;
}
# endif /* __OpenBSD__ */
static void
setup_ifnet(struct ifnet *ifp)
{
softc_t *sc = ifp->if_softc;
/* Initialize the generic network interface. */
/* Note similarity to linux's setup_netdev(). */
ifp->if_flags = IFF_POINTOPOINT;
ifp->if_flags |= IFF_RUNNING;
ifp->if_ioctl = lmc_ifnet_ioctl;
ifp->if_start = lmc_ifnet_start; /* sppp changes this */
ifp->if_output = lmc_raw_output; /* sppp & p2p change this */
ifp->if_input = lmc_raw_input;
ifp->if_mtu = MAX_DESC_LEN; /* sppp & p2p change this */
ifp->if_type = IFT_PTPSERIAL; /* p2p changes this */
# if (defined(__FreeBSD__) && defined(DEVICE_POLLING))
ifp->if_capabilities |= IFCAP_POLLING;
ifp->if_capenable |= IFCAP_POLLING_NOCOUNT;
# if (__FreeBSD_version < 500000)
ifp->if_capenable |= IFCAP_POLLING;
# endif
# endif
/* Every OS does it differently! */
# if (defined(__FreeBSD__) && (__FreeBSD_version < 502000))
(const char *)ifp->if_name = device_get_name(sc->dev);
ifp->if_unit = device_get_unit(sc->dev);
# elif (__FreeBSD_version >= 502000)
if_initname(ifp, device_get_name(sc->dev), device_get_unit(sc->dev));
# elif defined(__NetBSD__)
strcpy(ifp->if_xname, sc->dev.dv_xname);
# elif defined(__OpenBSD__)
bcopy(sc->dev.dv_xname, ifp->if_xname, IFNAMSIZ);
# elif defined(__bsdi__)
ifp->if_name = sc->dev.dv_cfdata->cf_driver->cd_name;
ifp->if_unit = sc->dev.dv_unit;
# endif
}
static int
lmc_ifnet_attach(softc_t *sc)
{
# if (__FreeBSD_version >= 600000)
sc->ifp = if_alloc(NSPPP ? IFT_PPP : IFT_OTHER);
if (sc->ifp == NULL) return ENOMEM;
# endif
# if NSPPP
# if (__FreeBSD_version >= 600000)
sc->sppp = sc->ifp->if_l2com;
# else
sc->ifp = &sc->spppcom.pp_if;
sc->sppp = &sc->spppcom;
# endif
# elif P2P
sc->ifp = &sc->p2pcom.p2p_if;
sc->p2p = &sc->p2pcom;
# elif (__FreeBSD_version < 600000)
sc->ifp = &sc->ifnet;
# endif
/* Initialize the network interface struct. */
sc->ifp->if_softc = sc;
setup_ifnet(sc->ifp);
/* ALTQ output queue initialization. */
IFQ_SET_MAXLEN(&sc->ifp->if_snd, SNDQ_MAXLEN);
IFQ_SET_READY(&sc->ifp->if_snd);
/* Attach to the ifnet kernel interface. */
if_attach(sc->ifp);
# if ((defined(__NetBSD__) && __NetBSD_Version__ >= 106000000) || \
(defined(__OpenBSD__) && OpenBSD >= 200211))
if_alloc_sadl(sc->ifp);
# endif
/* Attach Berkeley Packet Filter. */
LMC_BPF_ATTACH(DLT_RAW, 0);
# ifdef __OpenBSD__
/* Initialize ifmedia mechanism. */
ifmedia_init(&sc->ifm, IFM_OMASK | IFM_GMASK | IFM_IMASK,
ifmedia_change, ifmedia_status);
if (sc->status.card_type == TLP_CSID_T3)
{
ifmedia_add(&sc->ifm, IFM_TDM | IFM_TDM_T3, 0, NULL);
ifmedia_add(&sc->ifm, IFM_TDM | IFM_TDM_T3_M13, 0, NULL);
ifmedia_set(&sc->ifm, IFM_TDM | IFM_TDM_T3);
}
else if (sc->status.card_type == TLP_CSID_T1E1)
{
ifmedia_add(&sc->ifm, IFM_TDM | IFM_TDM_T1, 0, NULL);
ifmedia_add(&sc->ifm, IFM_TDM | IFM_TDM_T1_AMI, 0, NULL);
ifmedia_add(&sc->ifm, IFM_TDM | IFM_TDM_E1, 0, NULL);
ifmedia_add(&sc->ifm, IFM_TDM | IFM_TDM_E1_G704, 0, NULL);
ifmedia_set(&sc->ifm, IFM_TDM | IFM_TDM_T1);
}
else if ((sc->status.card_type == TLP_CSID_HSSI) ||
(sc->status.card_type == TLP_CSID_SSI))
{
ifmedia_add(&sc->ifm, IFM_TDM | IFM_NONE, 0, NULL);
ifmedia_set(&sc->ifm, IFM_TDM | IFM_NONE);
}
# endif /* __OpenBSD__ */
callout_reset(&sc->callout, hz, lmc_watchdog, sc);
return 0;
}
static void
lmc_ifnet_detach(softc_t *sc)
{
# ifdef __OpenBSD__
ifmedia_delete_instance(&sc->ifm, IFM_INST_ANY);
# endif
# if (defined(__FreeBSD__) && defined(DEVICE_POLLING))
if (sc->ifp->if_capenable & IFCAP_POLLING)
ether_poll_deregister(sc->ifp);
# endif
/* Detach Berkeley Packet Filter. */
LMC_BPF_DETACH;
# if ((defined(__NetBSD__) && __NetBSD_Version__ >= 106000000) || \
(defined(__OpenBSD__) && OpenBSD >= 200211))
if_free_sadl(sc->ifp);
# endif
/* Detach from the ifnet kernel interface. */
if_detach(sc->ifp);
# if (__FreeBSD_version >= 600000)
if_free_type(sc->ifp, NSPPP ? IFT_PPP : IFT_OTHER);
# endif
}
#endif /* IFNET */
#if NETGRAPH
/* Netgraph changed significantly between FreeBSD-4 and -5. */
/* These are backward compatibility hacks for FreeBSD-4. */
# if (__FreeBSD_version >= 500000)
/* These next two macros should be added to netgraph */
# define NG_TYPE_REF(type) atomic_add_int(&(type)->refs, 1)
# define NG_TYPE_UNREF(type) \
do { \
if ((type)->refs == 1) \
ng_rmtype(type); \
else \
atomic_subtract_int(&(type)->refs, 1); \
} while (0)
# else /* FreeBSD-4 */
# define NGI_GET_MSG(item, msg) /* nothing */
# define NG_HOOK_FORCE_QUEUE(hook) /* nothing */
# define NG_TYPE_REF(type) atomic_add_int(&(type)->refs, 1)
# define NG_TYPE_UNREF(type) \
do { \
if ((type)->refs == 1) \
LIST_REMOVE(type, types); \
else \
atomic_subtract_int(&(type)->refs, 1); \
} while (0)
# endif
/* It is an error to construct new copies of this Netgraph node. */
/* All instances are constructed by ng_attach and are persistent. */
# if (__FreeBSD_version >= 500000)
static int ng_constructor(node_p node) { return EINVAL; }
# else /* FreeBSD-4 */
static int ng_constructor(node_p *node) { return EINVAL; }
# endif
/* Incoming Netgraph control message. */
# if (__FreeBSD_version >= 500000)
static int
ng_rcvmsg(node_p node, item_p item, hook_p lasthook)
{
struct ng_mesg *msg;
# else /* FreeBSD-4 */
static int
ng_rcvmsg(node_p node, struct ng_mesg *msg,
const char *retaddr, struct ng_mesg **rptr)
{
# endif
struct ng_mesg *resp = NULL;
softc_t *sc = NG_NODE_PRIVATE(node);
int error = 0;
NGI_GET_MSG(item, msg);
if (msg->header.typecookie == NGM_LMC_COOKIE)
{
switch (msg->header.cmd)
{
case LMCIOCGSTAT:
case LMCIOCGCFG:
case LMCIOCSCFG:
case LMCIOCREAD:
case LMCIOCWRITE:
case LMCIOCTL:
{
/* Call the core ioctl procedure. */
error = core_ioctl(sc, msg->header.cmd, msg->data);
if ((msg->header.cmd & IOC_OUT) != 0)
{ /* synchronous response */
NG_MKRESPONSE(resp, msg, sizeof(struct ng_mesg) +
IOCPARM_LEN(msg->header.cmd), M_NOWAIT);
if (resp == NULL)
error = ENOMEM;
else
memcpy(resp->data, msg->data, IOCPARM_LEN(msg->header.cmd));
}
break;
}
default:
error = EINVAL;
break;
}
}
else if ((msg->header.typecookie == NGM_GENERIC_COOKIE) &&
(msg->header.cmd == NGM_TEXT_STATUS))
{ /* synchronous response */
NG_MKRESPONSE(resp, msg, sizeof(struct ng_mesg) +
NG_TEXTRESPONSE, M_NOWAIT);
if (resp == NULL)
error = ENOMEM;
else
{
char *s = resp->data;
sprintf(s, "Card type = <%s>\n"
"This driver considers the link to be %s.\n"
"Use lmcconfig to configure this interface.\n",
sc->dev_desc, (sc->status.oper_status==STATUS_UP) ? "UP" : "DOWN");
resp->header.arglen = strlen(s) +1;
}
}
else
/* Netgraph should be able to read and write these
* parameters with text-format control messages:
* SSI HSSI T1E1 T3
* crc crc crc crc
* loop loop loop loop
* clksrc clksrc
* dte dte format format
* synth synth cablen cablen
* cable timeslot scram
* gain
* pulse
* lbo
* Someday I'll implement this...
*/
error = EINVAL;
/* Handle synchronous response. */
# if (__FreeBSD_version >= 500000)
NG_RESPOND_MSG(error, node, item, resp);
NG_FREE_MSG(msg);
# else /* FreeBSD-4 */
if (rptr != NULL)
*rptr = resp;
else if (resp != NULL)
free(resp, M_NETGRAPH);
free(msg, M_NETGRAPH);
# endif
return error;
}
/* This is a persistent netgraph node. */
static int
ng_shutdown(node_p node)
{
# if (__FreeBSD_version >= 500000)
/* unless told to really die, bounce back to life */
if ((node->nd_flags & NG_REALLY_DIE)==0)
node->nd_flags &= ~NG_INVALID; /* bounce back to life */
# else /* FreeBSD-4 */
ng_cutlinks(node);
node->flags &= ~NG_INVALID; /* bounce back to life */
# endif
return 0;
}
/* ng_disconnect is the opposite of this procedure. */
static int
ng_newhook(node_p node, hook_p hook, const char *name)
{
softc_t *sc = NG_NODE_PRIVATE(node);
/* Hook name must be 'rawdata'. */
if (strncmp(name, "rawdata", 7) != 0) return EINVAL;
/* Is our hook connected? */
if (sc->ng_hook != NULL) return EBUSY;
/* Accept the hook. */
sc->ng_hook = hook;
return 0;
}
/* Both ends have accepted their hooks and the links have been made. */
/* This is the last chance to reject the connection request. */
static int
ng_connect(hook_p hook)
{
/* Probably not at splnet, force outward queueing. (huh?) */
NG_HOOK_FORCE_QUEUE(NG_HOOK_PEER(hook));
return 0; /* always accept */
}
/* Receive data in mbufs from another Netgraph node. */
/* Transmit an mbuf-chain on the communication link. */
/* This procedure is very similar to lmc_raw_output(). */
/* Called from a syscall (user context; no spinlocks). */
# if (__FreeBSD_version >= 500000)
static int
ng_rcvdata(hook_p hook, item_p item)
{
softc_t *sc = NG_NODE_PRIVATE(NG_HOOK_NODE(hook));
int error = 0;
struct mbuf *m;
meta_p meta = NULL;
NGI_GET_M(item, m);
NGI_GET_META(item, meta);
NG_FREE_ITEM(item);
# else /* FreeBSD-4 */
static int
ng_rcvdata(hook_p hook, struct mbuf *m, meta_p meta)
{
softc_t *sc = NG_NODE_PRIVATE(NG_HOOK_NODE(hook));
int error = 0;
# endif
/* This macro must not store into meta! */
NG_FREE_META(meta);
/* Fail if the link is down. */
if (sc->status.oper_status != STATUS_UP)
{
m_freem(m);
sc->status.cntrs.odiscards++;
if (DRIVER_DEBUG)
printf("%s: ng_rcvdata: tx pkt discarded: link down\n", NAME_UNIT);
return ENETDOWN;
}
/* ng_rcvdata() ENQUEUEs in a syscall or softirq. */
/* txintr_setup() DEQUEUEs in a hard interrupt. */
/* Some BSD QUEUE routines are not interrupt-safe. */
{
DISABLE_INTR;
# if (__FreeBSD_version >= 503000)
if (meta==NULL)
IFQ_ENQUEUE(&sc->ng_sndq, m, error);
else
IFQ_ENQUEUE(&sc->ng_fastq, m, error);
# else
if (meta==NULL)
IFQ_ENQUEUE(&sc->ng_sndq, m, NULL, error);
else
IFQ_ENQUEUE(&sc->ng_fastq, m, NULL, error);
# endif
ENABLE_INTR;
}
if (error==0)
user_interrupt(sc, 0); /* start the transmitter */
else
{
m_freem(m);
sc->status.cntrs.odiscards++;
if (DRIVER_DEBUG)
printf("%s: ng_rcvdata: IFQ_ENQUEUE() failed; error %d\n",
NAME_UNIT, error);
}
return error;
}
/* ng_newhook is the opposite of this procedure, not */
/* ng_connect, as you might expect from the names. */
static int
ng_disconnect(hook_p hook)
{
softc_t *sc = NG_NODE_PRIVATE(NG_HOOK_NODE(hook));
/* Disconnect the hook. */
sc->ng_hook = NULL;
return 0;
}
static
struct ng_type ng_type =
{
.version = NG_ABI_VERSION,
.name = NG_LMC_NODE_TYPE,
.mod_event = NULL,
.constructor = ng_constructor,
.rcvmsg = ng_rcvmsg,
# if (__FreeBSD_version >=503000)
.close = NULL,
# endif
.shutdown = ng_shutdown,
.newhook = ng_newhook,
.findhook = NULL,
.connect = ng_connect,
.rcvdata = ng_rcvdata,
# if (defined(__FreeBSD__) && (__FreeBSD_version < 500000))
.rcvdataq = ng_rcvdata,
# endif
.disconnect = ng_disconnect,
};
# if (IFNET == 0)
/* Called from a softirq once a second. */
static void
ng_watchdog(void *arg)
{
softc_t *sc = arg;
/* Call the core watchdog procedure. */
core_watchdog(sc);
/* Set line protocol and package status. */
sc->status.line_pkg = PKG_NG;
sc->status.line_prot = 0;
/* Call this procedure again after one second. */
callout_reset(&sc->callout, hz, ng_watchdog, sc);
}
# endif
/* Attach to the Netgraph kernel interface (/sys/netgraph).
* It is called once for each physical card during device attach.
* This is effectively ng_constructor.
*/
static int
ng_attach(softc_t *sc)
{
int error;
/* If this node type is not known to Netgraph then register it. */
if (ng_type.refs == 0) /* or: if (ng_findtype(&ng_type) == NULL) */
{
if ((error = ng_newtype(&ng_type)))
{
printf("%s: ng_newtype() failed; error %d\n", NAME_UNIT, error);
return error;
}
}
else
NG_TYPE_REF(&ng_type);
/* Call the superclass node constructor. */
if ((error = ng_make_node_common(&ng_type, &sc->ng_node)))
{
NG_TYPE_UNREF(&ng_type);
printf("%s: ng_make_node_common() failed; error %d\n", NAME_UNIT, error);
return error;
}
/* Associate a name with this netgraph node. */
if ((error = ng_name_node(sc->ng_node, NAME_UNIT)))
{
NG_NODE_UNREF(sc->ng_node);
NG_TYPE_UNREF(&ng_type);
printf("%s: ng_name_node() failed; error %d\n", NAME_UNIT, error);
return error;
}
# if (__FreeBSD_version >= 500000)
/* Initialize the send queue mutexes. */
mtx_init(&sc->ng_sndq.ifq_mtx, NAME_UNIT, "sndq", MTX_DEF);
mtx_init(&sc->ng_fastq.ifq_mtx, NAME_UNIT, "fastq", MTX_DEF);
# endif
/* Put a backpointer to the softc in the netgraph node. */
NG_NODE_SET_PRIVATE(sc->ng_node, sc);
/* ALTQ output queue initialization. */
IFQ_SET_MAXLEN(&sc->ng_fastq, SNDQ_MAXLEN);
IFQ_SET_READY(&sc->ng_fastq);
IFQ_SET_MAXLEN(&sc->ng_sndq, SNDQ_MAXLEN);
IFQ_SET_READY(&sc->ng_sndq);
# if (IFNET == 0)
/* Arrange to call ng_watchdog() once a second. */
callout_reset(&sc->callout, hz, ng_watchdog, sc);
# endif
return 0;
}
static void
ng_detach(softc_t *sc)
{
callout_drain(&sc->callout);
# if (__FreeBSD_version >= 500000)
mtx_destroy(&sc->ng_sndq.ifq_mtx);
mtx_destroy(&sc->ng_fastq.ifq_mtx);
ng_rmnode_self(sc->ng_node); /* free hook */
NG_NODE_UNREF(sc->ng_node); /* free node */
NG_TYPE_UNREF(&ng_type);
# else /* FreeBSD-4 */
ng_unname(sc->ng_node); /* free name */
ng_cutlinks(sc->ng_node); /* free hook */
NG_NODE_UNREF(sc->ng_node); /* free node */
NG_TYPE_UNREF(&ng_type);
# endif
}
#endif /* NETGRAPH */
/* The next few procedures initialize the card. */
/* Returns 0 on success; error code on failure. */
static int
startup_card(softc_t *sc)
{
int num_rx_descs, error = 0;
u_int32_t tlp_bus_pbl, tlp_bus_cal, tlp_op_tr;
u_int32_t tlp_cfdd, tlp_cfcs;
u_int32_t tlp_cflt, tlp_csid, tlp_cfit;
/* Make sure the COMMAND bits are reasonable. */
tlp_cfcs = READ_PCI_CFG(sc, TLP_CFCS);
tlp_cfcs &= ~TLP_CFCS_MWI_ENABLE;
tlp_cfcs |= TLP_CFCS_BUS_MASTER;
tlp_cfcs |= TLP_CFCS_MEM_ENABLE;
tlp_cfcs |= TLP_CFCS_IO_ENABLE;
tlp_cfcs |= TLP_CFCS_PAR_ERROR;
tlp_cfcs |= TLP_CFCS_SYS_ERROR;
WRITE_PCI_CFG(sc, TLP_CFCS, tlp_cfcs);
/* Set the LATENCY TIMER to the recommended value, */
/* and make sure the CACHE LINE SIZE is reasonable. */
tlp_cfit = READ_PCI_CFG(sc, TLP_CFIT);
tlp_cflt = READ_PCI_CFG(sc, TLP_CFLT);
tlp_cflt &= ~TLP_CFLT_LATENCY;
tlp_cflt |= (tlp_cfit & TLP_CFIT_MAX_LAT)>>16;
/* "prgmbl burst length" and "cache alignment" used below. */
switch(tlp_cflt & TLP_CFLT_CACHE)
{
case 8: /* 8 bytes per cache line */
{ tlp_bus_pbl = 32; tlp_bus_cal = 1; break; }
case 16:
{ tlp_bus_pbl = 32; tlp_bus_cal = 2; break; }
case 32:
{ tlp_bus_pbl = 32; tlp_bus_cal = 3; break; }
default:
{
tlp_bus_pbl = 32; tlp_bus_cal = 1;
tlp_cflt &= ~TLP_CFLT_CACHE;
tlp_cflt |= 8;
break;
}
}
WRITE_PCI_CFG(sc, TLP_CFLT, tlp_cflt);
/* Make sure SNOOZE and SLEEP modes are disabled. */
tlp_cfdd = READ_PCI_CFG(sc, TLP_CFDD);
tlp_cfdd &= ~TLP_CFDD_SLEEP;
tlp_cfdd &= ~TLP_CFDD_SNOOZE;
WRITE_PCI_CFG(sc, TLP_CFDD, tlp_cfdd);
DELAY(11*1000); /* Tulip wakes up in 10 ms max */
/* Software Reset the Tulip chip; stops DMA and Interrupts. */
/* This does not change the PCI config regs just set above. */
WRITE_CSR(TLP_BUS_MODE, TLP_BUS_RESET); /* self-clearing */
DELAY(5); /* Tulip is dead for 50 PCI cycles after reset. */
/* Reset the Xilinx Field Programmable Gate Array. */
reset_xilinx(sc); /* side effect: turns on all four LEDs */
/* Configure card-specific stuff (framers, line interfaces, etc.). */
sc->card->config(sc);
/* Initializing cards can glitch clocks and upset fifos. */
/* Reset the FIFOs between the Tulip and Xilinx chips. */
set_mii16_bits(sc, MII16_FIFO);
clr_mii16_bits(sc, MII16_FIFO);
/* Initialize the PCI busmode register. */
/* The PCI bus cycle type "Memory Write and Invalidate" does NOT */
/* work cleanly in any version of the 21140A, so don't enable it! */
WRITE_CSR(TLP_BUS_MODE,
(tlp_bus_cal ? TLP_BUS_READ_LINE : 0) |
(tlp_bus_cal ? TLP_BUS_READ_MULT : 0) |
(tlp_bus_pbl<<TLP_BUS_PBL_SHIFT) |
(tlp_bus_cal<<TLP_BUS_CAL_SHIFT) |
((BYTE_ORDER == BIG_ENDIAN) ? TLP_BUS_DESC_BIGEND : 0) |
((BYTE_ORDER == BIG_ENDIAN) ? TLP_BUS_DATA_BIGEND : 0) |
TLP_BUS_DSL_VAL |
TLP_BUS_ARB);
/* Pick number of RX descriptors and TX fifo threshold. */
/* tx_threshold in bytes: 0=128, 1=256, 2=512, 3=1024 */
tlp_csid = READ_PCI_CFG(sc, TLP_CSID);
switch(tlp_csid)
{
case TLP_CSID_HSSI: /* 52 Mb/s */
case TLP_CSID_HSSIc: /* 52 Mb/s */
case TLP_CSID_T3: /* 45 Mb/s */
{ num_rx_descs = 48; tlp_op_tr = 2; break; }
case TLP_CSID_SSI: /* 10 Mb/s */
{ num_rx_descs = 32; tlp_op_tr = 1; break; }
case TLP_CSID_T1E1: /* 2 Mb/s */
{ num_rx_descs = 16; tlp_op_tr = 0; break; }
default:
{ num_rx_descs = 16; tlp_op_tr = 0; break; }
}
/* Create DMA descriptors and initialize list head registers. */
if ((error = create_ring(sc, &sc->txring, NUM_TX_DESCS))) return error;
WRITE_CSR(TLP_TX_LIST, sc->txring.dma_addr);
if ((error = create_ring(sc, &sc->rxring, num_rx_descs))) return error;
WRITE_CSR(TLP_RX_LIST, sc->rxring.dma_addr);
/* Initialize the operating mode register. */
WRITE_CSR(TLP_OP_MODE, TLP_OP_INIT | (tlp_op_tr<<TLP_OP_TR_SHIFT));
/* Read the missed frame register (result ignored) to zero it. */
error = READ_CSR( TLP_MISSED); /* error is used as a bit-dump */
/* Disable rx watchdog and tx jabber features. */
WRITE_CSR(TLP_WDOG, TLP_WDOG_INIT);
/* Enable card interrupts. */
WRITE_CSR(TLP_INT_ENBL, TLP_INT_TXRX);
return 0;
}
/* Stop DMA and Interrupts; free descriptors and buffers. */
static void
shutdown_card(void *arg)
{
softc_t *sc = arg;
/* Leave the LEDs in the state they were in after power-on. */
led_on(sc, MII16_LED_ALL);
/* Software reset the Tulip chip; stops DMA and Interrupts */
WRITE_CSR(TLP_BUS_MODE, TLP_BUS_RESET); /* self-clearing */
DELAY(5); /* Tulip is dead for 50 PCI cycles after reset. */
/* Disconnect from the PCI bus except for config cycles. */
/* Hmmm; Linux syslogs a warning that IO and MEM are disabled. */
WRITE_PCI_CFG(sc, TLP_CFCS, TLP_CFCS_MEM_ENABLE | TLP_CFCS_IO_ENABLE);
/* Free the DMA descriptor rings. */
destroy_ring(sc, &sc->txring);
destroy_ring(sc, &sc->rxring);
}
/* Start the card and attach a kernel interface and line protocol. */
static int
attach_card(softc_t *sc, const char *intrstr)
{
struct config config;
u_int32_t tlp_cfrv;
u_int16_t mii3;
u_int8_t *ieee;
int i, error = 0;
/* Start the card. */
if ((error = startup_card(sc))) return error;
# if (__FreeBSD_version >= 500000)
callout_init(&sc->callout, 0);
# else /* FreeBSD-4 */
callout_init(&sc->callout);
# endif
/* Attach a kernel interface. */
#if NETGRAPH
if ((error = ng_attach(sc))) return error;
sc->flags |= FLAG_NETGRAPH;
#endif
#if IFNET
if ((error = lmc_ifnet_attach(sc))) return error;
sc->flags |= FLAG_IFNET;
#endif
/* Attach a line protocol stack. */
sc->config.line_pkg = PKG_RAWIP;
config = sc->config; /* get current config */
config.line_pkg = 0; /* select external stack */
config.line_prot = PROT_C_HDLC;
config.keep_alive = 1;
config_proto(sc, &config); /* reconfigure */
sc->config = config; /* save new configuration */
/* Print interesting hardware-related things. */
mii3 = read_mii(sc, 3);
tlp_cfrv = READ_PCI_CFG(sc, TLP_CFRV);
printf("%s: PCI rev %d.%d, MII rev %d.%d", NAME_UNIT,
(tlp_cfrv>>4) & 0xF, tlp_cfrv & 0xF, (mii3>>4) & 0xF, mii3 & 0xF);
ieee = (u_int8_t *)sc->status.ieee;
for (i=0; i<3; i++) sc->status.ieee[i] = read_srom(sc, 10+i);
printf(", IEEE addr %02x:%02x:%02x:%02x:%02x:%02x",
ieee[0], ieee[1], ieee[2], ieee[3], ieee[4], ieee[5]);
sc->card->ident(sc);
printf(" %s\n", intrstr);
/* Print interesting software-related things. */
printf("%s: Driver rev %d.%d.%d", NAME_UNIT,
DRIVER_MAJOR_VERSION, DRIVER_MINOR_VERSION, DRIVER_SUB_VERSION);
printf(", Options %s%s%s%s%s%s%s%s%s\n",
NETGRAPH ? "NETGRAPH " : "", GEN_HDLC ? "GEN_HDLC " : "",
NSPPP ? "SPPP " : "", P2P ? "P2P " : "",
ALTQ_PRESENT ? "ALTQ " : "", NBPFILTER ? "BPF " : "",
DEV_POLL ? "POLL " : "", IOREF_CSR ? "IO_CSR " : "MEM_CSR ",
(BYTE_ORDER == BIG_ENDIAN) ? "BIG_END " : "LITTLE_END ");
/* Make the local hardware ready. */
set_status(sc, 1);
return 0;
}
/* Detach from the kernel in all ways. */
static void
detach_card(softc_t *sc)
{
struct config config;
/* Make the local hardware NOT ready. */
set_status(sc, 0);
/* Detach external line protocol stack. */
if (sc->config.line_pkg != PKG_RAWIP)
{
config = sc->config;
config.line_pkg = PKG_RAWIP;
config_proto(sc, &config);
sc->config = config;
}
/* Detach kernel interfaces. */
#if NETGRAPH
if (sc->flags & FLAG_NETGRAPH)
{
IFQ_PURGE(&sc->ng_fastq);
IFQ_PURGE(&sc->ng_sndq);
ng_detach(sc);
sc->flags &= ~FLAG_NETGRAPH;
}
#endif
#if IFNET
if (sc->flags & FLAG_IFNET)
{
IFQ_PURGE(&sc->ifp->if_snd);
lmc_ifnet_detach(sc);
sc->flags &= ~FLAG_IFNET;
}
#endif
/* Reset the Tulip chip; stops DMA and Interrupts. */
shutdown_card(sc);
}
/* This is the I/O configuration interface for FreeBSD */
#ifdef __FreeBSD__
static int
fbsd_probe(device_t dev)
{
u_int32_t cfid = pci_read_config(dev, TLP_CFID, 4);
u_int32_t csid = pci_read_config(dev, TLP_CSID, 4);
/* Looking for a DEC 21140A chip on any Lan Media Corp card. */
if (cfid != TLP_CFID_TULIP) return ENXIO;
switch (csid)
{
case TLP_CSID_HSSI:
case TLP_CSID_HSSIc:
device_set_desc(dev, HSSI_DESC);
break;
case TLP_CSID_T3:
device_set_desc(dev, T3_DESC);
break;
case TLP_CSID_SSI:
device_set_desc(dev, SSI_DESC);
break;
case TLP_CSID_T1E1:
device_set_desc(dev, T1E1_DESC);
break;
default:
return ENXIO;
}
return 0;
}
static int
fbsd_detach(device_t dev)
{
softc_t *sc = device_get_softc(dev);
/* Stop the card and detach from the kernel. */
detach_card(sc);
/* Release resources. */
if (sc->irq_cookie != NULL)
{
bus_teardown_intr(dev, sc->irq_res, sc->irq_cookie);
sc->irq_cookie = NULL;
}
if (sc->irq_res != NULL)
{
bus_release_resource(dev, SYS_RES_IRQ, sc->irq_res_id, sc->irq_res);
sc->irq_res = NULL;
}
if (sc->csr_res != NULL)
{
bus_release_resource(dev, sc->csr_res_type, sc->csr_res_id, sc->csr_res);
sc->csr_res = NULL;
}
# if (__FreeBSD_version >= 500000)
mtx_destroy(&sc->top_mtx);
mtx_destroy(&sc->bottom_mtx);
# endif
return 0; /* no error */
}
static int
fbsd_shutdown(device_t dev)
{
shutdown_card(device_get_softc(dev));
return 0;
}
static int
fbsd_attach(device_t dev)
{
softc_t *sc = device_get_softc(dev);
int error;
/* READ/WRITE_PCI_CFG need this. */
sc->dev = dev;
/* What kind of card are we driving? */
switch (READ_PCI_CFG(sc, TLP_CSID))
{
case TLP_CSID_HSSI:
case TLP_CSID_HSSIc:
sc->card = &hssi_card;
break;
case TLP_CSID_T3:
sc->card = &t3_card;
break;
case TLP_CSID_SSI:
sc->card = &ssi_card;
break;
case TLP_CSID_T1E1:
sc->card = &t1_card;
break;
default:
return ENXIO;
}
sc->dev_desc = device_get_desc(dev);
/* Allocate PCI memory or IO resources to access the Tulip chip CSRs. */
# if IOREF_CSR
sc->csr_res_id = TLP_CBIO;
sc->csr_res_type = SYS_RES_IOPORT;
# else
sc->csr_res_id = TLP_CBMA;
sc->csr_res_type = SYS_RES_MEMORY;
# endif
sc->csr_res = bus_alloc_resource(dev, sc->csr_res_type, &sc->csr_res_id,
0, ~0, 1, RF_ACTIVE);
if (sc->csr_res == NULL)
{
printf("%s: bus_alloc_resource(csr) failed.\n", NAME_UNIT);
return ENXIO;
}
sc->csr_tag = rman_get_bustag(sc->csr_res);
sc->csr_handle = rman_get_bushandle(sc->csr_res);
/* Allocate PCI interrupt resources for the card. */
sc->irq_res_id = 0;
sc->irq_res = bus_alloc_resource(dev, SYS_RES_IRQ, &sc->irq_res_id,
0, ~0, 1, RF_ACTIVE | RF_SHAREABLE);
if (sc->irq_res == NULL)
{
printf("%s: bus_alloc_resource(irq) failed.\n", NAME_UNIT);
fbsd_detach(dev);
return ENXIO;
}
if ((error = bus_setup_intr(dev, sc->irq_res, INTR_TYPE_NET | INTR_MPSAFE,
NULL, bsd_interrupt, sc, &sc->irq_cookie)))
{
printf("%s: bus_setup_intr() failed; error %d\n", NAME_UNIT, error);
fbsd_detach(dev);
return error;
}
# if (__FreeBSD_version >= 500000)
/* Initialize the top-half and bottom-half locks. */
mtx_init(&sc->top_mtx, NAME_UNIT, "top half lock", MTX_DEF);
mtx_init(&sc->bottom_mtx, NAME_UNIT, "bottom half lock", MTX_DEF);
# endif
/* Start the card and attach a kernel interface and line protocol. */
if ((error = attach_card(sc, ""))) detach_card(sc);
return error;
}
static device_method_t methods[] =
{
DEVMETHOD(device_probe, fbsd_probe),
DEVMETHOD(device_attach, fbsd_attach),
DEVMETHOD(device_detach, fbsd_detach),
DEVMETHOD(device_shutdown, fbsd_shutdown),
/* This driver does not suspend and resume. */
{ 0, 0 }
};
static driver_t driver =
{
.name = DEVICE_NAME,
.methods = methods,
# if (__FreeBSD_version >= 500000)
.size = sizeof(softc_t),
# else /* FreeBSD-4 */
.softc = sizeof(softc_t),
# endif
};
static devclass_t devclass;
DRIVER_MODULE(lmc, pci, driver, devclass, 0, 0);
MODULE_VERSION(lmc, 2);
MODULE_DEPEND(lmc, pci, 1, 1, 1);
# if NETGRAPH
MODULE_DEPEND(lmc, netgraph, NG_ABI_VERSION, NG_ABI_VERSION, NG_ABI_VERSION);
# endif
# if NSPPP
MODULE_DEPEND(lmc, sppp, 1, 1, 1);
# endif
#endif /* __FreeBSD__ */
/* This is the I/O configuration interface for NetBSD. */
#ifdef __NetBSD__
static int
nbsd_match(struct device *parent, struct cfdata *match, void *aux)
{
struct pci_attach_args *pa = aux;
u_int32_t cfid = pci_conf_read(pa->pa_pc, pa->pa_tag, TLP_CFID);
u_int32_t csid = pci_conf_read(pa->pa_pc, pa->pa_tag, TLP_CSID);
/* Looking for a DEC 21140A chip on any Lan Media Corp card. */
if (cfid != TLP_CFID_TULIP) return 0;
switch (csid)
{
case TLP_CSID_HSSI:
case TLP_CSID_HSSIc:
case TLP_CSID_T3:
case TLP_CSID_SSI:
case TLP_CSID_T1E1:
return 100;
default:
return 0;
}
}
static int
nbsd_detach(struct device *self, int flags)
{
softc_t *sc = (softc_t *)self; /* device is first in softc */
/* Stop the card and detach from the kernel. */
detach_card(sc);
/* Release resources. */
if (sc->sdh_cookie != NULL)
{
shutdownhook_disestablish(sc->sdh_cookie);
sc->sdh_cookie = NULL;
}
if (sc->irq_cookie != NULL)
{
pci_intr_disestablish(sc->pa_pc, sc->irq_cookie);
sc->irq_cookie = NULL;
}
if (sc->csr_handle)
{
bus_space_unmap(sc->csr_tag, sc->csr_handle, TLP_CSR_SIZE);
sc->csr_handle = 0;
}
return 0; /* no error */
}
static void
nbsd_attach(struct device *parent, struct device *self, void *aux)
{
softc_t *sc = (softc_t *)self; /* device is first in softc */
struct pci_attach_args *pa = aux;
const char *intrstr;
bus_addr_t csr_addr;
int error;
/* READ/WRITE_PCI_CFG need these. */
sc->pa_pc = pa->pa_pc;
sc->pa_tag = pa->pa_tag;
/* bus_dma needs this. */
sc->pa_dmat = pa->pa_dmat;
/* What kind of card are we driving? */
switch (READ_PCI_CFG(sc, TLP_CSID))
{
case TLP_CSID_HSSI:
case TLP_CSID_HSSIc:
sc->dev_desc = HSSI_DESC;
sc->card = &hssi_card;
break;
case TLP_CSID_T3:
sc->dev_desc = T3_DESC;
sc->card = &t3_card;
break;
case TLP_CSID_SSI:
sc->dev_desc = SSI_DESC;
sc->card = &ssi_card;
break;
case TLP_CSID_T1E1:
sc->dev_desc = T1E1_DESC;
sc->card = &t1_card;
break;
default:
return;
}
printf(": %s\n", sc->dev_desc);
/* Allocate PCI resources to access the Tulip chip CSRs. */
# if IOREF_CSR
csr_addr = (bus_addr_t)READ_PCI_CFG(sc, TLP_CBIO) & -2;
sc->csr_tag = pa->pa_iot; /* bus_space tag for IO refs */
# else
csr_addr = (bus_addr_t)READ_PCI_CFG(sc, TLP_CBMA);
sc->csr_tag = pa->pa_memt; /* bus_space tag for MEM refs */
# endif
if ((error = bus_space_map(sc->csr_tag, csr_addr,
TLP_CSR_SIZE, 0, &sc->csr_handle)))
{
printf("%s: bus_space_map() failed; error %d\n", NAME_UNIT, error);
return;
}
/* Allocate PCI interrupt resources. */
if ((error = pci_intr_map(pa, &sc->intr_handle)))
{
printf("%s: pci_intr_map() failed; error %d\n", NAME_UNIT, error);
nbsd_detach(self, 0);
return;
}
sc->irq_cookie = pci_intr_establish(pa->pa_pc, sc->intr_handle,
IPL_NET, bsd_interrupt, sc);
if (sc->irq_cookie == NULL)
{
printf("%s: pci_intr_establish() failed\n", NAME_UNIT);
nbsd_detach(self, 0);
return;
}
intrstr = pci_intr_string(pa->pa_pc, sc->intr_handle);
/* Install a shutdown hook. */
sc->sdh_cookie = shutdownhook_establish(shutdown_card, sc);
if (sc->sdh_cookie == NULL)
{
printf("%s: shutdown_hook_establish() failed\n", NAME_UNIT);
nbsd_detach(self, 0);
return;
}
/* Initialize the top-half and bottom-half locks. */
simple_lock_init(&sc->top_lock);
simple_lock_init(&sc->bottom_lock);
/* Start the card and attach a kernel interface and line protocol. */
if ((error = attach_card(sc, intrstr))) detach_card(sc);
}
# if (__NetBSD_Version__ >= 106080000) /* 1.6H */
CFATTACH_DECL(lmc, sizeof(softc_t),
nbsd_match, nbsd_attach, nbsd_detach, NULL);
# else
struct cfattach lmc_ca =
{
/*.ca_name = DEVICE_NAME, */
.ca_devsize = sizeof(softc_t),
.ca_match = nbsd_match,
.ca_attach = nbsd_attach,
.ca_detach = nbsd_detach,
.ca_activate = NULL,
};
# endif
# if (__NetBSD_Version__ >= 106080000)
CFDRIVER_DECL(lmc, DV_IFNET, NULL);
# else
static struct cfdriver lmc_cd =
{
.cd_name = DEVICE_NAME,
.cd_class = DV_IFNET,
.cd_ndevs = 0,
.cd_devs = NULL,
};
# endif
/* cfdata is declared static, unseen outside this module. */
/* It is used for LKM; config builds its own in ioconf.c. */
static struct cfdata lmc_cf =
{
# if (__NetBSD_Version__ >= 106080000)
.cf_name = DEVICE_NAME,
.cf_atname = DEVICE_NAME,
# else
.cf_driver = &lmc_cd,
.cf_attach = &lmc_ca,
# endif
.cf_unit = 0,
.cf_fstate = FSTATE_STAR,
};
# if (__NetBSD_Version__ >= 106080000)
MOD_MISC(DEVICE_NAME)
# else
static struct lkm_misc _module =
{
.lkm_name = DEVICE_NAME,
.lkm_type = LM_MISC,
.lkm_offset = 0,
.lkm_ver = LKM_VERSION,
};
# endif
/* From /sys/dev/pci/pci.c (no public prototype). */
int pciprint(void *, const char *);
static int lkm_nbsd_match(struct pci_attach_args *pa)
{ return nbsd_match(0, 0, pa); }
/* LKM loader finds this by appending "_lkmentry" to filename "if_lmc". */
int if_lmc_lkmentry(struct lkm_table *lkmtp, int cmd, int ver)
{
int i, error = 0;
if (ver != LKM_VERSION) return EINVAL;
switch (cmd)
{
case LKM_E_LOAD:
{
struct cfdriver* pcicd;
lkmtp->private.lkm_misc = &_module;
if ((pcicd = config_cfdriver_lookup("pci")) == NULL)
{
printf("%s: config_cfdriver_lookup(pci) failed; error %d\n",
lmc_cd.cd_name, error);
return error;
}
# if (__NetBSD_Version__ >= 106080000)
if ((error = config_cfdriver_attach(&lmc_cd)))
{
printf("%s: config_cfdriver_attach() failed; error %d\n",
lmc_cd.cd_name, error);
return error;
}
if ((error = config_cfattach_attach(lmc_cd.cd_name, &lmc_ca)))
{
printf("%s: config_cfattach_attach() failed; error %d\n",
lmc_cd.cd_name, error);
config_cfdriver_detach(&lmc_cd);
return error;
}
# endif
for (i=0; i<pcicd->cd_ndevs; i++)
{
int dev;
/* A pointer to a device is a pointer to its softc. */
struct pci_softc *sc = pcicd->cd_devs[i];
if (sc == NULL) continue;
for (dev=0; dev<sc->sc_maxndevs; dev++)
{
struct pci_attach_args pa;
pcitag_t tag = pci_make_tag(sc->sc_pc, sc->sc_bus, dev, 0);
if (pci_probe_device(sc, tag, lkm_nbsd_match, &pa) != 0)
config_attach(pcicd->cd_devs[i], &lmc_cf, &pa, pciprint);
/* config_attach doesn't return on failure; it calls panic. */
}
}
break;
}
case LKM_E_UNLOAD:
{
for (i=lmc_cd.cd_ndevs-1; i>=0; i--)
{
struct device *dev = lmc_cd.cd_devs[i];
if (dev == NULL) continue;
if ((error = config_detach(dev, 0)))
{
printf("%s: config_detach() failed; error %d\n",
dev->dv_xname, error);
return error;
}
}
# if (__NetBSD_Version__ >= 106080000)
if ((error = config_cfattach_detach(lmc_cd.cd_name, &lmc_ca)))
{
printf("%s: config_cfattach_detach() failed; error %d\n",
lmc_cd.cd_name, error);
return error;
}
if ((error = config_cfdriver_detach(&lmc_cd)))
{
printf("%s: config_cfdriver_detach() failed; error %d\n",
lmc_cd.cd_name, error);
return error;
}
# endif
break;
}
case LKM_E_STAT:
break;
}
return error;
}
#endif /* __NetBSD__ */
/* This is the I/O configuration interface for OpenBSD. */
#ifdef __OpenBSD__
static int
obsd_match(struct device *parent, void *match, void *aux)
{
struct pci_attach_args *pa = aux;
u_int32_t cfid = pci_conf_read(pa->pa_pc, pa->pa_tag, TLP_CFID);
u_int32_t csid = pci_conf_read(pa->pa_pc, pa->pa_tag, TLP_CSID);
/* Looking for a DEC 21140A chip on any Lan Media Corp card. */
if (cfid != TLP_CFID_TULIP) return 0;
switch (csid)
{
case TLP_CSID_HSSI:
case TLP_CSID_HSSIc:
case TLP_CSID_T3:
case TLP_CSID_SSI:
case TLP_CSID_T1E1:
return 100; /* match better than other 21140 drivers */
default:
return 0;
}
}
static int
obsd_detach(struct device *self, int flags)
{
softc_t *sc = (softc_t *)self; /* device is first in softc */
/* Stop the card and detach from the kernel. */
detach_card(sc);
/* Release resources. */
if (sc->sdh_cookie != NULL)
{
shutdownhook_disestablish(sc->sdh_cookie);
sc->sdh_cookie = NULL;
}
if (sc->irq_cookie != NULL)
{
pci_intr_disestablish(sc->pa_pc, sc->irq_cookie);
sc->irq_cookie = NULL;
}
if (sc->csr_handle)
{
bus_space_unmap(sc->csr_tag, sc->csr_handle, TLP_CSR_SIZE);
sc->csr_handle = 0;
}
return 0; /* no error */
}
static void
obsd_attach(struct device *parent, struct device *self, void *aux)
{
softc_t *sc = (softc_t *)self; /* device is first in softc */
struct pci_attach_args *pa = aux;
const char *intrstr;
bus_addr_t csr_addr;
int error;
/* READ/WRITE_PCI_CFG need these. */
sc->pa_pc = pa->pa_pc;
sc->pa_tag = pa->pa_tag;
/* bus_dma needs this. */
sc->pa_dmat = pa->pa_dmat;
/* What kind of card are we driving? */
switch (READ_PCI_CFG(sc, TLP_CSID))
{
case TLP_CSID_HSSI:
case TLP_CSID_HSSIc:
sc->dev_desc = HSSI_DESC;
sc->card = &hssi_card;
break;
case TLP_CSID_T3:
sc->dev_desc = T3_DESC;
sc->card = &t3_card;
break;
case TLP_CSID_SSI:
sc->dev_desc = SSI_DESC;
sc->card = &ssi_card;
break;
case TLP_CSID_T1E1:
sc->dev_desc = T1E1_DESC;
sc->card = &t1_card;
break;
default:
return;
}
printf(": %s\n", sc->dev_desc);
/* Allocate PCI resources to access the Tulip chip CSRs. */
# if IOREF_CSR
csr_addr = (bus_addr_t)READ_PCI_CFG(sc, TLP_CBIO) & -2;
sc->csr_tag = pa->pa_iot; /* bus_space tag for IO refs */
# else
csr_addr = (bus_addr_t)READ_PCI_CFG(sc, TLP_CBMA);
sc->csr_tag = pa->pa_memt; /* bus_space tag for MEM refs */
# endif
if ((error = bus_space_map(sc->csr_tag, csr_addr,
TLP_CSR_SIZE, 0, &sc->csr_handle)))
{
printf("%s: bus_space_map() failed; error %d\n", NAME_UNIT, error);
return;
}
/* Allocate PCI interrupt resources. */
if ((error = pci_intr_map(pa, &sc->intr_handle)))
{
printf("%s: pci_intr_map() failed; error %d\n", NAME_UNIT, error);
obsd_detach(self, 0);
return;
}
sc->irq_cookie = pci_intr_establish(pa->pa_pc, sc->intr_handle,
IPL_NET, bsd_interrupt, sc, self->dv_xname);
if (sc->irq_cookie == NULL)
{
printf("%s: pci_intr_establish() failed\n", NAME_UNIT);
obsd_detach(self, 0);
return;
}
intrstr = pci_intr_string(pa->pa_pc, sc->intr_handle);
/* Install a shutdown hook. */
sc->sdh_cookie = shutdownhook_establish(shutdown_card, sc);
if (sc->sdh_cookie == NULL)
{
printf("%s: shutdown_hook_establish() failed\n", NAME_UNIT);
obsd_detach(self, 0);
return;
}
/* Initialize the top-half and bottom-half locks. */
simple_lock_init(&sc->top_lock);
simple_lock_init(&sc->bottom_lock);
/* Start the card and attach a kernel interface and line protocol. */
if ((error = attach_card(sc, intrstr))) detach_card(sc);
}
struct cfattach lmc_ca =
{
.ca_devsize = sizeof(softc_t),
.ca_match = obsd_match,
.ca_attach = obsd_attach,
.ca_detach = obsd_detach,
.ca_activate = NULL,
};
struct cfdriver lmc_cd =
{
.cd_name = DEVICE_NAME,
.cd_devs = NULL,
.cd_class = DV_IFNET,
.cd_indirect = 0,
.cd_ndevs = 0,
};
/* cfdata is declared static, unseen outside this module. */
/* It is used for LKM; config builds its own in ioconf.c. */
static struct cfdata lmc_cfdata =
{
.cf_attach = &lmc_ca,
.cf_driver = &lmc_cd,
.cf_unit = 0,
.cf_fstate = FSTATE_STAR,
};
static struct lkm_any _module =
{
.lkm_name = DEVICE_NAME,
.lkm_type = LM_MISC,
.lkm_offset = 0,
.lkm_ver = LKM_VERSION,
};
/* From /sys/dev/pci/pci.c (no public prototype). */
int pciprint(void *, const char *);
extern struct cfdriver pci_cd;
/* LKM loader finds this by appending "_lkmentry" to filename "if_lmc". */
int if_lmc_lkmentry(struct lkm_table *lkmtp, int cmd, int ver)
{
int i, error = 0;
if (ver != LKM_VERSION) return EINVAL;
switch (cmd)
{
case LKM_E_LOAD:
{ /* XXX This works for ONE card on pci0 of a i386 machine! XXX */
lkmtp->private.lkm_any = &_module;
for (i=0; i<pci_cd.cd_ndevs; i++)
{
struct pci_attach_args pa;
struct device *parent = pci_cd.cd_devs[i];
if (parent == NULL) continue; /* dead clone? */
if ((parent->dv_unit)!=0) continue; /* only bus zero */
/* XXX For machine independence, need: pcibus_attach_args. XXX */
/* XXX See NetBSD's sys/dev/pci/pci.c/pci_probe_device. XXX */
/* XXX Why isn't there an LKM network interface module? XXX */
pa.pa_pc = NULL; /* XXX */
pa.pa_bus = 0; /* XXX */
pa.pa_iot = X86_BUS_SPACE_IO; /* XXX */
pa.pa_memt = X86_BUS_SPACE_MEM; /* XXX */
pa.pa_dmat = &pci_bus_dma_tag; /* XXX */
for (pa.pa_device=0; pa.pa_device<32; pa.pa_device++) /* XXX */
{
int intr;
pa.pa_function = 0; /* DEC-21140A has function 0 only XXX */
pa.pa_tag = pci_make_tag(pa.pa_pc, pa.pa_bus, pa.pa_device, 0);
pa.pa_id = pci_conf_read(pa.pa_pc, pa.pa_tag, PCI_ID_REG);
if ((pa.pa_id & 0xFFFF) == 0xFFFF) continue;
if ((pa.pa_id & 0xFFFF) == 0) continue;
/* XXX this only works for pci0 -- no swizzelling XXX */
pa.pa_intrswiz = 0;
pa.pa_intrtag = pa.pa_tag;
intr = pci_conf_read(pa.pa_pc, pa.pa_tag, PCI_INTERRUPT_REG);
pa.pa_intrline = PCI_INTERRUPT_LINE(intr);
pa.pa_intrpin = ((PCI_INTERRUPT_PIN(intr) -1) % 4) +1;
if (obsd_match(parent, &lmc_cfdata, &pa))
config_attach(parent, &lmc_cfdata, &pa, pciprint);
/* config_attach doesn't return on failure; it calls panic. */
}
}
break;
}
case LKM_E_UNLOAD:
{
for (i=lmc_cd.cd_ndevs-1; i>=0; i--)
{
struct device *dev = lmc_cd.cd_devs[i];
if (dev == NULL) continue;
if ((error = config_detach(dev, 0)))
printf("%s: config_detach() failed; error %d\n", dev->dv_xname, error);
}
break;
}
case LKM_E_STAT:
break;
}
return error;
}
#endif /* __OpenBSD__ */
/* This is the I/O configuration interface for BSD/OS. */
#ifdef __bsdi__
static int
bsdi_match(pci_devaddr_t *pa)
{
u_int32_t cfid = pci_inl(pa, TLP_CFID);
u_int32_t csid = pci_inl(pa, TLP_CSID);
/* Looking for a DEC 21140A chip on any Lan Media Corp card. */
if (cfid != TLP_CFID_TULIP) return 0;
switch (csid)
{
case TLP_CSID_HSSI:
case TLP_CSID_HSSIc:
case TLP_CSID_T3:
case TLP_CSID_SSI:
case TLP_CSID_T1E1:
return 1;
default:
return 0;
}
}
static int
bsdi_probe(struct device *parent, struct cfdata *cf, void *aux)
{
struct isa_attach_args *ia = aux;
pci_devaddr_t *pa = NULL;
pci_devres_t res;
/* This must be a PCI bus. */
if (ia->ia_bustype != BUS_PCI) return 0;
/* Scan PCI bus for our boards. */
if ((pa = pci_scan(bsdi_match)) == 0) return 0;
/* Scan config space for IO and MEM base registers and IRQ info. */
pci_getres(pa, &res, 1, ia);
/* Crucial: pass pci_devaddr to bsdi_attach in ia_aux. */
ia->ia_aux = (void *)pa;
return 1;
}
static void
bsdi_attach(struct device *parent, struct device *self, void *aux)
{
softc_t *sc = (softc_t *)self; /* device is first in softc */
struct isa_attach_args *ia = aux;
pci_devaddr_t *pa = ia->ia_aux; /* this is crucial! */
int error;
/* READ/WRITE_PCI_CFG need this. */
sc->cfgbase = *pa;
/* What kind of card are we driving? */
switch (READ_PCI_CFG(sc, TLP_CSID))
{
case TLP_CSID_HSSI:
case TLP_CSID_HSSIc:
sc->dev_desc = HSSI_DESC;
sc->card = &hssi_card;
break;
case TLP_CSID_T3:
sc->dev_desc = T3_DESC;
sc->card = &t3_card;
break;
case TLP_CSID_SSI:
sc->dev_desc = SSI_DESC;
sc->card = &ssi_card;
break;
case TLP_CSID_T1E1:
sc->dev_desc = T1E1_DESC;
sc->card = &t1_card;
break;
default:
return;
}
printf(": %s\n", sc->dev_desc);
/* Allocate PCI memory or IO resources to access the Tulip chip CSRs. */
sc->csr_iobase = ia->ia_iobase;
sc->csr_membase = (u_int32_t *)mapphys((vm_offset_t)ia->ia_maddr, TLP_CSR_SIZE);
/* Attach to the PCI bus. */
isa_establish(&sc->id, &sc->dev);
/* Allocate PCI interrupt resources for the card. */
sc->ih.ih_fun = bsd_interrupt;
sc->ih.ih_arg = sc;
intr_establish(ia->ia_irq, &sc->ih, DV_NET);
/* Install a shutdown hook. */
sc->ats.func = shutdown_card;
sc->ats.arg = sc;
atshutdown(&sc->ats, ATSH_ADD);
/* Initialize the top-half and bottom-half locks. */
simple_lock_init(&sc->top_lock);
simple_lock_init(&sc->bottom_lock);
/* Start the card and attach a kernel interface and line protocol. */
if ((error = attach_card(sc, ""))) detach_card(sc);
}
struct cfdriver lmccd =
{
.cd_devs = NULL,
.cd_name = DEVICE_NAME,
.cd_match = bsdi_probe,
.cd_attach = bsdi_attach,
.cd_class = DV_IFNET,
.cd_devsize = sizeof(softc_t),
};
#endif /* __bsdi__ */
#ifdef __linux__
/* The kernel calls this procedure when an interrupt happens. */
static irqreturn_t
linux_interrupt(int irq, void *dev, struct pt_regs *regs)
{
struct net_device *net_dev = dev;
softc_t *sc = dev_to_hdlc(net_dev)->priv;
/* Cut losses early if this is not our interrupt. */
if ((READ_CSR(TLP_STATUS) & TLP_INT_TXRX) == 0)
return IRQ_NONE;
/* Disable card interrupts. */
WRITE_CSR(TLP_INT_ENBL, TLP_INT_DISABLE);
/* Handle the card interrupt with the dev->poll method. */
if (netif_rx_schedule_prep(net_dev))
__netif_rx_schedule(net_dev); /* NAPI - add to poll list */
else
printk("%s: interrupt while on poll list\n", NAME_UNIT);
return IRQ_HANDLED;
}
/* This net_device method services interrupts in a softirq. */
/* With rxintr_cleanup(), it implements input flow control. */
static int
linux_poll(struct net_device *net_dev, int *budget)
{
softc_t *sc = dev_to_hdlc(net_dev)->priv;
int received;
/* Yes, we do NAPI. */
/* Allow processing up to net_dev->quota incoming packets. */
/* This is the ONLY time core_interrupt() may process rx pkts. */
/* Otherwise (sc->quota == 0) and rxintr_cleanup() is a NOOP. */
sc->quota = net_dev->quota;
/* Handle the card interrupt with kernel ints enabled. */
/* Process rx pkts (and tx pkts, too). */
/* Card interrupts are disabled. */
core_interrupt(sc, 0);
/* Report number of rx packets processed. */
received = net_dev->quota - sc->quota;
net_dev->quota -= received;
*budget -= received;
/* if quota prevented processing all rx pkts, leave rx ints disabled */
if (sc->quota == 0) /* this is off by one...but harmless */
{
WRITE_CSR(TLP_INT_ENBL, TLP_INT_TX);
return 1; /* more pkts to handle -- reschedule */
}
sc->quota = 0; /* disable rx pkt processing by rxintr_cleanup() */
netif_rx_complete(net_dev); /* NAPI - remove from poll list */
/* Enable card interrupts. */
WRITE_CSR(TLP_INT_ENBL, TLP_INT_TXRX);
return 0;
}
/* These next routines are similar to BSD's ifnet kernel/driver interface. */
/* This net_device method hands outgoing packets to the transmitter. */
/* With txintr_setup(), it implements output flow control. */
/* Called from a syscall (user context; no spinlocks). */
static int
linux_start(struct sk_buff *skb, struct net_device *net_dev)
{
softc_t *sc = dev_to_hdlc(net_dev)->priv;
if (sc->tx_skb == NULL)
{
/* Put this skb where the transmitter will see it. */
sc->tx_skb = skb;
/* Start the transmitter; incoming pkts are NOT processed. */
user_interrupt(sc, 0);
/* If the tx didn't take the skb then stop the queue. */
/* This can happen if another CPU is in core_interrupt(). */
if (sc->tx_skb != NULL) netif_stop_queue(net_dev);
return 0;
}
/* This shouldn't happen; skb is NOT consumed. */
if (netif_queue_stopped(net_dev))
printk("%s: dev->start() called with queue stopped\n", NAME_UNIT);
else
netif_stop_queue(net_dev);
return 1;
}
/* This net_device method restarts the transmitter if it hangs. */
/* Called from a softirq. */
static void
linux_timeout(struct net_device *net_dev)
{
softc_t *sc = dev_to_hdlc(net_dev)->priv;
/* Start the transmitter; incoming packets are NOT processed. */
user_interrupt(sc, 1);
}
/* This net_device method handles IOCTL syscalls. */
/* Called from a syscall (user context; no spinlocks; can sleep). */
static int
linux_ioctl(struct net_device *net_dev, struct ifreq *ifr, int cmd)
{
softc_t *sc = dev_to_hdlc(net_dev)->priv;
int error = 0;
if ((cmd >= SIOCDEVPRIVATE) && (cmd <= SIOCDEVPRIVATE+15))
{
struct iohdr *iohdr = (struct iohdr *)ifr;
u_int16_t direction = iohdr->direction;
u_int16_t length = iohdr->length;
char *user_addr = (char *)iohdr->iohdr;
char *kern_addr;
if (iohdr->cookie != NGM_LMC_COOKIE) return -EINVAL;
/* Emulate a BSD-style IOCTL syscall. */
kern_addr = kmalloc(length, GFP_KERNEL);
if (kern_addr == NULL)
error = -ENOMEM;
if ((error == 0) && ((direction & DIR_IOW) != 0))
error = copy_from_user(kern_addr, user_addr, length);
if (error == 0)
error = -core_ioctl(sc, (unsigned long)cmd, kern_addr);
if ((error == 0) && ((direction & DIR_IOR) != 0))
error = copy_to_user(user_addr, kern_addr, length);
kfree(kern_addr);
}
# if GEN_HDLC
else if (cmd == SIOCWANDEV)
{
const size_t size = sizeof(sync_serial_settings);
switch (ifr->ifr_settings.type)
{
case IF_GET_IFACE: /* get interface config */
{
ifr->ifr_settings.type = IF_IFACE_SYNC_SERIAL;
if (ifr->ifr_settings.size < size)
{
ifr->ifr_settings.size = size;
error = -ENOBUFS;
}
else
{
if (sc->config.tx_clk_src == CFG_CLKMUX_ST)
sc->hdlc_settings.clock_type = CLOCK_EXT;
if (sc->config.tx_clk_src == CFG_CLKMUX_INT)
sc->hdlc_settings.clock_type = CLOCK_TXINT;
if (sc->config.tx_clk_src == CFG_CLKMUX_RT)
sc->hdlc_settings.clock_type = CLOCK_TXFROMRX;
sc->hdlc_settings.loopback = (sc->config.loop_back != CFG_LOOP_NONE) ? 1:0;
sc->hdlc_settings.clock_rate = sc->status.tx_speed;
error = copy_to_user(ifr->ifr_settings.ifs_ifsu.sync,
&sc->hdlc_settings, size);
}
break;
}
case IF_IFACE_SYNC_SERIAL: /* set interface config */
{
if (!capable(CAP_NET_ADMIN))
error = -EPERM;
if (error == 0)
error = copy_from_user(&sc->hdlc_settings,
ifr->ifr_settings.ifs_ifsu.sync, size);
/* hdlc_settings are currently ignored. */
break;
}
default: /* Pass the rest to the line protocol code. */
{
error = hdlc_ioctl(net_dev, ifr, cmd);
break;
}
}
}
# endif /* GEN_HDLC */
else /* unknown IOCTL command */
error = -EINVAL;
if (DRIVER_DEBUG)
printk("%s: linux_ioctl; cmd=0x%08x error=%d\n",
NAME_UNIT, cmd, error);
return error;
}
/* This net_device method returns a pointer to device statistics. */
static struct net_device_stats *
linux_stats(struct net_device *net_dev)
{
# if GEN_HDLC
return &dev_to_hdlc(net_dev)->stats;
# else
softc_t *sc = net_dev->priv;
return &sc->net_stats;
# endif
}
/* Called from a softirq once a second. */
static void
linux_watchdog(unsigned long softc)
{
softc_t *sc = (softc_t *)softc;
u_int8_t old_oper_status = sc->status.oper_status;
struct event_cntrs *cntrs = &sc->status.cntrs;
struct net_device_stats *stats = linux_stats(sc->net_dev);
core_watchdog(sc); /* updates oper_status */
/* Notice change in link status. */
if ((old_oper_status != STATUS_UP) &&
(sc->status.oper_status == STATUS_UP)) /* link came up */
{
hdlc_set_carrier(1, sc->net_dev);
netif_wake_queue(sc->net_dev);
}
if ((old_oper_status == STATUS_UP) &&
(sc->status.oper_status != STATUS_UP)) /* link went down */
{
hdlc_set_carrier(0, sc->net_dev);
netif_stop_queue(sc->net_dev);
}
/* Notice change in line protocol. */
if (sc->config.line_pkg == PKG_RAWIP)
{
sc->status.line_pkg = PKG_RAWIP;
sc->status.line_prot = PROT_IP_HDLC;
}
# if GEN_HDLC
else
{
sc->status.line_pkg = PKG_GEN_HDLC;
switch (sc->hdlc_dev->proto.id)
{
case IF_PROTO_PPP:
sc->status.line_prot = PROT_PPP;
break;
case IF_PROTO_CISCO:
sc->status.line_prot = PROT_C_HDLC;
break;
case IF_PROTO_FR:
sc->status.line_prot = PROT_FRM_RLY;
break;
case IF_PROTO_HDLC:
sc->status.line_prot = PROT_IP_HDLC;
break;
case IF_PROTO_X25:
sc->status.line_prot = PROT_X25;
break;
case IF_PROTO_HDLC_ETH:
sc->status.line_prot = PROT_ETH_HDLC;
break;
default:
sc->status.line_prot = 0;
break;
}
}
# endif /* GEN_HDLC */
/* Copy statistics from sc to net_dev for get_stats(). */
stats->rx_packets = cntrs->ipackets;
stats->tx_packets = cntrs->opackets;
stats->rx_bytes = cntrs->ibytes;
stats->tx_bytes = cntrs->obytes;
stats->rx_errors = cntrs->ierrors;
stats->tx_errors = cntrs->oerrors;
stats->rx_dropped = cntrs->idiscards;
stats->tx_dropped = cntrs->odiscards;
stats->rx_fifo_errors = cntrs->fifo_over;
stats->tx_fifo_errors = cntrs->fifo_under;
stats->rx_missed_errors = cntrs->missed;
stats->rx_over_errors = cntrs->overruns;
/* Call this procedure again after one second. */
sc->wd_timer.expires = jiffies + HZ; /* now plus one second */
add_timer(&sc->wd_timer);
}
/* This is the I/O configuration interface for Linux. */
/* This net_device method is called when IFF_UP goes false. */
static int
linux_stop(struct net_device *net_dev)
{
softc_t *sc = dev_to_hdlc(net_dev)->priv;
/* Stop the card and detach from the kernel. */
detach_card(sc); /* doesn't fail */
free_irq(net_dev->irq, net_dev); /* doesn't fail */
del_timer(&sc->wd_timer); /* return value ignored */
return 0;
}
/* This net_device method is called when IFF_UP goes true. */
static int
linux_open(struct net_device *net_dev)
{
softc_t *sc = dev_to_hdlc(net_dev)->priv;
int error;
/* Allocate PCI interrupt resources for the card. */
if ((error = request_irq(net_dev->irq, &linux_interrupt, SA_SHIRQ,
NAME_UNIT, net_dev)))
{
printk("%s: request_irq() failed; error %d\n", NAME_UNIT, error);
return error;
}
/* Arrange to call linux_watchdog() once a second. */
init_timer(&sc->wd_timer);
sc->wd_timer.expires = jiffies + HZ; /* now plus one second */
sc->wd_timer.function = &linux_watchdog;
sc->wd_timer.data = (unsigned long) sc;
add_timer(&sc->wd_timer);
/* Start the card and attach a kernel interface and line protocol. */
if ((error = -attach_card(sc, "")))
linux_stop(net_dev);
else
{
net_dev->weight = sc->rxring.num_descs; /* input flow control */
netif_start_queue(net_dev); /* output flow control */
}
return error;
}
# if GEN_HDLC
static int
hdlc_attach(struct net_device *net_dev,
unsigned short encoding, unsigned short parity)
{ return 0; }
# endif
/* This pci_driver method is called during shutdown or module-unload. */
/* This is called from user context; can sleep; no spinlocks! */
static void __exit
linux_remove(struct pci_dev *pci_dev)
{
struct net_device *net_dev = (struct net_device *)pci_get_drvdata(pci_dev);
softc_t *sc = dev_to_hdlc(net_dev)->priv;
if (net_dev == NULL) return;
/* Assume that linux_stop() has already been called. */
if (sc->flags & FLAG_NETDEV)
# if GEN_HDLC
unregister_hdlc_device(net_dev);
# else
unregister_netdev(net_dev);
# endif
# if (IOREF_CSR == 0)
if (sc->csr_membase != NULL)
iounmap(sc->csr_membase);
# endif
pci_disable_device(pci_dev);
if (sc->csr_iobase != 0)
pci_release_regions(pci_dev);
pci_set_drvdata(pci_dev, NULL);
kfree(sc);
free_netdev(net_dev);
}
static void
setup_netdev(struct net_device *net_dev)
{
/* Initialize the generic network device. */
/* Note similarity to BSD's lmc_ifnet_attach(). */
net_dev->flags = IFF_POINTOPOINT;
net_dev->flags |= IFF_RUNNING;
net_dev->open = linux_open;
net_dev->stop = linux_stop;
net_dev->hard_start_xmit = linux_start;
net_dev->do_ioctl = linux_ioctl;
net_dev->get_stats = linux_stats;
net_dev->tx_timeout = linux_timeout;
net_dev->poll = linux_poll;
net_dev->watchdog_timeo = 1 * HZ;
net_dev->tx_queue_len = SNDQ_MAXLEN;
net_dev->mtu = MAX_DESC_LEN;
net_dev->type = ARPHRD_RAWHDLC;
/* The receiver generates frag-lists for packets >4032 bytes. */
/* The transmitter accepts scatter/gather lists and frag-lists. */
/* However Linux linearizes outgoing packets since our hardware */
/* doesn't compute soft checksums. All that work for nothing! */
/*net_dev->features |= NETIF_F_SG; */
/*net_dev->features |= NETIF_F_FRAGLIST; */
}
/* This pci_driver method is called during boot or module-load. */
/* This is called from user context; can sleep; no spinlocks! */
static int __init
linux_probe(struct pci_dev *pci_dev, const struct pci_device_id *id)
{
u_int32_t cfid, csid;
struct net_device *net_dev;
softc_t *sc;
int error;
/* Looking for a DEC 21140A chip on any Lan Media Corp card. */
pci_read_config_dword(pci_dev, TLP_CFID, &cfid);
if (cfid != TLP_CFID_TULIP) return -ENXIO;
pci_read_config_dword(pci_dev, TLP_CSID, &csid);
switch (csid)
{
case TLP_CSID_HSSI:
case TLP_CSID_HSSIc:
case TLP_CSID_T3:
case TLP_CSID_SSI:
case TLP_CSID_T1E1:
break;
default:
return -ENXIO;
}
/* Declare that these cards use 32-bit single-address PCI cycles. */
if ((error = pci_set_dma_mask(pci_dev, DMA_32BIT_MASK)))
{
printk("%s: pci_set_dma_mask() failed; error %d\n", DEVICE_NAME, error);
return error;
}
pci_set_consistent_dma_mask(pci_dev, DMA_32BIT_MASK); /* can't fail */
# if GEN_HDLC /* generic-hdlc line protocols */
/* device driver instance data, aka Soft Context or sc */
if ((sc = kmalloc(sizeof(softc_t), GFP_KERNEL)) == NULL)
{
printk("%s: kmalloc() failed\n", DEVICE_NAME);
return -ENOMEM;
}
memset(sc, 0, sizeof(softc_t));
/* Allocate space for the HDLC network device struct. */
if ((net_dev = alloc_hdlcdev(sc)) == NULL)
{
printk("%s: alloc_hdlcdev() failed\n", DEVICE_NAME);
kfree(sc);
return -ENOMEM;
}
/* Initialize the network device struct. */
setup_netdev(net_dev);
/* Initialize the HDLC extension to the network device. */
sc->hdlc_dev = dev_to_hdlc(net_dev);
sc->hdlc_dev->attach = hdlc_attach; /* noop for this driver */
sc->hdlc_dev->xmit = linux_start; /* the REAL hard_start_xmit() */
# else /* GEN_HDLC */ /* no line protocol. */
/* Allocate space for the bare network device struct. */
net_dev = alloc_netdev(sizeof(softc_t), DEVICE_NAME"%d", setup_netdev);
if (net_dev == NULL)
{
printk("%s: alloc_netdev() failed\n", DEVICE_NAME);
return -ENOMEM;
}
/* device driver instance data, aka Soft Context or sc */
sc = net_dev->priv;
# endif /* GEN_HDLC */
sc->net_dev = net_dev; /* NAME_UNIT macro needs this */
sc->pci_dev = pci_dev; /* READ/WRITE_PCI_CFG macros need this */
/* Cross-link pci_dev and net_dev. */
pci_set_drvdata(pci_dev, net_dev); /* pci_dev->driver_data = net_dev */
SET_NETDEV_DEV(net_dev, &pci_dev->dev); /* net_dev->class_dev.dev = &pci_dev->dev */
SET_MODULE_OWNER(net_dev); /* ??? NOOP in linux-2.6.3. ??? */
/* Sets cfcs.io and cfcs.mem; sets pci_dev->irq based on cfit.int */
if ((error = pci_enable_device(pci_dev)))
{
printk("%s: pci_enable_device() failed; error %d\n", DEVICE_NAME, error);
linux_remove(pci_dev);
return error;
}
net_dev->irq = pci_dev->irq; /* linux_open/stop need this */
/* Allocate PCI memory and IO resources to access the Tulip chip CSRs. */
if ((error = pci_request_regions(pci_dev, DEVICE_NAME)))
{
printk("%s: pci_request_regions() failed; error %d\n", DEVICE_NAME, error);
linux_remove(pci_dev);
return error;
}
net_dev->base_addr = pci_resource_start(pci_dev, 0);
net_dev->mem_start = pci_resource_start(pci_dev, 1);
net_dev->mem_end = pci_resource_end(pci_dev, 1);
sc->csr_iobase = net_dev->base_addr;
# if (IOREF_CSR == 0)
sc->csr_membase = ioremap_nocache(net_dev->mem_start, TLP_CSR_SIZE);
if (sc->csr_membase == NULL)
{
printk("%s: ioremap_nocache() failed\n", DEVICE_NAME);
linux_remove(pci_dev);
return -EFAULT;
}
# endif
/* Sets cfcs.master, enabling PCI DMA; checks latency timer value. */
pci_set_master(pci_dev); /* Later, attach_card() does this too. */
/* Initialize the top-half and bottom-half locks. */
/* Top_lock must be initialized before net_dev is registered. */
init_MUTEX(&sc->top_lock);
spin_lock_init(&sc->bottom_lock);
# if GEN_HDLC
if ((error = register_hdlc_device(net_dev)))
{
printk("%s: register_hdlc_device() failed; error %d\n", DEVICE_NAME, error);
linux_remove(pci_dev);
return error;
}
# else
if ((error = register_netdev(net_dev)))
{
printk("%s: register_netdev() failed; error %d\n", DEVICE_NAME, error);
linux_remove(pci_dev);
return error;
}
# endif
/* The NAME_UNIT macro now works. Use DEVICE_NAME before this. */
sc->flags |= FLAG_NETDEV;
/* What kind of card are we driving? */
switch (READ_PCI_CFG(sc, TLP_CSID))
{
case TLP_CSID_HSSI:
case TLP_CSID_HSSIc:
sc->dev_desc = HSSI_DESC;
sc->card = &hssi_card;
break;
case TLP_CSID_T3:
sc->dev_desc = T3_DESC;
sc->card = &t3_card;
break;
case TLP_CSID_SSI:
sc->dev_desc = SSI_DESC;
sc->card = &ssi_card;
break;
case TLP_CSID_T1E1:
sc->dev_desc = T1E1_DESC;
sc->card = &t1_card;
break;
default: /* shouldn't happen! */
linux_remove(pci_dev);
return -ENXIO;
}
/* Announce the hardware on the console. */
printk("%s: <%s> io 0x%04lx/9 mem 0x%08lx/25 rom 0x%08lx/14 irq %d pci %s\n",
NAME_UNIT, sc->dev_desc, pci_resource_start(pci_dev, 0),
pci_resource_start(pci_dev, 1), pci_resource_start(pci_dev, 6),
pci_dev->irq, pci_name(pci_dev));
return 0;
}
/* This pci driver knows how to drive these devices: */
static __initdata struct pci_device_id pci_device_id_tbl[] =
{
/* Looking for a DEC 21140A chip on any Lan Media Corp card. */
{ 0x1011, 0x0009, 0x1376, PCI_ANY_ID, 0, 0, 0 },
{ 0, 0, 0, 0, 0, 0, 0 }
};
MODULE_DEVICE_TABLE(pci, pci_device_id_tbl);
static struct pci_driver pci_driver =
{
.name = DEVICE_NAME,
.id_table = pci_device_id_tbl,
.probe = linux_probe,
.remove = __devexit_p(linux_remove),
/* This driver does not suspend and resume. */
};
/* This ultimately calls our pci_driver.probe() method. */
static int __init linux_modload(void)
{ return pci_module_init(&pci_driver); }
module_init(linux_modload);
/* This ultimately calls our pci_driver.remove() method. */
static void __exit linux_modunload(void)
{ pci_unregister_driver(&pci_driver); }
module_exit(linux_modunload);
MODULE_LICENSE("Dual BSD/GPL");
MODULE_DESCRIPTION("Device driver for SBE/LMC Wide-Area Network cards");
MODULE_AUTHOR("David Boggs <boggs@boggs.palo-alto.ca.us>");
#endif /* __linux__ */
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