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freebsd-skq/sys/pci/if_tl.c
wpaul 5f1b9ebf18 Increase the size of the tx and rx rings from 10 to 20 descriptors 
and increase the tx interrupt threshold to 4. This fixes performance
problems on slower systems.

Also fix a mind-o in the rx ring init routine: I used the TX
constant instead of the RX. This isn't a problem as long as the
rings are the same size, but if they aren't hijinx will ensue.
1998-10-31 17:23:48 +00:00

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/*
* Copyright (c) 1997, 1998
* Bill Paul <wpaul@ctr.columbia.edu>. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Bill Paul.
* 4. Neither the name of the author nor the names of any co-contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY Bill Paul 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 Bill Paul OR THE VOICES IN HIS HEAD
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
* THE POSSIBILITY OF SUCH DAMAGE.
*
* $Id: if_tl.c,v 1.18 1998/10/08 15:45:36 wpaul Exp $
*/
/*
* Texas Instruments ThunderLAN driver for FreeBSD 2.2.6 and 3.x.
* Supports many Compaq PCI NICs based on the ThunderLAN ethernet controller,
* the National Semiconductor DP83840A physical interface and the
* Microchip Technology 24Cxx series serial EEPROM.
*
* Written using the following four documents:
*
* Texas Instruments ThunderLAN Programmer's Guide (www.ti.com)
* National Semiconductor DP83840A data sheet (www.national.com)
* Microchip Technology 24C02C data sheet (www.microchip.com)
* Micro Linear ML6692 100BaseTX only PHY data sheet (www.microlinear.com)
*
* Written by Bill Paul <wpaul@ctr.columbia.edu>
* Electrical Engineering Department
* Columbia University, New York City
*/
/*
* Some notes about the ThunderLAN:
*
* The ThunderLAN controller is a single chip containing PCI controller
* logic, approximately 3K of on-board SRAM, a LAN controller, and media
* independent interface (MII) bus. The MII allows the ThunderLAN chip to
* control up to 32 different physical interfaces (PHYs). The ThunderLAN
* also has a built-in 10baseT PHY, allowing a single ThunderLAN controller
* to act as a complete ethernet interface.
*
* Other PHYs may be attached to the ThunderLAN; the Compaq 10/100 cards
* use a National Semiconductor DP83840A PHY that supports 10 or 100Mb/sec
* in full or half duplex. Some of the Compaq Deskpro machines use a
* Level 1 LXT970 PHY with the same capabilities. Certain Olicom adapters
* use a Micro Linear ML6692 100BaseTX only PHY, which can be used in
* concert with the ThunderLAN's internal PHY to provide full 10/100
* support. This is cheaper than using a standalone external PHY for both
* 10/100 modes and letting the ThunderLAN's internal PHY go to waste.
* A serial EEPROM is also attached to the ThunderLAN chip to provide
* power-up default register settings and for storing the adapter's
* station address. Although not supported by this driver, the ThunderLAN
* chip can also be connected to token ring PHYs.
*
* The ThunderLAN has a set of registers which can be used to issue
* commands, acknowledge interrupts, and to manipulate other internal
* registers on its DIO bus. The primary registers can be accessed
* using either programmed I/O (inb/outb) or via PCI memory mapping,
* depending on how the card is configured during the PCI probing
* phase. It is even possible to have both PIO and memory mapped
* access turned on at the same time.
*
* Frame reception and transmission with the ThunderLAN chip is done
* using frame 'lists.' A list structure looks more or less like this:
*
* struct tl_frag {
* u_int32_t fragment_address;
* u_int32_t fragment_size;
* };
* struct tl_list {
* u_int32_t forward_pointer;
* u_int16_t cstat;
* u_int16_t frame_size;
* struct tl_frag fragments[10];
* };
*
* The forward pointer in the list header can be either a 0 or the address
* of another list, which allows several lists to be linked together. Each
* list contains up to 10 fragment descriptors. This means the chip allows
* ethernet frames to be broken up into up to 10 chunks for transfer to
* and from the SRAM. Note that the forward pointer and fragment buffer
* addresses are physical memory addresses, not virtual. Note also that
* a single ethernet frame can not span lists: if the host wants to
* transmit a frame and the frame data is split up over more than 10
* buffers, the frame has to collapsed before it can be transmitted.
*
* To receive frames, the driver sets up a number of lists and populates
* the fragment descriptors, then it sends an RX GO command to the chip.
* When a frame is received, the chip will DMA it into the memory regions
* specified by the fragment descriptors and then trigger an RX 'end of
* frame interrupt' when done. The driver may choose to use only one
* fragment per list; this may result is slighltly less efficient use
* of memory in exchange for improving performance.
*
* To transmit frames, the driver again sets up lists and fragment
* descriptors, only this time the buffers contain frame data that
* is to be DMA'ed into the chip instead of out of it. Once the chip
* has transfered the data into its on-board SRAM, it will trigger a
* TX 'end of frame' interrupt. It will also generate an 'end of channel'
* interrupt when it reaches the end of the list.
*/
/*
* Some notes about this driver:
*
* The ThunderLAN chip provides a couple of different ways to organize
* reception, transmission and interrupt handling. The simplest approach
* is to use one list each for transmission and reception. In this mode,
* the ThunderLAN will generate two interrupts for every received frame
* (one RX EOF and one RX EOC) and two for each transmitted frame (one
* TX EOF and one TX EOC). This may make the driver simpler but it hurts
* performance to have to handle so many interrupts.
*
* Initially I wanted to create a circular list of receive buffers so
* that the ThunderLAN chip would think there was an infinitely long
* receive channel and never deliver an RXEOC interrupt. However this
* doesn't work correctly under heavy load: while the manual says the
* chip will trigger an RXEOF interrupt each time a frame is copied into
* memory, you can't count on the chip waiting around for you to acknowledge
* the interrupt before it starts trying to DMA the next frame. The result
* is that the chip might traverse the entire circular list and then wrap
* around before you have a chance to do anything about it. Consequently,
* the receive list is terminated (with a 0 in the forward pointer in the
* last element). Each time an RXEOF interrupt arrives, the used list
* is shifted to the end of the list. This gives the appearance of an
* infinitely large RX chain so long as the driver doesn't fall behind
* the chip and allow all of the lists to be filled up.
*
* If all the lists are filled, the adapter will deliver an RX 'end of
* channel' interrupt when it hits the 0 forward pointer at the end of
* the chain. The RXEOC handler then cleans out the RX chain and resets
* the list head pointer in the ch_parm register and restarts the receiver.
*
* For frame transmission, it is possible to program the ThunderLAN's
* transmit interrupt threshold so that the chip can acknowledge multiple
* lists with only a single TX EOF interrupt. This allows the driver to
* queue several frames in one shot, and only have to handle a total
* two interrupts (one TX EOF and one TX EOC) no matter how many frames
* are transmitted. Frame transmission is done directly out of the
* mbufs passed to the tl_start() routine via the interface send queue.
* The driver simply sets up the fragment descriptors in the transmit
* lists to point to the mbuf data regions and sends a TX GO command.
*
* Note that since the RX and TX lists themselves are always used
* only by the driver, the are malloc()ed once at driver initialization
* time and never free()ed.
*
* Also, in order to remain as platform independent as possible, this
* driver uses memory mapped register access to manipulate the card
* as opposed to programmed I/O. This avoids the use of the inb/outb
* (and related) instructions which are specific to the i386 platform.
*
* Using these techniques, this driver achieves very high performance
* by minimizing the amount of interrupts generated during large
* transfers and by completely avoiding buffer copies. Frame transfer
* to and from the ThunderLAN chip is performed entirely by the chip
* itself thereby reducing the load on the host CPU.
*/
#include "bpfilter.h"
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/sockio.h>
#include <sys/mbuf.h>
#include <sys/malloc.h>
#include <sys/kernel.h>
#include <sys/socket.h>
#include <net/if.h>
#include <net/if_arp.h>
#include <net/ethernet.h>
#include <net/if_dl.h>
#include <net/if_media.h>
#if NBPFILTER > 0
#include <net/bpf.h>
#endif
#include <vm/vm.h> /* for vtophys */
#include <vm/pmap.h> /* for vtophys */
#include <machine/clock.h> /* for DELAY */
#include <pci/pcireg.h>
#include <pci/pcivar.h>
/*
* Default to using PIO register access mode to pacify certain
* laptop docking stations with built-in ThunderLAN chips that
* don't seem to handle memory mapped mode properly.
*/
#define TL_USEIOSPACE
/* #define TL_BACKGROUND_AUTONEG */
#include <pci/if_tlreg.h>
#ifndef lint
static char rcsid[] =
"$Id: if_tl.c,v 1.18 1998/10/08 15:45:36 wpaul Exp $";
#endif
#ifdef TL_DEBUG
#define EV_TXEOC 2
#define EV_TXEOF 3
#define EV_RXEOC 4
#define EV_RXEOF 5
#define EV_START_TX 6
#define EV_START_Q 7
#define EV_SETMODE 8
#define EV_AUTONEG_XMIT 9
#define EV_AUTONEG_FIN 10
#define EV_START_TX_REAL 11
#define EV_WATCHDOG 12
#define EV_INIT 13
static void evset(sc, e)
struct tl_softc *sc;
int e;
{
int i;
for (i = 19; i > 0; i--)
sc->tl_event[i] = sc->tl_event[i - 1];
sc->tl_event[0] = e;
return;
}
static void evshow(sc)
struct tl_softc *sc;
{
int i;
printf("tl%d: events: ", sc->tl_unit);
for (i = 0; i < 20; i++)
printf(" %d", sc->tl_event[i]);
printf("\n");
return;
}
#endif
/*
* Various supported device vendors/types and their names.
*/
static struct tl_type tl_devs[] = {
{ TI_VENDORID, TI_DEVICEID_THUNDERLAN,
"Texas Instruments ThunderLAN" },
{ COMPAQ_VENDORID, COMPAQ_DEVICEID_NETEL_10,
"Compaq Netelligent 10" },
{ COMPAQ_VENDORID, COMPAQ_DEVICEID_NETEL_10_100,
"Compaq Netelligent 10/100" },
{ COMPAQ_VENDORID, COMPAQ_DEVICEID_NETEL_10_100_PROLIANT,
"Compaq Netelligent 10/100 Proliant" },
{ COMPAQ_VENDORID, COMPAQ_DEVICEID_NETEL_10_100_DUAL,
"Compaq Netelligent 10/100 Dual Port" },
{ COMPAQ_VENDORID, COMPAQ_DEVICEID_NETFLEX_3P_INTEGRATED,
"Compaq NetFlex-3/P Integrated" },
{ COMPAQ_VENDORID, COMPAQ_DEVICEID_NETFLEX_3P,
"Compaq NetFlex-3/P" },
{ COMPAQ_VENDORID, COMPAQ_DEVICEID_NETFLEX_3P_BNC,
"Compaq NetFlex 3/P w/ BNC" },
{ COMPAQ_VENDORID, COMPAQ_DEVICEID_NETEL_10_100_EMBEDDED,
"Compaq Netelligent 10/100 TX Embedded UTP" },
{ COMPAQ_VENDORID, COMPAQ_DEVICEID_NETEL_10_T2_UTP_COAX,
"Compaq Netelligent 10 T/2 PCI UTP/Coax" },
{ COMPAQ_VENDORID, COMPAQ_DEVICEID_NETEL_10_100_TX_UTP,
"Compaq Netelligent 10/100 TX UTP" },
{ OLICOM_VENDORID, OLICOM_DEVICEID_OC2183,
"Olicom OC-2183/2185" },
{ OLICOM_VENDORID, OLICOM_DEVICEID_OC2325,
"Olicom OC-2325" },
{ OLICOM_VENDORID, OLICOM_DEVICEID_OC2326,
"Olicom OC-2326 10/100 TX UTP" },
{ 0, 0, NULL }
};
/*
* Various supported PHY vendors/types and their names. Note that
* this driver will work with pretty much any MII-compliant PHY,
* so failure to positively identify the chip is not a fatal error.
*/
static struct tl_type tl_phys[] = {
{ TI_PHY_VENDORID, TI_PHY_10BT, "<TI ThunderLAN 10BT (internal)>" },
{ TI_PHY_VENDORID, TI_PHY_100VGPMI, "<TI TNETE211 100VG Any-LAN>" },
{ NS_PHY_VENDORID, NS_PHY_83840A, "<National Semiconductor DP83840A>"},
{ LEVEL1_PHY_VENDORID, LEVEL1_PHY_LXT970, "<Level 1 LXT970>" },
{ INTEL_PHY_VENDORID, INTEL_PHY_82555, "<Intel 82555>" },
{ SEEQ_PHY_VENDORID, SEEQ_PHY_80220, "<SEEQ 80220>" },
{ 0, 0, "<MII-compliant physical interface>" }
};
static unsigned long tl_count;
static char *tl_probe __P((pcici_t, pcidi_t));
static void tl_attach __P((pcici_t, int));
static int tl_attach_phy __P((struct tl_softc *));
static int tl_intvec_rxeoc __P((void *, u_int32_t));
static int tl_intvec_txeoc __P((void *, u_int32_t));
static int tl_intvec_txeof __P((void *, u_int32_t));
static int tl_intvec_rxeof __P((void *, u_int32_t));
static int tl_intvec_adchk __P((void *, u_int32_t));
static int tl_intvec_netsts __P((void *, u_int32_t));
static int tl_newbuf __P((struct tl_softc *,
struct tl_chain_onefrag *));
static void tl_stats_update __P((void *));
static int tl_encap __P((struct tl_softc *, struct tl_chain *,
struct mbuf *));
static void tl_intr __P((void *));
static void tl_start __P((struct ifnet *));
static int tl_ioctl __P((struct ifnet *, u_long, caddr_t));
static void tl_init __P((void *));
static void tl_stop __P((struct tl_softc *));
static void tl_watchdog __P((struct ifnet *));
static void tl_shutdown __P((int, void *));
static int tl_ifmedia_upd __P((struct ifnet *));
static void tl_ifmedia_sts __P((struct ifnet *, struct ifmediareq *));
static u_int8_t tl_eeprom_putbyte __P((struct tl_softc *, u_int8_t));
static u_int8_t tl_eeprom_getbyte __P((struct tl_softc *,
u_int8_t, u_int8_t *));
static int tl_read_eeprom __P((struct tl_softc *, caddr_t, int, int));
static void tl_mii_sync __P((struct tl_softc *));
static void tl_mii_send __P((struct tl_softc *, u_int32_t, int));
static int tl_mii_readreg __P((struct tl_softc *, struct tl_mii_frame *));
static int tl_mii_writereg __P((struct tl_softc *, struct tl_mii_frame *));
static u_int16_t tl_phy_readreg __P((struct tl_softc *, int));
static void tl_phy_writereg __P((struct tl_softc *, u_int16_t, u_int16_t));
static void tl_autoneg __P((struct tl_softc *, int, int));
static void tl_setmode __P((struct tl_softc *, int));
static int tl_calchash __P((unsigned char *));
static void tl_setmulti __P((struct tl_softc *));
static void tl_setfilt __P((struct tl_softc *, u_int8_t *, int));
static void tl_softreset __P((struct tl_softc *, int));
static void tl_hardreset __P((struct tl_softc *));
static int tl_list_rx_init __P((struct tl_softc *));
static int tl_list_tx_init __P((struct tl_softc *));
static u_int8_t tl_dio_read8 __P((struct tl_softc *, u_int8_t));
static u_int16_t tl_dio_read16 __P((struct tl_softc *, u_int8_t));
static u_int32_t tl_dio_read32 __P((struct tl_softc *, u_int8_t));
static void tl_dio_write8 __P((struct tl_softc *, u_int8_t, u_int8_t));
static void tl_dio_write16 __P((struct tl_softc *, u_int8_t, u_int16_t));
static void tl_dio_write32 __P((struct tl_softc *, u_int8_t, u_int32_t));
static void tl_dio_setbit __P((struct tl_softc *, u_int8_t, u_int8_t));
static void tl_dio_clrbit __P((struct tl_softc *, u_int8_t, u_int8_t));
static void tl_dio_setbit16 __P((struct tl_softc *, u_int8_t, u_int16_t));
static void tl_dio_clrbit16 __P((struct tl_softc *, u_int8_t, u_int16_t));
static u_int8_t tl_dio_read8(sc, reg)
struct tl_softc *sc;
u_int8_t reg;
{
CSR_WRITE_2(sc, TL_DIO_ADDR, reg);
return(CSR_READ_1(sc, TL_DIO_DATA + (reg & 3)));
}
static u_int16_t tl_dio_read16(sc, reg)
struct tl_softc *sc;
u_int8_t reg;
{
CSR_WRITE_2(sc, TL_DIO_ADDR, reg);
return(CSR_READ_2(sc, TL_DIO_DATA + (reg & 3)));
}
static u_int32_t tl_dio_read32(sc, reg)
struct tl_softc *sc;
u_int8_t reg;
{
CSR_WRITE_2(sc, TL_DIO_ADDR, reg);
return(CSR_READ_4(sc, TL_DIO_DATA + (reg & 3)));
}
static void tl_dio_write8(sc, reg, val)
struct tl_softc *sc;
u_int8_t reg;
u_int8_t val;
{
CSR_WRITE_2(sc, TL_DIO_ADDR, reg);
CSR_WRITE_1(sc, TL_DIO_DATA + (reg & 3), val);
return;
}
static void tl_dio_write16(sc, reg, val)
struct tl_softc *sc;
u_int8_t reg;
u_int16_t val;
{
CSR_WRITE_2(sc, TL_DIO_ADDR, reg);
CSR_WRITE_2(sc, TL_DIO_DATA + (reg & 3), val);
return;
}
static void tl_dio_write32(sc, reg, val)
struct tl_softc *sc;
u_int8_t reg;
u_int32_t val;
{
CSR_WRITE_2(sc, TL_DIO_ADDR, reg);
CSR_WRITE_4(sc, TL_DIO_DATA + (reg & 3), val);
return;
}
static void tl_dio_setbit(sc, reg, bit)
struct tl_softc *sc;
u_int8_t reg;
u_int8_t bit;
{
u_int8_t f;
CSR_WRITE_2(sc, TL_DIO_ADDR, reg);
f = CSR_READ_1(sc, TL_DIO_DATA + (reg & 3));
f |= bit;
CSR_WRITE_1(sc, TL_DIO_DATA + (reg & 3), f);
return;
}
static void tl_dio_clrbit(sc, reg, bit)
struct tl_softc *sc;
u_int8_t reg;
u_int8_t bit;
{
u_int8_t f;
CSR_WRITE_2(sc, TL_DIO_ADDR, reg);
f = CSR_READ_1(sc, TL_DIO_DATA + (reg & 3));
f &= ~bit;
CSR_WRITE_1(sc, TL_DIO_DATA + (reg & 3), f);
return;
}
static void tl_dio_setbit16(sc, reg, bit)
struct tl_softc *sc;
u_int8_t reg;
u_int16_t bit;
{
u_int16_t f;
CSR_WRITE_2(sc, TL_DIO_ADDR, reg);
f = CSR_READ_2(sc, TL_DIO_DATA + (reg & 3));
f |= bit;
CSR_WRITE_2(sc, TL_DIO_DATA + (reg & 3), f);
return;
}
static void tl_dio_clrbit16(sc, reg, bit)
struct tl_softc *sc;
u_int8_t reg;
u_int16_t bit;
{
u_int16_t f;
CSR_WRITE_2(sc, TL_DIO_ADDR, reg);
f = CSR_READ_2(sc, TL_DIO_DATA + (reg & 3));
f &= ~bit;
CSR_WRITE_2(sc, TL_DIO_DATA + (reg & 3), f);
return;
}
/*
* Send an instruction or address to the EEPROM, check for ACK.
*/
static u_int8_t tl_eeprom_putbyte(sc, byte)
struct tl_softc *sc;
u_int8_t byte;
{
register int i, ack = 0;
/*
* Make sure we're in TX mode.
*/
tl_dio_setbit(sc, TL_NETSIO, TL_SIO_ETXEN);
/*
* Feed in each bit and stobe the clock.
*/
for (i = 0x80; i; i >>= 1) {
if (byte & i) {
tl_dio_setbit(sc, TL_NETSIO, TL_SIO_EDATA);
} else {
tl_dio_clrbit(sc, TL_NETSIO, TL_SIO_EDATA);
}
DELAY(1);
tl_dio_setbit(sc, TL_NETSIO, TL_SIO_ECLOK);
DELAY(1);
tl_dio_clrbit(sc, TL_NETSIO, TL_SIO_ECLOK);
}
/*
* Turn off TX mode.
*/
tl_dio_clrbit(sc, TL_NETSIO, TL_SIO_ETXEN);
/*
* Check for ack.
*/
tl_dio_setbit(sc, TL_NETSIO, TL_SIO_ECLOK);
ack = tl_dio_read8(sc, TL_NETSIO) & TL_SIO_EDATA;
tl_dio_clrbit(sc, TL_NETSIO, TL_SIO_ECLOK);
return(ack);
}
/*
* Read a byte of data stored in the EEPROM at address 'addr.'
*/
static u_int8_t tl_eeprom_getbyte(sc, addr, dest)
struct tl_softc *sc;
u_int8_t addr;
u_int8_t *dest;
{
register int i;
u_int8_t byte = 0;
tl_dio_write8(sc, TL_NETSIO, 0);
EEPROM_START;
/*
* Send write control code to EEPROM.
*/
if (tl_eeprom_putbyte(sc, EEPROM_CTL_WRITE)) {
printf("tl%d: failed to send write command, status: %x\n",
sc->tl_unit, tl_dio_read8(sc, TL_NETSIO));
return(1);
}
/*
* Send address of byte we want to read.
*/
if (tl_eeprom_putbyte(sc, addr)) {
printf("tl%d: failed to send address, status: %x\n",
sc->tl_unit, tl_dio_read8(sc, TL_NETSIO));
return(1);
}
EEPROM_STOP;
EEPROM_START;
/*
* Send read control code to EEPROM.
*/
if (tl_eeprom_putbyte(sc, EEPROM_CTL_READ)) {
printf("tl%d: failed to send write command, status: %x\n",
sc->tl_unit, tl_dio_read8(sc, TL_NETSIO));
return(1);
}
/*
* Start reading bits from EEPROM.
*/
tl_dio_clrbit(sc, TL_NETSIO, TL_SIO_ETXEN);
for (i = 0x80; i; i >>= 1) {
tl_dio_setbit(sc, TL_NETSIO, TL_SIO_ECLOK);
DELAY(1);
if (tl_dio_read8(sc, TL_NETSIO) & TL_SIO_EDATA)
byte |= i;
tl_dio_clrbit(sc, TL_NETSIO, TL_SIO_ECLOK);
DELAY(1);
}
EEPROM_STOP;
/*
* No ACK generated for read, so just return byte.
*/
*dest = byte;
return(0);
}
/*
* Read a sequence of bytes from the EEPROM.
*/
static int tl_read_eeprom(sc, dest, off, cnt)
struct tl_softc *sc;
caddr_t dest;
int off;
int cnt;
{
int err = 0, i;
u_int8_t byte = 0;
for (i = 0; i < cnt; i++) {
err = tl_eeprom_getbyte(sc, off + i, &byte);
if (err)
break;
*(dest + i) = byte;
}
return(err ? 1 : 0);
}
static void tl_mii_sync(sc)
struct tl_softc *sc;
{
register int i;
tl_dio_clrbit(sc, TL_NETSIO, TL_SIO_MTXEN);
for (i = 0; i < 32; i++) {
tl_dio_setbit(sc, TL_NETSIO, TL_SIO_MCLK);
tl_dio_clrbit(sc, TL_NETSIO, TL_SIO_MCLK);
}
return;
}
static void tl_mii_send(sc, bits, cnt)
struct tl_softc *sc;
u_int32_t bits;
int cnt;
{
int i;
for (i = (0x1 << (cnt - 1)); i; i >>= 1) {
tl_dio_clrbit(sc, TL_NETSIO, TL_SIO_MCLK);
if (bits & i) {
tl_dio_setbit(sc, TL_NETSIO, TL_SIO_MDATA);
} else {
tl_dio_clrbit(sc, TL_NETSIO, TL_SIO_MDATA);
}
tl_dio_setbit(sc, TL_NETSIO, TL_SIO_MCLK);
}
}
static int tl_mii_readreg(sc, frame)
struct tl_softc *sc;
struct tl_mii_frame *frame;
{
int i, ack, s;
int minten = 0;
s = splimp();
tl_mii_sync(sc);
/*
* Set up frame for RX.
*/
frame->mii_stdelim = TL_MII_STARTDELIM;
frame->mii_opcode = TL_MII_READOP;
frame->mii_turnaround = 0;
frame->mii_data = 0;
/*
* Turn off MII interrupt by forcing MINTEN low.
*/
minten = tl_dio_read8(sc, TL_NETSIO) & TL_SIO_MINTEN;
if (minten) {
tl_dio_clrbit(sc, TL_NETSIO, TL_SIO_MINTEN);
}
/*
* Turn on data xmit.
*/
tl_dio_setbit(sc, TL_NETSIO, TL_SIO_MTXEN);
/*
* Send command/address info.
*/
tl_mii_send(sc, frame->mii_stdelim, 2);
tl_mii_send(sc, frame->mii_opcode, 2);
tl_mii_send(sc, frame->mii_phyaddr, 5);
tl_mii_send(sc, frame->mii_regaddr, 5);
/*
* Turn off xmit.
*/
tl_dio_clrbit(sc, TL_NETSIO, TL_SIO_MTXEN);
/* Idle bit */
tl_dio_clrbit(sc, TL_NETSIO, TL_SIO_MCLK);
tl_dio_setbit(sc, TL_NETSIO, TL_SIO_MCLK);
/* Check for ack */
tl_dio_clrbit(sc, TL_NETSIO, TL_SIO_MCLK);
ack = tl_dio_read8(sc, TL_NETSIO) & TL_SIO_MDATA;
/* Complete the cycle */
tl_dio_setbit(sc, TL_NETSIO, TL_SIO_MCLK);
/*
* Now try reading data bits. If the ack failed, we still
* need to clock through 16 cycles to keep the PHYs in sync.
*/
if (ack) {
for(i = 0; i < 16; i++) {
tl_dio_clrbit(sc, TL_NETSIO, TL_SIO_MCLK);
tl_dio_setbit(sc, TL_NETSIO, TL_SIO_MCLK);
}
goto fail;
}
for (i = 0x8000; i; i >>= 1) {
tl_dio_clrbit(sc, TL_NETSIO, TL_SIO_MCLK);
if (!ack) {
if (tl_dio_read8(sc, TL_NETSIO) & TL_SIO_MDATA)
frame->mii_data |= i;
}
tl_dio_setbit(sc, TL_NETSIO, TL_SIO_MCLK);
}
fail:
tl_dio_setbit(sc, TL_NETSIO, TL_SIO_MCLK);
tl_dio_clrbit(sc, TL_NETSIO, TL_SIO_MCLK);
/* Reenable interrupts */
if (minten) {
tl_dio_setbit(sc, TL_NETSIO, TL_SIO_MINTEN);
}
splx(s);
if (ack)
return(1);
return(0);
}
static int tl_mii_writereg(sc, frame)
struct tl_softc *sc;
struct tl_mii_frame *frame;
{
int s;
int minten;
tl_mii_sync(sc);
s = splimp();
/*
* Set up frame for TX.
*/
frame->mii_stdelim = TL_MII_STARTDELIM;
frame->mii_opcode = TL_MII_WRITEOP;
frame->mii_turnaround = TL_MII_TURNAROUND;
/*
* Turn off MII interrupt by forcing MINTEN low.
*/
minten = tl_dio_read8(sc, TL_NETSIO) & TL_SIO_MINTEN;
if (minten) {
tl_dio_clrbit(sc, TL_NETSIO, TL_SIO_MINTEN);
}
/*
* Turn on data output.
*/
tl_dio_setbit(sc, TL_NETSIO, TL_SIO_MTXEN);
tl_mii_send(sc, frame->mii_stdelim, 2);
tl_mii_send(sc, frame->mii_opcode, 2);
tl_mii_send(sc, frame->mii_phyaddr, 5);
tl_mii_send(sc, frame->mii_regaddr, 5);
tl_mii_send(sc, frame->mii_turnaround, 2);
tl_mii_send(sc, frame->mii_data, 16);
tl_dio_setbit(sc, TL_NETSIO, TL_SIO_MCLK);
tl_dio_clrbit(sc, TL_NETSIO, TL_SIO_MCLK);
/*
* Turn off xmit.
*/
tl_dio_clrbit(sc, TL_NETSIO, TL_SIO_MTXEN);
/* Reenable interrupts */
if (minten)
tl_dio_setbit(sc, TL_NETSIO, TL_SIO_MINTEN);
splx(s);
return(0);
}
static u_int16_t tl_phy_readreg(sc, reg)
struct tl_softc *sc;
int reg;
{
struct tl_mii_frame frame;
bzero((char *)&frame, sizeof(frame));
frame.mii_phyaddr = sc->tl_phy_addr;
frame.mii_regaddr = reg;
tl_mii_readreg(sc, &frame);
/* Reenable MII interrupts, just in case. */
tl_dio_setbit(sc, TL_NETSIO, TL_SIO_MINTEN);
return(frame.mii_data);
}
static void tl_phy_writereg(sc, reg, data)
struct tl_softc *sc;
u_int16_t reg;
u_int16_t data;
{
struct tl_mii_frame frame;
bzero((char *)&frame, sizeof(frame));
frame.mii_phyaddr = sc->tl_phy_addr;
frame.mii_regaddr = reg;
frame.mii_data = data;
tl_mii_writereg(sc, &frame);
/* Reenable MII interrupts, just in case. */
tl_dio_setbit(sc, TL_NETSIO, TL_SIO_MINTEN);
return;
}
/*
* Initiate autonegotiation with a link partner.
*
* Note that the Texas Instruments ThunderLAN programmer's guide
* fails to mention one very important point about autonegotiation.
* Autonegotiation is done largely by the PHY, independent of the
* ThunderLAN chip itself: the PHY sets the flags in the BMCR
* register to indicate what modes were selected and if link status
* is good. In fact, the PHY does pretty much all of the work itself,
* except for one small detail.
*
* The PHY may negotiate a full-duplex of half-duplex link, and set
* the PHY_BMCR_DUPLEX bit accordingly, but the ThunderLAN's 'NetCommand'
* register _also_ has a half-duplex/full-duplex bit, and you MUST ALSO
* SET THIS BIT MANUALLY TO CORRESPOND TO THE MODE SELECTED FOR THE PHY!
* In other words, both the ThunderLAN chip and the PHY have to be
* programmed for full-duplex mode in order for full-duplex to actually
* work. So in order for autonegotiation to really work right, we have
* to wait for the link to come up, check the BMCR register, then set
* the ThunderLAN for full or half-duplex as needed.
*
* I struggled for two days to figure this out, so I'm making a point
* of drawing attention to this fact. I think it's very strange that
* the ThunderLAN doesn't automagically track the duplex state of the
* PHY, but there you have it.
*
* Also when, using a National Semiconductor DP83840A PHY, we have to
* allow a full three seconds for autonegotiation to complete. So what
* we do is flip the autonegotiation restart bit, then set a timeout
* to wake us up in three seconds to check the link state.
*
* Note that there are some versions of the Olicom 2326 that use a
* Micro Linear ML6692 100BaseTX PHY. This particular PHY is designed
* to provide 100BaseTX support only, but can be used with a controller
* that supports an internal 10Mbps PHY to provide a complete
* 10/100Mbps solution. However, the ML6692 does not have vendor and
* device ID registers, and hence always shows up with a vendor/device
* ID of 0.
*
* We detect this configuration by checking the phy vendor ID in the
* softc structure. If it's a zero, and we're negotiating a high-speed
* mode, then we turn off the internal PHY. If it's a zero and we've
* negotiated a high-speed mode, we turn on the internal PHY. Note
* that to make things even more fun, we have to make extra sure that
* the loopback bit in the internal PHY's control register is turned
* off.
*/
static void tl_autoneg(sc, flag, verbose)
struct tl_softc *sc;
int flag;
int verbose;
{
u_int16_t phy_sts = 0, media = 0, advert, ability;
struct ifnet *ifp;
struct ifmedia *ifm;
ifm = &sc->ifmedia;
ifp = &sc->arpcom.ac_if;
/*
* First, see if autoneg is supported. If not, there's
* no point in continuing.
*/
phy_sts = tl_phy_readreg(sc, PHY_BMSR);
if (!(phy_sts & PHY_BMSR_CANAUTONEG)) {
if (verbose)
printf("tl%d: autonegotiation not supported\n",
sc->tl_unit);
return;
}
switch (flag) {
case TL_FLAG_FORCEDELAY:
/*
* XXX Never use this option anywhere but in the probe
* routine: making the kernel stop dead in its tracks
* for three whole seconds after we've gone multi-user
* is really bad manners.
*/
tl_phy_writereg(sc, PHY_BMCR, PHY_BMCR_RESET);
DELAY(500);
phy_sts = tl_phy_readreg(sc, PHY_BMCR);
phy_sts |= PHY_BMCR_AUTONEGENBL|PHY_BMCR_AUTONEGRSTR;
tl_phy_writereg(sc, PHY_BMCR, phy_sts);
DELAY(5000000);
break;
case TL_FLAG_SCHEDDELAY:
#ifdef TL_DEBUG
evset(sc, EV_AUTONEG_XMIT);
#endif
/*
* Wait for the transmitter to go idle before starting
* an autoneg session, otherwise tl_start() may clobber
* our timeout, and we don't want to allow transmission
* during an autoneg session since that can screw it up.
*/
if (!sc->tl_txeoc) {
sc->tl_want_auto = 1;
return;
}
tl_phy_writereg(sc, PHY_BMCR, PHY_BMCR_RESET);
DELAY(500);
phy_sts = tl_phy_readreg(sc, PHY_BMCR);
phy_sts |= PHY_BMCR_AUTONEGENBL|PHY_BMCR_AUTONEGRSTR;
tl_phy_writereg(sc, PHY_BMCR, phy_sts);
ifp->if_timer = 5;
sc->tl_autoneg = 1;
sc->tl_want_auto = 0;
return;
case TL_FLAG_DELAYTIMEO:
#ifdef TL_DEBUG
evset(sc, EV_AUTONEG_FIN);
#endif
ifp->if_timer = 0;
sc->tl_autoneg = 0;
break;
default:
printf("tl%d: invalid autoneg flag: %d\n", sc->tl_unit, flag);
return;
}
/*
* Read the BMSR register twice: the LINKSTAT bit is a
* latching bit.
*/
tl_phy_readreg(sc, PHY_BMSR);
phy_sts = tl_phy_readreg(sc, PHY_BMSR);
if (phy_sts & PHY_BMSR_AUTONEGCOMP) {
if (verbose)
printf("tl%d: autoneg complete, ", sc->tl_unit);
phy_sts = tl_phy_readreg(sc, PHY_BMSR);
} else {
if (verbose)
printf("tl%d: autoneg not complete, ", sc->tl_unit);
}
/* Link is good. Report modes and set duplex mode. */
if (phy_sts & PHY_BMSR_LINKSTAT) {
if (verbose)
printf("link status good ");
advert = tl_phy_readreg(sc, TL_PHY_ANAR);
ability = tl_phy_readreg(sc, TL_PHY_LPAR);
media = tl_phy_readreg(sc, PHY_BMCR);
/*
* Be sure to turn off the ISOLATE and
* LOOPBACK bits in the control register,
* otherwise we may not be able to communicate.
*/
media &= ~(PHY_BMCR_LOOPBK|PHY_BMCR_ISOLATE);
/* Set the DUPLEX bit in the NetCmd register accordingly. */
if (advert & PHY_ANAR_100BT4 && ability & PHY_ANAR_100BT4) {
ifm->ifm_media = IFM_ETHER|IFM_100_T4;
media |= PHY_BMCR_SPEEDSEL;
media &= ~PHY_BMCR_DUPLEX;
if (verbose)
printf("(100baseT4)\n");
} else if (advert & PHY_ANAR_100BTXFULL &&
ability & PHY_ANAR_100BTXFULL) {
ifm->ifm_media = IFM_ETHER|IFM_100_TX|IFM_FDX;
media |= PHY_BMCR_SPEEDSEL;
media |= PHY_BMCR_DUPLEX;
if (verbose)
printf("(full-duplex, 100Mbps)\n");
} else if (advert & PHY_ANAR_100BTXHALF &&
ability & PHY_ANAR_100BTXHALF) {
ifm->ifm_media = IFM_ETHER|IFM_100_TX|IFM_HDX;
media |= PHY_BMCR_SPEEDSEL;
media &= ~PHY_BMCR_DUPLEX;
if (verbose)
printf("(half-duplex, 100Mbps)\n");
} else if (advert & PHY_ANAR_10BTFULL &&
ability & PHY_ANAR_10BTFULL) {
ifm->ifm_media = IFM_ETHER|IFM_10_T|IFM_FDX;
media &= ~PHY_BMCR_SPEEDSEL;
media |= PHY_BMCR_DUPLEX;
if (verbose)
printf("(full-duplex, 10Mbps)\n");
} else {
ifm->ifm_media = IFM_ETHER|IFM_10_T|IFM_HDX;
media &= ~PHY_BMCR_SPEEDSEL;
media &= ~PHY_BMCR_DUPLEX;
if (verbose)
printf("(half-duplex, 10Mbps)\n");
}
if (media & PHY_BMCR_DUPLEX)
tl_dio_setbit(sc, TL_NETCMD, TL_CMD_DUPLEX);
else
tl_dio_clrbit(sc, TL_NETCMD, TL_CMD_DUPLEX);
media &= ~PHY_BMCR_AUTONEGENBL;
tl_phy_writereg(sc, PHY_BMCR, media);
} else {
if (verbose)
printf("no carrier\n");
}
tl_init(sc);
if (sc->tl_tx_pend) {
sc->tl_autoneg = 0;
sc->tl_tx_pend = 0;
tl_start(ifp);
}
return;
}
/*
* Set speed and duplex mode. Also program autoneg advertisements
* accordingly.
*/
static void tl_setmode(sc, media)
struct tl_softc *sc;
int media;
{
u_int16_t bmcr;
bmcr = tl_phy_readreg(sc, PHY_BMCR);
bmcr &= ~(PHY_BMCR_SPEEDSEL|PHY_BMCR_DUPLEX|PHY_BMCR_AUTONEGENBL|
PHY_BMCR_LOOPBK|PHY_BMCR_ISOLATE);
if (IFM_SUBTYPE(media) == IFM_LOOP)
bmcr |= PHY_BMCR_LOOPBK;
if (IFM_SUBTYPE(media) == IFM_AUTO)
bmcr |= PHY_BMCR_AUTONEGENBL;
/*
* The ThunderLAN's internal PHY has an AUI transceiver
* that can be selected. This is usually attached to a
* 10base2/BNC port. In order to activate this port, we
* have to set the AUISEL bit in the internal PHY's
* special control register.
*/
if (IFM_SUBTYPE(media) == IFM_10_5) {
u_int16_t addr, ctl;
addr = sc->tl_phy_addr;
sc->tl_phy_addr = TL_PHYADDR_MAX;
ctl = tl_phy_readreg(sc, TL_PHY_CTL);
ctl |= PHY_CTL_AUISEL;
tl_phy_writereg(sc, TL_PHY_CTL, ctl);
tl_phy_writereg(sc, PHY_BMCR, bmcr);
sc->tl_phy_addr = addr;
bmcr |= PHY_BMCR_ISOLATE;
} else {
u_int16_t addr, ctl;
addr = sc->tl_phy_addr;
sc->tl_phy_addr = TL_PHYADDR_MAX;
ctl = tl_phy_readreg(sc, TL_PHY_CTL);
ctl &= ~PHY_CTL_AUISEL;
tl_phy_writereg(sc, TL_PHY_CTL, ctl);
tl_phy_writereg(sc, PHY_BMCR, PHY_BMCR_ISOLATE);
sc->tl_phy_addr = addr;
bmcr &= ~PHY_BMCR_ISOLATE;
}
if (IFM_SUBTYPE(media) == IFM_100_TX) {
bmcr |= PHY_BMCR_SPEEDSEL;
if ((media & IFM_GMASK) == IFM_FDX) {
bmcr |= PHY_BMCR_DUPLEX;
tl_dio_setbit(sc, TL_NETCMD, TL_CMD_DUPLEX);
} else {
bmcr &= ~PHY_BMCR_DUPLEX;
tl_dio_clrbit(sc, TL_NETCMD, TL_CMD_DUPLEX);
}
}
if (IFM_SUBTYPE(media) == IFM_10_T) {
bmcr &= ~PHY_BMCR_SPEEDSEL;
if ((media & IFM_GMASK) == IFM_FDX) {
bmcr |= PHY_BMCR_DUPLEX;
tl_dio_setbit(sc, TL_NETCMD, TL_CMD_DUPLEX);
} else {
bmcr &= ~PHY_BMCR_DUPLEX;
tl_dio_clrbit(sc, TL_NETCMD, TL_CMD_DUPLEX);
}
}
tl_phy_writereg(sc, PHY_BMCR, bmcr);
tl_init(sc);
return;
}
/*
* Calculate the hash of a MAC address for programming the multicast hash
* table. This hash is simply the address split into 6-bit chunks
* XOR'd, e.g.
* byte: 000000|00 1111|1111 22|222222|333333|33 4444|4444 55|555555
* bit: 765432|10 7654|3210 76|543210|765432|10 7654|3210 76|543210
* Bytes 0-2 and 3-5 are symmetrical, so are folded together. Then
* the folded 24-bit value is split into 6-bit portions and XOR'd.
*/
static int tl_calchash(addr)
unsigned char *addr;
{
int t;
t = (addr[0] ^ addr[3]) << 16 | (addr[1] ^ addr[4]) << 8 |
(addr[2] ^ addr[5]);
return ((t >> 18) ^ (t >> 12) ^ (t >> 6) ^ t) & 0x3f;
}
/*
* The ThunderLAN has a perfect MAC address filter in addition to
* the multicast hash filter. The perfect filter can be programmed
* with up to four MAC addresses. The first one is always used to
* hold the station address, which leaves us free to use the other
* three for multicast addresses.
*/
static void tl_setfilt(sc, addr, slot)
struct tl_softc *sc;
u_int8_t *addr;
int slot;
{
int i;
u_int16_t regaddr;
regaddr = TL_AREG0_B5 + (slot * ETHER_ADDR_LEN);
for (i = 0; i < ETHER_ADDR_LEN; i++)
tl_dio_write8(sc, regaddr + i, *(addr + i));
return;
}
/*
* XXX In FreeBSD 3.0, multicast addresses are managed using a doubly
* linked list. This is fine, except addresses are added from the head
* end of the list. We want to arrange for 224.0.0.1 (the "all hosts")
* group to always be in the perfect filter, but as more groups are added,
* the 224.0.0.1 entry (which is always added first) gets pushed down
* the list and ends up at the tail. So after 3 or 4 multicast groups
* are added, the all-hosts entry gets pushed out of the perfect filter
* and into the hash table.
*
* Because the multicast list is a doubly-linked list as opposed to a
* circular queue, we don't have the ability to just grab the tail of
* the list and traverse it backwards. Instead, we have to traverse
* the list once to find the tail, then traverse it again backwards to
* update the multicast filter.
*/
static void tl_setmulti(sc)
struct tl_softc *sc;
{
struct ifnet *ifp;
u_int32_t hashes[2] = { 0, 0 };
int h, i;
struct ifmultiaddr *ifma;
u_int8_t dummy[] = { 0, 0, 0, 0, 0 ,0 };
ifp = &sc->arpcom.ac_if;
/* First, zot all the existing filters. */
for (i = 1; i < 4; i++)
tl_setfilt(sc, dummy, i);
tl_dio_write32(sc, TL_HASH1, 0);
tl_dio_write32(sc, TL_HASH2, 0);
/* Now program new ones. */
if (ifp->if_flags & IFF_ALLMULTI) {
hashes[0] = 0xFFFFFFFF;
hashes[1] = 0xFFFFFFFF;
} else {
i = 1;
/* First find the tail of the list. */
for (ifma = ifp->if_multiaddrs.lh_first; ifma != NULL;
ifma = ifma->ifma_link.le_next) {
if (ifma->ifma_link.le_next == NULL)
break;
}
/* Now traverse the list backwards. */
for (; ifma != NULL && ifma != (void *)&ifp->if_multiaddrs;
ifma = (struct ifmultiaddr *)ifma->ifma_link.le_prev) {
if (ifma->ifma_addr->sa_family != AF_LINK)
continue;
/*
* Program the first three multicast groups
* into the perfect filter. For all others,
* use the hash table.
*/
if (i < 4) {
tl_setfilt(sc,
LLADDR((struct sockaddr_dl *)ifma->ifma_addr), i);
i++;
continue;
}
h = tl_calchash(
LLADDR((struct sockaddr_dl *)ifma->ifma_addr));
if (h < 32)
hashes[0] |= (1 << h);
else
hashes[1] |= (1 << (h - 32));
}
}
tl_dio_write32(sc, TL_HASH1, hashes[0]);
tl_dio_write32(sc, TL_HASH2, hashes[1]);
return;
}
/*
* This routine is recommended by the ThunderLAN manual to insure that
* the internal PHY is powered up correctly. It also recommends a one
* second pause at the end to 'wait for the clocks to start' but in my
* experience this isn't necessary.
*/
static void tl_hardreset(sc)
struct tl_softc *sc;
{
int i;
u_int16_t old_addr, flags;
old_addr = sc->tl_phy_addr;
for (i = 0; i < TL_PHYADDR_MAX + 1; i++) {
sc->tl_phy_addr = i;
tl_mii_sync(sc);
}
flags = PHY_BMCR_LOOPBK|PHY_BMCR_ISOLATE|PHY_BMCR_PWRDOWN;
for (i = 0; i < TL_PHYADDR_MAX + 1; i++) {
sc->tl_phy_addr = i;
tl_phy_writereg(sc, PHY_BMCR, flags);
}
sc->tl_phy_addr = TL_PHYADDR_MAX;
tl_phy_writereg(sc, PHY_BMCR, PHY_BMCR_ISOLATE);
DELAY(50000);
tl_phy_writereg(sc, PHY_BMCR, PHY_BMCR_LOOPBK|PHY_BMCR_ISOLATE);
tl_mii_sync(sc);
while(tl_phy_readreg(sc, PHY_BMCR) & PHY_BMCR_RESET);
sc->tl_phy_addr = old_addr;
return;
}
static void tl_softreset(sc, internal)
struct tl_softc *sc;
int internal;
{
u_int32_t cmd, dummy, i;
/* Assert the adapter reset bit. */
CMD_SET(sc, TL_CMD_ADRST);
/* Turn off interrupts */
CMD_SET(sc, TL_CMD_INTSOFF);
/* First, clear the stats registers. */
for (i = 0; i < 5; i++)
dummy = tl_dio_read32(sc, TL_TXGOODFRAMES);
/* Clear Areg and Hash registers */
for (i = 0; i < 8; i++)
tl_dio_write32(sc, TL_AREG0_B5, 0x00000000);
/*
* Set up Netconfig register. Enable one channel and
* one fragment mode.
*/
tl_dio_setbit16(sc, TL_NETCONFIG, TL_CFG_ONECHAN|TL_CFG_ONEFRAG);
if (internal) {
tl_dio_setbit16(sc, TL_NETCONFIG, TL_CFG_PHYEN);
} else {
tl_dio_clrbit16(sc, TL_NETCONFIG, TL_CFG_PHYEN);
}
/* Set PCI burst size */
tl_dio_write8(sc, TL_BSIZEREG, 0x33);
/*
* Load adapter irq pacing timer and tx threshold.
* We make the transmit threshold 1 initially but we may
* change that later.
*/
cmd = CSR_READ_4(sc, TL_HOSTCMD);
cmd |= TL_CMD_NES;
cmd &= ~(TL_CMD_RT|TL_CMD_EOC|TL_CMD_ACK_MASK|TL_CMD_CHSEL_MASK);
CMD_PUT(sc, cmd | (TL_CMD_LDTHR | TX_THR));
CMD_PUT(sc, cmd | (TL_CMD_LDTMR | 0x00000003));
/* Unreset the MII */
tl_dio_setbit(sc, TL_NETSIO, TL_SIO_NMRST);
/* Clear status register */
tl_dio_setbit16(sc, TL_NETSTS, TL_STS_MIRQ);
tl_dio_setbit16(sc, TL_NETSTS, TL_STS_HBEAT);
tl_dio_setbit16(sc, TL_NETSTS, TL_STS_TXSTOP);
tl_dio_setbit16(sc, TL_NETSTS, TL_STS_RXSTOP);
/* Enable network status interrupts for everything. */
tl_dio_setbit(sc, TL_NETMASK, TL_MASK_MASK7|TL_MASK_MASK6|
TL_MASK_MASK5|TL_MASK_MASK4);
/* Take the adapter out of reset */
tl_dio_setbit(sc, TL_NETCMD, TL_CMD_NRESET|TL_CMD_NWRAP);
/* Wait for things to settle down a little. */
DELAY(500);
return;
}
/*
* Probe for a ThunderLAN chip. Check the PCI vendor and device IDs
* against our list and return its name if we find a match.
*/
static char *
tl_probe(config_id, device_id)
pcici_t config_id;
pcidi_t device_id;
{
struct tl_type *t;
t = tl_devs;
while(t->tl_name != NULL) {
if ((device_id & 0xFFFF) == t->tl_vid &&
((device_id >> 16) & 0xFFFF) == t->tl_did)
return(t->tl_name);
t++;
}
return(NULL);
}
/*
* Do the interface setup and attach for a PHY on a particular
* ThunderLAN chip. Also also set up interrupt vectors.
*/
static int tl_attach_phy(sc)
struct tl_softc *sc;
{
int phy_ctl;
struct tl_type *p = tl_phys;
int media = IFM_ETHER|IFM_100_TX|IFM_FDX;
struct ifnet *ifp;
ifp = &sc->arpcom.ac_if;
sc->tl_phy_did = tl_phy_readreg(sc, TL_PHY_DEVID);
sc->tl_phy_vid = tl_phy_readreg(sc, TL_PHY_VENID);
sc->tl_phy_sts = tl_phy_readreg(sc, TL_PHY_GENSTS);
phy_ctl = tl_phy_readreg(sc, TL_PHY_GENCTL);
/*
* PHY revision numbers tend to vary a bit. Our algorithm here
* is to check everything but the 8 least significant bits.
*/
while(p->tl_vid) {
if (sc->tl_phy_vid == p->tl_vid &&
(sc->tl_phy_did | 0x000F) == p->tl_did) {
sc->tl_pinfo = p;
break;
}
p++;
}
if (sc->tl_pinfo == NULL) {
sc->tl_pinfo = &tl_phys[PHY_UNKNOWN];
}
if (sc->tl_phy_sts & PHY_BMSR_100BT4 ||
sc->tl_phy_sts & PHY_BMSR_100BTXFULL ||
sc->tl_phy_sts & PHY_BMSR_100BTXHALF)
ifp->if_baudrate = 100000000;
else
ifp->if_baudrate = 10000000;
if (bootverbose) {
printf("tl%d: phy at mii address %d\n", sc->tl_unit,
sc->tl_phy_addr);
printf("tl%d: %s ", sc->tl_unit, sc->tl_pinfo->tl_name);
}
if (sc->tl_phy_sts & PHY_BMSR_100BT4 ||
sc->tl_phy_sts & PHY_BMSR_100BTXHALF ||
sc->tl_phy_sts & PHY_BMSR_100BTXHALF)
if (bootverbose)
printf("10/100Mbps ");
else {
media &= ~IFM_100_TX;
media |= IFM_10_T;
if (bootverbose)
printf("10Mbps ");
}
if (sc->tl_phy_sts & PHY_BMSR_100BTXFULL ||
sc->tl_phy_sts & PHY_BMSR_10BTFULL)
if (bootverbose)
printf("full duplex ");
else {
if (bootverbose)
printf("half duplex ");
media &= ~IFM_FDX;
}
if (sc->tl_phy_sts & PHY_BMSR_CANAUTONEG) {
media = IFM_ETHER|IFM_AUTO;
if (bootverbose)
printf("autonegotiating\n");
} else
if (bootverbose)
printf("\n");
/* If this isn't a known PHY, print the PHY indentifier info. */
if (sc->tl_pinfo->tl_vid == 0 && bootverbose)
printf("tl%d: vendor id: %04x product id: %04x\n",
sc->tl_unit, sc->tl_phy_vid, sc->tl_phy_did);
/* Set up ifmedia data and callbacks. */
ifmedia_init(&sc->ifmedia, 0, tl_ifmedia_upd, tl_ifmedia_sts);
/*
* All ThunderLANs support at least 10baseT half duplex.
* They also support AUI selection if used in 10Mb/s modes.
*/
ifmedia_add(&sc->ifmedia, IFM_ETHER|IFM_10_T|IFM_HDX, 0, NULL);
ifmedia_add(&sc->ifmedia, IFM_ETHER|IFM_10_T, 0, NULL);
ifmedia_add(&sc->ifmedia, IFM_ETHER|IFM_10_5, 0, NULL);
/* Some ThunderLAN PHYs support autonegotiation. */
if (sc->tl_phy_sts & PHY_BMSR_CANAUTONEG)
ifmedia_add(&sc->ifmedia, IFM_ETHER|IFM_AUTO, 0, NULL);
/* Some support 10baseT full duplex. */
if (sc->tl_phy_sts & PHY_BMSR_10BTFULL)
ifmedia_add(&sc->ifmedia,
IFM_ETHER|IFM_10_T|IFM_FDX, 0, NULL);
/* Some support 100BaseTX half duplex. */
if (sc->tl_phy_sts & PHY_BMSR_100BTXHALF)
ifmedia_add(&sc->ifmedia, IFM_ETHER|IFM_100_TX, 0, NULL);
if (sc->tl_phy_sts & PHY_BMSR_100BTXHALF)
ifmedia_add(&sc->ifmedia,
IFM_ETHER|IFM_100_TX|IFM_HDX, 0, NULL);
/* Some support 100BaseTX full duplex. */
if (sc->tl_phy_sts & PHY_BMSR_100BTXFULL)
ifmedia_add(&sc->ifmedia,
IFM_ETHER|IFM_100_TX|IFM_FDX, 0, NULL);
/* Some also support 100BaseT4. */
if (sc->tl_phy_sts & PHY_BMSR_100BT4)
ifmedia_add(&sc->ifmedia, IFM_ETHER|IFM_100_T4, 0, NULL);
/* Set default media. */
ifmedia_set(&sc->ifmedia, media);
/*
* Kick off an autonegotiation session if this PHY supports it.
* This is necessary to make sure the chip's duplex mode matches
* the PHY's duplex mode. It may not: once enabled, the PHY may
* autonegotiate full-duplex mode with its link partner, but the
* ThunderLAN chip defaults to half-duplex and stays there unless
* told otherwise.
*/
if (sc->tl_phy_sts & PHY_BMSR_CANAUTONEG) {
tl_init(sc);
#ifdef TL_BACKGROUND_AUTONEG
tl_autoneg(sc, TL_FLAG_SCHEDDELAY, 1);
#else
tl_autoneg(sc, TL_FLAG_FORCEDELAY, 1);
#endif
}
return(0);
}
static void
tl_attach(config_id, unit)
pcici_t config_id;
int unit;
{
int s, i, phys = 0;
#ifndef TL_USEIOSPACE
vm_offset_t pbase, vbase;
#endif
u_int32_t command;
u_int16_t did, vid;
struct tl_type *t;
struct ifnet *ifp;
struct tl_softc *sc;
unsigned int round;
caddr_t roundptr;
s = splimp();
vid = pci_cfgread(config_id, PCIR_VENDOR, 2);
did = pci_cfgread(config_id, PCIR_DEVICE, 2);
t = tl_devs;
while(t->tl_name != NULL) {
if (vid == t->tl_vid && did == t->tl_did)
break;
t++;
}
if (t->tl_name == NULL) {
printf("tl%d: unknown device!?\n", unit);
goto fail;
}
/* First, allocate memory for the softc struct. */
sc = malloc(sizeof(struct tl_softc), M_DEVBUF, M_NOWAIT);
if (sc == NULL) {
printf("tl%d: no memory for softc struct!\n", unit);
goto fail;
}
bzero(sc, sizeof(struct tl_softc));
/*
* Map control/status registers.
*/
command = pci_conf_read(config_id, PCI_COMMAND_STATUS_REG);
command |= (PCIM_CMD_PORTEN|PCIM_CMD_MEMEN|PCIM_CMD_BUSMASTEREN);
pci_conf_write(config_id, PCI_COMMAND_STATUS_REG, command);
command = pci_conf_read(config_id, PCI_COMMAND_STATUS_REG);
#ifdef TL_USEIOSPACE
if (!(command & PCIM_CMD_PORTEN)) {
printf("tl%d: failed to enable I/O ports!\n", unit);
free(sc, M_DEVBUF);
goto fail;
}
sc->iobase = pci_conf_read(config_id, TL_PCI_LOIO) & 0xFFFFFFFC;
#else
if (!(command & PCIM_CMD_MEMEN)) {
printf("tl%d: failed to enable memory mapping!\n", unit);
goto fail;
}
if (!pci_map_mem(config_id, TL_PCI_LOMEM, &vbase, &pbase)) {
printf ("tl%d: couldn't map memory\n", unit);
goto fail;
}
sc->csr = (volatile caddr_t)vbase;
#endif
#ifdef notdef
/*
* The ThunderLAN manual suggests jacking the PCI latency
* timer all the way up to its maximum value. I'm not sure
* if this is really necessary, but what the manual wants,
* the manual gets.
*/
command = pci_conf_read(config_id, TL_PCI_LATENCY_TIMER);
command |= 0x0000FF00;
pci_conf_write(config_id, TL_PCI_LATENCY_TIMER, command);
#endif
/* Allocate interrupt */
if (!pci_map_int(config_id, tl_intr, sc, &net_imask)) {
printf("tl%d: couldn't map interrupt\n", unit);
goto fail;
}
/*
* Now allocate memory for the TX and RX lists. Note that
* we actually allocate 8 bytes more than we really need:
* this is because we need to adjust the final address to
* be aligned on a quadword (64-bit) boundary in order to
* make the chip happy. If the list structures aren't properly
* aligned, DMA fails and the chip generates an adapter check
* interrupt and has to be reset. If you set up the softc struct
* just right you can sort of obtain proper alignment 'by chance.'
* But I don't want to depend on this, so instead the alignment
* is forced here.
*/
sc->tl_ldata_ptr = malloc(sizeof(struct tl_list_data) + 8,
M_DEVBUF, M_NOWAIT);
if (sc->tl_ldata_ptr == NULL) {
free(sc, M_DEVBUF);
printf("tl%d: no memory for list buffers!\n", unit);
goto fail;
}
/*
* Convoluted but satisfies my ANSI sensibilities. GCC lets
* you do casts on the LHS of an assignment, but ANSI doesn't
* allow that.
*/
sc->tl_ldata = (struct tl_list_data *)sc->tl_ldata_ptr;
round = (unsigned int)sc->tl_ldata_ptr & 0xF;
roundptr = sc->tl_ldata_ptr;
for (i = 0; i < 8; i++) {
if (round % 8) {
round++;
roundptr++;
} else
break;
}
sc->tl_ldata = (struct tl_list_data *)roundptr;
bzero(sc->tl_ldata, sizeof(struct tl_list_data));
sc->tl_unit = unit;
sc->tl_dinfo = t;
if (t->tl_vid == COMPAQ_VENDORID)
sc->tl_eeaddr = TL_EEPROM_EADDR;
if (t->tl_vid == OLICOM_VENDORID)
sc->tl_eeaddr = TL_EEPROM_EADDR_OC;
/* Reset the adapter. */
tl_softreset(sc, 1);
tl_hardreset(sc);
tl_softreset(sc, 1);
/*
* Get station address from the EEPROM.
*/
if (tl_read_eeprom(sc, (caddr_t)&sc->arpcom.ac_enaddr,
sc->tl_eeaddr, ETHER_ADDR_LEN)) {
printf("tl%d: failed to read station address\n", unit);
goto fail;
}
/*
* XXX Olicom, in its desire to be different from the
* rest of the world, has done strange things with the
* encoding of the station address in the EEPROM. First
* of all, they store the address at offset 0xF8 rather
* than at 0x83 like the ThunderLAN manual suggests.
* Second, they store the address in three 16-bit words in
* network byte order, as opposed to storing it sequentially
* like all the other ThunderLAN cards. In order to get
* the station address in a form that matches what the Olicom
* diagnostic utility specifies, we have to byte-swap each
* word. To make things even more confusing, neither 00:00:28
* nor 00:00:24 appear in the IEEE OUI database.
*/
if (sc->tl_dinfo->tl_vid == OLICOM_VENDORID) {
for (i = 0; i < ETHER_ADDR_LEN; i += 2) {
u_int16_t *p;
p = (u_int16_t *)&sc->arpcom.ac_enaddr[i];
*p = ntohs(*p);
}
}
/*
* A ThunderLAN chip was detected. Inform the world.
*/
printf("tl%d: Ethernet address: %6D\n", unit,
sc->arpcom.ac_enaddr, ":");
ifp = &sc->arpcom.ac_if;
ifp->if_softc = sc;
ifp->if_unit = sc->tl_unit;
ifp->if_name = "tl";
ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST;
ifp->if_ioctl = tl_ioctl;
ifp->if_output = ether_output;
ifp->if_start = tl_start;
ifp->if_watchdog = tl_watchdog;
ifp->if_init = tl_init;
ifp->if_mtu = ETHERMTU;
callout_handle_init(&sc->tl_stat_ch);
/* Reset the adapter again. */
tl_softreset(sc, 1);
tl_hardreset(sc);
tl_softreset(sc, 1);
/*
* Now attach the ThunderLAN's PHYs. There will always
* be at least one PHY; if the PHY address is 0x1F, then
* it's the internal one.
*/
for (i = TL_PHYADDR_MIN; i < TL_PHYADDR_MAX + 1; i++) {
sc->tl_phy_addr = i;
if (bootverbose)
printf("tl%d: looking for phy at addr %x\n", unit, i);
tl_phy_writereg(sc, PHY_BMCR, PHY_BMCR_RESET);
DELAY(500);
while(tl_phy_readreg(sc, PHY_BMCR) & PHY_BMCR_RESET);
sc->tl_phy_sts = tl_phy_readreg(sc, PHY_BMSR);
if (bootverbose)
printf("tl%d: status: %x\n", unit, sc->tl_phy_sts);
if (!sc->tl_phy_sts)
continue;
if (tl_attach_phy(sc)) {
printf("tl%d: failed to attach a phy %d\n", unit, i);
goto fail;
}
phys++;
if (phys && i != TL_PHYADDR_MAX)
break;
}
if (!phys) {
printf("tl%d: no physical interfaces attached!\n", unit);
goto fail;
}
tl_intvec_adchk((void *)sc, 0);
tl_stop(sc);
/*
* Attempt to clear any stray interrupts
* that may be lurking.
*/
tl_intr((void *)sc);
/*
* Call MI attach routines.
*/
if_attach(ifp);
ether_ifattach(ifp);
#if NBPFILTER > 0
bpfattach(ifp, DLT_EN10MB, sizeof(struct ether_header));
#endif
at_shutdown(tl_shutdown, sc, SHUTDOWN_POST_SYNC);
fail:
splx(s);
return;
}
/*
* Initialize the transmit lists.
*/
static int tl_list_tx_init(sc)
struct tl_softc *sc;
{
struct tl_chain_data *cd;
struct tl_list_data *ld;
int i;
cd = &sc->tl_cdata;
ld = sc->tl_ldata;
for (i = 0; i < TL_TX_LIST_CNT; i++) {
cd->tl_tx_chain[i].tl_ptr = &ld->tl_tx_list[i];
if (i == (TL_TX_LIST_CNT - 1))
cd->tl_tx_chain[i].tl_next = NULL;
else
cd->tl_tx_chain[i].tl_next = &cd->tl_tx_chain[i + 1];
}
cd->tl_tx_free = &cd->tl_tx_chain[0];
cd->tl_tx_tail = cd->tl_tx_head = NULL;
sc->tl_txeoc = 1;
return(0);
}
/*
* Initialize the RX lists and allocate mbufs for them.
*/
static int tl_list_rx_init(sc)
struct tl_softc *sc;
{
struct tl_chain_data *cd;
struct tl_list_data *ld;
int i;
cd = &sc->tl_cdata;
ld = sc->tl_ldata;
for (i = 0; i < TL_RX_LIST_CNT; i++) {
cd->tl_rx_chain[i].tl_ptr =
(struct tl_list_onefrag *)&ld->tl_rx_list[i];
if (tl_newbuf(sc, &cd->tl_rx_chain[i]) == ENOBUFS)
return(ENOBUFS);
if (i == (TL_RX_LIST_CNT - 1)) {
cd->tl_rx_chain[i].tl_next = NULL;
ld->tl_rx_list[i].tlist_fptr = 0;
} else {
cd->tl_rx_chain[i].tl_next = &cd->tl_rx_chain[i + 1];
ld->tl_rx_list[i].tlist_fptr =
vtophys(&ld->tl_rx_list[i + 1]);
}
}
cd->tl_rx_head = &cd->tl_rx_chain[0];
cd->tl_rx_tail = &cd->tl_rx_chain[TL_RX_LIST_CNT - 1];
return(0);
}
static int tl_newbuf(sc, c)
struct tl_softc *sc;
struct tl_chain_onefrag *c;
{
struct mbuf *m_new = NULL;
MGETHDR(m_new, M_DONTWAIT, MT_DATA);
if (m_new == NULL) {
printf("tl%d: no memory for rx list -- packet dropped!",
sc->tl_unit);
return(ENOBUFS);
}
MCLGET(m_new, M_DONTWAIT);
if (!(m_new->m_flags & M_EXT)) {
printf("tl%d: no memory for rx list -- packet dropped!",
sc->tl_unit);
m_freem(m_new);
return(ENOBUFS);
}
c->tl_mbuf = m_new;
c->tl_next = NULL;
c->tl_ptr->tlist_frsize = MCLBYTES;
c->tl_ptr->tlist_cstat = TL_CSTAT_READY;
c->tl_ptr->tlist_fptr = 0;
c->tl_ptr->tl_frag.tlist_dadr = vtophys(mtod(m_new, caddr_t));
c->tl_ptr->tl_frag.tlist_dcnt = MCLBYTES;
return(0);
}
/*
* Interrupt handler for RX 'end of frame' condition (EOF). This
* tells us that a full ethernet frame has been captured and we need
* to handle it.
*
* Reception is done using 'lists' which consist of a header and a
* series of 10 data count/data address pairs that point to buffers.
* Initially you're supposed to create a list, populate it with pointers
* to buffers, then load the physical address of the list into the
* ch_parm register. The adapter is then supposed to DMA the received
* frame into the buffers for you.
*
* To make things as fast as possible, we have the chip DMA directly
* into mbufs. This saves us from having to do a buffer copy: we can
* just hand the mbufs directly to ether_input(). Once the frame has
* been sent on its way, the 'list' structure is assigned a new buffer
* and moved to the end of the RX chain. As long we we stay ahead of
* the chip, it will always think it has an endless receive channel.
*
* If we happen to fall behind and the chip manages to fill up all of
* the buffers, it will generate an end of channel interrupt and wait
* for us to empty the chain and restart the receiver.
*/
static int tl_intvec_rxeof(xsc, type)
void *xsc;
u_int32_t type;
{
struct tl_softc *sc;
int r = 0, total_len = 0;
struct ether_header *eh;
struct mbuf *m;
struct ifnet *ifp;
struct tl_chain_onefrag *cur_rx;
sc = xsc;
ifp = &sc->arpcom.ac_if;
#ifdef TL_DEBUG
evset(sc, EV_RXEOF);
#endif
while(sc->tl_cdata.tl_rx_head->tl_ptr->tlist_cstat & TL_CSTAT_FRAMECMP){
r++;
cur_rx = sc->tl_cdata.tl_rx_head;
sc->tl_cdata.tl_rx_head = cur_rx->tl_next;
m = cur_rx->tl_mbuf;
total_len = cur_rx->tl_ptr->tlist_frsize;
if (tl_newbuf(sc, cur_rx) == ENOBUFS) {
ifp->if_ierrors++;
cur_rx->tl_ptr->tlist_frsize = MCLBYTES;
cur_rx->tl_ptr->tlist_cstat = TL_CSTAT_READY;
cur_rx->tl_ptr->tl_frag.tlist_dcnt = MCLBYTES;
continue;
}
sc->tl_cdata.tl_rx_tail->tl_ptr->tlist_fptr =
vtophys(cur_rx->tl_ptr);
sc->tl_cdata.tl_rx_tail->tl_next = cur_rx;
sc->tl_cdata.tl_rx_tail = cur_rx;
eh = mtod(m, struct ether_header *);
m->m_pkthdr.rcvif = ifp;
/*
* Note: when the ThunderLAN chip is in 'capture all
* frames' mode, it will receive its own transmissions.
* We drop don't need to process our own transmissions,
* so we drop them here and continue.
*/
/*if (ifp->if_flags & IFF_PROMISC && */
if (!bcmp(eh->ether_shost, sc->arpcom.ac_enaddr,
ETHER_ADDR_LEN)) {
m_freem(m);
continue;
}
#if NBPFILTER > 0
/*
* Handle BPF listeners. Let the BPF user see the packet, but
* don't pass it up to the ether_input() layer unless it's
* a broadcast packet, multicast packet, matches our ethernet
* address or the interface is in promiscuous mode. If we don't
* want the packet, just forget it. We leave the mbuf in place
* since it can be used again later.
*/
if (ifp->if_bpf) {
m->m_pkthdr.len = m->m_len = total_len;
bpf_mtap(ifp, m);
if (ifp->if_flags & IFF_PROMISC &&
(bcmp(eh->ether_dhost, sc->arpcom.ac_enaddr,
ETHER_ADDR_LEN) &&
(eh->ether_dhost[0] & 1) == 0)) {
m_freem(m);
continue;
}
}
#endif
/* Remove header from mbuf and pass it on. */
m->m_pkthdr.len = m->m_len =
total_len - sizeof(struct ether_header);
m->m_data += sizeof(struct ether_header);
ether_input(ifp, eh, m);
}
return(r);
}
/*
* The RX-EOC condition hits when the ch_parm address hasn't been
* initialized or the adapter reached a list with a forward pointer
* of 0 (which indicates the end of the chain). In our case, this means
* the card has hit the end of the receive buffer chain and we need to
* empty out the buffers and shift the pointer back to the beginning again.
*/
static int tl_intvec_rxeoc(xsc, type)
void *xsc;
u_int32_t type;
{
struct tl_softc *sc;
int r;
sc = xsc;
#ifdef TL_DEBUG
evset(sc, EV_RXEOC);
#endif
/* Flush out the receive queue and ack RXEOF interrupts. */
r = tl_intvec_rxeof(xsc, type);
CMD_PUT(sc, TL_CMD_ACK | r | (type & ~(0x00100000)));
r = 1;
CSR_WRITE_4(sc, TL_CH_PARM, vtophys(sc->tl_cdata.tl_rx_head->tl_ptr));
r |= (TL_CMD_GO|TL_CMD_RT);
return(r);
}
static int tl_intvec_txeof(xsc, type)
void *xsc;
u_int32_t type;
{
struct tl_softc *sc;
int r = 0;
struct tl_chain *cur_tx;
sc = xsc;
#ifdef TL_DEBUG
evset(sc, EV_TXEOF);
#endif
/*
* Go through our tx list and free mbufs for those
* frames that have been sent.
*/
while (sc->tl_cdata.tl_tx_head != NULL) {
cur_tx = sc->tl_cdata.tl_tx_head;
if (!(cur_tx->tl_ptr->tlist_cstat & TL_CSTAT_FRAMECMP))
break;
sc->tl_cdata.tl_tx_head = cur_tx->tl_next;
r++;
m_freem(cur_tx->tl_mbuf);
cur_tx->tl_mbuf = NULL;
cur_tx->tl_next = sc->tl_cdata.tl_tx_free;
sc->tl_cdata.tl_tx_free = cur_tx;
if (!cur_tx->tl_ptr->tlist_fptr)
break;
}
return(r);
}
/*
* The transmit end of channel interrupt. The adapter triggers this
* interrupt to tell us it hit the end of the current transmit list.
*
* A note about this: it's possible for a condition to arise where
* tl_start() may try to send frames between TXEOF and TXEOC interrupts.
* You have to avoid this since the chip expects things to go in a
* particular order: transmit, acknowledge TXEOF, acknowledge TXEOC.
* When the TXEOF handler is called, it will free all of the transmitted
* frames and reset the tx_head pointer to NULL. However, a TXEOC
* interrupt should be received and acknowledged before any more frames
* are queued for transmission. If tl_statrt() is called after TXEOF
* resets the tx_head pointer but _before_ the TXEOC interrupt arrives,
* it could attempt to issue a transmit command prematurely.
*
* To guard against this, tl_start() will only issue transmit commands
* if the tl_txeoc flag is set, and only the TXEOC interrupt handler
* can set this flag once tl_start() has cleared it.
*/
static int tl_intvec_txeoc(xsc, type)
void *xsc;
u_int32_t type;
{
struct tl_softc *sc;
struct ifnet *ifp;
u_int32_t cmd;
sc = xsc;
ifp = &sc->arpcom.ac_if;
/* Clear the timeout timer. */
ifp->if_timer = 0;
#ifdef TL_DEBUG
evset(sc, EV_TXEOC);
#endif
if (sc->tl_cdata.tl_tx_head == NULL) {
ifp->if_flags &= ~IFF_OACTIVE;
sc->tl_cdata.tl_tx_tail = NULL;
sc->tl_txeoc = 1;
/*
* If we just drained the TX queue and
* there's an autoneg request waiting, set
* it in motion. This will block the transmitter
* until the autoneg session completes which will
* no doubt piss off any processes waiting to
* transmit, but that's the way the ball bounces.
*/
if (sc->tl_want_auto)
tl_autoneg(sc, TL_FLAG_SCHEDDELAY, 1);
} else {
sc->tl_txeoc = 0;
/* First we have to ack the EOC interrupt. */
CMD_PUT(sc, TL_CMD_ACK | 0x00000001 | type);
/* Then load the address of the next TX list. */
CSR_WRITE_4(sc, TL_CH_PARM,
vtophys(sc->tl_cdata.tl_tx_head->tl_ptr));
/* Restart TX channel. */
cmd = CSR_READ_4(sc, TL_HOSTCMD);
cmd &= ~TL_CMD_RT;
cmd |= TL_CMD_GO|TL_CMD_INTSON;
CMD_PUT(sc, cmd);
return(0);
}
return(1);
}
static int tl_intvec_adchk(xsc, type)
void *xsc;
u_int32_t type;
{
struct tl_softc *sc;
u_int16_t bmcr, ctl;
sc = xsc;
if (type)
printf("tl%d: adapter check: %x\n", sc->tl_unit,
CSR_READ_4(sc, TL_CH_PARM));
#ifdef TL_DEBUG
evshow(sc);
#endif
/*
* Before resetting the adapter, try reading the PHY
* settings so we can put them back later. This is
* necessary to keep the chip operating at the same
* speed and duplex settings after the reset completes.
*/
bmcr = tl_phy_readreg(sc, PHY_BMCR);
ctl = tl_phy_readreg(sc, TL_PHY_CTL);
tl_softreset(sc, 1);
tl_phy_writereg(sc, PHY_BMCR, bmcr);
tl_phy_writereg(sc, TL_PHY_CTL, ctl);
if (bmcr & PHY_BMCR_DUPLEX) {
tl_dio_setbit(sc, TL_NETCMD, TL_CMD_DUPLEX);
} else {
tl_dio_clrbit(sc, TL_NETCMD, TL_CMD_DUPLEX);
}
tl_stop(sc);
tl_init(sc);
CMD_SET(sc, TL_CMD_INTSON);
return(0);
}
static int tl_intvec_netsts(xsc, type)
void *xsc;
u_int32_t type;
{
struct tl_softc *sc;
u_int16_t netsts;
sc = xsc;
netsts = tl_dio_read16(sc, TL_NETSTS);
tl_dio_write16(sc, TL_NETSTS, netsts);
printf("tl%d: network status: %x\n", sc->tl_unit, netsts);
return(1);
}
static void tl_intr(xsc)
void *xsc;
{
struct tl_softc *sc;
struct ifnet *ifp;
int r = 0;
u_int32_t type = 0;
u_int16_t ints = 0;
u_int8_t ivec = 0;
sc = xsc;
/* Disable interrupts */
ints = CSR_READ_2(sc, TL_HOST_INT);
CSR_WRITE_2(sc, TL_HOST_INT, ints);
type = (ints << 16) & 0xFFFF0000;
ivec = (ints & TL_VEC_MASK) >> 5;
ints = (ints & TL_INT_MASK) >> 2;
ifp = &sc->arpcom.ac_if;
switch(ints) {
case (TL_INTR_INVALID):
#ifdef DIAGNOSTIC
printf("tl%d: got an invalid interrupt!\n", sc->tl_unit);
#endif
/* Re-enable interrupts but don't ack this one. */
CMD_PUT(sc, type);
r = 0;
break;
case (TL_INTR_TXEOF):
r = tl_intvec_txeof((void *)sc, type);
break;
case (TL_INTR_TXEOC):
r = tl_intvec_txeoc((void *)sc, type);
break;
case (TL_INTR_STATOFLOW):
tl_stats_update(sc);
r = 1;
break;
case (TL_INTR_RXEOF):
r = tl_intvec_rxeof((void *)sc, type);
break;
case (TL_INTR_DUMMY):
printf("tl%d: got a dummy interrupt\n", sc->tl_unit);
r = 1;
break;
case (TL_INTR_ADCHK):
if (ivec)
r = tl_intvec_adchk((void *)sc, type);
else
r = tl_intvec_netsts((void *)sc, type);
break;
case (TL_INTR_RXEOC):
r = tl_intvec_rxeoc((void *)sc, type);
break;
default:
printf("tl%d: bogus interrupt type\n", ifp->if_unit);
break;
}
/* Re-enable interrupts */
if (r) {
CMD_PUT(sc, TL_CMD_ACK | r | type);
}
if (ifp->if_snd.ifq_head != NULL)
tl_start(ifp);
return;
}
static void tl_stats_update(xsc)
void *xsc;
{
struct tl_softc *sc;
struct ifnet *ifp;
struct tl_stats tl_stats;
u_int32_t *p;
bzero((char *)&tl_stats, sizeof(struct tl_stats));
sc = xsc;
ifp = &sc->arpcom.ac_if;
p = (u_int32_t *)&tl_stats;
CSR_WRITE_2(sc, TL_DIO_ADDR, TL_TXGOODFRAMES|TL_DIO_ADDR_INC);
*p++ = CSR_READ_4(sc, TL_DIO_DATA);
*p++ = CSR_READ_4(sc, TL_DIO_DATA);
*p++ = CSR_READ_4(sc, TL_DIO_DATA);
*p++ = CSR_READ_4(sc, TL_DIO_DATA);
*p++ = CSR_READ_4(sc, TL_DIO_DATA);
ifp->if_opackets += tl_tx_goodframes(tl_stats);
ifp->if_collisions += tl_stats.tl_tx_single_collision +
tl_stats.tl_tx_multi_collision;
ifp->if_ipackets += tl_rx_goodframes(tl_stats);
ifp->if_ierrors += tl_stats.tl_crc_errors + tl_stats.tl_code_errors +
tl_rx_overrun(tl_stats);
ifp->if_oerrors += tl_tx_underrun(tl_stats);
sc->tl_stat_ch = timeout(tl_stats_update, sc, hz);
return;
}
/*
* Encapsulate an mbuf chain in a list by coupling the mbuf data
* pointers to the fragment pointers.
*/
static int tl_encap(sc, c, m_head)
struct tl_softc *sc;
struct tl_chain *c;
struct mbuf *m_head;
{
int frag = 0;
struct tl_frag *f = NULL;
int total_len;
struct mbuf *m;
/*
* Start packing the mbufs in this chain into
* the fragment pointers. Stop when we run out
* of fragments or hit the end of the mbuf chain.
*/
m = m_head;
total_len = 0;
for (m = m_head, frag = 0; m != NULL; m = m->m_next) {
if (m->m_len != 0) {
if (frag == TL_MAXFRAGS)
break;
total_len+= m->m_len;
c->tl_ptr->tl_frag[frag].tlist_dadr =
vtophys(mtod(m, vm_offset_t));
c->tl_ptr->tl_frag[frag].tlist_dcnt = m->m_len;
frag++;
}
}
/*
* Handle special cases.
* Special case #1: we used up all 10 fragments, but
* we have more mbufs left in the chain. Copy the
* data into an mbuf cluster. Note that we don't
* bother clearing the values in the other fragment
* pointers/counters; it wouldn't gain us anything,
* and would waste cycles.
*/
if (m != NULL) {
struct mbuf *m_new = NULL;
MGETHDR(m_new, M_DONTWAIT, MT_DATA);
if (m_new == NULL) {
printf("tl%d: no memory for tx list", sc->tl_unit);
return(1);
}
if (m_head->m_pkthdr.len > MHLEN) {
MCLGET(m_new, M_DONTWAIT);
if (!(m_new->m_flags & M_EXT)) {
m_freem(m_new);
printf("tl%d: no memory for tx list",
sc->tl_unit);
return(1);
}
}
m_copydata(m_head, 0, m_head->m_pkthdr.len,
mtod(m_new, caddr_t));
m_new->m_pkthdr.len = m_new->m_len = m_head->m_pkthdr.len;
m_freem(m_head);
m_head = m_new;
f = &c->tl_ptr->tl_frag[0];
f->tlist_dadr = vtophys(mtod(m_new, caddr_t));
f->tlist_dcnt = total_len = m_new->m_len;
frag = 1;
}
/*
* Special case #2: the frame is smaller than the minimum
* frame size. We have to pad it to make the chip happy.
*/
if (total_len < TL_MIN_FRAMELEN) {
if (frag == TL_MAXFRAGS)
printf("tl%d: all frags filled but "
"frame still to small!\n", sc->tl_unit);
f = &c->tl_ptr->tl_frag[frag];
f->tlist_dcnt = TL_MIN_FRAMELEN - total_len;
f->tlist_dadr = vtophys(&sc->tl_ldata->tl_pad);
total_len += f->tlist_dcnt;
frag++;
}
c->tl_mbuf = m_head;
c->tl_ptr->tl_frag[frag - 1].tlist_dcnt |= TL_LAST_FRAG;
c->tl_ptr->tlist_frsize = total_len;
c->tl_ptr->tlist_cstat = TL_CSTAT_READY;
c->tl_ptr->tlist_fptr = 0;
return(0);
}
/*
* Main transmit routine. To avoid having to do mbuf copies, we put pointers
* to the mbuf data regions directly in the transmit lists. We also save a
* copy of the pointers since the transmit list fragment pointers are
* physical addresses.
*/
static void tl_start(ifp)
struct ifnet *ifp;
{
struct tl_softc *sc;
struct mbuf *m_head = NULL;
u_int32_t cmd;
struct tl_chain *prev = NULL, *cur_tx = NULL, *start_tx;
sc = ifp->if_softc;
if (sc->tl_autoneg) {
sc->tl_tx_pend = 1;
return;
}
/*
* Check for an available queue slot. If there are none,
* punt.
*/
if (sc->tl_cdata.tl_tx_free == NULL) {
ifp->if_flags |= IFF_OACTIVE;
return;
}
start_tx = sc->tl_cdata.tl_tx_free;
while(sc->tl_cdata.tl_tx_free != NULL) {
IF_DEQUEUE(&ifp->if_snd, m_head);
if (m_head == NULL)
break;
/* Pick a chain member off the free list. */
cur_tx = sc->tl_cdata.tl_tx_free;
sc->tl_cdata.tl_tx_free = cur_tx->tl_next;
cur_tx->tl_next = NULL;
/* Pack the data into the list. */
tl_encap(sc, cur_tx, m_head);
/* Chain it together */
if (prev != NULL) {
prev->tl_next = cur_tx;
prev->tl_ptr->tlist_fptr = vtophys(cur_tx->tl_ptr);
}
prev = cur_tx;
/*
* If there's a BPF listener, bounce a copy of this frame
* to him.
*/
#if NBPFILTER > 0
if (ifp->if_bpf)
bpf_mtap(ifp, cur_tx->tl_mbuf);
#endif
}
/*
* That's all we can stands, we can't stands no more.
* If there are no other transfers pending, then issue the
* TX GO command to the adapter to start things moving.
* Otherwise, just leave the data in the queue and let
* the EOF/EOC interrupt handler send.
*/
if (sc->tl_cdata.tl_tx_head == NULL) {
sc->tl_cdata.tl_tx_head = start_tx;
sc->tl_cdata.tl_tx_tail = cur_tx;
#ifdef TL_DEBUG
evset(sc, EV_START_TX);
#endif
if (sc->tl_txeoc) {
#ifdef TL_DEBUG
evset(sc, EV_START_TX_REAL);
#endif
sc->tl_txeoc = 0;
CSR_WRITE_4(sc, TL_CH_PARM, vtophys(start_tx->tl_ptr));
cmd = CSR_READ_4(sc, TL_HOSTCMD);
cmd &= ~TL_CMD_RT;
cmd |= TL_CMD_GO|TL_CMD_INTSON;
CMD_PUT(sc, cmd);
}
} else {
#ifdef TL_DEBUG
evset(sc, EV_START_Q);
#endif
sc->tl_cdata.tl_tx_tail->tl_next = start_tx;
sc->tl_cdata.tl_tx_tail = start_tx;
}
/*
* Set a timeout in case the chip goes out to lunch.
*/
ifp->if_timer = 5;
return;
}
static void tl_init(xsc)
void *xsc;
{
struct tl_softc *sc = xsc;
struct ifnet *ifp = &sc->arpcom.ac_if;
int s;
u_int16_t phy_sts;
if (sc->tl_autoneg)
return;
s = splimp();
ifp = &sc->arpcom.ac_if;
#ifdef TL_DEBUG
evset(sc, EV_INIT);
#endif
/*
* Cancel pending I/O.
*/
tl_stop(sc);
/*
* Set 'capture all frames' bit for promiscuous mode.
*/
if (ifp->if_flags & IFF_PROMISC)
tl_dio_setbit(sc, TL_NETCMD, TL_CMD_CAF);
else
tl_dio_clrbit(sc, TL_NETCMD, TL_CMD_CAF);
/*
* Set capture broadcast bit to capture broadcast frames.
*/
if (ifp->if_flags & IFF_BROADCAST)
tl_dio_clrbit(sc, TL_NETCMD, TL_CMD_NOBRX);
else
tl_dio_setbit(sc, TL_NETCMD, TL_CMD_NOBRX);
/* Init our MAC address */
tl_setfilt(sc, sc->arpcom.ac_enaddr, 0);
/* Init multicast filter, if needed. */
tl_setmulti(sc);
/* Init circular RX list. */
if (tl_list_rx_init(sc) == ENOBUFS) {
printf("tl%d: initialization failed: no "
"memory for rx buffers\n", sc->tl_unit);
tl_stop(sc);
return;
}
/* Init TX pointers. */
tl_list_tx_init(sc);
/*
* Enable PHY interrupts.
*/
phy_sts = tl_phy_readreg(sc, TL_PHY_CTL);
phy_sts |= PHY_CTL_INTEN;
tl_phy_writereg(sc, TL_PHY_CTL, phy_sts);
/* Enable MII interrupts. */
tl_dio_setbit(sc, TL_NETSIO, TL_SIO_MINTEN);
/* Enable PCI interrupts. */
CMD_SET(sc, TL_CMD_INTSON);
/* Load the address of the rx list */
CMD_SET(sc, TL_CMD_RT);
CSR_WRITE_4(sc, TL_CH_PARM, vtophys(&sc->tl_ldata->tl_rx_list[0]));
/*
* XXX This is a kludge to handle adapters with the Micro Linear
* ML6692 100BaseTX PHY, which only supports 100Mbps modes and
* relies on the controller's internal 10Mbps PHY to provide
* 10Mbps modes. The ML6692 always shows up with a vendor/device ID
* of 0 (it doesn't actually have vendor/device ID registers)
* so we use that property to detect it. In theory there ought to
* be a better way to 'spot the looney' but I can't find one.
*/
if (!sc->tl_phy_vid) {
u_int8_t addr = 0;
u_int16_t bmcr;
bmcr = tl_phy_readreg(sc, PHY_BMCR);
addr = sc->tl_phy_addr;
sc->tl_phy_addr = TL_PHYADDR_MAX;
tl_phy_writereg(sc, PHY_BMCR, PHY_BMCR_RESET);
if (bmcr & PHY_BMCR_SPEEDSEL)
tl_phy_writereg(sc, PHY_BMCR, PHY_BMCR_ISOLATE);
else
tl_phy_writereg(sc, PHY_BMCR, bmcr);
sc->tl_phy_addr = addr;
}
/* Send the RX go command */
CMD_SET(sc, TL_CMD_GO|TL_CMD_RT);
ifp->if_flags |= IFF_RUNNING;
ifp->if_flags &= ~IFF_OACTIVE;
(void)splx(s);
/* Start the stats update counter */
sc->tl_stat_ch = timeout(tl_stats_update, sc, hz);
return;
}
/*
* Set media options.
*/
static int tl_ifmedia_upd(ifp)
struct ifnet *ifp;
{
struct tl_softc *sc;
struct ifmedia *ifm;
sc = ifp->if_softc;
ifm = &sc->ifmedia;
if (IFM_TYPE(ifm->ifm_media) != IFM_ETHER)
return(EINVAL);
if (IFM_SUBTYPE(ifm->ifm_media) == IFM_AUTO)
tl_autoneg(sc, TL_FLAG_SCHEDDELAY, 1);
else
tl_setmode(sc, ifm->ifm_media);
return(0);
}
/*
* Report current media status.
*/
static void tl_ifmedia_sts(ifp, ifmr)
struct ifnet *ifp;
struct ifmediareq *ifmr;
{
u_int16_t phy_ctl;
u_int16_t phy_sts;
struct tl_softc *sc;
sc = ifp->if_softc;
ifmr->ifm_active = IFM_ETHER;
phy_ctl = tl_phy_readreg(sc, PHY_BMCR);
phy_sts = tl_phy_readreg(sc, TL_PHY_CTL);
if (phy_sts & PHY_CTL_AUISEL)
ifmr->ifm_active = IFM_ETHER|IFM_10_5;
if (phy_ctl & PHY_BMCR_LOOPBK)
ifmr->ifm_active = IFM_ETHER|IFM_LOOP;
if (phy_ctl & PHY_BMCR_SPEEDSEL)
ifmr->ifm_active = IFM_ETHER|IFM_100_TX;
else
ifmr->ifm_active = IFM_ETHER|IFM_10_T;
if (phy_ctl & PHY_BMCR_DUPLEX) {
ifmr->ifm_active |= IFM_FDX;
ifmr->ifm_active &= ~IFM_HDX;
} else {
ifmr->ifm_active &= ~IFM_FDX;
ifmr->ifm_active |= IFM_HDX;
}
return;
}
static int tl_ioctl(ifp, command, data)
struct ifnet *ifp;
u_long command;
caddr_t data;
{
struct tl_softc *sc = ifp->if_softc;
struct ifreq *ifr = (struct ifreq *) data;
int s, error = 0;
s = splimp();
switch(command) {
case SIOCSIFADDR:
case SIOCGIFADDR:
case SIOCSIFMTU:
error = ether_ioctl(ifp, command, data);
break;
case SIOCSIFFLAGS:
if (ifp->if_flags & IFF_UP) {
tl_init(sc);
} else {
if (ifp->if_flags & IFF_RUNNING) {
tl_stop(sc);
}
}
error = 0;
break;
case SIOCADDMULTI:
case SIOCDELMULTI:
tl_setmulti(sc);
error = 0;
break;
case SIOCSIFMEDIA:
case SIOCGIFMEDIA:
error = ifmedia_ioctl(ifp, ifr, &sc->ifmedia, command);
break;
default:
error = EINVAL;
break;
}
(void)splx(s);
return(error);
}
static void tl_watchdog(ifp)
struct ifnet *ifp;
{
struct tl_softc *sc;
u_int16_t bmsr;
sc = ifp->if_softc;
#ifdef TL_DEBUG
evset(sc, EV_WATCHDOG);
#endif
if (sc->tl_autoneg) {
tl_autoneg(sc, TL_FLAG_DELAYTIMEO, 1);
return;
}
/* Check that we're still connected. */
tl_phy_readreg(sc, PHY_BMSR);
bmsr = tl_phy_readreg(sc, PHY_BMSR);
if (!(bmsr & PHY_BMSR_LINKSTAT)) {
printf("tl%d: no carrier\n", sc->tl_unit);
tl_autoneg(sc, TL_FLAG_SCHEDDELAY, 1);
} else
printf("tl%d: device timeout\n", sc->tl_unit);
ifp->if_oerrors++;
tl_init(sc);
return;
}
/*
* Stop the adapter and free any mbufs allocated to the
* RX and TX lists.
*/
static void tl_stop(sc)
struct tl_softc *sc;
{
register int i;
struct ifnet *ifp;
ifp = &sc->arpcom.ac_if;
/* Stop the stats updater. */
untimeout(tl_stats_update, sc, sc->tl_stat_ch);
/* Stop the transmitter */
CMD_CLR(sc, TL_CMD_RT);
CMD_SET(sc, TL_CMD_STOP);
CSR_WRITE_4(sc, TL_CH_PARM, 0);
/* Stop the receiver */
CMD_SET(sc, TL_CMD_RT);
CMD_SET(sc, TL_CMD_STOP);
CSR_WRITE_4(sc, TL_CH_PARM, 0);
/*
* Disable host interrupts.
*/
CMD_SET(sc, TL_CMD_INTSOFF);
/*
* Disable MII interrupts.
*/
tl_dio_clrbit(sc, TL_NETSIO, TL_SIO_MINTEN);
/*
* Clear list pointer.
*/
CSR_WRITE_4(sc, TL_CH_PARM, 0);
/*
* Free the RX lists.
*/
for (i = 0; i < TL_RX_LIST_CNT; i++) {
if (sc->tl_cdata.tl_rx_chain[i].tl_mbuf != NULL) {
m_freem(sc->tl_cdata.tl_rx_chain[i].tl_mbuf);
sc->tl_cdata.tl_rx_chain[i].tl_mbuf = NULL;
}
}
bzero((char *)&sc->tl_ldata->tl_rx_list,
sizeof(sc->tl_ldata->tl_rx_list));
/*
* Free the TX list buffers.
*/
for (i = 0; i < TL_TX_LIST_CNT; i++) {
if (sc->tl_cdata.tl_tx_chain[i].tl_mbuf != NULL) {
m_freem(sc->tl_cdata.tl_tx_chain[i].tl_mbuf);
sc->tl_cdata.tl_tx_chain[i].tl_mbuf = NULL;
}
}
bzero((char *)&sc->tl_ldata->tl_tx_list,
sizeof(sc->tl_ldata->tl_tx_list));
ifp->if_flags &= ~(IFF_RUNNING | IFF_OACTIVE);
return;
}
/*
* Stop all chip I/O so that the kernel's probe routines don't
* get confused by errant DMAs when rebooting.
*/
static void tl_shutdown(howto, xsc)
int howto;
void *xsc;
{
struct tl_softc *sc;
sc = xsc;
tl_stop(sc);
return;
}
static struct pci_device tl_device = {
"tl",
tl_probe,
tl_attach,
&tl_count,
NULL
};
DATA_SET(pcidevice_set, tl_device);
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