196f2e892SBill Paul.\" Copyright (c) 1997, 1998, 1999 296f2e892SBill Paul.\" Bill Paul <wpaul@ee.columbia.edu>. All rights reserved. 396f2e892SBill Paul.\" 496f2e892SBill Paul.\" Redistribution and use in source and binary forms, with or without 596f2e892SBill Paul.\" modification, are permitted provided that the following conditions 696f2e892SBill Paul.\" are met: 796f2e892SBill Paul.\" 1. Redistributions of source code must retain the above copyright 896f2e892SBill Paul.\" notice, this list of conditions and the following disclaimer. 996f2e892SBill Paul.\" 2. Redistributions in binary form must reproduce the above copyright 1096f2e892SBill Paul.\" notice, this list of conditions and the following disclaimer in the 1196f2e892SBill Paul.\" documentation and/or other materials provided with the distribution. 1296f2e892SBill Paul.\" 3. All advertising materials mentioning features or use of this software 1396f2e892SBill Paul.\" must display the following acknowledgement: 1496f2e892SBill Paul.\" This product includes software developed by Bill Paul. 1596f2e892SBill Paul.\" 4. Neither the name of the author nor the names of any co-contributors 1696f2e892SBill Paul.\" may be used to endorse or promote products derived from this software 1796f2e892SBill Paul.\" without specific prior written permission. 1896f2e892SBill Paul.\" 1996f2e892SBill Paul.\" THIS SOFTWARE IS PROVIDED BY Bill Paul AND CONTRIBUTORS ``AS IS'' AND 2096f2e892SBill Paul.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 2196f2e892SBill Paul.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 2296f2e892SBill Paul.\" ARE DISCLAIMED. IN NO EVENT SHALL Bill Paul OR THE VOICES IN HIS HEAD 2396f2e892SBill Paul.\" BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 2496f2e892SBill Paul.\" CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 2596f2e892SBill Paul.\" SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 2696f2e892SBill Paul.\" INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 2796f2e892SBill Paul.\" CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 2896f2e892SBill Paul.\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 2996f2e892SBill Paul.\" THE POSSIBILITY OF SUCH DAMAGE. 3096f2e892SBill Paul.\" 3196f2e892SBill Paul.\" $FreeBSD$ 3296f2e892SBill Paul.\" 3386e3186eSTom Rhodes.Dd July 16, 2005 344c574bfdSRuslan Ermilov.Dt DC 4 353d45e180SRuslan Ermilov.Os 3696f2e892SBill Paul.Sh NAME 3796f2e892SBill Paul.Nm dc 3883e76ab9SMarius Strobl.Nd "DEC/Intel 21143 and clone 10/100 Ethernet driver" 3996f2e892SBill Paul.Sh SYNOPSIS 4086e3186eSTom RhodesTo compile support for the 4186e3186eSTom Rhodes.Nm 4290296834STom Rhodesdriver into your kernel, place the following lines in your 4390296834STom Rhodeskernel configuration file: 4486e3186eSTom Rhodes.Bd -ragged -offset indent 456b713d58SJeroen Ruigrok van der Werven.Cd "device miibus" 466b713d58SJeroen Ruigrok van der Werven.Cd "device dc" 4786e3186eSTom Rhodes.Ed 4886e3186eSTom Rhodes.Pp 4986e3186eSTom RhodesAlternatively, to load the 5086e3186eSTom Rhodes.Nm 5186e3186eSTom Rhodesdriver at boot time, place the following line in 5286e3186eSTom Rhodes.Xr loader.conf 5 : 5386e3186eSTom Rhodes.Bd -literal -offset indent 5486e3186eSTom Rhodesif_dc_load="YES" 5586e3186eSTom Rhodes.Ed 5696f2e892SBill Paul.Sh DESCRIPTION 5796f2e892SBill PaulThe 5896f2e892SBill Paul.Nm 5983e76ab9SMarius Strobldriver provides support for several PCI Fast Ethernet adapters and 605f9bc185SSimon L. B. Nielsenembedded controllers based on the the DEC/Intel 21143 chipset and clones. 6196f2e892SBill Paul.Pp 625f9bc185SSimon L. B. NielsenAll of supported chipsets have the same general register layout, DMA 636d249eeeSSheldon Hearndescriptor format and method of operation. 646d249eeeSSheldon HearnAll of the clone chips 656d249eeeSSheldon Hearnare based on the 21143 design with various modifications. 666d249eeeSSheldon HearnThe 6796f2e892SBill Paul21143 itself has support for 10baseT, BNC, AUI, MII and symbol 6896f2e892SBill Paulmedia attachments, 10 and 100Mbps speeds in full or half duplex, 696d249eeeSSheldon Hearnbuilt in NWAY autonegotiation and wake on LAN. 706d249eeeSSheldon HearnThe 21143 also 7196f2e892SBill Pauloffers several receive filter programming options including 7296f2e892SBill Paulperfect filtering, inverse perfect filtering and hash table 7396f2e892SBill Paulfiltering. 7496f2e892SBill Paul.Pp 7596f2e892SBill PaulSome clone chips duplicate the 21143 fairly closely while others 76f444a4c5SDima Dorfmanonly maintain superficial similarities. 776d249eeeSSheldon HearnSome support only MII 786d249eeeSSheldon Hearnmedia attachments. 796d249eeeSSheldon HearnOthers use different receiver filter programming 806d249eeeSSheldon Hearnmechanisms. 816d249eeeSSheldon HearnAt least one supports only chained DMA descriptors 8296f2e892SBill Paul(most support both chained descriptors and contiguously allocated 835203edcdSRuslan Ermilovfixed size rings). 845203edcdSRuslan ErmilovSome chips (especially the PNIC) also have 856d249eeeSSheldon Hearnpeculiar bugs. 866d249eeeSSheldon HearnThe 8796f2e892SBill Paul.Nm 8896f2e892SBill Pauldriver does its best to provide generalized support for all 89f87717faSMike Pritchardof these chipsets in order to keep special case code to a minimum. 9096f2e892SBill Paul.Pp 9196f2e892SBill PaulThese chips are used by many vendors which makes it 92f444a4c5SDima Dorfmandifficult to provide a complete list of all supported cards. 9396f2e892SBill Paul.Pp 9496f2e892SBill PaulThe 9596f2e892SBill Paul.Nm 9696f2e892SBill Pauldriver supports the following media types: 9796f2e892SBill Paul.Pp 98da2fa159SRuslan Ermilov.Bl -tag -width ".Cm 10baseT/UTP" 99da2fa159SRuslan Ermilov.It Cm autoselect 10096f2e892SBill PaulEnable autoselection of the media type and options. 10196f2e892SBill PaulThe user can manually override 10296f2e892SBill Paulthe autoselected mode by adding media options to the 10396f2e892SBill Paul.Pa /etc/rc.conf 10496f2e892SBill Paulfile. 10596f2e892SBill Paul.Pp 10696f2e892SBill PaulNote: the built-in NWAY autonegotiation on the original PNIC 82c168 10796f2e892SBill Paulchip is horribly broken and is not supported by the 10896f2e892SBill Paul.Nm 109f444a4c5SDima Dorfmandriver at this time (see the 110f444a4c5SDima Dorfman.Sx BUGS 111f444a4c5SDima Dorfmansection for details). 1126d249eeeSSheldon HearnThe original 82c168 appears 11396f2e892SBill Paulon very early revisions of the LinkSys LNE100TX and Matrox FastNIC. 114da2fa159SRuslan Ermilov.It Cm 10baseT/UTP 1156d249eeeSSheldon HearnSet 10Mbps operation. 1166d249eeeSSheldon HearnThe 117da2fa159SRuslan Ermilov.Cm mediaopt 11896f2e892SBill Pauloption can also be used to enable 119da2fa159SRuslan Ermilov.Cm full-duplex 1206d249eeeSSheldon Hearnoperation. 1216d249eeeSSheldon HearnNot specifying 122da2fa159SRuslan Ermilov.Cm full-duplex 12396f2e892SBill Paulimplies 124da2fa159SRuslan Ermilov.Cm half-duplex 12596f2e892SBill Paulmode. 126da2fa159SRuslan Ermilov.It Cm 100baseTX 12783e76ab9SMarius StroblSet 100Mbps (Fast Ethernet) operation. 1286d249eeeSSheldon HearnThe 129da2fa159SRuslan Ermilov.Cm mediaopt 13096f2e892SBill Pauloption can also be used to enable 131da2fa159SRuslan Ermilov.Cm full-duplex 1326d249eeeSSheldon Hearnoperation. 1336d249eeeSSheldon HearnNot specifying 134da2fa159SRuslan Ermilov.Cm full-duplex 13596f2e892SBill Paulimplies 136da2fa159SRuslan Ermilov.Cm half-duplex 13796f2e892SBill Paulmode. 13896f2e892SBill Paul.El 13996f2e892SBill Paul.Pp 14096f2e892SBill PaulThe 14196f2e892SBill Paul.Nm 14296f2e892SBill Pauldriver supports the following media options: 14396f2e892SBill Paul.Pp 144da2fa159SRuslan Ermilov.Bl -tag -width ".Cm full-duplex" 145da2fa159SRuslan Ermilov.It Cm full-duplex 1466d249eeeSSheldon HearnForce full duplex operation. 1476d249eeeSSheldon HearnThe interface will operate in 14896f2e892SBill Paulhalf duplex mode if this media option is not specified. 14996f2e892SBill Paul.El 15096f2e892SBill Paul.Pp 15196f2e892SBill PaulNote that the 100baseTX media type may not be available on certain 1521d705c5cSColin PercivalIntel 21143 adapters which support 10Mbps media attachments only. 15396f2e892SBill PaulFor more information on configuring this device, see 15496f2e892SBill Paul.Xr ifconfig 8 . 1555f9bc185SSimon L. B. Nielsen.Sh HARDWARE 1565f9bc185SSimon L. B. NielsenThe 1575f9bc185SSimon L. B. Nielsen.Nm 1585f9bc185SSimon L. B. Nielsendriver provides support for the following chipsets: 1595f9bc185SSimon L. B. Nielsen.Pp 1605f9bc185SSimon L. B. Nielsen.Bl -bullet -compact 1615f9bc185SSimon L. B. Nielsen.It 1625f9bc185SSimon L. B. NielsenDEC/Intel 21143 1635f9bc185SSimon L. B. Nielsen.It 1645f9bc185SSimon L. B. NielsenADMtek AL981 Comet, AN985 Centaur, ADM9511 Centaur II and ADM9513 1655f9bc185SSimon L. B. NielsenCentaur II 1665f9bc185SSimon L. B. Nielsen.It 1675f9bc185SSimon L. B. NielsenASIX Electronics AX88140A and AX88141 1685f9bc185SSimon L. B. Nielsen.It 1695f9bc185SSimon L. B. NielsenConexant LANfinity RS7112 (miniPCI) 1705f9bc185SSimon L. B. Nielsen.It 1715f9bc185SSimon L. B. NielsenDavicom DM9009, DM9100, DM9102 and DM9102A 1725f9bc185SSimon L. B. Nielsen.It 1735f9bc185SSimon L. B. NielsenLite-On 82c168 and 82c169 PNIC 1745f9bc185SSimon L. B. Nielsen.It 1755f9bc185SSimon L. B. NielsenLite-On/Macronix 82c115 PNIC II 1765f9bc185SSimon L. B. Nielsen.It 1775f9bc185SSimon L. B. NielsenMacronix 98713, 98713A, 98715, 98715A, 98715AEC-C, 98725, 98727 and 98732 1785f9bc185SSimon L. B. Nielsen.It 1795f9bc185SSimon L. B. NielsenXircom X3201 (cardbus only) 1805f9bc185SSimon L. B. Nielsen.El 1815f9bc185SSimon L. B. Nielsen.Pp 1825f9bc185SSimon L. B. NielsenThe 1835f9bc185SSimon L. B. Nielsenfollowing NICs are known to work with the 1845f9bc185SSimon L. B. Nielsen.Nm 1855f9bc185SSimon L. B. Nielsendriver at this time: 1865f9bc185SSimon L. B. Nielsen.Pp 1875f9bc185SSimon L. B. Nielsen.Bl -bullet -compact 1885f9bc185SSimon L. B. Nielsen.It 1895f9bc185SSimon L. B. Nielsen3Com OfficeConnect 10/100B (ADMtek AN985 Centaur-P) 1905f9bc185SSimon L. B. Nielsen.It 1915f9bc185SSimon L. B. NielsenAbocom FE2500 1925f9bc185SSimon L. B. Nielsen.It 1935f9bc185SSimon L. B. NielsenAccton EN1217 (98715A) 1945f9bc185SSimon L. B. Nielsen.It 1955f9bc185SSimon L. B. NielsenAccton EN2242 MiniPCI 1965f9bc185SSimon L. B. Nielsen.It 1975f9bc185SSimon L. B. NielsenAdico AE310TX (98715A) 1985f9bc185SSimon L. B. Nielsen.It 1995f9bc185SSimon L. B. NielsenAlfa Inc GFC2204 (ASIX AX88140A) 2005f9bc185SSimon L. B. Nielsen.It 2015f9bc185SSimon L. B. NielsenBuilt in 10Mbps only Ethernet on Compaq Presario 7900 series 2025f9bc185SSimon L. B. Nielsendesktops (21143, non-MII) 2035f9bc185SSimon L. B. Nielsen.It 2045f9bc185SSimon L. B. NielsenBuilt in DE500-BA on DEC Alpha workstations (21143, non-MII) 2055f9bc185SSimon L. B. Nielsen.It 2065f9bc185SSimon L. B. NielsenBuilt in Sun DMFE 10/100 Mbps Ethernet on Sun Netra X1 and Sun Fire V100 2075f9bc185SSimon L. B. Nielsen(DM9102A, MII) 2085f9bc185SSimon L. B. Nielsen.It 2095f9bc185SSimon L. B. NielsenBuilt in Ethernet on LinkSys EtherFast 10/100 Instant GigaDrive (DM9102, MII) 2105f9bc185SSimon L. B. Nielsen.It 2115f9bc185SSimon L. B. NielsenCNet Pro110B (ASIX AX88140A) 2125f9bc185SSimon L. B. Nielsen.It 2135f9bc185SSimon L. B. NielsenCNet Pro120A (98715A or 98713A) and CNet Pro120B (98715) 2145f9bc185SSimon L. B. Nielsen.It 2155f9bc185SSimon L. B. NielsenCompex RL100-TX (98713 or 98713A) 2165f9bc185SSimon L. B. Nielsen.It 2175f9bc185SSimon L. B. NielsenD-Link DFE-570TX (21143, MII, quad port) 2185f9bc185SSimon L. B. Nielsen.It 2195f9bc185SSimon L. B. NielsenDigital DE500-BA 10/100 (21143, non-MII) 2205f9bc185SSimon L. B. Nielsen.It 2215f9bc185SSimon L. B. NielsenELECOM Laneed LD-CBL/TXA (ADMtek AN985) 2225f9bc185SSimon L. B. Nielsen.It 2235f9bc185SSimon L. B. NielsenHawking CB102 CardBus 2245f9bc185SSimon L. B. Nielsen.It 2255f9bc185SSimon L. B. NielsenIBM EtherJet Cardbus Adapter 2265f9bc185SSimon L. B. Nielsen.It 2275f9bc185SSimon L. B. NielsenIntel PRO/100 Mobile Cardbus (versions that use the X3201 chipset) 2285f9bc185SSimon L. B. Nielsen.It 2295f9bc185SSimon L. B. NielsenJaton XpressNet (Davicom DM9102) 2305f9bc185SSimon L. B. Nielsen.It 2315f9bc185SSimon L. B. NielsenKingston KNE100TX (21143, MII) 2325f9bc185SSimon L. B. Nielsen.It 2335f9bc185SSimon L. B. NielsenKingston KNE110TX (PNIC 82c169) 2345f9bc185SSimon L. B. Nielsen.It 2355f9bc185SSimon L. B. NielsenLinkSys LNE100TX (PNIC 82c168, 82c169) 2365f9bc185SSimon L. B. Nielsen.It 2375f9bc185SSimon L. B. NielsenLinkSys LNE100TX v2.0 (PNIC II 82c115) 2385f9bc185SSimon L. B. Nielsen.It 2395f9bc185SSimon L. B. NielsenLinkSys LNE100TX v4.0/4.1 (ADMtek AN985 Centaur-P) 2405f9bc185SSimon L. B. Nielsen.It 2415f9bc185SSimon L. B. NielsenMatrox FastNIC 10/100 (PNIC 82c168, 82c169) 2425f9bc185SSimon L. B. Nielsen.It 2435f9bc185SSimon L. B. NielsenMelco LGY-PCI-TXL 2445f9bc185SSimon L. B. Nielsen.It 2455f9bc185SSimon L. B. NielsenMicrosoft MN-120 10/100 CardBus (ADMTek Centaur-C) 2465f9bc185SSimon L. B. Nielsen.It 2475f9bc185SSimon L. B. NielsenMicrosoft MN-130 10/100 PCI (ADMTek Centaur-P) 2485f9bc185SSimon L. B. Nielsen.It 2495f9bc185SSimon L. B. NielsenNDC SOHOware SFA110A (98713A) 2505f9bc185SSimon L. B. Nielsen.It 2515f9bc185SSimon L. B. NielsenNDC SOHOware SFA110A Rev B4 (98715AEC-C) 2525f9bc185SSimon L. B. Nielsen.It 2535f9bc185SSimon L. B. NielsenNetGear FA310-TX Rev.\& D1, D2 or D3 (PNIC 82c169) 2545f9bc185SSimon L. B. Nielsen.It 2555f9bc185SSimon L. B. NielsenNetgear FA511 2565f9bc185SSimon L. B. Nielsen.It 2575f9bc185SSimon L. B. NielsenPlaneX FNW-3602-T (ADMtek AN985) 2585f9bc185SSimon L. B. Nielsen.It 259889cd9b2SChristian BruefferSMC EZ Card 10/100 1233A-TX (ADMtek AN985) 260e674bff8SChristian Brueffer.It 2615f9bc185SSimon L. B. NielsenSVEC PN102-TX (98713) 2625f9bc185SSimon L. B. Nielsen.It 2635f9bc185SSimon L. B. NielsenXircom Cardbus Realport 2645f9bc185SSimon L. B. Nielsen.It 2655f9bc185SSimon L. B. NielsenXircom Cardbus Ethernet 10/100 2665f9bc185SSimon L. B. Nielsen.It 2675f9bc185SSimon L. B. NielsenXircom Cardbus Ethernet II 10/100 2685f9bc185SSimon L. B. Nielsen.El 26983e76ab9SMarius Strobl.Sh NOTES 27083e76ab9SMarius StroblOn sparc64 the 27183e76ab9SMarius Strobl.Nm 27283e76ab9SMarius Strobldriver respects the 27383e76ab9SMarius Strobl.Va local-mac-address? 27483e76ab9SMarius Stroblsystem configuration variable for the built in Sun DMFE 10/100 Mbps Ethernet 27583e76ab9SMarius Stroblinterfaces on Sun Netra X1 and Sun Fire V100. 27683e76ab9SMarius StroblThis system configuration variable can be set in the Open Firmware boot 27783e76ab9SMarius Stroblmonitor using the 27883e76ab9SMarius Strobl.Ic setenv 27983e76ab9SMarius Stroblcommand or by 28083e76ab9SMarius Strobl.Xr eeprom 8 . 28183e76ab9SMarius StroblIf set to 28283e76ab9SMarius Strobl.Dq Li false 28383e76ab9SMarius Strobl(the default), the 28483e76ab9SMarius Strobl.Nm 28583e76ab9SMarius Strobldriver will use the system's default MAC address for both of the built in 28683e76ab9SMarius Strobldevices. 28783e76ab9SMarius StroblIf set to 28883e76ab9SMarius Strobl.Dq Li true , 28983e76ab9SMarius Stroblthe unique MAC address of each interface is used rather than the system's 29083e76ab9SMarius Strobldefault MAC address. 29196f2e892SBill Paul.Sh DIAGNOSTICS 29296f2e892SBill Paul.Bl -diag 29396f2e892SBill Paul.It "dc%d: couldn't map ports/memory" 29496f2e892SBill PaulA fatal initialization error has occurred. 29596f2e892SBill Paul.It "dc%d: couldn't map interrupt" 29696f2e892SBill PaulA fatal initialization error has occurred. 29796f2e892SBill Paul.It "dc%d: watchdog timeout" 29896f2e892SBill PaulA packet was queued for transmission and a transmit command was 299f444a4c5SDima Dorfmanissued, but the device failed to acknowledge the transmission 3006d249eeeSSheldon Hearnbefore a timeout expired. 3016d249eeeSSheldon HearnThis can happen if the device is unable 30296f2e892SBill Paulto deliver interrupts for some reason, of if there is a problem with 303f444a4c5SDima Dorfmanthe network connection (cable or network equipment) that results in a loss 304f444a4c5SDima Dorfmanof link. 30596f2e892SBill Paul.It "dc%d: no memory for rx list" 30696f2e892SBill PaulThe driver failed to allocate an mbuf for the receiver ring. 30796f2e892SBill Paul.It "dc%d: TX underrun -- increasing TX threshold" 30896f2e892SBill PaulThe device generated a transmit underrun error while attempting to 3096d249eeeSSheldon HearnDMA and transmit a packet. 3106d249eeeSSheldon HearnThis happens if the host is not able to 3116d249eeeSSheldon HearnDMA the packet data into the NIC's FIFO fast enough. 3126d249eeeSSheldon HearnThe driver 31396f2e892SBill Paulwill dynamically increase the transmit start threshold so that 31496f2e892SBill Paulmore data must be DMAed into the FIFO before the NIC will start 31596f2e892SBill Paultransmitting it onto the wire. 31696f2e892SBill Paul.It "dc%d: TX underrun -- using store and forward mode" 31796f2e892SBill PaulThe device continued to generate transmit underruns even after all 31896f2e892SBill Paulpossible transmit start threshold settings had been tried, so the 3196d249eeeSSheldon Hearndriver programmed the chip for store and forward mode. 3206d249eeeSSheldon HearnIn this mode, 32196f2e892SBill Paulthe NIC will not begin transmission until the entire packet has been 32296f2e892SBill Paultransfered into its FIFO memory. 32396f2e892SBill Paul.It "dc%d: chip is in D3 power state -- setting to D0" 32496f2e892SBill PaulThis message applies only to adapters which support power 3256d249eeeSSheldon Hearnmanagement. 3266d249eeeSSheldon HearnSome operating systems place the controller in low power 32796f2e892SBill Paulmode when shutting down, and some PCI BIOSes fail to bring the chip 3286d249eeeSSheldon Hearnout of this state before configuring it. 3296d249eeeSSheldon HearnThe controller loses all of 33096f2e892SBill Paulits PCI configuration in the D3 state, so if the BIOS does not set 3310227791bSRuslan Ermilovit back to full power mode in time, it will not be able to configure it 3326d249eeeSSheldon Hearncorrectly. 3336d249eeeSSheldon HearnThe driver tries to detect this condition and bring 33496f2e892SBill Paulthe adapter back to the D0 (full power) state, but this may not be 3356d249eeeSSheldon Hearnenough to return the driver to a fully operational condition. 3366d249eeeSSheldon HearnIf 33796f2e892SBill Paulyou see this message at boot time and the driver fails to attach 338db6ccea6SStephen McKaythe device as a network interface, you will have to perform a second 33996f2e892SBill Paulwarm boot to have the device properly configured. 34096f2e892SBill Paul.Pp 34196f2e892SBill PaulNote that this condition only occurs when warm booting from another 3426d249eeeSSheldon Hearnoperating system. 3436d249eeeSSheldon HearnIf you power down your system prior to booting 34496f2e892SBill Paul.Fx , 34596f2e892SBill Paulthe card should be configured correctly. 34696f2e892SBill Paul.El 34796f2e892SBill Paul.Sh SEE ALSO 34896f2e892SBill Paul.Xr arp 4 , 349071d726dSTom Rhodes.Xr miibus 4 , 35096f2e892SBill Paul.Xr netintro 4 , 35195d7878cSArchie Cobbs.Xr ng_ether 4 , 352a6c410e7SChristian Brueffer.Xr polling 4 , 35383e76ab9SMarius Strobl.Xr eeprom 8 , 35495d7878cSArchie Cobbs.Xr ifconfig 8 35596f2e892SBill Paul.Rs 35696f2e892SBill Paul.%T ADMtek AL981, AL983 and AL985 data sheets 35796f2e892SBill Paul.%O http://www.admtek.com.tw 35896f2e892SBill Paul.Re 35996f2e892SBill Paul.Rs 36096f2e892SBill Paul.%T ASIX Electronics AX88140A and AX88141 data sheets 36196f2e892SBill Paul.%O http://www.asix.com.tw 36296f2e892SBill Paul.Re 36396f2e892SBill Paul.Rs 36496f2e892SBill Paul.%T Davicom DM9102 data sheet 36596f2e892SBill Paul.%O http://www.davicom8.com 36696f2e892SBill Paul.Re 36796f2e892SBill Paul.Rs 36896f2e892SBill Paul.%T Intel 21143 Hardware Reference Manual 36996f2e892SBill Paul.%O http://developer.intel.com 37096f2e892SBill Paul.Re 37196f2e892SBill Paul.Rs 37296f2e892SBill Paul.%T Macronix 98713/A, 98715/A and 98725 data sheets 37396f2e892SBill Paul.%O http://www.macronix.com 37496f2e892SBill Paul.Re 37596f2e892SBill Paul.Rs 37696f2e892SBill Paul.%T Macronix 98713/A and 98715/A app notes 37796f2e892SBill Paul.%O http://www.macronix.com 37896f2e892SBill Paul.Re 37996f2e892SBill Paul.Sh HISTORY 38096f2e892SBill PaulThe 38196f2e892SBill Paul.Nm 38296f2e892SBill Pauldevice driver first appeared in 38396f2e892SBill Paul.Fx 4.0 . 38496f2e892SBill Paul.Sh AUTHORS 38596f2e892SBill PaulThe 38696f2e892SBill Paul.Nm 38796f2e892SBill Pauldriver was written by 38896f2e892SBill Paul.An Bill Paul Aq wpaul@ee.columbia.edu . 38996f2e892SBill Paul.Sh BUGS 39096f2e892SBill PaulThe Macronix application notes claim that in order to put the 391db6ccea6SStephen McKaychips in normal operation, the driver must write a certain magic 3926d249eeeSSheldon Hearnnumber into the CSR16 register. 3936d249eeeSSheldon HearnThe numbers are documented in 39496f2e892SBill Paulthe app notes, but the exact meaning of the bits is not. 39596f2e892SBill Paul.Pp 39696f2e892SBill PaulThe 98713A seems to have a problem with 10Mbps full duplex mode. 39796f2e892SBill PaulThe transmitter works but the receiver tends to produce many 3986d249eeeSSheldon Hearnunexplained errors leading to very poor overall performance. 3996d249eeeSSheldon HearnThe 4006d249eeeSSheldon Hearn98715A does not exhibit this problem. 4016d249eeeSSheldon HearnAll other modes on the 40296f2e892SBill Paul98713A seem to work correctly. 40396f2e892SBill Paul.Pp 40496f2e892SBill PaulThe original 82c168 PNIC chip has built in NWAY support which is 40596f2e892SBill Paulused on certain early LinkSys LNE100TX and Matrox FastNIC cards, 40696f2e892SBill Paulhowever it is horribly broken and difficult to use reliably. 40796f2e892SBill PaulConsequently, autonegotiation is not currently supported for this 40836a142c4SRuslan Ermilovchipset: the driver defaults the NIC to 10baseT half duplex, and it is 40996f2e892SBill Paulup to the operator to manually select a different mode if necessary. 41096f2e892SBill Paul(Later cards use an external MII transceiver to implement NWAY 41196f2e892SBill Paulautonegotiation and work correctly.) 41296f2e892SBill Paul.Pp 41396f2e892SBill PaulThe 41496f2e892SBill Paul.Nm 41596f2e892SBill Pauldriver programs 82c168 and 82c169 PNIC chips to use the store and 4166d249eeeSSheldon Hearnforward setting for the transmit start threshold by default. 4176d249eeeSSheldon HearnThis 41896f2e892SBill Paulis to work around problems with some NIC/PCI bus combinations where 41996f2e892SBill Paulthe PNIC can transmit corrupt frames when operating at 100Mbps, 42096f2e892SBill Paulprobably due to PCI DMA burst transfer errors. 42196f2e892SBill Paul.Pp 4224c42afccSBill PaulThe 82c168 and 82c169 PNIC chips also have a receiver bug that 42396f2e892SBill Paulsometimes manifests during periods of heavy receive and transmit 42496f2e892SBill Paulactivity, where the chip will improperly DMA received frames to 4256d249eeeSSheldon Hearnthe host. 4266d249eeeSSheldon HearnThe chips appear to upload several kilobytes of garbage 42796f2e892SBill Pauldata along with the received frame data, dirtying several RX buffers 4286d249eeeSSheldon Hearninstead of just the expected one. 4296d249eeeSSheldon HearnThe 43096f2e892SBill Paul.Nm 431f444a4c5SDima Dorfmandriver detects this condition and will salvage the frame; however, 43296f2e892SBill Paulit incurs a serious performance penalty in the process. 43396f2e892SBill Paul.Pp 43496f2e892SBill PaulThe PNIC chips also sometimes generate a transmit underrun error when 43596f2e892SBill Paulthe driver attempts to download the receiver filter setup frame, which 4366d249eeeSSheldon Hearncan result in the receive filter being incorrectly programmed. 4376d249eeeSSheldon HearnThe 43896f2e892SBill Paul.Nm 43996f2e892SBill Pauldriver will watch for this condition and requeue the setup frame until 44096f2e892SBill Paulit is transfered successfully. 44196f2e892SBill Paul.Pp 44296f2e892SBill PaulThe ADMtek AL981 chip (and possibly the AN985 as well) has been observed 44396f2e892SBill Paulto sometimes wedge on transmit: this appears to happen when the driver 44496f2e892SBill Paulqueues a sequence of frames which cause it to wrap from the end of the 445f444a4c5SDima Dorfmantransmit descriptor ring back to the beginning. 4466d249eeeSSheldon HearnThe 44796f2e892SBill Paul.Nm 448f87717faSMike Pritcharddriver attempts to avoid this condition by not queuing any frames past 44996f2e892SBill Paulthe end of the transmit ring during a single invocation of the 45096f2e892SBill Paul.Fn dc_start 4516d249eeeSSheldon Hearnroutine. 4526d249eeeSSheldon HearnThis workaround has a negligible impact on transmit performance. 453