.\"	$OpenBSD: pci.4,v 1.44 2001/09/05 09:14:51 deraadt Exp $
.\"	$NetBSD: pci.4,v 1.29 2000/04/01 00:32:23 tsarna Exp $
.\"
.\" Copyright (c) 2000 Theo de Raadt.  All rights reserved.
.\" Copyright (c) 1997 Jason R. Thorpe.  All rights reserved.
.\" Copyright (c) 1997 Jonathan Stone
.\" All rights reserved.
.\"
.\" Redistribution and use in source and binary forms, with or without
.\" modification, are permitted provided that the following conditions
.\" are met:
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.\"    documentation and/or other materials provided with the distribution.
.\" 3. All advertising materials mentioning features or use of this software
.\"    must display the following acknowledgements:
.\"      This product includes software developed by Jonathan Stone
.\" 4. The name of the author may not be used to endorse or promote products
.\"    derived from this software without specific prior written permission
.\"
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.\"
.Dd April 3, 2000
.Dt PCI 4
.Os
.Sh NAME
.Nm pci
.Nd introduction to PCI bus support
.Sh SYNOPSIS
.Cd "pci* at mainbus? bus ?"
.Cd "pci* at pchb? bus ?"
.Cd "pci* at ppb? bus ?"
.Pp
Other
.Nm pci
attachments are machine-dependent and depend on the bus topology and
.Tn PCI
bus interface of your system.
See
.Xr intro 4
for your system for details.
.Sh DESCRIPTION
The system includes a machine-independent
.Tn PCI
bus subsystem and
several machine-independent
.Tn PCI
device drivers.
.Pp
Your system may support additional
.Tn PCI
devices.
Drivers for
.Tn PCI
devices not listed here are machine-dependent.
Consult your system's
.Xr intro 4
for additional information.
.Pp
.Ss Details specific to the i386
Note that interrupt mappings on the i386 may require that you configure
your BIOS to reserve sufficient interrupts as "PCI/ISAPnP" so that there
are sufficient interrupts remaining to configure the discovered PCI
devices.  For more information, see
.Xr pcibios 4 .
.Sh SUPPORTED DEVICES
The system includes machine-independent
.Tn PCI
drivers, sorted by device type and driver name:
.Ss SCSI host adapters
.Bl -tag -width 10n -offset ind
.It Xr adw 4 , Xr adv 4
AdvanSys PCI
.Tn SCSI
interfaces.
.It Xr ahc 4
Adaptec 27xx, 29xx, 39xx, 29160, and other AIC-7xxx-based
.Tn SCSI
interfaces.
.It Xr bt 4
Buslogic BT-9xx
.Tn SCSI
interfaces.
.It Xr isp 4
QLogic ISP-1020, ISP-1040, and ISP-2100
.Tn SCSI
and
.Tn FibreChannel
interfaces.
.It Xr iha 4
Initio INIC-940 and INIC-950 based
.Tn SCSI
interfaces.
.It Xr ncr 4 , Xr siop 4
LSI/Symbios Logic/NCR 53c8xx and 53c1010-family
.Tn SCSI
interfaces.
.It Xr pcscp 4
AMD Am53c974 PCscsi-PCI
.Tn SCSI
interfaces.
.El
.Ss RAID and cache controllers
.Bl -tag -width 10n -offset ind
.It Xr aac 4
Adaptec "FSA" family (Adaptec AAC, Dell PERC, HP NetRaid)
.Tn RAID
controllers.
.It Xr ami 4
American Megatrends Inc. MegaRAID family
.Tn RAID
controllers.
.It Xr cac 4
Compaq Smart ARRAY
.Tn RAID
controllers.
.It Xr dpt 4
DPT SmartCache/SmartRAID III and IV
.Tn SCSI
controllers.
.It Xr gdt 4
ICP-Vortex GDT
.Tn RAID
controllers.
.It Xr iop 4
Generic
.Tn I2O
specification
.Tn RAID
controllers.
.It Xr twe 4
3ware Escalade
.Tn RAID
controllers.
.El
.Ss Network interfaces
.Bl -tag -width 10n -offset ind
.It Xr an 4
Aironet Communications 4500/4800 IEEE 802.11DS wireless network adapter.
.It Xr dc 4
Various Tulip-like Ethernet
interfaces such as the DEC/Intel 21143;
Macronix 98713, 98713A, 98715, 98715A, 98725, 98727, and 98732;
Davicom DM9100, DM9102, and DM9102A;
ASIX Electronics AX88140A and AX88141;
ADMtek AL981 Comet and AN983 Centaur-P;
Lite-On 82c168 and 82c169 PNIC;
and
Lite-On/Macronix 82c115 PNIC II.
.It Xr de 4
.Tn DEC
DC21x4x (Tulip) based Ethernet
interfaces, including the DE435, DE450, DE500;
Znyx ZX3xx;
SMC 8432, 9332, 9334;
Cogent/Adaptec EM100FX and EM440TX;
and Asante single- and multi-port
Ethernet interfaces.
Multi-port interfaces are typically configured as
.Tn PCI Ns \- Ns Tn PCI
bridges with multiple
.Xr de 4
instances on the
.Tn PCI
bus on the other side of the bridge.
.It Xr en 4
Midway-based Efficient Networks Inc. and Adaptec ATM interfaces.
.It Xr ep 4
3Com 3c590 and 3c595 Ethernet interfaces.
.It Xr fpa 4
.Tn DEC
DEFPA
.Tn FDDI
interfaces.
.It Xr fxp 4
Intel EtherExpress PRO 10+/100B Ethernet interfaces.
.It Xr le 4
PCNet-PCI Ethernet interfaces.
.It Xr lge 4
Level 1 LXT1001 NetCellerator PCI Gigabit Ethernet.
.It Xr lmc 4
Lan Media Corporation
.Tn SSI/DS1/HSSI/DS3
interfaces.
.It Xr ne 4
NE2000-compatible Ethernet interfaces.
.It Xr nge 4
National Semiconductor DP83820 and DP83821 based Gigabit Ethernet.
.It Xr rl 4
RealTek 8129/8139 Ethernet interfaces.
.It Xr sf 4
Adaptec AIC-6915 "Starfire" Ethernet interfaces.
.It Xr sis 4
SiS 900, SiS 7016, and NS DP83815 Ethernet interfaces.
.It Xr sk 4
SysKonnect SK-984x Gigabit Ethernet interfaces.
.It Xr ste 4
Sundance Technologies ST201 Ethernet interfaces.
.It Xr ti 4
Alteon Networks Tigon I and Tigon II Gigabit Ethernet interfaces.
.It Xr tl 4
Texas Instruments ThunderLAN-based Ethernet interfaces.
.It Xr tx 4
SMC 9432 10/100 Mbps Ethernet interfaces.
.It Xr txp 4
3Com 3XP Typhoon/Sidewinder (3C990) 10/100 Mbps Ethernet interfaces.
.It Xr vr 4
VIA Technologies VT3043 and VT86C100A Ethernet interfaces.
.It Xr wb 4
Winbond W89C840F Ethernet interfaces.
.It Xr wx 4
Intel Gigabit Ethernet interfaces.
.It Xr xl 4
3Com 3c555, 3c556, 3c900, 3c905, 3c980, and 3cSOHO Ethernet interfaces.
.El
.Ss Cryptography accelerators
.Bl -tag -width 10n -offset ind
.It Xr hifn 4
Hi/fn 7751
Symmetric Encryption Accelerator.
.It Xr ubsec 4
Broadcom Bluesteelnet uBsec 5501, 5601, 5805, and 5820.
.It Xr ises 4
Pijnenburg PCC-ISES hardware crypto accelerator.
.El
.Ss Serial interfaces
.Bl -tag -width 10n -offset ind
.It Xr cy 4
Cyclades Cyclom-4Y, -8Y, and -16Y asynchronous serial communications devices.
.El
.Ss Display adapters
.Bl -tag -width 10n -offset ind
.It Xr vga 4
VGA graphics cards.
.El
.Ss Audio devices
.Bl -tag -width 10n -offset ind
.It Xr eap 4
Ensoniq AudioPCI sound devices.
.It Xr eso 4
ESS Solo-1 PCI AudioDrive sound devices.
.It Xr maestro 4
ESS Maestro 1, 2 and 2E sound devices.
.It Xr sv 4
S3 SonicVibes sound devices.
.It Xr neo 4
NeoMagic 256AV/ZX sound devices.
.It Xr fms 4
Forte Media FM801 sound devices.
.It Xr auvia 4
Integrated AC97 audio controller of the VIA Technologies
VT82C686A Southbridge.
.It Xr cmpci 4
C-Media CMI8x38 sound devices.
.It Xr auich 4
Intel 82801AA/AB and 440MX sound devices.
.It Xr clcs 4
Cirrus Logic CrystalClear CS4280 sound devices.
.It Xr clct 4
Cirrus Logic CrystalClear CS4281 sound devices.
.It Xr yds 4
Yamaha DS-XG sound devices.
.El
.Ss Miscellaneous devices
.Bl -tag -width 10n -offset ind
.It Xr bktr 4
Brooktree Bt848
.Tn PCI
video capture boards.
.It Xr cbb 4
.Tn PCI
Yenta compatible
.Tn CardBus
bridges.
.It Xr ohci 4
USB OHCI host controller.
.It Xr pcic 4
.Tn PCI
.Tn PCMCIA
controllers, including the Cirrus Logic GD6729.
.It Xr ppb 4
Generic
.Tn PCI Ns \- Ns Tn PCI
bridges, including
.Tn PCI
expansion backplanes.
.It Xr puc 4
PCI
.Dq universal
communications cards, containing
.Xr com 4
and
.Xr lpt 4
communications ports.
.It Xr uhci 4
USB UHCI host controller.
.It Xr wdt 4
ICS PCI-WDT500/501 watchdog timer devices.
.El
.Sh IOCTLS
If the kernel is compiled with the
.Cd option USER_PCICONF
kernel option, the following
.Xr ioctl 2
calls are supported by the
.Nm
driver.  They are defined in the header file
.Aq Pa sys/pciio.h .
.Bl -tag -width 012345678901234
.Pp
.It PCIOCREAD
This
.Xr ioctl 2
reads the
.Tn PCI
configuration registers specified by the passed-in
.Va pci_io
structure.  The
.Va pci_io
structure consists of the following fields:
.Bl -tag -width pi_width
.It pi_sel
A
.Va pcisel
structure which specifies the bus, slot and function the user would like to
query.
.It pi_reg
The
.Tn PCI
configuration register the user would like to access.
.It pi_width
The width, in bytes, of the data the user would like to read.  This value
may be either 1, 2, or 4.  3-byte reads and reads larger than 4 bytes are
not supported.
.It pi_data
The data returned by the kernel.
.El
.It PCIOCWRITE
This
.Xr ioctl 2
allows users to write to the
.Tn PCI
specified in the passed-in
.Va pci_io
structure.  The
.Va pci_io
structure is described above.  The limitations on data width described for
reading registers, above, also apply to writing
.Tn PCI
configuration registers.
.El
.Sh FILES
.Bl -tag -width /dev/pci -compact
.It Pa /dev/pci
Character device for the
.Nm
driver.
.El
.Sh SEE ALSO
.Xr cardbus 4 ,
.Xr intro 4 ,
.Xr isa 4 ,
.Xr isapnp 4 ,
.Xr options 4 ,
.Xr pchb 4 ,
.Xr pcmcia 4 ,
.Xr usb 4
.Sh HISTORY
The machine-independent
.Tn PCI
subsystem appeared in
.Ox 2.0 .
Support for device listing and matching was re-implemented by
Kenneth Merry, and first appeared in
.Fx 3.0 .