1 .TH pcilib 7 "@TODAY@" "@VERSION@" "The PCI Utilities"
3 pcilib \- a library for accessing PCI devices
7 The PCI library (also known as \fIpcilib\fP and \fIlibpci\fP) is a portable library
8 for accessing PCI devices and their configuration space.
13 The library supports a variety of methods to access the configuration space
14 on different operating systems. By default, the first matching method in this
15 list is used, but you can specify override the decision (see the \fB-A\fP switch
22 filesystem on Linux 2.6 and newer. The standard header of the config space is available
23 to all users, the rest only to root. Supports extended configuration space, PCI domains,
24 VPD (from Linux 2.6.26), physical slots (also since Linux 2.6.26) and information on attached
30 interface supported by Linux 2.1 and newer. The standard header of the config space is available
31 to all users, the rest only to root.
34 Direct hardware access via Intel configuration mechanism 1. Available on i386 and compatibles
35 on Linux, Solaris/x86, GNU Hurd, Windows, BeOS and Haiku. Requires root privileges.
38 Direct hardware access via Intel configuration mechanism 2. Available on i386 and compatibles
39 on Linux, Solaris/x86, GNU Hurd, Windows, BeOS and Haiku. Requires root privileges. Warning: This method
40 is able to address only the first 16 devices on any bus and it seems to be very
41 unreliable in many cases.
44 Direct hardware access via Intel configuration mechanism 1 via memory-mapped I/O.
45 Mostly used on non-i386 platforms. Requires root privileges. Warning: This method
46 needs to be properly configured via the
51 Direct hardware access via Extended PCIe Intel configuration mechanism 1 via memory-mapped I/O.
52 Mostly used on non-i386 platforms. Requires root privileges. Warning: This method
53 needs to be properly configured via the
54 .B mmio-conf1-ext.addrs
58 Direct hardware access via PCIe ECAM (Enhanced Configuration Access Mechanism).
59 Available on all PCIe-compliant hardware. Requires root privileges and access
60 to physical memory (on Linux systems disabled CONFIG_STRICT_DEVMEM option). On
61 ACPI compatible systems is ECAM mapping read from the MCFG table specified by the
63 parameter. On EFI compatible systems, ACPI MCFG table can be located in physical
64 memory via EFI system table specified by the
66 parameter. On FreeBSD/NetBSD systems, physical address of ACPI MCFG table can be
67 located by kenv or sysctl interface when the
69 parameter is not disabled. On x86 BIOS compatible systems, ACPI MCFG table can
70 be located in physical memory by scanning x86 BIOS memory when the
72 parameter is not disabled. Alternatively ECAM mappings can be specified by the
74 parameter which takes precedence over ACPI MCFG table. This option is required
75 on systems without ACPI and also on systems without EFI or x86 BIOS.
80 device on FreeBSD. Requires root privileges.
83 Access method used on AIX. Requires root privileges.
88 device on NetBSD accessed using the local libpci library.
93 device on OpenBSD. Requires root privileges.
96 Read the contents of configuration registers from a file specified in the
98 parameter. The format corresponds to the output of \fIlspci\fP \fB-x\fP.
101 Access method used on Mac OS X / Darwin. Must be run as root and the system
102 must have been booted with debug=0x144.
105 Device listing on Windows systems using the Windows Configuration Manager
106 via cfgmgr32.dll system library. This method does not require any special
107 Administrator rights or privileges. Configuration Manager provides only basic
108 information about devices, assigned resources and device tree structure. There
109 is no access to the PCI configuration space but libpci either tries to use
110 other access method to access configuration space or it provides read-only
111 virtual emulation based on information from Configuration Manager. Other
112 access method can be chosen by the
114 parameter. By default the first working one is selected (if any). Starting
115 with Windows 8 (NT 6.2) it is not possible to retrieve resources from 32-bit
116 application or library on 64-bit system.
119 Access to the PCI configuration space via NT SysDbg interface on Windows
120 systems. Process needs to have Debug privilege, which local Administrators
121 have by default. Not available on 64-bit systems and neither on recent 32-bit
122 systems. Only devices from the first domain are accessible and only first
123 256 bytes of the PCI configuration space is accessible via this method.
126 Access to the PCI configuration space via Kernel Local Debugging Driver
127 kldbgdrv.sys. This driver is not part of the Windows system but is part of
128 the Microsoft WinDbg tool. It is required to have kldbgdrv.sys driver installed
129 in the system32 directory or to have windbg.exe or kd.exe binary in PATH.
130 kldbgdrv.sys driver has some restrictions. Process needs to have Debug privilege
131 and Windows system has to be booted with Debugging option. Debugging option can
132 be enabled by calling (takes effect after next boot):
135 Download links for WinDbg 6.12.2.633 standalone installer from Microsoft Windows
136 SDK for Windows 7 and .NET Framework 4:
138 amd64: https://download.microsoft.com/download/A/6/A/A6AC035D-DA3F-4F0C-ADA4-37C8E5D34E3D/setup/WinSDKDebuggingTools_amd64/dbg_amd64.msi
140 ia64: https://download.microsoft.com/download/A/6/A/A6AC035D-DA3F-4F0C-ADA4-37C8E5D34E3D/setup/WinSDKDebuggingTools_ia64/dbg_ia64.msi
142 x86: https://download.microsoft.com/download/A/6/A/A6AC035D-DA3F-4F0C-ADA4-37C8E5D34E3D/setup/WinSDKDebuggingTools/dbg_x86.msi
144 Archived download links of previous WinDbg versions:
146 https://web.archive.org/web/20110221133326/https://www.microsoft.com/whdc/devtools/debugging/installx86.mspx
148 https://web.archive.org/web/20110214012715/https://www.microsoft.com/whdc/devtools/debugging/install64bit.mspx
153 The library is controlled by several parameters. They should have sensible default
154 values, but in case you want to do something unusual (or even something weird),
155 you can override them (see the \fB-O\fP switch of \fIlspci\fP).
157 .SS Parameters of specific access methods
161 Name of the bus dump file to read from.
164 Path to the FreeBSD PCI device.
167 Path to the NetBSD PCI device.
170 Path to the OpenBSD PCI device.
173 Path to the procfs bus tree.
176 Path to the sysfs device tree.
179 Path to the /dev/mem device.
182 Physical addresses of memory-mapped I/O ports for Intel configuration mechanism 1.
183 CF8 (address) and CFC (data) I/O port addresses are separated by slash and
184 multiple addresses for different PCI domains are separated by commas.
185 Format: 0xaddr1/0xdata1,0xaddr2/0xdata2,...
187 .B mmio-conf1-ext.addrs
188 Physical addresses of memory-mapped I/O ports for Extended PCIe Intel configuration mechanism 1.
189 It has same format as
194 Physical addresses of PCIe ECAM mappings. Each mapping must contains first PCI
195 bus number and physical address where mapping starts. And then it may contain
196 the length of the mapping, the last PCI bus number and PCI domain number. When
197 the last PCI bus number is not provided then it is calculated from the length
198 of the mapping or it is assumed 0xff. When length of the mapping is provided
199 then it is calculated from the last PCI bus number. And when PCI domain is not
200 provided then 0x0 is assumed. All numbers must be supplied in hexadecimal form
201 (leading prefix 0x is not required). Multiple mappings are separated by commas.
202 Format: [domain:]start_bus[-end_bus]:start_addr[+length],...
205 Path to the ACPI MCFG table. Processed by the
207 function, so it may contain wildcards (*).
210 Path to the EFI system table.
213 When not set to 0 then use BSD kenv or sysctl to find ACPI MCFG table. Default
214 value is 1 on BSD systems.
217 When not set to 0 then scan x86 BIOS memory for ACPI MCFG table. Default value
221 Config space access method to use with win32-cfgmgr32 on Windows systems. Value
223 or an empty string selects the first access method which supports access
224 to the config space on Windows. Value
228 only builds a read-only virtual emulated config space with information from the
229 Configuration Manager.
231 .SS Parameters for resolving of ID's via DNS
234 DNS domain containing the ID database.
237 Name of the file used for caching of resolved ID's. An initial
239 is expanded to the user's home directory.
241 .SS Parameters for resolving of ID's via UDEV's HWDB
244 Disable use of HWDB if set to a non-zero value.
251 .BR update-pciids (8)
254 The PCI Utilities are maintained by Martin Mares <mj@ucw.cz>.