1 .TH setpci 8 "@TODAY@" "@VERSION@" "The PCI Utilities"
3 setpci \- configure PCI devices
13 is a utility for querying and configuring PCI devices.
15 All numbers are entered in hexadecimal notation.
17 Root privileges are necessary for almost all operations, excluding reads
18 of the standard header of the configuration space on some operating systems.
21 for details on access rights.
30 to be verbose and display detailed information about configuration space accesses.
35 not to complain when there's nothing to do (when no devices are selected).
36 This option is intended for use in widely-distributed configuration scripts
37 where it's uncertain whether the device in question is present in the machine
41 `Demo mode' -- don't write anything to the configuration registers.
44 to verify that your complex sequence of
46 operations does what you think it should do.
49 Avoids bus scan if each operation selects a specific device (uses the
51 selector with specific domain, bus, slot, and function). This is faster,
52 but if the device does not exist, it fails instead of matching an empty
58 version. This option should be used stand-alone.
61 Show detailed help on available options. This option should be used stand-alone.
64 Show a list of all known PCI registers and capabilities. This option should be
67 .SS PCI access options
69 The PCI utilities use the PCI library to talk to PCI devices (see
70 \fBpcilib\fP(7) for details). You can use the following options to
71 influence its behavior:
74 The library supports a variety of methods to access the PCI hardware.
75 By default, it uses the first access method available, but you can use
76 this option to override this decision. See \fB-A help\fP for a list of
77 available methods and their descriptions.
80 The behavior of the library is controlled by several named parameters.
81 This option allows one to set the value of any of the parameters. Use \fB-O help\fP
82 for a list of known parameters and their default values.
85 Use direct hardware access via Intel configuration mechanism 1.
86 (This is a shorthand for \fB-A intel-conf1\fP.)
89 Use direct hardware access via Intel configuration mechanism 2.
90 (This is a shorthand for \fB-A intel-conf2\fP.)
93 Increase debug level of the library.
97 Before each sequence of operations you need to select which devices you wish that
100 .B -s [[[[<domain>]:]<bus>]:][<slot>][.[<func>]]
101 Consider only devices in the specified domain (in case your machine has several host bridges,
102 they can either share a common bus number space or each of them can address a PCI domain
103 of its own; domains are numbered from 0 to ffff), bus (0 to ff), slot (0 to 1f) and function (0 to 7).
104 Each component of the device address can be omitted or set to "*", both meaning "any value". All numbers are
105 hexadecimal. E.g., "0:" means all devices on bus 0, "0" means all functions of device 0
106 on any bus, "0.3" selects third function of device 0 on all buses and ".4" matches only
107 the fourth function of each device.
109 .B -d [<vendor>]:[<device>]
110 Select devices with specified vendor and device ID. Both ID's are given in
111 hexadecimal and may be omitted or given as "*", both meaning "any value".
117 are combined, only devices that match both criteria are selected. When multiple
118 options of the same kind are specified, the rightmost one overrides the others.
122 There are two kinds of operations: reads and writes. To read a register, just specify
123 its name. Writes have the form
124 .IR name = value , value ...\&
127 is either a hexadecimal number or an expression of type
133 are hexadecimal numbers. In the latter case, only the bits corresponding to binary
134 ones in the \fImask\fP are changed (technically, this is a read-modify-write operation).
137 There are several ways how to identity a register:
139 Tell its address in hexadecimal.
141 Spell its name. Setpci knows the names of all registers in the standard configuration
142 headers. Use `\fBsetpci --dumpregs\fP' to get the complete list.
143 See PCI bus specifications for the precise meaning of these registers or consult
144 \fBheader.h\fP or \fB/usr/include/pci/pci.h\fP for a brief sketch.
146 If the register is a part of a PCI capability, you can specify the name of the
147 capability to get the address of its first register. See the names starting with
148 `CAP_' or `ECAP_' in the \fB--dumpregs\fP output.
150 If the name of the capability is not known to \fBsetpci\fP, you can refer to it
151 by its number in the form CAP\fBid\fP or ECAP\fBid\fP, where \fBid\fP is the numeric
152 identifier of the capability in hexadecimal.
154 Each of the previous formats can be followed by \fB+offset\fP to add an offset
155 (a hex number) to the address. This feature can be useful for addressing of registers
156 living within a capability, or to modify parts of standard registers.
158 To choose how many bytes (1, 2, or 4) should be transferred, you should append a width
159 specifier \fB.B\fP, \fB.W\fP, or \fB.L\fP. The width can be omitted if you are
160 referring to a register by its name and the width of the register is well known.
162 Finally, if a capability exists multiple times you can choose which one to target using
163 \fB@number\fP. Indexing starts at 0.
166 All names of registers and width specifiers are case-insensitive.
172 asks for the word-sized command register.
174 is a numeric address of the same register.
176 asks for a 32-bit word starting at the location of the command register,
177 i.e., the command and status registers together.
179 specifies the upper byte of the vendor ID register (remember, PCI is little-endian).
181 corresponds to the second word of the power management capability.
183 asks for the first 32-bit word of the extended capability with ID 0x108.
190 The PCI Utilities are maintained by Martin Mares <mj@ucw.cz>.