PCITWEAK(1) General Commands Manual PCITWEAK(1)NAME
pcitweak - read/write PCI config space
SYNOPSIS
pcitweak -l
pcitweak -r PCI-ID [-b|-h] offset
pcitweak -w PCI-ID [-b|-h] offset value
DESCRIPTION
Pcitweak is a utility that can be used to examine or change registers in the PCI configuration space. On most platfoms pcitweak can only
be run by the root user.
OPTIONS -l Probe the PCI buses and print a line for each detected device. Each line contains the bus location (bus:device:function), chip
vendor/device, card (subsystem) vendor/card, revision, class and header type. All values printed are in hexadecimal.
-r PCI-ID
Read the PCI configuration space register at offset for the PCI device at bus location PCI-ID. PCI-ID should be given in the form
bus:device:function, with each value in hexadecimal. By default, a 32-bit register is read.
-w PCI-ID
Write value to the PCI configuration space register at offset for the PCI device at bus location PCI-ID. PCI-ID should be given in
the form bus:device:function, with each value in hexadecimal. By default, a 32-bit register is written.
-b Read or write an 8-bit value (byte).
-h Read or write a 16-bit value (halfword).
SEE ALSO scanpci(1)AUTHORS
David Dawes (dawes@xfree86.org).
XFree86 Version Version 4.3.0 PCITWEAK(1)
Check Out this Related Man Page
SCANPCI(1) General Commands Manual SCANPCI(1)NAME
scanpci - scan/probe PCI buses
SYNOPSIS
scanpci [-v12OfV]
DESCRIPTION
Scanpci is a utility that can be used to scan PCI buses and report information about the configuration space settings for each PCI device.
On most platforms, scanpci can only be run by the root user.
OPTIONS -v Print the configuration space information for each device in a verbose format. Without this option, only a brief description is
printed for each device.
-x Show hexadecimal dump of the first 64 bytes of each PCI device's configuration space. For CardBus bridges, the first 128 bytes are
dumped instead. This option can be repeated to dump all 256 or 4096 bytes, but doing so might cause scanpci (or the system) to
crash because some devices cannot tolerate reads of undefined portions of their configuration space.
-1 Use PCI config type 1.
-2 Use PCI config type 2.
-f Used in conjunction with the above two options, this forces the specified configuration type to be used for config space access.
-O Use the OS's PCI config space access mechanism to access the PCI config space (when available).
-V n Set the verbosity level to n for the internal PCI scanner. This is primarily for debugging use.
SEE ALSO pcitweak(1)AUTHORS XFree86 Version 4.7.0 SCANPCI(1)
Hi,
I am getting a bus error when i run the following code.
#include <stdio.h>
#include <sys/types.h>
#include <sys/ipc.h>
#include <sys/sem.h>
#include <errno.h>
main()
{
int semid,retval;
semid=semget(0x20,1,IPC_CREAT|0666);
retval= semctl(semid,0,GETVAL,0);
printf("The... (1 Reply)
:confused:
Hi, everybody.
Pleeeeese HLP!!!
I write PCI device driver for bridge controller PCI-VME bus in freeBSD 2.2.
And firs run function probe():
static char* probe(tag, type).
Whuy probe() don't work for my vendorID and deviceID (bridge controller and videoadapter). But... (1 Reply)
Hi all,
I have customized tool that displays PCI device information (something similar to the linux - "lspci") . Now, I need to display information only on "plug-in" cards. Are there any ways to distinguish between "on-board" PCI device and a PCI "plug-in" card.
Thanks,
Dhilip (2 Replies)
hi guys,
I have a rp7400 running on 11i and i would like to attach LTO3 certance OEM quantum to this box using an ultra 2 scsi lvd/se-A5149A PCI adapter.Once i attached this card and try to detect it in boot handler running the io command,i can't see the card but once i attach it to the internal... (0 Replies)
hello friends,
While in the process of writing device drivers,
i am facing problem in reading and writing device registers.I got base address of those mapped device registers. Can i add offset of those registers to that Base address to get access of those... (1 Reply)
Hello, every one,
I tried to install redhat linux enterprise server version 4 (ES4) on the my system with the
following configuration
Pentium core 2 duo 2.66 E 6750
Intel DG33FB motherboard
160Gb Segate hard disk (SATA)
1024 mb (1GB) DDR2 TRAN RAM
Lg DVD/Cd WR
BUT AM GETTING... (0 Replies)
Hi All,
Probe is not returning the Device ID, while device (PCI Express-to-PCI Bridge) is already detected by "lspci". I checked this with printing all the device ID which has been detected.
Can anyone give me any suggestion or solution.
Thanks (in advance)
Appu (2 Replies)
I am new to Unix so will really appreciate if someone can guide me on this.
What I want to do is:
Step1: Read binary file - pick first 2 bytes, convert from hex to decimal. Read the next 3 bytes as well.
2 bytes will specify the number of bytes 'n' that I want to read and write... (1 Reply)
Hi all,
Can anyone help me to get the server specifications like the following?
eg.
SUN Fire XXX
X UltraSPARC X MHZ
X MB Memory
X GB od hard disk
X On board PCI IO card
X PCI HNI card
Thanks. (4 Replies)
I have a file containing bus notations which need to be expanded.
Example:
file contains a line like below :
assign gam_ci_raddr = `GTTBTOP.gt2gti1.gt2sqidi1.gam_ci_raddr;
What needed is
assign gam_ci_raddr = `GTTBTOP.gt2gti1.gt2sqidi1.gam_ci_raddr;
assign gam_ci_raddr =... (1 Reply)
I installed PCI Card HP SC44Ge - SAS1068E
on my linux CentOS 5.4
is there a way to find out if the PCI is properly installed and recognized by linux.
lspci is enough?
just to add that PCI card is connected to a tape...
also how can I find out driver and firmware version?
thanks a... (1 Reply)
Hey guys,
I know that in normal desktop computers, the CPU interfaces the video card, sound card, USB card, etc by the PCI slots but what about laptops? I've heard that laptops also have a PCI bus even though do don't have a PCI slot so does this mean that the same address space that would... (4 Replies)
Hi,
I have this problem on RHEL box. I am using two NIC's of same model and make (Intel 82557) in the adjacent PCI slots . I am using each one for different subnet and have assigned them ipaddresses and gateways of respective subnets . While one is O.K. connecting to its ... (5 Replies)
I am getting error in a shell script having a simple date command.
Error is " write to 1 failed ".
We saw that /tmp folder was 100% full. When we cleared some space in /tmp folder then script worked fine. Why does date command(or any other command) require space in /tmp folder? Which settings... (6 Replies)