I am new to PCI express, I want to read/write into PCI Express configuration space via MMIO addresses. I know how port mapped IO read/write into PCI express config space via 0xCFC and 0xCF8 port ad...

Intel manual says that local APIC registers are memory mapped to a 4KB region, with the default address being FEE00000H. This address can be modified using IA32_APIC_BASE MSR. Quoting SDM Vol 3, s...

In Linux, is there a way to find out which PCI card is plugged into which PCI slot? /sys/bus/pci/devices/ contains many devices (bridges, CPU channels, etc.) that are not cards and I was not able ...

I have here Linux 4.4 (I used to work on an older kernel which failed in the same way) with a PCIe connected FPGA device and a driver for it which are both of my own design. These have been working...

I've tried both reading userspace pci entry under /proc/bus/pci directory and calling kernel space API pci_read_config_word() in the driver. but it seems both can only read pci basic configuration ...

I know that the base address register (BAR) in PCI configuration space defines the start location of a PCI address, but how does the size of this region get established? Surely this is a property ...

I have a small kernel which is booted with UEFI. I'm using QEMU for virtualization. I want to write a xHCI driver to support USB keyboards in my kernel. I'm having trouble to find concise and clear...

In Ethernet PCI device driver if the driver allows applications to map user-space buffer to Driver virtual memory and allow the user to call MMAP on device driver file after opening it. Then how do...

I am doing a project to read the registers of the device from the pci configuration space and for that I need to mmap the space, for this I have to read the resource file. But what data this file c...

After going through some basics documents what I understood is, Base Address Register is Address space which can be accessed by PCIe IP. PCIe IP can either transmit data in Base Address Register or...

I'm trying to understand how PCI segment(domain) is related to multiple Host Bridges? Some people say multiple PCI domains corresponds to multiple Host Bridges, but some say it means multip...

On windows there is this program called pcitree that allows you to set and read memory without writing a device driver. Is there a linux alternative to pcitree that will allow me read memory on blo...

Does anyone know of a PCI card suitable for Android development? I find the emulator unusably slow (Linux 64-bit, quad-core, 8GB RAM), and a card I could hide in my desktop would be nice. I know t...

I understand that PCI and PCIe devices can be configured by the CPU (via code in the BIOS or OS) to respond to certain physical memory addresses by writing to specific areas of the device's configu...

In order to access PCI Configuration Space, I/O port address 0xCF8, 0xCFC is used according to various articles. mov eax, dword 0x80000000 mov dx, word 0x0CF8 out dx, eax mov dx, word 0x0CFC in e...

Currently working on a PCI device driver. And the device is programmed like this: When a DMA transmission is done, the device send a MSI interrupt to PC with MSI data "001" binary. Now I'm writin...

I need hardware information just as listed below which was generated using lshw in linux. I need a windows equivalent without a GUI more preferably like a code or dll which can be used to extract t...

After looking at the kernel docs here: https://www.kernel.org/doc/Documentation/PCI/pci.txt I am lost as to the ordering of function calls to set up and tear down a PCI driver. I have two question...

I'd like to verify on any given Linux machine if PCI passthrough is supported. After a bit of googling, I found that I should rather check if IOMMU is supported, and I did so by running: dme...

I'm looking for either a kernel mode call that I can make from a driver, a userland utility, or a system call that will ask the Kernel to look at the PCI bus and either completely re-run its initia...

I am writing a device driver for a PCIe card in Linux. I am trying to use interrupts in my driver. Reading the "IRQ Line" section of the PCI configuration register (offset 0x3C) reports that the a...

Given the address of a PCI device (i.e. bus, device, function), how can one programatically read, using Win32 API calls in userspace, the config space (e.g. vendor ID, device ID) for that device? ...

I'm trying to write a simple helper application that is used to prompt the user to turn on a camcorder if no signal is detected, which in this case would mean the camcorder is off and/or the HDMI c...

Objective I'm trying to programmatically find out on which physical slot a particular PCIe device is connected. The premise is that I have the PCI-ID of a card that is surely occupying a slot, and...

Before registering a PCI driver, we have to initialize struct pci_driver and pass it to pci_register_driver. One of fields of the structure is a pointer to driver's probe function. My question is ...