pci_driver.probe function not called so pci_device_id wrong?

Question

I am moving my first steps into Linux Kernel Device Driver development.

I learnt that for pci-e cards I have to call pci_register_driver providing information via an object of type pci_driver ( below an example ). When I load my module ( via insmod ) If the information passed via .id_table is found than the .probe function is called.

As I am now I cannot see my .probe function called at all ( I added some logging via printk ) so I must assume that the information contained in pci_device_id must be wrong, right?

Is there any way to retrieve this information directly from the hardware itself? Once I plug my PCI-E card on my Linux box, where I can find all information about it? Maybe reading BIOS or some file in sys?

Any help is appreciated.

AFG

      static struct pci_driver my_driver = {
      // other here
          .id_table = pci_datatable,
          .probe    = driver_add
      //
      };

      static struct pci_device_id pci_datatable[] __devinitdata =
      {
          { VendorID,  PciExp_0041,  PCI_ANY_ID, PCI_ANY_ID },
          { 0 },
      };

      int __devinit DmaDriverAdd(
          struct pci_dev *             pPciDev,
          const struct pci_device_id * pPciEntry
          )
      {
          // my stuff!
      }

Answer 1

The command you want is lspci.

With no arguments it will give you a list of all PCI devices, eg:

$ lspci
00:00.0 Host bridge: Intel Corporation 2nd Generation Core Processor Family DRAM Controller (rev 09)
00:02.0 VGA compatible controller: Intel Corporation 2nd Generation Core Processor Family 
03:00.0 Network controller: Intel Corporation Centrino Advanced-N 6205 (rev 34)
...

Then to get the ids, use:

$ lspci -v -n -s 03:00.0
03:00.0 0280: 8086:0085 (rev 34)
    Subsystem: 8086:1311
    Flags: bus master, fast devsel, latency 0, IRQ 52

You can also find the same information in /sys:

$ cd /sys/bus/pci/devices/0000:03:00.0 
$ cat vendor device 
0x8086
0x0085
$ cat subsystem_vendor subsystem_device 
0x8086
0x1311