How to interpret the contents of /proc/bus/pci/devices?

The first few fields of 'cat /proc/bus/pci/d开发者_StackOverflowevices' are understandable.

Field 1 - BusDevFunc

Field 2 - Vendor Id + Device Id

Field 3 - Interrupt Line

Field 4 - BAR 0

and the rest of the BAR registers (0 - 5) after that.

After the BAR registers are printed out, what are the other fields? Specifically, what PCI configuration space registers(offsets) are printed out?

This is the corresponding code in the kernel:

static int show_device(struct seq_file *m, void *v)
{
    const struct pci_dev *dev = v;
    const struct pci_driver *drv;
    int i;

    if (dev == NULL)
        return 0;

    drv = pci_dev_driver(dev);
    seq_printf(m, "%02x%02x\t%04x%04x\t%x",
            dev->bus->number,
            dev->devfn,
            dev->vendor,
            dev->device,
            dev->irq);
    /* Here should be 7 and not PCI_NUM_RESOURCES as we need to preserve compatibility */
    for (i=0; i<7; i++) {
        resource_size_t start, end;
        pci_resource_to_user(dev, i, &dev->resource[i], &start, &end);
        seq_printf(m, "\t%16llx",
            (unsigned long long)(start |
            (dev->resource[i].flags & PCI_REGION_FLAG_MASK)));
    }
    for (i=0; i<7; i++) {
        resource_size_t start, end;
        pci_resource_to_user(dev, i, &dev->resource[i], &start, &end);
        seq_printf(m, "\t%16llx",
            dev->resource[i].start < dev->resource[i].end ?
            (unsigned long long)(end - start) + 1 : 0);
    }
    seq_putc(m, '\t');
    if (drv)
        seq_printf(m, "%s", drv->name);
    seq_putc(m, '\n');
    return 0;
}

After the IRQ, it appears to be the start addresses combined with the flags of the first 6 resource regions, followed by the lengths of those resource regions, followed by the name of the driver that has claimed the device.