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PCI: Log device type during enumeration

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Log the device type when enumeration a device.  Sample output changes:

  - pci 0000:00:00.0: [8086:1237] type 00 class 0x060000
  + pci 0000:00:00.0: [8086:1237] type 00 class 0x060000 conventional PCI endpoint

  - pci 0000:00:1c.0: [8086:a110] type 01 class 0x060400
  + pci 0000:00:1c.0: [8086:a110] type 01 class 0x060400 PCIe Root Port

Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
This commit is contained in:
Bjorn Helgaas
2023-11-10 15:43:15 -06:00
parent b85ea95d08
commit 35259ff188
1 changed files with 40 additions and 2 deletions
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42
drivers/pci/probe.c
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@@ -1817,6 +1817,43 @@ static void early_dump_pci_device(struct pci_dev *pdev)
value, 256, false);
}
static const char *pci_type_str(struct pci_dev *dev)
{
static const char * const str[] = {
"PCIe Endpoint",
"PCIe Legacy Endpoint",
"PCIe unknown",
"PCIe unknown",
"PCIe Root Port",
"PCIe Switch Upstream Port",
"PCIe Switch Downstream Port",
"PCIe to PCI/PCI-X bridge",
"PCI/PCI-X to PCIe bridge",
"PCIe Root Complex Integrated Endpoint",
"PCIe Root Complex Event Collector",
};
int type;
if (pci_is_pcie(dev)) {
type = pci_pcie_type(dev);
if (type < ARRAY_SIZE(str))
return str[type];
return "PCIe unknown";
}
switch (dev->hdr_type) {
case PCI_HEADER_TYPE_NORMAL:
return "conventional PCI endpoint";
case PCI_HEADER_TYPE_BRIDGE:
return "conventional PCI bridge";
case PCI_HEADER_TYPE_CARDBUS:
return "CardBus bridge";
default:
return "conventional PCI";
}
}
/**
* pci_setup_device - Fill in class and map information of a device
* @dev: the device structure to fill
@@ -1887,8 +1924,9 @@ int pci_setup_device(struct pci_dev *dev)
pci_set_removable(dev);
pci_info(dev, "[%04x:%04x] type %02x class %#08x\n",
dev->vendor, dev->device, dev->hdr_type, dev->class);
pci_info(dev, "[%04x:%04x] type %02x class %#08x %s\n",
dev->vendor, dev->device, dev->hdr_type, dev->class,
pci_type_str(dev));
/* Device class may be changed after fixup */
class = dev->class >> 8;