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Print PCIe bridge information during driver load

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This commit is contained in:
Alex Forencich 2022-03-15 17:55:29 -07:00
parent fdabde6d0f
commit 623b758598
1 changed files with 22 additions and 0 deletions
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22
modules/mqnic/mqnic_main.c
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@ -290,6 +290,7 @@ static int mqnic_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent
int ret = 0;
struct mqnic_dev *mqnic;
struct device *dev = &pdev->dev;
struct pci_dev *bridge = pci_upstream_bridge(pdev);
dev_info(dev, DRIVER_NAME " PCI probe");
dev_info(dev, " Vendor: 0x%04x", pdev->vendor);
@ -299,6 +300,7 @@ static int mqnic_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent
dev_info(dev, " Class: 0x%06x", pdev->class);
dev_info(dev, " PCI ID: %04x:%02x:%02x.%d", pci_domain_nr(pdev->bus),
pdev->bus->number, PCI_SLOT(pdev->devfn), PCI_FUNC(pdev->devfn));
if (pdev->pcie_cap) {
u16 devctl;
u32 lnkcap;
@ -325,9 +327,29 @@ static int mqnic_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent
dev_info(dev, " No snoop: %s",
devctl & PCI_EXP_DEVCTL_NOSNOOP_EN ? "enabled" : "disabled");
}
#ifdef CONFIG_NUMA
dev_info(dev, " NUMA node: %d", pdev->dev.numa_node);
#endif
if (bridge) {
dev_info(dev, " PCI ID (bridge): %04x:%02x:%02x.%d", pci_domain_nr(bridge->bus),
bridge->bus->number, PCI_SLOT(bridge->devfn), PCI_FUNC(bridge->devfn));
}
if (bridge && bridge->pcie_cap) {
u32 lnkcap;
u16 lnksta;
pci_read_config_dword(bridge, bridge->pcie_cap + PCI_EXP_LNKCAP, &lnkcap);
pci_read_config_word(bridge, bridge->pcie_cap + PCI_EXP_LNKSTA, &lnksta);
dev_info(dev, " Link capability (bridge): gen %d x%d",
lnkcap & PCI_EXP_LNKCAP_SLS, (lnkcap & PCI_EXP_LNKCAP_MLW) >> 4);
dev_info(dev, " Link status (bridge): gen %d x%d",
lnksta & PCI_EXP_LNKSTA_CLS, (lnksta & PCI_EXP_LNKSTA_NLW) >> 4);
}
#if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 17, 0)
pcie_print_link_status(pdev);
#endif