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Print more PCIe information

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This commit is contained in:
Alex Forencich 2021-10-01 17:38:58 -07:00
parent cb52a82498
commit 4b59bad937
1 changed files with 27 additions and 4 deletions
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31
example/common/driver/example/example_driver.c
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@ -73,10 +73,33 @@ static int edev_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
int k;
dev_info(dev, "edev probe");
dev_info(dev, " vendor: 0x%04x", pdev->vendor);
dev_info(dev, " device: 0x%04x", pdev->device);
dev_info(dev, " class: 0x%06x", pdev->class);
dev_info(dev, " pci id: %02x:%02x.%02x", pdev->bus->number, PCI_SLOT(pdev->devfn), PCI_FUNC(pdev->devfn));
dev_info(dev, " Vendor: 0x%04x", pdev->vendor);
dev_info(dev, " Device: 0x%04x", pdev->device);
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;
u16 lnksta;
pci_read_config_word(pdev, pdev->pcie_cap + PCI_EXP_DEVCTL, &devctl);
pci_read_config_dword(pdev, pdev->pcie_cap + PCI_EXP_LNKCAP, &lnkcap);
pci_read_config_word(pdev, pdev->pcie_cap + PCI_EXP_LNKSTA, &lnksta);
dev_info(dev, " Max payload size: %d bytes", 128 << ((devctl & PCI_EXP_DEVCTL_PAYLOAD) >> 5));
dev_info(dev, " Max read request size: %d bytes", 128 << ((devctl & PCI_EXP_DEVCTL_READRQ) >> 12));
dev_info(dev, " Link capability: gen %d x%d", lnkcap & PCI_EXP_LNKCAP_SLS, (lnkcap & PCI_EXP_LNKCAP_MLW) >> 4);
dev_info(dev, " Link status: gen %d x%d", lnksta & PCI_EXP_LNKSTA_CLS, (lnksta & PCI_EXP_LNKSTA_NLW) >> 4);
dev_info(dev, " Relaxed ordering: %s", devctl & PCI_EXP_DEVCTL_RELAX_EN ? "enabled" : "disabled");
dev_info(dev, " Phantom functions: %s", devctl & PCI_EXP_DEVCTL_PHANTOM ? "enabled" : "disabled");
dev_info(dev, " Extended tags: %s", devctl & PCI_EXP_DEVCTL_EXT_TAG ? "enabled" : "disabled");
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 LINUX_VERSION_CODE >= KERNEL_VERSION(4,17,0)
pcie_print_link_status(pdev);
#endif
if (!(edev = devm_kzalloc(dev, sizeof(struct example_dev), GFP_KERNEL))) {
return -ENOMEM;