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PCI/ERR: Cache RCEC EA Capability offset in pci_init_capabilities()

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Extend support for Root Complex Event Collectors by decoding and caching
the RCEC Endpoint Association Extended Capabilities when enumerating. Use
that cached information for later error source reporting. See PCIe r5.0,
sec 7.9.10.

Co-developed-by: Qiuxu Zhuo <qiuxu.zhuo@intel.com>
Link: https://lore.kernel.org/r/20201121001036.8560-4-sean.v.kelley@intel.com
Tested-by: Jonathan Cameron <Jonathan.Cameron@huawei.com> # non-native/no RCEC
Signed-off-by: Qiuxu Zhuo <qiuxu.zhuo@intel.com>
Signed-off-by: Sean V Kelley <sean.v.kelley@intel.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
This commit is contained in:
Sean V Kelley
2020-11-20 16:10:24 -08:00
committed by Bjorn Helgaas
parent c9d659b607
commit 9065563198
5 changed files with 83 additions and 1 deletions
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4
include/linux/pci.h
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@@ -304,6 +304,7 @@ struct pcie_link_state;
struct pci_vpd;
struct pci_sriov;
struct pci_p2pdma;
struct rcec_ea;
/* The pci_dev structure describes PCI devices */
struct pci_dev {
@@ -326,6 +327,9 @@ struct pci_dev {
#ifdef CONFIG_PCIEAER
u16 aer_cap; /* AER capability offset */
struct aer_stats *aer_stats; /* AER stats for this device */
#endif
#ifdef CONFIG_PCIEPORTBUS
struct rcec_ea *rcec_ea; /* RCEC cached endpoint association */
#endif
u8 pcie_cap; /* PCIe capability offset */
u8 msi_cap; /* MSI capability offset */