diff options
Diffstat (limited to 'include/linux/pci_regs.h')
| -rw-r--r-- | include/linux/pci_regs.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/include/linux/pci_regs.h b/include/linux/pci_regs.h index 526d2c4bc3a6..80e8605b5f93 100644 --- a/include/linux/pci_regs.h +++ b/include/linux/pci_regs.h @@ -521,6 +521,12 @@ #define PCI_EXP_RTSTA 32 /* Root Status */ #define PCI_EXP_RTSTA_PME 0x10000 /* PME status */ #define PCI_EXP_RTSTA_PENDING 0x20000 /* PME pending */ +/* + * Note that the following PCI Express 'Capability Structure' registers + * were introduced with 'Capability Version' 0x2 (v2). These registers + * do not exist on devices with Capability Version 1. Use pci_pcie_cap2() + * to use these fields safely. + */ #define PCI_EXP_DEVCAP2 36 /* Device Capabilities 2 */ #define PCI_EXP_DEVCAP2_ARI 0x20 /* Alternative Routing-ID */ #define PCI_EXP_DEVCAP2_LTR 0x800 /* Latency tolerance reporting */ |