diff options
Diffstat (limited to 'include/uapi')
| -rw-r--r-- | include/uapi/linux/pci_regs.h | 10 |
1 files changed, 6 insertions, 4 deletions
diff --git a/include/uapi/linux/pci_regs.h b/include/uapi/linux/pci_regs.h index 5bb33f4..591bb3b 100644 --- a/include/uapi/linux/pci_regs.h +++ b/include/uapi/linux/pci_regs.h @@ -544,10 +544,12 @@ #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. + * The Device Capabilities 2, Device Status 2, Device Control 2, + * Link Capabilities 2, Link Status 2, Link Control 2, + * Slot Capabilities 2, Slot Status 2, and Slot Control 2 registers + * are only present on devices with PCIe Capability version 2. + * Use pcie_capability_read_word() and similar interfaces to use them + * safely. */ #define PCI_EXP_DEVCAP2 36 /* Device Capabilities 2 */ #define PCI_EXP_DEVCAP2_ARI 0x20 /* Alternative Routing-ID */ |