Messages in this thread Patch in this message | | | From | Vidya Sagar <> | Subject | [PATCH V14 01/13] PCI: Add #defines for some of PCIe spec r4.0 features | Date | Wed, 24 Jul 2019 23:18:12 +0530 |
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Add #defines only for the Data Link Feature and Physical Layer 16.0 GT/s features as defined in PCIe spec r4.0, sec 7.7.4 for Data Link Feature and sec 7.7.5 for Physical Layer 16.0 GT/s.
Signed-off-by: Vidya Sagar <vidyas@nvidia.com> Reviewed-by: Thierry Reding <treding@nvidia.com> Acked-by: Bjorn Helgaas <bhelgaas@google.com> --- V14: * Added 'Acked-by: Bjorn Helgaas <bhelgaas@google.com>'
V13: * Updated commit message to include references from spec * Removed unused defines and moved some from pcie-tegra194.c file * Addressed review comments from Bjorn
V12: * None
V11: * None
V10: * None
V9: * None
V8: * None
V7: * None
V6: * None
V5: * None
V4: * None
V3: * Updated commit message and description to explicitly mention that defines are added only for some of the features and not all.
V2: * None
include/uapi/linux/pci_regs.h | 14 +++++++++++++- 1 file changed, 13 insertions(+), 1 deletion(-)
diff --git a/include/uapi/linux/pci_regs.h b/include/uapi/linux/pci_regs.h index f28e562d7ca8..d28d0319d932 100644 --- a/include/uapi/linux/pci_regs.h +++ b/include/uapi/linux/pci_regs.h @@ -713,7 +713,9 @@ #define PCI_EXT_CAP_ID_DPC 0x1D /* Downstream Port Containment */ #define PCI_EXT_CAP_ID_L1SS 0x1E /* L1 PM Substates */ #define PCI_EXT_CAP_ID_PTM 0x1F /* Precision Time Measurement */ -#define PCI_EXT_CAP_ID_MAX PCI_EXT_CAP_ID_PTM +#define PCI_EXT_CAP_ID_DLF 0x25 /* Data Link Feature */ +#define PCI_EXT_CAP_ID_PL_16GT 0x26 /* Physical Layer 16.0 GT/s */ +#define PCI_EXT_CAP_ID_MAX PCI_EXT_CAP_ID_PL_16GT #define PCI_EXT_CAP_DSN_SIZEOF 12 #define PCI_EXT_CAP_MCAST_ENDPOINT_SIZEOF 40 @@ -1053,4 +1055,14 @@ #define PCI_L1SS_CTL1_LTR_L12_TH_SCALE 0xe0000000 /* LTR_L1.2_THRESHOLD_Scale */ #define PCI_L1SS_CTL2 0x0c /* Control 2 Register */ +/* Data Link Feature */ +#define PCI_DLF_CAP 0x04 /* Capabilities Register */ +#define PCI_DLF_EXCHANGE_ENABLE 0x80000000 /* Data Link Feature Exchange Enable */ + +/* Physical Layer 16.0 GT/s */ +#define PCI_PL_16GT_LE_CTRL 0x20 /* Lane Equalization Control Register */ +#define PCI_PL_16GT_LE_CTRL_DSP_TX_PRESET_MASK 0x0000000F +#define PCI_PL_16GT_LE_CTRL_USP_TX_PRESET_MASK 0x000000F0 +#define PCI_PL_16GT_LE_CTRL_USP_TX_PRESET_SHIFT 4 + #endif /* LINUX_PCI_REGS_H */ -- 2.17.1
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