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PCI/ASPM: Add L1 substate capability structure register definitions 

Add L1 substate capability structure register definitions for use in
subsequent patches.  See the PCIe r3.1 spec, sec 7.33.

[bhelgaas: add PCIe spec reference]
Signed-off-by: Rajat Jain <rajatja@google.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
This commit is contained in:
Rajat Jain 2017-01-02 22:34:10 -08:00 committed by Bjorn Helgaas
parent 7ce7d89f48
commit 0fc1223f0e
1 changed files with 16 additions and 0 deletions
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16
include/uapi/linux/pci_regs.h
View File

@ -682,6 +682,7 @@
#define PCI_EXT_CAP_ID_PMUX 0x1A /* Protocol Multiplexing */
#define PCI_EXT_CAP_ID_PASID 0x1B /* Process Address Space ID */
#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
@ -985,4 +986,19 @@
#define PCI_PTM_CTRL_ENABLE 0x00000001 /* PTM enable */
#define PCI_PTM_CTRL_ROOT 0x00000002 /* Root select */
/* L1 PM Substates */
#define PCI_L1SS_CAP 4 /* capability register */
#define PCI_L1SS_CAP_PCIPM_L1_2 1 /* PCI PM L1.2 Support */
#define PCI_L1SS_CAP_PCIPM_L1_1 2 /* PCI PM L1.1 Support */
#define PCI_L1SS_CAP_ASPM_L1_2 4 /* ASPM L1.2 Support */
#define PCI_L1SS_CAP_ASPM_L1_1 8 /* ASPM L1.1 Support */
#define PCI_L1SS_CAP_L1_PM_SS 16 /* L1 PM Substates Support */
#define PCI_L1SS_CTL1 8 /* Control Register 1 */
#define PCI_L1SS_CTL1_PCIPM_L1_2 1 /* PCI PM L1.2 Enable */
#define PCI_L1SS_CTL1_PCIPM_L1_1 2 /* PCI PM L1.1 Support */
#define PCI_L1SS_CTL1_ASPM_L1_2 4 /* ASPM L1.2 Support */
#define PCI_L1SS_CTL1_ASPM_L1_1 8 /* ASPM L1.1 Support */
#define PCI_L1SS_CTL1_L1SS_MASK 0x0000000F
#define PCI_L1SS_CTL2 0xC /* Control Register 2 */
#endif /* LINUX_PCI_REGS_H */