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PCI: Add defines for PCIe Max_Read_Request_Size

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There are a few drivers using magic numbers when operating with PCIe
capabilities and PCI_EXP_DEVCTL_READRQ.  Define known values to allow
cleaning their code a bit.

Signed-off-by: Rafał Miłecki <zajec5@gmail.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
This commit is contained in:
Rafał Miłecki 2015-01-26 18:05:22 +01:00 committed by Bjorn Helgaas
parent 94a90312e4
commit 5929b8a38c
1 changed files with 4 additions and 0 deletions
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4
include/uapi/linux/pci_regs.h
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@ -451,6 +451,10 @@
#define PCI_EXP_DEVCTL_AUX_PME 0x0400 /* Auxiliary Power PM Enable */
#define PCI_EXP_DEVCTL_NOSNOOP_EN 0x0800 /* Enable No Snoop */
#define PCI_EXP_DEVCTL_READRQ 0x7000 /* Max_Read_Request_Size */
#define PCI_EXP_DEVCTL_READRQ_128B 0x0000 /* 128 Bytes */
#define PCI_EXP_DEVCTL_READRQ_256B 0x1000 /* 256 Bytes */
#define PCI_EXP_DEVCTL_READRQ_512B 0x2000 /* 512 Bytes */
#define PCI_EXP_DEVCTL_READRQ_1024B 0x3000 /* 1024 Bytes */
#define PCI_EXP_DEVCTL_BCR_FLR 0x8000 /* Bridge Configuration Retry / FLR */
#define PCI_EXP_DEVSTA 10 /* Device Status */
#define PCI_EXP_DEVSTA_CED 0x0001 /* Correctable Error Detected */