diff options
| author | Jesse Barnes <jbarnes@virtuousgeek.org> | 2010-10-19 16:07:57 -0400 |
|---|---|---|
| committer | Jesse Barnes <jbarnes@virtuousgeek.org> | 2011-05-11 18:18:40 -0400 |
| commit | b48d4425b602f5f4978299474743dbea130d940d (patch) | |
| tree | 7da23c264cab62bce753e60c4e8d5fbbb0aab0e7 /include/linux/pci_regs.h | |
| parent | 69643e4829c5cd13bafe44a6b9f3eb2086e0f618 (diff) | |
PCI: add ID-based ordering enable/disable support
Add support to allow drivers to enable/disable ID-based ordering. Where
supported, ID-based ordering can significantly improve the latency of
individual requests by preventing them from queueing up behind unrelated
traffic.
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Diffstat (limited to 'include/linux/pci_regs.h')
| -rw-r--r-- | include/linux/pci_regs.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/include/linux/pci_regs.h b/include/linux/pci_regs.h index be01380f798a..d9acf9b99814 100644 --- a/include/linux/pci_regs.h +++ b/include/linux/pci_regs.h | |||
| @@ -510,6 +510,8 @@ | |||
| 510 | #define PCI_EXP_DEVCAP2_ARI 0x20 /* Alternative Routing-ID */ | 510 | #define PCI_EXP_DEVCAP2_ARI 0x20 /* Alternative Routing-ID */ |
| 511 | #define PCI_EXP_DEVCTL2 40 /* Device Control 2 */ | 511 | #define PCI_EXP_DEVCTL2 40 /* Device Control 2 */ |
| 512 | #define PCI_EXP_DEVCTL2_ARI 0x20 /* Alternative Routing-ID */ | 512 | #define PCI_EXP_DEVCTL2_ARI 0x20 /* Alternative Routing-ID */ |
| 513 | #define PCI_EXP_IDO_REQ_EN 0x100 /* ID-based ordering request enable */ | ||
| 514 | #define PCI_EXP_IDO_CMP_EN 0x200 /* ID-based ordering completion enable */ | ||
| 513 | #define PCI_EXP_LNKCTL2 48 /* Link Control 2 */ | 515 | #define PCI_EXP_LNKCTL2 48 /* Link Control 2 */ |
| 514 | #define PCI_EXP_SLTCTL2 56 /* Slot Control 2 */ | 516 | #define PCI_EXP_SLTCTL2 56 /* Slot Control 2 */ |
| 515 | 517 | ||