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authorJesse Barnes <jbarnes@virtuousgeek.org>2010-10-19 13:07:57 -0700
committerJesse Barnes <jbarnes@virtuousgeek.org>2011-05-11 15:18:40 -0700
commitb48d4425b602f5f4978299474743dbea130d940d (patch)
tree7da23c264cab62bce753e60c4e8d5fbbb0aab0e7 /include/linux/pci_regs.h
parent69643e4829c5cd13bafe44a6b9f3eb2086e0f618 (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.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/include/linux/pci_regs.h b/include/linux/pci_regs.h
index be01380f798..d9acf9b9981 100644
--- a/include/linux/pci_regs.h
+++ b/include/linux/pci_regs.h
@@ -510,6 +510,8 @@
#define PCI_EXP_DEVCAP2_ARI 0x20 /* Alternative Routing-ID */
#define PCI_EXP_DEVCTL2 40 /* Device Control 2 */
#define PCI_EXP_DEVCTL2_ARI 0x20 /* Alternative Routing-ID */
+#define PCI_EXP_IDO_REQ_EN 0x100 /* ID-based ordering request enable */
+#define PCI_EXP_IDO_CMP_EN 0x200 /* ID-based ordering completion enable */
#define PCI_EXP_LNKCTL2 48 /* Link Control 2 */
#define PCI_EXP_SLTCTL2 56 /* Slot Control 2 */