NVMe: Implement doorbell stride capability
The doorbell stride allows devices to spread out their doorbells instead
of packing them tightly. This feature was added as part of ECN 003.
This patch also enables support for more than 512 queues :-)
Signed-off-by: Matthew Wilcox <matthew.r.wilcox@intel.com>
diff --git a/include/linux/nvme.h b/include/linux/nvme.h
index c96ab0f..2a2c535 100644
--- a/include/linux/nvme.h
+++ b/include/linux/nvme.h
@@ -36,6 +36,7 @@
};
#define NVME_CAP_TIMEOUT(cap) (((cap) >> 24) & 0xff)
+#define NVME_CAP_STRIDE(cap) (((cap) >> 32) & 0xf)
enum {
NVME_CC_ENABLE = 1 << 0,