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NVMe: Add nvme subsystem reset IOCTL

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Controllers can perform optional subsystem resets as introduced in NVMe
1.1. This patch adds an IOCTL to trigger the subsystem reset by writing
"NVMe" to the NSSR register.

Signed-off-by: Jon Derrick <jonathan.derrick@intel.com>
Acked-by: Keith Busch <keith.busch@intel.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
This commit is contained in:
Jon Derrick 2015-08-10 15:20:41 -06:00 • committed by Jens Axboe
parent dfbac8c7ac
commit 81f03fedcc
3 changed files with 13 additions and 1 deletions
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2
include/linux/nvme.h
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@ -28,7 +28,7 @@ struct nvme_bar {
__u32 cc; /* Controller Configuration */
__u32 rsvd1; /* Reserved */
__u32 csts; /* Controller Status */
__u32 rsvd2; /* Reserved */
__u32 nssr; /* Subsystem Reset */
__u32 aqa; /* Admin Queue Attributes */
__u64 asq; /* Admin SQ Base Address */
__u64 acq; /* Admin CQ Base Address */