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+.\"
+.\" This file and its contents are supplied under the terms of the
+.\" Common Development and Distribution License ("CDDL"), version 1.0.
+.\" You may only use this file in accordance with the terms of version
+.\" 1.0 of the CDDL.
+.\"
+.\" A full copy of the text of the CDDL should have accompanied this
+.\" source.  A copy of the CDDL is also available via the Internet at
+.\" http://www.illumos.org/license/CDDL.
+.\"
+.\"
+.\" Copyright 2015 Nexenta Systems, Inc.  All rights reserved.
+.\"
+.Dd July 20, 2015
+.Dt NVME 7D
+.Os
+.Sh NAME
+.Nm nvme
+.Nd Intel NVMe compliant storage driver
+.Sh DESCRIPTION
+The
+.Nm
+driver uses the
+.Xr blkdev 7D
+framework to provide access to
+.Tn Intel
+NVMe compliant solid-state storage devices.
+.Lp
+NVMe devices supporting multiple namespaces will present each
+namespace as its own
+.Xr blkdev 7D
+instance in the system.
+.
+.Sh CONFIGURATION
+The
+.Nm
+driver can be configured by defining properties in the \fBnvme.conf\fR
+file. The parameters are considered an unstable interface, subject to
+change without notice. The following properties are currently
+supported:
+.Bl -tag -width Va
+.It Va strict-version
+This can be set to 0 to allow
+.Nm
+to attach to devices supporting newer version of the NVMe
+specification. The default value is 1, limiting
+.Nm
+to work with devices up to specification version 1.0.
+.It Va ignore-unknown-vendor-status
+This can be set to 1 to allow
+.Nm
+to continue operating even if it receives an unknown vendor command
+status.
+.It Va admin-queue-len
+This is the number of entries in the admin command queue. Legal values
+are between 16 and 4096, the default value is 256.
+.It Va io-queue-len
+This is the number of entries in each I/O command queue. Legal values
+are between 16 and 65536, the default value is 1024.
+.It Va async-event-limit
+This is the maximum number of asynchronous event requests issued by
+the driver. Asynchronous events are used to report error conditions.
+The driver will never use more asynchronous events than this value, or
+what the hardware supports if it is less, or what 1/10th of the admin
+queue length if it is less.
+.El
+.
+.Sh FILES
+.Bl -tag -compact -width Pa
+.It Pa /dev/dsk/cntnd0sn
+Block device minor nodes.
+.It Pa /dev/rdsk/cntnd0sn
+Raw block device minor nodes.
+.El
+.Lp
+In the device minor nodes, the following substitutions may occur:
+.Bl -tag -offset indent -width Va
+.It Va cn
+A controller number, typically one for each
+.Nm
+device found. Controller numbers are dynamically assigned by the
+system.
+.It Va tn
+The target number, this corresponds to the namespace ID used by the
+hardware. Namespace ID 0 is reserved, hence target numbers start with
+1.
+.It Va sn
+This is the
+.Em slice
+number, representing a subset of the disk.  See
+.Xr dkio 7I .
+.El
+.
+.Sh SEE ALSO
+.Xr blkdev 7D