12f001371SPeter Grehan.\" Copyright (c) 2012 Bryan Venteicher 22f001371SPeter Grehan.\" All rights reserved. 32f001371SPeter Grehan.\" 42f001371SPeter Grehan.\" Redistribution and use in source and binary forms, with or without 52f001371SPeter Grehan.\" modification, are permitted provided that the following conditions 62f001371SPeter Grehan.\" are met: 72f001371SPeter Grehan.\" 1. Redistributions of source code must retain the above copyright 82f001371SPeter Grehan.\" notice, this list of conditions and the following disclaimer. 92f001371SPeter Grehan.\" 2. Redistributions in binary form must reproduce the above copyright 102f001371SPeter Grehan.\" notice, this list of conditions and the following disclaimer in the 112f001371SPeter Grehan.\" documentation and/or other materials provided with the distribution. 122f001371SPeter Grehan.\" 132f001371SPeter Grehan.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 142f001371SPeter Grehan.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 152f001371SPeter Grehan.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 162f001371SPeter Grehan.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 172f001371SPeter Grehan.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 182f001371SPeter Grehan.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 192f001371SPeter Grehan.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 202f001371SPeter Grehan.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 212f001371SPeter Grehan.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 222f001371SPeter Grehan.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 232f001371SPeter Grehan.\" SUCH DAMAGE. 242f001371SPeter Grehan.\" 252f001371SPeter Grehan.\" $FreeBSD$ 262f001371SPeter Grehan.\" 272f001371SPeter Grehan.Dd June 24, 2012 282f001371SPeter Grehan.Dt VIRTIO_SCSI 4 292f001371SPeter Grehan.Os 302f001371SPeter Grehan.Sh NAME 312f001371SPeter Grehan.Nm virtio_scsi 322f001371SPeter Grehan.Nd VirtIO SCSI driver 332f001371SPeter Grehan.Sh SYNOPSIS 342f001371SPeter GrehanTo compile this driver into the kernel, 352f001371SPeter Grehanplace the following lines in your 362f001371SPeter Grehankernel configuration file: 372f001371SPeter Grehan.Bd -ragged -offset indent 382f001371SPeter Grehan.Cd "device virtio_scsi" 392f001371SPeter Grehan.Ed 402f001371SPeter Grehan.Pp 412f001371SPeter GrehanAlternatively, to load the driver as a 422f001371SPeter Grehanmodule at boot time, place the following line in 432f001371SPeter Grehan.Xr loader.conf 5 : 442f001371SPeter Grehan.Bd -literal -offset indent 452f001371SPeter Grehanvirtio_scsi_load="YES" 462f001371SPeter Grehan.Ed 472f001371SPeter Grehan.Sh DESCRIPTION 482f001371SPeter GrehanThe 492f001371SPeter Grehan.Nm 502f001371SPeter Grehandevice driver provides support for VirtIO SCSI devices. 512f001371SPeter Grehan.Sh LOADER TUNABLES 522f001371SPeter GrehanTunables can be set at the 532f001371SPeter Grehan.Xr loader 8 542f001371SPeter Grehanprompt before booting the kernel or stored in 552f001371SPeter Grehan.Xr loader.conf 5 . 562f001371SPeter Grehan.Bl -tag -width "xxxxxx" 572f001371SPeter Grehan.It Va hw.vtscsi.bus_reset_disable 582f001371SPeter GrehanIn the initial QEMU release with VirtIO SCSI support, in-flight 592f001371SPeter Grehanoperations were not aborted when stopping the device, rendering 60*25972509SEdward Tomasz Napieralabus reset ineffective. 61*25972509SEdward Tomasz NapieralaThis tunable disables attempts to issue reset bus commands. 62*25972509SEdward Tomasz NapieralaThe default value is 1. 632f001371SPeter Grehan.El 642f001371SPeter Grehan.Sh DEBUGGING 652f001371SPeter GrehanTo enable debugging prints from the 662f001371SPeter Grehan.Nm 672f001371SPeter Grehandriver, set the 682f001371SPeter Grehan.Bd -literal -offset indent 692f001371SPeter Grehanhw.vtscsi.X.debug_level 702f001371SPeter Grehan.Ed 712f001371SPeter Grehan.Pp 722f001371SPeter Grehanvariable, where X is the adapter number, either in 732f001371SPeter Grehan.Xr loader.conf 5 742f001371SPeter Grehanor via 752f001371SPeter Grehan.Xr sysctl 8 . 762f001371SPeter GrehanThe following bits have the described effects: 772f001371SPeter Grehan.Bl -tag -width 6n -offset indent 782f001371SPeter Grehan.It 0x01 792f001371SPeter GrehanEnable informational prints. 802f001371SPeter Grehan.It 0x02 812f001371SPeter GrehanEnable prints for driver errors. 822f001371SPeter Grehan.It 0x04 832f001371SPeter GrehanEnable tracing prints. 842f001371SPeter Grehan.El 852f001371SPeter Grehan.Sh SEE ALSO 862f001371SPeter Grehan.Xr virtio 4 872f001371SPeter Grehan.Sh HISTORY 882f001371SPeter GrehanThe 892f001371SPeter Grehan.Nm 902f001371SPeter Grehandriver was written by 916c899950SBaptiste Daroussin.An Bryan Venteicher Aq Mt bryanv@FreeBSD.org . 922f001371SPeter GrehanIt first appeared in 932f001371SPeter Grehan.Fx 10.0 . 94