1 .\" Copyright (c) 2012 Bryan Venteicher
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25 .\" $FreeBSD: head/share/man/man4/virtio_scsi.4 301589 2016-06-08 08:50:35Z trasz $
32 .Nd VirtIO SCSI driver
34 To compile this driver into the kernel,
35 place the following lines in your
36 kernel configuration file:
37 .Bd -ragged -offset indent
38 .Cd "device virtio_scsi"
41 Alternatively, to load the driver as a
42 module at boot time, place the following line in
44 .Bd -literal -offset indent
45 virtio_scsi_load="YES"
50 device driver provides support for VirtIO SCSI devices.
52 Tunables can be set at the
54 prompt before booting the kernel or stored in
56 .Bl -tag -width "xxxxxx"
57 .It Va hw.vtscsi.bus_reset_disable
58 In the initial QEMU release with VirtIO SCSI support, in-flight
59 operations were not aborted when stopping the device, rendering
60 bus reset ineffective.
61 This tunable disables attempts to issue reset bus commands.
62 The default value is 1.
65 To enable debugging prints from the
68 .Bd -literal -offset indent
69 hw.vtscsi.X.debug_level
72 variable, where X is the adapter number, either in
76 The following bits have the described effects:
77 .Bl -tag -width 6n -offset indent
79 Enable informational prints.
81 Enable prints for driver errors.
83 Enable tracing prints.
91 .An Bryan Venteicher Aq Mt bryanv@FreeBSD.org .