Import virtio base, PCI front-end, and net/block/balloon drivers.
Tested on Qemu/KVM, VirtualBox, and BHyVe. Currently built as modules-only on i386/amd64. Man pages not yet hooked up, pending review. Submitted by: Bryan Venteicher bryanv at daemoninthecloset dot org Reviewed by: bz MFC after: 4 weeks or so
This commit is contained in:
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Notes:
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svn path=/head/; revision=227652
91
share/man/man4/virtio.4
Normal file
91
share/man/man4/virtio.4
Normal file
@ -0,0 +1,91 @@
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.\" Copyright (c) 2011 Bryan Venteicher
|
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.\" All rights reserved.
|
||||
.\"
|
||||
.\" Redistribution and use in source and binary forms, with or without
|
||||
.\" modification, are permitted provided that the following conditions
|
||||
.\" are met:
|
||||
.\" 1. Redistributions of source code must retain the above copyright
|
||||
.\" notice, this list of conditions and the following disclaimer.
|
||||
.\" 2. Redistributions in binary form must reproduce the above copyright
|
||||
.\" notice, this list of conditions and the following disclaimer in the
|
||||
.\" documentation and/or other materials provided with the distribution.
|
||||
.\"
|
||||
.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
|
||||
.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
||||
.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
||||
.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
|
||||
.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
||||
.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
||||
.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
||||
.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
||||
.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
||||
.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
||||
.\" SUCH DAMAGE.
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||||
.\"
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.\" $FreeBSD$
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.\"
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.Dd July 4, 2011
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.Dt VIRTIO 4
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.Os
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.Sh NAME
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.Nm virtio
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.Nd VirtIO Device Support
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.Sh SYNOPSIS
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To compile VirtIO device support into the kernel, place the following lines
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in your kernel configuration file:
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.Bd -ragged -offset indent
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.Cd "device virtio"
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.Cd "device virtio_pci"
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.Ed
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.Pp
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Alternatively, to load VirtIO support as modules at boot time, place the
|
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following lines in
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.Xr loader.conf 5 :
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.Bd -literal -offset indent
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virtio_load="YES"
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virtio_pci_load="YES"
|
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.Ed
|
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.Sh DESCRIPTION
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VirtIO is a specification for para-virtualized I/O in a virtual machine (VM).
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Traditionally, the hypervisor emulated real devices such as an Ethernet
|
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interface or disk controller to provide the VM with I/O. This emulation is
|
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often inefficient.
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.Pp
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VirtIO defines an interface for efficient I/O between the hypervisor and VM.
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The
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.Xr virtio 4
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module provides a shared memory transport called a virtqueue.
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The
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.Xr virtio_pci 4
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device driver represents an emulated PCI device that the hypervisor makes
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available to the VM. This device provides the probing, configuration, and
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interrupt notifications need to interact with the hypervisor.
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.Fx
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supports the following VirtIO devices:
|
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.Bl -hang -offset indent -width xxxxxxxx
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.It Nm Ethernet
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An emulated Ethernet device is provided by the
|
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.Xr if_vtnet 4
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device driver.
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.It Nm Block
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An emulated disk controller is provided by the
|
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.Xr virtio_blk 4
|
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device driver.
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.It Nm Balloon
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A pseudo-device to allow the VM to release memory back to the hypervisor is
|
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provided by the
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.Xr virtio_balloon 4
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device driver.
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.El
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.Sh SEE ALSO
|
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.Xr if_vtnet 4 ,
|
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.Xr virtio_blk 4 ,
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.Xr virtio_balloon 4
|
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.Sh HISTORY
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Support for VirtIO first appeared in
|
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.Fx 9.0 .
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.Sh AUTHORS
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.An -nosplit
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.Fx
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support for VirtIO was first added by
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.An Bryan Venteicher Aq bryanv@daemoninthecloset.org .
|
64
share/man/man4/virtio_balloon.4
Normal file
64
share/man/man4/virtio_balloon.4
Normal file
@ -0,0 +1,64 @@
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.\" Copyright (c) 2011 Bryan Venteicher
|
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.\" All rights reserved.
|
||||
.\"
|
||||
.\" Redistribution and use in source and binary forms, with or without
|
||||
.\" modification, are permitted provided that the following conditions
|
||||
.\" are met:
|
||||
.\" 1. Redistributions of source code must retain the above copyright
|
||||
.\" notice, this list of conditions and the following disclaimer.
|
||||
.\" 2. Redistributions in binary form must reproduce the above copyright
|
||||
.\" notice, this list of conditions and the following disclaimer in the
|
||||
.\" documentation and/or other materials provided with the distribution.
|
||||
.\"
|
||||
.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
|
||||
.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
||||
.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
||||
.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
|
||||
.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
||||
.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
||||
.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
||||
.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
||||
.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
||||
.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
||||
.\" SUCH DAMAGE.
|
||||
.\"
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.\" $FreeBSD$
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.\"
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.Dd July 4, 2011
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.Dt VIRTIO_BALLOON 4
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.Os
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.Sh NAME
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.Nm virtio_balloon
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.Nd VirtIO Memory Balloon driver
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.Sh SYNOPSIS
|
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To compile this driver into the kernel,
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place the following lines in your
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kernel configuration file:
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.Bd -ragged -offset indent
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.Cd "device virtio_balloon"
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.Ed
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.Pp
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Alternatively, to load the driver as a
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module at boot time, place the following line in
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.Xr loader.conf 5 :
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.Bd -literal -offset indent
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virtio_balloon_load="YES"
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.Ed
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.Sh DESCRIPTION
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The
|
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.Nm
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device driver provides support for VirtIO memory balloon devices.
|
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.Pp
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The memory balloon allows the guest to, at the request of the
|
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hypervisor, return memory allocated to the hypervisor so it can
|
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be made available to other guests. The hypervisor can later
|
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signal the balloon to return the memory.
|
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.Sh SEE ALSO
|
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.Xr virtio 4
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.Sh HISTORY
|
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The
|
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.Nm
|
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driver was written by
|
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.An Bryan Venteicher Aq bryanv@daemoninthecloset.org .
|
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It first appeared in
|
||||
.Fx 9.0 .
|
70
share/man/man4/virtio_blk.4
Normal file
70
share/man/man4/virtio_blk.4
Normal file
@ -0,0 +1,70 @@
|
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.\" Copyright (c) 2011 Bryan Venteicher
|
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.\" All rights reserved.
|
||||
.\"
|
||||
.\" Redistribution and use in source and binary forms, with or without
|
||||
.\" modification, are permitted provided that the following conditions
|
||||
.\" are met:
|
||||
.\" 1. Redistributions of source code must retain the above copyright
|
||||
.\" notice, this list of conditions and the following disclaimer.
|
||||
.\" 2. Redistributions in binary form must reproduce the above copyright
|
||||
.\" notice, this list of conditions and the following disclaimer in the
|
||||
.\" documentation and/or other materials provided with the distribution.
|
||||
.\"
|
||||
.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
|
||||
.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
||||
.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
||||
.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
|
||||
.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
||||
.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
||||
.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
||||
.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
||||
.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
||||
.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
||||
.\" SUCH DAMAGE.
|
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.\"
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.\" $FreeBSD$
|
||||
.\"
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.Dd July 4, 2011
|
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.Dt VIRTIO_BLK 4
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.Os
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.Sh NAME
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.Nm virtio_blk
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.Nd VirtIO Block driver
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.Sh SYNOPSIS
|
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To compile this driver into the kernel,
|
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place the following lines in your
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kernel configuration file:
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||||
.Bd -ragged -offset indent
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.Cd "device virtio_blk"
|
||||
.Ed
|
||||
.Pp
|
||||
Alternatively, to load the driver as a
|
||||
module at boot time, place the following line in
|
||||
.Xr loader.conf 5 :
|
||||
.Bd -literal -offset indent
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||||
virtio_blk_load="YES"
|
||||
.Ed
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.Sh DESCRIPTION
|
||||
The
|
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.Nm
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device driver provides support for VirtIO block devices.
|
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.Pp
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.Sh LOADER TUNABLES
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Tunables can be set at the
|
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.Xr loader 8
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prompt before booting the kernel or stored in
|
||||
.Xr loader.conf 5 .
|
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.Bl -tag -width "xxxxxx"
|
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.It Va hw.vtblk.no_ident
|
||||
This tunable disables retrieving the device identification string
|
||||
from the hypervisor. The default value is 0.
|
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.El
|
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.Sh SEE ALSO
|
||||
.Xr virtio 4
|
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.Sh HISTORY
|
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The
|
||||
.Nm
|
||||
driver was written by
|
||||
.An Bryan Venteicher Aq bryanv@daemoninthecloset.org .
|
||||
It first appeared in
|
||||
.Fx 9.0 .
|
98
share/man/man4/vtnet.4
Normal file
98
share/man/man4/vtnet.4
Normal file
@ -0,0 +1,98 @@
|
||||
.\" Copyright (c) 2011 Bryan Venteicher
|
||||
.\" All rights reserved.
|
||||
.\"
|
||||
.\" Redistribution and use in source and binary forms, with or without
|
||||
.\" modification, are permitted provided that the following conditions
|
||||
.\" are met:
|
||||
.\" 1. Redistributions of source code must retain the above copyright
|
||||
.\" notice, this list of conditions and the following disclaimer.
|
||||
.\" 2. Redistributions in binary form must reproduce the above copyright
|
||||
.\" notice, this list of conditions and the following disclaimer in the
|
||||
.\" documentation and/or other materials provided with the distribution.
|
||||
.\"
|
||||
.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
|
||||
.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
||||
.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
||||
.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
|
||||
.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
||||
.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
||||
.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
||||
.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
||||
.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
||||
.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
||||
.\" SUCH DAMAGE.
|
||||
.\"
|
||||
.\" $FreeBSD$
|
||||
.\"
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.Dd July 4, 2011
|
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.Dt VTNET 4
|
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.Os
|
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.Sh NAME
|
||||
.Nm vtnet
|
||||
.Nd VirtIO Ethernet driver
|
||||
.Sh SYNOPSIS
|
||||
To compile this driver into the kernel,
|
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place the following lines in your
|
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kernel configuration file:
|
||||
.Bd -ragged -offset indent
|
||||
.Cd "device if_vtnet"
|
||||
.Ed
|
||||
.Pp
|
||||
Alternatively, to load the driver as a
|
||||
module at boot time, place the following line in
|
||||
.Xr loader.conf 5 :
|
||||
.Bd -literal -offset indent
|
||||
if_vtnet_load="YES"
|
||||
.Ed
|
||||
.Sh DESCRIPTION
|
||||
The
|
||||
.Nm
|
||||
device driver provides support for VirtIO Ethernet devices.
|
||||
.Pp
|
||||
If the hypervisor advertises the appreciate features, the
|
||||
.Nm
|
||||
driver supports TCP/UDP checksum offload for both transmit and receive,
|
||||
TCP segmentation offload (TSO), TCP large receive offload (LRO), and
|
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hardware VLAN tag stripping/insertion features, as well as a multicast
|
||||
hash filter, as well as Jumbo Frames (up to 9216 bytes), which can be
|
||||
configured via the interface MTU setting.
|
||||
Selecting an MTU larger than 1500 bytes with the
|
||||
.Xr ifconfig 8
|
||||
utility configures the adapter to receive and transmit Jumbo Frames.
|
||||
.Pp
|
||||
For more information on configuring this device, see
|
||||
.Xr ifconfig 8 .
|
||||
.El
|
||||
.Sh LOADER TUNABLES
|
||||
Tunables can be set at the
|
||||
.Xr loader 8
|
||||
prompt before booting the kernel or stored in
|
||||
.Xr loader.conf 5 .
|
||||
.Bl -tag -width "xxxxxx"
|
||||
.It Va hw.vtnet.csum_disable
|
||||
This tunable disables receive and send checksum offload. The default
|
||||
value is 0.
|
||||
.It Va hw.vtnet.tso_disable
|
||||
This tunable disables TSO. The default value is 0.
|
||||
.It Va hw.vtnet.lro_disable
|
||||
This tunable disables LRO. The default value is 0.
|
||||
.El
|
||||
.Sh SEE ALSO
|
||||
.Xr arp 4 ,
|
||||
.Xr netintro 4 ,
|
||||
.Xr ng_ether 4 ,
|
||||
.Xr vlan 4 ,
|
||||
.Xr virtio 4 ,
|
||||
.Xr ifconfig 8
|
||||
.Sh HISTORY
|
||||
The
|
||||
.Nm
|
||||
driver was written by
|
||||
.An Bryan Venteicher Aq bryanv@daemoninthecloset.org .
|
||||
It first appeared in
|
||||
.Fx 9.0 .
|
||||
.Sh CAVEATS
|
||||
The
|
||||
.Nm
|
||||
driver only supports LRO when the hypervisor advertises the
|
||||
mergeable buffer feature.
|
569
sys/dev/virtio/balloon/virtio_balloon.c
Normal file
569
sys/dev/virtio/balloon/virtio_balloon.c
Normal file
@ -0,0 +1,569 @@
|
||||
/*-
|
||||
* Copyright (c) 2011, Bryan Venteicher <bryanv@daemoninthecloset.org>
|
||||
* All rights reserved.
|
||||
*
|
||||
* Redistribution and use in source and binary forms, with or without
|
||||
* modification, are permitted provided that the following conditions
|
||||
* are met:
|
||||
* 1. Redistributions of source code must retain the above copyright
|
||||
* notice unmodified, this list of conditions, and the following
|
||||
* disclaimer.
|
||||
* 2. Redistributions in binary form must reproduce the above copyright
|
||||
* notice, this list of conditions and the following disclaimer in the
|
||||
* documentation and/or other materials provided with the distribution.
|
||||
*
|
||||
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
|
||||
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
|
||||
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
|
||||
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
|
||||
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
|
||||
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
||||
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
||||
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
||||
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
|
||||
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
||||
*/
|
||||
|
||||
/* Driver for VirtIO memory balloon devices. */
|
||||
|
||||
#include <sys/cdefs.h>
|
||||
__FBSDID("$FreeBSD$");
|
||||
|
||||
#include <sys/param.h>
|
||||
#include <sys/systm.h>
|
||||
#include <sys/kernel.h>
|
||||
#include <sys/endian.h>
|
||||
#include <sys/kthread.h>
|
||||
#include <sys/malloc.h>
|
||||
#include <sys/module.h>
|
||||
#include <sys/sglist.h>
|
||||
#include <sys/sysctl.h>
|
||||
#include <sys/lock.h>
|
||||
#include <sys/mutex.h>
|
||||
#include <sys/queue.h>
|
||||
|
||||
#include <vm/vm.h>
|
||||
#include <vm/vm_page.h>
|
||||
|
||||
#include <machine/bus.h>
|
||||
#include <machine/resource.h>
|
||||
#include <sys/bus.h>
|
||||
#include <sys/rman.h>
|
||||
|
||||
#include <dev/virtio/virtio.h>
|
||||
#include <dev/virtio/virtqueue.h>
|
||||
#include <dev/virtio/balloon/virtio_balloon.h>
|
||||
|
||||
#include "virtio_if.h"
|
||||
|
||||
struct vtballoon_softc {
|
||||
device_t vtballoon_dev;
|
||||
struct mtx vtballoon_mtx;
|
||||
uint64_t vtballoon_features;
|
||||
uint32_t vtballoon_flags;
|
||||
#define VTBALLOON_FLAG_DETACH 0x01
|
||||
|
||||
struct virtqueue *vtballoon_inflate_vq;
|
||||
struct virtqueue *vtballoon_deflate_vq;
|
||||
|
||||
uint32_t vtballoon_desired_npages;
|
||||
uint32_t vtballoon_current_npages;
|
||||
TAILQ_HEAD(,vm_page) vtballoon_pages;
|
||||
|
||||
struct proc *vtballoon_kproc;
|
||||
uint32_t *vtballoon_page_frames;
|
||||
int vtballoon_timeout;
|
||||
};
|
||||
|
||||
static struct virtio_feature_desc vtballoon_feature_desc[] = {
|
||||
{ VIRTIO_BALLOON_F_MUST_TELL_HOST, "MustTellHost" },
|
||||
{ VIRTIO_BALLOON_F_STATS_VQ, "StatsVq" },
|
||||
|
||||
{ 0, NULL }
|
||||
};
|
||||
|
||||
static int vtballoon_probe(device_t);
|
||||
static int vtballoon_attach(device_t);
|
||||
static int vtballoon_detach(device_t);
|
||||
static int vtballoon_config_change(device_t);
|
||||
|
||||
static void vtballoon_negotiate_features(struct vtballoon_softc *);
|
||||
static int vtballoon_alloc_virtqueues(struct vtballoon_softc *);
|
||||
|
||||
static int vtballoon_vq_intr(void *);
|
||||
|
||||
static void vtballoon_inflate(struct vtballoon_softc *, int);
|
||||
static void vtballoon_deflate(struct vtballoon_softc *, int);
|
||||
|
||||
static void vtballoon_send_page_frames(struct vtballoon_softc *,
|
||||
struct virtqueue *, int);
|
||||
|
||||
static void vtballoon_pop(struct vtballoon_softc *);
|
||||
static void vtballoon_stop(struct vtballoon_softc *);
|
||||
|
||||
static vm_page_t
|
||||
vtballoon_alloc_page(struct vtballoon_softc *);
|
||||
static void vtballoon_free_page(struct vtballoon_softc *, vm_page_t);
|
||||
|
||||
static int vtballoon_sleep(struct vtballoon_softc *);
|
||||
static void vtballoon_thread(void *);
|
||||
static void vtballoon_add_sysctl(struct vtballoon_softc *);
|
||||
|
||||
/* Features desired/implemented by this driver. */
|
||||
#define VTBALLOON_FEATURES 0
|
||||
|
||||
/* Timeout between retries when the balloon needs inflating. */
|
||||
#define VTBALLOON_LOWMEM_TIMEOUT hz
|
||||
|
||||
/*
|
||||
* Maximum number of pages we'll request to inflate or deflate
|
||||
* the balloon in one virtqueue request. Both Linux and NetBSD
|
||||
* have settled on 256, doing up to 1MB at a time.
|
||||
*/
|
||||
#define VTBALLOON_PAGES_PER_REQUEST 256
|
||||
|
||||
#define VTBALLOON_MTX(_sc) &(_sc)->vtballoon_mtx
|
||||
#define VTBALLOON_LOCK_INIT(_sc, _name) mtx_init(VTBALLOON_MTX((_sc)), _name, \
|
||||
"VirtIO Balloon Lock", MTX_SPIN)
|
||||
#define VTBALLOON_LOCK(_sc) mtx_lock_spin(VTBALLOON_MTX((_sc)))
|
||||
#define VTBALLOON_UNLOCK(_sc) mtx_unlock_spin(VTBALLOON_MTX((_sc)))
|
||||
#define VTBALLOON_LOCK_DESTROY(_sc) mtx_destroy(VTBALLOON_MTX((_sc)))
|
||||
|
||||
static device_method_t vtballoon_methods[] = {
|
||||
/* Device methods. */
|
||||
DEVMETHOD(device_probe, vtballoon_probe),
|
||||
DEVMETHOD(device_attach, vtballoon_attach),
|
||||
DEVMETHOD(device_detach, vtballoon_detach),
|
||||
|
||||
/* VirtIO methods. */
|
||||
DEVMETHOD(virtio_config_change, vtballoon_config_change),
|
||||
|
||||
{ 0, 0 }
|
||||
};
|
||||
|
||||
static driver_t vtballoon_driver = {
|
||||
"vtballoon",
|
||||
vtballoon_methods,
|
||||
sizeof(struct vtballoon_softc)
|
||||
};
|
||||
static devclass_t vtballoon_devclass;
|
||||
|
||||
DRIVER_MODULE(virtio_balloon, virtio_pci, vtballoon_driver,
|
||||
vtballoon_devclass, 0, 0);
|
||||
MODULE_VERSION(virtio_balloon, 1);
|
||||
MODULE_DEPEND(virtio_balloon, virtio, 1, 1, 1);
|
||||
|
||||
static int
|
||||
vtballoon_probe(device_t dev)
|
||||
{
|
||||
|
||||
if (virtio_get_device_type(dev) != VIRTIO_ID_BALLOON)
|
||||
return (ENXIO);
|
||||
|
||||
device_set_desc(dev, "VirtIO Balloon Adapter");
|
||||
|
||||
return (BUS_PROBE_DEFAULT);
|
||||
}
|
||||
|
||||
static int
|
||||
vtballoon_attach(device_t dev)
|
||||
{
|
||||
struct vtballoon_softc *sc;
|
||||
int error;
|
||||
|
||||
sc = device_get_softc(dev);
|
||||
sc->vtballoon_dev = dev;
|
||||
|
||||
VTBALLOON_LOCK_INIT(sc, device_get_nameunit(dev));
|
||||
TAILQ_INIT(&sc->vtballoon_pages);
|
||||
|
||||
vtballoon_add_sysctl(sc);
|
||||
|
||||
virtio_set_feature_desc(dev, vtballoon_feature_desc);
|
||||
vtballoon_negotiate_features(sc);
|
||||
|
||||
sc->vtballoon_page_frames = malloc(VTBALLOON_PAGES_PER_REQUEST *
|
||||
sizeof(uint32_t), M_DEVBUF, M_NOWAIT | M_ZERO);
|
||||
if (sc->vtballoon_page_frames == NULL) {
|
||||
error = ENOMEM;
|
||||
device_printf(dev,
|
||||
"cannot allocate page frame request array\n");
|
||||
goto fail;
|
||||
}
|
||||
|
||||
error = vtballoon_alloc_virtqueues(sc);
|
||||
if (error) {
|
||||
device_printf(dev, "cannot allocate virtqueues\n");
|
||||
goto fail;
|
||||
}
|
||||
|
||||
error = virtio_setup_intr(dev, INTR_TYPE_MISC);
|
||||
if (error) {
|
||||
device_printf(dev, "cannot setup virtqueue interrupts\n");
|
||||
goto fail;
|
||||
}
|
||||
|
||||
error = kproc_create(vtballoon_thread, sc, &sc->vtballoon_kproc,
|
||||
0, 0, "virtio_balloon");
|
||||
if (error) {
|
||||
device_printf(dev, "cannot create balloon kproc\n");
|
||||
goto fail;
|
||||
}
|
||||
|
||||
virtqueue_enable_intr(sc->vtballoon_inflate_vq);
|
||||
virtqueue_enable_intr(sc->vtballoon_deflate_vq);
|
||||
|
||||
fail:
|
||||
if (error)
|
||||
vtballoon_detach(dev);
|
||||
|
||||
return (error);
|
||||
}
|
||||
|
||||
static int
|
||||
vtballoon_detach(device_t dev)
|
||||
{
|
||||
struct vtballoon_softc *sc;
|
||||
|
||||
sc = device_get_softc(dev);
|
||||
|
||||
if (sc->vtballoon_kproc != NULL) {
|
||||
VTBALLOON_LOCK(sc);
|
||||
sc->vtballoon_flags |= VTBALLOON_FLAG_DETACH;
|
||||
wakeup_one(sc);
|
||||
msleep_spin(sc->vtballoon_kproc, VTBALLOON_MTX(sc),
|
||||
"vtbdth", 0);
|
||||
VTBALLOON_UNLOCK(sc);
|
||||
|
||||
sc->vtballoon_kproc = NULL;
|
||||
}
|
||||
|
||||
if (device_is_attached(dev)) {
|
||||
vtballoon_pop(sc);
|
||||
vtballoon_stop(sc);
|
||||
}
|
||||
|
||||
if (sc->vtballoon_page_frames != NULL) {
|
||||
free(sc->vtballoon_page_frames, M_DEVBUF);
|
||||
sc->vtballoon_page_frames = NULL;
|
||||
}
|
||||
|
||||
VTBALLOON_LOCK_DESTROY(sc);
|
||||
|
||||
return (0);
|
||||
}
|
||||
|
||||
static int
|
||||
vtballoon_config_change(device_t dev)
|
||||
{
|
||||
struct vtballoon_softc *sc;
|
||||
|
||||
sc = device_get_softc(dev);
|
||||
|
||||
VTBALLOON_LOCK(sc);
|
||||
wakeup_one(sc);
|
||||
VTBALLOON_UNLOCK(sc);
|
||||
|
||||
return (1);
|
||||
}
|
||||
|
||||
static void
|
||||
vtballoon_negotiate_features(struct vtballoon_softc *sc)
|
||||
{
|
||||
device_t dev;
|
||||
uint64_t features;
|
||||
|
||||
dev = sc->vtballoon_dev;
|
||||
features = virtio_negotiate_features(dev, VTBALLOON_FEATURES);
|
||||
sc->vtballoon_features = features;
|
||||
}
|
||||
|
||||
static int
|
||||
vtballoon_alloc_virtqueues(struct vtballoon_softc *sc)
|
||||
{
|
||||
device_t dev;
|
||||
struct vq_alloc_info vq_info[2];
|
||||
int nvqs;
|
||||
|
||||
dev = sc->vtballoon_dev;
|
||||
nvqs = 2;
|
||||
|
||||
VQ_ALLOC_INFO_INIT(&vq_info[0], 0, vtballoon_vq_intr, sc,
|
||||
&sc->vtballoon_inflate_vq, "%s inflate", device_get_nameunit(dev));
|
||||
|
||||
VQ_ALLOC_INFO_INIT(&vq_info[1], 0, vtballoon_vq_intr, sc,
|
||||
&sc->vtballoon_deflate_vq, "%s deflate", device_get_nameunit(dev));
|
||||
|
||||
return (virtio_alloc_virtqueues(dev, 0, nvqs, vq_info));
|
||||
}
|
||||
|
||||
static int
|
||||
vtballoon_vq_intr(void *xsc)
|
||||
{
|
||||
struct vtballoon_softc *sc;
|
||||
|
||||
sc = xsc;
|
||||
|
||||
VTBALLOON_LOCK(sc);
|
||||
wakeup_one(sc);
|
||||
VTBALLOON_UNLOCK(sc);
|
||||
|
||||
return (1);
|
||||
}
|
||||
|
||||
static void
|
||||
vtballoon_inflate(struct vtballoon_softc *sc, int npages)
|
||||
{
|
||||
struct virtqueue *vq;
|
||||
vm_page_t m;
|
||||
int i;
|
||||
|
||||
vq = sc->vtballoon_inflate_vq;
|
||||
m = NULL;
|
||||
|
||||
if (npages > VTBALLOON_PAGES_PER_REQUEST)
|
||||
npages = VTBALLOON_PAGES_PER_REQUEST;
|
||||
KASSERT(npages > 0, ("balloon doesn't need inflating?"));
|
||||
|
||||
for (i = 0; i < npages; i++) {
|
||||
if ((m = vtballoon_alloc_page(sc)) == NULL)
|
||||
break;
|
||||
|
||||
sc->vtballoon_page_frames[i] =
|
||||
VM_PAGE_TO_PHYS(m) >> VIRTIO_BALLOON_PFN_SHIFT;
|
||||
|
||||
KASSERT(m->queue == PQ_NONE, ("allocated page on queue"));
|
||||
TAILQ_INSERT_TAIL(&sc->vtballoon_pages, m, pageq);
|
||||
}
|
||||
|
||||
if (i > 0)
|
||||
vtballoon_send_page_frames(sc, vq, i);
|
||||
|
||||
if (m == NULL)
|
||||
sc->vtballoon_timeout = VTBALLOON_LOWMEM_TIMEOUT;
|
||||
}
|
||||
|
||||
static void
|
||||
vtballoon_deflate(struct vtballoon_softc *sc, int npages)
|
||||
{
|
||||
TAILQ_HEAD(, vm_page) free_pages;
|
||||
struct virtqueue *vq;
|
||||
vm_page_t m;
|
||||
int i;
|
||||
|
||||
vq = sc->vtballoon_deflate_vq;
|
||||
TAILQ_INIT(&free_pages);
|
||||
|
||||
if (npages > VTBALLOON_PAGES_PER_REQUEST)
|
||||
npages = VTBALLOON_PAGES_PER_REQUEST;
|
||||
KASSERT(npages > 0, ("balloon doesn't need deflating?"));
|
||||
|
||||
for (i = 0; i < npages; i++) {
|
||||
m = TAILQ_FIRST(&sc->vtballoon_pages);
|
||||
KASSERT(m != NULL, ("no more pages to deflate"));
|
||||
|
||||
sc->vtballoon_page_frames[i] =
|
||||
VM_PAGE_TO_PHYS(m) >> VIRTIO_BALLOON_PFN_SHIFT;
|
||||
|
||||
TAILQ_REMOVE(&sc->vtballoon_pages, m, pageq);
|
||||
TAILQ_INSERT_TAIL(&free_pages, m, pageq);
|
||||
}
|
||||
|
||||
if (i > 0) {
|
||||
/* Always tell host first before freeing the pages. */
|
||||
vtballoon_send_page_frames(sc, vq, i);
|
||||
|
||||
while ((m = TAILQ_FIRST(&free_pages)) != NULL) {
|
||||
TAILQ_REMOVE(&free_pages, m, pageq);
|
||||
vtballoon_free_page(sc, m);
|
||||
}
|
||||
}
|
||||
|
||||
KASSERT((TAILQ_EMPTY(&sc->vtballoon_pages) &&
|
||||
sc->vtballoon_current_npages == 0) ||
|
||||
(!TAILQ_EMPTY(&sc->vtballoon_pages) &&
|
||||
sc->vtballoon_current_npages != 0), ("balloon empty?"));
|
||||
}
|
||||
|
||||
static void
|
||||
vtballoon_send_page_frames(struct vtballoon_softc *sc, struct virtqueue *vq,
|
||||
int npages)
|
||||
{
|
||||
struct sglist sg;
|
||||
struct sglist_seg segs[1];
|
||||
void *c;
|
||||
int error;
|
||||
|
||||
sglist_init(&sg, 1, segs);
|
||||
|
||||
error = sglist_append(&sg, sc->vtballoon_page_frames,
|
||||
npages * sizeof(uint32_t));
|
||||
KASSERT(error == 0, ("error adding page frames to sglist"));
|
||||
|
||||
error = virtqueue_enqueue(vq, vq, &sg, 1, 0);
|
||||
KASSERT(error == 0, ("error enqueuing page frames to virtqueue"));
|
||||
|
||||
/*
|
||||
* Inflate and deflate operations are done synchronously. The
|
||||
* interrupt handler will wake us up.
|
||||
*/
|
||||
VTBALLOON_LOCK(sc);
|
||||
virtqueue_notify(vq);
|
||||
|
||||
while ((c = virtqueue_dequeue(vq, NULL)) == NULL)
|
||||
msleep_spin(sc, VTBALLOON_MTX(sc), "vtbspf", 0);
|
||||
VTBALLOON_UNLOCK(sc);
|
||||
|
||||
KASSERT(c == vq, ("unexpected balloon operation response"));
|
||||
}
|
||||
|
||||
static void
|
||||
vtballoon_pop(struct vtballoon_softc *sc)
|
||||
{
|
||||
|
||||
while (!TAILQ_EMPTY(&sc->vtballoon_pages))
|
||||
vtballoon_deflate(sc, sc->vtballoon_current_npages);
|
||||
}
|
||||
|
||||
static void
|
||||
vtballoon_stop(struct vtballoon_softc *sc)
|
||||
{
|
||||
|
||||
virtqueue_disable_intr(sc->vtballoon_inflate_vq);
|
||||
virtqueue_disable_intr(sc->vtballoon_deflate_vq);
|
||||
|
||||
virtio_stop(sc->vtballoon_dev);
|
||||
}
|
||||
|
||||
static vm_page_t
|
||||
vtballoon_alloc_page(struct vtballoon_softc *sc)
|
||||
{
|
||||
vm_page_t m;
|
||||
|
||||
m = vm_page_alloc(NULL, 0, VM_ALLOC_NORMAL | VM_ALLOC_WIRED |
|
||||
VM_ALLOC_NOOBJ);
|
||||
if (m != NULL)
|
||||
sc->vtballoon_current_npages++;
|
||||
|
||||
return (m);
|
||||
}
|
||||
|
||||
static void
|
||||
vtballoon_free_page(struct vtballoon_softc *sc, vm_page_t m)
|
||||
{
|
||||
|
||||
vm_page_unwire(m, 0);
|
||||
vm_page_free(m);
|
||||
sc->vtballoon_current_npages--;
|
||||
}
|
||||
|
||||
static uint32_t
|
||||
vtballoon_desired_size(struct vtballoon_softc *sc)
|
||||
{
|
||||
uint32_t desired;
|
||||
|
||||
desired = virtio_read_dev_config_4(sc->vtballoon_dev,
|
||||
offsetof(struct virtio_balloon_config, num_pages));
|
||||
|
||||
return (le32toh(desired));
|
||||
}
|
||||
|
||||
static void
|
||||
vtballoon_update_size(struct vtballoon_softc *sc)
|
||||
{
|
||||
|
||||
virtio_write_dev_config_4(sc->vtballoon_dev,
|
||||
offsetof(struct virtio_balloon_config, actual),
|
||||
htole32(sc->vtballoon_current_npages));
|
||||
|
||||
}
|
||||
|
||||
static int
|
||||
vtballoon_sleep(struct vtballoon_softc *sc)
|
||||
{
|
||||
int rc, timeout;
|
||||
uint32_t current, desired;
|
||||
|
||||
rc = 0;
|
||||
current = sc->vtballoon_current_npages;
|
||||
|
||||
VTBALLOON_LOCK(sc);
|
||||
for (;;) {
|
||||
if (sc->vtballoon_flags & VTBALLOON_FLAG_DETACH) {
|
||||
rc = 1;
|
||||
break;
|
||||
}
|
||||
|
||||
desired = vtballoon_desired_size(sc);
|
||||
sc->vtballoon_desired_npages = desired;
|
||||
|
||||
/*
|
||||
* If given, use non-zero timeout on the first time through
|
||||
* the loop. On subsequent times, timeout will be zero so
|
||||
* we will reevaluate the desired size of the balloon and
|
||||
* break out to retry if needed.
|
||||
*/
|
||||
timeout = sc->vtballoon_timeout;
|
||||
sc->vtballoon_timeout = 0;
|
||||
|
||||
if (current > desired)
|
||||
break;
|
||||
if (current < desired && timeout == 0)
|
||||
break;
|
||||
|
||||
msleep_spin(sc, VTBALLOON_MTX(sc), "vtbslp", timeout);
|
||||
}
|
||||
VTBALLOON_UNLOCK(sc);
|
||||
|
||||
return (rc);
|
||||
}
|
||||
|
||||
static void
|
||||
vtballoon_thread(void *xsc)
|
||||
{
|
||||
struct vtballoon_softc *sc;
|
||||
uint32_t current, desired;
|
||||
|
||||
sc = xsc;
|
||||
|
||||
for (;;) {
|
||||
if (vtballoon_sleep(sc) != 0)
|
||||
break;
|
||||
|
||||
current = sc->vtballoon_current_npages;
|
||||
desired = sc->vtballoon_desired_npages;
|
||||
|
||||
if (desired != current) {
|
||||
if (desired > current)
|
||||
vtballoon_inflate(sc, desired - current);
|
||||
else
|
||||
vtballoon_deflate(sc, current - desired);
|
||||
|
||||
vtballoon_update_size(sc);
|
||||
}
|
||||
}
|
||||
|
||||
kproc_exit(0);
|
||||
}
|
||||
|
||||
static void
|
||||
vtballoon_add_sysctl(struct vtballoon_softc *sc)
|
||||
{
|
||||
device_t dev;
|
||||
struct sysctl_ctx_list *ctx;
|
||||
struct sysctl_oid *tree;
|
||||
struct sysctl_oid_list *child;
|
||||
|
||||
dev = sc->vtballoon_dev;
|
||||
ctx = device_get_sysctl_ctx(dev);
|
||||
tree = device_get_sysctl_tree(dev);
|
||||
child = SYSCTL_CHILDREN(tree);
|
||||
|
||||
SYSCTL_ADD_UINT(ctx, child, OID_AUTO, "desired",
|
||||
CTLFLAG_RD, &sc->vtballoon_desired_npages, sizeof(uint32_t),
|
||||
"Desired balloon size in pages");
|
||||
|
||||
SYSCTL_ADD_UINT(ctx, child, OID_AUTO, "current",
|
||||
CTLFLAG_RD, &sc->vtballoon_current_npages, sizeof(uint32_t),
|
||||
"Current balloon size in pages");
|
||||
}
|
41
sys/dev/virtio/balloon/virtio_balloon.h
Normal file
41
sys/dev/virtio/balloon/virtio_balloon.h
Normal file
@ -0,0 +1,41 @@
|
||||
/*
|
||||
* This header is BSD licensed so anyone can use the definitions to implement
|
||||
* compatible drivers/servers.
|
||||
*
|
||||
* $FreeBSD$
|
||||
*/
|
||||
|
||||
#ifndef _VIRTIO_BALLOON_H
|
||||
#define _VIRTIO_BALLOON_H
|
||||
|
||||
#include <sys/types.h>
|
||||
|
||||
/* Feature bits. */
|
||||
#define VIRTIO_BALLOON_F_MUST_TELL_HOST 0x1 /* Tell before reclaiming pages */
|
||||
#define VIRTIO_BALLOON_F_STATS_VQ 0x2 /* Memory stats virtqueue */
|
||||
|
||||
/* Size of a PFN in the balloon interface. */
|
||||
#define VIRTIO_BALLOON_PFN_SHIFT 12
|
||||
|
||||
struct virtio_balloon_config {
|
||||
/* Number of pages host wants Guest to give up. */
|
||||
uint32_t num_pages;
|
||||
|
||||
/* Number of pages we've actually got in balloon. */
|
||||
uint32_t actual;
|
||||
};
|
||||
|
||||
#define VIRTIO_BALLOON_S_SWAP_IN 0 /* Amount of memory swapped in */
|
||||
#define VIRTIO_BALLOON_S_SWAP_OUT 1 /* Amount of memory swapped out */
|
||||
#define VIRTIO_BALLOON_S_MAJFLT 2 /* Number of major faults */
|
||||
#define VIRTIO_BALLOON_S_MINFLT 3 /* Number of minor faults */
|
||||
#define VIRTIO_BALLOON_S_MEMFREE 4 /* Total amount of free memory */
|
||||
#define VIRTIO_BALLOON_S_MEMTOT 5 /* Total amount of memory */
|
||||
#define VIRTIO_BALLOON_S_NR 6
|
||||
|
||||
struct virtio_balloon_stat {
|
||||
uint16_t tag;
|
||||
uint64_t val;
|
||||
} __packed;
|
||||
|
||||
#endif /* _VIRTIO_BALLOON_H */
|
1149
sys/dev/virtio/block/virtio_blk.c
Normal file
1149
sys/dev/virtio/block/virtio_blk.c
Normal file
File diff suppressed because it is too large
Load Diff
106
sys/dev/virtio/block/virtio_blk.h
Normal file
106
sys/dev/virtio/block/virtio_blk.h
Normal file
@ -0,0 +1,106 @@
|
||||
/*
|
||||
* This header is BSD licensed so anyone can use the definitions to implement
|
||||
* compatible drivers/servers.
|
||||
*
|
||||
* $FreeBSD$
|
||||
*/
|
||||
|
||||
#ifndef _VIRTIO_BLK_H
|
||||
#define _VIRTIO_BLK_H
|
||||
|
||||
#include <sys/types.h>
|
||||
|
||||
/* Feature bits */
|
||||
#define VIRTIO_BLK_F_BARRIER 0x0001 /* Does host support barriers? */
|
||||
#define VIRTIO_BLK_F_SIZE_MAX 0x0002 /* Indicates maximum segment size */
|
||||
#define VIRTIO_BLK_F_SEG_MAX 0x0004 /* Indicates maximum # of segments */
|
||||
#define VIRTIO_BLK_F_GEOMETRY 0x0010 /* Legacy geometry available */
|
||||
#define VIRTIO_BLK_F_RO 0x0020 /* Disk is read-only */
|
||||
#define VIRTIO_BLK_F_BLK_SIZE 0x0040 /* Block size of disk is available*/
|
||||
#define VIRTIO_BLK_F_SCSI 0x0080 /* Supports scsi command passthru */
|
||||
#define VIRTIO_BLK_F_FLUSH 0x0200 /* Cache flush command support */
|
||||
#define VIRTIO_BLK_F_TOPOLOGY 0x0400 /* Topology information is available */
|
||||
|
||||
#define VIRTIO_BLK_ID_BYTES 20 /* ID string length */
|
||||
|
||||
struct virtio_blk_config {
|
||||
/* The capacity (in 512-byte sectors). */
|
||||
uint64_t capacity;
|
||||
/* The maximum segment size (if VIRTIO_BLK_F_SIZE_MAX) */
|
||||
uint32_t size_max;
|
||||
/* The maximum number of segments (if VIRTIO_BLK_F_SEG_MAX) */
|
||||
uint32_t seg_max;
|
||||
/* geometry the device (if VIRTIO_BLK_F_GEOMETRY) */
|
||||
struct virtio_blk_geometry {
|
||||
uint16_t cylinders;
|
||||
uint8_t heads;
|
||||
uint8_t sectors;
|
||||
} geometry;
|
||||
|
||||
/* block size of device (if VIRTIO_BLK_F_BLK_SIZE) */
|
||||
uint32_t blk_size;
|
||||
|
||||
/* the next 4 entries are guarded by VIRTIO_BLK_F_TOPOLOGY */
|
||||
/* exponent for physical block per logical block. */
|
||||
uint8_t physical_block_exp;
|
||||
/* alignment offset in logical blocks. */
|
||||
uint8_t alignment_offset;
|
||||
/* minimum I/O size without performance penalty in logical blocks. */
|
||||
uint16_t min_io_size;
|
||||
/* optimal sustained I/O size in logical blocks. */
|
||||
uint32_t opt_io_size;
|
||||
} __packed;
|
||||
|
||||
/*
|
||||
* Command types
|
||||
*
|
||||
* Usage is a bit tricky as some bits are used as flags and some are not.
|
||||
*
|
||||
* Rules:
|
||||
* VIRTIO_BLK_T_OUT may be combined with VIRTIO_BLK_T_SCSI_CMD or
|
||||
* VIRTIO_BLK_T_BARRIER. VIRTIO_BLK_T_FLUSH is a command of its own
|
||||
* and may not be combined with any of the other flags.
|
||||
*/
|
||||
|
||||
/* These two define direction. */
|
||||
#define VIRTIO_BLK_T_IN 0
|
||||
#define VIRTIO_BLK_T_OUT 1
|
||||
|
||||
/* This bit says it's a scsi command, not an actual read or write. */
|
||||
#define VIRTIO_BLK_T_SCSI_CMD 2
|
||||
|
||||
/* Cache flush command */
|
||||
#define VIRTIO_BLK_T_FLUSH 4
|
||||
|
||||
/* Get device ID command */
|
||||
#define VIRTIO_BLK_T_GET_ID 8
|
||||
|
||||
/* Barrier before this op. */
|
||||
#define VIRTIO_BLK_T_BARRIER 0x80000000
|
||||
|
||||
/* ID string length */
|
||||
#define VIRTIO_BLK_ID_BYTES 20
|
||||
|
||||
/* This is the first element of the read scatter-gather list. */
|
||||
struct virtio_blk_outhdr {
|
||||
/* VIRTIO_BLK_T* */
|
||||
uint32_t type;
|
||||
/* io priority. */
|
||||
uint32_t ioprio;
|
||||
/* Sector (ie. 512 byte offset) */
|
||||
uint64_t sector;
|
||||
};
|
||||
|
||||
struct virtio_scsi_inhdr {
|
||||
uint32_t errors;
|
||||
uint32_t data_len;
|
||||
uint32_t sense_len;
|
||||
uint32_t residual;
|
||||
};
|
||||
|
||||
/* And this is the final byte of the write scatter-gather list. */
|
||||
#define VIRTIO_BLK_S_OK 0
|
||||
#define VIRTIO_BLK_S_IOERR 1
|
||||
#define VIRTIO_BLK_S_UNSUPP 2
|
||||
|
||||
#endif /* _VIRTIO_BLK_H */
|
2746
sys/dev/virtio/network/if_vtnet.c
Normal file
2746
sys/dev/virtio/network/if_vtnet.c
Normal file
File diff suppressed because it is too large
Load Diff
240
sys/dev/virtio/network/if_vtnetvar.h
Normal file
240
sys/dev/virtio/network/if_vtnetvar.h
Normal file
@ -0,0 +1,240 @@
|
||||
/*-
|
||||
* Copyright (c) 2011, Bryan Venteicher <bryanv@daemoninthecloset.org>
|
||||
* All rights reserved.
|
||||
*
|
||||
* Redistribution and use in source and binary forms, with or without
|
||||
* modification, are permitted provided that the following conditions
|
||||
* are met:
|
||||
* 1. Redistributions of source code must retain the above copyright
|
||||
* notice unmodified, this list of conditions, and the following
|
||||
* disclaimer.
|
||||
* 2. Redistributions in binary form must reproduce the above copyright
|
||||
* notice, this list of conditions and the following disclaimer in the
|
||||
* documentation and/or other materials provided with the distribution.
|
||||
*
|
||||
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
|
||||
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
|
||||
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
|
||||
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
|
||||
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
|
||||
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
||||
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
||||
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
||||
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
|
||||
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
||||
*
|
||||
* $FreeBSD$
|
||||
*/
|
||||
|
||||
#ifndef _IF_VTNETVAR_H
|
||||
#define _IF_VTNETVAR_H
|
||||
|
||||
struct vtnet_statistics {
|
||||
unsigned long mbuf_alloc_failed;
|
||||
|
||||
unsigned long rx_frame_too_large;
|
||||
unsigned long rx_enq_replacement_failed;
|
||||
unsigned long rx_mergeable_failed;
|
||||
unsigned long rx_csum_bad_ethtype;
|
||||
unsigned long rx_csum_bad_start;
|
||||
unsigned long rx_csum_bad_ipproto;
|
||||
unsigned long rx_csum_bad_offset;
|
||||
unsigned long rx_csum_failed;
|
||||
unsigned long rx_csum_offloaded;
|
||||
unsigned long rx_task_rescheduled;
|
||||
|
||||
unsigned long tx_csum_offloaded;
|
||||
unsigned long tx_tso_offloaded;
|
||||
unsigned long tx_csum_bad_ethtype;
|
||||
unsigned long tx_tso_bad_ethtype;
|
||||
unsigned long tx_task_rescheduled;
|
||||
};
|
||||
|
||||
struct vtnet_softc {
|
||||
device_t vtnet_dev;
|
||||
struct ifnet *vtnet_ifp;
|
||||
struct mtx vtnet_mtx;
|
||||
|
||||
uint32_t vtnet_flags;
|
||||
#define VTNET_FLAG_LINK 0x0001
|
||||
#define VTNET_FLAG_SUSPENDED 0x0002
|
||||
#define VTNET_FLAG_CTRL_VQ 0x0004
|
||||
#define VTNET_FLAG_CTRL_RX 0x0008
|
||||
#define VTNET_FLAG_VLAN_FILTER 0x0010
|
||||
#define VTNET_FLAG_TSO_ECN 0x0020
|
||||
#define VTNET_FLAG_MRG_RXBUFS 0x0040
|
||||
#define VTNET_FLAG_LRO_NOMRG 0x0080
|
||||
|
||||
struct virtqueue *vtnet_rx_vq;
|
||||
struct virtqueue *vtnet_tx_vq;
|
||||
struct virtqueue *vtnet_ctrl_vq;
|
||||
|
||||
int vtnet_hdr_size;
|
||||
int vtnet_tx_size;
|
||||
int vtnet_rx_size;
|
||||
int vtnet_rx_process_limit;
|
||||
int vtnet_rx_mbuf_size;
|
||||
int vtnet_rx_mbuf_count;
|
||||
int vtnet_if_flags;
|
||||
int vtnet_watchdog_timer;
|
||||
uint64_t vtnet_features;
|
||||
|
||||
struct taskqueue *vtnet_tq;
|
||||
struct task vtnet_rx_intr_task;
|
||||
struct task vtnet_tx_intr_task;
|
||||
struct task vtnet_cfgchg_task;
|
||||
|
||||
struct vtnet_statistics vtnet_stats;
|
||||
|
||||
struct callout vtnet_tick_ch;
|
||||
|
||||
eventhandler_tag vtnet_vlan_attach;
|
||||
eventhandler_tag vtnet_vlan_detach;
|
||||
|
||||
struct ifmedia vtnet_media;
|
||||
/*
|
||||
* Fake media type; the host does not provide us with
|
||||
* any real media information.
|
||||
*/
|
||||
#define VTNET_MEDIATYPE (IFM_ETHER | IFM_1000_T | IFM_FDX)
|
||||
char vtnet_hwaddr[ETHER_ADDR_LEN];
|
||||
|
||||
/*
|
||||
* During reset, the host's VLAN filtering table is lost. The
|
||||
* array below is used to restore all the VLANs configured on
|
||||
* this interface after a reset.
|
||||
*/
|
||||
#define VTNET_VLAN_SHADOW_SIZE (4096 / 32)
|
||||
int vtnet_nvlans;
|
||||
uint32_t vtnet_vlan_shadow[VTNET_VLAN_SHADOW_SIZE];
|
||||
|
||||
char vtnet_mtx_name[16];
|
||||
};
|
||||
|
||||
/*
|
||||
* When mergeable buffers are not negotiated, the vtnet_rx_header structure
|
||||
* below is placed at the beginning of the mbuf data. Use 4 bytes of pad to
|
||||
* both keep the VirtIO header and the data non-contiguous and to keep the
|
||||
* frame's payload 4 byte aligned.
|
||||
*
|
||||
* When mergeable buffers are negotiated, the host puts the VirtIO header in
|
||||
* the beginning of the first mbuf's data.
|
||||
*/
|
||||
#define VTNET_RX_HEADER_PAD 4
|
||||
struct vtnet_rx_header {
|
||||
struct virtio_net_hdr vrh_hdr;
|
||||
char vrh_pad[VTNET_RX_HEADER_PAD];
|
||||
} __packed;
|
||||
|
||||
/*
|
||||
* For each outgoing frame, the vtnet_tx_header below is allocated from
|
||||
* the vtnet_tx_header_zone.
|
||||
*/
|
||||
struct vtnet_tx_header {
|
||||
union {
|
||||
struct virtio_net_hdr hdr;
|
||||
struct virtio_net_hdr_mrg_rxbuf mhdr;
|
||||
} vth_uhdr;
|
||||
|
||||
struct mbuf *vth_mbuf;
|
||||
};
|
||||
|
||||
/*
|
||||
* The VirtIO specification does not place a limit on the number of MAC
|
||||
* addresses the guest driver may request to be filtered. In practice,
|
||||
* the host is constrained by available resources. To simplify this driver,
|
||||
* impose a reasonably high limit of MAC addresses we will filter before
|
||||
* falling back to promiscuous or all-multicast modes.
|
||||
*/
|
||||
#define VTNET_MAX_MAC_ENTRIES 128
|
||||
|
||||
struct vtnet_mac_table {
|
||||
uint32_t nentries;
|
||||
uint8_t macs[VTNET_MAX_MAC_ENTRIES][ETHER_ADDR_LEN];
|
||||
} __packed;
|
||||
|
||||
struct vtnet_mac_filter {
|
||||
struct vtnet_mac_table vmf_unicast;
|
||||
uint32_t vmf_pad; /* Make tables non-contiguous. */
|
||||
struct vtnet_mac_table vmf_multicast;
|
||||
};
|
||||
|
||||
/*
|
||||
* The MAC filter table is malloc(9)'d when needed. Ensure it will
|
||||
* always fit in one segment.
|
||||
*/
|
||||
CTASSERT(sizeof(struct vtnet_mac_filter) <= PAGE_SIZE);
|
||||
|
||||
#define VTNET_WATCHDOG_TIMEOUT 5
|
||||
#define VTNET_CSUM_OFFLOAD (CSUM_TCP | CSUM_UDP | CSUM_SCTP)
|
||||
|
||||
/* Features desired/implemented by this driver. */
|
||||
#define VTNET_FEATURES \
|
||||
(VIRTIO_NET_F_MAC | \
|
||||
VIRTIO_NET_F_STATUS | \
|
||||
VIRTIO_NET_F_CTRL_VQ | \
|
||||
VIRTIO_NET_F_CTRL_RX | \
|
||||
VIRTIO_NET_F_CTRL_VLAN | \
|
||||
VIRTIO_NET_F_CSUM | \
|
||||
VIRTIO_NET_F_HOST_TSO4 | \
|
||||
VIRTIO_NET_F_HOST_TSO6 | \
|
||||
VIRTIO_NET_F_HOST_ECN | \
|
||||
VIRTIO_NET_F_GUEST_CSUM | \
|
||||
VIRTIO_NET_F_GUEST_TSO4 | \
|
||||
VIRTIO_NET_F_GUEST_TSO6 | \
|
||||
VIRTIO_NET_F_GUEST_ECN | \
|
||||
VIRTIO_NET_F_MRG_RXBUF | \
|
||||
VIRTIO_RING_F_INDIRECT_DESC)
|
||||
|
||||
/*
|
||||
* The VIRTIO_NET_F_GUEST_TSO[46] features permit the host to send us
|
||||
* frames larger than 1514 bytes. We do not yet support software LRO
|
||||
* via tcp_lro_rx().
|
||||
*/
|
||||
#define VTNET_LRO_FEATURES (VIRTIO_NET_F_GUEST_TSO4 | \
|
||||
VIRTIO_NET_F_GUEST_TSO6 | VIRTIO_NET_F_GUEST_ECN)
|
||||
|
||||
#define VTNET_MAX_MTU 65536
|
||||
#define VTNET_MAX_RX_SIZE 65550
|
||||
|
||||
/*
|
||||
* Used to preallocate the Vq indirect descriptors. The first segment
|
||||
* is reserved for the header.
|
||||
*/
|
||||
#define VTNET_MIN_RX_SEGS 2
|
||||
#define VTNET_MAX_RX_SEGS 34
|
||||
#define VTNET_MAX_TX_SEGS 34
|
||||
|
||||
/*
|
||||
* Assert we can receive and transmit the maximum with regular
|
||||
* size clusters.
|
||||
*/
|
||||
CTASSERT(((VTNET_MAX_RX_SEGS - 1) * MCLBYTES) >= VTNET_MAX_RX_SIZE);
|
||||
CTASSERT(((VTNET_MAX_TX_SEGS - 1) * MCLBYTES) >= VTNET_MAX_MTU);
|
||||
|
||||
/*
|
||||
* Determine how many mbufs are in each receive buffer. For LRO without
|
||||
* mergeable descriptors, we must allocate an mbuf chain large enough to
|
||||
* hold both the vtnet_rx_header and the maximum receivable data.
|
||||
*/
|
||||
#define VTNET_NEEDED_RX_MBUFS(_sc) \
|
||||
((_sc)->vtnet_flags & VTNET_FLAG_LRO_NOMRG) == 0 ? 1 : \
|
||||
howmany(sizeof(struct vtnet_rx_header) + VTNET_MAX_RX_SIZE, \
|
||||
(_sc)->vtnet_rx_mbuf_size)
|
||||
|
||||
#define VTNET_MTX(_sc) &(_sc)->vtnet_mtx
|
||||
#define VTNET_LOCK(_sc) mtx_lock(VTNET_MTX((_sc)))
|
||||
#define VTNET_UNLOCK(_sc) mtx_unlock(VTNET_MTX((_sc)))
|
||||
#define VTNET_LOCK_DESTROY(_sc) mtx_destroy(VTNET_MTX((_sc)))
|
||||
#define VTNET_LOCK_ASSERT(_sc) mtx_assert(VTNET_MTX((_sc)), MA_OWNED)
|
||||
#define VTNET_LOCK_ASSERT_NOTOWNED(_sc) \
|
||||
mtx_assert(VTNET_MTX((_sc)), MA_NOTOWNED)
|
||||
|
||||
#define VTNET_LOCK_INIT(_sc) do { \
|
||||
snprintf((_sc)->vtnet_mtx_name, sizeof((_sc)->vtnet_mtx_name), \
|
||||
"%s", device_get_nameunit((_sc)->vtnet_dev)); \
|
||||
mtx_init(VTNET_MTX((_sc)), (_sc)->vtnet_mtx_name, \
|
||||
"VTNET Core Lock", MTX_DEF); \
|
||||
} while (0)
|
||||
|
||||
#endif /* _IF_VTNETVAR_H */
|
138
sys/dev/virtio/network/virtio_net.h
Normal file
138
sys/dev/virtio/network/virtio_net.h
Normal file
@ -0,0 +1,138 @@
|
||||
/*
|
||||
* This header is BSD licensed so anyone can use the definitions to implement
|
||||
* compatible drivers/servers.
|
||||
*
|
||||
* $FreeBSD$
|
||||
*/
|
||||
|
||||
#ifndef _VIRTIO_NET_H
|
||||
#define _VIRTIO_NET_H
|
||||
|
||||
#include <sys/types.h>
|
||||
|
||||
/* The feature bitmap for virtio net */
|
||||
#define VIRTIO_NET_F_CSUM 0x00001 /* Host handles pkts w/ partial csum */
|
||||
#define VIRTIO_NET_F_GUEST_CSUM 0x00002 /* Guest handles pkts w/ partial csum*/
|
||||
#define VIRTIO_NET_F_MAC 0x00020 /* Host has given MAC address. */
|
||||
#define VIRTIO_NET_F_GSO 0x00040 /* Host handles pkts w/ any GSO type */
|
||||
#define VIRTIO_NET_F_GUEST_TSO4 0x00080 /* Guest can handle TSOv4 in. */
|
||||
#define VIRTIO_NET_F_GUEST_TSO6 0x00100 /* Guest can handle TSOv6 in. */
|
||||
#define VIRTIO_NET_F_GUEST_ECN 0x00200 /* Guest can handle TSO[6] w/ ECN in.*/
|
||||
#define VIRTIO_NET_F_GUEST_UFO 0x00400 /* Guest can handle UFO in. */
|
||||
#define VIRTIO_NET_F_HOST_TSO4 0x00800 /* Host can handle TSOv4 in. */
|
||||
#define VIRTIO_NET_F_HOST_TSO6 0x01000 /* Host can handle TSOv6 in. */
|
||||
#define VIRTIO_NET_F_HOST_ECN 0x02000 /* Host can handle TSO[6] w/ ECN in. */
|
||||
#define VIRTIO_NET_F_HOST_UFO 0x04000 /* Host can handle UFO in. */
|
||||
#define VIRTIO_NET_F_MRG_RXBUF 0x08000 /* Host can merge receive buffers. */
|
||||
#define VIRTIO_NET_F_STATUS 0x10000 /* virtio_net_config.status available*/
|
||||
#define VIRTIO_NET_F_CTRL_VQ 0x20000 /* Control channel available */
|
||||
#define VIRTIO_NET_F_CTRL_RX 0x40000 /* Control channel RX mode support */
|
||||
#define VIRTIO_NET_F_CTRL_VLAN 0x80000 /* Control channel VLAN filtering */
|
||||
#define VIRTIO_NET_F_CTRL_RX_EXTRA 0x100000 /* Extra RX mode control support */
|
||||
|
||||
#define VIRTIO_NET_S_LINK_UP 1 /* Link is up */
|
||||
|
||||
struct virtio_net_config {
|
||||
/* The config defining mac address (if VIRTIO_NET_F_MAC) */
|
||||
uint8_t mac[ETHER_ADDR_LEN];
|
||||
/* See VIRTIO_NET_F_STATUS and VIRTIO_NET_S_* above */
|
||||
uint16_t status;
|
||||
} __packed;
|
||||
|
||||
/*
|
||||
* This is the first element of the scatter-gather list. If you don't
|
||||
* specify GSO or CSUM features, you can simply ignore the header.
|
||||
*/
|
||||
struct virtio_net_hdr {
|
||||
#define VIRTIO_NET_HDR_F_NEEDS_CSUM 1 /* Use csum_start,csum_offset*/
|
||||
uint8_t flags;
|
||||
#define VIRTIO_NET_HDR_GSO_NONE 0 /* Not a GSO frame */
|
||||
#define VIRTIO_NET_HDR_GSO_TCPV4 1 /* GSO frame, IPv4 TCP (TSO) */
|
||||
#define VIRTIO_NET_HDR_GSO_UDP 3 /* GSO frame, IPv4 UDP (UFO) */
|
||||
#define VIRTIO_NET_HDR_GSO_TCPV6 4 /* GSO frame, IPv6 TCP */
|
||||
#define VIRTIO_NET_HDR_GSO_ECN 0x80 /* TCP has ECN set */
|
||||
uint8_t gso_type;
|
||||
uint16_t hdr_len; /* Ethernet + IP + tcp/udp hdrs */
|
||||
uint16_t gso_size; /* Bytes to append to hdr_len per frame */
|
||||
uint16_t csum_start; /* Position to start checksumming from */
|
||||
uint16_t csum_offset; /* Offset after that to place checksum */
|
||||
};
|
||||
|
||||
/*
|
||||
* This is the version of the header to use when the MRG_RXBUF
|
||||
* feature has been negotiated.
|
||||
*/
|
||||
struct virtio_net_hdr_mrg_rxbuf {
|
||||
struct virtio_net_hdr hdr;
|
||||
uint16_t num_buffers; /* Number of merged rx buffers */
|
||||
};
|
||||
|
||||
/*
|
||||
* Control virtqueue data structures
|
||||
*
|
||||
* The control virtqueue expects a header in the first sg entry
|
||||
* and an ack/status response in the last entry. Data for the
|
||||
* command goes in between.
|
||||
*/
|
||||
struct virtio_net_ctrl_hdr {
|
||||
uint8_t class;
|
||||
uint8_t cmd;
|
||||
} __packed;
|
||||
|
||||
typedef uint8_t virtio_net_ctrl_ack;
|
||||
|
||||
#define VIRTIO_NET_OK 0
|
||||
#define VIRTIO_NET_ERR 1
|
||||
|
||||
/*
|
||||
* Control the RX mode, ie. promiscuous, allmulti, etc...
|
||||
* All commands require an "out" sg entry containing a 1 byte
|
||||
* state value, zero = disable, non-zero = enable. Commands
|
||||
* 0 and 1 are supported with the VIRTIO_NET_F_CTRL_RX feature.
|
||||
* Commands 2-5 are added with VIRTIO_NET_F_CTRL_RX_EXTRA.
|
||||
*/
|
||||
#define VIRTIO_NET_CTRL_RX 0
|
||||
#define VIRTIO_NET_CTRL_RX_PROMISC 0
|
||||
#define VIRTIO_NET_CTRL_RX_ALLMULTI 1
|
||||
#define VIRTIO_NET_CTRL_RX_ALLUNI 2
|
||||
#define VIRTIO_NET_CTRL_RX_NOMULTI 3
|
||||
#define VIRTIO_NET_CTRL_RX_NOUNI 4
|
||||
#define VIRTIO_NET_CTRL_RX_NOBCAST 5
|
||||
|
||||
/*
|
||||
* Control the MAC filter table.
|
||||
*
|
||||
* The MAC filter table is managed by the hypervisor, the guest should
|
||||
* assume the size is infinite. Filtering should be considered
|
||||
* non-perfect, ie. based on hypervisor resources, the guest may
|
||||
* received packets from sources not specified in the filter list.
|
||||
*
|
||||
* In addition to the class/cmd header, the TABLE_SET command requires
|
||||
* two out scatterlists. Each contains a 4 byte count of entries followed
|
||||
* by a concatenated byte stream of the ETH_ALEN MAC addresses. The
|
||||
* first sg list contains unicast addresses, the second is for multicast.
|
||||
* This functionality is present if the VIRTIO_NET_F_CTRL_RX feature
|
||||
* is available.
|
||||
*/
|
||||
struct virtio_net_ctrl_mac {
|
||||
uint32_t entries;
|
||||
uint8_t macs[][ETHER_ADDR_LEN];
|
||||
} __packed;
|
||||
|
||||
#define VIRTIO_NET_CTRL_MAC 1
|
||||
#define VIRTIO_NET_CTRL_MAC_TABLE_SET 0
|
||||
|
||||
/*
|
||||
* Control VLAN filtering
|
||||
*
|
||||
* The VLAN filter table is controlled via a simple ADD/DEL interface.
|
||||
* VLAN IDs not added may be filtered by the hypervisor. Del is the
|
||||
* opposite of add. Both commands expect an out entry containing a 2
|
||||
* byte VLAN ID. VLAN filtering is available with the
|
||||
* VIRTIO_NET_F_CTRL_VLAN feature bit.
|
||||
*/
|
||||
#define VIRTIO_NET_CTRL_VLAN 2
|
||||
#define VIRTIO_NET_CTRL_VLAN_ADD 0
|
||||
#define VIRTIO_NET_CTRL_VLAN_DEL 1
|
||||
|
||||
#endif /* _VIRTIO_NET_H */
|
1081
sys/dev/virtio/pci/virtio_pci.c
Normal file
1081
sys/dev/virtio/pci/virtio_pci.c
Normal file
File diff suppressed because it is too large
Load Diff
64
sys/dev/virtio/pci/virtio_pci.h
Normal file
64
sys/dev/virtio/pci/virtio_pci.h
Normal file
@ -0,0 +1,64 @@
|
||||
/*
|
||||
* Copyright IBM Corp. 2007
|
||||
*
|
||||
* Authors:
|
||||
* Anthony Liguori <aliguori@us.ibm.com>
|
||||
*
|
||||
* This header is BSD licensed so anyone can use the definitions to implement
|
||||
* compatible drivers/servers.
|
||||
*
|
||||
* $FreeBSD$
|
||||
*/
|
||||
|
||||
#ifndef _VIRTIO_PCI_H
|
||||
#define _VIRTIO_PCI_H
|
||||
|
||||
/* VirtIO PCI vendor/device ID. */
|
||||
#define VIRTIO_PCI_VENDORID 0x1AF4
|
||||
#define VIRTIO_PCI_DEVICEID_MIN 0x1000
|
||||
#define VIRTIO_PCI_DEVICEID_MAX 0x103F
|
||||
|
||||
/* VirtIO ABI version, this must match exactly. */
|
||||
#define VIRTIO_PCI_ABI_VERSION 0
|
||||
|
||||
/*
|
||||
* VirtIO Header, located in BAR 0.
|
||||
*/
|
||||
#define VIRTIO_PCI_HOST_FEATURES 0 /* host's supported features (32bit, RO)*/
|
||||
#define VIRTIO_PCI_GUEST_FEATURES 4 /* guest's supported features (32, RW) */
|
||||
#define VIRTIO_PCI_QUEUE_PFN 8 /* physical address of VQ (32, RW) */
|
||||
#define VIRTIO_PCI_QUEUE_NUM 12 /* number of ring entries (16, RO) */
|
||||
#define VIRTIO_PCI_QUEUE_SEL 14 /* current VQ selection (16, RW) */
|
||||
#define VIRTIO_PCI_QUEUE_NOTIFY 16 /* notify host regarding VQ (16, RW) */
|
||||
#define VIRTIO_PCI_STATUS 18 /* device status register (8, RW) */
|
||||
#define VIRTIO_PCI_ISR 19 /* interrupt status register, reading
|
||||
* also clears the register (8, RO) */
|
||||
/* Only if MSIX is enabled: */
|
||||
#define VIRTIO_MSI_CONFIG_VECTOR 20 /* configuration change vector (16, RW) */
|
||||
#define VIRTIO_MSI_QUEUE_VECTOR 22 /* vector for selected VQ notifications
|
||||
(16, RW) */
|
||||
|
||||
/* The bit of the ISR which indicates a device has an interrupt. */
|
||||
#define VIRTIO_PCI_ISR_INTR 0x1
|
||||
/* The bit of the ISR which indicates a device configuration change. */
|
||||
#define VIRTIO_PCI_ISR_CONFIG 0x2
|
||||
/* Vector value used to disable MSI for queue. */
|
||||
#define VIRTIO_MSI_NO_VECTOR 0xFFFF
|
||||
|
||||
/*
|
||||
* The remaining space is defined by each driver as the per-driver
|
||||
* configuration space.
|
||||
*/
|
||||
#define VIRTIO_PCI_CONFIG(sc) \
|
||||
(((sc)->vtpci_flags & VIRTIO_PCI_FLAG_MSIX) ? 24 : 20)
|
||||
|
||||
/*
|
||||
* How many bits to shift physical queue address written to QUEUE_PFN.
|
||||
* 12 is historical, and due to x86 page size.
|
||||
*/
|
||||
#define VIRTIO_PCI_QUEUE_ADDR_SHIFT 12
|
||||
|
||||
/* The alignment to use between consumer and producer parts of vring. */
|
||||
#define VIRTIO_PCI_VRING_ALIGN 4096
|
||||
|
||||
#endif /* _VIRTIO_PCI_H */
|
283
sys/dev/virtio/virtio.c
Normal file
283
sys/dev/virtio/virtio.c
Normal file
@ -0,0 +1,283 @@
|
||||
/*-
|
||||
* Copyright (c) 2011, Bryan Venteicher <bryanv@daemoninthecloset.org>
|
||||
* All rights reserved.
|
||||
*
|
||||
* Redistribution and use in source and binary forms, with or without
|
||||
* modification, are permitted provided that the following conditions
|
||||
* are met:
|
||||
* 1. Redistributions of source code must retain the above copyright
|
||||
* notice unmodified, this list of conditions, and the following
|
||||
* disclaimer.
|
||||
* 2. Redistributions in binary form must reproduce the above copyright
|
||||
* notice, this list of conditions and the following disclaimer in the
|
||||
* documentation and/or other materials provided with the distribution.
|
||||
*
|
||||
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
|
||||
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
|
||||
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
|
||||
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
|
||||
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
|
||||
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
||||
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
||||
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
||||
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
|
||||
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
||||
*/
|
||||
|
||||
#include <sys/cdefs.h>
|
||||
__FBSDID("$FreeBSD$");
|
||||
|
||||
#include <sys/param.h>
|
||||
#include <sys/systm.h>
|
||||
#include <sys/kernel.h>
|
||||
#include <sys/malloc.h>
|
||||
#include <sys/module.h>
|
||||
#include <sys/sbuf.h>
|
||||
|
||||
#include <machine/bus.h>
|
||||
#include <machine/resource.h>
|
||||
#include <machine/_inttypes.h>
|
||||
#include <sys/bus.h>
|
||||
#include <sys/rman.h>
|
||||
|
||||
#include <dev/virtio/virtio.h>
|
||||
#include <dev/virtio/virtqueue.h>
|
||||
|
||||
#include "virtio_bus_if.h"
|
||||
|
||||
static int virtio_modevent(module_t, int, void *);
|
||||
static const char *virtio_feature_name(uint64_t, struct virtio_feature_desc *);
|
||||
|
||||
static struct virtio_ident {
|
||||
uint16_t devid;
|
||||
char *name;
|
||||
} virtio_ident_table[] = {
|
||||
{ VIRTIO_ID_NETWORK, "Network" },
|
||||
{ VIRTIO_ID_BLOCK, "Block" },
|
||||
{ VIRTIO_ID_CONSOLE, "Console" },
|
||||
{ VIRTIO_ID_ENTROPY, "Entropy" },
|
||||
{ VIRTIO_ID_BALLOON, "Balloon" },
|
||||
{ VIRTIO_ID_IOMEMORY, "IOMemory" },
|
||||
{ VIRTIO_ID_9P, "9P Transport" },
|
||||
|
||||
{ 0, NULL }
|
||||
};
|
||||
|
||||
/* Device independent features. */
|
||||
static struct virtio_feature_desc virtio_common_feature_desc[] = {
|
||||
{ VIRTIO_F_NOTIFY_ON_EMPTY, "NotifyOnEmpty" },
|
||||
{ VIRTIO_RING_F_INDIRECT_DESC, "RingIndirect" },
|
||||
{ VIRTIO_RING_F_EVENT_IDX, "EventIdx" },
|
||||
{ VIRTIO_F_BAD_FEATURE, "BadFeature" },
|
||||
|
||||
{ 0, NULL }
|
||||
};
|
||||
|
||||
const char *
|
||||
virtio_device_name(uint16_t devid)
|
||||
{
|
||||
struct virtio_ident *ident;
|
||||
|
||||
for (ident = virtio_ident_table; ident->name != NULL; ident++) {
|
||||
if (ident->devid == devid)
|
||||
return (ident->name);
|
||||
}
|
||||
|
||||
return (NULL);
|
||||
}
|
||||
|
||||
int
|
||||
virtio_get_device_type(device_t dev)
|
||||
{
|
||||
uintptr_t devtype;
|
||||
|
||||
devtype = -1;
|
||||
|
||||
BUS_READ_IVAR(device_get_parent(dev), dev,
|
||||
VIRTIO_IVAR_DEVTYPE, &devtype);
|
||||
|
||||
return ((int) devtype);
|
||||
}
|
||||
|
||||
void
|
||||
virtio_set_feature_desc(device_t dev,
|
||||
struct virtio_feature_desc *feature_desc)
|
||||
{
|
||||
|
||||
BUS_WRITE_IVAR(device_get_parent(dev), dev,
|
||||
VIRTIO_IVAR_FEATURE_DESC, (uintptr_t) feature_desc);
|
||||
}
|
||||
|
||||
void
|
||||
virtio_describe(device_t dev, const char *msg,
|
||||
uint64_t features, struct virtio_feature_desc *feature_desc)
|
||||
{
|
||||
struct sbuf sb;
|
||||
uint64_t val;
|
||||
char *buf;
|
||||
const char *name;
|
||||
int n;
|
||||
|
||||
if ((buf = malloc(512, M_TEMP, M_NOWAIT)) == NULL) {
|
||||
device_printf(dev, "%s features: 0x%"PRIx64"\n", msg,
|
||||
features);
|
||||
return;
|
||||
}
|
||||
|
||||
sbuf_new(&sb, buf, 512, SBUF_FIXEDLEN);
|
||||
sbuf_printf(&sb, "%s features: 0x%"PRIx64, msg, features);
|
||||
|
||||
for (n = 0, val = 1ULL << 63; val != 0; val >>= 1) {
|
||||
/*
|
||||
* BAD_FEATURE is used to detect broken Linux clients
|
||||
* and therefore is not applicable to FreeBSD.
|
||||
*/
|
||||
if (((features & val) == 0) || val == VIRTIO_F_BAD_FEATURE)
|
||||
continue;
|
||||
|
||||
if (n++ == 0)
|
||||
sbuf_cat(&sb, " <");
|
||||
else
|
||||
sbuf_cat(&sb, ",");
|
||||
|
||||
name = NULL;
|
||||
if (feature_desc != NULL)
|
||||
name = virtio_feature_name(val, feature_desc);
|
||||
if (name == NULL)
|
||||
name = virtio_feature_name(val,
|
||||
virtio_common_feature_desc);
|
||||
|
||||
if (name == NULL)
|
||||
sbuf_printf(&sb, "0x%"PRIx64, val);
|
||||
else
|
||||
sbuf_cat(&sb, name);
|
||||
}
|
||||
|
||||
if (n > 0)
|
||||
sbuf_cat(&sb, ">");
|
||||
|
||||
#if __FreeBSD_version < 900020
|
||||
sbuf_finish(&sb);
|
||||
if (sbuf_overflowed(&sb) == 0)
|
||||
#else
|
||||
if (sbuf_finish(&sb) == 0)
|
||||
#endif
|
||||
device_printf(dev, "%s\n", sbuf_data(&sb));
|
||||
|
||||
sbuf_delete(&sb);
|
||||
free(buf, M_TEMP);
|
||||
}
|
||||
|
||||
static const char *
|
||||
virtio_feature_name(uint64_t val, struct virtio_feature_desc *feature_desc)
|
||||
{
|
||||
int i;
|
||||
|
||||
for (i = 0; feature_desc[i].vfd_val != 0; i++)
|
||||
if (val == feature_desc[i].vfd_val)
|
||||
return (feature_desc[i].vfd_str);
|
||||
|
||||
return (NULL);
|
||||
}
|
||||
|
||||
/*
|
||||
* VirtIO bus method wrappers.
|
||||
*/
|
||||
|
||||
uint64_t
|
||||
virtio_negotiate_features(device_t dev, uint64_t child_features)
|
||||
{
|
||||
|
||||
return (VIRTIO_BUS_NEGOTIATE_FEATURES(device_get_parent(dev),
|
||||
child_features));
|
||||
}
|
||||
|
||||
int
|
||||
virtio_alloc_virtqueues(device_t dev, int flags, int nvqs,
|
||||
struct vq_alloc_info *info)
|
||||
{
|
||||
|
||||
return (VIRTIO_BUS_ALLOC_VIRTQUEUES(device_get_parent(dev), flags,
|
||||
nvqs, info));
|
||||
}
|
||||
|
||||
int
|
||||
virtio_setup_intr(device_t dev, enum intr_type type)
|
||||
{
|
||||
|
||||
return (VIRTIO_BUS_SETUP_INTR(device_get_parent(dev), type));
|
||||
}
|
||||
|
||||
int
|
||||
virtio_with_feature(device_t dev, uint64_t feature)
|
||||
{
|
||||
|
||||
return (VIRTIO_BUS_WITH_FEATURE(device_get_parent(dev), feature));
|
||||
}
|
||||
|
||||
void
|
||||
virtio_stop(device_t dev)
|
||||
{
|
||||
|
||||
VIRTIO_BUS_STOP(device_get_parent(dev));
|
||||
}
|
||||
|
||||
int
|
||||
virtio_reinit(device_t dev, uint64_t features)
|
||||
{
|
||||
|
||||
return (VIRTIO_BUS_REINIT(device_get_parent(dev), features));
|
||||
}
|
||||
|
||||
void
|
||||
virtio_reinit_complete(device_t dev)
|
||||
{
|
||||
|
||||
VIRTIO_BUS_REINIT_COMPLETE(device_get_parent(dev));
|
||||
}
|
||||
|
||||
void
|
||||
virtio_read_device_config(device_t dev, bus_size_t offset, void *dst, int len)
|
||||
{
|
||||
|
||||
VIRTIO_BUS_READ_DEVICE_CONFIG(device_get_parent(dev),
|
||||
offset, dst, len);
|
||||
}
|
||||
|
||||
void
|
||||
virtio_write_device_config(device_t dev, bus_size_t offset, void *dst, int len)
|
||||
{
|
||||
|
||||
VIRTIO_BUS_WRITE_DEVICE_CONFIG(device_get_parent(dev),
|
||||
offset, dst, len);
|
||||
}
|
||||
|
||||
static int
|
||||
virtio_modevent(module_t mod, int type, void *unused)
|
||||
{
|
||||
int error;
|
||||
|
||||
error = 0;
|
||||
|
||||
switch (type) {
|
||||
case MOD_LOAD:
|
||||
case MOD_QUIESCE:
|
||||
case MOD_UNLOAD:
|
||||
case MOD_SHUTDOWN:
|
||||
break;
|
||||
default:
|
||||
error = EOPNOTSUPP;
|
||||
break;
|
||||
}
|
||||
|
||||
return (error);
|
||||
}
|
||||
|
||||
static moduledata_t virtio_mod = {
|
||||
"virtio",
|
||||
virtio_modevent,
|
||||
0
|
||||
};
|
||||
|
||||
DECLARE_MODULE(virtio, virtio_mod, SI_SUB_DRIVERS, SI_ORDER_FIRST);
|
||||
MODULE_VERSION(virtio, 1);
|
130
sys/dev/virtio/virtio.h
Normal file
130
sys/dev/virtio/virtio.h
Normal file
@ -0,0 +1,130 @@
|
||||
/*
|
||||
* This header is BSD licensed so anyone can use the definitions to implement
|
||||
* compatible drivers/servers.
|
||||
*
|
||||
* $FreeBSD$
|
||||
*/
|
||||
|
||||
#ifndef _VIRTIO_H_
|
||||
#define _VIRTIO_H_
|
||||
|
||||
#include <sys/types.h>
|
||||
|
||||
struct vq_alloc_info;
|
||||
|
||||
/* VirtIO device IDs. */
|
||||
#define VIRTIO_ID_NETWORK 0x01
|
||||
#define VIRTIO_ID_BLOCK 0x02
|
||||
#define VIRTIO_ID_CONSOLE 0x03
|
||||
#define VIRTIO_ID_ENTROPY 0x04
|
||||
#define VIRTIO_ID_BALLOON 0x05
|
||||
#define VIRTIO_ID_IOMEMORY 0x06
|
||||
#define VIRTIO_ID_9P 0x09
|
||||
|
||||
/* Status byte for guest to report progress. */
|
||||
#define VIRTIO_CONFIG_STATUS_RESET 0x00
|
||||
#define VIRTIO_CONFIG_STATUS_ACK 0x01
|
||||
#define VIRTIO_CONFIG_STATUS_DRIVER 0x02
|
||||
#define VIRTIO_CONFIG_STATUS_DRIVER_OK 0x04
|
||||
#define VIRTIO_CONFIG_STATUS_FAILED 0x80
|
||||
|
||||
/*
|
||||
* Generate interrupt when the virtqueue ring is
|
||||
* completely used, even if we've suppressed them.
|
||||
*/
|
||||
#define VIRTIO_F_NOTIFY_ON_EMPTY (1 << 24)
|
||||
|
||||
/*
|
||||
* The guest should never negotiate this feature; it
|
||||
* is used to detect faulty drivers.
|
||||
*/
|
||||
#define VIRTIO_F_BAD_FEATURE (1 << 30)
|
||||
|
||||
/*
|
||||
* Some VirtIO feature bits (currently bits 28 through 31) are
|
||||
* reserved for the transport being used (eg. virtio_ring), the
|
||||
* rest are per-device feature bits.
|
||||
*/
|
||||
#define VIRTIO_TRANSPORT_F_START 28
|
||||
#define VIRTIO_TRANSPORT_F_END 32
|
||||
|
||||
/*
|
||||
* Maximum number of virtqueues per device.
|
||||
*/
|
||||
#define VIRTIO_MAX_VIRTQUEUES 8
|
||||
|
||||
/*
|
||||
* Each virtqueue indirect descriptor list must be physically contiguous.
|
||||
* To allow us to malloc(9) each list individually, limit the number
|
||||
* supported to what will fit in one page. With 4KB pages, this is a limit
|
||||
* of 256 descriptors. If there is ever a need for more, we can switch to
|
||||
* contigmalloc(9) for the larger allocations, similar to what
|
||||
* bus_dmamem_alloc(9) does.
|
||||
*
|
||||
* Note the sizeof(struct vring_desc) is 16 bytes.
|
||||
*/
|
||||
#define VIRTIO_MAX_INDIRECT ((int) (PAGE_SIZE / 16))
|
||||
|
||||
/*
|
||||
* VirtIO instance variables indices.
|
||||
*/
|
||||
#define VIRTIO_IVAR_DEVTYPE 1
|
||||
#define VIRTIO_IVAR_FEATURE_DESC 2
|
||||
|
||||
struct virtio_feature_desc {
|
||||
uint64_t vfd_val;
|
||||
char *vfd_str;
|
||||
};
|
||||
|
||||
const char *virtio_device_name(uint16_t devid);
|
||||
int virtio_get_device_type(device_t dev);
|
||||
void virtio_set_feature_desc(device_t dev,
|
||||
struct virtio_feature_desc *feature_desc);
|
||||
void virtio_describe(device_t dev, const char *msg,
|
||||
uint64_t features, struct virtio_feature_desc *feature_desc);
|
||||
|
||||
/*
|
||||
* VirtIO Bus Methods.
|
||||
*/
|
||||
uint64_t virtio_negotiate_features(device_t dev, uint64_t child_features);
|
||||
int virtio_alloc_virtqueues(device_t dev, int flags, int nvqs,
|
||||
struct vq_alloc_info *info);
|
||||
int virtio_setup_intr(device_t dev, enum intr_type type);
|
||||
int virtio_with_feature(device_t dev, uint64_t feature);
|
||||
void virtio_stop(device_t dev);
|
||||
int virtio_reinit(device_t dev, uint64_t features);
|
||||
void virtio_reinit_complete(device_t dev);
|
||||
|
||||
/*
|
||||
* Read/write a variable amount from the device specific (ie, network)
|
||||
* configuration region. This region is encoded in the same endian as
|
||||
* the guest.
|
||||
*/
|
||||
void virtio_read_device_config(device_t dev, bus_size_t offset,
|
||||
void *dst, int length);
|
||||
void virtio_write_device_config(device_t dev, bus_size_t offset,
|
||||
void *src, int length);
|
||||
|
||||
/* Inlined device specific read/write functions for common lengths. */
|
||||
#define VIRTIO_RDWR_DEVICE_CONFIG(size, type) \
|
||||
static inline type \
|
||||
__CONCAT(virtio_read_dev_config_,size)(device_t dev, \
|
||||
bus_size_t offset) \
|
||||
{ \
|
||||
type val; \
|
||||
virtio_read_device_config(dev, offset, &val, sizeof(type)); \
|
||||
return (val); \
|
||||
} \
|
||||
\
|
||||
static inline void \
|
||||
__CONCAT(virtio_write_dev_config_,size)(device_t dev, \
|
||||
bus_size_t offset, type val) \
|
||||
{ \
|
||||
virtio_write_device_config(dev, offset, &val, sizeof(type)); \
|
||||
}
|
||||
|
||||
VIRTIO_RDWR_DEVICE_CONFIG(1, uint8_t);
|
||||
VIRTIO_RDWR_DEVICE_CONFIG(2, uint16_t);
|
||||
VIRTIO_RDWR_DEVICE_CONFIG(4, uint32_t);
|
||||
|
||||
#endif /* _VIRTIO_H_ */
|
92
sys/dev/virtio/virtio_bus_if.m
Normal file
92
sys/dev/virtio/virtio_bus_if.m
Normal file
@ -0,0 +1,92 @@
|
||||
#-
|
||||
# Copyright (c) 2011, Bryan Venteicher <bryanv@daemoninthecloset.org>
|
||||
# All rights reserved.
|
||||
#
|
||||
# Redistribution and use in source and binary forms, with or without
|
||||
# modification, are permitted provided that the following conditions
|
||||
# are met:
|
||||
# 1. Redistributions of source code must retain the above copyright
|
||||
# notice, this list of conditions and the following disclaimer.
|
||||
# 2. Redistributions in binary form must reproduce the above copyright
|
||||
# notice, this list of conditions and the following disclaimer in the
|
||||
# documentation and/or other materials provided with the distribution.
|
||||
#
|
||||
# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
|
||||
# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
||||
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
||||
# ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
|
||||
# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
||||
# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
||||
# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
||||
# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
||||
# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
||||
# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
||||
# SUCH DAMAGE.
|
||||
#
|
||||
# $FreeBSD$
|
||||
|
||||
#include <sys/bus.h>
|
||||
#include <machine/bus.h>
|
||||
|
||||
INTERFACE virtio_bus;
|
||||
|
||||
HEADER {
|
||||
struct vq_alloc_info;
|
||||
};
|
||||
|
||||
METHOD uint64_t negotiate_features {
|
||||
device_t dev;
|
||||
uint64_t child_features;
|
||||
};
|
||||
|
||||
METHOD int with_feature {
|
||||
device_t dev;
|
||||
uint64_t feature;
|
||||
};
|
||||
|
||||
METHOD int alloc_virtqueues {
|
||||
device_t dev;
|
||||
int flags;
|
||||
int nvqs;
|
||||
struct vq_alloc_info *info;
|
||||
};
|
||||
HEADER {
|
||||
#define VIRTIO_ALLOC_VQS_DISABLE_MSIX 0x1
|
||||
};
|
||||
|
||||
METHOD int setup_intr {
|
||||
device_t dev;
|
||||
enum intr_type type;
|
||||
};
|
||||
|
||||
METHOD void stop {
|
||||
device_t dev;
|
||||
};
|
||||
|
||||
METHOD int reinit {
|
||||
device_t dev;
|
||||
uint64_t features;
|
||||
};
|
||||
|
||||
METHOD void reinit_complete {
|
||||
device_t dev;
|
||||
};
|
||||
|
||||
METHOD void notify_vq {
|
||||
device_t dev;
|
||||
uint16_t queue;
|
||||
};
|
||||
|
||||
METHOD void read_device_config {
|
||||
device_t dev;
|
||||
bus_size_t offset;
|
||||
void *dst;
|
||||
int len;
|
||||
};
|
||||
|
||||
METHOD void write_device_config {
|
||||
device_t dev;
|
||||
bus_size_t offset;
|
||||
void *src;
|
||||
int len;
|
||||
};
|
43
sys/dev/virtio/virtio_if.m
Normal file
43
sys/dev/virtio/virtio_if.m
Normal file
@ -0,0 +1,43 @@
|
||||
#-
|
||||
# Copyright (c) 2011, Bryan Venteicher <bryanv@daemoninthecloset.org>
|
||||
# All rights reserved.
|
||||
#
|
||||
# Redistribution and use in source and binary forms, with or without
|
||||
# modification, are permitted provided that the following conditions
|
||||
# are met:
|
||||
# 1. Redistributions of source code must retain the above copyright
|
||||
# notice, this list of conditions and the following disclaimer.
|
||||
# 2. Redistributions in binary form must reproduce the above copyright
|
||||
# notice, this list of conditions and the following disclaimer in the
|
||||
# documentation and/or other materials provided with the distribution.
|
||||
#
|
||||
# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
|
||||
# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
||||
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
||||
# ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
|
||||
# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
||||
# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
||||
# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
||||
# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
||||
# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
||||
# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
||||
# SUCH DAMAGE.
|
||||
#
|
||||
# $FreeBSD$
|
||||
|
||||
#include <sys/bus.h>
|
||||
|
||||
INTERFACE virtio;
|
||||
|
||||
CODE {
|
||||
static int
|
||||
virtio_default_config_change(device_t dev)
|
||||
{
|
||||
/* Return that we've handled the change. */
|
||||
return (1);
|
||||
}
|
||||
};
|
||||
|
||||
METHOD int config_change {
|
||||
device_t dev;
|
||||
} DEFAULT virtio_default_config_change;
|
119
sys/dev/virtio/virtio_ring.h
Normal file
119
sys/dev/virtio/virtio_ring.h
Normal file
@ -0,0 +1,119 @@
|
||||
/*
|
||||
* This header is BSD licensed so anyone can use the definitions
|
||||
* to implement compatible drivers/servers.
|
||||
*
|
||||
* Copyright Rusty Russell IBM Corporation 2007.
|
||||
*/
|
||||
/* $FreeBSD$ */
|
||||
|
||||
#ifndef VIRTIO_RING_H
|
||||
#define VIRTIO_RING_H
|
||||
|
||||
#include <sys/types.h>
|
||||
|
||||
/* This marks a buffer as continuing via the next field. */
|
||||
#define VRING_DESC_F_NEXT 1
|
||||
/* This marks a buffer as write-only (otherwise read-only). */
|
||||
#define VRING_DESC_F_WRITE 2
|
||||
/* This means the buffer contains a list of buffer descriptors. */
|
||||
#define VRING_DESC_F_INDIRECT 4
|
||||
|
||||
/* The Host uses this in used->flags to advise the Guest: don't kick me
|
||||
* when you add a buffer. It's unreliable, so it's simply an
|
||||
* optimization. Guest will still kick if it's out of buffers. */
|
||||
#define VRING_USED_F_NO_NOTIFY 1
|
||||
/* The Guest uses this in avail->flags to advise the Host: don't
|
||||
* interrupt me when you consume a buffer. It's unreliable, so it's
|
||||
* simply an optimization. */
|
||||
#define VRING_AVAIL_F_NO_INTERRUPT 1
|
||||
|
||||
/* VirtIO ring descriptors: 16 bytes.
|
||||
* These can chain together via "next". */
|
||||
struct vring_desc {
|
||||
/* Address (guest-physical). */
|
||||
uint64_t addr;
|
||||
/* Length. */
|
||||
uint32_t len;
|
||||
/* The flags as indicated above. */
|
||||
uint16_t flags;
|
||||
/* We chain unused descriptors via this, too. */
|
||||
uint16_t next;
|
||||
};
|
||||
|
||||
struct vring_avail {
|
||||
uint16_t flags;
|
||||
uint16_t idx;
|
||||
uint16_t ring[0];
|
||||
};
|
||||
|
||||
/* uint32_t is used here for ids for padding reasons. */
|
||||
struct vring_used_elem {
|
||||
/* Index of start of used descriptor chain. */
|
||||
uint32_t id;
|
||||
/* Total length of the descriptor chain which was written to. */
|
||||
uint32_t len;
|
||||
};
|
||||
|
||||
struct vring_used {
|
||||
uint16_t flags;
|
||||
uint16_t idx;
|
||||
struct vring_used_elem ring[0];
|
||||
};
|
||||
|
||||
struct vring {
|
||||
unsigned int num;
|
||||
|
||||
struct vring_desc *desc;
|
||||
struct vring_avail *avail;
|
||||
struct vring_used *used;
|
||||
};
|
||||
|
||||
/* The standard layout for the ring is a continuous chunk of memory which
|
||||
* looks like this. We assume num is a power of 2.
|
||||
*
|
||||
* struct vring {
|
||||
* // The actual descriptors (16 bytes each)
|
||||
* struct vring_desc desc[num];
|
||||
*
|
||||
* // A ring of available descriptor heads with free-running index.
|
||||
* __u16 avail_flags;
|
||||
* __u16 avail_idx;
|
||||
* __u16 available[num];
|
||||
*
|
||||
* // Padding to the next align boundary.
|
||||
* char pad[];
|
||||
*
|
||||
* // A ring of used descriptor heads with free-running index.
|
||||
* __u16 used_flags;
|
||||
* __u16 used_idx;
|
||||
* struct vring_used_elem used[num];
|
||||
* };
|
||||
*
|
||||
* NOTE: for VirtIO PCI, align is 4096.
|
||||
*/
|
||||
|
||||
static inline int
|
||||
vring_size(unsigned int num, unsigned long align)
|
||||
{
|
||||
int size;
|
||||
|
||||
size = num * sizeof(struct vring_desc);
|
||||
size += sizeof(struct vring_avail) + (num * sizeof(uint16_t));
|
||||
size = (size + align - 1) & ~(align - 1);
|
||||
size += sizeof(struct vring_used) +
|
||||
(num * sizeof(struct vring_used_elem));
|
||||
return (size);
|
||||
}
|
||||
|
||||
static inline void
|
||||
vring_init(struct vring *vr, unsigned int num, uint8_t *p,
|
||||
unsigned long align)
|
||||
{
|
||||
vr->num = num;
|
||||
vr->desc = (struct vring_desc *) p;
|
||||
vr->avail = (struct vring_avail *) (p +
|
||||
num * sizeof(struct vring_desc));
|
||||
vr->used = (void *)
|
||||
(((unsigned long) &vr->avail->ring[num] + align-1) & ~(align-1));
|
||||
}
|
||||
#endif /* VIRTIO_RING_H */
|
755
sys/dev/virtio/virtqueue.c
Normal file
755
sys/dev/virtio/virtqueue.c
Normal file
@ -0,0 +1,755 @@
|
||||
/*-
|
||||
* Copyright (c) 2011, Bryan Venteicher <bryanv@daemoninthecloset.org>
|
||||
* All rights reserved.
|
||||
*
|
||||
* Redistribution and use in source and binary forms, with or without
|
||||
* modification, are permitted provided that the following conditions
|
||||
* are met:
|
||||
* 1. Redistributions of source code must retain the above copyright
|
||||
* notice unmodified, this list of conditions, and the following
|
||||
* disclaimer.
|
||||
* 2. Redistributions in binary form must reproduce the above copyright
|
||||
* notice, this list of conditions and the following disclaimer in the
|
||||
* documentation and/or other materials provided with the distribution.
|
||||
*
|
||||
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
|
||||
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
|
||||
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
|
||||
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
|
||||
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
|
||||
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
||||
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
||||
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
||||
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
|
||||
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
||||
*/
|
||||
|
||||
/*
|
||||
* Implements the virtqueue interface as basically described
|
||||
* in the original VirtIO paper.
|
||||
*/
|
||||
|
||||
#include <sys/cdefs.h>
|
||||
__FBSDID("$FreeBSD$");
|
||||
|
||||
#include <sys/param.h>
|
||||
#include <sys/systm.h>
|
||||
#include <sys/kernel.h>
|
||||
#include <sys/malloc.h>
|
||||
#include <sys/sglist.h>
|
||||
#include <vm/vm.h>
|
||||
#include <vm/pmap.h>
|
||||
|
||||
#include <machine/cpu.h>
|
||||
#include <machine/bus.h>
|
||||
#include <machine/atomic.h>
|
||||
#include <machine/resource.h>
|
||||
#include <sys/bus.h>
|
||||
#include <sys/rman.h>
|
||||
|
||||
#include <dev/virtio/virtio.h>
|
||||
#include <dev/virtio/virtqueue.h>
|
||||
#include <dev/virtio/virtio_ring.h>
|
||||
|
||||
#include "virtio_bus_if.h"
|
||||
|
||||
struct virtqueue {
|
||||
device_t vq_dev;
|
||||
char vq_name[VIRTQUEUE_MAX_NAME_SZ];
|
||||
uint16_t vq_queue_index;
|
||||
uint16_t vq_nentries;
|
||||
uint32_t vq_flags;
|
||||
#define VIRTQUEUE_FLAG_INDIRECT 0x0001
|
||||
|
||||
int vq_alignment;
|
||||
int vq_ring_size;
|
||||
void *vq_ring_mem;
|
||||
int vq_max_indirect_size;
|
||||
int vq_indirect_mem_size;
|
||||
virtqueue_intr_t *vq_intrhand;
|
||||
void *vq_intrhand_arg;
|
||||
|
||||
struct vring vq_ring;
|
||||
uint16_t vq_free_cnt;
|
||||
uint16_t vq_queued_cnt;
|
||||
/*
|
||||
* Head of the free chain in the descriptor table. If
|
||||
* there are no free descriptors, this will be set to
|
||||
* VQ_RING_DESC_CHAIN_END.
|
||||
*/
|
||||
uint16_t vq_desc_head_idx;
|
||||
/*
|
||||
* Last consumed descriptor in the used table,
|
||||
* trails vq_ring.used->idx.
|
||||
*/
|
||||
uint16_t vq_used_cons_idx;
|
||||
|
||||
struct vq_desc_extra {
|
||||
void *cookie;
|
||||
struct vring_desc *indirect;
|
||||
vm_paddr_t indirect_paddr;
|
||||
uint16_t ndescs;
|
||||
} vq_descx[0];
|
||||
};
|
||||
|
||||
/*
|
||||
* The maximum virtqueue size is 2^15. Use that value as the end of
|
||||
* descriptor chain terminator since it will never be a valid index
|
||||
* in the descriptor table. This is used to verify we are correctly
|
||||
* handling vq_free_cnt.
|
||||
*/
|
||||
#define VQ_RING_DESC_CHAIN_END 32768
|
||||
|
||||
#define VQASSERT(_vq, _exp, _msg, ...) \
|
||||
KASSERT((_exp),("%s: %s - "_msg, __func__, (_vq)->vq_name, \
|
||||
##__VA_ARGS__))
|
||||
|
||||
#define VQ_RING_ASSERT_VALID_IDX(_vq, _idx) \
|
||||
VQASSERT((_vq), (_idx) < (_vq)->vq_nentries, \
|
||||
"invalid ring index: %d, max: %d", (_idx), \
|
||||
(_vq)->vq_nentries)
|
||||
|
||||
#define VQ_RING_ASSERT_CHAIN_TERM(_vq) \
|
||||
VQASSERT((_vq), (_vq)->vq_desc_head_idx == \
|
||||
VQ_RING_DESC_CHAIN_END, "full ring terminated " \
|
||||
"incorrectly: head idx: %d", (_vq)->vq_desc_head_idx)
|
||||
|
||||
static int virtqueue_init_indirect(struct virtqueue *vq, int);
|
||||
static void virtqueue_free_indirect(struct virtqueue *vq);
|
||||
static void virtqueue_init_indirect_list(struct virtqueue *,
|
||||
struct vring_desc *);
|
||||
|
||||
static void vq_ring_init(struct virtqueue *);
|
||||
static void vq_ring_update_avail(struct virtqueue *, uint16_t);
|
||||
static uint16_t vq_ring_enqueue_segments(struct virtqueue *,
|
||||
struct vring_desc *, uint16_t, struct sglist *, int, int);
|
||||
static int vq_ring_use_indirect(struct virtqueue *, int);
|
||||
static void vq_ring_enqueue_indirect(struct virtqueue *, void *,
|
||||
struct sglist *, int, int);
|
||||
static void vq_ring_notify_host(struct virtqueue *, int);
|
||||
static void vq_ring_free_chain(struct virtqueue *, uint16_t);
|
||||
|
||||
uint64_t
|
||||
virtqueue_filter_features(uint64_t features)
|
||||
{
|
||||
uint64_t mask;
|
||||
|
||||
mask = (1 << VIRTIO_TRANSPORT_F_START) - 1;
|
||||
mask |= VIRTIO_RING_F_INDIRECT_DESC;
|
||||
|
||||
return (features & mask);
|
||||
}
|
||||
|
||||
int
|
||||
virtqueue_alloc(device_t dev, uint16_t queue, uint16_t size, int align,
|
||||
vm_paddr_t highaddr, struct vq_alloc_info *info, struct virtqueue **vqp)
|
||||
{
|
||||
struct virtqueue *vq;
|
||||
int error;
|
||||
|
||||
*vqp = NULL;
|
||||
error = 0;
|
||||
|
||||
if (size == 0) {
|
||||
device_printf(dev,
|
||||
"virtqueue %d (%s) does not exist (size is zero)\n",
|
||||
queue, info->vqai_name);
|
||||
return (ENODEV);
|
||||
} else if (!powerof2(size)) {
|
||||
device_printf(dev,
|
||||
"virtqueue %d (%s) size is not a power of 2: %d\n",
|
||||
queue, info->vqai_name, size);
|
||||
return (ENXIO);
|
||||
} else if (info->vqai_maxindirsz > VIRTIO_MAX_INDIRECT) {
|
||||
device_printf(dev, "virtqueue %d (%s) requested too many "
|
||||
"indirect descriptors: %d, max %d\n",
|
||||
queue, info->vqai_name, info->vqai_maxindirsz,
|
||||
VIRTIO_MAX_INDIRECT);
|
||||
return (EINVAL);
|
||||
}
|
||||
|
||||
vq = malloc(sizeof(struct virtqueue) +
|
||||
size * sizeof(struct vq_desc_extra), M_DEVBUF, M_NOWAIT | M_ZERO);
|
||||
if (vq == NULL) {
|
||||
device_printf(dev, "cannot allocate virtqueue\n");
|
||||
return (ENOMEM);
|
||||
}
|
||||
|
||||
vq->vq_dev = dev;
|
||||
strlcpy(vq->vq_name, info->vqai_name, sizeof(vq->vq_name));
|
||||
vq->vq_queue_index = queue;
|
||||
vq->vq_alignment = align;
|
||||
vq->vq_nentries = size;
|
||||
vq->vq_free_cnt = size;
|
||||
vq->vq_intrhand = info->vqai_intr;
|
||||
vq->vq_intrhand_arg = info->vqai_intr_arg;
|
||||
|
||||
if (info->vqai_maxindirsz > 1) {
|
||||
error = virtqueue_init_indirect(vq, info->vqai_maxindirsz);
|
||||
if (error)
|
||||
goto fail;
|
||||
}
|
||||
|
||||
vq->vq_ring_size = round_page(vring_size(size, align));
|
||||
vq->vq_ring_mem = contigmalloc(vq->vq_ring_size, M_DEVBUF,
|
||||
M_NOWAIT | M_ZERO, 0, highaddr, PAGE_SIZE, 0);
|
||||
if (vq->vq_ring_mem == NULL) {
|
||||
device_printf(dev,
|
||||
"cannot allocate memory for virtqueue ring\n");
|
||||
error = ENOMEM;
|
||||
goto fail;
|
||||
}
|
||||
|
||||
vq_ring_init(vq);
|
||||
virtqueue_disable_intr(vq);
|
||||
|
||||
*vqp = vq;
|
||||
|
||||
fail:
|
||||
if (error)
|
||||
virtqueue_free(vq);
|
||||
|
||||
return (error);
|
||||
}
|
||||
|
||||
static int
|
||||
virtqueue_init_indirect(struct virtqueue *vq, int indirect_size)
|
||||
{
|
||||
device_t dev;
|
||||
struct vq_desc_extra *dxp;
|
||||
int i, size;
|
||||
|
||||
dev = vq->vq_dev;
|
||||
|
||||
if (VIRTIO_BUS_WITH_FEATURE(dev, VIRTIO_RING_F_INDIRECT_DESC) == 0) {
|
||||
/*
|
||||
* Indirect descriptors requested by the driver but not
|
||||
* negotiated. Return zero to keep the initialization
|
||||
* going: we'll run fine without.
|
||||
*/
|
||||
if (bootverbose)
|
||||
device_printf(dev, "virtqueue %d (%s) requested "
|
||||
"indirect descriptors but not negotiated\n",
|
||||
vq->vq_queue_index, vq->vq_name);
|
||||
return (0);
|
||||
}
|
||||
|
||||
size = indirect_size * sizeof(struct vring_desc);
|
||||
vq->vq_max_indirect_size = indirect_size;
|
||||
vq->vq_indirect_mem_size = size;
|
||||
vq->vq_flags |= VIRTQUEUE_FLAG_INDIRECT;
|
||||
|
||||
for (i = 0; i < vq->vq_nentries; i++) {
|
||||
dxp = &vq->vq_descx[i];
|
||||
|
||||
dxp->indirect = malloc(size, M_DEVBUF, M_NOWAIT);
|
||||
if (dxp->indirect == NULL) {
|
||||
device_printf(dev, "cannot allocate indirect list\n");
|
||||
return (ENOMEM);
|
||||
}
|
||||
|
||||
dxp->indirect_paddr = vtophys(dxp->indirect);
|
||||
virtqueue_init_indirect_list(vq, dxp->indirect);
|
||||
}
|
||||
|
||||
return (0);
|
||||
}
|
||||
|
||||
static void
|
||||
virtqueue_free_indirect(struct virtqueue *vq)
|
||||
{
|
||||
struct vq_desc_extra *dxp;
|
||||
int i;
|
||||
|
||||
for (i = 0; i < vq->vq_nentries; i++) {
|
||||
dxp = &vq->vq_descx[i];
|
||||
|
||||
if (dxp->indirect == NULL)
|
||||
break;
|
||||
|
||||
free(dxp->indirect, M_DEVBUF);
|
||||
dxp->indirect = NULL;
|
||||
dxp->indirect_paddr = 0;
|
||||
}
|
||||
|
||||
vq->vq_flags &= ~VIRTQUEUE_FLAG_INDIRECT;
|
||||
vq->vq_indirect_mem_size = 0;
|
||||
}
|
||||
|
||||
static void
|
||||
virtqueue_init_indirect_list(struct virtqueue *vq,
|
||||
struct vring_desc *indirect)
|
||||
{
|
||||
int i;
|
||||
|
||||
bzero(indirect, vq->vq_indirect_mem_size);
|
||||
|
||||
for (i = 0; i < vq->vq_max_indirect_size - 1; i++)
|
||||
indirect[i].next = i + 1;
|
||||
indirect[i].next = VQ_RING_DESC_CHAIN_END;
|
||||
}
|
||||
|
||||
int
|
||||
virtqueue_reinit(struct virtqueue *vq, uint16_t size)
|
||||
{
|
||||
struct vq_desc_extra *dxp;
|
||||
int i;
|
||||
|
||||
if (vq->vq_nentries != size) {
|
||||
device_printf(vq->vq_dev,
|
||||
"%s: '%s' changed size; old=%hu, new=%hu\n",
|
||||
__func__, vq->vq_name, vq->vq_nentries, size);
|
||||
return (EINVAL);
|
||||
}
|
||||
|
||||
/* Warn if the virtqueue was not properly cleaned up. */
|
||||
if (vq->vq_free_cnt != vq->vq_nentries) {
|
||||
device_printf(vq->vq_dev,
|
||||
"%s: warning, '%s' virtqueue not empty, "
|
||||
"leaking %d entries\n", __func__, vq->vq_name,
|
||||
vq->vq_nentries - vq->vq_free_cnt);
|
||||
}
|
||||
|
||||
vq->vq_desc_head_idx = 0;
|
||||
vq->vq_used_cons_idx = 0;
|
||||
vq->vq_queued_cnt = 0;
|
||||
vq->vq_free_cnt = vq->vq_nentries;
|
||||
|
||||
/* To be safe, reset all our allocated memory. */
|
||||
bzero(vq->vq_ring_mem, vq->vq_ring_size);
|
||||
for (i = 0; i < vq->vq_nentries; i++) {
|
||||
dxp = &vq->vq_descx[i];
|
||||
dxp->cookie = NULL;
|
||||
dxp->ndescs = 0;
|
||||
if (vq->vq_flags & VIRTQUEUE_FLAG_INDIRECT)
|
||||
virtqueue_init_indirect_list(vq, dxp->indirect);
|
||||
}
|
||||
|
||||
vq_ring_init(vq);
|
||||
virtqueue_disable_intr(vq);
|
||||
|
||||
return (0);
|
||||
}
|
||||
|
||||
void
|
||||
virtqueue_free(struct virtqueue *vq)
|
||||
{
|
||||
|
||||
if (vq->vq_free_cnt != vq->vq_nentries) {
|
||||
device_printf(vq->vq_dev, "%s: freeing non-empty virtqueue, "
|
||||
"leaking %d entries\n", vq->vq_name,
|
||||
vq->vq_nentries - vq->vq_free_cnt);
|
||||
}
|
||||
|
||||
if (vq->vq_flags & VIRTQUEUE_FLAG_INDIRECT)
|
||||
virtqueue_free_indirect(vq);
|
||||
|
||||
if (vq->vq_ring_mem != NULL) {
|
||||
contigfree(vq->vq_ring_mem, vq->vq_ring_size, M_DEVBUF);
|
||||
vq->vq_ring_size = 0;
|
||||
vq->vq_ring_mem = NULL;
|
||||
}
|
||||
|
||||
free(vq, M_DEVBUF);
|
||||
}
|
||||
|
||||
vm_paddr_t
|
||||
virtqueue_paddr(struct virtqueue *vq)
|
||||
{
|
||||
|
||||
return (vtophys(vq->vq_ring_mem));
|
||||
}
|
||||
|
||||
int
|
||||
virtqueue_size(struct virtqueue *vq)
|
||||
{
|
||||
|
||||
return (vq->vq_nentries);
|
||||
}
|
||||
|
||||
int
|
||||
virtqueue_empty(struct virtqueue *vq)
|
||||
{
|
||||
|
||||
return (vq->vq_nentries == vq->vq_free_cnt);
|
||||
}
|
||||
|
||||
int
|
||||
virtqueue_full(struct virtqueue *vq)
|
||||
{
|
||||
|
||||
return (vq->vq_free_cnt == 0);
|
||||
}
|
||||
|
||||
void
|
||||
virtqueue_notify(struct virtqueue *vq)
|
||||
{
|
||||
|
||||
vq->vq_queued_cnt = 0;
|
||||
vq_ring_notify_host(vq, 0);
|
||||
}
|
||||
|
||||
int
|
||||
virtqueue_nused(struct virtqueue *vq)
|
||||
{
|
||||
uint16_t used_idx, nused;
|
||||
|
||||
used_idx = vq->vq_ring.used->idx;
|
||||
if (used_idx >= vq->vq_used_cons_idx)
|
||||
nused = used_idx - vq->vq_used_cons_idx;
|
||||
else
|
||||
nused = UINT16_MAX - vq->vq_used_cons_idx +
|
||||
used_idx + 1;
|
||||
VQASSERT(vq, nused <= vq->vq_nentries, "used more than available");
|
||||
|
||||
return (nused);
|
||||
}
|
||||
|
||||
int
|
||||
virtqueue_intr(struct virtqueue *vq)
|
||||
{
|
||||
|
||||
if (vq->vq_intrhand == NULL ||
|
||||
vq->vq_used_cons_idx == vq->vq_ring.used->idx)
|
||||
return (0);
|
||||
|
||||
vq->vq_intrhand(vq->vq_intrhand_arg);
|
||||
|
||||
return (1);
|
||||
}
|
||||
|
||||
int
|
||||
virtqueue_enable_intr(struct virtqueue *vq)
|
||||
{
|
||||
|
||||
/*
|
||||
* Enable interrupts, making sure we get the latest
|
||||
* index of what's already been consumed.
|
||||
*/
|
||||
vq->vq_ring.avail->flags &= ~VRING_AVAIL_F_NO_INTERRUPT;
|
||||
|
||||
mb();
|
||||
|
||||
/*
|
||||
* Additional items may have been consumed in the time between
|
||||
* since we last checked and enabled interrupts above. Let our
|
||||
* caller know so it processes the new entries.
|
||||
*/
|
||||
if (vq->vq_used_cons_idx != vq->vq_ring.used->idx)
|
||||
return (1);
|
||||
|
||||
return (0);
|
||||
}
|
||||
|
||||
void
|
||||
virtqueue_disable_intr(struct virtqueue *vq)
|
||||
{
|
||||
|
||||
/*
|
||||
* Note this is only considered a hint to the host.
|
||||
*/
|
||||
vq->vq_ring.avail->flags |= VRING_AVAIL_F_NO_INTERRUPT;
|
||||
}
|
||||
|
||||
int
|
||||
virtqueue_enqueue(struct virtqueue *vq, void *cookie, struct sglist *sg,
|
||||
int readable, int writable)
|
||||
{
|
||||
struct vq_desc_extra *dxp;
|
||||
int needed;
|
||||
uint16_t head_idx, idx;
|
||||
|
||||
needed = readable + writable;
|
||||
|
||||
VQASSERT(vq, cookie != NULL, "enqueuing with no cookie");
|
||||
VQASSERT(vq, needed == sg->sg_nseg,
|
||||
"segment count mismatch, %d, %d", needed, sg->sg_nseg);
|
||||
VQASSERT(vq,
|
||||
needed <= vq->vq_nentries || needed <= vq->vq_max_indirect_size,
|
||||
"too many segments to enqueue: %d, %d/%d", needed,
|
||||
vq->vq_nentries, vq->vq_max_indirect_size);
|
||||
|
||||
if (needed < 1)
|
||||
return (EINVAL);
|
||||
if (vq->vq_free_cnt == 0)
|
||||
return (ENOSPC);
|
||||
|
||||
if (vq_ring_use_indirect(vq, needed)) {
|
||||
vq_ring_enqueue_indirect(vq, cookie, sg, readable, writable);
|
||||
return (0);
|
||||
} else if (vq->vq_free_cnt < needed)
|
||||
return (EMSGSIZE);
|
||||
|
||||
head_idx = vq->vq_desc_head_idx;
|
||||
VQ_RING_ASSERT_VALID_IDX(vq, head_idx);
|
||||
dxp = &vq->vq_descx[head_idx];
|
||||
|
||||
VQASSERT(vq, dxp->cookie == NULL,
|
||||
"cookie already exists for index %d", head_idx);
|
||||
dxp->cookie = cookie;
|
||||
dxp->ndescs = needed;
|
||||
|
||||
idx = vq_ring_enqueue_segments(vq, vq->vq_ring.desc, head_idx,
|
||||
sg, readable, writable);
|
||||
|
||||
vq->vq_desc_head_idx = idx;
|
||||
vq->vq_free_cnt -= needed;
|
||||
if (vq->vq_free_cnt == 0)
|
||||
VQ_RING_ASSERT_CHAIN_TERM(vq);
|
||||
else
|
||||
VQ_RING_ASSERT_VALID_IDX(vq, idx);
|
||||
|
||||
vq_ring_update_avail(vq, head_idx);
|
||||
|
||||
return (0);
|
||||
}
|
||||
|
||||
void *
|
||||
virtqueue_dequeue(struct virtqueue *vq, uint32_t *len)
|
||||
{
|
||||
struct vring_used_elem *uep;
|
||||
void *cookie;
|
||||
uint16_t used_idx, desc_idx;
|
||||
|
||||
if (vq->vq_used_cons_idx == vq->vq_ring.used->idx)
|
||||
return (NULL);
|
||||
|
||||
used_idx = vq->vq_used_cons_idx++ & (vq->vq_nentries - 1);
|
||||
uep = &vq->vq_ring.used->ring[used_idx];
|
||||
|
||||
mb();
|
||||
desc_idx = (uint16_t) uep->id;
|
||||
if (len != NULL)
|
||||
*len = uep->len;
|
||||
|
||||
vq_ring_free_chain(vq, desc_idx);
|
||||
|
||||
cookie = vq->vq_descx[desc_idx].cookie;
|
||||
VQASSERT(vq, cookie != NULL, "no cookie for index %d", desc_idx);
|
||||
vq->vq_descx[desc_idx].cookie = NULL;
|
||||
|
||||
return (cookie);
|
||||
}
|
||||
|
||||
void *
|
||||
virtqueue_poll(struct virtqueue *vq, uint32_t *len)
|
||||
{
|
||||
void *cookie;
|
||||
|
||||
while ((cookie = virtqueue_dequeue(vq, len)) == NULL)
|
||||
cpu_spinwait();
|
||||
|
||||
return (cookie);
|
||||
}
|
||||
|
||||
void *
|
||||
virtqueue_drain(struct virtqueue *vq, int *last)
|
||||
{
|
||||
void *cookie;
|
||||
int idx;
|
||||
|
||||
cookie = NULL;
|
||||
idx = *last;
|
||||
|
||||
while (idx < vq->vq_nentries && cookie == NULL) {
|
||||
if ((cookie = vq->vq_descx[idx].cookie) != NULL) {
|
||||
vq->vq_descx[idx].cookie = NULL;
|
||||
/* Free chain to keep free count consistent. */
|
||||
vq_ring_free_chain(vq, idx);
|
||||
}
|
||||
idx++;
|
||||
}
|
||||
|
||||
*last = idx;
|
||||
|
||||
return (cookie);
|
||||
}
|
||||
|
||||
void
|
||||
virtqueue_dump(struct virtqueue *vq)
|
||||
{
|
||||
|
||||
if (vq == NULL)
|
||||
return;
|
||||
|
||||
printf("VQ: %s - size=%d; free=%d; used=%d; queued=%d; "
|
||||
"desc_head_idx=%d; avail.idx=%d; used_cons_idx=%d; "
|
||||
"used.idx=%d; avail.flags=0x%x; used.flags=0x%x\n",
|
||||
vq->vq_name, vq->vq_nentries, vq->vq_free_cnt,
|
||||
virtqueue_nused(vq), vq->vq_queued_cnt, vq->vq_desc_head_idx,
|
||||
vq->vq_ring.avail->idx, vq->vq_used_cons_idx,
|
||||
vq->vq_ring.used->idx, vq->vq_ring.avail->flags,
|
||||
vq->vq_ring.used->flags);
|
||||
}
|
||||
|
||||
static void
|
||||
vq_ring_init(struct virtqueue *vq)
|
||||
{
|
||||
struct vring *vr;
|
||||
char *ring_mem;
|
||||
int i, size;
|
||||
|
||||
ring_mem = vq->vq_ring_mem;
|
||||
size = vq->vq_nentries;
|
||||
vr = &vq->vq_ring;
|
||||
|
||||
vring_init(vr, size, ring_mem, vq->vq_alignment);
|
||||
|
||||
for (i = 0; i < size - 1; i++)
|
||||
vr->desc[i].next = i + 1;
|
||||
vr->desc[i].next = VQ_RING_DESC_CHAIN_END;
|
||||
}
|
||||
|
||||
static void
|
||||
vq_ring_update_avail(struct virtqueue *vq, uint16_t desc_idx)
|
||||
{
|
||||
uint16_t avail_idx;
|
||||
|
||||
/*
|
||||
* Place the head of the descriptor chain into the next slot and make
|
||||
* it usable to the host. The chain is made available now rather than
|
||||
* deferring to virtqueue_notify() in the hopes that if the host is
|
||||
* currently running on another CPU, we can keep it processing the new
|
||||
* descriptor.
|
||||
*/
|
||||
avail_idx = vq->vq_ring.avail->idx & (vq->vq_nentries - 1);
|
||||
vq->vq_ring.avail->ring[avail_idx] = desc_idx;
|
||||
|
||||
mb();
|
||||
vq->vq_ring.avail->idx++;
|
||||
|
||||
/* Keep pending count until virtqueue_notify() for debugging. */
|
||||
vq->vq_queued_cnt++;
|
||||
}
|
||||
|
||||
static uint16_t
|
||||
vq_ring_enqueue_segments(struct virtqueue *vq, struct vring_desc *desc,
|
||||
uint16_t head_idx, struct sglist *sg, int readable, int writable)
|
||||
{
|
||||
struct sglist_seg *seg;
|
||||
struct vring_desc *dp;
|
||||
int i, needed;
|
||||
uint16_t idx;
|
||||
|
||||
needed = readable + writable;
|
||||
|
||||
for (i = 0, idx = head_idx, seg = sg->sg_segs;
|
||||
i < needed;
|
||||
i++, idx = dp->next, seg++) {
|
||||
VQASSERT(vq, idx != VQ_RING_DESC_CHAIN_END,
|
||||
"premature end of free desc chain");
|
||||
|
||||
dp = &desc[idx];
|
||||
dp->addr = seg->ss_paddr;
|
||||
dp->len = seg->ss_len;
|
||||
dp->flags = 0;
|
||||
|
||||
if (i < needed - 1)
|
||||
dp->flags |= VRING_DESC_F_NEXT;
|
||||
if (i >= readable)
|
||||
dp->flags |= VRING_DESC_F_WRITE;
|
||||
}
|
||||
|
||||
return (idx);
|
||||
}
|
||||
|
||||
static int
|
||||
vq_ring_use_indirect(struct virtqueue *vq, int needed)
|
||||
{
|
||||
|
||||
if ((vq->vq_flags & VIRTQUEUE_FLAG_INDIRECT) == 0)
|
||||
return (0);
|
||||
|
||||
if (vq->vq_max_indirect_size < needed)
|
||||
return (0);
|
||||
|
||||
if (needed < 2)
|
||||
return (0);
|
||||
|
||||
return (1);
|
||||
}
|
||||
|
||||
static void
|
||||
vq_ring_enqueue_indirect(struct virtqueue *vq, void *cookie,
|
||||
struct sglist *sg, int readable, int writable)
|
||||
{
|
||||
struct vring_desc *dp;
|
||||
struct vq_desc_extra *dxp;
|
||||
int needed;
|
||||
uint16_t head_idx;
|
||||
|
||||
needed = readable + writable;
|
||||
VQASSERT(vq, needed <= vq->vq_max_indirect_size,
|
||||
"enqueuing too many indirect descriptors");
|
||||
|
||||
head_idx = vq->vq_desc_head_idx;
|
||||
VQ_RING_ASSERT_VALID_IDX(vq, head_idx);
|
||||
dp = &vq->vq_ring.desc[head_idx];
|
||||
dxp = &vq->vq_descx[head_idx];
|
||||
|
||||
VQASSERT(vq, dxp->cookie == NULL,
|
||||
"cookie already exists for index %d", head_idx);
|
||||
dxp->cookie = cookie;
|
||||
dxp->ndescs = 1;
|
||||
|
||||
dp->addr = dxp->indirect_paddr;
|
||||
dp->len = needed * sizeof(struct vring_desc);
|
||||
dp->flags = VRING_DESC_F_INDIRECT;
|
||||
|
||||
vq_ring_enqueue_segments(vq, dxp->indirect, 0,
|
||||
sg, readable, writable);
|
||||
|
||||
vq->vq_desc_head_idx = dp->next;
|
||||
vq->vq_free_cnt--;
|
||||
if (vq->vq_free_cnt == 0)
|
||||
VQ_RING_ASSERT_CHAIN_TERM(vq);
|
||||
else
|
||||
VQ_RING_ASSERT_VALID_IDX(vq, vq->vq_desc_head_idx);
|
||||
|
||||
vq_ring_update_avail(vq, head_idx);
|
||||
}
|
||||
|
||||
static void
|
||||
vq_ring_notify_host(struct virtqueue *vq, int force)
|
||||
{
|
||||
|
||||
mb();
|
||||
|
||||
if (force ||
|
||||
(vq->vq_ring.used->flags & VRING_USED_F_NO_NOTIFY) == 0)
|
||||
VIRTIO_BUS_NOTIFY_VQ(vq->vq_dev, vq->vq_queue_index);
|
||||
}
|
||||
|
||||
static void
|
||||
vq_ring_free_chain(struct virtqueue *vq, uint16_t desc_idx)
|
||||
{
|
||||
struct vring_desc *dp;
|
||||
struct vq_desc_extra *dxp;
|
||||
|
||||
VQ_RING_ASSERT_VALID_IDX(vq, desc_idx);
|
||||
dp = &vq->vq_ring.desc[desc_idx];
|
||||
dxp = &vq->vq_descx[desc_idx];
|
||||
|
||||
if (vq->vq_free_cnt == 0)
|
||||
VQ_RING_ASSERT_CHAIN_TERM(vq);
|
||||
|
||||
vq->vq_free_cnt += dxp->ndescs;
|
||||
dxp->ndescs--;
|
||||
|
||||
if ((dp->flags & VRING_DESC_F_INDIRECT) == 0) {
|
||||
while (dp->flags & VRING_DESC_F_NEXT) {
|
||||
VQ_RING_ASSERT_VALID_IDX(vq, dp->next);
|
||||
dp = &vq->vq_ring.desc[dp->next];
|
||||
dxp->ndescs--;
|
||||
}
|
||||
}
|
||||
VQASSERT(vq, dxp->ndescs == 0, "failed to free entire desc chain");
|
||||
|
||||
/*
|
||||
* We must append the existing free chain, if any, to the end of
|
||||
* newly freed chain. If the virtqueue was completely used, then
|
||||
* head would be VQ_RING_DESC_CHAIN_END (ASSERTed above).
|
||||
*/
|
||||
dp->next = vq->vq_desc_head_idx;
|
||||
vq->vq_desc_head_idx = desc_idx;
|
||||
}
|
98
sys/dev/virtio/virtqueue.h
Normal file
98
sys/dev/virtio/virtqueue.h
Normal file
@ -0,0 +1,98 @@
|
||||
/*-
|
||||
* Copyright (c) 2011, Bryan Venteicher <bryanv@daemoninthecloset.org>
|
||||
* All rights reserved.
|
||||
*
|
||||
* Redistribution and use in source and binary forms, with or without
|
||||
* modification, are permitted provided that the following conditions
|
||||
* are met:
|
||||
* 1. Redistributions of source code must retain the above copyright
|
||||
* notice unmodified, this list of conditions, and the following
|
||||
* disclaimer.
|
||||
* 2. Redistributions in binary form must reproduce the above copyright
|
||||
* notice, this list of conditions and the following disclaimer in the
|
||||
* documentation and/or other materials provided with the distribution.
|
||||
*
|
||||
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
|
||||
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
|
||||
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
|
||||
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
|
||||
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
|
||||
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
||||
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
||||
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
||||
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
|
||||
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
||||
*
|
||||
* $FreeBSD$
|
||||
*/
|
||||
|
||||
#ifndef _VIRTIO_VIRTQUEUE_H
|
||||
#define _VIRTIO_VIRTQUEUE_H
|
||||
|
||||
#include <sys/types.h>
|
||||
|
||||
struct virtqueue;
|
||||
struct sglist;
|
||||
|
||||
/* Support for indirect buffer descriptors. */
|
||||
#define VIRTIO_RING_F_INDIRECT_DESC (1 << 28)
|
||||
|
||||
/* The guest publishes the used index for which it expects an interrupt
|
||||
* at the end of the avail ring. Host should ignore the avail->flags field.
|
||||
* The host publishes the avail index for which it expects a kick
|
||||
* at the end of the used ring. Guest should ignore the used->flags field.
|
||||
*/
|
||||
#define VIRTIO_RING_F_EVENT_IDX (1 << 29)
|
||||
|
||||
/* Device callback for a virtqueue interrupt. */
|
||||
typedef int virtqueue_intr_t(void *);
|
||||
|
||||
#define VIRTQUEUE_MAX_NAME_SZ 32
|
||||
|
||||
/* One for each virtqueue the device wishes to allocate. */
|
||||
struct vq_alloc_info {
|
||||
char vqai_name[VIRTQUEUE_MAX_NAME_SZ];
|
||||
int vqai_maxindirsz;
|
||||
virtqueue_intr_t *vqai_intr;
|
||||
void *vqai_intr_arg;
|
||||
struct virtqueue **vqai_vq;
|
||||
};
|
||||
|
||||
#define VQ_ALLOC_INFO_INIT(_i,_nsegs,_intr,_arg,_vqp,_str,...) do { \
|
||||
snprintf((_i)->vqai_name, VIRTQUEUE_MAX_NAME_SZ, _str, \
|
||||
##__VA_ARGS__); \
|
||||
(_i)->vqai_maxindirsz = (_nsegs); \
|
||||
(_i)->vqai_intr = (_intr); \
|
||||
(_i)->vqai_intr_arg = (_arg); \
|
||||
(_i)->vqai_vq = (_vqp); \
|
||||
} while (0)
|
||||
|
||||
uint64_t virtqueue_filter_features(uint64_t features);
|
||||
|
||||
int virtqueue_alloc(device_t dev, uint16_t queue, uint16_t size,
|
||||
int align, vm_paddr_t highaddr, struct vq_alloc_info *info,
|
||||
struct virtqueue **vqp);
|
||||
void *virtqueue_drain(struct virtqueue *vq, int *last);
|
||||
void virtqueue_free(struct virtqueue *vq);
|
||||
int virtqueue_reinit(struct virtqueue *vq, uint16_t size);
|
||||
|
||||
int virtqueue_intr(struct virtqueue *vq);
|
||||
int virtqueue_enable_intr(struct virtqueue *vq);
|
||||
void virtqueue_disable_intr(struct virtqueue *vq);
|
||||
|
||||
/* Get physical address of the virtqueue ring. */
|
||||
vm_paddr_t virtqueue_paddr(struct virtqueue *vq);
|
||||
|
||||
int virtqueue_full(struct virtqueue *vq);
|
||||
int virtqueue_empty(struct virtqueue *vq);
|
||||
int virtqueue_size(struct virtqueue *vq);
|
||||
int virtqueue_nused(struct virtqueue *vq);
|
||||
void virtqueue_notify(struct virtqueue *vq);
|
||||
void virtqueue_dump(struct virtqueue *vq);
|
||||
|
||||
int virtqueue_enqueue(struct virtqueue *vq, void *cookie,
|
||||
struct sglist *sg, int readable, int writable);
|
||||
void *virtqueue_dequeue(struct virtqueue *vq, uint32_t *len);
|
||||
void *virtqueue_poll(struct virtqueue *vq, uint32_t *len);
|
||||
|
||||
#endif /* _VIRTIO_VIRTQUEUE_H */
|
@ -317,6 +317,7 @@ SUBDIR= ${_3dfx} \
|
||||
usb \
|
||||
utopia \
|
||||
${_vesa} \
|
||||
${_virtio} \
|
||||
vge \
|
||||
vkbd \
|
||||
${_vpo} \
|
||||
@ -537,6 +538,7 @@ _padlock= padlock
|
||||
_s3= s3
|
||||
_twa= twa
|
||||
_vesa= vesa
|
||||
_virtio= virtio
|
||||
_x86bios= x86bios
|
||||
.elif ${MACHINE} == "pc98"
|
||||
_canbepm= canbepm
|
||||
@ -636,6 +638,7 @@ _sppp= sppp
|
||||
_tpm= tpm
|
||||
_twa= twa
|
||||
_vesa= vesa
|
||||
_virtio= virtio
|
||||
_vxge= vxge
|
||||
_x86bios= x86bios
|
||||
_wi= wi
|
||||
|
28
sys/modules/virtio/Makefile
Normal file
28
sys/modules/virtio/Makefile
Normal file
@ -0,0 +1,28 @@
|
||||
#
|
||||
# $FreeBSD$
|
||||
#
|
||||
# Redistribution and use in source and binary forms, with or without
|
||||
# modification, are permitted provided that the following conditions
|
||||
# are met:
|
||||
# 1. Redistributions of source code must retain the above copyright
|
||||
# notice, this list of conditions and the following disclaimer.
|
||||
# 2. Redistributions in binary form must reproduce the above copyright
|
||||
# notice, this list of conditions and the following disclaimer in the
|
||||
# documentation and/or other materials provided with the distribution.
|
||||
#
|
||||
# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
|
||||
# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
||||
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
||||
# ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
|
||||
# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
||||
# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
||||
# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
||||
# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
||||
# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
||||
# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
||||
# SUCH DAMAGE.
|
||||
#
|
||||
|
||||
SUBDIR= virtio pci network block balloon
|
||||
|
||||
.include <bsd.subdir.mk>
|
36
sys/modules/virtio/balloon/Makefile
Normal file
36
sys/modules/virtio/balloon/Makefile
Normal file
@ -0,0 +1,36 @@
|
||||
#
|
||||
# $FreeBSD$
|
||||
#
|
||||
# Redistribution and use in source and binary forms, with or without
|
||||
# modification, are permitted provided that the following conditions
|
||||
# are met:
|
||||
# 1. Redistributions of source code must retain the above copyright
|
||||
# notice, this list of conditions and the following disclaimer.
|
||||
# 2. Redistributions in binary form must reproduce the above copyright
|
||||
# notice, this list of conditions and the following disclaimer in the
|
||||
# documentation and/or other materials provided with the distribution.
|
||||
#
|
||||
# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
|
||||
# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
||||
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
||||
# ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
|
||||
# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
||||
# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
||||
# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
||||
# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
||||
# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
||||
# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
||||
# SUCH DAMAGE.
|
||||
#
|
||||
|
||||
.PATH: ${.CURDIR}/../../../dev/virtio/balloon
|
||||
|
||||
KMOD= virtio_balloon
|
||||
SRCS= virtio_balloon.c
|
||||
SRCS+= virtio_bus_if.h virtio_if.h
|
||||
SRCS+= bus_if.h device_if.h
|
||||
|
||||
MFILES= kern/bus_if.m kern/device_if.m \
|
||||
dev/virtio/virtio_bus_if.m dev/virtio/virtio_if.m
|
||||
|
||||
.include <bsd.kmod.mk>
|
36
sys/modules/virtio/block/Makefile
Normal file
36
sys/modules/virtio/block/Makefile
Normal file
@ -0,0 +1,36 @@
|
||||
#
|
||||
# $FreeBSD$
|
||||
#
|
||||
# Redistribution and use in source and binary forms, with or without
|
||||
# modification, are permitted provided that the following conditions
|
||||
# are met:
|
||||
# 1. Redistributions of source code must retain the above copyright
|
||||
# notice, this list of conditions and the following disclaimer.
|
||||
# 2. Redistributions in binary form must reproduce the above copyright
|
||||
# notice, this list of conditions and the following disclaimer in the
|
||||
# documentation and/or other materials provided with the distribution.
|
||||
#
|
||||
# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
|
||||
# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
||||
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
||||
# ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
|
||||
# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
||||
# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
||||
# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
||||
# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
||||
# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
||||
# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
||||
# SUCH DAMAGE.
|
||||
#
|
||||
|
||||
.PATH: ${.CURDIR}/../../../dev/virtio/block
|
||||
|
||||
KMOD= virtio_blk
|
||||
SRCS= virtio_blk.c
|
||||
SRCS+= virtio_bus_if.h virtio_if.h
|
||||
SRCS+= bus_if.h device_if.h
|
||||
|
||||
MFILES= kern/bus_if.m kern/device_if.m \
|
||||
dev/virtio/virtio_bus_if.m dev/virtio/virtio_if.m
|
||||
|
||||
.include <bsd.kmod.mk>
|
36
sys/modules/virtio/network/Makefile
Normal file
36
sys/modules/virtio/network/Makefile
Normal file
@ -0,0 +1,36 @@
|
||||
#
|
||||
# $FreeBSD$
|
||||
#
|
||||
# Redistribution and use in source and binary forms, with or without
|
||||
# modification, are permitted provided that the following conditions
|
||||
# are met:
|
||||
# 1. Redistributions of source code must retain the above copyright
|
||||
# notice, this list of conditions and the following disclaimer.
|
||||
# 2. Redistributions in binary form must reproduce the above copyright
|
||||
# notice, this list of conditions and the following disclaimer in the
|
||||
# documentation and/or other materials provided with the distribution.
|
||||
#
|
||||
# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
|
||||
# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
||||
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
||||
# ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
|
||||
# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
||||
# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
||||
# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
||||
# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
||||
# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
||||
# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
||||
# SUCH DAMAGE.
|
||||
#
|
||||
|
||||
.PATH: ${.CURDIR}/../../../dev/virtio/network
|
||||
|
||||
KMOD= if_vtnet
|
||||
SRCS= if_vtnet.c
|
||||
SRCS+= virtio_bus_if.h virtio_if.h
|
||||
SRCS+= bus_if.h device_if.h
|
||||
|
||||
MFILES= kern/bus_if.m kern/device_if.m \
|
||||
dev/virtio/virtio_bus_if.m dev/virtio/virtio_if.m
|
||||
|
||||
.include <bsd.kmod.mk>
|
36
sys/modules/virtio/pci/Makefile
Normal file
36
sys/modules/virtio/pci/Makefile
Normal file
@ -0,0 +1,36 @@
|
||||
#
|
||||
# $FreeBSD$
|
||||
#
|
||||
# Redistribution and use in source and binary forms, with or without
|
||||
# modification, are permitted provided that the following conditions
|
||||
# are met:
|
||||
# 1. Redistributions of source code must retain the above copyright
|
||||
# notice, this list of conditions and the following disclaimer.
|
||||
# 2. Redistributions in binary form must reproduce the above copyright
|
||||
# notice, this list of conditions and the following disclaimer in the
|
||||
# documentation and/or other materials provided with the distribution.
|
||||
#
|
||||
# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
|
||||
# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
||||
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
||||
# ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
|
||||
# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
||||
# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
||||
# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
||||
# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
||||
# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
||||
# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
||||
# SUCH DAMAGE.
|
||||
#
|
||||
|
||||
.PATH: ${.CURDIR}/../../../dev/virtio/pci
|
||||
|
||||
KMOD= virtio_pci
|
||||
SRCS= virtio_pci.c
|
||||
SRCS+= virtio_bus_if.h virtio_if.h
|
||||
SRCS+= bus_if.h device_if.h pci_if.h
|
||||
|
||||
MFILES= kern/bus_if.m kern/device_if.m dev/pci/pci_if.m \
|
||||
dev/virtio/virtio_bus_if.m dev/virtio/virtio_if.m
|
||||
|
||||
.include <bsd.kmod.mk>
|
38
sys/modules/virtio/virtio/Makefile
Normal file
38
sys/modules/virtio/virtio/Makefile
Normal file
@ -0,0 +1,38 @@
|
||||
#
|
||||
# $FreeBSD$
|
||||
#
|
||||
# Redistribution and use in source and binary forms, with or without
|
||||
# modification, are permitted provided that the following conditions
|
||||
# are met:
|
||||
# 1. Redistributions of source code must retain the above copyright
|
||||
# notice, this list of conditions and the following disclaimer.
|
||||
# 2. Redistributions in binary form must reproduce the above copyright
|
||||
# notice, this list of conditions and the following disclaimer in the
|
||||
# documentation and/or other materials provided with the distribution.
|
||||
#
|
||||
# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
|
||||
# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
||||
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
||||
# ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
|
||||
# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
||||
# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
||||
# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
||||
# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
||||
# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
||||
# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
||||
# SUCH DAMAGE.
|
||||
#
|
||||
|
||||
.PATH: ${.CURDIR}/../../../dev/virtio
|
||||
|
||||
KMOD= virtio
|
||||
|
||||
SRCS= virtio.c virtqueue.c
|
||||
SRCS+= virtio_bus_if.c virtio_bus_if.h
|
||||
SRCS+= virtio_if.c virtio_if.h
|
||||
SRCS+= bus_if.h device_if.h
|
||||
|
||||
MFILES= kern/bus_if.m kern/device_if.m \
|
||||
dev/virtio/virtio_bus_if.m dev/virtio/virtio_if.m
|
||||
|
||||
.include <bsd.kmod.mk>
|
Loading…
Reference in New Issue
Block a user