You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
92 lines
3.7 KiB
C
92 lines
3.7 KiB
C
4 years ago
|
#ifndef _LINUX_VIRTIO_CONFIG_H
|
||
|
|
#define _LINUX_VIRTIO_CONFIG_H
|
||
|
|
/* This header, excluding the #ifdef __KERNEL__ part, is BSD licensed so
|
||
|
|
* anyone can use the definitions to implement compatible drivers/servers.
|
||
|
|
*
|
||
|
|
* 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.
|
||
|
|
* 3. Neither the name of IBM nor the names of its contributors
|
||
|
|
* may be used to endorse or promote products derived from this software
|
||
|
|
* without specific prior written permission.
|
||
|
|
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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 IBM 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. */
|
||
|
|
|
||
|
|
/* Virtio devices use a standardized configuration space to define their
|
||
|
|
* features and pass configuration information, but each implementation can
|
||
|
|
* store and access that space differently. */
|
||
|
|
#include <linux/types.h>
|
||
|
|
|
||
|
|
/* Status byte for guest to report progress, and synchronize features. */
|
||
|
|
/* We have seen device and processed generic fields (VIRTIO_CONFIG_F_VIRTIO) */
|
||
|
|
#define VIRTIO_CONFIG_S_ACKNOWLEDGE 1
|
||
|
|
/* We have found a driver for the device. */
|
||
|
|
#define VIRTIO_CONFIG_S_DRIVER 2
|
||
|
|
/* Driver has used its parts of the config, and is happy */
|
||
|
|
#define VIRTIO_CONFIG_S_DRIVER_OK 4
|
||
|
|
/* Driver has finished configuring features */
|
||
|
|
#define VIRTIO_CONFIG_S_FEATURES_OK 8
|
||
|
|
/* Device entered invalid state, driver must reset it */
|
||
|
|
#define VIRTIO_CONFIG_S_NEEDS_RESET 0x40
|
||
|
|
/* We've given up on this device. */
|
||
|
|
#define VIRTIO_CONFIG_S_FAILED 0x80
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Virtio feature bits VIRTIO_TRANSPORT_F_START through
|
||
|
|
* VIRTIO_TRANSPORT_F_END are reserved for the transport
|
||
|
|
* being used (e.g. virtio_ring, virtio_pci etc.), the
|
||
|
|
* rest are per-device feature bits.
|
||
|
|
*/
|
||
|
|
#define VIRTIO_TRANSPORT_F_START 28
|
||
|
|
#define VIRTIO_TRANSPORT_F_END 38
|
||
|
|
|
||
|
|
#ifndef VIRTIO_CONFIG_NO_LEGACY
|
||
|
|
/* Do we get callbacks when the ring is completely used, even if we've
|
||
|
|
* suppressed them? */
|
||
|
|
#define VIRTIO_F_NOTIFY_ON_EMPTY 24
|
||
|
|
|
||
|
|
/* Can the device handle any descriptor layout? */
|
||
|
|
#define VIRTIO_F_ANY_LAYOUT 27
|
||
|
|
#endif /* VIRTIO_CONFIG_NO_LEGACY */
|
||
|
|
|
||
|
|
/* v1.0 compliant. */
|
||
|
|
#define VIRTIO_F_VERSION_1 32
|
||
|
|
|
||
|
|
/*
|
||
|
|
* If clear - device has the IOMMU bypass quirk feature.
|
||
|
|
* If set - use platform tools to detect the IOMMU.
|
||
|
|
*
|
||
|
|
* Note the reverse polarity (compared to most other features),
|
||
|
|
* this is for compatibility with legacy systems.
|
||
|
|
*/
|
||
|
|
#define VIRTIO_F_IOMMU_PLATFORM 33
|
||
|
|
|
||
|
|
/* This feature indicates support for the packed virtqueue layout. */
|
||
|
|
#define VIRTIO_F_RING_PACKED 34
|
||
|
|
|
||
|
|
/*
|
||
|
|
* This feature indicates that memory accesses by the driver and the
|
||
|
|
* device are ordered in a way described by the platform.
|
||
|
|
*/
|
||
|
|
#define VIRTIO_F_ORDER_PLATFORM 36
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Does the device support Single Root I/O Virtualization?
|
||
|
|
*/
|
||
|
|
#define VIRTIO_F_SR_IOV 37
|
||
|
|
#endif /* _LINUX_VIRTIO_CONFIG_H */
|