| #ifndef _UAPI_LINUX_VIRTIO_CONFIG_H |
| #define _UAPI_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 41 |
| |
| #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 platform DMA (e.g. IOMMU) bypass quirk feature. |
| * If set - use platform DMA tools to access the memory. |
| * |
| * Note the reverse polarity (compared to most other features), |
| * this is for compatibility with legacy systems. |
| */ |
| #define VIRTIO_F_ACCESS_PLATFORM 33 |
| #ifndef __KERNEL__ |
| /* Legacy name for VIRTIO_F_ACCESS_PLATFORM (for compatibility with old userspace) */ |
| #define VIRTIO_F_IOMMU_PLATFORM VIRTIO_F_ACCESS_PLATFORM |
| #endif /* __KERNEL__ */ |
| |
| /* This feature indicates support for the packed virtqueue layout. */ |
| #define VIRTIO_F_RING_PACKED 34 |
| |
| /* |
| * Inorder feature indicates that all buffers are used by the device |
| * in the same order in which they have been made available. |
| */ |
| #define VIRTIO_F_IN_ORDER 35 |
| |
| /* |
| * 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 |
| |
| /* |
| * This feature indicates that the driver passes extra data (besides |
| * identifying the virtqueue) in its device notifications. |
| */ |
| #define VIRTIO_F_NOTIFICATION_DATA 38 |
| |
| /* |
| * This feature indicates that the driver can reset a queue individually. |
| */ |
| #define VIRTIO_F_RING_RESET 40 |
| #endif /* _UAPI_LINUX_VIRTIO_CONFIG_H */ |
