/*- * This header 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. * * $FreeBSD$ */ #ifndef _VIRTIO_CONFIG_H_ #define _VIRTIO_CONFIG_H_ /* Status byte for guest to report progress. */ #define VIRTIO_CONFIG_STATUS_RESET 0x00 /* We have seen device and processed generic fields. */ #define VIRTIO_CONFIG_STATUS_ACK 0x01 /* We have found a driver for the device. */ #define VIRTIO_CONFIG_STATUS_DRIVER 0x02 /* Driver has used its parts of the config, and is happy. */ #define VIRTIO_CONFIG_STATUS_DRIVER_OK 0x04 /* Driver has finished configuring features (modern only). */ #define VIRTIO_CONFIG_S_FEATURES_OK 0x08 /* 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_STATUS_FAILED 0x80 /* * Generate interrupt when the virtqueue ring is * completely used, even if we've suppressed them. */ #define VIRTIO_F_NOTIFY_ON_EMPTY (1UL << 24) /* Can the device handle any descriptor layout? */ #define VIRTIO_F_ANY_LAYOUT (1UL << 27) /* Support for indirect buffer descriptors. */ #define VIRTIO_RING_F_INDIRECT_DESC (1UL << 28) /* Support to suppress interrupt until specific index is reached. */ #define VIRTIO_RING_F_EVENT_IDX (1UL << 29) /* * The guest should never negotiate this feature; it * is used to detect faulty drivers. */ #define VIRTIO_F_BAD_FEATURE (1UL << 30) /* v1.0 compliant. */ #define VIRTIO_F_VERSION_1 (1ULL << 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 (1ULL << 33) /* * Some VirtIO feature bits (currently bits 28 through 34) 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 34 #endif /* _VIRTIO_CONFIG_H_ */ |