45543f0751
These defines are applicable to userland too, but virtqueue.h contains the kernel virtqueue interface, and is therefore not usable in userland. Note that Linux places these defines in virtio_ring.h, but I don't want the drivers including this header file to keep the VirtIO ring opaque to everything but the virtqueue. MFC after: 1 week
68 lines
2.6 KiB
C
68 lines
2.6 KiB
C
/*-
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* This header is BSD licensed so anyone can use the definitions to implement
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* compatible drivers/servers.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of IBM nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL IBM OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#ifndef _VIRTIO_CONFIG_H_
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#define _VIRTIO_CONFIG_H_
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/* Status byte for guest to report progress. */
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#define VIRTIO_CONFIG_STATUS_RESET 0x00
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#define VIRTIO_CONFIG_STATUS_ACK 0x01
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#define VIRTIO_CONFIG_STATUS_DRIVER 0x03
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#define VIRTIO_CONFIG_STATUS_DRIVER_OK 0x04
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#define VIRTIO_CONFIG_STATUS_FAILED 0x80
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/*
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* Generate interrupt when the virtqueue ring is
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* completely used, even if we've suppressed them.
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*/
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#define VIRTIO_F_NOTIFY_ON_EMPTY (1 << 24)
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/* Support for indirect buffer descriptors. */
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#define VIRTIO_RING_F_INDIRECT_DESC (1 << 28)
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/* Support to suppress interrupt until specific index is reached. */
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#define VIRTIO_RING_F_EVENT_IDX (1 << 29)
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/*
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* The guest should never negotiate this feature; it
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* is used to detect faulty drivers.
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*/
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#define VIRTIO_F_BAD_FEATURE (1 << 30)
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/*
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* Some VirtIO feature bits (currently bits 28 through 31) are
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* reserved for the transport being used (eg. virtio_ring), the
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* rest are per-device feature bits.
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*/
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#define VIRTIO_TRANSPORT_F_START 28
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#define VIRTIO_TRANSPORT_F_END 32
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#endif /* _VIRTIO_CONFIG_H_ */
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