1*607ca46eSDavid Howells #ifndef _UAPI_LINUX_VIRTIO_CONFIG_H 2*607ca46eSDavid Howells #define _UAPI_LINUX_VIRTIO_CONFIG_H 3*607ca46eSDavid Howells /* This header, excluding the #ifdef __KERNEL__ part, is BSD licensed so 4*607ca46eSDavid Howells * anyone can use the definitions to implement compatible drivers/servers. 5*607ca46eSDavid Howells * 6*607ca46eSDavid Howells * Redistribution and use in source and binary forms, with or without 7*607ca46eSDavid Howells * modification, are permitted provided that the following conditions 8*607ca46eSDavid Howells * are met: 9*607ca46eSDavid Howells * 1. Redistributions of source code must retain the above copyright 10*607ca46eSDavid Howells * notice, this list of conditions and the following disclaimer. 11*607ca46eSDavid Howells * 2. Redistributions in binary form must reproduce the above copyright 12*607ca46eSDavid Howells * notice, this list of conditions and the following disclaimer in the 13*607ca46eSDavid Howells * documentation and/or other materials provided with the distribution. 14*607ca46eSDavid Howells * 3. Neither the name of IBM nor the names of its contributors 15*607ca46eSDavid Howells * may be used to endorse or promote products derived from this software 16*607ca46eSDavid Howells * without specific prior written permission. 17*607ca46eSDavid Howells * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS IS'' AND 18*607ca46eSDavid Howells * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19*607ca46eSDavid Howells * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20*607ca46eSDavid Howells * ARE DISCLAIMED. IN NO EVENT SHALL IBM OR CONTRIBUTORS BE LIABLE 21*607ca46eSDavid Howells * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22*607ca46eSDavid Howells * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23*607ca46eSDavid Howells * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24*607ca46eSDavid Howells * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25*607ca46eSDavid Howells * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26*607ca46eSDavid Howells * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27*607ca46eSDavid Howells * SUCH DAMAGE. */ 28*607ca46eSDavid Howells 29*607ca46eSDavid Howells /* Virtio devices use a standardized configuration space to define their 30*607ca46eSDavid Howells * features and pass configuration information, but each implementation can 31*607ca46eSDavid Howells * store and access that space differently. */ 32*607ca46eSDavid Howells #include <linux/types.h> 33*607ca46eSDavid Howells 34*607ca46eSDavid Howells /* Status byte for guest to report progress, and synchronize features. */ 35*607ca46eSDavid Howells /* We have seen device and processed generic fields (VIRTIO_CONFIG_F_VIRTIO) */ 36*607ca46eSDavid Howells #define VIRTIO_CONFIG_S_ACKNOWLEDGE 1 37*607ca46eSDavid Howells /* We have found a driver for the device. */ 38*607ca46eSDavid Howells #define VIRTIO_CONFIG_S_DRIVER 2 39*607ca46eSDavid Howells /* Driver has used its parts of the config, and is happy */ 40*607ca46eSDavid Howells #define VIRTIO_CONFIG_S_DRIVER_OK 4 41*607ca46eSDavid Howells /* We've given up on this device. */ 42*607ca46eSDavid Howells #define VIRTIO_CONFIG_S_FAILED 0x80 43*607ca46eSDavid Howells 44*607ca46eSDavid Howells /* Some virtio feature bits (currently bits 28 through 31) are reserved for the 45*607ca46eSDavid Howells * transport being used (eg. virtio_ring), the rest are per-device feature 46*607ca46eSDavid Howells * bits. */ 47*607ca46eSDavid Howells #define VIRTIO_TRANSPORT_F_START 28 48*607ca46eSDavid Howells #define VIRTIO_TRANSPORT_F_END 32 49*607ca46eSDavid Howells 50*607ca46eSDavid Howells /* Do we get callbacks when the ring is completely used, even if we've 51*607ca46eSDavid Howells * suppressed them? */ 52*607ca46eSDavid Howells #define VIRTIO_F_NOTIFY_ON_EMPTY 24 53*607ca46eSDavid Howells 54*607ca46eSDavid Howells #endif /* _UAPI_LINUX_VIRTIO_CONFIG_H */ 55