1*9fbe302bSMichael S. Tsirkin #ifndef _LINUX_VIRTIO_CONFIG_H 2*9fbe302bSMichael S. Tsirkin #define _LINUX_VIRTIO_CONFIG_H 3*9fbe302bSMichael S. Tsirkin /* This header, excluding the #ifdef __KERNEL__ part, is BSD licensed so 4*9fbe302bSMichael S. Tsirkin * anyone can use the definitions to implement compatible drivers/servers. 5*9fbe302bSMichael S. Tsirkin * 6*9fbe302bSMichael S. Tsirkin * Redistribution and use in source and binary forms, with or without 7*9fbe302bSMichael S. Tsirkin * modification, are permitted provided that the following conditions 8*9fbe302bSMichael S. Tsirkin * are met: 9*9fbe302bSMichael S. Tsirkin * 1. Redistributions of source code must retain the above copyright 10*9fbe302bSMichael S. Tsirkin * notice, this list of conditions and the following disclaimer. 11*9fbe302bSMichael S. Tsirkin * 2. Redistributions in binary form must reproduce the above copyright 12*9fbe302bSMichael S. Tsirkin * notice, this list of conditions and the following disclaimer in the 13*9fbe302bSMichael S. Tsirkin * documentation and/or other materials provided with the distribution. 14*9fbe302bSMichael S. Tsirkin * 3. Neither the name of IBM nor the names of its contributors 15*9fbe302bSMichael S. Tsirkin * may be used to endorse or promote products derived from this software 16*9fbe302bSMichael S. Tsirkin * without specific prior written permission. 17*9fbe302bSMichael S. Tsirkin * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS IS'' AND 18*9fbe302bSMichael S. Tsirkin * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19*9fbe302bSMichael S. Tsirkin * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20*9fbe302bSMichael S. Tsirkin * ARE DISCLAIMED. IN NO EVENT SHALL IBM OR CONTRIBUTORS BE LIABLE 21*9fbe302bSMichael S. Tsirkin * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22*9fbe302bSMichael S. Tsirkin * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23*9fbe302bSMichael S. Tsirkin * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24*9fbe302bSMichael S. Tsirkin * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25*9fbe302bSMichael S. Tsirkin * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26*9fbe302bSMichael S. Tsirkin * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27*9fbe302bSMichael S. Tsirkin * SUCH DAMAGE. */ 28*9fbe302bSMichael S. Tsirkin 29*9fbe302bSMichael S. Tsirkin /* Virtio devices use a standardized configuration space to define their 30*9fbe302bSMichael S. Tsirkin * features and pass configuration information, but each implementation can 31*9fbe302bSMichael S. Tsirkin * store and access that space differently. */ 32*9fbe302bSMichael S. Tsirkin #include "standard-headers/linux/types.h" 33*9fbe302bSMichael S. Tsirkin 34*9fbe302bSMichael S. Tsirkin /* Status byte for guest to report progress, and synchronize features. */ 35*9fbe302bSMichael S. Tsirkin /* We have seen device and processed generic fields (VIRTIO_CONFIG_F_VIRTIO) */ 36*9fbe302bSMichael S. Tsirkin #define VIRTIO_CONFIG_S_ACKNOWLEDGE 1 37*9fbe302bSMichael S. Tsirkin /* We have found a driver for the device. */ 38*9fbe302bSMichael S. Tsirkin #define VIRTIO_CONFIG_S_DRIVER 2 39*9fbe302bSMichael S. Tsirkin /* Driver has used its parts of the config, and is happy */ 40*9fbe302bSMichael S. Tsirkin #define VIRTIO_CONFIG_S_DRIVER_OK 4 41*9fbe302bSMichael S. Tsirkin /* Driver has finished configuring features */ 42*9fbe302bSMichael S. Tsirkin #define VIRTIO_CONFIG_S_FEATURES_OK 8 43*9fbe302bSMichael S. Tsirkin /* We've given up on this device. */ 44*9fbe302bSMichael S. Tsirkin #define VIRTIO_CONFIG_S_FAILED 0x80 45*9fbe302bSMichael S. Tsirkin 46*9fbe302bSMichael S. Tsirkin /* Some virtio feature bits (currently bits 28 through 32) are reserved for the 47*9fbe302bSMichael S. Tsirkin * transport being used (eg. virtio_ring), the rest are per-device feature 48*9fbe302bSMichael S. Tsirkin * bits. */ 49*9fbe302bSMichael S. Tsirkin #define VIRTIO_TRANSPORT_F_START 28 50*9fbe302bSMichael S. Tsirkin #define VIRTIO_TRANSPORT_F_END 33 51*9fbe302bSMichael S. Tsirkin 52*9fbe302bSMichael S. Tsirkin #ifndef VIRTIO_CONFIG_NO_LEGACY 53*9fbe302bSMichael S. Tsirkin /* Do we get callbacks when the ring is completely used, even if we've 54*9fbe302bSMichael S. Tsirkin * suppressed them? */ 55*9fbe302bSMichael S. Tsirkin #define VIRTIO_F_NOTIFY_ON_EMPTY 24 56*9fbe302bSMichael S. Tsirkin 57*9fbe302bSMichael S. Tsirkin /* Can the device handle any descriptor layout? */ 58*9fbe302bSMichael S. Tsirkin #define VIRTIO_F_ANY_LAYOUT 27 59*9fbe302bSMichael S. Tsirkin #endif /* VIRTIO_CONFIG_NO_LEGACY */ 60*9fbe302bSMichael S. Tsirkin 61*9fbe302bSMichael S. Tsirkin /* v1.0 compliant. */ 62*9fbe302bSMichael S. Tsirkin #define VIRTIO_F_VERSION_1 32 63*9fbe302bSMichael S. Tsirkin 64*9fbe302bSMichael S. Tsirkin #endif /* _LINUX_VIRTIO_CONFIG_H */ 65