1*4882a593Smuzhiyun #ifndef _UAPI_LINUX_VIRTIO_CONFIG_H 2*4882a593Smuzhiyun #define _UAPI_LINUX_VIRTIO_CONFIG_H 3*4882a593Smuzhiyun /* This header, excluding the #ifdef __KERNEL__ part, is BSD licensed so 4*4882a593Smuzhiyun * anyone can use the definitions to implement compatible drivers/servers. 5*4882a593Smuzhiyun * 6*4882a593Smuzhiyun * Redistribution and use in source and binary forms, with or without 7*4882a593Smuzhiyun * modification, are permitted provided that the following conditions 8*4882a593Smuzhiyun * are met: 9*4882a593Smuzhiyun * 1. Redistributions of source code must retain the above copyright 10*4882a593Smuzhiyun * notice, this list of conditions and the following disclaimer. 11*4882a593Smuzhiyun * 2. Redistributions in binary form must reproduce the above copyright 12*4882a593Smuzhiyun * notice, this list of conditions and the following disclaimer in the 13*4882a593Smuzhiyun * documentation and/or other materials provided with the distribution. 14*4882a593Smuzhiyun * 3. Neither the name of IBM nor the names of its contributors 15*4882a593Smuzhiyun * may be used to endorse or promote products derived from this software 16*4882a593Smuzhiyun * without specific prior written permission. 17*4882a593Smuzhiyun * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS IS'' AND 18*4882a593Smuzhiyun * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19*4882a593Smuzhiyun * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20*4882a593Smuzhiyun * ARE DISCLAIMED. IN NO EVENT SHALL IBM OR CONTRIBUTORS BE LIABLE 21*4882a593Smuzhiyun * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22*4882a593Smuzhiyun * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23*4882a593Smuzhiyun * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24*4882a593Smuzhiyun * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25*4882a593Smuzhiyun * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26*4882a593Smuzhiyun * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27*4882a593Smuzhiyun * SUCH DAMAGE. */ 28*4882a593Smuzhiyun 29*4882a593Smuzhiyun /* Virtio devices use a standardized configuration space to define their 30*4882a593Smuzhiyun * features and pass configuration information, but each implementation can 31*4882a593Smuzhiyun * store and access that space differently. */ 32*4882a593Smuzhiyun #include <linux/types.h> 33*4882a593Smuzhiyun 34*4882a593Smuzhiyun /* Status byte for guest to report progress, and synchronize features. */ 35*4882a593Smuzhiyun /* We have seen device and processed generic fields (VIRTIO_CONFIG_F_VIRTIO) */ 36*4882a593Smuzhiyun #define VIRTIO_CONFIG_S_ACKNOWLEDGE 1 37*4882a593Smuzhiyun /* We have found a driver for the device. */ 38*4882a593Smuzhiyun #define VIRTIO_CONFIG_S_DRIVER 2 39*4882a593Smuzhiyun /* Driver has used its parts of the config, and is happy */ 40*4882a593Smuzhiyun #define VIRTIO_CONFIG_S_DRIVER_OK 4 41*4882a593Smuzhiyun /* Driver has finished configuring features */ 42*4882a593Smuzhiyun #define VIRTIO_CONFIG_S_FEATURES_OK 8 43*4882a593Smuzhiyun /* Device entered invalid state, driver must reset it */ 44*4882a593Smuzhiyun #define VIRTIO_CONFIG_S_NEEDS_RESET 0x40 45*4882a593Smuzhiyun /* We've given up on this device. */ 46*4882a593Smuzhiyun #define VIRTIO_CONFIG_S_FAILED 0x80 47*4882a593Smuzhiyun 48*4882a593Smuzhiyun /* 49*4882a593Smuzhiyun * Virtio feature bits VIRTIO_TRANSPORT_F_START through 50*4882a593Smuzhiyun * VIRTIO_TRANSPORT_F_END are reserved for the transport 51*4882a593Smuzhiyun * being used (e.g. virtio_ring, virtio_pci etc.), the 52*4882a593Smuzhiyun * rest are per-device feature bits. 53*4882a593Smuzhiyun */ 54*4882a593Smuzhiyun #define VIRTIO_TRANSPORT_F_START 28 55*4882a593Smuzhiyun #define VIRTIO_TRANSPORT_F_END 38 56*4882a593Smuzhiyun 57*4882a593Smuzhiyun #ifndef VIRTIO_CONFIG_NO_LEGACY 58*4882a593Smuzhiyun /* Do we get callbacks when the ring is completely used, even if we've 59*4882a593Smuzhiyun * suppressed them? */ 60*4882a593Smuzhiyun #define VIRTIO_F_NOTIFY_ON_EMPTY 24 61*4882a593Smuzhiyun 62*4882a593Smuzhiyun /* Can the device handle any descriptor layout? */ 63*4882a593Smuzhiyun #define VIRTIO_F_ANY_LAYOUT 27 64*4882a593Smuzhiyun #endif /* VIRTIO_CONFIG_NO_LEGACY */ 65*4882a593Smuzhiyun 66*4882a593Smuzhiyun /* v1.0 compliant. */ 67*4882a593Smuzhiyun #define VIRTIO_F_VERSION_1 32 68*4882a593Smuzhiyun 69*4882a593Smuzhiyun /* 70*4882a593Smuzhiyun * If clear - device has the platform DMA (e.g. IOMMU) bypass quirk feature. 71*4882a593Smuzhiyun * If set - use platform DMA tools to access the memory. 72*4882a593Smuzhiyun * 73*4882a593Smuzhiyun * Note the reverse polarity (compared to most other features), 74*4882a593Smuzhiyun * this is for compatibility with legacy systems. 75*4882a593Smuzhiyun */ 76*4882a593Smuzhiyun #define VIRTIO_F_ACCESS_PLATFORM 33 77*4882a593Smuzhiyun #ifndef __KERNEL__ 78*4882a593Smuzhiyun /* Legacy name for VIRTIO_F_ACCESS_PLATFORM (for compatibility with old userspace) */ 79*4882a593Smuzhiyun #define VIRTIO_F_IOMMU_PLATFORM VIRTIO_F_ACCESS_PLATFORM 80*4882a593Smuzhiyun #endif /* __KERNEL__ */ 81*4882a593Smuzhiyun 82*4882a593Smuzhiyun /* This feature indicates support for the packed virtqueue layout. */ 83*4882a593Smuzhiyun #define VIRTIO_F_RING_PACKED 34 84*4882a593Smuzhiyun 85*4882a593Smuzhiyun /* 86*4882a593Smuzhiyun * This feature indicates that memory accesses by the driver and the 87*4882a593Smuzhiyun * device are ordered in a way described by the platform. 88*4882a593Smuzhiyun */ 89*4882a593Smuzhiyun #define VIRTIO_F_ORDER_PLATFORM 36 90*4882a593Smuzhiyun 91*4882a593Smuzhiyun /* 92*4882a593Smuzhiyun * Does the device support Single Root I/O Virtualization? 93*4882a593Smuzhiyun */ 94*4882a593Smuzhiyun #define VIRTIO_F_SR_IOV 37 95*4882a593Smuzhiyun #endif /* _UAPI_LINUX_VIRTIO_CONFIG_H */ 96