| #ifndef _LINUX_VIRTIO_CONFIG_H |
| #define _LINUX_VIRTIO_CONFIG_H |
| /* This header, excluding the #ifdef __KERNEL__ part, is BSD licensed so |
| * anyone can use the definitions to implement compatible drivers/servers. */ |
| |
| /* Virtio devices use a standardized configuration space to define their |
| * features and pass configuration information, but each implementation can |
| * store and access that space differently. */ |
| #include <linux/types.h> |
| |
| /* Status byte for guest to report progress, and synchronize features. */ |
| /* We have seen device and processed generic fields (VIRTIO_CONFIG_F_VIRTIO) */ |
| #define VIRTIO_CONFIG_S_ACKNOWLEDGE 1 |
| /* We have found a driver for the device. */ |
| #define VIRTIO_CONFIG_S_DRIVER 2 |
| /* Driver has used its parts of the config, and is happy */ |
| #define VIRTIO_CONFIG_S_DRIVER_OK 4 |
| /* We've given up on this device. */ |
| #define VIRTIO_CONFIG_S_FAILED 0x80 |
| |
| /* Some virtio feature bits (currently bits 28 through 31) 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 32 |
| |
| /* Do we get callbacks when the ring is completely used, even if we've |
| * suppressed them? */ |
| #define VIRTIO_F_NOTIFY_ON_EMPTY 24 |
| |
| #endif /* _LINUX_VIRTIO_CONFIG_H */ |
