1 #include <linux/virtio_byteorder.h> 2 #include <linux/virtio.h> 3 #include <uapi/linux/virtio_config.h> 4 5 /* 6 * __virtio_test_bit - helper to test feature bits. For use by transports. 7 * Devices should normally use virtio_has_feature, 8 * which includes more checks. 9 * @vdev: the device 10 * @fbit: the feature bit 11 */ 12 static inline bool __virtio_test_bit(const struct virtio_device *vdev, 13 unsigned int fbit) 14 { 15 return vdev->features & (1ULL << fbit); 16 } 17 18 /** 19 * __virtio_set_bit - helper to set feature bits. For use by transports. 20 * @vdev: the device 21 * @fbit: the feature bit 22 */ 23 static inline void __virtio_set_bit(struct virtio_device *vdev, 24 unsigned int fbit) 25 { 26 vdev->features |= (1ULL << fbit); 27 } 28 29 /** 30 * __virtio_clear_bit - helper to clear feature bits. For use by transports. 31 * @vdev: the device 32 * @fbit: the feature bit 33 */ 34 static inline void __virtio_clear_bit(struct virtio_device *vdev, 35 unsigned int fbit) 36 { 37 vdev->features &= ~(1ULL << fbit); 38 } 39 40 #define virtio_has_feature(dev, feature) \ 41 (__virtio_test_bit((dev), feature)) 42 43 static inline u16 virtio16_to_cpu(struct virtio_device *vdev, __virtio16 val) 44 { 45 return __virtio16_to_cpu(virtio_has_feature(vdev, VIRTIO_F_VERSION_1), val); 46 } 47 48 static inline __virtio16 cpu_to_virtio16(struct virtio_device *vdev, u16 val) 49 { 50 return __cpu_to_virtio16(virtio_has_feature(vdev, VIRTIO_F_VERSION_1), val); 51 } 52 53 static inline u32 virtio32_to_cpu(struct virtio_device *vdev, __virtio32 val) 54 { 55 return __virtio32_to_cpu(virtio_has_feature(vdev, VIRTIO_F_VERSION_1), val); 56 } 57 58 static inline __virtio32 cpu_to_virtio32(struct virtio_device *vdev, u32 val) 59 { 60 return __cpu_to_virtio32(virtio_has_feature(vdev, VIRTIO_F_VERSION_1), val); 61 } 62 63 static inline u64 virtio64_to_cpu(struct virtio_device *vdev, __virtio64 val) 64 { 65 return __virtio64_to_cpu(virtio_has_feature(vdev, VIRTIO_F_VERSION_1), val); 66 } 67 68 static inline __virtio64 cpu_to_virtio64(struct virtio_device *vdev, u64 val) 69 { 70 return __cpu_to_virtio64(virtio_has_feature(vdev, VIRTIO_F_VERSION_1), val); 71 } 72 73