1 // Copyright 2021 The ChromiumOS Authors 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 use vmm_vhost::message::VhostUserProtocolFeatures; 6 7 use crate::virtio::vhost::user::vmm::Connection; 8 use crate::virtio::vhost::user::vmm::QueueSizes; 9 use crate::virtio::vhost::user::vmm::Result; 10 use crate::virtio::vhost::user::vmm::VhostUserVirtioDevice; 11 use crate::virtio::DeviceType; 12 13 const QUEUE_SIZE: u16 = 1024; 14 15 // control, event, tx, and rx queues 16 const NUM_QUEUES: usize = 4; 17 18 impl VhostUserVirtioDevice { new_snd(base_features: u64, connection: Connection) -> Result<VhostUserVirtioDevice>19 pub fn new_snd(base_features: u64, connection: Connection) -> Result<VhostUserVirtioDevice> { 20 let queue_sizes = QueueSizes::AskDevice { 21 queue_size: QUEUE_SIZE, 22 default_queues: NUM_QUEUES, 23 }; 24 let max_queues = NUM_QUEUES; 25 26 let allow_features = 0; 27 let allow_protocol_features = 28 VhostUserProtocolFeatures::MQ | VhostUserProtocolFeatures::CONFIG; 29 30 VhostUserVirtioDevice::new( 31 connection, 32 DeviceType::Sound, 33 queue_sizes, 34 max_queues, 35 allow_features, 36 allow_protocol_features, 37 base_features, 38 None, 39 false, 40 ) 41 } 42 } 43