// Copyright 2018 The Chromium OS Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
mod backend;
mod protocol;
use std::cell::RefCell;
use std::collections::VecDeque;
use std::i64;
use std::mem::{self, size_of};
use std::num::NonZeroU8;
use std::os::unix::io::{AsRawFd, RawFd};
use std::path::PathBuf;
use std::rc::Rc;
use std::sync::atomic::{AtomicUsize, Ordering};
use std::sync::Arc;
use std::thread;
use std::time::Duration;
use data_model::*;
use sys_util::{
debug, error, warn, Error, EventFd, GuestAddress, GuestMemory, PollContext, PollToken,
};
use gpu_display::*;
use gpu_renderer::{Renderer, RendererFlags};
use super::{
copy_config, resource_bridge::*, AvailIter, Queue, VirtioDevice, INTERRUPT_STATUS_USED_RING,
TYPE_GPU, VIRTIO_F_VERSION_1,
};
use self::backend::Backend;
use self::protocol::*;
use crate::pci::{PciBarConfiguration, PciBarPrefetchable, PciBarRegionType};
use vm_control::VmMemoryControlRequestSocket;
// First queue is for virtio gpu commands. Second queue is for cursor commands, which we expect
// there to be fewer of.
const QUEUE_SIZES: &[u16] = &[256, 16];
const FENCE_POLL_MS: u64 = 1;
struct QueueDescriptor {
index: u16,
addr: GuestAddress,
len: u32,
data: Option<(GuestAddress, u32)>,
ret: Option<(GuestAddress, u32)>,
}
struct ReturnDescriptor {
index: u16,
len: u32,
}
struct FenceDescriptor {
fence_id: u32,
len: u32,
desc: QueueDescriptor,
}
struct Frontend {
ctrl_descriptors: VecDeque<QueueDescriptor>,
cursor_descriptors: VecDeque<QueueDescriptor>,
return_ctrl_descriptors: VecDeque<ReturnDescriptor>,
return_cursor_descriptors: VecDeque<ReturnDescriptor>,
fence_descriptors: Vec<FenceDescriptor>,
backend: Backend,
}
impl Frontend {
fn new(backend: Backend) -> Frontend {
Frontend {
ctrl_descriptors: Default::default(),
cursor_descriptors: Default::default(),
return_ctrl_descriptors: Default::default(),
return_cursor_descriptors: Default::default(),
fence_descriptors: Default::default(),
backend,
}
}
fn display(&self) -> &Rc<RefCell<GpuDisplay>> {
self.backend.display()
}
fn process_display(&mut self) -> bool {
self.backend.process_display()
}
fn process_resource_bridge(&self, resource_bridge: &ResourceResponseSocket) {
self.backend.process_resource_bridge(resource_bridge);
}
fn process_gpu_command(
&mut self,
mem: &GuestMemory,
cmd: GpuCommand,
data: Option<VolatileSlice>,
) -> GpuResponse {
self.backend.force_ctx_0();
match cmd {
GpuCommand::GetDisplayInfo(_) => {
GpuResponse::OkDisplayInfo(self.backend.display_info().to_vec())
}
GpuCommand::ResourceCreate2d(info) => self.backend.create_resource_2d(
info.resource_id.to_native(),
info.width.to_native(),
info.height.to_native(),
info.format.to_native(),
),
GpuCommand::ResourceUnref(info) => {
self.backend.unref_resource(info.resource_id.to_native())
}
GpuCommand::SetScanout(info) => self.backend.set_scanout(info.resource_id.to_native()),
GpuCommand::ResourceFlush(info) => self.backend.flush_resource(
info.resource_id.to_native(),
info.r.x.to_native(),
info.r.y.to_native(),
info.r.width.to_native(),
info.r.height.to_native(),
),
GpuCommand::TransferToHost2d(info) => self.backend.transfer_to_resource_2d(
info.resource_id.to_native(),
info.r.x.to_native(),
info.r.y.to_native(),
info.r.width.to_native(),
info.r.height.to_native(),
info.offset.to_native(),
mem,
),
GpuCommand::ResourceAttachBacking(info) if data.is_some() => {
let data = data.unwrap();
let entry_count = info.nr_entries.to_native() as usize;
let mut iovecs = Vec::with_capacity(entry_count);
for i in 0..entry_count {
if let Ok(entry_ref) =
data.get_ref((i * size_of::<virtio_gpu_mem_entry>()) as u64)
{
let entry: virtio_gpu_mem_entry = entry_ref.load();
let addr = GuestAddress(entry.addr.to_native());
let len = entry.length.to_native() as usize;
iovecs.push((addr, len))
} else {
return GpuResponse::ErrUnspec;
}
}
self.backend
.attach_backing(info.resource_id.to_native(), mem, iovecs)
}
GpuCommand::ResourceDetachBacking(info) => {
self.backend.detach_backing(info.resource_id.to_native())
}
GpuCommand::UpdateCursor(info) => self.backend.update_cursor(
info.resource_id.to_native(),
info.pos.x.into(),
info.pos.y.into(),
),
GpuCommand::MoveCursor(info) => self
.backend
.move_cursor(info.pos.x.into(), info.pos.y.into()),
GpuCommand::GetCapsetInfo(info) => {
self.backend.get_capset_info(info.capset_index.to_native())
}
GpuCommand::GetCapset(info) => self
.backend
.get_capset(info.capset_id.to_native(), info.capset_version.to_native()),
GpuCommand::CtxCreate(info) => self
.backend
.create_renderer_context(info.hdr.ctx_id.to_native()),
GpuCommand::CtxDestroy(info) => self
.backend
.destroy_renderer_context(info.hdr.ctx_id.to_native()),
GpuCommand::CtxAttachResource(info) => self
.backend
.context_attach_resource(info.hdr.ctx_id.to_native(), info.resource_id.to_native()),
GpuCommand::CtxDetachResource(info) => self
.backend
.context_detach_resource(info.hdr.ctx_id.to_native(), info.resource_id.to_native()),
GpuCommand::ResourceCreate3d(info) => {
let id = info.resource_id.to_native();
let target = info.target.to_native();
let format = info.format.to_native();
let bind = info.bind.to_native();
let width = info.width.to_native();
let height = info.height.to_native();
let depth = info.depth.to_native();
let array_size = info.array_size.to_native();
let last_level = info.last_level.to_native();
let nr_samples = info.nr_samples.to_native();
let flags = info.flags.to_native();
self.backend.resource_create_3d(
id, target, format, bind, width, height, depth, array_size, last_level,
nr_samples, flags,
)
}
GpuCommand::TransferToHost3d(info) => {
let ctx_id = info.hdr.ctx_id.to_native();
let res_id = info.resource_id.to_native();
let x = info.box_.x.to_native();
let y = info.box_.y.to_native();
let z = info.box_.z.to_native();
let width = info.box_.w.to_native();
let height = info.box_.h.to_native();
let depth = info.box_.d.to_native();
let level = info.level.to_native();
let stride = info.stride.to_native();
let layer_stride = info.layer_stride.to_native();
let offset = info.offset.to_native();
self.backend.transfer_to_resource_3d(
ctx_id,
res_id,
x,
y,
z,
width,
height,
depth,
level,
stride,
layer_stride,
offset,
)
}
GpuCommand::TransferFromHost3d(info) => {
let ctx_id = info.hdr.ctx_id.to_native();
let res_id = info.resource_id.to_native();
let x = info.box_.x.to_native();
let y = info.box_.y.to_native();
let z = info.box_.z.to_native();
let width = info.box_.w.to_native();
let height = info.box_.h.to_native();
let depth = info.box_.d.to_native();
let level = info.level.to_native();
let stride = info.stride.to_native();
let layer_stride = info.layer_stride.to_native();
let offset = info.offset.to_native();
self.backend.transfer_from_resource_3d(
ctx_id,
res_id,
x,
y,
z,
width,
height,
depth,
level,
stride,
layer_stride,
offset,
)
}
GpuCommand::CmdSubmit3d(info) => {
if data.is_some() {
let data = data.unwrap(); // guarded by this match arm
let cmd_size = info.size.to_native() as usize;
match data.get_slice(0, cmd_size as u64) {
Ok(cmd_slice) => {
let mut cmd_buf = vec![0; cmd_size];
cmd_slice.copy_to(&mut cmd_buf[..]);
self.backend
.submit_command(info.hdr.ctx_id.to_native(), &mut cmd_buf[..])
}
Err(_) => GpuResponse::ErrInvalidParameter,
}
} else {
// Silently accept empty command buffers to allow for
// benchmarking.
GpuResponse::OkNoData
}
}
_ => {
error!("unhandled command {:?}", cmd);
GpuResponse::ErrUnspec
}
}
}
fn take_descriptors(
mem: &GuestMemory,
desc_iter: AvailIter,
descriptors: &mut VecDeque<QueueDescriptor>,
return_descriptors: &mut VecDeque<ReturnDescriptor>,
) {
for desc in desc_iter {
if desc.len as usize >= size_of::<virtio_gpu_ctrl_hdr>() && !desc.is_write_only() {
let mut q_desc = QueueDescriptor {
index: desc.index,
addr: desc.addr,
len: desc.len,
data: None,
ret: None,
};
if let Some(extra_desc) = desc.next_descriptor() {
if extra_desc.is_write_only() {
q_desc.ret = Some((extra_desc.addr, extra_desc.len));
} else {
q_desc.data = Some((extra_desc.addr, extra_desc.len));
}
if let Some(extra_desc) = extra_desc.next_descriptor() {
if extra_desc.is_write_only() && q_desc.ret.is_none() {
q_desc.ret = Some((extra_desc.addr, extra_desc.len));
}
}
}
descriptors.push_back(q_desc);
} else {
let likely_type = mem.read_obj_from_addr(desc.addr).unwrap_or(Le32::from(0));
debug!(
"ctrl queue bad descriptor index = {} len = {} write = {} type = {}",
desc.index,
desc.len,
desc.is_write_only(),
virtio_gpu_cmd_str(likely_type.to_native())
);
return_descriptors.push_back(ReturnDescriptor {
index: desc.index,
len: 0,
});
}
}
}
fn take_ctrl_descriptors(&mut self, mem: &GuestMemory, desc_iter: AvailIter) {
Frontend::take_descriptors(
mem,
desc_iter,
&mut self.ctrl_descriptors,
&mut self.return_ctrl_descriptors,
);
}
fn take_cursor_descriptors(&mut self, mem: &GuestMemory, desc_iter: AvailIter) {
Frontend::take_descriptors(
mem,
desc_iter,
&mut self.cursor_descriptors,
&mut self.return_cursor_descriptors,
);
}
fn process_descriptor(
&mut self,
mem: &GuestMemory,
desc: QueueDescriptor,
) -> Option<ReturnDescriptor> {
let mut resp = GpuResponse::ErrUnspec;
let mut gpu_cmd = None;
let mut len = 0;
if let Ok(desc_mem) = mem.get_slice(desc.addr.offset(), desc.len as u64) {
match GpuCommand::decode(desc_mem) {
Ok(cmd) => {
match desc.data {
Some(data_desc) => {
match mem.get_slice(data_desc.0.offset(), data_desc.1 as u64) {
Ok(data_mem) => {
resp = self.process_gpu_command(mem, cmd, Some(data_mem))
}
Err(e) => debug!("ctrl queue invalid data descriptor: {}", e),
}
}
None => resp = self.process_gpu_command(mem, cmd, None),
}
gpu_cmd = Some(cmd);
}
Err(e) => debug!("ctrl queue decode error: {}", e),
}
}
if resp.is_err() {
debug!("{:?} -> {:?}", gpu_cmd, resp);
}
if let Some(ret_desc) = desc.ret {
if let Ok(ret_desc_mem) = mem.get_slice(ret_desc.0.offset(), ret_desc.1 as u64) {
let mut fence_id = 0;
let mut ctx_id = 0;
let mut flags = 0;
if let Some(cmd) = gpu_cmd {
let ctrl_hdr = cmd.ctrl_hdr();
if ctrl_hdr.flags.to_native() & VIRTIO_GPU_FLAG_FENCE != 0 {
fence_id = ctrl_hdr.fence_id.to_native();
ctx_id = ctrl_hdr.ctx_id.to_native();
flags = VIRTIO_GPU_FLAG_FENCE;
let fence_resp = self.backend.create_fence(ctx_id, fence_id as u32);
if fence_resp.is_err() {
warn!("create_fence {} -> {:?}", fence_id, fence_resp);
resp = fence_resp;
}
}
}
// Prepare the response now, even if it is going to wait until
// fence is complete.
match resp.encode(flags, fence_id, ctx_id, ret_desc_mem) {
Ok(l) => len = l,
Err(e) => debug!("ctrl queue response encode error: {}", e),
}
if flags & VIRTIO_GPU_FLAG_FENCE != 0 {
self.fence_descriptors.push(FenceDescriptor {
fence_id: fence_id as u32,
len,
desc,
});
return None;
}
// No fence, respond now.
}
}
Some(ReturnDescriptor {
index: desc.index,
len,
})
}
fn process_ctrl(&mut self, mem: &GuestMemory) -> Option<ReturnDescriptor> {
self.return_ctrl_descriptors.pop_front().or_else(|| {
self.ctrl_descriptors
.pop_front()
.and_then(|desc| self.process_descriptor(mem, desc))
})
}
fn process_cursor(&mut self, mem: &GuestMemory) -> Option<ReturnDescriptor> {
self.return_cursor_descriptors.pop_front().or_else(|| {
self.cursor_descriptors
.pop_front()
.and_then(|desc| self.process_descriptor(mem, desc))
})
}
fn fence_poll(&mut self) {
let fence_id = self.backend.fence_poll();
let return_descs = &mut self.return_ctrl_descriptors;
self.fence_descriptors.retain(|f_desc| {
if f_desc.fence_id > fence_id {
true
} else {
return_descs.push_back(ReturnDescriptor {
index: f_desc.desc.index,
len: f_desc.len,
});
false
}
})
}
}
struct Worker {
exit_evt: EventFd,
mem: GuestMemory,
interrupt_evt: EventFd,
interrupt_resample_evt: EventFd,
interrupt_status: Arc<AtomicUsize>,
ctrl_queue: Queue,
ctrl_evt: EventFd,
cursor_queue: Queue,
cursor_evt: EventFd,
resource_bridges: Vec<ResourceResponseSocket>,
kill_evt: EventFd,
state: Frontend,
}
impl Worker {
fn signal_used_queue(&self) {
self.interrupt_status
.fetch_or(INTERRUPT_STATUS_USED_RING as usize, Ordering::SeqCst);
let _ = self.interrupt_evt.write(1);
}
fn run(&mut self) {
#[derive(PollToken)]
enum Token {
CtrlQueue,
CursorQueue,
Display,
InterruptResample,
Kill,
ResourceBridge { index: usize },
}
let poll_ctx: PollContext<Token> = match PollContext::build_with(&[
(&self.ctrl_evt, Token::CtrlQueue),
(&self.cursor_evt, Token::CursorQueue),
(&*self.state.display().borrow(), Token::Display),
(&self.interrupt_resample_evt, Token::InterruptResample),
(&self.kill_evt, Token::Kill),
]) {
Ok(pc) => pc,
Err(e) => {
error!("failed creating PollContext: {}", e);
return;
}
};
for (index, bridge) in self.resource_bridges.iter().enumerate() {
if let Err(e) = poll_ctx.add(bridge, Token::ResourceBridge { index }) {
error!("failed to add resource bridge to PollContext: {}", e);
}
}
// Declare this outside the loop so we don't keep allocating and freeing the vector.
let mut process_resource_bridge = Vec::with_capacity(self.resource_bridges.len());
'poll: loop {
// If there are outstanding fences, wake up early to poll them.
let duration = if !self.state.fence_descriptors.is_empty() {
Duration::from_millis(FENCE_POLL_MS)
} else {
Duration::new(i64::MAX as u64, 0)
};
let events = match poll_ctx.wait_timeout(duration) {
Ok(v) => v,
Err(e) => {
error!("failed polling for events: {}", e);
break;
}
};
let mut signal_used = false;
// Clear the old values and re-initialize with false.
process_resource_bridge.clear();
process_resource_bridge.resize(self.resource_bridges.len(), false);
for event in events.iter_readable() {
match event.token() {
Token::CtrlQueue => {
let _ = self.ctrl_evt.read();
self.state
.take_ctrl_descriptors(&self.mem, self.ctrl_queue.iter(&self.mem));
}
Token::CursorQueue => {
let _ = self.cursor_evt.read();
self.state
.take_cursor_descriptors(&self.mem, self.cursor_queue.iter(&self.mem));
}
Token::Display => {
let close_requested = self.state.process_display();
if close_requested {
let _ = self.exit_evt.write(1);
}
}
Token::ResourceBridge { index } => process_resource_bridge[index] = true,
Token::InterruptResample => {
let _ = self.interrupt_resample_evt.read();
if self.interrupt_status.load(Ordering::SeqCst) != 0 {
self.interrupt_evt.write(1).unwrap();
}
}
Token::Kill => {
break 'poll;
}
}
}
// All cursor commands go first because they have higher priority.
while let Some(desc) = self.state.process_cursor(&self.mem) {
self.cursor_queue.add_used(&self.mem, desc.index, desc.len);
signal_used = true;
}
self.state.fence_poll();
while let Some(desc) = self.state.process_ctrl(&self.mem) {
self.ctrl_queue.add_used(&self.mem, desc.index, desc.len);
signal_used = true;
}
// Process the entire control queue before the resource bridge in case a resource is
// created or destroyed by the control queue. Processing the resource bridge first may
// lead to a race condition.
for (bridge, &should_process) in
self.resource_bridges.iter().zip(&process_resource_bridge)
{
if should_process {
self.state.process_resource_bridge(bridge);
}
}
if signal_used {
self.signal_used_queue();
}
}
}
}
/// Indicates a backend that should be tried for the gpu to use for display.
///
/// Several instances of this enum are used in an ordered list to give the gpu device many backends
/// to use as fallbacks in case some do not work.
#[derive(Clone)]
pub enum DisplayBackend {
/// Use the wayland backend with the given socket path if given.
Wayland(Option<PathBuf>),
/// Open a connection to the X server at the given display if given.
X(Option<String>),
/// Emulate a display without actually displaying it.
Null,
}
impl DisplayBackend {
fn build(&self) -> std::result::Result<GpuDisplay, GpuDisplayError> {
match self {
DisplayBackend::Wayland(path) => GpuDisplay::open_wayland(path.as_ref()),
DisplayBackend::X(display) => GpuDisplay::open_x(display.as_ref()),
DisplayBackend::Null => unimplemented!(),
}
}
fn is_x(&self) -> bool {
match self {
DisplayBackend::X(_) => true,
_ => false,
}
}
}
// Builds a gpu backend with one of the given possible display backends, or None if they all
// failed.
fn build_backend(
possible_displays: &[DisplayBackend],
gpu_device_socket: VmMemoryControlRequestSocket,
) -> Option<Backend> {
let mut renderer_flags = RendererFlags::default();
let mut display_opt = None;
for display in possible_displays {
match display.build() {
Ok(c) => {
// If X11 is being used, that's an indication that the renderer should also be using
// glx. Otherwise, we are likely in an enviroment in which GBM will work for doing
// allocations of buffers we wish to display. TODO(zachr): this is a heuristic (or
// terrible hack depending on your POV). We should do something either smarter or
// more configurable
if display.is_x() {
renderer_flags = RendererFlags::new().use_glx(true);
}
display_opt = Some(c);
break;
}
Err(e) => error!("failed to open display: {}", e),
};
}
let display = match display_opt {
Some(d) => d,
None => {
error!("failed to open any displays");
return None;
}
};
if cfg!(debug_assertions) {
let ret = unsafe { libc::dup2(libc::STDOUT_FILENO, libc::STDERR_FILENO) };
if ret == -1 {
warn!("unable to dup2 stdout to stderr: {}", Error::last());
}
}
let renderer = match Renderer::init(renderer_flags) {
Ok(r) => r,
Err(e) => {
error!("failed to initialize gpu renderer: {}", e);
return None;
}
};
Some(Backend::new(display, renderer, gpu_device_socket))
}
pub struct Gpu {
config_event: bool,
exit_evt: EventFd,
gpu_device_socket: Option<VmMemoryControlRequestSocket>,
resource_bridges: Vec<ResourceResponseSocket>,
kill_evt: Option<EventFd>,
worker_thread: Option<thread::JoinHandle<()>>,
num_scanouts: NonZeroU8,
display_backends: Vec<DisplayBackend>,
}
impl Gpu {
pub fn new(
exit_evt: EventFd,
gpu_device_socket: Option<VmMemoryControlRequestSocket>,
num_scanouts: NonZeroU8,
resource_bridges: Vec<ResourceResponseSocket>,
display_backends: Vec<DisplayBackend>,
) -> Gpu {
Gpu {
config_event: false,
exit_evt,
gpu_device_socket,
resource_bridges,
kill_evt: None,
worker_thread: None,
num_scanouts,
display_backends,
}
}
fn get_config(&self) -> virtio_gpu_config {
let mut events_read = 0;
if self.config_event {
events_read |= VIRTIO_GPU_EVENT_DISPLAY;
}
virtio_gpu_config {
events_read: Le32::from(events_read),
events_clear: Le32::from(0),
num_scanouts: Le32::from(self.num_scanouts.get() as u32),
num_capsets: Le32::from(3),
}
}
}
impl Drop for Gpu {
fn drop(&mut self) {
if let Some(kill_evt) = self.kill_evt.take() {
// Ignore the result because there is nothing we can do about it.
let _ = kill_evt.write(1);
}
if let Some(worker_thread) = self.worker_thread.take() {
let _ = worker_thread.join();
}
}
}
impl VirtioDevice for Gpu {
fn keep_fds(&self) -> Vec<RawFd> {
let mut keep_fds = Vec::new();
// TODO(davidriley): Remove once virgl has another path to include
// debugging logs.
if cfg!(debug_assertions) {
keep_fds.push(libc::STDOUT_FILENO);
keep_fds.push(libc::STDERR_FILENO);
}
if let Some(ref gpu_device_socket) = self.gpu_device_socket {
keep_fds.push(gpu_device_socket.as_raw_fd());
}
keep_fds.push(self.exit_evt.as_raw_fd());
for bridge in &self.resource_bridges {
keep_fds.push(bridge.as_raw_fd());
}
keep_fds
}
fn device_type(&self) -> u32 {
TYPE_GPU
}
fn queue_max_sizes(&self) -> &[u16] {
QUEUE_SIZES
}
fn features(&self) -> u64 {
1 << VIRTIO_GPU_F_VIRGL | 1 << VIRTIO_F_VERSION_1
}
fn ack_features(&mut self, value: u64) {
let _ = value;
}
fn read_config(&self, offset: u64, data: &mut [u8]) {
copy_config(data, 0, self.get_config().as_slice(), offset);
}
fn write_config(&mut self, offset: u64, data: &[u8]) {
let mut cfg = self.get_config();
copy_config(cfg.as_mut_slice(), offset, data, 0);
if (cfg.events_clear.to_native() & VIRTIO_GPU_EVENT_DISPLAY) != 0 {
self.config_event = false;
}
}
fn activate(
&mut self,
mem: GuestMemory,
interrupt_evt: EventFd,
interrupt_resample_evt: EventFd,
interrupt_status: Arc<AtomicUsize>,
mut queues: Vec<Queue>,
mut queue_evts: Vec<EventFd>,
) {
if queues.len() != QUEUE_SIZES.len() || queue_evts.len() != QUEUE_SIZES.len() {
return;
}
let exit_evt = match self.exit_evt.try_clone() {
Ok(e) => e,
Err(e) => {
error!("error cloning exit eventfd: {}", e);
return;
}
};
let (self_kill_evt, kill_evt) = match EventFd::new().and_then(|e| Ok((e.try_clone()?, e))) {
Ok(v) => v,
Err(e) => {
error!("error creating kill EventFd pair: {}", e);
return;
}
};
self.kill_evt = Some(self_kill_evt);
let resource_bridges = mem::replace(&mut self.resource_bridges, Vec::new());
let ctrl_queue = queues.remove(0);
let ctrl_evt = queue_evts.remove(0);
let cursor_queue = queues.remove(0);
let cursor_evt = queue_evts.remove(0);
let display_backends = self.display_backends.clone();
if let Some(gpu_device_socket) = self.gpu_device_socket.take() {
let worker_result =
thread::Builder::new()
.name("virtio_gpu".to_string())
.spawn(move || {
let backend = match build_backend(&display_backends, gpu_device_socket) {
Some(backend) => backend,
None => return,
};
Worker {
exit_evt,
mem,
interrupt_evt,
interrupt_resample_evt,
interrupt_status,
ctrl_queue,
ctrl_evt,
cursor_queue,
cursor_evt,
resource_bridges,
kill_evt,
state: Frontend::new(backend),
}
.run()
});
match worker_result {
Err(e) => {
error!("failed to spawn virtio_gpu worker: {}", e);
return;
}
Ok(join_handle) => {
self.worker_thread = Some(join_handle);
}
}
}
}
// Require 1 BAR for mapping 3D buffers
fn get_device_bars(&self) -> Vec<PciBarConfiguration> {
vec![PciBarConfiguration::new(
4,
1 << 33,
PciBarRegionType::Memory64BitRegion,
PciBarPrefetchable::NotPrefetchable,
)]
}
}