runtime: support coremgmt on satellites

src/runtime/src/comms.rs

@@ -783,7 +783,7 @@ pub fn main(timer: GlobalTimer, cfg: Config) {
         }
     }
 
-    mgmt::start(cfg);
+    mgmt::start(cfg, Some((&aux_mutex, &drtio_routing_table, timer)));
 
     task::spawn(async move {
         let connection = Rc::new(Semaphore::new(1, 1));
@@ -886,7 +886,7 @@ pub fn soft_panic_main(timer: GlobalTimer, cfg: Config) -> ! {
 
     Sockets::init(32);
 
-    mgmt::start(cfg);
+    mgmt::start(cfg, None);
 
     // getting eth settings disables the LED as it resets GPIO
     // need to re-enable it here

src/runtime/src/mgmt.rs

@@ -1,16 +1,21 @@
 use alloc::{rc::Rc, string::String, vec::Vec};
-use core::cell::RefCell;
+use core::{cell::RefCell, ops::Deref};
 
 use futures::{future::poll_fn, task::Poll};
 use libasync::{smoltcp::TcpStream, task};
-use libboard_artiq::logger::{BufferLogger, LogBufferRef};
+use libboard_artiq::{drtio_routing,
-use libboard_zynq::{slcr, smoltcp};
+                     drtio_routing::RoutingTable,
+                     logger::{BufferLogger, LogBufferRef}};
+use libboard_zynq::{slcr, smoltcp, timer::GlobalTimer};
 use libconfig::Config;
+use libcortex_a9::mutex::Mutex;
 use log::{self, debug, error, info, warn, LevelFilter};
 use num_derive::FromPrimitive;
 use num_traits::FromPrimitive;
 
 use crate::proto_async::*;
+#[cfg(has_drtio)]
+use crate::rtio_mgt::*;
 
 #[derive(Debug, Clone, Copy, PartialEq, Eq)]
 pub enum Error {
@@ -18,6 +23,8 @@ pub enum Error {
     UnknownLogLevel(u8),
     UnexpectedPattern,
     UnrecognizedPacket,
+    #[cfg(has_drtio)]
+    DrtioError(drtio::Error),
 }
 
 type Result<T> = core::result::Result<T, Error>;
@@ -29,6 +36,8 @@ impl core::fmt::Display for Error {
             &Error::UnknownLogLevel(lvl) => write!(f, "unknown log level {}", lvl),
             &Error::UnexpectedPattern => write!(f, "unexpected pattern"),
             &Error::UnrecognizedPacket => write!(f, "unrecognized packet"),
+            #[cfg(has_drtio)]
+            &Error::DrtioError(error) => write!(f, "drtio error: {}", error),
         }
     }
 }
@@ -39,6 +48,13 @@ impl From<smoltcp::Error> for Error {
     }
 }
 
+#[cfg(has_drtio)]
+impl From<drtio::Error> for Error {
+    fn from(error: drtio::Error) -> Self {
+        Error::DrtioError(error)
+    }
+}
+
 #[derive(Debug, FromPrimitive)]
 pub enum Request {
     GetLog = 1,
@@ -51,6 +67,9 @@ pub enum Request {
     ConfigRead = 12,
     ConfigWrite = 13,
     ConfigRemove = 14,
+    ConfigErase = 15,
+
+    DebugAllocator = 8,
 }
 
 #[repr(i8)]
@@ -111,30 +130,510 @@ async fn read_key(stream: &mut TcpStream) -> Result<String> {
     Ok(String::from_utf8(buffer).unwrap())
 }
 
-async fn handle_connection(stream: &mut TcpStream, pull_id: Rc<RefCell<u32>>, cfg: Rc<Config>) -> Result<()> {
+#[cfg(has_drtio)]
-    if !expect(&stream, b"ARTIQ management\n").await? {
+mod remote_coremgmt {
-        return Err(Error::UnexpectedPattern);
+    use io::{Cursor, ProtoWrite};
-    }
+    use libboard_artiq::drtioaux_proto::{Packet, MASTER_PAYLOAD_MAX_SIZE};
-    stream.send_slice("e".as_bytes()).await?;
 
+    use super::*;
+    use crate::rtio_mgt::drtio;
+
+    pub async fn get_log(
+        stream: &mut TcpStream,
+        aux_mutex: &Rc<Mutex<bool>>,
+        routing_table: &drtio_routing::RoutingTable,
+        timer: GlobalTimer,
+        linkno: u8,
+        destination: u8,
+    ) -> Result<()> {
+        let mut buffer = Vec::new();
         loop {
-        let msg = read_i8(stream).await;
+            let reply = drtio::aux_transact(
-        if let Err(smoltcp::Error::Finished) = msg {
+                aux_mutex,
+                linkno,
+                routing_table,
+                &Packet::CoreMgmtGetLogRequest {
+                    destination,
+                    clear: false,
+                },
+                timer,
+            )
+            .await;
+
+            match reply {
+                Ok(Packet::CoreMgmtGetLogReply { last, length, data }) => {
+                    buffer.extend(&data[..length as usize]);
+                    if last {
+                        write_i8(stream, Reply::LogContent as i8).await?;
+                        write_chunk(stream, &buffer).await?;
                         return Ok(());
                     }
-        let msg: Request = FromPrimitive::from_i8(msg?).ok_or(Error::UnrecognizedPacket)?;
+                }
-        match msg {
+                Ok(packet) => {
-            Request::GetLog => {
+                    error!("received unexpected aux packet: {:?}", packet);
+                    write_i8(stream, Reply::Error as i8).await?;
+                    return Err(drtio::Error::UnexpectedReply.into());
+                }
+                Err(e) => {
+                    error!("aux packet error ({})", e);
+                    write_i8(stream, Reply::Error as i8).await?;
+                    return Err(e.into());
+                }
+            }
+        }
+    }
+
+    pub async fn clear_log(
+        stream: &mut TcpStream,
+        aux_mutex: &Rc<Mutex<bool>>,
+        routing_table: &drtio_routing::RoutingTable,
+        timer: GlobalTimer,
+        linkno: u8,
+        destination: u8,
+    ) -> Result<()> {
+        let reply = drtio::aux_transact(
+            aux_mutex,
+            linkno,
+            routing_table,
+            &Packet::CoreMgmtClearLogRequest { destination },
+            timer,
+        )
+        .await;
+
+        match reply {
+            Ok(Packet::CoreMgmtAck) => {
+                write_i8(stream, Reply::Success as i8).await?;
+                Ok(())
+            }
+            Ok(packet) => {
+                error!("received unexpected aux packet: {:?}", packet);
+                write_i8(stream, Reply::Error as i8).await?;
+                Err(drtio::Error::UnexpectedReply.into())
+            }
+            Err(e) => {
+                error!("aux packet error ({})", e);
+                write_i8(stream, Reply::Error as i8).await?;
+                Err(e.into())
+            }
+        }
+    }
+
+    pub async fn pull_log(
+        stream: &mut TcpStream,
+        aux_mutex: &Rc<Mutex<bool>>,
+        routing_table: &drtio_routing::RoutingTable,
+        timer: GlobalTimer,
+        linkno: u8,
+        destination: u8,
+        pull_id: &Rc<RefCell<u32>>,
+    ) -> Result<()> {
+        let id = {
+            let mut guard = pull_id.borrow_mut();
+            *guard += 1;
+            *guard
+        };
+        loop {
+            if id != *pull_id.borrow() {
+                // another connection attempts to pull the log...
+                // abort this connection...
+                break;
+            }
+
+            let reply = drtio::aux_transact(
+                aux_mutex,
+                linkno,
+                routing_table,
+                &Packet::CoreMgmtGetLogRequest {
+                    destination,
+                    clear: true,
+                },
+                timer,
+            )
+            .await;
+
+            match reply {
+                Ok(Packet::CoreMgmtGetLogReply { last: _, length, data }) => {
+                    write_chunk(stream, &data[..length as usize]).await?;
+                }
+                Ok(packet) => {
+                    error!("received unexpected aux packet: {:?}", packet);
+                    return Err(drtio::Error::UnexpectedReply.into());
+                }
+                Err(e) => {
+                    error!("aux packet error ({})", e);
+                    return Err(e.into());
+                }
+            }
+        }
+
+        Ok(())
+    }
+
+    pub async fn set_log_filter(
+        stream: &mut TcpStream,
+        aux_mutex: &Rc<Mutex<bool>>,
+        routing_table: &drtio_routing::RoutingTable,
+        timer: GlobalTimer,
+        linkno: u8,
+        destination: u8,
+        level: LevelFilter,
+    ) -> Result<()> {
+        let reply = drtio::aux_transact(
+            aux_mutex,
+            linkno,
+            routing_table,
+            &Packet::CoreMgmtSetLogLevelRequest {
+                destination,
+                log_level: level as u8,
+            },
+            timer,
+        )
+        .await;
+
+        match reply {
+            Ok(Packet::CoreMgmtAck) => {
+                write_i8(stream, Reply::Success as i8).await?;
+                Ok(())
+            }
+            Ok(packet) => {
+                error!("received unexpected aux packet: {:?}", packet);
+                write_i8(stream, Reply::Error as i8).await?;
+                Err(drtio::Error::UnexpectedReply.into())
+            }
+            Err(e) => {
+                error!("aux packet error ({})", e);
+                write_i8(stream, Reply::Error as i8).await?;
+                Err(e.into())
+            }
+        }
+    }
+
+    pub async fn set_uart_log_filter(
+        stream: &mut TcpStream,
+        aux_mutex: &Rc<Mutex<bool>>,
+        routing_table: &drtio_routing::RoutingTable,
+        timer: GlobalTimer,
+        linkno: u8,
+        destination: u8,
+        level: LevelFilter,
+    ) -> Result<()> {
+        let reply = drtio::aux_transact(
+            aux_mutex,
+            linkno,
+            routing_table,
+            &Packet::CoreMgmtSetUartLogLevelRequest {
+                destination,
+                log_level: level as u8,
+            },
+            timer,
+        )
+        .await;
+
+        match reply {
+            Ok(Packet::CoreMgmtAck) => {
+                write_i8(stream, Reply::Success as i8).await?;
+                Ok(())
+            }
+            Ok(packet) => {
+                error!("received unexpected aux packet: {:?}", packet);
+                write_i8(stream, Reply::Error as i8).await?;
+                Err(drtio::Error::UnexpectedReply.into())
+            }
+            Err(e) => {
+                error!("aux packet error ({})", e);
+                write_i8(stream, Reply::Error as i8).await?;
+                Err(e.into())
+            }
+        }
+    }
+
+    pub async fn config_read(
+        stream: &mut TcpStream,
+        aux_mutex: &Rc<Mutex<bool>>,
+        routing_table: &drtio_routing::RoutingTable,
+        timer: GlobalTimer,
+        linkno: u8,
+        destination: u8,
+        _cfg: &Rc<Config>,
+        key: &String,
+    ) -> Result<()> {
+        let mut config_key: [u8; MASTER_PAYLOAD_MAX_SIZE] = [0; MASTER_PAYLOAD_MAX_SIZE];
+        let len = key.len();
+        config_key[..len].clone_from_slice(key.as_bytes());
+
+        let mut reply = drtio::aux_transact(
+            aux_mutex,
+            linkno,
+            routing_table,
+            &Packet::CoreMgmtConfigReadRequest {
+                destination: destination,
+                length: len as u16,
+                key: config_key,
+            },
+            timer,
+        )
+        .await;
+
+        let mut buffer = Vec::<u8>::new();
+        loop {
+            match reply {
+                Ok(Packet::CoreMgmtConfigReadReply { last, length, value }) => {
+                    buffer.extend(&value[..length as usize]);
+
+                    if last {
+                        write_i8(stream, Reply::ConfigData as i8).await?;
+                        write_chunk(stream, &buffer).await?;
+                        return Ok(());
+                    }
+
+                    reply = drtio::aux_transact(
+                        aux_mutex,
+                        linkno,
+                        routing_table,
+                        &Packet::CoreMgmtConfigReadContinue {
+                            destination: destination,
+                        },
+                        timer,
+                    )
+                    .await;
+                }
+                Ok(packet) => {
+                    error!("received unexpected aux packet: {:?}", packet);
+                    write_i8(stream, Reply::Error as i8).await?;
+                    return Err(drtio::Error::UnexpectedReply.into());
+                }
+                Err(e) => {
+                    error!("aux packet error ({})", e);
+                    write_i8(stream, Reply::Error as i8).await?;
+                    return Err(e.into());
+                }
+            }
+        }
+    }
+
+    pub async fn config_write(
+        stream: &mut TcpStream,
+        aux_mutex: &Rc<Mutex<bool>>,
+        routing_table: &drtio_routing::RoutingTable,
+        timer: GlobalTimer,
+        linkno: u8,
+        destination: u8,
+        _cfg: &Rc<Config>,
+        key: &String,
+        value: Vec<u8>,
+    ) -> Result<()> {
+        let mut message = Cursor::new(Vec::with_capacity(key.len() + value.len() + 4 * 2));
+        message.write_string(key).unwrap();
+        message.write_bytes(&value).unwrap();
+
+        match drtio::partition_data(
+            linkno,
+            aux_mutex,
+            routing_table,
+            timer,
+            message.get_ref(),
+            |slice, status, len: usize| Packet::CoreMgmtConfigWriteRequest {
+                destination: destination,
+                last: status.is_last(),
+                length: len as u16,
+                data: *slice,
+            },
+            |reply| match reply {
+                Packet::CoreMgmtAck => Ok(()),
+                packet => {
+                    error!("received unexpected aux packet: {:?}", packet);
+                    Err(drtio::Error::UnexpectedReply)
+                }
+            },
+        )
+        .await
+        {
+            Ok(()) => {
+                write_i8(stream, Reply::Success as i8).await?;
+                Ok(())
+            }
+            Err(e) => {
+                error!("aux packet error ({})", e);
+                write_i8(stream, Reply::Error as i8).await?;
+                Err(e.into())
+            }
+        }
+    }
+
+    pub async fn config_remove(
+        stream: &mut TcpStream,
+        aux_mutex: &Rc<Mutex<bool>>,
+        routing_table: &drtio_routing::RoutingTable,
+        timer: GlobalTimer,
+        linkno: u8,
+        destination: u8,
+        _cfg: &Rc<Config>,
+        key: &String,
+    ) -> Result<()> {
+        let mut config_key: [u8; MASTER_PAYLOAD_MAX_SIZE] = [0; MASTER_PAYLOAD_MAX_SIZE];
+        let len = key.len();
+        config_key[..len].clone_from_slice(key.as_bytes());
+
+        let reply = drtio::aux_transact(
+            aux_mutex,
+            linkno,
+            routing_table,
+            &Packet::CoreMgmtConfigRemoveRequest {
+                destination: destination,
+                length: len as u16,
+                key: config_key,
+            },
+            timer,
+        )
+        .await;
+
+        match reply {
+            Ok(Packet::CoreMgmtAck) => {
+                write_i8(stream, Reply::Success as i8).await?;
+                Ok(())
+            }
+            Ok(packet) => {
+                error!("received unexpected aux packet: {:?}", packet);
+                write_i8(stream, Reply::Error as i8).await?;
+                Err(drtio::Error::UnexpectedReply.into())
+            }
+            Err(e) => {
+                error!("aux packet error ({})", e);
+                write_i8(stream, Reply::Error as i8).await?;
+                Err(e.into())
+            }
+        }
+    }
+
+    pub async fn config_erase(
+        stream: &mut TcpStream,
+        aux_mutex: &Rc<Mutex<bool>>,
+        routing_table: &drtio_routing::RoutingTable,
+        timer: GlobalTimer,
+        linkno: u8,
+        destination: u8,
+    ) -> Result<()> {
+        let reply = drtio::aux_transact(
+            aux_mutex,
+            linkno,
+            routing_table,
+            &Packet::CoreMgmtConfigEraseRequest {
+                destination: destination,
+            },
+            timer,
+        )
+        .await;
+
+        match reply {
+            Ok(Packet::CoreMgmtAck) => {
+                write_i8(stream, Reply::Success as i8).await?;
+                Ok(())
+            }
+            Ok(packet) => {
+                error!("received unexpected aux packet: {:?}", packet);
+                write_i8(stream, Reply::Error as i8).await?;
+                Err(drtio::Error::UnexpectedReply.into())
+            }
+            Err(e) => {
+                error!("aux packet error ({})", e);
+                write_i8(stream, Reply::Error as i8).await?;
+                Err(e.into())
+            }
+        }
+    }
+
+    pub async fn reboot(
+        stream: &mut TcpStream,
+        aux_mutex: &Rc<Mutex<bool>>,
+        routing_table: &drtio_routing::RoutingTable,
+        timer: GlobalTimer,
+        linkno: u8,
+        destination: u8,
+    ) -> Result<()> {
+        info!("initited reboot request to satellite destination {}", destination);
+        let reply = drtio::aux_transact(
+            aux_mutex,
+            linkno,
+            routing_table,
+            &Packet::CoreMgmtRebootRequest {
+                destination: destination,
+            },
+            timer,
+        )
+        .await;
+
+        match reply {
+            Ok(Packet::CoreMgmtAck) => {
+                write_i8(stream, Reply::RebootImminent as i8).await?;
+                Ok(())
+            }
+            Ok(packet) => {
+                error!("received unexpected aux packet: {:?}", packet);
+                write_i8(stream, Reply::Error as i8).await?;
+                Err(drtio::Error::UnexpectedReply.into())
+            }
+            Err(e) => {
+                error!("aux packet error ({})", e);
+                write_i8(stream, Reply::Error as i8).await?;
+                Err(e.into())
+            }
+        }
+    }
+
+    pub async fn debug_allocator(
+        stream: &mut TcpStream,
+        aux_mutex: &Rc<Mutex<bool>>,
+        routing_table: &drtio_routing::RoutingTable,
+        timer: GlobalTimer,
+        linkno: u8,
+        destination: u8,
+    ) -> Result<()> {
+        let reply = drtio::aux_transact(
+            aux_mutex,
+            linkno,
+            routing_table,
+            &Packet::CoreMgmtAllocatorDebugRequest {
+                destination: destination,
+            },
+            timer,
+        )
+        .await;
+
+        match reply {
+            Ok(Packet::CoreMgmtAck) => {
+                write_i8(stream, Reply::Success as i8).await?;
+                Ok(())
+            }
+            Ok(packet) => {
+                error!("received unexpected aux packet: {:?}", packet);
+                Err(drtio::Error::UnexpectedReply.into())
+            }
+            Err(e) => {
+                error!("aux packet error ({})", e);
+                Err(e.into())
+            }
+        }
+    }
+}
+
+mod local_coremgmt {
+    use super::*;
+
+    pub async fn get_log(stream: &mut TcpStream) -> Result<()> {
         let buffer = get_logger_buffer().await.extract().as_bytes().to_vec();
         write_i8(stream, Reply::LogContent as i8).await?;
         write_chunk(stream, &buffer).await?;
+        Ok(())
     }
-            Request::ClearLog => {
+
+    pub async fn clear_log(stream: &mut TcpStream) -> Result<()> {
         let mut buffer = get_logger_buffer().await;
         buffer.clear();
         write_i8(stream, Reply::Success as i8).await?;
+        Ok(())
     }
-            Request::PullLog => {
+
+    pub async fn pull_log(stream: &mut TcpStream, pull_id: &Rc<RefCell<u32>>) -> Result<()> {
         let id = {
             let mut guard = pull_id.borrow_mut();
             *guard += 1;
@@ -159,24 +658,26 @@ async fn handle_connection(stream: &mut TcpStream, pull_id: Rc<RefCell<u32>>, cf
                 logger.set_buffer_log_level(LevelFilter::Trace);
             }
         }
+        Ok(())
     }
-            Request::SetLogFilter => {
+
-                let lvl = read_log_level_filter(stream).await?;
+    pub async fn set_log_filter(stream: &mut TcpStream, lvl: LevelFilter) -> Result<()> {
         info!("Changing log level to {}", lvl);
         log::set_max_level(lvl);
         write_i8(stream, Reply::Success as i8).await?;
+        Ok(())
     }
-            Request::SetUartLogFilter => {
+
-                let lvl = read_log_level_filter(stream).await?;
+    pub async fn set_uart_log_filter(stream: &mut TcpStream, lvl: LevelFilter) -> Result<()> {
         info!("Changing UART log level to {}", lvl);
         unsafe {
             BufferLogger::get_logger().as_ref().unwrap().set_uart_log_level(lvl);
         }
         write_i8(stream, Reply::Success as i8).await?;
+        Ok(())
     }
-            Request::ConfigRead => {
+
-                let key = read_key(stream).await?;
+    pub async fn config_read(stream: &mut TcpStream, cfg: &Rc<Config>, key: &String) -> Result<()> {
-                debug!("read key: {}", key);
         let value = cfg.read(&key);
         if let Ok(value) = value {
             debug!("got value");
@@ -186,18 +687,11 @@ async fn handle_connection(stream: &mut TcpStream, pull_id: Rc<RefCell<u32>>, cf
             warn!("read error: no such key");
             write_i8(stream, Reply::Error as i8).await?;
         }
+        Ok(())
     }
-            Request::ConfigWrite => {
+
-                let key = read_key(stream).await?;
+    pub async fn config_write(stream: &mut TcpStream, cfg: &Rc<Config>, key: &String, value: Vec<u8>) -> Result<()> {
-                debug!("write key: {}", key);
+        let value = cfg.write(&key, value);
-                let len = read_i32(stream).await?;
-                let len = if len <= 0 { 0 } else { len as usize };
-                let mut buffer = Vec::with_capacity(len);
-                unsafe {
-                    buffer.set_len(len);
-                }
-                read_chunk(stream, &mut buffer).await?;
-                let value = cfg.write(&key, buffer);
         if value.is_ok() {
             debug!("write success");
             write_i8(stream, Reply::Success as i8).await?;
@@ -206,10 +700,10 @@ async fn handle_connection(stream: &mut TcpStream, pull_id: Rc<RefCell<u32>>, cf
             error!("failed to write: {:?}", value);
             write_i8(stream, Reply::Error as i8).await?;
         }
+        Ok(())
     }
-            Request::ConfigRemove => {
+
-                let key = read_key(stream).await?;
+    pub async fn config_remove(stream: &mut TcpStream, cfg: &Rc<Config>, key: &String) -> Result<()> {
-                debug!("erase key: {}", key);
         let value = cfg.remove(&key);
         if value.is_ok() {
             debug!("erase success");
@@ -218,18 +712,172 @@ async fn handle_connection(stream: &mut TcpStream, pull_id: Rc<RefCell<u32>>, cf
             warn!("erase failed");
             write_i8(stream, Reply::Error as i8).await?;
         }
+        Ok(())
     }
-            Request::Reboot => {
+
+    pub async fn config_erase(stream: &mut TcpStream) -> Result<()> {
+        error!("zynq device does not support config erase");
+        write_i8(stream, Reply::Error as i8).await?;
+        Ok(())
+    }
+
+    pub async fn reboot(stream: &mut TcpStream) -> Result<()> {
         info!("rebooting");
         write_i8(stream, Reply::RebootImminent as i8).await?;
         stream.flush().await?;
         slcr::reboot();
+
+        unreachable!()
     }
-        }
+
+    pub async fn debug_allocator(_stream: &mut TcpStream) -> Result<()> {
+        error!("zynq device does not support allocator debug print");
+        Ok(())
     }
 }
 
-pub fn start(cfg: Config) {
+#[cfg(has_drtio)]
+macro_rules! process {
+    ($stream: ident, $drtio_tuple:ident, $destination:expr, $func:ident $(, $param:expr)*) => {{
+        if $destination == 0 {
+            local_coremgmt::$func($stream, $($param, )*).await
+        } else if let Some((aux_mutex, routing_table, timer)) = $drtio_tuple {
+            let linkno = routing_table.0[$destination as usize][0] - 1 as u8;
+            remote_coremgmt::$func($stream, aux_mutex, routing_table, timer, linkno, $destination, $($param, )*).await
+        } else {
+            error!("coremgmt-over-drtio not supported for panicked device, please reboot");
+            write_i8($stream, Reply::Error as i8).await?;
+            Err(drtio::Error::LinkDown.into())
+        }
+    }}
+}
+
+#[cfg(not(has_drtio))]
+macro_rules! process {
+    ($stream: ident, $drtio_tuple:ident, $destination:expr, $func:ident $(, $param:expr)*) => {{
+        local_coremgmt::$func($stream, $($param, )*).await
+    }}
+}
+
+async fn handle_connection(
+    stream: &mut TcpStream,
+    pull_id: Rc<RefCell<u32>>,
+    cfg: Rc<Config>,
+    _drtio_tuple: Option<(&Rc<Mutex<bool>>, &RoutingTable, GlobalTimer)>,
+) -> Result<()> {
+    if !expect(&stream, b"ARTIQ management\n").await? {
+        return Err(Error::UnexpectedPattern);
+    }
+
+    let _destination: u8 = read_i8(stream).await? as u8;
+    stream.send_slice("e".as_bytes()).await?;
+
+    loop {
+        let msg = read_i8(stream).await;
+        if let Err(smoltcp::Error::Finished) = msg {
+            return Ok(());
+        }
+        let msg: Request = FromPrimitive::from_i8(msg?).ok_or(Error::UnrecognizedPacket)?;
+        match msg {
+            Request::GetLog => process!(stream, _drtio_tuple, _destination, get_log),
+            Request::ClearLog => process!(stream, _drtio_tuple, _destination, clear_log),
+            Request::PullLog => process!(
+                stream,
+                _drtio_tuple,
+                _destination,
+                pull_log,
+                &pull_id
+            ),
+            Request::SetLogFilter => {
+                let lvl = read_log_level_filter(stream).await?;
+                process!(
+                    stream,
+                    _drtio_tuple,
+                    _destination,
+                    set_log_filter,
+                    lvl
+                )
+            }
+            Request::SetUartLogFilter => {
+                let lvl = read_log_level_filter(stream).await?;
+                process!(
+                    stream,
+                    _drtio_tuple,
+                    _destination,
+                    set_uart_log_filter,
+                    lvl
+                )
+            }
+            Request::ConfigRead => {
+                let key = read_key(stream).await?;
+                process!(
+                    stream,
+                    _drtio_tuple,
+                    _destination,
+                    config_read,
+                    &cfg,
+                    &key
+                )
+            }
+            Request::ConfigWrite => {
+                let key = read_key(stream).await?;
+                let len = read_i32(stream).await?;
+                let len = if len <= 0 { 0 } else { len as usize };
+                let mut buffer = Vec::with_capacity(len);
+                unsafe {
+                    buffer.set_len(len);
+                }
+                read_chunk(stream, &mut buffer).await?;
+                process!(
+                    stream,
+                    _drtio_tuple,
+                    _destination,
+                    config_write,
+                    &cfg,
+                    &key,
+                    buffer
+                )
+            }
+            Request::ConfigRemove => {
+                let key = read_key(stream).await?;
+                process!(
+                    stream,
+                    _drtio_tuple,
+                    _destination,
+                    config_remove,
+                    &cfg,
+                    &key
+                )
+            }
+            Request::Reboot => {
+                process!(stream, _drtio_tuple, _destination, reboot)
+            }
+            Request::ConfigErase => {
+                process!(stream, _drtio_tuple, _destination, config_erase)
+            }
+            Request::DebugAllocator => {
+                process!(
+                    stream,
+                    _drtio_tuple,
+                    _destination,
+                    debug_allocator
+                )
+            }
+        }?;
+    }
+}
+
+pub fn start(
+    cfg: Config,
+    drtio_tuple: Option<(
+        &Rc<Mutex<bool>>,
+        &Rc<RefCell<drtio_routing::RoutingTable>>,
+        GlobalTimer,
+    )>,
+) {
+    let drtio_tuple = drtio_tuple.map(
+        |(aux_mutex, routing_table, timer)| (aux_mutex.clone(), routing_table.clone(), timer)
+    );
     task::spawn(async move {
         let pull_id = Rc::new(RefCell::new(0u32));
         let cfg = Rc::new(cfg);
@@ -237,9 +885,19 @@ pub fn start(cfg: Config) {
             let mut stream = TcpStream::accept(1380, 2048, 2048).await.unwrap();
             let pull_id = pull_id.clone();
             let cfg = cfg.clone();
+
+            let drtio_tuple = drtio_tuple.clone();
             task::spawn(async move {
                 info!("received connection");
-                let _ = handle_connection(&mut stream, pull_id, cfg)
+                // Avoid consuming the tuple
+                // Keep the borrowed value on stack
+                let drtio_tuple = drtio_tuple.as_ref().map(
+                    |(aux_mutex, routing_table, timer)| (aux_mutex, routing_table.borrow(), *timer)
+                );
+                let drtio_tuple = drtio_tuple.as_ref().map(
+                    |(aux_mutex, routing_table, timer)| (*aux_mutex, routing_table.deref(), *timer)
+                );
+                let _ = handle_connection(&mut stream, pull_id, cfg, drtio_tuple)
                     .await
                     .map_err(|e| warn!("connection terminated: {:?}", e));
                 let _ = stream.flush().await;

src/runtime/src/rtio_mgt.rs

@@ -540,7 +540,7 @@ pub mod drtio {
         }
     }
 
-    async fn partition_data<PacketF, HandlerF>(
+    pub async fn partition_data<PacketF, HandlerF>(
         linkno: u8,
         aux_mutex: &Rc<Mutex<bool>>,
         routing_table: &RoutingTable,