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firmware: send DRTIO routing table to satellite

This commit is contained in:
Sebastien Bourdeauducq 2018-09-11 14:12:41 +08:00
parent 3d29a7ed14
commit b38c57d73b
7 changed files with 87 additions and 41 deletions
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11
artiq/firmware/libboard_artiq/drtio_routing.rs
View File

@ -5,11 +5,11 @@ pub const DEST_COUNT: usize = 256;
pub const MAX_HOPS: usize = 32;
pub const INVALID_HOP: u8 = 0xff;
pub struct RoutingTable([[u8; MAX_HOPS]; DEST_COUNT]);
pub struct RoutingTable(pub [[u8; MAX_HOPS]; DEST_COUNT]);
impl RoutingTable {
// default routing table is for star topology with no hops
fn default_master(default_n_links: usize) -> RoutingTable {
pub fn default_master(default_n_links: usize) -> RoutingTable {
let mut ret = RoutingTable([[INVALID_HOP; MAX_HOPS]; DEST_COUNT]);
for i in 0..default_n_links {
ret.0[i][0] = i as u8;
@ -20,9 +20,9 @@ impl RoutingTable {
ret
}
// satellites receive the routing table from the master
// by default, block everything
fn default_satellite() -> RoutingTable {
// use this by default on satellite, as they receive
// the routing table from the master
pub fn default_empty() -> RoutingTable {
RoutingTable([[INVALID_HOP; MAX_HOPS]; DEST_COUNT])
}
}
@ -68,6 +68,7 @@ pub fn config_routing_table(default_n_links: usize) -> RoutingTable {
ret
}
#[cfg(has_drtio_routing)]
pub fn program_interconnect(rt: &RoutingTable, rank: u8)
{
for i in 0..DEST_COUNT {

1
artiq/firmware/libboard_artiq/lib.rs
View File

@ -48,5 +48,4 @@ pub mod grabber;
#[cfg(has_drtio)]
pub mod drtioaux;
#[cfg(has_drtio_routing)]
pub mod drtio_routing;

2
artiq/firmware/libproto_artiq/drtioaux_proto.rs
View File

@ -14,7 +14,7 @@ impl<T> From<IoError<T>> for Error<T> {
}
}
#[derive(Debug)]
#[derive(PartialEq, Debug)]
pub enum Packet {
EchoRequest,
EchoReply,

11
artiq/firmware/runtime/main.rs
View File

@ -25,6 +25,7 @@ extern crate board_artiq;
extern crate logger_artiq;
extern crate proto_artiq;
use core::cell::RefCell;
use core::convert::TryFrom;
use smoltcp::wire::{EthernetAddress, IpAddress, IpCidr};
@ -282,14 +283,16 @@ fn startup_ethernet() {
.finalize();
#[cfg(has_drtio_routing)]
let drtio_routing_table = drtio_routing::config_routing_table(csr::DRTIO.len());
#[cfg(has_drtio_routing)]
drtio_routing::program_interconnect(&drtio_routing_table, 0);
let drtio_routing_table = urc::Urc::new(RefCell::new(
drtio_routing::config_routing_table(csr::DRTIO.len())));
let mut scheduler = sched::Scheduler::new();
let io = scheduler.io();
rtio_mgt::startup(&io);
#[cfg(has_drtio_routing)]
rtio_mgt::startup(&io, &drtio_routing_table);
#[cfg(not(has_drtio_routing))]
rtio_mgt::startup(&io, &drtio_routing::RoutingTable::default_empty());
io.spawn(4096, mgmt::thread);
io.spawn(16384, session::thread);

90
artiq/firmware/runtime/rtio_mgt.rs
View File

@ -1,6 +1,9 @@
use board_misoc::csr;
use core::cell::RefCell;
use urc::Urc;
use board_misoc::{csr, clock};
#[cfg(has_rtio_clock_switch)]
use board_misoc::config;
use board_artiq::drtio_routing;
use sched::Io;
#[cfg(has_rtio_crg)]
@ -42,11 +45,15 @@ pub mod drtio {
use super::*;
use drtioaux;
pub fn startup(io: &Io) {
pub fn startup(io: &Io, routing_table: &Urc<RefCell<drtio_routing::RoutingTable>>) {
unsafe {
csr::drtio_transceiver::stable_clkin_write(1);
}
io.spawn(4096, link_thread);
let routing_table = routing_table.clone();
io.spawn(4096, move |io| {
let routing_table = routing_table.borrow();
link_thread(io, &routing_table)
});
}
fn link_rx_up(linkno: u8) -> bool {
@ -106,28 +113,51 @@ pub mod drtio {
}
}
fn sync_tsc(linkno: u8, io: &Io) -> Result<(), &'static str> {
fn recv_aux_timeout(io: &Io, linkno: u8, timeout: u32) -> Result<drtioaux::Packet, &'static str> {
let max_time = clock::get_ms() + timeout as u64;
loop {
if !link_rx_up(linkno) {
return Err("link went down");
}
if clock::get_ms() > max_time {
return Err("timeout");
}
match drtioaux::recv_link(linkno) {
Ok(Some(packet)) => return Ok(packet),
Ok(None) => (),
Err(_) => return Err("aux packet error")
}
io.relinquish().unwrap();
}
}
fn sync_tsc(io: &Io, linkno: u8) -> Result<(), &'static str> {
unsafe {
(csr::DRTIO[linkno as usize].set_time_write)(1);
while (csr::DRTIO[linkno as usize].set_time_read)() == 1 {}
}
// TSCAck is the only aux packet that is sent spontaneously
// by the satellite, in response to a TSC set on the RT link.
let reply = recv_aux_timeout(io, linkno, 10000)?;
if reply == drtioaux::Packet::TSCAck {
return Ok(());
} else {
return Err("unexpected reply");
}
}
loop {
let mut count = 0;
if !link_rx_up(linkno) {
return Err("link went down");
}
count += 1;
if count > 200 {
return Err("timeout");
}
io.sleep(100).unwrap();
// TSCAck is the only aux packet that is sent spontaneously
// by the satellite, in response to a TSC set on the RT link.
if let Ok(Some(drtioaux::Packet::TSCAck)) = drtioaux::recv_link(linkno) {
return Ok(())
fn load_routing_table(io: &Io, linkno: u8, routing_table: &drtio_routing::RoutingTable) -> Result<(), &'static str> {
for i in 0..drtio_routing::DEST_COUNT {
drtioaux::send_link(linkno, &drtioaux::Packet::RoutingSetPath {
destination: i as u8,
hops: routing_table.0[i]
}).unwrap();
let reply = recv_aux_timeout(io, linkno, 200)?;
if reply != drtioaux::Packet::RoutingAck {
return Err("unexpected reply");
}
}
Ok(())
}
fn process_local_errors(linkno: u8) {
@ -166,7 +196,7 @@ pub mod drtio {
}
}
pub fn link_thread(io: Io) {
pub fn link_thread(io: Io, routing_table: &drtio_routing::RoutingTable) {
loop {
for linkno in 0..csr::DRTIO.len() {
let linkno = linkno as u8;
@ -188,11 +218,13 @@ pub mod drtio {
info!("[LINK#{}] remote replied after {} packets", linkno, ping_count);
set_link_up(linkno, true);
init_buffer_space(linkno);
if sync_tsc(linkno, &io).is_err() {
error!("[LINK#{}] remote failed to ack TSC", linkno);
} else {
info!("[LINK#{}] link initialization completed", linkno);
if let Err(e) = sync_tsc(&io, linkno) {
error!("[LINK#{}] failed to sync TSC ({})", linkno, e);
}
if let Err(e) = load_routing_table(&io, linkno, routing_table) {
error!("[LINK#{}] failed to load routing table ({})", linkno, e);
}
info!("[LINK#{}] link initialization completed", linkno);
} else {
error!("[LINK#{}] ping failed", linkno);
}
@ -223,7 +255,7 @@ pub mod drtio {
pub mod drtio {
use super::*;
pub fn startup(_io: &Io) {}
pub fn startup(_io: &Io, _routing_table: &Urc<RefCell<drtio_routing::RoutingTable>>) {}
pub fn init() {}
pub fn link_up(_linkno: u8) -> bool { false }
}
@ -250,7 +282,7 @@ fn async_error_thread(io: Io) {
}
}
pub fn startup(io: &Io) {
pub fn startup(io: &Io, routing_table: &Urc<RefCell<drtio_routing::RoutingTable>>) {
#[cfg(has_rtio_crg)]
{
#[cfg(has_rtio_clock_switch)]
@ -290,7 +322,13 @@ pub fn startup(io: &Io) {
}
}
drtio::startup(io);
#[cfg(has_drtio_routing)]
{
let routing_table = routing_table.clone();
drtio_routing::program_interconnect(&routing_table.borrow(), 0);
}
drtio::startup(io, &routing_table);
init_core(true);
io.spawn(4096, async_error_thread);
}

9
artiq/firmware/satman/main.rs
View File

@ -96,6 +96,11 @@ fn process_aux_packet(packet: drtioaux::Packet) -> Result<(), drtioaux::Error<!>
}
}
drtioaux::Packet::RoutingSetPath { destination, hops } => {
info!("routing: {} -> {:?}", destination, hops);
drtioaux::send_link(0, &drtioaux::Packet::RoutingAck)
}
drtioaux::Packet::MonitorRequest { channel, probe } => {
let value;
#[cfg(has_rtio_moninj)]
@ -343,8 +348,8 @@ pub extern fn main() -> i32 {
}
}
for rep in repeaters.iter() {
if rep.sync_tsc().is_err() {
error!("remote failed to ack TSC");
if let Err(e) = rep.sync_tsc() {
error!("failed to sync TSC ({})", e);
}
}
if let Err(e) = drtioaux::send_link(0, &drtioaux::Packet::TSCAck) {

4
artiq/firmware/satman/repeater.rs
View File

@ -63,8 +63,8 @@ impl Repeater {
if rep_link_rx_up(self.repno) {
if let Ok(Some(drtioaux::Packet::EchoReply)) = drtioaux::recv_link(self.auxno) {
info!("[REP#{}] remote replied after {} packets", self.repno, ping_count);
if self.sync_tsc().is_err() {
error!("[REP#{}] remote failed to ack TSC", self.repno);
if let Err(e) = self.sync_tsc() {
error!("[REP#{}] failed to sync TSC ({})", self.repno, e);
self.state = RepeaterState::Failed;
return;
}