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artiq
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runtime: centralize (D)RTIO management

pull/668/head
Sebastien Bourdeauducq 2016-12-09 19:24:00 +08:00
parent 0a9f69a3ed
commit 09fb4869f3
5 changed files with 168 additions and 152 deletions
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70
artiq/runtime.rs/src/drtio.rs
View File

@ -1,70 +0,0 @@
use board::csr;
use sched::{Waiter, Spawner};
fn drtio_link_is_up() -> bool {
unsafe {
csr::drtio::link_status_read() == 1
}
}
fn drtio_sync_tsc() {
unsafe {
csr::drtio::set_time_write(1);
while csr::drtio::set_time_read() == 1 {}
}
}
fn drtio_init_channel(channel: u16) {
unsafe {
csr::drtio::chan_sel_override_write(channel);
csr::drtio::chan_sel_override_en_write(1);
csr::drtio::o_reset_channel_status_write(1);
csr::drtio::o_get_fifo_space_write(1);
while csr::drtio::o_wait_read() == 1 {}
info!("FIFO space on channel {} is {}", channel, csr::drtio::o_dbg_fifo_space_read());
csr::drtio::chan_sel_override_en_write(0);
}
}
pub fn link_thread(waiter: Waiter, _spawner: Spawner) {
loop {
waiter.until(drtio_link_is_up).unwrap();
info!("link RX is up");
waiter.sleep(600).unwrap();
info!("wait for remote side done");
drtio_sync_tsc();
info!("TSC synced");
for channel in 0..16 {
drtio_init_channel(channel);
}
info!("link initialization completed");
waiter.until(|| !drtio_link_is_up()).unwrap();
info!("link is down");
}
}
fn drtio_packet_error_present() -> bool {
unsafe {
csr::drtio::packet_err_present_read() != 0
}
}
fn drtio_get_packet_error() -> u8 {
unsafe {
let err = csr::drtio::packet_err_code_read();
csr::drtio::packet_err_present_write(1);
err
}
}
pub fn error_thread(waiter: Waiter, _spawner: Spawner) {
loop {
waiter.until(drtio_packet_error_present).unwrap();
error!("DRTIO packet error {}", drtio_get_packet_error());
}
}

11
artiq/runtime.rs/src/lib.rs
View File

@ -58,7 +58,7 @@ extern fn panic_fmt(args: self::core::fmt::Arguments, file: &'static str, line:
mod board;
mod config;
mod clock;
mod rtio_crg;
mod rtio_mgt;
mod mailbox;
mod rpc_queue;
@ -80,8 +80,6 @@ mod session;
mod moninj;
#[cfg(has_rtio_analyzer)]
mod analyzer;
#[cfg(has_drtio)]
mod drtio;
extern {
fn network_init();
@ -120,20 +118,15 @@ pub unsafe extern fn rust_main() {
}
info!("continuing boot");
rtio_crg::init();
network_init();
let mut scheduler = sched::Scheduler::new();
rtio_mgt::startup(&scheduler);
scheduler.spawner().spawn(16384, session::thread);
#[cfg(has_rtio_moninj)]
scheduler.spawner().spawn(4096, moninj::thread);
#[cfg(has_rtio_analyzer)]
scheduler.spawner().spawn(4096, analyzer::thread);
#[cfg(has_drtio)]
{
scheduler.spawner().spawn(4096, drtio::link_thread);
scheduler.spawner().spawn(4096, drtio::error_thread);
}
loop {
scheduler.run();

65
artiq/runtime.rs/src/rtio_crg.rs
View File

@ -1,65 +0,0 @@
use config;
#[cfg(has_rtio_crg)]
mod imp {
use board::csr;
use clock;
pub fn init() {
unsafe { csr::rtio_crg::pll_reset_write(0) }
}
pub fn check() -> bool {
unsafe { csr::rtio_crg::pll_locked_read() != 0 }
}
pub fn switch_clock(clk: u8) -> bool {
unsafe {
let cur_clk = csr::rtio_crg::clock_sel_read();
if clk != cur_clk {
csr::rtio_crg::pll_reset_write(1);
csr::rtio_crg::clock_sel_write(clk);
csr::rtio_crg::pll_reset_write(0);
}
}
clock::spin_us(150);
return check()
}
}
#[cfg(not(has_rtio_crg))]
mod imp {
pub fn init() {}
pub fn check() -> bool { true }
pub fn switch_clock(clk: u8) -> bool { true }
}
pub fn init() {
imp::init();
let mut opt = [b'i'];
let clk;
match config::read("startup_clock", &mut opt) {
Ok(0) | Ok(1) if &opt == b"i" => {
info!("startup RTIO clock: internal");
clk = 0
}
Ok(1) if &opt == b"e" => {
info!("startup RTIO clock: external");
clk = 1
}
_ => {
error!("unrecognized startup_clock configuration entry");
clk = 0
}
};
if !switch_clock(clk) {
error!("startup RTIO clock failed");
warn!("this may cause the system initialization to fail");
warn!("fix clocking and reset the device");
}
}
pub use self::imp::{check, switch_clock};

161
artiq/runtime.rs/src/rtio_mgt.rs Normal file
View File

@ -0,0 +1,161 @@
use config;
use board::csr;
use sched::Scheduler;
#[cfg(has_rtio_crg)]
pub mod crg {
use clock;
use board::csr;
pub fn init() {
unsafe { csr::rtio_crg::pll_reset_write(0) }
}
pub fn check() -> bool {
unsafe { csr::rtio_crg::pll_locked_read() != 0 }
}
pub fn switch_clock(clk: u8) -> bool {
unsafe {
let cur_clk = csr::rtio_crg::clock_sel_read();
if clk != cur_clk {
csr::rtio_crg::pll_reset_write(1);
csr::rtio_crg::clock_sel_write(clk);
csr::rtio_crg::pll_reset_write(0);
}
}
clock::spin_us(150);
return check()
}
}
#[cfg(not(has_rtio_crg))]
pub mod crg {
pub fn init() {}
pub fn check() -> bool { true }
pub fn switch_clock(_clk: u8) -> bool { true }
}
#[cfg(has_drtio)]
mod drtio {
use board::csr;
use sched::{Scheduler, Waiter, Spawner};
pub fn init(scheduler: &Scheduler) {
scheduler.spawner().spawn(4096, link_thread);
scheduler.spawner().spawn(4096, error_thread);
}
fn link_is_up() -> bool {
unsafe {
csr::drtio::link_status_read() == 1
}
}
fn sync_tsc() {
unsafe {
csr::drtio::set_time_write(1);
while csr::drtio::set_time_read() == 1 {}
}
}
fn init_channel(channel: u16) {
unsafe {
csr::drtio::chan_sel_override_write(channel);
csr::drtio::chan_sel_override_en_write(1);
csr::drtio::o_reset_channel_status_write(1);
csr::drtio::o_get_fifo_space_write(1);
while csr::drtio::o_wait_read() == 1 {}
info!("FIFO space on channel {} is {}", channel, csr::drtio::o_dbg_fifo_space_read());
csr::drtio::chan_sel_override_en_write(0);
}
}
pub fn link_thread(waiter: Waiter, _spawner: Spawner) {
loop {
waiter.until(link_is_up).unwrap();
info!("link RX is up");
waiter.sleep(600).unwrap();
info!("wait for remote side done");
sync_tsc();
info!("TSC synced");
for channel in 0..16 {
init_channel(channel);
}
info!("link initialization completed");
waiter.until(|| !link_is_up()).unwrap();
info!("link is down");
}
}
fn packet_error_present() -> bool {
unsafe {
csr::drtio::packet_err_present_read() != 0
}
}
fn get_packet_error() -> u8 {
unsafe {
let err = csr::drtio::packet_err_code_read();
csr::drtio::packet_err_present_write(1);
err
}
}
pub fn error_thread(waiter: Waiter, _spawner: Spawner) {
loop {
waiter.until(packet_error_present).unwrap();
error!("DRTIO packet error {}", get_packet_error());
}
}
}
#[cfg(not(has_drtio))]
mod drtio {
use sched::Scheduler;
pub fn init(_scheduler: &Scheduler) {}
}
pub fn startup(scheduler: &Scheduler) {
crg::init();
let mut opt = [b'i'];
let clk;
match config::read("startup_clock", &mut opt) {
Ok(0) | Ok(1) if &opt == b"i" => {
info!("startup RTIO clock: internal");
clk = 0
}
Ok(1) if &opt == b"e" => {
info!("startup RTIO clock: external");
clk = 1
}
_ => {
error!("unrecognized startup_clock configuration entry");
clk = 0
}
};
if !crg::switch_clock(clk) {
error!("startup RTIO clock failed");
warn!("this may cause the system initialization to fail");
warn!("fix clocking and reset the device");
}
drtio::init(scheduler);
init_core()
}
pub fn init_core() {
unsafe {
csr::rtio_core::reset_write(1);
}
}

13
artiq/runtime.rs/src/session.rs
View File

@ -3,8 +3,7 @@ use std::{mem, str};
use std::cell::RefCell;
use std::io::{self, Read, Write, BufWriter};
use std::btree_set::BTreeSet;
use {config, rtio_crg, clock, mailbox, rpc_queue, kernel};
use board::csr; // TODO: centralize (D)RTIO management
use {config, rtio_mgt, clock, mailbox, rpc_queue, kernel};
use logger::BufferLogger;
use cache::Cache;
use urc::Urc;
@ -249,7 +248,7 @@ fn process_host_message(waiter: Waiter,
unexpected!("attempted to switch RTIO clock while a kernel was running")
}
if rtio_crg::switch_clock(clk) {
if rtio_mgt::crg::switch_clock(clk) {
host_write(stream, host::Reply::ClockSwitchCompleted)
} else {
host_write(stream, host::Reply::ClockSwitchFailed)
@ -380,9 +379,7 @@ fn process_kern_message(waiter: Waiter,
&kern::RTIOInitRequest => {
info!("resetting RTIO");
unsafe {
csr::rtio_core::reset_write(1);
}
rtio_mgt::init_core();
kern_acknowledge()
}
@ -514,7 +511,7 @@ fn host_kernel_worker(waiter: Waiter,
return Err(io_error("watchdog expired"))
}
if !rtio_crg::check() {
if !rtio_mgt::crg::check() {
try!(host_write(stream, host::Reply::ClockFailure));
return Err(io_error("RTIO clock failure"))
}
@ -552,7 +549,7 @@ fn flash_kernel_worker(waiter: Waiter,
return Err(io_error("watchdog expired"))
}
if !rtio_crg::check() {
if !rtio_mgt::crg::check() {
return Err(io_error("RTIO clock failure"))
}