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zynq-rs
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eth: split into Eth and EthInner

This commit is contained in:
Astro 2019-09-29 02:58:17 +02:00
parent 0f6bc68d1f
commit a76214cb9d
2 changed files with 170 additions and 159 deletions
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315
src/eth/mod.rs
View File

@ -17,12 +17,10 @@ const MAX_MDC: u32 = 2_500_000;
const TX_1000: u32 = 125_000_000;
pub struct Eth<'r, RX, TX> {
regs: &'r mut regs::RegisterBlock,
rx: RX,
tx: TX,
link: bool,
// TODO: no Option
phy: Option<Phy>,
inner: EthInner<'r>,
phy: Phy,
}
impl<'r> Eth<'r, (), ()> {
@ -172,17 +170,21 @@ impl<'r> Eth<'r, (), ()> {
}
fn from_regs(regs: &'r mut regs::RegisterBlock, macaddr: [u8; 6]) -> Self {
let mut eth = Eth {
let mut inner = EthInner {
regs,
link: false,
};
inner.init();
inner.configure(macaddr);
let phy = Phy::find(&mut inner).expect("phy");
phy.reset(&mut inner);
phy.restart_autoneg(&mut inner);
let mut eth = Eth {
rx: (),
tx: (),
link: false,
phy: None,
inner,
phy,
};
eth.init();
eth.configure(macaddr);
eth.phy = Phy::find(&mut eth);
eth.reset_phy();
eth
}
}
@ -234,6 +236,145 @@ impl<'r, RX, TX> Eth<'r, RX, TX> {
});
}
pub fn start_rx<'rx>(self, rx_list: &'rx mut [rx::DescEntry], rx_buffers: &'rx mut [[u8; MTU]]) -> Eth<'r, rx::DescList<'rx>, TX> {
let new_self = Eth {
rx: rx::DescList::new(rx_list, rx_buffers),
tx: self.tx,
inner: self.inner,
phy: self.phy,
};
let list_addr = new_self.rx.list_addr();
assert!(list_addr & 0b11 == 0);
new_self.inner.regs.rx_qbar.write(
regs::RxQbar::zeroed()
.rx_q_baseaddr(list_addr >> 2)
);
new_self.inner.regs.net_ctrl.modify(|_, w|
w.rx_en(true)
);
new_self
}
pub fn start_tx<'tx>(self, tx_list: &'tx mut [tx::DescEntry], tx_buffers: &'tx mut [[u8; MTU]]) -> Eth<'r, RX, tx::DescList<'tx>> {
let new_self = Eth {
rx: self.rx,
tx: tx::DescList::new(tx_list, tx_buffers),
inner: self.inner,
phy: self.phy,
};
let list_addr = &new_self.tx.list_addr();
assert!(list_addr & 0b11 == 0);
new_self.inner.regs.tx_qbar.write(
regs::TxQbar::zeroed()
.tx_q_baseaddr(list_addr >> 2)
);
new_self.inner.regs.net_ctrl.modify(|_, w|
w.tx_en(true)
);
new_self
}
}
impl<'r, 'rx, TX> Eth<'r, rx::DescList<'rx>, TX> {
pub fn recv_next<'s: 'p, 'p>(&'s mut self) -> Result<Option<rx::PktRef<'p>>, rx::Error> {
let status = self.inner.regs.rx_status.read();
if status.hresp_not_ok() {
// Clear
self.inner.regs.rx_status.write(
regs::RxStatus::zeroed()
.hresp_not_ok(true)
);
return Err(rx::Error::HrespNotOk);
}
if status.rx_overrun() {
// Clear
self.inner.regs.rx_status.write(
regs::RxStatus::zeroed()
.rx_overrun(true)
);
return Err(rx::Error::RxOverrun);
}
if status.buffer_not_avail() {
// Clear
self.inner.regs.rx_status.write(
regs::RxStatus::zeroed()
.buffer_not_avail(true)
);
return Err(rx::Error::BufferNotAvail);
}
if status.frame_recd() {
let result = self.rx.recv_next();
match result {
Ok(None) => {
// No packet, clear status bit
self.inner.regs.rx_status.write(
regs::RxStatus::zeroed()
.frame_recd(true)
);
}
_ => {}
}
result
} else {
self.inner.check_link_change(&self.phy);
Ok(None)
}
}
}
impl<'r, 'tx, RX> Eth<'r, RX, tx::DescList<'tx>> {
pub fn send<'s: 'p, 'p>(&'s mut self, length: usize) -> Option<tx::PktRef<'p>> {
self.tx.send(self.inner.regs, length)
}
}
impl<'r, 'rx, 'tx: 'a, 'a> smoltcp::phy::Device<'a> for &mut Eth<'r, rx::DescList<'rx>, tx::DescList<'tx>> {
type RxToken = rx::PktRef<'a>;
type TxToken = tx::Token<'a, 'tx>;
fn capabilities(&self) -> smoltcp::phy::DeviceCapabilities {
let mut caps = smoltcp::phy::DeviceCapabilities::default();
caps.max_transmission_unit = MTU;
caps
}
fn receive(&'a mut self) -> Option<(Self::RxToken, Self::TxToken)> {
match self.rx.recv_next() {
Ok(Some(mut pktref)) => {
let tx_token = tx::Token {
regs: self.inner.regs,
desc_list: &mut self.tx,
};
Some((pktref, tx_token))
}
Ok(None) => {
self.inner.check_link_change(&self.phy);
None
}
Err(e) => {
println!("eth recv error: {:?}", e);
None
}
}
}
fn transmit(&'a mut self) -> Option<Self::TxToken> {
Some(tx::Token {
regs: self.inner.regs,
desc_list: &mut self.tx,
})
}
}
struct EthInner<'r> {
regs: &'r mut regs::RegisterBlock,
link: bool,
}
impl<'r> EthInner<'r> {
fn init(&mut self) {
// Clear the Network Control register.
self.regs.net_ctrl.write(regs::NetCtrl::zeroed());
@ -356,74 +497,21 @@ impl<'r, RX, TX> Eth<'r, RX, TX> {
);
}
pub fn start_rx<'rx>(self, rx_list: &'rx mut [rx::DescEntry], rx_buffers: &'rx mut [[u8; MTU]]) -> Eth<'r, rx::DescList<'rx>, TX> {
let new_self = Eth {
regs: self.regs,
rx: rx::DescList::new(rx_list, rx_buffers),
tx: self.tx,
link: self.link,
phy: self.phy,
};
let list_addr = new_self.rx.list_addr();
assert!(list_addr & 0b11 == 0);
new_self.regs.rx_qbar.write(
regs::RxQbar::zeroed()
.rx_q_baseaddr(list_addr >> 2)
);
new_self.regs.net_ctrl.modify(|_, w|
w.rx_en(true)
);
new_self
}
pub fn start_tx<'tx>(self, tx_list: &'tx mut [tx::DescEntry], tx_buffers: &'tx mut [[u8; MTU]]) -> Eth<'r, RX, tx::DescList<'tx>> {
let new_self = Eth {
regs: self.regs,
rx: self.rx,
tx: tx::DescList::new(tx_list, tx_buffers),
link: self.link,
phy: self.phy,
};
let list_addr = &new_self.tx.list_addr();
assert!(list_addr & 0b11 == 0);
new_self.regs.tx_qbar.write(
regs::TxQbar::zeroed()
.tx_q_baseaddr(list_addr >> 2)
);
new_self.regs.net_ctrl.modify(|_, w|
w.tx_en(true)
);
new_self
}
fn wait_phy_idle(&self) {
while !self.regs.net_status.read().phy_mgmt_idle() {}
}
pub fn reset_phy(&mut self) {
let phy = self.phy.clone().expect("phy");
println!("eth: Reset PHY at {}: {}", phy.addr, phy.name());
phy.modify_control(self, |control|
control.set_reset(true)
);
while phy.get_control(self).reset() {
println!("eth: Wait for PHY reset");
}
phy.modify_control(self, |control|
control.set_autoneg_enable(true)
.set_restart_autoneg(true)
);
}
fn check_link_change(&mut self) {
let phy = self.phy.clone().expect("phy");
fn check_link_change(&mut self, phy: &Phy) {
let link = phy.get_status(self).link_status();
// Check link state transition
match (self.link, link) {
(false, true) => {
println!("eth: got link, setting clock for gigabit");
Self::setup_gem0_clock(TX_1000);
// TODO: should derive gem0/gem107
Eth::<(), ()>::setup_gem0_clock(TX_1000);
}
(true, false) => {
println!("eth: link lost");
@ -439,61 +527,7 @@ impl<'r, RX, TX> Eth<'r, RX, TX> {
}
}
impl<'r, 'rx, TX> Eth<'r, rx::DescList<'rx>, TX> {
pub fn recv_next<'s: 'p, 'p>(&'s mut self) -> Result<Option<rx::PktRef<'p>>, rx::Error> {
let status = self.regs.rx_status.read();
if status.hresp_not_ok() {
// Clear
self.regs.rx_status.write(
regs::RxStatus::zeroed()
.hresp_not_ok(true)
);
return Err(rx::Error::HrespNotOk);
}
if status.rx_overrun() {
// Clear
self.regs.rx_status.write(
regs::RxStatus::zeroed()
.rx_overrun(true)
);
return Err(rx::Error::RxOverrun);
}
if status.buffer_not_avail() {
// Clear
self.regs.rx_status.write(
regs::RxStatus::zeroed()
.buffer_not_avail(true)
);
return Err(rx::Error::BufferNotAvail);
}
if status.frame_recd() {
let result = self.rx.recv_next();
match result {
Ok(None) => {
// No packet, clear status bit
self.regs.rx_status.write(
regs::RxStatus::zeroed()
.frame_recd(true)
);
}
_ => {}
}
result
} else {
self.check_link_change();
Ok(None)
}
}
}
impl<'r, 'tx, RX> Eth<'r, RX, tx::DescList<'tx>> {
pub fn send<'s: 'p, 'p>(&'s mut self, length: usize) -> Option<tx::PktRef<'p>> {
self.tx.send(self.regs, length)
}
}
impl<'r, RX, TX> PhyAccess for Eth<'r, RX, TX> {
impl<'r> PhyAccess for EthInner<'r> {
fn read_phy(&mut self, addr: u8, reg: u8) -> u16 {
self.wait_phy_idle();
self.regs.phy_maint.write(
@ -523,41 +557,4 @@ impl<'r, RX, TX> PhyAccess for Eth<'r, RX, TX> {
}
}
impl<'r, 'rx, 'tx: 'a, 'a> smoltcp::phy::Device<'a> for &mut Eth<'r, rx::DescList<'rx>, tx::DescList<'tx>> {
type RxToken = rx::PktRef<'a>;
type TxToken = tx::Token<'a, 'tx>;
fn capabilities(&self) -> smoltcp::phy::DeviceCapabilities {
let mut caps = smoltcp::phy::DeviceCapabilities::default();
caps.max_transmission_unit = MTU;
caps
}
fn receive(&'a mut self) -> Option<(Self::RxToken, Self::TxToken)> {
match self.rx.recv_next() {
Ok(Some(mut pktref)) => {
let tx_token = tx::Token {
regs: self.regs,
desc_list: &mut self.tx,
};
Some((pktref, tx_token))
}
Ok(None) => {
// TODO: self.check_link_change();
None
}
Err(e) => {
println!("eth recv error: {:?}", e);
None
}
}
}
fn transmit(&'a mut self) -> Option<Self::TxToken> {
Some(tx::Token {
regs: self.regs,
desc_list: &mut self.tx,
})
}
}

14
src/eth/phy/mod.rs
View File

@ -93,6 +93,20 @@ impl Phy {
pub fn get_status<PA: PhyAccess>(&self, pa: &mut PA) -> Status {
self.read_reg(pa)
}
pub fn reset<PA: PhyAccess>(&self, pa: &mut PA) {
self.modify_control(pa, |control|
control.set_reset(true)
);
while self.get_control(pa).reset() {}
}
pub fn restart_autoneg<PA: PhyAccess>(&self, pa: &mut PA) {
self.modify_control(pa, |control|
control.set_autoneg_enable(true)
.set_restart_autoneg(true)
);
}
}
pub trait PhyRegister {