main: setup smoltcp

still panics, leading to a DataAbort

Cargo.toml

@@ -22,3 +22,4 @@ r0 = "0.2"
 volatile-register = "0.2"
 bit_field = "0.10"
 compiler_builtins = { git = "https://github.com/rust-lang-nursery/compiler-builtins", no-default-features = true, features = ["mem", "no-lang-items"]}
+smoltcp = { version = "0.5", default-features = false, features = ["proto-ipv4", "socket-tcp"] }

src/eth/mod.rs

@@ -11,13 +11,13 @@ pub mod tx;
 pub const MTU: usize = 1536;
 pub const IO_PLL: u32 = 1_000;
 
-pub struct Eth<RX, TX> {
-    regs: &'static mut regs::RegisterBlock,
+pub struct Eth<'r, RX, TX> {
+    regs: &'r mut regs::RegisterBlock,
     rx: RX,
     tx: TX,
 }
 
-impl Eth<(), ()> {
+impl<'r> Eth<'r, (), ()> {
     pub fn default(macaddr: [u8; 6]) -> Self {
         slcr::RegisterBlock::unlocked(|slcr| {
             // Manual example: 0x0000_1280
@@ -163,7 +163,7 @@ impl Eth<(), ()> {
         Self::from_regs(regs, macaddr)
     }
 
-    fn from_regs(regs: &'static mut regs::RegisterBlock, macaddr: [u8; 6]) -> Self {
+    fn from_regs(regs: &'r mut regs::RegisterBlock, macaddr: [u8; 6]) -> Self {
         let mut eth = Eth {
             regs,
             rx: (),
@@ -174,7 +174,7 @@ impl Eth<(), ()> {
     }
 }
 
-impl<RX, TX> Eth<RX, TX> {
+impl<'r, RX, TX> Eth<'r, RX, TX> {
     pub fn setup_gem0_clock(tx_clock: u32) {
         let d0 = (IO_PLL / tx_clock).min(63);
         let d1 = (IO_PLL / tx_clock / d0).min(63);
@@ -341,7 +341,7 @@ impl<RX, TX> Eth<RX, TX> {
         );
     }
 
-    pub fn start_rx<'rx>(self, rx_list: &'rx mut [rx::DescEntry], rx_buffers: &'rx mut [[u8; MTU]]) -> Eth<rx::DescList<'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),
@@ -359,7 +359,7 @@ impl<RX, TX> Eth<RX, TX> {
         new_self
     }
 
-    pub fn start_tx<'tx>(self, tx_list: &'tx mut [tx::DescEntry], tx_buffers: &'tx mut [[u8; MTU]]) -> Eth<RX, tx::DescList<'tx>> {
+    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,
@@ -404,7 +404,7 @@ impl<RX, TX> Eth<RX, TX> {
     }
 }
 
-impl<'rx, TX> Eth<rx::DescList<'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() {
@@ -451,13 +451,13 @@ impl<'rx, TX> Eth<rx::DescList<'rx>, TX> {
     }
 }
 
-impl<'tx, RX> Eth<RX, tx::DescList<'tx>> {
+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(&mut self.regs, length)
+        self.tx.send(self.regs, length)
     }
 }
 
-impl<RX, TX> phy::PhyAccess for Eth<RX, TX> {
+impl<'r, RX, TX> phy::PhyAccess for Eth<'r, RX, TX> {
     fn read_phy(&mut self, addr: u8, reg: u8) -> u16 {
         self.wait_phy_idle();
         self.regs.phy_maint.write(
@@ -486,3 +486,40 @@ impl<RX, TX> phy::PhyAccess for Eth<RX, TX> {
         self.wait_phy_idle();
     }
 }
+
+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) =>
+                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,
+        })
+    }
+
+}

src/eth/rx.rs

@@ -120,3 +120,12 @@ impl<'a> Deref for PktRef<'a> {
         self.buffer
     }
 }
+
+impl<'a> smoltcp::phy::RxToken for PktRef<'a> {
+    fn consume<R, F>(mut self, _timestamp: smoltcp::time::Instant, f: F) -> smoltcp::Result<R>
+    where
+        F: FnOnce(&[u8]) -> smoltcp::Result<R>
+    {
+        f(self.buffer)
+    }
+}

src/eth/tx.rs

@@ -66,7 +66,7 @@ impl<'a> DescList<'a> {
         &self.list[0] as *const _ as u32
     }
 
-    pub fn send<'s: 'p, 'p>(&'s mut self, regs: &'p mut regs::RegisterBlock, length: usize) -> Option<PktRef<'p>> {
+    pub fn send<'s: 'p, 'p>(&'s mut self, regs: &'s mut regs::RegisterBlock, length: usize) -> Option<PktRef<'p>> {
         let list_len = self.list.len();
         let entry = &mut self.list[self.next];
         if entry.word1.read().used() {
@@ -118,3 +118,26 @@ impl<'a> DerefMut for PktRef<'a> {
         self.buffer
     }
 }
+
+/// TxToken for smoltcp support
+pub struct Token<'a, 'tx: 'a> {
+    pub regs: &'a mut regs::RegisterBlock,
+    pub desc_list: &'a mut DescList<'tx>,
+}
+
+impl<'a, 'tx: 'a> smoltcp::phy::TxToken for Token<'a, 'tx> {
+    fn consume<R, F>(self, _timestamp: smoltcp::time::Instant, len: usize, f: F) -> smoltcp::Result<R>
+        where F: FnOnce(&mut [u8]) -> smoltcp::Result<R>
+    {
+        match self.desc_list.send(self.regs, len) {
+            None =>
+                Err(smoltcp::Error::Exhausted),
+            Some(mut pktref) => {
+                let result = f(pktref.deref_mut());
+                // TODO: on result.is_err() don;t send
+                drop(pktref);
+                result
+            }
+        }
+    }
+}

src/main.rs

@@ -6,10 +6,13 @@
 #![feature(compiler_builtins_lib)]
 #![feature(never_type)]
 
-use core::mem::uninitialized;
-
+use core::mem::{uninitialized, transmute};
 use r0::zero_bss;
 use compiler_builtins as _;
+use smoltcp::wire::{EthernetAddress, IpAddress, IpCidr};
+use smoltcp::iface::{NeighborCache, EthernetInterfaceBuilder, EthernetInterface};
+use smoltcp::time::Instant;
+use smoltcp::socket::SocketSet;
 
 mod regs;
 mod cortex_a9;
@@ -70,46 +73,80 @@ fn l1_cache_init() {
     dccisw();
 }
 
+const HWADDR: [u8; 6] = [0, 0x23, 0xde, 0xea, 0xbe, 0xef];
+
 fn main() {
     println!("Main.");
 
-    let mut eth = eth::Eth::default([0x0, 0x17, 0xde, 0xea, 0xbe, 0xef]);
+    let mut eth = eth::Eth::default(HWADDR.clone());
     println!("Eth on");
     eth.reset_phy();
 
-    let mut rx_descs: [eth::rx::DescEntry; 8] = unsafe { uninitialized() };
-    let mut rx_buffers = [[0u8; 1536]; 8];
-    let mut eth = eth.start_rx(&mut rx_descs, &mut rx_buffers);
-    let mut tx_descs: [eth::tx::DescEntry; 8] = unsafe { uninitialized() };
-    let mut tx_buffers = [[0u8; 1536]; 8];
-    let mut eth = eth.start_tx(&mut tx_descs, &mut tx_buffers);
+    let mut rx_descs: [eth::rx::DescEntry; 2] = unsafe { uninitialized() };
+    let mut rx_buffers = [[0u8; 1536]; 2];
+    let eth = eth.start_rx(&mut rx_descs, &mut rx_buffers);
+    let mut tx_descs: [eth::tx::DescEntry; 2] = unsafe { uninitialized() };
+    let mut tx_buffers = [[0u8; 1536]; 2];
+    let mut eth = eth.start_tx(
+        // HACK
+        unsafe { transmute(tx_descs.as_mut()) },
+        unsafe { transmute(tx_buffers.as_mut()) },
+    );
 
+    let ethernet_addr = EthernetAddress(HWADDR);
+    // IP stack
+    let local_addr = IpAddress::v4(10, 0, 0, 1);
+    let mut ip_addrs = [IpCidr::new(local_addr, 24)];
+    let mut neighbor_storage = [None; 16];
+    let neighbor_cache = NeighborCache::new(&mut neighbor_storage[..]);
+    let mut iface = EthernetInterfaceBuilder::new(&mut eth)
+        .ethernet_addr(ethernet_addr)
+        .ip_addrs(&mut ip_addrs[..])
+        .neighbor_cache(neighbor_cache)
+        .finalize();
+    let mut sockets_storage = [
+        None, None, None, None,
+        None, None, None, None
+    ];
+    let mut sockets = SocketSet::new(&mut sockets_storage[..]);
+
+    let mut time = 0u32;
     loop {
-        match eth.recv_next() {
-            Ok(Some(pkt)) => {
-                print!("eth: rx {} bytes", pkt.len());
-                for b in pkt.iter() {
-                    print!(" {:02X}", b);
-                }
-                println!("");
-            }
-            Ok(None) => {}
+        time += 1;
+        let timestamp = Instant::from_millis(time.into());
+
+        match iface.poll(&mut sockets, timestamp) {
+            Ok(_) => {},
             Err(e) => {
-                println!("eth rx error: {:?}", e);
+                println!("poll error: {}", e);
             }
         }
 
-        match eth.send(512) {
-            Some(mut pkt) => {
-                let mut x = 0;
-                for b in pkt.iter_mut() {
-                    *b = x;
-                    x += 1;
-                }
-                println!("eth tx {} bytes", pkt.len());
-            }
-            None => println!("eth tx shortage"),
-        }
+        // match eth.recv_next() {
+        //     Ok(Some(pkt)) => {
+        //         print!("eth: rx {} bytes", pkt.len());
+        //         for b in pkt.iter() {
+        //             print!(" {:02X}", b);
+        //         }
+        //         println!("");
+        //     }
+        //     Ok(None) => {}
+        //     Err(e) => {
+        //         println!("eth rx error: {:?}", e);
+        //     }
+        // }
+
+        // match eth.send(512) {
+        //     Some(mut pkt) => {
+        //         let mut x = 0;
+        //         for b in pkt.iter_mut() {
+        //             *b = x;
+        //             x += 1;
+        //         }
+        //         println!("eth tx {} bytes", pkt.len());
+        //     }
+        //     None => println!("eth tx shortage"),
+        // }
     }
     panic!("End");
 }