add support of TCP segmentation offloading

Cargo.toml

@@ -105,18 +105,15 @@ features = [
     "proto-ipv6",
     "socket-tcp",
     "socket-udp",
-    # Enable IP fragmentation
-    #"proto-ipv4-fragmentation",
-    #
-    # Assume a MTU size of 9000
-    #"fragmentation-buffer-size-8192",
-    #"reassembly-buffer-size-8192",
     #
     # Enable for increased output
-    # "log",
-    # "verbose",
+    "log",
+    "verbose",
 ]
 
+[patch.crates-io]
+smoltcp= { git = "https://github.com/hermitcore/smoltcp.git", branch = "tso" }
+
 [target.'cfg(target_arch = "x86_64")'.dependencies]
 multiboot = "0.8"
 uart_16550 = "0.3"

src/drivers/net/mod.rs

@@ -7,7 +7,7 @@ pub mod virtio_net;
 #[cfg(all(feature = "pci", not(feature = "rtl8139")))]
 pub mod virtio_pci;
 
-use smoltcp::phy::ChecksumCapabilities;
+use smoltcp::phy::{ChecksumCapabilities, TsoCapabilities};
 
 #[cfg(target_arch = "x86_64")]
 use crate::arch::kernel::apic;
@@ -25,10 +25,14 @@ use crate::executor::device::{RxToken, TxToken};
 
 /// A trait for accessing the network interface
 pub(crate) trait NetworkDriver {
-	/// Returns smoltcp's checksum capabilities
-	fn get_checksums(&self) -> ChecksumCapabilities {
+	/// A description of checksum behavior for every supported protocol.
+	fn get_checksum(&self) -> ChecksumCapabilities {
 		ChecksumCapabilities::default()
 	}
+	/// Specifies if the device support TCP segmentation offloading (TSO)
+	fn get_tso(&self) -> TsoCapabilities {
+		TsoCapabilities::None
+	}
 	/// Returns the mac address of the device.
 	fn get_mac_address(&self) -> [u8; 6];
 	/// Returns the current MTU of the device.

src/drivers/net/virtio_mmio.rs

@@ -10,7 +10,7 @@ use core::ptr::read_volatile;
 use core::str::FromStr;
 use core::sync::atomic::{fence, Ordering};
 
-use smoltcp::phy::ChecksumCapabilities;
+use smoltcp::phy::{Checksum, ChecksumCapabilities, TsoCapabilities};
 
 use crate::drivers::net::virtio_net::constants::{FeatureSet, Status};
 use crate::drivers::net::virtio_net::{CtrlQueue, NetDevCfg, RxQueues, TxQueues, VirtioNetDriver};
@@ -152,6 +152,7 @@ impl VirtioNetDriver {
 			irq,
 			mtu,
 			checksums: ChecksumCapabilities::default(),
+			tso: TsoCapabilities::default(),
 		})
 	}