feat(drivers/net): add GEM driver

Co-authored-by: Martin Kröning <[email protected]>
Signed-off-by: Martin Kröning <[email protected]>

.github/workflows/ci.yml

@@ -27,7 +27,7 @@ jobs:
         with:
           save-if: ${{ github.ref == 'refs/heads/main' }}
       - name: Check each feature
-        run: cargo hack check --package hermit-kernel --each-feature --no-dev-deps --target x86_64-unknown-none
+        run: cargo hack check --package hermit-kernel --each-feature --skip gem-net --no-dev-deps --target x86_64-unknown-none
         env:
           RUSTFLAGS:
 

Cargo.toml

@@ -54,6 +54,7 @@ dhcpv4 = [
 ]
 fs = ["pci"]
 fsgsbase = []
+gem-net = ["tcp"]
 newlib = []
 pci = []
 rtl8139 = ["tcp", "pci"]

src/drivers/mod.rs

@@ -20,6 +20,8 @@ pub mod virtio;
 pub mod error {
 	use core::fmt;
 
+	#[cfg(feature = "gem-net")]
+	use crate::drivers::net::gem::GEMError;
 	#[cfg(feature = "rtl8139")]
 	use crate::drivers::net::rtl8139::RTL8139Error;
 	#[cfg(any(
@@ -37,6 +39,8 @@ pub mod error {
 		InitVirtioDevFail(VirtioError),
 		#[cfg(feature = "rtl8139")]
 		InitRTL8139DevFail(RTL8139Error),
+		#[cfg(feature = "gem-net")]
+		InitGEMDevFail(GEMError),
 	}
 
 	#[cfg(any(
@@ -56,6 +60,13 @@ pub mod error {
 		}
 	}
 
+	#[cfg(feature = "gem-net")]
+	impl From<GEMError> for DriverError {
+		fn from(err: GEMError) -> Self {
+			DriverError::InitGEMDevFail(err)
+		}
+	}
+
 	impl fmt::Display for DriverError {
 		#[allow(unused_variables)]
 		fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
@@ -71,6 +82,10 @@ pub mod error {
 				DriverError::InitRTL8139DevFail(ref err) => {
 					write!(f, "RTL8139 driver failed: {err:?}")
 				}
+				#[cfg(feature = "gem-net")]
+				DriverError::InitGEMDevFail(ref err) => {
+					write!(f, "GEM driver failed: {err:?}")
+				}
 			}
 		}
 	}