Kernel: T6847: add Intel I40E out-of-tree Kernel driver with custom patches

The current version of the Intel i40e driver does not compile with a recent
LTS Kernel due to missing internal Kernel API adjustments in the Intel driver.

This commit contains custom patches to make the driver build.

9 files changed, 220 insertions, 10 deletions

diff --git a/scripts/package-build/linux-kernel/build-intel-nic.sh b/scripts/package-build/linux-kernel/build-intel-nic.sh
index da391a22..2289659f 100755
--- a/scripts/package-build/linux-kernel/build-intel-nic.sh
+++ b/scripts/package-build/linux-kernel/build-intel-nic.sh
@@ -46,7 +46,7 @@ if [ -d $PATCH_DIR ]; then
 fi
 
 echo "I: Compile Kernel module for Intel ${DRIVER_NAME} driver"
-make KSRC=${KERNEL_DIR} INSTALL_MOD_PATH=${DEBIAN_DIR} INSTALL_FW_PATH=${DEBIAN_DIR} -j $(getconf _NPROCESSORS_ONLN) -C src install
+make KSRC=${KERNEL_DIR} BUILD_KERNEL=${KERNEL_VERSION}${KERNEL_SUFFIX} INSTALL_MOD_PATH=${DEBIAN_DIR} INSTALL_FW_PATH=${DEBIAN_DIR} -j $(getconf _NPROCESSORS_ONLN) -C src install
 
 if [ "x$?" != "x0" ]; then
     exit 1
diff --git a/scripts/package-build/linux-kernel/build.py b/scripts/package-build/linux-kernel/build.py
index 605a2194..2b4927eb 100755
--- a/scripts/package-build/linux-kernel/build.py
+++ b/scripts/package-build/linux-kernel/build.py
@@ -144,11 +144,8 @@ def build_package(package: dict, dependencies: list) -> None:
             create_tarball(f'{package["name"]}-{package["commit_id"]}', f'{package["name"]}')
         elif package['build_cmd'] == 'build_intel_qat':
             build_intel_qat()
-        elif package['build_cmd'] == 'build_intel_igb':
-            build_intel(package['name'], package['commit_id'], package['scm_url'])
-        elif package['build_cmd'] == 'build_intel_ixgbe':
-            build_intel(package['name'], package['commit_id'], package['scm_url'])
-        elif package['build_cmd'] == 'build_intel_ixgbevf':
+        elif package['build_cmd'] in ['build_intel_igb', 'build_intel_ixgbe', 'build_intel_ixgbevf',
+                                      'build_intel_i40e']:
             build_intel(package['name'], package['commit_id'], package['scm_url'])
         elif package['build_cmd'] == 'build_mellanox_ofed':
             build_mellanox_ofed()
diff --git a/scripts/package-build/linux-kernel/config/arm64/vyos_defconfig b/scripts/package-build/linux-kernel/config/arm64/vyos_defconfig
index 3afde45c..7f7d1d58 100644
--- a/scripts/package-build/linux-kernel/config/arm64/vyos_defconfig
+++ b/scripts/package-build/linux-kernel/config/arm64/vyos_defconfig
@@ -1832,8 +1832,7 @@ CONFIG_IGB_HWMON=y
 CONFIG_IGBVF=m
 # CONFIG_IXGBE is not set
 # CONFIG_IXGBEVF is not set
-CONFIG_I40E=m
-# CONFIG_I40E_DCB is not set
+# CONFIG_I40E is not set
 CONFIG_IAVF=m
 CONFIG_I40EVF=m
 CONFIG_ICE=m
diff --git a/scripts/package-build/linux-kernel/config/x86/vyos_defconfig b/scripts/package-build/linux-kernel/config/x86/vyos_defconfig
index 7631bf28..0b9cbb24 100644
--- a/scripts/package-build/linux-kernel/config/x86/vyos_defconfig
+++ b/scripts/package-build/linux-kernel/config/x86/vyos_defconfig
@@ -1717,8 +1717,7 @@ CONFIG_IGB_DCA=y
 CONFIG_IGBVF=m
 # CONFIG_IXGBE is not set
 # CONFIG_IXGBEVF is not set
-CONFIG_I40E=m
-# CONFIG_I40E_DCB is not set
+# CONFIG_I40E is not set
 CONFIG_IAVF=m
 CONFIG_I40EVF=m
 CONFIG_ICE=m
diff --git a/scripts/package-build/linux-kernel/package.toml b/scripts/package-build/linux-kernel/package.toml
index ffed8b39..834f97c2 100644
--- a/scripts/package-build/linux-kernel/package.toml
+++ b/scripts/package-build/linux-kernel/package.toml
@@ -53,6 +53,12 @@ scm_url = "http://github.com/intel/ethernet-linux-ixgbevf"
 build_cmd = "build_intel_ixgbevf"
 
 [[packages]]
+name = "i40e"
+commit_id = "v2.28.16"
+scm_url = "http://github.com/intel/ethernet-linux-i40e"
+build_cmd = "build_intel_i40e"
+
+[[packages]]
 name = "jool"
 commit_id = ""
 scm_url = ""
diff --git a/scripts/package-build/linux-kernel/patches/i40e/0001-kcompat-have-auxiliary-device-id-when-mod-devicetable-has-it.patch b/scripts/package-build/linux-kernel/patches/i40e/0001-kcompat-have-auxiliary-device-id-when-mod-devicetable-has-it.patch
new file mode 100644
index 00000000..3326dd79
--- /dev/null
+++ b/scripts/package-build/linux-kernel/patches/i40e/0001-kcompat-have-auxiliary-device-id-when-mod-devicetable-has-it.patch
@@ -0,0 +1,23 @@
+From: Christian Breunig <christian@breunig.cc>
+Date: Sun, 3 May 2026 20:18:00 +0000
+Subject: [PATCH 1/3] kcompat: HAVE_AUXILIARY_DEVICE_ID when mod_devicetable has it
+
+---
+ src/kcompat-generator.sh |    5 +++--
+ 1 file changed, 3 insertions(+), 2 deletions(-)
+
+--- a/src/kcompat-generator.sh
++++ b/src/kcompat-generator.sh
+@@ -58,9 +58,10 @@ function gen-aux() {
+ 	fi
+ 	gen HAVE_AUXILIARY_DRIVER_INT_REMOVE if string "$HAVE_AUX_INT_REMOVE" equals 1
+ 
+-	# generate HAVE_AUXILIARY_DEVICE_ID only for cases when it's disabled in .config
++	# Whenever mod_devicetable.h defines struct auxiliary_device_id, vendor
++	# auxiliary_bus.h must not redefine it (true for CONFIG_AUXILIARY_BUS=y as well).
+ 	HAVE_AUX_DEV_ID=0
+-	if ! config_has CONFIG_AUXILIARY_BUS && check struct auxiliary_device_id in "$mh" ; then
++	if check struct auxiliary_device_id in "$mh" ; then
+ 		HAVE_AUX_DEV_ID=1
+ 	fi
+ 	gen HAVE_AUXILIARY_DEVICE_ID if string "$HAVE_AUX_DEV_ID" equals 1
diff --git a/scripts/package-build/linux-kernel/patches/i40e/0002-auxiliary-bus-type-callback-prototypes.patch b/scripts/package-build/linux-kernel/patches/i40e/0002-auxiliary-bus-type-callback-prototypes.patch
new file mode 100644
index 00000000..76a92576
--- /dev/null
+++ b/scripts/package-build/linux-kernel/patches/i40e/0002-auxiliary-bus-type-callback-prototypes.patch
@@ -0,0 +1,73 @@
+From: Christian Breunig <christian@breunig.cc>
+Date: Sun, 3 May 2026 19:44:00 +0000
+Subject: [PATCH 3/3] auxiliary: align bus callbacks with kernel prototypes
+
+---
+ src/auxiliary.c |   25 ++++++++++++++++++++++++-
+ 1 file changed, 24 insertions(+), 1 deletion(-)
+
+--- a/src/auxiliary.c
++++ b/src/auxiliary.c
+@@ -7,6 +7,7 @@
+ #include <linux/init.h>
+ #include <linux/slab.h>
+ #include <linux/module.h>
++#include <linux/version.h>
+ #include <linux/pm_domain.h>
+ #include <linux/pm_runtime.h>
+ #include <linux/string.h>
+@@ -31,7 +32,7 @@ static const struct auxiliary_device_id *auxiliary_match_id(const struct auxilia
+ 	return NULL;
+ }
+ 
+-static int auxiliary_match(struct device *dev, struct device_driver *drv)
++static int auxiliary_match_common(struct device *dev, struct device_driver *drv)
+ {
+ 	struct auxiliary_device *auxdev = to_auxiliary_dev(dev);
+ 	struct auxiliary_driver *auxdrv = to_auxiliary_drv(drv);
+@@ -39,7 +40,23 @@ static int auxiliary_match(struct device *dev, struct device_driver *drv)
+ 	return !!auxiliary_match_id(auxdrv->id_table, auxdev);
+ }
+ 
++#if LINUX_VERSION_CODE >= KERNEL_VERSION(6, 11, 0)
++static int auxiliary_match(struct device *dev, const struct device_driver *drv)
++{
++	return auxiliary_match_common(dev, (struct device_driver *)drv);
++}
++#else
++static int auxiliary_match(struct device *dev, struct device_driver *drv)
++{
++	return auxiliary_match_common(dev, drv);
++}
++#endif
++
++#if LINUX_VERSION_CODE >= KERNEL_VERSION(6, 3, 0)
++static int auxiliary_uevent(const struct device *dev, struct kobj_uevent_env *env)
++#else
+ static int auxiliary_uevent(struct device *dev, struct kobj_uevent_env *env)
++#endif
+ {
+ 	const char *name, *p;
+ 
+@@ -78,7 +95,11 @@ static int auxiliary_bus_probe(struct device *dev)
+ 	return ret;
+ }
+ 
++#if LINUX_VERSION_CODE >= KERNEL_VERSION(5, 15, 0)
++static void auxiliary_bus_remove(struct device *dev)
++#else
+ static int auxiliary_bus_remove(struct device *dev)
++#endif
+ {
+ 	struct auxiliary_driver *auxdrv = to_auxiliary_drv(dev->driver);
+ 	struct auxiliary_device *auxdev = to_auxiliary_dev(dev);
+@@ -87,7 +108,9 @@ static int auxiliary_bus_remove(struct device *dev)
+ 		auxdrv->remove(auxdev);
+ 	dev_pm_domain_detach(dev, true);
+ 
++#if LINUX_VERSION_CODE < KERNEL_VERSION(5, 15, 0)
+ 	return 0;
++#endif
+ }
+ 
+ static void auxiliary_bus_shutdown(struct device *dev)
diff --git a/scripts/package-build/linux-kernel/patches/i40e/0003-check_aux_bus-full-ksrc-and-canonical-auxiliary-header.patch b/scripts/package-build/linux-kernel/patches/i40e/0003-check_aux_bus-full-ksrc-and-canonical-auxiliary-header.patch
new file mode 100644
index 00000000..01ef8efb
--- /dev/null
+++ b/scripts/package-build/linux-kernel/patches/i40e/0003-check_aux_bus-full-ksrc-and-canonical-auxiliary-header.patch
@@ -0,0 +1,76 @@
+--- a/scripts/check_aux_bus
++++ b/scripts/check_aux_bus
+@@ -58,7 +58,14 @@ exit_not_found_failure() { exit 3; }
+ 
+ find_aux_bus_inc()
+ {
+-	aux_bus_inc=$(find -L ${ksrc} -name "auxiliary_bus.h")
++	# Prefer the main tree include (VyOS/kernel build trees may also contain
++	# packaged headers under debian/; an unbounded `find` then returns multiple
++	# paths and `[ -f "$aux_bus_inc" ]` fails, forcing needless OOT auxiliary).
++	if [ -f "${ksrc}/${LINUX_INCLUDE_DIR}/auxiliary_bus.h" ]; then
++		aux_bus_inc="${ksrc}/${LINUX_INCLUDE_DIR}/auxiliary_bus.h"
++	else
++		aux_bus_inc=$(find -L "${ksrc}" -name "auxiliary_bus.h" -print -quit)
++	fi
+ 	msg "auxiliary_bus.h location: ${aux_bus_inc}"
+ }
+ 
+@@ -101,28 +108,36 @@ find_kernel_source()
+ 
+ find_config_file()
+ {
+-	# only search for kernel .config file if build_kernel is pointing
+-	# in the same tree as ksrc (see not about ksrc and build_kernel
+-	# both set in the scripts header comment)
+-	if [[ "$ksrc" != *"/lib/modules/${build_kernel}"* ]]; then
+-		msg "ksrc=$ksrc not the same as location generated from build_kernel=\"/lib/modules/${build_kernel}\", not searching for kernel .config file"
+-	else
+-		kbuild_dir="/lib/modules/${build_kernel}/build"
++	kconfig=""
+ 
++	# Installed-modules layout: autoconf under /lib/modules/${build_kernel}/build
++	if [ -n "${build_kernel}" ] && [[ "$ksrc" == *"/lib/modules/${build_kernel}"* ]]; then
++		kbuild_dir="/lib/modules/${build_kernel}/build"
+ 		file_locations=(${kbuild_dir}/include/generated/autoconf.h \
+ 				${kbuild_dir}/include/linux/autoconf.h \
+ 				/boot/bmlinux.autoconf.h)
+-
+ 		for file in "${file_locations[@]}"; do
+-			if [ -f ${file} ]; then
++			if [ -f "${file}" ]; then
+ 				kconfig=${file}
+ 				break
+ 			fi
+ 		done
+-
+-		if [ -z ${kconfig} ]; then
++		if [ -z "${kconfig}" ]; then
+ 			msg "Kernel config file not found at any of the expected locations."
+ 		fi
++		return
++	fi
++
++	# Full source tree as --ksrc (e.g. VyOS KERNEL_DIR): read generated autoconf
++	for file in "${ksrc}/include/generated/autoconf.h" "${ksrc}/include/linux/autoconf.h"; do
++		if [ -f "${file}" ]; then
++			kconfig=${file}
++			msg "Using kernel config from ${kconfig}"
++			break
++		fi
++	done
++	if [ -z "${kconfig}" ]; then
++		msg "Kernel config file not found under ${ksrc}; will probe auxiliary_bus.h only."
+ 	fi
+ }
+ 
+@@ -131,7 +146,8 @@ get_config_auxiliary_bus()
+ 	# CONFIG_AUXILIARY_BUS=0 corresponds to CONFIG_AUXILIARY_BUS=n
+ 	# CONFIG_AUXILIARY_BUS=1 corresponds to CONFIG_AUXILIARY_BUS=y
+ 	# CONFIG_AUXILIARY_BUS= corresponds to CONFIG_AUXILIARY_BUS not available in the kernel
+-	CONFIG_AUXILIARY_BUS=$(grep CONFIG_AUXILIARY_BUS ${kconfig} | awk -F" " '{print $3}')
++	# Match the core symbol only (avoid CONFIG_AUXILIARY_BUS_MODULE, etc.)
++	CONFIG_AUXILIARY_BUS=$(grep -E '^#define CONFIG_AUXILIARY_BUS[[:space:]]' "${kconfig}" | awk '{print $3}')
+ 	msg "CONFIG_AUXILIARY_BUS=${CONFIG_AUXILIARY_BUS}"
+ }
+ 
diff --git a/scripts/package-build/linux-kernel/patches/i40e/0004-i40e_client-use-ida_alloc-ida_free.patch b/scripts/package-build/linux-kernel/patches/i40e/0004-i40e_client-use-ida_alloc-ida_free.patch
new file mode 100644
index 00000000..2dbdc5a7
--- /dev/null
+++ b/scripts/package-build/linux-kernel/patches/i40e/0004-i40e_client-use-ida_alloc-ida_free.patch
@@ -0,0 +1,37 @@
+From: Christian Breunig <christian@breunig.cc>
+Date: Sun, 3 May 2026 20:18:00 +0000
+Subject: [PATCH 2/3] i40e_client: use ida_alloc and ida_free
+
+---
+ src/i40e_client.c |    6 +++---
+ 1 file changed, 3 insertions(+), 3 deletions(-)
+
+--- a/src/i40e_client.c
++++ b/src/i40e_client.c
+@@ -288,7 +288,7 @@ static void i40e_auxiliary_dev_release(struct device *dev)
+ 	struct i40e_auxiliary_device *i40e_aux_dev =
+ 		container_of(aux_dev, struct i40e_auxiliary_device, aux_dev);
+ 
+-	ida_simple_remove(&i40e_client_ida, aux_dev->id);
++	ida_free(&i40e_client_ida, aux_dev->id);
+ 	kfree(i40e_aux_dev);
+ }
+ 
+@@ -311,7 +311,7 @@ static int i40e_register_auxiliary_dev(struct i40e_info *ldev, const char *name)
+ 	aux_dev->dev.release = i40e_auxiliary_dev_release;
+ 	ldev->aux_dev = aux_dev;
+ 
+-	ret = ida_simple_get(&i40e_client_ida, 0, 0, GFP_KERNEL);
++	ret = ida_alloc(&i40e_client_ida, GFP_KERNEL);
+ 	if (ret < 0) {
+ 		kfree(i40e_aux_dev);
+ 		return ret;
+@@ -321,7 +321,7 @@ static int i40e_register_auxiliary_dev(struct i40e_info *ldev, const char *name)
+ 
+ 	ret = auxiliary_device_init(aux_dev);
+ 	if (ret < 0) {
+-		ida_simple_remove(&i40e_client_ida, aux_dev->id);
++		ida_free(&i40e_client_ida, aux_dev->id);
+ 		kfree(i40e_aux_dev);
+ 		return ret;
+ 	}