[PATCH net-next 3/4] net: mana: Build the PCI transport as a separate module
From: Manish Awasthi
Date: Thu Sep 24 2026 - 14:04:05 EST
Build the shared GDMA and Ethernet code as gdma_core.ko, selected by
MICROSOFT_GDMA_CORE. Build the PCI transport separately as mana.ko and
export the required core symbols.
Preserve the PCI module name, device table, and mana.eth/mana.rdma
auxiliary-device names. Each transport registers its own bus driver.
Signed-off-by: Manish Awasthi <mawasthi@xxxxxxxxxxxxxxxxxxx>
---
drivers/net/ethernet/microsoft/Kconfig | 12 ++++++---
drivers/net/ethernet/microsoft/Makefile | 2 +-
drivers/net/ethernet/microsoft/mana/Makefile | 7 ++++--
.../net/ethernet/microsoft/mana/gdma_main.c | 25 ++++++-------------
.../net/ethernet/microsoft/mana/gdma_pci.c | 11 ++++++--
drivers/net/ethernet/microsoft/mana/mana_en.c | 7 +++++-
include/net/mana/gdma.h | 3 ---
7 files changed, 36 insertions(+), 31 deletions(-)
diff --git a/drivers/net/ethernet/microsoft/Kconfig b/drivers/net/ethernet/microsoft/Kconfig
index e9be18c92ca5..ee5bc1c1bf59 100644
--- a/drivers/net/ethernet/microsoft/Kconfig
+++ b/drivers/net/ethernet/microsoft/Kconfig
@@ -15,15 +15,19 @@ config NET_VENDOR_MICROSOFT
if NET_VENDOR_MICROSOFT
+config MICROSOFT_GDMA_CORE
+ tristate
+ select AUXILIARY_BUS
+ select DIMLIB
+ select PAGE_POOL
+ select NET_SHAPER
+
config MICROSOFT_MANA
tristate "Microsoft Azure Network Adapter (MANA) support"
depends on PCI_MSI
depends on X86_64 || (ARM64 && !CPU_BIG_ENDIAN)
depends on PCI_HYPERV
- select AUXILIARY_BUS
- select DIMLIB
- select PAGE_POOL
- select NET_SHAPER
+ select MICROSOFT_GDMA_CORE
help
This driver supports Microsoft Azure Network Adapter (MANA).
So far, the driver is only supported on X86_64.
diff --git a/drivers/net/ethernet/microsoft/Makefile b/drivers/net/ethernet/microsoft/Makefile
index d2ddc218135f..c3b6dafdf473 100644
--- a/drivers/net/ethernet/microsoft/Makefile
+++ b/drivers/net/ethernet/microsoft/Makefile
@@ -2,4 +2,4 @@
# Makefile for the Microsoft Azure network device driver.
#
-obj-$(CONFIG_MICROSOFT_MANA) += mana/
+obj-$(CONFIG_MICROSOFT_GDMA_CORE) += mana/
diff --git a/drivers/net/ethernet/microsoft/mana/Makefile b/drivers/net/ethernet/microsoft/mana/Makefile
index 6705bf65c92c..72c03fb6e441 100644
--- a/drivers/net/ethernet/microsoft/mana/Makefile
+++ b/drivers/net/ethernet/microsoft/mana/Makefile
@@ -2,6 +2,9 @@
#
# Makefile for the Microsoft Azure Network Adapter driver
+obj-$(CONFIG_MICROSOFT_GDMA_CORE) += gdma_core.o
+gdma_core-y := gdma_main.o shm_channel.o hw_channel.o mana_en.o mana_ethtool.o \
+ mana_bpf.o
+
obj-$(CONFIG_MICROSOFT_MANA) += mana.o
-mana-y := gdma_main.o shm_channel.o hw_channel.o mana_en.o mana_ethtool.o mana_bpf.o \
- gdma_pci.o
+mana-y := gdma_pci.o
diff --git a/drivers/net/ethernet/microsoft/mana/gdma_main.c b/drivers/net/ethernet/microsoft/mana/gdma_main.c
index 531170e58a62..ae0ed700b3b9 100644
--- a/drivers/net/ethernet/microsoft/mana/gdma_main.c
+++ b/drivers/net/ethernet/microsoft/mana/gdma_main.c
@@ -1991,6 +1991,7 @@ int mana_gd_setup(struct gdma_context *gc)
dev_err(gc->dev, "%s failed (error %d)\n", __func__, err);
return err;
}
+EXPORT_SYMBOL_NS(mana_gd_setup, "NET_MANA");
void mana_gd_cleanup(struct gdma_context *gc)
{
@@ -2005,36 +2006,24 @@ void mana_gd_cleanup(struct gdma_context *gc)
dev_dbg(gc->dev, "mana gdma cleanup successful\n");
}
+EXPORT_SYMBOL_NS(mana_gd_cleanup, "NET_MANA");
-static int __init mana_driver_init(void)
+static int __init gdma_core_init(void)
{
- int err;
-
mana_debugfs_root = debugfs_create_dir("mana", NULL);
- err = mana_pci_driver_register();
- if (err)
- goto err_debugfs;
-
return 0;
-
-err_debugfs:
- debugfs_remove(mana_debugfs_root);
- mana_debugfs_root = NULL;
- return err;
}
-static void __exit mana_driver_exit(void)
+static void __exit gdma_core_exit(void)
{
- mana_pci_driver_unregister();
-
debugfs_remove(mana_debugfs_root);
mana_debugfs_root = NULL;
}
-module_init(mana_driver_init);
-module_exit(mana_driver_exit);
+module_init(gdma_core_init);
+module_exit(gdma_core_exit);
MODULE_LICENSE("Dual BSD/GPL");
-MODULE_DESCRIPTION("Microsoft Azure Network Adapter driver");
+MODULE_DESCRIPTION("Microsoft Azure Network Adapter GDMA core");
diff --git a/drivers/net/ethernet/microsoft/mana/gdma_pci.c b/drivers/net/ethernet/microsoft/mana/gdma_pci.c
index 4f6a77f55e5a..92a1e66e18b7 100644
--- a/drivers/net/ethernet/microsoft/mana/gdma_pci.c
+++ b/drivers/net/ethernet/microsoft/mana/gdma_pci.c
@@ -878,7 +878,7 @@ static struct pci_driver mana_driver = {
MODULE_DEVICE_TABLE(pci, mana_id_table);
-int mana_pci_driver_register(void)
+static int __init mana_driver_init(void)
{
INIT_LIST_HEAD(&mana_dev_recovery_work.dev_list);
spin_lock_init(&mana_dev_recovery_work.lock);
@@ -888,7 +888,7 @@ int mana_pci_driver_register(void)
return pci_register_driver(&mana_driver);
}
-void mana_pci_driver_unregister(void)
+static void __exit mana_driver_exit(void)
{
struct mana_dev_recovery *dev;
unsigned long flags;
@@ -907,3 +907,10 @@ void mana_pci_driver_unregister(void)
pci_unregister_driver(&mana_driver);
}
+
+module_init(mana_driver_init);
+module_exit(mana_driver_exit);
+
+MODULE_LICENSE("Dual BSD/GPL");
+MODULE_DESCRIPTION("Microsoft Azure Network Adapter driver");
+MODULE_IMPORT_NS("NET_MANA");
diff --git a/drivers/net/ethernet/microsoft/mana/mana_en.c b/drivers/net/ethernet/microsoft/mana/mana_en.c
index 62b89b3d6072..16a9d192c099 100644
--- a/drivers/net/ethernet/microsoft/mana/mana_en.c
+++ b/drivers/net/ethernet/microsoft/mana/mana_en.c
@@ -3957,7 +3957,8 @@ static int add_adev(struct gdma_dev *gd, const char *name)
/* madev is owned by the auxiliary device */
madev = NULL;
- ret = auxiliary_device_add(adev);
+ /* Keep the established mana.{eth,rdma} auxiliary match names. */
+ ret = __auxiliary_device_add(adev, "mana");
if (ret)
goto add_fail;
@@ -4194,6 +4195,7 @@ int mana_probe(struct gdma_dev *gd, bool resuming)
return err;
}
+EXPORT_SYMBOL_NS(mana_probe, "NET_MANA");
void mana_remove(struct gdma_dev *gd, bool suspending)
{
@@ -4272,6 +4274,7 @@ void mana_remove(struct gdma_dev *gd, bool suspending)
kfree(ac);
dev_dbg(dev, "%s succeeded\n", __func__);
}
+EXPORT_SYMBOL_NS(mana_remove, "NET_MANA");
int mana_rdma_probe(struct gdma_dev *gd)
{
@@ -4307,6 +4310,7 @@ int mana_rdma_probe(struct gdma_dev *gd)
return err;
}
+EXPORT_SYMBOL_NS(mana_rdma_probe, "NET_MANA");
void mana_rdma_remove(struct gdma_dev *gd)
{
@@ -4327,6 +4331,7 @@ void mana_rdma_remove(struct gdma_dev *gd)
mana_gd_deregister_device(gd);
}
+EXPORT_SYMBOL_NS(mana_rdma_remove, "NET_MANA");
struct net_device *mana_get_primary_netdev(struct mana_context *ac,
u32 port_index,
diff --git a/include/net/mana/gdma.h b/include/net/mana/gdma.h
index 238ff8b9f067..cdec5558304f 100644
--- a/include/net/mana/gdma.h
+++ b/include/net/mana/gdma.h
@@ -1175,7 +1175,4 @@ int mana_gd_query_device_cfg(struct gdma_context *gc, u32 proto_major_ver,
u16 *max_num_vports, u8 *bm_hostmode);
int mana_gd_dev_reset(struct gdma_context *gc);
-int mana_pci_driver_register(void);
-void mana_pci_driver_unregister(void);
-
#endif /* _GDMA_H */
--
2.54.0