[PATCH rdma v5 1/7] RDMA/zrdma: Add build infrastructure and module skeleton

[Yanze Zhang]

Add MAINTAINERS entry, Kconfig, and Makefile entries for the ZTE DingHai
RDMA driver. Include a minimal module skeleton with auxiliary driver
registration structure to ensure the build system works and the module
can be loaded.

Signed-off-by: Yanze Zhang <zhang.yanze@xxxxxxxxxx>
---
 MAINTAINERS                              |  6 +++
 drivers/infiniband/Kconfig               |  1 +
 drivers/infiniband/hw/Makefile           |  1 +
 drivers/infiniband/hw/zrdma/Kconfig      | 12 +++++
 drivers/infiniband/hw/zrdma/Makefile     |  4 ++
 drivers/infiniband/hw/zrdma/zrdma_main.c | 59 ++++++++++++++++++++++++
 include/uapi/rdma/ib_user_ioctl_verbs.h  |  1 +
 7 files changed, 84 insertions(+)
 create mode 100644 drivers/infiniband/hw/zrdma/Kconfig
 create mode 100644 drivers/infiniband/hw/zrdma/Makefile
 create mode 100644 drivers/infiniband/hw/zrdma/zrdma_main.c

diff --git a/MAINTAINERS b/MAINTAINERS
index 806bd2d80d15..e1369b20a1ef 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -29831,6 +29831,12 @@ S:	Maintained
 T:	git git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound.git
 F:	sound/hda/codecs/senarytech.c
 
+ZTE DINGHAI ZRDMA DRIVER
+M:	Yanze Zhang <zhang.yanze@xxxxxxxxxx>
+L:	linux-rdma@xxxxxxxxxxxxxxx
+S:	Supported
+F:	drivers/infiniband/hw/zrdma/
+
 THE REST
 M:	Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
 L:	linux-kernel@xxxxxxxxxxxxxxx
diff --git a/drivers/infiniband/Kconfig b/drivers/infiniband/Kconfig
index 086195758a8a..419dbf742f38 100644
--- a/drivers/infiniband/Kconfig
+++ b/drivers/infiniband/Kconfig
@@ -100,6 +100,7 @@ source "drivers/infiniband/hw/ocrdma/Kconfig"
 source "drivers/infiniband/hw/qedr/Kconfig"
 source "drivers/infiniband/hw/usnic/Kconfig"
 source "drivers/infiniband/hw/vmw_pvrdma/Kconfig"
+source "drivers/infiniband/hw/zrdma/Kconfig"
 source "drivers/infiniband/sw/rdmavt/Kconfig"
 endif # !UML
 source "drivers/infiniband/sw/rxe/Kconfig"
diff --git a/drivers/infiniband/hw/Makefile b/drivers/infiniband/hw/Makefile
index c42b22ac3303..a86b867c56d4 100644
--- a/drivers/infiniband/hw/Makefile
+++ b/drivers/infiniband/hw/Makefile
@@ -16,3 +16,4 @@ obj-$(CONFIG_INFINIBAND_BNXT_RE)	+= bnxt_re/
 obj-$(CONFIG_INFINIBAND_BNG_RE)		+= bng_re/
 obj-$(CONFIG_INFINIBAND_ERDMA)		+= erdma/
 obj-$(CONFIG_INFINIBAND_IONIC)		+= ionic/
+obj-$(CONFIG_INFINIBAND_ZRDMA)		+= zrdma/
diff --git a/drivers/infiniband/hw/zrdma/Kconfig b/drivers/infiniband/hw/zrdma/Kconfig
new file mode 100644
index 000000000000..bfe21c123217
--- /dev/null
+++ b/drivers/infiniband/hw/zrdma/Kconfig
@@ -0,0 +1,12 @@
+# SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB
+config INFINIBAND_ZRDMA
+	tristate "ZTE Ethernet Protocol Driver for RDMA"
+	depends on PCI
+	depends on NETDEVICES
+	select AUXILIARY_BUS
+	help
+	  Say Y or M here to enable support for the ZTE DingHai (ZXDH) Ethernet
+	  Protocol Driver for RDMA. This driver provides RDMA over Converged
+	  Ethernet (RoCE) functionality for ZTE DingHai network adapters.
+	  If you choose to build this driver as a module, it will be built as
+	  a module named zrdma.
diff --git a/drivers/infiniband/hw/zrdma/Makefile b/drivers/infiniband/hw/zrdma/Makefile
new file mode 100644
index 000000000000..2ddf50d1fd20
--- /dev/null
+++ b/drivers/infiniband/hw/zrdma/Makefile
@@ -0,0 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB
+
+obj-$(CONFIG_INFINIBAND_ZRDMA) += zrdma.o
+zrdma-y := zrdma_main.o
diff --git a/drivers/infiniband/hw/zrdma/zrdma_main.c b/drivers/infiniband/hw/zrdma/zrdma_main.c
new file mode 100644
index 000000000000..7954d86573e2
--- /dev/null
+++ b/drivers/infiniband/hw/zrdma/zrdma_main.c
@@ -0,0 +1,59 @@
+// SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB
+/*
+ * ZTE DingHai Rdma driver
+ * Copyright (c) 2022-2026, ZTE Corporation
+ */
+
+#include <linux/module.h>
+#include <linux/auxiliary_bus.h>
+
+#define ZXDH_PF_NAME "dinghai10e"
+#define ZXDH_RDMA_DEV_NAME "rdma_aux"
+
+MODULE_LICENSE("Dual BSD/GPL");
+MODULE_AUTHOR("Yanze Zhang <zhang.yanze@xxxxxxxxxx>");
+MODULE_DESCRIPTION("ZTE Ethernet Protocol Driver for RDMA");
+
+static const struct auxiliary_device_id zxdh_auxiliary_id_table[] = {
+	{
+		.name = ZXDH_PF_NAME "." ZXDH_RDMA_DEV_NAME,
+	},
+	{},
+};
+
+MODULE_DEVICE_TABLE(auxiliary, zxdh_auxiliary_id_table);
+
+static int zxdh_probe(struct auxiliary_device *aux_dev,
+		      const struct auxiliary_device_id *id)
+{
+	/* Placeholder: Real probe logic will be added in subsequent patches */
+	dev_info(&aux_dev->dev, "ZTE DingHai RDMA device detected (stub)\n");
+	return 0;
+}
+
+static void zxdh_remove(struct auxiliary_device *aux_dev)
+{
+	dev_info(&aux_dev->dev, "ZTE DingHai RDMA device removed (stub)\n");
+}
+
+static struct auxiliary_driver zxdh_auxiliary_drv = {
+	.driver = {
+		.name = ZXDH_RDMA_DEV_NAME,
+	},
+	.id_table = zxdh_auxiliary_id_table,
+	.probe = zxdh_probe,
+	.remove = zxdh_remove,
+};
+
+static int __init zrdma_module_init(void)
+{
+	return auxiliary_driver_register(&zxdh_auxiliary_drv);
+}
+
+static void __exit zrdma_module_exit(void)
+{
+	auxiliary_driver_unregister(&zxdh_auxiliary_drv);
+}
+
+module_init(zrdma_module_init);
+module_exit(zrdma_module_exit);
diff --git a/include/uapi/rdma/ib_user_ioctl_verbs.h b/include/uapi/rdma/ib_user_ioctl_verbs.h
index 21f86cc7bb1f..98dcea207357 100644
--- a/include/uapi/rdma/ib_user_ioctl_verbs.h
+++ b/include/uapi/rdma/ib_user_ioctl_verbs.h
@@ -257,6 +257,7 @@ enum rdma_driver_id {
 	RDMA_DRIVER_ERDMA,
 	RDMA_DRIVER_MANA,
 	RDMA_DRIVER_IONIC,
+	RDMA_DRIVER_ZRDMA,
 };
 
 enum ib_uverbs_gid_type {
-- 
2.27.0