RDMA/ionic: Add Makefile/Kconfig to kernel build environment

Add ionic to the kernel build environment.

Co-developed-by: Allen Hubbe <[e-mail]>
Signed-off-by: Allen Hubbe <[e-mail]>
Signed-off-by: Abhijit Gangurde <[e-mail]>
Link: https://patch.msgid.link/[e-mail]
Signed-off-by: Leon Romanovsky <[e-mail]>

Documentation/networking/device_drivers/ethernet/index.rst

···
    neterion/s2io
    netronome/nfp
    pensando/ionic
+   pensando/ionic_rdma
    smsc/smc9
    stmicro/stmmac
    ti/cpsw

Documentation/networking/device_drivers/ethernet/pensando/ionic_rdma.rst

···
+.. SPDX-License-Identifier: GPL-2.0+
+
+===========================================================
+RDMA Driver for the AMD Pensando(R) Ethernet adapter family
+===========================================================
+
+AMD Pensando RDMA driver.
+Copyright (C) 2018-2025, Advanced Micro Devices, Inc.
+
+Overview
+========
+
+The ionic_rdma driver provides Remote Direct Memory Access functionality
+for AMD Pensando DSC (Distributed Services Card) devices. This driver
+implements RDMA capabilities as an auxiliary driver that operates in
+conjunction with the ionic ethernet driver.
+
+The ionic ethernet driver detects RDMA capability during device
+initialization and creates auxiliary devices that the ionic_rdma driver
+binds to, establishing the RDMA data path and control interfaces.
+
+Identifying the Adapter
+=======================
+
+See Documentation/networking/device_drivers/ethernet/pensando/ionic.rst
+for more information on identifying the adapter.
+
+Enabling the driver
+===================
+
+The ionic_rdma driver depends on the ionic ethernet driver.
+See Documentation/networking/device_drivers/ethernet/pensando/ionic.rst
+for detailed information on enabling and configuring the ionic driver.
+
+The ionic_rdma driver is enabled via the standard kernel configuration system,
+using the make command::
+
+  make oldconfig/menuconfig/etc.
+
+The driver is located in the menu structure at:
+
+  -> Device Drivers
+    -> InfiniBand support
+      -> AMD Pensando DSC RDMA/RoCE Support
+
+Support
+=======
+
+For general Linux RDMA support, please use the RDMA mailing
+list, which is monitored by AMD Pensando personnel::
+
+  [e-mail]

MAINTAINERS

···
 F:	drivers/net/ethernet/amd/pds_core/
 F:	include/linux/pds/
 
+AMD PENSANDO RDMA DRIVER
+M:	Abhijit Gangurde <[e-mail]>
+M:	Allen Hubbe <[e-mail]>
+L:	[e-mail]
+S:	Maintained
+F:	Documentation/networking/device_drivers/ethernet/pensando/ionic_rdma.rst
+F:	drivers/infiniband/hw/ionic/
+F:	include/uapi/rdma/ionic-abi.h
+
 AMD PMC DRIVER
 M:	Shyam Sundar S K <[e-mail]>
 L:	[e-mail]

drivers/infiniband/Kconfig

···
 source "drivers/infiniband/hw/erdma/Kconfig"
 source "drivers/infiniband/hw/hfi1/Kconfig"
 source "drivers/infiniband/hw/hns/Kconfig"
+source "drivers/infiniband/hw/ionic/Kconfig"
 source "drivers/infiniband/hw/irdma/Kconfig"
 source "drivers/infiniband/hw/mana/Kconfig"
 source "drivers/infiniband/hw/mlx4/Kconfig"

drivers/infiniband/hw/Makefile

···
 obj-$(CONFIG_INFINIBAND_QEDR)		+= qedr/
 obj-$(CONFIG_INFINIBAND_BNXT_RE)	+= bnxt_re/
 obj-$(CONFIG_INFINIBAND_ERDMA)		+= erdma/
+obj-$(CONFIG_INFINIBAND_IONIC)		+= ionic/

drivers/infiniband/hw/ionic/Kconfig

···
+# SPDX-License-Identifier: GPL-2.0
+# Copyright (C) 2018-2025, Advanced Micro Devices, Inc.
+
+config INFINIBAND_IONIC
+	tristate "AMD Pensando DSC RDMA/RoCE Support"
+	depends on NETDEVICES && ETHERNET && PCI && INET && IONIC
+	help
+	  This enables RDMA/RoCE support for the AMD Pensando family of
+	  Distributed Services Cards (DSCs).
+
+	  To learn more, visit our website at
+	  <https://www.amd.com/en/products/accelerators/pensando.html>.
+
+	  To compile this driver as a module, choose M here. The module
+	  will be called ionic_rdma.

drivers/infiniband/hw/ionic/Makefile

···
+# SPDX-License-Identifier: GPL-2.0
+
+ccflags-y :=  -I $(srctree)/drivers/net/ethernet/pensando/ionic
+
+obj-$(CONFIG_INFINIBAND_IONIC)	+= ionic_rdma.o
+
+ionic_rdma-y :=	\
+	ionic_ibdev.o ionic_lif_cfg.o ionic_queue.o ionic_pgtbl.o ionic_admin.o \
+	ionic_controlpath.o ionic_datapath.o ionic_hw_stats.o