net: mana: Add a driver for Microsoft Azure Network Adapter (MANA)

Add a VF driver for Microsoft Azure Network Adapter (MANA) that will be
available in the future.

Co-developed-by: Haiyang Zhang <haiyangz@microsoft.com>
Signed-off-by: Haiyang Zhang <haiyangz@microsoft.com>
Signed-off-by: Dexuan Cui <decui@microsoft.com>

MAINTAINERS

@@ -8261,11 +8261,12 @@ S:	Maintained
 T:	git git://linuxtv.org/media_tree.git
 F:	drivers/media/i2c/hi556.c
 
-Hyper-V CORE AND DRIVERS
+Hyper-V/Azure CORE AND DRIVERS
 M:	"K. Y. Srinivasan" <kys@microsoft.com>
 M:	Haiyang Zhang <haiyangz@microsoft.com>
 M:	Stephen Hemminger <sthemmin@microsoft.com>
 M:	Wei Liu <wei.liu@kernel.org>
+M:	Dexuan Cui <decui@microsoft.com>
 L:	linux-hyperv@vger.kernel.org
 S:	Supported
 T:	git git://git.kernel.org/pub/scm/linux/kernel/git/hyperv/linux.git
@@ -8282,6 +8283,7 @@ F:	drivers/hid/hid-hyperv.c
 F:	drivers/hv/
 F:	drivers/input/serio/hyperv-keyboard.c
 F:	drivers/iommu/hyperv-iommu.c
+F:	drivers/net/ethernet/microsoft/
 F:	drivers/net/hyperv/
 F:	drivers/pci/controller/pci-hyperv-intf.c
 F:	drivers/pci/controller/pci-hyperv.c

drivers/net/ethernet/Kconfig

@@ -82,6 +82,7 @@ source "drivers/net/ethernet/huawei/Kconfig"
 source "drivers/net/ethernet/i825xx/Kconfig"
 source "drivers/net/ethernet/ibm/Kconfig"
 source "drivers/net/ethernet/intel/Kconfig"
+source "drivers/net/ethernet/microsoft/Kconfig"
 source "drivers/net/ethernet/xscale/Kconfig"
 
 config JME

drivers/net/ethernet/Makefile

@@ -45,6 +45,7 @@ obj-$(CONFIG_NET_VENDOR_HUAWEI) += huawei/
 obj-$(CONFIG_NET_VENDOR_IBM) += ibm/
 obj-$(CONFIG_NET_VENDOR_INTEL) += intel/
 obj-$(CONFIG_NET_VENDOR_I825XX) += i825xx/
+obj-$(CONFIG_NET_VENDOR_MICROSOFT) += microsoft/
 obj-$(CONFIG_NET_VENDOR_XSCALE) += xscale/
 obj-$(CONFIG_JME) += jme.o
 obj-$(CONFIG_KORINA) += korina.o

drivers/net/ethernet/microsoft/Kconfig

@@ -0,0 +1,30 @@
+#
+# Microsoft Azure network device configuration
+#
+
+config NET_VENDOR_MICROSOFT
+	bool "Microsoft Azure Network Device"
+	default y
+	help
+	  If you have a network (Ethernet) device belonging to this class, say Y.
+
+	  Note that the answer to this question doesn't directly affect the
+	  kernel: saying N will just cause the configurator to skip the
+	  question about Microsoft Azure network device. If you say Y, you
+	  will be asked for your specific device in the following question.
+
+if NET_VENDOR_MICROSOFT
+
+config MICROSOFT_MANA
+	tristate "Microsoft Azure Network Adapter (MANA) support"
+	default m
+	depends on PCI_MSI && X86_64
+	select PCI_HYPERV
+	help
+	  This driver supports Microsoft Azure Network Adapter (MANA).
+	  So far, the driver is only validated on X86_64.
+
+	  To compile this driver as a module, choose M here.
+	  The module will be called mana.
+
+endif #NET_VENDOR_MICROSOFT

drivers/net/ethernet/microsoft/Makefile

@@ -0,0 +1,5 @@
+#
+# Makefile for the Microsoft Azure network device driver.
+#
+
+obj-$(CONFIG_MICROSOFT_MANA) += mana/

drivers/net/ethernet/microsoft/mana/Makefile

@@ -0,0 +1,6 @@
+# SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
+#
+# Makefile for the Microsoft Azure Network Adapter driver
+
+obj-$(CONFIG_MICROSOFT_MANA) += mana.o
+mana-objs := gdma_main.o shm_channel.o hw_channel.o mana_en.o mana_ethtool.o