rocker: introduce rocker switch driver

This patch introduces the first driver to benefit from the switchdev
infrastructure and to implement newly introduced switch ndos. This is a
driver for emulated switch chip implemented in qemu:
https://github.com/sfeldma/qemu-rocker/

This patch is a result of joint work with Scott Feldman.

Signed-off-by: Scott Feldman <[email protected]>
Signed-off-by: Jiri Pirko <[email protected]>
Reviewed-by: Thomas Graf <[email protected]>
Reviewed-by: John Fastabend <[email protected]>
Signed-off-by: David S. Miller <[email protected]>

MAINTAINERS

@@ -7865,6 +7865,13 @@ F:	drivers/hid/hid-roccat*
 F:	include/linux/hid-roccat*
 F:	Documentation/ABI/*/sysfs-driver-hid-roccat*
 
+ROCKER DRIVER
+M:	Jiri Pirko <[email protected]>
+M:	Scott Feldman <[email protected]>
+L:	[email protected]
+S:	Supported
+F:	drivers/net/ethernet/rocker/
+
 ROCKETPORT DRIVER
 P:	Comtrol Corp.
 W:	http://www.comtrol.com

drivers/net/ethernet/Kconfig

@@ -155,6 +155,7 @@ source "drivers/net/ethernet/qualcomm/Kconfig"
 source "drivers/net/ethernet/realtek/Kconfig"
 source "drivers/net/ethernet/renesas/Kconfig"
 source "drivers/net/ethernet/rdc/Kconfig"
+source "drivers/net/ethernet/rocker/Kconfig"
 
 config S6GMAC
 	tristate "S6105 GMAC ethernet support"

drivers/net/ethernet/Makefile

@@ -65,6 +65,7 @@ obj-$(CONFIG_NET_VENDOR_QUALCOMM) += qualcomm/
 obj-$(CONFIG_NET_VENDOR_REALTEK) += realtek/
 obj-$(CONFIG_SH_ETH) += renesas/
 obj-$(CONFIG_NET_VENDOR_RDC) += rdc/
+obj-$(CONFIG_NET_VENDOR_ROCKER) += rocker/
 obj-$(CONFIG_S6GMAC) += s6gmac.o
 obj-$(CONFIG_NET_VENDOR_SAMSUNG) += samsung/
 obj-$(CONFIG_NET_VENDOR_SEEQ) += seeq/

drivers/net/ethernet/rocker/Kconfig

@@ -0,0 +1,27 @@
+#
+# Rocker device configuration
+#
+
+config NET_VENDOR_ROCKER
+	bool "Rocker devices"
+	default y
+	---help---
+	  If you have a network 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 all
+	  the questions about Rocker devices. If you say Y, you will be asked for
+	  your specific card in the following questions.
+
+if NET_VENDOR_ROCKER
+
+config ROCKER
+	tristate "Rocker switch driver (EXPERIMENTAL)"
+	depends on PCI && NET_SWITCHDEV
+	---help---
+	  This driver supports Rocker switch device.
+
+	  To compile this driver as a module, choose M here: the
+	  module will be called rocker.
+
+endif # NET_VENDOR_ROCKER

drivers/net/ethernet/rocker/Makefile

@@ -0,0 +1,5 @@
+#
+# Makefile for the Rocker network device drivers.
+#
+
+obj-$(CONFIG_ROCKER) += rocker.o