ionic: Add initial ethtool support

Add in the basic ethtool callbacks for device information
and control.

Signed-off-by: Shannon Nelson <snelson@pensando.io>
Signed-off-by: David S. Miller <davem@davemloft.net>

Author: emusln

drivers/net/ethernet/pensando/ionic/Makefile

@@ -4,4 +4,4 @@
 obj-$(CONFIG_IONIC) := ionic.o
 
 ionic-y := ionic_main.o ionic_bus_pci.o ionic_devlink.o ionic_dev.o \
-	   ionic_debugfs.o ionic_lif.o ionic_rx_filter.o
+	   ionic_debugfs.o ionic_lif.o ionic_rx_filter.o ionic_ethtool.o

drivers/net/ethernet/pensando/ionic/ionic_dev.h

@@ -12,8 +12,15 @@
 
 #define IONIC_MIN_MTU			ETH_MIN_MTU
 #define IONIC_MAX_MTU			9194
+#define IONIC_MAX_TXRX_DESC		16384
+#define IONIC_MIN_TXRX_DESC		16
+#define IONIC_DEF_TXRX_DESC		4096
 #define IONIC_LIFS_MAX			1024
 
+#define IONIC_DEV_CMD_REG_VERSION	1
+#define IONIC_DEV_INFO_REG_COUNT	32
+#define IONIC_DEV_CMD_REG_COUNT		32
+
 struct ionic_dev_bar {
 	void __iomem *vaddr;
 	phys_addr_t bus_addr;