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>

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;

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

+/* SPDX-License-Identifier: GPL-2.0 */
+/* Copyright(c) 2017 - 2019 Pensando Systems, Inc */
+
+#ifndef _IONIC_ETHTOOL_H_
+#define _IONIC_ETHTOOL_H_
+
+void ionic_ethtool_set_ops(struct net_device *netdev);
+
+#endif /* _IONIC_ETHTOOL_H_ */

drivers/net/ethernet/pensando/ionic/ionic_lif.c

@@ -10,6 +10,7 @@
 #include "ionic.h"
 #include "ionic_bus.h"
 #include "ionic_lif.h"
+#include "ionic_ethtool.h"
 #include "ionic_debugfs.h"
 
 static void ionic_lif_rx_mode(struct ionic_lif *lif, unsigned int rx_mode);
@@ -1162,6 +1163,7 @@ static struct ionic_lif *ionic_lif_alloc(struct ionic *ionic, unsigned int index
 	lif->netdev = netdev;
 	ionic->master_lif = lif;
 	netdev->netdev_ops = &ionic_netdev_ops;
+	ionic_ethtool_set_ops(netdev);
 
 	netdev->watchdog_timeo = 2 * HZ;
 	netdev->min_mtu = IONIC_MIN_MTU;

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

@@ -109,6 +109,8 @@ struct ionic_lif {
 	u64 last_eid;
 	unsigned int neqs;
 	unsigned int nxqs;
+	unsigned int ntxq_descs;
+	unsigned int nrxq_descs;
 	unsigned int rx_mode;
 	u64 hw_features;
 	bool mc_overflow;
@@ -125,6 +127,7 @@ struct ionic_lif {
 	unsigned long *dbid_inuse;
 	unsigned int dbid_count;
 	struct dentry *dentry;
+	u32 rx_coalesce_usecs;
 	u32 flags;
 };