dpaa_eth: add ethtool functionality

Add support for basic ethtool operations.
Signed-off-by: NMadalin Bucur <madalin.bucur@nxp.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

drivers/net/ethernet/freescale/dpaa/Makefile

@@ -8,4 +8,4 @@ ccflags-y += -I$(FMAN)
 
 obj-$(CONFIG_FSL_DPAA_ETH) += fsl_dpa.o
 
-fsl_dpa-objs += dpaa_eth.o
+fsl_dpa-objs += dpaa_eth.o dpaa_ethtool.o

drivers/net/ethernet/freescale/dpaa/dpaa_eth.c

@@ -240,6 +240,8 @@ static int dpaa_netdev_init(struct net_device *net_dev,
 	memcpy(net_dev->perm_addr, mac_addr, net_dev->addr_len);
 	memcpy(net_dev->dev_addr, mac_addr, net_dev->addr_len);
 
+	net_dev->ethtool_ops = &dpaa_ethtool_ops;
+
 	net_dev->needed_headroom = priv->tx_headroom;
 	net_dev->watchdog_timeo = msecs_to_jiffies(tx_timeout);
 

drivers/net/ethernet/freescale/dpaa/dpaa_eth.h

@@ -141,4 +141,7 @@ struct dpaa_priv {
 	struct dpaa_buffer_layout buf_layout[2];
 	u16 rx_headroom;
 };
+
+/* from dpaa_ethtool.c */
+extern const struct ethtool_ops dpaa_ethtool_ops;
 #endif	/* __DPAA_H */

drivers/net/ethernet/freescale/dpaa/dpaa_ethtool.c

+/* Copyright 2008-2016 Freescale Semiconductor, Inc.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *     * Redistributions of source code must retain the above copyright
+ *	 notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above copyright
+ *	 notice, this list of conditions and the following disclaimer in the
+ *	 documentation and/or other materials provided with the distribution.
+ *     * Neither the name of Freescale Semiconductor nor the
+ *	 names of its contributors may be used to endorse or promote products
+ *	 derived from this software without specific prior written permission.
+ *
+ *
+ * ALTERNATIVELY, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL") as published by the Free Software
+ * Foundation, either version 2 of that License or (at your option) any
+ * later version.
+ *
+ * THIS SOFTWARE IS PROVIDED BY Freescale Semiconductor ``AS IS'' AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL Freescale Semiconductor BE LIABLE FOR ANY
+ * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <linux/string.h>
+
+#include "dpaa_eth.h"
+#include "mac.h"
+
+static int dpaa_get_settings(struct net_device *net_dev,
+			     struct ethtool_cmd *et_cmd)
+{
+	int err;
+
+	if (!net_dev->phydev) {
+		netdev_dbg(net_dev, "phy device not initialized\n");
+		return 0;
+	}
+
+	err = phy_ethtool_gset(net_dev->phydev, et_cmd);
+
+	return err;
+}
+
+static int dpaa_set_settings(struct net_device *net_dev,
+			     struct ethtool_cmd *et_cmd)
+{
+	int err;
+
+	if (!net_dev->phydev) {
+		netdev_err(net_dev, "phy device not initialized\n");
+		return -ENODEV;
+	}
+
+	err = phy_ethtool_sset(net_dev->phydev, et_cmd);
+	if (err < 0)
+		netdev_err(net_dev, "phy_ethtool_sset() = %d\n", err);
+
+	return err;
+}
+
+static void dpaa_get_drvinfo(struct net_device *net_dev,
+			     struct ethtool_drvinfo *drvinfo)
+{
+	int len;
+
+	strlcpy(drvinfo->driver, KBUILD_MODNAME,
+		sizeof(drvinfo->driver));
+	len = snprintf(drvinfo->version, sizeof(drvinfo->version),
+		       "%X", 0);
+	len = snprintf(drvinfo->fw_version, sizeof(drvinfo->fw_version),
+		       "%X", 0);
+
+	if (len >= sizeof(drvinfo->fw_version)) {
+		/* Truncated output */
+		netdev_notice(net_dev, "snprintf() = %d\n", len);
+	}
+	strlcpy(drvinfo->bus_info, dev_name(net_dev->dev.parent->parent),
+		sizeof(drvinfo->bus_info));
+}
+
+static u32 dpaa_get_msglevel(struct net_device *net_dev)
+{
+	return ((struct dpaa_priv *)netdev_priv(net_dev))->msg_enable;
+}
+
+static void dpaa_set_msglevel(struct net_device *net_dev,
+			      u32 msg_enable)
+{
+	((struct dpaa_priv *)netdev_priv(net_dev))->msg_enable = msg_enable;
+}
+
+static int dpaa_nway_reset(struct net_device *net_dev)
+{
+	int err;
+
+	if (!net_dev->phydev) {
+		netdev_err(net_dev, "phy device not initialized\n");
+		return -ENODEV;
+	}
+
+	err = 0;
+	if (net_dev->phydev->autoneg) {
+		err = phy_start_aneg(net_dev->phydev);
+		if (err < 0)
+			netdev_err(net_dev, "phy_start_aneg() = %d\n",
+				   err);
+	}
+
+	return err;
+}
+
+static void dpaa_get_pauseparam(struct net_device *net_dev,
+				struct ethtool_pauseparam *epause)
+{
+	struct mac_device *mac_dev;
+	struct dpaa_priv *priv;
+
+	priv = netdev_priv(net_dev);
+	mac_dev = priv->mac_dev;
+
+	if (!net_dev->phydev) {
+		netdev_err(net_dev, "phy device not initialized\n");
+		return;
+	}
+
+	epause->autoneg = mac_dev->autoneg_pause;
+	epause->rx_pause = mac_dev->rx_pause_active;
+	epause->tx_pause = mac_dev->tx_pause_active;
+}
+
+static int dpaa_set_pauseparam(struct net_device *net_dev,
+			       struct ethtool_pauseparam *epause)
+{
+	struct mac_device *mac_dev;
+	struct phy_device *phydev;
+	bool rx_pause, tx_pause;
+	struct dpaa_priv *priv;
+	u32 newadv, oldadv;
+	int err;
+
+	priv = netdev_priv(net_dev);
+	mac_dev = priv->mac_dev;
+
+	phydev = net_dev->phydev;
+	if (!phydev) {
+		netdev_err(net_dev, "phy device not initialized\n");
+		return -ENODEV;
+	}
+
+	if (!(phydev->supported & SUPPORTED_Pause) ||
+	    (!(phydev->supported & SUPPORTED_Asym_Pause) &&
+	    (epause->rx_pause != epause->tx_pause)))
+		return -EINVAL;
+
+	/* The MAC should know how to handle PAUSE frame autonegotiation before
+	 * adjust_link is triggered by a forced renegotiation of sym/asym PAUSE
+	 * settings.
+	 */
+	mac_dev->autoneg_pause = !!epause->autoneg;
+	mac_dev->rx_pause_req = !!epause->rx_pause;
+	mac_dev->tx_pause_req = !!epause->tx_pause;
+
+	/* Determine the sym/asym advertised PAUSE capabilities from the desired
+	 * rx/tx pause settings.
+	 */
+	newadv = 0;
+	if (epause->rx_pause)
+		newadv = ADVERTISED_Pause | ADVERTISED_Asym_Pause;
+	if (epause->tx_pause)
+		newadv |= ADVERTISED_Asym_Pause;
+
+	oldadv = phydev->advertising &
+			(ADVERTISED_Pause | ADVERTISED_Asym_Pause);
+
+	/* If there are differences between the old and the new advertised
+	 * values, restart PHY autonegotiation and advertise the new values.
+	 */
+	if (oldadv != newadv) {
+		phydev->advertising &= ~(ADVERTISED_Pause
+				| ADVERTISED_Asym_Pause);
+		phydev->advertising |= newadv;
+		if (phydev->autoneg) {
+			err = phy_start_aneg(phydev);
+			if (err < 0)
+				netdev_err(net_dev, "phy_start_aneg() = %d\n",
+					   err);
+		}
+	}
+
+	fman_get_pause_cfg(mac_dev, &rx_pause, &tx_pause);
+	err = fman_set_mac_active_pause(mac_dev, rx_pause, tx_pause);
+	if (err < 0)
+		netdev_err(net_dev, "set_mac_active_pause() = %d\n", err);
+
+	return err;
+}
+
+const struct ethtool_ops dpaa_ethtool_ops = {
+	.get_settings = dpaa_get_settings,
+	.set_settings = dpaa_set_settings,
+	.get_drvinfo = dpaa_get_drvinfo,
+	.get_msglevel = dpaa_get_msglevel,
+	.set_msglevel = dpaa_set_msglevel,
+	.nway_reset = dpaa_nway_reset,
+	.get_pauseparam = dpaa_get_pauseparam,
+	.set_pauseparam = dpaa_set_pauseparam,
+	.get_link = ethtool_op_get_link,
+};