1 files changed, 390 insertions, 0 deletions
diff --git a/drivers/net/ethernet/intel/i40evf/i40evf_ethtool.c b/drivers/net/ethernet/intel/i40evf/i40evf_ethtool.c
new file mode 100644
index 000000000000..b0b1f4bf5ac0
--- /dev/null
+++ b/drivers/net/ethernet/intel/i40evf/i40evf_ethtool.c
@@ -0,0 +1,390 @@
+/*******************************************************************************
+ *
+ * Intel Ethernet Controller XL710 Family Linux Virtual Function Driver
+ * Copyright(c) 2013 Intel Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ * The full GNU General Public License is included in this distribution in
+ * the file called "COPYING".
+ *
+ * Contact Information:
+ * e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
+ * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
+ *
+ ******************************************************************************/
+
+/* ethtool support for i40evf */
+#include "i40evf.h"
+
+#include <linux/uaccess.h>
+
+
+struct i40evf_stats {
+	char stat_string[ETH_GSTRING_LEN];
+	int stat_offset;
+};
+
+#define I40EVF_STAT(_name, _stat) { \
+	.stat_string = _name, \
+	.stat_offset = offsetof(struct i40evf_adapter, _stat) \
+}
+
+/* All stats are u64, so we don't need to track the size of the field. */
+static const struct i40evf_stats i40evf_gstrings_stats[] = {
+	I40EVF_STAT("rx_bytes", current_stats.rx_bytes),
+	I40EVF_STAT("rx_unicast", current_stats.rx_unicast),
+	I40EVF_STAT("rx_multicast", current_stats.rx_multicast),
+	I40EVF_STAT("rx_broadcast", current_stats.rx_broadcast),
+	I40EVF_STAT("rx_discards", current_stats.rx_discards),
+	I40EVF_STAT("rx_errors", current_stats.rx_errors),
+	I40EVF_STAT("rx_missed", current_stats.rx_missed),
+	I40EVF_STAT("rx_unknown_protocol", current_stats.rx_unknown_protocol),
+	I40EVF_STAT("tx_bytes", current_stats.tx_bytes),
+	I40EVF_STAT("tx_unicast", current_stats.tx_unicast),
+	I40EVF_STAT("tx_multicast", current_stats.tx_multicast),
+	I40EVF_STAT("tx_broadcast", current_stats.tx_broadcast),
+	I40EVF_STAT("tx_discards", current_stats.tx_discards),
+	I40EVF_STAT("tx_errors", current_stats.tx_errors),
+};
+
+#define I40EVF_GLOBAL_STATS_LEN ARRAY_SIZE(i40evf_gstrings_stats)
+#define I40EVF_QUEUE_STATS_LEN \
+	(((struct i40evf_adapter *) \
+		netdev_priv(netdev))->vsi_res->num_queue_pairs * 4)
+#define I40EVF_STATS_LEN (I40EVF_GLOBAL_STATS_LEN + I40EVF_QUEUE_STATS_LEN)
+
+/**
+ * i40evf_get_settings - Get Link Speed and Duplex settings
+ * @netdev: network interface device structure
+ * @ecmd: ethtool command
+ *
+ * Reports speed/duplex settings. Because this is a VF, we don't know what
+ * kind of link we really have, so we fake it.
+ **/
+static int i40evf_get_settings(struct net_device *netdev,
+			       struct ethtool_cmd *ecmd)
+{
+	/* In the future the VF will be able to query the PF for
+	 * some information - for now use a dummy value
+	 */
+	ecmd->supported = SUPPORTED_10000baseT_Full;
+	ecmd->autoneg = AUTONEG_DISABLE;
+	ecmd->transceiver = XCVR_DUMMY1;
+	ecmd->port = PORT_NONE;
+
+	return 0;
+}
+
+/**
+ * i40evf_get_sset_count - Get length of string set
+ * @netdev: network interface device structure
+ * @sset: id of string set
+ *
+ * Reports size of string table. This driver only supports
+ * strings for statistics.
+ **/
+static int i40evf_get_sset_count(struct net_device *netdev, int sset)
+{
+	if (sset == ETH_SS_STATS)
+		return I40EVF_STATS_LEN;
+	else
+		return -ENOTSUPP;
+}
+
+/**
+ * i40evf_get_ethtool_stats - report device statistics
+ * @netdev: network interface device structure
+ * @stats: ethtool statistics structure
+ * @data: pointer to data buffer
+ *
+ * All statistics are added to the data buffer as an array of u64.
+ **/
+static void i40evf_get_ethtool_stats(struct net_device *netdev,
+				     struct ethtool_stats *stats, u64 *data)
+{
+	struct i40evf_adapter *adapter = netdev_priv(netdev);
+	int i, j;
+	char *p;
+
+	for (i = 0; i < I40EVF_GLOBAL_STATS_LEN; i++) {
+		p = (char *)adapter + i40evf_gstrings_stats[i].stat_offset;
+		data[i] =  *(u64 *)p;
+	}
+	for (j = 0; j < adapter->vsi_res->num_queue_pairs; j++) {
+		data[i++] = adapter->tx_rings[j]->stats.packets;
+		data[i++] = adapter->tx_rings[j]->stats.bytes;
+	}
+	for (j = 0; j < adapter->vsi_res->num_queue_pairs; j++) {
+		data[i++] = adapter->rx_rings[j]->stats.packets;
+		data[i++] = adapter->rx_rings[j]->stats.bytes;
+	}
+}
+
+/**
+ * i40evf_get_strings - Get string set
+ * @netdev: network interface device structure
+ * @sset: id of string set
+ * @data: buffer for string data
+ *
+ * Builds stats string table.
+ **/
+static void i40evf_get_strings(struct net_device *netdev, u32 sset, u8 *data)
+{
+	struct i40evf_adapter *adapter = netdev_priv(netdev);
+	u8 *p = data;
+	int i;
+
+	if (sset == ETH_SS_STATS) {
+		for (i = 0; i < I40EVF_GLOBAL_STATS_LEN; i++) {
+			memcpy(p, i40evf_gstrings_stats[i].stat_string,
+			       ETH_GSTRING_LEN);
+			p += ETH_GSTRING_LEN;
+		}
+		for (i = 0; i < adapter->vsi_res->num_queue_pairs; i++) {
+			snprintf(p, ETH_GSTRING_LEN, "tx-%u.packets", i);
+			p += ETH_GSTRING_LEN;
+			snprintf(p, ETH_GSTRING_LEN, "tx-%u.bytes", i);
+			p += ETH_GSTRING_LEN;
+		}
+		for (i = 0; i < adapter->vsi_res->num_queue_pairs; i++) {
+			snprintf(p, ETH_GSTRING_LEN, "rx-%u.packets", i);
+			p += ETH_GSTRING_LEN;
+			snprintf(p, ETH_GSTRING_LEN, "rx-%u.bytes", i);
+			p += ETH_GSTRING_LEN;
+		}
+	}
+}
+
+/**
+ * i40evf_get_msglevel - Get debug message level
+ * @netdev: network interface device structure
+ *
+ * Returns current debug message level.
+ **/
+static u32 i40evf_get_msglevel(struct net_device *netdev)
+{
+	struct i40evf_adapter *adapter = netdev_priv(netdev);
+	return adapter->msg_enable;
+}
+
+/**
+ * i40evf_get_msglevel - Set debug message level
+ * @netdev: network interface device structure
+ * @data: message level
+ *
+ * Set current debug message level. Higher values cause the driver to
+ * be noisier.
+ **/
+static void i40evf_set_msglevel(struct net_device *netdev, u32 data)
+{
+	struct i40evf_adapter *adapter = netdev_priv(netdev);
+	adapter->msg_enable = data;
+}
+
+/**
+ * i40evf_get_drvinto - Get driver info
+ * @netdev: network interface device structure
+ * @drvinfo: ethool driver info structure
+ *
+ * Returns information about the driver and device for display to the user.
+ **/
+static void i40evf_get_drvinfo(struct net_device *netdev,
+			       struct ethtool_drvinfo *drvinfo)
+{
+	struct i40evf_adapter *adapter = netdev_priv(netdev);
+
+	strlcpy(drvinfo->driver, i40evf_driver_name, 32);
+	strlcpy(drvinfo->version, i40evf_driver_version, 32);
+
+	strlcpy(drvinfo->bus_info, pci_name(adapter->pdev), 32);
+}
+
+/**
+ * i40evf_get_ringparam - Get ring parameters
+ * @netdev: network interface device structure
+ * @ring: ethtool ringparam structure
+ *
+ * Returns current ring parameters. TX and RX rings are reported separately,
+ * but the number of rings is not reported.
+ **/
+static void i40evf_get_ringparam(struct net_device *netdev,
+				  struct ethtool_ringparam *ring)
+{
+	struct i40evf_adapter *adapter = netdev_priv(netdev);
+	struct i40e_ring *tx_ring = adapter->tx_rings[0];
+	struct i40e_ring *rx_ring = adapter->rx_rings[0];
+
+	ring->rx_max_pending = I40EVF_MAX_RXD;
+	ring->tx_max_pending = I40EVF_MAX_TXD;
+	ring->rx_pending = rx_ring->count;
+	ring->tx_pending = tx_ring->count;
+}
+
+/**
+ * i40evf_set_ringparam - Set ring parameters
+ * @netdev: network interface device structure
+ * @ring: ethtool ringparam structure
+ *
+ * Sets ring parameters. TX and RX rings are controlled separately, but the
+ * number of rings is not specified, so all rings get the same settings.
+ **/
+static int i40evf_set_ringparam(struct net_device *netdev,
+				struct ethtool_ringparam *ring)
+{
+	struct i40evf_adapter *adapter = netdev_priv(netdev);
+	u32 new_rx_count, new_tx_count;
+
+	if ((ring->rx_mini_pending) || (ring->rx_jumbo_pending))
+		return -EINVAL;
+
+	new_tx_count = clamp_t(u32, ring->tx_pending,
+			       I40EVF_MIN_TXD,
+			       I40EVF_MAX_TXD);
+	new_tx_count = ALIGN(new_tx_count, I40EVF_REQ_DESCRIPTOR_MULTIPLE);
+
+	new_rx_count = clamp_t(u32, ring->rx_pending,
+			       I40EVF_MIN_RXD,
+			       I40EVF_MAX_RXD);
+	new_rx_count = ALIGN(new_rx_count, I40EVF_REQ_DESCRIPTOR_MULTIPLE);
+
+	/* if nothing to do return success */
+	if ((new_tx_count == adapter->txd_count) &&
+	    (new_rx_count == adapter->rxd_count))
+		return 0;
+
+	adapter->txd_count = new_tx_count;
+	adapter->rxd_count = new_rx_count;
+
+	if (netif_running(netdev))
+		i40evf_reinit_locked(adapter);
+	return 0;
+}
+
+/**
+ * i40evf_get_coalesce - Get interrupt coalescing settings
+ * @netdev: network interface device structure
+ * @ec: ethtool coalesce structure
+ *
+ * Returns current coalescing settings. This is referred to elsewhere in the
+ * driver as Interrupt Throttle Rate, as this is how the hardware describes
+ * this functionality.
+ **/
+static int i40evf_get_coalesce(struct net_device *netdev,
+			     struct ethtool_coalesce *ec)
+{
+	struct i40evf_adapter *adapter = netdev_priv(netdev);
+	struct i40e_vsi *vsi = &adapter->vsi;
+
+	ec->tx_max_coalesced_frames = vsi->work_limit;
+	ec->rx_max_coalesced_frames = vsi->work_limit;
+
+	if (ITR_IS_DYNAMIC(vsi->rx_itr_setting))
+		ec->rx_coalesce_usecs = 1;
+	else
+		ec->rx_coalesce_usecs = vsi->rx_itr_setting;
+
+	if (ITR_IS_DYNAMIC(vsi->tx_itr_setting))
+		ec->tx_coalesce_usecs = 1;
+	else
+		ec->tx_coalesce_usecs = vsi->tx_itr_setting;
+
+	return 0;
+}
+
+/**
+ * i40evf_set_coalesce - Set interrupt coalescing settings
+ * @netdev: network interface device structure
+ * @ec: ethtool coalesce structure
+ *
+ * Change current coalescing settings.
+ **/
+static int i40evf_set_coalesce(struct net_device *netdev,
+			     struct ethtool_coalesce *ec)
+{
+	struct i40evf_adapter *adapter = netdev_priv(netdev);
+	struct i40e_hw *hw = &adapter->hw;
+	struct i40e_vsi *vsi = &adapter->vsi;
+	struct i40e_q_vector *q_vector;
+	int i;
+
+	if (ec->tx_max_coalesced_frames || ec->rx_max_coalesced_frames)
+		vsi->work_limit = ec->tx_max_coalesced_frames;
+
+	switch (ec->rx_coalesce_usecs) {
+	case 0:
+		vsi->rx_itr_setting = 0;
+		break;
+	case 1:
+		vsi->rx_itr_setting = (I40E_ITR_DYNAMIC
+				       | ITR_REG_TO_USEC(I40E_ITR_RX_DEF));
+		break;
+	default:
+		if ((ec->rx_coalesce_usecs < (I40E_MIN_ITR << 1)) ||
+		    (ec->rx_coalesce_usecs > (I40E_MAX_ITR << 1)))
+			return -EINVAL;
+		vsi->rx_itr_setting = ec->rx_coalesce_usecs;
+		break;
+	}
+
+	switch (ec->tx_coalesce_usecs) {
+	case 0:
+		vsi->tx_itr_setting = 0;
+		break;
+	case 1:
+		vsi->tx_itr_setting = (I40E_ITR_DYNAMIC
+				       | ITR_REG_TO_USEC(I40E_ITR_TX_DEF));
+		break;
+	default:
+		if ((ec->tx_coalesce_usecs < (I40E_MIN_ITR << 1)) ||
+		    (ec->tx_coalesce_usecs > (I40E_MAX_ITR << 1)))
+			return -EINVAL;
+		vsi->tx_itr_setting = ec->tx_coalesce_usecs;
+		break;
+	}
+
+	for (i = 0; i < adapter->num_msix_vectors - NONQ_VECS; i++) {
+		q_vector = adapter->q_vector[i];
+		q_vector->rx.itr = ITR_TO_REG(vsi->rx_itr_setting);
+		wr32(hw, I40E_VFINT_ITRN1(0, i), q_vector->rx.itr);
+		q_vector->tx.itr = ITR_TO_REG(vsi->tx_itr_setting);
+		wr32(hw, I40E_VFINT_ITRN1(1, i), q_vector->tx.itr);
+		i40e_flush(hw);
+	}
+
+	return 0;
+}
+
+static struct ethtool_ops i40evf_ethtool_ops = {
+	.get_settings		= i40evf_get_settings,
+	.get_drvinfo		= i40evf_get_drvinfo,
+	.get_link		= ethtool_op_get_link,
+	.get_ringparam		= i40evf_get_ringparam,
+	.set_ringparam		= i40evf_set_ringparam,
+	.get_strings		= i40evf_get_strings,
+	.get_ethtool_stats	= i40evf_get_ethtool_stats,
+	.get_sset_count		= i40evf_get_sset_count,
+	.get_msglevel		= i40evf_get_msglevel,
+	.set_msglevel		= i40evf_set_msglevel,
+	.get_coalesce		= i40evf_get_coalesce,
+	.set_coalesce		= i40evf_set_coalesce,
+};
+
+/**
+ * i40evf_set_ethtool_ops - Initialize ethtool ops struct
+ * @netdev: network interface device structure
+ *
+ * Sets ethtool ops struct in our netdev so that ethtool can call
+ * our functions.
+ **/
+void i40evf_set_ethtool_ops(struct net_device *netdev)
+{
+	SET_ETHTOOL_OPS(netdev, &i40evf_ethtool_ops);
+}