Adding upstream version 5.10.209.upstream/5.10.209upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 1105 insertions, 0 deletions

diff --git a/drivers/net/ethernet/intel/iavf/iavf_ethtool.c b/drivers/net/ethernet/intel/iavf/iavf_ethtool.c
new file mode 100644
index 000000000..05cd70579
--- /dev/null
+++ b/drivers/net/ethernet/intel/iavf/iavf_ethtool.c
@@ -0,0 +1,1105 @@
+// SPDX-License-Identifier: GPL-2.0
+/* Copyright(c) 2013 - 2018 Intel Corporation. */
+
+/* ethtool support for iavf */
+#include "iavf.h"
+
+#include <linux/uaccess.h>
+
+/* ethtool statistics helpers */
+
+/**
+ * struct iavf_stats - definition for an ethtool statistic
+ * @stat_string: statistic name to display in ethtool -S output
+ * @sizeof_stat: the sizeof() the stat, must be no greater than sizeof(u64)
+ * @stat_offset: offsetof() the stat from a base pointer
+ *
+ * This structure defines a statistic to be added to the ethtool stats buffer.
+ * It defines a statistic as offset from a common base pointer. Stats should
+ * be defined in constant arrays using the IAVF_STAT macro, with every element
+ * of the array using the same _type for calculating the sizeof_stat and
+ * stat_offset.
+ *
+ * The @sizeof_stat is expected to be sizeof(u8), sizeof(u16), sizeof(u32) or
+ * sizeof(u64). Other sizes are not expected and will produce a WARN_ONCE from
+ * the iavf_add_ethtool_stat() helper function.
+ *
+ * The @stat_string is interpreted as a format string, allowing formatted
+ * values to be inserted while looping over multiple structures for a given
+ * statistics array. Thus, every statistic string in an array should have the
+ * same type and number of format specifiers, to be formatted by variadic
+ * arguments to the iavf_add_stat_string() helper function.
+ **/
+struct iavf_stats {
+	char stat_string[ETH_GSTRING_LEN];
+	int sizeof_stat;
+	int stat_offset;
+};
+
+/* Helper macro to define an iavf_stat structure with proper size and type.
+ * Use this when defining constant statistics arrays. Note that @_type expects
+ * only a type name and is used multiple times.
+ */
+#define IAVF_STAT(_type, _name, _stat) { \
+	.stat_string = _name, \
+	.sizeof_stat = sizeof_field(_type, _stat), \
+	.stat_offset = offsetof(_type, _stat) \
+}
+
+/* Helper macro for defining some statistics related to queues */
+#define IAVF_QUEUE_STAT(_name, _stat) \
+	IAVF_STAT(struct iavf_ring, _name, _stat)
+
+/* Stats associated with a Tx or Rx ring */
+static const struct iavf_stats iavf_gstrings_queue_stats[] = {
+	IAVF_QUEUE_STAT("%s-%u.packets", stats.packets),
+	IAVF_QUEUE_STAT("%s-%u.bytes", stats.bytes),
+};
+
+/**
+ * iavf_add_one_ethtool_stat - copy the stat into the supplied buffer
+ * @data: location to store the stat value
+ * @pointer: basis for where to copy from
+ * @stat: the stat definition
+ *
+ * Copies the stat data defined by the pointer and stat structure pair into
+ * the memory supplied as data. Used to implement iavf_add_ethtool_stats and
+ * iavf_add_queue_stats. If the pointer is null, data will be zero'd.
+ */
+static void
+iavf_add_one_ethtool_stat(u64 *data, void *pointer,
+			  const struct iavf_stats *stat)
+{
+	char *p;
+
+	if (!pointer) {
+		/* ensure that the ethtool data buffer is zero'd for any stats
+		 * which don't have a valid pointer.
+		 */
+		*data = 0;
+		return;
+	}
+
+	p = (char *)pointer + stat->stat_offset;
+	switch (stat->sizeof_stat) {
+	case sizeof(u64):
+		*data = *((u64 *)p);
+		break;
+	case sizeof(u32):
+		*data = *((u32 *)p);
+		break;
+	case sizeof(u16):
+		*data = *((u16 *)p);
+		break;
+	case sizeof(u8):
+		*data = *((u8 *)p);
+		break;
+	default:
+		WARN_ONCE(1, "unexpected stat size for %s",
+			  stat->stat_string);
+		*data = 0;
+	}
+}
+
+/**
+ * __iavf_add_ethtool_stats - copy stats into the ethtool supplied buffer
+ * @data: ethtool stats buffer
+ * @pointer: location to copy stats from
+ * @stats: array of stats to copy
+ * @size: the size of the stats definition
+ *
+ * Copy the stats defined by the stats array using the pointer as a base into
+ * the data buffer supplied by ethtool. Updates the data pointer to point to
+ * the next empty location for successive calls to __iavf_add_ethtool_stats.
+ * If pointer is null, set the data values to zero and update the pointer to
+ * skip these stats.
+ **/
+static void
+__iavf_add_ethtool_stats(u64 **data, void *pointer,
+			 const struct iavf_stats stats[],
+			 const unsigned int size)
+{
+	unsigned int i;
+
+	for (i = 0; i < size; i++)
+		iavf_add_one_ethtool_stat((*data)++, pointer, &stats[i]);
+}
+
+/**
+ * iavf_add_ethtool_stats - copy stats into ethtool supplied buffer
+ * @data: ethtool stats buffer
+ * @pointer: location where stats are stored
+ * @stats: static const array of stat definitions
+ *
+ * Macro to ease the use of __iavf_add_ethtool_stats by taking a static
+ * constant stats array and passing the ARRAY_SIZE(). This avoids typos by
+ * ensuring that we pass the size associated with the given stats array.
+ *
+ * The parameter @stats is evaluated twice, so parameters with side effects
+ * should be avoided.
+ **/
+#define iavf_add_ethtool_stats(data, pointer, stats) \
+	__iavf_add_ethtool_stats(data, pointer, stats, ARRAY_SIZE(stats))
+
+/**
+ * iavf_add_queue_stats - copy queue statistics into supplied buffer
+ * @data: ethtool stats buffer
+ * @ring: the ring to copy
+ *
+ * Queue statistics must be copied while protected by
+ * u64_stats_fetch_begin_irq, so we can't directly use iavf_add_ethtool_stats.
+ * Assumes that queue stats are defined in iavf_gstrings_queue_stats. If the
+ * ring pointer is null, zero out the queue stat values and update the data
+ * pointer. Otherwise safely copy the stats from the ring into the supplied
+ * buffer and update the data pointer when finished.
+ *
+ * This function expects to be called while under rcu_read_lock().
+ **/
+static void
+iavf_add_queue_stats(u64 **data, struct iavf_ring *ring)
+{
+	const unsigned int size = ARRAY_SIZE(iavf_gstrings_queue_stats);
+	const struct iavf_stats *stats = iavf_gstrings_queue_stats;
+	unsigned int start;
+	unsigned int i;
+
+	/* To avoid invalid statistics values, ensure that we keep retrying
+	 * the copy until we get a consistent value according to
+	 * u64_stats_fetch_retry_irq. But first, make sure our ring is
+	 * non-null before attempting to access its syncp.
+	 */
+	do {
+		start = !ring ? 0 : u64_stats_fetch_begin_irq(&ring->syncp);
+		for (i = 0; i < size; i++)
+			iavf_add_one_ethtool_stat(&(*data)[i], ring, &stats[i]);
+	} while (ring && u64_stats_fetch_retry_irq(&ring->syncp, start));
+
+	/* Once we successfully copy the stats in, update the data pointer */
+	*data += size;
+}
+
+/**
+ * __iavf_add_stat_strings - copy stat strings into ethtool buffer
+ * @p: ethtool supplied buffer
+ * @stats: stat definitions array
+ * @size: size of the stats array
+ *
+ * Format and copy the strings described by stats into the buffer pointed at
+ * by p.
+ **/
+static void __iavf_add_stat_strings(u8 **p, const struct iavf_stats stats[],
+				    const unsigned int size, ...)
+{
+	unsigned int i;
+
+	for (i = 0; i < size; i++) {
+		va_list args;
+
+		va_start(args, size);
+		vsnprintf(*p, ETH_GSTRING_LEN, stats[i].stat_string, args);
+		*p += ETH_GSTRING_LEN;
+		va_end(args);
+	}
+}
+
+/**
+ * iavf_add_stat_strings - copy stat strings into ethtool buffer
+ * @p: ethtool supplied buffer
+ * @stats: stat definitions array
+ *
+ * Format and copy the strings described by the const static stats value into
+ * the buffer pointed at by p.
+ *
+ * The parameter @stats is evaluated twice, so parameters with side effects
+ * should be avoided. Additionally, stats must be an array such that
+ * ARRAY_SIZE can be called on it.
+ **/
+#define iavf_add_stat_strings(p, stats, ...) \
+	__iavf_add_stat_strings(p, stats, ARRAY_SIZE(stats), ## __VA_ARGS__)
+
+#define VF_STAT(_name, _stat) \
+	IAVF_STAT(struct iavf_adapter, _name, _stat)
+
+static const struct iavf_stats iavf_gstrings_stats[] = {
+	VF_STAT("rx_bytes", current_stats.rx_bytes),
+	VF_STAT("rx_unicast", current_stats.rx_unicast),
+	VF_STAT("rx_multicast", current_stats.rx_multicast),
+	VF_STAT("rx_broadcast", current_stats.rx_broadcast),
+	VF_STAT("rx_discards", current_stats.rx_discards),
+	VF_STAT("rx_unknown_protocol", current_stats.rx_unknown_protocol),
+	VF_STAT("tx_bytes", current_stats.tx_bytes),
+	VF_STAT("tx_unicast", current_stats.tx_unicast),
+	VF_STAT("tx_multicast", current_stats.tx_multicast),
+	VF_STAT("tx_broadcast", current_stats.tx_broadcast),
+	VF_STAT("tx_discards", current_stats.tx_discards),
+	VF_STAT("tx_errors", current_stats.tx_errors),
+};
+
+#define IAVF_STATS_LEN	ARRAY_SIZE(iavf_gstrings_stats)
+
+#define IAVF_QUEUE_STATS_LEN	ARRAY_SIZE(iavf_gstrings_queue_stats)
+
+/* For now we have one and only one private flag and it is only defined
+ * when we have support for the SKIP_CPU_SYNC DMA attribute.  Instead
+ * of leaving all this code sitting around empty we will strip it unless
+ * our one private flag is actually available.
+ */
+struct iavf_priv_flags {
+	char flag_string[ETH_GSTRING_LEN];
+	u32 flag;
+	bool read_only;
+};
+
+#define IAVF_PRIV_FLAG(_name, _flag, _read_only) { \
+	.flag_string = _name, \
+	.flag = _flag, \
+	.read_only = _read_only, \
+}
+
+static const struct iavf_priv_flags iavf_gstrings_priv_flags[] = {
+	IAVF_PRIV_FLAG("legacy-rx", IAVF_FLAG_LEGACY_RX, 0),
+};
+
+#define IAVF_PRIV_FLAGS_STR_LEN ARRAY_SIZE(iavf_gstrings_priv_flags)
+
+/**
+ * iavf_get_link_ksettings - Get Link Speed and Duplex settings
+ * @netdev: network interface device structure
+ * @cmd: 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 iavf_get_link_ksettings(struct net_device *netdev,
+				   struct ethtool_link_ksettings *cmd)
+{
+	struct iavf_adapter *adapter = netdev_priv(netdev);
+
+	ethtool_link_ksettings_zero_link_mode(cmd, supported);
+	cmd->base.autoneg = AUTONEG_DISABLE;
+	cmd->base.port = PORT_NONE;
+	cmd->base.duplex = DUPLEX_FULL;
+
+	if (ADV_LINK_SUPPORT(adapter)) {
+		if (adapter->link_speed_mbps &&
+		    adapter->link_speed_mbps < U32_MAX)
+			cmd->base.speed = adapter->link_speed_mbps;
+		else
+			cmd->base.speed = SPEED_UNKNOWN;
+
+		return 0;
+	}
+
+	switch (adapter->link_speed) {
+	case VIRTCHNL_LINK_SPEED_40GB:
+		cmd->base.speed = SPEED_40000;
+		break;
+	case VIRTCHNL_LINK_SPEED_25GB:
+		cmd->base.speed = SPEED_25000;
+		break;
+	case VIRTCHNL_LINK_SPEED_20GB:
+		cmd->base.speed = SPEED_20000;
+		break;
+	case VIRTCHNL_LINK_SPEED_10GB:
+		cmd->base.speed = SPEED_10000;
+		break;
+	case VIRTCHNL_LINK_SPEED_5GB:
+		cmd->base.speed = SPEED_5000;
+		break;
+	case VIRTCHNL_LINK_SPEED_2_5GB:
+		cmd->base.speed = SPEED_2500;
+		break;
+	case VIRTCHNL_LINK_SPEED_1GB:
+		cmd->base.speed = SPEED_1000;
+		break;
+	case VIRTCHNL_LINK_SPEED_100MB:
+		cmd->base.speed = SPEED_100;
+		break;
+	default:
+		break;
+	}
+
+	return 0;
+}
+
+/**
+ * iavf_get_sset_count - Get length of string set
+ * @netdev: network interface device structure
+ * @sset: id of string set
+ *
+ * Reports size of various string tables.
+ **/
+static int iavf_get_sset_count(struct net_device *netdev, int sset)
+{
+	if (sset == ETH_SS_STATS)
+		return IAVF_STATS_LEN +
+			(IAVF_QUEUE_STATS_LEN * 2 * IAVF_MAX_REQ_QUEUES);
+	else if (sset == ETH_SS_PRIV_FLAGS)
+		return IAVF_PRIV_FLAGS_STR_LEN;
+	else
+		return -EINVAL;
+}
+
+/**
+ * iavf_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 iavf_get_ethtool_stats(struct net_device *netdev,
+				   struct ethtool_stats *stats, u64 *data)
+{
+	struct iavf_adapter *adapter = netdev_priv(netdev);
+	unsigned int i;
+
+	iavf_add_ethtool_stats(&data, adapter, iavf_gstrings_stats);
+
+	rcu_read_lock();
+	for (i = 0; i < IAVF_MAX_REQ_QUEUES; i++) {
+		struct iavf_ring *ring;
+
+		/* Avoid accessing un-allocated queues */
+		ring = (i < adapter->num_active_queues ?
+			&adapter->tx_rings[i] : NULL);
+		iavf_add_queue_stats(&data, ring);
+
+		/* Avoid accessing un-allocated queues */
+		ring = (i < adapter->num_active_queues ?
+			&adapter->rx_rings[i] : NULL);
+		iavf_add_queue_stats(&data, ring);
+	}
+	rcu_read_unlock();
+}
+
+/**
+ * iavf_get_priv_flag_strings - Get private flag strings
+ * @netdev: network interface device structure
+ * @data: buffer for string data
+ *
+ * Builds the private flags string table
+ **/
+static void iavf_get_priv_flag_strings(struct net_device *netdev, u8 *data)
+{
+	unsigned int i;
+
+	for (i = 0; i < IAVF_PRIV_FLAGS_STR_LEN; i++) {
+		snprintf(data, ETH_GSTRING_LEN, "%s",
+			 iavf_gstrings_priv_flags[i].flag_string);
+		data += ETH_GSTRING_LEN;
+	}
+}
+
+/**
+ * iavf_get_stat_strings - Get stat strings
+ * @netdev: network interface device structure
+ * @data: buffer for string data
+ *
+ * Builds the statistics string table
+ **/
+static void iavf_get_stat_strings(struct net_device *netdev, u8 *data)
+{
+	unsigned int i;
+
+	iavf_add_stat_strings(&data, iavf_gstrings_stats);
+
+	/* Queues are always allocated in pairs, so we just use num_tx_queues
+	 * for both Tx and Rx queues.
+	 */
+	for (i = 0; i < netdev->num_tx_queues; i++) {
+		iavf_add_stat_strings(&data, iavf_gstrings_queue_stats,
+				      "tx", i);
+		iavf_add_stat_strings(&data, iavf_gstrings_queue_stats,
+				      "rx", i);
+	}
+}
+
+/**
+ * iavf_get_strings - Get string set
+ * @netdev: network interface device structure
+ * @sset: id of string set
+ * @data: buffer for string data
+ *
+ * Builds string tables for various string sets
+ **/
+static void iavf_get_strings(struct net_device *netdev, u32 sset, u8 *data)
+{
+	switch (sset) {
+	case ETH_SS_STATS:
+		iavf_get_stat_strings(netdev, data);
+		break;
+	case ETH_SS_PRIV_FLAGS:
+		iavf_get_priv_flag_strings(netdev, data);
+		break;
+	default:
+		break;
+	}
+}
+
+/**
+ * iavf_get_priv_flags - report device private flags
+ * @netdev: network interface device structure
+ *
+ * The get string set count and the string set should be matched for each
+ * flag returned.  Add new strings for each flag to the iavf_gstrings_priv_flags
+ * array.
+ *
+ * Returns a u32 bitmap of flags.
+ **/
+static u32 iavf_get_priv_flags(struct net_device *netdev)
+{
+	struct iavf_adapter *adapter = netdev_priv(netdev);
+	u32 i, ret_flags = 0;
+
+	for (i = 0; i < IAVF_PRIV_FLAGS_STR_LEN; i++) {
+		const struct iavf_priv_flags *priv_flags;
+
+		priv_flags = &iavf_gstrings_priv_flags[i];
+
+		if (priv_flags->flag & adapter->flags)
+			ret_flags |= BIT(i);
+	}
+
+	return ret_flags;
+}
+
+/**
+ * iavf_set_priv_flags - set private flags
+ * @netdev: network interface device structure
+ * @flags: bit flags to be set
+ **/
+static int iavf_set_priv_flags(struct net_device *netdev, u32 flags)
+{
+	struct iavf_adapter *adapter = netdev_priv(netdev);
+	u32 orig_flags, new_flags, changed_flags;
+	u32 i;
+
+	orig_flags = READ_ONCE(adapter->flags);
+	new_flags = orig_flags;
+
+	for (i = 0; i < IAVF_PRIV_FLAGS_STR_LEN; i++) {
+		const struct iavf_priv_flags *priv_flags;
+
+		priv_flags = &iavf_gstrings_priv_flags[i];
+
+		if (flags & BIT(i))
+			new_flags |= priv_flags->flag;
+		else
+			new_flags &= ~(priv_flags->flag);
+
+		if (priv_flags->read_only &&
+		    ((orig_flags ^ new_flags) & ~BIT(i)))
+			return -EOPNOTSUPP;
+	}
+
+	/* Before we finalize any flag changes, any checks which we need to
+	 * perform to determine if the new flags will be supported should go
+	 * here...
+	 */
+
+	/* Compare and exchange the new flags into place. If we failed, that
+	 * is if cmpxchg returns anything but the old value, this means
+	 * something else must have modified the flags variable since we
+	 * copied it. We'll just punt with an error and log something in the
+	 * message buffer.
+	 */
+	if (cmpxchg(&adapter->flags, orig_flags, new_flags) != orig_flags) {
+		dev_warn(&adapter->pdev->dev,
+			 "Unable to update adapter->flags as it was modified by another thread...\n");
+		return -EAGAIN;
+	}
+
+	changed_flags = orig_flags ^ new_flags;
+
+	/* Process any additional changes needed as a result of flag changes.
+	 * The changed_flags value reflects the list of bits that were changed
+	 * in the code above.
+	 */
+
+	/* issue a reset to force legacy-rx change to take effect */
+	if (changed_flags & IAVF_FLAG_LEGACY_RX) {
+		if (netif_running(netdev)) {
+			adapter->flags |= IAVF_FLAG_RESET_NEEDED;
+			queue_work(iavf_wq, &adapter->reset_task);
+		}
+	}
+
+	return 0;
+}
+
+/**
+ * iavf_get_msglevel - Get debug message level
+ * @netdev: network interface device structure
+ *
+ * Returns current debug message level.
+ **/
+static u32 iavf_get_msglevel(struct net_device *netdev)
+{
+	struct iavf_adapter *adapter = netdev_priv(netdev);
+
+	return adapter->msg_enable;
+}
+
+/**
+ * iavf_set_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 iavf_set_msglevel(struct net_device *netdev, u32 data)
+{
+	struct iavf_adapter *adapter = netdev_priv(netdev);
+
+	if (IAVF_DEBUG_USER & data)
+		adapter->hw.debug_mask = data;
+	adapter->msg_enable = data;
+}
+
+/**
+ * iavf_get_drvinfo - 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 iavf_get_drvinfo(struct net_device *netdev,
+			     struct ethtool_drvinfo *drvinfo)
+{
+	struct iavf_adapter *adapter = netdev_priv(netdev);
+
+	strlcpy(drvinfo->driver, iavf_driver_name, 32);
+	strlcpy(drvinfo->fw_version, "N/A", 4);
+	strlcpy(drvinfo->bus_info, pci_name(adapter->pdev), 32);
+	drvinfo->n_priv_flags = IAVF_PRIV_FLAGS_STR_LEN;
+}
+
+/**
+ * iavf_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 iavf_get_ringparam(struct net_device *netdev,
+			       struct ethtool_ringparam *ring)
+{
+	struct iavf_adapter *adapter = netdev_priv(netdev);
+
+	ring->rx_max_pending = IAVF_MAX_RXD;
+	ring->tx_max_pending = IAVF_MAX_TXD;
+	ring->rx_pending = adapter->rx_desc_count;
+	ring->tx_pending = adapter->tx_desc_count;
+}
+
+/**
+ * iavf_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 iavf_set_ringparam(struct net_device *netdev,
+			      struct ethtool_ringparam *ring)
+{
+	struct iavf_adapter *adapter = netdev_priv(netdev);
+	u32 new_rx_count, new_tx_count;
+
+	if ((ring->rx_mini_pending) || (ring->rx_jumbo_pending))
+		return -EINVAL;
+
+	if (ring->tx_pending > IAVF_MAX_TXD ||
+	    ring->tx_pending < IAVF_MIN_TXD ||
+	    ring->rx_pending > IAVF_MAX_RXD ||
+	    ring->rx_pending < IAVF_MIN_RXD) {
+		netdev_err(netdev, "Descriptors requested (Tx: %d / Rx: %d) out of range [%d-%d] (increment %d)\n",
+			   ring->tx_pending, ring->rx_pending, IAVF_MIN_TXD,
+			   IAVF_MAX_RXD, IAVF_REQ_DESCRIPTOR_MULTIPLE);
+		return -EINVAL;
+	}
+
+	new_tx_count = ALIGN(ring->tx_pending, IAVF_REQ_DESCRIPTOR_MULTIPLE);
+	if (new_tx_count != ring->tx_pending)
+		netdev_info(netdev, "Requested Tx descriptor count rounded up to %d\n",
+			    new_tx_count);
+
+	new_rx_count = ALIGN(ring->rx_pending, IAVF_REQ_DESCRIPTOR_MULTIPLE);
+	if (new_rx_count != ring->rx_pending)
+		netdev_info(netdev, "Requested Rx descriptor count rounded up to %d\n",
+			    new_rx_count);
+
+	/* if nothing to do return success */
+	if ((new_tx_count == adapter->tx_desc_count) &&
+	    (new_rx_count == adapter->rx_desc_count)) {
+		netdev_dbg(netdev, "Nothing to change, descriptor count is same as requested\n");
+		return 0;
+	}
+
+	if (new_tx_count != adapter->tx_desc_count) {
+		netdev_dbg(netdev, "Changing Tx descriptor count from %d to %d\n",
+			   adapter->tx_desc_count, new_tx_count);
+		adapter->tx_desc_count = new_tx_count;
+	}
+
+	if (new_rx_count != adapter->rx_desc_count) {
+		netdev_dbg(netdev, "Changing Rx descriptor count from %d to %d\n",
+			   adapter->rx_desc_count, new_rx_count);
+		adapter->rx_desc_count = new_rx_count;
+	}
+
+	if (netif_running(netdev)) {
+		adapter->flags |= IAVF_FLAG_RESET_NEEDED;
+		queue_work(iavf_wq, &adapter->reset_task);
+	}
+
+	return 0;
+}
+
+/**
+ * __iavf_get_coalesce - get per-queue coalesce settings
+ * @netdev: the netdev to check
+ * @ec: ethtool coalesce data structure
+ * @queue: which queue to pick
+ *
+ * Gets the per-queue settings for coalescence. Specifically Rx and Tx usecs
+ * are per queue. If queue is <0 then we default to queue 0 as the
+ * representative value.
+ **/
+static int __iavf_get_coalesce(struct net_device *netdev,
+			       struct ethtool_coalesce *ec, int queue)
+{
+	struct iavf_adapter *adapter = netdev_priv(netdev);
+	struct iavf_vsi *vsi = &adapter->vsi;
+	struct iavf_ring *rx_ring, *tx_ring;
+
+	ec->tx_max_coalesced_frames = vsi->work_limit;
+	ec->rx_max_coalesced_frames = vsi->work_limit;
+
+	/* Rx and Tx usecs per queue value. If user doesn't specify the
+	 * queue, return queue 0's value to represent.
+	 */
+	if (queue < 0)
+		queue = 0;
+	else if (queue >= adapter->num_active_queues)
+		return -EINVAL;
+
+	rx_ring = &adapter->rx_rings[queue];
+	tx_ring = &adapter->tx_rings[queue];
+
+	if (ITR_IS_DYNAMIC(rx_ring->itr_setting))
+		ec->use_adaptive_rx_coalesce = 1;
+
+	if (ITR_IS_DYNAMIC(tx_ring->itr_setting))
+		ec->use_adaptive_tx_coalesce = 1;
+
+	ec->rx_coalesce_usecs = rx_ring->itr_setting & ~IAVF_ITR_DYNAMIC;
+	ec->tx_coalesce_usecs = tx_ring->itr_setting & ~IAVF_ITR_DYNAMIC;
+
+	return 0;
+}
+
+/**
+ * iavf_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. Note that if per-queue settings have been modified this
+ * only represents the settings of queue 0.
+ **/
+static int iavf_get_coalesce(struct net_device *netdev,
+			     struct ethtool_coalesce *ec)
+{
+	return __iavf_get_coalesce(netdev, ec, -1);
+}
+
+/**
+ * iavf_get_per_queue_coalesce - get coalesce values for specific queue
+ * @netdev: netdev to read
+ * @ec: coalesce settings from ethtool
+ * @queue: the queue to read
+ *
+ * Read specific queue's coalesce settings.
+ **/
+static int iavf_get_per_queue_coalesce(struct net_device *netdev, u32 queue,
+				       struct ethtool_coalesce *ec)
+{
+	return __iavf_get_coalesce(netdev, ec, queue);
+}
+
+/**
+ * iavf_set_itr_per_queue - set ITR values for specific queue
+ * @adapter: the VF adapter struct to set values for
+ * @ec: coalesce settings from ethtool
+ * @queue: the queue to modify
+ *
+ * Change the ITR settings for a specific queue.
+ **/
+static int iavf_set_itr_per_queue(struct iavf_adapter *adapter,
+				  struct ethtool_coalesce *ec, int queue)
+{
+	struct iavf_ring *rx_ring = &adapter->rx_rings[queue];
+	struct iavf_ring *tx_ring = &adapter->tx_rings[queue];
+	struct iavf_q_vector *q_vector;
+	u16 itr_setting;
+
+	itr_setting = rx_ring->itr_setting & ~IAVF_ITR_DYNAMIC;
+
+	if (ec->rx_coalesce_usecs != itr_setting &&
+	    ec->use_adaptive_rx_coalesce) {
+		netif_info(adapter, drv, adapter->netdev,
+			   "Rx interrupt throttling cannot be changed if adaptive-rx is enabled\n");
+		return -EINVAL;
+	}
+
+	itr_setting = tx_ring->itr_setting & ~IAVF_ITR_DYNAMIC;
+
+	if (ec->tx_coalesce_usecs != itr_setting &&
+	    ec->use_adaptive_tx_coalesce) {
+		netif_info(adapter, drv, adapter->netdev,
+			   "Tx interrupt throttling cannot be changed if adaptive-tx is enabled\n");
+		return -EINVAL;
+	}
+
+	rx_ring->itr_setting = ITR_REG_ALIGN(ec->rx_coalesce_usecs);
+	tx_ring->itr_setting = ITR_REG_ALIGN(ec->tx_coalesce_usecs);
+
+	rx_ring->itr_setting |= IAVF_ITR_DYNAMIC;
+	if (!ec->use_adaptive_rx_coalesce)
+		rx_ring->itr_setting ^= IAVF_ITR_DYNAMIC;
+
+	tx_ring->itr_setting |= IAVF_ITR_DYNAMIC;
+	if (!ec->use_adaptive_tx_coalesce)
+		tx_ring->itr_setting ^= IAVF_ITR_DYNAMIC;
+
+	q_vector = rx_ring->q_vector;
+	q_vector->rx.target_itr = ITR_TO_REG(rx_ring->itr_setting);
+
+	q_vector = tx_ring->q_vector;
+	q_vector->tx.target_itr = ITR_TO_REG(tx_ring->itr_setting);
+
+	/* The interrupt handler itself will take care of programming
+	 * the Tx and Rx ITR values based on the values we have entered
+	 * into the q_vector, no need to write the values now.
+	 */
+	return 0;
+}
+
+/**
+ * __iavf_set_coalesce - set coalesce settings for particular queue
+ * @netdev: the netdev to change
+ * @ec: ethtool coalesce settings
+ * @queue: the queue to change
+ *
+ * Sets the coalesce settings for a particular queue.
+ **/
+static int __iavf_set_coalesce(struct net_device *netdev,
+			       struct ethtool_coalesce *ec, int queue)
+{
+	struct iavf_adapter *adapter = netdev_priv(netdev);
+	struct iavf_vsi *vsi = &adapter->vsi;
+	int i;
+
+	if (ec->tx_max_coalesced_frames_irq || ec->rx_max_coalesced_frames_irq)
+		vsi->work_limit = ec->tx_max_coalesced_frames_irq;
+
+	if (ec->rx_coalesce_usecs == 0) {
+		if (ec->use_adaptive_rx_coalesce)
+			netif_info(adapter, drv, netdev, "rx-usecs=0, need to disable adaptive-rx for a complete disable\n");
+	} else if ((ec->rx_coalesce_usecs < IAVF_MIN_ITR) ||
+		   (ec->rx_coalesce_usecs > IAVF_MAX_ITR)) {
+		netif_info(adapter, drv, netdev, "Invalid value, rx-usecs range is 0-8160\n");
+		return -EINVAL;
+	} else if (ec->tx_coalesce_usecs == 0) {
+		if (ec->use_adaptive_tx_coalesce)
+			netif_info(adapter, drv, netdev, "tx-usecs=0, need to disable adaptive-tx for a complete disable\n");
+	} else if ((ec->tx_coalesce_usecs < IAVF_MIN_ITR) ||
+		   (ec->tx_coalesce_usecs > IAVF_MAX_ITR)) {
+		netif_info(adapter, drv, netdev, "Invalid value, tx-usecs range is 0-8160\n");
+		return -EINVAL;
+	}
+
+	/* Rx and Tx usecs has per queue value. If user doesn't specify the
+	 * queue, apply to all queues.
+	 */
+	if (queue < 0) {
+		for (i = 0; i < adapter->num_active_queues; i++)
+			if (iavf_set_itr_per_queue(adapter, ec, i))
+				return -EINVAL;
+	} else if (queue < adapter->num_active_queues) {
+		if (iavf_set_itr_per_queue(adapter, ec, queue))
+			return -EINVAL;
+	} else {
+		netif_info(adapter, drv, netdev, "Invalid queue value, queue range is 0 - %d\n",
+			   adapter->num_active_queues - 1);
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+/**
+ * iavf_set_coalesce - Set interrupt coalescing settings
+ * @netdev: network interface device structure
+ * @ec: ethtool coalesce structure
+ *
+ * Change current coalescing settings for every queue.
+ **/
+static int iavf_set_coalesce(struct net_device *netdev,
+			     struct ethtool_coalesce *ec)
+{
+	return __iavf_set_coalesce(netdev, ec, -1);
+}
+
+/**
+ * iavf_set_per_queue_coalesce - set specific queue's coalesce settings
+ * @netdev: the netdev to change
+ * @ec: ethtool's coalesce settings
+ * @queue: the queue to modify
+ *
+ * Modifies a specific queue's coalesce settings.
+ */
+static int iavf_set_per_queue_coalesce(struct net_device *netdev, u32 queue,
+				       struct ethtool_coalesce *ec)
+{
+	return __iavf_set_coalesce(netdev, ec, queue);
+}
+
+/**
+ * iavf_get_rxnfc - command to get RX flow classification rules
+ * @netdev: network interface device structure
+ * @cmd: ethtool rxnfc command
+ * @rule_locs: pointer to store rule locations
+ *
+ * Returns Success if the command is supported.
+ **/
+static int iavf_get_rxnfc(struct net_device *netdev, struct ethtool_rxnfc *cmd,
+			  u32 *rule_locs)
+{
+	struct iavf_adapter *adapter = netdev_priv(netdev);
+	int ret = -EOPNOTSUPP;
+
+	switch (cmd->cmd) {
+	case ETHTOOL_GRXRINGS:
+		cmd->data = adapter->num_active_queues;
+		ret = 0;
+		break;
+	case ETHTOOL_GRXFH:
+		netdev_info(netdev,
+			    "RSS hash info is not available to vf, use pf.\n");
+		break;
+	default:
+		break;
+	}
+
+	return ret;
+}
+/**
+ * iavf_get_channels: get the number of channels supported by the device
+ * @netdev: network interface device structure
+ * @ch: channel information structure
+ *
+ * For the purposes of our device, we only use combined channels, i.e. a tx/rx
+ * queue pair. Report one extra channel to match our "other" MSI-X vector.
+ **/
+static void iavf_get_channels(struct net_device *netdev,
+			      struct ethtool_channels *ch)
+{
+	struct iavf_adapter *adapter = netdev_priv(netdev);
+
+	/* Report maximum channels */
+	ch->max_combined = adapter->vsi_res->num_queue_pairs;
+
+	ch->max_other = NONQ_VECS;
+	ch->other_count = NONQ_VECS;
+
+	ch->combined_count = adapter->num_active_queues;
+}
+
+/**
+ * iavf_set_channels: set the new channel count
+ * @netdev: network interface device structure
+ * @ch: channel information structure
+ *
+ * Negotiate a new number of channels with the PF then do a reset.  During
+ * reset we'll realloc queues and fix the RSS table.  Returns 0 on success,
+ * negative on failure.
+ **/
+static int iavf_set_channels(struct net_device *netdev,
+			     struct ethtool_channels *ch)
+{
+	struct iavf_adapter *adapter = netdev_priv(netdev);
+	u32 num_req = ch->combined_count;
+	int i;
+
+	if ((adapter->vf_res->vf_cap_flags & VIRTCHNL_VF_OFFLOAD_ADQ) &&
+	    adapter->num_tc) {
+		dev_info(&adapter->pdev->dev, "Cannot set channels since ADq is enabled.\n");
+		return -EINVAL;
+	}
+
+	/* All of these should have already been checked by ethtool before this
+	 * even gets to us, but just to be sure.
+	 */
+	if (num_req == 0 || num_req > adapter->vsi_res->num_queue_pairs)
+		return -EINVAL;
+
+	if (num_req == adapter->num_active_queues)
+		return 0;
+
+	if (ch->rx_count || ch->tx_count || ch->other_count != NONQ_VECS)
+		return -EINVAL;
+
+	adapter->num_req_queues = num_req;
+	adapter->flags |= IAVF_FLAG_REINIT_ITR_NEEDED;
+	iavf_schedule_reset(adapter);
+
+	/* wait for the reset is done */
+	for (i = 0; i < IAVF_RESET_WAIT_COMPLETE_COUNT; i++) {
+		msleep(IAVF_RESET_WAIT_MS);
+		if (adapter->flags & IAVF_FLAG_RESET_PENDING)
+			continue;
+		break;
+	}
+	if (i == IAVF_RESET_WAIT_COMPLETE_COUNT) {
+		adapter->flags &= ~IAVF_FLAG_REINIT_ITR_NEEDED;
+		adapter->num_req_queues = 0;
+		return -EOPNOTSUPP;
+	}
+
+	return 0;
+}
+
+/**
+ * iavf_get_rxfh_key_size - get the RSS hash key size
+ * @netdev: network interface device structure
+ *
+ * Returns the table size.
+ **/
+static u32 iavf_get_rxfh_key_size(struct net_device *netdev)
+{
+	struct iavf_adapter *adapter = netdev_priv(netdev);
+
+	return adapter->rss_key_size;
+}
+
+/**
+ * iavf_get_rxfh_indir_size - get the rx flow hash indirection table size
+ * @netdev: network interface device structure
+ *
+ * Returns the table size.
+ **/
+static u32 iavf_get_rxfh_indir_size(struct net_device *netdev)
+{
+	struct iavf_adapter *adapter = netdev_priv(netdev);
+
+	return adapter->rss_lut_size;
+}
+
+/**
+ * iavf_get_rxfh - get the rx flow hash indirection table
+ * @netdev: network interface device structure
+ * @indir: indirection table
+ * @key: hash key
+ * @hfunc: hash function in use
+ *
+ * Reads the indirection table directly from the hardware. Always returns 0.
+ **/
+static int iavf_get_rxfh(struct net_device *netdev, u32 *indir, u8 *key,
+			 u8 *hfunc)
+{
+	struct iavf_adapter *adapter = netdev_priv(netdev);
+	u16 i;
+
+	if (hfunc)
+		*hfunc = ETH_RSS_HASH_TOP;
+	if (key)
+		memcpy(key, adapter->rss_key, adapter->rss_key_size);
+
+	if (indir)
+		/* Each 32 bits pointed by 'indir' is stored with a lut entry */
+		for (i = 0; i < adapter->rss_lut_size; i++)
+			indir[i] = (u32)adapter->rss_lut[i];
+
+	return 0;
+}
+
+/**
+ * iavf_set_rxfh - set the rx flow hash indirection table
+ * @netdev: network interface device structure
+ * @indir: indirection table
+ * @key: hash key
+ * @hfunc: hash function to use
+ *
+ * Returns -EINVAL if the table specifies an inavlid queue id, otherwise
+ * returns 0 after programming the table.
+ **/
+static int iavf_set_rxfh(struct net_device *netdev, const u32 *indir,
+			 const u8 *key, const u8 hfunc)
+{
+	struct iavf_adapter *adapter = netdev_priv(netdev);
+	u16 i;
+
+	/* We do not allow change in unsupported parameters */
+	if (key ||
+	    (hfunc != ETH_RSS_HASH_NO_CHANGE && hfunc != ETH_RSS_HASH_TOP))
+		return -EOPNOTSUPP;
+	if (!indir)
+		return 0;
+
+	if (key)
+		memcpy(adapter->rss_key, key, adapter->rss_key_size);
+
+	/* Each 32 bits pointed by 'indir' is stored with a lut entry */
+	for (i = 0; i < adapter->rss_lut_size; i++)
+		adapter->rss_lut[i] = (u8)(indir[i]);
+
+	return iavf_config_rss(adapter);
+}
+
+static const struct ethtool_ops iavf_ethtool_ops = {
+	.supported_coalesce_params = ETHTOOL_COALESCE_USECS |
+				     ETHTOOL_COALESCE_MAX_FRAMES |
+				     ETHTOOL_COALESCE_MAX_FRAMES_IRQ |
+				     ETHTOOL_COALESCE_USE_ADAPTIVE,
+	.get_drvinfo		= iavf_get_drvinfo,
+	.get_link		= ethtool_op_get_link,
+	.get_ringparam		= iavf_get_ringparam,
+	.set_ringparam		= iavf_set_ringparam,
+	.get_strings		= iavf_get_strings,
+	.get_ethtool_stats	= iavf_get_ethtool_stats,
+	.get_sset_count		= iavf_get_sset_count,
+	.get_priv_flags		= iavf_get_priv_flags,
+	.set_priv_flags		= iavf_set_priv_flags,
+	.get_msglevel		= iavf_get_msglevel,
+	.set_msglevel		= iavf_set_msglevel,
+	.get_coalesce		= iavf_get_coalesce,
+	.set_coalesce		= iavf_set_coalesce,
+	.get_per_queue_coalesce = iavf_get_per_queue_coalesce,
+	.set_per_queue_coalesce = iavf_set_per_queue_coalesce,
+	.get_rxnfc		= iavf_get_rxnfc,
+	.get_rxfh_indir_size	= iavf_get_rxfh_indir_size,
+	.get_rxfh		= iavf_get_rxfh,
+	.set_rxfh		= iavf_set_rxfh,
+	.get_channels		= iavf_get_channels,
+	.set_channels		= iavf_set_channels,
+	.get_rxfh_key_size	= iavf_get_rxfh_key_size,
+	.get_link_ksettings	= iavf_get_link_ksettings,
+};
+
+/**
+ * iavf_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 iavf_set_ethtool_ops(struct net_device *netdev)
+{
+	netdev->ethtool_ops = &iavf_ethtool_ops;
+}