+/**
+ * fm10k_set_qos_queues: Allocate queues for a QOS-enabled device
+ * @interface: board private structure to initialize
+ *
+ * When QoS (Quality of Service) is enabled, allocate queues for
+ * each traffic class. If multiqueue isn't available,then abort QoS
+ * initialization.
+ *
+ * This function handles all combinations of Qos and RSS.
+ *
+ **/
+static bool fm10k_set_qos_queues(struct fm10k_intfc *interface)
+{
+ struct net_device *dev = interface->netdev;
+ struct fm10k_ring_feature *f;
+ int rss_i, i;
+ int pcs;
+
+ /* Map queue offset and counts onto allocated tx queues */
+ pcs = netdev_get_num_tc(dev);
+
+ if (pcs <= 1)
+ return false;
+
+ /* set QoS mask and indices */
+ f = &interface->ring_feature[RING_F_QOS];
+ f->indices = pcs;
+ f->mask = (1 << fls(pcs - 1)) - 1;
+
+ /* determine the upper limit for our current DCB mode */
+ rss_i = interface->hw.mac.max_queues / pcs;
+ rss_i = 1 << (fls(rss_i) - 1);
+
+ /* set RSS mask and indices */
+ f = &interface->ring_feature[RING_F_RSS];
+ rss_i = min_t(u16, rss_i, f->limit);
+ f->indices = rss_i;
+ f->mask = (1 << fls(rss_i - 1)) - 1;
+
+ /* configure pause class to queue mapping */
+ for (i = 0; i < pcs; i++)
+ netdev_set_tc_queue(dev, i, rss_i, rss_i * i);
+
+ interface->num_rx_queues = rss_i * pcs;
+ interface->num_tx_queues = rss_i * pcs;
+
+ return true;
+}
+
+/**
+ * fm10k_set_rss_queues: Allocate queues for RSS
+ * @interface: board private structure to initialize
+ *
+ * This is our "base" multiqueue mode. RSS (Receive Side Scaling) will try
+ * to allocate one Rx queue per CPU, and if available, one Tx queue per CPU.
+ *
+ **/
+static bool fm10k_set_rss_queues(struct fm10k_intfc *interface)
+{
+ struct fm10k_ring_feature *f;
+ u16 rss_i;
+
+ f = &interface->ring_feature[RING_F_RSS];
+ rss_i = min_t(u16, interface->hw.mac.max_queues, f->limit);
+
+ /* record indices and power of 2 mask for RSS */
+ f->indices = rss_i;
+ f->mask = (1 << fls(rss_i - 1)) - 1;
+
+ interface->num_rx_queues = rss_i;
+ interface->num_tx_queues = rss_i;
+
+ return true;
+}
+