return 0;
}
+static unsigned int fm10k_max_channels(struct net_device *dev)
+{
+ struct fm10k_intfc *interface = netdev_priv(dev);
+ unsigned int max_combined = interface->hw.mac.max_queues;
+ u8 tcs = netdev_get_num_tc(dev);
+
+ /* For QoS report channels per traffic class */
+ if (tcs > 1)
+ max_combined = 1 << (fls(max_combined / tcs) - 1);
+
+ return max_combined;
+}
+
+static void fm10k_get_channels(struct net_device *dev,
+ struct ethtool_channels *ch)
+{
+ struct fm10k_intfc *interface = netdev_priv(dev);
+ struct fm10k_hw *hw = &interface->hw;
+
+ /* report maximum channels */
+ ch->max_combined = fm10k_max_channels(dev);
+
+ /* report info for other vector */
+ ch->max_other = NON_Q_VECTORS(hw);
+ ch->other_count = ch->max_other;
+
+ /* record RSS queues */
+ ch->combined_count = interface->ring_feature[RING_F_RSS].indices;
+}
+
+static int fm10k_set_channels(struct net_device *dev,
+ struct ethtool_channels *ch)
+{
+ struct fm10k_intfc *interface = netdev_priv(dev);
+ unsigned int count = ch->combined_count;
+ struct fm10k_hw *hw = &interface->hw;
+
+ /* verify they are not requesting separate vectors */
+ if (!count || ch->rx_count || ch->tx_count)
+ return -EINVAL;
+
+ /* verify other_count has not changed */
+ if (ch->other_count != NON_Q_VECTORS(hw))
+ return -EINVAL;
+
+ /* verify the number of channels does not exceed hardware limits */
+ if (count > fm10k_max_channels(dev))
+ return -EINVAL;
+
+ interface->ring_feature[RING_F_RSS].limit = count;
+
+ /* use setup TC to update any traffic class queue mapping */
+ return fm10k_setup_tc(dev, netdev_get_num_tc(dev));
+}
+
static const struct ethtool_ops fm10k_ethtool_ops = {
.get_strings = fm10k_get_strings,
.get_sset_count = fm10k_get_sset_count,
.get_rxfh_key_size = fm10k_get_rssrk_size,
.get_rxfh = fm10k_get_rssh,
.set_rxfh = fm10k_set_rssh,
+ .get_channels = fm10k_get_channels,
+ .set_channels = fm10k_set_channels,
};
void fm10k_set_ethtool_ops(struct net_device *dev)
return 0;
}
+/**
+ * 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;
+}
+
/**
* fm10k_set_num_queues: Allocate queues for device, feature dependent
* @interface: board private structure to initialize
/* Start with base case */
interface->num_rx_queues = 1;
interface->num_tx_queues = 1;
+
+ if (fm10k_set_qos_queues(interface))
+ return;
+
+ fm10k_set_rss_queues(interface);
}
/**
return 0;
}
+/**
+ * fm10k_cache_ring_qos - Descriptor ring to register mapping for QoS
+ * @interface: Interface structure continaining rings and devices
+ *
+ * Cache the descriptor ring offsets for Qos
+ **/
+static bool fm10k_cache_ring_qos(struct fm10k_intfc *interface)
+{
+ struct net_device *dev = interface->netdev;
+ int pc, offset, rss_i, i, q_idx;
+ u16 pc_stride = interface->ring_feature[RING_F_QOS].mask + 1;
+ u8 num_pcs = netdev_get_num_tc(dev);
+
+ if (num_pcs <= 1)
+ return false;
+
+ rss_i = interface->ring_feature[RING_F_RSS].indices;
+
+ for (pc = 0, offset = 0; pc < num_pcs; pc++, offset += rss_i) {
+ q_idx = pc;
+ for (i = 0; i < rss_i; i++) {
+ interface->tx_ring[offset + i]->reg_idx = q_idx;
+ interface->tx_ring[offset + i]->qos_pc = pc;
+ interface->rx_ring[offset + i]->reg_idx = q_idx;
+ interface->rx_ring[offset + i]->qos_pc = pc;
+ q_idx += pc_stride;
+ }
+ }
+
+ return true;
+}
+
+/**
+ * fm10k_cache_ring_rss - Descriptor ring to register mapping for RSS
+ * @interface: Interface structure continaining rings and devices
+ *
+ * Cache the descriptor ring offsets for RSS
+ **/
+static void fm10k_cache_ring_rss(struct fm10k_intfc *interface)
+{
+ int i;
+
+ for (i = 0; i < interface->num_rx_queues; i++)
+ interface->rx_ring[i]->reg_idx = i;
+
+ for (i = 0; i < interface->num_tx_queues; i++)
+ interface->tx_ring[i]->reg_idx = i;
+}
+
+/**
+ * fm10k_assign_rings - Map rings to network devices
+ * @interface: Interface structure containing rings and devices
+ *
+ * This function is meant to go though and configure both the network
+ * devices so that they contain rings, and configure the rings so that
+ * they function with their network devices.
+ **/
+static void fm10k_assign_rings(struct fm10k_intfc *interface)
+{
+ if (fm10k_cache_ring_qos(interface))
+ return;
+
+ fm10k_cache_ring_rss(interface);
+}
+
static void fm10k_init_reta(struct fm10k_intfc *interface)
{
u16 i, rss_i = interface->ring_feature[RING_F_RSS].indices;
if (err)
return err;
+ /* Map rings to devices, and map devices to physical queues */
+ fm10k_assign_rings(interface);
+
/* Initialize RSS redirection table */
fm10k_init_reta(interface);
return stats;
}
+int fm10k_setup_tc(struct net_device *dev, u8 tc)
+{
+ struct fm10k_intfc *interface = netdev_priv(dev);
+
+ /* Currently only the PF supports priority classes */
+ if (tc && (interface->hw.mac.type != fm10k_mac_pf))
+ return -EINVAL;
+
+ /* Hardware supports up to 8 traffic classes */
+ if (tc > 8)
+ return -EINVAL;
+
+ /* Hardware has to reinitialize queues to match packet
+ * buffer alignment. Unfortunately, the hardware is not
+ * flexible enough to do this dynamically.
+ */
+ if (netif_running(dev))
+ fm10k_close(dev);
+
+ fm10k_mbx_free_irq(interface);
+
+ fm10k_clear_queueing_scheme(interface);
+
+ /* we expect the prio_tc map to be repopulated later */
+ netdev_reset_tc(dev);
+ netdev_set_num_tc(dev, tc);
+
+ fm10k_init_queueing_scheme(interface);
+
+ fm10k_mbx_request_irq(interface);
+
+ if (netif_running(dev))
+ fm10k_open(dev);
+
+ /* flag to indicate SWPRI has yet to be updated */
+ interface->flags |= FM10K_FLAG_SWPRI_CONFIG;
+
+ return 0;
+}
+
static const struct net_device_ops fm10k_netdev_ops = {
.ndo_open = fm10k_open,
.ndo_stop = fm10k_close,
.ndo_vlan_rx_kill_vid = fm10k_vlan_rx_kill_vid,
.ndo_set_rx_mode = fm10k_set_rx_mode,
.ndo_get_stats64 = fm10k_get_stats64,
+ .ndo_setup_tc = fm10k_setup_tc,
};
#define DEFAULT_DEBUG_LEVEL_SHIFT 3
projects / karo-tx-linux.git / commitdiff