fm10k: Add support for multiple queues
This patch takes the driver from supporting a single queue to supporting
multiple queues. The upper queue limit for the PF is 128 queues and the
upper limit for the VF is (128 / num_vfs) rounded down to nearest power of 2.
Signed-off-by: Alexander Duyck <alexander.h.duyck@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
diff --git a/drivers/net/ethernet/intel/fm10k/fm10k_ethtool.c b/drivers/net/ethernet/intel/fm10k/fm10k_ethtool.c
index a88c75c..54e8ebd 100644
--- a/drivers/net/ethernet/intel/fm10k/fm10k_ethtool.c
+++ b/drivers/net/ethernet/intel/fm10k/fm10k_ethtool.c
@@ -838,6 +838,61 @@
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,
@@ -860,6 +915,8 @@
.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)