+/**
+ * bnx2x_setup_tc - routine to configure net_device for multi tc
+ *
+ * @netdev: net device to configure
+ * @tc: number of traffic classes to enable
+ *
+ * callback connected to the ndo_setup_tc function pointer
+ */
+int bnx2x_setup_tc(struct net_device *dev, u8 num_tc)
+{
+ int cos, prio, count, offset;
+ struct bnx2x *bp = netdev_priv(dev);
+
+ /* setup tc must be called under rtnl lock */
+ ASSERT_RTNL();
+
+ /* no traffic classes requested. aborting */
+ if (!num_tc) {
+ netdev_reset_tc(dev);
+ return 0;
+ }
+
+ /* requested to support too many traffic classes */
+ if (num_tc > bp->max_cos) {
+ DP(NETIF_MSG_TX_ERR, "support for too many traffic classes"
+ " requested: %d. max supported is %d",
+ num_tc, bp->max_cos);
+ return -EINVAL;
+ }
+
+ /* declare amount of supported traffic classes */
+ if (netdev_set_num_tc(dev, num_tc)) {
+ DP(NETIF_MSG_TX_ERR, "failed to declare %d traffic classes",
+ num_tc);
+ return -EINVAL;
+ }
+
+ /* configure priority to traffic class mapping */
+ for (prio = 0; prio < BNX2X_MAX_PRIORITY; prio++) {
+ netdev_set_prio_tc_map(dev, prio, bp->prio_to_cos[prio]);
+ DP(BNX2X_MSG_SP, "mapping priority %d to tc %d",
+ prio, bp->prio_to_cos[prio]);
+ }
+
+
+ /* Use this configuration to diffrentiate tc0 from other COSes
+ This can be used for ets or pfc, and save the effort of setting
+ up a multio class queue disc or negotiating DCBX with a switch
+ netdev_set_prio_tc_map(dev, 0, 0);
+ DP(BNX2X_MSG_SP, "mapping priority %d to tc %d", 0, 0);
+ for (prio = 1; prio < 16; prio++) {
+ netdev_set_prio_tc_map(dev, prio, 1);
+ DP(BNX2X_MSG_SP, "mapping priority %d to tc %d", prio, 1);
+ } */
+
+ /* configure traffic class to transmission queue mapping */
+ for (cos = 0; cos < bp->max_cos; cos++) {
+ count = BNX2X_NUM_ETH_QUEUES(bp);
+ offset = cos * MAX_TXQS_PER_COS;
+ netdev_set_tc_queue(dev, cos, count, offset);
+ DP(BNX2X_MSG_SP, "mapping tc %d to offset %d count %d",
+ cos, offset, count);
+ }
+
+ return 0;
+}
+