11490 SRS ring polling disabled for VLANs
11491 Want DLS bypass for VLAN traffic
11492 add VLVF bypass to ixgbe core
2869 duplicate packets with vnics over aggrs
11489 DLS stat delete and aggr kstat can deadlock
Portions contributed by: Theo Schlossnagle <jesus@omniti.com>
Reviewed by: Patrick Mooney <patrick.mooney@joyent.com>
Reviewed by: Robert Mustacchi <rm@joyent.com>
Reviewed by: Dan McDonald <danmcd@joyent.com>

@@ -1375,28 +1375,26 @@
         }
         return (ENOTSUP);
 }
 
 /*
- * dld_capab_poll_enable()
+ * This function is misnamed. All polling and fanouts are run out of
+ * the lower MAC for VNICs and out of the MAC for NICs. The
+ * availability of Rx rings and promiscous mode is taken care of
+ * between the soft ring set (mac_srs), the Rx ring, and the SW
+ * classifier. Fanout, if necessary, is done by the soft rings that
+ * are part of the SRS. By default the SRS divvies up the packets
+ * based on protocol: TCP, UDP, or Other (OTH).
  *
- * This function is misnamed. All polling  and fanouts are run out of the
- * lower mac (in case of VNIC and the only mac in case of NICs). The
- * availability of Rx ring and promiscous mode is all taken care between
- * the soft ring set (mac_srs), the Rx ring, and S/W classifier. Any
- * fanout necessary is done by the soft rings that are part of the
- * mac_srs (by default mac_srs sends the packets up via a TCP and
- * non TCP soft ring).
- *
- * The mac_srs (or its associated soft rings) always store the ill_rx_ring
+ * The SRS (or its associated soft rings) always store the ill_rx_ring
  * (the cookie returned when they registered with IP during plumb) as their
  * 2nd argument which is passed up as mac_resource_handle_t. The upcall
  * function and 1st argument is what the caller registered when they
  * called mac_rx_classify_flow_add() to register the flow. For VNIC,
  * the function is vnic_rx and argument is vnic_t. For regular NIC
  * case, it mac_rx_default and mac_handle_t. As explained above, the
- * mac_srs (or its soft ring) will add the ill_rx_ring (mac_resource_handle_t)
+ * SRS (or its soft ring) will add the ill_rx_ring (mac_resource_handle_t)
  * from its stored 2nd argument.
  */
 static int
 dld_capab_poll_enable(dld_str_t *dsp, dld_capab_poll_t *poll)
 {

@@ -1405,15 +1403,15 @@
 
         if ((dld_opt & DLD_OPT_NO_POLL) != 0 || dsp->ds_mode == DLD_RAW)
                 return (ENOTSUP);
 
         /*
-         * Enable client polling if and only if DLS bypass is possible.
-         * Special cases like VLANs need DLS processing in the Rx data path.
-         * In such a case we can neither allow the client (IP) to directly
-         * poll the softring (since DLS processing hasn't been done) nor can
-         * we allow DLS bypass.
+         * Enable client polling if and only if DLS bypass is
+         * possible. Some traffic requires DLS processing in the Rx
+         * data path. In such a case we can neither allow the client
+         * (IP) to directly poll the soft ring (since DLS processing
+         * hasn't been done) nor can we allow DLS bypass.
          */
         if (!mac_rx_bypass_set(dsp->ds_mch, dsp->ds_rx, dsp->ds_rx_arg))
                 return (ENOTSUP);
 
         /*