svn commit: r235369 - head/sys/dev/etherswitch/arswitch

[Adrian Chadd]

Author: adrian
Date: Sat May 12 20:39:41 2012
New Revision: 235369
URL: http://svn.freebsd.org/changeset/base/235369

Log:
  Document what the flood register setting does.

Modified:
  head/sys/dev/etherswitch/arswitch/arswitch_8316.c

Modified: head/sys/dev/etherswitch/arswitch/arswitch_8316.c
==============================================================================
--- head/sys/dev/etherswitch/arswitch/arswitch_8316.c	Sat May 12 20:38:18 2012	(r235368)
+++ head/sys/dev/etherswitch/arswitch/arswitch_8316.c	Sat May 12 20:39:41 2012	(r235369)
@@ -128,7 +128,14 @@ ar8316_hw_global_setup(struct arswitch_s
 {
 
 	arswitch_writereg(sc->sc_dev, 0x38, 0xc000050e);
-	arswitch_writereg(sc->sc_dev, AR8X16_REG_FLOOD_MASK, 0x003f003f);
+
+	/*
+	 * Flood address table misses to all ports, and enable forwarding of
+	 * broadcasts to the cpu port.
+	 */
+	arswitch_writereg(sc->sc_dev, AR8X16_REG_FLOOD_MASK,
+	    AR8X16_FLOOD_MASK_BCAST_TO_CPU | 0x003f003f);
+
 	arswitch_modifyreg(sc->sc_dev, AR8X16_REG_GLOBAL_CTRL,
 	    AR8316_GLOBAL_CTRL_MTU_MASK, 9018 + 8 + 2);