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From: Navdeep Parhar <np@FreeBSD.org>
Date: Sat, 4 Jun 2011 23:36:19 +0000 (UTC)
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Subject: svn commit: r222703 - head/sys/dev/cxgbe
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Author: np
Date: Sat Jun  4 23:36:19 2011
New Revision: 222703
URL: http://svn.freebsd.org/changeset/base/222703

Log:
  Cause backpressure (instead of dropping frames) on congestion.
  
  MFC after:	3 days

Modified:
  head/sys/dev/cxgbe/t4_main.c

Modified: head/sys/dev/cxgbe/t4_main.c
==============================================================================
--- head/sys/dev/cxgbe/t4_main.c	Sat Jun  4 23:31:41 2011	(r222702)
+++ head/sys/dev/cxgbe/t4_main.c	Sat Jun  4 23:36:19 2011	(r222703)
@@ -492,6 +492,8 @@ t4_attach(device_t dev)
 	    V_RXTSHIFTMAXR2(15) | V_PERSHIFTBACKOFFMAX(8) | V_PERSHIFTMAX(8) |
 	    V_KEEPALIVEMAXR1(4) | V_KEEPALIVEMAXR2(9));
 	t4_write_reg(sc, A_ULP_RX_TDDP_PSZ, V_HPZ0(PAGE_SHIFT - 12));
+	t4_set_reg_field(sc, A_TP_PARA_REG3, F_TUNNELCNGDROP0 |
+	    F_TUNNELCNGDROP1 | F_TUNNELCNGDROP2 | F_TUNNELCNGDROP3, 0);
 
 	setup_memwin(sc);