[src/trunk]: src/sys/dev/pci - Set IPV6EXDIS bit in RFCTL register because of...

[msaitoh <msaitoh%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/59b5b6d2524b
branches:  trunk
changeset: 820289:59b5b6d2524b
user:      msaitoh <msaitoh%NetBSD.org@localhost>
date:      Fri Jan 06 08:05:26 2017 +0000

description:
- Set IPV6EXDIS bit in RFCTL register because of an Errata on 82575 and newer
  devices.
- Update comment in wm_init_rss().

diffstat:

 sys/dev/pci/if_wm.c |  35 ++++++++++++++++++++++++++++-------
 1 files changed, 28 insertions(+), 7 deletions(-)

diffs (73 lines):

diff -r e99c3b9893ba -r 59b5b6d2524b sys/dev/pci/if_wm.c
--- a/sys/dev/pci/if_wm.c       Fri Jan 06 03:33:19 2017 +0000
+++ b/sys/dev/pci/if_wm.c       Fri Jan 06 08:05:26 2017 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: if_wm.c,v 1.461 2017/01/04 04:43:08 knakahara Exp $    */
+/*     $NetBSD: if_wm.c,v 1.462 2017/01/06 08:05:26 msaitoh Exp $      */
 
 /*
  * Copyright (c) 2001, 2002, 2003, 2004 Wasabi Systems, Inc.
@@ -84,7 +84,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: if_wm.c,v 1.461 2017/01/04 04:43:08 knakahara Exp $");
+__KERNEL_RCSID(0, "$NetBSD: if_wm.c,v 1.462 2017/01/06 08:05:26 msaitoh Exp $");
 
 #ifdef _KERNEL_OPT
 #include "opt_net_mpsafe.h"
@@ -3709,11 +3709,11 @@
                }
                CSR_WRITE(sc, WMREG_TARC0, tarc0);
 
+               switch (sc->sc_type) {
                /*
-                * 8257[12] Errata No.52 and some others.
+                * 8257[12] Errata No.52, 82573 Errata No.43 and some others.
                 * Avoid RSS Hash Value bug.
                 */
-               switch (sc->sc_type) {
                case WM_T_82571:
                case WM_T_82572:
                case WM_T_82573:
@@ -3723,6 +3723,27 @@
                        reg |= WMREG_RFCTL_NEWIPV6EXDIS |WMREG_RFCTL_IPV6EXDIS;
                        CSR_WRITE(sc, WMREG_RFCTL, reg);
                        break;
+               /*
+                * 82575 Errata XXX, 82576 Errata 46, 82580 Errata 24,
+                * I350 Errata 37, I210 Errata No. 31 and I211 Errata No. 11:
+                * "Certain Malformed IPv6 Extension Headers are Not Processed
+                * Correctly by the Device"
+                *
+                * I354(C2000) Errata AVR53:
+                * "Malformed IPv6 Extension Headers May Result in LAN Device
+                * Hang"
+                */
+               case WM_T_82575:
+               case WM_T_82576:
+               case WM_T_82580:
+               case WM_T_I350:
+               case WM_T_I210:
+               case WM_T_I211:
+               case WM_T_I354:
+                       reg = CSR_READ(sc, WMREG_RFCTL);
+                       reg |= WMREG_RFCTL_IPV6EXDIS;
+                       CSR_WRITE(sc, WMREG_RFCTL, reg);
+                       break;
                default:
                        break;
                }
@@ -4411,9 +4432,9 @@
        else
                mrqc = MRQC_ENABLE_RSS_MQ;
 
-       /* XXXX
-        * The same as FreeBSD igb.
-        * Why doesn't use MRQC_RSS_FIELD_IPV6_EX?
+       /*
+        * MRQC_RSS_FIELD_IPV6_EX is not set because of an errata.
+        * See IPV6EXDIS bit in wm_initialize_hardware_bits().
         */
        mrqc |= (MRQC_RSS_FIELD_IPV4 | MRQC_RSS_FIELD_IPV4_TCP);
        mrqc |= (MRQC_RSS_FIELD_IPV6 | MRQC_RSS_FIELD_IPV6_TCP);