[src/trunk]: src/sys/dev/pci/ixgbe Fix a bug that hw.ixgN.wol_enable=0 doesn'...

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

details:   https://anonhg.NetBSD.org/src/rev/0c4d26222769
branches:  trunk
changeset: 820070:0c4d26222769
user:      msaitoh <msaitoh%NetBSD.org@localhost>
date:      Wed Dec 28 09:29:35 2016 +0000

description:
Fix a bug that hw.ixgN.wol_enable=0 doesn't work correctly. Clear the WUC
and WUFC register if wol_enable is 0. ixgbe_setup_low_power_mode() calls
ixgbe_stop() and it resets the chip. The reset change WUC and WUFC registers to
the default, so clearing WUC and WUFC should be done after ixgbe_stop().

diffstat:

 sys/dev/pci/ixgbe/ixgbe.c |  34 +++++++++++++++++++---------------
 1 files changed, 19 insertions(+), 15 deletions(-)

diffs (61 lines):

diff -r 0f644921a9bc -r 0c4d26222769 sys/dev/pci/ixgbe/ixgbe.c
--- a/sys/dev/pci/ixgbe/ixgbe.c Wed Dec 28 08:57:20 2016 +0000
+++ b/sys/dev/pci/ixgbe/ixgbe.c Wed Dec 28 09:29:35 2016 +0000
@@ -59,7 +59,7 @@
  * POSSIBILITY OF SUCH DAMAGE.
  */
 /*$FreeBSD: head/sys/dev/ixgbe/if_ix.c 302384 2016-07-07 03:39:18Z sbruno $*/
-/*$NetBSD: ixgbe.c,v 1.57 2016/12/28 07:05:11 msaitoh Exp $*/
+/*$NetBSD: ixgbe.c,v 1.58 2016/12/28 09:29:35 msaitoh Exp $*/
 
 #include "opt_inet.h"
 #include "opt_inet6.h"
@@ -4157,12 +4157,27 @@
 
        KASSERT(mutex_owned(&adapter->core_mtx));
 
-       if (!hw->wol_enabled)
-               ixgbe_set_phy_power(hw, FALSE);
-
        /* Limit power management flow to X550EM baseT */
        if (hw->device_id == IXGBE_DEV_ID_X550EM_X_10G_T
            && hw->phy.ops.enter_lplu) {
+               /* X550EM baseT adapters need a special LPLU flow */
+               hw->phy.reset_disable = true;
+               ixgbe_stop(adapter);
+               error = hw->phy.ops.enter_lplu(hw);
+               if (error)
+                       device_printf(dev,
+                           "Error entering LPLU: %d\n", error);
+               hw->phy.reset_disable = false;
+       } else {
+               /* Just stop for other adapters */
+               ixgbe_stop(adapter);
+       }
+
+       if (!hw->wol_enabled) {
+               ixgbe_set_phy_power(hw, FALSE);
+               IXGBE_WRITE_REG(hw, IXGBE_WUFC, 0);
+               IXGBE_WRITE_REG(hw, IXGBE_WUC, 0);
+       } else {
                /* Turn off support for APM wakeup. (Using ACPI instead) */
                IXGBE_WRITE_REG(hw, IXGBE_GRC,
                    IXGBE_READ_REG(hw, IXGBE_GRC) & ~(u32)2);
@@ -4183,17 +4198,6 @@
                IXGBE_WRITE_REG(hw, IXGBE_WUC,
                    IXGBE_WUC_WKEN | IXGBE_WUC_PME_EN);
 
-               /* X550EM baseT adapters need a special LPLU flow */
-               hw->phy.reset_disable = true;
-               ixgbe_stop(adapter);
-               error = hw->phy.ops.enter_lplu(hw);
-               if (error)
-                       device_printf(dev,
-                           "Error entering LPLU: %d\n", error);
-               hw->phy.reset_disable = false;
-       } else {
-               /* Just stop for other adapters */
-               ixgbe_stop(adapter);
        }
 
        return error;