[src/trunk]: src/sys/dev/pci/ixgbe - Fix a bug that the VLAN HW tagging funct...

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

details:   https://anonhg.NetBSD.org/src/rev/fb9804fe2d2e
branches:  trunk
changeset: 449617:fb9804fe2d2e
user:      msaitoh <msaitoh%NetBSD.org@localhost>
date:      Wed Mar 13 10:02:13 2019 +0000

description:
- Fix a bug that the VLAN HW tagging function is not correctly disabled
  when all vlan is detached.
- Fix a bug that VLAN HW tagging function is not correctly controlled on 82598.
- Control VLAN HW filter function correctly.
- Don't clear IXGBE_VLNCTRL_CFIEN bit When ETHERCAP_VLAN_HWFILTER is set.
  I think it's not required (and Linux doesn't do it). This change has no
  effect to NetBSD because ETHERCAP_VLAN_HWFILTER is not supported yet.

diffstat:

 sys/dev/pci/ixgbe/ixgbe.c |  56 +++++++++++++++++++++++++---------------------
 1 files changed, 30 insertions(+), 26 deletions(-)

diffs (85 lines):

diff -r 2ed68a9b8b44 -r fb9804fe2d2e sys/dev/pci/ixgbe/ixgbe.c
--- a/sys/dev/pci/ixgbe/ixgbe.c Wed Mar 13 09:42:01 2019 +0000
+++ b/sys/dev/pci/ixgbe/ixgbe.c Wed Mar 13 10:02:13 2019 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: ixgbe.c,v 1.176 2019/03/05 10:26:08 msaitoh Exp $ */
+/* $NetBSD: ixgbe.c,v 1.177 2019/03/13 10:02:13 msaitoh Exp $ */
 
 /******************************************************************************
 
@@ -2369,33 +2369,32 @@
        struct rx_ring  *rxr;
        int             i;
        u32             ctrl;
-
+       bool            hwtagging;
 
        /*
-        * We get here thru init_locked, meaning
-        * a soft reset, this has already cleared
-        * the VFTA and other state, so if there
-        * have been no vlan's registered do nothing.
+        *  This function is called from both if_init and ifflags_cb()
+        * on NetBSD.
         */
-       if (!VLAN_ATTACHED(&adapter->osdep.ec))
-               return;
+
+       /* Enalble HW tagging only if any vlan is attached */
+       hwtagging = (ec->ec_capenable & ETHERCAP_VLAN_HWTAGGING)
+           && VLAN_ATTACHED(&adapter->osdep.ec);
 
        /* Setup the queues for vlans */
-       if (ec->ec_capenable & ETHERCAP_VLAN_HWTAGGING) {
-               for (i = 0; i < adapter->num_queues; i++) {
-                       rxr = &adapter->rx_rings[i];
-                       /* On 82599 the VLAN enable is per/queue in RXDCTL */
-                       if (hw->mac.type != ixgbe_mac_82598EB) {
-                               ctrl = IXGBE_READ_REG(hw, IXGBE_RXDCTL(rxr->me));
+       for (i = 0; i < adapter->num_queues; i++) {
+               rxr = &adapter->rx_rings[i];
+               /* On 82599 the VLAN enable is per/queue in RXDCTL */
+               if (hw->mac.type != ixgbe_mac_82598EB) {
+                       ctrl = IXGBE_READ_REG(hw, IXGBE_RXDCTL(rxr->me));
+                       if (hwtagging)
                                ctrl |= IXGBE_RXDCTL_VME;
-                               IXGBE_WRITE_REG(hw, IXGBE_RXDCTL(rxr->me), ctrl);
-                       }
-                       rxr->vtag_strip = TRUE;
+                       else
+                               ctrl &= ~IXGBE_RXDCTL_VME;
+                       IXGBE_WRITE_REG(hw, IXGBE_RXDCTL(rxr->me), ctrl);
                }
-       }
-
-       if ((ec->ec_capenable & ETHERCAP_VLAN_HWFILTER) == 0)
-               return;
+               rxr->vtag_strip = hwtagging ? TRUE : FALSE;
+       }
+
        /*
         * A soft reset zero's out the VFTA, so
         * we need to repopulate it now.
@@ -2407,12 +2406,17 @@
 
        ctrl = IXGBE_READ_REG(hw, IXGBE_VLNCTRL);
        /* Enable the Filter Table if enabled */
-       if (ec->ec_capenable & ETHERCAP_VLAN_HWFILTER) {
-               ctrl &= ~IXGBE_VLNCTRL_CFIEN;
+       if (ec->ec_capenable & ETHERCAP_VLAN_HWFILTER)
                ctrl |= IXGBE_VLNCTRL_VFE;
-       }
-       if (hw->mac.type == ixgbe_mac_82598EB)
-               ctrl |= IXGBE_VLNCTRL_VME;
+       else
+               ctrl &= ~IXGBE_VLNCTRL_VFE;
+       /* VLAN hw tagging for 82598 */
+       if (hw->mac.type == ixgbe_mac_82598EB) {
+               if (hwtagging)
+                       ctrl |= IXGBE_VLNCTRL_VME;
+               else
+                       ctrl &= ~IXGBE_VLNCTRL_VME;
+       }
        IXGBE_WRITE_REG(hw, IXGBE_VLNCTRL, ctrl);
 } /* ixgbe_setup_vlan_hw_support */