[src/trunk]: src/sys/dev/pci/ixgbe Add some debug printf()s and modify comments.

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

details:   https://anonhg.NetBSD.org/src/rev/e801d72acfc9
branches:  trunk
changeset: 958110:e801d72acfc9
user:      msaitoh <msaitoh%NetBSD.org@localhost>
date:      Thu Dec 24 10:00:36 2020 +0000

description:
Add some debug printf()s and modify comments.

diffstat:

 sys/dev/pci/ixgbe/ixgbe.c |  17 +++++++++++------
 1 files changed, 11 insertions(+), 6 deletions(-)

diffs (61 lines):

diff -r 8da6fe145663 -r e801d72acfc9 sys/dev/pci/ixgbe/ixgbe.c
--- a/sys/dev/pci/ixgbe/ixgbe.c Thu Dec 24 06:14:41 2020 +0000
+++ b/sys/dev/pci/ixgbe/ixgbe.c Thu Dec 24 10:00:36 2020 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: ixgbe.c,v 1.264 2020/12/24 06:14:41 msaitoh Exp $ */
+/* $NetBSD: ixgbe.c,v 1.265 2020/12/24 10:00:36 msaitoh Exp $ */
 
 /******************************************************************************
 
@@ -3105,7 +3105,7 @@
        eicr = IXGBE_READ_REG(hw, IXGBE_EICS);
        /* Be sure the queue bits are not cleared */
        eicr &= ~IXGBE_EICR_RTX_QUEUE;
-       /* Clear interrupt with write */
+       /* Clear all OTHER interrupts with write */
        IXGBE_WRITE_REG(hw, IXGBE_EICR, eicr);
 
        if (ixgbe_is_sfp(hw)) {
@@ -5172,7 +5172,7 @@
        u32             eicr, eicr_mask;
        u32             task_requests = 0;
 
-       /* Silicon errata #26 on 82598 */
+       /* Silicon errata #26 on 82598. Disable all interrupts */
        IXGBE_WRITE_REG(hw, IXGBE_EIMC, IXGBE_IRQ_CLEAR_MASK);
 
        eicr = IXGBE_READ_REG(hw, IXGBE_EICR);
@@ -5186,7 +5186,8 @@
 
        if ((ifp->if_flags & IFF_RUNNING) != 0) {
                /*
-                * The same as ixgbe_msix_que() about "que->txrx_use_workqueue".
+                * The same as ixgbe_msix_que() about
+                * "que->txrx_use_workqueue".
                 */
                que->txrx_use_workqueue = adapter->txrx_use_workqueue;
 
@@ -6142,6 +6143,8 @@
                device_printf(dev, "EIMS_EX(1):\t%08x\n",
                              IXGBE_READ_REG(hw, IXGBE_EIMS_EX(1)));
        }
+       device_printf(dev, "EIAM:\t%08x\n", IXGBE_READ_REG(hw, IXGBE_EIAM));
+       device_printf(dev, "EIAC:\t%08x\n", IXGBE_READ_REG(hw, IXGBE_EIAC));
 } /* ixgbe_print_debug_info */
 
 /************************************************************************
@@ -6566,10 +6569,12 @@
                que->req.ev_count++;
                ixgbe_sched_handle_que(adapter, que);
        } else if (que->res != NULL) {
-               /* Re-enable this interrupt */
+               /* MSIX: Re-enable this interrupt */
                ixgbe_enable_queue(adapter, que->msix);
-       } else
+       } else {
+               /* INTx or MSI */
                ixgbe_enable_intr(adapter);
+       }
 
        return;
 } /* ixgbe_handle_que */