[src/trunk]: src/sys/dev/pci Fixes a bug that "ifmedia vge0 media 1000baseT-F...

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

details:   https://anonhg.NetBSD.org/src/rev/7c39256876e0
branches:  trunk
changeset: 461212:7c39256876e0
user:      msaitoh <msaitoh%NetBSD.org@localhost>
date:      Tue Nov 19 09:54:07 2019 +0000

description:
Fixes a bug that "ifmedia vge0 media 1000baseT-FDX" causes device timeout.

If the interface's media is NOT in the "best" mode (i.e. other than IFM_AUTO),
control VGE_DIAGCTL_GMII bit.

diffstat:

 sys/dev/pci/if_vge.c |  30 ++++++++++++++++++------------
 1 files changed, 18 insertions(+), 12 deletions(-)

diffs (72 lines):

diff -r ce6603556384 -r 7c39256876e0 sys/dev/pci/if_vge.c
--- a/sys/dev/pci/if_vge.c      Tue Nov 19 08:59:18 2019 +0000
+++ b/sys/dev/pci/if_vge.c      Tue Nov 19 09:54:07 2019 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: if_vge.c,v 1.75 2019/10/08 14:26:27 msaitoh Exp $ */
+/* $NetBSD: if_vge.c,v 1.76 2019/11/19 09:54:07 msaitoh Exp $ */
 
 /*-
  * Copyright (c) 2004
@@ -35,7 +35,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: if_vge.c,v 1.75 2019/10/08 14:26:27 msaitoh Exp $");
+__KERNEL_RCSID(0, "$NetBSD: if_vge.c,v 1.76 2019/11/19 09:54:07 msaitoh Exp $");
 
 /*
  * VIA Networking Technologies VT612x PCI gigabit ethernet NIC driver.
@@ -1916,6 +1916,7 @@
        struct vge_softc *sc = ifp->if_softc;
        struct mii_data *mii = &sc->sc_mii;
        struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
+       uint8_t dctl;
 
        /*
         * If the user manually selects a media mode, we need to turn
@@ -1928,23 +1929,26 @@
         * the FDX bit cleared.
         */
 
+       dctl = CSR_READ_1(sc, VGE_DIAGCTL);
+
        switch (IFM_SUBTYPE(ife->ifm_media)) {
        case IFM_AUTO:
-               CSR_CLRBIT_1(sc, VGE_DIAGCTL, VGE_DIAGCTL_MACFORCE);
-               CSR_CLRBIT_1(sc, VGE_DIAGCTL, VGE_DIAGCTL_FDXFORCE);
+               dctl &= ~VGE_DIAGCTL_MACFORCE;
+               dctl &= ~VGE_DIAGCTL_FDXFORCE;
                break;
        case IFM_1000_T:
-               CSR_SETBIT_1(sc, VGE_DIAGCTL, VGE_DIAGCTL_MACFORCE);
-               CSR_CLRBIT_1(sc, VGE_DIAGCTL, VGE_DIAGCTL_FDXFORCE);
+               dctl |= VGE_DIAGCTL_MACFORCE;
+               dctl &= ~VGE_DIAGCTL_FDXFORCE;
+               dctl |= VGE_DIAGCTL_GMII;
                break;
        case IFM_100_TX:
        case IFM_10_T:
-               CSR_SETBIT_1(sc, VGE_DIAGCTL, VGE_DIAGCTL_MACFORCE);
-               if ((ife->ifm_media & IFM_FDX) != 0) {
-                       CSR_SETBIT_1(sc, VGE_DIAGCTL, VGE_DIAGCTL_FDXFORCE);
-               } else {
-                       CSR_CLRBIT_1(sc, VGE_DIAGCTL, VGE_DIAGCTL_FDXFORCE);
-               }
+               dctl |= VGE_DIAGCTL_MACFORCE;
+               dctl &= ~VGE_DIAGCTL_GMII;
+               if ((ife->ifm_media & IFM_FDX) != 0)
+                       dctl |= VGE_DIAGCTL_FDXFORCE;
+               else
+                       dctl &= ~VGE_DIAGCTL_FDXFORCE;
                break;
        default:
                printf("%s: unknown media type: %x\n",
@@ -1952,6 +1956,8 @@
                    IFM_SUBTYPE(ife->ifm_media));
                break;
        }
+
+       CSR_WRITE_1(sc, VGE_DIAGCTL, dctl);
 }
 
 static int