[Bug 245449] link down bge0 when bge_attach()

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=245449

            Bug ID: 245449
           Summary: link down bge0 when bge_attach()
           Product: Base System
           Version: 12.1-STABLE
          Hardware: amd64
                OS: Any
            Status: New
          Severity: Affects Only Me
          Priority: ---
         Component: kern
          Assignee: bugs at FreeBSD.org
          Reporter: asou at soum.co.jp

Created attachment 213188
  --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=213188&action=edit
dmesg after applied `STACKUP` patch.

I have HPE ProLiant DL20 Gen9.  This PC have `Broadcom BCM5720 A0' as below:

$ dmesg
...snip...
FreeBSD 12.1-STABLE #28 r359720M: Wed Apr  8 15:26:49 JST 2020
  root at tornado-hp:/usr/obj/usr/src/amd64.amd64/sys/GENERIC amd64
...snip...
bge0: <Broadcom BCM5720 A0, ASIC rev. 0x5720000> mem
0x92b30000-0x92b3ffff,0x92b40000-0x92b4ffff,0x92b50000-0x92b5ffff at device 0.0
numa-domain 0 on pci4
bge0: APE FW version: NCSI v1.3.16.0
bge0: CHIP ID 0x05720000; ASIC REV 0x5720; CHIP REV 0x57200; PCI-E
miibus0: <MII bus> numa-domain 0 on bge0
brgphy0: <BCM5720C 1000BASE-T media interface> PHY 1 on miibus0
brgphy0:  10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, 1000baseT,
1000baseT-master, 1000baseT-FDX, 1000baseT-FDX-master, auto, auto-flow
bge0: Using defaults for TSO: 65518/35/2048
bge0: Ethernet address: 98:f2:b3:8f:0c:94
pci0:2:0:1: failed to read VPD data.
bge1: <Broadcom BCM5720 A0, ASIC rev. 0x5720000> mem
0x92b00000-0x92b0ffff,0x92b10000-0x92b1ffff,0x92b20000-0x92b2ffff at device 0.1
numa-domain 0 on pci4
bge1: APE FW version: NCSI v1.3.16.0
bge1: CHIP ID 0x05720000; ASIC REV 0x5720; CHIP REV 0x57200; PCI-E
miibus1: <MII bus> numa-domain 0 on bge1
brgphy1: <BCM5720C 1000BASE-T media interface> PHY 2 on miibus1
brgphy1:  10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, 1000baseT,
1000baseT-master, 1000baseT-FDX, 1000baseT-FDX-master, auto, auto-flow
bge1: Using defaults for TSO: 65518/35/2048
bge1: Ethernet address: 98:f2:b3:8f:0c:95
...snip...



bge0 is assigned to IPMI and bge1 assigned to use from FreeBSD.

First, connect IPMI port by command `ipmitool -I lanplus -H 192.168.1.101  -U
Administrator sol activate'.　　The next step is to reboot FreeBSD. 　Then, the
IPMI connection will be broken.

I found this problem is occurred when bge_attach() was called.  I added the
following STACKUP to bge_reset(), and the IPMI connection is not broken.

$ svnlite diff
Index: sys/dev/bge/if_bge.c
===================================================================
--- sys/dev/bge/if_bge.c        (revision 359720)
+++ sys/dev/bge/if_bge.c        (working copy)
@@ -3958,6 +3958,9 @@
                goto fail;
        }

+       /* Tell firmware we're alive. */
+       BGE_SETBIT(sc, BGE_MODE_CTL, BGE_MODECTL_STACKUP);
+
        /* Attach driver netdump methods. */
        NETDUMP_SET(ifp, bge);


I don't think this fix is proper, but I think it's a hint to solve this
problem.

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