[Bug 290793] iovctl on mlx5en won't work

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=290793

            Bug ID: 290793
           Summary: iovctl on mlx5en won't work
           Product: Base System
           Version: 15.0-CURRENT
          Hardware: amd64
                OS: Any
            Status: New
          Severity: Affects Some People
          Priority: ---
         Component: bin
          Assignee: bugs@FreeBSD.org
          Reporter: jcduss13@gmail.com

Hello,
I am not able to create functional VF on Freebsd 15, while it works on 14.3.

I tried different scenarios, setting or not a mac-addr, one VF or multiple for
example, but it made no difference. Plus, I tried firmwares 14.32.1010 and
14.32.1908.

The behavior is the same on different machines.

---------------------------------
The iovctl config looks like (mac-addr edited):

PF {
        device : "mlx5_core0";
        num_vfs : 1;
}

DEFAULT {
        passthrough : false;
}

VF-0 {
        mac-addr : "aa:bb:cc:dd:ee:ff";
}
--------------------------------------------

pciconf: for the 1st port 

root@pulseczar:~ # pciconf -lcv  mlx5_core0@pci0:1:0:0
mlx5_core0@pci0:1:0:0:  class=0x020000 rev=0x00 hdr=0x00 vendor=0x15b3
device=0x1015 subvendor=0x15b3 subdevice=0x0003
    vendor     = 'Mellanox Technologies'
    device     = 'MT27710 Family [ConnectX-4 Lx]'
    class      = network
    subclass   = ethernet
    cap 10[60] = PCI-Express 2 endpoint max data 512(512) FLR RO NS
                 max read 512
                 link x8(x8) speed 8.0(8.0) ASPM L1(L1)
    cap 03[48] = VPD
    cap 11[9c] = MSI-X supports 64 messages, enabled
                 Table in map 0x10[0x2000], PBA in map 0x10[0x3000]
    cap 09[c0] = vendor (length 24)
    cap 01[40] = powerspec 3  supports D0 D3  current D0
    ecap 0001[100] = AER 1 0 fatal 0 non-fatal 1 corrected
    ecap 000e[150] = ARI 1
    ecap 0010[180] = SR-IOV 1 IOV enabled, Memory Space enabled, ARI enabled
                     2 VFs configured out of 8 supported
                     First VF RID Offset 0x0002, VF RID Stride 0x0001
                     VF Device ID 0x1016
                     Page Sizes: 4096 (enabled), 8192, 16384, 32768, 65536,
131072, 262144, 524288, 1048576, 2097152, 4194304
    iov bar  [1a4] = type Prefetchable Memory, range 64, base 0xfcf6000000,
size 1048576, enabled
    ecap 0019[1c0] = PCIe Sec 1 lane errors 0
    ecap 000d[230] = ACS 1 Source Validation unavailable, Translation Blocking
unavailable
                     P2P Req Redirect unavailable, P2P Cmpl Redirect
unavailable
                     P2P Upstream Forwarding unavailable, P2P Egress Control
unavailable
                     P2P Direct Translated unavailable, Enhanced Capability
unavailable

----------------------------------------------------------

pciconf for the 1st VF:

none0@pci0:1:0:2:       class=0x020000 rev=0x00 hdr=0x00 vendor=0x15b3
device=0x1016 subvendor=0x15b3 subdevice=0x0003
    vendor     = 'Mellanox Technologies'
    device     = 'MT27710 Family [ConnectX-4 Lx Virtual Function]'
    class      = network
    subclass   = ethernet
    cap 10[60] = PCI-Express 2 endpoint max data 128(512) FLR
                 max read 128
                 link x0(x8) speed 0.0(8.0) ASPM disabled(L1)
    cap 11[9c] = MSI-X supports 12 messages
                 Table in map 0x10[0x2000], PBA in map 0x10[0x3000]

-----------------------------------------------------------

extract from dmesg:

mlx5_core: INFO: (mlx5_core0): E-Switch: SRIOV enabled: active vports(3)
mlx5_core2: <mlx5_core> at device 0.2 on pci1
mlx5_core2: lkpi_pci_request_region: failed to alloc bar 0 type 3 rid 16
mlx5_core2: WARN: wait_fw_init:778:(pid 4309): Waiting for FW initialization,
timeout abort in 3 s
mlx5_core2: WARN: wait_fw_init:778:(pid 4309): Waiting for FW initialization,
timeout abort in 0 s
mlx5_core2: Firmware over 5000 MS in pre-initializing state, aborting
mlx5_core2: ERR: init_one:1709:(pid 4309): mlx5_load_one failed -16
device_attach: mlx5_core2 attach returned 16

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