Re: iwlwifi failed to attach

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On Tue, 29 Mar 2022, Oleksandr Kryvulia wrote:

>> iwm(4) is likely compiled into the kernel... forgive me.  You can proabbly
>> try
>> hint.iwm.disabled="1"
>> or
>> hint.iwm.0.disabled="1"
>> 
>> in loader.conf and see if that helps or compile a kernel without iwm
>> and iwmfw to test.
> Ok, boot with iwm disabled:
>
> root@thinkpad:/ # kldstat -v | grep -e 'iw[ml]'
> 26    1 0xffffffff83b3f000    88070 if_iwlwifi.ko 
> (/boot/kernel/if_iwlwifi.ko)
>                526 pci/lkpi_iwl_hw_card_ids
>
> pciconf -lBbcevV:

what's the reason iwlwifi did not auto-attach if iwm is not avail?

> none3@pci0:0:20:3:      class=0x028000 rev=0x30 hdr=0x00 vendor=0x8086 
> device=0x9df0 subvendor=0x8086 subdevice=0x0034
>    vendor     = 'Intel Corporation'
>    device     = 'Cannon Point-LP CNVi [Wireless-AC]'
>    class      = network
>    bar   [10] = type Memory, range 64, base 0xdd638000, size 16384, disabled

why is the bar disabled?  That should not be the case I believe on a
normal FreeBSD boot.  Even if no driver is attached or supported
pci(4) will still enable resources on boot.


>    cap 01[c8] = powerspec 3  supports D0 D3  current D3
>    cap 05[d0] = MSI supports 1 message, 64 bit
>    cap 10[40] = PCI-Express 2 root endpoint max data 128(128) FLR RO NS
>                 max read 128
>    cap 11[80] = MSI-X supports 16 messages
>                 Table in map 0x10[0x2000], PBA in map 0x10[0x3000]
>    ecap 0000[100] = unknown 0
>    ecap 0018[14c] = LTR 1
>    ecap 000b[164] = Vendor [1] ID 0010 Rev 0 Length 20
>
> Attach iwlwifi:
>
> root@thinkpad:/ # devctl set driver pci0:0:20:3 iwlwifi
> devctl: Failed to set pci0:0:20:3 driver to iwlwifi: Input/output error
>
> dmesg -a:
>
> iwlwifi0: <iwlwifi> mem 0xdd638000-0xdd63bfff at device 20.3 on pci0
> iwlwifi0: HW_REV=0xFFFFFFFF, PCI issues?
> device_attach: iwlwifi0 attach returned 5

That's EIO from the failure in iwl_trans_pcie_alloc().

Sorry, I think I have to roll this back.

I assume you are on GENERIC?

I assume iwm(4) normally is loaded as a module along with firmware
and works fine?

Ignoring the above hint.iwm... if you move if_iwm.ko out of
/boot/kernel temporary and run kldxref /boot/kernel and reboot
on a recent main or stable/13, what happens without you doing any
devctl?  Is iwlfiwi auto-loaded?  does pciconf show the BAR enabled
then?

Lots of health,
/bz

-- 
Bjoern A. Zeeb                                                     r15:7
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