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Date:      Mon, 19 Dec 2022 22:07:50 +0000 (UTC)
From:      "Bjoern A. Zeeb" <bz@FreeBSD.org>
To:        Marco <freebsd-wireless@lordsith.net>
Cc:        "freebsd-wireless@freebsd.org" <freebsd-wireless@freebsd.org>
Subject:   Re: New laptop: AC 9461/9560: iwm or iwlwifi?
Message-ID:  <s0s6p86n-325-7r4q-12r2-164r929r4775@mnoonqbm.arg>
In-Reply-To: <Y6DZJT5mNJB8vuwi@freedom.nl>
References:  <2e3618b7-646b-02be-eb19-8a58aaf3619f@netfence.it> <srp28qr-1p8r-qsp7-6197-67359o129r35@mnoonqbm.arg> <a04c03db-3c0c-037b-3a81-221e6abd2151@netfence.it> <537f4871-5184-394e-1f93-bf625dc088cf@netfence.it> <q35r8954-195o-3rr6-9055-124sqo62o29p@SerrOFQ.bet> <Y5OueCTI/obivzkR@freedom.nl> <psr5s1os-9qn9-73q7-pr43-p3pp8s01164@mnoonqbm.arg> <Y6DP4j8AApeotsVo@freedom.nl> <Y6DWyDbEcLB1MPaS@freedom.nl> <Y6DZJT5mNJB8vuwi@freedom.nl>

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On Mon, 19 Dec 2022, Marco wrote:

> On Mon, Dec 19, 2022 at 09:25:28PM +0000, you (Marco) sent the following to [freebsd-wireless] :
>> On Mon, Dec 19, 2022 at 08:56:02PM +0000, you (Marco) sent the following to [freebsd-wireless] :
>>> On Sat, Dec 17, 2022 at 10:40:25PM +0000, you (Bjoern A. Zeeb) sent the following to [freebsd-wireless] :
>>>>
>>>> Did you try again to switch back to iwlwifi?
>>>>
>>>> What happens if you are on a running iwm setup and then do the devctl
>>>> detach, set driver dance?
>>
>> So on my current running iwm setup without changing anything else I did
>> the devtl detach, set driver dance which failed as follows:
>>
>> [~] doas pciconf -lBbcevV iwm0
>> iwm0@pci0:0:20:3:	class=0x028000 rev=0x11 hdr=0x00 vendor=0x8086 device=0x9df0 subvendor=0x8086 subdevice=0x0030
>>     vendor     = 'Intel Corporation'
>>     device     = 'Cannon Point-LP CNVi [Wireless-AC]'
>>     class      = network
>>     bar   [10] = type Memory, range 64, base 0xea238000, size 16384, enabled
>>     cap 01[c8] = powerspec 3  supports D0 D3  current D0
>>     cap 05[d0] = MSI supports 1 message, 64 bit enabled with 1 message
>>     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
>>
>>  [~] kldstat | grep -e wlan -e wi-fi -e wifi -e iwm
>>  3    1 0xffffffff82d4c000   290cc0 iwm9000fw.ko
>>  6    1 0xffffffff82fe6000     3130 wlan_xauth.ko
>>  7    1 0xffffffff82fea000    2e870 if_iwm.ko
>>
>>  [~] doas kldload /boot/kernel/if_iwlwifi.ko
>>  [~] kldstat | grep -e wlan -e wi-fi -e wifi -e iwm
>>  3    1 0xffffffff82d4c000   290cc0 iwm9000fw.ko
>>  6    1 0xffffffff82fe6000     3130 wlan_xauth.ko
>>  7    1 0xffffffff82fea000    2e870 if_iwm.ko
>> 39    1 0xffffffff85565000    880c8 if_iwlwifi.ko
>>
>>  [~] doas devctl detach pci0:0:20:3
>>  [~] doas pciconf -lBbcevV iwm0
>> pciconf: Device not found
>>
>>  [~] doas devctl set driver pci0:0:20:3 iwlwifi
>> devctl: Failed to set pci0:0:20:3 driver to iwlwifi: Input/output error
>
> Forgot to mention that despite the IO error, pciconf does list
> pci0:0:20:3 to be attached to iwlwifi0
>
> [~] d pciconf -lBbcevV iwlwifi0
> iwlwifi0@pci0:0:20:3:	class=0x028000 rev=0x11 hdr=0x00 vendor=0x8086 device=0x9df0 subvendor=0x8086 subdevice=0x0030
>    vendor     = 'Intel Corporation'
>    device     = 'Cannon Point-LP CNVi [Wireless-AC]'
>    class      = network
>    bar   [10] = type Memory, range 64, base 0xea238000, size 16384, disabled
>    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
>
> And /var/log/messages contains:
>
> Dec 19 21:17:46 harbinger rtsold[80587]: <rtsock_input_ifannounce> interface wlan0 removed
> Dec 19 21:17:46 harbinger wpa_supplicant[51703]: Error reading packet, has device disappeared?
> Dec 19 21:17:46 harbinger syslogd: last message repeated 1 times
> Dec 19 21:17:46 harbinger kernel: [811025] pid 52018 (wpa_supplicant), jid 0, uid 0: exited on signal 11 (core dumped)
> Dec 19 21:17:47 harbinger kernel: [811026] wlan0: link state changed to DOWN
> Dec 19 21:17:47 harbinger kernel: [811026] iwm0: detached
> Dec 19 21:17:47 harbinger kernel: [811026] pci0:0:20:3: Transition from D0 to D3
> Dec 19 21:17:47 harbinger root[77895]: /etc/rc.d/netif: WARNING: wlan0 does not exist.  Skipped.
> Dec 19 21:18:05 harbinger kernel: [811044] iwlwifi0: <iwlwifi> mem 0xea238000-0xea23bfff irq 16 at device 20.3 on pci0
> Dec 19 21:18:05 harbinger kernel: [811044] iwlwifi0: HW_REV=0xFFFFFFFF, PCI issues?
> Dec 19 21:18:05 harbinger kernel: [811044] device_attach: iwlwifi0 attach returned 5

You could try a devctl reset ... between detach and set driver.

Also you could try to stop the iwm0 (wlan0) before detaching and see if
that gets a clean(er) shutdown (service netif destroy wlan0 && devctl
detach ...)

/bz

-- 
Bjoern A. Zeeb                                                     r15:7



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