Can not unload ath11k_pci and load it back

[Mark Herbert]

[    5.777419] ath11k_pci 0000:72:00.0: BAR 0: assigned [mem 
0xa2500000-0xa25fffff 64bit]
[    5.777442] ath11k_pci 0000:72:00.0: enabling device (0000 -> 0002)
[    5.777783] ath11k_pci 0000:72:00.0: qca6390 hw2.0
[    5.934955] Loading firmware: ath11k/QCA6390/hw2.0/amss.bin
[    6.376059] ath11k_pci 0000:72:00.0: chip_id 0x0 chip_family 0xb 
board_id 0xff soc_id 0xffffffff
[    6.377450] ath11k_pci 0000:72:00.0: fw_version 0x101c06cc 
fw_build_timestamp 2020-06-24 19:50 fw_build_id
[    6.378909] Loading firmware: ath11k/QCA6390/hw2.0/board-2.bin
[    6.394521] Loading firmware: ath11k/QCA6390/hw2.0/m3.bin
rmmod ath11k_pci
[  100.322300] ath11k_pci 0000:72:00.0: link down error during global reset
[  100.322472] DMAR: DRHD: handling fault status reg 2
[  100.322491] DMAR: [INTR-REMAP] Request device [0x72:0x00.0] fault 
index 0x60 [fault reason 0x22] Present field in the IRTE entry is clear
modprobe ath11k_pci
[  235.222223] ath11k_pci 0000:72:00.0: BAR 0: assigned [mem 
0xa2500000-0xa25fffff 64bit]
[  235.223161] ath11k_pci 0000:72:00.0: qca6390 hw2.0
[  235.379984] mhi mhi0: Requested to power ON
[  235.380244] mhi mhi0: Power on setup success
[  235.380331] Loading firmware: ath11k/QCA6390/hw2.0/amss.bin
[  235.701567] mhi mhi0: Wait for device to enter SBL or Mission mode

On 07.10.2021 09:22, Kalle Valo wrote:
> Mark Herbert <mark.herbert42 at gmail.com> writes:
>
>> Dear ath11k team,
>>
>> The main issue is I can not hibernate and wake up my XPS 13 9310.  If
>> I keep module loaded it hibernate. Bu hangs on resume.
> Just to avoid confusions with terminology, with hibernate you mean
> storing the system state to a disk and completely powering off the
> laptop?
>
> I assume hibernation fails because ath11k keeps the firmware running
> during suspend and ath11k is not able to recover if the firmware is dead
> during resume.
>
> Can you file a bug about this, instructions here:
>
> https://wireless.wiki.kernel.org/en/users/drivers/ath11k/bugreport
>
>> If I unload module - it resumes OK but there is no chance to have WIFI
>> back without reboot.
>>
>> If I do rmmod ath11k_pci - it shows errors in dmesg:
>>
>> [   48.801504] ath11k_pci 0000:72:00.0: link down error during global reset
>> [   48.801700] DMAR: DRHD: handling fault status reg 2
>> [   48.801709] DMAR: [INTR-REMAP] Request device [0x72:0x00.0] fault
>> index 0x60 [fault reason 0x22] Present field in the IRTE entry is
>> clear
>>
>> If I do modprobe immediately it does load module but card will not
>> come back again.
>>
>> In Arch wiki reloading modules was explained as a workaround to
>> suspend-resume 9310, but looks like it does not work anymore. Suspend
>> to idle works fine - no module unloading needed.
> I have an XPS 13 9310 as well but I can't test this right now. Can you
> provide more information about the card not getting back after modprobe?
> What exact kernel and BIOS versions are you using? What log messages you
> get from ath11k? Preferably the exact commands you use and the output
> you get from ath11k would help a lot to understand what's happening.
>