[PATCH v2] accel/ivpu: Fix DevTLB errors on suspend/resume and recovery

[Jacek Lawrynowicz]

Hi,

On 09.02.2024 16:39, Jeffrey Hugo wrote:
> On 2/7/2024 3:24 AM, Jacek Lawrynowicz wrote:
>> Issue IP reset before shutdown in order to
>> complete all upstream requests to the SOC.
>> Without this DevTLB is complaining about
>> incomplete transactions and NPU cannot resume from
>> suspend.
>> This problem is only happening on recent IFWI
>> releases.
>>
>> IP reset in rare corner cases can mess up PCI
>> configuration, so save it before the reset.
>> After this happens it is also impossible to
>> issue PLL requests and D0->D3->D0 cycle is needed
>> to recover the NPU. Add WP 0 request on power up,
>> so the PUNIT is always notified about NPU reset.
>>
>> Use D0/D3 cycle for recovery as it can recover
>> from failed IP reset and FLR cannot.
>>
>> Fixes: 3f7c0634926d ("accel/ivpu/37xx: Fix hangs related to MMIO reset")
>> Signed-off-by: Jacek Lawrynowicz <jacek.lawrynowicz at linux.intel.com>
>> ---
> 
> Reviewed-by: Jeffrey Hugo <quic_jhugo at quicinc.com>
> 
> Nit below
> 

>>       ret = ivpu_shutdown(vdev);
>> -    if (ret) {
>> +    if (ret)
>>           ivpu_err(vdev, "Failed to shutdown VPU: %d\n", ret);
> 
> In the two logs you add in this change, the log has "NPU".  Here, there is "VPU".  As far as I understand VPU is the old term and NPU is the new term therefore it seems like all the logs should be updated to use the new term for consistency.  Outside of scope for this change though.

Ok, I will fix this in next patchset.

Thanks,
Jacek