Re: [PATCH v6 00/24] nova-core: run FWSEC-FRTS to perform first stage of GSP initialization

[Alexandre Courbot]

On Tue Jul 1, 2025 at 12:43 AM JST, Danilo Krummrich wrote:
> On 6/24/25 4:56 AM, Alexandre Courbot wrote:
>> On Tue Jun 24, 2025 at 6:01 AM JST, Danilo Krummrich wrote:
>>> There's one thing that would be nice to fix subsequently, which is properly
>>> resetting the GPU. Currently, it needs a power cycle to be able to probe
>>> successfully after unbinding the driver.
>> 
>> Yes, what I usually do is the following after unloading Nova:
>> 
>>      echo 1 | sudo tee /sys/bus/pci/devices/0000:01:00.0/reset
>> 
>> and this allows it to probe again. Maybe we want to add some equivalent
>> programmatically in the driver probe function?
>
> Probably -- how are things implemented on the GPU side of things? Is the GPU
> firmware surviving a FLR?

After a FLR all firmware is cleared and the WPR2 region is wiped,
meaning GPU initialization has to be done again from the very beginning.