[Intel-gfx] [PATCH] drm/i915/guc: Update to GuC FW v40

[John Harrison]

On 1/15/2020 11:45, Daniele Ceraolo Spurio wrote:
> On 1/14/20 6:40 PM, John.C.Harrison at Intel.com wrote:
>> From: Matthew Brost <matthew.brost at intel.com>
>>
>> The GuC major version has jumped from 35 to 40. This is because this
>> FW includes a significant re-write of the API that completely breaks
>> backwards compatibility for command submission. This patch is
>> sufficient to enable loading of the GuC and hence authentication of
>> the HuC. Support of command submission will follow in a much larger
>> patch series.
>>
>> The changes required to load v40 FW are:
>> * An additional data structure and associated 'private_data' pointer
>> are now required to be setup by the driver. This is basically a
>> scratch area of memory that the GuC owns. The size is read from the
>> CSS header.
>>
>> * A physical to logical engine mapping table is required to be
>> provided in the GuC additional data structure. This is initialized
>> with a 1 to 1 mapping.
>>
>> * GUC_CTL_CTXINFO has been removed from the initialization params.
>>
>
> You're missing the removal of ads.reg_state_buffer, which is several 
> page of memory we can now save. Michal has floated a patch for that 
> internally.
>
> Daniele
>
Yes, I just noticed that a little earlier. Already in the process of 
squashing it in.

John.