Re: [PATCH v6 1/2] mctp pcc: Check before sending MCTP PCC response ACK

[Adam Young <admiyo@amperemail.onmicrosoft.com>]

On 11/3/24 22:17, lihuisong (C) wrote:
>>
>> I could make a further  change and allow the driver to request the 
>> remapped memory segment from the pcc layer, and couple  to the 
>> memory-remap to the client/channel.  It seems like that code, too, 
>> should be in the common layer.  However most drivers would not know 
>> to use  this function yet, so the mechanism would have to be 
>> optional, and only clean up if called this way.
> I agree this method.
> Don't remap twice for one shared memory.
> This remaping is reasonable in PCC layer. We can let PCC client to 
> decide if PCC layer does remap and then they use it directly.
> For new driver like the driver you are uploading, driver can give PCC 
> one flag to tell PCC layer remap when request channel.
> For old PCC client driver, do not send this flag, PPC layer do not 
> remap. So no any impact on them. 


I think we are actually in agreement here.  No double mapping, but the 
driver MAY request the mapping happen in the PCC layer. No impact on 
existing drivers.