Re: [PATCH 0/2] ocxl: Move SPA and TL definitions

[christophe lombard <clombard@linux.vnet.ibm.com>]

On 11/10/2019 00:34, Andrew Donnellan wrote:
> On 10/10/19 2:11 am, christophe lombard wrote:
>> This series moves the definition and the management of scheduled 
>> process area
>> (SPA) and of the templates (Transaction Layer) for an ocxl card, using 
>> the
>> OCAPI interface. The code is now located in the specific arch powerpc 
>> platform.
>> These patches will help for a futur implementation of the ocxl driver 
>> in QEMU.
> 
> Could you explain more about this?
> 

The Scheduled Processes Area and the configuration of the Transaction
Layer are specific to the AFU and more generally to the Opencapi
device.
Running the ocxl module in a guest environment, and later in several 
guests in parallel, using the same Opencapi device and the same AFus, 
involves to have a common code handling the SPA. This explains why these 
parts of the ocxl driver will move to arch powerpc platform running on 
the host.

Thanks.


> 
> Andrew
> 
> 
>>
>> The Open Coherently Attached Processor Interface (OCAPI) is used to
>> allow an Attached Functional Unit (AFU) to connect to the Processor
>> Chip's system bus in a high speed and cache coherent manner.
>>
>> It builds on top of the existing ocxl driver.
>>
>> It has been tested in a bare-metal environment using the memcpy and
>> the AFP AFUs.
>>
>> christophe lombard (2):
>>    powerpc/powernv: ocxl move SPA definition
>>    powerpc/powernv: ocxl move TL definition
>>
>>   arch/powerpc/include/asm/pnv-ocxl.h   |  30 +-
>>   arch/powerpc/platforms/powernv/ocxl.c | 378 +++++++++++++++++++++++---
>>   drivers/misc/ocxl/afu_irq.c           |   1 -
>>   drivers/misc/ocxl/config.c            |  89 +-----
>>   drivers/misc/ocxl/link.c              | 347 +++++++----------------
>>   drivers/misc/ocxl/ocxl_internal.h     |  12 -
>>   drivers/misc/ocxl/trace.h             |  34 +--
>>   7 files changed, 467 insertions(+), 424 deletions(-)
>>
>