Re: [PATCH V3 0/7] cxl: Add support for Coherent Accelerator Interface Architecture 2.0

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

Le 30/03/2017 à 06:44, Andrew Donnellan a écrit :
> On 29/03/17 02:14, Christophe Lombard wrote:
>> This series adds support for a cxl card which supports the Coherent
>> Accelerator Interface Architecture 2.0.
>>
>> It requires IBM Power9 system and the Power Service Layer, version 9.
>> The PSL provides the address translation and system memory cache for
>> CAIA compliant Accelerators.
>> the PSL attaches to the IBM Processor chip through the PCIe link using
>> the PSL-specific “CAPI Protocol” Transaction Layer Packets.
>> The PSL and CAPP communicate using PowerBus packets.
>> When using a PCIe link the PCIe Host Bridge (PHB) decodes the CAPI
>> Protocol Packets from the PSL and forwards them as PowerBus data
>> packets. The PSL also has an optional DMA feature which allows the AFU
>> to send native PCIe reads and writes to the Processor.
>
> Today Mikey reminded me that Documentation/powerpc/cxl.txt still 
> exists - we probably ought to update it.
>

right. good point. thanks