linux-kernel - Re: [PATCH 2/2] fpga: add cancel() and get

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Date:   Thu, 20 May 2021 06:39:09 -0700
From:   Tom Rix <trix@...hat.com>
To:     Moritz Fischer <mdf@...nel.org>,
        Russ Weight <russell.h.weight@...el.com>
Cc:     linux-fpga@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/2] fpga: add cancel() and get_error() to update ops


On 5/19/21 1:50 PM, Moritz Fischer wrote:
> Tom,
>
> On Wed, May 19, 2021 at 01:43:18PM -0700, trix@...hat.com wrote:
>> From: Tom Rix <trix@...hat.com>
>>
>> A user may want to cancel an update or get
>> more information on when an update fails.
>> Add some device ops to do these.
>>
>> Signed-off-by: Tom Rix <trix@...hat.com>
>> ---
>>   include/linux/fpga/fpga-mgr.h | 4 ++++
>>   1 file changed, 4 insertions(+)
>>
>> diff --git a/include/linux/fpga/fpga-mgr.h b/include/linux/fpga/fpga-mgr.h
>> index ab68280f3b4a4..31d6ebc34d87a 100644
>> --- a/include/linux/fpga/fpga-mgr.h
>> +++ b/include/linux/fpga/fpga-mgr.h
>> @@ -111,6 +111,8 @@ struct fpga_image_info {
>>    * @write: write count bytes of configuration data to the FPGA
>>    * @write_sg: write the scatter list of configuration data to the FPGA
>>    * @write_complete: set FPGA to operating state after writing is done
>> + * @cancel: cancel the update
>> + * @get_error: get extended error information
>>    */
>>   struct fpga_manager_update_ops {
>>   	int (*write_init)(struct fpga_manager *mgr,
>> @@ -120,6 +122,8 @@ struct fpga_manager_update_ops {
>>   	int (*write_sg)(struct fpga_manager *mgr, struct sg_table *sgt);
>>   	int (*write_complete)(struct fpga_manager *mgr,
>>   			      struct fpga_image_info *info);
>> +	int (*cancel)(struct fpga_manager *mgr);
>> +	int (*get_error)(struct fpga_manager *mgr, u64 *err);
>>   };
>>   
>>   /**
>> -- 
>> 2.26.3
>>
> There is no user for this, so if we add this, we add it with code
> calling it.

These additions come for unioning the fpga manager ops with the secure 
manager ops.

So will be needed if the secure manager goes this this way.

Tom

> Thanks
>
> - Moritz
>