linux-kernel - Re: [PATCH V2 net 04/20] net/ena: fix ethtool RSS flow configuration

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Date:   Mon, 5 Dec 2016 20:26:40 +0200
From:   Netanel Belgazal <netanel@...apurnalabs.com>
To:     Matt Wilson <msw@...n.com>
Cc:     linux-kernel@...r.kernel.org, davem@...emloft.net,
        netdev@...r.kernel.org, dwmw@...zon.com, zorik@...apurnalabs.com,
        alex@...apurnalabs.com, saeed@...apurnalabs.com, msw@...zon.com,
        aliguori@...zon.com, nafea@...apurnalabs.com
Subject: Re: [PATCH V2 net 04/20] net/ena: fix ethtool RSS flow configuration


On 12/05/2016 06:18 AM, Matt Wilson wrote:
> On Sun, Dec 04, 2016 at 03:19:22PM +0200, Netanel Belgazal wrote:
>> ena_flow_data_to_flow_hash and ena_flow_hash_to_flow_type
>> treat the ena_flow_hash_to_flow_type enum as power of two values.
>>
>> Change the values of ena_admin_flow_hash_fields to be power of two values.
> Then I generally prefer BIT(0), BIT(1), BIT(2), etc.

I'll use BIT(x)

>
> Also it would be helpful to include some comments about the
> consequences of the current state of the code.

I'll add explanation.

>
> --msw
>
>> Signed-off-by: Netanel Belgazal <netanel@...apurnalabs.com>
>> ---
>>   drivers/net/ethernet/amazon/ena/ena_admin_defs.h | 12 ++++++------
>>   1 file changed, 6 insertions(+), 6 deletions(-)
>>
>> diff --git a/drivers/net/ethernet/amazon/ena/ena_admin_defs.h b/drivers/net/ethernet/amazon/ena/ena_admin_defs.h
>> index a46e749..f48c886 100644
>> --- a/drivers/net/ethernet/amazon/ena/ena_admin_defs.h
>> +++ b/drivers/net/ethernet/amazon/ena/ena_admin_defs.h
>> @@ -631,22 +631,22 @@ enum ena_admin_flow_hash_proto {
>>   /* RSS flow hash fields */
>>   enum ena_admin_flow_hash_fields {
>>   	/* Ethernet Dest Addr */
>> -	ENA_ADMIN_RSS_L2_DA	= 0,
>> +	ENA_ADMIN_RSS_L2_DA	= 0x1,
>>   
>>   	/* Ethernet Src Addr */
>> -	ENA_ADMIN_RSS_L2_SA	= 1,
>> +	ENA_ADMIN_RSS_L2_SA	= 0x2,
>>   
>>   	/* ipv4/6 Dest Addr */
>> -	ENA_ADMIN_RSS_L3_DA	= 2,
>> +	ENA_ADMIN_RSS_L3_DA	= 0x4,
>>   
>>   	/* ipv4/6 Src Addr */
>> -	ENA_ADMIN_RSS_L3_SA	= 5,
>> +	ENA_ADMIN_RSS_L3_SA	= 0x8,
>>   
>>   	/* tcp/udp Dest Port */
>> -	ENA_ADMIN_RSS_L4_DP	= 6,
>> +	ENA_ADMIN_RSS_L4_DP	= 0x10,
>>   
>>   	/* tcp/udp Src Port */
>> -	ENA_ADMIN_RSS_L4_SP	= 7,
>> +	ENA_ADMIN_RSS_L4_SP	= 0x20,
>>   };
>>   
>>   struct ena_admin_proto_input {