netdev - Re: [PATCH net-next v2 2/6] sfc: add notion of match on enc keys to MAE machinery

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Date:   Mon, 27 Mar 2023 09:20:06 +0100
From:   Edward Cree <ecree.xilinx@...il.com>
To:     Simon Horman <simon.horman@...igine.com>, edward.cree@....com
Cc:     linux-net-drivers@....com, davem@...emloft.net, kuba@...nel.org,
        pabeni@...hat.com, edumazet@...gle.com, netdev@...r.kernel.org,
        habetsm.xilinx@...il.com, michal.swiatkowski@...ux.intel.com
Subject: Re: [PATCH net-next v2 2/6] sfc: add notion of match on enc keys to
 MAE machinery

On 25/03/2023 12:03, Simon Horman wrote:
> Hi Edward,
> 
> Looks good to me.
> A few minor comments inline.
> 
> On Thu, Mar 23, 2023 at 08:45:10PM +0000, edward.cree@....com wrote:
>> From: Edward Cree <ecree.xilinx@...il.com>
>>
>> Extend the MAE caps check to validate that the hardware supports used
>>  outer-header matches.
> 
> s/used// ?

I think I meant it in the sense of "the outer-header matches which
 are used by the driver"; I can definitely reword it to spell that
 out better.

>>  int efx_mae_allocate_counter(struct efx_nic *efx, struct efx_tc_counter *cnt)
>>  {
>>  	MCDI_DECLARE_BUF(outbuf, MC_CMD_MAE_COUNTER_ALLOC_OUT_LEN(1));
>> @@ -941,6 +1011,29 @@ static int efx_mae_populate_match_criteria(MCDI_DECLARE_STRUCT_PTR(match_crit),
>>  				match->value.tcp_flags);
>>  	MCDI_STRUCT_SET_WORD_BE(match_crit, MAE_FIELD_MASK_VALUE_PAIRS_V2_TCP_FLAGS_BE_MASK,
>>  				match->mask.tcp_flags);
>> +	/* enc-keys are handled indirectly, through encap_match ID */
>> +	if (match->encap) {
>> +		MCDI_STRUCT_SET_DWORD(match_crit, MAE_FIELD_MASK_VALUE_PAIRS_V2_OUTER_RULE_ID,
>> +				      match->encap->fw_id);
>> +		MCDI_STRUCT_SET_DWORD(match_crit, MAE_FIELD_MASK_VALUE_PAIRS_V2_OUTER_RULE_ID_MASK,
>> +				      U32_MAX);
>> +		/* enc_keyid (VNI/VSID) is not part of the encap_match */
>> +		MCDI_STRUCT_SET_DWORD_BE(match_crit, MAE_FIELD_MASK_VALUE_PAIRS_V2_ENC_VNET_ID_BE,
>> +					 match->value.enc_keyid);
>> +		MCDI_STRUCT_SET_DWORD_BE(match_crit, MAE_FIELD_MASK_VALUE_PAIRS_V2_ENC_VNET_ID_BE_MASK,
>> +					 match->mask.enc_keyid);
> 
> Is it intentional that value.enc_keyid is used as the mask.

But it isn't.  mask.enc_keyid is.