linux-kernel - Re: [PATCH iwl-next 1/2] i40e: Remove VF MAC types

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Message-ID: <6cb52295-a20c-47ae-b75e-c841f665fdaf@intel.com>
Date:   Wed, 25 Oct 2023 14:27:09 +0200
From:   Wojciech Drewek <wojciech.drewek@...el.com>
To:     Jiri Pirko <jiri@...nulli.us>
CC:     Ivan Vecera <ivecera@...hat.com>, <netdev@...r.kernel.org>,
        "Jesse Brandeburg" <jesse.brandeburg@...el.com>,
        Tony Nguyen <anthony.l.nguyen@...el.com>,
        "David S. Miller" <davem@...emloft.net>,
        "Eric Dumazet" <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        <intel-wired-lan@...ts.osuosl.org>, <linux-kernel@...r.kernel.org>,
        Jacob Keller <jacob.e.keller@...el.com>
Subject: Re: [PATCH iwl-next 1/2] i40e: Remove VF MAC types



On 25.10.2023 14:20, Jiri Pirko wrote:
> Wed, Oct 25, 2023 at 02:16:39PM CEST, jiri@...nulli.us wrote:
>> Wed, Oct 25, 2023 at 12:48:37PM CEST, wojciech.drewek@...el.com wrote:
>>>
>>>
>>> On 25.10.2023 12:33, Ivan Vecera wrote:
>>>> The i40e_hw.mac.type cannot to be equal to I40E_MAC_VF or
>>>> I40E_MAC_X722_VF so remove helper i40e_is_vf(), simplify
>>>> i40e_adminq_init_regs() and remove enums for these VF MAC types.
>>>>
>>>> Signed-off-by: Ivan Vecera <ivecera@...hat.com>
>>>> ---
>>>>  drivers/net/ethernet/intel/i40e/i40e_adminq.c | 33 ++++++-------------
>>>>  drivers/net/ethernet/intel/i40e/i40e_type.h   |  8 -----
>>>>  2 files changed, 10 insertions(+), 31 deletions(-)
>>>>
>>>> diff --git a/drivers/net/ethernet/intel/i40e/i40e_adminq.c b/drivers/net/ethernet/intel/i40e/i40e_adminq.c
>>>> index 29fc46abf690..896c43905309 100644
>>>> --- a/drivers/net/ethernet/intel/i40e/i40e_adminq.c
>>>> +++ b/drivers/net/ethernet/intel/i40e/i40e_adminq.c
>>>> @@ -17,29 +17,16 @@ static void i40e_resume_aq(struct i40e_hw *hw);
>>>>  static void i40e_adminq_init_regs(struct i40e_hw *hw)
>>>>  {
>>>>  	/* set head and tail registers in our local struct */
>>>> -	if (i40e_is_vf(hw)) {
>>>> -		hw->aq.asq.tail = I40E_VF_ATQT1;
>>>> -		hw->aq.asq.head = I40E_VF_ATQH1;
>>>> -		hw->aq.asq.len  = I40E_VF_ATQLEN1;
>>>> -		hw->aq.asq.bal  = I40E_VF_ATQBAL1;
>>>> -		hw->aq.asq.bah  = I40E_VF_ATQBAH1;
>>>> -		hw->aq.arq.tail = I40E_VF_ARQT1;
>>>> -		hw->aq.arq.head = I40E_VF_ARQH1;
>>>> -		hw->aq.arq.len  = I40E_VF_ARQLEN1;
>>>> -		hw->aq.arq.bal  = I40E_VF_ARQBAL1;
>>>> -		hw->aq.arq.bah  = I40E_VF_ARQBAH1;
>>>
>>> What about removing those I40E_VF_* defines?
>>> This is their only usage here, right?
>>
>> Wait, do you suggest to use the values directly? That would be
>> wild even for i40e :)
> 
> Ah, sec. This is duplicated in
> drivers/net/ethernet/intel/iavf/iavf_register.h. That confused me.

Indeed, in case of i40e they're going be unused after this patch so
there is no point in keeping them, I think.

> 
> 
> 
>>
>>
>>>
>>>> -	} else {
>>>> -		hw->aq.asq.tail = I40E_PF_ATQT;
>>>> -		hw->aq.asq.head = I40E_PF_ATQH;
>>>> -		hw->aq.asq.len  = I40E_PF_ATQLEN;
>>>> -		hw->aq.asq.bal  = I40E_PF_ATQBAL;
>>>> -		hw->aq.asq.bah  = I40E_PF_ATQBAH;
>>>> -		hw->aq.arq.tail = I40E_PF_ARQT;
>>>> -		hw->aq.arq.head = I40E_PF_ARQH;
>>>> -		hw->aq.arq.len  = I40E_PF_ARQLEN;
>>>> -		hw->aq.arq.bal  = I40E_PF_ARQBAL;
>>>> -		hw->aq.arq.bah  = I40E_PF_ARQBAH;
>>>> -	}
>>>> +	hw->aq.asq.tail = I40E_PF_ATQT;
>>>> +	hw->aq.asq.head = I40E_PF_ATQH;
>>>> +	hw->aq.asq.len  = I40E_PF_ATQLEN;
>>>> +	hw->aq.asq.bal  = I40E_PF_ATQBAL;
>>>> +	hw->aq.asq.bah  = I40E_PF_ATQBAH;
>>>> +	hw->aq.arq.tail = I40E_PF_ARQT;
>>>> +	hw->aq.arq.head = I40E_PF_ARQH;
>>>> +	hw->aq.arq.len  = I40E_PF_ARQLEN;
>>>> +	hw->aq.arq.bal  = I40E_PF_ARQBAL;
>>>> +	hw->aq.arq.bah  = I40E_PF_ARQBAH;
>>>>  }
>>>>  
>>>>  /**
>>>> diff --git a/drivers/net/ethernet/intel/i40e/i40e_type.h b/drivers/net/ethernet/intel/i40e/i40e_type.h
>>>> index 9fda0cb6bdbe..7eaf8b013125 100644
>>>> --- a/drivers/net/ethernet/intel/i40e/i40e_type.h
>>>> +++ b/drivers/net/ethernet/intel/i40e/i40e_type.h
>>>> @@ -64,9 +64,7 @@ typedef void (*I40E_ADMINQ_CALLBACK)(struct i40e_hw *, struct i40e_aq_desc *);
>>>>  enum i40e_mac_type {
>>>>  	I40E_MAC_UNKNOWN = 0,
>>>>  	I40E_MAC_XL710,
>>>> -	I40E_MAC_VF,
>>>>  	I40E_MAC_X722,
>>>> -	I40E_MAC_X722_VF,
>>>>  	I40E_MAC_GENERIC,
>>>>  };
>>>>  
>>>> @@ -588,12 +586,6 @@ struct i40e_hw {
>>>>  	char err_str[16];
>>>>  };
>>>>  
>>>> -static inline bool i40e_is_vf(struct i40e_hw *hw)
>>>> -{
>>>> -	return (hw->mac.type == I40E_MAC_VF ||
>>>> -		hw->mac.type == I40E_MAC_X722_VF);
>>>> -}
>>>> -
>>>>  /**
>>>>   * i40e_is_aq_api_ver_ge
>>>>   * @hw: pointer to i40e_hw structure
>>>