netdev - Re: [PATCH iwl-next v1 13/13] ice: field get conversion

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Date: Wed, 29 Nov 2023 14:31:53 -0800
From: Jesse Brandeburg <jesse.brandeburg@...el.com>
To: Simon Horman <horms@...nel.org>, Tony Nguyen <anthony.l.nguyen@...el.com>
CC: <intel-wired-lan@...ts.osuosl.org>, <netdev@...r.kernel.org>, Julia Lawall
	<Julia.Lawall@...ia.fr>, Marcin Szycik <marcin.szycik@...ux.intel.com>
Subject: Re: [PATCH iwl-next v1 13/13] ice: field get conversion

On 11/24/2023 3:03 AM, Simon Horman wrote:
> On Tue, Nov 21, 2023 at 01:19:21PM -0800, Jesse Brandeburg wrote:
>> Refactor the ice driver to use FIELD_GET() for mask and shift reads,
>> which reduces lines of code and adds clarity of intent.
>>
>> This code was generated by the following coccinelle/spatch script and
>> then manually repaired.
>>
>> @get@
>> constant shift,mask;
>> type T;
>> expression a;
>> @@
>> -(((T)(a) & mask) >> shift)
>> +FIELD_GET(mask, a)
>>
>> and applied via:
>> spatch --sp-file field_prep.cocci --in-place --dir \
>>  drivers/net/ethernet/intel/
>>
>> Cc: Julia Lawall <Julia.Lawall@...ia.fr>
>> Reviewed-by: Marcin Szycik <marcin.szycik@...ux.intel.com>
>> Signed-off-by: Jesse Brandeburg <jesse.brandeburg@...el.com>
> 
> Reviewed-by: Simon Horman <horms@...nel.org>
> 

thanks for the review Simon! I wanted to note here, I found a small fix
was needed to the code while doing further review and testing on this patch.

<pasted as quote below>

> diff --git a/drivers/net/ethernet/intel/ice/ice_dcb.c b/drivers/net/ethernet/intel/ice/ice_dcb.c
> index 7f3e00c187b4..74418c445cc4 100644
> --- a/drivers/net/ethernet/intel/ice/ice_dcb.c
> +++ b/drivers/net/ethernet/intel/ice/ice_dcb.c
> @@ -967,7 +967,7 @@ void ice_get_dcb_cfg_from_mib_change(struct ice_port_info *pi,
> 
>         mib = (struct ice_aqc_lldp_get_mib *)&event->desc.params.raw;
> 
> -       change_type = FIELD_GET(ICE_AQ_LLDP_MIB_TYPE_M,  mib->type);
> +       change_type = FIELD_GET(ICE_AQ_LLDP_MIB_TYPE_M, mib->type);
>         if (change_type == ICE_AQ_LLDP_MIB_REMOTE)
>                 dcbx_cfg = &pi->qos_cfg.remote_dcbx_cfg;
> 
> diff --git a/drivers/net/ethernet/intel/ice/ice_lib.c b/drivers/net/ethernet/intel/ice/ice_lib.c
> index 8cdd53412748..d1c1e53fe15c 100644
> --- a/drivers/net/ethernet/intel/ice/ice_lib.c
> +++ b/drivers/net/ethernet/intel/ice/ice_lib.c
> @@ -974,8 +974,8 @@ static void ice_set_dflt_vsi_ctx(struct ice_hw *hw, struct ice_vsi_ctx *ctxt)
>         /* Traffic from VSI can be sent to LAN */
>         ctxt->info.sw_flags2 = ICE_AQ_VSI_SW_FLAG_LAN_ENA;
>         /* allow all untagged/tagged packets by default on Tx */
> -       ctxt->info.inner_vlan_flags = FIELD_GET(ICE_AQ_VSI_INNER_VLAN_TX_MODE_M,
> -                                               ICE_AQ_VSI_INNER_VLAN_TX_MODE_ALL);
> +       ctxt->info.inner_vlan_flags = FIELD_PREP(ICE_AQ_VSI_INNER_VLAN_TX_MODE_M,
> +                                                ICE_AQ_VSI_INNER_VLAN_TX_MODE_ALL);
>         /* SVM - by default bits 3 and 4 in inner_vlan_flags are 0's which
>          * results in legacy behavior (show VLAN, DEI, and UP) in descriptor.
>          *

I'll work with Tony to get the fixes above applied before he relays the
patch upstream as a pull request.