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Date:   Wed, 14 Mar 2018 03:07:09 +0000
From:   "Brown, Aaron F" <aaron.f.brown@...el.com>
To:     "Gomes, Vinicius" <vinicius.gomes@...el.com>,
        "intel-wired-lan@...ts.osuosl.org" <intel-wired-lan@...ts.osuosl.org>
CC:     "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "Sanchez-Palencia, Jesus" <jesus.sanchez-palencia@...el.com>
Subject: RE: [Intel-wired-lan] [next-queue PATCH v4 2/8] igb: Fix queue
 selection on MAC filters on i210 and i211

> From: Intel-wired-lan [mailto:intel-wired-lan-bounces@...osl.org] On
> Behalf Of Vinicius Costa Gomes
> Sent: Wednesday, March 7, 2018 4:37 PM
> To: intel-wired-lan@...ts.osuosl.org
> Cc: netdev@...r.kernel.org; Sanchez-Palencia, Jesus <jesus.sanchez-
> palencia@...el.com>
> Subject: [Intel-wired-lan] [next-queue PATCH v4 2/8] igb: Fix queue selection
> on MAC filters on i210 and i211
> 
> On the RAH registers there are semantic differences on the meaning of
> the "queue" parameter for traffic steering depending on the controller
> model: there is the 82575 meaning, which "queue" means a RX Hardware
> Queue, and the i350 meaning, where it is a reception pool.
> 
> The previous behaviour was having no effect for i210 and i211 based
> controllers because the QSEL bit of the RAH register wasn't being set.
> 
> This patch separates the condition in discrete cases, so the different
> handling is clearer.
> 
> Fixes: 83c21335c876 ("igb: improve MAC filter handling")
> Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@...el.com>
> ---
>  drivers/net/ethernet/intel/igb/e1000_defines.h |  1 +
>  drivers/net/ethernet/intel/igb/igb_main.c      | 15 +++++++++++----
>  2 files changed, 12 insertions(+), 4 deletions(-)
> 
> diff --git a/drivers/net/ethernet/intel/igb/e1000_defines.h
> b/drivers/net/ethernet/intel/igb/e1000_defines.h
> index 83cabff1e0ab..573bf177fd08 100644
> --- a/drivers/net/ethernet/intel/igb/e1000_defines.h
> +++ b/drivers/net/ethernet/intel/igb/e1000_defines.h
> @@ -490,6 +490,7 @@
>   * manageability enabled, allowing us room for 15 multicast addresses.
>   */
>  #define E1000_RAH_AV  0x80000000        /* Receive descriptor valid */
> +#define E1000_RAH_QSEL_ENABLE 0x10000000
>  #define E1000_RAL_MAC_ADDR_LEN 4
>  #define E1000_RAH_MAC_ADDR_LEN 2
>  #define E1000_RAH_POOL_MASK 0x03FC0000
> diff --git a/drivers/net/ethernet/intel/igb/igb_main.c
> b/drivers/net/ethernet/intel/igb/igb_main.c
> index 715bb32e6901..eabedc6b6518 100644
> --- a/drivers/net/ethernet/intel/igb/igb_main.c
> +++ b/drivers/net/ethernet/intel/igb/igb_main.c
> @@ -8747,12 +8747,19 @@ static void igb_rar_set_index(struct igb_adapter
> *adapter, u32 index)
>  		if (is_valid_ether_addr(addr))
>  			rar_high |= E1000_RAH_AV;
> 
> -		if (hw->mac.type == e1000_82575)
> +		switch (hw->mac.type) {
> +		case e1000_82575:
> +		case e1000_i210:
> +		case e1000_i211:
> +			rar_high |= E1000_RAH_QSEL_ENABLE;
>  			rar_high |= E1000_RAH_POOL_1 *
> -				    adapter->mac_table[index].queue;
> -		else
> +				      adapter->mac_table[index].queue;
> +			break;
> +		default:
>  			rar_high |= E1000_RAH_POOL_1 <<
> -				    adapter->mac_table[index].queue;
> +				adapter->mac_table[index].queue;

Small nit.  Shouldn't this line be indented more to be a few spaces past the "|=" operator as above?

> +			break;
> +		}
>  	}
> 
>  	wr32(E1000_RAL(index), rar_low);
> --
> 2.16.2
> 
> _______________________________________________
> Intel-wired-lan mailing list
> Intel-wired-lan@...osl.org
> https://lists.osuosl.org/mailman/listinfo/intel-wired-lan

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