linux-kernel - RE: [Intel-wired-lan] [PATCH iwl-next] i40e: Remove queue tracking fields from i40e_adminq

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Message-ID: <BL0PR11MB31229A88DF87AE89F2D50E47BDA8A@BL0PR11MB3122.namprd11.prod.outlook.com>
Date:   Wed, 8 Nov 2023 05:19:11 +0000
From:   "Pucha, HimasekharX Reddy" <himasekharx.reddy.pucha@...el.com>
To:     ivecera <ivecera@...hat.com>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>
CC:     "Drewek, Wojciech" <wojciech.drewek@...el.com>,
        "intel-wired-lan@...ts.osuosl.org" <intel-wired-lan@...ts.osuosl.org>,
        "Brandeburg, Jesse" <jesse.brandeburg@...el.com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Eric Dumazet <edumazet@...gle.com>,
        "Nguyen, Anthony L" <anthony.l.nguyen@...el.com>,
        "Keller, Jacob E" <jacob.e.keller@...el.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        "David S. Miller" <davem@...emloft.net>
Subject: RE: [Intel-wired-lan] [PATCH iwl-next] i40e: Remove queue tracking
 fields from i40e_adminq_ring

> -----Original Message-----
> From: Intel-wired-lan <intel-wired-lan-bounces@...osl.org> On Behalf Of Ivan Vecera
> Sent: Thursday, October 26, 2023 2:09 PM
> To: netdev@...r.kernel.org
> Cc: Drewek, Wojciech <wojciech.drewek@...el.com>; intel-wired-lan@...ts.osuosl.org; Brandeburg, Jesse <jesse.brandeburg@...el.com>; linux-kernel@...r.kernel.org; Eric Dumazet <edumazet@...gle.com>; Nguyen, Anthony L <anthony.l.nguyen@...el.com>; Keller, Jacob E <jacob.e.keller@...el.com>; Jakub Kicinski <kuba@...nel.org>; Paolo Abeni <pabeni@...hat.com>; David S. Miller <davem@...emloft.net>
> Subject: [Intel-wired-lan] [PATCH iwl-next] i40e: Remove queue tracking fields from i40e_adminq_ring
>
> Fields 'head', 'tail', 'len', 'bah' and 'bal' in i40e_adminq_ring
> are used to store register offsets. These offsets are initialized
> and remains constant so there is no need to store them in the
> i40e_adminq_ring structure.
>
> Remove these fields from i40e_adminq_ring and use register offset
> constants instead. Remove i40e_adminq_init_regs() that originally
> stores these constants into these fields.
>
> Finally improve i40e_check_asq_alive() that assumes that
> non-zero value of hw->aq.asq.len indicates fully initialized
> AdminQ send queue. Replace it by check for non-zero value
> of field hw->aq.asq.count that is non-zero when the sending
> queue is initialized and is zeroed during shutdown of
> the queue.
>
> Signed-off-by: Ivan Vecera <ivecera@...hat.com>
> ---
>  drivers/net/ethernet/intel/i40e/i40e_adminq.c | 86 +++++++------------
>  drivers/net/ethernet/intel/i40e/i40e_adminq.h |  7 --
>  drivers/net/ethernet/intel/i40e/i40e_common.c |  8 +-
>  drivers/net/ethernet/intel/i40e/i40e_main.c   |  8 +-
>  4 files changed, 39 insertions(+), 70 deletions(-)
>

Tested-by: Pucha Himasekhar Reddy <himasekharx.reddy.pucha@...el.com> (A Contingent worker at Intel)