linux-kernel - RE: [PATCH net-next] net: mana: Add RX fencing

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Message-ID: <BN8PR21MB1284192697C792E80D53233BCA779@BN8PR21MB1284.namprd21.prod.outlook.com>
Date:   Thu, 16 Dec 2021 16:44:44 +0000
From:   Haiyang Zhang <haiyangz@...rosoft.com>
To:     Dexuan Cui <decui@...rosoft.com>,
        "davem@...emloft.net" <davem@...emloft.net>,
        "kuba@...nel.org" <kuba@...nel.org>,
        "gustavoars@...nel.org" <gustavoars@...nel.org>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>
CC:     KY Srinivasan <kys@...rosoft.com>,
        "stephen@...workplumber.org" <stephen@...workplumber.org>,
        "wei.liu@...nel.org" <wei.liu@...nel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-hyperv@...r.kernel.org" <linux-hyperv@...r.kernel.org>,
        Shachar Raindel <shacharr@...rosoft.com>,
        Paul Rosswurm <paulros@...rosoft.com>,
        "olaf@...fle.de" <olaf@...fle.de>, vkuznets <vkuznets@...hat.com>
Subject: RE: [PATCH net-next] net: mana: Add RX fencing



> -----Original Message-----
> From: Dexuan Cui <decui@...rosoft.com>
> Sent: Wednesday, December 15, 2021 7:18 PM
> To: davem@...emloft.net; kuba@...nel.org; gustavoars@...nel.org; Haiyang Zhang
> <haiyangz@...rosoft.com>; netdev@...r.kernel.org
> Cc: KY Srinivasan <kys@...rosoft.com>; stephen@...workplumber.org; wei.liu@...nel.org;
> linux-kernel@...r.kernel.org; linux-hyperv@...r.kernel.org; Shachar Raindel
> <shacharr@...rosoft.com>; Paul Rosswurm <paulros@...rosoft.com>; olaf@...fle.de; vkuznets
> <vkuznets@...hat.com>; Dexuan Cui <decui@...rosoft.com>
> Subject: [PATCH net-next] net: mana: Add RX fencing
> 
> RX fencing allows the driver to know that any prior change to the RQs has
> finished, e.g. when the RQs are disabled/enabled or the hashkey/indirection
> table are changed, RX fencing is required.
> 
> Remove the previous workaround "ssleep(1)" and add the real support for
> RX fencing as the PF driver supports the MANA_FENCE_RQ request now (any
> old PF driver not supporting the request won't be used in production).
> 
> Signed-off-by: Dexuan Cui <decui@...rosoft.com>
> ---
>  drivers/net/ethernet/microsoft/mana/mana.h    |  2 +
>  drivers/net/ethernet/microsoft/mana/mana_en.c | 69 +++++++++++++++++--
>  2 files changed, 66 insertions(+), 5 deletions(-)
> 

Reviewed-by: Haiyang Zhang <haiyangz@...rosoft.com>

Thanks!