linux-kernel - Re: [PATCH net-next v3 0/5] bridge: mrp: Extend br_mrp_switchdev

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Date:   Wed, 10 Feb 2021 10:08:31 +0000
From:   Vladimir Oltean <vladimir.oltean@....com>
To:     Horatiu Vultur <horatiu.vultur@...rochip.com>
CC:     "jiri@...nulli.us" <jiri@...nulli.us>,
        "ivecera@...hat.com" <ivecera@...hat.com>,
        "davem@...emloft.net" <davem@...emloft.net>,
        "kuba@...nel.org" <kuba@...nel.org>,
        "roopa@...dia.com" <roopa@...dia.com>,
        "nikolay@...dia.com" <nikolay@...dia.com>,
        "rasmus.villemoes@...vas.dk" <rasmus.villemoes@...vas.dk>,
        "andrew@...n.ch" <andrew@...n.ch>,
        Claudiu Manoil <claudiu.manoil@....com>,
        "alexandre.belloni@...tlin.com" <alexandre.belloni@...tlin.com>,
        "UNGLinuxDriver@...rochip.com" <UNGLinuxDriver@...rochip.com>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "bridge@...ts.linux-foundation.org" 
        <bridge@...ts.linux-foundation.org>
Subject: Re: [PATCH net-next v3 0/5] bridge: mrp: Extend br_mrp_switchdev_*

Hi Horatiu,

On Tue, Feb 09, 2021 at 09:21:07PM +0100, Horatiu Vultur wrote:
> This patch series extends MRP switchdev to allow the SW to have a better
> understanding if the HW can implement the MRP functionality or it needs
> to help the HW to run it. There are 3 cases:
> - when HW can't implement at all the functionality.
> - when HW can implement a part of the functionality but needs the SW
>   implement the rest. For example if it can't detect when it stops
>   receiving MRP Test frames but it can copy the MRP frames to CPU to
>   allow the SW to determine this.  Another example is generating the MRP
>   Test frames. If HW can't do that then the SW is used as backup.
> - when HW can implement completely the functionality.
> 
> So, initially the SW tries to offload the entire functionality in HW, if
> that fails it tries offload parts of the functionality in HW and use the
> SW as helper and if also this fails then MRP can't run on this HW.
> 
> Also implement the switchdev calls for Ocelot driver. This is an example
> where the HW can't run completely the functionality but it can help the SW
> to run it, by trapping all MRP frames to CPU.
> 
> v3:
>  - implement the switchdev calls needed by Ocelot driver.
> v2:
>  - fix typos in comments and in commit messages
>  - remove some of the comments
>  - move repeated code in helper function
>  - fix issue when deleting a node when sw_backup was true
> 
> Horatiu Vultur (5):
>   switchdev: mrp: Extend ring_role_mrp and in_role_mrp
>   bridge: mrp: Add 'enum br_mrp_hw_support'
>   bridge: mrp: Extend br_mrp_switchdev to detect better the errors
>   bridge: mrp: Update br_mrp to use new return values of
>     br_mrp_switchdev
>   net: mscc: ocelot: Add support for MRP
> 
>  drivers/net/ethernet/mscc/ocelot_net.c     | 154 +++++++++++++++++++
>  drivers/net/ethernet/mscc/ocelot_vsc7514.c |   6 +
>  include/net/switchdev.h                    |   2 +
>  include/soc/mscc/ocelot.h                  |   6 +
>  net/bridge/br_mrp.c                        |  43 ++++--
>  net/bridge/br_mrp_switchdev.c              | 171 +++++++++++++--------
>  net/bridge/br_private_mrp.h                |  38 +++--
>  7 files changed, 327 insertions(+), 93 deletions(-)
> 
> -- 
> 2.27.0
> 

Which net-next commit can these patches be applied to? On the current
master I get:

Applying: switchdev: mrp: Extend ring_role_mrp and in_role_mrp
Applying: bridge: mrp: Add 'enum br_mrp_hw_support'
Applying: bridge: mrp: Extend br_mrp_switchdev to detect better the errors
error: patch failed: net/bridge/br_mrp_switchdev.c:177
error: net/bridge/br_mrp_switchdev.c: patch does not apply
Patch failed at 0004 bridge: mrp: Extend br_mrp_switchdev to detect better the errors
hint: Use 'git am --show-current-patch' to see the failed patch
When you have resolved this problem, run "git am --continue".
If you prefer to skip this patch, run "git am --skip" instead.
To restore the original branch and stop patching, run "git am --abort".