linux-kernel - Re: [Patch v8 2/4] memory: tegra: Add MC error logging on tegra186 onward

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Message-ID: <777b30fd-59ba-56ec-4f66-4d82118ca921@collabora.com>
Date:   Mon, 25 Apr 2022 22:39:48 +0300
From:   Dmitry Osipenko <dmitry.osipenko@...labora.com>
To:     Ashish Mhetre <amhetre@...dia.com>, krzysztof.kozlowski@...aro.org,
        thierry.reding@...il.com, jonathanh@...dia.com, digetx@...il.com,
        robh+dt@...nel.org, krzysztof.kozlowski+dt@...aro.org,
        linux-kernel@...r.kernel.org, linux-tegra@...r.kernel.org,
        devicetree@...r.kernel.org
Cc:     vdumpa@...dia.com, Snikam@...dia.com
Subject: Re: [Patch v8 2/4] memory: tegra: Add MC error logging on tegra186
 onward

On 4/25/22 10:50, Ashish Mhetre wrote:
> Add support for reading MC_GLOBAL_INTSTATUS register which points to the
> memory controller channels on which interrupts have occurred.
> Add helper function 'mc_global_intstatus_to_channel' which returns the
> channel which should be used to get the information of interrupts.
> Remove static from tegra30_mc_handle_irq and use it as interrupt handler
> for MC interrupts on tegra186, tegra194 and tegra234 to log the errors.
> Add error specific MC status and address register bits and use them on
> tegra186, tegra194 and tegra234.
> Add error logging for generalized carveout interrupt on tegra186, tegra194
> and tegra234.
> Add error logging for route sanity interrupt on tegra194 an tegra234.
> Add register for higher bits of error address which is available on
> tegra194 and tegra234.
> Add a boolean variable 'has_addr_hi_reg' in tegra_mc_soc struture which
> will be true if soc has register for higher bits of memory controller
> error address. Set it true for tegra194 and tegra234.
> Add helper function 'mc_channel_to_global_intstatus' which returns the
> bit of MC_GLOBAL_INSTATUS corresponding to channel of which interrupts
> are logged and use it to clear that interrupt channel.
> Update variable type of client_id_mask from u8 to u16 and add it for
> tegra186, tegra194 and tegra234.

The formatting of the message could be improved. At minimum adding
newlines will help readability. For upstream patches it's very important
to make a good commit message that is readable and concise.

The commit message should contain:

1. A rationale for the change, i.e. you should explain why it is needed.
2. A brief description of what patch does, explaining only difficult
parts in a more details.

> Signed-off-by: Ashish Mhetre <amhetre@...dia.com>
> ---
>  drivers/memory/tegra/mc.c       | 134 ++++++++++++++++++++++++++++----
>  drivers/memory/tegra/mc.h       |  43 +++++++++-
>  drivers/memory/tegra/tegra186.c |   9 +++
>  drivers/memory/tegra/tegra194.c |   8 ++
>  drivers/memory/tegra/tegra234.c |   8 ++
>  include/soc/tegra/mc.h          |   5 +-
>  6 files changed, 189 insertions(+), 18 deletions(-)

Otherwise looks okay:

Reviewed-by: Dmitry Osipenko <dmitry.osipenko@...labora.com>