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

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Message-ID: <14750f67-2f5e-3139-b1c4-a80bb4b892b8@nvidia.com>
Date:   Tue, 26 Apr 2022 13:05:05 +0530
From:   Ashish Mhetre <amhetre@...dia.com>
To:     Dmitry Osipenko <dmitry.osipenko@...labora.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 4/26/2022 1:09 AM, Dmitry Osipenko wrote:
> External email: Use caution opening links or attachments
> 
> 
> 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.
> 
Okay, I will update commit message considering above comments.
I'll keep it to the point and remove unnecessary implementation 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>

Thanks Dmitry.