linux-kernel - Re: [PATCH v2 3/8] partitions: Introduce NVIDIA Tegra Partition Table

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Date:   Fri, 6 Mar 2020 05:30:39 +0300
From:   Dmitry Osipenko <digetx@...il.com>
To:     Randy Dunlap <rdunlap@...radead.org>, Jens Axboe <axboe@...nel.dk>,
        Thierry Reding <thierry.reding@...il.com>,
        Jonathan Hunter <jonathanh@...dia.com>,
        Michał Mirosław <mirq-linux@...e.qmqm.pl>,
        David Heidelberg <david@...t.cz>,
        Peter Geis <pgwipeout@...il.com>,
        Stephen Warren <swarren@...dotorg.org>,
        Nicolas Chauvet <kwizart@...il.com>,
        Ulf Hansson <ulf.hansson@...aro.org>,
        Adrian Hunter <adrian.hunter@...el.com>,
        Billy Laws <blaws05@...il.com>
Cc:     linux-tegra@...r.kernel.org, linux-block@...r.kernel.org,
        Andrey Danin <danindrey@...l.ru>,
        Gilles Grandou <gilles@...ndou.net>,
        Ryan Grachek <ryan@...ted.us>, linux-mmc@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 3/8] partitions: Introduce NVIDIA Tegra Partition Table

06.03.2020 05:22, Randy Dunlap пишет:
> On 3/5/20 6:12 PM, Dmitry Osipenko wrote:
>> All NVIDIA Tegra devices use a special partition table format for the
>> internal storage partitioning. Most of Tegra devices have GPT partition
>> in addition to TegraPT, but some older Android consumer-grade devices do
>> not or GPT is placed in a wrong sector, and thus, the TegraPT is needed
>> in order to support these devices properly in the upstream kernel. This
>> patch adds support for NVIDIA Tegra Partition Table format that is used
>> at least by all NVIDIA Tegra20 and Tegra30 devices.
>>
>> Signed-off-by: Dmitry Osipenko <digetx@...il.com>
>> ---
>>  arch/arm/mach-tegra/tegra.c   |  54 ++++
>>  block/partitions/Kconfig      |   9 +
>>  block/partitions/Makefile     |   1 +
>>  block/partitions/check.c      |   4 +
>>  block/partitions/tegra.c      | 510 ++++++++++++++++++++++++++++++++++
>>  block/partitions/tegra.h      |  83 ++++++
>>  include/soc/tegra/bootdata.h  |  46 +++
>>  include/soc/tegra/common.h    |   9 +
>>  include/soc/tegra/partition.h |  18 ++
>>  9 files changed, 734 insertions(+)
>>  create mode 100644 block/partitions/tegra.c
>>  create mode 100644 block/partitions/tegra.h
>>  create mode 100644 include/soc/tegra/bootdata.h
>>  create mode 100644 include/soc/tegra/partition.h
> 
> Hi Dmitry,
> 
> 
>> diff --git a/block/partitions/Kconfig b/block/partitions/Kconfig
>> index 702689a628f0..d3c5c6ad6d58 100644
>> --- a/block/partitions/Kconfig
>> +++ b/block/partitions/Kconfig
>> @@ -268,3 +268,12 @@ config CMDLINE_PARTITION
>>  	help
>>  	  Say Y here if you want to read the partition table from bootargs.
>>  	  The format for the command line is just like mtdparts.
>> +
>> +config TEGRA_PARTITION
>> +	bool "NVIDIA Tegra Partition support" if PARTITION_ADVANCED
>> +	default y if ARCH_TEGRA
>> +	depends on ARCH_TEGRA || COMPILE_TEST
>> +	select MMC_BLOCK
> 
> You shouldn't select MMC_BLOCK unless MMC is already enabled,
> so this entire config should depend on MMC also.
> As is, without MMC set/enabled, it should give you a kconfig warning.
> 
> (no, you should not also select MMC here.)
> 
> (This is just based on reading the patch--I haven't tested it
> with CONFIG_MMC not set/enabled.  Have you?)

Hello Randy,

I haven't tested it with the disabled CONFIG_MMC, that's a good
suggestion. I'll take it into account in a v3, thank you.