linux-kernel - Re: [PATCH 1/3] ARM: mmp: add sram allocator

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Date:	Mon, 15 Aug 2011 17:30:16 +0800
From:	Haojian Zhuang <haojian.zhuang@...il.com>
To:	Jean-Christophe PLAGNIOL-VILLARD <plagnioj@...osoft.com>
Cc:	Arnd Bergmann <arnd@...db.de>,
	Nicolas Pitre <nicolas.pitre@...aro.org>,
	Russell King <linux@....linux.org.uk>,
	Leo Yan <leoy@...vell.com>, linux-kernel@...r.kernel.org,
	Haojian Zhuang <hzhuang1@...vell.com>,
	linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH 1/3] ARM: mmp: add sram allocator

On Mon, Aug 15, 2011 at 5:09 PM, Jean-Christophe PLAGNIOL-VILLARD
<plagnioj@...osoft.com> wrote:
> On 10:59 Mon 15 Aug     , Arnd Bergmann wrote:
>> On Monday 15 August 2011 11:09:52 Leo Yan wrote:
>> > On mmp platform, there have two sram banks:
>> > audio sram and internal sram. The audio sram is mainly for audio;
>> > the internal sram is for video, wtm and power management.
>> > So add the sram allocator using genalloc to manage them.
>> >
>> > Every sram bank will register its own platform device
>> > info, after the sram allocator create the generic pool
>> > for the sram bank, the user module can use the pool's
>> > name to get the pool handler; then it can use the handler
>> > to alloc/free memory with genalloc APIs.
>> >
>> > Signed-off-by: Leo Yan <leoy@...vell.com>
>> > ---
>> >  arch/arm/Kconfig                      |    1 +
>> >  arch/arm/mach-mmp/Makefile            |    2 +-
>> >  arch/arm/mach-mmp/include/mach/sram.h |   35 +++++++
>> >  arch/arm/mach-mmp/sram.c              |  168 +++++++++++++++++++++++++++++++++
>> >  4 files changed, 205 insertions(+), 1 deletions(-)
>> >  create mode 100644 arch/arm/mach-mmp/include/mach/sram.h
>> >  create mode 100644 arch/arm/mach-mmp/sram.c
>>
>> Some time ago, there was talk of merging the existing sram drivers
>> and creating a common driver that is easy to hook into.
>>
>> What has happened with that? My feeling is that we should stop adding
>> more drivers like this in the platform code but rather put an
>> authoritative copy into arch/arm/mm/ or even the top-level mm/ directory
>> and change over the existing drivers to hook into that one.
> no need anymore I send patch to add the support of phys/virt to genalloc so
> now we just have to use it
>
> Best Regards,
> J.
>
Exactly, and Russel already gave up on original patch. genpool is already a
common driver.

Thanks
Haojian
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