From: Arnd Bergmann <arnd@arndb.de>
To: linux-arm-kernel@lists.infradead.org
Cc: Marek Szyprowski <m.szyprowski@samsung.com>,
linux-samsung-soc@vger.kernel.org, linux-media@vger.kernel.org,
t.stanislaws@samsung.com, k.debski@samsung.com,
kgene.kim@samsung.com, kyungmin.park@samsung.com,
s.nawrocki@samsung.com, andrzej.p@samsung.com
Subject: Re: [PATCH 3/7] ARM: Samsung: update/rewrite Samsung SYSMMU (IOMMU) driver
Date: Thu, 10 Mar 2011 15:52:15 +0100 [thread overview]
Message-ID: <201103101552.15536.arnd@arndb.de> (raw)
In-Reply-To: <1299254660-15765-1-git-send-email-m.szyprowski@samsung.com>
On Friday 04 March 2011, Marek Szyprowski wrote:
> From: Andrzej Pietrasiewicz <andrzej.p@samsung.com>
>
> This patch performs a complete rewrite of sysmmu driver for Samsung platform:
> - the new version introduces an api to construct device private page
> tables and enables to use device private address space mode
> - simplified the resource management: no more single platform
> device with 32 resources is needed, better fits into linux driver model,
> each sysmmu instance has it's own resource definition
> - added support for sysmmu clocks
> - some other minor API chages required by upcoming videobuf2 allocator
>
> Signed-off-by: Andrzej Pietrasiewicz <andrzej.p@samsung.com>
> Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
> Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Please explain why create a new IOMMU API when we already have two
generic ones (include/linux/iommu.h and include/linux/dma-mapping.h).
Is there something that cannot be done with the common code?
The first approach should be to extend the existing APIs to
do what you need.
Arnd
WARNING: multiple messages have this Message-ID (diff)
From: arnd@arndb.de (Arnd Bergmann)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH 3/7] ARM: Samsung: update/rewrite Samsung SYSMMU (IOMMU) driver
Date: Thu, 10 Mar 2011 15:52:15 +0100 [thread overview]
Message-ID: <201103101552.15536.arnd@arndb.de> (raw)
In-Reply-To: <1299254660-15765-1-git-send-email-m.szyprowski@samsung.com>
On Friday 04 March 2011, Marek Szyprowski wrote:
> From: Andrzej Pietrasiewicz <andrzej.p@samsung.com>
>
> This patch performs a complete rewrite of sysmmu driver for Samsung platform:
> - the new version introduces an api to construct device private page
> tables and enables to use device private address space mode
> - simplified the resource management: no more single platform
> device with 32 resources is needed, better fits into linux driver model,
> each sysmmu instance has it's own resource definition
> - added support for sysmmu clocks
> - some other minor API chages required by upcoming videobuf2 allocator
>
> Signed-off-by: Andrzej Pietrasiewicz <andrzej.p@samsung.com>
> Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
> Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Please explain why create a new IOMMU API when we already have two
generic ones (include/linux/iommu.h and include/linux/dma-mapping.h).
Is there something that cannot be done with the common code?
The first approach should be to extend the existing APIs to
do what you need.
Arnd
next prev parent reply other threads:[~2011-03-10 14:52 UTC|newest]
Thread overview: 59+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-03-04 9:01 [PATCH/RFC 0/7] Samsung IOMMU videobuf2 allocator and s5p-fimc update Marek Szyprowski
2011-03-04 9:01 ` Marek Szyprowski
2011-03-04 9:01 ` [PATCH 1/7] ARM: S5PV310: Add platform definitions for FIMC Marek Szyprowski
2011-03-04 9:01 ` Marek Szyprowski
2011-03-12 0:27 ` Kukjin Kim
2011-03-12 0:27 ` Kukjin Kim
2011-03-04 9:01 ` [PATCH 2/7] ARM: S5PV310: power domains: fixes and code cleanup Marek Szyprowski
2011-03-04 9:01 ` Marek Szyprowski
2011-03-04 9:01 ` [PATCH 3/7] ARM: Samsung: update/rewrite Samsung SYSMMU (IOMMU) driver Marek Szyprowski
2011-03-04 9:01 ` Marek Szyprowski
2011-03-04 16:04 ` Marek Szyprowski
2011-03-04 16:04 ` Marek Szyprowski
2011-03-10 14:52 ` Arnd Bergmann [this message]
2011-03-10 14:52 ` Arnd Bergmann
2011-03-11 9:04 ` Marek Szyprowski
2011-03-11 9:04 ` Marek Szyprowski
2011-03-11 11:50 ` Arnd Bergmann
2011-03-11 11:50 ` Arnd Bergmann
2011-03-11 12:35 ` Marek Szyprowski
2011-03-11 12:35 ` Marek Szyprowski
2011-03-11 14:07 ` Arnd Bergmann
2011-03-11 14:07 ` Arnd Bergmann
2011-03-11 14:51 ` Marek Szyprowski
2011-03-11 14:51 ` Marek Szyprowski
2011-03-11 15:15 ` Arnd Bergmann
2011-03-11 15:15 ` Arnd Bergmann
2011-03-11 15:39 ` Marek Szyprowski
2011-03-11 15:39 ` Marek Szyprowski
2011-03-11 16:00 ` Arnd Bergmann
2011-03-11 16:00 ` Arnd Bergmann
2011-03-14 12:37 ` KyongHo Cho
2011-03-14 12:37 ` KyongHo Cho
2011-03-14 12:46 ` Russell King - ARM Linux
2011-03-14 12:46 ` Russell King - ARM Linux
2011-03-15 1:45 ` InKi Dae
2011-03-15 1:45 ` InKi Dae
2011-03-15 8:35 ` Russell King - ARM Linux
2011-03-15 8:35 ` Russell King - ARM Linux
2011-03-15 9:34 ` daeinki
2011-03-15 9:34 ` daeinki
2011-03-15 9:53 ` Russell King - ARM Linux
2011-03-15 9:53 ` Russell King - ARM Linux
2011-03-15 9:53 ` Russell King - ARM Linux
2011-03-14 13:32 ` Arnd Bergmann
2011-03-14 13:32 ` Arnd Bergmann
2011-03-04 9:01 ` [PATCH 4/7] v4l: videobuf2: add Samsung SYSMMU (IOMMU) based allocator Marek Szyprowski
2011-03-04 9:01 ` Marek Szyprowski
2011-03-04 9:01 ` [PATCH 5/7] s5p-fimc: add pm_runtime support Marek Szyprowski
2011-03-04 9:01 ` Marek Szyprowski
2011-03-04 9:01 ` [PATCH 6/7] s5p-fimc: Add support for vb2-s5p-iommu allocator Marek Szyprowski
2011-03-04 9:01 ` Marek Szyprowski
2011-03-04 9:01 ` [PATCH 7/7] ARM: S5PC210: enable FIMC on Universal_C210 Marek Szyprowski
2011-03-04 9:01 ` Marek Szyprowski
2011-03-08 7:28 ` [PATCH/RFC 0/7] Samsung IOMMU videobuf2 allocator and s5p-fimc update Kukjin Kim
2011-03-08 7:28 ` Kukjin Kim
2011-03-08 9:34 ` Marek Szyprowski
2011-03-08 9:34 ` Marek Szyprowski
2011-03-08 10:05 ` InKi Dae
2011-03-08 10:05 ` InKi Dae
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