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Message-id: <008601cdce20$1ccffb00$566ff100$%cho@samsung.com> Date: Thu, 29 Nov 2012 19:55:57 +0900 From: Cho KyongHo <pullip.cho@...sung.com> To: 'Cho KyongHo' <pullip.cho@...sung.com>, 'Kukjin Kim' <kgene.kim@...sung.com>, linux-arm-kernel@...ts.infradead.org, linux-samsung-soc@...r.kernel.org, iommu@...ts.linux-foundation.org, linux-kernel@...r.kernel.org Cc: 'Joerg Roedel' <joro@...tes.org>, 'Sanghyun Lee' <sanghyun75.lee@...sung.com>, sw0312.kim@...sung.com, 'Subash Patel' <subash.ramaswamy@...aro.org>, prathyush.k@...sung.com, rahul.sharma@...sung.com Subject: RE: [PATCH v4 00/12] iommu/exynos: Fixes and Enhancements of System MMU driver with DT > -----Original Message----- > From: Cho KyongHo [mailto:pullip.cho@...sung.com] > Sent: Monday, November 26, 2012 10:54 AM > > -----Original Message----- > > From: Cho KyongHo [mailto:pullip.cho@...sung.com] > > Sent: Monday, November 26, 2012 10:28 AM > > > > > -----Original Message----- > > > From: Kukjin Kim [mailto:kgene.kim@...sung.com] > > > Sent: Friday, November 23, 2012 5:08 PM > > > Subject: RE: [PATCH v4 00/12] iommu/exynos: Fixes and Enhancements of System MMU driver with DT > > > > > > Cho KyongHo wrote: > > > > > > > > The current exynos-iommu(System MMU) driver does not work autonomously > > > > since it is lack of support for power management of peripheral blocks. > > > > For example, MFC device driver must ensure that its System MMU is disabled > > > > before MFC block is power-down not to invalidate IOTLB in the System MMU > > > > when I/O memory mapping is changed. Because A System MMU is resides in the > > > > same H/W block, access to control registers of System MMU while the H/W > > > > block is turned off must be prohibited. > > > > > > > > This set of changes solves the above problem with setting each System MMUs > > > > as the parent of the device which owns the System MMU to recieve the > > > > information when the device is turned off or turned on. > > > > > > > > Another big change to the driver is the support for devicetree. > > > > The bindings for System MMU is described in > > > > Documentation/devicetree/bindings/arm/samsung/system-mmu.txt > > > > > > > > In addition, this patchset also includes several bug fixes and > > > > enhancements > > > > of the current driver. > > > > > > > > Change log: > > > > v4: > > > > - Remove Change-Id from v3 patches > > > > - Change the order of the third and the first patch > > > > Thanks to Kukjin Kim. > > > > - Fix memory leak when allocating and assigning exynos_iommu_owner to > > > > client > > > > device if the client device has multiple System MMUs. > > > > Thanks to Rahul Sharma. > > > > > > > > v3: > > > > - Fix prefetch buffer flag definition for System MMU 3.3 (patch 10/12) > > > > - Fix incorrect setting for SET_RUNTIME_PM_OPS (patch 09/12) > > > > Thanks to Prathyush. > > > > > > > > v2: > > > > - Split the patch to iommu/exynos into 9 patches > > > > - Support for System MMU 3.3 > > > > - Some code compaction > > > > > > > > Patch summary: > > > > [PATCH v4 01/12] ARM: EXYNOS: Add clk_ops for gating clocks of System MMU > > > > [PATCH v4 02/12] ARM: EXYNOS: add System MMU definition to DT > > > > [PATCH v4 03/12] ARM: EXYNOS: remove system mmu initialization from exynos > > > > tree > > > > [PATCH v4 04/12] iommu/exynos: support for device tree > > > > [PATCH v4 05/12] iommu/exynos: pass version information from DT > > > > [PATCH v4 06/12] iommu/exynos: allocate lv2 page table from own slab > > > > [PATCH v4 07/12] iommu/exynos: change rwlock to spinlock > > > > [PATCH v4 08/12] iommu/exynos: set System MMU as the parent of client > > > > device > > > > [PATCH v4 09/12] iommu/exynos: add support for runtime pm and > > > > suspend/resume > > > > [PATCH v4 10/12] iommu/exynos: add support for System MMU 3.2 and 3.3 > > > > [PATCH v4 11/12] iommu/exynos: add literal name of System MMU for > > > > debugging > > > > [PATCH v4 12/12] iommu/exynos: add debugfs entries for System MMU > > > > > > > > Diffstats: > > > > .../devicetree/bindings/arm/exynos/system-mmu.txt | 86 ++ > > > > arch/arm/boot/dts/exynos4210.dtsi | 96 ++ > > > > arch/arm/boot/dts/exynos4x12.dtsi | 124 ++ > > > > arch/arm/boot/dts/exynos5250.dtsi | 147 +- > > > > arch/arm/mach-exynos/Kconfig | 5 - > > > > arch/arm/mach-exynos/Makefile | 1 - > > > > arch/arm/mach-exynos/clock-exynos4.c | 41 +- > > > > arch/arm/mach-exynos/clock-exynos4210.c | 9 +- > > > > arch/arm/mach-exynos/clock-exynos4212.c | 23 +- > > > > arch/arm/mach-exynos/clock-exynos5.c | 86 +- > > > > arch/arm/mach-exynos/dev-sysmmu.c | 274 ---- > > > > arch/arm/mach-exynos/include/mach/sysmmu.h | 66 - > > > > arch/arm/mach-exynos/mach-exynos4-dt.c | 34 + > > > > arch/arm/mach-exynos/mach-exynos5-dt.c | 30 + > > > > drivers/iommu/Kconfig | 2 +- > > > > drivers/iommu/exynos-iommu.c | 1428 > > > +++++++++++++++----- > > > > 16 files changed, 1720 insertions(+), 732 deletions(-) > > > > > > Looks good to me 1st~3rd patches. After quick review, I think, 1st and 2nd > > > patches can go to upstream for v3.8 without any dependency. So I will. > > > > > > The 3rd patch has a dependency with other driver changes (4th ~ 12th), so it > > > should be sent to upstream with others. > > > > > > BTW since the 3rd patch touches many Samsung stuff in arch/arm/ so I'd > > > prefer to take it in Samsung tree. If Joerg is ok on iommu/exynos driver > > > changes for v3.8... > > > > > > Joerg, please let me know about iommu/exynos stuff so that I can decide to > > > take 3rd patch or not for v3.8. > > > > > > > Hi, Kukjin Kim. > > > > I found that control bit fields of clock gating of System MMU of MFC L/R is inversed. > > That is reported by Prathyush Kalashwaram. > > > > I will post v5 patchset that solves this. > > > > I did not posted v5 patchset. > Instead, I posted just the fix for the 03/12 patch mentioned above > as the reply to the 03/12 patch. > Hi, Joerg. I am waiting for your comment about the patchset. The latest version is v4. And a fix of [patch v4 03/12] mentioned above is posted as a reply. If you have any concern about the patches, please let me know Thank you. Cho KyongHo. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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