On Thu, 08 Aug 2013 14:13:57 +0200, Tomasz Figa wrote: > Hi KyongHo, > > Just a little hint for future: > > To make reviewing your patches easier, please send all patches (01 and > further) as a follow up (reply) to cover letter of the series (patch 00). > > This can be achieved by using --thread switch of git send-email for > example. > Thank you for advice. However, git send-email and something like that is prohibitted by the security policy of my company :( I used an email client in windows O/S. I need more consideration to the patches are sent in the order of patches. Thank you. KyongHo. > Best regards, > Tomasz > > On Thursday 08 of August 2013 18:37:10 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 > > 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 receive > > 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: > > v9: > > - Rebased on the following branches > > git.linaro.org/git-ro/people/mturquette/linux.git/clk-next > > > > git.kernel.org/pub/scm/linux/kernel/git/kgene/linux-samsung.git/samsung- > > next git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/master > > (3.11-rc4) - Split "add bus notifier for registering System MMU" into 5 > > patches - Call clk_prepare() that was missing in v8. > > - Fixed base address of sysmmu_tv in exynos4210.dtsi > > - BUG_ON() instead of return -EADDRINUSE when trying mapping on an mapped > > area - Moved camif_top to 317 in drivers/clk/samsung/clk-exynos5250.c - > > Removed 'iommu' property from 'codec'(mfc) node > > - Does not make 'master' clock to be the parent of 'sysmmu' clock. > > 'master' clock is enabled before accessing control registers of System > > MMU and disabled after the access. > > > > v8: > > - Reordered patch list: moved "change rwloc to spinlock" to the last. > > - Fixed remained bug in "fix page table maintenance". > > - Always return 0 from exynos_iommu_attach_device(). > > - Removed prefetch buffer setting when System MMU is enabled > > due to the restriction of prefetch buffers: > > A prefetch buffer must not hit from more than one DMA. > > For instance with GScalers, if a single prefetch buffer is initialized > > with 0x0 ~ 0xFFFFFFFF and a GScaler works on source buffer at > > 0x10000000 and target buffer @ 0x20000000, the System MMU may be got > > deadlock. Clients must initialize prefetch buffers with custom function > > defined in exynos-iommu drivers whenever they need to enable prefetch > > buffers. - The clock of System MMU has no relationship with the clock of > > its master H/W. The clock of master H/W is always enabled when > > exynos-iommu driver needs to access MMIO area and disabled as soon as > > the access finishes. - Removed err_page variable used in > > exynos_iommu_unmap() in the previous patch "fix page table maintenance". > > - Split a big patch "add bus notifier for registering System MMU". > > Extracted the following 2 patches: 9/12 and 10/12. > > - And some additional fixes... > > > > v7: > > - Rebased on the stable 3.10 > > - Registered PM domains and gate clocks with DT > > - Changed connection method between a System MMU and its master H/W > > 'mmu-master' property in the node of System MMU > > --> 'iommu' property in the node of master H/W > > - Marking device descriptor of master H/W of a System MMU with bus > > notifier. - Power management (PM_RUNTIME, PM_SLEEP) of System MMUs with > > gpd_dev_ops of Generic IO Powerdomain. gpd_dev_ops are set to the master > > H/Ws before they are probed in the bus notifier. > > - Removed additional debugging features like debugfs entries and > > version names. > > - Removed support for advanced features of System MMU 3.2 and 3.3 > > the current IOMMU API cannot handle the feature > > (A kind of L2 TLB that fetches several consequence page table entries. > > It must be initialized by the driver of master H/W whenever it works.) > > > > v6: > > - Rebased on the branch, next/iommu-exynos of > > git.kernel.org/pub/scm/linux/kernel/git/kgene/linux-samsung.git > > > > v5: > > - new bugfix: patch 01 > > - Reordered patches > > * patch 01 ~ 05: Bugfix and enhancements of the existing driver > > * patch 06 ~ 10: Device Tree support and callbacks for power management > > * patch 11 : System MMU 3.2 and 3.3 support > > * patch 12 ~ 14: Debugging features > > - Additional code compaction > > > > 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: > > > > Diffstats: > > .../devicetree/bindings/clock/exynos5250-clock.txt | 26 + > > .../bindings/iommu/samsung,exynos4210-sysmmu.txt | 103 ++ > > arch/arm/boot/dts/exynos4.dtsi | 122 +++ > > arch/arm/boot/dts/exynos4210.dtsi | 25 + > > arch/arm/boot/dts/exynos4x12.dtsi | 82 ++ > > arch/arm/boot/dts/exynos5250.dtsi | 290 ++++++ > > drivers/clk/samsung/clk-exynos4.c | 27 +- > > drivers/clk/samsung/clk-exynos5250.c | 57 +- > > drivers/iommu/Kconfig | 5 +- > > drivers/iommu/exynos-iommu.c | 1061 > > +++++++++++++------- 10 files changed, 1423 insertions(+), 375 > > deletions(-) > > > > -- > > To unsubscribe from this list: send the line "unsubscribe > > linux-samsung-soc" in the body of a message to majordomo@xxxxxxxxxxxxxxx > > More majordomo info at http://vger.kernel.org/majordomo-info.html -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
