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2013-02-26tegra: don't wank with d_find_alias()Al Viro1-9/+3
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-02-22new helper: file_inode(file)Al Viro1-3/+1
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-02-19iommu/tegra: assume CONFIG_OF in SMMU driverStephen Warren1-3/+1
Tegra only supports, and always enables, device tree. Remove all ifdefs for DT support from the driver. Signed-off-by: Stephen Warren <swarren@nvidia.com> Signed-off-by: Joerg Roedel <joro@8bytes.org>
2013-02-07iommu/tegra: smmu: Fix incorrect mask for regbaseHiroshi Doyu1-1/+1
This fixes kernel crash because of BUG() in register address validation. Signed-off-by: Hiroshi Doyu <hdoyu@nvidia.com> Signed-off-by: Joerg Roedel <joro@8bytes.org>
2013-02-05iommu/tegra: smmu: Use helper function to check for valid register offsetJoerg Roedel1-17/+18
Do not repeat the checking loop in the read and write functions. Use a single helper function for that check and call it in both accessors. Signed-off-by: Joerg Roedel <joro@8bytes.org>
2013-02-05iommu/tegra: smmu: Support variable MMIO ranges/blocksHiroshi Doyu1-25/+36
Presently SMMU registers are located in discontiguous 3 blocks. They are interleaved by MC registers. Ideally SMMU register blocks should be in an independent one block, but it is too late to change this H/W design. In the future Tegra chips over some generations, it is expected that some of register block "size" can be extended towards the end and also more new register blocks will be added at most a few blocks. The starting address of each existing block won't change. This patch allocates multiple number of register blocks dynamically based on the info passed from DT. Those ranges are verified in the accessors{read,write}. This may sacrifice some performance because a new accessors prevents compiler optimization of a fixed size register offset calculation. Since SMMU register accesses are not so frequent, this would be acceptable. This patch is necessary to unify "tegra-smmu.ko" over some Tegra SoC generations. Signed-off-by: Hiroshi Doyu <hdoyu@nvidia.com> Reviewed-by: Stephen Warren <swarren@nvidia.com> Signed-off-by: Joerg Roedel <joro@8bytes.org>
2013-02-04iommu/tegra: Add missing spinlock initializationSami Liedes1-1/+2
Fix tegra_smmu_probe() to initialize client_lock spinlocks in per-address-space structures. Signed-off-by: Sami Liedes <sliedes@nvidia.com> Signed-off-by: Joerg Roedel <joro@8bytes.org>
2013-01-25iommu: Convert to devm_ioremap_resource()Thierry Reding1-3/+4
Convert all uses of devm_request_and_ioremap() to the newly introduced devm_ioremap_resource() which provides more consistent error handling. devm_ioremap_resource() provides its own error messages so all explicit error messages can be removed from the failure code paths. Signed-off-by: Thierry Reding <thierry.reding@avionic-design.de> Cc: Joerg Roedel <joro@8bytes.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-01-03Drivers: iommu: remove __dev* attributes.Greg Kroah-Hartman1-2/+2
CONFIG_HOTPLUG is going away as an option. As a result, the __dev* markings need to be removed. This change removes the use of __devinit, __devexit_p, __devinitdata, and __devexit from these drivers. Based on patches originally written by Bill Pemberton, but redone by me in order to handle some of the coding style issues better, by hand. Cc: Bill Pemberton <wfp5p@virginia.edu> Cc: David Woodhouse <dwmw2@infradead.org> Cc: Joerg Roedel <joro@8bytes.org> Cc: Ohad Ben-Cohen <ohad@wizery.com> Cc: Tony Lindgren <tony@atomide.com> Cc: Omar Ramirez Luna <omar.luna@linaro.org> Cc: Mauro Carvalho Chehab <mchehab@redhat.com> Cc: Hiroshi Doyu <hdoyu@nvidia.com> Cc: Stephen Warren <swarren@wwwdotorg.org> Cc: Bharat Nihalani <bnihalani@nvidia.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2012-12-20Merge tag 'iommu-updates-v3.8' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommuLinus Torvalds1-4/+2
Pull IOMMU updates from Joerg Roedel: "A few new features this merge-window. The most important one is probably, that dma-debug now warns if a dma-handle is not checked with dma_mapping_error by the device driver. This requires minor changes to some architectures which make use of dma-debug. Most of these changes have the respective Acks by the Arch-Maintainers. Besides that there are updates to the AMD IOMMU driver for refactor the IOMMU-Groups support and to make sure it does not trigger a hardware erratum. The OMAP changes (for which I pulled in a branch from Tony Lindgren's tree) have a conflict in linux-next with the arm-soc tree. The conflict is in the file arch/arm/mach-omap2/clock44xx_data.c which is deleted in the arm-soc tree. It is safe to delete the file too so solve the conflict. Similar changes are done in the arm-soc tree in the common clock framework migration. A missing hunk from the patch in the IOMMU tree will be submitted as a seperate patch when the merge-window is closed." * tag 'iommu-updates-v3.8' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu: (29 commits) ARM: dma-mapping: support debug_dma_mapping_error ARM: OMAP4: hwmod data: ipu and dsp to use parent clocks instead of leaf clocks iommu/omap: Adapt to runtime pm iommu/omap: Migrate to hwmod framework iommu/omap: Keep mmu enabled when requested iommu/omap: Remove redundant clock handling on ISR iommu/amd: Remove obsolete comment iommu/amd: Don't use 512GB pages iommu/tegra: smmu: Move bus_set_iommu after probe for multi arch iommu/tegra: gart: Move bus_set_iommu after probe for multi arch iommu/tegra: smmu: Remove unnecessary PTC/TLB flush all tile: dma_debug: add debug_dma_mapping_error support sh: dma_debug: add debug_dma_mapping_error support powerpc: dma_debug: add debug_dma_mapping_error support mips: dma_debug: add debug_dma_mapping_error support microblaze: dma-mapping: support debug_dma_mapping_error ia64: dma_debug: add debug_dma_mapping_error support c6x: dma_debug: add debug_dma_mapping_error support ARM64: dma_debug: add debug_dma_mapping_error support intel-iommu: Prevent devices with RMRRs from being placed into SI Domain ...
2012-11-28iommu/tegra: smmu: Move bus_set_iommu after probe for multi archHiroshi Doyu1-1/+1
For a single image to support multiple SoCs(GART/SMMU). Reported-by: Arto Merilainen <amerilainen@nvidia.com> Signed-off-by: Hiroshi Doyu <hdoyu@nvidia.com> Signed-off-by: Joerg Roedel <joro@8bytes.org>
2012-11-28iommu/tegra: smmu: Remove unnecessary PTC/TLB flush allHiroshi Doyu1-3/+1
smmu_flush_regs() does TLB/PTC flush all when freeing a second level page table. This isn't necessay at all since each pte entry has been already maintained by address in the above flush_ptc_and_tlb(). Signed-off-by: Hiroshi Doyu <hdoyu@nvidia.com> Signed-off-by: Joerg Roedel <joro@8bytes.org>
2012-11-25Merge tag 'v3.7-rc7' into next/cleanupOlof Johansson1-0/+1
Merging in mainline back to next/cleanup since it has collected a few conflicts between fixes going upstream and some of the cleanup patches. Git doesn't auto-resolve some of them, and they're mostly noise so let's take care of it locally. Conflicts are in: arch/arm/mach-omap2/omap_hwmod_44xx_data.c arch/arm/plat-omap/i2c.c drivers/video/omap2/dss/dss.c Signed-off-by: Olof Johansson <olof@lixom.net>
2012-11-17iommu/tegra-smmu.c: fix dentry reference leak in smmu_debugfs_stats_show().Cyril Roelandt1-0/+1
Call to d_find_alias() needs a corresponding dput(). Signed-off-by: Cyril Roelandt <tipecaml@gmail.com> Signed-off-by: Joerg Roedel <joro@8bytes.org>
2012-11-05ARM: tegra: move tegra-ahb.h out of arch/arm/mach-tegra/Stephen Warren1-2/+1
We wish to empty arch/arm/mach-tegra/include/mach/ as much as possible to enable single zImage. Move tegra-ahb.h to a more central location (suggested by Arnd, OK'd by Greg KH), and actually make tegra-ahb.c include the header to ensure client and provider agree on the prototype. Signed-off-by: Stephen Warren <swarren@nvidia.com>
2012-11-05iommu: tegra: remove include of <mach/iomap.h>Stephen Warren1-1/+0
Nothing from this file is used, and the file will hopefully be deleted soon. Signed-off-by: Stephen Warren <swarren@nvidia.com> Acked-by: Joerg Roedel <joerg.roedel@amd.com>
2012-10-24iommu/tegra: smmu: Fix deadly typoHiro Sugawara1-1/+1
Fix a deadly typo in macro definition. Cc: stable@vger.kernel.org Signed-off-by: Hiro Sugawara <hsugawara@nvidia.com> Signed-off-by: Hiroshi Doyu <hdoyu@nvidia.com> Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2012-10-02Merge branches 'dma-debug', 'iommu/fixes', 'arm/tegra', 'arm/exynos', 'x86/amd', 'x86/vt-d' and 'x86/amd-irq-remapping' into nextJoerg Roedel1-13/+248
Conflicts: drivers/iommu/amd_iommu_init.c
2012-09-18dma: tegra: move smmu.h into SMMU driverStephen Warren1-1/+40
There's no need to place these defines into arch/arm/mach-tegra/include/. Move them into the SMMU driver to clean up mach-tegra, as a pre-requisite for single-zImage. Signed-off-by: Stephen Warren <swarren@nvidia.com> Cc: Hiroshi Doyu <hdoyu@nvidia.com> Acked-by: Hiroshi Doyu <hdoyu@nvidia.com> Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2012-09-18iommu/tegra: smmu: Use debugfs_create_dir for directoryHiroshi Doyu1-17/+35
The commit c3b1a35 "debugfs: make sure that debugfs_create_file() gets used only for regulars" doesn't allow to use debugfs_create_file() for dir. Keep debugfs data in smmu_device instead of directory's i_private. Signed-off-by: Hiroshi Doyu <hdoyu@nvidia.com> Signed-off-by: Stephen Warren <swarren@nvidia.com> Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2012-08-03iommu/tegra: smmu: debugfs for TLB/PTC statisticsHiroshi Doyu1-12/+190
Add debugfs entries to collect TLB/PTC statistics. $ echo "reset" > /sys/kernel/debug/smmu/mc/{tlb,ptc} $ echo "on" > /sys/kernel/debug/smmu/mc/{tlb,ptc} $ echo "off" > /sys/kernel/debug/smmu/mc/{tlb,ptc} $ cat /sys/kernel/debug/smmu/mc/{tlb,ptc} hit:0014910c miss:00014d22 The above format is: hit:<HIT count><SPC>miss:<MISS count><SPC><CR+LF> fscanf(fp, "hit:%lx miss:%lx", &hit, &miss); Signed-off-by: Hiroshi Doyu <hdoyu@nvidia.com> Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2012-08-03iommu/tegra: smmu: Fix error initial value at domain_initHiroshi Doyu1-1/+1
err initial value should be -EAGAIN. Otherwise 2nd iteration always fails in the case as[0] is occupied. Signed-off-by: Hiroshi Doyu <hdoyu@nvidia.com> Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2012-08-03iommu/tegra: smmu: Cleanup with lesser nestHiroshi Doyu1-5/+8
Small clean up with lesser nest for readability. Signed-off-by: Hiroshi Doyu <hdoyu@nvidia.com> Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2012-08-03iommu/tegra: remove invalid reference to list iterator variableJulia Lawall1-1/+1
If list_for_each_entry, etc complete a traversal of the list, the iterator variable ends up pointing to an address at an offset from the list head, and not a meaningful structure. Thus this value should not be used after the end of the iterator. Replace c->dev by dev, which is the value that c->dev has been compared to. This problem was found using Coccinelle (http://coccinelle.lip6.fr/). Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr> Acked-by: Stephen Warren <swarren@wwwdotorg.org> Acked-by: Hiroshi DOYU <hdoyu@nvidia.com> Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2012-07-23Merge branches 'iommu/fixes', 'x86/amd', 'groups', 'arm/tegra' and 'api/domain-attr' into nextJoerg Roedel1-131/+154
Conflicts: drivers/iommu/iommu.c include/linux/iommu.h
2012-07-17iommu/tegra: Don't call alloc_pdir with as->lockJoerg Roedel1-13/+16
Instead of taking as->lock before calling alloc_pdir() and releasing it in that function to allocate memory, just take the lock only in the alloc_pdir function and run the loop without any lock held. This simplifies the complicated lock->unlock->alloc->lock->unlock sequence into alloc->lock->unlock. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2012-07-17iommu/tegra: smmu: Fix unsleepable memory allocation at alloc_pdir()Hiroshi DOYU1-32/+45
alloc_pdir() is called from smmu_iommu_domain_init() with spin_lock held. memory allocations in alloc_pdir() had to be atomic. Instead of converting into atomic allocation, this patch once releases a lock, does the allocation, holds the lock again and then sees if it's raced or not in order to avoid introducing mutex and preallocation. Signed-off-by: Hiroshi DOYU <hdoyu@nvidia.com> Reported-by: Chris Wright <chrisw@sous-sol.org> Cc: Chris Wright <chrisw@sous-sol.org> Acked-by: Stephen Warren <swarren@wwwdotorg.org> Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2012-07-17iommu/tegra: smmu: Remove unnecessary sanity check at alloc_pdir()Hiroshi DOYU1-3/+0
alloc_pdir() is called with smmu->as[?].pdir_page == NULL. No need to check pdir_page again inside alloc_pdir(). Signed-off-by: Hiroshi DOYU <hdoyu@nvidia.com> Acked-by: Stephen Warren <swarren@wwwdotorg.org> Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2012-07-11iommu/tegra: Implement DOMAIN_ATTR_GEOMETRY attributeHiroshi DOYU1-0/+5
Implement the attribute for the Tegra IOMMU drivers. Signed-off-by: Hiroshi DOYU <hdoyu@nvidia.com> Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2012-07-02iommu/tegra: smmu: Fix unsleepable memory allocationHiroshi DOYU1-2/+2
allo_pdir() is called in smmu_iommu_domain_init() with spin_lock held. memory allocations in it have to be atomic/unsleepable. Signed-off-by: Hiroshi DOYU <hdoyu@nvidia.com> Reported-by: Chris Wright <chrisw@sous-sol.org> Acked-by: Chris Wright <chrisw@sous-sol.org> Cc: stable@vger.kernel.org Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2012-06-25iommu/tegra: smmu: Fix uninitialized var warningHiroshi Doyu1-2/+2
For the compiler warning, uninitizlized var when getting value by a pointer. Signed-off-by: Hiroshi DOYU <hdoyu@nvidia.com> Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2012-06-25iommu/tegra: smmu: Remove unnecessary cleanups with devm_*()Hiroshi Doyu1-31/+6
Remove unnecessary cleanup procedures with devm_*() functions. Signed-off-by: Hiroshi DOYU <hdoyu@nvidia.com> Acked-by: Stephen Warren <swarren@wwwdotorg.org> Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2012-06-25iommu/tegra: smmu: Simplify allocation at onceHiroshi Doyu1-20/+9
To simplify the code, alloc necessary data at once. Signed-off-by: Hiroshi DOYU <hdoyu@nvidia.com> Acked-by: Stephen Warren <swarren@wwwdotorg.org> Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2012-06-25iommu/tegra: smmu: Add device tree support for SMMUHiroshi Doyu1-54/+95
The necessary info is expected to pass from DT. For more precise resource reservation, there shouldn't be any overlapping of register range between SMMU and MC. SMMU register offset needs to be calculated correctly, based on its register bank. Signed-off-by: Hiroshi DOYU <hdoyu@nvidia.com> Acked-by: Stephen Warren <swarren@wwwdotorg.org> Acked-by: Grant Likely <grant.likely@secretlab.ca> Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2012-04-16iommu/tegra: smmu: Print device name correctlyHiroshi DOYU1-1/+1
Print an attached device name correctly. Signed-off-by: Hiroshi DOYU <hdoyu@nvidia.com> Reviewed-by: Thierry Reding <thierry.reding@avionic-design.de> Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2012-01-26ARM: IOMMU: Tegra30: Add iommu_ops for SMMU driverHiroshi DOYU1-0/+1034
Tegra 30 IOMMU H/W, SMMU (System Memory Management Unit). This patch implements struct iommu_ops for SMMU for the upper IOMMU API. This H/W module supports multiple virtual address spaces(domain x4), and manages 2 level H/W translation pagetable. Signed-off-by: Hiroshi DOYU <hdoyu@nvidia.com> Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
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