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path: root/drivers/iommu/omap-iommu.c
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2018-08-08Merge branches 'arm/shmobile', 'arm/renesas', 'arm/msm', 'arm/smmu', ↵Joerg Roedel1-3/+2
'arm/omap', 'x86/amd', 'x86/vt-d' and 'core' into next
2018-08-08iommu/omap: Fix cache flushes on L2 table entriesRalf Goebel1-2/+2
The base address used for DMA operations on the second-level table did incorrectly include the offset for the table entry. The offset was then added again which lead to incorrect behavior. Operations on the L1 table are not affected. The calculation of the base address is changed to point to the beginning of the L2 table. Fixes: bfee0cf0ee1d ("iommu/omap: Use DMA-API for performing cache flushes") Acked-by: Suman Anna <s-anna@ti.com> Signed-off-by: Ralf Goebel <ralf.goebel@imago-technologies.com> Signed-off-by: Joerg Roedel <jroedel@suse.de>
2018-08-08iommu: Remove the ->map_sg indirectionChristoph Hellwig1-1/+0
All iommu drivers use the default_iommu_map_sg implementation, and there is no good reason to ever override it. Just expose it as iommu_map_sg directly and remove the indirection, specially in our post-spectre world where indirect calls are horribly expensive. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Joerg Roedel <jroedel@suse.de>
2018-06-13treewide: kzalloc() -> kcalloc()Kees Cook1-1/+1
The kzalloc() function has a 2-factor argument form, kcalloc(). This patch replaces cases of: kzalloc(a * b, gfp) with: kcalloc(a * b, gfp) as well as handling cases of: kzalloc(a * b * c, gfp) with: kzalloc(array3_size(a, b, c), gfp) as it's slightly less ugly than: kzalloc_array(array_size(a, b), c, gfp) This does, however, attempt to ignore constant size factors like: kzalloc(4 * 1024, gfp) though any constants defined via macros get caught up in the conversion. Any factors with a sizeof() of "unsigned char", "char", and "u8" were dropped, since they're redundant. The Coccinelle script used for this was: // Fix redundant parens around sizeof(). @@ type TYPE; expression THING, E; @@ ( kzalloc( - (sizeof(TYPE)) * E + sizeof(TYPE) * E , ...) | kzalloc( - (sizeof(THING)) * E + sizeof(THING) * E , ...) ) // Drop single-byte sizes and redundant parens. @@ expression COUNT; typedef u8; typedef __u8; @@ ( kzalloc( - sizeof(u8) * (COUNT) + COUNT , ...) | kzalloc( - sizeof(__u8) * (COUNT) + COUNT , ...) | kzalloc( - sizeof(char) * (COUNT) + COUNT , ...) | kzalloc( - sizeof(unsigned char) * (COUNT) + COUNT , ...) | kzalloc( - sizeof(u8) * COUNT + COUNT , ...) | kzalloc( - sizeof(__u8) * COUNT + COUNT , ...) | kzalloc( - sizeof(char) * COUNT + COUNT , ...) | kzalloc( - sizeof(unsigned char) * COUNT + COUNT , ...) ) // 2-factor product with sizeof(type/expression) and identifier or constant. @@ type TYPE; expression THING; identifier COUNT_ID; constant COUNT_CONST; @@ ( - kzalloc + kcalloc ( - sizeof(TYPE) * (COUNT_ID) + COUNT_ID, sizeof(TYPE) , ...) | - kzalloc + kcalloc ( - sizeof(TYPE) * COUNT_ID + COUNT_ID, sizeof(TYPE) , ...) | - kzalloc + kcalloc ( - sizeof(TYPE) * (COUNT_CONST) + COUNT_CONST, sizeof(TYPE) , ...) | - kzalloc + kcalloc ( - sizeof(TYPE) * COUNT_CONST + COUNT_CONST, sizeof(TYPE) , ...) | - kzalloc + kcalloc ( - sizeof(THING) * (COUNT_ID) + COUNT_ID, sizeof(THING) , ...) | - kzalloc + kcalloc ( - sizeof(THING) * COUNT_ID + COUNT_ID, sizeof(THING) , ...) | - kzalloc + kcalloc ( - sizeof(THING) * (COUNT_CONST) + COUNT_CONST, sizeof(THING) , ...) | - kzalloc + kcalloc ( - sizeof(THING) * COUNT_CONST + COUNT_CONST, sizeof(THING) , ...) ) // 2-factor product, only identifiers. @@ identifier SIZE, COUNT; @@ - kzalloc + kcalloc ( - SIZE * COUNT + COUNT, SIZE , ...) // 3-factor product with 1 sizeof(type) or sizeof(expression), with // redundant parens removed. @@ expression THING; identifier STRIDE, COUNT; type TYPE; @@ ( kzalloc( - sizeof(TYPE) * (COUNT) * (STRIDE) + array3_size(COUNT, STRIDE, sizeof(TYPE)) , ...) | kzalloc( - sizeof(TYPE) * (COUNT) * STRIDE + array3_size(COUNT, STRIDE, sizeof(TYPE)) , ...) | kzalloc( - sizeof(TYPE) * COUNT * (STRIDE) + array3_size(COUNT, STRIDE, sizeof(TYPE)) , ...) | kzalloc( - sizeof(TYPE) * COUNT * STRIDE + array3_size(COUNT, STRIDE, sizeof(TYPE)) , ...) | kzalloc( - sizeof(THING) * (COUNT) * (STRIDE) + array3_size(COUNT, STRIDE, sizeof(THING)) , ...) | kzalloc( - sizeof(THING) * (COUNT) * STRIDE + array3_size(COUNT, STRIDE, sizeof(THING)) , ...) | kzalloc( - sizeof(THING) * COUNT * (STRIDE) + array3_size(COUNT, STRIDE, sizeof(THING)) , ...) | kzalloc( - sizeof(THING) * COUNT * STRIDE + array3_size(COUNT, STRIDE, sizeof(THING)) , ...) ) // 3-factor product with 2 sizeof(variable), with redundant parens removed. @@ expression THING1, THING2; identifier COUNT; type TYPE1, TYPE2; @@ ( kzalloc( - sizeof(TYPE1) * sizeof(TYPE2) * COUNT + array3_size(COUNT, sizeof(TYPE1), sizeof(TYPE2)) , ...) | kzalloc( - sizeof(TYPE1) * sizeof(THING2) * (COUNT) + array3_size(COUNT, sizeof(TYPE1), sizeof(TYPE2)) , ...) | kzalloc( - sizeof(THING1) * sizeof(THING2) * COUNT + array3_size(COUNT, sizeof(THING1), sizeof(THING2)) , ...) | kzalloc( - sizeof(THING1) * sizeof(THING2) * (COUNT) + array3_size(COUNT, sizeof(THING1), sizeof(THING2)) , ...) | kzalloc( - sizeof(TYPE1) * sizeof(THING2) * COUNT + array3_size(COUNT, sizeof(TYPE1), sizeof(THING2)) , ...) | kzalloc( - sizeof(TYPE1) * sizeof(THING2) * (COUNT) + array3_size(COUNT, sizeof(TYPE1), sizeof(THING2)) , ...) ) // 3-factor product, only identifiers, with redundant parens removed. @@ identifier STRIDE, SIZE, COUNT; @@ ( kzalloc( - (COUNT) * STRIDE * SIZE + array3_size(COUNT, STRIDE, SIZE) , ...) | kzalloc( - COUNT * (STRIDE) * SIZE + array3_size(COUNT, STRIDE, SIZE) , ...) | kzalloc( - COUNT * STRIDE * (SIZE) + array3_size(COUNT, STRIDE, SIZE) , ...) | kzalloc( - (COUNT) * (STRIDE) * SIZE + array3_size(COUNT, STRIDE, SIZE) , ...) | kzalloc( - COUNT * (STRIDE) * (SIZE) + array3_size(COUNT, STRIDE, SIZE) , ...) | kzalloc( - (COUNT) * STRIDE * (SIZE) + array3_size(COUNT, STRIDE, SIZE) , ...) | kzalloc( - (COUNT) * (STRIDE) * (SIZE) + array3_size(COUNT, STRIDE, SIZE) , ...) | kzalloc( - COUNT * STRIDE * SIZE + array3_size(COUNT, STRIDE, SIZE) , ...) ) // Any remaining multi-factor products, first at least 3-factor products, // when they're not all constants... @@ expression E1, E2, E3; constant C1, C2, C3; @@ ( kzalloc(C1 * C2 * C3, ...) | kzalloc( - (E1) * E2 * E3 + array3_size(E1, E2, E3) , ...) | kzalloc( - (E1) * (E2) * E3 + array3_size(E1, E2, E3) , ...) | kzalloc( - (E1) * (E2) * (E3) + array3_size(E1, E2, E3) , ...) | kzalloc( - E1 * E2 * E3 + array3_size(E1, E2, E3) , ...) ) // And then all remaining 2 factors products when they're not all constants, // keeping sizeof() as the second factor argument. @@ expression THING, E1, E2; type TYPE; constant C1, C2, C3; @@ ( kzalloc(sizeof(THING) * C2, ...) | kzalloc(sizeof(TYPE) * C2, ...) | kzalloc(C1 * C2 * C3, ...) | kzalloc(C1 * C2, ...) | - kzalloc + kcalloc ( - sizeof(TYPE) * (E2) + E2, sizeof(TYPE) , ...) | - kzalloc + kcalloc ( - sizeof(TYPE) * E2 + E2, sizeof(TYPE) , ...) | - kzalloc + kcalloc ( - sizeof(THING) * (E2) + E2, sizeof(THING) , ...) | - kzalloc + kcalloc ( - sizeof(THING) * E2 + E2, sizeof(THING) , ...) | - kzalloc + kcalloc ( - (E1) * E2 + E1, E2 , ...) | - kzalloc + kcalloc ( - (E1) * (E2) + E1, E2 , ...) | - kzalloc + kcalloc ( - E1 * E2 + E1, E2 , ...) ) Signed-off-by: Kees Cook <keescook@chromium.org>
2018-03-15iommu/omap: Increase group ref in .device_group()Jeffy Chen1-1/+1
Increase group refcounting in omap_iommu_device_group(). Signed-off-by: Jeffy Chen <jeffy.chen@rock-chips.com> Signed-off-by: Joerg Roedel <jroedel@suse.de>
2017-09-19iommu/omap: Add support to program multiple iommusSuman Anna1-87/+271
A client user instantiates and attaches to an iommu_domain to program the OMAP IOMMU associated with the domain. The iommus programmed by a client user are bound with the iommu_domain through the user's device archdata. The OMAP IOMMU driver currently supports only one IOMMU per IOMMU domain per user. The OMAP IOMMU driver has been enhanced to support allowing multiple IOMMUs to be programmed by a single client user. This support is being added mainly to handle the DSP subsystems on the DRA7xx SoCs, which have two MMUs within the same subsystem. These MMUs provide translations for a processor core port and an internal EDMA port. This support allows both the MMUs to be programmed together, but with each one retaining it's own internal state objects. The internal EDMA block is managed by the software running on the DSPs, and this design provides on-par functionality with previous generation OMAP DSPs where the EDMA and the DSP core shared the same MMU. The multiple iommus are expected to be provided through a sentinel terminated array of omap_iommu_arch_data objects through the client user's device archdata. The OMAP driver core is enhanced to loop through the array of attached iommus and program them for all common operations. The sentinel-terminated logic is used so as to not change the omap_iommu_arch_data structure. NOTE: 1. The IOMMU group and IOMMU core registration is done only for the DSP processor core MMU even though both MMUs are represented by their own platform device and are probed individually. The IOMMU device linking uses this registered MMU device. The struct iommu_device for the second MMU is not used even though memory for it is allocated. 2. The OMAP IOMMU debugfs code still continues to operate on individual IOMMU objects. Signed-off-by: Suman Anna <s-anna@ti.com> [t-kristo@ti.com: ported support to 4.13 based kernel] Signed-off-by: Tero Kristo <t-kristo@ti.com> Signed-off-by: Joerg Roedel <jroedel@suse.de>
2017-09-19iommu/omap: Change the attach detection logicSuman Anna1-6/+11
The OMAP IOMMU driver allows only a single device (eg: a rproc device) to be attached per domain. The current attach detection logic relies on a check for an attached iommu for the respective client device. Change this logic to use the client device pointer instead in preparation for supporting multiple iommu devices to be bound to a single iommu domain, and thereby to a client device. Signed-off-by: Suman Anna <s-anna@ti.com> Signed-off-by: Joerg Roedel <jroedel@suse.de>
2017-08-04iommu/omap: Use DMA-API for performing cache flushesJosue Albarran1-44/+79
The OMAP IOMMU driver was using ARM assembly code directly for flushing the MMU page table entries from the caches. This caused MMU faults on OMAP4 (Cortex-A9 based SoCs) as L2 caches were not handled due to the presence of a PL310 L2 Cache Controller. These faults were however not seen on OMAP5/DRA7 SoCs (Cortex-A15 based SoCs). The OMAP IOMMU driver is adapted to use the DMA Streaming API instead now to flush the page table/directory table entries from the CPU caches. This ensures that the devices always see the updated page table entries. The outer caches are now addressed automatically with the usage of the DMA API. Signed-off-by: Josue Albarran <j-albarran@ti.com> Acked-by: Suman Anna <s-anna@ti.com> Signed-off-by: Joerg Roedel <jroedel@suse.de>
2017-08-04iommu/omap: Fix disabling of MMU upon a faultFernando Guzman Lugo1-1/+1
The IOMMU framework lets its client users be notified on a MMU fault and allows them to either handle the interrupt by dynamic reloading of an appropriate TLB/PTE for the offending fault address or to completely restart/recovery the device and its IOMMU. The OMAP remoteproc driver performs the latter option, and does so after unwinding the previous mappings. The OMAP IOMMU fault handler however disables the MMU and cuts off the clock upon a MMU fault at present, resulting in an interconnect abort during any subsequent operation that touches the MMU registers. So, disable the IP-level fault interrupts instead of disabling the MMU, to allow continued MMU register operations as well as to avoid getting interrupted again. Signed-off-by: Fernando Guzman Lugo <fernando.lugo@ti.com> [s-anna@ti.com: add commit description] Signed-off-by: Suman Anna <s-anna@ti.com> Signed-off-by: Josue Albarran <j-albarran@ti.com> Acked-by: Suman Anna <s-anna@ti.com> Signed-off-by: Joerg Roedel <jroedel@suse.de>
2017-06-28iommu/omap: Return ERR_PTR in device_group call-backJoerg Roedel1-1/+1
Make sure that the device_group callback returns an ERR_PTR instead of NULL. Signed-off-by: Joerg Roedel <jroedel@suse.de>
2017-04-20iommu/omap: Add iommu-group supportJoerg Roedel1-1/+38
Support for IOMMU groups will become mandatory for drivers, so add it to the omap iommu driver. Signed-off-by: Joerg Roedel <jroedel@suse.de> [s-anna@ti.com: minor error cleanups] Signed-off-by: Suman Anna <s-anna@ti.com> Signed-off-by: Joerg Roedel <jroedel@suse.de>
2017-04-20iommu/omap: Make use of 'struct iommu_device'Joerg Roedel1-0/+30
Modify the driver to register individual iommus and establish links between devices and iommus in sysfs. Signed-off-by: Joerg Roedel <jroedel@suse.de> [s-anna@ti.com: fix some cleanup issues during failures] Signed-off-by: Suman Anna <s-anna@ti.com> Signed-off-by: Joerg Roedel <jroedel@suse.de>
2017-04-20iommu/omap: Store iommu_dev pointer in arch_dataJoerg Roedel1-33/+23
Instead of finding the matching IOMMU for a device using string comparision functions, store the pointer to the iommu_dev in arch_data during the omap_iommu_add_device callback and reset it during the omap_iommu_remove_device callback functions. Signed-off-by: Joerg Roedel <jroedel@suse.de> [s-anna@ti.com: few minor cleanups] Signed-off-by: Suman Anna <s-anna@ti.com> Signed-off-by: Joerg Roedel <jroedel@suse.de>
2017-04-20iommu/omap: Move data structures to omap-iommu.hJoerg Roedel1-16/+0
The internal data-structures are scattered over various header and C files. Consolidate them in omap-iommu.h. While at this, add the kerneldoc comment for the missing iommu domain variable and revise the iommu_arch_data name. Signed-off-by: Joerg Roedel <jroedel@suse.de> [s-anna@ti.com: revise kerneldoc comments] Signed-off-by: Suman Anna <s-anna@ti.com> Signed-off-by: Joerg Roedel <jroedel@suse.de>
2017-04-20iommu/omap: Drop legacy-style device supportSuman Anna1-16/+14
All the supported boards that have OMAP IOMMU devices do support DT boot only now. So, drop the support for the non-DT legacy-style devices from the OMAP IOMMU driver. Couple of the fields from the iommu platform data would no longer be required, so they have also been cleaned up. The IOMMU platform data is still needed though for performing reset management properly in a multi-arch environment. Signed-off-by: Suman Anna <s-anna@ti.com> Signed-off-by: Joerg Roedel <jroedel@suse.de>
2017-04-20iommu/omap: Register driver before setting IOMMU opsSuman Anna1-3/+18
Move the registration of the OMAP IOMMU platform driver before setting the IOMMU callbacks on the platform bus. This causes the IOMMU devices to be probed first before the .add_device() callback is invoked for all registered devices, and allows the iommu_group support to be added to the OMAP IOMMU driver. While at this, also check for the return status from bus_set_iommu. Signed-off-by: Suman Anna <s-anna@ti.com> Signed-off-by: Joerg Roedel <jroedel@suse.de>
2016-04-05iommu/omap: Use WARN_ON for page table alignment checkSuman Anna1-1/+4
The OMAP IOMMU page table needs to be aligned on a 16K boundary, and the current code uses a BUG_ON on the alignment sanity check in the .domain_alloc() ops implementation. Replace this with a less severe WARN_ON and bail out gracefully. Signed-off-by: Suman Anna <s-anna@ti.com> Signed-off-by: Joerg Roedel <jroedel@suse.de>
2016-04-05iommu/omap: Replace BUG() in iopgtable_store_entry_core()Suman Anna1-1/+3
The iopgtable_store_entry_core() function uses a BUG() statement for an unsupported page size entry programming. Replace this with a less severe WARN_ON() and perform a graceful bailout on error. Signed-off-by: Suman Anna <s-anna@ti.com> Signed-off-by: Joerg Roedel <jroedel@suse.de>
2016-04-05iommu/omap: Remove iopgtable_clear_entry_all() from driver removeSuman Anna1-1/+0
The function iopgtable_clear_entry_all() is used for clearing all the page table entries. These entries are neither created nor initialized during the OMAP IOMMU driver probe, and are managed only when a client device attaches to the IOMMU. So, there is no need to invoke this function on a driver remove. Removing this fixes a NULL pointer dereference crash if the IOMMU device is unbound from the driver with no client device attached to the IOMMU device. Signed-off-by: Suman Anna <s-anna@ti.com> Signed-off-by: Joerg Roedel <jroedel@suse.de>
2015-10-14iommu/omap: Add support for configuring dsp iommus on DRA7xxSuman Anna1-0/+58
The DSP MMUs on DRA7xx SoC requires configuring an additional MMU_CONFIG register present in the DSP_SYSTEM sub module. This setting dictates whether the DSP Core's MDMA and EDMA traffic is routed through the respective MMU or not. Add the support to the OMAP iommu driver so that the traffic is not bypassed when enabling the MMUs. The MMU_CONFIG register has two different bits for enabling each of these two MMUs present in the DSP processor sub-system on DRA7xx. An id field is added to the OMAP iommu object to identify and enable each IOMMU. The id information and the DSP_SYSTEM.MMU_CONFIG register programming is achieved through the processing of the optional "ti,syscon-mmuconfig" property. A proper value is assigned to the id field only when this property is present. Signed-off-by: Suman Anna <s-anna@ti.com> Signed-off-by: Joerg Roedel <jroedel@suse.de>
2015-08-03iommu/omap: Align code with open parenthesisSuman Anna1-12/+11
Fix all the occurrences of the following check warning generated with the checkpatch --strict option: "CHECK: Alignment should match open parenthesis" Signed-off-by: Suman Anna <s-anna@ti.com> Signed-off-by: Joerg Roedel <jroedel@suse.de>
2015-08-03iommu/omap: Remove unnecessary error traces on alloc failuresSuman Anna1-6/+2
Fix couple of checkpatch warnings of the type, "WARNING: Possible unnecessary 'out of memory' message" Signed-off-by: Suman Anna <s-anna@ti.com> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Joerg Roedel <jroedel@suse.de>
2015-08-03iommu/omap: Move debugfs functions to omap-iommu-debug.cSuman Anna1-145/+3
The main OMAP IOMMU driver file has some helper functions used by the OMAP IOMMU debugfs functionality, and there is already a dedicated source file omap-iommu-debug.c dealing with these debugfs routines. Move all these functions to the omap-iommu-debug.c file, so that all the debugfs related routines are in one place. The move required exposing some new functions and moving some definitions to the internal omap-iommu.h header file. Signed-off-by: Suman Anna <s-anna@ti.com> Signed-off-by: Joerg Roedel <jroedel@suse.de>
2015-08-03iommu/omap: Remove all module referencesSuman Anna1-18/+1
The OMAP IOMMU driver has been adapted to the IOMMU framework for a while now, and it does not support being built as a module anymore. So, remove all the module references from the OMAP IOMMU driver. While at it, also relocate a comment around the subsys_initcall to avoid a checkpatch strict warning about using a blank line after function/struct/union/enum declarations. Signed-off-by: Suman Anna <s-anna@ti.com> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Joerg Roedel <jroedel@suse.de>
2015-03-31iommu/omap: Make use of domain_alloc and domain_freeJoerg Roedel1-20/+29
Implement the new domain_alloc and domain_free call-backs and remove the old domain_init/destroy ones. Signed-off-by: Joerg Roedel <jroedel@suse.de>
2015-02-25iommu/omap: Play nice in multi-platform buildsThierry Reding1-0/+7
The OMAP IOMMU driver unconditionally executes code and registers a struct iommu_ops with the platform bus irrespective of whether it runs on an OMAP SoC or not. This causes problems in multi-platform kernels where drivers for other SoCs will no longer be able to register their own struct iommu_ops or even try to use a struct iommu_ops for an IOMMU that obviously isn't there. The smallest fix I could think of is to check for the existence of any OMAP IOMMU devices in the device tree and skip initialization otherwise. This fixes a problem on Tegra20 where the DRM driver will try to use the obviously non-existent OMAP IOMMU. Reported-by: Nicolas Chauvet <kwizart@gmail.com> Cc: Tony Lindgren <tony@atomide.com> Cc: Suman Anna <s-anna@ti.com> Cc: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Thierry Reding <treding@nvidia.com> Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Joerg Roedel <jroedel@suse.de>
2015-01-30iommu/omap: Print phys_addr_t using %paJoerg Roedel1-1/+1
Fixes this compile warning: drivers/iommu/omap-iommu.c: In function 'omap_iommu_map': drivers/iommu/omap-iommu.c:1139:2: warning: format '%x' expects argument of type 'unsigned int', but argument 5 has type 'phys_addr_t' [-Wformat=] dev_dbg(dev, "mapping da 0x%lx to pa 0x%x size 0x%x\n", da, pa, bytes); Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-12-02Merge branches 'arm/omap', 'arm/msm', 'arm/rockchip', 'arm/renesas', ↵Joerg Roedel1-0/+1
'arm/smmu', 'x86/vt-d', 'x86/amd' and 'core' into next Conflicts: drivers/iommu/arm-smmu.c
2014-11-04iommu/omap: Use dev_get_platdata()Kiran Padwal1-3/+3
Use the wrapper function for retrieving the platform data instead of accessing dev->platform_data directly. Signed-off-by: Kiran Padwal <kiran.padwal@smartplayin.com> Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-11-04iommu: Add iommu_map_sg() functionOlav Haugan1-0/+1
Mapping and unmapping are more often than not in the critical path. map_sg allows IOMMU driver implementations to optimize the process of mapping buffers into the IOMMU page tables. Instead of mapping a buffer one page at a time and requiring potentially expensive TLB operations for each page, this function allows the driver to map all pages in one go and defer TLB maintenance until after all pages have been mapped. Additionally, the mapping operation would be faster in general since clients does not have to keep calling map API over and over again for each physically contiguous chunk of memory that needs to be mapped to a virtually contiguous region. Signed-off-by: Olav Haugan <ohaugan@codeaurora.org> Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-10-23iommu/omap: Reset the domain field upon detachingSuman Anna1-0/+1
The .domain field in omap_iommu struct is set properly when the OMAP IOMMU device is attached to, but is never reset properly on detach. Reset this properly so that the OMAP IOMMU debugfs logic can depend on this field before allowing the debugfs operations. Signed-off-by: Suman Anna <s-anna@ti.com> Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-10-23iommu/omap: Do not export unneeded functionsSuman Anna1-4/+2
The following functions were exported previously for usage by the OMAP IOMMU debug module: omap_iommu_dump_ctx() omap_dump_tlb_entries() omap_iopgtable_store_entry() These functions need not be exported anymore as the OMAP IOMMU debugfs code is integrated with the OMAP IOMMU driver, and there won't be external users for these functions. So, remove the EXPORT_SYMBOL_GPL on these. The omap_iopgtable_store_entry() is also made internal only, after making the 'pagetable' debugfs entry read-only. Signed-off-by: Suman Anna <s-anna@ti.com> Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-10-23iommu/omap: Remove couple of unused exported functionsSuman Anna1-21/+0
The exported functions omap_foreach_iommu_device() and omap_iotlb_cr_to_e() have been deleted, as they are no longer needed. The function omap_foreach_iommu_device() is not required after the consolidation of the OMAP IOMMU debug module, and the function omap_iotlb_cr_to_e() is not required after making the debugfs entry 'pagetable' read-only. Signed-off-by: Suman Anna <s-anna@ti.com> Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-10-23iommu/omap: Integrate omap-iommu-debug into omap-iommuSuman Anna1-2/+9
The debugfs support for OMAP IOMMU is currently implemented as a module, warranting certain OMAP-specific IOMMU API to be exported. The OMAP IOMMU, when enabled, can only be built-in into the kernel, so integrate the OMAP IOMMU debug module into the OMAP IOMMU driver. This helps in eliminating the need to export most of the current OMAP IOMMU API. The following are the main changes: - The debugfs directory and entry creation logic is reversed, the calls are invoked by the OMAP IOMMU driver now. - The current iffy circular logic of adding IOMMU archdata to the IOMMU devices itself to get a pointer to the omap_iommu object in the debugfs support code is replaced by directly using the omap_iommu structure while creating the debugfs entries. - The debugfs root directory is renamed from the generic name "iommu" to a specific name "omap_iommu". - Unneeded headers have also been cleaned up while at this. - There will no longer be a omap-iommu-debug.ko module after this patch. - The OMAP_IOMMU_DEBUG Kconfig option is converted to boolean only, the OMAP IOMMU debugfs support is built alongside the OMAP IOMMU driver only when this option is enabled. Signed-off-by: Suman Anna <s-anna@ti.com> Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-10-23iommu/omap: Consolidate OMAP IOMMU modulesSuman Anna1-75/+188
The OMAP IOMMU driver was originally designed as modules, and split into a core module and a thin arch-specific module through the OMAP arch-specific struct iommu_functions, to scale for both OMAP1 and OMAP2+ IOMMU variants. The driver can only be built for OMAP2+ platforms currently, and also can only be built-in after the adaptation to generic IOMMU API. The OMAP1 variant was never added and will most probably be never added (the code for the only potential user, its parent, DSP processor has already been cleaned up). So, consolidate the OMAP2 specific omap-iommu2 module into the core OMAP IOMMU driver - this eliminates the arch-specific ops structure and simplifies the driver into a single module that only implements the generic IOMMU API's iommu_ops. The following are the main changes: - omap-iommu2 module is completely eliminated, with the common definitions moved to the internal omap-iommu.h, and the ops implementations moved into omap-iommu.c - OMAP arch-specific struct iommu_functions is also eliminated, with the ops implementations directly absorbed into the calling functions - iotlb_alloc_cr() is no longer inlined and defined only when PREFETCH_IOTLB is defined - iotlb_dump_cr() is similarly defined only when CONFIG_OMAP_IOMMU_DEBUG is defined - Elimination of the OMAP IOMMU exported functions to register the arch ops, omap_install_iommu_arch() & omap_uninstall_iommu_arch() - Any stale comments about OMAP1 are also cleaned up Signed-off-by: Suman Anna <s-anna@ti.com> Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-10-23iommu/omap: Remove omap_iommu_arch_version() and version fieldSuman Anna1-9/+0
The function omap_iommu_arch_version() is not used anymore, and is not required either, so remove it. The .version field in struct iommu_functions that this function uses is also removed, as it is not really an ops to retrieve a version and there won't be any usage for this field either. Signed-off-by: Suman Anna <s-anna@ti.com> Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-10-23iommu/omap: Remove refcount field from omap_iommu objectSuman Anna1-12/+3
The refcount field in omap_iommu object is primarily used to check if an IOMMU device has already been enabled, but this is already implicit in the omap_iommu_attach_dev() which ensures that only a single device can attach to an IOMMU. This field is redundant, and so has been cleaned up. Signed-off-by: Suman Anna <s-anna@ti.com> Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-10-02Merge branches 'arm/exynos', 'arm/omap', 'arm/smmu', 'x86/vt-d', 'x86/amd' ↵Joerg Roedel1-12/+15
and 'core' into next Conflicts: drivers/iommu/arm-smmu.c
2014-09-25iommu: Make of_device_id array constKiran Padwal1-1/+1
Make of_device_id array const, because all OF functions handle it as const. Signed-off-by: Kiran Padwal <kiran.padwal@smartplayin.com> Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-09-25iommu/omap: Remove omap_iommu unused owner fieldLaurent Pinchart1-10/+0
The owner field is never set. Remove it. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Acked-by: Suman Anna <s-anna@ti.com> Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-09-05iommu/omap: Fix iommu archdata name for DT-based devicesSuman Anna1-1/+9
A device is tied to an iommu through its archdata field. The archdata is allocated on the fly for DT-based devices automatically through the .add_device iommu ops. The current logic incorrectly assigned the name of the IOMMU user device, instead of the name of the IOMMU device as required by the attach logic. Fix this issue so that DT-based devices can attach successfully to an IOMMU domain. Signed-off-by: Suman Anna <s-anna@ti.com> Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-09-05iommu/omap: Check for valid archdata in attach_devSuman Anna1-0/+5
Any device requiring to be attached to an iommu_domain must have valid archdata containing the necessary iommu information, which is SoC-specific. Add a check in the omap_iommu_attach_dev to make sure that the device has valid archdata before accessing different SoC-specific fields of the archdata. This prevents a NULL pointer dereference on any misconfigured devices. Signed-off-by: Suman Anna <s-anna@ti.com> Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-07-31Merge branches 'x86/vt-d', 'x86/amd', 'arm/omap', 'ppc/pamu', 'arm/smmu', ↵Joerg Roedel1-13/+0
'arm/exynos' and 'core' into next
2014-07-29iommu/omap: Remove virtual memory managerLaurent Pinchart1-13/+0
The OMAP3 ISP driver was the only user of the OMAP IOVMM API. Now that is has been ported to the DMA API, remove the unused virtual memory manager. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-07-07iommu: Constify struct iommu_opsThierry Reding1-1/+1
This structure is read-only data and should never be modified. Signed-off-by: Thierry Reding <treding@nvidia.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-04-16iommu/omap: Fix map protection value handlingLaurent Pinchart1-10/+7
The prot flags passed to the IOMMU map handler are defined in include/linux/iommu.h as IOMMU_(READ|WRITE|CACHE|EXEC). However, the driver expects to receive MMU_RAM_* OMAP-specific flags. This causes IOMMU flags being interpreted as page sizes, leading to failures. Hardcode the OMAP mapping parameters to little-endian, 8-bits and non-mixed page attributes. Furthermore, as the OMAP IOMMU doesn't support read-only or write-only mappings, ignore the prot value. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Sakari Ailus <sakari.ailus@iki.fi> Acked-by: Suman Anna <s-anna@ti.com>
2014-04-16iommu/omap: Remove comment about supporting single page mappings onlyLaurent Pinchart1-1/+0
The IOMMU core breaks out mappings into pages already, there's no need to support mapping multiple pages in one go. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Sakari Ailus <sakari.ailus@iki.fi>
2014-04-16iommu/omap: Fix 'no page for' debug message in flush_iotlb_page()Laurent Pinchart1-0/+1
The flush_iotlb_page() function prints a debug message when no corresponding page was found in the TLB. That condition is incorrectly checked and always resolves to true, given that the for_each_iotlb_cr() loop is never interrupted and always reaches obj->nr_tlb_entries. Given that we can't have two TLB entries for the same VA, break from the loop when a match is found. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Acked-by: Suman Anna <s-anna@ti.com>
2014-04-16iommu/omap: Move to_iommu definition from omap-iopgtable.hSuman Anna1-0/+3
The to_iommu definition is used only locally to the omap-iommu.c source file, and it has nothing to do with the page attributes defined in omap-iopgtable.h. So, move the definition out of omap-iopgtable.h header file. Signed-off-by: Suman Anna <s-anna@ti.com> Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
2014-04-16iommu/omap: Remove omap_iommu_domain_has_cap() functionSuman Anna1-7/+0
The current OMAP IOMMU ops for .domain_has_cap is a stub, and the iommu core already returns a value of 0 if the domain doesn't have a .domain_has_cap ops plugged in. So, clean up this stub function. Signed-off-by: Suman Anna <s-anna@ti.com> Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
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