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path: root/drivers/iommu/fsl_pamu.c
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2022-04-28iommu/fsl_pamu: Prepare cleanup of powerpc's asm/prom.hChristophe Leroy1-0/+3
powerpc's asm/prom.h brings some headers that it doesn't need itself. In order to clean it up, first add missing headers in users of asm/prom.h Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu> Link: https://lore.kernel.org/r/06862cca930068e8fa4fdd0b20d74872d3b929d6.1648833431.git.christophe.leroy@csgroup.eu Signed-off-by: Joerg Roedel <jroedel@suse.de>
2021-04-07iommu/fsl_pamu: hardcode the window address and size in pamu_config_ppaaceChristoph Hellwig1-19/+4
The win_addr and win_size parameters are always set to 0 and 1 << 36 respectively, so just hard code them. Signed-off-by: Christoph Hellwig <hch@lst.de> Link: https://lore.kernel.org/r/20210401155256.298656-14-hch@lst.de Signed-off-by: Joerg Roedel <jroedel@suse.de>
2021-04-07iommu/fsl_pamu: remove the rpn and snoop_id arguments to pamu_config_ppaacChristoph Hellwig1-11/+3
These are always wired to fixed values, so don't bother passing them as arguments. Signed-off-by: Christoph Hellwig <hch@lst.de> Link: https://lore.kernel.org/r/20210401155256.298656-13-hch@lst.de Signed-off-by: Joerg Roedel <jroedel@suse.de>
2021-04-07iommu/fsl_pamu: remove support for multiple windowsChristoph Hellwig1-256/+8
The only domains allocated forces use of a single window. Remove all the code related to multiple window support, as well as the need for qman_portal to force a single window. Remove the now unused DOMAIN_ATTR_WINDOWS iommu_attr. Signed-off-by: Christoph Hellwig <hch@lst.de> Acked-by: Will Deacon <will@kernel.org> Acked-by: Li Yang <leoyang.li@nxp.com> Link: https://lore.kernel.org/r/20210401155256.298656-6-hch@lst.de Signed-off-by: Joerg Roedel <jroedel@suse.de>
2020-09-18iommu/pamu: Replace use of kzfree with kfree_sensitiveAlex Dewar1-1/+1
kzfree() is effectively deprecated as of commit 453431a54934 ("mm, treewide: rename kzfree() to kfree_sensitive()") and is now simply an alias for kfree_sensitive(). So just replace it with kfree_sensitive(). Signed-off-by: Alex Dewar <alex.dewar90@gmail.com> Link: https://lore.kernel.org/r/20200911135325.66156-1-alex.dewar90@gmail.com Signed-off-by: Joerg Roedel <jroedel@suse.de>
2020-06-30iommu/pamu: Use kzfree() in fsl_pamu_probe()Denis Efremov1-4/+1
Use kzfree() instead of opencoded memset with 0 followed by kfree(). Null check is not required since kzfree() checks for NULL internally. Signed-off-by: Denis Efremov <efremov@linux.com> Link: https://lore.kernel.org/r/20200604123709.96561-1-efremov@linux.com Signed-off-by: Joerg Roedel <jroedel@suse.de>
2019-06-05treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 266Thomas Gleixner1-13/+1
Based on 1 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms of the gnu general public license version 2 as published by the free software foundation this program is distributed in the hope that it will be useful but without any warranty without even the implied warranty of merchantability or fitness for a particular purpose see the gnu general public license for more details you should have received a copy of the gnu general public license along with this program if not write to the free software foundation 51 franklin street fifth floor boston ma 02110 1301 usa extracted by the scancode license scanner the SPDX license identifier GPL-2.0-only has been chosen to replace the boilerplate/reference in 67 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Allison Randal <allison@lohutok.net> Reviewed-by: Richard Fontana <rfontana@redhat.com> Reviewed-by: Alexios Zavras <alexios.zavras@intel.com> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190529141333.953658117@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-09-28iommu: fsl_pamu: use for_each_of_cpu_node iteratorRob Herring1-1/+1
Use the for_each_of_cpu_node iterator to iterate over cpu nodes. This has the side effect of defaulting to iterating using "cpu" node names in preference to the deprecated (for FDT) device_type == "cpu". Cc: Joerg Roedel <joro@8bytes.org> Cc: iommu@lists.linux-foundation.org Signed-off-by: Rob Herring <robh@kernel.org>
2017-09-01Merge branches 'arm/exynos', 'arm/renesas', 'arm/rockchip', 'arm/omap', ↵Joerg Roedel1-12/+15
'arm/mediatek', 'arm/tegra', 'arm/qcom', 'arm/smmu', 'ppc/pamu', 'x86/vt-d', 'x86/amd', 's390' and 'core' into next
2017-08-23iommu/pamu: Fix PAMU boot crashJoerg Roedel1-17/+0
Commit 68a17f0be6fe introduced an initialization order problem, where devices are linked against an iommu which is not yet initialized. Fix it by initializing the iommu-device before the iommu-ops are registered against the bus. Reported-by: Michael Ellerman <mpe@ellerman.id.au> Fixes: 68a17f0be6fe ('iommu/pamu: Add support for generic iommu-device') Signed-off-by: Joerg Roedel <jroedel@suse.de>
2017-08-15iommu/pamu: Add support for generic iommu-deviceJoerg Roedel1-0/+17
This patch adds a global iommu-handle to the pamu driver and initializes it at probe time. Also link devices added to the iommu to this handle. Signed-off-by: Joerg Roedel <jroedel@suse.de>
2017-08-15iommu/pamu: WARN when fsl_pamu_probe() is called more than onceJoerg Roedel1-0/+7
The function probes the PAMU hardware from device-tree specifications. It initializes global variables and can thus be only safely called once. Add a check that that prints a warning when its called more than once. Signed-off-by: Joerg Roedel <jroedel@suse.de>
2017-07-26iommu: Convert to using %pOF instead of full_nameRob Herring1-12/+8
Now that we have a custom printf format specifier, convert users of full_name to use %pOF instead. This is preparation to remove storing of the full path string for each node. Signed-off-by: Rob Herring <robh@kernel.org> Cc: Joerg Roedel <joro@8bytes.org> Cc: Heiko Stuebner <heiko@sntech.de> Cc: iommu@lists.linux-foundation.org Cc: linux-arm-kernel@lists.infradead.org Cc: linux-rockchip@lists.infradead.org Reviewed-by: Heiko Stuebner <heiko@sntech.de> Signed-off-by: Joerg Roedel <jroedel@suse.de>
2015-10-22powerpc/fsl: Move fsl_guts.h out of arch/powerpcScott Wood1-1/+1
Freescale's Layerscape ARM chips use the same structure. Signed-off-by: Scott Wood <scottwood@freescale.com>
2015-08-18iommu/fsl: Really fix init section(s) contentEmil Medve1-13/+13
'0f1fb99 iommu/fsl: Fix section mismatch' was intended to address the modpost warning and the potential crash. Crash which is actually easy to trigger with a 'unbind' followed by a 'bind' sequence. The fix is wrong as fsl_of_pamu_driver.driver gets added by bus_add_driver() to a couple of klist(s) which become invalid/corrupted as soon as the init sections are freed. Depending on when/how the init sections storage is reused various/random errors and crashes will happen 'cd70d46 iommu/fsl: Various cleanups' contains annotations that go further down the wrong path laid by '0f1fb99 iommu/fsl: Fix section mismatch' Now remove all the incorrect annotations from the above mentioned patches (not exactly a revert) and those previously existing in the code, This fixes the modpost warning(s), the unbind/bind sequence crashes and the random errors/crashes Fixes: 0f1fb99b62ce ("iommu/fsl: Fix section mismatch") Fixes: cd70d4659ff3 ("iommu/fsl: Various cleanups") Signed-off-by: Emil Medve <Emilian.Medve@Freescale.com> Acked-by: Varun Sethi <Varun.Sethi@freescale.com> Cc: stable@vger.kernel.org Tested-by: Madalin Bucur <Madalin.Bucur@freescale.com> Signed-off-by: Joerg Roedel <jroedel@suse.de>
2015-02-03iommu/fsl: Various cleanupsEmil Medve1-108/+95
Currently a PAMU driver patch is very likely to receive some checkpatch complaints about the code in the context of the patch. This patch is an attempt to fix most of that and make the driver more readable Also fixed a subset of the sparse and coccinelle reported issues. Signed-off-by: Emil Medve <Emilian.Medve@Freescale.com> Signed-off-by: Joerg Roedel <jroedel@suse.de>
2015-01-30iommu/fsl: Use %pa to print phys_addr_tJoerg Roedel1-4/+3
Fix compile warnings. Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Joerg Roedel <jroedel@suse.de>
2015-01-26iommu/fsl: Remove unused fsl_of_pamu_ids[]Emil Medve1-10/+0
Signed-off-by: Emil Medve <Emilian.Medve@Freescale.com> Acked-by: Varun Sethi <Varun.Sethi@freescale.com> Signed-off-by: Joerg Roedel <jroedel@suse.de>
2015-01-26iommu/fsl: Fix section mismatchEmil Medve1-1/+1
Section mismatch in reference from the variable fsl_of_pamu_driver to the function .init.text:fsl_pamu_probe() The variable fsl_of_pamu_driver references the function __init fsl_pamu_probe() If the reference is valid then annotate the variable with __init* or __refdata (see linux/init.h) or name the variable: *_template, *_timer, *_sht, *_ops, *_probe, *_probe_one, *_console Signed-off-by: Emil Medve <Emilian.Medve@Freescale.com> Acked-by: Varun Sethi <Varun.Sethi@freescale.com> Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-10-20iommu: drop owner assignment from platform_driversWolfram Sang1-1/+0
A platform_driver does not need to set an owner, it will be populated by the driver core. Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2014-07-31Merge branches 'x86/vt-d', 'x86/amd', 'arm/omap', 'ppc/pamu', 'arm/smmu', ↵Joerg Roedel1-5/+5
'arm/exynos' and 'core' into next
2014-07-07iommu/fsl: Fix PAMU window size check.Varun Sethi1-4/+4
is_power_of_2 requires an unsigned long parameter which would lead to truncation of 64 bit values on 32 bit architectures. __ffs also expects an unsigned long parameter thus won't work for 64 bit values on 32 bit architectures. Signed-off-by: Varun Sethi <Varun.Sethi@freescale.com> Tested-by: Emil Medve <Emilian.Medve@Freescale.com> Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-07-04iommu/fsl: Add void declarations in zero-arg functions.Chi Pham1-1/+1
Added explicit void declarations to zero-argument function headers. The following coccinelle script was used: @addvoid@ identifier f; @@ f( + void ) { ... } Signed-off-by: Chi Pham <fempsci@gmail.com> Signed-off-by: Joerg Roedel <jroedel@suse.de>
2014-05-26iommu: fsl_pamu.c: Fix for possible null pointer dereferenceRickard Strandqvist1-2/+1
There is otherwise a risk of a possible null pointer dereference. Was largely found by using a static code analysis program called cppcheck. Signed-off-by: Rickard Strandqvist <rickard_strandqvist@spectrumdigital.se> Reviewed-by: Bharat Bhushan <bharat.bhushan@freescale.com> Acked-by: Varun Sethi <Varun.Sethi@freescale.com> Signed-off-by: Joerg Roedel <jroedel@suse.de>
2013-08-14iommu/fsl: Remove unnecessary 'fsl-pamu' prefixesJoerg Roedel1-5/+5
The file defines a pr_fmt macro, so there is no need to add this prefix to individual messages. Signed-off-by: Joerg Roedel <joro@8bytes.org>
2013-08-14iommu/fsl: Freescale PAMU driver and iommu implementation.Varun Sethi1-0/+1309
Following is a brief description of the PAMU hardware: PAMU determines what action to take and whether to authorize the action on the basis of the memory address, a Logical IO Device Number (LIODN), and PAACT table (logically) indexed by LIODN and address. Hardware devices which need to access memory must provide an LIODN in addition to the memory address. Peripheral Access Authorization and Control Tables (PAACTs) are the primary data structures used by PAMU. A PAACT is a table of peripheral access authorization and control entries (PAACE).Each PAACE defines the range of I/O bus address space that is accessible by the LIOD and the associated access capabilities. There are two types of PAACTs: primary PAACT (PPAACT) and secondary PAACT (SPAACT).A given physical I/O device may be able to act as one or more independent logical I/O devices (LIODs). Each such logical I/O device is assigned an identifier called logical I/O device number (LIODN). A LIODN is allocated a contiguous portion of the I/O bus address space called the DSA window for performing DSA operations. The DSA window may optionally be divided into multiple sub-windows, each of which may be used to map to a region in system storage space. The first sub-window is referred to as the primary sub-window and the remaining are called secondary sub-windows. This patch provides the PAMU driver (fsl_pamu.c) and the corresponding IOMMU API implementation (fsl_pamu_domain.c). The PAMU hardware driver (fsl_pamu.c) has been derived from the work done by Ashish Kalra and Timur Tabi. [For iommu group support] Acked-by: Alex Williamson <alex.williamson@redhat.com> Signed-off-by: Timur Tabi <timur@tabi.org> Signed-off-by: Varun Sethi <Varun.Sethi@freescale.com> Signed-off-by: Joerg Roedel <joro@8bytes.org>
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