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path: root/drivers/iommu/fsl_pamu.c
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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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