Commit Graph

31 Commits

Author SHA1 Message Date
Cong Ding 0af125ca06 iommu/omap: Remove unnecessary null pointer check
The pointer obj is dereferenced in line 146 and 149 respectively, so it is not
necessary to check null again in line 149 and 175. And I have checked that all
the callers of these two functions guarantee the parameter obj passed is not
null.

Signed-off-by: Cong Ding <dinggnu@gmail.com>
Acked-by: Ohad Ben-Cohen <ohad@wizery.com>
Acked-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Joerg Roedel <joro@8bytes.org>
2013-01-28 15:21:27 +01:00
Greg Kroah-Hartman d34d6517ea Drivers: iommu: remove __dev* attributes.
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>
2013-01-03 15:57:14 -08:00
Omar Ramirez Luna ebf7cda0f9 iommu/omap: Adapt to runtime pm
Use runtime PM functionality interfaced with hwmod enable/idle
functions, to replace direct clock operations and sysconfig
handling.

Due to reset sequence, pm_runtime_[get|put]_sync must be used, to
avoid possible operations with the module under reset. Because of
this and given that the driver uses spin_locks to protect their
critical sections, we must use pm_runtime_irq_safe in order for the
runtime ops to be happy, otherwise might_sleep_if checks in runtime
framework will complain.

The remaining pm_runtime out of iommu_enable and iommu_disable
corresponds to paths that can be accessed through debugfs, some of
them doesn't work if the module is not enabled first, but in future
if the mmu is idled withouth freeing, these are needed to debug.

Signed-off-by: Omar Ramirez Luna <omar.luna@linaro.org>
Tested-by: Ohad Ben-Cohen <ohad@wizery.com>
Acked-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Joerg Roedel <joro@8bytes.org>
2012-12-03 18:48:23 +01:00
Omar Ramirez Luna 72b15b6ae9 iommu/omap: Migrate to hwmod framework
Use hwmod data and device attributes to build and register an
omap device for iommu driver.

 - Update the naming convention in isp module.
 - Remove unneeded check for number of resources, as this is now
   handled by omap_device and prevents driver from loading.
 - Now unused, remove platform device and resource data, handling
   of sysconfig register for softreset purposes, use default
   latency structure.
 - Use hwmod API for reset handling.

Signed-off-by: Omar Ramirez Luna <omar.luna@linaro.org>
Tested-by: Ohad Ben-Cohen <ohad@wizery.com>
Signed-off-by: Joerg Roedel <joro@8bytes.org>
2012-12-03 18:48:13 +01:00
Omar Ramirez Luna 87f8e57327 iommu/omap: Keep mmu enabled when requested
The purpose of the mmu is to handle the memory accesses requested by
its users. Typically, the mmu is bundled with the processing unit in
a single IP block, which makes them to share the same clock to be
functional.

Currently, iommu code assumes that its user will be indirectly
clocking it, but being a separate mmu driver, it should handle
its own clocks, so as long as the mmu is requested it will be
powered ON and once detached it will be powered OFF.

The remaining clock handling out of iommu_enable and iommu_disable
corresponds to paths that can be accessed through debugfs, some of
them doesn't work if the module is not enabled first, but in future
if the mmu is idled withouth freeing, these are needed to debug.

Signed-off-by: Omar Ramirez Luna <omar.luna@linaro.org>
Tested-by: Ohad Ben-Cohen <ohad@wizery.com>
Signed-off-by: Joerg Roedel <joro@8bytes.org>
2012-12-03 18:48:01 +01:00
Omar Ramirez Luna a33977206c iommu/omap: Remove redundant clock handling on ISR
For the interrupt to be generated, the mmu clock should be already
enabled while translating a virtual address, so, this call to clock
handling is just increasing/decreasing the counter.

This works now, because its users need the same clock and they
indirectly power the mmu, in this interrupt context the handling of
clocks inside the ISR doesn't seem to be needed nor helping.

Next patch should also correct the dependency on clients to handle
iommu clocks.

Signed-off-by: Omar Ramirez Luna <omar.luna@linaro.org>
Tested-by: Ohad Ben-Cohen <ohad@wizery.com>
Signed-off-by: Joerg Roedel <joro@8bytes.org>
2012-12-03 18:47:30 +01:00
Tony Lindgren 2ab7c84815 ARM: OMAP2+: Move iommu/iovmm headers to platform_data
Move iommu/iovmm headers from plat/ to platform_data/ as part of the
single zImage work.

Partially based on an earlier version by Ido Yariv <ido@wizery.com>.

Cc: Ido Yariv <ido@wizery.com>
Cc: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Cc: Omar Ramirez Luna <omar.luna@linaro.org>
Acked-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Acked-by: Ohad Ben-Cohen <ohad@wizery.com>
Acked-by: Joerg Roedel <joro@8bytes.org>
Signed-off-by: Tony Lindgren <tony@atomide.com>
2012-11-20 10:05:01 -08:00
Ido Yariv 7bd9e25fa4 ARM: OMAP2+: Make some definitions local
Move some of the definitions in omap-iommu.h that can be made local to
either drivers/iommu.

Cc: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Cc: Mauro Carvalho Chehab <mchehab@infradead.org>
Cc: Omar Ramirez Luna <omar.luna@linaro.org>
Signed-off-by: Ido Yariv <ido@wizery.com>
Acked-by: Ohad Ben-Cohen <ohad@wizery.com>
Acked-by: Joerg Roedel <joro@8bytes.org>
[tony@atomide.com: updated for header changes in the series]
Signed-off-by: Tony Lindgren <tony@atomide.com>
2012-11-20 10:04:51 -08:00
Tony Lindgren ed1c7de29f ARM: OMAP2+: Move iommu2 to drivers/iommu/omap-iommu2.c
This file should not be in arch/arm. Move it to drivers/iommu
to allow making most of the header local to drivers/iommu.

This is needed as we are removing plat and mach includes
from drivers for ARM common zImage support.

Cc: Ido Yariv <ido@wizery.com>
Cc: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Cc: Mauro Carvalho Chehab <mchehab@infradead.org>
Cc: Omar Ramirez Luna <omar.luna@linaro.org>
Cc: linux-media@vger.kernel.org
Acked-by: Ohad Ben-Cohen <ohad@wizery.com>
Acked-by: Joerg Roedel <joro@8bytes.org>
Signed-off-by: Tony Lindgren <tony@atomide.com>
2012-11-20 10:04:41 -08:00
Tony Lindgren c8d35c84f5 ARM: OMAP2+: Move plat/iovmm.h to include/linux/omap-iommu.h
Looks like the iommu framework does not have generic functions
exported for all the needs yet. The hardware specific functions
are defined in files like intel-iommu.h and amd-iommu.h. Follow
the same standard for omap-iommu.h.

This is needed because we are removing plat and mach includes
for ARM common zImage support. Further work should continue
in the iommu framework context as only pure platform data will
be communicated from arch/arm/*omap*/* code to the iommu
framework.

Cc: Ido Yariv <ido@wizery.com>
Cc: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Cc: Omar Ramirez Luna <omar.luna@linaro.org>
Cc: linux-media@vger.kernel.org
Acked-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Acked-by: Ohad Ben-Cohen <ohad@wizery.com>
Acked-by: Joerg Roedel <joro@8bytes.org>
Signed-off-by: Tony Lindgren <tony@atomide.com>
2012-11-20 10:04:29 -08:00
Ido Yariv 2f7702af64 ARM: OMAP2+: Move iopgtable header to drivers/iommu/
The iopgtable header file is only used by the iommu & iovmm drivers, so
move it to drivers/iommu/, as part of the single zImage effort.

Cc: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Cc: Mauro Carvalho Chehab <mchehab@infradead.org>
Cc: Omar Ramirez Luna <omar.luna@linaro.org>
Signed-off-by: Ido Yariv <ido@wizery.com>
Acked-by: Ohad Ben-Cohen <ohad@wizery.com>
Acked-by: Joerg Roedel <joro@8bytes.org>
[tony@atomide.com: updated to be earlier in the series]
Signed-off-by: Tony Lindgren <tony@atomide.com>
2012-11-20 10:04:17 -08:00
Joerg Roedel 2c6edb0cc4 iommu/omap: Implement DOMAIN_ATTR_GEOMETRY attribute
Implement the attribute for the OMAP IOMMU driver.

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2012-07-11 12:15:45 +02:00
Omar Ramirez Luna 803b527721 iommu: OMAP: device detach on domain destroy
'domain_destroy with devices attached' case isn't yet handled, instead
code assumes that the device was already detached.

If the domain is destroyed the hardware still has access to invalid
pointers to its page table and internal iommu object. In order to
detach the users we need to track devices using the iommu, current
use cases only have one user of iommu per instance. When required
this can evolve to a list with the devices using the iommu_dev.

Reported-by: Joerg Roedel <joro@8bytes.org>
Reviewed-by: Ohad Ben-Cohen <ohad@wizery.com>
Signed-off-by: Omar Ramirez Luna <omar.luna@linaro.org>
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2012-04-19 15:07:23 +02:00
Ohad Ben-Cohen 435792d934 ARM: OMAP: make iommu subsys_initcall to fix builtin omap3isp
omap3isp depends on omap's iommu and will fail to probe if
initialized before it (which always happen if they are builtin).

Make omap's iommu subsys_initcall as an interim solution until
the probe deferral mechanism is merged.

Reported-by: James <angweiyang@gmail.com>
Debugged-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Ohad Ben-Cohen <ohad@wizery.com>
Cc: stable <stable@vger.kernel.org>
Cc: Tony Lindgren <tony@atomide.com>
Cc: Hiroshi Doyu <hdoyu@nvidia.com>
Cc: Joerg Roedel <Joerg.Roedel@amd.com>
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2012-02-27 14:18:42 +01:00
Joerg Roedel 00fb5430f5 Merge branches 'iommu/fixes', 'arm/omap' and 'x86/amd' into next
Conflicts:
	drivers/pci/hotplug/acpiphp_glue.c
2012-01-09 13:04:05 +01:00
Ohad Ben-Cohen 1a36ea815a iommu/omap: be verbose when omap_iommu_iova_to_phys fails
An omap_iommu_iova_to_phys failure usually means that iova wasn't mapped.

When that happens, it's helpful to know the value of iova, so add it
to the error message.

Signed-off-by: Ohad Ben-Cohen <ohad@wizery.com>
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2011-12-06 14:56:08 +01:00
Ohad Ben-Cohen fabdbca8c9 iommu/omap: eliminate the public omap_find_iommu_device() method
Eliminate the public omap_find_iommu_device() method, and don't
expect clients to provide the omap_iommu handle anymore.

Instead, OMAP's iommu driver now utilizes dev_archdata's private iommu
extension to be able to access the required iommu information.

This way OMAP IOMMU users are now able to use the generic IOMMU API without
having to call any omap-specific binding method.

Update omap3isp appropriately.

Signed-off-by: Ohad Ben-Cohen <ohad@wizery.com>
Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Acked-by: Tony Lindgren <tony@atomide.com>
Cc: Hiroshi Doyu <hdoyu@nvidia.com>
2011-12-05 15:47:39 +02:00
Ohad Ben-Cohen 66bc8cf3b1 iommu/omap: announce supported page sizes
Let the IOMMU core know we support 4KiB, 64KiB, 1MiB and 16MiB page sizes.

This way the IOMMU core can split any arbitrary-sized physically
contiguous regions (that it needs to map) as needed.

Signed-off-by: Ohad Ben-Cohen <ohad@wizery.com>
Cc: Hiroshi DOYU <hdoyu@nvidia.com>
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2011-11-10 11:40:37 +01:00
Ohad Ben-Cohen 5009065d38 iommu/core: stop converting bytes to page order back and forth
Express sizes in bytes rather than in page order, to eliminate the
size->order->size conversions we have whenever the IOMMU API is calling
the low level drivers' map/unmap methods.

Adopt all existing drivers.

Signed-off-by: Ohad Ben-Cohen <ohad@wizery.com>
Cc: David Brown <davidb@codeaurora.org>
Cc: David Woodhouse <dwmw2@infradead.org>
Cc: Joerg Roedel <Joerg.Roedel@amd.com>
Cc: Stepan Moskovchenko <stepanm@codeaurora.org>
Cc: KyongHo Cho <pullip.cho@samsung.com>
Cc: Hiroshi DOYU <hdoyu@nvidia.com>
Cc: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2011-11-10 11:40:37 +01:00
Joerg Roedel 1abb4ba596 Merge branches 'amd/fixes', 'debug/dma-api', 'arm/omap', 'arm/msm', 'core', 'iommu/fault-reporting' and 'api/iommu-ops-per-bus' into next
Conflicts:
	drivers/iommu/amd_iommu.c
	drivers/iommu/iommu.c
2011-10-21 14:38:55 +02:00
Joerg Roedel a65bc64f91 iommu/omap: Use bus_set_iommu instead of register_iommu
Convert the OMAP IOMMU driver on ARM to use the new
interface for publishing the iommu_ops.

Cc: Ohad Ben-Cohen <ohad@wizery.com>
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2011-10-21 14:37:22 +02:00
Arnd Bergmann e4efd94bde iommu/omap: always provide iommu debug code
The iommu module on omap contains a few functions that are
only used by the debug module. These are however only there
when the debug code is built as a module. Since it is possible
to build the debug code into the kernel, the functions should
also be provided for the built-in case.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Ohad Ben-Cohen <ohad@wizery.com>
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2011-10-10 12:03:14 +02:00
Ohad Ben-Cohen e7f10f02ef iommu/omap: Migrate to the generic fault report mechanism
Start using the generic fault report mechanism, as provided by
the IOMMU core, and remove its now-redundant omap_iommu_set_isr API.

Currently we're only interested in letting upper layers know about the
fault, so in case the faulting device is a remote processor, they could
restart it.

Dynamic PTE/TLB loading is not supported.

Signed-off-by: Ohad Ben-Cohen <ohad@wizery.com>
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2011-09-14 15:36:35 +02:00
Ohad Ben-Cohen 5e1b612cb1 iommu/omap: ->unmap() should return order of unmapped page
Users of the IOMMU API (kvm specifically) assume that iommu_unmap()
returns the order of the unmapped page.

Fix omap_iommu_unmap() to do so and adopt omap-iovmm accordingly.

Signed-off-by: Ohad Ben-Cohen <ohad@wizery.com>
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2011-09-05 15:14:37 +02:00
Ohad Ben-Cohen b4550d415a iommu/omap: cleanup: remove a redundant statement
Tiny cleanup that removes a redundant 'return' statement.

Signed-off-by: Ohad Ben-Cohen <ohad@wizery.com>
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2011-09-05 15:14:37 +02:00
Joerg Roedel 4234541f1a omap: iommu: Fix up mutex->spin_lock conversion of iommu_lock
The omap_iommu_set_isr() was still using the mutex functions
but the iommu_lock was converted to a spin_lock. Fix that
up.

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2011-08-26 13:22:42 +02:00
Ohad Ben-Cohen 6c32df437c omap: iommu: omapify 'struct iommu' and exposed API
Prepend 'omap_' to OMAP's 'struct iommu' and exposed API, to prevent
namespace pollution and generally to improve readability of the code
that still uses the driver directly.

Update the users as needed as well.

Signed-off-by: Ohad Ben-Cohen <ohad@wizery.com>
Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Acked-by: Hiroshi DOYU <Hiroshi.DOYU@nokia.com>
Acked-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2011-08-26 11:46:01 +02:00
Ohad Ben-Cohen 384fa67579 omap: iommu: remove unused exported API
Remove unused public APIs from OMAP's iommu driver.

IOMMU functionality should be exposed only via the generic IOMMU API;
this way drivers stay generic, and different IOMMU drivers
don't need to duplicate similar functionalities.

The rest of the API still exposed by OMAP's iommu will be evaluated
and eventually either added to the generic IOMMU API (if relevant),
or completely removed.

The intention is that OMAP's iommu driver will eventually not expose
any public API.

Signed-off-by: Ohad Ben-Cohen <ohad@wizery.com>
Acked-by: Hiroshi DOYU <Hiroshi.DOYU@nokia.com>
Acked-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2011-08-26 11:46:01 +02:00
Ohad Ben-Cohen 5da14a4714 omap: iommu: PREFETCH_IOTLB cleanup
Use PREFETCH_IOTLB to control the content of the called function,
instead of inlining it in the code.

This improves readability of the code, and also prevents an "unused
function" warning to show up when PREFETCH_IOTLB isn't set.

Signed-off-by: Ohad Ben-Cohen <ohad@wizery.com>
Acked-by: Hiroshi DOYU <Hiroshi.DOYU@nokia.com>
Acked-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2011-08-26 11:46:00 +02:00
Ohad Ben-Cohen e1f2381332 omap: iommu: stop exporting local functions
Stop exporting functions that are used only within the iommu
driver itself.

Eventually OMAP's iommu driver should only expose API via the generic
IOMMU framework.

Signed-off-by: Ohad Ben-Cohen <ohad@wizery.com>
Acked-by: Hiroshi DOYU <Hiroshi.DOYU@nokia.com>
Acked-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2011-08-26 11:46:00 +02:00
Ohad Ben-Cohen fcf3a6ef4a omap: iommu/iovmm: move to dedicated iommu folder
Move OMAP's iommu drivers to the dedicated iommu drivers folder.

While OMAP's iovmm (virtual memory manager) driver does not strictly
belong to the iommu drivers folder, move it there as well, because
it's by no means OMAP-specific (in concept. technically it is still
coupled with OMAP's iommu).

Eventually, iovmm will be completely replaced with the generic,
iommu-based, dma-mapping API.

Signed-off-by: Ohad Ben-Cohen <ohad@wizery.com>
Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Acked-by: Hiroshi DOYU <Hiroshi.DOYU@nokia.com>
Acked-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2011-08-26 11:46:00 +02:00