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path: root/drivers/gpu/drm/drm_prime.c (follow)
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* drm: Make the prime vmap/vunmap hooks optional.Eric Anholt2018-04-301-2/+6
| | | | | | | | | Some drivers leave these unimplemented, so don't make them have unimplemented stubs. Signed-off-by: Eric Anholt <eric@anholt.net> Link: https://patchwork.freedesktop.org/patch/msgid/20180424004610.4637-2-eric@anholt.net Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
* drm: add parameter explanation for some gem dmabuf_opsSamuel Li2018-03-281-0/+13
| | | | | | | | | To reduce some warnings. Reviewed-by: Alex Deucher <alexander.deucher@amd.com> Signed-off-by: Samuel Li <Samuel.Li@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com> Link: https://patchwork.freedesktop.org/patch/msgid/1522092145-12645-1-git-send-email-Samuel.Li@amd.com
* drm/prime: make the pages array optional for drm_prime_sg_to_page_addr_arraysChristian König2018-03-061-10/+10
| | | | | | | | | | | | | Most of the time we only need the dma addresses. Signed-off-by: Christian König <christian.koenig@amd.com> Reviewed-by: Roger He <Hongbo.He@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com> Link: https://patchwork.freedesktop.org/patch/msgid/20180227115000.4105-2-christian.koenig@amd.com Link: https://patchwork.freedesktop.org/patch/msgid/20180227115000.4105-3-christian.koenig@amd.com Link: https://patchwork.freedesktop.org/patch/msgid/20180227115000.4105-4-christian.koenig@amd.com Link: https://patchwork.freedesktop.org/patch/msgid/20180227115000.4105-5-christian.koenig@amd.com Link: https://patchwork.freedesktop.org/patch/msgid/BN6PR12MB18262C0DE9B5F07B9A42EAE7F2C60@BN6PR12MB1826.namprd12.prod.outlook.com
* drm/prime: fix potential race in drm_gem_map_detachChristian König2018-03-061-16/+16
| | | | | | | | | | Unpin the GEM object only after freeing the sg table. Signed-off-by: Christian König <christian.koenig@amd.com> Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch> Acked-by: Roger He <Hongbo.He@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com> Link: https://patchwork.freedesktop.org/patch/msgid/20180227115000.4105-1-christian.koenig@amd.com
* drm: add kernel doc for exported gem dmabuf_opsSamuel Li2018-01-191-0/+88
| | | | | | | | Signed-off-by: Samuel Li <Samuel.Li@amd.com> Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch> Reviewed-by: Christian König <christian.koenig@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com> Link: https://patchwork.freedesktop.org/patch/msgid/1516311860-24949-1-git-send-email-Samuel.Li@amd.com
* drm: export gem dmabuf_ops for drivers to reuseSamuel Li2018-01-091-22/+31
| | | | | | | Signed-off-by: Samuel Li <Samuel.Li@amd.com> Reviewed-by: Christian König <christian.koenig@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com> Link: https://patchwork.freedesktop.org/patch/msgid/1515100334-6845-1-git-send-email-Samuel.Li@amd.com
* drm/prime: skip CPU sync in map/unmap dma_bufLucas Stach2017-12-041-3/+5
| | | | | | | | | | | | | | | | | | Dma-bufs should already be device coherent, as they are only pulled in the CPU domain via the begin/end cpu_access calls. As we cache the mapping set up by dma_map_sg a CPU sync at this point will not actually guarantee proper coherency on non-coherent architectures, so we can as well stop pretending. This is an important performance fix for architectures which need explicit cache synchronization and userspace doing lots of dma-buf imports. Improves Weston on Etnaviv performance 5x, where before this patch > 90% of Weston CPU time was spent synchronizing caches for buffers which are already device coherent. Signed-off-by: Lucas Stach <l.stach@pengutronix.de> Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch> Link: https://patchwork.freedesktop.org/patch/msgid/20171130173428.8666-1-l.stach@pengutronix.de
* drm/core: clean up references to drm_dev_unref()Aishwarya Pant2017-09-271-1/+1
| | | | | | | | | | This is a continuation of a previous commit ("drm: introduce drm_dev_{get/put} functions") to replace all references to drm_dev_unref() in drm core files with drm_dev_put(). Signed-off-by: Aishwarya Pant <aishpant@gmail.com> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch> Link: https://patchwork.freedesktop.org/patch/msgid/20170926170400.GA7671@aishwarya
* drm: introduce drm_dev_{get/put} functionsAishwarya Pant2017-09-261-1/+1
| | | | | | | | | | | | | | | Reference counting functions in the kernel typically use get/put suffixes. For maintaining coding style consistency, introduce drm_dev_{get/put} functions. All callers of drm_dev_ref() API have been converted in this patch and hence it has been dropped while the drm_dev_unref() API with non-trivial number of users remains for compatibility. The semantic patch scripts/coccinelle/api/drm-get-put.cocci has been updated with the new helper for conversion of drm_dev_unref() to drm_dev_put() Signed-off-by: Aishwarya Pant <aishpant@gmail.com> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch> Link: https://patchwork.freedesktop.org/patch/msgid/6babda56134035a98220d5d37a4fd4048df214ce.1506413698.git.aishpant@gmail.com
* drm/prime: Introduce drm_gem_prime_import_devLaura Abbott2017-05-081-6/+24
| | | | | | | | | | | | The existing drm_gem_prime_import function uses the underlying struct device of a drm_device for attaching to a dma_buf. Some drivers (notably vgem) may not have an underlying device structure. Offer an alternate function to attach using any available device structure. Signed-off-by: Laura Abbott <labbott@redhat.com> Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch> Link: http://patchwork.freedesktop.org/patch/msgid/1493923548-20878-3-git-send-email-labbott@redhat.com
* dma-buf: Rename dma-ops to prevent conflict with kunmap_atomic macroLogan Gunthorpe2017-04-201-4/+4
| | | | | | | | | | | | | | | | | | | | | | | Seeing the kunmap_atomic dma_buf_ops share the same name with a macro in highmem.h, the former can be aliased if any dma-buf user includes that header. I'm personally trying to include highmem.h inside scatterlist.h and this breaks the dma-buf code proper. Christoph Hellwig suggested [1] renaming it and pushing this patch ASAP. To maintain consistency I've renamed all four of kmap* and kunmap* to be map* and unmap*. (Even though only kmap_atomic presently conflicts.) [1] https://www.spinics.net/lists/target-devel/msg15070.html Signed-off-by: Logan Gunthorpe <logang@deltatee.com> Reviewed-by: Sinclair Yeh <syeh@vmware.com> Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch> Acked-by: Sumit Semwal <sumit.semwal@linaro.org> Signed-off-by: Sumit Semwal <sumit.semwal@linaro.org> Link: http://patchwork.freedesktop.org/patch/msgid/1492630570-879-1-git-send-email-logang@deltatee.com
* drm: Extract drm_prime.hDaniel Vetter2017-03-091-1/+2
| | | | | | | | | | | Plus a little bit more documentation. v2: Untangle the missing forward decls to make drm_prime|gem.h free-standing. Reviewed-by: Gustavo Padovan <gustavo.padovan@collabora.com> Signed-off-by: Daniel Vetter <daniel.vetter@intel.com> Link: http://patchwork.freedesktop.org/patch/msgid/20170308141257.12119-3-daniel.vetter@ffwll.ch
* drm: Introduce drm_gem_object_{get,put}()Thierry Reding2017-02-281-5/+5
| | | | | | | | | | | | | | | | | | For consistency with other reference counting APIs in the kernel, add drm_gem_object_get() and drm_gem_object_put(), as well as an unlocked variant of the latter, to reference count GEM buffer objects. Compatibility aliases are added to keep existing code working. To help speed up the transition, all the instances of the old functions in the DRM core are already replaced in this commit. The existing semantic patch for the DRM subsystem-wide conversion is extended to account for these new helpers. Reviewed-by: Sean Paul <seanpaul@chromium.org> Acked-by: Christian König <christian.koenig@amd.com> Signed-off-by: Thierry Reding <treding@nvidia.com> Link: http://patchwork.freedesktop.org/patch/msgid/20170228144643.5668-6-thierry.reding@gmail.com
* drm/prime: Clarify DMA-BUF/GEM Object lifetimeOleksandr Andrushchenko2017-01-271-2/+15
| | | | | | | | | | | | | | | | | | | From the description of the "DMA-BUF/GEM Object references and lifetime overview" it is not clear when exactly dma_buf gets destroyed and memory freed: only driver .release function mentioned which makes confusion on the real buffer's lifetime. Add more description so all the paths are covered. Cc: Rob Clark <robdclark@gmail.com> Cc: Dave Airlie <airlied@linux.ie> Cc: Daniel Vetter <daniel.vetter@ffwll.ch> Signed-off-by: Oleksandr Andrushchenko <oleksandr_andrushchenko@epam.com> [danvet: Minor spelling fixes, and some clarification of the 2nd paragraph.] Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch> Link: http://patchwork.freedesktop.org/patch/msgid/1485500665-27690-1-git-send-email-andr2000@gmail.com
* drm/gem|prime|mm: Use recommened kerneldoc for struct member refsDaniel Vetter2017-01-251-1/+1
| | | | | | | | | | | | | | | | I just learned that &struct_name.member_name works and looks pretty even. It doesn't (yet) link to the member directly though, which would be really good for big structures or vfunc tables (where the per-member kerneldoc tends to be long). Also some minor drive-by polish where it makes sense, I read a lot of docs ... Cc: Jani Nikula <jani.nikula@linux.intel.com> Cc: Chris Wilson <chris@chris-wilson.co.uk> Reviewed-by: Gustavo Padovan <gustavo.padovan@collabora.com> Signed-off-by: Daniel Vetter <daniel.vetter@intel.com> Link: http://patchwork.freedesktop.org/patch/msgid/20170125062657.19270-5-daniel.vetter@ffwll.ch
* drm: Take ownership of the dmabuf->obj when exportingChris Wilson2016-12-081-5/+7
| | | | | | | | | | | | | | Currently the reference for the dmabuf->obj is incremented for the dmabuf in drm_gem_prime_handle_to_fd() (at the high level userspace interface), but is released in drm_gem_dmabuf_release() (the lowlevel handler). Improve the symmetry of the dmabuf->obj ownership by acquiring the reference in drm_gem_dmabuf_export(). This makes it easier to use the prime functions directly. Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> [danvet: Update kerneldoc.] Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch> Link: http://patchwork.freedesktop.org/patch/msgid/20161207214527.22533-1-chris@chris-wilson.co.uk
* drm: Fix up kerneldoc for new drm_gem_dmabuf_export()Chris Wilson2016-10-101-1/+2
| | | | | | | | | | | | | I hit send before completing a make htmldoc, and lo I forgot to fix up the cut'n'paste. Fixes: a4fce9cb782a ("drm/prime: Take a ref on the drm_dev when exporting...") Reported-by: kbuild test robot <fengguang.wu@intel.com> Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> Cc: Daniel Vetter <daniel.vetter@ffwll.ch> Cc: stable@vger.kernel.org Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch> Link: http://patchwork.freedesktop.org/patch/msgid/20161005174056.29869-1-chris@chris-wilson.co.uk
* drm/prime: Take a ref on the drm_dev when exporting a dma_bufChris Wilson2016-10-051-1/+29
| | | | | | | | | | | | | | | | | | | | | | | | | dma_buf may live a long time, longer than the last direct user of the driver. We already hold a reference to the owner module (that prevents the object code from disappearing), but there is no reference to the drm_dev - so the pointers to the driver backend themselves may vanish. v2: Resist temptation to fix the bug in armada_gem.c not setting the correct flags on the exported dma-buf (it should pass the flags through and not be arbitrarily setting O_RDWR). Use a common wrapper for exporting the dmabuf and acquiring the reference to the drm_device. Testcase: igt/vgem_basic/unload Suggested-by: Daniel Vetter <daniel.vetter@ffwll.ch> Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> Cc: Petri Latvala <petri.latvala@intel.com> Cc: Daniel Vetter <daniel.vetter@ffwll.ch> Cc: stable@vger.kernel.org Tested-by: Petri Latvala <petri.latvala@intel.com> Reviewed-by: Christian König <christian.koenig@amd.com> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch> Link: http://patchwork.freedesktop.org/patch/msgid/20161005122145.1507-2-chris@chris-wilson.co.uk
* drm/prime: Pass the right module owner through to dma_buf_export()Chris Wilson2016-10-051-7/+10
| | | | | | | | | | | | | | | | | | | | | | | | dma_buf_export() adds a reference to the owning module to the dmabuf (to prevent the driver from being unloaded whilst a third party still refers to the dmabuf). However, drm_gem_prime_export() was passing its own THIS_MODULE (i.e. drm.ko) rather than the driver. Extract the right owner from the device->fops instead. v2: Use C99 initializers to zero out unset elements of dma_buf_export_info v3: Extract the right module from dev->fops. Testcase: igt/vgem_basic/unload Reported-by: Petri Latvala <petri.latvala@intel.com> Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> Cc: Petri Latvala <petri.latvala@intel.com> Cc: Christian König <christian.koenig@amd.com> Cc: stable@vger.kernel.org Tested-by: Petri Latvala <petri.latvala@intel.com> Reviewed-by: Petri Latvala <petri.latvala@intel.com> Reviewed-by: Christian König <christian.koenig@amd.com> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch> Link: http://patchwork.freedesktop.org/patch/msgid/20161005122145.1507-1-chris@chris-wilson.co.uk
* drm: Convert prime dma-buf <-> handle to rbtreeChris Wilson2016-10-041-11/+74
| | | | | | | | | | | | | | | | | | | | | | | | | | | Currently we use a linear walk to lookup a handle and return a dma-buf, and vice versa. A long overdue TODO task is to convert that to a hashtable. Since the initial implementation of dma-buf/prime, we now have resizeable hashtables we can use (and now a future task is to RCU enable the lookup!). However, this patch opts to use an rbtree instead to provide O(lgN) lookups (and insertion, deletion). rbtrees were chosen over using the RCU backed resizable hashtable to firstly avoid the reallocations (rbtrees can be embedded entirely within the parent struct) and to favour simpler code with predictable worst case behaviour. In simple testing, the difference between using the constant lookup and insertion of the rhashtable and the rbtree was less than 10% of the wall time (igt/benchmarks/prime_lookup) - both are dramatic improvements over the existing linear lists. v2: Favour rbtree over rhashtable Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=94631 Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> Cc: Sean Paul <seanpaul@chromium.org> Cc: David Herrmann <dh.herrmann@gmail.com> Reviewed-by: David Herrmann <dh.herrmann@gmail.com> Reviewed-by: Sean Paul <seanpaul@chromium.org> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch> Link: http://patchwork.freedesktop.org/patch/msgid/20160926204414.23222-1-chris@chris-wilson.co.uk
* drm/prime: fix error path deadlock failRob Clark2016-06-131-4/+6
| | | | | | | | | | | | | There were a couple messed up things about this fail path. (1) it would drop object_name_lock twice (2) drm_gem_handle_delete() (in drm_gem_remove_prime_handles()) needs to grab prime_lock Reported-by: Alex Deucher <alexdeucher@gmail.com> Signed-off-by: Rob Clark <robdclark@gmail.com> Reviewed-by: Alex Deucher <alexander.deucher@amd.com> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch> Link: http://patchwork.freedesktop.org/patch/msgid/1465500559-17873-1-git-send-email-robdclark@gmail.com
* drm: Remove unused drm_device from drm_gem_object_lookup()Chris Wilson2016-05-171-1/+1
| | | | | | | | | | | | | drm_gem_object_lookup() has never required the drm_device for its file local translation of the user handle to the GEM object. Let's remove the unused parameter and save some space. Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> Cc: dri-devel@lists.freedesktop.org Cc: Dave Airlie <airlied@redhat.com> Cc: Daniel Vetter <daniel.vetter@ffwll.ch> [danvet: Fixup kerneldoc too.] Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
* drm: prime: Honour O_RDWR during prime-handle-to-fdDaniel Thompson2016-02-091-7/+3
| | | | | | | | | | | | | | | | | | | | Currently DRM_IOCTL_PRIME_HANDLE_TO_FD rejects all flags except (DRM|O)_CLOEXEC making it difficult (maybe impossible) for userspace to mmap() the resulting dma-buf even when this is supported by the DRM driver. It is trivial to relax the restriction and permit read/write access. This is safe because the flags are seldom touched by drm; mostly they are passed verbatim to dma_buf calls. v3 (Tiago): removed unused flags variable from drm_prime_handle_to_fd_ioctl. Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk> Signed-off-by: Daniel Thompson <daniel.thompson@linaro.org> Signed-off-by: Tiago Vignatti <tiago.vignatti@intel.com> Reviewed-by: Stéphane Marchesin <marcheu@chromium.org> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch> Link: http://patchwork.freedesktop.org/patch/msgid/1450820214-12509-2-git-send-email-tiago.vignatti@intel.com
* drm/doc: Convert to markdownDanilo Cesar Lemes de Paula2015-12-151-10/+6
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | DRM Docbook is now Markdown ready. This means its doc is able to use markdown text on it. * Documentation/DocBook/drm.tmpl: Contains a table duplicated from drivers/gpu/drm/i915/i915_reg.h. This is not needed anymore * drivers/gpu/drm/drm_modeset_lock.c: had a code example that used to look pretty bad on html. Fixed by using proper code markup. * drivers/gpu/drm/drm_prime.c: Remove spaces between lines to make a proper markup list. * drivers/gpu/drm/i915/i915_reg.h: Altought pandoc supports tables, it doesn't support table cell spanning. But we can use fixed-width for those special cases. * include/drm/drm_vma_manager.h: Another code example that should be proper indented with four spaces. v2 (Daniel): Adjust name to gpu.xml due to rename. v3 (Daniel): Split out the actual enabling in the Makefile - this way we can merge the conversion, while just keeping the enabling in a drm-private tree. Signed-off-by: Danilo Cesar Lemes de Paula <danilo.cesar@collabora.co.uk> (v1) Cc: Randy Dunlap <rdunlap@infradead.org> Cc: Daniel Vetter <daniel.vetter@ffwll.ch> Cc: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Cc: Jonathan Corbet <corbet@lwn.net> Cc: Herbert Xu <herbert@gondor.apana.org.au> Cc: Stephan Mueller <smueller@chronox.de> Cc: Michal Marek <mmarek@suse.cz> Cc: linux-kernel@vger.kernel.org Cc: linux-doc@vger.kernel.org Cc: intel-gfx <intel-gfx@lists.freedesktop.org> Cc: dri-devel <dri-devel@lists.freedesktop.org> Acked-by: Dave Airlie <airlied@redhat.com> Signed-off-by: Daniel Vetter <daniel.vetter@intel.com> Link: http://patchwork.freedesktop.org/patch/msgid/1448471279-19748-2-git-send-email-daniel.vetter@ffwll.ch
* drm: prime: Document gem_prime_mmapDaniel Thompson2015-06-191-1/+3
| | | | | | | | gem_prime_map is not currently described in the DRM manual, lets document it. Signed-off-by: Daniel Thompson <daniel.thompson@linaro.org> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
* drm/prime: Allow internal imports without import_sg_tableTomasz Figa2015-05-121-3/+3
| | | | | | | | | | | | | | Currently drm_gem_prime_import() checks if gem_prime_import_sg_table() is implemented in DRM driver ops. However it is not necessary for internal imports (i.e. dma_buf->ops == &drm_gem_prime_dmabuf_ops and obj->dev == dev), which only increment reference count on respective GEM objects. This patch makes the helper check this condition only in case of external imports fo rwhich importing sg table is indeed needed. Signed-off-by: Tomasz Figa <tfiga@chromium.org> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
* dma-buf: cleanup dma_buf_export() to make it easily extensibleSumit Semwal2015-04-211-4/+8
| | | | | | | | | | | | | | | | | At present, dma_buf_export() takes a series of parameters, which makes it difficult to add any new parameters for exporters, if required. Make it simpler by moving all these parameters into a struct, and pass the struct * as parameter to dma_buf_export(). While at it, unite dma_buf_export_named() with dma_buf_export(), and change all callers accordingly. Reviewed-by: Maarten Lankhorst <maarten.lankhorst@canonical.com> Reviewed-by: Daniel Thompson <daniel.thompson@linaro.org> Acked-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com> Acked-by: Dave Airlie <airlied@redhat.com> Signed-off-by: Sumit Semwal <sumit.semwal@linaro.org>
* Merge tag 'drm/fixes/for-3.19-rc1' of ↵Dave Airlie2014-11-151-1/+1
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://people.freedesktop.org/~tagr/linux into drm-next drm: Miscellaneous fixes for v3.19-rc1 This is a small collection of fixes that I've been carrying around for a while now. Many of these have been posted and reviewed or acked. The few that haven't I deemed too trivial to bother. * tag 'drm/fixes/for-3.19-rc1' of git://people.freedesktop.org/~tagr/linux: video/hdmi: Relicense header under MIT license drm/gma500: mdfld: Reuse video/mipi_display.h drm: Make drm_mode_create_tv_properties() signature consistent drm: Implement drm_get_pci_dev() dummy for !PCI drm/prime: Use unsigned type for number of pages drm/gem: Fix typo in kerneldoc drm: Use const data when creating blob properties drm: Use size_t for blob property sizes
| * drm/prime: Use unsigned type for number of pagesThierry Reding2014-11-131-1/+1
| | | | | | | | | | | | | | | | The number of pages can never be negative, so an unsigned type is enough. This also matches the type of the n_pages argument of the sg_alloc_table_from_pages() function. Signed-off-by: Thierry Reding <treding@nvidia.com>
* | gpu:drm: Fix typo in Documentation/DocBook/drm.xmlMasanari Iida2014-10-211-2/+2
|/ | | | | | | | | | This patch fix spelling typos found in drm.xml. It is because the file is generated from comments in source codes, I have to fix the typos within source files. Signed-off-by: Masanari Iida <standby24x7@gmail.com> Acked-by: Randy Dunlap <rdunlap@infradead.org> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
* drm: Pass dma-buf as argument to gem_prime_import_sg_tableMaarten Lankhorst2014-09-301-1/+1
| | | | | | Allows importing dma_reservation_objects from a dma-buf. Signed-off-by: Maarten Lankhorst <maarten.lankhorst@canonical.com>
* drm: Extract <drm/drm_gem.h>Daniel Vetter2014-09-241-0/+2
| | | | | | | | | | | v2: Don't forget git add, noticed by David. Cc: David Herrmann <dh.herrmann@gmail.com> Signed-off-by: Daniel Vetter <daniel.vetter@intel.com> Acked-by: David Herrmann <dh.herrmann@gmail.com> Acked-by: Alex Deucher <alexander.deucher@amd.com> Signed-off-by: Dave Airlie <airlied@redhat.com>
* drm: Move piles of functions from drmP.h to drm_internal.hDaniel Vetter2014-09-121-0/+1
| | | | | | | | | | This way drivers can't grow crazy ideas any more, and it also helps a bit in reviewing EXPORT_SYMBOLS. v2: Even more stuff. Unfortunately we can't move drm_vm_open_locked because exynos does some horrible stuff with it. Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
* dma-buf: use reservation objectsMaarten Lankhorst2014-07-081-1/+7
| | | | | | | | | | | | | This allows reservation objects to be used in dma-buf. it's required for implementing polling support on the fences that belong to a dma-buf. Signed-off-by: Maarten Lankhorst <maarten.lankhorst@canonical.com> Acked-by: Mauro Carvalho Chehab <m.chehab@samsung.com> #drivers/media/v4l2-core/ Acked-by: Thomas Hellstrom <thellstrom@vmware.com> #drivers/gpu/drm/ttm Acked-by: Sumit Semwal <sumit.semwal@linaro.org> Acked-by: Daniel Vetter <daniel@ffwll.ch> Signed-off-by: Vincent Stehlé <vincent.stehle@laposte.net> #drivers/gpu/drm/armada/ Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* Merge branch 'drm-next' of git://people.freedesktop.org/~airlied/linuxLinus Torvalds2014-04-081-21/+89
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Pull drm updates from Dave Airlie: "Highlights: - drm: Generic display port aux features, primary plane support, drm master management fixes, logging cleanups, enforced locking checks (instead of docs), documentation improvements, minor number handling cleanup, pseudofs for shared inodes. - ttm: add ability to allocate from both ends - i915: broadwell features, power domain and runtime pm, per-process address space infrastructure (not enabled) - msm: power management, hdmi audio support - nouveau: ongoing GPU fault recovery, initial maxwell support, random fixes - exynos: refactored driver to clean up a lot of abstraction, DP support moved into drm, LVDS bridge support added, parallel panel support - gma500: SGX MMU support, SGX irq handling, asle irq work fixes - radeon: video engine bringup, ring handling fixes, use dp aux helpers - vmwgfx: add rendernode support" * 'drm-next' of git://people.freedesktop.org/~airlied/linux: (849 commits) DRM: armada: fix corruption while loading cursors drm/dp_helper: don't return EPROTO for defers (v2) drm/bridge: export ptn3460_init function drm/exynos: remove MODULE_DEVICE_TABLE definitions ARM: dts: exynos4412-trats2: enable exynos/fimd node ARM: dts: exynos4210-trats: enable exynos/fimd node ARM: dts: exynos4412-trats2: add panel node ARM: dts: exynos4210-trats: add panel node ARM: dts: exynos4: add MIPI DSI Master node drm/panel: add S6E8AA0 driver ARM: dts: exynos4210-universal_c210: add proper panel node drm/panel: add ld9040 driver panel/ld9040: add DT bindings panel/s6e8aa0: add DT bindings drm/exynos: add DSIM driver exynos/dsim: add DT bindings drm/exynos: disallow fbdev initialization if no device is connected drm/mipi_dsi: create dsi devices only for nodes with reg property drm/mipi_dsi: add flags to DSI messages Skip intel_crt_init for Dell XPS 8700 ...
| * drm/doc: Add PRIME function referencesDaniel Vetter2014-03-131-21/+89
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | For giant hilarity the DocBook reference overview is only generated when in a level 2 section, not in a level 3 section. So we need to move this up a bit as a side-by-side section to the main PRIME documentation. Whatever. To have a complete set of references add the missing kerneldoc for all functions exported to modules with the exception of the file private init/destroy functions - drivers have no business calling those, so let's just drop the EXPORT_SYMBOL instead. Also reflow the function parameters to align correctly and break at 80 chars - my OCD couldn't stand them while writing the kerneldoc ;-) Reviewed-by: Alex Deucher <alexander.deucher@amd.com> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
* | dma-buf: avoid using IS_ERR_OR_NULLColin Cross2014-02-071-1/+1
|/ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | dma_buf_map_attachment and dma_buf_vmap can return NULL or ERR_PTR on a error. This encourages a common buggy pattern in callers: sgt = dma_buf_map_attachment(attach, DMA_BIDIRECTIONAL); if (IS_ERR_OR_NULL(sgt)) return PTR_ERR(sgt); This causes the caller to return 0 on an error. IS_ERR_OR_NULL is almost always a sign of poorly-defined error handling. This patch converts dma_buf_map_attachment to always return ERR_PTR, and fixes the callers that incorrectly handled NULL. There are a few more callers that were not checking for NULL at all, which would have dereferenced a NULL pointer later. There are also a few more callers that correctly handled NULL and ERR_PTR differently, I left those alone but they could also be modified to delete the NULL check. This patch also converts dma_buf_vmap to always return NULL. All the callers to dma_buf_vmap only check for NULL, and would have dereferenced an ERR_PTR and panic'd if one was ever returned. This is not consistent with the rest of the dma buf APIs, but matches the expectations of all of the callers. Signed-off-by: Colin Cross <ccross@android.com> Reviewed-by: Rob Clark <robdclark@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* drm: Remove unused variable in drm_prime_sg_to_page_addr_arrays()Lespiau, Damien2013-10-011-2/+1
| | | | | Signed-off-by: Damien Lespiau <damien.lespiau@intel.com> Signed-off-by: Dave Airlie <airlied@redhat.com>
* drm/prime: double lock typoDan Carpenter2013-08-301-1/+1
| | | | | | | | There is a typo so deadlocks on error instead of unlocking. Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch> Signed-off-by: Dave Airlie <airlied@gmail.com>
* drm/prime: Always add exported buffers to the handle cacheDaniel Vetter2013-08-211-33/+48
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | ... not only when the dma-buf is freshly created. In contrived examples someone else could have exported/imported the dma-buf already and handed us the gem object with a flink name. If such on object gets reexported as a dma_buf we won't have it in the handle cache already, which breaks the guarantee that for dma-buf imports we always hand back an existing handle if there is one. This is exercised by igt/prime_self_import/with_one_bo_two_files Now if we extend the locked sections just a notch more we can also plug th racy buf/handle cache setup in handle_to_fd: If evil userspace races a concurrent gem close against a prime export operation we can end up tearing down the gem handle before the dma buf handle cache is set up. When handle_to_fd gets around to adding the handle to the cache there will be no one left to clean it up, effectily leaking the bo (and the dma-buf, since the handle cache holds a ref on the dma-buf): Thread A Thread B handle_to_fd: lookup gem object from handle creates new dma_buf gem_close on the same handle obj->dma_buf is set, but file priv buf handle cache has no entry obj->handle_count drops to 0 drm_prime_add_buf_handle sets up the handle cache -> We have a dma-buf reference in the handle cache, but since the handle_count of the gem object already dropped to 0 no on will clean it up. When closing the drm device fd we'll hit the WARN_ON in drm_prime_destroy_file_private. The important change is to extend the critical section of the filp->prime.lock to cover the gem handle lookup. This serializes with a concurrent gem handle close. This leak is exercised by igt/prime_self_import/export-vs-gem_close-race Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch> Signed-off-by: Dave Airlie <airlied@redhat.com>
* drm/prime: make drm_prime_lookup_buf_handle staticDaniel Vetter2013-08-211-14/+15
| | | | | | | | ... and move it to the top of the function to avoid a forward declaration. Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch> Signed-off-by: Dave Airlie <airlied@redhat.com>
* drm/prime: proper locking+refcounting for obj->dma_buf linkDaniel Vetter2013-08-211-15/+55
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The export dma-buf cache is semantically similar to an flink name. So semantically it makes sense to treat it the same and remove the name (i.e. the dma_buf pointer) and its references when the last gem handle disappears. Again we need to be careful, but double so: Not just could someone race and export with a gem close ioctl (so we need to recheck obj->handle_count again when assigning the new name), but multiple exports can also race against each another. This is prevented by holding the dev->object_name_lock across the entire section which touches obj->dma_buf. With the new scheme we also need to reinstate the obj->dma_buf link at import time (in case the only reference userspace has held in-between was through the dma-buf fd and not through any native gem handle). For simplicity we don't check whether it's a native object but unconditionally set up that link - with the new scheme of removing the obj->dma_buf reference when the last handle disappears we can do that. To make it clear that this is not just for exported buffers anymore als rename it from export_dma_buf to dma_buf. To make sure that now one can race a fd_to_handle or handle_to_fd with gem_close we use the same tricks as in flink of extending the dev->object_name_locking critical section. With this change we finally have a guaranteed 1:1 relationship (at least for native objects) between gem objects and dma-bufs, even accounting for races (which can happen since the dma-buf itself holds a reference while in-flight). This prevent igt/prime_self_import/export-vs-gem_close-race from Oopsing the kernel. There is still a leak though since the per-file priv dma-buf/handle cache handling is racy. That will be fixed in a later patch. v2: Remove the bogus dma_buf_put from the export_and_register_object failure path if we've raced with the handle count dropping to 0. Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch> Signed-off-by: Dave Airlie <airlied@redhat.com>
* drm/prime: clarify logic a bit in drm_gem_prime_fd_to_handleDaniel Vetter2013-08-211-3/+1
| | | | | | | | | if (!ret) implies that ret == 0, so no need to clear it again. And explicitly check for ret == 0 to indicate that we're checking an errno integer. Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch> Signed-off-by: Dave Airlie <airlied@redhat.com>
* drm/prime: shrink critical section protected by prime lockDaniel Vetter2013-08-211-2/+2
| | | | | | | | | | | | | When exporting a gem object as a dma-buf the critical section for the per-fd prime lock is just the adding (and in case of errors, removing) of the handle to the per-fd lookup cache. So restrict the critical section to just that part of the function. This simplifies later reordering. Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch> Signed-off-by: Dave Airlie <airlied@redhat.com>
* drm/prime: use proper pointer in drm_gem_prime_handle_to_fdDaniel Vetter2013-08-211-8/+8
| | | | | | | | Part of the function uses the properly-typed dmabuf variable, the other an untyped void *buf. Kill the later. Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch> Signed-off-by: Dave Airlie <airlied@redhat.com>
* drm/prime: fix error path in drm_gem_prime_fd_to_handleDaniel Vetter2013-08-211-1/+1
| | | | | | | | | handle_unreference only clears up the obj->name and the reference, but would leave a dangling handle in the idr. The right thing to do is to call handle_delete. Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch> Signed-off-by: Dave Airlie <airlied@redhat.com>
* drm/prime: remove cargo-cult locking from map_sg helperDaniel Vetter2013-08-191-3/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | I've checked both implementations (radeon/nouveau) and they both grab the page array from ttm simply by dereferencing it and then wrapping it up with drm_prime_pages_to_sg in the callback and map it with dma_map_sg (in the helper). Only the grabbing of the underlying page array is anything we need to be concerned about, and either those pages are pinned independently, or we're screwed no matter what. And indeed, nouveau/radeon pin the backing storage in their attach/detach functions. Since I've created this patch cma prime support for dma_buf was added. drm_gem_cma_prime_get_sg_table only calls kzalloc and the creates&maps the sg table with dma_get_sgtable. It doesn't touch any gem object state otherwise. So the cma helpers also look safe. The only thing we might claim it does is prevent concurrent mapping of dma_buf attachments. But a) that's not allowed and b) the current code is racy already since it checks whether the sg mapping exists _before_ grabbing the lock. So the dev->struct_mutex locking here does absolutely nothing useful, but only distracts. Remove it. This should also help Maarten's work to eventually pin the backing storage more dynamically by preventing locking inversions around dev->struct_mutex. v2: Add analysis for recently added cma helper prime code. Cc: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Cc: Maarten Lankhorst <maarten.lankhorst@canonical.com> Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Acked-by: Maarten Lankhorst <maarten.lankhorst@canonical.com> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch> Signed-off-by: Dave Airlie <airlied@redhat.com>
* drm: use common drm_gem_dmabuf_release in i915/exynos driversDaniel Vetter2013-08-191-1/+2
| | | | | | | | | | | | | Note that this is slightly tricky since both drivers store their native objects in dma_buf->priv. But both also embed the base drm_gem_object at the first position, so the implicit cast is ok. To use the release helper we need to export it, too. Cc: Inki Dae <inki.dae@samsung.com> Cc: Intel Graphics Development <intel-gfx@lists.freedesktop.org> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch> Signed-off-by: Dave Airlie <airlied@redhat.com>
* drm: add mmap function to prime helpersJoonyoung Shim2013-07-051-1/+7
| | | | | | | | This adds to call low-level mmap() from prime helpers. Signed-off-by: Joonyoung Shim <jy0922.shim@samsung.com> Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Dave Airlie <airlied@redhat.com>
* drm/prime: fix sgt NULL checkingJoonyoung Shim2013-07-051-5/+6
| | | | | | | The drm_gem_map_detach() can be called with sgt is NULL. Signed-off-by: Joonyoung Shim <jy0922.shim@samsung.com> Signed-off-by: Dave Airlie <airlied@redhat.com>
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