2014-09-10 14:16:10 +08:00
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/*
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* Copyright © 2014 Intel Corporation
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* Daniel Vetter <daniel.vetter@ffwll.ch>
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
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* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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* OTHER DEALINGS IN THE SOFTWARE.
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*/
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drm/vblank: Add vblank works
Add some kind of vblank workers. The interface is similar to regular
delayed works, and is mostly based off kthread_work. It allows for
scheduling delayed works that execute once a particular vblank sequence
has passed. It also allows for accurate flushing of scheduled vblank
works - in that flushing waits for both the vblank sequence and job
execution to complete, or for the work to get cancelled - whichever
comes first.
Whatever hardware programming we do in the work must be fast (must at
least complete during the vblank or scanout period, sometimes during the
first few scanlines of the vblank). As such we use a high-priority
per-CRTC thread to accomplish this.
Changes since v7:
* Stuff drm_vblank_internal.h and drm_vblank_work_internal.h contents
into drm_internal.h
* Get rid of unnecessary spinlock in drm_crtc_vblank_on()
* Remove !vblank->worker check
* Grab vbl_lock in drm_vblank_work_schedule()
* Mention self-rearming work items in drm_vblank_work_schedule() kdocs
* Return 1 from drm_vblank_work_schedule() if the work was scheduled
successfully, 0 or error code otherwise
* Use drm_dbg_core() instead of DRM_DEV_ERROR() in
drm_vblank_work_schedule()
* Remove vblank->worker checks in drm_vblank_destroy_worker() and
drm_vblank_flush_worker()
Changes since v6:
* Get rid of ->pending and seqcounts, and implement flushing through
simpler means - danvet
* Get rid of work_lock, just use drm_device->event_lock
* Move drm_vblank_work item cleanup into drm_crtc_vblank_off() so that
we ensure that all vblank work has finished before disabling vblanks
* Add checks into drm_crtc_vblank_reset() so we yell if it gets called
while there's vblank workers active
* Grab event_lock in both drm_crtc_vblank_on()/drm_crtc_vblank_off(),
the main reason for this is so that other threads calling
drm_vblank_work_schedule() are blocked from attempting to schedule
while we're in the middle of enabling/disabling vblanks.
* Move drm_handle_vblank_works() call below drm_handle_vblank_events()
* Simplify drm_vblank_work_cancel_sync()
* Fix drm_vblank_work_cancel_sync() documentation
* Move wake_up_all() calls out of spinlock where we can. The only one I
left was the call to wake_up_all() in drm_vblank_handle_works() as
this seemed like it made more sense just living in that function
(which is all technically under lock)
* Move drm_vblank_work related functions into their own source files
* Add drm_vblank_internal.h so we can export some functions we don't
want drivers using, but that we do need to use in drm_vblank_work.c
* Add a bunch of documentation
Changes since v4:
* Get rid of kthread interfaces we tried adding and move all of the
locking into drm_vblank.c. For implementing drm_vblank_work_flush(),
we now use a wait_queue and sequence counters in order to
differentiate between multiple work item executions.
* Get rid of drm_vblank_work_cancel() - this would have been pretty
difficult to actually reimplement and it occurred to me that neither
nouveau or i915 are even planning to use this function. Since there's
also no async cancel function for most of the work interfaces in the
kernel, it seems a bit unnecessary anyway.
* Get rid of to_drm_vblank_work() since we now are also able to just
pass the struct drm_vblank_work to work item callbacks anyway
Changes since v3:
* Use our own spinlocks, don't integrate so tightly with kthread_works
Changes since v2:
* Use kthread_workers instead of reinventing the wheel.
Cc: Tejun Heo <tj@kernel.org>
Cc: dri-devel@lists.freedesktop.org
Cc: nouveau@lists.freedesktop.org
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Co-developed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Lyude Paul <lyude@redhat.com>
Acked-by: Dave Airlie <airlied@gmail.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200627194657.156514-4-lyude@redhat.com
2020-04-18 03:33:13 +08:00
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#include <linux/kthread.h>
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2018-09-05 21:57:06 +08:00
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#include <drm/drm_ioctl.h>
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drm/vblank: Add vblank works
Add some kind of vblank workers. The interface is similar to regular
delayed works, and is mostly based off kthread_work. It allows for
scheduling delayed works that execute once a particular vblank sequence
has passed. It also allows for accurate flushing of scheduled vblank
works - in that flushing waits for both the vblank sequence and job
execution to complete, or for the work to get cancelled - whichever
comes first.
Whatever hardware programming we do in the work must be fast (must at
least complete during the vblank or scanout period, sometimes during the
first few scanlines of the vblank). As such we use a high-priority
per-CRTC thread to accomplish this.
Changes since v7:
* Stuff drm_vblank_internal.h and drm_vblank_work_internal.h contents
into drm_internal.h
* Get rid of unnecessary spinlock in drm_crtc_vblank_on()
* Remove !vblank->worker check
* Grab vbl_lock in drm_vblank_work_schedule()
* Mention self-rearming work items in drm_vblank_work_schedule() kdocs
* Return 1 from drm_vblank_work_schedule() if the work was scheduled
successfully, 0 or error code otherwise
* Use drm_dbg_core() instead of DRM_DEV_ERROR() in
drm_vblank_work_schedule()
* Remove vblank->worker checks in drm_vblank_destroy_worker() and
drm_vblank_flush_worker()
Changes since v6:
* Get rid of ->pending and seqcounts, and implement flushing through
simpler means - danvet
* Get rid of work_lock, just use drm_device->event_lock
* Move drm_vblank_work item cleanup into drm_crtc_vblank_off() so that
we ensure that all vblank work has finished before disabling vblanks
* Add checks into drm_crtc_vblank_reset() so we yell if it gets called
while there's vblank workers active
* Grab event_lock in both drm_crtc_vblank_on()/drm_crtc_vblank_off(),
the main reason for this is so that other threads calling
drm_vblank_work_schedule() are blocked from attempting to schedule
while we're in the middle of enabling/disabling vblanks.
* Move drm_handle_vblank_works() call below drm_handle_vblank_events()
* Simplify drm_vblank_work_cancel_sync()
* Fix drm_vblank_work_cancel_sync() documentation
* Move wake_up_all() calls out of spinlock where we can. The only one I
left was the call to wake_up_all() in drm_vblank_handle_works() as
this seemed like it made more sense just living in that function
(which is all technically under lock)
* Move drm_vblank_work related functions into their own source files
* Add drm_vblank_internal.h so we can export some functions we don't
want drivers using, but that we do need to use in drm_vblank_work.c
* Add a bunch of documentation
Changes since v4:
* Get rid of kthread interfaces we tried adding and move all of the
locking into drm_vblank.c. For implementing drm_vblank_work_flush(),
we now use a wait_queue and sequence counters in order to
differentiate between multiple work item executions.
* Get rid of drm_vblank_work_cancel() - this would have been pretty
difficult to actually reimplement and it occurred to me that neither
nouveau or i915 are even planning to use this function. Since there's
also no async cancel function for most of the work interfaces in the
kernel, it seems a bit unnecessary anyway.
* Get rid of to_drm_vblank_work() since we now are also able to just
pass the struct drm_vblank_work to work item callbacks anyway
Changes since v3:
* Use our own spinlocks, don't integrate so tightly with kthread_works
Changes since v2:
* Use kthread_workers instead of reinventing the wheel.
Cc: Tejun Heo <tj@kernel.org>
Cc: dri-devel@lists.freedesktop.org
Cc: nouveau@lists.freedesktop.org
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Co-developed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Lyude Paul <lyude@redhat.com>
Acked-by: Dave Airlie <airlied@gmail.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200627194657.156514-4-lyude@redhat.com
2020-04-18 03:33:13 +08:00
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#include <drm/drm_vblank.h>
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2018-09-05 21:57:06 +08:00
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drm: drop obsolete drm_core.h
The drm_core.h header contains a set of constants meant to be used
throughout DRM. However, as it turns out, they're each used just once and
don't bring any benefit. They're also grossly mis-named and lack
name-spacing. This patch inlines them, or moves them into drm_internal.h
as appropriate:
- CORE_AUTHOR and CORE_DESC are inlined into corresponding MODULE_*()
macros. It's just confusing having to follow 2 pointers when trying to
find the definition of these fields. Grep'ping for MODULE_AUTHOR()
should reveal the full information, if there's no strong reason not to.
- CORE_NAME, CORE_DATE, CORE_MAJOR, CORE_MINOR, and CORE_PATCHLEVEL are
inlined into the sysfs 'version' attribute. They're stripped
everywhere else (which is just some printk() statements). CORE_NAME
just doesn't make *any* sense, as we hard-code it in many places,
anyway. The other constants are outdated and just serve
binary-compatibility purposes. Hence, inline them in 'version' sysfs
attribute (we might even try dropping it..).
- DRM_IF_MAJOR and DRM_IF_MINOR are moved into drm_internal.h as they're
only used by the global ioctl handlers. Furthermore, versioning
interfaces breaks backports and as such is deprecated, anyway. We just
keep them for historic reasons. I doubt anyone will ever modify them
again.
Signed-off-by: David Herrmann <dh.herrmann@gmail.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/20160901124837.680-6-dh.herrmann@gmail.com
2016-09-01 20:48:36 +08:00
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#define DRM_IF_MAJOR 1
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#define DRM_IF_MINOR 4
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2018-12-27 05:03:47 +08:00
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#define DRM_IF_VERSION(maj, min) (maj << 16 | min)
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2019-05-27 01:35:32 +08:00
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struct dentry;
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2018-09-05 21:57:06 +08:00
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struct dma_buf;
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2020-11-03 17:30:12 +08:00
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struct dma_buf_map;
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2019-05-27 01:35:32 +08:00
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struct drm_connector;
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struct drm_crtc;
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struct drm_framebuffer;
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struct drm_gem_object;
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struct drm_master;
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struct drm_minor;
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struct drm_prime_file_private;
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struct drm_printer;
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drm/vblank: Add vblank works
Add some kind of vblank workers. The interface is similar to regular
delayed works, and is mostly based off kthread_work. It allows for
scheduling delayed works that execute once a particular vblank sequence
has passed. It also allows for accurate flushing of scheduled vblank
works - in that flushing waits for both the vblank sequence and job
execution to complete, or for the work to get cancelled - whichever
comes first.
Whatever hardware programming we do in the work must be fast (must at
least complete during the vblank or scanout period, sometimes during the
first few scanlines of the vblank). As such we use a high-priority
per-CRTC thread to accomplish this.
Changes since v7:
* Stuff drm_vblank_internal.h and drm_vblank_work_internal.h contents
into drm_internal.h
* Get rid of unnecessary spinlock in drm_crtc_vblank_on()
* Remove !vblank->worker check
* Grab vbl_lock in drm_vblank_work_schedule()
* Mention self-rearming work items in drm_vblank_work_schedule() kdocs
* Return 1 from drm_vblank_work_schedule() if the work was scheduled
successfully, 0 or error code otherwise
* Use drm_dbg_core() instead of DRM_DEV_ERROR() in
drm_vblank_work_schedule()
* Remove vblank->worker checks in drm_vblank_destroy_worker() and
drm_vblank_flush_worker()
Changes since v6:
* Get rid of ->pending and seqcounts, and implement flushing through
simpler means - danvet
* Get rid of work_lock, just use drm_device->event_lock
* Move drm_vblank_work item cleanup into drm_crtc_vblank_off() so that
we ensure that all vblank work has finished before disabling vblanks
* Add checks into drm_crtc_vblank_reset() so we yell if it gets called
while there's vblank workers active
* Grab event_lock in both drm_crtc_vblank_on()/drm_crtc_vblank_off(),
the main reason for this is so that other threads calling
drm_vblank_work_schedule() are blocked from attempting to schedule
while we're in the middle of enabling/disabling vblanks.
* Move drm_handle_vblank_works() call below drm_handle_vblank_events()
* Simplify drm_vblank_work_cancel_sync()
* Fix drm_vblank_work_cancel_sync() documentation
* Move wake_up_all() calls out of spinlock where we can. The only one I
left was the call to wake_up_all() in drm_vblank_handle_works() as
this seemed like it made more sense just living in that function
(which is all technically under lock)
* Move drm_vblank_work related functions into their own source files
* Add drm_vblank_internal.h so we can export some functions we don't
want drivers using, but that we do need to use in drm_vblank_work.c
* Add a bunch of documentation
Changes since v4:
* Get rid of kthread interfaces we tried adding and move all of the
locking into drm_vblank.c. For implementing drm_vblank_work_flush(),
we now use a wait_queue and sequence counters in order to
differentiate between multiple work item executions.
* Get rid of drm_vblank_work_cancel() - this would have been pretty
difficult to actually reimplement and it occurred to me that neither
nouveau or i915 are even planning to use this function. Since there's
also no async cancel function for most of the work interfaces in the
kernel, it seems a bit unnecessary anyway.
* Get rid of to_drm_vblank_work() since we now are also able to just
pass the struct drm_vblank_work to work item callbacks anyway
Changes since v3:
* Use our own spinlocks, don't integrate so tightly with kthread_works
Changes since v2:
* Use kthread_workers instead of reinventing the wheel.
Cc: Tejun Heo <tj@kernel.org>
Cc: dri-devel@lists.freedesktop.org
Cc: nouveau@lists.freedesktop.org
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Co-developed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Lyude Paul <lyude@redhat.com>
Acked-by: Dave Airlie <airlied@gmail.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200627194657.156514-4-lyude@redhat.com
2020-04-18 03:33:13 +08:00
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struct drm_vblank_crtc;
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2018-09-05 21:57:06 +08:00
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2017-03-08 22:12:40 +08:00
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/* drm_file.c */
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2014-09-10 18:43:54 +08:00
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extern struct mutex drm_global_mutex;
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2020-02-04 23:01:46 +08:00
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bool drm_dev_needs_global_mutex(struct drm_device *dev);
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2018-06-18 22:17:28 +08:00
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struct drm_file *drm_file_alloc(struct drm_minor *minor);
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void drm_file_free(struct drm_file *file);
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2016-04-27 01:29:35 +08:00
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void drm_lastclose(struct drm_device *dev);
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2014-09-10 18:43:53 +08:00
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2019-12-03 18:03:55 +08:00
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#ifdef CONFIG_PCI
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2014-09-10 18:43:53 +08:00
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/* drm_pci.c */
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2020-10-08 22:29:27 +08:00
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int drm_legacy_irq_by_busid(struct drm_device *dev, void *data,
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struct drm_file *file_priv);
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2017-01-25 14:26:52 +08:00
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void drm_pci_agp_destroy(struct drm_device *dev);
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2017-05-24 22:51:39 +08:00
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int drm_pci_set_busid(struct drm_device *dev, struct drm_master *master);
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2014-09-10 18:43:53 +08:00
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2019-12-03 18:03:55 +08:00
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#else
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2020-10-08 22:29:27 +08:00
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static inline int drm_legacy_irq_by_busid(struct drm_device *dev, void *data,
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struct drm_file *file_priv)
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2019-12-03 18:03:55 +08:00
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{
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return -EINVAL;
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}
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static inline void drm_pci_agp_destroy(struct drm_device *dev)
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{
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}
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static inline int drm_pci_set_busid(struct drm_device *dev,
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struct drm_master *master)
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{
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return -EINVAL;
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}
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#endif
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2014-09-10 18:43:53 +08:00
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/* drm_prime.c */
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int drm_prime_handle_to_fd_ioctl(struct drm_device *dev, void *data,
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struct drm_file *file_priv);
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int drm_prime_fd_to_handle_ioctl(struct drm_device *dev, void *data,
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struct drm_file *file_priv);
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void drm_prime_init_file_private(struct drm_prime_file_private *prime_fpriv);
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void drm_prime_destroy_file_private(struct drm_prime_file_private *prime_fpriv);
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void drm_prime_remove_buf_handle_locked(struct drm_prime_file_private *prime_fpriv,
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struct dma_buf *dma_buf);
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2016-11-14 19:58:19 +08:00
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/* drm_drv.c */
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struct drm_minor *drm_minor_acquire(unsigned int minor_id);
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void drm_minor_release(struct drm_minor *minor);
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drm: add managed resources tied to drm_device
We have lots of these. And the cleanup code tends to be of dubious
quality. The biggest wrong pattern is that developers use devm_, which
ties the release action to the underlying struct device, whereas
all the userspace visible stuff attached to a drm_device can long
outlive that one (e.g. after a hotunplug while userspace has open
files and mmap'ed buffers). Give people what they want, but with more
correctness.
Mostly copied from devres.c, with types adjusted to fit drm_device and
a few simplifications - I didn't (yet) copy over everything. Since
the types don't match code sharing looked like a hopeless endeavour.
For now it's only super simplified, no groups, you can't remove
actions (but kfree exists, we'll need that soon). Plus all specific to
drm_device ofc, including the logging. Which I didn't bother to make
compile-time optional, since none of the other drm logging is compile
time optional either.
One tricky bit here is the chicken&egg between allocating your
drm_device structure and initiliazing it with drm_dev_init. For
perfect onion unwinding we'd need to have the action to kfree the
allocation registered before drm_dev_init registers any of its own
release handlers. But drm_dev_init doesn't know where exactly the
drm_device is emebedded into the overall structure, and by the time it
returns it'll all be too late. And forcing drivers to be able clean up
everything except the one kzalloc is silly.
Work around this by having a very special final_kfree pointer. This
also avoids troubles with the list head possibly disappearing from
underneath us when we release all resources attached to the
drm_device.
v2: Do all the kerneldoc at the end, to avoid lots of fairly pointless
shuffling while getting everything into shape.
v3: Add static to add/del_dr (Neil)
Move typo fix to the right patch (Neil)
v4: Enforce contract for drmm_add_final_kfree:
Use ksize() to check that the drm_device is indeed contained somewhere
in the final kfree(). Because we need that or the entire managed
release logic blows up in a pile of use-after-frees. Motivated by a
discussion with Laurent.
v5: Review from Laurent:
- %zu instead of casting size_t
- header guards
- sorting of includes
- guarding of data assignment if we didn't allocate it for a NULL
pointer
- delete spurious newline
- cast void* data parameter correctly in ->release call, no idea how
this even worked before
v6: Review from Sam
- Add the kerneldoc for the managed sub-struct back in, even if it
doesn't show up in the generated html somehow.
- Explain why __always_inline.
- Fix bisectability around the final kfree() in drm_dev_relase(). This
is just interim code which will disappear again.
- Some whitespace polish.
- Add debug output when drmm_add_action or drmm_kmalloc fail.
v7: My bisectability fix wasn't up to par as noticed by smatch.
v8: Remove unecessary {} around if else
v9: Use kstrdup_const, which requires kfree_const and introducing a free_dr()
helper (Thomas).
v10: kfree_const goes boom on the plain "kmalloc" assignment, somehow
we need to wrap that in kstrdup_const() too!! Also renumber revision
log, I somehow reset it midway thruh.
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
Cc: Thomas Zimmermann <tzimmermann@suse.de>
Cc: Dan Carpenter <dan.carpenter@oracle.com>
Cc: Sam Ravnborg <sam@ravnborg.org>
Cc: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Cc: Neil Armstrong <narmstrong@baylibre.com
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: "Rafael J. Wysocki" <rafael@kernel.org>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200324124540.3227396-1-daniel.vetter@ffwll.ch
2020-03-24 20:45:40 +08:00
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/* drm_managed.c */
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void drm_managed_release(struct drm_device *dev);
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2020-09-18 21:25:05 +08:00
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void drmm_add_final_kfree(struct drm_device *dev, void *container);
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drm: add managed resources tied to drm_device
We have lots of these. And the cleanup code tends to be of dubious
quality. The biggest wrong pattern is that developers use devm_, which
ties the release action to the underlying struct device, whereas
all the userspace visible stuff attached to a drm_device can long
outlive that one (e.g. after a hotunplug while userspace has open
files and mmap'ed buffers). Give people what they want, but with more
correctness.
Mostly copied from devres.c, with types adjusted to fit drm_device and
a few simplifications - I didn't (yet) copy over everything. Since
the types don't match code sharing looked like a hopeless endeavour.
For now it's only super simplified, no groups, you can't remove
actions (but kfree exists, we'll need that soon). Plus all specific to
drm_device ofc, including the logging. Which I didn't bother to make
compile-time optional, since none of the other drm logging is compile
time optional either.
One tricky bit here is the chicken&egg between allocating your
drm_device structure and initiliazing it with drm_dev_init. For
perfect onion unwinding we'd need to have the action to kfree the
allocation registered before drm_dev_init registers any of its own
release handlers. But drm_dev_init doesn't know where exactly the
drm_device is emebedded into the overall structure, and by the time it
returns it'll all be too late. And forcing drivers to be able clean up
everything except the one kzalloc is silly.
Work around this by having a very special final_kfree pointer. This
also avoids troubles with the list head possibly disappearing from
underneath us when we release all resources attached to the
drm_device.
v2: Do all the kerneldoc at the end, to avoid lots of fairly pointless
shuffling while getting everything into shape.
v3: Add static to add/del_dr (Neil)
Move typo fix to the right patch (Neil)
v4: Enforce contract for drmm_add_final_kfree:
Use ksize() to check that the drm_device is indeed contained somewhere
in the final kfree(). Because we need that or the entire managed
release logic blows up in a pile of use-after-frees. Motivated by a
discussion with Laurent.
v5: Review from Laurent:
- %zu instead of casting size_t
- header guards
- sorting of includes
- guarding of data assignment if we didn't allocate it for a NULL
pointer
- delete spurious newline
- cast void* data parameter correctly in ->release call, no idea how
this even worked before
v6: Review from Sam
- Add the kerneldoc for the managed sub-struct back in, even if it
doesn't show up in the generated html somehow.
- Explain why __always_inline.
- Fix bisectability around the final kfree() in drm_dev_relase(). This
is just interim code which will disappear again.
- Some whitespace polish.
- Add debug output when drmm_add_action or drmm_kmalloc fail.
v7: My bisectability fix wasn't up to par as noticed by smatch.
v8: Remove unecessary {} around if else
v9: Use kstrdup_const, which requires kfree_const and introducing a free_dr()
helper (Thomas).
v10: kfree_const goes boom on the plain "kmalloc" assignment, somehow
we need to wrap that in kstrdup_const() too!! Also renumber revision
log, I somehow reset it midway thruh.
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
Cc: Thomas Zimmermann <tzimmermann@suse.de>
Cc: Dan Carpenter <dan.carpenter@oracle.com>
Cc: Sam Ravnborg <sam@ravnborg.org>
Cc: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Cc: Neil Armstrong <narmstrong@baylibre.com
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: "Rafael J. Wysocki" <rafael@kernel.org>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200324124540.3227396-1-daniel.vetter@ffwll.ch
2020-03-24 20:45:40 +08:00
|
|
|
|
2017-05-31 17:21:46 +08:00
|
|
|
/* drm_vblank.c */
|
drm/vblank: Add vblank works
Add some kind of vblank workers. The interface is similar to regular
delayed works, and is mostly based off kthread_work. It allows for
scheduling delayed works that execute once a particular vblank sequence
has passed. It also allows for accurate flushing of scheduled vblank
works - in that flushing waits for both the vblank sequence and job
execution to complete, or for the work to get cancelled - whichever
comes first.
Whatever hardware programming we do in the work must be fast (must at
least complete during the vblank or scanout period, sometimes during the
first few scanlines of the vblank). As such we use a high-priority
per-CRTC thread to accomplish this.
Changes since v7:
* Stuff drm_vblank_internal.h and drm_vblank_work_internal.h contents
into drm_internal.h
* Get rid of unnecessary spinlock in drm_crtc_vblank_on()
* Remove !vblank->worker check
* Grab vbl_lock in drm_vblank_work_schedule()
* Mention self-rearming work items in drm_vblank_work_schedule() kdocs
* Return 1 from drm_vblank_work_schedule() if the work was scheduled
successfully, 0 or error code otherwise
* Use drm_dbg_core() instead of DRM_DEV_ERROR() in
drm_vblank_work_schedule()
* Remove vblank->worker checks in drm_vblank_destroy_worker() and
drm_vblank_flush_worker()
Changes since v6:
* Get rid of ->pending and seqcounts, and implement flushing through
simpler means - danvet
* Get rid of work_lock, just use drm_device->event_lock
* Move drm_vblank_work item cleanup into drm_crtc_vblank_off() so that
we ensure that all vblank work has finished before disabling vblanks
* Add checks into drm_crtc_vblank_reset() so we yell if it gets called
while there's vblank workers active
* Grab event_lock in both drm_crtc_vblank_on()/drm_crtc_vblank_off(),
the main reason for this is so that other threads calling
drm_vblank_work_schedule() are blocked from attempting to schedule
while we're in the middle of enabling/disabling vblanks.
* Move drm_handle_vblank_works() call below drm_handle_vblank_events()
* Simplify drm_vblank_work_cancel_sync()
* Fix drm_vblank_work_cancel_sync() documentation
* Move wake_up_all() calls out of spinlock where we can. The only one I
left was the call to wake_up_all() in drm_vblank_handle_works() as
this seemed like it made more sense just living in that function
(which is all technically under lock)
* Move drm_vblank_work related functions into their own source files
* Add drm_vblank_internal.h so we can export some functions we don't
want drivers using, but that we do need to use in drm_vblank_work.c
* Add a bunch of documentation
Changes since v4:
* Get rid of kthread interfaces we tried adding and move all of the
locking into drm_vblank.c. For implementing drm_vblank_work_flush(),
we now use a wait_queue and sequence counters in order to
differentiate between multiple work item executions.
* Get rid of drm_vblank_work_cancel() - this would have been pretty
difficult to actually reimplement and it occurred to me that neither
nouveau or i915 are even planning to use this function. Since there's
also no async cancel function for most of the work interfaces in the
kernel, it seems a bit unnecessary anyway.
* Get rid of to_drm_vblank_work() since we now are also able to just
pass the struct drm_vblank_work to work item callbacks anyway
Changes since v3:
* Use our own spinlocks, don't integrate so tightly with kthread_works
Changes since v2:
* Use kthread_workers instead of reinventing the wheel.
Cc: Tejun Heo <tj@kernel.org>
Cc: dri-devel@lists.freedesktop.org
Cc: nouveau@lists.freedesktop.org
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Co-developed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Lyude Paul <lyude@redhat.com>
Acked-by: Dave Airlie <airlied@gmail.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200627194657.156514-4-lyude@redhat.com
2020-04-18 03:33:13 +08:00
|
|
|
static inline bool drm_vblank_passed(u64 seq, u64 ref)
|
|
|
|
|
{
|
|
|
|
|
return (seq - ref) <= (1 << 23);
|
|
|
|
|
}
|
|
|
|
|
|
2017-05-31 17:21:46 +08:00
|
|
|
void drm_vblank_disable_and_save(struct drm_device *dev, unsigned int pipe);
|
drm/vblank: Add vblank works
Add some kind of vblank workers. The interface is similar to regular
delayed works, and is mostly based off kthread_work. It allows for
scheduling delayed works that execute once a particular vblank sequence
has passed. It also allows for accurate flushing of scheduled vblank
works - in that flushing waits for both the vblank sequence and job
execution to complete, or for the work to get cancelled - whichever
comes first.
Whatever hardware programming we do in the work must be fast (must at
least complete during the vblank or scanout period, sometimes during the
first few scanlines of the vblank). As such we use a high-priority
per-CRTC thread to accomplish this.
Changes since v7:
* Stuff drm_vblank_internal.h and drm_vblank_work_internal.h contents
into drm_internal.h
* Get rid of unnecessary spinlock in drm_crtc_vblank_on()
* Remove !vblank->worker check
* Grab vbl_lock in drm_vblank_work_schedule()
* Mention self-rearming work items in drm_vblank_work_schedule() kdocs
* Return 1 from drm_vblank_work_schedule() if the work was scheduled
successfully, 0 or error code otherwise
* Use drm_dbg_core() instead of DRM_DEV_ERROR() in
drm_vblank_work_schedule()
* Remove vblank->worker checks in drm_vblank_destroy_worker() and
drm_vblank_flush_worker()
Changes since v6:
* Get rid of ->pending and seqcounts, and implement flushing through
simpler means - danvet
* Get rid of work_lock, just use drm_device->event_lock
* Move drm_vblank_work item cleanup into drm_crtc_vblank_off() so that
we ensure that all vblank work has finished before disabling vblanks
* Add checks into drm_crtc_vblank_reset() so we yell if it gets called
while there's vblank workers active
* Grab event_lock in both drm_crtc_vblank_on()/drm_crtc_vblank_off(),
the main reason for this is so that other threads calling
drm_vblank_work_schedule() are blocked from attempting to schedule
while we're in the middle of enabling/disabling vblanks.
* Move drm_handle_vblank_works() call below drm_handle_vblank_events()
* Simplify drm_vblank_work_cancel_sync()
* Fix drm_vblank_work_cancel_sync() documentation
* Move wake_up_all() calls out of spinlock where we can. The only one I
left was the call to wake_up_all() in drm_vblank_handle_works() as
this seemed like it made more sense just living in that function
(which is all technically under lock)
* Move drm_vblank_work related functions into their own source files
* Add drm_vblank_internal.h so we can export some functions we don't
want drivers using, but that we do need to use in drm_vblank_work.c
* Add a bunch of documentation
Changes since v4:
* Get rid of kthread interfaces we tried adding and move all of the
locking into drm_vblank.c. For implementing drm_vblank_work_flush(),
we now use a wait_queue and sequence counters in order to
differentiate between multiple work item executions.
* Get rid of drm_vblank_work_cancel() - this would have been pretty
difficult to actually reimplement and it occurred to me that neither
nouveau or i915 are even planning to use this function. Since there's
also no async cancel function for most of the work interfaces in the
kernel, it seems a bit unnecessary anyway.
* Get rid of to_drm_vblank_work() since we now are also able to just
pass the struct drm_vblank_work to work item callbacks anyway
Changes since v3:
* Use our own spinlocks, don't integrate so tightly with kthread_works
Changes since v2:
* Use kthread_workers instead of reinventing the wheel.
Cc: Tejun Heo <tj@kernel.org>
Cc: dri-devel@lists.freedesktop.org
Cc: nouveau@lists.freedesktop.org
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Co-developed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Lyude Paul <lyude@redhat.com>
Acked-by: Dave Airlie <airlied@gmail.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200627194657.156514-4-lyude@redhat.com
2020-04-18 03:33:13 +08:00
|
|
|
int drm_vblank_get(struct drm_device *dev, unsigned int pipe);
|
|
|
|
|
void drm_vblank_put(struct drm_device *dev, unsigned int pipe);
|
|
|
|
|
u64 drm_vblank_count(struct drm_device *dev, unsigned int pipe);
|
|
|
|
|
|
|
|
|
|
/* drm_vblank_work.c */
|
|
|
|
|
static inline void drm_vblank_flush_worker(struct drm_vblank_crtc *vblank)
|
|
|
|
|
{
|
|
|
|
|
kthread_flush_worker(vblank->worker);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static inline void drm_vblank_destroy_worker(struct drm_vblank_crtc *vblank)
|
|
|
|
|
{
|
|
|
|
|
kthread_destroy_worker(vblank->worker);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
int drm_vblank_worker_init(struct drm_vblank_crtc *vblank);
|
|
|
|
|
void drm_vblank_cancel_pending_works(struct drm_vblank_crtc *vblank);
|
|
|
|
|
void drm_handle_vblank_works(struct drm_vblank_crtc *vblank);
|
2016-11-14 17:02:55 +08:00
|
|
|
|
|
|
|
|
/* IOCTLS */
|
2017-05-24 22:51:46 +08:00
|
|
|
int drm_wait_vblank_ioctl(struct drm_device *dev, void *data,
|
|
|
|
|
struct drm_file *filp);
|
|
|
|
|
int drm_legacy_modeset_ctl_ioctl(struct drm_device *dev, void *data,
|
|
|
|
|
struct drm_file *file_priv);
|
|
|
|
|
|
|
|
|
|
/* drm_irq.c */
|
|
|
|
|
|
|
|
|
|
/* IOCTLS */
|
2019-04-18 15:10:40 +08:00
|
|
|
#if IS_ENABLED(CONFIG_DRM_LEGACY)
|
2016-12-14 07:08:02 +08:00
|
|
|
int drm_legacy_irq_control(struct drm_device *dev, void *data,
|
|
|
|
|
struct drm_file *file_priv);
|
2019-04-18 15:10:40 +08:00
|
|
|
#endif
|
2014-09-10 18:43:53 +08:00
|
|
|
|
2017-06-30 13:49:31 +08:00
|
|
|
int drm_crtc_get_sequence_ioctl(struct drm_device *dev, void *data,
|
|
|
|
|
struct drm_file *filp);
|
|
|
|
|
|
|
|
|
|
int drm_crtc_queue_sequence_ioctl(struct drm_device *dev, void *data,
|
|
|
|
|
struct drm_file *filp);
|
|
|
|
|
|
2014-09-10 18:43:53 +08:00
|
|
|
/* drm_auth.c */
|
|
|
|
|
int drm_getmagic(struct drm_device *dev, void *data,
|
|
|
|
|
struct drm_file *file_priv);
|
|
|
|
|
int drm_authmagic(struct drm_device *dev, void *data,
|
|
|
|
|
struct drm_file *file_priv);
|
2016-06-15 02:50:59 +08:00
|
|
|
int drm_setmaster_ioctl(struct drm_device *dev, void *data,
|
|
|
|
|
struct drm_file *file_priv);
|
|
|
|
|
int drm_dropmaster_ioctl(struct drm_device *dev, void *data,
|
|
|
|
|
struct drm_file *file_priv);
|
2016-06-15 02:51:00 +08:00
|
|
|
int drm_master_open(struct drm_file *file_priv);
|
2016-06-15 02:51:01 +08:00
|
|
|
void drm_master_release(struct drm_file *file_priv);
|
2019-05-07 02:01:30 +08:00
|
|
|
bool drm_master_internal_acquire(struct drm_device *dev);
|
|
|
|
|
void drm_master_internal_release(struct drm_device *dev);
|
2014-09-10 18:43:53 +08:00
|
|
|
|
|
|
|
|
/* drm_sysfs.c */
|
2014-09-10 18:43:59 +08:00
|
|
|
extern struct class *drm_class;
|
|
|
|
|
|
2015-09-09 20:21:30 +08:00
|
|
|
int drm_sysfs_init(void);
|
2014-09-10 18:43:53 +08:00
|
|
|
void drm_sysfs_destroy(void);
|
|
|
|
|
struct device *drm_sysfs_minor_alloc(struct drm_minor *minor);
|
|
|
|
|
int drm_sysfs_connector_add(struct drm_connector *connector);
|
|
|
|
|
void drm_sysfs_connector_remove(struct drm_connector *connector);
|
|
|
|
|
|
2018-11-29 17:42:26 +08:00
|
|
|
void drm_sysfs_lease_event(struct drm_device *dev);
|
|
|
|
|
|
2014-09-10 18:43:53 +08:00
|
|
|
/* drm_gem.c */
|
|
|
|
|
int drm_gem_init(struct drm_device *dev);
|
|
|
|
|
int drm_gem_handle_create_tail(struct drm_file *file_priv,
|
|
|
|
|
struct drm_gem_object *obj,
|
|
|
|
|
u32 *handlep);
|
|
|
|
|
int drm_gem_close_ioctl(struct drm_device *dev, void *data,
|
|
|
|
|
struct drm_file *file_priv);
|
|
|
|
|
int drm_gem_flink_ioctl(struct drm_device *dev, void *data,
|
|
|
|
|
struct drm_file *file_priv);
|
|
|
|
|
int drm_gem_open_ioctl(struct drm_device *dev, void *data,
|
|
|
|
|
struct drm_file *file_priv);
|
|
|
|
|
void drm_gem_open(struct drm_device *dev, struct drm_file *file_private);
|
|
|
|
|
void drm_gem_release(struct drm_device *dev, struct drm_file *file_private);
|
2017-11-08 03:13:40 +08:00
|
|
|
void drm_gem_print_info(struct drm_printer *p, unsigned int indent,
|
|
|
|
|
const struct drm_gem_object *obj);
|
2014-09-23 21:46:51 +08:00
|
|
|
|
2019-06-15 04:35:18 +08:00
|
|
|
int drm_gem_pin(struct drm_gem_object *obj);
|
|
|
|
|
void drm_gem_unpin(struct drm_gem_object *obj);
|
2020-11-03 17:30:12 +08:00
|
|
|
int drm_gem_vmap(struct drm_gem_object *obj, struct dma_buf_map *map);
|
|
|
|
|
void drm_gem_vunmap(struct drm_gem_object *obj, struct dma_buf_map *map);
|
2019-06-15 04:35:18 +08:00
|
|
|
|
2017-09-15 06:12:02 +08:00
|
|
|
int drm_gem_dumb_destroy(struct drm_file *file, struct drm_device *dev,
|
|
|
|
|
u32 handle);
|
|
|
|
|
|
2017-03-23 04:54:01 +08:00
|
|
|
/* drm_debugfs.c drm_debugfs_crc.c */
|
2014-09-23 21:46:52 +08:00
|
|
|
#if defined(CONFIG_DEBUG_FS)
|
|
|
|
|
int drm_debugfs_init(struct drm_minor *minor, int minor_id,
|
|
|
|
|
struct dentry *root);
|
2019-06-13 21:34:39 +08:00
|
|
|
void drm_debugfs_cleanup(struct drm_minor *minor);
|
|
|
|
|
void drm_debugfs_connector_add(struct drm_connector *connector);
|
2014-09-23 21:46:52 +08:00
|
|
|
void drm_debugfs_connector_remove(struct drm_connector *connector);
|
2019-06-13 21:34:39 +08:00
|
|
|
void drm_debugfs_crtc_add(struct drm_crtc *crtc);
|
2016-10-06 23:21:06 +08:00
|
|
|
void drm_debugfs_crtc_remove(struct drm_crtc *crtc);
|
2019-06-13 21:34:39 +08:00
|
|
|
void drm_debugfs_crtc_crc_add(struct drm_crtc *crtc);
|
2014-09-23 21:46:52 +08:00
|
|
|
#else
|
|
|
|
|
static inline int drm_debugfs_init(struct drm_minor *minor, int minor_id,
|
|
|
|
|
struct dentry *root)
|
|
|
|
|
{
|
|
|
|
|
return 0;
|
|
|
|
|
}
|
|
|
|
|
|
2019-06-13 21:34:39 +08:00
|
|
|
static inline void drm_debugfs_cleanup(struct drm_minor *minor)
|
2014-09-23 21:46:52 +08:00
|
|
|
{
|
|
|
|
|
}
|
|
|
|
|
|
2019-06-13 21:34:39 +08:00
|
|
|
static inline void drm_debugfs_connector_add(struct drm_connector *connector)
|
2014-09-23 21:46:52 +08:00
|
|
|
{
|
|
|
|
|
}
|
|
|
|
|
static inline void drm_debugfs_connector_remove(struct drm_connector *connector)
|
|
|
|
|
{
|
|
|
|
|
}
|
2016-10-06 23:21:06 +08:00
|
|
|
|
2019-06-13 21:34:39 +08:00
|
|
|
static inline void drm_debugfs_crtc_add(struct drm_crtc *crtc)
|
2016-10-06 23:21:06 +08:00
|
|
|
{
|
|
|
|
|
}
|
|
|
|
|
static inline void drm_debugfs_crtc_remove(struct drm_crtc *crtc)
|
|
|
|
|
{
|
|
|
|
|
}
|
|
|
|
|
|
2019-06-13 21:34:39 +08:00
|
|
|
static inline void drm_debugfs_crtc_crc_add(struct drm_crtc *crtc)
|
2016-10-06 23:21:06 +08:00
|
|
|
{
|
|
|
|
|
}
|
2017-04-04 11:26:24 +08:00
|
|
|
|
2014-09-23 21:46:52 +08:00
|
|
|
#endif
|
2017-04-04 11:26:24 +08:00
|
|
|
|
2017-05-25 02:11:03 +08:00
|
|
|
drm_ioctl_t drm_version;
|
2017-05-25 02:15:20 +08:00
|
|
|
drm_ioctl_t drm_getunique;
|
2017-05-25 07:10:32 +08:00
|
|
|
drm_ioctl_t drm_getclient;
|
2017-07-10 09:48:37 +08:00
|
|
|
|
2017-04-04 11:26:24 +08:00
|
|
|
/* drm_syncobj.c */
|
|
|
|
|
void drm_syncobj_open(struct drm_file *file_private);
|
|
|
|
|
void drm_syncobj_release(struct drm_file *file_private);
|
|
|
|
|
int drm_syncobj_create_ioctl(struct drm_device *dev, void *data,
|
|
|
|
|
struct drm_file *file_private);
|
|
|
|
|
int drm_syncobj_destroy_ioctl(struct drm_device *dev, void *data,
|
|
|
|
|
struct drm_file *file_private);
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int drm_syncobj_handle_to_fd_ioctl(struct drm_device *dev, void *data,
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struct drm_file *file_private);
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int drm_syncobj_fd_to_handle_ioctl(struct drm_device *dev, void *data,
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struct drm_file *file_private);
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2019-04-01 17:51:01 +08:00
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int drm_syncobj_transfer_ioctl(struct drm_device *dev, void *data,
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struct drm_file *file_private);
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2017-08-26 01:52:22 +08:00
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int drm_syncobj_wait_ioctl(struct drm_device *dev, void *data,
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struct drm_file *file_private);
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2019-04-01 17:50:57 +08:00
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int drm_syncobj_timeline_wait_ioctl(struct drm_device *dev, void *data,
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struct drm_file *file_private);
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2017-08-29 05:10:27 +08:00
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int drm_syncobj_reset_ioctl(struct drm_device *dev, void *data,
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struct drm_file *file_private);
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2017-08-29 05:10:28 +08:00
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int drm_syncobj_signal_ioctl(struct drm_device *dev, void *data,
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struct drm_file *file_private);
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2019-04-01 17:51:02 +08:00
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int drm_syncobj_timeline_signal_ioctl(struct drm_device *dev, void *data,
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struct drm_file *file_private);
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2019-04-01 17:50:58 +08:00
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int drm_syncobj_query_ioctl(struct drm_device *dev, void *data,
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struct drm_file *file_private);
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2017-11-08 03:13:40 +08:00
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/* drm_framebuffer.c */
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void drm_framebuffer_print_info(struct drm_printer *p, unsigned int indent,
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const struct drm_framebuffer *fb);
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2020-03-10 21:31:21 +08:00
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void drm_framebuffer_debugfs_init(struct drm_minor *minor);
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