drm/amdgpu: Port to DragonFly

* This commit does not build as it requires ttm changes from
the corresponding commit

Amdgpu driver changes:
* Builds with CONFIG_DRM_AMD_DC and CONFIG_DRM_AMD_DC_DC

drm/amdgpu: Port to DragonFly

* This commit does not build as it requires ttm changes from
the corresponding commit

Amdgpu driver changes:
* Builds with CONFIG_DRM_AMD_DC and CONFIG_DRM_AMD_DC_DCN1_0 defined
* Support for older GPUs (SI, CIK) is not implemented
* Several functions for display core module require msse and
mhard-float gcc flags to be set; and they require special
treatment from kernel by utilizing kernel_fpu_begin/kernel_fpu_end
functions
* It is required that tunable set amdgpu_hw_i2c=1 to work around
panic during module load
* Thunderbolt support is disabled
* Amdgpu trace infrastructure replaced by a stub

Drm changes:
* register_framebuffer is called at the later stage, after crtcs
were properly initialized
* drm_close implemented
* drm_connector_update_edid_property implemented
* Fix drm device stays locked in case of an error or module shutdown
* Imported drm gem framebuffer helper functions
* Fixed null pointer deref in the drm mmap ioctl
* Imported atomic64_inc and atomic_long_* functions from Linux
* Imported bitmap_complement function from Linux
* Imported kfifo struct from Linux
* Implemented dma fence array properly
* Imported rb_root_cached struct from Linux
* Implemented several dma fence functions

Co-authored-by: François Tigeot <ftigeot@wolfpond.org>
Co-authored-by: Matthew Dillon <dillon@apollo.backplane.com>

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drm: Update to Linux 4.15.18

* Create /dev/dri/renderD* devices
Generally handle /dev entries creation as close to Linux as possible.

* Add drm master support
Sync authentification code with Li

drm: Update to Linux 4.15.18

* Create /dev/dri/renderD* devices
Generally handle /dev entries creation as close to Linux as possible.

* Add drm master support
Sync authentification code with Linux 4.15.18

* handle vm_mm->mmap_sem in ttm page fault operations

* Update dma-fence code from OpenBSD

* This commit contains sleep/wakeup and other changes
from Matthew Dillon <dillon@apollo.backplane.com>

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drm: Update to Linux 4.12.14

* Initial Geminilake support

* Support improvements and model-specific bug fixes for Broxton, Haswell,
Broadwell, Skylake and Kabylake hardware

* Various generic i91

drm: Update to Linux 4.12.14

* Initial Geminilake support

* Support improvements and model-specific bug fixes for Broxton, Haswell,
Broadwell, Skylake and Kabylake hardware

* Various generic i915 bug fixes, including page flipping and memory
corruption issues

* Minor radeon bug fixes

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drm/linux: break from wait_event_xxx() loops sooner

drm/linux: Fix lost wakeup event issues with wait_event_xxx() routines

Submitted-by: Matthew Dillon <dillon@apollo.backplane.com>

drm: Add headers, stubs and constants required by Linux 4.10 code

drm/linux: Add wake_up_bit() and wait_on_bit_timeout()

drm/linux: Add __add_wait_queue_tail()

Obtained-from: FreeBSD

drm/linux: Implement more parts of prepare_to_wait() and finish_wait()

drm/linux: Rework wait_event_xxx and finish_wait functions

* Add required task state change in finish_wait()

* Move some formerly inline code to linux_wait.c in order to avoid
problematic header

drm/linux: Rework wait_event_xxx and finish_wait functions

* Add required task state change in finish_wait()

* Move some formerly inline code to linux_wait.c in order to avoid
problematic header interactions

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drm/linux: fix a bug in DEFINE_WAIT()

The wake-up function was not properly set up.

drm/linux: Add or improve some wait_queue functions

drm/linux: Rework wait_event_xxx() macros

The wait queue lock must not be held permanently.

This commit should fix issue #3200, reported-by Peeter.

drm/linux: Restore wait_event*() functionality

* Our wait_event* routines do not (yet) use Linux wait queues.
Threads using them still have to be woken up with a different mechanism.

* Restore th

drm/linux: Restore wait_event*() functionality

* Our wait_event* routines do not (yet) use Linux wait queues.
Threads using them still have to be woken up with a different mechanism.

* Restore the wakeup*() calls directly using wait_queue_head_t pointers

* While there, also properly set the current Linux thread states in the
wait_event*() routines

Issue with the previous commit reported by zrj.

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drm/linux: Rework wait queues

* Make the implementation much closer to the Linux one

* Do not directly try to wake up threads, but use an indirect function
call to do it, allowing drivers to over

drm/linux: Rework wait queues

* Make the implementation much closer to the Linux one

* Do not directly try to wake up threads, but use an indirect function
call to do it, allowing drivers to override the default function

* Implement the expected default_wake_function() and
autoremove_wake_function() routines

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drm/linux: Add wait_event_interruptible_locked()

drm/linux: Improve linux/wait.h

drm/linux/rbtree.h: Rename RB_ROOT to LINUX_RB_ROOT

Preventing clashes with the more general RB_ROOT kernel definition

drm/linux: Implement more kobject parts

drm: Sync include directives with Linux

* Add a few key include/asm or include/linux headers

* Move some code from .h to .c files in order to avoid clashes
between the DragonFly and Linux variant

drm: Sync include directives with Linux

* Add a few key include/asm or include/linux headers

* Move some code from .h to .c files in order to avoid clashes
between the DragonFly and Linux variants of kmalloc() and kfree()

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drm/linux: Add a few functions (mostly stubs)

drm/linux: Add or improve various header files

drm: Update drm_irq.c...

... to commit 56cc279b29c7b204fe7d0943509ae209b8b128db from Linux 3.18
drm: Fix deadlock between event_lock and vbl_lock/vblank_time_lock

Imre Vadász noticed a deadlock in

drm: Update drm_irq.c...

... to commit 56cc279b29c7b204fe7d0943509ae209b8b128db from Linux 3.18
drm: Fix deadlock between event_lock and vbl_lock/vblank_time_lock

Imre Vadász noticed a deadlock in the drm code handling vblank irqs.
Fortunately, this was also noticed by the Linux drm developers and fixing
the issue was just a matter of updating drm_irq.c

Reviewed-by: ivadasz

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drm: Add linux/spinlock.h

drm: Add wake_up_interruptible_all()