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: Add kthread parking functions

drm/linux: Do not sleep when not required in schedule_timeout()

drm: Add linux/llist.h

Mostly obtained from OpenBSD with a few key modifications

drm: Add a few Linux headers

drm/linux: Add pagefault_disabled

drm/linux: Add schedule_timeout_uninterruptible()

drm/linux: Add Linux kthread functions

drm/linux: Add a few linux/sched functions

drm/i915: Update to Linux commit 1f15b76f1ec973d1eb5d21b6d98b21aebb9025f1

"Separate GPU hang waitqueue from advance"

drm: Add linux/smp.h

drm: Update generic, ttm and radeon code to Linux 4.9

* Generally cleanup non driver-specific code and increase its
robustness

* DisplayPort support improvements

* Atomic modesetting improvement

drm: Update generic, ttm and radeon code to Linux 4.9

* Generally cleanup non driver-specific code and increase its
robustness

* DisplayPort support improvements

* Atomic modesetting improvements

* Radeon performance and stability improvements

* drm/i915 stays based on Linux 4.7.10 with Linux 4.19 changes
for now

Reviewed-by: Romick

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drm - Refactor task_struct and implement mm_struct

* Change td->td_linux_task from an embedded structure to a pointer.

* Add p->p_linux_mm to support tracking mm_struct's.

* Change the 'current' m

drm - Refactor task_struct and implement mm_struct

* Change td->td_linux_task from an embedded structure to a pointer.

* Add p->p_linux_mm to support tracking mm_struct's.

* Change the 'current' macro to test td->td_linux_task and call
a support function, linux_task_alloc(), if it is NULL.

* Implement callbacks from the main kernel for thread exit and
process exit to support functions that drop the td_linux_task and
p_linux_mm pointers.

Initialize and clear these callbacks in the module load/unload
in drm_drv.c

* Implement required support functions in linux_sched.c

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drm/linux: Fix a NULL pointer dereference in signal_pending_state()

Not all kernel threads have an associated userland lwp.

Reported-by: dillon

drm - Fix system lockup bug in signal_pending_state()

* Fix a system lockup bug in signal_pending_state(). It was
possible for the routine to indicate that no signal was pending
for an interrup

drm - Fix system lockup bug in signal_pending_state()

* Fix a system lockup bug in signal_pending_state(). It was
possible for the routine to indicate that no signal was pending
for an interruptible state when a signal was in fact pending,
causing a live-lock in a lksleep() loop.

* The proper API is to allow any signal to interrupt when the
thread is in an interruptible state and to only allow a KILL
signal to interrupt when the thread is in a non-interruptible
state.

Testing-by: dillon, tuxillo
Reviewed-by: ftigeot

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drm/linux: Add io_schedule_timeout()

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: Fix schedule_timeout()

Interruptible sleeps were returning wrong values.

drm/linux: Add task_struct, rework sleep and wake up functions

Really implement wake_up_process(), signal_pending(),
signal_pending_state() and schedule_timeout()

Some fixes contributed by Matthew

drm/linux: Add task_struct, rework sleep and wake up functions

Really implement wake_up_process(), signal_pending(),
signal_pending_state() and schedule_timeout()

Some fixes contributed by Matthew Dillon.

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drm/ttm: convert to unified vma offset manager

* Add TTM_BO_PRIV_FLAG_ACTIVE.

* Changes so we can use more of the linux ttm_bo_vm.c code. Fake
struct vm_fault, fake struct vm_operations_struct,

drm/ttm: convert to unified vma offset manager

* Add TTM_BO_PRIV_FLAG_ACTIVE.

* Changes so we can use more of the linux ttm_bo_vm.c code. Fake
struct vm_fault, fake struct vm_operations_struct, and adjust
struct vm_area_struct. Also add related flags.

The VM interface to DragonFlyBSD is now (mostly) a wrapper around
the linux code.

* The linux red/black tree code uses some of the DFly RB macros.
This means that struct rb_root must be compatible. Add missing
fields. This fixes RB_REMOVE breakage due to it trying to iterate
rbh_inprog.

* Add set_need_resched() (empty)

* radeon_bo_is_reserved() is no longer applicable and has been removed,
allowing us to avoid implementintg ttm_bo_is_reserved(). Note that
linux-current does not have these functions.

* Refactor radeon_do_test_moves() so reflect the linux code a bit
better. This fixes a few error paths.

* radeon_verify_access() remains empty. We need the struct file
(which we don't have) to implement it.

* Make some adjustments to ttm_mem_type_from_pace() and other
API functions which use struct ttm_place instead of uint32_t.
This better reflects the linux code and fixes compile-time breakage
due to the partial API patch.

Make other struct ttm_place adjustments.

* bdev->dev_mapping is broken (partial API update in WIP) and is
still always NULL because ttm_bo_device_init() does not yet initialize
it (needs an argument passed from the chipset code).

* refactor ttm_bo_man_get_node() to fix compile issues.

* Completely rewrite the DragonFly API interfacing code in ttm_bo_vm.c.
Hopefully the fault code is now far, far more robust than it was before.

Add debug code to check for duplicate vm_page insertions, in case
we hit that panic again (it had problems due to bdev->dev_mapping being
NULL before that issue was tracked down).

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drm: Add or improve a few include/linux headers

drm/linux: Add asm/processor.h

drm/linux: Add preempt.h