Copy stable/10@r272459 to releng/10.1 as part of
the 10.1-RELEASE process.

Approved by: re (implicit)
Sponsored by: The FreeBSD Foundation

Copy head (r256279) to stable/10 as part of the 10.0-RELEASE cycle.

Approved by: re (implicit)
Sponsored by: The FreeBSD Foundation

Partially revert r254880. The bitmap operations actually use long type now.

drm: Use the new drm_atomic.h, following the merge of projects/atomic64

Submitted by: jkim@

drm/ttm: Import Linux commit ff7c60c580d9722f820d85c9c58ca55ecc1ee7c4

Author: Daniel Vetter <daniel.vetter@ffwll.ch>
Date: Mon Jan 14 15:08:14 2013 +0100

drm/ttm: fix fence locking in ttm_buffer_object_transfer, 2nd try

This fixes up

commit e8e89622ed361c46bf90ba4828e685a8b603f7e5
Author: Daniel Vetter <daniel.vetter@ffwll.ch>
Date: Tue Dec 18 22:25:11 2012 +0100

drm/ttm: fix fence locking in ttm_buffer_object_transfer

which leaves behind a might_sleep in atomic context, since the
fence_lock spinlock is held over a kmalloc(GFP_KERNEL) call. The fix
is to revert the above commit and only take the lock where we need it,
around the call to ->sync_obj_ref.

v2: Fixup things noticed by Maarten Lankhorst:
- Brown paper bag locking bug.
- No need for kzalloc if we clear the entire thing on the next line.
- check for bo->sync_obj (totally unlikely race, but still someone
else could have snuck in) and clear fbo->sync_obj if it's cleared
already.

Reported-by: Dave Airlie <airlied@gmail.com>
Cc: Jerome Glisse <jglisse@redhat.com>
Cc: Maarten Lankhorst <maarten.lankhorst@canonical.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Dave Airlie <airlied@redhat.com>

Approved by: kib@

drm/ttm: Import Linux commit 630541863b29f88c7ab34e647758344e4cd1eafd

Author: Dave Airlie <airlied@gmail.com>
Date: Wed Jan 16 14:25:44 2013 +1000

ttm: don't destroy old mm_node on memcpy failure

When we are using memcpy to move objects around, and we fail to memcpy
due to lack of memory to populate or failure to finish the copy, we don't
want to destroy the mm_node that has been copied into old_copy.

While working on a new kms driver that uses memcpy, if I overallocated bo's
up to the memory limits, and eviction failed, then machine would oops soon
after due to having an active bo with an already freed drm_mm embedded in it,
freeing it a second time didn't end well.

Reviewed-by: Jerome Glisse <jglisse@redhat.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>

Approved by: kib@

Replace kernel virtual address space allocation with vmem. This provides
transparent layering and better fragmentation.

- Normalize functions that allocate memory to use kmem_*
- Those that allocate address space are named kva_*
- Those that operate on maps are named kmap_*
- Implement recursive allocation handling for kmem_arena in vmem.

Reviewed by: alc
Tested by: pho
Sponsored by: EMC / Isilon Storage Division

Do not call malloc(M_WAITOK) while bodev->fence_lock mutex is
held. The ttm_buffer_object_transfer() does not need the mutex locked
at all, except for the call to the driver sync_obj_ref() method.

Reported and tested by: dumbbell
MFC after: 2 weeks

Import the preliminary port of the TTM.

The early commit is done to facilitate the off-tree work on the
porting of the Radeon driver.

Sponsored by: The FreeBSD Foundation
Debugged and tested by: dumbbell
MFC after: 1 month