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

MFC r258779,r258780,r258787,r258822:

Fix undefined behavior: (1 << 31) is not defined as 1 is an int and this
shifts into the sign bit. Instead use (1U << 31) which gets the
expected result.

Similar to the (1 << 31) case it is not defined to do (2 << 30).

This fix is not ideal as it assumes a 32 bit int, but does fix the issue
for most cases.

A similar change was made in OpenBSD.

MFC r259684:

drm/ttm, drm/radeon: Replace EINTR/ERESTART by ERESTARTSYS...

... for msleep/cv_*wait() return values, where wait_event*() is used
on Linux. ERESTARTSYS is the return code expected by callers when the
operation was interrupted.

For instance, this is the case of radeon_cs_ioctl() (radeon_cs.c): if
an error occurs, and the code isn't ERESTARTSYS (eg. EINTR), it logs an
error.

Note that ERESTARTSYS is defined as ERESTART, but this keeps callers'
code close to Linux.

Submitted by: avg@ (previous version)

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: Fix a reversed condition and add missing locks

This allows to run OpenGL applications on at least two test machines
with the Radeon driver.

Approved by: kib@

drm/ttm: Fix unmap of buffer object

Add a new ttm_bo_release_mmap() function to unmap pages in a
vm_object_t. Pages are freed when the buffer object is later released.

This function is called in ttm_bo_unmap_virtual_locked(), replacing
Linux' unmap_mapping_range(). In particular this is called when a buffer
object is about to be moved, so that its mapping is invalidated.

However, we don't use this function in ttm_bo_vm_dtor(), because the
vm_object_t is already marked as OBJ_DEAD and the pages will be
unmapped.

Approved by: kib@

drm/ttm: Fix style errors

drm/ttm: Import Linux commit 014b34409fb2015f63663b6cafdf557fdf289628

Author: Dave Airlie <airlied@gmail.com>
Date: Wed Jan 16 15:58:34 2013 +1000

ttm: on move memory failure don't leave a node dangling

if we have a move notify callback, when moving fails, we call move notify
the opposite way around, however this ends up with *mem containing the mm_node
from the bo, which means we double free it. This is a follow on to the previous
fix.

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

Approved by: kib@

drm/ttm: Import Linux commit cc4c0c4de3c775be22072ec3251f2e581b63d9a0

Author: Maarten Lankhorst <maarten.lankhorst@canonical.com>
Date: Tue Jan 15 14:57:28 2013 +0100

drm/ttm: unexport ttm_bo_wait_unreserved

All legitimate users of this function outside ttm_bo.c are gone, now
it's only an implementation detail.

Signed-off-by: Maarten Lankhorst <maarten.lankhorst@canonical.com>
Reviewed-by: Jerome Glisse <jglisse@redhat.com>

Approved by: kib@

drm/ttm: Import Linux commit 5e45d7dfd74100d622f9cdc70bfd1f9fae1671de

Author: Maarten Lankhorst <maarten.lankhorst@canonical.com>
Date: Tue Jan 15 14:57:05 2013 +0100

drm/ttm: add ttm_bo_reserve_slowpath

Instead of dropping everything, waiting for the bo to be unreserved
and trying over, a better strategy would be to do a blocking wait.

This can be mapped a lot better to a mutex_lock-like call.

Signed-off-by: Maarten Lankhorst <maarten.lankhorst@canonical.com>
Reviewed-by: Jerome Glisse <jglisse@redhat.com>

Approved by: kib@

drm/ttm: Import Linux commit 7a1863084c9d90ce4b67d645bf9b0f1612e68f62

Author: Maarten Lankhorst <maarten.lankhorst@canonical.com>
Date: Tue Jan 15 14:56:48 2013 +0100

drm/ttm: cleanup ttm_eu_reserve_buffers handling

With the lru lock no longer required for protecting reservations we
can just do a ttm_bo_reserve_nolru on -EBUSY, and handle all errors
in a single path.

Signed-off-by: Maarten Lankhorst <maarten.lankhorst@canonical.com>
Reviewed-by: Jerome Glisse <jglisse@redhat.com>

drm/ttm: Import Linux commit 63d0a4195560362e2e00a3ad38fc331d34e1da9b

Author: Maarten Lankhorst <maarten.lankhorst@canonical.com>
Date: Tue Jan 15 14:56:37 2013 +0100

drm/ttm: remove lru_lock around ttm_bo_reserve

There should no longer be assumptions that reserve will always succeed
with the lru lock held, so we can safely break the whole atomic
reserve/lru thing. As a bonus this fixes most lockdep annotations for
reservations.

Signed-off-by: Maarten Lankhorst <maarten.lankhorst@canonical.com>
Reviewed-by: Jerome Glisse <jglisse@redhat.com>

drm: Fix a call to free(9) with an incorrect malloc type

While here, the call to free(9) is moved to drm_global.c, near the
initial malloc(9).

Reviewed by: Konstantin Belousov (kib@)

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