linux.git/drivers/gpu/drm/ttm, branch v2.6.37

drm/ttm: Fix up a theoretical deadlock

2010-11-18T05:00:42+00:00

A process suspended waiting for a higher sequence or no sequence to unreserve,
a bo may be beaten to the reservation by a process with a lower sequence.
In that case the first process should give up trying to reserve and
return -EAGAIN. In order for that to happen, we must wake waiting processes
when we change sequence, so that they have a chance to detect the new
sequence.

Signed-off-by: Thomas Hellstrom 
Signed-off-by: Dave Airlie

drm/ttm: Be consistent on ttm_bo_init() failures

2010-11-10T01:52:19+00:00

Call destroy() on _all_ ttm_bo_init() failures, and make sure that
behavior is documented in the function description.

Signed-off-by: Thomas Hellstrom 
Signed-off-by: Dave Airlie

drm/ttm: Remove the CAP_SYS_ADMIN requirement for bo pinning

2010-11-09T03:39:06+00:00

This breaks vmwgfx non-root EGL clients and is a remnant from the
TTM user-space interface. This test should be done in the driver.
Replace the remaining placement test with a BUG_ON, since triggering
it is a driver bug.

Signed-off-by: Thomas Hellstrom 
Signed-off-by: Dave Airlie

drm/ttm: Make sure a sync object doesn't disappear while we use it

2010-11-09T03:38:32+00:00

The sync object may disappear as soon as we release the bo::lock, so
take a reference on it while we use it.
One option would be to call sync_object_flush() before releasing the bo::lock,
but that would put an atomic requirement on that function.

Signed-off-by: Thomas Hellstrom 
Signed-off-by: Dave Airlie

drm/ttm: remove failed ttm binding error printout

2010-11-09T03:33:57+00:00

The driver (for example vmwgfx) may want to silently deal with the
error itself.

Signed-off-by: Thomas Hellstrom 
Signed-off-by: Dave Airlie

drm/ttm: Add a barrier when unreserving

2010-11-09T03:33:49+00:00

Since we're doing this outside of a spinlock to provide the necessary
barriers, add an explicit barrier.

Signed-off-by: Thomas Hellstrom 
Signed-off-by: Dave Airlie

drm/ttm: Remove mm init error printouts and checks

2010-11-09T03:33:42+00:00

Replace with BUG_ON(). These error messages remained from the time
when TTM was initialized from user-space. Nowadays hitting one of those
is really a kernel bug.

Signed-off-by: Thomas Hellstrom 
Signed-off-by: Dave Airlie

drm/ttm: Remove pointless list_empty check

2010-11-09T03:33:33+00:00

Signed-off-by: Thomas Hellstrom 
Signed-off-by: Dave Airlie

drm/ttm: Use private locks for the default bo range manager

2010-11-09T03:33:24+00:00

Searching for a free block in the range manager may in some situations be a
lenghty operation, and we want to avoid holding the global lru lock
during that time. Instead use a per-manager spinlock.

This leaves the global lru lock for quick lru list and swap list manipulation
only, including list manipulation associated with reserving buffer objects.

Signed-off-by: Thomas Hellstrom 
Signed-off-by: Dave Airlie

drm/ttm: Documentation update

2010-11-09T03:33:15+00:00

Remove an obsolete comment about mm nodes.
Document the new bo range manager interface.

Signed-off-by: Thomas Hellstrom 
Signed-off-by: Dave Airlie