kernel.git/drivers/gpu/drm/ttm, branch linux-2.6.37.y

drm/ttm: Fix up a theoretical deadlock

2010-11-18T05:00:42Z

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

2010-11-10T01:52:19Z

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

2010-11-09T03:39:06Z

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

2010-11-09T03:38:32Z

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

2010-11-09T03:33:57Z

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

2010-11-09T03:33:49Z

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

2010-11-09T03:33:42Z

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

2010-11-09T03:33:33Z

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

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

2010-11-09T03:33:24Z

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

2010-11-09T03:33:15Z

Remove an obsolete comment about mm nodes. Document the new bo range manager interface. Signed-off-by: Thomas Hellstrom Signed-off-by: Dave Airlie