linux/include/drm/ttm, branch v3.13

Merge branch 'ttm-fixes-3.13' of git://people.freedesktop.org/~thomash/linux into drm-fixes

2013-11-21T08:46:56Z

The set_need_resched() removal fix and yet another fix in ttm_bo_move_memcpy(). * 'ttm-fixes-3.13' of git://people.freedesktop.org/~thomash/linux: drm/ttm: Remove set_need_resched from the ttm fault handler drm/ttm: Don't move non-existing data

drm/ttm: Remove set_need_resched from the ttm fault handler

2013-11-20T11:46:54Z

Addresses "[BUG] completely bonkers use of set_need_resched + VM_FAULT_NOPAGE". In the first occurence it was used to try to be nice while releasing the mmap_sem and retrying the fault to work around a locking inversion. The second occurence was never used. There has been some discussion whether we should change the locking order to mmap_sem -> bo_reserve. This patch doesn't address that issue, and leaves that locking order undefined. The solution that we release the mmap_sem if tryreserve fails and wait for the buffer to become unreserved is something we want in any case, and follows how the core vm system waits for pages to be come unlocked while releasing the mmap_sem. The code also outlines what needs to be changed if we want to establish the locking order as mmap_sem -> bo::reserve. One slight issue that remains with this code is that the fault handler might be prone to starvation if another thread countinously reserves the buffer. IMO that usage pattern is highly unlikely. Signed-off-by: Thomas Hellstrom

drm/ttm: Add a minimal prime implementation for ttm base objects

2013-11-18T08:46:41Z

Signed-off-by: Thomas Hellstrom Reviewed-by: Jakob Bornecrantz

drm/ttm: Allow execbuf util reserves without ticket

2013-11-18T08:38:52Z

If no reservation ticket is given to the execbuf reservation utilities, try reservation with non-blocking semantics. This is intended for eviction paths that use the execbuf reservation utilities for convenience rather than for deadlock avoidance. Signed-off-by: Thomas Hellstrom Reviewed-by: Jakob Bornecrantz

drm/ttm: Enable the dma page pool also for intel IOMMUs

2013-11-06T11:55:52Z

Used by the vmwgfx driver Signed-off-by: Thomas Hellstrom Reviewed-by: Jakob Bornecrantz Reviewed-by: Konrad Rzeszutek Wilk

drm/ttm: convert to unified vma offset manager

2013-07-25T10:47:07Z

Use the new vma-manager infrastructure. This doesn't change any implementation details as the vma-offset-manager is nearly copied 1-to-1 from TTM. The vm_lock is moved into the offset manager so we can drop it from TTM. During lookup, we use the vma locking helpers to take a reference to the found object. In all other scenarios, locking stays the same as before. We always guarantee that drm_vma_offset_remove() is called only during destruction. Hence, helpers like drm_vma_node_offset_addr() are always safe as long as the node has a valid offset. This also drops the addr_space_offset member as it is a copy of vm_start in vma_node objects. Use the accessor functions instead. v4: - remove vm_lock - use drm_vma_offset_lock_lookup() to protect lookup (instead of vm_lock) Cc: Dave Airlie Cc: Ben Skeggs Cc: Maarten Lankhorst Cc: Martin Peres Cc: Alex Deucher Cc: Thomas Hellstrom Signed-off-by: David Herrmann Reviewed-by: Daniel Vetter Signed-off-by: Dave Airlie

drm/ttm: get rid of ttm_bo_is_reserved

2013-06-28T02:04:15Z

Signed-off-by: Maarten Lankhorst Signed-off-by: Dave Airlie

drm/ttm: inline ttm_bo_reserve and related calls

2013-06-28T02:04:09Z

Makes lockdep a lot more useful. Signed-off-by: Maarten Lankhorst Signed-off-by: Dave Airlie

drm/ttm: convert to the reservation api

2013-06-28T02:04:01Z

Now that the code is compatible in semantics, flip the switch. Use ww_mutex instead of the homegrown implementation. ww_mutex uses -EDEADLK to signal that the caller has to back off, and -EALREADY to indicate this buffer is already held by the caller. ttm used -EAGAIN and -EDEADLK for those, respectively. So some changes were needed to handle this correctly. Signed-off-by: Maarten Lankhorst Reviewed-by: Jerome Glisse Signed-off-by: Dave Airlie

drm/ttm: make ttm reservation calls behave like reservation calls

2013-06-28T02:02:20Z

This commit converts the source of the val_seq counter to the ww_mutex api. The reservation objects are converted later, because there is still a lockdep splat in nouveau that has to resolved first. Signed-off-by: Maarten Lankhorst Reviewed-by: Jerome Glisse Signed-off-by: Dave Airlie