linux-toradex.git/drivers/gpu/drm/ttm/ttm_bo.c, branch v3.2.74

drm/ttm: Fix memory type compatibility check

2014-01-03T04:33:17+00:00

commit 59c8e66378fb78adbcd05f0d09783dde6fef282b upstream.

Also check the busy placements before deciding to move a buffer object.
Failing to do this may result in a completely unneccessary move within a
single memory type.

Signed-off-by: Thomas Hellstrom 
Reviewed-by: Jakob Bornecrantz 
[bwh: Backported to 3.2: adjust context]
Signed-off-by: Ben Hutchings

drm/ttm: Fix spinlock imbalance

2012-06-10T13:41:55+00:00

commit a8ff3ee211fccf708e1911bbc096625453ebf759 upstream.

This imbalance may cause hangs when TTM is trying to swap out a buffer
that is already on the delayed delete list.

Signed-off-by: Thomas Hellstrom 
Reviewed-by: Jakob Bornecrantz 
Signed-off-by: Dave Airlie 
Signed-off-by: Ben Hutchings

ttm: Don't return the bo reserved on error path

2011-11-22T20:06:21+00:00

An unlikely race could case a bo to be returned reserved on an error path.

Signed-off-by: Thomas Hellstrom 
Reviewed-by: Jerome Glisse 
Signed-off-by: Dave Airlie

Revert "drm/ttm: add a way to bo_wait for either the last read or last write"

2011-10-27T16:28:37+00:00

This reverts commit dfadbbdb57b3f2bb33e14f129a43047c6f0caefa.

Further upstream discussion between Marek and Thomas decided this wasn't
fully baked and needed further work, so revert it before it hits mainline.

Signed-off-by: Dave Airlie

Merge tag 'v3.1-rc10' into drm-core-next

2011-10-18T09:54:30+00:00

There are a number of fixes in mainline required for code in -next,
also there was a few conflicts I'd rather resolve myself.

Signed-off-by: Dave Airlie 

Conflicts:
	drivers/gpu/drm/radeon/evergreen.c
	drivers/gpu/drm/radeon/r600.c
	drivers/gpu/drm/radeon/radeon_asic.h

ttm: export ttm_bo_create

2011-10-05T09:17:07+00:00

Used by the vmwgfx driver.

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

drm/ttm: request zeroed system memory pages for new TT buffer objects

2011-09-14T12:34:51+00:00

Fixes an information leak to userspace, we were handing out un-zeroed pages
for any newly created TTM_PL_TT buffer.

Reported-by: Marcin Slusarz 
Signed-off-by: Ben Skeggs 
Tested-by: Marcin Slusarz 
Cc: stable@kernel.org
Signed-off-by: Dave Airlie

drm/ttm: add a way to bo_wait for either the last read or last write

2011-08-31T18:25:35+00:00

Sometimes we want to know whether a buffer is busy and wait for it (bo_wait).
However, sometimes it would be more useful to be able to query whether
a buffer is busy and being either read or written, and wait until it's stopped
being either read or written. The point of this is to be able to avoid
unnecessary waiting, e.g. if a GPU has written something to a buffer and is now
reading that buffer, and a CPU wants to map that buffer for read, it needs to
only wait for the last write. If there were no write, there wouldn't be any
waiting needed.

This, or course, requires user space drivers to send read/write flags
with each relocation (like we have read/write domains in radeon, so we can
actually use those for something useful now).

Now how this patch works:

The read/write flags should passed to ttm_validate_buffer. TTM maintains
separate sync objects of the last read and write for each buffer, in addition
to the sync object of the last use of a buffer. ttm_bo_wait then operates
with one the sync objects.

Signed-off-by: Marek Olšák 
Reviewed-by: Jerome Glisse 
Signed-off-by: Dave Airlie

drm/ttm: ensure ttm for new node is bound before calling move_notify()

2011-08-23T08:38:30+00:00

This was true for new TTM_PL_SYSTEM and new TTM_PL_TT cases, but wasn't
the case on TTM_PL_SYSTEM<->TTM_PL_TT moves, which causes trouble on some
paths as nouveau's move_notify() hook requires that the dma addresses be
valid at this point.

Signed-off-by: Ben Skeggs 
Signed-off-by: Dave Airlie

drm/ttm: fix ttm_bo_add_ttm(user) failure path

2011-08-23T08:34:18+00:00

ttm_tt_destroy kfrees passed object, so we need to nullify
a reference to it.

Signed-off-by: Marcin Slusarz 
Cc: stable@kernel.org
Reviewed-by: Thomas Hellstrom 
Signed-off-by: Dave Airlie