diff options
| author | Jordan Crouse <jcrouse@codeaurora.org> | 2018-11-07 15:35:51 -0700 |
|---|---|---|
| committer | Rob Clark <robdclark@gmail.com> | 2018-12-11 13:05:32 -0500 |
| commit | 7ad0e8cf6317825d2b7fc52a9000fb16461c2857 (patch) | |
| tree | e57b5891e2092e5fd4aa1650c8aecac5a4caff9b /drivers/gpu/drm/msm/msm_gem.h | |
| parent | 9fe041f6fdfedd92e15dd81d96475ff04bdf879e (diff) | |
drm/msm: Count how many times iova memory is pinned
Add a reference count to track how many times a particular
chunk of iova memory is pinned (mapped) in the iomu and
add msm_gem_unpin_iova to give up references.
It is important to note that msm_gem_unpin_iova replaces
msm_gem_put_iova because the new implicit behavior
that an assigned iova in a given vma is now valid for the
life of the buffer and what we are really focusing on is
the use of that iova.
For now the unmappings are lazy; once the reference counts
go to zero they *COULD* be unmapped dynamically but that
will require an outside force such as a shrinker or
mm_notifiers. For now, we're just focusing on getting
the counting right and setting ourselves up to be ready
for the future.
Signed-off-by: Jordan Crouse <jcrouse@codeaurora.org>
Signed-off-by: Rob Clark <robdclark@gmail.com>
Diffstat (limited to 'drivers/gpu/drm/msm/msm_gem.h')
| -rw-r--r-- | drivers/gpu/drm/msm/msm_gem.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/gpu/drm/msm/msm_gem.h b/drivers/gpu/drm/msm/msm_gem.h index a44847364504..b318fe278e52 100644 --- a/drivers/gpu/drm/msm/msm_gem.h +++ b/drivers/gpu/drm/msm/msm_gem.h @@ -42,6 +42,7 @@ struct msm_gem_vma { struct msm_gem_address_space *aspace; struct list_head list; /* node in msm_gem_object::vmas */ bool mapped; + int inuse; }; struct msm_gem_object { |