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| 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_drv.h | |
| parent | drm/msm: Add msm_gem_get_and_pin_iova() (diff) | |
| download | linux-dev-7ad0e8cf6317825d2b7fc52a9000fb16461c2857.tar.xz linux-dev-7ad0e8cf6317825d2b7fc52a9000fb16461c2857.zip | |
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_drv.h')
| -rw-r--r-- | drivers/gpu/drm/msm/msm_drv.h | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/drivers/gpu/drm/msm/msm_drv.h b/drivers/gpu/drm/msm/msm_drv.h index 4372505a0bda..955c2f522db6 100644 --- a/drivers/gpu/drm/msm/msm_drv.h +++ b/drivers/gpu/drm/msm/msm_drv.h @@ -243,10 +243,14 @@ void msm_atomic_state_free(struct drm_atomic_state *state); int msm_gem_init_vma(struct msm_gem_address_space *aspace, struct msm_gem_vma *vma, int npages); +void msm_gem_purge_vma(struct msm_gem_address_space *aspace, + struct msm_gem_vma *vma); void msm_gem_unmap_vma(struct msm_gem_address_space *aspace, struct msm_gem_vma *vma); int msm_gem_map_vma(struct msm_gem_address_space *aspace, struct msm_gem_vma *vma, struct sg_table *sgt, int npages); +void msm_gem_close_vma(struct msm_gem_address_space *aspace, + struct msm_gem_vma *vma); void msm_gem_address_space_put(struct msm_gem_address_space *aspace); @@ -275,10 +279,10 @@ int msm_gem_get_and_pin_iova(struct drm_gem_object *obj, struct msm_gem_address_space *aspace, uint64_t *iova); uint64_t msm_gem_iova(struct drm_gem_object *obj, struct msm_gem_address_space *aspace); +void msm_gem_unpin_iova(struct drm_gem_object *obj, + struct msm_gem_address_space *aspace); struct page **msm_gem_get_pages(struct drm_gem_object *obj); void msm_gem_put_pages(struct drm_gem_object *obj); -void msm_gem_put_iova(struct drm_gem_object *obj, - struct msm_gem_address_space *aspace); int msm_gem_dumb_create(struct drm_file *file, struct drm_device *dev, struct drm_mode_create_dumb *args); int msm_gem_dumb_map_offset(struct drm_file *file, struct drm_device *dev, |