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| author |   Chris Wilson <chris@chris-wilson.co.uk> | 2020-01-30 18:17:10 +0000 |
|---|---|---|
| committer | Chris Wilson <chris@chris-wilson.co.uk> | 2020-01-30 21:35:43 +0000 |
| commit | e3793468b4660a9825eb3a149aab1bcd0de7a4f2 (patch) | |
| tree | 548f103e1c902446cf136ce28f0cd550d5ab3661 /drivers/gpu/drm/i915/i915_vma.h | |
| parent | drm/i915/gt: Rename i915_gem_restore_ggtt_mappings() for its new placement (diff) | |
| download | linux-dev-e3793468b4660a9825eb3a149aab1bcd0de7a4f2.tar.xz linux-dev-e3793468b4660a9825eb3a149aab1bcd0de7a4f2.zip | |
drm/i915: Use the async worker to avoid reclaim tainting the ggtt->mutex
On Braswell and Broxton (also known as Valleyview and Apollolake), we
need to serialise updates of the GGTT using the big stop_machine()
hammer. This has the side effect of appearing to lockdep as a possible
reclaim (since it uses the cpuhp mutex and that is tainted by per-cpu
allocations). However, we want to use vm->mutex (including ggtt->mutex)
from within the shrinker and so must avoid such possible taints. For this
purpose, we introduced the asynchronous vma binding and we can apply it
to the PIN_GLOBAL so long as take care to add the necessary waits for
the worker afterwards.
Closes: https://gitlab.freedesktop.org/drm/intel/issues/211
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Matthew Auld <matthew.auld@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200130181710.2030251-3-chris@chris-wilson.co.uk
Diffstat (limited to 'drivers/gpu/drm/i915/i915_vma.h')
| -rw-r--r-- | drivers/gpu/drm/i915/i915_vma.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/i915_vma.h b/drivers/gpu/drm/i915/i915_vma.h index 02b31a62951e..e1ced1df13e1 100644 --- a/drivers/gpu/drm/i915/i915_vma.h +++ b/drivers/gpu/drm/i915/i915_vma.h @@ -375,6 +375,8 @@ struct i915_vma *i915_vma_make_unshrinkable(struct i915_vma *vma); void i915_vma_make_shrinkable(struct i915_vma *vma); void i915_vma_make_purgeable(struct i915_vma *vma); +int i915_vma_wait_for_bind(struct i915_vma *vma); + static inline int i915_vma_sync(struct i915_vma *vma) { /* Wait for the asynchronous bindings and pending GPU reads */ |