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author | Chris Wilson <chris@chris-wilson.co.uk> | 2016-08-04 07:52:45 +0100 |
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committer | Chris Wilson <chris@chris-wilson.co.uk> | 2016-08-04 08:09:33 +0100 |
commit | b1f788c6acb2f34622dd5f4c3d5210c6e3945e78 (patch) | |
tree | a03c247cf86bee1df25f3271b504ad4b036264f5 /drivers/gpu/drm/i915/i915_gem_gtt.c | |
parent | b0decaf75bd902a11c932005c88924947ac00b8c (diff) | |
download | blackbird-op-linux-b1f788c6acb2f34622dd5f4c3d5210c6e3945e78.tar.gz blackbird-op-linux-b1f788c6acb2f34622dd5f4c3d5210c6e3945e78.zip |
drm/i915: Release vma when the handle is closed
In order to prevent a leak of the vma on shared objects, we need to
hook into the object_close callback to destroy the vma on the object for
this file. However, if we destroyed that vma immediately we may cause
unexpected application stalls as we try to unbind a busy vma - hence we
defer the unbind to when we retire the vma.
v2: Keep vma allocated until closed. This is useful for a later
optimisation, but it is required now in order to handle potential
recursion of i915_vma_unbind() by retiring itself.
v3: Comments are important.
Testcase: igt/gem_ppggtt/flink-and-close-vma-leak
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Tvrtko Ursulin <tvrtko.ursulin@linux.intel.com>
Cc: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
Reviewed-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1470293567-10811-26-git-send-email-chris@chris-wilson.co.uk
Diffstat (limited to 'drivers/gpu/drm/i915/i915_gem_gtt.c')
-rw-r--r-- | drivers/gpu/drm/i915/i915_gem_gtt.c | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/i915_gem_gtt.c b/drivers/gpu/drm/i915/i915_gem_gtt.c index 3e5d39dc7de0..3e9d735cf2c3 100644 --- a/drivers/gpu/drm/i915/i915_gem_gtt.c +++ b/drivers/gpu/drm/i915/i915_gem_gtt.c @@ -3342,6 +3342,31 @@ i915_vma_retire(struct i915_gem_active *active, return; list_move_tail(&vma->vm_link, &vma->vm->inactive_list); + if (unlikely(vma->closed && !vma->pin_count)) + WARN_ON(i915_vma_unbind(vma)); +} + +void i915_vma_destroy(struct i915_vma *vma) +{ + GEM_BUG_ON(vma->node.allocated); + GEM_BUG_ON(i915_vma_is_active(vma)); + GEM_BUG_ON(!vma->closed); + + list_del(&vma->vm_link); + if (!vma->is_ggtt) + i915_ppgtt_put(i915_vm_to_ppgtt(vma->vm)); + + kmem_cache_free(to_i915(vma->obj->base.dev)->vmas, vma); +} + +void i915_vma_close(struct i915_vma *vma) +{ + GEM_BUG_ON(vma->closed); + vma->closed = true; + + list_del_init(&vma->obj_link); + if (!i915_vma_is_active(vma) && !vma->pin_count) + WARN_ON(__i915_vma_unbind_no_wait(vma)); } static struct i915_vma * |