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| author | Chris Wilson <chris@chris-wilson.co.uk> | 2019-12-23 00:02:55 +0300 |
|---|---|---|
| committer | Chris Wilson <chris@chris-wilson.co.uk> | 2019-12-23 15:31:54 +0300 |
| commit | 76f9764cc3d538435262dea885bf69fac2415402 (patch) | |
| tree | 480bf43fb3319a28f171f9fbbb23499235814ea3 /drivers/gpu/drm/i915/i915_vma.c | |
| parent | f5af1659d809e264d619e5f483fd8f47bced3b6a (diff) | |
| download | linux-76f9764cc3d538435262dea885bf69fac2415402.tar.xz | |
drm/i915: Introduce a vma.kref
Start introducing a kref on i915_vma in order to protect the vma unbind
(i915_gem_object_unbind) from a parallel destruction (i915_vma_parked).
Later, we will use the refcount to manage all access and turn i915_vma
into a first class container.
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Imre Deak <imre.deak@intel.com>
Acked-by: Imre Deak <imre.deak@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20191222210256.2066451-2-chris@chris-wilson.co.uk
Diffstat (limited to 'drivers/gpu/drm/i915/i915_vma.c')
| -rw-r--r-- | drivers/gpu/drm/i915/i915_vma.c | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/drivers/gpu/drm/i915/i915_vma.c b/drivers/gpu/drm/i915/i915_vma.c index f3ac837ba3b3..cbd783c31adb 100644 --- a/drivers/gpu/drm/i915/i915_vma.c +++ b/drivers/gpu/drm/i915/i915_vma.c @@ -114,6 +114,7 @@ vma_create(struct drm_i915_gem_object *obj, if (vma == NULL) return ERR_PTR(-ENOMEM); + kref_init(&vma->ref); mutex_init(&vma->pages_mutex); vma->vm = i915_vm_get(vm); vma->ops = &vm->vma_ops; @@ -1021,8 +1022,10 @@ void i915_vma_reopen(struct i915_vma *vma) __i915_vma_remove_closed(vma); } -void i915_vma_destroy(struct i915_vma *vma) +void i915_vma_release(struct kref *ref) { + struct i915_vma *vma = container_of(ref, typeof(*vma), ref); + if (drm_mm_node_allocated(&vma->node)) { mutex_lock(&vma->vm->mutex); atomic_and(~I915_VMA_PIN_MASK, &vma->flags); @@ -1072,7 +1075,7 @@ void i915_vma_parked(struct intel_gt *gt) spin_unlock_irq(>->closed_lock); if (obj) { - i915_vma_destroy(vma); + __i915_vma_put(vma); i915_gem_object_put(obj); } @@ -1236,7 +1239,7 @@ int __i915_vma_unbind(struct i915_vma *vma) i915_vma_detach(vma); vma_unbind_pages(vma); - drm_mm_remove_node(&vma->node); /* pairs with i915_vma_destroy() */ + drm_mm_remove_node(&vma->node); /* pairs with i915_vma_release() */ return 0; } |