From: Ramalingam C ramalingam.c@intel.com
Functions for window_blt_copy defined to create and destroy the dummy vmas for virtual memory, which dont have any associated objects.
These dummy vmas are used at window_blt_copy festure to associated to set of pages and create ptes at runtime and submit it for blt copy.
Signed-off-by: Ramalingam C ramalingam.c@intel.com Cc: Matthew Auld matthew.auld@intel.com Cc: CQ Tang cq.tang@intel.com --- drivers/gpu/drm/i915/i915_vma.c | 38 +++++++++++++++++++++++++++++++++ drivers/gpu/drm/i915/i915_vma.h | 6 ++++++ 2 files changed, 44 insertions(+)
diff --git a/drivers/gpu/drm/i915/i915_vma.c b/drivers/gpu/drm/i915/i915_vma.c index 59fe82af48b2..5537950e310f 100644 --- a/drivers/gpu/drm/i915/i915_vma.c +++ b/drivers/gpu/drm/i915/i915_vma.c @@ -100,6 +100,44 @@ static void __i915_vma_retire(struct i915_active *ref) i915_vma_put(active_to_vma(ref)); }
+struct i915_vma * +i915_alloc_window_vma(struct drm_i915_private *i915, + struct i915_address_space *vm, u64 size, + u64 min_page_size) +{ + struct i915_vma *vma; + + vma = i915_vma_alloc(); + if (!vma) + return ERR_PTR(-ENOMEM); + + kref_init(&vma->ref); + mutex_init(&vma->pages_mutex); + vma->vm = i915_vm_get(vm); + vma->ops = &vm->vma_ops; + vma->obj = NULL; + vma->resv = NULL; + vma->size = size; + vma->display_alignment = I915_GTT_MIN_ALIGNMENT; + vma->page_sizes.sg = min_page_size; + + i915_active_init(&vma->active, __i915_vma_active, __i915_vma_retire); + INIT_LIST_HEAD(&vma->closed_link); + + GEM_BUG_ON(!IS_ALIGNED(vma->size, I915_GTT_PAGE_SIZE)); + GEM_BUG_ON(i915_is_ggtt(vm)); + + return vma; +} + +void i915_destroy_window_vma(struct i915_vma *vma) +{ + i915_active_fini(&vma->active); + i915_vm_put(vma->vm); + mutex_destroy(&vma->pages_mutex); + i915_vma_free(vma); +} + static struct i915_vma * vma_create(struct drm_i915_gem_object *obj, struct i915_address_space *vm, diff --git a/drivers/gpu/drm/i915/i915_vma.h b/drivers/gpu/drm/i915/i915_vma.h index 2db4f25b8d5f..f595fe706010 100644 --- a/drivers/gpu/drm/i915/i915_vma.h +++ b/drivers/gpu/drm/i915/i915_vma.h @@ -44,6 +44,12 @@ i915_vma_instance(struct drm_i915_gem_object *obj, struct i915_address_space *vm, const struct i915_ggtt_view *view);
+struct i915_vma * +i915_alloc_window_vma(struct drm_i915_private *i915, + struct i915_address_space *vm, u64 size, + u64 min_page_size); +void i915_destroy_window_vma(struct i915_vma *vma); + void i915_vma_unpin_and_release(struct i915_vma **p_vma, unsigned int flags); #define I915_VMA_RELEASE_MAP BIT(0)