From: Ramalingam C <ramalingam.c@xxxxxxxxx>
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@xxxxxxxxx>
Cc: Matthew Auld <matthew.auld@xxxxxxxxx>
Cc: CQ Tang <cq.tang@xxxxxxxxx>
---
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)
--
2.26.2
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