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Commit 6e32ab3d authored by Chris Wilson's avatar Chris Wilson
Browse files

drm/i915: Fill different pages of the GTT 



Exercise filling different pages of the GTT

v2: Walk all holes until we timeout

Signed-off-by: default avatarChris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: default avatarJoonas Lahtinen <joonas.lahtinen@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20170213171558.20942-30-chris@chris-wilson.co.uk
parent 62c981cf

drivers/gpu/drm/i915/selftests/i915_gem_gtt.c

+93 −0
Original line number Diff line number Diff line
@@ -409,6 +409,87 @@ static int fill_hole(struct drm_i915_private *i915, 
	return err;

}



static int walk_hole(struct drm_i915_private *i915,

		     struct i915_address_space *vm,

		     u64 hole_start, u64 hole_end,

		     unsigned long end_time)

{

	const u64 hole_size = hole_end - hole_start;

	const unsigned long max_pages =

		min_t(u64, ULONG_MAX - 1, hole_size >> PAGE_SHIFT);

	unsigned long flags;

	u64 size;



	/* Try binding a single VMA in different positions within the hole */



	flags = PIN_OFFSET_FIXED | PIN_USER;

	if (i915_is_ggtt(vm))

		flags |= PIN_GLOBAL;



	for_each_prime_number_from(size, 1, max_pages) {

		struct drm_i915_gem_object *obj;

		struct i915_vma *vma;

		u64 addr;

		int err = 0;



		obj = fake_dma_object(i915, size << PAGE_SHIFT);

		if (IS_ERR(obj))

			break;



		vma = i915_vma_instance(obj, vm, NULL);

		if (IS_ERR(vma)) {

			err = PTR_ERR(vma);

			goto err;

		}



		for (addr = hole_start;

		     addr + obj->base.size < hole_end;

		     addr += obj->base.size) {

			err = i915_vma_pin(vma, 0, 0, addr | flags);

			if (err) {

				pr_err("%s bind failed at %llx + %llx [hole %llx- %llx] with err=%d\n",

				       __func__, addr, vma->size,

				       hole_start, hole_end, err);

				goto err;

			}

			i915_vma_unpin(vma);



			if (!drm_mm_node_allocated(&vma->node) ||

			    i915_vma_misplaced(vma, 0, 0, addr | flags)) {

				pr_err("%s incorrect at %llx + %llx\n",

				       __func__, addr, vma->size);

				err = -EINVAL;

				goto err;

			}



			err = i915_vma_unbind(vma);

			if (err) {

				pr_err("%s unbind failed at %llx + %llx  with err=%d\n",

				       __func__, addr, vma->size, err);

				goto err;

			}



			GEM_BUG_ON(drm_mm_node_allocated(&vma->node));



			if (igt_timeout(end_time,

					"%s timed out at %llx\n",

					__func__, addr)) {

				err = -EINTR;

				goto err;

			}

		}



err:

		if (!i915_vma_is_ggtt(vma))

			i915_vma_close(vma);

		i915_gem_object_put(obj);

		if (err)

			return err;

	}



	return 0;

}



static int exercise_ppgtt(struct drm_i915_private *dev_priv,

			  int (*func)(struct drm_i915_private *i915,

				      struct i915_address_space *vm,
@@ -452,6 +533,11 @@ static int igt_ppgtt_fill(void *arg) 
	return exercise_ppgtt(arg, fill_hole);

}



static int igt_ppgtt_walk(void *arg)

{

	return exercise_ppgtt(arg, walk_hole);

}



static int sort_holes(void *priv, struct list_head *A, struct list_head *B)

{

	struct drm_mm_node *a = list_entry(A, typeof(*a), hole_stack);
@@ -506,11 +592,18 @@ static int igt_ggtt_fill(void *arg) 
	return exercise_ggtt(arg, fill_hole);

}



static int igt_ggtt_walk(void *arg)

{

	return exercise_ggtt(arg, walk_hole);

}



int i915_gem_gtt_live_selftests(struct drm_i915_private *i915)

{

	static const struct i915_subtest tests[] = {

		SUBTEST(igt_ppgtt_alloc),

		SUBTEST(igt_ppgtt_walk),

		SUBTEST(igt_ppgtt_fill),

		SUBTEST(igt_ggtt_walk),

		SUBTEST(igt_ggtt_fill),

	};