[PATCH 48/75] drm/i915: Verify page layout for rotated VMA
Chris Wilson
chris at chris-wilson.co.uk
Thu Feb 2 14:35:11 UTC 2017
Exercise creating rotated VMA and checking the page order within.
v2..v3: Be more creative in rotated params
Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin at intel.com>
---
drivers/gpu/drm/i915/selftests/i915_vma.c | 179 ++++++++++++++++++++++++++++++
1 file changed, 179 insertions(+)
diff --git a/drivers/gpu/drm/i915/selftests/i915_vma.c b/drivers/gpu/drm/i915/selftests/i915_vma.c
index 095d8348f5f0..4a737a670199 100644
--- a/drivers/gpu/drm/i915/selftests/i915_vma.c
+++ b/drivers/gpu/drm/i915/selftests/i915_vma.c
@@ -352,11 +352,190 @@ static int igt_vma_pin1(void *arg)
return err;
}
+static unsigned long rotated_index(const struct intel_rotation_info *r,
+ unsigned int n,
+ unsigned int x,
+ unsigned int y)
+{
+ return (r->plane[n].stride * (r->plane[n].height - y - 1) +
+ r->plane[n].offset + x);
+}
+
+static struct scatterlist *
+assert_rotated(struct drm_i915_gem_object *obj,
+ const struct intel_rotation_info *r, unsigned int n,
+ struct scatterlist *sg)
+{
+ unsigned int x, y;
+
+ for (x = 0; x < r->plane[n].width; x++) {
+ for (y = 0; y < r->plane[n].height; y++) {
+ unsigned long src_idx;
+ dma_addr_t src;
+
+ if (!sg) {
+ pr_err("Invalid sg table: too short at plane %d, (%d, %d)!\n",
+ n, x, y);
+ return ERR_PTR(-EINVAL);
+ }
+
+ src_idx = rotated_index(r, n, x, y);
+ src = i915_gem_object_get_dma_address(obj, src_idx);
+
+ if (sg_dma_len(sg) != PAGE_SIZE) {
+ pr_err("Invalid sg.length, found %d, expected %lu for rotated page (%d, %d) [src index %lu]\n",
+ sg_dma_len(sg), PAGE_SIZE,
+ x, y, src_idx);
+ return ERR_PTR(-EINVAL);
+ }
+
+ if (sg_dma_address(sg) != src) {
+ pr_err("Invalid address for rotated page (%d, %d) [src index %lu]\n",
+ x, y, src_idx);
+ return ERR_PTR(-EINVAL);
+ }
+
+ sg = sg_next(sg);
+ }
+ }
+
+ return sg;
+}
+
+static unsigned int rotated_size(const struct intel_rotation_plane_info *a,
+ const struct intel_rotation_plane_info *b)
+{
+ return a->width * a->height + b->width * b->height;
+}
+
+static int igt_vma_rotate(void *arg)
+{
+ struct drm_i915_private *i915 = arg;
+ struct i915_address_space *vm = &i915->ggtt.base;
+ struct drm_i915_gem_object *obj;
+ const struct intel_rotation_plane_info planes[] = {
+ { .width = 1, .height = 1, .stride = 1 },
+ { .width = 2, .height = 2, .stride = 2 },
+ { .width = 4, .height = 4, .stride = 4 },
+ { .width = 8, .height = 8, .stride = 8 },
+
+ { .width = 3, .height = 5, .stride = 3 },
+ { .width = 3, .height = 5, .stride = 4 },
+ { .width = 3, .height = 5, .stride = 5 },
+
+ { .width = 5, .height = 3, .stride = 5 },
+ { .width = 5, .height = 3, .stride = 7 },
+ { .width = 5, .height = 3, .stride = 9 },
+
+ { .width = 4, .height = 6, .stride = 6 },
+ { .width = 6, .height = 4, .stride = 6 },
+ { }
+ }, *a, *b;
+ const unsigned int max_pages = 64;
+ int err = -ENOMEM;
+
+ /* Create VMA for many different combinations of planes and check
+ * that the page layout within the rotated VMA match our expectations.
+ */
+
+ obj = i915_gem_object_create_internal(i915, max_pages * PAGE_SIZE);
+ if (IS_ERR(obj))
+ goto out;
+
+ for (a = planes; a->width; a++) {
+ for (b = planes + ARRAY_SIZE(planes); b-- != planes; ) {
+ struct i915_ggtt_view view;
+ unsigned int n, max_offset;
+
+ max_offset = max(a->stride * a->height,
+ b->stride * b->height);
+ GEM_BUG_ON(max_offset > max_pages);
+ max_offset = max_pages - max_offset;
+
+ view.type = I915_GGTT_VIEW_ROTATED;
+ view.rotated.plane[0] = *a;
+ view.rotated.plane[1] = *b;
+
+ for_each_prime_number_from(view.rotated.plane[0].offset, 0, max_offset) {
+ for_each_prime_number_from(view.rotated.plane[1].offset, 0, max_offset) {
+ struct scatterlist *sg;
+ struct i915_vma *vma;
+
+ vma = checked_vma_instance(obj, vm, &view);
+ if (IS_ERR(vma)) {
+ err = PTR_ERR(vma);
+ goto out_object;
+ }
+
+ err = i915_vma_pin(vma, 0, 0, PIN_GLOBAL);
+ if (err) {
+ pr_err("Failed to pin VMA, err=%d\n", err);
+ goto out_object;
+ }
+
+ if (vma->size != rotated_size(a, b) * PAGE_SIZE) {
+ pr_err("VMA is wrong size, expected %lu, found %llu\n",
+ PAGE_SIZE * rotated_size(a, b), vma->size);
+ err = -EINVAL;
+ goto out_object;
+ }
+
+ if (vma->pages->nents != rotated_size(a, b)) {
+ pr_err("sg table is wrong sizeo, expected %u, found %u nents\n",
+ rotated_size(a, b), vma->pages->nents);
+ err = -EINVAL;
+ goto out_object;
+ }
+
+ if (vma->node.size < vma->size) {
+ pr_err("VMA binding too small, expected %llu, found %llu\n",
+ vma->size, vma->node.size);
+ err = -EINVAL;
+ goto out_object;
+ }
+
+ if (vma->pages == obj->mm.pages) {
+ pr_err("VMA using unrotated object pages!\n");
+ err = -EINVAL;
+ goto out_object;
+ }
+
+ sg = vma->pages->sgl;
+ for (n = 0; n < ARRAY_SIZE(view.rotated.plane); n++) {
+ sg = assert_rotated(obj, &view.rotated, n, sg);
+ if (IS_ERR(sg)) {
+ pr_err("Inconsistent VMA pages for plane %d: [(%d, %d, %d, %d), (%d, %d, %d, %d)]\n", n,
+ view.rotated.plane[0].width,
+ view.rotated.plane[0].height,
+ view.rotated.plane[0].stride,
+ view.rotated.plane[0].offset,
+ view.rotated.plane[1].width,
+ view.rotated.plane[1].height,
+ view.rotated.plane[1].stride,
+ view.rotated.plane[1].offset);
+ err = -EINVAL;
+ goto out_object;
+ }
+ }
+
+ i915_vma_unpin(vma);
+ }
+ }
+ }
+ }
+
+out_object:
+ i915_gem_object_put(obj);
+out:
+ return err;
+}
+
int i915_vma_mock_selftests(void)
{
static const struct i915_subtest tests[] = {
SUBTEST(igt_vma_create),
SUBTEST(igt_vma_pin1),
+ SUBTEST(igt_vma_rotate),
};
struct drm_i915_private *i915;
int err;
--
2.11.0
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