Quoting Ville Syrjala (2018-09-25 20:37:10)
> From: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
>
> Extend the rotated vma mock selftest to cover remapped vmas as
> well.
>
> TODO: reindent the loops I guess? Left like this for now to
> ease review
>
> Signed-off-by: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
> ---
> drivers/gpu/drm/i915/selftests/i915_vma.c | 70 ++++++++++++++++++++++++++++---
> 1 file changed, 65 insertions(+), 5 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/selftests/i915_vma.c b/drivers/gpu/drm/i915/selftests/i915_vma.c
> index 4fc49c27f13c..6e84e5cc93a0 100644
> --- a/drivers/gpu/drm/i915/selftests/i915_vma.c
> +++ b/drivers/gpu/drm/i915/selftests/i915_vma.c
> @@ -58,7 +58,7 @@ static bool assert_vma(struct i915_vma *vma,
> static struct i915_vma *
> checked_vma_instance(struct drm_i915_gem_object *obj,
> struct i915_address_space *vm,
> - struct i915_ggtt_view *view)
> + const struct i915_ggtt_view *view)
> {
> struct i915_vma *vma;
> bool ok = true;
> @@ -395,13 +395,63 @@ assert_rotated(struct drm_i915_gem_object *obj,
> return sg;
> }
>
> +static unsigned long remapped_index(const struct intel_remapped_info *r,
> + unsigned int n,
> + unsigned int x,
> + unsigned int y)
> +{
> + return (r->plane[n].stride * y +
> + r->plane[n].offset + x);
> +}
> +
> +static struct scatterlist *
> +assert_remapped(struct drm_i915_gem_object *obj,
> + const struct intel_remapped_info *r, unsigned int n,
> + struct scatterlist *sg)
> +{
> + unsigned int x, y;
> +
> + for (y = 0; y < r->plane[n].height; y++) {
> + for (x = 0; x < r->plane[n].width; x++) {
> + 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 = remapped_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 remapped 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 remapped 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_remapped_plane_info *a,
> const struct intel_remapped_plane_info *b)
> {
> return a->width * a->height + b->width * b->height;
> }
>
> -static int igt_vma_rotate(void *arg)
> +static int igt_vma_rotate_remap(void *arg)
> {
> struct drm_i915_private *i915 = arg;
> struct i915_address_space *vm = &i915->ggtt.vm;
> @@ -424,6 +474,11 @@ static int igt_vma_rotate(void *arg)
> { .width = 6, .height = 4, .stride = 6 },
> { }
> }, *a, *b;
> + enum i915_ggtt_view_type types[] = {
> + I915_GGTT_VIEW_ROTATED,
> + I915_GGTT_VIEW_REMAPPED,
> + 0,
> + }, *t;
> const unsigned int max_pages = 64;
> int err = -ENOMEM;
>
> @@ -435,6 +490,7 @@ static int igt_vma_rotate(void *arg)
> if (IS_ERR(obj))
> goto out;
>
> + for (t = types; *t; t++) {
> for (a = planes; a->width; a++) {
> for (b = planes + ARRAY_SIZE(planes); b-- != planes; ) {
> struct i915_ggtt_view view;
> @@ -445,7 +501,7 @@ static int igt_vma_rotate(void *arg)
> GEM_BUG_ON(max_offset > max_pages);
> max_offset = max_pages - max_offset;
>
> - view.type = I915_GGTT_VIEW_ROTATED;
> + view.type = *t;
> view.rotated.plane[0] = *a;
> view.rotated.plane[1] = *b;
>
> @@ -495,7 +551,10 @@ static int igt_vma_rotate(void *arg)
>
> sg = vma->pages->sgl;
> for (n = 0; n < ARRAY_SIZE(view.rotated.plane); n++) {
> - sg = assert_rotated(obj, &view.rotated, n, sg);
> + if (view.type == I915_GGTT_VIEW_ROTATED)
> + sg = assert_rotated(obj, &view.rotated, n, sg);
> + else
> + sg = assert_remapped(obj, &view.remapped, n, sg);
> if (IS_ERR(sg)) {
> pr_err("Inconsistent VMA pages for plane %d: [(%d, %d, %d, %d), (%d, %d, %d, %d)]\n", n,
Looks ok, but we need to include the remap type in the error statement
if we either want to decypher what may have gone wrong. I see the
assert callbacks do include the hint, but adding an extra "%s" here may
help.
-Chris
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