Quoting Ville Syrjala (2018-09-25 20:37:11)
> From: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
>
> Add a live selftest to excercise rotated/remapped vmas. We simply
> write through the rotated/remapped vma, and confirm that the data
> appears in the right page when read through the normal vma.
>
> Not sure what the fallout of making all rotated/remapped vmas
> mappable/fenceable would be, hence I just hacked it in the test.
>
> Signed-off-by: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
> ---
> .../gpu/drm/i915/selftests/i915_live_selftests.h | 1 +
> drivers/gpu/drm/i915/selftests/i915_vma.c | 136 +++++++++++++++++++++
> 2 files changed, 137 insertions(+)
>
> diff --git a/drivers/gpu/drm/i915/selftests/i915_live_selftests.h b/drivers/gpu/drm/i915/selftests/i915_live_selftests.h
> index a15713cae3b3..095e25e92a36 100644
> --- a/drivers/gpu/drm/i915/selftests/i915_live_selftests.h
> +++ b/drivers/gpu/drm/i915/selftests/i915_live_selftests.h
> @@ -15,6 +15,7 @@ selftest(workarounds, intel_workarounds_live_selftests)
> selftest(requests, i915_request_live_selftests)
> selftest(objects, i915_gem_object_live_selftests)
> selftest(dmabuf, i915_gem_dmabuf_live_selftests)
> +selftest(vma, i915_vma_live_selftests)
> selftest(coherency, i915_gem_coherency_live_selftests)
> selftest(gtt, i915_gem_gtt_live_selftests)
> selftest(gem, i915_gem_live_selftests)
> diff --git a/drivers/gpu/drm/i915/selftests/i915_vma.c b/drivers/gpu/drm/i915/selftests/i915_vma.c
> index 6e84e5cc93a0..e0e4d4578c4d 100644
> --- a/drivers/gpu/drm/i915/selftests/i915_vma.c
> +++ b/drivers/gpu/drm/i915/selftests/i915_vma.c
> @@ -797,3 +797,139 @@ int i915_vma_mock_selftests(void)
> return err;
> }
>
> +static int igt_vma_remapped_gtt(void *arg)
> +{
> + struct drm_i915_private *i915 = arg;
> + const struct intel_remapped_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 },
> + { }
> + }, *p;
> + enum i915_ggtt_view_type types[] = {
> + I915_GGTT_VIEW_ROTATED,
> + I915_GGTT_VIEW_REMAPPED,
> + 0,
> + }, *t;
> + struct drm_i915_gem_object *obj;
> + int err = 0;
> +
> + obj = i915_gem_object_create_internal(i915, 10 * 10 * PAGE_SIZE);
> + if (IS_ERR(obj))
> + return PTR_ERR(obj);
> +
> + mutex_lock(&i915->drm.struct_mutex);
> +
> + for (t = types; *t; t++) {
> + for (p = planes; p->width; p++) {
> + struct i915_ggtt_view view = {
> + .type = *t,
> + .rotated.plane[0] = *p,
> + };
> + struct i915_vma *vma;
> + u32 __iomem *map;
> + unsigned int x, y;
> + int err;
> +
> + err = i915_gem_object_set_to_gtt_domain(obj, true);
> + if (err)
> + goto out;
> +
> + vma = i915_gem_object_ggtt_pin(obj, &view, 0, 0, PIN_MAPPABLE);
Ok. Code needs a little more help to allow PIN_MAPPABLE on unfenceable
vma. Personally, I'd just kill the exception from
__i915_vma_set_map_and_fenceable(). Nobody actually grabs the fence for
remapped vma afaict, so we shouldn't end with a wasted fence.
> + if (IS_ERR(vma)) {
> + err = PTR_ERR(vma);
> + goto out;
> + }
Hmm, I guess we might need a GEM_BUG_ON(vma->view.type != *t); and co
> +
> + /* kludge */
> + vma->flags |= I915_VMA_CAN_FENCE;
> +
> + map = i915_vma_pin_iomap(vma);
> + i915_vma_unpin(vma);
> + if (IS_ERR(map)) {
> + err = PTR_ERR(map);
> + goto out;
> + }
> +
> + for (y = 0 ; y < p->height; y++) {
> + for (x = 0 ; x < p->width; x++) {
> + unsigned int offset;
> + u32 val = y << 16 | x;
> +
> + if (*t == I915_GGTT_VIEW_ROTATED)
> + offset = (x * p->height + y) * PAGE_SIZE;
> + else
> + offset = (y * p->width + x) * PAGE_SIZE;
> +
> + iowrite32(val, &map[offset / sizeof(*map)]);
> + }
> + }
> +
> + i915_vma_unpin_iomap(vma);
> +
> + vma = i915_gem_object_ggtt_pin(obj, NULL, 0, 0, PIN_MAPPABLE);
> + if (IS_ERR(vma)) {
> + err = PTR_ERR(vma);
> + goto out;
> + }
GEM_BUG_ON(vma->view.type);
-Chris
_______________________________________________
Intel-gfx mailing list
Intel-gfx@xxxxxxxxxxxxxxxxxxxxx
https://lists.freedesktop.org/mailman/listinfo/intel-gfx
