Exercise filling different pages of the GTT
Signed-off-by: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>
---
drivers/gpu/drm/i915/selftests/i915_gem_gtt.c | 130 ++++++++++++++++++++++++++
1 file changed, 130 insertions(+)
diff --git a/drivers/gpu/drm/i915/selftests/i915_gem_gtt.c b/drivers/gpu/drm/i915/selftests/i915_gem_gtt.c
index 8ed88f438eef..68f7bfb7502e 100644
--- a/drivers/gpu/drm/i915/selftests/i915_gem_gtt.c
+++ b/drivers/gpu/drm/i915/selftests/i915_gem_gtt.c
@@ -231,6 +231,65 @@ 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)
+{
+ I915_SELFTEST_TIMEOUT(end_time);
+ struct drm_i915_gem_object *obj;
+ struct i915_vma *vma;
+ u64 addr;
+ int err;
+
+ obj = i915_gem_object_create_internal(i915, PAGE_SIZE);
+ if (IS_ERR(obj))
+ return PTR_ERR(obj);
+
+ vma = vma_lookup(obj, vm);
+ if (IS_ERR(vma)) {
+ err = PTR_ERR(vma);
+ goto err;
+ }
+
+ for (addr = hole_start; addr < hole_end; addr += PAGE_SIZE) {
+ cond_resched();
+
+ err = i915_vma_pin(vma, 0, 0,
+ addr | PIN_OFFSET_FIXED | PIN_USER);
+ if (err) {
+ pr_err("Walk bind failed at %llx with err=%d\n",
+ addr, err);
+ break;
+ }
+ i915_vma_unpin(vma);
+
+ if (!drm_mm_node_allocated(&vma->node) ||
+ i915_vma_misplaced(vma, 0, 0, addr | PIN_OFFSET_FIXED)) {
+ pr_err("Walk incorrect at %llx\n", addr);
+ err = -EINVAL;
+ break;
+ }
+
+ err = i915_vma_unbind(vma);
+ if (err) {
+ pr_err("Walk unbind failed at %llx with err=%d\n",
+ addr, err);
+ break;
+ }
+
+ if (time_after(jiffies, end_time)) {
+ pr_warn("Walk timed out at %llx\n", addr);
+ break;
+ }
+ }
+
+ if (!i915_vma_is_ggtt(vma))
+ i915_vma_close(vma);
+err:
+ i915_gem_object_put(obj);
+ return err;
+}
+
static int igt_ppgtt_fill(void *arg)
{
struct drm_i915_private *dev_priv = arg;
@@ -264,6 +323,39 @@ static int igt_ppgtt_fill(void *arg)
return err;
}
+static int igt_ppgtt_walk(void *arg)
+{
+ struct drm_i915_private *dev_priv = arg;
+ struct drm_file *file;
+ struct i915_hw_ppgtt *ppgtt;
+ int err;
+
+ if (!USES_FULL_PPGTT(dev_priv))
+ return 0;
+
+ file = fake_file(dev_priv);
+ if (IS_ERR(file))
+ return PTR_ERR(file);
+
+ mutex_lock(&dev_priv->drm.struct_mutex);
+ ppgtt = i915_ppgtt_create(dev_priv, file->driver_priv, "mock");
+ if (IS_ERR(ppgtt)) {
+ err = PTR_ERR(ppgtt);
+ goto err_unlock;
+ }
+ GEM_BUG_ON(ppgtt->base.total & ~PAGE_MASK);
+
+ err = walk_hole(dev_priv, &ppgtt->base, 0, ppgtt->base.total);
+
+ i915_ppgtt_close(&ppgtt->base);
+ i915_ppgtt_put(ppgtt);
+err_unlock:
+ mutex_unlock(&dev_priv->drm.struct_mutex);
+
+ fake_file_free(dev_priv, file);
+ return err;
+}
+
static int igt_ggtt_fill(void *arg)
{
struct drm_i915_private *i915 = arg;
@@ -300,11 +392,49 @@ static int igt_ggtt_fill(void *arg)
return err;
}
+static int igt_ggtt_walk(void *arg)
+{
+ struct drm_i915_private *i915 = arg;
+ struct i915_ggtt *ggtt = &i915->ggtt;
+ u64 hole_start = U64_MAX, hole_end = 0, hole_size = 0;
+ u64 this_start, this_end;
+ struct drm_mm_node *node;
+ int err;
+
+ GEM_BUG_ON(ggtt->base.total & ~PAGE_MASK);
+
+ mutex_lock(&i915->drm.struct_mutex);
+ drm_mm_for_each_hole(node, &ggtt->base.mm, this_start, this_end) {
+ u64 this_size;
+
+ if (ggtt->base.mm.color_adjust)
+ ggtt->base. mm.color_adjust(node, 0,
+ &this_start, &this_end);
+
+ this_size = this_end - this_start;
+ if (this_size > hole_size) {
+ hole_size = this_size;
+ hole_start = this_start;
+ hole_end = this_end;
+ }
+ }
+ pr_info("Found GGTT hole [%llx, %llx], size %llx\n",
+ hole_start, hole_end, hole_size);
+ GEM_BUG_ON(hole_start >= hole_end);
+
+ err = walk_hole(i915, &ggtt->base, hole_start, hole_end);
+ mutex_unlock(&i915->drm.struct_mutex);
+
+ return err;
+}
+
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),
};
--
2.11.0
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