Mock testing to ensure we can create and lookup partial VMA.
Signed-off-by: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>
---
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 95c5db2b0881..7511f383868c 100644
--- a/drivers/gpu/drm/i915/selftests/i915_vma.c
+++ b/drivers/gpu/drm/i915/selftests/i915_vma.c
@@ -416,12 +416,191 @@ static int igt_vma_rotate(void *arg)
return err;
}
+static bool assert_partial(struct drm_i915_gem_object *obj,
+ struct i915_vma *vma,
+ unsigned long offset,
+ unsigned long size)
+{
+ struct sgt_iter sgt;
+ dma_addr_t dma;
+
+ for_each_sgt_dma(dma, sgt, vma->pages) {
+ dma_addr_t src;
+
+ if (!size) {
+ pr_err("Partial scattergather list too long\n");
+ return false;
+ }
+
+ src = i915_gem_object_get_dma_address(obj, offset);
+ if (src != dma) {
+ pr_err("DMA mismatch for partial page offset %lu\n",
+ offset);
+ return false;
+ }
+
+ offset++;
+ size--;
+ }
+
+ return true;
+}
+
+static int igt_vma_partial(void *arg)
+{
+ struct drm_i915_private *i915 = arg;
+ const unsigned int npages = 1021; /* prime! */
+ struct drm_i915_gem_object *obj;
+ unsigned int sz, offset, loop;
+ struct i915_vma *vma;
+ int err = -ENOMEM;
+
+ obj = i915_gem_object_create_internal(i915, npages*PAGE_SIZE);
+ if (IS_ERR(obj))
+ goto err;
+
+ for (loop = 0; loop <= 1; loop++) { /* exercise both create/lookup */
+ unsigned int count, nvma;
+
+ nvma = loop;
+ for_each_prime_number_from(sz, 1, npages) {
+ for_each_prime_number_from(offset, 0, npages - sz) {
+ struct i915_ggtt_view view;
+
+ view.type = I915_GGTT_VIEW_PARTIAL;
+ view.partial.offset_size =
+ offset << INTEL_PARTIAL_SIZE_BITS | (sz - 1);
+
+ if (sz == npages)
+ view.type = I915_GGTT_VIEW_NORMAL;
+
+ vma = i915_gem_obj_lookup_or_create_vma(obj, &i915->ggtt.base, &view);
+ if (IS_ERR(vma)) {
+ err = PTR_ERR(vma);
+ goto err_object;
+ }
+
+ if (!i915_vma_is_ggtt(vma)) {
+ pr_err("VMA is not in the GGTT!\n");
+ err = -EINVAL;
+ goto err_object;
+ }
+
+ err = i915_vma_pin(vma, 0, 0, PIN_GLOBAL);
+ if (err)
+ goto err_object;
+
+ if (vma->size != sz*PAGE_SIZE) {
+ pr_err("VMA is wrong size, expected %lu, found %llu\n",
+ sz*PAGE_SIZE, vma->size);
+ err = -EINVAL;
+ goto err_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 err_object;
+ }
+
+ if (view.type != I915_GGTT_VIEW_NORMAL) {
+ if (memcmp(&vma->ggtt_view, &view, sizeof(view))) {
+ pr_err("VMA mismatch upon creation!\n");
+ err = -EINVAL;
+ goto err_object;
+ }
+
+ if (vma->pages == obj->mm.pages) {
+ pr_err("VMA using unrotated object pages!\n");
+ err = -EINVAL;
+ goto err_object;
+ }
+ }
+
+ if (!assert_partial(obj, vma, offset, sz)) {
+ pr_err("Inconsistent partial pages for (offset=%d, size=%d)\n", offset, sz);
+ err = -EINVAL;
+ goto err_object;
+ }
+
+ i915_vma_unpin(vma);
+ nvma++;
+ }
+ }
+
+ count = loop;
+ list_for_each_entry(vma, &obj->vma_list, obj_link)
+ count++;
+ if (count != nvma) {
+ pr_err("All partial vma were not recorded on the obj->vma_list: found %u, expected %u\n",
+ count, nvma);
+ err = -EINVAL;
+ goto err_object;
+ }
+
+ /* Create a mapping for the entire object, just for extra fun */
+ vma = i915_gem_obj_lookup_or_create_vma(obj,
+ &i915->ggtt.base,
+ NULL);
+ if (IS_ERR(vma)) {
+ err = PTR_ERR(vma);
+ goto err_object;
+ }
+
+ if (!i915_vma_is_ggtt(vma)) {
+ pr_err("VMA is not in the GGTT!\n");
+ err = -EINVAL;
+ goto err_object;
+ }
+
+ err = i915_vma_pin(vma, 0, 0, PIN_GLOBAL);
+ if (err)
+ goto err_object;
+
+ if (vma->size != obj->base.size) {
+ pr_err("VMA is wrong size, expected %lu, found %llu\n",
+ sz*PAGE_SIZE, vma->size);
+ err = -EINVAL;
+ goto err_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 err_object;
+ }
+
+ if (vma->ggtt_view.type != I915_GGTT_VIEW_NORMAL) {
+ pr_err("Not the normal ggtt view! Found %d\n",
+ vma->ggtt_view.type);
+ err = -EINVAL;
+ goto err_object;
+ }
+
+ if (vma->pages != obj->mm.pages) {
+ pr_err("VMA not using object pages!\n");
+ err = -EINVAL;
+ goto err_object;
+ }
+
+ i915_vma_unpin(vma);
+ }
+
+err_object:
+ i915_gem_object_put(obj);
+err:
+ 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),
+ SUBTEST(igt_vma_partial),
};
struct drm_i915_private *i915;
int err;
--
2.11.0
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