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path: root/drivers/gpu/drm/selftests/test-drm_mm.c
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Diffstat (limited to 'drivers/gpu/drm/selftests/test-drm_mm.c')
-rw-r--r--drivers/gpu/drm/selftests/test-drm_mm.c71
1 files changed, 71 insertions, 0 deletions
diff --git a/drivers/gpu/drm/selftests/test-drm_mm.c b/drivers/gpu/drm/selftests/test-drm_mm.c
index 933af1c25387..fbed2c90fd51 100644
--- a/drivers/gpu/drm/selftests/test-drm_mm.c
+++ b/drivers/gpu/drm/selftests/test-drm_mm.c
@@ -1825,6 +1825,77 @@ err:
return ret;
}
+static int __igt_once(unsigned int mode)
+{
+ struct drm_mm mm;
+ struct drm_mm_node rsvd_lo, rsvd_hi, node;
+ int err;
+
+ drm_mm_init(&mm, 0, 7);
+
+ memset(&rsvd_lo, 0, sizeof(rsvd_lo));
+ rsvd_lo.start = 1;
+ rsvd_lo.size = 1;
+ err = drm_mm_reserve_node(&mm, &rsvd_lo);
+ if (err) {
+ pr_err("Could not reserve low node\n");
+ goto err;
+ }
+
+ memset(&rsvd_hi, 0, sizeof(rsvd_hi));
+ rsvd_hi.start = 5;
+ rsvd_hi.size = 1;
+ err = drm_mm_reserve_node(&mm, &rsvd_hi);
+ if (err) {
+ pr_err("Could not reserve low node\n");
+ goto err_lo;
+ }
+
+ if (!drm_mm_hole_follows(&rsvd_lo) || !drm_mm_hole_follows(&rsvd_hi)) {
+ pr_err("Expected a hole after lo and high nodes!\n");
+ err = -EINVAL;
+ goto err_hi;
+ }
+
+ memset(&node, 0, sizeof(node));
+ err = drm_mm_insert_node_generic(&mm, &node,
+ 2, 0, 0,
+ mode | DRM_MM_INSERT_ONCE);
+ if (!err) {
+ pr_err("Unexpectedly inserted the node into the wrong hole: node.start=%llx\n",
+ node.start);
+ err = -EINVAL;
+ goto err_node;
+ }
+
+ err = drm_mm_insert_node_generic(&mm, &node, 2, 0, 0, mode);
+ if (err) {
+ pr_err("Could not insert the node into the available hole!\n");
+ err = -EINVAL;
+ goto err_hi;
+ }
+
+err_node:
+ drm_mm_remove_node(&node);
+err_hi:
+ drm_mm_remove_node(&rsvd_hi);
+err_lo:
+ drm_mm_remove_node(&rsvd_lo);
+err:
+ drm_mm_takedown(&mm);
+ return err;
+}
+
+static int igt_lowest(void *ignored)
+{
+ return __igt_once(DRM_MM_INSERT_LOW);
+}
+
+static int igt_highest(void *ignored)
+{
+ return __igt_once(DRM_MM_INSERT_HIGH);
+}
+
static void separate_adjacent_colors(const struct drm_mm_node *node,
unsigned long color,
u64 *start,