Exercise drm_mm_insert_node_in_range(), check that we only allocate from
the specified range.
Signed-off-by: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>
---
drivers/gpu/drm/drm_mm_selftests.h | 1 +
drivers/gpu/drm/test-drm_mm.c | 188 +++++++++++++++++++++++++++++++++++++
2 files changed, 189 insertions(+)
diff --git a/drivers/gpu/drm/drm_mm_selftests.h b/drivers/gpu/drm/drm_mm_selftests.h
index 97690bf5add3..4070123daffc 100644
--- a/drivers/gpu/drm/drm_mm_selftests.h
+++ b/drivers/gpu/drm/drm_mm_selftests.h
@@ -5,6 +5,7 @@
*
* Tests are executed in reverse order by igt/drm_mm
*/
+selftest(insert_range, igt_insert_range)
selftest(insert, igt_insert)
selftest(reserve, igt_reserve)
selftest(init, igt_init)
diff --git a/drivers/gpu/drm/test-drm_mm.c b/drivers/gpu/drm/test-drm_mm.c
index 679f7e703218..494a470e08f3 100644
--- a/drivers/gpu/drm/test-drm_mm.c
+++ b/drivers/gpu/drm/test-drm_mm.c
@@ -474,6 +474,194 @@ static int igt_insert(void *ignored)
return 0;
}
+static int __igt_insert_range(int count, u64 size, u64 start, u64 end)
+{
+ struct drm_mm mm;
+ struct drm_mm_node *nodes, *node, *next;
+ int n, start_n, end_n;
+ int ret, err;
+
+ /* Fill a range with lots of nodes, check it doesn't fail too early */
+ pr_debug("%s: count=%d, size=%llx, start=%llx, end=%llx\n",
+ __func__, count, size, start, end);
+
+ ret = -ENOMEM;
+ nodes = vzalloc(count * sizeof(*nodes));
+ if (!nodes)
+ goto err;
+
+ ret = -EINVAL;
+ drm_mm_init(&mm, 0, count * size);
+ if (!drm_mm_clean(&mm)) {
+ pr_err("mm not empty on creation\n");
+ goto out;
+ }
+
+ for (n = 0; n < count; n++) {
+ err = drm_mm_insert_node(&mm, &nodes[n], size, 0,
+ DRM_MM_SEARCH_DEFAULT);
+ if (err) {
+ pr_err("insert failed, step %d, start %llu\n",
+ n, nodes[n].start);
+ ret = err;
+ goto out;
+ }
+ }
+
+ /* Repeated use should then fail */
+ if (1) {
+ struct drm_mm_node tmp;
+
+ memset(&tmp, 0, sizeof(tmp));
+ if (!drm_mm_insert_node_in_range(&mm, &tmp,
+ size, 0,
+ start, end,
+ DRM_MM_SEARCH_DEFAULT)) {
+ drm_mm_remove_node(&tmp);
+ pr_err("impossible insert succeeded, step %d, start %llu\n",
+ n, tmp.start);
+ goto out;
+ }
+ }
+
+ n = div64_u64(start, size);
+ drm_mm_for_each_node_in_range(node, &mm, start, end) {
+ if (node->start > end) {
+ pr_err("node %d out of rangei [%d, %d]\n",
+ n,
+ (int)div64_u64(start, size),
+ (int)div64_u64(start + size - 1, size));
+ goto out;
+ }
+
+ if (node->start != n * size) {
+ pr_err("node %d out of order, expected start %llx, found %llx\n",
+ n, n * size, node->start);
+ goto out;
+ }
+
+ if (node->size != size) {
+ pr_err("node %d has wrong size, expected size %llx, found %llx\n",
+ n, size, node->size);
+ goto out;
+ }
+
+ if (node->hole_follows) {
+ pr_err("node %d is followed by a hole!\n", n);
+ goto out;
+ }
+
+ n++;
+ }
+
+ /* Remove one and reinsert, as the only hole it should refill itself */
+ start_n = div64_u64(start + size - 1, size);
+ end_n = div64_u64(end - size, size);
+ for (n = start_n; n <= end_n; n++) {
+ drm_mm_remove_node(&nodes[n]);
+ err = drm_mm_insert_node_in_range(&mm, &nodes[n], size, 0,
+ start, end,
+ DRM_MM_SEARCH_DEFAULT);
+ if (err) {
+ pr_err("reinsert failed, step %d\n", n);
+ ret = err;
+ goto out;
+ }
+
+ if (nodes[n].start != n * size) {
+ pr_err("reinsert node moved, step %d, expected %llx, found %llx\n",
+ n, n * size, nodes[n].start);
+ goto out;
+ }
+ }
+
+ /* Remove the entire block, reinsert (order will then be undefined) */
+ for (n = start_n; n <= end_n; n++)
+ drm_mm_remove_node(&nodes[n]);
+
+ for (n = start_n; n <= end_n; n++) {
+ err = drm_mm_insert_node_in_range(&mm, &nodes[n], size, 0,
+ start, end,
+ DRM_MM_SEARCH_DEFAULT);
+ if (err) {
+ pr_err("reinsert failed, step %d\n", n);
+ ret = err;
+ goto out;
+ }
+ }
+
+ n = div64_u64(start, size);
+ drm_mm_for_each_node_in_range(node, &mm, start, end) {
+ if (node->start > end) {
+ pr_err("node %d out of rangei [%d, %d]\n",
+ n,
+ (int)div64_u64(start, size),
+ (int)div64_u64(start + size - 1, size));
+ goto out;
+ }
+
+ if (node->start != n * size) {
+ pr_err("node %d out of order, expected start %llx, found %llx\n",
+ n, n * size, node->start);
+ goto out;
+ }
+
+ if (node->size != size) {
+ pr_err("node %d has wrong size, expected size %llx, found %llx\n",
+ n, size, node->size);
+ goto out;
+ }
+
+ if (node->hole_follows) {
+ pr_err("node %d is followed by a hole!\n", n);
+ goto out;
+ }
+
+ n++;
+ }
+
+ ret = 0;
+out:
+ list_for_each_entry_safe(node, next, &mm.head_node.node_list, node_list)
+ drm_mm_remove_node(node);
+ drm_mm_takedown(&mm);
+ vfree(nodes);
+err:
+ return ret;
+}
+
+static int igt_insert_range(void *ignored)
+{
+ const int max = 4096 * 8192;
+ int ret;
+
+ ret = __igt_insert_range(8192, 4096, 0, max);
+ if (ret)
+ return ret;
+
+ ret = __igt_insert_range(8192, 4096, 1, max);
+ if (ret)
+ return ret;
+
+ ret = __igt_insert_range(8192, 4096, 0, max - 1);
+ if (ret)
+ return ret;
+
+ ret = __igt_insert_range(8192, 4096, 0, max/2);
+ if (ret)
+ return ret;
+
+ ret = __igt_insert_range(8192, 4096, max/2, max);
+ if (ret)
+ return ret;
+
+ ret = __igt_insert_range(8192, 4096, max/4+1, 3*max/4-1);
+ if (ret)
+ return ret;
+
+ return 0;
+}
+
#include "drm_selftest.c"
static int __init test_drm_mm_init(void)
--
2.11.0
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