[PATCH 19/34] drm: kselftest for drm_mm and restricted color eviction
Chris Wilson
chris at chris-wilson.co.uk
Mon Dec 12 11:53:35 UTC 2016
Check that after applying the driver's color adjustment, restricted
eviction scanning find a suitable hole.
Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>
---
drivers/gpu/drm/selftests/drm_mm_selftests.h | 1 +
drivers/gpu/drm/selftests/test-drm_mm.c | 205 +++++++++++++++++++++++++++
2 files changed, 206 insertions(+)
diff --git a/drivers/gpu/drm/selftests/drm_mm_selftests.h b/drivers/gpu/drm/selftests/drm_mm_selftests.h
index cdb7c72ecadf..fb9d704e7943 100644
--- a/drivers/gpu/drm/selftests/drm_mm_selftests.h
+++ b/drivers/gpu/drm/selftests/drm_mm_selftests.h
@@ -5,6 +5,7 @@
*
* Tests are executed in reverse order by igt/drm_mm
*/
+selftest(color_evict_range, igt_color_evict_range)
selftest(color_evict, igt_color_evict)
selftest(color, igt_color)
selftest(topdown_align, igt_topdown_align)
diff --git a/drivers/gpu/drm/selftests/test-drm_mm.c b/drivers/gpu/drm/selftests/test-drm_mm.c
index 663db5408b3a..02f10d9d1396 100644
--- a/drivers/gpu/drm/selftests/test-drm_mm.c
+++ b/drivers/gpu/drm/selftests/test-drm_mm.c
@@ -1784,6 +1784,211 @@ static int igt_color_evict(void *ignored)
return ret;
}
+static int igt_color_evict_range(void *ignored)
+{
+ u32 lcg_state = random_seed;
+ const int total_size = 8192;
+ const int range_size = total_size / 2;
+ const int range_start = total_size / 4;
+ const int range_end = range_start + range_size;
+ unsigned long color = 0;
+ struct drm_mm mm;
+ struct evict_node {
+ struct drm_mm_node node;
+ struct list_head link;
+ } *nodes;
+ struct drm_mm_node *node, *next;
+ int *order, n, m;
+ int ret;
+
+ ret = -ENOMEM;
+ nodes = vzalloc(total_size * sizeof(*nodes));
+ if (!nodes)
+ goto err;
+
+ order = drm_random_order(total_size, &lcg_state);
+ if (!order)
+ goto err_nodes;
+
+ ret = -EINVAL;
+ drm_mm_init(&mm, 0, 2*total_size - 1);
+ mm.color_adjust = no_color_touching;
+ for (n = 0; n < total_size; n++) {
+ int err;
+
+ err = drm_mm_insert_node_generic(&mm, &nodes[n].node,
+ 1, 0, color++,
+ DRM_MM_SEARCH_DEFAULT,
+ DRM_MM_CREATE_DEFAULT);
+ if (err) {
+ pr_err("insert failed, step %d\n", n);
+ ret = err;
+ goto out;
+ }
+ }
+
+ for (n = 1; n <= range_size; n <<= 1) {
+ const int nsize = range_size / 2;
+ unsigned int c = color++;
+ LIST_HEAD(evict_list);
+ struct evict_node *e, *en;
+ struct drm_mm_node tmp;
+ int err;
+
+ drm_mm_init_scan_with_range(&mm, nsize, n, c,
+ range_start, range_end);
+ drm_random_reorder(order, total_size, &lcg_state);
+ for (m = 0; m < total_size; m++) {
+ e = &nodes[order[m]];
+ list_add(&e->link, &evict_list);
+ if (drm_mm_scan_add_block(&e->node))
+ break;
+ }
+ list_for_each_entry_safe(e, en, &evict_list, link) {
+ if (!drm_mm_scan_remove_block(&e->node))
+ list_del(&e->link);
+ }
+ if (list_empty(&evict_list)) {
+ pr_err("Failed to find eviction: size=%d, align=%d, color=%d\n",
+ nsize, n, c);
+ goto out;
+ }
+
+ list_for_each_entry(e, &evict_list, link)
+ drm_mm_remove_node(&e->node);
+
+ memset(&tmp, 0, sizeof(tmp));
+ err = drm_mm_insert_node_in_range_generic(&mm, &tmp, nsize, n, c,
+ range_start, range_end,
+ DRM_MM_SEARCH_DEFAULT,
+ DRM_MM_CREATE_DEFAULT);
+ if (err) {
+ pr_err("Failed to insert into eviction hole: size=%d, align=%d, color=%d, err=%d\n",
+ nsize, n, c, err);
+ show_scan(&mm);
+ show_holes(&mm, 3);
+ ret = err;
+ goto out;
+ }
+
+ if ((int)tmp.start % n || tmp.size != nsize) {
+ pr_err("Inserted did not fit the eviction hole: size=%lld [%d], align=%d [rem=%d], start=%llx\n",
+ tmp.size, nsize, n, (int)tmp.start % n, tmp.start);
+
+ drm_mm_remove_node(&tmp);
+ goto out;
+ }
+
+ if (!tmp.hole_follows &&
+ list_next_entry(&tmp, node_list)->allocated) {
+ pr_err("colors abutt; %ld [%llx + %llx] is next to %ld [%llx + %llx]!\n",
+ tmp.color, tmp.start, tmp.size,
+ list_next_entry(&tmp, node_list)->color,
+ list_next_entry(&tmp, node_list)->start,
+ list_next_entry(&tmp, node_list)->size);
+ goto out;
+ }
+
+ drm_mm_remove_node(&tmp);
+ list_for_each_entry(e, &evict_list, link) {
+ err = drm_mm_reserve_node(&mm, &e->node);
+ if (err) {
+ pr_err("Failed to reinsert node after eviction: start=%llx\n",
+ e->node.start);
+ ret = err;
+ goto out;
+ }
+ }
+ }
+
+ drm_for_each_prime(n, range_size) {
+ LIST_HEAD(evict_list);
+ unsigned int c = color++;
+ struct evict_node *e, *en;
+ struct drm_mm_node tmp;
+ int nsize = (range_size - n + 1) / 2;
+ int err;
+
+ drm_mm_init_scan_with_range(&mm, nsize, n, c,
+ range_start, range_end);
+ drm_random_reorder(order, total_size, &lcg_state);
+ for (m = 0; m < total_size; m++) {
+ e = &nodes[order[m]];
+ list_add(&e->link, &evict_list);
+ if (drm_mm_scan_add_block(&e->node))
+ break;
+ }
+ list_for_each_entry_safe(e, en, &evict_list, link) {
+ if (!drm_mm_scan_remove_block(&e->node))
+ list_del(&e->link);
+ }
+ if (list_empty(&evict_list)) {
+ pr_err("Failed to find eviction: size=%d, align=%d (prime), color=%d\n",
+ nsize, n, c);
+ goto out;
+ }
+
+ list_for_each_entry(e, &evict_list, link)
+ drm_mm_remove_node(&e->node);
+
+ memset(&tmp, 0, sizeof(tmp));
+ err = drm_mm_insert_node_in_range_generic(&mm, &tmp, nsize, n, c,
+ range_start, range_end,
+ DRM_MM_SEARCH_DEFAULT,
+ DRM_MM_CREATE_DEFAULT);
+ if (err) {
+ pr_err("Failed to insert into eviction hole: size=%d, align=%d (prime), color=%d, err=%d\n",
+ nsize, n, c, err);
+ show_scan(&mm);
+ show_holes(&mm, 3);
+ ret = err;
+ goto out;
+ }
+
+ if ((int)tmp.start % n || tmp.size != nsize) {
+ pr_err("Inserted did not fit the eviction hole: size=%lld [%d], align=%d [rem=%d] (prime), start=%llx\n",
+ tmp.size, nsize, n, (int)tmp.start % n, tmp.start);
+
+ drm_mm_remove_node(&tmp);
+ goto out;
+ }
+
+ if (!tmp.hole_follows &&
+ list_next_entry(&tmp, node_list)->allocated) {
+ pr_err("colors abutt; %ld [%llx + %llx] is next to %ld [%llx + %llx]!\n",
+ tmp.color, tmp.start, tmp.size,
+ list_next_entry(&tmp, node_list)->color,
+ list_next_entry(&tmp, node_list)->start,
+ list_next_entry(&tmp, node_list)->size);
+ goto out;
+ }
+
+ drm_mm_remove_node(&tmp);
+ list_for_each_entry(e, &evict_list, link) {
+ err = drm_mm_reserve_node(&mm, &e->node);
+ if (err) {
+ pr_err("Failed to reinsert node after eviction: start=%llx\n",
+ e->node.start);
+ ret = err;
+ goto out;
+ }
+ }
+ }
+
+ ret = 0;
+out:
+ if (ret)
+ drm_mm_debug_table(&mm, __func__);
+ drm_mm_for_each_node_safe(node, next, &mm)
+ drm_mm_remove_node(node);
+ drm_mm_takedown(&mm);
+ kfree(order);
+err_nodes:
+ vfree(nodes);
+err:
+ return ret;
+}
+
#include "drm_selftest.c"
static int __init test_drm_mm_init(void)
--
2.11.0
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