[PATCH 19/37] drm: kselftest for drm_mm and color eviction
Chris Wilson
chris at chris-wilson.co.uk
Wed Dec 14 21:52:03 UTC 2016
Check that after applying the driver's color adjustment, 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 | 157 +++++++++++++++++++++++++++
2 files changed, 158 insertions(+)
diff --git a/drivers/gpu/drm/selftests/drm_mm_selftests.h b/drivers/gpu/drm/selftests/drm_mm_selftests.h
index ff44f39a1826..0a3a7e32e5f7 100644
--- a/drivers/gpu/drm/selftests/drm_mm_selftests.h
+++ b/drivers/gpu/drm/selftests/drm_mm_selftests.h
@@ -19,3 +19,4 @@ selftest(evict, igt_evict)
selftest(evict_range, igt_evict_range)
selftest(topdown, igt_topdown)
selftest(color, igt_color)
+selftest(color_evict, igt_color_evict)
diff --git a/drivers/gpu/drm/selftests/test-drm_mm.c b/drivers/gpu/drm/selftests/test-drm_mm.c
index 52807e9760a2..0d1533c3e887 100644
--- a/drivers/gpu/drm/selftests/test-drm_mm.c
+++ b/drivers/gpu/drm/selftests/test-drm_mm.c
@@ -1722,6 +1722,163 @@ static int igt_color(void *ignored)
return ret;
}
+static int igt_color_evict(void *ignored)
+{
+ RND_STATE(prng, random_seed);
+ const unsigned int total_size = min(8192u, max_iterations);
+ unsigned long color = 0;
+ struct drm_mm mm;
+ struct evict_node *nodes;
+ struct drm_mm_node *node, *next;
+ unsigned int *order, n;
+ int ret, err;
+
+ ret = -ENOMEM;
+ nodes = vzalloc(total_size * sizeof(*nodes));
+ if (!nodes)
+ goto err;
+
+ order = drm_random_order(total_size, &prng);
+ 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++) {
+ 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 <= total_size; n <<= 1) {
+ const unsigned int nsize = total_size - 1;
+ unsigned long c = color++;
+ LIST_HEAD(evict_list);
+ struct evict_node *e;
+ struct drm_mm_node tmp;
+
+ drm_mm_init_scan(&mm, nsize, n, c);
+ drm_random_reorder(order, total_size, &prng);
+ err = evict_nodes(&mm,
+ nodes, order, total_size,
+ &evict_list);
+ if (err)
+ goto out;
+
+ memset(&tmp, 0, sizeof(tmp));
+ err = drm_mm_insert_node_generic(&mm, &tmp, nsize, n, c,
+ DRM_MM_SEARCH_DEFAULT,
+ DRM_MM_CREATE_DEFAULT);
+ if (err) {
+ pr_err("Failed to insert into eviction hole: size=%d, align=%d, color=%ld, err=%d\n",
+ nsize, n, c, err);
+ show_scan(&mm);
+ show_holes(&mm, 3);
+ ret = err;
+ goto out;
+ }
+
+ if (colors_abutt(&tmp))
+ err = -EINVAL;
+
+ if (lower_32_bits(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, lower_32_bits(tmp.start) % n, tmp.start);
+ err = -EINVAL;
+ }
+
+ drm_mm_remove_node(&tmp);
+ if (err)
+ goto out;
+
+ 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, min(total_size, max_prime)) {
+ LIST_HEAD(evict_list);
+ unsigned long c = color++;
+ struct evict_node *e;
+ struct drm_mm_node tmp;
+ unsigned int nsize = (total_size - n + 1) / 2;
+
+ drm_mm_init_scan(&mm, nsize, n, c);
+ drm_random_reorder(order, total_size, &prng);
+ err = evict_nodes(&mm,
+ nodes, order, total_size,
+ &evict_list);
+ if (err)
+ goto out;
+
+ memset(&tmp, 0, sizeof(tmp));
+ err = drm_mm_insert_node_generic(&mm, &tmp, nsize, n, c,
+ DRM_MM_SEARCH_DEFAULT,
+ DRM_MM_CREATE_DEFAULT);
+ if (err) {
+ pr_err("Failed to insert into eviction hole: size=%d, align=%d (prime), color=%ld, err=%d\n",
+ nsize, n, c, err);
+ show_scan(&mm);
+ show_holes(&mm, 3);
+ ret = err;
+ goto out;
+ }
+ drm_mm_remove_node(&tmp);
+
+ if (lower_32_bits(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, lower_32_bits(tmp.start) % n, tmp.start);
+ 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;
+ }
+
+ 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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