Commit c1b702c9 authored by Chris Wilson's avatar Chris Wilson Committed by Daniel Vetter

drm: kselftest for drm_mm and color eviction

Check that after applying the driver's color adjustment, eviction
scanning finds a suitable hole.
Signed-off-by: default avatarChris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: default avatarJoonas Lahtinen <joonas.lahtinen@linux.intel.com>
Signed-off-by: default avatarDaniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/20161222083641.2691-19-chris@chris-wilson.co.uk
parent 4c2ba55b
...@@ -19,3 +19,4 @@ selftest(evict, igt_evict) ...@@ -19,3 +19,4 @@ selftest(evict, igt_evict)
selftest(evict_range, igt_evict_range) selftest(evict_range, igt_evict_range)
selftest(topdown, igt_topdown) selftest(topdown, igt_topdown)
selftest(color, igt_color) selftest(color, igt_color)
selftest(color_evict, igt_color_evict)
...@@ -1854,6 +1854,162 @@ static int igt_color(void *ignored) ...@@ -1854,6 +1854,162 @@ static int igt_color(void *ignored)
return ret; return ret;
} }
static int evict_color(struct drm_mm *mm,
struct evict_node *nodes,
unsigned int *order,
unsigned int count,
unsigned int size,
unsigned int alignment,
unsigned long color,
const struct insert_mode *mode)
{
LIST_HEAD(evict_list);
struct evict_node *e;
struct drm_mm_node tmp;
int err;
drm_mm_init_scan(mm, size, alignment, color);
if (!evict_nodes(mm,
nodes, order, count,
&evict_list))
return -EINVAL;
memset(&tmp, 0, sizeof(tmp));
err = drm_mm_insert_node_generic(mm, &tmp, size, alignment, color,
mode->search_flags,
mode->create_flags);
if (err) {
pr_err("Failed to insert into eviction hole: size=%d, align=%d, color=%lu, err=%d\n",
size, alignment, color, err);
show_scan(mm);
show_holes(mm, 3);
return err;
}
if (colors_abutt(&tmp))
err = -EINVAL;
if (!assert_node(&tmp, mm, size, alignment, color)) {
pr_err("Inserted did not fit the eviction hole: size=%lld [%d], align=%d [rem=%lld], start=%llx\n",
tmp.size, size,
alignment, misalignment(&tmp, alignment), tmp.start);
err = -EINVAL;
}
drm_mm_remove_node(&tmp);
if (err)
return err;
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);
return err;
}
}
return 0;
}
static int igt_color_evict(void *ignored)
{
DRM_RND_STATE(prng, random_seed);
const unsigned int total_size = min(8192u, max_iterations);
const struct insert_mode *mode;
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;
/* Check that the drm_mm_scan also honours color adjustment when
* choosing its victims to create a hole. Our color_adjust does not
* allow two nodes to be placed together without an intervening hole
* enlarging the set of victims that must be evicted.
*/
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 = separate_adjacent_colors;
for (n = 0; n < total_size; n++) {
if (!expect_insert(&mm, &nodes[n].node,
1, 0, color++,
&insert_modes[0])) {
pr_err("insert failed, step %d\n", n);
goto out;
}
}
for (mode = evict_modes; mode->name; mode++) {
for (n = 1; n <= total_size; n <<= 1) {
drm_random_reorder(order, total_size, &prng);
err = evict_color(&mm,
nodes, order, total_size,
n, 1, color++,
mode);
if (err) {
pr_err("%s evict_color(size=%u) failed\n",
mode->name, n);
goto out;
}
}
for (n = 1; n < total_size; n <<= 1) {
drm_random_reorder(order, total_size, &prng);
err = evict_color(&mm,
nodes, order, total_size,
total_size/2, n, color++,
mode);
if (err) {
pr_err("%s evict_color(size=%u, alignment=%u) failed\n",
mode->name, total_size/2, n);
goto out;
}
}
for_each_prime_number_from(n, 1, min(total_size, max_prime)) {
unsigned int nsize = (total_size - n + 1) / 2;
DRM_MM_BUG_ON(!nsize);
drm_random_reorder(order, total_size, &prng);
err = evict_color(&mm,
nodes, order, total_size,
nsize, n, color++,
mode);
if (err) {
pr_err("%s evict_color(size=%u, alignment=%u) failed\n",
mode->name, nsize, n);
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" #include "drm_selftest.c"
static int __init test_drm_mm_init(void) static int __init test_drm_mm_init(void)
......
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