On 03/02/2022 13:32, Arunpravin wrote:
- add a test to ascertain that the critical functionalities
of the program is working fine
- add a timeout helper function
Signed-off-by: Arunpravin <Arunpravin.PaneerSelvam@xxxxxxx>
---
.../gpu/drm/selftests/drm_buddy_selftests.h | 1 +
drivers/gpu/drm/selftests/test-drm_buddy.c | 143 ++++++++++++++++++
2 files changed, 144 insertions(+)
diff --git a/drivers/gpu/drm/selftests/drm_buddy_selftests.h b/drivers/gpu/drm/selftests/drm_buddy_selftests.h
index b14f04a1de19..411d072cbfc5 100644
--- a/drivers/gpu/drm/selftests/drm_buddy_selftests.h
+++ b/drivers/gpu/drm/selftests/drm_buddy_selftests.h
@@ -11,3 +11,4 @@ selftest(buddy_alloc_limit, igt_buddy_alloc_limit)
selftest(buddy_alloc_range, igt_buddy_alloc_range)
selftest(buddy_alloc_optimistic, igt_buddy_alloc_optimistic)
selftest(buddy_alloc_pessimistic, igt_buddy_alloc_pessimistic)
+selftest(buddy_alloc_smoke, igt_buddy_alloc_smoke)
diff --git a/drivers/gpu/drm/selftests/test-drm_buddy.c b/drivers/gpu/drm/selftests/test-drm_buddy.c
index e97f583ed0cd..2074e8c050a4 100644
--- a/drivers/gpu/drm/selftests/test-drm_buddy.c
+++ b/drivers/gpu/drm/selftests/test-drm_buddy.c
@@ -7,6 +7,7 @@
#include <linux/module.h>
#include <linux/prime_numbers.h>
+#include <linux/sched/signal.h>
#include <drm/drm_buddy.h>
@@ -15,6 +16,9 @@
#define TESTS "drm_buddy_selftests.h"
#include "drm_selftest.h"
+#define IGT_TIMEOUT(name__) \
+ unsigned long name__ = jiffies + MAX_SCHEDULE_TIMEOUT
+
static unsigned int random_seed;
static inline u64 get_size(int order, u64 chunk_size)
@@ -22,6 +26,26 @@ static inline u64 get_size(int order, u64 chunk_size)
return (1 << order) * chunk_size;
}
+__printf(2, 3)
+static bool __igt_timeout(unsigned long timeout, const char *fmt, ...)
+{
+ va_list va;
+
+ if (!signal_pending(current)) {
+ cond_resched();
+ if (time_before(jiffies, timeout))
+ return false;
+ }
+
+ if (fmt) {
+ va_start(va, fmt);
+ vprintk(fmt, va);
+ va_end(va);
+ }
+
+ return true;
+}
+
static inline const char *yesno(bool v)
{
return v ? "yes" : "no";
@@ -314,6 +338,125 @@ static void igt_mm_config(u64 *size, u64 *chunk_size)
*size = (u64)s << 12;
}
+static int igt_buddy_alloc_smoke(void *arg)
+{
+ u64 mm_size, min_page_size, chunk_size, start = 0;
+ unsigned long flags = 0;
+ struct drm_buddy mm;
+ int *order;
+ int err, i;
+
+ DRM_RND_STATE(prng, random_seed);
+ IGT_TIMEOUT(end_time);
+
+ igt_mm_config(&mm_size, &chunk_size);
+
+ err = drm_buddy_init(&mm, mm_size, chunk_size);
+ if (err) {
+ pr_err("buddy_init failed(%d)\n", err);
+ return err;
+ }
+
+ order = drm_random_order(mm.max_order + 1, &prng);
+ if (!order)
+ goto out_fini;
+
+ for (i = 0; i <= mm.max_order; ++i) {
+ struct drm_buddy_block *block;
+ int max_order = order[i];
+ bool timeout = false;
+ LIST_HEAD(blocks);
+ u64 total, size;
+ LIST_HEAD(tmp);
+ int order;
+
+ err = igt_check_mm(&mm);
+ if (err) {
+ pr_err("pre-mm check failed, abort\n");
+ break;
+ }
+
+ order = max_order;
+ total = 0;
+
+ do {
+retry:
+ size = min_page_size = get_size(order, chunk_size);
+ err = drm_buddy_alloc_blocks(&mm, start, mm_size, size,
+ min_page_size, &tmp, flags);
+ if (err) {
+ if (err == -ENOMEM) {
+ pr_info("buddy_alloc hit -ENOMEM with order=%d\n",
+ order);
+ } else {
+ if (order--) {
+ err = 0;
+ goto retry;
+ }
+
+ pr_err("buddy_alloc with order=%d failed(%d)\n",
+ order, err);
+ }
+
+ break;
+ }
+
+ block = list_first_entry_or_null(&tmp,
+ struct drm_buddy_block,
+ link);
+ if (!block) {
+ pr_err("alloc_blocks has no blocks\n");
+ err = -EINVAL;
+ break;
+ }
+
+ list_del(&block->link);
+ list_add_tail(&block->link, &blocks);
Could just make this list_move_tail()? Elsewhere also.
Anyway,
Reviewed-by: Matthew Auld <matthew.auld@xxxxxxxxx>
+
+ if (drm_buddy_block_order(block) != order) {
+ pr_err("buddy_alloc order mismatch\n");
+ err = -EINVAL;
+ break;
+ }
+
+ total += drm_buddy_block_size(&mm, block);
+
+ if (__igt_timeout(end_time, NULL)) {
+ timeout = true;
+ break;
+ }
+ } while (total < mm.size);
+
+ if (!err)
+ err = igt_check_blocks(&mm, &blocks, total, false);
+
+ drm_buddy_free_list(&mm, &blocks);
+
+ if (!err) {
+ err = igt_check_mm(&mm);
+ if (err)
+ pr_err("post-mm check failed\n");
+ }
+
+ if (err || timeout)
+ break;
+
+ cond_resched();
+ }
+
+ if (err == -ENOMEM)
+ err = 0;
+
+ if (!err)
+ pr_info("%s - succeeded\n", __func__);
+
+ kfree(order);
+out_fini:
+ drm_buddy_fini(&mm);
+
+ return err;
+}
+
static int igt_buddy_alloc_pessimistic(void *arg)
{
u64 mm_size, size, min_page_size, start = 0;
