Simple first test to just exercise initialisation of struct drm_mm.
Signed-off-by: Chris Wilson chris@chris-wilson.co.uk --- drivers/gpu/drm/drm_mm_selftests.h | 1 + drivers/gpu/drm/test-drm_mm.c | 41 ++++++++++++++++++++++++++++++++++++++ 2 files changed, 42 insertions(+)
diff --git a/drivers/gpu/drm/drm_mm_selftests.h b/drivers/gpu/drm/drm_mm_selftests.h index 0a2e98a33ba0..8a9166f4626f 100644 --- a/drivers/gpu/drm/drm_mm_selftests.h +++ b/drivers/gpu/drm/drm_mm_selftests.h @@ -5,4 +5,5 @@ * * Tests are executed in reverse order by igt/drm_mm */ +selftest(init, igt_init) selftest(sanitycheck, igt_sanitycheck) /* keep last */ diff --git a/drivers/gpu/drm/test-drm_mm.c b/drivers/gpu/drm/test-drm_mm.c index 049f36b38868..d89615987303 100644 --- a/drivers/gpu/drm/test-drm_mm.c +++ b/drivers/gpu/drm/test-drm_mm.c @@ -20,6 +20,47 @@ static int igt_sanitycheck(void *ignored) return 0; }
+static int igt_init(void *ignored) +{ + struct drm_mm mm; + struct drm_mm_node *hole; + struct drm_mm_node tmp; + u64 start, end; + int ret = -EINVAL; + + memset(&mm, 0xff, sizeof(mm)); + drm_mm_init(&mm, 0, 4096); + if (!drm_mm_clean(&mm)) { + pr_err("mm not empty on creation\n"); + goto out; + } + + drm_mm_for_each_hole(hole, &mm, start, end) { + if (start != 0 || end != 4096) { + pr_err("empty mm has incorrect hole, found (%llx, %llx), expect (%llx, %llx)\n", + start, end, + 0ull, 4096ull); + goto out; + } + } + + memset(&tmp, 0, sizeof(tmp)); + tmp.start = 0; + tmp.size = 4096; + ret = drm_mm_reserve_node(&mm, &tmp); + if (ret) { + pr_err("failed to reserve whole drm_mm\n"); + goto out; + } + drm_mm_remove_node(&tmp); + +out: + if (ret) + drm_mm_debug_table(&mm, __func__); + drm_mm_takedown(&mm); + return ret; +} + #include "drm_selftest.c"
static int __init test_drm_mm_init(void)