diff options
| author | Thomas Zimmermann <tzimmermann@suse.de> | 2020-11-20 11:52:15 +0100 |
|---|---|---|
| committer | Chris Wilson <chris@chris-wilson.co.uk> | 2020-11-23 12:30:17 +0000 |
| commit | 1bdb714a49676c1cac14784e91950d6356c680c2 (patch) | |
| tree | 74803b975c9ae96d5a7ff105db690ce80ce4d0c9 /tests/fbdev.c | |
| parent | b3b32e10057a05a6e0b0845453179e25228bd018 (diff) | |
tests/fbdev: Add tests for unaligned writes on framebuffer memory
The tests for unaligned writes start and stop writing within pages.
v6:
* remove test from fast-feedback.testlist
v4:
* replace igt_require() by igt_assert() in "unaligned-write" (Petri)
* clarify error message about framebuffer size (Petri)
* add unaligned-write test to CI
v3:
* put igt_describe() before igt_subtest() (Petri)
Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Diffstat (limited to 'tests/fbdev.c')
| -rw-r--r-- | tests/fbdev.c | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/tests/fbdev.c b/tests/fbdev.c index f6e2a091..629e893a 100644 --- a/tests/fbdev.c +++ b/tests/fbdev.c @@ -160,6 +160,47 @@ static void framebuffer_tests(int fd) } } + igt_describe("Check write operations on unaligned locations in framebuffer memory"); + igt_subtest("unaligned-write") { + const unsigned char *pos; + ssize_t ret; + size_t len; + off_t off; + + off = pagesize + (pagesize >> 2); /* 1.25 * pagesize */ + len = (pagesize << 2) + (pagesize >> 1); /* 4.5 * pagesize */ + igt_require_f(off + len < fix_info.smem_len, + "framebuffer too small to test\n"); + + /* read at unaligned location and compare */ + memset(map, 0xff, fix_info.smem_len); + memset(buf, 0, fix_info.smem_len); + memset(&buf[off], 0x55, len); + + ret = pwrite(fd, &buf[off], len, off); + igt_assert_f(ret == (ssize_t)len, + "pwrite failed, ret=%zd\n", ret); + + pos = memchr(map, 0x55, fix_info.smem_len); + igt_assert_f(pos, "0x55 not found within framebuffer\n"); + igt_assert_f(pos == &map[off], + "0x55 found at pos %zu, expected %lld\n", + pos - map, (long long)off); + + pos = memchr(&map[off], 0xff, fix_info.smem_len - off); + igt_assert_f(pos, "0xff not found within framebuffer\n"); + igt_assert_f(pos == &map[off + len], + "0xff found at pos %zu, expected %lld\n", + pos - map, (long long)(off + len)); + + pos = memchr(&map[off + len], + 0x55, + fix_info.smem_len - (off + len)); + igt_assert_f(pos, + "found 0x55 at pos %zu, none expected\n", + pos - map); + } + igt_fixture { free(buf); /* don't leave garbage on the screen */ |