diff options
| -rw-r--r-- | tests/fbdev.c | 52 |
1 files changed, 50 insertions, 2 deletions
diff --git a/tests/fbdev.c b/tests/fbdev.c index 0b208bda..d6bc70e0 100644 --- a/tests/fbdev.c +++ b/tests/fbdev.c @@ -65,10 +65,13 @@ static void framebuffer_tests(int fd) { const int values[] = { 0, 0x55, 0xaa, 0xff }; struct fb_fix_screeninfo fix_info; - void * volatile map; - void * volatile buf; + unsigned char * volatile map; + unsigned char * volatile buf; + volatile size_t pagesize; igt_fixture { + long ret; + igt_require(ioctl(fd, FBIOGET_FSCREENINFO, &fix_info) == 0); igt_assert(fix_info.smem_len); @@ -78,6 +81,10 @@ static void framebuffer_tests(int fd) buf = malloc(fix_info.smem_len); igt_require(buf); + + ret = sysconf(_SC_PAGESIZE); + igt_require(ret != -1); + pagesize = ret; } igt_describe("Check read operations on framebuffer memory"); @@ -96,6 +103,47 @@ static void framebuffer_tests(int fd) } } + igt_describe("Check read operations on unaligned locations in framebuffer memory"); + igt_subtest("unaligned-read") { + 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, 0, fix_info.smem_len); + memset(&map[off], 0x55, len); + memset(buf, 0xff, fix_info.smem_len); + + ret = pread(fd, &buf[off], len, off); + igt_assert_f(ret == (ssize_t)len, + "pread failed, ret=%zd\n", ret); + + pos = memchr(buf, 0x55, fix_info.smem_len); + igt_assert_f(pos, "0x55 not found within read buffer\n"); + igt_assert_f(pos == &buf[off], + "0x55 found at pos %zu, expected %lld\n", + pos - buf, (long long)off); + + pos = memchr(&buf[off], 0xff, fix_info.smem_len - off); + igt_assert_f(pos, "0xff not found within read buffer\n"); + igt_assert_f(pos == &buf[off + len], + "0xff found at pos %zu, expected %lld\n", + pos - buf, (long long)(off + len)); + + pos = memchr(&buf[off + len], + 0x55, + fix_info.smem_len - (off + len)); + igt_assert_f(pos, + "found 0x55 at pos %zu, none expected\n", + pos - buf); + } + igt_fixture { free(buf); /* don't leave garbage on the screen */ |