[igt-dev] [RFC 4/4] tests/i915/prime_mmap: Add WC correctness test

[Antonio Argenziano]

Signed-off-by: Antonio Argenziano <antonio.argenziano at intel.com>
---
 tests/prime_mmap.c | 36 ++++++++++++++++++++++++++++++++++--
 1 file changed, 34 insertions(+), 2 deletions(-)

diff --git a/tests/prime_mmap.c b/tests/prime_mmap.c
index fc985784..d3833f91 100644
--- a/tests/prime_mmap.c
+++ b/tests/prime_mmap.c
@@ -73,7 +73,7 @@ fill_bo_cpu(char *ptr)
 }
 
 static void
-test_correct(void)
+test_correct_gtt(void)
 {
 	int dma_buf_fd;
 	char *ptr1, *ptr2;
@@ -101,6 +101,37 @@ test_correct(void)
 	gem_close(fd, handle);
 }
 
+static void
+test_correct_wc(void)
+{
+	int dma_buf_fd;
+	char *ptr1, *ptr2;
+	uint32_t handle;
+
+	gem_require_mmap_wc(fd);
+
+	handle = gem_create(fd, BO_SIZE);
+	fill_bo(handle, BO_SIZE);
+
+	dma_buf_fd = prime_handle_to_fd(fd, handle);
+	igt_assert(errno == 0);
+
+	/* Check correctness vs WC mapping */
+	ptr1 = gem_mmap__wc(fd, handle, 0, BO_SIZE, PROT_READ);
+	ptr2 = mmap(NULL, BO_SIZE, PROT_READ, MAP_SHARED, dma_buf_fd, 0);
+	igt_assert(ptr1 != MAP_FAILED);
+	igt_assert(ptr2 != MAP_FAILED);
+	igt_assert(memcmp(ptr1, ptr2, BO_SIZE) == 0);
+
+	/* Check pattern correctness */
+	igt_assert(memcmp(ptr2, pattern, sizeof(pattern)) == 0);
+
+	munmap(ptr1, BO_SIZE);
+	munmap(ptr2, BO_SIZE);
+	close(dma_buf_fd);
+	gem_close(fd, handle);
+}
+
 static void
 test_map_unmap(void)
 {
@@ -502,7 +533,8 @@ igt_main
 		const char *name;
 		void (*fn)(void);
 	} tests[] = {
-		{ "test_correct", test_correct },
+		{ "test_correct_gtt", test_correct_gtt },
+		{ "test_correct_wc", test_correct_wc },
 		{ "test_map_unmap", test_map_unmap },
 		{ "test_reprime", test_reprime },
 		{ "test_forked", test_forked },
-- 
2.20.1