igt/prime_vgem: Check for fence wait before gem_read()
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
diff --git a/tests/prime_vgem.c b/tests/prime_vgem.c
index a1541da..5bd13cd 100644
--- a/tests/prime_vgem.c
+++ b/tests/prime_vgem.c
@@ -58,6 +58,44 @@
gem_close(i915, handle);
}
+static void test_fence_read(int vgem, int i915)
+{
+ struct vgem_bo scratch;
+ uint32_t handle;
+ uint32_t *ptr;
+ uint32_t fence;
+ int dmabuf, i;
+
+ scratch.width = 1024;
+ scratch.height = 1024;
+ scratch.bpp = 32;
+ vgem_create(vgem, &scratch);
+
+ dmabuf = prime_handle_to_fd(vgem, scratch.handle);
+ handle = prime_fd_to_handle(i915, dmabuf);
+ close(dmabuf);
+
+ fence = vgem_fence_attach(vgem, &scratch, VGEM_FENCE_WRITE);
+
+ igt_fork(child, 1) {
+ for (i = 0; i < 1024; i++) {
+ uint32_t tmp;
+ gem_read(i915, handle, 4096*i, &tmp, sizeof(tmp));
+ igt_assert_eq(tmp, i);
+ }
+ gem_close(i915, handle);
+ }
+
+ ptr = vgem_mmap(vgem, &scratch, PROT_WRITE);
+ for (i = 0; i < 1024; i++)
+ ptr[1024*i] = i;
+ munmap(ptr, scratch.size);
+ vgem_fence_signal(vgem, fence);
+ gem_close(vgem, scratch.handle);
+
+ igt_waitchildren();
+}
+
static void test_write(int vgem, int i915)
{
struct vgem_bo scratch;
@@ -625,6 +663,9 @@
igt_require(vgem_has_fences(vgem));
}
+ igt_subtest("basic-fence-read")
+ test_fence_read(i915, vgem);
+
for (e = intel_execution_engines; e->name; e++) {
igt_subtest_f("%sfence-wait-%s",
e->exec_id == 0 ? "basic-" : "",