igt: Check the physical swizzle status

The kernel tries to hide L-shaped memory with asymmetric swizzling from
userspace by reporting lies through the get-tiling interface. Check for
these lies by comparing the reported swizzle with the actual swizzle,
and only run swizzling tests where we know the underlying physical
swizzling.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>

1 files changed, 1 insertions, 1 deletions

diff --git a/lib/ioctl_wrappers.h b/lib/ioctl_wrappers.h
index 42dc3cb7..465f760b 100644
--- a/lib/ioctl_wrappers.h
+++ b/lib/ioctl_wrappers.h
@@ -53,7 +53,7 @@ drm_intel_bo * gem_handle_to_libdrm_bo(drm_intel_bufmgr *bufmgr, int fd,
 /* ioctl_wrappers.c:
  *
  * ioctl wrappers and similar stuff for bare metal testing */
-void gem_get_tiling(int fd, uint32_t handle, uint32_t *tiling, uint32_t *swizzle);
+bool gem_get_tiling(int fd, uint32_t handle, uint32_t *tiling, uint32_t *swizzle);
 void gem_set_tiling(int fd, uint32_t handle, uint32_t tiling, uint32_t stride);
 int __gem_set_tiling(int fd, uint32_t handle, uint32_t tiling, uint32_t stride);