igt/gem_userptr: Check read-only mappings

Setup a userptr object that only has a read-only mapping back to a file
store (memfd). Then attempt to write into that mapping using the GPU and
assert that those writes do not land (while also writing via a writable
userptr mapping into the same memfd to verify that the GPU is working!)

v2: Pull the random batch construction into a routine to avoid
duplication.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>

1 files changed, 2 insertions, 2 deletions

diff --git a/lib/ioctl_wrappers.h b/lib/ioctl_wrappers.h
index b966f72c..8e2cd380 100644
--- a/lib/ioctl_wrappers.h
+++ b/lib/ioctl_wrappers.h
@@ -133,8 +133,8 @@ struct local_i915_gem_userptr {
 #define LOCAL_I915_USERPTR_UNSYNCHRONIZED (1<<31)
 	uint32_t handle;
 };
-void gem_userptr(int fd, void *ptr, int size, int read_only, uint32_t flags, uint32_t *handle);
-int __gem_userptr(int fd, void *ptr, int size, int read_only, uint32_t flags, uint32_t *handle);
+void gem_userptr(int fd, void *ptr, uint64_t size, int read_only, uint32_t flags, uint32_t *handle);
+int __gem_userptr(int fd, void *ptr, uint64_t size, int read_only, uint32_t flags, uint32_t *handle);
 
 void gem_sw_finish(int fd, uint32_t handle);