[i-g-t,v2,08/17] lib: Add helper kmstest_dumb_map_buffer

Commit Message

Tomeu Vizoso March 8, 2016, 2:51 p.m. UTC

Which basically just calls DRM_IOCTL_MODE_MAP_DUMB and is similar to
gem_mmap__gtt().

Signed-off-by: Tomeu Vizoso <[e-mail]>
---

Changes in v2:
- Add helper kmstest_dumb_map_buffer as suggested by Daniel Vetter

 lib/igt_kms.c | 16 ++++++++++++++++
 lib/igt_kms.h |  3 +++
 2 files changed, 19 insertions(+)

Patch

diff --git a/lib/igt_kms.c b/lib/igt_kms.c
index ee375bffc5e2..a98c22a7f4dc 100644
--- a/lib/igt_kms.c
+++ b/lib/igt_kms.c
@@ -345,6 +345,22 @@  uint32_t kmstest_dumb_create(int fd, int width, int height, int bpp,
 	return create.handle;
 }
 
+void *kmstest_dumb_map_buffer(int fd, uint32_t handle, uint64_t size,
+			      unsigned prot)
+{
+	struct drm_mode_map_dumb arg = {};
+	void *ptr;
+
+	arg.handle = handle;
+
+	do_ioctl(fd, DRM_IOCTL_MODE_MAP_DUMB, &arg);
+
+	ptr = mmap(0, size, prot, MAP_SHARED, fd, arg.offset);
+	igt_assert(ptr != MAP_FAILED);
+
+	return ptr;
+}
+
 /*
  * Returns: the previous mode, or KD_GRAPHICS if no /dev/tty0 was
  * found and nothing was done.
diff --git a/lib/igt_kms.h b/lib/igt_kms.h
index 45df8b556daf..af794cf2c916 100644
--- a/lib/igt_kms.h
+++ b/lib/igt_kms.h
@@ -158,6 +158,9 @@  uint32_t kmstest_find_crtc_for_connector(int fd, drmModeRes *res,
 uint32_t kmstest_dumb_create(int fd, int width, int height, int bpp,
 			     unsigned *stride, unsigned *size);
 
+void *kmstest_dumb_map_buffer(int fd, uint32_t handle, uint64_t size,
+			      unsigned prot);
+
 /*
  * A small modeset API
  */