[igt-dev] [PATCH i-g-t v3] tests/kms_prime: Create the exporting BO with smem

[Ramalingam C]

On i915, to avail the dmabuf, the sharing object needs to migratable
into smem. So if the shared object is lmem, then it needs to have the
smem as second placement option.

Currently kms_prime sharing the dumb buffer between the devices.
But dumb buffer can't have the placements and resides at lmem for the
dgfx. Hence to meet the i915 expectation for dgfx, we create the BO
using the gem_create with smem as second placement option.

v2: Used gem_mmap__device_coherent for mmaped ptr (Ashutosh)
v3: dumb buffer ioctls are used for non i915 drivers

Signed-off-by: Ramalingam C <ramalingam.c at intel.com>
Reviewed-by: Ashutosh Dixit <ashutosh.dixit at intel.com>
Reviewed-by: Michael J. Ruhl <michael.j.ruhl at intel.com>
---
 tests/kms_prime.c | 33 +++++++++++++++++++++------------
 1 file changed, 21 insertions(+), 12 deletions(-)

diff --git a/tests/kms_prime.c b/tests/kms_prime.c
index 2e20c58bc16e..5cdb559778b3 100644
--- a/tests/kms_prime.c
+++ b/tests/kms_prime.c
@@ -100,18 +100,27 @@ static void prepare_scratch(int exporter_fd, struct dumb_bo *scratch,
 	scratch->height = mode->vdisplay;
 	scratch->bpp = 32;
 
-	scratch->handle = kmstest_dumb_create(exporter_fd,
-			ALIGN(scratch->width, 256),
-			scratch->height,
-			scratch->bpp,
-			&scratch->pitch,
-			&scratch->size);
-
-
-	ptr = kmstest_dumb_map_buffer(exporter_fd,
-				      scratch->handle,
-				      scratch->size,
-				      PROT_WRITE);
+	if (!is_i915_device(exporter_fd)) {
+		scratch->handle = kmstest_dumb_create(exporter_fd,
+						      ALIGN(scratch->width, 256),
+						      scratch->height, scratch->bpp,
+						      &scratch->pitch, &scratch->size);
+
+		ptr = kmstest_dumb_map_buffer(exporter_fd, scratch->handle,
+					      scratch->size, PROT_WRITE);
+	} else {
+		igt_calc_fb_size(exporter_fd, mode->hdisplay, mode->vdisplay, DRM_FORMAT_XRGB8888,
+				 DRM_FORMAT_MOD_NONE, &scratch->size, &scratch->pitch);
+		if (gem_has_lmem(exporter_fd))
+			scratch->handle = gem_create_in_memory_regions(exporter_fd, scratch->size,
+								       REGION_LMEM(0), REGION_SMEM);
+		else
+			scratch->handle = gem_create_in_memory_regions(exporter_fd, scratch->size,
+								       REGION_SMEM);
+
+		ptr = gem_mmap__device_coherent(exporter_fd, scratch->handle, 0, scratch->size,
+						PROT_WRITE | PROT_READ);
+	}
 
 	for (size_t idx = 0; idx < scratch->size / sizeof(*ptr); ++idx)
 		ptr[idx] = color;
-- 
2.20.1