[igt-dev] [PATCH i-g-t] tests/intel/xe_vm: Correct stride to avoid address range collision

[janga.rahul.kumar@intel.com]

From: Janga Rahul Kumar <janga.rahul.kumar@intel.com>

For XE2, the minimum page size for both VRAM and system memory is only 4K.

Minimum page size was used as the address stride, which is 4K.
When attempting to bind a 4K range, consecutive VM BIND IOCTL calls
resulted in a range collision. Update stride based on bo size.

v2: Address review comments (Karolina)

Cc: Karolina Stolarek <karolina.stolarek@intel.com>
Cc: Lucas De Marchi <lucas.demarchi@intel.com>
Signed-off-by: Janga Rahul Kumar <janga.rahul.kumar@intel.com>
---
 tests/intel/xe_vm.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/tests/intel/xe_vm.c b/tests/intel/xe_vm.c
index eeb49122a..f1ccd6c21 100644
--- a/tests/intel/xe_vm.c
+++ b/tests/intel/xe_vm.c
@@ -417,6 +417,9 @@ shared_pte_page(int fd, struct drm_xe_engine_class_instance *eci, int n_bo,
 	bo_size = ALIGN(bo_size + xe_cs_prefetch_size(fd),
 			xe_get_default_alignment(fd));
 
+	if (addr_stride <= bo_size)
+		addr_stride = addr_stride + bo_size;
+
 	for (i = 0; i < n_bo; ++i) {
 		bo[i] = xe_bo_create_flags(fd, vm, bo_size,
 					   visible_vram_if_possible(fd, eci->gt_id));
-- 
2.25.1