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

[janga.rahul.kumar at intel.com]

From: Janga Rahul Kumar <janga.rahul.kumar at 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.

Cc: Lucas De Marchi <lucas.demarchi at intel.com>
Signed-off-by: Janga Rahul Kumar <janga.rahul.kumar at intel.com>
---
 tests/intel/xe_vm.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/tests/intel/xe_vm.c b/tests/intel/xe_vm.c
index dd3302337..2aead9427 100644
--- a/tests/intel/xe_vm.c
+++ b/tests/intel/xe_vm.c
@@ -377,6 +377,10 @@ 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