[igt-dev] [PATCH 2/4] xe_exec_basic: Add NULL VM bind section

[Matthew Brost <matthew.brost@intel.com>]

A NULL VM bind results in writes being dropped and reads returning zero,
verify uAPI for NULL VM binds is working as designed.

Signed-off-by: Matthew Brost <matthew.brost@intel.com>
---
 tests/xe/xe_exec_basic.c | 29 ++++++++++++++++++++++++-----
 1 file changed, 24 insertions(+), 5 deletions(-)

diff --git a/tests/xe/xe_exec_basic.c b/tests/xe/xe_exec_basic.c
index d9af97d8..c5796e45 100644
--- a/tests/xe/xe_exec_basic.c
+++ b/tests/xe/xe_exec_basic.c
@@ -27,6 +27,7 @@
 #define BIND_ENGINE	(0x1 << 4)
 #define DEFER_ALLOC	(0x1 << 5)
 #define DEFER_BIND	(0x1 << 6)
+#define SPARSE		(0x1 << 7)
 
 /**
  * SUBTEST: once-%s
@@ -89,6 +90,7 @@ test_exec(int fd, struct drm_xe_engine_class_instance *eci,
 		.syncs = to_user_pointer(&sync),
 	};
 	uint64_t addr[MAX_N_ENGINES];
+	uint64_t sparse_addr[MAX_N_ENGINES];
 	uint32_t vm[MAX_N_ENGINES];
 	uint32_t engines[MAX_N_ENGINES];
 	uint32_t bind_engines[MAX_N_ENGINES];
@@ -112,8 +114,11 @@ test_exec(int fd, struct drm_xe_engine_class_instance *eci,
 			xe_get_default_alignment(fd));
 
 	addr[0] = 0x1a0000;
-	for (i = 1; i < MAX_N_ENGINES; ++i)
+	sparse_addr[0] = 0x301a0000;
+	for (i = 1; i < MAX_N_ENGINES; ++i) {
 		addr[i] = addr[i - 1] + (0x1ull << 32);
+		sparse_addr[i] = sparse_addr[i - 1] + (0x1ull << 32);
+	}
 
 	if (flags & USERPTR) {
 #define	MAP_ADDRESS	0x00007fadeadbe000
@@ -161,6 +166,13 @@ test_exec(int fd, struct drm_xe_engine_class_instance *eci,
 			xe_vm_bind_userptr_async(fd, vm[i], bind_engines[i],
 						 to_user_pointer(data), addr[i],
 						 bo_size, sync, 1);
+		if (flags & SPARSE)
+			__xe_vm_bind_assert(fd, vm[i], bind_engines[i],
+					    0, 0, sparse_addr[i], bo_size,
+					    XE_VM_BIND_OP_MAP |
+					    XE_VM_BIND_FLAG_ASYNC |
+					    XE_VM_BIND_FLAG_NULL, sync,
+					    1, 0, 0);
 	}
 
 	if (flags & DEFER_BIND)
@@ -171,7 +183,8 @@ test_exec(int fd, struct drm_xe_engine_class_instance *eci,
 		uint64_t batch_offset = (char *)&data[i].batch - (char *)data;
 		uint64_t batch_addr = __addr + batch_offset;
 		uint64_t sdi_offset = (char *)&data[i].data - (char *)data;
-		uint64_t sdi_addr = __addr + sdi_offset;
+		uint64_t sdi_addr = (flags & SPARSE ? sparse_addr[i % n_vm] :
+				     __addr)+ sdi_offset;
 		int e = i % n_engines;
 
 		b = 0;
@@ -254,9 +267,11 @@ test_exec(int fd, struct drm_xe_engine_class_instance *eci,
 					INT64_MAX, 0, NULL));
 	}
 
-	for (i = (flags & INVALIDATE && n_execs) ? n_execs - 1 : 0;
-	     i < n_execs; i++)
-		igt_assert_eq(data[i].data, 0xc0ffee);
+	if (!(flags & SPARSE)) {
+		for (i = (flags & INVALIDATE && n_execs) ? n_execs - 1 : 0;
+		     i < n_execs; i++)
+			igt_assert_eq(data[i].data, 0xc0ffee);
+	}
 
 	syncobj_destroy(fd, sync[0].handle);
 	for (i = 0; i < n_engines; i++) {
@@ -288,6 +303,10 @@ igt_main
 		{ "basic-defer-bind", DEFER_ALLOC | DEFER_BIND },
 		{ "userptr", USERPTR },
 		{ "rebind", REBIND },
+		{ "null", SPARSE },
+		{ "null-defer-mmap", SPARSE | DEFER_ALLOC },
+		{ "null-defer-bind", SPARSE | DEFER_ALLOC | DEFER_BIND },
+		{ "null-rebind", SPARSE | REBIND },
 		{ "userptr-rebind", USERPTR | REBIND },
 		{ "userptr-invalidate", USERPTR | INVALIDATE },
 		{ "userptr-invalidate-race", USERPTR | INVALIDATE | RACE },
-- 
2.34.1