[PATCH i-g-t v3 03/10] tests/intel/xe_svm: Add SVM basic tests using malloc and mmap

[Bommu Krishnaiah]

Adds subtests to verify the basic functionality of Shared Virtual Memory (SVM)
in the xe driver. The tests ensure that memory allocated with malloc or mmap can be correctly
used for GPU command submission and data verification.

Subtests:
- svm-basic-malloc: Verifies SVM functionality using memory allocated with malloc.
- svm-basic-mmap: Verifies SVM functionality using memory allocated with mmap.

The verification is done by writing a specific value to the allocated memory via GPU and
checking if the value is correctly stored.

Signed-off-by: Bommu Krishnaiah <krishnaiah.bommu at intel.com>
Cc: Oak Zeng <oak.zeng at intel.com>
Cc: Himal Prasad Ghimiray <himal.prasad.ghimiray at intel.com>
---
 include/drm-uapi/xe_drm.h |  1 +
 tests/intel/xe_svm.c      | 52 +++++++++++++++++++++++++++++++++++++++
 2 files changed, 53 insertions(+)

diff --git a/include/drm-uapi/xe_drm.h b/include/drm-uapi/xe_drm.h
index 0b709b374..69c8792bb 100644
--- a/include/drm-uapi/xe_drm.h
+++ b/include/drm-uapi/xe_drm.h
@@ -973,6 +973,7 @@ struct drm_xe_vm_bind_op {
 #define DRM_XE_VM_BIND_FLAG_IMMEDIATE	(1 << 1)
 #define DRM_XE_VM_BIND_FLAG_NULL	(1 << 2)
 #define DRM_XE_VM_BIND_FLAG_DUMPABLE	(1 << 3)
+#define DRM_XE_VM_BIND_FLAG_SYSTEM_ALLOCATOR	(1 << 4)
 	/** @flags: Bind flags */
 	__u32 flags;
 
diff --git a/tests/intel/xe_svm.c b/tests/intel/xe_svm.c
index 6302af95b..741961529 100644
--- a/tests/intel/xe_svm.c
+++ b/tests/intel/xe_svm.c
@@ -21,6 +21,12 @@
  *
  * SUBTEST: xe-basic
  * Description: Basic test to verify store dword functionality using helper functions
+ *
+ * SUBTEST: svm-basic-malloc
+ * Description: Verify SVM basic functionality using malloc.
+ *
+ * SUBTEST: svm-basic-mmap
+ * Description: Verify SVM basic functionality using mmap.
  */
 
 #include <fcntl.h>
@@ -75,6 +81,44 @@ static void xe_basic(int fd, uint32_t vm, struct drm_xe_engine_class_instance *e
 	xe_destroy_buffer(&dst_buf);
 }
 
+/**
+ * @brief Tests SVM functionality using malloc or mmap.
+ *
+ * This function tests the ability to use malloc or mmap allocated memory
+ * for direct GPU command submission and data verification.
+ */
+static void svm_basic(int fd, uint32_t vm, struct drm_xe_engine_class_instance *eci, bool test_mmap)
+{
+	uint64_t gpu_va = 0x1a0000;
+	size_t bo_size = xe_bb_size(fd, PAGE_ALIGN_UFENCE);
+	uint32_t *dst;
+
+	struct xe_buffer cmd_buf = {
+		.fd = fd,
+		.gpu_addr = (void *)(uintptr_t)gpu_va,
+		.vm = vm,
+		.size = bo_size,
+		.placement = vram_if_possible(fd, eci->gt_id),
+		.flag = DRM_XE_GEM_CREATE_FLAG_NEEDS_VISIBLE_VRAM,
+	};
+
+	if (test_mmap)
+		dst = mmap(NULL, 4, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0);
+	else
+		dst = aligned_alloc(xe_get_default_alignment(fd), 4);
+
+	xe_create_cmdbuf(&cmd_buf, insert_store, (uint64_t)dst, 0xc0ffee, eci);
+	xe_submit_cmd(&cmd_buf);
+
+	igt_assert_eq(*dst, 0xc0ffee);
+
+	xe_destroy_cmdbuf(&cmd_buf);
+	if (test_mmap)
+		munmap(dst, 4);
+	else
+		free(dst);
+}
+
 igt_main
 {
 	int fd;
@@ -91,6 +135,14 @@ igt_main
 		xe_for_each_engine(fd, hwe)
 			xe_basic(fd, vm, hwe);
 
+	igt_subtest_f("svm-basic-malloc")
+		xe_for_each_engine(fd, hwe)
+			svm_basic(fd, vm, hwe, false);
+
+	igt_subtest_f("svm-basic-mmap")
+		xe_for_each_engine(fd, hwe)
+			svm_basic(fd, vm, hwe, true);
+
 	igt_fixture {
 		xe_vm_destroy(fd, vm);
 		drm_close_driver(fd);
-- 
2.25.1