[PATCH 1/1] tests/intel/xe_vm: Add test for 64k page corners

[Matthew Brost]

64k pages - either compact or 64k hint set in PTE have corner cases
around partial unbinds / rebinds. Add a section which tests these
corners.

Signed-off-by: Matthew Brost <matthew.brost at intel.com>
---
 tests/intel/xe_vm.c | 129 ++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 129 insertions(+)

diff --git a/tests/intel/xe_vm.c b/tests/intel/xe_vm.c
index 79fd007023..2e08ab2057 100644
--- a/tests/intel/xe_vm.c
+++ b/tests/intel/xe_vm.c
@@ -365,6 +365,129 @@ static void userptr_invalid(int fd)
 	xe_vm_destroy(fd, vm);
 }
 
+/**
+ * SUBTEST: compact-64k-pages
+ * Description:
+ *	Take corner cases related to compact and 64k pages
+ * Functionality: bind
+ * Test category: functionality test
+ */
+static void compact_64k_pages(int fd, struct drm_xe_engine_class_instance *eci)
+{
+	size_t page_size = xe_get_default_alignment(fd);
+	uint64_t addr0 = 0x10000000ull, addr1;
+	uint32_t vm;
+	uint32_t bo0, bo1;
+	uint32_t exec_queue;
+	void *ptr0, *ptr1;
+	struct drm_xe_sync sync[2] = {
+		{ .type = DRM_XE_SYNC_TYPE_SYNCOBJ,
+			.flags = DRM_XE_SYNC_FLAG_SIGNAL, },
+		{ .type = DRM_XE_SYNC_TYPE_SYNCOBJ,
+			.flags = DRM_XE_SYNC_FLAG_SIGNAL, },
+	};
+	struct {
+		uint32_t batch[16];
+		uint64_t pad;
+		uint32_t data;
+	} *data = NULL;
+	struct drm_xe_exec exec = {
+		.num_batch_buffer = 1,
+		.num_syncs = 2,
+		.syncs = to_user_pointer(sync),
+	};
+	int i, b;
+
+#define EIGHT_MB	0x800000
+#define SIXTY_FOUR_KB	0x10000
+
+	vm = xe_vm_create(fd, 0, 0);
+	exec_queue = xe_exec_queue_create(fd, vm, eci, 0);
+
+	bo0 = xe_bo_create(fd, vm, EIGHT_MB,
+			   vram_if_possible(fd, eci->gt_id),
+			   DRM_XE_GEM_CREATE_FLAG_NEEDS_VISIBLE_VRAM);
+	ptr0 = xe_bo_map(fd, bo0, EIGHT_MB);
+
+	bo1 = xe_bo_create(fd, vm, EIGHT_MB / 2,
+			   vram_if_possible(fd, eci->gt_id),
+			   DRM_XE_GEM_CREATE_FLAG_NEEDS_VISIBLE_VRAM);
+	ptr1 = xe_bo_map(fd, bo1, EIGHT_MB / 2);
+
+	sync[0].handle = syncobj_create(fd, 0);
+	if (page_size == 0x1000) {
+		/* Setup mapping to split a 64k PTE in cache */
+		xe_vm_bind_async(fd, vm, 0, bo0, 0, addr0, SIXTY_FOUR_KB, 0, 0);
+
+		addr1 = addr0 + (SIXTY_FOUR_KB / 2);
+		xe_vm_bind_async(fd, vm, 0, bo1, 0, addr1, SIXTY_FOUR_KB / 2,
+				 sync, 1);
+	} else if (page_size == SIXTY_FOUR_KB) {
+		addr0 += page_size;
+
+		/* Setup mapping to split compact 64k pages */
+		xe_vm_bind_async(fd, vm, 0, bo0, 0, addr0, EIGHT_MB, 0, 0);
+
+		addr1 = addr0 + (EIGHT_MB / 4);
+		xe_vm_bind_async(fd, vm, 0, bo1, 0, addr1, EIGHT_MB / 2,
+				 sync, 1);
+	}
+	igt_assert(syncobj_wait(fd, &sync[0].handle, 1, INT64_MAX, 0, NULL));
+
+	i = 0;
+	{
+		uint64_t batch_offset = (char *)&data[i].batch - (char *)data;
+		uint64_t batch_addr = addr0 + batch_offset;
+		uint64_t sdi_offset = (char *)&data[i].data - (char *)data;
+		uint64_t sdi_addr = addr0 + sdi_offset;
+		data = ptr0;
+
+		b = 0;
+		data[i].batch[b++] = MI_STORE_DWORD_IMM_GEN4;
+		data[i].batch[b++] = sdi_addr;
+		data[i].batch[b++] = sdi_addr >> 32;
+		data[i].batch[b++] = 0xc0ffee;
+
+		sdi_addr = addr1 + sdi_offset;
+		data[i].batch[b++] = MI_STORE_DWORD_IMM_GEN4;
+		data[i].batch[b++] = sdi_addr;
+		data[i].batch[b++] = sdi_addr >> 32;
+		data[i].batch[b++] = 0xc0ffee;
+
+		data[i].batch[b++] = MI_BATCH_BUFFER_END;
+		igt_assert(b <= ARRAY_SIZE(data[i].batch));
+
+		sync[0].flags &= ~DRM_XE_SYNC_FLAG_SIGNAL;
+		sync[1].handle = syncobj_create(fd, 0);
+		exec.exec_queue_id = exec_queue;
+		exec.address = batch_addr;
+		xe_exec(fd, &exec);
+
+		igt_assert(syncobj_wait(fd, &sync[1].handle, 1, INT64_MAX, 0,
+					NULL));
+
+		igt_assert_eq(data[i].data, 0xc0ffee);
+
+		data = ptr1;
+		igt_assert_eq(data[i].data, 0xc0ffee);
+	}
+
+	sync[0].flags |= DRM_XE_SYNC_FLAG_SIGNAL;
+	syncobj_reset(fd, &sync[0].handle, 1);
+	xe_vm_unbind_all_async(fd, vm, 0, bo0, 0, 0);
+	xe_vm_unbind_all_async(fd, vm, 0, bo1, sync, 1);
+	igt_assert(syncobj_wait(fd, &sync[0].handle, 1, INT64_MAX, 0, NULL));
+
+	xe_exec_queue_destroy(fd, exec_queue);
+	syncobj_destroy(fd, sync[0].handle);
+	syncobj_destroy(fd, sync[1].handle);
+	munmap(ptr0, EIGHT_MB);
+	munmap(ptr1, EIGHT_MB / 2);
+	gem_close(fd, bo0);
+	gem_close(fd, bo1);
+	xe_vm_destroy(fd, vm);
+}
+
 /**
  * SUBTEST: shared-%s-page
  * Description: Test shared arg[1] page
@@ -2143,6 +2266,12 @@ igt_main
 	igt_subtest("userptr-invalid")
 		userptr_invalid(fd);
 
+	igt_subtest("compact-64k-pages")
+		xe_for_each_engine(fd, hwe) {
+			compact_64k_pages(fd, hwe);
+			break;
+		}
+
 	igt_subtest("shared-pte-page")
 		xe_for_each_engine(fd, hwe)
 			shared_pte_page(fd, hwe, 4,
-- 
2.34.1