1 files changed, 77 insertions, 37 deletions

diff --git a/tools/testing/scatterlist/main.c b/tools/testing/scatterlist/main.c
index 0a1464181226..652254754b4c 100644
--- a/tools/testing/scatterlist/main.c
+++ b/tools/testing/scatterlist/main.c
@@ -5,6 +5,16 @@
 
 #define MAX_PAGES (64)
 
+struct test {
+	int alloc_ret;
+	unsigned num_pages;
+	unsigned *pfn;
+	unsigned *pfn_app;
+	unsigned size;
+	unsigned int max_seg;
+	unsigned int expected_segments;
+};
+
 static void set_pages(struct page **pages, const unsigned *array, unsigned num)
 {
 	unsigned int i;
@@ -17,58 +27,88 @@ static void set_pages(struct page **pages, const unsigned *array, unsigned num)
 
 #define pfn(...) (unsigned []){ __VA_ARGS__ }
 
+static void fail(struct test *test, struct sg_table *st, const char *cond)
+{
+	unsigned int i;
+
+	fprintf(stderr, "Failed on '%s'!\n\n", cond);
+
+	printf("size = %u, max segment = %u, expected nents = %u\nst->nents = %u, st->orig_nents= %u\n",
+	       test->size, test->max_seg, test->expected_segments, st->nents,
+	       st->orig_nents);
+
+	printf("%u input PFNs:", test->num_pages);
+	for (i = 0; i < test->num_pages; i++)
+		printf(" %x", test->pfn[i]);
+	printf("\n");
+
+	exit(1);
+}
+
+#define VALIDATE(cond, st, test) \
+	if (!(cond)) \
+		fail((test), (st), #cond);
+
 int main(void)
 {
-	const unsigned int sgmax = SCATTERLIST_MAX_SEGMENT;
-	struct test {
-		int alloc_ret;
-		unsigned num_pages;
-		unsigned *pfn;
-		unsigned size;
-		unsigned int max_seg;
-		unsigned int expected_segments;
-	} *test, tests[] = {
-		{ -EINVAL, 1, pfn(0), PAGE_SIZE, PAGE_SIZE + 1, 1 },
-		{ -EINVAL, 1, pfn(0), PAGE_SIZE, 0, 1 },
-		{ -EINVAL, 1, pfn(0), PAGE_SIZE, sgmax + 1, 1 },
-		{ 0, 1, pfn(0), PAGE_SIZE, sgmax, 1 },
-		{ 0, 1, pfn(0), 1, sgmax, 1 },
-		{ 0, 2, pfn(0, 1), 2 * PAGE_SIZE, sgmax, 1 },
-		{ 0, 2, pfn(1, 0), 2 * PAGE_SIZE, sgmax, 2 },
-		{ 0, 3, pfn(0, 1, 2), 3 * PAGE_SIZE, sgmax, 1 },
-		{ 0, 3, pfn(0, 2, 1), 3 * PAGE_SIZE, sgmax, 3 },
-		{ 0, 3, pfn(0, 1, 3), 3 * PAGE_SIZE, sgmax, 2 },
-		{ 0, 3, pfn(1, 2, 4), 3 * PAGE_SIZE, sgmax, 2 },
-		{ 0, 3, pfn(1, 3, 4), 3 * PAGE_SIZE, sgmax, 2 },
-		{ 0, 4, pfn(0, 1, 3, 4), 4 * PAGE_SIZE, sgmax, 2 },
-		{ 0, 5, pfn(0, 1, 3, 4, 5), 5 * PAGE_SIZE, sgmax, 2 },
-		{ 0, 5, pfn(0, 1, 3, 4, 6), 5 * PAGE_SIZE, sgmax, 3 },
-		{ 0, 5, pfn(0, 1, 2, 3, 4), 5 * PAGE_SIZE, sgmax, 1 },
-		{ 0, 5, pfn(0, 1, 2, 3, 4), 5 * PAGE_SIZE, 2 * PAGE_SIZE, 3 },
-		{ 0, 6, pfn(0, 1, 2, 3, 4, 5), 6 * PAGE_SIZE, 2 * PAGE_SIZE, 3 },
-		{ 0, 6, pfn(0, 2, 3, 4, 5, 6), 6 * PAGE_SIZE, 2 * PAGE_SIZE, 4 },
-		{ 0, 6, pfn(0, 1, 3, 4, 5, 6), 6 * PAGE_SIZE, 2 * PAGE_SIZE, 3 },
-		{ 0, 0, NULL, 0, 0, 0 },
+	const unsigned int sgmax = UINT_MAX;
+	struct test *test, tests[] = {
+		{ -EINVAL, 1, pfn(0), NULL, PAGE_SIZE, 0, 1 },
+		{ 0, 1, pfn(0), NULL, PAGE_SIZE, PAGE_SIZE + 1, 1 },
+		{ 0, 1, pfn(0), NULL, PAGE_SIZE, sgmax, 1 },
+		{ 0, 1, pfn(0), NULL, 1, sgmax, 1 },
+		{ 0, 2, pfn(0, 1), NULL, 2 * PAGE_SIZE, sgmax, 1 },
+		{ 0, 2, pfn(1, 0), NULL, 2 * PAGE_SIZE, sgmax, 2 },
+		{ 0, 3, pfn(0, 1, 2), NULL, 3 * PAGE_SIZE, sgmax, 1 },
+		{ 0, 3, pfn(0, 1, 2), NULL, 3 * PAGE_SIZE, sgmax, 1 },
+		{ 0, 3, pfn(0, 1, 2), pfn(3, 4, 5), 3 * PAGE_SIZE, sgmax, 1 },
+		{ 0, 3, pfn(0, 1, 2), pfn(4, 5, 6), 3 * PAGE_SIZE, sgmax, 2 },
+		{ 0, 3, pfn(0, 2, 1), NULL, 3 * PAGE_SIZE, sgmax, 3 },
+		{ 0, 3, pfn(0, 1, 3), NULL, 3 * PAGE_SIZE, sgmax, 2 },
+		{ 0, 3, pfn(1, 2, 4), NULL, 3 * PAGE_SIZE, sgmax, 2 },
+		{ 0, 3, pfn(1, 3, 4), NULL, 3 * PAGE_SIZE, sgmax, 2 },
+		{ 0, 4, pfn(0, 1, 3, 4), NULL, 4 * PAGE_SIZE, sgmax, 2 },
+		{ 0, 5, pfn(0, 1, 3, 4, 5), NULL, 5 * PAGE_SIZE, sgmax, 2 },
+		{ 0, 5, pfn(0, 1, 3, 4, 6), NULL, 5 * PAGE_SIZE, sgmax, 3 },
+		{ 0, 5, pfn(0, 1, 2, 3, 4), NULL, 5 * PAGE_SIZE, sgmax, 1 },
+		{ 0, 5, pfn(0, 1, 2, 3, 4), NULL, 5 * PAGE_SIZE, 2 * PAGE_SIZE,
+		  3 },
+		{ 0, 6, pfn(0, 1, 2, 3, 4, 5), NULL, 6 * PAGE_SIZE,
+		  2 * PAGE_SIZE, 3 },
+		{ 0, 6, pfn(0, 2, 3, 4, 5, 6), NULL, 6 * PAGE_SIZE,
+		  2 * PAGE_SIZE, 4 },
+		{ 0, 6, pfn(0, 1, 3, 4, 5, 6), pfn(7, 8, 9, 10, 11, 12),
+		  6 * PAGE_SIZE, 12 * PAGE_SIZE, 2 },
+		{ 0, 0, NULL, NULL, 0, 0, 0 },
 	};
 	unsigned int i;
 
 	for (i = 0, test = tests; test->expected_segments; test++, i++) {
+		int left_pages = test->pfn_app ? test->num_pages : 0;
 		struct page *pages[MAX_PAGES];
 		struct sg_table st;
-		int ret;
+		struct scatterlist *sg;
 
 		set_pages(pages, test->pfn, test->num_pages);
 
-		ret = __sg_alloc_table_from_pages(&st, pages, test->num_pages,
-						  0, test->size, test->max_seg,
-						  GFP_KERNEL);
-		assert(ret == test->alloc_ret);
+		sg = __sg_alloc_table_from_pages(&st, pages, test->num_pages, 0,
+				test->size, test->max_seg, NULL, left_pages, GFP_KERNEL);
+		assert(PTR_ERR_OR_ZERO(sg) == test->alloc_ret);
 
 		if (test->alloc_ret)
 			continue;
 
-		assert(st.nents == test->expected_segments);
-		assert(st.orig_nents == test->expected_segments);
+		if (test->pfn_app) {
+			set_pages(pages, test->pfn_app, test->num_pages);
+			sg = __sg_alloc_table_from_pages(&st, pages, test->num_pages, 0,
+					test->size, test->max_seg, sg, 0, GFP_KERNEL);
+
+			assert(PTR_ERR_OR_ZERO(sg) == test->alloc_ret);
+		}
+
+		VALIDATE(st.nents == test->expected_segments, &st, test);
+		if (!test->pfn_app)
+			VALIDATE(st.orig_nents == test->expected_segments, &st, test);
 
 		sg_free_table(&st);
 	}