2 files changed, 74 insertions, 4 deletions

diff --git a/tools/testing/selftests/bpf/xskxceiver.c b/tools/testing/selftests/bpf/xskxceiver.c
index 74b21ddf5a98..ef33309bbe49 100644
--- a/tools/testing/selftests/bpf/xskxceiver.c
+++ b/tools/testing/selftests/bpf/xskxceiver.c
@@ -124,9 +124,20 @@ static void __exit_with_error(int error, const char *file, const char *func, int
 }
 
 #define exit_with_error(error) __exit_with_error(error, __FILE__, __func__, __LINE__)
-
-#define mode_string(test) (test)->ifobj_tx->xdp_flags & XDP_FLAGS_SKB_MODE ? "SKB" : "DRV"
 #define busy_poll_string(test) (test)->ifobj_tx->busy_poll ? "BUSY-POLL " : ""
+static char *mode_string(struct test_spec *test)
+{
+	switch (test->mode) {
+	case TEST_MODE_SKB:
+		return "SKB";
+	case TEST_MODE_DRV:
+		return "DRV";
+	case TEST_MODE_ZC:
+		return "ZC";
+	default:
+		return "BOGUS";
+	}
+}
 
 static void report_failure(struct test_spec *test)
 {
@@ -322,6 +333,51 @@ static int __xsk_configure_socket(struct xsk_socket_info *xsk, struct xsk_umem_i
 	return xsk_socket__create(&xsk->xsk, ifobject->ifname, 0, umem->umem, rxr, txr, &cfg);
 }
 
+static bool ifobj_zc_avail(struct ifobject *ifobject)
+{
+	size_t umem_sz = DEFAULT_UMEM_BUFFERS * XSK_UMEM__DEFAULT_FRAME_SIZE;
+	int mmap_flags = MAP_PRIVATE | MAP_ANONYMOUS | MAP_NORESERVE;
+	struct xsk_socket_info *xsk;
+	struct xsk_umem_info *umem;
+	bool zc_avail = false;
+	void *bufs;
+	int ret;
+
+	bufs = mmap(NULL, umem_sz, PROT_READ | PROT_WRITE, mmap_flags, -1, 0);
+	if (bufs == MAP_FAILED)
+		exit_with_error(errno);
+
+	umem = calloc(1, sizeof(struct xsk_umem_info));
+	if (!umem) {
+		munmap(bufs, umem_sz);
+		exit_with_error(-ENOMEM);
+	}
+	umem->frame_size = XSK_UMEM__DEFAULT_FRAME_SIZE;
+	ret = xsk_configure_umem(umem, bufs, umem_sz);
+	if (ret)
+		exit_with_error(-ret);
+
+	xsk = calloc(1, sizeof(struct xsk_socket_info));
+	if (!xsk)
+		goto out;
+	ifobject->xdp_flags = XDP_FLAGS_UPDATE_IF_NOEXIST;
+	ifobject->xdp_flags |= XDP_FLAGS_DRV_MODE;
+	ifobject->bind_flags = XDP_USE_NEED_WAKEUP | XDP_ZEROCOPY;
+	ifobject->rx_on = true;
+	xsk->rxqsize = XSK_RING_CONS__DEFAULT_NUM_DESCS;
+	ret = __xsk_configure_socket(xsk, umem, ifobject, false);
+	if (!ret)
+		zc_avail = true;
+
+	xsk_socket__delete(xsk->xsk);
+	free(xsk);
+out:
+	munmap(umem->buffer, umem_sz);
+	xsk_umem__delete(umem->umem);
+	free(umem);
+	return zc_avail;
+}
+
 static struct option long_options[] = {
 	{"interface", required_argument, 0, 'i'},
 	{"busy-poll", no_argument, 0, 'b'},
@@ -488,9 +544,14 @@ static void test_spec_init(struct test_spec *test, struct ifobject *ifobj_tx,
 		else
 			ifobj->xdp_flags |= XDP_FLAGS_DRV_MODE;
 
-		ifobj->bind_flags = XDP_USE_NEED_WAKEUP | XDP_COPY;
+		ifobj->bind_flags = XDP_USE_NEED_WAKEUP;
+		if (mode == TEST_MODE_ZC)
+			ifobj->bind_flags |= XDP_ZEROCOPY;
+		else
+			ifobj->bind_flags |= XDP_COPY;
 	}
 
+	test->mode = mode;
 	__test_spec_init(test, ifobj_tx, ifobj_rx);
 }
 
@@ -1664,6 +1725,10 @@ static void run_pkt_test(struct test_spec *test, enum test_mode mode, enum test_
 {
 	switch (type) {
 	case TEST_TYPE_STATS_RX_DROPPED:
+		if (mode == TEST_MODE_ZC) {
+			ksft_test_result_skip("Can not run RX_DROPPED test for ZC mode\n");
+			return;
+		}
 		testapp_stats_rx_dropped(test);
 		break;
 	case TEST_TYPE_STATS_TX_INVALID_DESCS:
@@ -1860,8 +1925,11 @@ int main(int argc, char **argv)
 	init_iface(ifobj_rx, MAC2, MAC1, IP2, IP1, UDP_PORT2, UDP_PORT1,
 		   worker_testapp_validate_rx);
 
-	if (is_xdp_supported(ifobj_tx))
+	if (is_xdp_supported(ifobj_tx)) {
 		modes++;
+		if (ifobj_zc_avail(ifobj_tx))
+			modes++;
+	}
 
 	test_spec_init(&test, ifobj_tx, ifobj_rx, 0);
 	tx_pkt_stream_default = pkt_stream_generate(ifobj_tx->umem, DEFAULT_PKT_CNT, PKT_SIZE);
diff --git a/tools/testing/selftests/bpf/xskxceiver.h b/tools/testing/selftests/bpf/xskxceiver.h
index 11f017785986..edb76d2def9f 100644
--- a/tools/testing/selftests/bpf/xskxceiver.h
+++ b/tools/testing/selftests/bpf/xskxceiver.h
@@ -62,6 +62,7 @@
 enum test_mode {
 	TEST_MODE_SKB,
 	TEST_MODE_DRV,
+	TEST_MODE_ZC,
 	TEST_MODE_MAX
 };
 
@@ -167,6 +168,7 @@ struct test_spec {
 	u16 current_step;
 	u16 nb_sockets;
 	bool fail;
+	enum test_mode mode;
 	char name[MAX_TEST_NAME_SIZE];
 };