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-rw-r--r--drivers/thunderbolt/test.c1626
1 files changed, 1626 insertions, 0 deletions
diff --git a/drivers/thunderbolt/test.c b/drivers/thunderbolt/test.c
new file mode 100644
index 000000000000..a4d78811f7e2
--- /dev/null
+++ b/drivers/thunderbolt/test.c
@@ -0,0 +1,1626 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * KUnit tests
+ *
+ * Copyright (C) 2020, Intel Corporation
+ * Author: Mika Westerberg <mika.westerberg@linux.intel.com>
+ */
+
+#include <kunit/test.h>
+#include <linux/idr.h>
+
+#include "tb.h"
+#include "tunnel.h"
+
+static int __ida_init(struct kunit_resource *res, void *context)
+{
+ struct ida *ida = context;
+
+ ida_init(ida);
+ res->data = ida;
+ return 0;
+}
+
+static void __ida_destroy(struct kunit_resource *res)
+{
+ struct ida *ida = res->data;
+
+ ida_destroy(ida);
+}
+
+static void kunit_ida_init(struct kunit *test, struct ida *ida)
+{
+ kunit_alloc_resource(test, __ida_init, __ida_destroy, GFP_KERNEL, ida);
+}
+
+static struct tb_switch *alloc_switch(struct kunit *test, u64 route,
+ u8 upstream_port, u8 max_port_number)
+{
+ struct tb_switch *sw;
+ size_t size;
+ int i;
+
+ sw = kunit_kzalloc(test, sizeof(*sw), GFP_KERNEL);
+ if (!sw)
+ return NULL;
+
+ sw->config.upstream_port_number = upstream_port;
+ sw->config.depth = tb_route_length(route);
+ sw->config.route_hi = upper_32_bits(route);
+ sw->config.route_lo = lower_32_bits(route);
+ sw->config.enabled = 0;
+ sw->config.max_port_number = max_port_number;
+
+ size = (sw->config.max_port_number + 1) * sizeof(*sw->ports);
+ sw->ports = kunit_kzalloc(test, size, GFP_KERNEL);
+ if (!sw->ports)
+ return NULL;
+
+ for (i = 0; i <= sw->config.max_port_number; i++) {
+ sw->ports[i].sw = sw;
+ sw->ports[i].port = i;
+ sw->ports[i].config.port_number = i;
+ if (i) {
+ kunit_ida_init(test, &sw->ports[i].in_hopids);
+ kunit_ida_init(test, &sw->ports[i].out_hopids);
+ }
+ }
+
+ return sw;
+}
+
+static struct tb_switch *alloc_host(struct kunit *test)
+{
+ struct tb_switch *sw;
+
+ sw = alloc_switch(test, 0, 7, 13);
+ if (!sw)
+ return NULL;
+
+ sw->config.vendor_id = 0x8086;
+ sw->config.device_id = 0x9a1b;
+
+ sw->ports[0].config.type = TB_TYPE_PORT;
+ sw->ports[0].config.max_in_hop_id = 7;
+ sw->ports[0].config.max_out_hop_id = 7;
+
+ sw->ports[1].config.type = TB_TYPE_PORT;
+ sw->ports[1].config.max_in_hop_id = 19;
+ sw->ports[1].config.max_out_hop_id = 19;
+ sw->ports[1].dual_link_port = &sw->ports[2];
+
+ sw->ports[2].config.type = TB_TYPE_PORT;
+ sw->ports[2].config.max_in_hop_id = 19;
+ sw->ports[2].config.max_out_hop_id = 19;
+ sw->ports[2].dual_link_port = &sw->ports[1];
+ sw->ports[2].link_nr = 1;
+
+ sw->ports[3].config.type = TB_TYPE_PORT;
+ sw->ports[3].config.max_in_hop_id = 19;
+ sw->ports[3].config.max_out_hop_id = 19;
+ sw->ports[3].dual_link_port = &sw->ports[4];
+
+ sw->ports[4].config.type = TB_TYPE_PORT;
+ sw->ports[4].config.max_in_hop_id = 19;
+ sw->ports[4].config.max_out_hop_id = 19;
+ sw->ports[4].dual_link_port = &sw->ports[3];
+ sw->ports[4].link_nr = 1;
+
+ sw->ports[5].config.type = TB_TYPE_DP_HDMI_IN;
+ sw->ports[5].config.max_in_hop_id = 9;
+ sw->ports[5].config.max_out_hop_id = 9;
+ sw->ports[5].cap_adap = -1;
+
+ sw->ports[6].config.type = TB_TYPE_DP_HDMI_IN;
+ sw->ports[6].config.max_in_hop_id = 9;
+ sw->ports[6].config.max_out_hop_id = 9;
+ sw->ports[6].cap_adap = -1;
+
+ sw->ports[7].config.type = TB_TYPE_NHI;
+ sw->ports[7].config.max_in_hop_id = 11;
+ sw->ports[7].config.max_out_hop_id = 11;
+
+ sw->ports[8].config.type = TB_TYPE_PCIE_DOWN;
+ sw->ports[8].config.max_in_hop_id = 8;
+ sw->ports[8].config.max_out_hop_id = 8;
+
+ sw->ports[9].config.type = TB_TYPE_PCIE_DOWN;
+ sw->ports[9].config.max_in_hop_id = 8;
+ sw->ports[9].config.max_out_hop_id = 8;
+
+ sw->ports[10].disabled = true;
+ sw->ports[11].disabled = true;
+
+ sw->ports[12].config.type = TB_TYPE_USB3_DOWN;
+ sw->ports[12].config.max_in_hop_id = 8;
+ sw->ports[12].config.max_out_hop_id = 8;
+
+ sw->ports[13].config.type = TB_TYPE_USB3_DOWN;
+ sw->ports[13].config.max_in_hop_id = 8;
+ sw->ports[13].config.max_out_hop_id = 8;
+
+ return sw;
+}
+
+static struct tb_switch *alloc_dev_default(struct kunit *test,
+ struct tb_switch *parent,
+ u64 route, bool bonded)
+{
+ struct tb_port *port, *upstream_port;
+ struct tb_switch *sw;
+
+ sw = alloc_switch(test, route, 1, 19);
+ if (!sw)
+ return NULL;
+
+ sw->config.vendor_id = 0x8086;
+ sw->config.device_id = 0x15ef;
+
+ sw->ports[0].config.type = TB_TYPE_PORT;
+ sw->ports[0].config.max_in_hop_id = 8;
+ sw->ports[0].config.max_out_hop_id = 8;
+
+ sw->ports[1].config.type = TB_TYPE_PORT;
+ sw->ports[1].config.max_in_hop_id = 19;
+ sw->ports[1].config.max_out_hop_id = 19;
+ sw->ports[1].dual_link_port = &sw->ports[2];
+
+ sw->ports[2].config.type = TB_TYPE_PORT;
+ sw->ports[2].config.max_in_hop_id = 19;
+ sw->ports[2].config.max_out_hop_id = 19;
+ sw->ports[2].dual_link_port = &sw->ports[1];
+ sw->ports[2].link_nr = 1;
+
+ sw->ports[3].config.type = TB_TYPE_PORT;
+ sw->ports[3].config.max_in_hop_id = 19;
+ sw->ports[3].config.max_out_hop_id = 19;
+ sw->ports[3].dual_link_port = &sw->ports[4];
+
+ sw->ports[4].config.type = TB_TYPE_PORT;
+ sw->ports[4].config.max_in_hop_id = 19;
+ sw->ports[4].config.max_out_hop_id = 19;
+ sw->ports[4].dual_link_port = &sw->ports[3];
+ sw->ports[4].link_nr = 1;
+
+ sw->ports[5].config.type = TB_TYPE_PORT;
+ sw->ports[5].config.max_in_hop_id = 19;
+ sw->ports[5].config.max_out_hop_id = 19;
+ sw->ports[5].dual_link_port = &sw->ports[6];
+
+ sw->ports[6].config.type = TB_TYPE_PORT;
+ sw->ports[6].config.max_in_hop_id = 19;
+ sw->ports[6].config.max_out_hop_id = 19;
+ sw->ports[6].dual_link_port = &sw->ports[5];
+ sw->ports[6].link_nr = 1;
+
+ sw->ports[7].config.type = TB_TYPE_PORT;
+ sw->ports[7].config.max_in_hop_id = 19;
+ sw->ports[7].config.max_out_hop_id = 19;
+ sw->ports[7].dual_link_port = &sw->ports[8];
+
+ sw->ports[8].config.type = TB_TYPE_PORT;
+ sw->ports[8].config.max_in_hop_id = 19;
+ sw->ports[8].config.max_out_hop_id = 19;
+ sw->ports[8].dual_link_port = &sw->ports[7];
+ sw->ports[8].link_nr = 1;
+
+ sw->ports[9].config.type = TB_TYPE_PCIE_UP;
+ sw->ports[9].config.max_in_hop_id = 8;
+ sw->ports[9].config.max_out_hop_id = 8;
+
+ sw->ports[10].config.type = TB_TYPE_PCIE_DOWN;
+ sw->ports[10].config.max_in_hop_id = 8;
+ sw->ports[10].config.max_out_hop_id = 8;
+
+ sw->ports[11].config.type = TB_TYPE_PCIE_DOWN;
+ sw->ports[11].config.max_in_hop_id = 8;
+ sw->ports[11].config.max_out_hop_id = 8;
+
+ sw->ports[12].config.type = TB_TYPE_PCIE_DOWN;
+ sw->ports[12].config.max_in_hop_id = 8;
+ sw->ports[12].config.max_out_hop_id = 8;
+
+ sw->ports[13].config.type = TB_TYPE_DP_HDMI_OUT;
+ sw->ports[13].config.max_in_hop_id = 9;
+ sw->ports[13].config.max_out_hop_id = 9;
+ sw->ports[13].cap_adap = -1;
+
+ sw->ports[14].config.type = TB_TYPE_DP_HDMI_OUT;
+ sw->ports[14].config.max_in_hop_id = 9;
+ sw->ports[14].config.max_out_hop_id = 9;
+ sw->ports[14].cap_adap = -1;
+
+ sw->ports[15].disabled = true;
+
+ sw->ports[16].config.type = TB_TYPE_USB3_UP;
+ sw->ports[16].config.max_in_hop_id = 8;
+ sw->ports[16].config.max_out_hop_id = 8;
+
+ sw->ports[17].config.type = TB_TYPE_USB3_DOWN;
+ sw->ports[17].config.max_in_hop_id = 8;
+ sw->ports[17].config.max_out_hop_id = 8;
+
+ sw->ports[18].config.type = TB_TYPE_USB3_DOWN;
+ sw->ports[18].config.max_in_hop_id = 8;
+ sw->ports[18].config.max_out_hop_id = 8;
+
+ sw->ports[19].config.type = TB_TYPE_USB3_DOWN;
+ sw->ports[19].config.max_in_hop_id = 8;
+ sw->ports[19].config.max_out_hop_id = 8;
+
+ if (!parent)
+ return sw;
+
+ /* Link them */
+ upstream_port = tb_upstream_port(sw);
+ port = tb_port_at(route, parent);
+ port->remote = upstream_port;
+ upstream_port->remote = port;
+ if (port->dual_link_port && upstream_port->dual_link_port) {
+ port->dual_link_port->remote = upstream_port->dual_link_port;
+ upstream_port->dual_link_port->remote = port->dual_link_port;
+ }
+
+ if (bonded) {
+ /* Bonding is used */
+ port->bonded = true;
+ port->dual_link_port->bonded = true;
+ upstream_port->bonded = true;
+ upstream_port->dual_link_port->bonded = true;
+ }
+
+ return sw;
+}
+
+static struct tb_switch *alloc_dev_with_dpin(struct kunit *test,
+ struct tb_switch *parent,
+ u64 route, bool bonded)
+{
+ struct tb_switch *sw;
+
+ sw = alloc_dev_default(test, parent, route, bonded);
+ if (!sw)
+ return NULL;
+
+ sw->ports[13].config.type = TB_TYPE_DP_HDMI_IN;
+ sw->ports[13].config.max_in_hop_id = 9;
+ sw->ports[13].config.max_out_hop_id = 9;
+
+ sw->ports[14].config.type = TB_TYPE_DP_HDMI_IN;
+ sw->ports[14].config.max_in_hop_id = 9;
+ sw->ports[14].config.max_out_hop_id = 9;
+
+ return sw;
+}
+
+static void tb_test_path_basic(struct kunit *test)
+{
+ struct tb_port *src_port, *dst_port, *p;
+ struct tb_switch *host;
+
+ host = alloc_host(test);
+
+ src_port = &host->ports[5];
+ dst_port = src_port;
+
+ p = tb_next_port_on_path(src_port, dst_port, NULL);
+ KUNIT_EXPECT_PTR_EQ(test, p, dst_port);
+
+ p = tb_next_port_on_path(src_port, dst_port, p);
+ KUNIT_EXPECT_TRUE(test, !p);
+}
+
+static void tb_test_path_not_connected_walk(struct kunit *test)
+{
+ struct tb_port *src_port, *dst_port, *p;
+ struct tb_switch *host, *dev;
+
+ host = alloc_host(test);
+ /* No connection between host and dev */
+ dev = alloc_dev_default(test, NULL, 3, true);
+
+ src_port = &host->ports[12];
+ dst_port = &dev->ports[16];
+
+ p = tb_next_port_on_path(src_port, dst_port, NULL);
+ KUNIT_EXPECT_PTR_EQ(test, p, src_port);
+
+ p = tb_next_port_on_path(src_port, dst_port, p);
+ KUNIT_EXPECT_PTR_EQ(test, p, &host->ports[3]);
+
+ p = tb_next_port_on_path(src_port, dst_port, p);
+ KUNIT_EXPECT_TRUE(test, !p);
+
+ /* Other direction */
+
+ p = tb_next_port_on_path(dst_port, src_port, NULL);
+ KUNIT_EXPECT_PTR_EQ(test, p, dst_port);
+
+ p = tb_next_port_on_path(dst_port, src_port, p);
+ KUNIT_EXPECT_PTR_EQ(test, p, &dev->ports[1]);
+
+ p = tb_next_port_on_path(dst_port, src_port, p);
+ KUNIT_EXPECT_TRUE(test, !p);
+}
+
+struct port_expectation {
+ u64 route;
+ u8 port;
+ enum tb_port_type type;
+};
+
+static void tb_test_path_single_hop_walk(struct kunit *test)
+{
+ /*
+ * Walks from Host PCIe downstream port to Device #1 PCIe
+ * upstream port.
+ *
+ * [Host]
+ * 1 |
+ * 1 |
+ * [Device]
+ */
+ static const struct port_expectation test_data[] = {
+ { .route = 0x0, .port = 8, .type = TB_TYPE_PCIE_DOWN },
+ { .route = 0x0, .port = 1, .type = TB_TYPE_PORT },
+ { .route = 0x1, .port = 1, .type = TB_TYPE_PORT },
+ { .route = 0x1, .port = 9, .type = TB_TYPE_PCIE_UP },
+ };
+ struct tb_port *src_port, *dst_port, *p;
+ struct tb_switch *host, *dev;
+ int i;
+
+ host = alloc_host(test);
+ dev = alloc_dev_default(test, host, 1, true);
+
+ src_port = &host->ports[8];
+ dst_port = &dev->ports[9];
+
+ /* Walk both directions */
+
+ i = 0;
+ tb_for_each_port_on_path(src_port, dst_port, p) {
+ KUNIT_EXPECT_TRUE(test, i < ARRAY_SIZE(test_data));
+ KUNIT_EXPECT_EQ(test, tb_route(p->sw), test_data[i].route);
+ KUNIT_EXPECT_EQ(test, p->port, test_data[i].port);
+ KUNIT_EXPECT_EQ(test, (enum tb_port_type)p->config.type,
+ test_data[i].type);
+ i++;
+ }
+
+ KUNIT_EXPECT_EQ(test, i, (int)ARRAY_SIZE(test_data));
+
+ i = ARRAY_SIZE(test_data) - 1;
+ tb_for_each_port_on_path(dst_port, src_port, p) {
+ KUNIT_EXPECT_TRUE(test, i < ARRAY_SIZE(test_data));
+ KUNIT_EXPECT_EQ(test, tb_route(p->sw), test_data[i].route);
+ KUNIT_EXPECT_EQ(test, p->port, test_data[i].port);
+ KUNIT_EXPECT_EQ(test, (enum tb_port_type)p->config.type,
+ test_data[i].type);
+ i--;
+ }
+
+ KUNIT_EXPECT_EQ(test, i, -1);
+}
+
+static void tb_test_path_daisy_chain_walk(struct kunit *test)
+{
+ /*
+ * Walks from Host DP IN to Device #2 DP OUT.
+ *
+ * [Host]
+ * 1 |
+ * 1 |
+ * [Device #1]
+ * 3 /
+ * 1 /
+ * [Device #2]
+ */
+ static const struct port_expectation test_data[] = {
+ { .route = 0x0, .port = 5, .type = TB_TYPE_DP_HDMI_IN },
+ { .route = 0x0, .port = 1, .type = TB_TYPE_PORT },
+ { .route = 0x1, .port = 1, .type = TB_TYPE_PORT },
+ { .route = 0x1, .port = 3, .type = TB_TYPE_PORT },
+ { .route = 0x301, .port = 1, .type = TB_TYPE_PORT },
+ { .route = 0x301, .port = 13, .type = TB_TYPE_DP_HDMI_OUT },
+ };
+ struct tb_port *src_port, *dst_port, *p;
+ struct tb_switch *host, *dev1, *dev2;
+ int i;
+
+ host = alloc_host(test);
+ dev1 = alloc_dev_default(test, host, 0x1, true);
+ dev2 = alloc_dev_default(test, dev1, 0x301, true);
+
+ src_port = &host->ports[5];
+ dst_port = &dev2->ports[13];
+
+ /* Walk both directions */
+
+ i = 0;
+ tb_for_each_port_on_path(src_port, dst_port, p) {
+ KUNIT_EXPECT_TRUE(test, i < ARRAY_SIZE(test_data));
+ KUNIT_EXPECT_EQ(test, tb_route(p->sw), test_data[i].route);
+ KUNIT_EXPECT_EQ(test, p->port, test_data[i].port);
+ KUNIT_EXPECT_EQ(test, (enum tb_port_type)p->config.type,
+ test_data[i].type);
+ i++;
+ }
+
+ KUNIT_EXPECT_EQ(test, i, (int)ARRAY_SIZE(test_data));
+
+ i = ARRAY_SIZE(test_data) - 1;
+ tb_for_each_port_on_path(dst_port, src_port, p) {
+ KUNIT_EXPECT_TRUE(test, i < ARRAY_SIZE(test_data));
+ KUNIT_EXPECT_EQ(test, tb_route(p->sw), test_data[i].route);
+ KUNIT_EXPECT_EQ(test, p->port, test_data[i].port);
+ KUNIT_EXPECT_EQ(test, (enum tb_port_type)p->config.type,
+ test_data[i].type);
+ i--;
+ }
+
+ KUNIT_EXPECT_EQ(test, i, -1);
+}
+
+static void tb_test_path_simple_tree_walk(struct kunit *test)
+{
+ /*
+ * Walks from Host DP IN to Device #3 DP OUT.
+ *
+ * [Host]
+ * 1 |
+ * 1 |
+ * [Device #1]
+ * 3 / | 5 \ 7
+ * 1 / | \ 1
+ * [Device #2] | [Device #4]
+ * | 1
+ * [Device #3]
+ */
+ static const struct port_expectation test_data[] = {
+ { .route = 0x0, .port = 5, .type = TB_TYPE_DP_HDMI_IN },
+ { .route = 0x0, .port = 1, .type = TB_TYPE_PORT },
+ { .route = 0x1, .port = 1, .type = TB_TYPE_PORT },
+ { .route = 0x1, .port = 5, .type = TB_TYPE_PORT },
+ { .route = 0x501, .port = 1, .type = TB_TYPE_PORT },
+ { .route = 0x501, .port = 13, .type = TB_TYPE_DP_HDMI_OUT },
+ };
+ struct tb_port *src_port, *dst_port, *p;
+ struct tb_switch *host, *dev1, *dev3;
+ int i;
+
+ host = alloc_host(test);
+ dev1 = alloc_dev_default(test, host, 0x1, true);
+ alloc_dev_default(test, dev1, 0x301, true);
+ dev3 = alloc_dev_default(test, dev1, 0x501, true);
+ alloc_dev_default(test, dev1, 0x701, true);
+
+ src_port = &host->ports[5];
+ dst_port = &dev3->ports[13];
+
+ /* Walk both directions */
+
+ i = 0;
+ tb_for_each_port_on_path(src_port, dst_port, p) {
+ KUNIT_EXPECT_TRUE(test, i < ARRAY_SIZE(test_data));
+ KUNIT_EXPECT_EQ(test, tb_route(p->sw), test_data[i].route);
+ KUNIT_EXPECT_EQ(test, p->port, test_data[i].port);
+ KUNIT_EXPECT_EQ(test, (enum tb_port_type)p->config.type,
+ test_data[i].type);
+ i++;
+ }
+
+ KUNIT_EXPECT_EQ(test, i, (int)ARRAY_SIZE(test_data));
+
+ i = ARRAY_SIZE(test_data) - 1;
+ tb_for_each_port_on_path(dst_port, src_port, p) {
+ KUNIT_EXPECT_TRUE(test, i < ARRAY_SIZE(test_data));
+ KUNIT_EXPECT_EQ(test, tb_route(p->sw), test_data[i].route);
+ KUNIT_EXPECT_EQ(test, p->port, test_data[i].port);
+ KUNIT_EXPECT_EQ(test, (enum tb_port_type)p->config.type,
+ test_data[i].type);
+ i--;
+ }
+
+ KUNIT_EXPECT_EQ(test, i, -1);
+}
+
+static void tb_test_path_complex_tree_walk(struct kunit *test)
+{
+ /*
+ * Walks from Device #3 DP IN to Device #9 DP OUT.
+ *
+ * [Host]
+ * 1 |
+ * 1 |
+ * [Device #1]
+ * 3 / | 5 \ 7
+ * 1 / | \ 1
+ * [Device #2] | [Device #5]
+ * 5 | | 1 \ 7
+ * 1 | [Device #4] \ 1
+ * [Device #3] [Device #6]
+ * 3 /
+ * 1 /
+ * [Device #7]
+ * 3 / | 5
+ * 1 / |
+ * [Device #8] | 1
+ * [Device #9]
+ */
+ static const struct port_expectation test_data[] = {
+ { .route = 0x50301, .port = 13, .type = TB_TYPE_DP_HDMI_IN },
+ { .route = 0x50301, .port = 1, .type = TB_TYPE_PORT },
+ { .route = 0x301, .port = 5, .type = TB_TYPE_PORT },
+ { .route = 0x301, .port = 1, .type = TB_TYPE_PORT },
+ { .route = 0x1, .port = 3, .type = TB_TYPE_PORT },
+ { .route = 0x1, .port = 7, .type = TB_TYPE_PORT },
+ { .route = 0x701, .port = 1, .type = TB_TYPE_PORT },
+ { .route = 0x701, .port = 7, .type = TB_TYPE_PORT },
+ { .route = 0x70701, .port = 1, .type = TB_TYPE_PORT },
+ { .route = 0x70701, .port = 3, .type = TB_TYPE_PORT },
+ { .route = 0x3070701, .port = 1, .type = TB_TYPE_PORT },
+ { .route = 0x3070701, .port = 5, .type = TB_TYPE_PORT },
+ { .route = 0x503070701, .port = 1, .type = TB_TYPE_PORT },
+ { .route = 0x503070701, .port = 14, .type = TB_TYPE_DP_HDMI_OUT },
+ };
+ struct tb_switch *host, *dev1, *dev2, *dev3, *dev5, *dev6, *dev7, *dev9;
+ struct tb_port *src_port, *dst_port, *p;
+ int i;
+
+ host = alloc_host(test);
+ dev1 = alloc_dev_default(test, host, 0x1, true);
+ dev2 = alloc_dev_default(test, dev1, 0x301, true);
+ dev3 = alloc_dev_with_dpin(test, dev2, 0x50301, true);
+ alloc_dev_default(test, dev1, 0x501, true);
+ dev5 = alloc_dev_default(test, dev1, 0x701, true);
+ dev6 = alloc_dev_default(test, dev5, 0x70701, true);
+ dev7 = alloc_dev_default(test, dev6, 0x3070701, true);
+ alloc_dev_default(test, dev7, 0x303070701, true);
+ dev9 = alloc_dev_default(test, dev7, 0x503070701, true);
+
+ src_port = &dev3->ports[13];
+ dst_port = &dev9->ports[14];
+
+ /* Walk both directions */
+
+ i = 0;
+ tb_for_each_port_on_path(src_port, dst_port, p) {
+ KUNIT_EXPECT_TRUE(test, i < ARRAY_SIZE(test_data));
+ KUNIT_EXPECT_EQ(test, tb_route(p->sw), test_data[i].route);
+ KUNIT_EXPECT_EQ(test, p->port, test_data[i].port);
+ KUNIT_EXPECT_EQ(test, (enum tb_port_type)p->config.type,
+ test_data[i].type);
+ i++;
+ }
+
+ KUNIT_EXPECT_EQ(test, i, (int)ARRAY_SIZE(test_data));
+
+ i = ARRAY_SIZE(test_data) - 1;
+ tb_for_each_port_on_path(dst_port, src_port, p) {
+ KUNIT_EXPECT_TRUE(test, i < ARRAY_SIZE(test_data));
+ KUNIT_EXPECT_EQ(test, tb_route(p->sw), test_data[i].route);
+ KUNIT_EXPECT_EQ(test, p->port, test_data[i].port);
+ KUNIT_EXPECT_EQ(test, (enum tb_port_type)p->config.type,
+ test_data[i].type);
+ i--;
+ }
+
+ KUNIT_EXPECT_EQ(test, i, -1);
+}
+
+static void tb_test_path_max_length_walk(struct kunit *test)
+{
+ struct tb_switch *host, *dev1, *dev2, *dev3, *dev4, *dev5, *dev6;
+ struct tb_switch *dev7, *dev8, *dev9, *dev10, *dev11, *dev12;
+ struct tb_port *src_port, *dst_port, *p;
+ int i;
+
+ /*
+ * Walks from Device #6 DP IN to Device #12 DP OUT.
+ *
+ * [Host]
+ * 1 / \ 3
+ * 1 / \ 1
+ * [Device #1] [Device #7]
+ * 3 | | 3
+ * 1 | | 1
+ * [Device #2] [Device #8]
+ * 3 | | 3
+ * 1 | | 1
+ * [Device #3] [Device #9]
+ * 3 | | 3
+ * 1 | | 1
+ * [Device #4] [Device #10]
+ * 3 | | 3
+ * 1 | | 1
+ * [Device #5] [Device #11]
+ * 3 | | 3
+ * 1 | | 1
+ * [Device #6] [Device #12]
+ */
+ static const struct port_expectation test_data[] = {
+ { .route = 0x30303030301, .port = 13, .type = TB_TYPE_DP_HDMI_IN },
+ { .route = 0x30303030301, .port = 1, .type = TB_TYPE_PORT },
+ { .route = 0x303030301, .port = 3, .type = TB_TYPE_PORT },
+ { .route = 0x303030301, .port = 1, .type = TB_TYPE_PORT },
+ { .route = 0x3030301, .port = 3, .type = TB_TYPE_PORT },
+ { .route = 0x3030301, .port = 1, .type = TB_TYPE_PORT },
+ { .route = 0x30301, .port = 3, .type = TB_TYPE_PORT },
+ { .route = 0x30301, .port = 1, .type = TB_TYPE_PORT },
+ { .route = 0x301, .port = 3, .type = TB_TYPE_PORT },
+ { .route = 0x301, .port = 1, .type = TB_TYPE_PORT },
+ { .route = 0x1, .port = 3, .type = TB_TYPE_PORT },
+ { .route = 0x1, .port = 1, .type = TB_TYPE_PORT },
+ { .route = 0x0, .port = 1, .type = TB_TYPE_PORT },
+ { .route = 0x0, .port = 3, .type = TB_TYPE_PORT },
+ { .route = 0x3, .port = 1, .type = TB_TYPE_PORT },
+ { .route = 0x3, .port = 3, .type = TB_TYPE_PORT },
+ { .route = 0x303, .port = 1, .type = TB_TYPE_PORT },
+ { .route = 0x303, .port = 3, .type = TB_TYPE_PORT },
+ { .route = 0x30303, .port = 1, .type = TB_TYPE_PORT },
+ { .route = 0x30303, .port = 3, .type = TB_TYPE_PORT },
+ { .route = 0x3030303, .port = 1, .type = TB_TYPE_PORT },
+ { .route = 0x3030303, .port = 3, .type = TB_TYPE_PORT },
+ { .route = 0x303030303, .port = 1, .type = TB_TYPE_PORT },
+ { .route = 0x303030303, .port = 3, .type = TB_TYPE_PORT },
+ { .route = 0x30303030303, .port = 1, .type = TB_TYPE_PORT },
+ { .route = 0x30303030303, .port = 13, .type = TB_TYPE_DP_HDMI_OUT },
+ };
+
+ host = alloc_host(test);
+ dev1 = alloc_dev_default(test, host, 0x1, true);
+ dev2 = alloc_dev_default(test, dev1, 0x301, true);
+ dev3 = alloc_dev_default(test, dev2, 0x30301, true);
+ dev4 = alloc_dev_default(test, dev3, 0x3030301, true);
+ dev5 = alloc_dev_default(test, dev4, 0x303030301, true);
+ dev6 = alloc_dev_with_dpin(test, dev5, 0x30303030301, true);
+ dev7 = alloc_dev_default(test, host, 0x3, true);
+ dev8 = alloc_dev_default(test, dev7, 0x303, true);
+ dev9 = alloc_dev_default(test, dev8, 0x30303, true);
+ dev10 = alloc_dev_default(test, dev9, 0x3030303, true);
+ dev11 = alloc_dev_default(test, dev10, 0x303030303, true);
+ dev12 = alloc_dev_default(test, dev11, 0x30303030303, true);
+
+ src_port = &dev6->ports[13];
+ dst_port = &dev12->ports[13];
+
+ /* Walk both directions */
+
+ i = 0;
+ tb_for_each_port_on_path(src_port, dst_port, p) {
+ KUNIT_EXPECT_TRUE(test, i < ARRAY_SIZE(test_data));
+ KUNIT_EXPECT_EQ(test, tb_route(p->sw), test_data[i].route);
+ KUNIT_EXPECT_EQ(test, p->port, test_data[i].port);
+ KUNIT_EXPECT_EQ(test, (enum tb_port_type)p->config.type,
+ test_data[i].type);
+ i++;
+ }
+
+ KUNIT_EXPECT_EQ(test, i, (int)ARRAY_SIZE(test_data));
+
+ i = ARRAY_SIZE(test_data) - 1;
+ tb_for_each_port_on_path(dst_port, src_port, p) {
+ KUNIT_EXPECT_TRUE(test, i < ARRAY_SIZE(test_data));
+ KUNIT_EXPECT_EQ(test, tb_route(p->sw), test_data[i].route);
+ KUNIT_EXPECT_EQ(test, p->port, test_data[i].port);
+ KUNIT_EXPECT_EQ(test, (enum tb_port_type)p->config.type,
+ test_data[i].type);
+ i--;
+ }
+
+ KUNIT_EXPECT_EQ(test, i, -1);
+}
+
+static void tb_test_path_not_connected(struct kunit *test)
+{
+ struct tb_switch *host, *dev1, *dev2;
+ struct tb_port *down, *up;
+ struct tb_path *path;
+
+ host = alloc_host(test);
+ dev1 = alloc_dev_default(test, host, 0x3, false);
+ /* Not connected to anything */
+ dev2 = alloc_dev_default(test, NULL, 0x303, false);
+
+ down = &dev1->ports[10];
+ up = &dev2->ports[9];
+
+ path = tb_path_alloc(NULL, down, 8, up, 8, 0, "PCIe Down");
+ KUNIT_ASSERT_TRUE(test, path == NULL);
+ path = tb_path_alloc(NULL, down, 8, up, 8, 1, "PCIe Down");
+ KUNIT_ASSERT_TRUE(test, path == NULL);
+}
+
+struct hop_expectation {
+ u64 route;
+ u8 in_port;
+ enum tb_port_type in_type;
+ u8 out_port;
+ enum tb_port_type out_type;
+};
+
+static void tb_test_path_not_bonded_lane0(struct kunit *test)
+{
+ /*
+ * PCIe path from host to device using lane 0.
+ *
+ * [Host]
+ * 3 |: 4
+ * 1 |: 2
+ * [Device]
+ */
+ static const struct hop_expectation test_data[] = {
+ {
+ .route = 0x0,
+ .in_port = 9,
+ .in_type = TB_TYPE_PCIE_DOWN,
+ .out_port = 3,
+ .out_type = TB_TYPE_PORT,
+ },
+ {
+ .route = 0x3,
+ .in_port = 1,
+ .in_type = TB_TYPE_PORT,
+ .out_port = 9,
+ .out_type = TB_TYPE_PCIE_UP,
+ },
+ };
+ struct tb_switch *host, *dev;
+ struct tb_port *down, *up;
+ struct tb_path *path;
+ int i;
+
+ host = alloc_host(test);
+ dev = alloc_dev_default(test, host, 0x3, false);
+
+ down = &host->ports[9];
+ up = &dev->ports[9];
+
+ path = tb_path_alloc(NULL, down, 8, up, 8, 0, "PCIe Down");
+ KUNIT_ASSERT_TRUE(test, path != NULL);
+ KUNIT_ASSERT_EQ(test, path->path_length, (int)ARRAY_SIZE(test_data));
+ for (i = 0; i < ARRAY_SIZE(test_data); i++) {
+ const struct tb_port *in_port, *out_port;
+
+ in_port = path->hops[i].in_port;
+ out_port = path->hops[i].out_port;
+
+ KUNIT_EXPECT_EQ(test, tb_route(in_port->sw), test_data[i].route);
+ KUNIT_EXPECT_EQ(test, in_port->port, test_data[i].in_port);
+ KUNIT_EXPECT_EQ(test, (enum tb_port_type)in_port->config.type,
+ test_data[i].in_type);
+ KUNIT_EXPECT_EQ(test, tb_route(out_port->sw), test_data[i].route);
+ KUNIT_EXPECT_EQ(test, out_port->port, test_data[i].out_port);
+ KUNIT_EXPECT_EQ(test, (enum tb_port_type)out_port->config.type,
+ test_data[i].out_type);
+ }
+ tb_path_free(path);
+}
+
+static void tb_test_path_not_bonded_lane1(struct kunit *test)
+{
+ /*
+ * DP Video path from host to device using lane 1. Paths like
+ * these are only used with Thunderbolt 1 devices where lane
+ * bonding is not possible. USB4 specifically does not allow
+ * paths like this (you either use lane 0 where lane 1 is
+ * disabled or both lanes are bonded).
+ *
+ * [Host]
+ * 1 :| 2
+ * 1 :| 2
+ * [Device]
+ */
+ static const struct hop_expectation test_data[] = {
+ {
+ .route = 0x0,
+ .in_port = 5,
+ .in_type = TB_TYPE_DP_HDMI_IN,
+ .out_port = 2,
+ .out_type = TB_TYPE_PORT,
+ },
+ {
+ .route = 0x1,
+ .in_port = 2,
+ .in_type = TB_TYPE_PORT,
+ .out_port = 13,
+ .out_type = TB_TYPE_DP_HDMI_OUT,
+ },
+ };
+ struct tb_switch *host, *dev;
+ struct tb_port *in, *out;
+ struct tb_path *path;
+ int i;
+
+ host = alloc_host(test);
+ dev = alloc_dev_default(test, host, 0x1, false);
+
+ in = &host->ports[5];
+ out = &dev->ports[13];
+
+ path = tb_path_alloc(NULL, in, 9, out, 9, 1, "Video");
+ KUNIT_ASSERT_TRUE(test, path != NULL);
+ KUNIT_ASSERT_EQ(test, path->path_length, (int)ARRAY_SIZE(test_data));
+ for (i = 0; i < ARRAY_SIZE(test_data); i++) {
+ const struct tb_port *in_port, *out_port;
+
+ in_port = path->hops[i].in_port;
+ out_port = path->hops[i].out_port;
+
+ KUNIT_EXPECT_EQ(test, tb_route(in_port->sw), test_data[i].route);
+ KUNIT_EXPECT_EQ(test, in_port->port, test_data[i].in_port);
+ KUNIT_EXPECT_EQ(test, (enum tb_port_type)in_port->config.type,
+ test_data[i].in_type);
+ KUNIT_EXPECT_EQ(test, tb_route(out_port->sw), test_data[i].route);
+ KUNIT_EXPECT_EQ(test, out_port->port, test_data[i].out_port);
+ KUNIT_EXPECT_EQ(test, (enum tb_port_type)out_port->config.type,
+ test_data[i].out_type);
+ }
+ tb_path_free(path);
+}
+
+static void tb_test_path_not_bonded_lane1_chain(struct kunit *test)
+{
+ /*
+ * DP Video path from host to device 3 using lane 1.
+ *
+ * [Host]
+ * 1 :| 2
+ * 1 :| 2
+ * [Device #1]
+ * 7 :| 8
+ * 1 :| 2
+ * [Device #2]
+ * 5 :| 6
+ * 1 :| 2
+ * [Device #3]
+ */
+ static const struct hop_expectation test_data[] = {
+ {
+ .route = 0x0,
+ .in_port = 5,
+ .in_type = TB_TYPE_DP_HDMI_IN,
+ .out_port = 2,
+ .out_type = TB_TYPE_PORT,
+ },
+ {
+ .route = 0x1,
+ .in_port = 2,
+ .in_type = TB_TYPE_PORT,
+ .out_port = 8,
+ .out_type = TB_TYPE_PORT,
+ },
+ {
+ .route = 0x701,
+ .in_port = 2,
+ .in_type = TB_TYPE_PORT,
+ .out_port = 6,
+ .out_type = TB_TYPE_PORT,
+ },
+ {
+ .route = 0x50701,
+ .in_port = 2,
+ .in_type = TB_TYPE_PORT,
+ .out_port = 13,
+ .out_type = TB_TYPE_DP_HDMI_OUT,
+ },
+ };
+ struct tb_switch *host, *dev1, *dev2, *dev3;
+ struct tb_port *in, *out;
+ struct tb_path *path;
+ int i;
+
+ host = alloc_host(test);
+ dev1 = alloc_dev_default(test, host, 0x1, false);
+ dev2 = alloc_dev_default(test, dev1, 0x701, false);
+ dev3 = alloc_dev_default(test, dev2, 0x50701, false);
+
+ in = &host->ports[5];
+ out = &dev3->ports[13];
+
+ path = tb_path_alloc(NULL, in, 9, out, 9, 1, "Video");
+ KUNIT_ASSERT_TRUE(test, path != NULL);
+ KUNIT_ASSERT_EQ(test, path->path_length, (int)ARRAY_SIZE(test_data));
+ for (i = 0; i < ARRAY_SIZE(test_data); i++) {
+ const struct tb_port *in_port, *out_port;
+
+ in_port = path->hops[i].in_port;
+ out_port = path->hops[i].out_port;
+
+ KUNIT_EXPECT_EQ(test, tb_route(in_port->sw), test_data[i].route);
+ KUNIT_EXPECT_EQ(test, in_port->port, test_data[i].in_port);
+ KUNIT_EXPECT_EQ(test, (enum tb_port_type)in_port->config.type,
+ test_data[i].in_type);
+ KUNIT_EXPECT_EQ(test, tb_route(out_port->sw), test_data[i].route);
+ KUNIT_EXPECT_EQ(test, out_port->port, test_data[i].out_port);
+ KUNIT_EXPECT_EQ(test, (enum tb_port_type)out_port->config.type,
+ test_data[i].out_type);
+ }
+ tb_path_free(path);
+}
+
+static void tb_test_path_not_bonded_lane1_chain_reverse(struct kunit *test)
+{
+ /*
+ * DP Video path from device 3 to host using lane 1.
+ *
+ * [Host]
+ * 1 :| 2
+ * 1 :| 2
+ * [Device #1]
+ * 7 :| 8
+ * 1 :| 2
+ * [Device #2]
+ * 5 :| 6
+ * 1 :| 2
+ * [Device #3]
+ */
+ static const struct hop_expectation test_data[] = {
+ {
+ .route = 0x50701,
+ .in_port = 13,
+ .in_type = TB_TYPE_DP_HDMI_IN,
+ .out_port = 2,
+ .out_type = TB_TYPE_PORT,
+ },
+ {
+ .route = 0x701,
+ .in_port = 6,
+ .in_type = TB_TYPE_PORT,
+ .out_port = 2,
+ .out_type = TB_TYPE_PORT,
+ },
+ {
+ .route = 0x1,
+ .in_port = 8,
+ .in_type = TB_TYPE_PORT,
+ .out_port = 2,
+ .out_type = TB_TYPE_PORT,
+ },
+ {
+ .route = 0x0,
+ .in_port = 2,
+ .in_type = TB_TYPE_PORT,
+ .out_port = 5,
+ .out_type = TB_TYPE_DP_HDMI_IN,
+ },
+ };
+ struct tb_switch *host, *dev1, *dev2, *dev3;
+ struct tb_port *in, *out;
+ struct tb_path *path;
+ int i;
+
+ host = alloc_host(test);
+ dev1 = alloc_dev_default(test, host, 0x1, false);
+ dev2 = alloc_dev_default(test, dev1, 0x701, false);
+ dev3 = alloc_dev_with_dpin(test, dev2, 0x50701, false);
+
+ in = &dev3->ports[13];
+ out = &host->ports[5];
+
+ path = tb_path_alloc(NULL, in, 9, out, 9, 1, "Video");
+ KUNIT_ASSERT_TRUE(test, path != NULL);
+ KUNIT_ASSERT_EQ(test, path->path_length, (int)ARRAY_SIZE(test_data));
+ for (i = 0; i < ARRAY_SIZE(test_data); i++) {
+ const struct tb_port *in_port, *out_port;
+
+ in_port = path->hops[i].in_port;
+ out_port = path->hops[i].out_port;
+
+ KUNIT_EXPECT_EQ(test, tb_route(in_port->sw), test_data[i].route);
+ KUNIT_EXPECT_EQ(test, in_port->port, test_data[i].in_port);
+ KUNIT_EXPECT_EQ(test, (enum tb_port_type)in_port->config.type,
+ test_data[i].in_type);
+ KUNIT_EXPECT_EQ(test, tb_route(out_port->sw), test_data[i].route);
+ KUNIT_EXPECT_EQ(test, out_port->port, test_data[i].out_port);
+ KUNIT_EXPECT_EQ(test, (enum tb_port_type)out_port->config.type,
+ test_data[i].out_type);
+ }
+ tb_path_free(path);
+}
+
+static void tb_test_path_mixed_chain(struct kunit *test)
+{
+ /*
+ * DP Video path from host to device 4 where first and last link
+ * is bonded.
+ *
+ * [Host]
+ * 1 |
+ * 1 |
+ * [Device #1]
+ * 7 :| 8
+ * 1 :| 2
+ * [Device #2]
+ * 5 :| 6
+ * 1 :| 2
+ * [Device #3]
+ * 3 |
+ * 1 |
+ * [Device #4]
+ */
+ static const struct hop_expectation test_data[] = {
+ {
+ .route = 0x0,
+ .in_port = 5,
+ .in_type = TB_TYPE_DP_HDMI_IN,
+ .out_port = 1,
+ .out_type = TB_TYPE_PORT,
+ },
+ {
+ .route = 0x1,
+ .in_port = 1,
+ .in_type = TB_TYPE_PORT,
+ .out_port = 8,
+ .out_type = TB_TYPE_PORT,
+ },
+ {
+ .route = 0x701,
+ .in_port = 2,
+ .in_type = TB_TYPE_PORT,
+ .out_port = 6,
+ .out_type = TB_TYPE_PORT,
+ },
+ {
+ .route = 0x50701,
+ .in_port = 2,
+ .in_type = TB_TYPE_PORT,
+ .out_port = 3,
+ .out_type = TB_TYPE_PORT,
+ },
+ {
+ .route = 0x3050701,
+ .in_port = 1,
+ .in_type = TB_TYPE_PORT,
+ .out_port = 13,
+ .out_type = TB_TYPE_DP_HDMI_OUT,
+ },
+ };
+ struct tb_switch *host, *dev1, *dev2, *dev3, *dev4;
+ struct tb_port *in, *out;
+ struct tb_path *path;
+ int i;
+
+ host = alloc_host(test);
+ dev1 = alloc_dev_default(test, host, 0x1, true);
+ dev2 = alloc_dev_default(test, dev1, 0x701, false);
+ dev3 = alloc_dev_default(test, dev2, 0x50701, false);
+ dev4 = alloc_dev_default(test, dev3, 0x3050701, true);
+
+ in = &host->ports[5];
+ out = &dev4->ports[13];
+
+ path = tb_path_alloc(NULL, in, 9, out, 9, 1, "Video");
+ KUNIT_ASSERT_TRUE(test, path != NULL);
+ KUNIT_ASSERT_EQ(test, path->path_length, (int)ARRAY_SIZE(test_data));
+ for (i = 0; i < ARRAY_SIZE(test_data); i++) {
+ const struct tb_port *in_port, *out_port;
+
+ in_port = path->hops[i].in_port;
+ out_port = path->hops[i].out_port;
+
+ KUNIT_EXPECT_EQ(test, tb_route(in_port->sw), test_data[i].route);
+ KUNIT_EXPECT_EQ(test, in_port->port, test_data[i].in_port);
+ KUNIT_EXPECT_EQ(test, (enum tb_port_type)in_port->config.type,
+ test_data[i].in_type);
+ KUNIT_EXPECT_EQ(test, tb_route(out_port->sw), test_data[i].route);
+ KUNIT_EXPECT_EQ(test, out_port->port, test_data[i].out_port);
+ KUNIT_EXPECT_EQ(test, (enum tb_port_type)out_port->config.type,
+ test_data[i].out_type);
+ }
+ tb_path_free(path);
+}
+
+static void tb_test_path_mixed_chain_reverse(struct kunit *test)
+{
+ /*
+ * DP Video path from device 4 to host where first and last link
+ * is bonded.
+ *
+ * [Host]
+ * 1 |
+ * 1 |
+ * [Device #1]
+ * 7 :| 8
+ * 1 :| 2
+ * [Device #2]
+ * 5 :| 6
+ * 1 :| 2
+ * [Device #3]
+ * 3 |
+ * 1 |
+ * [Device #4]
+ */
+ static const struct hop_expectation test_data[] = {
+ {
+ .route = 0x3050701,
+ .in_port = 13,
+ .in_type = TB_TYPE_DP_HDMI_OUT,
+ .out_port = 1,
+ .out_type = TB_TYPE_PORT,
+ },
+ {
+ .route = 0x50701,
+ .in_port = 3,
+ .in_type = TB_TYPE_PORT,
+ .out_port = 2,
+ .out_type = TB_TYPE_PORT,
+ },
+ {
+ .route = 0x701,
+ .in_port = 6,
+ .in_type = TB_TYPE_PORT,
+ .out_port = 2,
+ .out_type = TB_TYPE_PORT,
+ },
+ {
+ .route = 0x1,
+ .in_port = 8,
+ .in_type = TB_TYPE_PORT,
+ .out_port = 1,
+ .out_type = TB_TYPE_PORT,
+ },
+ {
+ .route = 0x0,
+ .in_port = 1,
+ .in_type = TB_TYPE_PORT,
+ .out_port = 5,
+ .out_type = TB_TYPE_DP_HDMI_IN,
+ },
+ };
+ struct tb_switch *host, *dev1, *dev2, *dev3, *dev4;
+ struct tb_port *in, *out;
+ struct tb_path *path;
+ int i;
+
+ host = alloc_host(test);
+ dev1 = alloc_dev_default(test, host, 0x1, true);
+ dev2 = alloc_dev_default(test, dev1, 0x701, false);
+ dev3 = alloc_dev_default(test, dev2, 0x50701, false);
+ dev4 = alloc_dev_default(test, dev3, 0x3050701, true);
+
+ in = &dev4->ports[13];
+ out = &host->ports[5];
+
+ path = tb_path_alloc(NULL, in, 9, out, 9, 1, "Video");
+ KUNIT_ASSERT_TRUE(test, path != NULL);
+ KUNIT_ASSERT_EQ(test, path->path_length, (int)ARRAY_SIZE(test_data));
+ for (i = 0; i < ARRAY_SIZE(test_data); i++) {
+ const struct tb_port *in_port, *out_port;
+
+ in_port = path->hops[i].in_port;
+ out_port = path->hops[i].out_port;
+
+ KUNIT_EXPECT_EQ(test, tb_route(in_port->sw), test_data[i].route);
+ KUNIT_EXPECT_EQ(test, in_port->port, test_data[i].in_port);
+ KUNIT_EXPECT_EQ(test, (enum tb_port_type)in_port->config.type,
+ test_data[i].in_type);
+ KUNIT_EXPECT_EQ(test, tb_route(out_port->sw), test_data[i].route);
+ KUNIT_EXPECT_EQ(test, out_port->port, test_data[i].out_port);
+ KUNIT_EXPECT_EQ(test, (enum tb_port_type)out_port->config.type,
+ test_data[i].out_type);
+ }
+ tb_path_free(path);
+}
+
+static void tb_test_tunnel_pcie(struct kunit *test)
+{
+ struct tb_switch *host, *dev1, *dev2;
+ struct tb_tunnel *tunnel1, *tunnel2;
+ struct tb_port *down, *up;
+
+ /*
+ * Create PCIe tunnel between host and two devices.
+ *
+ * [Host]
+ * 1 |
+ * 1 |
+ * [Device #1]
+ * 5 |
+ * 1 |
+ * [Device #2]
+ */
+ host = alloc_host(test);
+ dev1 = alloc_dev_default(test, host, 0x1, true);
+ dev2 = alloc_dev_default(test, dev1, 0x501, true);
+
+ down = &host->ports[8];
+ up = &dev1->ports[9];
+ tunnel1 = tb_tunnel_alloc_pci(NULL, up, down);
+ KUNIT_ASSERT_TRUE(test, tunnel1 != NULL);
+ KUNIT_EXPECT_EQ(test, tunnel1->type, (enum tb_tunnel_type)TB_TUNNEL_PCI);
+ KUNIT_EXPECT_PTR_EQ(test, tunnel1->src_port, down);
+ KUNIT_EXPECT_PTR_EQ(test, tunnel1->dst_port, up);
+ KUNIT_ASSERT_EQ(test, tunnel1->npaths, (size_t)2);
+ KUNIT_ASSERT_EQ(test, tunnel1->paths[0]->path_length, 2);
+ KUNIT_EXPECT_PTR_EQ(test, tunnel1->paths[0]->hops[0].in_port, down);
+ KUNIT_EXPECT_PTR_EQ(test, tunnel1->paths[0]->hops[1].out_port, up);
+ KUNIT_ASSERT_EQ(test, tunnel1->paths[1]->path_length, 2);
+ KUNIT_EXPECT_PTR_EQ(test, tunnel1->paths[1]->hops[0].in_port, up);
+ KUNIT_EXPECT_PTR_EQ(test, tunnel1->paths[1]->hops[1].out_port, down);
+
+ down = &dev1->ports[10];
+ up = &dev2->ports[9];
+ tunnel2 = tb_tunnel_alloc_pci(NULL, up, down);
+ KUNIT_ASSERT_TRUE(test, tunnel2 != NULL);
+ KUNIT_EXPECT_EQ(test, tunnel2->type, (enum tb_tunnel_type)TB_TUNNEL_PCI);
+ KUNIT_EXPECT_PTR_EQ(test, tunnel2->src_port, down);
+ KUNIT_EXPECT_PTR_EQ(test, tunnel2->dst_port, up);
+ KUNIT_ASSERT_EQ(test, tunnel2->npaths, (size_t)2);
+ KUNIT_ASSERT_EQ(test, tunnel2->paths[0]->path_length, 2);
+ KUNIT_EXPECT_PTR_EQ(test, tunnel2->paths[0]->hops[0].in_port, down);
+ KUNIT_EXPECT_PTR_EQ(test, tunnel2->paths[0]->hops[1].out_port, up);
+ KUNIT_ASSERT_EQ(test, tunnel2->paths[1]->path_length, 2);
+ KUNIT_EXPECT_PTR_EQ(test, tunnel2->paths[1]->hops[0].in_port, up);
+ KUNIT_EXPECT_PTR_EQ(test, tunnel2->paths[1]->hops[1].out_port, down);
+
+ tb_tunnel_free(tunnel2);
+ tb_tunnel_free(tunnel1);
+}
+
+static void tb_test_tunnel_dp(struct kunit *test)
+{
+ struct tb_switch *host, *dev;
+ struct tb_port *in, *out;
+ struct tb_tunnel *tunnel;
+
+ /*
+ * Create DP tunnel between Host and Device
+ *
+ * [Host]
+ * 1 |
+ * 1 |
+ * [Device]
+ */
+ host = alloc_host(test);
+ dev = alloc_dev_default(test, host, 0x3, true);
+
+ in = &host->ports[5];
+ out = &dev->ports[13];
+
+ tunnel = tb_tunnel_alloc_dp(NULL, in, out, 0, 0);
+ KUNIT_ASSERT_TRUE(test, tunnel != NULL);
+ KUNIT_EXPECT_EQ(test, tunnel->type, (enum tb_tunnel_type)TB_TUNNEL_DP);
+ KUNIT_EXPECT_PTR_EQ(test, tunnel->src_port, in);
+ KUNIT_EXPECT_PTR_EQ(test, tunnel->dst_port, out);
+ KUNIT_ASSERT_EQ(test, tunnel->npaths, (size_t)3);
+ KUNIT_ASSERT_EQ(test, tunnel->paths[0]->path_length, 2);
+ KUNIT_EXPECT_PTR_EQ(test, tunnel->paths[0]->hops[0].in_port, in);
+ KUNIT_EXPECT_PTR_EQ(test, tunnel->paths[0]->hops[1].out_port, out);
+ KUNIT_ASSERT_EQ(test, tunnel->paths[1]->path_length, 2);
+ KUNIT_EXPECT_PTR_EQ(test, tunnel->paths[1]->hops[0].in_port, in);
+ KUNIT_EXPECT_PTR_EQ(test, tunnel->paths[1]->hops[1].out_port, out);
+ KUNIT_ASSERT_EQ(test, tunnel->paths[2]->path_length, 2);
+ KUNIT_EXPECT_PTR_EQ(test, tunnel->paths[2]->hops[0].in_port, out);
+ KUNIT_EXPECT_PTR_EQ(test, tunnel->paths[2]->hops[1].out_port, in);
+ tb_tunnel_free(tunnel);
+}
+
+static void tb_test_tunnel_dp_chain(struct kunit *test)
+{
+ struct tb_switch *host, *dev1, *dev4;
+ struct tb_port *in, *out;
+ struct tb_tunnel *tunnel;
+
+ /*
+ * Create DP tunnel from Host DP IN to Device #4 DP OUT.
+ *
+ * [Host]
+ * 1 |
+ * 1 |
+ * [Device #1]
+ * 3 / | 5 \ 7
+ * 1 / | \ 1
+ * [Device #2] | [Device #4]
+ * | 1
+ * [Device #3]
+ */
+ host = alloc_host(test);
+ dev1 = alloc_dev_default(test, host, 0x1, true);
+ alloc_dev_default(test, dev1, 0x301, true);
+ alloc_dev_default(test, dev1, 0x501, true);
+ dev4 = alloc_dev_default(test, dev1, 0x701, true);
+
+ in = &host->ports[5];
+ out = &dev4->ports[14];
+
+ tunnel = tb_tunnel_alloc_dp(NULL, in, out, 0, 0);
+ KUNIT_ASSERT_TRUE(test, tunnel != NULL);
+ KUNIT_EXPECT_EQ(test, tunnel->type, (enum tb_tunnel_type)TB_TUNNEL_DP);
+ KUNIT_EXPECT_PTR_EQ(test, tunnel->src_port, in);
+ KUNIT_EXPECT_PTR_EQ(test, tunnel->dst_port, out);
+ KUNIT_ASSERT_EQ(test, tunnel->npaths, (size_t)3);
+ KUNIT_ASSERT_EQ(test, tunnel->paths[0]->path_length, 3);
+ KUNIT_EXPECT_PTR_EQ(test, tunnel->paths[0]->hops[0].in_port, in);
+ KUNIT_EXPECT_PTR_EQ(test, tunnel->paths[0]->hops[2].out_port, out);
+ KUNIT_ASSERT_EQ(test, tunnel->paths[1]->path_length, 3);
+ KUNIT_EXPECT_PTR_EQ(test, tunnel->paths[1]->hops[0].in_port, in);
+ KUNIT_EXPECT_PTR_EQ(test, tunnel->paths[1]->hops[2].out_port, out);
+ KUNIT_ASSERT_EQ(test, tunnel->paths[2]->path_length, 3);
+ KUNIT_EXPECT_PTR_EQ(test, tunnel->paths[2]->hops[0].in_port, out);
+ KUNIT_EXPECT_PTR_EQ(test, tunnel->paths[2]->hops[2].out_port, in);
+ tb_tunnel_free(tunnel);
+}
+
+static void tb_test_tunnel_dp_tree(struct kunit *test)
+{
+ struct tb_switch *host, *dev1, *dev2, *dev3, *dev5;
+ struct tb_port *in, *out;
+ struct tb_tunnel *tunnel;
+
+ /*
+ * Create DP tunnel from Device #2 DP IN to Device #5 DP OUT.
+ *
+ * [Host]
+ * 3 |
+ * 1 |
+ * [Device #1]
+ * 3 / | 5 \ 7
+ * 1 / | \ 1
+ * [Device #2] | [Device #4]
+ * | 1
+ * [Device #3]
+ * | 5
+ * | 1
+ * [Device #5]
+ */
+ host = alloc_host(test);
+ dev1 = alloc_dev_default(test, host, 0x3, true);
+ dev2 = alloc_dev_with_dpin(test, dev1, 0x303, true);
+ dev3 = alloc_dev_default(test, dev1, 0x503, true);
+ alloc_dev_default(test, dev1, 0x703, true);
+ dev5 = alloc_dev_default(test, dev3, 0x50503, true);
+
+ in = &dev2->ports[13];
+ out = &dev5->ports[13];
+
+ tunnel = tb_tunnel_alloc_dp(NULL, in, out, 0, 0);
+ KUNIT_ASSERT_TRUE(test, tunnel != NULL);
+ KUNIT_EXPECT_EQ(test, tunnel->type, (enum tb_tunnel_type)TB_TUNNEL_DP);
+ KUNIT_EXPECT_PTR_EQ(test, tunnel->src_port, in);
+ KUNIT_EXPECT_PTR_EQ(test, tunnel->dst_port, out);
+ KUNIT_ASSERT_EQ(test, tunnel->npaths, (size_t)3);
+ KUNIT_ASSERT_EQ(test, tunnel->paths[0]->path_length, 4);
+ KUNIT_EXPECT_PTR_EQ(test, tunnel->paths[0]->hops[0].in_port, in);
+ KUNIT_EXPECT_PTR_EQ(test, tunnel->paths[0]->hops[3].out_port, out);
+ KUNIT_ASSERT_EQ(test, tunnel->paths[1]->path_length, 4);
+ KUNIT_EXPECT_PTR_EQ(test, tunnel->paths[1]->hops[0].in_port, in);
+ KUNIT_EXPECT_PTR_EQ(test, tunnel->paths[1]->hops[3].out_port, out);
+ KUNIT_ASSERT_EQ(test, tunnel->paths[2]->path_length, 4);
+ KUNIT_EXPECT_PTR_EQ(test, tunnel->paths[2]->hops[0].in_port, out);
+ KUNIT_EXPECT_PTR_EQ(test, tunnel->paths[2]->hops[3].out_port, in);
+ tb_tunnel_free(tunnel);
+}
+
+static void tb_test_tunnel_dp_max_length(struct kunit *test)
+{
+ struct tb_switch *host, *dev1, *dev2, *dev3, *dev4, *dev5, *dev6;
+ struct tb_switch *dev7, *dev8, *dev9, *dev10, *dev11, *dev12;
+ struct tb_port *in, *out;
+ struct tb_tunnel *tunnel;
+
+ /*
+ * Creates DP tunnel from Device #6 to Device #12.
+ *
+ * [Host]
+ * 1 / \ 3
+ * 1 / \ 1
+ * [Device #1] [Device #7]
+ * 3 | | 3
+ * 1 | | 1
+ * [Device #2] [Device #8]
+ * 3 | | 3
+ * 1 | | 1
+ * [Device #3] [Device #9]
+ * 3 | | 3
+ * 1 | | 1
+ * [Device #4] [Device #10]
+ * 3 | | 3
+ * 1 | | 1
+ * [Device #5] [Device #11]
+ * 3 | | 3
+ * 1 | | 1
+ * [Device #6] [Device #12]
+ */
+ host = alloc_host(test);
+ dev1 = alloc_dev_default(test, host, 0x1, true);
+ dev2 = alloc_dev_default(test, dev1, 0x301, true);
+ dev3 = alloc_dev_default(test, dev2, 0x30301, true);
+ dev4 = alloc_dev_default(test, dev3, 0x3030301, true);
+ dev5 = alloc_dev_default(test, dev4, 0x303030301, true);
+ dev6 = alloc_dev_with_dpin(test, dev5, 0x30303030301, true);
+ dev7 = alloc_dev_default(test, host, 0x3, true);
+ dev8 = alloc_dev_default(test, dev7, 0x303, true);
+ dev9 = alloc_dev_default(test, dev8, 0x30303, true);
+ dev10 = alloc_dev_default(test, dev9, 0x3030303, true);
+ dev11 = alloc_dev_default(test, dev10, 0x303030303, true);
+ dev12 = alloc_dev_default(test, dev11, 0x30303030303, true);
+
+ in = &dev6->ports[13];
+ out = &dev12->ports[13];
+
+ tunnel = tb_tunnel_alloc_dp(NULL, in, out, 0, 0);
+ KUNIT_ASSERT_TRUE(test, tunnel != NULL);
+ KUNIT_EXPECT_EQ(test, tunnel->type, (enum tb_tunnel_type)TB_TUNNEL_DP);
+ KUNIT_EXPECT_PTR_EQ(test, tunnel->src_port, in);
+ KUNIT_EXPECT_PTR_EQ(test, tunnel->dst_port, out);
+ KUNIT_ASSERT_EQ(test, tunnel->npaths, (size_t)3);
+ KUNIT_ASSERT_EQ(test, tunnel->paths[0]->path_length, 13);
+ /* First hop */
+ KUNIT_EXPECT_PTR_EQ(test, tunnel->paths[0]->hops[0].in_port, in);
+ /* Middle */
+ KUNIT_EXPECT_PTR_EQ(test, tunnel->paths[0]->hops[6].in_port,
+ &host->ports[1]);
+ KUNIT_EXPECT_PTR_EQ(test, tunnel->paths[0]->hops[6].out_port,
+ &host->ports[3]);
+ /* Last */
+ KUNIT_EXPECT_PTR_EQ(test, tunnel->paths[0]->hops[12].out_port, out);
+ KUNIT_ASSERT_EQ(test, tunnel->paths[1]->path_length, 13);
+ KUNIT_EXPECT_PTR_EQ(test, tunnel->paths[1]->hops[0].in_port, in);
+ KUNIT_EXPECT_PTR_EQ(test, tunnel->paths[1]->hops[6].in_port,
+ &host->ports[1]);
+ KUNIT_EXPECT_PTR_EQ(test, tunnel->paths[1]->hops[6].out_port,
+ &host->ports[3]);
+ KUNIT_EXPECT_PTR_EQ(test, tunnel->paths[1]->hops[12].out_port, out);
+ KUNIT_ASSERT_EQ(test, tunnel->paths[2]->path_length, 13);
+ KUNIT_EXPECT_PTR_EQ(test, tunnel->paths[2]->hops[0].in_port, out);
+ KUNIT_EXPECT_PTR_EQ(test, tunnel->paths[2]->hops[6].in_port,
+ &host->ports[3]);
+ KUNIT_EXPECT_PTR_EQ(test, tunnel->paths[2]->hops[6].out_port,
+ &host->ports[1]);
+ KUNIT_EXPECT_PTR_EQ(test, tunnel->paths[2]->hops[12].out_port, in);
+ tb_tunnel_free(tunnel);
+}
+
+static void tb_test_tunnel_usb3(struct kunit *test)
+{
+ struct tb_switch *host, *dev1, *dev2;
+ struct tb_tunnel *tunnel1, *tunnel2;
+ struct tb_port *down, *up;
+
+ /*
+ * Create USB3 tunnel between host and two devices.
+ *
+ * [Host]
+ * 1 |
+ * 1 |
+ * [Device #1]
+ * \ 7
+ * \ 1
+ * [Device #2]
+ */
+ host = alloc_host(test);
+ dev1 = alloc_dev_default(test, host, 0x1, true);
+ dev2 = alloc_dev_default(test, dev1, 0x701, true);
+
+ down = &host->ports[12];
+ up = &dev1->ports[16];
+ tunnel1 = tb_tunnel_alloc_usb3(NULL, up, down, 0, 0);
+ KUNIT_ASSERT_TRUE(test, tunnel1 != NULL);
+ KUNIT_EXPECT_EQ(test, tunnel1->type, (enum tb_tunnel_type)TB_TUNNEL_USB3);
+ KUNIT_EXPECT_PTR_EQ(test, tunnel1->src_port, down);
+ KUNIT_EXPECT_PTR_EQ(test, tunnel1->dst_port, up);
+ KUNIT_ASSERT_EQ(test, tunnel1->npaths, (size_t)2);
+ KUNIT_ASSERT_EQ(test, tunnel1->paths[0]->path_length, 2);
+ KUNIT_EXPECT_PTR_EQ(test, tunnel1->paths[0]->hops[0].in_port, down);
+ KUNIT_EXPECT_PTR_EQ(test, tunnel1->paths[0]->hops[1].out_port, up);
+ KUNIT_ASSERT_EQ(test, tunnel1->paths[1]->path_length, 2);
+ KUNIT_EXPECT_PTR_EQ(test, tunnel1->paths[1]->hops[0].in_port, up);
+ KUNIT_EXPECT_PTR_EQ(test, tunnel1->paths[1]->hops[1].out_port, down);
+
+ down = &dev1->ports[17];
+ up = &dev2->ports[16];
+ tunnel2 = tb_tunnel_alloc_usb3(NULL, up, down, 0, 0);
+ KUNIT_ASSERT_TRUE(test, tunnel2 != NULL);
+ KUNIT_EXPECT_EQ(test, tunnel2->type, (enum tb_tunnel_type)TB_TUNNEL_USB3);
+ KUNIT_EXPECT_PTR_EQ(test, tunnel2->src_port, down);
+ KUNIT_EXPECT_PTR_EQ(test, tunnel2->dst_port, up);
+ KUNIT_ASSERT_EQ(test, tunnel2->npaths, (size_t)2);
+ KUNIT_ASSERT_EQ(test, tunnel2->paths[0]->path_length, 2);
+ KUNIT_EXPECT_PTR_EQ(test, tunnel2->paths[0]->hops[0].in_port, down);
+ KUNIT_EXPECT_PTR_EQ(test, tunnel2->paths[0]->hops[1].out_port, up);
+ KUNIT_ASSERT_EQ(test, tunnel2->paths[1]->path_length, 2);
+ KUNIT_EXPECT_PTR_EQ(test, tunnel2->paths[1]->hops[0].in_port, up);
+ KUNIT_EXPECT_PTR_EQ(test, tunnel2->paths[1]->hops[1].out_port, down);
+
+ tb_tunnel_free(tunnel2);
+ tb_tunnel_free(tunnel1);
+}
+
+static void tb_test_tunnel_port_on_path(struct kunit *test)
+{
+ struct tb_switch *host, *dev1, *dev2, *dev3, *dev4, *dev5;
+ struct tb_port *in, *out, *port;
+ struct tb_tunnel *dp_tunnel;
+
+ /*
+ * [Host]
+ * 3 |
+ * 1 |
+ * [Device #1]
+ * 3 / | 5 \ 7
+ * 1 / | \ 1
+ * [Device #2] | [Device #4]
+ * | 1
+ * [Device #3]
+ * | 5
+ * | 1
+ * [Device #5]
+ */
+ host = alloc_host(test);
+ dev1 = alloc_dev_default(test, host, 0x3, true);
+ dev2 = alloc_dev_with_dpin(test, dev1, 0x303, true);
+ dev3 = alloc_dev_default(test, dev1, 0x503, true);
+ dev4 = alloc_dev_default(test, dev1, 0x703, true);
+ dev5 = alloc_dev_default(test, dev3, 0x50503, true);
+
+ in = &dev2->ports[13];
+ out = &dev5->ports[13];
+
+ dp_tunnel = tb_tunnel_alloc_dp(NULL, in, out, 0, 0);
+ KUNIT_ASSERT_TRUE(test, dp_tunnel != NULL);
+
+ KUNIT_EXPECT_TRUE(test, tb_tunnel_port_on_path(dp_tunnel, in));
+ KUNIT_EXPECT_TRUE(test, tb_tunnel_port_on_path(dp_tunnel, out));
+
+ port = &host->ports[8];
+ KUNIT_EXPECT_FALSE(test, tb_tunnel_port_on_path(dp_tunnel, port));
+
+ port = &host->ports[3];
+ KUNIT_EXPECT_FALSE(test, tb_tunnel_port_on_path(dp_tunnel, port));
+
+ port = &dev1->ports[1];
+ KUNIT_EXPECT_FALSE(test, tb_tunnel_port_on_path(dp_tunnel, port));
+
+ port = &dev1->ports[3];
+ KUNIT_EXPECT_TRUE(test, tb_tunnel_port_on_path(dp_tunnel, port));
+
+ port = &dev1->ports[5];
+ KUNIT_EXPECT_TRUE(test, tb_tunnel_port_on_path(dp_tunnel, port));
+
+ port = &dev1->ports[7];
+ KUNIT_EXPECT_FALSE(test, tb_tunnel_port_on_path(dp_tunnel, port));
+
+ port = &dev3->ports[1];
+ KUNIT_EXPECT_TRUE(test, tb_tunnel_port_on_path(dp_tunnel, port));
+
+ port = &dev5->ports[1];
+ KUNIT_EXPECT_TRUE(test, tb_tunnel_port_on_path(dp_tunnel, port));
+
+ port = &dev4->ports[1];
+ KUNIT_EXPECT_FALSE(test, tb_tunnel_port_on_path(dp_tunnel, port));
+
+ tb_tunnel_free(dp_tunnel);
+}
+
+static struct kunit_case tb_test_cases[] = {
+ KUNIT_CASE(tb_test_path_basic),
+ KUNIT_CASE(tb_test_path_not_connected_walk),
+ KUNIT_CASE(tb_test_path_single_hop_walk),
+ KUNIT_CASE(tb_test_path_daisy_chain_walk),
+ KUNIT_CASE(tb_test_path_simple_tree_walk),
+ KUNIT_CASE(tb_test_path_complex_tree_walk),
+ KUNIT_CASE(tb_test_path_max_length_walk),
+ KUNIT_CASE(tb_test_path_not_connected),
+ KUNIT_CASE(tb_test_path_not_bonded_lane0),
+ KUNIT_CASE(tb_test_path_not_bonded_lane1),
+ KUNIT_CASE(tb_test_path_not_bonded_lane1_chain),
+ KUNIT_CASE(tb_test_path_not_bonded_lane1_chain_reverse),
+ KUNIT_CASE(tb_test_path_mixed_chain),
+ KUNIT_CASE(tb_test_path_mixed_chain_reverse),
+ KUNIT_CASE(tb_test_tunnel_pcie),
+ KUNIT_CASE(tb_test_tunnel_dp),
+ KUNIT_CASE(tb_test_tunnel_dp_chain),
+ KUNIT_CASE(tb_test_tunnel_dp_tree),
+ KUNIT_CASE(tb_test_tunnel_dp_max_length),
+ KUNIT_CASE(tb_test_tunnel_port_on_path),
+ KUNIT_CASE(tb_test_tunnel_usb3),
+ { }
+};
+
+static struct kunit_suite tb_test_suite = {
+ .name = "thunderbolt",
+ .test_cases = tb_test_cases,
+};
+kunit_test_suite(tb_test_suite);
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.