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-rw-r--r--drivers/thunderbolt/test.c2820
1 files changed, 2820 insertions, 0 deletions
diff --git a/drivers/thunderbolt/test.c b/drivers/thunderbolt/test.c
new file mode 100644
index 000000000..24c06e735
--- /dev/null
+++ b/drivers/thunderbolt/test.c
@@ -0,0 +1,2820 @@
+// 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].total_credits = 60;
+ sw->ports[1].ctl_credits = 2;
+ 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].total_credits = 60;
+ sw->ports[2].ctl_credits = 2;
+ 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].total_credits = 60;
+ sw->ports[3].ctl_credits = 2;
+ 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].total_credits = 60;
+ sw->ports[4].ctl_credits = 2;
+ 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[7].config.nfc_credits = 0x41800000;
+
+ 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_host_usb4(struct kunit *test)
+{
+ struct tb_switch *sw;
+
+ sw = alloc_host(test);
+ if (!sw)
+ return NULL;
+
+ sw->generation = 4;
+ sw->credit_allocation = true;
+ sw->max_usb3_credits = 32;
+ sw->min_dp_aux_credits = 1;
+ sw->min_dp_main_credits = 0;
+ sw->max_pcie_credits = 64;
+ sw->max_dma_credits = 14;
+
+ 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].total_credits = 60;
+ sw->ports[1].ctl_credits = 2;
+ 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].total_credits = 60;
+ sw->ports[2].ctl_credits = 2;
+ 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].total_credits = 60;
+ sw->ports[3].ctl_credits = 2;
+ 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].total_credits = 60;
+ sw->ports[4].ctl_credits = 2;
+ 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].total_credits = 60;
+ sw->ports[5].ctl_credits = 2;
+ 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].total_credits = 60;
+ sw->ports[6].ctl_credits = 2;
+ 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].total_credits = 60;
+ sw->ports[7].ctl_credits = 2;
+ 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].total_credits = 60;
+ sw->ports[8].ctl_credits = 2;
+ 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->total_credits *= 2;
+ port->dual_link_port->bonded = true;
+ port->dual_link_port->total_credits = 0;
+ upstream_port->bonded = true;
+ upstream_port->total_credits *= 2;
+ upstream_port->dual_link_port->bonded = true;
+ upstream_port->dual_link_port->total_credits = 0;
+ }
+ }
+
+ 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 struct tb_switch *alloc_dev_without_dp(struct kunit *test,
+ struct tb_switch *parent,
+ u64 route, bool bonded)
+{
+ struct tb_switch *sw;
+ int i;
+
+ sw = alloc_dev_default(test, parent, route, bonded);
+ if (!sw)
+ return NULL;
+ /*
+ * Device with:
+ * 2x USB4 Adapters (adapters 1,2 and 3,4),
+ * 1x PCIe Upstream (adapter 9),
+ * 1x PCIe Downstream (adapter 10),
+ * 1x USB3 Upstream (adapter 16),
+ * 1x USB3 Downstream (adapter 17)
+ */
+ for (i = 5; i <= 8; i++)
+ sw->ports[i].disabled = true;
+
+ for (i = 11; i <= 14; i++)
+ sw->ports[i].disabled = true;
+
+ sw->ports[13].cap_adap = 0;
+ sw->ports[14].cap_adap = 0;
+
+ for (i = 18; i <= 19; i++)
+ sw->ports[i].disabled = true;
+
+ sw->generation = 4;
+ sw->credit_allocation = true;
+ sw->max_usb3_credits = 109;
+ sw->min_dp_aux_credits = 0;
+ sw->min_dp_main_credits = 0;
+ sw->max_pcie_credits = 30;
+ sw->max_dma_credits = 1;
+
+ return sw;
+}
+
+static struct tb_switch *alloc_dev_usb4(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->generation = 4;
+ sw->credit_allocation = true;
+ sw->max_usb3_credits = 14;
+ sw->min_dp_aux_credits = 1;
+ sw->min_dp_main_credits = 18;
+ sw->max_pcie_credits = 32;
+ sw->max_dma_credits = 14;
+
+ 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, 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, 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, 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, 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, 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_NULL(test, path);
+ path = tb_path_alloc(NULL, down, 8, up, 8, 1, "PCIe Down");
+ KUNIT_ASSERT_NULL(test, path);
+}
+
+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_NOT_NULL(test, path);
+ KUNIT_ASSERT_EQ(test, path->path_length, 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_NOT_NULL(test, path);
+ KUNIT_ASSERT_EQ(test, path->path_length, 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_NOT_NULL(test, path);
+ KUNIT_ASSERT_EQ(test, path->path_length, 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_NOT_NULL(test, path);
+ KUNIT_ASSERT_EQ(test, path->path_length, 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_NOT_NULL(test, path);
+ KUNIT_ASSERT_EQ(test, path->path_length, 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_NOT_NULL(test, path);
+ KUNIT_ASSERT_EQ(test, path->path_length, 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_NOT_NULL(test, tunnel1);
+ KUNIT_EXPECT_EQ(test, tunnel1->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, 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_NOT_NULL(test, tunnel2);
+ KUNIT_EXPECT_EQ(test, tunnel2->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, 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, 1, 0, 0);
+ KUNIT_ASSERT_NOT_NULL(test, tunnel);
+ KUNIT_EXPECT_EQ(test, 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, 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, 1, 0, 0);
+ KUNIT_ASSERT_NOT_NULL(test, tunnel);
+ KUNIT_EXPECT_EQ(test, 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, 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, 1, 0, 0);
+ KUNIT_ASSERT_NOT_NULL(test, tunnel);
+ KUNIT_EXPECT_EQ(test, 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, 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, 1, 0, 0);
+ KUNIT_ASSERT_NOT_NULL(test, tunnel);
+ KUNIT_EXPECT_EQ(test, 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, 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_NOT_NULL(test, tunnel1);
+ KUNIT_EXPECT_EQ(test, tunnel1->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, 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_NOT_NULL(test, tunnel2);
+ KUNIT_EXPECT_EQ(test, tunnel2->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, 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, 1, 0, 0);
+ KUNIT_ASSERT_NOT_NULL(test, dp_tunnel);
+
+ 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 void tb_test_tunnel_dma(struct kunit *test)
+{
+ struct tb_port *nhi, *port;
+ struct tb_tunnel *tunnel;
+ struct tb_switch *host;
+
+ /*
+ * Create DMA tunnel from NHI to port 1 and back.
+ *
+ * [Host 1]
+ * 1 ^ In HopID 1 -> Out HopID 8
+ * |
+ * v In HopID 8 -> Out HopID 1
+ * ............ Domain border
+ * |
+ * [Host 2]
+ */
+ host = alloc_host(test);
+ nhi = &host->ports[7];
+ port = &host->ports[1];
+
+ tunnel = tb_tunnel_alloc_dma(NULL, nhi, port, 8, 1, 8, 1);
+ KUNIT_ASSERT_NOT_NULL(test, tunnel);
+ KUNIT_EXPECT_EQ(test, tunnel->type, TB_TUNNEL_DMA);
+ KUNIT_EXPECT_PTR_EQ(test, tunnel->src_port, nhi);
+ KUNIT_EXPECT_PTR_EQ(test, tunnel->dst_port, port);
+ KUNIT_ASSERT_EQ(test, tunnel->npaths, 2);
+ /* RX path */
+ KUNIT_ASSERT_EQ(test, tunnel->paths[0]->path_length, 1);
+ KUNIT_EXPECT_PTR_EQ(test, tunnel->paths[0]->hops[0].in_port, port);
+ KUNIT_EXPECT_EQ(test, tunnel->paths[0]->hops[0].in_hop_index, 8);
+ KUNIT_EXPECT_PTR_EQ(test, tunnel->paths[0]->hops[0].out_port, nhi);
+ KUNIT_EXPECT_EQ(test, tunnel->paths[0]->hops[0].next_hop_index, 1);
+ /* TX path */
+ KUNIT_ASSERT_EQ(test, tunnel->paths[1]->path_length, 1);
+ KUNIT_EXPECT_PTR_EQ(test, tunnel->paths[1]->hops[0].in_port, nhi);
+ KUNIT_EXPECT_EQ(test, tunnel->paths[1]->hops[0].in_hop_index, 1);
+ KUNIT_EXPECT_PTR_EQ(test, tunnel->paths[1]->hops[0].out_port, port);
+ KUNIT_EXPECT_EQ(test, tunnel->paths[1]->hops[0].next_hop_index, 8);
+
+ tb_tunnel_free(tunnel);
+}
+
+static void tb_test_tunnel_dma_rx(struct kunit *test)
+{
+ struct tb_port *nhi, *port;
+ struct tb_tunnel *tunnel;
+ struct tb_switch *host;
+
+ /*
+ * Create DMA RX tunnel from port 1 to NHI.
+ *
+ * [Host 1]
+ * 1 ^
+ * |
+ * | In HopID 15 -> Out HopID 2
+ * ............ Domain border
+ * |
+ * [Host 2]
+ */
+ host = alloc_host(test);
+ nhi = &host->ports[7];
+ port = &host->ports[1];
+
+ tunnel = tb_tunnel_alloc_dma(NULL, nhi, port, -1, -1, 15, 2);
+ KUNIT_ASSERT_NOT_NULL(test, tunnel);
+ KUNIT_EXPECT_EQ(test, tunnel->type, TB_TUNNEL_DMA);
+ KUNIT_EXPECT_PTR_EQ(test, tunnel->src_port, nhi);
+ KUNIT_EXPECT_PTR_EQ(test, tunnel->dst_port, port);
+ KUNIT_ASSERT_EQ(test, tunnel->npaths, 1);
+ /* RX path */
+ KUNIT_ASSERT_EQ(test, tunnel->paths[0]->path_length, 1);
+ KUNIT_EXPECT_PTR_EQ(test, tunnel->paths[0]->hops[0].in_port, port);
+ KUNIT_EXPECT_EQ(test, tunnel->paths[0]->hops[0].in_hop_index, 15);
+ KUNIT_EXPECT_PTR_EQ(test, tunnel->paths[0]->hops[0].out_port, nhi);
+ KUNIT_EXPECT_EQ(test, tunnel->paths[0]->hops[0].next_hop_index, 2);
+
+ tb_tunnel_free(tunnel);
+}
+
+static void tb_test_tunnel_dma_tx(struct kunit *test)
+{
+ struct tb_port *nhi, *port;
+ struct tb_tunnel *tunnel;
+ struct tb_switch *host;
+
+ /*
+ * Create DMA TX tunnel from NHI to port 1.
+ *
+ * [Host 1]
+ * 1 | In HopID 2 -> Out HopID 15
+ * |
+ * v
+ * ............ Domain border
+ * |
+ * [Host 2]
+ */
+ host = alloc_host(test);
+ nhi = &host->ports[7];
+ port = &host->ports[1];
+
+ tunnel = tb_tunnel_alloc_dma(NULL, nhi, port, 15, 2, -1, -1);
+ KUNIT_ASSERT_NOT_NULL(test, tunnel);
+ KUNIT_EXPECT_EQ(test, tunnel->type, TB_TUNNEL_DMA);
+ KUNIT_EXPECT_PTR_EQ(test, tunnel->src_port, nhi);
+ KUNIT_EXPECT_PTR_EQ(test, tunnel->dst_port, port);
+ KUNIT_ASSERT_EQ(test, tunnel->npaths, 1);
+ /* TX path */
+ KUNIT_ASSERT_EQ(test, tunnel->paths[0]->path_length, 1);
+ KUNIT_EXPECT_PTR_EQ(test, tunnel->paths[0]->hops[0].in_port, nhi);
+ KUNIT_EXPECT_EQ(test, tunnel->paths[0]->hops[0].in_hop_index, 2);
+ KUNIT_EXPECT_PTR_EQ(test, tunnel->paths[0]->hops[0].out_port, port);
+ KUNIT_EXPECT_EQ(test, tunnel->paths[0]->hops[0].next_hop_index, 15);
+
+ tb_tunnel_free(tunnel);
+}
+
+static void tb_test_tunnel_dma_chain(struct kunit *test)
+{
+ struct tb_switch *host, *dev1, *dev2;
+ struct tb_port *nhi, *port;
+ struct tb_tunnel *tunnel;
+
+ /*
+ * Create DMA tunnel from NHI to Device #2 port 3 and back.
+ *
+ * [Host 1]
+ * 1 ^ In HopID 1 -> Out HopID x
+ * |
+ * 1 | In HopID x -> Out HopID 1
+ * [Device #1]
+ * 7 \
+ * 1 \
+ * [Device #2]
+ * 3 | In HopID x -> Out HopID 8
+ * |
+ * v In HopID 8 -> Out HopID x
+ * ............ Domain border
+ * |
+ * [Host 2]
+ */
+ host = alloc_host(test);
+ dev1 = alloc_dev_default(test, host, 0x1, true);
+ dev2 = alloc_dev_default(test, dev1, 0x701, true);
+
+ nhi = &host->ports[7];
+ port = &dev2->ports[3];
+ tunnel = tb_tunnel_alloc_dma(NULL, nhi, port, 8, 1, 8, 1);
+ KUNIT_ASSERT_NOT_NULL(test, tunnel);
+ KUNIT_EXPECT_EQ(test, tunnel->type, TB_TUNNEL_DMA);
+ KUNIT_EXPECT_PTR_EQ(test, tunnel->src_port, nhi);
+ KUNIT_EXPECT_PTR_EQ(test, tunnel->dst_port, port);
+ KUNIT_ASSERT_EQ(test, tunnel->npaths, 2);
+ /* RX path */
+ KUNIT_ASSERT_EQ(test, tunnel->paths[0]->path_length, 3);
+ KUNIT_EXPECT_PTR_EQ(test, tunnel->paths[0]->hops[0].in_port, port);
+ KUNIT_EXPECT_EQ(test, tunnel->paths[0]->hops[0].in_hop_index, 8);
+ KUNIT_EXPECT_PTR_EQ(test, tunnel->paths[0]->hops[0].out_port,
+ &dev2->ports[1]);
+ KUNIT_EXPECT_PTR_EQ(test, tunnel->paths[0]->hops[1].in_port,
+ &dev1->ports[7]);
+ KUNIT_EXPECT_PTR_EQ(test, tunnel->paths[0]->hops[1].out_port,
+ &dev1->ports[1]);
+ KUNIT_EXPECT_PTR_EQ(test, tunnel->paths[0]->hops[2].in_port,
+ &host->ports[1]);
+ KUNIT_EXPECT_PTR_EQ(test, tunnel->paths[0]->hops[2].out_port, nhi);
+ KUNIT_EXPECT_EQ(test, tunnel->paths[0]->hops[2].next_hop_index, 1);
+ /* TX path */
+ KUNIT_ASSERT_EQ(test, tunnel->paths[1]->path_length, 3);
+ KUNIT_EXPECT_PTR_EQ(test, tunnel->paths[1]->hops[0].in_port, nhi);
+ KUNIT_EXPECT_EQ(test, tunnel->paths[1]->hops[0].in_hop_index, 1);
+ KUNIT_EXPECT_PTR_EQ(test, tunnel->paths[1]->hops[1].in_port,
+ &dev1->ports[1]);
+ KUNIT_EXPECT_PTR_EQ(test, tunnel->paths[1]->hops[1].out_port,
+ &dev1->ports[7]);
+ KUNIT_EXPECT_PTR_EQ(test, tunnel->paths[1]->hops[2].in_port,
+ &dev2->ports[1]);
+ KUNIT_EXPECT_PTR_EQ(test, tunnel->paths[1]->hops[2].out_port, port);
+ KUNIT_EXPECT_EQ(test, tunnel->paths[1]->hops[2].next_hop_index, 8);
+
+ tb_tunnel_free(tunnel);
+}
+
+static void tb_test_tunnel_dma_match(struct kunit *test)
+{
+ struct tb_port *nhi, *port;
+ struct tb_tunnel *tunnel;
+ struct tb_switch *host;
+
+ host = alloc_host(test);
+ nhi = &host->ports[7];
+ port = &host->ports[1];
+
+ tunnel = tb_tunnel_alloc_dma(NULL, nhi, port, 15, 1, 15, 1);
+ KUNIT_ASSERT_NOT_NULL(test, tunnel);
+
+ KUNIT_ASSERT_TRUE(test, tb_tunnel_match_dma(tunnel, 15, 1, 15, 1));
+ KUNIT_ASSERT_FALSE(test, tb_tunnel_match_dma(tunnel, 8, 1, 15, 1));
+ KUNIT_ASSERT_TRUE(test, tb_tunnel_match_dma(tunnel, -1, -1, 15, 1));
+ KUNIT_ASSERT_TRUE(test, tb_tunnel_match_dma(tunnel, 15, 1, -1, -1));
+ KUNIT_ASSERT_TRUE(test, tb_tunnel_match_dma(tunnel, 15, -1, -1, -1));
+ KUNIT_ASSERT_TRUE(test, tb_tunnel_match_dma(tunnel, -1, 1, -1, -1));
+ KUNIT_ASSERT_TRUE(test, tb_tunnel_match_dma(tunnel, -1, -1, 15, -1));
+ KUNIT_ASSERT_TRUE(test, tb_tunnel_match_dma(tunnel, -1, -1, -1, 1));
+ KUNIT_ASSERT_TRUE(test, tb_tunnel_match_dma(tunnel, -1, -1, -1, -1));
+ KUNIT_ASSERT_FALSE(test, tb_tunnel_match_dma(tunnel, 8, -1, 8, -1));
+
+ tb_tunnel_free(tunnel);
+
+ tunnel = tb_tunnel_alloc_dma(NULL, nhi, port, 15, 1, -1, -1);
+ KUNIT_ASSERT_NOT_NULL(test, tunnel);
+ KUNIT_ASSERT_TRUE(test, tb_tunnel_match_dma(tunnel, 15, 1, -1, -1));
+ KUNIT_ASSERT_TRUE(test, tb_tunnel_match_dma(tunnel, 15, -1, -1, -1));
+ KUNIT_ASSERT_TRUE(test, tb_tunnel_match_dma(tunnel, -1, 1, -1, -1));
+ KUNIT_ASSERT_TRUE(test, tb_tunnel_match_dma(tunnel, -1, -1, -1, -1));
+ KUNIT_ASSERT_FALSE(test, tb_tunnel_match_dma(tunnel, 15, 1, 15, 1));
+ KUNIT_ASSERT_FALSE(test, tb_tunnel_match_dma(tunnel, -1, -1, 15, 1));
+ KUNIT_ASSERT_FALSE(test, tb_tunnel_match_dma(tunnel, 15, 11, -1, -1));
+
+ tb_tunnel_free(tunnel);
+
+ tunnel = tb_tunnel_alloc_dma(NULL, nhi, port, -1, -1, 15, 11);
+ KUNIT_ASSERT_NOT_NULL(test, tunnel);
+ KUNIT_ASSERT_TRUE(test, tb_tunnel_match_dma(tunnel, -1, -1, 15, 11));
+ KUNIT_ASSERT_TRUE(test, tb_tunnel_match_dma(tunnel, -1, -1, 15, -1));
+ KUNIT_ASSERT_TRUE(test, tb_tunnel_match_dma(tunnel, -1, -1, -1, 11));
+ KUNIT_ASSERT_TRUE(test, tb_tunnel_match_dma(tunnel, -1, -1, -1, -1));
+ KUNIT_ASSERT_FALSE(test, tb_tunnel_match_dma(tunnel, -1, -1, 15, 1));
+ KUNIT_ASSERT_FALSE(test, tb_tunnel_match_dma(tunnel, -1, -1, 10, 11));
+ KUNIT_ASSERT_FALSE(test, tb_tunnel_match_dma(tunnel, 15, 11, -1, -1));
+
+ tb_tunnel_free(tunnel);
+}
+
+static void tb_test_credit_alloc_legacy_not_bonded(struct kunit *test)
+{
+ struct tb_switch *host, *dev;
+ struct tb_port *up, *down;
+ struct tb_tunnel *tunnel;
+ struct tb_path *path;
+
+ host = alloc_host(test);
+ dev = alloc_dev_default(test, host, 0x1, false);
+
+ down = &host->ports[8];
+ up = &dev->ports[9];
+ tunnel = tb_tunnel_alloc_pci(NULL, up, down);
+ KUNIT_ASSERT_NOT_NULL(test, tunnel);
+ KUNIT_ASSERT_EQ(test, tunnel->npaths, (size_t)2);
+
+ path = tunnel->paths[0];
+ KUNIT_ASSERT_EQ(test, path->path_length, 2);
+ KUNIT_EXPECT_EQ(test, path->hops[0].nfc_credits, 0U);
+ KUNIT_EXPECT_EQ(test, path->hops[0].initial_credits, 7U);
+ KUNIT_EXPECT_EQ(test, path->hops[1].nfc_credits, 0U);
+ KUNIT_EXPECT_EQ(test, path->hops[1].initial_credits, 16U);
+
+ path = tunnel->paths[1];
+ KUNIT_ASSERT_EQ(test, path->path_length, 2);
+ KUNIT_EXPECT_EQ(test, path->hops[0].nfc_credits, 0U);
+ KUNIT_EXPECT_EQ(test, path->hops[0].initial_credits, 7U);
+ KUNIT_EXPECT_EQ(test, path->hops[1].nfc_credits, 0U);
+ KUNIT_EXPECT_EQ(test, path->hops[1].initial_credits, 16U);
+
+ tb_tunnel_free(tunnel);
+}
+
+static void tb_test_credit_alloc_legacy_bonded(struct kunit *test)
+{
+ struct tb_switch *host, *dev;
+ struct tb_port *up, *down;
+ struct tb_tunnel *tunnel;
+ struct tb_path *path;
+
+ host = alloc_host(test);
+ dev = alloc_dev_default(test, host, 0x1, true);
+
+ down = &host->ports[8];
+ up = &dev->ports[9];
+ tunnel = tb_tunnel_alloc_pci(NULL, up, down);
+ KUNIT_ASSERT_NOT_NULL(test, tunnel);
+ KUNIT_ASSERT_EQ(test, tunnel->npaths, (size_t)2);
+
+ path = tunnel->paths[0];
+ KUNIT_ASSERT_EQ(test, path->path_length, 2);
+ KUNIT_EXPECT_EQ(test, path->hops[0].nfc_credits, 0U);
+ KUNIT_EXPECT_EQ(test, path->hops[0].initial_credits, 7U);
+ KUNIT_EXPECT_EQ(test, path->hops[1].nfc_credits, 0U);
+ KUNIT_EXPECT_EQ(test, path->hops[1].initial_credits, 32U);
+
+ path = tunnel->paths[1];
+ KUNIT_ASSERT_EQ(test, path->path_length, 2);
+ KUNIT_EXPECT_EQ(test, path->hops[0].nfc_credits, 0U);
+ KUNIT_EXPECT_EQ(test, path->hops[0].initial_credits, 7U);
+ KUNIT_EXPECT_EQ(test, path->hops[1].nfc_credits, 0U);
+ KUNIT_EXPECT_EQ(test, path->hops[1].initial_credits, 32U);
+
+ tb_tunnel_free(tunnel);
+}
+
+static void tb_test_credit_alloc_pcie(struct kunit *test)
+{
+ struct tb_switch *host, *dev;
+ struct tb_port *up, *down;
+ struct tb_tunnel *tunnel;
+ struct tb_path *path;
+
+ host = alloc_host_usb4(test);
+ dev = alloc_dev_usb4(test, host, 0x1, true);
+
+ down = &host->ports[8];
+ up = &dev->ports[9];
+ tunnel = tb_tunnel_alloc_pci(NULL, up, down);
+ KUNIT_ASSERT_NOT_NULL(test, tunnel);
+ KUNIT_ASSERT_EQ(test, tunnel->npaths, (size_t)2);
+
+ path = tunnel->paths[0];
+ KUNIT_ASSERT_EQ(test, path->path_length, 2);
+ KUNIT_EXPECT_EQ(test, path->hops[0].nfc_credits, 0U);
+ KUNIT_EXPECT_EQ(test, path->hops[0].initial_credits, 7U);
+ KUNIT_EXPECT_EQ(test, path->hops[1].nfc_credits, 0U);
+ KUNIT_EXPECT_EQ(test, path->hops[1].initial_credits, 32U);
+
+ path = tunnel->paths[1];
+ KUNIT_ASSERT_EQ(test, path->path_length, 2);
+ KUNIT_EXPECT_EQ(test, path->hops[0].nfc_credits, 0U);
+ KUNIT_EXPECT_EQ(test, path->hops[0].initial_credits, 7U);
+ KUNIT_EXPECT_EQ(test, path->hops[1].nfc_credits, 0U);
+ KUNIT_EXPECT_EQ(test, path->hops[1].initial_credits, 64U);
+
+ tb_tunnel_free(tunnel);
+}
+
+static void tb_test_credit_alloc_without_dp(struct kunit *test)
+{
+ struct tb_switch *host, *dev;
+ struct tb_port *up, *down;
+ struct tb_tunnel *tunnel;
+ struct tb_path *path;
+
+ host = alloc_host_usb4(test);
+ dev = alloc_dev_without_dp(test, host, 0x1, true);
+
+ /*
+ * The device has no DP therefore baMinDPmain = baMinDPaux = 0
+ *
+ * Create PCIe path with buffers less than baMaxPCIe.
+ *
+ * For a device with buffers configurations:
+ * baMaxUSB3 = 109
+ * baMinDPaux = 0
+ * baMinDPmain = 0
+ * baMaxPCIe = 30
+ * baMaxHI = 1
+ * Remaining Buffers = Total - (CP + DP) = 120 - (2 + 0) = 118
+ * PCIe Credits = Max(6, Min(baMaxPCIe, Remaining Buffers - baMaxUSB3)
+ * = Max(6, Min(30, 9) = 9
+ */
+ down = &host->ports[8];
+ up = &dev->ports[9];
+ tunnel = tb_tunnel_alloc_pci(NULL, up, down);
+ KUNIT_ASSERT_TRUE(test, tunnel != NULL);
+ KUNIT_ASSERT_EQ(test, tunnel->npaths, (size_t)2);
+
+ /* PCIe downstream path */
+ path = tunnel->paths[0];
+ KUNIT_ASSERT_EQ(test, path->path_length, 2);
+ KUNIT_EXPECT_EQ(test, path->hops[0].nfc_credits, 0U);
+ KUNIT_EXPECT_EQ(test, path->hops[0].initial_credits, 7U);
+ KUNIT_EXPECT_EQ(test, path->hops[1].nfc_credits, 0U);
+ KUNIT_EXPECT_EQ(test, path->hops[1].initial_credits, 9U);
+
+ /* PCIe upstream path */
+ path = tunnel->paths[1];
+ KUNIT_ASSERT_EQ(test, path->path_length, 2);
+ KUNIT_EXPECT_EQ(test, path->hops[0].nfc_credits, 0U);
+ KUNIT_EXPECT_EQ(test, path->hops[0].initial_credits, 7U);
+ KUNIT_EXPECT_EQ(test, path->hops[1].nfc_credits, 0U);
+ KUNIT_EXPECT_EQ(test, path->hops[1].initial_credits, 64U);
+
+ tb_tunnel_free(tunnel);
+}
+
+static void tb_test_credit_alloc_dp(struct kunit *test)
+{
+ struct tb_switch *host, *dev;
+ struct tb_port *in, *out;
+ struct tb_tunnel *tunnel;
+ struct tb_path *path;
+
+ host = alloc_host_usb4(test);
+ dev = alloc_dev_usb4(test, host, 0x1, true);
+
+ in = &host->ports[5];
+ out = &dev->ports[14];
+
+ tunnel = tb_tunnel_alloc_dp(NULL, in, out, 1, 0, 0);
+ KUNIT_ASSERT_NOT_NULL(test, tunnel);
+ KUNIT_ASSERT_EQ(test, tunnel->npaths, (size_t)3);
+
+ /* Video (main) path */
+ path = tunnel->paths[0];
+ KUNIT_ASSERT_EQ(test, path->path_length, 2);
+ KUNIT_EXPECT_EQ(test, path->hops[0].nfc_credits, 12U);
+ KUNIT_EXPECT_EQ(test, path->hops[0].initial_credits, 0U);
+ KUNIT_EXPECT_EQ(test, path->hops[1].nfc_credits, 18U);
+ KUNIT_EXPECT_EQ(test, path->hops[1].initial_credits, 0U);
+
+ /* AUX TX */
+ path = tunnel->paths[1];
+ KUNIT_ASSERT_EQ(test, path->path_length, 2);
+ KUNIT_EXPECT_EQ(test, path->hops[0].nfc_credits, 0U);
+ KUNIT_EXPECT_EQ(test, path->hops[0].initial_credits, 1U);
+ KUNIT_EXPECT_EQ(test, path->hops[1].nfc_credits, 0U);
+ KUNIT_EXPECT_EQ(test, path->hops[1].initial_credits, 1U);
+
+ /* AUX RX */
+ path = tunnel->paths[2];
+ KUNIT_ASSERT_EQ(test, path->path_length, 2);
+ KUNIT_EXPECT_EQ(test, path->hops[0].nfc_credits, 0U);
+ KUNIT_EXPECT_EQ(test, path->hops[0].initial_credits, 1U);
+ KUNIT_EXPECT_EQ(test, path->hops[1].nfc_credits, 0U);
+ KUNIT_EXPECT_EQ(test, path->hops[1].initial_credits, 1U);
+
+ tb_tunnel_free(tunnel);
+}
+
+static void tb_test_credit_alloc_usb3(struct kunit *test)
+{
+ struct tb_switch *host, *dev;
+ struct tb_port *up, *down;
+ struct tb_tunnel *tunnel;
+ struct tb_path *path;
+
+ host = alloc_host_usb4(test);
+ dev = alloc_dev_usb4(test, host, 0x1, true);
+
+ down = &host->ports[12];
+ up = &dev->ports[16];
+ tunnel = tb_tunnel_alloc_usb3(NULL, up, down, 0, 0);
+ KUNIT_ASSERT_NOT_NULL(test, tunnel);
+ KUNIT_ASSERT_EQ(test, tunnel->npaths, (size_t)2);
+
+ path = tunnel->paths[0];
+ KUNIT_ASSERT_EQ(test, path->path_length, 2);
+ KUNIT_EXPECT_EQ(test, path->hops[0].nfc_credits, 0U);
+ KUNIT_EXPECT_EQ(test, path->hops[0].initial_credits, 7U);
+ KUNIT_EXPECT_EQ(test, path->hops[1].nfc_credits, 0U);
+ KUNIT_EXPECT_EQ(test, path->hops[1].initial_credits, 14U);
+
+ path = tunnel->paths[1];
+ KUNIT_ASSERT_EQ(test, path->path_length, 2);
+ KUNIT_EXPECT_EQ(test, path->hops[0].nfc_credits, 0U);
+ KUNIT_EXPECT_EQ(test, path->hops[0].initial_credits, 7U);
+ KUNIT_EXPECT_EQ(test, path->hops[1].nfc_credits, 0U);
+ KUNIT_EXPECT_EQ(test, path->hops[1].initial_credits, 32U);
+
+ tb_tunnel_free(tunnel);
+}
+
+static void tb_test_credit_alloc_dma(struct kunit *test)
+{
+ struct tb_switch *host, *dev;
+ struct tb_port *nhi, *port;
+ struct tb_tunnel *tunnel;
+ struct tb_path *path;
+
+ host = alloc_host_usb4(test);
+ dev = alloc_dev_usb4(test, host, 0x1, true);
+
+ nhi = &host->ports[7];
+ port = &dev->ports[3];
+
+ tunnel = tb_tunnel_alloc_dma(NULL, nhi, port, 8, 1, 8, 1);
+ KUNIT_ASSERT_NOT_NULL(test, tunnel);
+ KUNIT_ASSERT_EQ(test, tunnel->npaths, (size_t)2);
+
+ /* DMA RX */
+ path = tunnel->paths[0];
+ KUNIT_ASSERT_EQ(test, path->path_length, 2);
+ KUNIT_EXPECT_EQ(test, path->hops[0].nfc_credits, 0U);
+ KUNIT_EXPECT_EQ(test, path->hops[0].initial_credits, 14U);
+ KUNIT_EXPECT_EQ(test, path->hops[1].nfc_credits, 0U);
+ KUNIT_EXPECT_EQ(test, path->hops[1].initial_credits, 14U);
+
+ /* DMA TX */
+ path = tunnel->paths[1];
+ KUNIT_ASSERT_EQ(test, path->path_length, 2);
+ KUNIT_EXPECT_EQ(test, path->hops[0].nfc_credits, 0U);
+ KUNIT_EXPECT_EQ(test, path->hops[0].initial_credits, 0U);
+ KUNIT_EXPECT_EQ(test, path->hops[1].nfc_credits, 0U);
+ KUNIT_EXPECT_EQ(test, path->hops[1].initial_credits, 14U);
+
+ tb_tunnel_free(tunnel);
+}
+
+static void tb_test_credit_alloc_dma_multiple(struct kunit *test)
+{
+ struct tb_tunnel *tunnel1, *tunnel2, *tunnel3;
+ struct tb_switch *host, *dev;
+ struct tb_port *nhi, *port;
+ struct tb_path *path;
+
+ host = alloc_host_usb4(test);
+ dev = alloc_dev_usb4(test, host, 0x1, true);
+
+ nhi = &host->ports[7];
+ port = &dev->ports[3];
+
+ /*
+ * Create three DMA tunnels through the same ports. With the
+ * default buffers we should be able to create two and the last
+ * one fails.
+ *
+ * For default host we have following buffers for DMA:
+ *
+ * 120 - (2 + 2 * (1 + 0) + 32 + 64 + spare) = 20
+ *
+ * For device we have following:
+ *
+ * 120 - (2 + 2 * (1 + 18) + 14 + 32 + spare) = 34
+ *
+ * spare = 14 + 1 = 15
+ *
+ * So on host the first tunnel gets 14 and the second gets the
+ * remaining 1 and then we run out of buffers.
+ */
+ tunnel1 = tb_tunnel_alloc_dma(NULL, nhi, port, 8, 1, 8, 1);
+ KUNIT_ASSERT_NOT_NULL(test, tunnel1);
+ KUNIT_ASSERT_EQ(test, tunnel1->npaths, (size_t)2);
+
+ path = tunnel1->paths[0];
+ KUNIT_ASSERT_EQ(test, path->path_length, 2);
+ KUNIT_EXPECT_EQ(test, path->hops[0].nfc_credits, 0U);
+ KUNIT_EXPECT_EQ(test, path->hops[0].initial_credits, 14U);
+ KUNIT_EXPECT_EQ(test, path->hops[1].nfc_credits, 0U);
+ KUNIT_EXPECT_EQ(test, path->hops[1].initial_credits, 14U);
+
+ path = tunnel1->paths[1];
+ KUNIT_ASSERT_EQ(test, path->path_length, 2);
+ KUNIT_EXPECT_EQ(test, path->hops[0].nfc_credits, 0U);
+ KUNIT_EXPECT_EQ(test, path->hops[0].initial_credits, 0U);
+ KUNIT_EXPECT_EQ(test, path->hops[1].nfc_credits, 0U);
+ KUNIT_EXPECT_EQ(test, path->hops[1].initial_credits, 14U);
+
+ tunnel2 = tb_tunnel_alloc_dma(NULL, nhi, port, 9, 2, 9, 2);
+ KUNIT_ASSERT_NOT_NULL(test, tunnel2);
+ KUNIT_ASSERT_EQ(test, tunnel2->npaths, (size_t)2);
+
+ path = tunnel2->paths[0];
+ KUNIT_ASSERT_EQ(test, path->path_length, 2);
+ KUNIT_EXPECT_EQ(test, path->hops[0].nfc_credits, 0U);
+ KUNIT_EXPECT_EQ(test, path->hops[0].initial_credits, 14U);
+ KUNIT_EXPECT_EQ(test, path->hops[1].nfc_credits, 0U);
+ KUNIT_EXPECT_EQ(test, path->hops[1].initial_credits, 1U);
+
+ path = tunnel2->paths[1];
+ KUNIT_ASSERT_EQ(test, path->path_length, 2);
+ KUNIT_EXPECT_EQ(test, path->hops[0].nfc_credits, 0U);
+ KUNIT_EXPECT_EQ(test, path->hops[0].initial_credits, 0U);
+ KUNIT_EXPECT_EQ(test, path->hops[1].nfc_credits, 0U);
+ KUNIT_EXPECT_EQ(test, path->hops[1].initial_credits, 1U);
+
+ tunnel3 = tb_tunnel_alloc_dma(NULL, nhi, port, 10, 3, 10, 3);
+ KUNIT_ASSERT_NULL(test, tunnel3);
+
+ /*
+ * Release the first DMA tunnel. That should make 14 buffers
+ * available for the next tunnel.
+ */
+ tb_tunnel_free(tunnel1);
+
+ tunnel3 = tb_tunnel_alloc_dma(NULL, nhi, port, 10, 3, 10, 3);
+ KUNIT_ASSERT_NOT_NULL(test, tunnel3);
+
+ path = tunnel3->paths[0];
+ KUNIT_ASSERT_EQ(test, path->path_length, 2);
+ KUNIT_EXPECT_EQ(test, path->hops[0].nfc_credits, 0U);
+ KUNIT_EXPECT_EQ(test, path->hops[0].initial_credits, 14U);
+ KUNIT_EXPECT_EQ(test, path->hops[1].nfc_credits, 0U);
+ KUNIT_EXPECT_EQ(test, path->hops[1].initial_credits, 14U);
+
+ path = tunnel3->paths[1];
+ KUNIT_ASSERT_EQ(test, path->path_length, 2);
+ KUNIT_EXPECT_EQ(test, path->hops[0].nfc_credits, 0U);
+ KUNIT_EXPECT_EQ(test, path->hops[0].initial_credits, 0U);
+ KUNIT_EXPECT_EQ(test, path->hops[1].nfc_credits, 0U);
+ KUNIT_EXPECT_EQ(test, path->hops[1].initial_credits, 14U);
+
+ tb_tunnel_free(tunnel3);
+ tb_tunnel_free(tunnel2);
+}
+
+static struct tb_tunnel *TB_TEST_PCIE_TUNNEL(struct kunit *test,
+ struct tb_switch *host, struct tb_switch *dev)
+{
+ struct tb_port *up, *down;
+ struct tb_tunnel *pcie_tunnel;
+ struct tb_path *path;
+
+ down = &host->ports[8];
+ up = &dev->ports[9];
+ pcie_tunnel = tb_tunnel_alloc_pci(NULL, up, down);
+ KUNIT_ASSERT_NOT_NULL(test, pcie_tunnel);
+ KUNIT_ASSERT_EQ(test, pcie_tunnel->npaths, (size_t)2);
+
+ path = pcie_tunnel->paths[0];
+ KUNIT_ASSERT_EQ(test, path->path_length, 2);
+ KUNIT_EXPECT_EQ(test, path->hops[0].nfc_credits, 0U);
+ KUNIT_EXPECT_EQ(test, path->hops[0].initial_credits, 7U);
+ KUNIT_EXPECT_EQ(test, path->hops[1].nfc_credits, 0U);
+ KUNIT_EXPECT_EQ(test, path->hops[1].initial_credits, 32U);
+
+ path = pcie_tunnel->paths[1];
+ KUNIT_ASSERT_EQ(test, path->path_length, 2);
+ KUNIT_EXPECT_EQ(test, path->hops[0].nfc_credits, 0U);
+ KUNIT_EXPECT_EQ(test, path->hops[0].initial_credits, 7U);
+ KUNIT_EXPECT_EQ(test, path->hops[1].nfc_credits, 0U);
+ KUNIT_EXPECT_EQ(test, path->hops[1].initial_credits, 64U);
+
+ return pcie_tunnel;
+}
+
+static struct tb_tunnel *TB_TEST_DP_TUNNEL1(struct kunit *test,
+ struct tb_switch *host, struct tb_switch *dev)
+{
+ struct tb_port *in, *out;
+ struct tb_tunnel *dp_tunnel1;
+ struct tb_path *path;
+
+ in = &host->ports[5];
+ out = &dev->ports[13];
+ dp_tunnel1 = tb_tunnel_alloc_dp(NULL, in, out, 1, 0, 0);
+ KUNIT_ASSERT_NOT_NULL(test, dp_tunnel1);
+ KUNIT_ASSERT_EQ(test, dp_tunnel1->npaths, (size_t)3);
+
+ path = dp_tunnel1->paths[0];
+ KUNIT_ASSERT_EQ(test, path->path_length, 2);
+ KUNIT_EXPECT_EQ(test, path->hops[0].nfc_credits, 12U);
+ KUNIT_EXPECT_EQ(test, path->hops[0].initial_credits, 0U);
+ KUNIT_EXPECT_EQ(test, path->hops[1].nfc_credits, 18U);
+ KUNIT_EXPECT_EQ(test, path->hops[1].initial_credits, 0U);
+
+ path = dp_tunnel1->paths[1];
+ KUNIT_ASSERT_EQ(test, path->path_length, 2);
+ KUNIT_EXPECT_EQ(test, path->hops[0].nfc_credits, 0U);
+ KUNIT_EXPECT_EQ(test, path->hops[0].initial_credits, 1U);
+ KUNIT_EXPECT_EQ(test, path->hops[1].nfc_credits, 0U);
+ KUNIT_EXPECT_EQ(test, path->hops[1].initial_credits, 1U);
+
+ path = dp_tunnel1->paths[2];
+ KUNIT_ASSERT_EQ(test, path->path_length, 2);
+ KUNIT_EXPECT_EQ(test, path->hops[0].nfc_credits, 0U);
+ KUNIT_EXPECT_EQ(test, path->hops[0].initial_credits, 1U);
+ KUNIT_EXPECT_EQ(test, path->hops[1].nfc_credits, 0U);
+ KUNIT_EXPECT_EQ(test, path->hops[1].initial_credits, 1U);
+
+ return dp_tunnel1;
+}
+
+static struct tb_tunnel *TB_TEST_DP_TUNNEL2(struct kunit *test,
+ struct tb_switch *host, struct tb_switch *dev)
+{
+ struct tb_port *in, *out;
+ struct tb_tunnel *dp_tunnel2;
+ struct tb_path *path;
+
+ in = &host->ports[6];
+ out = &dev->ports[14];
+ dp_tunnel2 = tb_tunnel_alloc_dp(NULL, in, out, 1, 0, 0);
+ KUNIT_ASSERT_NOT_NULL(test, dp_tunnel2);
+ KUNIT_ASSERT_EQ(test, dp_tunnel2->npaths, (size_t)3);
+
+ path = dp_tunnel2->paths[0];
+ KUNIT_ASSERT_EQ(test, path->path_length, 2);
+ KUNIT_EXPECT_EQ(test, path->hops[0].nfc_credits, 12U);
+ KUNIT_EXPECT_EQ(test, path->hops[0].initial_credits, 0U);
+ KUNIT_EXPECT_EQ(test, path->hops[1].nfc_credits, 18U);
+ KUNIT_EXPECT_EQ(test, path->hops[1].initial_credits, 0U);
+
+ path = dp_tunnel2->paths[1];
+ KUNIT_ASSERT_EQ(test, path->path_length, 2);
+ KUNIT_EXPECT_EQ(test, path->hops[0].nfc_credits, 0U);
+ KUNIT_EXPECT_EQ(test, path->hops[0].initial_credits, 1U);
+ KUNIT_EXPECT_EQ(test, path->hops[1].nfc_credits, 0U);
+ KUNIT_EXPECT_EQ(test, path->hops[1].initial_credits, 1U);
+
+ path = dp_tunnel2->paths[2];
+ KUNIT_ASSERT_EQ(test, path->path_length, 2);
+ KUNIT_EXPECT_EQ(test, path->hops[0].nfc_credits, 0U);
+ KUNIT_EXPECT_EQ(test, path->hops[0].initial_credits, 1U);
+ KUNIT_EXPECT_EQ(test, path->hops[1].nfc_credits, 0U);
+ KUNIT_EXPECT_EQ(test, path->hops[1].initial_credits, 1U);
+
+ return dp_tunnel2;
+}
+
+static struct tb_tunnel *TB_TEST_USB3_TUNNEL(struct kunit *test,
+ struct tb_switch *host, struct tb_switch *dev)
+{
+ struct tb_port *up, *down;
+ struct tb_tunnel *usb3_tunnel;
+ struct tb_path *path;
+
+ down = &host->ports[12];
+ up = &dev->ports[16];
+ usb3_tunnel = tb_tunnel_alloc_usb3(NULL, up, down, 0, 0);
+ KUNIT_ASSERT_NOT_NULL(test, usb3_tunnel);
+ KUNIT_ASSERT_EQ(test, usb3_tunnel->npaths, (size_t)2);
+
+ path = usb3_tunnel->paths[0];
+ KUNIT_ASSERT_EQ(test, path->path_length, 2);
+ KUNIT_EXPECT_EQ(test, path->hops[0].nfc_credits, 0U);
+ KUNIT_EXPECT_EQ(test, path->hops[0].initial_credits, 7U);
+ KUNIT_EXPECT_EQ(test, path->hops[1].nfc_credits, 0U);
+ KUNIT_EXPECT_EQ(test, path->hops[1].initial_credits, 14U);
+
+ path = usb3_tunnel->paths[1];
+ KUNIT_ASSERT_EQ(test, path->path_length, 2);
+ KUNIT_EXPECT_EQ(test, path->hops[0].nfc_credits, 0U);
+ KUNIT_EXPECT_EQ(test, path->hops[0].initial_credits, 7U);
+ KUNIT_EXPECT_EQ(test, path->hops[1].nfc_credits, 0U);
+ KUNIT_EXPECT_EQ(test, path->hops[1].initial_credits, 32U);
+
+ return usb3_tunnel;
+}
+
+static struct tb_tunnel *TB_TEST_DMA_TUNNEL1(struct kunit *test,
+ struct tb_switch *host, struct tb_switch *dev)
+{
+ struct tb_port *nhi, *port;
+ struct tb_tunnel *dma_tunnel1;
+ struct tb_path *path;
+
+ nhi = &host->ports[7];
+ port = &dev->ports[3];
+ dma_tunnel1 = tb_tunnel_alloc_dma(NULL, nhi, port, 8, 1, 8, 1);
+ KUNIT_ASSERT_NOT_NULL(test, dma_tunnel1);
+ KUNIT_ASSERT_EQ(test, dma_tunnel1->npaths, (size_t)2);
+
+ path = dma_tunnel1->paths[0];
+ KUNIT_ASSERT_EQ(test, path->path_length, 2);
+ KUNIT_EXPECT_EQ(test, path->hops[0].nfc_credits, 0U);
+ KUNIT_EXPECT_EQ(test, path->hops[0].initial_credits, 14U);
+ KUNIT_EXPECT_EQ(test, path->hops[1].nfc_credits, 0U);
+ KUNIT_EXPECT_EQ(test, path->hops[1].initial_credits, 14U);
+
+ path = dma_tunnel1->paths[1];
+ KUNIT_ASSERT_EQ(test, path->path_length, 2);
+ KUNIT_EXPECT_EQ(test, path->hops[0].nfc_credits, 0U);
+ KUNIT_EXPECT_EQ(test, path->hops[0].initial_credits, 0U);
+ KUNIT_EXPECT_EQ(test, path->hops[1].nfc_credits, 0U);
+ KUNIT_EXPECT_EQ(test, path->hops[1].initial_credits, 14U);
+
+ return dma_tunnel1;
+}
+
+static struct tb_tunnel *TB_TEST_DMA_TUNNEL2(struct kunit *test,
+ struct tb_switch *host, struct tb_switch *dev)
+{
+ struct tb_port *nhi, *port;
+ struct tb_tunnel *dma_tunnel2;
+ struct tb_path *path;
+
+ nhi = &host->ports[7];
+ port = &dev->ports[3];
+ dma_tunnel2 = tb_tunnel_alloc_dma(NULL, nhi, port, 9, 2, 9, 2);
+ KUNIT_ASSERT_NOT_NULL(test, dma_tunnel2);
+ KUNIT_ASSERT_EQ(test, dma_tunnel2->npaths, (size_t)2);
+
+ path = dma_tunnel2->paths[0];
+ KUNIT_ASSERT_EQ(test, path->path_length, 2);
+ KUNIT_EXPECT_EQ(test, path->hops[0].nfc_credits, 0U);
+ KUNIT_EXPECT_EQ(test, path->hops[0].initial_credits, 14U);
+ KUNIT_EXPECT_EQ(test, path->hops[1].nfc_credits, 0U);
+ KUNIT_EXPECT_EQ(test, path->hops[1].initial_credits, 1U);
+
+ path = dma_tunnel2->paths[1];
+ KUNIT_ASSERT_EQ(test, path->path_length, 2);
+ KUNIT_EXPECT_EQ(test, path->hops[0].nfc_credits, 0U);
+ KUNIT_EXPECT_EQ(test, path->hops[0].initial_credits, 0U);
+ KUNIT_EXPECT_EQ(test, path->hops[1].nfc_credits, 0U);
+ KUNIT_EXPECT_EQ(test, path->hops[1].initial_credits, 1U);
+
+ return dma_tunnel2;
+}
+
+static void tb_test_credit_alloc_all(struct kunit *test)
+{
+ struct tb_tunnel *pcie_tunnel, *dp_tunnel1, *dp_tunnel2, *usb3_tunnel;
+ struct tb_tunnel *dma_tunnel1, *dma_tunnel2;
+ struct tb_switch *host, *dev;
+
+ /*
+ * Create PCIe, 2 x DP, USB 3.x and two DMA tunnels from host to
+ * device. Expectation is that all these can be established with
+ * the default credit allocation found in Intel hardware.
+ */
+
+ host = alloc_host_usb4(test);
+ dev = alloc_dev_usb4(test, host, 0x1, true);
+
+ pcie_tunnel = TB_TEST_PCIE_TUNNEL(test, host, dev);
+ dp_tunnel1 = TB_TEST_DP_TUNNEL1(test, host, dev);
+ dp_tunnel2 = TB_TEST_DP_TUNNEL2(test, host, dev);
+ usb3_tunnel = TB_TEST_USB3_TUNNEL(test, host, dev);
+ dma_tunnel1 = TB_TEST_DMA_TUNNEL1(test, host, dev);
+ dma_tunnel2 = TB_TEST_DMA_TUNNEL2(test, host, dev);
+
+ tb_tunnel_free(dma_tunnel2);
+ tb_tunnel_free(dma_tunnel1);
+ tb_tunnel_free(usb3_tunnel);
+ tb_tunnel_free(dp_tunnel2);
+ tb_tunnel_free(dp_tunnel1);
+ tb_tunnel_free(pcie_tunnel);
+}
+
+static const u32 root_directory[] = {
+ 0x55584401, /* "UXD" v1 */
+ 0x00000018, /* Root directory length */
+ 0x76656e64, /* "vend" */
+ 0x6f726964, /* "orid" */
+ 0x76000001, /* "v" R 1 */
+ 0x00000a27, /* Immediate value, ! Vendor ID */
+ 0x76656e64, /* "vend" */
+ 0x6f726964, /* "orid" */
+ 0x74000003, /* "t" R 3 */
+ 0x0000001a, /* Text leaf offset, (“Apple Inc.”) */
+ 0x64657669, /* "devi" */
+ 0x63656964, /* "ceid" */
+ 0x76000001, /* "v" R 1 */
+ 0x0000000a, /* Immediate value, ! Device ID */
+ 0x64657669, /* "devi" */
+ 0x63656964, /* "ceid" */
+ 0x74000003, /* "t" R 3 */
+ 0x0000001d, /* Text leaf offset, (“Macintosh”) */
+ 0x64657669, /* "devi" */
+ 0x63657276, /* "cerv" */
+ 0x76000001, /* "v" R 1 */
+ 0x80000100, /* Immediate value, Device Revision */
+ 0x6e657477, /* "netw" */
+ 0x6f726b00, /* "ork" */
+ 0x44000014, /* "D" R 20 */
+ 0x00000021, /* Directory data offset, (Network Directory) */
+ 0x4170706c, /* "Appl" */
+ 0x6520496e, /* "e In" */
+ 0x632e0000, /* "c." ! */
+ 0x4d616369, /* "Maci" */
+ 0x6e746f73, /* "ntos" */
+ 0x68000000, /* "h" */
+ 0x00000000, /* padding */
+ 0xca8961c6, /* Directory UUID, Network Directory */
+ 0x9541ce1c, /* Directory UUID, Network Directory */
+ 0x5949b8bd, /* Directory UUID, Network Directory */
+ 0x4f5a5f2e, /* Directory UUID, Network Directory */
+ 0x70727463, /* "prtc" */
+ 0x69640000, /* "id" */
+ 0x76000001, /* "v" R 1 */
+ 0x00000001, /* Immediate value, Network Protocol ID */
+ 0x70727463, /* "prtc" */
+ 0x76657273, /* "vers" */
+ 0x76000001, /* "v" R 1 */
+ 0x00000001, /* Immediate value, Network Protocol Version */
+ 0x70727463, /* "prtc" */
+ 0x72657673, /* "revs" */
+ 0x76000001, /* "v" R 1 */
+ 0x00000001, /* Immediate value, Network Protocol Revision */
+ 0x70727463, /* "prtc" */
+ 0x73746e73, /* "stns" */
+ 0x76000001, /* "v" R 1 */
+ 0x00000000, /* Immediate value, Network Protocol Settings */
+};
+
+static const uuid_t network_dir_uuid =
+ UUID_INIT(0xc66189ca, 0x1cce, 0x4195,
+ 0xbd, 0xb8, 0x49, 0x59, 0x2e, 0x5f, 0x5a, 0x4f);
+
+static void tb_test_property_parse(struct kunit *test)
+{
+ struct tb_property_dir *dir, *network_dir;
+ struct tb_property *p;
+
+ dir = tb_property_parse_dir(root_directory, ARRAY_SIZE(root_directory));
+ KUNIT_ASSERT_NOT_NULL(test, dir);
+
+ p = tb_property_find(dir, "foo", TB_PROPERTY_TYPE_TEXT);
+ KUNIT_ASSERT_NULL(test, p);
+
+ p = tb_property_find(dir, "vendorid", TB_PROPERTY_TYPE_TEXT);
+ KUNIT_ASSERT_NOT_NULL(test, p);
+ KUNIT_EXPECT_STREQ(test, p->value.text, "Apple Inc.");
+
+ p = tb_property_find(dir, "vendorid", TB_PROPERTY_TYPE_VALUE);
+ KUNIT_ASSERT_NOT_NULL(test, p);
+ KUNIT_EXPECT_EQ(test, p->value.immediate, 0xa27);
+
+ p = tb_property_find(dir, "deviceid", TB_PROPERTY_TYPE_TEXT);
+ KUNIT_ASSERT_NOT_NULL(test, p);
+ KUNIT_EXPECT_STREQ(test, p->value.text, "Macintosh");
+
+ p = tb_property_find(dir, "deviceid", TB_PROPERTY_TYPE_VALUE);
+ KUNIT_ASSERT_NOT_NULL(test, p);
+ KUNIT_EXPECT_EQ(test, p->value.immediate, 0xa);
+
+ p = tb_property_find(dir, "missing", TB_PROPERTY_TYPE_DIRECTORY);
+ KUNIT_ASSERT_NULL(test, p);
+
+ p = tb_property_find(dir, "network", TB_PROPERTY_TYPE_DIRECTORY);
+ KUNIT_ASSERT_NOT_NULL(test, p);
+
+ network_dir = p->value.dir;
+ KUNIT_EXPECT_TRUE(test, uuid_equal(network_dir->uuid, &network_dir_uuid));
+
+ p = tb_property_find(network_dir, "prtcid", TB_PROPERTY_TYPE_VALUE);
+ KUNIT_ASSERT_NOT_NULL(test, p);
+ KUNIT_EXPECT_EQ(test, p->value.immediate, 0x1);
+
+ p = tb_property_find(network_dir, "prtcvers", TB_PROPERTY_TYPE_VALUE);
+ KUNIT_ASSERT_NOT_NULL(test, p);
+ KUNIT_EXPECT_EQ(test, p->value.immediate, 0x1);
+
+ p = tb_property_find(network_dir, "prtcrevs", TB_PROPERTY_TYPE_VALUE);
+ KUNIT_ASSERT_NOT_NULL(test, p);
+ KUNIT_EXPECT_EQ(test, p->value.immediate, 0x1);
+
+ p = tb_property_find(network_dir, "prtcstns", TB_PROPERTY_TYPE_VALUE);
+ KUNIT_ASSERT_NOT_NULL(test, p);
+ KUNIT_EXPECT_EQ(test, p->value.immediate, 0x0);
+
+ p = tb_property_find(network_dir, "deviceid", TB_PROPERTY_TYPE_VALUE);
+ KUNIT_EXPECT_TRUE(test, !p);
+ p = tb_property_find(network_dir, "deviceid", TB_PROPERTY_TYPE_TEXT);
+ KUNIT_EXPECT_TRUE(test, !p);
+
+ tb_property_free_dir(dir);
+}
+
+static void tb_test_property_format(struct kunit *test)
+{
+ struct tb_property_dir *dir;
+ ssize_t block_len;
+ u32 *block;
+ int ret, i;
+
+ dir = tb_property_parse_dir(root_directory, ARRAY_SIZE(root_directory));
+ KUNIT_ASSERT_NOT_NULL(test, dir);
+
+ ret = tb_property_format_dir(dir, NULL, 0);
+ KUNIT_ASSERT_EQ(test, ret, ARRAY_SIZE(root_directory));
+
+ block_len = ret;
+
+ block = kunit_kzalloc(test, block_len * sizeof(u32), GFP_KERNEL);
+ KUNIT_ASSERT_NOT_NULL(test, block);
+
+ ret = tb_property_format_dir(dir, block, block_len);
+ KUNIT_EXPECT_EQ(test, ret, 0);
+
+ for (i = 0; i < ARRAY_SIZE(root_directory); i++)
+ KUNIT_EXPECT_EQ(test, root_directory[i], block[i]);
+
+ tb_property_free_dir(dir);
+}
+
+static void compare_dirs(struct kunit *test, struct tb_property_dir *d1,
+ struct tb_property_dir *d2)
+{
+ struct tb_property *p1, *p2, *tmp;
+ int n1, n2, i;
+
+ if (d1->uuid) {
+ KUNIT_ASSERT_NOT_NULL(test, d2->uuid);
+ KUNIT_ASSERT_TRUE(test, uuid_equal(d1->uuid, d2->uuid));
+ } else {
+ KUNIT_ASSERT_NULL(test, d2->uuid);
+ }
+
+ n1 = 0;
+ tb_property_for_each(d1, tmp)
+ n1++;
+ KUNIT_ASSERT_NE(test, n1, 0);
+
+ n2 = 0;
+ tb_property_for_each(d2, tmp)
+ n2++;
+ KUNIT_ASSERT_NE(test, n2, 0);
+
+ KUNIT_ASSERT_EQ(test, n1, n2);
+
+ p1 = NULL;
+ p2 = NULL;
+ for (i = 0; i < n1; i++) {
+ p1 = tb_property_get_next(d1, p1);
+ KUNIT_ASSERT_NOT_NULL(test, p1);
+ p2 = tb_property_get_next(d2, p2);
+ KUNIT_ASSERT_NOT_NULL(test, p2);
+
+ KUNIT_ASSERT_STREQ(test, &p1->key[0], &p2->key[0]);
+ KUNIT_ASSERT_EQ(test, p1->type, p2->type);
+ KUNIT_ASSERT_EQ(test, p1->length, p2->length);
+
+ switch (p1->type) {
+ case TB_PROPERTY_TYPE_DIRECTORY:
+ KUNIT_ASSERT_NOT_NULL(test, p1->value.dir);
+ KUNIT_ASSERT_NOT_NULL(test, p2->value.dir);
+ compare_dirs(test, p1->value.dir, p2->value.dir);
+ break;
+
+ case TB_PROPERTY_TYPE_DATA:
+ KUNIT_ASSERT_NOT_NULL(test, p1->value.data);
+ KUNIT_ASSERT_NOT_NULL(test, p2->value.data);
+ KUNIT_ASSERT_TRUE(test,
+ !memcmp(p1->value.data, p2->value.data,
+ p1->length * 4)
+ );
+ break;
+
+ case TB_PROPERTY_TYPE_TEXT:
+ KUNIT_ASSERT_NOT_NULL(test, p1->value.text);
+ KUNIT_ASSERT_NOT_NULL(test, p2->value.text);
+ KUNIT_ASSERT_STREQ(test, p1->value.text, p2->value.text);
+ break;
+
+ case TB_PROPERTY_TYPE_VALUE:
+ KUNIT_ASSERT_EQ(test, p1->value.immediate,
+ p2->value.immediate);
+ break;
+ default:
+ KUNIT_FAIL(test, "unexpected property type");
+ break;
+ }
+ }
+}
+
+static void tb_test_property_copy(struct kunit *test)
+{
+ struct tb_property_dir *src, *dst;
+ u32 *block;
+ int ret, i;
+
+ src = tb_property_parse_dir(root_directory, ARRAY_SIZE(root_directory));
+ KUNIT_ASSERT_NOT_NULL(test, src);
+
+ dst = tb_property_copy_dir(src);
+ KUNIT_ASSERT_NOT_NULL(test, dst);
+
+ /* Compare the structures */
+ compare_dirs(test, src, dst);
+
+ /* Compare the resulting property block */
+ ret = tb_property_format_dir(dst, NULL, 0);
+ KUNIT_ASSERT_EQ(test, ret, ARRAY_SIZE(root_directory));
+
+ block = kunit_kzalloc(test, sizeof(root_directory), GFP_KERNEL);
+ KUNIT_ASSERT_NOT_NULL(test, block);
+
+ ret = tb_property_format_dir(dst, block, ARRAY_SIZE(root_directory));
+ KUNIT_EXPECT_TRUE(test, !ret);
+
+ for (i = 0; i < ARRAY_SIZE(root_directory); i++)
+ KUNIT_EXPECT_EQ(test, root_directory[i], block[i]);
+
+ tb_property_free_dir(dst);
+ tb_property_free_dir(src);
+}
+
+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),
+ KUNIT_CASE(tb_test_tunnel_dma),
+ KUNIT_CASE(tb_test_tunnel_dma_rx),
+ KUNIT_CASE(tb_test_tunnel_dma_tx),
+ KUNIT_CASE(tb_test_tunnel_dma_chain),
+ KUNIT_CASE(tb_test_tunnel_dma_match),
+ KUNIT_CASE(tb_test_credit_alloc_legacy_not_bonded),
+ KUNIT_CASE(tb_test_credit_alloc_legacy_bonded),
+ KUNIT_CASE(tb_test_credit_alloc_pcie),
+ KUNIT_CASE(tb_test_credit_alloc_without_dp),
+ KUNIT_CASE(tb_test_credit_alloc_dp),
+ KUNIT_CASE(tb_test_credit_alloc_usb3),
+ KUNIT_CASE(tb_test_credit_alloc_dma),
+ KUNIT_CASE(tb_test_credit_alloc_dma_multiple),
+ KUNIT_CASE(tb_test_credit_alloc_all),
+ KUNIT_CASE(tb_test_property_parse),
+ KUNIT_CASE(tb_test_property_format),
+ KUNIT_CASE(tb_test_property_copy),
+ { }
+};
+
+static struct kunit_suite tb_test_suite = {
+ .name = "thunderbolt",
+ .test_cases = tb_test_cases,
+};
+
+kunit_test_suite(tb_test_suite);
generated by cgit v1.2.3 (git 2.39.1) at 2024-09-23 06:39:26 +0000