1b2441318SGreg Kroah-Hartman // SPDX-License-Identifier: GPL-2.0 2d6cc51cdSAndreas Noever /* 399cabbb0SMika Westerberg * Thunderbolt driver - bus logic (NHI independent) 4d6cc51cdSAndreas Noever * 5d6cc51cdSAndreas Noever * Copyright (c) 2014 Andreas Noever <andreas.noever@gmail.com> 699cabbb0SMika Westerberg * Copyright (C) 2019, Intel Corporation 7d6cc51cdSAndreas Noever */ 8d6cc51cdSAndreas Noever 9d6cc51cdSAndreas Noever #include <linux/slab.h> 10d6cc51cdSAndreas Noever #include <linux/errno.h> 11d6cc51cdSAndreas Noever #include <linux/delay.h> 126ac6faeeSMika Westerberg #include <linux/pm_runtime.h> 13349bfe08SMika Westerberg #include <linux/platform_data/x86/apple.h> 14d6cc51cdSAndreas Noever 15d6cc51cdSAndreas Noever #include "tb.h" 167adf6097SAndreas Noever #include "tb_regs.h" 171752b9f7SMika Westerberg #include "tunnel.h" 18d6cc51cdSAndreas Noever 197f0a34d7SMika Westerberg #define TB_TIMEOUT 100 /* ms */ 206ce35635SMika Westerberg #define MAX_GROUPS 7 /* max Group_ID is 7 */ 217f0a34d7SMika Westerberg 229d3cce0bSMika Westerberg /** 239d3cce0bSMika Westerberg * struct tb_cm - Simple Thunderbolt connection manager 249d3cce0bSMika Westerberg * @tunnel_list: List of active tunnels 258afe909bSMika Westerberg * @dp_resources: List of available DP resources for DP tunneling 269d3cce0bSMika Westerberg * @hotplug_active: tb_handle_hotplug will stop progressing plug 279d3cce0bSMika Westerberg * events and exit if this is not set (it needs to 289d3cce0bSMika Westerberg * acquire the lock one more time). Used to drain wq 299d3cce0bSMika Westerberg * after cfg has been paused. 306ac6faeeSMika Westerberg * @remove_work: Work used to remove any unplugged routers after 316ac6faeeSMika Westerberg * runtime resume 326ce35635SMika Westerberg * @groups: Bandwidth groups used in this domain. 339d3cce0bSMika Westerberg */ 349d3cce0bSMika Westerberg struct tb_cm { 359d3cce0bSMika Westerberg struct list_head tunnel_list; 368afe909bSMika Westerberg struct list_head dp_resources; 379d3cce0bSMika Westerberg bool hotplug_active; 386ac6faeeSMika Westerberg struct delayed_work remove_work; 396ce35635SMika Westerberg struct tb_bandwidth_group groups[MAX_GROUPS]; 409d3cce0bSMika Westerberg }; 419da672a4SAndreas Noever 426ac6faeeSMika Westerberg static inline struct tb *tcm_to_tb(struct tb_cm *tcm) 436ac6faeeSMika Westerberg { 446ac6faeeSMika Westerberg return ((void *)tcm - sizeof(struct tb)); 456ac6faeeSMika Westerberg } 466ac6faeeSMika Westerberg 474f807e47SMika Westerberg struct tb_hotplug_event { 484f807e47SMika Westerberg struct work_struct work; 494f807e47SMika Westerberg struct tb *tb; 504f807e47SMika Westerberg u64 route; 514f807e47SMika Westerberg u8 port; 524f807e47SMika Westerberg bool unplug; 534f807e47SMika Westerberg }; 544f807e47SMika Westerberg 556ce35635SMika Westerberg static void tb_init_bandwidth_groups(struct tb_cm *tcm) 566ce35635SMika Westerberg { 576ce35635SMika Westerberg int i; 586ce35635SMika Westerberg 596ce35635SMika Westerberg for (i = 0; i < ARRAY_SIZE(tcm->groups); i++) { 606ce35635SMika Westerberg struct tb_bandwidth_group *group = &tcm->groups[i]; 616ce35635SMika Westerberg 626ce35635SMika Westerberg group->tb = tcm_to_tb(tcm); 636ce35635SMika Westerberg group->index = i + 1; 646ce35635SMika Westerberg INIT_LIST_HEAD(&group->ports); 656ce35635SMika Westerberg } 666ce35635SMika Westerberg } 676ce35635SMika Westerberg 686ce35635SMika Westerberg static void tb_bandwidth_group_attach_port(struct tb_bandwidth_group *group, 696ce35635SMika Westerberg struct tb_port *in) 706ce35635SMika Westerberg { 716ce35635SMika Westerberg if (!group || WARN_ON(in->group)) 726ce35635SMika Westerberg return; 736ce35635SMika Westerberg 746ce35635SMika Westerberg in->group = group; 756ce35635SMika Westerberg list_add_tail(&in->group_list, &group->ports); 766ce35635SMika Westerberg 776ce35635SMika Westerberg tb_port_dbg(in, "attached to bandwidth group %d\n", group->index); 786ce35635SMika Westerberg } 796ce35635SMika Westerberg 806ce35635SMika Westerberg static struct tb_bandwidth_group *tb_find_free_bandwidth_group(struct tb_cm *tcm) 816ce35635SMika Westerberg { 826ce35635SMika Westerberg int i; 836ce35635SMika Westerberg 846ce35635SMika Westerberg for (i = 0; i < ARRAY_SIZE(tcm->groups); i++) { 856ce35635SMika Westerberg struct tb_bandwidth_group *group = &tcm->groups[i]; 866ce35635SMika Westerberg 876ce35635SMika Westerberg if (list_empty(&group->ports)) 886ce35635SMika Westerberg return group; 896ce35635SMika Westerberg } 906ce35635SMika Westerberg 916ce35635SMika Westerberg return NULL; 926ce35635SMika Westerberg } 936ce35635SMika Westerberg 946ce35635SMika Westerberg static struct tb_bandwidth_group * 956ce35635SMika Westerberg tb_attach_bandwidth_group(struct tb_cm *tcm, struct tb_port *in, 966ce35635SMika Westerberg struct tb_port *out) 976ce35635SMika Westerberg { 986ce35635SMika Westerberg struct tb_bandwidth_group *group; 996ce35635SMika Westerberg struct tb_tunnel *tunnel; 1006ce35635SMika Westerberg 1016ce35635SMika Westerberg /* 1026ce35635SMika Westerberg * Find all DP tunnels that go through all the same USB4 links 1036ce35635SMika Westerberg * as this one. Because we always setup tunnels the same way we 1046ce35635SMika Westerberg * can just check for the routers at both ends of the tunnels 1056ce35635SMika Westerberg * and if they are the same we have a match. 1066ce35635SMika Westerberg */ 1076ce35635SMika Westerberg list_for_each_entry(tunnel, &tcm->tunnel_list, list) { 1086ce35635SMika Westerberg if (!tb_tunnel_is_dp(tunnel)) 1096ce35635SMika Westerberg continue; 1106ce35635SMika Westerberg 1116ce35635SMika Westerberg if (tunnel->src_port->sw == in->sw && 1126ce35635SMika Westerberg tunnel->dst_port->sw == out->sw) { 1136ce35635SMika Westerberg group = tunnel->src_port->group; 1146ce35635SMika Westerberg if (group) { 1156ce35635SMika Westerberg tb_bandwidth_group_attach_port(group, in); 1166ce35635SMika Westerberg return group; 1176ce35635SMika Westerberg } 1186ce35635SMika Westerberg } 1196ce35635SMika Westerberg } 1206ce35635SMika Westerberg 1216ce35635SMika Westerberg /* Pick up next available group then */ 1226ce35635SMika Westerberg group = tb_find_free_bandwidth_group(tcm); 1236ce35635SMika Westerberg if (group) 1246ce35635SMika Westerberg tb_bandwidth_group_attach_port(group, in); 1256ce35635SMika Westerberg else 1266ce35635SMika Westerberg tb_port_warn(in, "no available bandwidth groups\n"); 1276ce35635SMika Westerberg 1286ce35635SMika Westerberg return group; 1296ce35635SMika Westerberg } 1306ce35635SMika Westerberg 1316ce35635SMika Westerberg static void tb_discover_bandwidth_group(struct tb_cm *tcm, struct tb_port *in, 1326ce35635SMika Westerberg struct tb_port *out) 1336ce35635SMika Westerberg { 1346ce35635SMika Westerberg if (usb4_dp_port_bw_mode_enabled(in)) { 1356ce35635SMika Westerberg int index, i; 1366ce35635SMika Westerberg 1376ce35635SMika Westerberg index = usb4_dp_port_group_id(in); 1386ce35635SMika Westerberg for (i = 0; i < ARRAY_SIZE(tcm->groups); i++) { 1396ce35635SMika Westerberg if (tcm->groups[i].index == index) { 1406ce35635SMika Westerberg tb_bandwidth_group_attach_port(&tcm->groups[i], in); 1416ce35635SMika Westerberg return; 1426ce35635SMika Westerberg } 1436ce35635SMika Westerberg } 1446ce35635SMika Westerberg } 1456ce35635SMika Westerberg 1466ce35635SMika Westerberg tb_attach_bandwidth_group(tcm, in, out); 1476ce35635SMika Westerberg } 1486ce35635SMika Westerberg 1496ce35635SMika Westerberg static void tb_detach_bandwidth_group(struct tb_port *in) 1506ce35635SMika Westerberg { 1516ce35635SMika Westerberg struct tb_bandwidth_group *group = in->group; 1526ce35635SMika Westerberg 1536ce35635SMika Westerberg if (group) { 1546ce35635SMika Westerberg in->group = NULL; 1556ce35635SMika Westerberg list_del_init(&in->group_list); 1566ce35635SMika Westerberg 1576ce35635SMika Westerberg tb_port_dbg(in, "detached from bandwidth group %d\n", group->index); 1586ce35635SMika Westerberg } 1596ce35635SMika Westerberg } 1606ce35635SMika Westerberg 1614f807e47SMika Westerberg static void tb_handle_hotplug(struct work_struct *work); 1624f807e47SMika Westerberg 1634f807e47SMika Westerberg static void tb_queue_hotplug(struct tb *tb, u64 route, u8 port, bool unplug) 1644f807e47SMika Westerberg { 1654f807e47SMika Westerberg struct tb_hotplug_event *ev; 1664f807e47SMika Westerberg 1674f807e47SMika Westerberg ev = kmalloc(sizeof(*ev), GFP_KERNEL); 1684f807e47SMika Westerberg if (!ev) 1694f807e47SMika Westerberg return; 1704f807e47SMika Westerberg 1714f807e47SMika Westerberg ev->tb = tb; 1724f807e47SMika Westerberg ev->route = route; 1734f807e47SMika Westerberg ev->port = port; 1744f807e47SMika Westerberg ev->unplug = unplug; 1754f807e47SMika Westerberg INIT_WORK(&ev->work, tb_handle_hotplug); 1764f807e47SMika Westerberg queue_work(tb->wq, &ev->work); 1774f807e47SMika Westerberg } 1784f807e47SMika Westerberg 1799da672a4SAndreas Noever /* enumeration & hot plug handling */ 1809da672a4SAndreas Noever 1818afe909bSMika Westerberg static void tb_add_dp_resources(struct tb_switch *sw) 1828afe909bSMika Westerberg { 1838afe909bSMika Westerberg struct tb_cm *tcm = tb_priv(sw->tb); 1848afe909bSMika Westerberg struct tb_port *port; 1858afe909bSMika Westerberg 1868afe909bSMika Westerberg tb_switch_for_each_port(sw, port) { 1878afe909bSMika Westerberg if (!tb_port_is_dpin(port)) 1888afe909bSMika Westerberg continue; 1898afe909bSMika Westerberg 1908afe909bSMika Westerberg if (!tb_switch_query_dp_resource(sw, port)) 1918afe909bSMika Westerberg continue; 1928afe909bSMika Westerberg 1938afe909bSMika Westerberg list_add_tail(&port->list, &tcm->dp_resources); 1948afe909bSMika Westerberg tb_port_dbg(port, "DP IN resource available\n"); 1958afe909bSMika Westerberg } 1968afe909bSMika Westerberg } 1978afe909bSMika Westerberg 1988afe909bSMika Westerberg static void tb_remove_dp_resources(struct tb_switch *sw) 1998afe909bSMika Westerberg { 2008afe909bSMika Westerberg struct tb_cm *tcm = tb_priv(sw->tb); 2018afe909bSMika Westerberg struct tb_port *port, *tmp; 2028afe909bSMika Westerberg 2038afe909bSMika Westerberg /* Clear children resources first */ 2048afe909bSMika Westerberg tb_switch_for_each_port(sw, port) { 2058afe909bSMika Westerberg if (tb_port_has_remote(port)) 2068afe909bSMika Westerberg tb_remove_dp_resources(port->remote->sw); 2078afe909bSMika Westerberg } 2088afe909bSMika Westerberg 2098afe909bSMika Westerberg list_for_each_entry_safe(port, tmp, &tcm->dp_resources, list) { 2108afe909bSMika Westerberg if (port->sw == sw) { 2118afe909bSMika Westerberg tb_port_dbg(port, "DP OUT resource unavailable\n"); 2128afe909bSMika Westerberg list_del_init(&port->list); 2138afe909bSMika Westerberg } 2148afe909bSMika Westerberg } 2158afe909bSMika Westerberg } 2168afe909bSMika Westerberg 217b60e31bfSSanjay R Mehta static void tb_discover_dp_resource(struct tb *tb, struct tb_port *port) 218b60e31bfSSanjay R Mehta { 219b60e31bfSSanjay R Mehta struct tb_cm *tcm = tb_priv(tb); 220b60e31bfSSanjay R Mehta struct tb_port *p; 221b60e31bfSSanjay R Mehta 222b60e31bfSSanjay R Mehta list_for_each_entry(p, &tcm->dp_resources, list) { 223b60e31bfSSanjay R Mehta if (p == port) 224b60e31bfSSanjay R Mehta return; 225b60e31bfSSanjay R Mehta } 226b60e31bfSSanjay R Mehta 227b60e31bfSSanjay R Mehta tb_port_dbg(port, "DP %s resource available discovered\n", 228b60e31bfSSanjay R Mehta tb_port_is_dpin(port) ? "IN" : "OUT"); 229b60e31bfSSanjay R Mehta list_add_tail(&port->list, &tcm->dp_resources); 230b60e31bfSSanjay R Mehta } 231b60e31bfSSanjay R Mehta 232b60e31bfSSanjay R Mehta static void tb_discover_dp_resources(struct tb *tb) 233b60e31bfSSanjay R Mehta { 234b60e31bfSSanjay R Mehta struct tb_cm *tcm = tb_priv(tb); 235b60e31bfSSanjay R Mehta struct tb_tunnel *tunnel; 236b60e31bfSSanjay R Mehta 237b60e31bfSSanjay R Mehta list_for_each_entry(tunnel, &tcm->tunnel_list, list) { 238b60e31bfSSanjay R Mehta if (tb_tunnel_is_dp(tunnel)) 239b60e31bfSSanjay R Mehta tb_discover_dp_resource(tb, tunnel->dst_port); 240b60e31bfSSanjay R Mehta } 241b60e31bfSSanjay R Mehta } 242b60e31bfSSanjay R Mehta 2431a9b6cb8SMika Westerberg static int tb_enable_clx(struct tb_switch *sw) 2441a9b6cb8SMika Westerberg { 2451a9b6cb8SMika Westerberg int ret; 2461a9b6cb8SMika Westerberg 2471a9b6cb8SMika Westerberg /* 2481a9b6cb8SMika Westerberg * CL0s and CL1 are enabled and supported together. 2491a9b6cb8SMika Westerberg * Silently ignore CLx enabling in case CLx is not supported. 2501a9b6cb8SMika Westerberg */ 251*35627353SMika Westerberg ret = tb_switch_clx_enable(sw, TB_CL0S | TB_CL1); 2521a9b6cb8SMika Westerberg return ret == -EOPNOTSUPP ? 0 : ret; 2531a9b6cb8SMika Westerberg } 2541a9b6cb8SMika Westerberg 2557d283f41SMika Westerberg static int tb_increase_switch_tmu_accuracy(struct device *dev, void *data) 2567d283f41SMika Westerberg { 2577d283f41SMika Westerberg struct tb_switch *sw; 2587d283f41SMika Westerberg 2597d283f41SMika Westerberg sw = tb_to_switch(dev); 2607d283f41SMika Westerberg if (sw) { 2617d283f41SMika Westerberg tb_switch_tmu_configure(sw, TB_SWITCH_TMU_RATE_HIFI, 26212a14f2fSMika Westerberg tb_switch_clx_is_enabled(sw, TB_CL1)); 2637d283f41SMika Westerberg if (tb_switch_tmu_enable(sw)) 2647d283f41SMika Westerberg tb_sw_warn(sw, "failed to increase TMU rate\n"); 2657d283f41SMika Westerberg } 2667d283f41SMika Westerberg 2677d283f41SMika Westerberg return 0; 2687d283f41SMika Westerberg } 2697d283f41SMika Westerberg 2707d283f41SMika Westerberg static void tb_increase_tmu_accuracy(struct tb_tunnel *tunnel) 2717d283f41SMika Westerberg { 2727d283f41SMika Westerberg struct tb_switch *sw; 2737d283f41SMika Westerberg 2747d283f41SMika Westerberg if (!tunnel) 2757d283f41SMika Westerberg return; 2767d283f41SMika Westerberg 2777d283f41SMika Westerberg /* 2787d283f41SMika Westerberg * Once first DP tunnel is established we change the TMU 2797d283f41SMika Westerberg * accuracy of first depth child routers (and the host router) 2807d283f41SMika Westerberg * to the highest. This is needed for the DP tunneling to work 2817d283f41SMika Westerberg * but also allows CL0s. 2827d283f41SMika Westerberg */ 2837d283f41SMika Westerberg sw = tunnel->tb->root_switch; 2847d283f41SMika Westerberg device_for_each_child(&sw->dev, NULL, tb_increase_switch_tmu_accuracy); 2857d283f41SMika Westerberg } 2867d283f41SMika Westerberg 2874e7b4955SMika Westerberg static int tb_enable_tmu(struct tb_switch *sw) 2884e7b4955SMika Westerberg { 2894e7b4955SMika Westerberg int ret; 2904e7b4955SMika Westerberg 2914e7b4955SMika Westerberg /* 2924e7b4955SMika Westerberg * If CL1 is enabled then we need to configure the TMU accuracy 2934e7b4955SMika Westerberg * level to normal. Otherwise we keep the TMU running at the 2944e7b4955SMika Westerberg * highest accuracy. 2954e7b4955SMika Westerberg */ 29612a14f2fSMika Westerberg if (tb_switch_clx_is_enabled(sw, TB_CL1)) 297ef34add8SMika Westerberg ret = tb_switch_tmu_configure(sw, TB_SWITCH_TMU_RATE_NORMAL, true); 2984e7b4955SMika Westerberg else 299ef34add8SMika Westerberg ret = tb_switch_tmu_configure(sw, TB_SWITCH_TMU_RATE_HIFI, false); 300ef34add8SMika Westerberg if (ret) 301ef34add8SMika Westerberg return ret; 3024e7b4955SMika Westerberg 3034e7b4955SMika Westerberg /* If it is already enabled in correct mode, don't touch it */ 3044e7b4955SMika Westerberg if (tb_switch_tmu_is_enabled(sw)) 3054e7b4955SMika Westerberg return 0; 3064e7b4955SMika Westerberg 3074e7b4955SMika Westerberg ret = tb_switch_tmu_disable(sw); 3084e7b4955SMika Westerberg if (ret) 3094e7b4955SMika Westerberg return ret; 3104e7b4955SMika Westerberg 3114e7b4955SMika Westerberg ret = tb_switch_tmu_post_time(sw); 3124e7b4955SMika Westerberg if (ret) 3134e7b4955SMika Westerberg return ret; 3144e7b4955SMika Westerberg 3154e7b4955SMika Westerberg return tb_switch_tmu_enable(sw); 3164e7b4955SMika Westerberg } 3174e7b4955SMika Westerberg 31843bddb26SMika Westerberg static void tb_switch_discover_tunnels(struct tb_switch *sw, 31943bddb26SMika Westerberg struct list_head *list, 32043bddb26SMika Westerberg bool alloc_hopids) 3210414bec5SMika Westerberg { 3220414bec5SMika Westerberg struct tb *tb = sw->tb; 3230414bec5SMika Westerberg struct tb_port *port; 3240414bec5SMika Westerberg 325b433d010SMika Westerberg tb_switch_for_each_port(sw, port) { 3260414bec5SMika Westerberg struct tb_tunnel *tunnel = NULL; 3270414bec5SMika Westerberg 3280414bec5SMika Westerberg switch (port->config.type) { 3294f807e47SMika Westerberg case TB_TYPE_DP_HDMI_IN: 33043bddb26SMika Westerberg tunnel = tb_tunnel_discover_dp(tb, port, alloc_hopids); 3317d283f41SMika Westerberg tb_increase_tmu_accuracy(tunnel); 3324f807e47SMika Westerberg break; 3334f807e47SMika Westerberg 3340414bec5SMika Westerberg case TB_TYPE_PCIE_DOWN: 33543bddb26SMika Westerberg tunnel = tb_tunnel_discover_pci(tb, port, alloc_hopids); 3360414bec5SMika Westerberg break; 3370414bec5SMika Westerberg 338e6f81858SRajmohan Mani case TB_TYPE_USB3_DOWN: 33943bddb26SMika Westerberg tunnel = tb_tunnel_discover_usb3(tb, port, alloc_hopids); 340e6f81858SRajmohan Mani break; 341e6f81858SRajmohan Mani 3420414bec5SMika Westerberg default: 3430414bec5SMika Westerberg break; 3440414bec5SMika Westerberg } 3450414bec5SMika Westerberg 34643bddb26SMika Westerberg if (tunnel) 34743bddb26SMika Westerberg list_add_tail(&tunnel->list, list); 34843bddb26SMika Westerberg } 3494f807e47SMika Westerberg 35043bddb26SMika Westerberg tb_switch_for_each_port(sw, port) { 35143bddb26SMika Westerberg if (tb_port_has_remote(port)) { 35243bddb26SMika Westerberg tb_switch_discover_tunnels(port->remote->sw, list, 35343bddb26SMika Westerberg alloc_hopids); 35443bddb26SMika Westerberg } 35543bddb26SMika Westerberg } 35643bddb26SMika Westerberg } 35743bddb26SMika Westerberg 35843bddb26SMika Westerberg static void tb_discover_tunnels(struct tb *tb) 35943bddb26SMika Westerberg { 36043bddb26SMika Westerberg struct tb_cm *tcm = tb_priv(tb); 36143bddb26SMika Westerberg struct tb_tunnel *tunnel; 36243bddb26SMika Westerberg 36343bddb26SMika Westerberg tb_switch_discover_tunnels(tb->root_switch, &tcm->tunnel_list, true); 36443bddb26SMika Westerberg 36543bddb26SMika Westerberg list_for_each_entry(tunnel, &tcm->tunnel_list, list) { 3664f807e47SMika Westerberg if (tb_tunnel_is_pci(tunnel)) { 3670414bec5SMika Westerberg struct tb_switch *parent = tunnel->dst_port->sw; 3680414bec5SMika Westerberg 3690414bec5SMika Westerberg while (parent != tunnel->src_port->sw) { 3700414bec5SMika Westerberg parent->boot = true; 3710414bec5SMika Westerberg parent = tb_switch_parent(parent); 3720414bec5SMika Westerberg } 373c94732bdSMika Westerberg } else if (tb_tunnel_is_dp(tunnel)) { 3746ce35635SMika Westerberg struct tb_port *in = tunnel->src_port; 3756ce35635SMika Westerberg struct tb_port *out = tunnel->dst_port; 3766ce35635SMika Westerberg 377c94732bdSMika Westerberg /* Keep the domain from powering down */ 3786ce35635SMika Westerberg pm_runtime_get_sync(&in->sw->dev); 3796ce35635SMika Westerberg pm_runtime_get_sync(&out->sw->dev); 3806ce35635SMika Westerberg 3816ce35635SMika Westerberg tb_discover_bandwidth_group(tcm, in, out); 3824f807e47SMika Westerberg } 3830414bec5SMika Westerberg } 3840414bec5SMika Westerberg } 3859da672a4SAndreas Noever 386f9cad07bSMika Westerberg static int tb_port_configure_xdomain(struct tb_port *port, struct tb_xdomain *xd) 387284652a4SMika Westerberg { 388284652a4SMika Westerberg if (tb_switch_is_usb4(port->sw)) 389f9cad07bSMika Westerberg return usb4_port_configure_xdomain(port, xd); 390284652a4SMika Westerberg return tb_lc_configure_xdomain(port); 391284652a4SMika Westerberg } 392284652a4SMika Westerberg 393284652a4SMika Westerberg static void tb_port_unconfigure_xdomain(struct tb_port *port) 394284652a4SMika Westerberg { 395284652a4SMika Westerberg if (tb_switch_is_usb4(port->sw)) 396284652a4SMika Westerberg usb4_port_unconfigure_xdomain(port); 397284652a4SMika Westerberg else 398284652a4SMika Westerberg tb_lc_unconfigure_xdomain(port); 399341d4518SMika Westerberg 400341d4518SMika Westerberg tb_port_enable(port->dual_link_port); 401284652a4SMika Westerberg } 402284652a4SMika Westerberg 4037ea4cd6bSMika Westerberg static void tb_scan_xdomain(struct tb_port *port) 4047ea4cd6bSMika Westerberg { 4057ea4cd6bSMika Westerberg struct tb_switch *sw = port->sw; 4067ea4cd6bSMika Westerberg struct tb *tb = sw->tb; 4077ea4cd6bSMika Westerberg struct tb_xdomain *xd; 4087ea4cd6bSMika Westerberg u64 route; 4097ea4cd6bSMika Westerberg 4105ca67688SMika Westerberg if (!tb_is_xdomain_enabled()) 4115ca67688SMika Westerberg return; 4125ca67688SMika Westerberg 4137ea4cd6bSMika Westerberg route = tb_downstream_route(port); 4147ea4cd6bSMika Westerberg xd = tb_xdomain_find_by_route(tb, route); 4157ea4cd6bSMika Westerberg if (xd) { 4167ea4cd6bSMika Westerberg tb_xdomain_put(xd); 4177ea4cd6bSMika Westerberg return; 4187ea4cd6bSMika Westerberg } 4197ea4cd6bSMika Westerberg 4207ea4cd6bSMika Westerberg xd = tb_xdomain_alloc(tb, &sw->dev, route, tb->root_switch->uuid, 4217ea4cd6bSMika Westerberg NULL); 4227ea4cd6bSMika Westerberg if (xd) { 4237ea4cd6bSMika Westerberg tb_port_at(route, sw)->xdomain = xd; 424f9cad07bSMika Westerberg tb_port_configure_xdomain(port, xd); 4257ea4cd6bSMika Westerberg tb_xdomain_add(xd); 4267ea4cd6bSMika Westerberg } 4277ea4cd6bSMika Westerberg } 4287ea4cd6bSMika Westerberg 429e6f81858SRajmohan Mani /** 430e6f81858SRajmohan Mani * tb_find_unused_port() - return the first inactive port on @sw 431e6f81858SRajmohan Mani * @sw: Switch to find the port on 432e6f81858SRajmohan Mani * @type: Port type to look for 433e6f81858SRajmohan Mani */ 434e6f81858SRajmohan Mani static struct tb_port *tb_find_unused_port(struct tb_switch *sw, 435e6f81858SRajmohan Mani enum tb_port_type type) 436e6f81858SRajmohan Mani { 437e6f81858SRajmohan Mani struct tb_port *port; 438e6f81858SRajmohan Mani 439e6f81858SRajmohan Mani tb_switch_for_each_port(sw, port) { 440e6f81858SRajmohan Mani if (tb_is_upstream_port(port)) 441e6f81858SRajmohan Mani continue; 442e6f81858SRajmohan Mani if (port->config.type != type) 443e6f81858SRajmohan Mani continue; 444e6f81858SRajmohan Mani if (!port->cap_adap) 445e6f81858SRajmohan Mani continue; 446e6f81858SRajmohan Mani if (tb_port_is_enabled(port)) 447e6f81858SRajmohan Mani continue; 448e6f81858SRajmohan Mani return port; 449e6f81858SRajmohan Mani } 450e6f81858SRajmohan Mani return NULL; 451e6f81858SRajmohan Mani } 452e6f81858SRajmohan Mani 453e6f81858SRajmohan Mani static struct tb_port *tb_find_usb3_down(struct tb_switch *sw, 454e6f81858SRajmohan Mani const struct tb_port *port) 455e6f81858SRajmohan Mani { 456e6f81858SRajmohan Mani struct tb_port *down; 457e6f81858SRajmohan Mani 458e6f81858SRajmohan Mani down = usb4_switch_map_usb3_down(sw, port); 45977cfa40fSMika Westerberg if (down && !tb_usb3_port_is_enabled(down)) 460e6f81858SRajmohan Mani return down; 46177cfa40fSMika Westerberg return NULL; 462e6f81858SRajmohan Mani } 463e6f81858SRajmohan Mani 4640bd680cdSMika Westerberg static struct tb_tunnel *tb_find_tunnel(struct tb *tb, enum tb_tunnel_type type, 4650bd680cdSMika Westerberg struct tb_port *src_port, 4660bd680cdSMika Westerberg struct tb_port *dst_port) 4670bd680cdSMika Westerberg { 4680bd680cdSMika Westerberg struct tb_cm *tcm = tb_priv(tb); 4690bd680cdSMika Westerberg struct tb_tunnel *tunnel; 4700bd680cdSMika Westerberg 4710bd680cdSMika Westerberg list_for_each_entry(tunnel, &tcm->tunnel_list, list) { 4720bd680cdSMika Westerberg if (tunnel->type == type && 4730bd680cdSMika Westerberg ((src_port && src_port == tunnel->src_port) || 4740bd680cdSMika Westerberg (dst_port && dst_port == tunnel->dst_port))) { 4750bd680cdSMika Westerberg return tunnel; 4760bd680cdSMika Westerberg } 4770bd680cdSMika Westerberg } 4780bd680cdSMika Westerberg 4790bd680cdSMika Westerberg return NULL; 4800bd680cdSMika Westerberg } 4810bd680cdSMika Westerberg 4820bd680cdSMika Westerberg static struct tb_tunnel *tb_find_first_usb3_tunnel(struct tb *tb, 4830bd680cdSMika Westerberg struct tb_port *src_port, 4840bd680cdSMika Westerberg struct tb_port *dst_port) 4850bd680cdSMika Westerberg { 4860bd680cdSMika Westerberg struct tb_port *port, *usb3_down; 4870bd680cdSMika Westerberg struct tb_switch *sw; 4880bd680cdSMika Westerberg 4890bd680cdSMika Westerberg /* Pick the router that is deepest in the topology */ 4900bd680cdSMika Westerberg if (dst_port->sw->config.depth > src_port->sw->config.depth) 4910bd680cdSMika Westerberg sw = dst_port->sw; 4920bd680cdSMika Westerberg else 4930bd680cdSMika Westerberg sw = src_port->sw; 4940bd680cdSMika Westerberg 4950bd680cdSMika Westerberg /* Can't be the host router */ 4960bd680cdSMika Westerberg if (sw == tb->root_switch) 4970bd680cdSMika Westerberg return NULL; 4980bd680cdSMika Westerberg 4990bd680cdSMika Westerberg /* Find the downstream USB4 port that leads to this router */ 5000bd680cdSMika Westerberg port = tb_port_at(tb_route(sw), tb->root_switch); 5010bd680cdSMika Westerberg /* Find the corresponding host router USB3 downstream port */ 5020bd680cdSMika Westerberg usb3_down = usb4_switch_map_usb3_down(tb->root_switch, port); 5030bd680cdSMika Westerberg if (!usb3_down) 5040bd680cdSMika Westerberg return NULL; 5050bd680cdSMika Westerberg 5060bd680cdSMika Westerberg return tb_find_tunnel(tb, TB_TUNNEL_USB3, usb3_down, NULL); 5070bd680cdSMika Westerberg } 5080bd680cdSMika Westerberg 5090bd680cdSMika Westerberg static int tb_available_bandwidth(struct tb *tb, struct tb_port *src_port, 5100bd680cdSMika Westerberg struct tb_port *dst_port, int *available_up, int *available_down) 5110bd680cdSMika Westerberg { 5120bd680cdSMika Westerberg int usb3_consumed_up, usb3_consumed_down, ret; 5130bd680cdSMika Westerberg struct tb_cm *tcm = tb_priv(tb); 5140bd680cdSMika Westerberg struct tb_tunnel *tunnel; 5150bd680cdSMika Westerberg struct tb_port *port; 5160bd680cdSMika Westerberg 5172426fdf7SMika Westerberg tb_dbg(tb, "calculating available bandwidth between %llx:%u <-> %llx:%u\n", 5182426fdf7SMika Westerberg tb_route(src_port->sw), src_port->port, tb_route(dst_port->sw), 5192426fdf7SMika Westerberg dst_port->port); 5200bd680cdSMika Westerberg 5210bd680cdSMika Westerberg tunnel = tb_find_first_usb3_tunnel(tb, src_port, dst_port); 5226ce35635SMika Westerberg if (tunnel && tunnel->src_port != src_port && 5236ce35635SMika Westerberg tunnel->dst_port != dst_port) { 5240bd680cdSMika Westerberg ret = tb_tunnel_consumed_bandwidth(tunnel, &usb3_consumed_up, 5250bd680cdSMika Westerberg &usb3_consumed_down); 5260bd680cdSMika Westerberg if (ret) 5270bd680cdSMika Westerberg return ret; 5280bd680cdSMika Westerberg } else { 5290bd680cdSMika Westerberg usb3_consumed_up = 0; 5300bd680cdSMika Westerberg usb3_consumed_down = 0; 5310bd680cdSMika Westerberg } 5320bd680cdSMika Westerberg 5330bd680cdSMika Westerberg *available_up = *available_down = 40000; 5340bd680cdSMika Westerberg 5350bd680cdSMika Westerberg /* Find the minimum available bandwidth over all links */ 5360bd680cdSMika Westerberg tb_for_each_port_on_path(src_port, dst_port, port) { 5370bd680cdSMika Westerberg int link_speed, link_width, up_bw, down_bw; 5380bd680cdSMika Westerberg 5390bd680cdSMika Westerberg if (!tb_port_is_null(port)) 5400bd680cdSMika Westerberg continue; 5410bd680cdSMika Westerberg 5420bd680cdSMika Westerberg if (tb_is_upstream_port(port)) { 5430bd680cdSMika Westerberg link_speed = port->sw->link_speed; 5440bd680cdSMika Westerberg } else { 5450bd680cdSMika Westerberg link_speed = tb_port_get_link_speed(port); 5460bd680cdSMika Westerberg if (link_speed < 0) 5470bd680cdSMika Westerberg return link_speed; 5480bd680cdSMika Westerberg } 5490bd680cdSMika Westerberg 5500bd680cdSMika Westerberg link_width = port->bonded ? 2 : 1; 5510bd680cdSMika Westerberg 5520bd680cdSMika Westerberg up_bw = link_speed * link_width * 1000; /* Mb/s */ 5530bd680cdSMika Westerberg /* Leave 10% guard band */ 5540bd680cdSMika Westerberg up_bw -= up_bw / 10; 5550bd680cdSMika Westerberg down_bw = up_bw; 5560bd680cdSMika Westerberg 5572426fdf7SMika Westerberg tb_port_dbg(port, "link total bandwidth %d/%d Mb/s\n", up_bw, 5582426fdf7SMika Westerberg down_bw); 5590bd680cdSMika Westerberg 5600bd680cdSMika Westerberg /* 5610bd680cdSMika Westerberg * Find all DP tunnels that cross the port and reduce 5620bd680cdSMika Westerberg * their consumed bandwidth from the available. 5630bd680cdSMika Westerberg */ 5640bd680cdSMika Westerberg list_for_each_entry(tunnel, &tcm->tunnel_list, list) { 5650bd680cdSMika Westerberg int dp_consumed_up, dp_consumed_down; 5660bd680cdSMika Westerberg 5676ce35635SMika Westerberg if (tb_tunnel_is_invalid(tunnel)) 5686ce35635SMika Westerberg continue; 5696ce35635SMika Westerberg 5700bd680cdSMika Westerberg if (!tb_tunnel_is_dp(tunnel)) 5710bd680cdSMika Westerberg continue; 5720bd680cdSMika Westerberg 5730bd680cdSMika Westerberg if (!tb_tunnel_port_on_path(tunnel, port)) 5740bd680cdSMika Westerberg continue; 5750bd680cdSMika Westerberg 5766ce35635SMika Westerberg /* 5776ce35635SMika Westerberg * Ignore the DP tunnel between src_port and 5786ce35635SMika Westerberg * dst_port because it is the same tunnel and we 5796ce35635SMika Westerberg * may be re-calculating estimated bandwidth. 5806ce35635SMika Westerberg */ 5816ce35635SMika Westerberg if (tunnel->src_port == src_port && 5826ce35635SMika Westerberg tunnel->dst_port == dst_port) 5836ce35635SMika Westerberg continue; 5846ce35635SMika Westerberg 5850bd680cdSMika Westerberg ret = tb_tunnel_consumed_bandwidth(tunnel, 5860bd680cdSMika Westerberg &dp_consumed_up, 5870bd680cdSMika Westerberg &dp_consumed_down); 5880bd680cdSMika Westerberg if (ret) 5890bd680cdSMika Westerberg return ret; 5900bd680cdSMika Westerberg 5910bd680cdSMika Westerberg up_bw -= dp_consumed_up; 5920bd680cdSMika Westerberg down_bw -= dp_consumed_down; 5930bd680cdSMika Westerberg } 5940bd680cdSMika Westerberg 5950bd680cdSMika Westerberg /* 5960bd680cdSMika Westerberg * If USB3 is tunneled from the host router down to the 5970bd680cdSMika Westerberg * branch leading to port we need to take USB3 consumed 5980bd680cdSMika Westerberg * bandwidth into account regardless whether it actually 5990bd680cdSMika Westerberg * crosses the port. 6000bd680cdSMika Westerberg */ 6010bd680cdSMika Westerberg up_bw -= usb3_consumed_up; 6020bd680cdSMika Westerberg down_bw -= usb3_consumed_down; 6030bd680cdSMika Westerberg 6040bd680cdSMika Westerberg if (up_bw < *available_up) 6050bd680cdSMika Westerberg *available_up = up_bw; 6060bd680cdSMika Westerberg if (down_bw < *available_down) 6070bd680cdSMika Westerberg *available_down = down_bw; 6080bd680cdSMika Westerberg } 6090bd680cdSMika Westerberg 6100bd680cdSMika Westerberg if (*available_up < 0) 6110bd680cdSMika Westerberg *available_up = 0; 6120bd680cdSMika Westerberg if (*available_down < 0) 6130bd680cdSMika Westerberg *available_down = 0; 6140bd680cdSMika Westerberg 6150bd680cdSMika Westerberg return 0; 6160bd680cdSMika Westerberg } 6170bd680cdSMika Westerberg 6180bd680cdSMika Westerberg static int tb_release_unused_usb3_bandwidth(struct tb *tb, 6190bd680cdSMika Westerberg struct tb_port *src_port, 6200bd680cdSMika Westerberg struct tb_port *dst_port) 6210bd680cdSMika Westerberg { 6220bd680cdSMika Westerberg struct tb_tunnel *tunnel; 6230bd680cdSMika Westerberg 6240bd680cdSMika Westerberg tunnel = tb_find_first_usb3_tunnel(tb, src_port, dst_port); 6250bd680cdSMika Westerberg return tunnel ? tb_tunnel_release_unused_bandwidth(tunnel) : 0; 6260bd680cdSMika Westerberg } 6270bd680cdSMika Westerberg 6280bd680cdSMika Westerberg static void tb_reclaim_usb3_bandwidth(struct tb *tb, struct tb_port *src_port, 6290bd680cdSMika Westerberg struct tb_port *dst_port) 6300bd680cdSMika Westerberg { 6310bd680cdSMika Westerberg int ret, available_up, available_down; 6320bd680cdSMika Westerberg struct tb_tunnel *tunnel; 6330bd680cdSMika Westerberg 6340bd680cdSMika Westerberg tunnel = tb_find_first_usb3_tunnel(tb, src_port, dst_port); 6350bd680cdSMika Westerberg if (!tunnel) 6360bd680cdSMika Westerberg return; 6370bd680cdSMika Westerberg 6380bd680cdSMika Westerberg tb_dbg(tb, "reclaiming unused bandwidth for USB3\n"); 6390bd680cdSMika Westerberg 6400bd680cdSMika Westerberg /* 6410bd680cdSMika Westerberg * Calculate available bandwidth for the first hop USB3 tunnel. 6420bd680cdSMika Westerberg * That determines the whole USB3 bandwidth for this branch. 6430bd680cdSMika Westerberg */ 6440bd680cdSMika Westerberg ret = tb_available_bandwidth(tb, tunnel->src_port, tunnel->dst_port, 6450bd680cdSMika Westerberg &available_up, &available_down); 6460bd680cdSMika Westerberg if (ret) { 6470bd680cdSMika Westerberg tb_warn(tb, "failed to calculate available bandwidth\n"); 6480bd680cdSMika Westerberg return; 6490bd680cdSMika Westerberg } 6500bd680cdSMika Westerberg 6510bd680cdSMika Westerberg tb_dbg(tb, "available bandwidth for USB3 %d/%d Mb/s\n", 6520bd680cdSMika Westerberg available_up, available_down); 6530bd680cdSMika Westerberg 6540bd680cdSMika Westerberg tb_tunnel_reclaim_available_bandwidth(tunnel, &available_up, &available_down); 6550bd680cdSMika Westerberg } 6560bd680cdSMika Westerberg 657e6f81858SRajmohan Mani static int tb_tunnel_usb3(struct tb *tb, struct tb_switch *sw) 658e6f81858SRajmohan Mani { 659e6f81858SRajmohan Mani struct tb_switch *parent = tb_switch_parent(sw); 6600bd680cdSMika Westerberg int ret, available_up, available_down; 661e6f81858SRajmohan Mani struct tb_port *up, *down, *port; 662e6f81858SRajmohan Mani struct tb_cm *tcm = tb_priv(tb); 663e6f81858SRajmohan Mani struct tb_tunnel *tunnel; 664e6f81858SRajmohan Mani 665c6da62a2SMika Westerberg if (!tb_acpi_may_tunnel_usb3()) { 666c6da62a2SMika Westerberg tb_dbg(tb, "USB3 tunneling disabled, not creating tunnel\n"); 667c6da62a2SMika Westerberg return 0; 668c6da62a2SMika Westerberg } 669c6da62a2SMika Westerberg 670e6f81858SRajmohan Mani up = tb_switch_find_port(sw, TB_TYPE_USB3_UP); 671e6f81858SRajmohan Mani if (!up) 672e6f81858SRajmohan Mani return 0; 673e6f81858SRajmohan Mani 674bbcf40b3SMika Westerberg if (!sw->link_usb4) 675bbcf40b3SMika Westerberg return 0; 676bbcf40b3SMika Westerberg 677e6f81858SRajmohan Mani /* 678e6f81858SRajmohan Mani * Look up available down port. Since we are chaining it should 679e6f81858SRajmohan Mani * be found right above this switch. 680e6f81858SRajmohan Mani */ 6817ce54221SGil Fine port = tb_switch_downstream_port(sw); 682e6f81858SRajmohan Mani down = tb_find_usb3_down(parent, port); 683e6f81858SRajmohan Mani if (!down) 684e6f81858SRajmohan Mani return 0; 685e6f81858SRajmohan Mani 686e6f81858SRajmohan Mani if (tb_route(parent)) { 687e6f81858SRajmohan Mani struct tb_port *parent_up; 688e6f81858SRajmohan Mani /* 689e6f81858SRajmohan Mani * Check first that the parent switch has its upstream USB3 690e6f81858SRajmohan Mani * port enabled. Otherwise the chain is not complete and 691e6f81858SRajmohan Mani * there is no point setting up a new tunnel. 692e6f81858SRajmohan Mani */ 693e6f81858SRajmohan Mani parent_up = tb_switch_find_port(parent, TB_TYPE_USB3_UP); 694e6f81858SRajmohan Mani if (!parent_up || !tb_port_is_enabled(parent_up)) 695e6f81858SRajmohan Mani return 0; 6960bd680cdSMika Westerberg 6970bd680cdSMika Westerberg /* Make all unused bandwidth available for the new tunnel */ 6980bd680cdSMika Westerberg ret = tb_release_unused_usb3_bandwidth(tb, down, up); 6990bd680cdSMika Westerberg if (ret) 7000bd680cdSMika Westerberg return ret; 701e6f81858SRajmohan Mani } 702e6f81858SRajmohan Mani 7030bd680cdSMika Westerberg ret = tb_available_bandwidth(tb, down, up, &available_up, 7040bd680cdSMika Westerberg &available_down); 7050bd680cdSMika Westerberg if (ret) 7060bd680cdSMika Westerberg goto err_reclaim; 7070bd680cdSMika Westerberg 7080bd680cdSMika Westerberg tb_port_dbg(up, "available bandwidth for new USB3 tunnel %d/%d Mb/s\n", 7090bd680cdSMika Westerberg available_up, available_down); 7100bd680cdSMika Westerberg 7110bd680cdSMika Westerberg tunnel = tb_tunnel_alloc_usb3(tb, up, down, available_up, 7120bd680cdSMika Westerberg available_down); 7130bd680cdSMika Westerberg if (!tunnel) { 7140bd680cdSMika Westerberg ret = -ENOMEM; 7150bd680cdSMika Westerberg goto err_reclaim; 7160bd680cdSMika Westerberg } 717e6f81858SRajmohan Mani 718e6f81858SRajmohan Mani if (tb_tunnel_activate(tunnel)) { 719e6f81858SRajmohan Mani tb_port_info(up, 720e6f81858SRajmohan Mani "USB3 tunnel activation failed, aborting\n"); 7210bd680cdSMika Westerberg ret = -EIO; 7220bd680cdSMika Westerberg goto err_free; 723e6f81858SRajmohan Mani } 724e6f81858SRajmohan Mani 725e6f81858SRajmohan Mani list_add_tail(&tunnel->list, &tcm->tunnel_list); 7260bd680cdSMika Westerberg if (tb_route(parent)) 7270bd680cdSMika Westerberg tb_reclaim_usb3_bandwidth(tb, down, up); 7280bd680cdSMika Westerberg 729e6f81858SRajmohan Mani return 0; 7300bd680cdSMika Westerberg 7310bd680cdSMika Westerberg err_free: 7320bd680cdSMika Westerberg tb_tunnel_free(tunnel); 7330bd680cdSMika Westerberg err_reclaim: 7340bd680cdSMika Westerberg if (tb_route(parent)) 7350bd680cdSMika Westerberg tb_reclaim_usb3_bandwidth(tb, down, up); 7360bd680cdSMika Westerberg 7370bd680cdSMika Westerberg return ret; 738e6f81858SRajmohan Mani } 739e6f81858SRajmohan Mani 740e6f81858SRajmohan Mani static int tb_create_usb3_tunnels(struct tb_switch *sw) 741e6f81858SRajmohan Mani { 742e6f81858SRajmohan Mani struct tb_port *port; 743e6f81858SRajmohan Mani int ret; 744e6f81858SRajmohan Mani 745c6da62a2SMika Westerberg if (!tb_acpi_may_tunnel_usb3()) 746c6da62a2SMika Westerberg return 0; 747c6da62a2SMika Westerberg 748e6f81858SRajmohan Mani if (tb_route(sw)) { 749e6f81858SRajmohan Mani ret = tb_tunnel_usb3(sw->tb, sw); 750e6f81858SRajmohan Mani if (ret) 751e6f81858SRajmohan Mani return ret; 752e6f81858SRajmohan Mani } 753e6f81858SRajmohan Mani 754e6f81858SRajmohan Mani tb_switch_for_each_port(sw, port) { 755e6f81858SRajmohan Mani if (!tb_port_has_remote(port)) 756e6f81858SRajmohan Mani continue; 757e6f81858SRajmohan Mani ret = tb_create_usb3_tunnels(port->remote->sw); 758e6f81858SRajmohan Mani if (ret) 759e6f81858SRajmohan Mani return ret; 760e6f81858SRajmohan Mani } 761e6f81858SRajmohan Mani 762e6f81858SRajmohan Mani return 0; 763e6f81858SRajmohan Mani } 764e6f81858SRajmohan Mani 7659da672a4SAndreas Noever static void tb_scan_port(struct tb_port *port); 7669da672a4SAndreas Noever 767877e50b3SLee Jones /* 7689da672a4SAndreas Noever * tb_scan_switch() - scan for and initialize downstream switches 7699da672a4SAndreas Noever */ 7709da672a4SAndreas Noever static void tb_scan_switch(struct tb_switch *sw) 7719da672a4SAndreas Noever { 772b433d010SMika Westerberg struct tb_port *port; 773b433d010SMika Westerberg 7746ac6faeeSMika Westerberg pm_runtime_get_sync(&sw->dev); 7756ac6faeeSMika Westerberg 776b433d010SMika Westerberg tb_switch_for_each_port(sw, port) 777b433d010SMika Westerberg tb_scan_port(port); 7786ac6faeeSMika Westerberg 7796ac6faeeSMika Westerberg pm_runtime_mark_last_busy(&sw->dev); 7806ac6faeeSMika Westerberg pm_runtime_put_autosuspend(&sw->dev); 7819da672a4SAndreas Noever } 7829da672a4SAndreas Noever 783877e50b3SLee Jones /* 7849da672a4SAndreas Noever * tb_scan_port() - check for and initialize switches below port 7859da672a4SAndreas Noever */ 7869da672a4SAndreas Noever static void tb_scan_port(struct tb_port *port) 7879da672a4SAndreas Noever { 78899cabbb0SMika Westerberg struct tb_cm *tcm = tb_priv(port->sw->tb); 789dfe40ca4SMika Westerberg struct tb_port *upstream_port; 7903fe95742SMika Westerberg bool discovery = false; 7919da672a4SAndreas Noever struct tb_switch *sw; 792dfe40ca4SMika Westerberg 7939da672a4SAndreas Noever if (tb_is_upstream_port(port)) 7949da672a4SAndreas Noever return; 7954f807e47SMika Westerberg 7964f807e47SMika Westerberg if (tb_port_is_dpout(port) && tb_dp_port_hpd_is_active(port) == 1 && 7974f807e47SMika Westerberg !tb_dp_port_is_enabled(port)) { 7984f807e47SMika Westerberg tb_port_dbg(port, "DP adapter HPD set, queuing hotplug\n"); 7994f807e47SMika Westerberg tb_queue_hotplug(port->sw->tb, tb_route(port->sw), port->port, 8004f807e47SMika Westerberg false); 8014f807e47SMika Westerberg return; 8024f807e47SMika Westerberg } 8034f807e47SMika Westerberg 8049da672a4SAndreas Noever if (port->config.type != TB_TYPE_PORT) 8059da672a4SAndreas Noever return; 806343fcb8cSAndreas Noever if (port->dual_link_port && port->link_nr) 807343fcb8cSAndreas Noever return; /* 808343fcb8cSAndreas Noever * Downstream switch is reachable through two ports. 809343fcb8cSAndreas Noever * Only scan on the primary port (link_nr == 0). 810343fcb8cSAndreas Noever */ 81123257cfcSMika Westerberg 81223257cfcSMika Westerberg if (port->usb4) 81323257cfcSMika Westerberg pm_runtime_get_sync(&port->usb4->dev); 81423257cfcSMika Westerberg 8159da672a4SAndreas Noever if (tb_wait_for_port(port, false) <= 0) 81623257cfcSMika Westerberg goto out_rpm_put; 8179da672a4SAndreas Noever if (port->remote) { 8187ea4cd6bSMika Westerberg tb_port_dbg(port, "port already has a remote\n"); 81923257cfcSMika Westerberg goto out_rpm_put; 8209da672a4SAndreas Noever } 821dacb1287SKranthi Kuntala 8223fb10ea4SRajmohan Mani tb_retimer_scan(port, true); 823dacb1287SKranthi Kuntala 824bfe778acSMika Westerberg sw = tb_switch_alloc(port->sw->tb, &port->sw->dev, 825bfe778acSMika Westerberg tb_downstream_route(port)); 8267ea4cd6bSMika Westerberg if (IS_ERR(sw)) { 8277ea4cd6bSMika Westerberg /* 8287ea4cd6bSMika Westerberg * If there is an error accessing the connected switch 8297ea4cd6bSMika Westerberg * it may be connected to another domain. Also we allow 8307ea4cd6bSMika Westerberg * the other domain to be connected to a max depth switch. 8317ea4cd6bSMika Westerberg */ 8327ea4cd6bSMika Westerberg if (PTR_ERR(sw) == -EIO || PTR_ERR(sw) == -EADDRNOTAVAIL) 8337ea4cd6bSMika Westerberg tb_scan_xdomain(port); 83423257cfcSMika Westerberg goto out_rpm_put; 8357ea4cd6bSMika Westerberg } 836bfe778acSMika Westerberg 837bfe778acSMika Westerberg if (tb_switch_configure(sw)) { 838bfe778acSMika Westerberg tb_switch_put(sw); 83923257cfcSMika Westerberg goto out_rpm_put; 840bfe778acSMika Westerberg } 841bfe778acSMika Westerberg 84299cabbb0SMika Westerberg /* 8437ea4cd6bSMika Westerberg * If there was previously another domain connected remove it 8447ea4cd6bSMika Westerberg * first. 8457ea4cd6bSMika Westerberg */ 8467ea4cd6bSMika Westerberg if (port->xdomain) { 8477ea4cd6bSMika Westerberg tb_xdomain_remove(port->xdomain); 848284652a4SMika Westerberg tb_port_unconfigure_xdomain(port); 8497ea4cd6bSMika Westerberg port->xdomain = NULL; 8507ea4cd6bSMika Westerberg } 8517ea4cd6bSMika Westerberg 8527ea4cd6bSMika Westerberg /* 85399cabbb0SMika Westerberg * Do not send uevents until we have discovered all existing 85499cabbb0SMika Westerberg * tunnels and know which switches were authorized already by 85599cabbb0SMika Westerberg * the boot firmware. 85699cabbb0SMika Westerberg */ 8573fe95742SMika Westerberg if (!tcm->hotplug_active) { 85899cabbb0SMika Westerberg dev_set_uevent_suppress(&sw->dev, true); 8593fe95742SMika Westerberg discovery = true; 8603fe95742SMika Westerberg } 861f67cf491SMika Westerberg 8626ac6faeeSMika Westerberg /* 8636ac6faeeSMika Westerberg * At the moment Thunderbolt 2 and beyond (devices with LC) we 8646ac6faeeSMika Westerberg * can support runtime PM. 8656ac6faeeSMika Westerberg */ 8666ac6faeeSMika Westerberg sw->rpm = sw->generation > 1; 8676ac6faeeSMika Westerberg 868bfe778acSMika Westerberg if (tb_switch_add(sw)) { 869bfe778acSMika Westerberg tb_switch_put(sw); 87023257cfcSMika Westerberg goto out_rpm_put; 871bfe778acSMika Westerberg } 872bfe778acSMika Westerberg 873dfe40ca4SMika Westerberg /* Link the switches using both links if available */ 874dfe40ca4SMika Westerberg upstream_port = tb_upstream_port(sw); 875dfe40ca4SMika Westerberg port->remote = upstream_port; 876dfe40ca4SMika Westerberg upstream_port->remote = port; 877dfe40ca4SMika Westerberg if (port->dual_link_port && upstream_port->dual_link_port) { 878dfe40ca4SMika Westerberg port->dual_link_port->remote = upstream_port->dual_link_port; 879dfe40ca4SMika Westerberg upstream_port->dual_link_port->remote = port->dual_link_port; 880dfe40ca4SMika Westerberg } 881dfe40ca4SMika Westerberg 88291c0c120SMika Westerberg /* Enable lane bonding if supported */ 8832ca3263aSMika Westerberg tb_switch_lane_bonding_enable(sw); 884de462039SMika Westerberg /* Set the link configured */ 885de462039SMika Westerberg tb_switch_configure_link(sw); 886b017a46dSGil Fine /* 887b017a46dSGil Fine * CL0s and CL1 are enabled and supported together. 888b017a46dSGil Fine * Silently ignore CLx enabling in case CLx is not supported. 889b017a46dSGil Fine */ 8901a9b6cb8SMika Westerberg if (discovery) 8913fe95742SMika Westerberg tb_sw_dbg(sw, "discovery, not touching CL states\n"); 8921a9b6cb8SMika Westerberg else if (tb_enable_clx(sw)) 8931a9b6cb8SMika Westerberg tb_sw_warn(sw, "failed to enable CL states\n"); 8948a90e4faSGil Fine 895cf29b9afSRajmohan Mani if (tb_enable_tmu(sw)) 896cf29b9afSRajmohan Mani tb_sw_warn(sw, "failed to enable TMU\n"); 897cf29b9afSRajmohan Mani 898dacb1287SKranthi Kuntala /* Scan upstream retimers */ 8993fb10ea4SRajmohan Mani tb_retimer_scan(upstream_port, true); 900dacb1287SKranthi Kuntala 901e6f81858SRajmohan Mani /* 902e6f81858SRajmohan Mani * Create USB 3.x tunnels only when the switch is plugged to the 903e6f81858SRajmohan Mani * domain. This is because we scan the domain also during discovery 904e6f81858SRajmohan Mani * and want to discover existing USB 3.x tunnels before we create 905e6f81858SRajmohan Mani * any new. 906e6f81858SRajmohan Mani */ 907e6f81858SRajmohan Mani if (tcm->hotplug_active && tb_tunnel_usb3(sw->tb, sw)) 908e6f81858SRajmohan Mani tb_sw_warn(sw, "USB3 tunnel creation failed\n"); 909e6f81858SRajmohan Mani 910e876f34aSMika Westerberg tb_add_dp_resources(sw); 9119da672a4SAndreas Noever tb_scan_switch(sw); 91223257cfcSMika Westerberg 91323257cfcSMika Westerberg out_rpm_put: 91423257cfcSMika Westerberg if (port->usb4) { 91523257cfcSMika Westerberg pm_runtime_mark_last_busy(&port->usb4->dev); 91623257cfcSMika Westerberg pm_runtime_put_autosuspend(&port->usb4->dev); 91723257cfcSMika Westerberg } 9189da672a4SAndreas Noever } 9199da672a4SAndreas Noever 9208afe909bSMika Westerberg static void tb_deactivate_and_free_tunnel(struct tb_tunnel *tunnel) 9218afe909bSMika Westerberg { 9220bd680cdSMika Westerberg struct tb_port *src_port, *dst_port; 9230bd680cdSMika Westerberg struct tb *tb; 9240bd680cdSMika Westerberg 9258afe909bSMika Westerberg if (!tunnel) 9268afe909bSMika Westerberg return; 9278afe909bSMika Westerberg 9288afe909bSMika Westerberg tb_tunnel_deactivate(tunnel); 9298afe909bSMika Westerberg list_del(&tunnel->list); 9308afe909bSMika Westerberg 9310bd680cdSMika Westerberg tb = tunnel->tb; 9320bd680cdSMika Westerberg src_port = tunnel->src_port; 9330bd680cdSMika Westerberg dst_port = tunnel->dst_port; 9348afe909bSMika Westerberg 9350bd680cdSMika Westerberg switch (tunnel->type) { 9360bd680cdSMika Westerberg case TB_TUNNEL_DP: 9376ce35635SMika Westerberg tb_detach_bandwidth_group(src_port); 9380bd680cdSMika Westerberg /* 9390bd680cdSMika Westerberg * In case of DP tunnel make sure the DP IN resource is 9400bd680cdSMika Westerberg * deallocated properly. 9410bd680cdSMika Westerberg */ 9420bd680cdSMika Westerberg tb_switch_dealloc_dp_resource(src_port->sw, src_port); 9436ac6faeeSMika Westerberg /* Now we can allow the domain to runtime suspend again */ 9446ac6faeeSMika Westerberg pm_runtime_mark_last_busy(&dst_port->sw->dev); 9456ac6faeeSMika Westerberg pm_runtime_put_autosuspend(&dst_port->sw->dev); 9466ac6faeeSMika Westerberg pm_runtime_mark_last_busy(&src_port->sw->dev); 9476ac6faeeSMika Westerberg pm_runtime_put_autosuspend(&src_port->sw->dev); 9480bd680cdSMika Westerberg fallthrough; 9490bd680cdSMika Westerberg 9500bd680cdSMika Westerberg case TB_TUNNEL_USB3: 9510bd680cdSMika Westerberg tb_reclaim_usb3_bandwidth(tb, src_port, dst_port); 9520bd680cdSMika Westerberg break; 9530bd680cdSMika Westerberg 9540bd680cdSMika Westerberg default: 9550bd680cdSMika Westerberg /* 9560bd680cdSMika Westerberg * PCIe and DMA tunnels do not consume guaranteed 9570bd680cdSMika Westerberg * bandwidth. 9580bd680cdSMika Westerberg */ 9590bd680cdSMika Westerberg break; 9608afe909bSMika Westerberg } 9618afe909bSMika Westerberg 9628afe909bSMika Westerberg tb_tunnel_free(tunnel); 9634f807e47SMika Westerberg } 9644f807e47SMika Westerberg 965877e50b3SLee Jones /* 9663364f0c1SAndreas Noever * tb_free_invalid_tunnels() - destroy tunnels of devices that have gone away 9673364f0c1SAndreas Noever */ 9683364f0c1SAndreas Noever static void tb_free_invalid_tunnels(struct tb *tb) 9693364f0c1SAndreas Noever { 9709d3cce0bSMika Westerberg struct tb_cm *tcm = tb_priv(tb); 97193f36adeSMika Westerberg struct tb_tunnel *tunnel; 97293f36adeSMika Westerberg struct tb_tunnel *n; 9739d3cce0bSMika Westerberg 9749d3cce0bSMika Westerberg list_for_each_entry_safe(tunnel, n, &tcm->tunnel_list, list) { 9758afe909bSMika Westerberg if (tb_tunnel_is_invalid(tunnel)) 9768afe909bSMika Westerberg tb_deactivate_and_free_tunnel(tunnel); 9773364f0c1SAndreas Noever } 9783364f0c1SAndreas Noever } 9793364f0c1SAndreas Noever 980877e50b3SLee Jones /* 98123dd5bb4SAndreas Noever * tb_free_unplugged_children() - traverse hierarchy and free unplugged switches 98223dd5bb4SAndreas Noever */ 98323dd5bb4SAndreas Noever static void tb_free_unplugged_children(struct tb_switch *sw) 98423dd5bb4SAndreas Noever { 985b433d010SMika Westerberg struct tb_port *port; 986dfe40ca4SMika Westerberg 987b433d010SMika Westerberg tb_switch_for_each_port(sw, port) { 988dfe40ca4SMika Westerberg if (!tb_port_has_remote(port)) 98923dd5bb4SAndreas Noever continue; 990dfe40ca4SMika Westerberg 99123dd5bb4SAndreas Noever if (port->remote->sw->is_unplugged) { 992dacb1287SKranthi Kuntala tb_retimer_remove_all(port); 9938afe909bSMika Westerberg tb_remove_dp_resources(port->remote->sw); 994de462039SMika Westerberg tb_switch_unconfigure_link(port->remote->sw); 99591c0c120SMika Westerberg tb_switch_lane_bonding_disable(port->remote->sw); 996bfe778acSMika Westerberg tb_switch_remove(port->remote->sw); 99723dd5bb4SAndreas Noever port->remote = NULL; 998dfe40ca4SMika Westerberg if (port->dual_link_port) 999dfe40ca4SMika Westerberg port->dual_link_port->remote = NULL; 100023dd5bb4SAndreas Noever } else { 100123dd5bb4SAndreas Noever tb_free_unplugged_children(port->remote->sw); 100223dd5bb4SAndreas Noever } 100323dd5bb4SAndreas Noever } 100423dd5bb4SAndreas Noever } 100523dd5bb4SAndreas Noever 100699cabbb0SMika Westerberg static struct tb_port *tb_find_pcie_down(struct tb_switch *sw, 100799cabbb0SMika Westerberg const struct tb_port *port) 10083364f0c1SAndreas Noever { 1009b0407983SMika Westerberg struct tb_port *down = NULL; 1010b0407983SMika Westerberg 101199cabbb0SMika Westerberg /* 101299cabbb0SMika Westerberg * To keep plugging devices consistently in the same PCIe 1013b0407983SMika Westerberg * hierarchy, do mapping here for switch downstream PCIe ports. 101499cabbb0SMika Westerberg */ 1015b0407983SMika Westerberg if (tb_switch_is_usb4(sw)) { 1016b0407983SMika Westerberg down = usb4_switch_map_pcie_down(sw, port); 1017b0407983SMika Westerberg } else if (!tb_route(sw)) { 101899cabbb0SMika Westerberg int phy_port = tb_phy_port_from_link(port->port); 101999cabbb0SMika Westerberg int index; 102099cabbb0SMika Westerberg 102199cabbb0SMika Westerberg /* 102299cabbb0SMika Westerberg * Hard-coded Thunderbolt port to PCIe down port mapping 102399cabbb0SMika Westerberg * per controller. 102499cabbb0SMika Westerberg */ 10257bffd97eSMika Westerberg if (tb_switch_is_cactus_ridge(sw) || 10267bffd97eSMika Westerberg tb_switch_is_alpine_ridge(sw)) 102799cabbb0SMika Westerberg index = !phy_port ? 6 : 7; 102817a8f815SMika Westerberg else if (tb_switch_is_falcon_ridge(sw)) 102999cabbb0SMika Westerberg index = !phy_port ? 6 : 8; 10307bffd97eSMika Westerberg else if (tb_switch_is_titan_ridge(sw)) 10317bffd97eSMika Westerberg index = !phy_port ? 8 : 9; 103299cabbb0SMika Westerberg else 103399cabbb0SMika Westerberg goto out; 103499cabbb0SMika Westerberg 103599cabbb0SMika Westerberg /* Validate the hard-coding */ 103699cabbb0SMika Westerberg if (WARN_ON(index > sw->config.max_port_number)) 103799cabbb0SMika Westerberg goto out; 1038b0407983SMika Westerberg 1039b0407983SMika Westerberg down = &sw->ports[index]; 1040b0407983SMika Westerberg } 1041b0407983SMika Westerberg 1042b0407983SMika Westerberg if (down) { 1043b0407983SMika Westerberg if (WARN_ON(!tb_port_is_pcie_down(down))) 104499cabbb0SMika Westerberg goto out; 10459cac51a0SMika Westerberg if (tb_pci_port_is_enabled(down)) 104699cabbb0SMika Westerberg goto out; 104799cabbb0SMika Westerberg 1048b0407983SMika Westerberg return down; 104999cabbb0SMika Westerberg } 105099cabbb0SMika Westerberg 105199cabbb0SMika Westerberg out: 1052e78db6f0SMika Westerberg return tb_find_unused_port(sw, TB_TYPE_PCIE_DOWN); 105399cabbb0SMika Westerberg } 105499cabbb0SMika Westerberg 10556ce35635SMika Westerberg static void 10566ce35635SMika Westerberg tb_recalc_estimated_bandwidth_for_group(struct tb_bandwidth_group *group) 10576ce35635SMika Westerberg { 10586ce35635SMika Westerberg struct tb_tunnel *first_tunnel; 10596ce35635SMika Westerberg struct tb *tb = group->tb; 10606ce35635SMika Westerberg struct tb_port *in; 10616ce35635SMika Westerberg int ret; 10626ce35635SMika Westerberg 10636ce35635SMika Westerberg tb_dbg(tb, "re-calculating bandwidth estimation for group %u\n", 10646ce35635SMika Westerberg group->index); 10656ce35635SMika Westerberg 10666ce35635SMika Westerberg first_tunnel = NULL; 10676ce35635SMika Westerberg list_for_each_entry(in, &group->ports, group_list) { 10686ce35635SMika Westerberg int estimated_bw, estimated_up, estimated_down; 10696ce35635SMika Westerberg struct tb_tunnel *tunnel; 10706ce35635SMika Westerberg struct tb_port *out; 10716ce35635SMika Westerberg 10726ce35635SMika Westerberg if (!usb4_dp_port_bw_mode_enabled(in)) 10736ce35635SMika Westerberg continue; 10746ce35635SMika Westerberg 10756ce35635SMika Westerberg tunnel = tb_find_tunnel(tb, TB_TUNNEL_DP, in, NULL); 10766ce35635SMika Westerberg if (WARN_ON(!tunnel)) 10776ce35635SMika Westerberg break; 10786ce35635SMika Westerberg 10796ce35635SMika Westerberg if (!first_tunnel) { 10806ce35635SMika Westerberg /* 10816ce35635SMika Westerberg * Since USB3 bandwidth is shared by all DP 10826ce35635SMika Westerberg * tunnels under the host router USB4 port, even 10836ce35635SMika Westerberg * if they do not begin from the host router, we 10846ce35635SMika Westerberg * can release USB3 bandwidth just once and not 10856ce35635SMika Westerberg * for each tunnel separately. 10866ce35635SMika Westerberg */ 10876ce35635SMika Westerberg first_tunnel = tunnel; 10886ce35635SMika Westerberg ret = tb_release_unused_usb3_bandwidth(tb, 10896ce35635SMika Westerberg first_tunnel->src_port, first_tunnel->dst_port); 10906ce35635SMika Westerberg if (ret) { 10916ce35635SMika Westerberg tb_port_warn(in, 10926ce35635SMika Westerberg "failed to release unused bandwidth\n"); 10936ce35635SMika Westerberg break; 10946ce35635SMika Westerberg } 10956ce35635SMika Westerberg } 10966ce35635SMika Westerberg 10976ce35635SMika Westerberg out = tunnel->dst_port; 10986ce35635SMika Westerberg ret = tb_available_bandwidth(tb, in, out, &estimated_up, 10996ce35635SMika Westerberg &estimated_down); 11006ce35635SMika Westerberg if (ret) { 11016ce35635SMika Westerberg tb_port_warn(in, 11026ce35635SMika Westerberg "failed to re-calculate estimated bandwidth\n"); 11036ce35635SMika Westerberg break; 11046ce35635SMika Westerberg } 11056ce35635SMika Westerberg 11066ce35635SMika Westerberg /* 11076ce35635SMika Westerberg * Estimated bandwidth includes: 11086ce35635SMika Westerberg * - already allocated bandwidth for the DP tunnel 11096ce35635SMika Westerberg * - available bandwidth along the path 11106ce35635SMika Westerberg * - bandwidth allocated for USB 3.x but not used. 11116ce35635SMika Westerberg */ 11126ce35635SMika Westerberg tb_port_dbg(in, "re-calculated estimated bandwidth %u/%u Mb/s\n", 11136ce35635SMika Westerberg estimated_up, estimated_down); 11146ce35635SMika Westerberg 11156ce35635SMika Westerberg if (in->sw->config.depth < out->sw->config.depth) 11166ce35635SMika Westerberg estimated_bw = estimated_down; 11176ce35635SMika Westerberg else 11186ce35635SMika Westerberg estimated_bw = estimated_up; 11196ce35635SMika Westerberg 11206ce35635SMika Westerberg if (usb4_dp_port_set_estimated_bw(in, estimated_bw)) 11216ce35635SMika Westerberg tb_port_warn(in, "failed to update estimated bandwidth\n"); 11226ce35635SMika Westerberg } 11236ce35635SMika Westerberg 11246ce35635SMika Westerberg if (first_tunnel) 11256ce35635SMika Westerberg tb_reclaim_usb3_bandwidth(tb, first_tunnel->src_port, 11266ce35635SMika Westerberg first_tunnel->dst_port); 11276ce35635SMika Westerberg 11286ce35635SMika Westerberg tb_dbg(tb, "bandwidth estimation for group %u done\n", group->index); 11296ce35635SMika Westerberg } 11306ce35635SMika Westerberg 11316ce35635SMika Westerberg static void tb_recalc_estimated_bandwidth(struct tb *tb) 11326ce35635SMika Westerberg { 11336ce35635SMika Westerberg struct tb_cm *tcm = tb_priv(tb); 11346ce35635SMika Westerberg int i; 11356ce35635SMika Westerberg 11366ce35635SMika Westerberg tb_dbg(tb, "bandwidth consumption changed, re-calculating estimated bandwidth\n"); 11376ce35635SMika Westerberg 11386ce35635SMika Westerberg for (i = 0; i < ARRAY_SIZE(tcm->groups); i++) { 11396ce35635SMika Westerberg struct tb_bandwidth_group *group = &tcm->groups[i]; 11406ce35635SMika Westerberg 11416ce35635SMika Westerberg if (!list_empty(&group->ports)) 11426ce35635SMika Westerberg tb_recalc_estimated_bandwidth_for_group(group); 11436ce35635SMika Westerberg } 11446ce35635SMika Westerberg 11456ce35635SMika Westerberg tb_dbg(tb, "bandwidth re-calculation done\n"); 11466ce35635SMika Westerberg } 11476ce35635SMika Westerberg 1148e876f34aSMika Westerberg static struct tb_port *tb_find_dp_out(struct tb *tb, struct tb_port *in) 1149e876f34aSMika Westerberg { 1150e876f34aSMika Westerberg struct tb_port *host_port, *port; 1151e876f34aSMika Westerberg struct tb_cm *tcm = tb_priv(tb); 1152e876f34aSMika Westerberg 1153e876f34aSMika Westerberg host_port = tb_route(in->sw) ? 1154e876f34aSMika Westerberg tb_port_at(tb_route(in->sw), tb->root_switch) : NULL; 1155e876f34aSMika Westerberg 1156e876f34aSMika Westerberg list_for_each_entry(port, &tcm->dp_resources, list) { 1157e876f34aSMika Westerberg if (!tb_port_is_dpout(port)) 1158e876f34aSMika Westerberg continue; 1159e876f34aSMika Westerberg 1160e876f34aSMika Westerberg if (tb_port_is_enabled(port)) { 1161b0ef48fcSMika Westerberg tb_port_dbg(port, "DP OUT in use\n"); 1162e876f34aSMika Westerberg continue; 1163e876f34aSMika Westerberg } 1164e876f34aSMika Westerberg 1165e876f34aSMika Westerberg tb_port_dbg(port, "DP OUT available\n"); 1166e876f34aSMika Westerberg 1167e876f34aSMika Westerberg /* 1168e876f34aSMika Westerberg * Keep the DP tunnel under the topology starting from 1169e876f34aSMika Westerberg * the same host router downstream port. 1170e876f34aSMika Westerberg */ 1171e876f34aSMika Westerberg if (host_port && tb_route(port->sw)) { 1172e876f34aSMika Westerberg struct tb_port *p; 1173e876f34aSMika Westerberg 1174e876f34aSMika Westerberg p = tb_port_at(tb_route(port->sw), tb->root_switch); 1175e876f34aSMika Westerberg if (p != host_port) 1176e876f34aSMika Westerberg continue; 1177e876f34aSMika Westerberg } 1178e876f34aSMika Westerberg 1179e876f34aSMika Westerberg return port; 1180e876f34aSMika Westerberg } 1181e876f34aSMika Westerberg 1182e876f34aSMika Westerberg return NULL; 1183e876f34aSMika Westerberg } 1184e876f34aSMika Westerberg 11858afe909bSMika Westerberg static void tb_tunnel_dp(struct tb *tb) 11864f807e47SMika Westerberg { 11879d2d0a5cSMika Westerberg int available_up, available_down, ret, link_nr; 11884f807e47SMika Westerberg struct tb_cm *tcm = tb_priv(tb); 11898afe909bSMika Westerberg struct tb_port *port, *in, *out; 11904f807e47SMika Westerberg struct tb_tunnel *tunnel; 11914f807e47SMika Westerberg 1192c6da62a2SMika Westerberg if (!tb_acpi_may_tunnel_dp()) { 1193c6da62a2SMika Westerberg tb_dbg(tb, "DP tunneling disabled, not creating tunnel\n"); 1194c6da62a2SMika Westerberg return; 1195c6da62a2SMika Westerberg } 1196c6da62a2SMika Westerberg 11978afe909bSMika Westerberg /* 11988afe909bSMika Westerberg * Find pair of inactive DP IN and DP OUT adapters and then 11998afe909bSMika Westerberg * establish a DP tunnel between them. 12008afe909bSMika Westerberg */ 12018afe909bSMika Westerberg tb_dbg(tb, "looking for DP IN <-> DP OUT pairs:\n"); 12024f807e47SMika Westerberg 12038afe909bSMika Westerberg in = NULL; 12048afe909bSMika Westerberg out = NULL; 12058afe909bSMika Westerberg list_for_each_entry(port, &tcm->dp_resources, list) { 1206e876f34aSMika Westerberg if (!tb_port_is_dpin(port)) 1207e876f34aSMika Westerberg continue; 1208e876f34aSMika Westerberg 12098afe909bSMika Westerberg if (tb_port_is_enabled(port)) { 1210b0ef48fcSMika Westerberg tb_port_dbg(port, "DP IN in use\n"); 12118afe909bSMika Westerberg continue; 12128afe909bSMika Westerberg } 12138afe909bSMika Westerberg 1214e876f34aSMika Westerberg tb_port_dbg(port, "DP IN available\n"); 12158afe909bSMika Westerberg 1216e876f34aSMika Westerberg out = tb_find_dp_out(tb, port); 1217e876f34aSMika Westerberg if (out) { 12188afe909bSMika Westerberg in = port; 1219e876f34aSMika Westerberg break; 1220e876f34aSMika Westerberg } 12218afe909bSMika Westerberg } 12228afe909bSMika Westerberg 12238afe909bSMika Westerberg if (!in) { 12248afe909bSMika Westerberg tb_dbg(tb, "no suitable DP IN adapter available, not tunneling\n"); 12258afe909bSMika Westerberg return; 12268afe909bSMika Westerberg } 12278afe909bSMika Westerberg if (!out) { 12288afe909bSMika Westerberg tb_dbg(tb, "no suitable DP OUT adapter available, not tunneling\n"); 12298afe909bSMika Westerberg return; 12308afe909bSMika Westerberg } 12318afe909bSMika Westerberg 12326ac6faeeSMika Westerberg /* 12339d2d0a5cSMika Westerberg * This is only applicable to links that are not bonded (so 12349d2d0a5cSMika Westerberg * when Thunderbolt 1 hardware is involved somewhere in the 12359d2d0a5cSMika Westerberg * topology). For these try to share the DP bandwidth between 12369d2d0a5cSMika Westerberg * the two lanes. 12379d2d0a5cSMika Westerberg */ 12389d2d0a5cSMika Westerberg link_nr = 1; 12399d2d0a5cSMika Westerberg list_for_each_entry(tunnel, &tcm->tunnel_list, list) { 12409d2d0a5cSMika Westerberg if (tb_tunnel_is_dp(tunnel)) { 12419d2d0a5cSMika Westerberg link_nr = 0; 12429d2d0a5cSMika Westerberg break; 12439d2d0a5cSMika Westerberg } 12449d2d0a5cSMika Westerberg } 12459d2d0a5cSMika Westerberg 12469d2d0a5cSMika Westerberg /* 12476ac6faeeSMika Westerberg * DP stream needs the domain to be active so runtime resume 12486ac6faeeSMika Westerberg * both ends of the tunnel. 12496ac6faeeSMika Westerberg * 12506ac6faeeSMika Westerberg * This should bring the routers in the middle active as well 12516ac6faeeSMika Westerberg * and keeps the domain from runtime suspending while the DP 12526ac6faeeSMika Westerberg * tunnel is active. 12536ac6faeeSMika Westerberg */ 12546ac6faeeSMika Westerberg pm_runtime_get_sync(&in->sw->dev); 12556ac6faeeSMika Westerberg pm_runtime_get_sync(&out->sw->dev); 12566ac6faeeSMika Westerberg 12578afe909bSMika Westerberg if (tb_switch_alloc_dp_resource(in->sw, in)) { 12588afe909bSMika Westerberg tb_port_dbg(in, "no resource available for DP IN, not tunneling\n"); 12596ac6faeeSMika Westerberg goto err_rpm_put; 12608afe909bSMika Westerberg } 12614f807e47SMika Westerberg 12626ce35635SMika Westerberg if (!tb_attach_bandwidth_group(tcm, in, out)) 12636ce35635SMika Westerberg goto err_dealloc_dp; 12646ce35635SMika Westerberg 12650bd680cdSMika Westerberg /* Make all unused USB3 bandwidth available for the new DP tunnel */ 12660bd680cdSMika Westerberg ret = tb_release_unused_usb3_bandwidth(tb, in, out); 12670bd680cdSMika Westerberg if (ret) { 12680bd680cdSMika Westerberg tb_warn(tb, "failed to release unused bandwidth\n"); 12696ce35635SMika Westerberg goto err_detach_group; 1270a11b88adSMika Westerberg } 1271a11b88adSMika Westerberg 12726ce35635SMika Westerberg ret = tb_available_bandwidth(tb, in, out, &available_up, &available_down); 12730bd680cdSMika Westerberg if (ret) 12746ce35635SMika Westerberg goto err_reclaim_usb; 1275a11b88adSMika Westerberg 12760bd680cdSMika Westerberg tb_dbg(tb, "available bandwidth for new DP tunnel %u/%u Mb/s\n", 12770bd680cdSMika Westerberg available_up, available_down); 12780bd680cdSMika Westerberg 12799d2d0a5cSMika Westerberg tunnel = tb_tunnel_alloc_dp(tb, in, out, link_nr, available_up, 12809d2d0a5cSMika Westerberg available_down); 12814f807e47SMika Westerberg if (!tunnel) { 12828afe909bSMika Westerberg tb_port_dbg(out, "could not allocate DP tunnel\n"); 12836ce35635SMika Westerberg goto err_reclaim_usb; 12844f807e47SMika Westerberg } 12854f807e47SMika Westerberg 12864f807e47SMika Westerberg if (tb_tunnel_activate(tunnel)) { 12874f807e47SMika Westerberg tb_port_info(out, "DP tunnel activation failed, aborting\n"); 12880bd680cdSMika Westerberg goto err_free; 12894f807e47SMika Westerberg } 12904f807e47SMika Westerberg 12914f807e47SMika Westerberg list_add_tail(&tunnel->list, &tcm->tunnel_list); 12920bd680cdSMika Westerberg tb_reclaim_usb3_bandwidth(tb, in, out); 12936ce35635SMika Westerberg 12946ce35635SMika Westerberg /* Update the domain with the new bandwidth estimation */ 12956ce35635SMika Westerberg tb_recalc_estimated_bandwidth(tb); 12966ce35635SMika Westerberg 12973084b48fSGil Fine /* 12983084b48fSGil Fine * In case of DP tunnel exists, change host router's 1st children 12993084b48fSGil Fine * TMU mode to HiFi for CL0s to work. 13003084b48fSGil Fine */ 13017d283f41SMika Westerberg tb_increase_tmu_accuracy(tunnel); 13028afe909bSMika Westerberg return; 13038afe909bSMika Westerberg 13040bd680cdSMika Westerberg err_free: 13050bd680cdSMika Westerberg tb_tunnel_free(tunnel); 13066ce35635SMika Westerberg err_reclaim_usb: 13070bd680cdSMika Westerberg tb_reclaim_usb3_bandwidth(tb, in, out); 13086ce35635SMika Westerberg err_detach_group: 13096ce35635SMika Westerberg tb_detach_bandwidth_group(in); 13100bd680cdSMika Westerberg err_dealloc_dp: 13118afe909bSMika Westerberg tb_switch_dealloc_dp_resource(in->sw, in); 13126ac6faeeSMika Westerberg err_rpm_put: 13136ac6faeeSMika Westerberg pm_runtime_mark_last_busy(&out->sw->dev); 13146ac6faeeSMika Westerberg pm_runtime_put_autosuspend(&out->sw->dev); 13156ac6faeeSMika Westerberg pm_runtime_mark_last_busy(&in->sw->dev); 13166ac6faeeSMika Westerberg pm_runtime_put_autosuspend(&in->sw->dev); 13174f807e47SMika Westerberg } 13184f807e47SMika Westerberg 13198afe909bSMika Westerberg static void tb_dp_resource_unavailable(struct tb *tb, struct tb_port *port) 13204f807e47SMika Westerberg { 13218afe909bSMika Westerberg struct tb_port *in, *out; 13228afe909bSMika Westerberg struct tb_tunnel *tunnel; 13238afe909bSMika Westerberg 13248afe909bSMika Westerberg if (tb_port_is_dpin(port)) { 13258afe909bSMika Westerberg tb_port_dbg(port, "DP IN resource unavailable\n"); 13268afe909bSMika Westerberg in = port; 13278afe909bSMika Westerberg out = NULL; 13288afe909bSMika Westerberg } else { 13298afe909bSMika Westerberg tb_port_dbg(port, "DP OUT resource unavailable\n"); 13308afe909bSMika Westerberg in = NULL; 13318afe909bSMika Westerberg out = port; 13328afe909bSMika Westerberg } 13338afe909bSMika Westerberg 13348afe909bSMika Westerberg tunnel = tb_find_tunnel(tb, TB_TUNNEL_DP, in, out); 13358afe909bSMika Westerberg tb_deactivate_and_free_tunnel(tunnel); 13368afe909bSMika Westerberg list_del_init(&port->list); 13378afe909bSMika Westerberg 13388afe909bSMika Westerberg /* 13398afe909bSMika Westerberg * See if there is another DP OUT port that can be used for 13408afe909bSMika Westerberg * to create another tunnel. 13418afe909bSMika Westerberg */ 13426ce35635SMika Westerberg tb_recalc_estimated_bandwidth(tb); 13438afe909bSMika Westerberg tb_tunnel_dp(tb); 13448afe909bSMika Westerberg } 13458afe909bSMika Westerberg 13468afe909bSMika Westerberg static void tb_dp_resource_available(struct tb *tb, struct tb_port *port) 13478afe909bSMika Westerberg { 13488afe909bSMika Westerberg struct tb_cm *tcm = tb_priv(tb); 13498afe909bSMika Westerberg struct tb_port *p; 13508afe909bSMika Westerberg 13518afe909bSMika Westerberg if (tb_port_is_enabled(port)) 13528afe909bSMika Westerberg return; 13538afe909bSMika Westerberg 13548afe909bSMika Westerberg list_for_each_entry(p, &tcm->dp_resources, list) { 13558afe909bSMika Westerberg if (p == port) 13568afe909bSMika Westerberg return; 13578afe909bSMika Westerberg } 13588afe909bSMika Westerberg 13598afe909bSMika Westerberg tb_port_dbg(port, "DP %s resource available\n", 13608afe909bSMika Westerberg tb_port_is_dpin(port) ? "IN" : "OUT"); 13618afe909bSMika Westerberg list_add_tail(&port->list, &tcm->dp_resources); 13628afe909bSMika Westerberg 13638afe909bSMika Westerberg /* Look for suitable DP IN <-> DP OUT pairs now */ 13648afe909bSMika Westerberg tb_tunnel_dp(tb); 13654f807e47SMika Westerberg } 13664f807e47SMika Westerberg 136781a2e3e4SMika Westerberg static void tb_disconnect_and_release_dp(struct tb *tb) 136881a2e3e4SMika Westerberg { 136981a2e3e4SMika Westerberg struct tb_cm *tcm = tb_priv(tb); 137081a2e3e4SMika Westerberg struct tb_tunnel *tunnel, *n; 137181a2e3e4SMika Westerberg 137281a2e3e4SMika Westerberg /* 137381a2e3e4SMika Westerberg * Tear down all DP tunnels and release their resources. They 137481a2e3e4SMika Westerberg * will be re-established after resume based on plug events. 137581a2e3e4SMika Westerberg */ 137681a2e3e4SMika Westerberg list_for_each_entry_safe_reverse(tunnel, n, &tcm->tunnel_list, list) { 137781a2e3e4SMika Westerberg if (tb_tunnel_is_dp(tunnel)) 137881a2e3e4SMika Westerberg tb_deactivate_and_free_tunnel(tunnel); 137981a2e3e4SMika Westerberg } 138081a2e3e4SMika Westerberg 138181a2e3e4SMika Westerberg while (!list_empty(&tcm->dp_resources)) { 138281a2e3e4SMika Westerberg struct tb_port *port; 138381a2e3e4SMika Westerberg 138481a2e3e4SMika Westerberg port = list_first_entry(&tcm->dp_resources, 138581a2e3e4SMika Westerberg struct tb_port, list); 138681a2e3e4SMika Westerberg list_del_init(&port->list); 138781a2e3e4SMika Westerberg } 138881a2e3e4SMika Westerberg } 138981a2e3e4SMika Westerberg 13903da88be2SMika Westerberg static int tb_disconnect_pci(struct tb *tb, struct tb_switch *sw) 13913da88be2SMika Westerberg { 13923da88be2SMika Westerberg struct tb_tunnel *tunnel; 13933da88be2SMika Westerberg struct tb_port *up; 13943da88be2SMika Westerberg 13953da88be2SMika Westerberg up = tb_switch_find_port(sw, TB_TYPE_PCIE_UP); 13963da88be2SMika Westerberg if (WARN_ON(!up)) 13973da88be2SMika Westerberg return -ENODEV; 13983da88be2SMika Westerberg 13993da88be2SMika Westerberg tunnel = tb_find_tunnel(tb, TB_TUNNEL_PCI, NULL, up); 14003da88be2SMika Westerberg if (WARN_ON(!tunnel)) 14013da88be2SMika Westerberg return -ENODEV; 14023da88be2SMika Westerberg 140330a4eca6SMika Westerberg tb_switch_xhci_disconnect(sw); 140430a4eca6SMika Westerberg 14053da88be2SMika Westerberg tb_tunnel_deactivate(tunnel); 14063da88be2SMika Westerberg list_del(&tunnel->list); 14073da88be2SMika Westerberg tb_tunnel_free(tunnel); 14083da88be2SMika Westerberg return 0; 14093da88be2SMika Westerberg } 14103da88be2SMika Westerberg 141199cabbb0SMika Westerberg static int tb_tunnel_pci(struct tb *tb, struct tb_switch *sw) 141299cabbb0SMika Westerberg { 141399cabbb0SMika Westerberg struct tb_port *up, *down, *port; 14149d3cce0bSMika Westerberg struct tb_cm *tcm = tb_priv(tb); 141599cabbb0SMika Westerberg struct tb_tunnel *tunnel; 14169d3cce0bSMika Westerberg 1417386e5e29SMika Westerberg up = tb_switch_find_port(sw, TB_TYPE_PCIE_UP); 141899cabbb0SMika Westerberg if (!up) 141999cabbb0SMika Westerberg return 0; 14203364f0c1SAndreas Noever 142199cabbb0SMika Westerberg /* 142299cabbb0SMika Westerberg * Look up available down port. Since we are chaining it should 142399cabbb0SMika Westerberg * be found right above this switch. 142499cabbb0SMika Westerberg */ 14257ce54221SGil Fine port = tb_switch_downstream_port(sw); 14267ce54221SGil Fine down = tb_find_pcie_down(tb_switch_parent(sw), port); 142799cabbb0SMika Westerberg if (!down) 142899cabbb0SMika Westerberg return 0; 14293364f0c1SAndreas Noever 143099cabbb0SMika Westerberg tunnel = tb_tunnel_alloc_pci(tb, up, down); 143199cabbb0SMika Westerberg if (!tunnel) 143299cabbb0SMika Westerberg return -ENOMEM; 14333364f0c1SAndreas Noever 143493f36adeSMika Westerberg if (tb_tunnel_activate(tunnel)) { 143599cabbb0SMika Westerberg tb_port_info(up, 14363364f0c1SAndreas Noever "PCIe tunnel activation failed, aborting\n"); 143793f36adeSMika Westerberg tb_tunnel_free(tunnel); 143899cabbb0SMika Westerberg return -EIO; 14393364f0c1SAndreas Noever } 14403364f0c1SAndreas Noever 144143f977bcSGil Fine /* 144243f977bcSGil Fine * PCIe L1 is needed to enable CL0s for Titan Ridge so enable it 144343f977bcSGil Fine * here. 144443f977bcSGil Fine */ 144543f977bcSGil Fine if (tb_switch_pcie_l1_enable(sw)) 144643f977bcSGil Fine tb_sw_warn(sw, "failed to enable PCIe L1 for Titan Ridge\n"); 144743f977bcSGil Fine 144830a4eca6SMika Westerberg if (tb_switch_xhci_connect(sw)) 144930a4eca6SMika Westerberg tb_sw_warn(sw, "failed to connect xHCI\n"); 145030a4eca6SMika Westerberg 145199cabbb0SMika Westerberg list_add_tail(&tunnel->list, &tcm->tunnel_list); 145299cabbb0SMika Westerberg return 0; 14533364f0c1SAndreas Noever } 14549da672a4SAndreas Noever 1455180b0689SMika Westerberg static int tb_approve_xdomain_paths(struct tb *tb, struct tb_xdomain *xd, 1456180b0689SMika Westerberg int transmit_path, int transmit_ring, 1457180b0689SMika Westerberg int receive_path, int receive_ring) 14587ea4cd6bSMika Westerberg { 14597ea4cd6bSMika Westerberg struct tb_cm *tcm = tb_priv(tb); 14607ea4cd6bSMika Westerberg struct tb_port *nhi_port, *dst_port; 14617ea4cd6bSMika Westerberg struct tb_tunnel *tunnel; 14627ea4cd6bSMika Westerberg struct tb_switch *sw; 14637ea4cd6bSMika Westerberg 14647ea4cd6bSMika Westerberg sw = tb_to_switch(xd->dev.parent); 14657ea4cd6bSMika Westerberg dst_port = tb_port_at(xd->route, sw); 1466386e5e29SMika Westerberg nhi_port = tb_switch_find_port(tb->root_switch, TB_TYPE_NHI); 14677ea4cd6bSMika Westerberg 14687ea4cd6bSMika Westerberg mutex_lock(&tb->lock); 1469180b0689SMika Westerberg tunnel = tb_tunnel_alloc_dma(tb, nhi_port, dst_port, transmit_path, 1470180b0689SMika Westerberg transmit_ring, receive_path, receive_ring); 14717ea4cd6bSMika Westerberg if (!tunnel) { 14727ea4cd6bSMika Westerberg mutex_unlock(&tb->lock); 14737ea4cd6bSMika Westerberg return -ENOMEM; 14747ea4cd6bSMika Westerberg } 14757ea4cd6bSMika Westerberg 14767ea4cd6bSMika Westerberg if (tb_tunnel_activate(tunnel)) { 14777ea4cd6bSMika Westerberg tb_port_info(nhi_port, 14787ea4cd6bSMika Westerberg "DMA tunnel activation failed, aborting\n"); 14797ea4cd6bSMika Westerberg tb_tunnel_free(tunnel); 14807ea4cd6bSMika Westerberg mutex_unlock(&tb->lock); 14817ea4cd6bSMika Westerberg return -EIO; 14827ea4cd6bSMika Westerberg } 14837ea4cd6bSMika Westerberg 14847ea4cd6bSMika Westerberg list_add_tail(&tunnel->list, &tcm->tunnel_list); 14857ea4cd6bSMika Westerberg mutex_unlock(&tb->lock); 14867ea4cd6bSMika Westerberg return 0; 14877ea4cd6bSMika Westerberg } 14887ea4cd6bSMika Westerberg 1489180b0689SMika Westerberg static void __tb_disconnect_xdomain_paths(struct tb *tb, struct tb_xdomain *xd, 1490180b0689SMika Westerberg int transmit_path, int transmit_ring, 1491180b0689SMika Westerberg int receive_path, int receive_ring) 14927ea4cd6bSMika Westerberg { 1493180b0689SMika Westerberg struct tb_cm *tcm = tb_priv(tb); 1494180b0689SMika Westerberg struct tb_port *nhi_port, *dst_port; 1495180b0689SMika Westerberg struct tb_tunnel *tunnel, *n; 14967ea4cd6bSMika Westerberg struct tb_switch *sw; 14977ea4cd6bSMika Westerberg 14987ea4cd6bSMika Westerberg sw = tb_to_switch(xd->dev.parent); 14997ea4cd6bSMika Westerberg dst_port = tb_port_at(xd->route, sw); 1500180b0689SMika Westerberg nhi_port = tb_switch_find_port(tb->root_switch, TB_TYPE_NHI); 15017ea4cd6bSMika Westerberg 1502180b0689SMika Westerberg list_for_each_entry_safe(tunnel, n, &tcm->tunnel_list, list) { 1503180b0689SMika Westerberg if (!tb_tunnel_is_dma(tunnel)) 1504180b0689SMika Westerberg continue; 1505180b0689SMika Westerberg if (tunnel->src_port != nhi_port || tunnel->dst_port != dst_port) 1506180b0689SMika Westerberg continue; 1507180b0689SMika Westerberg 1508180b0689SMika Westerberg if (tb_tunnel_match_dma(tunnel, transmit_path, transmit_ring, 1509180b0689SMika Westerberg receive_path, receive_ring)) 15108afe909bSMika Westerberg tb_deactivate_and_free_tunnel(tunnel); 15117ea4cd6bSMika Westerberg } 1512180b0689SMika Westerberg } 15137ea4cd6bSMika Westerberg 1514180b0689SMika Westerberg static int tb_disconnect_xdomain_paths(struct tb *tb, struct tb_xdomain *xd, 1515180b0689SMika Westerberg int transmit_path, int transmit_ring, 1516180b0689SMika Westerberg int receive_path, int receive_ring) 15177ea4cd6bSMika Westerberg { 15187ea4cd6bSMika Westerberg if (!xd->is_unplugged) { 15197ea4cd6bSMika Westerberg mutex_lock(&tb->lock); 1520180b0689SMika Westerberg __tb_disconnect_xdomain_paths(tb, xd, transmit_path, 1521180b0689SMika Westerberg transmit_ring, receive_path, 1522180b0689SMika Westerberg receive_ring); 15237ea4cd6bSMika Westerberg mutex_unlock(&tb->lock); 15247ea4cd6bSMika Westerberg } 15257ea4cd6bSMika Westerberg return 0; 15267ea4cd6bSMika Westerberg } 15277ea4cd6bSMika Westerberg 1528d6cc51cdSAndreas Noever /* hotplug handling */ 1529d6cc51cdSAndreas Noever 1530877e50b3SLee Jones /* 1531d6cc51cdSAndreas Noever * tb_handle_hotplug() - handle hotplug event 1532d6cc51cdSAndreas Noever * 1533d6cc51cdSAndreas Noever * Executes on tb->wq. 1534d6cc51cdSAndreas Noever */ 1535d6cc51cdSAndreas Noever static void tb_handle_hotplug(struct work_struct *work) 1536d6cc51cdSAndreas Noever { 1537d6cc51cdSAndreas Noever struct tb_hotplug_event *ev = container_of(work, typeof(*ev), work); 1538d6cc51cdSAndreas Noever struct tb *tb = ev->tb; 15399d3cce0bSMika Westerberg struct tb_cm *tcm = tb_priv(tb); 1540053596d9SAndreas Noever struct tb_switch *sw; 1541053596d9SAndreas Noever struct tb_port *port; 1542284652a4SMika Westerberg 15436ac6faeeSMika Westerberg /* Bring the domain back from sleep if it was suspended */ 15446ac6faeeSMika Westerberg pm_runtime_get_sync(&tb->dev); 15456ac6faeeSMika Westerberg 1546d6cc51cdSAndreas Noever mutex_lock(&tb->lock); 15479d3cce0bSMika Westerberg if (!tcm->hotplug_active) 1548d6cc51cdSAndreas Noever goto out; /* during init, suspend or shutdown */ 1549d6cc51cdSAndreas Noever 15508f965efdSMika Westerberg sw = tb_switch_find_by_route(tb, ev->route); 1551053596d9SAndreas Noever if (!sw) { 1552053596d9SAndreas Noever tb_warn(tb, 1553053596d9SAndreas Noever "hotplug event from non existent switch %llx:%x (unplug: %d)\n", 1554053596d9SAndreas Noever ev->route, ev->port, ev->unplug); 1555053596d9SAndreas Noever goto out; 1556053596d9SAndreas Noever } 1557053596d9SAndreas Noever if (ev->port > sw->config.max_port_number) { 1558053596d9SAndreas Noever tb_warn(tb, 1559053596d9SAndreas Noever "hotplug event from non existent port %llx:%x (unplug: %d)\n", 1560053596d9SAndreas Noever ev->route, ev->port, ev->unplug); 15618f965efdSMika Westerberg goto put_sw; 1562053596d9SAndreas Noever } 1563053596d9SAndreas Noever port = &sw->ports[ev->port]; 1564053596d9SAndreas Noever if (tb_is_upstream_port(port)) { 1565dfe40ca4SMika Westerberg tb_dbg(tb, "hotplug event for upstream port %llx:%x (unplug: %d)\n", 1566053596d9SAndreas Noever ev->route, ev->port, ev->unplug); 15678f965efdSMika Westerberg goto put_sw; 1568053596d9SAndreas Noever } 15696ac6faeeSMika Westerberg 15706ac6faeeSMika Westerberg pm_runtime_get_sync(&sw->dev); 15716ac6faeeSMika Westerberg 1572053596d9SAndreas Noever if (ev->unplug) { 1573dacb1287SKranthi Kuntala tb_retimer_remove_all(port); 1574dacb1287SKranthi Kuntala 1575dfe40ca4SMika Westerberg if (tb_port_has_remote(port)) { 15767ea4cd6bSMika Westerberg tb_port_dbg(port, "switch unplugged\n"); 1577aae20bb6SLukas Wunner tb_sw_set_unplugged(port->remote->sw); 15783364f0c1SAndreas Noever tb_free_invalid_tunnels(tb); 15798afe909bSMika Westerberg tb_remove_dp_resources(port->remote->sw); 1580cf29b9afSRajmohan Mani tb_switch_tmu_disable(port->remote->sw); 1581de462039SMika Westerberg tb_switch_unconfigure_link(port->remote->sw); 158291c0c120SMika Westerberg tb_switch_lane_bonding_disable(port->remote->sw); 1583bfe778acSMika Westerberg tb_switch_remove(port->remote->sw); 1584053596d9SAndreas Noever port->remote = NULL; 1585dfe40ca4SMika Westerberg if (port->dual_link_port) 1586dfe40ca4SMika Westerberg port->dual_link_port->remote = NULL; 15878afe909bSMika Westerberg /* Maybe we can create another DP tunnel */ 15886ce35635SMika Westerberg tb_recalc_estimated_bandwidth(tb); 15898afe909bSMika Westerberg tb_tunnel_dp(tb); 15907ea4cd6bSMika Westerberg } else if (port->xdomain) { 15917ea4cd6bSMika Westerberg struct tb_xdomain *xd = tb_xdomain_get(port->xdomain); 15927ea4cd6bSMika Westerberg 15937ea4cd6bSMika Westerberg tb_port_dbg(port, "xdomain unplugged\n"); 15947ea4cd6bSMika Westerberg /* 15957ea4cd6bSMika Westerberg * Service drivers are unbound during 15967ea4cd6bSMika Westerberg * tb_xdomain_remove() so setting XDomain as 15977ea4cd6bSMika Westerberg * unplugged here prevents deadlock if they call 15987ea4cd6bSMika Westerberg * tb_xdomain_disable_paths(). We will tear down 1599180b0689SMika Westerberg * all the tunnels below. 16007ea4cd6bSMika Westerberg */ 16017ea4cd6bSMika Westerberg xd->is_unplugged = true; 16027ea4cd6bSMika Westerberg tb_xdomain_remove(xd); 16037ea4cd6bSMika Westerberg port->xdomain = NULL; 1604180b0689SMika Westerberg __tb_disconnect_xdomain_paths(tb, xd, -1, -1, -1, -1); 16057ea4cd6bSMika Westerberg tb_xdomain_put(xd); 1606284652a4SMika Westerberg tb_port_unconfigure_xdomain(port); 16078afe909bSMika Westerberg } else if (tb_port_is_dpout(port) || tb_port_is_dpin(port)) { 16088afe909bSMika Westerberg tb_dp_resource_unavailable(tb, port); 160930a4eca6SMika Westerberg } else if (!port->port) { 161030a4eca6SMika Westerberg tb_sw_dbg(sw, "xHCI disconnect request\n"); 161130a4eca6SMika Westerberg tb_switch_xhci_disconnect(sw); 1612053596d9SAndreas Noever } else { 161362efe699SMika Westerberg tb_port_dbg(port, 1614053596d9SAndreas Noever "got unplug event for disconnected port, ignoring\n"); 1615053596d9SAndreas Noever } 1616053596d9SAndreas Noever } else if (port->remote) { 161762efe699SMika Westerberg tb_port_dbg(port, "got plug event for connected port, ignoring\n"); 161830a4eca6SMika Westerberg } else if (!port->port && sw->authorized) { 161930a4eca6SMika Westerberg tb_sw_dbg(sw, "xHCI connect request\n"); 162030a4eca6SMika Westerberg tb_switch_xhci_connect(sw); 1621053596d9SAndreas Noever } else { 1622344e0643SMika Westerberg if (tb_port_is_null(port)) { 162362efe699SMika Westerberg tb_port_dbg(port, "hotplug: scanning\n"); 1624053596d9SAndreas Noever tb_scan_port(port); 162599cabbb0SMika Westerberg if (!port->remote) 162662efe699SMika Westerberg tb_port_dbg(port, "hotplug: no switch found\n"); 16278afe909bSMika Westerberg } else if (tb_port_is_dpout(port) || tb_port_is_dpin(port)) { 16288afe909bSMika Westerberg tb_dp_resource_available(tb, port); 1629053596d9SAndreas Noever } 1630344e0643SMika Westerberg } 16318f965efdSMika Westerberg 16326ac6faeeSMika Westerberg pm_runtime_mark_last_busy(&sw->dev); 16336ac6faeeSMika Westerberg pm_runtime_put_autosuspend(&sw->dev); 16346ac6faeeSMika Westerberg 16358f965efdSMika Westerberg put_sw: 16368f965efdSMika Westerberg tb_switch_put(sw); 1637d6cc51cdSAndreas Noever out: 1638d6cc51cdSAndreas Noever mutex_unlock(&tb->lock); 16396ac6faeeSMika Westerberg 16406ac6faeeSMika Westerberg pm_runtime_mark_last_busy(&tb->dev); 16416ac6faeeSMika Westerberg pm_runtime_put_autosuspend(&tb->dev); 16426ac6faeeSMika Westerberg 1643d6cc51cdSAndreas Noever kfree(ev); 1644d6cc51cdSAndreas Noever } 1645d6cc51cdSAndreas Noever 16466ce35635SMika Westerberg static int tb_alloc_dp_bandwidth(struct tb_tunnel *tunnel, int *requested_up, 16476ce35635SMika Westerberg int *requested_down) 16486ce35635SMika Westerberg { 16496ce35635SMika Westerberg int allocated_up, allocated_down, available_up, available_down, ret; 16506ce35635SMika Westerberg int requested_up_corrected, requested_down_corrected, granularity; 16516ce35635SMika Westerberg int max_up, max_down, max_up_rounded, max_down_rounded; 16526ce35635SMika Westerberg struct tb *tb = tunnel->tb; 16536ce35635SMika Westerberg struct tb_port *in, *out; 16546ce35635SMika Westerberg 16556ce35635SMika Westerberg ret = tb_tunnel_allocated_bandwidth(tunnel, &allocated_up, &allocated_down); 16566ce35635SMika Westerberg if (ret) 16576ce35635SMika Westerberg return ret; 16586ce35635SMika Westerberg 16596ce35635SMika Westerberg in = tunnel->src_port; 16606ce35635SMika Westerberg out = tunnel->dst_port; 16616ce35635SMika Westerberg 16626ce35635SMika Westerberg tb_port_dbg(in, "bandwidth allocated currently %d/%d Mb/s\n", 16636ce35635SMika Westerberg allocated_up, allocated_down); 16646ce35635SMika Westerberg 16656ce35635SMika Westerberg /* 16666ce35635SMika Westerberg * If we get rounded up request from graphics side, say HBR2 x 4 16676ce35635SMika Westerberg * that is 17500 instead of 17280 (this is because of the 16686ce35635SMika Westerberg * granularity), we allow it too. Here the graphics has already 16696ce35635SMika Westerberg * negotiated with the DPRX the maximum possible rates (which is 16706ce35635SMika Westerberg * 17280 in this case). 16716ce35635SMika Westerberg * 16726ce35635SMika Westerberg * Since the link cannot go higher than 17280 we use that in our 16736ce35635SMika Westerberg * calculations but the DP IN adapter Allocated BW write must be 16746ce35635SMika Westerberg * the same value (17500) otherwise the adapter will mark it as 16756ce35635SMika Westerberg * failed for graphics. 16766ce35635SMika Westerberg */ 16776ce35635SMika Westerberg ret = tb_tunnel_maximum_bandwidth(tunnel, &max_up, &max_down); 16786ce35635SMika Westerberg if (ret) 16796ce35635SMika Westerberg return ret; 16806ce35635SMika Westerberg 16816ce35635SMika Westerberg ret = usb4_dp_port_granularity(in); 16826ce35635SMika Westerberg if (ret < 0) 16836ce35635SMika Westerberg return ret; 16846ce35635SMika Westerberg granularity = ret; 16856ce35635SMika Westerberg 16866ce35635SMika Westerberg max_up_rounded = roundup(max_up, granularity); 16876ce35635SMika Westerberg max_down_rounded = roundup(max_down, granularity); 16886ce35635SMika Westerberg 16896ce35635SMika Westerberg /* 16906ce35635SMika Westerberg * This will "fix" the request down to the maximum supported 16916ce35635SMika Westerberg * rate * lanes if it is at the maximum rounded up level. 16926ce35635SMika Westerberg */ 16936ce35635SMika Westerberg requested_up_corrected = *requested_up; 16946ce35635SMika Westerberg if (requested_up_corrected == max_up_rounded) 16956ce35635SMika Westerberg requested_up_corrected = max_up; 16966ce35635SMika Westerberg else if (requested_up_corrected < 0) 16976ce35635SMika Westerberg requested_up_corrected = 0; 16986ce35635SMika Westerberg requested_down_corrected = *requested_down; 16996ce35635SMika Westerberg if (requested_down_corrected == max_down_rounded) 17006ce35635SMika Westerberg requested_down_corrected = max_down; 17016ce35635SMika Westerberg else if (requested_down_corrected < 0) 17026ce35635SMika Westerberg requested_down_corrected = 0; 17036ce35635SMika Westerberg 17046ce35635SMika Westerberg tb_port_dbg(in, "corrected bandwidth request %d/%d Mb/s\n", 17056ce35635SMika Westerberg requested_up_corrected, requested_down_corrected); 17066ce35635SMika Westerberg 17076ce35635SMika Westerberg if ((*requested_up >= 0 && requested_up_corrected > max_up_rounded) || 17086ce35635SMika Westerberg (*requested_down >= 0 && requested_down_corrected > max_down_rounded)) { 17096ce35635SMika Westerberg tb_port_dbg(in, "bandwidth request too high (%d/%d Mb/s > %d/%d Mb/s)\n", 17106ce35635SMika Westerberg requested_up_corrected, requested_down_corrected, 17116ce35635SMika Westerberg max_up_rounded, max_down_rounded); 17126ce35635SMika Westerberg return -ENOBUFS; 17136ce35635SMika Westerberg } 17146ce35635SMika Westerberg 17156ce35635SMika Westerberg if ((*requested_up >= 0 && requested_up_corrected <= allocated_up) || 17166ce35635SMika Westerberg (*requested_down >= 0 && requested_down_corrected <= allocated_down)) { 17176ce35635SMika Westerberg /* 17186ce35635SMika Westerberg * If requested bandwidth is less or equal than what is 17196ce35635SMika Westerberg * currently allocated to that tunnel we simply change 17206ce35635SMika Westerberg * the reservation of the tunnel. Since all the tunnels 17216ce35635SMika Westerberg * going out from the same USB4 port are in the same 17226ce35635SMika Westerberg * group the released bandwidth will be taken into 17236ce35635SMika Westerberg * account for the other tunnels automatically below. 17246ce35635SMika Westerberg */ 17256ce35635SMika Westerberg return tb_tunnel_alloc_bandwidth(tunnel, requested_up, 17266ce35635SMika Westerberg requested_down); 17276ce35635SMika Westerberg } 17286ce35635SMika Westerberg 17296ce35635SMika Westerberg /* 17306ce35635SMika Westerberg * More bandwidth is requested. Release all the potential 17316ce35635SMika Westerberg * bandwidth from USB3 first. 17326ce35635SMika Westerberg */ 17336ce35635SMika Westerberg ret = tb_release_unused_usb3_bandwidth(tb, in, out); 17346ce35635SMika Westerberg if (ret) 17356ce35635SMika Westerberg return ret; 17366ce35635SMika Westerberg 17376ce35635SMika Westerberg /* 17386ce35635SMika Westerberg * Then go over all tunnels that cross the same USB4 ports (they 17396ce35635SMika Westerberg * are also in the same group but we use the same function here 17406ce35635SMika Westerberg * that we use with the normal bandwidth allocation). 17416ce35635SMika Westerberg */ 17426ce35635SMika Westerberg ret = tb_available_bandwidth(tb, in, out, &available_up, &available_down); 17436ce35635SMika Westerberg if (ret) 17446ce35635SMika Westerberg goto reclaim; 17456ce35635SMika Westerberg 17466ce35635SMika Westerberg tb_port_dbg(in, "bandwidth available for allocation %d/%d Mb/s\n", 17476ce35635SMika Westerberg available_up, available_down); 17486ce35635SMika Westerberg 17496ce35635SMika Westerberg if ((*requested_up >= 0 && available_up >= requested_up_corrected) || 17506ce35635SMika Westerberg (*requested_down >= 0 && available_down >= requested_down_corrected)) { 17516ce35635SMika Westerberg ret = tb_tunnel_alloc_bandwidth(tunnel, requested_up, 17526ce35635SMika Westerberg requested_down); 17536ce35635SMika Westerberg } else { 17546ce35635SMika Westerberg ret = -ENOBUFS; 17556ce35635SMika Westerberg } 17566ce35635SMika Westerberg 17576ce35635SMika Westerberg reclaim: 17586ce35635SMika Westerberg tb_reclaim_usb3_bandwidth(tb, in, out); 17596ce35635SMika Westerberg return ret; 17606ce35635SMika Westerberg } 17616ce35635SMika Westerberg 17626ce35635SMika Westerberg static void tb_handle_dp_bandwidth_request(struct work_struct *work) 17636ce35635SMika Westerberg { 17646ce35635SMika Westerberg struct tb_hotplug_event *ev = container_of(work, typeof(*ev), work); 17656ce35635SMika Westerberg int requested_bw, requested_up, requested_down, ret; 17666ce35635SMika Westerberg struct tb_port *in, *out; 17676ce35635SMika Westerberg struct tb_tunnel *tunnel; 17686ce35635SMika Westerberg struct tb *tb = ev->tb; 17696ce35635SMika Westerberg struct tb_cm *tcm = tb_priv(tb); 17706ce35635SMika Westerberg struct tb_switch *sw; 17716ce35635SMika Westerberg 17726ce35635SMika Westerberg pm_runtime_get_sync(&tb->dev); 17736ce35635SMika Westerberg 17746ce35635SMika Westerberg mutex_lock(&tb->lock); 17756ce35635SMika Westerberg if (!tcm->hotplug_active) 17766ce35635SMika Westerberg goto unlock; 17776ce35635SMika Westerberg 17786ce35635SMika Westerberg sw = tb_switch_find_by_route(tb, ev->route); 17796ce35635SMika Westerberg if (!sw) { 17806ce35635SMika Westerberg tb_warn(tb, "bandwidth request from non-existent router %llx\n", 17816ce35635SMika Westerberg ev->route); 17826ce35635SMika Westerberg goto unlock; 17836ce35635SMika Westerberg } 17846ce35635SMika Westerberg 17856ce35635SMika Westerberg in = &sw->ports[ev->port]; 17866ce35635SMika Westerberg if (!tb_port_is_dpin(in)) { 17876ce35635SMika Westerberg tb_port_warn(in, "bandwidth request to non-DP IN adapter\n"); 17886ce35635SMika Westerberg goto unlock; 17896ce35635SMika Westerberg } 17906ce35635SMika Westerberg 17916ce35635SMika Westerberg tb_port_dbg(in, "handling bandwidth allocation request\n"); 17926ce35635SMika Westerberg 17936ce35635SMika Westerberg if (!usb4_dp_port_bw_mode_enabled(in)) { 17946ce35635SMika Westerberg tb_port_warn(in, "bandwidth allocation mode not enabled\n"); 17956ce35635SMika Westerberg goto unlock; 17966ce35635SMika Westerberg } 17976ce35635SMika Westerberg 1798ace75e18SMika Westerberg ret = usb4_dp_port_requested_bw(in); 1799ace75e18SMika Westerberg if (ret < 0) { 1800ace75e18SMika Westerberg if (ret == -ENODATA) 18016ce35635SMika Westerberg tb_port_dbg(in, "no bandwidth request active\n"); 1802ace75e18SMika Westerberg else 1803ace75e18SMika Westerberg tb_port_warn(in, "failed to read requested bandwidth\n"); 18046ce35635SMika Westerberg goto unlock; 18056ce35635SMika Westerberg } 1806ace75e18SMika Westerberg requested_bw = ret; 18076ce35635SMika Westerberg 18086ce35635SMika Westerberg tb_port_dbg(in, "requested bandwidth %d Mb/s\n", requested_bw); 18096ce35635SMika Westerberg 18106ce35635SMika Westerberg tunnel = tb_find_tunnel(tb, TB_TUNNEL_DP, in, NULL); 18116ce35635SMika Westerberg if (!tunnel) { 18126ce35635SMika Westerberg tb_port_warn(in, "failed to find tunnel\n"); 18136ce35635SMika Westerberg goto unlock; 18146ce35635SMika Westerberg } 18156ce35635SMika Westerberg 18166ce35635SMika Westerberg out = tunnel->dst_port; 18176ce35635SMika Westerberg 18186ce35635SMika Westerberg if (in->sw->config.depth < out->sw->config.depth) { 18196ce35635SMika Westerberg requested_up = -1; 18206ce35635SMika Westerberg requested_down = requested_bw; 18216ce35635SMika Westerberg } else { 18226ce35635SMika Westerberg requested_up = requested_bw; 18236ce35635SMika Westerberg requested_down = -1; 18246ce35635SMika Westerberg } 18256ce35635SMika Westerberg 18266ce35635SMika Westerberg ret = tb_alloc_dp_bandwidth(tunnel, &requested_up, &requested_down); 18276ce35635SMika Westerberg if (ret) { 18286ce35635SMika Westerberg if (ret == -ENOBUFS) 18296ce35635SMika Westerberg tb_port_warn(in, "not enough bandwidth available\n"); 18306ce35635SMika Westerberg else 18316ce35635SMika Westerberg tb_port_warn(in, "failed to change bandwidth allocation\n"); 18326ce35635SMika Westerberg } else { 18336ce35635SMika Westerberg tb_port_dbg(in, "bandwidth allocation changed to %d/%d Mb/s\n", 18346ce35635SMika Westerberg requested_up, requested_down); 18356ce35635SMika Westerberg 18366ce35635SMika Westerberg /* Update other clients about the allocation change */ 18376ce35635SMika Westerberg tb_recalc_estimated_bandwidth(tb); 18386ce35635SMika Westerberg } 18396ce35635SMika Westerberg 18406ce35635SMika Westerberg unlock: 18416ce35635SMika Westerberg mutex_unlock(&tb->lock); 18426ce35635SMika Westerberg 18436ce35635SMika Westerberg pm_runtime_mark_last_busy(&tb->dev); 18446ce35635SMika Westerberg pm_runtime_put_autosuspend(&tb->dev); 18456ce35635SMika Westerberg } 18466ce35635SMika Westerberg 18476ce35635SMika Westerberg static void tb_queue_dp_bandwidth_request(struct tb *tb, u64 route, u8 port) 18486ce35635SMika Westerberg { 18496ce35635SMika Westerberg struct tb_hotplug_event *ev; 18506ce35635SMika Westerberg 18516ce35635SMika Westerberg ev = kmalloc(sizeof(*ev), GFP_KERNEL); 18526ce35635SMika Westerberg if (!ev) 18536ce35635SMika Westerberg return; 18546ce35635SMika Westerberg 18556ce35635SMika Westerberg ev->tb = tb; 18566ce35635SMika Westerberg ev->route = route; 18576ce35635SMika Westerberg ev->port = port; 18586ce35635SMika Westerberg INIT_WORK(&ev->work, tb_handle_dp_bandwidth_request); 18596ce35635SMika Westerberg queue_work(tb->wq, &ev->work); 18606ce35635SMika Westerberg } 18616ce35635SMika Westerberg 18626ce35635SMika Westerberg static void tb_handle_notification(struct tb *tb, u64 route, 18636ce35635SMika Westerberg const struct cfg_error_pkg *error) 18646ce35635SMika Westerberg { 18656ce35635SMika Westerberg if (tb_cfg_ack_notification(tb->ctl, route, error)) 18666ce35635SMika Westerberg tb_warn(tb, "could not ack notification on %llx\n", route); 18676ce35635SMika Westerberg 18686ce35635SMika Westerberg switch (error->error) { 18696ce35635SMika Westerberg case TB_CFG_ERROR_DP_BW: 18706ce35635SMika Westerberg tb_queue_dp_bandwidth_request(tb, route, error->port); 18716ce35635SMika Westerberg break; 18726ce35635SMika Westerberg 18736ce35635SMika Westerberg default: 18746ce35635SMika Westerberg /* Ack is enough */ 18756ce35635SMika Westerberg return; 18766ce35635SMika Westerberg } 18776ce35635SMika Westerberg } 18786ce35635SMika Westerberg 1879877e50b3SLee Jones /* 1880d6cc51cdSAndreas Noever * tb_schedule_hotplug_handler() - callback function for the control channel 1881d6cc51cdSAndreas Noever * 1882d6cc51cdSAndreas Noever * Delegates to tb_handle_hotplug. 1883d6cc51cdSAndreas Noever */ 188481a54b5eSMika Westerberg static void tb_handle_event(struct tb *tb, enum tb_cfg_pkg_type type, 188581a54b5eSMika Westerberg const void *buf, size_t size) 1886d6cc51cdSAndreas Noever { 188781a54b5eSMika Westerberg const struct cfg_event_pkg *pkg = buf; 18886ce35635SMika Westerberg u64 route = tb_cfg_get_route(&pkg->header); 188981a54b5eSMika Westerberg 18906ce35635SMika Westerberg switch (type) { 18916ce35635SMika Westerberg case TB_CFG_PKG_ERROR: 18926ce35635SMika Westerberg tb_handle_notification(tb, route, (const struct cfg_error_pkg *)buf); 18936ce35635SMika Westerberg return; 18946ce35635SMika Westerberg case TB_CFG_PKG_EVENT: 18956ce35635SMika Westerberg break; 18966ce35635SMika Westerberg default: 189781a54b5eSMika Westerberg tb_warn(tb, "unexpected event %#x, ignoring\n", type); 189881a54b5eSMika Westerberg return; 189981a54b5eSMika Westerberg } 190081a54b5eSMika Westerberg 1901210e9f56SMika Westerberg if (tb_cfg_ack_plug(tb->ctl, route, pkg->port, pkg->unplug)) { 190281a54b5eSMika Westerberg tb_warn(tb, "could not ack plug event on %llx:%x\n", route, 190381a54b5eSMika Westerberg pkg->port); 190481a54b5eSMika Westerberg } 190581a54b5eSMika Westerberg 19064f807e47SMika Westerberg tb_queue_hotplug(tb, route, pkg->port, pkg->unplug); 1907d6cc51cdSAndreas Noever } 1908d6cc51cdSAndreas Noever 19099d3cce0bSMika Westerberg static void tb_stop(struct tb *tb) 1910d6cc51cdSAndreas Noever { 19119d3cce0bSMika Westerberg struct tb_cm *tcm = tb_priv(tb); 191293f36adeSMika Westerberg struct tb_tunnel *tunnel; 191393f36adeSMika Westerberg struct tb_tunnel *n; 19143364f0c1SAndreas Noever 19156ac6faeeSMika Westerberg cancel_delayed_work(&tcm->remove_work); 19163364f0c1SAndreas Noever /* tunnels are only present after everything has been initialized */ 19177ea4cd6bSMika Westerberg list_for_each_entry_safe(tunnel, n, &tcm->tunnel_list, list) { 19187ea4cd6bSMika Westerberg /* 19197ea4cd6bSMika Westerberg * DMA tunnels require the driver to be functional so we 19207ea4cd6bSMika Westerberg * tear them down. Other protocol tunnels can be left 19217ea4cd6bSMika Westerberg * intact. 19227ea4cd6bSMika Westerberg */ 19237ea4cd6bSMika Westerberg if (tb_tunnel_is_dma(tunnel)) 19247ea4cd6bSMika Westerberg tb_tunnel_deactivate(tunnel); 192593f36adeSMika Westerberg tb_tunnel_free(tunnel); 19267ea4cd6bSMika Westerberg } 1927bfe778acSMika Westerberg tb_switch_remove(tb->root_switch); 19289d3cce0bSMika Westerberg tcm->hotplug_active = false; /* signal tb_handle_hotplug to quit */ 1929d6cc51cdSAndreas Noever } 1930d6cc51cdSAndreas Noever 193199cabbb0SMika Westerberg static int tb_scan_finalize_switch(struct device *dev, void *data) 193299cabbb0SMika Westerberg { 193399cabbb0SMika Westerberg if (tb_is_switch(dev)) { 193499cabbb0SMika Westerberg struct tb_switch *sw = tb_to_switch(dev); 193599cabbb0SMika Westerberg 193699cabbb0SMika Westerberg /* 193799cabbb0SMika Westerberg * If we found that the switch was already setup by the 193899cabbb0SMika Westerberg * boot firmware, mark it as authorized now before we 193999cabbb0SMika Westerberg * send uevent to userspace. 194099cabbb0SMika Westerberg */ 194199cabbb0SMika Westerberg if (sw->boot) 194299cabbb0SMika Westerberg sw->authorized = 1; 194399cabbb0SMika Westerberg 194499cabbb0SMika Westerberg dev_set_uevent_suppress(dev, false); 194599cabbb0SMika Westerberg kobject_uevent(&dev->kobj, KOBJ_ADD); 194699cabbb0SMika Westerberg device_for_each_child(dev, NULL, tb_scan_finalize_switch); 194799cabbb0SMika Westerberg } 194899cabbb0SMika Westerberg 194999cabbb0SMika Westerberg return 0; 195099cabbb0SMika Westerberg } 195199cabbb0SMika Westerberg 19529d3cce0bSMika Westerberg static int tb_start(struct tb *tb) 1953d6cc51cdSAndreas Noever { 19549d3cce0bSMika Westerberg struct tb_cm *tcm = tb_priv(tb); 1955bfe778acSMika Westerberg int ret; 1956d6cc51cdSAndreas Noever 1957bfe778acSMika Westerberg tb->root_switch = tb_switch_alloc(tb, &tb->dev, 0); 1958444ac384SMika Westerberg if (IS_ERR(tb->root_switch)) 1959444ac384SMika Westerberg return PTR_ERR(tb->root_switch); 1960a25c8b2fSAndreas Noever 1961e6b245ccSMika Westerberg /* 1962e6b245ccSMika Westerberg * ICM firmware upgrade needs running firmware and in native 1963e6b245ccSMika Westerberg * mode that is not available so disable firmware upgrade of the 1964e6b245ccSMika Westerberg * root switch. 19655172eb9aSSzuying Chen * 19665172eb9aSSzuying Chen * However, USB4 routers support NVM firmware upgrade if they 19675172eb9aSSzuying Chen * implement the necessary router operations. 1968e6b245ccSMika Westerberg */ 19695172eb9aSSzuying Chen tb->root_switch->no_nvm_upgrade = !tb_switch_is_usb4(tb->root_switch); 19706ac6faeeSMika Westerberg /* All USB4 routers support runtime PM */ 19716ac6faeeSMika Westerberg tb->root_switch->rpm = tb_switch_is_usb4(tb->root_switch); 1972e6b245ccSMika Westerberg 1973bfe778acSMika Westerberg ret = tb_switch_configure(tb->root_switch); 1974bfe778acSMika Westerberg if (ret) { 1975bfe778acSMika Westerberg tb_switch_put(tb->root_switch); 1976bfe778acSMika Westerberg return ret; 1977bfe778acSMika Westerberg } 1978bfe778acSMika Westerberg 1979bfe778acSMika Westerberg /* Announce the switch to the world */ 1980bfe778acSMika Westerberg ret = tb_switch_add(tb->root_switch); 1981bfe778acSMika Westerberg if (ret) { 1982bfe778acSMika Westerberg tb_switch_put(tb->root_switch); 1983bfe778acSMika Westerberg return ret; 1984bfe778acSMika Westerberg } 1985bfe778acSMika Westerberg 1986b017a46dSGil Fine /* 1987b017a46dSGil Fine * To support highest CLx state, we set host router's TMU to 1988b017a46dSGil Fine * Normal mode. 1989b017a46dSGil Fine */ 1990b017a46dSGil Fine tb_switch_tmu_configure(tb->root_switch, TB_SWITCH_TMU_RATE_NORMAL, 1991b017a46dSGil Fine false); 1992cf29b9afSRajmohan Mani /* Enable TMU if it is off */ 1993cf29b9afSRajmohan Mani tb_switch_tmu_enable(tb->root_switch); 19949da672a4SAndreas Noever /* Full scan to discover devices added before the driver was loaded. */ 19959da672a4SAndreas Noever tb_scan_switch(tb->root_switch); 19960414bec5SMika Westerberg /* Find out tunnels created by the boot firmware */ 199743bddb26SMika Westerberg tb_discover_tunnels(tb); 1998b60e31bfSSanjay R Mehta /* Add DP resources from the DP tunnels created by the boot firmware */ 1999b60e31bfSSanjay R Mehta tb_discover_dp_resources(tb); 2000e6f81858SRajmohan Mani /* 2001e6f81858SRajmohan Mani * If the boot firmware did not create USB 3.x tunnels create them 2002e6f81858SRajmohan Mani * now for the whole topology. 2003e6f81858SRajmohan Mani */ 2004e6f81858SRajmohan Mani tb_create_usb3_tunnels(tb->root_switch); 20058afe909bSMika Westerberg /* Add DP IN resources for the root switch */ 20068afe909bSMika Westerberg tb_add_dp_resources(tb->root_switch); 200799cabbb0SMika Westerberg /* Make the discovered switches available to the userspace */ 200899cabbb0SMika Westerberg device_for_each_child(&tb->root_switch->dev, NULL, 200999cabbb0SMika Westerberg tb_scan_finalize_switch); 20109da672a4SAndreas Noever 2011d6cc51cdSAndreas Noever /* Allow tb_handle_hotplug to progress events */ 20129d3cce0bSMika Westerberg tcm->hotplug_active = true; 20139d3cce0bSMika Westerberg return 0; 2014d6cc51cdSAndreas Noever } 2015d6cc51cdSAndreas Noever 20169d3cce0bSMika Westerberg static int tb_suspend_noirq(struct tb *tb) 201723dd5bb4SAndreas Noever { 20189d3cce0bSMika Westerberg struct tb_cm *tcm = tb_priv(tb); 20199d3cce0bSMika Westerberg 2020daa5140fSMika Westerberg tb_dbg(tb, "suspending...\n"); 202181a2e3e4SMika Westerberg tb_disconnect_and_release_dp(tb); 20226ac6faeeSMika Westerberg tb_switch_suspend(tb->root_switch, false); 20239d3cce0bSMika Westerberg tcm->hotplug_active = false; /* signal tb_handle_hotplug to quit */ 2024daa5140fSMika Westerberg tb_dbg(tb, "suspend finished\n"); 20259d3cce0bSMika Westerberg 20269d3cce0bSMika Westerberg return 0; 202723dd5bb4SAndreas Noever } 202823dd5bb4SAndreas Noever 202991c0c120SMika Westerberg static void tb_restore_children(struct tb_switch *sw) 203091c0c120SMika Westerberg { 203191c0c120SMika Westerberg struct tb_port *port; 203291c0c120SMika Westerberg 20336ac6faeeSMika Westerberg /* No need to restore if the router is already unplugged */ 20346ac6faeeSMika Westerberg if (sw->is_unplugged) 20356ac6faeeSMika Westerberg return; 20366ac6faeeSMika Westerberg 20371a9b6cb8SMika Westerberg if (tb_enable_clx(sw)) 20381a9b6cb8SMika Westerberg tb_sw_warn(sw, "failed to re-enable CL states\n"); 2039b017a46dSGil Fine 2040cf29b9afSRajmohan Mani if (tb_enable_tmu(sw)) 2041cf29b9afSRajmohan Mani tb_sw_warn(sw, "failed to restore TMU configuration\n"); 2042cf29b9afSRajmohan Mani 204391c0c120SMika Westerberg tb_switch_for_each_port(sw, port) { 2044284652a4SMika Westerberg if (!tb_port_has_remote(port) && !port->xdomain) 204591c0c120SMika Westerberg continue; 204691c0c120SMika Westerberg 2047284652a4SMika Westerberg if (port->remote) { 20482ca3263aSMika Westerberg tb_switch_lane_bonding_enable(port->remote->sw); 2049de462039SMika Westerberg tb_switch_configure_link(port->remote->sw); 205091c0c120SMika Westerberg 205191c0c120SMika Westerberg tb_restore_children(port->remote->sw); 2052284652a4SMika Westerberg } else if (port->xdomain) { 2053f9cad07bSMika Westerberg tb_port_configure_xdomain(port, port->xdomain); 2054284652a4SMika Westerberg } 205591c0c120SMika Westerberg } 205691c0c120SMika Westerberg } 205791c0c120SMika Westerberg 20589d3cce0bSMika Westerberg static int tb_resume_noirq(struct tb *tb) 205923dd5bb4SAndreas Noever { 20609d3cce0bSMika Westerberg struct tb_cm *tcm = tb_priv(tb); 206193f36adeSMika Westerberg struct tb_tunnel *tunnel, *n; 206243bddb26SMika Westerberg unsigned int usb3_delay = 0; 206343bddb26SMika Westerberg LIST_HEAD(tunnels); 20649d3cce0bSMika Westerberg 2065daa5140fSMika Westerberg tb_dbg(tb, "resuming...\n"); 206623dd5bb4SAndreas Noever 206723dd5bb4SAndreas Noever /* remove any pci devices the firmware might have setup */ 2068356b6c4eSMika Westerberg tb_switch_reset(tb->root_switch); 206923dd5bb4SAndreas Noever 207023dd5bb4SAndreas Noever tb_switch_resume(tb->root_switch); 207123dd5bb4SAndreas Noever tb_free_invalid_tunnels(tb); 207223dd5bb4SAndreas Noever tb_free_unplugged_children(tb->root_switch); 207391c0c120SMika Westerberg tb_restore_children(tb->root_switch); 207443bddb26SMika Westerberg 207543bddb26SMika Westerberg /* 207643bddb26SMika Westerberg * If we get here from suspend to disk the boot firmware or the 207743bddb26SMika Westerberg * restore kernel might have created tunnels of its own. Since 207843bddb26SMika Westerberg * we cannot be sure they are usable for us we find and tear 207943bddb26SMika Westerberg * them down. 208043bddb26SMika Westerberg */ 208143bddb26SMika Westerberg tb_switch_discover_tunnels(tb->root_switch, &tunnels, false); 208243bddb26SMika Westerberg list_for_each_entry_safe_reverse(tunnel, n, &tunnels, list) { 208343bddb26SMika Westerberg if (tb_tunnel_is_usb3(tunnel)) 208443bddb26SMika Westerberg usb3_delay = 500; 208543bddb26SMika Westerberg tb_tunnel_deactivate(tunnel); 208643bddb26SMika Westerberg tb_tunnel_free(tunnel); 208743bddb26SMika Westerberg } 208843bddb26SMika Westerberg 208943bddb26SMika Westerberg /* Re-create our tunnels now */ 209043bddb26SMika Westerberg list_for_each_entry_safe(tunnel, n, &tcm->tunnel_list, list) { 209143bddb26SMika Westerberg /* USB3 requires delay before it can be re-activated */ 209243bddb26SMika Westerberg if (tb_tunnel_is_usb3(tunnel)) { 209343bddb26SMika Westerberg msleep(usb3_delay); 209443bddb26SMika Westerberg /* Only need to do it once */ 209543bddb26SMika Westerberg usb3_delay = 0; 209643bddb26SMika Westerberg } 209793f36adeSMika Westerberg tb_tunnel_restart(tunnel); 209843bddb26SMika Westerberg } 20999d3cce0bSMika Westerberg if (!list_empty(&tcm->tunnel_list)) { 210023dd5bb4SAndreas Noever /* 210123dd5bb4SAndreas Noever * the pcie links need some time to get going. 210223dd5bb4SAndreas Noever * 100ms works for me... 210323dd5bb4SAndreas Noever */ 2104daa5140fSMika Westerberg tb_dbg(tb, "tunnels restarted, sleeping for 100ms\n"); 210523dd5bb4SAndreas Noever msleep(100); 210623dd5bb4SAndreas Noever } 210723dd5bb4SAndreas Noever /* Allow tb_handle_hotplug to progress events */ 21089d3cce0bSMika Westerberg tcm->hotplug_active = true; 2109daa5140fSMika Westerberg tb_dbg(tb, "resume finished\n"); 21109d3cce0bSMika Westerberg 21119d3cce0bSMika Westerberg return 0; 21129d3cce0bSMika Westerberg } 21139d3cce0bSMika Westerberg 21147ea4cd6bSMika Westerberg static int tb_free_unplugged_xdomains(struct tb_switch *sw) 21157ea4cd6bSMika Westerberg { 2116b433d010SMika Westerberg struct tb_port *port; 2117b433d010SMika Westerberg int ret = 0; 21187ea4cd6bSMika Westerberg 2119b433d010SMika Westerberg tb_switch_for_each_port(sw, port) { 21207ea4cd6bSMika Westerberg if (tb_is_upstream_port(port)) 21217ea4cd6bSMika Westerberg continue; 21227ea4cd6bSMika Westerberg if (port->xdomain && port->xdomain->is_unplugged) { 2123dacb1287SKranthi Kuntala tb_retimer_remove_all(port); 21247ea4cd6bSMika Westerberg tb_xdomain_remove(port->xdomain); 2125284652a4SMika Westerberg tb_port_unconfigure_xdomain(port); 21267ea4cd6bSMika Westerberg port->xdomain = NULL; 21277ea4cd6bSMika Westerberg ret++; 21287ea4cd6bSMika Westerberg } else if (port->remote) { 21297ea4cd6bSMika Westerberg ret += tb_free_unplugged_xdomains(port->remote->sw); 21307ea4cd6bSMika Westerberg } 21317ea4cd6bSMika Westerberg } 21327ea4cd6bSMika Westerberg 21337ea4cd6bSMika Westerberg return ret; 21347ea4cd6bSMika Westerberg } 21357ea4cd6bSMika Westerberg 2136884e4d57SMika Westerberg static int tb_freeze_noirq(struct tb *tb) 2137884e4d57SMika Westerberg { 2138884e4d57SMika Westerberg struct tb_cm *tcm = tb_priv(tb); 2139884e4d57SMika Westerberg 2140884e4d57SMika Westerberg tcm->hotplug_active = false; 2141884e4d57SMika Westerberg return 0; 2142884e4d57SMika Westerberg } 2143884e4d57SMika Westerberg 2144884e4d57SMika Westerberg static int tb_thaw_noirq(struct tb *tb) 2145884e4d57SMika Westerberg { 2146884e4d57SMika Westerberg struct tb_cm *tcm = tb_priv(tb); 2147884e4d57SMika Westerberg 2148884e4d57SMika Westerberg tcm->hotplug_active = true; 2149884e4d57SMika Westerberg return 0; 2150884e4d57SMika Westerberg } 2151884e4d57SMika Westerberg 21527ea4cd6bSMika Westerberg static void tb_complete(struct tb *tb) 21537ea4cd6bSMika Westerberg { 21547ea4cd6bSMika Westerberg /* 21557ea4cd6bSMika Westerberg * Release any unplugged XDomains and if there is a case where 21567ea4cd6bSMika Westerberg * another domain is swapped in place of unplugged XDomain we 21577ea4cd6bSMika Westerberg * need to run another rescan. 21587ea4cd6bSMika Westerberg */ 21597ea4cd6bSMika Westerberg mutex_lock(&tb->lock); 21607ea4cd6bSMika Westerberg if (tb_free_unplugged_xdomains(tb->root_switch)) 21617ea4cd6bSMika Westerberg tb_scan_switch(tb->root_switch); 21627ea4cd6bSMika Westerberg mutex_unlock(&tb->lock); 21637ea4cd6bSMika Westerberg } 21647ea4cd6bSMika Westerberg 21656ac6faeeSMika Westerberg static int tb_runtime_suspend(struct tb *tb) 21666ac6faeeSMika Westerberg { 21676ac6faeeSMika Westerberg struct tb_cm *tcm = tb_priv(tb); 21686ac6faeeSMika Westerberg 21696ac6faeeSMika Westerberg mutex_lock(&tb->lock); 21706ac6faeeSMika Westerberg tb_switch_suspend(tb->root_switch, true); 21716ac6faeeSMika Westerberg tcm->hotplug_active = false; 21726ac6faeeSMika Westerberg mutex_unlock(&tb->lock); 21736ac6faeeSMika Westerberg 21746ac6faeeSMika Westerberg return 0; 21756ac6faeeSMika Westerberg } 21766ac6faeeSMika Westerberg 21776ac6faeeSMika Westerberg static void tb_remove_work(struct work_struct *work) 21786ac6faeeSMika Westerberg { 21796ac6faeeSMika Westerberg struct tb_cm *tcm = container_of(work, struct tb_cm, remove_work.work); 21806ac6faeeSMika Westerberg struct tb *tb = tcm_to_tb(tcm); 21816ac6faeeSMika Westerberg 21826ac6faeeSMika Westerberg mutex_lock(&tb->lock); 21836ac6faeeSMika Westerberg if (tb->root_switch) { 21846ac6faeeSMika Westerberg tb_free_unplugged_children(tb->root_switch); 21856ac6faeeSMika Westerberg tb_free_unplugged_xdomains(tb->root_switch); 21866ac6faeeSMika Westerberg } 21876ac6faeeSMika Westerberg mutex_unlock(&tb->lock); 21886ac6faeeSMika Westerberg } 21896ac6faeeSMika Westerberg 21906ac6faeeSMika Westerberg static int tb_runtime_resume(struct tb *tb) 21916ac6faeeSMika Westerberg { 21926ac6faeeSMika Westerberg struct tb_cm *tcm = tb_priv(tb); 21936ac6faeeSMika Westerberg struct tb_tunnel *tunnel, *n; 21946ac6faeeSMika Westerberg 21956ac6faeeSMika Westerberg mutex_lock(&tb->lock); 21966ac6faeeSMika Westerberg tb_switch_resume(tb->root_switch); 21976ac6faeeSMika Westerberg tb_free_invalid_tunnels(tb); 21986ac6faeeSMika Westerberg tb_restore_children(tb->root_switch); 21996ac6faeeSMika Westerberg list_for_each_entry_safe(tunnel, n, &tcm->tunnel_list, list) 22006ac6faeeSMika Westerberg tb_tunnel_restart(tunnel); 22016ac6faeeSMika Westerberg tcm->hotplug_active = true; 22026ac6faeeSMika Westerberg mutex_unlock(&tb->lock); 22036ac6faeeSMika Westerberg 22046ac6faeeSMika Westerberg /* 22056ac6faeeSMika Westerberg * Schedule cleanup of any unplugged devices. Run this in a 22066ac6faeeSMika Westerberg * separate thread to avoid possible deadlock if the device 22076ac6faeeSMika Westerberg * removal runtime resumes the unplugged device. 22086ac6faeeSMika Westerberg */ 22096ac6faeeSMika Westerberg queue_delayed_work(tb->wq, &tcm->remove_work, msecs_to_jiffies(50)); 22106ac6faeeSMika Westerberg return 0; 22116ac6faeeSMika Westerberg } 22126ac6faeeSMika Westerberg 22139d3cce0bSMika Westerberg static const struct tb_cm_ops tb_cm_ops = { 22149d3cce0bSMika Westerberg .start = tb_start, 22159d3cce0bSMika Westerberg .stop = tb_stop, 22169d3cce0bSMika Westerberg .suspend_noirq = tb_suspend_noirq, 22179d3cce0bSMika Westerberg .resume_noirq = tb_resume_noirq, 2218884e4d57SMika Westerberg .freeze_noirq = tb_freeze_noirq, 2219884e4d57SMika Westerberg .thaw_noirq = tb_thaw_noirq, 22207ea4cd6bSMika Westerberg .complete = tb_complete, 22216ac6faeeSMika Westerberg .runtime_suspend = tb_runtime_suspend, 22226ac6faeeSMika Westerberg .runtime_resume = tb_runtime_resume, 222381a54b5eSMika Westerberg .handle_event = tb_handle_event, 22243da88be2SMika Westerberg .disapprove_switch = tb_disconnect_pci, 222599cabbb0SMika Westerberg .approve_switch = tb_tunnel_pci, 22267ea4cd6bSMika Westerberg .approve_xdomain_paths = tb_approve_xdomain_paths, 22277ea4cd6bSMika Westerberg .disconnect_xdomain_paths = tb_disconnect_xdomain_paths, 22289d3cce0bSMika Westerberg }; 22299d3cce0bSMika Westerberg 2230349bfe08SMika Westerberg /* 2231349bfe08SMika Westerberg * During suspend the Thunderbolt controller is reset and all PCIe 2232349bfe08SMika Westerberg * tunnels are lost. The NHI driver will try to reestablish all tunnels 2233349bfe08SMika Westerberg * during resume. This adds device links between the tunneled PCIe 2234349bfe08SMika Westerberg * downstream ports and the NHI so that the device core will make sure 2235349bfe08SMika Westerberg * NHI is resumed first before the rest. 2236349bfe08SMika Westerberg */ 2237349bfe08SMika Westerberg static void tb_apple_add_links(struct tb_nhi *nhi) 2238349bfe08SMika Westerberg { 2239349bfe08SMika Westerberg struct pci_dev *upstream, *pdev; 2240349bfe08SMika Westerberg 2241349bfe08SMika Westerberg if (!x86_apple_machine) 2242349bfe08SMika Westerberg return; 2243349bfe08SMika Westerberg 2244349bfe08SMika Westerberg switch (nhi->pdev->device) { 2245349bfe08SMika Westerberg case PCI_DEVICE_ID_INTEL_LIGHT_RIDGE: 2246349bfe08SMika Westerberg case PCI_DEVICE_ID_INTEL_CACTUS_RIDGE_4C: 2247349bfe08SMika Westerberg case PCI_DEVICE_ID_INTEL_FALCON_RIDGE_2C_NHI: 2248349bfe08SMika Westerberg case PCI_DEVICE_ID_INTEL_FALCON_RIDGE_4C_NHI: 2249349bfe08SMika Westerberg break; 2250349bfe08SMika Westerberg default: 2251349bfe08SMika Westerberg return; 2252349bfe08SMika Westerberg } 2253349bfe08SMika Westerberg 2254349bfe08SMika Westerberg upstream = pci_upstream_bridge(nhi->pdev); 2255349bfe08SMika Westerberg while (upstream) { 2256349bfe08SMika Westerberg if (!pci_is_pcie(upstream)) 2257349bfe08SMika Westerberg return; 2258349bfe08SMika Westerberg if (pci_pcie_type(upstream) == PCI_EXP_TYPE_UPSTREAM) 2259349bfe08SMika Westerberg break; 2260349bfe08SMika Westerberg upstream = pci_upstream_bridge(upstream); 2261349bfe08SMika Westerberg } 2262349bfe08SMika Westerberg 2263349bfe08SMika Westerberg if (!upstream) 2264349bfe08SMika Westerberg return; 2265349bfe08SMika Westerberg 2266349bfe08SMika Westerberg /* 2267349bfe08SMika Westerberg * For each hotplug downstream port, create add device link 2268349bfe08SMika Westerberg * back to NHI so that PCIe tunnels can be re-established after 2269349bfe08SMika Westerberg * sleep. 2270349bfe08SMika Westerberg */ 2271349bfe08SMika Westerberg for_each_pci_bridge(pdev, upstream->subordinate) { 2272349bfe08SMika Westerberg const struct device_link *link; 2273349bfe08SMika Westerberg 2274349bfe08SMika Westerberg if (!pci_is_pcie(pdev)) 2275349bfe08SMika Westerberg continue; 2276349bfe08SMika Westerberg if (pci_pcie_type(pdev) != PCI_EXP_TYPE_DOWNSTREAM || 2277349bfe08SMika Westerberg !pdev->is_hotplug_bridge) 2278349bfe08SMika Westerberg continue; 2279349bfe08SMika Westerberg 2280349bfe08SMika Westerberg link = device_link_add(&pdev->dev, &nhi->pdev->dev, 2281349bfe08SMika Westerberg DL_FLAG_AUTOREMOVE_SUPPLIER | 2282349bfe08SMika Westerberg DL_FLAG_PM_RUNTIME); 2283349bfe08SMika Westerberg if (link) { 2284349bfe08SMika Westerberg dev_dbg(&nhi->pdev->dev, "created link from %s\n", 2285349bfe08SMika Westerberg dev_name(&pdev->dev)); 2286349bfe08SMika Westerberg } else { 2287349bfe08SMika Westerberg dev_warn(&nhi->pdev->dev, "device link creation from %s failed\n", 2288349bfe08SMika Westerberg dev_name(&pdev->dev)); 2289349bfe08SMika Westerberg } 2290349bfe08SMika Westerberg } 2291349bfe08SMika Westerberg } 2292349bfe08SMika Westerberg 22939d3cce0bSMika Westerberg struct tb *tb_probe(struct tb_nhi *nhi) 22949d3cce0bSMika Westerberg { 22959d3cce0bSMika Westerberg struct tb_cm *tcm; 22969d3cce0bSMika Westerberg struct tb *tb; 22979d3cce0bSMika Westerberg 22987f0a34d7SMika Westerberg tb = tb_domain_alloc(nhi, TB_TIMEOUT, sizeof(*tcm)); 22999d3cce0bSMika Westerberg if (!tb) 23009d3cce0bSMika Westerberg return NULL; 23019d3cce0bSMika Westerberg 2302c6da62a2SMika Westerberg if (tb_acpi_may_tunnel_pcie()) 230399cabbb0SMika Westerberg tb->security_level = TB_SECURITY_USER; 2304c6da62a2SMika Westerberg else 2305c6da62a2SMika Westerberg tb->security_level = TB_SECURITY_NOPCIE; 2306c6da62a2SMika Westerberg 23079d3cce0bSMika Westerberg tb->cm_ops = &tb_cm_ops; 23089d3cce0bSMika Westerberg 23099d3cce0bSMika Westerberg tcm = tb_priv(tb); 23109d3cce0bSMika Westerberg INIT_LIST_HEAD(&tcm->tunnel_list); 23118afe909bSMika Westerberg INIT_LIST_HEAD(&tcm->dp_resources); 23126ac6faeeSMika Westerberg INIT_DELAYED_WORK(&tcm->remove_work, tb_remove_work); 23136ce35635SMika Westerberg tb_init_bandwidth_groups(tcm); 23149d3cce0bSMika Westerberg 2315e0258805SMika Westerberg tb_dbg(tb, "using software connection manager\n"); 2316e0258805SMika Westerberg 2317349bfe08SMika Westerberg tb_apple_add_links(nhi); 2318349bfe08SMika Westerberg tb_acpi_add_links(nhi); 2319349bfe08SMika Westerberg 23209d3cce0bSMika Westerberg return tb; 232123dd5bb4SAndreas Noever } 2322