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 /* 248*9650de73SMika Westerberg * Currently only enable CLx for the first link. This is enough 249*9650de73SMika Westerberg * to allow the CPU to save energy at least on Intel hardware 250*9650de73SMika Westerberg * and makes it slightly simpler to implement. We may change 251*9650de73SMika Westerberg * this in the future to cover the whole topology if it turns 252*9650de73SMika Westerberg * out to be beneficial. 253*9650de73SMika Westerberg */ 254*9650de73SMika Westerberg if (sw->config.depth != 1) 255*9650de73SMika Westerberg return 0; 256*9650de73SMika Westerberg 257*9650de73SMika Westerberg /* 2581a9b6cb8SMika Westerberg * CL0s and CL1 are enabled and supported together. 2591a9b6cb8SMika Westerberg * Silently ignore CLx enabling in case CLx is not supported. 2601a9b6cb8SMika Westerberg */ 26135627353SMika Westerberg ret = tb_switch_clx_enable(sw, TB_CL0S | TB_CL1); 2621a9b6cb8SMika Westerberg return ret == -EOPNOTSUPP ? 0 : ret; 2631a9b6cb8SMika Westerberg } 2641a9b6cb8SMika Westerberg 2657d283f41SMika Westerberg static int tb_increase_switch_tmu_accuracy(struct device *dev, void *data) 2667d283f41SMika Westerberg { 2677d283f41SMika Westerberg struct tb_switch *sw; 2687d283f41SMika Westerberg 2697d283f41SMika Westerberg sw = tb_to_switch(dev); 2707d283f41SMika Westerberg if (sw) { 2717d283f41SMika Westerberg tb_switch_tmu_configure(sw, TB_SWITCH_TMU_RATE_HIFI, 27212a14f2fSMika Westerberg tb_switch_clx_is_enabled(sw, TB_CL1)); 2737d283f41SMika Westerberg if (tb_switch_tmu_enable(sw)) 2747d283f41SMika Westerberg tb_sw_warn(sw, "failed to increase TMU rate\n"); 2757d283f41SMika Westerberg } 2767d283f41SMika Westerberg 2777d283f41SMika Westerberg return 0; 2787d283f41SMika Westerberg } 2797d283f41SMika Westerberg 2807d283f41SMika Westerberg static void tb_increase_tmu_accuracy(struct tb_tunnel *tunnel) 2817d283f41SMika Westerberg { 2827d283f41SMika Westerberg struct tb_switch *sw; 2837d283f41SMika Westerberg 2847d283f41SMika Westerberg if (!tunnel) 2857d283f41SMika Westerberg return; 2867d283f41SMika Westerberg 2877d283f41SMika Westerberg /* 2887d283f41SMika Westerberg * Once first DP tunnel is established we change the TMU 2897d283f41SMika Westerberg * accuracy of first depth child routers (and the host router) 2907d283f41SMika Westerberg * to the highest. This is needed for the DP tunneling to work 2917d283f41SMika Westerberg * but also allows CL0s. 2927d283f41SMika Westerberg */ 2937d283f41SMika Westerberg sw = tunnel->tb->root_switch; 2947d283f41SMika Westerberg device_for_each_child(&sw->dev, NULL, tb_increase_switch_tmu_accuracy); 2957d283f41SMika Westerberg } 2967d283f41SMika Westerberg 2974e7b4955SMika Westerberg static int tb_enable_tmu(struct tb_switch *sw) 2984e7b4955SMika Westerberg { 2994e7b4955SMika Westerberg int ret; 3004e7b4955SMika Westerberg 3014e7b4955SMika Westerberg /* 3024e7b4955SMika Westerberg * If CL1 is enabled then we need to configure the TMU accuracy 3034e7b4955SMika Westerberg * level to normal. Otherwise we keep the TMU running at the 3044e7b4955SMika Westerberg * highest accuracy. 3054e7b4955SMika Westerberg */ 30612a14f2fSMika Westerberg if (tb_switch_clx_is_enabled(sw, TB_CL1)) 307ef34add8SMika Westerberg ret = tb_switch_tmu_configure(sw, TB_SWITCH_TMU_RATE_NORMAL, true); 3084e7b4955SMika Westerberg else 309ef34add8SMika Westerberg ret = tb_switch_tmu_configure(sw, TB_SWITCH_TMU_RATE_HIFI, false); 310ef34add8SMika Westerberg if (ret) 311ef34add8SMika Westerberg return ret; 3124e7b4955SMika Westerberg 3134e7b4955SMika Westerberg /* If it is already enabled in correct mode, don't touch it */ 3144e7b4955SMika Westerberg if (tb_switch_tmu_is_enabled(sw)) 3154e7b4955SMika Westerberg return 0; 3164e7b4955SMika Westerberg 3174e7b4955SMika Westerberg ret = tb_switch_tmu_disable(sw); 3184e7b4955SMika Westerberg if (ret) 3194e7b4955SMika Westerberg return ret; 3204e7b4955SMika Westerberg 3214e7b4955SMika Westerberg ret = tb_switch_tmu_post_time(sw); 3224e7b4955SMika Westerberg if (ret) 3234e7b4955SMika Westerberg return ret; 3244e7b4955SMika Westerberg 3254e7b4955SMika Westerberg return tb_switch_tmu_enable(sw); 3264e7b4955SMika Westerberg } 3274e7b4955SMika Westerberg 32843bddb26SMika Westerberg static void tb_switch_discover_tunnels(struct tb_switch *sw, 32943bddb26SMika Westerberg struct list_head *list, 33043bddb26SMika Westerberg bool alloc_hopids) 3310414bec5SMika Westerberg { 3320414bec5SMika Westerberg struct tb *tb = sw->tb; 3330414bec5SMika Westerberg struct tb_port *port; 3340414bec5SMika Westerberg 335b433d010SMika Westerberg tb_switch_for_each_port(sw, port) { 3360414bec5SMika Westerberg struct tb_tunnel *tunnel = NULL; 3370414bec5SMika Westerberg 3380414bec5SMika Westerberg switch (port->config.type) { 3394f807e47SMika Westerberg case TB_TYPE_DP_HDMI_IN: 34043bddb26SMika Westerberg tunnel = tb_tunnel_discover_dp(tb, port, alloc_hopids); 3417d283f41SMika Westerberg tb_increase_tmu_accuracy(tunnel); 3424f807e47SMika Westerberg break; 3434f807e47SMika Westerberg 3440414bec5SMika Westerberg case TB_TYPE_PCIE_DOWN: 34543bddb26SMika Westerberg tunnel = tb_tunnel_discover_pci(tb, port, alloc_hopids); 3460414bec5SMika Westerberg break; 3470414bec5SMika Westerberg 348e6f81858SRajmohan Mani case TB_TYPE_USB3_DOWN: 34943bddb26SMika Westerberg tunnel = tb_tunnel_discover_usb3(tb, port, alloc_hopids); 350e6f81858SRajmohan Mani break; 351e6f81858SRajmohan Mani 3520414bec5SMika Westerberg default: 3530414bec5SMika Westerberg break; 3540414bec5SMika Westerberg } 3550414bec5SMika Westerberg 35643bddb26SMika Westerberg if (tunnel) 35743bddb26SMika Westerberg list_add_tail(&tunnel->list, list); 35843bddb26SMika Westerberg } 3594f807e47SMika Westerberg 36043bddb26SMika Westerberg tb_switch_for_each_port(sw, port) { 36143bddb26SMika Westerberg if (tb_port_has_remote(port)) { 36243bddb26SMika Westerberg tb_switch_discover_tunnels(port->remote->sw, list, 36343bddb26SMika Westerberg alloc_hopids); 36443bddb26SMika Westerberg } 36543bddb26SMika Westerberg } 36643bddb26SMika Westerberg } 36743bddb26SMika Westerberg 36843bddb26SMika Westerberg static void tb_discover_tunnels(struct tb *tb) 36943bddb26SMika Westerberg { 37043bddb26SMika Westerberg struct tb_cm *tcm = tb_priv(tb); 37143bddb26SMika Westerberg struct tb_tunnel *tunnel; 37243bddb26SMika Westerberg 37343bddb26SMika Westerberg tb_switch_discover_tunnels(tb->root_switch, &tcm->tunnel_list, true); 37443bddb26SMika Westerberg 37543bddb26SMika Westerberg list_for_each_entry(tunnel, &tcm->tunnel_list, list) { 3764f807e47SMika Westerberg if (tb_tunnel_is_pci(tunnel)) { 3770414bec5SMika Westerberg struct tb_switch *parent = tunnel->dst_port->sw; 3780414bec5SMika Westerberg 3790414bec5SMika Westerberg while (parent != tunnel->src_port->sw) { 3800414bec5SMika Westerberg parent->boot = true; 3810414bec5SMika Westerberg parent = tb_switch_parent(parent); 3820414bec5SMika Westerberg } 383c94732bdSMika Westerberg } else if (tb_tunnel_is_dp(tunnel)) { 3846ce35635SMika Westerberg struct tb_port *in = tunnel->src_port; 3856ce35635SMika Westerberg struct tb_port *out = tunnel->dst_port; 3866ce35635SMika Westerberg 387c94732bdSMika Westerberg /* Keep the domain from powering down */ 3886ce35635SMika Westerberg pm_runtime_get_sync(&in->sw->dev); 3896ce35635SMika Westerberg pm_runtime_get_sync(&out->sw->dev); 3906ce35635SMika Westerberg 3916ce35635SMika Westerberg tb_discover_bandwidth_group(tcm, in, out); 3924f807e47SMika Westerberg } 3930414bec5SMika Westerberg } 3940414bec5SMika Westerberg } 3959da672a4SAndreas Noever 396f9cad07bSMika Westerberg static int tb_port_configure_xdomain(struct tb_port *port, struct tb_xdomain *xd) 397284652a4SMika Westerberg { 398284652a4SMika Westerberg if (tb_switch_is_usb4(port->sw)) 399f9cad07bSMika Westerberg return usb4_port_configure_xdomain(port, xd); 400284652a4SMika Westerberg return tb_lc_configure_xdomain(port); 401284652a4SMika Westerberg } 402284652a4SMika Westerberg 403284652a4SMika Westerberg static void tb_port_unconfigure_xdomain(struct tb_port *port) 404284652a4SMika Westerberg { 405284652a4SMika Westerberg if (tb_switch_is_usb4(port->sw)) 406284652a4SMika Westerberg usb4_port_unconfigure_xdomain(port); 407284652a4SMika Westerberg else 408284652a4SMika Westerberg tb_lc_unconfigure_xdomain(port); 409341d4518SMika Westerberg 410341d4518SMika Westerberg tb_port_enable(port->dual_link_port); 411284652a4SMika Westerberg } 412284652a4SMika Westerberg 4137ea4cd6bSMika Westerberg static void tb_scan_xdomain(struct tb_port *port) 4147ea4cd6bSMika Westerberg { 4157ea4cd6bSMika Westerberg struct tb_switch *sw = port->sw; 4167ea4cd6bSMika Westerberg struct tb *tb = sw->tb; 4177ea4cd6bSMika Westerberg struct tb_xdomain *xd; 4187ea4cd6bSMika Westerberg u64 route; 4197ea4cd6bSMika Westerberg 4205ca67688SMika Westerberg if (!tb_is_xdomain_enabled()) 4215ca67688SMika Westerberg return; 4225ca67688SMika Westerberg 4237ea4cd6bSMika Westerberg route = tb_downstream_route(port); 4247ea4cd6bSMika Westerberg xd = tb_xdomain_find_by_route(tb, route); 4257ea4cd6bSMika Westerberg if (xd) { 4267ea4cd6bSMika Westerberg tb_xdomain_put(xd); 4277ea4cd6bSMika Westerberg return; 4287ea4cd6bSMika Westerberg } 4297ea4cd6bSMika Westerberg 4307ea4cd6bSMika Westerberg xd = tb_xdomain_alloc(tb, &sw->dev, route, tb->root_switch->uuid, 4317ea4cd6bSMika Westerberg NULL); 4327ea4cd6bSMika Westerberg if (xd) { 4337ea4cd6bSMika Westerberg tb_port_at(route, sw)->xdomain = xd; 434f9cad07bSMika Westerberg tb_port_configure_xdomain(port, xd); 4357ea4cd6bSMika Westerberg tb_xdomain_add(xd); 4367ea4cd6bSMika Westerberg } 4377ea4cd6bSMika Westerberg } 4387ea4cd6bSMika Westerberg 439e6f81858SRajmohan Mani /** 440e6f81858SRajmohan Mani * tb_find_unused_port() - return the first inactive port on @sw 441e6f81858SRajmohan Mani * @sw: Switch to find the port on 442e6f81858SRajmohan Mani * @type: Port type to look for 443e6f81858SRajmohan Mani */ 444e6f81858SRajmohan Mani static struct tb_port *tb_find_unused_port(struct tb_switch *sw, 445e6f81858SRajmohan Mani enum tb_port_type type) 446e6f81858SRajmohan Mani { 447e6f81858SRajmohan Mani struct tb_port *port; 448e6f81858SRajmohan Mani 449e6f81858SRajmohan Mani tb_switch_for_each_port(sw, port) { 450e6f81858SRajmohan Mani if (tb_is_upstream_port(port)) 451e6f81858SRajmohan Mani continue; 452e6f81858SRajmohan Mani if (port->config.type != type) 453e6f81858SRajmohan Mani continue; 454e6f81858SRajmohan Mani if (!port->cap_adap) 455e6f81858SRajmohan Mani continue; 456e6f81858SRajmohan Mani if (tb_port_is_enabled(port)) 457e6f81858SRajmohan Mani continue; 458e6f81858SRajmohan Mani return port; 459e6f81858SRajmohan Mani } 460e6f81858SRajmohan Mani return NULL; 461e6f81858SRajmohan Mani } 462e6f81858SRajmohan Mani 463e6f81858SRajmohan Mani static struct tb_port *tb_find_usb3_down(struct tb_switch *sw, 464e6f81858SRajmohan Mani const struct tb_port *port) 465e6f81858SRajmohan Mani { 466e6f81858SRajmohan Mani struct tb_port *down; 467e6f81858SRajmohan Mani 468e6f81858SRajmohan Mani down = usb4_switch_map_usb3_down(sw, port); 46977cfa40fSMika Westerberg if (down && !tb_usb3_port_is_enabled(down)) 470e6f81858SRajmohan Mani return down; 47177cfa40fSMika Westerberg return NULL; 472e6f81858SRajmohan Mani } 473e6f81858SRajmohan Mani 4740bd680cdSMika Westerberg static struct tb_tunnel *tb_find_tunnel(struct tb *tb, enum tb_tunnel_type type, 4750bd680cdSMika Westerberg struct tb_port *src_port, 4760bd680cdSMika Westerberg struct tb_port *dst_port) 4770bd680cdSMika Westerberg { 4780bd680cdSMika Westerberg struct tb_cm *tcm = tb_priv(tb); 4790bd680cdSMika Westerberg struct tb_tunnel *tunnel; 4800bd680cdSMika Westerberg 4810bd680cdSMika Westerberg list_for_each_entry(tunnel, &tcm->tunnel_list, list) { 4820bd680cdSMika Westerberg if (tunnel->type == type && 4830bd680cdSMika Westerberg ((src_port && src_port == tunnel->src_port) || 4840bd680cdSMika Westerberg (dst_port && dst_port == tunnel->dst_port))) { 4850bd680cdSMika Westerberg return tunnel; 4860bd680cdSMika Westerberg } 4870bd680cdSMika Westerberg } 4880bd680cdSMika Westerberg 4890bd680cdSMika Westerberg return NULL; 4900bd680cdSMika Westerberg } 4910bd680cdSMika Westerberg 4920bd680cdSMika Westerberg static struct tb_tunnel *tb_find_first_usb3_tunnel(struct tb *tb, 4930bd680cdSMika Westerberg struct tb_port *src_port, 4940bd680cdSMika Westerberg struct tb_port *dst_port) 4950bd680cdSMika Westerberg { 4960bd680cdSMika Westerberg struct tb_port *port, *usb3_down; 4970bd680cdSMika Westerberg struct tb_switch *sw; 4980bd680cdSMika Westerberg 4990bd680cdSMika Westerberg /* Pick the router that is deepest in the topology */ 5000bd680cdSMika Westerberg if (dst_port->sw->config.depth > src_port->sw->config.depth) 5010bd680cdSMika Westerberg sw = dst_port->sw; 5020bd680cdSMika Westerberg else 5030bd680cdSMika Westerberg sw = src_port->sw; 5040bd680cdSMika Westerberg 5050bd680cdSMika Westerberg /* Can't be the host router */ 5060bd680cdSMika Westerberg if (sw == tb->root_switch) 5070bd680cdSMika Westerberg return NULL; 5080bd680cdSMika Westerberg 5090bd680cdSMika Westerberg /* Find the downstream USB4 port that leads to this router */ 5100bd680cdSMika Westerberg port = tb_port_at(tb_route(sw), tb->root_switch); 5110bd680cdSMika Westerberg /* Find the corresponding host router USB3 downstream port */ 5120bd680cdSMika Westerberg usb3_down = usb4_switch_map_usb3_down(tb->root_switch, port); 5130bd680cdSMika Westerberg if (!usb3_down) 5140bd680cdSMika Westerberg return NULL; 5150bd680cdSMika Westerberg 5160bd680cdSMika Westerberg return tb_find_tunnel(tb, TB_TUNNEL_USB3, usb3_down, NULL); 5170bd680cdSMika Westerberg } 5180bd680cdSMika Westerberg 5190bd680cdSMika Westerberg static int tb_available_bandwidth(struct tb *tb, struct tb_port *src_port, 5200bd680cdSMika Westerberg struct tb_port *dst_port, int *available_up, int *available_down) 5210bd680cdSMika Westerberg { 5220bd680cdSMika Westerberg int usb3_consumed_up, usb3_consumed_down, ret; 5230bd680cdSMika Westerberg struct tb_cm *tcm = tb_priv(tb); 5240bd680cdSMika Westerberg struct tb_tunnel *tunnel; 5250bd680cdSMika Westerberg struct tb_port *port; 5260bd680cdSMika Westerberg 5272426fdf7SMika Westerberg tb_dbg(tb, "calculating available bandwidth between %llx:%u <-> %llx:%u\n", 5282426fdf7SMika Westerberg tb_route(src_port->sw), src_port->port, tb_route(dst_port->sw), 5292426fdf7SMika Westerberg dst_port->port); 5300bd680cdSMika Westerberg 5310bd680cdSMika Westerberg tunnel = tb_find_first_usb3_tunnel(tb, src_port, dst_port); 5326ce35635SMika Westerberg if (tunnel && tunnel->src_port != src_port && 5336ce35635SMika Westerberg tunnel->dst_port != dst_port) { 5340bd680cdSMika Westerberg ret = tb_tunnel_consumed_bandwidth(tunnel, &usb3_consumed_up, 5350bd680cdSMika Westerberg &usb3_consumed_down); 5360bd680cdSMika Westerberg if (ret) 5370bd680cdSMika Westerberg return ret; 5380bd680cdSMika Westerberg } else { 5390bd680cdSMika Westerberg usb3_consumed_up = 0; 5400bd680cdSMika Westerberg usb3_consumed_down = 0; 5410bd680cdSMika Westerberg } 5420bd680cdSMika Westerberg 5430bd680cdSMika Westerberg *available_up = *available_down = 40000; 5440bd680cdSMika Westerberg 5450bd680cdSMika Westerberg /* Find the minimum available bandwidth over all links */ 5460bd680cdSMika Westerberg tb_for_each_port_on_path(src_port, dst_port, port) { 5470bd680cdSMika Westerberg int link_speed, link_width, up_bw, down_bw; 5480bd680cdSMika Westerberg 5490bd680cdSMika Westerberg if (!tb_port_is_null(port)) 5500bd680cdSMika Westerberg continue; 5510bd680cdSMika Westerberg 5520bd680cdSMika Westerberg if (tb_is_upstream_port(port)) { 5530bd680cdSMika Westerberg link_speed = port->sw->link_speed; 5540bd680cdSMika Westerberg } else { 5550bd680cdSMika Westerberg link_speed = tb_port_get_link_speed(port); 5560bd680cdSMika Westerberg if (link_speed < 0) 5570bd680cdSMika Westerberg return link_speed; 5580bd680cdSMika Westerberg } 5590bd680cdSMika Westerberg 5600bd680cdSMika Westerberg link_width = port->bonded ? 2 : 1; 5610bd680cdSMika Westerberg 5620bd680cdSMika Westerberg up_bw = link_speed * link_width * 1000; /* Mb/s */ 5630bd680cdSMika Westerberg /* Leave 10% guard band */ 5640bd680cdSMika Westerberg up_bw -= up_bw / 10; 5650bd680cdSMika Westerberg down_bw = up_bw; 5660bd680cdSMika Westerberg 5672426fdf7SMika Westerberg tb_port_dbg(port, "link total bandwidth %d/%d Mb/s\n", up_bw, 5682426fdf7SMika Westerberg down_bw); 5690bd680cdSMika Westerberg 5700bd680cdSMika Westerberg /* 5710bd680cdSMika Westerberg * Find all DP tunnels that cross the port and reduce 5720bd680cdSMika Westerberg * their consumed bandwidth from the available. 5730bd680cdSMika Westerberg */ 5740bd680cdSMika Westerberg list_for_each_entry(tunnel, &tcm->tunnel_list, list) { 5750bd680cdSMika Westerberg int dp_consumed_up, dp_consumed_down; 5760bd680cdSMika Westerberg 5776ce35635SMika Westerberg if (tb_tunnel_is_invalid(tunnel)) 5786ce35635SMika Westerberg continue; 5796ce35635SMika Westerberg 5800bd680cdSMika Westerberg if (!tb_tunnel_is_dp(tunnel)) 5810bd680cdSMika Westerberg continue; 5820bd680cdSMika Westerberg 5830bd680cdSMika Westerberg if (!tb_tunnel_port_on_path(tunnel, port)) 5840bd680cdSMika Westerberg continue; 5850bd680cdSMika Westerberg 5866ce35635SMika Westerberg /* 5876ce35635SMika Westerberg * Ignore the DP tunnel between src_port and 5886ce35635SMika Westerberg * dst_port because it is the same tunnel and we 5896ce35635SMika Westerberg * may be re-calculating estimated bandwidth. 5906ce35635SMika Westerberg */ 5916ce35635SMika Westerberg if (tunnel->src_port == src_port && 5926ce35635SMika Westerberg tunnel->dst_port == dst_port) 5936ce35635SMika Westerberg continue; 5946ce35635SMika Westerberg 5950bd680cdSMika Westerberg ret = tb_tunnel_consumed_bandwidth(tunnel, 5960bd680cdSMika Westerberg &dp_consumed_up, 5970bd680cdSMika Westerberg &dp_consumed_down); 5980bd680cdSMika Westerberg if (ret) 5990bd680cdSMika Westerberg return ret; 6000bd680cdSMika Westerberg 6010bd680cdSMika Westerberg up_bw -= dp_consumed_up; 6020bd680cdSMika Westerberg down_bw -= dp_consumed_down; 6030bd680cdSMika Westerberg } 6040bd680cdSMika Westerberg 6050bd680cdSMika Westerberg /* 6060bd680cdSMika Westerberg * If USB3 is tunneled from the host router down to the 6070bd680cdSMika Westerberg * branch leading to port we need to take USB3 consumed 6080bd680cdSMika Westerberg * bandwidth into account regardless whether it actually 6090bd680cdSMika Westerberg * crosses the port. 6100bd680cdSMika Westerberg */ 6110bd680cdSMika Westerberg up_bw -= usb3_consumed_up; 6120bd680cdSMika Westerberg down_bw -= usb3_consumed_down; 6130bd680cdSMika Westerberg 6140bd680cdSMika Westerberg if (up_bw < *available_up) 6150bd680cdSMika Westerberg *available_up = up_bw; 6160bd680cdSMika Westerberg if (down_bw < *available_down) 6170bd680cdSMika Westerberg *available_down = down_bw; 6180bd680cdSMika Westerberg } 6190bd680cdSMika Westerberg 6200bd680cdSMika Westerberg if (*available_up < 0) 6210bd680cdSMika Westerberg *available_up = 0; 6220bd680cdSMika Westerberg if (*available_down < 0) 6230bd680cdSMika Westerberg *available_down = 0; 6240bd680cdSMika Westerberg 6250bd680cdSMika Westerberg return 0; 6260bd680cdSMika Westerberg } 6270bd680cdSMika Westerberg 6280bd680cdSMika Westerberg static int tb_release_unused_usb3_bandwidth(struct tb *tb, 6290bd680cdSMika Westerberg struct tb_port *src_port, 6300bd680cdSMika Westerberg struct tb_port *dst_port) 6310bd680cdSMika Westerberg { 6320bd680cdSMika Westerberg struct tb_tunnel *tunnel; 6330bd680cdSMika Westerberg 6340bd680cdSMika Westerberg tunnel = tb_find_first_usb3_tunnel(tb, src_port, dst_port); 6350bd680cdSMika Westerberg return tunnel ? tb_tunnel_release_unused_bandwidth(tunnel) : 0; 6360bd680cdSMika Westerberg } 6370bd680cdSMika Westerberg 6380bd680cdSMika Westerberg static void tb_reclaim_usb3_bandwidth(struct tb *tb, struct tb_port *src_port, 6390bd680cdSMika Westerberg struct tb_port *dst_port) 6400bd680cdSMika Westerberg { 6410bd680cdSMika Westerberg int ret, available_up, available_down; 6420bd680cdSMika Westerberg struct tb_tunnel *tunnel; 6430bd680cdSMika Westerberg 6440bd680cdSMika Westerberg tunnel = tb_find_first_usb3_tunnel(tb, src_port, dst_port); 6450bd680cdSMika Westerberg if (!tunnel) 6460bd680cdSMika Westerberg return; 6470bd680cdSMika Westerberg 6480bd680cdSMika Westerberg tb_dbg(tb, "reclaiming unused bandwidth for USB3\n"); 6490bd680cdSMika Westerberg 6500bd680cdSMika Westerberg /* 6510bd680cdSMika Westerberg * Calculate available bandwidth for the first hop USB3 tunnel. 6520bd680cdSMika Westerberg * That determines the whole USB3 bandwidth for this branch. 6530bd680cdSMika Westerberg */ 6540bd680cdSMika Westerberg ret = tb_available_bandwidth(tb, tunnel->src_port, tunnel->dst_port, 6550bd680cdSMika Westerberg &available_up, &available_down); 6560bd680cdSMika Westerberg if (ret) { 6570bd680cdSMika Westerberg tb_warn(tb, "failed to calculate available bandwidth\n"); 6580bd680cdSMika Westerberg return; 6590bd680cdSMika Westerberg } 6600bd680cdSMika Westerberg 6610bd680cdSMika Westerberg tb_dbg(tb, "available bandwidth for USB3 %d/%d Mb/s\n", 6620bd680cdSMika Westerberg available_up, available_down); 6630bd680cdSMika Westerberg 6640bd680cdSMika Westerberg tb_tunnel_reclaim_available_bandwidth(tunnel, &available_up, &available_down); 6650bd680cdSMika Westerberg } 6660bd680cdSMika Westerberg 667e6f81858SRajmohan Mani static int tb_tunnel_usb3(struct tb *tb, struct tb_switch *sw) 668e6f81858SRajmohan Mani { 669e6f81858SRajmohan Mani struct tb_switch *parent = tb_switch_parent(sw); 6700bd680cdSMika Westerberg int ret, available_up, available_down; 671e6f81858SRajmohan Mani struct tb_port *up, *down, *port; 672e6f81858SRajmohan Mani struct tb_cm *tcm = tb_priv(tb); 673e6f81858SRajmohan Mani struct tb_tunnel *tunnel; 674e6f81858SRajmohan Mani 675c6da62a2SMika Westerberg if (!tb_acpi_may_tunnel_usb3()) { 676c6da62a2SMika Westerberg tb_dbg(tb, "USB3 tunneling disabled, not creating tunnel\n"); 677c6da62a2SMika Westerberg return 0; 678c6da62a2SMika Westerberg } 679c6da62a2SMika Westerberg 680e6f81858SRajmohan Mani up = tb_switch_find_port(sw, TB_TYPE_USB3_UP); 681e6f81858SRajmohan Mani if (!up) 682e6f81858SRajmohan Mani return 0; 683e6f81858SRajmohan Mani 684bbcf40b3SMika Westerberg if (!sw->link_usb4) 685bbcf40b3SMika Westerberg return 0; 686bbcf40b3SMika Westerberg 687e6f81858SRajmohan Mani /* 688e6f81858SRajmohan Mani * Look up available down port. Since we are chaining it should 689e6f81858SRajmohan Mani * be found right above this switch. 690e6f81858SRajmohan Mani */ 6917ce54221SGil Fine port = tb_switch_downstream_port(sw); 692e6f81858SRajmohan Mani down = tb_find_usb3_down(parent, port); 693e6f81858SRajmohan Mani if (!down) 694e6f81858SRajmohan Mani return 0; 695e6f81858SRajmohan Mani 696e6f81858SRajmohan Mani if (tb_route(parent)) { 697e6f81858SRajmohan Mani struct tb_port *parent_up; 698e6f81858SRajmohan Mani /* 699e6f81858SRajmohan Mani * Check first that the parent switch has its upstream USB3 700e6f81858SRajmohan Mani * port enabled. Otherwise the chain is not complete and 701e6f81858SRajmohan Mani * there is no point setting up a new tunnel. 702e6f81858SRajmohan Mani */ 703e6f81858SRajmohan Mani parent_up = tb_switch_find_port(parent, TB_TYPE_USB3_UP); 704e6f81858SRajmohan Mani if (!parent_up || !tb_port_is_enabled(parent_up)) 705e6f81858SRajmohan Mani return 0; 7060bd680cdSMika Westerberg 7070bd680cdSMika Westerberg /* Make all unused bandwidth available for the new tunnel */ 7080bd680cdSMika Westerberg ret = tb_release_unused_usb3_bandwidth(tb, down, up); 7090bd680cdSMika Westerberg if (ret) 7100bd680cdSMika Westerberg return ret; 711e6f81858SRajmohan Mani } 712e6f81858SRajmohan Mani 7130bd680cdSMika Westerberg ret = tb_available_bandwidth(tb, down, up, &available_up, 7140bd680cdSMika Westerberg &available_down); 7150bd680cdSMika Westerberg if (ret) 7160bd680cdSMika Westerberg goto err_reclaim; 7170bd680cdSMika Westerberg 7180bd680cdSMika Westerberg tb_port_dbg(up, "available bandwidth for new USB3 tunnel %d/%d Mb/s\n", 7190bd680cdSMika Westerberg available_up, available_down); 7200bd680cdSMika Westerberg 7210bd680cdSMika Westerberg tunnel = tb_tunnel_alloc_usb3(tb, up, down, available_up, 7220bd680cdSMika Westerberg available_down); 7230bd680cdSMika Westerberg if (!tunnel) { 7240bd680cdSMika Westerberg ret = -ENOMEM; 7250bd680cdSMika Westerberg goto err_reclaim; 7260bd680cdSMika Westerberg } 727e6f81858SRajmohan Mani 728e6f81858SRajmohan Mani if (tb_tunnel_activate(tunnel)) { 729e6f81858SRajmohan Mani tb_port_info(up, 730e6f81858SRajmohan Mani "USB3 tunnel activation failed, aborting\n"); 7310bd680cdSMika Westerberg ret = -EIO; 7320bd680cdSMika Westerberg goto err_free; 733e6f81858SRajmohan Mani } 734e6f81858SRajmohan Mani 735e6f81858SRajmohan Mani list_add_tail(&tunnel->list, &tcm->tunnel_list); 7360bd680cdSMika Westerberg if (tb_route(parent)) 7370bd680cdSMika Westerberg tb_reclaim_usb3_bandwidth(tb, down, up); 7380bd680cdSMika Westerberg 739e6f81858SRajmohan Mani return 0; 7400bd680cdSMika Westerberg 7410bd680cdSMika Westerberg err_free: 7420bd680cdSMika Westerberg tb_tunnel_free(tunnel); 7430bd680cdSMika Westerberg err_reclaim: 7440bd680cdSMika Westerberg if (tb_route(parent)) 7450bd680cdSMika Westerberg tb_reclaim_usb3_bandwidth(tb, down, up); 7460bd680cdSMika Westerberg 7470bd680cdSMika Westerberg return ret; 748e6f81858SRajmohan Mani } 749e6f81858SRajmohan Mani 750e6f81858SRajmohan Mani static int tb_create_usb3_tunnels(struct tb_switch *sw) 751e6f81858SRajmohan Mani { 752e6f81858SRajmohan Mani struct tb_port *port; 753e6f81858SRajmohan Mani int ret; 754e6f81858SRajmohan Mani 755c6da62a2SMika Westerberg if (!tb_acpi_may_tunnel_usb3()) 756c6da62a2SMika Westerberg return 0; 757c6da62a2SMika Westerberg 758e6f81858SRajmohan Mani if (tb_route(sw)) { 759e6f81858SRajmohan Mani ret = tb_tunnel_usb3(sw->tb, sw); 760e6f81858SRajmohan Mani if (ret) 761e6f81858SRajmohan Mani return ret; 762e6f81858SRajmohan Mani } 763e6f81858SRajmohan Mani 764e6f81858SRajmohan Mani tb_switch_for_each_port(sw, port) { 765e6f81858SRajmohan Mani if (!tb_port_has_remote(port)) 766e6f81858SRajmohan Mani continue; 767e6f81858SRajmohan Mani ret = tb_create_usb3_tunnels(port->remote->sw); 768e6f81858SRajmohan Mani if (ret) 769e6f81858SRajmohan Mani return ret; 770e6f81858SRajmohan Mani } 771e6f81858SRajmohan Mani 772e6f81858SRajmohan Mani return 0; 773e6f81858SRajmohan Mani } 774e6f81858SRajmohan Mani 7759da672a4SAndreas Noever static void tb_scan_port(struct tb_port *port); 7769da672a4SAndreas Noever 777877e50b3SLee Jones /* 7789da672a4SAndreas Noever * tb_scan_switch() - scan for and initialize downstream switches 7799da672a4SAndreas Noever */ 7809da672a4SAndreas Noever static void tb_scan_switch(struct tb_switch *sw) 7819da672a4SAndreas Noever { 782b433d010SMika Westerberg struct tb_port *port; 783b433d010SMika Westerberg 7846ac6faeeSMika Westerberg pm_runtime_get_sync(&sw->dev); 7856ac6faeeSMika Westerberg 786b433d010SMika Westerberg tb_switch_for_each_port(sw, port) 787b433d010SMika Westerberg tb_scan_port(port); 7886ac6faeeSMika Westerberg 7896ac6faeeSMika Westerberg pm_runtime_mark_last_busy(&sw->dev); 7906ac6faeeSMika Westerberg pm_runtime_put_autosuspend(&sw->dev); 7919da672a4SAndreas Noever } 7929da672a4SAndreas Noever 793877e50b3SLee Jones /* 7949da672a4SAndreas Noever * tb_scan_port() - check for and initialize switches below port 7959da672a4SAndreas Noever */ 7969da672a4SAndreas Noever static void tb_scan_port(struct tb_port *port) 7979da672a4SAndreas Noever { 79899cabbb0SMika Westerberg struct tb_cm *tcm = tb_priv(port->sw->tb); 799dfe40ca4SMika Westerberg struct tb_port *upstream_port; 8003fe95742SMika Westerberg bool discovery = false; 8019da672a4SAndreas Noever struct tb_switch *sw; 802dfe40ca4SMika Westerberg 8039da672a4SAndreas Noever if (tb_is_upstream_port(port)) 8049da672a4SAndreas Noever return; 8054f807e47SMika Westerberg 8064f807e47SMika Westerberg if (tb_port_is_dpout(port) && tb_dp_port_hpd_is_active(port) == 1 && 8074f807e47SMika Westerberg !tb_dp_port_is_enabled(port)) { 8084f807e47SMika Westerberg tb_port_dbg(port, "DP adapter HPD set, queuing hotplug\n"); 8094f807e47SMika Westerberg tb_queue_hotplug(port->sw->tb, tb_route(port->sw), port->port, 8104f807e47SMika Westerberg false); 8114f807e47SMika Westerberg return; 8124f807e47SMika Westerberg } 8134f807e47SMika Westerberg 8149da672a4SAndreas Noever if (port->config.type != TB_TYPE_PORT) 8159da672a4SAndreas Noever return; 816343fcb8cSAndreas Noever if (port->dual_link_port && port->link_nr) 817343fcb8cSAndreas Noever return; /* 818343fcb8cSAndreas Noever * Downstream switch is reachable through two ports. 819343fcb8cSAndreas Noever * Only scan on the primary port (link_nr == 0). 820343fcb8cSAndreas Noever */ 82123257cfcSMika Westerberg 82223257cfcSMika Westerberg if (port->usb4) 82323257cfcSMika Westerberg pm_runtime_get_sync(&port->usb4->dev); 82423257cfcSMika Westerberg 8259da672a4SAndreas Noever if (tb_wait_for_port(port, false) <= 0) 82623257cfcSMika Westerberg goto out_rpm_put; 8279da672a4SAndreas Noever if (port->remote) { 8287ea4cd6bSMika Westerberg tb_port_dbg(port, "port already has a remote\n"); 82923257cfcSMika Westerberg goto out_rpm_put; 8309da672a4SAndreas Noever } 831dacb1287SKranthi Kuntala 8323fb10ea4SRajmohan Mani tb_retimer_scan(port, true); 833dacb1287SKranthi Kuntala 834bfe778acSMika Westerberg sw = tb_switch_alloc(port->sw->tb, &port->sw->dev, 835bfe778acSMika Westerberg tb_downstream_route(port)); 8367ea4cd6bSMika Westerberg if (IS_ERR(sw)) { 8377ea4cd6bSMika Westerberg /* 8387ea4cd6bSMika Westerberg * If there is an error accessing the connected switch 8397ea4cd6bSMika Westerberg * it may be connected to another domain. Also we allow 8407ea4cd6bSMika Westerberg * the other domain to be connected to a max depth switch. 8417ea4cd6bSMika Westerberg */ 8427ea4cd6bSMika Westerberg if (PTR_ERR(sw) == -EIO || PTR_ERR(sw) == -EADDRNOTAVAIL) 8437ea4cd6bSMika Westerberg tb_scan_xdomain(port); 84423257cfcSMika Westerberg goto out_rpm_put; 8457ea4cd6bSMika Westerberg } 846bfe778acSMika Westerberg 847bfe778acSMika Westerberg if (tb_switch_configure(sw)) { 848bfe778acSMika Westerberg tb_switch_put(sw); 84923257cfcSMika Westerberg goto out_rpm_put; 850bfe778acSMika Westerberg } 851bfe778acSMika Westerberg 85299cabbb0SMika Westerberg /* 8537ea4cd6bSMika Westerberg * If there was previously another domain connected remove it 8547ea4cd6bSMika Westerberg * first. 8557ea4cd6bSMika Westerberg */ 8567ea4cd6bSMika Westerberg if (port->xdomain) { 8577ea4cd6bSMika Westerberg tb_xdomain_remove(port->xdomain); 858284652a4SMika Westerberg tb_port_unconfigure_xdomain(port); 8597ea4cd6bSMika Westerberg port->xdomain = NULL; 8607ea4cd6bSMika Westerberg } 8617ea4cd6bSMika Westerberg 8627ea4cd6bSMika Westerberg /* 86399cabbb0SMika Westerberg * Do not send uevents until we have discovered all existing 86499cabbb0SMika Westerberg * tunnels and know which switches were authorized already by 86599cabbb0SMika Westerberg * the boot firmware. 86699cabbb0SMika Westerberg */ 8673fe95742SMika Westerberg if (!tcm->hotplug_active) { 86899cabbb0SMika Westerberg dev_set_uevent_suppress(&sw->dev, true); 8693fe95742SMika Westerberg discovery = true; 8703fe95742SMika Westerberg } 871f67cf491SMika Westerberg 8726ac6faeeSMika Westerberg /* 8736ac6faeeSMika Westerberg * At the moment Thunderbolt 2 and beyond (devices with LC) we 8746ac6faeeSMika Westerberg * can support runtime PM. 8756ac6faeeSMika Westerberg */ 8766ac6faeeSMika Westerberg sw->rpm = sw->generation > 1; 8776ac6faeeSMika Westerberg 878bfe778acSMika Westerberg if (tb_switch_add(sw)) { 879bfe778acSMika Westerberg tb_switch_put(sw); 88023257cfcSMika Westerberg goto out_rpm_put; 881bfe778acSMika Westerberg } 882bfe778acSMika Westerberg 883dfe40ca4SMika Westerberg /* Link the switches using both links if available */ 884dfe40ca4SMika Westerberg upstream_port = tb_upstream_port(sw); 885dfe40ca4SMika Westerberg port->remote = upstream_port; 886dfe40ca4SMika Westerberg upstream_port->remote = port; 887dfe40ca4SMika Westerberg if (port->dual_link_port && upstream_port->dual_link_port) { 888dfe40ca4SMika Westerberg port->dual_link_port->remote = upstream_port->dual_link_port; 889dfe40ca4SMika Westerberg upstream_port->dual_link_port->remote = port->dual_link_port; 890dfe40ca4SMika Westerberg } 891dfe40ca4SMika Westerberg 89291c0c120SMika Westerberg /* Enable lane bonding if supported */ 8932ca3263aSMika Westerberg tb_switch_lane_bonding_enable(sw); 894de462039SMika Westerberg /* Set the link configured */ 895de462039SMika Westerberg tb_switch_configure_link(sw); 896b017a46dSGil Fine /* 897b017a46dSGil Fine * CL0s and CL1 are enabled and supported together. 898b017a46dSGil Fine * Silently ignore CLx enabling in case CLx is not supported. 899b017a46dSGil Fine */ 9001a9b6cb8SMika Westerberg if (discovery) 9013fe95742SMika Westerberg tb_sw_dbg(sw, "discovery, not touching CL states\n"); 9021a9b6cb8SMika Westerberg else if (tb_enable_clx(sw)) 9031a9b6cb8SMika Westerberg tb_sw_warn(sw, "failed to enable CL states\n"); 9048a90e4faSGil Fine 905cf29b9afSRajmohan Mani if (tb_enable_tmu(sw)) 906cf29b9afSRajmohan Mani tb_sw_warn(sw, "failed to enable TMU\n"); 907cf29b9afSRajmohan Mani 908dacb1287SKranthi Kuntala /* Scan upstream retimers */ 9093fb10ea4SRajmohan Mani tb_retimer_scan(upstream_port, true); 910dacb1287SKranthi Kuntala 911e6f81858SRajmohan Mani /* 912e6f81858SRajmohan Mani * Create USB 3.x tunnels only when the switch is plugged to the 913e6f81858SRajmohan Mani * domain. This is because we scan the domain also during discovery 914e6f81858SRajmohan Mani * and want to discover existing USB 3.x tunnels before we create 915e6f81858SRajmohan Mani * any new. 916e6f81858SRajmohan Mani */ 917e6f81858SRajmohan Mani if (tcm->hotplug_active && tb_tunnel_usb3(sw->tb, sw)) 918e6f81858SRajmohan Mani tb_sw_warn(sw, "USB3 tunnel creation failed\n"); 919e6f81858SRajmohan Mani 920e876f34aSMika Westerberg tb_add_dp_resources(sw); 9219da672a4SAndreas Noever tb_scan_switch(sw); 92223257cfcSMika Westerberg 92323257cfcSMika Westerberg out_rpm_put: 92423257cfcSMika Westerberg if (port->usb4) { 92523257cfcSMika Westerberg pm_runtime_mark_last_busy(&port->usb4->dev); 92623257cfcSMika Westerberg pm_runtime_put_autosuspend(&port->usb4->dev); 92723257cfcSMika Westerberg } 9289da672a4SAndreas Noever } 9299da672a4SAndreas Noever 9308afe909bSMika Westerberg static void tb_deactivate_and_free_tunnel(struct tb_tunnel *tunnel) 9318afe909bSMika Westerberg { 9320bd680cdSMika Westerberg struct tb_port *src_port, *dst_port; 9330bd680cdSMika Westerberg struct tb *tb; 9340bd680cdSMika Westerberg 9358afe909bSMika Westerberg if (!tunnel) 9368afe909bSMika Westerberg return; 9378afe909bSMika Westerberg 9388afe909bSMika Westerberg tb_tunnel_deactivate(tunnel); 9398afe909bSMika Westerberg list_del(&tunnel->list); 9408afe909bSMika Westerberg 9410bd680cdSMika Westerberg tb = tunnel->tb; 9420bd680cdSMika Westerberg src_port = tunnel->src_port; 9430bd680cdSMika Westerberg dst_port = tunnel->dst_port; 9448afe909bSMika Westerberg 9450bd680cdSMika Westerberg switch (tunnel->type) { 9460bd680cdSMika Westerberg case TB_TUNNEL_DP: 9476ce35635SMika Westerberg tb_detach_bandwidth_group(src_port); 9480bd680cdSMika Westerberg /* 9490bd680cdSMika Westerberg * In case of DP tunnel make sure the DP IN resource is 9500bd680cdSMika Westerberg * deallocated properly. 9510bd680cdSMika Westerberg */ 9520bd680cdSMika Westerberg tb_switch_dealloc_dp_resource(src_port->sw, src_port); 9536ac6faeeSMika Westerberg /* Now we can allow the domain to runtime suspend again */ 9546ac6faeeSMika Westerberg pm_runtime_mark_last_busy(&dst_port->sw->dev); 9556ac6faeeSMika Westerberg pm_runtime_put_autosuspend(&dst_port->sw->dev); 9566ac6faeeSMika Westerberg pm_runtime_mark_last_busy(&src_port->sw->dev); 9576ac6faeeSMika Westerberg pm_runtime_put_autosuspend(&src_port->sw->dev); 9580bd680cdSMika Westerberg fallthrough; 9590bd680cdSMika Westerberg 9600bd680cdSMika Westerberg case TB_TUNNEL_USB3: 9610bd680cdSMika Westerberg tb_reclaim_usb3_bandwidth(tb, src_port, dst_port); 9620bd680cdSMika Westerberg break; 9630bd680cdSMika Westerberg 9640bd680cdSMika Westerberg default: 9650bd680cdSMika Westerberg /* 9660bd680cdSMika Westerberg * PCIe and DMA tunnels do not consume guaranteed 9670bd680cdSMika Westerberg * bandwidth. 9680bd680cdSMika Westerberg */ 9690bd680cdSMika Westerberg break; 9708afe909bSMika Westerberg } 9718afe909bSMika Westerberg 9728afe909bSMika Westerberg tb_tunnel_free(tunnel); 9734f807e47SMika Westerberg } 9744f807e47SMika Westerberg 975877e50b3SLee Jones /* 9763364f0c1SAndreas Noever * tb_free_invalid_tunnels() - destroy tunnels of devices that have gone away 9773364f0c1SAndreas Noever */ 9783364f0c1SAndreas Noever static void tb_free_invalid_tunnels(struct tb *tb) 9793364f0c1SAndreas Noever { 9809d3cce0bSMika Westerberg struct tb_cm *tcm = tb_priv(tb); 98193f36adeSMika Westerberg struct tb_tunnel *tunnel; 98293f36adeSMika Westerberg struct tb_tunnel *n; 9839d3cce0bSMika Westerberg 9849d3cce0bSMika Westerberg list_for_each_entry_safe(tunnel, n, &tcm->tunnel_list, list) { 9858afe909bSMika Westerberg if (tb_tunnel_is_invalid(tunnel)) 9868afe909bSMika Westerberg tb_deactivate_and_free_tunnel(tunnel); 9873364f0c1SAndreas Noever } 9883364f0c1SAndreas Noever } 9893364f0c1SAndreas Noever 990877e50b3SLee Jones /* 99123dd5bb4SAndreas Noever * tb_free_unplugged_children() - traverse hierarchy and free unplugged switches 99223dd5bb4SAndreas Noever */ 99323dd5bb4SAndreas Noever static void tb_free_unplugged_children(struct tb_switch *sw) 99423dd5bb4SAndreas Noever { 995b433d010SMika Westerberg struct tb_port *port; 996dfe40ca4SMika Westerberg 997b433d010SMika Westerberg tb_switch_for_each_port(sw, port) { 998dfe40ca4SMika Westerberg if (!tb_port_has_remote(port)) 99923dd5bb4SAndreas Noever continue; 1000dfe40ca4SMika Westerberg 100123dd5bb4SAndreas Noever if (port->remote->sw->is_unplugged) { 1002dacb1287SKranthi Kuntala tb_retimer_remove_all(port); 10038afe909bSMika Westerberg tb_remove_dp_resources(port->remote->sw); 1004de462039SMika Westerberg tb_switch_unconfigure_link(port->remote->sw); 100591c0c120SMika Westerberg tb_switch_lane_bonding_disable(port->remote->sw); 1006bfe778acSMika Westerberg tb_switch_remove(port->remote->sw); 100723dd5bb4SAndreas Noever port->remote = NULL; 1008dfe40ca4SMika Westerberg if (port->dual_link_port) 1009dfe40ca4SMika Westerberg port->dual_link_port->remote = NULL; 101023dd5bb4SAndreas Noever } else { 101123dd5bb4SAndreas Noever tb_free_unplugged_children(port->remote->sw); 101223dd5bb4SAndreas Noever } 101323dd5bb4SAndreas Noever } 101423dd5bb4SAndreas Noever } 101523dd5bb4SAndreas Noever 101699cabbb0SMika Westerberg static struct tb_port *tb_find_pcie_down(struct tb_switch *sw, 101799cabbb0SMika Westerberg const struct tb_port *port) 10183364f0c1SAndreas Noever { 1019b0407983SMika Westerberg struct tb_port *down = NULL; 1020b0407983SMika Westerberg 102199cabbb0SMika Westerberg /* 102299cabbb0SMika Westerberg * To keep plugging devices consistently in the same PCIe 1023b0407983SMika Westerberg * hierarchy, do mapping here for switch downstream PCIe ports. 102499cabbb0SMika Westerberg */ 1025b0407983SMika Westerberg if (tb_switch_is_usb4(sw)) { 1026b0407983SMika Westerberg down = usb4_switch_map_pcie_down(sw, port); 1027b0407983SMika Westerberg } else if (!tb_route(sw)) { 102899cabbb0SMika Westerberg int phy_port = tb_phy_port_from_link(port->port); 102999cabbb0SMika Westerberg int index; 103099cabbb0SMika Westerberg 103199cabbb0SMika Westerberg /* 103299cabbb0SMika Westerberg * Hard-coded Thunderbolt port to PCIe down port mapping 103399cabbb0SMika Westerberg * per controller. 103499cabbb0SMika Westerberg */ 10357bffd97eSMika Westerberg if (tb_switch_is_cactus_ridge(sw) || 10367bffd97eSMika Westerberg tb_switch_is_alpine_ridge(sw)) 103799cabbb0SMika Westerberg index = !phy_port ? 6 : 7; 103817a8f815SMika Westerberg else if (tb_switch_is_falcon_ridge(sw)) 103999cabbb0SMika Westerberg index = !phy_port ? 6 : 8; 10407bffd97eSMika Westerberg else if (tb_switch_is_titan_ridge(sw)) 10417bffd97eSMika Westerberg index = !phy_port ? 8 : 9; 104299cabbb0SMika Westerberg else 104399cabbb0SMika Westerberg goto out; 104499cabbb0SMika Westerberg 104599cabbb0SMika Westerberg /* Validate the hard-coding */ 104699cabbb0SMika Westerberg if (WARN_ON(index > sw->config.max_port_number)) 104799cabbb0SMika Westerberg goto out; 1048b0407983SMika Westerberg 1049b0407983SMika Westerberg down = &sw->ports[index]; 1050b0407983SMika Westerberg } 1051b0407983SMika Westerberg 1052b0407983SMika Westerberg if (down) { 1053b0407983SMika Westerberg if (WARN_ON(!tb_port_is_pcie_down(down))) 105499cabbb0SMika Westerberg goto out; 10559cac51a0SMika Westerberg if (tb_pci_port_is_enabled(down)) 105699cabbb0SMika Westerberg goto out; 105799cabbb0SMika Westerberg 1058b0407983SMika Westerberg return down; 105999cabbb0SMika Westerberg } 106099cabbb0SMika Westerberg 106199cabbb0SMika Westerberg out: 1062e78db6f0SMika Westerberg return tb_find_unused_port(sw, TB_TYPE_PCIE_DOWN); 106399cabbb0SMika Westerberg } 106499cabbb0SMika Westerberg 10656ce35635SMika Westerberg static void 10666ce35635SMika Westerberg tb_recalc_estimated_bandwidth_for_group(struct tb_bandwidth_group *group) 10676ce35635SMika Westerberg { 10686ce35635SMika Westerberg struct tb_tunnel *first_tunnel; 10696ce35635SMika Westerberg struct tb *tb = group->tb; 10706ce35635SMika Westerberg struct tb_port *in; 10716ce35635SMika Westerberg int ret; 10726ce35635SMika Westerberg 10736ce35635SMika Westerberg tb_dbg(tb, "re-calculating bandwidth estimation for group %u\n", 10746ce35635SMika Westerberg group->index); 10756ce35635SMika Westerberg 10766ce35635SMika Westerberg first_tunnel = NULL; 10776ce35635SMika Westerberg list_for_each_entry(in, &group->ports, group_list) { 10786ce35635SMika Westerberg int estimated_bw, estimated_up, estimated_down; 10796ce35635SMika Westerberg struct tb_tunnel *tunnel; 10806ce35635SMika Westerberg struct tb_port *out; 10816ce35635SMika Westerberg 10826ce35635SMika Westerberg if (!usb4_dp_port_bw_mode_enabled(in)) 10836ce35635SMika Westerberg continue; 10846ce35635SMika Westerberg 10856ce35635SMika Westerberg tunnel = tb_find_tunnel(tb, TB_TUNNEL_DP, in, NULL); 10866ce35635SMika Westerberg if (WARN_ON(!tunnel)) 10876ce35635SMika Westerberg break; 10886ce35635SMika Westerberg 10896ce35635SMika Westerberg if (!first_tunnel) { 10906ce35635SMika Westerberg /* 10916ce35635SMika Westerberg * Since USB3 bandwidth is shared by all DP 10926ce35635SMika Westerberg * tunnels under the host router USB4 port, even 10936ce35635SMika Westerberg * if they do not begin from the host router, we 10946ce35635SMika Westerberg * can release USB3 bandwidth just once and not 10956ce35635SMika Westerberg * for each tunnel separately. 10966ce35635SMika Westerberg */ 10976ce35635SMika Westerberg first_tunnel = tunnel; 10986ce35635SMika Westerberg ret = tb_release_unused_usb3_bandwidth(tb, 10996ce35635SMika Westerberg first_tunnel->src_port, first_tunnel->dst_port); 11006ce35635SMika Westerberg if (ret) { 11016ce35635SMika Westerberg tb_port_warn(in, 11026ce35635SMika Westerberg "failed to release unused bandwidth\n"); 11036ce35635SMika Westerberg break; 11046ce35635SMika Westerberg } 11056ce35635SMika Westerberg } 11066ce35635SMika Westerberg 11076ce35635SMika Westerberg out = tunnel->dst_port; 11086ce35635SMika Westerberg ret = tb_available_bandwidth(tb, in, out, &estimated_up, 11096ce35635SMika Westerberg &estimated_down); 11106ce35635SMika Westerberg if (ret) { 11116ce35635SMika Westerberg tb_port_warn(in, 11126ce35635SMika Westerberg "failed to re-calculate estimated bandwidth\n"); 11136ce35635SMika Westerberg break; 11146ce35635SMika Westerberg } 11156ce35635SMika Westerberg 11166ce35635SMika Westerberg /* 11176ce35635SMika Westerberg * Estimated bandwidth includes: 11186ce35635SMika Westerberg * - already allocated bandwidth for the DP tunnel 11196ce35635SMika Westerberg * - available bandwidth along the path 11206ce35635SMika Westerberg * - bandwidth allocated for USB 3.x but not used. 11216ce35635SMika Westerberg */ 11226ce35635SMika Westerberg tb_port_dbg(in, "re-calculated estimated bandwidth %u/%u Mb/s\n", 11236ce35635SMika Westerberg estimated_up, estimated_down); 11246ce35635SMika Westerberg 11256ce35635SMika Westerberg if (in->sw->config.depth < out->sw->config.depth) 11266ce35635SMika Westerberg estimated_bw = estimated_down; 11276ce35635SMika Westerberg else 11286ce35635SMika Westerberg estimated_bw = estimated_up; 11296ce35635SMika Westerberg 11306ce35635SMika Westerberg if (usb4_dp_port_set_estimated_bw(in, estimated_bw)) 11316ce35635SMika Westerberg tb_port_warn(in, "failed to update estimated bandwidth\n"); 11326ce35635SMika Westerberg } 11336ce35635SMika Westerberg 11346ce35635SMika Westerberg if (first_tunnel) 11356ce35635SMika Westerberg tb_reclaim_usb3_bandwidth(tb, first_tunnel->src_port, 11366ce35635SMika Westerberg first_tunnel->dst_port); 11376ce35635SMika Westerberg 11386ce35635SMika Westerberg tb_dbg(tb, "bandwidth estimation for group %u done\n", group->index); 11396ce35635SMika Westerberg } 11406ce35635SMika Westerberg 11416ce35635SMika Westerberg static void tb_recalc_estimated_bandwidth(struct tb *tb) 11426ce35635SMika Westerberg { 11436ce35635SMika Westerberg struct tb_cm *tcm = tb_priv(tb); 11446ce35635SMika Westerberg int i; 11456ce35635SMika Westerberg 11466ce35635SMika Westerberg tb_dbg(tb, "bandwidth consumption changed, re-calculating estimated bandwidth\n"); 11476ce35635SMika Westerberg 11486ce35635SMika Westerberg for (i = 0; i < ARRAY_SIZE(tcm->groups); i++) { 11496ce35635SMika Westerberg struct tb_bandwidth_group *group = &tcm->groups[i]; 11506ce35635SMika Westerberg 11516ce35635SMika Westerberg if (!list_empty(&group->ports)) 11526ce35635SMika Westerberg tb_recalc_estimated_bandwidth_for_group(group); 11536ce35635SMika Westerberg } 11546ce35635SMika Westerberg 11556ce35635SMika Westerberg tb_dbg(tb, "bandwidth re-calculation done\n"); 11566ce35635SMika Westerberg } 11576ce35635SMika Westerberg 1158e876f34aSMika Westerberg static struct tb_port *tb_find_dp_out(struct tb *tb, struct tb_port *in) 1159e876f34aSMika Westerberg { 1160e876f34aSMika Westerberg struct tb_port *host_port, *port; 1161e876f34aSMika Westerberg struct tb_cm *tcm = tb_priv(tb); 1162e876f34aSMika Westerberg 1163e876f34aSMika Westerberg host_port = tb_route(in->sw) ? 1164e876f34aSMika Westerberg tb_port_at(tb_route(in->sw), tb->root_switch) : NULL; 1165e876f34aSMika Westerberg 1166e876f34aSMika Westerberg list_for_each_entry(port, &tcm->dp_resources, list) { 1167e876f34aSMika Westerberg if (!tb_port_is_dpout(port)) 1168e876f34aSMika Westerberg continue; 1169e876f34aSMika Westerberg 1170e876f34aSMika Westerberg if (tb_port_is_enabled(port)) { 1171b0ef48fcSMika Westerberg tb_port_dbg(port, "DP OUT in use\n"); 1172e876f34aSMika Westerberg continue; 1173e876f34aSMika Westerberg } 1174e876f34aSMika Westerberg 1175e876f34aSMika Westerberg tb_port_dbg(port, "DP OUT available\n"); 1176e876f34aSMika Westerberg 1177e876f34aSMika Westerberg /* 1178e876f34aSMika Westerberg * Keep the DP tunnel under the topology starting from 1179e876f34aSMika Westerberg * the same host router downstream port. 1180e876f34aSMika Westerberg */ 1181e876f34aSMika Westerberg if (host_port && tb_route(port->sw)) { 1182e876f34aSMika Westerberg struct tb_port *p; 1183e876f34aSMika Westerberg 1184e876f34aSMika Westerberg p = tb_port_at(tb_route(port->sw), tb->root_switch); 1185e876f34aSMika Westerberg if (p != host_port) 1186e876f34aSMika Westerberg continue; 1187e876f34aSMika Westerberg } 1188e876f34aSMika Westerberg 1189e876f34aSMika Westerberg return port; 1190e876f34aSMika Westerberg } 1191e876f34aSMika Westerberg 1192e876f34aSMika Westerberg return NULL; 1193e876f34aSMika Westerberg } 1194e876f34aSMika Westerberg 11958afe909bSMika Westerberg static void tb_tunnel_dp(struct tb *tb) 11964f807e47SMika Westerberg { 11979d2d0a5cSMika Westerberg int available_up, available_down, ret, link_nr; 11984f807e47SMika Westerberg struct tb_cm *tcm = tb_priv(tb); 11998afe909bSMika Westerberg struct tb_port *port, *in, *out; 12004f807e47SMika Westerberg struct tb_tunnel *tunnel; 12014f807e47SMika Westerberg 1202c6da62a2SMika Westerberg if (!tb_acpi_may_tunnel_dp()) { 1203c6da62a2SMika Westerberg tb_dbg(tb, "DP tunneling disabled, not creating tunnel\n"); 1204c6da62a2SMika Westerberg return; 1205c6da62a2SMika Westerberg } 1206c6da62a2SMika Westerberg 12078afe909bSMika Westerberg /* 12088afe909bSMika Westerberg * Find pair of inactive DP IN and DP OUT adapters and then 12098afe909bSMika Westerberg * establish a DP tunnel between them. 12108afe909bSMika Westerberg */ 12118afe909bSMika Westerberg tb_dbg(tb, "looking for DP IN <-> DP OUT pairs:\n"); 12124f807e47SMika Westerberg 12138afe909bSMika Westerberg in = NULL; 12148afe909bSMika Westerberg out = NULL; 12158afe909bSMika Westerberg list_for_each_entry(port, &tcm->dp_resources, list) { 1216e876f34aSMika Westerberg if (!tb_port_is_dpin(port)) 1217e876f34aSMika Westerberg continue; 1218e876f34aSMika Westerberg 12198afe909bSMika Westerberg if (tb_port_is_enabled(port)) { 1220b0ef48fcSMika Westerberg tb_port_dbg(port, "DP IN in use\n"); 12218afe909bSMika Westerberg continue; 12228afe909bSMika Westerberg } 12238afe909bSMika Westerberg 1224e876f34aSMika Westerberg tb_port_dbg(port, "DP IN available\n"); 12258afe909bSMika Westerberg 1226e876f34aSMika Westerberg out = tb_find_dp_out(tb, port); 1227e876f34aSMika Westerberg if (out) { 12288afe909bSMika Westerberg in = port; 1229e876f34aSMika Westerberg break; 1230e876f34aSMika Westerberg } 12318afe909bSMika Westerberg } 12328afe909bSMika Westerberg 12338afe909bSMika Westerberg if (!in) { 12348afe909bSMika Westerberg tb_dbg(tb, "no suitable DP IN adapter available, not tunneling\n"); 12358afe909bSMika Westerberg return; 12368afe909bSMika Westerberg } 12378afe909bSMika Westerberg if (!out) { 12388afe909bSMika Westerberg tb_dbg(tb, "no suitable DP OUT adapter available, not tunneling\n"); 12398afe909bSMika Westerberg return; 12408afe909bSMika Westerberg } 12418afe909bSMika Westerberg 12426ac6faeeSMika Westerberg /* 12439d2d0a5cSMika Westerberg * This is only applicable to links that are not bonded (so 12449d2d0a5cSMika Westerberg * when Thunderbolt 1 hardware is involved somewhere in the 12459d2d0a5cSMika Westerberg * topology). For these try to share the DP bandwidth between 12469d2d0a5cSMika Westerberg * the two lanes. 12479d2d0a5cSMika Westerberg */ 12489d2d0a5cSMika Westerberg link_nr = 1; 12499d2d0a5cSMika Westerberg list_for_each_entry(tunnel, &tcm->tunnel_list, list) { 12509d2d0a5cSMika Westerberg if (tb_tunnel_is_dp(tunnel)) { 12519d2d0a5cSMika Westerberg link_nr = 0; 12529d2d0a5cSMika Westerberg break; 12539d2d0a5cSMika Westerberg } 12549d2d0a5cSMika Westerberg } 12559d2d0a5cSMika Westerberg 12569d2d0a5cSMika Westerberg /* 12576ac6faeeSMika Westerberg * DP stream needs the domain to be active so runtime resume 12586ac6faeeSMika Westerberg * both ends of the tunnel. 12596ac6faeeSMika Westerberg * 12606ac6faeeSMika Westerberg * This should bring the routers in the middle active as well 12616ac6faeeSMika Westerberg * and keeps the domain from runtime suspending while the DP 12626ac6faeeSMika Westerberg * tunnel is active. 12636ac6faeeSMika Westerberg */ 12646ac6faeeSMika Westerberg pm_runtime_get_sync(&in->sw->dev); 12656ac6faeeSMika Westerberg pm_runtime_get_sync(&out->sw->dev); 12666ac6faeeSMika Westerberg 12678afe909bSMika Westerberg if (tb_switch_alloc_dp_resource(in->sw, in)) { 12688afe909bSMika Westerberg tb_port_dbg(in, "no resource available for DP IN, not tunneling\n"); 12696ac6faeeSMika Westerberg goto err_rpm_put; 12708afe909bSMika Westerberg } 12714f807e47SMika Westerberg 12726ce35635SMika Westerberg if (!tb_attach_bandwidth_group(tcm, in, out)) 12736ce35635SMika Westerberg goto err_dealloc_dp; 12746ce35635SMika Westerberg 12750bd680cdSMika Westerberg /* Make all unused USB3 bandwidth available for the new DP tunnel */ 12760bd680cdSMika Westerberg ret = tb_release_unused_usb3_bandwidth(tb, in, out); 12770bd680cdSMika Westerberg if (ret) { 12780bd680cdSMika Westerberg tb_warn(tb, "failed to release unused bandwidth\n"); 12796ce35635SMika Westerberg goto err_detach_group; 1280a11b88adSMika Westerberg } 1281a11b88adSMika Westerberg 12826ce35635SMika Westerberg ret = tb_available_bandwidth(tb, in, out, &available_up, &available_down); 12830bd680cdSMika Westerberg if (ret) 12846ce35635SMika Westerberg goto err_reclaim_usb; 1285a11b88adSMika Westerberg 12860bd680cdSMika Westerberg tb_dbg(tb, "available bandwidth for new DP tunnel %u/%u Mb/s\n", 12870bd680cdSMika Westerberg available_up, available_down); 12880bd680cdSMika Westerberg 12899d2d0a5cSMika Westerberg tunnel = tb_tunnel_alloc_dp(tb, in, out, link_nr, available_up, 12909d2d0a5cSMika Westerberg available_down); 12914f807e47SMika Westerberg if (!tunnel) { 12928afe909bSMika Westerberg tb_port_dbg(out, "could not allocate DP tunnel\n"); 12936ce35635SMika Westerberg goto err_reclaim_usb; 12944f807e47SMika Westerberg } 12954f807e47SMika Westerberg 12964f807e47SMika Westerberg if (tb_tunnel_activate(tunnel)) { 12974f807e47SMika Westerberg tb_port_info(out, "DP tunnel activation failed, aborting\n"); 12980bd680cdSMika Westerberg goto err_free; 12994f807e47SMika Westerberg } 13004f807e47SMika Westerberg 13014f807e47SMika Westerberg list_add_tail(&tunnel->list, &tcm->tunnel_list); 13020bd680cdSMika Westerberg tb_reclaim_usb3_bandwidth(tb, in, out); 13036ce35635SMika Westerberg 13046ce35635SMika Westerberg /* Update the domain with the new bandwidth estimation */ 13056ce35635SMika Westerberg tb_recalc_estimated_bandwidth(tb); 13066ce35635SMika Westerberg 13073084b48fSGil Fine /* 13083084b48fSGil Fine * In case of DP tunnel exists, change host router's 1st children 13093084b48fSGil Fine * TMU mode to HiFi for CL0s to work. 13103084b48fSGil Fine */ 13117d283f41SMika Westerberg tb_increase_tmu_accuracy(tunnel); 13128afe909bSMika Westerberg return; 13138afe909bSMika Westerberg 13140bd680cdSMika Westerberg err_free: 13150bd680cdSMika Westerberg tb_tunnel_free(tunnel); 13166ce35635SMika Westerberg err_reclaim_usb: 13170bd680cdSMika Westerberg tb_reclaim_usb3_bandwidth(tb, in, out); 13186ce35635SMika Westerberg err_detach_group: 13196ce35635SMika Westerberg tb_detach_bandwidth_group(in); 13200bd680cdSMika Westerberg err_dealloc_dp: 13218afe909bSMika Westerberg tb_switch_dealloc_dp_resource(in->sw, in); 13226ac6faeeSMika Westerberg err_rpm_put: 13236ac6faeeSMika Westerberg pm_runtime_mark_last_busy(&out->sw->dev); 13246ac6faeeSMika Westerberg pm_runtime_put_autosuspend(&out->sw->dev); 13256ac6faeeSMika Westerberg pm_runtime_mark_last_busy(&in->sw->dev); 13266ac6faeeSMika Westerberg pm_runtime_put_autosuspend(&in->sw->dev); 13274f807e47SMika Westerberg } 13284f807e47SMika Westerberg 13298afe909bSMika Westerberg static void tb_dp_resource_unavailable(struct tb *tb, struct tb_port *port) 13304f807e47SMika Westerberg { 13318afe909bSMika Westerberg struct tb_port *in, *out; 13328afe909bSMika Westerberg struct tb_tunnel *tunnel; 13338afe909bSMika Westerberg 13348afe909bSMika Westerberg if (tb_port_is_dpin(port)) { 13358afe909bSMika Westerberg tb_port_dbg(port, "DP IN resource unavailable\n"); 13368afe909bSMika Westerberg in = port; 13378afe909bSMika Westerberg out = NULL; 13388afe909bSMika Westerberg } else { 13398afe909bSMika Westerberg tb_port_dbg(port, "DP OUT resource unavailable\n"); 13408afe909bSMika Westerberg in = NULL; 13418afe909bSMika Westerberg out = port; 13428afe909bSMika Westerberg } 13438afe909bSMika Westerberg 13448afe909bSMika Westerberg tunnel = tb_find_tunnel(tb, TB_TUNNEL_DP, in, out); 13458afe909bSMika Westerberg tb_deactivate_and_free_tunnel(tunnel); 13468afe909bSMika Westerberg list_del_init(&port->list); 13478afe909bSMika Westerberg 13488afe909bSMika Westerberg /* 13498afe909bSMika Westerberg * See if there is another DP OUT port that can be used for 13508afe909bSMika Westerberg * to create another tunnel. 13518afe909bSMika Westerberg */ 13526ce35635SMika Westerberg tb_recalc_estimated_bandwidth(tb); 13538afe909bSMika Westerberg tb_tunnel_dp(tb); 13548afe909bSMika Westerberg } 13558afe909bSMika Westerberg 13568afe909bSMika Westerberg static void tb_dp_resource_available(struct tb *tb, struct tb_port *port) 13578afe909bSMika Westerberg { 13588afe909bSMika Westerberg struct tb_cm *tcm = tb_priv(tb); 13598afe909bSMika Westerberg struct tb_port *p; 13608afe909bSMika Westerberg 13618afe909bSMika Westerberg if (tb_port_is_enabled(port)) 13628afe909bSMika Westerberg return; 13638afe909bSMika Westerberg 13648afe909bSMika Westerberg list_for_each_entry(p, &tcm->dp_resources, list) { 13658afe909bSMika Westerberg if (p == port) 13668afe909bSMika Westerberg return; 13678afe909bSMika Westerberg } 13688afe909bSMika Westerberg 13698afe909bSMika Westerberg tb_port_dbg(port, "DP %s resource available\n", 13708afe909bSMika Westerberg tb_port_is_dpin(port) ? "IN" : "OUT"); 13718afe909bSMika Westerberg list_add_tail(&port->list, &tcm->dp_resources); 13728afe909bSMika Westerberg 13738afe909bSMika Westerberg /* Look for suitable DP IN <-> DP OUT pairs now */ 13748afe909bSMika Westerberg tb_tunnel_dp(tb); 13754f807e47SMika Westerberg } 13764f807e47SMika Westerberg 137781a2e3e4SMika Westerberg static void tb_disconnect_and_release_dp(struct tb *tb) 137881a2e3e4SMika Westerberg { 137981a2e3e4SMika Westerberg struct tb_cm *tcm = tb_priv(tb); 138081a2e3e4SMika Westerberg struct tb_tunnel *tunnel, *n; 138181a2e3e4SMika Westerberg 138281a2e3e4SMika Westerberg /* 138381a2e3e4SMika Westerberg * Tear down all DP tunnels and release their resources. They 138481a2e3e4SMika Westerberg * will be re-established after resume based on plug events. 138581a2e3e4SMika Westerberg */ 138681a2e3e4SMika Westerberg list_for_each_entry_safe_reverse(tunnel, n, &tcm->tunnel_list, list) { 138781a2e3e4SMika Westerberg if (tb_tunnel_is_dp(tunnel)) 138881a2e3e4SMika Westerberg tb_deactivate_and_free_tunnel(tunnel); 138981a2e3e4SMika Westerberg } 139081a2e3e4SMika Westerberg 139181a2e3e4SMika Westerberg while (!list_empty(&tcm->dp_resources)) { 139281a2e3e4SMika Westerberg struct tb_port *port; 139381a2e3e4SMika Westerberg 139481a2e3e4SMika Westerberg port = list_first_entry(&tcm->dp_resources, 139581a2e3e4SMika Westerberg struct tb_port, list); 139681a2e3e4SMika Westerberg list_del_init(&port->list); 139781a2e3e4SMika Westerberg } 139881a2e3e4SMika Westerberg } 139981a2e3e4SMika Westerberg 14003da88be2SMika Westerberg static int tb_disconnect_pci(struct tb *tb, struct tb_switch *sw) 14013da88be2SMika Westerberg { 14023da88be2SMika Westerberg struct tb_tunnel *tunnel; 14033da88be2SMika Westerberg struct tb_port *up; 14043da88be2SMika Westerberg 14053da88be2SMika Westerberg up = tb_switch_find_port(sw, TB_TYPE_PCIE_UP); 14063da88be2SMika Westerberg if (WARN_ON(!up)) 14073da88be2SMika Westerberg return -ENODEV; 14083da88be2SMika Westerberg 14093da88be2SMika Westerberg tunnel = tb_find_tunnel(tb, TB_TUNNEL_PCI, NULL, up); 14103da88be2SMika Westerberg if (WARN_ON(!tunnel)) 14113da88be2SMika Westerberg return -ENODEV; 14123da88be2SMika Westerberg 141330a4eca6SMika Westerberg tb_switch_xhci_disconnect(sw); 141430a4eca6SMika Westerberg 14153da88be2SMika Westerberg tb_tunnel_deactivate(tunnel); 14163da88be2SMika Westerberg list_del(&tunnel->list); 14173da88be2SMika Westerberg tb_tunnel_free(tunnel); 14183da88be2SMika Westerberg return 0; 14193da88be2SMika Westerberg } 14203da88be2SMika Westerberg 142199cabbb0SMika Westerberg static int tb_tunnel_pci(struct tb *tb, struct tb_switch *sw) 142299cabbb0SMika Westerberg { 142399cabbb0SMika Westerberg struct tb_port *up, *down, *port; 14249d3cce0bSMika Westerberg struct tb_cm *tcm = tb_priv(tb); 142599cabbb0SMika Westerberg struct tb_tunnel *tunnel; 14269d3cce0bSMika Westerberg 1427386e5e29SMika Westerberg up = tb_switch_find_port(sw, TB_TYPE_PCIE_UP); 142899cabbb0SMika Westerberg if (!up) 142999cabbb0SMika Westerberg return 0; 14303364f0c1SAndreas Noever 143199cabbb0SMika Westerberg /* 143299cabbb0SMika Westerberg * Look up available down port. Since we are chaining it should 143399cabbb0SMika Westerberg * be found right above this switch. 143499cabbb0SMika Westerberg */ 14357ce54221SGil Fine port = tb_switch_downstream_port(sw); 14367ce54221SGil Fine down = tb_find_pcie_down(tb_switch_parent(sw), port); 143799cabbb0SMika Westerberg if (!down) 143899cabbb0SMika Westerberg return 0; 14393364f0c1SAndreas Noever 144099cabbb0SMika Westerberg tunnel = tb_tunnel_alloc_pci(tb, up, down); 144199cabbb0SMika Westerberg if (!tunnel) 144299cabbb0SMika Westerberg return -ENOMEM; 14433364f0c1SAndreas Noever 144493f36adeSMika Westerberg if (tb_tunnel_activate(tunnel)) { 144599cabbb0SMika Westerberg tb_port_info(up, 14463364f0c1SAndreas Noever "PCIe tunnel activation failed, aborting\n"); 144793f36adeSMika Westerberg tb_tunnel_free(tunnel); 144899cabbb0SMika Westerberg return -EIO; 14493364f0c1SAndreas Noever } 14503364f0c1SAndreas Noever 145143f977bcSGil Fine /* 145243f977bcSGil Fine * PCIe L1 is needed to enable CL0s for Titan Ridge so enable it 145343f977bcSGil Fine * here. 145443f977bcSGil Fine */ 145543f977bcSGil Fine if (tb_switch_pcie_l1_enable(sw)) 145643f977bcSGil Fine tb_sw_warn(sw, "failed to enable PCIe L1 for Titan Ridge\n"); 145743f977bcSGil Fine 145830a4eca6SMika Westerberg if (tb_switch_xhci_connect(sw)) 145930a4eca6SMika Westerberg tb_sw_warn(sw, "failed to connect xHCI\n"); 146030a4eca6SMika Westerberg 146199cabbb0SMika Westerberg list_add_tail(&tunnel->list, &tcm->tunnel_list); 146299cabbb0SMika Westerberg return 0; 14633364f0c1SAndreas Noever } 14649da672a4SAndreas Noever 1465180b0689SMika Westerberg static int tb_approve_xdomain_paths(struct tb *tb, struct tb_xdomain *xd, 1466180b0689SMika Westerberg int transmit_path, int transmit_ring, 1467180b0689SMika Westerberg int receive_path, int receive_ring) 14687ea4cd6bSMika Westerberg { 14697ea4cd6bSMika Westerberg struct tb_cm *tcm = tb_priv(tb); 14707ea4cd6bSMika Westerberg struct tb_port *nhi_port, *dst_port; 14717ea4cd6bSMika Westerberg struct tb_tunnel *tunnel; 14727ea4cd6bSMika Westerberg struct tb_switch *sw; 14737ea4cd6bSMika Westerberg 14747ea4cd6bSMika Westerberg sw = tb_to_switch(xd->dev.parent); 14757ea4cd6bSMika Westerberg dst_port = tb_port_at(xd->route, sw); 1476386e5e29SMika Westerberg nhi_port = tb_switch_find_port(tb->root_switch, TB_TYPE_NHI); 14777ea4cd6bSMika Westerberg 14787ea4cd6bSMika Westerberg mutex_lock(&tb->lock); 1479180b0689SMika Westerberg tunnel = tb_tunnel_alloc_dma(tb, nhi_port, dst_port, transmit_path, 1480180b0689SMika Westerberg transmit_ring, receive_path, receive_ring); 14817ea4cd6bSMika Westerberg if (!tunnel) { 14827ea4cd6bSMika Westerberg mutex_unlock(&tb->lock); 14837ea4cd6bSMika Westerberg return -ENOMEM; 14847ea4cd6bSMika Westerberg } 14857ea4cd6bSMika Westerberg 14867ea4cd6bSMika Westerberg if (tb_tunnel_activate(tunnel)) { 14877ea4cd6bSMika Westerberg tb_port_info(nhi_port, 14887ea4cd6bSMika Westerberg "DMA tunnel activation failed, aborting\n"); 14897ea4cd6bSMika Westerberg tb_tunnel_free(tunnel); 14907ea4cd6bSMika Westerberg mutex_unlock(&tb->lock); 14917ea4cd6bSMika Westerberg return -EIO; 14927ea4cd6bSMika Westerberg } 14937ea4cd6bSMika Westerberg 14947ea4cd6bSMika Westerberg list_add_tail(&tunnel->list, &tcm->tunnel_list); 14957ea4cd6bSMika Westerberg mutex_unlock(&tb->lock); 14967ea4cd6bSMika Westerberg return 0; 14977ea4cd6bSMika Westerberg } 14987ea4cd6bSMika Westerberg 1499180b0689SMika Westerberg static void __tb_disconnect_xdomain_paths(struct tb *tb, struct tb_xdomain *xd, 1500180b0689SMika Westerberg int transmit_path, int transmit_ring, 1501180b0689SMika Westerberg int receive_path, int receive_ring) 15027ea4cd6bSMika Westerberg { 1503180b0689SMika Westerberg struct tb_cm *tcm = tb_priv(tb); 1504180b0689SMika Westerberg struct tb_port *nhi_port, *dst_port; 1505180b0689SMika Westerberg struct tb_tunnel *tunnel, *n; 15067ea4cd6bSMika Westerberg struct tb_switch *sw; 15077ea4cd6bSMika Westerberg 15087ea4cd6bSMika Westerberg sw = tb_to_switch(xd->dev.parent); 15097ea4cd6bSMika Westerberg dst_port = tb_port_at(xd->route, sw); 1510180b0689SMika Westerberg nhi_port = tb_switch_find_port(tb->root_switch, TB_TYPE_NHI); 15117ea4cd6bSMika Westerberg 1512180b0689SMika Westerberg list_for_each_entry_safe(tunnel, n, &tcm->tunnel_list, list) { 1513180b0689SMika Westerberg if (!tb_tunnel_is_dma(tunnel)) 1514180b0689SMika Westerberg continue; 1515180b0689SMika Westerberg if (tunnel->src_port != nhi_port || tunnel->dst_port != dst_port) 1516180b0689SMika Westerberg continue; 1517180b0689SMika Westerberg 1518180b0689SMika Westerberg if (tb_tunnel_match_dma(tunnel, transmit_path, transmit_ring, 1519180b0689SMika Westerberg receive_path, receive_ring)) 15208afe909bSMika Westerberg tb_deactivate_and_free_tunnel(tunnel); 15217ea4cd6bSMika Westerberg } 1522180b0689SMika Westerberg } 15237ea4cd6bSMika Westerberg 1524180b0689SMika Westerberg static int tb_disconnect_xdomain_paths(struct tb *tb, struct tb_xdomain *xd, 1525180b0689SMika Westerberg int transmit_path, int transmit_ring, 1526180b0689SMika Westerberg int receive_path, int receive_ring) 15277ea4cd6bSMika Westerberg { 15287ea4cd6bSMika Westerberg if (!xd->is_unplugged) { 15297ea4cd6bSMika Westerberg mutex_lock(&tb->lock); 1530180b0689SMika Westerberg __tb_disconnect_xdomain_paths(tb, xd, transmit_path, 1531180b0689SMika Westerberg transmit_ring, receive_path, 1532180b0689SMika Westerberg receive_ring); 15337ea4cd6bSMika Westerberg mutex_unlock(&tb->lock); 15347ea4cd6bSMika Westerberg } 15357ea4cd6bSMika Westerberg return 0; 15367ea4cd6bSMika Westerberg } 15377ea4cd6bSMika Westerberg 1538d6cc51cdSAndreas Noever /* hotplug handling */ 1539d6cc51cdSAndreas Noever 1540877e50b3SLee Jones /* 1541d6cc51cdSAndreas Noever * tb_handle_hotplug() - handle hotplug event 1542d6cc51cdSAndreas Noever * 1543d6cc51cdSAndreas Noever * Executes on tb->wq. 1544d6cc51cdSAndreas Noever */ 1545d6cc51cdSAndreas Noever static void tb_handle_hotplug(struct work_struct *work) 1546d6cc51cdSAndreas Noever { 1547d6cc51cdSAndreas Noever struct tb_hotplug_event *ev = container_of(work, typeof(*ev), work); 1548d6cc51cdSAndreas Noever struct tb *tb = ev->tb; 15499d3cce0bSMika Westerberg struct tb_cm *tcm = tb_priv(tb); 1550053596d9SAndreas Noever struct tb_switch *sw; 1551053596d9SAndreas Noever struct tb_port *port; 1552284652a4SMika Westerberg 15536ac6faeeSMika Westerberg /* Bring the domain back from sleep if it was suspended */ 15546ac6faeeSMika Westerberg pm_runtime_get_sync(&tb->dev); 15556ac6faeeSMika Westerberg 1556d6cc51cdSAndreas Noever mutex_lock(&tb->lock); 15579d3cce0bSMika Westerberg if (!tcm->hotplug_active) 1558d6cc51cdSAndreas Noever goto out; /* during init, suspend or shutdown */ 1559d6cc51cdSAndreas Noever 15608f965efdSMika Westerberg sw = tb_switch_find_by_route(tb, ev->route); 1561053596d9SAndreas Noever if (!sw) { 1562053596d9SAndreas Noever tb_warn(tb, 1563053596d9SAndreas Noever "hotplug event from non existent switch %llx:%x (unplug: %d)\n", 1564053596d9SAndreas Noever ev->route, ev->port, ev->unplug); 1565053596d9SAndreas Noever goto out; 1566053596d9SAndreas Noever } 1567053596d9SAndreas Noever if (ev->port > sw->config.max_port_number) { 1568053596d9SAndreas Noever tb_warn(tb, 1569053596d9SAndreas Noever "hotplug event from non existent port %llx:%x (unplug: %d)\n", 1570053596d9SAndreas Noever ev->route, ev->port, ev->unplug); 15718f965efdSMika Westerberg goto put_sw; 1572053596d9SAndreas Noever } 1573053596d9SAndreas Noever port = &sw->ports[ev->port]; 1574053596d9SAndreas Noever if (tb_is_upstream_port(port)) { 1575dfe40ca4SMika Westerberg tb_dbg(tb, "hotplug event for upstream port %llx:%x (unplug: %d)\n", 1576053596d9SAndreas Noever ev->route, ev->port, ev->unplug); 15778f965efdSMika Westerberg goto put_sw; 1578053596d9SAndreas Noever } 15796ac6faeeSMika Westerberg 15806ac6faeeSMika Westerberg pm_runtime_get_sync(&sw->dev); 15816ac6faeeSMika Westerberg 1582053596d9SAndreas Noever if (ev->unplug) { 1583dacb1287SKranthi Kuntala tb_retimer_remove_all(port); 1584dacb1287SKranthi Kuntala 1585dfe40ca4SMika Westerberg if (tb_port_has_remote(port)) { 15867ea4cd6bSMika Westerberg tb_port_dbg(port, "switch unplugged\n"); 1587aae20bb6SLukas Wunner tb_sw_set_unplugged(port->remote->sw); 15883364f0c1SAndreas Noever tb_free_invalid_tunnels(tb); 15898afe909bSMika Westerberg tb_remove_dp_resources(port->remote->sw); 1590cf29b9afSRajmohan Mani tb_switch_tmu_disable(port->remote->sw); 1591de462039SMika Westerberg tb_switch_unconfigure_link(port->remote->sw); 159291c0c120SMika Westerberg tb_switch_lane_bonding_disable(port->remote->sw); 1593bfe778acSMika Westerberg tb_switch_remove(port->remote->sw); 1594053596d9SAndreas Noever port->remote = NULL; 1595dfe40ca4SMika Westerberg if (port->dual_link_port) 1596dfe40ca4SMika Westerberg port->dual_link_port->remote = NULL; 15978afe909bSMika Westerberg /* Maybe we can create another DP tunnel */ 15986ce35635SMika Westerberg tb_recalc_estimated_bandwidth(tb); 15998afe909bSMika Westerberg tb_tunnel_dp(tb); 16007ea4cd6bSMika Westerberg } else if (port->xdomain) { 16017ea4cd6bSMika Westerberg struct tb_xdomain *xd = tb_xdomain_get(port->xdomain); 16027ea4cd6bSMika Westerberg 16037ea4cd6bSMika Westerberg tb_port_dbg(port, "xdomain unplugged\n"); 16047ea4cd6bSMika Westerberg /* 16057ea4cd6bSMika Westerberg * Service drivers are unbound during 16067ea4cd6bSMika Westerberg * tb_xdomain_remove() so setting XDomain as 16077ea4cd6bSMika Westerberg * unplugged here prevents deadlock if they call 16087ea4cd6bSMika Westerberg * tb_xdomain_disable_paths(). We will tear down 1609180b0689SMika Westerberg * all the tunnels below. 16107ea4cd6bSMika Westerberg */ 16117ea4cd6bSMika Westerberg xd->is_unplugged = true; 16127ea4cd6bSMika Westerberg tb_xdomain_remove(xd); 16137ea4cd6bSMika Westerberg port->xdomain = NULL; 1614180b0689SMika Westerberg __tb_disconnect_xdomain_paths(tb, xd, -1, -1, -1, -1); 16157ea4cd6bSMika Westerberg tb_xdomain_put(xd); 1616284652a4SMika Westerberg tb_port_unconfigure_xdomain(port); 16178afe909bSMika Westerberg } else if (tb_port_is_dpout(port) || tb_port_is_dpin(port)) { 16188afe909bSMika Westerberg tb_dp_resource_unavailable(tb, port); 161930a4eca6SMika Westerberg } else if (!port->port) { 162030a4eca6SMika Westerberg tb_sw_dbg(sw, "xHCI disconnect request\n"); 162130a4eca6SMika Westerberg tb_switch_xhci_disconnect(sw); 1622053596d9SAndreas Noever } else { 162362efe699SMika Westerberg tb_port_dbg(port, 1624053596d9SAndreas Noever "got unplug event for disconnected port, ignoring\n"); 1625053596d9SAndreas Noever } 1626053596d9SAndreas Noever } else if (port->remote) { 162762efe699SMika Westerberg tb_port_dbg(port, "got plug event for connected port, ignoring\n"); 162830a4eca6SMika Westerberg } else if (!port->port && sw->authorized) { 162930a4eca6SMika Westerberg tb_sw_dbg(sw, "xHCI connect request\n"); 163030a4eca6SMika Westerberg tb_switch_xhci_connect(sw); 1631053596d9SAndreas Noever } else { 1632344e0643SMika Westerberg if (tb_port_is_null(port)) { 163362efe699SMika Westerberg tb_port_dbg(port, "hotplug: scanning\n"); 1634053596d9SAndreas Noever tb_scan_port(port); 163599cabbb0SMika Westerberg if (!port->remote) 163662efe699SMika Westerberg tb_port_dbg(port, "hotplug: no switch found\n"); 16378afe909bSMika Westerberg } else if (tb_port_is_dpout(port) || tb_port_is_dpin(port)) { 16388afe909bSMika Westerberg tb_dp_resource_available(tb, port); 1639053596d9SAndreas Noever } 1640344e0643SMika Westerberg } 16418f965efdSMika Westerberg 16426ac6faeeSMika Westerberg pm_runtime_mark_last_busy(&sw->dev); 16436ac6faeeSMika Westerberg pm_runtime_put_autosuspend(&sw->dev); 16446ac6faeeSMika Westerberg 16458f965efdSMika Westerberg put_sw: 16468f965efdSMika Westerberg tb_switch_put(sw); 1647d6cc51cdSAndreas Noever out: 1648d6cc51cdSAndreas Noever mutex_unlock(&tb->lock); 16496ac6faeeSMika Westerberg 16506ac6faeeSMika Westerberg pm_runtime_mark_last_busy(&tb->dev); 16516ac6faeeSMika Westerberg pm_runtime_put_autosuspend(&tb->dev); 16526ac6faeeSMika Westerberg 1653d6cc51cdSAndreas Noever kfree(ev); 1654d6cc51cdSAndreas Noever } 1655d6cc51cdSAndreas Noever 16566ce35635SMika Westerberg static int tb_alloc_dp_bandwidth(struct tb_tunnel *tunnel, int *requested_up, 16576ce35635SMika Westerberg int *requested_down) 16586ce35635SMika Westerberg { 16596ce35635SMika Westerberg int allocated_up, allocated_down, available_up, available_down, ret; 16606ce35635SMika Westerberg int requested_up_corrected, requested_down_corrected, granularity; 16616ce35635SMika Westerberg int max_up, max_down, max_up_rounded, max_down_rounded; 16626ce35635SMika Westerberg struct tb *tb = tunnel->tb; 16636ce35635SMika Westerberg struct tb_port *in, *out; 16646ce35635SMika Westerberg 16656ce35635SMika Westerberg ret = tb_tunnel_allocated_bandwidth(tunnel, &allocated_up, &allocated_down); 16666ce35635SMika Westerberg if (ret) 16676ce35635SMika Westerberg return ret; 16686ce35635SMika Westerberg 16696ce35635SMika Westerberg in = tunnel->src_port; 16706ce35635SMika Westerberg out = tunnel->dst_port; 16716ce35635SMika Westerberg 16726ce35635SMika Westerberg tb_port_dbg(in, "bandwidth allocated currently %d/%d Mb/s\n", 16736ce35635SMika Westerberg allocated_up, allocated_down); 16746ce35635SMika Westerberg 16756ce35635SMika Westerberg /* 16766ce35635SMika Westerberg * If we get rounded up request from graphics side, say HBR2 x 4 16776ce35635SMika Westerberg * that is 17500 instead of 17280 (this is because of the 16786ce35635SMika Westerberg * granularity), we allow it too. Here the graphics has already 16796ce35635SMika Westerberg * negotiated with the DPRX the maximum possible rates (which is 16806ce35635SMika Westerberg * 17280 in this case). 16816ce35635SMika Westerberg * 16826ce35635SMika Westerberg * Since the link cannot go higher than 17280 we use that in our 16836ce35635SMika Westerberg * calculations but the DP IN adapter Allocated BW write must be 16846ce35635SMika Westerberg * the same value (17500) otherwise the adapter will mark it as 16856ce35635SMika Westerberg * failed for graphics. 16866ce35635SMika Westerberg */ 16876ce35635SMika Westerberg ret = tb_tunnel_maximum_bandwidth(tunnel, &max_up, &max_down); 16886ce35635SMika Westerberg if (ret) 16896ce35635SMika Westerberg return ret; 16906ce35635SMika Westerberg 16916ce35635SMika Westerberg ret = usb4_dp_port_granularity(in); 16926ce35635SMika Westerberg if (ret < 0) 16936ce35635SMika Westerberg return ret; 16946ce35635SMika Westerberg granularity = ret; 16956ce35635SMika Westerberg 16966ce35635SMika Westerberg max_up_rounded = roundup(max_up, granularity); 16976ce35635SMika Westerberg max_down_rounded = roundup(max_down, granularity); 16986ce35635SMika Westerberg 16996ce35635SMika Westerberg /* 17006ce35635SMika Westerberg * This will "fix" the request down to the maximum supported 17016ce35635SMika Westerberg * rate * lanes if it is at the maximum rounded up level. 17026ce35635SMika Westerberg */ 17036ce35635SMika Westerberg requested_up_corrected = *requested_up; 17046ce35635SMika Westerberg if (requested_up_corrected == max_up_rounded) 17056ce35635SMika Westerberg requested_up_corrected = max_up; 17066ce35635SMika Westerberg else if (requested_up_corrected < 0) 17076ce35635SMika Westerberg requested_up_corrected = 0; 17086ce35635SMika Westerberg requested_down_corrected = *requested_down; 17096ce35635SMika Westerberg if (requested_down_corrected == max_down_rounded) 17106ce35635SMika Westerberg requested_down_corrected = max_down; 17116ce35635SMika Westerberg else if (requested_down_corrected < 0) 17126ce35635SMika Westerberg requested_down_corrected = 0; 17136ce35635SMika Westerberg 17146ce35635SMika Westerberg tb_port_dbg(in, "corrected bandwidth request %d/%d Mb/s\n", 17156ce35635SMika Westerberg requested_up_corrected, requested_down_corrected); 17166ce35635SMika Westerberg 17176ce35635SMika Westerberg if ((*requested_up >= 0 && requested_up_corrected > max_up_rounded) || 17186ce35635SMika Westerberg (*requested_down >= 0 && requested_down_corrected > max_down_rounded)) { 17196ce35635SMika Westerberg tb_port_dbg(in, "bandwidth request too high (%d/%d Mb/s > %d/%d Mb/s)\n", 17206ce35635SMika Westerberg requested_up_corrected, requested_down_corrected, 17216ce35635SMika Westerberg max_up_rounded, max_down_rounded); 17226ce35635SMika Westerberg return -ENOBUFS; 17236ce35635SMika Westerberg } 17246ce35635SMika Westerberg 17256ce35635SMika Westerberg if ((*requested_up >= 0 && requested_up_corrected <= allocated_up) || 17266ce35635SMika Westerberg (*requested_down >= 0 && requested_down_corrected <= allocated_down)) { 17276ce35635SMika Westerberg /* 17286ce35635SMika Westerberg * If requested bandwidth is less or equal than what is 17296ce35635SMika Westerberg * currently allocated to that tunnel we simply change 17306ce35635SMika Westerberg * the reservation of the tunnel. Since all the tunnels 17316ce35635SMika Westerberg * going out from the same USB4 port are in the same 17326ce35635SMika Westerberg * group the released bandwidth will be taken into 17336ce35635SMika Westerberg * account for the other tunnels automatically below. 17346ce35635SMika Westerberg */ 17356ce35635SMika Westerberg return tb_tunnel_alloc_bandwidth(tunnel, requested_up, 17366ce35635SMika Westerberg requested_down); 17376ce35635SMika Westerberg } 17386ce35635SMika Westerberg 17396ce35635SMika Westerberg /* 17406ce35635SMika Westerberg * More bandwidth is requested. Release all the potential 17416ce35635SMika Westerberg * bandwidth from USB3 first. 17426ce35635SMika Westerberg */ 17436ce35635SMika Westerberg ret = tb_release_unused_usb3_bandwidth(tb, in, out); 17446ce35635SMika Westerberg if (ret) 17456ce35635SMika Westerberg return ret; 17466ce35635SMika Westerberg 17476ce35635SMika Westerberg /* 17486ce35635SMika Westerberg * Then go over all tunnels that cross the same USB4 ports (they 17496ce35635SMika Westerberg * are also in the same group but we use the same function here 17506ce35635SMika Westerberg * that we use with the normal bandwidth allocation). 17516ce35635SMika Westerberg */ 17526ce35635SMika Westerberg ret = tb_available_bandwidth(tb, in, out, &available_up, &available_down); 17536ce35635SMika Westerberg if (ret) 17546ce35635SMika Westerberg goto reclaim; 17556ce35635SMika Westerberg 17566ce35635SMika Westerberg tb_port_dbg(in, "bandwidth available for allocation %d/%d Mb/s\n", 17576ce35635SMika Westerberg available_up, available_down); 17586ce35635SMika Westerberg 17596ce35635SMika Westerberg if ((*requested_up >= 0 && available_up >= requested_up_corrected) || 17606ce35635SMika Westerberg (*requested_down >= 0 && available_down >= requested_down_corrected)) { 17616ce35635SMika Westerberg ret = tb_tunnel_alloc_bandwidth(tunnel, requested_up, 17626ce35635SMika Westerberg requested_down); 17636ce35635SMika Westerberg } else { 17646ce35635SMika Westerberg ret = -ENOBUFS; 17656ce35635SMika Westerberg } 17666ce35635SMika Westerberg 17676ce35635SMika Westerberg reclaim: 17686ce35635SMika Westerberg tb_reclaim_usb3_bandwidth(tb, in, out); 17696ce35635SMika Westerberg return ret; 17706ce35635SMika Westerberg } 17716ce35635SMika Westerberg 17726ce35635SMika Westerberg static void tb_handle_dp_bandwidth_request(struct work_struct *work) 17736ce35635SMika Westerberg { 17746ce35635SMika Westerberg struct tb_hotplug_event *ev = container_of(work, typeof(*ev), work); 17756ce35635SMika Westerberg int requested_bw, requested_up, requested_down, ret; 17766ce35635SMika Westerberg struct tb_port *in, *out; 17776ce35635SMika Westerberg struct tb_tunnel *tunnel; 17786ce35635SMika Westerberg struct tb *tb = ev->tb; 17796ce35635SMika Westerberg struct tb_cm *tcm = tb_priv(tb); 17806ce35635SMika Westerberg struct tb_switch *sw; 17816ce35635SMika Westerberg 17826ce35635SMika Westerberg pm_runtime_get_sync(&tb->dev); 17836ce35635SMika Westerberg 17846ce35635SMika Westerberg mutex_lock(&tb->lock); 17856ce35635SMika Westerberg if (!tcm->hotplug_active) 17866ce35635SMika Westerberg goto unlock; 17876ce35635SMika Westerberg 17886ce35635SMika Westerberg sw = tb_switch_find_by_route(tb, ev->route); 17896ce35635SMika Westerberg if (!sw) { 17906ce35635SMika Westerberg tb_warn(tb, "bandwidth request from non-existent router %llx\n", 17916ce35635SMika Westerberg ev->route); 17926ce35635SMika Westerberg goto unlock; 17936ce35635SMika Westerberg } 17946ce35635SMika Westerberg 17956ce35635SMika Westerberg in = &sw->ports[ev->port]; 17966ce35635SMika Westerberg if (!tb_port_is_dpin(in)) { 17976ce35635SMika Westerberg tb_port_warn(in, "bandwidth request to non-DP IN adapter\n"); 17986ce35635SMika Westerberg goto unlock; 17996ce35635SMika Westerberg } 18006ce35635SMika Westerberg 18016ce35635SMika Westerberg tb_port_dbg(in, "handling bandwidth allocation request\n"); 18026ce35635SMika Westerberg 18036ce35635SMika Westerberg if (!usb4_dp_port_bw_mode_enabled(in)) { 18046ce35635SMika Westerberg tb_port_warn(in, "bandwidth allocation mode not enabled\n"); 18056ce35635SMika Westerberg goto unlock; 18066ce35635SMika Westerberg } 18076ce35635SMika Westerberg 1808ace75e18SMika Westerberg ret = usb4_dp_port_requested_bw(in); 1809ace75e18SMika Westerberg if (ret < 0) { 1810ace75e18SMika Westerberg if (ret == -ENODATA) 18116ce35635SMika Westerberg tb_port_dbg(in, "no bandwidth request active\n"); 1812ace75e18SMika Westerberg else 1813ace75e18SMika Westerberg tb_port_warn(in, "failed to read requested bandwidth\n"); 18146ce35635SMika Westerberg goto unlock; 18156ce35635SMika Westerberg } 1816ace75e18SMika Westerberg requested_bw = ret; 18176ce35635SMika Westerberg 18186ce35635SMika Westerberg tb_port_dbg(in, "requested bandwidth %d Mb/s\n", requested_bw); 18196ce35635SMika Westerberg 18206ce35635SMika Westerberg tunnel = tb_find_tunnel(tb, TB_TUNNEL_DP, in, NULL); 18216ce35635SMika Westerberg if (!tunnel) { 18226ce35635SMika Westerberg tb_port_warn(in, "failed to find tunnel\n"); 18236ce35635SMika Westerberg goto unlock; 18246ce35635SMika Westerberg } 18256ce35635SMika Westerberg 18266ce35635SMika Westerberg out = tunnel->dst_port; 18276ce35635SMika Westerberg 18286ce35635SMika Westerberg if (in->sw->config.depth < out->sw->config.depth) { 18296ce35635SMika Westerberg requested_up = -1; 18306ce35635SMika Westerberg requested_down = requested_bw; 18316ce35635SMika Westerberg } else { 18326ce35635SMika Westerberg requested_up = requested_bw; 18336ce35635SMika Westerberg requested_down = -1; 18346ce35635SMika Westerberg } 18356ce35635SMika Westerberg 18366ce35635SMika Westerberg ret = tb_alloc_dp_bandwidth(tunnel, &requested_up, &requested_down); 18376ce35635SMika Westerberg if (ret) { 18386ce35635SMika Westerberg if (ret == -ENOBUFS) 18396ce35635SMika Westerberg tb_port_warn(in, "not enough bandwidth available\n"); 18406ce35635SMika Westerberg else 18416ce35635SMika Westerberg tb_port_warn(in, "failed to change bandwidth allocation\n"); 18426ce35635SMika Westerberg } else { 18436ce35635SMika Westerberg tb_port_dbg(in, "bandwidth allocation changed to %d/%d Mb/s\n", 18446ce35635SMika Westerberg requested_up, requested_down); 18456ce35635SMika Westerberg 18466ce35635SMika Westerberg /* Update other clients about the allocation change */ 18476ce35635SMika Westerberg tb_recalc_estimated_bandwidth(tb); 18486ce35635SMika Westerberg } 18496ce35635SMika Westerberg 18506ce35635SMika Westerberg unlock: 18516ce35635SMika Westerberg mutex_unlock(&tb->lock); 18526ce35635SMika Westerberg 18536ce35635SMika Westerberg pm_runtime_mark_last_busy(&tb->dev); 18546ce35635SMika Westerberg pm_runtime_put_autosuspend(&tb->dev); 18556ce35635SMika Westerberg } 18566ce35635SMika Westerberg 18576ce35635SMika Westerberg static void tb_queue_dp_bandwidth_request(struct tb *tb, u64 route, u8 port) 18586ce35635SMika Westerberg { 18596ce35635SMika Westerberg struct tb_hotplug_event *ev; 18606ce35635SMika Westerberg 18616ce35635SMika Westerberg ev = kmalloc(sizeof(*ev), GFP_KERNEL); 18626ce35635SMika Westerberg if (!ev) 18636ce35635SMika Westerberg return; 18646ce35635SMika Westerberg 18656ce35635SMika Westerberg ev->tb = tb; 18666ce35635SMika Westerberg ev->route = route; 18676ce35635SMika Westerberg ev->port = port; 18686ce35635SMika Westerberg INIT_WORK(&ev->work, tb_handle_dp_bandwidth_request); 18696ce35635SMika Westerberg queue_work(tb->wq, &ev->work); 18706ce35635SMika Westerberg } 18716ce35635SMika Westerberg 18726ce35635SMika Westerberg static void tb_handle_notification(struct tb *tb, u64 route, 18736ce35635SMika Westerberg const struct cfg_error_pkg *error) 18746ce35635SMika Westerberg { 18756ce35635SMika Westerberg if (tb_cfg_ack_notification(tb->ctl, route, error)) 18766ce35635SMika Westerberg tb_warn(tb, "could not ack notification on %llx\n", route); 18776ce35635SMika Westerberg 18786ce35635SMika Westerberg switch (error->error) { 18796ce35635SMika Westerberg case TB_CFG_ERROR_DP_BW: 18806ce35635SMika Westerberg tb_queue_dp_bandwidth_request(tb, route, error->port); 18816ce35635SMika Westerberg break; 18826ce35635SMika Westerberg 18836ce35635SMika Westerberg default: 18846ce35635SMika Westerberg /* Ack is enough */ 18856ce35635SMika Westerberg return; 18866ce35635SMika Westerberg } 18876ce35635SMika Westerberg } 18886ce35635SMika Westerberg 1889877e50b3SLee Jones /* 1890d6cc51cdSAndreas Noever * tb_schedule_hotplug_handler() - callback function for the control channel 1891d6cc51cdSAndreas Noever * 1892d6cc51cdSAndreas Noever * Delegates to tb_handle_hotplug. 1893d6cc51cdSAndreas Noever */ 189481a54b5eSMika Westerberg static void tb_handle_event(struct tb *tb, enum tb_cfg_pkg_type type, 189581a54b5eSMika Westerberg const void *buf, size_t size) 1896d6cc51cdSAndreas Noever { 189781a54b5eSMika Westerberg const struct cfg_event_pkg *pkg = buf; 18986ce35635SMika Westerberg u64 route = tb_cfg_get_route(&pkg->header); 189981a54b5eSMika Westerberg 19006ce35635SMika Westerberg switch (type) { 19016ce35635SMika Westerberg case TB_CFG_PKG_ERROR: 19026ce35635SMika Westerberg tb_handle_notification(tb, route, (const struct cfg_error_pkg *)buf); 19036ce35635SMika Westerberg return; 19046ce35635SMika Westerberg case TB_CFG_PKG_EVENT: 19056ce35635SMika Westerberg break; 19066ce35635SMika Westerberg default: 190781a54b5eSMika Westerberg tb_warn(tb, "unexpected event %#x, ignoring\n", type); 190881a54b5eSMika Westerberg return; 190981a54b5eSMika Westerberg } 191081a54b5eSMika Westerberg 1911210e9f56SMika Westerberg if (tb_cfg_ack_plug(tb->ctl, route, pkg->port, pkg->unplug)) { 191281a54b5eSMika Westerberg tb_warn(tb, "could not ack plug event on %llx:%x\n", route, 191381a54b5eSMika Westerberg pkg->port); 191481a54b5eSMika Westerberg } 191581a54b5eSMika Westerberg 19164f807e47SMika Westerberg tb_queue_hotplug(tb, route, pkg->port, pkg->unplug); 1917d6cc51cdSAndreas Noever } 1918d6cc51cdSAndreas Noever 19199d3cce0bSMika Westerberg static void tb_stop(struct tb *tb) 1920d6cc51cdSAndreas Noever { 19219d3cce0bSMika Westerberg struct tb_cm *tcm = tb_priv(tb); 192293f36adeSMika Westerberg struct tb_tunnel *tunnel; 192393f36adeSMika Westerberg struct tb_tunnel *n; 19243364f0c1SAndreas Noever 19256ac6faeeSMika Westerberg cancel_delayed_work(&tcm->remove_work); 19263364f0c1SAndreas Noever /* tunnels are only present after everything has been initialized */ 19277ea4cd6bSMika Westerberg list_for_each_entry_safe(tunnel, n, &tcm->tunnel_list, list) { 19287ea4cd6bSMika Westerberg /* 19297ea4cd6bSMika Westerberg * DMA tunnels require the driver to be functional so we 19307ea4cd6bSMika Westerberg * tear them down. Other protocol tunnels can be left 19317ea4cd6bSMika Westerberg * intact. 19327ea4cd6bSMika Westerberg */ 19337ea4cd6bSMika Westerberg if (tb_tunnel_is_dma(tunnel)) 19347ea4cd6bSMika Westerberg tb_tunnel_deactivate(tunnel); 193593f36adeSMika Westerberg tb_tunnel_free(tunnel); 19367ea4cd6bSMika Westerberg } 1937bfe778acSMika Westerberg tb_switch_remove(tb->root_switch); 19389d3cce0bSMika Westerberg tcm->hotplug_active = false; /* signal tb_handle_hotplug to quit */ 1939d6cc51cdSAndreas Noever } 1940d6cc51cdSAndreas Noever 194199cabbb0SMika Westerberg static int tb_scan_finalize_switch(struct device *dev, void *data) 194299cabbb0SMika Westerberg { 194399cabbb0SMika Westerberg if (tb_is_switch(dev)) { 194499cabbb0SMika Westerberg struct tb_switch *sw = tb_to_switch(dev); 194599cabbb0SMika Westerberg 194699cabbb0SMika Westerberg /* 194799cabbb0SMika Westerberg * If we found that the switch was already setup by the 194899cabbb0SMika Westerberg * boot firmware, mark it as authorized now before we 194999cabbb0SMika Westerberg * send uevent to userspace. 195099cabbb0SMika Westerberg */ 195199cabbb0SMika Westerberg if (sw->boot) 195299cabbb0SMika Westerberg sw->authorized = 1; 195399cabbb0SMika Westerberg 195499cabbb0SMika Westerberg dev_set_uevent_suppress(dev, false); 195599cabbb0SMika Westerberg kobject_uevent(&dev->kobj, KOBJ_ADD); 195699cabbb0SMika Westerberg device_for_each_child(dev, NULL, tb_scan_finalize_switch); 195799cabbb0SMika Westerberg } 195899cabbb0SMika Westerberg 195999cabbb0SMika Westerberg return 0; 196099cabbb0SMika Westerberg } 196199cabbb0SMika Westerberg 19629d3cce0bSMika Westerberg static int tb_start(struct tb *tb) 1963d6cc51cdSAndreas Noever { 19649d3cce0bSMika Westerberg struct tb_cm *tcm = tb_priv(tb); 1965bfe778acSMika Westerberg int ret; 1966d6cc51cdSAndreas Noever 1967bfe778acSMika Westerberg tb->root_switch = tb_switch_alloc(tb, &tb->dev, 0); 1968444ac384SMika Westerberg if (IS_ERR(tb->root_switch)) 1969444ac384SMika Westerberg return PTR_ERR(tb->root_switch); 1970a25c8b2fSAndreas Noever 1971e6b245ccSMika Westerberg /* 1972e6b245ccSMika Westerberg * ICM firmware upgrade needs running firmware and in native 1973e6b245ccSMika Westerberg * mode that is not available so disable firmware upgrade of the 1974e6b245ccSMika Westerberg * root switch. 19755172eb9aSSzuying Chen * 19765172eb9aSSzuying Chen * However, USB4 routers support NVM firmware upgrade if they 19775172eb9aSSzuying Chen * implement the necessary router operations. 1978e6b245ccSMika Westerberg */ 19795172eb9aSSzuying Chen tb->root_switch->no_nvm_upgrade = !tb_switch_is_usb4(tb->root_switch); 19806ac6faeeSMika Westerberg /* All USB4 routers support runtime PM */ 19816ac6faeeSMika Westerberg tb->root_switch->rpm = tb_switch_is_usb4(tb->root_switch); 1982e6b245ccSMika Westerberg 1983bfe778acSMika Westerberg ret = tb_switch_configure(tb->root_switch); 1984bfe778acSMika Westerberg if (ret) { 1985bfe778acSMika Westerberg tb_switch_put(tb->root_switch); 1986bfe778acSMika Westerberg return ret; 1987bfe778acSMika Westerberg } 1988bfe778acSMika Westerberg 1989bfe778acSMika Westerberg /* Announce the switch to the world */ 1990bfe778acSMika Westerberg ret = tb_switch_add(tb->root_switch); 1991bfe778acSMika Westerberg if (ret) { 1992bfe778acSMika Westerberg tb_switch_put(tb->root_switch); 1993bfe778acSMika Westerberg return ret; 1994bfe778acSMika Westerberg } 1995bfe778acSMika Westerberg 1996b017a46dSGil Fine /* 1997b017a46dSGil Fine * To support highest CLx state, we set host router's TMU to 1998b017a46dSGil Fine * Normal mode. 1999b017a46dSGil Fine */ 2000b017a46dSGil Fine tb_switch_tmu_configure(tb->root_switch, TB_SWITCH_TMU_RATE_NORMAL, 2001b017a46dSGil Fine false); 2002cf29b9afSRajmohan Mani /* Enable TMU if it is off */ 2003cf29b9afSRajmohan Mani tb_switch_tmu_enable(tb->root_switch); 20049da672a4SAndreas Noever /* Full scan to discover devices added before the driver was loaded. */ 20059da672a4SAndreas Noever tb_scan_switch(tb->root_switch); 20060414bec5SMika Westerberg /* Find out tunnels created by the boot firmware */ 200743bddb26SMika Westerberg tb_discover_tunnels(tb); 2008b60e31bfSSanjay R Mehta /* Add DP resources from the DP tunnels created by the boot firmware */ 2009b60e31bfSSanjay R Mehta tb_discover_dp_resources(tb); 2010e6f81858SRajmohan Mani /* 2011e6f81858SRajmohan Mani * If the boot firmware did not create USB 3.x tunnels create them 2012e6f81858SRajmohan Mani * now for the whole topology. 2013e6f81858SRajmohan Mani */ 2014e6f81858SRajmohan Mani tb_create_usb3_tunnels(tb->root_switch); 20158afe909bSMika Westerberg /* Add DP IN resources for the root switch */ 20168afe909bSMika Westerberg tb_add_dp_resources(tb->root_switch); 201799cabbb0SMika Westerberg /* Make the discovered switches available to the userspace */ 201899cabbb0SMika Westerberg device_for_each_child(&tb->root_switch->dev, NULL, 201999cabbb0SMika Westerberg tb_scan_finalize_switch); 20209da672a4SAndreas Noever 2021d6cc51cdSAndreas Noever /* Allow tb_handle_hotplug to progress events */ 20229d3cce0bSMika Westerberg tcm->hotplug_active = true; 20239d3cce0bSMika Westerberg return 0; 2024d6cc51cdSAndreas Noever } 2025d6cc51cdSAndreas Noever 20269d3cce0bSMika Westerberg static int tb_suspend_noirq(struct tb *tb) 202723dd5bb4SAndreas Noever { 20289d3cce0bSMika Westerberg struct tb_cm *tcm = tb_priv(tb); 20299d3cce0bSMika Westerberg 2030daa5140fSMika Westerberg tb_dbg(tb, "suspending...\n"); 203181a2e3e4SMika Westerberg tb_disconnect_and_release_dp(tb); 20326ac6faeeSMika Westerberg tb_switch_suspend(tb->root_switch, false); 20339d3cce0bSMika Westerberg tcm->hotplug_active = false; /* signal tb_handle_hotplug to quit */ 2034daa5140fSMika Westerberg tb_dbg(tb, "suspend finished\n"); 20359d3cce0bSMika Westerberg 20369d3cce0bSMika Westerberg return 0; 203723dd5bb4SAndreas Noever } 203823dd5bb4SAndreas Noever 203991c0c120SMika Westerberg static void tb_restore_children(struct tb_switch *sw) 204091c0c120SMika Westerberg { 204191c0c120SMika Westerberg struct tb_port *port; 204291c0c120SMika Westerberg 20436ac6faeeSMika Westerberg /* No need to restore if the router is already unplugged */ 20446ac6faeeSMika Westerberg if (sw->is_unplugged) 20456ac6faeeSMika Westerberg return; 20466ac6faeeSMika Westerberg 20471a9b6cb8SMika Westerberg if (tb_enable_clx(sw)) 20481a9b6cb8SMika Westerberg tb_sw_warn(sw, "failed to re-enable CL states\n"); 2049b017a46dSGil Fine 2050cf29b9afSRajmohan Mani if (tb_enable_tmu(sw)) 2051cf29b9afSRajmohan Mani tb_sw_warn(sw, "failed to restore TMU configuration\n"); 2052cf29b9afSRajmohan Mani 205391c0c120SMika Westerberg tb_switch_for_each_port(sw, port) { 2054284652a4SMika Westerberg if (!tb_port_has_remote(port) && !port->xdomain) 205591c0c120SMika Westerberg continue; 205691c0c120SMika Westerberg 2057284652a4SMika Westerberg if (port->remote) { 20582ca3263aSMika Westerberg tb_switch_lane_bonding_enable(port->remote->sw); 2059de462039SMika Westerberg tb_switch_configure_link(port->remote->sw); 206091c0c120SMika Westerberg 206191c0c120SMika Westerberg tb_restore_children(port->remote->sw); 2062284652a4SMika Westerberg } else if (port->xdomain) { 2063f9cad07bSMika Westerberg tb_port_configure_xdomain(port, port->xdomain); 2064284652a4SMika Westerberg } 206591c0c120SMika Westerberg } 206691c0c120SMika Westerberg } 206791c0c120SMika Westerberg 20689d3cce0bSMika Westerberg static int tb_resume_noirq(struct tb *tb) 206923dd5bb4SAndreas Noever { 20709d3cce0bSMika Westerberg struct tb_cm *tcm = tb_priv(tb); 207193f36adeSMika Westerberg struct tb_tunnel *tunnel, *n; 207243bddb26SMika Westerberg unsigned int usb3_delay = 0; 207343bddb26SMika Westerberg LIST_HEAD(tunnels); 20749d3cce0bSMika Westerberg 2075daa5140fSMika Westerberg tb_dbg(tb, "resuming...\n"); 207623dd5bb4SAndreas Noever 207723dd5bb4SAndreas Noever /* remove any pci devices the firmware might have setup */ 2078356b6c4eSMika Westerberg tb_switch_reset(tb->root_switch); 207923dd5bb4SAndreas Noever 208023dd5bb4SAndreas Noever tb_switch_resume(tb->root_switch); 208123dd5bb4SAndreas Noever tb_free_invalid_tunnels(tb); 208223dd5bb4SAndreas Noever tb_free_unplugged_children(tb->root_switch); 208391c0c120SMika Westerberg tb_restore_children(tb->root_switch); 208443bddb26SMika Westerberg 208543bddb26SMika Westerberg /* 208643bddb26SMika Westerberg * If we get here from suspend to disk the boot firmware or the 208743bddb26SMika Westerberg * restore kernel might have created tunnels of its own. Since 208843bddb26SMika Westerberg * we cannot be sure they are usable for us we find and tear 208943bddb26SMika Westerberg * them down. 209043bddb26SMika Westerberg */ 209143bddb26SMika Westerberg tb_switch_discover_tunnels(tb->root_switch, &tunnels, false); 209243bddb26SMika Westerberg list_for_each_entry_safe_reverse(tunnel, n, &tunnels, list) { 209343bddb26SMika Westerberg if (tb_tunnel_is_usb3(tunnel)) 209443bddb26SMika Westerberg usb3_delay = 500; 209543bddb26SMika Westerberg tb_tunnel_deactivate(tunnel); 209643bddb26SMika Westerberg tb_tunnel_free(tunnel); 209743bddb26SMika Westerberg } 209843bddb26SMika Westerberg 209943bddb26SMika Westerberg /* Re-create our tunnels now */ 210043bddb26SMika Westerberg list_for_each_entry_safe(tunnel, n, &tcm->tunnel_list, list) { 210143bddb26SMika Westerberg /* USB3 requires delay before it can be re-activated */ 210243bddb26SMika Westerberg if (tb_tunnel_is_usb3(tunnel)) { 210343bddb26SMika Westerberg msleep(usb3_delay); 210443bddb26SMika Westerberg /* Only need to do it once */ 210543bddb26SMika Westerberg usb3_delay = 0; 210643bddb26SMika Westerberg } 210793f36adeSMika Westerberg tb_tunnel_restart(tunnel); 210843bddb26SMika Westerberg } 21099d3cce0bSMika Westerberg if (!list_empty(&tcm->tunnel_list)) { 211023dd5bb4SAndreas Noever /* 211123dd5bb4SAndreas Noever * the pcie links need some time to get going. 211223dd5bb4SAndreas Noever * 100ms works for me... 211323dd5bb4SAndreas Noever */ 2114daa5140fSMika Westerberg tb_dbg(tb, "tunnels restarted, sleeping for 100ms\n"); 211523dd5bb4SAndreas Noever msleep(100); 211623dd5bb4SAndreas Noever } 211723dd5bb4SAndreas Noever /* Allow tb_handle_hotplug to progress events */ 21189d3cce0bSMika Westerberg tcm->hotplug_active = true; 2119daa5140fSMika Westerberg tb_dbg(tb, "resume finished\n"); 21209d3cce0bSMika Westerberg 21219d3cce0bSMika Westerberg return 0; 21229d3cce0bSMika Westerberg } 21239d3cce0bSMika Westerberg 21247ea4cd6bSMika Westerberg static int tb_free_unplugged_xdomains(struct tb_switch *sw) 21257ea4cd6bSMika Westerberg { 2126b433d010SMika Westerberg struct tb_port *port; 2127b433d010SMika Westerberg int ret = 0; 21287ea4cd6bSMika Westerberg 2129b433d010SMika Westerberg tb_switch_for_each_port(sw, port) { 21307ea4cd6bSMika Westerberg if (tb_is_upstream_port(port)) 21317ea4cd6bSMika Westerberg continue; 21327ea4cd6bSMika Westerberg if (port->xdomain && port->xdomain->is_unplugged) { 2133dacb1287SKranthi Kuntala tb_retimer_remove_all(port); 21347ea4cd6bSMika Westerberg tb_xdomain_remove(port->xdomain); 2135284652a4SMika Westerberg tb_port_unconfigure_xdomain(port); 21367ea4cd6bSMika Westerberg port->xdomain = NULL; 21377ea4cd6bSMika Westerberg ret++; 21387ea4cd6bSMika Westerberg } else if (port->remote) { 21397ea4cd6bSMika Westerberg ret += tb_free_unplugged_xdomains(port->remote->sw); 21407ea4cd6bSMika Westerberg } 21417ea4cd6bSMika Westerberg } 21427ea4cd6bSMika Westerberg 21437ea4cd6bSMika Westerberg return ret; 21447ea4cd6bSMika Westerberg } 21457ea4cd6bSMika Westerberg 2146884e4d57SMika Westerberg static int tb_freeze_noirq(struct tb *tb) 2147884e4d57SMika Westerberg { 2148884e4d57SMika Westerberg struct tb_cm *tcm = tb_priv(tb); 2149884e4d57SMika Westerberg 2150884e4d57SMika Westerberg tcm->hotplug_active = false; 2151884e4d57SMika Westerberg return 0; 2152884e4d57SMika Westerberg } 2153884e4d57SMika Westerberg 2154884e4d57SMika Westerberg static int tb_thaw_noirq(struct tb *tb) 2155884e4d57SMika Westerberg { 2156884e4d57SMika Westerberg struct tb_cm *tcm = tb_priv(tb); 2157884e4d57SMika Westerberg 2158884e4d57SMika Westerberg tcm->hotplug_active = true; 2159884e4d57SMika Westerberg return 0; 2160884e4d57SMika Westerberg } 2161884e4d57SMika Westerberg 21627ea4cd6bSMika Westerberg static void tb_complete(struct tb *tb) 21637ea4cd6bSMika Westerberg { 21647ea4cd6bSMika Westerberg /* 21657ea4cd6bSMika Westerberg * Release any unplugged XDomains and if there is a case where 21667ea4cd6bSMika Westerberg * another domain is swapped in place of unplugged XDomain we 21677ea4cd6bSMika Westerberg * need to run another rescan. 21687ea4cd6bSMika Westerberg */ 21697ea4cd6bSMika Westerberg mutex_lock(&tb->lock); 21707ea4cd6bSMika Westerberg if (tb_free_unplugged_xdomains(tb->root_switch)) 21717ea4cd6bSMika Westerberg tb_scan_switch(tb->root_switch); 21727ea4cd6bSMika Westerberg mutex_unlock(&tb->lock); 21737ea4cd6bSMika Westerberg } 21747ea4cd6bSMika Westerberg 21756ac6faeeSMika Westerberg static int tb_runtime_suspend(struct tb *tb) 21766ac6faeeSMika Westerberg { 21776ac6faeeSMika Westerberg struct tb_cm *tcm = tb_priv(tb); 21786ac6faeeSMika Westerberg 21796ac6faeeSMika Westerberg mutex_lock(&tb->lock); 21806ac6faeeSMika Westerberg tb_switch_suspend(tb->root_switch, true); 21816ac6faeeSMika Westerberg tcm->hotplug_active = false; 21826ac6faeeSMika Westerberg mutex_unlock(&tb->lock); 21836ac6faeeSMika Westerberg 21846ac6faeeSMika Westerberg return 0; 21856ac6faeeSMika Westerberg } 21866ac6faeeSMika Westerberg 21876ac6faeeSMika Westerberg static void tb_remove_work(struct work_struct *work) 21886ac6faeeSMika Westerberg { 21896ac6faeeSMika Westerberg struct tb_cm *tcm = container_of(work, struct tb_cm, remove_work.work); 21906ac6faeeSMika Westerberg struct tb *tb = tcm_to_tb(tcm); 21916ac6faeeSMika Westerberg 21926ac6faeeSMika Westerberg mutex_lock(&tb->lock); 21936ac6faeeSMika Westerberg if (tb->root_switch) { 21946ac6faeeSMika Westerberg tb_free_unplugged_children(tb->root_switch); 21956ac6faeeSMika Westerberg tb_free_unplugged_xdomains(tb->root_switch); 21966ac6faeeSMika Westerberg } 21976ac6faeeSMika Westerberg mutex_unlock(&tb->lock); 21986ac6faeeSMika Westerberg } 21996ac6faeeSMika Westerberg 22006ac6faeeSMika Westerberg static int tb_runtime_resume(struct tb *tb) 22016ac6faeeSMika Westerberg { 22026ac6faeeSMika Westerberg struct tb_cm *tcm = tb_priv(tb); 22036ac6faeeSMika Westerberg struct tb_tunnel *tunnel, *n; 22046ac6faeeSMika Westerberg 22056ac6faeeSMika Westerberg mutex_lock(&tb->lock); 22066ac6faeeSMika Westerberg tb_switch_resume(tb->root_switch); 22076ac6faeeSMika Westerberg tb_free_invalid_tunnels(tb); 22086ac6faeeSMika Westerberg tb_restore_children(tb->root_switch); 22096ac6faeeSMika Westerberg list_for_each_entry_safe(tunnel, n, &tcm->tunnel_list, list) 22106ac6faeeSMika Westerberg tb_tunnel_restart(tunnel); 22116ac6faeeSMika Westerberg tcm->hotplug_active = true; 22126ac6faeeSMika Westerberg mutex_unlock(&tb->lock); 22136ac6faeeSMika Westerberg 22146ac6faeeSMika Westerberg /* 22156ac6faeeSMika Westerberg * Schedule cleanup of any unplugged devices. Run this in a 22166ac6faeeSMika Westerberg * separate thread to avoid possible deadlock if the device 22176ac6faeeSMika Westerberg * removal runtime resumes the unplugged device. 22186ac6faeeSMika Westerberg */ 22196ac6faeeSMika Westerberg queue_delayed_work(tb->wq, &tcm->remove_work, msecs_to_jiffies(50)); 22206ac6faeeSMika Westerberg return 0; 22216ac6faeeSMika Westerberg } 22226ac6faeeSMika Westerberg 22239d3cce0bSMika Westerberg static const struct tb_cm_ops tb_cm_ops = { 22249d3cce0bSMika Westerberg .start = tb_start, 22259d3cce0bSMika Westerberg .stop = tb_stop, 22269d3cce0bSMika Westerberg .suspend_noirq = tb_suspend_noirq, 22279d3cce0bSMika Westerberg .resume_noirq = tb_resume_noirq, 2228884e4d57SMika Westerberg .freeze_noirq = tb_freeze_noirq, 2229884e4d57SMika Westerberg .thaw_noirq = tb_thaw_noirq, 22307ea4cd6bSMika Westerberg .complete = tb_complete, 22316ac6faeeSMika Westerberg .runtime_suspend = tb_runtime_suspend, 22326ac6faeeSMika Westerberg .runtime_resume = tb_runtime_resume, 223381a54b5eSMika Westerberg .handle_event = tb_handle_event, 22343da88be2SMika Westerberg .disapprove_switch = tb_disconnect_pci, 223599cabbb0SMika Westerberg .approve_switch = tb_tunnel_pci, 22367ea4cd6bSMika Westerberg .approve_xdomain_paths = tb_approve_xdomain_paths, 22377ea4cd6bSMika Westerberg .disconnect_xdomain_paths = tb_disconnect_xdomain_paths, 22389d3cce0bSMika Westerberg }; 22399d3cce0bSMika Westerberg 2240349bfe08SMika Westerberg /* 2241349bfe08SMika Westerberg * During suspend the Thunderbolt controller is reset and all PCIe 2242349bfe08SMika Westerberg * tunnels are lost. The NHI driver will try to reestablish all tunnels 2243349bfe08SMika Westerberg * during resume. This adds device links between the tunneled PCIe 2244349bfe08SMika Westerberg * downstream ports and the NHI so that the device core will make sure 2245349bfe08SMika Westerberg * NHI is resumed first before the rest. 2246349bfe08SMika Westerberg */ 2247349bfe08SMika Westerberg static void tb_apple_add_links(struct tb_nhi *nhi) 2248349bfe08SMika Westerberg { 2249349bfe08SMika Westerberg struct pci_dev *upstream, *pdev; 2250349bfe08SMika Westerberg 2251349bfe08SMika Westerberg if (!x86_apple_machine) 2252349bfe08SMika Westerberg return; 2253349bfe08SMika Westerberg 2254349bfe08SMika Westerberg switch (nhi->pdev->device) { 2255349bfe08SMika Westerberg case PCI_DEVICE_ID_INTEL_LIGHT_RIDGE: 2256349bfe08SMika Westerberg case PCI_DEVICE_ID_INTEL_CACTUS_RIDGE_4C: 2257349bfe08SMika Westerberg case PCI_DEVICE_ID_INTEL_FALCON_RIDGE_2C_NHI: 2258349bfe08SMika Westerberg case PCI_DEVICE_ID_INTEL_FALCON_RIDGE_4C_NHI: 2259349bfe08SMika Westerberg break; 2260349bfe08SMika Westerberg default: 2261349bfe08SMika Westerberg return; 2262349bfe08SMika Westerberg } 2263349bfe08SMika Westerberg 2264349bfe08SMika Westerberg upstream = pci_upstream_bridge(nhi->pdev); 2265349bfe08SMika Westerberg while (upstream) { 2266349bfe08SMika Westerberg if (!pci_is_pcie(upstream)) 2267349bfe08SMika Westerberg return; 2268349bfe08SMika Westerberg if (pci_pcie_type(upstream) == PCI_EXP_TYPE_UPSTREAM) 2269349bfe08SMika Westerberg break; 2270349bfe08SMika Westerberg upstream = pci_upstream_bridge(upstream); 2271349bfe08SMika Westerberg } 2272349bfe08SMika Westerberg 2273349bfe08SMika Westerberg if (!upstream) 2274349bfe08SMika Westerberg return; 2275349bfe08SMika Westerberg 2276349bfe08SMika Westerberg /* 2277349bfe08SMika Westerberg * For each hotplug downstream port, create add device link 2278349bfe08SMika Westerberg * back to NHI so that PCIe tunnels can be re-established after 2279349bfe08SMika Westerberg * sleep. 2280349bfe08SMika Westerberg */ 2281349bfe08SMika Westerberg for_each_pci_bridge(pdev, upstream->subordinate) { 2282349bfe08SMika Westerberg const struct device_link *link; 2283349bfe08SMika Westerberg 2284349bfe08SMika Westerberg if (!pci_is_pcie(pdev)) 2285349bfe08SMika Westerberg continue; 2286349bfe08SMika Westerberg if (pci_pcie_type(pdev) != PCI_EXP_TYPE_DOWNSTREAM || 2287349bfe08SMika Westerberg !pdev->is_hotplug_bridge) 2288349bfe08SMika Westerberg continue; 2289349bfe08SMika Westerberg 2290349bfe08SMika Westerberg link = device_link_add(&pdev->dev, &nhi->pdev->dev, 2291349bfe08SMika Westerberg DL_FLAG_AUTOREMOVE_SUPPLIER | 2292349bfe08SMika Westerberg DL_FLAG_PM_RUNTIME); 2293349bfe08SMika Westerberg if (link) { 2294349bfe08SMika Westerberg dev_dbg(&nhi->pdev->dev, "created link from %s\n", 2295349bfe08SMika Westerberg dev_name(&pdev->dev)); 2296349bfe08SMika Westerberg } else { 2297349bfe08SMika Westerberg dev_warn(&nhi->pdev->dev, "device link creation from %s failed\n", 2298349bfe08SMika Westerberg dev_name(&pdev->dev)); 2299349bfe08SMika Westerberg } 2300349bfe08SMika Westerberg } 2301349bfe08SMika Westerberg } 2302349bfe08SMika Westerberg 23039d3cce0bSMika Westerberg struct tb *tb_probe(struct tb_nhi *nhi) 23049d3cce0bSMika Westerberg { 23059d3cce0bSMika Westerberg struct tb_cm *tcm; 23069d3cce0bSMika Westerberg struct tb *tb; 23079d3cce0bSMika Westerberg 23087f0a34d7SMika Westerberg tb = tb_domain_alloc(nhi, TB_TIMEOUT, sizeof(*tcm)); 23099d3cce0bSMika Westerberg if (!tb) 23109d3cce0bSMika Westerberg return NULL; 23119d3cce0bSMika Westerberg 2312c6da62a2SMika Westerberg if (tb_acpi_may_tunnel_pcie()) 231399cabbb0SMika Westerberg tb->security_level = TB_SECURITY_USER; 2314c6da62a2SMika Westerberg else 2315c6da62a2SMika Westerberg tb->security_level = TB_SECURITY_NOPCIE; 2316c6da62a2SMika Westerberg 23179d3cce0bSMika Westerberg tb->cm_ops = &tb_cm_ops; 23189d3cce0bSMika Westerberg 23199d3cce0bSMika Westerberg tcm = tb_priv(tb); 23209d3cce0bSMika Westerberg INIT_LIST_HEAD(&tcm->tunnel_list); 23218afe909bSMika Westerberg INIT_LIST_HEAD(&tcm->dp_resources); 23226ac6faeeSMika Westerberg INIT_DELAYED_WORK(&tcm->remove_work, tb_remove_work); 23236ce35635SMika Westerberg tb_init_bandwidth_groups(tcm); 23249d3cce0bSMika Westerberg 2325e0258805SMika Westerberg tb_dbg(tb, "using software connection manager\n"); 2326e0258805SMika Westerberg 2327349bfe08SMika Westerberg tb_apple_add_links(nhi); 2328349bfe08SMika Westerberg tb_acpi_add_links(nhi); 2329349bfe08SMika Westerberg 23309d3cce0bSMika Westerberg return tb; 233123dd5bb4SAndreas Noever } 2332