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 243*53ba2e16SMika Westerberg /* Enables CL states up to host router */ 2441a9b6cb8SMika Westerberg static int tb_enable_clx(struct tb_switch *sw) 2451a9b6cb8SMika Westerberg { 246*53ba2e16SMika Westerberg struct tb_cm *tcm = tb_priv(sw->tb); 247*53ba2e16SMika Westerberg const struct tb_tunnel *tunnel; 2481a9b6cb8SMika Westerberg int ret; 2491a9b6cb8SMika Westerberg 2501a9b6cb8SMika Westerberg /* 2519650de73SMika Westerberg * Currently only enable CLx for the first link. This is enough 2529650de73SMika Westerberg * to allow the CPU to save energy at least on Intel hardware 2539650de73SMika Westerberg * and makes it slightly simpler to implement. We may change 2549650de73SMika Westerberg * this in the future to cover the whole topology if it turns 2559650de73SMika Westerberg * out to be beneficial. 2569650de73SMika Westerberg */ 257*53ba2e16SMika Westerberg while (sw && sw->config.depth > 1) 258*53ba2e16SMika Westerberg sw = tb_switch_parent(sw); 259*53ba2e16SMika Westerberg 260*53ba2e16SMika Westerberg if (!sw) 261*53ba2e16SMika Westerberg return 0; 262*53ba2e16SMika Westerberg 2639650de73SMika Westerberg if (sw->config.depth != 1) 2649650de73SMika Westerberg return 0; 2659650de73SMika Westerberg 2669650de73SMika Westerberg /* 267*53ba2e16SMika Westerberg * If we are re-enabling then check if there is an active DMA 268*53ba2e16SMika Westerberg * tunnel and in that case bail out. 269*53ba2e16SMika Westerberg */ 270*53ba2e16SMika Westerberg list_for_each_entry(tunnel, &tcm->tunnel_list, list) { 271*53ba2e16SMika Westerberg if (tb_tunnel_is_dma(tunnel)) { 272*53ba2e16SMika Westerberg if (tb_tunnel_port_on_path(tunnel, tb_upstream_port(sw))) 273*53ba2e16SMika Westerberg return 0; 274*53ba2e16SMika Westerberg } 275*53ba2e16SMika Westerberg } 276*53ba2e16SMika Westerberg 277*53ba2e16SMika Westerberg /* 2781a9b6cb8SMika Westerberg * CL0s and CL1 are enabled and supported together. 2791a9b6cb8SMika Westerberg * Silently ignore CLx enabling in case CLx is not supported. 2801a9b6cb8SMika Westerberg */ 28135627353SMika Westerberg ret = tb_switch_clx_enable(sw, TB_CL0S | TB_CL1); 2821a9b6cb8SMika Westerberg return ret == -EOPNOTSUPP ? 0 : ret; 2831a9b6cb8SMika Westerberg } 2841a9b6cb8SMika Westerberg 285*53ba2e16SMika Westerberg /* Disables CL states up to the host router */ 286*53ba2e16SMika Westerberg static void tb_disable_clx(struct tb_switch *sw) 287*53ba2e16SMika Westerberg { 288*53ba2e16SMika Westerberg do { 289*53ba2e16SMika Westerberg if (tb_switch_clx_disable(sw) < 0) 290*53ba2e16SMika Westerberg tb_sw_warn(sw, "failed to disable CL states\n"); 291*53ba2e16SMika Westerberg sw = tb_switch_parent(sw); 292*53ba2e16SMika Westerberg } while (sw); 293*53ba2e16SMika Westerberg } 294*53ba2e16SMika Westerberg 2957d283f41SMika Westerberg static int tb_increase_switch_tmu_accuracy(struct device *dev, void *data) 2967d283f41SMika Westerberg { 2977d283f41SMika Westerberg struct tb_switch *sw; 2987d283f41SMika Westerberg 2997d283f41SMika Westerberg sw = tb_to_switch(dev); 3007d283f41SMika Westerberg if (sw) { 3017d283f41SMika Westerberg tb_switch_tmu_configure(sw, TB_SWITCH_TMU_RATE_HIFI, 30212a14f2fSMika Westerberg tb_switch_clx_is_enabled(sw, TB_CL1)); 3037d283f41SMika Westerberg if (tb_switch_tmu_enable(sw)) 3047d283f41SMika Westerberg tb_sw_warn(sw, "failed to increase TMU rate\n"); 3057d283f41SMika Westerberg } 3067d283f41SMika Westerberg 3077d283f41SMika Westerberg return 0; 3087d283f41SMika Westerberg } 3097d283f41SMika Westerberg 3107d283f41SMika Westerberg static void tb_increase_tmu_accuracy(struct tb_tunnel *tunnel) 3117d283f41SMika Westerberg { 3127d283f41SMika Westerberg struct tb_switch *sw; 3137d283f41SMika Westerberg 3147d283f41SMika Westerberg if (!tunnel) 3157d283f41SMika Westerberg return; 3167d283f41SMika Westerberg 3177d283f41SMika Westerberg /* 3187d283f41SMika Westerberg * Once first DP tunnel is established we change the TMU 3197d283f41SMika Westerberg * accuracy of first depth child routers (and the host router) 3207d283f41SMika Westerberg * to the highest. This is needed for the DP tunneling to work 3217d283f41SMika Westerberg * but also allows CL0s. 3227d283f41SMika Westerberg */ 3237d283f41SMika Westerberg sw = tunnel->tb->root_switch; 3247d283f41SMika Westerberg device_for_each_child(&sw->dev, NULL, tb_increase_switch_tmu_accuracy); 3257d283f41SMika Westerberg } 3267d283f41SMika Westerberg 3274e7b4955SMika Westerberg static int tb_enable_tmu(struct tb_switch *sw) 3284e7b4955SMika Westerberg { 3294e7b4955SMika Westerberg int ret; 3304e7b4955SMika Westerberg 3314e7b4955SMika Westerberg /* 3324e7b4955SMika Westerberg * If CL1 is enabled then we need to configure the TMU accuracy 3334e7b4955SMika Westerberg * level to normal. Otherwise we keep the TMU running at the 3344e7b4955SMika Westerberg * highest accuracy. 3354e7b4955SMika Westerberg */ 33612a14f2fSMika Westerberg if (tb_switch_clx_is_enabled(sw, TB_CL1)) 337ef34add8SMika Westerberg ret = tb_switch_tmu_configure(sw, TB_SWITCH_TMU_RATE_NORMAL, true); 3384e7b4955SMika Westerberg else 339ef34add8SMika Westerberg ret = tb_switch_tmu_configure(sw, TB_SWITCH_TMU_RATE_HIFI, false); 340ef34add8SMika Westerberg if (ret) 341ef34add8SMika Westerberg return ret; 3424e7b4955SMika Westerberg 3434e7b4955SMika Westerberg /* If it is already enabled in correct mode, don't touch it */ 3444e7b4955SMika Westerberg if (tb_switch_tmu_is_enabled(sw)) 3454e7b4955SMika Westerberg return 0; 3464e7b4955SMika Westerberg 3474e7b4955SMika Westerberg ret = tb_switch_tmu_disable(sw); 3484e7b4955SMika Westerberg if (ret) 3494e7b4955SMika Westerberg return ret; 3504e7b4955SMika Westerberg 3514e7b4955SMika Westerberg ret = tb_switch_tmu_post_time(sw); 3524e7b4955SMika Westerberg if (ret) 3534e7b4955SMika Westerberg return ret; 3544e7b4955SMika Westerberg 3554e7b4955SMika Westerberg return tb_switch_tmu_enable(sw); 3564e7b4955SMika Westerberg } 3574e7b4955SMika Westerberg 35843bddb26SMika Westerberg static void tb_switch_discover_tunnels(struct tb_switch *sw, 35943bddb26SMika Westerberg struct list_head *list, 36043bddb26SMika Westerberg bool alloc_hopids) 3610414bec5SMika Westerberg { 3620414bec5SMika Westerberg struct tb *tb = sw->tb; 3630414bec5SMika Westerberg struct tb_port *port; 3640414bec5SMika Westerberg 365b433d010SMika Westerberg tb_switch_for_each_port(sw, port) { 3660414bec5SMika Westerberg struct tb_tunnel *tunnel = NULL; 3670414bec5SMika Westerberg 3680414bec5SMika Westerberg switch (port->config.type) { 3694f807e47SMika Westerberg case TB_TYPE_DP_HDMI_IN: 37043bddb26SMika Westerberg tunnel = tb_tunnel_discover_dp(tb, port, alloc_hopids); 3717d283f41SMika Westerberg tb_increase_tmu_accuracy(tunnel); 3724f807e47SMika Westerberg break; 3734f807e47SMika Westerberg 3740414bec5SMika Westerberg case TB_TYPE_PCIE_DOWN: 37543bddb26SMika Westerberg tunnel = tb_tunnel_discover_pci(tb, port, alloc_hopids); 3760414bec5SMika Westerberg break; 3770414bec5SMika Westerberg 378e6f81858SRajmohan Mani case TB_TYPE_USB3_DOWN: 37943bddb26SMika Westerberg tunnel = tb_tunnel_discover_usb3(tb, port, alloc_hopids); 380e6f81858SRajmohan Mani break; 381e6f81858SRajmohan Mani 3820414bec5SMika Westerberg default: 3830414bec5SMika Westerberg break; 3840414bec5SMika Westerberg } 3850414bec5SMika Westerberg 38643bddb26SMika Westerberg if (tunnel) 38743bddb26SMika Westerberg list_add_tail(&tunnel->list, list); 38843bddb26SMika Westerberg } 3894f807e47SMika Westerberg 39043bddb26SMika Westerberg tb_switch_for_each_port(sw, port) { 39143bddb26SMika Westerberg if (tb_port_has_remote(port)) { 39243bddb26SMika Westerberg tb_switch_discover_tunnels(port->remote->sw, list, 39343bddb26SMika Westerberg alloc_hopids); 39443bddb26SMika Westerberg } 39543bddb26SMika Westerberg } 39643bddb26SMika Westerberg } 39743bddb26SMika Westerberg 39843bddb26SMika Westerberg static void tb_discover_tunnels(struct tb *tb) 39943bddb26SMika Westerberg { 40043bddb26SMika Westerberg struct tb_cm *tcm = tb_priv(tb); 40143bddb26SMika Westerberg struct tb_tunnel *tunnel; 40243bddb26SMika Westerberg 40343bddb26SMika Westerberg tb_switch_discover_tunnels(tb->root_switch, &tcm->tunnel_list, true); 40443bddb26SMika Westerberg 40543bddb26SMika Westerberg list_for_each_entry(tunnel, &tcm->tunnel_list, list) { 4064f807e47SMika Westerberg if (tb_tunnel_is_pci(tunnel)) { 4070414bec5SMika Westerberg struct tb_switch *parent = tunnel->dst_port->sw; 4080414bec5SMika Westerberg 4090414bec5SMika Westerberg while (parent != tunnel->src_port->sw) { 4100414bec5SMika Westerberg parent->boot = true; 4110414bec5SMika Westerberg parent = tb_switch_parent(parent); 4120414bec5SMika Westerberg } 413c94732bdSMika Westerberg } else if (tb_tunnel_is_dp(tunnel)) { 4146ce35635SMika Westerberg struct tb_port *in = tunnel->src_port; 4156ce35635SMika Westerberg struct tb_port *out = tunnel->dst_port; 4166ce35635SMika Westerberg 417c94732bdSMika Westerberg /* Keep the domain from powering down */ 4186ce35635SMika Westerberg pm_runtime_get_sync(&in->sw->dev); 4196ce35635SMika Westerberg pm_runtime_get_sync(&out->sw->dev); 4206ce35635SMika Westerberg 4216ce35635SMika Westerberg tb_discover_bandwidth_group(tcm, in, out); 4224f807e47SMika Westerberg } 4230414bec5SMika Westerberg } 4240414bec5SMika Westerberg } 4259da672a4SAndreas Noever 426f9cad07bSMika Westerberg static int tb_port_configure_xdomain(struct tb_port *port, struct tb_xdomain *xd) 427284652a4SMika Westerberg { 428284652a4SMika Westerberg if (tb_switch_is_usb4(port->sw)) 429f9cad07bSMika Westerberg return usb4_port_configure_xdomain(port, xd); 430284652a4SMika Westerberg return tb_lc_configure_xdomain(port); 431284652a4SMika Westerberg } 432284652a4SMika Westerberg 433284652a4SMika Westerberg static void tb_port_unconfigure_xdomain(struct tb_port *port) 434284652a4SMika Westerberg { 435284652a4SMika Westerberg if (tb_switch_is_usb4(port->sw)) 436284652a4SMika Westerberg usb4_port_unconfigure_xdomain(port); 437284652a4SMika Westerberg else 438284652a4SMika Westerberg tb_lc_unconfigure_xdomain(port); 439341d4518SMika Westerberg 440341d4518SMika Westerberg tb_port_enable(port->dual_link_port); 441284652a4SMika Westerberg } 442284652a4SMika Westerberg 4437ea4cd6bSMika Westerberg static void tb_scan_xdomain(struct tb_port *port) 4447ea4cd6bSMika Westerberg { 4457ea4cd6bSMika Westerberg struct tb_switch *sw = port->sw; 4467ea4cd6bSMika Westerberg struct tb *tb = sw->tb; 4477ea4cd6bSMika Westerberg struct tb_xdomain *xd; 4487ea4cd6bSMika Westerberg u64 route; 4497ea4cd6bSMika Westerberg 4505ca67688SMika Westerberg if (!tb_is_xdomain_enabled()) 4515ca67688SMika Westerberg return; 4525ca67688SMika Westerberg 4537ea4cd6bSMika Westerberg route = tb_downstream_route(port); 4547ea4cd6bSMika Westerberg xd = tb_xdomain_find_by_route(tb, route); 4557ea4cd6bSMika Westerberg if (xd) { 4567ea4cd6bSMika Westerberg tb_xdomain_put(xd); 4577ea4cd6bSMika Westerberg return; 4587ea4cd6bSMika Westerberg } 4597ea4cd6bSMika Westerberg 4607ea4cd6bSMika Westerberg xd = tb_xdomain_alloc(tb, &sw->dev, route, tb->root_switch->uuid, 4617ea4cd6bSMika Westerberg NULL); 4627ea4cd6bSMika Westerberg if (xd) { 4637ea4cd6bSMika Westerberg tb_port_at(route, sw)->xdomain = xd; 464f9cad07bSMika Westerberg tb_port_configure_xdomain(port, xd); 4657ea4cd6bSMika Westerberg tb_xdomain_add(xd); 4667ea4cd6bSMika Westerberg } 4677ea4cd6bSMika Westerberg } 4687ea4cd6bSMika Westerberg 469e6f81858SRajmohan Mani /** 470e6f81858SRajmohan Mani * tb_find_unused_port() - return the first inactive port on @sw 471e6f81858SRajmohan Mani * @sw: Switch to find the port on 472e6f81858SRajmohan Mani * @type: Port type to look for 473e6f81858SRajmohan Mani */ 474e6f81858SRajmohan Mani static struct tb_port *tb_find_unused_port(struct tb_switch *sw, 475e6f81858SRajmohan Mani enum tb_port_type type) 476e6f81858SRajmohan Mani { 477e6f81858SRajmohan Mani struct tb_port *port; 478e6f81858SRajmohan Mani 479e6f81858SRajmohan Mani tb_switch_for_each_port(sw, port) { 480e6f81858SRajmohan Mani if (tb_is_upstream_port(port)) 481e6f81858SRajmohan Mani continue; 482e6f81858SRajmohan Mani if (port->config.type != type) 483e6f81858SRajmohan Mani continue; 484e6f81858SRajmohan Mani if (!port->cap_adap) 485e6f81858SRajmohan Mani continue; 486e6f81858SRajmohan Mani if (tb_port_is_enabled(port)) 487e6f81858SRajmohan Mani continue; 488e6f81858SRajmohan Mani return port; 489e6f81858SRajmohan Mani } 490e6f81858SRajmohan Mani return NULL; 491e6f81858SRajmohan Mani } 492e6f81858SRajmohan Mani 493e6f81858SRajmohan Mani static struct tb_port *tb_find_usb3_down(struct tb_switch *sw, 494e6f81858SRajmohan Mani const struct tb_port *port) 495e6f81858SRajmohan Mani { 496e6f81858SRajmohan Mani struct tb_port *down; 497e6f81858SRajmohan Mani 498e6f81858SRajmohan Mani down = usb4_switch_map_usb3_down(sw, port); 49977cfa40fSMika Westerberg if (down && !tb_usb3_port_is_enabled(down)) 500e6f81858SRajmohan Mani return down; 50177cfa40fSMika Westerberg return NULL; 502e6f81858SRajmohan Mani } 503e6f81858SRajmohan Mani 5040bd680cdSMika Westerberg static struct tb_tunnel *tb_find_tunnel(struct tb *tb, enum tb_tunnel_type type, 5050bd680cdSMika Westerberg struct tb_port *src_port, 5060bd680cdSMika Westerberg struct tb_port *dst_port) 5070bd680cdSMika Westerberg { 5080bd680cdSMika Westerberg struct tb_cm *tcm = tb_priv(tb); 5090bd680cdSMika Westerberg struct tb_tunnel *tunnel; 5100bd680cdSMika Westerberg 5110bd680cdSMika Westerberg list_for_each_entry(tunnel, &tcm->tunnel_list, list) { 5120bd680cdSMika Westerberg if (tunnel->type == type && 5130bd680cdSMika Westerberg ((src_port && src_port == tunnel->src_port) || 5140bd680cdSMika Westerberg (dst_port && dst_port == tunnel->dst_port))) { 5150bd680cdSMika Westerberg return tunnel; 5160bd680cdSMika Westerberg } 5170bd680cdSMika Westerberg } 5180bd680cdSMika Westerberg 5190bd680cdSMika Westerberg return NULL; 5200bd680cdSMika Westerberg } 5210bd680cdSMika Westerberg 5220bd680cdSMika Westerberg static struct tb_tunnel *tb_find_first_usb3_tunnel(struct tb *tb, 5230bd680cdSMika Westerberg struct tb_port *src_port, 5240bd680cdSMika Westerberg struct tb_port *dst_port) 5250bd680cdSMika Westerberg { 5260bd680cdSMika Westerberg struct tb_port *port, *usb3_down; 5270bd680cdSMika Westerberg struct tb_switch *sw; 5280bd680cdSMika Westerberg 5290bd680cdSMika Westerberg /* Pick the router that is deepest in the topology */ 5300bd680cdSMika Westerberg if (dst_port->sw->config.depth > src_port->sw->config.depth) 5310bd680cdSMika Westerberg sw = dst_port->sw; 5320bd680cdSMika Westerberg else 5330bd680cdSMika Westerberg sw = src_port->sw; 5340bd680cdSMika Westerberg 5350bd680cdSMika Westerberg /* Can't be the host router */ 5360bd680cdSMika Westerberg if (sw == tb->root_switch) 5370bd680cdSMika Westerberg return NULL; 5380bd680cdSMika Westerberg 5390bd680cdSMika Westerberg /* Find the downstream USB4 port that leads to this router */ 5400bd680cdSMika Westerberg port = tb_port_at(tb_route(sw), tb->root_switch); 5410bd680cdSMika Westerberg /* Find the corresponding host router USB3 downstream port */ 5420bd680cdSMika Westerberg usb3_down = usb4_switch_map_usb3_down(tb->root_switch, port); 5430bd680cdSMika Westerberg if (!usb3_down) 5440bd680cdSMika Westerberg return NULL; 5450bd680cdSMika Westerberg 5460bd680cdSMika Westerberg return tb_find_tunnel(tb, TB_TUNNEL_USB3, usb3_down, NULL); 5470bd680cdSMika Westerberg } 5480bd680cdSMika Westerberg 5490bd680cdSMika Westerberg static int tb_available_bandwidth(struct tb *tb, struct tb_port *src_port, 5500bd680cdSMika Westerberg struct tb_port *dst_port, int *available_up, int *available_down) 5510bd680cdSMika Westerberg { 5520bd680cdSMika Westerberg int usb3_consumed_up, usb3_consumed_down, ret; 5530bd680cdSMika Westerberg struct tb_cm *tcm = tb_priv(tb); 5540bd680cdSMika Westerberg struct tb_tunnel *tunnel; 5550bd680cdSMika Westerberg struct tb_port *port; 5560bd680cdSMika Westerberg 5572426fdf7SMika Westerberg tb_dbg(tb, "calculating available bandwidth between %llx:%u <-> %llx:%u\n", 5582426fdf7SMika Westerberg tb_route(src_port->sw), src_port->port, tb_route(dst_port->sw), 5592426fdf7SMika Westerberg dst_port->port); 5600bd680cdSMika Westerberg 5610bd680cdSMika Westerberg tunnel = tb_find_first_usb3_tunnel(tb, src_port, dst_port); 5626ce35635SMika Westerberg if (tunnel && tunnel->src_port != src_port && 5636ce35635SMika Westerberg tunnel->dst_port != dst_port) { 5640bd680cdSMika Westerberg ret = tb_tunnel_consumed_bandwidth(tunnel, &usb3_consumed_up, 5650bd680cdSMika Westerberg &usb3_consumed_down); 5660bd680cdSMika Westerberg if (ret) 5670bd680cdSMika Westerberg return ret; 5680bd680cdSMika Westerberg } else { 5690bd680cdSMika Westerberg usb3_consumed_up = 0; 5700bd680cdSMika Westerberg usb3_consumed_down = 0; 5710bd680cdSMika Westerberg } 5720bd680cdSMika Westerberg 5730bd680cdSMika Westerberg *available_up = *available_down = 40000; 5740bd680cdSMika Westerberg 5750bd680cdSMika Westerberg /* Find the minimum available bandwidth over all links */ 5760bd680cdSMika Westerberg tb_for_each_port_on_path(src_port, dst_port, port) { 5770bd680cdSMika Westerberg int link_speed, link_width, up_bw, down_bw; 5780bd680cdSMika Westerberg 5790bd680cdSMika Westerberg if (!tb_port_is_null(port)) 5800bd680cdSMika Westerberg continue; 5810bd680cdSMika Westerberg 5820bd680cdSMika Westerberg if (tb_is_upstream_port(port)) { 5830bd680cdSMika Westerberg link_speed = port->sw->link_speed; 5840bd680cdSMika Westerberg } else { 5850bd680cdSMika Westerberg link_speed = tb_port_get_link_speed(port); 5860bd680cdSMika Westerberg if (link_speed < 0) 5870bd680cdSMika Westerberg return link_speed; 5880bd680cdSMika Westerberg } 5890bd680cdSMika Westerberg 5900bd680cdSMika Westerberg link_width = port->bonded ? 2 : 1; 5910bd680cdSMika Westerberg 5920bd680cdSMika Westerberg up_bw = link_speed * link_width * 1000; /* Mb/s */ 5930bd680cdSMika Westerberg /* Leave 10% guard band */ 5940bd680cdSMika Westerberg up_bw -= up_bw / 10; 5950bd680cdSMika Westerberg down_bw = up_bw; 5960bd680cdSMika Westerberg 5972426fdf7SMika Westerberg tb_port_dbg(port, "link total bandwidth %d/%d Mb/s\n", up_bw, 5982426fdf7SMika Westerberg down_bw); 5990bd680cdSMika Westerberg 6000bd680cdSMika Westerberg /* 6010bd680cdSMika Westerberg * Find all DP tunnels that cross the port and reduce 6020bd680cdSMika Westerberg * their consumed bandwidth from the available. 6030bd680cdSMika Westerberg */ 6040bd680cdSMika Westerberg list_for_each_entry(tunnel, &tcm->tunnel_list, list) { 6050bd680cdSMika Westerberg int dp_consumed_up, dp_consumed_down; 6060bd680cdSMika Westerberg 6076ce35635SMika Westerberg if (tb_tunnel_is_invalid(tunnel)) 6086ce35635SMika Westerberg continue; 6096ce35635SMika Westerberg 6100bd680cdSMika Westerberg if (!tb_tunnel_is_dp(tunnel)) 6110bd680cdSMika Westerberg continue; 6120bd680cdSMika Westerberg 6130bd680cdSMika Westerberg if (!tb_tunnel_port_on_path(tunnel, port)) 6140bd680cdSMika Westerberg continue; 6150bd680cdSMika Westerberg 6166ce35635SMika Westerberg /* 6176ce35635SMika Westerberg * Ignore the DP tunnel between src_port and 6186ce35635SMika Westerberg * dst_port because it is the same tunnel and we 6196ce35635SMika Westerberg * may be re-calculating estimated bandwidth. 6206ce35635SMika Westerberg */ 6216ce35635SMika Westerberg if (tunnel->src_port == src_port && 6226ce35635SMika Westerberg tunnel->dst_port == dst_port) 6236ce35635SMika Westerberg continue; 6246ce35635SMika Westerberg 6250bd680cdSMika Westerberg ret = tb_tunnel_consumed_bandwidth(tunnel, 6260bd680cdSMika Westerberg &dp_consumed_up, 6270bd680cdSMika Westerberg &dp_consumed_down); 6280bd680cdSMika Westerberg if (ret) 6290bd680cdSMika Westerberg return ret; 6300bd680cdSMika Westerberg 6310bd680cdSMika Westerberg up_bw -= dp_consumed_up; 6320bd680cdSMika Westerberg down_bw -= dp_consumed_down; 6330bd680cdSMika Westerberg } 6340bd680cdSMika Westerberg 6350bd680cdSMika Westerberg /* 6360bd680cdSMika Westerberg * If USB3 is tunneled from the host router down to the 6370bd680cdSMika Westerberg * branch leading to port we need to take USB3 consumed 6380bd680cdSMika Westerberg * bandwidth into account regardless whether it actually 6390bd680cdSMika Westerberg * crosses the port. 6400bd680cdSMika Westerberg */ 6410bd680cdSMika Westerberg up_bw -= usb3_consumed_up; 6420bd680cdSMika Westerberg down_bw -= usb3_consumed_down; 6430bd680cdSMika Westerberg 6440bd680cdSMika Westerberg if (up_bw < *available_up) 6450bd680cdSMika Westerberg *available_up = up_bw; 6460bd680cdSMika Westerberg if (down_bw < *available_down) 6470bd680cdSMika Westerberg *available_down = down_bw; 6480bd680cdSMika Westerberg } 6490bd680cdSMika Westerberg 6500bd680cdSMika Westerberg if (*available_up < 0) 6510bd680cdSMika Westerberg *available_up = 0; 6520bd680cdSMika Westerberg if (*available_down < 0) 6530bd680cdSMika Westerberg *available_down = 0; 6540bd680cdSMika Westerberg 6550bd680cdSMika Westerberg return 0; 6560bd680cdSMika Westerberg } 6570bd680cdSMika Westerberg 6580bd680cdSMika Westerberg static int tb_release_unused_usb3_bandwidth(struct tb *tb, 6590bd680cdSMika Westerberg struct tb_port *src_port, 6600bd680cdSMika Westerberg struct tb_port *dst_port) 6610bd680cdSMika Westerberg { 6620bd680cdSMika Westerberg struct tb_tunnel *tunnel; 6630bd680cdSMika Westerberg 6640bd680cdSMika Westerberg tunnel = tb_find_first_usb3_tunnel(tb, src_port, dst_port); 6650bd680cdSMika Westerberg return tunnel ? tb_tunnel_release_unused_bandwidth(tunnel) : 0; 6660bd680cdSMika Westerberg } 6670bd680cdSMika Westerberg 6680bd680cdSMika Westerberg static void tb_reclaim_usb3_bandwidth(struct tb *tb, struct tb_port *src_port, 6690bd680cdSMika Westerberg struct tb_port *dst_port) 6700bd680cdSMika Westerberg { 6710bd680cdSMika Westerberg int ret, available_up, available_down; 6720bd680cdSMika Westerberg struct tb_tunnel *tunnel; 6730bd680cdSMika Westerberg 6740bd680cdSMika Westerberg tunnel = tb_find_first_usb3_tunnel(tb, src_port, dst_port); 6750bd680cdSMika Westerberg if (!tunnel) 6760bd680cdSMika Westerberg return; 6770bd680cdSMika Westerberg 6780bd680cdSMika Westerberg tb_dbg(tb, "reclaiming unused bandwidth for USB3\n"); 6790bd680cdSMika Westerberg 6800bd680cdSMika Westerberg /* 6810bd680cdSMika Westerberg * Calculate available bandwidth for the first hop USB3 tunnel. 6820bd680cdSMika Westerberg * That determines the whole USB3 bandwidth for this branch. 6830bd680cdSMika Westerberg */ 6840bd680cdSMika Westerberg ret = tb_available_bandwidth(tb, tunnel->src_port, tunnel->dst_port, 6850bd680cdSMika Westerberg &available_up, &available_down); 6860bd680cdSMika Westerberg if (ret) { 6870bd680cdSMika Westerberg tb_warn(tb, "failed to calculate available bandwidth\n"); 6880bd680cdSMika Westerberg return; 6890bd680cdSMika Westerberg } 6900bd680cdSMika Westerberg 6910bd680cdSMika Westerberg tb_dbg(tb, "available bandwidth for USB3 %d/%d Mb/s\n", 6920bd680cdSMika Westerberg available_up, available_down); 6930bd680cdSMika Westerberg 6940bd680cdSMika Westerberg tb_tunnel_reclaim_available_bandwidth(tunnel, &available_up, &available_down); 6950bd680cdSMika Westerberg } 6960bd680cdSMika Westerberg 697e6f81858SRajmohan Mani static int tb_tunnel_usb3(struct tb *tb, struct tb_switch *sw) 698e6f81858SRajmohan Mani { 699e6f81858SRajmohan Mani struct tb_switch *parent = tb_switch_parent(sw); 7000bd680cdSMika Westerberg int ret, available_up, available_down; 701e6f81858SRajmohan Mani struct tb_port *up, *down, *port; 702e6f81858SRajmohan Mani struct tb_cm *tcm = tb_priv(tb); 703e6f81858SRajmohan Mani struct tb_tunnel *tunnel; 704e6f81858SRajmohan Mani 705c6da62a2SMika Westerberg if (!tb_acpi_may_tunnel_usb3()) { 706c6da62a2SMika Westerberg tb_dbg(tb, "USB3 tunneling disabled, not creating tunnel\n"); 707c6da62a2SMika Westerberg return 0; 708c6da62a2SMika Westerberg } 709c6da62a2SMika Westerberg 710e6f81858SRajmohan Mani up = tb_switch_find_port(sw, TB_TYPE_USB3_UP); 711e6f81858SRajmohan Mani if (!up) 712e6f81858SRajmohan Mani return 0; 713e6f81858SRajmohan Mani 714bbcf40b3SMika Westerberg if (!sw->link_usb4) 715bbcf40b3SMika Westerberg return 0; 716bbcf40b3SMika Westerberg 717e6f81858SRajmohan Mani /* 718e6f81858SRajmohan Mani * Look up available down port. Since we are chaining it should 719e6f81858SRajmohan Mani * be found right above this switch. 720e6f81858SRajmohan Mani */ 7217ce54221SGil Fine port = tb_switch_downstream_port(sw); 722e6f81858SRajmohan Mani down = tb_find_usb3_down(parent, port); 723e6f81858SRajmohan Mani if (!down) 724e6f81858SRajmohan Mani return 0; 725e6f81858SRajmohan Mani 726e6f81858SRajmohan Mani if (tb_route(parent)) { 727e6f81858SRajmohan Mani struct tb_port *parent_up; 728e6f81858SRajmohan Mani /* 729e6f81858SRajmohan Mani * Check first that the parent switch has its upstream USB3 730e6f81858SRajmohan Mani * port enabled. Otherwise the chain is not complete and 731e6f81858SRajmohan Mani * there is no point setting up a new tunnel. 732e6f81858SRajmohan Mani */ 733e6f81858SRajmohan Mani parent_up = tb_switch_find_port(parent, TB_TYPE_USB3_UP); 734e6f81858SRajmohan Mani if (!parent_up || !tb_port_is_enabled(parent_up)) 735e6f81858SRajmohan Mani return 0; 7360bd680cdSMika Westerberg 7370bd680cdSMika Westerberg /* Make all unused bandwidth available for the new tunnel */ 7380bd680cdSMika Westerberg ret = tb_release_unused_usb3_bandwidth(tb, down, up); 7390bd680cdSMika Westerberg if (ret) 7400bd680cdSMika Westerberg return ret; 741e6f81858SRajmohan Mani } 742e6f81858SRajmohan Mani 7430bd680cdSMika Westerberg ret = tb_available_bandwidth(tb, down, up, &available_up, 7440bd680cdSMika Westerberg &available_down); 7450bd680cdSMika Westerberg if (ret) 7460bd680cdSMika Westerberg goto err_reclaim; 7470bd680cdSMika Westerberg 7480bd680cdSMika Westerberg tb_port_dbg(up, "available bandwidth for new USB3 tunnel %d/%d Mb/s\n", 7490bd680cdSMika Westerberg available_up, available_down); 7500bd680cdSMika Westerberg 7510bd680cdSMika Westerberg tunnel = tb_tunnel_alloc_usb3(tb, up, down, available_up, 7520bd680cdSMika Westerberg available_down); 7530bd680cdSMika Westerberg if (!tunnel) { 7540bd680cdSMika Westerberg ret = -ENOMEM; 7550bd680cdSMika Westerberg goto err_reclaim; 7560bd680cdSMika Westerberg } 757e6f81858SRajmohan Mani 758e6f81858SRajmohan Mani if (tb_tunnel_activate(tunnel)) { 759e6f81858SRajmohan Mani tb_port_info(up, 760e6f81858SRajmohan Mani "USB3 tunnel activation failed, aborting\n"); 7610bd680cdSMika Westerberg ret = -EIO; 7620bd680cdSMika Westerberg goto err_free; 763e6f81858SRajmohan Mani } 764e6f81858SRajmohan Mani 765e6f81858SRajmohan Mani list_add_tail(&tunnel->list, &tcm->tunnel_list); 7660bd680cdSMika Westerberg if (tb_route(parent)) 7670bd680cdSMika Westerberg tb_reclaim_usb3_bandwidth(tb, down, up); 7680bd680cdSMika Westerberg 769e6f81858SRajmohan Mani return 0; 7700bd680cdSMika Westerberg 7710bd680cdSMika Westerberg err_free: 7720bd680cdSMika Westerberg tb_tunnel_free(tunnel); 7730bd680cdSMika Westerberg err_reclaim: 7740bd680cdSMika Westerberg if (tb_route(parent)) 7750bd680cdSMika Westerberg tb_reclaim_usb3_bandwidth(tb, down, up); 7760bd680cdSMika Westerberg 7770bd680cdSMika Westerberg return ret; 778e6f81858SRajmohan Mani } 779e6f81858SRajmohan Mani 780e6f81858SRajmohan Mani static int tb_create_usb3_tunnels(struct tb_switch *sw) 781e6f81858SRajmohan Mani { 782e6f81858SRajmohan Mani struct tb_port *port; 783e6f81858SRajmohan Mani int ret; 784e6f81858SRajmohan Mani 785c6da62a2SMika Westerberg if (!tb_acpi_may_tunnel_usb3()) 786c6da62a2SMika Westerberg return 0; 787c6da62a2SMika Westerberg 788e6f81858SRajmohan Mani if (tb_route(sw)) { 789e6f81858SRajmohan Mani ret = tb_tunnel_usb3(sw->tb, sw); 790e6f81858SRajmohan Mani if (ret) 791e6f81858SRajmohan Mani return ret; 792e6f81858SRajmohan Mani } 793e6f81858SRajmohan Mani 794e6f81858SRajmohan Mani tb_switch_for_each_port(sw, port) { 795e6f81858SRajmohan Mani if (!tb_port_has_remote(port)) 796e6f81858SRajmohan Mani continue; 797e6f81858SRajmohan Mani ret = tb_create_usb3_tunnels(port->remote->sw); 798e6f81858SRajmohan Mani if (ret) 799e6f81858SRajmohan Mani return ret; 800e6f81858SRajmohan Mani } 801e6f81858SRajmohan Mani 802e6f81858SRajmohan Mani return 0; 803e6f81858SRajmohan Mani } 804e6f81858SRajmohan Mani 8059da672a4SAndreas Noever static void tb_scan_port(struct tb_port *port); 8069da672a4SAndreas Noever 807877e50b3SLee Jones /* 8089da672a4SAndreas Noever * tb_scan_switch() - scan for and initialize downstream switches 8099da672a4SAndreas Noever */ 8109da672a4SAndreas Noever static void tb_scan_switch(struct tb_switch *sw) 8119da672a4SAndreas Noever { 812b433d010SMika Westerberg struct tb_port *port; 813b433d010SMika Westerberg 8146ac6faeeSMika Westerberg pm_runtime_get_sync(&sw->dev); 8156ac6faeeSMika Westerberg 816b433d010SMika Westerberg tb_switch_for_each_port(sw, port) 817b433d010SMika Westerberg tb_scan_port(port); 8186ac6faeeSMika Westerberg 8196ac6faeeSMika Westerberg pm_runtime_mark_last_busy(&sw->dev); 8206ac6faeeSMika Westerberg pm_runtime_put_autosuspend(&sw->dev); 8219da672a4SAndreas Noever } 8229da672a4SAndreas Noever 823877e50b3SLee Jones /* 8249da672a4SAndreas Noever * tb_scan_port() - check for and initialize switches below port 8259da672a4SAndreas Noever */ 8269da672a4SAndreas Noever static void tb_scan_port(struct tb_port *port) 8279da672a4SAndreas Noever { 82899cabbb0SMika Westerberg struct tb_cm *tcm = tb_priv(port->sw->tb); 829dfe40ca4SMika Westerberg struct tb_port *upstream_port; 8303fe95742SMika Westerberg bool discovery = false; 8319da672a4SAndreas Noever struct tb_switch *sw; 832dfe40ca4SMika Westerberg 8339da672a4SAndreas Noever if (tb_is_upstream_port(port)) 8349da672a4SAndreas Noever return; 8354f807e47SMika Westerberg 8364f807e47SMika Westerberg if (tb_port_is_dpout(port) && tb_dp_port_hpd_is_active(port) == 1 && 8374f807e47SMika Westerberg !tb_dp_port_is_enabled(port)) { 8384f807e47SMika Westerberg tb_port_dbg(port, "DP adapter HPD set, queuing hotplug\n"); 8394f807e47SMika Westerberg tb_queue_hotplug(port->sw->tb, tb_route(port->sw), port->port, 8404f807e47SMika Westerberg false); 8414f807e47SMika Westerberg return; 8424f807e47SMika Westerberg } 8434f807e47SMika Westerberg 8449da672a4SAndreas Noever if (port->config.type != TB_TYPE_PORT) 8459da672a4SAndreas Noever return; 846343fcb8cSAndreas Noever if (port->dual_link_port && port->link_nr) 847343fcb8cSAndreas Noever return; /* 848343fcb8cSAndreas Noever * Downstream switch is reachable through two ports. 849343fcb8cSAndreas Noever * Only scan on the primary port (link_nr == 0). 850343fcb8cSAndreas Noever */ 85123257cfcSMika Westerberg 85223257cfcSMika Westerberg if (port->usb4) 85323257cfcSMika Westerberg pm_runtime_get_sync(&port->usb4->dev); 85423257cfcSMika Westerberg 8559da672a4SAndreas Noever if (tb_wait_for_port(port, false) <= 0) 85623257cfcSMika Westerberg goto out_rpm_put; 8579da672a4SAndreas Noever if (port->remote) { 8587ea4cd6bSMika Westerberg tb_port_dbg(port, "port already has a remote\n"); 85923257cfcSMika Westerberg goto out_rpm_put; 8609da672a4SAndreas Noever } 861dacb1287SKranthi Kuntala 8623fb10ea4SRajmohan Mani tb_retimer_scan(port, true); 863dacb1287SKranthi Kuntala 864bfe778acSMika Westerberg sw = tb_switch_alloc(port->sw->tb, &port->sw->dev, 865bfe778acSMika Westerberg tb_downstream_route(port)); 8667ea4cd6bSMika Westerberg if (IS_ERR(sw)) { 8677ea4cd6bSMika Westerberg /* 8687ea4cd6bSMika Westerberg * If there is an error accessing the connected switch 8697ea4cd6bSMika Westerberg * it may be connected to another domain. Also we allow 8707ea4cd6bSMika Westerberg * the other domain to be connected to a max depth switch. 8717ea4cd6bSMika Westerberg */ 8727ea4cd6bSMika Westerberg if (PTR_ERR(sw) == -EIO || PTR_ERR(sw) == -EADDRNOTAVAIL) 8737ea4cd6bSMika Westerberg tb_scan_xdomain(port); 87423257cfcSMika Westerberg goto out_rpm_put; 8757ea4cd6bSMika Westerberg } 876bfe778acSMika Westerberg 877bfe778acSMika Westerberg if (tb_switch_configure(sw)) { 878bfe778acSMika Westerberg tb_switch_put(sw); 87923257cfcSMika Westerberg goto out_rpm_put; 880bfe778acSMika Westerberg } 881bfe778acSMika Westerberg 88299cabbb0SMika Westerberg /* 8837ea4cd6bSMika Westerberg * If there was previously another domain connected remove it 8847ea4cd6bSMika Westerberg * first. 8857ea4cd6bSMika Westerberg */ 8867ea4cd6bSMika Westerberg if (port->xdomain) { 8877ea4cd6bSMika Westerberg tb_xdomain_remove(port->xdomain); 888284652a4SMika Westerberg tb_port_unconfigure_xdomain(port); 8897ea4cd6bSMika Westerberg port->xdomain = NULL; 8907ea4cd6bSMika Westerberg } 8917ea4cd6bSMika Westerberg 8927ea4cd6bSMika Westerberg /* 89399cabbb0SMika Westerberg * Do not send uevents until we have discovered all existing 89499cabbb0SMika Westerberg * tunnels and know which switches were authorized already by 89599cabbb0SMika Westerberg * the boot firmware. 89699cabbb0SMika Westerberg */ 8973fe95742SMika Westerberg if (!tcm->hotplug_active) { 89899cabbb0SMika Westerberg dev_set_uevent_suppress(&sw->dev, true); 8993fe95742SMika Westerberg discovery = true; 9003fe95742SMika Westerberg } 901f67cf491SMika Westerberg 9026ac6faeeSMika Westerberg /* 9036ac6faeeSMika Westerberg * At the moment Thunderbolt 2 and beyond (devices with LC) we 9046ac6faeeSMika Westerberg * can support runtime PM. 9056ac6faeeSMika Westerberg */ 9066ac6faeeSMika Westerberg sw->rpm = sw->generation > 1; 9076ac6faeeSMika Westerberg 908bfe778acSMika Westerberg if (tb_switch_add(sw)) { 909bfe778acSMika Westerberg tb_switch_put(sw); 91023257cfcSMika Westerberg goto out_rpm_put; 911bfe778acSMika Westerberg } 912bfe778acSMika Westerberg 913dfe40ca4SMika Westerberg /* Link the switches using both links if available */ 914dfe40ca4SMika Westerberg upstream_port = tb_upstream_port(sw); 915dfe40ca4SMika Westerberg port->remote = upstream_port; 916dfe40ca4SMika Westerberg upstream_port->remote = port; 917dfe40ca4SMika Westerberg if (port->dual_link_port && upstream_port->dual_link_port) { 918dfe40ca4SMika Westerberg port->dual_link_port->remote = upstream_port->dual_link_port; 919dfe40ca4SMika Westerberg upstream_port->dual_link_port->remote = port->dual_link_port; 920dfe40ca4SMika Westerberg } 921dfe40ca4SMika Westerberg 92291c0c120SMika Westerberg /* Enable lane bonding if supported */ 9232ca3263aSMika Westerberg tb_switch_lane_bonding_enable(sw); 924de462039SMika Westerberg /* Set the link configured */ 925de462039SMika Westerberg tb_switch_configure_link(sw); 926b017a46dSGil Fine /* 927b017a46dSGil Fine * CL0s and CL1 are enabled and supported together. 928b017a46dSGil Fine * Silently ignore CLx enabling in case CLx is not supported. 929b017a46dSGil Fine */ 9301a9b6cb8SMika Westerberg if (discovery) 9313fe95742SMika Westerberg tb_sw_dbg(sw, "discovery, not touching CL states\n"); 9321a9b6cb8SMika Westerberg else if (tb_enable_clx(sw)) 9331a9b6cb8SMika Westerberg tb_sw_warn(sw, "failed to enable CL states\n"); 9348a90e4faSGil Fine 935cf29b9afSRajmohan Mani if (tb_enable_tmu(sw)) 936cf29b9afSRajmohan Mani tb_sw_warn(sw, "failed to enable TMU\n"); 937cf29b9afSRajmohan Mani 938dacb1287SKranthi Kuntala /* Scan upstream retimers */ 9393fb10ea4SRajmohan Mani tb_retimer_scan(upstream_port, true); 940dacb1287SKranthi Kuntala 941e6f81858SRajmohan Mani /* 942e6f81858SRajmohan Mani * Create USB 3.x tunnels only when the switch is plugged to the 943e6f81858SRajmohan Mani * domain. This is because we scan the domain also during discovery 944e6f81858SRajmohan Mani * and want to discover existing USB 3.x tunnels before we create 945e6f81858SRajmohan Mani * any new. 946e6f81858SRajmohan Mani */ 947e6f81858SRajmohan Mani if (tcm->hotplug_active && tb_tunnel_usb3(sw->tb, sw)) 948e6f81858SRajmohan Mani tb_sw_warn(sw, "USB3 tunnel creation failed\n"); 949e6f81858SRajmohan Mani 950e876f34aSMika Westerberg tb_add_dp_resources(sw); 9519da672a4SAndreas Noever tb_scan_switch(sw); 95223257cfcSMika Westerberg 95323257cfcSMika Westerberg out_rpm_put: 95423257cfcSMika Westerberg if (port->usb4) { 95523257cfcSMika Westerberg pm_runtime_mark_last_busy(&port->usb4->dev); 95623257cfcSMika Westerberg pm_runtime_put_autosuspend(&port->usb4->dev); 95723257cfcSMika Westerberg } 9589da672a4SAndreas Noever } 9599da672a4SAndreas Noever 9608afe909bSMika Westerberg static void tb_deactivate_and_free_tunnel(struct tb_tunnel *tunnel) 9618afe909bSMika Westerberg { 9620bd680cdSMika Westerberg struct tb_port *src_port, *dst_port; 9630bd680cdSMika Westerberg struct tb *tb; 9640bd680cdSMika Westerberg 9658afe909bSMika Westerberg if (!tunnel) 9668afe909bSMika Westerberg return; 9678afe909bSMika Westerberg 9688afe909bSMika Westerberg tb_tunnel_deactivate(tunnel); 9698afe909bSMika Westerberg list_del(&tunnel->list); 9708afe909bSMika Westerberg 9710bd680cdSMika Westerberg tb = tunnel->tb; 9720bd680cdSMika Westerberg src_port = tunnel->src_port; 9730bd680cdSMika Westerberg dst_port = tunnel->dst_port; 9748afe909bSMika Westerberg 9750bd680cdSMika Westerberg switch (tunnel->type) { 9760bd680cdSMika Westerberg case TB_TUNNEL_DP: 9776ce35635SMika Westerberg tb_detach_bandwidth_group(src_port); 9780bd680cdSMika Westerberg /* 9790bd680cdSMika Westerberg * In case of DP tunnel make sure the DP IN resource is 9800bd680cdSMika Westerberg * deallocated properly. 9810bd680cdSMika Westerberg */ 9820bd680cdSMika Westerberg tb_switch_dealloc_dp_resource(src_port->sw, src_port); 9836ac6faeeSMika Westerberg /* Now we can allow the domain to runtime suspend again */ 9846ac6faeeSMika Westerberg pm_runtime_mark_last_busy(&dst_port->sw->dev); 9856ac6faeeSMika Westerberg pm_runtime_put_autosuspend(&dst_port->sw->dev); 9866ac6faeeSMika Westerberg pm_runtime_mark_last_busy(&src_port->sw->dev); 9876ac6faeeSMika Westerberg pm_runtime_put_autosuspend(&src_port->sw->dev); 9880bd680cdSMika Westerberg fallthrough; 9890bd680cdSMika Westerberg 9900bd680cdSMika Westerberg case TB_TUNNEL_USB3: 9910bd680cdSMika Westerberg tb_reclaim_usb3_bandwidth(tb, src_port, dst_port); 9920bd680cdSMika Westerberg break; 9930bd680cdSMika Westerberg 9940bd680cdSMika Westerberg default: 9950bd680cdSMika Westerberg /* 9960bd680cdSMika Westerberg * PCIe and DMA tunnels do not consume guaranteed 9970bd680cdSMika Westerberg * bandwidth. 9980bd680cdSMika Westerberg */ 9990bd680cdSMika Westerberg break; 10008afe909bSMika Westerberg } 10018afe909bSMika Westerberg 10028afe909bSMika Westerberg tb_tunnel_free(tunnel); 10034f807e47SMika Westerberg } 10044f807e47SMika Westerberg 1005877e50b3SLee Jones /* 10063364f0c1SAndreas Noever * tb_free_invalid_tunnels() - destroy tunnels of devices that have gone away 10073364f0c1SAndreas Noever */ 10083364f0c1SAndreas Noever static void tb_free_invalid_tunnels(struct tb *tb) 10093364f0c1SAndreas Noever { 10109d3cce0bSMika Westerberg struct tb_cm *tcm = tb_priv(tb); 101193f36adeSMika Westerberg struct tb_tunnel *tunnel; 101293f36adeSMika Westerberg struct tb_tunnel *n; 10139d3cce0bSMika Westerberg 10149d3cce0bSMika Westerberg list_for_each_entry_safe(tunnel, n, &tcm->tunnel_list, list) { 10158afe909bSMika Westerberg if (tb_tunnel_is_invalid(tunnel)) 10168afe909bSMika Westerberg tb_deactivate_and_free_tunnel(tunnel); 10173364f0c1SAndreas Noever } 10183364f0c1SAndreas Noever } 10193364f0c1SAndreas Noever 1020877e50b3SLee Jones /* 102123dd5bb4SAndreas Noever * tb_free_unplugged_children() - traverse hierarchy and free unplugged switches 102223dd5bb4SAndreas Noever */ 102323dd5bb4SAndreas Noever static void tb_free_unplugged_children(struct tb_switch *sw) 102423dd5bb4SAndreas Noever { 1025b433d010SMika Westerberg struct tb_port *port; 1026dfe40ca4SMika Westerberg 1027b433d010SMika Westerberg tb_switch_for_each_port(sw, port) { 1028dfe40ca4SMika Westerberg if (!tb_port_has_remote(port)) 102923dd5bb4SAndreas Noever continue; 1030dfe40ca4SMika Westerberg 103123dd5bb4SAndreas Noever if (port->remote->sw->is_unplugged) { 1032dacb1287SKranthi Kuntala tb_retimer_remove_all(port); 10338afe909bSMika Westerberg tb_remove_dp_resources(port->remote->sw); 1034de462039SMika Westerberg tb_switch_unconfigure_link(port->remote->sw); 103591c0c120SMika Westerberg tb_switch_lane_bonding_disable(port->remote->sw); 1036bfe778acSMika Westerberg tb_switch_remove(port->remote->sw); 103723dd5bb4SAndreas Noever port->remote = NULL; 1038dfe40ca4SMika Westerberg if (port->dual_link_port) 1039dfe40ca4SMika Westerberg port->dual_link_port->remote = NULL; 104023dd5bb4SAndreas Noever } else { 104123dd5bb4SAndreas Noever tb_free_unplugged_children(port->remote->sw); 104223dd5bb4SAndreas Noever } 104323dd5bb4SAndreas Noever } 104423dd5bb4SAndreas Noever } 104523dd5bb4SAndreas Noever 104699cabbb0SMika Westerberg static struct tb_port *tb_find_pcie_down(struct tb_switch *sw, 104799cabbb0SMika Westerberg const struct tb_port *port) 10483364f0c1SAndreas Noever { 1049b0407983SMika Westerberg struct tb_port *down = NULL; 1050b0407983SMika Westerberg 105199cabbb0SMika Westerberg /* 105299cabbb0SMika Westerberg * To keep plugging devices consistently in the same PCIe 1053b0407983SMika Westerberg * hierarchy, do mapping here for switch downstream PCIe ports. 105499cabbb0SMika Westerberg */ 1055b0407983SMika Westerberg if (tb_switch_is_usb4(sw)) { 1056b0407983SMika Westerberg down = usb4_switch_map_pcie_down(sw, port); 1057b0407983SMika Westerberg } else if (!tb_route(sw)) { 105899cabbb0SMika Westerberg int phy_port = tb_phy_port_from_link(port->port); 105999cabbb0SMika Westerberg int index; 106099cabbb0SMika Westerberg 106199cabbb0SMika Westerberg /* 106299cabbb0SMika Westerberg * Hard-coded Thunderbolt port to PCIe down port mapping 106399cabbb0SMika Westerberg * per controller. 106499cabbb0SMika Westerberg */ 10657bffd97eSMika Westerberg if (tb_switch_is_cactus_ridge(sw) || 10667bffd97eSMika Westerberg tb_switch_is_alpine_ridge(sw)) 106799cabbb0SMika Westerberg index = !phy_port ? 6 : 7; 106817a8f815SMika Westerberg else if (tb_switch_is_falcon_ridge(sw)) 106999cabbb0SMika Westerberg index = !phy_port ? 6 : 8; 10707bffd97eSMika Westerberg else if (tb_switch_is_titan_ridge(sw)) 10717bffd97eSMika Westerberg index = !phy_port ? 8 : 9; 107299cabbb0SMika Westerberg else 107399cabbb0SMika Westerberg goto out; 107499cabbb0SMika Westerberg 107599cabbb0SMika Westerberg /* Validate the hard-coding */ 107699cabbb0SMika Westerberg if (WARN_ON(index > sw->config.max_port_number)) 107799cabbb0SMika Westerberg goto out; 1078b0407983SMika Westerberg 1079b0407983SMika Westerberg down = &sw->ports[index]; 1080b0407983SMika Westerberg } 1081b0407983SMika Westerberg 1082b0407983SMika Westerberg if (down) { 1083b0407983SMika Westerberg if (WARN_ON(!tb_port_is_pcie_down(down))) 108499cabbb0SMika Westerberg goto out; 10859cac51a0SMika Westerberg if (tb_pci_port_is_enabled(down)) 108699cabbb0SMika Westerberg goto out; 108799cabbb0SMika Westerberg 1088b0407983SMika Westerberg return down; 108999cabbb0SMika Westerberg } 109099cabbb0SMika Westerberg 109199cabbb0SMika Westerberg out: 1092e78db6f0SMika Westerberg return tb_find_unused_port(sw, TB_TYPE_PCIE_DOWN); 109399cabbb0SMika Westerberg } 109499cabbb0SMika Westerberg 10956ce35635SMika Westerberg static void 10966ce35635SMika Westerberg tb_recalc_estimated_bandwidth_for_group(struct tb_bandwidth_group *group) 10976ce35635SMika Westerberg { 10986ce35635SMika Westerberg struct tb_tunnel *first_tunnel; 10996ce35635SMika Westerberg struct tb *tb = group->tb; 11006ce35635SMika Westerberg struct tb_port *in; 11016ce35635SMika Westerberg int ret; 11026ce35635SMika Westerberg 11036ce35635SMika Westerberg tb_dbg(tb, "re-calculating bandwidth estimation for group %u\n", 11046ce35635SMika Westerberg group->index); 11056ce35635SMika Westerberg 11066ce35635SMika Westerberg first_tunnel = NULL; 11076ce35635SMika Westerberg list_for_each_entry(in, &group->ports, group_list) { 11086ce35635SMika Westerberg int estimated_bw, estimated_up, estimated_down; 11096ce35635SMika Westerberg struct tb_tunnel *tunnel; 11106ce35635SMika Westerberg struct tb_port *out; 11116ce35635SMika Westerberg 11126ce35635SMika Westerberg if (!usb4_dp_port_bw_mode_enabled(in)) 11136ce35635SMika Westerberg continue; 11146ce35635SMika Westerberg 11156ce35635SMika Westerberg tunnel = tb_find_tunnel(tb, TB_TUNNEL_DP, in, NULL); 11166ce35635SMika Westerberg if (WARN_ON(!tunnel)) 11176ce35635SMika Westerberg break; 11186ce35635SMika Westerberg 11196ce35635SMika Westerberg if (!first_tunnel) { 11206ce35635SMika Westerberg /* 11216ce35635SMika Westerberg * Since USB3 bandwidth is shared by all DP 11226ce35635SMika Westerberg * tunnels under the host router USB4 port, even 11236ce35635SMika Westerberg * if they do not begin from the host router, we 11246ce35635SMika Westerberg * can release USB3 bandwidth just once and not 11256ce35635SMika Westerberg * for each tunnel separately. 11266ce35635SMika Westerberg */ 11276ce35635SMika Westerberg first_tunnel = tunnel; 11286ce35635SMika Westerberg ret = tb_release_unused_usb3_bandwidth(tb, 11296ce35635SMika Westerberg first_tunnel->src_port, first_tunnel->dst_port); 11306ce35635SMika Westerberg if (ret) { 11316ce35635SMika Westerberg tb_port_warn(in, 11326ce35635SMika Westerberg "failed to release unused bandwidth\n"); 11336ce35635SMika Westerberg break; 11346ce35635SMika Westerberg } 11356ce35635SMika Westerberg } 11366ce35635SMika Westerberg 11376ce35635SMika Westerberg out = tunnel->dst_port; 11386ce35635SMika Westerberg ret = tb_available_bandwidth(tb, in, out, &estimated_up, 11396ce35635SMika Westerberg &estimated_down); 11406ce35635SMika Westerberg if (ret) { 11416ce35635SMika Westerberg tb_port_warn(in, 11426ce35635SMika Westerberg "failed to re-calculate estimated bandwidth\n"); 11436ce35635SMika Westerberg break; 11446ce35635SMika Westerberg } 11456ce35635SMika Westerberg 11466ce35635SMika Westerberg /* 11476ce35635SMika Westerberg * Estimated bandwidth includes: 11486ce35635SMika Westerberg * - already allocated bandwidth for the DP tunnel 11496ce35635SMika Westerberg * - available bandwidth along the path 11506ce35635SMika Westerberg * - bandwidth allocated for USB 3.x but not used. 11516ce35635SMika Westerberg */ 11526ce35635SMika Westerberg tb_port_dbg(in, "re-calculated estimated bandwidth %u/%u Mb/s\n", 11536ce35635SMika Westerberg estimated_up, estimated_down); 11546ce35635SMika Westerberg 11556ce35635SMika Westerberg if (in->sw->config.depth < out->sw->config.depth) 11566ce35635SMika Westerberg estimated_bw = estimated_down; 11576ce35635SMika Westerberg else 11586ce35635SMika Westerberg estimated_bw = estimated_up; 11596ce35635SMika Westerberg 11606ce35635SMika Westerberg if (usb4_dp_port_set_estimated_bw(in, estimated_bw)) 11616ce35635SMika Westerberg tb_port_warn(in, "failed to update estimated bandwidth\n"); 11626ce35635SMika Westerberg } 11636ce35635SMika Westerberg 11646ce35635SMika Westerberg if (first_tunnel) 11656ce35635SMika Westerberg tb_reclaim_usb3_bandwidth(tb, first_tunnel->src_port, 11666ce35635SMika Westerberg first_tunnel->dst_port); 11676ce35635SMika Westerberg 11686ce35635SMika Westerberg tb_dbg(tb, "bandwidth estimation for group %u done\n", group->index); 11696ce35635SMika Westerberg } 11706ce35635SMika Westerberg 11716ce35635SMika Westerberg static void tb_recalc_estimated_bandwidth(struct tb *tb) 11726ce35635SMika Westerberg { 11736ce35635SMika Westerberg struct tb_cm *tcm = tb_priv(tb); 11746ce35635SMika Westerberg int i; 11756ce35635SMika Westerberg 11766ce35635SMika Westerberg tb_dbg(tb, "bandwidth consumption changed, re-calculating estimated bandwidth\n"); 11776ce35635SMika Westerberg 11786ce35635SMika Westerberg for (i = 0; i < ARRAY_SIZE(tcm->groups); i++) { 11796ce35635SMika Westerberg struct tb_bandwidth_group *group = &tcm->groups[i]; 11806ce35635SMika Westerberg 11816ce35635SMika Westerberg if (!list_empty(&group->ports)) 11826ce35635SMika Westerberg tb_recalc_estimated_bandwidth_for_group(group); 11836ce35635SMika Westerberg } 11846ce35635SMika Westerberg 11856ce35635SMika Westerberg tb_dbg(tb, "bandwidth re-calculation done\n"); 11866ce35635SMika Westerberg } 11876ce35635SMika Westerberg 1188e876f34aSMika Westerberg static struct tb_port *tb_find_dp_out(struct tb *tb, struct tb_port *in) 1189e876f34aSMika Westerberg { 1190e876f34aSMika Westerberg struct tb_port *host_port, *port; 1191e876f34aSMika Westerberg struct tb_cm *tcm = tb_priv(tb); 1192e876f34aSMika Westerberg 1193e876f34aSMika Westerberg host_port = tb_route(in->sw) ? 1194e876f34aSMika Westerberg tb_port_at(tb_route(in->sw), tb->root_switch) : NULL; 1195e876f34aSMika Westerberg 1196e876f34aSMika Westerberg list_for_each_entry(port, &tcm->dp_resources, list) { 1197e876f34aSMika Westerberg if (!tb_port_is_dpout(port)) 1198e876f34aSMika Westerberg continue; 1199e876f34aSMika Westerberg 1200e876f34aSMika Westerberg if (tb_port_is_enabled(port)) { 1201b0ef48fcSMika Westerberg tb_port_dbg(port, "DP OUT in use\n"); 1202e876f34aSMika Westerberg continue; 1203e876f34aSMika Westerberg } 1204e876f34aSMika Westerberg 1205e876f34aSMika Westerberg tb_port_dbg(port, "DP OUT available\n"); 1206e876f34aSMika Westerberg 1207e876f34aSMika Westerberg /* 1208e876f34aSMika Westerberg * Keep the DP tunnel under the topology starting from 1209e876f34aSMika Westerberg * the same host router downstream port. 1210e876f34aSMika Westerberg */ 1211e876f34aSMika Westerberg if (host_port && tb_route(port->sw)) { 1212e876f34aSMika Westerberg struct tb_port *p; 1213e876f34aSMika Westerberg 1214e876f34aSMika Westerberg p = tb_port_at(tb_route(port->sw), tb->root_switch); 1215e876f34aSMika Westerberg if (p != host_port) 1216e876f34aSMika Westerberg continue; 1217e876f34aSMika Westerberg } 1218e876f34aSMika Westerberg 1219e876f34aSMika Westerberg return port; 1220e876f34aSMika Westerberg } 1221e876f34aSMika Westerberg 1222e876f34aSMika Westerberg return NULL; 1223e876f34aSMika Westerberg } 1224e876f34aSMika Westerberg 12258afe909bSMika Westerberg static void tb_tunnel_dp(struct tb *tb) 12264f807e47SMika Westerberg { 12279d2d0a5cSMika Westerberg int available_up, available_down, ret, link_nr; 12284f807e47SMika Westerberg struct tb_cm *tcm = tb_priv(tb); 12298afe909bSMika Westerberg struct tb_port *port, *in, *out; 12304f807e47SMika Westerberg struct tb_tunnel *tunnel; 12314f807e47SMika Westerberg 1232c6da62a2SMika Westerberg if (!tb_acpi_may_tunnel_dp()) { 1233c6da62a2SMika Westerberg tb_dbg(tb, "DP tunneling disabled, not creating tunnel\n"); 1234c6da62a2SMika Westerberg return; 1235c6da62a2SMika Westerberg } 1236c6da62a2SMika Westerberg 12378afe909bSMika Westerberg /* 12388afe909bSMika Westerberg * Find pair of inactive DP IN and DP OUT adapters and then 12398afe909bSMika Westerberg * establish a DP tunnel between them. 12408afe909bSMika Westerberg */ 12418afe909bSMika Westerberg tb_dbg(tb, "looking for DP IN <-> DP OUT pairs:\n"); 12424f807e47SMika Westerberg 12438afe909bSMika Westerberg in = NULL; 12448afe909bSMika Westerberg out = NULL; 12458afe909bSMika Westerberg list_for_each_entry(port, &tcm->dp_resources, list) { 1246e876f34aSMika Westerberg if (!tb_port_is_dpin(port)) 1247e876f34aSMika Westerberg continue; 1248e876f34aSMika Westerberg 12498afe909bSMika Westerberg if (tb_port_is_enabled(port)) { 1250b0ef48fcSMika Westerberg tb_port_dbg(port, "DP IN in use\n"); 12518afe909bSMika Westerberg continue; 12528afe909bSMika Westerberg } 12538afe909bSMika Westerberg 1254e876f34aSMika Westerberg tb_port_dbg(port, "DP IN available\n"); 12558afe909bSMika Westerberg 1256e876f34aSMika Westerberg out = tb_find_dp_out(tb, port); 1257e876f34aSMika Westerberg if (out) { 12588afe909bSMika Westerberg in = port; 1259e876f34aSMika Westerberg break; 1260e876f34aSMika Westerberg } 12618afe909bSMika Westerberg } 12628afe909bSMika Westerberg 12638afe909bSMika Westerberg if (!in) { 12648afe909bSMika Westerberg tb_dbg(tb, "no suitable DP IN adapter available, not tunneling\n"); 12658afe909bSMika Westerberg return; 12668afe909bSMika Westerberg } 12678afe909bSMika Westerberg if (!out) { 12688afe909bSMika Westerberg tb_dbg(tb, "no suitable DP OUT adapter available, not tunneling\n"); 12698afe909bSMika Westerberg return; 12708afe909bSMika Westerberg } 12718afe909bSMika Westerberg 12726ac6faeeSMika Westerberg /* 12739d2d0a5cSMika Westerberg * This is only applicable to links that are not bonded (so 12749d2d0a5cSMika Westerberg * when Thunderbolt 1 hardware is involved somewhere in the 12759d2d0a5cSMika Westerberg * topology). For these try to share the DP bandwidth between 12769d2d0a5cSMika Westerberg * the two lanes. 12779d2d0a5cSMika Westerberg */ 12789d2d0a5cSMika Westerberg link_nr = 1; 12799d2d0a5cSMika Westerberg list_for_each_entry(tunnel, &tcm->tunnel_list, list) { 12809d2d0a5cSMika Westerberg if (tb_tunnel_is_dp(tunnel)) { 12819d2d0a5cSMika Westerberg link_nr = 0; 12829d2d0a5cSMika Westerberg break; 12839d2d0a5cSMika Westerberg } 12849d2d0a5cSMika Westerberg } 12859d2d0a5cSMika Westerberg 12869d2d0a5cSMika Westerberg /* 12876ac6faeeSMika Westerberg * DP stream needs the domain to be active so runtime resume 12886ac6faeeSMika Westerberg * both ends of the tunnel. 12896ac6faeeSMika Westerberg * 12906ac6faeeSMika Westerberg * This should bring the routers in the middle active as well 12916ac6faeeSMika Westerberg * and keeps the domain from runtime suspending while the DP 12926ac6faeeSMika Westerberg * tunnel is active. 12936ac6faeeSMika Westerberg */ 12946ac6faeeSMika Westerberg pm_runtime_get_sync(&in->sw->dev); 12956ac6faeeSMika Westerberg pm_runtime_get_sync(&out->sw->dev); 12966ac6faeeSMika Westerberg 12978afe909bSMika Westerberg if (tb_switch_alloc_dp_resource(in->sw, in)) { 12988afe909bSMika Westerberg tb_port_dbg(in, "no resource available for DP IN, not tunneling\n"); 12996ac6faeeSMika Westerberg goto err_rpm_put; 13008afe909bSMika Westerberg } 13014f807e47SMika Westerberg 13026ce35635SMika Westerberg if (!tb_attach_bandwidth_group(tcm, in, out)) 13036ce35635SMika Westerberg goto err_dealloc_dp; 13046ce35635SMika Westerberg 13050bd680cdSMika Westerberg /* Make all unused USB3 bandwidth available for the new DP tunnel */ 13060bd680cdSMika Westerberg ret = tb_release_unused_usb3_bandwidth(tb, in, out); 13070bd680cdSMika Westerberg if (ret) { 13080bd680cdSMika Westerberg tb_warn(tb, "failed to release unused bandwidth\n"); 13096ce35635SMika Westerberg goto err_detach_group; 1310a11b88adSMika Westerberg } 1311a11b88adSMika Westerberg 13126ce35635SMika Westerberg ret = tb_available_bandwidth(tb, in, out, &available_up, &available_down); 13130bd680cdSMika Westerberg if (ret) 13146ce35635SMika Westerberg goto err_reclaim_usb; 1315a11b88adSMika Westerberg 13160bd680cdSMika Westerberg tb_dbg(tb, "available bandwidth for new DP tunnel %u/%u Mb/s\n", 13170bd680cdSMika Westerberg available_up, available_down); 13180bd680cdSMika Westerberg 13199d2d0a5cSMika Westerberg tunnel = tb_tunnel_alloc_dp(tb, in, out, link_nr, available_up, 13209d2d0a5cSMika Westerberg available_down); 13214f807e47SMika Westerberg if (!tunnel) { 13228afe909bSMika Westerberg tb_port_dbg(out, "could not allocate DP tunnel\n"); 13236ce35635SMika Westerberg goto err_reclaim_usb; 13244f807e47SMika Westerberg } 13254f807e47SMika Westerberg 13264f807e47SMika Westerberg if (tb_tunnel_activate(tunnel)) { 13274f807e47SMika Westerberg tb_port_info(out, "DP tunnel activation failed, aborting\n"); 13280bd680cdSMika Westerberg goto err_free; 13294f807e47SMika Westerberg } 13304f807e47SMika Westerberg 13314f807e47SMika Westerberg list_add_tail(&tunnel->list, &tcm->tunnel_list); 13320bd680cdSMika Westerberg tb_reclaim_usb3_bandwidth(tb, in, out); 13336ce35635SMika Westerberg 13346ce35635SMika Westerberg /* Update the domain with the new bandwidth estimation */ 13356ce35635SMika Westerberg tb_recalc_estimated_bandwidth(tb); 13366ce35635SMika Westerberg 13373084b48fSGil Fine /* 13383084b48fSGil Fine * In case of DP tunnel exists, change host router's 1st children 13393084b48fSGil Fine * TMU mode to HiFi for CL0s to work. 13403084b48fSGil Fine */ 13417d283f41SMika Westerberg tb_increase_tmu_accuracy(tunnel); 13428afe909bSMika Westerberg return; 13438afe909bSMika Westerberg 13440bd680cdSMika Westerberg err_free: 13450bd680cdSMika Westerberg tb_tunnel_free(tunnel); 13466ce35635SMika Westerberg err_reclaim_usb: 13470bd680cdSMika Westerberg tb_reclaim_usb3_bandwidth(tb, in, out); 13486ce35635SMika Westerberg err_detach_group: 13496ce35635SMika Westerberg tb_detach_bandwidth_group(in); 13500bd680cdSMika Westerberg err_dealloc_dp: 13518afe909bSMika Westerberg tb_switch_dealloc_dp_resource(in->sw, in); 13526ac6faeeSMika Westerberg err_rpm_put: 13536ac6faeeSMika Westerberg pm_runtime_mark_last_busy(&out->sw->dev); 13546ac6faeeSMika Westerberg pm_runtime_put_autosuspend(&out->sw->dev); 13556ac6faeeSMika Westerberg pm_runtime_mark_last_busy(&in->sw->dev); 13566ac6faeeSMika Westerberg pm_runtime_put_autosuspend(&in->sw->dev); 13574f807e47SMika Westerberg } 13584f807e47SMika Westerberg 13598afe909bSMika Westerberg static void tb_dp_resource_unavailable(struct tb *tb, struct tb_port *port) 13604f807e47SMika Westerberg { 13618afe909bSMika Westerberg struct tb_port *in, *out; 13628afe909bSMika Westerberg struct tb_tunnel *tunnel; 13638afe909bSMika Westerberg 13648afe909bSMika Westerberg if (tb_port_is_dpin(port)) { 13658afe909bSMika Westerberg tb_port_dbg(port, "DP IN resource unavailable\n"); 13668afe909bSMika Westerberg in = port; 13678afe909bSMika Westerberg out = NULL; 13688afe909bSMika Westerberg } else { 13698afe909bSMika Westerberg tb_port_dbg(port, "DP OUT resource unavailable\n"); 13708afe909bSMika Westerberg in = NULL; 13718afe909bSMika Westerberg out = port; 13728afe909bSMika Westerberg } 13738afe909bSMika Westerberg 13748afe909bSMika Westerberg tunnel = tb_find_tunnel(tb, TB_TUNNEL_DP, in, out); 13758afe909bSMika Westerberg tb_deactivate_and_free_tunnel(tunnel); 13768afe909bSMika Westerberg list_del_init(&port->list); 13778afe909bSMika Westerberg 13788afe909bSMika Westerberg /* 13798afe909bSMika Westerberg * See if there is another DP OUT port that can be used for 13808afe909bSMika Westerberg * to create another tunnel. 13818afe909bSMika Westerberg */ 13826ce35635SMika Westerberg tb_recalc_estimated_bandwidth(tb); 13838afe909bSMika Westerberg tb_tunnel_dp(tb); 13848afe909bSMika Westerberg } 13858afe909bSMika Westerberg 13868afe909bSMika Westerberg static void tb_dp_resource_available(struct tb *tb, struct tb_port *port) 13878afe909bSMika Westerberg { 13888afe909bSMika Westerberg struct tb_cm *tcm = tb_priv(tb); 13898afe909bSMika Westerberg struct tb_port *p; 13908afe909bSMika Westerberg 13918afe909bSMika Westerberg if (tb_port_is_enabled(port)) 13928afe909bSMika Westerberg return; 13938afe909bSMika Westerberg 13948afe909bSMika Westerberg list_for_each_entry(p, &tcm->dp_resources, list) { 13958afe909bSMika Westerberg if (p == port) 13968afe909bSMika Westerberg return; 13978afe909bSMika Westerberg } 13988afe909bSMika Westerberg 13998afe909bSMika Westerberg tb_port_dbg(port, "DP %s resource available\n", 14008afe909bSMika Westerberg tb_port_is_dpin(port) ? "IN" : "OUT"); 14018afe909bSMika Westerberg list_add_tail(&port->list, &tcm->dp_resources); 14028afe909bSMika Westerberg 14038afe909bSMika Westerberg /* Look for suitable DP IN <-> DP OUT pairs now */ 14048afe909bSMika Westerberg tb_tunnel_dp(tb); 14054f807e47SMika Westerberg } 14064f807e47SMika Westerberg 140781a2e3e4SMika Westerberg static void tb_disconnect_and_release_dp(struct tb *tb) 140881a2e3e4SMika Westerberg { 140981a2e3e4SMika Westerberg struct tb_cm *tcm = tb_priv(tb); 141081a2e3e4SMika Westerberg struct tb_tunnel *tunnel, *n; 141181a2e3e4SMika Westerberg 141281a2e3e4SMika Westerberg /* 141381a2e3e4SMika Westerberg * Tear down all DP tunnels and release their resources. They 141481a2e3e4SMika Westerberg * will be re-established after resume based on plug events. 141581a2e3e4SMika Westerberg */ 141681a2e3e4SMika Westerberg list_for_each_entry_safe_reverse(tunnel, n, &tcm->tunnel_list, list) { 141781a2e3e4SMika Westerberg if (tb_tunnel_is_dp(tunnel)) 141881a2e3e4SMika Westerberg tb_deactivate_and_free_tunnel(tunnel); 141981a2e3e4SMika Westerberg } 142081a2e3e4SMika Westerberg 142181a2e3e4SMika Westerberg while (!list_empty(&tcm->dp_resources)) { 142281a2e3e4SMika Westerberg struct tb_port *port; 142381a2e3e4SMika Westerberg 142481a2e3e4SMika Westerberg port = list_first_entry(&tcm->dp_resources, 142581a2e3e4SMika Westerberg struct tb_port, list); 142681a2e3e4SMika Westerberg list_del_init(&port->list); 142781a2e3e4SMika Westerberg } 142881a2e3e4SMika Westerberg } 142981a2e3e4SMika Westerberg 14303da88be2SMika Westerberg static int tb_disconnect_pci(struct tb *tb, struct tb_switch *sw) 14313da88be2SMika Westerberg { 14323da88be2SMika Westerberg struct tb_tunnel *tunnel; 14333da88be2SMika Westerberg struct tb_port *up; 14343da88be2SMika Westerberg 14353da88be2SMika Westerberg up = tb_switch_find_port(sw, TB_TYPE_PCIE_UP); 14363da88be2SMika Westerberg if (WARN_ON(!up)) 14373da88be2SMika Westerberg return -ENODEV; 14383da88be2SMika Westerberg 14393da88be2SMika Westerberg tunnel = tb_find_tunnel(tb, TB_TUNNEL_PCI, NULL, up); 14403da88be2SMika Westerberg if (WARN_ON(!tunnel)) 14413da88be2SMika Westerberg return -ENODEV; 14423da88be2SMika Westerberg 144330a4eca6SMika Westerberg tb_switch_xhci_disconnect(sw); 144430a4eca6SMika Westerberg 14453da88be2SMika Westerberg tb_tunnel_deactivate(tunnel); 14463da88be2SMika Westerberg list_del(&tunnel->list); 14473da88be2SMika Westerberg tb_tunnel_free(tunnel); 14483da88be2SMika Westerberg return 0; 14493da88be2SMika Westerberg } 14503da88be2SMika Westerberg 145199cabbb0SMika Westerberg static int tb_tunnel_pci(struct tb *tb, struct tb_switch *sw) 145299cabbb0SMika Westerberg { 145399cabbb0SMika Westerberg struct tb_port *up, *down, *port; 14549d3cce0bSMika Westerberg struct tb_cm *tcm = tb_priv(tb); 145599cabbb0SMika Westerberg struct tb_tunnel *tunnel; 14569d3cce0bSMika Westerberg 1457386e5e29SMika Westerberg up = tb_switch_find_port(sw, TB_TYPE_PCIE_UP); 145899cabbb0SMika Westerberg if (!up) 145999cabbb0SMika Westerberg return 0; 14603364f0c1SAndreas Noever 146199cabbb0SMika Westerberg /* 146299cabbb0SMika Westerberg * Look up available down port. Since we are chaining it should 146399cabbb0SMika Westerberg * be found right above this switch. 146499cabbb0SMika Westerberg */ 14657ce54221SGil Fine port = tb_switch_downstream_port(sw); 14667ce54221SGil Fine down = tb_find_pcie_down(tb_switch_parent(sw), port); 146799cabbb0SMika Westerberg if (!down) 146899cabbb0SMika Westerberg return 0; 14693364f0c1SAndreas Noever 147099cabbb0SMika Westerberg tunnel = tb_tunnel_alloc_pci(tb, up, down); 147199cabbb0SMika Westerberg if (!tunnel) 147299cabbb0SMika Westerberg return -ENOMEM; 14733364f0c1SAndreas Noever 147493f36adeSMika Westerberg if (tb_tunnel_activate(tunnel)) { 147599cabbb0SMika Westerberg tb_port_info(up, 14763364f0c1SAndreas Noever "PCIe tunnel activation failed, aborting\n"); 147793f36adeSMika Westerberg tb_tunnel_free(tunnel); 147899cabbb0SMika Westerberg return -EIO; 14793364f0c1SAndreas Noever } 14803364f0c1SAndreas Noever 148143f977bcSGil Fine /* 148243f977bcSGil Fine * PCIe L1 is needed to enable CL0s for Titan Ridge so enable it 148343f977bcSGil Fine * here. 148443f977bcSGil Fine */ 148543f977bcSGil Fine if (tb_switch_pcie_l1_enable(sw)) 148643f977bcSGil Fine tb_sw_warn(sw, "failed to enable PCIe L1 for Titan Ridge\n"); 148743f977bcSGil Fine 148830a4eca6SMika Westerberg if (tb_switch_xhci_connect(sw)) 148930a4eca6SMika Westerberg tb_sw_warn(sw, "failed to connect xHCI\n"); 149030a4eca6SMika Westerberg 149199cabbb0SMika Westerberg list_add_tail(&tunnel->list, &tcm->tunnel_list); 149299cabbb0SMika Westerberg return 0; 14933364f0c1SAndreas Noever } 14949da672a4SAndreas Noever 1495180b0689SMika Westerberg static int tb_approve_xdomain_paths(struct tb *tb, struct tb_xdomain *xd, 1496180b0689SMika Westerberg int transmit_path, int transmit_ring, 1497180b0689SMika Westerberg int receive_path, int receive_ring) 14987ea4cd6bSMika Westerberg { 14997ea4cd6bSMika Westerberg struct tb_cm *tcm = tb_priv(tb); 15007ea4cd6bSMika Westerberg struct tb_port *nhi_port, *dst_port; 15017ea4cd6bSMika Westerberg struct tb_tunnel *tunnel; 15027ea4cd6bSMika Westerberg struct tb_switch *sw; 1503*53ba2e16SMika Westerberg int ret; 15047ea4cd6bSMika Westerberg 15057ea4cd6bSMika Westerberg sw = tb_to_switch(xd->dev.parent); 15067ea4cd6bSMika Westerberg dst_port = tb_port_at(xd->route, sw); 1507386e5e29SMika Westerberg nhi_port = tb_switch_find_port(tb->root_switch, TB_TYPE_NHI); 15087ea4cd6bSMika Westerberg 15097ea4cd6bSMika Westerberg mutex_lock(&tb->lock); 1510*53ba2e16SMika Westerberg 1511*53ba2e16SMika Westerberg /* 1512*53ba2e16SMika Westerberg * When tunneling DMA paths the link should not enter CL states 1513*53ba2e16SMika Westerberg * so disable them now. 1514*53ba2e16SMika Westerberg */ 1515*53ba2e16SMika Westerberg tb_disable_clx(sw); 1516*53ba2e16SMika Westerberg 1517180b0689SMika Westerberg tunnel = tb_tunnel_alloc_dma(tb, nhi_port, dst_port, transmit_path, 1518180b0689SMika Westerberg transmit_ring, receive_path, receive_ring); 15197ea4cd6bSMika Westerberg if (!tunnel) { 1520*53ba2e16SMika Westerberg ret = -ENOMEM; 1521*53ba2e16SMika Westerberg goto err_clx; 15227ea4cd6bSMika Westerberg } 15237ea4cd6bSMika Westerberg 15247ea4cd6bSMika Westerberg if (tb_tunnel_activate(tunnel)) { 15257ea4cd6bSMika Westerberg tb_port_info(nhi_port, 15267ea4cd6bSMika Westerberg "DMA tunnel activation failed, aborting\n"); 1527*53ba2e16SMika Westerberg ret = -EIO; 1528*53ba2e16SMika Westerberg goto err_free; 15297ea4cd6bSMika Westerberg } 15307ea4cd6bSMika Westerberg 15317ea4cd6bSMika Westerberg list_add_tail(&tunnel->list, &tcm->tunnel_list); 15327ea4cd6bSMika Westerberg mutex_unlock(&tb->lock); 15337ea4cd6bSMika Westerberg return 0; 1534*53ba2e16SMika Westerberg 1535*53ba2e16SMika Westerberg err_free: 1536*53ba2e16SMika Westerberg tb_tunnel_free(tunnel); 1537*53ba2e16SMika Westerberg err_clx: 1538*53ba2e16SMika Westerberg tb_enable_clx(sw); 1539*53ba2e16SMika Westerberg mutex_unlock(&tb->lock); 1540*53ba2e16SMika Westerberg 1541*53ba2e16SMika Westerberg return ret; 15427ea4cd6bSMika Westerberg } 15437ea4cd6bSMika Westerberg 1544180b0689SMika Westerberg static void __tb_disconnect_xdomain_paths(struct tb *tb, struct tb_xdomain *xd, 1545180b0689SMika Westerberg int transmit_path, int transmit_ring, 1546180b0689SMika Westerberg int receive_path, int receive_ring) 15477ea4cd6bSMika Westerberg { 1548180b0689SMika Westerberg struct tb_cm *tcm = tb_priv(tb); 1549180b0689SMika Westerberg struct tb_port *nhi_port, *dst_port; 1550180b0689SMika Westerberg struct tb_tunnel *tunnel, *n; 15517ea4cd6bSMika Westerberg struct tb_switch *sw; 15527ea4cd6bSMika Westerberg 15537ea4cd6bSMika Westerberg sw = tb_to_switch(xd->dev.parent); 15547ea4cd6bSMika Westerberg dst_port = tb_port_at(xd->route, sw); 1555180b0689SMika Westerberg nhi_port = tb_switch_find_port(tb->root_switch, TB_TYPE_NHI); 15567ea4cd6bSMika Westerberg 1557180b0689SMika Westerberg list_for_each_entry_safe(tunnel, n, &tcm->tunnel_list, list) { 1558180b0689SMika Westerberg if (!tb_tunnel_is_dma(tunnel)) 1559180b0689SMika Westerberg continue; 1560180b0689SMika Westerberg if (tunnel->src_port != nhi_port || tunnel->dst_port != dst_port) 1561180b0689SMika Westerberg continue; 1562180b0689SMika Westerberg 1563180b0689SMika Westerberg if (tb_tunnel_match_dma(tunnel, transmit_path, transmit_ring, 1564180b0689SMika Westerberg receive_path, receive_ring)) 15658afe909bSMika Westerberg tb_deactivate_and_free_tunnel(tunnel); 15667ea4cd6bSMika Westerberg } 1567*53ba2e16SMika Westerberg 1568*53ba2e16SMika Westerberg /* 1569*53ba2e16SMika Westerberg * Try to re-enable CL states now, it is OK if this fails 1570*53ba2e16SMika Westerberg * because we may still have another DMA tunnel active through 1571*53ba2e16SMika Westerberg * the same host router USB4 downstream port. 1572*53ba2e16SMika Westerberg */ 1573*53ba2e16SMika Westerberg tb_enable_clx(sw); 1574180b0689SMika Westerberg } 15757ea4cd6bSMika Westerberg 1576180b0689SMika Westerberg static int tb_disconnect_xdomain_paths(struct tb *tb, struct tb_xdomain *xd, 1577180b0689SMika Westerberg int transmit_path, int transmit_ring, 1578180b0689SMika Westerberg int receive_path, int receive_ring) 15797ea4cd6bSMika Westerberg { 15807ea4cd6bSMika Westerberg if (!xd->is_unplugged) { 15817ea4cd6bSMika Westerberg mutex_lock(&tb->lock); 1582180b0689SMika Westerberg __tb_disconnect_xdomain_paths(tb, xd, transmit_path, 1583180b0689SMika Westerberg transmit_ring, receive_path, 1584180b0689SMika Westerberg receive_ring); 15857ea4cd6bSMika Westerberg mutex_unlock(&tb->lock); 15867ea4cd6bSMika Westerberg } 15877ea4cd6bSMika Westerberg return 0; 15887ea4cd6bSMika Westerberg } 15897ea4cd6bSMika Westerberg 1590d6cc51cdSAndreas Noever /* hotplug handling */ 1591d6cc51cdSAndreas Noever 1592877e50b3SLee Jones /* 1593d6cc51cdSAndreas Noever * tb_handle_hotplug() - handle hotplug event 1594d6cc51cdSAndreas Noever * 1595d6cc51cdSAndreas Noever * Executes on tb->wq. 1596d6cc51cdSAndreas Noever */ 1597d6cc51cdSAndreas Noever static void tb_handle_hotplug(struct work_struct *work) 1598d6cc51cdSAndreas Noever { 1599d6cc51cdSAndreas Noever struct tb_hotplug_event *ev = container_of(work, typeof(*ev), work); 1600d6cc51cdSAndreas Noever struct tb *tb = ev->tb; 16019d3cce0bSMika Westerberg struct tb_cm *tcm = tb_priv(tb); 1602053596d9SAndreas Noever struct tb_switch *sw; 1603053596d9SAndreas Noever struct tb_port *port; 1604284652a4SMika Westerberg 16056ac6faeeSMika Westerberg /* Bring the domain back from sleep if it was suspended */ 16066ac6faeeSMika Westerberg pm_runtime_get_sync(&tb->dev); 16076ac6faeeSMika Westerberg 1608d6cc51cdSAndreas Noever mutex_lock(&tb->lock); 16099d3cce0bSMika Westerberg if (!tcm->hotplug_active) 1610d6cc51cdSAndreas Noever goto out; /* during init, suspend or shutdown */ 1611d6cc51cdSAndreas Noever 16128f965efdSMika Westerberg sw = tb_switch_find_by_route(tb, ev->route); 1613053596d9SAndreas Noever if (!sw) { 1614053596d9SAndreas Noever tb_warn(tb, 1615053596d9SAndreas Noever "hotplug event from non existent switch %llx:%x (unplug: %d)\n", 1616053596d9SAndreas Noever ev->route, ev->port, ev->unplug); 1617053596d9SAndreas Noever goto out; 1618053596d9SAndreas Noever } 1619053596d9SAndreas Noever if (ev->port > sw->config.max_port_number) { 1620053596d9SAndreas Noever tb_warn(tb, 1621053596d9SAndreas Noever "hotplug event from non existent port %llx:%x (unplug: %d)\n", 1622053596d9SAndreas Noever ev->route, ev->port, ev->unplug); 16238f965efdSMika Westerberg goto put_sw; 1624053596d9SAndreas Noever } 1625053596d9SAndreas Noever port = &sw->ports[ev->port]; 1626053596d9SAndreas Noever if (tb_is_upstream_port(port)) { 1627dfe40ca4SMika Westerberg tb_dbg(tb, "hotplug event for upstream port %llx:%x (unplug: %d)\n", 1628053596d9SAndreas Noever ev->route, ev->port, ev->unplug); 16298f965efdSMika Westerberg goto put_sw; 1630053596d9SAndreas Noever } 16316ac6faeeSMika Westerberg 16326ac6faeeSMika Westerberg pm_runtime_get_sync(&sw->dev); 16336ac6faeeSMika Westerberg 1634053596d9SAndreas Noever if (ev->unplug) { 1635dacb1287SKranthi Kuntala tb_retimer_remove_all(port); 1636dacb1287SKranthi Kuntala 1637dfe40ca4SMika Westerberg if (tb_port_has_remote(port)) { 16387ea4cd6bSMika Westerberg tb_port_dbg(port, "switch unplugged\n"); 1639aae20bb6SLukas Wunner tb_sw_set_unplugged(port->remote->sw); 16403364f0c1SAndreas Noever tb_free_invalid_tunnels(tb); 16418afe909bSMika Westerberg tb_remove_dp_resources(port->remote->sw); 1642cf29b9afSRajmohan Mani tb_switch_tmu_disable(port->remote->sw); 1643de462039SMika Westerberg tb_switch_unconfigure_link(port->remote->sw); 164491c0c120SMika Westerberg tb_switch_lane_bonding_disable(port->remote->sw); 1645bfe778acSMika Westerberg tb_switch_remove(port->remote->sw); 1646053596d9SAndreas Noever port->remote = NULL; 1647dfe40ca4SMika Westerberg if (port->dual_link_port) 1648dfe40ca4SMika Westerberg port->dual_link_port->remote = NULL; 16498afe909bSMika Westerberg /* Maybe we can create another DP tunnel */ 16506ce35635SMika Westerberg tb_recalc_estimated_bandwidth(tb); 16518afe909bSMika Westerberg tb_tunnel_dp(tb); 16527ea4cd6bSMika Westerberg } else if (port->xdomain) { 16537ea4cd6bSMika Westerberg struct tb_xdomain *xd = tb_xdomain_get(port->xdomain); 16547ea4cd6bSMika Westerberg 16557ea4cd6bSMika Westerberg tb_port_dbg(port, "xdomain unplugged\n"); 16567ea4cd6bSMika Westerberg /* 16577ea4cd6bSMika Westerberg * Service drivers are unbound during 16587ea4cd6bSMika Westerberg * tb_xdomain_remove() so setting XDomain as 16597ea4cd6bSMika Westerberg * unplugged here prevents deadlock if they call 16607ea4cd6bSMika Westerberg * tb_xdomain_disable_paths(). We will tear down 1661180b0689SMika Westerberg * all the tunnels below. 16627ea4cd6bSMika Westerberg */ 16637ea4cd6bSMika Westerberg xd->is_unplugged = true; 16647ea4cd6bSMika Westerberg tb_xdomain_remove(xd); 16657ea4cd6bSMika Westerberg port->xdomain = NULL; 1666180b0689SMika Westerberg __tb_disconnect_xdomain_paths(tb, xd, -1, -1, -1, -1); 16677ea4cd6bSMika Westerberg tb_xdomain_put(xd); 1668284652a4SMika Westerberg tb_port_unconfigure_xdomain(port); 16698afe909bSMika Westerberg } else if (tb_port_is_dpout(port) || tb_port_is_dpin(port)) { 16708afe909bSMika Westerberg tb_dp_resource_unavailable(tb, port); 167130a4eca6SMika Westerberg } else if (!port->port) { 167230a4eca6SMika Westerberg tb_sw_dbg(sw, "xHCI disconnect request\n"); 167330a4eca6SMika Westerberg tb_switch_xhci_disconnect(sw); 1674053596d9SAndreas Noever } else { 167562efe699SMika Westerberg tb_port_dbg(port, 1676053596d9SAndreas Noever "got unplug event for disconnected port, ignoring\n"); 1677053596d9SAndreas Noever } 1678053596d9SAndreas Noever } else if (port->remote) { 167962efe699SMika Westerberg tb_port_dbg(port, "got plug event for connected port, ignoring\n"); 168030a4eca6SMika Westerberg } else if (!port->port && sw->authorized) { 168130a4eca6SMika Westerberg tb_sw_dbg(sw, "xHCI connect request\n"); 168230a4eca6SMika Westerberg tb_switch_xhci_connect(sw); 1683053596d9SAndreas Noever } else { 1684344e0643SMika Westerberg if (tb_port_is_null(port)) { 168562efe699SMika Westerberg tb_port_dbg(port, "hotplug: scanning\n"); 1686053596d9SAndreas Noever tb_scan_port(port); 168799cabbb0SMika Westerberg if (!port->remote) 168862efe699SMika Westerberg tb_port_dbg(port, "hotplug: no switch found\n"); 16898afe909bSMika Westerberg } else if (tb_port_is_dpout(port) || tb_port_is_dpin(port)) { 16908afe909bSMika Westerberg tb_dp_resource_available(tb, port); 1691053596d9SAndreas Noever } 1692344e0643SMika Westerberg } 16938f965efdSMika Westerberg 16946ac6faeeSMika Westerberg pm_runtime_mark_last_busy(&sw->dev); 16956ac6faeeSMika Westerberg pm_runtime_put_autosuspend(&sw->dev); 16966ac6faeeSMika Westerberg 16978f965efdSMika Westerberg put_sw: 16988f965efdSMika Westerberg tb_switch_put(sw); 1699d6cc51cdSAndreas Noever out: 1700d6cc51cdSAndreas Noever mutex_unlock(&tb->lock); 17016ac6faeeSMika Westerberg 17026ac6faeeSMika Westerberg pm_runtime_mark_last_busy(&tb->dev); 17036ac6faeeSMika Westerberg pm_runtime_put_autosuspend(&tb->dev); 17046ac6faeeSMika Westerberg 1705d6cc51cdSAndreas Noever kfree(ev); 1706d6cc51cdSAndreas Noever } 1707d6cc51cdSAndreas Noever 17086ce35635SMika Westerberg static int tb_alloc_dp_bandwidth(struct tb_tunnel *tunnel, int *requested_up, 17096ce35635SMika Westerberg int *requested_down) 17106ce35635SMika Westerberg { 17116ce35635SMika Westerberg int allocated_up, allocated_down, available_up, available_down, ret; 17126ce35635SMika Westerberg int requested_up_corrected, requested_down_corrected, granularity; 17136ce35635SMika Westerberg int max_up, max_down, max_up_rounded, max_down_rounded; 17146ce35635SMika Westerberg struct tb *tb = tunnel->tb; 17156ce35635SMika Westerberg struct tb_port *in, *out; 17166ce35635SMika Westerberg 17176ce35635SMika Westerberg ret = tb_tunnel_allocated_bandwidth(tunnel, &allocated_up, &allocated_down); 17186ce35635SMika Westerberg if (ret) 17196ce35635SMika Westerberg return ret; 17206ce35635SMika Westerberg 17216ce35635SMika Westerberg in = tunnel->src_port; 17226ce35635SMika Westerberg out = tunnel->dst_port; 17236ce35635SMika Westerberg 17246ce35635SMika Westerberg tb_port_dbg(in, "bandwidth allocated currently %d/%d Mb/s\n", 17256ce35635SMika Westerberg allocated_up, allocated_down); 17266ce35635SMika Westerberg 17276ce35635SMika Westerberg /* 17286ce35635SMika Westerberg * If we get rounded up request from graphics side, say HBR2 x 4 17296ce35635SMika Westerberg * that is 17500 instead of 17280 (this is because of the 17306ce35635SMika Westerberg * granularity), we allow it too. Here the graphics has already 17316ce35635SMika Westerberg * negotiated with the DPRX the maximum possible rates (which is 17326ce35635SMika Westerberg * 17280 in this case). 17336ce35635SMika Westerberg * 17346ce35635SMika Westerberg * Since the link cannot go higher than 17280 we use that in our 17356ce35635SMika Westerberg * calculations but the DP IN adapter Allocated BW write must be 17366ce35635SMika Westerberg * the same value (17500) otherwise the adapter will mark it as 17376ce35635SMika Westerberg * failed for graphics. 17386ce35635SMika Westerberg */ 17396ce35635SMika Westerberg ret = tb_tunnel_maximum_bandwidth(tunnel, &max_up, &max_down); 17406ce35635SMika Westerberg if (ret) 17416ce35635SMika Westerberg return ret; 17426ce35635SMika Westerberg 17436ce35635SMika Westerberg ret = usb4_dp_port_granularity(in); 17446ce35635SMika Westerberg if (ret < 0) 17456ce35635SMika Westerberg return ret; 17466ce35635SMika Westerberg granularity = ret; 17476ce35635SMika Westerberg 17486ce35635SMika Westerberg max_up_rounded = roundup(max_up, granularity); 17496ce35635SMika Westerberg max_down_rounded = roundup(max_down, granularity); 17506ce35635SMika Westerberg 17516ce35635SMika Westerberg /* 17526ce35635SMika Westerberg * This will "fix" the request down to the maximum supported 17536ce35635SMika Westerberg * rate * lanes if it is at the maximum rounded up level. 17546ce35635SMika Westerberg */ 17556ce35635SMika Westerberg requested_up_corrected = *requested_up; 17566ce35635SMika Westerberg if (requested_up_corrected == max_up_rounded) 17576ce35635SMika Westerberg requested_up_corrected = max_up; 17586ce35635SMika Westerberg else if (requested_up_corrected < 0) 17596ce35635SMika Westerberg requested_up_corrected = 0; 17606ce35635SMika Westerberg requested_down_corrected = *requested_down; 17616ce35635SMika Westerberg if (requested_down_corrected == max_down_rounded) 17626ce35635SMika Westerberg requested_down_corrected = max_down; 17636ce35635SMika Westerberg else if (requested_down_corrected < 0) 17646ce35635SMika Westerberg requested_down_corrected = 0; 17656ce35635SMika Westerberg 17666ce35635SMika Westerberg tb_port_dbg(in, "corrected bandwidth request %d/%d Mb/s\n", 17676ce35635SMika Westerberg requested_up_corrected, requested_down_corrected); 17686ce35635SMika Westerberg 17696ce35635SMika Westerberg if ((*requested_up >= 0 && requested_up_corrected > max_up_rounded) || 17706ce35635SMika Westerberg (*requested_down >= 0 && requested_down_corrected > max_down_rounded)) { 17716ce35635SMika Westerberg tb_port_dbg(in, "bandwidth request too high (%d/%d Mb/s > %d/%d Mb/s)\n", 17726ce35635SMika Westerberg requested_up_corrected, requested_down_corrected, 17736ce35635SMika Westerberg max_up_rounded, max_down_rounded); 17746ce35635SMika Westerberg return -ENOBUFS; 17756ce35635SMika Westerberg } 17766ce35635SMika Westerberg 17776ce35635SMika Westerberg if ((*requested_up >= 0 && requested_up_corrected <= allocated_up) || 17786ce35635SMika Westerberg (*requested_down >= 0 && requested_down_corrected <= allocated_down)) { 17796ce35635SMika Westerberg /* 17806ce35635SMika Westerberg * If requested bandwidth is less or equal than what is 17816ce35635SMika Westerberg * currently allocated to that tunnel we simply change 17826ce35635SMika Westerberg * the reservation of the tunnel. Since all the tunnels 17836ce35635SMika Westerberg * going out from the same USB4 port are in the same 17846ce35635SMika Westerberg * group the released bandwidth will be taken into 17856ce35635SMika Westerberg * account for the other tunnels automatically below. 17866ce35635SMika Westerberg */ 17876ce35635SMika Westerberg return tb_tunnel_alloc_bandwidth(tunnel, requested_up, 17886ce35635SMika Westerberg requested_down); 17896ce35635SMika Westerberg } 17906ce35635SMika Westerberg 17916ce35635SMika Westerberg /* 17926ce35635SMika Westerberg * More bandwidth is requested. Release all the potential 17936ce35635SMika Westerberg * bandwidth from USB3 first. 17946ce35635SMika Westerberg */ 17956ce35635SMika Westerberg ret = tb_release_unused_usb3_bandwidth(tb, in, out); 17966ce35635SMika Westerberg if (ret) 17976ce35635SMika Westerberg return ret; 17986ce35635SMika Westerberg 17996ce35635SMika Westerberg /* 18006ce35635SMika Westerberg * Then go over all tunnels that cross the same USB4 ports (they 18016ce35635SMika Westerberg * are also in the same group but we use the same function here 18026ce35635SMika Westerberg * that we use with the normal bandwidth allocation). 18036ce35635SMika Westerberg */ 18046ce35635SMika Westerberg ret = tb_available_bandwidth(tb, in, out, &available_up, &available_down); 18056ce35635SMika Westerberg if (ret) 18066ce35635SMika Westerberg goto reclaim; 18076ce35635SMika Westerberg 18086ce35635SMika Westerberg tb_port_dbg(in, "bandwidth available for allocation %d/%d Mb/s\n", 18096ce35635SMika Westerberg available_up, available_down); 18106ce35635SMika Westerberg 18116ce35635SMika Westerberg if ((*requested_up >= 0 && available_up >= requested_up_corrected) || 18126ce35635SMika Westerberg (*requested_down >= 0 && available_down >= requested_down_corrected)) { 18136ce35635SMika Westerberg ret = tb_tunnel_alloc_bandwidth(tunnel, requested_up, 18146ce35635SMika Westerberg requested_down); 18156ce35635SMika Westerberg } else { 18166ce35635SMika Westerberg ret = -ENOBUFS; 18176ce35635SMika Westerberg } 18186ce35635SMika Westerberg 18196ce35635SMika Westerberg reclaim: 18206ce35635SMika Westerberg tb_reclaim_usb3_bandwidth(tb, in, out); 18216ce35635SMika Westerberg return ret; 18226ce35635SMika Westerberg } 18236ce35635SMika Westerberg 18246ce35635SMika Westerberg static void tb_handle_dp_bandwidth_request(struct work_struct *work) 18256ce35635SMika Westerberg { 18266ce35635SMika Westerberg struct tb_hotplug_event *ev = container_of(work, typeof(*ev), work); 18276ce35635SMika Westerberg int requested_bw, requested_up, requested_down, ret; 18286ce35635SMika Westerberg struct tb_port *in, *out; 18296ce35635SMika Westerberg struct tb_tunnel *tunnel; 18306ce35635SMika Westerberg struct tb *tb = ev->tb; 18316ce35635SMika Westerberg struct tb_cm *tcm = tb_priv(tb); 18326ce35635SMika Westerberg struct tb_switch *sw; 18336ce35635SMika Westerberg 18346ce35635SMika Westerberg pm_runtime_get_sync(&tb->dev); 18356ce35635SMika Westerberg 18366ce35635SMika Westerberg mutex_lock(&tb->lock); 18376ce35635SMika Westerberg if (!tcm->hotplug_active) 18386ce35635SMika Westerberg goto unlock; 18396ce35635SMika Westerberg 18406ce35635SMika Westerberg sw = tb_switch_find_by_route(tb, ev->route); 18416ce35635SMika Westerberg if (!sw) { 18426ce35635SMika Westerberg tb_warn(tb, "bandwidth request from non-existent router %llx\n", 18436ce35635SMika Westerberg ev->route); 18446ce35635SMika Westerberg goto unlock; 18456ce35635SMika Westerberg } 18466ce35635SMika Westerberg 18476ce35635SMika Westerberg in = &sw->ports[ev->port]; 18486ce35635SMika Westerberg if (!tb_port_is_dpin(in)) { 18496ce35635SMika Westerberg tb_port_warn(in, "bandwidth request to non-DP IN adapter\n"); 18506ce35635SMika Westerberg goto unlock; 18516ce35635SMika Westerberg } 18526ce35635SMika Westerberg 18536ce35635SMika Westerberg tb_port_dbg(in, "handling bandwidth allocation request\n"); 18546ce35635SMika Westerberg 18556ce35635SMika Westerberg if (!usb4_dp_port_bw_mode_enabled(in)) { 18566ce35635SMika Westerberg tb_port_warn(in, "bandwidth allocation mode not enabled\n"); 18576ce35635SMika Westerberg goto unlock; 18586ce35635SMika Westerberg } 18596ce35635SMika Westerberg 1860ace75e18SMika Westerberg ret = usb4_dp_port_requested_bw(in); 1861ace75e18SMika Westerberg if (ret < 0) { 1862ace75e18SMika Westerberg if (ret == -ENODATA) 18636ce35635SMika Westerberg tb_port_dbg(in, "no bandwidth request active\n"); 1864ace75e18SMika Westerberg else 1865ace75e18SMika Westerberg tb_port_warn(in, "failed to read requested bandwidth\n"); 18666ce35635SMika Westerberg goto unlock; 18676ce35635SMika Westerberg } 1868ace75e18SMika Westerberg requested_bw = ret; 18696ce35635SMika Westerberg 18706ce35635SMika Westerberg tb_port_dbg(in, "requested bandwidth %d Mb/s\n", requested_bw); 18716ce35635SMika Westerberg 18726ce35635SMika Westerberg tunnel = tb_find_tunnel(tb, TB_TUNNEL_DP, in, NULL); 18736ce35635SMika Westerberg if (!tunnel) { 18746ce35635SMika Westerberg tb_port_warn(in, "failed to find tunnel\n"); 18756ce35635SMika Westerberg goto unlock; 18766ce35635SMika Westerberg } 18776ce35635SMika Westerberg 18786ce35635SMika Westerberg out = tunnel->dst_port; 18796ce35635SMika Westerberg 18806ce35635SMika Westerberg if (in->sw->config.depth < out->sw->config.depth) { 18816ce35635SMika Westerberg requested_up = -1; 18826ce35635SMika Westerberg requested_down = requested_bw; 18836ce35635SMika Westerberg } else { 18846ce35635SMika Westerberg requested_up = requested_bw; 18856ce35635SMika Westerberg requested_down = -1; 18866ce35635SMika Westerberg } 18876ce35635SMika Westerberg 18886ce35635SMika Westerberg ret = tb_alloc_dp_bandwidth(tunnel, &requested_up, &requested_down); 18896ce35635SMika Westerberg if (ret) { 18906ce35635SMika Westerberg if (ret == -ENOBUFS) 18916ce35635SMika Westerberg tb_port_warn(in, "not enough bandwidth available\n"); 18926ce35635SMika Westerberg else 18936ce35635SMika Westerberg tb_port_warn(in, "failed to change bandwidth allocation\n"); 18946ce35635SMika Westerberg } else { 18956ce35635SMika Westerberg tb_port_dbg(in, "bandwidth allocation changed to %d/%d Mb/s\n", 18966ce35635SMika Westerberg requested_up, requested_down); 18976ce35635SMika Westerberg 18986ce35635SMika Westerberg /* Update other clients about the allocation change */ 18996ce35635SMika Westerberg tb_recalc_estimated_bandwidth(tb); 19006ce35635SMika Westerberg } 19016ce35635SMika Westerberg 19026ce35635SMika Westerberg unlock: 19036ce35635SMika Westerberg mutex_unlock(&tb->lock); 19046ce35635SMika Westerberg 19056ce35635SMika Westerberg pm_runtime_mark_last_busy(&tb->dev); 19066ce35635SMika Westerberg pm_runtime_put_autosuspend(&tb->dev); 19076ce35635SMika Westerberg } 19086ce35635SMika Westerberg 19096ce35635SMika Westerberg static void tb_queue_dp_bandwidth_request(struct tb *tb, u64 route, u8 port) 19106ce35635SMika Westerberg { 19116ce35635SMika Westerberg struct tb_hotplug_event *ev; 19126ce35635SMika Westerberg 19136ce35635SMika Westerberg ev = kmalloc(sizeof(*ev), GFP_KERNEL); 19146ce35635SMika Westerberg if (!ev) 19156ce35635SMika Westerberg return; 19166ce35635SMika Westerberg 19176ce35635SMika Westerberg ev->tb = tb; 19186ce35635SMika Westerberg ev->route = route; 19196ce35635SMika Westerberg ev->port = port; 19206ce35635SMika Westerberg INIT_WORK(&ev->work, tb_handle_dp_bandwidth_request); 19216ce35635SMika Westerberg queue_work(tb->wq, &ev->work); 19226ce35635SMika Westerberg } 19236ce35635SMika Westerberg 19246ce35635SMika Westerberg static void tb_handle_notification(struct tb *tb, u64 route, 19256ce35635SMika Westerberg const struct cfg_error_pkg *error) 19266ce35635SMika Westerberg { 19276ce35635SMika Westerberg if (tb_cfg_ack_notification(tb->ctl, route, error)) 19286ce35635SMika Westerberg tb_warn(tb, "could not ack notification on %llx\n", route); 19296ce35635SMika Westerberg 19306ce35635SMika Westerberg switch (error->error) { 19316ce35635SMika Westerberg case TB_CFG_ERROR_DP_BW: 19326ce35635SMika Westerberg tb_queue_dp_bandwidth_request(tb, route, error->port); 19336ce35635SMika Westerberg break; 19346ce35635SMika Westerberg 19356ce35635SMika Westerberg default: 19366ce35635SMika Westerberg /* Ack is enough */ 19376ce35635SMika Westerberg return; 19386ce35635SMika Westerberg } 19396ce35635SMika Westerberg } 19406ce35635SMika Westerberg 1941877e50b3SLee Jones /* 1942d6cc51cdSAndreas Noever * tb_schedule_hotplug_handler() - callback function for the control channel 1943d6cc51cdSAndreas Noever * 1944d6cc51cdSAndreas Noever * Delegates to tb_handle_hotplug. 1945d6cc51cdSAndreas Noever */ 194681a54b5eSMika Westerberg static void tb_handle_event(struct tb *tb, enum tb_cfg_pkg_type type, 194781a54b5eSMika Westerberg const void *buf, size_t size) 1948d6cc51cdSAndreas Noever { 194981a54b5eSMika Westerberg const struct cfg_event_pkg *pkg = buf; 19506ce35635SMika Westerberg u64 route = tb_cfg_get_route(&pkg->header); 195181a54b5eSMika Westerberg 19526ce35635SMika Westerberg switch (type) { 19536ce35635SMika Westerberg case TB_CFG_PKG_ERROR: 19546ce35635SMika Westerberg tb_handle_notification(tb, route, (const struct cfg_error_pkg *)buf); 19556ce35635SMika Westerberg return; 19566ce35635SMika Westerberg case TB_CFG_PKG_EVENT: 19576ce35635SMika Westerberg break; 19586ce35635SMika Westerberg default: 195981a54b5eSMika Westerberg tb_warn(tb, "unexpected event %#x, ignoring\n", type); 196081a54b5eSMika Westerberg return; 196181a54b5eSMika Westerberg } 196281a54b5eSMika Westerberg 1963210e9f56SMika Westerberg if (tb_cfg_ack_plug(tb->ctl, route, pkg->port, pkg->unplug)) { 196481a54b5eSMika Westerberg tb_warn(tb, "could not ack plug event on %llx:%x\n", route, 196581a54b5eSMika Westerberg pkg->port); 196681a54b5eSMika Westerberg } 196781a54b5eSMika Westerberg 19684f807e47SMika Westerberg tb_queue_hotplug(tb, route, pkg->port, pkg->unplug); 1969d6cc51cdSAndreas Noever } 1970d6cc51cdSAndreas Noever 19719d3cce0bSMika Westerberg static void tb_stop(struct tb *tb) 1972d6cc51cdSAndreas Noever { 19739d3cce0bSMika Westerberg struct tb_cm *tcm = tb_priv(tb); 197493f36adeSMika Westerberg struct tb_tunnel *tunnel; 197593f36adeSMika Westerberg struct tb_tunnel *n; 19763364f0c1SAndreas Noever 19776ac6faeeSMika Westerberg cancel_delayed_work(&tcm->remove_work); 19783364f0c1SAndreas Noever /* tunnels are only present after everything has been initialized */ 19797ea4cd6bSMika Westerberg list_for_each_entry_safe(tunnel, n, &tcm->tunnel_list, list) { 19807ea4cd6bSMika Westerberg /* 19817ea4cd6bSMika Westerberg * DMA tunnels require the driver to be functional so we 19827ea4cd6bSMika Westerberg * tear them down. Other protocol tunnels can be left 19837ea4cd6bSMika Westerberg * intact. 19847ea4cd6bSMika Westerberg */ 19857ea4cd6bSMika Westerberg if (tb_tunnel_is_dma(tunnel)) 19867ea4cd6bSMika Westerberg tb_tunnel_deactivate(tunnel); 198793f36adeSMika Westerberg tb_tunnel_free(tunnel); 19887ea4cd6bSMika Westerberg } 1989bfe778acSMika Westerberg tb_switch_remove(tb->root_switch); 19909d3cce0bSMika Westerberg tcm->hotplug_active = false; /* signal tb_handle_hotplug to quit */ 1991d6cc51cdSAndreas Noever } 1992d6cc51cdSAndreas Noever 199399cabbb0SMika Westerberg static int tb_scan_finalize_switch(struct device *dev, void *data) 199499cabbb0SMika Westerberg { 199599cabbb0SMika Westerberg if (tb_is_switch(dev)) { 199699cabbb0SMika Westerberg struct tb_switch *sw = tb_to_switch(dev); 199799cabbb0SMika Westerberg 199899cabbb0SMika Westerberg /* 199999cabbb0SMika Westerberg * If we found that the switch was already setup by the 200099cabbb0SMika Westerberg * boot firmware, mark it as authorized now before we 200199cabbb0SMika Westerberg * send uevent to userspace. 200299cabbb0SMika Westerberg */ 200399cabbb0SMika Westerberg if (sw->boot) 200499cabbb0SMika Westerberg sw->authorized = 1; 200599cabbb0SMika Westerberg 200699cabbb0SMika Westerberg dev_set_uevent_suppress(dev, false); 200799cabbb0SMika Westerberg kobject_uevent(&dev->kobj, KOBJ_ADD); 200899cabbb0SMika Westerberg device_for_each_child(dev, NULL, tb_scan_finalize_switch); 200999cabbb0SMika Westerberg } 201099cabbb0SMika Westerberg 201199cabbb0SMika Westerberg return 0; 201299cabbb0SMika Westerberg } 201399cabbb0SMika Westerberg 20149d3cce0bSMika Westerberg static int tb_start(struct tb *tb) 2015d6cc51cdSAndreas Noever { 20169d3cce0bSMika Westerberg struct tb_cm *tcm = tb_priv(tb); 2017bfe778acSMika Westerberg int ret; 2018d6cc51cdSAndreas Noever 2019bfe778acSMika Westerberg tb->root_switch = tb_switch_alloc(tb, &tb->dev, 0); 2020444ac384SMika Westerberg if (IS_ERR(tb->root_switch)) 2021444ac384SMika Westerberg return PTR_ERR(tb->root_switch); 2022a25c8b2fSAndreas Noever 2023e6b245ccSMika Westerberg /* 2024e6b245ccSMika Westerberg * ICM firmware upgrade needs running firmware and in native 2025e6b245ccSMika Westerberg * mode that is not available so disable firmware upgrade of the 2026e6b245ccSMika Westerberg * root switch. 20275172eb9aSSzuying Chen * 20285172eb9aSSzuying Chen * However, USB4 routers support NVM firmware upgrade if they 20295172eb9aSSzuying Chen * implement the necessary router operations. 2030e6b245ccSMika Westerberg */ 20315172eb9aSSzuying Chen tb->root_switch->no_nvm_upgrade = !tb_switch_is_usb4(tb->root_switch); 20326ac6faeeSMika Westerberg /* All USB4 routers support runtime PM */ 20336ac6faeeSMika Westerberg tb->root_switch->rpm = tb_switch_is_usb4(tb->root_switch); 2034e6b245ccSMika Westerberg 2035bfe778acSMika Westerberg ret = tb_switch_configure(tb->root_switch); 2036bfe778acSMika Westerberg if (ret) { 2037bfe778acSMika Westerberg tb_switch_put(tb->root_switch); 2038bfe778acSMika Westerberg return ret; 2039bfe778acSMika Westerberg } 2040bfe778acSMika Westerberg 2041bfe778acSMika Westerberg /* Announce the switch to the world */ 2042bfe778acSMika Westerberg ret = tb_switch_add(tb->root_switch); 2043bfe778acSMika Westerberg if (ret) { 2044bfe778acSMika Westerberg tb_switch_put(tb->root_switch); 2045bfe778acSMika Westerberg return ret; 2046bfe778acSMika Westerberg } 2047bfe778acSMika Westerberg 2048b017a46dSGil Fine /* 2049b017a46dSGil Fine * To support highest CLx state, we set host router's TMU to 2050b017a46dSGil Fine * Normal mode. 2051b017a46dSGil Fine */ 2052b017a46dSGil Fine tb_switch_tmu_configure(tb->root_switch, TB_SWITCH_TMU_RATE_NORMAL, 2053b017a46dSGil Fine false); 2054cf29b9afSRajmohan Mani /* Enable TMU if it is off */ 2055cf29b9afSRajmohan Mani tb_switch_tmu_enable(tb->root_switch); 20569da672a4SAndreas Noever /* Full scan to discover devices added before the driver was loaded. */ 20579da672a4SAndreas Noever tb_scan_switch(tb->root_switch); 20580414bec5SMika Westerberg /* Find out tunnels created by the boot firmware */ 205943bddb26SMika Westerberg tb_discover_tunnels(tb); 2060b60e31bfSSanjay R Mehta /* Add DP resources from the DP tunnels created by the boot firmware */ 2061b60e31bfSSanjay R Mehta tb_discover_dp_resources(tb); 2062e6f81858SRajmohan Mani /* 2063e6f81858SRajmohan Mani * If the boot firmware did not create USB 3.x tunnels create them 2064e6f81858SRajmohan Mani * now for the whole topology. 2065e6f81858SRajmohan Mani */ 2066e6f81858SRajmohan Mani tb_create_usb3_tunnels(tb->root_switch); 20678afe909bSMika Westerberg /* Add DP IN resources for the root switch */ 20688afe909bSMika Westerberg tb_add_dp_resources(tb->root_switch); 206999cabbb0SMika Westerberg /* Make the discovered switches available to the userspace */ 207099cabbb0SMika Westerberg device_for_each_child(&tb->root_switch->dev, NULL, 207199cabbb0SMika Westerberg tb_scan_finalize_switch); 20729da672a4SAndreas Noever 2073d6cc51cdSAndreas Noever /* Allow tb_handle_hotplug to progress events */ 20749d3cce0bSMika Westerberg tcm->hotplug_active = true; 20759d3cce0bSMika Westerberg return 0; 2076d6cc51cdSAndreas Noever } 2077d6cc51cdSAndreas Noever 20789d3cce0bSMika Westerberg static int tb_suspend_noirq(struct tb *tb) 207923dd5bb4SAndreas Noever { 20809d3cce0bSMika Westerberg struct tb_cm *tcm = tb_priv(tb); 20819d3cce0bSMika Westerberg 2082daa5140fSMika Westerberg tb_dbg(tb, "suspending...\n"); 208381a2e3e4SMika Westerberg tb_disconnect_and_release_dp(tb); 20846ac6faeeSMika Westerberg tb_switch_suspend(tb->root_switch, false); 20859d3cce0bSMika Westerberg tcm->hotplug_active = false; /* signal tb_handle_hotplug to quit */ 2086daa5140fSMika Westerberg tb_dbg(tb, "suspend finished\n"); 20879d3cce0bSMika Westerberg 20889d3cce0bSMika Westerberg return 0; 208923dd5bb4SAndreas Noever } 209023dd5bb4SAndreas Noever 209191c0c120SMika Westerberg static void tb_restore_children(struct tb_switch *sw) 209291c0c120SMika Westerberg { 209391c0c120SMika Westerberg struct tb_port *port; 209491c0c120SMika Westerberg 20956ac6faeeSMika Westerberg /* No need to restore if the router is already unplugged */ 20966ac6faeeSMika Westerberg if (sw->is_unplugged) 20976ac6faeeSMika Westerberg return; 20986ac6faeeSMika Westerberg 20991a9b6cb8SMika Westerberg if (tb_enable_clx(sw)) 21001a9b6cb8SMika Westerberg tb_sw_warn(sw, "failed to re-enable CL states\n"); 2101b017a46dSGil Fine 2102cf29b9afSRajmohan Mani if (tb_enable_tmu(sw)) 2103cf29b9afSRajmohan Mani tb_sw_warn(sw, "failed to restore TMU configuration\n"); 2104cf29b9afSRajmohan Mani 210591c0c120SMika Westerberg tb_switch_for_each_port(sw, port) { 2106284652a4SMika Westerberg if (!tb_port_has_remote(port) && !port->xdomain) 210791c0c120SMika Westerberg continue; 210891c0c120SMika Westerberg 2109284652a4SMika Westerberg if (port->remote) { 21102ca3263aSMika Westerberg tb_switch_lane_bonding_enable(port->remote->sw); 2111de462039SMika Westerberg tb_switch_configure_link(port->remote->sw); 211291c0c120SMika Westerberg 211391c0c120SMika Westerberg tb_restore_children(port->remote->sw); 2114284652a4SMika Westerberg } else if (port->xdomain) { 2115f9cad07bSMika Westerberg tb_port_configure_xdomain(port, port->xdomain); 2116284652a4SMika Westerberg } 211791c0c120SMika Westerberg } 211891c0c120SMika Westerberg } 211991c0c120SMika Westerberg 21209d3cce0bSMika Westerberg static int tb_resume_noirq(struct tb *tb) 212123dd5bb4SAndreas Noever { 21229d3cce0bSMika Westerberg struct tb_cm *tcm = tb_priv(tb); 212393f36adeSMika Westerberg struct tb_tunnel *tunnel, *n; 212443bddb26SMika Westerberg unsigned int usb3_delay = 0; 212543bddb26SMika Westerberg LIST_HEAD(tunnels); 21269d3cce0bSMika Westerberg 2127daa5140fSMika Westerberg tb_dbg(tb, "resuming...\n"); 212823dd5bb4SAndreas Noever 212923dd5bb4SAndreas Noever /* remove any pci devices the firmware might have setup */ 2130356b6c4eSMika Westerberg tb_switch_reset(tb->root_switch); 213123dd5bb4SAndreas Noever 213223dd5bb4SAndreas Noever tb_switch_resume(tb->root_switch); 213323dd5bb4SAndreas Noever tb_free_invalid_tunnels(tb); 213423dd5bb4SAndreas Noever tb_free_unplugged_children(tb->root_switch); 213591c0c120SMika Westerberg tb_restore_children(tb->root_switch); 213643bddb26SMika Westerberg 213743bddb26SMika Westerberg /* 213843bddb26SMika Westerberg * If we get here from suspend to disk the boot firmware or the 213943bddb26SMika Westerberg * restore kernel might have created tunnels of its own. Since 214043bddb26SMika Westerberg * we cannot be sure they are usable for us we find and tear 214143bddb26SMika Westerberg * them down. 214243bddb26SMika Westerberg */ 214343bddb26SMika Westerberg tb_switch_discover_tunnels(tb->root_switch, &tunnels, false); 214443bddb26SMika Westerberg list_for_each_entry_safe_reverse(tunnel, n, &tunnels, list) { 214543bddb26SMika Westerberg if (tb_tunnel_is_usb3(tunnel)) 214643bddb26SMika Westerberg usb3_delay = 500; 214743bddb26SMika Westerberg tb_tunnel_deactivate(tunnel); 214843bddb26SMika Westerberg tb_tunnel_free(tunnel); 214943bddb26SMika Westerberg } 215043bddb26SMika Westerberg 215143bddb26SMika Westerberg /* Re-create our tunnels now */ 215243bddb26SMika Westerberg list_for_each_entry_safe(tunnel, n, &tcm->tunnel_list, list) { 215343bddb26SMika Westerberg /* USB3 requires delay before it can be re-activated */ 215443bddb26SMika Westerberg if (tb_tunnel_is_usb3(tunnel)) { 215543bddb26SMika Westerberg msleep(usb3_delay); 215643bddb26SMika Westerberg /* Only need to do it once */ 215743bddb26SMika Westerberg usb3_delay = 0; 215843bddb26SMika Westerberg } 215993f36adeSMika Westerberg tb_tunnel_restart(tunnel); 216043bddb26SMika Westerberg } 21619d3cce0bSMika Westerberg if (!list_empty(&tcm->tunnel_list)) { 216223dd5bb4SAndreas Noever /* 216323dd5bb4SAndreas Noever * the pcie links need some time to get going. 216423dd5bb4SAndreas Noever * 100ms works for me... 216523dd5bb4SAndreas Noever */ 2166daa5140fSMika Westerberg tb_dbg(tb, "tunnels restarted, sleeping for 100ms\n"); 216723dd5bb4SAndreas Noever msleep(100); 216823dd5bb4SAndreas Noever } 216923dd5bb4SAndreas Noever /* Allow tb_handle_hotplug to progress events */ 21709d3cce0bSMika Westerberg tcm->hotplug_active = true; 2171daa5140fSMika Westerberg tb_dbg(tb, "resume finished\n"); 21729d3cce0bSMika Westerberg 21739d3cce0bSMika Westerberg return 0; 21749d3cce0bSMika Westerberg } 21759d3cce0bSMika Westerberg 21767ea4cd6bSMika Westerberg static int tb_free_unplugged_xdomains(struct tb_switch *sw) 21777ea4cd6bSMika Westerberg { 2178b433d010SMika Westerberg struct tb_port *port; 2179b433d010SMika Westerberg int ret = 0; 21807ea4cd6bSMika Westerberg 2181b433d010SMika Westerberg tb_switch_for_each_port(sw, port) { 21827ea4cd6bSMika Westerberg if (tb_is_upstream_port(port)) 21837ea4cd6bSMika Westerberg continue; 21847ea4cd6bSMika Westerberg if (port->xdomain && port->xdomain->is_unplugged) { 2185dacb1287SKranthi Kuntala tb_retimer_remove_all(port); 21867ea4cd6bSMika Westerberg tb_xdomain_remove(port->xdomain); 2187284652a4SMika Westerberg tb_port_unconfigure_xdomain(port); 21887ea4cd6bSMika Westerberg port->xdomain = NULL; 21897ea4cd6bSMika Westerberg ret++; 21907ea4cd6bSMika Westerberg } else if (port->remote) { 21917ea4cd6bSMika Westerberg ret += tb_free_unplugged_xdomains(port->remote->sw); 21927ea4cd6bSMika Westerberg } 21937ea4cd6bSMika Westerberg } 21947ea4cd6bSMika Westerberg 21957ea4cd6bSMika Westerberg return ret; 21967ea4cd6bSMika Westerberg } 21977ea4cd6bSMika Westerberg 2198884e4d57SMika Westerberg static int tb_freeze_noirq(struct tb *tb) 2199884e4d57SMika Westerberg { 2200884e4d57SMika Westerberg struct tb_cm *tcm = tb_priv(tb); 2201884e4d57SMika Westerberg 2202884e4d57SMika Westerberg tcm->hotplug_active = false; 2203884e4d57SMika Westerberg return 0; 2204884e4d57SMika Westerberg } 2205884e4d57SMika Westerberg 2206884e4d57SMika Westerberg static int tb_thaw_noirq(struct tb *tb) 2207884e4d57SMika Westerberg { 2208884e4d57SMika Westerberg struct tb_cm *tcm = tb_priv(tb); 2209884e4d57SMika Westerberg 2210884e4d57SMika Westerberg tcm->hotplug_active = true; 2211884e4d57SMika Westerberg return 0; 2212884e4d57SMika Westerberg } 2213884e4d57SMika Westerberg 22147ea4cd6bSMika Westerberg static void tb_complete(struct tb *tb) 22157ea4cd6bSMika Westerberg { 22167ea4cd6bSMika Westerberg /* 22177ea4cd6bSMika Westerberg * Release any unplugged XDomains and if there is a case where 22187ea4cd6bSMika Westerberg * another domain is swapped in place of unplugged XDomain we 22197ea4cd6bSMika Westerberg * need to run another rescan. 22207ea4cd6bSMika Westerberg */ 22217ea4cd6bSMika Westerberg mutex_lock(&tb->lock); 22227ea4cd6bSMika Westerberg if (tb_free_unplugged_xdomains(tb->root_switch)) 22237ea4cd6bSMika Westerberg tb_scan_switch(tb->root_switch); 22247ea4cd6bSMika Westerberg mutex_unlock(&tb->lock); 22257ea4cd6bSMika Westerberg } 22267ea4cd6bSMika Westerberg 22276ac6faeeSMika Westerberg static int tb_runtime_suspend(struct tb *tb) 22286ac6faeeSMika Westerberg { 22296ac6faeeSMika Westerberg struct tb_cm *tcm = tb_priv(tb); 22306ac6faeeSMika Westerberg 22316ac6faeeSMika Westerberg mutex_lock(&tb->lock); 22326ac6faeeSMika Westerberg tb_switch_suspend(tb->root_switch, true); 22336ac6faeeSMika Westerberg tcm->hotplug_active = false; 22346ac6faeeSMika Westerberg mutex_unlock(&tb->lock); 22356ac6faeeSMika Westerberg 22366ac6faeeSMika Westerberg return 0; 22376ac6faeeSMika Westerberg } 22386ac6faeeSMika Westerberg 22396ac6faeeSMika Westerberg static void tb_remove_work(struct work_struct *work) 22406ac6faeeSMika Westerberg { 22416ac6faeeSMika Westerberg struct tb_cm *tcm = container_of(work, struct tb_cm, remove_work.work); 22426ac6faeeSMika Westerberg struct tb *tb = tcm_to_tb(tcm); 22436ac6faeeSMika Westerberg 22446ac6faeeSMika Westerberg mutex_lock(&tb->lock); 22456ac6faeeSMika Westerberg if (tb->root_switch) { 22466ac6faeeSMika Westerberg tb_free_unplugged_children(tb->root_switch); 22476ac6faeeSMika Westerberg tb_free_unplugged_xdomains(tb->root_switch); 22486ac6faeeSMika Westerberg } 22496ac6faeeSMika Westerberg mutex_unlock(&tb->lock); 22506ac6faeeSMika Westerberg } 22516ac6faeeSMika Westerberg 22526ac6faeeSMika Westerberg static int tb_runtime_resume(struct tb *tb) 22536ac6faeeSMika Westerberg { 22546ac6faeeSMika Westerberg struct tb_cm *tcm = tb_priv(tb); 22556ac6faeeSMika Westerberg struct tb_tunnel *tunnel, *n; 22566ac6faeeSMika Westerberg 22576ac6faeeSMika Westerberg mutex_lock(&tb->lock); 22586ac6faeeSMika Westerberg tb_switch_resume(tb->root_switch); 22596ac6faeeSMika Westerberg tb_free_invalid_tunnels(tb); 22606ac6faeeSMika Westerberg tb_restore_children(tb->root_switch); 22616ac6faeeSMika Westerberg list_for_each_entry_safe(tunnel, n, &tcm->tunnel_list, list) 22626ac6faeeSMika Westerberg tb_tunnel_restart(tunnel); 22636ac6faeeSMika Westerberg tcm->hotplug_active = true; 22646ac6faeeSMika Westerberg mutex_unlock(&tb->lock); 22656ac6faeeSMika Westerberg 22666ac6faeeSMika Westerberg /* 22676ac6faeeSMika Westerberg * Schedule cleanup of any unplugged devices. Run this in a 22686ac6faeeSMika Westerberg * separate thread to avoid possible deadlock if the device 22696ac6faeeSMika Westerberg * removal runtime resumes the unplugged device. 22706ac6faeeSMika Westerberg */ 22716ac6faeeSMika Westerberg queue_delayed_work(tb->wq, &tcm->remove_work, msecs_to_jiffies(50)); 22726ac6faeeSMika Westerberg return 0; 22736ac6faeeSMika Westerberg } 22746ac6faeeSMika Westerberg 22759d3cce0bSMika Westerberg static const struct tb_cm_ops tb_cm_ops = { 22769d3cce0bSMika Westerberg .start = tb_start, 22779d3cce0bSMika Westerberg .stop = tb_stop, 22789d3cce0bSMika Westerberg .suspend_noirq = tb_suspend_noirq, 22799d3cce0bSMika Westerberg .resume_noirq = tb_resume_noirq, 2280884e4d57SMika Westerberg .freeze_noirq = tb_freeze_noirq, 2281884e4d57SMika Westerberg .thaw_noirq = tb_thaw_noirq, 22827ea4cd6bSMika Westerberg .complete = tb_complete, 22836ac6faeeSMika Westerberg .runtime_suspend = tb_runtime_suspend, 22846ac6faeeSMika Westerberg .runtime_resume = tb_runtime_resume, 228581a54b5eSMika Westerberg .handle_event = tb_handle_event, 22863da88be2SMika Westerberg .disapprove_switch = tb_disconnect_pci, 228799cabbb0SMika Westerberg .approve_switch = tb_tunnel_pci, 22887ea4cd6bSMika Westerberg .approve_xdomain_paths = tb_approve_xdomain_paths, 22897ea4cd6bSMika Westerberg .disconnect_xdomain_paths = tb_disconnect_xdomain_paths, 22909d3cce0bSMika Westerberg }; 22919d3cce0bSMika Westerberg 2292349bfe08SMika Westerberg /* 2293349bfe08SMika Westerberg * During suspend the Thunderbolt controller is reset and all PCIe 2294349bfe08SMika Westerberg * tunnels are lost. The NHI driver will try to reestablish all tunnels 2295349bfe08SMika Westerberg * during resume. This adds device links between the tunneled PCIe 2296349bfe08SMika Westerberg * downstream ports and the NHI so that the device core will make sure 2297349bfe08SMika Westerberg * NHI is resumed first before the rest. 2298349bfe08SMika Westerberg */ 2299349bfe08SMika Westerberg static void tb_apple_add_links(struct tb_nhi *nhi) 2300349bfe08SMika Westerberg { 2301349bfe08SMika Westerberg struct pci_dev *upstream, *pdev; 2302349bfe08SMika Westerberg 2303349bfe08SMika Westerberg if (!x86_apple_machine) 2304349bfe08SMika Westerberg return; 2305349bfe08SMika Westerberg 2306349bfe08SMika Westerberg switch (nhi->pdev->device) { 2307349bfe08SMika Westerberg case PCI_DEVICE_ID_INTEL_LIGHT_RIDGE: 2308349bfe08SMika Westerberg case PCI_DEVICE_ID_INTEL_CACTUS_RIDGE_4C: 2309349bfe08SMika Westerberg case PCI_DEVICE_ID_INTEL_FALCON_RIDGE_2C_NHI: 2310349bfe08SMika Westerberg case PCI_DEVICE_ID_INTEL_FALCON_RIDGE_4C_NHI: 2311349bfe08SMika Westerberg break; 2312349bfe08SMika Westerberg default: 2313349bfe08SMika Westerberg return; 2314349bfe08SMika Westerberg } 2315349bfe08SMika Westerberg 2316349bfe08SMika Westerberg upstream = pci_upstream_bridge(nhi->pdev); 2317349bfe08SMika Westerberg while (upstream) { 2318349bfe08SMika Westerberg if (!pci_is_pcie(upstream)) 2319349bfe08SMika Westerberg return; 2320349bfe08SMika Westerberg if (pci_pcie_type(upstream) == PCI_EXP_TYPE_UPSTREAM) 2321349bfe08SMika Westerberg break; 2322349bfe08SMika Westerberg upstream = pci_upstream_bridge(upstream); 2323349bfe08SMika Westerberg } 2324349bfe08SMika Westerberg 2325349bfe08SMika Westerberg if (!upstream) 2326349bfe08SMika Westerberg return; 2327349bfe08SMika Westerberg 2328349bfe08SMika Westerberg /* 2329349bfe08SMika Westerberg * For each hotplug downstream port, create add device link 2330349bfe08SMika Westerberg * back to NHI so that PCIe tunnels can be re-established after 2331349bfe08SMika Westerberg * sleep. 2332349bfe08SMika Westerberg */ 2333349bfe08SMika Westerberg for_each_pci_bridge(pdev, upstream->subordinate) { 2334349bfe08SMika Westerberg const struct device_link *link; 2335349bfe08SMika Westerberg 2336349bfe08SMika Westerberg if (!pci_is_pcie(pdev)) 2337349bfe08SMika Westerberg continue; 2338349bfe08SMika Westerberg if (pci_pcie_type(pdev) != PCI_EXP_TYPE_DOWNSTREAM || 2339349bfe08SMika Westerberg !pdev->is_hotplug_bridge) 2340349bfe08SMika Westerberg continue; 2341349bfe08SMika Westerberg 2342349bfe08SMika Westerberg link = device_link_add(&pdev->dev, &nhi->pdev->dev, 2343349bfe08SMika Westerberg DL_FLAG_AUTOREMOVE_SUPPLIER | 2344349bfe08SMika Westerberg DL_FLAG_PM_RUNTIME); 2345349bfe08SMika Westerberg if (link) { 2346349bfe08SMika Westerberg dev_dbg(&nhi->pdev->dev, "created link from %s\n", 2347349bfe08SMika Westerberg dev_name(&pdev->dev)); 2348349bfe08SMika Westerberg } else { 2349349bfe08SMika Westerberg dev_warn(&nhi->pdev->dev, "device link creation from %s failed\n", 2350349bfe08SMika Westerberg dev_name(&pdev->dev)); 2351349bfe08SMika Westerberg } 2352349bfe08SMika Westerberg } 2353349bfe08SMika Westerberg } 2354349bfe08SMika Westerberg 23559d3cce0bSMika Westerberg struct tb *tb_probe(struct tb_nhi *nhi) 23569d3cce0bSMika Westerberg { 23579d3cce0bSMika Westerberg struct tb_cm *tcm; 23589d3cce0bSMika Westerberg struct tb *tb; 23599d3cce0bSMika Westerberg 23607f0a34d7SMika Westerberg tb = tb_domain_alloc(nhi, TB_TIMEOUT, sizeof(*tcm)); 23619d3cce0bSMika Westerberg if (!tb) 23629d3cce0bSMika Westerberg return NULL; 23639d3cce0bSMika Westerberg 2364c6da62a2SMika Westerberg if (tb_acpi_may_tunnel_pcie()) 236599cabbb0SMika Westerberg tb->security_level = TB_SECURITY_USER; 2366c6da62a2SMika Westerberg else 2367c6da62a2SMika Westerberg tb->security_level = TB_SECURITY_NOPCIE; 2368c6da62a2SMika Westerberg 23699d3cce0bSMika Westerberg tb->cm_ops = &tb_cm_ops; 23709d3cce0bSMika Westerberg 23719d3cce0bSMika Westerberg tcm = tb_priv(tb); 23729d3cce0bSMika Westerberg INIT_LIST_HEAD(&tcm->tunnel_list); 23738afe909bSMika Westerberg INIT_LIST_HEAD(&tcm->dp_resources); 23746ac6faeeSMika Westerberg INIT_DELAYED_WORK(&tcm->remove_work, tb_remove_work); 23756ce35635SMika Westerberg tb_init_bandwidth_groups(tcm); 23769d3cce0bSMika Westerberg 2377e0258805SMika Westerberg tb_dbg(tb, "using software connection manager\n"); 2378e0258805SMika Westerberg 2379349bfe08SMika Westerberg tb_apple_add_links(nhi); 2380349bfe08SMika Westerberg tb_acpi_add_links(nhi); 2381349bfe08SMika Westerberg 23829d3cce0bSMika Westerberg return tb; 238323dd5bb4SAndreas Noever } 2384