1d6cc51cdSAndreas Noever /* 2d6cc51cdSAndreas Noever * Thunderbolt Cactus Ridge driver - bus logic (NHI independent) 3d6cc51cdSAndreas Noever * 4d6cc51cdSAndreas Noever * Copyright (c) 2014 Andreas Noever <andreas.noever@gmail.com> 5d6cc51cdSAndreas Noever */ 6d6cc51cdSAndreas Noever 7d6cc51cdSAndreas Noever #include <linux/slab.h> 8d6cc51cdSAndreas Noever #include <linux/errno.h> 9d6cc51cdSAndreas Noever #include <linux/delay.h> 10d6cc51cdSAndreas Noever 11d6cc51cdSAndreas Noever #include "tb.h" 127adf6097SAndreas Noever #include "tb_regs.h" 133364f0c1SAndreas Noever #include "tunnel_pci.h" 14d6cc51cdSAndreas Noever 159d3cce0bSMika Westerberg /** 169d3cce0bSMika Westerberg * struct tb_cm - Simple Thunderbolt connection manager 179d3cce0bSMika Westerberg * @tunnel_list: List of active tunnels 189d3cce0bSMika Westerberg * @hotplug_active: tb_handle_hotplug will stop progressing plug 199d3cce0bSMika Westerberg * events and exit if this is not set (it needs to 209d3cce0bSMika Westerberg * acquire the lock one more time). Used to drain wq 219d3cce0bSMika Westerberg * after cfg has been paused. 229d3cce0bSMika Westerberg */ 239d3cce0bSMika Westerberg struct tb_cm { 249d3cce0bSMika Westerberg struct list_head tunnel_list; 259d3cce0bSMika Westerberg bool hotplug_active; 269d3cce0bSMika Westerberg }; 279da672a4SAndreas Noever 289da672a4SAndreas Noever /* enumeration & hot plug handling */ 299da672a4SAndreas Noever 309da672a4SAndreas Noever 319da672a4SAndreas Noever static void tb_scan_port(struct tb_port *port); 329da672a4SAndreas Noever 339da672a4SAndreas Noever /** 349da672a4SAndreas Noever * tb_scan_switch() - scan for and initialize downstream switches 359da672a4SAndreas Noever */ 369da672a4SAndreas Noever static void tb_scan_switch(struct tb_switch *sw) 379da672a4SAndreas Noever { 389da672a4SAndreas Noever int i; 399da672a4SAndreas Noever for (i = 1; i <= sw->config.max_port_number; i++) 409da672a4SAndreas Noever tb_scan_port(&sw->ports[i]); 419da672a4SAndreas Noever } 429da672a4SAndreas Noever 439da672a4SAndreas Noever /** 449da672a4SAndreas Noever * tb_scan_port() - check for and initialize switches below port 459da672a4SAndreas Noever */ 469da672a4SAndreas Noever static void tb_scan_port(struct tb_port *port) 479da672a4SAndreas Noever { 489da672a4SAndreas Noever struct tb_switch *sw; 499da672a4SAndreas Noever if (tb_is_upstream_port(port)) 509da672a4SAndreas Noever return; 519da672a4SAndreas Noever if (port->config.type != TB_TYPE_PORT) 529da672a4SAndreas Noever return; 53343fcb8cSAndreas Noever if (port->dual_link_port && port->link_nr) 54343fcb8cSAndreas Noever return; /* 55343fcb8cSAndreas Noever * Downstream switch is reachable through two ports. 56343fcb8cSAndreas Noever * Only scan on the primary port (link_nr == 0). 57343fcb8cSAndreas Noever */ 589da672a4SAndreas Noever if (tb_wait_for_port(port, false) <= 0) 599da672a4SAndreas Noever return; 609da672a4SAndreas Noever if (port->remote) { 619da672a4SAndreas Noever tb_port_WARN(port, "port already has a remote!\n"); 629da672a4SAndreas Noever return; 639da672a4SAndreas Noever } 649da672a4SAndreas Noever sw = tb_switch_alloc(port->sw->tb, tb_downstream_route(port)); 659da672a4SAndreas Noever if (!sw) 669da672a4SAndreas Noever return; 679da672a4SAndreas Noever port->remote = tb_upstream_port(sw); 689da672a4SAndreas Noever tb_upstream_port(sw)->remote = port; 699da672a4SAndreas Noever tb_scan_switch(sw); 709da672a4SAndreas Noever } 719da672a4SAndreas Noever 723364f0c1SAndreas Noever /** 733364f0c1SAndreas Noever * tb_free_invalid_tunnels() - destroy tunnels of devices that have gone away 743364f0c1SAndreas Noever */ 753364f0c1SAndreas Noever static void tb_free_invalid_tunnels(struct tb *tb) 763364f0c1SAndreas Noever { 779d3cce0bSMika Westerberg struct tb_cm *tcm = tb_priv(tb); 783364f0c1SAndreas Noever struct tb_pci_tunnel *tunnel; 793364f0c1SAndreas Noever struct tb_pci_tunnel *n; 809d3cce0bSMika Westerberg 819d3cce0bSMika Westerberg list_for_each_entry_safe(tunnel, n, &tcm->tunnel_list, list) { 823364f0c1SAndreas Noever if (tb_pci_is_invalid(tunnel)) { 833364f0c1SAndreas Noever tb_pci_deactivate(tunnel); 849d3cce0bSMika Westerberg list_del(&tunnel->list); 853364f0c1SAndreas Noever tb_pci_free(tunnel); 863364f0c1SAndreas Noever } 873364f0c1SAndreas Noever } 883364f0c1SAndreas Noever } 893364f0c1SAndreas Noever 903364f0c1SAndreas Noever /** 9123dd5bb4SAndreas Noever * tb_free_unplugged_children() - traverse hierarchy and free unplugged switches 9223dd5bb4SAndreas Noever */ 9323dd5bb4SAndreas Noever static void tb_free_unplugged_children(struct tb_switch *sw) 9423dd5bb4SAndreas Noever { 9523dd5bb4SAndreas Noever int i; 9623dd5bb4SAndreas Noever for (i = 1; i <= sw->config.max_port_number; i++) { 9723dd5bb4SAndreas Noever struct tb_port *port = &sw->ports[i]; 9823dd5bb4SAndreas Noever if (tb_is_upstream_port(port)) 9923dd5bb4SAndreas Noever continue; 10023dd5bb4SAndreas Noever if (!port->remote) 10123dd5bb4SAndreas Noever continue; 10223dd5bb4SAndreas Noever if (port->remote->sw->is_unplugged) { 10323dd5bb4SAndreas Noever tb_switch_free(port->remote->sw); 10423dd5bb4SAndreas Noever port->remote = NULL; 10523dd5bb4SAndreas Noever } else { 10623dd5bb4SAndreas Noever tb_free_unplugged_children(port->remote->sw); 10723dd5bb4SAndreas Noever } 10823dd5bb4SAndreas Noever } 10923dd5bb4SAndreas Noever } 11023dd5bb4SAndreas Noever 11123dd5bb4SAndreas Noever 11223dd5bb4SAndreas Noever /** 1133364f0c1SAndreas Noever * find_pci_up_port() - return the first PCIe up port on @sw or NULL 1143364f0c1SAndreas Noever */ 1153364f0c1SAndreas Noever static struct tb_port *tb_find_pci_up_port(struct tb_switch *sw) 1163364f0c1SAndreas Noever { 1173364f0c1SAndreas Noever int i; 1183364f0c1SAndreas Noever for (i = 1; i <= sw->config.max_port_number; i++) 1193364f0c1SAndreas Noever if (sw->ports[i].config.type == TB_TYPE_PCIE_UP) 1203364f0c1SAndreas Noever return &sw->ports[i]; 1213364f0c1SAndreas Noever return NULL; 1223364f0c1SAndreas Noever } 1233364f0c1SAndreas Noever 1243364f0c1SAndreas Noever /** 1253364f0c1SAndreas Noever * find_unused_down_port() - return the first inactive PCIe down port on @sw 1263364f0c1SAndreas Noever */ 1273364f0c1SAndreas Noever static struct tb_port *tb_find_unused_down_port(struct tb_switch *sw) 1283364f0c1SAndreas Noever { 1293364f0c1SAndreas Noever int i; 1303364f0c1SAndreas Noever int cap; 1313364f0c1SAndreas Noever int res; 1323364f0c1SAndreas Noever int data; 1333364f0c1SAndreas Noever for (i = 1; i <= sw->config.max_port_number; i++) { 1343364f0c1SAndreas Noever if (tb_is_upstream_port(&sw->ports[i])) 1353364f0c1SAndreas Noever continue; 1363364f0c1SAndreas Noever if (sw->ports[i].config.type != TB_TYPE_PCIE_DOWN) 1373364f0c1SAndreas Noever continue; 138da2da04bSMika Westerberg cap = tb_port_find_cap(&sw->ports[i], TB_PORT_CAP_ADAP); 139da2da04bSMika Westerberg if (cap < 0) 1403364f0c1SAndreas Noever continue; 1413364f0c1SAndreas Noever res = tb_port_read(&sw->ports[i], &data, TB_CFG_PORT, cap, 1); 1423364f0c1SAndreas Noever if (res < 0) 1433364f0c1SAndreas Noever continue; 1443364f0c1SAndreas Noever if (data & 0x80000000) 1453364f0c1SAndreas Noever continue; 1463364f0c1SAndreas Noever return &sw->ports[i]; 1473364f0c1SAndreas Noever } 1483364f0c1SAndreas Noever return NULL; 1493364f0c1SAndreas Noever } 1503364f0c1SAndreas Noever 1513364f0c1SAndreas Noever /** 1523364f0c1SAndreas Noever * tb_activate_pcie_devices() - scan for and activate PCIe devices 1533364f0c1SAndreas Noever * 1543364f0c1SAndreas Noever * This method is somewhat ad hoc. For now it only supports one device 1553364f0c1SAndreas Noever * per port and only devices at depth 1. 1563364f0c1SAndreas Noever */ 1573364f0c1SAndreas Noever static void tb_activate_pcie_devices(struct tb *tb) 1583364f0c1SAndreas Noever { 1593364f0c1SAndreas Noever int i; 1603364f0c1SAndreas Noever int cap; 1613364f0c1SAndreas Noever u32 data; 1623364f0c1SAndreas Noever struct tb_switch *sw; 1633364f0c1SAndreas Noever struct tb_port *up_port; 1643364f0c1SAndreas Noever struct tb_port *down_port; 1653364f0c1SAndreas Noever struct tb_pci_tunnel *tunnel; 1669d3cce0bSMika Westerberg struct tb_cm *tcm = tb_priv(tb); 1679d3cce0bSMika Westerberg 1683364f0c1SAndreas Noever /* scan for pcie devices at depth 1*/ 1693364f0c1SAndreas Noever for (i = 1; i <= tb->root_switch->config.max_port_number; i++) { 1703364f0c1SAndreas Noever if (tb_is_upstream_port(&tb->root_switch->ports[i])) 1713364f0c1SAndreas Noever continue; 1723364f0c1SAndreas Noever if (tb->root_switch->ports[i].config.type != TB_TYPE_PORT) 1733364f0c1SAndreas Noever continue; 1743364f0c1SAndreas Noever if (!tb->root_switch->ports[i].remote) 1753364f0c1SAndreas Noever continue; 1763364f0c1SAndreas Noever sw = tb->root_switch->ports[i].remote->sw; 1773364f0c1SAndreas Noever up_port = tb_find_pci_up_port(sw); 1783364f0c1SAndreas Noever if (!up_port) { 1793364f0c1SAndreas Noever tb_sw_info(sw, "no PCIe devices found, aborting\n"); 1803364f0c1SAndreas Noever continue; 1813364f0c1SAndreas Noever } 1823364f0c1SAndreas Noever 1833364f0c1SAndreas Noever /* check whether port is already activated */ 184da2da04bSMika Westerberg cap = tb_port_find_cap(up_port, TB_PORT_CAP_ADAP); 185da2da04bSMika Westerberg if (cap < 0) 1863364f0c1SAndreas Noever continue; 1873364f0c1SAndreas Noever if (tb_port_read(up_port, &data, TB_CFG_PORT, cap, 1)) 1883364f0c1SAndreas Noever continue; 1893364f0c1SAndreas Noever if (data & 0x80000000) { 1903364f0c1SAndreas Noever tb_port_info(up_port, 1913364f0c1SAndreas Noever "PCIe port already activated, aborting\n"); 1923364f0c1SAndreas Noever continue; 1933364f0c1SAndreas Noever } 1943364f0c1SAndreas Noever 1953364f0c1SAndreas Noever down_port = tb_find_unused_down_port(tb->root_switch); 1963364f0c1SAndreas Noever if (!down_port) { 1973364f0c1SAndreas Noever tb_port_info(up_port, 1983364f0c1SAndreas Noever "All PCIe down ports are occupied, aborting\n"); 1993364f0c1SAndreas Noever continue; 2003364f0c1SAndreas Noever } 2013364f0c1SAndreas Noever tunnel = tb_pci_alloc(tb, up_port, down_port); 2023364f0c1SAndreas Noever if (!tunnel) { 2033364f0c1SAndreas Noever tb_port_info(up_port, 2043364f0c1SAndreas Noever "PCIe tunnel allocation failed, aborting\n"); 2053364f0c1SAndreas Noever continue; 2063364f0c1SAndreas Noever } 2073364f0c1SAndreas Noever 2083364f0c1SAndreas Noever if (tb_pci_activate(tunnel)) { 2093364f0c1SAndreas Noever tb_port_info(up_port, 2103364f0c1SAndreas Noever "PCIe tunnel activation failed, aborting\n"); 2113364f0c1SAndreas Noever tb_pci_free(tunnel); 2123364f0c1SAndreas Noever } 2133364f0c1SAndreas Noever 2149d3cce0bSMika Westerberg list_add(&tunnel->list, &tcm->tunnel_list); 2153364f0c1SAndreas Noever } 2163364f0c1SAndreas Noever } 2179da672a4SAndreas Noever 218d6cc51cdSAndreas Noever /* hotplug handling */ 219d6cc51cdSAndreas Noever 220d6cc51cdSAndreas Noever struct tb_hotplug_event { 221d6cc51cdSAndreas Noever struct work_struct work; 222d6cc51cdSAndreas Noever struct tb *tb; 223d6cc51cdSAndreas Noever u64 route; 224d6cc51cdSAndreas Noever u8 port; 225d6cc51cdSAndreas Noever bool unplug; 226d6cc51cdSAndreas Noever }; 227d6cc51cdSAndreas Noever 228d6cc51cdSAndreas Noever /** 229d6cc51cdSAndreas Noever * tb_handle_hotplug() - handle hotplug event 230d6cc51cdSAndreas Noever * 231d6cc51cdSAndreas Noever * Executes on tb->wq. 232d6cc51cdSAndreas Noever */ 233d6cc51cdSAndreas Noever static void tb_handle_hotplug(struct work_struct *work) 234d6cc51cdSAndreas Noever { 235d6cc51cdSAndreas Noever struct tb_hotplug_event *ev = container_of(work, typeof(*ev), work); 236d6cc51cdSAndreas Noever struct tb *tb = ev->tb; 2379d3cce0bSMika Westerberg struct tb_cm *tcm = tb_priv(tb); 238053596d9SAndreas Noever struct tb_switch *sw; 239053596d9SAndreas Noever struct tb_port *port; 240d6cc51cdSAndreas Noever mutex_lock(&tb->lock); 2419d3cce0bSMika Westerberg if (!tcm->hotplug_active) 242d6cc51cdSAndreas Noever goto out; /* during init, suspend or shutdown */ 243d6cc51cdSAndreas Noever 244053596d9SAndreas Noever sw = get_switch_at_route(tb->root_switch, ev->route); 245053596d9SAndreas Noever if (!sw) { 246053596d9SAndreas Noever tb_warn(tb, 247053596d9SAndreas Noever "hotplug event from non existent switch %llx:%x (unplug: %d)\n", 248053596d9SAndreas Noever ev->route, ev->port, ev->unplug); 249053596d9SAndreas Noever goto out; 250053596d9SAndreas Noever } 251053596d9SAndreas Noever if (ev->port > sw->config.max_port_number) { 252053596d9SAndreas Noever tb_warn(tb, 253053596d9SAndreas Noever "hotplug event from non existent port %llx:%x (unplug: %d)\n", 254053596d9SAndreas Noever ev->route, ev->port, ev->unplug); 255053596d9SAndreas Noever goto out; 256053596d9SAndreas Noever } 257053596d9SAndreas Noever port = &sw->ports[ev->port]; 258053596d9SAndreas Noever if (tb_is_upstream_port(port)) { 259053596d9SAndreas Noever tb_warn(tb, 260053596d9SAndreas Noever "hotplug event for upstream port %llx:%x (unplug: %d)\n", 261053596d9SAndreas Noever ev->route, ev->port, ev->unplug); 262053596d9SAndreas Noever goto out; 263053596d9SAndreas Noever } 264053596d9SAndreas Noever if (ev->unplug) { 265053596d9SAndreas Noever if (port->remote) { 266053596d9SAndreas Noever tb_port_info(port, "unplugged\n"); 267aae20bb6SLukas Wunner tb_sw_set_unplugged(port->remote->sw); 2683364f0c1SAndreas Noever tb_free_invalid_tunnels(tb); 269053596d9SAndreas Noever tb_switch_free(port->remote->sw); 270053596d9SAndreas Noever port->remote = NULL; 271053596d9SAndreas Noever } else { 272053596d9SAndreas Noever tb_port_info(port, 273053596d9SAndreas Noever "got unplug event for disconnected port, ignoring\n"); 274053596d9SAndreas Noever } 275053596d9SAndreas Noever } else if (port->remote) { 276053596d9SAndreas Noever tb_port_info(port, 277053596d9SAndreas Noever "got plug event for connected port, ignoring\n"); 278053596d9SAndreas Noever } else { 279053596d9SAndreas Noever tb_port_info(port, "hotplug: scanning\n"); 280053596d9SAndreas Noever tb_scan_port(port); 281053596d9SAndreas Noever if (!port->remote) { 282053596d9SAndreas Noever tb_port_info(port, "hotplug: no switch found\n"); 283053596d9SAndreas Noever } else if (port->remote->sw->config.depth > 1) { 284053596d9SAndreas Noever tb_sw_warn(port->remote->sw, 285053596d9SAndreas Noever "hotplug: chaining not supported\n"); 2863364f0c1SAndreas Noever } else { 2873364f0c1SAndreas Noever tb_sw_info(port->remote->sw, 2883364f0c1SAndreas Noever "hotplug: activating pcie devices\n"); 2893364f0c1SAndreas Noever tb_activate_pcie_devices(tb); 290053596d9SAndreas Noever } 291053596d9SAndreas Noever } 292d6cc51cdSAndreas Noever out: 293d6cc51cdSAndreas Noever mutex_unlock(&tb->lock); 294d6cc51cdSAndreas Noever kfree(ev); 295d6cc51cdSAndreas Noever } 296d6cc51cdSAndreas Noever 297d6cc51cdSAndreas Noever /** 298d6cc51cdSAndreas Noever * tb_schedule_hotplug_handler() - callback function for the control channel 299d6cc51cdSAndreas Noever * 300d6cc51cdSAndreas Noever * Delegates to tb_handle_hotplug. 301d6cc51cdSAndreas Noever */ 302d6cc51cdSAndreas Noever static void tb_schedule_hotplug_handler(void *data, u64 route, u8 port, 303d6cc51cdSAndreas Noever bool unplug) 304d6cc51cdSAndreas Noever { 305d6cc51cdSAndreas Noever struct tb *tb = data; 306d6cc51cdSAndreas Noever struct tb_hotplug_event *ev = kmalloc(sizeof(*ev), GFP_KERNEL); 307d6cc51cdSAndreas Noever if (!ev) 308d6cc51cdSAndreas Noever return; 309d6cc51cdSAndreas Noever INIT_WORK(&ev->work, tb_handle_hotplug); 310d6cc51cdSAndreas Noever ev->tb = tb; 311d6cc51cdSAndreas Noever ev->route = route; 312d6cc51cdSAndreas Noever ev->port = port; 313d6cc51cdSAndreas Noever ev->unplug = unplug; 314d6cc51cdSAndreas Noever queue_work(tb->wq, &ev->work); 315d6cc51cdSAndreas Noever } 316d6cc51cdSAndreas Noever 3179d3cce0bSMika Westerberg static void tb_stop(struct tb *tb) 318d6cc51cdSAndreas Noever { 3199d3cce0bSMika Westerberg struct tb_cm *tcm = tb_priv(tb); 3203364f0c1SAndreas Noever struct tb_pci_tunnel *tunnel; 3213364f0c1SAndreas Noever struct tb_pci_tunnel *n; 3223364f0c1SAndreas Noever 3233364f0c1SAndreas Noever /* tunnels are only present after everything has been initialized */ 3249d3cce0bSMika Westerberg list_for_each_entry_safe(tunnel, n, &tcm->tunnel_list, list) { 3253364f0c1SAndreas Noever tb_pci_deactivate(tunnel); 3263364f0c1SAndreas Noever tb_pci_free(tunnel); 3273364f0c1SAndreas Noever } 3283364f0c1SAndreas Noever 329a25c8b2fSAndreas Noever if (tb->root_switch) 330a25c8b2fSAndreas Noever tb_switch_free(tb->root_switch); 331a25c8b2fSAndreas Noever tb->root_switch = NULL; 332a25c8b2fSAndreas Noever 3339d3cce0bSMika Westerberg tcm->hotplug_active = false; /* signal tb_handle_hotplug to quit */ 334d6cc51cdSAndreas Noever } 335d6cc51cdSAndreas Noever 3369d3cce0bSMika Westerberg static int tb_start(struct tb *tb) 337d6cc51cdSAndreas Noever { 3389d3cce0bSMika Westerberg struct tb_cm *tcm = tb_priv(tb); 339d6cc51cdSAndreas Noever 340a25c8b2fSAndreas Noever tb->root_switch = tb_switch_alloc(tb, 0); 341a25c8b2fSAndreas Noever if (!tb->root_switch) 3429d3cce0bSMika Westerberg return -ENOMEM; 343a25c8b2fSAndreas Noever 3449da672a4SAndreas Noever /* Full scan to discover devices added before the driver was loaded. */ 3459da672a4SAndreas Noever tb_scan_switch(tb->root_switch); 3463364f0c1SAndreas Noever tb_activate_pcie_devices(tb); 3479da672a4SAndreas Noever 348d6cc51cdSAndreas Noever /* Allow tb_handle_hotplug to progress events */ 3499d3cce0bSMika Westerberg tcm->hotplug_active = true; 3509d3cce0bSMika Westerberg return 0; 351d6cc51cdSAndreas Noever } 352d6cc51cdSAndreas Noever 3539d3cce0bSMika Westerberg static int tb_suspend_noirq(struct tb *tb) 35423dd5bb4SAndreas Noever { 3559d3cce0bSMika Westerberg struct tb_cm *tcm = tb_priv(tb); 3569d3cce0bSMika Westerberg 35723dd5bb4SAndreas Noever tb_info(tb, "suspending...\n"); 35823dd5bb4SAndreas Noever tb_switch_suspend(tb->root_switch); 3599d3cce0bSMika Westerberg tcm->hotplug_active = false; /* signal tb_handle_hotplug to quit */ 36023dd5bb4SAndreas Noever tb_info(tb, "suspend finished\n"); 3619d3cce0bSMika Westerberg 3629d3cce0bSMika Westerberg return 0; 36323dd5bb4SAndreas Noever } 36423dd5bb4SAndreas Noever 3659d3cce0bSMika Westerberg static int tb_resume_noirq(struct tb *tb) 36623dd5bb4SAndreas Noever { 3679d3cce0bSMika Westerberg struct tb_cm *tcm = tb_priv(tb); 36823dd5bb4SAndreas Noever struct tb_pci_tunnel *tunnel, *n; 3699d3cce0bSMika Westerberg 37023dd5bb4SAndreas Noever tb_info(tb, "resuming...\n"); 37123dd5bb4SAndreas Noever 37223dd5bb4SAndreas Noever /* remove any pci devices the firmware might have setup */ 37323dd5bb4SAndreas Noever tb_switch_reset(tb, 0); 37423dd5bb4SAndreas Noever 37523dd5bb4SAndreas Noever tb_switch_resume(tb->root_switch); 37623dd5bb4SAndreas Noever tb_free_invalid_tunnels(tb); 37723dd5bb4SAndreas Noever tb_free_unplugged_children(tb->root_switch); 3789d3cce0bSMika Westerberg list_for_each_entry_safe(tunnel, n, &tcm->tunnel_list, list) 37923dd5bb4SAndreas Noever tb_pci_restart(tunnel); 3809d3cce0bSMika Westerberg if (!list_empty(&tcm->tunnel_list)) { 38123dd5bb4SAndreas Noever /* 38223dd5bb4SAndreas Noever * the pcie links need some time to get going. 38323dd5bb4SAndreas Noever * 100ms works for me... 38423dd5bb4SAndreas Noever */ 38523dd5bb4SAndreas Noever tb_info(tb, "tunnels restarted, sleeping for 100ms\n"); 38623dd5bb4SAndreas Noever msleep(100); 38723dd5bb4SAndreas Noever } 38823dd5bb4SAndreas Noever /* Allow tb_handle_hotplug to progress events */ 3899d3cce0bSMika Westerberg tcm->hotplug_active = true; 39023dd5bb4SAndreas Noever tb_info(tb, "resume finished\n"); 3919d3cce0bSMika Westerberg 3929d3cce0bSMika Westerberg return 0; 3939d3cce0bSMika Westerberg } 3949d3cce0bSMika Westerberg 3959d3cce0bSMika Westerberg static const struct tb_cm_ops tb_cm_ops = { 3969d3cce0bSMika Westerberg .start = tb_start, 3979d3cce0bSMika Westerberg .stop = tb_stop, 3989d3cce0bSMika Westerberg .suspend_noirq = tb_suspend_noirq, 3999d3cce0bSMika Westerberg .resume_noirq = tb_resume_noirq, 4009d3cce0bSMika Westerberg .hotplug = tb_schedule_hotplug_handler, 4019d3cce0bSMika Westerberg }; 4029d3cce0bSMika Westerberg 4039d3cce0bSMika Westerberg struct tb *tb_probe(struct tb_nhi *nhi) 4049d3cce0bSMika Westerberg { 4059d3cce0bSMika Westerberg struct tb_cm *tcm; 4069d3cce0bSMika Westerberg struct tb *tb; 4079d3cce0bSMika Westerberg 4089d3cce0bSMika Westerberg tb = tb_domain_alloc(nhi, sizeof(*tcm)); 4099d3cce0bSMika Westerberg if (!tb) 4109d3cce0bSMika Westerberg return NULL; 4119d3cce0bSMika Westerberg 4129d3cce0bSMika Westerberg tb->cm_ops = &tb_cm_ops; 4139d3cce0bSMika Westerberg 4149d3cce0bSMika Westerberg tcm = tb_priv(tb); 4159d3cce0bSMika Westerberg INIT_LIST_HEAD(&tcm->tunnel_list); 4169d3cce0bSMika Westerberg 4179d3cce0bSMika Westerberg return tb; 41823dd5bb4SAndreas Noever } 419