1 /* SPDX-License-Identifier: GPL-2.0 */ 2 /* 3 * Thunderbolt driver - bus logic (NHI independent) 4 * 5 * Copyright (c) 2014 Andreas Noever <andreas.noever@gmail.com> 6 * Copyright (C) 2018, Intel Corporation 7 */ 8 9 #ifndef TB_H_ 10 #define TB_H_ 11 12 #include <linux/nvmem-provider.h> 13 #include <linux/pci.h> 14 #include <linux/thunderbolt.h> 15 #include <linux/uuid.h> 16 17 #include "tb_regs.h" 18 #include "ctl.h" 19 #include "dma_port.h" 20 21 /** 22 * struct tb_switch_nvm - Structure holding switch NVM information 23 * @major: Major version number of the active NVM portion 24 * @minor: Minor version number of the active NVM portion 25 * @id: Identifier used with both NVM portions 26 * @active: Active portion NVMem device 27 * @non_active: Non-active portion NVMem device 28 * @buf: Buffer where the NVM image is stored before it is written to 29 * the actual NVM flash device 30 * @buf_data_size: Number of bytes actually consumed by the new NVM 31 * image 32 * @authenticating: The switch is authenticating the new NVM 33 */ 34 struct tb_switch_nvm { 35 u8 major; 36 u8 minor; 37 int id; 38 struct nvmem_device *active; 39 struct nvmem_device *non_active; 40 void *buf; 41 size_t buf_data_size; 42 bool authenticating; 43 }; 44 45 #define TB_SWITCH_KEY_SIZE 32 46 #define TB_SWITCH_MAX_DEPTH 6 47 48 /** 49 * struct tb_switch - a thunderbolt switch 50 * @dev: Device for the switch 51 * @config: Switch configuration 52 * @ports: Ports in this switch 53 * @dma_port: If the switch has port supporting DMA configuration based 54 * mailbox this will hold the pointer to that (%NULL 55 * otherwise). If set it also means the switch has 56 * upgradeable NVM. 57 * @tb: Pointer to the domain the switch belongs to 58 * @uid: Unique ID of the switch 59 * @uuid: UUID of the switch (or %NULL if not supported) 60 * @vendor: Vendor ID of the switch 61 * @device: Device ID of the switch 62 * @vendor_name: Name of the vendor (or %NULL if not known) 63 * @device_name: Name of the device (or %NULL if not known) 64 * @generation: Switch Thunderbolt generation 65 * @cap_plug_events: Offset to the plug events capability (%0 if not found) 66 * @cap_lc: Offset to the link controller capability (%0 if not found) 67 * @is_unplugged: The switch is going away 68 * @drom: DROM of the switch (%NULL if not found) 69 * @nvm: Pointer to the NVM if the switch has one (%NULL otherwise) 70 * @no_nvm_upgrade: Prevent NVM upgrade of this switch 71 * @safe_mode: The switch is in safe-mode 72 * @boot: Whether the switch was already authorized on boot or not 73 * @rpm: The switch supports runtime PM 74 * @authorized: Whether the switch is authorized by user or policy 75 * @security_level: Switch supported security level 76 * @key: Contains the key used to challenge the device or %NULL if not 77 * supported. Size of the key is %TB_SWITCH_KEY_SIZE. 78 * @connection_id: Connection ID used with ICM messaging 79 * @connection_key: Connection key used with ICM messaging 80 * @link: Root switch link this switch is connected (ICM only) 81 * @depth: Depth in the chain this switch is connected (ICM only) 82 * 83 * When the switch is being added or removed to the domain (other 84 * switches) you need to have domain lock held. 85 */ 86 struct tb_switch { 87 struct device dev; 88 struct tb_regs_switch_header config; 89 struct tb_port *ports; 90 struct tb_dma_port *dma_port; 91 struct tb *tb; 92 u64 uid; 93 uuid_t *uuid; 94 u16 vendor; 95 u16 device; 96 const char *vendor_name; 97 const char *device_name; 98 unsigned int generation; 99 int cap_plug_events; 100 int cap_lc; 101 bool is_unplugged; 102 u8 *drom; 103 struct tb_switch_nvm *nvm; 104 bool no_nvm_upgrade; 105 bool safe_mode; 106 bool boot; 107 bool rpm; 108 unsigned int authorized; 109 enum tb_security_level security_level; 110 u8 *key; 111 u8 connection_id; 112 u8 connection_key; 113 u8 link; 114 u8 depth; 115 }; 116 117 /** 118 * struct tb_port - a thunderbolt port, part of a tb_switch 119 * @config: Cached port configuration read from registers 120 * @sw: Switch the port belongs to 121 * @remote: Remote port (%NULL if not connected) 122 * @xdomain: Remote host (%NULL if not connected) 123 * @cap_phy: Offset, zero if not found 124 * @cap_adap: Offset of the adapter specific capability (%0 if not present) 125 * @port: Port number on switch 126 * @disabled: Disabled by eeprom 127 * @dual_link_port: If the switch is connected using two ports, points 128 * to the other port. 129 * @link_nr: Is this primary or secondary port on the dual_link. 130 * @in_hopids: Currently allocated input HopIDs 131 * @out_hopids: Currently allocated output HopIDs 132 */ 133 struct tb_port { 134 struct tb_regs_port_header config; 135 struct tb_switch *sw; 136 struct tb_port *remote; 137 struct tb_xdomain *xdomain; 138 int cap_phy; 139 int cap_adap; 140 u8 port; 141 bool disabled; 142 struct tb_port *dual_link_port; 143 u8 link_nr:1; 144 struct ida in_hopids; 145 struct ida out_hopids; 146 }; 147 148 /** 149 * struct tb_path_hop - routing information for a tb_path 150 * @in_port: Ingress port of a switch 151 * @out_port: Egress port of a switch where the packet is routed out 152 * (must be on the same switch than @in_port) 153 * @in_hop_index: HopID where the path configuration entry is placed in 154 * the path config space of @in_port. 155 * @in_counter_index: Used counter index (not used in the driver 156 * currently, %-1 to disable) 157 * @next_hop_index: HopID of the packet when it is routed out from @out_port 158 * @initial_credits: Number of initial flow control credits allocated for 159 * the path 160 * 161 * Hop configuration is always done on the IN port of a switch. 162 * in_port and out_port have to be on the same switch. Packets arriving on 163 * in_port with "hop" = in_hop_index will get routed to through out_port. The 164 * next hop to take (on out_port->remote) is determined by 165 * next_hop_index. When routing packet to another switch (out->remote is 166 * set) the @next_hop_index must match the @in_hop_index of that next 167 * hop to make routing possible. 168 * 169 * in_counter_index is the index of a counter (in TB_CFG_COUNTERS) on the in 170 * port. 171 */ 172 struct tb_path_hop { 173 struct tb_port *in_port; 174 struct tb_port *out_port; 175 int in_hop_index; 176 int in_counter_index; 177 int next_hop_index; 178 unsigned int initial_credits; 179 }; 180 181 /** 182 * enum tb_path_port - path options mask 183 * @TB_PATH_NONE: Do not activate on any hop on path 184 * @TB_PATH_SOURCE: Activate on the first hop (out of src) 185 * @TB_PATH_INTERNAL: Activate on the intermediate hops (not the first/last) 186 * @TB_PATH_DESTINATION: Activate on the last hop (into dst) 187 * @TB_PATH_ALL: Activate on all hops on the path 188 */ 189 enum tb_path_port { 190 TB_PATH_NONE = 0, 191 TB_PATH_SOURCE = 1, 192 TB_PATH_INTERNAL = 2, 193 TB_PATH_DESTINATION = 4, 194 TB_PATH_ALL = 7, 195 }; 196 197 /** 198 * struct tb_path - a unidirectional path between two ports 199 * @tb: Pointer to the domain structure 200 * @name: Name of the path (used for debugging) 201 * @nfc_credits: Number of non flow controlled credits allocated for the path 202 * @ingress_shared_buffer: Shared buffering used for ingress ports on the path 203 * @egress_shared_buffer: Shared buffering used for egress ports on the path 204 * @ingress_fc_enable: Flow control for ingress ports on the path 205 * @egress_fc_enable: Flow control for egress ports on the path 206 * @priority: Priority group if the path 207 * @weight: Weight of the path inside the priority group 208 * @drop_packages: Drop packages from queue tail or head 209 * @activated: Is the path active 210 * @clear_fc: Clear all flow control from the path config space entries 211 * when deactivating this path 212 * @hops: Path hops 213 * @path_length: How many hops the path uses 214 * 215 * A path consists of a number of hops (see &struct tb_path_hop). To 216 * establish a PCIe tunnel two paths have to be created between the two 217 * PCIe ports. 218 */ 219 struct tb_path { 220 struct tb *tb; 221 const char *name; 222 int nfc_credits; 223 enum tb_path_port ingress_shared_buffer; 224 enum tb_path_port egress_shared_buffer; 225 enum tb_path_port ingress_fc_enable; 226 enum tb_path_port egress_fc_enable; 227 228 unsigned int priority:3; 229 int weight:4; 230 bool drop_packages; 231 bool activated; 232 bool clear_fc; 233 struct tb_path_hop *hops; 234 int path_length; 235 }; 236 237 /* HopIDs 0-7 are reserved by the Thunderbolt protocol */ 238 #define TB_PATH_MIN_HOPID 8 239 #define TB_PATH_MAX_HOPS 7 240 241 /** 242 * struct tb_cm_ops - Connection manager specific operations vector 243 * @driver_ready: Called right after control channel is started. Used by 244 * ICM to send driver ready message to the firmware. 245 * @start: Starts the domain 246 * @stop: Stops the domain 247 * @suspend_noirq: Connection manager specific suspend_noirq 248 * @resume_noirq: Connection manager specific resume_noirq 249 * @suspend: Connection manager specific suspend 250 * @complete: Connection manager specific complete 251 * @runtime_suspend: Connection manager specific runtime_suspend 252 * @runtime_resume: Connection manager specific runtime_resume 253 * @handle_event: Handle thunderbolt event 254 * @get_boot_acl: Get boot ACL list 255 * @set_boot_acl: Set boot ACL list 256 * @approve_switch: Approve switch 257 * @add_switch_key: Add key to switch 258 * @challenge_switch_key: Challenge switch using key 259 * @disconnect_pcie_paths: Disconnects PCIe paths before NVM update 260 * @approve_xdomain_paths: Approve (establish) XDomain DMA paths 261 * @disconnect_xdomain_paths: Disconnect XDomain DMA paths 262 */ 263 struct tb_cm_ops { 264 int (*driver_ready)(struct tb *tb); 265 int (*start)(struct tb *tb); 266 void (*stop)(struct tb *tb); 267 int (*suspend_noirq)(struct tb *tb); 268 int (*resume_noirq)(struct tb *tb); 269 int (*suspend)(struct tb *tb); 270 void (*complete)(struct tb *tb); 271 int (*runtime_suspend)(struct tb *tb); 272 int (*runtime_resume)(struct tb *tb); 273 void (*handle_event)(struct tb *tb, enum tb_cfg_pkg_type, 274 const void *buf, size_t size); 275 int (*get_boot_acl)(struct tb *tb, uuid_t *uuids, size_t nuuids); 276 int (*set_boot_acl)(struct tb *tb, const uuid_t *uuids, size_t nuuids); 277 int (*approve_switch)(struct tb *tb, struct tb_switch *sw); 278 int (*add_switch_key)(struct tb *tb, struct tb_switch *sw); 279 int (*challenge_switch_key)(struct tb *tb, struct tb_switch *sw, 280 const u8 *challenge, u8 *response); 281 int (*disconnect_pcie_paths)(struct tb *tb); 282 int (*approve_xdomain_paths)(struct tb *tb, struct tb_xdomain *xd); 283 int (*disconnect_xdomain_paths)(struct tb *tb, struct tb_xdomain *xd); 284 }; 285 286 static inline void *tb_priv(struct tb *tb) 287 { 288 return (void *)tb->privdata; 289 } 290 291 #define TB_AUTOSUSPEND_DELAY 15000 /* ms */ 292 293 /* helper functions & macros */ 294 295 /** 296 * tb_upstream_port() - return the upstream port of a switch 297 * 298 * Every switch has an upstream port (for the root switch it is the NHI). 299 * 300 * During switch alloc/init tb_upstream_port()->remote may be NULL, even for 301 * non root switches (on the NHI port remote is always NULL). 302 * 303 * Return: Returns the upstream port of the switch. 304 */ 305 static inline struct tb_port *tb_upstream_port(struct tb_switch *sw) 306 { 307 return &sw->ports[sw->config.upstream_port_number]; 308 } 309 310 /** 311 * tb_is_upstream_port() - Is the port upstream facing 312 * @port: Port to check 313 * 314 * Returns true if @port is upstream facing port. In case of dual link 315 * ports both return true. 316 */ 317 static inline bool tb_is_upstream_port(const struct tb_port *port) 318 { 319 const struct tb_port *upstream_port = tb_upstream_port(port->sw); 320 return port == upstream_port || port->dual_link_port == upstream_port; 321 } 322 323 static inline u64 tb_route(const struct tb_switch *sw) 324 { 325 return ((u64) sw->config.route_hi) << 32 | sw->config.route_lo; 326 } 327 328 static inline struct tb_port *tb_port_at(u64 route, struct tb_switch *sw) 329 { 330 u8 port; 331 332 port = route >> (sw->config.depth * 8); 333 if (WARN_ON(port > sw->config.max_port_number)) 334 return NULL; 335 return &sw->ports[port]; 336 } 337 338 /** 339 * tb_port_has_remote() - Does the port have switch connected downstream 340 * @port: Port to check 341 * 342 * Returns true only when the port is primary port and has remote set. 343 */ 344 static inline bool tb_port_has_remote(const struct tb_port *port) 345 { 346 if (tb_is_upstream_port(port)) 347 return false; 348 if (!port->remote) 349 return false; 350 if (port->dual_link_port && port->link_nr) 351 return false; 352 353 return true; 354 } 355 356 static inline bool tb_port_is_null(const struct tb_port *port) 357 { 358 return port && port->port && port->config.type == TB_TYPE_PORT; 359 } 360 361 static inline bool tb_port_is_pcie_down(const struct tb_port *port) 362 { 363 return port && port->config.type == TB_TYPE_PCIE_DOWN; 364 } 365 366 static inline bool tb_port_is_pcie_up(const struct tb_port *port) 367 { 368 return port && port->config.type == TB_TYPE_PCIE_UP; 369 } 370 371 static inline bool tb_port_is_dpin(const struct tb_port *port) 372 { 373 return port && port->config.type == TB_TYPE_DP_HDMI_IN; 374 } 375 376 static inline bool tb_port_is_dpout(const struct tb_port *port) 377 { 378 return port && port->config.type == TB_TYPE_DP_HDMI_OUT; 379 } 380 381 static inline int tb_sw_read(struct tb_switch *sw, void *buffer, 382 enum tb_cfg_space space, u32 offset, u32 length) 383 { 384 if (sw->is_unplugged) 385 return -ENODEV; 386 return tb_cfg_read(sw->tb->ctl, 387 buffer, 388 tb_route(sw), 389 0, 390 space, 391 offset, 392 length); 393 } 394 395 static inline int tb_sw_write(struct tb_switch *sw, void *buffer, 396 enum tb_cfg_space space, u32 offset, u32 length) 397 { 398 if (sw->is_unplugged) 399 return -ENODEV; 400 return tb_cfg_write(sw->tb->ctl, 401 buffer, 402 tb_route(sw), 403 0, 404 space, 405 offset, 406 length); 407 } 408 409 static inline int tb_port_read(struct tb_port *port, void *buffer, 410 enum tb_cfg_space space, u32 offset, u32 length) 411 { 412 if (port->sw->is_unplugged) 413 return -ENODEV; 414 return tb_cfg_read(port->sw->tb->ctl, 415 buffer, 416 tb_route(port->sw), 417 port->port, 418 space, 419 offset, 420 length); 421 } 422 423 static inline int tb_port_write(struct tb_port *port, const void *buffer, 424 enum tb_cfg_space space, u32 offset, u32 length) 425 { 426 if (port->sw->is_unplugged) 427 return -ENODEV; 428 return tb_cfg_write(port->sw->tb->ctl, 429 buffer, 430 tb_route(port->sw), 431 port->port, 432 space, 433 offset, 434 length); 435 } 436 437 #define tb_err(tb, fmt, arg...) dev_err(&(tb)->nhi->pdev->dev, fmt, ## arg) 438 #define tb_WARN(tb, fmt, arg...) dev_WARN(&(tb)->nhi->pdev->dev, fmt, ## arg) 439 #define tb_warn(tb, fmt, arg...) dev_warn(&(tb)->nhi->pdev->dev, fmt, ## arg) 440 #define tb_info(tb, fmt, arg...) dev_info(&(tb)->nhi->pdev->dev, fmt, ## arg) 441 #define tb_dbg(tb, fmt, arg...) dev_dbg(&(tb)->nhi->pdev->dev, fmt, ## arg) 442 443 #define __TB_SW_PRINT(level, sw, fmt, arg...) \ 444 do { \ 445 const struct tb_switch *__sw = (sw); \ 446 level(__sw->tb, "%llx: " fmt, \ 447 tb_route(__sw), ## arg); \ 448 } while (0) 449 #define tb_sw_WARN(sw, fmt, arg...) __TB_SW_PRINT(tb_WARN, sw, fmt, ##arg) 450 #define tb_sw_warn(sw, fmt, arg...) __TB_SW_PRINT(tb_warn, sw, fmt, ##arg) 451 #define tb_sw_info(sw, fmt, arg...) __TB_SW_PRINT(tb_info, sw, fmt, ##arg) 452 #define tb_sw_dbg(sw, fmt, arg...) __TB_SW_PRINT(tb_dbg, sw, fmt, ##arg) 453 454 #define __TB_PORT_PRINT(level, _port, fmt, arg...) \ 455 do { \ 456 const struct tb_port *__port = (_port); \ 457 level(__port->sw->tb, "%llx:%x: " fmt, \ 458 tb_route(__port->sw), __port->port, ## arg); \ 459 } while (0) 460 #define tb_port_WARN(port, fmt, arg...) \ 461 __TB_PORT_PRINT(tb_WARN, port, fmt, ##arg) 462 #define tb_port_warn(port, fmt, arg...) \ 463 __TB_PORT_PRINT(tb_warn, port, fmt, ##arg) 464 #define tb_port_info(port, fmt, arg...) \ 465 __TB_PORT_PRINT(tb_info, port, fmt, ##arg) 466 #define tb_port_dbg(port, fmt, arg...) \ 467 __TB_PORT_PRINT(tb_dbg, port, fmt, ##arg) 468 469 struct tb *icm_probe(struct tb_nhi *nhi); 470 struct tb *tb_probe(struct tb_nhi *nhi); 471 472 extern struct device_type tb_domain_type; 473 extern struct device_type tb_switch_type; 474 475 int tb_domain_init(void); 476 void tb_domain_exit(void); 477 void tb_switch_exit(void); 478 int tb_xdomain_init(void); 479 void tb_xdomain_exit(void); 480 481 struct tb *tb_domain_alloc(struct tb_nhi *nhi, size_t privsize); 482 int tb_domain_add(struct tb *tb); 483 void tb_domain_remove(struct tb *tb); 484 int tb_domain_suspend_noirq(struct tb *tb); 485 int tb_domain_resume_noirq(struct tb *tb); 486 int tb_domain_suspend(struct tb *tb); 487 void tb_domain_complete(struct tb *tb); 488 int tb_domain_runtime_suspend(struct tb *tb); 489 int tb_domain_runtime_resume(struct tb *tb); 490 int tb_domain_approve_switch(struct tb *tb, struct tb_switch *sw); 491 int tb_domain_approve_switch_key(struct tb *tb, struct tb_switch *sw); 492 int tb_domain_challenge_switch_key(struct tb *tb, struct tb_switch *sw); 493 int tb_domain_disconnect_pcie_paths(struct tb *tb); 494 int tb_domain_approve_xdomain_paths(struct tb *tb, struct tb_xdomain *xd); 495 int tb_domain_disconnect_xdomain_paths(struct tb *tb, struct tb_xdomain *xd); 496 int tb_domain_disconnect_all_paths(struct tb *tb); 497 498 static inline struct tb *tb_domain_get(struct tb *tb) 499 { 500 if (tb) 501 get_device(&tb->dev); 502 return tb; 503 } 504 505 static inline void tb_domain_put(struct tb *tb) 506 { 507 put_device(&tb->dev); 508 } 509 510 struct tb_switch *tb_switch_alloc(struct tb *tb, struct device *parent, 511 u64 route); 512 struct tb_switch *tb_switch_alloc_safe_mode(struct tb *tb, 513 struct device *parent, u64 route); 514 int tb_switch_configure(struct tb_switch *sw); 515 int tb_switch_add(struct tb_switch *sw); 516 void tb_switch_remove(struct tb_switch *sw); 517 void tb_switch_suspend(struct tb_switch *sw); 518 int tb_switch_resume(struct tb_switch *sw); 519 int tb_switch_reset(struct tb *tb, u64 route); 520 void tb_sw_set_unplugged(struct tb_switch *sw); 521 struct tb_switch *tb_switch_find_by_link_depth(struct tb *tb, u8 link, 522 u8 depth); 523 struct tb_switch *tb_switch_find_by_uuid(struct tb *tb, const uuid_t *uuid); 524 struct tb_switch *tb_switch_find_by_route(struct tb *tb, u64 route); 525 526 static inline struct tb_switch *tb_switch_get(struct tb_switch *sw) 527 { 528 if (sw) 529 get_device(&sw->dev); 530 return sw; 531 } 532 533 static inline void tb_switch_put(struct tb_switch *sw) 534 { 535 put_device(&sw->dev); 536 } 537 538 static inline bool tb_is_switch(const struct device *dev) 539 { 540 return dev->type == &tb_switch_type; 541 } 542 543 static inline struct tb_switch *tb_to_switch(struct device *dev) 544 { 545 if (tb_is_switch(dev)) 546 return container_of(dev, struct tb_switch, dev); 547 return NULL; 548 } 549 550 static inline struct tb_switch *tb_switch_parent(struct tb_switch *sw) 551 { 552 return tb_to_switch(sw->dev.parent); 553 } 554 555 static inline bool tb_switch_is_lr(const struct tb_switch *sw) 556 { 557 return sw->config.device_id == PCI_DEVICE_ID_INTEL_LIGHT_RIDGE; 558 } 559 560 static inline bool tb_switch_is_er(const struct tb_switch *sw) 561 { 562 return sw->config.device_id == PCI_DEVICE_ID_INTEL_EAGLE_RIDGE; 563 } 564 565 static inline bool tb_switch_is_cr(const struct tb_switch *sw) 566 { 567 switch (sw->config.device_id) { 568 case PCI_DEVICE_ID_INTEL_CACTUS_RIDGE_2C: 569 case PCI_DEVICE_ID_INTEL_CACTUS_RIDGE_4C: 570 return true; 571 default: 572 return false; 573 } 574 } 575 576 static inline bool tb_switch_is_fr(const struct tb_switch *sw) 577 { 578 switch (sw->config.device_id) { 579 case PCI_DEVICE_ID_INTEL_FALCON_RIDGE_2C_BRIDGE: 580 case PCI_DEVICE_ID_INTEL_FALCON_RIDGE_4C_BRIDGE: 581 return true; 582 default: 583 return false; 584 } 585 } 586 587 int tb_wait_for_port(struct tb_port *port, bool wait_if_unplugged); 588 int tb_port_add_nfc_credits(struct tb_port *port, int credits); 589 int tb_port_set_initial_credits(struct tb_port *port, u32 credits); 590 int tb_port_clear_counter(struct tb_port *port, int counter); 591 int tb_port_alloc_in_hopid(struct tb_port *port, int hopid, int max_hopid); 592 void tb_port_release_in_hopid(struct tb_port *port, int hopid); 593 int tb_port_alloc_out_hopid(struct tb_port *port, int hopid, int max_hopid); 594 void tb_port_release_out_hopid(struct tb_port *port, int hopid); 595 struct tb_port *tb_next_port_on_path(struct tb_port *start, struct tb_port *end, 596 struct tb_port *prev); 597 598 int tb_switch_find_vse_cap(struct tb_switch *sw, enum tb_switch_vse_cap vsec); 599 int tb_port_find_cap(struct tb_port *port, enum tb_port_cap cap); 600 bool tb_port_is_enabled(struct tb_port *port); 601 602 bool tb_pci_port_is_enabled(struct tb_port *port); 603 int tb_pci_port_enable(struct tb_port *port, bool enable); 604 605 int tb_dp_port_hpd_is_active(struct tb_port *port); 606 int tb_dp_port_hpd_clear(struct tb_port *port); 607 int tb_dp_port_set_hops(struct tb_port *port, unsigned int video, 608 unsigned int aux_tx, unsigned int aux_rx); 609 bool tb_dp_port_is_enabled(struct tb_port *port); 610 int tb_dp_port_enable(struct tb_port *port, bool enable); 611 612 struct tb_path *tb_path_discover(struct tb_port *src, int src_hopid, 613 struct tb_port *dst, int dst_hopid, 614 struct tb_port **last, const char *name); 615 struct tb_path *tb_path_alloc(struct tb *tb, struct tb_port *src, int src_hopid, 616 struct tb_port *dst, int dst_hopid, int link_nr, 617 const char *name); 618 void tb_path_free(struct tb_path *path); 619 int tb_path_activate(struct tb_path *path); 620 void tb_path_deactivate(struct tb_path *path); 621 bool tb_path_is_invalid(struct tb_path *path); 622 623 int tb_drom_read(struct tb_switch *sw); 624 int tb_drom_read_uid_only(struct tb_switch *sw, u64 *uid); 625 626 int tb_lc_read_uuid(struct tb_switch *sw, u32 *uuid); 627 int tb_lc_configure_link(struct tb_switch *sw); 628 void tb_lc_unconfigure_link(struct tb_switch *sw); 629 int tb_lc_set_sleep(struct tb_switch *sw); 630 631 static inline int tb_route_length(u64 route) 632 { 633 return (fls64(route) + TB_ROUTE_SHIFT - 1) / TB_ROUTE_SHIFT; 634 } 635 636 /** 637 * tb_downstream_route() - get route to downstream switch 638 * 639 * Port must not be the upstream port (otherwise a loop is created). 640 * 641 * Return: Returns a route to the switch behind @port. 642 */ 643 static inline u64 tb_downstream_route(struct tb_port *port) 644 { 645 return tb_route(port->sw) 646 | ((u64) port->port << (port->sw->config.depth * 8)); 647 } 648 649 bool tb_xdomain_handle_request(struct tb *tb, enum tb_cfg_pkg_type type, 650 const void *buf, size_t size); 651 struct tb_xdomain *tb_xdomain_alloc(struct tb *tb, struct device *parent, 652 u64 route, const uuid_t *local_uuid, 653 const uuid_t *remote_uuid); 654 void tb_xdomain_add(struct tb_xdomain *xd); 655 void tb_xdomain_remove(struct tb_xdomain *xd); 656 struct tb_xdomain *tb_xdomain_find_by_link_depth(struct tb *tb, u8 link, 657 u8 depth); 658 659 #endif 660