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/debugfs.h> 13 #include <linux/nvmem-provider.h> 14 #include <linux/pci.h> 15 #include <linux/thunderbolt.h> 16 #include <linux/uuid.h> 17 #include <linux/bitfield.h> 18 19 #include "tb_regs.h" 20 #include "ctl.h" 21 #include "dma_port.h" 22 23 /* Keep link controller awake during update */ 24 #define QUIRK_FORCE_POWER_LINK_CONTROLLER BIT(0) 25 /* Disable CLx if not supported */ 26 #define QUIRK_NO_CLX BIT(1) 27 /* Need to keep power on while USB4 port is in redrive mode */ 28 #define QUIRK_KEEP_POWER_IN_DP_REDRIVE BIT(2) 29 30 /** 31 * struct tb_nvm - Structure holding NVM information 32 * @dev: Owner of the NVM 33 * @major: Major version number of the active NVM portion 34 * @minor: Minor version number of the active NVM portion 35 * @id: Identifier used with both NVM portions 36 * @active: Active portion NVMem device 37 * @active_size: Size in bytes of the active NVM 38 * @non_active: Non-active portion NVMem device 39 * @buf: Buffer where the NVM image is stored before it is written to 40 * the actual NVM flash device 41 * @buf_data_start: Where the actual image starts after skipping 42 * possible headers 43 * @buf_data_size: Number of bytes actually consumed by the new NVM 44 * image 45 * @authenticating: The device is authenticating the new NVM 46 * @flushed: The image has been flushed to the storage area 47 * @vops: Router vendor specific NVM operations (optional) 48 * 49 * The user of this structure needs to handle serialization of possible 50 * concurrent access. 51 */ 52 struct tb_nvm { 53 struct device *dev; 54 u32 major; 55 u32 minor; 56 int id; 57 struct nvmem_device *active; 58 size_t active_size; 59 struct nvmem_device *non_active; 60 void *buf; 61 void *buf_data_start; 62 size_t buf_data_size; 63 bool authenticating; 64 bool flushed; 65 const struct tb_nvm_vendor_ops *vops; 66 }; 67 68 enum tb_nvm_write_ops { 69 WRITE_AND_AUTHENTICATE = 1, 70 WRITE_ONLY = 2, 71 AUTHENTICATE_ONLY = 3, 72 }; 73 74 #define TB_SWITCH_KEY_SIZE 32 75 #define TB_SWITCH_MAX_DEPTH 6 76 #define USB4_SWITCH_MAX_DEPTH 5 77 78 /** 79 * enum tb_switch_tmu_mode - TMU mode 80 * @TB_SWITCH_TMU_MODE_OFF: TMU is off 81 * @TB_SWITCH_TMU_MODE_LOWRES: Uni-directional, normal mode 82 * @TB_SWITCH_TMU_MODE_HIFI_UNI: Uni-directional, HiFi mode 83 * @TB_SWITCH_TMU_MODE_HIFI_BI: Bi-directional, HiFi mode 84 * @TB_SWITCH_TMU_MODE_MEDRES_ENHANCED_UNI: Enhanced Uni-directional, MedRes mode 85 * 86 * Ordering is based on TMU accuracy level (highest last). 87 */ 88 enum tb_switch_tmu_mode { 89 TB_SWITCH_TMU_MODE_OFF, 90 TB_SWITCH_TMU_MODE_LOWRES, 91 TB_SWITCH_TMU_MODE_HIFI_UNI, 92 TB_SWITCH_TMU_MODE_HIFI_BI, 93 TB_SWITCH_TMU_MODE_MEDRES_ENHANCED_UNI, 94 }; 95 96 /** 97 * struct tb_switch_tmu - Structure holding router TMU configuration 98 * @cap: Offset to the TMU capability (%0 if not found) 99 * @has_ucap: Does the switch support uni-directional mode 100 * @mode: TMU mode related to the upstream router. Reflects the HW 101 * setting. Don't care for host router. 102 * @mode_request: TMU mode requested to set. Related to upstream router. 103 * Don't care for host router. 104 */ 105 struct tb_switch_tmu { 106 int cap; 107 bool has_ucap; 108 enum tb_switch_tmu_mode mode; 109 enum tb_switch_tmu_mode mode_request; 110 }; 111 112 /** 113 * struct tb_switch - a thunderbolt switch 114 * @dev: Device for the switch 115 * @config: Switch configuration 116 * @ports: Ports in this switch 117 * @dma_port: If the switch has port supporting DMA configuration based 118 * mailbox this will hold the pointer to that (%NULL 119 * otherwise). If set it also means the switch has 120 * upgradeable NVM. 121 * @tmu: The switch TMU configuration 122 * @tb: Pointer to the domain the switch belongs to 123 * @uid: Unique ID of the switch 124 * @uuid: UUID of the switch (or %NULL if not supported) 125 * @vendor: Vendor ID of the switch 126 * @device: Device ID of the switch 127 * @vendor_name: Name of the vendor (or %NULL if not known) 128 * @device_name: Name of the device (or %NULL if not known) 129 * @link_speed: Speed of the link in Gb/s 130 * @link_width: Width of the upstream facing link 131 * @preferred_link_width: Router preferred link width (only set for Gen 4 links) 132 * @link_usb4: Upstream link is USB4 133 * @generation: Switch Thunderbolt generation 134 * @cap_plug_events: Offset to the plug events capability (%0 if not found) 135 * @cap_vsec_tmu: Offset to the TMU vendor specific capability (%0 if not found) 136 * @cap_lc: Offset to the link controller capability (%0 if not found) 137 * @cap_lp: Offset to the low power (CLx for TBT) capability (%0 if not found) 138 * @is_unplugged: The switch is going away 139 * @drom: DROM of the switch (%NULL if not found) 140 * @nvm: Pointer to the NVM if the switch has one (%NULL otherwise) 141 * @no_nvm_upgrade: Prevent NVM upgrade of this switch 142 * @safe_mode: The switch is in safe-mode 143 * @boot: Whether the switch was already authorized on boot or not 144 * @rpm: The switch supports runtime PM 145 * @authorized: Whether the switch is authorized by user or policy 146 * @security_level: Switch supported security level 147 * @debugfs_dir: Pointer to the debugfs structure 148 * @key: Contains the key used to challenge the device or %NULL if not 149 * supported. Size of the key is %TB_SWITCH_KEY_SIZE. 150 * @connection_id: Connection ID used with ICM messaging 151 * @connection_key: Connection key used with ICM messaging 152 * @link: Root switch link this switch is connected (ICM only) 153 * @depth: Depth in the chain this switch is connected (ICM only) 154 * @rpm_complete: Completion used to wait for runtime resume to 155 * complete (ICM only) 156 * @quirks: Quirks used for this Thunderbolt switch 157 * @credit_allocation: Are the below buffer allocation parameters valid 158 * @max_usb3_credits: Router preferred number of buffers for USB 3.x 159 * @min_dp_aux_credits: Router preferred minimum number of buffers for DP AUX 160 * @min_dp_main_credits: Router preferred minimum number of buffers for DP MAIN 161 * @max_pcie_credits: Router preferred number of buffers for PCIe 162 * @max_dma_credits: Router preferred number of buffers for DMA/P2P 163 * @clx: CLx states on the upstream link of the router 164 * @drom_blob: DROM debugfs blob wrapper 165 * 166 * When the switch is being added or removed to the domain (other 167 * switches) you need to have domain lock held. 168 * 169 * In USB4 terminology this structure represents a router. 170 */ 171 struct tb_switch { 172 struct device dev; 173 struct tb_regs_switch_header config; 174 struct tb_port *ports; 175 struct tb_dma_port *dma_port; 176 struct tb_switch_tmu tmu; 177 struct tb *tb; 178 u64 uid; 179 uuid_t *uuid; 180 u16 vendor; 181 u16 device; 182 const char *vendor_name; 183 const char *device_name; 184 unsigned int link_speed; 185 enum tb_link_width link_width; 186 enum tb_link_width preferred_link_width; 187 bool link_usb4; 188 unsigned int generation; 189 int cap_plug_events; 190 int cap_vsec_tmu; 191 int cap_lc; 192 int cap_lp; 193 bool is_unplugged; 194 u8 *drom; 195 struct tb_nvm *nvm; 196 bool no_nvm_upgrade; 197 bool safe_mode; 198 bool boot; 199 bool rpm; 200 unsigned int authorized; 201 enum tb_security_level security_level; 202 struct dentry *debugfs_dir; 203 u8 *key; 204 u8 connection_id; 205 u8 connection_key; 206 u8 link; 207 u8 depth; 208 struct completion rpm_complete; 209 unsigned long quirks; 210 bool credit_allocation; 211 unsigned int max_usb3_credits; 212 unsigned int min_dp_aux_credits; 213 unsigned int min_dp_main_credits; 214 unsigned int max_pcie_credits; 215 unsigned int max_dma_credits; 216 unsigned int clx; 217 #ifdef CONFIG_DEBUG_FS 218 struct debugfs_blob_wrapper drom_blob; 219 #endif 220 }; 221 222 /** 223 * struct tb_bandwidth_group - Bandwidth management group 224 * @tb: Pointer to the domain the group belongs to 225 * @index: Index of the group (aka Group_ID). Valid values %1-%7 226 * @ports: DP IN adapters belonging to this group are linked here 227 * @reserved: Bandwidth released by one tunnel in the group, available 228 * to others. This is reported as part of estimated_bw for 229 * the group. 230 * @release_work: Worker to release the @reserved if it is not used by 231 * any of the tunnels. 232 * 233 * Any tunnel that requires isochronous bandwidth (that's DP for now) is 234 * attached to a bandwidth group. All tunnels going through the same 235 * USB4 links share the same group and can dynamically distribute the 236 * bandwidth within the group. 237 */ 238 struct tb_bandwidth_group { 239 struct tb *tb; 240 int index; 241 struct list_head ports; 242 int reserved; 243 struct delayed_work release_work; 244 }; 245 246 /** 247 * struct tb_port - a thunderbolt port, part of a tb_switch 248 * @config: Cached port configuration read from registers 249 * @sw: Switch the port belongs to 250 * @remote: Remote port (%NULL if not connected) 251 * @xdomain: Remote host (%NULL if not connected) 252 * @cap_phy: Offset, zero if not found 253 * @cap_tmu: Offset of the adapter specific TMU capability (%0 if not present) 254 * @cap_adap: Offset of the adapter specific capability (%0 if not present) 255 * @cap_usb4: Offset to the USB4 port capability (%0 if not present) 256 * @usb4: Pointer to the USB4 port structure (only if @cap_usb4 is != %0) 257 * @port: Port number on switch 258 * @disabled: Disabled by eeprom or enabled but not implemented 259 * @bonded: true if the port is bonded (two lanes combined as one) 260 * @dual_link_port: If the switch is connected using two ports, points 261 * to the other port. 262 * @link_nr: Is this primary or secondary port on the dual_link. 263 * @in_hopids: Currently allocated input HopIDs 264 * @out_hopids: Currently allocated output HopIDs 265 * @list: Used to link ports to DP resources list 266 * @total_credits: Total number of buffers available for this port 267 * @ctl_credits: Buffers reserved for control path 268 * @dma_credits: Number of credits allocated for DMA tunneling for all 269 * DMA paths through this port. 270 * @group: Bandwidth allocation group the adapter is assigned to. Only 271 * used for DP IN adapters for now. 272 * @group_list: The adapter is linked to the group's list of ports through this 273 * @max_bw: Maximum possible bandwidth through this adapter if set to 274 * non-zero. 275 * @redrive: For DP IN, if true the adapter is in redrive mode. 276 * 277 * In USB4 terminology this structure represents an adapter (protocol or 278 * lane adapter). 279 */ 280 struct tb_port { 281 struct tb_regs_port_header config; 282 struct tb_switch *sw; 283 struct tb_port *remote; 284 struct tb_xdomain *xdomain; 285 int cap_phy; 286 int cap_tmu; 287 int cap_adap; 288 int cap_usb4; 289 struct usb4_port *usb4; 290 u8 port; 291 bool disabled; 292 bool bonded; 293 struct tb_port *dual_link_port; 294 u8 link_nr:1; 295 struct ida in_hopids; 296 struct ida out_hopids; 297 struct list_head list; 298 unsigned int total_credits; 299 unsigned int ctl_credits; 300 unsigned int dma_credits; 301 struct tb_bandwidth_group *group; 302 struct list_head group_list; 303 unsigned int max_bw; 304 bool redrive; 305 }; 306 307 /** 308 * struct usb4_port - USB4 port device 309 * @dev: Device for the port 310 * @port: Pointer to the lane 0 adapter 311 * @can_offline: Does the port have necessary platform support to move 312 * it into offline mode and back 313 * @offline: The port is currently in offline mode 314 * @margining: Pointer to margining structure if enabled 315 */ 316 struct usb4_port { 317 struct device dev; 318 struct tb_port *port; 319 bool can_offline; 320 bool offline; 321 #ifdef CONFIG_USB4_DEBUGFS_MARGINING 322 struct tb_margining *margining; 323 #endif 324 }; 325 326 /** 327 * struct tb_retimer - Thunderbolt retimer 328 * @dev: Device for the retimer 329 * @tb: Pointer to the domain the retimer belongs to 330 * @index: Retimer index facing the router USB4 port 331 * @vendor: Vendor ID of the retimer 332 * @device: Device ID of the retimer 333 * @port: Pointer to the lane 0 adapter 334 * @nvm: Pointer to the NVM if the retimer has one (%NULL otherwise) 335 * @no_nvm_upgrade: Prevent NVM upgrade of this retimer 336 * @auth_status: Status of last NVM authentication 337 * @margining: Pointer to margining structure if enabled 338 */ 339 struct tb_retimer { 340 struct device dev; 341 struct tb *tb; 342 u8 index; 343 u32 vendor; 344 u32 device; 345 struct tb_port *port; 346 struct tb_nvm *nvm; 347 bool no_nvm_upgrade; 348 u32 auth_status; 349 #ifdef CONFIG_USB4_DEBUGFS_MARGINING 350 struct tb_margining *margining; 351 #endif 352 }; 353 354 /** 355 * struct tb_path_hop - routing information for a tb_path 356 * @in_port: Ingress port of a switch 357 * @out_port: Egress port of a switch where the packet is routed out 358 * (must be on the same switch as @in_port) 359 * @in_hop_index: HopID where the path configuration entry is placed in 360 * the path config space of @in_port. 361 * @in_counter_index: Used counter index (not used in the driver 362 * currently, %-1 to disable) 363 * @next_hop_index: HopID of the packet when it is routed out from @out_port 364 * @initial_credits: Number of initial flow control credits allocated for 365 * the path 366 * @nfc_credits: Number of non-flow controlled buffers allocated for the 367 * @in_port. 368 * @pm_support: Set path PM packet support bit to 1 (for USB4 v2 routers) 369 * 370 * Hop configuration is always done on the IN port of a switch. 371 * in_port and out_port have to be on the same switch. Packets arriving on 372 * in_port with "hop" = in_hop_index will get routed to through out_port. The 373 * next hop to take (on out_port->remote) is determined by 374 * next_hop_index. When routing packet to another switch (out->remote is 375 * set) the @next_hop_index must match the @in_hop_index of that next 376 * hop to make routing possible. 377 * 378 * in_counter_index is the index of a counter (in TB_CFG_COUNTERS) on the in 379 * port. 380 */ 381 struct tb_path_hop { 382 struct tb_port *in_port; 383 struct tb_port *out_port; 384 int in_hop_index; 385 int in_counter_index; 386 int next_hop_index; 387 unsigned int initial_credits; 388 unsigned int nfc_credits; 389 bool pm_support; 390 }; 391 392 /** 393 * enum tb_path_port - path options mask 394 * @TB_PATH_NONE: Do not activate on any hop on path 395 * @TB_PATH_SOURCE: Activate on the first hop (out of src) 396 * @TB_PATH_INTERNAL: Activate on the intermediate hops (not the first/last) 397 * @TB_PATH_DESTINATION: Activate on the last hop (into dst) 398 * @TB_PATH_ALL: Activate on all hops on the path 399 */ 400 enum tb_path_port { 401 TB_PATH_NONE = 0, 402 TB_PATH_SOURCE = 1, 403 TB_PATH_INTERNAL = 2, 404 TB_PATH_DESTINATION = 4, 405 TB_PATH_ALL = 7, 406 }; 407 408 /** 409 * struct tb_path - a unidirectional path between two ports 410 * @tb: Pointer to the domain structure 411 * @name: Name of the path (used for debugging) 412 * @ingress_shared_buffer: Shared buffering used for ingress ports on the path 413 * @egress_shared_buffer: Shared buffering used for egress ports on the path 414 * @ingress_fc_enable: Flow control for ingress ports on the path 415 * @egress_fc_enable: Flow control for egress ports on the path 416 * @priority: Priority group if the path 417 * @weight: Weight of the path inside the priority group 418 * @drop_packages: Drop packages from queue tail or head 419 * @activated: Is the path active 420 * @clear_fc: Clear all flow control from the path config space entries 421 * when deactivating this path 422 * @path_length: How many hops the path uses 423 * @alloc_hopid: Does this path consume port HopID 424 * @hops: Path hops 425 * 426 * A path consists of a number of hops (see &struct tb_path_hop). To 427 * establish a PCIe tunnel two paths have to be created between the two 428 * PCIe ports. 429 */ 430 struct tb_path { 431 struct tb *tb; 432 const char *name; 433 enum tb_path_port ingress_shared_buffer; 434 enum tb_path_port egress_shared_buffer; 435 enum tb_path_port ingress_fc_enable; 436 enum tb_path_port egress_fc_enable; 437 438 unsigned int priority:3; 439 int weight:4; 440 bool drop_packages; 441 bool activated; 442 bool clear_fc; 443 int path_length; 444 bool alloc_hopid; 445 446 struct tb_path_hop hops[] __counted_by(path_length); 447 }; 448 449 /* HopIDs 0-7 are reserved by the Thunderbolt protocol */ 450 #define TB_PATH_MIN_HOPID 8 451 /* 452 * Support paths from the farthest (depth 6) router to the host and back 453 * to the same level (not necessarily to the same router). 454 */ 455 #define TB_PATH_MAX_HOPS (7 * 2) 456 457 /* Possible wake types */ 458 #define TB_WAKE_ON_CONNECT BIT(0) 459 #define TB_WAKE_ON_DISCONNECT BIT(1) 460 #define TB_WAKE_ON_USB4 BIT(2) 461 #define TB_WAKE_ON_USB3 BIT(3) 462 #define TB_WAKE_ON_PCIE BIT(4) 463 #define TB_WAKE_ON_DP BIT(5) 464 465 /* CL states */ 466 #define TB_CL0S BIT(0) 467 #define TB_CL1 BIT(1) 468 #define TB_CL2 BIT(2) 469 470 /** 471 * struct tb_cm_ops - Connection manager specific operations vector 472 * @driver_ready: Called right after control channel is started. Used by 473 * ICM to send driver ready message to the firmware. 474 * @start: Starts the domain 475 * @stop: Stops the domain 476 * @deinit: Perform any cleanup after the domain is stopped but before 477 * it is unregistered. Called without @tb->lock taken. Optional. 478 * @suspend_noirq: Connection manager specific suspend_noirq 479 * @resume_noirq: Connection manager specific resume_noirq 480 * @suspend: Connection manager specific suspend 481 * @freeze_noirq: Connection manager specific freeze_noirq 482 * @thaw_noirq: Connection manager specific thaw_noirq 483 * @complete: Connection manager specific complete 484 * @runtime_suspend: Connection manager specific runtime_suspend 485 * @runtime_resume: Connection manager specific runtime_resume 486 * @runtime_suspend_switch: Runtime suspend a switch 487 * @runtime_resume_switch: Runtime resume a switch 488 * @handle_event: Handle thunderbolt event 489 * @get_boot_acl: Get boot ACL list 490 * @set_boot_acl: Set boot ACL list 491 * @disapprove_switch: Disapprove switch (disconnect PCIe tunnel) 492 * @approve_switch: Approve switch 493 * @add_switch_key: Add key to switch 494 * @challenge_switch_key: Challenge switch using key 495 * @disconnect_pcie_paths: Disconnects PCIe paths before NVM update 496 * @approve_xdomain_paths: Approve (establish) XDomain DMA paths 497 * @disconnect_xdomain_paths: Disconnect XDomain DMA paths 498 * @usb4_switch_op: Optional proxy for USB4 router operations. If set 499 * this will be called whenever USB4 router operation is 500 * performed. If this returns %-EOPNOTSUPP then the 501 * native USB4 router operation is called. 502 * @usb4_switch_nvm_authenticate_status: Optional callback that the CM 503 * implementation can use to return 504 * status of USB4 NVM_AUTH router 505 * operation. 506 */ 507 struct tb_cm_ops { 508 int (*driver_ready)(struct tb *tb); 509 int (*start)(struct tb *tb, bool reset); 510 void (*stop)(struct tb *tb); 511 void (*deinit)(struct tb *tb); 512 int (*suspend_noirq)(struct tb *tb); 513 int (*resume_noirq)(struct tb *tb); 514 int (*suspend)(struct tb *tb); 515 int (*freeze_noirq)(struct tb *tb); 516 int (*thaw_noirq)(struct tb *tb); 517 void (*complete)(struct tb *tb); 518 int (*runtime_suspend)(struct tb *tb); 519 int (*runtime_resume)(struct tb *tb); 520 int (*runtime_suspend_switch)(struct tb_switch *sw); 521 int (*runtime_resume_switch)(struct tb_switch *sw); 522 void (*handle_event)(struct tb *tb, enum tb_cfg_pkg_type, 523 const void *buf, size_t size); 524 int (*get_boot_acl)(struct tb *tb, uuid_t *uuids, size_t nuuids); 525 int (*set_boot_acl)(struct tb *tb, const uuid_t *uuids, size_t nuuids); 526 int (*disapprove_switch)(struct tb *tb, struct tb_switch *sw); 527 int (*approve_switch)(struct tb *tb, struct tb_switch *sw); 528 int (*add_switch_key)(struct tb *tb, struct tb_switch *sw); 529 int (*challenge_switch_key)(struct tb *tb, struct tb_switch *sw, 530 const u8 *challenge, u8 *response); 531 int (*disconnect_pcie_paths)(struct tb *tb); 532 int (*approve_xdomain_paths)(struct tb *tb, struct tb_xdomain *xd, 533 int transmit_path, int transmit_ring, 534 int receive_path, int receive_ring); 535 int (*disconnect_xdomain_paths)(struct tb *tb, struct tb_xdomain *xd, 536 int transmit_path, int transmit_ring, 537 int receive_path, int receive_ring); 538 int (*usb4_switch_op)(struct tb_switch *sw, u16 opcode, u32 *metadata, 539 u8 *status, const void *tx_data, size_t tx_data_len, 540 void *rx_data, size_t rx_data_len); 541 int (*usb4_switch_nvm_authenticate_status)(struct tb_switch *sw, 542 u32 *status); 543 }; 544 545 static inline void *tb_priv(struct tb *tb) 546 { 547 return (void *)tb->privdata; 548 } 549 550 #define TB_AUTOSUSPEND_DELAY 15000 /* ms */ 551 552 /* helper functions & macros */ 553 554 /** 555 * tb_upstream_port() - return the upstream port of a switch 556 * @sw: Router 557 * 558 * Every switch has an upstream port (for the root switch it is the NHI). 559 * 560 * During switch alloc/init tb_upstream_port()->remote may be NULL, even for 561 * non root switches (on the NHI port remote is always NULL). 562 * 563 * Return: Pointer to &struct tb_port. 564 */ 565 static inline struct tb_port *tb_upstream_port(struct tb_switch *sw) 566 { 567 return &sw->ports[sw->config.upstream_port_number]; 568 } 569 570 /** 571 * tb_is_upstream_port() - Is the port upstream facing 572 * @port: Port to check 573 * 574 * Return: %true if @port is upstream facing port. In case of dual link 575 * ports, both return %true. 576 */ 577 static inline bool tb_is_upstream_port(const struct tb_port *port) 578 { 579 const struct tb_port *upstream_port = tb_upstream_port(port->sw); 580 return port == upstream_port || port->dual_link_port == upstream_port; 581 } 582 583 static inline u64 tb_route(const struct tb_switch *sw) 584 { 585 return ((u64) sw->config.route_hi) << 32 | sw->config.route_lo; 586 } 587 588 static inline struct tb_port *tb_port_at(u64 route, struct tb_switch *sw) 589 { 590 u8 port; 591 592 port = route >> (sw->config.depth * 8); 593 if (WARN_ON(port > sw->config.max_port_number)) 594 return NULL; 595 return &sw->ports[port]; 596 } 597 598 static inline const char *tb_width_name(enum tb_link_width width) 599 { 600 switch (width) { 601 case TB_LINK_WIDTH_SINGLE: 602 return "symmetric, single lane"; 603 case TB_LINK_WIDTH_DUAL: 604 return "symmetric, dual lanes"; 605 case TB_LINK_WIDTH_ASYM_TX: 606 return "asymmetric, 3 transmitters, 1 receiver"; 607 case TB_LINK_WIDTH_ASYM_RX: 608 return "asymmetric, 3 receivers, 1 transmitter"; 609 default: 610 return "unknown"; 611 } 612 } 613 614 /** 615 * tb_port_has_remote() - Does the port have switch connected downstream 616 * @port: Port to check 617 * 618 * Return: %true only when the port is primary port and has remote set. 619 */ 620 static inline bool tb_port_has_remote(const struct tb_port *port) 621 { 622 if (tb_is_upstream_port(port)) 623 return false; 624 if (!port->remote) 625 return false; 626 if (port->dual_link_port && port->link_nr) 627 return false; 628 629 return true; 630 } 631 632 static inline bool tb_port_is_null(const struct tb_port *port) 633 { 634 return port && port->port && port->config.type == TB_TYPE_PORT; 635 } 636 637 static inline bool tb_port_is_nhi(const struct tb_port *port) 638 { 639 return port && port->config.type == TB_TYPE_NHI; 640 } 641 642 static inline bool tb_port_is_pcie_down(const struct tb_port *port) 643 { 644 return port && port->config.type == TB_TYPE_PCIE_DOWN; 645 } 646 647 static inline bool tb_port_is_pcie_up(const struct tb_port *port) 648 { 649 return port && port->config.type == TB_TYPE_PCIE_UP; 650 } 651 652 static inline bool tb_port_is_dpin(const struct tb_port *port) 653 { 654 return port && port->config.type == TB_TYPE_DP_HDMI_IN; 655 } 656 657 static inline bool tb_port_is_dpout(const struct tb_port *port) 658 { 659 return port && port->config.type == TB_TYPE_DP_HDMI_OUT; 660 } 661 662 static inline bool tb_port_is_usb3_down(const struct tb_port *port) 663 { 664 return port && port->config.type == TB_TYPE_USB3_DOWN; 665 } 666 667 static inline bool tb_port_is_usb3_up(const struct tb_port *port) 668 { 669 return port && port->config.type == TB_TYPE_USB3_UP; 670 } 671 672 static inline int tb_sw_read(struct tb_switch *sw, void *buffer, 673 enum tb_cfg_space space, u32 offset, u32 length) 674 { 675 if (sw->is_unplugged) 676 return -ENODEV; 677 return tb_cfg_read(sw->tb->ctl, 678 buffer, 679 tb_route(sw), 680 0, 681 space, 682 offset, 683 length); 684 } 685 686 static inline int tb_sw_write(struct tb_switch *sw, const void *buffer, 687 enum tb_cfg_space space, u32 offset, u32 length) 688 { 689 if (sw->is_unplugged) 690 return -ENODEV; 691 return tb_cfg_write(sw->tb->ctl, 692 buffer, 693 tb_route(sw), 694 0, 695 space, 696 offset, 697 length); 698 } 699 700 static inline int tb_port_read(struct tb_port *port, void *buffer, 701 enum tb_cfg_space space, u32 offset, u32 length) 702 { 703 if (port->sw->is_unplugged) 704 return -ENODEV; 705 return tb_cfg_read(port->sw->tb->ctl, 706 buffer, 707 tb_route(port->sw), 708 port->port, 709 space, 710 offset, 711 length); 712 } 713 714 static inline int tb_port_write(struct tb_port *port, const void *buffer, 715 enum tb_cfg_space space, u32 offset, u32 length) 716 { 717 if (port->sw->is_unplugged) 718 return -ENODEV; 719 return tb_cfg_write(port->sw->tb->ctl, 720 buffer, 721 tb_route(port->sw), 722 port->port, 723 space, 724 offset, 725 length); 726 } 727 728 #define tb_err(tb, fmt, arg...) dev_err(&(tb)->nhi->pdev->dev, fmt, ## arg) 729 #define tb_WARN(tb, fmt, arg...) dev_WARN(&(tb)->nhi->pdev->dev, fmt, ## arg) 730 #define tb_warn(tb, fmt, arg...) dev_warn(&(tb)->nhi->pdev->dev, fmt, ## arg) 731 #define tb_info(tb, fmt, arg...) dev_info(&(tb)->nhi->pdev->dev, fmt, ## arg) 732 #define tb_dbg(tb, fmt, arg...) dev_dbg(&(tb)->nhi->pdev->dev, fmt, ## arg) 733 734 #define __TB_SW_PRINT(level, sw, fmt, arg...) \ 735 do { \ 736 const struct tb_switch *__sw = (sw); \ 737 level(__sw->tb, "%llx: " fmt, \ 738 tb_route(__sw), ## arg); \ 739 } while (0) 740 #define tb_sw_WARN(sw, fmt, arg...) __TB_SW_PRINT(tb_WARN, sw, fmt, ##arg) 741 #define tb_sw_warn(sw, fmt, arg...) __TB_SW_PRINT(tb_warn, sw, fmt, ##arg) 742 #define tb_sw_info(sw, fmt, arg...) __TB_SW_PRINT(tb_info, sw, fmt, ##arg) 743 #define tb_sw_dbg(sw, fmt, arg...) __TB_SW_PRINT(tb_dbg, sw, fmt, ##arg) 744 745 #define __TB_PORT_PRINT(level, _port, fmt, arg...) \ 746 do { \ 747 const struct tb_port *__port = (_port); \ 748 level(__port->sw->tb, "%llx:%u: " fmt, \ 749 tb_route(__port->sw), __port->port, ## arg); \ 750 } while (0) 751 #define tb_port_WARN(port, fmt, arg...) \ 752 __TB_PORT_PRINT(tb_WARN, port, fmt, ##arg) 753 #define tb_port_warn(port, fmt, arg...) \ 754 __TB_PORT_PRINT(tb_warn, port, fmt, ##arg) 755 #define tb_port_info(port, fmt, arg...) \ 756 __TB_PORT_PRINT(tb_info, port, fmt, ##arg) 757 #define tb_port_dbg(port, fmt, arg...) \ 758 __TB_PORT_PRINT(tb_dbg, port, fmt, ##arg) 759 760 struct tb *icm_probe(struct tb_nhi *nhi); 761 struct tb *tb_probe(struct tb_nhi *nhi); 762 763 extern const struct device_type tb_domain_type; 764 extern const struct device_type tb_retimer_type; 765 extern const struct device_type tb_switch_type; 766 extern const struct device_type usb4_port_device_type; 767 768 int tb_domain_init(void); 769 void tb_domain_exit(void); 770 int tb_xdomain_init(void); 771 void tb_xdomain_exit(void); 772 773 struct tb *tb_domain_alloc(struct tb_nhi *nhi, int timeout_msec, size_t privsize); 774 int tb_domain_add(struct tb *tb, bool reset); 775 void tb_domain_remove(struct tb *tb); 776 int tb_domain_suspend_noirq(struct tb *tb); 777 int tb_domain_resume_noirq(struct tb *tb); 778 int tb_domain_suspend(struct tb *tb); 779 int tb_domain_freeze_noirq(struct tb *tb); 780 int tb_domain_thaw_noirq(struct tb *tb); 781 void tb_domain_complete(struct tb *tb); 782 int tb_domain_runtime_suspend(struct tb *tb); 783 int tb_domain_runtime_resume(struct tb *tb); 784 int tb_domain_disapprove_switch(struct tb *tb, struct tb_switch *sw); 785 int tb_domain_approve_switch(struct tb *tb, struct tb_switch *sw); 786 int tb_domain_approve_switch_key(struct tb *tb, struct tb_switch *sw); 787 int tb_domain_challenge_switch_key(struct tb *tb, struct tb_switch *sw); 788 int tb_domain_disconnect_pcie_paths(struct tb *tb); 789 int tb_domain_approve_xdomain_paths(struct tb *tb, struct tb_xdomain *xd, 790 int transmit_path, int transmit_ring, 791 int receive_path, int receive_ring); 792 int tb_domain_disconnect_xdomain_paths(struct tb *tb, struct tb_xdomain *xd, 793 int transmit_path, int transmit_ring, 794 int receive_path, int receive_ring); 795 int tb_domain_disconnect_all_paths(struct tb *tb); 796 797 static inline struct tb *tb_domain_get(struct tb *tb) 798 { 799 if (tb) 800 get_device(&tb->dev); 801 return tb; 802 } 803 804 static inline void tb_domain_put(struct tb *tb) 805 { 806 put_device(&tb->dev); 807 } 808 809 /** 810 * tb_domain_event() - Notify userspace about an event in domain 811 * @tb: Domain where event occurred 812 * @envp: Array of uevent environment strings (can be %NULL) 813 * 814 * This function provides a way to notify userspace about any events 815 * that take place in the domain. 816 */ 817 static inline void tb_domain_event(struct tb *tb, char *envp[]) 818 { 819 kobject_uevent_env(&tb->dev.kobj, KOBJ_CHANGE, envp); 820 } 821 822 struct tb_nvm *tb_nvm_alloc(struct device *dev); 823 int tb_nvm_read_version(struct tb_nvm *nvm); 824 int tb_nvm_validate(struct tb_nvm *nvm); 825 int tb_nvm_write_headers(struct tb_nvm *nvm); 826 int tb_nvm_add_active(struct tb_nvm *nvm, nvmem_reg_read_t reg_read); 827 int tb_nvm_write_buf(struct tb_nvm *nvm, unsigned int offset, void *val, 828 size_t bytes); 829 int tb_nvm_add_non_active(struct tb_nvm *nvm, nvmem_reg_write_t reg_write); 830 void tb_nvm_free(struct tb_nvm *nvm); 831 void tb_nvm_exit(void); 832 833 typedef int (*read_block_fn)(void *, unsigned int, void *, size_t); 834 typedef int (*write_block_fn)(void *, unsigned int, const void *, size_t); 835 836 int tb_nvm_read_data(unsigned int address, void *buf, size_t size, 837 unsigned int retries, read_block_fn read_block, 838 void *read_block_data); 839 int tb_nvm_write_data(unsigned int address, const void *buf, size_t size, 840 unsigned int retries, write_block_fn write_next_block, 841 void *write_block_data); 842 843 int tb_switch_nvm_read(struct tb_switch *sw, unsigned int address, void *buf, 844 size_t size); 845 struct tb_switch *tb_switch_alloc(struct tb *tb, struct device *parent, 846 u64 route); 847 struct tb_switch *tb_switch_alloc_safe_mode(struct tb *tb, 848 struct device *parent, u64 route); 849 int tb_switch_configure(struct tb_switch *sw); 850 int tb_switch_configuration_valid(struct tb_switch *sw); 851 int tb_switch_add(struct tb_switch *sw); 852 void tb_switch_remove(struct tb_switch *sw); 853 void tb_switch_suspend(struct tb_switch *sw, bool runtime); 854 int tb_switch_resume(struct tb_switch *sw, bool runtime); 855 int tb_switch_reset(struct tb_switch *sw); 856 int tb_switch_wait_for_bit(struct tb_switch *sw, u32 offset, u32 bit, 857 u32 value, int timeout_msec); 858 void tb_sw_set_unplugged(struct tb_switch *sw); 859 struct tb_port *tb_switch_find_port(struct tb_switch *sw, 860 enum tb_port_type type); 861 struct tb_switch *tb_switch_find_by_link_depth(struct tb *tb, u8 link, 862 u8 depth); 863 struct tb_switch *tb_switch_find_by_uuid(struct tb *tb, const uuid_t *uuid); 864 struct tb_switch *tb_switch_find_by_route(struct tb *tb, u64 route); 865 866 /** 867 * tb_switch_for_each_port() - Iterate over each switch port 868 * @sw: Switch whose ports to iterate 869 * @p: Port used as iterator 870 * 871 * Iterates over each switch port skipping the control port (port %0). 872 */ 873 #define tb_switch_for_each_port(sw, p) \ 874 for ((p) = &(sw)->ports[1]; \ 875 (p) <= &(sw)->ports[(sw)->config.max_port_number]; (p)++) 876 877 static inline struct tb_switch *tb_switch_get(struct tb_switch *sw) 878 { 879 if (sw) 880 get_device(&sw->dev); 881 return sw; 882 } 883 884 static inline void tb_switch_put(struct tb_switch *sw) 885 { 886 put_device(&sw->dev); 887 } 888 889 static inline bool tb_is_switch(const struct device *dev) 890 { 891 return dev->type == &tb_switch_type; 892 } 893 894 static inline struct tb_switch *tb_to_switch(const struct device *dev) 895 { 896 if (tb_is_switch(dev)) 897 return container_of(dev, struct tb_switch, dev); 898 return NULL; 899 } 900 901 static inline struct tb_switch *tb_switch_parent(struct tb_switch *sw) 902 { 903 return tb_to_switch(sw->dev.parent); 904 } 905 906 /** 907 * tb_switch_downstream_port() - Return downstream facing port of parent router 908 * @sw: Device router pointer 909 * 910 * Call only for device routers. 911 * 912 * Return: Pointer to &struct tb_port or %NULL in case of failure. 913 */ 914 static inline struct tb_port *tb_switch_downstream_port(struct tb_switch *sw) 915 { 916 if (WARN_ON(!tb_route(sw))) 917 return NULL; 918 return tb_port_at(tb_route(sw), tb_switch_parent(sw)); 919 } 920 921 /** 922 * tb_switch_depth() - Returns depth of the connected router 923 * @sw: Router 924 * 925 * Return: Router depth level as a number. 926 */ 927 static inline int tb_switch_depth(const struct tb_switch *sw) 928 { 929 return sw->config.depth; 930 } 931 932 static inline bool tb_switch_is_light_ridge(const struct tb_switch *sw) 933 { 934 return sw->config.vendor_id == PCI_VENDOR_ID_INTEL && 935 sw->config.device_id == PCI_DEVICE_ID_INTEL_LIGHT_RIDGE; 936 } 937 938 static inline bool tb_switch_is_eagle_ridge(const struct tb_switch *sw) 939 { 940 return sw->config.vendor_id == PCI_VENDOR_ID_INTEL && 941 sw->config.device_id == PCI_DEVICE_ID_INTEL_EAGLE_RIDGE; 942 } 943 944 static inline bool tb_switch_is_cactus_ridge(const struct tb_switch *sw) 945 { 946 if (sw->config.vendor_id == PCI_VENDOR_ID_INTEL) { 947 switch (sw->config.device_id) { 948 case PCI_DEVICE_ID_INTEL_CACTUS_RIDGE_2C: 949 case PCI_DEVICE_ID_INTEL_CACTUS_RIDGE_4C: 950 return true; 951 } 952 } 953 return false; 954 } 955 956 static inline bool tb_switch_is_falcon_ridge(const struct tb_switch *sw) 957 { 958 if (sw->config.vendor_id == PCI_VENDOR_ID_INTEL) { 959 switch (sw->config.device_id) { 960 case PCI_DEVICE_ID_INTEL_FALCON_RIDGE_2C_BRIDGE: 961 case PCI_DEVICE_ID_INTEL_FALCON_RIDGE_4C_BRIDGE: 962 return true; 963 } 964 } 965 return false; 966 } 967 968 static inline bool tb_switch_is_alpine_ridge(const struct tb_switch *sw) 969 { 970 if (sw->config.vendor_id == PCI_VENDOR_ID_INTEL) { 971 switch (sw->config.device_id) { 972 case PCI_DEVICE_ID_INTEL_ALPINE_RIDGE_2C_BRIDGE: 973 case PCI_DEVICE_ID_INTEL_ALPINE_RIDGE_4C_BRIDGE: 974 case PCI_DEVICE_ID_INTEL_ALPINE_RIDGE_LP_BRIDGE: 975 case PCI_DEVICE_ID_INTEL_ALPINE_RIDGE_C_4C_BRIDGE: 976 case PCI_DEVICE_ID_INTEL_ALPINE_RIDGE_C_2C_BRIDGE: 977 return true; 978 } 979 } 980 return false; 981 } 982 983 static inline bool tb_switch_is_titan_ridge(const struct tb_switch *sw) 984 { 985 if (sw->config.vendor_id == PCI_VENDOR_ID_INTEL) { 986 switch (sw->config.device_id) { 987 case PCI_DEVICE_ID_INTEL_TITAN_RIDGE_2C_BRIDGE: 988 case PCI_DEVICE_ID_INTEL_TITAN_RIDGE_4C_BRIDGE: 989 case PCI_DEVICE_ID_INTEL_TITAN_RIDGE_DD_BRIDGE: 990 return true; 991 } 992 } 993 return false; 994 } 995 996 static inline bool tb_switch_is_tiger_lake(const struct tb_switch *sw) 997 { 998 if (sw->config.vendor_id == PCI_VENDOR_ID_INTEL) { 999 switch (sw->config.device_id) { 1000 case PCI_DEVICE_ID_INTEL_TGL_NHI0: 1001 case PCI_DEVICE_ID_INTEL_TGL_NHI1: 1002 case PCI_DEVICE_ID_INTEL_TGL_H_NHI0: 1003 case PCI_DEVICE_ID_INTEL_TGL_H_NHI1: 1004 return true; 1005 } 1006 } 1007 return false; 1008 } 1009 1010 /** 1011 * tb_switch_is_icm() - Is the switch handled by ICM firmware 1012 * @sw: Switch to check 1013 * 1014 * In case there is a need to differentiate whether ICM firmware or SW CM 1015 * is handling @sw this function can be called. It is valid to call this 1016 * after tb_switch_alloc() and tb_switch_configure() has been called 1017 * (latter only for SW CM case). 1018 * 1019 * Return: %true if switch is handled by ICM, %false if handled by 1020 * software CM. 1021 */ 1022 static inline bool tb_switch_is_icm(const struct tb_switch *sw) 1023 { 1024 return !sw->config.enabled; 1025 } 1026 1027 int tb_switch_set_link_width(struct tb_switch *sw, enum tb_link_width width); 1028 int tb_switch_configure_link(struct tb_switch *sw); 1029 void tb_switch_unconfigure_link(struct tb_switch *sw); 1030 1031 bool tb_switch_query_dp_resource(struct tb_switch *sw, struct tb_port *in); 1032 int tb_switch_alloc_dp_resource(struct tb_switch *sw, struct tb_port *in); 1033 void tb_switch_dealloc_dp_resource(struct tb_switch *sw, struct tb_port *in); 1034 1035 int tb_switch_tmu_init(struct tb_switch *sw); 1036 int tb_switch_tmu_post_time(struct tb_switch *sw); 1037 int tb_switch_tmu_disable(struct tb_switch *sw); 1038 int tb_switch_tmu_enable(struct tb_switch *sw); 1039 int tb_switch_tmu_configure(struct tb_switch *sw, enum tb_switch_tmu_mode mode); 1040 1041 /** 1042 * tb_switch_tmu_is_configured() - Is given TMU mode configured 1043 * @sw: Router whose mode to check 1044 * @mode: Mode to check 1045 * 1046 * Checks if given router TMU mode is configured to @mode. Note the 1047 * router TMU might not be enabled to this mode. 1048 * 1049 * Return: %true if TMU mode is equal to @mode, %false otherwise. 1050 */ 1051 static inline bool tb_switch_tmu_is_configured(const struct tb_switch *sw, 1052 enum tb_switch_tmu_mode mode) 1053 { 1054 return sw->tmu.mode_request == mode; 1055 } 1056 1057 /** 1058 * tb_switch_tmu_is_enabled() - Checks if the specified TMU mode is enabled 1059 * @sw: Router whose TMU mode to check 1060 * 1061 * Return: %true if hardware TMU configuration matches the requested 1062 * configuration (and is not %TB_SWITCH_TMU_MODE_OFF), %false otherwise. 1063 */ 1064 static inline bool tb_switch_tmu_is_enabled(const struct tb_switch *sw) 1065 { 1066 return sw->tmu.mode != TB_SWITCH_TMU_MODE_OFF && 1067 sw->tmu.mode == sw->tmu.mode_request; 1068 } 1069 1070 bool tb_port_clx_is_enabled(struct tb_port *port, unsigned int clx); 1071 1072 int tb_switch_clx_init(struct tb_switch *sw); 1073 int tb_switch_clx_enable(struct tb_switch *sw, unsigned int clx); 1074 int tb_switch_clx_disable(struct tb_switch *sw); 1075 1076 /** 1077 * tb_switch_clx_is_enabled() - Checks if the CLx is enabled 1078 * @sw: Router to check for the CLx 1079 * @clx: The CLx states to check for 1080 * 1081 * Checks if the specified CLx is enabled on the router upstream link. 1082 * 1083 * Not applicable for a host router. 1084 * 1085 * Return: %true if any of the given states is enabled, %false otherwise. 1086 */ 1087 static inline bool tb_switch_clx_is_enabled(const struct tb_switch *sw, 1088 unsigned int clx) 1089 { 1090 return sw->clx & clx; 1091 } 1092 1093 int tb_switch_pcie_l1_enable(struct tb_switch *sw); 1094 1095 int tb_switch_xhci_connect(struct tb_switch *sw); 1096 void tb_switch_xhci_disconnect(struct tb_switch *sw); 1097 1098 int tb_port_state(struct tb_port *port); 1099 int tb_wait_for_port(struct tb_port *port, bool wait_if_unplugged); 1100 int tb_port_add_nfc_credits(struct tb_port *port, int credits); 1101 int tb_port_clear_counter(struct tb_port *port, int counter); 1102 int tb_port_unlock(struct tb_port *port); 1103 int tb_port_enable(struct tb_port *port); 1104 int tb_port_disable(struct tb_port *port); 1105 int tb_port_alloc_in_hopid(struct tb_port *port, int hopid, int max_hopid); 1106 void tb_port_release_in_hopid(struct tb_port *port, int hopid); 1107 int tb_port_alloc_out_hopid(struct tb_port *port, int hopid, int max_hopid); 1108 void tb_port_release_out_hopid(struct tb_port *port, int hopid); 1109 struct tb_port *tb_next_port_on_path(struct tb_port *start, struct tb_port *end, 1110 struct tb_port *prev); 1111 1112 /** 1113 * tb_port_path_direction_downstream() - Checks if path is directed downstream 1114 * @src: Source adapter 1115 * @dst: Destination adapter 1116 * 1117 * Return: %true only if the specified path from source adapter (@src) 1118 * to destination adapter (@dst) is directed downstream. 1119 */ 1120 static inline bool 1121 tb_port_path_direction_downstream(const struct tb_port *src, 1122 const struct tb_port *dst) 1123 { 1124 return src->sw->config.depth < dst->sw->config.depth; 1125 } 1126 1127 static inline bool tb_port_use_credit_allocation(const struct tb_port *port) 1128 { 1129 return tb_port_is_null(port) && port->sw->credit_allocation; 1130 } 1131 1132 /** 1133 * tb_for_each_port_on_path() - Iterate over each port on path 1134 * @src: Source port 1135 * @dst: Destination port 1136 * @p: Port used as iterator 1137 * 1138 * Walks over each port on path from @src to @dst. 1139 */ 1140 #define tb_for_each_port_on_path(src, dst, p) \ 1141 for ((p) = tb_next_port_on_path((src), (dst), NULL); (p); \ 1142 (p) = tb_next_port_on_path((src), (dst), (p))) 1143 1144 /** 1145 * tb_for_each_upstream_port_on_path() - Iterate over each upstream port on path 1146 * @src: Source port 1147 * @dst: Destination port 1148 * @p: Port used as iterator 1149 * 1150 * Walks over each upstream lane adapter on path from @src to @dst. 1151 */ 1152 #define tb_for_each_upstream_port_on_path(src, dst, p) \ 1153 for ((p) = tb_next_port_on_path((src), (dst), NULL); (p); \ 1154 (p) = tb_next_port_on_path((src), (dst), (p))) \ 1155 if (!tb_port_is_null((p)) || !tb_is_upstream_port((p))) {\ 1156 continue; \ 1157 } else 1158 1159 int tb_port_get_link_speed(struct tb_port *port); 1160 int tb_port_get_link_generation(struct tb_port *port); 1161 int tb_port_get_link_width(struct tb_port *port); 1162 bool tb_port_width_supported(struct tb_port *port, unsigned int width); 1163 int tb_port_set_link_width(struct tb_port *port, enum tb_link_width width); 1164 int tb_port_lane_bonding_enable(struct tb_port *port); 1165 void tb_port_lane_bonding_disable(struct tb_port *port); 1166 int tb_port_wait_for_link_width(struct tb_port *port, unsigned int width, 1167 int timeout_msec); 1168 int tb_port_update_credits(struct tb_port *port); 1169 1170 int tb_switch_find_vse_cap(struct tb_switch *sw, enum tb_switch_vse_cap vsec); 1171 int tb_switch_find_cap(struct tb_switch *sw, enum tb_switch_cap cap); 1172 int tb_switch_next_cap(struct tb_switch *sw, unsigned int offset); 1173 int tb_port_find_cap(struct tb_port *port, enum tb_port_cap cap); 1174 int tb_port_next_cap(struct tb_port *port, unsigned int offset); 1175 bool tb_port_is_enabled(struct tb_port *port); 1176 1177 bool tb_usb3_port_is_enabled(struct tb_port *port); 1178 int tb_usb3_port_enable(struct tb_port *port, bool enable); 1179 1180 bool tb_pci_port_is_enabled(struct tb_port *port); 1181 int tb_pci_port_enable(struct tb_port *port, bool enable); 1182 1183 int tb_dp_port_hpd_is_active(struct tb_port *port); 1184 int tb_dp_port_hpd_clear(struct tb_port *port); 1185 int tb_dp_port_set_hops(struct tb_port *port, unsigned int video, 1186 unsigned int aux_tx, unsigned int aux_rx); 1187 bool tb_dp_port_is_enabled(struct tb_port *port); 1188 int tb_dp_port_enable(struct tb_port *port, bool enable); 1189 1190 struct tb_path *tb_path_discover(struct tb_port *src, int src_hopid, 1191 struct tb_port *dst, int dst_hopid, 1192 struct tb_port **last, const char *name, 1193 bool alloc_hopid); 1194 struct tb_path *tb_path_alloc(struct tb *tb, struct tb_port *src, int src_hopid, 1195 struct tb_port *dst, int dst_hopid, int link_nr, 1196 const char *name); 1197 void tb_path_free(struct tb_path *path); 1198 int tb_path_activate(struct tb_path *path); 1199 void tb_path_deactivate(struct tb_path *path); 1200 int tb_path_deactivate_hop(struct tb_port *port, int hop_index); 1201 bool tb_path_is_invalid(struct tb_path *path); 1202 bool tb_path_port_on_path(const struct tb_path *path, 1203 const struct tb_port *port); 1204 1205 /** 1206 * tb_path_for_each_hop() - Iterate over each hop on path 1207 * @path: Path whose hops to iterate 1208 * @hop: Hop used as iterator 1209 * 1210 * Iterates over each hop on path. 1211 */ 1212 #define tb_path_for_each_hop(path, hop) \ 1213 for ((hop) = &(path)->hops[0]; \ 1214 (hop) <= &(path)->hops[(path)->path_length - 1]; (hop)++) 1215 1216 int tb_drom_read(struct tb_switch *sw); 1217 int tb_drom_read_uid_only(struct tb_switch *sw, u64 *uid); 1218 1219 int tb_lc_read_uuid(struct tb_switch *sw, u32 *uuid); 1220 int tb_lc_reset_port(struct tb_port *port); 1221 int tb_lc_configure_port(struct tb_port *port); 1222 void tb_lc_unconfigure_port(struct tb_port *port); 1223 int tb_lc_configure_xdomain(struct tb_port *port); 1224 void tb_lc_unconfigure_xdomain(struct tb_port *port); 1225 int tb_lc_start_lane_initialization(struct tb_port *port); 1226 bool tb_lc_is_clx_supported(struct tb_port *port); 1227 bool tb_lc_is_usb_plugged(struct tb_port *port); 1228 bool tb_lc_is_xhci_connected(struct tb_port *port); 1229 int tb_lc_xhci_connect(struct tb_port *port); 1230 void tb_lc_xhci_disconnect(struct tb_port *port); 1231 int tb_lc_set_wake(struct tb_switch *sw, unsigned int flags); 1232 int tb_lc_set_sleep(struct tb_switch *sw); 1233 bool tb_lc_lane_bonding_possible(struct tb_switch *sw); 1234 bool tb_lc_dp_sink_query(struct tb_switch *sw, struct tb_port *in); 1235 int tb_lc_dp_sink_alloc(struct tb_switch *sw, struct tb_port *in); 1236 int tb_lc_dp_sink_dealloc(struct tb_switch *sw, struct tb_port *in); 1237 int tb_lc_force_power(struct tb_switch *sw); 1238 1239 static inline int tb_route_length(u64 route) 1240 { 1241 return (fls64(route) + TB_ROUTE_SHIFT - 1) / TB_ROUTE_SHIFT; 1242 } 1243 1244 /** 1245 * tb_downstream_route() - get route to downstream switch 1246 * @port: Port to check 1247 * 1248 * Port must not be the upstream port (otherwise a loop is created). 1249 * 1250 * Return: Route to the switch behind @port. 1251 */ 1252 static inline u64 tb_downstream_route(struct tb_port *port) 1253 { 1254 return tb_route(port->sw) 1255 | ((u64) port->port << (port->sw->config.depth * 8)); 1256 } 1257 1258 bool tb_is_xdomain_enabled(void); 1259 bool tb_xdomain_handle_request(struct tb *tb, enum tb_cfg_pkg_type type, 1260 const void *buf, size_t size); 1261 struct tb_xdomain *tb_xdomain_alloc(struct tb *tb, struct device *parent, 1262 u64 route, const uuid_t *local_uuid, 1263 const uuid_t *remote_uuid); 1264 void tb_xdomain_add(struct tb_xdomain *xd); 1265 void tb_xdomain_remove(struct tb_xdomain *xd); 1266 struct tb_xdomain *tb_xdomain_find_by_link_depth(struct tb *tb, u8 link, 1267 u8 depth); 1268 1269 static inline struct tb_switch *tb_xdomain_parent(struct tb_xdomain *xd) 1270 { 1271 return tb_to_switch(xd->dev.parent); 1272 } 1273 1274 /** 1275 * tb_xdomain_downstream_port() - Return downstream facing port of parent router 1276 * @xd: Xdomain pointer 1277 * 1278 * Return: Pointer to &struct tb_port or %NULL in case of failure. 1279 */ 1280 static inline struct tb_port *tb_xdomain_downstream_port(struct tb_xdomain *xd) 1281 { 1282 return tb_port_at(xd->route, tb_xdomain_parent(xd)); 1283 } 1284 1285 int tb_retimer_nvm_read(struct tb_retimer *rt, unsigned int address, void *buf, 1286 size_t size); 1287 int tb_retimer_scan(struct tb_port *port, bool add); 1288 void tb_retimer_remove_all(struct tb_port *port); 1289 1290 static inline bool tb_is_retimer(const struct device *dev) 1291 { 1292 return dev->type == &tb_retimer_type; 1293 } 1294 1295 static inline struct tb_retimer *tb_to_retimer(struct device *dev) 1296 { 1297 if (tb_is_retimer(dev)) 1298 return container_of(dev, struct tb_retimer, dev); 1299 return NULL; 1300 } 1301 1302 /** 1303 * usb4_switch_version() - Returns USB4 version of the router 1304 * @sw: Router to check 1305 * 1306 * Return: Major version of USB4 router (%1 for v1, %2 for v2 and so 1307 * on). Can be called to pre-USB4 router too and in that case returns %0. 1308 */ 1309 static inline unsigned int usb4_switch_version(const struct tb_switch *sw) 1310 { 1311 return FIELD_GET(USB4_VERSION_MAJOR_MASK, sw->config.thunderbolt_version); 1312 } 1313 1314 /** 1315 * tb_switch_is_usb4() - Is the switch USB4 compliant 1316 * @sw: Switch to check 1317 * 1318 * Return: %true if the @sw is USB4 compliant router, %false otherwise. 1319 */ 1320 static inline bool tb_switch_is_usb4(const struct tb_switch *sw) 1321 { 1322 return usb4_switch_version(sw) > 0; 1323 } 1324 1325 void usb4_switch_check_wakes(struct tb_switch *sw); 1326 int usb4_switch_setup(struct tb_switch *sw); 1327 int usb4_switch_configuration_valid(struct tb_switch *sw); 1328 int usb4_switch_read_uid(struct tb_switch *sw, u64 *uid); 1329 int usb4_switch_drom_read(struct tb_switch *sw, unsigned int address, void *buf, 1330 size_t size); 1331 bool usb4_switch_lane_bonding_possible(struct tb_switch *sw); 1332 int usb4_switch_set_wake(struct tb_switch *sw, unsigned int flags, bool runtime); 1333 int usb4_switch_set_sleep(struct tb_switch *sw); 1334 int usb4_switch_nvm_sector_size(struct tb_switch *sw); 1335 int usb4_switch_nvm_read(struct tb_switch *sw, unsigned int address, void *buf, 1336 size_t size); 1337 int usb4_switch_nvm_set_offset(struct tb_switch *sw, unsigned int address); 1338 int usb4_switch_nvm_write(struct tb_switch *sw, unsigned int address, 1339 const void *buf, size_t size); 1340 int usb4_switch_nvm_authenticate(struct tb_switch *sw); 1341 int usb4_switch_nvm_authenticate_status(struct tb_switch *sw, u32 *status); 1342 int usb4_switch_credits_init(struct tb_switch *sw); 1343 bool usb4_switch_query_dp_resource(struct tb_switch *sw, struct tb_port *in); 1344 int usb4_switch_alloc_dp_resource(struct tb_switch *sw, struct tb_port *in); 1345 int usb4_switch_dealloc_dp_resource(struct tb_switch *sw, struct tb_port *in); 1346 struct tb_port *usb4_switch_map_pcie_down(struct tb_switch *sw, 1347 const struct tb_port *port); 1348 struct tb_port *usb4_switch_map_usb3_down(struct tb_switch *sw, 1349 const struct tb_port *port); 1350 int usb4_switch_add_ports(struct tb_switch *sw); 1351 void usb4_switch_remove_ports(struct tb_switch *sw); 1352 1353 int usb4_port_unlock(struct tb_port *port); 1354 int usb4_port_hotplug_enable(struct tb_port *port); 1355 int usb4_port_reset(struct tb_port *port); 1356 int usb4_port_configure(struct tb_port *port); 1357 void usb4_port_unconfigure(struct tb_port *port); 1358 int usb4_port_configure_xdomain(struct tb_port *port, struct tb_xdomain *xd); 1359 void usb4_port_unconfigure_xdomain(struct tb_port *port); 1360 int usb4_port_router_offline(struct tb_port *port); 1361 int usb4_port_router_online(struct tb_port *port); 1362 int usb4_port_enumerate_retimers(struct tb_port *port); 1363 bool usb4_port_clx_supported(struct tb_port *port); 1364 1365 bool usb4_port_asym_supported(struct tb_port *port); 1366 int usb4_port_asym_set_link_width(struct tb_port *port, enum tb_link_width width); 1367 int usb4_port_asym_start(struct tb_port *port); 1368 1369 /** 1370 * enum usb4_sb_target - Sideband transaction target 1371 * @USB4_SB_TARGET_ROUTER: Target is the router itself 1372 * @USB4_SB_TARGET_PARTNER: Target is partner 1373 * @USB4_SB_TARGET_RETIMER: Target is retimer 1374 */ 1375 enum usb4_sb_target { 1376 USB4_SB_TARGET_ROUTER, 1377 USB4_SB_TARGET_PARTNER, 1378 USB4_SB_TARGET_RETIMER, 1379 }; 1380 1381 int usb4_port_sb_read(struct tb_port *port, enum usb4_sb_target target, u8 index, 1382 u8 reg, void *buf, u8 size); 1383 int usb4_port_sb_write(struct tb_port *port, enum usb4_sb_target target, 1384 u8 index, u8 reg, const void *buf, u8 size); 1385 1386 /** 1387 * enum usb4_margin_sw_error_counter - Software margining error counter operation 1388 * @USB4_MARGIN_SW_ERROR_COUNTER_NOP: No change in counter setup 1389 * @USB4_MARGIN_SW_ERROR_COUNTER_CLEAR: Set the error counter to 0, enable counter 1390 * @USB4_MARGIN_SW_ERROR_COUNTER_START: Start counter, count from last value 1391 * @USB4_MARGIN_SW_ERROR_COUNTER_STOP: Stop counter, do not clear value 1392 */ 1393 enum usb4_margin_sw_error_counter { 1394 USB4_MARGIN_SW_ERROR_COUNTER_NOP, 1395 USB4_MARGIN_SW_ERROR_COUNTER_CLEAR, 1396 USB4_MARGIN_SW_ERROR_COUNTER_START, 1397 USB4_MARGIN_SW_ERROR_COUNTER_STOP, 1398 }; 1399 1400 enum usb4_margining_lane { 1401 USB4_MARGINING_LANE_RX0 = 0, 1402 USB4_MARGINING_LANE_RX1 = 1, 1403 USB4_MARGINING_LANE_RX2 = 2, 1404 USB4_MARGINING_LANE_ALL = 7, 1405 }; 1406 1407 /** 1408 * struct usb4_port_margining_params - USB4 margining parameters 1409 * @error_counter: Error counter operation for software margining 1410 * @ber_level: Current BER level contour value 1411 * @lanes: Lanes to enable for the margining operation 1412 * @voltage_time_offset: Offset for voltage / time for software margining 1413 * @optional_voltage_offset_range: Enable optional extended voltage range 1414 * @right_high: %false if left/low margin test is performed, %true if right/high 1415 * @upper_eye: %true if margin test is done on upper eye, %false if done on 1416 * lower eye 1417 * @time: %true if time margining is used instead of voltage 1418 */ 1419 struct usb4_port_margining_params { 1420 enum usb4_margin_sw_error_counter error_counter; 1421 u32 ber_level; 1422 enum usb4_margining_lane lanes; 1423 u32 voltage_time_offset; 1424 bool optional_voltage_offset_range; 1425 bool right_high; 1426 bool upper_eye; 1427 bool time; 1428 }; 1429 1430 int usb4_port_margining_caps(struct tb_port *port, enum usb4_sb_target target, 1431 u8 index, u32 *caps, size_t ncaps); 1432 int usb4_port_hw_margin(struct tb_port *port, enum usb4_sb_target target, 1433 u8 index, const struct usb4_port_margining_params *params, 1434 u32 *results, size_t nresults); 1435 int usb4_port_sw_margin(struct tb_port *port, enum usb4_sb_target target, 1436 u8 index, const struct usb4_port_margining_params *params, 1437 u32 *results); 1438 int usb4_port_sw_margin_errors(struct tb_port *port, enum usb4_sb_target target, 1439 u8 index, u32 *errors); 1440 1441 int usb4_port_retimer_set_inbound_sbtx(struct tb_port *port, u8 index); 1442 int usb4_port_retimer_unset_inbound_sbtx(struct tb_port *port, u8 index); 1443 int usb4_port_retimer_is_last(struct tb_port *port, u8 index); 1444 int usb4_port_retimer_is_cable(struct tb_port *port, u8 index); 1445 int usb4_port_retimer_nvm_sector_size(struct tb_port *port, u8 index); 1446 int usb4_port_retimer_nvm_set_offset(struct tb_port *port, u8 index, 1447 unsigned int address); 1448 int usb4_port_retimer_nvm_write(struct tb_port *port, u8 index, 1449 unsigned int address, const void *buf, 1450 size_t size); 1451 int usb4_port_retimer_nvm_authenticate(struct tb_port *port, u8 index); 1452 int usb4_port_retimer_nvm_authenticate_status(struct tb_port *port, u8 index, 1453 u32 *status); 1454 int usb4_port_retimer_nvm_read(struct tb_port *port, u8 index, 1455 unsigned int address, void *buf, size_t size); 1456 1457 int usb4_usb3_port_max_link_rate(struct tb_port *port); 1458 int usb4_usb3_port_allocated_bandwidth(struct tb_port *port, int *upstream_bw, 1459 int *downstream_bw); 1460 int usb4_usb3_port_allocate_bandwidth(struct tb_port *port, int *upstream_bw, 1461 int *downstream_bw); 1462 int usb4_usb3_port_release_bandwidth(struct tb_port *port, int *upstream_bw, 1463 int *downstream_bw); 1464 1465 int usb4_dp_port_set_cm_id(struct tb_port *port, int cm_id); 1466 bool usb4_dp_port_bandwidth_mode_supported(struct tb_port *port); 1467 bool usb4_dp_port_bandwidth_mode_enabled(struct tb_port *port); 1468 int usb4_dp_port_set_cm_bandwidth_mode_supported(struct tb_port *port, 1469 bool supported); 1470 int usb4_dp_port_group_id(struct tb_port *port); 1471 int usb4_dp_port_set_group_id(struct tb_port *port, int group_id); 1472 int usb4_dp_port_nrd(struct tb_port *port, int *rate, int *lanes); 1473 int usb4_dp_port_set_nrd(struct tb_port *port, int rate, int lanes); 1474 int usb4_dp_port_granularity(struct tb_port *port); 1475 int usb4_dp_port_set_granularity(struct tb_port *port, int granularity); 1476 int usb4_dp_port_set_estimated_bandwidth(struct tb_port *port, int bw); 1477 int usb4_dp_port_allocated_bandwidth(struct tb_port *port); 1478 int usb4_dp_port_allocate_bandwidth(struct tb_port *port, int bw); 1479 int usb4_dp_port_requested_bandwidth(struct tb_port *port); 1480 1481 int usb4_pci_port_set_ext_encapsulation(struct tb_port *port, bool enable); 1482 1483 static inline bool tb_is_usb4_port_device(const struct device *dev) 1484 { 1485 return dev->type == &usb4_port_device_type; 1486 } 1487 1488 static inline struct usb4_port *tb_to_usb4_port_device(struct device *dev) 1489 { 1490 if (tb_is_usb4_port_device(dev)) 1491 return container_of(dev, struct usb4_port, dev); 1492 return NULL; 1493 } 1494 1495 struct usb4_port *usb4_port_device_add(struct tb_port *port); 1496 void usb4_port_device_remove(struct usb4_port *usb4); 1497 int usb4_port_device_resume(struct usb4_port *usb4); 1498 int usb4_port_index(const struct tb_switch *sw, const struct tb_port *port); 1499 1500 static inline bool usb4_port_device_is_offline(const struct usb4_port *usb4) 1501 { 1502 return usb4->offline; 1503 } 1504 1505 void tb_check_quirks(struct tb_switch *sw); 1506 1507 #ifdef CONFIG_ACPI 1508 bool tb_acpi_add_links(struct tb_nhi *nhi); 1509 1510 bool tb_acpi_is_native(void); 1511 bool tb_acpi_may_tunnel_usb3(void); 1512 bool tb_acpi_may_tunnel_dp(void); 1513 bool tb_acpi_may_tunnel_pcie(void); 1514 bool tb_acpi_is_xdomain_allowed(void); 1515 1516 int tb_acpi_init(void); 1517 void tb_acpi_exit(void); 1518 int tb_acpi_power_on_retimers(struct tb_port *port); 1519 int tb_acpi_power_off_retimers(struct tb_port *port); 1520 #else 1521 static inline bool tb_acpi_add_links(struct tb_nhi *nhi) { return false; } 1522 1523 static inline bool tb_acpi_is_native(void) { return true; } 1524 static inline bool tb_acpi_may_tunnel_usb3(void) { return true; } 1525 static inline bool tb_acpi_may_tunnel_dp(void) { return true; } 1526 static inline bool tb_acpi_may_tunnel_pcie(void) { return true; } 1527 static inline bool tb_acpi_is_xdomain_allowed(void) { return true; } 1528 1529 static inline int tb_acpi_init(void) { return 0; } 1530 static inline void tb_acpi_exit(void) { } 1531 static inline int tb_acpi_power_on_retimers(struct tb_port *port) { return 0; } 1532 static inline int tb_acpi_power_off_retimers(struct tb_port *port) { return 0; } 1533 #endif 1534 1535 #ifdef CONFIG_DEBUG_FS 1536 void tb_debugfs_init(void); 1537 void tb_debugfs_exit(void); 1538 void tb_switch_debugfs_init(struct tb_switch *sw); 1539 void tb_switch_debugfs_remove(struct tb_switch *sw); 1540 void tb_xdomain_debugfs_init(struct tb_xdomain *xd); 1541 void tb_xdomain_debugfs_remove(struct tb_xdomain *xd); 1542 void tb_service_debugfs_init(struct tb_service *svc); 1543 void tb_service_debugfs_remove(struct tb_service *svc); 1544 void tb_retimer_debugfs_init(struct tb_retimer *rt); 1545 void tb_retimer_debugfs_remove(struct tb_retimer *rt); 1546 #else 1547 static inline void tb_debugfs_init(void) { } 1548 static inline void tb_debugfs_exit(void) { } 1549 static inline void tb_switch_debugfs_init(struct tb_switch *sw) { } 1550 static inline void tb_switch_debugfs_remove(struct tb_switch *sw) { } 1551 static inline void tb_xdomain_debugfs_init(struct tb_xdomain *xd) { } 1552 static inline void tb_xdomain_debugfs_remove(struct tb_xdomain *xd) { } 1553 static inline void tb_service_debugfs_init(struct tb_service *svc) { } 1554 static inline void tb_service_debugfs_remove(struct tb_service *svc) { } 1555 static inline void tb_retimer_debugfs_init(struct tb_retimer *rt) { } 1556 static inline void tb_retimer_debugfs_remove(struct tb_retimer *rt) { } 1557 #endif 1558 1559 #endif 1560