Mika Westerberg | f67cf49 | 2017-06-06 15:25:16 +0300 | [diff] [blame] | 1 | /* |
| 2 | * Internal Thunderbolt Connection Manager. This is a firmware running on |
| 3 | * the Thunderbolt host controller performing most of the low-level |
| 4 | * handling. |
| 5 | * |
| 6 | * Copyright (C) 2017, Intel Corporation |
| 7 | * Authors: Michael Jamet <michael.jamet@intel.com> |
| 8 | * Mika Westerberg <mika.westerberg@linux.intel.com> |
| 9 | * |
| 10 | * This program is free software; you can redistribute it and/or modify |
| 11 | * it under the terms of the GNU General Public License version 2 as |
| 12 | * published by the Free Software Foundation. |
| 13 | */ |
| 14 | |
| 15 | #include <linux/delay.h> |
| 16 | #include <linux/dmi.h> |
| 17 | #include <linux/mutex.h> |
| 18 | #include <linux/pci.h> |
| 19 | #include <linux/sizes.h> |
| 20 | #include <linux/slab.h> |
| 21 | #include <linux/workqueue.h> |
| 22 | |
| 23 | #include "ctl.h" |
| 24 | #include "nhi_regs.h" |
| 25 | #include "tb.h" |
| 26 | |
| 27 | #define PCIE2CIO_CMD 0x30 |
| 28 | #define PCIE2CIO_CMD_TIMEOUT BIT(31) |
| 29 | #define PCIE2CIO_CMD_START BIT(30) |
| 30 | #define PCIE2CIO_CMD_WRITE BIT(21) |
| 31 | #define PCIE2CIO_CMD_CS_MASK GENMASK(20, 19) |
| 32 | #define PCIE2CIO_CMD_CS_SHIFT 19 |
| 33 | #define PCIE2CIO_CMD_PORT_MASK GENMASK(18, 13) |
| 34 | #define PCIE2CIO_CMD_PORT_SHIFT 13 |
| 35 | |
| 36 | #define PCIE2CIO_WRDATA 0x34 |
| 37 | #define PCIE2CIO_RDDATA 0x38 |
| 38 | |
| 39 | #define PHY_PORT_CS1 0x37 |
| 40 | #define PHY_PORT_CS1_LINK_DISABLE BIT(14) |
| 41 | #define PHY_PORT_CS1_LINK_STATE_MASK GENMASK(29, 26) |
| 42 | #define PHY_PORT_CS1_LINK_STATE_SHIFT 26 |
| 43 | |
| 44 | #define ICM_TIMEOUT 5000 /* ms */ |
| 45 | #define ICM_MAX_LINK 4 |
| 46 | #define ICM_MAX_DEPTH 6 |
| 47 | |
| 48 | /** |
| 49 | * struct icm - Internal connection manager private data |
| 50 | * @request_lock: Makes sure only one message is send to ICM at time |
| 51 | * @rescan_work: Work used to rescan the surviving switches after resume |
| 52 | * @upstream_port: Pointer to the PCIe upstream port this host |
| 53 | * controller is connected. This is only set for systems |
| 54 | * where ICM needs to be started manually |
| 55 | * @vnd_cap: Vendor defined capability where PCIe2CIO mailbox resides |
| 56 | * (only set when @upstream_port is not %NULL) |
Mika Westerberg | e6b245c | 2017-06-06 15:25:17 +0300 | [diff] [blame^] | 57 | * @safe_mode: ICM is in safe mode |
Mika Westerberg | f67cf49 | 2017-06-06 15:25:16 +0300 | [diff] [blame] | 58 | * @is_supported: Checks if we can support ICM on this controller |
| 59 | * @get_mode: Read and return the ICM firmware mode (optional) |
| 60 | * @get_route: Find a route string for given switch |
| 61 | * @device_connected: Handle device connected ICM message |
| 62 | * @device_disconnected: Handle device disconnected ICM message |
| 63 | */ |
| 64 | struct icm { |
| 65 | struct mutex request_lock; |
| 66 | struct delayed_work rescan_work; |
| 67 | struct pci_dev *upstream_port; |
| 68 | int vnd_cap; |
Mika Westerberg | e6b245c | 2017-06-06 15:25:17 +0300 | [diff] [blame^] | 69 | bool safe_mode; |
Mika Westerberg | f67cf49 | 2017-06-06 15:25:16 +0300 | [diff] [blame] | 70 | bool (*is_supported)(struct tb *tb); |
| 71 | int (*get_mode)(struct tb *tb); |
| 72 | int (*get_route)(struct tb *tb, u8 link, u8 depth, u64 *route); |
| 73 | void (*device_connected)(struct tb *tb, |
| 74 | const struct icm_pkg_header *hdr); |
| 75 | void (*device_disconnected)(struct tb *tb, |
| 76 | const struct icm_pkg_header *hdr); |
| 77 | }; |
| 78 | |
| 79 | struct icm_notification { |
| 80 | struct work_struct work; |
| 81 | struct icm_pkg_header *pkg; |
| 82 | struct tb *tb; |
| 83 | }; |
| 84 | |
| 85 | static inline struct tb *icm_to_tb(struct icm *icm) |
| 86 | { |
| 87 | return ((void *)icm - sizeof(struct tb)); |
| 88 | } |
| 89 | |
| 90 | static inline u8 phy_port_from_route(u64 route, u8 depth) |
| 91 | { |
| 92 | return tb_switch_phy_port_from_link(route >> ((depth - 1) * 8)); |
| 93 | } |
| 94 | |
| 95 | static inline u8 dual_link_from_link(u8 link) |
| 96 | { |
| 97 | return link ? ((link - 1) ^ 0x01) + 1 : 0; |
| 98 | } |
| 99 | |
| 100 | static inline u64 get_route(u32 route_hi, u32 route_lo) |
| 101 | { |
| 102 | return (u64)route_hi << 32 | route_lo; |
| 103 | } |
| 104 | |
| 105 | static inline bool is_apple(void) |
| 106 | { |
| 107 | return dmi_match(DMI_BOARD_VENDOR, "Apple Inc."); |
| 108 | } |
| 109 | |
| 110 | static bool icm_match(const struct tb_cfg_request *req, |
| 111 | const struct ctl_pkg *pkg) |
| 112 | { |
| 113 | const struct icm_pkg_header *res_hdr = pkg->buffer; |
| 114 | const struct icm_pkg_header *req_hdr = req->request; |
| 115 | |
| 116 | if (pkg->frame.eof != req->response_type) |
| 117 | return false; |
| 118 | if (res_hdr->code != req_hdr->code) |
| 119 | return false; |
| 120 | |
| 121 | return true; |
| 122 | } |
| 123 | |
| 124 | static bool icm_copy(struct tb_cfg_request *req, const struct ctl_pkg *pkg) |
| 125 | { |
| 126 | const struct icm_pkg_header *hdr = pkg->buffer; |
| 127 | |
| 128 | if (hdr->packet_id < req->npackets) { |
| 129 | size_t offset = hdr->packet_id * req->response_size; |
| 130 | |
| 131 | memcpy(req->response + offset, pkg->buffer, req->response_size); |
| 132 | } |
| 133 | |
| 134 | return hdr->packet_id == hdr->total_packets - 1; |
| 135 | } |
| 136 | |
| 137 | static int icm_request(struct tb *tb, const void *request, size_t request_size, |
| 138 | void *response, size_t response_size, size_t npackets, |
| 139 | unsigned int timeout_msec) |
| 140 | { |
| 141 | struct icm *icm = tb_priv(tb); |
| 142 | int retries = 3; |
| 143 | |
| 144 | do { |
| 145 | struct tb_cfg_request *req; |
| 146 | struct tb_cfg_result res; |
| 147 | |
| 148 | req = tb_cfg_request_alloc(); |
| 149 | if (!req) |
| 150 | return -ENOMEM; |
| 151 | |
| 152 | req->match = icm_match; |
| 153 | req->copy = icm_copy; |
| 154 | req->request = request; |
| 155 | req->request_size = request_size; |
| 156 | req->request_type = TB_CFG_PKG_ICM_CMD; |
| 157 | req->response = response; |
| 158 | req->npackets = npackets; |
| 159 | req->response_size = response_size; |
| 160 | req->response_type = TB_CFG_PKG_ICM_RESP; |
| 161 | |
| 162 | mutex_lock(&icm->request_lock); |
| 163 | res = tb_cfg_request_sync(tb->ctl, req, timeout_msec); |
| 164 | mutex_unlock(&icm->request_lock); |
| 165 | |
| 166 | tb_cfg_request_put(req); |
| 167 | |
| 168 | if (res.err != -ETIMEDOUT) |
| 169 | return res.err == 1 ? -EIO : res.err; |
| 170 | |
| 171 | usleep_range(20, 50); |
| 172 | } while (retries--); |
| 173 | |
| 174 | return -ETIMEDOUT; |
| 175 | } |
| 176 | |
| 177 | static bool icm_fr_is_supported(struct tb *tb) |
| 178 | { |
| 179 | return !is_apple(); |
| 180 | } |
| 181 | |
| 182 | static inline int icm_fr_get_switch_index(u32 port) |
| 183 | { |
| 184 | int index; |
| 185 | |
| 186 | if ((port & ICM_PORT_TYPE_MASK) != TB_TYPE_PORT) |
| 187 | return 0; |
| 188 | |
| 189 | index = port >> ICM_PORT_INDEX_SHIFT; |
| 190 | return index != 0xff ? index : 0; |
| 191 | } |
| 192 | |
| 193 | static int icm_fr_get_route(struct tb *tb, u8 link, u8 depth, u64 *route) |
| 194 | { |
| 195 | struct icm_fr_pkg_get_topology_response *switches, *sw; |
| 196 | struct icm_fr_pkg_get_topology request = { |
| 197 | .hdr = { .code = ICM_GET_TOPOLOGY }, |
| 198 | }; |
| 199 | size_t npackets = ICM_GET_TOPOLOGY_PACKETS; |
| 200 | int ret, index; |
| 201 | u8 i; |
| 202 | |
| 203 | switches = kcalloc(npackets, sizeof(*switches), GFP_KERNEL); |
| 204 | if (!switches) |
| 205 | return -ENOMEM; |
| 206 | |
| 207 | ret = icm_request(tb, &request, sizeof(request), switches, |
| 208 | sizeof(*switches), npackets, ICM_TIMEOUT); |
| 209 | if (ret) |
| 210 | goto err_free; |
| 211 | |
| 212 | sw = &switches[0]; |
| 213 | index = icm_fr_get_switch_index(sw->ports[link]); |
| 214 | if (!index) { |
| 215 | ret = -ENODEV; |
| 216 | goto err_free; |
| 217 | } |
| 218 | |
| 219 | sw = &switches[index]; |
| 220 | for (i = 1; i < depth; i++) { |
| 221 | unsigned int j; |
| 222 | |
| 223 | if (!(sw->first_data & ICM_SWITCH_USED)) { |
| 224 | ret = -ENODEV; |
| 225 | goto err_free; |
| 226 | } |
| 227 | |
| 228 | for (j = 0; j < ARRAY_SIZE(sw->ports); j++) { |
| 229 | index = icm_fr_get_switch_index(sw->ports[j]); |
| 230 | if (index > sw->switch_index) { |
| 231 | sw = &switches[index]; |
| 232 | break; |
| 233 | } |
| 234 | } |
| 235 | } |
| 236 | |
| 237 | *route = get_route(sw->route_hi, sw->route_lo); |
| 238 | |
| 239 | err_free: |
| 240 | kfree(switches); |
| 241 | return ret; |
| 242 | } |
| 243 | |
| 244 | static int icm_fr_approve_switch(struct tb *tb, struct tb_switch *sw) |
| 245 | { |
| 246 | struct icm_fr_pkg_approve_device request; |
| 247 | struct icm_fr_pkg_approve_device reply; |
| 248 | int ret; |
| 249 | |
| 250 | memset(&request, 0, sizeof(request)); |
| 251 | memcpy(&request.ep_uuid, sw->uuid, sizeof(request.ep_uuid)); |
| 252 | request.hdr.code = ICM_APPROVE_DEVICE; |
| 253 | request.connection_id = sw->connection_id; |
| 254 | request.connection_key = sw->connection_key; |
| 255 | |
| 256 | memset(&reply, 0, sizeof(reply)); |
| 257 | /* Use larger timeout as establishing tunnels can take some time */ |
| 258 | ret = icm_request(tb, &request, sizeof(request), &reply, sizeof(reply), |
| 259 | 1, 10000); |
| 260 | if (ret) |
| 261 | return ret; |
| 262 | |
| 263 | if (reply.hdr.flags & ICM_FLAGS_ERROR) { |
| 264 | tb_warn(tb, "PCIe tunnel creation failed\n"); |
| 265 | return -EIO; |
| 266 | } |
| 267 | |
| 268 | return 0; |
| 269 | } |
| 270 | |
| 271 | static int icm_fr_add_switch_key(struct tb *tb, struct tb_switch *sw) |
| 272 | { |
| 273 | struct icm_fr_pkg_add_device_key request; |
| 274 | struct icm_fr_pkg_add_device_key_response reply; |
| 275 | int ret; |
| 276 | |
| 277 | memset(&request, 0, sizeof(request)); |
| 278 | memcpy(&request.ep_uuid, sw->uuid, sizeof(request.ep_uuid)); |
| 279 | request.hdr.code = ICM_ADD_DEVICE_KEY; |
| 280 | request.connection_id = sw->connection_id; |
| 281 | request.connection_key = sw->connection_key; |
| 282 | memcpy(request.key, sw->key, TB_SWITCH_KEY_SIZE); |
| 283 | |
| 284 | memset(&reply, 0, sizeof(reply)); |
| 285 | ret = icm_request(tb, &request, sizeof(request), &reply, sizeof(reply), |
| 286 | 1, ICM_TIMEOUT); |
| 287 | if (ret) |
| 288 | return ret; |
| 289 | |
| 290 | if (reply.hdr.flags & ICM_FLAGS_ERROR) { |
| 291 | tb_warn(tb, "Adding key to switch failed\n"); |
| 292 | return -EIO; |
| 293 | } |
| 294 | |
| 295 | return 0; |
| 296 | } |
| 297 | |
| 298 | static int icm_fr_challenge_switch_key(struct tb *tb, struct tb_switch *sw, |
| 299 | const u8 *challenge, u8 *response) |
| 300 | { |
| 301 | struct icm_fr_pkg_challenge_device request; |
| 302 | struct icm_fr_pkg_challenge_device_response reply; |
| 303 | int ret; |
| 304 | |
| 305 | memset(&request, 0, sizeof(request)); |
| 306 | memcpy(&request.ep_uuid, sw->uuid, sizeof(request.ep_uuid)); |
| 307 | request.hdr.code = ICM_CHALLENGE_DEVICE; |
| 308 | request.connection_id = sw->connection_id; |
| 309 | request.connection_key = sw->connection_key; |
| 310 | memcpy(request.challenge, challenge, TB_SWITCH_KEY_SIZE); |
| 311 | |
| 312 | memset(&reply, 0, sizeof(reply)); |
| 313 | ret = icm_request(tb, &request, sizeof(request), &reply, sizeof(reply), |
| 314 | 1, ICM_TIMEOUT); |
| 315 | if (ret) |
| 316 | return ret; |
| 317 | |
| 318 | if (reply.hdr.flags & ICM_FLAGS_ERROR) |
| 319 | return -EKEYREJECTED; |
| 320 | if (reply.hdr.flags & ICM_FLAGS_NO_KEY) |
| 321 | return -ENOKEY; |
| 322 | |
| 323 | memcpy(response, reply.response, TB_SWITCH_KEY_SIZE); |
| 324 | |
| 325 | return 0; |
| 326 | } |
| 327 | |
| 328 | static void remove_switch(struct tb_switch *sw) |
| 329 | { |
| 330 | struct tb_switch *parent_sw; |
| 331 | |
| 332 | parent_sw = tb_to_switch(sw->dev.parent); |
| 333 | tb_port_at(tb_route(sw), parent_sw)->remote = NULL; |
| 334 | tb_switch_remove(sw); |
| 335 | } |
| 336 | |
| 337 | static void |
| 338 | icm_fr_device_connected(struct tb *tb, const struct icm_pkg_header *hdr) |
| 339 | { |
| 340 | const struct icm_fr_event_device_connected *pkg = |
| 341 | (const struct icm_fr_event_device_connected *)hdr; |
| 342 | struct tb_switch *sw, *parent_sw; |
| 343 | struct icm *icm = tb_priv(tb); |
| 344 | bool authorized = false; |
| 345 | u8 link, depth; |
| 346 | u64 route; |
| 347 | int ret; |
| 348 | |
| 349 | link = pkg->link_info & ICM_LINK_INFO_LINK_MASK; |
| 350 | depth = (pkg->link_info & ICM_LINK_INFO_DEPTH_MASK) >> |
| 351 | ICM_LINK_INFO_DEPTH_SHIFT; |
| 352 | authorized = pkg->link_info & ICM_LINK_INFO_APPROVED; |
| 353 | |
| 354 | ret = icm->get_route(tb, link, depth, &route); |
| 355 | if (ret) { |
| 356 | tb_err(tb, "failed to find route string for switch at %u.%u\n", |
| 357 | link, depth); |
| 358 | return; |
| 359 | } |
| 360 | |
| 361 | sw = tb_switch_find_by_uuid(tb, &pkg->ep_uuid); |
| 362 | if (sw) { |
| 363 | u8 phy_port, sw_phy_port; |
| 364 | |
| 365 | parent_sw = tb_to_switch(sw->dev.parent); |
| 366 | sw_phy_port = phy_port_from_route(tb_route(sw), sw->depth); |
| 367 | phy_port = phy_port_from_route(route, depth); |
| 368 | |
| 369 | /* |
| 370 | * On resume ICM will send us connected events for the |
| 371 | * devices that still are present. However, that |
| 372 | * information might have changed for example by the |
| 373 | * fact that a switch on a dual-link connection might |
| 374 | * have been enumerated using the other link now. Make |
| 375 | * sure our book keeping matches that. |
| 376 | */ |
| 377 | if (sw->depth == depth && sw_phy_port == phy_port && |
| 378 | !!sw->authorized == authorized) { |
| 379 | tb_port_at(tb_route(sw), parent_sw)->remote = NULL; |
| 380 | tb_port_at(route, parent_sw)->remote = |
| 381 | tb_upstream_port(sw); |
| 382 | sw->config.route_hi = upper_32_bits(route); |
| 383 | sw->config.route_lo = lower_32_bits(route); |
| 384 | sw->connection_id = pkg->connection_id; |
| 385 | sw->connection_key = pkg->connection_key; |
| 386 | sw->link = link; |
| 387 | sw->depth = depth; |
| 388 | sw->is_unplugged = false; |
| 389 | tb_switch_put(sw); |
| 390 | return; |
| 391 | } |
| 392 | |
| 393 | /* |
| 394 | * User connected the same switch to another physical |
| 395 | * port or to another part of the topology. Remove the |
| 396 | * existing switch now before adding the new one. |
| 397 | */ |
| 398 | remove_switch(sw); |
| 399 | tb_switch_put(sw); |
| 400 | } |
| 401 | |
| 402 | /* |
| 403 | * If the switch was not found by UUID, look for a switch on |
| 404 | * same physical port (taking possible link aggregation into |
| 405 | * account) and depth. If we found one it is definitely a stale |
| 406 | * one so remove it first. |
| 407 | */ |
| 408 | sw = tb_switch_find_by_link_depth(tb, link, depth); |
| 409 | if (!sw) { |
| 410 | u8 dual_link; |
| 411 | |
| 412 | dual_link = dual_link_from_link(link); |
| 413 | if (dual_link) |
| 414 | sw = tb_switch_find_by_link_depth(tb, dual_link, depth); |
| 415 | } |
| 416 | if (sw) { |
| 417 | remove_switch(sw); |
| 418 | tb_switch_put(sw); |
| 419 | } |
| 420 | |
| 421 | parent_sw = tb_switch_find_by_link_depth(tb, link, depth - 1); |
| 422 | if (!parent_sw) { |
| 423 | tb_err(tb, "failed to find parent switch for %u.%u\n", |
| 424 | link, depth); |
| 425 | return; |
| 426 | } |
| 427 | |
| 428 | sw = tb_switch_alloc(tb, &parent_sw->dev, route); |
| 429 | if (!sw) { |
| 430 | tb_switch_put(parent_sw); |
| 431 | return; |
| 432 | } |
| 433 | |
| 434 | sw->uuid = kmemdup(&pkg->ep_uuid, sizeof(pkg->ep_uuid), GFP_KERNEL); |
| 435 | sw->connection_id = pkg->connection_id; |
| 436 | sw->connection_key = pkg->connection_key; |
| 437 | sw->link = link; |
| 438 | sw->depth = depth; |
| 439 | sw->authorized = authorized; |
| 440 | sw->security_level = (pkg->hdr.flags & ICM_FLAGS_SLEVEL_MASK) >> |
| 441 | ICM_FLAGS_SLEVEL_SHIFT; |
| 442 | |
| 443 | /* Link the two switches now */ |
| 444 | tb_port_at(route, parent_sw)->remote = tb_upstream_port(sw); |
| 445 | tb_upstream_port(sw)->remote = tb_port_at(route, parent_sw); |
| 446 | |
| 447 | ret = tb_switch_add(sw); |
| 448 | if (ret) { |
| 449 | tb_port_at(tb_route(sw), parent_sw)->remote = NULL; |
| 450 | tb_switch_put(sw); |
| 451 | } |
| 452 | tb_switch_put(parent_sw); |
| 453 | } |
| 454 | |
| 455 | static void |
| 456 | icm_fr_device_disconnected(struct tb *tb, const struct icm_pkg_header *hdr) |
| 457 | { |
| 458 | const struct icm_fr_event_device_disconnected *pkg = |
| 459 | (const struct icm_fr_event_device_disconnected *)hdr; |
| 460 | struct tb_switch *sw; |
| 461 | u8 link, depth; |
| 462 | |
| 463 | link = pkg->link_info & ICM_LINK_INFO_LINK_MASK; |
| 464 | depth = (pkg->link_info & ICM_LINK_INFO_DEPTH_MASK) >> |
| 465 | ICM_LINK_INFO_DEPTH_SHIFT; |
| 466 | |
| 467 | if (link > ICM_MAX_LINK || depth > ICM_MAX_DEPTH) { |
| 468 | tb_warn(tb, "invalid topology %u.%u, ignoring\n", link, depth); |
| 469 | return; |
| 470 | } |
| 471 | |
| 472 | sw = tb_switch_find_by_link_depth(tb, link, depth); |
| 473 | if (!sw) { |
| 474 | tb_warn(tb, "no switch exists at %u.%u, ignoring\n", link, |
| 475 | depth); |
| 476 | return; |
| 477 | } |
| 478 | |
| 479 | remove_switch(sw); |
| 480 | tb_switch_put(sw); |
| 481 | } |
| 482 | |
| 483 | static struct pci_dev *get_upstream_port(struct pci_dev *pdev) |
| 484 | { |
| 485 | struct pci_dev *parent; |
| 486 | |
| 487 | parent = pci_upstream_bridge(pdev); |
| 488 | while (parent) { |
| 489 | if (!pci_is_pcie(parent)) |
| 490 | return NULL; |
| 491 | if (pci_pcie_type(parent) == PCI_EXP_TYPE_UPSTREAM) |
| 492 | break; |
| 493 | parent = pci_upstream_bridge(parent); |
| 494 | } |
| 495 | |
| 496 | if (!parent) |
| 497 | return NULL; |
| 498 | |
| 499 | switch (parent->device) { |
| 500 | case PCI_DEVICE_ID_INTEL_ALPINE_RIDGE_2C_BRIDGE: |
| 501 | case PCI_DEVICE_ID_INTEL_ALPINE_RIDGE_4C_BRIDGE: |
| 502 | case PCI_DEVICE_ID_INTEL_ALPINE_RIDGE_LP_BRIDGE: |
| 503 | case PCI_DEVICE_ID_INTEL_ALPINE_RIDGE_C_4C_BRIDGE: |
| 504 | case PCI_DEVICE_ID_INTEL_ALPINE_RIDGE_C_2C_BRIDGE: |
| 505 | return parent; |
| 506 | } |
| 507 | |
| 508 | return NULL; |
| 509 | } |
| 510 | |
| 511 | static bool icm_ar_is_supported(struct tb *tb) |
| 512 | { |
| 513 | struct pci_dev *upstream_port; |
| 514 | struct icm *icm = tb_priv(tb); |
| 515 | |
| 516 | /* |
| 517 | * Starting from Alpine Ridge we can use ICM on Apple machines |
| 518 | * as well. We just need to reset and re-enable it first. |
| 519 | */ |
| 520 | if (!is_apple()) |
| 521 | return true; |
| 522 | |
| 523 | /* |
| 524 | * Find the upstream PCIe port in case we need to do reset |
| 525 | * through its vendor specific registers. |
| 526 | */ |
| 527 | upstream_port = get_upstream_port(tb->nhi->pdev); |
| 528 | if (upstream_port) { |
| 529 | int cap; |
| 530 | |
| 531 | cap = pci_find_ext_capability(upstream_port, |
| 532 | PCI_EXT_CAP_ID_VNDR); |
| 533 | if (cap > 0) { |
| 534 | icm->upstream_port = upstream_port; |
| 535 | icm->vnd_cap = cap; |
| 536 | |
| 537 | return true; |
| 538 | } |
| 539 | } |
| 540 | |
| 541 | return false; |
| 542 | } |
| 543 | |
| 544 | static int icm_ar_get_mode(struct tb *tb) |
| 545 | { |
| 546 | struct tb_nhi *nhi = tb->nhi; |
| 547 | int retries = 5; |
| 548 | u32 val; |
| 549 | |
| 550 | do { |
| 551 | val = ioread32(nhi->iobase + REG_FW_STS); |
| 552 | if (val & REG_FW_STS_NVM_AUTH_DONE) |
| 553 | break; |
| 554 | msleep(30); |
| 555 | } while (--retries); |
| 556 | |
| 557 | if (!retries) { |
| 558 | dev_err(&nhi->pdev->dev, "ICM firmware not authenticated\n"); |
| 559 | return -ENODEV; |
| 560 | } |
| 561 | |
| 562 | return nhi_mailbox_mode(nhi); |
| 563 | } |
| 564 | |
| 565 | static int icm_ar_get_route(struct tb *tb, u8 link, u8 depth, u64 *route) |
| 566 | { |
| 567 | struct icm_ar_pkg_get_route_response reply; |
| 568 | struct icm_ar_pkg_get_route request = { |
| 569 | .hdr = { .code = ICM_GET_ROUTE }, |
| 570 | .link_info = depth << ICM_LINK_INFO_DEPTH_SHIFT | link, |
| 571 | }; |
| 572 | int ret; |
| 573 | |
| 574 | memset(&reply, 0, sizeof(reply)); |
| 575 | ret = icm_request(tb, &request, sizeof(request), &reply, sizeof(reply), |
| 576 | 1, ICM_TIMEOUT); |
| 577 | if (ret) |
| 578 | return ret; |
| 579 | |
| 580 | if (reply.hdr.flags & ICM_FLAGS_ERROR) |
| 581 | return -EIO; |
| 582 | |
| 583 | *route = get_route(reply.route_hi, reply.route_lo); |
| 584 | return 0; |
| 585 | } |
| 586 | |
| 587 | static void icm_handle_notification(struct work_struct *work) |
| 588 | { |
| 589 | struct icm_notification *n = container_of(work, typeof(*n), work); |
| 590 | struct tb *tb = n->tb; |
| 591 | struct icm *icm = tb_priv(tb); |
| 592 | |
| 593 | mutex_lock(&tb->lock); |
| 594 | |
| 595 | switch (n->pkg->code) { |
| 596 | case ICM_EVENT_DEVICE_CONNECTED: |
| 597 | icm->device_connected(tb, n->pkg); |
| 598 | break; |
| 599 | case ICM_EVENT_DEVICE_DISCONNECTED: |
| 600 | icm->device_disconnected(tb, n->pkg); |
| 601 | break; |
| 602 | } |
| 603 | |
| 604 | mutex_unlock(&tb->lock); |
| 605 | |
| 606 | kfree(n->pkg); |
| 607 | kfree(n); |
| 608 | } |
| 609 | |
| 610 | static void icm_handle_event(struct tb *tb, enum tb_cfg_pkg_type type, |
| 611 | const void *buf, size_t size) |
| 612 | { |
| 613 | struct icm_notification *n; |
| 614 | |
| 615 | n = kmalloc(sizeof(*n), GFP_KERNEL); |
| 616 | if (!n) |
| 617 | return; |
| 618 | |
| 619 | INIT_WORK(&n->work, icm_handle_notification); |
| 620 | n->pkg = kmemdup(buf, size, GFP_KERNEL); |
| 621 | n->tb = tb; |
| 622 | |
| 623 | queue_work(tb->wq, &n->work); |
| 624 | } |
| 625 | |
| 626 | static int |
| 627 | __icm_driver_ready(struct tb *tb, enum tb_security_level *security_level) |
| 628 | { |
| 629 | struct icm_pkg_driver_ready_response reply; |
| 630 | struct icm_pkg_driver_ready request = { |
| 631 | .hdr.code = ICM_DRIVER_READY, |
| 632 | }; |
| 633 | unsigned int retries = 10; |
| 634 | int ret; |
| 635 | |
| 636 | memset(&reply, 0, sizeof(reply)); |
| 637 | ret = icm_request(tb, &request, sizeof(request), &reply, sizeof(reply), |
| 638 | 1, ICM_TIMEOUT); |
| 639 | if (ret) |
| 640 | return ret; |
| 641 | |
| 642 | if (security_level) |
| 643 | *security_level = reply.security_level & 0xf; |
| 644 | |
| 645 | /* |
| 646 | * Hold on here until the switch config space is accessible so |
| 647 | * that we can read root switch config successfully. |
| 648 | */ |
| 649 | do { |
| 650 | struct tb_cfg_result res; |
| 651 | u32 tmp; |
| 652 | |
| 653 | res = tb_cfg_read_raw(tb->ctl, &tmp, 0, 0, TB_CFG_SWITCH, |
| 654 | 0, 1, 100); |
| 655 | if (!res.err) |
| 656 | return 0; |
| 657 | |
| 658 | msleep(50); |
| 659 | } while (--retries); |
| 660 | |
| 661 | return -ETIMEDOUT; |
| 662 | } |
| 663 | |
| 664 | static int pci2cio_wait_completion(struct icm *icm, unsigned long timeout_msec) |
| 665 | { |
| 666 | unsigned long end = jiffies + msecs_to_jiffies(timeout_msec); |
| 667 | u32 cmd; |
| 668 | |
| 669 | do { |
| 670 | pci_read_config_dword(icm->upstream_port, |
| 671 | icm->vnd_cap + PCIE2CIO_CMD, &cmd); |
| 672 | if (!(cmd & PCIE2CIO_CMD_START)) { |
| 673 | if (cmd & PCIE2CIO_CMD_TIMEOUT) |
| 674 | break; |
| 675 | return 0; |
| 676 | } |
| 677 | |
| 678 | msleep(50); |
| 679 | } while (time_before(jiffies, end)); |
| 680 | |
| 681 | return -ETIMEDOUT; |
| 682 | } |
| 683 | |
| 684 | static int pcie2cio_read(struct icm *icm, enum tb_cfg_space cs, |
| 685 | unsigned int port, unsigned int index, u32 *data) |
| 686 | { |
| 687 | struct pci_dev *pdev = icm->upstream_port; |
| 688 | int ret, vnd_cap = icm->vnd_cap; |
| 689 | u32 cmd; |
| 690 | |
| 691 | cmd = index; |
| 692 | cmd |= (port << PCIE2CIO_CMD_PORT_SHIFT) & PCIE2CIO_CMD_PORT_MASK; |
| 693 | cmd |= (cs << PCIE2CIO_CMD_CS_SHIFT) & PCIE2CIO_CMD_CS_MASK; |
| 694 | cmd |= PCIE2CIO_CMD_START; |
| 695 | pci_write_config_dword(pdev, vnd_cap + PCIE2CIO_CMD, cmd); |
| 696 | |
| 697 | ret = pci2cio_wait_completion(icm, 5000); |
| 698 | if (ret) |
| 699 | return ret; |
| 700 | |
| 701 | pci_read_config_dword(pdev, vnd_cap + PCIE2CIO_RDDATA, data); |
| 702 | return 0; |
| 703 | } |
| 704 | |
| 705 | static int pcie2cio_write(struct icm *icm, enum tb_cfg_space cs, |
| 706 | unsigned int port, unsigned int index, u32 data) |
| 707 | { |
| 708 | struct pci_dev *pdev = icm->upstream_port; |
| 709 | int vnd_cap = icm->vnd_cap; |
| 710 | u32 cmd; |
| 711 | |
| 712 | pci_write_config_dword(pdev, vnd_cap + PCIE2CIO_WRDATA, data); |
| 713 | |
| 714 | cmd = index; |
| 715 | cmd |= (port << PCIE2CIO_CMD_PORT_SHIFT) & PCIE2CIO_CMD_PORT_MASK; |
| 716 | cmd |= (cs << PCIE2CIO_CMD_CS_SHIFT) & PCIE2CIO_CMD_CS_MASK; |
| 717 | cmd |= PCIE2CIO_CMD_WRITE | PCIE2CIO_CMD_START; |
| 718 | pci_write_config_dword(pdev, vnd_cap + PCIE2CIO_CMD, cmd); |
| 719 | |
| 720 | return pci2cio_wait_completion(icm, 5000); |
| 721 | } |
| 722 | |
| 723 | static int icm_firmware_reset(struct tb *tb, struct tb_nhi *nhi) |
| 724 | { |
| 725 | struct icm *icm = tb_priv(tb); |
| 726 | u32 val; |
| 727 | |
| 728 | /* Put ARC to wait for CIO reset event to happen */ |
| 729 | val = ioread32(nhi->iobase + REG_FW_STS); |
| 730 | val |= REG_FW_STS_CIO_RESET_REQ; |
| 731 | iowrite32(val, nhi->iobase + REG_FW_STS); |
| 732 | |
| 733 | /* Re-start ARC */ |
| 734 | val = ioread32(nhi->iobase + REG_FW_STS); |
| 735 | val |= REG_FW_STS_ICM_EN_INVERT; |
| 736 | val |= REG_FW_STS_ICM_EN_CPU; |
| 737 | iowrite32(val, nhi->iobase + REG_FW_STS); |
| 738 | |
| 739 | /* Trigger CIO reset now */ |
| 740 | return pcie2cio_write(icm, TB_CFG_SWITCH, 0, 0x50, BIT(9)); |
| 741 | } |
| 742 | |
| 743 | static int icm_firmware_start(struct tb *tb, struct tb_nhi *nhi) |
| 744 | { |
| 745 | unsigned int retries = 10; |
| 746 | int ret; |
| 747 | u32 val; |
| 748 | |
| 749 | /* Check if the ICM firmware is already running */ |
| 750 | val = ioread32(nhi->iobase + REG_FW_STS); |
| 751 | if (val & REG_FW_STS_ICM_EN) |
| 752 | return 0; |
| 753 | |
| 754 | dev_info(&nhi->pdev->dev, "starting ICM firmware\n"); |
| 755 | |
| 756 | ret = icm_firmware_reset(tb, nhi); |
| 757 | if (ret) |
| 758 | return ret; |
| 759 | |
| 760 | /* Wait until the ICM firmware tells us it is up and running */ |
| 761 | do { |
| 762 | /* Check that the ICM firmware is running */ |
| 763 | val = ioread32(nhi->iobase + REG_FW_STS); |
| 764 | if (val & REG_FW_STS_NVM_AUTH_DONE) |
| 765 | return 0; |
| 766 | |
| 767 | msleep(300); |
| 768 | } while (--retries); |
| 769 | |
| 770 | return -ETIMEDOUT; |
| 771 | } |
| 772 | |
| 773 | static int icm_reset_phy_port(struct tb *tb, int phy_port) |
| 774 | { |
| 775 | struct icm *icm = tb_priv(tb); |
| 776 | u32 state0, state1; |
| 777 | int port0, port1; |
| 778 | u32 val0, val1; |
| 779 | int ret; |
| 780 | |
| 781 | if (!icm->upstream_port) |
| 782 | return 0; |
| 783 | |
| 784 | if (phy_port) { |
| 785 | port0 = 3; |
| 786 | port1 = 4; |
| 787 | } else { |
| 788 | port0 = 1; |
| 789 | port1 = 2; |
| 790 | } |
| 791 | |
| 792 | /* |
| 793 | * Read link status of both null ports belonging to a single |
| 794 | * physical port. |
| 795 | */ |
| 796 | ret = pcie2cio_read(icm, TB_CFG_PORT, port0, PHY_PORT_CS1, &val0); |
| 797 | if (ret) |
| 798 | return ret; |
| 799 | ret = pcie2cio_read(icm, TB_CFG_PORT, port1, PHY_PORT_CS1, &val1); |
| 800 | if (ret) |
| 801 | return ret; |
| 802 | |
| 803 | state0 = val0 & PHY_PORT_CS1_LINK_STATE_MASK; |
| 804 | state0 >>= PHY_PORT_CS1_LINK_STATE_SHIFT; |
| 805 | state1 = val1 & PHY_PORT_CS1_LINK_STATE_MASK; |
| 806 | state1 >>= PHY_PORT_CS1_LINK_STATE_SHIFT; |
| 807 | |
| 808 | /* If they are both up we need to reset them now */ |
| 809 | if (state0 != TB_PORT_UP || state1 != TB_PORT_UP) |
| 810 | return 0; |
| 811 | |
| 812 | val0 |= PHY_PORT_CS1_LINK_DISABLE; |
| 813 | ret = pcie2cio_write(icm, TB_CFG_PORT, port0, PHY_PORT_CS1, val0); |
| 814 | if (ret) |
| 815 | return ret; |
| 816 | |
| 817 | val1 |= PHY_PORT_CS1_LINK_DISABLE; |
| 818 | ret = pcie2cio_write(icm, TB_CFG_PORT, port1, PHY_PORT_CS1, val1); |
| 819 | if (ret) |
| 820 | return ret; |
| 821 | |
| 822 | /* Wait a bit and then re-enable both ports */ |
| 823 | usleep_range(10, 100); |
| 824 | |
| 825 | ret = pcie2cio_read(icm, TB_CFG_PORT, port0, PHY_PORT_CS1, &val0); |
| 826 | if (ret) |
| 827 | return ret; |
| 828 | ret = pcie2cio_read(icm, TB_CFG_PORT, port1, PHY_PORT_CS1, &val1); |
| 829 | if (ret) |
| 830 | return ret; |
| 831 | |
| 832 | val0 &= ~PHY_PORT_CS1_LINK_DISABLE; |
| 833 | ret = pcie2cio_write(icm, TB_CFG_PORT, port0, PHY_PORT_CS1, val0); |
| 834 | if (ret) |
| 835 | return ret; |
| 836 | |
| 837 | val1 &= ~PHY_PORT_CS1_LINK_DISABLE; |
| 838 | return pcie2cio_write(icm, TB_CFG_PORT, port1, PHY_PORT_CS1, val1); |
| 839 | } |
| 840 | |
| 841 | static int icm_firmware_init(struct tb *tb) |
| 842 | { |
| 843 | struct icm *icm = tb_priv(tb); |
| 844 | struct tb_nhi *nhi = tb->nhi; |
| 845 | int ret; |
| 846 | |
| 847 | ret = icm_firmware_start(tb, nhi); |
| 848 | if (ret) { |
| 849 | dev_err(&nhi->pdev->dev, "could not start ICM firmware\n"); |
| 850 | return ret; |
| 851 | } |
| 852 | |
| 853 | if (icm->get_mode) { |
| 854 | ret = icm->get_mode(tb); |
| 855 | |
| 856 | switch (ret) { |
Mika Westerberg | e6b245c | 2017-06-06 15:25:17 +0300 | [diff] [blame^] | 857 | case NHI_FW_SAFE_MODE: |
| 858 | icm->safe_mode = true; |
| 859 | break; |
| 860 | |
Mika Westerberg | f67cf49 | 2017-06-06 15:25:16 +0300 | [diff] [blame] | 861 | case NHI_FW_CM_MODE: |
| 862 | /* Ask ICM to accept all Thunderbolt devices */ |
| 863 | nhi_mailbox_cmd(nhi, NHI_MAILBOX_ALLOW_ALL_DEVS, 0); |
| 864 | break; |
| 865 | |
| 866 | default: |
| 867 | tb_err(tb, "ICM firmware is in wrong mode: %u\n", ret); |
| 868 | return -ENODEV; |
| 869 | } |
| 870 | } |
| 871 | |
| 872 | /* |
| 873 | * Reset both physical ports if there is anything connected to |
| 874 | * them already. |
| 875 | */ |
| 876 | ret = icm_reset_phy_port(tb, 0); |
| 877 | if (ret) |
| 878 | dev_warn(&nhi->pdev->dev, "failed to reset links on port0\n"); |
| 879 | ret = icm_reset_phy_port(tb, 1); |
| 880 | if (ret) |
| 881 | dev_warn(&nhi->pdev->dev, "failed to reset links on port1\n"); |
| 882 | |
| 883 | return 0; |
| 884 | } |
| 885 | |
| 886 | static int icm_driver_ready(struct tb *tb) |
| 887 | { |
Mika Westerberg | e6b245c | 2017-06-06 15:25:17 +0300 | [diff] [blame^] | 888 | struct icm *icm = tb_priv(tb); |
Mika Westerberg | f67cf49 | 2017-06-06 15:25:16 +0300 | [diff] [blame] | 889 | int ret; |
| 890 | |
| 891 | ret = icm_firmware_init(tb); |
| 892 | if (ret) |
| 893 | return ret; |
| 894 | |
Mika Westerberg | e6b245c | 2017-06-06 15:25:17 +0300 | [diff] [blame^] | 895 | if (icm->safe_mode) { |
| 896 | tb_info(tb, "Thunderbolt host controller is in safe mode.\n"); |
| 897 | tb_info(tb, "You need to update NVM firmware of the controller before it can be used.\n"); |
| 898 | tb_info(tb, "For latest updates check https://thunderbolttechnology.net/updates.\n"); |
| 899 | return 0; |
| 900 | } |
| 901 | |
Mika Westerberg | f67cf49 | 2017-06-06 15:25:16 +0300 | [diff] [blame] | 902 | return __icm_driver_ready(tb, &tb->security_level); |
| 903 | } |
| 904 | |
| 905 | static int icm_suspend(struct tb *tb) |
| 906 | { |
| 907 | return nhi_mailbox_cmd(tb->nhi, NHI_MAILBOX_SAVE_DEVS, 0); |
| 908 | } |
| 909 | |
| 910 | /* |
| 911 | * Mark all switches (except root switch) below this one unplugged. ICM |
| 912 | * firmware will send us an updated list of switches after we have send |
| 913 | * it driver ready command. If a switch is not in that list it will be |
| 914 | * removed when we perform rescan. |
| 915 | */ |
| 916 | static void icm_unplug_children(struct tb_switch *sw) |
| 917 | { |
| 918 | unsigned int i; |
| 919 | |
| 920 | if (tb_route(sw)) |
| 921 | sw->is_unplugged = true; |
| 922 | |
| 923 | for (i = 1; i <= sw->config.max_port_number; i++) { |
| 924 | struct tb_port *port = &sw->ports[i]; |
| 925 | |
| 926 | if (tb_is_upstream_port(port)) |
| 927 | continue; |
| 928 | if (!port->remote) |
| 929 | continue; |
| 930 | |
| 931 | icm_unplug_children(port->remote->sw); |
| 932 | } |
| 933 | } |
| 934 | |
| 935 | static void icm_free_unplugged_children(struct tb_switch *sw) |
| 936 | { |
| 937 | unsigned int i; |
| 938 | |
| 939 | for (i = 1; i <= sw->config.max_port_number; i++) { |
| 940 | struct tb_port *port = &sw->ports[i]; |
| 941 | |
| 942 | if (tb_is_upstream_port(port)) |
| 943 | continue; |
| 944 | if (!port->remote) |
| 945 | continue; |
| 946 | |
| 947 | if (port->remote->sw->is_unplugged) { |
| 948 | tb_switch_remove(port->remote->sw); |
| 949 | port->remote = NULL; |
| 950 | } else { |
| 951 | icm_free_unplugged_children(port->remote->sw); |
| 952 | } |
| 953 | } |
| 954 | } |
| 955 | |
| 956 | static void icm_rescan_work(struct work_struct *work) |
| 957 | { |
| 958 | struct icm *icm = container_of(work, struct icm, rescan_work.work); |
| 959 | struct tb *tb = icm_to_tb(icm); |
| 960 | |
| 961 | mutex_lock(&tb->lock); |
| 962 | if (tb->root_switch) |
| 963 | icm_free_unplugged_children(tb->root_switch); |
| 964 | mutex_unlock(&tb->lock); |
| 965 | } |
| 966 | |
| 967 | static void icm_complete(struct tb *tb) |
| 968 | { |
| 969 | struct icm *icm = tb_priv(tb); |
| 970 | |
| 971 | if (tb->nhi->going_away) |
| 972 | return; |
| 973 | |
| 974 | icm_unplug_children(tb->root_switch); |
| 975 | |
| 976 | /* |
| 977 | * Now all existing children should be resumed, start events |
| 978 | * from ICM to get updated status. |
| 979 | */ |
| 980 | __icm_driver_ready(tb, NULL); |
| 981 | |
| 982 | /* |
| 983 | * We do not get notifications of devices that have been |
| 984 | * unplugged during suspend so schedule rescan to clean them up |
| 985 | * if any. |
| 986 | */ |
| 987 | queue_delayed_work(tb->wq, &icm->rescan_work, msecs_to_jiffies(500)); |
| 988 | } |
| 989 | |
| 990 | static int icm_start(struct tb *tb) |
| 991 | { |
Mika Westerberg | e6b245c | 2017-06-06 15:25:17 +0300 | [diff] [blame^] | 992 | struct icm *icm = tb_priv(tb); |
Mika Westerberg | f67cf49 | 2017-06-06 15:25:16 +0300 | [diff] [blame] | 993 | int ret; |
| 994 | |
Mika Westerberg | e6b245c | 2017-06-06 15:25:17 +0300 | [diff] [blame^] | 995 | if (icm->safe_mode) |
| 996 | tb->root_switch = tb_switch_alloc_safe_mode(tb, &tb->dev, 0); |
| 997 | else |
| 998 | tb->root_switch = tb_switch_alloc(tb, &tb->dev, 0); |
Mika Westerberg | f67cf49 | 2017-06-06 15:25:16 +0300 | [diff] [blame] | 999 | if (!tb->root_switch) |
| 1000 | return -ENODEV; |
| 1001 | |
Mika Westerberg | e6b245c | 2017-06-06 15:25:17 +0300 | [diff] [blame^] | 1002 | /* |
| 1003 | * NVM upgrade has not been tested on Apple systems and they |
| 1004 | * don't provide images publicly either. To be on the safe side |
| 1005 | * prevent root switch NVM upgrade on Macs for now. |
| 1006 | */ |
| 1007 | tb->root_switch->no_nvm_upgrade = is_apple(); |
| 1008 | |
Mika Westerberg | f67cf49 | 2017-06-06 15:25:16 +0300 | [diff] [blame] | 1009 | ret = tb_switch_add(tb->root_switch); |
| 1010 | if (ret) |
| 1011 | tb_switch_put(tb->root_switch); |
| 1012 | |
| 1013 | return ret; |
| 1014 | } |
| 1015 | |
| 1016 | static void icm_stop(struct tb *tb) |
| 1017 | { |
| 1018 | struct icm *icm = tb_priv(tb); |
| 1019 | |
| 1020 | cancel_delayed_work(&icm->rescan_work); |
| 1021 | tb_switch_remove(tb->root_switch); |
| 1022 | tb->root_switch = NULL; |
| 1023 | nhi_mailbox_cmd(tb->nhi, NHI_MAILBOX_DRV_UNLOADS, 0); |
| 1024 | } |
| 1025 | |
Mika Westerberg | e6b245c | 2017-06-06 15:25:17 +0300 | [diff] [blame^] | 1026 | static int icm_disconnect_pcie_paths(struct tb *tb) |
| 1027 | { |
| 1028 | return nhi_mailbox_cmd(tb->nhi, NHI_MAILBOX_DISCONNECT_PCIE_PATHS, 0); |
| 1029 | } |
| 1030 | |
Mika Westerberg | f67cf49 | 2017-06-06 15:25:16 +0300 | [diff] [blame] | 1031 | /* Falcon Ridge and Alpine Ridge */ |
| 1032 | static const struct tb_cm_ops icm_fr_ops = { |
| 1033 | .driver_ready = icm_driver_ready, |
| 1034 | .start = icm_start, |
| 1035 | .stop = icm_stop, |
| 1036 | .suspend = icm_suspend, |
| 1037 | .complete = icm_complete, |
| 1038 | .handle_event = icm_handle_event, |
| 1039 | .approve_switch = icm_fr_approve_switch, |
| 1040 | .add_switch_key = icm_fr_add_switch_key, |
| 1041 | .challenge_switch_key = icm_fr_challenge_switch_key, |
Mika Westerberg | e6b245c | 2017-06-06 15:25:17 +0300 | [diff] [blame^] | 1042 | .disconnect_pcie_paths = icm_disconnect_pcie_paths, |
Mika Westerberg | f67cf49 | 2017-06-06 15:25:16 +0300 | [diff] [blame] | 1043 | }; |
| 1044 | |
| 1045 | struct tb *icm_probe(struct tb_nhi *nhi) |
| 1046 | { |
| 1047 | struct icm *icm; |
| 1048 | struct tb *tb; |
| 1049 | |
| 1050 | tb = tb_domain_alloc(nhi, sizeof(struct icm)); |
| 1051 | if (!tb) |
| 1052 | return NULL; |
| 1053 | |
| 1054 | icm = tb_priv(tb); |
| 1055 | INIT_DELAYED_WORK(&icm->rescan_work, icm_rescan_work); |
| 1056 | mutex_init(&icm->request_lock); |
| 1057 | |
| 1058 | switch (nhi->pdev->device) { |
| 1059 | case PCI_DEVICE_ID_INTEL_FALCON_RIDGE_2C_NHI: |
| 1060 | case PCI_DEVICE_ID_INTEL_FALCON_RIDGE_4C_NHI: |
| 1061 | icm->is_supported = icm_fr_is_supported; |
| 1062 | icm->get_route = icm_fr_get_route; |
| 1063 | icm->device_connected = icm_fr_device_connected; |
| 1064 | icm->device_disconnected = icm_fr_device_disconnected; |
| 1065 | tb->cm_ops = &icm_fr_ops; |
| 1066 | break; |
| 1067 | |
| 1068 | case PCI_DEVICE_ID_INTEL_ALPINE_RIDGE_2C_NHI: |
| 1069 | case PCI_DEVICE_ID_INTEL_ALPINE_RIDGE_4C_NHI: |
| 1070 | case PCI_DEVICE_ID_INTEL_ALPINE_RIDGE_LP_NHI: |
| 1071 | case PCI_DEVICE_ID_INTEL_ALPINE_RIDGE_C_4C_NHI: |
| 1072 | case PCI_DEVICE_ID_INTEL_ALPINE_RIDGE_C_2C_NHI: |
| 1073 | icm->is_supported = icm_ar_is_supported; |
| 1074 | icm->get_mode = icm_ar_get_mode; |
| 1075 | icm->get_route = icm_ar_get_route; |
| 1076 | icm->device_connected = icm_fr_device_connected; |
| 1077 | icm->device_disconnected = icm_fr_device_disconnected; |
| 1078 | tb->cm_ops = &icm_fr_ops; |
| 1079 | break; |
| 1080 | } |
| 1081 | |
| 1082 | if (!icm->is_supported || !icm->is_supported(tb)) { |
| 1083 | dev_dbg(&nhi->pdev->dev, "ICM not supported on this controller\n"); |
| 1084 | tb_domain_put(tb); |
| 1085 | return NULL; |
| 1086 | } |
| 1087 | |
| 1088 | return tb; |
| 1089 | } |