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> |
Mika Westerberg | f67cf49 | 2017-06-06 15:25:16 +0300 | [diff] [blame] | 16 | #include <linux/mutex.h> |
| 17 | #include <linux/pci.h> |
Mika Westerberg | 2d8ff0b | 2018-07-25 11:48:39 +0300 | [diff] [blame] | 18 | #include <linux/pm_runtime.h> |
Lukas Wunner | 630b3af | 2017-08-01 14:10:41 +0200 | [diff] [blame] | 19 | #include <linux/platform_data/x86/apple.h> |
Mika Westerberg | f67cf49 | 2017-06-06 15:25:16 +0300 | [diff] [blame] | 20 | #include <linux/sizes.h> |
| 21 | #include <linux/slab.h> |
| 22 | #include <linux/workqueue.h> |
| 23 | |
| 24 | #include "ctl.h" |
| 25 | #include "nhi_regs.h" |
| 26 | #include "tb.h" |
| 27 | |
| 28 | #define PCIE2CIO_CMD 0x30 |
| 29 | #define PCIE2CIO_CMD_TIMEOUT BIT(31) |
| 30 | #define PCIE2CIO_CMD_START BIT(30) |
| 31 | #define PCIE2CIO_CMD_WRITE BIT(21) |
| 32 | #define PCIE2CIO_CMD_CS_MASK GENMASK(20, 19) |
| 33 | #define PCIE2CIO_CMD_CS_SHIFT 19 |
| 34 | #define PCIE2CIO_CMD_PORT_MASK GENMASK(18, 13) |
| 35 | #define PCIE2CIO_CMD_PORT_SHIFT 13 |
| 36 | |
| 37 | #define PCIE2CIO_WRDATA 0x34 |
| 38 | #define PCIE2CIO_RDDATA 0x38 |
| 39 | |
| 40 | #define PHY_PORT_CS1 0x37 |
| 41 | #define PHY_PORT_CS1_LINK_DISABLE BIT(14) |
| 42 | #define PHY_PORT_CS1_LINK_STATE_MASK GENMASK(29, 26) |
| 43 | #define PHY_PORT_CS1_LINK_STATE_SHIFT 26 |
| 44 | |
Mika Westerberg | 0b0a0bd | 2017-10-07 10:54:09 +0300 | [diff] [blame] | 45 | #define ICM_TIMEOUT 5000 /* ms */ |
| 46 | #define ICM_APPROVE_TIMEOUT 10000 /* ms */ |
Mika Westerberg | f67cf49 | 2017-06-06 15:25:16 +0300 | [diff] [blame] | 47 | #define ICM_MAX_LINK 4 |
| 48 | #define ICM_MAX_DEPTH 6 |
| 49 | |
| 50 | /** |
| 51 | * struct icm - Internal connection manager private data |
| 52 | * @request_lock: Makes sure only one message is send to ICM at time |
| 53 | * @rescan_work: Work used to rescan the surviving switches after resume |
| 54 | * @upstream_port: Pointer to the PCIe upstream port this host |
| 55 | * controller is connected. This is only set for systems |
| 56 | * where ICM needs to be started manually |
| 57 | * @vnd_cap: Vendor defined capability where PCIe2CIO mailbox resides |
| 58 | * (only set when @upstream_port is not %NULL) |
Mika Westerberg | e6b245c | 2017-06-06 15:25:17 +0300 | [diff] [blame] | 59 | * @safe_mode: ICM is in safe mode |
Mika Westerberg | 9aaa3b8 | 2018-01-21 12:08:04 +0200 | [diff] [blame] | 60 | * @max_boot_acl: Maximum number of preboot ACL entries (%0 if not supported) |
Mika Westerberg | 2d8ff0b | 2018-07-25 11:48:39 +0300 | [diff] [blame] | 61 | * @rpm: Does the controller support runtime PM (RTD3) |
Mika Westerberg | f67cf49 | 2017-06-06 15:25:16 +0300 | [diff] [blame] | 62 | * @is_supported: Checks if we can support ICM on this controller |
| 63 | * @get_mode: Read and return the ICM firmware mode (optional) |
| 64 | * @get_route: Find a route string for given switch |
Mika Westerberg | d04522fa | 2018-07-25 11:03:19 +0300 | [diff] [blame] | 65 | * @save_devices: Ask ICM to save devices to ACL when suspending (optional) |
Mika Westerberg | 3080e19 | 2017-10-06 18:14:13 +0300 | [diff] [blame] | 66 | * @driver_ready: Send driver ready message to ICM |
Mika Westerberg | f67cf49 | 2017-06-06 15:25:16 +0300 | [diff] [blame] | 67 | * @device_connected: Handle device connected ICM message |
| 68 | * @device_disconnected: Handle device disconnected ICM message |
Mika Westerberg | d1ff702 | 2017-10-02 13:38:34 +0300 | [diff] [blame] | 69 | * @xdomain_connected - Handle XDomain connected ICM message |
| 70 | * @xdomain_disconnected - Handle XDomain disconnected ICM message |
Mika Westerberg | f67cf49 | 2017-06-06 15:25:16 +0300 | [diff] [blame] | 71 | */ |
| 72 | struct icm { |
| 73 | struct mutex request_lock; |
| 74 | struct delayed_work rescan_work; |
| 75 | struct pci_dev *upstream_port; |
Mika Westerberg | 9aaa3b8 | 2018-01-21 12:08:04 +0200 | [diff] [blame] | 76 | size_t max_boot_acl; |
Mika Westerberg | f67cf49 | 2017-06-06 15:25:16 +0300 | [diff] [blame] | 77 | int vnd_cap; |
Mika Westerberg | e6b245c | 2017-06-06 15:25:17 +0300 | [diff] [blame] | 78 | bool safe_mode; |
Mika Westerberg | 2d8ff0b | 2018-07-25 11:48:39 +0300 | [diff] [blame] | 79 | bool rpm; |
Mika Westerberg | f67cf49 | 2017-06-06 15:25:16 +0300 | [diff] [blame] | 80 | bool (*is_supported)(struct tb *tb); |
| 81 | int (*get_mode)(struct tb *tb); |
| 82 | int (*get_route)(struct tb *tb, u8 link, u8 depth, u64 *route); |
Mika Westerberg | d04522fa | 2018-07-25 11:03:19 +0300 | [diff] [blame] | 83 | void (*save_devices)(struct tb *tb); |
Mika Westerberg | 3080e19 | 2017-10-06 18:14:13 +0300 | [diff] [blame] | 84 | int (*driver_ready)(struct tb *tb, |
Mika Westerberg | 9aaa3b8 | 2018-01-21 12:08:04 +0200 | [diff] [blame] | 85 | enum tb_security_level *security_level, |
Mika Westerberg | 2d8ff0b | 2018-07-25 11:48:39 +0300 | [diff] [blame] | 86 | size_t *nboot_acl, bool *rpm); |
Mika Westerberg | f67cf49 | 2017-06-06 15:25:16 +0300 | [diff] [blame] | 87 | void (*device_connected)(struct tb *tb, |
| 88 | const struct icm_pkg_header *hdr); |
| 89 | void (*device_disconnected)(struct tb *tb, |
| 90 | const struct icm_pkg_header *hdr); |
Mika Westerberg | d1ff702 | 2017-10-02 13:38:34 +0300 | [diff] [blame] | 91 | void (*xdomain_connected)(struct tb *tb, |
| 92 | const struct icm_pkg_header *hdr); |
| 93 | void (*xdomain_disconnected)(struct tb *tb, |
| 94 | const struct icm_pkg_header *hdr); |
Mika Westerberg | f67cf49 | 2017-06-06 15:25:16 +0300 | [diff] [blame] | 95 | }; |
| 96 | |
| 97 | struct icm_notification { |
| 98 | struct work_struct work; |
| 99 | struct icm_pkg_header *pkg; |
| 100 | struct tb *tb; |
| 101 | }; |
| 102 | |
Mika Westerberg | 2d8ff0b | 2018-07-25 11:48:39 +0300 | [diff] [blame] | 103 | struct ep_name_entry { |
| 104 | u8 len; |
| 105 | u8 type; |
| 106 | u8 data[0]; |
| 107 | }; |
| 108 | |
| 109 | #define EP_NAME_INTEL_VSS 0x10 |
| 110 | |
| 111 | /* Intel Vendor specific structure */ |
| 112 | struct intel_vss { |
| 113 | u16 vendor; |
| 114 | u16 model; |
| 115 | u8 mc; |
| 116 | u8 flags; |
| 117 | u16 pci_devid; |
| 118 | u32 nvm_version; |
| 119 | }; |
| 120 | |
| 121 | #define INTEL_VSS_FLAGS_RTD3 BIT(0) |
| 122 | |
| 123 | static const struct intel_vss *parse_intel_vss(const void *ep_name, size_t size) |
| 124 | { |
| 125 | const void *end = ep_name + size; |
| 126 | |
| 127 | while (ep_name < end) { |
| 128 | const struct ep_name_entry *ep = ep_name; |
| 129 | |
| 130 | if (!ep->len) |
| 131 | break; |
| 132 | if (ep_name + ep->len > end) |
| 133 | break; |
| 134 | |
| 135 | if (ep->type == EP_NAME_INTEL_VSS) |
| 136 | return (const struct intel_vss *)ep->data; |
| 137 | |
| 138 | ep_name += ep->len; |
| 139 | } |
| 140 | |
| 141 | return NULL; |
| 142 | } |
| 143 | |
Mika Westerberg | f67cf49 | 2017-06-06 15:25:16 +0300 | [diff] [blame] | 144 | static inline struct tb *icm_to_tb(struct icm *icm) |
| 145 | { |
| 146 | return ((void *)icm - sizeof(struct tb)); |
| 147 | } |
| 148 | |
| 149 | static inline u8 phy_port_from_route(u64 route, u8 depth) |
| 150 | { |
Mika Westerberg | d1ff702 | 2017-10-02 13:38:34 +0300 | [diff] [blame] | 151 | u8 link; |
| 152 | |
| 153 | link = depth ? route >> ((depth - 1) * 8) : route; |
| 154 | return tb_phy_port_from_link(link); |
Mika Westerberg | f67cf49 | 2017-06-06 15:25:16 +0300 | [diff] [blame] | 155 | } |
| 156 | |
| 157 | static inline u8 dual_link_from_link(u8 link) |
| 158 | { |
| 159 | return link ? ((link - 1) ^ 0x01) + 1 : 0; |
| 160 | } |
| 161 | |
| 162 | static inline u64 get_route(u32 route_hi, u32 route_lo) |
| 163 | { |
| 164 | return (u64)route_hi << 32 | route_lo; |
| 165 | } |
| 166 | |
Radion Mirchevsky | 4bac471 | 2017-10-04 16:43:43 +0300 | [diff] [blame] | 167 | static inline u64 get_parent_route(u64 route) |
| 168 | { |
| 169 | int depth = tb_route_length(route); |
| 170 | return depth ? route & ~(0xffULL << (depth - 1) * TB_ROUTE_SHIFT) : 0; |
| 171 | } |
| 172 | |
Mika Westerberg | f67cf49 | 2017-06-06 15:25:16 +0300 | [diff] [blame] | 173 | static bool icm_match(const struct tb_cfg_request *req, |
| 174 | const struct ctl_pkg *pkg) |
| 175 | { |
| 176 | const struct icm_pkg_header *res_hdr = pkg->buffer; |
| 177 | const struct icm_pkg_header *req_hdr = req->request; |
| 178 | |
| 179 | if (pkg->frame.eof != req->response_type) |
| 180 | return false; |
| 181 | if (res_hdr->code != req_hdr->code) |
| 182 | return false; |
| 183 | |
| 184 | return true; |
| 185 | } |
| 186 | |
| 187 | static bool icm_copy(struct tb_cfg_request *req, const struct ctl_pkg *pkg) |
| 188 | { |
| 189 | const struct icm_pkg_header *hdr = pkg->buffer; |
| 190 | |
| 191 | if (hdr->packet_id < req->npackets) { |
| 192 | size_t offset = hdr->packet_id * req->response_size; |
| 193 | |
| 194 | memcpy(req->response + offset, pkg->buffer, req->response_size); |
| 195 | } |
| 196 | |
| 197 | return hdr->packet_id == hdr->total_packets - 1; |
| 198 | } |
| 199 | |
| 200 | static int icm_request(struct tb *tb, const void *request, size_t request_size, |
| 201 | void *response, size_t response_size, size_t npackets, |
| 202 | unsigned int timeout_msec) |
| 203 | { |
| 204 | struct icm *icm = tb_priv(tb); |
| 205 | int retries = 3; |
| 206 | |
| 207 | do { |
| 208 | struct tb_cfg_request *req; |
| 209 | struct tb_cfg_result res; |
| 210 | |
| 211 | req = tb_cfg_request_alloc(); |
| 212 | if (!req) |
| 213 | return -ENOMEM; |
| 214 | |
| 215 | req->match = icm_match; |
| 216 | req->copy = icm_copy; |
| 217 | req->request = request; |
| 218 | req->request_size = request_size; |
| 219 | req->request_type = TB_CFG_PKG_ICM_CMD; |
| 220 | req->response = response; |
| 221 | req->npackets = npackets; |
| 222 | req->response_size = response_size; |
| 223 | req->response_type = TB_CFG_PKG_ICM_RESP; |
| 224 | |
| 225 | mutex_lock(&icm->request_lock); |
| 226 | res = tb_cfg_request_sync(tb->ctl, req, timeout_msec); |
| 227 | mutex_unlock(&icm->request_lock); |
| 228 | |
| 229 | tb_cfg_request_put(req); |
| 230 | |
| 231 | if (res.err != -ETIMEDOUT) |
| 232 | return res.err == 1 ? -EIO : res.err; |
| 233 | |
| 234 | usleep_range(20, 50); |
| 235 | } while (retries--); |
| 236 | |
| 237 | return -ETIMEDOUT; |
| 238 | } |
| 239 | |
| 240 | static bool icm_fr_is_supported(struct tb *tb) |
| 241 | { |
Lukas Wunner | 630b3af | 2017-08-01 14:10:41 +0200 | [diff] [blame] | 242 | return !x86_apple_machine; |
Mika Westerberg | f67cf49 | 2017-06-06 15:25:16 +0300 | [diff] [blame] | 243 | } |
| 244 | |
| 245 | static inline int icm_fr_get_switch_index(u32 port) |
| 246 | { |
| 247 | int index; |
| 248 | |
| 249 | if ((port & ICM_PORT_TYPE_MASK) != TB_TYPE_PORT) |
| 250 | return 0; |
| 251 | |
| 252 | index = port >> ICM_PORT_INDEX_SHIFT; |
| 253 | return index != 0xff ? index : 0; |
| 254 | } |
| 255 | |
| 256 | static int icm_fr_get_route(struct tb *tb, u8 link, u8 depth, u64 *route) |
| 257 | { |
| 258 | struct icm_fr_pkg_get_topology_response *switches, *sw; |
| 259 | struct icm_fr_pkg_get_topology request = { |
| 260 | .hdr = { .code = ICM_GET_TOPOLOGY }, |
| 261 | }; |
| 262 | size_t npackets = ICM_GET_TOPOLOGY_PACKETS; |
| 263 | int ret, index; |
| 264 | u8 i; |
| 265 | |
| 266 | switches = kcalloc(npackets, sizeof(*switches), GFP_KERNEL); |
| 267 | if (!switches) |
| 268 | return -ENOMEM; |
| 269 | |
| 270 | ret = icm_request(tb, &request, sizeof(request), switches, |
| 271 | sizeof(*switches), npackets, ICM_TIMEOUT); |
| 272 | if (ret) |
| 273 | goto err_free; |
| 274 | |
| 275 | sw = &switches[0]; |
| 276 | index = icm_fr_get_switch_index(sw->ports[link]); |
| 277 | if (!index) { |
| 278 | ret = -ENODEV; |
| 279 | goto err_free; |
| 280 | } |
| 281 | |
| 282 | sw = &switches[index]; |
| 283 | for (i = 1; i < depth; i++) { |
| 284 | unsigned int j; |
| 285 | |
| 286 | if (!(sw->first_data & ICM_SWITCH_USED)) { |
| 287 | ret = -ENODEV; |
| 288 | goto err_free; |
| 289 | } |
| 290 | |
| 291 | for (j = 0; j < ARRAY_SIZE(sw->ports); j++) { |
| 292 | index = icm_fr_get_switch_index(sw->ports[j]); |
| 293 | if (index > sw->switch_index) { |
| 294 | sw = &switches[index]; |
| 295 | break; |
| 296 | } |
| 297 | } |
| 298 | } |
| 299 | |
| 300 | *route = get_route(sw->route_hi, sw->route_lo); |
| 301 | |
| 302 | err_free: |
| 303 | kfree(switches); |
| 304 | return ret; |
| 305 | } |
| 306 | |
Mika Westerberg | d04522fa | 2018-07-25 11:03:19 +0300 | [diff] [blame] | 307 | static void icm_fr_save_devices(struct tb *tb) |
| 308 | { |
| 309 | nhi_mailbox_cmd(tb->nhi, NHI_MAILBOX_SAVE_DEVS, 0); |
| 310 | } |
| 311 | |
Mika Westerberg | 3080e19 | 2017-10-06 18:14:13 +0300 | [diff] [blame] | 312 | static int |
Mika Westerberg | 9aaa3b8 | 2018-01-21 12:08:04 +0200 | [diff] [blame] | 313 | icm_fr_driver_ready(struct tb *tb, enum tb_security_level *security_level, |
Mika Westerberg | 2d8ff0b | 2018-07-25 11:48:39 +0300 | [diff] [blame] | 314 | size_t *nboot_acl, bool *rpm) |
Mika Westerberg | 3080e19 | 2017-10-06 18:14:13 +0300 | [diff] [blame] | 315 | { |
| 316 | struct icm_fr_pkg_driver_ready_response reply; |
| 317 | struct icm_pkg_driver_ready request = { |
| 318 | .hdr.code = ICM_DRIVER_READY, |
| 319 | }; |
| 320 | int ret; |
| 321 | |
| 322 | memset(&reply, 0, sizeof(reply)); |
| 323 | ret = icm_request(tb, &request, sizeof(request), &reply, sizeof(reply), |
| 324 | 1, ICM_TIMEOUT); |
| 325 | if (ret) |
| 326 | return ret; |
| 327 | |
| 328 | if (security_level) |
| 329 | *security_level = reply.security_level & ICM_FR_SLEVEL_MASK; |
| 330 | |
| 331 | return 0; |
| 332 | } |
| 333 | |
Mika Westerberg | f67cf49 | 2017-06-06 15:25:16 +0300 | [diff] [blame] | 334 | static int icm_fr_approve_switch(struct tb *tb, struct tb_switch *sw) |
| 335 | { |
| 336 | struct icm_fr_pkg_approve_device request; |
| 337 | struct icm_fr_pkg_approve_device reply; |
| 338 | int ret; |
| 339 | |
| 340 | memset(&request, 0, sizeof(request)); |
| 341 | memcpy(&request.ep_uuid, sw->uuid, sizeof(request.ep_uuid)); |
| 342 | request.hdr.code = ICM_APPROVE_DEVICE; |
| 343 | request.connection_id = sw->connection_id; |
| 344 | request.connection_key = sw->connection_key; |
| 345 | |
| 346 | memset(&reply, 0, sizeof(reply)); |
| 347 | /* Use larger timeout as establishing tunnels can take some time */ |
| 348 | ret = icm_request(tb, &request, sizeof(request), &reply, sizeof(reply), |
Mika Westerberg | 0b0a0bd | 2017-10-07 10:54:09 +0300 | [diff] [blame] | 349 | 1, ICM_APPROVE_TIMEOUT); |
Mika Westerberg | f67cf49 | 2017-06-06 15:25:16 +0300 | [diff] [blame] | 350 | if (ret) |
| 351 | return ret; |
| 352 | |
| 353 | if (reply.hdr.flags & ICM_FLAGS_ERROR) { |
| 354 | tb_warn(tb, "PCIe tunnel creation failed\n"); |
| 355 | return -EIO; |
| 356 | } |
| 357 | |
| 358 | return 0; |
| 359 | } |
| 360 | |
| 361 | static int icm_fr_add_switch_key(struct tb *tb, struct tb_switch *sw) |
| 362 | { |
| 363 | struct icm_fr_pkg_add_device_key request; |
| 364 | struct icm_fr_pkg_add_device_key_response reply; |
| 365 | int ret; |
| 366 | |
| 367 | memset(&request, 0, sizeof(request)); |
| 368 | memcpy(&request.ep_uuid, sw->uuid, sizeof(request.ep_uuid)); |
| 369 | request.hdr.code = ICM_ADD_DEVICE_KEY; |
| 370 | request.connection_id = sw->connection_id; |
| 371 | request.connection_key = sw->connection_key; |
| 372 | memcpy(request.key, sw->key, TB_SWITCH_KEY_SIZE); |
| 373 | |
| 374 | memset(&reply, 0, sizeof(reply)); |
| 375 | ret = icm_request(tb, &request, sizeof(request), &reply, sizeof(reply), |
| 376 | 1, ICM_TIMEOUT); |
| 377 | if (ret) |
| 378 | return ret; |
| 379 | |
| 380 | if (reply.hdr.flags & ICM_FLAGS_ERROR) { |
| 381 | tb_warn(tb, "Adding key to switch failed\n"); |
| 382 | return -EIO; |
| 383 | } |
| 384 | |
| 385 | return 0; |
| 386 | } |
| 387 | |
| 388 | static int icm_fr_challenge_switch_key(struct tb *tb, struct tb_switch *sw, |
| 389 | const u8 *challenge, u8 *response) |
| 390 | { |
| 391 | struct icm_fr_pkg_challenge_device request; |
| 392 | struct icm_fr_pkg_challenge_device_response reply; |
| 393 | int ret; |
| 394 | |
| 395 | memset(&request, 0, sizeof(request)); |
| 396 | memcpy(&request.ep_uuid, sw->uuid, sizeof(request.ep_uuid)); |
| 397 | request.hdr.code = ICM_CHALLENGE_DEVICE; |
| 398 | request.connection_id = sw->connection_id; |
| 399 | request.connection_key = sw->connection_key; |
| 400 | memcpy(request.challenge, challenge, TB_SWITCH_KEY_SIZE); |
| 401 | |
| 402 | memset(&reply, 0, sizeof(reply)); |
| 403 | ret = icm_request(tb, &request, sizeof(request), &reply, sizeof(reply), |
| 404 | 1, ICM_TIMEOUT); |
| 405 | if (ret) |
| 406 | return ret; |
| 407 | |
| 408 | if (reply.hdr.flags & ICM_FLAGS_ERROR) |
| 409 | return -EKEYREJECTED; |
| 410 | if (reply.hdr.flags & ICM_FLAGS_NO_KEY) |
| 411 | return -ENOKEY; |
| 412 | |
| 413 | memcpy(response, reply.response, TB_SWITCH_KEY_SIZE); |
| 414 | |
| 415 | return 0; |
| 416 | } |
| 417 | |
Mika Westerberg | d1ff702 | 2017-10-02 13:38:34 +0300 | [diff] [blame] | 418 | static int icm_fr_approve_xdomain_paths(struct tb *tb, struct tb_xdomain *xd) |
| 419 | { |
| 420 | struct icm_fr_pkg_approve_xdomain_response reply; |
| 421 | struct icm_fr_pkg_approve_xdomain request; |
| 422 | int ret; |
| 423 | |
| 424 | memset(&request, 0, sizeof(request)); |
| 425 | request.hdr.code = ICM_APPROVE_XDOMAIN; |
| 426 | request.link_info = xd->depth << ICM_LINK_INFO_DEPTH_SHIFT | xd->link; |
| 427 | memcpy(&request.remote_uuid, xd->remote_uuid, sizeof(*xd->remote_uuid)); |
| 428 | |
| 429 | request.transmit_path = xd->transmit_path; |
| 430 | request.transmit_ring = xd->transmit_ring; |
| 431 | request.receive_path = xd->receive_path; |
| 432 | request.receive_ring = xd->receive_ring; |
| 433 | |
| 434 | memset(&reply, 0, sizeof(reply)); |
| 435 | ret = icm_request(tb, &request, sizeof(request), &reply, sizeof(reply), |
| 436 | 1, ICM_TIMEOUT); |
| 437 | if (ret) |
| 438 | return ret; |
| 439 | |
| 440 | if (reply.hdr.flags & ICM_FLAGS_ERROR) |
| 441 | return -EIO; |
| 442 | |
| 443 | return 0; |
| 444 | } |
| 445 | |
| 446 | static int icm_fr_disconnect_xdomain_paths(struct tb *tb, struct tb_xdomain *xd) |
| 447 | { |
| 448 | u8 phy_port; |
| 449 | u8 cmd; |
| 450 | |
| 451 | phy_port = tb_phy_port_from_link(xd->link); |
| 452 | if (phy_port == 0) |
| 453 | cmd = NHI_MAILBOX_DISCONNECT_PA; |
| 454 | else |
| 455 | cmd = NHI_MAILBOX_DISCONNECT_PB; |
| 456 | |
| 457 | nhi_mailbox_cmd(tb->nhi, cmd, 1); |
| 458 | usleep_range(10, 50); |
| 459 | nhi_mailbox_cmd(tb->nhi, cmd, 2); |
| 460 | return 0; |
| 461 | } |
| 462 | |
Mika Westerberg | ee487dd | 2017-10-04 14:42:20 +0300 | [diff] [blame] | 463 | static void add_switch(struct tb_switch *parent_sw, u64 route, |
Mika Westerberg | 2d8ff0b | 2018-07-25 11:48:39 +0300 | [diff] [blame] | 464 | const uuid_t *uuid, const u8 *ep_name, |
| 465 | size_t ep_name_size, u8 connection_id, u8 connection_key, |
Mika Westerberg | ee487dd | 2017-10-04 14:42:20 +0300 | [diff] [blame] | 466 | u8 link, u8 depth, enum tb_security_level security_level, |
Yehezkel Bernat | 14862ee | 2018-01-22 12:50:09 +0200 | [diff] [blame] | 467 | bool authorized, bool boot) |
Mika Westerberg | ee487dd | 2017-10-04 14:42:20 +0300 | [diff] [blame] | 468 | { |
Mika Westerberg | 2d8ff0b | 2018-07-25 11:48:39 +0300 | [diff] [blame] | 469 | const struct intel_vss *vss; |
Mika Westerberg | ee487dd | 2017-10-04 14:42:20 +0300 | [diff] [blame] | 470 | struct tb_switch *sw; |
| 471 | |
Mika Westerberg | 2d8ff0b | 2018-07-25 11:48:39 +0300 | [diff] [blame] | 472 | pm_runtime_get_sync(&parent_sw->dev); |
| 473 | |
Mika Westerberg | ee487dd | 2017-10-04 14:42:20 +0300 | [diff] [blame] | 474 | sw = tb_switch_alloc(parent_sw->tb, &parent_sw->dev, route); |
| 475 | if (!sw) |
Mika Westerberg | 2d8ff0b | 2018-07-25 11:48:39 +0300 | [diff] [blame] | 476 | goto out; |
Mika Westerberg | ee487dd | 2017-10-04 14:42:20 +0300 | [diff] [blame] | 477 | |
| 478 | sw->uuid = kmemdup(uuid, sizeof(*uuid), GFP_KERNEL); |
Aditya Pakki | ee40c8a | 2019-03-25 16:25:22 -0500 | [diff] [blame] | 479 | if (!sw->uuid) { |
| 480 | tb_sw_warn(sw, "cannot allocate memory for switch\n"); |
| 481 | tb_switch_put(sw); |
| 482 | goto out; |
| 483 | } |
Mika Westerberg | ee487dd | 2017-10-04 14:42:20 +0300 | [diff] [blame] | 484 | sw->connection_id = connection_id; |
| 485 | sw->connection_key = connection_key; |
| 486 | sw->link = link; |
| 487 | sw->depth = depth; |
| 488 | sw->authorized = authorized; |
| 489 | sw->security_level = security_level; |
Yehezkel Bernat | 14862ee | 2018-01-22 12:50:09 +0200 | [diff] [blame] | 490 | sw->boot = boot; |
Mika Westerberg | ee487dd | 2017-10-04 14:42:20 +0300 | [diff] [blame] | 491 | |
Mika Westerberg | 2d8ff0b | 2018-07-25 11:48:39 +0300 | [diff] [blame] | 492 | vss = parse_intel_vss(ep_name, ep_name_size); |
| 493 | if (vss) |
| 494 | sw->rpm = !!(vss->flags & INTEL_VSS_FLAGS_RTD3); |
| 495 | |
Mika Westerberg | ee487dd | 2017-10-04 14:42:20 +0300 | [diff] [blame] | 496 | /* Link the two switches now */ |
| 497 | tb_port_at(route, parent_sw)->remote = tb_upstream_port(sw); |
| 498 | tb_upstream_port(sw)->remote = tb_port_at(route, parent_sw); |
| 499 | |
| 500 | if (tb_switch_add(sw)) { |
| 501 | tb_port_at(tb_route(sw), parent_sw)->remote = NULL; |
| 502 | tb_switch_put(sw); |
Mika Westerberg | ee487dd | 2017-10-04 14:42:20 +0300 | [diff] [blame] | 503 | } |
Mika Westerberg | 2d8ff0b | 2018-07-25 11:48:39 +0300 | [diff] [blame] | 504 | |
| 505 | out: |
| 506 | pm_runtime_mark_last_busy(&parent_sw->dev); |
| 507 | pm_runtime_put_autosuspend(&parent_sw->dev); |
Mika Westerberg | ee487dd | 2017-10-04 14:42:20 +0300 | [diff] [blame] | 508 | } |
| 509 | |
| 510 | static void update_switch(struct tb_switch *parent_sw, struct tb_switch *sw, |
| 511 | u64 route, u8 connection_id, u8 connection_key, |
Yehezkel Bernat | 14862ee | 2018-01-22 12:50:09 +0200 | [diff] [blame] | 512 | u8 link, u8 depth, bool boot) |
Mika Westerberg | ee487dd | 2017-10-04 14:42:20 +0300 | [diff] [blame] | 513 | { |
| 514 | /* Disconnect from parent */ |
| 515 | tb_port_at(tb_route(sw), parent_sw)->remote = NULL; |
| 516 | /* Re-connect via updated port*/ |
| 517 | tb_port_at(route, parent_sw)->remote = tb_upstream_port(sw); |
| 518 | |
| 519 | /* Update with the new addressing information */ |
| 520 | sw->config.route_hi = upper_32_bits(route); |
| 521 | sw->config.route_lo = lower_32_bits(route); |
| 522 | sw->connection_id = connection_id; |
| 523 | sw->connection_key = connection_key; |
| 524 | sw->link = link; |
| 525 | sw->depth = depth; |
Yehezkel Bernat | 14862ee | 2018-01-22 12:50:09 +0200 | [diff] [blame] | 526 | sw->boot = boot; |
Mika Westerberg | ee487dd | 2017-10-04 14:42:20 +0300 | [diff] [blame] | 527 | |
| 528 | /* This switch still exists */ |
| 529 | sw->is_unplugged = false; |
| 530 | } |
| 531 | |
Mika Westerberg | f67cf49 | 2017-06-06 15:25:16 +0300 | [diff] [blame] | 532 | static void remove_switch(struct tb_switch *sw) |
| 533 | { |
| 534 | struct tb_switch *parent_sw; |
| 535 | |
| 536 | parent_sw = tb_to_switch(sw->dev.parent); |
| 537 | tb_port_at(tb_route(sw), parent_sw)->remote = NULL; |
| 538 | tb_switch_remove(sw); |
| 539 | } |
| 540 | |
Mika Westerberg | ee487dd | 2017-10-04 14:42:20 +0300 | [diff] [blame] | 541 | static void add_xdomain(struct tb_switch *sw, u64 route, |
| 542 | const uuid_t *local_uuid, const uuid_t *remote_uuid, |
| 543 | u8 link, u8 depth) |
| 544 | { |
| 545 | struct tb_xdomain *xd; |
| 546 | |
Mika Westerberg | 2d8ff0b | 2018-07-25 11:48:39 +0300 | [diff] [blame] | 547 | pm_runtime_get_sync(&sw->dev); |
| 548 | |
Mika Westerberg | ee487dd | 2017-10-04 14:42:20 +0300 | [diff] [blame] | 549 | xd = tb_xdomain_alloc(sw->tb, &sw->dev, route, local_uuid, remote_uuid); |
| 550 | if (!xd) |
Mika Westerberg | 2d8ff0b | 2018-07-25 11:48:39 +0300 | [diff] [blame] | 551 | goto out; |
Mika Westerberg | ee487dd | 2017-10-04 14:42:20 +0300 | [diff] [blame] | 552 | |
| 553 | xd->link = link; |
| 554 | xd->depth = depth; |
| 555 | |
| 556 | tb_port_at(route, sw)->xdomain = xd; |
| 557 | |
| 558 | tb_xdomain_add(xd); |
Mika Westerberg | 2d8ff0b | 2018-07-25 11:48:39 +0300 | [diff] [blame] | 559 | |
| 560 | out: |
| 561 | pm_runtime_mark_last_busy(&sw->dev); |
| 562 | pm_runtime_put_autosuspend(&sw->dev); |
Mika Westerberg | ee487dd | 2017-10-04 14:42:20 +0300 | [diff] [blame] | 563 | } |
| 564 | |
| 565 | static void update_xdomain(struct tb_xdomain *xd, u64 route, u8 link) |
| 566 | { |
| 567 | xd->link = link; |
| 568 | xd->route = route; |
| 569 | xd->is_unplugged = false; |
| 570 | } |
| 571 | |
Mika Westerberg | 79fae98 | 2018-02-09 17:29:38 +0300 | [diff] [blame] | 572 | static void remove_xdomain(struct tb_xdomain *xd) |
| 573 | { |
| 574 | struct tb_switch *sw; |
| 575 | |
| 576 | sw = tb_to_switch(xd->dev.parent); |
| 577 | tb_port_at(xd->route, sw)->xdomain = NULL; |
| 578 | tb_xdomain_remove(xd); |
| 579 | } |
| 580 | |
Mika Westerberg | f67cf49 | 2017-06-06 15:25:16 +0300 | [diff] [blame] | 581 | static void |
| 582 | icm_fr_device_connected(struct tb *tb, const struct icm_pkg_header *hdr) |
| 583 | { |
| 584 | const struct icm_fr_event_device_connected *pkg = |
| 585 | (const struct icm_fr_event_device_connected *)hdr; |
Mika Westerberg | ee487dd | 2017-10-04 14:42:20 +0300 | [diff] [blame] | 586 | enum tb_security_level security_level; |
Mika Westerberg | f67cf49 | 2017-06-06 15:25:16 +0300 | [diff] [blame] | 587 | struct tb_switch *sw, *parent_sw; |
| 588 | struct icm *icm = tb_priv(tb); |
| 589 | bool authorized = false; |
Mika Westerberg | 79fae98 | 2018-02-09 17:29:38 +0300 | [diff] [blame] | 590 | struct tb_xdomain *xd; |
Mika Westerberg | f67cf49 | 2017-06-06 15:25:16 +0300 | [diff] [blame] | 591 | u8 link, depth; |
Yehezkel Bernat | 14862ee | 2018-01-22 12:50:09 +0200 | [diff] [blame] | 592 | bool boot; |
Mika Westerberg | f67cf49 | 2017-06-06 15:25:16 +0300 | [diff] [blame] | 593 | u64 route; |
| 594 | int ret; |
| 595 | |
| 596 | link = pkg->link_info & ICM_LINK_INFO_LINK_MASK; |
| 597 | depth = (pkg->link_info & ICM_LINK_INFO_DEPTH_MASK) >> |
| 598 | ICM_LINK_INFO_DEPTH_SHIFT; |
| 599 | authorized = pkg->link_info & ICM_LINK_INFO_APPROVED; |
Mika Westerberg | ee487dd | 2017-10-04 14:42:20 +0300 | [diff] [blame] | 600 | security_level = (pkg->hdr.flags & ICM_FLAGS_SLEVEL_MASK) >> |
| 601 | ICM_FLAGS_SLEVEL_SHIFT; |
Yehezkel Bernat | 14862ee | 2018-01-22 12:50:09 +0200 | [diff] [blame] | 602 | boot = pkg->link_info & ICM_LINK_INFO_BOOT; |
Mika Westerberg | f67cf49 | 2017-06-06 15:25:16 +0300 | [diff] [blame] | 603 | |
Mika Westerberg | cb653ee | 2017-09-14 13:59:10 +0300 | [diff] [blame] | 604 | if (pkg->link_info & ICM_LINK_INFO_REJECTED) { |
| 605 | tb_info(tb, "switch at %u.%u was rejected by ICM firmware because topology limit exceeded\n", |
| 606 | link, depth); |
| 607 | return; |
| 608 | } |
| 609 | |
Mika Westerberg | f67cf49 | 2017-06-06 15:25:16 +0300 | [diff] [blame] | 610 | sw = tb_switch_find_by_uuid(tb, &pkg->ep_uuid); |
| 611 | if (sw) { |
| 612 | u8 phy_port, sw_phy_port; |
| 613 | |
| 614 | parent_sw = tb_to_switch(sw->dev.parent); |
Mika Westerberg | fdd92e8 | 2018-07-25 11:03:17 +0300 | [diff] [blame] | 615 | sw_phy_port = tb_phy_port_from_link(sw->link); |
| 616 | phy_port = tb_phy_port_from_link(link); |
Mika Westerberg | f67cf49 | 2017-06-06 15:25:16 +0300 | [diff] [blame] | 617 | |
| 618 | /* |
| 619 | * On resume ICM will send us connected events for the |
| 620 | * devices that still are present. However, that |
| 621 | * information might have changed for example by the |
| 622 | * fact that a switch on a dual-link connection might |
| 623 | * have been enumerated using the other link now. Make |
| 624 | * sure our book keeping matches that. |
| 625 | */ |
| 626 | if (sw->depth == depth && sw_phy_port == phy_port && |
| 627 | !!sw->authorized == authorized) { |
Mika Westerberg | fdd92e8 | 2018-07-25 11:03:17 +0300 | [diff] [blame] | 628 | /* |
| 629 | * It was enumerated through another link so update |
| 630 | * route string accordingly. |
| 631 | */ |
| 632 | if (sw->link != link) { |
| 633 | ret = icm->get_route(tb, link, depth, &route); |
| 634 | if (ret) { |
| 635 | tb_err(tb, "failed to update route string for switch at %u.%u\n", |
| 636 | link, depth); |
| 637 | tb_switch_put(sw); |
| 638 | return; |
| 639 | } |
| 640 | } else { |
| 641 | route = tb_route(sw); |
| 642 | } |
| 643 | |
Mika Westerberg | ee487dd | 2017-10-04 14:42:20 +0300 | [diff] [blame] | 644 | update_switch(parent_sw, sw, route, pkg->connection_id, |
Yehezkel Bernat | 14862ee | 2018-01-22 12:50:09 +0200 | [diff] [blame] | 645 | pkg->connection_key, link, depth, boot); |
Mika Westerberg | f67cf49 | 2017-06-06 15:25:16 +0300 | [diff] [blame] | 646 | tb_switch_put(sw); |
| 647 | return; |
| 648 | } |
| 649 | |
| 650 | /* |
| 651 | * User connected the same switch to another physical |
| 652 | * port or to another part of the topology. Remove the |
| 653 | * existing switch now before adding the new one. |
| 654 | */ |
| 655 | remove_switch(sw); |
| 656 | tb_switch_put(sw); |
| 657 | } |
| 658 | |
| 659 | /* |
| 660 | * If the switch was not found by UUID, look for a switch on |
| 661 | * same physical port (taking possible link aggregation into |
| 662 | * account) and depth. If we found one it is definitely a stale |
| 663 | * one so remove it first. |
| 664 | */ |
| 665 | sw = tb_switch_find_by_link_depth(tb, link, depth); |
| 666 | if (!sw) { |
| 667 | u8 dual_link; |
| 668 | |
| 669 | dual_link = dual_link_from_link(link); |
| 670 | if (dual_link) |
| 671 | sw = tb_switch_find_by_link_depth(tb, dual_link, depth); |
| 672 | } |
| 673 | if (sw) { |
| 674 | remove_switch(sw); |
| 675 | tb_switch_put(sw); |
| 676 | } |
| 677 | |
Mika Westerberg | 79fae98 | 2018-02-09 17:29:38 +0300 | [diff] [blame] | 678 | /* Remove existing XDomain connection if found */ |
| 679 | xd = tb_xdomain_find_by_link_depth(tb, link, depth); |
| 680 | if (xd) { |
| 681 | remove_xdomain(xd); |
| 682 | tb_xdomain_put(xd); |
| 683 | } |
| 684 | |
Mika Westerberg | f67cf49 | 2017-06-06 15:25:16 +0300 | [diff] [blame] | 685 | parent_sw = tb_switch_find_by_link_depth(tb, link, depth - 1); |
| 686 | if (!parent_sw) { |
| 687 | tb_err(tb, "failed to find parent switch for %u.%u\n", |
| 688 | link, depth); |
| 689 | return; |
| 690 | } |
| 691 | |
Mika Westerberg | fdd92e8 | 2018-07-25 11:03:17 +0300 | [diff] [blame] | 692 | ret = icm->get_route(tb, link, depth, &route); |
| 693 | if (ret) { |
| 694 | tb_err(tb, "failed to find route string for switch at %u.%u\n", |
| 695 | link, depth); |
| 696 | tb_switch_put(parent_sw); |
| 697 | return; |
| 698 | } |
| 699 | |
Mika Westerberg | 2d8ff0b | 2018-07-25 11:48:39 +0300 | [diff] [blame] | 700 | add_switch(parent_sw, route, &pkg->ep_uuid, (const u8 *)pkg->ep_name, |
| 701 | sizeof(pkg->ep_name), pkg->connection_id, |
Mika Westerberg | ee487dd | 2017-10-04 14:42:20 +0300 | [diff] [blame] | 702 | pkg->connection_key, link, depth, security_level, |
Yehezkel Bernat | 14862ee | 2018-01-22 12:50:09 +0200 | [diff] [blame] | 703 | authorized, boot); |
Mika Westerberg | f67cf49 | 2017-06-06 15:25:16 +0300 | [diff] [blame] | 704 | |
Mika Westerberg | f67cf49 | 2017-06-06 15:25:16 +0300 | [diff] [blame] | 705 | tb_switch_put(parent_sw); |
| 706 | } |
| 707 | |
| 708 | static void |
| 709 | icm_fr_device_disconnected(struct tb *tb, const struct icm_pkg_header *hdr) |
| 710 | { |
| 711 | const struct icm_fr_event_device_disconnected *pkg = |
| 712 | (const struct icm_fr_event_device_disconnected *)hdr; |
| 713 | struct tb_switch *sw; |
| 714 | u8 link, depth; |
| 715 | |
| 716 | link = pkg->link_info & ICM_LINK_INFO_LINK_MASK; |
| 717 | depth = (pkg->link_info & ICM_LINK_INFO_DEPTH_MASK) >> |
| 718 | ICM_LINK_INFO_DEPTH_SHIFT; |
| 719 | |
| 720 | if (link > ICM_MAX_LINK || depth > ICM_MAX_DEPTH) { |
| 721 | tb_warn(tb, "invalid topology %u.%u, ignoring\n", link, depth); |
| 722 | return; |
| 723 | } |
| 724 | |
| 725 | sw = tb_switch_find_by_link_depth(tb, link, depth); |
| 726 | if (!sw) { |
| 727 | tb_warn(tb, "no switch exists at %u.%u, ignoring\n", link, |
| 728 | depth); |
| 729 | return; |
| 730 | } |
| 731 | |
| 732 | remove_switch(sw); |
| 733 | tb_switch_put(sw); |
| 734 | } |
| 735 | |
Mika Westerberg | d1ff702 | 2017-10-02 13:38:34 +0300 | [diff] [blame] | 736 | static void |
| 737 | icm_fr_xdomain_connected(struct tb *tb, const struct icm_pkg_header *hdr) |
| 738 | { |
| 739 | const struct icm_fr_event_xdomain_connected *pkg = |
| 740 | (const struct icm_fr_event_xdomain_connected *)hdr; |
| 741 | struct tb_xdomain *xd; |
| 742 | struct tb_switch *sw; |
| 743 | u8 link, depth; |
Mika Westerberg | d1ff702 | 2017-10-02 13:38:34 +0300 | [diff] [blame] | 744 | u64 route; |
| 745 | |
Mika Westerberg | d1ff702 | 2017-10-02 13:38:34 +0300 | [diff] [blame] | 746 | link = pkg->link_info & ICM_LINK_INFO_LINK_MASK; |
| 747 | depth = (pkg->link_info & ICM_LINK_INFO_DEPTH_MASK) >> |
| 748 | ICM_LINK_INFO_DEPTH_SHIFT; |
Mika Westerberg | d1ff702 | 2017-10-02 13:38:34 +0300 | [diff] [blame] | 749 | |
| 750 | if (link > ICM_MAX_LINK || depth > ICM_MAX_DEPTH) { |
| 751 | tb_warn(tb, "invalid topology %u.%u, ignoring\n", link, depth); |
| 752 | return; |
| 753 | } |
| 754 | |
| 755 | route = get_route(pkg->local_route_hi, pkg->local_route_lo); |
| 756 | |
| 757 | xd = tb_xdomain_find_by_uuid(tb, &pkg->remote_uuid); |
| 758 | if (xd) { |
| 759 | u8 xd_phy_port, phy_port; |
| 760 | |
| 761 | xd_phy_port = phy_port_from_route(xd->route, xd->depth); |
| 762 | phy_port = phy_port_from_route(route, depth); |
| 763 | |
| 764 | if (xd->depth == depth && xd_phy_port == phy_port) { |
Mika Westerberg | ee487dd | 2017-10-04 14:42:20 +0300 | [diff] [blame] | 765 | update_xdomain(xd, route, link); |
Mika Westerberg | d1ff702 | 2017-10-02 13:38:34 +0300 | [diff] [blame] | 766 | tb_xdomain_put(xd); |
| 767 | return; |
| 768 | } |
| 769 | |
| 770 | /* |
| 771 | * If we find an existing XDomain connection remove it |
| 772 | * now. We need to go through login handshake and |
| 773 | * everything anyway to be able to re-establish the |
| 774 | * connection. |
| 775 | */ |
| 776 | remove_xdomain(xd); |
| 777 | tb_xdomain_put(xd); |
| 778 | } |
| 779 | |
| 780 | /* |
| 781 | * Look if there already exists an XDomain in the same place |
| 782 | * than the new one and in that case remove it because it is |
| 783 | * most likely another host that got disconnected. |
| 784 | */ |
| 785 | xd = tb_xdomain_find_by_link_depth(tb, link, depth); |
| 786 | if (!xd) { |
| 787 | u8 dual_link; |
| 788 | |
| 789 | dual_link = dual_link_from_link(link); |
| 790 | if (dual_link) |
| 791 | xd = tb_xdomain_find_by_link_depth(tb, dual_link, |
| 792 | depth); |
| 793 | } |
| 794 | if (xd) { |
| 795 | remove_xdomain(xd); |
| 796 | tb_xdomain_put(xd); |
| 797 | } |
| 798 | |
| 799 | /* |
| 800 | * If the user disconnected a switch during suspend and |
| 801 | * connected another host to the same port, remove the switch |
| 802 | * first. |
| 803 | */ |
| 804 | sw = get_switch_at_route(tb->root_switch, route); |
| 805 | if (sw) |
| 806 | remove_switch(sw); |
| 807 | |
| 808 | sw = tb_switch_find_by_link_depth(tb, link, depth); |
| 809 | if (!sw) { |
| 810 | tb_warn(tb, "no switch exists at %u.%u, ignoring\n", link, |
| 811 | depth); |
| 812 | return; |
| 813 | } |
| 814 | |
Mika Westerberg | ee487dd | 2017-10-04 14:42:20 +0300 | [diff] [blame] | 815 | add_xdomain(sw, route, &pkg->local_uuid, &pkg->remote_uuid, link, |
| 816 | depth); |
Mika Westerberg | d1ff702 | 2017-10-02 13:38:34 +0300 | [diff] [blame] | 817 | tb_switch_put(sw); |
| 818 | } |
| 819 | |
| 820 | static void |
| 821 | icm_fr_xdomain_disconnected(struct tb *tb, const struct icm_pkg_header *hdr) |
| 822 | { |
| 823 | const struct icm_fr_event_xdomain_disconnected *pkg = |
| 824 | (const struct icm_fr_event_xdomain_disconnected *)hdr; |
| 825 | struct tb_xdomain *xd; |
| 826 | |
| 827 | /* |
| 828 | * If the connection is through one or multiple devices, the |
| 829 | * XDomain device is removed along with them so it is fine if we |
| 830 | * cannot find it here. |
| 831 | */ |
| 832 | xd = tb_xdomain_find_by_uuid(tb, &pkg->remote_uuid); |
| 833 | if (xd) { |
| 834 | remove_xdomain(xd); |
| 835 | tb_xdomain_put(xd); |
| 836 | } |
| 837 | } |
| 838 | |
Radion Mirchevsky | 4bac471 | 2017-10-04 16:43:43 +0300 | [diff] [blame] | 839 | static int |
| 840 | icm_tr_driver_ready(struct tb *tb, enum tb_security_level *security_level, |
Mika Westerberg | 2d8ff0b | 2018-07-25 11:48:39 +0300 | [diff] [blame] | 841 | size_t *nboot_acl, bool *rpm) |
Radion Mirchevsky | 4bac471 | 2017-10-04 16:43:43 +0300 | [diff] [blame] | 842 | { |
| 843 | struct icm_tr_pkg_driver_ready_response reply; |
| 844 | struct icm_pkg_driver_ready request = { |
| 845 | .hdr.code = ICM_DRIVER_READY, |
| 846 | }; |
| 847 | int ret; |
| 848 | |
| 849 | memset(&reply, 0, sizeof(reply)); |
| 850 | ret = icm_request(tb, &request, sizeof(request), &reply, sizeof(reply), |
| 851 | 1, 20000); |
| 852 | if (ret) |
| 853 | return ret; |
| 854 | |
| 855 | if (security_level) |
| 856 | *security_level = reply.info & ICM_TR_INFO_SLEVEL_MASK; |
| 857 | if (nboot_acl) |
| 858 | *nboot_acl = (reply.info & ICM_TR_INFO_BOOT_ACL_MASK) >> |
| 859 | ICM_TR_INFO_BOOT_ACL_SHIFT; |
Mika Westerberg | 2d8ff0b | 2018-07-25 11:48:39 +0300 | [diff] [blame] | 860 | if (rpm) |
| 861 | *rpm = !!(reply.hdr.flags & ICM_TR_FLAGS_RTD3); |
| 862 | |
Radion Mirchevsky | 4bac471 | 2017-10-04 16:43:43 +0300 | [diff] [blame] | 863 | return 0; |
| 864 | } |
| 865 | |
| 866 | static int icm_tr_approve_switch(struct tb *tb, struct tb_switch *sw) |
| 867 | { |
| 868 | struct icm_tr_pkg_approve_device request; |
| 869 | struct icm_tr_pkg_approve_device reply; |
| 870 | int ret; |
| 871 | |
| 872 | memset(&request, 0, sizeof(request)); |
| 873 | memcpy(&request.ep_uuid, sw->uuid, sizeof(request.ep_uuid)); |
| 874 | request.hdr.code = ICM_APPROVE_DEVICE; |
| 875 | request.route_lo = sw->config.route_lo; |
| 876 | request.route_hi = sw->config.route_hi; |
| 877 | request.connection_id = sw->connection_id; |
| 878 | |
| 879 | memset(&reply, 0, sizeof(reply)); |
| 880 | ret = icm_request(tb, &request, sizeof(request), &reply, sizeof(reply), |
| 881 | 1, ICM_APPROVE_TIMEOUT); |
| 882 | if (ret) |
| 883 | return ret; |
| 884 | |
| 885 | if (reply.hdr.flags & ICM_FLAGS_ERROR) { |
| 886 | tb_warn(tb, "PCIe tunnel creation failed\n"); |
| 887 | return -EIO; |
| 888 | } |
| 889 | |
| 890 | return 0; |
| 891 | } |
| 892 | |
| 893 | static int icm_tr_add_switch_key(struct tb *tb, struct tb_switch *sw) |
| 894 | { |
| 895 | struct icm_tr_pkg_add_device_key_response reply; |
| 896 | struct icm_tr_pkg_add_device_key request; |
| 897 | int ret; |
| 898 | |
| 899 | memset(&request, 0, sizeof(request)); |
| 900 | memcpy(&request.ep_uuid, sw->uuid, sizeof(request.ep_uuid)); |
| 901 | request.hdr.code = ICM_ADD_DEVICE_KEY; |
| 902 | request.route_lo = sw->config.route_lo; |
| 903 | request.route_hi = sw->config.route_hi; |
| 904 | request.connection_id = sw->connection_id; |
| 905 | memcpy(request.key, sw->key, TB_SWITCH_KEY_SIZE); |
| 906 | |
| 907 | memset(&reply, 0, sizeof(reply)); |
| 908 | ret = icm_request(tb, &request, sizeof(request), &reply, sizeof(reply), |
| 909 | 1, ICM_TIMEOUT); |
| 910 | if (ret) |
| 911 | return ret; |
| 912 | |
| 913 | if (reply.hdr.flags & ICM_FLAGS_ERROR) { |
| 914 | tb_warn(tb, "Adding key to switch failed\n"); |
| 915 | return -EIO; |
| 916 | } |
| 917 | |
| 918 | return 0; |
| 919 | } |
| 920 | |
| 921 | static int icm_tr_challenge_switch_key(struct tb *tb, struct tb_switch *sw, |
| 922 | const u8 *challenge, u8 *response) |
| 923 | { |
| 924 | struct icm_tr_pkg_challenge_device_response reply; |
| 925 | struct icm_tr_pkg_challenge_device request; |
| 926 | int ret; |
| 927 | |
| 928 | memset(&request, 0, sizeof(request)); |
| 929 | memcpy(&request.ep_uuid, sw->uuid, sizeof(request.ep_uuid)); |
| 930 | request.hdr.code = ICM_CHALLENGE_DEVICE; |
| 931 | request.route_lo = sw->config.route_lo; |
| 932 | request.route_hi = sw->config.route_hi; |
| 933 | request.connection_id = sw->connection_id; |
| 934 | memcpy(request.challenge, challenge, TB_SWITCH_KEY_SIZE); |
| 935 | |
| 936 | memset(&reply, 0, sizeof(reply)); |
| 937 | ret = icm_request(tb, &request, sizeof(request), &reply, sizeof(reply), |
| 938 | 1, ICM_TIMEOUT); |
| 939 | if (ret) |
| 940 | return ret; |
| 941 | |
| 942 | if (reply.hdr.flags & ICM_FLAGS_ERROR) |
| 943 | return -EKEYREJECTED; |
| 944 | if (reply.hdr.flags & ICM_FLAGS_NO_KEY) |
| 945 | return -ENOKEY; |
| 946 | |
| 947 | memcpy(response, reply.response, TB_SWITCH_KEY_SIZE); |
| 948 | |
| 949 | return 0; |
| 950 | } |
| 951 | |
| 952 | static int icm_tr_approve_xdomain_paths(struct tb *tb, struct tb_xdomain *xd) |
| 953 | { |
| 954 | struct icm_tr_pkg_approve_xdomain_response reply; |
| 955 | struct icm_tr_pkg_approve_xdomain request; |
| 956 | int ret; |
| 957 | |
| 958 | memset(&request, 0, sizeof(request)); |
| 959 | request.hdr.code = ICM_APPROVE_XDOMAIN; |
| 960 | request.route_hi = upper_32_bits(xd->route); |
| 961 | request.route_lo = lower_32_bits(xd->route); |
| 962 | request.transmit_path = xd->transmit_path; |
| 963 | request.transmit_ring = xd->transmit_ring; |
| 964 | request.receive_path = xd->receive_path; |
| 965 | request.receive_ring = xd->receive_ring; |
| 966 | memcpy(&request.remote_uuid, xd->remote_uuid, sizeof(*xd->remote_uuid)); |
| 967 | |
| 968 | memset(&reply, 0, sizeof(reply)); |
| 969 | ret = icm_request(tb, &request, sizeof(request), &reply, sizeof(reply), |
| 970 | 1, ICM_TIMEOUT); |
| 971 | if (ret) |
| 972 | return ret; |
| 973 | |
| 974 | if (reply.hdr.flags & ICM_FLAGS_ERROR) |
| 975 | return -EIO; |
| 976 | |
| 977 | return 0; |
| 978 | } |
| 979 | |
| 980 | static int icm_tr_xdomain_tear_down(struct tb *tb, struct tb_xdomain *xd, |
| 981 | int stage) |
| 982 | { |
| 983 | struct icm_tr_pkg_disconnect_xdomain_response reply; |
| 984 | struct icm_tr_pkg_disconnect_xdomain request; |
| 985 | int ret; |
| 986 | |
| 987 | memset(&request, 0, sizeof(request)); |
| 988 | request.hdr.code = ICM_DISCONNECT_XDOMAIN; |
| 989 | request.stage = stage; |
| 990 | request.route_hi = upper_32_bits(xd->route); |
| 991 | request.route_lo = lower_32_bits(xd->route); |
| 992 | memcpy(&request.remote_uuid, xd->remote_uuid, sizeof(*xd->remote_uuid)); |
| 993 | |
| 994 | memset(&reply, 0, sizeof(reply)); |
| 995 | ret = icm_request(tb, &request, sizeof(request), &reply, sizeof(reply), |
| 996 | 1, ICM_TIMEOUT); |
| 997 | if (ret) |
| 998 | return ret; |
| 999 | |
| 1000 | if (reply.hdr.flags & ICM_FLAGS_ERROR) |
| 1001 | return -EIO; |
| 1002 | |
| 1003 | return 0; |
| 1004 | } |
| 1005 | |
| 1006 | static int icm_tr_disconnect_xdomain_paths(struct tb *tb, struct tb_xdomain *xd) |
| 1007 | { |
| 1008 | int ret; |
| 1009 | |
| 1010 | ret = icm_tr_xdomain_tear_down(tb, xd, 1); |
| 1011 | if (ret) |
| 1012 | return ret; |
| 1013 | |
| 1014 | usleep_range(10, 50); |
| 1015 | return icm_tr_xdomain_tear_down(tb, xd, 2); |
| 1016 | } |
| 1017 | |
| 1018 | static void |
| 1019 | icm_tr_device_connected(struct tb *tb, const struct icm_pkg_header *hdr) |
| 1020 | { |
| 1021 | const struct icm_tr_event_device_connected *pkg = |
| 1022 | (const struct icm_tr_event_device_connected *)hdr; |
| 1023 | enum tb_security_level security_level; |
| 1024 | struct tb_switch *sw, *parent_sw; |
| 1025 | struct tb_xdomain *xd; |
| 1026 | bool authorized, boot; |
| 1027 | u64 route; |
| 1028 | |
| 1029 | /* |
| 1030 | * Currently we don't use the QoS information coming with the |
| 1031 | * device connected message so simply just ignore that extra |
| 1032 | * packet for now. |
| 1033 | */ |
| 1034 | if (pkg->hdr.packet_id) |
| 1035 | return; |
| 1036 | |
Radion Mirchevsky | 4bac471 | 2017-10-04 16:43:43 +0300 | [diff] [blame] | 1037 | route = get_route(pkg->route_hi, pkg->route_lo); |
| 1038 | authorized = pkg->link_info & ICM_LINK_INFO_APPROVED; |
| 1039 | security_level = (pkg->hdr.flags & ICM_FLAGS_SLEVEL_MASK) >> |
| 1040 | ICM_FLAGS_SLEVEL_SHIFT; |
| 1041 | boot = pkg->link_info & ICM_LINK_INFO_BOOT; |
| 1042 | |
| 1043 | if (pkg->link_info & ICM_LINK_INFO_REJECTED) { |
| 1044 | tb_info(tb, "switch at %llx was rejected by ICM firmware because topology limit exceeded\n", |
| 1045 | route); |
| 1046 | return; |
| 1047 | } |
| 1048 | |
| 1049 | sw = tb_switch_find_by_uuid(tb, &pkg->ep_uuid); |
| 1050 | if (sw) { |
| 1051 | /* Update the switch if it is still in the same place */ |
| 1052 | if (tb_route(sw) == route && !!sw->authorized == authorized) { |
| 1053 | parent_sw = tb_to_switch(sw->dev.parent); |
| 1054 | update_switch(parent_sw, sw, route, pkg->connection_id, |
| 1055 | 0, 0, 0, boot); |
| 1056 | tb_switch_put(sw); |
| 1057 | return; |
| 1058 | } |
| 1059 | |
| 1060 | remove_switch(sw); |
| 1061 | tb_switch_put(sw); |
| 1062 | } |
| 1063 | |
| 1064 | /* Another switch with the same address */ |
| 1065 | sw = tb_switch_find_by_route(tb, route); |
| 1066 | if (sw) { |
| 1067 | remove_switch(sw); |
| 1068 | tb_switch_put(sw); |
| 1069 | } |
| 1070 | |
| 1071 | /* XDomain connection with the same address */ |
| 1072 | xd = tb_xdomain_find_by_route(tb, route); |
| 1073 | if (xd) { |
| 1074 | remove_xdomain(xd); |
| 1075 | tb_xdomain_put(xd); |
| 1076 | } |
| 1077 | |
| 1078 | parent_sw = tb_switch_find_by_route(tb, get_parent_route(route)); |
| 1079 | if (!parent_sw) { |
| 1080 | tb_err(tb, "failed to find parent switch for %llx\n", route); |
| 1081 | return; |
| 1082 | } |
| 1083 | |
Mika Westerberg | 2d8ff0b | 2018-07-25 11:48:39 +0300 | [diff] [blame] | 1084 | add_switch(parent_sw, route, &pkg->ep_uuid, (const u8 *)pkg->ep_name, |
| 1085 | sizeof(pkg->ep_name), pkg->connection_id, |
Radion Mirchevsky | 4bac471 | 2017-10-04 16:43:43 +0300 | [diff] [blame] | 1086 | 0, 0, 0, security_level, authorized, boot); |
| 1087 | |
| 1088 | tb_switch_put(parent_sw); |
| 1089 | } |
| 1090 | |
| 1091 | static void |
| 1092 | icm_tr_device_disconnected(struct tb *tb, const struct icm_pkg_header *hdr) |
| 1093 | { |
| 1094 | const struct icm_tr_event_device_disconnected *pkg = |
| 1095 | (const struct icm_tr_event_device_disconnected *)hdr; |
| 1096 | struct tb_switch *sw; |
| 1097 | u64 route; |
| 1098 | |
| 1099 | route = get_route(pkg->route_hi, pkg->route_lo); |
| 1100 | |
| 1101 | sw = tb_switch_find_by_route(tb, route); |
| 1102 | if (!sw) { |
| 1103 | tb_warn(tb, "no switch exists at %llx, ignoring\n", route); |
| 1104 | return; |
| 1105 | } |
| 1106 | |
| 1107 | remove_switch(sw); |
| 1108 | tb_switch_put(sw); |
| 1109 | } |
| 1110 | |
| 1111 | static void |
| 1112 | icm_tr_xdomain_connected(struct tb *tb, const struct icm_pkg_header *hdr) |
| 1113 | { |
| 1114 | const struct icm_tr_event_xdomain_connected *pkg = |
| 1115 | (const struct icm_tr_event_xdomain_connected *)hdr; |
| 1116 | struct tb_xdomain *xd; |
| 1117 | struct tb_switch *sw; |
| 1118 | u64 route; |
| 1119 | |
| 1120 | if (!tb->root_switch) |
| 1121 | return; |
| 1122 | |
| 1123 | route = get_route(pkg->local_route_hi, pkg->local_route_lo); |
| 1124 | |
| 1125 | xd = tb_xdomain_find_by_uuid(tb, &pkg->remote_uuid); |
| 1126 | if (xd) { |
| 1127 | if (xd->route == route) { |
| 1128 | update_xdomain(xd, route, 0); |
| 1129 | tb_xdomain_put(xd); |
| 1130 | return; |
| 1131 | } |
| 1132 | |
| 1133 | remove_xdomain(xd); |
| 1134 | tb_xdomain_put(xd); |
| 1135 | } |
| 1136 | |
| 1137 | /* An existing xdomain with the same address */ |
| 1138 | xd = tb_xdomain_find_by_route(tb, route); |
| 1139 | if (xd) { |
| 1140 | remove_xdomain(xd); |
| 1141 | tb_xdomain_put(xd); |
| 1142 | } |
| 1143 | |
| 1144 | /* |
| 1145 | * If the user disconnected a switch during suspend and |
| 1146 | * connected another host to the same port, remove the switch |
| 1147 | * first. |
| 1148 | */ |
| 1149 | sw = get_switch_at_route(tb->root_switch, route); |
| 1150 | if (sw) |
| 1151 | remove_switch(sw); |
| 1152 | |
| 1153 | sw = tb_switch_find_by_route(tb, get_parent_route(route)); |
| 1154 | if (!sw) { |
| 1155 | tb_warn(tb, "no switch exists at %llx, ignoring\n", route); |
| 1156 | return; |
| 1157 | } |
| 1158 | |
| 1159 | add_xdomain(sw, route, &pkg->local_uuid, &pkg->remote_uuid, 0, 0); |
| 1160 | tb_switch_put(sw); |
| 1161 | } |
| 1162 | |
| 1163 | static void |
| 1164 | icm_tr_xdomain_disconnected(struct tb *tb, const struct icm_pkg_header *hdr) |
| 1165 | { |
| 1166 | const struct icm_tr_event_xdomain_disconnected *pkg = |
| 1167 | (const struct icm_tr_event_xdomain_disconnected *)hdr; |
| 1168 | struct tb_xdomain *xd; |
| 1169 | u64 route; |
| 1170 | |
| 1171 | route = get_route(pkg->route_hi, pkg->route_lo); |
| 1172 | |
| 1173 | xd = tb_xdomain_find_by_route(tb, route); |
| 1174 | if (xd) { |
| 1175 | remove_xdomain(xd); |
| 1176 | tb_xdomain_put(xd); |
| 1177 | } |
| 1178 | } |
| 1179 | |
Mika Westerberg | f67cf49 | 2017-06-06 15:25:16 +0300 | [diff] [blame] | 1180 | static struct pci_dev *get_upstream_port(struct pci_dev *pdev) |
| 1181 | { |
| 1182 | struct pci_dev *parent; |
| 1183 | |
| 1184 | parent = pci_upstream_bridge(pdev); |
| 1185 | while (parent) { |
| 1186 | if (!pci_is_pcie(parent)) |
| 1187 | return NULL; |
| 1188 | if (pci_pcie_type(parent) == PCI_EXP_TYPE_UPSTREAM) |
| 1189 | break; |
| 1190 | parent = pci_upstream_bridge(parent); |
| 1191 | } |
| 1192 | |
| 1193 | if (!parent) |
| 1194 | return NULL; |
| 1195 | |
| 1196 | switch (parent->device) { |
| 1197 | case PCI_DEVICE_ID_INTEL_ALPINE_RIDGE_2C_BRIDGE: |
| 1198 | case PCI_DEVICE_ID_INTEL_ALPINE_RIDGE_4C_BRIDGE: |
| 1199 | case PCI_DEVICE_ID_INTEL_ALPINE_RIDGE_LP_BRIDGE: |
| 1200 | case PCI_DEVICE_ID_INTEL_ALPINE_RIDGE_C_4C_BRIDGE: |
| 1201 | case PCI_DEVICE_ID_INTEL_ALPINE_RIDGE_C_2C_BRIDGE: |
| 1202 | return parent; |
| 1203 | } |
| 1204 | |
| 1205 | return NULL; |
| 1206 | } |
| 1207 | |
| 1208 | static bool icm_ar_is_supported(struct tb *tb) |
| 1209 | { |
| 1210 | struct pci_dev *upstream_port; |
| 1211 | struct icm *icm = tb_priv(tb); |
| 1212 | |
| 1213 | /* |
| 1214 | * Starting from Alpine Ridge we can use ICM on Apple machines |
| 1215 | * as well. We just need to reset and re-enable it first. |
| 1216 | */ |
Lukas Wunner | 630b3af | 2017-08-01 14:10:41 +0200 | [diff] [blame] | 1217 | if (!x86_apple_machine) |
Mika Westerberg | f67cf49 | 2017-06-06 15:25:16 +0300 | [diff] [blame] | 1218 | return true; |
| 1219 | |
| 1220 | /* |
| 1221 | * Find the upstream PCIe port in case we need to do reset |
| 1222 | * through its vendor specific registers. |
| 1223 | */ |
| 1224 | upstream_port = get_upstream_port(tb->nhi->pdev); |
| 1225 | if (upstream_port) { |
| 1226 | int cap; |
| 1227 | |
| 1228 | cap = pci_find_ext_capability(upstream_port, |
| 1229 | PCI_EXT_CAP_ID_VNDR); |
| 1230 | if (cap > 0) { |
| 1231 | icm->upstream_port = upstream_port; |
| 1232 | icm->vnd_cap = cap; |
| 1233 | |
| 1234 | return true; |
| 1235 | } |
| 1236 | } |
| 1237 | |
| 1238 | return false; |
| 1239 | } |
| 1240 | |
| 1241 | static int icm_ar_get_mode(struct tb *tb) |
| 1242 | { |
| 1243 | struct tb_nhi *nhi = tb->nhi; |
Mika Westerberg | e4be8c9 | 2017-11-24 17:51:12 +0300 | [diff] [blame] | 1244 | int retries = 60; |
Mika Westerberg | f67cf49 | 2017-06-06 15:25:16 +0300 | [diff] [blame] | 1245 | u32 val; |
| 1246 | |
| 1247 | do { |
| 1248 | val = ioread32(nhi->iobase + REG_FW_STS); |
| 1249 | if (val & REG_FW_STS_NVM_AUTH_DONE) |
| 1250 | break; |
Mika Westerberg | e4be8c9 | 2017-11-24 17:51:12 +0300 | [diff] [blame] | 1251 | msleep(50); |
Mika Westerberg | f67cf49 | 2017-06-06 15:25:16 +0300 | [diff] [blame] | 1252 | } while (--retries); |
| 1253 | |
| 1254 | if (!retries) { |
| 1255 | dev_err(&nhi->pdev->dev, "ICM firmware not authenticated\n"); |
| 1256 | return -ENODEV; |
| 1257 | } |
| 1258 | |
| 1259 | return nhi_mailbox_mode(nhi); |
| 1260 | } |
| 1261 | |
Mika Westerberg | 9aaa3b8 | 2018-01-21 12:08:04 +0200 | [diff] [blame] | 1262 | static int |
| 1263 | icm_ar_driver_ready(struct tb *tb, enum tb_security_level *security_level, |
Mika Westerberg | 2d8ff0b | 2018-07-25 11:48:39 +0300 | [diff] [blame] | 1264 | size_t *nboot_acl, bool *rpm) |
Mika Westerberg | 9aaa3b8 | 2018-01-21 12:08:04 +0200 | [diff] [blame] | 1265 | { |
| 1266 | struct icm_ar_pkg_driver_ready_response reply; |
| 1267 | struct icm_pkg_driver_ready request = { |
| 1268 | .hdr.code = ICM_DRIVER_READY, |
| 1269 | }; |
| 1270 | int ret; |
| 1271 | |
| 1272 | memset(&reply, 0, sizeof(reply)); |
| 1273 | ret = icm_request(tb, &request, sizeof(request), &reply, sizeof(reply), |
| 1274 | 1, ICM_TIMEOUT); |
| 1275 | if (ret) |
| 1276 | return ret; |
| 1277 | |
| 1278 | if (security_level) |
| 1279 | *security_level = reply.info & ICM_AR_INFO_SLEVEL_MASK; |
| 1280 | if (nboot_acl && (reply.info & ICM_AR_INFO_BOOT_ACL_SUPPORTED)) |
| 1281 | *nboot_acl = (reply.info & ICM_AR_INFO_BOOT_ACL_MASK) >> |
| 1282 | ICM_AR_INFO_BOOT_ACL_SHIFT; |
Mika Westerberg | 2d8ff0b | 2018-07-25 11:48:39 +0300 | [diff] [blame] | 1283 | if (rpm) |
| 1284 | *rpm = !!(reply.hdr.flags & ICM_AR_FLAGS_RTD3); |
| 1285 | |
Mika Westerberg | 9aaa3b8 | 2018-01-21 12:08:04 +0200 | [diff] [blame] | 1286 | return 0; |
| 1287 | } |
| 1288 | |
Mika Westerberg | f67cf49 | 2017-06-06 15:25:16 +0300 | [diff] [blame] | 1289 | static int icm_ar_get_route(struct tb *tb, u8 link, u8 depth, u64 *route) |
| 1290 | { |
| 1291 | struct icm_ar_pkg_get_route_response reply; |
| 1292 | struct icm_ar_pkg_get_route request = { |
| 1293 | .hdr = { .code = ICM_GET_ROUTE }, |
| 1294 | .link_info = depth << ICM_LINK_INFO_DEPTH_SHIFT | link, |
| 1295 | }; |
| 1296 | int ret; |
| 1297 | |
| 1298 | memset(&reply, 0, sizeof(reply)); |
| 1299 | ret = icm_request(tb, &request, sizeof(request), &reply, sizeof(reply), |
| 1300 | 1, ICM_TIMEOUT); |
| 1301 | if (ret) |
| 1302 | return ret; |
| 1303 | |
| 1304 | if (reply.hdr.flags & ICM_FLAGS_ERROR) |
| 1305 | return -EIO; |
| 1306 | |
| 1307 | *route = get_route(reply.route_hi, reply.route_lo); |
| 1308 | return 0; |
| 1309 | } |
| 1310 | |
Mika Westerberg | 9aaa3b8 | 2018-01-21 12:08:04 +0200 | [diff] [blame] | 1311 | static int icm_ar_get_boot_acl(struct tb *tb, uuid_t *uuids, size_t nuuids) |
| 1312 | { |
| 1313 | struct icm_ar_pkg_preboot_acl_response reply; |
| 1314 | struct icm_ar_pkg_preboot_acl request = { |
| 1315 | .hdr = { .code = ICM_PREBOOT_ACL }, |
| 1316 | }; |
| 1317 | int ret, i; |
| 1318 | |
| 1319 | memset(&reply, 0, sizeof(reply)); |
| 1320 | ret = icm_request(tb, &request, sizeof(request), &reply, sizeof(reply), |
| 1321 | 1, ICM_TIMEOUT); |
| 1322 | if (ret) |
| 1323 | return ret; |
| 1324 | |
| 1325 | if (reply.hdr.flags & ICM_FLAGS_ERROR) |
| 1326 | return -EIO; |
| 1327 | |
| 1328 | for (i = 0; i < nuuids; i++) { |
| 1329 | u32 *uuid = (u32 *)&uuids[i]; |
| 1330 | |
| 1331 | uuid[0] = reply.acl[i].uuid_lo; |
| 1332 | uuid[1] = reply.acl[i].uuid_hi; |
| 1333 | |
| 1334 | if (uuid[0] == 0xffffffff && uuid[1] == 0xffffffff) { |
| 1335 | /* Map empty entries to null UUID */ |
| 1336 | uuid[0] = 0; |
| 1337 | uuid[1] = 0; |
Mika Westerberg | dd010bd | 2018-05-15 16:04:25 +0300 | [diff] [blame] | 1338 | } else if (uuid[0] != 0 || uuid[1] != 0) { |
Mika Westerberg | 9aaa3b8 | 2018-01-21 12:08:04 +0200 | [diff] [blame] | 1339 | /* Upper two DWs are always one's */ |
| 1340 | uuid[2] = 0xffffffff; |
| 1341 | uuid[3] = 0xffffffff; |
| 1342 | } |
| 1343 | } |
| 1344 | |
| 1345 | return ret; |
| 1346 | } |
| 1347 | |
| 1348 | static int icm_ar_set_boot_acl(struct tb *tb, const uuid_t *uuids, |
| 1349 | size_t nuuids) |
| 1350 | { |
| 1351 | struct icm_ar_pkg_preboot_acl_response reply; |
| 1352 | struct icm_ar_pkg_preboot_acl request = { |
| 1353 | .hdr = { |
| 1354 | .code = ICM_PREBOOT_ACL, |
| 1355 | .flags = ICM_FLAGS_WRITE, |
| 1356 | }, |
| 1357 | }; |
| 1358 | int ret, i; |
| 1359 | |
| 1360 | for (i = 0; i < nuuids; i++) { |
| 1361 | const u32 *uuid = (const u32 *)&uuids[i]; |
| 1362 | |
| 1363 | if (uuid_is_null(&uuids[i])) { |
| 1364 | /* |
| 1365 | * Map null UUID to the empty (all one) entries |
| 1366 | * for ICM. |
| 1367 | */ |
| 1368 | request.acl[i].uuid_lo = 0xffffffff; |
| 1369 | request.acl[i].uuid_hi = 0xffffffff; |
| 1370 | } else { |
| 1371 | /* Two high DWs need to be set to all one */ |
| 1372 | if (uuid[2] != 0xffffffff || uuid[3] != 0xffffffff) |
| 1373 | return -EINVAL; |
| 1374 | |
| 1375 | request.acl[i].uuid_lo = uuid[0]; |
| 1376 | request.acl[i].uuid_hi = uuid[1]; |
| 1377 | } |
| 1378 | } |
| 1379 | |
| 1380 | memset(&reply, 0, sizeof(reply)); |
| 1381 | ret = icm_request(tb, &request, sizeof(request), &reply, sizeof(reply), |
| 1382 | 1, ICM_TIMEOUT); |
| 1383 | if (ret) |
| 1384 | return ret; |
| 1385 | |
| 1386 | if (reply.hdr.flags & ICM_FLAGS_ERROR) |
| 1387 | return -EIO; |
| 1388 | |
| 1389 | return 0; |
| 1390 | } |
| 1391 | |
Mika Westerberg | f67cf49 | 2017-06-06 15:25:16 +0300 | [diff] [blame] | 1392 | static void icm_handle_notification(struct work_struct *work) |
| 1393 | { |
| 1394 | struct icm_notification *n = container_of(work, typeof(*n), work); |
| 1395 | struct tb *tb = n->tb; |
| 1396 | struct icm *icm = tb_priv(tb); |
| 1397 | |
| 1398 | mutex_lock(&tb->lock); |
| 1399 | |
Mika Westerberg | 86da809 | 2018-09-24 13:20:44 +0300 | [diff] [blame] | 1400 | /* |
| 1401 | * When the domain is stopped we flush its workqueue but before |
| 1402 | * that the root switch is removed. In that case we should treat |
| 1403 | * the queued events as being canceled. |
| 1404 | */ |
| 1405 | if (tb->root_switch) { |
| 1406 | switch (n->pkg->code) { |
| 1407 | case ICM_EVENT_DEVICE_CONNECTED: |
| 1408 | icm->device_connected(tb, n->pkg); |
| 1409 | break; |
| 1410 | case ICM_EVENT_DEVICE_DISCONNECTED: |
| 1411 | icm->device_disconnected(tb, n->pkg); |
| 1412 | break; |
| 1413 | case ICM_EVENT_XDOMAIN_CONNECTED: |
| 1414 | icm->xdomain_connected(tb, n->pkg); |
| 1415 | break; |
| 1416 | case ICM_EVENT_XDOMAIN_DISCONNECTED: |
| 1417 | icm->xdomain_disconnected(tb, n->pkg); |
| 1418 | break; |
| 1419 | } |
Mika Westerberg | f67cf49 | 2017-06-06 15:25:16 +0300 | [diff] [blame] | 1420 | } |
| 1421 | |
| 1422 | mutex_unlock(&tb->lock); |
| 1423 | |
| 1424 | kfree(n->pkg); |
| 1425 | kfree(n); |
| 1426 | } |
| 1427 | |
| 1428 | static void icm_handle_event(struct tb *tb, enum tb_cfg_pkg_type type, |
| 1429 | const void *buf, size_t size) |
| 1430 | { |
| 1431 | struct icm_notification *n; |
| 1432 | |
| 1433 | n = kmalloc(sizeof(*n), GFP_KERNEL); |
| 1434 | if (!n) |
| 1435 | return; |
| 1436 | |
| 1437 | INIT_WORK(&n->work, icm_handle_notification); |
| 1438 | n->pkg = kmemdup(buf, size, GFP_KERNEL); |
| 1439 | n->tb = tb; |
| 1440 | |
| 1441 | queue_work(tb->wq, &n->work); |
| 1442 | } |
| 1443 | |
| 1444 | static int |
Mika Westerberg | 9aaa3b8 | 2018-01-21 12:08:04 +0200 | [diff] [blame] | 1445 | __icm_driver_ready(struct tb *tb, enum tb_security_level *security_level, |
Mika Westerberg | 2d8ff0b | 2018-07-25 11:48:39 +0300 | [diff] [blame] | 1446 | size_t *nboot_acl, bool *rpm) |
Mika Westerberg | f67cf49 | 2017-06-06 15:25:16 +0300 | [diff] [blame] | 1447 | { |
Mika Westerberg | 3080e19 | 2017-10-06 18:14:13 +0300 | [diff] [blame] | 1448 | struct icm *icm = tb_priv(tb); |
Mika Westerberg | 44b51bb | 2017-09-14 13:44:07 +0300 | [diff] [blame] | 1449 | unsigned int retries = 50; |
Mika Westerberg | f67cf49 | 2017-06-06 15:25:16 +0300 | [diff] [blame] | 1450 | int ret; |
| 1451 | |
Mika Westerberg | 2d8ff0b | 2018-07-25 11:48:39 +0300 | [diff] [blame] | 1452 | ret = icm->driver_ready(tb, security_level, nboot_acl, rpm); |
Mika Westerberg | 3080e19 | 2017-10-06 18:14:13 +0300 | [diff] [blame] | 1453 | if (ret) { |
| 1454 | tb_err(tb, "failed to send driver ready to ICM\n"); |
Mika Westerberg | f67cf49 | 2017-06-06 15:25:16 +0300 | [diff] [blame] | 1455 | return ret; |
Mika Westerberg | 3080e19 | 2017-10-06 18:14:13 +0300 | [diff] [blame] | 1456 | } |
Mika Westerberg | f67cf49 | 2017-06-06 15:25:16 +0300 | [diff] [blame] | 1457 | |
| 1458 | /* |
| 1459 | * Hold on here until the switch config space is accessible so |
| 1460 | * that we can read root switch config successfully. |
| 1461 | */ |
| 1462 | do { |
| 1463 | struct tb_cfg_result res; |
| 1464 | u32 tmp; |
| 1465 | |
| 1466 | res = tb_cfg_read_raw(tb->ctl, &tmp, 0, 0, TB_CFG_SWITCH, |
| 1467 | 0, 1, 100); |
| 1468 | if (!res.err) |
| 1469 | return 0; |
| 1470 | |
| 1471 | msleep(50); |
| 1472 | } while (--retries); |
| 1473 | |
Mika Westerberg | 44b51bb | 2017-09-14 13:44:07 +0300 | [diff] [blame] | 1474 | tb_err(tb, "failed to read root switch config space, giving up\n"); |
Mika Westerberg | f67cf49 | 2017-06-06 15:25:16 +0300 | [diff] [blame] | 1475 | return -ETIMEDOUT; |
| 1476 | } |
| 1477 | |
| 1478 | static int pci2cio_wait_completion(struct icm *icm, unsigned long timeout_msec) |
| 1479 | { |
| 1480 | unsigned long end = jiffies + msecs_to_jiffies(timeout_msec); |
| 1481 | u32 cmd; |
| 1482 | |
| 1483 | do { |
| 1484 | pci_read_config_dword(icm->upstream_port, |
| 1485 | icm->vnd_cap + PCIE2CIO_CMD, &cmd); |
| 1486 | if (!(cmd & PCIE2CIO_CMD_START)) { |
| 1487 | if (cmd & PCIE2CIO_CMD_TIMEOUT) |
| 1488 | break; |
| 1489 | return 0; |
| 1490 | } |
| 1491 | |
| 1492 | msleep(50); |
| 1493 | } while (time_before(jiffies, end)); |
| 1494 | |
| 1495 | return -ETIMEDOUT; |
| 1496 | } |
| 1497 | |
| 1498 | static int pcie2cio_read(struct icm *icm, enum tb_cfg_space cs, |
| 1499 | unsigned int port, unsigned int index, u32 *data) |
| 1500 | { |
| 1501 | struct pci_dev *pdev = icm->upstream_port; |
| 1502 | int ret, vnd_cap = icm->vnd_cap; |
| 1503 | u32 cmd; |
| 1504 | |
| 1505 | cmd = index; |
| 1506 | cmd |= (port << PCIE2CIO_CMD_PORT_SHIFT) & PCIE2CIO_CMD_PORT_MASK; |
| 1507 | cmd |= (cs << PCIE2CIO_CMD_CS_SHIFT) & PCIE2CIO_CMD_CS_MASK; |
| 1508 | cmd |= PCIE2CIO_CMD_START; |
| 1509 | pci_write_config_dword(pdev, vnd_cap + PCIE2CIO_CMD, cmd); |
| 1510 | |
| 1511 | ret = pci2cio_wait_completion(icm, 5000); |
| 1512 | if (ret) |
| 1513 | return ret; |
| 1514 | |
| 1515 | pci_read_config_dword(pdev, vnd_cap + PCIE2CIO_RDDATA, data); |
| 1516 | return 0; |
| 1517 | } |
| 1518 | |
| 1519 | static int pcie2cio_write(struct icm *icm, enum tb_cfg_space cs, |
| 1520 | unsigned int port, unsigned int index, u32 data) |
| 1521 | { |
| 1522 | struct pci_dev *pdev = icm->upstream_port; |
| 1523 | int vnd_cap = icm->vnd_cap; |
| 1524 | u32 cmd; |
| 1525 | |
| 1526 | pci_write_config_dword(pdev, vnd_cap + PCIE2CIO_WRDATA, data); |
| 1527 | |
| 1528 | cmd = index; |
| 1529 | cmd |= (port << PCIE2CIO_CMD_PORT_SHIFT) & PCIE2CIO_CMD_PORT_MASK; |
| 1530 | cmd |= (cs << PCIE2CIO_CMD_CS_SHIFT) & PCIE2CIO_CMD_CS_MASK; |
| 1531 | cmd |= PCIE2CIO_CMD_WRITE | PCIE2CIO_CMD_START; |
| 1532 | pci_write_config_dword(pdev, vnd_cap + PCIE2CIO_CMD, cmd); |
| 1533 | |
| 1534 | return pci2cio_wait_completion(icm, 5000); |
| 1535 | } |
| 1536 | |
| 1537 | static int icm_firmware_reset(struct tb *tb, struct tb_nhi *nhi) |
| 1538 | { |
| 1539 | struct icm *icm = tb_priv(tb); |
| 1540 | u32 val; |
| 1541 | |
Mika Westerberg | ea9d7bb | 2018-03-09 13:17:01 +0300 | [diff] [blame] | 1542 | if (!icm->upstream_port) |
| 1543 | return -ENODEV; |
| 1544 | |
Mika Westerberg | f67cf49 | 2017-06-06 15:25:16 +0300 | [diff] [blame] | 1545 | /* Put ARC to wait for CIO reset event to happen */ |
| 1546 | val = ioread32(nhi->iobase + REG_FW_STS); |
| 1547 | val |= REG_FW_STS_CIO_RESET_REQ; |
| 1548 | iowrite32(val, nhi->iobase + REG_FW_STS); |
| 1549 | |
| 1550 | /* Re-start ARC */ |
| 1551 | val = ioread32(nhi->iobase + REG_FW_STS); |
| 1552 | val |= REG_FW_STS_ICM_EN_INVERT; |
| 1553 | val |= REG_FW_STS_ICM_EN_CPU; |
| 1554 | iowrite32(val, nhi->iobase + REG_FW_STS); |
| 1555 | |
| 1556 | /* Trigger CIO reset now */ |
| 1557 | return pcie2cio_write(icm, TB_CFG_SWITCH, 0, 0x50, BIT(9)); |
| 1558 | } |
| 1559 | |
| 1560 | static int icm_firmware_start(struct tb *tb, struct tb_nhi *nhi) |
| 1561 | { |
| 1562 | unsigned int retries = 10; |
| 1563 | int ret; |
| 1564 | u32 val; |
| 1565 | |
| 1566 | /* Check if the ICM firmware is already running */ |
| 1567 | val = ioread32(nhi->iobase + REG_FW_STS); |
| 1568 | if (val & REG_FW_STS_ICM_EN) |
| 1569 | return 0; |
| 1570 | |
| 1571 | dev_info(&nhi->pdev->dev, "starting ICM firmware\n"); |
| 1572 | |
| 1573 | ret = icm_firmware_reset(tb, nhi); |
| 1574 | if (ret) |
| 1575 | return ret; |
| 1576 | |
| 1577 | /* Wait until the ICM firmware tells us it is up and running */ |
| 1578 | do { |
| 1579 | /* Check that the ICM firmware is running */ |
| 1580 | val = ioread32(nhi->iobase + REG_FW_STS); |
| 1581 | if (val & REG_FW_STS_NVM_AUTH_DONE) |
| 1582 | return 0; |
| 1583 | |
| 1584 | msleep(300); |
| 1585 | } while (--retries); |
| 1586 | |
| 1587 | return -ETIMEDOUT; |
| 1588 | } |
| 1589 | |
| 1590 | static int icm_reset_phy_port(struct tb *tb, int phy_port) |
| 1591 | { |
| 1592 | struct icm *icm = tb_priv(tb); |
| 1593 | u32 state0, state1; |
| 1594 | int port0, port1; |
| 1595 | u32 val0, val1; |
| 1596 | int ret; |
| 1597 | |
| 1598 | if (!icm->upstream_port) |
| 1599 | return 0; |
| 1600 | |
| 1601 | if (phy_port) { |
| 1602 | port0 = 3; |
| 1603 | port1 = 4; |
| 1604 | } else { |
| 1605 | port0 = 1; |
| 1606 | port1 = 2; |
| 1607 | } |
| 1608 | |
| 1609 | /* |
| 1610 | * Read link status of both null ports belonging to a single |
| 1611 | * physical port. |
| 1612 | */ |
| 1613 | ret = pcie2cio_read(icm, TB_CFG_PORT, port0, PHY_PORT_CS1, &val0); |
| 1614 | if (ret) |
| 1615 | return ret; |
| 1616 | ret = pcie2cio_read(icm, TB_CFG_PORT, port1, PHY_PORT_CS1, &val1); |
| 1617 | if (ret) |
| 1618 | return ret; |
| 1619 | |
| 1620 | state0 = val0 & PHY_PORT_CS1_LINK_STATE_MASK; |
| 1621 | state0 >>= PHY_PORT_CS1_LINK_STATE_SHIFT; |
| 1622 | state1 = val1 & PHY_PORT_CS1_LINK_STATE_MASK; |
| 1623 | state1 >>= PHY_PORT_CS1_LINK_STATE_SHIFT; |
| 1624 | |
| 1625 | /* If they are both up we need to reset them now */ |
| 1626 | if (state0 != TB_PORT_UP || state1 != TB_PORT_UP) |
| 1627 | return 0; |
| 1628 | |
| 1629 | val0 |= PHY_PORT_CS1_LINK_DISABLE; |
| 1630 | ret = pcie2cio_write(icm, TB_CFG_PORT, port0, PHY_PORT_CS1, val0); |
| 1631 | if (ret) |
| 1632 | return ret; |
| 1633 | |
| 1634 | val1 |= PHY_PORT_CS1_LINK_DISABLE; |
| 1635 | ret = pcie2cio_write(icm, TB_CFG_PORT, port1, PHY_PORT_CS1, val1); |
| 1636 | if (ret) |
| 1637 | return ret; |
| 1638 | |
| 1639 | /* Wait a bit and then re-enable both ports */ |
| 1640 | usleep_range(10, 100); |
| 1641 | |
| 1642 | ret = pcie2cio_read(icm, TB_CFG_PORT, port0, PHY_PORT_CS1, &val0); |
| 1643 | if (ret) |
| 1644 | return ret; |
| 1645 | ret = pcie2cio_read(icm, TB_CFG_PORT, port1, PHY_PORT_CS1, &val1); |
| 1646 | if (ret) |
| 1647 | return ret; |
| 1648 | |
| 1649 | val0 &= ~PHY_PORT_CS1_LINK_DISABLE; |
| 1650 | ret = pcie2cio_write(icm, TB_CFG_PORT, port0, PHY_PORT_CS1, val0); |
| 1651 | if (ret) |
| 1652 | return ret; |
| 1653 | |
| 1654 | val1 &= ~PHY_PORT_CS1_LINK_DISABLE; |
| 1655 | return pcie2cio_write(icm, TB_CFG_PORT, port1, PHY_PORT_CS1, val1); |
| 1656 | } |
| 1657 | |
| 1658 | static int icm_firmware_init(struct tb *tb) |
| 1659 | { |
| 1660 | struct icm *icm = tb_priv(tb); |
| 1661 | struct tb_nhi *nhi = tb->nhi; |
| 1662 | int ret; |
| 1663 | |
| 1664 | ret = icm_firmware_start(tb, nhi); |
| 1665 | if (ret) { |
| 1666 | dev_err(&nhi->pdev->dev, "could not start ICM firmware\n"); |
| 1667 | return ret; |
| 1668 | } |
| 1669 | |
| 1670 | if (icm->get_mode) { |
| 1671 | ret = icm->get_mode(tb); |
| 1672 | |
| 1673 | switch (ret) { |
Mika Westerberg | e6b245c | 2017-06-06 15:25:17 +0300 | [diff] [blame] | 1674 | case NHI_FW_SAFE_MODE: |
| 1675 | icm->safe_mode = true; |
| 1676 | break; |
| 1677 | |
Mika Westerberg | f67cf49 | 2017-06-06 15:25:16 +0300 | [diff] [blame] | 1678 | case NHI_FW_CM_MODE: |
| 1679 | /* Ask ICM to accept all Thunderbolt devices */ |
| 1680 | nhi_mailbox_cmd(nhi, NHI_MAILBOX_ALLOW_ALL_DEVS, 0); |
| 1681 | break; |
| 1682 | |
| 1683 | default: |
Mika Westerberg | e4be8c9 | 2017-11-24 17:51:12 +0300 | [diff] [blame] | 1684 | if (ret < 0) |
| 1685 | return ret; |
| 1686 | |
Mika Westerberg | f67cf49 | 2017-06-06 15:25:16 +0300 | [diff] [blame] | 1687 | tb_err(tb, "ICM firmware is in wrong mode: %u\n", ret); |
| 1688 | return -ENODEV; |
| 1689 | } |
| 1690 | } |
| 1691 | |
| 1692 | /* |
| 1693 | * Reset both physical ports if there is anything connected to |
| 1694 | * them already. |
| 1695 | */ |
| 1696 | ret = icm_reset_phy_port(tb, 0); |
| 1697 | if (ret) |
| 1698 | dev_warn(&nhi->pdev->dev, "failed to reset links on port0\n"); |
| 1699 | ret = icm_reset_phy_port(tb, 1); |
| 1700 | if (ret) |
| 1701 | dev_warn(&nhi->pdev->dev, "failed to reset links on port1\n"); |
| 1702 | |
| 1703 | return 0; |
| 1704 | } |
| 1705 | |
| 1706 | static int icm_driver_ready(struct tb *tb) |
| 1707 | { |
Mika Westerberg | e6b245c | 2017-06-06 15:25:17 +0300 | [diff] [blame] | 1708 | struct icm *icm = tb_priv(tb); |
Mika Westerberg | f67cf49 | 2017-06-06 15:25:16 +0300 | [diff] [blame] | 1709 | int ret; |
| 1710 | |
| 1711 | ret = icm_firmware_init(tb); |
| 1712 | if (ret) |
| 1713 | return ret; |
| 1714 | |
Mika Westerberg | e6b245c | 2017-06-06 15:25:17 +0300 | [diff] [blame] | 1715 | if (icm->safe_mode) { |
| 1716 | tb_info(tb, "Thunderbolt host controller is in safe mode.\n"); |
| 1717 | tb_info(tb, "You need to update NVM firmware of the controller before it can be used.\n"); |
| 1718 | tb_info(tb, "For latest updates check https://thunderbolttechnology.net/updates.\n"); |
| 1719 | return 0; |
| 1720 | } |
| 1721 | |
Mika Westerberg | 2d8ff0b | 2018-07-25 11:48:39 +0300 | [diff] [blame] | 1722 | ret = __icm_driver_ready(tb, &tb->security_level, &tb->nboot_acl, |
| 1723 | &icm->rpm); |
Mika Westerberg | 9aaa3b8 | 2018-01-21 12:08:04 +0200 | [diff] [blame] | 1724 | if (ret) |
| 1725 | return ret; |
| 1726 | |
| 1727 | /* |
| 1728 | * Make sure the number of supported preboot ACL matches what we |
| 1729 | * expect or disable the whole feature. |
| 1730 | */ |
| 1731 | if (tb->nboot_acl > icm->max_boot_acl) |
| 1732 | tb->nboot_acl = 0; |
| 1733 | |
| 1734 | return 0; |
Mika Westerberg | f67cf49 | 2017-06-06 15:25:16 +0300 | [diff] [blame] | 1735 | } |
| 1736 | |
| 1737 | static int icm_suspend(struct tb *tb) |
| 1738 | { |
Mika Westerberg | d04522fa | 2018-07-25 11:03:19 +0300 | [diff] [blame] | 1739 | struct icm *icm = tb_priv(tb); |
Rafael J. Wysocki | a684c5b | 2017-07-25 01:31:00 +0200 | [diff] [blame] | 1740 | |
Mika Westerberg | d04522fa | 2018-07-25 11:03:19 +0300 | [diff] [blame] | 1741 | if (icm->save_devices) |
| 1742 | icm->save_devices(tb); |
Rafael J. Wysocki | a684c5b | 2017-07-25 01:31:00 +0200 | [diff] [blame] | 1743 | |
Mika Westerberg | d04522fa | 2018-07-25 11:03:19 +0300 | [diff] [blame] | 1744 | nhi_mailbox_cmd(tb->nhi, NHI_MAILBOX_DRV_UNLOADS, 0); |
Rafael J. Wysocki | a684c5b | 2017-07-25 01:31:00 +0200 | [diff] [blame] | 1745 | return 0; |
Mika Westerberg | f67cf49 | 2017-06-06 15:25:16 +0300 | [diff] [blame] | 1746 | } |
| 1747 | |
| 1748 | /* |
| 1749 | * Mark all switches (except root switch) below this one unplugged. ICM |
| 1750 | * firmware will send us an updated list of switches after we have send |
| 1751 | * it driver ready command. If a switch is not in that list it will be |
| 1752 | * removed when we perform rescan. |
| 1753 | */ |
| 1754 | static void icm_unplug_children(struct tb_switch *sw) |
| 1755 | { |
| 1756 | unsigned int i; |
| 1757 | |
| 1758 | if (tb_route(sw)) |
| 1759 | sw->is_unplugged = true; |
| 1760 | |
| 1761 | for (i = 1; i <= sw->config.max_port_number; i++) { |
| 1762 | struct tb_port *port = &sw->ports[i]; |
| 1763 | |
| 1764 | if (tb_is_upstream_port(port)) |
| 1765 | continue; |
Mika Westerberg | d1ff702 | 2017-10-02 13:38:34 +0300 | [diff] [blame] | 1766 | if (port->xdomain) { |
| 1767 | port->xdomain->is_unplugged = true; |
| 1768 | continue; |
| 1769 | } |
Mika Westerberg | f67cf49 | 2017-06-06 15:25:16 +0300 | [diff] [blame] | 1770 | if (!port->remote) |
| 1771 | continue; |
| 1772 | |
| 1773 | icm_unplug_children(port->remote->sw); |
| 1774 | } |
| 1775 | } |
| 1776 | |
| 1777 | static void icm_free_unplugged_children(struct tb_switch *sw) |
| 1778 | { |
| 1779 | unsigned int i; |
| 1780 | |
| 1781 | for (i = 1; i <= sw->config.max_port_number; i++) { |
| 1782 | struct tb_port *port = &sw->ports[i]; |
| 1783 | |
| 1784 | if (tb_is_upstream_port(port)) |
| 1785 | continue; |
Mika Westerberg | d1ff702 | 2017-10-02 13:38:34 +0300 | [diff] [blame] | 1786 | |
| 1787 | if (port->xdomain && port->xdomain->is_unplugged) { |
| 1788 | tb_xdomain_remove(port->xdomain); |
| 1789 | port->xdomain = NULL; |
| 1790 | continue; |
| 1791 | } |
| 1792 | |
Mika Westerberg | f67cf49 | 2017-06-06 15:25:16 +0300 | [diff] [blame] | 1793 | if (!port->remote) |
| 1794 | continue; |
| 1795 | |
| 1796 | if (port->remote->sw->is_unplugged) { |
| 1797 | tb_switch_remove(port->remote->sw); |
| 1798 | port->remote = NULL; |
| 1799 | } else { |
| 1800 | icm_free_unplugged_children(port->remote->sw); |
| 1801 | } |
| 1802 | } |
| 1803 | } |
| 1804 | |
| 1805 | static void icm_rescan_work(struct work_struct *work) |
| 1806 | { |
| 1807 | struct icm *icm = container_of(work, struct icm, rescan_work.work); |
| 1808 | struct tb *tb = icm_to_tb(icm); |
| 1809 | |
| 1810 | mutex_lock(&tb->lock); |
| 1811 | if (tb->root_switch) |
| 1812 | icm_free_unplugged_children(tb->root_switch); |
| 1813 | mutex_unlock(&tb->lock); |
| 1814 | } |
| 1815 | |
| 1816 | static void icm_complete(struct tb *tb) |
| 1817 | { |
| 1818 | struct icm *icm = tb_priv(tb); |
| 1819 | |
| 1820 | if (tb->nhi->going_away) |
| 1821 | return; |
| 1822 | |
| 1823 | icm_unplug_children(tb->root_switch); |
| 1824 | |
| 1825 | /* |
| 1826 | * Now all existing children should be resumed, start events |
| 1827 | * from ICM to get updated status. |
| 1828 | */ |
Mika Westerberg | 2d8ff0b | 2018-07-25 11:48:39 +0300 | [diff] [blame] | 1829 | __icm_driver_ready(tb, NULL, NULL, NULL); |
Mika Westerberg | f67cf49 | 2017-06-06 15:25:16 +0300 | [diff] [blame] | 1830 | |
| 1831 | /* |
| 1832 | * We do not get notifications of devices that have been |
| 1833 | * unplugged during suspend so schedule rescan to clean them up |
| 1834 | * if any. |
| 1835 | */ |
| 1836 | queue_delayed_work(tb->wq, &icm->rescan_work, msecs_to_jiffies(500)); |
| 1837 | } |
| 1838 | |
Mika Westerberg | 2d8ff0b | 2018-07-25 11:48:39 +0300 | [diff] [blame] | 1839 | static int icm_runtime_suspend(struct tb *tb) |
| 1840 | { |
| 1841 | nhi_mailbox_cmd(tb->nhi, NHI_MAILBOX_DRV_UNLOADS, 0); |
| 1842 | return 0; |
| 1843 | } |
| 1844 | |
| 1845 | static int icm_runtime_resume(struct tb *tb) |
| 1846 | { |
| 1847 | /* |
| 1848 | * We can reuse the same resume functionality than with system |
| 1849 | * suspend. |
| 1850 | */ |
| 1851 | icm_complete(tb); |
| 1852 | return 0; |
| 1853 | } |
| 1854 | |
Mika Westerberg | f67cf49 | 2017-06-06 15:25:16 +0300 | [diff] [blame] | 1855 | static int icm_start(struct tb *tb) |
| 1856 | { |
Mika Westerberg | e6b245c | 2017-06-06 15:25:17 +0300 | [diff] [blame] | 1857 | struct icm *icm = tb_priv(tb); |
Mika Westerberg | f67cf49 | 2017-06-06 15:25:16 +0300 | [diff] [blame] | 1858 | int ret; |
| 1859 | |
Mika Westerberg | e6b245c | 2017-06-06 15:25:17 +0300 | [diff] [blame] | 1860 | if (icm->safe_mode) |
| 1861 | tb->root_switch = tb_switch_alloc_safe_mode(tb, &tb->dev, 0); |
| 1862 | else |
| 1863 | tb->root_switch = tb_switch_alloc(tb, &tb->dev, 0); |
Mika Westerberg | f67cf49 | 2017-06-06 15:25:16 +0300 | [diff] [blame] | 1864 | if (!tb->root_switch) |
| 1865 | return -ENODEV; |
| 1866 | |
Mika Westerberg | e6b245c | 2017-06-06 15:25:17 +0300 | [diff] [blame] | 1867 | /* |
| 1868 | * NVM upgrade has not been tested on Apple systems and they |
| 1869 | * don't provide images publicly either. To be on the safe side |
| 1870 | * prevent root switch NVM upgrade on Macs for now. |
| 1871 | */ |
Lukas Wunner | 630b3af | 2017-08-01 14:10:41 +0200 | [diff] [blame] | 1872 | tb->root_switch->no_nvm_upgrade = x86_apple_machine; |
Mika Westerberg | 2d8ff0b | 2018-07-25 11:48:39 +0300 | [diff] [blame] | 1873 | tb->root_switch->rpm = icm->rpm; |
Mika Westerberg | e6b245c | 2017-06-06 15:25:17 +0300 | [diff] [blame] | 1874 | |
Mika Westerberg | f67cf49 | 2017-06-06 15:25:16 +0300 | [diff] [blame] | 1875 | ret = tb_switch_add(tb->root_switch); |
Mika Westerberg | d1ff702 | 2017-10-02 13:38:34 +0300 | [diff] [blame] | 1876 | if (ret) { |
Mika Westerberg | f67cf49 | 2017-06-06 15:25:16 +0300 | [diff] [blame] | 1877 | tb_switch_put(tb->root_switch); |
Mika Westerberg | d1ff702 | 2017-10-02 13:38:34 +0300 | [diff] [blame] | 1878 | tb->root_switch = NULL; |
| 1879 | } |
Mika Westerberg | f67cf49 | 2017-06-06 15:25:16 +0300 | [diff] [blame] | 1880 | |
| 1881 | return ret; |
| 1882 | } |
| 1883 | |
| 1884 | static void icm_stop(struct tb *tb) |
| 1885 | { |
| 1886 | struct icm *icm = tb_priv(tb); |
| 1887 | |
| 1888 | cancel_delayed_work(&icm->rescan_work); |
| 1889 | tb_switch_remove(tb->root_switch); |
| 1890 | tb->root_switch = NULL; |
| 1891 | nhi_mailbox_cmd(tb->nhi, NHI_MAILBOX_DRV_UNLOADS, 0); |
| 1892 | } |
| 1893 | |
Mika Westerberg | e6b245c | 2017-06-06 15:25:17 +0300 | [diff] [blame] | 1894 | static int icm_disconnect_pcie_paths(struct tb *tb) |
| 1895 | { |
| 1896 | return nhi_mailbox_cmd(tb->nhi, NHI_MAILBOX_DISCONNECT_PCIE_PATHS, 0); |
| 1897 | } |
| 1898 | |
Mika Westerberg | 9aaa3b8 | 2018-01-21 12:08:04 +0200 | [diff] [blame] | 1899 | /* Falcon Ridge */ |
Mika Westerberg | f67cf49 | 2017-06-06 15:25:16 +0300 | [diff] [blame] | 1900 | static const struct tb_cm_ops icm_fr_ops = { |
| 1901 | .driver_ready = icm_driver_ready, |
| 1902 | .start = icm_start, |
| 1903 | .stop = icm_stop, |
| 1904 | .suspend = icm_suspend, |
| 1905 | .complete = icm_complete, |
| 1906 | .handle_event = icm_handle_event, |
| 1907 | .approve_switch = icm_fr_approve_switch, |
| 1908 | .add_switch_key = icm_fr_add_switch_key, |
| 1909 | .challenge_switch_key = icm_fr_challenge_switch_key, |
Mika Westerberg | e6b245c | 2017-06-06 15:25:17 +0300 | [diff] [blame] | 1910 | .disconnect_pcie_paths = icm_disconnect_pcie_paths, |
Mika Westerberg | d1ff702 | 2017-10-02 13:38:34 +0300 | [diff] [blame] | 1911 | .approve_xdomain_paths = icm_fr_approve_xdomain_paths, |
| 1912 | .disconnect_xdomain_paths = icm_fr_disconnect_xdomain_paths, |
Mika Westerberg | f67cf49 | 2017-06-06 15:25:16 +0300 | [diff] [blame] | 1913 | }; |
| 1914 | |
Mika Westerberg | 9aaa3b8 | 2018-01-21 12:08:04 +0200 | [diff] [blame] | 1915 | /* Alpine Ridge */ |
| 1916 | static const struct tb_cm_ops icm_ar_ops = { |
| 1917 | .driver_ready = icm_driver_ready, |
| 1918 | .start = icm_start, |
| 1919 | .stop = icm_stop, |
| 1920 | .suspend = icm_suspend, |
| 1921 | .complete = icm_complete, |
Mika Westerberg | 2d8ff0b | 2018-07-25 11:48:39 +0300 | [diff] [blame] | 1922 | .runtime_suspend = icm_runtime_suspend, |
| 1923 | .runtime_resume = icm_runtime_resume, |
Mika Westerberg | 9aaa3b8 | 2018-01-21 12:08:04 +0200 | [diff] [blame] | 1924 | .handle_event = icm_handle_event, |
| 1925 | .get_boot_acl = icm_ar_get_boot_acl, |
| 1926 | .set_boot_acl = icm_ar_set_boot_acl, |
| 1927 | .approve_switch = icm_fr_approve_switch, |
| 1928 | .add_switch_key = icm_fr_add_switch_key, |
| 1929 | .challenge_switch_key = icm_fr_challenge_switch_key, |
| 1930 | .disconnect_pcie_paths = icm_disconnect_pcie_paths, |
| 1931 | .approve_xdomain_paths = icm_fr_approve_xdomain_paths, |
| 1932 | .disconnect_xdomain_paths = icm_fr_disconnect_xdomain_paths, |
| 1933 | }; |
| 1934 | |
Radion Mirchevsky | 4bac471 | 2017-10-04 16:43:43 +0300 | [diff] [blame] | 1935 | /* Titan Ridge */ |
| 1936 | static const struct tb_cm_ops icm_tr_ops = { |
| 1937 | .driver_ready = icm_driver_ready, |
| 1938 | .start = icm_start, |
| 1939 | .stop = icm_stop, |
| 1940 | .suspend = icm_suspend, |
| 1941 | .complete = icm_complete, |
Mika Westerberg | 2d8ff0b | 2018-07-25 11:48:39 +0300 | [diff] [blame] | 1942 | .runtime_suspend = icm_runtime_suspend, |
| 1943 | .runtime_resume = icm_runtime_resume, |
Radion Mirchevsky | 4bac471 | 2017-10-04 16:43:43 +0300 | [diff] [blame] | 1944 | .handle_event = icm_handle_event, |
| 1945 | .get_boot_acl = icm_ar_get_boot_acl, |
| 1946 | .set_boot_acl = icm_ar_set_boot_acl, |
| 1947 | .approve_switch = icm_tr_approve_switch, |
| 1948 | .add_switch_key = icm_tr_add_switch_key, |
| 1949 | .challenge_switch_key = icm_tr_challenge_switch_key, |
| 1950 | .disconnect_pcie_paths = icm_disconnect_pcie_paths, |
| 1951 | .approve_xdomain_paths = icm_tr_approve_xdomain_paths, |
| 1952 | .disconnect_xdomain_paths = icm_tr_disconnect_xdomain_paths, |
| 1953 | }; |
| 1954 | |
Mika Westerberg | f67cf49 | 2017-06-06 15:25:16 +0300 | [diff] [blame] | 1955 | struct tb *icm_probe(struct tb_nhi *nhi) |
| 1956 | { |
| 1957 | struct icm *icm; |
| 1958 | struct tb *tb; |
| 1959 | |
| 1960 | tb = tb_domain_alloc(nhi, sizeof(struct icm)); |
| 1961 | if (!tb) |
| 1962 | return NULL; |
| 1963 | |
| 1964 | icm = tb_priv(tb); |
| 1965 | INIT_DELAYED_WORK(&icm->rescan_work, icm_rescan_work); |
| 1966 | mutex_init(&icm->request_lock); |
| 1967 | |
| 1968 | switch (nhi->pdev->device) { |
| 1969 | case PCI_DEVICE_ID_INTEL_FALCON_RIDGE_2C_NHI: |
| 1970 | case PCI_DEVICE_ID_INTEL_FALCON_RIDGE_4C_NHI: |
| 1971 | icm->is_supported = icm_fr_is_supported; |
| 1972 | icm->get_route = icm_fr_get_route; |
Mika Westerberg | d04522fa | 2018-07-25 11:03:19 +0300 | [diff] [blame] | 1973 | icm->save_devices = icm_fr_save_devices; |
Mika Westerberg | 3080e19 | 2017-10-06 18:14:13 +0300 | [diff] [blame] | 1974 | icm->driver_ready = icm_fr_driver_ready; |
Mika Westerberg | f67cf49 | 2017-06-06 15:25:16 +0300 | [diff] [blame] | 1975 | icm->device_connected = icm_fr_device_connected; |
| 1976 | icm->device_disconnected = icm_fr_device_disconnected; |
Mika Westerberg | d1ff702 | 2017-10-02 13:38:34 +0300 | [diff] [blame] | 1977 | icm->xdomain_connected = icm_fr_xdomain_connected; |
| 1978 | icm->xdomain_disconnected = icm_fr_xdomain_disconnected; |
Mika Westerberg | f67cf49 | 2017-06-06 15:25:16 +0300 | [diff] [blame] | 1979 | tb->cm_ops = &icm_fr_ops; |
| 1980 | break; |
| 1981 | |
| 1982 | case PCI_DEVICE_ID_INTEL_ALPINE_RIDGE_2C_NHI: |
| 1983 | case PCI_DEVICE_ID_INTEL_ALPINE_RIDGE_4C_NHI: |
| 1984 | case PCI_DEVICE_ID_INTEL_ALPINE_RIDGE_LP_NHI: |
| 1985 | case PCI_DEVICE_ID_INTEL_ALPINE_RIDGE_C_4C_NHI: |
| 1986 | case PCI_DEVICE_ID_INTEL_ALPINE_RIDGE_C_2C_NHI: |
Mika Westerberg | 9aaa3b8 | 2018-01-21 12:08:04 +0200 | [diff] [blame] | 1987 | icm->max_boot_acl = ICM_AR_PREBOOT_ACL_ENTRIES; |
Mika Westerberg | f67cf49 | 2017-06-06 15:25:16 +0300 | [diff] [blame] | 1988 | icm->is_supported = icm_ar_is_supported; |
| 1989 | icm->get_mode = icm_ar_get_mode; |
| 1990 | icm->get_route = icm_ar_get_route; |
Mika Westerberg | d04522fa | 2018-07-25 11:03:19 +0300 | [diff] [blame] | 1991 | icm->save_devices = icm_fr_save_devices; |
Mika Westerberg | 9aaa3b8 | 2018-01-21 12:08:04 +0200 | [diff] [blame] | 1992 | icm->driver_ready = icm_ar_driver_ready; |
Mika Westerberg | f67cf49 | 2017-06-06 15:25:16 +0300 | [diff] [blame] | 1993 | icm->device_connected = icm_fr_device_connected; |
| 1994 | icm->device_disconnected = icm_fr_device_disconnected; |
Mika Westerberg | d1ff702 | 2017-10-02 13:38:34 +0300 | [diff] [blame] | 1995 | icm->xdomain_connected = icm_fr_xdomain_connected; |
| 1996 | icm->xdomain_disconnected = icm_fr_xdomain_disconnected; |
Mika Westerberg | 9aaa3b8 | 2018-01-21 12:08:04 +0200 | [diff] [blame] | 1997 | tb->cm_ops = &icm_ar_ops; |
Mika Westerberg | f67cf49 | 2017-06-06 15:25:16 +0300 | [diff] [blame] | 1998 | break; |
Radion Mirchevsky | 4bac471 | 2017-10-04 16:43:43 +0300 | [diff] [blame] | 1999 | |
| 2000 | case PCI_DEVICE_ID_INTEL_TITAN_RIDGE_2C_NHI: |
| 2001 | case PCI_DEVICE_ID_INTEL_TITAN_RIDGE_4C_NHI: |
| 2002 | icm->max_boot_acl = ICM_AR_PREBOOT_ACL_ENTRIES; |
| 2003 | icm->is_supported = icm_ar_is_supported; |
| 2004 | icm->get_mode = icm_ar_get_mode; |
| 2005 | icm->driver_ready = icm_tr_driver_ready; |
| 2006 | icm->device_connected = icm_tr_device_connected; |
| 2007 | icm->device_disconnected = icm_tr_device_disconnected; |
| 2008 | icm->xdomain_connected = icm_tr_xdomain_connected; |
| 2009 | icm->xdomain_disconnected = icm_tr_xdomain_disconnected; |
| 2010 | tb->cm_ops = &icm_tr_ops; |
| 2011 | break; |
Mika Westerberg | f67cf49 | 2017-06-06 15:25:16 +0300 | [diff] [blame] | 2012 | } |
| 2013 | |
| 2014 | if (!icm->is_supported || !icm->is_supported(tb)) { |
| 2015 | dev_dbg(&nhi->pdev->dev, "ICM not supported on this controller\n"); |
| 2016 | tb_domain_put(tb); |
| 2017 | return NULL; |
| 2018 | } |
| 2019 | |
| 2020 | return tb; |
| 2021 | } |