1 // SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0 2 /* Copyright (c) 2015-2018 Mellanox Technologies. All rights reserved */ 3 4 #include <linux/kernel.h> 5 #include <linux/module.h> 6 #include <linux/device.h> 7 #include <linux/export.h> 8 #include <linux/err.h> 9 #include <linux/if_link.h> 10 #include <linux/netdevice.h> 11 #include <linux/completion.h> 12 #include <linux/skbuff.h> 13 #include <linux/etherdevice.h> 14 #include <linux/types.h> 15 #include <linux/string.h> 16 #include <linux/gfp.h> 17 #include <linux/random.h> 18 #include <linux/jiffies.h> 19 #include <linux/mutex.h> 20 #include <linux/rcupdate.h> 21 #include <linux/slab.h> 22 #include <linux/workqueue.h> 23 #include <asm/byteorder.h> 24 #include <net/devlink.h> 25 #include <trace/events/devlink.h> 26 27 #include "core.h" 28 #include "item.h" 29 #include "cmd.h" 30 #include "port.h" 31 #include "trap.h" 32 #include "emad.h" 33 #include "reg.h" 34 #include "resources.h" 35 36 static LIST_HEAD(mlxsw_core_driver_list); 37 static DEFINE_SPINLOCK(mlxsw_core_driver_list_lock); 38 39 static const char mlxsw_core_driver_name[] = "mlxsw_core"; 40 41 static struct workqueue_struct *mlxsw_wq; 42 static struct workqueue_struct *mlxsw_owq; 43 44 struct mlxsw_core_port { 45 struct devlink_port devlink_port; 46 void *port_driver_priv; 47 u8 local_port; 48 }; 49 50 void *mlxsw_core_port_driver_priv(struct mlxsw_core_port *mlxsw_core_port) 51 { 52 return mlxsw_core_port->port_driver_priv; 53 } 54 EXPORT_SYMBOL(mlxsw_core_port_driver_priv); 55 56 static bool mlxsw_core_port_check(struct mlxsw_core_port *mlxsw_core_port) 57 { 58 return mlxsw_core_port->port_driver_priv != NULL; 59 } 60 61 struct mlxsw_core { 62 struct mlxsw_driver *driver; 63 const struct mlxsw_bus *bus; 64 void *bus_priv; 65 const struct mlxsw_bus_info *bus_info; 66 struct workqueue_struct *emad_wq; 67 struct list_head rx_listener_list; 68 struct list_head event_listener_list; 69 struct { 70 atomic64_t tid; 71 struct list_head trans_list; 72 spinlock_t trans_list_lock; /* protects trans_list writes */ 73 bool use_emad; 74 } emad; 75 struct { 76 u8 *mapping; /* lag_id+port_index to local_port mapping */ 77 } lag; 78 struct mlxsw_res res; 79 struct mlxsw_hwmon *hwmon; 80 struct mlxsw_thermal *thermal; 81 struct mlxsw_core_port *ports; 82 unsigned int max_ports; 83 bool reload_fail; 84 bool fw_flash_in_progress; 85 unsigned long driver_priv[0]; 86 /* driver_priv has to be always the last item */ 87 }; 88 89 #define MLXSW_PORT_MAX_PORTS_DEFAULT 0x40 90 91 static int mlxsw_ports_init(struct mlxsw_core *mlxsw_core) 92 { 93 /* Switch ports are numbered from 1 to queried value */ 94 if (MLXSW_CORE_RES_VALID(mlxsw_core, MAX_SYSTEM_PORT)) 95 mlxsw_core->max_ports = MLXSW_CORE_RES_GET(mlxsw_core, 96 MAX_SYSTEM_PORT) + 1; 97 else 98 mlxsw_core->max_ports = MLXSW_PORT_MAX_PORTS_DEFAULT + 1; 99 100 mlxsw_core->ports = kcalloc(mlxsw_core->max_ports, 101 sizeof(struct mlxsw_core_port), GFP_KERNEL); 102 if (!mlxsw_core->ports) 103 return -ENOMEM; 104 105 return 0; 106 } 107 108 static void mlxsw_ports_fini(struct mlxsw_core *mlxsw_core) 109 { 110 kfree(mlxsw_core->ports); 111 } 112 113 unsigned int mlxsw_core_max_ports(const struct mlxsw_core *mlxsw_core) 114 { 115 return mlxsw_core->max_ports; 116 } 117 EXPORT_SYMBOL(mlxsw_core_max_ports); 118 119 void *mlxsw_core_driver_priv(struct mlxsw_core *mlxsw_core) 120 { 121 return mlxsw_core->driver_priv; 122 } 123 EXPORT_SYMBOL(mlxsw_core_driver_priv); 124 125 struct mlxsw_rx_listener_item { 126 struct list_head list; 127 struct mlxsw_rx_listener rxl; 128 void *priv; 129 }; 130 131 struct mlxsw_event_listener_item { 132 struct list_head list; 133 struct mlxsw_event_listener el; 134 void *priv; 135 }; 136 137 /****************** 138 * EMAD processing 139 ******************/ 140 141 /* emad_eth_hdr_dmac 142 * Destination MAC in EMAD's Ethernet header. 143 * Must be set to 01:02:c9:00:00:01 144 */ 145 MLXSW_ITEM_BUF(emad, eth_hdr, dmac, 0x00, 6); 146 147 /* emad_eth_hdr_smac 148 * Source MAC in EMAD's Ethernet header. 149 * Must be set to 00:02:c9:01:02:03 150 */ 151 MLXSW_ITEM_BUF(emad, eth_hdr, smac, 0x06, 6); 152 153 /* emad_eth_hdr_ethertype 154 * Ethertype in EMAD's Ethernet header. 155 * Must be set to 0x8932 156 */ 157 MLXSW_ITEM32(emad, eth_hdr, ethertype, 0x0C, 16, 16); 158 159 /* emad_eth_hdr_mlx_proto 160 * Mellanox protocol. 161 * Must be set to 0x0. 162 */ 163 MLXSW_ITEM32(emad, eth_hdr, mlx_proto, 0x0C, 8, 8); 164 165 /* emad_eth_hdr_ver 166 * Mellanox protocol version. 167 * Must be set to 0x0. 168 */ 169 MLXSW_ITEM32(emad, eth_hdr, ver, 0x0C, 4, 4); 170 171 /* emad_op_tlv_type 172 * Type of the TLV. 173 * Must be set to 0x1 (operation TLV). 174 */ 175 MLXSW_ITEM32(emad, op_tlv, type, 0x00, 27, 5); 176 177 /* emad_op_tlv_len 178 * Length of the operation TLV in u32. 179 * Must be set to 0x4. 180 */ 181 MLXSW_ITEM32(emad, op_tlv, len, 0x00, 16, 11); 182 183 /* emad_op_tlv_dr 184 * Direct route bit. Setting to 1 indicates the EMAD is a direct route 185 * EMAD. DR TLV must follow. 186 * 187 * Note: Currently not supported and must not be set. 188 */ 189 MLXSW_ITEM32(emad, op_tlv, dr, 0x00, 15, 1); 190 191 /* emad_op_tlv_status 192 * Returned status in case of EMAD response. Must be set to 0 in case 193 * of EMAD request. 194 * 0x0 - success 195 * 0x1 - device is busy. Requester should retry 196 * 0x2 - Mellanox protocol version not supported 197 * 0x3 - unknown TLV 198 * 0x4 - register not supported 199 * 0x5 - operation class not supported 200 * 0x6 - EMAD method not supported 201 * 0x7 - bad parameter (e.g. port out of range) 202 * 0x8 - resource not available 203 * 0x9 - message receipt acknowledgment. Requester should retry 204 * 0x70 - internal error 205 */ 206 MLXSW_ITEM32(emad, op_tlv, status, 0x00, 8, 7); 207 208 /* emad_op_tlv_register_id 209 * Register ID of register within register TLV. 210 */ 211 MLXSW_ITEM32(emad, op_tlv, register_id, 0x04, 16, 16); 212 213 /* emad_op_tlv_r 214 * Response bit. Setting to 1 indicates Response, otherwise request. 215 */ 216 MLXSW_ITEM32(emad, op_tlv, r, 0x04, 15, 1); 217 218 /* emad_op_tlv_method 219 * EMAD method type. 220 * 0x1 - query 221 * 0x2 - write 222 * 0x3 - send (currently not supported) 223 * 0x4 - event 224 */ 225 MLXSW_ITEM32(emad, op_tlv, method, 0x04, 8, 7); 226 227 /* emad_op_tlv_class 228 * EMAD operation class. Must be set to 0x1 (REG_ACCESS). 229 */ 230 MLXSW_ITEM32(emad, op_tlv, class, 0x04, 0, 8); 231 232 /* emad_op_tlv_tid 233 * EMAD transaction ID. Used for pairing request and response EMADs. 234 */ 235 MLXSW_ITEM64(emad, op_tlv, tid, 0x08, 0, 64); 236 237 /* emad_reg_tlv_type 238 * Type of the TLV. 239 * Must be set to 0x3 (register TLV). 240 */ 241 MLXSW_ITEM32(emad, reg_tlv, type, 0x00, 27, 5); 242 243 /* emad_reg_tlv_len 244 * Length of the operation TLV in u32. 245 */ 246 MLXSW_ITEM32(emad, reg_tlv, len, 0x00, 16, 11); 247 248 /* emad_end_tlv_type 249 * Type of the TLV. 250 * Must be set to 0x0 (end TLV). 251 */ 252 MLXSW_ITEM32(emad, end_tlv, type, 0x00, 27, 5); 253 254 /* emad_end_tlv_len 255 * Length of the end TLV in u32. 256 * Must be set to 1. 257 */ 258 MLXSW_ITEM32(emad, end_tlv, len, 0x00, 16, 11); 259 260 enum mlxsw_core_reg_access_type { 261 MLXSW_CORE_REG_ACCESS_TYPE_QUERY, 262 MLXSW_CORE_REG_ACCESS_TYPE_WRITE, 263 }; 264 265 static inline const char * 266 mlxsw_core_reg_access_type_str(enum mlxsw_core_reg_access_type type) 267 { 268 switch (type) { 269 case MLXSW_CORE_REG_ACCESS_TYPE_QUERY: 270 return "query"; 271 case MLXSW_CORE_REG_ACCESS_TYPE_WRITE: 272 return "write"; 273 } 274 BUG(); 275 } 276 277 static void mlxsw_emad_pack_end_tlv(char *end_tlv) 278 { 279 mlxsw_emad_end_tlv_type_set(end_tlv, MLXSW_EMAD_TLV_TYPE_END); 280 mlxsw_emad_end_tlv_len_set(end_tlv, MLXSW_EMAD_END_TLV_LEN); 281 } 282 283 static void mlxsw_emad_pack_reg_tlv(char *reg_tlv, 284 const struct mlxsw_reg_info *reg, 285 char *payload) 286 { 287 mlxsw_emad_reg_tlv_type_set(reg_tlv, MLXSW_EMAD_TLV_TYPE_REG); 288 mlxsw_emad_reg_tlv_len_set(reg_tlv, reg->len / sizeof(u32) + 1); 289 memcpy(reg_tlv + sizeof(u32), payload, reg->len); 290 } 291 292 static void mlxsw_emad_pack_op_tlv(char *op_tlv, 293 const struct mlxsw_reg_info *reg, 294 enum mlxsw_core_reg_access_type type, 295 u64 tid) 296 { 297 mlxsw_emad_op_tlv_type_set(op_tlv, MLXSW_EMAD_TLV_TYPE_OP); 298 mlxsw_emad_op_tlv_len_set(op_tlv, MLXSW_EMAD_OP_TLV_LEN); 299 mlxsw_emad_op_tlv_dr_set(op_tlv, 0); 300 mlxsw_emad_op_tlv_status_set(op_tlv, 0); 301 mlxsw_emad_op_tlv_register_id_set(op_tlv, reg->id); 302 mlxsw_emad_op_tlv_r_set(op_tlv, MLXSW_EMAD_OP_TLV_REQUEST); 303 if (type == MLXSW_CORE_REG_ACCESS_TYPE_QUERY) 304 mlxsw_emad_op_tlv_method_set(op_tlv, 305 MLXSW_EMAD_OP_TLV_METHOD_QUERY); 306 else 307 mlxsw_emad_op_tlv_method_set(op_tlv, 308 MLXSW_EMAD_OP_TLV_METHOD_WRITE); 309 mlxsw_emad_op_tlv_class_set(op_tlv, 310 MLXSW_EMAD_OP_TLV_CLASS_REG_ACCESS); 311 mlxsw_emad_op_tlv_tid_set(op_tlv, tid); 312 } 313 314 static int mlxsw_emad_construct_eth_hdr(struct sk_buff *skb) 315 { 316 char *eth_hdr = skb_push(skb, MLXSW_EMAD_ETH_HDR_LEN); 317 318 mlxsw_emad_eth_hdr_dmac_memcpy_to(eth_hdr, MLXSW_EMAD_EH_DMAC); 319 mlxsw_emad_eth_hdr_smac_memcpy_to(eth_hdr, MLXSW_EMAD_EH_SMAC); 320 mlxsw_emad_eth_hdr_ethertype_set(eth_hdr, MLXSW_EMAD_EH_ETHERTYPE); 321 mlxsw_emad_eth_hdr_mlx_proto_set(eth_hdr, MLXSW_EMAD_EH_MLX_PROTO); 322 mlxsw_emad_eth_hdr_ver_set(eth_hdr, MLXSW_EMAD_EH_PROTO_VERSION); 323 324 skb_reset_mac_header(skb); 325 326 return 0; 327 } 328 329 static void mlxsw_emad_construct(struct sk_buff *skb, 330 const struct mlxsw_reg_info *reg, 331 char *payload, 332 enum mlxsw_core_reg_access_type type, 333 u64 tid) 334 { 335 char *buf; 336 337 buf = skb_push(skb, MLXSW_EMAD_END_TLV_LEN * sizeof(u32)); 338 mlxsw_emad_pack_end_tlv(buf); 339 340 buf = skb_push(skb, reg->len + sizeof(u32)); 341 mlxsw_emad_pack_reg_tlv(buf, reg, payload); 342 343 buf = skb_push(skb, MLXSW_EMAD_OP_TLV_LEN * sizeof(u32)); 344 mlxsw_emad_pack_op_tlv(buf, reg, type, tid); 345 346 mlxsw_emad_construct_eth_hdr(skb); 347 } 348 349 static char *mlxsw_emad_op_tlv(const struct sk_buff *skb) 350 { 351 return ((char *) (skb->data + MLXSW_EMAD_ETH_HDR_LEN)); 352 } 353 354 static char *mlxsw_emad_reg_tlv(const struct sk_buff *skb) 355 { 356 return ((char *) (skb->data + MLXSW_EMAD_ETH_HDR_LEN + 357 MLXSW_EMAD_OP_TLV_LEN * sizeof(u32))); 358 } 359 360 static char *mlxsw_emad_reg_payload(const char *op_tlv) 361 { 362 return ((char *) (op_tlv + (MLXSW_EMAD_OP_TLV_LEN + 1) * sizeof(u32))); 363 } 364 365 static u64 mlxsw_emad_get_tid(const struct sk_buff *skb) 366 { 367 char *op_tlv; 368 369 op_tlv = mlxsw_emad_op_tlv(skb); 370 return mlxsw_emad_op_tlv_tid_get(op_tlv); 371 } 372 373 static bool mlxsw_emad_is_resp(const struct sk_buff *skb) 374 { 375 char *op_tlv; 376 377 op_tlv = mlxsw_emad_op_tlv(skb); 378 return (mlxsw_emad_op_tlv_r_get(op_tlv) == MLXSW_EMAD_OP_TLV_RESPONSE); 379 } 380 381 static int mlxsw_emad_process_status(char *op_tlv, 382 enum mlxsw_emad_op_tlv_status *p_status) 383 { 384 *p_status = mlxsw_emad_op_tlv_status_get(op_tlv); 385 386 switch (*p_status) { 387 case MLXSW_EMAD_OP_TLV_STATUS_SUCCESS: 388 return 0; 389 case MLXSW_EMAD_OP_TLV_STATUS_BUSY: 390 case MLXSW_EMAD_OP_TLV_STATUS_MESSAGE_RECEIPT_ACK: 391 return -EAGAIN; 392 case MLXSW_EMAD_OP_TLV_STATUS_VERSION_NOT_SUPPORTED: 393 case MLXSW_EMAD_OP_TLV_STATUS_UNKNOWN_TLV: 394 case MLXSW_EMAD_OP_TLV_STATUS_REGISTER_NOT_SUPPORTED: 395 case MLXSW_EMAD_OP_TLV_STATUS_CLASS_NOT_SUPPORTED: 396 case MLXSW_EMAD_OP_TLV_STATUS_METHOD_NOT_SUPPORTED: 397 case MLXSW_EMAD_OP_TLV_STATUS_BAD_PARAMETER: 398 case MLXSW_EMAD_OP_TLV_STATUS_RESOURCE_NOT_AVAILABLE: 399 case MLXSW_EMAD_OP_TLV_STATUS_INTERNAL_ERROR: 400 default: 401 return -EIO; 402 } 403 } 404 405 static int 406 mlxsw_emad_process_status_skb(struct sk_buff *skb, 407 enum mlxsw_emad_op_tlv_status *p_status) 408 { 409 return mlxsw_emad_process_status(mlxsw_emad_op_tlv(skb), p_status); 410 } 411 412 struct mlxsw_reg_trans { 413 struct list_head list; 414 struct list_head bulk_list; 415 struct mlxsw_core *core; 416 struct sk_buff *tx_skb; 417 struct mlxsw_tx_info tx_info; 418 struct delayed_work timeout_dw; 419 unsigned int retries; 420 u64 tid; 421 struct completion completion; 422 atomic_t active; 423 mlxsw_reg_trans_cb_t *cb; 424 unsigned long cb_priv; 425 const struct mlxsw_reg_info *reg; 426 enum mlxsw_core_reg_access_type type; 427 int err; 428 enum mlxsw_emad_op_tlv_status emad_status; 429 struct rcu_head rcu; 430 }; 431 432 #define MLXSW_EMAD_TIMEOUT_DURING_FW_FLASH_MS 3000 433 #define MLXSW_EMAD_TIMEOUT_MS 200 434 435 static void mlxsw_emad_trans_timeout_schedule(struct mlxsw_reg_trans *trans) 436 { 437 unsigned long timeout = msecs_to_jiffies(MLXSW_EMAD_TIMEOUT_MS); 438 439 if (trans->core->fw_flash_in_progress) 440 timeout = msecs_to_jiffies(MLXSW_EMAD_TIMEOUT_DURING_FW_FLASH_MS); 441 442 queue_delayed_work(trans->core->emad_wq, &trans->timeout_dw, timeout); 443 } 444 445 static int mlxsw_emad_transmit(struct mlxsw_core *mlxsw_core, 446 struct mlxsw_reg_trans *trans) 447 { 448 struct sk_buff *skb; 449 int err; 450 451 skb = skb_copy(trans->tx_skb, GFP_KERNEL); 452 if (!skb) 453 return -ENOMEM; 454 455 trace_devlink_hwmsg(priv_to_devlink(mlxsw_core), false, 0, 456 skb->data + mlxsw_core->driver->txhdr_len, 457 skb->len - mlxsw_core->driver->txhdr_len); 458 459 atomic_set(&trans->active, 1); 460 err = mlxsw_core_skb_transmit(mlxsw_core, skb, &trans->tx_info); 461 if (err) { 462 dev_kfree_skb(skb); 463 return err; 464 } 465 mlxsw_emad_trans_timeout_schedule(trans); 466 return 0; 467 } 468 469 static void mlxsw_emad_trans_finish(struct mlxsw_reg_trans *trans, int err) 470 { 471 struct mlxsw_core *mlxsw_core = trans->core; 472 473 dev_kfree_skb(trans->tx_skb); 474 spin_lock_bh(&mlxsw_core->emad.trans_list_lock); 475 list_del_rcu(&trans->list); 476 spin_unlock_bh(&mlxsw_core->emad.trans_list_lock); 477 trans->err = err; 478 complete(&trans->completion); 479 } 480 481 static void mlxsw_emad_transmit_retry(struct mlxsw_core *mlxsw_core, 482 struct mlxsw_reg_trans *trans) 483 { 484 int err; 485 486 if (trans->retries < MLXSW_EMAD_MAX_RETRY) { 487 trans->retries++; 488 err = mlxsw_emad_transmit(trans->core, trans); 489 if (err == 0) 490 return; 491 } else { 492 err = -EIO; 493 } 494 mlxsw_emad_trans_finish(trans, err); 495 } 496 497 static void mlxsw_emad_trans_timeout_work(struct work_struct *work) 498 { 499 struct mlxsw_reg_trans *trans = container_of(work, 500 struct mlxsw_reg_trans, 501 timeout_dw.work); 502 503 if (!atomic_dec_and_test(&trans->active)) 504 return; 505 506 mlxsw_emad_transmit_retry(trans->core, trans); 507 } 508 509 static void mlxsw_emad_process_response(struct mlxsw_core *mlxsw_core, 510 struct mlxsw_reg_trans *trans, 511 struct sk_buff *skb) 512 { 513 int err; 514 515 if (!atomic_dec_and_test(&trans->active)) 516 return; 517 518 err = mlxsw_emad_process_status_skb(skb, &trans->emad_status); 519 if (err == -EAGAIN) { 520 mlxsw_emad_transmit_retry(mlxsw_core, trans); 521 } else { 522 if (err == 0) { 523 char *op_tlv = mlxsw_emad_op_tlv(skb); 524 525 if (trans->cb) 526 trans->cb(mlxsw_core, 527 mlxsw_emad_reg_payload(op_tlv), 528 trans->reg->len, trans->cb_priv); 529 } 530 mlxsw_emad_trans_finish(trans, err); 531 } 532 } 533 534 /* called with rcu read lock held */ 535 static void mlxsw_emad_rx_listener_func(struct sk_buff *skb, u8 local_port, 536 void *priv) 537 { 538 struct mlxsw_core *mlxsw_core = priv; 539 struct mlxsw_reg_trans *trans; 540 541 trace_devlink_hwmsg(priv_to_devlink(mlxsw_core), true, 0, 542 skb->data, skb->len); 543 544 if (!mlxsw_emad_is_resp(skb)) 545 goto free_skb; 546 547 list_for_each_entry_rcu(trans, &mlxsw_core->emad.trans_list, list) { 548 if (mlxsw_emad_get_tid(skb) == trans->tid) { 549 mlxsw_emad_process_response(mlxsw_core, trans, skb); 550 break; 551 } 552 } 553 554 free_skb: 555 dev_kfree_skb(skb); 556 } 557 558 static const struct mlxsw_listener mlxsw_emad_rx_listener = 559 MLXSW_RXL(mlxsw_emad_rx_listener_func, ETHEMAD, TRAP_TO_CPU, false, 560 EMAD, DISCARD); 561 562 static int mlxsw_emad_init(struct mlxsw_core *mlxsw_core) 563 { 564 struct workqueue_struct *emad_wq; 565 u64 tid; 566 int err; 567 568 if (!(mlxsw_core->bus->features & MLXSW_BUS_F_TXRX)) 569 return 0; 570 571 emad_wq = alloc_workqueue("mlxsw_core_emad", WQ_MEM_RECLAIM, 0); 572 if (!emad_wq) 573 return -ENOMEM; 574 mlxsw_core->emad_wq = emad_wq; 575 576 /* Set the upper 32 bits of the transaction ID field to a random 577 * number. This allows us to discard EMADs addressed to other 578 * devices. 579 */ 580 get_random_bytes(&tid, 4); 581 tid <<= 32; 582 atomic64_set(&mlxsw_core->emad.tid, tid); 583 584 INIT_LIST_HEAD(&mlxsw_core->emad.trans_list); 585 spin_lock_init(&mlxsw_core->emad.trans_list_lock); 586 587 err = mlxsw_core_trap_register(mlxsw_core, &mlxsw_emad_rx_listener, 588 mlxsw_core); 589 if (err) 590 return err; 591 592 err = mlxsw_core->driver->basic_trap_groups_set(mlxsw_core); 593 if (err) 594 goto err_emad_trap_set; 595 mlxsw_core->emad.use_emad = true; 596 597 return 0; 598 599 err_emad_trap_set: 600 mlxsw_core_trap_unregister(mlxsw_core, &mlxsw_emad_rx_listener, 601 mlxsw_core); 602 destroy_workqueue(mlxsw_core->emad_wq); 603 return err; 604 } 605 606 static void mlxsw_emad_fini(struct mlxsw_core *mlxsw_core) 607 { 608 609 if (!(mlxsw_core->bus->features & MLXSW_BUS_F_TXRX)) 610 return; 611 612 mlxsw_core->emad.use_emad = false; 613 mlxsw_core_trap_unregister(mlxsw_core, &mlxsw_emad_rx_listener, 614 mlxsw_core); 615 destroy_workqueue(mlxsw_core->emad_wq); 616 } 617 618 static struct sk_buff *mlxsw_emad_alloc(const struct mlxsw_core *mlxsw_core, 619 u16 reg_len) 620 { 621 struct sk_buff *skb; 622 u16 emad_len; 623 624 emad_len = (reg_len + sizeof(u32) + MLXSW_EMAD_ETH_HDR_LEN + 625 (MLXSW_EMAD_OP_TLV_LEN + MLXSW_EMAD_END_TLV_LEN) * 626 sizeof(u32) + mlxsw_core->driver->txhdr_len); 627 if (emad_len > MLXSW_EMAD_MAX_FRAME_LEN) 628 return NULL; 629 630 skb = netdev_alloc_skb(NULL, emad_len); 631 if (!skb) 632 return NULL; 633 memset(skb->data, 0, emad_len); 634 skb_reserve(skb, emad_len); 635 636 return skb; 637 } 638 639 static int mlxsw_emad_reg_access(struct mlxsw_core *mlxsw_core, 640 const struct mlxsw_reg_info *reg, 641 char *payload, 642 enum mlxsw_core_reg_access_type type, 643 struct mlxsw_reg_trans *trans, 644 struct list_head *bulk_list, 645 mlxsw_reg_trans_cb_t *cb, 646 unsigned long cb_priv, u64 tid) 647 { 648 struct sk_buff *skb; 649 int err; 650 651 dev_dbg(mlxsw_core->bus_info->dev, "EMAD reg access (tid=%llx,reg_id=%x(%s),type=%s)\n", 652 tid, reg->id, mlxsw_reg_id_str(reg->id), 653 mlxsw_core_reg_access_type_str(type)); 654 655 skb = mlxsw_emad_alloc(mlxsw_core, reg->len); 656 if (!skb) 657 return -ENOMEM; 658 659 list_add_tail(&trans->bulk_list, bulk_list); 660 trans->core = mlxsw_core; 661 trans->tx_skb = skb; 662 trans->tx_info.local_port = MLXSW_PORT_CPU_PORT; 663 trans->tx_info.is_emad = true; 664 INIT_DELAYED_WORK(&trans->timeout_dw, mlxsw_emad_trans_timeout_work); 665 trans->tid = tid; 666 init_completion(&trans->completion); 667 trans->cb = cb; 668 trans->cb_priv = cb_priv; 669 trans->reg = reg; 670 trans->type = type; 671 672 mlxsw_emad_construct(skb, reg, payload, type, trans->tid); 673 mlxsw_core->driver->txhdr_construct(skb, &trans->tx_info); 674 675 spin_lock_bh(&mlxsw_core->emad.trans_list_lock); 676 list_add_tail_rcu(&trans->list, &mlxsw_core->emad.trans_list); 677 spin_unlock_bh(&mlxsw_core->emad.trans_list_lock); 678 err = mlxsw_emad_transmit(mlxsw_core, trans); 679 if (err) 680 goto err_out; 681 return 0; 682 683 err_out: 684 spin_lock_bh(&mlxsw_core->emad.trans_list_lock); 685 list_del_rcu(&trans->list); 686 spin_unlock_bh(&mlxsw_core->emad.trans_list_lock); 687 list_del(&trans->bulk_list); 688 dev_kfree_skb(trans->tx_skb); 689 return err; 690 } 691 692 /***************** 693 * Core functions 694 *****************/ 695 696 int mlxsw_core_driver_register(struct mlxsw_driver *mlxsw_driver) 697 { 698 spin_lock(&mlxsw_core_driver_list_lock); 699 list_add_tail(&mlxsw_driver->list, &mlxsw_core_driver_list); 700 spin_unlock(&mlxsw_core_driver_list_lock); 701 return 0; 702 } 703 EXPORT_SYMBOL(mlxsw_core_driver_register); 704 705 void mlxsw_core_driver_unregister(struct mlxsw_driver *mlxsw_driver) 706 { 707 spin_lock(&mlxsw_core_driver_list_lock); 708 list_del(&mlxsw_driver->list); 709 spin_unlock(&mlxsw_core_driver_list_lock); 710 } 711 EXPORT_SYMBOL(mlxsw_core_driver_unregister); 712 713 static struct mlxsw_driver *__driver_find(const char *kind) 714 { 715 struct mlxsw_driver *mlxsw_driver; 716 717 list_for_each_entry(mlxsw_driver, &mlxsw_core_driver_list, list) { 718 if (strcmp(mlxsw_driver->kind, kind) == 0) 719 return mlxsw_driver; 720 } 721 return NULL; 722 } 723 724 static struct mlxsw_driver *mlxsw_core_driver_get(const char *kind) 725 { 726 struct mlxsw_driver *mlxsw_driver; 727 728 spin_lock(&mlxsw_core_driver_list_lock); 729 mlxsw_driver = __driver_find(kind); 730 spin_unlock(&mlxsw_core_driver_list_lock); 731 return mlxsw_driver; 732 } 733 734 static int mlxsw_devlink_port_split(struct devlink *devlink, 735 unsigned int port_index, 736 unsigned int count, 737 struct netlink_ext_ack *extack) 738 { 739 struct mlxsw_core *mlxsw_core = devlink_priv(devlink); 740 741 if (port_index >= mlxsw_core->max_ports) { 742 NL_SET_ERR_MSG_MOD(extack, "Port index exceeds maximum number of ports"); 743 return -EINVAL; 744 } 745 if (!mlxsw_core->driver->port_split) 746 return -EOPNOTSUPP; 747 return mlxsw_core->driver->port_split(mlxsw_core, port_index, count, 748 extack); 749 } 750 751 static int mlxsw_devlink_port_unsplit(struct devlink *devlink, 752 unsigned int port_index, 753 struct netlink_ext_ack *extack) 754 { 755 struct mlxsw_core *mlxsw_core = devlink_priv(devlink); 756 757 if (port_index >= mlxsw_core->max_ports) { 758 NL_SET_ERR_MSG_MOD(extack, "Port index exceeds maximum number of ports"); 759 return -EINVAL; 760 } 761 if (!mlxsw_core->driver->port_unsplit) 762 return -EOPNOTSUPP; 763 return mlxsw_core->driver->port_unsplit(mlxsw_core, port_index, 764 extack); 765 } 766 767 static int 768 mlxsw_devlink_sb_pool_get(struct devlink *devlink, 769 unsigned int sb_index, u16 pool_index, 770 struct devlink_sb_pool_info *pool_info) 771 { 772 struct mlxsw_core *mlxsw_core = devlink_priv(devlink); 773 struct mlxsw_driver *mlxsw_driver = mlxsw_core->driver; 774 775 if (!mlxsw_driver->sb_pool_get) 776 return -EOPNOTSUPP; 777 return mlxsw_driver->sb_pool_get(mlxsw_core, sb_index, 778 pool_index, pool_info); 779 } 780 781 static int 782 mlxsw_devlink_sb_pool_set(struct devlink *devlink, 783 unsigned int sb_index, u16 pool_index, u32 size, 784 enum devlink_sb_threshold_type threshold_type) 785 { 786 struct mlxsw_core *mlxsw_core = devlink_priv(devlink); 787 struct mlxsw_driver *mlxsw_driver = mlxsw_core->driver; 788 789 if (!mlxsw_driver->sb_pool_set) 790 return -EOPNOTSUPP; 791 return mlxsw_driver->sb_pool_set(mlxsw_core, sb_index, 792 pool_index, size, threshold_type); 793 } 794 795 static void *__dl_port(struct devlink_port *devlink_port) 796 { 797 return container_of(devlink_port, struct mlxsw_core_port, devlink_port); 798 } 799 800 static int mlxsw_devlink_port_type_set(struct devlink_port *devlink_port, 801 enum devlink_port_type port_type) 802 { 803 struct mlxsw_core *mlxsw_core = devlink_priv(devlink_port->devlink); 804 struct mlxsw_driver *mlxsw_driver = mlxsw_core->driver; 805 struct mlxsw_core_port *mlxsw_core_port = __dl_port(devlink_port); 806 807 if (!mlxsw_driver->port_type_set) 808 return -EOPNOTSUPP; 809 810 return mlxsw_driver->port_type_set(mlxsw_core, 811 mlxsw_core_port->local_port, 812 port_type); 813 } 814 815 static int mlxsw_devlink_sb_port_pool_get(struct devlink_port *devlink_port, 816 unsigned int sb_index, u16 pool_index, 817 u32 *p_threshold) 818 { 819 struct mlxsw_core *mlxsw_core = devlink_priv(devlink_port->devlink); 820 struct mlxsw_driver *mlxsw_driver = mlxsw_core->driver; 821 struct mlxsw_core_port *mlxsw_core_port = __dl_port(devlink_port); 822 823 if (!mlxsw_driver->sb_port_pool_get || 824 !mlxsw_core_port_check(mlxsw_core_port)) 825 return -EOPNOTSUPP; 826 return mlxsw_driver->sb_port_pool_get(mlxsw_core_port, sb_index, 827 pool_index, p_threshold); 828 } 829 830 static int mlxsw_devlink_sb_port_pool_set(struct devlink_port *devlink_port, 831 unsigned int sb_index, u16 pool_index, 832 u32 threshold) 833 { 834 struct mlxsw_core *mlxsw_core = devlink_priv(devlink_port->devlink); 835 struct mlxsw_driver *mlxsw_driver = mlxsw_core->driver; 836 struct mlxsw_core_port *mlxsw_core_port = __dl_port(devlink_port); 837 838 if (!mlxsw_driver->sb_port_pool_set || 839 !mlxsw_core_port_check(mlxsw_core_port)) 840 return -EOPNOTSUPP; 841 return mlxsw_driver->sb_port_pool_set(mlxsw_core_port, sb_index, 842 pool_index, threshold); 843 } 844 845 static int 846 mlxsw_devlink_sb_tc_pool_bind_get(struct devlink_port *devlink_port, 847 unsigned int sb_index, u16 tc_index, 848 enum devlink_sb_pool_type pool_type, 849 u16 *p_pool_index, u32 *p_threshold) 850 { 851 struct mlxsw_core *mlxsw_core = devlink_priv(devlink_port->devlink); 852 struct mlxsw_driver *mlxsw_driver = mlxsw_core->driver; 853 struct mlxsw_core_port *mlxsw_core_port = __dl_port(devlink_port); 854 855 if (!mlxsw_driver->sb_tc_pool_bind_get || 856 !mlxsw_core_port_check(mlxsw_core_port)) 857 return -EOPNOTSUPP; 858 return mlxsw_driver->sb_tc_pool_bind_get(mlxsw_core_port, sb_index, 859 tc_index, pool_type, 860 p_pool_index, p_threshold); 861 } 862 863 static int 864 mlxsw_devlink_sb_tc_pool_bind_set(struct devlink_port *devlink_port, 865 unsigned int sb_index, u16 tc_index, 866 enum devlink_sb_pool_type pool_type, 867 u16 pool_index, u32 threshold) 868 { 869 struct mlxsw_core *mlxsw_core = devlink_priv(devlink_port->devlink); 870 struct mlxsw_driver *mlxsw_driver = mlxsw_core->driver; 871 struct mlxsw_core_port *mlxsw_core_port = __dl_port(devlink_port); 872 873 if (!mlxsw_driver->sb_tc_pool_bind_set || 874 !mlxsw_core_port_check(mlxsw_core_port)) 875 return -EOPNOTSUPP; 876 return mlxsw_driver->sb_tc_pool_bind_set(mlxsw_core_port, sb_index, 877 tc_index, pool_type, 878 pool_index, threshold); 879 } 880 881 static int mlxsw_devlink_sb_occ_snapshot(struct devlink *devlink, 882 unsigned int sb_index) 883 { 884 struct mlxsw_core *mlxsw_core = devlink_priv(devlink); 885 struct mlxsw_driver *mlxsw_driver = mlxsw_core->driver; 886 887 if (!mlxsw_driver->sb_occ_snapshot) 888 return -EOPNOTSUPP; 889 return mlxsw_driver->sb_occ_snapshot(mlxsw_core, sb_index); 890 } 891 892 static int mlxsw_devlink_sb_occ_max_clear(struct devlink *devlink, 893 unsigned int sb_index) 894 { 895 struct mlxsw_core *mlxsw_core = devlink_priv(devlink); 896 struct mlxsw_driver *mlxsw_driver = mlxsw_core->driver; 897 898 if (!mlxsw_driver->sb_occ_max_clear) 899 return -EOPNOTSUPP; 900 return mlxsw_driver->sb_occ_max_clear(mlxsw_core, sb_index); 901 } 902 903 static int 904 mlxsw_devlink_sb_occ_port_pool_get(struct devlink_port *devlink_port, 905 unsigned int sb_index, u16 pool_index, 906 u32 *p_cur, u32 *p_max) 907 { 908 struct mlxsw_core *mlxsw_core = devlink_priv(devlink_port->devlink); 909 struct mlxsw_driver *mlxsw_driver = mlxsw_core->driver; 910 struct mlxsw_core_port *mlxsw_core_port = __dl_port(devlink_port); 911 912 if (!mlxsw_driver->sb_occ_port_pool_get || 913 !mlxsw_core_port_check(mlxsw_core_port)) 914 return -EOPNOTSUPP; 915 return mlxsw_driver->sb_occ_port_pool_get(mlxsw_core_port, sb_index, 916 pool_index, p_cur, p_max); 917 } 918 919 static int 920 mlxsw_devlink_sb_occ_tc_port_bind_get(struct devlink_port *devlink_port, 921 unsigned int sb_index, u16 tc_index, 922 enum devlink_sb_pool_type pool_type, 923 u32 *p_cur, u32 *p_max) 924 { 925 struct mlxsw_core *mlxsw_core = devlink_priv(devlink_port->devlink); 926 struct mlxsw_driver *mlxsw_driver = mlxsw_core->driver; 927 struct mlxsw_core_port *mlxsw_core_port = __dl_port(devlink_port); 928 929 if (!mlxsw_driver->sb_occ_tc_port_bind_get || 930 !mlxsw_core_port_check(mlxsw_core_port)) 931 return -EOPNOTSUPP; 932 return mlxsw_driver->sb_occ_tc_port_bind_get(mlxsw_core_port, 933 sb_index, tc_index, 934 pool_type, p_cur, p_max); 935 } 936 937 static int mlxsw_devlink_core_bus_device_reload(struct devlink *devlink, 938 struct netlink_ext_ack *extack) 939 { 940 struct mlxsw_core *mlxsw_core = devlink_priv(devlink); 941 int err; 942 943 if (!(mlxsw_core->bus->features & MLXSW_BUS_F_RESET)) 944 return -EOPNOTSUPP; 945 946 mlxsw_core_bus_device_unregister(mlxsw_core, true); 947 err = mlxsw_core_bus_device_register(mlxsw_core->bus_info, 948 mlxsw_core->bus, 949 mlxsw_core->bus_priv, true, 950 devlink); 951 mlxsw_core->reload_fail = !!err; 952 953 return err; 954 } 955 956 static const struct devlink_ops mlxsw_devlink_ops = { 957 .reload = mlxsw_devlink_core_bus_device_reload, 958 .port_type_set = mlxsw_devlink_port_type_set, 959 .port_split = mlxsw_devlink_port_split, 960 .port_unsplit = mlxsw_devlink_port_unsplit, 961 .sb_pool_get = mlxsw_devlink_sb_pool_get, 962 .sb_pool_set = mlxsw_devlink_sb_pool_set, 963 .sb_port_pool_get = mlxsw_devlink_sb_port_pool_get, 964 .sb_port_pool_set = mlxsw_devlink_sb_port_pool_set, 965 .sb_tc_pool_bind_get = mlxsw_devlink_sb_tc_pool_bind_get, 966 .sb_tc_pool_bind_set = mlxsw_devlink_sb_tc_pool_bind_set, 967 .sb_occ_snapshot = mlxsw_devlink_sb_occ_snapshot, 968 .sb_occ_max_clear = mlxsw_devlink_sb_occ_max_clear, 969 .sb_occ_port_pool_get = mlxsw_devlink_sb_occ_port_pool_get, 970 .sb_occ_tc_port_bind_get = mlxsw_devlink_sb_occ_tc_port_bind_get, 971 }; 972 973 static int 974 __mlxsw_core_bus_device_register(const struct mlxsw_bus_info *mlxsw_bus_info, 975 const struct mlxsw_bus *mlxsw_bus, 976 void *bus_priv, bool reload, 977 struct devlink *devlink) 978 { 979 const char *device_kind = mlxsw_bus_info->device_kind; 980 struct mlxsw_core *mlxsw_core; 981 struct mlxsw_driver *mlxsw_driver; 982 struct mlxsw_res *res; 983 size_t alloc_size; 984 int err; 985 986 mlxsw_driver = mlxsw_core_driver_get(device_kind); 987 if (!mlxsw_driver) 988 return -EINVAL; 989 990 if (!reload) { 991 alloc_size = sizeof(*mlxsw_core) + mlxsw_driver->priv_size; 992 devlink = devlink_alloc(&mlxsw_devlink_ops, alloc_size); 993 if (!devlink) { 994 err = -ENOMEM; 995 goto err_devlink_alloc; 996 } 997 } 998 999 mlxsw_core = devlink_priv(devlink); 1000 INIT_LIST_HEAD(&mlxsw_core->rx_listener_list); 1001 INIT_LIST_HEAD(&mlxsw_core->event_listener_list); 1002 mlxsw_core->driver = mlxsw_driver; 1003 mlxsw_core->bus = mlxsw_bus; 1004 mlxsw_core->bus_priv = bus_priv; 1005 mlxsw_core->bus_info = mlxsw_bus_info; 1006 1007 res = mlxsw_driver->res_query_enabled ? &mlxsw_core->res : NULL; 1008 err = mlxsw_bus->init(bus_priv, mlxsw_core, mlxsw_driver->profile, res); 1009 if (err) 1010 goto err_bus_init; 1011 1012 if (mlxsw_driver->resources_register && !reload) { 1013 err = mlxsw_driver->resources_register(mlxsw_core); 1014 if (err) 1015 goto err_register_resources; 1016 } 1017 1018 err = mlxsw_ports_init(mlxsw_core); 1019 if (err) 1020 goto err_ports_init; 1021 1022 if (MLXSW_CORE_RES_VALID(mlxsw_core, MAX_LAG) && 1023 MLXSW_CORE_RES_VALID(mlxsw_core, MAX_LAG_MEMBERS)) { 1024 alloc_size = sizeof(u8) * 1025 MLXSW_CORE_RES_GET(mlxsw_core, MAX_LAG) * 1026 MLXSW_CORE_RES_GET(mlxsw_core, MAX_LAG_MEMBERS); 1027 mlxsw_core->lag.mapping = kzalloc(alloc_size, GFP_KERNEL); 1028 if (!mlxsw_core->lag.mapping) { 1029 err = -ENOMEM; 1030 goto err_alloc_lag_mapping; 1031 } 1032 } 1033 1034 err = mlxsw_emad_init(mlxsw_core); 1035 if (err) 1036 goto err_emad_init; 1037 1038 if (!reload) { 1039 err = devlink_register(devlink, mlxsw_bus_info->dev); 1040 if (err) 1041 goto err_devlink_register; 1042 } 1043 1044 if (mlxsw_driver->params_register && !reload) { 1045 err = mlxsw_driver->params_register(mlxsw_core); 1046 if (err) 1047 goto err_register_params; 1048 } 1049 1050 err = mlxsw_hwmon_init(mlxsw_core, mlxsw_bus_info, &mlxsw_core->hwmon); 1051 if (err) 1052 goto err_hwmon_init; 1053 1054 err = mlxsw_thermal_init(mlxsw_core, mlxsw_bus_info, 1055 &mlxsw_core->thermal); 1056 if (err) 1057 goto err_thermal_init; 1058 1059 if (mlxsw_driver->init) { 1060 err = mlxsw_driver->init(mlxsw_core, mlxsw_bus_info); 1061 if (err) 1062 goto err_driver_init; 1063 } 1064 1065 if (mlxsw_driver->params_register && !reload) 1066 devlink_params_publish(devlink); 1067 1068 return 0; 1069 1070 err_driver_init: 1071 mlxsw_thermal_fini(mlxsw_core->thermal); 1072 err_thermal_init: 1073 mlxsw_hwmon_fini(mlxsw_core->hwmon); 1074 err_hwmon_init: 1075 if (mlxsw_driver->params_unregister && !reload) 1076 mlxsw_driver->params_unregister(mlxsw_core); 1077 err_register_params: 1078 if (!reload) 1079 devlink_unregister(devlink); 1080 err_devlink_register: 1081 mlxsw_emad_fini(mlxsw_core); 1082 err_emad_init: 1083 kfree(mlxsw_core->lag.mapping); 1084 err_alloc_lag_mapping: 1085 mlxsw_ports_fini(mlxsw_core); 1086 err_ports_init: 1087 if (!reload) 1088 devlink_resources_unregister(devlink, NULL); 1089 err_register_resources: 1090 mlxsw_bus->fini(bus_priv); 1091 err_bus_init: 1092 if (!reload) 1093 devlink_free(devlink); 1094 err_devlink_alloc: 1095 return err; 1096 } 1097 1098 int mlxsw_core_bus_device_register(const struct mlxsw_bus_info *mlxsw_bus_info, 1099 const struct mlxsw_bus *mlxsw_bus, 1100 void *bus_priv, bool reload, 1101 struct devlink *devlink) 1102 { 1103 bool called_again = false; 1104 int err; 1105 1106 again: 1107 err = __mlxsw_core_bus_device_register(mlxsw_bus_info, mlxsw_bus, 1108 bus_priv, reload, devlink); 1109 /* -EAGAIN is returned in case the FW was updated. FW needs 1110 * a reset, so lets try to call __mlxsw_core_bus_device_register() 1111 * again. 1112 */ 1113 if (err == -EAGAIN && !called_again) { 1114 called_again = true; 1115 goto again; 1116 } 1117 1118 return err; 1119 } 1120 EXPORT_SYMBOL(mlxsw_core_bus_device_register); 1121 1122 void mlxsw_core_bus_device_unregister(struct mlxsw_core *mlxsw_core, 1123 bool reload) 1124 { 1125 struct devlink *devlink = priv_to_devlink(mlxsw_core); 1126 1127 if (mlxsw_core->reload_fail) { 1128 if (!reload) 1129 /* Only the parts that were not de-initialized in the 1130 * failed reload attempt need to be de-initialized. 1131 */ 1132 goto reload_fail_deinit; 1133 else 1134 return; 1135 } 1136 1137 if (mlxsw_core->driver->params_unregister && !reload) 1138 devlink_params_unpublish(devlink); 1139 if (mlxsw_core->driver->fini) 1140 mlxsw_core->driver->fini(mlxsw_core); 1141 mlxsw_thermal_fini(mlxsw_core->thermal); 1142 mlxsw_hwmon_fini(mlxsw_core->hwmon); 1143 if (mlxsw_core->driver->params_unregister && !reload) 1144 mlxsw_core->driver->params_unregister(mlxsw_core); 1145 if (!reload) 1146 devlink_unregister(devlink); 1147 mlxsw_emad_fini(mlxsw_core); 1148 kfree(mlxsw_core->lag.mapping); 1149 mlxsw_ports_fini(mlxsw_core); 1150 if (!reload) 1151 devlink_resources_unregister(devlink, NULL); 1152 mlxsw_core->bus->fini(mlxsw_core->bus_priv); 1153 1154 return; 1155 1156 reload_fail_deinit: 1157 if (mlxsw_core->driver->params_unregister) 1158 mlxsw_core->driver->params_unregister(mlxsw_core); 1159 devlink_unregister(devlink); 1160 devlink_resources_unregister(devlink, NULL); 1161 devlink_free(devlink); 1162 } 1163 EXPORT_SYMBOL(mlxsw_core_bus_device_unregister); 1164 1165 bool mlxsw_core_skb_transmit_busy(struct mlxsw_core *mlxsw_core, 1166 const struct mlxsw_tx_info *tx_info) 1167 { 1168 return mlxsw_core->bus->skb_transmit_busy(mlxsw_core->bus_priv, 1169 tx_info); 1170 } 1171 EXPORT_SYMBOL(mlxsw_core_skb_transmit_busy); 1172 1173 int mlxsw_core_skb_transmit(struct mlxsw_core *mlxsw_core, struct sk_buff *skb, 1174 const struct mlxsw_tx_info *tx_info) 1175 { 1176 return mlxsw_core->bus->skb_transmit(mlxsw_core->bus_priv, skb, 1177 tx_info); 1178 } 1179 EXPORT_SYMBOL(mlxsw_core_skb_transmit); 1180 1181 static bool __is_rx_listener_equal(const struct mlxsw_rx_listener *rxl_a, 1182 const struct mlxsw_rx_listener *rxl_b) 1183 { 1184 return (rxl_a->func == rxl_b->func && 1185 rxl_a->local_port == rxl_b->local_port && 1186 rxl_a->trap_id == rxl_b->trap_id); 1187 } 1188 1189 static struct mlxsw_rx_listener_item * 1190 __find_rx_listener_item(struct mlxsw_core *mlxsw_core, 1191 const struct mlxsw_rx_listener *rxl, 1192 void *priv) 1193 { 1194 struct mlxsw_rx_listener_item *rxl_item; 1195 1196 list_for_each_entry(rxl_item, &mlxsw_core->rx_listener_list, list) { 1197 if (__is_rx_listener_equal(&rxl_item->rxl, rxl) && 1198 rxl_item->priv == priv) 1199 return rxl_item; 1200 } 1201 return NULL; 1202 } 1203 1204 int mlxsw_core_rx_listener_register(struct mlxsw_core *mlxsw_core, 1205 const struct mlxsw_rx_listener *rxl, 1206 void *priv) 1207 { 1208 struct mlxsw_rx_listener_item *rxl_item; 1209 1210 rxl_item = __find_rx_listener_item(mlxsw_core, rxl, priv); 1211 if (rxl_item) 1212 return -EEXIST; 1213 rxl_item = kmalloc(sizeof(*rxl_item), GFP_KERNEL); 1214 if (!rxl_item) 1215 return -ENOMEM; 1216 rxl_item->rxl = *rxl; 1217 rxl_item->priv = priv; 1218 1219 list_add_rcu(&rxl_item->list, &mlxsw_core->rx_listener_list); 1220 return 0; 1221 } 1222 EXPORT_SYMBOL(mlxsw_core_rx_listener_register); 1223 1224 void mlxsw_core_rx_listener_unregister(struct mlxsw_core *mlxsw_core, 1225 const struct mlxsw_rx_listener *rxl, 1226 void *priv) 1227 { 1228 struct mlxsw_rx_listener_item *rxl_item; 1229 1230 rxl_item = __find_rx_listener_item(mlxsw_core, rxl, priv); 1231 if (!rxl_item) 1232 return; 1233 list_del_rcu(&rxl_item->list); 1234 synchronize_rcu(); 1235 kfree(rxl_item); 1236 } 1237 EXPORT_SYMBOL(mlxsw_core_rx_listener_unregister); 1238 1239 static void mlxsw_core_event_listener_func(struct sk_buff *skb, u8 local_port, 1240 void *priv) 1241 { 1242 struct mlxsw_event_listener_item *event_listener_item = priv; 1243 struct mlxsw_reg_info reg; 1244 char *payload; 1245 char *op_tlv = mlxsw_emad_op_tlv(skb); 1246 char *reg_tlv = mlxsw_emad_reg_tlv(skb); 1247 1248 reg.id = mlxsw_emad_op_tlv_register_id_get(op_tlv); 1249 reg.len = (mlxsw_emad_reg_tlv_len_get(reg_tlv) - 1) * sizeof(u32); 1250 payload = mlxsw_emad_reg_payload(op_tlv); 1251 event_listener_item->el.func(®, payload, event_listener_item->priv); 1252 dev_kfree_skb(skb); 1253 } 1254 1255 static bool __is_event_listener_equal(const struct mlxsw_event_listener *el_a, 1256 const struct mlxsw_event_listener *el_b) 1257 { 1258 return (el_a->func == el_b->func && 1259 el_a->trap_id == el_b->trap_id); 1260 } 1261 1262 static struct mlxsw_event_listener_item * 1263 __find_event_listener_item(struct mlxsw_core *mlxsw_core, 1264 const struct mlxsw_event_listener *el, 1265 void *priv) 1266 { 1267 struct mlxsw_event_listener_item *el_item; 1268 1269 list_for_each_entry(el_item, &mlxsw_core->event_listener_list, list) { 1270 if (__is_event_listener_equal(&el_item->el, el) && 1271 el_item->priv == priv) 1272 return el_item; 1273 } 1274 return NULL; 1275 } 1276 1277 int mlxsw_core_event_listener_register(struct mlxsw_core *mlxsw_core, 1278 const struct mlxsw_event_listener *el, 1279 void *priv) 1280 { 1281 int err; 1282 struct mlxsw_event_listener_item *el_item; 1283 const struct mlxsw_rx_listener rxl = { 1284 .func = mlxsw_core_event_listener_func, 1285 .local_port = MLXSW_PORT_DONT_CARE, 1286 .trap_id = el->trap_id, 1287 }; 1288 1289 el_item = __find_event_listener_item(mlxsw_core, el, priv); 1290 if (el_item) 1291 return -EEXIST; 1292 el_item = kmalloc(sizeof(*el_item), GFP_KERNEL); 1293 if (!el_item) 1294 return -ENOMEM; 1295 el_item->el = *el; 1296 el_item->priv = priv; 1297 1298 err = mlxsw_core_rx_listener_register(mlxsw_core, &rxl, el_item); 1299 if (err) 1300 goto err_rx_listener_register; 1301 1302 /* No reason to save item if we did not manage to register an RX 1303 * listener for it. 1304 */ 1305 list_add_rcu(&el_item->list, &mlxsw_core->event_listener_list); 1306 1307 return 0; 1308 1309 err_rx_listener_register: 1310 kfree(el_item); 1311 return err; 1312 } 1313 EXPORT_SYMBOL(mlxsw_core_event_listener_register); 1314 1315 void mlxsw_core_event_listener_unregister(struct mlxsw_core *mlxsw_core, 1316 const struct mlxsw_event_listener *el, 1317 void *priv) 1318 { 1319 struct mlxsw_event_listener_item *el_item; 1320 const struct mlxsw_rx_listener rxl = { 1321 .func = mlxsw_core_event_listener_func, 1322 .local_port = MLXSW_PORT_DONT_CARE, 1323 .trap_id = el->trap_id, 1324 }; 1325 1326 el_item = __find_event_listener_item(mlxsw_core, el, priv); 1327 if (!el_item) 1328 return; 1329 mlxsw_core_rx_listener_unregister(mlxsw_core, &rxl, el_item); 1330 list_del(&el_item->list); 1331 kfree(el_item); 1332 } 1333 EXPORT_SYMBOL(mlxsw_core_event_listener_unregister); 1334 1335 static int mlxsw_core_listener_register(struct mlxsw_core *mlxsw_core, 1336 const struct mlxsw_listener *listener, 1337 void *priv) 1338 { 1339 if (listener->is_event) 1340 return mlxsw_core_event_listener_register(mlxsw_core, 1341 &listener->u.event_listener, 1342 priv); 1343 else 1344 return mlxsw_core_rx_listener_register(mlxsw_core, 1345 &listener->u.rx_listener, 1346 priv); 1347 } 1348 1349 static void mlxsw_core_listener_unregister(struct mlxsw_core *mlxsw_core, 1350 const struct mlxsw_listener *listener, 1351 void *priv) 1352 { 1353 if (listener->is_event) 1354 mlxsw_core_event_listener_unregister(mlxsw_core, 1355 &listener->u.event_listener, 1356 priv); 1357 else 1358 mlxsw_core_rx_listener_unregister(mlxsw_core, 1359 &listener->u.rx_listener, 1360 priv); 1361 } 1362 1363 int mlxsw_core_trap_register(struct mlxsw_core *mlxsw_core, 1364 const struct mlxsw_listener *listener, void *priv) 1365 { 1366 char hpkt_pl[MLXSW_REG_HPKT_LEN]; 1367 int err; 1368 1369 err = mlxsw_core_listener_register(mlxsw_core, listener, priv); 1370 if (err) 1371 return err; 1372 1373 mlxsw_reg_hpkt_pack(hpkt_pl, listener->action, listener->trap_id, 1374 listener->trap_group, listener->is_ctrl); 1375 err = mlxsw_reg_write(mlxsw_core, MLXSW_REG(hpkt), hpkt_pl); 1376 if (err) 1377 goto err_trap_set; 1378 1379 return 0; 1380 1381 err_trap_set: 1382 mlxsw_core_listener_unregister(mlxsw_core, listener, priv); 1383 return err; 1384 } 1385 EXPORT_SYMBOL(mlxsw_core_trap_register); 1386 1387 void mlxsw_core_trap_unregister(struct mlxsw_core *mlxsw_core, 1388 const struct mlxsw_listener *listener, 1389 void *priv) 1390 { 1391 char hpkt_pl[MLXSW_REG_HPKT_LEN]; 1392 1393 if (!listener->is_event) { 1394 mlxsw_reg_hpkt_pack(hpkt_pl, listener->unreg_action, 1395 listener->trap_id, listener->trap_group, 1396 listener->is_ctrl); 1397 mlxsw_reg_write(mlxsw_core, MLXSW_REG(hpkt), hpkt_pl); 1398 } 1399 1400 mlxsw_core_listener_unregister(mlxsw_core, listener, priv); 1401 } 1402 EXPORT_SYMBOL(mlxsw_core_trap_unregister); 1403 1404 static u64 mlxsw_core_tid_get(struct mlxsw_core *mlxsw_core) 1405 { 1406 return atomic64_inc_return(&mlxsw_core->emad.tid); 1407 } 1408 1409 static int mlxsw_core_reg_access_emad(struct mlxsw_core *mlxsw_core, 1410 const struct mlxsw_reg_info *reg, 1411 char *payload, 1412 enum mlxsw_core_reg_access_type type, 1413 struct list_head *bulk_list, 1414 mlxsw_reg_trans_cb_t *cb, 1415 unsigned long cb_priv) 1416 { 1417 u64 tid = mlxsw_core_tid_get(mlxsw_core); 1418 struct mlxsw_reg_trans *trans; 1419 int err; 1420 1421 trans = kzalloc(sizeof(*trans), GFP_KERNEL); 1422 if (!trans) 1423 return -ENOMEM; 1424 1425 err = mlxsw_emad_reg_access(mlxsw_core, reg, payload, type, trans, 1426 bulk_list, cb, cb_priv, tid); 1427 if (err) { 1428 kfree(trans); 1429 return err; 1430 } 1431 return 0; 1432 } 1433 1434 int mlxsw_reg_trans_query(struct mlxsw_core *mlxsw_core, 1435 const struct mlxsw_reg_info *reg, char *payload, 1436 struct list_head *bulk_list, 1437 mlxsw_reg_trans_cb_t *cb, unsigned long cb_priv) 1438 { 1439 return mlxsw_core_reg_access_emad(mlxsw_core, reg, payload, 1440 MLXSW_CORE_REG_ACCESS_TYPE_QUERY, 1441 bulk_list, cb, cb_priv); 1442 } 1443 EXPORT_SYMBOL(mlxsw_reg_trans_query); 1444 1445 int mlxsw_reg_trans_write(struct mlxsw_core *mlxsw_core, 1446 const struct mlxsw_reg_info *reg, char *payload, 1447 struct list_head *bulk_list, 1448 mlxsw_reg_trans_cb_t *cb, unsigned long cb_priv) 1449 { 1450 return mlxsw_core_reg_access_emad(mlxsw_core, reg, payload, 1451 MLXSW_CORE_REG_ACCESS_TYPE_WRITE, 1452 bulk_list, cb, cb_priv); 1453 } 1454 EXPORT_SYMBOL(mlxsw_reg_trans_write); 1455 1456 static int mlxsw_reg_trans_wait(struct mlxsw_reg_trans *trans) 1457 { 1458 struct mlxsw_core *mlxsw_core = trans->core; 1459 int err; 1460 1461 wait_for_completion(&trans->completion); 1462 cancel_delayed_work_sync(&trans->timeout_dw); 1463 err = trans->err; 1464 1465 if (trans->retries) 1466 dev_warn(mlxsw_core->bus_info->dev, "EMAD retries (%d/%d) (tid=%llx)\n", 1467 trans->retries, MLXSW_EMAD_MAX_RETRY, trans->tid); 1468 if (err) { 1469 dev_err(mlxsw_core->bus_info->dev, "EMAD reg access failed (tid=%llx,reg_id=%x(%s),type=%s,status=%x(%s))\n", 1470 trans->tid, trans->reg->id, 1471 mlxsw_reg_id_str(trans->reg->id), 1472 mlxsw_core_reg_access_type_str(trans->type), 1473 trans->emad_status, 1474 mlxsw_emad_op_tlv_status_str(trans->emad_status)); 1475 trace_devlink_hwerr(priv_to_devlink(mlxsw_core), 1476 trans->emad_status, 1477 mlxsw_emad_op_tlv_status_str(trans->emad_status)); 1478 } 1479 1480 list_del(&trans->bulk_list); 1481 kfree_rcu(trans, rcu); 1482 return err; 1483 } 1484 1485 int mlxsw_reg_trans_bulk_wait(struct list_head *bulk_list) 1486 { 1487 struct mlxsw_reg_trans *trans; 1488 struct mlxsw_reg_trans *tmp; 1489 int sum_err = 0; 1490 int err; 1491 1492 list_for_each_entry_safe(trans, tmp, bulk_list, bulk_list) { 1493 err = mlxsw_reg_trans_wait(trans); 1494 if (err && sum_err == 0) 1495 sum_err = err; /* first error to be returned */ 1496 } 1497 return sum_err; 1498 } 1499 EXPORT_SYMBOL(mlxsw_reg_trans_bulk_wait); 1500 1501 static int mlxsw_core_reg_access_cmd(struct mlxsw_core *mlxsw_core, 1502 const struct mlxsw_reg_info *reg, 1503 char *payload, 1504 enum mlxsw_core_reg_access_type type) 1505 { 1506 enum mlxsw_emad_op_tlv_status status; 1507 int err, n_retry; 1508 bool reset_ok; 1509 char *in_mbox, *out_mbox, *tmp; 1510 1511 dev_dbg(mlxsw_core->bus_info->dev, "Reg cmd access (reg_id=%x(%s),type=%s)\n", 1512 reg->id, mlxsw_reg_id_str(reg->id), 1513 mlxsw_core_reg_access_type_str(type)); 1514 1515 in_mbox = mlxsw_cmd_mbox_alloc(); 1516 if (!in_mbox) 1517 return -ENOMEM; 1518 1519 out_mbox = mlxsw_cmd_mbox_alloc(); 1520 if (!out_mbox) { 1521 err = -ENOMEM; 1522 goto free_in_mbox; 1523 } 1524 1525 mlxsw_emad_pack_op_tlv(in_mbox, reg, type, 1526 mlxsw_core_tid_get(mlxsw_core)); 1527 tmp = in_mbox + MLXSW_EMAD_OP_TLV_LEN * sizeof(u32); 1528 mlxsw_emad_pack_reg_tlv(tmp, reg, payload); 1529 1530 /* There is a special treatment needed for MRSR (reset) register. 1531 * The command interface will return error after the command 1532 * is executed, so tell the lower layer to expect it 1533 * and cope accordingly. 1534 */ 1535 reset_ok = reg->id == MLXSW_REG_MRSR_ID; 1536 1537 n_retry = 0; 1538 retry: 1539 err = mlxsw_cmd_access_reg(mlxsw_core, reset_ok, in_mbox, out_mbox); 1540 if (!err) { 1541 err = mlxsw_emad_process_status(out_mbox, &status); 1542 if (err) { 1543 if (err == -EAGAIN && n_retry++ < MLXSW_EMAD_MAX_RETRY) 1544 goto retry; 1545 dev_err(mlxsw_core->bus_info->dev, "Reg cmd access status failed (status=%x(%s))\n", 1546 status, mlxsw_emad_op_tlv_status_str(status)); 1547 } 1548 } 1549 1550 if (!err) 1551 memcpy(payload, mlxsw_emad_reg_payload(out_mbox), 1552 reg->len); 1553 1554 mlxsw_cmd_mbox_free(out_mbox); 1555 free_in_mbox: 1556 mlxsw_cmd_mbox_free(in_mbox); 1557 if (err) 1558 dev_err(mlxsw_core->bus_info->dev, "Reg cmd access failed (reg_id=%x(%s),type=%s)\n", 1559 reg->id, mlxsw_reg_id_str(reg->id), 1560 mlxsw_core_reg_access_type_str(type)); 1561 return err; 1562 } 1563 1564 static void mlxsw_core_reg_access_cb(struct mlxsw_core *mlxsw_core, 1565 char *payload, size_t payload_len, 1566 unsigned long cb_priv) 1567 { 1568 char *orig_payload = (char *) cb_priv; 1569 1570 memcpy(orig_payload, payload, payload_len); 1571 } 1572 1573 static int mlxsw_core_reg_access(struct mlxsw_core *mlxsw_core, 1574 const struct mlxsw_reg_info *reg, 1575 char *payload, 1576 enum mlxsw_core_reg_access_type type) 1577 { 1578 LIST_HEAD(bulk_list); 1579 int err; 1580 1581 /* During initialization EMAD interface is not available to us, 1582 * so we default to command interface. We switch to EMAD interface 1583 * after setting the appropriate traps. 1584 */ 1585 if (!mlxsw_core->emad.use_emad) 1586 return mlxsw_core_reg_access_cmd(mlxsw_core, reg, 1587 payload, type); 1588 1589 err = mlxsw_core_reg_access_emad(mlxsw_core, reg, 1590 payload, type, &bulk_list, 1591 mlxsw_core_reg_access_cb, 1592 (unsigned long) payload); 1593 if (err) 1594 return err; 1595 return mlxsw_reg_trans_bulk_wait(&bulk_list); 1596 } 1597 1598 int mlxsw_reg_query(struct mlxsw_core *mlxsw_core, 1599 const struct mlxsw_reg_info *reg, char *payload) 1600 { 1601 return mlxsw_core_reg_access(mlxsw_core, reg, payload, 1602 MLXSW_CORE_REG_ACCESS_TYPE_QUERY); 1603 } 1604 EXPORT_SYMBOL(mlxsw_reg_query); 1605 1606 int mlxsw_reg_write(struct mlxsw_core *mlxsw_core, 1607 const struct mlxsw_reg_info *reg, char *payload) 1608 { 1609 return mlxsw_core_reg_access(mlxsw_core, reg, payload, 1610 MLXSW_CORE_REG_ACCESS_TYPE_WRITE); 1611 } 1612 EXPORT_SYMBOL(mlxsw_reg_write); 1613 1614 void mlxsw_core_skb_receive(struct mlxsw_core *mlxsw_core, struct sk_buff *skb, 1615 struct mlxsw_rx_info *rx_info) 1616 { 1617 struct mlxsw_rx_listener_item *rxl_item; 1618 const struct mlxsw_rx_listener *rxl; 1619 u8 local_port; 1620 bool found = false; 1621 1622 if (rx_info->is_lag) { 1623 dev_dbg_ratelimited(mlxsw_core->bus_info->dev, "%s: lag_id = %d, lag_port_index = 0x%x\n", 1624 __func__, rx_info->u.lag_id, 1625 rx_info->trap_id); 1626 /* Upper layer does not care if the skb came from LAG or not, 1627 * so just get the local_port for the lag port and push it up. 1628 */ 1629 local_port = mlxsw_core_lag_mapping_get(mlxsw_core, 1630 rx_info->u.lag_id, 1631 rx_info->lag_port_index); 1632 } else { 1633 local_port = rx_info->u.sys_port; 1634 } 1635 1636 dev_dbg_ratelimited(mlxsw_core->bus_info->dev, "%s: local_port = %d, trap_id = 0x%x\n", 1637 __func__, local_port, rx_info->trap_id); 1638 1639 if ((rx_info->trap_id >= MLXSW_TRAP_ID_MAX) || 1640 (local_port >= mlxsw_core->max_ports)) 1641 goto drop; 1642 1643 rcu_read_lock(); 1644 list_for_each_entry_rcu(rxl_item, &mlxsw_core->rx_listener_list, list) { 1645 rxl = &rxl_item->rxl; 1646 if ((rxl->local_port == MLXSW_PORT_DONT_CARE || 1647 rxl->local_port == local_port) && 1648 rxl->trap_id == rx_info->trap_id) { 1649 found = true; 1650 break; 1651 } 1652 } 1653 rcu_read_unlock(); 1654 if (!found) 1655 goto drop; 1656 1657 rxl->func(skb, local_port, rxl_item->priv); 1658 return; 1659 1660 drop: 1661 dev_kfree_skb(skb); 1662 } 1663 EXPORT_SYMBOL(mlxsw_core_skb_receive); 1664 1665 static int mlxsw_core_lag_mapping_index(struct mlxsw_core *mlxsw_core, 1666 u16 lag_id, u8 port_index) 1667 { 1668 return MLXSW_CORE_RES_GET(mlxsw_core, MAX_LAG_MEMBERS) * lag_id + 1669 port_index; 1670 } 1671 1672 void mlxsw_core_lag_mapping_set(struct mlxsw_core *mlxsw_core, 1673 u16 lag_id, u8 port_index, u8 local_port) 1674 { 1675 int index = mlxsw_core_lag_mapping_index(mlxsw_core, 1676 lag_id, port_index); 1677 1678 mlxsw_core->lag.mapping[index] = local_port; 1679 } 1680 EXPORT_SYMBOL(mlxsw_core_lag_mapping_set); 1681 1682 u8 mlxsw_core_lag_mapping_get(struct mlxsw_core *mlxsw_core, 1683 u16 lag_id, u8 port_index) 1684 { 1685 int index = mlxsw_core_lag_mapping_index(mlxsw_core, 1686 lag_id, port_index); 1687 1688 return mlxsw_core->lag.mapping[index]; 1689 } 1690 EXPORT_SYMBOL(mlxsw_core_lag_mapping_get); 1691 1692 void mlxsw_core_lag_mapping_clear(struct mlxsw_core *mlxsw_core, 1693 u16 lag_id, u8 local_port) 1694 { 1695 int i; 1696 1697 for (i = 0; i < MLXSW_CORE_RES_GET(mlxsw_core, MAX_LAG_MEMBERS); i++) { 1698 int index = mlxsw_core_lag_mapping_index(mlxsw_core, 1699 lag_id, i); 1700 1701 if (mlxsw_core->lag.mapping[index] == local_port) 1702 mlxsw_core->lag.mapping[index] = 0; 1703 } 1704 } 1705 EXPORT_SYMBOL(mlxsw_core_lag_mapping_clear); 1706 1707 bool mlxsw_core_res_valid(struct mlxsw_core *mlxsw_core, 1708 enum mlxsw_res_id res_id) 1709 { 1710 return mlxsw_res_valid(&mlxsw_core->res, res_id); 1711 } 1712 EXPORT_SYMBOL(mlxsw_core_res_valid); 1713 1714 u64 mlxsw_core_res_get(struct mlxsw_core *mlxsw_core, 1715 enum mlxsw_res_id res_id) 1716 { 1717 return mlxsw_res_get(&mlxsw_core->res, res_id); 1718 } 1719 EXPORT_SYMBOL(mlxsw_core_res_get); 1720 1721 int mlxsw_core_port_init(struct mlxsw_core *mlxsw_core, u8 local_port) 1722 { 1723 struct devlink *devlink = priv_to_devlink(mlxsw_core); 1724 struct mlxsw_core_port *mlxsw_core_port = 1725 &mlxsw_core->ports[local_port]; 1726 struct devlink_port *devlink_port = &mlxsw_core_port->devlink_port; 1727 int err; 1728 1729 mlxsw_core_port->local_port = local_port; 1730 err = devlink_port_register(devlink, devlink_port, local_port); 1731 if (err) 1732 memset(mlxsw_core_port, 0, sizeof(*mlxsw_core_port)); 1733 return err; 1734 } 1735 EXPORT_SYMBOL(mlxsw_core_port_init); 1736 1737 void mlxsw_core_port_fini(struct mlxsw_core *mlxsw_core, u8 local_port) 1738 { 1739 struct mlxsw_core_port *mlxsw_core_port = 1740 &mlxsw_core->ports[local_port]; 1741 struct devlink_port *devlink_port = &mlxsw_core_port->devlink_port; 1742 1743 devlink_port_unregister(devlink_port); 1744 memset(mlxsw_core_port, 0, sizeof(*mlxsw_core_port)); 1745 } 1746 EXPORT_SYMBOL(mlxsw_core_port_fini); 1747 1748 void mlxsw_core_port_eth_set(struct mlxsw_core *mlxsw_core, u8 local_port, 1749 void *port_driver_priv, struct net_device *dev, 1750 u32 port_number, bool split, 1751 u32 split_port_subnumber) 1752 { 1753 struct mlxsw_core_port *mlxsw_core_port = 1754 &mlxsw_core->ports[local_port]; 1755 struct devlink_port *devlink_port = &mlxsw_core_port->devlink_port; 1756 1757 mlxsw_core_port->port_driver_priv = port_driver_priv; 1758 devlink_port_attrs_set(devlink_port, DEVLINK_PORT_FLAVOUR_PHYSICAL, 1759 port_number, split, split_port_subnumber); 1760 devlink_port_type_eth_set(devlink_port, dev); 1761 } 1762 EXPORT_SYMBOL(mlxsw_core_port_eth_set); 1763 1764 void mlxsw_core_port_ib_set(struct mlxsw_core *mlxsw_core, u8 local_port, 1765 void *port_driver_priv) 1766 { 1767 struct mlxsw_core_port *mlxsw_core_port = 1768 &mlxsw_core->ports[local_port]; 1769 struct devlink_port *devlink_port = &mlxsw_core_port->devlink_port; 1770 1771 mlxsw_core_port->port_driver_priv = port_driver_priv; 1772 devlink_port_type_ib_set(devlink_port, NULL); 1773 } 1774 EXPORT_SYMBOL(mlxsw_core_port_ib_set); 1775 1776 void mlxsw_core_port_clear(struct mlxsw_core *mlxsw_core, u8 local_port, 1777 void *port_driver_priv) 1778 { 1779 struct mlxsw_core_port *mlxsw_core_port = 1780 &mlxsw_core->ports[local_port]; 1781 struct devlink_port *devlink_port = &mlxsw_core_port->devlink_port; 1782 1783 mlxsw_core_port->port_driver_priv = port_driver_priv; 1784 devlink_port_type_clear(devlink_port); 1785 } 1786 EXPORT_SYMBOL(mlxsw_core_port_clear); 1787 1788 enum devlink_port_type mlxsw_core_port_type_get(struct mlxsw_core *mlxsw_core, 1789 u8 local_port) 1790 { 1791 struct mlxsw_core_port *mlxsw_core_port = 1792 &mlxsw_core->ports[local_port]; 1793 struct devlink_port *devlink_port = &mlxsw_core_port->devlink_port; 1794 1795 return devlink_port->type; 1796 } 1797 EXPORT_SYMBOL(mlxsw_core_port_type_get); 1798 1799 int mlxsw_core_port_get_phys_port_name(struct mlxsw_core *mlxsw_core, 1800 u8 local_port, char *name, size_t len) 1801 { 1802 struct mlxsw_core_port *mlxsw_core_port = 1803 &mlxsw_core->ports[local_port]; 1804 struct devlink_port *devlink_port = &mlxsw_core_port->devlink_port; 1805 1806 return devlink_port_get_phys_port_name(devlink_port, name, len); 1807 } 1808 EXPORT_SYMBOL(mlxsw_core_port_get_phys_port_name); 1809 1810 static void mlxsw_core_buf_dump_dbg(struct mlxsw_core *mlxsw_core, 1811 const char *buf, size_t size) 1812 { 1813 __be32 *m = (__be32 *) buf; 1814 int i; 1815 int count = size / sizeof(__be32); 1816 1817 for (i = count - 1; i >= 0; i--) 1818 if (m[i]) 1819 break; 1820 i++; 1821 count = i ? i : 1; 1822 for (i = 0; i < count; i += 4) 1823 dev_dbg(mlxsw_core->bus_info->dev, "%04x - %08x %08x %08x %08x\n", 1824 i * 4, be32_to_cpu(m[i]), be32_to_cpu(m[i + 1]), 1825 be32_to_cpu(m[i + 2]), be32_to_cpu(m[i + 3])); 1826 } 1827 1828 int mlxsw_cmd_exec(struct mlxsw_core *mlxsw_core, u16 opcode, u8 opcode_mod, 1829 u32 in_mod, bool out_mbox_direct, bool reset_ok, 1830 char *in_mbox, size_t in_mbox_size, 1831 char *out_mbox, size_t out_mbox_size) 1832 { 1833 u8 status; 1834 int err; 1835 1836 BUG_ON(in_mbox_size % sizeof(u32) || out_mbox_size % sizeof(u32)); 1837 if (!mlxsw_core->bus->cmd_exec) 1838 return -EOPNOTSUPP; 1839 1840 dev_dbg(mlxsw_core->bus_info->dev, "Cmd exec (opcode=%x(%s),opcode_mod=%x,in_mod=%x)\n", 1841 opcode, mlxsw_cmd_opcode_str(opcode), opcode_mod, in_mod); 1842 if (in_mbox) { 1843 dev_dbg(mlxsw_core->bus_info->dev, "Input mailbox:\n"); 1844 mlxsw_core_buf_dump_dbg(mlxsw_core, in_mbox, in_mbox_size); 1845 } 1846 1847 err = mlxsw_core->bus->cmd_exec(mlxsw_core->bus_priv, opcode, 1848 opcode_mod, in_mod, out_mbox_direct, 1849 in_mbox, in_mbox_size, 1850 out_mbox, out_mbox_size, &status); 1851 1852 if (!err && out_mbox) { 1853 dev_dbg(mlxsw_core->bus_info->dev, "Output mailbox:\n"); 1854 mlxsw_core_buf_dump_dbg(mlxsw_core, out_mbox, out_mbox_size); 1855 } 1856 1857 if (reset_ok && err == -EIO && 1858 status == MLXSW_CMD_STATUS_RUNNING_RESET) { 1859 err = 0; 1860 } else if (err == -EIO && status != MLXSW_CMD_STATUS_OK) { 1861 dev_err(mlxsw_core->bus_info->dev, "Cmd exec failed (opcode=%x(%s),opcode_mod=%x,in_mod=%x,status=%x(%s))\n", 1862 opcode, mlxsw_cmd_opcode_str(opcode), opcode_mod, 1863 in_mod, status, mlxsw_cmd_status_str(status)); 1864 } else if (err == -ETIMEDOUT) { 1865 dev_err(mlxsw_core->bus_info->dev, "Cmd exec timed-out (opcode=%x(%s),opcode_mod=%x,in_mod=%x)\n", 1866 opcode, mlxsw_cmd_opcode_str(opcode), opcode_mod, 1867 in_mod); 1868 } 1869 1870 return err; 1871 } 1872 EXPORT_SYMBOL(mlxsw_cmd_exec); 1873 1874 int mlxsw_core_schedule_dw(struct delayed_work *dwork, unsigned long delay) 1875 { 1876 return queue_delayed_work(mlxsw_wq, dwork, delay); 1877 } 1878 EXPORT_SYMBOL(mlxsw_core_schedule_dw); 1879 1880 bool mlxsw_core_schedule_work(struct work_struct *work) 1881 { 1882 return queue_work(mlxsw_owq, work); 1883 } 1884 EXPORT_SYMBOL(mlxsw_core_schedule_work); 1885 1886 void mlxsw_core_flush_owq(void) 1887 { 1888 flush_workqueue(mlxsw_owq); 1889 } 1890 EXPORT_SYMBOL(mlxsw_core_flush_owq); 1891 1892 int mlxsw_core_kvd_sizes_get(struct mlxsw_core *mlxsw_core, 1893 const struct mlxsw_config_profile *profile, 1894 u64 *p_single_size, u64 *p_double_size, 1895 u64 *p_linear_size) 1896 { 1897 struct mlxsw_driver *driver = mlxsw_core->driver; 1898 1899 if (!driver->kvd_sizes_get) 1900 return -EINVAL; 1901 1902 return driver->kvd_sizes_get(mlxsw_core, profile, 1903 p_single_size, p_double_size, 1904 p_linear_size); 1905 } 1906 EXPORT_SYMBOL(mlxsw_core_kvd_sizes_get); 1907 1908 void mlxsw_core_fw_flash_start(struct mlxsw_core *mlxsw_core) 1909 { 1910 mlxsw_core->fw_flash_in_progress = true; 1911 } 1912 EXPORT_SYMBOL(mlxsw_core_fw_flash_start); 1913 1914 void mlxsw_core_fw_flash_end(struct mlxsw_core *mlxsw_core) 1915 { 1916 mlxsw_core->fw_flash_in_progress = false; 1917 } 1918 EXPORT_SYMBOL(mlxsw_core_fw_flash_end); 1919 1920 int mlxsw_core_resources_query(struct mlxsw_core *mlxsw_core, char *mbox, 1921 struct mlxsw_res *res) 1922 { 1923 int index, i; 1924 u64 data; 1925 u16 id; 1926 int err; 1927 1928 if (!res) 1929 return 0; 1930 1931 mlxsw_cmd_mbox_zero(mbox); 1932 1933 for (index = 0; index < MLXSW_CMD_QUERY_RESOURCES_MAX_QUERIES; 1934 index++) { 1935 err = mlxsw_cmd_query_resources(mlxsw_core, mbox, index); 1936 if (err) 1937 return err; 1938 1939 for (i = 0; i < MLXSW_CMD_QUERY_RESOURCES_PER_QUERY; i++) { 1940 id = mlxsw_cmd_mbox_query_resource_id_get(mbox, i); 1941 data = mlxsw_cmd_mbox_query_resource_data_get(mbox, i); 1942 1943 if (id == MLXSW_CMD_QUERY_RESOURCES_TABLE_END_ID) 1944 return 0; 1945 1946 mlxsw_res_parse(res, id, data); 1947 } 1948 } 1949 1950 /* If after MLXSW_RESOURCES_QUERY_MAX_QUERIES we still didn't get 1951 * MLXSW_RESOURCES_TABLE_END_ID, something went bad in the FW. 1952 */ 1953 return -EIO; 1954 } 1955 EXPORT_SYMBOL(mlxsw_core_resources_query); 1956 1957 static int __init mlxsw_core_module_init(void) 1958 { 1959 int err; 1960 1961 mlxsw_wq = alloc_workqueue(mlxsw_core_driver_name, WQ_MEM_RECLAIM, 0); 1962 if (!mlxsw_wq) 1963 return -ENOMEM; 1964 mlxsw_owq = alloc_ordered_workqueue("%s_ordered", WQ_MEM_RECLAIM, 1965 mlxsw_core_driver_name); 1966 if (!mlxsw_owq) { 1967 err = -ENOMEM; 1968 goto err_alloc_ordered_workqueue; 1969 } 1970 return 0; 1971 1972 err_alloc_ordered_workqueue: 1973 destroy_workqueue(mlxsw_wq); 1974 return err; 1975 } 1976 1977 static void __exit mlxsw_core_module_exit(void) 1978 { 1979 destroy_workqueue(mlxsw_owq); 1980 destroy_workqueue(mlxsw_wq); 1981 } 1982 1983 module_init(mlxsw_core_module_init); 1984 module_exit(mlxsw_core_module_exit); 1985 1986 MODULE_LICENSE("Dual BSD/GPL"); 1987 MODULE_AUTHOR("Jiri Pirko <jiri@mellanox.com>"); 1988 MODULE_DESCRIPTION("Mellanox switch device core driver"); 1989