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 bool enable_string_tlv; 75 } emad; 76 struct { 77 u8 *mapping; /* lag_id+port_index to local_port mapping */ 78 } lag; 79 struct mlxsw_res res; 80 struct mlxsw_hwmon *hwmon; 81 struct mlxsw_thermal *thermal; 82 struct mlxsw_core_port *ports; 83 unsigned int max_ports; 84 bool fw_flash_in_progress; 85 unsigned long driver_priv[]; 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 bool mlxsw_core_res_query_enabled(const struct mlxsw_core *mlxsw_core) 126 { 127 return mlxsw_core->driver->res_query_enabled; 128 } 129 EXPORT_SYMBOL(mlxsw_core_res_query_enabled); 130 131 bool 132 mlxsw_core_fw_rev_minor_subminor_validate(const struct mlxsw_fw_rev *rev, 133 const struct mlxsw_fw_rev *req_rev) 134 { 135 return rev->minor > req_rev->minor || 136 (rev->minor == req_rev->minor && 137 rev->subminor >= req_rev->subminor); 138 } 139 EXPORT_SYMBOL(mlxsw_core_fw_rev_minor_subminor_validate); 140 141 struct mlxsw_rx_listener_item { 142 struct list_head list; 143 struct mlxsw_rx_listener rxl; 144 void *priv; 145 bool enabled; 146 }; 147 148 struct mlxsw_event_listener_item { 149 struct list_head list; 150 struct mlxsw_event_listener el; 151 void *priv; 152 }; 153 154 /****************** 155 * EMAD processing 156 ******************/ 157 158 /* emad_eth_hdr_dmac 159 * Destination MAC in EMAD's Ethernet header. 160 * Must be set to 01:02:c9:00:00:01 161 */ 162 MLXSW_ITEM_BUF(emad, eth_hdr, dmac, 0x00, 6); 163 164 /* emad_eth_hdr_smac 165 * Source MAC in EMAD's Ethernet header. 166 * Must be set to 00:02:c9:01:02:03 167 */ 168 MLXSW_ITEM_BUF(emad, eth_hdr, smac, 0x06, 6); 169 170 /* emad_eth_hdr_ethertype 171 * Ethertype in EMAD's Ethernet header. 172 * Must be set to 0x8932 173 */ 174 MLXSW_ITEM32(emad, eth_hdr, ethertype, 0x0C, 16, 16); 175 176 /* emad_eth_hdr_mlx_proto 177 * Mellanox protocol. 178 * Must be set to 0x0. 179 */ 180 MLXSW_ITEM32(emad, eth_hdr, mlx_proto, 0x0C, 8, 8); 181 182 /* emad_eth_hdr_ver 183 * Mellanox protocol version. 184 * Must be set to 0x0. 185 */ 186 MLXSW_ITEM32(emad, eth_hdr, ver, 0x0C, 4, 4); 187 188 /* emad_op_tlv_type 189 * Type of the TLV. 190 * Must be set to 0x1 (operation TLV). 191 */ 192 MLXSW_ITEM32(emad, op_tlv, type, 0x00, 27, 5); 193 194 /* emad_op_tlv_len 195 * Length of the operation TLV in u32. 196 * Must be set to 0x4. 197 */ 198 MLXSW_ITEM32(emad, op_tlv, len, 0x00, 16, 11); 199 200 /* emad_op_tlv_dr 201 * Direct route bit. Setting to 1 indicates the EMAD is a direct route 202 * EMAD. DR TLV must follow. 203 * 204 * Note: Currently not supported and must not be set. 205 */ 206 MLXSW_ITEM32(emad, op_tlv, dr, 0x00, 15, 1); 207 208 /* emad_op_tlv_status 209 * Returned status in case of EMAD response. Must be set to 0 in case 210 * of EMAD request. 211 * 0x0 - success 212 * 0x1 - device is busy. Requester should retry 213 * 0x2 - Mellanox protocol version not supported 214 * 0x3 - unknown TLV 215 * 0x4 - register not supported 216 * 0x5 - operation class not supported 217 * 0x6 - EMAD method not supported 218 * 0x7 - bad parameter (e.g. port out of range) 219 * 0x8 - resource not available 220 * 0x9 - message receipt acknowledgment. Requester should retry 221 * 0x70 - internal error 222 */ 223 MLXSW_ITEM32(emad, op_tlv, status, 0x00, 8, 7); 224 225 /* emad_op_tlv_register_id 226 * Register ID of register within register TLV. 227 */ 228 MLXSW_ITEM32(emad, op_tlv, register_id, 0x04, 16, 16); 229 230 /* emad_op_tlv_r 231 * Response bit. Setting to 1 indicates Response, otherwise request. 232 */ 233 MLXSW_ITEM32(emad, op_tlv, r, 0x04, 15, 1); 234 235 /* emad_op_tlv_method 236 * EMAD method type. 237 * 0x1 - query 238 * 0x2 - write 239 * 0x3 - send (currently not supported) 240 * 0x4 - event 241 */ 242 MLXSW_ITEM32(emad, op_tlv, method, 0x04, 8, 7); 243 244 /* emad_op_tlv_class 245 * EMAD operation class. Must be set to 0x1 (REG_ACCESS). 246 */ 247 MLXSW_ITEM32(emad, op_tlv, class, 0x04, 0, 8); 248 249 /* emad_op_tlv_tid 250 * EMAD transaction ID. Used for pairing request and response EMADs. 251 */ 252 MLXSW_ITEM64(emad, op_tlv, tid, 0x08, 0, 64); 253 254 /* emad_string_tlv_type 255 * Type of the TLV. 256 * Must be set to 0x2 (string TLV). 257 */ 258 MLXSW_ITEM32(emad, string_tlv, type, 0x00, 27, 5); 259 260 /* emad_string_tlv_len 261 * Length of the string TLV in u32. 262 */ 263 MLXSW_ITEM32(emad, string_tlv, len, 0x00, 16, 11); 264 265 #define MLXSW_EMAD_STRING_TLV_STRING_LEN 128 266 267 /* emad_string_tlv_string 268 * String provided by the device's firmware in case of erroneous register access 269 */ 270 MLXSW_ITEM_BUF(emad, string_tlv, string, 0x04, 271 MLXSW_EMAD_STRING_TLV_STRING_LEN); 272 273 /* emad_reg_tlv_type 274 * Type of the TLV. 275 * Must be set to 0x3 (register TLV). 276 */ 277 MLXSW_ITEM32(emad, reg_tlv, type, 0x00, 27, 5); 278 279 /* emad_reg_tlv_len 280 * Length of the operation TLV in u32. 281 */ 282 MLXSW_ITEM32(emad, reg_tlv, len, 0x00, 16, 11); 283 284 /* emad_end_tlv_type 285 * Type of the TLV. 286 * Must be set to 0x0 (end TLV). 287 */ 288 MLXSW_ITEM32(emad, end_tlv, type, 0x00, 27, 5); 289 290 /* emad_end_tlv_len 291 * Length of the end TLV in u32. 292 * Must be set to 1. 293 */ 294 MLXSW_ITEM32(emad, end_tlv, len, 0x00, 16, 11); 295 296 enum mlxsw_core_reg_access_type { 297 MLXSW_CORE_REG_ACCESS_TYPE_QUERY, 298 MLXSW_CORE_REG_ACCESS_TYPE_WRITE, 299 }; 300 301 static inline const char * 302 mlxsw_core_reg_access_type_str(enum mlxsw_core_reg_access_type type) 303 { 304 switch (type) { 305 case MLXSW_CORE_REG_ACCESS_TYPE_QUERY: 306 return "query"; 307 case MLXSW_CORE_REG_ACCESS_TYPE_WRITE: 308 return "write"; 309 } 310 BUG(); 311 } 312 313 static void mlxsw_emad_pack_end_tlv(char *end_tlv) 314 { 315 mlxsw_emad_end_tlv_type_set(end_tlv, MLXSW_EMAD_TLV_TYPE_END); 316 mlxsw_emad_end_tlv_len_set(end_tlv, MLXSW_EMAD_END_TLV_LEN); 317 } 318 319 static void mlxsw_emad_pack_reg_tlv(char *reg_tlv, 320 const struct mlxsw_reg_info *reg, 321 char *payload) 322 { 323 mlxsw_emad_reg_tlv_type_set(reg_tlv, MLXSW_EMAD_TLV_TYPE_REG); 324 mlxsw_emad_reg_tlv_len_set(reg_tlv, reg->len / sizeof(u32) + 1); 325 memcpy(reg_tlv + sizeof(u32), payload, reg->len); 326 } 327 328 static void mlxsw_emad_pack_string_tlv(char *string_tlv) 329 { 330 mlxsw_emad_string_tlv_type_set(string_tlv, MLXSW_EMAD_TLV_TYPE_STRING); 331 mlxsw_emad_string_tlv_len_set(string_tlv, MLXSW_EMAD_STRING_TLV_LEN); 332 } 333 334 static void mlxsw_emad_pack_op_tlv(char *op_tlv, 335 const struct mlxsw_reg_info *reg, 336 enum mlxsw_core_reg_access_type type, 337 u64 tid) 338 { 339 mlxsw_emad_op_tlv_type_set(op_tlv, MLXSW_EMAD_TLV_TYPE_OP); 340 mlxsw_emad_op_tlv_len_set(op_tlv, MLXSW_EMAD_OP_TLV_LEN); 341 mlxsw_emad_op_tlv_dr_set(op_tlv, 0); 342 mlxsw_emad_op_tlv_status_set(op_tlv, 0); 343 mlxsw_emad_op_tlv_register_id_set(op_tlv, reg->id); 344 mlxsw_emad_op_tlv_r_set(op_tlv, MLXSW_EMAD_OP_TLV_REQUEST); 345 if (type == MLXSW_CORE_REG_ACCESS_TYPE_QUERY) 346 mlxsw_emad_op_tlv_method_set(op_tlv, 347 MLXSW_EMAD_OP_TLV_METHOD_QUERY); 348 else 349 mlxsw_emad_op_tlv_method_set(op_tlv, 350 MLXSW_EMAD_OP_TLV_METHOD_WRITE); 351 mlxsw_emad_op_tlv_class_set(op_tlv, 352 MLXSW_EMAD_OP_TLV_CLASS_REG_ACCESS); 353 mlxsw_emad_op_tlv_tid_set(op_tlv, tid); 354 } 355 356 static int mlxsw_emad_construct_eth_hdr(struct sk_buff *skb) 357 { 358 char *eth_hdr = skb_push(skb, MLXSW_EMAD_ETH_HDR_LEN); 359 360 mlxsw_emad_eth_hdr_dmac_memcpy_to(eth_hdr, MLXSW_EMAD_EH_DMAC); 361 mlxsw_emad_eth_hdr_smac_memcpy_to(eth_hdr, MLXSW_EMAD_EH_SMAC); 362 mlxsw_emad_eth_hdr_ethertype_set(eth_hdr, MLXSW_EMAD_EH_ETHERTYPE); 363 mlxsw_emad_eth_hdr_mlx_proto_set(eth_hdr, MLXSW_EMAD_EH_MLX_PROTO); 364 mlxsw_emad_eth_hdr_ver_set(eth_hdr, MLXSW_EMAD_EH_PROTO_VERSION); 365 366 skb_reset_mac_header(skb); 367 368 return 0; 369 } 370 371 static void mlxsw_emad_construct(struct sk_buff *skb, 372 const struct mlxsw_reg_info *reg, 373 char *payload, 374 enum mlxsw_core_reg_access_type type, 375 u64 tid, bool enable_string_tlv) 376 { 377 char *buf; 378 379 buf = skb_push(skb, MLXSW_EMAD_END_TLV_LEN * sizeof(u32)); 380 mlxsw_emad_pack_end_tlv(buf); 381 382 buf = skb_push(skb, reg->len + sizeof(u32)); 383 mlxsw_emad_pack_reg_tlv(buf, reg, payload); 384 385 if (enable_string_tlv) { 386 buf = skb_push(skb, MLXSW_EMAD_STRING_TLV_LEN * sizeof(u32)); 387 mlxsw_emad_pack_string_tlv(buf); 388 } 389 390 buf = skb_push(skb, MLXSW_EMAD_OP_TLV_LEN * sizeof(u32)); 391 mlxsw_emad_pack_op_tlv(buf, reg, type, tid); 392 393 mlxsw_emad_construct_eth_hdr(skb); 394 } 395 396 struct mlxsw_emad_tlv_offsets { 397 u16 op_tlv; 398 u16 string_tlv; 399 u16 reg_tlv; 400 }; 401 402 static bool mlxsw_emad_tlv_is_string_tlv(const char *tlv) 403 { 404 u8 tlv_type = mlxsw_emad_string_tlv_type_get(tlv); 405 406 return tlv_type == MLXSW_EMAD_TLV_TYPE_STRING; 407 } 408 409 static void mlxsw_emad_tlv_parse(struct sk_buff *skb) 410 { 411 struct mlxsw_emad_tlv_offsets *offsets = 412 (struct mlxsw_emad_tlv_offsets *) skb->cb; 413 414 offsets->op_tlv = MLXSW_EMAD_ETH_HDR_LEN; 415 offsets->string_tlv = 0; 416 offsets->reg_tlv = MLXSW_EMAD_ETH_HDR_LEN + 417 MLXSW_EMAD_OP_TLV_LEN * sizeof(u32); 418 419 /* If string TLV is present, it must come after the operation TLV. */ 420 if (mlxsw_emad_tlv_is_string_tlv(skb->data + offsets->reg_tlv)) { 421 offsets->string_tlv = offsets->reg_tlv; 422 offsets->reg_tlv += MLXSW_EMAD_STRING_TLV_LEN * sizeof(u32); 423 } 424 } 425 426 static char *mlxsw_emad_op_tlv(const struct sk_buff *skb) 427 { 428 struct mlxsw_emad_tlv_offsets *offsets = 429 (struct mlxsw_emad_tlv_offsets *) skb->cb; 430 431 return ((char *) (skb->data + offsets->op_tlv)); 432 } 433 434 static char *mlxsw_emad_string_tlv(const struct sk_buff *skb) 435 { 436 struct mlxsw_emad_tlv_offsets *offsets = 437 (struct mlxsw_emad_tlv_offsets *) skb->cb; 438 439 if (!offsets->string_tlv) 440 return NULL; 441 442 return ((char *) (skb->data + offsets->string_tlv)); 443 } 444 445 static char *mlxsw_emad_reg_tlv(const struct sk_buff *skb) 446 { 447 struct mlxsw_emad_tlv_offsets *offsets = 448 (struct mlxsw_emad_tlv_offsets *) skb->cb; 449 450 return ((char *) (skb->data + offsets->reg_tlv)); 451 } 452 453 static char *mlxsw_emad_reg_payload(const char *reg_tlv) 454 { 455 return ((char *) (reg_tlv + sizeof(u32))); 456 } 457 458 static char *mlxsw_emad_reg_payload_cmd(const char *mbox) 459 { 460 return ((char *) (mbox + (MLXSW_EMAD_OP_TLV_LEN + 1) * sizeof(u32))); 461 } 462 463 static u64 mlxsw_emad_get_tid(const struct sk_buff *skb) 464 { 465 char *op_tlv; 466 467 op_tlv = mlxsw_emad_op_tlv(skb); 468 return mlxsw_emad_op_tlv_tid_get(op_tlv); 469 } 470 471 static bool mlxsw_emad_is_resp(const struct sk_buff *skb) 472 { 473 char *op_tlv; 474 475 op_tlv = mlxsw_emad_op_tlv(skb); 476 return (mlxsw_emad_op_tlv_r_get(op_tlv) == MLXSW_EMAD_OP_TLV_RESPONSE); 477 } 478 479 static int mlxsw_emad_process_status(char *op_tlv, 480 enum mlxsw_emad_op_tlv_status *p_status) 481 { 482 *p_status = mlxsw_emad_op_tlv_status_get(op_tlv); 483 484 switch (*p_status) { 485 case MLXSW_EMAD_OP_TLV_STATUS_SUCCESS: 486 return 0; 487 case MLXSW_EMAD_OP_TLV_STATUS_BUSY: 488 case MLXSW_EMAD_OP_TLV_STATUS_MESSAGE_RECEIPT_ACK: 489 return -EAGAIN; 490 case MLXSW_EMAD_OP_TLV_STATUS_VERSION_NOT_SUPPORTED: 491 case MLXSW_EMAD_OP_TLV_STATUS_UNKNOWN_TLV: 492 case MLXSW_EMAD_OP_TLV_STATUS_REGISTER_NOT_SUPPORTED: 493 case MLXSW_EMAD_OP_TLV_STATUS_CLASS_NOT_SUPPORTED: 494 case MLXSW_EMAD_OP_TLV_STATUS_METHOD_NOT_SUPPORTED: 495 case MLXSW_EMAD_OP_TLV_STATUS_BAD_PARAMETER: 496 case MLXSW_EMAD_OP_TLV_STATUS_RESOURCE_NOT_AVAILABLE: 497 case MLXSW_EMAD_OP_TLV_STATUS_INTERNAL_ERROR: 498 default: 499 return -EIO; 500 } 501 } 502 503 static int 504 mlxsw_emad_process_status_skb(struct sk_buff *skb, 505 enum mlxsw_emad_op_tlv_status *p_status) 506 { 507 return mlxsw_emad_process_status(mlxsw_emad_op_tlv(skb), p_status); 508 } 509 510 struct mlxsw_reg_trans { 511 struct list_head list; 512 struct list_head bulk_list; 513 struct mlxsw_core *core; 514 struct sk_buff *tx_skb; 515 struct mlxsw_tx_info tx_info; 516 struct delayed_work timeout_dw; 517 unsigned int retries; 518 u64 tid; 519 struct completion completion; 520 atomic_t active; 521 mlxsw_reg_trans_cb_t *cb; 522 unsigned long cb_priv; 523 const struct mlxsw_reg_info *reg; 524 enum mlxsw_core_reg_access_type type; 525 int err; 526 char *emad_err_string; 527 enum mlxsw_emad_op_tlv_status emad_status; 528 struct rcu_head rcu; 529 }; 530 531 static void mlxsw_emad_process_string_tlv(const struct sk_buff *skb, 532 struct mlxsw_reg_trans *trans) 533 { 534 char *string_tlv; 535 char *string; 536 537 string_tlv = mlxsw_emad_string_tlv(skb); 538 if (!string_tlv) 539 return; 540 541 trans->emad_err_string = kzalloc(MLXSW_EMAD_STRING_TLV_STRING_LEN, 542 GFP_ATOMIC); 543 if (!trans->emad_err_string) 544 return; 545 546 string = mlxsw_emad_string_tlv_string_data(string_tlv); 547 strlcpy(trans->emad_err_string, string, 548 MLXSW_EMAD_STRING_TLV_STRING_LEN); 549 } 550 551 #define MLXSW_EMAD_TIMEOUT_DURING_FW_FLASH_MS 3000 552 #define MLXSW_EMAD_TIMEOUT_MS 200 553 554 static void mlxsw_emad_trans_timeout_schedule(struct mlxsw_reg_trans *trans) 555 { 556 unsigned long timeout = msecs_to_jiffies(MLXSW_EMAD_TIMEOUT_MS); 557 558 if (trans->core->fw_flash_in_progress) 559 timeout = msecs_to_jiffies(MLXSW_EMAD_TIMEOUT_DURING_FW_FLASH_MS); 560 561 queue_delayed_work(trans->core->emad_wq, &trans->timeout_dw, timeout); 562 } 563 564 static int mlxsw_emad_transmit(struct mlxsw_core *mlxsw_core, 565 struct mlxsw_reg_trans *trans) 566 { 567 struct sk_buff *skb; 568 int err; 569 570 skb = skb_copy(trans->tx_skb, GFP_KERNEL); 571 if (!skb) 572 return -ENOMEM; 573 574 trace_devlink_hwmsg(priv_to_devlink(mlxsw_core), false, 0, 575 skb->data + mlxsw_core->driver->txhdr_len, 576 skb->len - mlxsw_core->driver->txhdr_len); 577 578 atomic_set(&trans->active, 1); 579 err = mlxsw_core_skb_transmit(mlxsw_core, skb, &trans->tx_info); 580 if (err) { 581 dev_kfree_skb(skb); 582 return err; 583 } 584 mlxsw_emad_trans_timeout_schedule(trans); 585 return 0; 586 } 587 588 static void mlxsw_emad_trans_finish(struct mlxsw_reg_trans *trans, int err) 589 { 590 struct mlxsw_core *mlxsw_core = trans->core; 591 592 dev_kfree_skb(trans->tx_skb); 593 spin_lock_bh(&mlxsw_core->emad.trans_list_lock); 594 list_del_rcu(&trans->list); 595 spin_unlock_bh(&mlxsw_core->emad.trans_list_lock); 596 trans->err = err; 597 complete(&trans->completion); 598 } 599 600 static void mlxsw_emad_transmit_retry(struct mlxsw_core *mlxsw_core, 601 struct mlxsw_reg_trans *trans) 602 { 603 int err; 604 605 if (trans->retries < MLXSW_EMAD_MAX_RETRY) { 606 trans->retries++; 607 err = mlxsw_emad_transmit(trans->core, trans); 608 if (err == 0) 609 return; 610 } else { 611 err = -EIO; 612 } 613 mlxsw_emad_trans_finish(trans, err); 614 } 615 616 static void mlxsw_emad_trans_timeout_work(struct work_struct *work) 617 { 618 struct mlxsw_reg_trans *trans = container_of(work, 619 struct mlxsw_reg_trans, 620 timeout_dw.work); 621 622 if (!atomic_dec_and_test(&trans->active)) 623 return; 624 625 mlxsw_emad_transmit_retry(trans->core, trans); 626 } 627 628 static void mlxsw_emad_process_response(struct mlxsw_core *mlxsw_core, 629 struct mlxsw_reg_trans *trans, 630 struct sk_buff *skb) 631 { 632 int err; 633 634 if (!atomic_dec_and_test(&trans->active)) 635 return; 636 637 err = mlxsw_emad_process_status_skb(skb, &trans->emad_status); 638 if (err == -EAGAIN) { 639 mlxsw_emad_transmit_retry(mlxsw_core, trans); 640 } else { 641 if (err == 0) { 642 char *reg_tlv = mlxsw_emad_reg_tlv(skb); 643 644 if (trans->cb) 645 trans->cb(mlxsw_core, 646 mlxsw_emad_reg_payload(reg_tlv), 647 trans->reg->len, trans->cb_priv); 648 } else { 649 mlxsw_emad_process_string_tlv(skb, trans); 650 } 651 mlxsw_emad_trans_finish(trans, err); 652 } 653 } 654 655 /* called with rcu read lock held */ 656 static void mlxsw_emad_rx_listener_func(struct sk_buff *skb, u8 local_port, 657 void *priv) 658 { 659 struct mlxsw_core *mlxsw_core = priv; 660 struct mlxsw_reg_trans *trans; 661 662 trace_devlink_hwmsg(priv_to_devlink(mlxsw_core), true, 0, 663 skb->data, skb->len); 664 665 mlxsw_emad_tlv_parse(skb); 666 667 if (!mlxsw_emad_is_resp(skb)) 668 goto free_skb; 669 670 list_for_each_entry_rcu(trans, &mlxsw_core->emad.trans_list, list) { 671 if (mlxsw_emad_get_tid(skb) == trans->tid) { 672 mlxsw_emad_process_response(mlxsw_core, trans, skb); 673 break; 674 } 675 } 676 677 free_skb: 678 dev_kfree_skb(skb); 679 } 680 681 static const struct mlxsw_listener mlxsw_emad_rx_listener = 682 MLXSW_RXL(mlxsw_emad_rx_listener_func, ETHEMAD, TRAP_TO_CPU, false, 683 EMAD, DISCARD); 684 685 static int mlxsw_emad_init(struct mlxsw_core *mlxsw_core) 686 { 687 struct workqueue_struct *emad_wq; 688 u64 tid; 689 int err; 690 691 if (!(mlxsw_core->bus->features & MLXSW_BUS_F_TXRX)) 692 return 0; 693 694 emad_wq = alloc_workqueue("mlxsw_core_emad", 0, 0); 695 if (!emad_wq) 696 return -ENOMEM; 697 mlxsw_core->emad_wq = emad_wq; 698 699 /* Set the upper 32 bits of the transaction ID field to a random 700 * number. This allows us to discard EMADs addressed to other 701 * devices. 702 */ 703 get_random_bytes(&tid, 4); 704 tid <<= 32; 705 atomic64_set(&mlxsw_core->emad.tid, tid); 706 707 INIT_LIST_HEAD(&mlxsw_core->emad.trans_list); 708 spin_lock_init(&mlxsw_core->emad.trans_list_lock); 709 710 err = mlxsw_core_trap_register(mlxsw_core, &mlxsw_emad_rx_listener, 711 mlxsw_core); 712 if (err) 713 return err; 714 715 err = mlxsw_core->driver->basic_trap_groups_set(mlxsw_core); 716 if (err) 717 goto err_emad_trap_set; 718 mlxsw_core->emad.use_emad = true; 719 720 return 0; 721 722 err_emad_trap_set: 723 mlxsw_core_trap_unregister(mlxsw_core, &mlxsw_emad_rx_listener, 724 mlxsw_core); 725 destroy_workqueue(mlxsw_core->emad_wq); 726 return err; 727 } 728 729 static void mlxsw_emad_fini(struct mlxsw_core *mlxsw_core) 730 { 731 732 if (!(mlxsw_core->bus->features & MLXSW_BUS_F_TXRX)) 733 return; 734 735 mlxsw_core->emad.use_emad = false; 736 mlxsw_core_trap_unregister(mlxsw_core, &mlxsw_emad_rx_listener, 737 mlxsw_core); 738 destroy_workqueue(mlxsw_core->emad_wq); 739 } 740 741 static struct sk_buff *mlxsw_emad_alloc(const struct mlxsw_core *mlxsw_core, 742 u16 reg_len, bool enable_string_tlv) 743 { 744 struct sk_buff *skb; 745 u16 emad_len; 746 747 emad_len = (reg_len + sizeof(u32) + MLXSW_EMAD_ETH_HDR_LEN + 748 (MLXSW_EMAD_OP_TLV_LEN + MLXSW_EMAD_END_TLV_LEN) * 749 sizeof(u32) + mlxsw_core->driver->txhdr_len); 750 if (enable_string_tlv) 751 emad_len += MLXSW_EMAD_STRING_TLV_LEN * sizeof(u32); 752 if (emad_len > MLXSW_EMAD_MAX_FRAME_LEN) 753 return NULL; 754 755 skb = netdev_alloc_skb(NULL, emad_len); 756 if (!skb) 757 return NULL; 758 memset(skb->data, 0, emad_len); 759 skb_reserve(skb, emad_len); 760 761 return skb; 762 } 763 764 static int mlxsw_emad_reg_access(struct mlxsw_core *mlxsw_core, 765 const struct mlxsw_reg_info *reg, 766 char *payload, 767 enum mlxsw_core_reg_access_type type, 768 struct mlxsw_reg_trans *trans, 769 struct list_head *bulk_list, 770 mlxsw_reg_trans_cb_t *cb, 771 unsigned long cb_priv, u64 tid) 772 { 773 bool enable_string_tlv; 774 struct sk_buff *skb; 775 int err; 776 777 dev_dbg(mlxsw_core->bus_info->dev, "EMAD reg access (tid=%llx,reg_id=%x(%s),type=%s)\n", 778 tid, reg->id, mlxsw_reg_id_str(reg->id), 779 mlxsw_core_reg_access_type_str(type)); 780 781 /* Since this can be changed during emad_reg_access, read it once and 782 * use the value all the way. 783 */ 784 enable_string_tlv = mlxsw_core->emad.enable_string_tlv; 785 786 skb = mlxsw_emad_alloc(mlxsw_core, reg->len, enable_string_tlv); 787 if (!skb) 788 return -ENOMEM; 789 790 list_add_tail(&trans->bulk_list, bulk_list); 791 trans->core = mlxsw_core; 792 trans->tx_skb = skb; 793 trans->tx_info.local_port = MLXSW_PORT_CPU_PORT; 794 trans->tx_info.is_emad = true; 795 INIT_DELAYED_WORK(&trans->timeout_dw, mlxsw_emad_trans_timeout_work); 796 trans->tid = tid; 797 init_completion(&trans->completion); 798 trans->cb = cb; 799 trans->cb_priv = cb_priv; 800 trans->reg = reg; 801 trans->type = type; 802 803 mlxsw_emad_construct(skb, reg, payload, type, trans->tid, 804 enable_string_tlv); 805 mlxsw_core->driver->txhdr_construct(skb, &trans->tx_info); 806 807 spin_lock_bh(&mlxsw_core->emad.trans_list_lock); 808 list_add_tail_rcu(&trans->list, &mlxsw_core->emad.trans_list); 809 spin_unlock_bh(&mlxsw_core->emad.trans_list_lock); 810 err = mlxsw_emad_transmit(mlxsw_core, trans); 811 if (err) 812 goto err_out; 813 return 0; 814 815 err_out: 816 spin_lock_bh(&mlxsw_core->emad.trans_list_lock); 817 list_del_rcu(&trans->list); 818 spin_unlock_bh(&mlxsw_core->emad.trans_list_lock); 819 list_del(&trans->bulk_list); 820 dev_kfree_skb(trans->tx_skb); 821 return err; 822 } 823 824 /***************** 825 * Core functions 826 *****************/ 827 828 int mlxsw_core_driver_register(struct mlxsw_driver *mlxsw_driver) 829 { 830 spin_lock(&mlxsw_core_driver_list_lock); 831 list_add_tail(&mlxsw_driver->list, &mlxsw_core_driver_list); 832 spin_unlock(&mlxsw_core_driver_list_lock); 833 return 0; 834 } 835 EXPORT_SYMBOL(mlxsw_core_driver_register); 836 837 void mlxsw_core_driver_unregister(struct mlxsw_driver *mlxsw_driver) 838 { 839 spin_lock(&mlxsw_core_driver_list_lock); 840 list_del(&mlxsw_driver->list); 841 spin_unlock(&mlxsw_core_driver_list_lock); 842 } 843 EXPORT_SYMBOL(mlxsw_core_driver_unregister); 844 845 static struct mlxsw_driver *__driver_find(const char *kind) 846 { 847 struct mlxsw_driver *mlxsw_driver; 848 849 list_for_each_entry(mlxsw_driver, &mlxsw_core_driver_list, list) { 850 if (strcmp(mlxsw_driver->kind, kind) == 0) 851 return mlxsw_driver; 852 } 853 return NULL; 854 } 855 856 static struct mlxsw_driver *mlxsw_core_driver_get(const char *kind) 857 { 858 struct mlxsw_driver *mlxsw_driver; 859 860 spin_lock(&mlxsw_core_driver_list_lock); 861 mlxsw_driver = __driver_find(kind); 862 spin_unlock(&mlxsw_core_driver_list_lock); 863 return mlxsw_driver; 864 } 865 866 static int mlxsw_devlink_port_split(struct devlink *devlink, 867 unsigned int port_index, 868 unsigned int count, 869 struct netlink_ext_ack *extack) 870 { 871 struct mlxsw_core *mlxsw_core = devlink_priv(devlink); 872 873 if (port_index >= mlxsw_core->max_ports) { 874 NL_SET_ERR_MSG_MOD(extack, "Port index exceeds maximum number of ports"); 875 return -EINVAL; 876 } 877 if (!mlxsw_core->driver->port_split) 878 return -EOPNOTSUPP; 879 return mlxsw_core->driver->port_split(mlxsw_core, port_index, count, 880 extack); 881 } 882 883 static int mlxsw_devlink_port_unsplit(struct devlink *devlink, 884 unsigned int port_index, 885 struct netlink_ext_ack *extack) 886 { 887 struct mlxsw_core *mlxsw_core = devlink_priv(devlink); 888 889 if (port_index >= mlxsw_core->max_ports) { 890 NL_SET_ERR_MSG_MOD(extack, "Port index exceeds maximum number of ports"); 891 return -EINVAL; 892 } 893 if (!mlxsw_core->driver->port_unsplit) 894 return -EOPNOTSUPP; 895 return mlxsw_core->driver->port_unsplit(mlxsw_core, port_index, 896 extack); 897 } 898 899 static int 900 mlxsw_devlink_sb_pool_get(struct devlink *devlink, 901 unsigned int sb_index, u16 pool_index, 902 struct devlink_sb_pool_info *pool_info) 903 { 904 struct mlxsw_core *mlxsw_core = devlink_priv(devlink); 905 struct mlxsw_driver *mlxsw_driver = mlxsw_core->driver; 906 907 if (!mlxsw_driver->sb_pool_get) 908 return -EOPNOTSUPP; 909 return mlxsw_driver->sb_pool_get(mlxsw_core, sb_index, 910 pool_index, pool_info); 911 } 912 913 static int 914 mlxsw_devlink_sb_pool_set(struct devlink *devlink, 915 unsigned int sb_index, u16 pool_index, u32 size, 916 enum devlink_sb_threshold_type threshold_type, 917 struct netlink_ext_ack *extack) 918 { 919 struct mlxsw_core *mlxsw_core = devlink_priv(devlink); 920 struct mlxsw_driver *mlxsw_driver = mlxsw_core->driver; 921 922 if (!mlxsw_driver->sb_pool_set) 923 return -EOPNOTSUPP; 924 return mlxsw_driver->sb_pool_set(mlxsw_core, sb_index, 925 pool_index, size, threshold_type, 926 extack); 927 } 928 929 static void *__dl_port(struct devlink_port *devlink_port) 930 { 931 return container_of(devlink_port, struct mlxsw_core_port, devlink_port); 932 } 933 934 static int mlxsw_devlink_port_type_set(struct devlink_port *devlink_port, 935 enum devlink_port_type port_type) 936 { 937 struct mlxsw_core *mlxsw_core = devlink_priv(devlink_port->devlink); 938 struct mlxsw_driver *mlxsw_driver = mlxsw_core->driver; 939 struct mlxsw_core_port *mlxsw_core_port = __dl_port(devlink_port); 940 941 if (!mlxsw_driver->port_type_set) 942 return -EOPNOTSUPP; 943 944 return mlxsw_driver->port_type_set(mlxsw_core, 945 mlxsw_core_port->local_port, 946 port_type); 947 } 948 949 static int mlxsw_devlink_sb_port_pool_get(struct devlink_port *devlink_port, 950 unsigned int sb_index, u16 pool_index, 951 u32 *p_threshold) 952 { 953 struct mlxsw_core *mlxsw_core = devlink_priv(devlink_port->devlink); 954 struct mlxsw_driver *mlxsw_driver = mlxsw_core->driver; 955 struct mlxsw_core_port *mlxsw_core_port = __dl_port(devlink_port); 956 957 if (!mlxsw_driver->sb_port_pool_get || 958 !mlxsw_core_port_check(mlxsw_core_port)) 959 return -EOPNOTSUPP; 960 return mlxsw_driver->sb_port_pool_get(mlxsw_core_port, sb_index, 961 pool_index, p_threshold); 962 } 963 964 static int mlxsw_devlink_sb_port_pool_set(struct devlink_port *devlink_port, 965 unsigned int sb_index, u16 pool_index, 966 u32 threshold, 967 struct netlink_ext_ack *extack) 968 { 969 struct mlxsw_core *mlxsw_core = devlink_priv(devlink_port->devlink); 970 struct mlxsw_driver *mlxsw_driver = mlxsw_core->driver; 971 struct mlxsw_core_port *mlxsw_core_port = __dl_port(devlink_port); 972 973 if (!mlxsw_driver->sb_port_pool_set || 974 !mlxsw_core_port_check(mlxsw_core_port)) 975 return -EOPNOTSUPP; 976 return mlxsw_driver->sb_port_pool_set(mlxsw_core_port, sb_index, 977 pool_index, threshold, extack); 978 } 979 980 static int 981 mlxsw_devlink_sb_tc_pool_bind_get(struct devlink_port *devlink_port, 982 unsigned int sb_index, u16 tc_index, 983 enum devlink_sb_pool_type pool_type, 984 u16 *p_pool_index, u32 *p_threshold) 985 { 986 struct mlxsw_core *mlxsw_core = devlink_priv(devlink_port->devlink); 987 struct mlxsw_driver *mlxsw_driver = mlxsw_core->driver; 988 struct mlxsw_core_port *mlxsw_core_port = __dl_port(devlink_port); 989 990 if (!mlxsw_driver->sb_tc_pool_bind_get || 991 !mlxsw_core_port_check(mlxsw_core_port)) 992 return -EOPNOTSUPP; 993 return mlxsw_driver->sb_tc_pool_bind_get(mlxsw_core_port, sb_index, 994 tc_index, pool_type, 995 p_pool_index, p_threshold); 996 } 997 998 static int 999 mlxsw_devlink_sb_tc_pool_bind_set(struct devlink_port *devlink_port, 1000 unsigned int sb_index, u16 tc_index, 1001 enum devlink_sb_pool_type pool_type, 1002 u16 pool_index, u32 threshold, 1003 struct netlink_ext_ack *extack) 1004 { 1005 struct mlxsw_core *mlxsw_core = devlink_priv(devlink_port->devlink); 1006 struct mlxsw_driver *mlxsw_driver = mlxsw_core->driver; 1007 struct mlxsw_core_port *mlxsw_core_port = __dl_port(devlink_port); 1008 1009 if (!mlxsw_driver->sb_tc_pool_bind_set || 1010 !mlxsw_core_port_check(mlxsw_core_port)) 1011 return -EOPNOTSUPP; 1012 return mlxsw_driver->sb_tc_pool_bind_set(mlxsw_core_port, sb_index, 1013 tc_index, pool_type, 1014 pool_index, threshold, extack); 1015 } 1016 1017 static int mlxsw_devlink_sb_occ_snapshot(struct devlink *devlink, 1018 unsigned int sb_index) 1019 { 1020 struct mlxsw_core *mlxsw_core = devlink_priv(devlink); 1021 struct mlxsw_driver *mlxsw_driver = mlxsw_core->driver; 1022 1023 if (!mlxsw_driver->sb_occ_snapshot) 1024 return -EOPNOTSUPP; 1025 return mlxsw_driver->sb_occ_snapshot(mlxsw_core, sb_index); 1026 } 1027 1028 static int mlxsw_devlink_sb_occ_max_clear(struct devlink *devlink, 1029 unsigned int sb_index) 1030 { 1031 struct mlxsw_core *mlxsw_core = devlink_priv(devlink); 1032 struct mlxsw_driver *mlxsw_driver = mlxsw_core->driver; 1033 1034 if (!mlxsw_driver->sb_occ_max_clear) 1035 return -EOPNOTSUPP; 1036 return mlxsw_driver->sb_occ_max_clear(mlxsw_core, sb_index); 1037 } 1038 1039 static int 1040 mlxsw_devlink_sb_occ_port_pool_get(struct devlink_port *devlink_port, 1041 unsigned int sb_index, u16 pool_index, 1042 u32 *p_cur, u32 *p_max) 1043 { 1044 struct mlxsw_core *mlxsw_core = devlink_priv(devlink_port->devlink); 1045 struct mlxsw_driver *mlxsw_driver = mlxsw_core->driver; 1046 struct mlxsw_core_port *mlxsw_core_port = __dl_port(devlink_port); 1047 1048 if (!mlxsw_driver->sb_occ_port_pool_get || 1049 !mlxsw_core_port_check(mlxsw_core_port)) 1050 return -EOPNOTSUPP; 1051 return mlxsw_driver->sb_occ_port_pool_get(mlxsw_core_port, sb_index, 1052 pool_index, p_cur, p_max); 1053 } 1054 1055 static int 1056 mlxsw_devlink_sb_occ_tc_port_bind_get(struct devlink_port *devlink_port, 1057 unsigned int sb_index, u16 tc_index, 1058 enum devlink_sb_pool_type pool_type, 1059 u32 *p_cur, u32 *p_max) 1060 { 1061 struct mlxsw_core *mlxsw_core = devlink_priv(devlink_port->devlink); 1062 struct mlxsw_driver *mlxsw_driver = mlxsw_core->driver; 1063 struct mlxsw_core_port *mlxsw_core_port = __dl_port(devlink_port); 1064 1065 if (!mlxsw_driver->sb_occ_tc_port_bind_get || 1066 !mlxsw_core_port_check(mlxsw_core_port)) 1067 return -EOPNOTSUPP; 1068 return mlxsw_driver->sb_occ_tc_port_bind_get(mlxsw_core_port, 1069 sb_index, tc_index, 1070 pool_type, p_cur, p_max); 1071 } 1072 1073 static int 1074 mlxsw_devlink_info_get(struct devlink *devlink, struct devlink_info_req *req, 1075 struct netlink_ext_ack *extack) 1076 { 1077 struct mlxsw_core *mlxsw_core = devlink_priv(devlink); 1078 char fw_info_psid[MLXSW_REG_MGIR_FW_INFO_PSID_SIZE]; 1079 u32 hw_rev, fw_major, fw_minor, fw_sub_minor; 1080 char mgir_pl[MLXSW_REG_MGIR_LEN]; 1081 char buf[32]; 1082 int err; 1083 1084 err = devlink_info_driver_name_put(req, 1085 mlxsw_core->bus_info->device_kind); 1086 if (err) 1087 return err; 1088 1089 mlxsw_reg_mgir_pack(mgir_pl); 1090 err = mlxsw_reg_query(mlxsw_core, MLXSW_REG(mgir), mgir_pl); 1091 if (err) 1092 return err; 1093 mlxsw_reg_mgir_unpack(mgir_pl, &hw_rev, fw_info_psid, &fw_major, 1094 &fw_minor, &fw_sub_minor); 1095 1096 sprintf(buf, "%X", hw_rev); 1097 err = devlink_info_version_fixed_put(req, "hw.revision", buf); 1098 if (err) 1099 return err; 1100 1101 err = devlink_info_version_fixed_put(req, "fw.psid", fw_info_psid); 1102 if (err) 1103 return err; 1104 1105 sprintf(buf, "%d.%d.%d", fw_major, fw_minor, fw_sub_minor); 1106 err = devlink_info_version_running_put(req, "fw.version", buf); 1107 if (err) 1108 return err; 1109 1110 return 0; 1111 } 1112 1113 static int 1114 mlxsw_devlink_core_bus_device_reload_down(struct devlink *devlink, 1115 bool netns_change, 1116 struct netlink_ext_ack *extack) 1117 { 1118 struct mlxsw_core *mlxsw_core = devlink_priv(devlink); 1119 1120 if (!(mlxsw_core->bus->features & MLXSW_BUS_F_RESET)) 1121 return -EOPNOTSUPP; 1122 1123 mlxsw_core_bus_device_unregister(mlxsw_core, true); 1124 return 0; 1125 } 1126 1127 static int 1128 mlxsw_devlink_core_bus_device_reload_up(struct devlink *devlink, 1129 struct netlink_ext_ack *extack) 1130 { 1131 struct mlxsw_core *mlxsw_core = devlink_priv(devlink); 1132 1133 return mlxsw_core_bus_device_register(mlxsw_core->bus_info, 1134 mlxsw_core->bus, 1135 mlxsw_core->bus_priv, true, 1136 devlink, extack); 1137 } 1138 1139 static int mlxsw_devlink_flash_update(struct devlink *devlink, 1140 const char *file_name, 1141 const char *component, 1142 struct netlink_ext_ack *extack) 1143 { 1144 struct mlxsw_core *mlxsw_core = devlink_priv(devlink); 1145 struct mlxsw_driver *mlxsw_driver = mlxsw_core->driver; 1146 1147 if (!mlxsw_driver->flash_update) 1148 return -EOPNOTSUPP; 1149 return mlxsw_driver->flash_update(mlxsw_core, file_name, 1150 component, extack); 1151 } 1152 1153 static int mlxsw_devlink_trap_init(struct devlink *devlink, 1154 const struct devlink_trap *trap, 1155 void *trap_ctx) 1156 { 1157 struct mlxsw_core *mlxsw_core = devlink_priv(devlink); 1158 struct mlxsw_driver *mlxsw_driver = mlxsw_core->driver; 1159 1160 if (!mlxsw_driver->trap_init) 1161 return -EOPNOTSUPP; 1162 return mlxsw_driver->trap_init(mlxsw_core, trap, trap_ctx); 1163 } 1164 1165 static void mlxsw_devlink_trap_fini(struct devlink *devlink, 1166 const struct devlink_trap *trap, 1167 void *trap_ctx) 1168 { 1169 struct mlxsw_core *mlxsw_core = devlink_priv(devlink); 1170 struct mlxsw_driver *mlxsw_driver = mlxsw_core->driver; 1171 1172 if (!mlxsw_driver->trap_fini) 1173 return; 1174 mlxsw_driver->trap_fini(mlxsw_core, trap, trap_ctx); 1175 } 1176 1177 static int mlxsw_devlink_trap_action_set(struct devlink *devlink, 1178 const struct devlink_trap *trap, 1179 enum devlink_trap_action action) 1180 { 1181 struct mlxsw_core *mlxsw_core = devlink_priv(devlink); 1182 struct mlxsw_driver *mlxsw_driver = mlxsw_core->driver; 1183 1184 if (!mlxsw_driver->trap_action_set) 1185 return -EOPNOTSUPP; 1186 return mlxsw_driver->trap_action_set(mlxsw_core, trap, action); 1187 } 1188 1189 static int 1190 mlxsw_devlink_trap_group_init(struct devlink *devlink, 1191 const struct devlink_trap_group *group) 1192 { 1193 struct mlxsw_core *mlxsw_core = devlink_priv(devlink); 1194 struct mlxsw_driver *mlxsw_driver = mlxsw_core->driver; 1195 1196 if (!mlxsw_driver->trap_group_init) 1197 return -EOPNOTSUPP; 1198 return mlxsw_driver->trap_group_init(mlxsw_core, group); 1199 } 1200 1201 static int 1202 mlxsw_devlink_trap_group_set(struct devlink *devlink, 1203 const struct devlink_trap_group *group, 1204 const struct devlink_trap_policer *policer) 1205 { 1206 struct mlxsw_core *mlxsw_core = devlink_priv(devlink); 1207 struct mlxsw_driver *mlxsw_driver = mlxsw_core->driver; 1208 1209 if (!mlxsw_driver->trap_group_set) 1210 return -EOPNOTSUPP; 1211 return mlxsw_driver->trap_group_set(mlxsw_core, group, policer); 1212 } 1213 1214 static int 1215 mlxsw_devlink_trap_policer_init(struct devlink *devlink, 1216 const struct devlink_trap_policer *policer) 1217 { 1218 struct mlxsw_core *mlxsw_core = devlink_priv(devlink); 1219 struct mlxsw_driver *mlxsw_driver = mlxsw_core->driver; 1220 1221 if (!mlxsw_driver->trap_policer_init) 1222 return -EOPNOTSUPP; 1223 return mlxsw_driver->trap_policer_init(mlxsw_core, policer); 1224 } 1225 1226 static void 1227 mlxsw_devlink_trap_policer_fini(struct devlink *devlink, 1228 const struct devlink_trap_policer *policer) 1229 { 1230 struct mlxsw_core *mlxsw_core = devlink_priv(devlink); 1231 struct mlxsw_driver *mlxsw_driver = mlxsw_core->driver; 1232 1233 if (!mlxsw_driver->trap_policer_fini) 1234 return; 1235 mlxsw_driver->trap_policer_fini(mlxsw_core, policer); 1236 } 1237 1238 static int 1239 mlxsw_devlink_trap_policer_set(struct devlink *devlink, 1240 const struct devlink_trap_policer *policer, 1241 u64 rate, u64 burst, 1242 struct netlink_ext_ack *extack) 1243 { 1244 struct mlxsw_core *mlxsw_core = devlink_priv(devlink); 1245 struct mlxsw_driver *mlxsw_driver = mlxsw_core->driver; 1246 1247 if (!mlxsw_driver->trap_policer_set) 1248 return -EOPNOTSUPP; 1249 return mlxsw_driver->trap_policer_set(mlxsw_core, policer, rate, burst, 1250 extack); 1251 } 1252 1253 static int 1254 mlxsw_devlink_trap_policer_counter_get(struct devlink *devlink, 1255 const struct devlink_trap_policer *policer, 1256 u64 *p_drops) 1257 { 1258 struct mlxsw_core *mlxsw_core = devlink_priv(devlink); 1259 struct mlxsw_driver *mlxsw_driver = mlxsw_core->driver; 1260 1261 if (!mlxsw_driver->trap_policer_counter_get) 1262 return -EOPNOTSUPP; 1263 return mlxsw_driver->trap_policer_counter_get(mlxsw_core, policer, 1264 p_drops); 1265 } 1266 1267 static const struct devlink_ops mlxsw_devlink_ops = { 1268 .reload_down = mlxsw_devlink_core_bus_device_reload_down, 1269 .reload_up = mlxsw_devlink_core_bus_device_reload_up, 1270 .port_type_set = mlxsw_devlink_port_type_set, 1271 .port_split = mlxsw_devlink_port_split, 1272 .port_unsplit = mlxsw_devlink_port_unsplit, 1273 .sb_pool_get = mlxsw_devlink_sb_pool_get, 1274 .sb_pool_set = mlxsw_devlink_sb_pool_set, 1275 .sb_port_pool_get = mlxsw_devlink_sb_port_pool_get, 1276 .sb_port_pool_set = mlxsw_devlink_sb_port_pool_set, 1277 .sb_tc_pool_bind_get = mlxsw_devlink_sb_tc_pool_bind_get, 1278 .sb_tc_pool_bind_set = mlxsw_devlink_sb_tc_pool_bind_set, 1279 .sb_occ_snapshot = mlxsw_devlink_sb_occ_snapshot, 1280 .sb_occ_max_clear = mlxsw_devlink_sb_occ_max_clear, 1281 .sb_occ_port_pool_get = mlxsw_devlink_sb_occ_port_pool_get, 1282 .sb_occ_tc_port_bind_get = mlxsw_devlink_sb_occ_tc_port_bind_get, 1283 .info_get = mlxsw_devlink_info_get, 1284 .flash_update = mlxsw_devlink_flash_update, 1285 .trap_init = mlxsw_devlink_trap_init, 1286 .trap_fini = mlxsw_devlink_trap_fini, 1287 .trap_action_set = mlxsw_devlink_trap_action_set, 1288 .trap_group_init = mlxsw_devlink_trap_group_init, 1289 .trap_group_set = mlxsw_devlink_trap_group_set, 1290 .trap_policer_init = mlxsw_devlink_trap_policer_init, 1291 .trap_policer_fini = mlxsw_devlink_trap_policer_fini, 1292 .trap_policer_set = mlxsw_devlink_trap_policer_set, 1293 .trap_policer_counter_get = mlxsw_devlink_trap_policer_counter_get, 1294 }; 1295 1296 static int 1297 __mlxsw_core_bus_device_register(const struct mlxsw_bus_info *mlxsw_bus_info, 1298 const struct mlxsw_bus *mlxsw_bus, 1299 void *bus_priv, bool reload, 1300 struct devlink *devlink, 1301 struct netlink_ext_ack *extack) 1302 { 1303 const char *device_kind = mlxsw_bus_info->device_kind; 1304 struct mlxsw_core *mlxsw_core; 1305 struct mlxsw_driver *mlxsw_driver; 1306 struct mlxsw_res *res; 1307 size_t alloc_size; 1308 int err; 1309 1310 mlxsw_driver = mlxsw_core_driver_get(device_kind); 1311 if (!mlxsw_driver) 1312 return -EINVAL; 1313 1314 if (!reload) { 1315 alloc_size = sizeof(*mlxsw_core) + mlxsw_driver->priv_size; 1316 devlink = devlink_alloc(&mlxsw_devlink_ops, alloc_size); 1317 if (!devlink) { 1318 err = -ENOMEM; 1319 goto err_devlink_alloc; 1320 } 1321 } 1322 1323 mlxsw_core = devlink_priv(devlink); 1324 INIT_LIST_HEAD(&mlxsw_core->rx_listener_list); 1325 INIT_LIST_HEAD(&mlxsw_core->event_listener_list); 1326 mlxsw_core->driver = mlxsw_driver; 1327 mlxsw_core->bus = mlxsw_bus; 1328 mlxsw_core->bus_priv = bus_priv; 1329 mlxsw_core->bus_info = mlxsw_bus_info; 1330 1331 res = mlxsw_driver->res_query_enabled ? &mlxsw_core->res : NULL; 1332 err = mlxsw_bus->init(bus_priv, mlxsw_core, mlxsw_driver->profile, res); 1333 if (err) 1334 goto err_bus_init; 1335 1336 if (mlxsw_driver->resources_register && !reload) { 1337 err = mlxsw_driver->resources_register(mlxsw_core); 1338 if (err) 1339 goto err_register_resources; 1340 } 1341 1342 err = mlxsw_ports_init(mlxsw_core); 1343 if (err) 1344 goto err_ports_init; 1345 1346 if (MLXSW_CORE_RES_VALID(mlxsw_core, MAX_LAG) && 1347 MLXSW_CORE_RES_VALID(mlxsw_core, MAX_LAG_MEMBERS)) { 1348 alloc_size = sizeof(u8) * 1349 MLXSW_CORE_RES_GET(mlxsw_core, MAX_LAG) * 1350 MLXSW_CORE_RES_GET(mlxsw_core, MAX_LAG_MEMBERS); 1351 mlxsw_core->lag.mapping = kzalloc(alloc_size, GFP_KERNEL); 1352 if (!mlxsw_core->lag.mapping) { 1353 err = -ENOMEM; 1354 goto err_alloc_lag_mapping; 1355 } 1356 } 1357 1358 err = mlxsw_emad_init(mlxsw_core); 1359 if (err) 1360 goto err_emad_init; 1361 1362 if (!reload) { 1363 err = devlink_register(devlink, mlxsw_bus_info->dev); 1364 if (err) 1365 goto err_devlink_register; 1366 } 1367 1368 if (mlxsw_driver->params_register && !reload) { 1369 err = mlxsw_driver->params_register(mlxsw_core); 1370 if (err) 1371 goto err_register_params; 1372 } 1373 1374 if (mlxsw_driver->init) { 1375 err = mlxsw_driver->init(mlxsw_core, mlxsw_bus_info, extack); 1376 if (err) 1377 goto err_driver_init; 1378 } 1379 1380 err = mlxsw_hwmon_init(mlxsw_core, mlxsw_bus_info, &mlxsw_core->hwmon); 1381 if (err) 1382 goto err_hwmon_init; 1383 1384 err = mlxsw_thermal_init(mlxsw_core, mlxsw_bus_info, 1385 &mlxsw_core->thermal); 1386 if (err) 1387 goto err_thermal_init; 1388 1389 if (mlxsw_driver->params_register) 1390 devlink_params_publish(devlink); 1391 1392 if (!reload) 1393 devlink_reload_enable(devlink); 1394 1395 return 0; 1396 1397 err_thermal_init: 1398 mlxsw_hwmon_fini(mlxsw_core->hwmon); 1399 err_hwmon_init: 1400 if (mlxsw_core->driver->fini) 1401 mlxsw_core->driver->fini(mlxsw_core); 1402 err_driver_init: 1403 if (mlxsw_driver->params_unregister && !reload) 1404 mlxsw_driver->params_unregister(mlxsw_core); 1405 err_register_params: 1406 if (!reload) 1407 devlink_unregister(devlink); 1408 err_devlink_register: 1409 mlxsw_emad_fini(mlxsw_core); 1410 err_emad_init: 1411 kfree(mlxsw_core->lag.mapping); 1412 err_alloc_lag_mapping: 1413 mlxsw_ports_fini(mlxsw_core); 1414 err_ports_init: 1415 if (!reload) 1416 devlink_resources_unregister(devlink, NULL); 1417 err_register_resources: 1418 mlxsw_bus->fini(bus_priv); 1419 err_bus_init: 1420 if (!reload) 1421 devlink_free(devlink); 1422 err_devlink_alloc: 1423 return err; 1424 } 1425 1426 int mlxsw_core_bus_device_register(const struct mlxsw_bus_info *mlxsw_bus_info, 1427 const struct mlxsw_bus *mlxsw_bus, 1428 void *bus_priv, bool reload, 1429 struct devlink *devlink, 1430 struct netlink_ext_ack *extack) 1431 { 1432 bool called_again = false; 1433 int err; 1434 1435 again: 1436 err = __mlxsw_core_bus_device_register(mlxsw_bus_info, mlxsw_bus, 1437 bus_priv, reload, 1438 devlink, extack); 1439 /* -EAGAIN is returned in case the FW was updated. FW needs 1440 * a reset, so lets try to call __mlxsw_core_bus_device_register() 1441 * again. 1442 */ 1443 if (err == -EAGAIN && !called_again) { 1444 called_again = true; 1445 goto again; 1446 } 1447 1448 return err; 1449 } 1450 EXPORT_SYMBOL(mlxsw_core_bus_device_register); 1451 1452 void mlxsw_core_bus_device_unregister(struct mlxsw_core *mlxsw_core, 1453 bool reload) 1454 { 1455 struct devlink *devlink = priv_to_devlink(mlxsw_core); 1456 1457 if (!reload) 1458 devlink_reload_disable(devlink); 1459 if (devlink_is_reload_failed(devlink)) { 1460 if (!reload) 1461 /* Only the parts that were not de-initialized in the 1462 * failed reload attempt need to be de-initialized. 1463 */ 1464 goto reload_fail_deinit; 1465 else 1466 return; 1467 } 1468 1469 if (mlxsw_core->driver->params_unregister) 1470 devlink_params_unpublish(devlink); 1471 mlxsw_thermal_fini(mlxsw_core->thermal); 1472 mlxsw_hwmon_fini(mlxsw_core->hwmon); 1473 if (mlxsw_core->driver->fini) 1474 mlxsw_core->driver->fini(mlxsw_core); 1475 if (mlxsw_core->driver->params_unregister && !reload) 1476 mlxsw_core->driver->params_unregister(mlxsw_core); 1477 if (!reload) 1478 devlink_unregister(devlink); 1479 mlxsw_emad_fini(mlxsw_core); 1480 kfree(mlxsw_core->lag.mapping); 1481 mlxsw_ports_fini(mlxsw_core); 1482 if (!reload) 1483 devlink_resources_unregister(devlink, NULL); 1484 mlxsw_core->bus->fini(mlxsw_core->bus_priv); 1485 1486 return; 1487 1488 reload_fail_deinit: 1489 if (mlxsw_core->driver->params_unregister) 1490 mlxsw_core->driver->params_unregister(mlxsw_core); 1491 devlink_unregister(devlink); 1492 devlink_resources_unregister(devlink, NULL); 1493 devlink_free(devlink); 1494 } 1495 EXPORT_SYMBOL(mlxsw_core_bus_device_unregister); 1496 1497 bool mlxsw_core_skb_transmit_busy(struct mlxsw_core *mlxsw_core, 1498 const struct mlxsw_tx_info *tx_info) 1499 { 1500 return mlxsw_core->bus->skb_transmit_busy(mlxsw_core->bus_priv, 1501 tx_info); 1502 } 1503 EXPORT_SYMBOL(mlxsw_core_skb_transmit_busy); 1504 1505 int mlxsw_core_skb_transmit(struct mlxsw_core *mlxsw_core, struct sk_buff *skb, 1506 const struct mlxsw_tx_info *tx_info) 1507 { 1508 return mlxsw_core->bus->skb_transmit(mlxsw_core->bus_priv, skb, 1509 tx_info); 1510 } 1511 EXPORT_SYMBOL(mlxsw_core_skb_transmit); 1512 1513 void mlxsw_core_ptp_transmitted(struct mlxsw_core *mlxsw_core, 1514 struct sk_buff *skb, u8 local_port) 1515 { 1516 if (mlxsw_core->driver->ptp_transmitted) 1517 mlxsw_core->driver->ptp_transmitted(mlxsw_core, skb, 1518 local_port); 1519 } 1520 EXPORT_SYMBOL(mlxsw_core_ptp_transmitted); 1521 1522 static bool __is_rx_listener_equal(const struct mlxsw_rx_listener *rxl_a, 1523 const struct mlxsw_rx_listener *rxl_b) 1524 { 1525 return (rxl_a->func == rxl_b->func && 1526 rxl_a->local_port == rxl_b->local_port && 1527 rxl_a->trap_id == rxl_b->trap_id); 1528 } 1529 1530 static struct mlxsw_rx_listener_item * 1531 __find_rx_listener_item(struct mlxsw_core *mlxsw_core, 1532 const struct mlxsw_rx_listener *rxl) 1533 { 1534 struct mlxsw_rx_listener_item *rxl_item; 1535 1536 list_for_each_entry(rxl_item, &mlxsw_core->rx_listener_list, list) { 1537 if (__is_rx_listener_equal(&rxl_item->rxl, rxl)) 1538 return rxl_item; 1539 } 1540 return NULL; 1541 } 1542 1543 int mlxsw_core_rx_listener_register(struct mlxsw_core *mlxsw_core, 1544 const struct mlxsw_rx_listener *rxl, 1545 void *priv, bool enabled) 1546 { 1547 struct mlxsw_rx_listener_item *rxl_item; 1548 1549 rxl_item = __find_rx_listener_item(mlxsw_core, rxl); 1550 if (rxl_item) 1551 return -EEXIST; 1552 rxl_item = kmalloc(sizeof(*rxl_item), GFP_KERNEL); 1553 if (!rxl_item) 1554 return -ENOMEM; 1555 rxl_item->rxl = *rxl; 1556 rxl_item->priv = priv; 1557 rxl_item->enabled = enabled; 1558 1559 list_add_rcu(&rxl_item->list, &mlxsw_core->rx_listener_list); 1560 return 0; 1561 } 1562 EXPORT_SYMBOL(mlxsw_core_rx_listener_register); 1563 1564 void mlxsw_core_rx_listener_unregister(struct mlxsw_core *mlxsw_core, 1565 const struct mlxsw_rx_listener *rxl) 1566 { 1567 struct mlxsw_rx_listener_item *rxl_item; 1568 1569 rxl_item = __find_rx_listener_item(mlxsw_core, rxl); 1570 if (!rxl_item) 1571 return; 1572 list_del_rcu(&rxl_item->list); 1573 synchronize_rcu(); 1574 kfree(rxl_item); 1575 } 1576 EXPORT_SYMBOL(mlxsw_core_rx_listener_unregister); 1577 1578 static void 1579 mlxsw_core_rx_listener_state_set(struct mlxsw_core *mlxsw_core, 1580 const struct mlxsw_rx_listener *rxl, 1581 bool enabled) 1582 { 1583 struct mlxsw_rx_listener_item *rxl_item; 1584 1585 rxl_item = __find_rx_listener_item(mlxsw_core, rxl); 1586 if (WARN_ON(!rxl_item)) 1587 return; 1588 rxl_item->enabled = enabled; 1589 } 1590 1591 static void mlxsw_core_event_listener_func(struct sk_buff *skb, u8 local_port, 1592 void *priv) 1593 { 1594 struct mlxsw_event_listener_item *event_listener_item = priv; 1595 struct mlxsw_reg_info reg; 1596 char *payload; 1597 char *reg_tlv; 1598 char *op_tlv; 1599 1600 mlxsw_emad_tlv_parse(skb); 1601 op_tlv = mlxsw_emad_op_tlv(skb); 1602 reg_tlv = mlxsw_emad_reg_tlv(skb); 1603 1604 reg.id = mlxsw_emad_op_tlv_register_id_get(op_tlv); 1605 reg.len = (mlxsw_emad_reg_tlv_len_get(reg_tlv) - 1) * sizeof(u32); 1606 payload = mlxsw_emad_reg_payload(reg_tlv); 1607 event_listener_item->el.func(®, payload, event_listener_item->priv); 1608 dev_kfree_skb(skb); 1609 } 1610 1611 static bool __is_event_listener_equal(const struct mlxsw_event_listener *el_a, 1612 const struct mlxsw_event_listener *el_b) 1613 { 1614 return (el_a->func == el_b->func && 1615 el_a->trap_id == el_b->trap_id); 1616 } 1617 1618 static struct mlxsw_event_listener_item * 1619 __find_event_listener_item(struct mlxsw_core *mlxsw_core, 1620 const struct mlxsw_event_listener *el) 1621 { 1622 struct mlxsw_event_listener_item *el_item; 1623 1624 list_for_each_entry(el_item, &mlxsw_core->event_listener_list, list) { 1625 if (__is_event_listener_equal(&el_item->el, el)) 1626 return el_item; 1627 } 1628 return NULL; 1629 } 1630 1631 int mlxsw_core_event_listener_register(struct mlxsw_core *mlxsw_core, 1632 const struct mlxsw_event_listener *el, 1633 void *priv) 1634 { 1635 int err; 1636 struct mlxsw_event_listener_item *el_item; 1637 const struct mlxsw_rx_listener rxl = { 1638 .func = mlxsw_core_event_listener_func, 1639 .local_port = MLXSW_PORT_DONT_CARE, 1640 .trap_id = el->trap_id, 1641 }; 1642 1643 el_item = __find_event_listener_item(mlxsw_core, el); 1644 if (el_item) 1645 return -EEXIST; 1646 el_item = kmalloc(sizeof(*el_item), GFP_KERNEL); 1647 if (!el_item) 1648 return -ENOMEM; 1649 el_item->el = *el; 1650 el_item->priv = priv; 1651 1652 err = mlxsw_core_rx_listener_register(mlxsw_core, &rxl, el_item, true); 1653 if (err) 1654 goto err_rx_listener_register; 1655 1656 /* No reason to save item if we did not manage to register an RX 1657 * listener for it. 1658 */ 1659 list_add_rcu(&el_item->list, &mlxsw_core->event_listener_list); 1660 1661 return 0; 1662 1663 err_rx_listener_register: 1664 kfree(el_item); 1665 return err; 1666 } 1667 EXPORT_SYMBOL(mlxsw_core_event_listener_register); 1668 1669 void mlxsw_core_event_listener_unregister(struct mlxsw_core *mlxsw_core, 1670 const struct mlxsw_event_listener *el) 1671 { 1672 struct mlxsw_event_listener_item *el_item; 1673 const struct mlxsw_rx_listener rxl = { 1674 .func = mlxsw_core_event_listener_func, 1675 .local_port = MLXSW_PORT_DONT_CARE, 1676 .trap_id = el->trap_id, 1677 }; 1678 1679 el_item = __find_event_listener_item(mlxsw_core, el); 1680 if (!el_item) 1681 return; 1682 mlxsw_core_rx_listener_unregister(mlxsw_core, &rxl); 1683 list_del(&el_item->list); 1684 kfree(el_item); 1685 } 1686 EXPORT_SYMBOL(mlxsw_core_event_listener_unregister); 1687 1688 static int mlxsw_core_listener_register(struct mlxsw_core *mlxsw_core, 1689 const struct mlxsw_listener *listener, 1690 void *priv, bool enabled) 1691 { 1692 if (listener->is_event) { 1693 WARN_ON(!enabled); 1694 return mlxsw_core_event_listener_register(mlxsw_core, 1695 &listener->event_listener, 1696 priv); 1697 } else { 1698 return mlxsw_core_rx_listener_register(mlxsw_core, 1699 &listener->rx_listener, 1700 priv, enabled); 1701 } 1702 } 1703 1704 static void mlxsw_core_listener_unregister(struct mlxsw_core *mlxsw_core, 1705 const struct mlxsw_listener *listener, 1706 void *priv) 1707 { 1708 if (listener->is_event) 1709 mlxsw_core_event_listener_unregister(mlxsw_core, 1710 &listener->event_listener); 1711 else 1712 mlxsw_core_rx_listener_unregister(mlxsw_core, 1713 &listener->rx_listener); 1714 } 1715 1716 int mlxsw_core_trap_register(struct mlxsw_core *mlxsw_core, 1717 const struct mlxsw_listener *listener, void *priv) 1718 { 1719 enum mlxsw_reg_htgt_trap_group trap_group; 1720 enum mlxsw_reg_hpkt_action action; 1721 char hpkt_pl[MLXSW_REG_HPKT_LEN]; 1722 int err; 1723 1724 err = mlxsw_core_listener_register(mlxsw_core, listener, priv, 1725 listener->enabled_on_register); 1726 if (err) 1727 return err; 1728 1729 action = listener->enabled_on_register ? listener->en_action : 1730 listener->dis_action; 1731 trap_group = listener->enabled_on_register ? listener->en_trap_group : 1732 listener->dis_trap_group; 1733 mlxsw_reg_hpkt_pack(hpkt_pl, action, listener->trap_id, 1734 trap_group, listener->is_ctrl); 1735 err = mlxsw_reg_write(mlxsw_core, MLXSW_REG(hpkt), hpkt_pl); 1736 if (err) 1737 goto err_trap_set; 1738 1739 return 0; 1740 1741 err_trap_set: 1742 mlxsw_core_listener_unregister(mlxsw_core, listener, priv); 1743 return err; 1744 } 1745 EXPORT_SYMBOL(mlxsw_core_trap_register); 1746 1747 void mlxsw_core_trap_unregister(struct mlxsw_core *mlxsw_core, 1748 const struct mlxsw_listener *listener, 1749 void *priv) 1750 { 1751 char hpkt_pl[MLXSW_REG_HPKT_LEN]; 1752 1753 if (!listener->is_event) { 1754 mlxsw_reg_hpkt_pack(hpkt_pl, listener->dis_action, 1755 listener->trap_id, listener->dis_trap_group, 1756 listener->is_ctrl); 1757 mlxsw_reg_write(mlxsw_core, MLXSW_REG(hpkt), hpkt_pl); 1758 } 1759 1760 mlxsw_core_listener_unregister(mlxsw_core, listener, priv); 1761 } 1762 EXPORT_SYMBOL(mlxsw_core_trap_unregister); 1763 1764 int mlxsw_core_trap_state_set(struct mlxsw_core *mlxsw_core, 1765 const struct mlxsw_listener *listener, 1766 bool enabled) 1767 { 1768 enum mlxsw_reg_htgt_trap_group trap_group; 1769 enum mlxsw_reg_hpkt_action action; 1770 char hpkt_pl[MLXSW_REG_HPKT_LEN]; 1771 int err; 1772 1773 /* Not supported for event listener */ 1774 if (WARN_ON(listener->is_event)) 1775 return -EINVAL; 1776 1777 action = enabled ? listener->en_action : listener->dis_action; 1778 trap_group = enabled ? listener->en_trap_group : 1779 listener->dis_trap_group; 1780 mlxsw_reg_hpkt_pack(hpkt_pl, action, listener->trap_id, 1781 trap_group, listener->is_ctrl); 1782 err = mlxsw_reg_write(mlxsw_core, MLXSW_REG(hpkt), hpkt_pl); 1783 if (err) 1784 return err; 1785 1786 mlxsw_core_rx_listener_state_set(mlxsw_core, &listener->rx_listener, 1787 enabled); 1788 return 0; 1789 } 1790 EXPORT_SYMBOL(mlxsw_core_trap_state_set); 1791 1792 static u64 mlxsw_core_tid_get(struct mlxsw_core *mlxsw_core) 1793 { 1794 return atomic64_inc_return(&mlxsw_core->emad.tid); 1795 } 1796 1797 static int mlxsw_core_reg_access_emad(struct mlxsw_core *mlxsw_core, 1798 const struct mlxsw_reg_info *reg, 1799 char *payload, 1800 enum mlxsw_core_reg_access_type type, 1801 struct list_head *bulk_list, 1802 mlxsw_reg_trans_cb_t *cb, 1803 unsigned long cb_priv) 1804 { 1805 u64 tid = mlxsw_core_tid_get(mlxsw_core); 1806 struct mlxsw_reg_trans *trans; 1807 int err; 1808 1809 trans = kzalloc(sizeof(*trans), GFP_KERNEL); 1810 if (!trans) 1811 return -ENOMEM; 1812 1813 err = mlxsw_emad_reg_access(mlxsw_core, reg, payload, type, trans, 1814 bulk_list, cb, cb_priv, tid); 1815 if (err) { 1816 kfree(trans); 1817 return err; 1818 } 1819 return 0; 1820 } 1821 1822 int mlxsw_reg_trans_query(struct mlxsw_core *mlxsw_core, 1823 const struct mlxsw_reg_info *reg, char *payload, 1824 struct list_head *bulk_list, 1825 mlxsw_reg_trans_cb_t *cb, unsigned long cb_priv) 1826 { 1827 return mlxsw_core_reg_access_emad(mlxsw_core, reg, payload, 1828 MLXSW_CORE_REG_ACCESS_TYPE_QUERY, 1829 bulk_list, cb, cb_priv); 1830 } 1831 EXPORT_SYMBOL(mlxsw_reg_trans_query); 1832 1833 int mlxsw_reg_trans_write(struct mlxsw_core *mlxsw_core, 1834 const struct mlxsw_reg_info *reg, char *payload, 1835 struct list_head *bulk_list, 1836 mlxsw_reg_trans_cb_t *cb, unsigned long cb_priv) 1837 { 1838 return mlxsw_core_reg_access_emad(mlxsw_core, reg, payload, 1839 MLXSW_CORE_REG_ACCESS_TYPE_WRITE, 1840 bulk_list, cb, cb_priv); 1841 } 1842 EXPORT_SYMBOL(mlxsw_reg_trans_write); 1843 1844 #define MLXSW_REG_TRANS_ERR_STRING_SIZE 256 1845 1846 static int mlxsw_reg_trans_wait(struct mlxsw_reg_trans *trans) 1847 { 1848 char err_string[MLXSW_REG_TRANS_ERR_STRING_SIZE]; 1849 struct mlxsw_core *mlxsw_core = trans->core; 1850 int err; 1851 1852 wait_for_completion(&trans->completion); 1853 cancel_delayed_work_sync(&trans->timeout_dw); 1854 err = trans->err; 1855 1856 if (trans->retries) 1857 dev_warn(mlxsw_core->bus_info->dev, "EMAD retries (%d/%d) (tid=%llx)\n", 1858 trans->retries, MLXSW_EMAD_MAX_RETRY, trans->tid); 1859 if (err) { 1860 dev_err(mlxsw_core->bus_info->dev, "EMAD reg access failed (tid=%llx,reg_id=%x(%s),type=%s,status=%x(%s))\n", 1861 trans->tid, trans->reg->id, 1862 mlxsw_reg_id_str(trans->reg->id), 1863 mlxsw_core_reg_access_type_str(trans->type), 1864 trans->emad_status, 1865 mlxsw_emad_op_tlv_status_str(trans->emad_status)); 1866 1867 snprintf(err_string, MLXSW_REG_TRANS_ERR_STRING_SIZE, 1868 "(tid=%llx,reg_id=%x(%s)) %s (%s)\n", trans->tid, 1869 trans->reg->id, mlxsw_reg_id_str(trans->reg->id), 1870 mlxsw_emad_op_tlv_status_str(trans->emad_status), 1871 trans->emad_err_string ? trans->emad_err_string : ""); 1872 1873 trace_devlink_hwerr(priv_to_devlink(mlxsw_core), 1874 trans->emad_status, err_string); 1875 1876 kfree(trans->emad_err_string); 1877 } 1878 1879 list_del(&trans->bulk_list); 1880 kfree_rcu(trans, rcu); 1881 return err; 1882 } 1883 1884 int mlxsw_reg_trans_bulk_wait(struct list_head *bulk_list) 1885 { 1886 struct mlxsw_reg_trans *trans; 1887 struct mlxsw_reg_trans *tmp; 1888 int sum_err = 0; 1889 int err; 1890 1891 list_for_each_entry_safe(trans, tmp, bulk_list, bulk_list) { 1892 err = mlxsw_reg_trans_wait(trans); 1893 if (err && sum_err == 0) 1894 sum_err = err; /* first error to be returned */ 1895 } 1896 return sum_err; 1897 } 1898 EXPORT_SYMBOL(mlxsw_reg_trans_bulk_wait); 1899 1900 static int mlxsw_core_reg_access_cmd(struct mlxsw_core *mlxsw_core, 1901 const struct mlxsw_reg_info *reg, 1902 char *payload, 1903 enum mlxsw_core_reg_access_type type) 1904 { 1905 enum mlxsw_emad_op_tlv_status status; 1906 int err, n_retry; 1907 bool reset_ok; 1908 char *in_mbox, *out_mbox, *tmp; 1909 1910 dev_dbg(mlxsw_core->bus_info->dev, "Reg cmd access (reg_id=%x(%s),type=%s)\n", 1911 reg->id, mlxsw_reg_id_str(reg->id), 1912 mlxsw_core_reg_access_type_str(type)); 1913 1914 in_mbox = mlxsw_cmd_mbox_alloc(); 1915 if (!in_mbox) 1916 return -ENOMEM; 1917 1918 out_mbox = mlxsw_cmd_mbox_alloc(); 1919 if (!out_mbox) { 1920 err = -ENOMEM; 1921 goto free_in_mbox; 1922 } 1923 1924 mlxsw_emad_pack_op_tlv(in_mbox, reg, type, 1925 mlxsw_core_tid_get(mlxsw_core)); 1926 tmp = in_mbox + MLXSW_EMAD_OP_TLV_LEN * sizeof(u32); 1927 mlxsw_emad_pack_reg_tlv(tmp, reg, payload); 1928 1929 /* There is a special treatment needed for MRSR (reset) register. 1930 * The command interface will return error after the command 1931 * is executed, so tell the lower layer to expect it 1932 * and cope accordingly. 1933 */ 1934 reset_ok = reg->id == MLXSW_REG_MRSR_ID; 1935 1936 n_retry = 0; 1937 retry: 1938 err = mlxsw_cmd_access_reg(mlxsw_core, reset_ok, in_mbox, out_mbox); 1939 if (!err) { 1940 err = mlxsw_emad_process_status(out_mbox, &status); 1941 if (err) { 1942 if (err == -EAGAIN && n_retry++ < MLXSW_EMAD_MAX_RETRY) 1943 goto retry; 1944 dev_err(mlxsw_core->bus_info->dev, "Reg cmd access status failed (status=%x(%s))\n", 1945 status, mlxsw_emad_op_tlv_status_str(status)); 1946 } 1947 } 1948 1949 if (!err) 1950 memcpy(payload, mlxsw_emad_reg_payload_cmd(out_mbox), 1951 reg->len); 1952 1953 mlxsw_cmd_mbox_free(out_mbox); 1954 free_in_mbox: 1955 mlxsw_cmd_mbox_free(in_mbox); 1956 if (err) 1957 dev_err(mlxsw_core->bus_info->dev, "Reg cmd access failed (reg_id=%x(%s),type=%s)\n", 1958 reg->id, mlxsw_reg_id_str(reg->id), 1959 mlxsw_core_reg_access_type_str(type)); 1960 return err; 1961 } 1962 1963 static void mlxsw_core_reg_access_cb(struct mlxsw_core *mlxsw_core, 1964 char *payload, size_t payload_len, 1965 unsigned long cb_priv) 1966 { 1967 char *orig_payload = (char *) cb_priv; 1968 1969 memcpy(orig_payload, payload, payload_len); 1970 } 1971 1972 static int mlxsw_core_reg_access(struct mlxsw_core *mlxsw_core, 1973 const struct mlxsw_reg_info *reg, 1974 char *payload, 1975 enum mlxsw_core_reg_access_type type) 1976 { 1977 LIST_HEAD(bulk_list); 1978 int err; 1979 1980 /* During initialization EMAD interface is not available to us, 1981 * so we default to command interface. We switch to EMAD interface 1982 * after setting the appropriate traps. 1983 */ 1984 if (!mlxsw_core->emad.use_emad) 1985 return mlxsw_core_reg_access_cmd(mlxsw_core, reg, 1986 payload, type); 1987 1988 err = mlxsw_core_reg_access_emad(mlxsw_core, reg, 1989 payload, type, &bulk_list, 1990 mlxsw_core_reg_access_cb, 1991 (unsigned long) payload); 1992 if (err) 1993 return err; 1994 return mlxsw_reg_trans_bulk_wait(&bulk_list); 1995 } 1996 1997 int mlxsw_reg_query(struct mlxsw_core *mlxsw_core, 1998 const struct mlxsw_reg_info *reg, char *payload) 1999 { 2000 return mlxsw_core_reg_access(mlxsw_core, reg, payload, 2001 MLXSW_CORE_REG_ACCESS_TYPE_QUERY); 2002 } 2003 EXPORT_SYMBOL(mlxsw_reg_query); 2004 2005 int mlxsw_reg_write(struct mlxsw_core *mlxsw_core, 2006 const struct mlxsw_reg_info *reg, char *payload) 2007 { 2008 return mlxsw_core_reg_access(mlxsw_core, reg, payload, 2009 MLXSW_CORE_REG_ACCESS_TYPE_WRITE); 2010 } 2011 EXPORT_SYMBOL(mlxsw_reg_write); 2012 2013 void mlxsw_core_skb_receive(struct mlxsw_core *mlxsw_core, struct sk_buff *skb, 2014 struct mlxsw_rx_info *rx_info) 2015 { 2016 struct mlxsw_rx_listener_item *rxl_item; 2017 const struct mlxsw_rx_listener *rxl; 2018 u8 local_port; 2019 bool found = false; 2020 2021 if (rx_info->is_lag) { 2022 dev_dbg_ratelimited(mlxsw_core->bus_info->dev, "%s: lag_id = %d, lag_port_index = 0x%x\n", 2023 __func__, rx_info->u.lag_id, 2024 rx_info->trap_id); 2025 /* Upper layer does not care if the skb came from LAG or not, 2026 * so just get the local_port for the lag port and push it up. 2027 */ 2028 local_port = mlxsw_core_lag_mapping_get(mlxsw_core, 2029 rx_info->u.lag_id, 2030 rx_info->lag_port_index); 2031 } else { 2032 local_port = rx_info->u.sys_port; 2033 } 2034 2035 dev_dbg_ratelimited(mlxsw_core->bus_info->dev, "%s: local_port = %d, trap_id = 0x%x\n", 2036 __func__, local_port, rx_info->trap_id); 2037 2038 if ((rx_info->trap_id >= MLXSW_TRAP_ID_MAX) || 2039 (local_port >= mlxsw_core->max_ports)) 2040 goto drop; 2041 2042 rcu_read_lock(); 2043 list_for_each_entry_rcu(rxl_item, &mlxsw_core->rx_listener_list, list) { 2044 rxl = &rxl_item->rxl; 2045 if ((rxl->local_port == MLXSW_PORT_DONT_CARE || 2046 rxl->local_port == local_port) && 2047 rxl->trap_id == rx_info->trap_id) { 2048 if (rxl_item->enabled) 2049 found = true; 2050 break; 2051 } 2052 } 2053 rcu_read_unlock(); 2054 if (!found) 2055 goto drop; 2056 2057 rxl->func(skb, local_port, rxl_item->priv); 2058 return; 2059 2060 drop: 2061 dev_kfree_skb(skb); 2062 } 2063 EXPORT_SYMBOL(mlxsw_core_skb_receive); 2064 2065 static int mlxsw_core_lag_mapping_index(struct mlxsw_core *mlxsw_core, 2066 u16 lag_id, u8 port_index) 2067 { 2068 return MLXSW_CORE_RES_GET(mlxsw_core, MAX_LAG_MEMBERS) * lag_id + 2069 port_index; 2070 } 2071 2072 void mlxsw_core_lag_mapping_set(struct mlxsw_core *mlxsw_core, 2073 u16 lag_id, u8 port_index, u8 local_port) 2074 { 2075 int index = mlxsw_core_lag_mapping_index(mlxsw_core, 2076 lag_id, port_index); 2077 2078 mlxsw_core->lag.mapping[index] = local_port; 2079 } 2080 EXPORT_SYMBOL(mlxsw_core_lag_mapping_set); 2081 2082 u8 mlxsw_core_lag_mapping_get(struct mlxsw_core *mlxsw_core, 2083 u16 lag_id, u8 port_index) 2084 { 2085 int index = mlxsw_core_lag_mapping_index(mlxsw_core, 2086 lag_id, port_index); 2087 2088 return mlxsw_core->lag.mapping[index]; 2089 } 2090 EXPORT_SYMBOL(mlxsw_core_lag_mapping_get); 2091 2092 void mlxsw_core_lag_mapping_clear(struct mlxsw_core *mlxsw_core, 2093 u16 lag_id, u8 local_port) 2094 { 2095 int i; 2096 2097 for (i = 0; i < MLXSW_CORE_RES_GET(mlxsw_core, MAX_LAG_MEMBERS); i++) { 2098 int index = mlxsw_core_lag_mapping_index(mlxsw_core, 2099 lag_id, i); 2100 2101 if (mlxsw_core->lag.mapping[index] == local_port) 2102 mlxsw_core->lag.mapping[index] = 0; 2103 } 2104 } 2105 EXPORT_SYMBOL(mlxsw_core_lag_mapping_clear); 2106 2107 bool mlxsw_core_res_valid(struct mlxsw_core *mlxsw_core, 2108 enum mlxsw_res_id res_id) 2109 { 2110 return mlxsw_res_valid(&mlxsw_core->res, res_id); 2111 } 2112 EXPORT_SYMBOL(mlxsw_core_res_valid); 2113 2114 u64 mlxsw_core_res_get(struct mlxsw_core *mlxsw_core, 2115 enum mlxsw_res_id res_id) 2116 { 2117 return mlxsw_res_get(&mlxsw_core->res, res_id); 2118 } 2119 EXPORT_SYMBOL(mlxsw_core_res_get); 2120 2121 static int __mlxsw_core_port_init(struct mlxsw_core *mlxsw_core, u8 local_port, 2122 enum devlink_port_flavour flavour, 2123 u32 port_number, bool split, 2124 u32 split_port_subnumber, 2125 const unsigned char *switch_id, 2126 unsigned char switch_id_len) 2127 { 2128 struct devlink *devlink = priv_to_devlink(mlxsw_core); 2129 struct mlxsw_core_port *mlxsw_core_port = 2130 &mlxsw_core->ports[local_port]; 2131 struct devlink_port *devlink_port = &mlxsw_core_port->devlink_port; 2132 int err; 2133 2134 mlxsw_core_port->local_port = local_port; 2135 devlink_port_attrs_set(devlink_port, flavour, port_number, 2136 split, split_port_subnumber, 2137 switch_id, switch_id_len); 2138 err = devlink_port_register(devlink, devlink_port, local_port); 2139 if (err) 2140 memset(mlxsw_core_port, 0, sizeof(*mlxsw_core_port)); 2141 return err; 2142 } 2143 2144 static void __mlxsw_core_port_fini(struct mlxsw_core *mlxsw_core, u8 local_port) 2145 { 2146 struct mlxsw_core_port *mlxsw_core_port = 2147 &mlxsw_core->ports[local_port]; 2148 struct devlink_port *devlink_port = &mlxsw_core_port->devlink_port; 2149 2150 devlink_port_unregister(devlink_port); 2151 memset(mlxsw_core_port, 0, sizeof(*mlxsw_core_port)); 2152 } 2153 2154 int mlxsw_core_port_init(struct mlxsw_core *mlxsw_core, u8 local_port, 2155 u32 port_number, bool split, 2156 u32 split_port_subnumber, 2157 const unsigned char *switch_id, 2158 unsigned char switch_id_len) 2159 { 2160 return __mlxsw_core_port_init(mlxsw_core, local_port, 2161 DEVLINK_PORT_FLAVOUR_PHYSICAL, 2162 port_number, split, split_port_subnumber, 2163 switch_id, switch_id_len); 2164 } 2165 EXPORT_SYMBOL(mlxsw_core_port_init); 2166 2167 void mlxsw_core_port_fini(struct mlxsw_core *mlxsw_core, u8 local_port) 2168 { 2169 __mlxsw_core_port_fini(mlxsw_core, local_port); 2170 } 2171 EXPORT_SYMBOL(mlxsw_core_port_fini); 2172 2173 int mlxsw_core_cpu_port_init(struct mlxsw_core *mlxsw_core, 2174 void *port_driver_priv, 2175 const unsigned char *switch_id, 2176 unsigned char switch_id_len) 2177 { 2178 struct mlxsw_core_port *mlxsw_core_port = 2179 &mlxsw_core->ports[MLXSW_PORT_CPU_PORT]; 2180 int err; 2181 2182 err = __mlxsw_core_port_init(mlxsw_core, MLXSW_PORT_CPU_PORT, 2183 DEVLINK_PORT_FLAVOUR_CPU, 2184 0, false, 0, 2185 switch_id, switch_id_len); 2186 if (err) 2187 return err; 2188 2189 mlxsw_core_port->port_driver_priv = port_driver_priv; 2190 return 0; 2191 } 2192 EXPORT_SYMBOL(mlxsw_core_cpu_port_init); 2193 2194 void mlxsw_core_cpu_port_fini(struct mlxsw_core *mlxsw_core) 2195 { 2196 __mlxsw_core_port_fini(mlxsw_core, MLXSW_PORT_CPU_PORT); 2197 } 2198 EXPORT_SYMBOL(mlxsw_core_cpu_port_fini); 2199 2200 void mlxsw_core_port_eth_set(struct mlxsw_core *mlxsw_core, u8 local_port, 2201 void *port_driver_priv, struct net_device *dev) 2202 { 2203 struct mlxsw_core_port *mlxsw_core_port = 2204 &mlxsw_core->ports[local_port]; 2205 struct devlink_port *devlink_port = &mlxsw_core_port->devlink_port; 2206 2207 mlxsw_core_port->port_driver_priv = port_driver_priv; 2208 devlink_port_type_eth_set(devlink_port, dev); 2209 } 2210 EXPORT_SYMBOL(mlxsw_core_port_eth_set); 2211 2212 void mlxsw_core_port_ib_set(struct mlxsw_core *mlxsw_core, u8 local_port, 2213 void *port_driver_priv) 2214 { 2215 struct mlxsw_core_port *mlxsw_core_port = 2216 &mlxsw_core->ports[local_port]; 2217 struct devlink_port *devlink_port = &mlxsw_core_port->devlink_port; 2218 2219 mlxsw_core_port->port_driver_priv = port_driver_priv; 2220 devlink_port_type_ib_set(devlink_port, NULL); 2221 } 2222 EXPORT_SYMBOL(mlxsw_core_port_ib_set); 2223 2224 void mlxsw_core_port_clear(struct mlxsw_core *mlxsw_core, u8 local_port, 2225 void *port_driver_priv) 2226 { 2227 struct mlxsw_core_port *mlxsw_core_port = 2228 &mlxsw_core->ports[local_port]; 2229 struct devlink_port *devlink_port = &mlxsw_core_port->devlink_port; 2230 2231 mlxsw_core_port->port_driver_priv = port_driver_priv; 2232 devlink_port_type_clear(devlink_port); 2233 } 2234 EXPORT_SYMBOL(mlxsw_core_port_clear); 2235 2236 enum devlink_port_type mlxsw_core_port_type_get(struct mlxsw_core *mlxsw_core, 2237 u8 local_port) 2238 { 2239 struct mlxsw_core_port *mlxsw_core_port = 2240 &mlxsw_core->ports[local_port]; 2241 struct devlink_port *devlink_port = &mlxsw_core_port->devlink_port; 2242 2243 return devlink_port->type; 2244 } 2245 EXPORT_SYMBOL(mlxsw_core_port_type_get); 2246 2247 2248 struct devlink_port * 2249 mlxsw_core_port_devlink_port_get(struct mlxsw_core *mlxsw_core, 2250 u8 local_port) 2251 { 2252 struct mlxsw_core_port *mlxsw_core_port = 2253 &mlxsw_core->ports[local_port]; 2254 struct devlink_port *devlink_port = &mlxsw_core_port->devlink_port; 2255 2256 return devlink_port; 2257 } 2258 EXPORT_SYMBOL(mlxsw_core_port_devlink_port_get); 2259 2260 int mlxsw_core_module_max_width(struct mlxsw_core *mlxsw_core, u8 module) 2261 { 2262 enum mlxsw_reg_pmtm_module_type module_type; 2263 char pmtm_pl[MLXSW_REG_PMTM_LEN]; 2264 int err; 2265 2266 mlxsw_reg_pmtm_pack(pmtm_pl, module); 2267 err = mlxsw_reg_query(mlxsw_core, MLXSW_REG(pmtm), pmtm_pl); 2268 if (err) 2269 return err; 2270 mlxsw_reg_pmtm_unpack(pmtm_pl, &module_type); 2271 2272 /* Here we need to get the module width according to the module type. */ 2273 2274 switch (module_type) { 2275 case MLXSW_REG_PMTM_MODULE_TYPE_C2C8X: /* fall through */ 2276 case MLXSW_REG_PMTM_MODULE_TYPE_QSFP_DD: /* fall through */ 2277 case MLXSW_REG_PMTM_MODULE_TYPE_OSFP: 2278 return 8; 2279 case MLXSW_REG_PMTM_MODULE_TYPE_C2C4X: /* fall through */ 2280 case MLXSW_REG_PMTM_MODULE_TYPE_BP_4X: /* fall through */ 2281 case MLXSW_REG_PMTM_MODULE_TYPE_QSFP: 2282 return 4; 2283 case MLXSW_REG_PMTM_MODULE_TYPE_C2C2X: /* fall through */ 2284 case MLXSW_REG_PMTM_MODULE_TYPE_BP_2X: /* fall through */ 2285 case MLXSW_REG_PMTM_MODULE_TYPE_SFP_DD: /* fall through */ 2286 case MLXSW_REG_PMTM_MODULE_TYPE_DSFP: 2287 return 2; 2288 case MLXSW_REG_PMTM_MODULE_TYPE_C2C1X: /* fall through */ 2289 case MLXSW_REG_PMTM_MODULE_TYPE_BP_1X: /* fall through */ 2290 case MLXSW_REG_PMTM_MODULE_TYPE_SFP: 2291 return 1; 2292 default: 2293 return -EINVAL; 2294 } 2295 } 2296 EXPORT_SYMBOL(mlxsw_core_module_max_width); 2297 2298 static void mlxsw_core_buf_dump_dbg(struct mlxsw_core *mlxsw_core, 2299 const char *buf, size_t size) 2300 { 2301 __be32 *m = (__be32 *) buf; 2302 int i; 2303 int count = size / sizeof(__be32); 2304 2305 for (i = count - 1; i >= 0; i--) 2306 if (m[i]) 2307 break; 2308 i++; 2309 count = i ? i : 1; 2310 for (i = 0; i < count; i += 4) 2311 dev_dbg(mlxsw_core->bus_info->dev, "%04x - %08x %08x %08x %08x\n", 2312 i * 4, be32_to_cpu(m[i]), be32_to_cpu(m[i + 1]), 2313 be32_to_cpu(m[i + 2]), be32_to_cpu(m[i + 3])); 2314 } 2315 2316 int mlxsw_cmd_exec(struct mlxsw_core *mlxsw_core, u16 opcode, u8 opcode_mod, 2317 u32 in_mod, bool out_mbox_direct, bool reset_ok, 2318 char *in_mbox, size_t in_mbox_size, 2319 char *out_mbox, size_t out_mbox_size) 2320 { 2321 u8 status; 2322 int err; 2323 2324 BUG_ON(in_mbox_size % sizeof(u32) || out_mbox_size % sizeof(u32)); 2325 if (!mlxsw_core->bus->cmd_exec) 2326 return -EOPNOTSUPP; 2327 2328 dev_dbg(mlxsw_core->bus_info->dev, "Cmd exec (opcode=%x(%s),opcode_mod=%x,in_mod=%x)\n", 2329 opcode, mlxsw_cmd_opcode_str(opcode), opcode_mod, in_mod); 2330 if (in_mbox) { 2331 dev_dbg(mlxsw_core->bus_info->dev, "Input mailbox:\n"); 2332 mlxsw_core_buf_dump_dbg(mlxsw_core, in_mbox, in_mbox_size); 2333 } 2334 2335 err = mlxsw_core->bus->cmd_exec(mlxsw_core->bus_priv, opcode, 2336 opcode_mod, in_mod, out_mbox_direct, 2337 in_mbox, in_mbox_size, 2338 out_mbox, out_mbox_size, &status); 2339 2340 if (!err && out_mbox) { 2341 dev_dbg(mlxsw_core->bus_info->dev, "Output mailbox:\n"); 2342 mlxsw_core_buf_dump_dbg(mlxsw_core, out_mbox, out_mbox_size); 2343 } 2344 2345 if (reset_ok && err == -EIO && 2346 status == MLXSW_CMD_STATUS_RUNNING_RESET) { 2347 err = 0; 2348 } else if (err == -EIO && status != MLXSW_CMD_STATUS_OK) { 2349 dev_err(mlxsw_core->bus_info->dev, "Cmd exec failed (opcode=%x(%s),opcode_mod=%x,in_mod=%x,status=%x(%s))\n", 2350 opcode, mlxsw_cmd_opcode_str(opcode), opcode_mod, 2351 in_mod, status, mlxsw_cmd_status_str(status)); 2352 } else if (err == -ETIMEDOUT) { 2353 dev_err(mlxsw_core->bus_info->dev, "Cmd exec timed-out (opcode=%x(%s),opcode_mod=%x,in_mod=%x)\n", 2354 opcode, mlxsw_cmd_opcode_str(opcode), opcode_mod, 2355 in_mod); 2356 } 2357 2358 return err; 2359 } 2360 EXPORT_SYMBOL(mlxsw_cmd_exec); 2361 2362 int mlxsw_core_schedule_dw(struct delayed_work *dwork, unsigned long delay) 2363 { 2364 return queue_delayed_work(mlxsw_wq, dwork, delay); 2365 } 2366 EXPORT_SYMBOL(mlxsw_core_schedule_dw); 2367 2368 bool mlxsw_core_schedule_work(struct work_struct *work) 2369 { 2370 return queue_work(mlxsw_owq, work); 2371 } 2372 EXPORT_SYMBOL(mlxsw_core_schedule_work); 2373 2374 void mlxsw_core_flush_owq(void) 2375 { 2376 flush_workqueue(mlxsw_owq); 2377 } 2378 EXPORT_SYMBOL(mlxsw_core_flush_owq); 2379 2380 int mlxsw_core_kvd_sizes_get(struct mlxsw_core *mlxsw_core, 2381 const struct mlxsw_config_profile *profile, 2382 u64 *p_single_size, u64 *p_double_size, 2383 u64 *p_linear_size) 2384 { 2385 struct mlxsw_driver *driver = mlxsw_core->driver; 2386 2387 if (!driver->kvd_sizes_get) 2388 return -EINVAL; 2389 2390 return driver->kvd_sizes_get(mlxsw_core, profile, 2391 p_single_size, p_double_size, 2392 p_linear_size); 2393 } 2394 EXPORT_SYMBOL(mlxsw_core_kvd_sizes_get); 2395 2396 void mlxsw_core_fw_flash_start(struct mlxsw_core *mlxsw_core) 2397 { 2398 mlxsw_core->fw_flash_in_progress = true; 2399 } 2400 EXPORT_SYMBOL(mlxsw_core_fw_flash_start); 2401 2402 void mlxsw_core_fw_flash_end(struct mlxsw_core *mlxsw_core) 2403 { 2404 mlxsw_core->fw_flash_in_progress = false; 2405 } 2406 EXPORT_SYMBOL(mlxsw_core_fw_flash_end); 2407 2408 int mlxsw_core_resources_query(struct mlxsw_core *mlxsw_core, char *mbox, 2409 struct mlxsw_res *res) 2410 { 2411 int index, i; 2412 u64 data; 2413 u16 id; 2414 int err; 2415 2416 if (!res) 2417 return 0; 2418 2419 mlxsw_cmd_mbox_zero(mbox); 2420 2421 for (index = 0; index < MLXSW_CMD_QUERY_RESOURCES_MAX_QUERIES; 2422 index++) { 2423 err = mlxsw_cmd_query_resources(mlxsw_core, mbox, index); 2424 if (err) 2425 return err; 2426 2427 for (i = 0; i < MLXSW_CMD_QUERY_RESOURCES_PER_QUERY; i++) { 2428 id = mlxsw_cmd_mbox_query_resource_id_get(mbox, i); 2429 data = mlxsw_cmd_mbox_query_resource_data_get(mbox, i); 2430 2431 if (id == MLXSW_CMD_QUERY_RESOURCES_TABLE_END_ID) 2432 return 0; 2433 2434 mlxsw_res_parse(res, id, data); 2435 } 2436 } 2437 2438 /* If after MLXSW_RESOURCES_QUERY_MAX_QUERIES we still didn't get 2439 * MLXSW_RESOURCES_TABLE_END_ID, something went bad in the FW. 2440 */ 2441 return -EIO; 2442 } 2443 EXPORT_SYMBOL(mlxsw_core_resources_query); 2444 2445 u32 mlxsw_core_read_frc_h(struct mlxsw_core *mlxsw_core) 2446 { 2447 return mlxsw_core->bus->read_frc_h(mlxsw_core->bus_priv); 2448 } 2449 EXPORT_SYMBOL(mlxsw_core_read_frc_h); 2450 2451 u32 mlxsw_core_read_frc_l(struct mlxsw_core *mlxsw_core) 2452 { 2453 return mlxsw_core->bus->read_frc_l(mlxsw_core->bus_priv); 2454 } 2455 EXPORT_SYMBOL(mlxsw_core_read_frc_l); 2456 2457 void mlxsw_core_emad_string_tlv_enable(struct mlxsw_core *mlxsw_core) 2458 { 2459 mlxsw_core->emad.enable_string_tlv = true; 2460 } 2461 EXPORT_SYMBOL(mlxsw_core_emad_string_tlv_enable); 2462 2463 static int __init mlxsw_core_module_init(void) 2464 { 2465 int err; 2466 2467 mlxsw_wq = alloc_workqueue(mlxsw_core_driver_name, 0, 0); 2468 if (!mlxsw_wq) 2469 return -ENOMEM; 2470 mlxsw_owq = alloc_ordered_workqueue("%s_ordered", 0, 2471 mlxsw_core_driver_name); 2472 if (!mlxsw_owq) { 2473 err = -ENOMEM; 2474 goto err_alloc_ordered_workqueue; 2475 } 2476 return 0; 2477 2478 err_alloc_ordered_workqueue: 2479 destroy_workqueue(mlxsw_wq); 2480 return err; 2481 } 2482 2483 static void __exit mlxsw_core_module_exit(void) 2484 { 2485 destroy_workqueue(mlxsw_owq); 2486 destroy_workqueue(mlxsw_wq); 2487 } 2488 2489 module_init(mlxsw_core_module_init); 2490 module_exit(mlxsw_core_module_exit); 2491 2492 MODULE_LICENSE("Dual BSD/GPL"); 2493 MODULE_AUTHOR("Jiri Pirko <jiri@mellanox.com>"); 2494 MODULE_DESCRIPTION("Mellanox switch device core driver"); 2495