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 goto err_trap_register; 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 err_trap_register: 726 destroy_workqueue(mlxsw_core->emad_wq); 727 return err; 728 } 729 730 static void mlxsw_emad_fini(struct mlxsw_core *mlxsw_core) 731 { 732 733 if (!(mlxsw_core->bus->features & MLXSW_BUS_F_TXRX)) 734 return; 735 736 mlxsw_core->emad.use_emad = false; 737 mlxsw_core_trap_unregister(mlxsw_core, &mlxsw_emad_rx_listener, 738 mlxsw_core); 739 destroy_workqueue(mlxsw_core->emad_wq); 740 } 741 742 static struct sk_buff *mlxsw_emad_alloc(const struct mlxsw_core *mlxsw_core, 743 u16 reg_len, bool enable_string_tlv) 744 { 745 struct sk_buff *skb; 746 u16 emad_len; 747 748 emad_len = (reg_len + sizeof(u32) + MLXSW_EMAD_ETH_HDR_LEN + 749 (MLXSW_EMAD_OP_TLV_LEN + MLXSW_EMAD_END_TLV_LEN) * 750 sizeof(u32) + mlxsw_core->driver->txhdr_len); 751 if (enable_string_tlv) 752 emad_len += MLXSW_EMAD_STRING_TLV_LEN * sizeof(u32); 753 if (emad_len > MLXSW_EMAD_MAX_FRAME_LEN) 754 return NULL; 755 756 skb = netdev_alloc_skb(NULL, emad_len); 757 if (!skb) 758 return NULL; 759 memset(skb->data, 0, emad_len); 760 skb_reserve(skb, emad_len); 761 762 return skb; 763 } 764 765 static int mlxsw_emad_reg_access(struct mlxsw_core *mlxsw_core, 766 const struct mlxsw_reg_info *reg, 767 char *payload, 768 enum mlxsw_core_reg_access_type type, 769 struct mlxsw_reg_trans *trans, 770 struct list_head *bulk_list, 771 mlxsw_reg_trans_cb_t *cb, 772 unsigned long cb_priv, u64 tid) 773 { 774 bool enable_string_tlv; 775 struct sk_buff *skb; 776 int err; 777 778 dev_dbg(mlxsw_core->bus_info->dev, "EMAD reg access (tid=%llx,reg_id=%x(%s),type=%s)\n", 779 tid, reg->id, mlxsw_reg_id_str(reg->id), 780 mlxsw_core_reg_access_type_str(type)); 781 782 /* Since this can be changed during emad_reg_access, read it once and 783 * use the value all the way. 784 */ 785 enable_string_tlv = mlxsw_core->emad.enable_string_tlv; 786 787 skb = mlxsw_emad_alloc(mlxsw_core, reg->len, enable_string_tlv); 788 if (!skb) 789 return -ENOMEM; 790 791 list_add_tail(&trans->bulk_list, bulk_list); 792 trans->core = mlxsw_core; 793 trans->tx_skb = skb; 794 trans->tx_info.local_port = MLXSW_PORT_CPU_PORT; 795 trans->tx_info.is_emad = true; 796 INIT_DELAYED_WORK(&trans->timeout_dw, mlxsw_emad_trans_timeout_work); 797 trans->tid = tid; 798 init_completion(&trans->completion); 799 trans->cb = cb; 800 trans->cb_priv = cb_priv; 801 trans->reg = reg; 802 trans->type = type; 803 804 mlxsw_emad_construct(skb, reg, payload, type, trans->tid, 805 enable_string_tlv); 806 mlxsw_core->driver->txhdr_construct(skb, &trans->tx_info); 807 808 spin_lock_bh(&mlxsw_core->emad.trans_list_lock); 809 list_add_tail_rcu(&trans->list, &mlxsw_core->emad.trans_list); 810 spin_unlock_bh(&mlxsw_core->emad.trans_list_lock); 811 err = mlxsw_emad_transmit(mlxsw_core, trans); 812 if (err) 813 goto err_out; 814 return 0; 815 816 err_out: 817 spin_lock_bh(&mlxsw_core->emad.trans_list_lock); 818 list_del_rcu(&trans->list); 819 spin_unlock_bh(&mlxsw_core->emad.trans_list_lock); 820 list_del(&trans->bulk_list); 821 dev_kfree_skb(trans->tx_skb); 822 return err; 823 } 824 825 /***************** 826 * Core functions 827 *****************/ 828 829 int mlxsw_core_driver_register(struct mlxsw_driver *mlxsw_driver) 830 { 831 spin_lock(&mlxsw_core_driver_list_lock); 832 list_add_tail(&mlxsw_driver->list, &mlxsw_core_driver_list); 833 spin_unlock(&mlxsw_core_driver_list_lock); 834 return 0; 835 } 836 EXPORT_SYMBOL(mlxsw_core_driver_register); 837 838 void mlxsw_core_driver_unregister(struct mlxsw_driver *mlxsw_driver) 839 { 840 spin_lock(&mlxsw_core_driver_list_lock); 841 list_del(&mlxsw_driver->list); 842 spin_unlock(&mlxsw_core_driver_list_lock); 843 } 844 EXPORT_SYMBOL(mlxsw_core_driver_unregister); 845 846 static struct mlxsw_driver *__driver_find(const char *kind) 847 { 848 struct mlxsw_driver *mlxsw_driver; 849 850 list_for_each_entry(mlxsw_driver, &mlxsw_core_driver_list, list) { 851 if (strcmp(mlxsw_driver->kind, kind) == 0) 852 return mlxsw_driver; 853 } 854 return NULL; 855 } 856 857 static struct mlxsw_driver *mlxsw_core_driver_get(const char *kind) 858 { 859 struct mlxsw_driver *mlxsw_driver; 860 861 spin_lock(&mlxsw_core_driver_list_lock); 862 mlxsw_driver = __driver_find(kind); 863 spin_unlock(&mlxsw_core_driver_list_lock); 864 return mlxsw_driver; 865 } 866 867 static int mlxsw_devlink_port_split(struct devlink *devlink, 868 unsigned int port_index, 869 unsigned int count, 870 struct netlink_ext_ack *extack) 871 { 872 struct mlxsw_core *mlxsw_core = devlink_priv(devlink); 873 874 if (port_index >= mlxsw_core->max_ports) { 875 NL_SET_ERR_MSG_MOD(extack, "Port index exceeds maximum number of ports"); 876 return -EINVAL; 877 } 878 if (!mlxsw_core->driver->port_split) 879 return -EOPNOTSUPP; 880 return mlxsw_core->driver->port_split(mlxsw_core, port_index, count, 881 extack); 882 } 883 884 static int mlxsw_devlink_port_unsplit(struct devlink *devlink, 885 unsigned int port_index, 886 struct netlink_ext_ack *extack) 887 { 888 struct mlxsw_core *mlxsw_core = devlink_priv(devlink); 889 890 if (port_index >= mlxsw_core->max_ports) { 891 NL_SET_ERR_MSG_MOD(extack, "Port index exceeds maximum number of ports"); 892 return -EINVAL; 893 } 894 if (!mlxsw_core->driver->port_unsplit) 895 return -EOPNOTSUPP; 896 return mlxsw_core->driver->port_unsplit(mlxsw_core, port_index, 897 extack); 898 } 899 900 static int 901 mlxsw_devlink_sb_pool_get(struct devlink *devlink, 902 unsigned int sb_index, u16 pool_index, 903 struct devlink_sb_pool_info *pool_info) 904 { 905 struct mlxsw_core *mlxsw_core = devlink_priv(devlink); 906 struct mlxsw_driver *mlxsw_driver = mlxsw_core->driver; 907 908 if (!mlxsw_driver->sb_pool_get) 909 return -EOPNOTSUPP; 910 return mlxsw_driver->sb_pool_get(mlxsw_core, sb_index, 911 pool_index, pool_info); 912 } 913 914 static int 915 mlxsw_devlink_sb_pool_set(struct devlink *devlink, 916 unsigned int sb_index, u16 pool_index, u32 size, 917 enum devlink_sb_threshold_type threshold_type, 918 struct netlink_ext_ack *extack) 919 { 920 struct mlxsw_core *mlxsw_core = devlink_priv(devlink); 921 struct mlxsw_driver *mlxsw_driver = mlxsw_core->driver; 922 923 if (!mlxsw_driver->sb_pool_set) 924 return -EOPNOTSUPP; 925 return mlxsw_driver->sb_pool_set(mlxsw_core, sb_index, 926 pool_index, size, threshold_type, 927 extack); 928 } 929 930 static void *__dl_port(struct devlink_port *devlink_port) 931 { 932 return container_of(devlink_port, struct mlxsw_core_port, devlink_port); 933 } 934 935 static int mlxsw_devlink_port_type_set(struct devlink_port *devlink_port, 936 enum devlink_port_type port_type) 937 { 938 struct mlxsw_core *mlxsw_core = devlink_priv(devlink_port->devlink); 939 struct mlxsw_driver *mlxsw_driver = mlxsw_core->driver; 940 struct mlxsw_core_port *mlxsw_core_port = __dl_port(devlink_port); 941 942 if (!mlxsw_driver->port_type_set) 943 return -EOPNOTSUPP; 944 945 return mlxsw_driver->port_type_set(mlxsw_core, 946 mlxsw_core_port->local_port, 947 port_type); 948 } 949 950 static int mlxsw_devlink_sb_port_pool_get(struct devlink_port *devlink_port, 951 unsigned int sb_index, u16 pool_index, 952 u32 *p_threshold) 953 { 954 struct mlxsw_core *mlxsw_core = devlink_priv(devlink_port->devlink); 955 struct mlxsw_driver *mlxsw_driver = mlxsw_core->driver; 956 struct mlxsw_core_port *mlxsw_core_port = __dl_port(devlink_port); 957 958 if (!mlxsw_driver->sb_port_pool_get || 959 !mlxsw_core_port_check(mlxsw_core_port)) 960 return -EOPNOTSUPP; 961 return mlxsw_driver->sb_port_pool_get(mlxsw_core_port, sb_index, 962 pool_index, p_threshold); 963 } 964 965 static int mlxsw_devlink_sb_port_pool_set(struct devlink_port *devlink_port, 966 unsigned int sb_index, u16 pool_index, 967 u32 threshold, 968 struct netlink_ext_ack *extack) 969 { 970 struct mlxsw_core *mlxsw_core = devlink_priv(devlink_port->devlink); 971 struct mlxsw_driver *mlxsw_driver = mlxsw_core->driver; 972 struct mlxsw_core_port *mlxsw_core_port = __dl_port(devlink_port); 973 974 if (!mlxsw_driver->sb_port_pool_set || 975 !mlxsw_core_port_check(mlxsw_core_port)) 976 return -EOPNOTSUPP; 977 return mlxsw_driver->sb_port_pool_set(mlxsw_core_port, sb_index, 978 pool_index, threshold, extack); 979 } 980 981 static int 982 mlxsw_devlink_sb_tc_pool_bind_get(struct devlink_port *devlink_port, 983 unsigned int sb_index, u16 tc_index, 984 enum devlink_sb_pool_type pool_type, 985 u16 *p_pool_index, u32 *p_threshold) 986 { 987 struct mlxsw_core *mlxsw_core = devlink_priv(devlink_port->devlink); 988 struct mlxsw_driver *mlxsw_driver = mlxsw_core->driver; 989 struct mlxsw_core_port *mlxsw_core_port = __dl_port(devlink_port); 990 991 if (!mlxsw_driver->sb_tc_pool_bind_get || 992 !mlxsw_core_port_check(mlxsw_core_port)) 993 return -EOPNOTSUPP; 994 return mlxsw_driver->sb_tc_pool_bind_get(mlxsw_core_port, sb_index, 995 tc_index, pool_type, 996 p_pool_index, p_threshold); 997 } 998 999 static int 1000 mlxsw_devlink_sb_tc_pool_bind_set(struct devlink_port *devlink_port, 1001 unsigned int sb_index, u16 tc_index, 1002 enum devlink_sb_pool_type pool_type, 1003 u16 pool_index, u32 threshold, 1004 struct netlink_ext_ack *extack) 1005 { 1006 struct mlxsw_core *mlxsw_core = devlink_priv(devlink_port->devlink); 1007 struct mlxsw_driver *mlxsw_driver = mlxsw_core->driver; 1008 struct mlxsw_core_port *mlxsw_core_port = __dl_port(devlink_port); 1009 1010 if (!mlxsw_driver->sb_tc_pool_bind_set || 1011 !mlxsw_core_port_check(mlxsw_core_port)) 1012 return -EOPNOTSUPP; 1013 return mlxsw_driver->sb_tc_pool_bind_set(mlxsw_core_port, sb_index, 1014 tc_index, pool_type, 1015 pool_index, threshold, extack); 1016 } 1017 1018 static int mlxsw_devlink_sb_occ_snapshot(struct devlink *devlink, 1019 unsigned int sb_index) 1020 { 1021 struct mlxsw_core *mlxsw_core = devlink_priv(devlink); 1022 struct mlxsw_driver *mlxsw_driver = mlxsw_core->driver; 1023 1024 if (!mlxsw_driver->sb_occ_snapshot) 1025 return -EOPNOTSUPP; 1026 return mlxsw_driver->sb_occ_snapshot(mlxsw_core, sb_index); 1027 } 1028 1029 static int mlxsw_devlink_sb_occ_max_clear(struct devlink *devlink, 1030 unsigned int sb_index) 1031 { 1032 struct mlxsw_core *mlxsw_core = devlink_priv(devlink); 1033 struct mlxsw_driver *mlxsw_driver = mlxsw_core->driver; 1034 1035 if (!mlxsw_driver->sb_occ_max_clear) 1036 return -EOPNOTSUPP; 1037 return mlxsw_driver->sb_occ_max_clear(mlxsw_core, sb_index); 1038 } 1039 1040 static int 1041 mlxsw_devlink_sb_occ_port_pool_get(struct devlink_port *devlink_port, 1042 unsigned int sb_index, u16 pool_index, 1043 u32 *p_cur, u32 *p_max) 1044 { 1045 struct mlxsw_core *mlxsw_core = devlink_priv(devlink_port->devlink); 1046 struct mlxsw_driver *mlxsw_driver = mlxsw_core->driver; 1047 struct mlxsw_core_port *mlxsw_core_port = __dl_port(devlink_port); 1048 1049 if (!mlxsw_driver->sb_occ_port_pool_get || 1050 !mlxsw_core_port_check(mlxsw_core_port)) 1051 return -EOPNOTSUPP; 1052 return mlxsw_driver->sb_occ_port_pool_get(mlxsw_core_port, sb_index, 1053 pool_index, p_cur, p_max); 1054 } 1055 1056 static int 1057 mlxsw_devlink_sb_occ_tc_port_bind_get(struct devlink_port *devlink_port, 1058 unsigned int sb_index, u16 tc_index, 1059 enum devlink_sb_pool_type pool_type, 1060 u32 *p_cur, u32 *p_max) 1061 { 1062 struct mlxsw_core *mlxsw_core = devlink_priv(devlink_port->devlink); 1063 struct mlxsw_driver *mlxsw_driver = mlxsw_core->driver; 1064 struct mlxsw_core_port *mlxsw_core_port = __dl_port(devlink_port); 1065 1066 if (!mlxsw_driver->sb_occ_tc_port_bind_get || 1067 !mlxsw_core_port_check(mlxsw_core_port)) 1068 return -EOPNOTSUPP; 1069 return mlxsw_driver->sb_occ_tc_port_bind_get(mlxsw_core_port, 1070 sb_index, tc_index, 1071 pool_type, p_cur, p_max); 1072 } 1073 1074 static int 1075 mlxsw_devlink_info_get(struct devlink *devlink, struct devlink_info_req *req, 1076 struct netlink_ext_ack *extack) 1077 { 1078 struct mlxsw_core *mlxsw_core = devlink_priv(devlink); 1079 char fw_info_psid[MLXSW_REG_MGIR_FW_INFO_PSID_SIZE]; 1080 u32 hw_rev, fw_major, fw_minor, fw_sub_minor; 1081 char mgir_pl[MLXSW_REG_MGIR_LEN]; 1082 char buf[32]; 1083 int err; 1084 1085 err = devlink_info_driver_name_put(req, 1086 mlxsw_core->bus_info->device_kind); 1087 if (err) 1088 return err; 1089 1090 mlxsw_reg_mgir_pack(mgir_pl); 1091 err = mlxsw_reg_query(mlxsw_core, MLXSW_REG(mgir), mgir_pl); 1092 if (err) 1093 return err; 1094 mlxsw_reg_mgir_unpack(mgir_pl, &hw_rev, fw_info_psid, &fw_major, 1095 &fw_minor, &fw_sub_minor); 1096 1097 sprintf(buf, "%X", hw_rev); 1098 err = devlink_info_version_fixed_put(req, "hw.revision", buf); 1099 if (err) 1100 return err; 1101 1102 err = devlink_info_version_fixed_put(req, "fw.psid", fw_info_psid); 1103 if (err) 1104 return err; 1105 1106 sprintf(buf, "%d.%d.%d", fw_major, fw_minor, fw_sub_minor); 1107 err = devlink_info_version_running_put(req, "fw.version", buf); 1108 if (err) 1109 return err; 1110 1111 return 0; 1112 } 1113 1114 static int 1115 mlxsw_devlink_core_bus_device_reload_down(struct devlink *devlink, 1116 bool netns_change, 1117 struct netlink_ext_ack *extack) 1118 { 1119 struct mlxsw_core *mlxsw_core = devlink_priv(devlink); 1120 1121 if (!(mlxsw_core->bus->features & MLXSW_BUS_F_RESET)) 1122 return -EOPNOTSUPP; 1123 1124 mlxsw_core_bus_device_unregister(mlxsw_core, true); 1125 return 0; 1126 } 1127 1128 static int 1129 mlxsw_devlink_core_bus_device_reload_up(struct devlink *devlink, 1130 struct netlink_ext_ack *extack) 1131 { 1132 struct mlxsw_core *mlxsw_core = devlink_priv(devlink); 1133 1134 return mlxsw_core_bus_device_register(mlxsw_core->bus_info, 1135 mlxsw_core->bus, 1136 mlxsw_core->bus_priv, true, 1137 devlink, extack); 1138 } 1139 1140 static int mlxsw_devlink_flash_update(struct devlink *devlink, 1141 const char *file_name, 1142 const char *component, 1143 struct netlink_ext_ack *extack) 1144 { 1145 struct mlxsw_core *mlxsw_core = devlink_priv(devlink); 1146 struct mlxsw_driver *mlxsw_driver = mlxsw_core->driver; 1147 1148 if (!mlxsw_driver->flash_update) 1149 return -EOPNOTSUPP; 1150 return mlxsw_driver->flash_update(mlxsw_core, file_name, 1151 component, extack); 1152 } 1153 1154 static int mlxsw_devlink_trap_init(struct devlink *devlink, 1155 const struct devlink_trap *trap, 1156 void *trap_ctx) 1157 { 1158 struct mlxsw_core *mlxsw_core = devlink_priv(devlink); 1159 struct mlxsw_driver *mlxsw_driver = mlxsw_core->driver; 1160 1161 if (!mlxsw_driver->trap_init) 1162 return -EOPNOTSUPP; 1163 return mlxsw_driver->trap_init(mlxsw_core, trap, trap_ctx); 1164 } 1165 1166 static void mlxsw_devlink_trap_fini(struct devlink *devlink, 1167 const struct devlink_trap *trap, 1168 void *trap_ctx) 1169 { 1170 struct mlxsw_core *mlxsw_core = devlink_priv(devlink); 1171 struct mlxsw_driver *mlxsw_driver = mlxsw_core->driver; 1172 1173 if (!mlxsw_driver->trap_fini) 1174 return; 1175 mlxsw_driver->trap_fini(mlxsw_core, trap, trap_ctx); 1176 } 1177 1178 static int mlxsw_devlink_trap_action_set(struct devlink *devlink, 1179 const struct devlink_trap *trap, 1180 enum devlink_trap_action action) 1181 { 1182 struct mlxsw_core *mlxsw_core = devlink_priv(devlink); 1183 struct mlxsw_driver *mlxsw_driver = mlxsw_core->driver; 1184 1185 if (!mlxsw_driver->trap_action_set) 1186 return -EOPNOTSUPP; 1187 return mlxsw_driver->trap_action_set(mlxsw_core, trap, action); 1188 } 1189 1190 static int 1191 mlxsw_devlink_trap_group_init(struct devlink *devlink, 1192 const struct devlink_trap_group *group) 1193 { 1194 struct mlxsw_core *mlxsw_core = devlink_priv(devlink); 1195 struct mlxsw_driver *mlxsw_driver = mlxsw_core->driver; 1196 1197 if (!mlxsw_driver->trap_group_init) 1198 return -EOPNOTSUPP; 1199 return mlxsw_driver->trap_group_init(mlxsw_core, group); 1200 } 1201 1202 static int 1203 mlxsw_devlink_trap_group_set(struct devlink *devlink, 1204 const struct devlink_trap_group *group, 1205 const struct devlink_trap_policer *policer) 1206 { 1207 struct mlxsw_core *mlxsw_core = devlink_priv(devlink); 1208 struct mlxsw_driver *mlxsw_driver = mlxsw_core->driver; 1209 1210 if (!mlxsw_driver->trap_group_set) 1211 return -EOPNOTSUPP; 1212 return mlxsw_driver->trap_group_set(mlxsw_core, group, policer); 1213 } 1214 1215 static int 1216 mlxsw_devlink_trap_policer_init(struct devlink *devlink, 1217 const struct devlink_trap_policer *policer) 1218 { 1219 struct mlxsw_core *mlxsw_core = devlink_priv(devlink); 1220 struct mlxsw_driver *mlxsw_driver = mlxsw_core->driver; 1221 1222 if (!mlxsw_driver->trap_policer_init) 1223 return -EOPNOTSUPP; 1224 return mlxsw_driver->trap_policer_init(mlxsw_core, policer); 1225 } 1226 1227 static void 1228 mlxsw_devlink_trap_policer_fini(struct devlink *devlink, 1229 const struct devlink_trap_policer *policer) 1230 { 1231 struct mlxsw_core *mlxsw_core = devlink_priv(devlink); 1232 struct mlxsw_driver *mlxsw_driver = mlxsw_core->driver; 1233 1234 if (!mlxsw_driver->trap_policer_fini) 1235 return; 1236 mlxsw_driver->trap_policer_fini(mlxsw_core, policer); 1237 } 1238 1239 static int 1240 mlxsw_devlink_trap_policer_set(struct devlink *devlink, 1241 const struct devlink_trap_policer *policer, 1242 u64 rate, u64 burst, 1243 struct netlink_ext_ack *extack) 1244 { 1245 struct mlxsw_core *mlxsw_core = devlink_priv(devlink); 1246 struct mlxsw_driver *mlxsw_driver = mlxsw_core->driver; 1247 1248 if (!mlxsw_driver->trap_policer_set) 1249 return -EOPNOTSUPP; 1250 return mlxsw_driver->trap_policer_set(mlxsw_core, policer, rate, burst, 1251 extack); 1252 } 1253 1254 static int 1255 mlxsw_devlink_trap_policer_counter_get(struct devlink *devlink, 1256 const struct devlink_trap_policer *policer, 1257 u64 *p_drops) 1258 { 1259 struct mlxsw_core *mlxsw_core = devlink_priv(devlink); 1260 struct mlxsw_driver *mlxsw_driver = mlxsw_core->driver; 1261 1262 if (!mlxsw_driver->trap_policer_counter_get) 1263 return -EOPNOTSUPP; 1264 return mlxsw_driver->trap_policer_counter_get(mlxsw_core, policer, 1265 p_drops); 1266 } 1267 1268 static const struct devlink_ops mlxsw_devlink_ops = { 1269 .reload_down = mlxsw_devlink_core_bus_device_reload_down, 1270 .reload_up = mlxsw_devlink_core_bus_device_reload_up, 1271 .port_type_set = mlxsw_devlink_port_type_set, 1272 .port_split = mlxsw_devlink_port_split, 1273 .port_unsplit = mlxsw_devlink_port_unsplit, 1274 .sb_pool_get = mlxsw_devlink_sb_pool_get, 1275 .sb_pool_set = mlxsw_devlink_sb_pool_set, 1276 .sb_port_pool_get = mlxsw_devlink_sb_port_pool_get, 1277 .sb_port_pool_set = mlxsw_devlink_sb_port_pool_set, 1278 .sb_tc_pool_bind_get = mlxsw_devlink_sb_tc_pool_bind_get, 1279 .sb_tc_pool_bind_set = mlxsw_devlink_sb_tc_pool_bind_set, 1280 .sb_occ_snapshot = mlxsw_devlink_sb_occ_snapshot, 1281 .sb_occ_max_clear = mlxsw_devlink_sb_occ_max_clear, 1282 .sb_occ_port_pool_get = mlxsw_devlink_sb_occ_port_pool_get, 1283 .sb_occ_tc_port_bind_get = mlxsw_devlink_sb_occ_tc_port_bind_get, 1284 .info_get = mlxsw_devlink_info_get, 1285 .flash_update = mlxsw_devlink_flash_update, 1286 .trap_init = mlxsw_devlink_trap_init, 1287 .trap_fini = mlxsw_devlink_trap_fini, 1288 .trap_action_set = mlxsw_devlink_trap_action_set, 1289 .trap_group_init = mlxsw_devlink_trap_group_init, 1290 .trap_group_set = mlxsw_devlink_trap_group_set, 1291 .trap_policer_init = mlxsw_devlink_trap_policer_init, 1292 .trap_policer_fini = mlxsw_devlink_trap_policer_fini, 1293 .trap_policer_set = mlxsw_devlink_trap_policer_set, 1294 .trap_policer_counter_get = mlxsw_devlink_trap_policer_counter_get, 1295 }; 1296 1297 static int 1298 __mlxsw_core_bus_device_register(const struct mlxsw_bus_info *mlxsw_bus_info, 1299 const struct mlxsw_bus *mlxsw_bus, 1300 void *bus_priv, bool reload, 1301 struct devlink *devlink, 1302 struct netlink_ext_ack *extack) 1303 { 1304 const char *device_kind = mlxsw_bus_info->device_kind; 1305 struct mlxsw_core *mlxsw_core; 1306 struct mlxsw_driver *mlxsw_driver; 1307 struct mlxsw_res *res; 1308 size_t alloc_size; 1309 int err; 1310 1311 mlxsw_driver = mlxsw_core_driver_get(device_kind); 1312 if (!mlxsw_driver) 1313 return -EINVAL; 1314 1315 if (!reload) { 1316 alloc_size = sizeof(*mlxsw_core) + mlxsw_driver->priv_size; 1317 devlink = devlink_alloc(&mlxsw_devlink_ops, alloc_size); 1318 if (!devlink) { 1319 err = -ENOMEM; 1320 goto err_devlink_alloc; 1321 } 1322 } 1323 1324 mlxsw_core = devlink_priv(devlink); 1325 INIT_LIST_HEAD(&mlxsw_core->rx_listener_list); 1326 INIT_LIST_HEAD(&mlxsw_core->event_listener_list); 1327 mlxsw_core->driver = mlxsw_driver; 1328 mlxsw_core->bus = mlxsw_bus; 1329 mlxsw_core->bus_priv = bus_priv; 1330 mlxsw_core->bus_info = mlxsw_bus_info; 1331 1332 res = mlxsw_driver->res_query_enabled ? &mlxsw_core->res : NULL; 1333 err = mlxsw_bus->init(bus_priv, mlxsw_core, mlxsw_driver->profile, res); 1334 if (err) 1335 goto err_bus_init; 1336 1337 if (mlxsw_driver->resources_register && !reload) { 1338 err = mlxsw_driver->resources_register(mlxsw_core); 1339 if (err) 1340 goto err_register_resources; 1341 } 1342 1343 err = mlxsw_ports_init(mlxsw_core); 1344 if (err) 1345 goto err_ports_init; 1346 1347 if (MLXSW_CORE_RES_VALID(mlxsw_core, MAX_LAG) && 1348 MLXSW_CORE_RES_VALID(mlxsw_core, MAX_LAG_MEMBERS)) { 1349 alloc_size = sizeof(u8) * 1350 MLXSW_CORE_RES_GET(mlxsw_core, MAX_LAG) * 1351 MLXSW_CORE_RES_GET(mlxsw_core, MAX_LAG_MEMBERS); 1352 mlxsw_core->lag.mapping = kzalloc(alloc_size, GFP_KERNEL); 1353 if (!mlxsw_core->lag.mapping) { 1354 err = -ENOMEM; 1355 goto err_alloc_lag_mapping; 1356 } 1357 } 1358 1359 err = mlxsw_emad_init(mlxsw_core); 1360 if (err) 1361 goto err_emad_init; 1362 1363 if (!reload) { 1364 err = devlink_register(devlink, mlxsw_bus_info->dev); 1365 if (err) 1366 goto err_devlink_register; 1367 } 1368 1369 if (mlxsw_driver->params_register && !reload) { 1370 err = mlxsw_driver->params_register(mlxsw_core); 1371 if (err) 1372 goto err_register_params; 1373 } 1374 1375 if (mlxsw_driver->init) { 1376 err = mlxsw_driver->init(mlxsw_core, mlxsw_bus_info, extack); 1377 if (err) 1378 goto err_driver_init; 1379 } 1380 1381 err = mlxsw_hwmon_init(mlxsw_core, mlxsw_bus_info, &mlxsw_core->hwmon); 1382 if (err) 1383 goto err_hwmon_init; 1384 1385 err = mlxsw_thermal_init(mlxsw_core, mlxsw_bus_info, 1386 &mlxsw_core->thermal); 1387 if (err) 1388 goto err_thermal_init; 1389 1390 if (mlxsw_driver->params_register) 1391 devlink_params_publish(devlink); 1392 1393 if (!reload) 1394 devlink_reload_enable(devlink); 1395 1396 return 0; 1397 1398 err_thermal_init: 1399 mlxsw_hwmon_fini(mlxsw_core->hwmon); 1400 err_hwmon_init: 1401 if (mlxsw_core->driver->fini) 1402 mlxsw_core->driver->fini(mlxsw_core); 1403 err_driver_init: 1404 if (mlxsw_driver->params_unregister && !reload) 1405 mlxsw_driver->params_unregister(mlxsw_core); 1406 err_register_params: 1407 if (!reload) 1408 devlink_unregister(devlink); 1409 err_devlink_register: 1410 mlxsw_emad_fini(mlxsw_core); 1411 err_emad_init: 1412 kfree(mlxsw_core->lag.mapping); 1413 err_alloc_lag_mapping: 1414 mlxsw_ports_fini(mlxsw_core); 1415 err_ports_init: 1416 if (!reload) 1417 devlink_resources_unregister(devlink, NULL); 1418 err_register_resources: 1419 mlxsw_bus->fini(bus_priv); 1420 err_bus_init: 1421 if (!reload) 1422 devlink_free(devlink); 1423 err_devlink_alloc: 1424 return err; 1425 } 1426 1427 int mlxsw_core_bus_device_register(const struct mlxsw_bus_info *mlxsw_bus_info, 1428 const struct mlxsw_bus *mlxsw_bus, 1429 void *bus_priv, bool reload, 1430 struct devlink *devlink, 1431 struct netlink_ext_ack *extack) 1432 { 1433 bool called_again = false; 1434 int err; 1435 1436 again: 1437 err = __mlxsw_core_bus_device_register(mlxsw_bus_info, mlxsw_bus, 1438 bus_priv, reload, 1439 devlink, extack); 1440 /* -EAGAIN is returned in case the FW was updated. FW needs 1441 * a reset, so lets try to call __mlxsw_core_bus_device_register() 1442 * again. 1443 */ 1444 if (err == -EAGAIN && !called_again) { 1445 called_again = true; 1446 goto again; 1447 } 1448 1449 return err; 1450 } 1451 EXPORT_SYMBOL(mlxsw_core_bus_device_register); 1452 1453 void mlxsw_core_bus_device_unregister(struct mlxsw_core *mlxsw_core, 1454 bool reload) 1455 { 1456 struct devlink *devlink = priv_to_devlink(mlxsw_core); 1457 1458 if (!reload) 1459 devlink_reload_disable(devlink); 1460 if (devlink_is_reload_failed(devlink)) { 1461 if (!reload) 1462 /* Only the parts that were not de-initialized in the 1463 * failed reload attempt need to be de-initialized. 1464 */ 1465 goto reload_fail_deinit; 1466 else 1467 return; 1468 } 1469 1470 if (mlxsw_core->driver->params_unregister) 1471 devlink_params_unpublish(devlink); 1472 mlxsw_thermal_fini(mlxsw_core->thermal); 1473 mlxsw_hwmon_fini(mlxsw_core->hwmon); 1474 if (mlxsw_core->driver->fini) 1475 mlxsw_core->driver->fini(mlxsw_core); 1476 if (mlxsw_core->driver->params_unregister && !reload) 1477 mlxsw_core->driver->params_unregister(mlxsw_core); 1478 if (!reload) 1479 devlink_unregister(devlink); 1480 mlxsw_emad_fini(mlxsw_core); 1481 kfree(mlxsw_core->lag.mapping); 1482 mlxsw_ports_fini(mlxsw_core); 1483 if (!reload) 1484 devlink_resources_unregister(devlink, NULL); 1485 mlxsw_core->bus->fini(mlxsw_core->bus_priv); 1486 1487 return; 1488 1489 reload_fail_deinit: 1490 if (mlxsw_core->driver->params_unregister) 1491 mlxsw_core->driver->params_unregister(mlxsw_core); 1492 devlink_unregister(devlink); 1493 devlink_resources_unregister(devlink, NULL); 1494 devlink_free(devlink); 1495 } 1496 EXPORT_SYMBOL(mlxsw_core_bus_device_unregister); 1497 1498 bool mlxsw_core_skb_transmit_busy(struct mlxsw_core *mlxsw_core, 1499 const struct mlxsw_tx_info *tx_info) 1500 { 1501 return mlxsw_core->bus->skb_transmit_busy(mlxsw_core->bus_priv, 1502 tx_info); 1503 } 1504 EXPORT_SYMBOL(mlxsw_core_skb_transmit_busy); 1505 1506 int mlxsw_core_skb_transmit(struct mlxsw_core *mlxsw_core, struct sk_buff *skb, 1507 const struct mlxsw_tx_info *tx_info) 1508 { 1509 return mlxsw_core->bus->skb_transmit(mlxsw_core->bus_priv, skb, 1510 tx_info); 1511 } 1512 EXPORT_SYMBOL(mlxsw_core_skb_transmit); 1513 1514 void mlxsw_core_ptp_transmitted(struct mlxsw_core *mlxsw_core, 1515 struct sk_buff *skb, u8 local_port) 1516 { 1517 if (mlxsw_core->driver->ptp_transmitted) 1518 mlxsw_core->driver->ptp_transmitted(mlxsw_core, skb, 1519 local_port); 1520 } 1521 EXPORT_SYMBOL(mlxsw_core_ptp_transmitted); 1522 1523 static bool __is_rx_listener_equal(const struct mlxsw_rx_listener *rxl_a, 1524 const struct mlxsw_rx_listener *rxl_b) 1525 { 1526 return (rxl_a->func == rxl_b->func && 1527 rxl_a->local_port == rxl_b->local_port && 1528 rxl_a->trap_id == rxl_b->trap_id && 1529 rxl_a->mirror_reason == rxl_b->mirror_reason); 1530 } 1531 1532 static struct mlxsw_rx_listener_item * 1533 __find_rx_listener_item(struct mlxsw_core *mlxsw_core, 1534 const struct mlxsw_rx_listener *rxl) 1535 { 1536 struct mlxsw_rx_listener_item *rxl_item; 1537 1538 list_for_each_entry(rxl_item, &mlxsw_core->rx_listener_list, list) { 1539 if (__is_rx_listener_equal(&rxl_item->rxl, rxl)) 1540 return rxl_item; 1541 } 1542 return NULL; 1543 } 1544 1545 int mlxsw_core_rx_listener_register(struct mlxsw_core *mlxsw_core, 1546 const struct mlxsw_rx_listener *rxl, 1547 void *priv, bool enabled) 1548 { 1549 struct mlxsw_rx_listener_item *rxl_item; 1550 1551 rxl_item = __find_rx_listener_item(mlxsw_core, rxl); 1552 if (rxl_item) 1553 return -EEXIST; 1554 rxl_item = kmalloc(sizeof(*rxl_item), GFP_KERNEL); 1555 if (!rxl_item) 1556 return -ENOMEM; 1557 rxl_item->rxl = *rxl; 1558 rxl_item->priv = priv; 1559 rxl_item->enabled = enabled; 1560 1561 list_add_rcu(&rxl_item->list, &mlxsw_core->rx_listener_list); 1562 return 0; 1563 } 1564 EXPORT_SYMBOL(mlxsw_core_rx_listener_register); 1565 1566 void mlxsw_core_rx_listener_unregister(struct mlxsw_core *mlxsw_core, 1567 const struct mlxsw_rx_listener *rxl) 1568 { 1569 struct mlxsw_rx_listener_item *rxl_item; 1570 1571 rxl_item = __find_rx_listener_item(mlxsw_core, rxl); 1572 if (!rxl_item) 1573 return; 1574 list_del_rcu(&rxl_item->list); 1575 synchronize_rcu(); 1576 kfree(rxl_item); 1577 } 1578 EXPORT_SYMBOL(mlxsw_core_rx_listener_unregister); 1579 1580 static void 1581 mlxsw_core_rx_listener_state_set(struct mlxsw_core *mlxsw_core, 1582 const struct mlxsw_rx_listener *rxl, 1583 bool enabled) 1584 { 1585 struct mlxsw_rx_listener_item *rxl_item; 1586 1587 rxl_item = __find_rx_listener_item(mlxsw_core, rxl); 1588 if (WARN_ON(!rxl_item)) 1589 return; 1590 rxl_item->enabled = enabled; 1591 } 1592 1593 static void mlxsw_core_event_listener_func(struct sk_buff *skb, u8 local_port, 1594 void *priv) 1595 { 1596 struct mlxsw_event_listener_item *event_listener_item = priv; 1597 struct mlxsw_reg_info reg; 1598 char *payload; 1599 char *reg_tlv; 1600 char *op_tlv; 1601 1602 mlxsw_emad_tlv_parse(skb); 1603 op_tlv = mlxsw_emad_op_tlv(skb); 1604 reg_tlv = mlxsw_emad_reg_tlv(skb); 1605 1606 reg.id = mlxsw_emad_op_tlv_register_id_get(op_tlv); 1607 reg.len = (mlxsw_emad_reg_tlv_len_get(reg_tlv) - 1) * sizeof(u32); 1608 payload = mlxsw_emad_reg_payload(reg_tlv); 1609 event_listener_item->el.func(®, payload, event_listener_item->priv); 1610 dev_kfree_skb(skb); 1611 } 1612 1613 static bool __is_event_listener_equal(const struct mlxsw_event_listener *el_a, 1614 const struct mlxsw_event_listener *el_b) 1615 { 1616 return (el_a->func == el_b->func && 1617 el_a->trap_id == el_b->trap_id); 1618 } 1619 1620 static struct mlxsw_event_listener_item * 1621 __find_event_listener_item(struct mlxsw_core *mlxsw_core, 1622 const struct mlxsw_event_listener *el) 1623 { 1624 struct mlxsw_event_listener_item *el_item; 1625 1626 list_for_each_entry(el_item, &mlxsw_core->event_listener_list, list) { 1627 if (__is_event_listener_equal(&el_item->el, el)) 1628 return el_item; 1629 } 1630 return NULL; 1631 } 1632 1633 int mlxsw_core_event_listener_register(struct mlxsw_core *mlxsw_core, 1634 const struct mlxsw_event_listener *el, 1635 void *priv) 1636 { 1637 int err; 1638 struct mlxsw_event_listener_item *el_item; 1639 const struct mlxsw_rx_listener rxl = { 1640 .func = mlxsw_core_event_listener_func, 1641 .local_port = MLXSW_PORT_DONT_CARE, 1642 .trap_id = el->trap_id, 1643 }; 1644 1645 el_item = __find_event_listener_item(mlxsw_core, el); 1646 if (el_item) 1647 return -EEXIST; 1648 el_item = kmalloc(sizeof(*el_item), GFP_KERNEL); 1649 if (!el_item) 1650 return -ENOMEM; 1651 el_item->el = *el; 1652 el_item->priv = priv; 1653 1654 err = mlxsw_core_rx_listener_register(mlxsw_core, &rxl, el_item, true); 1655 if (err) 1656 goto err_rx_listener_register; 1657 1658 /* No reason to save item if we did not manage to register an RX 1659 * listener for it. 1660 */ 1661 list_add_rcu(&el_item->list, &mlxsw_core->event_listener_list); 1662 1663 return 0; 1664 1665 err_rx_listener_register: 1666 kfree(el_item); 1667 return err; 1668 } 1669 EXPORT_SYMBOL(mlxsw_core_event_listener_register); 1670 1671 void mlxsw_core_event_listener_unregister(struct mlxsw_core *mlxsw_core, 1672 const struct mlxsw_event_listener *el) 1673 { 1674 struct mlxsw_event_listener_item *el_item; 1675 const struct mlxsw_rx_listener rxl = { 1676 .func = mlxsw_core_event_listener_func, 1677 .local_port = MLXSW_PORT_DONT_CARE, 1678 .trap_id = el->trap_id, 1679 }; 1680 1681 el_item = __find_event_listener_item(mlxsw_core, el); 1682 if (!el_item) 1683 return; 1684 mlxsw_core_rx_listener_unregister(mlxsw_core, &rxl); 1685 list_del(&el_item->list); 1686 kfree(el_item); 1687 } 1688 EXPORT_SYMBOL(mlxsw_core_event_listener_unregister); 1689 1690 static int mlxsw_core_listener_register(struct mlxsw_core *mlxsw_core, 1691 const struct mlxsw_listener *listener, 1692 void *priv, bool enabled) 1693 { 1694 if (listener->is_event) { 1695 WARN_ON(!enabled); 1696 return mlxsw_core_event_listener_register(mlxsw_core, 1697 &listener->event_listener, 1698 priv); 1699 } else { 1700 return mlxsw_core_rx_listener_register(mlxsw_core, 1701 &listener->rx_listener, 1702 priv, enabled); 1703 } 1704 } 1705 1706 static void mlxsw_core_listener_unregister(struct mlxsw_core *mlxsw_core, 1707 const struct mlxsw_listener *listener, 1708 void *priv) 1709 { 1710 if (listener->is_event) 1711 mlxsw_core_event_listener_unregister(mlxsw_core, 1712 &listener->event_listener); 1713 else 1714 mlxsw_core_rx_listener_unregister(mlxsw_core, 1715 &listener->rx_listener); 1716 } 1717 1718 int mlxsw_core_trap_register(struct mlxsw_core *mlxsw_core, 1719 const struct mlxsw_listener *listener, void *priv) 1720 { 1721 enum mlxsw_reg_htgt_trap_group trap_group; 1722 enum mlxsw_reg_hpkt_action action; 1723 char hpkt_pl[MLXSW_REG_HPKT_LEN]; 1724 int err; 1725 1726 err = mlxsw_core_listener_register(mlxsw_core, listener, priv, 1727 listener->enabled_on_register); 1728 if (err) 1729 return err; 1730 1731 action = listener->enabled_on_register ? listener->en_action : 1732 listener->dis_action; 1733 trap_group = listener->enabled_on_register ? listener->en_trap_group : 1734 listener->dis_trap_group; 1735 mlxsw_reg_hpkt_pack(hpkt_pl, action, listener->trap_id, 1736 trap_group, listener->is_ctrl); 1737 err = mlxsw_reg_write(mlxsw_core, MLXSW_REG(hpkt), hpkt_pl); 1738 if (err) 1739 goto err_trap_set; 1740 1741 return 0; 1742 1743 err_trap_set: 1744 mlxsw_core_listener_unregister(mlxsw_core, listener, priv); 1745 return err; 1746 } 1747 EXPORT_SYMBOL(mlxsw_core_trap_register); 1748 1749 void mlxsw_core_trap_unregister(struct mlxsw_core *mlxsw_core, 1750 const struct mlxsw_listener *listener, 1751 void *priv) 1752 { 1753 char hpkt_pl[MLXSW_REG_HPKT_LEN]; 1754 1755 if (!listener->is_event) { 1756 mlxsw_reg_hpkt_pack(hpkt_pl, listener->dis_action, 1757 listener->trap_id, listener->dis_trap_group, 1758 listener->is_ctrl); 1759 mlxsw_reg_write(mlxsw_core, MLXSW_REG(hpkt), hpkt_pl); 1760 } 1761 1762 mlxsw_core_listener_unregister(mlxsw_core, listener, priv); 1763 } 1764 EXPORT_SYMBOL(mlxsw_core_trap_unregister); 1765 1766 int mlxsw_core_trap_state_set(struct mlxsw_core *mlxsw_core, 1767 const struct mlxsw_listener *listener, 1768 bool enabled) 1769 { 1770 enum mlxsw_reg_htgt_trap_group trap_group; 1771 enum mlxsw_reg_hpkt_action action; 1772 char hpkt_pl[MLXSW_REG_HPKT_LEN]; 1773 int err; 1774 1775 /* Not supported for event listener */ 1776 if (WARN_ON(listener->is_event)) 1777 return -EINVAL; 1778 1779 action = enabled ? listener->en_action : listener->dis_action; 1780 trap_group = enabled ? listener->en_trap_group : 1781 listener->dis_trap_group; 1782 mlxsw_reg_hpkt_pack(hpkt_pl, action, listener->trap_id, 1783 trap_group, listener->is_ctrl); 1784 err = mlxsw_reg_write(mlxsw_core, MLXSW_REG(hpkt), hpkt_pl); 1785 if (err) 1786 return err; 1787 1788 mlxsw_core_rx_listener_state_set(mlxsw_core, &listener->rx_listener, 1789 enabled); 1790 return 0; 1791 } 1792 EXPORT_SYMBOL(mlxsw_core_trap_state_set); 1793 1794 static u64 mlxsw_core_tid_get(struct mlxsw_core *mlxsw_core) 1795 { 1796 return atomic64_inc_return(&mlxsw_core->emad.tid); 1797 } 1798 1799 static int mlxsw_core_reg_access_emad(struct mlxsw_core *mlxsw_core, 1800 const struct mlxsw_reg_info *reg, 1801 char *payload, 1802 enum mlxsw_core_reg_access_type type, 1803 struct list_head *bulk_list, 1804 mlxsw_reg_trans_cb_t *cb, 1805 unsigned long cb_priv) 1806 { 1807 u64 tid = mlxsw_core_tid_get(mlxsw_core); 1808 struct mlxsw_reg_trans *trans; 1809 int err; 1810 1811 trans = kzalloc(sizeof(*trans), GFP_KERNEL); 1812 if (!trans) 1813 return -ENOMEM; 1814 1815 err = mlxsw_emad_reg_access(mlxsw_core, reg, payload, type, trans, 1816 bulk_list, cb, cb_priv, tid); 1817 if (err) { 1818 kfree(trans); 1819 return err; 1820 } 1821 return 0; 1822 } 1823 1824 int mlxsw_reg_trans_query(struct mlxsw_core *mlxsw_core, 1825 const struct mlxsw_reg_info *reg, char *payload, 1826 struct list_head *bulk_list, 1827 mlxsw_reg_trans_cb_t *cb, unsigned long cb_priv) 1828 { 1829 return mlxsw_core_reg_access_emad(mlxsw_core, reg, payload, 1830 MLXSW_CORE_REG_ACCESS_TYPE_QUERY, 1831 bulk_list, cb, cb_priv); 1832 } 1833 EXPORT_SYMBOL(mlxsw_reg_trans_query); 1834 1835 int mlxsw_reg_trans_write(struct mlxsw_core *mlxsw_core, 1836 const struct mlxsw_reg_info *reg, char *payload, 1837 struct list_head *bulk_list, 1838 mlxsw_reg_trans_cb_t *cb, unsigned long cb_priv) 1839 { 1840 return mlxsw_core_reg_access_emad(mlxsw_core, reg, payload, 1841 MLXSW_CORE_REG_ACCESS_TYPE_WRITE, 1842 bulk_list, cb, cb_priv); 1843 } 1844 EXPORT_SYMBOL(mlxsw_reg_trans_write); 1845 1846 #define MLXSW_REG_TRANS_ERR_STRING_SIZE 256 1847 1848 static int mlxsw_reg_trans_wait(struct mlxsw_reg_trans *trans) 1849 { 1850 char err_string[MLXSW_REG_TRANS_ERR_STRING_SIZE]; 1851 struct mlxsw_core *mlxsw_core = trans->core; 1852 int err; 1853 1854 wait_for_completion(&trans->completion); 1855 cancel_delayed_work_sync(&trans->timeout_dw); 1856 err = trans->err; 1857 1858 if (trans->retries) 1859 dev_warn(mlxsw_core->bus_info->dev, "EMAD retries (%d/%d) (tid=%llx)\n", 1860 trans->retries, MLXSW_EMAD_MAX_RETRY, trans->tid); 1861 if (err) { 1862 dev_err(mlxsw_core->bus_info->dev, "EMAD reg access failed (tid=%llx,reg_id=%x(%s),type=%s,status=%x(%s))\n", 1863 trans->tid, trans->reg->id, 1864 mlxsw_reg_id_str(trans->reg->id), 1865 mlxsw_core_reg_access_type_str(trans->type), 1866 trans->emad_status, 1867 mlxsw_emad_op_tlv_status_str(trans->emad_status)); 1868 1869 snprintf(err_string, MLXSW_REG_TRANS_ERR_STRING_SIZE, 1870 "(tid=%llx,reg_id=%x(%s)) %s (%s)\n", trans->tid, 1871 trans->reg->id, mlxsw_reg_id_str(trans->reg->id), 1872 mlxsw_emad_op_tlv_status_str(trans->emad_status), 1873 trans->emad_err_string ? trans->emad_err_string : ""); 1874 1875 trace_devlink_hwerr(priv_to_devlink(mlxsw_core), 1876 trans->emad_status, err_string); 1877 1878 kfree(trans->emad_err_string); 1879 } 1880 1881 list_del(&trans->bulk_list); 1882 kfree_rcu(trans, rcu); 1883 return err; 1884 } 1885 1886 int mlxsw_reg_trans_bulk_wait(struct list_head *bulk_list) 1887 { 1888 struct mlxsw_reg_trans *trans; 1889 struct mlxsw_reg_trans *tmp; 1890 int sum_err = 0; 1891 int err; 1892 1893 list_for_each_entry_safe(trans, tmp, bulk_list, bulk_list) { 1894 err = mlxsw_reg_trans_wait(trans); 1895 if (err && sum_err == 0) 1896 sum_err = err; /* first error to be returned */ 1897 } 1898 return sum_err; 1899 } 1900 EXPORT_SYMBOL(mlxsw_reg_trans_bulk_wait); 1901 1902 static int mlxsw_core_reg_access_cmd(struct mlxsw_core *mlxsw_core, 1903 const struct mlxsw_reg_info *reg, 1904 char *payload, 1905 enum mlxsw_core_reg_access_type type) 1906 { 1907 enum mlxsw_emad_op_tlv_status status; 1908 int err, n_retry; 1909 bool reset_ok; 1910 char *in_mbox, *out_mbox, *tmp; 1911 1912 dev_dbg(mlxsw_core->bus_info->dev, "Reg cmd access (reg_id=%x(%s),type=%s)\n", 1913 reg->id, mlxsw_reg_id_str(reg->id), 1914 mlxsw_core_reg_access_type_str(type)); 1915 1916 in_mbox = mlxsw_cmd_mbox_alloc(); 1917 if (!in_mbox) 1918 return -ENOMEM; 1919 1920 out_mbox = mlxsw_cmd_mbox_alloc(); 1921 if (!out_mbox) { 1922 err = -ENOMEM; 1923 goto free_in_mbox; 1924 } 1925 1926 mlxsw_emad_pack_op_tlv(in_mbox, reg, type, 1927 mlxsw_core_tid_get(mlxsw_core)); 1928 tmp = in_mbox + MLXSW_EMAD_OP_TLV_LEN * sizeof(u32); 1929 mlxsw_emad_pack_reg_tlv(tmp, reg, payload); 1930 1931 /* There is a special treatment needed for MRSR (reset) register. 1932 * The command interface will return error after the command 1933 * is executed, so tell the lower layer to expect it 1934 * and cope accordingly. 1935 */ 1936 reset_ok = reg->id == MLXSW_REG_MRSR_ID; 1937 1938 n_retry = 0; 1939 retry: 1940 err = mlxsw_cmd_access_reg(mlxsw_core, reset_ok, in_mbox, out_mbox); 1941 if (!err) { 1942 err = mlxsw_emad_process_status(out_mbox, &status); 1943 if (err) { 1944 if (err == -EAGAIN && n_retry++ < MLXSW_EMAD_MAX_RETRY) 1945 goto retry; 1946 dev_err(mlxsw_core->bus_info->dev, "Reg cmd access status failed (status=%x(%s))\n", 1947 status, mlxsw_emad_op_tlv_status_str(status)); 1948 } 1949 } 1950 1951 if (!err) 1952 memcpy(payload, mlxsw_emad_reg_payload_cmd(out_mbox), 1953 reg->len); 1954 1955 mlxsw_cmd_mbox_free(out_mbox); 1956 free_in_mbox: 1957 mlxsw_cmd_mbox_free(in_mbox); 1958 if (err) 1959 dev_err(mlxsw_core->bus_info->dev, "Reg cmd access failed (reg_id=%x(%s),type=%s)\n", 1960 reg->id, mlxsw_reg_id_str(reg->id), 1961 mlxsw_core_reg_access_type_str(type)); 1962 return err; 1963 } 1964 1965 static void mlxsw_core_reg_access_cb(struct mlxsw_core *mlxsw_core, 1966 char *payload, size_t payload_len, 1967 unsigned long cb_priv) 1968 { 1969 char *orig_payload = (char *) cb_priv; 1970 1971 memcpy(orig_payload, payload, payload_len); 1972 } 1973 1974 static int mlxsw_core_reg_access(struct mlxsw_core *mlxsw_core, 1975 const struct mlxsw_reg_info *reg, 1976 char *payload, 1977 enum mlxsw_core_reg_access_type type) 1978 { 1979 LIST_HEAD(bulk_list); 1980 int err; 1981 1982 /* During initialization EMAD interface is not available to us, 1983 * so we default to command interface. We switch to EMAD interface 1984 * after setting the appropriate traps. 1985 */ 1986 if (!mlxsw_core->emad.use_emad) 1987 return mlxsw_core_reg_access_cmd(mlxsw_core, reg, 1988 payload, type); 1989 1990 err = mlxsw_core_reg_access_emad(mlxsw_core, reg, 1991 payload, type, &bulk_list, 1992 mlxsw_core_reg_access_cb, 1993 (unsigned long) payload); 1994 if (err) 1995 return err; 1996 return mlxsw_reg_trans_bulk_wait(&bulk_list); 1997 } 1998 1999 int mlxsw_reg_query(struct mlxsw_core *mlxsw_core, 2000 const struct mlxsw_reg_info *reg, char *payload) 2001 { 2002 return mlxsw_core_reg_access(mlxsw_core, reg, payload, 2003 MLXSW_CORE_REG_ACCESS_TYPE_QUERY); 2004 } 2005 EXPORT_SYMBOL(mlxsw_reg_query); 2006 2007 int mlxsw_reg_write(struct mlxsw_core *mlxsw_core, 2008 const struct mlxsw_reg_info *reg, char *payload) 2009 { 2010 return mlxsw_core_reg_access(mlxsw_core, reg, payload, 2011 MLXSW_CORE_REG_ACCESS_TYPE_WRITE); 2012 } 2013 EXPORT_SYMBOL(mlxsw_reg_write); 2014 2015 void mlxsw_core_skb_receive(struct mlxsw_core *mlxsw_core, struct sk_buff *skb, 2016 struct mlxsw_rx_info *rx_info) 2017 { 2018 struct mlxsw_rx_listener_item *rxl_item; 2019 const struct mlxsw_rx_listener *rxl; 2020 u8 local_port; 2021 bool found = false; 2022 2023 if (rx_info->is_lag) { 2024 dev_dbg_ratelimited(mlxsw_core->bus_info->dev, "%s: lag_id = %d, lag_port_index = 0x%x\n", 2025 __func__, rx_info->u.lag_id, 2026 rx_info->trap_id); 2027 /* Upper layer does not care if the skb came from LAG or not, 2028 * so just get the local_port for the lag port and push it up. 2029 */ 2030 local_port = mlxsw_core_lag_mapping_get(mlxsw_core, 2031 rx_info->u.lag_id, 2032 rx_info->lag_port_index); 2033 } else { 2034 local_port = rx_info->u.sys_port; 2035 } 2036 2037 dev_dbg_ratelimited(mlxsw_core->bus_info->dev, "%s: local_port = %d, trap_id = 0x%x\n", 2038 __func__, local_port, rx_info->trap_id); 2039 2040 if ((rx_info->trap_id >= MLXSW_TRAP_ID_MAX) || 2041 (local_port >= mlxsw_core->max_ports)) 2042 goto drop; 2043 2044 rcu_read_lock(); 2045 list_for_each_entry_rcu(rxl_item, &mlxsw_core->rx_listener_list, list) { 2046 rxl = &rxl_item->rxl; 2047 if ((rxl->local_port == MLXSW_PORT_DONT_CARE || 2048 rxl->local_port == local_port) && 2049 rxl->trap_id == rx_info->trap_id && 2050 rxl->mirror_reason == rx_info->mirror_reason) { 2051 if (rxl_item->enabled) 2052 found = true; 2053 break; 2054 } 2055 } 2056 rcu_read_unlock(); 2057 if (!found) 2058 goto drop; 2059 2060 rxl->func(skb, local_port, rxl_item->priv); 2061 return; 2062 2063 drop: 2064 dev_kfree_skb(skb); 2065 } 2066 EXPORT_SYMBOL(mlxsw_core_skb_receive); 2067 2068 static int mlxsw_core_lag_mapping_index(struct mlxsw_core *mlxsw_core, 2069 u16 lag_id, u8 port_index) 2070 { 2071 return MLXSW_CORE_RES_GET(mlxsw_core, MAX_LAG_MEMBERS) * lag_id + 2072 port_index; 2073 } 2074 2075 void mlxsw_core_lag_mapping_set(struct mlxsw_core *mlxsw_core, 2076 u16 lag_id, u8 port_index, u8 local_port) 2077 { 2078 int index = mlxsw_core_lag_mapping_index(mlxsw_core, 2079 lag_id, port_index); 2080 2081 mlxsw_core->lag.mapping[index] = local_port; 2082 } 2083 EXPORT_SYMBOL(mlxsw_core_lag_mapping_set); 2084 2085 u8 mlxsw_core_lag_mapping_get(struct mlxsw_core *mlxsw_core, 2086 u16 lag_id, u8 port_index) 2087 { 2088 int index = mlxsw_core_lag_mapping_index(mlxsw_core, 2089 lag_id, port_index); 2090 2091 return mlxsw_core->lag.mapping[index]; 2092 } 2093 EXPORT_SYMBOL(mlxsw_core_lag_mapping_get); 2094 2095 void mlxsw_core_lag_mapping_clear(struct mlxsw_core *mlxsw_core, 2096 u16 lag_id, u8 local_port) 2097 { 2098 int i; 2099 2100 for (i = 0; i < MLXSW_CORE_RES_GET(mlxsw_core, MAX_LAG_MEMBERS); i++) { 2101 int index = mlxsw_core_lag_mapping_index(mlxsw_core, 2102 lag_id, i); 2103 2104 if (mlxsw_core->lag.mapping[index] == local_port) 2105 mlxsw_core->lag.mapping[index] = 0; 2106 } 2107 } 2108 EXPORT_SYMBOL(mlxsw_core_lag_mapping_clear); 2109 2110 bool mlxsw_core_res_valid(struct mlxsw_core *mlxsw_core, 2111 enum mlxsw_res_id res_id) 2112 { 2113 return mlxsw_res_valid(&mlxsw_core->res, res_id); 2114 } 2115 EXPORT_SYMBOL(mlxsw_core_res_valid); 2116 2117 u64 mlxsw_core_res_get(struct mlxsw_core *mlxsw_core, 2118 enum mlxsw_res_id res_id) 2119 { 2120 return mlxsw_res_get(&mlxsw_core->res, res_id); 2121 } 2122 EXPORT_SYMBOL(mlxsw_core_res_get); 2123 2124 static int __mlxsw_core_port_init(struct mlxsw_core *mlxsw_core, u8 local_port, 2125 enum devlink_port_flavour flavour, 2126 u32 port_number, bool split, 2127 u32 split_port_subnumber, 2128 bool splittable, u32 lanes, 2129 const unsigned char *switch_id, 2130 unsigned char switch_id_len) 2131 { 2132 struct devlink *devlink = priv_to_devlink(mlxsw_core); 2133 struct mlxsw_core_port *mlxsw_core_port = 2134 &mlxsw_core->ports[local_port]; 2135 struct devlink_port *devlink_port = &mlxsw_core_port->devlink_port; 2136 struct devlink_port_attrs attrs = {}; 2137 int err; 2138 2139 attrs.split = split; 2140 attrs.lanes = lanes; 2141 attrs.splittable = splittable; 2142 attrs.flavour = flavour; 2143 attrs.phys.port_number = port_number; 2144 attrs.phys.split_subport_number = split_port_subnumber; 2145 memcpy(attrs.switch_id.id, switch_id, switch_id_len); 2146 attrs.switch_id.id_len = switch_id_len; 2147 mlxsw_core_port->local_port = local_port; 2148 devlink_port_attrs_set(devlink_port, &attrs); 2149 err = devlink_port_register(devlink, devlink_port, local_port); 2150 if (err) 2151 memset(mlxsw_core_port, 0, sizeof(*mlxsw_core_port)); 2152 return err; 2153 } 2154 2155 static void __mlxsw_core_port_fini(struct mlxsw_core *mlxsw_core, u8 local_port) 2156 { 2157 struct mlxsw_core_port *mlxsw_core_port = 2158 &mlxsw_core->ports[local_port]; 2159 struct devlink_port *devlink_port = &mlxsw_core_port->devlink_port; 2160 2161 devlink_port_unregister(devlink_port); 2162 memset(mlxsw_core_port, 0, sizeof(*mlxsw_core_port)); 2163 } 2164 2165 int mlxsw_core_port_init(struct mlxsw_core *mlxsw_core, u8 local_port, 2166 u32 port_number, bool split, 2167 u32 split_port_subnumber, 2168 bool splittable, u32 lanes, 2169 const unsigned char *switch_id, 2170 unsigned char switch_id_len) 2171 { 2172 return __mlxsw_core_port_init(mlxsw_core, local_port, 2173 DEVLINK_PORT_FLAVOUR_PHYSICAL, 2174 port_number, split, split_port_subnumber, 2175 splittable, lanes, 2176 switch_id, switch_id_len); 2177 } 2178 EXPORT_SYMBOL(mlxsw_core_port_init); 2179 2180 void mlxsw_core_port_fini(struct mlxsw_core *mlxsw_core, u8 local_port) 2181 { 2182 __mlxsw_core_port_fini(mlxsw_core, local_port); 2183 } 2184 EXPORT_SYMBOL(mlxsw_core_port_fini); 2185 2186 int mlxsw_core_cpu_port_init(struct mlxsw_core *mlxsw_core, 2187 void *port_driver_priv, 2188 const unsigned char *switch_id, 2189 unsigned char switch_id_len) 2190 { 2191 struct mlxsw_core_port *mlxsw_core_port = 2192 &mlxsw_core->ports[MLXSW_PORT_CPU_PORT]; 2193 int err; 2194 2195 err = __mlxsw_core_port_init(mlxsw_core, MLXSW_PORT_CPU_PORT, 2196 DEVLINK_PORT_FLAVOUR_CPU, 2197 0, false, 0, false, 0, 2198 switch_id, switch_id_len); 2199 if (err) 2200 return err; 2201 2202 mlxsw_core_port->port_driver_priv = port_driver_priv; 2203 return 0; 2204 } 2205 EXPORT_SYMBOL(mlxsw_core_cpu_port_init); 2206 2207 void mlxsw_core_cpu_port_fini(struct mlxsw_core *mlxsw_core) 2208 { 2209 __mlxsw_core_port_fini(mlxsw_core, MLXSW_PORT_CPU_PORT); 2210 } 2211 EXPORT_SYMBOL(mlxsw_core_cpu_port_fini); 2212 2213 void mlxsw_core_port_eth_set(struct mlxsw_core *mlxsw_core, u8 local_port, 2214 void *port_driver_priv, struct net_device *dev) 2215 { 2216 struct mlxsw_core_port *mlxsw_core_port = 2217 &mlxsw_core->ports[local_port]; 2218 struct devlink_port *devlink_port = &mlxsw_core_port->devlink_port; 2219 2220 mlxsw_core_port->port_driver_priv = port_driver_priv; 2221 devlink_port_type_eth_set(devlink_port, dev); 2222 } 2223 EXPORT_SYMBOL(mlxsw_core_port_eth_set); 2224 2225 void mlxsw_core_port_ib_set(struct mlxsw_core *mlxsw_core, u8 local_port, 2226 void *port_driver_priv) 2227 { 2228 struct mlxsw_core_port *mlxsw_core_port = 2229 &mlxsw_core->ports[local_port]; 2230 struct devlink_port *devlink_port = &mlxsw_core_port->devlink_port; 2231 2232 mlxsw_core_port->port_driver_priv = port_driver_priv; 2233 devlink_port_type_ib_set(devlink_port, NULL); 2234 } 2235 EXPORT_SYMBOL(mlxsw_core_port_ib_set); 2236 2237 void mlxsw_core_port_clear(struct mlxsw_core *mlxsw_core, u8 local_port, 2238 void *port_driver_priv) 2239 { 2240 struct mlxsw_core_port *mlxsw_core_port = 2241 &mlxsw_core->ports[local_port]; 2242 struct devlink_port *devlink_port = &mlxsw_core_port->devlink_port; 2243 2244 mlxsw_core_port->port_driver_priv = port_driver_priv; 2245 devlink_port_type_clear(devlink_port); 2246 } 2247 EXPORT_SYMBOL(mlxsw_core_port_clear); 2248 2249 enum devlink_port_type mlxsw_core_port_type_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->type; 2257 } 2258 EXPORT_SYMBOL(mlxsw_core_port_type_get); 2259 2260 2261 struct devlink_port * 2262 mlxsw_core_port_devlink_port_get(struct mlxsw_core *mlxsw_core, 2263 u8 local_port) 2264 { 2265 struct mlxsw_core_port *mlxsw_core_port = 2266 &mlxsw_core->ports[local_port]; 2267 struct devlink_port *devlink_port = &mlxsw_core_port->devlink_port; 2268 2269 return devlink_port; 2270 } 2271 EXPORT_SYMBOL(mlxsw_core_port_devlink_port_get); 2272 2273 int mlxsw_core_module_max_width(struct mlxsw_core *mlxsw_core, u8 module) 2274 { 2275 enum mlxsw_reg_pmtm_module_type module_type; 2276 char pmtm_pl[MLXSW_REG_PMTM_LEN]; 2277 int err; 2278 2279 mlxsw_reg_pmtm_pack(pmtm_pl, module); 2280 err = mlxsw_reg_query(mlxsw_core, MLXSW_REG(pmtm), pmtm_pl); 2281 if (err) 2282 return err; 2283 mlxsw_reg_pmtm_unpack(pmtm_pl, &module_type); 2284 2285 /* Here we need to get the module width according to the module type. */ 2286 2287 switch (module_type) { 2288 case MLXSW_REG_PMTM_MODULE_TYPE_C2C8X: /* fall through */ 2289 case MLXSW_REG_PMTM_MODULE_TYPE_QSFP_DD: /* fall through */ 2290 case MLXSW_REG_PMTM_MODULE_TYPE_OSFP: 2291 return 8; 2292 case MLXSW_REG_PMTM_MODULE_TYPE_C2C4X: /* fall through */ 2293 case MLXSW_REG_PMTM_MODULE_TYPE_BP_4X: /* fall through */ 2294 case MLXSW_REG_PMTM_MODULE_TYPE_QSFP: 2295 return 4; 2296 case MLXSW_REG_PMTM_MODULE_TYPE_C2C2X: /* fall through */ 2297 case MLXSW_REG_PMTM_MODULE_TYPE_BP_2X: /* fall through */ 2298 case MLXSW_REG_PMTM_MODULE_TYPE_SFP_DD: /* fall through */ 2299 case MLXSW_REG_PMTM_MODULE_TYPE_DSFP: 2300 return 2; 2301 case MLXSW_REG_PMTM_MODULE_TYPE_C2C1X: /* fall through */ 2302 case MLXSW_REG_PMTM_MODULE_TYPE_BP_1X: /* fall through */ 2303 case MLXSW_REG_PMTM_MODULE_TYPE_SFP: 2304 return 1; 2305 default: 2306 return -EINVAL; 2307 } 2308 } 2309 EXPORT_SYMBOL(mlxsw_core_module_max_width); 2310 2311 static void mlxsw_core_buf_dump_dbg(struct mlxsw_core *mlxsw_core, 2312 const char *buf, size_t size) 2313 { 2314 __be32 *m = (__be32 *) buf; 2315 int i; 2316 int count = size / sizeof(__be32); 2317 2318 for (i = count - 1; i >= 0; i--) 2319 if (m[i]) 2320 break; 2321 i++; 2322 count = i ? i : 1; 2323 for (i = 0; i < count; i += 4) 2324 dev_dbg(mlxsw_core->bus_info->dev, "%04x - %08x %08x %08x %08x\n", 2325 i * 4, be32_to_cpu(m[i]), be32_to_cpu(m[i + 1]), 2326 be32_to_cpu(m[i + 2]), be32_to_cpu(m[i + 3])); 2327 } 2328 2329 int mlxsw_cmd_exec(struct mlxsw_core *mlxsw_core, u16 opcode, u8 opcode_mod, 2330 u32 in_mod, bool out_mbox_direct, bool reset_ok, 2331 char *in_mbox, size_t in_mbox_size, 2332 char *out_mbox, size_t out_mbox_size) 2333 { 2334 u8 status; 2335 int err; 2336 2337 BUG_ON(in_mbox_size % sizeof(u32) || out_mbox_size % sizeof(u32)); 2338 if (!mlxsw_core->bus->cmd_exec) 2339 return -EOPNOTSUPP; 2340 2341 dev_dbg(mlxsw_core->bus_info->dev, "Cmd exec (opcode=%x(%s),opcode_mod=%x,in_mod=%x)\n", 2342 opcode, mlxsw_cmd_opcode_str(opcode), opcode_mod, in_mod); 2343 if (in_mbox) { 2344 dev_dbg(mlxsw_core->bus_info->dev, "Input mailbox:\n"); 2345 mlxsw_core_buf_dump_dbg(mlxsw_core, in_mbox, in_mbox_size); 2346 } 2347 2348 err = mlxsw_core->bus->cmd_exec(mlxsw_core->bus_priv, opcode, 2349 opcode_mod, in_mod, out_mbox_direct, 2350 in_mbox, in_mbox_size, 2351 out_mbox, out_mbox_size, &status); 2352 2353 if (!err && out_mbox) { 2354 dev_dbg(mlxsw_core->bus_info->dev, "Output mailbox:\n"); 2355 mlxsw_core_buf_dump_dbg(mlxsw_core, out_mbox, out_mbox_size); 2356 } 2357 2358 if (reset_ok && err == -EIO && 2359 status == MLXSW_CMD_STATUS_RUNNING_RESET) { 2360 err = 0; 2361 } else if (err == -EIO && status != MLXSW_CMD_STATUS_OK) { 2362 dev_err(mlxsw_core->bus_info->dev, "Cmd exec failed (opcode=%x(%s),opcode_mod=%x,in_mod=%x,status=%x(%s))\n", 2363 opcode, mlxsw_cmd_opcode_str(opcode), opcode_mod, 2364 in_mod, status, mlxsw_cmd_status_str(status)); 2365 } else if (err == -ETIMEDOUT) { 2366 dev_err(mlxsw_core->bus_info->dev, "Cmd exec timed-out (opcode=%x(%s),opcode_mod=%x,in_mod=%x)\n", 2367 opcode, mlxsw_cmd_opcode_str(opcode), opcode_mod, 2368 in_mod); 2369 } 2370 2371 return err; 2372 } 2373 EXPORT_SYMBOL(mlxsw_cmd_exec); 2374 2375 int mlxsw_core_schedule_dw(struct delayed_work *dwork, unsigned long delay) 2376 { 2377 return queue_delayed_work(mlxsw_wq, dwork, delay); 2378 } 2379 EXPORT_SYMBOL(mlxsw_core_schedule_dw); 2380 2381 bool mlxsw_core_schedule_work(struct work_struct *work) 2382 { 2383 return queue_work(mlxsw_owq, work); 2384 } 2385 EXPORT_SYMBOL(mlxsw_core_schedule_work); 2386 2387 void mlxsw_core_flush_owq(void) 2388 { 2389 flush_workqueue(mlxsw_owq); 2390 } 2391 EXPORT_SYMBOL(mlxsw_core_flush_owq); 2392 2393 int mlxsw_core_kvd_sizes_get(struct mlxsw_core *mlxsw_core, 2394 const struct mlxsw_config_profile *profile, 2395 u64 *p_single_size, u64 *p_double_size, 2396 u64 *p_linear_size) 2397 { 2398 struct mlxsw_driver *driver = mlxsw_core->driver; 2399 2400 if (!driver->kvd_sizes_get) 2401 return -EINVAL; 2402 2403 return driver->kvd_sizes_get(mlxsw_core, profile, 2404 p_single_size, p_double_size, 2405 p_linear_size); 2406 } 2407 EXPORT_SYMBOL(mlxsw_core_kvd_sizes_get); 2408 2409 void mlxsw_core_fw_flash_start(struct mlxsw_core *mlxsw_core) 2410 { 2411 mlxsw_core->fw_flash_in_progress = true; 2412 } 2413 EXPORT_SYMBOL(mlxsw_core_fw_flash_start); 2414 2415 void mlxsw_core_fw_flash_end(struct mlxsw_core *mlxsw_core) 2416 { 2417 mlxsw_core->fw_flash_in_progress = false; 2418 } 2419 EXPORT_SYMBOL(mlxsw_core_fw_flash_end); 2420 2421 int mlxsw_core_resources_query(struct mlxsw_core *mlxsw_core, char *mbox, 2422 struct mlxsw_res *res) 2423 { 2424 int index, i; 2425 u64 data; 2426 u16 id; 2427 int err; 2428 2429 if (!res) 2430 return 0; 2431 2432 mlxsw_cmd_mbox_zero(mbox); 2433 2434 for (index = 0; index < MLXSW_CMD_QUERY_RESOURCES_MAX_QUERIES; 2435 index++) { 2436 err = mlxsw_cmd_query_resources(mlxsw_core, mbox, index); 2437 if (err) 2438 return err; 2439 2440 for (i = 0; i < MLXSW_CMD_QUERY_RESOURCES_PER_QUERY; i++) { 2441 id = mlxsw_cmd_mbox_query_resource_id_get(mbox, i); 2442 data = mlxsw_cmd_mbox_query_resource_data_get(mbox, i); 2443 2444 if (id == MLXSW_CMD_QUERY_RESOURCES_TABLE_END_ID) 2445 return 0; 2446 2447 mlxsw_res_parse(res, id, data); 2448 } 2449 } 2450 2451 /* If after MLXSW_RESOURCES_QUERY_MAX_QUERIES we still didn't get 2452 * MLXSW_RESOURCES_TABLE_END_ID, something went bad in the FW. 2453 */ 2454 return -EIO; 2455 } 2456 EXPORT_SYMBOL(mlxsw_core_resources_query); 2457 2458 u32 mlxsw_core_read_frc_h(struct mlxsw_core *mlxsw_core) 2459 { 2460 return mlxsw_core->bus->read_frc_h(mlxsw_core->bus_priv); 2461 } 2462 EXPORT_SYMBOL(mlxsw_core_read_frc_h); 2463 2464 u32 mlxsw_core_read_frc_l(struct mlxsw_core *mlxsw_core) 2465 { 2466 return mlxsw_core->bus->read_frc_l(mlxsw_core->bus_priv); 2467 } 2468 EXPORT_SYMBOL(mlxsw_core_read_frc_l); 2469 2470 void mlxsw_core_emad_string_tlv_enable(struct mlxsw_core *mlxsw_core) 2471 { 2472 mlxsw_core->emad.enable_string_tlv = true; 2473 } 2474 EXPORT_SYMBOL(mlxsw_core_emad_string_tlv_enable); 2475 2476 static int __init mlxsw_core_module_init(void) 2477 { 2478 int err; 2479 2480 mlxsw_wq = alloc_workqueue(mlxsw_core_driver_name, 0, 0); 2481 if (!mlxsw_wq) 2482 return -ENOMEM; 2483 mlxsw_owq = alloc_ordered_workqueue("%s_ordered", 0, 2484 mlxsw_core_driver_name); 2485 if (!mlxsw_owq) { 2486 err = -ENOMEM; 2487 goto err_alloc_ordered_workqueue; 2488 } 2489 return 0; 2490 2491 err_alloc_ordered_workqueue: 2492 destroy_workqueue(mlxsw_wq); 2493 return err; 2494 } 2495 2496 static void __exit mlxsw_core_module_exit(void) 2497 { 2498 destroy_workqueue(mlxsw_owq); 2499 destroy_workqueue(mlxsw_wq); 2500 } 2501 2502 module_init(mlxsw_core_module_init); 2503 module_exit(mlxsw_core_module_exit); 2504 2505 MODULE_LICENSE("Dual BSD/GPL"); 2506 MODULE_AUTHOR("Jiri Pirko <jiri@mellanox.com>"); 2507 MODULE_DESCRIPTION("Mellanox switch device core driver"); 2508