drivers/net/ethernet/mellanox/mlxsw/core.c

   1 // SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
   2 /* Copyright (c) 2015-2018 Mellanox Technologies. All rights reserved */
   3
   4 #include <linux/kernel.h>
   5 #include <linux/module.h>
   6 #include <linux/device.h>
   7 #include <linux/export.h>
   8 #include <linux/err.h>
   9 #include <linux/if_link.h>
  10 #include <linux/netdevice.h>
  11 #include <linux/completion.h>
  12 #include <linux/skbuff.h>
  13 #include <linux/etherdevice.h>
  14 #include <linux/types.h>
  15 #include <linux/string.h>
  16 #include <linux/gfp.h>
  17 #include <linux/random.h>
  18 #include <linux/jiffies.h>
  19 #include <linux/mutex.h>
  20 #include <linux/rcupdate.h>
  21 #include <linux/slab.h>
  22 #include <linux/workqueue.h>
  23 #include <asm/byteorder.h>
  24 #include <net/devlink.h>
  25 #include <trace/events/devlink.h>
  26
  27 #include "core.h"
  28 #include "item.h"
  29 #include "cmd.h"
  30 #include "port.h"
  31 #include "trap.h"
  32 #include "emad.h"
  33 #include "reg.h"
  34 #include "resources.h"
  35
  36 static LIST_HEAD(mlxsw_core_driver_list);
  37 static DEFINE_SPINLOCK(mlxsw_core_driver_list_lock);
  38
  39 static const char mlxsw_core_driver_name[] = "mlxsw_core";
  40
  41 static struct workqueue_struct *mlxsw_wq;
  42 static struct workqueue_struct *mlxsw_owq;
  43
  44 struct mlxsw_core_port {
  45         struct devlink_port devlink_port;
  46         void *port_driver_priv;
  47         u8 local_port;
  48 };
  49
  50 void *mlxsw_core_port_driver_priv(struct mlxsw_core_port *mlxsw_core_port)
  51 {
  52         return mlxsw_core_port->port_driver_priv;
  53 }
  54 EXPORT_SYMBOL(mlxsw_core_port_driver_priv);
  55
  56 static bool mlxsw_core_port_check(struct mlxsw_core_port *mlxsw_core_port)
  57 {
  58         return mlxsw_core_port->port_driver_priv != NULL;
  59 }
  60
  61 struct mlxsw_core {
  62         struct mlxsw_driver *driver;
  63         const struct mlxsw_bus *bus;
  64         void *bus_priv;
  65         const struct mlxsw_bus_info *bus_info;
  66         struct workqueue_struct *emad_wq;
  67         struct list_head rx_listener_list;
  68         struct list_head event_listener_list;
  69         struct {
  70                 atomic64_t tid;
  71                 struct list_head trans_list;
  72                 spinlock_t trans_list_lock; /* protects trans_list writes */
  73                 bool use_emad;
  74         } emad;
  75         struct {
  76                 u8 *mapping; /* lag_id+port_index to local_port mapping */
  77         } lag;
  78         struct mlxsw_res res;
  79         struct mlxsw_hwmon *hwmon;
  80         struct mlxsw_thermal *thermal;
  81         struct mlxsw_core_port *ports;
  82         unsigned int max_ports;
  83         bool reload_fail;
  84         bool fw_flash_in_progress;
  85         unsigned long driver_priv[0];
  86         /* driver_priv has to be always the last item */
  87 };
  88
  89 #define MLXSW_PORT_MAX_PORTS_DEFAULT    0x40
  90
  91 static int mlxsw_ports_init(struct mlxsw_core *mlxsw_core)
  92 {
  93         /* Switch ports are numbered from 1 to queried value */
  94         if (MLXSW_CORE_RES_VALID(mlxsw_core, MAX_SYSTEM_PORT))
  95                 mlxsw_core->max_ports = MLXSW_CORE_RES_GET(mlxsw_core,
  96                                                            MAX_SYSTEM_PORT) + 1;
  97         else
  98                 mlxsw_core->max_ports = MLXSW_PORT_MAX_PORTS_DEFAULT + 1;
  99
 100         mlxsw_core->ports = kcalloc(mlxsw_core->max_ports,
 101                                     sizeof(struct mlxsw_core_port), GFP_KERNEL);
 102         if (!mlxsw_core->ports)
 103                 return -ENOMEM;
 104
 105         return 0;
 106 }
 107
 108 static void mlxsw_ports_fini(struct mlxsw_core *mlxsw_core)
 109 {
 110         kfree(mlxsw_core->ports);
 111 }
 112
 113 unsigned int mlxsw_core_max_ports(const struct mlxsw_core *mlxsw_core)
 114 {
 115         return mlxsw_core->max_ports;
 116 }
 117 EXPORT_SYMBOL(mlxsw_core_max_ports);
 118
 119 void *mlxsw_core_driver_priv(struct mlxsw_core *mlxsw_core)
 120 {
 121         return mlxsw_core->driver_priv;
 122 }
 123 EXPORT_SYMBOL(mlxsw_core_driver_priv);
 124
 125 struct mlxsw_rx_listener_item {
 126         struct list_head list;
 127         struct mlxsw_rx_listener rxl;
 128         void *priv;
 129 };
 130
 131 struct mlxsw_event_listener_item {
 132         struct list_head list;
 133         struct mlxsw_event_listener el;
 134         void *priv;
 135 };
 136
 137 /******************
 138  * EMAD processing
 139  ******************/
 140
 141 /* emad_eth_hdr_dmac
 142  * Destination MAC in EMAD's Ethernet header.
 143  * Must be set to 01:02:c9:00:00:01
 144  */
 145 MLXSW_ITEM_BUF(emad, eth_hdr, dmac, 0x00, 6);
 146
 147 /* emad_eth_hdr_smac
 148  * Source MAC in EMAD's Ethernet header.
 149  * Must be set to 00:02:c9:01:02:03
 150  */
 151 MLXSW_ITEM_BUF(emad, eth_hdr, smac, 0x06, 6);
 152
 153 /* emad_eth_hdr_ethertype
 154  * Ethertype in EMAD's Ethernet header.
 155  * Must be set to 0x8932
 156  */
 157 MLXSW_ITEM32(emad, eth_hdr, ethertype, 0x0C, 16, 16);
 158
 159 /* emad_eth_hdr_mlx_proto
 160  * Mellanox protocol.
 161  * Must be set to 0x0.
 162  */
 163 MLXSW_ITEM32(emad, eth_hdr, mlx_proto, 0x0C, 8, 8);
 164
 165 /* emad_eth_hdr_ver
 166  * Mellanox protocol version.
 167  * Must be set to 0x0.
 168  */
 169 MLXSW_ITEM32(emad, eth_hdr, ver, 0x0C, 4, 4);
 170
 171 /* emad_op_tlv_type
 172  * Type of the TLV.
 173  * Must be set to 0x1 (operation TLV).
 174  */
 175 MLXSW_ITEM32(emad, op_tlv, type, 0x00, 27, 5);
 176
 177 /* emad_op_tlv_len
 178  * Length of the operation TLV in u32.
 179  * Must be set to 0x4.
 180  */
 181 MLXSW_ITEM32(emad, op_tlv, len, 0x00, 16, 11);
 182
 183 /* emad_op_tlv_dr
 184  * Direct route bit. Setting to 1 indicates the EMAD is a direct route
 185  * EMAD. DR TLV must follow.
 186  *
 187  * Note: Currently not supported and must not be set.
 188  */
 189 MLXSW_ITEM32(emad, op_tlv, dr, 0x00, 15, 1);
 190
 191 /* emad_op_tlv_status
 192  * Returned status in case of EMAD response. Must be set to 0 in case
 193  * of EMAD request.
 194  * 0x0 - success
 195  * 0x1 - device is busy. Requester should retry
 196  * 0x2 - Mellanox protocol version not supported
 197  * 0x3 - unknown TLV
 198  * 0x4 - register not supported
 199  * 0x5 - operation class not supported
 200  * 0x6 - EMAD method not supported
 201  * 0x7 - bad parameter (e.g. port out of range)
 202  * 0x8 - resource not available
 203  * 0x9 - message receipt acknowledgment. Requester should retry
 204  * 0x70 - internal error
 205  */
 206 MLXSW_ITEM32(emad, op_tlv, status, 0x00, 8, 7);
 207
 208 /* emad_op_tlv_register_id
 209  * Register ID of register within register TLV.
 210  */
 211 MLXSW_ITEM32(emad, op_tlv, register_id, 0x04, 16, 16);
 212
 213 /* emad_op_tlv_r
 214  * Response bit. Setting to 1 indicates Response, otherwise request.
 215  */
 216 MLXSW_ITEM32(emad, op_tlv, r, 0x04, 15, 1);
 217
 218 /* emad_op_tlv_method
 219  * EMAD method type.
 220  * 0x1 - query
 221  * 0x2 - write
 222  * 0x3 - send (currently not supported)
 223  * 0x4 - event
 224  */
 225 MLXSW_ITEM32(emad, op_tlv, method, 0x04, 8, 7);
 226
 227 /* emad_op_tlv_class
 228  * EMAD operation class. Must be set to 0x1 (REG_ACCESS).
 229  */
 230 MLXSW_ITEM32(emad, op_tlv, class, 0x04, 0, 8);
 231
 232 /* emad_op_tlv_tid
 233  * EMAD transaction ID. Used for pairing request and response EMADs.
 234  */
 235 MLXSW_ITEM64(emad, op_tlv, tid, 0x08, 0, 64);
 236
 237 /* emad_reg_tlv_type
 238  * Type of the TLV.
 239  * Must be set to 0x3 (register TLV).
 240  */
 241 MLXSW_ITEM32(emad, reg_tlv, type, 0x00, 27, 5);
 242
 243 /* emad_reg_tlv_len
 244  * Length of the operation TLV in u32.
 245  */
 246 MLXSW_ITEM32(emad, reg_tlv, len, 0x00, 16, 11);
 247
 248 /* emad_end_tlv_type
 249  * Type of the TLV.
 250  * Must be set to 0x0 (end TLV).
 251  */
 252 MLXSW_ITEM32(emad, end_tlv, type, 0x00, 27, 5);
 253
 254 /* emad_end_tlv_len
 255  * Length of the end TLV in u32.
 256  * Must be set to 1.
 257  */
 258 MLXSW_ITEM32(emad, end_tlv, len, 0x00, 16, 11);
 259
 260 enum mlxsw_core_reg_access_type {
 261         MLXSW_CORE_REG_ACCESS_TYPE_QUERY,
 262         MLXSW_CORE_REG_ACCESS_TYPE_WRITE,
 263 };
 264
 265 static inline const char *
 266 mlxsw_core_reg_access_type_str(enum mlxsw_core_reg_access_type type)
 267 {
 268         switch (type) {
 269         case MLXSW_CORE_REG_ACCESS_TYPE_QUERY:
 270                 return "query";
 271         case MLXSW_CORE_REG_ACCESS_TYPE_WRITE:
 272                 return "write";
 273         }
 274         BUG();
 275 }
 276
 277 static void mlxsw_emad_pack_end_tlv(char *end_tlv)
 278 {
 279         mlxsw_emad_end_tlv_type_set(end_tlv, MLXSW_EMAD_TLV_TYPE_END);
 280         mlxsw_emad_end_tlv_len_set(end_tlv, MLXSW_EMAD_END_TLV_LEN);
 281 }
 282
 283 static void mlxsw_emad_pack_reg_tlv(char *reg_tlv,
 284                                     const struct mlxsw_reg_info *reg,
 285                                     char *payload)
 286 {
 287         mlxsw_emad_reg_tlv_type_set(reg_tlv, MLXSW_EMAD_TLV_TYPE_REG);
 288         mlxsw_emad_reg_tlv_len_set(reg_tlv, reg->len / sizeof(u32) + 1);
 289         memcpy(reg_tlv + sizeof(u32), payload, reg->len);
 290 }
 291
 292 static void mlxsw_emad_pack_op_tlv(char *op_tlv,
 293                                    const struct mlxsw_reg_info *reg,
 294                                    enum mlxsw_core_reg_access_type type,
 295                                    u64 tid)
 296 {
 297         mlxsw_emad_op_tlv_type_set(op_tlv, MLXSW_EMAD_TLV_TYPE_OP);
 298         mlxsw_emad_op_tlv_len_set(op_tlv, MLXSW_EMAD_OP_TLV_LEN);
 299         mlxsw_emad_op_tlv_dr_set(op_tlv, 0);
 300         mlxsw_emad_op_tlv_status_set(op_tlv, 0);
 301         mlxsw_emad_op_tlv_register_id_set(op_tlv, reg->id);
 302         mlxsw_emad_op_tlv_r_set(op_tlv, MLXSW_EMAD_OP_TLV_REQUEST);
 303         if (type == MLXSW_CORE_REG_ACCESS_TYPE_QUERY)
 304                 mlxsw_emad_op_tlv_method_set(op_tlv,
 305                                              MLXSW_EMAD_OP_TLV_METHOD_QUERY);
 306         else
 307                 mlxsw_emad_op_tlv_method_set(op_tlv,
 308                                              MLXSW_EMAD_OP_TLV_METHOD_WRITE);
 309         mlxsw_emad_op_tlv_class_set(op_tlv,
 310                                     MLXSW_EMAD_OP_TLV_CLASS_REG_ACCESS);
 311         mlxsw_emad_op_tlv_tid_set(op_tlv, tid);
 312 }
 313
 314 static int mlxsw_emad_construct_eth_hdr(struct sk_buff *skb)
 315 {
 316         char *eth_hdr = skb_push(skb, MLXSW_EMAD_ETH_HDR_LEN);
 317
 318         mlxsw_emad_eth_hdr_dmac_memcpy_to(eth_hdr, MLXSW_EMAD_EH_DMAC);
 319         mlxsw_emad_eth_hdr_smac_memcpy_to(eth_hdr, MLXSW_EMAD_EH_SMAC);
 320         mlxsw_emad_eth_hdr_ethertype_set(eth_hdr, MLXSW_EMAD_EH_ETHERTYPE);
 321         mlxsw_emad_eth_hdr_mlx_proto_set(eth_hdr, MLXSW_EMAD_EH_MLX_PROTO);
 322         mlxsw_emad_eth_hdr_ver_set(eth_hdr, MLXSW_EMAD_EH_PROTO_VERSION);
 323
 324         skb_reset_mac_header(skb);
 325
 326         return 0;
 327 }
 328
 329 static void mlxsw_emad_construct(struct sk_buff *skb,
 330                                  const struct mlxsw_reg_info *reg,
 331                                  char *payload,
 332                                  enum mlxsw_core_reg_access_type type,
 333                                  u64 tid)
 334 {
 335         char *buf;
 336
 337         buf = skb_push(skb, MLXSW_EMAD_END_TLV_LEN * sizeof(u32));
 338         mlxsw_emad_pack_end_tlv(buf);
 339
 340         buf = skb_push(skb, reg->len + sizeof(u32));
 341         mlxsw_emad_pack_reg_tlv(buf, reg, payload);
 342
 343         buf = skb_push(skb, MLXSW_EMAD_OP_TLV_LEN * sizeof(u32));
 344         mlxsw_emad_pack_op_tlv(buf, reg, type, tid);
 345
 346         mlxsw_emad_construct_eth_hdr(skb);
 347 }
 348
 349 static char *mlxsw_emad_op_tlv(const struct sk_buff *skb)
 350 {
 351         return ((char *) (skb->data + MLXSW_EMAD_ETH_HDR_LEN));
 352 }
 353
 354 static char *mlxsw_emad_reg_tlv(const struct sk_buff *skb)
 355 {
 356         return ((char *) (skb->data + MLXSW_EMAD_ETH_HDR_LEN +
 357                                       MLXSW_EMAD_OP_TLV_LEN * sizeof(u32)));
 358 }
 359
 360 static char *mlxsw_emad_reg_payload(const char *op_tlv)
 361 {
 362         return ((char *) (op_tlv + (MLXSW_EMAD_OP_TLV_LEN + 1) * sizeof(u32)));
 363 }
 364
 365 static u64 mlxsw_emad_get_tid(const struct sk_buff *skb)
 366 {
 367         char *op_tlv;
 368
 369         op_tlv = mlxsw_emad_op_tlv(skb);
 370         return mlxsw_emad_op_tlv_tid_get(op_tlv);
 371 }
 372
 373 static bool mlxsw_emad_is_resp(const struct sk_buff *skb)
 374 {
 375         char *op_tlv;
 376
 377         op_tlv = mlxsw_emad_op_tlv(skb);
 378         return (mlxsw_emad_op_tlv_r_get(op_tlv) == MLXSW_EMAD_OP_TLV_RESPONSE);
 379 }
 380
 381 static int mlxsw_emad_process_status(char *op_tlv,
 382                                      enum mlxsw_emad_op_tlv_status *p_status)
 383 {
 384         *p_status = mlxsw_emad_op_tlv_status_get(op_tlv);
 385
 386         switch (*p_status) {
 387         case MLXSW_EMAD_OP_TLV_STATUS_SUCCESS:
 388                 return 0;
 389         case MLXSW_EMAD_OP_TLV_STATUS_BUSY:
 390         case MLXSW_EMAD_OP_TLV_STATUS_MESSAGE_RECEIPT_ACK:
 391                 return -EAGAIN;
 392         case MLXSW_EMAD_OP_TLV_STATUS_VERSION_NOT_SUPPORTED:
 393         case MLXSW_EMAD_OP_TLV_STATUS_UNKNOWN_TLV:
 394         case MLXSW_EMAD_OP_TLV_STATUS_REGISTER_NOT_SUPPORTED:
 395         case MLXSW_EMAD_OP_TLV_STATUS_CLASS_NOT_SUPPORTED:
 396         case MLXSW_EMAD_OP_TLV_STATUS_METHOD_NOT_SUPPORTED:
 397         case MLXSW_EMAD_OP_TLV_STATUS_BAD_PARAMETER:
 398         case MLXSW_EMAD_OP_TLV_STATUS_RESOURCE_NOT_AVAILABLE:
 399         case MLXSW_EMAD_OP_TLV_STATUS_INTERNAL_ERROR:
 400         default:
 401                 return -EIO;
 402         }
 403 }
 404
 405 static int
 406 mlxsw_emad_process_status_skb(struct sk_buff *skb,
 407                               enum mlxsw_emad_op_tlv_status *p_status)
 408 {
 409         return mlxsw_emad_process_status(mlxsw_emad_op_tlv(skb), p_status);
 410 }
 411
 412 struct mlxsw_reg_trans {
 413         struct list_head list;
 414         struct list_head bulk_list;
 415         struct mlxsw_core *core;
 416         struct sk_buff *tx_skb;
 417         struct mlxsw_tx_info tx_info;
 418         struct delayed_work timeout_dw;
 419         unsigned int retries;
 420         u64 tid;
 421         struct completion completion;
 422         atomic_t active;
 423         mlxsw_reg_trans_cb_t *cb;
 424         unsigned long cb_priv;
 425         const struct mlxsw_reg_info *reg;
 426         enum mlxsw_core_reg_access_type type;
 427         int err;
 428         enum mlxsw_emad_op_tlv_status emad_status;
 429         struct rcu_head rcu;
 430 };
 431
 432 #define MLXSW_EMAD_TIMEOUT_DURING_FW_FLASH_MS   3000
 433 #define MLXSW_EMAD_TIMEOUT_MS                   200
 434
 435 static void mlxsw_emad_trans_timeout_schedule(struct mlxsw_reg_trans *trans)
 436 {
 437         unsigned long timeout = msecs_to_jiffies(MLXSW_EMAD_TIMEOUT_MS);
 438
 439         if (trans->core->fw_flash_in_progress)
 440                 timeout = msecs_to_jiffies(MLXSW_EMAD_TIMEOUT_DURING_FW_FLASH_MS);
 441
 442         queue_delayed_work(trans->core->emad_wq, &trans->timeout_dw, timeout);
 443 }
 444
 445 static int mlxsw_emad_transmit(struct mlxsw_core *mlxsw_core,
 446                                struct mlxsw_reg_trans *trans)
 447 {
 448         struct sk_buff *skb;
 449         int err;
 450
 451         skb = skb_copy(trans->tx_skb, GFP_KERNEL);
 452         if (!skb)
 453                 return -ENOMEM;
 454
 455         trace_devlink_hwmsg(priv_to_devlink(mlxsw_core), false, 0,
 456                             skb->data + mlxsw_core->driver->txhdr_len,
 457                             skb->len - mlxsw_core->driver->txhdr_len);
 458
 459         atomic_set(&trans->active, 1);
 460         err = mlxsw_core_skb_transmit(mlxsw_core, skb, &trans->tx_info);
 461         if (err) {
 462                 dev_kfree_skb(skb);
 463                 return err;
 464         }
 465         mlxsw_emad_trans_timeout_schedule(trans);
 466         return 0;
 467 }
 468
 469 static void mlxsw_emad_trans_finish(struct mlxsw_reg_trans *trans, int err)
 470 {
 471         struct mlxsw_core *mlxsw_core = trans->core;
 472
 473         dev_kfree_skb(trans->tx_skb);
 474         spin_lock_bh(&mlxsw_core->emad.trans_list_lock);
 475         list_del_rcu(&trans->list);
 476         spin_unlock_bh(&mlxsw_core->emad.trans_list_lock);
 477         trans->err = err;
 478         complete(&trans->completion);
 479 }
 480
 481 static void mlxsw_emad_transmit_retry(struct mlxsw_core *mlxsw_core,
 482                                       struct mlxsw_reg_trans *trans)
 483 {
 484         int err;
 485
 486         if (trans->retries < MLXSW_EMAD_MAX_RETRY) {
 487                 trans->retries++;
 488                 err = mlxsw_emad_transmit(trans->core, trans);
 489                 if (err == 0)
 490                         return;
 491         } else {
 492                 err = -EIO;
 493         }
 494         mlxsw_emad_trans_finish(trans, err);
 495 }
 496
 497 static void mlxsw_emad_trans_timeout_work(struct work_struct *work)
 498 {
 499         struct mlxsw_reg_trans *trans = container_of(work,
 500                                                      struct mlxsw_reg_trans,
 501                                                      timeout_dw.work);
 502
 503         if (!atomic_dec_and_test(&trans->active))
 504                 return;
 505
 506         mlxsw_emad_transmit_retry(trans->core, trans);
 507 }
 508
 509 static void mlxsw_emad_process_response(struct mlxsw_core *mlxsw_core,
 510                                         struct mlxsw_reg_trans *trans,
 511                                         struct sk_buff *skb)
 512 {
 513         int err;
 514
 515         if (!atomic_dec_and_test(&trans->active))
 516                 return;
 517
 518         err = mlxsw_emad_process_status_skb(skb, &trans->emad_status);
 519         if (err == -EAGAIN) {
 520                 mlxsw_emad_transmit_retry(mlxsw_core, trans);
 521         } else {
 522                 if (err == 0) {
 523                         char *op_tlv = mlxsw_emad_op_tlv(skb);
 524
 525                         if (trans->cb)
 526                                 trans->cb(mlxsw_core,
 527                                           mlxsw_emad_reg_payload(op_tlv),
 528                                           trans->reg->len, trans->cb_priv);
 529                 }
 530                 mlxsw_emad_trans_finish(trans, err);
 531         }
 532 }
 533
 534 /* called with rcu read lock held */
 535 static void mlxsw_emad_rx_listener_func(struct sk_buff *skb, u8 local_port,
 536                                         void *priv)
 537 {
 538         struct mlxsw_core *mlxsw_core = priv;
 539         struct mlxsw_reg_trans *trans;
 540
 541         trace_devlink_hwmsg(priv_to_devlink(mlxsw_core), true, 0,
 542                             skb->data, skb->len);
 543
 544         if (!mlxsw_emad_is_resp(skb))
 545                 goto free_skb;
 546
 547         list_for_each_entry_rcu(trans, &mlxsw_core->emad.trans_list, list) {
 548                 if (mlxsw_emad_get_tid(skb) == trans->tid) {
 549                         mlxsw_emad_process_response(mlxsw_core, trans, skb);
 550                         break;
 551                 }
 552         }
 553
 554 free_skb:
 555         dev_kfree_skb(skb);
 556 }
 557
 558 static const struct mlxsw_listener mlxsw_emad_rx_listener =
 559         MLXSW_RXL(mlxsw_emad_rx_listener_func, ETHEMAD, TRAP_TO_CPU, false,
 560                   EMAD, DISCARD);
 561
 562 static int mlxsw_emad_init(struct mlxsw_core *mlxsw_core)
 563 {
 564         struct workqueue_struct *emad_wq;
 565         u64 tid;
 566         int err;
 567
 568         if (!(mlxsw_core->bus->features & MLXSW_BUS_F_TXRX))
 569                 return 0;
 570
 571         emad_wq = alloc_workqueue("mlxsw_core_emad", 0, 0);
 572         if (!emad_wq)
 573                 return -ENOMEM;
 574         mlxsw_core->emad_wq = emad_wq;
 575
 576         /* Set the upper 32 bits of the transaction ID field to a random
 577          * number. This allows us to discard EMADs addressed to other
 578          * devices.
 579          */
 580         get_random_bytes(&tid, 4);
 581         tid <<= 32;
 582         atomic64_set(&mlxsw_core->emad.tid, tid);
 583
 584         INIT_LIST_HEAD(&mlxsw_core->emad.trans_list);
 585         spin_lock_init(&mlxsw_core->emad.trans_list_lock);
 586
 587         err = mlxsw_core_trap_register(mlxsw_core, &mlxsw_emad_rx_listener,
 588                                        mlxsw_core);
 589         if (err)
 590                 return err;
 591
 592         err = mlxsw_core->driver->basic_trap_groups_set(mlxsw_core);
 593         if (err)
 594                 goto err_emad_trap_set;
 595         mlxsw_core->emad.use_emad = true;
 596
 597         return 0;
 598
 599 err_emad_trap_set:
 600         mlxsw_core_trap_unregister(mlxsw_core, &mlxsw_emad_rx_listener,
 601                                    mlxsw_core);
 602         destroy_workqueue(mlxsw_core->emad_wq);
 603         return err;
 604 }
 605
 606 static void mlxsw_emad_fini(struct mlxsw_core *mlxsw_core)
 607 {
 608
 609         if (!(mlxsw_core->bus->features & MLXSW_BUS_F_TXRX))
 610                 return;
 611
 612         mlxsw_core->emad.use_emad = false;
 613         mlxsw_core_trap_unregister(mlxsw_core, &mlxsw_emad_rx_listener,
 614                                    mlxsw_core);
 615         destroy_workqueue(mlxsw_core->emad_wq);
 616 }
 617
 618 static struct sk_buff *mlxsw_emad_alloc(const struct mlxsw_core *mlxsw_core,
 619                                         u16 reg_len)
 620 {
 621         struct sk_buff *skb;
 622         u16 emad_len;
 623
 624         emad_len = (reg_len + sizeof(u32) + MLXSW_EMAD_ETH_HDR_LEN +
 625                     (MLXSW_EMAD_OP_TLV_LEN + MLXSW_EMAD_END_TLV_LEN) *
 626                     sizeof(u32) + mlxsw_core->driver->txhdr_len);
 627         if (emad_len > MLXSW_EMAD_MAX_FRAME_LEN)
 628                 return NULL;
 629
 630         skb = netdev_alloc_skb(NULL, emad_len);
 631         if (!skb)
 632                 return NULL;
 633         memset(skb->data, 0, emad_len);
 634         skb_reserve(skb, emad_len);
 635
 636         return skb;
 637 }
 638
 639 static int mlxsw_emad_reg_access(struct mlxsw_core *mlxsw_core,
 640                                  const struct mlxsw_reg_info *reg,
 641                                  char *payload,
 642                                  enum mlxsw_core_reg_access_type type,
 643                                  struct mlxsw_reg_trans *trans,
 644                                  struct list_head *bulk_list,
 645                                  mlxsw_reg_trans_cb_t *cb,
 646                                  unsigned long cb_priv, u64 tid)
 647 {
 648         struct sk_buff *skb;
 649         int err;
 650
 651         dev_dbg(mlxsw_core->bus_info->dev, "EMAD reg access (tid=%llx,reg_id=%x(%s),type=%s)\n",
 652                 tid, reg->id, mlxsw_reg_id_str(reg->id),
 653                 mlxsw_core_reg_access_type_str(type));
 654
 655         skb = mlxsw_emad_alloc(mlxsw_core, reg->len);
 656         if (!skb)
 657                 return -ENOMEM;
 658
 659         list_add_tail(&trans->bulk_list, bulk_list);
 660         trans->core = mlxsw_core;
 661         trans->tx_skb = skb;
 662         trans->tx_info.local_port = MLXSW_PORT_CPU_PORT;
 663         trans->tx_info.is_emad = true;
 664         INIT_DELAYED_WORK(&trans->timeout_dw, mlxsw_emad_trans_timeout_work);
 665         trans->tid = tid;
 666         init_completion(&trans->completion);
 667         trans->cb = cb;
 668         trans->cb_priv = cb_priv;
 669         trans->reg = reg;
 670         trans->type = type;
 671
 672         mlxsw_emad_construct(skb, reg, payload, type, trans->tid);
 673         mlxsw_core->driver->txhdr_construct(skb, &trans->tx_info);
 674
 675         spin_lock_bh(&mlxsw_core->emad.trans_list_lock);
 676         list_add_tail_rcu(&trans->list, &mlxsw_core->emad.trans_list);
 677         spin_unlock_bh(&mlxsw_core->emad.trans_list_lock);
 678         err = mlxsw_emad_transmit(mlxsw_core, trans);
 679         if (err)
 680                 goto err_out;
 681         return 0;
 682
 683 err_out:
 684         spin_lock_bh(&mlxsw_core->emad.trans_list_lock);
 685         list_del_rcu(&trans->list);
 686         spin_unlock_bh(&mlxsw_core->emad.trans_list_lock);
 687         list_del(&trans->bulk_list);
 688         dev_kfree_skb(trans->tx_skb);
 689         return err;
 690 }
 691
 692 /*****************
 693  * Core functions
 694  *****************/
 695
 696 int mlxsw_core_driver_register(struct mlxsw_driver *mlxsw_driver)
 697 {
 698         spin_lock(&mlxsw_core_driver_list_lock);
 699         list_add_tail(&mlxsw_driver->list, &mlxsw_core_driver_list);
 700         spin_unlock(&mlxsw_core_driver_list_lock);
 701         return 0;
 702 }
 703 EXPORT_SYMBOL(mlxsw_core_driver_register);
 704
 705 void mlxsw_core_driver_unregister(struct mlxsw_driver *mlxsw_driver)
 706 {
 707         spin_lock(&mlxsw_core_driver_list_lock);
 708         list_del(&mlxsw_driver->list);
 709         spin_unlock(&mlxsw_core_driver_list_lock);
 710 }
 711 EXPORT_SYMBOL(mlxsw_core_driver_unregister);
 712
 713 static struct mlxsw_driver *__driver_find(const char *kind)
 714 {
 715         struct mlxsw_driver *mlxsw_driver;
 716
 717         list_for_each_entry(mlxsw_driver, &mlxsw_core_driver_list, list) {
 718                 if (strcmp(mlxsw_driver->kind, kind) == 0)
 719                         return mlxsw_driver;
 720         }
 721         return NULL;
 722 }
 723
 724 static struct mlxsw_driver *mlxsw_core_driver_get(const char *kind)
 725 {
 726         struct mlxsw_driver *mlxsw_driver;
 727
 728         spin_lock(&mlxsw_core_driver_list_lock);
 729         mlxsw_driver = __driver_find(kind);
 730         spin_unlock(&mlxsw_core_driver_list_lock);
 731         return mlxsw_driver;
 732 }
 733
 734 static int mlxsw_devlink_port_split(struct devlink *devlink,
 735                                     unsigned int port_index,
 736                                     unsigned int count,
 737                                     struct netlink_ext_ack *extack)
 738 {
 739         struct mlxsw_core *mlxsw_core = devlink_priv(devlink);
 740
 741         if (port_index >= mlxsw_core->max_ports) {
 742                 NL_SET_ERR_MSG_MOD(extack, "Port index exceeds maximum number of ports");
 743                 return -EINVAL;
 744         }
 745         if (!mlxsw_core->driver->port_split)
 746                 return -EOPNOTSUPP;
 747         return mlxsw_core->driver->port_split(mlxsw_core, port_index, count,
 748                                               extack);
 749 }
 750
 751 static int mlxsw_devlink_port_unsplit(struct devlink *devlink,
 752                                       unsigned int port_index,
 753                                       struct netlink_ext_ack *extack)
 754 {
 755         struct mlxsw_core *mlxsw_core = devlink_priv(devlink);
 756
 757         if (port_index >= mlxsw_core->max_ports) {
 758                 NL_SET_ERR_MSG_MOD(extack, "Port index exceeds maximum number of ports");
 759                 return -EINVAL;
 760         }
 761         if (!mlxsw_core->driver->port_unsplit)
 762                 return -EOPNOTSUPP;
 763         return mlxsw_core->driver->port_unsplit(mlxsw_core, port_index,
 764                                                 extack);
 765 }
 766
 767 static int
 768 mlxsw_devlink_sb_pool_get(struct devlink *devlink,
 769                           unsigned int sb_index, u16 pool_index,
 770                           struct devlink_sb_pool_info *pool_info)
 771 {
 772         struct mlxsw_core *mlxsw_core = devlink_priv(devlink);
 773         struct mlxsw_driver *mlxsw_driver = mlxsw_core->driver;
 774
 775         if (!mlxsw_driver->sb_pool_get)
 776                 return -EOPNOTSUPP;
 777         return mlxsw_driver->sb_pool_get(mlxsw_core, sb_index,
 778                                          pool_index, pool_info);
 779 }
 780
 781 static int
 782 mlxsw_devlink_sb_pool_set(struct devlink *devlink,
 783                           unsigned int sb_index, u16 pool_index, u32 size,
 784                           enum devlink_sb_threshold_type threshold_type,
 785                           struct netlink_ext_ack *extack)
 786 {
 787         struct mlxsw_core *mlxsw_core = devlink_priv(devlink);
 788         struct mlxsw_driver *mlxsw_driver = mlxsw_core->driver;
 789
 790         if (!mlxsw_driver->sb_pool_set)
 791                 return -EOPNOTSUPP;
 792         return mlxsw_driver->sb_pool_set(mlxsw_core, sb_index,
 793                                          pool_index, size, threshold_type);
 794 }
 795
 796 static void *__dl_port(struct devlink_port *devlink_port)
 797 {
 798         return container_of(devlink_port, struct mlxsw_core_port, devlink_port);
 799 }
 800
 801 static int mlxsw_devlink_port_type_set(struct devlink_port *devlink_port,
 802                                        enum devlink_port_type port_type)
 803 {
 804         struct mlxsw_core *mlxsw_core = devlink_priv(devlink_port->devlink);
 805         struct mlxsw_driver *mlxsw_driver = mlxsw_core->driver;
 806         struct mlxsw_core_port *mlxsw_core_port = __dl_port(devlink_port);
 807
 808         if (!mlxsw_driver->port_type_set)
 809                 return -EOPNOTSUPP;
 810
 811         return mlxsw_driver->port_type_set(mlxsw_core,
 812                                            mlxsw_core_port->local_port,
 813                                            port_type);
 814 }
 815
 816 static int mlxsw_devlink_sb_port_pool_get(struct devlink_port *devlink_port,
 817                                           unsigned int sb_index, u16 pool_index,
 818                                           u32 *p_threshold)
 819 {
 820         struct mlxsw_core *mlxsw_core = devlink_priv(devlink_port->devlink);
 821         struct mlxsw_driver *mlxsw_driver = mlxsw_core->driver;
 822         struct mlxsw_core_port *mlxsw_core_port = __dl_port(devlink_port);
 823
 824         if (!mlxsw_driver->sb_port_pool_get ||
 825             !mlxsw_core_port_check(mlxsw_core_port))
 826                 return -EOPNOTSUPP;
 827         return mlxsw_driver->sb_port_pool_get(mlxsw_core_port, sb_index,
 828                                               pool_index, p_threshold);
 829 }
 830
 831 static int mlxsw_devlink_sb_port_pool_set(struct devlink_port *devlink_port,
 832                                           unsigned int sb_index, u16 pool_index,
 833                                           u32 threshold,
 834                                           struct netlink_ext_ack *extack)
 835 {
 836         struct mlxsw_core *mlxsw_core = devlink_priv(devlink_port->devlink);
 837         struct mlxsw_driver *mlxsw_driver = mlxsw_core->driver;
 838         struct mlxsw_core_port *mlxsw_core_port = __dl_port(devlink_port);
 839
 840         if (!mlxsw_driver->sb_port_pool_set ||
 841             !mlxsw_core_port_check(mlxsw_core_port))
 842                 return -EOPNOTSUPP;
 843         return mlxsw_driver->sb_port_pool_set(mlxsw_core_port, sb_index,
 844                                               pool_index, threshold);
 845 }
 846
 847 static int
 848 mlxsw_devlink_sb_tc_pool_bind_get(struct devlink_port *devlink_port,
 849                                   unsigned int sb_index, u16 tc_index,
 850                                   enum devlink_sb_pool_type pool_type,
 851                                   u16 *p_pool_index, u32 *p_threshold)
 852 {
 853         struct mlxsw_core *mlxsw_core = devlink_priv(devlink_port->devlink);
 854         struct mlxsw_driver *mlxsw_driver = mlxsw_core->driver;
 855         struct mlxsw_core_port *mlxsw_core_port = __dl_port(devlink_port);
 856
 857         if (!mlxsw_driver->sb_tc_pool_bind_get ||
 858             !mlxsw_core_port_check(mlxsw_core_port))
 859                 return -EOPNOTSUPP;
 860         return mlxsw_driver->sb_tc_pool_bind_get(mlxsw_core_port, sb_index,
 861                                                  tc_index, pool_type,
 862                                                  p_pool_index, p_threshold);
 863 }
 864
 865 static int
 866 mlxsw_devlink_sb_tc_pool_bind_set(struct devlink_port *devlink_port,
 867                                   unsigned int sb_index, u16 tc_index,
 868                                   enum devlink_sb_pool_type pool_type,
 869                                   u16 pool_index, u32 threshold,
 870                                   struct netlink_ext_ack *extack)
 871 {
 872         struct mlxsw_core *mlxsw_core = devlink_priv(devlink_port->devlink);
 873         struct mlxsw_driver *mlxsw_driver = mlxsw_core->driver;
 874         struct mlxsw_core_port *mlxsw_core_port = __dl_port(devlink_port);
 875
 876         if (!mlxsw_driver->sb_tc_pool_bind_set ||
 877             !mlxsw_core_port_check(mlxsw_core_port))
 878                 return -EOPNOTSUPP;
 879         return mlxsw_driver->sb_tc_pool_bind_set(mlxsw_core_port, sb_index,
 880                                                  tc_index, pool_type,
 881                                                  pool_index, threshold);
 882 }
 883
 884 static int mlxsw_devlink_sb_occ_snapshot(struct devlink *devlink,
 885                                          unsigned int sb_index)
 886 {
 887         struct mlxsw_core *mlxsw_core = devlink_priv(devlink);
 888         struct mlxsw_driver *mlxsw_driver = mlxsw_core->driver;
 889
 890         if (!mlxsw_driver->sb_occ_snapshot)
 891                 return -EOPNOTSUPP;
 892         return mlxsw_driver->sb_occ_snapshot(mlxsw_core, sb_index);
 893 }
 894
 895 static int mlxsw_devlink_sb_occ_max_clear(struct devlink *devlink,
 896                                           unsigned int sb_index)
 897 {
 898         struct mlxsw_core *mlxsw_core = devlink_priv(devlink);
 899         struct mlxsw_driver *mlxsw_driver = mlxsw_core->driver;
 900
 901         if (!mlxsw_driver->sb_occ_max_clear)
 902                 return -EOPNOTSUPP;
 903         return mlxsw_driver->sb_occ_max_clear(mlxsw_core, sb_index);
 904 }
 905
 906 static int
 907 mlxsw_devlink_sb_occ_port_pool_get(struct devlink_port *devlink_port,
 908                                    unsigned int sb_index, u16 pool_index,
 909                                    u32 *p_cur, u32 *p_max)
 910 {
 911         struct mlxsw_core *mlxsw_core = devlink_priv(devlink_port->devlink);
 912         struct mlxsw_driver *mlxsw_driver = mlxsw_core->driver;
 913         struct mlxsw_core_port *mlxsw_core_port = __dl_port(devlink_port);
 914
 915         if (!mlxsw_driver->sb_occ_port_pool_get ||
 916             !mlxsw_core_port_check(mlxsw_core_port))
 917                 return -EOPNOTSUPP;
 918         return mlxsw_driver->sb_occ_port_pool_get(mlxsw_core_port, sb_index,
 919                                                   pool_index, p_cur, p_max);
 920 }
 921
 922 static int
 923 mlxsw_devlink_sb_occ_tc_port_bind_get(struct devlink_port *devlink_port,
 924                                       unsigned int sb_index, u16 tc_index,
 925                                       enum devlink_sb_pool_type pool_type,
 926                                       u32 *p_cur, u32 *p_max)
 927 {
 928         struct mlxsw_core *mlxsw_core = devlink_priv(devlink_port->devlink);
 929         struct mlxsw_driver *mlxsw_driver = mlxsw_core->driver;
 930         struct mlxsw_core_port *mlxsw_core_port = __dl_port(devlink_port);
 931
 932         if (!mlxsw_driver->sb_occ_tc_port_bind_get ||
 933             !mlxsw_core_port_check(mlxsw_core_port))
 934                 return -EOPNOTSUPP;
 935         return mlxsw_driver->sb_occ_tc_port_bind_get(mlxsw_core_port,
 936                                                      sb_index, tc_index,
 937                                                      pool_type, p_cur, p_max);
 938 }
 939
 940 static int
 941 mlxsw_devlink_info_get(struct devlink *devlink, struct devlink_info_req *req,
 942                        struct netlink_ext_ack *extack)
 943 {
 944         struct mlxsw_core *mlxsw_core = devlink_priv(devlink);
 945         char fw_info_psid[MLXSW_REG_MGIR_FW_INFO_PSID_SIZE];
 946         u32 hw_rev, fw_major, fw_minor, fw_sub_minor;
 947         char mgir_pl[MLXSW_REG_MGIR_LEN];
 948         char buf[32];
 949         int err;
 950
 951         err = devlink_info_driver_name_put(req,
 952                                            mlxsw_core->bus_info->device_kind);
 953         if (err)
 954                 return err;
 955
 956         mlxsw_reg_mgir_pack(mgir_pl);
 957         err = mlxsw_reg_query(mlxsw_core, MLXSW_REG(mgir), mgir_pl);
 958         if (err)
 959                 return err;
 960         mlxsw_reg_mgir_unpack(mgir_pl, &hw_rev, fw_info_psid, &fw_major,
 961                               &fw_minor, &fw_sub_minor);
 962
 963         sprintf(buf, "%X", hw_rev);
 964         err = devlink_info_version_fixed_put(req, "hw.revision", buf);
 965         if (err)
 966                 return err;
 967
 968         err = devlink_info_version_fixed_put(req, "fw.psid", fw_info_psid);
 969         if (err)
 970                 return err;
 971
 972         sprintf(buf, "%d.%d.%d", fw_major, fw_minor, fw_sub_minor);
 973         err = devlink_info_version_running_put(req, "fw.version", buf);
 974         if (err)
 975                 return err;
 976
 977         return 0;
 978 }
 979
 980 static int mlxsw_devlink_core_bus_device_reload(struct devlink *devlink,
 981                                                 struct netlink_ext_ack *extack)
 982 {
 983         struct mlxsw_core *mlxsw_core = devlink_priv(devlink);
 984         int err;
 985
 986         if (!(mlxsw_core->bus->features & MLXSW_BUS_F_RESET))
 987                 return -EOPNOTSUPP;
 988
 989         mlxsw_core_bus_device_unregister(mlxsw_core, true);
 990         err = mlxsw_core_bus_device_register(mlxsw_core->bus_info,
 991                                              mlxsw_core->bus,
 992                                              mlxsw_core->bus_priv, true,
 993                                              devlink);
 994         mlxsw_core->reload_fail = !!err;
 995
 996         return err;
 997 }
 998
 999 static const struct devlink_ops mlxsw_devlink_ops = {
1000         .reload                         = mlxsw_devlink_core_bus_device_reload,
1001         .port_type_set                  = mlxsw_devlink_port_type_set,
1002         .port_split                     = mlxsw_devlink_port_split,
1003         .port_unsplit                   = mlxsw_devlink_port_unsplit,
1004         .sb_pool_get                    = mlxsw_devlink_sb_pool_get,
1005         .sb_pool_set                    = mlxsw_devlink_sb_pool_set,
1006         .sb_port_pool_get               = mlxsw_devlink_sb_port_pool_get,
1007         .sb_port_pool_set               = mlxsw_devlink_sb_port_pool_set,
1008         .sb_tc_pool_bind_get            = mlxsw_devlink_sb_tc_pool_bind_get,
1009         .sb_tc_pool_bind_set            = mlxsw_devlink_sb_tc_pool_bind_set,
1010         .sb_occ_snapshot                = mlxsw_devlink_sb_occ_snapshot,
1011         .sb_occ_max_clear               = mlxsw_devlink_sb_occ_max_clear,
1012         .sb_occ_port_pool_get           = mlxsw_devlink_sb_occ_port_pool_get,
1013         .sb_occ_tc_port_bind_get        = mlxsw_devlink_sb_occ_tc_port_bind_get,
1014         .info_get                       = mlxsw_devlink_info_get,
1015 };
1016
1017 static int
1018 __mlxsw_core_bus_device_register(const struct mlxsw_bus_info *mlxsw_bus_info,
1019                                  const struct mlxsw_bus *mlxsw_bus,
1020                                  void *bus_priv, bool reload,
1021                                  struct devlink *devlink)
1022 {
1023         const char *device_kind = mlxsw_bus_info->device_kind;
1024         struct mlxsw_core *mlxsw_core;
1025         struct mlxsw_driver *mlxsw_driver;
1026         struct mlxsw_res *res;
1027         size_t alloc_size;
1028         int err;
1029
1030         mlxsw_driver = mlxsw_core_driver_get(device_kind);
1031         if (!mlxsw_driver)
1032                 return -EINVAL;
1033
1034         if (!reload) {
1035                 alloc_size = sizeof(*mlxsw_core) + mlxsw_driver->priv_size;
1036                 devlink = devlink_alloc(&mlxsw_devlink_ops, alloc_size);
1037                 if (!devlink) {
1038                         err = -ENOMEM;
1039                         goto err_devlink_alloc;
1040                 }
1041         }
1042
1043         mlxsw_core = devlink_priv(devlink);
1044         INIT_LIST_HEAD(&mlxsw_core->rx_listener_list);
1045         INIT_LIST_HEAD(&mlxsw_core->event_listener_list);
1046         mlxsw_core->driver = mlxsw_driver;
1047         mlxsw_core->bus = mlxsw_bus;
1048         mlxsw_core->bus_priv = bus_priv;
1049         mlxsw_core->bus_info = mlxsw_bus_info;
1050
1051         res = mlxsw_driver->res_query_enabled ? &mlxsw_core->res : NULL;
1052         err = mlxsw_bus->init(bus_priv, mlxsw_core, mlxsw_driver->profile, res);
1053         if (err)
1054                 goto err_bus_init;
1055
1056         if (mlxsw_driver->resources_register && !reload) {
1057                 err = mlxsw_driver->resources_register(mlxsw_core);
1058                 if (err)
1059                         goto err_register_resources;
1060         }
1061
1062         err = mlxsw_ports_init(mlxsw_core);
1063         if (err)
1064                 goto err_ports_init;
1065
1066         if (MLXSW_CORE_RES_VALID(mlxsw_core, MAX_LAG) &&
1067             MLXSW_CORE_RES_VALID(mlxsw_core, MAX_LAG_MEMBERS)) {
1068                 alloc_size = sizeof(u8) *
1069                         MLXSW_CORE_RES_GET(mlxsw_core, MAX_LAG) *
1070                         MLXSW_CORE_RES_GET(mlxsw_core, MAX_LAG_MEMBERS);
1071                 mlxsw_core->lag.mapping = kzalloc(alloc_size, GFP_KERNEL);
1072                 if (!mlxsw_core->lag.mapping) {
1073                         err = -ENOMEM;
1074                         goto err_alloc_lag_mapping;
1075                 }
1076         }
1077
1078         err = mlxsw_emad_init(mlxsw_core);
1079         if (err)
1080                 goto err_emad_init;
1081
1082         if (!reload) {
1083                 err = devlink_register(devlink, mlxsw_bus_info->dev);
1084                 if (err)
1085                         goto err_devlink_register;
1086         }
1087
1088         if (mlxsw_driver->params_register && !reload) {
1089                 err = mlxsw_driver->params_register(mlxsw_core);
1090                 if (err)
1091                         goto err_register_params;
1092         }
1093
1094         err = mlxsw_hwmon_init(mlxsw_core, mlxsw_bus_info, &mlxsw_core->hwmon);
1095         if (err)
1096                 goto err_hwmon_init;
1097
1098         err = mlxsw_thermal_init(mlxsw_core, mlxsw_bus_info,
1099                                  &mlxsw_core->thermal);
1100         if (err)
1101                 goto err_thermal_init;
1102
1103         if (mlxsw_driver->init) {
1104                 err = mlxsw_driver->init(mlxsw_core, mlxsw_bus_info);
1105                 if (err)
1106                         goto err_driver_init;
1107         }
1108
1109         if (mlxsw_driver->params_register && !reload)
1110                 devlink_params_publish(devlink);
1111
1112         return 0;
1113
1114 err_driver_init:
1115         mlxsw_thermal_fini(mlxsw_core->thermal);
1116 err_thermal_init:
1117         mlxsw_hwmon_fini(mlxsw_core->hwmon);
1118 err_hwmon_init:
1119         if (mlxsw_driver->params_unregister && !reload)
1120                 mlxsw_driver->params_unregister(mlxsw_core);
1121 err_register_params:
1122         if (!reload)
1123                 devlink_unregister(devlink);
1124 err_devlink_register:
1125         mlxsw_emad_fini(mlxsw_core);
1126 err_emad_init:
1127         kfree(mlxsw_core->lag.mapping);
1128 err_alloc_lag_mapping:
1129         mlxsw_ports_fini(mlxsw_core);
1130 err_ports_init:
1131         if (!reload)
1132                 devlink_resources_unregister(devlink, NULL);
1133 err_register_resources:
1134         mlxsw_bus->fini(bus_priv);
1135 err_bus_init:
1136         if (!reload)
1137                 devlink_free(devlink);
1138 err_devlink_alloc:
1139         return err;
1140 }
1141
1142 int mlxsw_core_bus_device_register(const struct mlxsw_bus_info *mlxsw_bus_info,
1143                                    const struct mlxsw_bus *mlxsw_bus,
1144                                    void *bus_priv, bool reload,
1145                                    struct devlink *devlink)
1146 {
1147         bool called_again = false;
1148         int err;
1149
1150 again:
1151         err = __mlxsw_core_bus_device_register(mlxsw_bus_info, mlxsw_bus,
1152                                                bus_priv, reload, devlink);
1153         /* -EAGAIN is returned in case the FW was updated. FW needs
1154          * a reset, so lets try to call __mlxsw_core_bus_device_register()
1155          * again.
1156          */
1157         if (err == -EAGAIN && !called_again) {
1158                 called_again = true;
1159                 goto again;
1160         }
1161
1162         return err;
1163 }
1164 EXPORT_SYMBOL(mlxsw_core_bus_device_register);
1165
1166 void mlxsw_core_bus_device_unregister(struct mlxsw_core *mlxsw_core,
1167                                       bool reload)
1168 {
1169         struct devlink *devlink = priv_to_devlink(mlxsw_core);
1170
1171         if (mlxsw_core->reload_fail) {
1172                 if (!reload)
1173                         /* Only the parts that were not de-initialized in the
1174                          * failed reload attempt need to be de-initialized.
1175                          */
1176                         goto reload_fail_deinit;
1177                 else
1178                         return;
1179         }
1180
1181         if (mlxsw_core->driver->params_unregister && !reload)
1182                 devlink_params_unpublish(devlink);
1183         if (mlxsw_core->driver->fini)
1184                 mlxsw_core->driver->fini(mlxsw_core);
1185         mlxsw_thermal_fini(mlxsw_core->thermal);
1186         mlxsw_hwmon_fini(mlxsw_core->hwmon);
1187         if (mlxsw_core->driver->params_unregister && !reload)
1188                 mlxsw_core->driver->params_unregister(mlxsw_core);
1189         if (!reload)
1190                 devlink_unregister(devlink);
1191         mlxsw_emad_fini(mlxsw_core);
1192         kfree(mlxsw_core->lag.mapping);
1193         mlxsw_ports_fini(mlxsw_core);
1194         if (!reload)
1195                 devlink_resources_unregister(devlink, NULL);
1196         mlxsw_core->bus->fini(mlxsw_core->bus_priv);
1197
1198         return;
1199
1200 reload_fail_deinit:
1201         if (mlxsw_core->driver->params_unregister)
1202                 mlxsw_core->driver->params_unregister(mlxsw_core);
1203         devlink_unregister(devlink);
1204         devlink_resources_unregister(devlink, NULL);
1205         devlink_free(devlink);
1206 }
1207 EXPORT_SYMBOL(mlxsw_core_bus_device_unregister);
1208
1209 bool mlxsw_core_skb_transmit_busy(struct mlxsw_core *mlxsw_core,
1210                                   const struct mlxsw_tx_info *tx_info)
1211 {
1212         return mlxsw_core->bus->skb_transmit_busy(mlxsw_core->bus_priv,
1213                                                   tx_info);
1214 }
1215 EXPORT_SYMBOL(mlxsw_core_skb_transmit_busy);
1216
1217 int mlxsw_core_skb_transmit(struct mlxsw_core *mlxsw_core, struct sk_buff *skb,
1218                             const struct mlxsw_tx_info *tx_info)
1219 {
1220         return mlxsw_core->bus->skb_transmit(mlxsw_core->bus_priv, skb,
1221                                              tx_info);
1222 }
1223 EXPORT_SYMBOL(mlxsw_core_skb_transmit);
1224
1225 static bool __is_rx_listener_equal(const struct mlxsw_rx_listener *rxl_a,
1226                                    const struct mlxsw_rx_listener *rxl_b)
1227 {
1228         return (rxl_a->func == rxl_b->func &&
1229                 rxl_a->local_port == rxl_b->local_port &&
1230                 rxl_a->trap_id == rxl_b->trap_id);
1231 }
1232
1233 static struct mlxsw_rx_listener_item *
1234 __find_rx_listener_item(struct mlxsw_core *mlxsw_core,
1235                         const struct mlxsw_rx_listener *rxl,
1236                         void *priv)
1237 {
1238         struct mlxsw_rx_listener_item *rxl_item;
1239
1240         list_for_each_entry(rxl_item, &mlxsw_core->rx_listener_list, list) {
1241                 if (__is_rx_listener_equal(&rxl_item->rxl, rxl) &&
1242                     rxl_item->priv == priv)
1243                         return rxl_item;
1244         }
1245         return NULL;
1246 }
1247
1248 int mlxsw_core_rx_listener_register(struct mlxsw_core *mlxsw_core,
1249                                     const struct mlxsw_rx_listener *rxl,
1250                                     void *priv)
1251 {
1252         struct mlxsw_rx_listener_item *rxl_item;
1253
1254         rxl_item = __find_rx_listener_item(mlxsw_core, rxl, priv);
1255         if (rxl_item)
1256                 return -EEXIST;
1257         rxl_item = kmalloc(sizeof(*rxl_item), GFP_KERNEL);
1258         if (!rxl_item)
1259                 return -ENOMEM;
1260         rxl_item->rxl = *rxl;
1261         rxl_item->priv = priv;
1262
1263         list_add_rcu(&rxl_item->list, &mlxsw_core->rx_listener_list);
1264         return 0;
1265 }
1266 EXPORT_SYMBOL(mlxsw_core_rx_listener_register);
1267
1268 void mlxsw_core_rx_listener_unregister(struct mlxsw_core *mlxsw_core,
1269                                        const struct mlxsw_rx_listener *rxl,
1270                                        void *priv)
1271 {
1272         struct mlxsw_rx_listener_item *rxl_item;
1273
1274         rxl_item = __find_rx_listener_item(mlxsw_core, rxl, priv);
1275         if (!rxl_item)
1276                 return;
1277         list_del_rcu(&rxl_item->list);
1278         synchronize_rcu();
1279         kfree(rxl_item);
1280 }
1281 EXPORT_SYMBOL(mlxsw_core_rx_listener_unregister);
1282
1283 static void mlxsw_core_event_listener_func(struct sk_buff *skb, u8 local_port,
1284                                            void *priv)
1285 {
1286         struct mlxsw_event_listener_item *event_listener_item = priv;
1287         struct mlxsw_reg_info reg;
1288         char *payload;
1289         char *op_tlv = mlxsw_emad_op_tlv(skb);
1290         char *reg_tlv = mlxsw_emad_reg_tlv(skb);
1291
1292         reg.id = mlxsw_emad_op_tlv_register_id_get(op_tlv);
1293         reg.len = (mlxsw_emad_reg_tlv_len_get(reg_tlv) - 1) * sizeof(u32);
1294         payload = mlxsw_emad_reg_payload(op_tlv);
1295         event_listener_item->el.func(&reg, payload, event_listener_item->priv);
1296         dev_kfree_skb(skb);
1297 }
1298
1299 static bool __is_event_listener_equal(const struct mlxsw_event_listener *el_a,
1300                                       const struct mlxsw_event_listener *el_b)
1301 {
1302         return (el_a->func == el_b->func &&
1303                 el_a->trap_id == el_b->trap_id);
1304 }
1305
1306 static struct mlxsw_event_listener_item *
1307 __find_event_listener_item(struct mlxsw_core *mlxsw_core,
1308                            const struct mlxsw_event_listener *el,
1309                            void *priv)
1310 {
1311         struct mlxsw_event_listener_item *el_item;
1312
1313         list_for_each_entry(el_item, &mlxsw_core->event_listener_list, list) {
1314                 if (__is_event_listener_equal(&el_item->el, el) &&
1315                     el_item->priv == priv)
1316                         return el_item;
1317         }
1318         return NULL;
1319 }
1320
1321 int mlxsw_core_event_listener_register(struct mlxsw_core *mlxsw_core,
1322                                        const struct mlxsw_event_listener *el,
1323                                        void *priv)
1324 {
1325         int err;
1326         struct mlxsw_event_listener_item *el_item;
1327         const struct mlxsw_rx_listener rxl = {
1328                 .func = mlxsw_core_event_listener_func,
1329                 .local_port = MLXSW_PORT_DONT_CARE,
1330                 .trap_id = el->trap_id,
1331         };
1332
1333         el_item = __find_event_listener_item(mlxsw_core, el, priv);
1334         if (el_item)
1335                 return -EEXIST;
1336         el_item = kmalloc(sizeof(*el_item), GFP_KERNEL);
1337         if (!el_item)
1338                 return -ENOMEM;
1339         el_item->el = *el;
1340         el_item->priv = priv;
1341
1342         err = mlxsw_core_rx_listener_register(mlxsw_core, &rxl, el_item);
1343         if (err)
1344                 goto err_rx_listener_register;
1345
1346         /* No reason to save item if we did not manage to register an RX
1347          * listener for it.
1348          */
1349         list_add_rcu(&el_item->list, &mlxsw_core->event_listener_list);
1350
1351         return 0;
1352
1353 err_rx_listener_register:
1354         kfree(el_item);
1355         return err;
1356 }
1357 EXPORT_SYMBOL(mlxsw_core_event_listener_register);
1358
1359 void mlxsw_core_event_listener_unregister(struct mlxsw_core *mlxsw_core,
1360                                           const struct mlxsw_event_listener *el,
1361                                           void *priv)
1362 {
1363         struct mlxsw_event_listener_item *el_item;
1364         const struct mlxsw_rx_listener rxl = {
1365                 .func = mlxsw_core_event_listener_func,
1366                 .local_port = MLXSW_PORT_DONT_CARE,
1367                 .trap_id = el->trap_id,
1368         };
1369
1370         el_item = __find_event_listener_item(mlxsw_core, el, priv);
1371         if (!el_item)
1372                 return;
1373         mlxsw_core_rx_listener_unregister(mlxsw_core, &rxl, el_item);
1374         list_del(&el_item->list);
1375         kfree(el_item);
1376 }
1377 EXPORT_SYMBOL(mlxsw_core_event_listener_unregister);
1378
1379 static int mlxsw_core_listener_register(struct mlxsw_core *mlxsw_core,
1380                                         const struct mlxsw_listener *listener,
1381                                         void *priv)
1382 {
1383         if (listener->is_event)
1384                 return mlxsw_core_event_listener_register(mlxsw_core,
1385                                                 &listener->u.event_listener,
1386                                                 priv);
1387         else
1388                 return mlxsw_core_rx_listener_register(mlxsw_core,
1389                                                 &listener->u.rx_listener,
1390                                                 priv);
1391 }
1392
1393 static void mlxsw_core_listener_unregister(struct mlxsw_core *mlxsw_core,
1394                                       const struct mlxsw_listener *listener,
1395                                       void *priv)
1396 {
1397         if (listener->is_event)
1398                 mlxsw_core_event_listener_unregister(mlxsw_core,
1399                                                      &listener->u.event_listener,
1400                                                      priv);
1401         else
1402                 mlxsw_core_rx_listener_unregister(mlxsw_core,
1403                                                   &listener->u.rx_listener,
1404                                                   priv);
1405 }
1406
1407 int mlxsw_core_trap_register(struct mlxsw_core *mlxsw_core,
1408                              const struct mlxsw_listener *listener, void *priv)
1409 {
1410         char hpkt_pl[MLXSW_REG_HPKT_LEN];
1411         int err;
1412
1413         err = mlxsw_core_listener_register(mlxsw_core, listener, priv);
1414         if (err)
1415                 return err;
1416
1417         mlxsw_reg_hpkt_pack(hpkt_pl, listener->action, listener->trap_id,
1418                             listener->trap_group, listener->is_ctrl);
1419         err = mlxsw_reg_write(mlxsw_core,  MLXSW_REG(hpkt), hpkt_pl);
1420         if (err)
1421                 goto err_trap_set;
1422
1423         return 0;
1424
1425 err_trap_set:
1426         mlxsw_core_listener_unregister(mlxsw_core, listener, priv);
1427         return err;
1428 }
1429 EXPORT_SYMBOL(mlxsw_core_trap_register);
1430
1431 void mlxsw_core_trap_unregister(struct mlxsw_core *mlxsw_core,
1432                                 const struct mlxsw_listener *listener,
1433                                 void *priv)
1434 {
1435         char hpkt_pl[MLXSW_REG_HPKT_LEN];
1436
1437         if (!listener->is_event) {
1438                 mlxsw_reg_hpkt_pack(hpkt_pl, listener->unreg_action,
1439                                     listener->trap_id, listener->trap_group,
1440                                     listener->is_ctrl);
1441                 mlxsw_reg_write(mlxsw_core, MLXSW_REG(hpkt), hpkt_pl);
1442         }
1443
1444         mlxsw_core_listener_unregister(mlxsw_core, listener, priv);
1445 }
1446 EXPORT_SYMBOL(mlxsw_core_trap_unregister);
1447
1448 static u64 mlxsw_core_tid_get(struct mlxsw_core *mlxsw_core)
1449 {
1450         return atomic64_inc_return(&mlxsw_core->emad.tid);
1451 }
1452
1453 static int mlxsw_core_reg_access_emad(struct mlxsw_core *mlxsw_core,
1454                                       const struct mlxsw_reg_info *reg,
1455                                       char *payload,
1456                                       enum mlxsw_core_reg_access_type type,
1457                                       struct list_head *bulk_list,
1458                                       mlxsw_reg_trans_cb_t *cb,
1459                                       unsigned long cb_priv)
1460 {
1461         u64 tid = mlxsw_core_tid_get(mlxsw_core);
1462         struct mlxsw_reg_trans *trans;
1463         int err;
1464
1465         trans = kzalloc(sizeof(*trans), GFP_KERNEL);
1466         if (!trans)
1467                 return -ENOMEM;
1468
1469         err = mlxsw_emad_reg_access(mlxsw_core, reg, payload, type, trans,
1470                                     bulk_list, cb, cb_priv, tid);
1471         if (err) {
1472                 kfree(trans);
1473                 return err;
1474         }
1475         return 0;
1476 }
1477
1478 int mlxsw_reg_trans_query(struct mlxsw_core *mlxsw_core,
1479                           const struct mlxsw_reg_info *reg, char *payload,
1480                           struct list_head *bulk_list,
1481                           mlxsw_reg_trans_cb_t *cb, unsigned long cb_priv)
1482 {
1483         return mlxsw_core_reg_access_emad(mlxsw_core, reg, payload,
1484                                           MLXSW_CORE_REG_ACCESS_TYPE_QUERY,
1485                                           bulk_list, cb, cb_priv);
1486 }
1487 EXPORT_SYMBOL(mlxsw_reg_trans_query);
1488
1489 int mlxsw_reg_trans_write(struct mlxsw_core *mlxsw_core,
1490                           const struct mlxsw_reg_info *reg, char *payload,
1491                           struct list_head *bulk_list,
1492                           mlxsw_reg_trans_cb_t *cb, unsigned long cb_priv)
1493 {
1494         return mlxsw_core_reg_access_emad(mlxsw_core, reg, payload,
1495                                           MLXSW_CORE_REG_ACCESS_TYPE_WRITE,
1496                                           bulk_list, cb, cb_priv);
1497 }
1498 EXPORT_SYMBOL(mlxsw_reg_trans_write);
1499
1500 static int mlxsw_reg_trans_wait(struct mlxsw_reg_trans *trans)
1501 {
1502         struct mlxsw_core *mlxsw_core = trans->core;
1503         int err;
1504
1505         wait_for_completion(&trans->completion);
1506         cancel_delayed_work_sync(&trans->timeout_dw);
1507         err = trans->err;
1508
1509         if (trans->retries)
1510                 dev_warn(mlxsw_core->bus_info->dev, "EMAD retries (%d/%d) (tid=%llx)\n",
1511                          trans->retries, MLXSW_EMAD_MAX_RETRY, trans->tid);
1512         if (err) {
1513                 dev_err(mlxsw_core->bus_info->dev, "EMAD reg access failed (tid=%llx,reg_id=%x(%s),type=%s,status=%x(%s))\n",
1514                         trans->tid, trans->reg->id,
1515                         mlxsw_reg_id_str(trans->reg->id),
1516                         mlxsw_core_reg_access_type_str(trans->type),
1517                         trans->emad_status,
1518                         mlxsw_emad_op_tlv_status_str(trans->emad_status));
1519                 trace_devlink_hwerr(priv_to_devlink(mlxsw_core),
1520                                     trans->emad_status,
1521                                     mlxsw_emad_op_tlv_status_str(trans->emad_status));
1522         }
1523
1524         list_del(&trans->bulk_list);
1525         kfree_rcu(trans, rcu);
1526         return err;
1527 }
1528
1529 int mlxsw_reg_trans_bulk_wait(struct list_head *bulk_list)
1530 {
1531         struct mlxsw_reg_trans *trans;
1532         struct mlxsw_reg_trans *tmp;
1533         int sum_err = 0;
1534         int err;
1535
1536         list_for_each_entry_safe(trans, tmp, bulk_list, bulk_list) {
1537                 err = mlxsw_reg_trans_wait(trans);
1538                 if (err && sum_err == 0)
1539                         sum_err = err; /* first error to be returned */
1540         }
1541         return sum_err;
1542 }
1543 EXPORT_SYMBOL(mlxsw_reg_trans_bulk_wait);
1544
1545 static int mlxsw_core_reg_access_cmd(struct mlxsw_core *mlxsw_core,
1546                                      const struct mlxsw_reg_info *reg,
1547                                      char *payload,
1548                                      enum mlxsw_core_reg_access_type type)
1549 {
1550         enum mlxsw_emad_op_tlv_status status;
1551         int err, n_retry;
1552         bool reset_ok;
1553         char *in_mbox, *out_mbox, *tmp;
1554
1555         dev_dbg(mlxsw_core->bus_info->dev, "Reg cmd access (reg_id=%x(%s),type=%s)\n",
1556                 reg->id, mlxsw_reg_id_str(reg->id),
1557                 mlxsw_core_reg_access_type_str(type));
1558
1559         in_mbox = mlxsw_cmd_mbox_alloc();
1560         if (!in_mbox)
1561                 return -ENOMEM;
1562
1563         out_mbox = mlxsw_cmd_mbox_alloc();
1564         if (!out_mbox) {
1565                 err = -ENOMEM;
1566                 goto free_in_mbox;
1567         }
1568
1569         mlxsw_emad_pack_op_tlv(in_mbox, reg, type,
1570                                mlxsw_core_tid_get(mlxsw_core));
1571         tmp = in_mbox + MLXSW_EMAD_OP_TLV_LEN * sizeof(u32);
1572         mlxsw_emad_pack_reg_tlv(tmp, reg, payload);
1573
1574         /* There is a special treatment needed for MRSR (reset) register.
1575          * The command interface will return error after the command
1576          * is executed, so tell the lower layer to expect it
1577          * and cope accordingly.
1578          */
1579         reset_ok = reg->id == MLXSW_REG_MRSR_ID;
1580
1581         n_retry = 0;
1582 retry:
1583         err = mlxsw_cmd_access_reg(mlxsw_core, reset_ok, in_mbox, out_mbox);
1584         if (!err) {
1585                 err = mlxsw_emad_process_status(out_mbox, &status);
1586                 if (err) {
1587                         if (err == -EAGAIN && n_retry++ < MLXSW_EMAD_MAX_RETRY)
1588                                 goto retry;
1589                         dev_err(mlxsw_core->bus_info->dev, "Reg cmd access status failed (status=%x(%s))\n",
1590                                 status, mlxsw_emad_op_tlv_status_str(status));
1591                 }
1592         }
1593
1594         if (!err)
1595                 memcpy(payload, mlxsw_emad_reg_payload(out_mbox),
1596                        reg->len);
1597
1598         mlxsw_cmd_mbox_free(out_mbox);
1599 free_in_mbox:
1600         mlxsw_cmd_mbox_free(in_mbox);
1601         if (err)
1602                 dev_err(mlxsw_core->bus_info->dev, "Reg cmd access failed (reg_id=%x(%s),type=%s)\n",
1603                         reg->id, mlxsw_reg_id_str(reg->id),
1604                         mlxsw_core_reg_access_type_str(type));
1605         return err;
1606 }
1607
1608 static void mlxsw_core_reg_access_cb(struct mlxsw_core *mlxsw_core,
1609                                      char *payload, size_t payload_len,
1610                                      unsigned long cb_priv)
1611 {
1612         char *orig_payload = (char *) cb_priv;
1613
1614         memcpy(orig_payload, payload, payload_len);
1615 }
1616
1617 static int mlxsw_core_reg_access(struct mlxsw_core *mlxsw_core,
1618                                  const struct mlxsw_reg_info *reg,
1619                                  char *payload,
1620                                  enum mlxsw_core_reg_access_type type)
1621 {
1622         LIST_HEAD(bulk_list);
1623         int err;
1624
1625         /* During initialization EMAD interface is not available to us,
1626          * so we default to command interface. We switch to EMAD interface
1627          * after setting the appropriate traps.
1628          */
1629         if (!mlxsw_core->emad.use_emad)
1630                 return mlxsw_core_reg_access_cmd(mlxsw_core, reg,
1631                                                  payload, type);
1632
1633         err = mlxsw_core_reg_access_emad(mlxsw_core, reg,
1634                                          payload, type, &bulk_list,
1635                                          mlxsw_core_reg_access_cb,
1636                                          (unsigned long) payload);
1637         if (err)
1638                 return err;
1639         return mlxsw_reg_trans_bulk_wait(&bulk_list);
1640 }
1641
1642 int mlxsw_reg_query(struct mlxsw_core *mlxsw_core,
1643                     const struct mlxsw_reg_info *reg, char *payload)
1644 {
1645         return mlxsw_core_reg_access(mlxsw_core, reg, payload,
1646                                      MLXSW_CORE_REG_ACCESS_TYPE_QUERY);
1647 }
1648 EXPORT_SYMBOL(mlxsw_reg_query);
1649
1650 int mlxsw_reg_write(struct mlxsw_core *mlxsw_core,
1651                     const struct mlxsw_reg_info *reg, char *payload)
1652 {
1653         return mlxsw_core_reg_access(mlxsw_core, reg, payload,
1654                                      MLXSW_CORE_REG_ACCESS_TYPE_WRITE);
1655 }
1656 EXPORT_SYMBOL(mlxsw_reg_write);
1657
1658 void mlxsw_core_skb_receive(struct mlxsw_core *mlxsw_core, struct sk_buff *skb,
1659                             struct mlxsw_rx_info *rx_info)
1660 {
1661         struct mlxsw_rx_listener_item *rxl_item;
1662         const struct mlxsw_rx_listener *rxl;
1663         u8 local_port;
1664         bool found = false;
1665
1666         if (rx_info->is_lag) {
1667                 dev_dbg_ratelimited(mlxsw_core->bus_info->dev, "%s: lag_id = %d, lag_port_index = 0x%x\n",
1668                                     __func__, rx_info->u.lag_id,
1669                                     rx_info->trap_id);
1670                 /* Upper layer does not care if the skb came from LAG or not,
1671                  * so just get the local_port for the lag port and push it up.
1672                  */
1673                 local_port = mlxsw_core_lag_mapping_get(mlxsw_core,
1674                                                         rx_info->u.lag_id,
1675                                                         rx_info->lag_port_index);
1676         } else {
1677                 local_port = rx_info->u.sys_port;
1678         }
1679
1680         dev_dbg_ratelimited(mlxsw_core->bus_info->dev, "%s: local_port = %d, trap_id = 0x%x\n",
1681                             __func__, local_port, rx_info->trap_id);
1682
1683         if ((rx_info->trap_id >= MLXSW_TRAP_ID_MAX) ||
1684             (local_port >= mlxsw_core->max_ports))
1685                 goto drop;
1686
1687         rcu_read_lock();
1688         list_for_each_entry_rcu(rxl_item, &mlxsw_core->rx_listener_list, list) {
1689                 rxl = &rxl_item->rxl;
1690                 if ((rxl->local_port == MLXSW_PORT_DONT_CARE ||
1691                      rxl->local_port == local_port) &&
1692                     rxl->trap_id == rx_info->trap_id) {
1693                         found = true;
1694                         break;
1695                 }
1696         }
1697         rcu_read_unlock();
1698         if (!found)
1699                 goto drop;
1700
1701         rxl->func(skb, local_port, rxl_item->priv);
1702         return;
1703
1704 drop:
1705         dev_kfree_skb(skb);
1706 }
1707 EXPORT_SYMBOL(mlxsw_core_skb_receive);
1708
1709 static int mlxsw_core_lag_mapping_index(struct mlxsw_core *mlxsw_core,
1710                                         u16 lag_id, u8 port_index)
1711 {
1712         return MLXSW_CORE_RES_GET(mlxsw_core, MAX_LAG_MEMBERS) * lag_id +
1713                port_index;
1714 }
1715
1716 void mlxsw_core_lag_mapping_set(struct mlxsw_core *mlxsw_core,
1717                                 u16 lag_id, u8 port_index, u8 local_port)
1718 {
1719         int index = mlxsw_core_lag_mapping_index(mlxsw_core,
1720                                                  lag_id, port_index);
1721
1722         mlxsw_core->lag.mapping[index] = local_port;
1723 }
1724 EXPORT_SYMBOL(mlxsw_core_lag_mapping_set);
1725
1726 u8 mlxsw_core_lag_mapping_get(struct mlxsw_core *mlxsw_core,
1727                               u16 lag_id, u8 port_index)
1728 {
1729         int index = mlxsw_core_lag_mapping_index(mlxsw_core,
1730                                                  lag_id, port_index);
1731
1732         return mlxsw_core->lag.mapping[index];
1733 }
1734 EXPORT_SYMBOL(mlxsw_core_lag_mapping_get);
1735
1736 void mlxsw_core_lag_mapping_clear(struct mlxsw_core *mlxsw_core,
1737                                   u16 lag_id, u8 local_port)
1738 {
1739         int i;
1740
1741         for (i = 0; i < MLXSW_CORE_RES_GET(mlxsw_core, MAX_LAG_MEMBERS); i++) {
1742                 int index = mlxsw_core_lag_mapping_index(mlxsw_core,
1743                                                          lag_id, i);
1744
1745                 if (mlxsw_core->lag.mapping[index] == local_port)
1746                         mlxsw_core->lag.mapping[index] = 0;
1747         }
1748 }
1749 EXPORT_SYMBOL(mlxsw_core_lag_mapping_clear);
1750
1751 bool mlxsw_core_res_valid(struct mlxsw_core *mlxsw_core,
1752                           enum mlxsw_res_id res_id)
1753 {
1754         return mlxsw_res_valid(&mlxsw_core->res, res_id);
1755 }
1756 EXPORT_SYMBOL(mlxsw_core_res_valid);
1757
1758 u64 mlxsw_core_res_get(struct mlxsw_core *mlxsw_core,
1759                        enum mlxsw_res_id res_id)
1760 {
1761         return mlxsw_res_get(&mlxsw_core->res, res_id);
1762 }
1763 EXPORT_SYMBOL(mlxsw_core_res_get);
1764
1765 int mlxsw_core_port_init(struct mlxsw_core *mlxsw_core, u8 local_port,
1766                          u32 port_number, bool split,
1767                          u32 split_port_subnumber,
1768                          const unsigned char *switch_id,
1769                          unsigned char switch_id_len)
1770 {
1771         struct devlink *devlink = priv_to_devlink(mlxsw_core);
1772         struct mlxsw_core_port *mlxsw_core_port =
1773                                         &mlxsw_core->ports[local_port];
1774         struct devlink_port *devlink_port = &mlxsw_core_port->devlink_port;
1775         int err;
1776
1777         mlxsw_core_port->local_port = local_port;
1778         devlink_port_attrs_set(devlink_port, DEVLINK_PORT_FLAVOUR_PHYSICAL,
1779                                port_number, split, split_port_subnumber,
1780                                switch_id, switch_id_len);
1781         err = devlink_port_register(devlink, devlink_port, local_port);
1782         if (err)
1783                 memset(mlxsw_core_port, 0, sizeof(*mlxsw_core_port));
1784         return err;
1785 }
1786 EXPORT_SYMBOL(mlxsw_core_port_init);
1787
1788 void mlxsw_core_port_fini(struct mlxsw_core *mlxsw_core, u8 local_port)
1789 {
1790         struct mlxsw_core_port *mlxsw_core_port =
1791                                         &mlxsw_core->ports[local_port];
1792         struct devlink_port *devlink_port = &mlxsw_core_port->devlink_port;
1793
1794         devlink_port_unregister(devlink_port);
1795         memset(mlxsw_core_port, 0, sizeof(*mlxsw_core_port));
1796 }
1797 EXPORT_SYMBOL(mlxsw_core_port_fini);
1798
1799 void mlxsw_core_port_eth_set(struct mlxsw_core *mlxsw_core, u8 local_port,
1800                              void *port_driver_priv, struct net_device *dev)
1801 {
1802         struct mlxsw_core_port *mlxsw_core_port =
1803                                         &mlxsw_core->ports[local_port];
1804         struct devlink_port *devlink_port = &mlxsw_core_port->devlink_port;
1805
1806         mlxsw_core_port->port_driver_priv = port_driver_priv;
1807         devlink_port_type_eth_set(devlink_port, dev);
1808 }
1809 EXPORT_SYMBOL(mlxsw_core_port_eth_set);
1810
1811 void mlxsw_core_port_ib_set(struct mlxsw_core *mlxsw_core, u8 local_port,
1812                             void *port_driver_priv)
1813 {
1814         struct mlxsw_core_port *mlxsw_core_port =
1815                                         &mlxsw_core->ports[local_port];
1816         struct devlink_port *devlink_port = &mlxsw_core_port->devlink_port;
1817
1818         mlxsw_core_port->port_driver_priv = port_driver_priv;
1819         devlink_port_type_ib_set(devlink_port, NULL);
1820 }
1821 EXPORT_SYMBOL(mlxsw_core_port_ib_set);
1822
1823 void mlxsw_core_port_clear(struct mlxsw_core *mlxsw_core, u8 local_port,
1824                            void *port_driver_priv)
1825 {
1826         struct mlxsw_core_port *mlxsw_core_port =
1827                                         &mlxsw_core->ports[local_port];
1828         struct devlink_port *devlink_port = &mlxsw_core_port->devlink_port;
1829
1830         mlxsw_core_port->port_driver_priv = port_driver_priv;
1831         devlink_port_type_clear(devlink_port);
1832 }
1833 EXPORT_SYMBOL(mlxsw_core_port_clear);
1834
1835 enum devlink_port_type mlxsw_core_port_type_get(struct mlxsw_core *mlxsw_core,
1836                                                 u8 local_port)
1837 {
1838         struct mlxsw_core_port *mlxsw_core_port =
1839                                         &mlxsw_core->ports[local_port];
1840         struct devlink_port *devlink_port = &mlxsw_core_port->devlink_port;
1841
1842         return devlink_port->type;
1843 }
1844 EXPORT_SYMBOL(mlxsw_core_port_type_get);
1845
1846
1847 struct devlink_port *
1848 mlxsw_core_port_devlink_port_get(struct mlxsw_core *mlxsw_core,
1849                                  u8 local_port)
1850 {
1851         struct mlxsw_core_port *mlxsw_core_port =
1852                                         &mlxsw_core->ports[local_port];
1853         struct devlink_port *devlink_port = &mlxsw_core_port->devlink_port;
1854
1855         return devlink_port;
1856 }
1857 EXPORT_SYMBOL(mlxsw_core_port_devlink_port_get);
1858
1859 static void mlxsw_core_buf_dump_dbg(struct mlxsw_core *mlxsw_core,
1860                                     const char *buf, size_t size)
1861 {
1862         __be32 *m = (__be32 *) buf;
1863         int i;
1864         int count = size / sizeof(__be32);
1865
1866         for (i = count - 1; i >= 0; i--)
1867                 if (m[i])
1868                         break;
1869         i++;
1870         count = i ? i : 1;
1871         for (i = 0; i < count; i += 4)
1872                 dev_dbg(mlxsw_core->bus_info->dev, "%04x - %08x %08x %08x %08x\n",
1873                         i * 4, be32_to_cpu(m[i]), be32_to_cpu(m[i + 1]),
1874                         be32_to_cpu(m[i + 2]), be32_to_cpu(m[i + 3]));
1875 }
1876
1877 int mlxsw_cmd_exec(struct mlxsw_core *mlxsw_core, u16 opcode, u8 opcode_mod,
1878                    u32 in_mod, bool out_mbox_direct, bool reset_ok,
1879                    char *in_mbox, size_t in_mbox_size,
1880                    char *out_mbox, size_t out_mbox_size)
1881 {
1882         u8 status;
1883         int err;
1884
1885         BUG_ON(in_mbox_size % sizeof(u32) || out_mbox_size % sizeof(u32));
1886         if (!mlxsw_core->bus->cmd_exec)
1887                 return -EOPNOTSUPP;
1888
1889         dev_dbg(mlxsw_core->bus_info->dev, "Cmd exec (opcode=%x(%s),opcode_mod=%x,in_mod=%x)\n",
1890                 opcode, mlxsw_cmd_opcode_str(opcode), opcode_mod, in_mod);
1891         if (in_mbox) {
1892                 dev_dbg(mlxsw_core->bus_info->dev, "Input mailbox:\n");
1893                 mlxsw_core_buf_dump_dbg(mlxsw_core, in_mbox, in_mbox_size);
1894         }
1895
1896         err = mlxsw_core->bus->cmd_exec(mlxsw_core->bus_priv, opcode,
1897                                         opcode_mod, in_mod, out_mbox_direct,
1898                                         in_mbox, in_mbox_size,
1899                                         out_mbox, out_mbox_size, &status);
1900
1901         if (!err && out_mbox) {
1902                 dev_dbg(mlxsw_core->bus_info->dev, "Output mailbox:\n");
1903                 mlxsw_core_buf_dump_dbg(mlxsw_core, out_mbox, out_mbox_size);
1904         }
1905
1906         if (reset_ok && err == -EIO &&
1907             status == MLXSW_CMD_STATUS_RUNNING_RESET) {
1908                 err = 0;
1909         } else if (err == -EIO && status != MLXSW_CMD_STATUS_OK) {
1910                 dev_err(mlxsw_core->bus_info->dev, "Cmd exec failed (opcode=%x(%s),opcode_mod=%x,in_mod=%x,status=%x(%s))\n",
1911                         opcode, mlxsw_cmd_opcode_str(opcode), opcode_mod,
1912                         in_mod, status, mlxsw_cmd_status_str(status));
1913         } else if (err == -ETIMEDOUT) {
1914                 dev_err(mlxsw_core->bus_info->dev, "Cmd exec timed-out (opcode=%x(%s),opcode_mod=%x,in_mod=%x)\n",
1915                         opcode, mlxsw_cmd_opcode_str(opcode), opcode_mod,
1916                         in_mod);
1917         }
1918
1919         return err;
1920 }
1921 EXPORT_SYMBOL(mlxsw_cmd_exec);
1922
1923 int mlxsw_core_schedule_dw(struct delayed_work *dwork, unsigned long delay)
1924 {
1925         return queue_delayed_work(mlxsw_wq, dwork, delay);
1926 }
1927 EXPORT_SYMBOL(mlxsw_core_schedule_dw);
1928
1929 bool mlxsw_core_schedule_work(struct work_struct *work)
1930 {
1931         return queue_work(mlxsw_owq, work);
1932 }
1933 EXPORT_SYMBOL(mlxsw_core_schedule_work);
1934
1935 void mlxsw_core_flush_owq(void)
1936 {
1937         flush_workqueue(mlxsw_owq);
1938 }
1939 EXPORT_SYMBOL(mlxsw_core_flush_owq);
1940
1941 int mlxsw_core_kvd_sizes_get(struct mlxsw_core *mlxsw_core,
1942                              const struct mlxsw_config_profile *profile,
1943                              u64 *p_single_size, u64 *p_double_size,
1944                              u64 *p_linear_size)
1945 {
1946         struct mlxsw_driver *driver = mlxsw_core->driver;
1947
1948         if (!driver->kvd_sizes_get)
1949                 return -EINVAL;
1950
1951         return driver->kvd_sizes_get(mlxsw_core, profile,
1952                                      p_single_size, p_double_size,
1953                                      p_linear_size);
1954 }
1955 EXPORT_SYMBOL(mlxsw_core_kvd_sizes_get);
1956
1957 void mlxsw_core_fw_flash_start(struct mlxsw_core *mlxsw_core)
1958 {
1959         mlxsw_core->fw_flash_in_progress = true;
1960 }
1961 EXPORT_SYMBOL(mlxsw_core_fw_flash_start);
1962
1963 void mlxsw_core_fw_flash_end(struct mlxsw_core *mlxsw_core)
1964 {
1965         mlxsw_core->fw_flash_in_progress = false;
1966 }
1967 EXPORT_SYMBOL(mlxsw_core_fw_flash_end);
1968
1969 int mlxsw_core_resources_query(struct mlxsw_core *mlxsw_core, char *mbox,
1970                                struct mlxsw_res *res)
1971 {
1972         int index, i;
1973         u64 data;
1974         u16 id;
1975         int err;
1976
1977         if (!res)
1978                 return 0;
1979
1980         mlxsw_cmd_mbox_zero(mbox);
1981
1982         for (index = 0; index < MLXSW_CMD_QUERY_RESOURCES_MAX_QUERIES;
1983              index++) {
1984                 err = mlxsw_cmd_query_resources(mlxsw_core, mbox, index);
1985                 if (err)
1986                         return err;
1987
1988                 for (i = 0; i < MLXSW_CMD_QUERY_RESOURCES_PER_QUERY; i++) {
1989                         id = mlxsw_cmd_mbox_query_resource_id_get(mbox, i);
1990                         data = mlxsw_cmd_mbox_query_resource_data_get(mbox, i);
1991
1992                         if (id == MLXSW_CMD_QUERY_RESOURCES_TABLE_END_ID)
1993                                 return 0;
1994
1995                         mlxsw_res_parse(res, id, data);
1996                 }
1997         }
1998
1999         /* If after MLXSW_RESOURCES_QUERY_MAX_QUERIES we still didn't get
2000          * MLXSW_RESOURCES_TABLE_END_ID, something went bad in the FW.
2001          */
2002         return -EIO;
2003 }
2004 EXPORT_SYMBOL(mlxsw_core_resources_query);
2005
2006 static int __init mlxsw_core_module_init(void)
2007 {
2008         int err;
2009
2010         mlxsw_wq = alloc_workqueue(mlxsw_core_driver_name, 0, 0);
2011         if (!mlxsw_wq)
2012                 return -ENOMEM;
2013         mlxsw_owq = alloc_ordered_workqueue("%s_ordered", 0,
2014                                             mlxsw_core_driver_name);
2015         if (!mlxsw_owq) {
2016                 err = -ENOMEM;
2017                 goto err_alloc_ordered_workqueue;
2018         }
2019         return 0;
2020
2021 err_alloc_ordered_workqueue:
2022         destroy_workqueue(mlxsw_wq);
2023         return err;
2024 }
2025
2026 static void __exit mlxsw_core_module_exit(void)
2027 {
2028         destroy_workqueue(mlxsw_owq);
2029         destroy_workqueue(mlxsw_wq);
2030 }
2031
2032 module_init(mlxsw_core_module_init);
2033 module_exit(mlxsw_core_module_exit);
2034
2035 MODULE_LICENSE("Dual BSD/GPL");
2036 MODULE_AUTHOR("Jiri Pirko <jiri@mellanox.com>");
2037 MODULE_DESCRIPTION("Mellanox switch device core driver");