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