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         mlxsw_core->reload_fail = !!err;
 947
 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                 if (!reload)
1088                         /* Only the parts that were not de-initialized in the
1089                          * failed reload attempt need to be de-initialized.
1090                          */
1091                         goto reload_fail_deinit;
1092                 else
1093                         return;
1094         }
1095
1096         if (mlxsw_core->driver->fini)
1097                 mlxsw_core->driver->fini(mlxsw_core);
1098         mlxsw_thermal_fini(mlxsw_core->thermal);
1099         mlxsw_hwmon_fini(mlxsw_core->hwmon);
1100         if (!reload)
1101                 devlink_unregister(devlink);
1102         mlxsw_emad_fini(mlxsw_core);
1103         kfree(mlxsw_core->lag.mapping);
1104         mlxsw_ports_fini(mlxsw_core);
1105         if (!reload)
1106                 devlink_resources_unregister(devlink, NULL);
1107         mlxsw_core->bus->fini(mlxsw_core->bus_priv);
1108
1109         return;
1110
1111 reload_fail_deinit:
1112         devlink_unregister(devlink);
1113         devlink_resources_unregister(devlink, NULL);
1114         devlink_free(devlink);
1115 }
1116 EXPORT_SYMBOL(mlxsw_core_bus_device_unregister);
1117
1118 bool mlxsw_core_skb_transmit_busy(struct mlxsw_core *mlxsw_core,
1119                                   const struct mlxsw_tx_info *tx_info)
1120 {
1121         return mlxsw_core->bus->skb_transmit_busy(mlxsw_core->bus_priv,
1122                                                   tx_info);
1123 }
1124 EXPORT_SYMBOL(mlxsw_core_skb_transmit_busy);
1125
1126 int mlxsw_core_skb_transmit(struct mlxsw_core *mlxsw_core, struct sk_buff *skb,
1127                             const struct mlxsw_tx_info *tx_info)
1128 {
1129         return mlxsw_core->bus->skb_transmit(mlxsw_core->bus_priv, skb,
1130                                              tx_info);
1131 }
1132 EXPORT_SYMBOL(mlxsw_core_skb_transmit);
1133
1134 static bool __is_rx_listener_equal(const struct mlxsw_rx_listener *rxl_a,
1135                                    const struct mlxsw_rx_listener *rxl_b)
1136 {
1137         return (rxl_a->func == rxl_b->func &&
1138                 rxl_a->local_port == rxl_b->local_port &&
1139                 rxl_a->trap_id == rxl_b->trap_id);
1140 }
1141
1142 static struct mlxsw_rx_listener_item *
1143 __find_rx_listener_item(struct mlxsw_core *mlxsw_core,
1144                         const struct mlxsw_rx_listener *rxl,
1145                         void *priv)
1146 {
1147         struct mlxsw_rx_listener_item *rxl_item;
1148
1149         list_for_each_entry(rxl_item, &mlxsw_core->rx_listener_list, list) {
1150                 if (__is_rx_listener_equal(&rxl_item->rxl, rxl) &&
1151                     rxl_item->priv == priv)
1152                         return rxl_item;
1153         }
1154         return NULL;
1155 }
1156
1157 int mlxsw_core_rx_listener_register(struct mlxsw_core *mlxsw_core,
1158                                     const struct mlxsw_rx_listener *rxl,
1159                                     void *priv)
1160 {
1161         struct mlxsw_rx_listener_item *rxl_item;
1162
1163         rxl_item = __find_rx_listener_item(mlxsw_core, rxl, priv);
1164         if (rxl_item)
1165                 return -EEXIST;
1166         rxl_item = kmalloc(sizeof(*rxl_item), GFP_KERNEL);
1167         if (!rxl_item)
1168                 return -ENOMEM;
1169         rxl_item->rxl = *rxl;
1170         rxl_item->priv = priv;
1171
1172         list_add_rcu(&rxl_item->list, &mlxsw_core->rx_listener_list);
1173         return 0;
1174 }
1175 EXPORT_SYMBOL(mlxsw_core_rx_listener_register);
1176
1177 void mlxsw_core_rx_listener_unregister(struct mlxsw_core *mlxsw_core,
1178                                        const struct mlxsw_rx_listener *rxl,
1179                                        void *priv)
1180 {
1181         struct mlxsw_rx_listener_item *rxl_item;
1182
1183         rxl_item = __find_rx_listener_item(mlxsw_core, rxl, priv);
1184         if (!rxl_item)
1185                 return;
1186         list_del_rcu(&rxl_item->list);
1187         synchronize_rcu();
1188         kfree(rxl_item);
1189 }
1190 EXPORT_SYMBOL(mlxsw_core_rx_listener_unregister);
1191
1192 static void mlxsw_core_event_listener_func(struct sk_buff *skb, u8 local_port,
1193                                            void *priv)
1194 {
1195         struct mlxsw_event_listener_item *event_listener_item = priv;
1196         struct mlxsw_reg_info reg;
1197         char *payload;
1198         char *op_tlv = mlxsw_emad_op_tlv(skb);
1199         char *reg_tlv = mlxsw_emad_reg_tlv(skb);
1200
1201         reg.id = mlxsw_emad_op_tlv_register_id_get(op_tlv);
1202         reg.len = (mlxsw_emad_reg_tlv_len_get(reg_tlv) - 1) * sizeof(u32);
1203         payload = mlxsw_emad_reg_payload(op_tlv);
1204         event_listener_item->el.func(&reg, payload, event_listener_item->priv);
1205         dev_kfree_skb(skb);
1206 }
1207
1208 static bool __is_event_listener_equal(const struct mlxsw_event_listener *el_a,
1209                                       const struct mlxsw_event_listener *el_b)
1210 {
1211         return (el_a->func == el_b->func &&
1212                 el_a->trap_id == el_b->trap_id);
1213 }
1214
1215 static struct mlxsw_event_listener_item *
1216 __find_event_listener_item(struct mlxsw_core *mlxsw_core,
1217                            const struct mlxsw_event_listener *el,
1218                            void *priv)
1219 {
1220         struct mlxsw_event_listener_item *el_item;
1221
1222         list_for_each_entry(el_item, &mlxsw_core->event_listener_list, list) {
1223                 if (__is_event_listener_equal(&el_item->el, el) &&
1224                     el_item->priv == priv)
1225                         return el_item;
1226         }
1227         return NULL;
1228 }
1229
1230 int mlxsw_core_event_listener_register(struct mlxsw_core *mlxsw_core,
1231                                        const struct mlxsw_event_listener *el,
1232                                        void *priv)
1233 {
1234         int err;
1235         struct mlxsw_event_listener_item *el_item;
1236         const struct mlxsw_rx_listener rxl = {
1237                 .func = mlxsw_core_event_listener_func,
1238                 .local_port = MLXSW_PORT_DONT_CARE,
1239                 .trap_id = el->trap_id,
1240         };
1241
1242         el_item = __find_event_listener_item(mlxsw_core, el, priv);
1243         if (el_item)
1244                 return -EEXIST;
1245         el_item = kmalloc(sizeof(*el_item), GFP_KERNEL);
1246         if (!el_item)
1247                 return -ENOMEM;
1248         el_item->el = *el;
1249         el_item->priv = priv;
1250
1251         err = mlxsw_core_rx_listener_register(mlxsw_core, &rxl, el_item);
1252         if (err)
1253                 goto err_rx_listener_register;
1254
1255         /* No reason to save item if we did not manage to register an RX
1256          * listener for it.
1257          */
1258         list_add_rcu(&el_item->list, &mlxsw_core->event_listener_list);
1259
1260         return 0;
1261
1262 err_rx_listener_register:
1263         kfree(el_item);
1264         return err;
1265 }
1266 EXPORT_SYMBOL(mlxsw_core_event_listener_register);
1267
1268 void mlxsw_core_event_listener_unregister(struct mlxsw_core *mlxsw_core,
1269                                           const struct mlxsw_event_listener *el,
1270                                           void *priv)
1271 {
1272         struct mlxsw_event_listener_item *el_item;
1273         const struct mlxsw_rx_listener rxl = {
1274                 .func = mlxsw_core_event_listener_func,
1275                 .local_port = MLXSW_PORT_DONT_CARE,
1276                 .trap_id = el->trap_id,
1277         };
1278
1279         el_item = __find_event_listener_item(mlxsw_core, el, priv);
1280         if (!el_item)
1281                 return;
1282         mlxsw_core_rx_listener_unregister(mlxsw_core, &rxl, el_item);
1283         list_del(&el_item->list);
1284         kfree(el_item);
1285 }
1286 EXPORT_SYMBOL(mlxsw_core_event_listener_unregister);
1287
1288 static int mlxsw_core_listener_register(struct mlxsw_core *mlxsw_core,
1289                                         const struct mlxsw_listener *listener,
1290                                         void *priv)
1291 {
1292         if (listener->is_event)
1293                 return mlxsw_core_event_listener_register(mlxsw_core,
1294                                                 &listener->u.event_listener,
1295                                                 priv);
1296         else
1297                 return mlxsw_core_rx_listener_register(mlxsw_core,
1298                                                 &listener->u.rx_listener,
1299                                                 priv);
1300 }
1301
1302 static void mlxsw_core_listener_unregister(struct mlxsw_core *mlxsw_core,
1303                                       const struct mlxsw_listener *listener,
1304                                       void *priv)
1305 {
1306         if (listener->is_event)
1307                 mlxsw_core_event_listener_unregister(mlxsw_core,
1308                                                      &listener->u.event_listener,
1309                                                      priv);
1310         else
1311                 mlxsw_core_rx_listener_unregister(mlxsw_core,
1312                                                   &listener->u.rx_listener,
1313                                                   priv);
1314 }
1315
1316 int mlxsw_core_trap_register(struct mlxsw_core *mlxsw_core,
1317                              const struct mlxsw_listener *listener, void *priv)
1318 {
1319         char hpkt_pl[MLXSW_REG_HPKT_LEN];
1320         int err;
1321
1322         err = mlxsw_core_listener_register(mlxsw_core, listener, priv);
1323         if (err)
1324                 return err;
1325
1326         mlxsw_reg_hpkt_pack(hpkt_pl, listener->action, listener->trap_id,
1327                             listener->trap_group, listener->is_ctrl);
1328         err = mlxsw_reg_write(mlxsw_core,  MLXSW_REG(hpkt), hpkt_pl);
1329         if (err)
1330                 goto err_trap_set;
1331
1332         return 0;
1333
1334 err_trap_set:
1335         mlxsw_core_listener_unregister(mlxsw_core, listener, priv);
1336         return err;
1337 }
1338 EXPORT_SYMBOL(mlxsw_core_trap_register);
1339
1340 void mlxsw_core_trap_unregister(struct mlxsw_core *mlxsw_core,
1341                                 const struct mlxsw_listener *listener,
1342                                 void *priv)
1343 {
1344         char hpkt_pl[MLXSW_REG_HPKT_LEN];
1345
1346         if (!listener->is_event) {
1347                 mlxsw_reg_hpkt_pack(hpkt_pl, listener->unreg_action,
1348                                     listener->trap_id, listener->trap_group,
1349                                     listener->is_ctrl);
1350                 mlxsw_reg_write(mlxsw_core, MLXSW_REG(hpkt), hpkt_pl);
1351         }
1352
1353         mlxsw_core_listener_unregister(mlxsw_core, listener, priv);
1354 }
1355 EXPORT_SYMBOL(mlxsw_core_trap_unregister);
1356
1357 static u64 mlxsw_core_tid_get(struct mlxsw_core *mlxsw_core)
1358 {
1359         return atomic64_inc_return(&mlxsw_core->emad.tid);
1360 }
1361
1362 static int mlxsw_core_reg_access_emad(struct mlxsw_core *mlxsw_core,
1363                                       const struct mlxsw_reg_info *reg,
1364                                       char *payload,
1365                                       enum mlxsw_core_reg_access_type type,
1366                                       struct list_head *bulk_list,
1367                                       mlxsw_reg_trans_cb_t *cb,
1368                                       unsigned long cb_priv)
1369 {
1370         u64 tid = mlxsw_core_tid_get(mlxsw_core);
1371         struct mlxsw_reg_trans *trans;
1372         int err;
1373
1374         trans = kzalloc(sizeof(*trans), GFP_KERNEL);
1375         if (!trans)
1376                 return -ENOMEM;
1377
1378         err = mlxsw_emad_reg_access(mlxsw_core, reg, payload, type, trans,
1379                                     bulk_list, cb, cb_priv, tid);
1380         if (err) {
1381                 kfree(trans);
1382                 return err;
1383         }
1384         return 0;
1385 }
1386
1387 int mlxsw_reg_trans_query(struct mlxsw_core *mlxsw_core,
1388                           const struct mlxsw_reg_info *reg, char *payload,
1389                           struct list_head *bulk_list,
1390                           mlxsw_reg_trans_cb_t *cb, unsigned long cb_priv)
1391 {
1392         return mlxsw_core_reg_access_emad(mlxsw_core, reg, payload,
1393                                           MLXSW_CORE_REG_ACCESS_TYPE_QUERY,
1394                                           bulk_list, cb, cb_priv);
1395 }
1396 EXPORT_SYMBOL(mlxsw_reg_trans_query);
1397
1398 int mlxsw_reg_trans_write(struct mlxsw_core *mlxsw_core,
1399                           const struct mlxsw_reg_info *reg, char *payload,
1400                           struct list_head *bulk_list,
1401                           mlxsw_reg_trans_cb_t *cb, unsigned long cb_priv)
1402 {
1403         return mlxsw_core_reg_access_emad(mlxsw_core, reg, payload,
1404                                           MLXSW_CORE_REG_ACCESS_TYPE_WRITE,
1405                                           bulk_list, cb, cb_priv);
1406 }
1407 EXPORT_SYMBOL(mlxsw_reg_trans_write);
1408
1409 static int mlxsw_reg_trans_wait(struct mlxsw_reg_trans *trans)
1410 {
1411         struct mlxsw_core *mlxsw_core = trans->core;
1412         int err;
1413
1414         wait_for_completion(&trans->completion);
1415         cancel_delayed_work_sync(&trans->timeout_dw);
1416         err = trans->err;
1417
1418         if (trans->retries)
1419                 dev_warn(mlxsw_core->bus_info->dev, "EMAD retries (%d/%d) (tid=%llx)\n",
1420                          trans->retries, MLXSW_EMAD_MAX_RETRY, trans->tid);
1421         if (err)
1422                 dev_err(mlxsw_core->bus_info->dev, "EMAD reg access failed (tid=%llx,reg_id=%x(%s),type=%s,status=%x(%s))\n",
1423                         trans->tid, trans->reg->id,
1424                         mlxsw_reg_id_str(trans->reg->id),
1425                         mlxsw_core_reg_access_type_str(trans->type),
1426                         trans->emad_status,
1427                         mlxsw_emad_op_tlv_status_str(trans->emad_status));
1428
1429         list_del(&trans->bulk_list);
1430         kfree_rcu(trans, rcu);
1431         return err;
1432 }
1433
1434 int mlxsw_reg_trans_bulk_wait(struct list_head *bulk_list)
1435 {
1436         struct mlxsw_reg_trans *trans;
1437         struct mlxsw_reg_trans *tmp;
1438         int sum_err = 0;
1439         int err;
1440
1441         list_for_each_entry_safe(trans, tmp, bulk_list, bulk_list) {
1442                 err = mlxsw_reg_trans_wait(trans);
1443                 if (err && sum_err == 0)
1444                         sum_err = err; /* first error to be returned */
1445         }
1446         return sum_err;
1447 }
1448 EXPORT_SYMBOL(mlxsw_reg_trans_bulk_wait);
1449
1450 static int mlxsw_core_reg_access_cmd(struct mlxsw_core *mlxsw_core,
1451                                      const struct mlxsw_reg_info *reg,
1452                                      char *payload,
1453                                      enum mlxsw_core_reg_access_type type)
1454 {
1455         enum mlxsw_emad_op_tlv_status status;
1456         int err, n_retry;
1457         bool reset_ok;
1458         char *in_mbox, *out_mbox, *tmp;
1459
1460         dev_dbg(mlxsw_core->bus_info->dev, "Reg cmd access (reg_id=%x(%s),type=%s)\n",
1461                 reg->id, mlxsw_reg_id_str(reg->id),
1462                 mlxsw_core_reg_access_type_str(type));
1463
1464         in_mbox = mlxsw_cmd_mbox_alloc();
1465         if (!in_mbox)
1466                 return -ENOMEM;
1467
1468         out_mbox = mlxsw_cmd_mbox_alloc();
1469         if (!out_mbox) {
1470                 err = -ENOMEM;
1471                 goto free_in_mbox;
1472         }
1473
1474         mlxsw_emad_pack_op_tlv(in_mbox, reg, type,
1475                                mlxsw_core_tid_get(mlxsw_core));
1476         tmp = in_mbox + MLXSW_EMAD_OP_TLV_LEN * sizeof(u32);
1477         mlxsw_emad_pack_reg_tlv(tmp, reg, payload);
1478
1479         /* There is a special treatment needed for MRSR (reset) register.
1480          * The command interface will return error after the command
1481          * is executed, so tell the lower layer to expect it
1482          * and cope accordingly.
1483          */
1484         reset_ok = reg->id == MLXSW_REG_MRSR_ID;
1485
1486         n_retry = 0;
1487 retry:
1488         err = mlxsw_cmd_access_reg(mlxsw_core, reset_ok, in_mbox, out_mbox);
1489         if (!err) {
1490                 err = mlxsw_emad_process_status(out_mbox, &status);
1491                 if (err) {
1492                         if (err == -EAGAIN && n_retry++ < MLXSW_EMAD_MAX_RETRY)
1493                                 goto retry;
1494                         dev_err(mlxsw_core->bus_info->dev, "Reg cmd access status failed (status=%x(%s))\n",
1495                                 status, mlxsw_emad_op_tlv_status_str(status));
1496                 }
1497         }
1498
1499         if (!err)
1500                 memcpy(payload, mlxsw_emad_reg_payload(out_mbox),
1501                        reg->len);
1502
1503         mlxsw_cmd_mbox_free(out_mbox);
1504 free_in_mbox:
1505         mlxsw_cmd_mbox_free(in_mbox);
1506         if (err)
1507                 dev_err(mlxsw_core->bus_info->dev, "Reg cmd access failed (reg_id=%x(%s),type=%s)\n",
1508                         reg->id, mlxsw_reg_id_str(reg->id),
1509                         mlxsw_core_reg_access_type_str(type));
1510         return err;
1511 }
1512
1513 static void mlxsw_core_reg_access_cb(struct mlxsw_core *mlxsw_core,
1514                                      char *payload, size_t payload_len,
1515                                      unsigned long cb_priv)
1516 {
1517         char *orig_payload = (char *) cb_priv;
1518
1519         memcpy(orig_payload, payload, payload_len);
1520 }
1521
1522 static int mlxsw_core_reg_access(struct mlxsw_core *mlxsw_core,
1523                                  const struct mlxsw_reg_info *reg,
1524                                  char *payload,
1525                                  enum mlxsw_core_reg_access_type type)
1526 {
1527         LIST_HEAD(bulk_list);
1528         int err;
1529
1530         /* During initialization EMAD interface is not available to us,
1531          * so we default to command interface. We switch to EMAD interface
1532          * after setting the appropriate traps.
1533          */
1534         if (!mlxsw_core->emad.use_emad)
1535                 return mlxsw_core_reg_access_cmd(mlxsw_core, reg,
1536                                                  payload, type);
1537
1538         err = mlxsw_core_reg_access_emad(mlxsw_core, reg,
1539                                          payload, type, &bulk_list,
1540                                          mlxsw_core_reg_access_cb,
1541                                          (unsigned long) payload);
1542         if (err)
1543                 return err;
1544         return mlxsw_reg_trans_bulk_wait(&bulk_list);
1545 }
1546
1547 int mlxsw_reg_query(struct mlxsw_core *mlxsw_core,
1548                     const struct mlxsw_reg_info *reg, char *payload)
1549 {
1550         return mlxsw_core_reg_access(mlxsw_core, reg, payload,
1551                                      MLXSW_CORE_REG_ACCESS_TYPE_QUERY);
1552 }
1553 EXPORT_SYMBOL(mlxsw_reg_query);
1554
1555 int mlxsw_reg_write(struct mlxsw_core *mlxsw_core,
1556                     const struct mlxsw_reg_info *reg, char *payload)
1557 {
1558         return mlxsw_core_reg_access(mlxsw_core, reg, payload,
1559                                      MLXSW_CORE_REG_ACCESS_TYPE_WRITE);
1560 }
1561 EXPORT_SYMBOL(mlxsw_reg_write);
1562
1563 void mlxsw_core_skb_receive(struct mlxsw_core *mlxsw_core, struct sk_buff *skb,
1564                             struct mlxsw_rx_info *rx_info)
1565 {
1566         struct mlxsw_rx_listener_item *rxl_item;
1567         const struct mlxsw_rx_listener *rxl;
1568         u8 local_port;
1569         bool found = false;
1570
1571         if (rx_info->is_lag) {
1572                 dev_dbg_ratelimited(mlxsw_core->bus_info->dev, "%s: lag_id = %d, lag_port_index = 0x%x\n",
1573                                     __func__, rx_info->u.lag_id,
1574                                     rx_info->trap_id);
1575                 /* Upper layer does not care if the skb came from LAG or not,
1576                  * so just get the local_port for the lag port and push it up.
1577                  */
1578                 local_port = mlxsw_core_lag_mapping_get(mlxsw_core,
1579                                                         rx_info->u.lag_id,
1580                                                         rx_info->lag_port_index);
1581         } else {
1582                 local_port = rx_info->u.sys_port;
1583         }
1584
1585         dev_dbg_ratelimited(mlxsw_core->bus_info->dev, "%s: local_port = %d, trap_id = 0x%x\n",
1586                             __func__, local_port, rx_info->trap_id);
1587
1588         if ((rx_info->trap_id >= MLXSW_TRAP_ID_MAX) ||
1589             (local_port >= mlxsw_core->max_ports))
1590                 goto drop;
1591
1592         rcu_read_lock();
1593         list_for_each_entry_rcu(rxl_item, &mlxsw_core->rx_listener_list, list) {
1594                 rxl = &rxl_item->rxl;
1595                 if ((rxl->local_port == MLXSW_PORT_DONT_CARE ||
1596                      rxl->local_port == local_port) &&
1597                     rxl->trap_id == rx_info->trap_id) {
1598                         found = true;
1599                         break;
1600                 }
1601         }
1602         rcu_read_unlock();
1603         if (!found)
1604                 goto drop;
1605
1606         rxl->func(skb, local_port, rxl_item->priv);
1607         return;
1608
1609 drop:
1610         dev_kfree_skb(skb);
1611 }
1612 EXPORT_SYMBOL(mlxsw_core_skb_receive);
1613
1614 static int mlxsw_core_lag_mapping_index(struct mlxsw_core *mlxsw_core,
1615                                         u16 lag_id, u8 port_index)
1616 {
1617         return MLXSW_CORE_RES_GET(mlxsw_core, MAX_LAG_MEMBERS) * lag_id +
1618                port_index;
1619 }
1620
1621 void mlxsw_core_lag_mapping_set(struct mlxsw_core *mlxsw_core,
1622                                 u16 lag_id, u8 port_index, u8 local_port)
1623 {
1624         int index = mlxsw_core_lag_mapping_index(mlxsw_core,
1625                                                  lag_id, port_index);
1626
1627         mlxsw_core->lag.mapping[index] = local_port;
1628 }
1629 EXPORT_SYMBOL(mlxsw_core_lag_mapping_set);
1630
1631 u8 mlxsw_core_lag_mapping_get(struct mlxsw_core *mlxsw_core,
1632                               u16 lag_id, u8 port_index)
1633 {
1634         int index = mlxsw_core_lag_mapping_index(mlxsw_core,
1635                                                  lag_id, port_index);
1636
1637         return mlxsw_core->lag.mapping[index];
1638 }
1639 EXPORT_SYMBOL(mlxsw_core_lag_mapping_get);
1640
1641 void mlxsw_core_lag_mapping_clear(struct mlxsw_core *mlxsw_core,
1642                                   u16 lag_id, u8 local_port)
1643 {
1644         int i;
1645
1646         for (i = 0; i < MLXSW_CORE_RES_GET(mlxsw_core, MAX_LAG_MEMBERS); i++) {
1647                 int index = mlxsw_core_lag_mapping_index(mlxsw_core,
1648                                                          lag_id, i);
1649
1650                 if (mlxsw_core->lag.mapping[index] == local_port)
1651                         mlxsw_core->lag.mapping[index] = 0;
1652         }
1653 }
1654 EXPORT_SYMBOL(mlxsw_core_lag_mapping_clear);
1655
1656 bool mlxsw_core_res_valid(struct mlxsw_core *mlxsw_core,
1657                           enum mlxsw_res_id res_id)
1658 {
1659         return mlxsw_res_valid(&mlxsw_core->res, res_id);
1660 }
1661 EXPORT_SYMBOL(mlxsw_core_res_valid);
1662
1663 u64 mlxsw_core_res_get(struct mlxsw_core *mlxsw_core,
1664                        enum mlxsw_res_id res_id)
1665 {
1666         return mlxsw_res_get(&mlxsw_core->res, res_id);
1667 }
1668 EXPORT_SYMBOL(mlxsw_core_res_get);
1669
1670 int mlxsw_core_port_init(struct mlxsw_core *mlxsw_core, u8 local_port)
1671 {
1672         struct devlink *devlink = priv_to_devlink(mlxsw_core);
1673         struct mlxsw_core_port *mlxsw_core_port =
1674                                         &mlxsw_core->ports[local_port];
1675         struct devlink_port *devlink_port = &mlxsw_core_port->devlink_port;
1676         int err;
1677
1678         mlxsw_core_port->local_port = local_port;
1679         err = devlink_port_register(devlink, devlink_port, local_port);
1680         if (err)
1681                 memset(mlxsw_core_port, 0, sizeof(*mlxsw_core_port));
1682         return err;
1683 }
1684 EXPORT_SYMBOL(mlxsw_core_port_init);
1685
1686 void mlxsw_core_port_fini(struct mlxsw_core *mlxsw_core, u8 local_port)
1687 {
1688         struct mlxsw_core_port *mlxsw_core_port =
1689                                         &mlxsw_core->ports[local_port];
1690         struct devlink_port *devlink_port = &mlxsw_core_port->devlink_port;
1691
1692         devlink_port_unregister(devlink_port);
1693         memset(mlxsw_core_port, 0, sizeof(*mlxsw_core_port));
1694 }
1695 EXPORT_SYMBOL(mlxsw_core_port_fini);
1696
1697 void mlxsw_core_port_eth_set(struct mlxsw_core *mlxsw_core, u8 local_port,
1698                              void *port_driver_priv, struct net_device *dev,
1699                              u32 port_number, bool split,
1700                              u32 split_port_subnumber)
1701 {
1702         struct mlxsw_core_port *mlxsw_core_port =
1703                                         &mlxsw_core->ports[local_port];
1704         struct devlink_port *devlink_port = &mlxsw_core_port->devlink_port;
1705
1706         mlxsw_core_port->port_driver_priv = port_driver_priv;
1707         devlink_port_attrs_set(devlink_port, DEVLINK_PORT_FLAVOUR_PHYSICAL,
1708                                port_number, split, split_port_subnumber);
1709         devlink_port_type_eth_set(devlink_port, dev);
1710 }
1711 EXPORT_SYMBOL(mlxsw_core_port_eth_set);
1712
1713 void mlxsw_core_port_ib_set(struct mlxsw_core *mlxsw_core, u8 local_port,
1714                             void *port_driver_priv)
1715 {
1716         struct mlxsw_core_port *mlxsw_core_port =
1717                                         &mlxsw_core->ports[local_port];
1718         struct devlink_port *devlink_port = &mlxsw_core_port->devlink_port;
1719
1720         mlxsw_core_port->port_driver_priv = port_driver_priv;
1721         devlink_port_type_ib_set(devlink_port, NULL);
1722 }
1723 EXPORT_SYMBOL(mlxsw_core_port_ib_set);
1724
1725 void mlxsw_core_port_clear(struct mlxsw_core *mlxsw_core, u8 local_port,
1726                            void *port_driver_priv)
1727 {
1728         struct mlxsw_core_port *mlxsw_core_port =
1729                                         &mlxsw_core->ports[local_port];
1730         struct devlink_port *devlink_port = &mlxsw_core_port->devlink_port;
1731
1732         mlxsw_core_port->port_driver_priv = port_driver_priv;
1733         devlink_port_type_clear(devlink_port);
1734 }
1735 EXPORT_SYMBOL(mlxsw_core_port_clear);
1736
1737 enum devlink_port_type mlxsw_core_port_type_get(struct mlxsw_core *mlxsw_core,
1738                                                 u8 local_port)
1739 {
1740         struct mlxsw_core_port *mlxsw_core_port =
1741                                         &mlxsw_core->ports[local_port];
1742         struct devlink_port *devlink_port = &mlxsw_core_port->devlink_port;
1743
1744         return devlink_port->type;
1745 }
1746 EXPORT_SYMBOL(mlxsw_core_port_type_get);
1747
1748 int mlxsw_core_port_get_phys_port_name(struct mlxsw_core *mlxsw_core,
1749                                        u8 local_port, char *name, size_t len)
1750 {
1751         struct mlxsw_core_port *mlxsw_core_port =
1752                                         &mlxsw_core->ports[local_port];
1753         struct devlink_port *devlink_port = &mlxsw_core_port->devlink_port;
1754
1755         return devlink_port_get_phys_port_name(devlink_port, name, len);
1756 }
1757 EXPORT_SYMBOL(mlxsw_core_port_get_phys_port_name);
1758
1759 static void mlxsw_core_buf_dump_dbg(struct mlxsw_core *mlxsw_core,
1760                                     const char *buf, size_t size)
1761 {
1762         __be32 *m = (__be32 *) buf;
1763         int i;
1764         int count = size / sizeof(__be32);
1765
1766         for (i = count - 1; i >= 0; i--)
1767                 if (m[i])
1768                         break;
1769         i++;
1770         count = i ? i : 1;
1771         for (i = 0; i < count; i += 4)
1772                 dev_dbg(mlxsw_core->bus_info->dev, "%04x - %08x %08x %08x %08x\n",
1773                         i * 4, be32_to_cpu(m[i]), be32_to_cpu(m[i + 1]),
1774                         be32_to_cpu(m[i + 2]), be32_to_cpu(m[i + 3]));
1775 }
1776
1777 int mlxsw_cmd_exec(struct mlxsw_core *mlxsw_core, u16 opcode, u8 opcode_mod,
1778                    u32 in_mod, bool out_mbox_direct, bool reset_ok,
1779                    char *in_mbox, size_t in_mbox_size,
1780                    char *out_mbox, size_t out_mbox_size)
1781 {
1782         u8 status;
1783         int err;
1784
1785         BUG_ON(in_mbox_size % sizeof(u32) || out_mbox_size % sizeof(u32));
1786         if (!mlxsw_core->bus->cmd_exec)
1787                 return -EOPNOTSUPP;
1788
1789         dev_dbg(mlxsw_core->bus_info->dev, "Cmd exec (opcode=%x(%s),opcode_mod=%x,in_mod=%x)\n",
1790                 opcode, mlxsw_cmd_opcode_str(opcode), opcode_mod, in_mod);
1791         if (in_mbox) {
1792                 dev_dbg(mlxsw_core->bus_info->dev, "Input mailbox:\n");
1793                 mlxsw_core_buf_dump_dbg(mlxsw_core, in_mbox, in_mbox_size);
1794         }
1795
1796         err = mlxsw_core->bus->cmd_exec(mlxsw_core->bus_priv, opcode,
1797                                         opcode_mod, in_mod, out_mbox_direct,
1798                                         in_mbox, in_mbox_size,
1799                                         out_mbox, out_mbox_size, &status);
1800
1801         if (!err && out_mbox) {
1802                 dev_dbg(mlxsw_core->bus_info->dev, "Output mailbox:\n");
1803                 mlxsw_core_buf_dump_dbg(mlxsw_core, out_mbox, out_mbox_size);
1804         }
1805
1806         if (reset_ok && err == -EIO &&
1807             status == MLXSW_CMD_STATUS_RUNNING_RESET) {
1808                 err = 0;
1809         } else if (err == -EIO && status != MLXSW_CMD_STATUS_OK) {
1810                 dev_err(mlxsw_core->bus_info->dev, "Cmd exec failed (opcode=%x(%s),opcode_mod=%x,in_mod=%x,status=%x(%s))\n",
1811                         opcode, mlxsw_cmd_opcode_str(opcode), opcode_mod,
1812                         in_mod, status, mlxsw_cmd_status_str(status));
1813         } else if (err == -ETIMEDOUT) {
1814                 dev_err(mlxsw_core->bus_info->dev, "Cmd exec timed-out (opcode=%x(%s),opcode_mod=%x,in_mod=%x)\n",
1815                         opcode, mlxsw_cmd_opcode_str(opcode), opcode_mod,
1816                         in_mod);
1817         }
1818
1819         return err;
1820 }
1821 EXPORT_SYMBOL(mlxsw_cmd_exec);
1822
1823 int mlxsw_core_schedule_dw(struct delayed_work *dwork, unsigned long delay)
1824 {
1825         return queue_delayed_work(mlxsw_wq, dwork, delay);
1826 }
1827 EXPORT_SYMBOL(mlxsw_core_schedule_dw);
1828
1829 bool mlxsw_core_schedule_work(struct work_struct *work)
1830 {
1831         return queue_work(mlxsw_owq, work);
1832 }
1833 EXPORT_SYMBOL(mlxsw_core_schedule_work);
1834
1835 void mlxsw_core_flush_owq(void)
1836 {
1837         flush_workqueue(mlxsw_owq);
1838 }
1839 EXPORT_SYMBOL(mlxsw_core_flush_owq);
1840
1841 int mlxsw_core_kvd_sizes_get(struct mlxsw_core *mlxsw_core,
1842                              const struct mlxsw_config_profile *profile,
1843                              u64 *p_single_size, u64 *p_double_size,
1844                              u64 *p_linear_size)
1845 {
1846         struct mlxsw_driver *driver = mlxsw_core->driver;
1847
1848         if (!driver->kvd_sizes_get)
1849                 return -EINVAL;
1850
1851         return driver->kvd_sizes_get(mlxsw_core, profile,
1852                                      p_single_size, p_double_size,
1853                                      p_linear_size);
1854 }
1855 EXPORT_SYMBOL(mlxsw_core_kvd_sizes_get);
1856
1857 static int __init mlxsw_core_module_init(void)
1858 {
1859         int err;
1860
1861         mlxsw_wq = alloc_workqueue(mlxsw_core_driver_name, WQ_MEM_RECLAIM, 0);
1862         if (!mlxsw_wq)
1863                 return -ENOMEM;
1864         mlxsw_owq = alloc_ordered_workqueue("%s_ordered", WQ_MEM_RECLAIM,
1865                                             mlxsw_core_driver_name);
1866         if (!mlxsw_owq) {
1867                 err = -ENOMEM;
1868                 goto err_alloc_ordered_workqueue;
1869         }
1870         return 0;
1871
1872 err_alloc_ordered_workqueue:
1873         destroy_workqueue(mlxsw_wq);
1874         return err;
1875 }
1876
1877 static void __exit mlxsw_core_module_exit(void)
1878 {
1879         destroy_workqueue(mlxsw_owq);
1880         destroy_workqueue(mlxsw_wq);
1881 }
1882
1883 module_init(mlxsw_core_module_init);
1884 module_exit(mlxsw_core_module_exit);
1885
1886 MODULE_LICENSE("Dual BSD/GPL");
1887 MODULE_AUTHOR("Jiri Pirko <jiri@mellanox.com>");
1888 MODULE_DESCRIPTION("Mellanox switch device core driver");