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

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