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

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