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

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