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", WQ_MEM_RECLAIM, 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 mlxsw_devlink_core_bus_device_reload(struct devlink *devlink,
 938                                                 struct netlink_ext_ack *extack)
 939 {
 940         struct mlxsw_core *mlxsw_core = devlink_priv(devlink);
 941         int err;
 942
 943         if (!(mlxsw_core->bus->features & MLXSW_BUS_F_RESET))
 944                 return -EOPNOTSUPP;
 945
 946         mlxsw_core_bus_device_unregister(mlxsw_core, true);
 947         err = mlxsw_core_bus_device_register(mlxsw_core->bus_info,
 948                                              mlxsw_core->bus,
 949                                              mlxsw_core->bus_priv, true,
 950                                              devlink);
 951         mlxsw_core->reload_fail = !!err;
 952
 953         return err;
 954 }
 955
 956 static const struct devlink_ops mlxsw_devlink_ops = {
 957         .reload                         = mlxsw_devlink_core_bus_device_reload,
 958         .port_type_set                  = mlxsw_devlink_port_type_set,
 959         .port_split                     = mlxsw_devlink_port_split,
 960         .port_unsplit                   = mlxsw_devlink_port_unsplit,
 961         .sb_pool_get                    = mlxsw_devlink_sb_pool_get,
 962         .sb_pool_set                    = mlxsw_devlink_sb_pool_set,
 963         .sb_port_pool_get               = mlxsw_devlink_sb_port_pool_get,
 964         .sb_port_pool_set               = mlxsw_devlink_sb_port_pool_set,
 965         .sb_tc_pool_bind_get            = mlxsw_devlink_sb_tc_pool_bind_get,
 966         .sb_tc_pool_bind_set            = mlxsw_devlink_sb_tc_pool_bind_set,
 967         .sb_occ_snapshot                = mlxsw_devlink_sb_occ_snapshot,
 968         .sb_occ_max_clear               = mlxsw_devlink_sb_occ_max_clear,
 969         .sb_occ_port_pool_get           = mlxsw_devlink_sb_occ_port_pool_get,
 970         .sb_occ_tc_port_bind_get        = mlxsw_devlink_sb_occ_tc_port_bind_get,
 971 };
 972
 973 static int
 974 __mlxsw_core_bus_device_register(const struct mlxsw_bus_info *mlxsw_bus_info,
 975                                  const struct mlxsw_bus *mlxsw_bus,
 976                                  void *bus_priv, bool reload,
 977                                  struct devlink *devlink)
 978 {
 979         const char *device_kind = mlxsw_bus_info->device_kind;
 980         struct mlxsw_core *mlxsw_core;
 981         struct mlxsw_driver *mlxsw_driver;
 982         struct mlxsw_res *res;
 983         size_t alloc_size;
 984         int err;
 985
 986         mlxsw_driver = mlxsw_core_driver_get(device_kind);
 987         if (!mlxsw_driver)
 988                 return -EINVAL;
 989
 990         if (!reload) {
 991                 alloc_size = sizeof(*mlxsw_core) + mlxsw_driver->priv_size;
 992                 devlink = devlink_alloc(&mlxsw_devlink_ops, alloc_size);
 993                 if (!devlink) {
 994                         err = -ENOMEM;
 995                         goto err_devlink_alloc;
 996                 }
 997         }
 998
 999         mlxsw_core = devlink_priv(devlink);
1000         INIT_LIST_HEAD(&mlxsw_core->rx_listener_list);
1001         INIT_LIST_HEAD(&mlxsw_core->event_listener_list);
1002         mlxsw_core->driver = mlxsw_driver;
1003         mlxsw_core->bus = mlxsw_bus;
1004         mlxsw_core->bus_priv = bus_priv;
1005         mlxsw_core->bus_info = mlxsw_bus_info;
1006
1007         res = mlxsw_driver->res_query_enabled ? &mlxsw_core->res : NULL;
1008         err = mlxsw_bus->init(bus_priv, mlxsw_core, mlxsw_driver->profile, res);
1009         if (err)
1010                 goto err_bus_init;
1011
1012         if (mlxsw_driver->resources_register && !reload) {
1013                 err = mlxsw_driver->resources_register(mlxsw_core);
1014                 if (err)
1015                         goto err_register_resources;
1016         }
1017
1018         err = mlxsw_ports_init(mlxsw_core);
1019         if (err)
1020                 goto err_ports_init;
1021
1022         if (MLXSW_CORE_RES_VALID(mlxsw_core, MAX_LAG) &&
1023             MLXSW_CORE_RES_VALID(mlxsw_core, MAX_LAG_MEMBERS)) {
1024                 alloc_size = sizeof(u8) *
1025                         MLXSW_CORE_RES_GET(mlxsw_core, MAX_LAG) *
1026                         MLXSW_CORE_RES_GET(mlxsw_core, MAX_LAG_MEMBERS);
1027                 mlxsw_core->lag.mapping = kzalloc(alloc_size, GFP_KERNEL);
1028                 if (!mlxsw_core->lag.mapping) {
1029                         err = -ENOMEM;
1030                         goto err_alloc_lag_mapping;
1031                 }
1032         }
1033
1034         err = mlxsw_emad_init(mlxsw_core);
1035         if (err)
1036                 goto err_emad_init;
1037
1038         if (!reload) {
1039                 err = devlink_register(devlink, mlxsw_bus_info->dev);
1040                 if (err)
1041                         goto err_devlink_register;
1042         }
1043
1044         if (mlxsw_driver->params_register && !reload) {
1045                 err = mlxsw_driver->params_register(mlxsw_core);
1046                 if (err)
1047                         goto err_register_params;
1048         }
1049
1050         err = mlxsw_hwmon_init(mlxsw_core, mlxsw_bus_info, &mlxsw_core->hwmon);
1051         if (err)
1052                 goto err_hwmon_init;
1053
1054         err = mlxsw_thermal_init(mlxsw_core, mlxsw_bus_info,
1055                                  &mlxsw_core->thermal);
1056         if (err)
1057                 goto err_thermal_init;
1058
1059         if (mlxsw_driver->init) {
1060                 err = mlxsw_driver->init(mlxsw_core, mlxsw_bus_info);
1061                 if (err)
1062                         goto err_driver_init;
1063         }
1064
1065         if (mlxsw_driver->params_register && !reload)
1066                 devlink_params_publish(devlink);
1067
1068         return 0;
1069
1070 err_driver_init:
1071         mlxsw_thermal_fini(mlxsw_core->thermal);
1072 err_thermal_init:
1073         mlxsw_hwmon_fini(mlxsw_core->hwmon);
1074 err_hwmon_init:
1075         if (mlxsw_driver->params_unregister && !reload)
1076                 mlxsw_driver->params_unregister(mlxsw_core);
1077 err_register_params:
1078         if (!reload)
1079                 devlink_unregister(devlink);
1080 err_devlink_register:
1081         mlxsw_emad_fini(mlxsw_core);
1082 err_emad_init:
1083         kfree(mlxsw_core->lag.mapping);
1084 err_alloc_lag_mapping:
1085         mlxsw_ports_fini(mlxsw_core);
1086 err_ports_init:
1087         if (!reload)
1088                 devlink_resources_unregister(devlink, NULL);
1089 err_register_resources:
1090         mlxsw_bus->fini(bus_priv);
1091 err_bus_init:
1092         if (!reload)
1093                 devlink_free(devlink);
1094 err_devlink_alloc:
1095         return err;
1096 }
1097
1098 int mlxsw_core_bus_device_register(const struct mlxsw_bus_info *mlxsw_bus_info,
1099                                    const struct mlxsw_bus *mlxsw_bus,
1100                                    void *bus_priv, bool reload,
1101                                    struct devlink *devlink)
1102 {
1103         bool called_again = false;
1104         int err;
1105
1106 again:
1107         err = __mlxsw_core_bus_device_register(mlxsw_bus_info, mlxsw_bus,
1108                                                bus_priv, reload, devlink);
1109         /* -EAGAIN is returned in case the FW was updated. FW needs
1110          * a reset, so lets try to call __mlxsw_core_bus_device_register()
1111          * again.
1112          */
1113         if (err == -EAGAIN && !called_again) {
1114                 called_again = true;
1115                 goto again;
1116         }
1117
1118         return err;
1119 }
1120 EXPORT_SYMBOL(mlxsw_core_bus_device_register);
1121
1122 void mlxsw_core_bus_device_unregister(struct mlxsw_core *mlxsw_core,
1123                                       bool reload)
1124 {
1125         struct devlink *devlink = priv_to_devlink(mlxsw_core);
1126
1127         if (mlxsw_core->reload_fail) {
1128                 if (!reload)
1129                         /* Only the parts that were not de-initialized in the
1130                          * failed reload attempt need to be de-initialized.
1131                          */
1132                         goto reload_fail_deinit;
1133                 else
1134                         return;
1135         }
1136
1137         if (mlxsw_core->driver->params_unregister && !reload)
1138                 devlink_params_unpublish(devlink);
1139         if (mlxsw_core->driver->fini)
1140                 mlxsw_core->driver->fini(mlxsw_core);
1141         mlxsw_thermal_fini(mlxsw_core->thermal);
1142         mlxsw_hwmon_fini(mlxsw_core->hwmon);
1143         if (mlxsw_core->driver->params_unregister && !reload)
1144                 mlxsw_core->driver->params_unregister(mlxsw_core);
1145         if (!reload)
1146                 devlink_unregister(devlink);
1147         mlxsw_emad_fini(mlxsw_core);
1148         kfree(mlxsw_core->lag.mapping);
1149         mlxsw_ports_fini(mlxsw_core);
1150         if (!reload)
1151                 devlink_resources_unregister(devlink, NULL);
1152         mlxsw_core->bus->fini(mlxsw_core->bus_priv);
1153
1154         return;
1155
1156 reload_fail_deinit:
1157         if (mlxsw_core->driver->params_unregister)
1158                 mlxsw_core->driver->params_unregister(mlxsw_core);
1159         devlink_unregister(devlink);
1160         devlink_resources_unregister(devlink, NULL);
1161         devlink_free(devlink);
1162 }
1163 EXPORT_SYMBOL(mlxsw_core_bus_device_unregister);
1164
1165 bool mlxsw_core_skb_transmit_busy(struct mlxsw_core *mlxsw_core,
1166                                   const struct mlxsw_tx_info *tx_info)
1167 {
1168         return mlxsw_core->bus->skb_transmit_busy(mlxsw_core->bus_priv,
1169                                                   tx_info);
1170 }
1171 EXPORT_SYMBOL(mlxsw_core_skb_transmit_busy);
1172
1173 int mlxsw_core_skb_transmit(struct mlxsw_core *mlxsw_core, struct sk_buff *skb,
1174                             const struct mlxsw_tx_info *tx_info)
1175 {
1176         return mlxsw_core->bus->skb_transmit(mlxsw_core->bus_priv, skb,
1177                                              tx_info);
1178 }
1179 EXPORT_SYMBOL(mlxsw_core_skb_transmit);
1180
1181 static bool __is_rx_listener_equal(const struct mlxsw_rx_listener *rxl_a,
1182                                    const struct mlxsw_rx_listener *rxl_b)
1183 {
1184         return (rxl_a->func == rxl_b->func &&
1185                 rxl_a->local_port == rxl_b->local_port &&
1186                 rxl_a->trap_id == rxl_b->trap_id);
1187 }
1188
1189 static struct mlxsw_rx_listener_item *
1190 __find_rx_listener_item(struct mlxsw_core *mlxsw_core,
1191                         const struct mlxsw_rx_listener *rxl,
1192                         void *priv)
1193 {
1194         struct mlxsw_rx_listener_item *rxl_item;
1195
1196         list_for_each_entry(rxl_item, &mlxsw_core->rx_listener_list, list) {
1197                 if (__is_rx_listener_equal(&rxl_item->rxl, rxl) &&
1198                     rxl_item->priv == priv)
1199                         return rxl_item;
1200         }
1201         return NULL;
1202 }
1203
1204 int mlxsw_core_rx_listener_register(struct mlxsw_core *mlxsw_core,
1205                                     const struct mlxsw_rx_listener *rxl,
1206                                     void *priv)
1207 {
1208         struct mlxsw_rx_listener_item *rxl_item;
1209
1210         rxl_item = __find_rx_listener_item(mlxsw_core, rxl, priv);
1211         if (rxl_item)
1212                 return -EEXIST;
1213         rxl_item = kmalloc(sizeof(*rxl_item), GFP_KERNEL);
1214         if (!rxl_item)
1215                 return -ENOMEM;
1216         rxl_item->rxl = *rxl;
1217         rxl_item->priv = priv;
1218
1219         list_add_rcu(&rxl_item->list, &mlxsw_core->rx_listener_list);
1220         return 0;
1221 }
1222 EXPORT_SYMBOL(mlxsw_core_rx_listener_register);
1223
1224 void mlxsw_core_rx_listener_unregister(struct mlxsw_core *mlxsw_core,
1225                                        const struct mlxsw_rx_listener *rxl,
1226                                        void *priv)
1227 {
1228         struct mlxsw_rx_listener_item *rxl_item;
1229
1230         rxl_item = __find_rx_listener_item(mlxsw_core, rxl, priv);
1231         if (!rxl_item)
1232                 return;
1233         list_del_rcu(&rxl_item->list);
1234         synchronize_rcu();
1235         kfree(rxl_item);
1236 }
1237 EXPORT_SYMBOL(mlxsw_core_rx_listener_unregister);
1238
1239 static void mlxsw_core_event_listener_func(struct sk_buff *skb, u8 local_port,
1240                                            void *priv)
1241 {
1242         struct mlxsw_event_listener_item *event_listener_item = priv;
1243         struct mlxsw_reg_info reg;
1244         char *payload;
1245         char *op_tlv = mlxsw_emad_op_tlv(skb);
1246         char *reg_tlv = mlxsw_emad_reg_tlv(skb);
1247
1248         reg.id = mlxsw_emad_op_tlv_register_id_get(op_tlv);
1249         reg.len = (mlxsw_emad_reg_tlv_len_get(reg_tlv) - 1) * sizeof(u32);
1250         payload = mlxsw_emad_reg_payload(op_tlv);
1251         event_listener_item->el.func(&reg, payload, event_listener_item->priv);
1252         dev_kfree_skb(skb);
1253 }
1254
1255 static bool __is_event_listener_equal(const struct mlxsw_event_listener *el_a,
1256                                       const struct mlxsw_event_listener *el_b)
1257 {
1258         return (el_a->func == el_b->func &&
1259                 el_a->trap_id == el_b->trap_id);
1260 }
1261
1262 static struct mlxsw_event_listener_item *
1263 __find_event_listener_item(struct mlxsw_core *mlxsw_core,
1264                            const struct mlxsw_event_listener *el,
1265                            void *priv)
1266 {
1267         struct mlxsw_event_listener_item *el_item;
1268
1269         list_for_each_entry(el_item, &mlxsw_core->event_listener_list, list) {
1270                 if (__is_event_listener_equal(&el_item->el, el) &&
1271                     el_item->priv == priv)
1272                         return el_item;
1273         }
1274         return NULL;
1275 }
1276
1277 int mlxsw_core_event_listener_register(struct mlxsw_core *mlxsw_core,
1278                                        const struct mlxsw_event_listener *el,
1279                                        void *priv)
1280 {
1281         int err;
1282         struct mlxsw_event_listener_item *el_item;
1283         const struct mlxsw_rx_listener rxl = {
1284                 .func = mlxsw_core_event_listener_func,
1285                 .local_port = MLXSW_PORT_DONT_CARE,
1286                 .trap_id = el->trap_id,
1287         };
1288
1289         el_item = __find_event_listener_item(mlxsw_core, el, priv);
1290         if (el_item)
1291                 return -EEXIST;
1292         el_item = kmalloc(sizeof(*el_item), GFP_KERNEL);
1293         if (!el_item)
1294                 return -ENOMEM;
1295         el_item->el = *el;
1296         el_item->priv = priv;
1297
1298         err = mlxsw_core_rx_listener_register(mlxsw_core, &rxl, el_item);
1299         if (err)
1300                 goto err_rx_listener_register;
1301
1302         /* No reason to save item if we did not manage to register an RX
1303          * listener for it.
1304          */
1305         list_add_rcu(&el_item->list, &mlxsw_core->event_listener_list);
1306
1307         return 0;
1308
1309 err_rx_listener_register:
1310         kfree(el_item);
1311         return err;
1312 }
1313 EXPORT_SYMBOL(mlxsw_core_event_listener_register);
1314
1315 void mlxsw_core_event_listener_unregister(struct mlxsw_core *mlxsw_core,
1316                                           const struct mlxsw_event_listener *el,
1317                                           void *priv)
1318 {
1319         struct mlxsw_event_listener_item *el_item;
1320         const struct mlxsw_rx_listener rxl = {
1321                 .func = mlxsw_core_event_listener_func,
1322                 .local_port = MLXSW_PORT_DONT_CARE,
1323                 .trap_id = el->trap_id,
1324         };
1325
1326         el_item = __find_event_listener_item(mlxsw_core, el, priv);
1327         if (!el_item)
1328                 return;
1329         mlxsw_core_rx_listener_unregister(mlxsw_core, &rxl, el_item);
1330         list_del(&el_item->list);
1331         kfree(el_item);
1332 }
1333 EXPORT_SYMBOL(mlxsw_core_event_listener_unregister);
1334
1335 static int mlxsw_core_listener_register(struct mlxsw_core *mlxsw_core,
1336                                         const struct mlxsw_listener *listener,
1337                                         void *priv)
1338 {
1339         if (listener->is_event)
1340                 return mlxsw_core_event_listener_register(mlxsw_core,
1341                                                 &listener->u.event_listener,
1342                                                 priv);
1343         else
1344                 return mlxsw_core_rx_listener_register(mlxsw_core,
1345                                                 &listener->u.rx_listener,
1346                                                 priv);
1347 }
1348
1349 static void mlxsw_core_listener_unregister(struct mlxsw_core *mlxsw_core,
1350                                       const struct mlxsw_listener *listener,
1351                                       void *priv)
1352 {
1353         if (listener->is_event)
1354                 mlxsw_core_event_listener_unregister(mlxsw_core,
1355                                                      &listener->u.event_listener,
1356                                                      priv);
1357         else
1358                 mlxsw_core_rx_listener_unregister(mlxsw_core,
1359                                                   &listener->u.rx_listener,
1360                                                   priv);
1361 }
1362
1363 int mlxsw_core_trap_register(struct mlxsw_core *mlxsw_core,
1364                              const struct mlxsw_listener *listener, void *priv)
1365 {
1366         char hpkt_pl[MLXSW_REG_HPKT_LEN];
1367         int err;
1368
1369         err = mlxsw_core_listener_register(mlxsw_core, listener, priv);
1370         if (err)
1371                 return err;
1372
1373         mlxsw_reg_hpkt_pack(hpkt_pl, listener->action, listener->trap_id,
1374                             listener->trap_group, listener->is_ctrl);
1375         err = mlxsw_reg_write(mlxsw_core,  MLXSW_REG(hpkt), hpkt_pl);
1376         if (err)
1377                 goto err_trap_set;
1378
1379         return 0;
1380
1381 err_trap_set:
1382         mlxsw_core_listener_unregister(mlxsw_core, listener, priv);
1383         return err;
1384 }
1385 EXPORT_SYMBOL(mlxsw_core_trap_register);
1386
1387 void mlxsw_core_trap_unregister(struct mlxsw_core *mlxsw_core,
1388                                 const struct mlxsw_listener *listener,
1389                                 void *priv)
1390 {
1391         char hpkt_pl[MLXSW_REG_HPKT_LEN];
1392
1393         if (!listener->is_event) {
1394                 mlxsw_reg_hpkt_pack(hpkt_pl, listener->unreg_action,
1395                                     listener->trap_id, listener->trap_group,
1396                                     listener->is_ctrl);
1397                 mlxsw_reg_write(mlxsw_core, MLXSW_REG(hpkt), hpkt_pl);
1398         }
1399
1400         mlxsw_core_listener_unregister(mlxsw_core, listener, priv);
1401 }
1402 EXPORT_SYMBOL(mlxsw_core_trap_unregister);
1403
1404 static u64 mlxsw_core_tid_get(struct mlxsw_core *mlxsw_core)
1405 {
1406         return atomic64_inc_return(&mlxsw_core->emad.tid);
1407 }
1408
1409 static int mlxsw_core_reg_access_emad(struct mlxsw_core *mlxsw_core,
1410                                       const struct mlxsw_reg_info *reg,
1411                                       char *payload,
1412                                       enum mlxsw_core_reg_access_type type,
1413                                       struct list_head *bulk_list,
1414                                       mlxsw_reg_trans_cb_t *cb,
1415                                       unsigned long cb_priv)
1416 {
1417         u64 tid = mlxsw_core_tid_get(mlxsw_core);
1418         struct mlxsw_reg_trans *trans;
1419         int err;
1420
1421         trans = kzalloc(sizeof(*trans), GFP_KERNEL);
1422         if (!trans)
1423                 return -ENOMEM;
1424
1425         err = mlxsw_emad_reg_access(mlxsw_core, reg, payload, type, trans,
1426                                     bulk_list, cb, cb_priv, tid);
1427         if (err) {
1428                 kfree(trans);
1429                 return err;
1430         }
1431         return 0;
1432 }
1433
1434 int mlxsw_reg_trans_query(struct mlxsw_core *mlxsw_core,
1435                           const struct mlxsw_reg_info *reg, char *payload,
1436                           struct list_head *bulk_list,
1437                           mlxsw_reg_trans_cb_t *cb, unsigned long cb_priv)
1438 {
1439         return mlxsw_core_reg_access_emad(mlxsw_core, reg, payload,
1440                                           MLXSW_CORE_REG_ACCESS_TYPE_QUERY,
1441                                           bulk_list, cb, cb_priv);
1442 }
1443 EXPORT_SYMBOL(mlxsw_reg_trans_query);
1444
1445 int mlxsw_reg_trans_write(struct mlxsw_core *mlxsw_core,
1446                           const struct mlxsw_reg_info *reg, char *payload,
1447                           struct list_head *bulk_list,
1448                           mlxsw_reg_trans_cb_t *cb, unsigned long cb_priv)
1449 {
1450         return mlxsw_core_reg_access_emad(mlxsw_core, reg, payload,
1451                                           MLXSW_CORE_REG_ACCESS_TYPE_WRITE,
1452                                           bulk_list, cb, cb_priv);
1453 }
1454 EXPORT_SYMBOL(mlxsw_reg_trans_write);
1455
1456 static int mlxsw_reg_trans_wait(struct mlxsw_reg_trans *trans)
1457 {
1458         struct mlxsw_core *mlxsw_core = trans->core;
1459         int err;
1460
1461         wait_for_completion(&trans->completion);
1462         cancel_delayed_work_sync(&trans->timeout_dw);
1463         err = trans->err;
1464
1465         if (trans->retries)
1466                 dev_warn(mlxsw_core->bus_info->dev, "EMAD retries (%d/%d) (tid=%llx)\n",
1467                          trans->retries, MLXSW_EMAD_MAX_RETRY, trans->tid);
1468         if (err) {
1469                 dev_err(mlxsw_core->bus_info->dev, "EMAD reg access failed (tid=%llx,reg_id=%x(%s),type=%s,status=%x(%s))\n",
1470                         trans->tid, trans->reg->id,
1471                         mlxsw_reg_id_str(trans->reg->id),
1472                         mlxsw_core_reg_access_type_str(trans->type),
1473                         trans->emad_status,
1474                         mlxsw_emad_op_tlv_status_str(trans->emad_status));
1475                 trace_devlink_hwerr(priv_to_devlink(mlxsw_core),
1476                                     trans->emad_status,
1477                                     mlxsw_emad_op_tlv_status_str(trans->emad_status));
1478         }
1479
1480         list_del(&trans->bulk_list);
1481         kfree_rcu(trans, rcu);
1482         return err;
1483 }
1484
1485 int mlxsw_reg_trans_bulk_wait(struct list_head *bulk_list)
1486 {
1487         struct mlxsw_reg_trans *trans;
1488         struct mlxsw_reg_trans *tmp;
1489         int sum_err = 0;
1490         int err;
1491
1492         list_for_each_entry_safe(trans, tmp, bulk_list, bulk_list) {
1493                 err = mlxsw_reg_trans_wait(trans);
1494                 if (err && sum_err == 0)
1495                         sum_err = err; /* first error to be returned */
1496         }
1497         return sum_err;
1498 }
1499 EXPORT_SYMBOL(mlxsw_reg_trans_bulk_wait);
1500
1501 static int mlxsw_core_reg_access_cmd(struct mlxsw_core *mlxsw_core,
1502                                      const struct mlxsw_reg_info *reg,
1503                                      char *payload,
1504                                      enum mlxsw_core_reg_access_type type)
1505 {
1506         enum mlxsw_emad_op_tlv_status status;
1507         int err, n_retry;
1508         bool reset_ok;
1509         char *in_mbox, *out_mbox, *tmp;
1510
1511         dev_dbg(mlxsw_core->bus_info->dev, "Reg cmd access (reg_id=%x(%s),type=%s)\n",
1512                 reg->id, mlxsw_reg_id_str(reg->id),
1513                 mlxsw_core_reg_access_type_str(type));
1514
1515         in_mbox = mlxsw_cmd_mbox_alloc();
1516         if (!in_mbox)
1517                 return -ENOMEM;
1518
1519         out_mbox = mlxsw_cmd_mbox_alloc();
1520         if (!out_mbox) {
1521                 err = -ENOMEM;
1522                 goto free_in_mbox;
1523         }
1524
1525         mlxsw_emad_pack_op_tlv(in_mbox, reg, type,
1526                                mlxsw_core_tid_get(mlxsw_core));
1527         tmp = in_mbox + MLXSW_EMAD_OP_TLV_LEN * sizeof(u32);
1528         mlxsw_emad_pack_reg_tlv(tmp, reg, payload);
1529
1530         /* There is a special treatment needed for MRSR (reset) register.
1531          * The command interface will return error after the command
1532          * is executed, so tell the lower layer to expect it
1533          * and cope accordingly.
1534          */
1535         reset_ok = reg->id == MLXSW_REG_MRSR_ID;
1536
1537         n_retry = 0;
1538 retry:
1539         err = mlxsw_cmd_access_reg(mlxsw_core, reset_ok, in_mbox, out_mbox);
1540         if (!err) {
1541                 err = mlxsw_emad_process_status(out_mbox, &status);
1542                 if (err) {
1543                         if (err == -EAGAIN && n_retry++ < MLXSW_EMAD_MAX_RETRY)
1544                                 goto retry;
1545                         dev_err(mlxsw_core->bus_info->dev, "Reg cmd access status failed (status=%x(%s))\n",
1546                                 status, mlxsw_emad_op_tlv_status_str(status));
1547                 }
1548         }
1549
1550         if (!err)
1551                 memcpy(payload, mlxsw_emad_reg_payload(out_mbox),
1552                        reg->len);
1553
1554         mlxsw_cmd_mbox_free(out_mbox);
1555 free_in_mbox:
1556         mlxsw_cmd_mbox_free(in_mbox);
1557         if (err)
1558                 dev_err(mlxsw_core->bus_info->dev, "Reg cmd access failed (reg_id=%x(%s),type=%s)\n",
1559                         reg->id, mlxsw_reg_id_str(reg->id),
1560                         mlxsw_core_reg_access_type_str(type));
1561         return err;
1562 }
1563
1564 static void mlxsw_core_reg_access_cb(struct mlxsw_core *mlxsw_core,
1565                                      char *payload, size_t payload_len,
1566                                      unsigned long cb_priv)
1567 {
1568         char *orig_payload = (char *) cb_priv;
1569
1570         memcpy(orig_payload, payload, payload_len);
1571 }
1572
1573 static int mlxsw_core_reg_access(struct mlxsw_core *mlxsw_core,
1574                                  const struct mlxsw_reg_info *reg,
1575                                  char *payload,
1576                                  enum mlxsw_core_reg_access_type type)
1577 {
1578         LIST_HEAD(bulk_list);
1579         int err;
1580
1581         /* During initialization EMAD interface is not available to us,
1582          * so we default to command interface. We switch to EMAD interface
1583          * after setting the appropriate traps.
1584          */
1585         if (!mlxsw_core->emad.use_emad)
1586                 return mlxsw_core_reg_access_cmd(mlxsw_core, reg,
1587                                                  payload, type);
1588
1589         err = mlxsw_core_reg_access_emad(mlxsw_core, reg,
1590                                          payload, type, &bulk_list,
1591                                          mlxsw_core_reg_access_cb,
1592                                          (unsigned long) payload);
1593         if (err)
1594                 return err;
1595         return mlxsw_reg_trans_bulk_wait(&bulk_list);
1596 }
1597
1598 int mlxsw_reg_query(struct mlxsw_core *mlxsw_core,
1599                     const struct mlxsw_reg_info *reg, char *payload)
1600 {
1601         return mlxsw_core_reg_access(mlxsw_core, reg, payload,
1602                                      MLXSW_CORE_REG_ACCESS_TYPE_QUERY);
1603 }
1604 EXPORT_SYMBOL(mlxsw_reg_query);
1605
1606 int mlxsw_reg_write(struct mlxsw_core *mlxsw_core,
1607                     const struct mlxsw_reg_info *reg, char *payload)
1608 {
1609         return mlxsw_core_reg_access(mlxsw_core, reg, payload,
1610                                      MLXSW_CORE_REG_ACCESS_TYPE_WRITE);
1611 }
1612 EXPORT_SYMBOL(mlxsw_reg_write);
1613
1614 void mlxsw_core_skb_receive(struct mlxsw_core *mlxsw_core, struct sk_buff *skb,
1615                             struct mlxsw_rx_info *rx_info)
1616 {
1617         struct mlxsw_rx_listener_item *rxl_item;
1618         const struct mlxsw_rx_listener *rxl;
1619         u8 local_port;
1620         bool found = false;
1621
1622         if (rx_info->is_lag) {
1623                 dev_dbg_ratelimited(mlxsw_core->bus_info->dev, "%s: lag_id = %d, lag_port_index = 0x%x\n",
1624                                     __func__, rx_info->u.lag_id,
1625                                     rx_info->trap_id);
1626                 /* Upper layer does not care if the skb came from LAG or not,
1627                  * so just get the local_port for the lag port and push it up.
1628                  */
1629                 local_port = mlxsw_core_lag_mapping_get(mlxsw_core,
1630                                                         rx_info->u.lag_id,
1631                                                         rx_info->lag_port_index);
1632         } else {
1633                 local_port = rx_info->u.sys_port;
1634         }
1635
1636         dev_dbg_ratelimited(mlxsw_core->bus_info->dev, "%s: local_port = %d, trap_id = 0x%x\n",
1637                             __func__, local_port, rx_info->trap_id);
1638
1639         if ((rx_info->trap_id >= MLXSW_TRAP_ID_MAX) ||
1640             (local_port >= mlxsw_core->max_ports))
1641                 goto drop;
1642
1643         rcu_read_lock();
1644         list_for_each_entry_rcu(rxl_item, &mlxsw_core->rx_listener_list, list) {
1645                 rxl = &rxl_item->rxl;
1646                 if ((rxl->local_port == MLXSW_PORT_DONT_CARE ||
1647                      rxl->local_port == local_port) &&
1648                     rxl->trap_id == rx_info->trap_id) {
1649                         found = true;
1650                         break;
1651                 }
1652         }
1653         rcu_read_unlock();
1654         if (!found)
1655                 goto drop;
1656
1657         rxl->func(skb, local_port, rxl_item->priv);
1658         return;
1659
1660 drop:
1661         dev_kfree_skb(skb);
1662 }
1663 EXPORT_SYMBOL(mlxsw_core_skb_receive);
1664
1665 static int mlxsw_core_lag_mapping_index(struct mlxsw_core *mlxsw_core,
1666                                         u16 lag_id, u8 port_index)
1667 {
1668         return MLXSW_CORE_RES_GET(mlxsw_core, MAX_LAG_MEMBERS) * lag_id +
1669                port_index;
1670 }
1671
1672 void mlxsw_core_lag_mapping_set(struct mlxsw_core *mlxsw_core,
1673                                 u16 lag_id, u8 port_index, u8 local_port)
1674 {
1675         int index = mlxsw_core_lag_mapping_index(mlxsw_core,
1676                                                  lag_id, port_index);
1677
1678         mlxsw_core->lag.mapping[index] = local_port;
1679 }
1680 EXPORT_SYMBOL(mlxsw_core_lag_mapping_set);
1681
1682 u8 mlxsw_core_lag_mapping_get(struct mlxsw_core *mlxsw_core,
1683                               u16 lag_id, u8 port_index)
1684 {
1685         int index = mlxsw_core_lag_mapping_index(mlxsw_core,
1686                                                  lag_id, port_index);
1687
1688         return mlxsw_core->lag.mapping[index];
1689 }
1690 EXPORT_SYMBOL(mlxsw_core_lag_mapping_get);
1691
1692 void mlxsw_core_lag_mapping_clear(struct mlxsw_core *mlxsw_core,
1693                                   u16 lag_id, u8 local_port)
1694 {
1695         int i;
1696
1697         for (i = 0; i < MLXSW_CORE_RES_GET(mlxsw_core, MAX_LAG_MEMBERS); i++) {
1698                 int index = mlxsw_core_lag_mapping_index(mlxsw_core,
1699                                                          lag_id, i);
1700
1701                 if (mlxsw_core->lag.mapping[index] == local_port)
1702                         mlxsw_core->lag.mapping[index] = 0;
1703         }
1704 }
1705 EXPORT_SYMBOL(mlxsw_core_lag_mapping_clear);
1706
1707 bool mlxsw_core_res_valid(struct mlxsw_core *mlxsw_core,
1708                           enum mlxsw_res_id res_id)
1709 {
1710         return mlxsw_res_valid(&mlxsw_core->res, res_id);
1711 }
1712 EXPORT_SYMBOL(mlxsw_core_res_valid);
1713
1714 u64 mlxsw_core_res_get(struct mlxsw_core *mlxsw_core,
1715                        enum mlxsw_res_id res_id)
1716 {
1717         return mlxsw_res_get(&mlxsw_core->res, res_id);
1718 }
1719 EXPORT_SYMBOL(mlxsw_core_res_get);
1720
1721 int mlxsw_core_port_init(struct mlxsw_core *mlxsw_core, u8 local_port)
1722 {
1723         struct devlink *devlink = priv_to_devlink(mlxsw_core);
1724         struct mlxsw_core_port *mlxsw_core_port =
1725                                         &mlxsw_core->ports[local_port];
1726         struct devlink_port *devlink_port = &mlxsw_core_port->devlink_port;
1727         int err;
1728
1729         mlxsw_core_port->local_port = local_port;
1730         err = devlink_port_register(devlink, devlink_port, local_port);
1731         if (err)
1732                 memset(mlxsw_core_port, 0, sizeof(*mlxsw_core_port));
1733         return err;
1734 }
1735 EXPORT_SYMBOL(mlxsw_core_port_init);
1736
1737 void mlxsw_core_port_fini(struct mlxsw_core *mlxsw_core, u8 local_port)
1738 {
1739         struct mlxsw_core_port *mlxsw_core_port =
1740                                         &mlxsw_core->ports[local_port];
1741         struct devlink_port *devlink_port = &mlxsw_core_port->devlink_port;
1742
1743         devlink_port_unregister(devlink_port);
1744         memset(mlxsw_core_port, 0, sizeof(*mlxsw_core_port));
1745 }
1746 EXPORT_SYMBOL(mlxsw_core_port_fini);
1747
1748 void mlxsw_core_port_eth_set(struct mlxsw_core *mlxsw_core, u8 local_port,
1749                              void *port_driver_priv, struct net_device *dev,
1750                              u32 port_number, bool split,
1751                              u32 split_port_subnumber)
1752 {
1753         struct mlxsw_core_port *mlxsw_core_port =
1754                                         &mlxsw_core->ports[local_port];
1755         struct devlink_port *devlink_port = &mlxsw_core_port->devlink_port;
1756
1757         mlxsw_core_port->port_driver_priv = port_driver_priv;
1758         devlink_port_attrs_set(devlink_port, DEVLINK_PORT_FLAVOUR_PHYSICAL,
1759                                port_number, split, split_port_subnumber);
1760         devlink_port_type_eth_set(devlink_port, dev);
1761 }
1762 EXPORT_SYMBOL(mlxsw_core_port_eth_set);
1763
1764 void mlxsw_core_port_ib_set(struct mlxsw_core *mlxsw_core, u8 local_port,
1765                             void *port_driver_priv)
1766 {
1767         struct mlxsw_core_port *mlxsw_core_port =
1768                                         &mlxsw_core->ports[local_port];
1769         struct devlink_port *devlink_port = &mlxsw_core_port->devlink_port;
1770
1771         mlxsw_core_port->port_driver_priv = port_driver_priv;
1772         devlink_port_type_ib_set(devlink_port, NULL);
1773 }
1774 EXPORT_SYMBOL(mlxsw_core_port_ib_set);
1775
1776 void mlxsw_core_port_clear(struct mlxsw_core *mlxsw_core, u8 local_port,
1777                            void *port_driver_priv)
1778 {
1779         struct mlxsw_core_port *mlxsw_core_port =
1780                                         &mlxsw_core->ports[local_port];
1781         struct devlink_port *devlink_port = &mlxsw_core_port->devlink_port;
1782
1783         mlxsw_core_port->port_driver_priv = port_driver_priv;
1784         devlink_port_type_clear(devlink_port);
1785 }
1786 EXPORT_SYMBOL(mlxsw_core_port_clear);
1787
1788 enum devlink_port_type mlxsw_core_port_type_get(struct mlxsw_core *mlxsw_core,
1789                                                 u8 local_port)
1790 {
1791         struct mlxsw_core_port *mlxsw_core_port =
1792                                         &mlxsw_core->ports[local_port];
1793         struct devlink_port *devlink_port = &mlxsw_core_port->devlink_port;
1794
1795         return devlink_port->type;
1796 }
1797 EXPORT_SYMBOL(mlxsw_core_port_type_get);
1798
1799 int mlxsw_core_port_get_phys_port_name(struct mlxsw_core *mlxsw_core,
1800                                        u8 local_port, char *name, size_t len)
1801 {
1802         struct mlxsw_core_port *mlxsw_core_port =
1803                                         &mlxsw_core->ports[local_port];
1804         struct devlink_port *devlink_port = &mlxsw_core_port->devlink_port;
1805
1806         return devlink_port_get_phys_port_name(devlink_port, name, len);
1807 }
1808 EXPORT_SYMBOL(mlxsw_core_port_get_phys_port_name);
1809
1810 static void mlxsw_core_buf_dump_dbg(struct mlxsw_core *mlxsw_core,
1811                                     const char *buf, size_t size)
1812 {
1813         __be32 *m = (__be32 *) buf;
1814         int i;
1815         int count = size / sizeof(__be32);
1816
1817         for (i = count - 1; i >= 0; i--)
1818                 if (m[i])
1819                         break;
1820         i++;
1821         count = i ? i : 1;
1822         for (i = 0; i < count; i += 4)
1823                 dev_dbg(mlxsw_core->bus_info->dev, "%04x - %08x %08x %08x %08x\n",
1824                         i * 4, be32_to_cpu(m[i]), be32_to_cpu(m[i + 1]),
1825                         be32_to_cpu(m[i + 2]), be32_to_cpu(m[i + 3]));
1826 }
1827
1828 int mlxsw_cmd_exec(struct mlxsw_core *mlxsw_core, u16 opcode, u8 opcode_mod,
1829                    u32 in_mod, bool out_mbox_direct, bool reset_ok,
1830                    char *in_mbox, size_t in_mbox_size,
1831                    char *out_mbox, size_t out_mbox_size)
1832 {
1833         u8 status;
1834         int err;
1835
1836         BUG_ON(in_mbox_size % sizeof(u32) || out_mbox_size % sizeof(u32));
1837         if (!mlxsw_core->bus->cmd_exec)
1838                 return -EOPNOTSUPP;
1839
1840         dev_dbg(mlxsw_core->bus_info->dev, "Cmd exec (opcode=%x(%s),opcode_mod=%x,in_mod=%x)\n",
1841                 opcode, mlxsw_cmd_opcode_str(opcode), opcode_mod, in_mod);
1842         if (in_mbox) {
1843                 dev_dbg(mlxsw_core->bus_info->dev, "Input mailbox:\n");
1844                 mlxsw_core_buf_dump_dbg(mlxsw_core, in_mbox, in_mbox_size);
1845         }
1846
1847         err = mlxsw_core->bus->cmd_exec(mlxsw_core->bus_priv, opcode,
1848                                         opcode_mod, in_mod, out_mbox_direct,
1849                                         in_mbox, in_mbox_size,
1850                                         out_mbox, out_mbox_size, &status);
1851
1852         if (!err && out_mbox) {
1853                 dev_dbg(mlxsw_core->bus_info->dev, "Output mailbox:\n");
1854                 mlxsw_core_buf_dump_dbg(mlxsw_core, out_mbox, out_mbox_size);
1855         }
1856
1857         if (reset_ok && err == -EIO &&
1858             status == MLXSW_CMD_STATUS_RUNNING_RESET) {
1859                 err = 0;
1860         } else if (err == -EIO && status != MLXSW_CMD_STATUS_OK) {
1861                 dev_err(mlxsw_core->bus_info->dev, "Cmd exec failed (opcode=%x(%s),opcode_mod=%x,in_mod=%x,status=%x(%s))\n",
1862                         opcode, mlxsw_cmd_opcode_str(opcode), opcode_mod,
1863                         in_mod, status, mlxsw_cmd_status_str(status));
1864         } else if (err == -ETIMEDOUT) {
1865                 dev_err(mlxsw_core->bus_info->dev, "Cmd exec timed-out (opcode=%x(%s),opcode_mod=%x,in_mod=%x)\n",
1866                         opcode, mlxsw_cmd_opcode_str(opcode), opcode_mod,
1867                         in_mod);
1868         }
1869
1870         return err;
1871 }
1872 EXPORT_SYMBOL(mlxsw_cmd_exec);
1873
1874 int mlxsw_core_schedule_dw(struct delayed_work *dwork, unsigned long delay)
1875 {
1876         return queue_delayed_work(mlxsw_wq, dwork, delay);
1877 }
1878 EXPORT_SYMBOL(mlxsw_core_schedule_dw);
1879
1880 bool mlxsw_core_schedule_work(struct work_struct *work)
1881 {
1882         return queue_work(mlxsw_owq, work);
1883 }
1884 EXPORT_SYMBOL(mlxsw_core_schedule_work);
1885
1886 void mlxsw_core_flush_owq(void)
1887 {
1888         flush_workqueue(mlxsw_owq);
1889 }
1890 EXPORT_SYMBOL(mlxsw_core_flush_owq);
1891
1892 int mlxsw_core_kvd_sizes_get(struct mlxsw_core *mlxsw_core,
1893                              const struct mlxsw_config_profile *profile,
1894                              u64 *p_single_size, u64 *p_double_size,
1895                              u64 *p_linear_size)
1896 {
1897         struct mlxsw_driver *driver = mlxsw_core->driver;
1898
1899         if (!driver->kvd_sizes_get)
1900                 return -EINVAL;
1901
1902         return driver->kvd_sizes_get(mlxsw_core, profile,
1903                                      p_single_size, p_double_size,
1904                                      p_linear_size);
1905 }
1906 EXPORT_SYMBOL(mlxsw_core_kvd_sizes_get);
1907
1908 void mlxsw_core_fw_flash_start(struct mlxsw_core *mlxsw_core)
1909 {
1910         mlxsw_core->fw_flash_in_progress = true;
1911 }
1912 EXPORT_SYMBOL(mlxsw_core_fw_flash_start);
1913
1914 void mlxsw_core_fw_flash_end(struct mlxsw_core *mlxsw_core)
1915 {
1916         mlxsw_core->fw_flash_in_progress = false;
1917 }
1918 EXPORT_SYMBOL(mlxsw_core_fw_flash_end);
1919
1920 static int __init mlxsw_core_module_init(void)
1921 {
1922         int err;
1923
1924         mlxsw_wq = alloc_workqueue(mlxsw_core_driver_name, WQ_MEM_RECLAIM, 0);
1925         if (!mlxsw_wq)
1926                 return -ENOMEM;
1927         mlxsw_owq = alloc_ordered_workqueue("%s_ordered", WQ_MEM_RECLAIM,
1928                                             mlxsw_core_driver_name);
1929         if (!mlxsw_owq) {
1930                 err = -ENOMEM;
1931                 goto err_alloc_ordered_workqueue;
1932         }
1933         return 0;
1934
1935 err_alloc_ordered_workqueue:
1936         destroy_workqueue(mlxsw_wq);
1937         return err;
1938 }
1939
1940 static void __exit mlxsw_core_module_exit(void)
1941 {
1942         destroy_workqueue(mlxsw_owq);
1943         destroy_workqueue(mlxsw_wq);
1944 }
1945
1946 module_init(mlxsw_core_module_init);
1947 module_exit(mlxsw_core_module_exit);
1948
1949 MODULE_LICENSE("Dual BSD/GPL");
1950 MODULE_AUTHOR("Jiri Pirko <jiri@mellanox.com>");
1951 MODULE_DESCRIPTION("Mellanox switch device core driver");