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 <linux/firmware.h>
  24 #include <asm/byteorder.h>
  25 #include <net/devlink.h>
  26 #include <trace/events/devlink.h>
  27
  28 #include "core.h"
  29 #include "core_env.h"
  30 #include "item.h"
  31 #include "cmd.h"
  32 #include "port.h"
  33 #include "trap.h"
  34 #include "emad.h"
  35 #include "reg.h"
  36 #include "resources.h"
  37 #include "../mlxfw/mlxfw.h"
  38
  39 static LIST_HEAD(mlxsw_core_driver_list);
  40 static DEFINE_SPINLOCK(mlxsw_core_driver_list_lock);
  41
  42 static const char mlxsw_core_driver_name[] = "mlxsw_core";
  43
  44 static struct workqueue_struct *mlxsw_wq;
  45 static struct workqueue_struct *mlxsw_owq;
  46
  47 struct mlxsw_core_port {
  48         struct devlink_port devlink_port;
  49         void *port_driver_priv;
  50         u8 local_port;
  51 };
  52
  53 void *mlxsw_core_port_driver_priv(struct mlxsw_core_port *mlxsw_core_port)
  54 {
  55         return mlxsw_core_port->port_driver_priv;
  56 }
  57 EXPORT_SYMBOL(mlxsw_core_port_driver_priv);
  58
  59 static bool mlxsw_core_port_check(struct mlxsw_core_port *mlxsw_core_port)
  60 {
  61         return mlxsw_core_port->port_driver_priv != NULL;
  62 }
  63
  64 struct mlxsw_core {
  65         struct mlxsw_driver *driver;
  66         const struct mlxsw_bus *bus;
  67         void *bus_priv;
  68         const struct mlxsw_bus_info *bus_info;
  69         struct workqueue_struct *emad_wq;
  70         struct list_head rx_listener_list;
  71         struct list_head event_listener_list;
  72         struct {
  73                 atomic64_t tid;
  74                 struct list_head trans_list;
  75                 spinlock_t trans_list_lock; /* protects trans_list writes */
  76                 bool use_emad;
  77                 bool enable_string_tlv;
  78         } emad;
  79         struct {
  80                 u8 *mapping; /* lag_id+port_index to local_port mapping */
  81         } lag;
  82         struct mlxsw_res res;
  83         struct mlxsw_hwmon *hwmon;
  84         struct mlxsw_thermal *thermal;
  85         struct mlxsw_core_port *ports;
  86         unsigned int max_ports;
  87         bool fw_flash_in_progress;
  88         struct {
  89                 struct devlink_health_reporter *fw_fatal;
  90         } health;
  91         struct mlxsw_env *env;
  92         bool is_initialized; /* Denotes if core was already initialized. */
  93         unsigned long driver_priv[];
  94         /* driver_priv has to be always the last item */
  95 };
  96
  97 #define MLXSW_PORT_MAX_PORTS_DEFAULT    0x40
  98
  99 static int mlxsw_ports_init(struct mlxsw_core *mlxsw_core)
 100 {
 101         /* Switch ports are numbered from 1 to queried value */
 102         if (MLXSW_CORE_RES_VALID(mlxsw_core, MAX_SYSTEM_PORT))
 103                 mlxsw_core->max_ports = MLXSW_CORE_RES_GET(mlxsw_core,
 104                                                            MAX_SYSTEM_PORT) + 1;
 105         else
 106                 mlxsw_core->max_ports = MLXSW_PORT_MAX_PORTS_DEFAULT + 1;
 107
 108         mlxsw_core->ports = kcalloc(mlxsw_core->max_ports,
 109                                     sizeof(struct mlxsw_core_port), GFP_KERNEL);
 110         if (!mlxsw_core->ports)
 111                 return -ENOMEM;
 112
 113         return 0;
 114 }
 115
 116 static void mlxsw_ports_fini(struct mlxsw_core *mlxsw_core)
 117 {
 118         kfree(mlxsw_core->ports);
 119 }
 120
 121 unsigned int mlxsw_core_max_ports(const struct mlxsw_core *mlxsw_core)
 122 {
 123         return mlxsw_core->max_ports;
 124 }
 125 EXPORT_SYMBOL(mlxsw_core_max_ports);
 126
 127 void *mlxsw_core_driver_priv(struct mlxsw_core *mlxsw_core)
 128 {
 129         return mlxsw_core->driver_priv;
 130 }
 131 EXPORT_SYMBOL(mlxsw_core_driver_priv);
 132
 133 bool mlxsw_core_res_query_enabled(const struct mlxsw_core *mlxsw_core)
 134 {
 135         return mlxsw_core->driver->res_query_enabled;
 136 }
 137 EXPORT_SYMBOL(mlxsw_core_res_query_enabled);
 138
 139 bool mlxsw_core_temp_warn_enabled(const struct mlxsw_core *mlxsw_core)
 140 {
 141         return mlxsw_core->driver->temp_warn_enabled;
 142 }
 143
 144 bool
 145 mlxsw_core_fw_rev_minor_subminor_validate(const struct mlxsw_fw_rev *rev,
 146                                           const struct mlxsw_fw_rev *req_rev)
 147 {
 148         return rev->minor > req_rev->minor ||
 149                (rev->minor == req_rev->minor &&
 150                 rev->subminor >= req_rev->subminor);
 151 }
 152 EXPORT_SYMBOL(mlxsw_core_fw_rev_minor_subminor_validate);
 153
 154 struct mlxsw_rx_listener_item {
 155         struct list_head list;
 156         struct mlxsw_rx_listener rxl;
 157         void *priv;
 158         bool enabled;
 159 };
 160
 161 struct mlxsw_event_listener_item {
 162         struct list_head list;
 163         struct mlxsw_core *mlxsw_core;
 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_string_tlv_type
 269  * Type of the TLV.
 270  * Must be set to 0x2 (string TLV).
 271  */
 272 MLXSW_ITEM32(emad, string_tlv, type, 0x00, 27, 5);
 273
 274 /* emad_string_tlv_len
 275  * Length of the string TLV in u32.
 276  */
 277 MLXSW_ITEM32(emad, string_tlv, len, 0x00, 16, 11);
 278
 279 #define MLXSW_EMAD_STRING_TLV_STRING_LEN 128
 280
 281 /* emad_string_tlv_string
 282  * String provided by the device's firmware in case of erroneous register access
 283  */
 284 MLXSW_ITEM_BUF(emad, string_tlv, string, 0x04,
 285                MLXSW_EMAD_STRING_TLV_STRING_LEN);
 286
 287 /* emad_reg_tlv_type
 288  * Type of the TLV.
 289  * Must be set to 0x3 (register TLV).
 290  */
 291 MLXSW_ITEM32(emad, reg_tlv, type, 0x00, 27, 5);
 292
 293 /* emad_reg_tlv_len
 294  * Length of the operation TLV in u32.
 295  */
 296 MLXSW_ITEM32(emad, reg_tlv, len, 0x00, 16, 11);
 297
 298 /* emad_end_tlv_type
 299  * Type of the TLV.
 300  * Must be set to 0x0 (end TLV).
 301  */
 302 MLXSW_ITEM32(emad, end_tlv, type, 0x00, 27, 5);
 303
 304 /* emad_end_tlv_len
 305  * Length of the end TLV in u32.
 306  * Must be set to 1.
 307  */
 308 MLXSW_ITEM32(emad, end_tlv, len, 0x00, 16, 11);
 309
 310 enum mlxsw_core_reg_access_type {
 311         MLXSW_CORE_REG_ACCESS_TYPE_QUERY,
 312         MLXSW_CORE_REG_ACCESS_TYPE_WRITE,
 313 };
 314
 315 static inline const char *
 316 mlxsw_core_reg_access_type_str(enum mlxsw_core_reg_access_type type)
 317 {
 318         switch (type) {
 319         case MLXSW_CORE_REG_ACCESS_TYPE_QUERY:
 320                 return "query";
 321         case MLXSW_CORE_REG_ACCESS_TYPE_WRITE:
 322                 return "write";
 323         }
 324         BUG();
 325 }
 326
 327 static void mlxsw_emad_pack_end_tlv(char *end_tlv)
 328 {
 329         mlxsw_emad_end_tlv_type_set(end_tlv, MLXSW_EMAD_TLV_TYPE_END);
 330         mlxsw_emad_end_tlv_len_set(end_tlv, MLXSW_EMAD_END_TLV_LEN);
 331 }
 332
 333 static void mlxsw_emad_pack_reg_tlv(char *reg_tlv,
 334                                     const struct mlxsw_reg_info *reg,
 335                                     char *payload)
 336 {
 337         mlxsw_emad_reg_tlv_type_set(reg_tlv, MLXSW_EMAD_TLV_TYPE_REG);
 338         mlxsw_emad_reg_tlv_len_set(reg_tlv, reg->len / sizeof(u32) + 1);
 339         memcpy(reg_tlv + sizeof(u32), payload, reg->len);
 340 }
 341
 342 static void mlxsw_emad_pack_string_tlv(char *string_tlv)
 343 {
 344         mlxsw_emad_string_tlv_type_set(string_tlv, MLXSW_EMAD_TLV_TYPE_STRING);
 345         mlxsw_emad_string_tlv_len_set(string_tlv, MLXSW_EMAD_STRING_TLV_LEN);
 346 }
 347
 348 static void mlxsw_emad_pack_op_tlv(char *op_tlv,
 349                                    const struct mlxsw_reg_info *reg,
 350                                    enum mlxsw_core_reg_access_type type,
 351                                    u64 tid)
 352 {
 353         mlxsw_emad_op_tlv_type_set(op_tlv, MLXSW_EMAD_TLV_TYPE_OP);
 354         mlxsw_emad_op_tlv_len_set(op_tlv, MLXSW_EMAD_OP_TLV_LEN);
 355         mlxsw_emad_op_tlv_dr_set(op_tlv, 0);
 356         mlxsw_emad_op_tlv_status_set(op_tlv, 0);
 357         mlxsw_emad_op_tlv_register_id_set(op_tlv, reg->id);
 358         mlxsw_emad_op_tlv_r_set(op_tlv, MLXSW_EMAD_OP_TLV_REQUEST);
 359         if (type == MLXSW_CORE_REG_ACCESS_TYPE_QUERY)
 360                 mlxsw_emad_op_tlv_method_set(op_tlv,
 361                                              MLXSW_EMAD_OP_TLV_METHOD_QUERY);
 362         else
 363                 mlxsw_emad_op_tlv_method_set(op_tlv,
 364                                              MLXSW_EMAD_OP_TLV_METHOD_WRITE);
 365         mlxsw_emad_op_tlv_class_set(op_tlv,
 366                                     MLXSW_EMAD_OP_TLV_CLASS_REG_ACCESS);
 367         mlxsw_emad_op_tlv_tid_set(op_tlv, tid);
 368 }
 369
 370 static int mlxsw_emad_construct_eth_hdr(struct sk_buff *skb)
 371 {
 372         char *eth_hdr = skb_push(skb, MLXSW_EMAD_ETH_HDR_LEN);
 373
 374         mlxsw_emad_eth_hdr_dmac_memcpy_to(eth_hdr, MLXSW_EMAD_EH_DMAC);
 375         mlxsw_emad_eth_hdr_smac_memcpy_to(eth_hdr, MLXSW_EMAD_EH_SMAC);
 376         mlxsw_emad_eth_hdr_ethertype_set(eth_hdr, MLXSW_EMAD_EH_ETHERTYPE);
 377         mlxsw_emad_eth_hdr_mlx_proto_set(eth_hdr, MLXSW_EMAD_EH_MLX_PROTO);
 378         mlxsw_emad_eth_hdr_ver_set(eth_hdr, MLXSW_EMAD_EH_PROTO_VERSION);
 379
 380         skb_reset_mac_header(skb);
 381
 382         return 0;
 383 }
 384
 385 static void mlxsw_emad_construct(struct sk_buff *skb,
 386                                  const struct mlxsw_reg_info *reg,
 387                                  char *payload,
 388                                  enum mlxsw_core_reg_access_type type,
 389                                  u64 tid, bool enable_string_tlv)
 390 {
 391         char *buf;
 392
 393         buf = skb_push(skb, MLXSW_EMAD_END_TLV_LEN * sizeof(u32));
 394         mlxsw_emad_pack_end_tlv(buf);
 395
 396         buf = skb_push(skb, reg->len + sizeof(u32));
 397         mlxsw_emad_pack_reg_tlv(buf, reg, payload);
 398
 399         if (enable_string_tlv) {
 400                 buf = skb_push(skb, MLXSW_EMAD_STRING_TLV_LEN * sizeof(u32));
 401                 mlxsw_emad_pack_string_tlv(buf);
 402         }
 403
 404         buf = skb_push(skb, MLXSW_EMAD_OP_TLV_LEN * sizeof(u32));
 405         mlxsw_emad_pack_op_tlv(buf, reg, type, tid);
 406
 407         mlxsw_emad_construct_eth_hdr(skb);
 408 }
 409
 410 struct mlxsw_emad_tlv_offsets {
 411         u16 op_tlv;
 412         u16 string_tlv;
 413         u16 reg_tlv;
 414 };
 415
 416 static bool mlxsw_emad_tlv_is_string_tlv(const char *tlv)
 417 {
 418         u8 tlv_type = mlxsw_emad_string_tlv_type_get(tlv);
 419
 420         return tlv_type == MLXSW_EMAD_TLV_TYPE_STRING;
 421 }
 422
 423 static void mlxsw_emad_tlv_parse(struct sk_buff *skb)
 424 {
 425         struct mlxsw_emad_tlv_offsets *offsets =
 426                 (struct mlxsw_emad_tlv_offsets *) skb->cb;
 427
 428         offsets->op_tlv = MLXSW_EMAD_ETH_HDR_LEN;
 429         offsets->string_tlv = 0;
 430         offsets->reg_tlv = MLXSW_EMAD_ETH_HDR_LEN +
 431                            MLXSW_EMAD_OP_TLV_LEN * sizeof(u32);
 432
 433         /* If string TLV is present, it must come after the operation TLV. */
 434         if (mlxsw_emad_tlv_is_string_tlv(skb->data + offsets->reg_tlv)) {
 435                 offsets->string_tlv = offsets->reg_tlv;
 436                 offsets->reg_tlv += MLXSW_EMAD_STRING_TLV_LEN * sizeof(u32);
 437         }
 438 }
 439
 440 static char *mlxsw_emad_op_tlv(const struct sk_buff *skb)
 441 {
 442         struct mlxsw_emad_tlv_offsets *offsets =
 443                 (struct mlxsw_emad_tlv_offsets *) skb->cb;
 444
 445         return ((char *) (skb->data + offsets->op_tlv));
 446 }
 447
 448 static char *mlxsw_emad_string_tlv(const struct sk_buff *skb)
 449 {
 450         struct mlxsw_emad_tlv_offsets *offsets =
 451                 (struct mlxsw_emad_tlv_offsets *) skb->cb;
 452
 453         if (!offsets->string_tlv)
 454                 return NULL;
 455
 456         return ((char *) (skb->data + offsets->string_tlv));
 457 }
 458
 459 static char *mlxsw_emad_reg_tlv(const struct sk_buff *skb)
 460 {
 461         struct mlxsw_emad_tlv_offsets *offsets =
 462                 (struct mlxsw_emad_tlv_offsets *) skb->cb;
 463
 464         return ((char *) (skb->data + offsets->reg_tlv));
 465 }
 466
 467 static char *mlxsw_emad_reg_payload(const char *reg_tlv)
 468 {
 469         return ((char *) (reg_tlv + sizeof(u32)));
 470 }
 471
 472 static char *mlxsw_emad_reg_payload_cmd(const char *mbox)
 473 {
 474         return ((char *) (mbox + (MLXSW_EMAD_OP_TLV_LEN + 1) * sizeof(u32)));
 475 }
 476
 477 static u64 mlxsw_emad_get_tid(const struct sk_buff *skb)
 478 {
 479         char *op_tlv;
 480
 481         op_tlv = mlxsw_emad_op_tlv(skb);
 482         return mlxsw_emad_op_tlv_tid_get(op_tlv);
 483 }
 484
 485 static bool mlxsw_emad_is_resp(const struct sk_buff *skb)
 486 {
 487         char *op_tlv;
 488
 489         op_tlv = mlxsw_emad_op_tlv(skb);
 490         return (mlxsw_emad_op_tlv_r_get(op_tlv) == MLXSW_EMAD_OP_TLV_RESPONSE);
 491 }
 492
 493 static int mlxsw_emad_process_status(char *op_tlv,
 494                                      enum mlxsw_emad_op_tlv_status *p_status)
 495 {
 496         *p_status = mlxsw_emad_op_tlv_status_get(op_tlv);
 497
 498         switch (*p_status) {
 499         case MLXSW_EMAD_OP_TLV_STATUS_SUCCESS:
 500                 return 0;
 501         case MLXSW_EMAD_OP_TLV_STATUS_BUSY:
 502         case MLXSW_EMAD_OP_TLV_STATUS_MESSAGE_RECEIPT_ACK:
 503                 return -EAGAIN;
 504         case MLXSW_EMAD_OP_TLV_STATUS_VERSION_NOT_SUPPORTED:
 505         case MLXSW_EMAD_OP_TLV_STATUS_UNKNOWN_TLV:
 506         case MLXSW_EMAD_OP_TLV_STATUS_REGISTER_NOT_SUPPORTED:
 507         case MLXSW_EMAD_OP_TLV_STATUS_CLASS_NOT_SUPPORTED:
 508         case MLXSW_EMAD_OP_TLV_STATUS_METHOD_NOT_SUPPORTED:
 509         case MLXSW_EMAD_OP_TLV_STATUS_BAD_PARAMETER:
 510         case MLXSW_EMAD_OP_TLV_STATUS_RESOURCE_NOT_AVAILABLE:
 511         case MLXSW_EMAD_OP_TLV_STATUS_INTERNAL_ERROR:
 512         default:
 513                 return -EIO;
 514         }
 515 }
 516
 517 static int
 518 mlxsw_emad_process_status_skb(struct sk_buff *skb,
 519                               enum mlxsw_emad_op_tlv_status *p_status)
 520 {
 521         return mlxsw_emad_process_status(mlxsw_emad_op_tlv(skb), p_status);
 522 }
 523
 524 struct mlxsw_reg_trans {
 525         struct list_head list;
 526         struct list_head bulk_list;
 527         struct mlxsw_core *core;
 528         struct sk_buff *tx_skb;
 529         struct mlxsw_tx_info tx_info;
 530         struct delayed_work timeout_dw;
 531         unsigned int retries;
 532         u64 tid;
 533         struct completion completion;
 534         atomic_t active;
 535         mlxsw_reg_trans_cb_t *cb;
 536         unsigned long cb_priv;
 537         const struct mlxsw_reg_info *reg;
 538         enum mlxsw_core_reg_access_type type;
 539         int err;
 540         char *emad_err_string;
 541         enum mlxsw_emad_op_tlv_status emad_status;
 542         struct rcu_head rcu;
 543 };
 544
 545 static void mlxsw_emad_process_string_tlv(const struct sk_buff *skb,
 546                                           struct mlxsw_reg_trans *trans)
 547 {
 548         char *string_tlv;
 549         char *string;
 550
 551         string_tlv = mlxsw_emad_string_tlv(skb);
 552         if (!string_tlv)
 553                 return;
 554
 555         trans->emad_err_string = kzalloc(MLXSW_EMAD_STRING_TLV_STRING_LEN,
 556                                          GFP_ATOMIC);
 557         if (!trans->emad_err_string)
 558                 return;
 559
 560         string = mlxsw_emad_string_tlv_string_data(string_tlv);
 561         strlcpy(trans->emad_err_string, string,
 562                 MLXSW_EMAD_STRING_TLV_STRING_LEN);
 563 }
 564
 565 #define MLXSW_EMAD_TIMEOUT_DURING_FW_FLASH_MS   3000
 566 #define MLXSW_EMAD_TIMEOUT_MS                   200
 567
 568 static void mlxsw_emad_trans_timeout_schedule(struct mlxsw_reg_trans *trans)
 569 {
 570         unsigned long timeout = msecs_to_jiffies(MLXSW_EMAD_TIMEOUT_MS);
 571
 572         if (trans->core->fw_flash_in_progress)
 573                 timeout = msecs_to_jiffies(MLXSW_EMAD_TIMEOUT_DURING_FW_FLASH_MS);
 574
 575         queue_delayed_work(trans->core->emad_wq, &trans->timeout_dw,
 576                            timeout << trans->retries);
 577 }
 578
 579 static int mlxsw_emad_transmit(struct mlxsw_core *mlxsw_core,
 580                                struct mlxsw_reg_trans *trans)
 581 {
 582         struct sk_buff *skb;
 583         int err;
 584
 585         skb = skb_copy(trans->tx_skb, GFP_KERNEL);
 586         if (!skb)
 587                 return -ENOMEM;
 588
 589         trace_devlink_hwmsg(priv_to_devlink(mlxsw_core), false, 0,
 590                             skb->data + mlxsw_core->driver->txhdr_len,
 591                             skb->len - mlxsw_core->driver->txhdr_len);
 592
 593         atomic_set(&trans->active, 1);
 594         err = mlxsw_core_skb_transmit(mlxsw_core, skb, &trans->tx_info);
 595         if (err) {
 596                 dev_kfree_skb(skb);
 597                 return err;
 598         }
 599         mlxsw_emad_trans_timeout_schedule(trans);
 600         return 0;
 601 }
 602
 603 static void mlxsw_emad_trans_finish(struct mlxsw_reg_trans *trans, int err)
 604 {
 605         struct mlxsw_core *mlxsw_core = trans->core;
 606
 607         dev_kfree_skb(trans->tx_skb);
 608         spin_lock_bh(&mlxsw_core->emad.trans_list_lock);
 609         list_del_rcu(&trans->list);
 610         spin_unlock_bh(&mlxsw_core->emad.trans_list_lock);
 611         trans->err = err;
 612         complete(&trans->completion);
 613 }
 614
 615 static void mlxsw_emad_transmit_retry(struct mlxsw_core *mlxsw_core,
 616                                       struct mlxsw_reg_trans *trans)
 617 {
 618         int err;
 619
 620         if (trans->retries < MLXSW_EMAD_MAX_RETRY) {
 621                 trans->retries++;
 622                 err = mlxsw_emad_transmit(trans->core, trans);
 623                 if (err == 0)
 624                         return;
 625
 626                 if (!atomic_dec_and_test(&trans->active))
 627                         return;
 628         } else {
 629                 err = -EIO;
 630         }
 631         mlxsw_emad_trans_finish(trans, err);
 632 }
 633
 634 static void mlxsw_emad_trans_timeout_work(struct work_struct *work)
 635 {
 636         struct mlxsw_reg_trans *trans = container_of(work,
 637                                                      struct mlxsw_reg_trans,
 638                                                      timeout_dw.work);
 639
 640         if (!atomic_dec_and_test(&trans->active))
 641                 return;
 642
 643         mlxsw_emad_transmit_retry(trans->core, trans);
 644 }
 645
 646 static void mlxsw_emad_process_response(struct mlxsw_core *mlxsw_core,
 647                                         struct mlxsw_reg_trans *trans,
 648                                         struct sk_buff *skb)
 649 {
 650         int err;
 651
 652         if (!atomic_dec_and_test(&trans->active))
 653                 return;
 654
 655         err = mlxsw_emad_process_status_skb(skb, &trans->emad_status);
 656         if (err == -EAGAIN) {
 657                 mlxsw_emad_transmit_retry(mlxsw_core, trans);
 658         } else {
 659                 if (err == 0) {
 660                         char *reg_tlv = mlxsw_emad_reg_tlv(skb);
 661
 662                         if (trans->cb)
 663                                 trans->cb(mlxsw_core,
 664                                           mlxsw_emad_reg_payload(reg_tlv),
 665                                           trans->reg->len, trans->cb_priv);
 666                 } else {
 667                         mlxsw_emad_process_string_tlv(skb, trans);
 668                 }
 669                 mlxsw_emad_trans_finish(trans, err);
 670         }
 671 }
 672
 673 /* called with rcu read lock held */
 674 static void mlxsw_emad_rx_listener_func(struct sk_buff *skb, u8 local_port,
 675                                         void *priv)
 676 {
 677         struct mlxsw_core *mlxsw_core = priv;
 678         struct mlxsw_reg_trans *trans;
 679
 680         trace_devlink_hwmsg(priv_to_devlink(mlxsw_core), true, 0,
 681                             skb->data, skb->len);
 682
 683         mlxsw_emad_tlv_parse(skb);
 684
 685         if (!mlxsw_emad_is_resp(skb))
 686                 goto free_skb;
 687
 688         list_for_each_entry_rcu(trans, &mlxsw_core->emad.trans_list, list) {
 689                 if (mlxsw_emad_get_tid(skb) == trans->tid) {
 690                         mlxsw_emad_process_response(mlxsw_core, trans, skb);
 691                         break;
 692                 }
 693         }
 694
 695 free_skb:
 696         dev_kfree_skb(skb);
 697 }
 698
 699 static const struct mlxsw_listener mlxsw_emad_rx_listener =
 700         MLXSW_RXL(mlxsw_emad_rx_listener_func, ETHEMAD, TRAP_TO_CPU, false,
 701                   EMAD, DISCARD);
 702
 703 static int mlxsw_emad_init(struct mlxsw_core *mlxsw_core)
 704 {
 705         struct workqueue_struct *emad_wq;
 706         u64 tid;
 707         int err;
 708
 709         if (!(mlxsw_core->bus->features & MLXSW_BUS_F_TXRX))
 710                 return 0;
 711
 712         emad_wq = alloc_workqueue("mlxsw_core_emad", 0, 0);
 713         if (!emad_wq)
 714                 return -ENOMEM;
 715         mlxsw_core->emad_wq = emad_wq;
 716
 717         /* Set the upper 32 bits of the transaction ID field to a random
 718          * number. This allows us to discard EMADs addressed to other
 719          * devices.
 720          */
 721         get_random_bytes(&tid, 4);
 722         tid <<= 32;
 723         atomic64_set(&mlxsw_core->emad.tid, tid);
 724
 725         INIT_LIST_HEAD(&mlxsw_core->emad.trans_list);
 726         spin_lock_init(&mlxsw_core->emad.trans_list_lock);
 727
 728         err = mlxsw_core_trap_register(mlxsw_core, &mlxsw_emad_rx_listener,
 729                                        mlxsw_core);
 730         if (err)
 731                 goto err_trap_register;
 732
 733         err = mlxsw_core->driver->basic_trap_groups_set(mlxsw_core);
 734         if (err)
 735                 goto err_emad_trap_set;
 736         mlxsw_core->emad.use_emad = true;
 737
 738         return 0;
 739
 740 err_emad_trap_set:
 741         mlxsw_core_trap_unregister(mlxsw_core, &mlxsw_emad_rx_listener,
 742                                    mlxsw_core);
 743 err_trap_register:
 744         destroy_workqueue(mlxsw_core->emad_wq);
 745         return err;
 746 }
 747
 748 static void mlxsw_emad_fini(struct mlxsw_core *mlxsw_core)
 749 {
 750
 751         if (!(mlxsw_core->bus->features & MLXSW_BUS_F_TXRX))
 752                 return;
 753
 754         mlxsw_core->emad.use_emad = false;
 755         mlxsw_core_trap_unregister(mlxsw_core, &mlxsw_emad_rx_listener,
 756                                    mlxsw_core);
 757         destroy_workqueue(mlxsw_core->emad_wq);
 758 }
 759
 760 static struct sk_buff *mlxsw_emad_alloc(const struct mlxsw_core *mlxsw_core,
 761                                         u16 reg_len, bool enable_string_tlv)
 762 {
 763         struct sk_buff *skb;
 764         u16 emad_len;
 765
 766         emad_len = (reg_len + sizeof(u32) + MLXSW_EMAD_ETH_HDR_LEN +
 767                     (MLXSW_EMAD_OP_TLV_LEN + MLXSW_EMAD_END_TLV_LEN) *
 768                     sizeof(u32) + mlxsw_core->driver->txhdr_len);
 769         if (enable_string_tlv)
 770                 emad_len += MLXSW_EMAD_STRING_TLV_LEN * sizeof(u32);
 771         if (emad_len > MLXSW_EMAD_MAX_FRAME_LEN)
 772                 return NULL;
 773
 774         skb = netdev_alloc_skb(NULL, emad_len);
 775         if (!skb)
 776                 return NULL;
 777         memset(skb->data, 0, emad_len);
 778         skb_reserve(skb, emad_len);
 779
 780         return skb;
 781 }
 782
 783 static int mlxsw_emad_reg_access(struct mlxsw_core *mlxsw_core,
 784                                  const struct mlxsw_reg_info *reg,
 785                                  char *payload,
 786                                  enum mlxsw_core_reg_access_type type,
 787                                  struct mlxsw_reg_trans *trans,
 788                                  struct list_head *bulk_list,
 789                                  mlxsw_reg_trans_cb_t *cb,
 790                                  unsigned long cb_priv, u64 tid)
 791 {
 792         bool enable_string_tlv;
 793         struct sk_buff *skb;
 794         int err;
 795
 796         dev_dbg(mlxsw_core->bus_info->dev, "EMAD reg access (tid=%llx,reg_id=%x(%s),type=%s)\n",
 797                 tid, reg->id, mlxsw_reg_id_str(reg->id),
 798                 mlxsw_core_reg_access_type_str(type));
 799
 800         /* Since this can be changed during emad_reg_access, read it once and
 801          * use the value all the way.
 802          */
 803         enable_string_tlv = mlxsw_core->emad.enable_string_tlv;
 804
 805         skb = mlxsw_emad_alloc(mlxsw_core, reg->len, enable_string_tlv);
 806         if (!skb)
 807                 return -ENOMEM;
 808
 809         list_add_tail(&trans->bulk_list, bulk_list);
 810         trans->core = mlxsw_core;
 811         trans->tx_skb = skb;
 812         trans->tx_info.local_port = MLXSW_PORT_CPU_PORT;
 813         trans->tx_info.is_emad = true;
 814         INIT_DELAYED_WORK(&trans->timeout_dw, mlxsw_emad_trans_timeout_work);
 815         trans->tid = tid;
 816         init_completion(&trans->completion);
 817         trans->cb = cb;
 818         trans->cb_priv = cb_priv;
 819         trans->reg = reg;
 820         trans->type = type;
 821
 822         mlxsw_emad_construct(skb, reg, payload, type, trans->tid,
 823                              enable_string_tlv);
 824         mlxsw_core->driver->txhdr_construct(skb, &trans->tx_info);
 825
 826         spin_lock_bh(&mlxsw_core->emad.trans_list_lock);
 827         list_add_tail_rcu(&trans->list, &mlxsw_core->emad.trans_list);
 828         spin_unlock_bh(&mlxsw_core->emad.trans_list_lock);
 829         err = mlxsw_emad_transmit(mlxsw_core, trans);
 830         if (err)
 831                 goto err_out;
 832         return 0;
 833
 834 err_out:
 835         spin_lock_bh(&mlxsw_core->emad.trans_list_lock);
 836         list_del_rcu(&trans->list);
 837         spin_unlock_bh(&mlxsw_core->emad.trans_list_lock);
 838         list_del(&trans->bulk_list);
 839         dev_kfree_skb(trans->tx_skb);
 840         return err;
 841 }
 842
 843 /*****************
 844  * Core functions
 845  *****************/
 846
 847 int mlxsw_core_driver_register(struct mlxsw_driver *mlxsw_driver)
 848 {
 849         spin_lock(&mlxsw_core_driver_list_lock);
 850         list_add_tail(&mlxsw_driver->list, &mlxsw_core_driver_list);
 851         spin_unlock(&mlxsw_core_driver_list_lock);
 852         return 0;
 853 }
 854 EXPORT_SYMBOL(mlxsw_core_driver_register);
 855
 856 void mlxsw_core_driver_unregister(struct mlxsw_driver *mlxsw_driver)
 857 {
 858         spin_lock(&mlxsw_core_driver_list_lock);
 859         list_del(&mlxsw_driver->list);
 860         spin_unlock(&mlxsw_core_driver_list_lock);
 861 }
 862 EXPORT_SYMBOL(mlxsw_core_driver_unregister);
 863
 864 static struct mlxsw_driver *__driver_find(const char *kind)
 865 {
 866         struct mlxsw_driver *mlxsw_driver;
 867
 868         list_for_each_entry(mlxsw_driver, &mlxsw_core_driver_list, list) {
 869                 if (strcmp(mlxsw_driver->kind, kind) == 0)
 870                         return mlxsw_driver;
 871         }
 872         return NULL;
 873 }
 874
 875 static struct mlxsw_driver *mlxsw_core_driver_get(const char *kind)
 876 {
 877         struct mlxsw_driver *mlxsw_driver;
 878
 879         spin_lock(&mlxsw_core_driver_list_lock);
 880         mlxsw_driver = __driver_find(kind);
 881         spin_unlock(&mlxsw_core_driver_list_lock);
 882         return mlxsw_driver;
 883 }
 884
 885 struct mlxsw_core_fw_info {
 886         struct mlxfw_dev mlxfw_dev;
 887         struct mlxsw_core *mlxsw_core;
 888 };
 889
 890 static int mlxsw_core_fw_component_query(struct mlxfw_dev *mlxfw_dev,
 891                                          u16 component_index, u32 *p_max_size,
 892                                          u8 *p_align_bits, u16 *p_max_write_size)
 893 {
 894         struct mlxsw_core_fw_info *mlxsw_core_fw_info =
 895                 container_of(mlxfw_dev, struct mlxsw_core_fw_info, mlxfw_dev);
 896         struct mlxsw_core *mlxsw_core = mlxsw_core_fw_info->mlxsw_core;
 897         char mcqi_pl[MLXSW_REG_MCQI_LEN];
 898         int err;
 899
 900         mlxsw_reg_mcqi_pack(mcqi_pl, component_index);
 901         err = mlxsw_reg_query(mlxsw_core, MLXSW_REG(mcqi), mcqi_pl);
 902         if (err)
 903                 return err;
 904         mlxsw_reg_mcqi_unpack(mcqi_pl, p_max_size, p_align_bits, p_max_write_size);
 905
 906         *p_align_bits = max_t(u8, *p_align_bits, 2);
 907         *p_max_write_size = min_t(u16, *p_max_write_size, MLXSW_REG_MCDA_MAX_DATA_LEN);
 908         return 0;
 909 }
 910
 911 static int mlxsw_core_fw_fsm_lock(struct mlxfw_dev *mlxfw_dev, u32 *fwhandle)
 912 {
 913         struct mlxsw_core_fw_info *mlxsw_core_fw_info =
 914                 container_of(mlxfw_dev, struct mlxsw_core_fw_info, mlxfw_dev);
 915         struct mlxsw_core *mlxsw_core = mlxsw_core_fw_info->mlxsw_core;
 916         char mcc_pl[MLXSW_REG_MCC_LEN];
 917         u8 control_state;
 918         int err;
 919
 920         mlxsw_reg_mcc_pack(mcc_pl, 0, 0, 0, 0);
 921         err = mlxsw_reg_query(mlxsw_core, MLXSW_REG(mcc), mcc_pl);
 922         if (err)
 923                 return err;
 924
 925         mlxsw_reg_mcc_unpack(mcc_pl, fwhandle, NULL, &control_state);
 926         if (control_state != MLXFW_FSM_STATE_IDLE)
 927                 return -EBUSY;
 928
 929         mlxsw_reg_mcc_pack(mcc_pl, MLXSW_REG_MCC_INSTRUCTION_LOCK_UPDATE_HANDLE, 0, *fwhandle, 0);
 930         return mlxsw_reg_write(mlxsw_core, MLXSW_REG(mcc), mcc_pl);
 931 }
 932
 933 static int mlxsw_core_fw_fsm_component_update(struct mlxfw_dev *mlxfw_dev, u32 fwhandle,
 934                                               u16 component_index, u32 component_size)
 935 {
 936         struct mlxsw_core_fw_info *mlxsw_core_fw_info =
 937                 container_of(mlxfw_dev, struct mlxsw_core_fw_info, mlxfw_dev);
 938         struct mlxsw_core *mlxsw_core = mlxsw_core_fw_info->mlxsw_core;
 939         char mcc_pl[MLXSW_REG_MCC_LEN];
 940
 941         mlxsw_reg_mcc_pack(mcc_pl, MLXSW_REG_MCC_INSTRUCTION_UPDATE_COMPONENT,
 942                            component_index, fwhandle, component_size);
 943         return mlxsw_reg_write(mlxsw_core, MLXSW_REG(mcc), mcc_pl);
 944 }
 945
 946 static int mlxsw_core_fw_fsm_block_download(struct mlxfw_dev *mlxfw_dev, u32 fwhandle,
 947                                             u8 *data, u16 size, u32 offset)
 948 {
 949         struct mlxsw_core_fw_info *mlxsw_core_fw_info =
 950                 container_of(mlxfw_dev, struct mlxsw_core_fw_info, mlxfw_dev);
 951         struct mlxsw_core *mlxsw_core = mlxsw_core_fw_info->mlxsw_core;
 952         char mcda_pl[MLXSW_REG_MCDA_LEN];
 953
 954         mlxsw_reg_mcda_pack(mcda_pl, fwhandle, offset, size, data);
 955         return mlxsw_reg_write(mlxsw_core, MLXSW_REG(mcda), mcda_pl);
 956 }
 957
 958 static int mlxsw_core_fw_fsm_component_verify(struct mlxfw_dev *mlxfw_dev, u32 fwhandle,
 959                                               u16 component_index)
 960 {
 961         struct mlxsw_core_fw_info *mlxsw_core_fw_info =
 962                 container_of(mlxfw_dev, struct mlxsw_core_fw_info, mlxfw_dev);
 963         struct mlxsw_core *mlxsw_core = mlxsw_core_fw_info->mlxsw_core;
 964         char mcc_pl[MLXSW_REG_MCC_LEN];
 965
 966         mlxsw_reg_mcc_pack(mcc_pl, MLXSW_REG_MCC_INSTRUCTION_VERIFY_COMPONENT,
 967                            component_index, fwhandle, 0);
 968         return mlxsw_reg_write(mlxsw_core, MLXSW_REG(mcc), mcc_pl);
 969 }
 970
 971 static int mlxsw_core_fw_fsm_activate(struct mlxfw_dev *mlxfw_dev, u32 fwhandle)
 972 {
 973         struct mlxsw_core_fw_info *mlxsw_core_fw_info =
 974                 container_of(mlxfw_dev, struct mlxsw_core_fw_info, mlxfw_dev);
 975         struct mlxsw_core *mlxsw_core = mlxsw_core_fw_info->mlxsw_core;
 976         char mcc_pl[MLXSW_REG_MCC_LEN];
 977
 978         mlxsw_reg_mcc_pack(mcc_pl, MLXSW_REG_MCC_INSTRUCTION_ACTIVATE, 0, fwhandle, 0);
 979         return mlxsw_reg_write(mlxsw_core, MLXSW_REG(mcc), mcc_pl);
 980 }
 981
 982 static int mlxsw_core_fw_fsm_query_state(struct mlxfw_dev *mlxfw_dev, u32 fwhandle,
 983                                          enum mlxfw_fsm_state *fsm_state,
 984                                          enum mlxfw_fsm_state_err *fsm_state_err)
 985 {
 986         struct mlxsw_core_fw_info *mlxsw_core_fw_info =
 987                 container_of(mlxfw_dev, struct mlxsw_core_fw_info, mlxfw_dev);
 988         struct mlxsw_core *mlxsw_core = mlxsw_core_fw_info->mlxsw_core;
 989         char mcc_pl[MLXSW_REG_MCC_LEN];
 990         u8 control_state;
 991         u8 error_code;
 992         int err;
 993
 994         mlxsw_reg_mcc_pack(mcc_pl, 0, 0, fwhandle, 0);
 995         err = mlxsw_reg_query(mlxsw_core, MLXSW_REG(mcc), mcc_pl);
 996         if (err)
 997                 return err;
 998
 999         mlxsw_reg_mcc_unpack(mcc_pl, NULL, &error_code, &control_state);
1000         *fsm_state = control_state;
1001         *fsm_state_err = min_t(enum mlxfw_fsm_state_err, error_code, MLXFW_FSM_STATE_ERR_MAX);
1002         return 0;
1003 }
1004
1005 static void mlxsw_core_fw_fsm_cancel(struct mlxfw_dev *mlxfw_dev, u32 fwhandle)
1006 {
1007         struct mlxsw_core_fw_info *mlxsw_core_fw_info =
1008                 container_of(mlxfw_dev, struct mlxsw_core_fw_info, mlxfw_dev);
1009         struct mlxsw_core *mlxsw_core = mlxsw_core_fw_info->mlxsw_core;
1010         char mcc_pl[MLXSW_REG_MCC_LEN];
1011
1012         mlxsw_reg_mcc_pack(mcc_pl, MLXSW_REG_MCC_INSTRUCTION_CANCEL, 0, fwhandle, 0);
1013         mlxsw_reg_write(mlxsw_core, MLXSW_REG(mcc), mcc_pl);
1014 }
1015
1016 static void mlxsw_core_fw_fsm_release(struct mlxfw_dev *mlxfw_dev, u32 fwhandle)
1017 {
1018         struct mlxsw_core_fw_info *mlxsw_core_fw_info =
1019                 container_of(mlxfw_dev, struct mlxsw_core_fw_info, mlxfw_dev);
1020         struct mlxsw_core *mlxsw_core = mlxsw_core_fw_info->mlxsw_core;
1021         char mcc_pl[MLXSW_REG_MCC_LEN];
1022
1023         mlxsw_reg_mcc_pack(mcc_pl, MLXSW_REG_MCC_INSTRUCTION_RELEASE_UPDATE_HANDLE, 0, fwhandle, 0);
1024         mlxsw_reg_write(mlxsw_core, MLXSW_REG(mcc), mcc_pl);
1025 }
1026
1027 static const struct mlxfw_dev_ops mlxsw_core_fw_mlxsw_dev_ops = {
1028         .component_query        = mlxsw_core_fw_component_query,
1029         .fsm_lock               = mlxsw_core_fw_fsm_lock,
1030         .fsm_component_update   = mlxsw_core_fw_fsm_component_update,
1031         .fsm_block_download     = mlxsw_core_fw_fsm_block_download,
1032         .fsm_component_verify   = mlxsw_core_fw_fsm_component_verify,
1033         .fsm_activate           = mlxsw_core_fw_fsm_activate,
1034         .fsm_query_state        = mlxsw_core_fw_fsm_query_state,
1035         .fsm_cancel             = mlxsw_core_fw_fsm_cancel,
1036         .fsm_release            = mlxsw_core_fw_fsm_release,
1037 };
1038
1039 static int mlxsw_core_fw_flash(struct mlxsw_core *mlxsw_core, const struct firmware *firmware,
1040                                struct netlink_ext_ack *extack)
1041 {
1042         struct mlxsw_core_fw_info mlxsw_core_fw_info = {
1043                 .mlxfw_dev = {
1044                         .ops = &mlxsw_core_fw_mlxsw_dev_ops,
1045                         .psid = mlxsw_core->bus_info->psid,
1046                         .psid_size = strlen(mlxsw_core->bus_info->psid),
1047                         .devlink = priv_to_devlink(mlxsw_core),
1048                 },
1049                 .mlxsw_core = mlxsw_core
1050         };
1051         int err;
1052
1053         mlxsw_core->fw_flash_in_progress = true;
1054         err = mlxfw_firmware_flash(&mlxsw_core_fw_info.mlxfw_dev, firmware, extack);
1055         mlxsw_core->fw_flash_in_progress = false;
1056
1057         return err;
1058 }
1059
1060 static int mlxsw_core_fw_rev_validate(struct mlxsw_core *mlxsw_core,
1061                                       const struct mlxsw_bus_info *mlxsw_bus_info,
1062                                       const struct mlxsw_fw_rev *req_rev,
1063                                       const char *filename)
1064 {
1065         const struct mlxsw_fw_rev *rev = &mlxsw_bus_info->fw_rev;
1066         union devlink_param_value value;
1067         const struct firmware *firmware;
1068         int err;
1069
1070         /* Don't check if driver does not require it */
1071         if (!req_rev || !filename)
1072                 return 0;
1073
1074         /* Don't check if devlink 'fw_load_policy' param is 'flash' */
1075         err = devlink_param_driverinit_value_get(priv_to_devlink(mlxsw_core),
1076                                                  DEVLINK_PARAM_GENERIC_ID_FW_LOAD_POLICY,
1077                                                  &value);
1078         if (err)
1079                 return err;
1080         if (value.vu8 == DEVLINK_PARAM_FW_LOAD_POLICY_VALUE_FLASH)
1081                 return 0;
1082
1083         /* Validate driver & FW are compatible */
1084         if (rev->major != req_rev->major) {
1085                 WARN(1, "Mismatch in major FW version [%d:%d] is never expected; Please contact support\n",
1086                      rev->major, req_rev->major);
1087                 return -EINVAL;
1088         }
1089         if (mlxsw_core_fw_rev_minor_subminor_validate(rev, req_rev))
1090                 return 0;
1091
1092         dev_err(mlxsw_bus_info->dev, "The firmware version %d.%d.%d is incompatible with the driver (required >= %d.%d.%d)\n",
1093                 rev->major, rev->minor, rev->subminor, req_rev->major,
1094                 req_rev->minor, req_rev->subminor);
1095         dev_info(mlxsw_bus_info->dev, "Flashing firmware using file %s\n", filename);
1096
1097         err = request_firmware_direct(&firmware, filename, mlxsw_bus_info->dev);
1098         if (err) {
1099                 dev_err(mlxsw_bus_info->dev, "Could not request firmware file %s\n", filename);
1100                 return err;
1101         }
1102
1103         err = mlxsw_core_fw_flash(mlxsw_core, firmware, NULL);
1104         release_firmware(firmware);
1105         if (err)
1106                 dev_err(mlxsw_bus_info->dev, "Could not upgrade firmware\n");
1107
1108         /* On FW flash success, tell the caller FW reset is needed
1109          * if current FW supports it.
1110          */
1111         if (rev->minor >= req_rev->can_reset_minor)
1112                 return err ? err : -EAGAIN;
1113         else
1114                 return 0;
1115 }
1116
1117 static int mlxsw_core_fw_flash_update(struct mlxsw_core *mlxsw_core,
1118                                       struct devlink_flash_update_params *params,
1119                                       struct netlink_ext_ack *extack)
1120 {
1121         return mlxsw_core_fw_flash(mlxsw_core, params->fw, extack);
1122 }
1123
1124 static int mlxsw_core_devlink_param_fw_load_policy_validate(struct devlink *devlink, u32 id,
1125                                                             union devlink_param_value val,
1126                                                             struct netlink_ext_ack *extack)
1127 {
1128         if (val.vu8 != DEVLINK_PARAM_FW_LOAD_POLICY_VALUE_DRIVER &&
1129             val.vu8 != DEVLINK_PARAM_FW_LOAD_POLICY_VALUE_FLASH) {
1130                 NL_SET_ERR_MSG_MOD(extack, "'fw_load_policy' must be 'driver' or 'flash'");
1131                 return -EINVAL;
1132         }
1133
1134         return 0;
1135 }
1136
1137 static const struct devlink_param mlxsw_core_fw_devlink_params[] = {
1138         DEVLINK_PARAM_GENERIC(FW_LOAD_POLICY, BIT(DEVLINK_PARAM_CMODE_DRIVERINIT), NULL, NULL,
1139                               mlxsw_core_devlink_param_fw_load_policy_validate),
1140 };
1141
1142 static int mlxsw_core_fw_params_register(struct mlxsw_core *mlxsw_core)
1143 {
1144         struct devlink *devlink = priv_to_devlink(mlxsw_core);
1145         union devlink_param_value value;
1146         int err;
1147
1148         err = devlink_params_register(devlink, mlxsw_core_fw_devlink_params,
1149                                       ARRAY_SIZE(mlxsw_core_fw_devlink_params));
1150         if (err)
1151                 return err;
1152
1153         value.vu8 = DEVLINK_PARAM_FW_LOAD_POLICY_VALUE_DRIVER;
1154         devlink_param_driverinit_value_set(devlink, DEVLINK_PARAM_GENERIC_ID_FW_LOAD_POLICY, value);
1155         return 0;
1156 }
1157
1158 static void mlxsw_core_fw_params_unregister(struct mlxsw_core *mlxsw_core)
1159 {
1160         devlink_params_unregister(priv_to_devlink(mlxsw_core), mlxsw_core_fw_devlink_params,
1161                                   ARRAY_SIZE(mlxsw_core_fw_devlink_params));
1162 }
1163
1164 static int mlxsw_devlink_port_split(struct devlink *devlink,
1165                                     unsigned int port_index,
1166                                     unsigned int count,
1167                                     struct netlink_ext_ack *extack)
1168 {
1169         struct mlxsw_core *mlxsw_core = devlink_priv(devlink);
1170
1171         if (port_index >= mlxsw_core->max_ports) {
1172                 NL_SET_ERR_MSG_MOD(extack, "Port index exceeds maximum number of ports");
1173                 return -EINVAL;
1174         }
1175         if (!mlxsw_core->driver->port_split)
1176                 return -EOPNOTSUPP;
1177         return mlxsw_core->driver->port_split(mlxsw_core, port_index, count,
1178                                               extack);
1179 }
1180
1181 static int mlxsw_devlink_port_unsplit(struct devlink *devlink,
1182                                       unsigned int port_index,
1183                                       struct netlink_ext_ack *extack)
1184 {
1185         struct mlxsw_core *mlxsw_core = devlink_priv(devlink);
1186
1187         if (port_index >= mlxsw_core->max_ports) {
1188                 NL_SET_ERR_MSG_MOD(extack, "Port index exceeds maximum number of ports");
1189                 return -EINVAL;
1190         }
1191         if (!mlxsw_core->driver->port_unsplit)
1192                 return -EOPNOTSUPP;
1193         return mlxsw_core->driver->port_unsplit(mlxsw_core, port_index,
1194                                                 extack);
1195 }
1196
1197 static int
1198 mlxsw_devlink_sb_pool_get(struct devlink *devlink,
1199                           unsigned int sb_index, u16 pool_index,
1200                           struct devlink_sb_pool_info *pool_info)
1201 {
1202         struct mlxsw_core *mlxsw_core = devlink_priv(devlink);
1203         struct mlxsw_driver *mlxsw_driver = mlxsw_core->driver;
1204
1205         if (!mlxsw_driver->sb_pool_get)
1206                 return -EOPNOTSUPP;
1207         return mlxsw_driver->sb_pool_get(mlxsw_core, sb_index,
1208                                          pool_index, pool_info);
1209 }
1210
1211 static int
1212 mlxsw_devlink_sb_pool_set(struct devlink *devlink,
1213                           unsigned int sb_index, u16 pool_index, u32 size,
1214                           enum devlink_sb_threshold_type threshold_type,
1215                           struct netlink_ext_ack *extack)
1216 {
1217         struct mlxsw_core *mlxsw_core = devlink_priv(devlink);
1218         struct mlxsw_driver *mlxsw_driver = mlxsw_core->driver;
1219
1220         if (!mlxsw_driver->sb_pool_set)
1221                 return -EOPNOTSUPP;
1222         return mlxsw_driver->sb_pool_set(mlxsw_core, sb_index,
1223                                          pool_index, size, threshold_type,
1224                                          extack);
1225 }
1226
1227 static void *__dl_port(struct devlink_port *devlink_port)
1228 {
1229         return container_of(devlink_port, struct mlxsw_core_port, devlink_port);
1230 }
1231
1232 static int mlxsw_devlink_port_type_set(struct devlink_port *devlink_port,
1233                                        enum devlink_port_type port_type)
1234 {
1235         struct mlxsw_core *mlxsw_core = devlink_priv(devlink_port->devlink);
1236         struct mlxsw_driver *mlxsw_driver = mlxsw_core->driver;
1237         struct mlxsw_core_port *mlxsw_core_port = __dl_port(devlink_port);
1238
1239         if (!mlxsw_driver->port_type_set)
1240                 return -EOPNOTSUPP;
1241
1242         return mlxsw_driver->port_type_set(mlxsw_core,
1243                                            mlxsw_core_port->local_port,
1244                                            port_type);
1245 }
1246
1247 static int mlxsw_devlink_sb_port_pool_get(struct devlink_port *devlink_port,
1248                                           unsigned int sb_index, u16 pool_index,
1249                                           u32 *p_threshold)
1250 {
1251         struct mlxsw_core *mlxsw_core = devlink_priv(devlink_port->devlink);
1252         struct mlxsw_driver *mlxsw_driver = mlxsw_core->driver;
1253         struct mlxsw_core_port *mlxsw_core_port = __dl_port(devlink_port);
1254
1255         if (!mlxsw_driver->sb_port_pool_get ||
1256             !mlxsw_core_port_check(mlxsw_core_port))
1257                 return -EOPNOTSUPP;
1258         return mlxsw_driver->sb_port_pool_get(mlxsw_core_port, sb_index,
1259                                               pool_index, p_threshold);
1260 }
1261
1262 static int mlxsw_devlink_sb_port_pool_set(struct devlink_port *devlink_port,
1263                                           unsigned int sb_index, u16 pool_index,
1264                                           u32 threshold,
1265                                           struct netlink_ext_ack *extack)
1266 {
1267         struct mlxsw_core *mlxsw_core = devlink_priv(devlink_port->devlink);
1268         struct mlxsw_driver *mlxsw_driver = mlxsw_core->driver;
1269         struct mlxsw_core_port *mlxsw_core_port = __dl_port(devlink_port);
1270
1271         if (!mlxsw_driver->sb_port_pool_set ||
1272             !mlxsw_core_port_check(mlxsw_core_port))
1273                 return -EOPNOTSUPP;
1274         return mlxsw_driver->sb_port_pool_set(mlxsw_core_port, sb_index,
1275                                               pool_index, threshold, extack);
1276 }
1277
1278 static int
1279 mlxsw_devlink_sb_tc_pool_bind_get(struct devlink_port *devlink_port,
1280                                   unsigned int sb_index, u16 tc_index,
1281                                   enum devlink_sb_pool_type pool_type,
1282                                   u16 *p_pool_index, u32 *p_threshold)
1283 {
1284         struct mlxsw_core *mlxsw_core = devlink_priv(devlink_port->devlink);
1285         struct mlxsw_driver *mlxsw_driver = mlxsw_core->driver;
1286         struct mlxsw_core_port *mlxsw_core_port = __dl_port(devlink_port);
1287
1288         if (!mlxsw_driver->sb_tc_pool_bind_get ||
1289             !mlxsw_core_port_check(mlxsw_core_port))
1290                 return -EOPNOTSUPP;
1291         return mlxsw_driver->sb_tc_pool_bind_get(mlxsw_core_port, sb_index,
1292                                                  tc_index, pool_type,
1293                                                  p_pool_index, p_threshold);
1294 }
1295
1296 static int
1297 mlxsw_devlink_sb_tc_pool_bind_set(struct devlink_port *devlink_port,
1298                                   unsigned int sb_index, u16 tc_index,
1299                                   enum devlink_sb_pool_type pool_type,
1300                                   u16 pool_index, u32 threshold,
1301                                   struct netlink_ext_ack *extack)
1302 {
1303         struct mlxsw_core *mlxsw_core = devlink_priv(devlink_port->devlink);
1304         struct mlxsw_driver *mlxsw_driver = mlxsw_core->driver;
1305         struct mlxsw_core_port *mlxsw_core_port = __dl_port(devlink_port);
1306
1307         if (!mlxsw_driver->sb_tc_pool_bind_set ||
1308             !mlxsw_core_port_check(mlxsw_core_port))
1309                 return -EOPNOTSUPP;
1310         return mlxsw_driver->sb_tc_pool_bind_set(mlxsw_core_port, sb_index,
1311                                                  tc_index, pool_type,
1312                                                  pool_index, threshold, extack);
1313 }
1314
1315 static int mlxsw_devlink_sb_occ_snapshot(struct devlink *devlink,
1316                                          unsigned int sb_index)
1317 {
1318         struct mlxsw_core *mlxsw_core = devlink_priv(devlink);
1319         struct mlxsw_driver *mlxsw_driver = mlxsw_core->driver;
1320
1321         if (!mlxsw_driver->sb_occ_snapshot)
1322                 return -EOPNOTSUPP;
1323         return mlxsw_driver->sb_occ_snapshot(mlxsw_core, sb_index);
1324 }
1325
1326 static int mlxsw_devlink_sb_occ_max_clear(struct devlink *devlink,
1327                                           unsigned int sb_index)
1328 {
1329         struct mlxsw_core *mlxsw_core = devlink_priv(devlink);
1330         struct mlxsw_driver *mlxsw_driver = mlxsw_core->driver;
1331
1332         if (!mlxsw_driver->sb_occ_max_clear)
1333                 return -EOPNOTSUPP;
1334         return mlxsw_driver->sb_occ_max_clear(mlxsw_core, sb_index);
1335 }
1336
1337 static int
1338 mlxsw_devlink_sb_occ_port_pool_get(struct devlink_port *devlink_port,
1339                                    unsigned int sb_index, u16 pool_index,
1340                                    u32 *p_cur, u32 *p_max)
1341 {
1342         struct mlxsw_core *mlxsw_core = devlink_priv(devlink_port->devlink);
1343         struct mlxsw_driver *mlxsw_driver = mlxsw_core->driver;
1344         struct mlxsw_core_port *mlxsw_core_port = __dl_port(devlink_port);
1345
1346         if (!mlxsw_driver->sb_occ_port_pool_get ||
1347             !mlxsw_core_port_check(mlxsw_core_port))
1348                 return -EOPNOTSUPP;
1349         return mlxsw_driver->sb_occ_port_pool_get(mlxsw_core_port, sb_index,
1350                                                   pool_index, p_cur, p_max);
1351 }
1352
1353 static int
1354 mlxsw_devlink_sb_occ_tc_port_bind_get(struct devlink_port *devlink_port,
1355                                       unsigned int sb_index, u16 tc_index,
1356                                       enum devlink_sb_pool_type pool_type,
1357                                       u32 *p_cur, u32 *p_max)
1358 {
1359         struct mlxsw_core *mlxsw_core = devlink_priv(devlink_port->devlink);
1360         struct mlxsw_driver *mlxsw_driver = mlxsw_core->driver;
1361         struct mlxsw_core_port *mlxsw_core_port = __dl_port(devlink_port);
1362
1363         if (!mlxsw_driver->sb_occ_tc_port_bind_get ||
1364             !mlxsw_core_port_check(mlxsw_core_port))
1365                 return -EOPNOTSUPP;
1366         return mlxsw_driver->sb_occ_tc_port_bind_get(mlxsw_core_port,
1367                                                      sb_index, tc_index,
1368                                                      pool_type, p_cur, p_max);
1369 }
1370
1371 static int
1372 mlxsw_devlink_info_get(struct devlink *devlink, struct devlink_info_req *req,
1373                        struct netlink_ext_ack *extack)
1374 {
1375         struct mlxsw_core *mlxsw_core = devlink_priv(devlink);
1376         char fw_info_psid[MLXSW_REG_MGIR_FW_INFO_PSID_SIZE];
1377         u32 hw_rev, fw_major, fw_minor, fw_sub_minor;
1378         char mgir_pl[MLXSW_REG_MGIR_LEN];
1379         char buf[32];
1380         int err;
1381
1382         err = devlink_info_driver_name_put(req,
1383                                            mlxsw_core->bus_info->device_kind);
1384         if (err)
1385                 return err;
1386
1387         mlxsw_reg_mgir_pack(mgir_pl);
1388         err = mlxsw_reg_query(mlxsw_core, MLXSW_REG(mgir), mgir_pl);
1389         if (err)
1390                 return err;
1391         mlxsw_reg_mgir_unpack(mgir_pl, &hw_rev, fw_info_psid, &fw_major,
1392                               &fw_minor, &fw_sub_minor);
1393
1394         sprintf(buf, "%X", hw_rev);
1395         err = devlink_info_version_fixed_put(req, "hw.revision", buf);
1396         if (err)
1397                 return err;
1398
1399         err = devlink_info_version_fixed_put(req, "fw.psid", fw_info_psid);
1400         if (err)
1401                 return err;
1402
1403         sprintf(buf, "%d.%d.%d", fw_major, fw_minor, fw_sub_minor);
1404         err = devlink_info_version_running_put(req, "fw.version", buf);
1405         if (err)
1406                 return err;
1407
1408         return 0;
1409 }
1410
1411 static int
1412 mlxsw_devlink_core_bus_device_reload_down(struct devlink *devlink,
1413                                           bool netns_change, enum devlink_reload_action action,
1414                                           enum devlink_reload_limit limit,
1415                                           struct netlink_ext_ack *extack)
1416 {
1417         struct mlxsw_core *mlxsw_core = devlink_priv(devlink);
1418
1419         if (!(mlxsw_core->bus->features & MLXSW_BUS_F_RESET))
1420                 return -EOPNOTSUPP;
1421
1422         mlxsw_core_bus_device_unregister(mlxsw_core, true);
1423         return 0;
1424 }
1425
1426 static int
1427 mlxsw_devlink_core_bus_device_reload_up(struct devlink *devlink, enum devlink_reload_action action,
1428                                         enum devlink_reload_limit limit, u32 *actions_performed,
1429                                         struct netlink_ext_ack *extack)
1430 {
1431         struct mlxsw_core *mlxsw_core = devlink_priv(devlink);
1432
1433         *actions_performed = BIT(DEVLINK_RELOAD_ACTION_DRIVER_REINIT) |
1434                              BIT(DEVLINK_RELOAD_ACTION_FW_ACTIVATE);
1435         return mlxsw_core_bus_device_register(mlxsw_core->bus_info,
1436                                               mlxsw_core->bus,
1437                                               mlxsw_core->bus_priv, true,
1438                                               devlink, extack);
1439 }
1440
1441 static int mlxsw_devlink_flash_update(struct devlink *devlink,
1442                                       struct devlink_flash_update_params *params,
1443                                       struct netlink_ext_ack *extack)
1444 {
1445         struct mlxsw_core *mlxsw_core = devlink_priv(devlink);
1446
1447         return mlxsw_core_fw_flash_update(mlxsw_core, params, extack);
1448 }
1449
1450 static int mlxsw_devlink_trap_init(struct devlink *devlink,
1451                                    const struct devlink_trap *trap,
1452                                    void *trap_ctx)
1453 {
1454         struct mlxsw_core *mlxsw_core = devlink_priv(devlink);
1455         struct mlxsw_driver *mlxsw_driver = mlxsw_core->driver;
1456
1457         if (!mlxsw_driver->trap_init)
1458                 return -EOPNOTSUPP;
1459         return mlxsw_driver->trap_init(mlxsw_core, trap, trap_ctx);
1460 }
1461
1462 static void mlxsw_devlink_trap_fini(struct devlink *devlink,
1463                                     const struct devlink_trap *trap,
1464                                     void *trap_ctx)
1465 {
1466         struct mlxsw_core *mlxsw_core = devlink_priv(devlink);
1467         struct mlxsw_driver *mlxsw_driver = mlxsw_core->driver;
1468
1469         if (!mlxsw_driver->trap_fini)
1470                 return;
1471         mlxsw_driver->trap_fini(mlxsw_core, trap, trap_ctx);
1472 }
1473
1474 static int mlxsw_devlink_trap_action_set(struct devlink *devlink,
1475                                          const struct devlink_trap *trap,
1476                                          enum devlink_trap_action action,
1477                                          struct netlink_ext_ack *extack)
1478 {
1479         struct mlxsw_core *mlxsw_core = devlink_priv(devlink);
1480         struct mlxsw_driver *mlxsw_driver = mlxsw_core->driver;
1481
1482         if (!mlxsw_driver->trap_action_set)
1483                 return -EOPNOTSUPP;
1484         return mlxsw_driver->trap_action_set(mlxsw_core, trap, action, extack);
1485 }
1486
1487 static int
1488 mlxsw_devlink_trap_group_init(struct devlink *devlink,
1489                               const struct devlink_trap_group *group)
1490 {
1491         struct mlxsw_core *mlxsw_core = devlink_priv(devlink);
1492         struct mlxsw_driver *mlxsw_driver = mlxsw_core->driver;
1493
1494         if (!mlxsw_driver->trap_group_init)
1495                 return -EOPNOTSUPP;
1496         return mlxsw_driver->trap_group_init(mlxsw_core, group);
1497 }
1498
1499 static int
1500 mlxsw_devlink_trap_group_set(struct devlink *devlink,
1501                              const struct devlink_trap_group *group,
1502                              const struct devlink_trap_policer *policer,
1503                              struct netlink_ext_ack *extack)
1504 {
1505         struct mlxsw_core *mlxsw_core = devlink_priv(devlink);
1506         struct mlxsw_driver *mlxsw_driver = mlxsw_core->driver;
1507
1508         if (!mlxsw_driver->trap_group_set)
1509                 return -EOPNOTSUPP;
1510         return mlxsw_driver->trap_group_set(mlxsw_core, group, policer, extack);
1511 }
1512
1513 static int
1514 mlxsw_devlink_trap_policer_init(struct devlink *devlink,
1515                                 const struct devlink_trap_policer *policer)
1516 {
1517         struct mlxsw_core *mlxsw_core = devlink_priv(devlink);
1518         struct mlxsw_driver *mlxsw_driver = mlxsw_core->driver;
1519
1520         if (!mlxsw_driver->trap_policer_init)
1521                 return -EOPNOTSUPP;
1522         return mlxsw_driver->trap_policer_init(mlxsw_core, policer);
1523 }
1524
1525 static void
1526 mlxsw_devlink_trap_policer_fini(struct devlink *devlink,
1527                                 const struct devlink_trap_policer *policer)
1528 {
1529         struct mlxsw_core *mlxsw_core = devlink_priv(devlink);
1530         struct mlxsw_driver *mlxsw_driver = mlxsw_core->driver;
1531
1532         if (!mlxsw_driver->trap_policer_fini)
1533                 return;
1534         mlxsw_driver->trap_policer_fini(mlxsw_core, policer);
1535 }
1536
1537 static int
1538 mlxsw_devlink_trap_policer_set(struct devlink *devlink,
1539                                const struct devlink_trap_policer *policer,
1540                                u64 rate, u64 burst,
1541                                struct netlink_ext_ack *extack)
1542 {
1543         struct mlxsw_core *mlxsw_core = devlink_priv(devlink);
1544         struct mlxsw_driver *mlxsw_driver = mlxsw_core->driver;
1545
1546         if (!mlxsw_driver->trap_policer_set)
1547                 return -EOPNOTSUPP;
1548         return mlxsw_driver->trap_policer_set(mlxsw_core, policer, rate, burst,
1549                                               extack);
1550 }
1551
1552 static int
1553 mlxsw_devlink_trap_policer_counter_get(struct devlink *devlink,
1554                                        const struct devlink_trap_policer *policer,
1555                                        u64 *p_drops)
1556 {
1557         struct mlxsw_core *mlxsw_core = devlink_priv(devlink);
1558         struct mlxsw_driver *mlxsw_driver = mlxsw_core->driver;
1559
1560         if (!mlxsw_driver->trap_policer_counter_get)
1561                 return -EOPNOTSUPP;
1562         return mlxsw_driver->trap_policer_counter_get(mlxsw_core, policer,
1563                                                       p_drops);
1564 }
1565
1566 static const struct devlink_ops mlxsw_devlink_ops = {
1567         .reload_actions         = BIT(DEVLINK_RELOAD_ACTION_DRIVER_REINIT) |
1568                                   BIT(DEVLINK_RELOAD_ACTION_FW_ACTIVATE),
1569         .reload_down            = mlxsw_devlink_core_bus_device_reload_down,
1570         .reload_up              = mlxsw_devlink_core_bus_device_reload_up,
1571         .port_type_set                  = mlxsw_devlink_port_type_set,
1572         .port_split                     = mlxsw_devlink_port_split,
1573         .port_unsplit                   = mlxsw_devlink_port_unsplit,
1574         .sb_pool_get                    = mlxsw_devlink_sb_pool_get,
1575         .sb_pool_set                    = mlxsw_devlink_sb_pool_set,
1576         .sb_port_pool_get               = mlxsw_devlink_sb_port_pool_get,
1577         .sb_port_pool_set               = mlxsw_devlink_sb_port_pool_set,
1578         .sb_tc_pool_bind_get            = mlxsw_devlink_sb_tc_pool_bind_get,
1579         .sb_tc_pool_bind_set            = mlxsw_devlink_sb_tc_pool_bind_set,
1580         .sb_occ_snapshot                = mlxsw_devlink_sb_occ_snapshot,
1581         .sb_occ_max_clear               = mlxsw_devlink_sb_occ_max_clear,
1582         .sb_occ_port_pool_get           = mlxsw_devlink_sb_occ_port_pool_get,
1583         .sb_occ_tc_port_bind_get        = mlxsw_devlink_sb_occ_tc_port_bind_get,
1584         .info_get                       = mlxsw_devlink_info_get,
1585         .flash_update                   = mlxsw_devlink_flash_update,
1586         .trap_init                      = mlxsw_devlink_trap_init,
1587         .trap_fini                      = mlxsw_devlink_trap_fini,
1588         .trap_action_set                = mlxsw_devlink_trap_action_set,
1589         .trap_group_init                = mlxsw_devlink_trap_group_init,
1590         .trap_group_set                 = mlxsw_devlink_trap_group_set,
1591         .trap_policer_init              = mlxsw_devlink_trap_policer_init,
1592         .trap_policer_fini              = mlxsw_devlink_trap_policer_fini,
1593         .trap_policer_set               = mlxsw_devlink_trap_policer_set,
1594         .trap_policer_counter_get       = mlxsw_devlink_trap_policer_counter_get,
1595 };
1596
1597 static int mlxsw_core_params_register(struct mlxsw_core *mlxsw_core)
1598 {
1599         int err;
1600
1601         err = mlxsw_core_fw_params_register(mlxsw_core);
1602         if (err)
1603                 return err;
1604
1605         if (mlxsw_core->driver->params_register) {
1606                 err = mlxsw_core->driver->params_register(mlxsw_core);
1607                 if (err)
1608                         goto err_params_register;
1609         }
1610         return 0;
1611
1612 err_params_register:
1613         mlxsw_core_fw_params_unregister(mlxsw_core);
1614         return err;
1615 }
1616
1617 static void mlxsw_core_params_unregister(struct mlxsw_core *mlxsw_core)
1618 {
1619         mlxsw_core_fw_params_unregister(mlxsw_core);
1620         if (mlxsw_core->driver->params_register)
1621                 mlxsw_core->driver->params_unregister(mlxsw_core);
1622 }
1623
1624 struct mlxsw_core_health_event {
1625         struct mlxsw_core *mlxsw_core;
1626         char mfde_pl[MLXSW_REG_MFDE_LEN];
1627         struct work_struct work;
1628 };
1629
1630 static void mlxsw_core_health_event_work(struct work_struct *work)
1631 {
1632         struct mlxsw_core_health_event *event;
1633         struct mlxsw_core *mlxsw_core;
1634
1635         event = container_of(work, struct mlxsw_core_health_event, work);
1636         mlxsw_core = event->mlxsw_core;
1637         devlink_health_report(mlxsw_core->health.fw_fatal, "FW fatal event occurred",
1638                               event->mfde_pl);
1639         kfree(event);
1640 }
1641
1642 static void mlxsw_core_health_listener_func(const struct mlxsw_reg_info *reg,
1643                                             char *mfde_pl, void *priv)
1644 {
1645         struct mlxsw_core_health_event *event;
1646         struct mlxsw_core *mlxsw_core = priv;
1647
1648         event = kmalloc(sizeof(*event), GFP_ATOMIC);
1649         if (!event)
1650                 return;
1651         event->mlxsw_core = mlxsw_core;
1652         memcpy(event->mfde_pl, mfde_pl, sizeof(event->mfde_pl));
1653         INIT_WORK(&event->work, mlxsw_core_health_event_work);
1654         mlxsw_core_schedule_work(&event->work);
1655 }
1656
1657 static const struct mlxsw_listener mlxsw_core_health_listener =
1658         MLXSW_EVENTL(mlxsw_core_health_listener_func, MFDE, MFDE);
1659
1660 static int mlxsw_core_health_fw_fatal_dump(struct devlink_health_reporter *reporter,
1661                                            struct devlink_fmsg *fmsg, void *priv_ctx,
1662                                            struct netlink_ext_ack *extack)
1663 {
1664         char *mfde_pl = priv_ctx;
1665         char *val_str;
1666         u8 event_id;
1667         u32 val;
1668         int err;
1669
1670         if (!priv_ctx)
1671                 /* User-triggered dumps are not possible */
1672                 return -EOPNOTSUPP;
1673
1674         val = mlxsw_reg_mfde_irisc_id_get(mfde_pl);
1675         err = devlink_fmsg_u8_pair_put(fmsg, "irisc_id", val);
1676         if (err)
1677                 return err;
1678         err = devlink_fmsg_arr_pair_nest_start(fmsg, "event");
1679         if (err)
1680                 return err;
1681
1682         event_id = mlxsw_reg_mfde_event_id_get(mfde_pl);
1683         err = devlink_fmsg_u8_pair_put(fmsg, "id", event_id);
1684         if (err)
1685                 return err;
1686         switch (event_id) {
1687         case MLXSW_REG_MFDE_EVENT_ID_CRSPACE_TO:
1688                 val_str = "CR space timeout";
1689                 break;
1690         case MLXSW_REG_MFDE_EVENT_ID_KVD_IM_STOP:
1691                 val_str = "KVD insertion machine stopped";
1692                 break;
1693         default:
1694                 val_str = NULL;
1695         }
1696         if (val_str) {
1697                 err = devlink_fmsg_string_pair_put(fmsg, "desc", val_str);
1698                 if (err)
1699                         return err;
1700         }
1701         err = devlink_fmsg_arr_pair_nest_end(fmsg);
1702         if (err)
1703                 return err;
1704
1705         val = mlxsw_reg_mfde_method_get(mfde_pl);
1706         switch (val) {
1707         case MLXSW_REG_MFDE_METHOD_QUERY:
1708                 val_str = "query";
1709                 break;
1710         case MLXSW_REG_MFDE_METHOD_WRITE:
1711                 val_str = "write";
1712                 break;
1713         default:
1714                 val_str = NULL;
1715         }
1716         if (val_str) {
1717                 err = devlink_fmsg_string_pair_put(fmsg, "method", val_str);
1718                 if (err)
1719                         return err;
1720         }
1721
1722         val = mlxsw_reg_mfde_long_process_get(mfde_pl);
1723         err = devlink_fmsg_bool_pair_put(fmsg, "long_process", val);
1724         if (err)
1725                 return err;
1726
1727         val = mlxsw_reg_mfde_command_type_get(mfde_pl);
1728         switch (val) {
1729         case MLXSW_REG_MFDE_COMMAND_TYPE_MAD:
1730                 val_str = "mad";
1731                 break;
1732         case MLXSW_REG_MFDE_COMMAND_TYPE_EMAD:
1733                 val_str = "emad";
1734                 break;
1735         case MLXSW_REG_MFDE_COMMAND_TYPE_CMDIF:
1736                 val_str = "cmdif";
1737                 break;
1738         default:
1739                 val_str = NULL;
1740         }
1741         if (val_str) {
1742                 err = devlink_fmsg_string_pair_put(fmsg, "command_type", val_str);
1743                 if (err)
1744                         return err;
1745         }
1746
1747         val = mlxsw_reg_mfde_reg_attr_id_get(mfde_pl);
1748         err = devlink_fmsg_u32_pair_put(fmsg, "reg_attr_id", val);
1749         if (err)
1750                 return err;
1751
1752         if (event_id == MLXSW_REG_MFDE_EVENT_ID_CRSPACE_TO) {
1753                 val = mlxsw_reg_mfde_log_address_get(mfde_pl);
1754                 err = devlink_fmsg_u32_pair_put(fmsg, "log_address", val);
1755                 if (err)
1756                         return err;
1757                 val = mlxsw_reg_mfde_log_id_get(mfde_pl);
1758                 err = devlink_fmsg_u8_pair_put(fmsg, "log_irisc_id", val);
1759                 if (err)
1760                         return err;
1761         } else if (event_id == MLXSW_REG_MFDE_EVENT_ID_KVD_IM_STOP) {
1762                 val = mlxsw_reg_mfde_pipes_mask_get(mfde_pl);
1763                 err = devlink_fmsg_u32_pair_put(fmsg, "pipes_mask", val);
1764                 if (err)
1765                         return err;
1766         }
1767
1768         return 0;
1769 }
1770
1771 static int
1772 mlxsw_core_health_fw_fatal_test(struct devlink_health_reporter *reporter,
1773                                 struct netlink_ext_ack *extack)
1774 {
1775         struct mlxsw_core *mlxsw_core = devlink_health_reporter_priv(reporter);
1776         char mfgd_pl[MLXSW_REG_MFGD_LEN];
1777         int err;
1778
1779         /* Read the register first to make sure no other bits are changed. */
1780         err = mlxsw_reg_query(mlxsw_core, MLXSW_REG(mfgd), mfgd_pl);
1781         if (err)
1782                 return err;
1783         mlxsw_reg_mfgd_trigger_test_set(mfgd_pl, true);
1784         return mlxsw_reg_write(mlxsw_core, MLXSW_REG(mfgd), mfgd_pl);
1785 }
1786
1787 static const struct devlink_health_reporter_ops
1788 mlxsw_core_health_fw_fatal_ops = {
1789         .name = "fw_fatal",
1790         .dump = mlxsw_core_health_fw_fatal_dump,
1791         .test = mlxsw_core_health_fw_fatal_test,
1792 };
1793
1794 static int mlxsw_core_health_fw_fatal_config(struct mlxsw_core *mlxsw_core,
1795                                              bool enable)
1796 {
1797         char mfgd_pl[MLXSW_REG_MFGD_LEN];
1798         int err;
1799
1800         /* Read the register first to make sure no other bits are changed. */
1801         err = mlxsw_reg_query(mlxsw_core, MLXSW_REG(mfgd), mfgd_pl);
1802         if (err)
1803                 return err;
1804         mlxsw_reg_mfgd_fatal_event_mode_set(mfgd_pl, enable);
1805         return mlxsw_reg_write(mlxsw_core, MLXSW_REG(mfgd), mfgd_pl);
1806 }
1807
1808 static int mlxsw_core_health_init(struct mlxsw_core *mlxsw_core)
1809 {
1810         struct devlink *devlink = priv_to_devlink(mlxsw_core);
1811         struct devlink_health_reporter *fw_fatal;
1812         int err;
1813
1814         if (!mlxsw_core->driver->fw_fatal_enabled)
1815                 return 0;
1816
1817         fw_fatal = devlink_health_reporter_create(devlink, &mlxsw_core_health_fw_fatal_ops,
1818                                                   0, mlxsw_core);
1819         if (IS_ERR(fw_fatal)) {
1820                 dev_err(mlxsw_core->bus_info->dev, "Failed to create fw fatal reporter");
1821                 return PTR_ERR(fw_fatal);
1822         }
1823         mlxsw_core->health.fw_fatal = fw_fatal;
1824
1825         err = mlxsw_core_trap_register(mlxsw_core, &mlxsw_core_health_listener, mlxsw_core);
1826         if (err)
1827                 goto err_trap_register;
1828
1829         err = mlxsw_core_health_fw_fatal_config(mlxsw_core, true);
1830         if (err)
1831                 goto err_fw_fatal_config;
1832
1833         return 0;
1834
1835 err_fw_fatal_config:
1836         mlxsw_core_trap_unregister(mlxsw_core, &mlxsw_core_health_listener, mlxsw_core);
1837 err_trap_register:
1838         devlink_health_reporter_destroy(mlxsw_core->health.fw_fatal);
1839         return err;
1840 }
1841
1842 static void mlxsw_core_health_fini(struct mlxsw_core *mlxsw_core)
1843 {
1844         if (!mlxsw_core->driver->fw_fatal_enabled)
1845                 return;
1846
1847         mlxsw_core_health_fw_fatal_config(mlxsw_core, false);
1848         mlxsw_core_trap_unregister(mlxsw_core, &mlxsw_core_health_listener, mlxsw_core);
1849         /* Make sure there is no more event work scheduled */
1850         mlxsw_core_flush_owq();
1851         devlink_health_reporter_destroy(mlxsw_core->health.fw_fatal);
1852 }
1853
1854 static int
1855 __mlxsw_core_bus_device_register(const struct mlxsw_bus_info *mlxsw_bus_info,
1856                                  const struct mlxsw_bus *mlxsw_bus,
1857                                  void *bus_priv, bool reload,
1858                                  struct devlink *devlink,
1859                                  struct netlink_ext_ack *extack)
1860 {
1861         const char *device_kind = mlxsw_bus_info->device_kind;
1862         struct mlxsw_core *mlxsw_core;
1863         struct mlxsw_driver *mlxsw_driver;
1864         struct mlxsw_res *res;
1865         size_t alloc_size;
1866         int err;
1867
1868         mlxsw_driver = mlxsw_core_driver_get(device_kind);
1869         if (!mlxsw_driver)
1870                 return -EINVAL;
1871
1872         if (!reload) {
1873                 alloc_size = sizeof(*mlxsw_core) + mlxsw_driver->priv_size;
1874                 devlink = devlink_alloc(&mlxsw_devlink_ops, alloc_size);
1875                 if (!devlink) {
1876                         err = -ENOMEM;
1877                         goto err_devlink_alloc;
1878                 }
1879         }
1880
1881         mlxsw_core = devlink_priv(devlink);
1882         INIT_LIST_HEAD(&mlxsw_core->rx_listener_list);
1883         INIT_LIST_HEAD(&mlxsw_core->event_listener_list);
1884         mlxsw_core->driver = mlxsw_driver;
1885         mlxsw_core->bus = mlxsw_bus;
1886         mlxsw_core->bus_priv = bus_priv;
1887         mlxsw_core->bus_info = mlxsw_bus_info;
1888
1889         res = mlxsw_driver->res_query_enabled ? &mlxsw_core->res : NULL;
1890         err = mlxsw_bus->init(bus_priv, mlxsw_core, mlxsw_driver->profile, res);
1891         if (err)
1892                 goto err_bus_init;
1893
1894         if (mlxsw_driver->resources_register && !reload) {
1895                 err = mlxsw_driver->resources_register(mlxsw_core);
1896                 if (err)
1897                         goto err_register_resources;
1898         }
1899
1900         err = mlxsw_ports_init(mlxsw_core);
1901         if (err)
1902                 goto err_ports_init;
1903
1904         if (MLXSW_CORE_RES_VALID(mlxsw_core, MAX_LAG) &&
1905             MLXSW_CORE_RES_VALID(mlxsw_core, MAX_LAG_MEMBERS)) {
1906                 alloc_size = sizeof(u8) *
1907                         MLXSW_CORE_RES_GET(mlxsw_core, MAX_LAG) *
1908                         MLXSW_CORE_RES_GET(mlxsw_core, MAX_LAG_MEMBERS);
1909                 mlxsw_core->lag.mapping = kzalloc(alloc_size, GFP_KERNEL);
1910                 if (!mlxsw_core->lag.mapping) {
1911                         err = -ENOMEM;
1912                         goto err_alloc_lag_mapping;
1913                 }
1914         }
1915
1916         err = mlxsw_emad_init(mlxsw_core);
1917         if (err)
1918                 goto err_emad_init;
1919
1920         if (!reload) {
1921                 err = devlink_register(devlink, mlxsw_bus_info->dev);
1922                 if (err)
1923                         goto err_devlink_register;
1924         }
1925
1926         if (!reload) {
1927                 err = mlxsw_core_params_register(mlxsw_core);
1928                 if (err)
1929                         goto err_register_params;
1930         }
1931
1932         err = mlxsw_core_fw_rev_validate(mlxsw_core, mlxsw_bus_info, mlxsw_driver->fw_req_rev,
1933                                          mlxsw_driver->fw_filename);
1934         if (err)
1935                 goto err_fw_rev_validate;
1936
1937         err = mlxsw_core_health_init(mlxsw_core);
1938         if (err)
1939                 goto err_health_init;
1940
1941         if (mlxsw_driver->init) {
1942                 err = mlxsw_driver->init(mlxsw_core, mlxsw_bus_info, extack);
1943                 if (err)
1944                         goto err_driver_init;
1945         }
1946
1947         err = mlxsw_hwmon_init(mlxsw_core, mlxsw_bus_info, &mlxsw_core->hwmon);
1948         if (err)
1949                 goto err_hwmon_init;
1950
1951         err = mlxsw_thermal_init(mlxsw_core, mlxsw_bus_info,
1952                                  &mlxsw_core->thermal);
1953         if (err)
1954                 goto err_thermal_init;
1955
1956         err = mlxsw_env_init(mlxsw_core, &mlxsw_core->env);
1957         if (err)
1958                 goto err_env_init;
1959
1960         mlxsw_core->is_initialized = true;
1961         devlink_params_publish(devlink);
1962
1963         if (!reload)
1964                 devlink_reload_enable(devlink);
1965
1966         return 0;
1967
1968 err_env_init:
1969         mlxsw_thermal_fini(mlxsw_core->thermal);
1970 err_thermal_init:
1971         mlxsw_hwmon_fini(mlxsw_core->hwmon);
1972 err_hwmon_init:
1973         if (mlxsw_core->driver->fini)
1974                 mlxsw_core->driver->fini(mlxsw_core);
1975 err_driver_init:
1976         mlxsw_core_health_fini(mlxsw_core);
1977 err_health_init:
1978 err_fw_rev_validate:
1979         if (!reload)
1980                 mlxsw_core_params_unregister(mlxsw_core);
1981 err_register_params:
1982         if (!reload)
1983                 devlink_unregister(devlink);
1984 err_devlink_register:
1985         mlxsw_emad_fini(mlxsw_core);
1986 err_emad_init:
1987         kfree(mlxsw_core->lag.mapping);
1988 err_alloc_lag_mapping:
1989         mlxsw_ports_fini(mlxsw_core);
1990 err_ports_init:
1991         if (!reload)
1992                 devlink_resources_unregister(devlink, NULL);
1993 err_register_resources:
1994         mlxsw_bus->fini(bus_priv);
1995 err_bus_init:
1996         if (!reload)
1997                 devlink_free(devlink);
1998 err_devlink_alloc:
1999         return err;
2000 }
2001
2002 int mlxsw_core_bus_device_register(const struct mlxsw_bus_info *mlxsw_bus_info,
2003                                    const struct mlxsw_bus *mlxsw_bus,
2004                                    void *bus_priv, bool reload,
2005                                    struct devlink *devlink,
2006                                    struct netlink_ext_ack *extack)
2007 {
2008         bool called_again = false;
2009         int err;
2010
2011 again:
2012         err = __mlxsw_core_bus_device_register(mlxsw_bus_info, mlxsw_bus,
2013                                                bus_priv, reload,
2014                                                devlink, extack);
2015         /* -EAGAIN is returned in case the FW was updated. FW needs
2016          * a reset, so lets try to call __mlxsw_core_bus_device_register()
2017          * again.
2018          */
2019         if (err == -EAGAIN && !called_again) {
2020                 called_again = true;
2021                 goto again;
2022         }
2023
2024         return err;
2025 }
2026 EXPORT_SYMBOL(mlxsw_core_bus_device_register);
2027
2028 void mlxsw_core_bus_device_unregister(struct mlxsw_core *mlxsw_core,
2029                                       bool reload)
2030 {
2031         struct devlink *devlink = priv_to_devlink(mlxsw_core);
2032
2033         if (!reload)
2034                 devlink_reload_disable(devlink);
2035         if (devlink_is_reload_failed(devlink)) {
2036                 if (!reload)
2037                         /* Only the parts that were not de-initialized in the
2038                          * failed reload attempt need to be de-initialized.
2039                          */
2040                         goto reload_fail_deinit;
2041                 else
2042                         return;
2043         }
2044
2045         devlink_params_unpublish(devlink);
2046         mlxsw_core->is_initialized = false;
2047         mlxsw_env_fini(mlxsw_core->env);
2048         mlxsw_thermal_fini(mlxsw_core->thermal);
2049         mlxsw_hwmon_fini(mlxsw_core->hwmon);
2050         if (mlxsw_core->driver->fini)
2051                 mlxsw_core->driver->fini(mlxsw_core);
2052         mlxsw_core_health_fini(mlxsw_core);
2053         if (!reload)
2054                 mlxsw_core_params_unregister(mlxsw_core);
2055         if (!reload)
2056                 devlink_unregister(devlink);
2057         mlxsw_emad_fini(mlxsw_core);
2058         kfree(mlxsw_core->lag.mapping);
2059         mlxsw_ports_fini(mlxsw_core);
2060         if (!reload)
2061                 devlink_resources_unregister(devlink, NULL);
2062         mlxsw_core->bus->fini(mlxsw_core->bus_priv);
2063         if (!reload)
2064                 devlink_free(devlink);
2065
2066         return;
2067
2068 reload_fail_deinit:
2069         mlxsw_core_params_unregister(mlxsw_core);
2070         devlink_unregister(devlink);
2071         devlink_resources_unregister(devlink, NULL);
2072         devlink_free(devlink);
2073 }
2074 EXPORT_SYMBOL(mlxsw_core_bus_device_unregister);
2075
2076 bool mlxsw_core_skb_transmit_busy(struct mlxsw_core *mlxsw_core,
2077                                   const struct mlxsw_tx_info *tx_info)
2078 {
2079         return mlxsw_core->bus->skb_transmit_busy(mlxsw_core->bus_priv,
2080                                                   tx_info);
2081 }
2082 EXPORT_SYMBOL(mlxsw_core_skb_transmit_busy);
2083
2084 int mlxsw_core_skb_transmit(struct mlxsw_core *mlxsw_core, struct sk_buff *skb,
2085                             const struct mlxsw_tx_info *tx_info)
2086 {
2087         return mlxsw_core->bus->skb_transmit(mlxsw_core->bus_priv, skb,
2088                                              tx_info);
2089 }
2090 EXPORT_SYMBOL(mlxsw_core_skb_transmit);
2091
2092 void mlxsw_core_ptp_transmitted(struct mlxsw_core *mlxsw_core,
2093                                 struct sk_buff *skb, u8 local_port)
2094 {
2095         if (mlxsw_core->driver->ptp_transmitted)
2096                 mlxsw_core->driver->ptp_transmitted(mlxsw_core, skb,
2097                                                     local_port);
2098 }
2099 EXPORT_SYMBOL(mlxsw_core_ptp_transmitted);
2100
2101 static bool __is_rx_listener_equal(const struct mlxsw_rx_listener *rxl_a,
2102                                    const struct mlxsw_rx_listener *rxl_b)
2103 {
2104         return (rxl_a->func == rxl_b->func &&
2105                 rxl_a->local_port == rxl_b->local_port &&
2106                 rxl_a->trap_id == rxl_b->trap_id &&
2107                 rxl_a->mirror_reason == rxl_b->mirror_reason);
2108 }
2109
2110 static struct mlxsw_rx_listener_item *
2111 __find_rx_listener_item(struct mlxsw_core *mlxsw_core,
2112                         const struct mlxsw_rx_listener *rxl)
2113 {
2114         struct mlxsw_rx_listener_item *rxl_item;
2115
2116         list_for_each_entry(rxl_item, &mlxsw_core->rx_listener_list, list) {
2117                 if (__is_rx_listener_equal(&rxl_item->rxl, rxl))
2118                         return rxl_item;
2119         }
2120         return NULL;
2121 }
2122
2123 int mlxsw_core_rx_listener_register(struct mlxsw_core *mlxsw_core,
2124                                     const struct mlxsw_rx_listener *rxl,
2125                                     void *priv, bool enabled)
2126 {
2127         struct mlxsw_rx_listener_item *rxl_item;
2128
2129         rxl_item = __find_rx_listener_item(mlxsw_core, rxl);
2130         if (rxl_item)
2131                 return -EEXIST;
2132         rxl_item = kmalloc(sizeof(*rxl_item), GFP_KERNEL);
2133         if (!rxl_item)
2134                 return -ENOMEM;
2135         rxl_item->rxl = *rxl;
2136         rxl_item->priv = priv;
2137         rxl_item->enabled = enabled;
2138
2139         list_add_rcu(&rxl_item->list, &mlxsw_core->rx_listener_list);
2140         return 0;
2141 }
2142 EXPORT_SYMBOL(mlxsw_core_rx_listener_register);
2143
2144 void mlxsw_core_rx_listener_unregister(struct mlxsw_core *mlxsw_core,
2145                                        const struct mlxsw_rx_listener *rxl)
2146 {
2147         struct mlxsw_rx_listener_item *rxl_item;
2148
2149         rxl_item = __find_rx_listener_item(mlxsw_core, rxl);
2150         if (!rxl_item)
2151                 return;
2152         list_del_rcu(&rxl_item->list);
2153         synchronize_rcu();
2154         kfree(rxl_item);
2155 }
2156 EXPORT_SYMBOL(mlxsw_core_rx_listener_unregister);
2157
2158 static void
2159 mlxsw_core_rx_listener_state_set(struct mlxsw_core *mlxsw_core,
2160                                  const struct mlxsw_rx_listener *rxl,
2161                                  bool enabled)
2162 {
2163         struct mlxsw_rx_listener_item *rxl_item;
2164
2165         rxl_item = __find_rx_listener_item(mlxsw_core, rxl);
2166         if (WARN_ON(!rxl_item))
2167                 return;
2168         rxl_item->enabled = enabled;
2169 }
2170
2171 static void mlxsw_core_event_listener_func(struct sk_buff *skb, u8 local_port,
2172                                            void *priv)
2173 {
2174         struct mlxsw_event_listener_item *event_listener_item = priv;
2175         struct mlxsw_core *mlxsw_core;
2176         struct mlxsw_reg_info reg;
2177         char *payload;
2178         char *reg_tlv;
2179         char *op_tlv;
2180
2181         mlxsw_core = event_listener_item->mlxsw_core;
2182         trace_devlink_hwmsg(priv_to_devlink(mlxsw_core), true, 0,
2183                             skb->data, skb->len);
2184
2185         mlxsw_emad_tlv_parse(skb);
2186         op_tlv = mlxsw_emad_op_tlv(skb);
2187         reg_tlv = mlxsw_emad_reg_tlv(skb);
2188
2189         reg.id = mlxsw_emad_op_tlv_register_id_get(op_tlv);
2190         reg.len = (mlxsw_emad_reg_tlv_len_get(reg_tlv) - 1) * sizeof(u32);
2191         payload = mlxsw_emad_reg_payload(reg_tlv);
2192         event_listener_item->el.func(&reg, payload, event_listener_item->priv);
2193         dev_kfree_skb(skb);
2194 }
2195
2196 static bool __is_event_listener_equal(const struct mlxsw_event_listener *el_a,
2197                                       const struct mlxsw_event_listener *el_b)
2198 {
2199         return (el_a->func == el_b->func &&
2200                 el_a->trap_id == el_b->trap_id);
2201 }
2202
2203 static struct mlxsw_event_listener_item *
2204 __find_event_listener_item(struct mlxsw_core *mlxsw_core,
2205                            const struct mlxsw_event_listener *el)
2206 {
2207         struct mlxsw_event_listener_item *el_item;
2208
2209         list_for_each_entry(el_item, &mlxsw_core->event_listener_list, list) {
2210                 if (__is_event_listener_equal(&el_item->el, el))
2211                         return el_item;
2212         }
2213         return NULL;
2214 }
2215
2216 int mlxsw_core_event_listener_register(struct mlxsw_core *mlxsw_core,
2217                                        const struct mlxsw_event_listener *el,
2218                                        void *priv)
2219 {
2220         int err;
2221         struct mlxsw_event_listener_item *el_item;
2222         const struct mlxsw_rx_listener rxl = {
2223                 .func = mlxsw_core_event_listener_func,
2224                 .local_port = MLXSW_PORT_DONT_CARE,
2225                 .trap_id = el->trap_id,
2226         };
2227
2228         el_item = __find_event_listener_item(mlxsw_core, el);
2229         if (el_item)
2230                 return -EEXIST;
2231         el_item = kmalloc(sizeof(*el_item), GFP_KERNEL);
2232         if (!el_item)
2233                 return -ENOMEM;
2234         el_item->mlxsw_core = mlxsw_core;
2235         el_item->el = *el;
2236         el_item->priv = priv;
2237
2238         err = mlxsw_core_rx_listener_register(mlxsw_core, &rxl, el_item, true);
2239         if (err)
2240                 goto err_rx_listener_register;
2241
2242         /* No reason to save item if we did not manage to register an RX
2243          * listener for it.
2244          */
2245         list_add_rcu(&el_item->list, &mlxsw_core->event_listener_list);
2246
2247         return 0;
2248
2249 err_rx_listener_register:
2250         kfree(el_item);
2251         return err;
2252 }
2253 EXPORT_SYMBOL(mlxsw_core_event_listener_register);
2254
2255 void mlxsw_core_event_listener_unregister(struct mlxsw_core *mlxsw_core,
2256                                           const struct mlxsw_event_listener *el)
2257 {
2258         struct mlxsw_event_listener_item *el_item;
2259         const struct mlxsw_rx_listener rxl = {
2260                 .func = mlxsw_core_event_listener_func,
2261                 .local_port = MLXSW_PORT_DONT_CARE,
2262                 .trap_id = el->trap_id,
2263         };
2264
2265         el_item = __find_event_listener_item(mlxsw_core, el);
2266         if (!el_item)
2267                 return;
2268         mlxsw_core_rx_listener_unregister(mlxsw_core, &rxl);
2269         list_del(&el_item->list);
2270         kfree(el_item);
2271 }
2272 EXPORT_SYMBOL(mlxsw_core_event_listener_unregister);
2273
2274 static int mlxsw_core_listener_register(struct mlxsw_core *mlxsw_core,
2275                                         const struct mlxsw_listener *listener,
2276                                         void *priv, bool enabled)
2277 {
2278         if (listener->is_event) {
2279                 WARN_ON(!enabled);
2280                 return mlxsw_core_event_listener_register(mlxsw_core,
2281                                                 &listener->event_listener,
2282                                                 priv);
2283         } else {
2284                 return mlxsw_core_rx_listener_register(mlxsw_core,
2285                                                 &listener->rx_listener,
2286                                                 priv, enabled);
2287         }
2288 }
2289
2290 static void mlxsw_core_listener_unregister(struct mlxsw_core *mlxsw_core,
2291                                       const struct mlxsw_listener *listener,
2292                                       void *priv)
2293 {
2294         if (listener->is_event)
2295                 mlxsw_core_event_listener_unregister(mlxsw_core,
2296                                                      &listener->event_listener);
2297         else
2298                 mlxsw_core_rx_listener_unregister(mlxsw_core,
2299                                                   &listener->rx_listener);
2300 }
2301
2302 int mlxsw_core_trap_register(struct mlxsw_core *mlxsw_core,
2303                              const struct mlxsw_listener *listener, void *priv)
2304 {
2305         enum mlxsw_reg_htgt_trap_group trap_group;
2306         enum mlxsw_reg_hpkt_action action;
2307         char hpkt_pl[MLXSW_REG_HPKT_LEN];
2308         int err;
2309
2310         err = mlxsw_core_listener_register(mlxsw_core, listener, priv,
2311                                            listener->enabled_on_register);
2312         if (err)
2313                 return err;
2314
2315         action = listener->enabled_on_register ? listener->en_action :
2316                                                  listener->dis_action;
2317         trap_group = listener->enabled_on_register ? listener->en_trap_group :
2318                                                      listener->dis_trap_group;
2319         mlxsw_reg_hpkt_pack(hpkt_pl, action, listener->trap_id,
2320                             trap_group, listener->is_ctrl);
2321         err = mlxsw_reg_write(mlxsw_core,  MLXSW_REG(hpkt), hpkt_pl);
2322         if (err)
2323                 goto err_trap_set;
2324
2325         return 0;
2326
2327 err_trap_set:
2328         mlxsw_core_listener_unregister(mlxsw_core, listener, priv);
2329         return err;
2330 }
2331 EXPORT_SYMBOL(mlxsw_core_trap_register);
2332
2333 void mlxsw_core_trap_unregister(struct mlxsw_core *mlxsw_core,
2334                                 const struct mlxsw_listener *listener,
2335                                 void *priv)
2336 {
2337         char hpkt_pl[MLXSW_REG_HPKT_LEN];
2338
2339         if (!listener->is_event) {
2340                 mlxsw_reg_hpkt_pack(hpkt_pl, listener->dis_action,
2341                                     listener->trap_id, listener->dis_trap_group,
2342                                     listener->is_ctrl);
2343                 mlxsw_reg_write(mlxsw_core, MLXSW_REG(hpkt), hpkt_pl);
2344         }
2345
2346         mlxsw_core_listener_unregister(mlxsw_core, listener, priv);
2347 }
2348 EXPORT_SYMBOL(mlxsw_core_trap_unregister);
2349
2350 int mlxsw_core_trap_state_set(struct mlxsw_core *mlxsw_core,
2351                               const struct mlxsw_listener *listener,
2352                               bool enabled)
2353 {
2354         enum mlxsw_reg_htgt_trap_group trap_group;
2355         enum mlxsw_reg_hpkt_action action;
2356         char hpkt_pl[MLXSW_REG_HPKT_LEN];
2357         int err;
2358
2359         /* Not supported for event listener */
2360         if (WARN_ON(listener->is_event))
2361                 return -EINVAL;
2362
2363         action = enabled ? listener->en_action : listener->dis_action;
2364         trap_group = enabled ? listener->en_trap_group :
2365                                listener->dis_trap_group;
2366         mlxsw_reg_hpkt_pack(hpkt_pl, action, listener->trap_id,
2367                             trap_group, listener->is_ctrl);
2368         err = mlxsw_reg_write(mlxsw_core, MLXSW_REG(hpkt), hpkt_pl);
2369         if (err)
2370                 return err;
2371
2372         mlxsw_core_rx_listener_state_set(mlxsw_core, &listener->rx_listener,
2373                                          enabled);
2374         return 0;
2375 }
2376 EXPORT_SYMBOL(mlxsw_core_trap_state_set);
2377
2378 static u64 mlxsw_core_tid_get(struct mlxsw_core *mlxsw_core)
2379 {
2380         return atomic64_inc_return(&mlxsw_core->emad.tid);
2381 }
2382
2383 static int mlxsw_core_reg_access_emad(struct mlxsw_core *mlxsw_core,
2384                                       const struct mlxsw_reg_info *reg,
2385                                       char *payload,
2386                                       enum mlxsw_core_reg_access_type type,
2387                                       struct list_head *bulk_list,
2388                                       mlxsw_reg_trans_cb_t *cb,
2389                                       unsigned long cb_priv)
2390 {
2391         u64 tid = mlxsw_core_tid_get(mlxsw_core);
2392         struct mlxsw_reg_trans *trans;
2393         int err;
2394
2395         trans = kzalloc(sizeof(*trans), GFP_KERNEL);
2396         if (!trans)
2397                 return -ENOMEM;
2398
2399         err = mlxsw_emad_reg_access(mlxsw_core, reg, payload, type, trans,
2400                                     bulk_list, cb, cb_priv, tid);
2401         if (err) {
2402                 kfree_rcu(trans, rcu);
2403                 return err;
2404         }
2405         return 0;
2406 }
2407
2408 int mlxsw_reg_trans_query(struct mlxsw_core *mlxsw_core,
2409                           const struct mlxsw_reg_info *reg, char *payload,
2410                           struct list_head *bulk_list,
2411                           mlxsw_reg_trans_cb_t *cb, unsigned long cb_priv)
2412 {
2413         return mlxsw_core_reg_access_emad(mlxsw_core, reg, payload,
2414                                           MLXSW_CORE_REG_ACCESS_TYPE_QUERY,
2415                                           bulk_list, cb, cb_priv);
2416 }
2417 EXPORT_SYMBOL(mlxsw_reg_trans_query);
2418
2419 int mlxsw_reg_trans_write(struct mlxsw_core *mlxsw_core,
2420                           const struct mlxsw_reg_info *reg, char *payload,
2421                           struct list_head *bulk_list,
2422                           mlxsw_reg_trans_cb_t *cb, unsigned long cb_priv)
2423 {
2424         return mlxsw_core_reg_access_emad(mlxsw_core, reg, payload,
2425                                           MLXSW_CORE_REG_ACCESS_TYPE_WRITE,
2426                                           bulk_list, cb, cb_priv);
2427 }
2428 EXPORT_SYMBOL(mlxsw_reg_trans_write);
2429
2430 #define MLXSW_REG_TRANS_ERR_STRING_SIZE 256
2431
2432 static int mlxsw_reg_trans_wait(struct mlxsw_reg_trans *trans)
2433 {
2434         char err_string[MLXSW_REG_TRANS_ERR_STRING_SIZE];
2435         struct mlxsw_core *mlxsw_core = trans->core;
2436         int err;
2437
2438         wait_for_completion(&trans->completion);
2439         cancel_delayed_work_sync(&trans->timeout_dw);
2440         err = trans->err;
2441
2442         if (trans->retries)
2443                 dev_warn(mlxsw_core->bus_info->dev, "EMAD retries (%d/%d) (tid=%llx)\n",
2444                          trans->retries, MLXSW_EMAD_MAX_RETRY, trans->tid);
2445         if (err) {
2446                 dev_err(mlxsw_core->bus_info->dev, "EMAD reg access failed (tid=%llx,reg_id=%x(%s),type=%s,status=%x(%s))\n",
2447                         trans->tid, trans->reg->id,
2448                         mlxsw_reg_id_str(trans->reg->id),
2449                         mlxsw_core_reg_access_type_str(trans->type),
2450                         trans->emad_status,
2451                         mlxsw_emad_op_tlv_status_str(trans->emad_status));
2452
2453                 snprintf(err_string, MLXSW_REG_TRANS_ERR_STRING_SIZE,
2454                          "(tid=%llx,reg_id=%x(%s)) %s (%s)\n", trans->tid,
2455                          trans->reg->id, mlxsw_reg_id_str(trans->reg->id),
2456                          mlxsw_emad_op_tlv_status_str(trans->emad_status),
2457                          trans->emad_err_string ? trans->emad_err_string : "");
2458
2459                 trace_devlink_hwerr(priv_to_devlink(mlxsw_core),
2460                                     trans->emad_status, err_string);
2461
2462                 kfree(trans->emad_err_string);
2463         }
2464
2465         list_del(&trans->bulk_list);
2466         kfree_rcu(trans, rcu);
2467         return err;
2468 }
2469
2470 int mlxsw_reg_trans_bulk_wait(struct list_head *bulk_list)
2471 {
2472         struct mlxsw_reg_trans *trans;
2473         struct mlxsw_reg_trans *tmp;
2474         int sum_err = 0;
2475         int err;
2476
2477         list_for_each_entry_safe(trans, tmp, bulk_list, bulk_list) {
2478                 err = mlxsw_reg_trans_wait(trans);
2479                 if (err && sum_err == 0)
2480                         sum_err = err; /* first error to be returned */
2481         }
2482         return sum_err;
2483 }
2484 EXPORT_SYMBOL(mlxsw_reg_trans_bulk_wait);
2485
2486 static int mlxsw_core_reg_access_cmd(struct mlxsw_core *mlxsw_core,
2487                                      const struct mlxsw_reg_info *reg,
2488                                      char *payload,
2489                                      enum mlxsw_core_reg_access_type type)
2490 {
2491         enum mlxsw_emad_op_tlv_status status;
2492         int err, n_retry;
2493         bool reset_ok;
2494         char *in_mbox, *out_mbox, *tmp;
2495
2496         dev_dbg(mlxsw_core->bus_info->dev, "Reg cmd access (reg_id=%x(%s),type=%s)\n",
2497                 reg->id, mlxsw_reg_id_str(reg->id),
2498                 mlxsw_core_reg_access_type_str(type));
2499
2500         in_mbox = mlxsw_cmd_mbox_alloc();
2501         if (!in_mbox)
2502                 return -ENOMEM;
2503
2504         out_mbox = mlxsw_cmd_mbox_alloc();
2505         if (!out_mbox) {
2506                 err = -ENOMEM;
2507                 goto free_in_mbox;
2508         }
2509
2510         mlxsw_emad_pack_op_tlv(in_mbox, reg, type,
2511                                mlxsw_core_tid_get(mlxsw_core));
2512         tmp = in_mbox + MLXSW_EMAD_OP_TLV_LEN * sizeof(u32);
2513         mlxsw_emad_pack_reg_tlv(tmp, reg, payload);
2514
2515         /* There is a special treatment needed for MRSR (reset) register.
2516          * The command interface will return error after the command
2517          * is executed, so tell the lower layer to expect it
2518          * and cope accordingly.
2519          */
2520         reset_ok = reg->id == MLXSW_REG_MRSR_ID;
2521
2522         n_retry = 0;
2523 retry:
2524         err = mlxsw_cmd_access_reg(mlxsw_core, reset_ok, in_mbox, out_mbox);
2525         if (!err) {
2526                 err = mlxsw_emad_process_status(out_mbox, &status);
2527                 if (err) {
2528                         if (err == -EAGAIN && n_retry++ < MLXSW_EMAD_MAX_RETRY)
2529                                 goto retry;
2530                         dev_err(mlxsw_core->bus_info->dev, "Reg cmd access status failed (status=%x(%s))\n",
2531                                 status, mlxsw_emad_op_tlv_status_str(status));
2532                 }
2533         }
2534
2535         if (!err)
2536                 memcpy(payload, mlxsw_emad_reg_payload_cmd(out_mbox),
2537                        reg->len);
2538
2539         mlxsw_cmd_mbox_free(out_mbox);
2540 free_in_mbox:
2541         mlxsw_cmd_mbox_free(in_mbox);
2542         if (err)
2543                 dev_err(mlxsw_core->bus_info->dev, "Reg cmd access failed (reg_id=%x(%s),type=%s)\n",
2544                         reg->id, mlxsw_reg_id_str(reg->id),
2545                         mlxsw_core_reg_access_type_str(type));
2546         return err;
2547 }
2548
2549 static void mlxsw_core_reg_access_cb(struct mlxsw_core *mlxsw_core,
2550                                      char *payload, size_t payload_len,
2551                                      unsigned long cb_priv)
2552 {
2553         char *orig_payload = (char *) cb_priv;
2554
2555         memcpy(orig_payload, payload, payload_len);
2556 }
2557
2558 static int mlxsw_core_reg_access(struct mlxsw_core *mlxsw_core,
2559                                  const struct mlxsw_reg_info *reg,
2560                                  char *payload,
2561                                  enum mlxsw_core_reg_access_type type)
2562 {
2563         LIST_HEAD(bulk_list);
2564         int err;
2565
2566         /* During initialization EMAD interface is not available to us,
2567          * so we default to command interface. We switch to EMAD interface
2568          * after setting the appropriate traps.
2569          */
2570         if (!mlxsw_core->emad.use_emad)
2571                 return mlxsw_core_reg_access_cmd(mlxsw_core, reg,
2572                                                  payload, type);
2573
2574         err = mlxsw_core_reg_access_emad(mlxsw_core, reg,
2575                                          payload, type, &bulk_list,
2576                                          mlxsw_core_reg_access_cb,
2577                                          (unsigned long) payload);
2578         if (err)
2579                 return err;
2580         return mlxsw_reg_trans_bulk_wait(&bulk_list);
2581 }
2582
2583 int mlxsw_reg_query(struct mlxsw_core *mlxsw_core,
2584                     const struct mlxsw_reg_info *reg, char *payload)
2585 {
2586         return mlxsw_core_reg_access(mlxsw_core, reg, payload,
2587                                      MLXSW_CORE_REG_ACCESS_TYPE_QUERY);
2588 }
2589 EXPORT_SYMBOL(mlxsw_reg_query);
2590
2591 int mlxsw_reg_write(struct mlxsw_core *mlxsw_core,
2592                     const struct mlxsw_reg_info *reg, char *payload)
2593 {
2594         return mlxsw_core_reg_access(mlxsw_core, reg, payload,
2595                                      MLXSW_CORE_REG_ACCESS_TYPE_WRITE);
2596 }
2597 EXPORT_SYMBOL(mlxsw_reg_write);
2598
2599 void mlxsw_core_skb_receive(struct mlxsw_core *mlxsw_core, struct sk_buff *skb,
2600                             struct mlxsw_rx_info *rx_info)
2601 {
2602         struct mlxsw_rx_listener_item *rxl_item;
2603         const struct mlxsw_rx_listener *rxl;
2604         u8 local_port;
2605         bool found = false;
2606
2607         if (rx_info->is_lag) {
2608                 dev_dbg_ratelimited(mlxsw_core->bus_info->dev, "%s: lag_id = %d, lag_port_index = 0x%x\n",
2609                                     __func__, rx_info->u.lag_id,
2610                                     rx_info->trap_id);
2611                 /* Upper layer does not care if the skb came from LAG or not,
2612                  * so just get the local_port for the lag port and push it up.
2613                  */
2614                 local_port = mlxsw_core_lag_mapping_get(mlxsw_core,
2615                                                         rx_info->u.lag_id,
2616                                                         rx_info->lag_port_index);
2617         } else {
2618                 local_port = rx_info->u.sys_port;
2619         }
2620
2621         dev_dbg_ratelimited(mlxsw_core->bus_info->dev, "%s: local_port = %d, trap_id = 0x%x\n",
2622                             __func__, local_port, rx_info->trap_id);
2623
2624         if ((rx_info->trap_id >= MLXSW_TRAP_ID_MAX) ||
2625             (local_port >= mlxsw_core->max_ports))
2626                 goto drop;
2627
2628         rcu_read_lock();
2629         list_for_each_entry_rcu(rxl_item, &mlxsw_core->rx_listener_list, list) {
2630                 rxl = &rxl_item->rxl;
2631                 if ((rxl->local_port == MLXSW_PORT_DONT_CARE ||
2632                      rxl->local_port == local_port) &&
2633                     rxl->trap_id == rx_info->trap_id &&
2634                     rxl->mirror_reason == rx_info->mirror_reason) {
2635                         if (rxl_item->enabled)
2636                                 found = true;
2637                         break;
2638                 }
2639         }
2640         if (!found) {
2641                 rcu_read_unlock();
2642                 goto drop;
2643         }
2644
2645         rxl->func(skb, local_port, rxl_item->priv);
2646         rcu_read_unlock();
2647         return;
2648
2649 drop:
2650         dev_kfree_skb(skb);
2651 }
2652 EXPORT_SYMBOL(mlxsw_core_skb_receive);
2653
2654 static int mlxsw_core_lag_mapping_index(struct mlxsw_core *mlxsw_core,
2655                                         u16 lag_id, u8 port_index)
2656 {
2657         return MLXSW_CORE_RES_GET(mlxsw_core, MAX_LAG_MEMBERS) * lag_id +
2658                port_index;
2659 }
2660
2661 void mlxsw_core_lag_mapping_set(struct mlxsw_core *mlxsw_core,
2662                                 u16 lag_id, u8 port_index, u8 local_port)
2663 {
2664         int index = mlxsw_core_lag_mapping_index(mlxsw_core,
2665                                                  lag_id, port_index);
2666
2667         mlxsw_core->lag.mapping[index] = local_port;
2668 }
2669 EXPORT_SYMBOL(mlxsw_core_lag_mapping_set);
2670
2671 u8 mlxsw_core_lag_mapping_get(struct mlxsw_core *mlxsw_core,
2672                               u16 lag_id, u8 port_index)
2673 {
2674         int index = mlxsw_core_lag_mapping_index(mlxsw_core,
2675                                                  lag_id, port_index);
2676
2677         return mlxsw_core->lag.mapping[index];
2678 }
2679 EXPORT_SYMBOL(mlxsw_core_lag_mapping_get);
2680
2681 void mlxsw_core_lag_mapping_clear(struct mlxsw_core *mlxsw_core,
2682                                   u16 lag_id, u8 local_port)
2683 {
2684         int i;
2685
2686         for (i = 0; i < MLXSW_CORE_RES_GET(mlxsw_core, MAX_LAG_MEMBERS); i++) {
2687                 int index = mlxsw_core_lag_mapping_index(mlxsw_core,
2688                                                          lag_id, i);
2689
2690                 if (mlxsw_core->lag.mapping[index] == local_port)
2691                         mlxsw_core->lag.mapping[index] = 0;
2692         }
2693 }
2694 EXPORT_SYMBOL(mlxsw_core_lag_mapping_clear);
2695
2696 bool mlxsw_core_res_valid(struct mlxsw_core *mlxsw_core,
2697                           enum mlxsw_res_id res_id)
2698 {
2699         return mlxsw_res_valid(&mlxsw_core->res, res_id);
2700 }
2701 EXPORT_SYMBOL(mlxsw_core_res_valid);
2702
2703 u64 mlxsw_core_res_get(struct mlxsw_core *mlxsw_core,
2704                        enum mlxsw_res_id res_id)
2705 {
2706         return mlxsw_res_get(&mlxsw_core->res, res_id);
2707 }
2708 EXPORT_SYMBOL(mlxsw_core_res_get);
2709
2710 static int __mlxsw_core_port_init(struct mlxsw_core *mlxsw_core, u8 local_port,
2711                                   enum devlink_port_flavour flavour,
2712                                   u32 port_number, bool split,
2713                                   u32 split_port_subnumber,
2714                                   bool splittable, u32 lanes,
2715                                   const unsigned char *switch_id,
2716                                   unsigned char switch_id_len)
2717 {
2718         struct devlink *devlink = priv_to_devlink(mlxsw_core);
2719         struct mlxsw_core_port *mlxsw_core_port =
2720                                         &mlxsw_core->ports[local_port];
2721         struct devlink_port *devlink_port = &mlxsw_core_port->devlink_port;
2722         struct devlink_port_attrs attrs = {};
2723         int err;
2724
2725         attrs.split = split;
2726         attrs.lanes = lanes;
2727         attrs.splittable = splittable;
2728         attrs.flavour = flavour;
2729         attrs.phys.port_number = port_number;
2730         attrs.phys.split_subport_number = split_port_subnumber;
2731         memcpy(attrs.switch_id.id, switch_id, switch_id_len);
2732         attrs.switch_id.id_len = switch_id_len;
2733         mlxsw_core_port->local_port = local_port;
2734         devlink_port_attrs_set(devlink_port, &attrs);
2735         err = devlink_port_register(devlink, devlink_port, local_port);
2736         if (err)
2737                 memset(mlxsw_core_port, 0, sizeof(*mlxsw_core_port));
2738         return err;
2739 }
2740
2741 static void __mlxsw_core_port_fini(struct mlxsw_core *mlxsw_core, u8 local_port)
2742 {
2743         struct mlxsw_core_port *mlxsw_core_port =
2744                                         &mlxsw_core->ports[local_port];
2745         struct devlink_port *devlink_port = &mlxsw_core_port->devlink_port;
2746
2747         devlink_port_unregister(devlink_port);
2748         memset(mlxsw_core_port, 0, sizeof(*mlxsw_core_port));
2749 }
2750
2751 int mlxsw_core_port_init(struct mlxsw_core *mlxsw_core, u8 local_port,
2752                          u32 port_number, bool split,
2753                          u32 split_port_subnumber,
2754                          bool splittable, u32 lanes,
2755                          const unsigned char *switch_id,
2756                          unsigned char switch_id_len)
2757 {
2758         return __mlxsw_core_port_init(mlxsw_core, local_port,
2759                                       DEVLINK_PORT_FLAVOUR_PHYSICAL,
2760                                       port_number, split, split_port_subnumber,
2761                                       splittable, lanes,
2762                                       switch_id, switch_id_len);
2763 }
2764 EXPORT_SYMBOL(mlxsw_core_port_init);
2765
2766 void mlxsw_core_port_fini(struct mlxsw_core *mlxsw_core, u8 local_port)
2767 {
2768         __mlxsw_core_port_fini(mlxsw_core, local_port);
2769 }
2770 EXPORT_SYMBOL(mlxsw_core_port_fini);
2771
2772 int mlxsw_core_cpu_port_init(struct mlxsw_core *mlxsw_core,
2773                              void *port_driver_priv,
2774                              const unsigned char *switch_id,
2775                              unsigned char switch_id_len)
2776 {
2777         struct mlxsw_core_port *mlxsw_core_port =
2778                                 &mlxsw_core->ports[MLXSW_PORT_CPU_PORT];
2779         int err;
2780
2781         err = __mlxsw_core_port_init(mlxsw_core, MLXSW_PORT_CPU_PORT,
2782                                      DEVLINK_PORT_FLAVOUR_CPU,
2783                                      0, false, 0, false, 0,
2784                                      switch_id, switch_id_len);
2785         if (err)
2786                 return err;
2787
2788         mlxsw_core_port->port_driver_priv = port_driver_priv;
2789         return 0;
2790 }
2791 EXPORT_SYMBOL(mlxsw_core_cpu_port_init);
2792
2793 void mlxsw_core_cpu_port_fini(struct mlxsw_core *mlxsw_core)
2794 {
2795         __mlxsw_core_port_fini(mlxsw_core, MLXSW_PORT_CPU_PORT);
2796 }
2797 EXPORT_SYMBOL(mlxsw_core_cpu_port_fini);
2798
2799 void mlxsw_core_port_eth_set(struct mlxsw_core *mlxsw_core, u8 local_port,
2800                              void *port_driver_priv, struct net_device *dev)
2801 {
2802         struct mlxsw_core_port *mlxsw_core_port =
2803                                         &mlxsw_core->ports[local_port];
2804         struct devlink_port *devlink_port = &mlxsw_core_port->devlink_port;
2805
2806         mlxsw_core_port->port_driver_priv = port_driver_priv;
2807         devlink_port_type_eth_set(devlink_port, dev);
2808 }
2809 EXPORT_SYMBOL(mlxsw_core_port_eth_set);
2810
2811 void mlxsw_core_port_ib_set(struct mlxsw_core *mlxsw_core, u8 local_port,
2812                             void *port_driver_priv)
2813 {
2814         struct mlxsw_core_port *mlxsw_core_port =
2815                                         &mlxsw_core->ports[local_port];
2816         struct devlink_port *devlink_port = &mlxsw_core_port->devlink_port;
2817
2818         mlxsw_core_port->port_driver_priv = port_driver_priv;
2819         devlink_port_type_ib_set(devlink_port, NULL);
2820 }
2821 EXPORT_SYMBOL(mlxsw_core_port_ib_set);
2822
2823 void mlxsw_core_port_clear(struct mlxsw_core *mlxsw_core, u8 local_port,
2824                            void *port_driver_priv)
2825 {
2826         struct mlxsw_core_port *mlxsw_core_port =
2827                                         &mlxsw_core->ports[local_port];
2828         struct devlink_port *devlink_port = &mlxsw_core_port->devlink_port;
2829
2830         mlxsw_core_port->port_driver_priv = port_driver_priv;
2831         devlink_port_type_clear(devlink_port);
2832 }
2833 EXPORT_SYMBOL(mlxsw_core_port_clear);
2834
2835 enum devlink_port_type mlxsw_core_port_type_get(struct mlxsw_core *mlxsw_core,
2836                                                 u8 local_port)
2837 {
2838         struct mlxsw_core_port *mlxsw_core_port =
2839                                         &mlxsw_core->ports[local_port];
2840         struct devlink_port *devlink_port = &mlxsw_core_port->devlink_port;
2841
2842         return devlink_port->type;
2843 }
2844 EXPORT_SYMBOL(mlxsw_core_port_type_get);
2845
2846
2847 struct devlink_port *
2848 mlxsw_core_port_devlink_port_get(struct mlxsw_core *mlxsw_core,
2849                                  u8 local_port)
2850 {
2851         struct mlxsw_core_port *mlxsw_core_port =
2852                                         &mlxsw_core->ports[local_port];
2853         struct devlink_port *devlink_port = &mlxsw_core_port->devlink_port;
2854
2855         return devlink_port;
2856 }
2857 EXPORT_SYMBOL(mlxsw_core_port_devlink_port_get);
2858
2859 bool mlxsw_core_port_is_xm(const struct mlxsw_core *mlxsw_core, u8 local_port)
2860 {
2861         const struct mlxsw_bus_info *bus_info = mlxsw_core->bus_info;
2862         int i;
2863
2864         for (i = 0; i < bus_info->xm_local_ports_count; i++)
2865                 if (bus_info->xm_local_ports[i] == local_port)
2866                         return true;
2867         return false;
2868 }
2869 EXPORT_SYMBOL(mlxsw_core_port_is_xm);
2870
2871 struct mlxsw_env *mlxsw_core_env(const struct mlxsw_core *mlxsw_core)
2872 {
2873         return mlxsw_core->env;
2874 }
2875
2876 bool mlxsw_core_is_initialized(const struct mlxsw_core *mlxsw_core)
2877 {
2878         return mlxsw_core->is_initialized;
2879 }
2880
2881 int mlxsw_core_module_max_width(struct mlxsw_core *mlxsw_core, u8 module)
2882 {
2883         enum mlxsw_reg_pmtm_module_type module_type;
2884         char pmtm_pl[MLXSW_REG_PMTM_LEN];
2885         int err;
2886
2887         mlxsw_reg_pmtm_pack(pmtm_pl, module);
2888         err = mlxsw_reg_query(mlxsw_core, MLXSW_REG(pmtm), pmtm_pl);
2889         if (err)
2890                 return err;
2891         mlxsw_reg_pmtm_unpack(pmtm_pl, &module_type);
2892
2893         /* Here we need to get the module width according to the module type. */
2894
2895         switch (module_type) {
2896         case MLXSW_REG_PMTM_MODULE_TYPE_C2C8X:
2897         case MLXSW_REG_PMTM_MODULE_TYPE_QSFP_DD:
2898         case MLXSW_REG_PMTM_MODULE_TYPE_OSFP:
2899                 return 8;
2900         case MLXSW_REG_PMTM_MODULE_TYPE_C2C4X:
2901         case MLXSW_REG_PMTM_MODULE_TYPE_BP_4X:
2902         case MLXSW_REG_PMTM_MODULE_TYPE_QSFP:
2903                 return 4;
2904         case MLXSW_REG_PMTM_MODULE_TYPE_C2C2X:
2905         case MLXSW_REG_PMTM_MODULE_TYPE_BP_2X:
2906         case MLXSW_REG_PMTM_MODULE_TYPE_SFP_DD:
2907         case MLXSW_REG_PMTM_MODULE_TYPE_DSFP:
2908                 return 2;
2909         case MLXSW_REG_PMTM_MODULE_TYPE_C2C1X:
2910         case MLXSW_REG_PMTM_MODULE_TYPE_BP_1X:
2911         case MLXSW_REG_PMTM_MODULE_TYPE_SFP:
2912                 return 1;
2913         default:
2914                 return -EINVAL;
2915         }
2916 }
2917 EXPORT_SYMBOL(mlxsw_core_module_max_width);
2918
2919 static void mlxsw_core_buf_dump_dbg(struct mlxsw_core *mlxsw_core,
2920                                     const char *buf, size_t size)
2921 {
2922         __be32 *m = (__be32 *) buf;
2923         int i;
2924         int count = size / sizeof(__be32);
2925
2926         for (i = count - 1; i >= 0; i--)
2927                 if (m[i])
2928                         break;
2929         i++;
2930         count = i ? i : 1;
2931         for (i = 0; i < count; i += 4)
2932                 dev_dbg(mlxsw_core->bus_info->dev, "%04x - %08x %08x %08x %08x\n",
2933                         i * 4, be32_to_cpu(m[i]), be32_to_cpu(m[i + 1]),
2934                         be32_to_cpu(m[i + 2]), be32_to_cpu(m[i + 3]));
2935 }
2936
2937 int mlxsw_cmd_exec(struct mlxsw_core *mlxsw_core, u16 opcode, u8 opcode_mod,
2938                    u32 in_mod, bool out_mbox_direct, bool reset_ok,
2939                    char *in_mbox, size_t in_mbox_size,
2940                    char *out_mbox, size_t out_mbox_size)
2941 {
2942         u8 status;
2943         int err;
2944
2945         BUG_ON(in_mbox_size % sizeof(u32) || out_mbox_size % sizeof(u32));
2946         if (!mlxsw_core->bus->cmd_exec)
2947                 return -EOPNOTSUPP;
2948
2949         dev_dbg(mlxsw_core->bus_info->dev, "Cmd exec (opcode=%x(%s),opcode_mod=%x,in_mod=%x)\n",
2950                 opcode, mlxsw_cmd_opcode_str(opcode), opcode_mod, in_mod);
2951         if (in_mbox) {
2952                 dev_dbg(mlxsw_core->bus_info->dev, "Input mailbox:\n");
2953                 mlxsw_core_buf_dump_dbg(mlxsw_core, in_mbox, in_mbox_size);
2954         }
2955
2956         err = mlxsw_core->bus->cmd_exec(mlxsw_core->bus_priv, opcode,
2957                                         opcode_mod, in_mod, out_mbox_direct,
2958                                         in_mbox, in_mbox_size,
2959                                         out_mbox, out_mbox_size, &status);
2960
2961         if (!err && out_mbox) {
2962                 dev_dbg(mlxsw_core->bus_info->dev, "Output mailbox:\n");
2963                 mlxsw_core_buf_dump_dbg(mlxsw_core, out_mbox, out_mbox_size);
2964         }
2965
2966         if (reset_ok && err == -EIO &&
2967             status == MLXSW_CMD_STATUS_RUNNING_RESET) {
2968                 err = 0;
2969         } else if (err == -EIO && status != MLXSW_CMD_STATUS_OK) {
2970                 dev_err(mlxsw_core->bus_info->dev, "Cmd exec failed (opcode=%x(%s),opcode_mod=%x,in_mod=%x,status=%x(%s))\n",
2971                         opcode, mlxsw_cmd_opcode_str(opcode), opcode_mod,
2972                         in_mod, status, mlxsw_cmd_status_str(status));
2973         } else if (err == -ETIMEDOUT) {
2974                 dev_err(mlxsw_core->bus_info->dev, "Cmd exec timed-out (opcode=%x(%s),opcode_mod=%x,in_mod=%x)\n",
2975                         opcode, mlxsw_cmd_opcode_str(opcode), opcode_mod,
2976                         in_mod);
2977         }
2978
2979         return err;
2980 }
2981 EXPORT_SYMBOL(mlxsw_cmd_exec);
2982
2983 int mlxsw_core_schedule_dw(struct delayed_work *dwork, unsigned long delay)
2984 {
2985         return queue_delayed_work(mlxsw_wq, dwork, delay);
2986 }
2987 EXPORT_SYMBOL(mlxsw_core_schedule_dw);
2988
2989 bool mlxsw_core_schedule_work(struct work_struct *work)
2990 {
2991         return queue_work(mlxsw_owq, work);
2992 }
2993 EXPORT_SYMBOL(mlxsw_core_schedule_work);
2994
2995 void mlxsw_core_flush_owq(void)
2996 {
2997         flush_workqueue(mlxsw_owq);
2998 }
2999 EXPORT_SYMBOL(mlxsw_core_flush_owq);
3000
3001 int mlxsw_core_kvd_sizes_get(struct mlxsw_core *mlxsw_core,
3002                              const struct mlxsw_config_profile *profile,
3003                              u64 *p_single_size, u64 *p_double_size,
3004                              u64 *p_linear_size)
3005 {
3006         struct mlxsw_driver *driver = mlxsw_core->driver;
3007
3008         if (!driver->kvd_sizes_get)
3009                 return -EINVAL;
3010
3011         return driver->kvd_sizes_get(mlxsw_core, profile,
3012                                      p_single_size, p_double_size,
3013                                      p_linear_size);
3014 }
3015 EXPORT_SYMBOL(mlxsw_core_kvd_sizes_get);
3016
3017 int mlxsw_core_resources_query(struct mlxsw_core *mlxsw_core, char *mbox,
3018                                struct mlxsw_res *res)
3019 {
3020         int index, i;
3021         u64 data;
3022         u16 id;
3023         int err;
3024
3025         if (!res)
3026                 return 0;
3027
3028         mlxsw_cmd_mbox_zero(mbox);
3029
3030         for (index = 0; index < MLXSW_CMD_QUERY_RESOURCES_MAX_QUERIES;
3031              index++) {
3032                 err = mlxsw_cmd_query_resources(mlxsw_core, mbox, index);
3033                 if (err)
3034                         return err;
3035
3036                 for (i = 0; i < MLXSW_CMD_QUERY_RESOURCES_PER_QUERY; i++) {
3037                         id = mlxsw_cmd_mbox_query_resource_id_get(mbox, i);
3038                         data = mlxsw_cmd_mbox_query_resource_data_get(mbox, i);
3039
3040                         if (id == MLXSW_CMD_QUERY_RESOURCES_TABLE_END_ID)
3041                                 return 0;
3042
3043                         mlxsw_res_parse(res, id, data);
3044                 }
3045         }
3046
3047         /* If after MLXSW_RESOURCES_QUERY_MAX_QUERIES we still didn't get
3048          * MLXSW_RESOURCES_TABLE_END_ID, something went bad in the FW.
3049          */
3050         return -EIO;
3051 }
3052 EXPORT_SYMBOL(mlxsw_core_resources_query);
3053
3054 u32 mlxsw_core_read_frc_h(struct mlxsw_core *mlxsw_core)
3055 {
3056         return mlxsw_core->bus->read_frc_h(mlxsw_core->bus_priv);
3057 }
3058 EXPORT_SYMBOL(mlxsw_core_read_frc_h);
3059
3060 u32 mlxsw_core_read_frc_l(struct mlxsw_core *mlxsw_core)
3061 {
3062         return mlxsw_core->bus->read_frc_l(mlxsw_core->bus_priv);
3063 }
3064 EXPORT_SYMBOL(mlxsw_core_read_frc_l);
3065
3066 void mlxsw_core_emad_string_tlv_enable(struct mlxsw_core *mlxsw_core)
3067 {
3068         mlxsw_core->emad.enable_string_tlv = true;
3069 }
3070 EXPORT_SYMBOL(mlxsw_core_emad_string_tlv_enable);
3071
3072 static int __init mlxsw_core_module_init(void)
3073 {
3074         int err;
3075
3076         mlxsw_wq = alloc_workqueue(mlxsw_core_driver_name, 0, 0);
3077         if (!mlxsw_wq)
3078                 return -ENOMEM;
3079         mlxsw_owq = alloc_ordered_workqueue("%s_ordered", 0,
3080                                             mlxsw_core_driver_name);
3081         if (!mlxsw_owq) {
3082                 err = -ENOMEM;
3083                 goto err_alloc_ordered_workqueue;
3084         }
3085         return 0;
3086
3087 err_alloc_ordered_workqueue:
3088         destroy_workqueue(mlxsw_wq);
3089         return err;
3090 }
3091
3092 static void __exit mlxsw_core_module_exit(void)
3093 {
3094         destroy_workqueue(mlxsw_owq);
3095         destroy_workqueue(mlxsw_wq);
3096 }
3097
3098 module_init(mlxsw_core_module_init);
3099 module_exit(mlxsw_core_module_exit);
3100
3101 MODULE_LICENSE("Dual BSD/GPL");
3102 MODULE_AUTHOR("Jiri Pirko <jiri@mellanox.com>");
3103 MODULE_DESCRIPTION("Mellanox switch device core driver");