linux/drivers/net/wireless/libertas/mesh.c
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   1#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
   2
   3#include <linux/delay.h>
   4#include <linux/etherdevice.h>
   5#include <linux/hardirq.h>
   6#include <linux/netdevice.h>
   7#include <linux/if_ether.h>
   8#include <linux/if_arp.h>
   9#include <linux/kthread.h>
  10#include <linux/kfifo.h>
  11#include <net/cfg80211.h>
  12
  13#include "mesh.h"
  14#include "decl.h"
  15#include "cmd.h"
  16
  17
  18static int lbs_add_mesh(struct lbs_private *priv);
  19
  20/***************************************************************************
  21 * Mesh command handling
  22 */
  23
  24static int lbs_mesh_access(struct lbs_private *priv, uint16_t cmd_action,
  25                    struct cmd_ds_mesh_access *cmd)
  26{
  27        int ret;
  28
  29        lbs_deb_enter_args(LBS_DEB_CMD, "action %d", cmd_action);
  30
  31        cmd->hdr.command = cpu_to_le16(CMD_MESH_ACCESS);
  32        cmd->hdr.size = cpu_to_le16(sizeof(*cmd));
  33        cmd->hdr.result = 0;
  34
  35        cmd->action = cpu_to_le16(cmd_action);
  36
  37        ret = lbs_cmd_with_response(priv, CMD_MESH_ACCESS, cmd);
  38
  39        lbs_deb_leave(LBS_DEB_CMD);
  40        return ret;
  41}
  42
  43static int __lbs_mesh_config_send(struct lbs_private *priv,
  44                                  struct cmd_ds_mesh_config *cmd,
  45                                  uint16_t action, uint16_t type)
  46{
  47        int ret;
  48        u16 command = CMD_MESH_CONFIG_OLD;
  49
  50        lbs_deb_enter(LBS_DEB_CMD);
  51
  52        /*
  53         * Command id is 0xac for v10 FW along with mesh interface
  54         * id in bits 14-13-12.
  55         */
  56        if (priv->mesh_tlv == TLV_TYPE_MESH_ID)
  57                command = CMD_MESH_CONFIG |
  58                          (MESH_IFACE_ID << MESH_IFACE_BIT_OFFSET);
  59
  60        cmd->hdr.command = cpu_to_le16(command);
  61        cmd->hdr.size = cpu_to_le16(sizeof(struct cmd_ds_mesh_config));
  62        cmd->hdr.result = 0;
  63
  64        cmd->type = cpu_to_le16(type);
  65        cmd->action = cpu_to_le16(action);
  66
  67        ret = lbs_cmd_with_response(priv, command, cmd);
  68
  69        lbs_deb_leave(LBS_DEB_CMD);
  70        return ret;
  71}
  72
  73static int lbs_mesh_config_send(struct lbs_private *priv,
  74                         struct cmd_ds_mesh_config *cmd,
  75                         uint16_t action, uint16_t type)
  76{
  77        int ret;
  78
  79        if (!(priv->fwcapinfo & FW_CAPINFO_PERSISTENT_CONFIG))
  80                return -EOPNOTSUPP;
  81
  82        ret = __lbs_mesh_config_send(priv, cmd, action, type);
  83        return ret;
  84}
  85
  86/* This function is the CMD_MESH_CONFIG legacy function.  It only handles the
  87 * START and STOP actions.  The extended actions supported by CMD_MESH_CONFIG
  88 * are all handled by preparing a struct cmd_ds_mesh_config and passing it to
  89 * lbs_mesh_config_send.
  90 */
  91static int lbs_mesh_config(struct lbs_private *priv, uint16_t action,
  92                uint16_t chan)
  93{
  94        struct cmd_ds_mesh_config cmd;
  95        struct mrvl_meshie *ie;
  96        DECLARE_SSID_BUF(ssid);
  97
  98        memset(&cmd, 0, sizeof(cmd));
  99        cmd.channel = cpu_to_le16(chan);
 100        ie = (struct mrvl_meshie *)cmd.data;
 101
 102        switch (action) {
 103        case CMD_ACT_MESH_CONFIG_START:
 104                ie->id = WLAN_EID_VENDOR_SPECIFIC;
 105                ie->val.oui[0] = 0x00;
 106                ie->val.oui[1] = 0x50;
 107                ie->val.oui[2] = 0x43;
 108                ie->val.type = MARVELL_MESH_IE_TYPE;
 109                ie->val.subtype = MARVELL_MESH_IE_SUBTYPE;
 110                ie->val.version = MARVELL_MESH_IE_VERSION;
 111                ie->val.active_protocol_id = MARVELL_MESH_PROTO_ID_HWMP;
 112                ie->val.active_metric_id = MARVELL_MESH_METRIC_ID;
 113                ie->val.mesh_capability = MARVELL_MESH_CAPABILITY;
 114                ie->val.mesh_id_len = priv->mesh_ssid_len;
 115                memcpy(ie->val.mesh_id, priv->mesh_ssid, priv->mesh_ssid_len);
 116                ie->len = sizeof(struct mrvl_meshie_val) -
 117                        IEEE80211_MAX_SSID_LEN + priv->mesh_ssid_len;
 118                cmd.length = cpu_to_le16(sizeof(struct mrvl_meshie_val));
 119                break;
 120        case CMD_ACT_MESH_CONFIG_STOP:
 121                break;
 122        default:
 123                return -1;
 124        }
 125        lbs_deb_cmd("mesh config action %d type %x channel %d SSID %s\n",
 126                    action, priv->mesh_tlv, chan,
 127                    print_ssid(ssid, priv->mesh_ssid, priv->mesh_ssid_len));
 128
 129        return __lbs_mesh_config_send(priv, &cmd, action, priv->mesh_tlv);
 130}
 131
 132int lbs_mesh_set_channel(struct lbs_private *priv, u8 channel)
 133{
 134        priv->mesh_channel = channel;
 135        return lbs_mesh_config(priv, CMD_ACT_MESH_CONFIG_START, channel);
 136}
 137
 138static uint16_t lbs_mesh_get_channel(struct lbs_private *priv)
 139{
 140        return priv->mesh_channel ?: 1;
 141}
 142
 143/***************************************************************************
 144 * Mesh sysfs support
 145 */
 146
 147/*
 148 * Attributes exported through sysfs
 149 */
 150
 151/**
 152 * lbs_anycast_get - Get function for sysfs attribute anycast_mask
 153 * @dev: the &struct device
 154 * @attr: device attributes
 155 * @buf: buffer where data will be returned
 156 */
 157static ssize_t lbs_anycast_get(struct device *dev,
 158                struct device_attribute *attr, char * buf)
 159{
 160        struct lbs_private *priv = to_net_dev(dev)->ml_priv;
 161        struct cmd_ds_mesh_access mesh_access;
 162        int ret;
 163
 164        memset(&mesh_access, 0, sizeof(mesh_access));
 165
 166        ret = lbs_mesh_access(priv, CMD_ACT_MESH_GET_ANYCAST, &mesh_access);
 167        if (ret)
 168                return ret;
 169
 170        return snprintf(buf, 12, "0x%X\n", le32_to_cpu(mesh_access.data[0]));
 171}
 172
 173/**
 174 * lbs_anycast_set - Set function for sysfs attribute anycast_mask
 175 * @dev: the &struct device
 176 * @attr: device attributes
 177 * @buf: buffer that contains new attribute value
 178 * @count: size of buffer
 179 */
 180static ssize_t lbs_anycast_set(struct device *dev,
 181                struct device_attribute *attr, const char * buf, size_t count)
 182{
 183        struct lbs_private *priv = to_net_dev(dev)->ml_priv;
 184        struct cmd_ds_mesh_access mesh_access;
 185        uint32_t datum;
 186        int ret;
 187
 188        memset(&mesh_access, 0, sizeof(mesh_access));
 189        sscanf(buf, "%x", &datum);
 190        mesh_access.data[0] = cpu_to_le32(datum);
 191
 192        ret = lbs_mesh_access(priv, CMD_ACT_MESH_SET_ANYCAST, &mesh_access);
 193        if (ret)
 194                return ret;
 195
 196        return strlen(buf);
 197}
 198
 199/**
 200 * lbs_prb_rsp_limit_get - Get function for sysfs attribute prb_rsp_limit
 201 * @dev: the &struct device
 202 * @attr: device attributes
 203 * @buf: buffer where data will be returned
 204 */
 205static ssize_t lbs_prb_rsp_limit_get(struct device *dev,
 206                struct device_attribute *attr, char *buf)
 207{
 208        struct lbs_private *priv = to_net_dev(dev)->ml_priv;
 209        struct cmd_ds_mesh_access mesh_access;
 210        int ret;
 211        u32 retry_limit;
 212
 213        memset(&mesh_access, 0, sizeof(mesh_access));
 214        mesh_access.data[0] = cpu_to_le32(CMD_ACT_GET);
 215
 216        ret = lbs_mesh_access(priv, CMD_ACT_MESH_SET_GET_PRB_RSP_LIMIT,
 217                        &mesh_access);
 218        if (ret)
 219                return ret;
 220
 221        retry_limit = le32_to_cpu(mesh_access.data[1]);
 222        return snprintf(buf, 10, "%d\n", retry_limit);
 223}
 224
 225/**
 226 * lbs_prb_rsp_limit_set - Set function for sysfs attribute prb_rsp_limit
 227 * @dev: the &struct device
 228 * @attr: device attributes
 229 * @buf: buffer that contains new attribute value
 230 * @count: size of buffer
 231 */
 232static ssize_t lbs_prb_rsp_limit_set(struct device *dev,
 233                struct device_attribute *attr, const char *buf, size_t count)
 234{
 235        struct lbs_private *priv = to_net_dev(dev)->ml_priv;
 236        struct cmd_ds_mesh_access mesh_access;
 237        int ret;
 238        unsigned long retry_limit;
 239
 240        memset(&mesh_access, 0, sizeof(mesh_access));
 241        mesh_access.data[0] = cpu_to_le32(CMD_ACT_SET);
 242
 243        if (!strict_strtoul(buf, 10, &retry_limit))
 244                return -ENOTSUPP;
 245        if (retry_limit > 15)
 246                return -ENOTSUPP;
 247
 248        mesh_access.data[1] = cpu_to_le32(retry_limit);
 249
 250        ret = lbs_mesh_access(priv, CMD_ACT_MESH_SET_GET_PRB_RSP_LIMIT,
 251                        &mesh_access);
 252        if (ret)
 253                return ret;
 254
 255        return strlen(buf);
 256}
 257
 258/**
 259 * lbs_mesh_get - Get function for sysfs attribute mesh
 260 * @dev: the &struct device
 261 * @attr: device attributes
 262 * @buf: buffer where data will be returned
 263 */
 264static ssize_t lbs_mesh_get(struct device *dev,
 265                struct device_attribute *attr, char * buf)
 266{
 267        struct lbs_private *priv = to_net_dev(dev)->ml_priv;
 268        return snprintf(buf, 5, "0x%X\n", !!priv->mesh_dev);
 269}
 270
 271/**
 272 * lbs_mesh_set - Set function for sysfs attribute mesh
 273 * @dev: the &struct device
 274 * @attr: device attributes
 275 * @buf: buffer that contains new attribute value
 276 * @count: size of buffer
 277 */
 278static ssize_t lbs_mesh_set(struct device *dev,
 279                struct device_attribute *attr, const char * buf, size_t count)
 280{
 281        struct lbs_private *priv = to_net_dev(dev)->ml_priv;
 282        int enable;
 283
 284        sscanf(buf, "%x", &enable);
 285        enable = !!enable;
 286        if (enable == !!priv->mesh_dev)
 287                return count;
 288
 289        if (enable)
 290                lbs_add_mesh(priv);
 291        else
 292                lbs_remove_mesh(priv);
 293
 294        return count;
 295}
 296
 297/*
 298 * lbs_mesh attribute to be exported per ethX interface
 299 * through sysfs (/sys/class/net/ethX/lbs_mesh)
 300 */
 301static DEVICE_ATTR(lbs_mesh, 0644, lbs_mesh_get, lbs_mesh_set);
 302
 303/*
 304 * anycast_mask attribute to be exported per mshX interface
 305 * through sysfs (/sys/class/net/mshX/anycast_mask)
 306 */
 307static DEVICE_ATTR(anycast_mask, 0644, lbs_anycast_get, lbs_anycast_set);
 308
 309/*
 310 * prb_rsp_limit attribute to be exported per mshX interface
 311 * through sysfs (/sys/class/net/mshX/prb_rsp_limit)
 312 */
 313static DEVICE_ATTR(prb_rsp_limit, 0644, lbs_prb_rsp_limit_get,
 314                lbs_prb_rsp_limit_set);
 315
 316static struct attribute *lbs_mesh_sysfs_entries[] = {
 317        &dev_attr_anycast_mask.attr,
 318        &dev_attr_prb_rsp_limit.attr,
 319        NULL,
 320};
 321
 322static const struct attribute_group lbs_mesh_attr_group = {
 323        .attrs = lbs_mesh_sysfs_entries,
 324};
 325
 326
 327/***************************************************************************
 328 * Persistent configuration support
 329 */
 330
 331static int mesh_get_default_parameters(struct device *dev,
 332                                       struct mrvl_mesh_defaults *defs)
 333{
 334        struct lbs_private *priv = to_net_dev(dev)->ml_priv;
 335        struct cmd_ds_mesh_config cmd;
 336        int ret;
 337
 338        memset(&cmd, 0, sizeof(struct cmd_ds_mesh_config));
 339        ret = lbs_mesh_config_send(priv, &cmd, CMD_ACT_MESH_CONFIG_GET,
 340                                   CMD_TYPE_MESH_GET_DEFAULTS);
 341
 342        if (ret)
 343                return -EOPNOTSUPP;
 344
 345        memcpy(defs, &cmd.data[0], sizeof(struct mrvl_mesh_defaults));
 346
 347        return 0;
 348}
 349
 350/**
 351 * bootflag_get - Get function for sysfs attribute bootflag
 352 * @dev: the &struct device
 353 * @attr: device attributes
 354 * @buf: buffer where data will be returned
 355 */
 356static ssize_t bootflag_get(struct device *dev,
 357                            struct device_attribute *attr, char *buf)
 358{
 359        struct mrvl_mesh_defaults defs;
 360        int ret;
 361
 362        ret = mesh_get_default_parameters(dev, &defs);
 363
 364        if (ret)
 365                return ret;
 366
 367        return snprintf(buf, 12, "%d\n", le32_to_cpu(defs.bootflag));
 368}
 369
 370/**
 371 * bootflag_set - Set function for sysfs attribute bootflag
 372 * @dev: the &struct device
 373 * @attr: device attributes
 374 * @buf: buffer that contains new attribute value
 375 * @count: size of buffer
 376 */
 377static ssize_t bootflag_set(struct device *dev, struct device_attribute *attr,
 378                            const char *buf, size_t count)
 379{
 380        struct lbs_private *priv = to_net_dev(dev)->ml_priv;
 381        struct cmd_ds_mesh_config cmd;
 382        uint32_t datum;
 383        int ret;
 384
 385        memset(&cmd, 0, sizeof(cmd));
 386        ret = sscanf(buf, "%d", &datum);
 387        if ((ret != 1) || (datum > 1))
 388                return -EINVAL;
 389
 390        *((__le32 *)&cmd.data[0]) = cpu_to_le32(!!datum);
 391        cmd.length = cpu_to_le16(sizeof(uint32_t));
 392        ret = lbs_mesh_config_send(priv, &cmd, CMD_ACT_MESH_CONFIG_SET,
 393                                   CMD_TYPE_MESH_SET_BOOTFLAG);
 394        if (ret)
 395                return ret;
 396
 397        return strlen(buf);
 398}
 399
 400/**
 401 * boottime_get - Get function for sysfs attribute boottime
 402 * @dev: the &struct device
 403 * @attr: device attributes
 404 * @buf: buffer where data will be returned
 405 */
 406static ssize_t boottime_get(struct device *dev,
 407                            struct device_attribute *attr, char *buf)
 408{
 409        struct mrvl_mesh_defaults defs;
 410        int ret;
 411
 412        ret = mesh_get_default_parameters(dev, &defs);
 413
 414        if (ret)
 415                return ret;
 416
 417        return snprintf(buf, 12, "%d\n", defs.boottime);
 418}
 419
 420/**
 421 * boottime_set - Set function for sysfs attribute boottime
 422 * @dev: the &struct device
 423 * @attr: device attributes
 424 * @buf: buffer that contains new attribute value
 425 * @count: size of buffer
 426 */
 427static ssize_t boottime_set(struct device *dev,
 428                struct device_attribute *attr, const char *buf, size_t count)
 429{
 430        struct lbs_private *priv = to_net_dev(dev)->ml_priv;
 431        struct cmd_ds_mesh_config cmd;
 432        uint32_t datum;
 433        int ret;
 434
 435        memset(&cmd, 0, sizeof(cmd));
 436        ret = sscanf(buf, "%d", &datum);
 437        if ((ret != 1) || (datum > 255))
 438                return -EINVAL;
 439
 440        /* A too small boot time will result in the device booting into
 441         * standalone (no-host) mode before the host can take control of it,
 442         * so the change will be hard to revert.  This may be a desired
 443         * feature (e.g to configure a very fast boot time for devices that
 444         * will not be attached to a host), but dangerous.  So I'm enforcing a
 445         * lower limit of 20 seconds:  remove and recompile the driver if this
 446         * does not work for you.
 447         */
 448        datum = (datum < 20) ? 20 : datum;
 449        cmd.data[0] = datum;
 450        cmd.length = cpu_to_le16(sizeof(uint8_t));
 451        ret = lbs_mesh_config_send(priv, &cmd, CMD_ACT_MESH_CONFIG_SET,
 452                                   CMD_TYPE_MESH_SET_BOOTTIME);
 453        if (ret)
 454                return ret;
 455
 456        return strlen(buf);
 457}
 458
 459/**
 460 * channel_get - Get function for sysfs attribute channel
 461 * @dev: the &struct device
 462 * @attr: device attributes
 463 * @buf: buffer where data will be returned
 464 */
 465static ssize_t channel_get(struct device *dev,
 466                           struct device_attribute *attr, char *buf)
 467{
 468        struct mrvl_mesh_defaults defs;
 469        int ret;
 470
 471        ret = mesh_get_default_parameters(dev, &defs);
 472
 473        if (ret)
 474                return ret;
 475
 476        return snprintf(buf, 12, "%d\n", le16_to_cpu(defs.channel));
 477}
 478
 479/**
 480 * channel_set - Set function for sysfs attribute channel
 481 * @dev: the &struct device
 482 * @attr: device attributes
 483 * @buf: buffer that contains new attribute value
 484 * @count: size of buffer
 485 */
 486static ssize_t channel_set(struct device *dev, struct device_attribute *attr,
 487                           const char *buf, size_t count)
 488{
 489        struct lbs_private *priv = to_net_dev(dev)->ml_priv;
 490        struct cmd_ds_mesh_config cmd;
 491        uint32_t datum;
 492        int ret;
 493
 494        memset(&cmd, 0, sizeof(cmd));
 495        ret = sscanf(buf, "%d", &datum);
 496        if (ret != 1 || datum < 1 || datum > 11)
 497                return -EINVAL;
 498
 499        *((__le16 *)&cmd.data[0]) = cpu_to_le16(datum);
 500        cmd.length = cpu_to_le16(sizeof(uint16_t));
 501        ret = lbs_mesh_config_send(priv, &cmd, CMD_ACT_MESH_CONFIG_SET,
 502                                   CMD_TYPE_MESH_SET_DEF_CHANNEL);
 503        if (ret)
 504                return ret;
 505
 506        return strlen(buf);
 507}
 508
 509/**
 510 * mesh_id_get - Get function for sysfs attribute mesh_id
 511 * @dev: the &struct device
 512 * @attr: device attributes
 513 * @buf: buffer where data will be returned
 514 */
 515static ssize_t mesh_id_get(struct device *dev, struct device_attribute *attr,
 516                           char *buf)
 517{
 518        struct mrvl_mesh_defaults defs;
 519        int ret;
 520
 521        ret = mesh_get_default_parameters(dev, &defs);
 522
 523        if (ret)
 524                return ret;
 525
 526        if (defs.meshie.val.mesh_id_len > IEEE80211_MAX_SSID_LEN) {
 527                dev_err(dev, "inconsistent mesh ID length\n");
 528                defs.meshie.val.mesh_id_len = IEEE80211_MAX_SSID_LEN;
 529        }
 530
 531        memcpy(buf, defs.meshie.val.mesh_id, defs.meshie.val.mesh_id_len);
 532        buf[defs.meshie.val.mesh_id_len] = '\n';
 533        buf[defs.meshie.val.mesh_id_len + 1] = '\0';
 534
 535        return defs.meshie.val.mesh_id_len + 1;
 536}
 537
 538/**
 539 * mesh_id_set - Set function for sysfs attribute mesh_id
 540 * @dev: the &struct device
 541 * @attr: device attributes
 542 * @buf: buffer that contains new attribute value
 543 * @count: size of buffer
 544 */
 545static ssize_t mesh_id_set(struct device *dev, struct device_attribute *attr,
 546                           const char *buf, size_t count)
 547{
 548        struct cmd_ds_mesh_config cmd;
 549        struct mrvl_mesh_defaults defs;
 550        struct mrvl_meshie *ie;
 551        struct lbs_private *priv = to_net_dev(dev)->ml_priv;
 552        int len;
 553        int ret;
 554
 555        if (count < 2 || count > IEEE80211_MAX_SSID_LEN + 1)
 556                return -EINVAL;
 557
 558        memset(&cmd, 0, sizeof(struct cmd_ds_mesh_config));
 559        ie = (struct mrvl_meshie *) &cmd.data[0];
 560
 561        /* fetch all other Information Element parameters */
 562        ret = mesh_get_default_parameters(dev, &defs);
 563
 564        cmd.length = cpu_to_le16(sizeof(struct mrvl_meshie));
 565
 566        /* transfer IE elements */
 567        memcpy(ie, &defs.meshie, sizeof(struct mrvl_meshie));
 568
 569        len = count - 1;
 570        memcpy(ie->val.mesh_id, buf, len);
 571        /* SSID len */
 572        ie->val.mesh_id_len = len;
 573        /* IE len */
 574        ie->len = sizeof(struct mrvl_meshie_val) - IEEE80211_MAX_SSID_LEN + len;
 575
 576        ret = lbs_mesh_config_send(priv, &cmd, CMD_ACT_MESH_CONFIG_SET,
 577                                   CMD_TYPE_MESH_SET_MESH_IE);
 578        if (ret)
 579                return ret;
 580
 581        return strlen(buf);
 582}
 583
 584/**
 585 * protocol_id_get - Get function for sysfs attribute protocol_id
 586 * @dev: the &struct device
 587 * @attr: device attributes
 588 * @buf: buffer where data will be returned
 589 */
 590static ssize_t protocol_id_get(struct device *dev,
 591                               struct device_attribute *attr, char *buf)
 592{
 593        struct mrvl_mesh_defaults defs;
 594        int ret;
 595
 596        ret = mesh_get_default_parameters(dev, &defs);
 597
 598        if (ret)
 599                return ret;
 600
 601        return snprintf(buf, 5, "%d\n", defs.meshie.val.active_protocol_id);
 602}
 603
 604/**
 605 * protocol_id_set - Set function for sysfs attribute protocol_id
 606 * @dev: the &struct device
 607 * @attr: device attributes
 608 * @buf: buffer that contains new attribute value
 609 * @count: size of buffer
 610 */
 611static ssize_t protocol_id_set(struct device *dev,
 612                struct device_attribute *attr, const char *buf, size_t count)
 613{
 614        struct cmd_ds_mesh_config cmd;
 615        struct mrvl_mesh_defaults defs;
 616        struct mrvl_meshie *ie;
 617        struct lbs_private *priv = to_net_dev(dev)->ml_priv;
 618        uint32_t datum;
 619        int ret;
 620
 621        memset(&cmd, 0, sizeof(cmd));
 622        ret = sscanf(buf, "%d", &datum);
 623        if ((ret != 1) || (datum > 255))
 624                return -EINVAL;
 625
 626        /* fetch all other Information Element parameters */
 627        ret = mesh_get_default_parameters(dev, &defs);
 628
 629        cmd.length = cpu_to_le16(sizeof(struct mrvl_meshie));
 630
 631        /* transfer IE elements */
 632        ie = (struct mrvl_meshie *) &cmd.data[0];
 633        memcpy(ie, &defs.meshie, sizeof(struct mrvl_meshie));
 634        /* update protocol id */
 635        ie->val.active_protocol_id = datum;
 636
 637        ret = lbs_mesh_config_send(priv, &cmd, CMD_ACT_MESH_CONFIG_SET,
 638                                   CMD_TYPE_MESH_SET_MESH_IE);
 639        if (ret)
 640                return ret;
 641
 642        return strlen(buf);
 643}
 644
 645/**
 646 * metric_id_get - Get function for sysfs attribute metric_id
 647 * @dev: the &struct device
 648 * @attr: device attributes
 649 * @buf: buffer where data will be returned
 650 */
 651static ssize_t metric_id_get(struct device *dev,
 652                struct device_attribute *attr, char *buf)
 653{
 654        struct mrvl_mesh_defaults defs;
 655        int ret;
 656
 657        ret = mesh_get_default_parameters(dev, &defs);
 658
 659        if (ret)
 660                return ret;
 661
 662        return snprintf(buf, 5, "%d\n", defs.meshie.val.active_metric_id);
 663}
 664
 665/**
 666 * metric_id_set - Set function for sysfs attribute metric_id
 667 * @dev: the &struct device
 668 * @attr: device attributes
 669 * @buf: buffer that contains new attribute value
 670 * @count: size of buffer
 671 */
 672static ssize_t metric_id_set(struct device *dev, struct device_attribute *attr,
 673                             const char *buf, size_t count)
 674{
 675        struct cmd_ds_mesh_config cmd;
 676        struct mrvl_mesh_defaults defs;
 677        struct mrvl_meshie *ie;
 678        struct lbs_private *priv = to_net_dev(dev)->ml_priv;
 679        uint32_t datum;
 680        int ret;
 681
 682        memset(&cmd, 0, sizeof(cmd));
 683        ret = sscanf(buf, "%d", &datum);
 684        if ((ret != 1) || (datum > 255))
 685                return -EINVAL;
 686
 687        /* fetch all other Information Element parameters */
 688        ret = mesh_get_default_parameters(dev, &defs);
 689
 690        cmd.length = cpu_to_le16(sizeof(struct mrvl_meshie));
 691
 692        /* transfer IE elements */
 693        ie = (struct mrvl_meshie *) &cmd.data[0];
 694        memcpy(ie, &defs.meshie, sizeof(struct mrvl_meshie));
 695        /* update metric id */
 696        ie->val.active_metric_id = datum;
 697
 698        ret = lbs_mesh_config_send(priv, &cmd, CMD_ACT_MESH_CONFIG_SET,
 699                                   CMD_TYPE_MESH_SET_MESH_IE);
 700        if (ret)
 701                return ret;
 702
 703        return strlen(buf);
 704}
 705
 706/**
 707 * capability_get - Get function for sysfs attribute capability
 708 * @dev: the &struct device
 709 * @attr: device attributes
 710 * @buf: buffer where data will be returned
 711 */
 712static ssize_t capability_get(struct device *dev,
 713                struct device_attribute *attr, char *buf)
 714{
 715        struct mrvl_mesh_defaults defs;
 716        int ret;
 717
 718        ret = mesh_get_default_parameters(dev, &defs);
 719
 720        if (ret)
 721                return ret;
 722
 723        return snprintf(buf, 5, "%d\n", defs.meshie.val.mesh_capability);
 724}
 725
 726/**
 727 * capability_set - Set function for sysfs attribute capability
 728 * @dev: the &struct device
 729 * @attr: device attributes
 730 * @buf: buffer that contains new attribute value
 731 * @count: size of buffer
 732 */
 733static ssize_t capability_set(struct device *dev, struct device_attribute *attr,
 734                              const char *buf, size_t count)
 735{
 736        struct cmd_ds_mesh_config cmd;
 737        struct mrvl_mesh_defaults defs;
 738        struct mrvl_meshie *ie;
 739        struct lbs_private *priv = to_net_dev(dev)->ml_priv;
 740        uint32_t datum;
 741        int ret;
 742
 743        memset(&cmd, 0, sizeof(cmd));
 744        ret = sscanf(buf, "%d", &datum);
 745        if ((ret != 1) || (datum > 255))
 746                return -EINVAL;
 747
 748        /* fetch all other Information Element parameters */
 749        ret = mesh_get_default_parameters(dev, &defs);
 750
 751        cmd.length = cpu_to_le16(sizeof(struct mrvl_meshie));
 752
 753        /* transfer IE elements */
 754        ie = (struct mrvl_meshie *) &cmd.data[0];
 755        memcpy(ie, &defs.meshie, sizeof(struct mrvl_meshie));
 756        /* update value */
 757        ie->val.mesh_capability = datum;
 758
 759        ret = lbs_mesh_config_send(priv, &cmd, CMD_ACT_MESH_CONFIG_SET,
 760                                   CMD_TYPE_MESH_SET_MESH_IE);
 761        if (ret)
 762                return ret;
 763
 764        return strlen(buf);
 765}
 766
 767
 768static DEVICE_ATTR(bootflag, 0644, bootflag_get, bootflag_set);
 769static DEVICE_ATTR(boottime, 0644, boottime_get, boottime_set);
 770static DEVICE_ATTR(channel, 0644, channel_get, channel_set);
 771static DEVICE_ATTR(mesh_id, 0644, mesh_id_get, mesh_id_set);
 772static DEVICE_ATTR(protocol_id, 0644, protocol_id_get, protocol_id_set);
 773static DEVICE_ATTR(metric_id, 0644, metric_id_get, metric_id_set);
 774static DEVICE_ATTR(capability, 0644, capability_get, capability_set);
 775
 776static struct attribute *boot_opts_attrs[] = {
 777        &dev_attr_bootflag.attr,
 778        &dev_attr_boottime.attr,
 779        &dev_attr_channel.attr,
 780        NULL
 781};
 782
 783static const struct attribute_group boot_opts_group = {
 784        .name = "boot_options",
 785        .attrs = boot_opts_attrs,
 786};
 787
 788static struct attribute *mesh_ie_attrs[] = {
 789        &dev_attr_mesh_id.attr,
 790        &dev_attr_protocol_id.attr,
 791        &dev_attr_metric_id.attr,
 792        &dev_attr_capability.attr,
 793        NULL
 794};
 795
 796static const struct attribute_group mesh_ie_group = {
 797        .name = "mesh_ie",
 798        .attrs = mesh_ie_attrs,
 799};
 800
 801static void lbs_persist_config_init(struct net_device *dev)
 802{
 803        int ret;
 804        ret = sysfs_create_group(&(dev->dev.kobj), &boot_opts_group);
 805        ret = sysfs_create_group(&(dev->dev.kobj), &mesh_ie_group);
 806}
 807
 808static void lbs_persist_config_remove(struct net_device *dev)
 809{
 810        sysfs_remove_group(&(dev->dev.kobj), &boot_opts_group);
 811        sysfs_remove_group(&(dev->dev.kobj), &mesh_ie_group);
 812}
 813
 814
 815/***************************************************************************
 816 * Initializing and starting, stopping mesh
 817 */
 818
 819/*
 820 * Check mesh FW version and appropriately send the mesh start
 821 * command
 822 */
 823int lbs_init_mesh(struct lbs_private *priv)
 824{
 825        int ret = 0;
 826
 827        lbs_deb_enter(LBS_DEB_MESH);
 828
 829        /* Determine mesh_fw_ver from fwrelease and fwcapinfo */
 830        /* 5.0.16p0 9.0.0.p0 is known to NOT support any mesh */
 831        /* 5.110.22 have mesh command with 0xa3 command id */
 832        /* 10.0.0.p0 FW brings in mesh config command with different id */
 833        /* Check FW version MSB and initialize mesh_fw_ver */
 834        if (MRVL_FW_MAJOR_REV(priv->fwrelease) == MRVL_FW_V5) {
 835                /* Enable mesh, if supported, and work out which TLV it uses.
 836                   0x100 + 291 is an unofficial value used in 5.110.20.pXX
 837                   0x100 + 37 is the official value used in 5.110.21.pXX
 838                   but we check them in that order because 20.pXX doesn't
 839                   give an error -- it just silently fails. */
 840
 841                /* 5.110.20.pXX firmware will fail the command if the channel
 842                   doesn't match the existing channel. But only if the TLV
 843                   is correct. If the channel is wrong, _BOTH_ versions will
 844                   give an error to 0x100+291, and allow 0x100+37 to succeed.
 845                   It's just that 5.110.20.pXX will not have done anything
 846                   useful */
 847
 848                priv->mesh_tlv = TLV_TYPE_OLD_MESH_ID;
 849                if (lbs_mesh_config(priv, CMD_ACT_MESH_CONFIG_START, 1)) {
 850                        priv->mesh_tlv = TLV_TYPE_MESH_ID;
 851                        if (lbs_mesh_config(priv, CMD_ACT_MESH_CONFIG_START, 1))
 852                                priv->mesh_tlv = 0;
 853                }
 854        } else
 855        if ((MRVL_FW_MAJOR_REV(priv->fwrelease) >= MRVL_FW_V10) &&
 856                (priv->fwcapinfo & MESH_CAPINFO_ENABLE_MASK)) {
 857                /* 10.0.0.pXX new firmwares should succeed with TLV
 858                 * 0x100+37; Do not invoke command with old TLV.
 859                 */
 860                priv->mesh_tlv = TLV_TYPE_MESH_ID;
 861                if (lbs_mesh_config(priv, CMD_ACT_MESH_CONFIG_START, 1))
 862                        priv->mesh_tlv = 0;
 863        }
 864
 865        /* Stop meshing until interface is brought up */
 866        lbs_mesh_config(priv, CMD_ACT_MESH_CONFIG_STOP, 1);
 867
 868        if (priv->mesh_tlv) {
 869                sprintf(priv->mesh_ssid, "mesh");
 870                priv->mesh_ssid_len = 4;
 871                ret = 1;
 872        }
 873
 874        lbs_deb_leave_args(LBS_DEB_MESH, "ret %d", ret);
 875        return ret;
 876}
 877
 878void lbs_start_mesh(struct lbs_private *priv)
 879{
 880        lbs_add_mesh(priv);
 881
 882        if (device_create_file(&priv->dev->dev, &dev_attr_lbs_mesh))
 883                netdev_err(priv->dev, "cannot register lbs_mesh attribute\n");
 884}
 885
 886int lbs_deinit_mesh(struct lbs_private *priv)
 887{
 888        struct net_device *dev = priv->dev;
 889        int ret = 0;
 890
 891        lbs_deb_enter(LBS_DEB_MESH);
 892
 893        if (priv->mesh_tlv) {
 894                device_remove_file(&dev->dev, &dev_attr_lbs_mesh);
 895                ret = 1;
 896        }
 897
 898        lbs_deb_leave_args(LBS_DEB_MESH, "ret %d", ret);
 899        return ret;
 900}
 901
 902
 903/**
 904 * lbs_mesh_stop - close the mshX interface
 905 *
 906 * @dev:        A pointer to &net_device structure
 907 * returns:     0
 908 */
 909static int lbs_mesh_stop(struct net_device *dev)
 910{
 911        struct lbs_private *priv = dev->ml_priv;
 912
 913        lbs_deb_enter(LBS_DEB_MESH);
 914        lbs_mesh_config(priv, CMD_ACT_MESH_CONFIG_STOP,
 915                lbs_mesh_get_channel(priv));
 916
 917        spin_lock_irq(&priv->driver_lock);
 918
 919        netif_stop_queue(dev);
 920        netif_carrier_off(dev);
 921
 922        spin_unlock_irq(&priv->driver_lock);
 923
 924        lbs_update_mcast(priv);
 925        if (!lbs_iface_active(priv))
 926                lbs_stop_iface(priv);
 927
 928        lbs_deb_leave(LBS_DEB_MESH);
 929        return 0;
 930}
 931
 932/**
 933 * lbs_mesh_dev_open - open the mshX interface
 934 *
 935 * @dev:        A pointer to &net_device structure
 936 * returns:     0 or -EBUSY if monitor mode active
 937 */
 938static int lbs_mesh_dev_open(struct net_device *dev)
 939{
 940        struct lbs_private *priv = dev->ml_priv;
 941        int ret = 0;
 942
 943        lbs_deb_enter(LBS_DEB_NET);
 944        if (!priv->iface_running) {
 945                ret = lbs_start_iface(priv);
 946                if (ret)
 947                        goto out;
 948        }
 949
 950        spin_lock_irq(&priv->driver_lock);
 951
 952        if (priv->wdev->iftype == NL80211_IFTYPE_MONITOR) {
 953                ret = -EBUSY;
 954                spin_unlock_irq(&priv->driver_lock);
 955                goto out;
 956        }
 957
 958        netif_carrier_on(dev);
 959
 960        if (!priv->tx_pending_len)
 961                netif_wake_queue(dev);
 962
 963        spin_unlock_irq(&priv->driver_lock);
 964
 965        ret = lbs_mesh_config(priv, CMD_ACT_MESH_CONFIG_START,
 966                lbs_mesh_get_channel(priv));
 967
 968out:
 969        lbs_deb_leave_args(LBS_DEB_NET, "ret %d", ret);
 970        return ret;
 971}
 972
 973static const struct net_device_ops mesh_netdev_ops = {
 974        .ndo_open               = lbs_mesh_dev_open,
 975        .ndo_stop               = lbs_mesh_stop,
 976        .ndo_start_xmit         = lbs_hard_start_xmit,
 977        .ndo_set_mac_address    = lbs_set_mac_address,
 978        .ndo_set_rx_mode        = lbs_set_multicast_list,
 979};
 980
 981/**
 982 * lbs_add_mesh - add mshX interface
 983 *
 984 * @priv:       A pointer to the &struct lbs_private structure
 985 * returns:     0 if successful, -X otherwise
 986 */
 987static int lbs_add_mesh(struct lbs_private *priv)
 988{
 989        struct net_device *mesh_dev = NULL;
 990        struct wireless_dev *mesh_wdev;
 991        int ret = 0;
 992
 993        lbs_deb_enter(LBS_DEB_MESH);
 994
 995        /* Allocate a virtual mesh device */
 996        mesh_wdev = kzalloc(sizeof(struct wireless_dev), GFP_KERNEL);
 997        if (!mesh_wdev) {
 998                lbs_deb_mesh("init mshX wireless device failed\n");
 999                ret = -ENOMEM;
1000                goto done;
1001        }
1002
1003        mesh_dev = alloc_netdev(0, "msh%d", ether_setup);
1004        if (!mesh_dev) {
1005                lbs_deb_mesh("init mshX device failed\n");
1006                ret = -ENOMEM;
1007                goto err_free_wdev;
1008        }
1009
1010        mesh_wdev->iftype = NL80211_IFTYPE_MESH_POINT;
1011        mesh_wdev->wiphy = priv->wdev->wiphy;
1012        mesh_wdev->netdev = mesh_dev;
1013
1014        mesh_dev->ml_priv = priv;
1015        mesh_dev->ieee80211_ptr = mesh_wdev;
1016        priv->mesh_dev = mesh_dev;
1017
1018        mesh_dev->netdev_ops = &mesh_netdev_ops;
1019        mesh_dev->ethtool_ops = &lbs_ethtool_ops;
1020        memcpy(mesh_dev->dev_addr, priv->dev->dev_addr, ETH_ALEN);
1021
1022        SET_NETDEV_DEV(priv->mesh_dev, priv->dev->dev.parent);
1023
1024        mesh_dev->flags |= IFF_BROADCAST | IFF_MULTICAST;
1025        /* Register virtual mesh interface */
1026        ret = register_netdev(mesh_dev);
1027        if (ret) {
1028                pr_err("cannot register mshX virtual interface\n");
1029                goto err_free_netdev;
1030        }
1031
1032        ret = sysfs_create_group(&(mesh_dev->dev.kobj), &lbs_mesh_attr_group);
1033        if (ret)
1034                goto err_unregister;
1035
1036        lbs_persist_config_init(mesh_dev);
1037
1038        /* Everything successful */
1039        ret = 0;
1040        goto done;
1041
1042err_unregister:
1043        unregister_netdev(mesh_dev);
1044
1045err_free_netdev:
1046        free_netdev(mesh_dev);
1047
1048err_free_wdev:
1049        kfree(mesh_wdev);
1050
1051done:
1052        lbs_deb_leave_args(LBS_DEB_MESH, "ret %d", ret);
1053        return ret;
1054}
1055
1056void lbs_remove_mesh(struct lbs_private *priv)
1057{
1058        struct net_device *mesh_dev;
1059
1060        mesh_dev = priv->mesh_dev;
1061        if (!mesh_dev)
1062                return;
1063
1064        lbs_deb_enter(LBS_DEB_MESH);
1065        netif_stop_queue(mesh_dev);
1066        netif_carrier_off(mesh_dev);
1067        sysfs_remove_group(&(mesh_dev->dev.kobj), &lbs_mesh_attr_group);
1068        lbs_persist_config_remove(mesh_dev);
1069        unregister_netdev(mesh_dev);
1070        priv->mesh_dev = NULL;
1071        kfree(mesh_dev->ieee80211_ptr);
1072        free_netdev(mesh_dev);
1073        lbs_deb_leave(LBS_DEB_MESH);
1074}
1075
1076
1077/***************************************************************************
1078 * Sending and receiving
1079 */
1080struct net_device *lbs_mesh_set_dev(struct lbs_private *priv,
1081        struct net_device *dev, struct rxpd *rxpd)
1082{
1083        if (priv->mesh_dev) {
1084                if (priv->mesh_tlv == TLV_TYPE_OLD_MESH_ID) {
1085                        if (rxpd->rx_control & RxPD_MESH_FRAME)
1086                                dev = priv->mesh_dev;
1087                } else if (priv->mesh_tlv == TLV_TYPE_MESH_ID) {
1088                        if (rxpd->u.bss.bss_num == MESH_IFACE_ID)
1089                                dev = priv->mesh_dev;
1090                }
1091        }
1092        return dev;
1093}
1094
1095
1096void lbs_mesh_set_txpd(struct lbs_private *priv,
1097        struct net_device *dev, struct txpd *txpd)
1098{
1099        if (dev == priv->mesh_dev) {
1100                if (priv->mesh_tlv == TLV_TYPE_OLD_MESH_ID)
1101                        txpd->tx_control |= cpu_to_le32(TxPD_MESH_FRAME);
1102                else if (priv->mesh_tlv == TLV_TYPE_MESH_ID)
1103                        txpd->u.bss.bss_num = MESH_IFACE_ID;
1104        }
1105}
1106
1107
1108/***************************************************************************
1109 * Ethtool related
1110 */
1111
1112static const char * const mesh_stat_strings[] = {
1113                        "drop_duplicate_bcast",
1114                        "drop_ttl_zero",
1115                        "drop_no_fwd_route",
1116                        "drop_no_buffers",
1117                        "fwded_unicast_cnt",
1118                        "fwded_bcast_cnt",
1119                        "drop_blind_table",
1120                        "tx_failed_cnt"
1121};
1122
1123void lbs_mesh_ethtool_get_stats(struct net_device *dev,
1124        struct ethtool_stats *stats, uint64_t *data)
1125{
1126        struct lbs_private *priv = dev->ml_priv;
1127        struct cmd_ds_mesh_access mesh_access;
1128        int ret;
1129
1130        lbs_deb_enter(LBS_DEB_ETHTOOL);
1131
1132        /* Get Mesh Statistics */
1133        ret = lbs_mesh_access(priv, CMD_ACT_MESH_GET_STATS, &mesh_access);
1134
1135        if (ret) {
1136                memset(data, 0, MESH_STATS_NUM*(sizeof(uint64_t)));
1137                return;
1138        }
1139
1140        priv->mstats.fwd_drop_rbt = le32_to_cpu(mesh_access.data[0]);
1141        priv->mstats.fwd_drop_ttl = le32_to_cpu(mesh_access.data[1]);
1142        priv->mstats.fwd_drop_noroute = le32_to_cpu(mesh_access.data[2]);
1143        priv->mstats.fwd_drop_nobuf = le32_to_cpu(mesh_access.data[3]);
1144        priv->mstats.fwd_unicast_cnt = le32_to_cpu(mesh_access.data[4]);
1145        priv->mstats.fwd_bcast_cnt = le32_to_cpu(mesh_access.data[5]);
1146        priv->mstats.drop_blind = le32_to_cpu(mesh_access.data[6]);
1147        priv->mstats.tx_failed_cnt = le32_to_cpu(mesh_access.data[7]);
1148
1149        data[0] = priv->mstats.fwd_drop_rbt;
1150        data[1] = priv->mstats.fwd_drop_ttl;
1151        data[2] = priv->mstats.fwd_drop_noroute;
1152        data[3] = priv->mstats.fwd_drop_nobuf;
1153        data[4] = priv->mstats.fwd_unicast_cnt;
1154        data[5] = priv->mstats.fwd_bcast_cnt;
1155        data[6] = priv->mstats.drop_blind;
1156        data[7] = priv->mstats.tx_failed_cnt;
1157
1158        lbs_deb_enter(LBS_DEB_ETHTOOL);
1159}
1160
1161int lbs_mesh_ethtool_get_sset_count(struct net_device *dev, int sset)
1162{
1163        struct lbs_private *priv = dev->ml_priv;
1164
1165        if (sset == ETH_SS_STATS && dev == priv->mesh_dev)
1166                return MESH_STATS_NUM;
1167
1168        return -EOPNOTSUPP;
1169}
1170
1171void lbs_mesh_ethtool_get_strings(struct net_device *dev,
1172        uint32_t stringset, uint8_t *s)
1173{
1174        int i;
1175
1176        lbs_deb_enter(LBS_DEB_ETHTOOL);
1177
1178        switch (stringset) {
1179        case ETH_SS_STATS:
1180                for (i = 0; i < MESH_STATS_NUM; i++) {
1181                        memcpy(s + i * ETH_GSTRING_LEN,
1182                                        mesh_stat_strings[i],
1183                                        ETH_GSTRING_LEN);
1184                }
1185                break;
1186        }
1187        lbs_deb_enter(LBS_DEB_ETHTOOL);
1188}
1189