drivers/net/wireless/libertas/mesh.c

   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
  18 static int lbs_add_mesh(struct lbs_private *priv);
  19
  20 /***************************************************************************
  21  * Mesh command handling
  22  */
  23
  24 static 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
  43 static 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
  73 static 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  */
  91 static 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_GENERIC;
 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
 132 int lbs_mesh_set_channel(struct lbs_private *priv, u8 channel)
 133 {
 134         return lbs_mesh_config(priv, CMD_ACT_MESH_CONFIG_START, channel);
 135 }
 136
 137 static uint16_t lbs_mesh_get_channel(struct lbs_private *priv)
 138 {
 139         struct wireless_dev *mesh_wdev = priv->mesh_dev->ieee80211_ptr;
 140         if (mesh_wdev->channel)
 141                 return mesh_wdev->channel->hw_value;
 142         else
 143                 return 1;
 144 }
 145
 146 /***************************************************************************
 147  * Mesh sysfs support
 148  */
 149
 150 /*
 151  * Attributes exported through sysfs
 152  */
 153
 154 /**
 155  * lbs_anycast_get - Get function for sysfs attribute anycast_mask
 156  * @dev: the &struct device
 157  * @attr: device attributes
 158  * @buf: buffer where data will be returned
 159  */
 160 static ssize_t lbs_anycast_get(struct device *dev,
 161                 struct device_attribute *attr, char * buf)
 162 {
 163         struct lbs_private *priv = to_net_dev(dev)->ml_priv;
 164         struct cmd_ds_mesh_access mesh_access;
 165         int ret;
 166
 167         memset(&mesh_access, 0, sizeof(mesh_access));
 168
 169         ret = lbs_mesh_access(priv, CMD_ACT_MESH_GET_ANYCAST, &mesh_access);
 170         if (ret)
 171                 return ret;
 172
 173         return snprintf(buf, 12, "0x%X\n", le32_to_cpu(mesh_access.data[0]));
 174 }
 175
 176 /**
 177  * lbs_anycast_set - Set function for sysfs attribute anycast_mask
 178  * @dev: the &struct device
 179  * @attr: device attributes
 180  * @buf: buffer that contains new attribute value
 181  * @count: size of buffer
 182  */
 183 static ssize_t lbs_anycast_set(struct device *dev,
 184                 struct device_attribute *attr, const char * buf, size_t count)
 185 {
 186         struct lbs_private *priv = to_net_dev(dev)->ml_priv;
 187         struct cmd_ds_mesh_access mesh_access;
 188         uint32_t datum;
 189         int ret;
 190
 191         memset(&mesh_access, 0, sizeof(mesh_access));
 192         sscanf(buf, "%x", &datum);
 193         mesh_access.data[0] = cpu_to_le32(datum);
 194
 195         ret = lbs_mesh_access(priv, CMD_ACT_MESH_SET_ANYCAST, &mesh_access);
 196         if (ret)
 197                 return ret;
 198
 199         return strlen(buf);
 200 }
 201
 202 /**
 203  * lbs_prb_rsp_limit_get - Get function for sysfs attribute prb_rsp_limit
 204  * @dev: the &struct device
 205  * @attr: device attributes
 206  * @buf: buffer where data will be returned
 207  */
 208 static ssize_t lbs_prb_rsp_limit_get(struct device *dev,
 209                 struct device_attribute *attr, char *buf)
 210 {
 211         struct lbs_private *priv = to_net_dev(dev)->ml_priv;
 212         struct cmd_ds_mesh_access mesh_access;
 213         int ret;
 214         u32 retry_limit;
 215
 216         memset(&mesh_access, 0, sizeof(mesh_access));
 217         mesh_access.data[0] = cpu_to_le32(CMD_ACT_GET);
 218
 219         ret = lbs_mesh_access(priv, CMD_ACT_MESH_SET_GET_PRB_RSP_LIMIT,
 220                         &mesh_access);
 221         if (ret)
 222                 return ret;
 223
 224         retry_limit = le32_to_cpu(mesh_access.data[1]);
 225         return snprintf(buf, 10, "%d\n", retry_limit);
 226 }
 227
 228 /**
 229  * lbs_prb_rsp_limit_set - Set function for sysfs attribute prb_rsp_limit
 230  * @dev: the &struct device
 231  * @attr: device attributes
 232  * @buf: buffer that contains new attribute value
 233  * @count: size of buffer
 234  */
 235 static ssize_t lbs_prb_rsp_limit_set(struct device *dev,
 236                 struct device_attribute *attr, const char *buf, size_t count)
 237 {
 238         struct lbs_private *priv = to_net_dev(dev)->ml_priv;
 239         struct cmd_ds_mesh_access mesh_access;
 240         int ret;
 241         unsigned long retry_limit;
 242
 243         memset(&mesh_access, 0, sizeof(mesh_access));
 244         mesh_access.data[0] = cpu_to_le32(CMD_ACT_SET);
 245
 246         if (!strict_strtoul(buf, 10, &retry_limit))
 247                 return -ENOTSUPP;
 248         if (retry_limit > 15)
 249                 return -ENOTSUPP;
 250
 251         mesh_access.data[1] = cpu_to_le32(retry_limit);
 252
 253         ret = lbs_mesh_access(priv, CMD_ACT_MESH_SET_GET_PRB_RSP_LIMIT,
 254                         &mesh_access);
 255         if (ret)
 256                 return ret;
 257
 258         return strlen(buf);
 259 }
 260
 261 /**
 262  * lbs_mesh_get - Get function for sysfs attribute mesh
 263  * @dev: the &struct device
 264  * @attr: device attributes
 265  * @buf: buffer where data will be returned
 266  */
 267 static ssize_t lbs_mesh_get(struct device *dev,
 268                 struct device_attribute *attr, char * buf)
 269 {
 270         struct lbs_private *priv = to_net_dev(dev)->ml_priv;
 271         return snprintf(buf, 5, "0x%X\n", !!priv->mesh_dev);
 272 }
 273
 274 /**
 275  * lbs_mesh_set - Set function for sysfs attribute mesh
 276  * @dev: the &struct device
 277  * @attr: device attributes
 278  * @buf: buffer that contains new attribute value
 279  * @count: size of buffer
 280  */
 281 static ssize_t lbs_mesh_set(struct device *dev,
 282                 struct device_attribute *attr, const char * buf, size_t count)
 283 {
 284         struct lbs_private *priv = to_net_dev(dev)->ml_priv;
 285         int enable;
 286
 287         sscanf(buf, "%x", &enable);
 288         enable = !!enable;
 289         if (enable == !!priv->mesh_dev)
 290                 return count;
 291
 292         if (enable)
 293                 lbs_add_mesh(priv);
 294         else
 295                 lbs_remove_mesh(priv);
 296
 297         return count;
 298 }
 299
 300 /*
 301  * lbs_mesh attribute to be exported per ethX interface
 302  * through sysfs (/sys/class/net/ethX/lbs_mesh)
 303  */
 304 static DEVICE_ATTR(lbs_mesh, 0644, lbs_mesh_get, lbs_mesh_set);
 305
 306 /*
 307  * anycast_mask attribute to be exported per mshX interface
 308  * through sysfs (/sys/class/net/mshX/anycast_mask)
 309  */
 310 static DEVICE_ATTR(anycast_mask, 0644, lbs_anycast_get, lbs_anycast_set);
 311
 312 /*
 313  * prb_rsp_limit attribute to be exported per mshX interface
 314  * through sysfs (/sys/class/net/mshX/prb_rsp_limit)
 315  */
 316 static DEVICE_ATTR(prb_rsp_limit, 0644, lbs_prb_rsp_limit_get,
 317                 lbs_prb_rsp_limit_set);
 318
 319 static struct attribute *lbs_mesh_sysfs_entries[] = {
 320         &dev_attr_anycast_mask.attr,
 321         &dev_attr_prb_rsp_limit.attr,
 322         NULL,
 323 };
 324
 325 static const struct attribute_group lbs_mesh_attr_group = {
 326         .attrs = lbs_mesh_sysfs_entries,
 327 };
 328
 329
 330 /***************************************************************************
 331  * Persistent configuration support
 332  */
 333
 334 static int mesh_get_default_parameters(struct device *dev,
 335                                        struct mrvl_mesh_defaults *defs)
 336 {
 337         struct lbs_private *priv = to_net_dev(dev)->ml_priv;
 338         struct cmd_ds_mesh_config cmd;
 339         int ret;
 340
 341         memset(&cmd, 0, sizeof(struct cmd_ds_mesh_config));
 342         ret = lbs_mesh_config_send(priv, &cmd, CMD_ACT_MESH_CONFIG_GET,
 343                                    CMD_TYPE_MESH_GET_DEFAULTS);
 344
 345         if (ret)
 346                 return -EOPNOTSUPP;
 347
 348         memcpy(defs, &cmd.data[0], sizeof(struct mrvl_mesh_defaults));
 349
 350         return 0;
 351 }
 352
 353 /**
 354  * bootflag_get - Get function for sysfs attribute bootflag
 355  * @dev: the &struct device
 356  * @attr: device attributes
 357  * @buf: buffer where data will be returned
 358  */
 359 static ssize_t bootflag_get(struct device *dev,
 360                             struct device_attribute *attr, char *buf)
 361 {
 362         struct mrvl_mesh_defaults defs;
 363         int ret;
 364
 365         ret = mesh_get_default_parameters(dev, &defs);
 366
 367         if (ret)
 368                 return ret;
 369
 370         return snprintf(buf, 12, "%d\n", le32_to_cpu(defs.bootflag));
 371 }
 372
 373 /**
 374  * bootflag_set - Set function for sysfs attribute bootflag
 375  * @dev: the &struct device
 376  * @attr: device attributes
 377  * @buf: buffer that contains new attribute value
 378  * @count: size of buffer
 379  */
 380 static ssize_t bootflag_set(struct device *dev, struct device_attribute *attr,
 381                             const char *buf, size_t count)
 382 {
 383         struct lbs_private *priv = to_net_dev(dev)->ml_priv;
 384         struct cmd_ds_mesh_config cmd;
 385         uint32_t datum;
 386         int ret;
 387
 388         memset(&cmd, 0, sizeof(cmd));
 389         ret = sscanf(buf, "%d", &datum);
 390         if ((ret != 1) || (datum > 1))
 391                 return -EINVAL;
 392
 393         *((__le32 *)&cmd.data[0]) = cpu_to_le32(!!datum);
 394         cmd.length = cpu_to_le16(sizeof(uint32_t));
 395         ret = lbs_mesh_config_send(priv, &cmd, CMD_ACT_MESH_CONFIG_SET,
 396                                    CMD_TYPE_MESH_SET_BOOTFLAG);
 397         if (ret)
 398                 return ret;
 399
 400         return strlen(buf);
 401 }
 402
 403 /**
 404  * boottime_get - Get function for sysfs attribute boottime
 405  * @dev: the &struct device
 406  * @attr: device attributes
 407  * @buf: buffer where data will be returned
 408  */
 409 static ssize_t boottime_get(struct device *dev,
 410                             struct device_attribute *attr, char *buf)
 411 {
 412         struct mrvl_mesh_defaults defs;
 413         int ret;
 414
 415         ret = mesh_get_default_parameters(dev, &defs);
 416
 417         if (ret)
 418                 return ret;
 419
 420         return snprintf(buf, 12, "%d\n", defs.boottime);
 421 }
 422
 423 /**
 424  * boottime_set - Set function for sysfs attribute boottime
 425  * @dev: the &struct device
 426  * @attr: device attributes
 427  * @buf: buffer that contains new attribute value
 428  * @count: size of buffer
 429  */
 430 static ssize_t boottime_set(struct device *dev,
 431                 struct device_attribute *attr, const char *buf, size_t count)
 432 {
 433         struct lbs_private *priv = to_net_dev(dev)->ml_priv;
 434         struct cmd_ds_mesh_config cmd;
 435         uint32_t datum;
 436         int ret;
 437
 438         memset(&cmd, 0, sizeof(cmd));
 439         ret = sscanf(buf, "%d", &datum);
 440         if ((ret != 1) || (datum > 255))
 441                 return -EINVAL;
 442
 443         /* A too small boot time will result in the device booting into
 444          * standalone (no-host) mode before the host can take control of it,
 445          * so the change will be hard to revert.  This may be a desired
 446          * feature (e.g to configure a very fast boot time for devices that
 447          * will not be attached to a host), but dangerous.  So I'm enforcing a
 448          * lower limit of 20 seconds:  remove and recompile the driver if this
 449          * does not work for you.
 450          */
 451         datum = (datum < 20) ? 20 : datum;
 452         cmd.data[0] = datum;
 453         cmd.length = cpu_to_le16(sizeof(uint8_t));
 454         ret = lbs_mesh_config_send(priv, &cmd, CMD_ACT_MESH_CONFIG_SET,
 455                                    CMD_TYPE_MESH_SET_BOOTTIME);
 456         if (ret)
 457                 return ret;
 458
 459         return strlen(buf);
 460 }
 461
 462 /**
 463  * channel_get - Get function for sysfs attribute channel
 464  * @dev: the &struct device
 465  * @attr: device attributes
 466  * @buf: buffer where data will be returned
 467  */
 468 static ssize_t channel_get(struct device *dev,
 469                            struct device_attribute *attr, char *buf)
 470 {
 471         struct mrvl_mesh_defaults defs;
 472         int ret;
 473
 474         ret = mesh_get_default_parameters(dev, &defs);
 475
 476         if (ret)
 477                 return ret;
 478
 479         return snprintf(buf, 12, "%d\n", le16_to_cpu(defs.channel));
 480 }
 481
 482 /**
 483  * channel_set - Set function for sysfs attribute channel
 484  * @dev: the &struct device
 485  * @attr: device attributes
 486  * @buf: buffer that contains new attribute value
 487  * @count: size of buffer
 488  */
 489 static ssize_t channel_set(struct device *dev, struct device_attribute *attr,
 490                            const char *buf, size_t count)
 491 {
 492         struct lbs_private *priv = to_net_dev(dev)->ml_priv;
 493         struct cmd_ds_mesh_config cmd;
 494         uint32_t datum;
 495         int ret;
 496
 497         memset(&cmd, 0, sizeof(cmd));
 498         ret = sscanf(buf, "%d", &datum);
 499         if (ret != 1 || datum < 1 || datum > 11)
 500                 return -EINVAL;
 501
 502         *((__le16 *)&cmd.data[0]) = cpu_to_le16(datum);
 503         cmd.length = cpu_to_le16(sizeof(uint16_t));
 504         ret = lbs_mesh_config_send(priv, &cmd, CMD_ACT_MESH_CONFIG_SET,
 505                                    CMD_TYPE_MESH_SET_DEF_CHANNEL);
 506         if (ret)
 507                 return ret;
 508
 509         return strlen(buf);
 510 }
 511
 512 /**
 513  * mesh_id_get - Get function for sysfs attribute mesh_id
 514  * @dev: the &struct device
 515  * @attr: device attributes
 516  * @buf: buffer where data will be returned
 517  */
 518 static ssize_t mesh_id_get(struct device *dev, struct device_attribute *attr,
 519                            char *buf)
 520 {
 521         struct mrvl_mesh_defaults defs;
 522         int ret;
 523
 524         ret = mesh_get_default_parameters(dev, &defs);
 525
 526         if (ret)
 527                 return ret;
 528
 529         if (defs.meshie.val.mesh_id_len > IEEE80211_MAX_SSID_LEN) {
 530                 dev_err(dev, "inconsistent mesh ID length\n");
 531                 defs.meshie.val.mesh_id_len = IEEE80211_MAX_SSID_LEN;
 532         }
 533
 534         memcpy(buf, defs.meshie.val.mesh_id, defs.meshie.val.mesh_id_len);
 535         buf[defs.meshie.val.mesh_id_len] = '\n';
 536         buf[defs.meshie.val.mesh_id_len + 1] = '\0';
 537
 538         return defs.meshie.val.mesh_id_len + 1;
 539 }
 540
 541 /**
 542  * mesh_id_set - Set function for sysfs attribute mesh_id
 543  * @dev: the &struct device
 544  * @attr: device attributes
 545  * @buf: buffer that contains new attribute value
 546  * @count: size of buffer
 547  */
 548 static ssize_t mesh_id_set(struct device *dev, struct device_attribute *attr,
 549                            const char *buf, size_t count)
 550 {
 551         struct cmd_ds_mesh_config cmd;
 552         struct mrvl_mesh_defaults defs;
 553         struct mrvl_meshie *ie;
 554         struct lbs_private *priv = to_net_dev(dev)->ml_priv;
 555         int len;
 556         int ret;
 557
 558         if (count < 2 || count > IEEE80211_MAX_SSID_LEN + 1)
 559                 return -EINVAL;
 560
 561         memset(&cmd, 0, sizeof(struct cmd_ds_mesh_config));
 562         ie = (struct mrvl_meshie *) &cmd.data[0];
 563
 564         /* fetch all other Information Element parameters */
 565         ret = mesh_get_default_parameters(dev, &defs);
 566
 567         cmd.length = cpu_to_le16(sizeof(struct mrvl_meshie));
 568
 569         /* transfer IE elements */
 570         memcpy(ie, &defs.meshie, sizeof(struct mrvl_meshie));
 571
 572         len = count - 1;
 573         memcpy(ie->val.mesh_id, buf, len);
 574         /* SSID len */
 575         ie->val.mesh_id_len = len;
 576         /* IE len */
 577         ie->len = sizeof(struct mrvl_meshie_val) - IEEE80211_MAX_SSID_LEN + len;
 578
 579         ret = lbs_mesh_config_send(priv, &cmd, CMD_ACT_MESH_CONFIG_SET,
 580                                    CMD_TYPE_MESH_SET_MESH_IE);
 581         if (ret)
 582                 return ret;
 583
 584         return strlen(buf);
 585 }
 586
 587 /**
 588  * protocol_id_get - Get function for sysfs attribute protocol_id
 589  * @dev: the &struct device
 590  * @attr: device attributes
 591  * @buf: buffer where data will be returned
 592  */
 593 static ssize_t protocol_id_get(struct device *dev,
 594                                struct device_attribute *attr, char *buf)
 595 {
 596         struct mrvl_mesh_defaults defs;
 597         int ret;
 598
 599         ret = mesh_get_default_parameters(dev, &defs);
 600
 601         if (ret)
 602                 return ret;
 603
 604         return snprintf(buf, 5, "%d\n", defs.meshie.val.active_protocol_id);
 605 }
 606
 607 /**
 608  * protocol_id_set - Set function for sysfs attribute protocol_id
 609  * @dev: the &struct device
 610  * @attr: device attributes
 611  * @buf: buffer that contains new attribute value
 612  * @count: size of buffer
 613  */
 614 static ssize_t protocol_id_set(struct device *dev,
 615                 struct device_attribute *attr, const char *buf, size_t count)
 616 {
 617         struct cmd_ds_mesh_config cmd;
 618         struct mrvl_mesh_defaults defs;
 619         struct mrvl_meshie *ie;
 620         struct lbs_private *priv = to_net_dev(dev)->ml_priv;
 621         uint32_t datum;
 622         int ret;
 623
 624         memset(&cmd, 0, sizeof(cmd));
 625         ret = sscanf(buf, "%d", &datum);
 626         if ((ret != 1) || (datum > 255))
 627                 return -EINVAL;
 628
 629         /* fetch all other Information Element parameters */
 630         ret = mesh_get_default_parameters(dev, &defs);
 631
 632         cmd.length = cpu_to_le16(sizeof(struct mrvl_meshie));
 633
 634         /* transfer IE elements */
 635         ie = (struct mrvl_meshie *) &cmd.data[0];
 636         memcpy(ie, &defs.meshie, sizeof(struct mrvl_meshie));
 637         /* update protocol id */
 638         ie->val.active_protocol_id = datum;
 639
 640         ret = lbs_mesh_config_send(priv, &cmd, CMD_ACT_MESH_CONFIG_SET,
 641                                    CMD_TYPE_MESH_SET_MESH_IE);
 642         if (ret)
 643                 return ret;
 644
 645         return strlen(buf);
 646 }
 647
 648 /**
 649  * metric_id_get - Get function for sysfs attribute metric_id
 650  * @dev: the &struct device
 651  * @attr: device attributes
 652  * @buf: buffer where data will be returned
 653  */
 654 static ssize_t metric_id_get(struct device *dev,
 655                 struct device_attribute *attr, char *buf)
 656 {
 657         struct mrvl_mesh_defaults defs;
 658         int ret;
 659
 660         ret = mesh_get_default_parameters(dev, &defs);
 661
 662         if (ret)
 663                 return ret;
 664
 665         return snprintf(buf, 5, "%d\n", defs.meshie.val.active_metric_id);
 666 }
 667
 668 /**
 669  * metric_id_set - Set function for sysfs attribute metric_id
 670  * @dev: the &struct device
 671  * @attr: device attributes
 672  * @buf: buffer that contains new attribute value
 673  * @count: size of buffer
 674  */
 675 static ssize_t metric_id_set(struct device *dev, struct device_attribute *attr,
 676                              const char *buf, size_t count)
 677 {
 678         struct cmd_ds_mesh_config cmd;
 679         struct mrvl_mesh_defaults defs;
 680         struct mrvl_meshie *ie;
 681         struct lbs_private *priv = to_net_dev(dev)->ml_priv;
 682         uint32_t datum;
 683         int ret;
 684
 685         memset(&cmd, 0, sizeof(cmd));
 686         ret = sscanf(buf, "%d", &datum);
 687         if ((ret != 1) || (datum > 255))
 688                 return -EINVAL;
 689
 690         /* fetch all other Information Element parameters */
 691         ret = mesh_get_default_parameters(dev, &defs);
 692
 693         cmd.length = cpu_to_le16(sizeof(struct mrvl_meshie));
 694
 695         /* transfer IE elements */
 696         ie = (struct mrvl_meshie *) &cmd.data[0];
 697         memcpy(ie, &defs.meshie, sizeof(struct mrvl_meshie));
 698         /* update metric id */
 699         ie->val.active_metric_id = datum;
 700
 701         ret = lbs_mesh_config_send(priv, &cmd, CMD_ACT_MESH_CONFIG_SET,
 702                                    CMD_TYPE_MESH_SET_MESH_IE);
 703         if (ret)
 704                 return ret;
 705
 706         return strlen(buf);
 707 }
 708
 709 /**
 710  * capability_get - Get function for sysfs attribute capability
 711  * @dev: the &struct device
 712  * @attr: device attributes
 713  * @buf: buffer where data will be returned
 714  */
 715 static ssize_t capability_get(struct device *dev,
 716                 struct device_attribute *attr, char *buf)
 717 {
 718         struct mrvl_mesh_defaults defs;
 719         int ret;
 720
 721         ret = mesh_get_default_parameters(dev, &defs);
 722
 723         if (ret)
 724                 return ret;
 725
 726         return snprintf(buf, 5, "%d\n", defs.meshie.val.mesh_capability);
 727 }
 728
 729 /**
 730  * capability_set - Set function for sysfs attribute capability
 731  * @dev: the &struct device
 732  * @attr: device attributes
 733  * @buf: buffer that contains new attribute value
 734  * @count: size of buffer
 735  */
 736 static ssize_t capability_set(struct device *dev, struct device_attribute *attr,
 737                               const char *buf, size_t count)
 738 {
 739         struct cmd_ds_mesh_config cmd;
 740         struct mrvl_mesh_defaults defs;
 741         struct mrvl_meshie *ie;
 742         struct lbs_private *priv = to_net_dev(dev)->ml_priv;
 743         uint32_t datum;
 744         int ret;
 745
 746         memset(&cmd, 0, sizeof(cmd));
 747         ret = sscanf(buf, "%d", &datum);
 748         if ((ret != 1) || (datum > 255))
 749                 return -EINVAL;
 750
 751         /* fetch all other Information Element parameters */
 752         ret = mesh_get_default_parameters(dev, &defs);
 753
 754         cmd.length = cpu_to_le16(sizeof(struct mrvl_meshie));
 755
 756         /* transfer IE elements */
 757         ie = (struct mrvl_meshie *) &cmd.data[0];
 758         memcpy(ie, &defs.meshie, sizeof(struct mrvl_meshie));
 759         /* update value */
 760         ie->val.mesh_capability = datum;
 761
 762         ret = lbs_mesh_config_send(priv, &cmd, CMD_ACT_MESH_CONFIG_SET,
 763                                    CMD_TYPE_MESH_SET_MESH_IE);
 764         if (ret)
 765                 return ret;
 766
 767         return strlen(buf);
 768 }
 769
 770
 771 static DEVICE_ATTR(bootflag, 0644, bootflag_get, bootflag_set);
 772 static DEVICE_ATTR(boottime, 0644, boottime_get, boottime_set);
 773 static DEVICE_ATTR(channel, 0644, channel_get, channel_set);
 774 static DEVICE_ATTR(mesh_id, 0644, mesh_id_get, mesh_id_set);
 775 static DEVICE_ATTR(protocol_id, 0644, protocol_id_get, protocol_id_set);
 776 static DEVICE_ATTR(metric_id, 0644, metric_id_get, metric_id_set);
 777 static DEVICE_ATTR(capability, 0644, capability_get, capability_set);
 778
 779 static struct attribute *boot_opts_attrs[] = {
 780         &dev_attr_bootflag.attr,
 781         &dev_attr_boottime.attr,
 782         &dev_attr_channel.attr,
 783         NULL
 784 };
 785
 786 static const struct attribute_group boot_opts_group = {
 787         .name = "boot_options",
 788         .attrs = boot_opts_attrs,
 789 };
 790
 791 static struct attribute *mesh_ie_attrs[] = {
 792         &dev_attr_mesh_id.attr,
 793         &dev_attr_protocol_id.attr,
 794         &dev_attr_metric_id.attr,
 795         &dev_attr_capability.attr,
 796         NULL
 797 };
 798
 799 static const struct attribute_group mesh_ie_group = {
 800         .name = "mesh_ie",
 801         .attrs = mesh_ie_attrs,
 802 };
 803
 804 static void lbs_persist_config_init(struct net_device *dev)
 805 {
 806         int ret;
 807         ret = sysfs_create_group(&(dev->dev.kobj), &boot_opts_group);
 808         ret = sysfs_create_group(&(dev->dev.kobj), &mesh_ie_group);
 809 }
 810
 811 static void lbs_persist_config_remove(struct net_device *dev)
 812 {
 813         sysfs_remove_group(&(dev->dev.kobj), &boot_opts_group);
 814         sysfs_remove_group(&(dev->dev.kobj), &mesh_ie_group);
 815 }
 816
 817
 818 /***************************************************************************
 819  * Initializing and starting, stopping mesh
 820  */
 821
 822 /*
 823  * Check mesh FW version and appropriately send the mesh start
 824  * command
 825  */
 826 int lbs_init_mesh(struct lbs_private *priv)
 827 {
 828         int ret = 0;
 829
 830         lbs_deb_enter(LBS_DEB_MESH);
 831
 832         /* Determine mesh_fw_ver from fwrelease and fwcapinfo */
 833         /* 5.0.16p0 9.0.0.p0 is known to NOT support any mesh */
 834         /* 5.110.22 have mesh command with 0xa3 command id */
 835         /* 10.0.0.p0 FW brings in mesh config command with different id */
 836         /* Check FW version MSB and initialize mesh_fw_ver */
 837         if (MRVL_FW_MAJOR_REV(priv->fwrelease) == MRVL_FW_V5) {
 838                 /* Enable mesh, if supported, and work out which TLV it uses.
 839                    0x100 + 291 is an unofficial value used in 5.110.20.pXX
 840                    0x100 + 37 is the official value used in 5.110.21.pXX
 841                    but we check them in that order because 20.pXX doesn't
 842                    give an error -- it just silently fails. */
 843
 844                 /* 5.110.20.pXX firmware will fail the command if the channel
 845                    doesn't match the existing channel. But only if the TLV
 846                    is correct. If the channel is wrong, _BOTH_ versions will
 847                    give an error to 0x100+291, and allow 0x100+37 to succeed.
 848                    It's just that 5.110.20.pXX will not have done anything
 849                    useful */
 850
 851                 priv->mesh_tlv = TLV_TYPE_OLD_MESH_ID;
 852                 if (lbs_mesh_config(priv, CMD_ACT_MESH_CONFIG_START, 1)) {
 853                         priv->mesh_tlv = TLV_TYPE_MESH_ID;
 854                         if (lbs_mesh_config(priv, CMD_ACT_MESH_CONFIG_START, 1))
 855                                 priv->mesh_tlv = 0;
 856                 }
 857         } else
 858         if ((MRVL_FW_MAJOR_REV(priv->fwrelease) >= MRVL_FW_V10) &&
 859                 (priv->fwcapinfo & MESH_CAPINFO_ENABLE_MASK)) {
 860                 /* 10.0.0.pXX new firmwares should succeed with TLV
 861                  * 0x100+37; Do not invoke command with old TLV.
 862                  */
 863                 priv->mesh_tlv = TLV_TYPE_MESH_ID;
 864                 if (lbs_mesh_config(priv, CMD_ACT_MESH_CONFIG_START, 1))
 865                         priv->mesh_tlv = 0;
 866         }
 867
 868         /* Stop meshing until interface is brought up */
 869         lbs_mesh_config(priv, CMD_ACT_MESH_CONFIG_STOP, 1);
 870
 871         if (priv->mesh_tlv) {
 872                 sprintf(priv->mesh_ssid, "mesh");
 873                 priv->mesh_ssid_len = 4;
 874                 ret = 1;
 875         }
 876
 877         lbs_deb_leave_args(LBS_DEB_MESH, "ret %d", ret);
 878         return ret;
 879 }
 880
 881 void lbs_start_mesh(struct lbs_private *priv)
 882 {
 883         lbs_add_mesh(priv);
 884
 885         if (device_create_file(&priv->dev->dev, &dev_attr_lbs_mesh))
 886                 netdev_err(priv->dev, "cannot register lbs_mesh attribute\n");
 887 }
 888
 889 int lbs_deinit_mesh(struct lbs_private *priv)
 890 {
 891         struct net_device *dev = priv->dev;
 892         int ret = 0;
 893
 894         lbs_deb_enter(LBS_DEB_MESH);
 895
 896         if (priv->mesh_tlv) {
 897                 device_remove_file(&dev->dev, &dev_attr_lbs_mesh);
 898                 ret = 1;
 899         }
 900
 901         lbs_deb_leave_args(LBS_DEB_MESH, "ret %d", ret);
 902         return ret;
 903 }
 904
 905
 906 /**
 907  * lbs_mesh_stop - close the mshX interface
 908  *
 909  * @dev:        A pointer to &net_device structure
 910  * returns:     0
 911  */
 912 static int lbs_mesh_stop(struct net_device *dev)
 913 {
 914         struct lbs_private *priv = dev->ml_priv;
 915
 916         lbs_deb_enter(LBS_DEB_MESH);
 917         lbs_mesh_config(priv, CMD_ACT_MESH_CONFIG_STOP,
 918                 lbs_mesh_get_channel(priv));
 919
 920         spin_lock_irq(&priv->driver_lock);
 921
 922         netif_stop_queue(dev);
 923         netif_carrier_off(dev);
 924
 925         spin_unlock_irq(&priv->driver_lock);
 926
 927         lbs_update_mcast(priv);
 928         if (!lbs_iface_active(priv))
 929                 lbs_stop_iface(priv);
 930
 931         lbs_deb_leave(LBS_DEB_MESH);
 932         return 0;
 933 }
 934
 935 /**
 936  * lbs_mesh_dev_open - open the mshX interface
 937  *
 938  * @dev:        A pointer to &net_device structure
 939  * returns:     0 or -EBUSY if monitor mode active
 940  */
 941 static int lbs_mesh_dev_open(struct net_device *dev)
 942 {
 943         struct lbs_private *priv = dev->ml_priv;
 944         int ret = 0;
 945
 946         lbs_deb_enter(LBS_DEB_NET);
 947         if (!priv->iface_running) {
 948                 ret = lbs_start_iface(priv);
 949                 if (ret)
 950                         goto out;
 951         }
 952
 953         spin_lock_irq(&priv->driver_lock);
 954
 955         if (priv->wdev->iftype == NL80211_IFTYPE_MONITOR) {
 956                 ret = -EBUSY;
 957                 spin_unlock_irq(&priv->driver_lock);
 958                 goto out;
 959         }
 960
 961         netif_carrier_on(dev);
 962
 963         if (!priv->tx_pending_len)
 964                 netif_wake_queue(dev);
 965
 966         spin_unlock_irq(&priv->driver_lock);
 967
 968         ret = lbs_mesh_config(priv, CMD_ACT_MESH_CONFIG_START,
 969                 lbs_mesh_get_channel(priv));
 970
 971 out:
 972         lbs_deb_leave_args(LBS_DEB_NET, "ret %d", ret);
 973         return ret;
 974 }
 975
 976 static const struct net_device_ops mesh_netdev_ops = {
 977         .ndo_open               = lbs_mesh_dev_open,
 978         .ndo_stop               = lbs_mesh_stop,
 979         .ndo_start_xmit         = lbs_hard_start_xmit,
 980         .ndo_set_mac_address    = lbs_set_mac_address,
 981         .ndo_set_rx_mode        = lbs_set_multicast_list,
 982 };
 983
 984 /**
 985  * lbs_add_mesh - add mshX interface
 986  *
 987  * @priv:       A pointer to the &struct lbs_private structure
 988  * returns:     0 if successful, -X otherwise
 989  */
 990 static int lbs_add_mesh(struct lbs_private *priv)
 991 {
 992         struct net_device *mesh_dev = NULL;
 993         struct wireless_dev *mesh_wdev;
 994         int ret = 0;
 995
 996         lbs_deb_enter(LBS_DEB_MESH);
 997
 998         /* Allocate a virtual mesh device */
 999         mesh_wdev = kzalloc(sizeof(struct wireless_dev), GFP_KERNEL);
1000         if (!mesh_wdev) {
1001                 lbs_deb_mesh("init mshX wireless device failed\n");
1002                 ret = -ENOMEM;
1003                 goto done;
1004         }
1005
1006         mesh_dev = alloc_netdev(0, "msh%d", ether_setup);
1007         if (!mesh_dev) {
1008                 lbs_deb_mesh("init mshX device failed\n");
1009                 ret = -ENOMEM;
1010                 goto err_free_wdev;
1011         }
1012
1013         mesh_wdev->iftype = NL80211_IFTYPE_MESH_POINT;
1014         mesh_wdev->wiphy = priv->wdev->wiphy;
1015         mesh_wdev->netdev = mesh_dev;
1016
1017         mesh_dev->ml_priv = priv;
1018         mesh_dev->ieee80211_ptr = mesh_wdev;
1019         priv->mesh_dev = mesh_dev;
1020
1021         mesh_dev->netdev_ops = &mesh_netdev_ops;
1022         mesh_dev->ethtool_ops = &lbs_ethtool_ops;
1023         memcpy(mesh_dev->dev_addr, priv->dev->dev_addr, ETH_ALEN);
1024
1025         SET_NETDEV_DEV(priv->mesh_dev, priv->dev->dev.parent);
1026
1027         mesh_dev->flags |= IFF_BROADCAST | IFF_MULTICAST;
1028         /* Register virtual mesh interface */
1029         ret = register_netdev(mesh_dev);
1030         if (ret) {
1031                 pr_err("cannot register mshX virtual interface\n");
1032                 goto err_free_netdev;
1033         }
1034
1035         ret = sysfs_create_group(&(mesh_dev->dev.kobj), &lbs_mesh_attr_group);
1036         if (ret)
1037                 goto err_unregister;
1038
1039         lbs_persist_config_init(mesh_dev);
1040
1041         /* Everything successful */
1042         ret = 0;
1043         goto done;
1044
1045 err_unregister:
1046         unregister_netdev(mesh_dev);
1047
1048 err_free_netdev:
1049         free_netdev(mesh_dev);
1050
1051 err_free_wdev:
1052         kfree(mesh_wdev);
1053
1054 done:
1055         lbs_deb_leave_args(LBS_DEB_MESH, "ret %d", ret);
1056         return ret;
1057 }
1058
1059 void lbs_remove_mesh(struct lbs_private *priv)
1060 {
1061         struct net_device *mesh_dev;
1062
1063         mesh_dev = priv->mesh_dev;
1064         if (!mesh_dev)
1065                 return;
1066
1067         lbs_deb_enter(LBS_DEB_MESH);
1068         netif_stop_queue(mesh_dev);
1069         netif_carrier_off(mesh_dev);
1070         sysfs_remove_group(&(mesh_dev->dev.kobj), &lbs_mesh_attr_group);
1071         lbs_persist_config_remove(mesh_dev);
1072         unregister_netdev(mesh_dev);
1073         priv->mesh_dev = NULL;
1074         kfree(mesh_dev->ieee80211_ptr);
1075         free_netdev(mesh_dev);
1076         lbs_deb_leave(LBS_DEB_MESH);
1077 }
1078
1079
1080 /***************************************************************************
1081  * Sending and receiving
1082  */
1083 struct net_device *lbs_mesh_set_dev(struct lbs_private *priv,
1084         struct net_device *dev, struct rxpd *rxpd)
1085 {
1086         if (priv->mesh_dev) {
1087                 if (priv->mesh_tlv == TLV_TYPE_OLD_MESH_ID) {
1088                         if (rxpd->rx_control & RxPD_MESH_FRAME)
1089                                 dev = priv->mesh_dev;
1090                 } else if (priv->mesh_tlv == TLV_TYPE_MESH_ID) {
1091                         if (rxpd->u.bss.bss_num == MESH_IFACE_ID)
1092                                 dev = priv->mesh_dev;
1093                 }
1094         }
1095         return dev;
1096 }
1097
1098
1099 void lbs_mesh_set_txpd(struct lbs_private *priv,
1100         struct net_device *dev, struct txpd *txpd)
1101 {
1102         if (dev == priv->mesh_dev) {
1103                 if (priv->mesh_tlv == TLV_TYPE_OLD_MESH_ID)
1104                         txpd->tx_control |= cpu_to_le32(TxPD_MESH_FRAME);
1105                 else if (priv->mesh_tlv == TLV_TYPE_MESH_ID)
1106                         txpd->u.bss.bss_num = MESH_IFACE_ID;
1107         }
1108 }
1109
1110
1111 /***************************************************************************
1112  * Ethtool related
1113  */
1114
1115 static const char * const mesh_stat_strings[] = {
1116                         "drop_duplicate_bcast",
1117                         "drop_ttl_zero",
1118                         "drop_no_fwd_route",
1119                         "drop_no_buffers",
1120                         "fwded_unicast_cnt",
1121                         "fwded_bcast_cnt",
1122                         "drop_blind_table",
1123                         "tx_failed_cnt"
1124 };
1125
1126 void lbs_mesh_ethtool_get_stats(struct net_device *dev,
1127         struct ethtool_stats *stats, uint64_t *data)
1128 {
1129         struct lbs_private *priv = dev->ml_priv;
1130         struct cmd_ds_mesh_access mesh_access;
1131         int ret;
1132
1133         lbs_deb_enter(LBS_DEB_ETHTOOL);
1134
1135         /* Get Mesh Statistics */
1136         ret = lbs_mesh_access(priv, CMD_ACT_MESH_GET_STATS, &mesh_access);
1137
1138         if (ret) {
1139                 memset(data, 0, MESH_STATS_NUM*(sizeof(uint64_t)));
1140                 return;
1141         }
1142
1143         priv->mstats.fwd_drop_rbt = le32_to_cpu(mesh_access.data[0]);
1144         priv->mstats.fwd_drop_ttl = le32_to_cpu(mesh_access.data[1]);
1145         priv->mstats.fwd_drop_noroute = le32_to_cpu(mesh_access.data[2]);
1146         priv->mstats.fwd_drop_nobuf = le32_to_cpu(mesh_access.data[3]);
1147         priv->mstats.fwd_unicast_cnt = le32_to_cpu(mesh_access.data[4]);
1148         priv->mstats.fwd_bcast_cnt = le32_to_cpu(mesh_access.data[5]);
1149         priv->mstats.drop_blind = le32_to_cpu(mesh_access.data[6]);
1150         priv->mstats.tx_failed_cnt = le32_to_cpu(mesh_access.data[7]);
1151
1152         data[0] = priv->mstats.fwd_drop_rbt;
1153         data[1] = priv->mstats.fwd_drop_ttl;
1154         data[2] = priv->mstats.fwd_drop_noroute;
1155         data[3] = priv->mstats.fwd_drop_nobuf;
1156         data[4] = priv->mstats.fwd_unicast_cnt;
1157         data[5] = priv->mstats.fwd_bcast_cnt;
1158         data[6] = priv->mstats.drop_blind;
1159         data[7] = priv->mstats.tx_failed_cnt;
1160
1161         lbs_deb_enter(LBS_DEB_ETHTOOL);
1162 }
1163
1164 int lbs_mesh_ethtool_get_sset_count(struct net_device *dev, int sset)
1165 {
1166         struct lbs_private *priv = dev->ml_priv;
1167
1168         if (sset == ETH_SS_STATS && dev == priv->mesh_dev)
1169                 return MESH_STATS_NUM;
1170
1171         return -EOPNOTSUPP;
1172 }
1173
1174 void lbs_mesh_ethtool_get_strings(struct net_device *dev,
1175         uint32_t stringset, uint8_t *s)
1176 {
1177         int i;
1178
1179         lbs_deb_enter(LBS_DEB_ETHTOOL);
1180
1181         switch (stringset) {
1182         case ETH_SS_STATS:
1183                 for (i = 0; i < MESH_STATS_NUM; i++) {
1184                         memcpy(s + i * ETH_GSTRING_LEN,
1185                                         mesh_stat_strings[i],
1186                                         ETH_GSTRING_LEN);
1187                 }
1188                 break;
1189         }
1190         lbs_deb_enter(LBS_DEB_ETHTOOL);
1191 }