drivers/net/wireless/mwifiex/uap_cmd.c

   1 /*
   2  * Marvell Wireless LAN device driver: AP specific command handling
   3  *
   4  * Copyright (C) 2012, Marvell International Ltd.
   5  *
   6  * This software file (the "File") is distributed by Marvell International
   7  * Ltd. under the terms of the GNU General Public License Version 2, June 1991
   8  * (the "License").  You may use, redistribute and/or modify this File in
   9  * accordance with the terms and conditions of the License, a copy of which
  10  * is available by writing to the Free Software Foundation, Inc.,
  11  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA or on the
  12  * worldwide web at http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt.
  13  *
  14  * THE FILE IS DISTRIBUTED AS-IS, WITHOUT WARRANTY OF ANY KIND, AND THE
  15  * IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE
  16  * ARE EXPRESSLY DISCLAIMED.  The License provides additional details about
  17  * this warranty disclaimer.
  18  */
  19
  20 #include "main.h"
  21
  22 /* This function parses security related parameters from cfg80211_ap_settings
  23  * and sets into FW understandable bss_config structure.
  24  */
  25 int mwifiex_set_secure_params(struct mwifiex_private *priv,
  26                               struct mwifiex_uap_bss_param *bss_config,
  27                               struct cfg80211_ap_settings *params) {
  28         int i;
  29
  30         switch (params->auth_type) {
  31         case NL80211_AUTHTYPE_OPEN_SYSTEM:
  32                 bss_config->auth_mode = WLAN_AUTH_OPEN;
  33                 break;
  34         case NL80211_AUTHTYPE_SHARED_KEY:
  35                 bss_config->auth_mode = WLAN_AUTH_SHARED_KEY;
  36                 break;
  37         case NL80211_AUTHTYPE_NETWORK_EAP:
  38                 bss_config->auth_mode = WLAN_AUTH_LEAP;
  39                 break;
  40         default:
  41                 bss_config->auth_mode = MWIFIEX_AUTH_MODE_AUTO;
  42                 break;
  43         }
  44
  45         bss_config->key_mgmt_operation |= KEY_MGMT_ON_HOST;
  46
  47         for (i = 0; i < params->crypto.n_akm_suites; i++) {
  48                 switch (params->crypto.akm_suites[i]) {
  49                 case WLAN_AKM_SUITE_8021X:
  50                         if (params->crypto.wpa_versions &
  51                             NL80211_WPA_VERSION_1) {
  52                                 bss_config->protocol = PROTOCOL_WPA;
  53                                 bss_config->key_mgmt = KEY_MGMT_EAP;
  54                         }
  55                         if (params->crypto.wpa_versions &
  56                             NL80211_WPA_VERSION_2) {
  57                                 bss_config->protocol = PROTOCOL_WPA2;
  58                                 bss_config->key_mgmt = KEY_MGMT_EAP;
  59                         }
  60                         break;
  61                 case WLAN_AKM_SUITE_PSK:
  62                         if (params->crypto.wpa_versions &
  63                             NL80211_WPA_VERSION_1) {
  64                                 bss_config->protocol = PROTOCOL_WPA;
  65                                 bss_config->key_mgmt = KEY_MGMT_PSK;
  66                         }
  67                         if (params->crypto.wpa_versions &
  68                             NL80211_WPA_VERSION_2) {
  69                                 bss_config->protocol = PROTOCOL_WPA2;
  70                                 bss_config->key_mgmt = KEY_MGMT_PSK;
  71                         }
  72                         break;
  73                 default:
  74                         break;
  75                 }
  76         }
  77         for (i = 0; i < params->crypto.n_ciphers_pairwise; i++) {
  78                 switch (params->crypto.ciphers_pairwise[i]) {
  79                 case WLAN_CIPHER_SUITE_WEP40:
  80                 case WLAN_CIPHER_SUITE_WEP104:
  81                         break;
  82                 case WLAN_CIPHER_SUITE_TKIP:
  83                         bss_config->wpa_cfg.pairwise_cipher_wpa = CIPHER_TKIP;
  84                         break;
  85                 case WLAN_CIPHER_SUITE_CCMP:
  86                         bss_config->wpa_cfg.pairwise_cipher_wpa2 =
  87                                                                 CIPHER_AES_CCMP;
  88                 default:
  89                         break;
  90                 }
  91         }
  92
  93         switch (params->crypto.cipher_group) {
  94         case WLAN_CIPHER_SUITE_WEP40:
  95         case WLAN_CIPHER_SUITE_WEP104:
  96                 break;
  97         case WLAN_CIPHER_SUITE_TKIP:
  98                 bss_config->wpa_cfg.group_cipher = CIPHER_TKIP;
  99                 break;
 100         case WLAN_CIPHER_SUITE_CCMP:
 101                 bss_config->wpa_cfg.group_cipher = CIPHER_AES_CCMP;
 102                 break;
 103         default:
 104                 break;
 105         }
 106
 107         return 0;
 108 }
 109
 110 /* This function initializes some of mwifiex_uap_bss_param variables.
 111  * This helps FW in ignoring invalid values. These values may or may not
 112  * be get updated to valid ones at later stage.
 113  */
 114 void mwifiex_set_sys_config_invalid_data(struct mwifiex_uap_bss_param *config)
 115 {
 116         config->bcast_ssid_ctl = 0x7F;
 117         config->radio_ctl = 0x7F;
 118         config->dtim_period = 0x7F;
 119         config->beacon_period = 0x7FFF;
 120         config->auth_mode = 0x7F;
 121         config->rts_threshold = 0x7FFF;
 122         config->frag_threshold = 0x7FFF;
 123         config->retry_limit = 0x7F;
 124 }
 125
 126 /* This function parses BSS related parameters from structure
 127  * and prepares TLVs. These TLVs are appended to command buffer.
 128 */
 129 static int
 130 mwifiex_uap_bss_param_prepare(u8 *tlv, void *cmd_buf, u16 *param_size)
 131 {
 132         struct host_cmd_tlv_dtim_period *dtim_period;
 133         struct host_cmd_tlv_beacon_period *beacon_period;
 134         struct host_cmd_tlv_ssid *ssid;
 135         struct host_cmd_tlv_bcast_ssid *bcast_ssid;
 136         struct host_cmd_tlv_channel_band *chan_band;
 137         struct host_cmd_tlv_frag_threshold *frag_threshold;
 138         struct host_cmd_tlv_rts_threshold *rts_threshold;
 139         struct host_cmd_tlv_retry_limit *retry_limit;
 140         struct host_cmd_tlv_pwk_cipher *pwk_cipher;
 141         struct host_cmd_tlv_gwk_cipher *gwk_cipher;
 142         struct host_cmd_tlv_encrypt_protocol *encrypt_protocol;
 143         struct host_cmd_tlv_auth_type *auth_type;
 144         struct host_cmd_tlv_passphrase *passphrase;
 145         struct host_cmd_tlv_akmp *tlv_akmp;
 146         struct mwifiex_uap_bss_param *bss_cfg = cmd_buf;
 147         u16 cmd_size = *param_size;
 148
 149         if (bss_cfg->ssid.ssid_len) {
 150                 ssid = (struct host_cmd_tlv_ssid *)tlv;
 151                 ssid->tlv.type = cpu_to_le16(TLV_TYPE_UAP_SSID);
 152                 ssid->tlv.len = cpu_to_le16((u16)bss_cfg->ssid.ssid_len);
 153                 memcpy(ssid->ssid, bss_cfg->ssid.ssid, bss_cfg->ssid.ssid_len);
 154                 cmd_size += sizeof(struct host_cmd_tlv) +
 155                             bss_cfg->ssid.ssid_len;
 156                 tlv += sizeof(struct host_cmd_tlv) + bss_cfg->ssid.ssid_len;
 157
 158                 bcast_ssid = (struct host_cmd_tlv_bcast_ssid *)tlv;
 159                 bcast_ssid->tlv.type = cpu_to_le16(TLV_TYPE_UAP_BCAST_SSID);
 160                 bcast_ssid->tlv.len =
 161                                 cpu_to_le16(sizeof(bcast_ssid->bcast_ctl));
 162                 bcast_ssid->bcast_ctl = bss_cfg->bcast_ssid_ctl;
 163                 cmd_size += sizeof(struct host_cmd_tlv_bcast_ssid);
 164                 tlv += sizeof(struct host_cmd_tlv_bcast_ssid);
 165         }
 166         if (bss_cfg->channel && bss_cfg->channel <= MAX_CHANNEL_BAND_BG) {
 167                 chan_band = (struct host_cmd_tlv_channel_band *)tlv;
 168                 chan_band->tlv.type = cpu_to_le16(TLV_TYPE_CHANNELBANDLIST);
 169                 chan_band->tlv.len =
 170                         cpu_to_le16(sizeof(struct host_cmd_tlv_channel_band) -
 171                                     sizeof(struct host_cmd_tlv));
 172                 chan_band->band_config = bss_cfg->band_cfg;
 173                 chan_band->channel = bss_cfg->channel;
 174                 cmd_size += sizeof(struct host_cmd_tlv_channel_band);
 175                 tlv += sizeof(struct host_cmd_tlv_channel_band);
 176         }
 177         if (bss_cfg->beacon_period >= MIN_BEACON_PERIOD &&
 178             bss_cfg->beacon_period <= MAX_BEACON_PERIOD) {
 179                 beacon_period = (struct host_cmd_tlv_beacon_period *)tlv;
 180                 beacon_period->tlv.type =
 181                                         cpu_to_le16(TLV_TYPE_UAP_BEACON_PERIOD);
 182                 beacon_period->tlv.len =
 183                         cpu_to_le16(sizeof(struct host_cmd_tlv_beacon_period) -
 184                                     sizeof(struct host_cmd_tlv));
 185                 beacon_period->period = cpu_to_le16(bss_cfg->beacon_period);
 186                 cmd_size += sizeof(struct host_cmd_tlv_beacon_period);
 187                 tlv += sizeof(struct host_cmd_tlv_beacon_period);
 188         }
 189         if (bss_cfg->dtim_period >= MIN_DTIM_PERIOD &&
 190             bss_cfg->dtim_period <= MAX_DTIM_PERIOD) {
 191                 dtim_period = (struct host_cmd_tlv_dtim_period *)tlv;
 192                 dtim_period->tlv.type = cpu_to_le16(TLV_TYPE_UAP_DTIM_PERIOD);
 193                 dtim_period->tlv.len =
 194                         cpu_to_le16(sizeof(struct host_cmd_tlv_dtim_period) -
 195                                     sizeof(struct host_cmd_tlv));
 196                 dtim_period->period = bss_cfg->dtim_period;
 197                 cmd_size += sizeof(struct host_cmd_tlv_dtim_period);
 198                 tlv += sizeof(struct host_cmd_tlv_dtim_period);
 199         }
 200         if (bss_cfg->rts_threshold <= MWIFIEX_RTS_MAX_VALUE) {
 201                 rts_threshold = (struct host_cmd_tlv_rts_threshold *)tlv;
 202                 rts_threshold->tlv.type =
 203                                         cpu_to_le16(TLV_TYPE_UAP_RTS_THRESHOLD);
 204                 rts_threshold->tlv.len =
 205                         cpu_to_le16(sizeof(struct host_cmd_tlv_rts_threshold) -
 206                                     sizeof(struct host_cmd_tlv));
 207                 rts_threshold->rts_thr = cpu_to_le16(bss_cfg->rts_threshold);
 208                 cmd_size += sizeof(struct host_cmd_tlv_frag_threshold);
 209                 tlv += sizeof(struct host_cmd_tlv_frag_threshold);
 210         }
 211         if ((bss_cfg->frag_threshold >= MWIFIEX_FRAG_MIN_VALUE) &&
 212             (bss_cfg->frag_threshold <= MWIFIEX_FRAG_MAX_VALUE)) {
 213                 frag_threshold = (struct host_cmd_tlv_frag_threshold *)tlv;
 214                 frag_threshold->tlv.type =
 215                                 cpu_to_le16(TLV_TYPE_UAP_FRAG_THRESHOLD);
 216                 frag_threshold->tlv.len =
 217                         cpu_to_le16(sizeof(struct host_cmd_tlv_frag_threshold) -
 218                                     sizeof(struct host_cmd_tlv));
 219                 frag_threshold->frag_thr = cpu_to_le16(bss_cfg->frag_threshold);
 220                 cmd_size += sizeof(struct host_cmd_tlv_frag_threshold);
 221                 tlv += sizeof(struct host_cmd_tlv_frag_threshold);
 222         }
 223         if (bss_cfg->retry_limit <= MWIFIEX_RETRY_LIMIT) {
 224                 retry_limit = (struct host_cmd_tlv_retry_limit *)tlv;
 225                 retry_limit->tlv.type = cpu_to_le16(TLV_TYPE_UAP_RETRY_LIMIT);
 226                 retry_limit->tlv.len =
 227                         cpu_to_le16(sizeof(struct host_cmd_tlv_retry_limit) -
 228                                     sizeof(struct host_cmd_tlv));
 229                 retry_limit->limit = (u8)bss_cfg->retry_limit;
 230                 cmd_size += sizeof(struct host_cmd_tlv_retry_limit);
 231                 tlv += sizeof(struct host_cmd_tlv_retry_limit);
 232         }
 233         if ((bss_cfg->protocol & PROTOCOL_WPA) ||
 234             (bss_cfg->protocol & PROTOCOL_WPA2) ||
 235             (bss_cfg->protocol & PROTOCOL_EAP)) {
 236                 tlv_akmp = (struct host_cmd_tlv_akmp *)tlv;
 237                 tlv_akmp->tlv.type = cpu_to_le16(TLV_TYPE_UAP_AKMP);
 238                 tlv_akmp->tlv.len =
 239                     cpu_to_le16(sizeof(struct host_cmd_tlv_akmp) -
 240                                 sizeof(struct host_cmd_tlv));
 241                 tlv_akmp->key_mgmt_operation =
 242                         cpu_to_le16(bss_cfg->key_mgmt_operation);
 243                 tlv_akmp->key_mgmt = cpu_to_le16(bss_cfg->key_mgmt);
 244                 cmd_size += sizeof(struct host_cmd_tlv_akmp);
 245                 tlv += sizeof(struct host_cmd_tlv_akmp);
 246
 247                 if (bss_cfg->wpa_cfg.pairwise_cipher_wpa &
 248                                 VALID_CIPHER_BITMAP) {
 249                         pwk_cipher = (struct host_cmd_tlv_pwk_cipher *)tlv;
 250                         pwk_cipher->tlv.type =
 251                                 cpu_to_le16(TLV_TYPE_PWK_CIPHER);
 252                         pwk_cipher->tlv.len = cpu_to_le16(
 253                                 sizeof(struct host_cmd_tlv_pwk_cipher) -
 254                                 sizeof(struct host_cmd_tlv));
 255                         pwk_cipher->proto = cpu_to_le16(PROTOCOL_WPA);
 256                         pwk_cipher->cipher =
 257                                 bss_cfg->wpa_cfg.pairwise_cipher_wpa;
 258                         cmd_size += sizeof(struct host_cmd_tlv_pwk_cipher);
 259                         tlv += sizeof(struct host_cmd_tlv_pwk_cipher);
 260                 }
 261                 if (bss_cfg->wpa_cfg.pairwise_cipher_wpa2 &
 262                                 VALID_CIPHER_BITMAP) {
 263                         pwk_cipher = (struct host_cmd_tlv_pwk_cipher *)tlv;
 264                         pwk_cipher->tlv.type = cpu_to_le16(TLV_TYPE_PWK_CIPHER);
 265                         pwk_cipher->tlv.len = cpu_to_le16(
 266                                 sizeof(struct host_cmd_tlv_pwk_cipher) -
 267                                 sizeof(struct host_cmd_tlv));
 268                         pwk_cipher->proto = cpu_to_le16(PROTOCOL_WPA2);
 269                         pwk_cipher->cipher =
 270                                 bss_cfg->wpa_cfg.pairwise_cipher_wpa2;
 271                         cmd_size += sizeof(struct host_cmd_tlv_pwk_cipher);
 272                         tlv += sizeof(struct host_cmd_tlv_pwk_cipher);
 273                 }
 274                 if (bss_cfg->wpa_cfg.group_cipher & VALID_CIPHER_BITMAP) {
 275                         gwk_cipher = (struct host_cmd_tlv_gwk_cipher *)tlv;
 276                         gwk_cipher->tlv.type = cpu_to_le16(TLV_TYPE_GWK_CIPHER);
 277                         gwk_cipher->tlv.len = cpu_to_le16(
 278                                 sizeof(struct host_cmd_tlv_gwk_cipher) -
 279                                 sizeof(struct host_cmd_tlv));
 280                         gwk_cipher->cipher = bss_cfg->wpa_cfg.group_cipher;
 281                         cmd_size += sizeof(struct host_cmd_tlv_gwk_cipher);
 282                         tlv += sizeof(struct host_cmd_tlv_gwk_cipher);
 283                 }
 284                 if (bss_cfg->wpa_cfg.length) {
 285                         passphrase = (struct host_cmd_tlv_passphrase *)tlv;
 286                         passphrase->tlv.type =
 287                                 cpu_to_le16(TLV_TYPE_UAP_WPA_PASSPHRASE);
 288                         passphrase->tlv.len =
 289                                 cpu_to_le16(bss_cfg->wpa_cfg.length);
 290                         memcpy(passphrase->passphrase,
 291                                bss_cfg->wpa_cfg.passphrase,
 292                                bss_cfg->wpa_cfg.length);
 293                         cmd_size += sizeof(struct host_cmd_tlv) +
 294                                     bss_cfg->wpa_cfg.length;
 295                         tlv += sizeof(struct host_cmd_tlv) +
 296                                bss_cfg->wpa_cfg.length;
 297                 }
 298         }
 299         if ((bss_cfg->auth_mode <= WLAN_AUTH_SHARED_KEY) ||
 300             (bss_cfg->auth_mode == MWIFIEX_AUTH_MODE_AUTO)) {
 301                 auth_type = (struct host_cmd_tlv_auth_type *)tlv;
 302                 auth_type->tlv.type = cpu_to_le16(TLV_TYPE_AUTH_TYPE);
 303                 auth_type->tlv.len =
 304                         cpu_to_le16(sizeof(struct host_cmd_tlv_auth_type) -
 305                         sizeof(struct host_cmd_tlv));
 306                 auth_type->auth_type = (u8)bss_cfg->auth_mode;
 307                 cmd_size += sizeof(struct host_cmd_tlv_auth_type);
 308                 tlv += sizeof(struct host_cmd_tlv_auth_type);
 309         }
 310         if (bss_cfg->protocol) {
 311                 encrypt_protocol = (struct host_cmd_tlv_encrypt_protocol *)tlv;
 312                 encrypt_protocol->tlv.type =
 313                         cpu_to_le16(TLV_TYPE_UAP_ENCRY_PROTOCOL);
 314                 encrypt_protocol->tlv.len =
 315                         cpu_to_le16(sizeof(struct host_cmd_tlv_encrypt_protocol)
 316                         - sizeof(struct host_cmd_tlv));
 317                 encrypt_protocol->proto = cpu_to_le16(bss_cfg->protocol);
 318                 cmd_size += sizeof(struct host_cmd_tlv_encrypt_protocol);
 319                 tlv += sizeof(struct host_cmd_tlv_encrypt_protocol);
 320         }
 321
 322         *param_size = cmd_size;
 323
 324         return 0;
 325 }
 326
 327 /* This function parses custom IEs from IE list and prepares command buffer */
 328 static int mwifiex_uap_custom_ie_prepare(u8 *tlv, void *cmd_buf, u16 *ie_size)
 329 {
 330         struct mwifiex_ie_list *ap_ie = cmd_buf;
 331         struct host_cmd_tlv *tlv_ie = (struct host_cmd_tlv *)tlv;
 332
 333         if (!ap_ie || !ap_ie->len || !ap_ie->ie_list)
 334                 return -1;
 335
 336         *ie_size += le16_to_cpu(ap_ie->len) + sizeof(struct host_cmd_tlv);
 337
 338         tlv_ie->type = cpu_to_le16(TLV_TYPE_MGMT_IE);
 339         tlv_ie->len = ap_ie->len;
 340         tlv += sizeof(struct host_cmd_tlv);
 341
 342         memcpy(tlv, ap_ie->ie_list, le16_to_cpu(ap_ie->len));
 343
 344         return 0;
 345 }
 346
 347 /* Parse AP config structure and prepare TLV based command structure
 348  * to be sent to FW for uAP configuration
 349  */
 350 static int
 351 mwifiex_cmd_uap_sys_config(struct host_cmd_ds_command *cmd, u16 cmd_action,
 352                            u32 type, void *cmd_buf)
 353 {
 354         u8 *tlv;
 355         u16 cmd_size, param_size, ie_size;
 356         struct host_cmd_ds_sys_config *sys_cfg;
 357
 358         cmd->command = cpu_to_le16(HostCmd_CMD_UAP_SYS_CONFIG);
 359         cmd_size = (u16)(sizeof(struct host_cmd_ds_sys_config) + S_DS_GEN);
 360         sys_cfg = (struct host_cmd_ds_sys_config *)&cmd->params.uap_sys_config;
 361         sys_cfg->action = cpu_to_le16(cmd_action);
 362         tlv = sys_cfg->tlv;
 363
 364         switch (type) {
 365         case UAP_BSS_PARAMS_I:
 366                 param_size = cmd_size;
 367                 if (mwifiex_uap_bss_param_prepare(tlv, cmd_buf, &param_size))
 368                         return -1;
 369                 cmd->size = cpu_to_le16(param_size);
 370                 break;
 371         case UAP_CUSTOM_IE_I:
 372                 ie_size = cmd_size;
 373                 if (mwifiex_uap_custom_ie_prepare(tlv, cmd_buf, &ie_size))
 374                         return -1;
 375                 cmd->size = cpu_to_le16(ie_size);
 376                 break;
 377         default:
 378                 return -1;
 379         }
 380
 381         return 0;
 382 }
 383
 384 /* This function prepares the AP specific commands before sending them
 385  * to the firmware.
 386  * This is a generic function which calls specific command preparation
 387  * routines based upon the command number.
 388  */
 389 int mwifiex_uap_prepare_cmd(struct mwifiex_private *priv, u16 cmd_no,
 390                             u16 cmd_action, u32 type,
 391                             void *data_buf, void *cmd_buf)
 392 {
 393         struct host_cmd_ds_command *cmd = cmd_buf;
 394
 395         switch (cmd_no) {
 396         case HostCmd_CMD_UAP_SYS_CONFIG:
 397                 if (mwifiex_cmd_uap_sys_config(cmd, cmd_action, type, data_buf))
 398                         return -1;
 399                 break;
 400         case HostCmd_CMD_UAP_BSS_START:
 401         case HostCmd_CMD_UAP_BSS_STOP:
 402                 cmd->command = cpu_to_le16(cmd_no);
 403                 cmd->size = cpu_to_le16(S_DS_GEN);
 404                 break;
 405         default:
 406                 dev_err(priv->adapter->dev,
 407                         "PREP_CMD: unknown cmd %#x\n", cmd_no);
 408                 return -1;
 409         }
 410
 411         return 0;
 412 }
 413
 414 /* This function sets the RF channel for AP.
 415  *
 416  * This function populates channel information in AP config structure
 417  * and sends command to configure channel information in AP.
 418  */
 419 int mwifiex_uap_set_channel(struct mwifiex_private *priv, int channel)
 420 {
 421         struct mwifiex_uap_bss_param *bss_cfg;
 422         struct wiphy *wiphy = priv->wdev->wiphy;
 423
 424         bss_cfg = kzalloc(sizeof(struct mwifiex_uap_bss_param), GFP_KERNEL);
 425         if (!bss_cfg)
 426                 return -ENOMEM;
 427
 428         mwifiex_set_sys_config_invalid_data(bss_cfg);
 429         bss_cfg->band_cfg = BAND_CONFIG_MANUAL;
 430         bss_cfg->channel = channel;
 431
 432         if (mwifiex_send_cmd_async(priv, HostCmd_CMD_UAP_SYS_CONFIG,
 433                                    HostCmd_ACT_GEN_SET,
 434                                    UAP_BSS_PARAMS_I, bss_cfg)) {
 435                 wiphy_err(wiphy, "Failed to set the uAP channel\n");
 436                 kfree(bss_cfg);
 437                 return -1;
 438         }
 439
 440         kfree(bss_cfg);
 441         return 0;
 442 }