linux/drivers/net/wireless/intel/iwlwifi/dvm/lib.c
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   1// SPDX-License-Identifier: GPL-2.0-only
   2/******************************************************************************
   3 *
   4 * Copyright(c) 2008 - 2014 Intel Corporation. All rights reserved.
   5 *
   6 * Contact Information:
   7 *  Intel Linux Wireless <linuxwifi@intel.com>
   8 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
   9 *
  10 *****************************************************************************/
  11#include <linux/etherdevice.h>
  12#include <linux/kernel.h>
  13#include <linux/module.h>
  14#include <linux/sched.h>
  15#include <net/mac80211.h>
  16
  17#include "iwl-io.h"
  18#include "iwl-agn-hw.h"
  19#include "iwl-trans.h"
  20#include "iwl-modparams.h"
  21
  22#include "dev.h"
  23#include "agn.h"
  24
  25int iwlagn_hw_valid_rtc_data_addr(u32 addr)
  26{
  27        return (addr >= IWLAGN_RTC_DATA_LOWER_BOUND) &&
  28                (addr < IWLAGN_RTC_DATA_UPPER_BOUND);
  29}
  30
  31int iwlagn_send_tx_power(struct iwl_priv *priv)
  32{
  33        struct iwlagn_tx_power_dbm_cmd tx_power_cmd;
  34        u8 tx_ant_cfg_cmd;
  35
  36        if (WARN_ONCE(test_bit(STATUS_SCAN_HW, &priv->status),
  37                      "TX Power requested while scanning!\n"))
  38                return -EAGAIN;
  39
  40        /* half dBm need to multiply */
  41        tx_power_cmd.global_lmt = (s8)(2 * priv->tx_power_user_lmt);
  42
  43        if (tx_power_cmd.global_lmt > priv->nvm_data->max_tx_pwr_half_dbm) {
  44                /*
  45                 * For the newer devices which using enhanced/extend tx power
  46                 * table in EEPROM, the format is in half dBm. driver need to
  47                 * convert to dBm format before report to mac80211.
  48                 * By doing so, there is a possibility of 1/2 dBm resolution
  49                 * lost. driver will perform "round-up" operation before
  50                 * reporting, but it will cause 1/2 dBm tx power over the
  51                 * regulatory limit. Perform the checking here, if the
  52                 * "tx_power_user_lmt" is higher than EEPROM value (in
  53                 * half-dBm format), lower the tx power based on EEPROM
  54                 */
  55                tx_power_cmd.global_lmt =
  56                        priv->nvm_data->max_tx_pwr_half_dbm;
  57        }
  58        tx_power_cmd.flags = IWLAGN_TX_POWER_NO_CLOSED;
  59        tx_power_cmd.srv_chan_lmt = IWLAGN_TX_POWER_AUTO;
  60
  61        if (IWL_UCODE_API(priv->fw->ucode_ver) == 1)
  62                tx_ant_cfg_cmd = REPLY_TX_POWER_DBM_CMD_V1;
  63        else
  64                tx_ant_cfg_cmd = REPLY_TX_POWER_DBM_CMD;
  65
  66        return iwl_dvm_send_cmd_pdu(priv, tx_ant_cfg_cmd, 0,
  67                        sizeof(tx_power_cmd), &tx_power_cmd);
  68}
  69
  70void iwlagn_temperature(struct iwl_priv *priv)
  71{
  72        lockdep_assert_held(&priv->statistics.lock);
  73
  74        /* store temperature from correct statistics (in Celsius) */
  75        priv->temperature = le32_to_cpu(priv->statistics.common.temperature);
  76        iwl_tt_handler(priv);
  77}
  78
  79int iwlagn_hwrate_to_mac80211_idx(u32 rate_n_flags, enum nl80211_band band)
  80{
  81        int idx = 0;
  82        int band_offset = 0;
  83
  84        /* HT rate format: mac80211 wants an MCS number, which is just LSB */
  85        if (rate_n_flags & RATE_MCS_HT_MSK) {
  86                idx = (rate_n_flags & 0xff);
  87                return idx;
  88        /* Legacy rate format, search for match in table */
  89        } else {
  90                if (band == NL80211_BAND_5GHZ)
  91                        band_offset = IWL_FIRST_OFDM_RATE;
  92                for (idx = band_offset; idx < IWL_RATE_COUNT_LEGACY; idx++)
  93                        if (iwl_rates[idx].plcp == (rate_n_flags & 0xFF))
  94                                return idx - band_offset;
  95        }
  96
  97        return -1;
  98}
  99
 100int iwlagn_manage_ibss_station(struct iwl_priv *priv,
 101                               struct ieee80211_vif *vif, bool add)
 102{
 103        struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
 104
 105        if (add)
 106                return iwlagn_add_bssid_station(priv, vif_priv->ctx,
 107                                                vif->bss_conf.bssid,
 108                                                &vif_priv->ibss_bssid_sta_id);
 109        return iwl_remove_station(priv, vif_priv->ibss_bssid_sta_id,
 110                                  vif->bss_conf.bssid);
 111}
 112
 113/**
 114 * iwlagn_txfifo_flush: send REPLY_TXFIFO_FLUSH command to uCode
 115 *
 116 * pre-requirements:
 117 *  1. acquire mutex before calling
 118 *  2. make sure rf is on and not in exit state
 119 */
 120int iwlagn_txfifo_flush(struct iwl_priv *priv, u32 scd_q_msk)
 121{
 122        struct iwl_txfifo_flush_cmd_v3 flush_cmd_v3 = {
 123                .flush_control = cpu_to_le16(IWL_DROP_ALL),
 124        };
 125        struct iwl_txfifo_flush_cmd_v2 flush_cmd_v2 = {
 126                .flush_control = cpu_to_le16(IWL_DROP_ALL),
 127        };
 128
 129        u32 queue_control = IWL_SCD_VO_MSK | IWL_SCD_VI_MSK |
 130                            IWL_SCD_BE_MSK | IWL_SCD_BK_MSK | IWL_SCD_MGMT_MSK;
 131
 132        if ((priv->valid_contexts != BIT(IWL_RXON_CTX_BSS)))
 133                queue_control |= IWL_PAN_SCD_VO_MSK | IWL_PAN_SCD_VI_MSK |
 134                                 IWL_PAN_SCD_BE_MSK | IWL_PAN_SCD_BK_MSK |
 135                                 IWL_PAN_SCD_MGMT_MSK |
 136                                 IWL_PAN_SCD_MULTICAST_MSK;
 137
 138        if (priv->nvm_data->sku_cap_11n_enable)
 139                queue_control |= IWL_AGG_TX_QUEUE_MSK;
 140
 141        if (scd_q_msk)
 142                queue_control = scd_q_msk;
 143
 144        IWL_DEBUG_INFO(priv, "queue control: 0x%x\n", queue_control);
 145        flush_cmd_v3.queue_control = cpu_to_le32(queue_control);
 146        flush_cmd_v2.queue_control = cpu_to_le16((u16)queue_control);
 147
 148        if (IWL_UCODE_API(priv->fw->ucode_ver) > 2)
 149                return iwl_dvm_send_cmd_pdu(priv, REPLY_TXFIFO_FLUSH, 0,
 150                                            sizeof(flush_cmd_v3),
 151                                            &flush_cmd_v3);
 152        return iwl_dvm_send_cmd_pdu(priv, REPLY_TXFIFO_FLUSH, 0,
 153                                    sizeof(flush_cmd_v2), &flush_cmd_v2);
 154}
 155
 156void iwlagn_dev_txfifo_flush(struct iwl_priv *priv)
 157{
 158        mutex_lock(&priv->mutex);
 159        ieee80211_stop_queues(priv->hw);
 160        if (iwlagn_txfifo_flush(priv, 0)) {
 161                IWL_ERR(priv, "flush request fail\n");
 162                goto done;
 163        }
 164        IWL_DEBUG_INFO(priv, "wait transmit/flush all frames\n");
 165        iwl_trans_wait_tx_queues_empty(priv->trans, 0xffffffff);
 166done:
 167        ieee80211_wake_queues(priv->hw);
 168        mutex_unlock(&priv->mutex);
 169}
 170
 171/*
 172 * BT coex
 173 */
 174/* Notmal TDM */
 175static const __le32 iwlagn_def_3w_lookup[IWLAGN_BT_DECISION_LUT_SIZE] = {
 176        cpu_to_le32(0xaaaaaaaa),
 177        cpu_to_le32(0xaaaaaaaa),
 178        cpu_to_le32(0xaeaaaaaa),
 179        cpu_to_le32(0xaaaaaaaa),
 180        cpu_to_le32(0xcc00ff28),
 181        cpu_to_le32(0x0000aaaa),
 182        cpu_to_le32(0xcc00aaaa),
 183        cpu_to_le32(0x0000aaaa),
 184        cpu_to_le32(0xc0004000),
 185        cpu_to_le32(0x00004000),
 186        cpu_to_le32(0xf0005000),
 187        cpu_to_le32(0xf0005000),
 188};
 189
 190/* Full concurrency */
 191static const __le32 iwlagn_concurrent_lookup[IWLAGN_BT_DECISION_LUT_SIZE] = {
 192        cpu_to_le32(0xaaaaaaaa),
 193        cpu_to_le32(0xaaaaaaaa),
 194        cpu_to_le32(0xaaaaaaaa),
 195        cpu_to_le32(0xaaaaaaaa),
 196        cpu_to_le32(0xaaaaaaaa),
 197        cpu_to_le32(0xaaaaaaaa),
 198        cpu_to_le32(0xaaaaaaaa),
 199        cpu_to_le32(0xaaaaaaaa),
 200        cpu_to_le32(0x00000000),
 201        cpu_to_le32(0x00000000),
 202        cpu_to_le32(0x00000000),
 203        cpu_to_le32(0x00000000),
 204};
 205
 206void iwlagn_send_advance_bt_config(struct iwl_priv *priv)
 207{
 208        struct iwl_basic_bt_cmd basic = {
 209                .max_kill = IWLAGN_BT_MAX_KILL_DEFAULT,
 210                .bt3_timer_t7_value = IWLAGN_BT3_T7_DEFAULT,
 211                .bt3_prio_sample_time = IWLAGN_BT3_PRIO_SAMPLE_DEFAULT,
 212                .bt3_timer_t2_value = IWLAGN_BT3_T2_DEFAULT,
 213        };
 214        struct iwl_bt_cmd_v1 bt_cmd_v1;
 215        struct iwl_bt_cmd_v2 bt_cmd_v2;
 216        int ret;
 217
 218        BUILD_BUG_ON(sizeof(iwlagn_def_3w_lookup) !=
 219                        sizeof(basic.bt3_lookup_table));
 220
 221        if (priv->lib->bt_params) {
 222                /*
 223                 * newer generation of devices (2000 series and newer)
 224                 * use the version 2 of the bt command
 225                 * we need to make sure sending the host command
 226                 * with correct data structure to avoid uCode assert
 227                 */
 228                if (priv->lib->bt_params->bt_session_2) {
 229                        bt_cmd_v2.prio_boost = cpu_to_le32(
 230                                priv->lib->bt_params->bt_prio_boost);
 231                        bt_cmd_v2.tx_prio_boost = 0;
 232                        bt_cmd_v2.rx_prio_boost = 0;
 233                } else {
 234                        /* older version only has 8 bits */
 235                        WARN_ON(priv->lib->bt_params->bt_prio_boost & ~0xFF);
 236                        bt_cmd_v1.prio_boost =
 237                                priv->lib->bt_params->bt_prio_boost;
 238                        bt_cmd_v1.tx_prio_boost = 0;
 239                        bt_cmd_v1.rx_prio_boost = 0;
 240                }
 241        } else {
 242                IWL_ERR(priv, "failed to construct BT Coex Config\n");
 243                return;
 244        }
 245
 246        /*
 247         * Possible situations when BT needs to take over for receive,
 248         * at the same time where STA needs to response to AP's frame(s),
 249         * reduce the tx power of the required response frames, by that,
 250         * allow the concurrent BT receive & WiFi transmit
 251         * (BT - ANT A, WiFi -ANT B), without interference to one another
 252         *
 253         * Reduced tx power apply to control frames only (ACK/Back/CTS)
 254         * when indicated by the BT config command
 255         */
 256        basic.kill_ack_mask = priv->kill_ack_mask;
 257        basic.kill_cts_mask = priv->kill_cts_mask;
 258        if (priv->reduced_txpower)
 259                basic.reduce_txpower = IWLAGN_BT_REDUCED_TX_PWR;
 260        basic.valid = priv->bt_valid;
 261
 262        /*
 263         * Configure BT coex mode to "no coexistence" when the
 264         * user disabled BT coexistence, we have no interface
 265         * (might be in monitor mode), or the interface is in
 266         * IBSS mode (no proper uCode support for coex then).
 267         */
 268        if (!iwlwifi_mod_params.bt_coex_active ||
 269            priv->iw_mode == NL80211_IFTYPE_ADHOC) {
 270                basic.flags = IWLAGN_BT_FLAG_COEX_MODE_DISABLED;
 271        } else {
 272                basic.flags = IWLAGN_BT_FLAG_COEX_MODE_3W <<
 273                                        IWLAGN_BT_FLAG_COEX_MODE_SHIFT;
 274
 275                if (!priv->bt_enable_pspoll)
 276                        basic.flags |= IWLAGN_BT_FLAG_SYNC_2_BT_DISABLE;
 277                else
 278                        basic.flags &= ~IWLAGN_BT_FLAG_SYNC_2_BT_DISABLE;
 279
 280                if (priv->bt_ch_announce)
 281                        basic.flags |= IWLAGN_BT_FLAG_CHANNEL_INHIBITION;
 282                IWL_DEBUG_COEX(priv, "BT coex flag: 0X%x\n", basic.flags);
 283        }
 284        priv->bt_enable_flag = basic.flags;
 285        if (priv->bt_full_concurrent)
 286                memcpy(basic.bt3_lookup_table, iwlagn_concurrent_lookup,
 287                        sizeof(iwlagn_concurrent_lookup));
 288        else
 289                memcpy(basic.bt3_lookup_table, iwlagn_def_3w_lookup,
 290                        sizeof(iwlagn_def_3w_lookup));
 291
 292        IWL_DEBUG_COEX(priv, "BT coex %s in %s mode\n",
 293                       basic.flags ? "active" : "disabled",
 294                       priv->bt_full_concurrent ?
 295                       "full concurrency" : "3-wire");
 296
 297        if (priv->lib->bt_params->bt_session_2) {
 298                memcpy(&bt_cmd_v2.basic, &basic,
 299                        sizeof(basic));
 300                ret = iwl_dvm_send_cmd_pdu(priv, REPLY_BT_CONFIG,
 301                        0, sizeof(bt_cmd_v2), &bt_cmd_v2);
 302        } else {
 303                memcpy(&bt_cmd_v1.basic, &basic,
 304                        sizeof(basic));
 305                ret = iwl_dvm_send_cmd_pdu(priv, REPLY_BT_CONFIG,
 306                        0, sizeof(bt_cmd_v1), &bt_cmd_v1);
 307        }
 308        if (ret)
 309                IWL_ERR(priv, "failed to send BT Coex Config\n");
 310
 311}
 312
 313void iwlagn_bt_adjust_rssi_monitor(struct iwl_priv *priv, bool rssi_ena)
 314{
 315        struct iwl_rxon_context *ctx, *found_ctx = NULL;
 316        bool found_ap = false;
 317
 318        lockdep_assert_held(&priv->mutex);
 319
 320        /* Check whether AP or GO mode is active. */
 321        if (rssi_ena) {
 322                for_each_context(priv, ctx) {
 323                        if (ctx->vif && ctx->vif->type == NL80211_IFTYPE_AP &&
 324                            iwl_is_associated_ctx(ctx)) {
 325                                found_ap = true;
 326                                break;
 327                        }
 328                }
 329        }
 330
 331        /*
 332         * If disable was received or If GO/AP mode, disable RSSI
 333         * measurements.
 334         */
 335        if (!rssi_ena || found_ap) {
 336                if (priv->cur_rssi_ctx) {
 337                        ctx = priv->cur_rssi_ctx;
 338                        ieee80211_disable_rssi_reports(ctx->vif);
 339                        priv->cur_rssi_ctx = NULL;
 340                }
 341                return;
 342        }
 343
 344        /*
 345         * If rssi measurements need to be enabled, consider all cases now.
 346         * Figure out how many contexts are active.
 347         */
 348        for_each_context(priv, ctx) {
 349                if (ctx->vif && ctx->vif->type == NL80211_IFTYPE_STATION &&
 350                    iwl_is_associated_ctx(ctx)) {
 351                        found_ctx = ctx;
 352                        break;
 353                }
 354        }
 355
 356        /*
 357         * rssi monitor already enabled for the correct interface...nothing
 358         * to do.
 359         */
 360        if (found_ctx == priv->cur_rssi_ctx)
 361                return;
 362
 363        /*
 364         * Figure out if rssi monitor is currently enabled, and needs
 365         * to be changed. If rssi monitor is already enabled, disable
 366         * it first else just enable rssi measurements on the
 367         * interface found above.
 368         */
 369        if (priv->cur_rssi_ctx) {
 370                ctx = priv->cur_rssi_ctx;
 371                if (ctx->vif)
 372                        ieee80211_disable_rssi_reports(ctx->vif);
 373        }
 374
 375        priv->cur_rssi_ctx = found_ctx;
 376
 377        if (!found_ctx)
 378                return;
 379
 380        ieee80211_enable_rssi_reports(found_ctx->vif,
 381                        IWLAGN_BT_PSP_MIN_RSSI_THRESHOLD,
 382                        IWLAGN_BT_PSP_MAX_RSSI_THRESHOLD);
 383}
 384
 385static bool iwlagn_bt_traffic_is_sco(struct iwl_bt_uart_msg *uart_msg)
 386{
 387        return (BT_UART_MSG_FRAME3SCOESCO_MSK & uart_msg->frame3) >>
 388                BT_UART_MSG_FRAME3SCOESCO_POS;
 389}
 390
 391static void iwlagn_bt_traffic_change_work(struct work_struct *work)
 392{
 393        struct iwl_priv *priv =
 394                container_of(work, struct iwl_priv, bt_traffic_change_work);
 395        struct iwl_rxon_context *ctx;
 396        int smps_request = -1;
 397
 398        if (priv->bt_enable_flag == IWLAGN_BT_FLAG_COEX_MODE_DISABLED) {
 399                /* bt coex disabled */
 400                return;
 401        }
 402
 403        /*
 404         * Note: bt_traffic_load can be overridden by scan complete and
 405         * coex profile notifications. Ignore that since only bad consequence
 406         * can be not matching debug print with actual state.
 407         */
 408        IWL_DEBUG_COEX(priv, "BT traffic load changes: %d\n",
 409                       priv->bt_traffic_load);
 410
 411        switch (priv->bt_traffic_load) {
 412        case IWL_BT_COEX_TRAFFIC_LOAD_NONE:
 413                if (priv->bt_status)
 414                        smps_request = IEEE80211_SMPS_DYNAMIC;
 415                else
 416                        smps_request = IEEE80211_SMPS_AUTOMATIC;
 417                break;
 418        case IWL_BT_COEX_TRAFFIC_LOAD_LOW:
 419                smps_request = IEEE80211_SMPS_DYNAMIC;
 420                break;
 421        case IWL_BT_COEX_TRAFFIC_LOAD_HIGH:
 422        case IWL_BT_COEX_TRAFFIC_LOAD_CONTINUOUS:
 423                smps_request = IEEE80211_SMPS_STATIC;
 424                break;
 425        default:
 426                IWL_ERR(priv, "Invalid BT traffic load: %d\n",
 427                        priv->bt_traffic_load);
 428                break;
 429        }
 430
 431        mutex_lock(&priv->mutex);
 432
 433        /*
 434         * We can not send command to firmware while scanning. When the scan
 435         * complete we will schedule this work again. We do check with mutex
 436         * locked to prevent new scan request to arrive. We do not check
 437         * STATUS_SCANNING to avoid race when queue_work two times from
 438         * different notifications, but quit and not perform any work at all.
 439         */
 440        if (test_bit(STATUS_SCAN_HW, &priv->status))
 441                goto out;
 442
 443        iwl_update_chain_flags(priv);
 444
 445        if (smps_request != -1) {
 446                priv->current_ht_config.smps = smps_request;
 447                for_each_context(priv, ctx) {
 448                        if (ctx->vif && ctx->vif->type == NL80211_IFTYPE_STATION)
 449                                ieee80211_request_smps(ctx->vif, smps_request);
 450                }
 451        }
 452
 453        /*
 454         * Dynamic PS poll related functionality. Adjust RSSI measurements if
 455         * necessary.
 456         */
 457        iwlagn_bt_coex_rssi_monitor(priv);
 458out:
 459        mutex_unlock(&priv->mutex);
 460}
 461
 462/*
 463 * If BT sco traffic, and RSSI monitor is enabled, move measurements to the
 464 * correct interface or disable it if this is the last interface to be
 465 * removed.
 466 */
 467void iwlagn_bt_coex_rssi_monitor(struct iwl_priv *priv)
 468{
 469        if (priv->bt_is_sco &&
 470            priv->bt_traffic_load == IWL_BT_COEX_TRAFFIC_LOAD_CONTINUOUS)
 471                iwlagn_bt_adjust_rssi_monitor(priv, true);
 472        else
 473                iwlagn_bt_adjust_rssi_monitor(priv, false);
 474}
 475
 476static void iwlagn_print_uartmsg(struct iwl_priv *priv,
 477                                struct iwl_bt_uart_msg *uart_msg)
 478{
 479        IWL_DEBUG_COEX(priv, "Message Type = 0x%X, SSN = 0x%X, "
 480                        "Update Req = 0x%X\n",
 481                (BT_UART_MSG_FRAME1MSGTYPE_MSK & uart_msg->frame1) >>
 482                        BT_UART_MSG_FRAME1MSGTYPE_POS,
 483                (BT_UART_MSG_FRAME1SSN_MSK & uart_msg->frame1) >>
 484                        BT_UART_MSG_FRAME1SSN_POS,
 485                (BT_UART_MSG_FRAME1UPDATEREQ_MSK & uart_msg->frame1) >>
 486                        BT_UART_MSG_FRAME1UPDATEREQ_POS);
 487
 488        IWL_DEBUG_COEX(priv, "Open connections = 0x%X, Traffic load = 0x%X, "
 489                        "Chl_SeqN = 0x%X, In band = 0x%X\n",
 490                (BT_UART_MSG_FRAME2OPENCONNECTIONS_MSK & uart_msg->frame2) >>
 491                        BT_UART_MSG_FRAME2OPENCONNECTIONS_POS,
 492                (BT_UART_MSG_FRAME2TRAFFICLOAD_MSK & uart_msg->frame2) >>
 493                        BT_UART_MSG_FRAME2TRAFFICLOAD_POS,
 494                (BT_UART_MSG_FRAME2CHLSEQN_MSK & uart_msg->frame2) >>
 495                        BT_UART_MSG_FRAME2CHLSEQN_POS,
 496                (BT_UART_MSG_FRAME2INBAND_MSK & uart_msg->frame2) >>
 497                        BT_UART_MSG_FRAME2INBAND_POS);
 498
 499        IWL_DEBUG_COEX(priv, "SCO/eSCO = 0x%X, Sniff = 0x%X, A2DP = 0x%X, "
 500                        "ACL = 0x%X, Master = 0x%X, OBEX = 0x%X\n",
 501                (BT_UART_MSG_FRAME3SCOESCO_MSK & uart_msg->frame3) >>
 502                        BT_UART_MSG_FRAME3SCOESCO_POS,
 503                (BT_UART_MSG_FRAME3SNIFF_MSK & uart_msg->frame3) >>
 504                        BT_UART_MSG_FRAME3SNIFF_POS,
 505                (BT_UART_MSG_FRAME3A2DP_MSK & uart_msg->frame3) >>
 506                        BT_UART_MSG_FRAME3A2DP_POS,
 507                (BT_UART_MSG_FRAME3ACL_MSK & uart_msg->frame3) >>
 508                        BT_UART_MSG_FRAME3ACL_POS,
 509                (BT_UART_MSG_FRAME3MASTER_MSK & uart_msg->frame3) >>
 510                        BT_UART_MSG_FRAME3MASTER_POS,
 511                (BT_UART_MSG_FRAME3OBEX_MSK & uart_msg->frame3) >>
 512                        BT_UART_MSG_FRAME3OBEX_POS);
 513
 514        IWL_DEBUG_COEX(priv, "Idle duration = 0x%X\n",
 515                (BT_UART_MSG_FRAME4IDLEDURATION_MSK & uart_msg->frame4) >>
 516                        BT_UART_MSG_FRAME4IDLEDURATION_POS);
 517
 518        IWL_DEBUG_COEX(priv, "Tx Activity = 0x%X, Rx Activity = 0x%X, "
 519                        "eSCO Retransmissions = 0x%X\n",
 520                (BT_UART_MSG_FRAME5TXACTIVITY_MSK & uart_msg->frame5) >>
 521                        BT_UART_MSG_FRAME5TXACTIVITY_POS,
 522                (BT_UART_MSG_FRAME5RXACTIVITY_MSK & uart_msg->frame5) >>
 523                        BT_UART_MSG_FRAME5RXACTIVITY_POS,
 524                (BT_UART_MSG_FRAME5ESCORETRANSMIT_MSK & uart_msg->frame5) >>
 525                        BT_UART_MSG_FRAME5ESCORETRANSMIT_POS);
 526
 527        IWL_DEBUG_COEX(priv, "Sniff Interval = 0x%X, Discoverable = 0x%X\n",
 528                (BT_UART_MSG_FRAME6SNIFFINTERVAL_MSK & uart_msg->frame6) >>
 529                        BT_UART_MSG_FRAME6SNIFFINTERVAL_POS,
 530                (BT_UART_MSG_FRAME6DISCOVERABLE_MSK & uart_msg->frame6) >>
 531                        BT_UART_MSG_FRAME6DISCOVERABLE_POS);
 532
 533        IWL_DEBUG_COEX(priv, "Sniff Activity = 0x%X, Page = "
 534                        "0x%X, Inquiry = 0x%X, Connectable = 0x%X\n",
 535                (BT_UART_MSG_FRAME7SNIFFACTIVITY_MSK & uart_msg->frame7) >>
 536                        BT_UART_MSG_FRAME7SNIFFACTIVITY_POS,
 537                (BT_UART_MSG_FRAME7PAGE_MSK & uart_msg->frame7) >>
 538                        BT_UART_MSG_FRAME7PAGE_POS,
 539                (BT_UART_MSG_FRAME7INQUIRY_MSK & uart_msg->frame7) >>
 540                        BT_UART_MSG_FRAME7INQUIRY_POS,
 541                (BT_UART_MSG_FRAME7CONNECTABLE_MSK & uart_msg->frame7) >>
 542                        BT_UART_MSG_FRAME7CONNECTABLE_POS);
 543}
 544
 545static bool iwlagn_set_kill_msk(struct iwl_priv *priv,
 546                                struct iwl_bt_uart_msg *uart_msg)
 547{
 548        bool need_update = false;
 549        u8 kill_msk = IWL_BT_KILL_REDUCE;
 550        static const __le32 bt_kill_ack_msg[3] = {
 551                IWLAGN_BT_KILL_ACK_MASK_DEFAULT,
 552                IWLAGN_BT_KILL_ACK_CTS_MASK_SCO,
 553                IWLAGN_BT_KILL_ACK_CTS_MASK_REDUCE};
 554        static const __le32 bt_kill_cts_msg[3] = {
 555                IWLAGN_BT_KILL_CTS_MASK_DEFAULT,
 556                IWLAGN_BT_KILL_ACK_CTS_MASK_SCO,
 557                IWLAGN_BT_KILL_ACK_CTS_MASK_REDUCE};
 558
 559        if (!priv->reduced_txpower)
 560                kill_msk = (BT_UART_MSG_FRAME3SCOESCO_MSK & uart_msg->frame3)
 561                        ? IWL_BT_KILL_OVERRIDE : IWL_BT_KILL_DEFAULT;
 562        if (priv->kill_ack_mask != bt_kill_ack_msg[kill_msk] ||
 563            priv->kill_cts_mask != bt_kill_cts_msg[kill_msk]) {
 564                priv->bt_valid |= IWLAGN_BT_VALID_KILL_ACK_MASK;
 565                priv->kill_ack_mask = bt_kill_ack_msg[kill_msk];
 566                priv->bt_valid |= IWLAGN_BT_VALID_KILL_CTS_MASK;
 567                priv->kill_cts_mask = bt_kill_cts_msg[kill_msk];
 568                need_update = true;
 569        }
 570        return need_update;
 571}
 572
 573/*
 574 * Upon RSSI changes, sends a bt config command with following changes
 575 *  1. enable/disable "reduced control frames tx power
 576 *  2. update the "kill)ack_mask" and "kill_cts_mask"
 577 *
 578 * If "reduced tx power" is enabled, uCode shall
 579 *  1. ACK/Back/CTS rate shall reduced to 6Mbps
 580 *  2. not use duplciate 20/40MHz mode
 581 */
 582static bool iwlagn_fill_txpower_mode(struct iwl_priv *priv,
 583                                struct iwl_bt_uart_msg *uart_msg)
 584{
 585        bool need_update = false;
 586        struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
 587        int ave_rssi;
 588
 589        if (!ctx->vif || (ctx->vif->type != NL80211_IFTYPE_STATION)) {
 590                IWL_DEBUG_INFO(priv, "BSS ctx not active or not in sta mode\n");
 591                return false;
 592        }
 593
 594        ave_rssi = ieee80211_ave_rssi(ctx->vif);
 595        if (!ave_rssi) {
 596                /* no rssi data, no changes to reduce tx power */
 597                IWL_DEBUG_COEX(priv, "no rssi data available\n");
 598                return need_update;
 599        }
 600        if (!priv->reduced_txpower &&
 601            !iwl_is_associated(priv, IWL_RXON_CTX_PAN) &&
 602            (ave_rssi > BT_ENABLE_REDUCED_TXPOWER_THRESHOLD) &&
 603            (uart_msg->frame3 & (BT_UART_MSG_FRAME3ACL_MSK |
 604            BT_UART_MSG_FRAME3OBEX_MSK)) &&
 605            !(uart_msg->frame3 & (BT_UART_MSG_FRAME3SCOESCO_MSK |
 606            BT_UART_MSG_FRAME3SNIFF_MSK | BT_UART_MSG_FRAME3A2DP_MSK))) {
 607                /* enabling reduced tx power */
 608                priv->reduced_txpower = true;
 609                priv->bt_valid |= IWLAGN_BT_VALID_REDUCED_TX_PWR;
 610                need_update = true;
 611        } else if (priv->reduced_txpower &&
 612                   (iwl_is_associated(priv, IWL_RXON_CTX_PAN) ||
 613                   (ave_rssi < BT_DISABLE_REDUCED_TXPOWER_THRESHOLD) ||
 614                   (uart_msg->frame3 & (BT_UART_MSG_FRAME3SCOESCO_MSK |
 615                   BT_UART_MSG_FRAME3SNIFF_MSK | BT_UART_MSG_FRAME3A2DP_MSK)) ||
 616                   !(uart_msg->frame3 & (BT_UART_MSG_FRAME3ACL_MSK |
 617                   BT_UART_MSG_FRAME3OBEX_MSK)))) {
 618                /* disable reduced tx power */
 619                priv->reduced_txpower = false;
 620                priv->bt_valid |= IWLAGN_BT_VALID_REDUCED_TX_PWR;
 621                need_update = true;
 622        }
 623
 624        return need_update;
 625}
 626
 627static void iwlagn_bt_coex_profile_notif(struct iwl_priv *priv,
 628                                         struct iwl_rx_cmd_buffer *rxb)
 629{
 630        struct iwl_rx_packet *pkt = rxb_addr(rxb);
 631        struct iwl_bt_coex_profile_notif *coex = (void *)pkt->data;
 632        struct iwl_bt_uart_msg *uart_msg = &coex->last_bt_uart_msg;
 633
 634        if (priv->bt_enable_flag == IWLAGN_BT_FLAG_COEX_MODE_DISABLED) {
 635                /* bt coex disabled */
 636                return;
 637        }
 638
 639        IWL_DEBUG_COEX(priv, "BT Coex notification:\n");
 640        IWL_DEBUG_COEX(priv, "    status: %d\n", coex->bt_status);
 641        IWL_DEBUG_COEX(priv, "    traffic load: %d\n", coex->bt_traffic_load);
 642        IWL_DEBUG_COEX(priv, "    CI compliance: %d\n",
 643                        coex->bt_ci_compliance);
 644        iwlagn_print_uartmsg(priv, uart_msg);
 645
 646        priv->last_bt_traffic_load = priv->bt_traffic_load;
 647        priv->bt_is_sco = iwlagn_bt_traffic_is_sco(uart_msg);
 648
 649        if (priv->iw_mode != NL80211_IFTYPE_ADHOC) {
 650                if (priv->bt_status != coex->bt_status ||
 651                    priv->last_bt_traffic_load != coex->bt_traffic_load) {
 652                        if (coex->bt_status) {
 653                                /* BT on */
 654                                if (!priv->bt_ch_announce)
 655                                        priv->bt_traffic_load =
 656                                                IWL_BT_COEX_TRAFFIC_LOAD_HIGH;
 657                                else
 658                                        priv->bt_traffic_load =
 659                                                coex->bt_traffic_load;
 660                        } else {
 661                                /* BT off */
 662                                priv->bt_traffic_load =
 663                                        IWL_BT_COEX_TRAFFIC_LOAD_NONE;
 664                        }
 665                        priv->bt_status = coex->bt_status;
 666                        queue_work(priv->workqueue,
 667                                   &priv->bt_traffic_change_work);
 668                }
 669        }
 670
 671        /* schedule to send runtime bt_config */
 672        /* check reduce power before change ack/cts kill mask */
 673        if (iwlagn_fill_txpower_mode(priv, uart_msg) ||
 674            iwlagn_set_kill_msk(priv, uart_msg))
 675                queue_work(priv->workqueue, &priv->bt_runtime_config);
 676
 677
 678        /* FIXME: based on notification, adjust the prio_boost */
 679
 680        priv->bt_ci_compliance = coex->bt_ci_compliance;
 681}
 682
 683void iwlagn_bt_rx_handler_setup(struct iwl_priv *priv)
 684{
 685        priv->rx_handlers[REPLY_BT_COEX_PROFILE_NOTIF] =
 686                iwlagn_bt_coex_profile_notif;
 687}
 688
 689void iwlagn_bt_setup_deferred_work(struct iwl_priv *priv)
 690{
 691        INIT_WORK(&priv->bt_traffic_change_work,
 692                  iwlagn_bt_traffic_change_work);
 693}
 694
 695void iwlagn_bt_cancel_deferred_work(struct iwl_priv *priv)
 696{
 697        cancel_work_sync(&priv->bt_traffic_change_work);
 698}
 699
 700static bool is_single_rx_stream(struct iwl_priv *priv)
 701{
 702        return priv->current_ht_config.smps == IEEE80211_SMPS_STATIC ||
 703               priv->current_ht_config.single_chain_sufficient;
 704}
 705
 706#define IWL_NUM_RX_CHAINS_MULTIPLE      3
 707#define IWL_NUM_RX_CHAINS_SINGLE        2
 708#define IWL_NUM_IDLE_CHAINS_DUAL        2
 709#define IWL_NUM_IDLE_CHAINS_SINGLE      1
 710
 711/*
 712 * Determine how many receiver/antenna chains to use.
 713 *
 714 * More provides better reception via diversity.  Fewer saves power
 715 * at the expense of throughput, but only when not in powersave to
 716 * start with.
 717 *
 718 * MIMO (dual stream) requires at least 2, but works better with 3.
 719 * This does not determine *which* chains to use, just how many.
 720 */
 721static int iwl_get_active_rx_chain_count(struct iwl_priv *priv)
 722{
 723        if (priv->lib->bt_params &&
 724            priv->lib->bt_params->advanced_bt_coexist &&
 725            (priv->bt_full_concurrent ||
 726             priv->bt_traffic_load >= IWL_BT_COEX_TRAFFIC_LOAD_HIGH)) {
 727                /*
 728                 * only use chain 'A' in bt high traffic load or
 729                 * full concurrency mode
 730                 */
 731                return IWL_NUM_RX_CHAINS_SINGLE;
 732        }
 733        /* # of Rx chains to use when expecting MIMO. */
 734        if (is_single_rx_stream(priv))
 735                return IWL_NUM_RX_CHAINS_SINGLE;
 736        else
 737                return IWL_NUM_RX_CHAINS_MULTIPLE;
 738}
 739
 740/*
 741 * When we are in power saving mode, unless device support spatial
 742 * multiplexing power save, use the active count for rx chain count.
 743 */
 744static int iwl_get_idle_rx_chain_count(struct iwl_priv *priv, int active_cnt)
 745{
 746        /* # Rx chains when idling, depending on SMPS mode */
 747        switch (priv->current_ht_config.smps) {
 748        case IEEE80211_SMPS_STATIC:
 749        case IEEE80211_SMPS_DYNAMIC:
 750                return IWL_NUM_IDLE_CHAINS_SINGLE;
 751        case IEEE80211_SMPS_AUTOMATIC:
 752        case IEEE80211_SMPS_OFF:
 753                return active_cnt;
 754        default:
 755                WARN(1, "invalid SMPS mode %d",
 756                     priv->current_ht_config.smps);
 757                return active_cnt;
 758        }
 759}
 760
 761/* up to 4 chains */
 762static u8 iwl_count_chain_bitmap(u32 chain_bitmap)
 763{
 764        u8 res;
 765        res = (chain_bitmap & BIT(0)) >> 0;
 766        res += (chain_bitmap & BIT(1)) >> 1;
 767        res += (chain_bitmap & BIT(2)) >> 2;
 768        res += (chain_bitmap & BIT(3)) >> 3;
 769        return res;
 770}
 771
 772/**
 773 * iwlagn_set_rxon_chain - Set up Rx chain usage in "staging" RXON image
 774 *
 775 * Selects how many and which Rx receivers/antennas/chains to use.
 776 * This should not be used for scan command ... it puts data in wrong place.
 777 */
 778void iwlagn_set_rxon_chain(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
 779{
 780        bool is_single = is_single_rx_stream(priv);
 781        bool is_cam = !test_bit(STATUS_POWER_PMI, &priv->status);
 782        u8 idle_rx_cnt, active_rx_cnt, valid_rx_cnt;
 783        u32 active_chains;
 784        u16 rx_chain;
 785
 786        /* Tell uCode which antennas are actually connected.
 787         * Before first association, we assume all antennas are connected.
 788         * Just after first association, iwl_chain_noise_calibration()
 789         *    checks which antennas actually *are* connected. */
 790        if (priv->chain_noise_data.active_chains)
 791                active_chains = priv->chain_noise_data.active_chains;
 792        else
 793                active_chains = priv->nvm_data->valid_rx_ant;
 794
 795        if (priv->lib->bt_params &&
 796            priv->lib->bt_params->advanced_bt_coexist &&
 797            (priv->bt_full_concurrent ||
 798             priv->bt_traffic_load >= IWL_BT_COEX_TRAFFIC_LOAD_HIGH)) {
 799                /*
 800                 * only use chain 'A' in bt high traffic load or
 801                 * full concurrency mode
 802                 */
 803                active_chains = first_antenna(active_chains);
 804        }
 805
 806        rx_chain = active_chains << RXON_RX_CHAIN_VALID_POS;
 807
 808        /* How many receivers should we use? */
 809        active_rx_cnt = iwl_get_active_rx_chain_count(priv);
 810        idle_rx_cnt = iwl_get_idle_rx_chain_count(priv, active_rx_cnt);
 811
 812
 813        /* correct rx chain count according hw settings
 814         * and chain noise calibration
 815         */
 816        valid_rx_cnt = iwl_count_chain_bitmap(active_chains);
 817        if (valid_rx_cnt < active_rx_cnt)
 818                active_rx_cnt = valid_rx_cnt;
 819
 820        if (valid_rx_cnt < idle_rx_cnt)
 821                idle_rx_cnt = valid_rx_cnt;
 822
 823        rx_chain |= active_rx_cnt << RXON_RX_CHAIN_MIMO_CNT_POS;
 824        rx_chain |= idle_rx_cnt  << RXON_RX_CHAIN_CNT_POS;
 825
 826        ctx->staging.rx_chain = cpu_to_le16(rx_chain);
 827
 828        if (!is_single && (active_rx_cnt >= IWL_NUM_RX_CHAINS_SINGLE) && is_cam)
 829                ctx->staging.rx_chain |= RXON_RX_CHAIN_MIMO_FORCE_MSK;
 830        else
 831                ctx->staging.rx_chain &= ~RXON_RX_CHAIN_MIMO_FORCE_MSK;
 832
 833        IWL_DEBUG_ASSOC(priv, "rx_chain=0x%X active=%d idle=%d\n",
 834                        ctx->staging.rx_chain,
 835                        active_rx_cnt, idle_rx_cnt);
 836
 837        WARN_ON(active_rx_cnt == 0 || idle_rx_cnt == 0 ||
 838                active_rx_cnt < idle_rx_cnt);
 839}
 840
 841u8 iwl_toggle_tx_ant(struct iwl_priv *priv, u8 ant, u8 valid)
 842{
 843        int i;
 844        u8 ind = ant;
 845
 846        if (priv->band == NL80211_BAND_2GHZ &&
 847            priv->bt_traffic_load >= IWL_BT_COEX_TRAFFIC_LOAD_HIGH)
 848                return 0;
 849
 850        for (i = 0; i < RATE_ANT_NUM - 1; i++) {
 851                ind = (ind + 1) < RATE_ANT_NUM ?  ind + 1 : 0;
 852                if (valid & BIT(ind))
 853                        return ind;
 854        }
 855        return ant;
 856}
 857
 858#ifdef CONFIG_PM_SLEEP
 859static void iwlagn_convert_p1k(u16 *p1k, __le16 *out)
 860{
 861        int i;
 862
 863        for (i = 0; i < IWLAGN_P1K_SIZE; i++)
 864                out[i] = cpu_to_le16(p1k[i]);
 865}
 866
 867struct wowlan_key_data {
 868        struct iwl_rxon_context *ctx;
 869        struct iwlagn_wowlan_rsc_tsc_params_cmd *rsc_tsc;
 870        struct iwlagn_wowlan_tkip_params_cmd *tkip;
 871        const u8 *bssid;
 872        bool error, use_rsc_tsc, use_tkip;
 873};
 874
 875
 876static void iwlagn_wowlan_program_keys(struct ieee80211_hw *hw,
 877                               struct ieee80211_vif *vif,
 878                               struct ieee80211_sta *sta,
 879                               struct ieee80211_key_conf *key,
 880                               void *_data)
 881{
 882        struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 883        struct wowlan_key_data *data = _data;
 884        struct iwl_rxon_context *ctx = data->ctx;
 885        struct aes_sc *aes_sc, *aes_tx_sc = NULL;
 886        struct tkip_sc *tkip_sc, *tkip_tx_sc = NULL;
 887        struct iwlagn_p1k_cache *rx_p1ks;
 888        u8 *rx_mic_key;
 889        struct ieee80211_key_seq seq;
 890        u32 cur_rx_iv32 = 0;
 891        u16 p1k[IWLAGN_P1K_SIZE];
 892        int ret, i;
 893
 894        mutex_lock(&priv->mutex);
 895
 896        if ((key->cipher == WLAN_CIPHER_SUITE_WEP40 ||
 897             key->cipher == WLAN_CIPHER_SUITE_WEP104) &&
 898             !sta && !ctx->key_mapping_keys)
 899                ret = iwl_set_default_wep_key(priv, ctx, key);
 900        else
 901                ret = iwl_set_dynamic_key(priv, ctx, key, sta);
 902
 903        if (ret) {
 904                IWL_ERR(priv, "Error setting key during suspend!\n");
 905                data->error = true;
 906        }
 907
 908        switch (key->cipher) {
 909        case WLAN_CIPHER_SUITE_TKIP:
 910                if (sta) {
 911                        u64 pn64;
 912
 913                        tkip_sc = data->rsc_tsc->all_tsc_rsc.tkip.unicast_rsc;
 914                        tkip_tx_sc = &data->rsc_tsc->all_tsc_rsc.tkip.tsc;
 915
 916                        rx_p1ks = data->tkip->rx_uni;
 917
 918                        pn64 = atomic64_read(&key->tx_pn);
 919                        tkip_tx_sc->iv16 = cpu_to_le16(TKIP_PN_TO_IV16(pn64));
 920                        tkip_tx_sc->iv32 = cpu_to_le32(TKIP_PN_TO_IV32(pn64));
 921
 922                        ieee80211_get_tkip_p1k_iv(key, seq.tkip.iv32, p1k);
 923                        iwlagn_convert_p1k(p1k, data->tkip->tx.p1k);
 924
 925                        memcpy(data->tkip->mic_keys.tx,
 926                               &key->key[NL80211_TKIP_DATA_OFFSET_TX_MIC_KEY],
 927                               IWLAGN_MIC_KEY_SIZE);
 928
 929                        rx_mic_key = data->tkip->mic_keys.rx_unicast;
 930                } else {
 931                        tkip_sc =
 932                                data->rsc_tsc->all_tsc_rsc.tkip.multicast_rsc;
 933                        rx_p1ks = data->tkip->rx_multi;
 934                        rx_mic_key = data->tkip->mic_keys.rx_mcast;
 935                }
 936
 937                /*
 938                 * For non-QoS this relies on the fact that both the uCode and
 939                 * mac80211 use TID 0 (as they need to to avoid replay attacks)
 940                 * for checking the IV in the frames.
 941                 */
 942                for (i = 0; i < IWLAGN_NUM_RSC; i++) {
 943                        ieee80211_get_key_rx_seq(key, i, &seq);
 944                        tkip_sc[i].iv16 = cpu_to_le16(seq.tkip.iv16);
 945                        tkip_sc[i].iv32 = cpu_to_le32(seq.tkip.iv32);
 946                        /* wrapping isn't allowed, AP must rekey */
 947                        if (seq.tkip.iv32 > cur_rx_iv32)
 948                                cur_rx_iv32 = seq.tkip.iv32;
 949                }
 950
 951                ieee80211_get_tkip_rx_p1k(key, data->bssid, cur_rx_iv32, p1k);
 952                iwlagn_convert_p1k(p1k, rx_p1ks[0].p1k);
 953                ieee80211_get_tkip_rx_p1k(key, data->bssid,
 954                                          cur_rx_iv32 + 1, p1k);
 955                iwlagn_convert_p1k(p1k, rx_p1ks[1].p1k);
 956
 957                memcpy(rx_mic_key,
 958                       &key->key[NL80211_TKIP_DATA_OFFSET_RX_MIC_KEY],
 959                       IWLAGN_MIC_KEY_SIZE);
 960
 961                data->use_tkip = true;
 962                data->use_rsc_tsc = true;
 963                break;
 964        case WLAN_CIPHER_SUITE_CCMP:
 965                if (sta) {
 966                        u64 pn64;
 967
 968                        aes_sc = data->rsc_tsc->all_tsc_rsc.aes.unicast_rsc;
 969                        aes_tx_sc = &data->rsc_tsc->all_tsc_rsc.aes.tsc;
 970
 971                        pn64 = atomic64_read(&key->tx_pn);
 972                        aes_tx_sc->pn = cpu_to_le64(pn64);
 973                } else
 974                        aes_sc = data->rsc_tsc->all_tsc_rsc.aes.multicast_rsc;
 975
 976                /*
 977                 * For non-QoS this relies on the fact that both the uCode and
 978                 * mac80211 use TID 0 for checking the IV in the frames.
 979                 */
 980                for (i = 0; i < IWLAGN_NUM_RSC; i++) {
 981                        u8 *pn = seq.ccmp.pn;
 982
 983                        ieee80211_get_key_rx_seq(key, i, &seq);
 984                        aes_sc[i].pn = cpu_to_le64(
 985                                        (u64)pn[5] |
 986                                        ((u64)pn[4] << 8) |
 987                                        ((u64)pn[3] << 16) |
 988                                        ((u64)pn[2] << 24) |
 989                                        ((u64)pn[1] << 32) |
 990                                        ((u64)pn[0] << 40));
 991                }
 992                data->use_rsc_tsc = true;
 993                break;
 994        }
 995
 996        mutex_unlock(&priv->mutex);
 997}
 998
 999int iwlagn_send_patterns(struct iwl_priv *priv,
1000                        struct cfg80211_wowlan *wowlan)
1001{
1002        struct iwlagn_wowlan_patterns_cmd *pattern_cmd;
1003        struct iwl_host_cmd cmd = {
1004                .id = REPLY_WOWLAN_PATTERNS,
1005                .dataflags[0] = IWL_HCMD_DFL_NOCOPY,
1006        };
1007        int i, err;
1008
1009        if (!wowlan->n_patterns)
1010                return 0;
1011
1012        cmd.len[0] = struct_size(pattern_cmd, patterns, wowlan->n_patterns);
1013
1014        pattern_cmd = kmalloc(cmd.len[0], GFP_KERNEL);
1015        if (!pattern_cmd)
1016                return -ENOMEM;
1017
1018        pattern_cmd->n_patterns = cpu_to_le32(wowlan->n_patterns);
1019
1020        for (i = 0; i < wowlan->n_patterns; i++) {
1021                int mask_len = DIV_ROUND_UP(wowlan->patterns[i].pattern_len, 8);
1022
1023                memcpy(&pattern_cmd->patterns[i].mask,
1024                        wowlan->patterns[i].mask, mask_len);
1025                memcpy(&pattern_cmd->patterns[i].pattern,
1026                        wowlan->patterns[i].pattern,
1027                        wowlan->patterns[i].pattern_len);
1028                pattern_cmd->patterns[i].mask_size = mask_len;
1029                pattern_cmd->patterns[i].pattern_size =
1030                        wowlan->patterns[i].pattern_len;
1031        }
1032
1033        cmd.data[0] = pattern_cmd;
1034        err = iwl_dvm_send_cmd(priv, &cmd);
1035        kfree(pattern_cmd);
1036        return err;
1037}
1038
1039int iwlagn_suspend(struct iwl_priv *priv, struct cfg80211_wowlan *wowlan)
1040{
1041        struct iwlagn_wowlan_wakeup_filter_cmd wakeup_filter_cmd;
1042        struct iwl_rxon_cmd rxon;
1043        struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
1044        struct iwlagn_wowlan_kek_kck_material_cmd kek_kck_cmd;
1045        struct iwlagn_wowlan_tkip_params_cmd tkip_cmd = {};
1046        struct iwlagn_d3_config_cmd d3_cfg_cmd = {
1047                /*
1048                 * Program the minimum sleep time to 10 seconds, as many
1049                 * platforms have issues processing a wakeup signal while
1050                 * still being in the process of suspending.
1051                 */
1052                .min_sleep_time = cpu_to_le32(10 * 1000 * 1000),
1053        };
1054        struct wowlan_key_data key_data = {
1055                .ctx = ctx,
1056                .bssid = ctx->active.bssid_addr,
1057                .use_rsc_tsc = false,
1058                .tkip = &tkip_cmd,
1059                .use_tkip = false,
1060        };
1061        int ret, i;
1062        u16 seq;
1063
1064        key_data.rsc_tsc = kzalloc(sizeof(*key_data.rsc_tsc), GFP_KERNEL);
1065        if (!key_data.rsc_tsc)
1066                return -ENOMEM;
1067
1068        memset(&wakeup_filter_cmd, 0, sizeof(wakeup_filter_cmd));
1069
1070        /*
1071         * We know the last used seqno, and the uCode expects to know that
1072         * one, it will increment before TX.
1073         */
1074        seq = le16_to_cpu(priv->last_seq_ctl) & IEEE80211_SCTL_SEQ;
1075        wakeup_filter_cmd.non_qos_seq = cpu_to_le16(seq);
1076
1077        /*
1078         * For QoS counters, we store the one to use next, so subtract 0x10
1079         * since the uCode will add 0x10 before using the value.
1080         */
1081        for (i = 0; i < IWL_MAX_TID_COUNT; i++) {
1082                seq = priv->tid_data[IWL_AP_ID][i].seq_number;
1083                seq -= 0x10;
1084                wakeup_filter_cmd.qos_seq[i] = cpu_to_le16(seq);
1085        }
1086
1087        if (wowlan->disconnect)
1088                wakeup_filter_cmd.enabled |=
1089                        cpu_to_le32(IWLAGN_WOWLAN_WAKEUP_BEACON_MISS |
1090                                    IWLAGN_WOWLAN_WAKEUP_LINK_CHANGE);
1091        if (wowlan->magic_pkt)
1092                wakeup_filter_cmd.enabled |=
1093                        cpu_to_le32(IWLAGN_WOWLAN_WAKEUP_MAGIC_PACKET);
1094        if (wowlan->gtk_rekey_failure)
1095                wakeup_filter_cmd.enabled |=
1096                        cpu_to_le32(IWLAGN_WOWLAN_WAKEUP_GTK_REKEY_FAIL);
1097        if (wowlan->eap_identity_req)
1098                wakeup_filter_cmd.enabled |=
1099                        cpu_to_le32(IWLAGN_WOWLAN_WAKEUP_EAP_IDENT_REQ);
1100        if (wowlan->four_way_handshake)
1101                wakeup_filter_cmd.enabled |=
1102                        cpu_to_le32(IWLAGN_WOWLAN_WAKEUP_4WAY_HANDSHAKE);
1103        if (wowlan->n_patterns)
1104                wakeup_filter_cmd.enabled |=
1105                        cpu_to_le32(IWLAGN_WOWLAN_WAKEUP_PATTERN_MATCH);
1106
1107        if (wowlan->rfkill_release)
1108                d3_cfg_cmd.wakeup_flags |=
1109                        cpu_to_le32(IWLAGN_D3_WAKEUP_RFKILL);
1110
1111        iwl_scan_cancel_timeout(priv, 200);
1112
1113        memcpy(&rxon, &ctx->active, sizeof(rxon));
1114
1115        priv->ucode_loaded = false;
1116        iwl_trans_stop_device(priv->trans);
1117        ret = iwl_trans_start_hw(priv->trans);
1118        if (ret)
1119                goto out;
1120
1121        priv->wowlan = true;
1122
1123        ret = iwl_load_ucode_wait_alive(priv, IWL_UCODE_WOWLAN);
1124        if (ret)
1125                goto out;
1126
1127        /* now configure WoWLAN ucode */
1128        ret = iwl_alive_start(priv);
1129        if (ret)
1130                goto out;
1131
1132        memcpy(&ctx->staging, &rxon, sizeof(rxon));
1133        ret = iwlagn_commit_rxon(priv, ctx);
1134        if (ret)
1135                goto out;
1136
1137        ret = iwl_power_update_mode(priv, true);
1138        if (ret)
1139                goto out;
1140
1141        if (!iwlwifi_mod_params.swcrypto) {
1142                /* mark all keys clear */
1143                priv->ucode_key_table = 0;
1144                ctx->key_mapping_keys = 0;
1145
1146                /*
1147                 * This needs to be unlocked due to lock ordering
1148                 * constraints. Since we're in the suspend path
1149                 * that isn't really a problem though.
1150                 */
1151                mutex_unlock(&priv->mutex);
1152                ieee80211_iter_keys(priv->hw, ctx->vif,
1153                                    iwlagn_wowlan_program_keys,
1154                                    &key_data);
1155                mutex_lock(&priv->mutex);
1156                if (key_data.error) {
1157                        ret = -EIO;
1158                        goto out;
1159                }
1160
1161                if (key_data.use_rsc_tsc) {
1162                        struct iwl_host_cmd rsc_tsc_cmd = {
1163                                .id = REPLY_WOWLAN_TSC_RSC_PARAMS,
1164                                .data[0] = key_data.rsc_tsc,
1165                                .dataflags[0] = IWL_HCMD_DFL_NOCOPY,
1166                                .len[0] = sizeof(*key_data.rsc_tsc),
1167                        };
1168
1169                        ret = iwl_dvm_send_cmd(priv, &rsc_tsc_cmd);
1170                        if (ret)
1171                                goto out;
1172                }
1173
1174                if (key_data.use_tkip) {
1175                        ret = iwl_dvm_send_cmd_pdu(priv,
1176                                                 REPLY_WOWLAN_TKIP_PARAMS,
1177                                                 0, sizeof(tkip_cmd),
1178                                                 &tkip_cmd);
1179                        if (ret)
1180                                goto out;
1181                }
1182
1183                if (priv->have_rekey_data) {
1184                        memset(&kek_kck_cmd, 0, sizeof(kek_kck_cmd));
1185                        memcpy(kek_kck_cmd.kck, priv->kck, NL80211_KCK_LEN);
1186                        kek_kck_cmd.kck_len = cpu_to_le16(NL80211_KCK_LEN);
1187                        memcpy(kek_kck_cmd.kek, priv->kek, NL80211_KEK_LEN);
1188                        kek_kck_cmd.kek_len = cpu_to_le16(NL80211_KEK_LEN);
1189                        kek_kck_cmd.replay_ctr = priv->replay_ctr;
1190
1191                        ret = iwl_dvm_send_cmd_pdu(priv,
1192                                                 REPLY_WOWLAN_KEK_KCK_MATERIAL,
1193                                                 0, sizeof(kek_kck_cmd),
1194                                                 &kek_kck_cmd);
1195                        if (ret)
1196                                goto out;
1197                }
1198        }
1199
1200        ret = iwl_dvm_send_cmd_pdu(priv, REPLY_D3_CONFIG, 0,
1201                                     sizeof(d3_cfg_cmd), &d3_cfg_cmd);
1202        if (ret)
1203                goto out;
1204
1205        ret = iwl_dvm_send_cmd_pdu(priv, REPLY_WOWLAN_WAKEUP_FILTER,
1206                                 0, sizeof(wakeup_filter_cmd),
1207                                 &wakeup_filter_cmd);
1208        if (ret)
1209                goto out;
1210
1211        ret = iwlagn_send_patterns(priv, wowlan);
1212 out:
1213        kfree(key_data.rsc_tsc);
1214        return ret;
1215}
1216#endif
1217
1218int iwl_dvm_send_cmd(struct iwl_priv *priv, struct iwl_host_cmd *cmd)
1219{
1220        if (iwl_is_rfkill(priv) || iwl_is_ctkill(priv)) {
1221                IWL_WARN(priv, "Not sending command - %s KILL\n",
1222                         iwl_is_rfkill(priv) ? "RF" : "CT");
1223                return -EIO;
1224        }
1225
1226        if (test_bit(STATUS_FW_ERROR, &priv->status)) {
1227                IWL_ERR(priv, "Command %s failed: FW Error\n",
1228                        iwl_get_cmd_string(priv->trans, cmd->id));
1229                return -EIO;
1230        }
1231
1232        /*
1233         * This can happen upon FW ASSERT: we clear the STATUS_FW_ERROR flag
1234         * in iwl_down but cancel the workers only later.
1235         */
1236        if (!priv->ucode_loaded) {
1237                IWL_ERR(priv, "Fw not loaded - dropping CMD: %x\n", cmd->id);
1238                return -EIO;
1239        }
1240
1241        /*
1242         * Synchronous commands from this op-mode must hold
1243         * the mutex, this ensures we don't try to send two
1244         * (or more) synchronous commands at a time.
1245         */
1246        if (!(cmd->flags & CMD_ASYNC))
1247                lockdep_assert_held(&priv->mutex);
1248
1249        return iwl_trans_send_cmd(priv->trans, cmd);
1250}
1251
1252int iwl_dvm_send_cmd_pdu(struct iwl_priv *priv, u8 id,
1253                         u32 flags, u16 len, const void *data)
1254{
1255        struct iwl_host_cmd cmd = {
1256                .id = id,
1257                .len = { len, },
1258                .data = { data, },
1259                .flags = flags,
1260        };
1261
1262        return iwl_dvm_send_cmd(priv, &cmd);
1263}
1264