/****************************************************************************** * * Copyright(c) 2003 - 2014 Intel Corporation. All rights reserved. * * Portions of this file are derived from the ipw3945 project, as well * as portions of the ieee80211 subsystem header files. * * This program is free software; you can redistribute it and/or modify it * under the terms of version 2 of the GNU General Public License as * published by the Free Software Foundation. * * This program is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for * more details. * * You should have received a copy of the GNU General Public License along with * this program; if not, write to the Free Software Foundation, Inc., * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA * * The full GNU General Public License is included in this distribution in the * file called LICENSE. * * Contact Information: * Intel Linux Wireless * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 * *****************************************************************************/ #include #include #include "iwl-trans.h" #include "dev.h" #include "agn.h" const u8 iwl_bcast_addr[ETH_ALEN] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF }; static int iwl_sta_ucode_activate(struct iwl_priv *priv, u8 sta_id) { lockdep_assert_held(&priv->sta_lock); if (sta_id >= IWLAGN_STATION_COUNT) { IWL_ERR(priv, "invalid sta_id %u", sta_id); return -EINVAL; } if (!(priv->stations[sta_id].used & IWL_STA_DRIVER_ACTIVE)) IWL_ERR(priv, "ACTIVATE a non DRIVER active station id %u " "addr %pM\n", sta_id, priv->stations[sta_id].sta.sta.addr); if (priv->stations[sta_id].used & IWL_STA_UCODE_ACTIVE) { IWL_DEBUG_ASSOC(priv, "STA id %u addr %pM already present in uCode " "(according to driver)\n", sta_id, priv->stations[sta_id].sta.sta.addr); } else { priv->stations[sta_id].used |= IWL_STA_UCODE_ACTIVE; IWL_DEBUG_ASSOC(priv, "Added STA id %u addr %pM to uCode\n", sta_id, priv->stations[sta_id].sta.sta.addr); } return 0; } static int iwl_process_add_sta_resp(struct iwl_priv *priv, struct iwl_addsta_cmd *addsta, struct iwl_rx_packet *pkt) { struct iwl_add_sta_resp *add_sta_resp = (void *)pkt->data; u8 sta_id = addsta->sta.sta_id; int ret = -EIO; if (pkt->hdr.flags & IWL_CMD_FAILED_MSK) { IWL_ERR(priv, "Bad return from REPLY_ADD_STA (0x%08X)\n", pkt->hdr.flags); return ret; } IWL_DEBUG_INFO(priv, "Processing response for adding station %u\n", sta_id); spin_lock_bh(&priv->sta_lock); switch (add_sta_resp->status) { case ADD_STA_SUCCESS_MSK: IWL_DEBUG_INFO(priv, "REPLY_ADD_STA PASSED\n"); ret = iwl_sta_ucode_activate(priv, sta_id); break; case ADD_STA_NO_ROOM_IN_TABLE: IWL_ERR(priv, "Adding station %d failed, no room in table.\n", sta_id); break; case ADD_STA_NO_BLOCK_ACK_RESOURCE: IWL_ERR(priv, "Adding station %d failed, no block ack " "resource.\n", sta_id); break; case ADD_STA_MODIFY_NON_EXIST_STA: IWL_ERR(priv, "Attempting to modify non-existing station %d\n", sta_id); break; default: IWL_DEBUG_ASSOC(priv, "Received REPLY_ADD_STA:(0x%08X)\n", add_sta_resp->status); break; } IWL_DEBUG_INFO(priv, "%s station id %u addr %pM\n", priv->stations[sta_id].sta.mode == STA_CONTROL_MODIFY_MSK ? "Modified" : "Added", sta_id, priv->stations[sta_id].sta.sta.addr); /* * XXX: The MAC address in the command buffer is often changed from * the original sent to the device. That is, the MAC address * written to the command buffer often is not the same MAC address * read from the command buffer when the command returns. This * issue has not yet been resolved and this debugging is left to * observe the problem. */ IWL_DEBUG_INFO(priv, "%s station according to cmd buffer %pM\n", priv->stations[sta_id].sta.mode == STA_CONTROL_MODIFY_MSK ? "Modified" : "Added", addsta->sta.addr); spin_unlock_bh(&priv->sta_lock); return ret; } int iwl_add_sta_callback(struct iwl_priv *priv, struct iwl_rx_cmd_buffer *rxb, struct iwl_device_cmd *cmd) { struct iwl_rx_packet *pkt = rxb_addr(rxb); if (!cmd) return 0; return iwl_process_add_sta_resp(priv, (void *)cmd->payload, pkt); } int iwl_send_add_sta(struct iwl_priv *priv, struct iwl_addsta_cmd *sta, u8 flags) { int ret = 0; struct iwl_host_cmd cmd = { .id = REPLY_ADD_STA, .flags = flags, .data = { sta, }, .len = { sizeof(*sta), }, }; u8 sta_id __maybe_unused = sta->sta.sta_id; IWL_DEBUG_INFO(priv, "Adding sta %u (%pM) %ssynchronously\n", sta_id, sta->sta.addr, flags & CMD_ASYNC ? "a" : ""); if (!(flags & CMD_ASYNC)) { cmd.flags |= CMD_WANT_SKB; might_sleep(); } ret = iwl_dvm_send_cmd(priv, &cmd); if (ret || (flags & CMD_ASYNC)) return ret; /*else the command was successfully sent in SYNC mode, need to free * the reply page */ iwl_free_resp(&cmd); if (cmd.handler_status) IWL_ERR(priv, "%s - error in the CMD response %d", __func__, cmd.handler_status); return cmd.handler_status; } bool iwl_is_ht40_tx_allowed(struct iwl_priv *priv, struct iwl_rxon_context *ctx, struct ieee80211_sta *sta) { if (!ctx->ht.enabled || !ctx->ht.is_40mhz) return false; #ifdef CONFIG_IWLWIFI_DEBUGFS if (priv->disable_ht40) return false; #endif /* special case for RXON */ if (!sta) return true; return sta->bandwidth >= IEEE80211_STA_RX_BW_40; } static void iwl_sta_calc_ht_flags(struct iwl_priv *priv, struct ieee80211_sta *sta, struct iwl_rxon_context *ctx, __le32 *flags, __le32 *mask) { struct ieee80211_sta_ht_cap *sta_ht_inf = &sta->ht_cap; *mask = STA_FLG_RTS_MIMO_PROT_MSK | STA_FLG_MIMO_DIS_MSK | STA_FLG_HT40_EN_MSK | STA_FLG_MAX_AGG_SIZE_MSK | STA_FLG_AGG_MPDU_DENSITY_MSK; *flags = 0; if (!sta || !sta_ht_inf->ht_supported) return; IWL_DEBUG_INFO(priv, "STA %pM SM PS mode: %s\n", sta->addr, (sta->smps_mode == IEEE80211_SMPS_STATIC) ? "static" : (sta->smps_mode == IEEE80211_SMPS_DYNAMIC) ? "dynamic" : "disabled"); switch (sta->smps_mode) { case IEEE80211_SMPS_STATIC: *flags |= STA_FLG_MIMO_DIS_MSK; break; case IEEE80211_SMPS_DYNAMIC: *flags |= STA_FLG_RTS_MIMO_PROT_MSK; break; case IEEE80211_SMPS_OFF: break; default: IWL_WARN(priv, "Invalid MIMO PS mode %d\n", sta->smps_mode); break; } *flags |= cpu_to_le32( (u32)sta_ht_inf->ampdu_factor << STA_FLG_MAX_AGG_SIZE_POS); *flags |= cpu_to_le32( (u32)sta_ht_inf->ampdu_density << STA_FLG_AGG_MPDU_DENSITY_POS); if (iwl_is_ht40_tx_allowed(priv, ctx, sta)) *flags |= STA_FLG_HT40_EN_MSK; } int iwl_sta_update_ht(struct iwl_priv *priv, struct iwl_rxon_context *ctx, struct ieee80211_sta *sta) { u8 sta_id = iwl_sta_id(sta); __le32 flags, mask; struct iwl_addsta_cmd cmd; if (WARN_ON_ONCE(sta_id == IWL_INVALID_STATION)) return -EINVAL; iwl_sta_calc_ht_flags(priv, sta, ctx, &flags, &mask); spin_lock_bh(&priv->sta_lock); priv->stations[sta_id].sta.station_flags &= ~mask; priv->stations[sta_id].sta.station_flags |= flags; spin_unlock_bh(&priv->sta_lock); memset(&cmd, 0, sizeof(cmd)); cmd.mode = STA_CONTROL_MODIFY_MSK; cmd.station_flags_msk = mask; cmd.station_flags = flags; cmd.sta.sta_id = sta_id; return iwl_send_add_sta(priv, &cmd, CMD_SYNC); } static void iwl_set_ht_add_station(struct iwl_priv *priv, u8 index, struct ieee80211_sta *sta, struct iwl_rxon_context *ctx) { __le32 flags, mask; iwl_sta_calc_ht_flags(priv, sta, ctx, &flags, &mask); lockdep_assert_held(&priv->sta_lock); priv->stations[index].sta.station_flags &= ~mask; priv->stations[index].sta.station_flags |= flags; } /** * iwl_prep_station - Prepare station information for addition * * should be called with sta_lock held */ u8 iwl_prep_station(struct iwl_priv *priv, struct iwl_rxon_context *ctx, const u8 *addr, bool is_ap, struct ieee80211_sta *sta) { struct iwl_station_entry *station; int i; u8 sta_id = IWL_INVALID_STATION; if (is_ap) sta_id = ctx->ap_sta_id; else if (is_broadcast_ether_addr(addr)) sta_id = ctx->bcast_sta_id; else for (i = IWL_STA_ID; i < IWLAGN_STATION_COUNT; i++) { if (ether_addr_equal(priv->stations[i].sta.sta.addr, addr)) { sta_id = i; break; } if (!priv->stations[i].used && sta_id == IWL_INVALID_STATION) sta_id = i; } /* * These two conditions have the same outcome, but keep them * separate */ if (unlikely(sta_id == IWL_INVALID_STATION)) return sta_id; /* * uCode is not able to deal with multiple requests to add a * station. Keep track if one is in progress so that we do not send * another. */ if (priv->stations[sta_id].used & IWL_STA_UCODE_INPROGRESS) { IWL_DEBUG_INFO(priv, "STA %d already in process of being " "added.\n", sta_id); return sta_id; } if ((priv->stations[sta_id].used & IWL_STA_DRIVER_ACTIVE) && (priv->stations[sta_id].used & IWL_STA_UCODE_ACTIVE) && ether_addr_equal(priv->stations[sta_id].sta.sta.addr, addr)) { IWL_DEBUG_ASSOC(priv, "STA %d (%pM) already added, not " "adding again.\n", sta_id, addr); return sta_id; } station = &priv->stations[sta_id]; station->used = IWL_STA_DRIVER_ACTIVE; IWL_DEBUG_ASSOC(priv, "Add STA to driver ID %d: %pM\n", sta_id, addr); priv->num_stations++; /* Set up the REPLY_ADD_STA command to send to device */ memset(&station->sta, 0, sizeof(struct iwl_addsta_cmd)); memcpy(station->sta.sta.addr, addr, ETH_ALEN); station->sta.mode = 0; station->sta.sta.sta_id = sta_id; station->sta.station_flags = ctx->station_flags; station->ctxid = ctx->ctxid; if (sta) { struct iwl_station_priv *sta_priv; sta_priv = (void *)sta->drv_priv; sta_priv->ctx = ctx; } /* * OK to call unconditionally, since local stations (IBSS BSSID * STA and broadcast STA) pass in a NULL sta, and mac80211 * doesn't allow HT IBSS. */ iwl_set_ht_add_station(priv, sta_id, sta, ctx); return sta_id; } #define STA_WAIT_TIMEOUT (HZ/2) /** * iwl_add_station_common - */ int iwl_add_station_common(struct iwl_priv *priv, struct iwl_rxon_context *ctx, const u8 *addr, bool is_ap, struct ieee80211_sta *sta, u8 *sta_id_r) { int ret = 0; u8 sta_id; struct iwl_addsta_cmd sta_cmd; *sta_id_r = 0; spin_lock_bh(&priv->sta_lock); sta_id = iwl_prep_station(priv, ctx, addr, is_ap, sta); if (sta_id == IWL_INVALID_STATION) { IWL_ERR(priv, "Unable to prepare station %pM for addition\n", addr); spin_unlock_bh(&priv->sta_lock); return -EINVAL; } /* * uCode is not able to deal with multiple requests to add a * station. Keep track if one is in progress so that we do not send * another. */ if (priv->stations[sta_id].used & IWL_STA_UCODE_INPROGRESS) { IWL_DEBUG_INFO(priv, "STA %d already in process of being " "added.\n", sta_id); spin_unlock_bh(&priv->sta_lock); return -EEXIST; } if ((priv->stations[sta_id].used & IWL_STA_DRIVER_ACTIVE) && (priv->stations[sta_id].used & IWL_STA_UCODE_ACTIVE)) { IWL_DEBUG_ASSOC(priv, "STA %d (%pM) already added, not " "adding again.\n", sta_id, addr); spin_unlock_bh(&priv->sta_lock); return -EEXIST; } priv->stations[sta_id].used |= IWL_STA_UCODE_INPROGRESS; memcpy(&sta_cmd, &priv->stations[sta_id].sta, sizeof(struct iwl_addsta_cmd)); spin_unlock_bh(&priv->sta_lock); /* Add station to device's station table */ ret = iwl_send_add_sta(priv, &sta_cmd, CMD_SYNC); if (ret) { spin_lock_bh(&priv->sta_lock); IWL_ERR(priv, "Adding station %pM failed.\n", priv->stations[sta_id].sta.sta.addr); priv->stations[sta_id].used &= ~IWL_STA_DRIVER_ACTIVE; priv->stations[sta_id].used &= ~IWL_STA_UCODE_INPROGRESS; spin_unlock_bh(&priv->sta_lock); } *sta_id_r = sta_id; return ret; } /** * iwl_sta_ucode_deactivate - deactivate ucode status for a station */ static void iwl_sta_ucode_deactivate(struct iwl_priv *priv, u8 sta_id) { lockdep_assert_held(&priv->sta_lock); /* Ucode must be active and driver must be non active */ if ((priv->stations[sta_id].used & (IWL_STA_UCODE_ACTIVE | IWL_STA_DRIVER_ACTIVE)) != IWL_STA_UCODE_ACTIVE) IWL_ERR(priv, "removed non active STA %u\n", sta_id); priv->stations[sta_id].used &= ~IWL_STA_UCODE_ACTIVE; memset(&priv->stations[sta_id], 0, sizeof(struct iwl_station_entry)); IWL_DEBUG_ASSOC(priv, "Removed STA %u\n", sta_id); } static int iwl_send_remove_station(struct iwl_priv *priv, const u8 *addr, int sta_id, bool temporary) { struct iwl_rx_packet *pkt; int ret; struct iwl_rem_sta_cmd rm_sta_cmd; struct iwl_host_cmd cmd = { .id = REPLY_REMOVE_STA, .len = { sizeof(struct iwl_rem_sta_cmd), }, .flags = CMD_SYNC, .data = { &rm_sta_cmd, }, }; memset(&rm_sta_cmd, 0, sizeof(rm_sta_cmd)); rm_sta_cmd.num_sta = 1; memcpy(&rm_sta_cmd.addr, addr, ETH_ALEN); cmd.flags |= CMD_WANT_SKB; ret = iwl_dvm_send_cmd(priv, &cmd); if (ret) return ret; pkt = cmd.resp_pkt; if (pkt->hdr.flags & IWL_CMD_FAILED_MSK) { IWL_ERR(priv, "Bad return from REPLY_REMOVE_STA (0x%08X)\n", pkt->hdr.flags); ret = -EIO; } if (!ret) { struct iwl_rem_sta_resp *rem_sta_resp = (void *)pkt->data; switch (rem_sta_resp->status) { case REM_STA_SUCCESS_MSK: if (!temporary) { spin_lock_bh(&priv->sta_lock); iwl_sta_ucode_deactivate(priv, sta_id); spin_unlock_bh(&priv->sta_lock); } IWL_DEBUG_ASSOC(priv, "REPLY_REMOVE_STA PASSED\n"); break; default: ret = -EIO; IWL_ERR(priv, "REPLY_REMOVE_STA failed\n"); break; } } iwl_free_resp(&cmd); return ret; } /** * iwl_remove_station - Remove driver's knowledge of station. */ int iwl_remove_station(struct iwl_priv *priv, const u8 sta_id, const u8 *addr) { u8 tid; if (!iwl_is_ready(priv)) { IWL_DEBUG_INFO(priv, "Unable to remove station %pM, device not ready.\n", addr); /* * It is typical for stations to be removed when we are * going down. Return success since device will be down * soon anyway */ return 0; } IWL_DEBUG_ASSOC(priv, "Removing STA from driver:%d %pM\n", sta_id, addr); if (WARN_ON(sta_id == IWL_INVALID_STATION)) return -EINVAL; spin_lock_bh(&priv->sta_lock); if (!(priv->stations[sta_id].used & IWL_STA_DRIVER_ACTIVE)) { IWL_DEBUG_INFO(priv, "Removing %pM but non DRIVER active\n", addr); goto out_err; } if (!(priv->stations[sta_id].used & IWL_STA_UCODE_ACTIVE)) { IWL_DEBUG_INFO(priv, "Removing %pM but non UCODE active\n", addr); goto out_err; } if (priv->stations[sta_id].used & IWL_STA_LOCAL) { kfree(priv->stations[sta_id].lq); priv->stations[sta_id].lq = NULL; } for (tid = 0; tid < IWL_MAX_TID_COUNT; tid++) memset(&priv->tid_data[sta_id][tid], 0, sizeof(priv->tid_data[sta_id][tid])); priv->stations[sta_id].used &= ~IWL_STA_DRIVER_ACTIVE; priv->num_stations--; if (WARN_ON(priv->num_stations < 0)) priv->num_stations = 0; spin_unlock_bh(&priv->sta_lock); return iwl_send_remove_station(priv, addr, sta_id, false); out_err: spin_unlock_bh(&priv->sta_lock); return -EINVAL; } void iwl_deactivate_station(struct iwl_priv *priv, const u8 sta_id, const u8 *addr) { u8 tid; if (!iwl_is_ready(priv)) { IWL_DEBUG_INFO(priv, "Unable to remove station %pM, device not ready.\n", addr); return; } IWL_DEBUG_ASSOC(priv, "Deactivating STA: %pM (%d)\n", addr, sta_id); if (WARN_ON_ONCE(sta_id == IWL_INVALID_STATION)) return; spin_lock_bh(&priv->sta_lock); WARN_ON_ONCE(!(priv->stations[sta_id].used & IWL_STA_DRIVER_ACTIVE)); for (tid = 0; tid < IWL_MAX_TID_COUNT; tid++) memset(&priv->tid_data[sta_id][tid], 0, sizeof(priv->tid_data[sta_id][tid])); priv->stations[sta_id].used &= ~IWL_STA_DRIVER_ACTIVE; priv->num_stations--; if (WARN_ON_ONCE(priv->num_stations < 0)) priv->num_stations = 0; spin_unlock_bh(&priv->sta_lock); } static void iwl_sta_fill_lq(struct iwl_priv *priv, struct iwl_rxon_context *ctx, u8 sta_id, struct iwl_link_quality_cmd *link_cmd) { int i, r; u32 rate_flags = 0; __le32 rate_n_flags; lockdep_assert_held(&priv->mutex); memset(link_cmd, 0, sizeof(*link_cmd)); /* Set up the rate scaling to start at selected rate, fall back * all the way down to 1M in IEEE order, and then spin on 1M */ if (priv->band == IEEE80211_BAND_5GHZ) r = IWL_RATE_6M_INDEX; else if (ctx && ctx->vif && ctx->vif->p2p) r = IWL_RATE_6M_INDEX; else r = IWL_RATE_1M_INDEX; if (r >= IWL_FIRST_CCK_RATE && r <= IWL_LAST_CCK_RATE) rate_flags |= RATE_MCS_CCK_MSK; rate_flags |= first_antenna(priv->nvm_data->valid_tx_ant) << RATE_MCS_ANT_POS; rate_n_flags = iwl_hw_set_rate_n_flags(iwl_rates[r].plcp, rate_flags); for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++) link_cmd->rs_table[i].rate_n_flags = rate_n_flags; link_cmd->general_params.single_stream_ant_msk = first_antenna(priv->nvm_data->valid_tx_ant); link_cmd->general_params.dual_stream_ant_msk = priv->nvm_data->valid_tx_ant & ~first_antenna(priv->nvm_data->valid_tx_ant); if (!link_cmd->general_params.dual_stream_ant_msk) { link_cmd->general_params.dual_stream_ant_msk = ANT_AB; } else if (num_of_ant(priv->nvm_data->valid_tx_ant) == 2) { link_cmd->general_params.dual_stream_ant_msk = priv->nvm_data->valid_tx_ant; } link_cmd->agg_params.agg_dis_start_th = LINK_QUAL_AGG_DISABLE_START_DEF; link_cmd->agg_params.agg_time_limit = cpu_to_le16(LINK_QUAL_AGG_TIME_LIMIT_DEF); link_cmd->sta_id = sta_id; } /** * iwl_clear_ucode_stations - clear ucode station table bits * * This function clears all the bits in the driver indicating * which stations are active in the ucode. Call when something * other than explicit station management would cause this in * the ucode, e.g. unassociated RXON. */ void iwl_clear_ucode_stations(struct iwl_priv *priv, struct iwl_rxon_context *ctx) { int i; bool cleared = false; IWL_DEBUG_INFO(priv, "Clearing ucode stations in driver\n"); spin_lock_bh(&priv->sta_lock); for (i = 0; i < IWLAGN_STATION_COUNT; i++) { if (ctx && ctx->ctxid != priv->stations[i].ctxid) continue; if (priv->stations[i].used & IWL_STA_UCODE_ACTIVE) { IWL_DEBUG_INFO(priv, "Clearing ucode active for station %d\n", i); priv->stations[i].used &= ~IWL_STA_UCODE_ACTIVE; cleared = true; } } spin_unlock_bh(&priv->sta_lock); if (!cleared) IWL_DEBUG_INFO(priv, "No active stations found to be cleared\n"); } /** * iwl_restore_stations() - Restore driver known stations to device * * All stations considered active by driver, but not present in ucode, is * restored. * * Function sleeps. */ void iwl_restore_stations(struct iwl_priv *priv, struct iwl_rxon_context *ctx) { struct iwl_addsta_cmd sta_cmd; static const struct iwl_link_quality_cmd zero_lq = {}; struct iwl_link_quality_cmd lq; int i; bool found = false; int ret; bool send_lq; if (!iwl_is_ready(priv)) { IWL_DEBUG_INFO(priv, "Not ready yet, not restoring any stations.\n"); return; } IWL_DEBUG_ASSOC(priv, "Restoring all known stations ... start.\n"); spin_lock_bh(&priv->sta_lock); for (i = 0; i < IWLAGN_STATION_COUNT; i++) { if (ctx->ctxid != priv->stations[i].ctxid) continue; if ((priv->stations[i].used & IWL_STA_DRIVER_ACTIVE) && !(priv->stations[i].used & IWL_STA_UCODE_ACTIVE)) { IWL_DEBUG_ASSOC(priv, "Restoring sta %pM\n", priv->stations[i].sta.sta.addr); priv->stations[i].sta.mode = 0; priv->stations[i].used |= IWL_STA_UCODE_INPROGRESS; found = true; } } for (i = 0; i < IWLAGN_STATION_COUNT; i++) { if ((priv->stations[i].used & IWL_STA_UCODE_INPROGRESS)) { memcpy(&sta_cmd, &priv->stations[i].sta, sizeof(struct iwl_addsta_cmd)); send_lq = false; if (priv->stations[i].lq) { if (priv->wowlan) iwl_sta_fill_lq(priv, ctx, i, &lq); else memcpy(&lq, priv->stations[i].lq, sizeof(struct iwl_link_quality_cmd)); if (memcmp(&lq, &zero_lq, sizeof(lq))) send_lq = true; } spin_unlock_bh(&priv->sta_lock); ret = iwl_send_add_sta(priv, &sta_cmd, CMD_SYNC); if (ret) { spin_lock_bh(&priv->sta_lock); IWL_ERR(priv, "Adding station %pM failed.\n", priv->stations[i].sta.sta.addr); priv->stations[i].used &= ~IWL_STA_DRIVER_ACTIVE; priv->stations[i].used &= ~IWL_STA_UCODE_INPROGRESS; continue; } /* * Rate scaling has already been initialized, send * current LQ command */ if (send_lq) iwl_send_lq_cmd(priv, ctx, &lq, CMD_SYNC, true); spin_lock_bh(&priv->sta_lock); priv->stations[i].used &= ~IWL_STA_UCODE_INPROGRESS; } } spin_unlock_bh(&priv->sta_lock); if (!found) IWL_DEBUG_INFO(priv, "Restoring all known stations .... " "no stations to be restored.\n"); else IWL_DEBUG_INFO(priv, "Restoring all known stations .... " "complete.\n"); } int iwl_get_free_ucode_key_offset(struct iwl_priv *priv) { int i; for (i = 0; i < priv->sta_key_max_num; i++) if (!test_and_set_bit(i, &priv->ucode_key_table)) return i; return WEP_INVALID_OFFSET; } void iwl_dealloc_bcast_stations(struct iwl_priv *priv) { int i; spin_lock_bh(&priv->sta_lock); for (i = 0; i < IWLAGN_STATION_COUNT; i++) { if (!(priv->stations[i].used & IWL_STA_BCAST)) continue; priv->stations[i].used &= ~IWL_STA_UCODE_ACTIVE; priv->num_stations--; if (WARN_ON(priv->num_stations < 0)) priv->num_stations = 0; kfree(priv->stations[i].lq); priv->stations[i].lq = NULL; } spin_unlock_bh(&priv->sta_lock); } #ifdef CONFIG_IWLWIFI_DEBUG static void iwl_dump_lq_cmd(struct iwl_priv *priv, struct iwl_link_quality_cmd *lq) { int i; IWL_DEBUG_RATE(priv, "lq station id 0x%x\n", lq->sta_id); IWL_DEBUG_RATE(priv, "lq ant 0x%X 0x%X\n", lq->general_params.single_stream_ant_msk, lq->general_params.dual_stream_ant_msk); for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++) IWL_DEBUG_RATE(priv, "lq index %d 0x%X\n", i, lq->rs_table[i].rate_n_flags); } #else static inline void iwl_dump_lq_cmd(struct iwl_priv *priv, struct iwl_link_quality_cmd *lq) { } #endif /** * is_lq_table_valid() - Test one aspect of LQ cmd for validity * * It sometimes happens when a HT rate has been in use and we * loose connectivity with AP then mac80211 will first tell us that the * current channel is not HT anymore before removing the station. In such a * scenario the RXON flags will be updated to indicate we are not * communicating HT anymore, but the LQ command may still contain HT rates. * Test for this to prevent driver from sending LQ command between the time * RXON flags are updated and when LQ command is updated. */ static bool is_lq_table_valid(struct iwl_priv *priv, struct iwl_rxon_context *ctx, struct iwl_link_quality_cmd *lq) { int i; if (ctx->ht.enabled) return true; IWL_DEBUG_INFO(priv, "Channel %u is not an HT channel\n", ctx->active.channel); for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++) { if (le32_to_cpu(lq->rs_table[i].rate_n_flags) & RATE_MCS_HT_MSK) { IWL_DEBUG_INFO(priv, "index %d of LQ expects HT channel\n", i); return false; } } return true; } /** * iwl_send_lq_cmd() - Send link quality command * @init: This command is sent as part of station initialization right * after station has been added. * * The link quality command is sent as the last step of station creation. * This is the special case in which init is set and we call a callback in * this case to clear the state indicating that station creation is in * progress. */ int iwl_send_lq_cmd(struct iwl_priv *priv, struct iwl_rxon_context *ctx, struct iwl_link_quality_cmd *lq, u8 flags, bool init) { int ret = 0; struct iwl_host_cmd cmd = { .id = REPLY_TX_LINK_QUALITY_CMD, .len = { sizeof(struct iwl_link_quality_cmd), }, .flags = flags, .data = { lq, }, }; if (WARN_ON(lq->sta_id == IWL_INVALID_STATION)) return -EINVAL; spin_lock_bh(&priv->sta_lock); if (!(priv->stations[lq->sta_id].used & IWL_STA_DRIVER_ACTIVE)) { spin_unlock_bh(&priv->sta_lock); return -EINVAL; } spin_unlock_bh(&priv->sta_lock); iwl_dump_lq_cmd(priv, lq); if (WARN_ON(init && (cmd.flags & CMD_ASYNC))) return -EINVAL; if (is_lq_table_valid(priv, ctx, lq)) ret = iwl_dvm_send_cmd(priv, &cmd); else ret = -EINVAL; if (cmd.flags & CMD_ASYNC) return ret; if (init) { IWL_DEBUG_INFO(priv, "init LQ command complete, " "clearing sta addition status for sta %d\n", lq->sta_id); spin_lock_bh(&priv->sta_lock); priv->stations[lq->sta_id].used &= ~IWL_STA_UCODE_INPROGRESS; spin_unlock_bh(&priv->sta_lock); } return ret; } static struct iwl_link_quality_cmd * iwl_sta_alloc_lq(struct iwl_priv *priv, struct iwl_rxon_context *ctx, u8 sta_id) { struct iwl_link_quality_cmd *link_cmd; link_cmd = kzalloc(sizeof(struct iwl_link_quality_cmd), GFP_KERNEL); if (!link_cmd) { IWL_ERR(priv, "Unable to allocate memory for LQ cmd.\n"); return NULL; } iwl_sta_fill_lq(priv, ctx, sta_id, link_cmd); return link_cmd; } /* * iwlagn_add_bssid_station - Add the special IBSS BSSID station * * Function sleeps. */ int iwlagn_add_bssid_station(struct iwl_priv *priv, struct iwl_rxon_context *ctx, const u8 *addr, u8 *sta_id_r) { int ret; u8 sta_id; struct iwl_link_quality_cmd *link_cmd; if (sta_id_r) *sta_id_r = IWL_INVALID_STATION; ret = iwl_add_station_common(priv, ctx, addr, 0, NULL, &sta_id); if (ret) { IWL_ERR(priv, "Unable to add station %pM\n", addr); return ret; } if (sta_id_r) *sta_id_r = sta_id; spin_lock_bh(&priv->sta_lock); priv->stations[sta_id].used |= IWL_STA_LOCAL; spin_unlock_bh(&priv->sta_lock); /* Set up default rate scaling table in device's station table */ link_cmd = iwl_sta_alloc_lq(priv, ctx, sta_id); if (!link_cmd) { IWL_ERR(priv, "Unable to initialize rate scaling for station %pM.\n", addr); return -ENOMEM; } ret = iwl_send_lq_cmd(priv, ctx, link_cmd, CMD_SYNC, true); if (ret) IWL_ERR(priv, "Link quality command failed (%d)\n", ret); spin_lock_bh(&priv->sta_lock); priv->stations[sta_id].lq = link_cmd; spin_unlock_bh(&priv->sta_lock); return 0; } /* * static WEP keys * * For each context, the device has a table of 4 static WEP keys * (one for each key index) that is updated with the following * commands. */ static int iwl_send_static_wepkey_cmd(struct iwl_priv *priv, struct iwl_rxon_context *ctx, bool send_if_empty) { int i, not_empty = 0; u8 buff[sizeof(struct iwl_wep_cmd) + sizeof(struct iwl_wep_key) * WEP_KEYS_MAX]; struct iwl_wep_cmd *wep_cmd = (struct iwl_wep_cmd *)buff; size_t cmd_size = sizeof(struct iwl_wep_cmd); struct iwl_host_cmd cmd = { .id = ctx->wep_key_cmd, .data = { wep_cmd, }, .flags = CMD_SYNC, }; might_sleep(); memset(wep_cmd, 0, cmd_size + (sizeof(struct iwl_wep_key) * WEP_KEYS_MAX)); for (i = 0; i < WEP_KEYS_MAX ; i++) { wep_cmd->key[i].key_index = i; if (ctx->wep_keys[i].key_size) { wep_cmd->key[i].key_offset = i; not_empty = 1; } else { wep_cmd->key[i].key_offset = WEP_INVALID_OFFSET; } wep_cmd->key[i].key_size = ctx->wep_keys[i].key_size; memcpy(&wep_cmd->key[i].key[3], ctx->wep_keys[i].key, ctx->wep_keys[i].key_size); } wep_cmd->global_key_type = WEP_KEY_WEP_TYPE; wep_cmd->num_keys = WEP_KEYS_MAX; cmd_size += sizeof(struct iwl_wep_key) * WEP_KEYS_MAX; cmd.len[0] = cmd_size; if (not_empty || send_if_empty) return iwl_dvm_send_cmd(priv, &cmd); else return 0; } int iwl_restore_default_wep_keys(struct iwl_priv *priv, struct iwl_rxon_context *ctx) { lockdep_assert_held(&priv->mutex); return iwl_send_static_wepkey_cmd(priv, ctx, false); } int iwl_remove_default_wep_key(struct iwl_priv *priv, struct iwl_rxon_context *ctx, struct ieee80211_key_conf *keyconf) { int ret; lockdep_assert_held(&priv->mutex); IWL_DEBUG_WEP(priv, "Removing default WEP key: idx=%d\n", keyconf->keyidx); memset(&ctx->wep_keys[keyconf->keyidx], 0, sizeof(ctx->wep_keys[0])); if (iwl_is_rfkill(priv)) { IWL_DEBUG_WEP(priv, "Not sending REPLY_WEPKEY command due to RFKILL.\n"); /* but keys in device are clear anyway so return success */ return 0; } ret = iwl_send_static_wepkey_cmd(priv, ctx, 1); IWL_DEBUG_WEP(priv, "Remove default WEP key: idx=%d ret=%d\n", keyconf->keyidx, ret); return ret; } int iwl_set_default_wep_key(struct iwl_priv *priv, struct iwl_rxon_context *ctx, struct ieee80211_key_conf *keyconf) { int ret; lockdep_assert_held(&priv->mutex); if (keyconf->keylen != WEP_KEY_LEN_128 && keyconf->keylen != WEP_KEY_LEN_64) { IWL_DEBUG_WEP(priv, "Bad WEP key length %d\n", keyconf->keylen); return -EINVAL; } keyconf->hw_key_idx = IWLAGN_HW_KEY_DEFAULT; ctx->wep_keys[keyconf->keyidx].key_size = keyconf->keylen; memcpy(&ctx->wep_keys[keyconf->keyidx].key, &keyconf->key, keyconf->keylen); ret = iwl_send_static_wepkey_cmd(priv, ctx, false); IWL_DEBUG_WEP(priv, "Set default WEP key: len=%d idx=%d ret=%d\n", keyconf->keylen, keyconf->keyidx, ret); return ret; } /* * dynamic (per-station) keys * * The dynamic keys are a little more complicated. The device has * a key cache of up to STA_KEY_MAX_NUM/STA_KEY_MAX_NUM_PAN keys. * These are linked to stations by a table that contains an index * into the key table for each station/key index/{mcast,unicast}, * i.e. it's basically an array of pointers like this: * key_offset_t key_mapping[NUM_STATIONS][4][2]; * (it really works differently, but you can think of it as such) * * The key uploading and linking happens in the same command, the * add station command with STA_MODIFY_KEY_MASK. */ static u8 iwlagn_key_sta_id(struct iwl_priv *priv, struct ieee80211_vif *vif, struct ieee80211_sta *sta) { struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv; if (sta) return iwl_sta_id(sta); /* * The device expects GTKs for station interfaces to be * installed as GTKs for the AP station. If we have no * station ID, then use the ap_sta_id in that case. */ if (vif->type == NL80211_IFTYPE_STATION && vif_priv->ctx) return vif_priv->ctx->ap_sta_id; return IWL_INVALID_STATION; } static int iwlagn_send_sta_key(struct iwl_priv *priv, struct ieee80211_key_conf *keyconf, u8 sta_id, u32 tkip_iv32, u16 *tkip_p1k, u32 cmd_flags) { __le16 key_flags; struct iwl_addsta_cmd sta_cmd; int i; spin_lock_bh(&priv->sta_lock); memcpy(&sta_cmd, &priv->stations[sta_id].sta, sizeof(sta_cmd)); spin_unlock_bh(&priv->sta_lock); key_flags = cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS); key_flags |= STA_KEY_FLG_MAP_KEY_MSK; switch (keyconf->cipher) { case WLAN_CIPHER_SUITE_CCMP: key_flags |= STA_KEY_FLG_CCMP; memcpy(sta_cmd.key.key, keyconf->key, keyconf->keylen); break; case WLAN_CIPHER_SUITE_TKIP: key_flags |= STA_KEY_FLG_TKIP; sta_cmd.key.tkip_rx_tsc_byte2 = tkip_iv32; for (i = 0; i < 5; i++) sta_cmd.key.tkip_rx_ttak[i] = cpu_to_le16(tkip_p1k[i]); memcpy(sta_cmd.key.key, keyconf->key, keyconf->keylen); break; case WLAN_CIPHER_SUITE_WEP104: key_flags |= STA_KEY_FLG_KEY_SIZE_MSK; /* fall through */ case WLAN_CIPHER_SUITE_WEP40: key_flags |= STA_KEY_FLG_WEP; memcpy(&sta_cmd.key.key[3], keyconf->key, keyconf->keylen); break; default: WARN_ON(1); return -EINVAL; } if (!(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE)) key_flags |= STA_KEY_MULTICAST_MSK; /* key pointer (offset) */ sta_cmd.key.key_offset = keyconf->hw_key_idx; sta_cmd.key.key_flags = key_flags; sta_cmd.mode = STA_CONTROL_MODIFY_MSK; sta_cmd.sta.modify_mask = STA_MODIFY_KEY_MASK; return iwl_send_add_sta(priv, &sta_cmd, cmd_flags); } void iwl_update_tkip_key(struct iwl_priv *priv, struct ieee80211_vif *vif, struct ieee80211_key_conf *keyconf, struct ieee80211_sta *sta, u32 iv32, u16 *phase1key) { u8 sta_id = iwlagn_key_sta_id(priv, vif, sta); if (sta_id == IWL_INVALID_STATION) return; if (iwl_scan_cancel(priv)) { /* cancel scan failed, just live w/ bad key and rely briefly on SW decryption */ return; } iwlagn_send_sta_key(priv, keyconf, sta_id, iv32, phase1key, CMD_ASYNC); } int iwl_remove_dynamic_key(struct iwl_priv *priv, struct iwl_rxon_context *ctx, struct ieee80211_key_conf *keyconf, struct ieee80211_sta *sta) { struct iwl_addsta_cmd sta_cmd; u8 sta_id = iwlagn_key_sta_id(priv, ctx->vif, sta); __le16 key_flags; /* if station isn't there, neither is the key */ if (sta_id == IWL_INVALID_STATION) return -ENOENT; spin_lock_bh(&priv->sta_lock); memcpy(&sta_cmd, &priv->stations[sta_id].sta, sizeof(sta_cmd)); if (!(priv->stations[sta_id].used & IWL_STA_UCODE_ACTIVE)) sta_id = IWL_INVALID_STATION; spin_unlock_bh(&priv->sta_lock); if (sta_id == IWL_INVALID_STATION) return 0; lockdep_assert_held(&priv->mutex); ctx->key_mapping_keys--; IWL_DEBUG_WEP(priv, "Remove dynamic key: idx=%d sta=%d\n", keyconf->keyidx, sta_id); if (!test_and_clear_bit(keyconf->hw_key_idx, &priv->ucode_key_table)) IWL_ERR(priv, "offset %d not used in uCode key table.\n", keyconf->hw_key_idx); key_flags = cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS); key_flags |= STA_KEY_FLG_MAP_KEY_MSK | STA_KEY_FLG_NO_ENC | STA_KEY_FLG_INVALID; if (!(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE)) key_flags |= STA_KEY_MULTICAST_MSK; sta_cmd.key.key_flags = key_flags; sta_cmd.key.key_offset = keyconf->hw_key_idx; sta_cmd.sta.modify_mask = STA_MODIFY_KEY_MASK; sta_cmd.mode = STA_CONTROL_MODIFY_MSK; return iwl_send_add_sta(priv, &sta_cmd, CMD_SYNC); } int iwl_set_dynamic_key(struct iwl_priv *priv, struct iwl_rxon_context *ctx, struct ieee80211_key_conf *keyconf, struct ieee80211_sta *sta) { struct ieee80211_key_seq seq; u16 p1k[5]; int ret; u8 sta_id = iwlagn_key_sta_id(priv, ctx->vif, sta); const u8 *addr; if (sta_id == IWL_INVALID_STATION) return -EINVAL; lockdep_assert_held(&priv->mutex); keyconf->hw_key_idx = iwl_get_free_ucode_key_offset(priv); if (keyconf->hw_key_idx == WEP_INVALID_OFFSET) return -ENOSPC; ctx->key_mapping_keys++; switch (keyconf->cipher) { case WLAN_CIPHER_SUITE_TKIP: if (sta) addr = sta->addr; else /* station mode case only */ addr = ctx->active.bssid_addr; /* pre-fill phase 1 key into device cache */ ieee80211_get_key_rx_seq(keyconf, 0, &seq); ieee80211_get_tkip_rx_p1k(keyconf, addr, seq.tkip.iv32, p1k); ret = iwlagn_send_sta_key(priv, keyconf, sta_id, seq.tkip.iv32, p1k, CMD_SYNC); break; case WLAN_CIPHER_SUITE_CCMP: case WLAN_CIPHER_SUITE_WEP40: case WLAN_CIPHER_SUITE_WEP104: ret = iwlagn_send_sta_key(priv, keyconf, sta_id, 0, NULL, CMD_SYNC); break; default: IWL_ERR(priv, "Unknown cipher %x\n", keyconf->cipher); ret = -EINVAL; } if (ret) { ctx->key_mapping_keys--; clear_bit(keyconf->hw_key_idx, &priv->ucode_key_table); } IWL_DEBUG_WEP(priv, "Set dynamic key: cipher=%x len=%d idx=%d sta=%pM ret=%d\n", keyconf->cipher, keyconf->keylen, keyconf->keyidx, sta ? sta->addr : NULL, ret); return ret; } /** * iwlagn_alloc_bcast_station - add broadcast station into driver's station table. * * This adds the broadcast station into the driver's station table * and marks it driver active, so that it will be restored to the * device at the next best time. */ int iwlagn_alloc_bcast_station(struct iwl_priv *priv, struct iwl_rxon_context *ctx) { struct iwl_link_quality_cmd *link_cmd; u8 sta_id; spin_lock_bh(&priv->sta_lock); sta_id = iwl_prep_station(priv, ctx, iwl_bcast_addr, false, NULL); if (sta_id == IWL_INVALID_STATION) { IWL_ERR(priv, "Unable to prepare broadcast station\n"); spin_unlock_bh(&priv->sta_lock); return -EINVAL; } priv->stations[sta_id].used |= IWL_STA_DRIVER_ACTIVE; priv->stations[sta_id].used |= IWL_STA_BCAST; spin_unlock_bh(&priv->sta_lock); link_cmd = iwl_sta_alloc_lq(priv, ctx, sta_id); if (!link_cmd) { IWL_ERR(priv, "Unable to initialize rate scaling for bcast station.\n"); return -ENOMEM; } spin_lock_bh(&priv->sta_lock); priv->stations[sta_id].lq = link_cmd; spin_unlock_bh(&priv->sta_lock); return 0; } /** * iwl_update_bcast_station - update broadcast station's LQ command * * Only used by iwlagn. Placed here to have all bcast station management * code together. */ int iwl_update_bcast_station(struct iwl_priv *priv, struct iwl_rxon_context *ctx) { struct iwl_link_quality_cmd *link_cmd; u8 sta_id = ctx->bcast_sta_id; link_cmd = iwl_sta_alloc_lq(priv, ctx, sta_id); if (!link_cmd) { IWL_ERR(priv, "Unable to initialize rate scaling for bcast station.\n"); return -ENOMEM; } spin_lock_bh(&priv->sta_lock); if (priv->stations[sta_id].lq) kfree(priv->stations[sta_id].lq); else IWL_DEBUG_INFO(priv, "Bcast station rate scaling has not been initialized yet.\n"); priv->stations[sta_id].lq = link_cmd; spin_unlock_bh(&priv->sta_lock); return 0; } int iwl_update_bcast_stations(struct iwl_priv *priv) { struct iwl_rxon_context *ctx; int ret = 0; for_each_context(priv, ctx) { ret = iwl_update_bcast_station(priv, ctx); if (ret) break; } return ret; } /** * iwl_sta_tx_modify_enable_tid - Enable Tx for this TID in station table */ int iwl_sta_tx_modify_enable_tid(struct iwl_priv *priv, int sta_id, int tid) { struct iwl_addsta_cmd sta_cmd; lockdep_assert_held(&priv->mutex); /* Remove "disable" flag, to enable Tx for this TID */ spin_lock_bh(&priv->sta_lock); priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_TID_DISABLE_TX; priv->stations[sta_id].sta.tid_disable_tx &= cpu_to_le16(~(1 << tid)); priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK; memcpy(&sta_cmd, &priv->stations[sta_id].sta, sizeof(struct iwl_addsta_cmd)); spin_unlock_bh(&priv->sta_lock); return iwl_send_add_sta(priv, &sta_cmd, CMD_SYNC); } int iwl_sta_rx_agg_start(struct iwl_priv *priv, struct ieee80211_sta *sta, int tid, u16 ssn) { int sta_id; struct iwl_addsta_cmd sta_cmd; lockdep_assert_held(&priv->mutex); sta_id = iwl_sta_id(sta); if (sta_id == IWL_INVALID_STATION) return -ENXIO; spin_lock_bh(&priv->sta_lock); priv->stations[sta_id].sta.station_flags_msk = 0; priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_ADDBA_TID_MSK; priv->stations[sta_id].sta.add_immediate_ba_tid = (u8)tid; priv->stations[sta_id].sta.add_immediate_ba_ssn = cpu_to_le16(ssn); priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK; memcpy(&sta_cmd, &priv->stations[sta_id].sta, sizeof(struct iwl_addsta_cmd)); spin_unlock_bh(&priv->sta_lock); return iwl_send_add_sta(priv, &sta_cmd, CMD_SYNC); } int iwl_sta_rx_agg_stop(struct iwl_priv *priv, struct ieee80211_sta *sta, int tid) { int sta_id; struct iwl_addsta_cmd sta_cmd; lockdep_assert_held(&priv->mutex); sta_id = iwl_sta_id(sta); if (sta_id == IWL_INVALID_STATION) { IWL_ERR(priv, "Invalid station for AGG tid %d\n", tid); return -ENXIO; } spin_lock_bh(&priv->sta_lock); priv->stations[sta_id].sta.station_flags_msk = 0; priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_DELBA_TID_MSK; priv->stations[sta_id].sta.remove_immediate_ba_tid = (u8)tid; priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK; memcpy(&sta_cmd, &priv->stations[sta_id].sta, sizeof(struct iwl_addsta_cmd)); spin_unlock_bh(&priv->sta_lock); return iwl_send_add_sta(priv, &sta_cmd, CMD_SYNC); } void iwl_sta_modify_sleep_tx_count(struct iwl_priv *priv, int sta_id, int cnt) { struct iwl_addsta_cmd cmd = { .mode = STA_CONTROL_MODIFY_MSK, .station_flags = STA_FLG_PWR_SAVE_MSK, .station_flags_msk = STA_FLG_PWR_SAVE_MSK, .sta.sta_id = sta_id, .sta.modify_mask = STA_MODIFY_SLEEP_TX_COUNT_MSK, .sleep_tx_count = cpu_to_le16(cnt), }; iwl_send_add_sta(priv, &cmd, CMD_ASYNC); }