| /****************************************************************************** |
| * |
| * Copyright(c) 2003 - 2011 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 <ilw@linux.intel.com> |
| * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 |
| * |
| *****************************************************************************/ |
| |
| #include <net/mac80211.h> |
| #include <linux/etherdevice.h> |
| #include <linux/sched.h> |
| #include <linux/lockdep.h> |
| |
| #include "iwl-dev.h" |
| #include "iwl-core.h" |
| #include "iwl-sta.h" |
| #include "iwl-trans.h" |
| |
| /* priv->sta_lock must be held */ |
| static void iwl_sta_ucode_activate(struct iwl_priv *priv, u8 sta_id) |
| { |
| |
| 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); |
| } |
| } |
| |
| static int iwl_process_add_sta_resp(struct iwl_priv *priv, |
| struct iwl_addsta_cmd *addsta, |
| struct iwl_rx_packet *pkt, |
| bool sync) |
| { |
| u8 sta_id = addsta->sta.sta_id; |
| unsigned long flags; |
| 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_irqsave(&priv->sta_lock, flags); |
| |
| switch (pkt->u.add_sta.status) { |
| case ADD_STA_SUCCESS_MSK: |
| IWL_DEBUG_INFO(priv, "REPLY_ADD_STA PASSED\n"); |
| iwl_sta_ucode_activate(priv, sta_id); |
| ret = 0; |
| 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", |
| pkt->u.add_sta.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_irqrestore(&priv->sta_lock, flags); |
| |
| return ret; |
| } |
| |
| static void iwl_add_sta_callback(struct iwl_priv *priv, |
| struct iwl_device_cmd *cmd, |
| struct iwl_rx_packet *pkt) |
| { |
| struct iwl_addsta_cmd *addsta = |
| (struct iwl_addsta_cmd *)cmd->cmd.payload; |
| |
| iwl_process_add_sta_resp(priv, addsta, pkt, false); |
| |
| } |
| |
| int iwl_send_add_sta(struct iwl_priv *priv, |
| struct iwl_addsta_cmd *sta, u8 flags) |
| { |
| struct iwl_rx_packet *pkt = NULL; |
| int ret = 0; |
| u8 data[sizeof(*sta)]; |
| struct iwl_host_cmd cmd = { |
| .id = REPLY_ADD_STA, |
| .flags = flags, |
| .data = { data, }, |
| }; |
| 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.callback = iwl_add_sta_callback; |
| else { |
| cmd.flags |= CMD_WANT_SKB; |
| might_sleep(); |
| } |
| |
| cmd.len[0] = priv->cfg->ops->utils->build_addsta_hcmd(sta, data); |
| ret = trans_send_cmd(priv, &cmd); |
| |
| if (ret || (flags & CMD_ASYNC)) |
| return ret; |
| |
| if (ret == 0) { |
| pkt = (struct iwl_rx_packet *)cmd.reply_page; |
| ret = iwl_process_add_sta_resp(priv, sta, pkt, true); |
| } |
| iwl_free_pages(priv, cmd.reply_page); |
| |
| return ret; |
| } |
| |
| static void iwl_set_ht_add_station(struct iwl_priv *priv, u8 index, |
| struct ieee80211_sta *sta, |
| struct iwl_rxon_context *ctx) |
| { |
| struct ieee80211_sta_ht_cap *sta_ht_inf = &sta->ht_cap; |
| __le32 sta_flags; |
| u8 mimo_ps_mode; |
| |
| if (!sta || !sta_ht_inf->ht_supported) |
| goto done; |
| |
| mimo_ps_mode = (sta_ht_inf->cap & IEEE80211_HT_CAP_SM_PS) >> 2; |
| IWL_DEBUG_ASSOC(priv, "spatial multiplexing power save mode: %s\n", |
| (mimo_ps_mode == WLAN_HT_CAP_SM_PS_STATIC) ? |
| "static" : |
| (mimo_ps_mode == WLAN_HT_CAP_SM_PS_DYNAMIC) ? |
| "dynamic" : "disabled"); |
| |
| sta_flags = priv->stations[index].sta.station_flags; |
| |
| sta_flags &= ~(STA_FLG_RTS_MIMO_PROT_MSK | STA_FLG_MIMO_DIS_MSK); |
| |
| switch (mimo_ps_mode) { |
| case WLAN_HT_CAP_SM_PS_STATIC: |
| sta_flags |= STA_FLG_MIMO_DIS_MSK; |
| break; |
| case WLAN_HT_CAP_SM_PS_DYNAMIC: |
| sta_flags |= STA_FLG_RTS_MIMO_PROT_MSK; |
| break; |
| case WLAN_HT_CAP_SM_PS_DISABLED: |
| break; |
| default: |
| IWL_WARN(priv, "Invalid MIMO PS mode %d\n", mimo_ps_mode); |
| break; |
| } |
| |
| sta_flags |= cpu_to_le32( |
| (u32)sta_ht_inf->ampdu_factor << STA_FLG_MAX_AGG_SIZE_POS); |
| |
| sta_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->ht_cap)) |
| sta_flags |= STA_FLG_HT40_EN_MSK; |
| else |
| sta_flags &= ~STA_FLG_HT40_EN_MSK; |
| |
| priv->stations[index].sta.station_flags = sta_flags; |
| done: |
| return; |
| } |
| |
| /** |
| * 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 < priv->hw_params.max_stations; i++) { |
| if (!compare_ether_addr(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) && |
| !compare_ether_addr(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_common *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) |
| { |
| unsigned long flags_spin; |
| int ret = 0; |
| u8 sta_id; |
| struct iwl_addsta_cmd sta_cmd; |
| |
| *sta_id_r = 0; |
| spin_lock_irqsave(&priv->sta_lock, flags_spin); |
| 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_irqrestore(&priv->sta_lock, flags_spin); |
| 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_irqrestore(&priv->sta_lock, flags_spin); |
| 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_irqrestore(&priv->sta_lock, flags_spin); |
| 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_irqrestore(&priv->sta_lock, flags_spin); |
| |
| /* Add station to device's station table */ |
| ret = iwl_send_add_sta(priv, &sta_cmd, CMD_SYNC); |
| if (ret) { |
| spin_lock_irqsave(&priv->sta_lock, flags_spin); |
| 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_irqrestore(&priv->sta_lock, flags_spin); |
| } |
| *sta_id_r = sta_id; |
| return ret; |
| } |
| |
| /** |
| * iwl_sta_ucode_deactivate - deactivate ucode status for a station |
| * |
| * priv->sta_lock must be held |
| */ |
| static void iwl_sta_ucode_deactivate(struct iwl_priv *priv, u8 sta_id) |
| { |
| /* 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; |
| |
| unsigned long flags_spin; |
| 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 = trans_send_cmd(priv, &cmd); |
| |
| if (ret) |
| return ret; |
| |
| pkt = (struct iwl_rx_packet *)cmd.reply_page; |
| 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) { |
| switch (pkt->u.rem_sta.status) { |
| case REM_STA_SUCCESS_MSK: |
| if (!temporary) { |
| spin_lock_irqsave(&priv->sta_lock, flags_spin); |
| iwl_sta_ucode_deactivate(priv, sta_id); |
| spin_unlock_irqrestore(&priv->sta_lock, flags_spin); |
| } |
| IWL_DEBUG_ASSOC(priv, "REPLY_REMOVE_STA PASSED\n"); |
| break; |
| default: |
| ret = -EIO; |
| IWL_ERR(priv, "REPLY_REMOVE_STA failed\n"); |
| break; |
| } |
| } |
| iwl_free_pages(priv, cmd.reply_page); |
| |
| 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) |
| { |
| unsigned long flags; |
| |
| 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_irqsave(&priv->sta_lock, flags); |
| |
| 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; |
| } |
| |
| 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_irqrestore(&priv->sta_lock, flags); |
| |
| return iwl_send_remove_station(priv, addr, sta_id, false); |
| out_err: |
| spin_unlock_irqrestore(&priv->sta_lock, flags); |
| return -EINVAL; |
| } |
| |
| /** |
| * 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; |
| unsigned long flags_spin; |
| bool cleared = false; |
| |
| IWL_DEBUG_INFO(priv, "Clearing ucode stations in driver\n"); |
| |
| spin_lock_irqsave(&priv->sta_lock, flags_spin); |
| for (i = 0; i < priv->hw_params.max_stations; 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_irqrestore(&priv->sta_lock, flags_spin); |
| |
| 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; |
| struct iwl_link_quality_cmd lq; |
| unsigned long flags_spin; |
| 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_irqsave(&priv->sta_lock, flags_spin); |
| for (i = 0; i < priv->hw_params.max_stations; 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 < priv->hw_params.max_stations; 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) { |
| memcpy(&lq, priv->stations[i].lq, |
| sizeof(struct iwl_link_quality_cmd)); |
| send_lq = true; |
| } |
| spin_unlock_irqrestore(&priv->sta_lock, flags_spin); |
| ret = iwl_send_add_sta(priv, &sta_cmd, CMD_SYNC); |
| if (ret) { |
| spin_lock_irqsave(&priv->sta_lock, flags_spin); |
| 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; |
| spin_unlock_irqrestore(&priv->sta_lock, flags_spin); |
| } |
| /* |
| * 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_irqsave(&priv->sta_lock, flags_spin); |
| priv->stations[i].used &= ~IWL_STA_UCODE_INPROGRESS; |
| } |
| } |
| |
| spin_unlock_irqrestore(&priv->sta_lock, flags_spin); |
| 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"); |
| } |
| |
| void iwl_reprogram_ap_sta(struct iwl_priv *priv, struct iwl_rxon_context *ctx) |
| { |
| unsigned long flags; |
| int sta_id = ctx->ap_sta_id; |
| int ret; |
| struct iwl_addsta_cmd sta_cmd; |
| struct iwl_link_quality_cmd lq; |
| bool active; |
| |
| spin_lock_irqsave(&priv->sta_lock, flags); |
| if (!(priv->stations[sta_id].used & IWL_STA_DRIVER_ACTIVE)) { |
| spin_unlock_irqrestore(&priv->sta_lock, flags); |
| return; |
| } |
| |
| memcpy(&sta_cmd, &priv->stations[sta_id].sta, sizeof(sta_cmd)); |
| sta_cmd.mode = 0; |
| memcpy(&lq, priv->stations[sta_id].lq, sizeof(lq)); |
| |
| active = priv->stations[sta_id].used & IWL_STA_UCODE_ACTIVE; |
| priv->stations[sta_id].used &= ~IWL_STA_DRIVER_ACTIVE; |
| spin_unlock_irqrestore(&priv->sta_lock, flags); |
| |
| if (active) { |
| ret = iwl_send_remove_station( |
| priv, priv->stations[sta_id].sta.sta.addr, |
| sta_id, true); |
| if (ret) |
| IWL_ERR(priv, "failed to remove STA %pM (%d)\n", |
| priv->stations[sta_id].sta.sta.addr, ret); |
| } |
| spin_lock_irqsave(&priv->sta_lock, flags); |
| priv->stations[sta_id].used |= IWL_STA_DRIVER_ACTIVE; |
| spin_unlock_irqrestore(&priv->sta_lock, flags); |
| |
| ret = iwl_send_add_sta(priv, &sta_cmd, CMD_SYNC); |
| if (ret) |
| IWL_ERR(priv, "failed to re-add STA %pM (%d)\n", |
| priv->stations[sta_id].sta.sta.addr, ret); |
| iwl_send_lq_cmd(priv, ctx, &lq, CMD_SYNC, true); |
| } |
| |
| int iwl_get_free_ucode_key_index(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) |
| { |
| unsigned long flags; |
| int i; |
| |
| spin_lock_irqsave(&priv->sta_lock, flags); |
| for (i = 0; i < priv->hw_params.max_stations; 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_irqrestore(&priv->sta_lock, flags); |
| } |
| |
| #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; |
| unsigned long flags_spin; |
| |
| 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_irqsave(&priv->sta_lock, flags_spin); |
| if (!(priv->stations[lq->sta_id].used & IWL_STA_DRIVER_ACTIVE)) { |
| spin_unlock_irqrestore(&priv->sta_lock, flags_spin); |
| return -EINVAL; |
| } |
| spin_unlock_irqrestore(&priv->sta_lock, flags_spin); |
| |
| 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 = trans_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_irqsave(&priv->sta_lock, flags_spin); |
| priv->stations[lq->sta_id].used &= ~IWL_STA_UCODE_INPROGRESS; |
| spin_unlock_irqrestore(&priv->sta_lock, flags_spin); |
| } |
| return ret; |
| } |
| |
| int iwl_mac_sta_remove(struct ieee80211_hw *hw, |
| struct ieee80211_vif *vif, |
| struct ieee80211_sta *sta) |
| { |
| struct iwl_priv *priv = hw->priv; |
| struct iwl_station_priv_common *sta_common = (void *)sta->drv_priv; |
| int ret; |
| |
| IWL_DEBUG_INFO(priv, "received request to remove station %pM\n", |
| sta->addr); |
| mutex_lock(&priv->mutex); |
| IWL_DEBUG_INFO(priv, "proceeding to remove station %pM\n", |
| sta->addr); |
| ret = iwl_remove_station(priv, sta_common->sta_id, sta->addr); |
| if (ret) |
| IWL_ERR(priv, "Error removing station %pM\n", |
| sta->addr); |
| mutex_unlock(&priv->mutex); |
| return ret; |
| } |