Merge commit 'c039c332f23e794deb6d6f37b9f07ff3b27fb2cf' into md

Pull in pre-requisites for adding raid10 support to dm-raid.

1 files changed, 1485 insertions, 0 deletions

diff --git a/drivers/net/wireless/iwlwifi/dvm/sta.c b/drivers/net/wireless/iwlwifi/dvm/sta.c
new file mode 100644
index 00000000000..b29b798f755
--- /dev/null
+++ b/drivers/net/wireless/iwlwifi/dvm/sta.c
@@ -0,0 +1,1485 @@
+/******************************************************************************
+ *
+ * Copyright(c) 2003 - 2012 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 <linux/etherdevice.h>
+#include <net/mac80211.h>
+#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(&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(&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);
+	struct iwl_addsta_cmd *addsta =
+		(struct iwl_addsta_cmd *) cmd->payload;
+
+	return iwl_process_add_sta_resp(priv, addsta, 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_ht_cap *ht_cap)
+{
+	if (!ctx->ht.enabled || !ctx->ht.is_40mhz)
+		return false;
+
+#ifdef CONFIG_IWLWIFI_DEBUGFS
+	if (priv->disable_ht40)
+		return false;
+#endif
+
+	/*
+	 * Remainder of this function checks ht_cap, but if it's
+	 * NULL then we can do HT40 (special case for RXON)
+	 */
+	if (!ht_cap)
+		return true;
+
+	if (!ht_cap->ht_supported)
+		return false;
+
+	if (!(ht_cap->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40))
+		return false;
+
+	return true;
+}
+
+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;
+	u8 mimo_ps_mode;
+
+	*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;
+
+	mimo_ps_mode = (sta_ht_inf->cap & IEEE80211_HT_CAP_SM_PS) >> 2;
+
+	IWL_DEBUG_INFO(priv, "STA %pM SM PS mode: %s\n",
+			sta->addr,
+			(mimo_ps_mode == WLAN_HT_CAP_SM_PS_STATIC) ?
+			"static" :
+			(mimo_ps_mode == WLAN_HT_CAP_SM_PS_DYNAMIC) ?
+			"dynamic" : "disabled");
+
+	switch (mimo_ps_mode) {
+	case WLAN_HT_CAP_SM_PS_STATIC:
+		*flags |= STA_FLG_MIMO_DIS_MSK;
+		break;
+	case WLAN_HT_CAP_SM_PS_DYNAMIC:
+		*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;
+	}
+
+	*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->ht_cap))
+		*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->eeprom_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->eeprom_data->valid_tx_ant);
+
+	link_cmd->general_params.dual_stream_ant_msk =
+		priv->eeprom_data->valid_tx_ant &
+		~first_antenna(priv->eeprom_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->eeprom_data->valid_tx_ant) == 2) {
+		link_cmd->general_params.dual_stream_ant_msk =
+			priv->eeprom_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;
+	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));
+				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);
+}