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Emmanuel Grumbach6974e362008-04-14 21:16:06 -07001/******************************************************************************
2 *
Reinette Chatre1f447802010-01-15 13:43:41 -08003 * Copyright(c) 2003 - 2010 Intel Corporation. All rights reserved.
Emmanuel Grumbach6974e362008-04-14 21:16:06 -07004 *
5 * Portions of this file are derived from the ipw3945 project, as well
6 * as portions of the ieee80211 subsystem header files.
7 *
8 * This program is free software; you can redistribute it and/or modify it
9 * under the terms of version 2 of the GNU General Public License as
10 * published by the Free Software Foundation.
11 *
12 * This program is distributed in the hope that it will be useful, but WITHOUT
13 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
14 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
15 * more details.
16 *
17 * You should have received a copy of the GNU General Public License along with
18 * this program; if not, write to the Free Software Foundation, Inc.,
19 * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
20 *
21 * The full GNU General Public License is included in this distribution in the
22 * file called LICENSE.
23 *
24 * Contact Information:
Winkler, Tomas759ef892008-12-09 11:28:58 -080025 * Intel Linux Wireless <ilw@linux.intel.com>
Emmanuel Grumbach6974e362008-04-14 21:16:06 -070026 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
27 *
28 *****************************************************************************/
29
30#include <net/mac80211.h>
Tomas Winkler947b13a2008-04-16 16:34:48 -070031#include <linux/etherdevice.h>
Reinette Chatrefe6b23d2010-02-22 16:24:47 -080032#include <linux/sched.h>
Johannes Berg4620fef2010-06-16 03:30:27 -070033#include <linux/lockdep.h>
Emmanuel Grumbach6974e362008-04-14 21:16:06 -070034
Tomas Winkler3e0d4cb2008-04-24 11:55:38 -070035#include "iwl-dev.h"
Emmanuel Grumbach6974e362008-04-14 21:16:06 -070036#include "iwl-core.h"
37#include "iwl-sta.h"
Tomas Winkler7a999bf2008-05-29 16:35:02 +080038
Reinette Chatre1fa97aa2010-01-22 14:22:48 -080039/* priv->sta_lock must be held */
Emmanuel Grumbach24e5c402008-06-30 17:23:03 +080040static void iwl_sta_ucode_activate(struct iwl_priv *priv, u8 sta_id)
41{
Reinette Chatre1fa97aa2010-01-22 14:22:48 -080042
43 if (!(priv->stations[sta_id].used & IWL_STA_DRIVER_ACTIVE))
44 IWL_ERR(priv, "ACTIVATE a non DRIVER active station id %u addr %pM\n",
45 sta_id, priv->stations[sta_id].sta.sta.addr);
46
47 if (priv->stations[sta_id].used & IWL_STA_UCODE_ACTIVE) {
48 IWL_DEBUG_ASSOC(priv,
49 "STA id %u addr %pM already present in uCode (according to driver)\n",
50 sta_id, priv->stations[sta_id].sta.sta.addr);
51 } else {
52 priv->stations[sta_id].used |= IWL_STA_UCODE_ACTIVE;
53 IWL_DEBUG_ASSOC(priv, "Added STA id %u addr %pM to uCode\n",
54 sta_id, priv->stations[sta_id].sta.sta.addr);
55 }
56}
57
Johannes Berg09034cb2010-06-14 08:32:38 -070058static int iwl_process_add_sta_resp(struct iwl_priv *priv,
59 struct iwl_addsta_cmd *addsta,
60 struct iwl_rx_packet *pkt,
61 bool sync)
Reinette Chatre1fa97aa2010-01-22 14:22:48 -080062{
63 u8 sta_id = addsta->sta.sta_id;
Emmanuel Grumbach24e5c402008-06-30 17:23:03 +080064 unsigned long flags;
Johannes Berg09034cb2010-06-14 08:32:38 -070065 int ret = -EIO;
Emmanuel Grumbach24e5c402008-06-30 17:23:03 +080066
Reinette Chatre1fa97aa2010-01-22 14:22:48 -080067 if (pkt->hdr.flags & IWL_CMD_FAILED_MSK) {
68 IWL_ERR(priv, "Bad return from REPLY_ADD_STA (0x%08X)\n",
69 pkt->hdr.flags);
Johannes Berg09034cb2010-06-14 08:32:38 -070070 return ret;
Reinette Chatre1fa97aa2010-01-22 14:22:48 -080071 }
72
73 IWL_DEBUG_INFO(priv, "Processing response for adding station %u\n",
74 sta_id);
75
Emmanuel Grumbach24e5c402008-06-30 17:23:03 +080076 spin_lock_irqsave(&priv->sta_lock, flags);
77
Reinette Chatre1fa97aa2010-01-22 14:22:48 -080078 switch (pkt->u.add_sta.status) {
79 case ADD_STA_SUCCESS_MSK:
80 IWL_DEBUG_INFO(priv, "REPLY_ADD_STA PASSED\n");
81 iwl_sta_ucode_activate(priv, sta_id);
Johannes Berg09034cb2010-06-14 08:32:38 -070082 ret = 0;
Reinette Chatre1fa97aa2010-01-22 14:22:48 -080083 break;
84 case ADD_STA_NO_ROOM_IN_TABLE:
85 IWL_ERR(priv, "Adding station %d failed, no room in table.\n",
Winkler, Tomas15b16872008-12-19 10:37:33 +080086 sta_id);
Reinette Chatre1fa97aa2010-01-22 14:22:48 -080087 break;
88 case ADD_STA_NO_BLOCK_ACK_RESOURCE:
89 IWL_ERR(priv, "Adding station %d failed, no block ack resource.\n",
90 sta_id);
91 break;
92 case ADD_STA_MODIFY_NON_EXIST_STA:
Frans Pop91dd6c22010-03-24 14:19:58 -070093 IWL_ERR(priv, "Attempting to modify non-existing station %d\n",
Reinette Chatre1fa97aa2010-01-22 14:22:48 -080094 sta_id);
95 break;
96 default:
97 IWL_DEBUG_ASSOC(priv, "Received REPLY_ADD_STA:(0x%08X)\n",
98 pkt->u.add_sta.status);
99 break;
100 }
Emmanuel Grumbach24e5c402008-06-30 17:23:03 +0800101
Reinette Chatre1fa97aa2010-01-22 14:22:48 -0800102 IWL_DEBUG_INFO(priv, "%s station id %u addr %pM\n",
103 priv->stations[sta_id].sta.mode ==
104 STA_CONTROL_MODIFY_MSK ? "Modified" : "Added",
105 sta_id, priv->stations[sta_id].sta.sta.addr);
106
107 /*
108 * XXX: The MAC address in the command buffer is often changed from
109 * the original sent to the device. That is, the MAC address
110 * written to the command buffer often is not the same MAC adress
111 * read from the command buffer when the command returns. This
112 * issue has not yet been resolved and this debugging is left to
113 * observe the problem.
114 */
115 IWL_DEBUG_INFO(priv, "%s station according to cmd buffer %pM\n",
116 priv->stations[sta_id].sta.mode ==
117 STA_CONTROL_MODIFY_MSK ? "Modified" : "Added",
118 addsta->sta.addr);
Emmanuel Grumbach24e5c402008-06-30 17:23:03 +0800119 spin_unlock_irqrestore(&priv->sta_lock, flags);
Johannes Berg09034cb2010-06-14 08:32:38 -0700120
121 return ret;
Emmanuel Grumbach24e5c402008-06-30 17:23:03 +0800122}
123
Johannes Berg5696aea2009-07-24 11:13:06 -0700124static void iwl_add_sta_callback(struct iwl_priv *priv,
125 struct iwl_device_cmd *cmd,
Zhu Yi2f301222009-10-09 17:19:45 +0800126 struct iwl_rx_packet *pkt)
Tomas Winkler42132bc2008-05-29 16:35:03 +0800127{
Tomas Winkler3257e5d2008-10-14 12:32:43 -0700128 struct iwl_addsta_cmd *addsta =
129 (struct iwl_addsta_cmd *)cmd->cmd.payload;
Tomas Winkler42132bc2008-05-29 16:35:03 +0800130
Reinette Chatre1fa97aa2010-01-22 14:22:48 -0800131 iwl_process_add_sta_resp(priv, addsta, pkt, false);
Tomas Winkler42132bc2008-05-29 16:35:03 +0800132
Tomas Winkler42132bc2008-05-29 16:35:03 +0800133}
134
Samuel Ortiz17f841c2009-01-23 13:45:20 -0800135int iwl_send_add_sta(struct iwl_priv *priv,
Tomas Winkler133636d2008-05-05 10:22:34 +0800136 struct iwl_addsta_cmd *sta, u8 flags)
137{
Zhu Yi2f301222009-10-09 17:19:45 +0800138 struct iwl_rx_packet *pkt = NULL;
Tomas Winkler133636d2008-05-05 10:22:34 +0800139 int ret = 0;
140 u8 data[sizeof(*sta)];
141 struct iwl_host_cmd cmd = {
142 .id = REPLY_ADD_STA,
Johannes Bergc2acea82009-07-24 11:13:05 -0700143 .flags = flags,
Tomas Winkler133636d2008-05-05 10:22:34 +0800144 .data = data,
145 };
Reinette Chatref875f512010-04-05 10:43:10 -0700146 u8 sta_id __maybe_unused = sta->sta.sta_id;
Reinette Chatrefe6b23d2010-02-22 16:24:47 -0800147
148 IWL_DEBUG_INFO(priv, "Adding sta %u (%pM) %ssynchronously\n",
149 sta_id, sta->sta.addr, flags & CMD_ASYNC ? "a" : "");
Tomas Winkler133636d2008-05-05 10:22:34 +0800150
Tomas Winkler42132bc2008-05-29 16:35:03 +0800151 if (flags & CMD_ASYNC)
Johannes Bergc2acea82009-07-24 11:13:05 -0700152 cmd.callback = iwl_add_sta_callback;
Johannes Berg4620fef2010-06-16 03:30:27 -0700153 else {
Johannes Bergc2acea82009-07-24 11:13:05 -0700154 cmd.flags |= CMD_WANT_SKB;
Johannes Berg4620fef2010-06-16 03:30:27 -0700155 might_sleep();
156 }
Tomas Winkler133636d2008-05-05 10:22:34 +0800157
158 cmd.len = priv->cfg->ops->utils->build_addsta_hcmd(sta, data);
159 ret = iwl_send_cmd(priv, &cmd);
160
161 if (ret || (flags & CMD_ASYNC))
162 return ret;
163
Tomas Winkler133636d2008-05-05 10:22:34 +0800164 if (ret == 0) {
Reinette Chatre1fa97aa2010-01-22 14:22:48 -0800165 pkt = (struct iwl_rx_packet *)cmd.reply_page;
Johannes Berg09034cb2010-06-14 08:32:38 -0700166 ret = iwl_process_add_sta_resp(priv, sta, pkt, true);
Tomas Winkler133636d2008-05-05 10:22:34 +0800167 }
Zhu Yi64a76b52009-12-10 14:37:21 -0800168 iwl_free_pages(priv, cmd.reply_page);
Tomas Winkler133636d2008-05-05 10:22:34 +0800169
170 return ret;
171}
Samuel Ortiz17f841c2009-01-23 13:45:20 -0800172EXPORT_SYMBOL(iwl_send_add_sta);
Tomas Winkler947b13a2008-04-16 16:34:48 -0700173
Tomas Winkler4f40e4d2008-05-15 13:54:04 +0800174static void iwl_set_ht_add_station(struct iwl_priv *priv, u8 index,
Johannes Berg7e6a5882010-08-23 10:46:46 +0200175 struct ieee80211_sta *sta,
176 struct iwl_rxon_context *ctx)
Tomas Winkler4f40e4d2008-05-15 13:54:04 +0800177{
Johannes Berg238d7812010-08-23 10:46:45 +0200178 struct ieee80211_sta_ht_cap *sta_ht_inf = &sta->ht_cap;
Tomas Winkler4f40e4d2008-05-15 13:54:04 +0800179 __le32 sta_flags;
180 u8 mimo_ps_mode;
181
Johannes Berg238d7812010-08-23 10:46:45 +0200182 if (!sta || !sta_ht_inf->ht_supported)
Tomas Winkler4f40e4d2008-05-15 13:54:04 +0800183 goto done;
184
Tomas Winkler00c5ae22008-09-03 11:26:42 +0800185 mimo_ps_mode = (sta_ht_inf->cap & IEEE80211_HT_CAP_SM_PS) >> 2;
Wey-Yi Guy3f3e0372009-10-30 14:36:17 -0700186 IWL_DEBUG_ASSOC(priv, "spatial multiplexing power save mode: %s\n",
187 (mimo_ps_mode == WLAN_HT_CAP_SM_PS_STATIC) ?
188 "static" :
189 (mimo_ps_mode == WLAN_HT_CAP_SM_PS_DYNAMIC) ?
190 "dynamic" : "disabled");
Tomas Winkler4f40e4d2008-05-15 13:54:04 +0800191
192 sta_flags = priv->stations[index].sta.station_flags;
193
194 sta_flags &= ~(STA_FLG_RTS_MIMO_PROT_MSK | STA_FLG_MIMO_DIS_MSK);
195
196 switch (mimo_ps_mode) {
Tomas Winkler00c5ae22008-09-03 11:26:42 +0800197 case WLAN_HT_CAP_SM_PS_STATIC:
Tomas Winkler4f40e4d2008-05-15 13:54:04 +0800198 sta_flags |= STA_FLG_MIMO_DIS_MSK;
199 break;
Tomas Winkler00c5ae22008-09-03 11:26:42 +0800200 case WLAN_HT_CAP_SM_PS_DYNAMIC:
Tomas Winkler4f40e4d2008-05-15 13:54:04 +0800201 sta_flags |= STA_FLG_RTS_MIMO_PROT_MSK;
202 break;
Tomas Winkler00c5ae22008-09-03 11:26:42 +0800203 case WLAN_HT_CAP_SM_PS_DISABLED:
Tomas Winkler4f40e4d2008-05-15 13:54:04 +0800204 break;
205 default:
Winkler, Tomas39aadf82008-12-19 10:37:32 +0800206 IWL_WARN(priv, "Invalid MIMO PS mode %d\n", mimo_ps_mode);
Tomas Winkler4f40e4d2008-05-15 13:54:04 +0800207 break;
208 }
209
210 sta_flags |= cpu_to_le32(
211 (u32)sta_ht_inf->ampdu_factor << STA_FLG_MAX_AGG_SIZE_POS);
212
213 sta_flags |= cpu_to_le32(
214 (u32)sta_ht_inf->ampdu_density << STA_FLG_AGG_MPDU_DENSITY_POS);
215
Johannes Berg7e6a5882010-08-23 10:46:46 +0200216 if (iwl_is_ht40_tx_allowed(priv, ctx, &sta->ht_cap))
Wey-Yi Guy7aafef12009-08-07 15:41:38 -0700217 sta_flags |= STA_FLG_HT40_EN_MSK;
Tomas Winkler4f40e4d2008-05-15 13:54:04 +0800218 else
Wey-Yi Guy7aafef12009-08-07 15:41:38 -0700219 sta_flags &= ~STA_FLG_HT40_EN_MSK;
Tomas Winkler4f40e4d2008-05-15 13:54:04 +0800220
221 priv->stations[index].sta.station_flags = sta_flags;
222 done:
223 return;
224}
Tomas Winkler4f40e4d2008-05-15 13:54:04 +0800225
226/**
Reinette Chatrefe6b23d2010-02-22 16:24:47 -0800227 * iwl_prep_station - Prepare station information for addition
228 *
229 * should be called with sta_lock held
Tomas Winkler4f40e4d2008-05-15 13:54:04 +0800230 */
Johannes Berga30e3112010-09-22 18:02:01 +0200231u8 iwl_prep_station(struct iwl_priv *priv, struct iwl_rxon_context *ctx,
232 const u8 *addr, bool is_ap, struct ieee80211_sta *sta)
Tomas Winkler4f40e4d2008-05-15 13:54:04 +0800233{
Tomas Winkler4f40e4d2008-05-15 13:54:04 +0800234 struct iwl_station_entry *station;
Tomas Winklerc587de02009-06-03 11:44:07 -0700235 int i;
Reinette Chatrefe6b23d2010-02-22 16:24:47 -0800236 u8 sta_id = IWL_INVALID_STATION;
Tomas Winklerc587de02009-06-03 11:44:07 -0700237 u16 rate;
Tomas Winkler4f40e4d2008-05-15 13:54:04 +0800238
Tomas Winkler4f40e4d2008-05-15 13:54:04 +0800239 if (is_ap)
Johannes Berg2995baf2010-08-23 10:46:42 +0200240 sta_id = ctx->ap_sta_id;
Tomas Winkler4f40e4d2008-05-15 13:54:04 +0800241 else if (is_broadcast_ether_addr(addr))
Johannes Berga194e322010-08-27 08:53:46 -0700242 sta_id = ctx->bcast_sta_id;
Tomas Winkler4f40e4d2008-05-15 13:54:04 +0800243 else
244 for (i = IWL_STA_ID; i < priv->hw_params.max_stations; i++) {
245 if (!compare_ether_addr(priv->stations[i].sta.sta.addr,
246 addr)) {
Emmanuel Grumbach24e5c402008-06-30 17:23:03 +0800247 sta_id = i;
Tomas Winkler4f40e4d2008-05-15 13:54:04 +0800248 break;
249 }
250
251 if (!priv->stations[i].used &&
Emmanuel Grumbach24e5c402008-06-30 17:23:03 +0800252 sta_id == IWL_INVALID_STATION)
253 sta_id = i;
Tomas Winkler4f40e4d2008-05-15 13:54:04 +0800254 }
255
Reinette Chatrefe6b23d2010-02-22 16:24:47 -0800256 /*
257 * These two conditions have the same outcome, but keep them
258 * separate
259 */
260 if (unlikely(sta_id == IWL_INVALID_STATION))
261 return sta_id;
262
263 /*
264 * uCode is not able to deal with multiple requests to add a
265 * station. Keep track if one is in progress so that we do not send
266 * another.
267 */
268 if (priv->stations[sta_id].used & IWL_STA_UCODE_INPROGRESS) {
269 IWL_DEBUG_INFO(priv, "STA %d already in process of being added.\n",
270 sta_id);
Emmanuel Grumbach24e5c402008-06-30 17:23:03 +0800271 return sta_id;
Tomas Winkler4f40e4d2008-05-15 13:54:04 +0800272 }
273
Reinette Chatrefe6b23d2010-02-22 16:24:47 -0800274 if ((priv->stations[sta_id].used & IWL_STA_DRIVER_ACTIVE) &&
275 (priv->stations[sta_id].used & IWL_STA_UCODE_ACTIVE) &&
Emmanuel Grumbach24e5c402008-06-30 17:23:03 +0800276 !compare_ether_addr(priv->stations[sta_id].sta.sta.addr, addr)) {
Reinette Chatrefe6b23d2010-02-22 16:24:47 -0800277 IWL_DEBUG_ASSOC(priv, "STA %d (%pM) already added, not adding again.\n",
278 sta_id, addr);
Emmanuel Grumbach24e5c402008-06-30 17:23:03 +0800279 return sta_id;
Tomas Winkler4f40e4d2008-05-15 13:54:04 +0800280 }
281
Emmanuel Grumbach24e5c402008-06-30 17:23:03 +0800282 station = &priv->stations[sta_id];
283 station->used = IWL_STA_DRIVER_ACTIVE;
Tomas Winklere1623442009-01-27 14:27:56 -0800284 IWL_DEBUG_ASSOC(priv, "Add STA to driver ID %d: %pM\n",
Johannes Berge1749612008-10-27 15:59:26 -0700285 sta_id, addr);
Tomas Winkler4f40e4d2008-05-15 13:54:04 +0800286 priv->num_stations++;
287
288 /* Set up the REPLY_ADD_STA command to send to device */
289 memset(&station->sta, 0, sizeof(struct iwl_addsta_cmd));
290 memcpy(station->sta.sta.addr, addr, ETH_ALEN);
291 station->sta.mode = 0;
Emmanuel Grumbach24e5c402008-06-30 17:23:03 +0800292 station->sta.sta.sta_id = sta_id;
Johannes Berg770e13b2010-08-23 10:46:44 +0200293 station->sta.station_flags = ctx->station_flags;
Johannes Bergdcef7322010-08-27 08:55:52 -0700294 station->ctxid = ctx->ctxid;
Tomas Winkler4f40e4d2008-05-15 13:54:04 +0800295
Johannes Berg238d7812010-08-23 10:46:45 +0200296 if (sta) {
297 struct iwl_station_priv_common *sta_priv;
298
299 sta_priv = (void *)sta->drv_priv;
300 sta_priv->ctx = ctx;
301 }
302
Johannes Berg63d41762010-04-30 11:30:50 -0700303 /*
304 * OK to call unconditionally, since local stations (IBSS BSSID
Johannes Berg238d7812010-08-23 10:46:45 +0200305 * STA and broadcast STA) pass in a NULL sta, and mac80211
Johannes Berg63d41762010-04-30 11:30:50 -0700306 * doesn't allow HT IBSS.
307 */
Johannes Berg7e6a5882010-08-23 10:46:46 +0200308 iwl_set_ht_add_station(priv, sta_id, sta, ctx);
Tomas Winkler4f40e4d2008-05-15 13:54:04 +0800309
Tomas Winklerc587de02009-06-03 11:44:07 -0700310 /* 3945 only */
311 rate = (priv->band == IEEE80211_BAND_5GHZ) ?
312 IWL_RATE_6M_PLCP : IWL_RATE_1M_PLCP;
313 /* Turn on both antennas for the station... */
314 station->sta.rate_n_flags = cpu_to_le16(rate | RATE_MCS_ANT_AB_MSK);
315
Emmanuel Grumbach24e5c402008-06-30 17:23:03 +0800316 return sta_id;
Tomas Winkler4f40e4d2008-05-15 13:54:04 +0800317
318}
Johannes Berga30e3112010-09-22 18:02:01 +0200319EXPORT_SYMBOL_GPL(iwl_prep_station);
Tomas Winkler4f40e4d2008-05-15 13:54:04 +0800320
Reinette Chatrefe6b23d2010-02-22 16:24:47 -0800321#define STA_WAIT_TIMEOUT (HZ/2)
322
323/**
324 * iwl_add_station_common -
325 */
Johannes Berga194e322010-08-27 08:53:46 -0700326int iwl_add_station_common(struct iwl_priv *priv, struct iwl_rxon_context *ctx,
327 const u8 *addr, bool is_ap,
Johannes Berg238d7812010-08-23 10:46:45 +0200328 struct ieee80211_sta *sta, u8 *sta_id_r)
Tomas Winkler7a999bf2008-05-29 16:35:02 +0800329{
Reinette Chatrefe6b23d2010-02-22 16:24:47 -0800330 unsigned long flags_spin;
331 int ret = 0;
332 u8 sta_id;
Reinette Chatre9c5ac092010-05-05 02:26:06 -0700333 struct iwl_addsta_cmd sta_cmd;
Emmanuel Grumbach24e5c402008-06-30 17:23:03 +0800334
Reinette Chatrefe6b23d2010-02-22 16:24:47 -0800335 *sta_id_r = 0;
336 spin_lock_irqsave(&priv->sta_lock, flags_spin);
Johannes Berg238d7812010-08-23 10:46:45 +0200337 sta_id = iwl_prep_station(priv, ctx, addr, is_ap, sta);
Reinette Chatrefe6b23d2010-02-22 16:24:47 -0800338 if (sta_id == IWL_INVALID_STATION) {
339 IWL_ERR(priv, "Unable to prepare station %pM for addition\n",
340 addr);
341 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
342 return -EINVAL;
343 }
Emmanuel Grumbach24e5c402008-06-30 17:23:03 +0800344
Reinette Chatrefe6b23d2010-02-22 16:24:47 -0800345 /*
346 * uCode is not able to deal with multiple requests to add a
347 * station. Keep track if one is in progress so that we do not send
348 * another.
349 */
350 if (priv->stations[sta_id].used & IWL_STA_UCODE_INPROGRESS) {
351 IWL_DEBUG_INFO(priv, "STA %d already in process of being added.\n",
352 sta_id);
353 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
354 return -EEXIST;
355 }
Emmanuel Grumbach24e5c402008-06-30 17:23:03 +0800356
Reinette Chatrefe6b23d2010-02-22 16:24:47 -0800357 if ((priv->stations[sta_id].used & IWL_STA_DRIVER_ACTIVE) &&
358 (priv->stations[sta_id].used & IWL_STA_UCODE_ACTIVE)) {
359 IWL_DEBUG_ASSOC(priv, "STA %d (%pM) already added, not adding again.\n",
360 sta_id, addr);
361 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
362 return -EEXIST;
363 }
Emmanuel Grumbach24e5c402008-06-30 17:23:03 +0800364
Reinette Chatrefe6b23d2010-02-22 16:24:47 -0800365 priv->stations[sta_id].used |= IWL_STA_UCODE_INPROGRESS;
Reinette Chatre9c5ac092010-05-05 02:26:06 -0700366 memcpy(&sta_cmd, &priv->stations[sta_id].sta, sizeof(struct iwl_addsta_cmd));
Reinette Chatrefe6b23d2010-02-22 16:24:47 -0800367 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
368
369 /* Add station to device's station table */
Reinette Chatre9c5ac092010-05-05 02:26:06 -0700370 ret = iwl_send_add_sta(priv, &sta_cmd, CMD_SYNC);
Reinette Chatrefe6b23d2010-02-22 16:24:47 -0800371 if (ret) {
Reinette Chatrefe6b23d2010-02-22 16:24:47 -0800372 spin_lock_irqsave(&priv->sta_lock, flags_spin);
Reinette Chatre9c5ac092010-05-05 02:26:06 -0700373 IWL_ERR(priv, "Adding station %pM failed.\n",
374 priv->stations[sta_id].sta.sta.addr);
Reinette Chatrefe6b23d2010-02-22 16:24:47 -0800375 priv->stations[sta_id].used &= ~IWL_STA_DRIVER_ACTIVE;
376 priv->stations[sta_id].used &= ~IWL_STA_UCODE_INPROGRESS;
377 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
378 }
379 *sta_id_r = sta_id;
380 return ret;
381}
382EXPORT_SYMBOL(iwl_add_station_common);
383
Reinette Chatrefe6b23d2010-02-22 16:24:47 -0800384/**
385 * iwl_sta_ucode_deactivate - deactivate ucode status for a station
386 *
387 * priv->sta_lock must be held
388 */
389static void iwl_sta_ucode_deactivate(struct iwl_priv *priv, u8 sta_id)
390{
Emmanuel Grumbach24e5c402008-06-30 17:23:03 +0800391 /* Ucode must be active and driver must be non active */
Reinette Chatred2e210a2010-04-23 10:33:33 -0700392 if ((priv->stations[sta_id].used &
393 (IWL_STA_UCODE_ACTIVE | IWL_STA_DRIVER_ACTIVE)) != IWL_STA_UCODE_ACTIVE)
Reinette Chatrefe6b23d2010-02-22 16:24:47 -0800394 IWL_ERR(priv, "removed non active STA %u\n", sta_id);
Emmanuel Grumbach24e5c402008-06-30 17:23:03 +0800395
396 priv->stations[sta_id].used &= ~IWL_STA_UCODE_ACTIVE;
397
398 memset(&priv->stations[sta_id], 0, sizeof(struct iwl_station_entry));
Reinette Chatrefe6b23d2010-02-22 16:24:47 -0800399 IWL_DEBUG_ASSOC(priv, "Removed STA %u\n", sta_id);
Tomas Winkler7a999bf2008-05-29 16:35:02 +0800400}
401
Reinette Chatrefe6b23d2010-02-22 16:24:47 -0800402static int iwl_send_remove_station(struct iwl_priv *priv,
Reinette Chatre9c5ac092010-05-05 02:26:06 -0700403 const u8 *addr, int sta_id)
Tomas Winkler7a999bf2008-05-29 16:35:02 +0800404{
Zhu Yi2f301222009-10-09 17:19:45 +0800405 struct iwl_rx_packet *pkt;
Tomas Winkler7a999bf2008-05-29 16:35:02 +0800406 int ret;
407
Reinette Chatrefe6b23d2010-02-22 16:24:47 -0800408 unsigned long flags_spin;
Tomas Winkler7a999bf2008-05-29 16:35:02 +0800409 struct iwl_rem_sta_cmd rm_sta_cmd;
410
411 struct iwl_host_cmd cmd = {
412 .id = REPLY_REMOVE_STA,
413 .len = sizeof(struct iwl_rem_sta_cmd),
Reinette Chatrefe6b23d2010-02-22 16:24:47 -0800414 .flags = CMD_SYNC,
Tomas Winkler7a999bf2008-05-29 16:35:02 +0800415 .data = &rm_sta_cmd,
416 };
417
418 memset(&rm_sta_cmd, 0, sizeof(rm_sta_cmd));
419 rm_sta_cmd.num_sta = 1;
Reinette Chatre9c5ac092010-05-05 02:26:06 -0700420 memcpy(&rm_sta_cmd.addr, addr, ETH_ALEN);
Tomas Winkler7a999bf2008-05-29 16:35:02 +0800421
Reinette Chatrefe6b23d2010-02-22 16:24:47 -0800422 cmd.flags |= CMD_WANT_SKB;
423
Tomas Winkler7a999bf2008-05-29 16:35:02 +0800424 ret = iwl_send_cmd(priv, &cmd);
425
Reinette Chatrefe6b23d2010-02-22 16:24:47 -0800426 if (ret)
Tomas Winkler7a999bf2008-05-29 16:35:02 +0800427 return ret;
428
Zhu Yi2f301222009-10-09 17:19:45 +0800429 pkt = (struct iwl_rx_packet *)cmd.reply_page;
430 if (pkt->hdr.flags & IWL_CMD_FAILED_MSK) {
Winkler, Tomas15b16872008-12-19 10:37:33 +0800431 IWL_ERR(priv, "Bad return from REPLY_REMOVE_STA (0x%08X)\n",
Zhu Yi2f301222009-10-09 17:19:45 +0800432 pkt->hdr.flags);
Tomas Winkler7a999bf2008-05-29 16:35:02 +0800433 ret = -EIO;
434 }
435
436 if (!ret) {
Zhu Yi2f301222009-10-09 17:19:45 +0800437 switch (pkt->u.rem_sta.status) {
Tomas Winkler7a999bf2008-05-29 16:35:02 +0800438 case REM_STA_SUCCESS_MSK:
Reinette Chatrefe6b23d2010-02-22 16:24:47 -0800439 spin_lock_irqsave(&priv->sta_lock, flags_spin);
Reinette Chatre9c5ac092010-05-05 02:26:06 -0700440 iwl_sta_ucode_deactivate(priv, sta_id);
Reinette Chatrefe6b23d2010-02-22 16:24:47 -0800441 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
Tomas Winklere1623442009-01-27 14:27:56 -0800442 IWL_DEBUG_ASSOC(priv, "REPLY_REMOVE_STA PASSED\n");
Tomas Winkler7a999bf2008-05-29 16:35:02 +0800443 break;
444 default:
445 ret = -EIO;
Winkler, Tomas15b16872008-12-19 10:37:33 +0800446 IWL_ERR(priv, "REPLY_REMOVE_STA failed\n");
Tomas Winkler7a999bf2008-05-29 16:35:02 +0800447 break;
448 }
449 }
Zhu Yi64a76b52009-12-10 14:37:21 -0800450 iwl_free_pages(priv, cmd.reply_page);
Tomas Winkler7a999bf2008-05-29 16:35:02 +0800451
452 return ret;
453}
Emmanuel Grumbachbe1f3ab62008-06-12 09:47:18 +0800454
Tomas Winkler7a999bf2008-05-29 16:35:02 +0800455/**
456 * iwl_remove_station - Remove driver's knowledge of station.
Tomas Winkler7a999bf2008-05-29 16:35:02 +0800457 */
Johannes Bergfd1af152010-04-30 11:30:43 -0700458int iwl_remove_station(struct iwl_priv *priv, const u8 sta_id,
459 const u8 *addr)
Tomas Winkler7a999bf2008-05-29 16:35:02 +0800460{
Johannes Bergfd1af152010-04-30 11:30:43 -0700461 unsigned long flags;
Reinette Chatrefe6b23d2010-02-22 16:24:47 -0800462
463 if (!iwl_is_ready(priv)) {
464 IWL_DEBUG_INFO(priv,
Frans Pop91dd6c22010-03-24 14:19:58 -0700465 "Unable to remove station %pM, device not ready.\n",
Johannes Bergc0222df2010-04-28 08:44:51 -0700466 addr);
Reinette Chatrefe6b23d2010-02-22 16:24:47 -0800467 /*
468 * It is typical for stations to be removed when we are
469 * going down. Return success since device will be down
470 * soon anyway
471 */
472 return 0;
473 }
Tomas Winkler7a999bf2008-05-29 16:35:02 +0800474
Tomas Winklere1623442009-01-27 14:27:56 -0800475 IWL_DEBUG_ASSOC(priv, "Removing STA from driver:%d %pM\n",
Johannes Bergfd1af152010-04-30 11:30:43 -0700476 sta_id, addr);
477
478 if (WARN_ON(sta_id == IWL_INVALID_STATION))
479 return -EINVAL;
480
481 spin_lock_irqsave(&priv->sta_lock, flags);
Emmanuel Grumbach24e5c402008-06-30 17:23:03 +0800482
483 if (!(priv->stations[sta_id].used & IWL_STA_DRIVER_ACTIVE)) {
Reinette Chatrefe6b23d2010-02-22 16:24:47 -0800484 IWL_DEBUG_INFO(priv, "Removing %pM but non DRIVER active\n",
Johannes Bergc0222df2010-04-28 08:44:51 -0700485 addr);
Johannes Bergfd1af152010-04-30 11:30:43 -0700486 goto out_err;
Tomas Winkler7a999bf2008-05-29 16:35:02 +0800487 }
488
Emmanuel Grumbach24e5c402008-06-30 17:23:03 +0800489 if (!(priv->stations[sta_id].used & IWL_STA_UCODE_ACTIVE)) {
Reinette Chatrefe6b23d2010-02-22 16:24:47 -0800490 IWL_DEBUG_INFO(priv, "Removing %pM but non UCODE active\n",
Johannes Bergc0222df2010-04-28 08:44:51 -0700491 addr);
Johannes Bergfd1af152010-04-30 11:30:43 -0700492 goto out_err;
Emmanuel Grumbach24e5c402008-06-30 17:23:03 +0800493 }
494
Johannes Berg1fa61b22010-04-28 08:44:52 -0700495 if (priv->stations[sta_id].used & IWL_STA_LOCAL) {
496 kfree(priv->stations[sta_id].lq);
497 priv->stations[sta_id].lq = NULL;
498 }
Emmanuel Grumbach24e5c402008-06-30 17:23:03 +0800499
500 priv->stations[sta_id].used &= ~IWL_STA_DRIVER_ACTIVE;
501
502 priv->num_stations--;
503
Tomas Winkler7a999bf2008-05-29 16:35:02 +0800504 BUG_ON(priv->num_stations < 0);
Emmanuel Grumbach24e5c402008-06-30 17:23:03 +0800505
Tomas Winkler7a999bf2008-05-29 16:35:02 +0800506 spin_unlock_irqrestore(&priv->sta_lock, flags);
Emmanuel Grumbach24e5c402008-06-30 17:23:03 +0800507
Reinette Chatre9c5ac092010-05-05 02:26:06 -0700508 return iwl_send_remove_station(priv, addr, sta_id);
Johannes Bergfd1af152010-04-30 11:30:43 -0700509out_err:
Tomas Winkler7a999bf2008-05-29 16:35:02 +0800510 spin_unlock_irqrestore(&priv->sta_lock, flags);
Johannes Bergfd1af152010-04-30 11:30:43 -0700511 return -EINVAL;
Tomas Winkler7a999bf2008-05-29 16:35:02 +0800512}
Johannes Berg1fa61b22010-04-28 08:44:52 -0700513EXPORT_SYMBOL_GPL(iwl_remove_station);
Emmanuel Grumbach24e5c402008-06-30 17:23:03 +0800514
Winkler, Tomas83dde8c2008-11-19 15:32:23 -0800515/**
Johannes Berg2c810cc2010-04-29 00:53:29 -0700516 * iwl_clear_ucode_stations - clear ucode station table bits
517 *
518 * This function clears all the bits in the driver indicating
519 * which stations are active in the ucode. Call when something
520 * other than explicit station management would cause this in
521 * the ucode, e.g. unassociated RXON.
Winkler, Tomas83dde8c2008-11-19 15:32:23 -0800522 */
Johannes Bergdcef7322010-08-27 08:55:52 -0700523void iwl_clear_ucode_stations(struct iwl_priv *priv,
524 struct iwl_rxon_context *ctx)
Winkler, Tomas83dde8c2008-11-19 15:32:23 -0800525{
Mohamed Abbas48676eb2009-03-11 11:17:59 -0700526 int i;
Reinette Chatre7e246192010-02-18 22:58:32 -0800527 unsigned long flags_spin;
528 bool cleared = false;
Winkler, Tomas83dde8c2008-11-19 15:32:23 -0800529
Johannes Berg2c810cc2010-04-29 00:53:29 -0700530 IWL_DEBUG_INFO(priv, "Clearing ucode stations in driver\n");
Mohamed Abbas48676eb2009-03-11 11:17:59 -0700531
Reinette Chatre7e246192010-02-18 22:58:32 -0800532 spin_lock_irqsave(&priv->sta_lock, flags_spin);
Johannes Berg2c810cc2010-04-29 00:53:29 -0700533 for (i = 0; i < priv->hw_params.max_stations; i++) {
Johannes Bergdcef7322010-08-27 08:55:52 -0700534 if (ctx && ctx->ctxid != priv->stations[i].ctxid)
535 continue;
536
Johannes Berg2c810cc2010-04-29 00:53:29 -0700537 if (priv->stations[i].used & IWL_STA_UCODE_ACTIVE) {
538 IWL_DEBUG_INFO(priv, "Clearing ucode active for station %d\n", i);
539 priv->stations[i].used &= ~IWL_STA_UCODE_ACTIVE;
540 cleared = true;
Reinette Chatre7e246192010-02-18 22:58:32 -0800541 }
542 }
543 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
544
545 if (!cleared)
546 IWL_DEBUG_INFO(priv, "No active stations found to be cleared\n");
Winkler, Tomas83dde8c2008-11-19 15:32:23 -0800547}
Reinette Chatre7e246192010-02-18 22:58:32 -0800548EXPORT_SYMBOL(iwl_clear_ucode_stations);
549
550/**
551 * iwl_restore_stations() - Restore driver known stations to device
552 *
553 * All stations considered active by driver, but not present in ucode, is
554 * restored.
Reinette Chatrefe6b23d2010-02-22 16:24:47 -0800555 *
556 * Function sleeps.
Reinette Chatre7e246192010-02-18 22:58:32 -0800557 */
Johannes Bergdcef7322010-08-27 08:55:52 -0700558void iwl_restore_stations(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
Reinette Chatre7e246192010-02-18 22:58:32 -0800559{
Reinette Chatre9c5ac092010-05-05 02:26:06 -0700560 struct iwl_addsta_cmd sta_cmd;
561 struct iwl_link_quality_cmd lq;
Reinette Chatre7e246192010-02-18 22:58:32 -0800562 unsigned long flags_spin;
563 int i;
564 bool found = false;
Reinette Chatrefe6b23d2010-02-22 16:24:47 -0800565 int ret;
Reinette Chatre9c5ac092010-05-05 02:26:06 -0700566 bool send_lq;
Reinette Chatre7e246192010-02-18 22:58:32 -0800567
568 if (!iwl_is_ready(priv)) {
569 IWL_DEBUG_INFO(priv, "Not ready yet, not restoring any stations.\n");
570 return;
571 }
572
573 IWL_DEBUG_ASSOC(priv, "Restoring all known stations ... start.\n");
574 spin_lock_irqsave(&priv->sta_lock, flags_spin);
575 for (i = 0; i < priv->hw_params.max_stations; i++) {
Johannes Bergdcef7322010-08-27 08:55:52 -0700576 if (ctx->ctxid != priv->stations[i].ctxid)
577 continue;
Reinette Chatre7e246192010-02-18 22:58:32 -0800578 if ((priv->stations[i].used & IWL_STA_DRIVER_ACTIVE) &&
579 !(priv->stations[i].used & IWL_STA_UCODE_ACTIVE)) {
580 IWL_DEBUG_ASSOC(priv, "Restoring sta %pM\n",
581 priv->stations[i].sta.sta.addr);
582 priv->stations[i].sta.mode = 0;
583 priv->stations[i].used |= IWL_STA_UCODE_INPROGRESS;
584 found = true;
585 }
586 }
587
588 for (i = 0; i < priv->hw_params.max_stations; i++) {
589 if ((priv->stations[i].used & IWL_STA_UCODE_INPROGRESS)) {
Reinette Chatre9c5ac092010-05-05 02:26:06 -0700590 memcpy(&sta_cmd, &priv->stations[i].sta,
591 sizeof(struct iwl_addsta_cmd));
592 send_lq = false;
593 if (priv->stations[i].lq) {
594 memcpy(&lq, priv->stations[i].lq,
595 sizeof(struct iwl_link_quality_cmd));
596 send_lq = true;
597 }
Reinette Chatrefe6b23d2010-02-22 16:24:47 -0800598 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
Reinette Chatre9c5ac092010-05-05 02:26:06 -0700599 ret = iwl_send_add_sta(priv, &sta_cmd, CMD_SYNC);
Reinette Chatrefe6b23d2010-02-22 16:24:47 -0800600 if (ret) {
Reinette Chatrefe6b23d2010-02-22 16:24:47 -0800601 spin_lock_irqsave(&priv->sta_lock, flags_spin);
Reinette Chatre9c5ac092010-05-05 02:26:06 -0700602 IWL_ERR(priv, "Adding station %pM failed.\n",
603 priv->stations[i].sta.sta.addr);
Reinette Chatrefe6b23d2010-02-22 16:24:47 -0800604 priv->stations[i].used &= ~IWL_STA_DRIVER_ACTIVE;
605 priv->stations[i].used &= ~IWL_STA_UCODE_INPROGRESS;
606 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
607 }
608 /*
609 * Rate scaling has already been initialized, send
610 * current LQ command
611 */
Reinette Chatre9c5ac092010-05-05 02:26:06 -0700612 if (send_lq)
Johannes Berg7e6a5882010-08-23 10:46:46 +0200613 iwl_send_lq_cmd(priv, ctx, &lq, CMD_SYNC, true);
Reinette Chatrefe6b23d2010-02-22 16:24:47 -0800614 spin_lock_irqsave(&priv->sta_lock, flags_spin);
Reinette Chatre7e246192010-02-18 22:58:32 -0800615 priv->stations[i].used &= ~IWL_STA_UCODE_INPROGRESS;
616 }
617 }
618
619 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
620 if (!found)
621 IWL_DEBUG_INFO(priv, "Restoring all known stations .... no stations to be restored.\n");
622 else
Reinette Chatrefe6b23d2010-02-22 16:24:47 -0800623 IWL_DEBUG_INFO(priv, "Restoring all known stations .... complete.\n");
Reinette Chatre7e246192010-02-18 22:58:32 -0800624}
625EXPORT_SYMBOL(iwl_restore_stations);
Winkler, Tomas83dde8c2008-11-19 15:32:23 -0800626
Abhijeet Kolekar6e21f152009-02-27 16:21:21 -0800627int iwl_get_free_ucode_key_index(struct iwl_priv *priv)
Emmanuel Grumbach80fb47a2008-04-14 21:16:08 -0700628{
629 int i;
630
Johannes Bergc10afb62010-08-23 10:46:43 +0200631 for (i = 0; i < priv->sta_key_max_num; i++)
Emmanuel Grumbach77bab602008-04-15 16:01:44 -0700632 if (!test_and_set_bit(i, &priv->ucode_key_table))
Emmanuel Grumbach80fb47a2008-04-14 21:16:08 -0700633 return i;
634
Tomas Winkler40a9a822008-11-25 23:29:03 +0200635 return WEP_INVALID_OFFSET;
Emmanuel Grumbach80fb47a2008-04-14 21:16:08 -0700636}
Abhijeet Kolekar6e21f152009-02-27 16:21:21 -0800637EXPORT_SYMBOL(iwl_get_free_ucode_key_index);
Emmanuel Grumbach6974e362008-04-14 21:16:06 -0700638
Johannes Berga30e3112010-09-22 18:02:01 +0200639void iwl_dealloc_bcast_stations(struct iwl_priv *priv)
Emmanuel Grumbach6974e362008-04-14 21:16:06 -0700640{
Tomas Winkler9f586712008-11-12 13:14:05 -0800641 unsigned long flags;
Tomas Winkler9f586712008-11-12 13:14:05 -0800642 int i;
Tomas Winkler9f586712008-11-12 13:14:05 -0800643
Tomas Winkler9f586712008-11-12 13:14:05 -0800644 spin_lock_irqsave(&priv->sta_lock, flags);
Johannes Berga30e3112010-09-22 18:02:01 +0200645 for (i = 0; i < priv->hw_params.max_stations; i++) {
646 if (!(priv->stations[i].used & IWL_STA_BCAST))
647 continue;
Tomas Winkler9f586712008-11-12 13:14:05 -0800648
Johannes Berga30e3112010-09-22 18:02:01 +0200649 priv->stations[i].used &= ~IWL_STA_UCODE_ACTIVE;
650 priv->num_stations--;
651 BUG_ON(priv->num_stations < 0);
652 kfree(priv->stations[i].lq);
653 priv->stations[i].lq = NULL;
654 }
Tomas Winkler9f586712008-11-12 13:14:05 -0800655 spin_unlock_irqrestore(&priv->sta_lock, flags);
Tomas Winkler9f586712008-11-12 13:14:05 -0800656}
Johannes Berga30e3112010-09-22 18:02:01 +0200657EXPORT_SYMBOL_GPL(iwl_dealloc_bcast_stations);
Emmanuel Grumbach74805132008-04-14 21:16:09 -0700658
Tomas Winkler66c73db2008-04-15 16:01:40 -0700659#ifdef CONFIG_IWLWIFI_DEBUG
660static void iwl_dump_lq_cmd(struct iwl_priv *priv,
661 struct iwl_link_quality_cmd *lq)
662{
663 int i;
Tomas Winklere1623442009-01-27 14:27:56 -0800664 IWL_DEBUG_RATE(priv, "lq station id 0x%x\n", lq->sta_id);
665 IWL_DEBUG_RATE(priv, "lq ant 0x%X 0x%X\n",
Tomas Winkler66c73db2008-04-15 16:01:40 -0700666 lq->general_params.single_stream_ant_msk,
667 lq->general_params.dual_stream_ant_msk);
668
669 for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++)
Tomas Winklere1623442009-01-27 14:27:56 -0800670 IWL_DEBUG_RATE(priv, "lq index %d 0x%X\n",
Tomas Winkler66c73db2008-04-15 16:01:40 -0700671 i, lq->rs_table[i].rate_n_flags);
672}
673#else
674static inline void iwl_dump_lq_cmd(struct iwl_priv *priv,
675 struct iwl_link_quality_cmd *lq)
676{
677}
678#endif
679
Reinette Chatrefe6b23d2010-02-22 16:24:47 -0800680/**
Reinette Chatre3bce6062010-04-13 16:11:19 -0700681 * is_lq_table_valid() - Test one aspect of LQ cmd for validity
682 *
683 * It sometimes happens when a HT rate has been in use and we
684 * loose connectivity with AP then mac80211 will first tell us that the
685 * current channel is not HT anymore before removing the station. In such a
686 * scenario the RXON flags will be updated to indicate we are not
687 * communicating HT anymore, but the LQ command may still contain HT rates.
688 * Test for this to prevent driver from sending LQ command between the time
689 * RXON flags are updated and when LQ command is updated.
690 */
691static bool is_lq_table_valid(struct iwl_priv *priv,
Johannes Berg7e6a5882010-08-23 10:46:46 +0200692 struct iwl_rxon_context *ctx,
Reinette Chatre3bce6062010-04-13 16:11:19 -0700693 struct iwl_link_quality_cmd *lq)
694{
695 int i;
Reinette Chatre3bce6062010-04-13 16:11:19 -0700696
Johannes Berg7e6a5882010-08-23 10:46:46 +0200697 if (ctx->ht.enabled)
Reinette Chatre3bce6062010-04-13 16:11:19 -0700698 return true;
699
700 IWL_DEBUG_INFO(priv, "Channel %u is not an HT channel\n",
Johannes Berg246ed352010-08-23 10:46:32 +0200701 ctx->active.channel);
Reinette Chatre3bce6062010-04-13 16:11:19 -0700702 for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++) {
703 if (le32_to_cpu(lq->rs_table[i].rate_n_flags) & RATE_MCS_HT_MSK) {
704 IWL_DEBUG_INFO(priv,
705 "index %d of LQ expects HT channel\n",
706 i);
707 return false;
708 }
709 }
710 return true;
711}
712
713/**
Reinette Chatrefe6b23d2010-02-22 16:24:47 -0800714 * iwl_send_lq_cmd() - Send link quality command
715 * @init: This command is sent as part of station initialization right
716 * after station has been added.
717 *
718 * The link quality command is sent as the last step of station creation.
719 * This is the special case in which init is set and we call a callback in
720 * this case to clear the state indicating that station creation is in
721 * progress.
722 */
Johannes Berg7e6a5882010-08-23 10:46:46 +0200723int iwl_send_lq_cmd(struct iwl_priv *priv, struct iwl_rxon_context *ctx,
Reinette Chatrefe6b23d2010-02-22 16:24:47 -0800724 struct iwl_link_quality_cmd *lq, u8 flags, bool init)
Tomas Winkler66c73db2008-04-15 16:01:40 -0700725{
Reinette Chatrefe6b23d2010-02-22 16:24:47 -0800726 int ret = 0;
727 unsigned long flags_spin;
728
Tomas Winkler66c73db2008-04-15 16:01:40 -0700729 struct iwl_host_cmd cmd = {
730 .id = REPLY_TX_LINK_QUALITY_CMD,
731 .len = sizeof(struct iwl_link_quality_cmd),
Johannes Bergc2acea82009-07-24 11:13:05 -0700732 .flags = flags,
Tomas Winkler66c73db2008-04-15 16:01:40 -0700733 .data = lq,
734 };
735
Johannes Berg76c3c692010-03-30 02:46:29 -0700736 if (WARN_ON(lq->sta_id == IWL_INVALID_STATION))
Tomas Winkler66c73db2008-04-15 16:01:40 -0700737 return -EINVAL;
738
Tomas Winkler3ac7f142008-07-21 02:40:14 +0300739 iwl_dump_lq_cmd(priv, lq);
Reinette Chatrefe6b23d2010-02-22 16:24:47 -0800740 BUG_ON(init && (cmd.flags & CMD_ASYNC));
Tomas Winkler66c73db2008-04-15 16:01:40 -0700741
Johannes Berg7e6a5882010-08-23 10:46:46 +0200742 if (is_lq_table_valid(priv, ctx, lq))
Reinette Chatre3bce6062010-04-13 16:11:19 -0700743 ret = iwl_send_cmd(priv, &cmd);
744 else
745 ret = -EINVAL;
Reinette Chatred2e210a2010-04-23 10:33:33 -0700746
747 if (cmd.flags & CMD_ASYNC)
Reinette Chatrefe6b23d2010-02-22 16:24:47 -0800748 return ret;
Tomas Winkler66c73db2008-04-15 16:01:40 -0700749
Reinette Chatrefe6b23d2010-02-22 16:24:47 -0800750 if (init) {
Frans Pop91dd6c22010-03-24 14:19:58 -0700751 IWL_DEBUG_INFO(priv, "init LQ command complete, clearing sta addition status for sta %d\n",
Reinette Chatrefe6b23d2010-02-22 16:24:47 -0800752 lq->sta_id);
753 spin_lock_irqsave(&priv->sta_lock, flags_spin);
754 priv->stations[lq->sta_id].used &= ~IWL_STA_UCODE_INPROGRESS;
755 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
756 }
Reinette Chatred2e210a2010-04-23 10:33:33 -0700757 return ret;
Tomas Winkler66c73db2008-04-15 16:01:40 -0700758}
759EXPORT_SYMBOL(iwl_send_lq_cmd);
760
Reinette Chatrefe6b23d2010-02-22 16:24:47 -0800761int iwl_mac_sta_remove(struct ieee80211_hw *hw,
Johannes Bergfd1af152010-04-30 11:30:43 -0700762 struct ieee80211_vif *vif,
763 struct ieee80211_sta *sta)
Reinette Chatrefe6b23d2010-02-22 16:24:47 -0800764{
Reinette Chatrefe6b23d2010-02-22 16:24:47 -0800765 struct iwl_priv *priv = hw->priv;
Johannes Bergfd1af152010-04-30 11:30:43 -0700766 struct iwl_station_priv_common *sta_common = (void *)sta->drv_priv;
767 int ret;
768
Reinette Chatrefe6b23d2010-02-22 16:24:47 -0800769 IWL_DEBUG_INFO(priv, "received request to remove station %pM\n",
770 sta->addr);
Reinette Chatreda5ae1c2010-05-28 09:28:39 -0700771 mutex_lock(&priv->mutex);
772 IWL_DEBUG_INFO(priv, "proceeding to remove station %pM\n",
773 sta->addr);
Johannes Bergfd1af152010-04-30 11:30:43 -0700774 ret = iwl_remove_station(priv, sta_common->sta_id, sta->addr);
Reinette Chatrefe6b23d2010-02-22 16:24:47 -0800775 if (ret)
776 IWL_ERR(priv, "Error removing station %pM\n",
777 sta->addr);
Reinette Chatreda5ae1c2010-05-28 09:28:39 -0700778 mutex_unlock(&priv->mutex);
Reinette Chatrefe6b23d2010-02-22 16:24:47 -0800779 return ret;
780}
781EXPORT_SYMBOL(iwl_mac_sta_remove);