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6974e363 EG |
1 | /****************************************************************************** |
2 | * | |
1f447808 | 3 | * Copyright(c) 2003 - 2010 Intel Corporation. All rights reserved. |
6974e363 EG |
4 | * |
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: | |
759ef89f | 25 | * Intel Linux Wireless <ilw@linux.intel.com> |
6974e363 EG |
26 | * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 |
27 | * | |
28 | *****************************************************************************/ | |
29 | ||
30 | #include <net/mac80211.h> | |
947b13a7 | 31 | #include <linux/etherdevice.h> |
fe6b23dd | 32 | #include <linux/sched.h> |
4620fefa | 33 | #include <linux/lockdep.h> |
6974e363 | 34 | |
3e0d4cb1 | 35 | #include "iwl-dev.h" |
6974e363 EG |
36 | #include "iwl-core.h" |
37 | #include "iwl-sta.h" | |
7a999bf0 | 38 | |
1fa97aae | 39 | /* priv->sta_lock must be held */ |
24e5c401 EG |
40 | static void iwl_sta_ucode_activate(struct iwl_priv *priv, u8 sta_id) |
41 | { | |
24e5c401 | 42 | |
c587de0b | 43 | if (!(priv->stations[sta_id].used & IWL_STA_DRIVER_ACTIVE)) |
1fa97aae RC |
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); | |
24e5c401 | 46 | |
1fa97aae RC |
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 | } | |
24e5c401 EG |
56 | } |
57 | ||
09034cb7 JB |
58 | static 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) | |
42132bce | 62 | { |
3257e5d4 | 63 | u8 sta_id = addsta->sta.sta_id; |
1fa97aae | 64 | unsigned long flags; |
09034cb7 | 65 | int ret = -EIO; |
42132bce | 66 | |
2f301227 | 67 | if (pkt->hdr.flags & IWL_CMD_FAILED_MSK) { |
15b1687c | 68 | IWL_ERR(priv, "Bad return from REPLY_ADD_STA (0x%08X)\n", |
1fa97aae | 69 | pkt->hdr.flags); |
09034cb7 | 70 | return ret; |
42132bce TW |
71 | } |
72 | ||
1fa97aae RC |
73 | IWL_DEBUG_INFO(priv, "Processing response for adding station %u\n", |
74 | sta_id); | |
75 | ||
76 | spin_lock_irqsave(&priv->sta_lock, flags); | |
77 | ||
2f301227 | 78 | switch (pkt->u.add_sta.status) { |
42132bce | 79 | case ADD_STA_SUCCESS_MSK: |
1fa97aae | 80 | IWL_DEBUG_INFO(priv, "REPLY_ADD_STA PASSED\n"); |
24e5c401 | 81 | iwl_sta_ucode_activate(priv, sta_id); |
09034cb7 | 82 | ret = 0; |
1fa97aae RC |
83 | break; |
84 | case ADD_STA_NO_ROOM_IN_TABLE: | |
85 | IWL_ERR(priv, "Adding station %d failed, no room in table.\n", | |
86 | sta_id); | |
87 | 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: | |
91dd6c27 | 93 | IWL_ERR(priv, "Attempting to modify non-existing station %d\n", |
1fa97aae RC |
94 | sta_id); |
95 | break; | |
42132bce | 96 | default: |
1fa97aae RC |
97 | IWL_DEBUG_ASSOC(priv, "Received REPLY_ADD_STA:(0x%08X)\n", |
98 | pkt->u.add_sta.status); | |
42132bce TW |
99 | break; |
100 | } | |
1fa97aae RC |
101 | |
102 | 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 | |
b595076a | 110 | * written to the command buffer often is not the same MAC address |
1fa97aae RC |
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); | |
1fa97aae | 119 | spin_unlock_irqrestore(&priv->sta_lock, flags); |
09034cb7 JB |
120 | |
121 | return ret; | |
1fa97aae RC |
122 | } |
123 | ||
124 | static void iwl_add_sta_callback(struct iwl_priv *priv, | |
125 | struct iwl_device_cmd *cmd, | |
126 | struct iwl_rx_packet *pkt) | |
127 | { | |
128 | struct iwl_addsta_cmd *addsta = | |
129 | (struct iwl_addsta_cmd *)cmd->cmd.payload; | |
130 | ||
131 | iwl_process_add_sta_resp(priv, addsta, pkt, false); | |
132 | ||
42132bce TW |
133 | } |
134 | ||
17f841cd | 135 | int iwl_send_add_sta(struct iwl_priv *priv, |
133636de TW |
136 | struct iwl_addsta_cmd *sta, u8 flags) |
137 | { | |
2f301227 | 138 | struct iwl_rx_packet *pkt = NULL; |
133636de TW |
139 | int ret = 0; |
140 | u8 data[sizeof(*sta)]; | |
141 | struct iwl_host_cmd cmd = { | |
142 | .id = REPLY_ADD_STA, | |
c2acea8e | 143 | .flags = flags, |
133636de TW |
144 | .data = data, |
145 | }; | |
f875f518 | 146 | u8 sta_id __maybe_unused = sta->sta.sta_id; |
fe6b23dd RC |
147 | |
148 | IWL_DEBUG_INFO(priv, "Adding sta %u (%pM) %ssynchronously\n", | |
149 | sta_id, sta->sta.addr, flags & CMD_ASYNC ? "a" : ""); | |
133636de | 150 | |
42132bce | 151 | if (flags & CMD_ASYNC) |
c2acea8e | 152 | cmd.callback = iwl_add_sta_callback; |
4620fefa | 153 | else { |
c2acea8e | 154 | cmd.flags |= CMD_WANT_SKB; |
4620fefa JB |
155 | might_sleep(); |
156 | } | |
133636de TW |
157 | |
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 | ||
133636de | 164 | if (ret == 0) { |
1fa97aae | 165 | pkt = (struct iwl_rx_packet *)cmd.reply_page; |
09034cb7 | 166 | ret = iwl_process_add_sta_resp(priv, sta, pkt, true); |
133636de | 167 | } |
64a76b50 | 168 | iwl_free_pages(priv, cmd.reply_page); |
133636de TW |
169 | |
170 | return ret; | |
171 | } | |
17f841cd | 172 | EXPORT_SYMBOL(iwl_send_add_sta); |
947b13a7 | 173 | |
4f40e4d9 | 174 | static void iwl_set_ht_add_station(struct iwl_priv *priv, u8 index, |
7e6a5886 JB |
175 | struct ieee80211_sta *sta, |
176 | struct iwl_rxon_context *ctx) | |
4f40e4d9 | 177 | { |
238d781d | 178 | struct ieee80211_sta_ht_cap *sta_ht_inf = &sta->ht_cap; |
4f40e4d9 TW |
179 | __le32 sta_flags; |
180 | u8 mimo_ps_mode; | |
181 | ||
238d781d | 182 | if (!sta || !sta_ht_inf->ht_supported) |
4f40e4d9 TW |
183 | goto done; |
184 | ||
00c5ae2f | 185 | mimo_ps_mode = (sta_ht_inf->cap & IEEE80211_HT_CAP_SM_PS) >> 2; |
3f3e0376 WYG |
186 | 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"); | |
4f40e4d9 TW |
191 | |
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) { | |
00c5ae2f | 197 | case WLAN_HT_CAP_SM_PS_STATIC: |
4f40e4d9 TW |
198 | sta_flags |= STA_FLG_MIMO_DIS_MSK; |
199 | break; | |
00c5ae2f | 200 | case WLAN_HT_CAP_SM_PS_DYNAMIC: |
4f40e4d9 TW |
201 | sta_flags |= STA_FLG_RTS_MIMO_PROT_MSK; |
202 | break; | |
00c5ae2f | 203 | case WLAN_HT_CAP_SM_PS_DISABLED: |
4f40e4d9 TW |
204 | break; |
205 | default: | |
39aadf8c | 206 | IWL_WARN(priv, "Invalid MIMO PS mode %d\n", mimo_ps_mode); |
4f40e4d9 TW |
207 | 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 | ||
7e6a5886 | 216 | if (iwl_is_ht40_tx_allowed(priv, ctx, &sta->ht_cap)) |
7aafef1c | 217 | sta_flags |= STA_FLG_HT40_EN_MSK; |
4f40e4d9 | 218 | else |
7aafef1c | 219 | sta_flags &= ~STA_FLG_HT40_EN_MSK; |
4f40e4d9 TW |
220 | |
221 | priv->stations[index].sta.station_flags = sta_flags; | |
222 | done: | |
223 | return; | |
224 | } | |
4f40e4d9 TW |
225 | |
226 | /** | |
fe6b23dd RC |
227 | * iwl_prep_station - Prepare station information for addition |
228 | * | |
229 | * should be called with sta_lock held | |
4f40e4d9 | 230 | */ |
a30e3112 JB |
231 | u8 iwl_prep_station(struct iwl_priv *priv, struct iwl_rxon_context *ctx, |
232 | const u8 *addr, bool is_ap, struct ieee80211_sta *sta) | |
4f40e4d9 | 233 | { |
4f40e4d9 | 234 | struct iwl_station_entry *station; |
c587de0b | 235 | int i; |
fe6b23dd | 236 | u8 sta_id = IWL_INVALID_STATION; |
c587de0b | 237 | u16 rate; |
4f40e4d9 | 238 | |
4f40e4d9 | 239 | if (is_ap) |
2995bafa | 240 | sta_id = ctx->ap_sta_id; |
4f40e4d9 | 241 | else if (is_broadcast_ether_addr(addr)) |
a194e324 | 242 | sta_id = ctx->bcast_sta_id; |
4f40e4d9 TW |
243 | 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)) { | |
24e5c401 | 247 | sta_id = i; |
4f40e4d9 TW |
248 | break; |
249 | } | |
250 | ||
251 | if (!priv->stations[i].used && | |
24e5c401 EG |
252 | sta_id == IWL_INVALID_STATION) |
253 | sta_id = i; | |
4f40e4d9 TW |
254 | } |
255 | ||
fe6b23dd RC |
256 | /* |
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); | |
24e5c401 | 271 | return sta_id; |
4f40e4d9 TW |
272 | } |
273 | ||
fe6b23dd RC |
274 | if ((priv->stations[sta_id].used & IWL_STA_DRIVER_ACTIVE) && |
275 | (priv->stations[sta_id].used & IWL_STA_UCODE_ACTIVE) && | |
24e5c401 | 276 | !compare_ether_addr(priv->stations[sta_id].sta.sta.addr, addr)) { |
fe6b23dd RC |
277 | IWL_DEBUG_ASSOC(priv, "STA %d (%pM) already added, not adding again.\n", |
278 | sta_id, addr); | |
24e5c401 | 279 | return sta_id; |
4f40e4d9 TW |
280 | } |
281 | ||
24e5c401 EG |
282 | station = &priv->stations[sta_id]; |
283 | station->used = IWL_STA_DRIVER_ACTIVE; | |
e1623446 | 284 | IWL_DEBUG_ASSOC(priv, "Add STA to driver ID %d: %pM\n", |
e174961c | 285 | sta_id, addr); |
4f40e4d9 TW |
286 | 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; | |
24e5c401 | 292 | station->sta.sta.sta_id = sta_id; |
770e13bd | 293 | station->sta.station_flags = ctx->station_flags; |
dcef732c | 294 | station->ctxid = ctx->ctxid; |
4f40e4d9 | 295 | |
238d781d JB |
296 | 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 | ||
63d41769 JB |
303 | /* |
304 | * OK to call unconditionally, since local stations (IBSS BSSID | |
238d781d | 305 | * STA and broadcast STA) pass in a NULL sta, and mac80211 |
63d41769 JB |
306 | * doesn't allow HT IBSS. |
307 | */ | |
7e6a5886 | 308 | iwl_set_ht_add_station(priv, sta_id, sta, ctx); |
4f40e4d9 | 309 | |
c587de0b TW |
310 | /* 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 | ||
fe6b23dd RC |
316 | return sta_id; |
317 | ||
318 | } | |
a30e3112 | 319 | EXPORT_SYMBOL_GPL(iwl_prep_station); |
fe6b23dd RC |
320 | |
321 | #define STA_WAIT_TIMEOUT (HZ/2) | |
322 | ||
323 | /** | |
324 | * iwl_add_station_common - | |
325 | */ | |
a194e324 JB |
326 | int iwl_add_station_common(struct iwl_priv *priv, struct iwl_rxon_context *ctx, |
327 | const u8 *addr, bool is_ap, | |
238d781d | 328 | struct ieee80211_sta *sta, u8 *sta_id_r) |
fe6b23dd | 329 | { |
fe6b23dd RC |
330 | unsigned long flags_spin; |
331 | int ret = 0; | |
332 | u8 sta_id; | |
9c5ac091 | 333 | struct iwl_addsta_cmd sta_cmd; |
fe6b23dd RC |
334 | |
335 | *sta_id_r = 0; | |
336 | spin_lock_irqsave(&priv->sta_lock, flags_spin); | |
238d781d | 337 | sta_id = iwl_prep_station(priv, ctx, addr, is_ap, sta); |
fe6b23dd RC |
338 | 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 | } | |
344 | ||
345 | /* | |
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 | } | |
356 | ||
357 | 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 | } | |
364 | ||
365 | priv->stations[sta_id].used |= IWL_STA_UCODE_INPROGRESS; | |
9c5ac091 | 366 | memcpy(&sta_cmd, &priv->stations[sta_id].sta, sizeof(struct iwl_addsta_cmd)); |
4f40e4d9 TW |
367 | spin_unlock_irqrestore(&priv->sta_lock, flags_spin); |
368 | ||
369 | /* Add station to device's station table */ | |
9c5ac091 | 370 | ret = iwl_send_add_sta(priv, &sta_cmd, CMD_SYNC); |
fe6b23dd | 371 | if (ret) { |
fe6b23dd | 372 | spin_lock_irqsave(&priv->sta_lock, flags_spin); |
9c5ac091 RC |
373 | IWL_ERR(priv, "Adding station %pM failed.\n", |
374 | priv->stations[sta_id].sta.sta.addr); | |
fe6b23dd RC |
375 | 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; | |
4f40e4d9 | 381 | } |
fe6b23dd | 382 | EXPORT_SYMBOL(iwl_add_station_common); |
4f40e4d9 | 383 | |
fe6b23dd RC |
384 | /** |
385 | * iwl_sta_ucode_deactivate - deactivate ucode status for a station | |
386 | * | |
387 | * priv->sta_lock must be held | |
388 | */ | |
389 | static void iwl_sta_ucode_deactivate(struct iwl_priv *priv, u8 sta_id) | |
390 | { | |
391 | /* Ucode must be active and driver must be non active */ | |
d2e210ae RC |
392 | if ((priv->stations[sta_id].used & |
393 | (IWL_STA_UCODE_ACTIVE | IWL_STA_DRIVER_ACTIVE)) != IWL_STA_UCODE_ACTIVE) | |
fe6b23dd RC |
394 | IWL_ERR(priv, "removed non active STA %u\n", sta_id); |
395 | ||
396 | priv->stations[sta_id].used &= ~IWL_STA_UCODE_ACTIVE; | |
397 | ||
398 | memset(&priv->stations[sta_id], 0, sizeof(struct iwl_station_entry)); | |
399 | IWL_DEBUG_ASSOC(priv, "Removed STA %u\n", sta_id); | |
7a999bf0 TW |
400 | } |
401 | ||
fe6b23dd | 402 | static int iwl_send_remove_station(struct iwl_priv *priv, |
9c5ac091 | 403 | const u8 *addr, int sta_id) |
7a999bf0 | 404 | { |
2f301227 | 405 | struct iwl_rx_packet *pkt; |
7a999bf0 TW |
406 | int ret; |
407 | ||
fe6b23dd | 408 | unsigned long flags_spin; |
7a999bf0 TW |
409 | 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), | |
fe6b23dd | 414 | .flags = CMD_SYNC, |
7a999bf0 TW |
415 | .data = &rm_sta_cmd, |
416 | }; | |
417 | ||
418 | memset(&rm_sta_cmd, 0, sizeof(rm_sta_cmd)); | |
419 | rm_sta_cmd.num_sta = 1; | |
9c5ac091 | 420 | memcpy(&rm_sta_cmd.addr, addr, ETH_ALEN); |
fe6b23dd RC |
421 | |
422 | cmd.flags |= CMD_WANT_SKB; | |
7a999bf0 | 423 | |
7a999bf0 TW |
424 | ret = iwl_send_cmd(priv, &cmd); |
425 | ||
fe6b23dd | 426 | if (ret) |
7a999bf0 TW |
427 | return ret; |
428 | ||
2f301227 ZY |
429 | pkt = (struct iwl_rx_packet *)cmd.reply_page; |
430 | if (pkt->hdr.flags & IWL_CMD_FAILED_MSK) { | |
15b1687c | 431 | IWL_ERR(priv, "Bad return from REPLY_REMOVE_STA (0x%08X)\n", |
2f301227 | 432 | pkt->hdr.flags); |
7a999bf0 TW |
433 | ret = -EIO; |
434 | } | |
435 | ||
436 | if (!ret) { | |
2f301227 | 437 | switch (pkt->u.rem_sta.status) { |
7a999bf0 | 438 | case REM_STA_SUCCESS_MSK: |
fe6b23dd | 439 | spin_lock_irqsave(&priv->sta_lock, flags_spin); |
9c5ac091 | 440 | iwl_sta_ucode_deactivate(priv, sta_id); |
fe6b23dd | 441 | spin_unlock_irqrestore(&priv->sta_lock, flags_spin); |
e1623446 | 442 | IWL_DEBUG_ASSOC(priv, "REPLY_REMOVE_STA PASSED\n"); |
7a999bf0 TW |
443 | break; |
444 | default: | |
445 | ret = -EIO; | |
15b1687c | 446 | IWL_ERR(priv, "REPLY_REMOVE_STA failed\n"); |
7a999bf0 TW |
447 | break; |
448 | } | |
449 | } | |
64a76b50 | 450 | iwl_free_pages(priv, cmd.reply_page); |
7a999bf0 TW |
451 | |
452 | return ret; | |
453 | } | |
be1f3ab6 | 454 | |
7a999bf0 TW |
455 | /** |
456 | * iwl_remove_station - Remove driver's knowledge of station. | |
7a999bf0 | 457 | */ |
fd1af15d JB |
458 | int iwl_remove_station(struct iwl_priv *priv, const u8 sta_id, |
459 | const u8 *addr) | |
7a999bf0 | 460 | { |
fd1af15d | 461 | unsigned long flags; |
fe6b23dd RC |
462 | |
463 | if (!iwl_is_ready(priv)) { | |
464 | IWL_DEBUG_INFO(priv, | |
91dd6c27 | 465 | "Unable to remove station %pM, device not ready.\n", |
c0222df8 | 466 | addr); |
fe6b23dd RC |
467 | /* |
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 | } | |
7a999bf0 | 474 | |
fd1af15d JB |
475 | IWL_DEBUG_ASSOC(priv, "Removing STA from driver:%d %pM\n", |
476 | sta_id, addr); | |
7a999bf0 | 477 | |
fd1af15d JB |
478 | if (WARN_ON(sta_id == IWL_INVALID_STATION)) |
479 | return -EINVAL; | |
7a999bf0 | 480 | |
fd1af15d | 481 | spin_lock_irqsave(&priv->sta_lock, flags); |
24e5c401 EG |
482 | |
483 | if (!(priv->stations[sta_id].used & IWL_STA_DRIVER_ACTIVE)) { | |
fe6b23dd | 484 | IWL_DEBUG_INFO(priv, "Removing %pM but non DRIVER active\n", |
c0222df8 | 485 | addr); |
fd1af15d | 486 | goto out_err; |
24e5c401 EG |
487 | } |
488 | ||
489 | if (!(priv->stations[sta_id].used & IWL_STA_UCODE_ACTIVE)) { | |
fe6b23dd | 490 | IWL_DEBUG_INFO(priv, "Removing %pM but non UCODE active\n", |
c0222df8 | 491 | addr); |
fd1af15d | 492 | goto out_err; |
7a999bf0 TW |
493 | } |
494 | ||
1fa61b2e JB |
495 | if (priv->stations[sta_id].used & IWL_STA_LOCAL) { |
496 | kfree(priv->stations[sta_id].lq); | |
497 | priv->stations[sta_id].lq = NULL; | |
498 | } | |
24e5c401 EG |
499 | |
500 | priv->stations[sta_id].used &= ~IWL_STA_DRIVER_ACTIVE; | |
501 | ||
502 | priv->num_stations--; | |
503 | ||
7a999bf0 | 504 | BUG_ON(priv->num_stations < 0); |
24e5c401 | 505 | |
7a999bf0 | 506 | spin_unlock_irqrestore(&priv->sta_lock, flags); |
24e5c401 | 507 | |
9c5ac091 | 508 | return iwl_send_remove_station(priv, addr, sta_id); |
fd1af15d | 509 | out_err: |
7a999bf0 | 510 | spin_unlock_irqrestore(&priv->sta_lock, flags); |
fd1af15d | 511 | return -EINVAL; |
7a999bf0 | 512 | } |
1fa61b2e | 513 | EXPORT_SYMBOL_GPL(iwl_remove_station); |
24e5c401 | 514 | |
83dde8c9 | 515 | /** |
2c810ccd JB |
516 | * 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. | |
83dde8c9 | 522 | */ |
dcef732c JB |
523 | void iwl_clear_ucode_stations(struct iwl_priv *priv, |
524 | struct iwl_rxon_context *ctx) | |
83dde8c9 | 525 | { |
48676eb3 | 526 | int i; |
7e246191 RC |
527 | unsigned long flags_spin; |
528 | bool cleared = false; | |
529 | ||
2c810ccd | 530 | IWL_DEBUG_INFO(priv, "Clearing ucode stations in driver\n"); |
83dde8c9 | 531 | |
7e246191 | 532 | spin_lock_irqsave(&priv->sta_lock, flags_spin); |
2c810ccd | 533 | for (i = 0; i < priv->hw_params.max_stations; i++) { |
dcef732c JB |
534 | if (ctx && ctx->ctxid != priv->stations[i].ctxid) |
535 | continue; | |
536 | ||
2c810ccd JB |
537 | 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; | |
7e246191 RC |
541 | } |
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"); | |
547 | } | |
548 | EXPORT_SYMBOL(iwl_clear_ucode_stations); | |
83dde8c9 | 549 | |
7e246191 RC |
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. | |
fe6b23dd RC |
555 | * |
556 | * Function sleeps. | |
7e246191 | 557 | */ |
dcef732c | 558 | void iwl_restore_stations(struct iwl_priv *priv, struct iwl_rxon_context *ctx) |
7e246191 | 559 | { |
9c5ac091 RC |
560 | struct iwl_addsta_cmd sta_cmd; |
561 | struct iwl_link_quality_cmd lq; | |
7e246191 RC |
562 | unsigned long flags_spin; |
563 | int i; | |
564 | bool found = false; | |
fe6b23dd | 565 | int ret; |
9c5ac091 | 566 | bool send_lq; |
83dde8c9 | 567 | |
7e246191 RC |
568 | if (!iwl_is_ready(priv)) { |
569 | IWL_DEBUG_INFO(priv, "Not ready yet, not restoring any stations.\n"); | |
570 | return; | |
571 | } | |
83dde8c9 | 572 | |
7e246191 RC |
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++) { | |
dcef732c JB |
576 | if (ctx->ctxid != priv->stations[i].ctxid) |
577 | continue; | |
7e246191 RC |
578 | 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 | } | |
5e46882e | 587 | |
7e246191 RC |
588 | for (i = 0; i < priv->hw_params.max_stations; i++) { |
589 | if ((priv->stations[i].used & IWL_STA_UCODE_INPROGRESS)) { | |
9c5ac091 RC |
590 | 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 | } | |
fe6b23dd | 598 | spin_unlock_irqrestore(&priv->sta_lock, flags_spin); |
9c5ac091 | 599 | ret = iwl_send_add_sta(priv, &sta_cmd, CMD_SYNC); |
fe6b23dd | 600 | if (ret) { |
fe6b23dd | 601 | spin_lock_irqsave(&priv->sta_lock, flags_spin); |
9c5ac091 RC |
602 | IWL_ERR(priv, "Adding station %pM failed.\n", |
603 | priv->stations[i].sta.sta.addr); | |
fe6b23dd RC |
604 | 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 | */ | |
9c5ac091 | 612 | if (send_lq) |
7e6a5886 | 613 | iwl_send_lq_cmd(priv, ctx, &lq, CMD_SYNC, true); |
fe6b23dd | 614 | spin_lock_irqsave(&priv->sta_lock, flags_spin); |
7e246191 RC |
615 | priv->stations[i].used &= ~IWL_STA_UCODE_INPROGRESS; |
616 | } | |
48676eb3 MA |
617 | } |
618 | ||
7e246191 RC |
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 | |
fe6b23dd | 623 | IWL_DEBUG_INFO(priv, "Restoring all known stations .... complete.\n"); |
83dde8c9 | 624 | } |
7e246191 | 625 | EXPORT_SYMBOL(iwl_restore_stations); |
83dde8c9 | 626 | |
6e21f15c | 627 | int iwl_get_free_ucode_key_index(struct iwl_priv *priv) |
80fb47a1 EG |
628 | { |
629 | int i; | |
630 | ||
c10afb6e | 631 | for (i = 0; i < priv->sta_key_max_num; i++) |
77bab602 | 632 | if (!test_and_set_bit(i, &priv->ucode_key_table)) |
80fb47a1 EG |
633 | return i; |
634 | ||
40a9a829 | 635 | return WEP_INVALID_OFFSET; |
80fb47a1 | 636 | } |
6e21f15c | 637 | EXPORT_SYMBOL(iwl_get_free_ucode_key_index); |
6974e363 | 638 | |
a30e3112 | 639 | void iwl_dealloc_bcast_stations(struct iwl_priv *priv) |
9f58671e | 640 | { |
9f58671e | 641 | unsigned long flags; |
9f58671e | 642 | int i; |
9f58671e | 643 | |
7480513f | 644 | spin_lock_irqsave(&priv->sta_lock, flags); |
a30e3112 JB |
645 | for (i = 0; i < priv->hw_params.max_stations; i++) { |
646 | if (!(priv->stations[i].used & IWL_STA_BCAST)) | |
647 | continue; | |
40a9a829 | 648 | |
a30e3112 JB |
649 | 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; | |
2d1bb9e5 | 654 | } |
3ec47732 | 655 | spin_unlock_irqrestore(&priv->sta_lock, flags); |
7480513f | 656 | } |
a30e3112 | 657 | EXPORT_SYMBOL_GPL(iwl_dealloc_bcast_stations); |
7480513f | 658 | |
66c73db7 TW |
659 | #ifdef CONFIG_IWLWIFI_DEBUG |
660 | static void iwl_dump_lq_cmd(struct iwl_priv *priv, | |
661 | struct iwl_link_quality_cmd *lq) | |
662 | { | |
663 | int i; | |
e1623446 TW |
664 | 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", | |
66c73db7 TW |
666 | 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++) | |
e1623446 | 670 | IWL_DEBUG_RATE(priv, "lq index %d 0x%X\n", |
66c73db7 TW |
671 | i, lq->rs_table[i].rate_n_flags); |
672 | } | |
673 | #else | |
674 | static inline void iwl_dump_lq_cmd(struct iwl_priv *priv, | |
675 | struct iwl_link_quality_cmd *lq) | |
676 | { | |
677 | } | |
678 | #endif | |
679 | ||
3bce6066 RC |
680 | /** |
681 | * 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 | */ | |
691 | static bool is_lq_table_valid(struct iwl_priv *priv, | |
7e6a5886 | 692 | struct iwl_rxon_context *ctx, |
3bce6066 RC |
693 | struct iwl_link_quality_cmd *lq) |
694 | { | |
695 | int i; | |
3bce6066 | 696 | |
7e6a5886 | 697 | if (ctx->ht.enabled) |
3bce6066 RC |
698 | return true; |
699 | ||
700 | IWL_DEBUG_INFO(priv, "Channel %u is not an HT channel\n", | |
246ed355 | 701 | ctx->active.channel); |
3bce6066 RC |
702 | 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 | ||
fe6b23dd RC |
713 | /** |
714 | * 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 | */ | |
7e6a5886 | 723 | int iwl_send_lq_cmd(struct iwl_priv *priv, struct iwl_rxon_context *ctx, |
fe6b23dd | 724 | struct iwl_link_quality_cmd *lq, u8 flags, bool init) |
66c73db7 | 725 | { |
fe6b23dd RC |
726 | int ret = 0; |
727 | unsigned long flags_spin; | |
728 | ||
66c73db7 TW |
729 | struct iwl_host_cmd cmd = { |
730 | .id = REPLY_TX_LINK_QUALITY_CMD, | |
731 | .len = sizeof(struct iwl_link_quality_cmd), | |
c2acea8e | 732 | .flags = flags, |
66c73db7 TW |
733 | .data = lq, |
734 | }; | |
735 | ||
76c3c698 | 736 | if (WARN_ON(lq->sta_id == IWL_INVALID_STATION)) |
66c73db7 TW |
737 | return -EINVAL; |
738 | ||
3ac7f146 | 739 | iwl_dump_lq_cmd(priv, lq); |
fe6b23dd | 740 | BUG_ON(init && (cmd.flags & CMD_ASYNC)); |
66c73db7 | 741 | |
7e6a5886 | 742 | if (is_lq_table_valid(priv, ctx, lq)) |
3bce6066 RC |
743 | ret = iwl_send_cmd(priv, &cmd); |
744 | else | |
745 | ret = -EINVAL; | |
d2e210ae RC |
746 | |
747 | if (cmd.flags & CMD_ASYNC) | |
fe6b23dd | 748 | return ret; |
66c73db7 | 749 | |
fe6b23dd | 750 | if (init) { |
91dd6c27 | 751 | IWL_DEBUG_INFO(priv, "init LQ command complete, clearing sta addition status for sta %d\n", |
fe6b23dd RC |
752 | 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 | } | |
d2e210ae | 757 | return ret; |
66c73db7 TW |
758 | } |
759 | EXPORT_SYMBOL(iwl_send_lq_cmd); | |
760 | ||
fe6b23dd | 761 | int iwl_mac_sta_remove(struct ieee80211_hw *hw, |
fd1af15d JB |
762 | struct ieee80211_vif *vif, |
763 | struct ieee80211_sta *sta) | |
fe6b23dd | 764 | { |
fe6b23dd | 765 | struct iwl_priv *priv = hw->priv; |
fd1af15d JB |
766 | struct iwl_station_priv_common *sta_common = (void *)sta->drv_priv; |
767 | int ret; | |
768 | ||
fe6b23dd RC |
769 | IWL_DEBUG_INFO(priv, "received request to remove station %pM\n", |
770 | sta->addr); | |
da5ae1cf RC |
771 | mutex_lock(&priv->mutex); |
772 | IWL_DEBUG_INFO(priv, "proceeding to remove station %pM\n", | |
773 | sta->addr); | |
fd1af15d | 774 | ret = iwl_remove_station(priv, sta_common->sta_id, sta->addr); |
fe6b23dd RC |
775 | if (ret) |
776 | IWL_ERR(priv, "Error removing station %pM\n", | |
777 | sta->addr); | |
da5ae1cf | 778 | mutex_unlock(&priv->mutex); |
fe6b23dd RC |
779 | return ret; |
780 | } | |
781 | EXPORT_SYMBOL(iwl_mac_sta_remove); |