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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 | } | |
947b13a7 | 172 | |
4f40e4d9 | 173 | static void iwl_set_ht_add_station(struct iwl_priv *priv, u8 index, |
7e6a5886 JB |
174 | struct ieee80211_sta *sta, |
175 | struct iwl_rxon_context *ctx) | |
4f40e4d9 | 176 | { |
238d781d | 177 | struct ieee80211_sta_ht_cap *sta_ht_inf = &sta->ht_cap; |
4f40e4d9 TW |
178 | __le32 sta_flags; |
179 | u8 mimo_ps_mode; | |
180 | ||
238d781d | 181 | if (!sta || !sta_ht_inf->ht_supported) |
4f40e4d9 TW |
182 | goto done; |
183 | ||
00c5ae2f | 184 | mimo_ps_mode = (sta_ht_inf->cap & IEEE80211_HT_CAP_SM_PS) >> 2; |
3f3e0376 WYG |
185 | IWL_DEBUG_ASSOC(priv, "spatial multiplexing power save mode: %s\n", |
186 | (mimo_ps_mode == WLAN_HT_CAP_SM_PS_STATIC) ? | |
187 | "static" : | |
188 | (mimo_ps_mode == WLAN_HT_CAP_SM_PS_DYNAMIC) ? | |
189 | "dynamic" : "disabled"); | |
4f40e4d9 TW |
190 | |
191 | sta_flags = priv->stations[index].sta.station_flags; | |
192 | ||
193 | sta_flags &= ~(STA_FLG_RTS_MIMO_PROT_MSK | STA_FLG_MIMO_DIS_MSK); | |
194 | ||
195 | switch (mimo_ps_mode) { | |
00c5ae2f | 196 | case WLAN_HT_CAP_SM_PS_STATIC: |
4f40e4d9 TW |
197 | sta_flags |= STA_FLG_MIMO_DIS_MSK; |
198 | break; | |
00c5ae2f | 199 | case WLAN_HT_CAP_SM_PS_DYNAMIC: |
4f40e4d9 TW |
200 | sta_flags |= STA_FLG_RTS_MIMO_PROT_MSK; |
201 | break; | |
00c5ae2f | 202 | case WLAN_HT_CAP_SM_PS_DISABLED: |
4f40e4d9 TW |
203 | break; |
204 | default: | |
39aadf8c | 205 | IWL_WARN(priv, "Invalid MIMO PS mode %d\n", mimo_ps_mode); |
4f40e4d9 TW |
206 | break; |
207 | } | |
208 | ||
209 | sta_flags |= cpu_to_le32( | |
210 | (u32)sta_ht_inf->ampdu_factor << STA_FLG_MAX_AGG_SIZE_POS); | |
211 | ||
212 | sta_flags |= cpu_to_le32( | |
213 | (u32)sta_ht_inf->ampdu_density << STA_FLG_AGG_MPDU_DENSITY_POS); | |
214 | ||
7e6a5886 | 215 | if (iwl_is_ht40_tx_allowed(priv, ctx, &sta->ht_cap)) |
7aafef1c | 216 | sta_flags |= STA_FLG_HT40_EN_MSK; |
4f40e4d9 | 217 | else |
7aafef1c | 218 | sta_flags &= ~STA_FLG_HT40_EN_MSK; |
4f40e4d9 TW |
219 | |
220 | priv->stations[index].sta.station_flags = sta_flags; | |
221 | done: | |
222 | return; | |
223 | } | |
4f40e4d9 TW |
224 | |
225 | /** | |
fe6b23dd RC |
226 | * iwl_prep_station - Prepare station information for addition |
227 | * | |
228 | * should be called with sta_lock held | |
4f40e4d9 | 229 | */ |
a30e3112 JB |
230 | u8 iwl_prep_station(struct iwl_priv *priv, struct iwl_rxon_context *ctx, |
231 | const u8 *addr, bool is_ap, struct ieee80211_sta *sta) | |
4f40e4d9 | 232 | { |
4f40e4d9 | 233 | struct iwl_station_entry *station; |
c587de0b | 234 | int i; |
fe6b23dd | 235 | u8 sta_id = IWL_INVALID_STATION; |
c587de0b | 236 | u16 rate; |
4f40e4d9 | 237 | |
4f40e4d9 | 238 | if (is_ap) |
2995bafa | 239 | sta_id = ctx->ap_sta_id; |
4f40e4d9 | 240 | else if (is_broadcast_ether_addr(addr)) |
a194e324 | 241 | sta_id = ctx->bcast_sta_id; |
4f40e4d9 TW |
242 | else |
243 | for (i = IWL_STA_ID; i < priv->hw_params.max_stations; i++) { | |
244 | if (!compare_ether_addr(priv->stations[i].sta.sta.addr, | |
245 | addr)) { | |
24e5c401 | 246 | sta_id = i; |
4f40e4d9 TW |
247 | break; |
248 | } | |
249 | ||
250 | if (!priv->stations[i].used && | |
24e5c401 EG |
251 | sta_id == IWL_INVALID_STATION) |
252 | sta_id = i; | |
4f40e4d9 TW |
253 | } |
254 | ||
fe6b23dd RC |
255 | /* |
256 | * These two conditions have the same outcome, but keep them | |
257 | * separate | |
258 | */ | |
259 | if (unlikely(sta_id == IWL_INVALID_STATION)) | |
260 | return sta_id; | |
261 | ||
262 | /* | |
263 | * uCode is not able to deal with multiple requests to add a | |
264 | * station. Keep track if one is in progress so that we do not send | |
265 | * another. | |
266 | */ | |
267 | if (priv->stations[sta_id].used & IWL_STA_UCODE_INPROGRESS) { | |
268 | IWL_DEBUG_INFO(priv, "STA %d already in process of being added.\n", | |
269 | sta_id); | |
24e5c401 | 270 | return sta_id; |
4f40e4d9 TW |
271 | } |
272 | ||
fe6b23dd RC |
273 | if ((priv->stations[sta_id].used & IWL_STA_DRIVER_ACTIVE) && |
274 | (priv->stations[sta_id].used & IWL_STA_UCODE_ACTIVE) && | |
24e5c401 | 275 | !compare_ether_addr(priv->stations[sta_id].sta.sta.addr, addr)) { |
fe6b23dd RC |
276 | IWL_DEBUG_ASSOC(priv, "STA %d (%pM) already added, not adding again.\n", |
277 | sta_id, addr); | |
24e5c401 | 278 | return sta_id; |
4f40e4d9 TW |
279 | } |
280 | ||
24e5c401 EG |
281 | station = &priv->stations[sta_id]; |
282 | station->used = IWL_STA_DRIVER_ACTIVE; | |
e1623446 | 283 | IWL_DEBUG_ASSOC(priv, "Add STA to driver ID %d: %pM\n", |
e174961c | 284 | sta_id, addr); |
4f40e4d9 TW |
285 | priv->num_stations++; |
286 | ||
287 | /* Set up the REPLY_ADD_STA command to send to device */ | |
288 | memset(&station->sta, 0, sizeof(struct iwl_addsta_cmd)); | |
289 | memcpy(station->sta.sta.addr, addr, ETH_ALEN); | |
290 | station->sta.mode = 0; | |
24e5c401 | 291 | station->sta.sta.sta_id = sta_id; |
770e13bd | 292 | station->sta.station_flags = ctx->station_flags; |
dcef732c | 293 | station->ctxid = ctx->ctxid; |
4f40e4d9 | 294 | |
238d781d JB |
295 | if (sta) { |
296 | struct iwl_station_priv_common *sta_priv; | |
297 | ||
298 | sta_priv = (void *)sta->drv_priv; | |
299 | sta_priv->ctx = ctx; | |
300 | } | |
301 | ||
63d41769 JB |
302 | /* |
303 | * OK to call unconditionally, since local stations (IBSS BSSID | |
238d781d | 304 | * STA and broadcast STA) pass in a NULL sta, and mac80211 |
63d41769 JB |
305 | * doesn't allow HT IBSS. |
306 | */ | |
7e6a5886 | 307 | iwl_set_ht_add_station(priv, sta_id, sta, ctx); |
4f40e4d9 | 308 | |
c587de0b TW |
309 | /* 3945 only */ |
310 | rate = (priv->band == IEEE80211_BAND_5GHZ) ? | |
311 | IWL_RATE_6M_PLCP : IWL_RATE_1M_PLCP; | |
312 | /* Turn on both antennas for the station... */ | |
313 | station->sta.rate_n_flags = cpu_to_le16(rate | RATE_MCS_ANT_AB_MSK); | |
314 | ||
fe6b23dd RC |
315 | return sta_id; |
316 | ||
317 | } | |
318 | ||
319 | #define STA_WAIT_TIMEOUT (HZ/2) | |
320 | ||
321 | /** | |
322 | * iwl_add_station_common - | |
323 | */ | |
a194e324 JB |
324 | int iwl_add_station_common(struct iwl_priv *priv, struct iwl_rxon_context *ctx, |
325 | const u8 *addr, bool is_ap, | |
238d781d | 326 | struct ieee80211_sta *sta, u8 *sta_id_r) |
fe6b23dd | 327 | { |
fe6b23dd RC |
328 | unsigned long flags_spin; |
329 | int ret = 0; | |
330 | u8 sta_id; | |
9c5ac091 | 331 | struct iwl_addsta_cmd sta_cmd; |
fe6b23dd RC |
332 | |
333 | *sta_id_r = 0; | |
334 | spin_lock_irqsave(&priv->sta_lock, flags_spin); | |
238d781d | 335 | sta_id = iwl_prep_station(priv, ctx, addr, is_ap, sta); |
fe6b23dd RC |
336 | if (sta_id == IWL_INVALID_STATION) { |
337 | IWL_ERR(priv, "Unable to prepare station %pM for addition\n", | |
338 | addr); | |
339 | spin_unlock_irqrestore(&priv->sta_lock, flags_spin); | |
340 | return -EINVAL; | |
341 | } | |
342 | ||
343 | /* | |
344 | * uCode is not able to deal with multiple requests to add a | |
345 | * station. Keep track if one is in progress so that we do not send | |
346 | * another. | |
347 | */ | |
348 | if (priv->stations[sta_id].used & IWL_STA_UCODE_INPROGRESS) { | |
349 | IWL_DEBUG_INFO(priv, "STA %d already in process of being added.\n", | |
350 | sta_id); | |
351 | spin_unlock_irqrestore(&priv->sta_lock, flags_spin); | |
352 | return -EEXIST; | |
353 | } | |
354 | ||
355 | if ((priv->stations[sta_id].used & IWL_STA_DRIVER_ACTIVE) && | |
356 | (priv->stations[sta_id].used & IWL_STA_UCODE_ACTIVE)) { | |
357 | IWL_DEBUG_ASSOC(priv, "STA %d (%pM) already added, not adding again.\n", | |
358 | sta_id, addr); | |
359 | spin_unlock_irqrestore(&priv->sta_lock, flags_spin); | |
360 | return -EEXIST; | |
361 | } | |
362 | ||
363 | priv->stations[sta_id].used |= IWL_STA_UCODE_INPROGRESS; | |
9c5ac091 | 364 | memcpy(&sta_cmd, &priv->stations[sta_id].sta, sizeof(struct iwl_addsta_cmd)); |
4f40e4d9 TW |
365 | spin_unlock_irqrestore(&priv->sta_lock, flags_spin); |
366 | ||
367 | /* Add station to device's station table */ | |
9c5ac091 | 368 | ret = iwl_send_add_sta(priv, &sta_cmd, CMD_SYNC); |
fe6b23dd | 369 | if (ret) { |
fe6b23dd | 370 | spin_lock_irqsave(&priv->sta_lock, flags_spin); |
9c5ac091 RC |
371 | IWL_ERR(priv, "Adding station %pM failed.\n", |
372 | priv->stations[sta_id].sta.sta.addr); | |
fe6b23dd RC |
373 | priv->stations[sta_id].used &= ~IWL_STA_DRIVER_ACTIVE; |
374 | priv->stations[sta_id].used &= ~IWL_STA_UCODE_INPROGRESS; | |
375 | spin_unlock_irqrestore(&priv->sta_lock, flags_spin); | |
376 | } | |
377 | *sta_id_r = sta_id; | |
378 | return ret; | |
4f40e4d9 | 379 | } |
4f40e4d9 | 380 | |
fe6b23dd RC |
381 | /** |
382 | * iwl_sta_ucode_deactivate - deactivate ucode status for a station | |
383 | * | |
384 | * priv->sta_lock must be held | |
385 | */ | |
386 | static void iwl_sta_ucode_deactivate(struct iwl_priv *priv, u8 sta_id) | |
387 | { | |
388 | /* Ucode must be active and driver must be non active */ | |
d2e210ae RC |
389 | if ((priv->stations[sta_id].used & |
390 | (IWL_STA_UCODE_ACTIVE | IWL_STA_DRIVER_ACTIVE)) != IWL_STA_UCODE_ACTIVE) | |
fe6b23dd RC |
391 | IWL_ERR(priv, "removed non active STA %u\n", sta_id); |
392 | ||
393 | priv->stations[sta_id].used &= ~IWL_STA_UCODE_ACTIVE; | |
394 | ||
395 | memset(&priv->stations[sta_id], 0, sizeof(struct iwl_station_entry)); | |
396 | IWL_DEBUG_ASSOC(priv, "Removed STA %u\n", sta_id); | |
7a999bf0 TW |
397 | } |
398 | ||
fe6b23dd | 399 | static int iwl_send_remove_station(struct iwl_priv *priv, |
2b5f7a67 JB |
400 | const u8 *addr, int sta_id, |
401 | bool temporary) | |
7a999bf0 | 402 | { |
2f301227 | 403 | struct iwl_rx_packet *pkt; |
7a999bf0 TW |
404 | int ret; |
405 | ||
fe6b23dd | 406 | unsigned long flags_spin; |
7a999bf0 TW |
407 | struct iwl_rem_sta_cmd rm_sta_cmd; |
408 | ||
409 | struct iwl_host_cmd cmd = { | |
410 | .id = REPLY_REMOVE_STA, | |
411 | .len = sizeof(struct iwl_rem_sta_cmd), | |
fe6b23dd | 412 | .flags = CMD_SYNC, |
7a999bf0 TW |
413 | .data = &rm_sta_cmd, |
414 | }; | |
415 | ||
416 | memset(&rm_sta_cmd, 0, sizeof(rm_sta_cmd)); | |
417 | rm_sta_cmd.num_sta = 1; | |
9c5ac091 | 418 | memcpy(&rm_sta_cmd.addr, addr, ETH_ALEN); |
fe6b23dd RC |
419 | |
420 | cmd.flags |= CMD_WANT_SKB; | |
7a999bf0 | 421 | |
7a999bf0 TW |
422 | ret = iwl_send_cmd(priv, &cmd); |
423 | ||
fe6b23dd | 424 | if (ret) |
7a999bf0 TW |
425 | return ret; |
426 | ||
2f301227 ZY |
427 | pkt = (struct iwl_rx_packet *)cmd.reply_page; |
428 | if (pkt->hdr.flags & IWL_CMD_FAILED_MSK) { | |
15b1687c | 429 | IWL_ERR(priv, "Bad return from REPLY_REMOVE_STA (0x%08X)\n", |
2f301227 | 430 | pkt->hdr.flags); |
7a999bf0 TW |
431 | ret = -EIO; |
432 | } | |
433 | ||
434 | if (!ret) { | |
2f301227 | 435 | switch (pkt->u.rem_sta.status) { |
7a999bf0 | 436 | case REM_STA_SUCCESS_MSK: |
2b5f7a67 JB |
437 | if (!temporary) { |
438 | spin_lock_irqsave(&priv->sta_lock, flags_spin); | |
439 | iwl_sta_ucode_deactivate(priv, sta_id); | |
440 | spin_unlock_irqrestore(&priv->sta_lock, flags_spin); | |
441 | } | |
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 | |
2b5f7a67 | 508 | return iwl_send_remove_station(priv, addr, sta_id, false); |
fd1af15d | 509 | out_err: |
7a999bf0 | 510 | spin_unlock_irqrestore(&priv->sta_lock, flags); |
fd1af15d | 511 | return -EINVAL; |
7a999bf0 | 512 | } |
24e5c401 | 513 | |
83dde8c9 | 514 | /** |
2c810ccd JB |
515 | * iwl_clear_ucode_stations - clear ucode station table bits |
516 | * | |
517 | * This function clears all the bits in the driver indicating | |
518 | * which stations are active in the ucode. Call when something | |
519 | * other than explicit station management would cause this in | |
520 | * the ucode, e.g. unassociated RXON. | |
83dde8c9 | 521 | */ |
dcef732c JB |
522 | void iwl_clear_ucode_stations(struct iwl_priv *priv, |
523 | struct iwl_rxon_context *ctx) | |
83dde8c9 | 524 | { |
48676eb3 | 525 | int i; |
7e246191 RC |
526 | unsigned long flags_spin; |
527 | bool cleared = false; | |
528 | ||
2c810ccd | 529 | IWL_DEBUG_INFO(priv, "Clearing ucode stations in driver\n"); |
83dde8c9 | 530 | |
7e246191 | 531 | spin_lock_irqsave(&priv->sta_lock, flags_spin); |
2c810ccd | 532 | for (i = 0; i < priv->hw_params.max_stations; i++) { |
dcef732c JB |
533 | if (ctx && ctx->ctxid != priv->stations[i].ctxid) |
534 | continue; | |
535 | ||
2c810ccd JB |
536 | if (priv->stations[i].used & IWL_STA_UCODE_ACTIVE) { |
537 | IWL_DEBUG_INFO(priv, "Clearing ucode active for station %d\n", i); | |
538 | priv->stations[i].used &= ~IWL_STA_UCODE_ACTIVE; | |
539 | cleared = true; | |
7e246191 RC |
540 | } |
541 | } | |
542 | spin_unlock_irqrestore(&priv->sta_lock, flags_spin); | |
543 | ||
544 | if (!cleared) | |
545 | IWL_DEBUG_INFO(priv, "No active stations found to be cleared\n"); | |
546 | } | |
83dde8c9 | 547 | |
7e246191 RC |
548 | /** |
549 | * iwl_restore_stations() - Restore driver known stations to device | |
550 | * | |
551 | * All stations considered active by driver, but not present in ucode, is | |
552 | * restored. | |
fe6b23dd RC |
553 | * |
554 | * Function sleeps. | |
7e246191 | 555 | */ |
dcef732c | 556 | void iwl_restore_stations(struct iwl_priv *priv, struct iwl_rxon_context *ctx) |
7e246191 | 557 | { |
9c5ac091 RC |
558 | struct iwl_addsta_cmd sta_cmd; |
559 | struct iwl_link_quality_cmd lq; | |
7e246191 RC |
560 | unsigned long flags_spin; |
561 | int i; | |
562 | bool found = false; | |
fe6b23dd | 563 | int ret; |
9c5ac091 | 564 | bool send_lq; |
83dde8c9 | 565 | |
7e246191 RC |
566 | if (!iwl_is_ready(priv)) { |
567 | IWL_DEBUG_INFO(priv, "Not ready yet, not restoring any stations.\n"); | |
568 | return; | |
569 | } | |
83dde8c9 | 570 | |
7e246191 RC |
571 | IWL_DEBUG_ASSOC(priv, "Restoring all known stations ... start.\n"); |
572 | spin_lock_irqsave(&priv->sta_lock, flags_spin); | |
573 | for (i = 0; i < priv->hw_params.max_stations; i++) { | |
dcef732c JB |
574 | if (ctx->ctxid != priv->stations[i].ctxid) |
575 | continue; | |
7e246191 RC |
576 | if ((priv->stations[i].used & IWL_STA_DRIVER_ACTIVE) && |
577 | !(priv->stations[i].used & IWL_STA_UCODE_ACTIVE)) { | |
578 | IWL_DEBUG_ASSOC(priv, "Restoring sta %pM\n", | |
579 | priv->stations[i].sta.sta.addr); | |
580 | priv->stations[i].sta.mode = 0; | |
581 | priv->stations[i].used |= IWL_STA_UCODE_INPROGRESS; | |
582 | found = true; | |
583 | } | |
584 | } | |
5e46882e | 585 | |
7e246191 RC |
586 | for (i = 0; i < priv->hw_params.max_stations; i++) { |
587 | if ((priv->stations[i].used & IWL_STA_UCODE_INPROGRESS)) { | |
9c5ac091 RC |
588 | memcpy(&sta_cmd, &priv->stations[i].sta, |
589 | sizeof(struct iwl_addsta_cmd)); | |
590 | send_lq = false; | |
591 | if (priv->stations[i].lq) { | |
592 | memcpy(&lq, priv->stations[i].lq, | |
593 | sizeof(struct iwl_link_quality_cmd)); | |
594 | send_lq = true; | |
595 | } | |
fe6b23dd | 596 | spin_unlock_irqrestore(&priv->sta_lock, flags_spin); |
9c5ac091 | 597 | ret = iwl_send_add_sta(priv, &sta_cmd, CMD_SYNC); |
fe6b23dd | 598 | if (ret) { |
fe6b23dd | 599 | spin_lock_irqsave(&priv->sta_lock, flags_spin); |
9c5ac091 RC |
600 | IWL_ERR(priv, "Adding station %pM failed.\n", |
601 | priv->stations[i].sta.sta.addr); | |
fe6b23dd RC |
602 | priv->stations[i].used &= ~IWL_STA_DRIVER_ACTIVE; |
603 | priv->stations[i].used &= ~IWL_STA_UCODE_INPROGRESS; | |
604 | spin_unlock_irqrestore(&priv->sta_lock, flags_spin); | |
605 | } | |
606 | /* | |
607 | * Rate scaling has already been initialized, send | |
608 | * current LQ command | |
609 | */ | |
9c5ac091 | 610 | if (send_lq) |
7e6a5886 | 611 | iwl_send_lq_cmd(priv, ctx, &lq, CMD_SYNC, true); |
fe6b23dd | 612 | spin_lock_irqsave(&priv->sta_lock, flags_spin); |
7e246191 RC |
613 | priv->stations[i].used &= ~IWL_STA_UCODE_INPROGRESS; |
614 | } | |
48676eb3 MA |
615 | } |
616 | ||
7e246191 RC |
617 | spin_unlock_irqrestore(&priv->sta_lock, flags_spin); |
618 | if (!found) | |
619 | IWL_DEBUG_INFO(priv, "Restoring all known stations .... no stations to be restored.\n"); | |
620 | else | |
fe6b23dd | 621 | IWL_DEBUG_INFO(priv, "Restoring all known stations .... complete.\n"); |
83dde8c9 | 622 | } |
83dde8c9 | 623 | |
2b5f7a67 JB |
624 | void iwl_reprogram_ap_sta(struct iwl_priv *priv, struct iwl_rxon_context *ctx) |
625 | { | |
626 | unsigned long flags; | |
627 | int sta_id = ctx->ap_sta_id; | |
628 | int ret; | |
629 | struct iwl_addsta_cmd sta_cmd; | |
630 | struct iwl_link_quality_cmd lq; | |
631 | bool active; | |
632 | ||
633 | spin_lock_irqsave(&priv->sta_lock, flags); | |
634 | if (!(priv->stations[sta_id].used & IWL_STA_DRIVER_ACTIVE)) { | |
635 | spin_unlock_irqrestore(&priv->sta_lock, flags); | |
636 | return; | |
637 | } | |
638 | ||
639 | memcpy(&sta_cmd, &priv->stations[sta_id].sta, sizeof(sta_cmd)); | |
640 | sta_cmd.mode = 0; | |
641 | memcpy(&lq, priv->stations[sta_id].lq, sizeof(lq)); | |
642 | ||
643 | active = priv->stations[sta_id].used & IWL_STA_UCODE_ACTIVE; | |
40b97c2f | 644 | priv->stations[sta_id].used &= ~IWL_STA_DRIVER_ACTIVE; |
2b5f7a67 JB |
645 | spin_unlock_irqrestore(&priv->sta_lock, flags); |
646 | ||
647 | if (active) { | |
648 | ret = iwl_send_remove_station( | |
649 | priv, priv->stations[sta_id].sta.sta.addr, | |
650 | sta_id, true); | |
651 | if (ret) | |
652 | IWL_ERR(priv, "failed to remove STA %pM (%d)\n", | |
653 | priv->stations[sta_id].sta.sta.addr, ret); | |
654 | } | |
40b97c2f WYG |
655 | spin_lock_irqsave(&priv->sta_lock, flags); |
656 | priv->stations[sta_id].used |= IWL_STA_DRIVER_ACTIVE; | |
657 | spin_unlock_irqrestore(&priv->sta_lock, flags); | |
658 | ||
2b5f7a67 JB |
659 | ret = iwl_send_add_sta(priv, &sta_cmd, CMD_SYNC); |
660 | if (ret) | |
661 | IWL_ERR(priv, "failed to re-add STA %pM (%d)\n", | |
662 | priv->stations[sta_id].sta.sta.addr, ret); | |
663 | iwl_send_lq_cmd(priv, ctx, &lq, CMD_SYNC, true); | |
664 | } | |
2b5f7a67 | 665 | |
6e21f15c | 666 | int iwl_get_free_ucode_key_index(struct iwl_priv *priv) |
80fb47a1 EG |
667 | { |
668 | int i; | |
669 | ||
c10afb6e | 670 | for (i = 0; i < priv->sta_key_max_num; i++) |
77bab602 | 671 | if (!test_and_set_bit(i, &priv->ucode_key_table)) |
80fb47a1 EG |
672 | return i; |
673 | ||
40a9a829 | 674 | return WEP_INVALID_OFFSET; |
80fb47a1 | 675 | } |
6974e363 | 676 | |
a30e3112 | 677 | void iwl_dealloc_bcast_stations(struct iwl_priv *priv) |
9f58671e | 678 | { |
9f58671e | 679 | unsigned long flags; |
9f58671e | 680 | int i; |
9f58671e | 681 | |
7480513f | 682 | spin_lock_irqsave(&priv->sta_lock, flags); |
a30e3112 JB |
683 | for (i = 0; i < priv->hw_params.max_stations; i++) { |
684 | if (!(priv->stations[i].used & IWL_STA_BCAST)) | |
685 | continue; | |
40a9a829 | 686 | |
a30e3112 JB |
687 | priv->stations[i].used &= ~IWL_STA_UCODE_ACTIVE; |
688 | priv->num_stations--; | |
689 | BUG_ON(priv->num_stations < 0); | |
690 | kfree(priv->stations[i].lq); | |
691 | priv->stations[i].lq = NULL; | |
2d1bb9e5 | 692 | } |
3ec47732 | 693 | spin_unlock_irqrestore(&priv->sta_lock, flags); |
7480513f EG |
694 | } |
695 | ||
66c73db7 TW |
696 | #ifdef CONFIG_IWLWIFI_DEBUG |
697 | static void iwl_dump_lq_cmd(struct iwl_priv *priv, | |
698 | struct iwl_link_quality_cmd *lq) | |
699 | { | |
700 | int i; | |
e1623446 TW |
701 | IWL_DEBUG_RATE(priv, "lq station id 0x%x\n", lq->sta_id); |
702 | IWL_DEBUG_RATE(priv, "lq ant 0x%X 0x%X\n", | |
66c73db7 TW |
703 | lq->general_params.single_stream_ant_msk, |
704 | lq->general_params.dual_stream_ant_msk); | |
705 | ||
706 | for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++) | |
e1623446 | 707 | IWL_DEBUG_RATE(priv, "lq index %d 0x%X\n", |
66c73db7 TW |
708 | i, lq->rs_table[i].rate_n_flags); |
709 | } | |
710 | #else | |
711 | static inline void iwl_dump_lq_cmd(struct iwl_priv *priv, | |
712 | struct iwl_link_quality_cmd *lq) | |
713 | { | |
714 | } | |
715 | #endif | |
716 | ||
3bce6066 RC |
717 | /** |
718 | * is_lq_table_valid() - Test one aspect of LQ cmd for validity | |
719 | * | |
720 | * It sometimes happens when a HT rate has been in use and we | |
721 | * loose connectivity with AP then mac80211 will first tell us that the | |
722 | * current channel is not HT anymore before removing the station. In such a | |
723 | * scenario the RXON flags will be updated to indicate we are not | |
724 | * communicating HT anymore, but the LQ command may still contain HT rates. | |
725 | * Test for this to prevent driver from sending LQ command between the time | |
726 | * RXON flags are updated and when LQ command is updated. | |
727 | */ | |
728 | static bool is_lq_table_valid(struct iwl_priv *priv, | |
7e6a5886 | 729 | struct iwl_rxon_context *ctx, |
3bce6066 RC |
730 | struct iwl_link_quality_cmd *lq) |
731 | { | |
732 | int i; | |
3bce6066 | 733 | |
7e6a5886 | 734 | if (ctx->ht.enabled) |
3bce6066 RC |
735 | return true; |
736 | ||
737 | IWL_DEBUG_INFO(priv, "Channel %u is not an HT channel\n", | |
246ed355 | 738 | ctx->active.channel); |
3bce6066 RC |
739 | for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++) { |
740 | if (le32_to_cpu(lq->rs_table[i].rate_n_flags) & RATE_MCS_HT_MSK) { | |
741 | IWL_DEBUG_INFO(priv, | |
742 | "index %d of LQ expects HT channel\n", | |
743 | i); | |
744 | return false; | |
745 | } | |
746 | } | |
747 | return true; | |
748 | } | |
749 | ||
fe6b23dd RC |
750 | /** |
751 | * iwl_send_lq_cmd() - Send link quality command | |
752 | * @init: This command is sent as part of station initialization right | |
753 | * after station has been added. | |
754 | * | |
755 | * The link quality command is sent as the last step of station creation. | |
756 | * This is the special case in which init is set and we call a callback in | |
757 | * this case to clear the state indicating that station creation is in | |
758 | * progress. | |
759 | */ | |
7e6a5886 | 760 | int iwl_send_lq_cmd(struct iwl_priv *priv, struct iwl_rxon_context *ctx, |
fe6b23dd | 761 | struct iwl_link_quality_cmd *lq, u8 flags, bool init) |
66c73db7 | 762 | { |
fe6b23dd RC |
763 | int ret = 0; |
764 | unsigned long flags_spin; | |
765 | ||
66c73db7 TW |
766 | struct iwl_host_cmd cmd = { |
767 | .id = REPLY_TX_LINK_QUALITY_CMD, | |
768 | .len = sizeof(struct iwl_link_quality_cmd), | |
c2acea8e | 769 | .flags = flags, |
66c73db7 TW |
770 | .data = lq, |
771 | }; | |
772 | ||
76c3c698 | 773 | if (WARN_ON(lq->sta_id == IWL_INVALID_STATION)) |
66c73db7 TW |
774 | return -EINVAL; |
775 | ||
40b97c2f WYG |
776 | |
777 | spin_lock_irqsave(&priv->sta_lock, flags_spin); | |
778 | if (!(priv->stations[lq->sta_id].used & IWL_STA_DRIVER_ACTIVE)) { | |
779 | spin_unlock_irqrestore(&priv->sta_lock, flags_spin); | |
780 | return -EINVAL; | |
781 | } | |
782 | spin_unlock_irqrestore(&priv->sta_lock, flags_spin); | |
783 | ||
3ac7f146 | 784 | iwl_dump_lq_cmd(priv, lq); |
fe6b23dd | 785 | BUG_ON(init && (cmd.flags & CMD_ASYNC)); |
66c73db7 | 786 | |
7e6a5886 | 787 | if (is_lq_table_valid(priv, ctx, lq)) |
3bce6066 RC |
788 | ret = iwl_send_cmd(priv, &cmd); |
789 | else | |
790 | ret = -EINVAL; | |
d2e210ae RC |
791 | |
792 | if (cmd.flags & CMD_ASYNC) | |
fe6b23dd | 793 | return ret; |
66c73db7 | 794 | |
fe6b23dd | 795 | if (init) { |
91dd6c27 | 796 | IWL_DEBUG_INFO(priv, "init LQ command complete, clearing sta addition status for sta %d\n", |
fe6b23dd RC |
797 | lq->sta_id); |
798 | spin_lock_irqsave(&priv->sta_lock, flags_spin); | |
799 | priv->stations[lq->sta_id].used &= ~IWL_STA_UCODE_INPROGRESS; | |
800 | spin_unlock_irqrestore(&priv->sta_lock, flags_spin); | |
801 | } | |
d2e210ae | 802 | return ret; |
66c73db7 | 803 | } |
66c73db7 | 804 | |
fe6b23dd | 805 | int iwl_mac_sta_remove(struct ieee80211_hw *hw, |
fd1af15d JB |
806 | struct ieee80211_vif *vif, |
807 | struct ieee80211_sta *sta) | |
fe6b23dd | 808 | { |
fe6b23dd | 809 | struct iwl_priv *priv = hw->priv; |
fd1af15d JB |
810 | struct iwl_station_priv_common *sta_common = (void *)sta->drv_priv; |
811 | int ret; | |
812 | ||
fe6b23dd RC |
813 | IWL_DEBUG_INFO(priv, "received request to remove station %pM\n", |
814 | sta->addr); | |
da5ae1cf RC |
815 | mutex_lock(&priv->mutex); |
816 | IWL_DEBUG_INFO(priv, "proceeding to remove station %pM\n", | |
817 | sta->addr); | |
fd1af15d | 818 | ret = iwl_remove_station(priv, sta_common->sta_id, sta->addr); |
fe6b23dd RC |
819 | if (ret) |
820 | IWL_ERR(priv, "Error removing station %pM\n", | |
821 | sta->addr); | |
da5ae1cf | 822 | mutex_unlock(&priv->mutex); |
fe6b23dd RC |
823 | return ret; |
824 | } |