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6974e363 EG |
1 | /****************************************************************************** |
2 | * | |
901069c7 | 3 | * Copyright(c) 2003 - 2011 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" | |
bdfbf092 | 38 | #include "iwl-trans.h" |
5c3d29fc | 39 | #include "iwl-agn.h" |
7a999bf0 | 40 | |
1fa97aae | 41 | /* priv->sta_lock must be held */ |
24e5c401 EG |
42 | static void iwl_sta_ucode_activate(struct iwl_priv *priv, u8 sta_id) |
43 | { | |
24e5c401 | 44 | |
c587de0b | 45 | if (!(priv->stations[sta_id].used & IWL_STA_DRIVER_ACTIVE)) |
1fa97aae RC |
46 | IWL_ERR(priv, "ACTIVATE a non DRIVER active station id %u addr %pM\n", |
47 | sta_id, priv->stations[sta_id].sta.sta.addr); | |
24e5c401 | 48 | |
1fa97aae RC |
49 | if (priv->stations[sta_id].used & IWL_STA_UCODE_ACTIVE) { |
50 | IWL_DEBUG_ASSOC(priv, | |
51 | "STA id %u addr %pM already present in uCode (according to driver)\n", | |
52 | sta_id, priv->stations[sta_id].sta.sta.addr); | |
53 | } else { | |
54 | priv->stations[sta_id].used |= IWL_STA_UCODE_ACTIVE; | |
55 | IWL_DEBUG_ASSOC(priv, "Added STA id %u addr %pM to uCode\n", | |
56 | sta_id, priv->stations[sta_id].sta.sta.addr); | |
57 | } | |
24e5c401 EG |
58 | } |
59 | ||
09034cb7 JB |
60 | static int iwl_process_add_sta_resp(struct iwl_priv *priv, |
61 | struct iwl_addsta_cmd *addsta, | |
62 | struct iwl_rx_packet *pkt, | |
63 | bool sync) | |
42132bce | 64 | { |
3257e5d4 | 65 | u8 sta_id = addsta->sta.sta_id; |
1fa97aae | 66 | unsigned long flags; |
09034cb7 | 67 | int ret = -EIO; |
42132bce | 68 | |
2f301227 | 69 | if (pkt->hdr.flags & IWL_CMD_FAILED_MSK) { |
15b1687c | 70 | IWL_ERR(priv, "Bad return from REPLY_ADD_STA (0x%08X)\n", |
1fa97aae | 71 | pkt->hdr.flags); |
09034cb7 | 72 | return ret; |
42132bce TW |
73 | } |
74 | ||
1fa97aae RC |
75 | IWL_DEBUG_INFO(priv, "Processing response for adding station %u\n", |
76 | sta_id); | |
77 | ||
78 | spin_lock_irqsave(&priv->sta_lock, flags); | |
79 | ||
2f301227 | 80 | switch (pkt->u.add_sta.status) { |
42132bce | 81 | case ADD_STA_SUCCESS_MSK: |
1fa97aae | 82 | IWL_DEBUG_INFO(priv, "REPLY_ADD_STA PASSED\n"); |
24e5c401 | 83 | iwl_sta_ucode_activate(priv, sta_id); |
09034cb7 | 84 | ret = 0; |
1fa97aae RC |
85 | break; |
86 | case ADD_STA_NO_ROOM_IN_TABLE: | |
87 | IWL_ERR(priv, "Adding station %d failed, no room in table.\n", | |
88 | sta_id); | |
89 | break; | |
90 | case ADD_STA_NO_BLOCK_ACK_RESOURCE: | |
91 | IWL_ERR(priv, "Adding station %d failed, no block ack resource.\n", | |
92 | sta_id); | |
93 | break; | |
94 | case ADD_STA_MODIFY_NON_EXIST_STA: | |
91dd6c27 | 95 | IWL_ERR(priv, "Attempting to modify non-existing station %d\n", |
1fa97aae RC |
96 | sta_id); |
97 | break; | |
42132bce | 98 | default: |
1fa97aae RC |
99 | IWL_DEBUG_ASSOC(priv, "Received REPLY_ADD_STA:(0x%08X)\n", |
100 | pkt->u.add_sta.status); | |
42132bce TW |
101 | break; |
102 | } | |
1fa97aae RC |
103 | |
104 | IWL_DEBUG_INFO(priv, "%s station id %u addr %pM\n", | |
105 | priv->stations[sta_id].sta.mode == | |
106 | STA_CONTROL_MODIFY_MSK ? "Modified" : "Added", | |
107 | sta_id, priv->stations[sta_id].sta.sta.addr); | |
108 | ||
109 | /* | |
110 | * XXX: The MAC address in the command buffer is often changed from | |
111 | * the original sent to the device. That is, the MAC address | |
b595076a | 112 | * written to the command buffer often is not the same MAC address |
1fa97aae RC |
113 | * read from the command buffer when the command returns. This |
114 | * issue has not yet been resolved and this debugging is left to | |
115 | * observe the problem. | |
116 | */ | |
117 | IWL_DEBUG_INFO(priv, "%s station according to cmd buffer %pM\n", | |
118 | priv->stations[sta_id].sta.mode == | |
119 | STA_CONTROL_MODIFY_MSK ? "Modified" : "Added", | |
120 | addsta->sta.addr); | |
1fa97aae | 121 | spin_unlock_irqrestore(&priv->sta_lock, flags); |
09034cb7 JB |
122 | |
123 | return ret; | |
1fa97aae RC |
124 | } |
125 | ||
126 | static void iwl_add_sta_callback(struct iwl_priv *priv, | |
127 | struct iwl_device_cmd *cmd, | |
128 | struct iwl_rx_packet *pkt) | |
129 | { | |
130 | struct iwl_addsta_cmd *addsta = | |
131 | (struct iwl_addsta_cmd *)cmd->cmd.payload; | |
132 | ||
133 | iwl_process_add_sta_resp(priv, addsta, pkt, false); | |
134 | ||
42132bce TW |
135 | } |
136 | ||
5c3d29fc DF |
137 | static u16 iwlagn_build_addsta_hcmd(const struct iwl_addsta_cmd *cmd, u8 *data) |
138 | { | |
139 | u16 size = (u16)sizeof(struct iwl_addsta_cmd); | |
140 | struct iwl_addsta_cmd *addsta = (struct iwl_addsta_cmd *)data; | |
141 | memcpy(addsta, cmd, size); | |
142 | /* resrved in 5000 */ | |
143 | addsta->rate_n_flags = cpu_to_le16(0); | |
144 | return size; | |
145 | } | |
146 | ||
17f841cd | 147 | int iwl_send_add_sta(struct iwl_priv *priv, |
133636de TW |
148 | struct iwl_addsta_cmd *sta, u8 flags) |
149 | { | |
2f301227 | 150 | struct iwl_rx_packet *pkt = NULL; |
133636de TW |
151 | int ret = 0; |
152 | u8 data[sizeof(*sta)]; | |
153 | struct iwl_host_cmd cmd = { | |
154 | .id = REPLY_ADD_STA, | |
c2acea8e | 155 | .flags = flags, |
3fa50738 | 156 | .data = { data, }, |
133636de | 157 | }; |
f875f518 | 158 | u8 sta_id __maybe_unused = sta->sta.sta_id; |
fe6b23dd RC |
159 | |
160 | IWL_DEBUG_INFO(priv, "Adding sta %u (%pM) %ssynchronously\n", | |
161 | sta_id, sta->sta.addr, flags & CMD_ASYNC ? "a" : ""); | |
133636de | 162 | |
42132bce | 163 | if (flags & CMD_ASYNC) |
c2acea8e | 164 | cmd.callback = iwl_add_sta_callback; |
4620fefa | 165 | else { |
c2acea8e | 166 | cmd.flags |= CMD_WANT_SKB; |
4620fefa JB |
167 | might_sleep(); |
168 | } | |
133636de | 169 | |
5c3d29fc | 170 | cmd.len[0] = iwlagn_build_addsta_hcmd(sta, data); |
bdfbf092 | 171 | ret = trans_send_cmd(priv, &cmd); |
133636de TW |
172 | |
173 | if (ret || (flags & CMD_ASYNC)) | |
174 | return ret; | |
175 | ||
133636de | 176 | if (ret == 0) { |
1fa97aae | 177 | pkt = (struct iwl_rx_packet *)cmd.reply_page; |
09034cb7 | 178 | ret = iwl_process_add_sta_resp(priv, sta, pkt, true); |
133636de | 179 | } |
64a76b50 | 180 | iwl_free_pages(priv, cmd.reply_page); |
133636de TW |
181 | |
182 | return ret; | |
183 | } | |
947b13a7 | 184 | |
4f40e4d9 | 185 | static void iwl_set_ht_add_station(struct iwl_priv *priv, u8 index, |
7e6a5886 JB |
186 | struct ieee80211_sta *sta, |
187 | struct iwl_rxon_context *ctx) | |
4f40e4d9 | 188 | { |
238d781d | 189 | struct ieee80211_sta_ht_cap *sta_ht_inf = &sta->ht_cap; |
4f40e4d9 TW |
190 | __le32 sta_flags; |
191 | u8 mimo_ps_mode; | |
192 | ||
238d781d | 193 | if (!sta || !sta_ht_inf->ht_supported) |
4f40e4d9 TW |
194 | goto done; |
195 | ||
00c5ae2f | 196 | mimo_ps_mode = (sta_ht_inf->cap & IEEE80211_HT_CAP_SM_PS) >> 2; |
3f3e0376 WYG |
197 | IWL_DEBUG_ASSOC(priv, "spatial multiplexing power save mode: %s\n", |
198 | (mimo_ps_mode == WLAN_HT_CAP_SM_PS_STATIC) ? | |
199 | "static" : | |
200 | (mimo_ps_mode == WLAN_HT_CAP_SM_PS_DYNAMIC) ? | |
201 | "dynamic" : "disabled"); | |
4f40e4d9 TW |
202 | |
203 | sta_flags = priv->stations[index].sta.station_flags; | |
204 | ||
205 | sta_flags &= ~(STA_FLG_RTS_MIMO_PROT_MSK | STA_FLG_MIMO_DIS_MSK); | |
206 | ||
207 | switch (mimo_ps_mode) { | |
00c5ae2f | 208 | case WLAN_HT_CAP_SM_PS_STATIC: |
4f40e4d9 TW |
209 | sta_flags |= STA_FLG_MIMO_DIS_MSK; |
210 | break; | |
00c5ae2f | 211 | case WLAN_HT_CAP_SM_PS_DYNAMIC: |
4f40e4d9 TW |
212 | sta_flags |= STA_FLG_RTS_MIMO_PROT_MSK; |
213 | break; | |
00c5ae2f | 214 | case WLAN_HT_CAP_SM_PS_DISABLED: |
4f40e4d9 TW |
215 | break; |
216 | default: | |
39aadf8c | 217 | IWL_WARN(priv, "Invalid MIMO PS mode %d\n", mimo_ps_mode); |
4f40e4d9 TW |
218 | break; |
219 | } | |
220 | ||
221 | sta_flags |= cpu_to_le32( | |
222 | (u32)sta_ht_inf->ampdu_factor << STA_FLG_MAX_AGG_SIZE_POS); | |
223 | ||
224 | sta_flags |= cpu_to_le32( | |
225 | (u32)sta_ht_inf->ampdu_density << STA_FLG_AGG_MPDU_DENSITY_POS); | |
226 | ||
7e6a5886 | 227 | if (iwl_is_ht40_tx_allowed(priv, ctx, &sta->ht_cap)) |
7aafef1c | 228 | sta_flags |= STA_FLG_HT40_EN_MSK; |
4f40e4d9 | 229 | else |
7aafef1c | 230 | sta_flags &= ~STA_FLG_HT40_EN_MSK; |
4f40e4d9 TW |
231 | |
232 | priv->stations[index].sta.station_flags = sta_flags; | |
233 | done: | |
234 | return; | |
235 | } | |
4f40e4d9 TW |
236 | |
237 | /** | |
fe6b23dd RC |
238 | * iwl_prep_station - Prepare station information for addition |
239 | * | |
240 | * should be called with sta_lock held | |
4f40e4d9 | 241 | */ |
a30e3112 JB |
242 | u8 iwl_prep_station(struct iwl_priv *priv, struct iwl_rxon_context *ctx, |
243 | const u8 *addr, bool is_ap, struct ieee80211_sta *sta) | |
4f40e4d9 | 244 | { |
4f40e4d9 | 245 | struct iwl_station_entry *station; |
c587de0b | 246 | int i; |
fe6b23dd | 247 | u8 sta_id = IWL_INVALID_STATION; |
4f40e4d9 | 248 | |
4f40e4d9 | 249 | if (is_ap) |
2995bafa | 250 | sta_id = ctx->ap_sta_id; |
4f40e4d9 | 251 | else if (is_broadcast_ether_addr(addr)) |
a194e324 | 252 | sta_id = ctx->bcast_sta_id; |
4f40e4d9 TW |
253 | else |
254 | for (i = IWL_STA_ID; i < priv->hw_params.max_stations; i++) { | |
255 | if (!compare_ether_addr(priv->stations[i].sta.sta.addr, | |
256 | addr)) { | |
24e5c401 | 257 | sta_id = i; |
4f40e4d9 TW |
258 | break; |
259 | } | |
260 | ||
261 | if (!priv->stations[i].used && | |
24e5c401 EG |
262 | sta_id == IWL_INVALID_STATION) |
263 | sta_id = i; | |
4f40e4d9 TW |
264 | } |
265 | ||
fe6b23dd RC |
266 | /* |
267 | * These two conditions have the same outcome, but keep them | |
268 | * separate | |
269 | */ | |
270 | if (unlikely(sta_id == IWL_INVALID_STATION)) | |
271 | return sta_id; | |
272 | ||
273 | /* | |
274 | * uCode is not able to deal with multiple requests to add a | |
275 | * station. Keep track if one is in progress so that we do not send | |
276 | * another. | |
277 | */ | |
278 | if (priv->stations[sta_id].used & IWL_STA_UCODE_INPROGRESS) { | |
279 | IWL_DEBUG_INFO(priv, "STA %d already in process of being added.\n", | |
280 | sta_id); | |
24e5c401 | 281 | return sta_id; |
4f40e4d9 TW |
282 | } |
283 | ||
fe6b23dd RC |
284 | if ((priv->stations[sta_id].used & IWL_STA_DRIVER_ACTIVE) && |
285 | (priv->stations[sta_id].used & IWL_STA_UCODE_ACTIVE) && | |
24e5c401 | 286 | !compare_ether_addr(priv->stations[sta_id].sta.sta.addr, addr)) { |
fe6b23dd RC |
287 | IWL_DEBUG_ASSOC(priv, "STA %d (%pM) already added, not adding again.\n", |
288 | sta_id, addr); | |
24e5c401 | 289 | return sta_id; |
4f40e4d9 TW |
290 | } |
291 | ||
24e5c401 EG |
292 | station = &priv->stations[sta_id]; |
293 | station->used = IWL_STA_DRIVER_ACTIVE; | |
e1623446 | 294 | IWL_DEBUG_ASSOC(priv, "Add STA to driver ID %d: %pM\n", |
e174961c | 295 | sta_id, addr); |
4f40e4d9 TW |
296 | priv->num_stations++; |
297 | ||
298 | /* Set up the REPLY_ADD_STA command to send to device */ | |
299 | memset(&station->sta, 0, sizeof(struct iwl_addsta_cmd)); | |
300 | memcpy(station->sta.sta.addr, addr, ETH_ALEN); | |
301 | station->sta.mode = 0; | |
24e5c401 | 302 | station->sta.sta.sta_id = sta_id; |
770e13bd | 303 | station->sta.station_flags = ctx->station_flags; |
dcef732c | 304 | station->ctxid = ctx->ctxid; |
4f40e4d9 | 305 | |
238d781d JB |
306 | if (sta) { |
307 | struct iwl_station_priv_common *sta_priv; | |
308 | ||
309 | sta_priv = (void *)sta->drv_priv; | |
310 | sta_priv->ctx = ctx; | |
311 | } | |
312 | ||
63d41769 JB |
313 | /* |
314 | * OK to call unconditionally, since local stations (IBSS BSSID | |
238d781d | 315 | * STA and broadcast STA) pass in a NULL sta, and mac80211 |
63d41769 JB |
316 | * doesn't allow HT IBSS. |
317 | */ | |
7e6a5886 | 318 | iwl_set_ht_add_station(priv, sta_id, sta, ctx); |
4f40e4d9 | 319 | |
fe6b23dd RC |
320 | return sta_id; |
321 | ||
322 | } | |
323 | ||
324 | #define STA_WAIT_TIMEOUT (HZ/2) | |
325 | ||
326 | /** | |
327 | * iwl_add_station_common - | |
328 | */ | |
a194e324 JB |
329 | int iwl_add_station_common(struct iwl_priv *priv, struct iwl_rxon_context *ctx, |
330 | const u8 *addr, bool is_ap, | |
238d781d | 331 | struct ieee80211_sta *sta, u8 *sta_id_r) |
fe6b23dd | 332 | { |
fe6b23dd RC |
333 | unsigned long flags_spin; |
334 | int ret = 0; | |
335 | u8 sta_id; | |
9c5ac091 | 336 | struct iwl_addsta_cmd sta_cmd; |
fe6b23dd RC |
337 | |
338 | *sta_id_r = 0; | |
339 | spin_lock_irqsave(&priv->sta_lock, flags_spin); | |
238d781d | 340 | sta_id = iwl_prep_station(priv, ctx, addr, is_ap, sta); |
fe6b23dd RC |
341 | if (sta_id == IWL_INVALID_STATION) { |
342 | IWL_ERR(priv, "Unable to prepare station %pM for addition\n", | |
343 | addr); | |
344 | spin_unlock_irqrestore(&priv->sta_lock, flags_spin); | |
345 | return -EINVAL; | |
346 | } | |
347 | ||
348 | /* | |
349 | * uCode is not able to deal with multiple requests to add a | |
350 | * station. Keep track if one is in progress so that we do not send | |
351 | * another. | |
352 | */ | |
353 | if (priv->stations[sta_id].used & IWL_STA_UCODE_INPROGRESS) { | |
354 | IWL_DEBUG_INFO(priv, "STA %d already in process of being added.\n", | |
355 | sta_id); | |
356 | spin_unlock_irqrestore(&priv->sta_lock, flags_spin); | |
357 | return -EEXIST; | |
358 | } | |
359 | ||
360 | if ((priv->stations[sta_id].used & IWL_STA_DRIVER_ACTIVE) && | |
361 | (priv->stations[sta_id].used & IWL_STA_UCODE_ACTIVE)) { | |
362 | IWL_DEBUG_ASSOC(priv, "STA %d (%pM) already added, not adding again.\n", | |
363 | sta_id, addr); | |
364 | spin_unlock_irqrestore(&priv->sta_lock, flags_spin); | |
365 | return -EEXIST; | |
366 | } | |
367 | ||
368 | priv->stations[sta_id].used |= IWL_STA_UCODE_INPROGRESS; | |
9c5ac091 | 369 | memcpy(&sta_cmd, &priv->stations[sta_id].sta, sizeof(struct iwl_addsta_cmd)); |
4f40e4d9 TW |
370 | spin_unlock_irqrestore(&priv->sta_lock, flags_spin); |
371 | ||
372 | /* Add station to device's station table */ | |
9c5ac091 | 373 | ret = iwl_send_add_sta(priv, &sta_cmd, CMD_SYNC); |
fe6b23dd | 374 | if (ret) { |
fe6b23dd | 375 | spin_lock_irqsave(&priv->sta_lock, flags_spin); |
9c5ac091 RC |
376 | IWL_ERR(priv, "Adding station %pM failed.\n", |
377 | priv->stations[sta_id].sta.sta.addr); | |
fe6b23dd RC |
378 | priv->stations[sta_id].used &= ~IWL_STA_DRIVER_ACTIVE; |
379 | priv->stations[sta_id].used &= ~IWL_STA_UCODE_INPROGRESS; | |
380 | spin_unlock_irqrestore(&priv->sta_lock, flags_spin); | |
381 | } | |
382 | *sta_id_r = sta_id; | |
383 | return ret; | |
4f40e4d9 | 384 | } |
4f40e4d9 | 385 | |
fe6b23dd RC |
386 | /** |
387 | * iwl_sta_ucode_deactivate - deactivate ucode status for a station | |
388 | * | |
389 | * priv->sta_lock must be held | |
390 | */ | |
391 | static void iwl_sta_ucode_deactivate(struct iwl_priv *priv, u8 sta_id) | |
392 | { | |
393 | /* Ucode must be active and driver must be non active */ | |
d2e210ae RC |
394 | if ((priv->stations[sta_id].used & |
395 | (IWL_STA_UCODE_ACTIVE | IWL_STA_DRIVER_ACTIVE)) != IWL_STA_UCODE_ACTIVE) | |
fe6b23dd RC |
396 | IWL_ERR(priv, "removed non active STA %u\n", sta_id); |
397 | ||
398 | priv->stations[sta_id].used &= ~IWL_STA_UCODE_ACTIVE; | |
399 | ||
400 | memset(&priv->stations[sta_id], 0, sizeof(struct iwl_station_entry)); | |
401 | IWL_DEBUG_ASSOC(priv, "Removed STA %u\n", sta_id); | |
7a999bf0 TW |
402 | } |
403 | ||
fe6b23dd | 404 | static int iwl_send_remove_station(struct iwl_priv *priv, |
2b5f7a67 JB |
405 | const u8 *addr, int sta_id, |
406 | bool temporary) | |
7a999bf0 | 407 | { |
2f301227 | 408 | struct iwl_rx_packet *pkt; |
7a999bf0 TW |
409 | int ret; |
410 | ||
fe6b23dd | 411 | unsigned long flags_spin; |
7a999bf0 TW |
412 | struct iwl_rem_sta_cmd rm_sta_cmd; |
413 | ||
414 | struct iwl_host_cmd cmd = { | |
415 | .id = REPLY_REMOVE_STA, | |
3fa50738 | 416 | .len = { sizeof(struct iwl_rem_sta_cmd), }, |
fe6b23dd | 417 | .flags = CMD_SYNC, |
3fa50738 | 418 | .data = { &rm_sta_cmd, }, |
7a999bf0 TW |
419 | }; |
420 | ||
421 | memset(&rm_sta_cmd, 0, sizeof(rm_sta_cmd)); | |
422 | rm_sta_cmd.num_sta = 1; | |
9c5ac091 | 423 | memcpy(&rm_sta_cmd.addr, addr, ETH_ALEN); |
fe6b23dd RC |
424 | |
425 | cmd.flags |= CMD_WANT_SKB; | |
7a999bf0 | 426 | |
bdfbf092 | 427 | ret = trans_send_cmd(priv, &cmd); |
7a999bf0 | 428 | |
fe6b23dd | 429 | if (ret) |
7a999bf0 TW |
430 | return ret; |
431 | ||
2f301227 ZY |
432 | pkt = (struct iwl_rx_packet *)cmd.reply_page; |
433 | if (pkt->hdr.flags & IWL_CMD_FAILED_MSK) { | |
15b1687c | 434 | IWL_ERR(priv, "Bad return from REPLY_REMOVE_STA (0x%08X)\n", |
2f301227 | 435 | pkt->hdr.flags); |
7a999bf0 TW |
436 | ret = -EIO; |
437 | } | |
438 | ||
439 | if (!ret) { | |
2f301227 | 440 | switch (pkt->u.rem_sta.status) { |
7a999bf0 | 441 | case REM_STA_SUCCESS_MSK: |
2b5f7a67 JB |
442 | if (!temporary) { |
443 | spin_lock_irqsave(&priv->sta_lock, flags_spin); | |
444 | iwl_sta_ucode_deactivate(priv, sta_id); | |
445 | spin_unlock_irqrestore(&priv->sta_lock, flags_spin); | |
446 | } | |
e1623446 | 447 | IWL_DEBUG_ASSOC(priv, "REPLY_REMOVE_STA PASSED\n"); |
7a999bf0 TW |
448 | break; |
449 | default: | |
450 | ret = -EIO; | |
15b1687c | 451 | IWL_ERR(priv, "REPLY_REMOVE_STA failed\n"); |
7a999bf0 TW |
452 | break; |
453 | } | |
454 | } | |
64a76b50 | 455 | iwl_free_pages(priv, cmd.reply_page); |
7a999bf0 TW |
456 | |
457 | return ret; | |
458 | } | |
be1f3ab6 | 459 | |
7a999bf0 TW |
460 | /** |
461 | * iwl_remove_station - Remove driver's knowledge of station. | |
7a999bf0 | 462 | */ |
fd1af15d JB |
463 | int iwl_remove_station(struct iwl_priv *priv, const u8 sta_id, |
464 | const u8 *addr) | |
7a999bf0 | 465 | { |
fd1af15d | 466 | unsigned long flags; |
fe6b23dd RC |
467 | |
468 | if (!iwl_is_ready(priv)) { | |
469 | IWL_DEBUG_INFO(priv, | |
91dd6c27 | 470 | "Unable to remove station %pM, device not ready.\n", |
c0222df8 | 471 | addr); |
fe6b23dd RC |
472 | /* |
473 | * It is typical for stations to be removed when we are | |
474 | * going down. Return success since device will be down | |
475 | * soon anyway | |
476 | */ | |
477 | return 0; | |
478 | } | |
7a999bf0 | 479 | |
fd1af15d JB |
480 | IWL_DEBUG_ASSOC(priv, "Removing STA from driver:%d %pM\n", |
481 | sta_id, addr); | |
7a999bf0 | 482 | |
fd1af15d JB |
483 | if (WARN_ON(sta_id == IWL_INVALID_STATION)) |
484 | return -EINVAL; | |
7a999bf0 | 485 | |
fd1af15d | 486 | spin_lock_irqsave(&priv->sta_lock, flags); |
24e5c401 EG |
487 | |
488 | if (!(priv->stations[sta_id].used & IWL_STA_DRIVER_ACTIVE)) { | |
fe6b23dd | 489 | IWL_DEBUG_INFO(priv, "Removing %pM but non DRIVER active\n", |
c0222df8 | 490 | addr); |
fd1af15d | 491 | goto out_err; |
24e5c401 EG |
492 | } |
493 | ||
494 | if (!(priv->stations[sta_id].used & IWL_STA_UCODE_ACTIVE)) { | |
fe6b23dd | 495 | IWL_DEBUG_INFO(priv, "Removing %pM but non UCODE active\n", |
c0222df8 | 496 | addr); |
fd1af15d | 497 | goto out_err; |
7a999bf0 TW |
498 | } |
499 | ||
1fa61b2e JB |
500 | if (priv->stations[sta_id].used & IWL_STA_LOCAL) { |
501 | kfree(priv->stations[sta_id].lq); | |
502 | priv->stations[sta_id].lq = NULL; | |
503 | } | |
24e5c401 EG |
504 | |
505 | priv->stations[sta_id].used &= ~IWL_STA_DRIVER_ACTIVE; | |
506 | ||
507 | priv->num_stations--; | |
508 | ||
3e41ace5 JB |
509 | if (WARN_ON(priv->num_stations < 0)) |
510 | priv->num_stations = 0; | |
24e5c401 | 511 | |
7a999bf0 | 512 | spin_unlock_irqrestore(&priv->sta_lock, flags); |
24e5c401 | 513 | |
2b5f7a67 | 514 | return iwl_send_remove_station(priv, addr, sta_id, false); |
fd1af15d | 515 | out_err: |
7a999bf0 | 516 | spin_unlock_irqrestore(&priv->sta_lock, flags); |
fd1af15d | 517 | return -EINVAL; |
7a999bf0 | 518 | } |
24e5c401 | 519 | |
83dde8c9 | 520 | /** |
2c810ccd JB |
521 | * iwl_clear_ucode_stations - clear ucode station table bits |
522 | * | |
523 | * This function clears all the bits in the driver indicating | |
524 | * which stations are active in the ucode. Call when something | |
525 | * other than explicit station management would cause this in | |
526 | * the ucode, e.g. unassociated RXON. | |
83dde8c9 | 527 | */ |
dcef732c JB |
528 | void iwl_clear_ucode_stations(struct iwl_priv *priv, |
529 | struct iwl_rxon_context *ctx) | |
83dde8c9 | 530 | { |
48676eb3 | 531 | int i; |
7e246191 RC |
532 | unsigned long flags_spin; |
533 | bool cleared = false; | |
534 | ||
2c810ccd | 535 | IWL_DEBUG_INFO(priv, "Clearing ucode stations in driver\n"); |
83dde8c9 | 536 | |
7e246191 | 537 | spin_lock_irqsave(&priv->sta_lock, flags_spin); |
2c810ccd | 538 | for (i = 0; i < priv->hw_params.max_stations; i++) { |
dcef732c JB |
539 | if (ctx && ctx->ctxid != priv->stations[i].ctxid) |
540 | continue; | |
541 | ||
2c810ccd JB |
542 | if (priv->stations[i].used & IWL_STA_UCODE_ACTIVE) { |
543 | IWL_DEBUG_INFO(priv, "Clearing ucode active for station %d\n", i); | |
544 | priv->stations[i].used &= ~IWL_STA_UCODE_ACTIVE; | |
545 | cleared = true; | |
7e246191 RC |
546 | } |
547 | } | |
548 | spin_unlock_irqrestore(&priv->sta_lock, flags_spin); | |
549 | ||
550 | if (!cleared) | |
551 | IWL_DEBUG_INFO(priv, "No active stations found to be cleared\n"); | |
552 | } | |
83dde8c9 | 553 | |
7e246191 RC |
554 | /** |
555 | * iwl_restore_stations() - Restore driver known stations to device | |
556 | * | |
557 | * All stations considered active by driver, but not present in ucode, is | |
558 | * restored. | |
fe6b23dd RC |
559 | * |
560 | * Function sleeps. | |
7e246191 | 561 | */ |
dcef732c | 562 | void iwl_restore_stations(struct iwl_priv *priv, struct iwl_rxon_context *ctx) |
7e246191 | 563 | { |
9c5ac091 RC |
564 | struct iwl_addsta_cmd sta_cmd; |
565 | struct iwl_link_quality_cmd lq; | |
7e246191 RC |
566 | unsigned long flags_spin; |
567 | int i; | |
568 | bool found = false; | |
fe6b23dd | 569 | int ret; |
9c5ac091 | 570 | bool send_lq; |
83dde8c9 | 571 | |
7e246191 RC |
572 | if (!iwl_is_ready(priv)) { |
573 | IWL_DEBUG_INFO(priv, "Not ready yet, not restoring any stations.\n"); | |
574 | return; | |
575 | } | |
83dde8c9 | 576 | |
7e246191 RC |
577 | IWL_DEBUG_ASSOC(priv, "Restoring all known stations ... start.\n"); |
578 | spin_lock_irqsave(&priv->sta_lock, flags_spin); | |
579 | for (i = 0; i < priv->hw_params.max_stations; i++) { | |
dcef732c JB |
580 | if (ctx->ctxid != priv->stations[i].ctxid) |
581 | continue; | |
7e246191 RC |
582 | if ((priv->stations[i].used & IWL_STA_DRIVER_ACTIVE) && |
583 | !(priv->stations[i].used & IWL_STA_UCODE_ACTIVE)) { | |
584 | IWL_DEBUG_ASSOC(priv, "Restoring sta %pM\n", | |
585 | priv->stations[i].sta.sta.addr); | |
586 | priv->stations[i].sta.mode = 0; | |
587 | priv->stations[i].used |= IWL_STA_UCODE_INPROGRESS; | |
588 | found = true; | |
589 | } | |
590 | } | |
5e46882e | 591 | |
7e246191 RC |
592 | for (i = 0; i < priv->hw_params.max_stations; i++) { |
593 | if ((priv->stations[i].used & IWL_STA_UCODE_INPROGRESS)) { | |
9c5ac091 RC |
594 | memcpy(&sta_cmd, &priv->stations[i].sta, |
595 | sizeof(struct iwl_addsta_cmd)); | |
596 | send_lq = false; | |
597 | if (priv->stations[i].lq) { | |
598 | memcpy(&lq, priv->stations[i].lq, | |
599 | sizeof(struct iwl_link_quality_cmd)); | |
600 | send_lq = true; | |
601 | } | |
fe6b23dd | 602 | spin_unlock_irqrestore(&priv->sta_lock, flags_spin); |
9c5ac091 | 603 | ret = iwl_send_add_sta(priv, &sta_cmd, CMD_SYNC); |
fe6b23dd | 604 | if (ret) { |
fe6b23dd | 605 | spin_lock_irqsave(&priv->sta_lock, flags_spin); |
9c5ac091 RC |
606 | IWL_ERR(priv, "Adding station %pM failed.\n", |
607 | priv->stations[i].sta.sta.addr); | |
fe6b23dd RC |
608 | priv->stations[i].used &= ~IWL_STA_DRIVER_ACTIVE; |
609 | priv->stations[i].used &= ~IWL_STA_UCODE_INPROGRESS; | |
610 | spin_unlock_irqrestore(&priv->sta_lock, flags_spin); | |
611 | } | |
612 | /* | |
613 | * Rate scaling has already been initialized, send | |
614 | * current LQ command | |
615 | */ | |
9c5ac091 | 616 | if (send_lq) |
7e6a5886 | 617 | iwl_send_lq_cmd(priv, ctx, &lq, CMD_SYNC, true); |
fe6b23dd | 618 | spin_lock_irqsave(&priv->sta_lock, flags_spin); |
7e246191 RC |
619 | priv->stations[i].used &= ~IWL_STA_UCODE_INPROGRESS; |
620 | } | |
48676eb3 MA |
621 | } |
622 | ||
7e246191 RC |
623 | spin_unlock_irqrestore(&priv->sta_lock, flags_spin); |
624 | if (!found) | |
625 | IWL_DEBUG_INFO(priv, "Restoring all known stations .... no stations to be restored.\n"); | |
626 | else | |
fe6b23dd | 627 | IWL_DEBUG_INFO(priv, "Restoring all known stations .... complete.\n"); |
83dde8c9 | 628 | } |
83dde8c9 | 629 | |
2b5f7a67 JB |
630 | void iwl_reprogram_ap_sta(struct iwl_priv *priv, struct iwl_rxon_context *ctx) |
631 | { | |
632 | unsigned long flags; | |
633 | int sta_id = ctx->ap_sta_id; | |
634 | int ret; | |
635 | struct iwl_addsta_cmd sta_cmd; | |
636 | struct iwl_link_quality_cmd lq; | |
637 | bool active; | |
638 | ||
639 | spin_lock_irqsave(&priv->sta_lock, flags); | |
640 | if (!(priv->stations[sta_id].used & IWL_STA_DRIVER_ACTIVE)) { | |
641 | spin_unlock_irqrestore(&priv->sta_lock, flags); | |
642 | return; | |
643 | } | |
644 | ||
645 | memcpy(&sta_cmd, &priv->stations[sta_id].sta, sizeof(sta_cmd)); | |
646 | sta_cmd.mode = 0; | |
647 | memcpy(&lq, priv->stations[sta_id].lq, sizeof(lq)); | |
648 | ||
649 | active = priv->stations[sta_id].used & IWL_STA_UCODE_ACTIVE; | |
40b97c2f | 650 | priv->stations[sta_id].used &= ~IWL_STA_DRIVER_ACTIVE; |
2b5f7a67 JB |
651 | spin_unlock_irqrestore(&priv->sta_lock, flags); |
652 | ||
653 | if (active) { | |
654 | ret = iwl_send_remove_station( | |
655 | priv, priv->stations[sta_id].sta.sta.addr, | |
656 | sta_id, true); | |
657 | if (ret) | |
658 | IWL_ERR(priv, "failed to remove STA %pM (%d)\n", | |
659 | priv->stations[sta_id].sta.sta.addr, ret); | |
660 | } | |
40b97c2f WYG |
661 | spin_lock_irqsave(&priv->sta_lock, flags); |
662 | priv->stations[sta_id].used |= IWL_STA_DRIVER_ACTIVE; | |
663 | spin_unlock_irqrestore(&priv->sta_lock, flags); | |
664 | ||
2b5f7a67 JB |
665 | ret = iwl_send_add_sta(priv, &sta_cmd, CMD_SYNC); |
666 | if (ret) | |
667 | IWL_ERR(priv, "failed to re-add STA %pM (%d)\n", | |
668 | priv->stations[sta_id].sta.sta.addr, ret); | |
669 | iwl_send_lq_cmd(priv, ctx, &lq, CMD_SYNC, true); | |
670 | } | |
2b5f7a67 | 671 | |
6e21f15c | 672 | int iwl_get_free_ucode_key_index(struct iwl_priv *priv) |
80fb47a1 EG |
673 | { |
674 | int i; | |
675 | ||
c10afb6e | 676 | for (i = 0; i < priv->sta_key_max_num; i++) |
77bab602 | 677 | if (!test_and_set_bit(i, &priv->ucode_key_table)) |
80fb47a1 EG |
678 | return i; |
679 | ||
40a9a829 | 680 | return WEP_INVALID_OFFSET; |
80fb47a1 | 681 | } |
6974e363 | 682 | |
a30e3112 | 683 | void iwl_dealloc_bcast_stations(struct iwl_priv *priv) |
9f58671e | 684 | { |
9f58671e | 685 | unsigned long flags; |
9f58671e | 686 | int i; |
9f58671e | 687 | |
7480513f | 688 | spin_lock_irqsave(&priv->sta_lock, flags); |
a30e3112 JB |
689 | for (i = 0; i < priv->hw_params.max_stations; i++) { |
690 | if (!(priv->stations[i].used & IWL_STA_BCAST)) | |
691 | continue; | |
40a9a829 | 692 | |
a30e3112 JB |
693 | priv->stations[i].used &= ~IWL_STA_UCODE_ACTIVE; |
694 | priv->num_stations--; | |
3e41ace5 JB |
695 | if (WARN_ON(priv->num_stations < 0)) |
696 | priv->num_stations = 0; | |
a30e3112 JB |
697 | kfree(priv->stations[i].lq); |
698 | priv->stations[i].lq = NULL; | |
2d1bb9e5 | 699 | } |
3ec47732 | 700 | spin_unlock_irqrestore(&priv->sta_lock, flags); |
7480513f EG |
701 | } |
702 | ||
66c73db7 TW |
703 | #ifdef CONFIG_IWLWIFI_DEBUG |
704 | static void iwl_dump_lq_cmd(struct iwl_priv *priv, | |
705 | struct iwl_link_quality_cmd *lq) | |
706 | { | |
707 | int i; | |
e1623446 TW |
708 | IWL_DEBUG_RATE(priv, "lq station id 0x%x\n", lq->sta_id); |
709 | IWL_DEBUG_RATE(priv, "lq ant 0x%X 0x%X\n", | |
66c73db7 TW |
710 | lq->general_params.single_stream_ant_msk, |
711 | lq->general_params.dual_stream_ant_msk); | |
712 | ||
713 | for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++) | |
e1623446 | 714 | IWL_DEBUG_RATE(priv, "lq index %d 0x%X\n", |
66c73db7 TW |
715 | i, lq->rs_table[i].rate_n_flags); |
716 | } | |
717 | #else | |
718 | static inline void iwl_dump_lq_cmd(struct iwl_priv *priv, | |
719 | struct iwl_link_quality_cmd *lq) | |
720 | { | |
721 | } | |
722 | #endif | |
723 | ||
3bce6066 RC |
724 | /** |
725 | * is_lq_table_valid() - Test one aspect of LQ cmd for validity | |
726 | * | |
727 | * It sometimes happens when a HT rate has been in use and we | |
728 | * loose connectivity with AP then mac80211 will first tell us that the | |
729 | * current channel is not HT anymore before removing the station. In such a | |
730 | * scenario the RXON flags will be updated to indicate we are not | |
731 | * communicating HT anymore, but the LQ command may still contain HT rates. | |
732 | * Test for this to prevent driver from sending LQ command between the time | |
733 | * RXON flags are updated and when LQ command is updated. | |
734 | */ | |
735 | static bool is_lq_table_valid(struct iwl_priv *priv, | |
7e6a5886 | 736 | struct iwl_rxon_context *ctx, |
3bce6066 RC |
737 | struct iwl_link_quality_cmd *lq) |
738 | { | |
739 | int i; | |
3bce6066 | 740 | |
7e6a5886 | 741 | if (ctx->ht.enabled) |
3bce6066 RC |
742 | return true; |
743 | ||
744 | IWL_DEBUG_INFO(priv, "Channel %u is not an HT channel\n", | |
246ed355 | 745 | ctx->active.channel); |
3bce6066 RC |
746 | for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++) { |
747 | if (le32_to_cpu(lq->rs_table[i].rate_n_flags) & RATE_MCS_HT_MSK) { | |
748 | IWL_DEBUG_INFO(priv, | |
749 | "index %d of LQ expects HT channel\n", | |
750 | i); | |
751 | return false; | |
752 | } | |
753 | } | |
754 | return true; | |
755 | } | |
756 | ||
fe6b23dd RC |
757 | /** |
758 | * iwl_send_lq_cmd() - Send link quality command | |
759 | * @init: This command is sent as part of station initialization right | |
760 | * after station has been added. | |
761 | * | |
762 | * The link quality command is sent as the last step of station creation. | |
763 | * This is the special case in which init is set and we call a callback in | |
764 | * this case to clear the state indicating that station creation is in | |
765 | * progress. | |
766 | */ | |
7e6a5886 | 767 | int iwl_send_lq_cmd(struct iwl_priv *priv, struct iwl_rxon_context *ctx, |
fe6b23dd | 768 | struct iwl_link_quality_cmd *lq, u8 flags, bool init) |
66c73db7 | 769 | { |
fe6b23dd RC |
770 | int ret = 0; |
771 | unsigned long flags_spin; | |
772 | ||
66c73db7 TW |
773 | struct iwl_host_cmd cmd = { |
774 | .id = REPLY_TX_LINK_QUALITY_CMD, | |
3fa50738 | 775 | .len = { sizeof(struct iwl_link_quality_cmd), }, |
c2acea8e | 776 | .flags = flags, |
3fa50738 | 777 | .data = { lq, }, |
66c73db7 TW |
778 | }; |
779 | ||
76c3c698 | 780 | if (WARN_ON(lq->sta_id == IWL_INVALID_STATION)) |
66c73db7 TW |
781 | return -EINVAL; |
782 | ||
40b97c2f WYG |
783 | |
784 | spin_lock_irqsave(&priv->sta_lock, flags_spin); | |
785 | if (!(priv->stations[lq->sta_id].used & IWL_STA_DRIVER_ACTIVE)) { | |
786 | spin_unlock_irqrestore(&priv->sta_lock, flags_spin); | |
787 | return -EINVAL; | |
788 | } | |
789 | spin_unlock_irqrestore(&priv->sta_lock, flags_spin); | |
790 | ||
3ac7f146 | 791 | iwl_dump_lq_cmd(priv, lq); |
3e41ace5 JB |
792 | if (WARN_ON(init && (cmd.flags & CMD_ASYNC))) |
793 | return -EINVAL; | |
66c73db7 | 794 | |
7e6a5886 | 795 | if (is_lq_table_valid(priv, ctx, lq)) |
bdfbf092 | 796 | ret = trans_send_cmd(priv, &cmd); |
3bce6066 RC |
797 | else |
798 | ret = -EINVAL; | |
d2e210ae RC |
799 | |
800 | if (cmd.flags & CMD_ASYNC) | |
fe6b23dd | 801 | return ret; |
66c73db7 | 802 | |
fe6b23dd | 803 | if (init) { |
91dd6c27 | 804 | IWL_DEBUG_INFO(priv, "init LQ command complete, clearing sta addition status for sta %d\n", |
fe6b23dd RC |
805 | lq->sta_id); |
806 | spin_lock_irqsave(&priv->sta_lock, flags_spin); | |
807 | priv->stations[lq->sta_id].used &= ~IWL_STA_UCODE_INPROGRESS; | |
808 | spin_unlock_irqrestore(&priv->sta_lock, flags_spin); | |
809 | } | |
d2e210ae | 810 | return ret; |
66c73db7 | 811 | } |
66c73db7 | 812 | |
fe6b23dd | 813 | int iwl_mac_sta_remove(struct ieee80211_hw *hw, |
fd1af15d JB |
814 | struct ieee80211_vif *vif, |
815 | struct ieee80211_sta *sta) | |
fe6b23dd | 816 | { |
fe6b23dd | 817 | struct iwl_priv *priv = hw->priv; |
fd1af15d JB |
818 | struct iwl_station_priv_common *sta_common = (void *)sta->drv_priv; |
819 | int ret; | |
820 | ||
fe6b23dd RC |
821 | IWL_DEBUG_INFO(priv, "received request to remove station %pM\n", |
822 | sta->addr); | |
da5ae1cf RC |
823 | mutex_lock(&priv->mutex); |
824 | IWL_DEBUG_INFO(priv, "proceeding to remove station %pM\n", | |
825 | sta->addr); | |
fd1af15d | 826 | ret = iwl_remove_station(priv, sta_common->sta_id, sta->addr); |
fe6b23dd RC |
827 | if (ret) |
828 | IWL_ERR(priv, "Error removing station %pM\n", | |
829 | sta->addr); | |
da5ae1cf | 830 | mutex_unlock(&priv->mutex); |
fe6b23dd RC |
831 | return ret; |
832 | } |