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a30e3112 JB |
1 | /****************************************************************************** |
2 | * | |
fb4961db | 3 | * Copyright(c) 2003 - 2012 Intel Corporation. All rights reserved. |
a30e3112 JB |
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: | |
25 | * Intel Linux Wireless <ilw@linux.intel.com> | |
26 | * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 | |
27 | * | |
28 | *****************************************************************************/ | |
29 | ||
30 | #include <net/mac80211.h> | |
31 | ||
32 | #include "iwl-dev.h" | |
33 | #include "iwl-core.h" | |
a30e3112 | 34 | #include "iwl-agn.h" |
bdfbf092 | 35 | #include "iwl-trans.h" |
a30e3112 | 36 | |
2da424b0 | 37 | static int iwl_sta_ucode_activate(struct iwl_priv *priv, u8 sta_id) |
c745f55b | 38 | { |
fa23cb04 JB |
39 | lockdep_assert_held(&priv->sta_lock); |
40 | ||
2da424b0 WYG |
41 | if (sta_id >= IWLAGN_STATION_COUNT) { |
42 | IWL_ERR(priv, "invalid sta_id %u", sta_id); | |
43 | return -EINVAL; | |
44 | } | |
c745f55b WYG |
45 | if (!(priv->stations[sta_id].used & IWL_STA_DRIVER_ACTIVE)) |
46 | IWL_ERR(priv, "ACTIVATE a non DRIVER active station id %u " | |
47 | "addr %pM\n", | |
48 | sta_id, priv->stations[sta_id].sta.sta.addr); | |
49 | ||
50 | if (priv->stations[sta_id].used & IWL_STA_UCODE_ACTIVE) { | |
51 | IWL_DEBUG_ASSOC(priv, | |
52 | "STA id %u addr %pM already present in uCode " | |
53 | "(according to driver)\n", | |
54 | sta_id, priv->stations[sta_id].sta.sta.addr); | |
55 | } else { | |
56 | priv->stations[sta_id].used |= IWL_STA_UCODE_ACTIVE; | |
57 | IWL_DEBUG_ASSOC(priv, "Added STA id %u addr %pM to uCode\n", | |
58 | sta_id, priv->stations[sta_id].sta.sta.addr); | |
59 | } | |
2da424b0 | 60 | return 0; |
c745f55b WYG |
61 | } |
62 | ||
63 | static int iwl_process_add_sta_resp(struct iwl_priv *priv, | |
64 | struct iwl_addsta_cmd *addsta, | |
65 | struct iwl_rx_packet *pkt) | |
66 | { | |
67 | u8 sta_id = addsta->sta.sta_id; | |
c745f55b WYG |
68 | int ret = -EIO; |
69 | ||
70 | if (pkt->hdr.flags & IWL_CMD_FAILED_MSK) { | |
71 | IWL_ERR(priv, "Bad return from REPLY_ADD_STA (0x%08X)\n", | |
72 | pkt->hdr.flags); | |
73 | return ret; | |
74 | } | |
75 | ||
76 | IWL_DEBUG_INFO(priv, "Processing response for adding station %u\n", | |
77 | sta_id); | |
78 | ||
fa23cb04 | 79 | spin_lock(&priv->sta_lock); |
c745f55b WYG |
80 | |
81 | switch (pkt->u.add_sta.status) { | |
82 | case ADD_STA_SUCCESS_MSK: | |
83 | IWL_DEBUG_INFO(priv, "REPLY_ADD_STA PASSED\n"); | |
2da424b0 | 84 | ret = iwl_sta_ucode_activate(priv, sta_id); |
c745f55b WYG |
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 " | |
92 | "resource.\n", sta_id); | |
93 | break; | |
94 | case ADD_STA_MODIFY_NON_EXIST_STA: | |
95 | IWL_ERR(priv, "Attempting to modify non-existing station %d\n", | |
96 | sta_id); | |
97 | break; | |
98 | default: | |
99 | IWL_DEBUG_ASSOC(priv, "Received REPLY_ADD_STA:(0x%08X)\n", | |
100 | pkt->u.add_sta.status); | |
101 | break; | |
102 | } | |
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 | |
112 | * written to the command buffer often is not the same MAC address | |
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); | |
fa23cb04 | 121 | spin_unlock(&priv->sta_lock); |
c745f55b WYG |
122 | |
123 | return ret; | |
124 | } | |
125 | ||
126 | int iwl_add_sta_callback(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb, | |
127 | struct iwl_device_cmd *cmd) | |
128 | { | |
129 | struct iwl_rx_packet *pkt = rxb_addr(rxb); | |
130 | struct iwl_addsta_cmd *addsta = | |
131 | (struct iwl_addsta_cmd *) cmd->payload; | |
132 | ||
133 | return iwl_process_add_sta_resp(priv, addsta, pkt); | |
134 | } | |
135 | ||
c745f55b WYG |
136 | int iwl_send_add_sta(struct iwl_priv *priv, |
137 | struct iwl_addsta_cmd *sta, u8 flags) | |
138 | { | |
139 | int ret = 0; | |
c745f55b WYG |
140 | struct iwl_host_cmd cmd = { |
141 | .id = REPLY_ADD_STA, | |
142 | .flags = flags, | |
69b172f7 JB |
143 | .data = { sta, }, |
144 | .len = { sizeof(*sta), }, | |
c745f55b WYG |
145 | }; |
146 | u8 sta_id __maybe_unused = sta->sta.sta_id; | |
147 | ||
148 | IWL_DEBUG_INFO(priv, "Adding sta %u (%pM) %ssynchronously\n", | |
149 | sta_id, sta->sta.addr, flags & CMD_ASYNC ? "a" : ""); | |
150 | ||
151 | if (!(flags & CMD_ASYNC)) { | |
152 | cmd.flags |= CMD_WANT_SKB; | |
153 | might_sleep(); | |
154 | } | |
155 | ||
c745f55b WYG |
156 | ret = iwl_trans_send_cmd(trans(priv), &cmd); |
157 | ||
158 | if (ret || (flags & CMD_ASYNC)) | |
159 | return ret; | |
160 | /*else the command was successfully sent in SYNC mode, need to free | |
161 | * the reply page */ | |
162 | ||
163 | iwl_free_pages(priv->shrd, cmd.reply_page); | |
164 | ||
165 | if (cmd.handler_status) | |
166 | IWL_ERR(priv, "%s - error in the CMD response %d", __func__, | |
167 | cmd.handler_status); | |
168 | ||
169 | return cmd.handler_status; | |
170 | } | |
171 | ||
172 | static void iwl_set_ht_add_station(struct iwl_priv *priv, u8 index, | |
173 | struct ieee80211_sta *sta, | |
174 | struct iwl_rxon_context *ctx) | |
175 | { | |
176 | struct ieee80211_sta_ht_cap *sta_ht_inf = &sta->ht_cap; | |
177 | __le32 sta_flags; | |
178 | u8 mimo_ps_mode; | |
179 | ||
180 | if (!sta || !sta_ht_inf->ht_supported) | |
181 | goto done; | |
182 | ||
183 | mimo_ps_mode = (sta_ht_inf->cap & IEEE80211_HT_CAP_SM_PS) >> 2; | |
184 | IWL_DEBUG_ASSOC(priv, "spatial multiplexing power save mode: %s\n", | |
185 | (mimo_ps_mode == WLAN_HT_CAP_SM_PS_STATIC) ? | |
186 | "static" : | |
187 | (mimo_ps_mode == WLAN_HT_CAP_SM_PS_DYNAMIC) ? | |
188 | "dynamic" : "disabled"); | |
189 | ||
190 | sta_flags = priv->stations[index].sta.station_flags; | |
191 | ||
192 | sta_flags &= ~(STA_FLG_RTS_MIMO_PROT_MSK | STA_FLG_MIMO_DIS_MSK); | |
193 | ||
194 | switch (mimo_ps_mode) { | |
195 | case WLAN_HT_CAP_SM_PS_STATIC: | |
196 | sta_flags |= STA_FLG_MIMO_DIS_MSK; | |
197 | break; | |
198 | case WLAN_HT_CAP_SM_PS_DYNAMIC: | |
199 | sta_flags |= STA_FLG_RTS_MIMO_PROT_MSK; | |
200 | break; | |
201 | case WLAN_HT_CAP_SM_PS_DISABLED: | |
202 | break; | |
203 | default: | |
204 | IWL_WARN(priv, "Invalid MIMO PS mode %d\n", mimo_ps_mode); | |
205 | break; | |
206 | } | |
207 | ||
208 | sta_flags |= cpu_to_le32( | |
209 | (u32)sta_ht_inf->ampdu_factor << STA_FLG_MAX_AGG_SIZE_POS); | |
210 | ||
211 | sta_flags |= cpu_to_le32( | |
212 | (u32)sta_ht_inf->ampdu_density << STA_FLG_AGG_MPDU_DENSITY_POS); | |
213 | ||
214 | if (iwl_is_ht40_tx_allowed(priv, ctx, &sta->ht_cap)) | |
215 | sta_flags |= STA_FLG_HT40_EN_MSK; | |
216 | else | |
217 | sta_flags &= ~STA_FLG_HT40_EN_MSK; | |
218 | ||
219 | priv->stations[index].sta.station_flags = sta_flags; | |
220 | done: | |
221 | return; | |
222 | } | |
223 | ||
224 | /** | |
225 | * iwl_prep_station - Prepare station information for addition | |
226 | * | |
227 | * should be called with sta_lock held | |
228 | */ | |
229 | u8 iwl_prep_station(struct iwl_priv *priv, struct iwl_rxon_context *ctx, | |
230 | const u8 *addr, bool is_ap, struct ieee80211_sta *sta) | |
231 | { | |
232 | struct iwl_station_entry *station; | |
233 | int i; | |
234 | u8 sta_id = IWL_INVALID_STATION; | |
235 | ||
236 | if (is_ap) | |
237 | sta_id = ctx->ap_sta_id; | |
238 | else if (is_broadcast_ether_addr(addr)) | |
239 | sta_id = ctx->bcast_sta_id; | |
240 | else | |
241 | for (i = IWL_STA_ID; i < IWLAGN_STATION_COUNT; i++) { | |
242 | if (!compare_ether_addr(priv->stations[i].sta.sta.addr, | |
243 | addr)) { | |
244 | sta_id = i; | |
245 | break; | |
246 | } | |
247 | ||
248 | if (!priv->stations[i].used && | |
249 | sta_id == IWL_INVALID_STATION) | |
250 | sta_id = i; | |
251 | } | |
252 | ||
253 | /* | |
254 | * These two conditions have the same outcome, but keep them | |
255 | * separate | |
256 | */ | |
257 | if (unlikely(sta_id == IWL_INVALID_STATION)) | |
258 | return sta_id; | |
259 | ||
260 | /* | |
261 | * uCode is not able to deal with multiple requests to add a | |
262 | * station. Keep track if one is in progress so that we do not send | |
263 | * another. | |
264 | */ | |
265 | if (priv->stations[sta_id].used & IWL_STA_UCODE_INPROGRESS) { | |
266 | IWL_DEBUG_INFO(priv, "STA %d already in process of being " | |
267 | "added.\n", sta_id); | |
268 | return sta_id; | |
269 | } | |
270 | ||
271 | if ((priv->stations[sta_id].used & IWL_STA_DRIVER_ACTIVE) && | |
272 | (priv->stations[sta_id].used & IWL_STA_UCODE_ACTIVE) && | |
273 | !compare_ether_addr(priv->stations[sta_id].sta.sta.addr, addr)) { | |
274 | IWL_DEBUG_ASSOC(priv, "STA %d (%pM) already added, not " | |
275 | "adding again.\n", sta_id, addr); | |
276 | return sta_id; | |
277 | } | |
278 | ||
279 | station = &priv->stations[sta_id]; | |
280 | station->used = IWL_STA_DRIVER_ACTIVE; | |
281 | IWL_DEBUG_ASSOC(priv, "Add STA to driver ID %d: %pM\n", | |
282 | sta_id, addr); | |
283 | priv->num_stations++; | |
284 | ||
285 | /* Set up the REPLY_ADD_STA command to send to device */ | |
286 | memset(&station->sta, 0, sizeof(struct iwl_addsta_cmd)); | |
287 | memcpy(station->sta.sta.addr, addr, ETH_ALEN); | |
288 | station->sta.mode = 0; | |
289 | station->sta.sta.sta_id = sta_id; | |
290 | station->sta.station_flags = ctx->station_flags; | |
291 | station->ctxid = ctx->ctxid; | |
292 | ||
293 | if (sta) { | |
294 | struct iwl_station_priv *sta_priv; | |
295 | ||
296 | sta_priv = (void *)sta->drv_priv; | |
297 | sta_priv->ctx = ctx; | |
298 | } | |
299 | ||
300 | /* | |
301 | * OK to call unconditionally, since local stations (IBSS BSSID | |
302 | * STA and broadcast STA) pass in a NULL sta, and mac80211 | |
303 | * doesn't allow HT IBSS. | |
304 | */ | |
305 | iwl_set_ht_add_station(priv, sta_id, sta, ctx); | |
306 | ||
307 | return sta_id; | |
308 | ||
309 | } | |
310 | ||
311 | #define STA_WAIT_TIMEOUT (HZ/2) | |
312 | ||
313 | /** | |
314 | * iwl_add_station_common - | |
315 | */ | |
316 | int iwl_add_station_common(struct iwl_priv *priv, struct iwl_rxon_context *ctx, | |
317 | const u8 *addr, bool is_ap, | |
318 | struct ieee80211_sta *sta, u8 *sta_id_r) | |
319 | { | |
c745f55b WYG |
320 | int ret = 0; |
321 | u8 sta_id; | |
322 | struct iwl_addsta_cmd sta_cmd; | |
323 | ||
324 | *sta_id_r = 0; | |
fa23cb04 | 325 | spin_lock_bh(&priv->sta_lock); |
c745f55b WYG |
326 | sta_id = iwl_prep_station(priv, ctx, addr, is_ap, sta); |
327 | if (sta_id == IWL_INVALID_STATION) { | |
328 | IWL_ERR(priv, "Unable to prepare station %pM for addition\n", | |
329 | addr); | |
fa23cb04 | 330 | spin_unlock_bh(&priv->sta_lock); |
c745f55b WYG |
331 | return -EINVAL; |
332 | } | |
333 | ||
334 | /* | |
335 | * uCode is not able to deal with multiple requests to add a | |
336 | * station. Keep track if one is in progress so that we do not send | |
337 | * another. | |
338 | */ | |
339 | if (priv->stations[sta_id].used & IWL_STA_UCODE_INPROGRESS) { | |
340 | IWL_DEBUG_INFO(priv, "STA %d already in process of being " | |
341 | "added.\n", sta_id); | |
fa23cb04 | 342 | spin_unlock_bh(&priv->sta_lock); |
c745f55b WYG |
343 | return -EEXIST; |
344 | } | |
345 | ||
346 | if ((priv->stations[sta_id].used & IWL_STA_DRIVER_ACTIVE) && | |
347 | (priv->stations[sta_id].used & IWL_STA_UCODE_ACTIVE)) { | |
348 | IWL_DEBUG_ASSOC(priv, "STA %d (%pM) already added, not " | |
349 | "adding again.\n", sta_id, addr); | |
fa23cb04 | 350 | spin_unlock_bh(&priv->sta_lock); |
c745f55b WYG |
351 | return -EEXIST; |
352 | } | |
353 | ||
354 | priv->stations[sta_id].used |= IWL_STA_UCODE_INPROGRESS; | |
355 | memcpy(&sta_cmd, &priv->stations[sta_id].sta, | |
356 | sizeof(struct iwl_addsta_cmd)); | |
fa23cb04 | 357 | spin_unlock_bh(&priv->sta_lock); |
c745f55b WYG |
358 | |
359 | /* Add station to device's station table */ | |
360 | ret = iwl_send_add_sta(priv, &sta_cmd, CMD_SYNC); | |
361 | if (ret) { | |
fa23cb04 | 362 | spin_lock_bh(&priv->sta_lock); |
c745f55b WYG |
363 | IWL_ERR(priv, "Adding station %pM failed.\n", |
364 | priv->stations[sta_id].sta.sta.addr); | |
365 | priv->stations[sta_id].used &= ~IWL_STA_DRIVER_ACTIVE; | |
366 | priv->stations[sta_id].used &= ~IWL_STA_UCODE_INPROGRESS; | |
fa23cb04 | 367 | spin_unlock_bh(&priv->sta_lock); |
c745f55b WYG |
368 | } |
369 | *sta_id_r = sta_id; | |
370 | return ret; | |
371 | } | |
372 | ||
373 | /** | |
374 | * iwl_sta_ucode_deactivate - deactivate ucode status for a station | |
c745f55b WYG |
375 | */ |
376 | static void iwl_sta_ucode_deactivate(struct iwl_priv *priv, u8 sta_id) | |
377 | { | |
fa23cb04 JB |
378 | lockdep_assert_held(&priv->sta_lock); |
379 | ||
c745f55b WYG |
380 | /* Ucode must be active and driver must be non active */ |
381 | if ((priv->stations[sta_id].used & | |
382 | (IWL_STA_UCODE_ACTIVE | IWL_STA_DRIVER_ACTIVE)) != | |
383 | IWL_STA_UCODE_ACTIVE) | |
384 | IWL_ERR(priv, "removed non active STA %u\n", sta_id); | |
385 | ||
386 | priv->stations[sta_id].used &= ~IWL_STA_UCODE_ACTIVE; | |
387 | ||
388 | memset(&priv->stations[sta_id], 0, sizeof(struct iwl_station_entry)); | |
389 | IWL_DEBUG_ASSOC(priv, "Removed STA %u\n", sta_id); | |
390 | } | |
391 | ||
392 | static int iwl_send_remove_station(struct iwl_priv *priv, | |
393 | const u8 *addr, int sta_id, | |
394 | bool temporary) | |
395 | { | |
396 | struct iwl_rx_packet *pkt; | |
397 | int ret; | |
c745f55b WYG |
398 | struct iwl_rem_sta_cmd rm_sta_cmd; |
399 | ||
400 | struct iwl_host_cmd cmd = { | |
401 | .id = REPLY_REMOVE_STA, | |
402 | .len = { sizeof(struct iwl_rem_sta_cmd), }, | |
403 | .flags = CMD_SYNC, | |
404 | .data = { &rm_sta_cmd, }, | |
405 | }; | |
406 | ||
407 | memset(&rm_sta_cmd, 0, sizeof(rm_sta_cmd)); | |
408 | rm_sta_cmd.num_sta = 1; | |
409 | memcpy(&rm_sta_cmd.addr, addr, ETH_ALEN); | |
410 | ||
411 | cmd.flags |= CMD_WANT_SKB; | |
412 | ||
413 | ret = iwl_trans_send_cmd(trans(priv), &cmd); | |
414 | ||
415 | if (ret) | |
416 | return ret; | |
417 | ||
418 | pkt = (struct iwl_rx_packet *)cmd.reply_page; | |
419 | if (pkt->hdr.flags & IWL_CMD_FAILED_MSK) { | |
420 | IWL_ERR(priv, "Bad return from REPLY_REMOVE_STA (0x%08X)\n", | |
421 | pkt->hdr.flags); | |
422 | ret = -EIO; | |
423 | } | |
424 | ||
425 | if (!ret) { | |
426 | switch (pkt->u.rem_sta.status) { | |
427 | case REM_STA_SUCCESS_MSK: | |
428 | if (!temporary) { | |
fa23cb04 | 429 | spin_lock_bh(&priv->sta_lock); |
c745f55b | 430 | iwl_sta_ucode_deactivate(priv, sta_id); |
fa23cb04 | 431 | spin_unlock_bh(&priv->sta_lock); |
c745f55b WYG |
432 | } |
433 | IWL_DEBUG_ASSOC(priv, "REPLY_REMOVE_STA PASSED\n"); | |
434 | break; | |
435 | default: | |
436 | ret = -EIO; | |
437 | IWL_ERR(priv, "REPLY_REMOVE_STA failed\n"); | |
438 | break; | |
439 | } | |
440 | } | |
441 | iwl_free_pages(priv->shrd, cmd.reply_page); | |
442 | ||
443 | return ret; | |
444 | } | |
445 | ||
446 | /** | |
447 | * iwl_remove_station - Remove driver's knowledge of station. | |
448 | */ | |
449 | int iwl_remove_station(struct iwl_priv *priv, const u8 sta_id, | |
450 | const u8 *addr) | |
451 | { | |
855c2ee8 | 452 | u8 tid; |
c745f55b WYG |
453 | |
454 | if (!iwl_is_ready(priv->shrd)) { | |
455 | IWL_DEBUG_INFO(priv, | |
456 | "Unable to remove station %pM, device not ready.\n", | |
457 | addr); | |
458 | /* | |
459 | * It is typical for stations to be removed when we are | |
460 | * going down. Return success since device will be down | |
461 | * soon anyway | |
462 | */ | |
463 | return 0; | |
464 | } | |
465 | ||
466 | IWL_DEBUG_ASSOC(priv, "Removing STA from driver:%d %pM\n", | |
467 | sta_id, addr); | |
468 | ||
469 | if (WARN_ON(sta_id == IWL_INVALID_STATION)) | |
470 | return -EINVAL; | |
471 | ||
fa23cb04 | 472 | spin_lock_bh(&priv->sta_lock); |
c745f55b WYG |
473 | |
474 | if (!(priv->stations[sta_id].used & IWL_STA_DRIVER_ACTIVE)) { | |
475 | IWL_DEBUG_INFO(priv, "Removing %pM but non DRIVER active\n", | |
476 | addr); | |
477 | goto out_err; | |
478 | } | |
479 | ||
480 | if (!(priv->stations[sta_id].used & IWL_STA_UCODE_ACTIVE)) { | |
481 | IWL_DEBUG_INFO(priv, "Removing %pM but non UCODE active\n", | |
482 | addr); | |
483 | goto out_err; | |
484 | } | |
485 | ||
486 | if (priv->stations[sta_id].used & IWL_STA_LOCAL) { | |
487 | kfree(priv->stations[sta_id].lq); | |
488 | priv->stations[sta_id].lq = NULL; | |
489 | } | |
490 | ||
855c2ee8 EG |
491 | for (tid = 0; tid < IWL_MAX_TID_COUNT; tid++) |
492 | memset(&priv->tid_data[sta_id][tid], 0, | |
493 | sizeof(priv->tid_data[sta_id][tid])); | |
494 | ||
c745f55b WYG |
495 | priv->stations[sta_id].used &= ~IWL_STA_DRIVER_ACTIVE; |
496 | ||
497 | priv->num_stations--; | |
498 | ||
499 | if (WARN_ON(priv->num_stations < 0)) | |
500 | priv->num_stations = 0; | |
501 | ||
fa23cb04 | 502 | spin_unlock_bh(&priv->sta_lock); |
c745f55b WYG |
503 | |
504 | return iwl_send_remove_station(priv, addr, sta_id, false); | |
505 | out_err: | |
fa23cb04 | 506 | spin_unlock_bh(&priv->sta_lock); |
c745f55b WYG |
507 | return -EINVAL; |
508 | } | |
509 | ||
510 | /** | |
511 | * iwl_clear_ucode_stations - clear ucode station table bits | |
512 | * | |
513 | * This function clears all the bits in the driver indicating | |
514 | * which stations are active in the ucode. Call when something | |
515 | * other than explicit station management would cause this in | |
516 | * the ucode, e.g. unassociated RXON. | |
517 | */ | |
518 | void iwl_clear_ucode_stations(struct iwl_priv *priv, | |
519 | struct iwl_rxon_context *ctx) | |
520 | { | |
521 | int i; | |
c745f55b WYG |
522 | bool cleared = false; |
523 | ||
524 | IWL_DEBUG_INFO(priv, "Clearing ucode stations in driver\n"); | |
525 | ||
fa23cb04 | 526 | spin_lock_bh(&priv->sta_lock); |
c745f55b WYG |
527 | for (i = 0; i < IWLAGN_STATION_COUNT; i++) { |
528 | if (ctx && ctx->ctxid != priv->stations[i].ctxid) | |
529 | continue; | |
530 | ||
531 | if (priv->stations[i].used & IWL_STA_UCODE_ACTIVE) { | |
532 | IWL_DEBUG_INFO(priv, | |
533 | "Clearing ucode active for station %d\n", i); | |
534 | priv->stations[i].used &= ~IWL_STA_UCODE_ACTIVE; | |
535 | cleared = true; | |
536 | } | |
537 | } | |
fa23cb04 | 538 | spin_unlock_bh(&priv->sta_lock); |
c745f55b WYG |
539 | |
540 | if (!cleared) | |
541 | IWL_DEBUG_INFO(priv, | |
542 | "No active stations found to be cleared\n"); | |
543 | } | |
544 | ||
545 | /** | |
546 | * iwl_restore_stations() - Restore driver known stations to device | |
547 | * | |
548 | * All stations considered active by driver, but not present in ucode, is | |
549 | * restored. | |
550 | * | |
551 | * Function sleeps. | |
552 | */ | |
553 | void iwl_restore_stations(struct iwl_priv *priv, struct iwl_rxon_context *ctx) | |
554 | { | |
555 | struct iwl_addsta_cmd sta_cmd; | |
556 | struct iwl_link_quality_cmd lq; | |
c745f55b WYG |
557 | int i; |
558 | bool found = false; | |
559 | int ret; | |
560 | bool send_lq; | |
561 | ||
562 | if (!iwl_is_ready(priv->shrd)) { | |
563 | IWL_DEBUG_INFO(priv, | |
564 | "Not ready yet, not restoring any stations.\n"); | |
565 | return; | |
566 | } | |
567 | ||
568 | IWL_DEBUG_ASSOC(priv, "Restoring all known stations ... start.\n"); | |
fa23cb04 | 569 | spin_lock_bh(&priv->sta_lock); |
c745f55b WYG |
570 | for (i = 0; i < IWLAGN_STATION_COUNT; i++) { |
571 | if (ctx->ctxid != priv->stations[i].ctxid) | |
572 | continue; | |
573 | if ((priv->stations[i].used & IWL_STA_DRIVER_ACTIVE) && | |
574 | !(priv->stations[i].used & IWL_STA_UCODE_ACTIVE)) { | |
575 | IWL_DEBUG_ASSOC(priv, "Restoring sta %pM\n", | |
576 | priv->stations[i].sta.sta.addr); | |
577 | priv->stations[i].sta.mode = 0; | |
578 | priv->stations[i].used |= IWL_STA_UCODE_INPROGRESS; | |
579 | found = true; | |
580 | } | |
581 | } | |
582 | ||
583 | for (i = 0; i < IWLAGN_STATION_COUNT; i++) { | |
584 | if ((priv->stations[i].used & IWL_STA_UCODE_INPROGRESS)) { | |
585 | memcpy(&sta_cmd, &priv->stations[i].sta, | |
586 | sizeof(struct iwl_addsta_cmd)); | |
587 | send_lq = false; | |
588 | if (priv->stations[i].lq) { | |
15b86bff | 589 | if (priv->wowlan) |
c745f55b WYG |
590 | iwl_sta_fill_lq(priv, ctx, i, &lq); |
591 | else | |
592 | memcpy(&lq, priv->stations[i].lq, | |
593 | sizeof(struct iwl_link_quality_cmd)); | |
594 | send_lq = true; | |
595 | } | |
fa23cb04 | 596 | spin_unlock_bh(&priv->sta_lock); |
c745f55b WYG |
597 | ret = iwl_send_add_sta(priv, &sta_cmd, CMD_SYNC); |
598 | if (ret) { | |
fa23cb04 | 599 | spin_lock_bh(&priv->sta_lock); |
c745f55b WYG |
600 | IWL_ERR(priv, "Adding station %pM failed.\n", |
601 | priv->stations[i].sta.sta.addr); | |
602 | priv->stations[i].used &= | |
603 | ~IWL_STA_DRIVER_ACTIVE; | |
604 | priv->stations[i].used &= | |
605 | ~IWL_STA_UCODE_INPROGRESS; | |
fa23cb04 | 606 | spin_unlock_bh(&priv->sta_lock); |
c745f55b WYG |
607 | } |
608 | /* | |
609 | * Rate scaling has already been initialized, send | |
610 | * current LQ command | |
611 | */ | |
612 | if (send_lq) | |
613 | iwl_send_lq_cmd(priv, ctx, &lq, | |
614 | CMD_SYNC, true); | |
fa23cb04 | 615 | spin_lock_bh(&priv->sta_lock); |
c745f55b WYG |
616 | priv->stations[i].used &= ~IWL_STA_UCODE_INPROGRESS; |
617 | } | |
618 | } | |
619 | ||
fa23cb04 | 620 | spin_unlock_bh(&priv->sta_lock); |
c745f55b WYG |
621 | if (!found) |
622 | IWL_DEBUG_INFO(priv, "Restoring all known stations .... " | |
623 | "no stations to be restored.\n"); | |
624 | else | |
625 | IWL_DEBUG_INFO(priv, "Restoring all known stations .... " | |
626 | "complete.\n"); | |
627 | } | |
628 | ||
c745f55b WYG |
629 | int iwl_get_free_ucode_key_offset(struct iwl_priv *priv) |
630 | { | |
631 | int i; | |
632 | ||
633 | for (i = 0; i < priv->sta_key_max_num; i++) | |
634 | if (!test_and_set_bit(i, &priv->ucode_key_table)) | |
635 | return i; | |
636 | ||
637 | return WEP_INVALID_OFFSET; | |
638 | } | |
639 | ||
640 | void iwl_dealloc_bcast_stations(struct iwl_priv *priv) | |
641 | { | |
c745f55b WYG |
642 | int i; |
643 | ||
fa23cb04 | 644 | spin_lock_bh(&priv->sta_lock); |
c745f55b WYG |
645 | for (i = 0; i < IWLAGN_STATION_COUNT; i++) { |
646 | if (!(priv->stations[i].used & IWL_STA_BCAST)) | |
647 | continue; | |
648 | ||
649 | priv->stations[i].used &= ~IWL_STA_UCODE_ACTIVE; | |
650 | priv->num_stations--; | |
651 | if (WARN_ON(priv->num_stations < 0)) | |
652 | priv->num_stations = 0; | |
653 | kfree(priv->stations[i].lq); | |
654 | priv->stations[i].lq = NULL; | |
655 | } | |
fa23cb04 | 656 | spin_unlock_bh(&priv->sta_lock); |
c745f55b WYG |
657 | } |
658 | ||
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; | |
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", | |
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++) | |
670 | IWL_DEBUG_RATE(priv, "lq index %d 0x%X\n", | |
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 | ||
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, | |
692 | struct iwl_rxon_context *ctx, | |
693 | struct iwl_link_quality_cmd *lq) | |
694 | { | |
695 | int i; | |
696 | ||
697 | if (ctx->ht.enabled) | |
698 | return true; | |
699 | ||
700 | IWL_DEBUG_INFO(priv, "Channel %u is not an HT channel\n", | |
701 | ctx->active.channel); | |
702 | for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++) { | |
703 | if (le32_to_cpu(lq->rs_table[i].rate_n_flags) & | |
704 | RATE_MCS_HT_MSK) { | |
705 | IWL_DEBUG_INFO(priv, | |
706 | "index %d of LQ expects HT channel\n", | |
707 | i); | |
708 | return false; | |
709 | } | |
710 | } | |
711 | return true; | |
712 | } | |
713 | ||
714 | /** | |
715 | * iwl_send_lq_cmd() - Send link quality command | |
716 | * @init: This command is sent as part of station initialization right | |
717 | * after station has been added. | |
718 | * | |
719 | * The link quality command is sent as the last step of station creation. | |
720 | * This is the special case in which init is set and we call a callback in | |
721 | * this case to clear the state indicating that station creation is in | |
722 | * progress. | |
723 | */ | |
724 | int iwl_send_lq_cmd(struct iwl_priv *priv, struct iwl_rxon_context *ctx, | |
725 | struct iwl_link_quality_cmd *lq, u8 flags, bool init) | |
726 | { | |
727 | int ret = 0; | |
c745f55b WYG |
728 | struct iwl_host_cmd cmd = { |
729 | .id = REPLY_TX_LINK_QUALITY_CMD, | |
730 | .len = { sizeof(struct iwl_link_quality_cmd), }, | |
731 | .flags = flags, | |
732 | .data = { lq, }, | |
733 | }; | |
734 | ||
735 | if (WARN_ON(lq->sta_id == IWL_INVALID_STATION)) | |
736 | return -EINVAL; | |
737 | ||
738 | ||
fa23cb04 | 739 | spin_lock_bh(&priv->sta_lock); |
c745f55b | 740 | if (!(priv->stations[lq->sta_id].used & IWL_STA_DRIVER_ACTIVE)) { |
fa23cb04 | 741 | spin_unlock_bh(&priv->sta_lock); |
c745f55b WYG |
742 | return -EINVAL; |
743 | } | |
fa23cb04 | 744 | spin_unlock_bh(&priv->sta_lock); |
c745f55b WYG |
745 | |
746 | iwl_dump_lq_cmd(priv, lq); | |
747 | if (WARN_ON(init && (cmd.flags & CMD_ASYNC))) | |
748 | return -EINVAL; | |
749 | ||
750 | if (is_lq_table_valid(priv, ctx, lq)) | |
751 | ret = iwl_trans_send_cmd(trans(priv), &cmd); | |
752 | else | |
753 | ret = -EINVAL; | |
754 | ||
755 | if (cmd.flags & CMD_ASYNC) | |
756 | return ret; | |
757 | ||
758 | if (init) { | |
759 | IWL_DEBUG_INFO(priv, "init LQ command complete, " | |
760 | "clearing sta addition status for sta %d\n", | |
761 | lq->sta_id); | |
fa23cb04 | 762 | spin_lock_bh(&priv->sta_lock); |
c745f55b | 763 | priv->stations[lq->sta_id].used &= ~IWL_STA_UCODE_INPROGRESS; |
fa23cb04 | 764 | spin_unlock_bh(&priv->sta_lock); |
c745f55b WYG |
765 | } |
766 | return ret; | |
767 | } | |
768 | ||
c745f55b | 769 | |
c079166e JB |
770 | void iwl_sta_fill_lq(struct iwl_priv *priv, struct iwl_rxon_context *ctx, |
771 | u8 sta_id, struct iwl_link_quality_cmd *link_cmd) | |
a30e3112 JB |
772 | { |
773 | int i, r; | |
a30e3112 JB |
774 | u32 rate_flags = 0; |
775 | __le32 rate_n_flags; | |
776 | ||
6ac2f839 | 777 | lockdep_assert_held(&priv->shrd->mutex); |
f775aa06 | 778 | |
c079166e JB |
779 | memset(link_cmd, 0, sizeof(*link_cmd)); |
780 | ||
a30e3112 JB |
781 | /* Set up the rate scaling to start at selected rate, fall back |
782 | * all the way down to 1M in IEEE order, and then spin on 1M */ | |
783 | if (priv->band == IEEE80211_BAND_5GHZ) | |
784 | r = IWL_RATE_6M_INDEX; | |
f775aa06 JB |
785 | else if (ctx && ctx->vif && ctx->vif->p2p) |
786 | r = IWL_RATE_6M_INDEX; | |
a30e3112 JB |
787 | else |
788 | r = IWL_RATE_1M_INDEX; | |
789 | ||
790 | if (r >= IWL_FIRST_CCK_RATE && r <= IWL_LAST_CCK_RATE) | |
791 | rate_flags |= RATE_MCS_CCK_MSK; | |
792 | ||
d6189124 | 793 | rate_flags |= first_antenna(hw_params(priv).valid_tx_ant) << |
a30e3112 JB |
794 | RATE_MCS_ANT_POS; |
795 | rate_n_flags = iwl_hw_set_rate_n_flags(iwl_rates[r].plcp, rate_flags); | |
796 | for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++) | |
797 | link_cmd->rs_table[i].rate_n_flags = rate_n_flags; | |
798 | ||
799 | link_cmd->general_params.single_stream_ant_msk = | |
d6189124 | 800 | first_antenna(hw_params(priv).valid_tx_ant); |
a30e3112 JB |
801 | |
802 | link_cmd->general_params.dual_stream_ant_msk = | |
d6189124 EG |
803 | hw_params(priv).valid_tx_ant & |
804 | ~first_antenna(hw_params(priv).valid_tx_ant); | |
a30e3112 JB |
805 | if (!link_cmd->general_params.dual_stream_ant_msk) { |
806 | link_cmd->general_params.dual_stream_ant_msk = ANT_AB; | |
d6189124 | 807 | } else if (num_of_ant(hw_params(priv).valid_tx_ant) == 2) { |
a30e3112 | 808 | link_cmd->general_params.dual_stream_ant_msk = |
d6189124 | 809 | hw_params(priv).valid_tx_ant; |
a30e3112 JB |
810 | } |
811 | ||
c745f55b WYG |
812 | link_cmd->agg_params.agg_dis_start_th = |
813 | LINK_QUAL_AGG_DISABLE_START_DEF; | |
a30e3112 JB |
814 | link_cmd->agg_params.agg_time_limit = |
815 | cpu_to_le16(LINK_QUAL_AGG_TIME_LIMIT_DEF); | |
816 | ||
817 | link_cmd->sta_id = sta_id; | |
c079166e JB |
818 | } |
819 | ||
820 | static struct iwl_link_quality_cmd * | |
c745f55b WYG |
821 | iwl_sta_alloc_lq(struct iwl_priv *priv, struct iwl_rxon_context *ctx, |
822 | u8 sta_id) | |
c079166e JB |
823 | { |
824 | struct iwl_link_quality_cmd *link_cmd; | |
825 | ||
826 | link_cmd = kzalloc(sizeof(struct iwl_link_quality_cmd), GFP_KERNEL); | |
827 | if (!link_cmd) { | |
828 | IWL_ERR(priv, "Unable to allocate memory for LQ cmd.\n"); | |
829 | return NULL; | |
830 | } | |
831 | ||
832 | iwl_sta_fill_lq(priv, ctx, sta_id, link_cmd); | |
a30e3112 JB |
833 | |
834 | return link_cmd; | |
835 | } | |
836 | ||
837 | /* | |
838 | * iwlagn_add_bssid_station - Add the special IBSS BSSID station | |
839 | * | |
840 | * Function sleeps. | |
841 | */ | |
c745f55b WYG |
842 | int iwlagn_add_bssid_station(struct iwl_priv *priv, |
843 | struct iwl_rxon_context *ctx, | |
a30e3112 JB |
844 | const u8 *addr, u8 *sta_id_r) |
845 | { | |
846 | int ret; | |
847 | u8 sta_id; | |
848 | struct iwl_link_quality_cmd *link_cmd; | |
a30e3112 JB |
849 | |
850 | if (sta_id_r) | |
851 | *sta_id_r = IWL_INVALID_STATION; | |
852 | ||
853 | ret = iwl_add_station_common(priv, ctx, addr, 0, NULL, &sta_id); | |
854 | if (ret) { | |
855 | IWL_ERR(priv, "Unable to add station %pM\n", addr); | |
856 | return ret; | |
857 | } | |
858 | ||
859 | if (sta_id_r) | |
860 | *sta_id_r = sta_id; | |
861 | ||
fa23cb04 | 862 | spin_lock_bh(&priv->sta_lock); |
a30e3112 | 863 | priv->stations[sta_id].used |= IWL_STA_LOCAL; |
fa23cb04 | 864 | spin_unlock_bh(&priv->sta_lock); |
a30e3112 JB |
865 | |
866 | /* Set up default rate scaling table in device's station table */ | |
f775aa06 | 867 | link_cmd = iwl_sta_alloc_lq(priv, ctx, sta_id); |
a30e3112 | 868 | if (!link_cmd) { |
c745f55b WYG |
869 | IWL_ERR(priv, |
870 | "Unable to initialize rate scaling for station %pM.\n", | |
a30e3112 JB |
871 | addr); |
872 | return -ENOMEM; | |
873 | } | |
874 | ||
875 | ret = iwl_send_lq_cmd(priv, ctx, link_cmd, CMD_SYNC, true); | |
876 | if (ret) | |
877 | IWL_ERR(priv, "Link quality command failed (%d)\n", ret); | |
878 | ||
fa23cb04 | 879 | spin_lock_bh(&priv->sta_lock); |
a30e3112 | 880 | priv->stations[sta_id].lq = link_cmd; |
fa23cb04 | 881 | spin_unlock_bh(&priv->sta_lock); |
a30e3112 JB |
882 | |
883 | return 0; | |
884 | } | |
885 | ||
5a3d9882 JB |
886 | /* |
887 | * static WEP keys | |
888 | * | |
889 | * For each context, the device has a table of 4 static WEP keys | |
890 | * (one for each key index) that is updated with the following | |
891 | * commands. | |
892 | */ | |
893 | ||
a30e3112 JB |
894 | static int iwl_send_static_wepkey_cmd(struct iwl_priv *priv, |
895 | struct iwl_rxon_context *ctx, | |
896 | bool send_if_empty) | |
897 | { | |
898 | int i, not_empty = 0; | |
899 | u8 buff[sizeof(struct iwl_wep_cmd) + | |
900 | sizeof(struct iwl_wep_key) * WEP_KEYS_MAX]; | |
901 | struct iwl_wep_cmd *wep_cmd = (struct iwl_wep_cmd *)buff; | |
902 | size_t cmd_size = sizeof(struct iwl_wep_cmd); | |
903 | struct iwl_host_cmd cmd = { | |
904 | .id = ctx->wep_key_cmd, | |
3fa50738 | 905 | .data = { wep_cmd, }, |
a30e3112 JB |
906 | .flags = CMD_SYNC, |
907 | }; | |
908 | ||
909 | might_sleep(); | |
910 | ||
911 | memset(wep_cmd, 0, cmd_size + | |
912 | (sizeof(struct iwl_wep_key) * WEP_KEYS_MAX)); | |
913 | ||
914 | for (i = 0; i < WEP_KEYS_MAX ; i++) { | |
915 | wep_cmd->key[i].key_index = i; | |
916 | if (ctx->wep_keys[i].key_size) { | |
917 | wep_cmd->key[i].key_offset = i; | |
918 | not_empty = 1; | |
919 | } else { | |
920 | wep_cmd->key[i].key_offset = WEP_INVALID_OFFSET; | |
921 | } | |
922 | ||
923 | wep_cmd->key[i].key_size = ctx->wep_keys[i].key_size; | |
924 | memcpy(&wep_cmd->key[i].key[3], ctx->wep_keys[i].key, | |
925 | ctx->wep_keys[i].key_size); | |
926 | } | |
927 | ||
928 | wep_cmd->global_key_type = WEP_KEY_WEP_TYPE; | |
929 | wep_cmd->num_keys = WEP_KEYS_MAX; | |
930 | ||
931 | cmd_size += sizeof(struct iwl_wep_key) * WEP_KEYS_MAX; | |
932 | ||
3fa50738 | 933 | cmd.len[0] = cmd_size; |
a30e3112 JB |
934 | |
935 | if (not_empty || send_if_empty) | |
e6bb4c9c | 936 | return iwl_trans_send_cmd(trans(priv), &cmd); |
a30e3112 JB |
937 | else |
938 | return 0; | |
939 | } | |
940 | ||
941 | int iwl_restore_default_wep_keys(struct iwl_priv *priv, | |
942 | struct iwl_rxon_context *ctx) | |
943 | { | |
6ac2f839 | 944 | lockdep_assert_held(&priv->shrd->mutex); |
a30e3112 JB |
945 | |
946 | return iwl_send_static_wepkey_cmd(priv, ctx, false); | |
947 | } | |
948 | ||
949 | int iwl_remove_default_wep_key(struct iwl_priv *priv, | |
950 | struct iwl_rxon_context *ctx, | |
951 | struct ieee80211_key_conf *keyconf) | |
952 | { | |
953 | int ret; | |
954 | ||
6ac2f839 | 955 | lockdep_assert_held(&priv->shrd->mutex); |
a30e3112 JB |
956 | |
957 | IWL_DEBUG_WEP(priv, "Removing default WEP key: idx=%d\n", | |
958 | keyconf->keyidx); | |
959 | ||
960 | memset(&ctx->wep_keys[keyconf->keyidx], 0, sizeof(ctx->wep_keys[0])); | |
845a9c0d | 961 | if (iwl_is_rfkill(priv->shrd)) { |
c745f55b WYG |
962 | IWL_DEBUG_WEP(priv, |
963 | "Not sending REPLY_WEPKEY command due to RFKILL.\n"); | |
a30e3112 JB |
964 | /* but keys in device are clear anyway so return success */ |
965 | return 0; | |
966 | } | |
967 | ret = iwl_send_static_wepkey_cmd(priv, ctx, 1); | |
968 | IWL_DEBUG_WEP(priv, "Remove default WEP key: idx=%d ret=%d\n", | |
969 | keyconf->keyidx, ret); | |
970 | ||
971 | return ret; | |
972 | } | |
973 | ||
974 | int iwl_set_default_wep_key(struct iwl_priv *priv, | |
975 | struct iwl_rxon_context *ctx, | |
976 | struct ieee80211_key_conf *keyconf) | |
977 | { | |
978 | int ret; | |
979 | ||
6ac2f839 | 980 | lockdep_assert_held(&priv->shrd->mutex); |
a30e3112 JB |
981 | |
982 | if (keyconf->keylen != WEP_KEY_LEN_128 && | |
983 | keyconf->keylen != WEP_KEY_LEN_64) { | |
c745f55b WYG |
984 | IWL_DEBUG_WEP(priv, |
985 | "Bad WEP key length %d\n", keyconf->keylen); | |
a30e3112 JB |
986 | return -EINVAL; |
987 | } | |
988 | ||
5a3d9882 | 989 | keyconf->hw_key_idx = IWLAGN_HW_KEY_DEFAULT; |
a30e3112 JB |
990 | |
991 | ctx->wep_keys[keyconf->keyidx].key_size = keyconf->keylen; | |
992 | memcpy(&ctx->wep_keys[keyconf->keyidx].key, &keyconf->key, | |
993 | keyconf->keylen); | |
994 | ||
995 | ret = iwl_send_static_wepkey_cmd(priv, ctx, false); | |
996 | IWL_DEBUG_WEP(priv, "Set default WEP key: len=%d idx=%d ret=%d\n", | |
997 | keyconf->keylen, keyconf->keyidx, ret); | |
998 | ||
999 | return ret; | |
1000 | } | |
1001 | ||
5a3d9882 JB |
1002 | /* |
1003 | * dynamic (per-station) keys | |
1004 | * | |
1005 | * The dynamic keys are a little more complicated. The device has | |
1006 | * a key cache of up to STA_KEY_MAX_NUM/STA_KEY_MAX_NUM_PAN keys. | |
1007 | * These are linked to stations by a table that contains an index | |
1008 | * into the key table for each station/key index/{mcast,unicast}, | |
1009 | * i.e. it's basically an array of pointers like this: | |
1010 | * key_offset_t key_mapping[NUM_STATIONS][4][2]; | |
1011 | * (it really works differently, but you can think of it as such) | |
1012 | * | |
1013 | * The key uploading and linking happens in the same command, the | |
1014 | * add station command with STA_MODIFY_KEY_MASK. | |
1015 | */ | |
a30e3112 | 1016 | |
5a3d9882 JB |
1017 | static u8 iwlagn_key_sta_id(struct iwl_priv *priv, |
1018 | struct ieee80211_vif *vif, | |
1019 | struct ieee80211_sta *sta) | |
1020 | { | |
1021 | struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv; | |
5a3d9882 JB |
1022 | |
1023 | if (sta) | |
40e4e686 | 1024 | return iwl_sta_id(sta); |
5a3d9882 JB |
1025 | |
1026 | /* | |
1027 | * The device expects GTKs for station interfaces to be | |
1028 | * installed as GTKs for the AP station. If we have no | |
1029 | * station ID, then use the ap_sta_id in that case. | |
1030 | */ | |
40e4e686 JB |
1031 | if (vif->type == NL80211_IFTYPE_STATION && vif_priv->ctx) |
1032 | return vif_priv->ctx->ap_sta_id; | |
a30e3112 | 1033 | |
40e4e686 | 1034 | return IWL_INVALID_STATION; |
a30e3112 JB |
1035 | } |
1036 | ||
e1b1c087 JB |
1037 | static int iwlagn_send_sta_key(struct iwl_priv *priv, |
1038 | struct ieee80211_key_conf *keyconf, | |
1039 | u8 sta_id, u32 tkip_iv32, u16 *tkip_p1k, | |
1040 | u32 cmd_flags) | |
a30e3112 | 1041 | { |
5a3d9882 | 1042 | __le16 key_flags; |
a30e3112 | 1043 | struct iwl_addsta_cmd sta_cmd; |
5a3d9882 | 1044 | int i; |
e1b1c087 | 1045 | |
fa23cb04 | 1046 | spin_lock_bh(&priv->sta_lock); |
5a3d9882 | 1047 | memcpy(&sta_cmd, &priv->stations[sta_id].sta, sizeof(sta_cmd)); |
fa23cb04 | 1048 | spin_unlock_bh(&priv->sta_lock); |
a30e3112 | 1049 | |
5a3d9882 JB |
1050 | key_flags = cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS); |
1051 | key_flags |= STA_KEY_FLG_MAP_KEY_MSK; | |
a30e3112 | 1052 | |
5a3d9882 JB |
1053 | switch (keyconf->cipher) { |
1054 | case WLAN_CIPHER_SUITE_CCMP: | |
1055 | key_flags |= STA_KEY_FLG_CCMP; | |
1056 | memcpy(sta_cmd.key.key, keyconf->key, keyconf->keylen); | |
1057 | break; | |
1058 | case WLAN_CIPHER_SUITE_TKIP: | |
1059 | key_flags |= STA_KEY_FLG_TKIP; | |
1060 | sta_cmd.key.tkip_rx_tsc_byte2 = tkip_iv32; | |
1061 | for (i = 0; i < 5; i++) | |
1062 | sta_cmd.key.tkip_rx_ttak[i] = cpu_to_le16(tkip_p1k[i]); | |
1063 | memcpy(sta_cmd.key.key, keyconf->key, keyconf->keylen); | |
1064 | break; | |
1065 | case WLAN_CIPHER_SUITE_WEP104: | |
1066 | key_flags |= STA_KEY_FLG_KEY_SIZE_MSK; | |
1067 | /* fall through */ | |
1068 | case WLAN_CIPHER_SUITE_WEP40: | |
1069 | key_flags |= STA_KEY_FLG_WEP; | |
1070 | memcpy(&sta_cmd.key.key[3], keyconf->key, keyconf->keylen); | |
1071 | break; | |
1072 | default: | |
1073 | WARN_ON(1); | |
1074 | return -EINVAL; | |
1075 | } | |
a30e3112 | 1076 | |
5a3d9882 | 1077 | if (!(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE)) |
a30e3112 JB |
1078 | key_flags |= STA_KEY_MULTICAST_MSK; |
1079 | ||
5a3d9882 JB |
1080 | /* key pointer (offset) */ |
1081 | sta_cmd.key.key_offset = keyconf->hw_key_idx; | |
a30e3112 | 1082 | |
5a3d9882 JB |
1083 | sta_cmd.key.key_flags = key_flags; |
1084 | sta_cmd.mode = STA_CONTROL_MODIFY_MSK; | |
1085 | sta_cmd.sta.modify_mask = STA_MODIFY_KEY_MASK; | |
a30e3112 | 1086 | |
5a3d9882 | 1087 | return iwl_send_add_sta(priv, &sta_cmd, cmd_flags); |
a30e3112 JB |
1088 | } |
1089 | ||
1090 | void iwl_update_tkip_key(struct iwl_priv *priv, | |
5a3d9882 | 1091 | struct ieee80211_vif *vif, |
a30e3112 JB |
1092 | struct ieee80211_key_conf *keyconf, |
1093 | struct ieee80211_sta *sta, u32 iv32, u16 *phase1key) | |
1094 | { | |
5a3d9882 JB |
1095 | u8 sta_id = iwlagn_key_sta_id(priv, vif, sta); |
1096 | ||
1097 | if (sta_id == IWL_INVALID_STATION) | |
1098 | return; | |
a30e3112 JB |
1099 | |
1100 | if (iwl_scan_cancel(priv)) { | |
1101 | /* cancel scan failed, just live w/ bad key and rely | |
1102 | briefly on SW decryption */ | |
1103 | return; | |
1104 | } | |
1105 | ||
e1b1c087 JB |
1106 | iwlagn_send_sta_key(priv, keyconf, sta_id, |
1107 | iv32, phase1key, CMD_ASYNC); | |
a30e3112 JB |
1108 | } |
1109 | ||
1110 | int iwl_remove_dynamic_key(struct iwl_priv *priv, | |
1111 | struct iwl_rxon_context *ctx, | |
1112 | struct ieee80211_key_conf *keyconf, | |
5a3d9882 | 1113 | struct ieee80211_sta *sta) |
a30e3112 | 1114 | { |
a30e3112 | 1115 | struct iwl_addsta_cmd sta_cmd; |
5a3d9882 | 1116 | u8 sta_id = iwlagn_key_sta_id(priv, ctx->vif, sta); |
5dcbf480 | 1117 | __le16 key_flags; |
5a3d9882 JB |
1118 | |
1119 | /* if station isn't there, neither is the key */ | |
1120 | if (sta_id == IWL_INVALID_STATION) | |
1121 | return -ENOENT; | |
1122 | ||
fa23cb04 | 1123 | spin_lock_bh(&priv->sta_lock); |
5a3d9882 JB |
1124 | memcpy(&sta_cmd, &priv->stations[sta_id].sta, sizeof(sta_cmd)); |
1125 | if (!(priv->stations[sta_id].used & IWL_STA_UCODE_ACTIVE)) | |
1126 | sta_id = IWL_INVALID_STATION; | |
fa23cb04 | 1127 | spin_unlock_bh(&priv->sta_lock); |
5a3d9882 JB |
1128 | |
1129 | if (sta_id == IWL_INVALID_STATION) | |
1130 | return 0; | |
a30e3112 | 1131 | |
6ac2f839 | 1132 | lockdep_assert_held(&priv->shrd->mutex); |
a30e3112 JB |
1133 | |
1134 | ctx->key_mapping_keys--; | |
1135 | ||
a30e3112 JB |
1136 | IWL_DEBUG_WEP(priv, "Remove dynamic key: idx=%d sta=%d\n", |
1137 | keyconf->keyidx, sta_id); | |
1138 | ||
5a3d9882 JB |
1139 | if (!test_and_clear_bit(keyconf->hw_key_idx, &priv->ucode_key_table)) |
1140 | IWL_ERR(priv, "offset %d not used in uCode key table.\n", | |
1141 | keyconf->hw_key_idx); | |
a30e3112 | 1142 | |
5dcbf480 JB |
1143 | key_flags = cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS); |
1144 | key_flags |= STA_KEY_FLG_MAP_KEY_MSK | STA_KEY_FLG_NO_ENC | | |
1145 | STA_KEY_FLG_INVALID; | |
1146 | ||
1147 | if (!(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE)) | |
1148 | key_flags |= STA_KEY_MULTICAST_MSK; | |
1149 | ||
1150 | sta_cmd.key.key_flags = key_flags; | |
5a3d9882 JB |
1151 | sta_cmd.key.key_offset = WEP_INVALID_OFFSET; |
1152 | sta_cmd.sta.modify_mask = STA_MODIFY_KEY_MASK; | |
1153 | sta_cmd.mode = STA_CONTROL_MODIFY_MSK; | |
a30e3112 JB |
1154 | |
1155 | return iwl_send_add_sta(priv, &sta_cmd, CMD_SYNC); | |
1156 | } | |
1157 | ||
5a3d9882 JB |
1158 | int iwl_set_dynamic_key(struct iwl_priv *priv, |
1159 | struct iwl_rxon_context *ctx, | |
1160 | struct ieee80211_key_conf *keyconf, | |
1161 | struct ieee80211_sta *sta) | |
a30e3112 | 1162 | { |
5a3d9882 JB |
1163 | struct ieee80211_key_seq seq; |
1164 | u16 p1k[5]; | |
a30e3112 | 1165 | int ret; |
5a3d9882 JB |
1166 | u8 sta_id = iwlagn_key_sta_id(priv, ctx->vif, sta); |
1167 | const u8 *addr; | |
1168 | ||
1169 | if (sta_id == IWL_INVALID_STATION) | |
1170 | return -EINVAL; | |
a30e3112 | 1171 | |
6ac2f839 | 1172 | lockdep_assert_held(&priv->shrd->mutex); |
a30e3112 | 1173 | |
5a3d9882 JB |
1174 | keyconf->hw_key_idx = iwl_get_free_ucode_key_offset(priv); |
1175 | if (keyconf->hw_key_idx == WEP_INVALID_OFFSET) | |
1176 | return -ENOSPC; | |
1177 | ||
a30e3112 | 1178 | ctx->key_mapping_keys++; |
a30e3112 JB |
1179 | |
1180 | switch (keyconf->cipher) { | |
a30e3112 | 1181 | case WLAN_CIPHER_SUITE_TKIP: |
5a3d9882 JB |
1182 | if (sta) |
1183 | addr = sta->addr; | |
1184 | else /* station mode case only */ | |
1185 | addr = ctx->active.bssid_addr; | |
1186 | ||
1187 | /* pre-fill phase 1 key into device cache */ | |
1188 | ieee80211_get_key_rx_seq(keyconf, 0, &seq); | |
1189 | ieee80211_get_tkip_rx_p1k(keyconf, addr, seq.tkip.iv32, p1k); | |
e1b1c087 JB |
1190 | ret = iwlagn_send_sta_key(priv, keyconf, sta_id, |
1191 | seq.tkip.iv32, p1k, CMD_SYNC); | |
a30e3112 | 1192 | break; |
5a3d9882 | 1193 | case WLAN_CIPHER_SUITE_CCMP: |
a30e3112 JB |
1194 | case WLAN_CIPHER_SUITE_WEP40: |
1195 | case WLAN_CIPHER_SUITE_WEP104: | |
e1b1c087 JB |
1196 | ret = iwlagn_send_sta_key(priv, keyconf, sta_id, |
1197 | 0, NULL, CMD_SYNC); | |
a30e3112 JB |
1198 | break; |
1199 | default: | |
5a3d9882 | 1200 | IWL_ERR(priv, "Unknown cipher %x\n", keyconf->cipher); |
a30e3112 JB |
1201 | ret = -EINVAL; |
1202 | } | |
1203 | ||
5a3d9882 JB |
1204 | if (ret) { |
1205 | ctx->key_mapping_keys--; | |
1206 | clear_bit(keyconf->hw_key_idx, &priv->ucode_key_table); | |
1207 | } | |
1208 | ||
1209 | IWL_DEBUG_WEP(priv, "Set dynamic key: cipher=%x len=%d idx=%d sta=%pM ret=%d\n", | |
a30e3112 | 1210 | keyconf->cipher, keyconf->keylen, keyconf->keyidx, |
5a3d9882 | 1211 | sta ? sta->addr : NULL, ret); |
a30e3112 JB |
1212 | |
1213 | return ret; | |
1214 | } | |
1215 | ||
1216 | /** | |
1217 | * iwlagn_alloc_bcast_station - add broadcast station into driver's station table. | |
1218 | * | |
1219 | * This adds the broadcast station into the driver's station table | |
1220 | * and marks it driver active, so that it will be restored to the | |
1221 | * device at the next best time. | |
1222 | */ | |
1223 | int iwlagn_alloc_bcast_station(struct iwl_priv *priv, | |
1224 | struct iwl_rxon_context *ctx) | |
1225 | { | |
1226 | struct iwl_link_quality_cmd *link_cmd; | |
a30e3112 JB |
1227 | u8 sta_id; |
1228 | ||
fa23cb04 | 1229 | spin_lock_bh(&priv->sta_lock); |
a30e3112 JB |
1230 | sta_id = iwl_prep_station(priv, ctx, iwl_bcast_addr, false, NULL); |
1231 | if (sta_id == IWL_INVALID_STATION) { | |
1232 | IWL_ERR(priv, "Unable to prepare broadcast station\n"); | |
fa23cb04 | 1233 | spin_unlock_bh(&priv->sta_lock); |
a30e3112 JB |
1234 | |
1235 | return -EINVAL; | |
1236 | } | |
1237 | ||
1238 | priv->stations[sta_id].used |= IWL_STA_DRIVER_ACTIVE; | |
1239 | priv->stations[sta_id].used |= IWL_STA_BCAST; | |
fa23cb04 | 1240 | spin_unlock_bh(&priv->sta_lock); |
a30e3112 | 1241 | |
f775aa06 | 1242 | link_cmd = iwl_sta_alloc_lq(priv, ctx, sta_id); |
a30e3112 JB |
1243 | if (!link_cmd) { |
1244 | IWL_ERR(priv, | |
1245 | "Unable to initialize rate scaling for bcast station.\n"); | |
1246 | return -ENOMEM; | |
1247 | } | |
1248 | ||
fa23cb04 | 1249 | spin_lock_bh(&priv->sta_lock); |
a30e3112 | 1250 | priv->stations[sta_id].lq = link_cmd; |
fa23cb04 | 1251 | spin_unlock_bh(&priv->sta_lock); |
a30e3112 JB |
1252 | |
1253 | return 0; | |
1254 | } | |
1255 | ||
1256 | /** | |
1257 | * iwl_update_bcast_station - update broadcast station's LQ command | |
1258 | * | |
1259 | * Only used by iwlagn. Placed here to have all bcast station management | |
1260 | * code together. | |
1261 | */ | |
f775aa06 JB |
1262 | int iwl_update_bcast_station(struct iwl_priv *priv, |
1263 | struct iwl_rxon_context *ctx) | |
a30e3112 | 1264 | { |
a30e3112 JB |
1265 | struct iwl_link_quality_cmd *link_cmd; |
1266 | u8 sta_id = ctx->bcast_sta_id; | |
1267 | ||
f775aa06 | 1268 | link_cmd = iwl_sta_alloc_lq(priv, ctx, sta_id); |
a30e3112 JB |
1269 | if (!link_cmd) { |
1270 | IWL_ERR(priv, "Unable to initialize rate scaling for bcast station.\n"); | |
1271 | return -ENOMEM; | |
1272 | } | |
1273 | ||
fa23cb04 | 1274 | spin_lock_bh(&priv->sta_lock); |
a30e3112 JB |
1275 | if (priv->stations[sta_id].lq) |
1276 | kfree(priv->stations[sta_id].lq); | |
1277 | else | |
1278 | IWL_DEBUG_INFO(priv, "Bcast station rate scaling has not been initialized yet.\n"); | |
1279 | priv->stations[sta_id].lq = link_cmd; | |
fa23cb04 | 1280 | spin_unlock_bh(&priv->sta_lock); |
a30e3112 JB |
1281 | |
1282 | return 0; | |
1283 | } | |
1284 | ||
1285 | int iwl_update_bcast_stations(struct iwl_priv *priv) | |
1286 | { | |
1287 | struct iwl_rxon_context *ctx; | |
1288 | int ret = 0; | |
1289 | ||
1290 | for_each_context(priv, ctx) { | |
1291 | ret = iwl_update_bcast_station(priv, ctx); | |
1292 | if (ret) | |
1293 | break; | |
1294 | } | |
1295 | ||
1296 | return ret; | |
1297 | } | |
1298 | ||
1299 | /** | |
1300 | * iwl_sta_tx_modify_enable_tid - Enable Tx for this TID in station table | |
1301 | */ | |
1302 | int iwl_sta_tx_modify_enable_tid(struct iwl_priv *priv, int sta_id, int tid) | |
1303 | { | |
a30e3112 JB |
1304 | struct iwl_addsta_cmd sta_cmd; |
1305 | ||
6ac2f839 | 1306 | lockdep_assert_held(&priv->shrd->mutex); |
a30e3112 JB |
1307 | |
1308 | /* Remove "disable" flag, to enable Tx for this TID */ | |
fa23cb04 | 1309 | spin_lock_bh(&priv->sta_lock); |
a30e3112 JB |
1310 | priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_TID_DISABLE_TX; |
1311 | priv->stations[sta_id].sta.tid_disable_tx &= cpu_to_le16(~(1 << tid)); | |
1312 | priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK; | |
1313 | memcpy(&sta_cmd, &priv->stations[sta_id].sta, sizeof(struct iwl_addsta_cmd)); | |
fa23cb04 | 1314 | spin_unlock_bh(&priv->sta_lock); |
a30e3112 JB |
1315 | |
1316 | return iwl_send_add_sta(priv, &sta_cmd, CMD_SYNC); | |
1317 | } | |
1318 | ||
1319 | int iwl_sta_rx_agg_start(struct iwl_priv *priv, struct ieee80211_sta *sta, | |
1320 | int tid, u16 ssn) | |
1321 | { | |
a30e3112 JB |
1322 | int sta_id; |
1323 | struct iwl_addsta_cmd sta_cmd; | |
1324 | ||
6ac2f839 | 1325 | lockdep_assert_held(&priv->shrd->mutex); |
a30e3112 JB |
1326 | |
1327 | sta_id = iwl_sta_id(sta); | |
1328 | if (sta_id == IWL_INVALID_STATION) | |
1329 | return -ENXIO; | |
1330 | ||
fa23cb04 | 1331 | spin_lock_bh(&priv->sta_lock); |
a30e3112 JB |
1332 | priv->stations[sta_id].sta.station_flags_msk = 0; |
1333 | priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_ADDBA_TID_MSK; | |
1334 | priv->stations[sta_id].sta.add_immediate_ba_tid = (u8)tid; | |
1335 | priv->stations[sta_id].sta.add_immediate_ba_ssn = cpu_to_le16(ssn); | |
1336 | priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK; | |
1337 | memcpy(&sta_cmd, &priv->stations[sta_id].sta, sizeof(struct iwl_addsta_cmd)); | |
fa23cb04 | 1338 | spin_unlock_bh(&priv->sta_lock); |
a30e3112 JB |
1339 | |
1340 | return iwl_send_add_sta(priv, &sta_cmd, CMD_SYNC); | |
1341 | } | |
1342 | ||
1343 | int iwl_sta_rx_agg_stop(struct iwl_priv *priv, struct ieee80211_sta *sta, | |
1344 | int tid) | |
1345 | { | |
a30e3112 JB |
1346 | int sta_id; |
1347 | struct iwl_addsta_cmd sta_cmd; | |
1348 | ||
6ac2f839 | 1349 | lockdep_assert_held(&priv->shrd->mutex); |
a30e3112 JB |
1350 | |
1351 | sta_id = iwl_sta_id(sta); | |
1352 | if (sta_id == IWL_INVALID_STATION) { | |
1353 | IWL_ERR(priv, "Invalid station for AGG tid %d\n", tid); | |
1354 | return -ENXIO; | |
1355 | } | |
1356 | ||
fa23cb04 | 1357 | spin_lock_bh(&priv->sta_lock); |
a30e3112 JB |
1358 | priv->stations[sta_id].sta.station_flags_msk = 0; |
1359 | priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_DELBA_TID_MSK; | |
1360 | priv->stations[sta_id].sta.remove_immediate_ba_tid = (u8)tid; | |
1361 | priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK; | |
1362 | memcpy(&sta_cmd, &priv->stations[sta_id].sta, sizeof(struct iwl_addsta_cmd)); | |
fa23cb04 | 1363 | spin_unlock_bh(&priv->sta_lock); |
a30e3112 JB |
1364 | |
1365 | return iwl_send_add_sta(priv, &sta_cmd, CMD_SYNC); | |
1366 | } | |
1367 | ||
a30e3112 | 1368 | |
a30e3112 JB |
1369 | |
1370 | void iwl_sta_modify_sleep_tx_count(struct iwl_priv *priv, int sta_id, int cnt) | |
1371 | { | |
9451ca1a JB |
1372 | struct iwl_addsta_cmd cmd = { |
1373 | .mode = STA_CONTROL_MODIFY_MSK, | |
1374 | .station_flags = STA_FLG_PWR_SAVE_MSK, | |
1375 | .station_flags_msk = STA_FLG_PWR_SAVE_MSK, | |
1376 | .sta.sta_id = sta_id, | |
1377 | .sta.modify_mask = STA_MODIFY_SLEEP_TX_COUNT_MSK, | |
1378 | .sleep_tx_count = cpu_to_le16(cnt), | |
1379 | }; | |
a30e3112 | 1380 | |
9451ca1a | 1381 | iwl_send_add_sta(priv, &cmd, CMD_ASYNC); |
a30e3112 | 1382 | } |