diff options
Diffstat (limited to 'drivers/net/wireless/iwlwifi/iwl-sta.c')
-rw-r--r-- | drivers/net/wireless/iwlwifi/iwl-sta.c | 839 |
1 files changed, 0 insertions, 839 deletions
diff --git a/drivers/net/wireless/iwlwifi/iwl-sta.c b/drivers/net/wireless/iwlwifi/iwl-sta.c deleted file mode 100644 index 586007ee3a8..00000000000 --- a/drivers/net/wireless/iwlwifi/iwl-sta.c +++ /dev/null | |||
@@ -1,839 +0,0 @@ | |||
1 | /****************************************************************************** | ||
2 | * | ||
3 | * Copyright(c) 2003 - 2011 Intel Corporation. All rights reserved. | ||
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 | #include <linux/etherdevice.h> | ||
32 | #include <linux/sched.h> | ||
33 | #include <linux/lockdep.h> | ||
34 | |||
35 | #include "iwl-dev.h" | ||
36 | #include "iwl-core.h" | ||
37 | #include "iwl-sta.h" | ||
38 | #include "iwl-trans.h" | ||
39 | #include "iwl-agn.h" | ||
40 | |||
41 | /* priv->shrd->sta_lock must be held */ | ||
42 | static void iwl_sta_ucode_activate(struct iwl_priv *priv, u8 sta_id) | ||
43 | { | ||
44 | |||
45 | if (!(priv->stations[sta_id].used & IWL_STA_DRIVER_ACTIVE)) | ||
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); | ||
48 | |||
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 | } | ||
58 | } | ||
59 | |||
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 | { | ||
64 | u8 sta_id = addsta->sta.sta_id; | ||
65 | unsigned long flags; | ||
66 | int ret = -EIO; | ||
67 | |||
68 | if (pkt->hdr.flags & IWL_CMD_FAILED_MSK) { | ||
69 | IWL_ERR(priv, "Bad return from REPLY_ADD_STA (0x%08X)\n", | ||
70 | pkt->hdr.flags); | ||
71 | return ret; | ||
72 | } | ||
73 | |||
74 | IWL_DEBUG_INFO(priv, "Processing response for adding station %u\n", | ||
75 | sta_id); | ||
76 | |||
77 | spin_lock_irqsave(&priv->shrd->sta_lock, flags); | ||
78 | |||
79 | switch (pkt->u.add_sta.status) { | ||
80 | case ADD_STA_SUCCESS_MSK: | ||
81 | IWL_DEBUG_INFO(priv, "REPLY_ADD_STA PASSED\n"); | ||
82 | iwl_sta_ucode_activate(priv, sta_id); | ||
83 | ret = 0; | ||
84 | break; | ||
85 | case ADD_STA_NO_ROOM_IN_TABLE: | ||
86 | IWL_ERR(priv, "Adding station %d failed, no room in table.\n", | ||
87 | sta_id); | ||
88 | break; | ||
89 | case ADD_STA_NO_BLOCK_ACK_RESOURCE: | ||
90 | IWL_ERR(priv, "Adding station %d failed, no block ack resource.\n", | ||
91 | sta_id); | ||
92 | break; | ||
93 | case ADD_STA_MODIFY_NON_EXIST_STA: | ||
94 | IWL_ERR(priv, "Attempting to modify non-existing station %d\n", | ||
95 | sta_id); | ||
96 | break; | ||
97 | default: | ||
98 | IWL_DEBUG_ASSOC(priv, "Received REPLY_ADD_STA:(0x%08X)\n", | ||
99 | pkt->u.add_sta.status); | ||
100 | break; | ||
101 | } | ||
102 | |||
103 | IWL_DEBUG_INFO(priv, "%s station id %u addr %pM\n", | ||
104 | priv->stations[sta_id].sta.mode == | ||
105 | STA_CONTROL_MODIFY_MSK ? "Modified" : "Added", | ||
106 | sta_id, priv->stations[sta_id].sta.sta.addr); | ||
107 | |||
108 | /* | ||
109 | * XXX: The MAC address in the command buffer is often changed from | ||
110 | * the original sent to the device. That is, the MAC address | ||
111 | * written to the command buffer often is not the same MAC address | ||
112 | * read from the command buffer when the command returns. This | ||
113 | * issue has not yet been resolved and this debugging is left to | ||
114 | * observe the problem. | ||
115 | */ | ||
116 | IWL_DEBUG_INFO(priv, "%s station according to cmd buffer %pM\n", | ||
117 | priv->stations[sta_id].sta.mode == | ||
118 | STA_CONTROL_MODIFY_MSK ? "Modified" : "Added", | ||
119 | addsta->sta.addr); | ||
120 | spin_unlock_irqrestore(&priv->shrd->sta_lock, flags); | ||
121 | |||
122 | return ret; | ||
123 | } | ||
124 | |||
125 | int iwl_add_sta_callback(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb, | ||
126 | struct iwl_device_cmd *cmd) | ||
127 | { | ||
128 | struct iwl_rx_packet *pkt = rxb_addr(rxb); | ||
129 | struct iwl_addsta_cmd *addsta = | ||
130 | (struct iwl_addsta_cmd *) cmd->payload; | ||
131 | |||
132 | return iwl_process_add_sta_resp(priv, addsta, pkt); | ||
133 | } | ||
134 | |||
135 | static u16 iwlagn_build_addsta_hcmd(const struct iwl_addsta_cmd *cmd, u8 *data) | ||
136 | { | ||
137 | u16 size = (u16)sizeof(struct iwl_addsta_cmd); | ||
138 | struct iwl_addsta_cmd *addsta = (struct iwl_addsta_cmd *)data; | ||
139 | memcpy(addsta, cmd, size); | ||
140 | /* resrved in 5000 */ | ||
141 | addsta->rate_n_flags = cpu_to_le16(0); | ||
142 | return size; | ||
143 | } | ||
144 | |||
145 | int iwl_send_add_sta(struct iwl_priv *priv, | ||
146 | struct iwl_addsta_cmd *sta, u8 flags) | ||
147 | { | ||
148 | int ret = 0; | ||
149 | u8 data[sizeof(*sta)]; | ||
150 | struct iwl_host_cmd cmd = { | ||
151 | .id = REPLY_ADD_STA, | ||
152 | .flags = flags, | ||
153 | .data = { data, }, | ||
154 | }; | ||
155 | u8 sta_id __maybe_unused = sta->sta.sta_id; | ||
156 | |||
157 | IWL_DEBUG_INFO(priv, "Adding sta %u (%pM) %ssynchronously\n", | ||
158 | sta_id, sta->sta.addr, flags & CMD_ASYNC ? "a" : ""); | ||
159 | |||
160 | if (!(flags & CMD_ASYNC)) { | ||
161 | cmd.flags |= CMD_WANT_SKB; | ||
162 | might_sleep(); | ||
163 | } | ||
164 | |||
165 | cmd.len[0] = iwlagn_build_addsta_hcmd(sta, data); | ||
166 | ret = iwl_trans_send_cmd(trans(priv), &cmd); | ||
167 | |||
168 | if (ret || (flags & CMD_ASYNC)) | ||
169 | return ret; | ||
170 | /*else the command was successfully sent in SYNC mode, need to free | ||
171 | * the reply page */ | ||
172 | |||
173 | iwl_free_pages(priv->shrd, cmd.reply_page); | ||
174 | |||
175 | if (cmd.handler_status) | ||
176 | IWL_ERR(priv, "%s - error in the CMD response %d", __func__, | ||
177 | cmd.handler_status); | ||
178 | |||
179 | return cmd.handler_status; | ||
180 | } | ||
181 | |||
182 | static void iwl_set_ht_add_station(struct iwl_priv *priv, u8 index, | ||
183 | struct ieee80211_sta *sta, | ||
184 | struct iwl_rxon_context *ctx) | ||
185 | { | ||
186 | struct ieee80211_sta_ht_cap *sta_ht_inf = &sta->ht_cap; | ||
187 | __le32 sta_flags; | ||
188 | u8 mimo_ps_mode; | ||
189 | |||
190 | if (!sta || !sta_ht_inf->ht_supported) | ||
191 | goto done; | ||
192 | |||
193 | mimo_ps_mode = (sta_ht_inf->cap & IEEE80211_HT_CAP_SM_PS) >> 2; | ||
194 | IWL_DEBUG_ASSOC(priv, "spatial multiplexing power save mode: %s\n", | ||
195 | (mimo_ps_mode == WLAN_HT_CAP_SM_PS_STATIC) ? | ||
196 | "static" : | ||
197 | (mimo_ps_mode == WLAN_HT_CAP_SM_PS_DYNAMIC) ? | ||
198 | "dynamic" : "disabled"); | ||
199 | |||
200 | sta_flags = priv->stations[index].sta.station_flags; | ||
201 | |||
202 | sta_flags &= ~(STA_FLG_RTS_MIMO_PROT_MSK | STA_FLG_MIMO_DIS_MSK); | ||
203 | |||
204 | switch (mimo_ps_mode) { | ||
205 | case WLAN_HT_CAP_SM_PS_STATIC: | ||
206 | sta_flags |= STA_FLG_MIMO_DIS_MSK; | ||
207 | break; | ||
208 | case WLAN_HT_CAP_SM_PS_DYNAMIC: | ||
209 | sta_flags |= STA_FLG_RTS_MIMO_PROT_MSK; | ||
210 | break; | ||
211 | case WLAN_HT_CAP_SM_PS_DISABLED: | ||
212 | break; | ||
213 | default: | ||
214 | IWL_WARN(priv, "Invalid MIMO PS mode %d\n", mimo_ps_mode); | ||
215 | break; | ||
216 | } | ||
217 | |||
218 | sta_flags |= cpu_to_le32( | ||
219 | (u32)sta_ht_inf->ampdu_factor << STA_FLG_MAX_AGG_SIZE_POS); | ||
220 | |||
221 | sta_flags |= cpu_to_le32( | ||
222 | (u32)sta_ht_inf->ampdu_density << STA_FLG_AGG_MPDU_DENSITY_POS); | ||
223 | |||
224 | if (iwl_is_ht40_tx_allowed(priv, ctx, &sta->ht_cap)) | ||
225 | sta_flags |= STA_FLG_HT40_EN_MSK; | ||
226 | else | ||
227 | sta_flags &= ~STA_FLG_HT40_EN_MSK; | ||
228 | |||
229 | priv->stations[index].sta.station_flags = sta_flags; | ||
230 | done: | ||
231 | return; | ||
232 | } | ||
233 | |||
234 | /** | ||
235 | * iwl_prep_station - Prepare station information for addition | ||
236 | * | ||
237 | * should be called with sta_lock held | ||
238 | */ | ||
239 | u8 iwl_prep_station(struct iwl_priv *priv, struct iwl_rxon_context *ctx, | ||
240 | const u8 *addr, bool is_ap, struct ieee80211_sta *sta) | ||
241 | { | ||
242 | struct iwl_station_entry *station; | ||
243 | int i; | ||
244 | u8 sta_id = IWL_INVALID_STATION; | ||
245 | |||
246 | if (is_ap) | ||
247 | sta_id = ctx->ap_sta_id; | ||
248 | else if (is_broadcast_ether_addr(addr)) | ||
249 | sta_id = ctx->bcast_sta_id; | ||
250 | else | ||
251 | for (i = IWL_STA_ID; i < IWLAGN_STATION_COUNT; i++) { | ||
252 | if (!compare_ether_addr(priv->stations[i].sta.sta.addr, | ||
253 | addr)) { | ||
254 | sta_id = i; | ||
255 | break; | ||
256 | } | ||
257 | |||
258 | if (!priv->stations[i].used && | ||
259 | sta_id == IWL_INVALID_STATION) | ||
260 | sta_id = i; | ||
261 | } | ||
262 | |||
263 | /* | ||
264 | * These two conditions have the same outcome, but keep them | ||
265 | * separate | ||
266 | */ | ||
267 | if (unlikely(sta_id == IWL_INVALID_STATION)) | ||
268 | return sta_id; | ||
269 | |||
270 | /* | ||
271 | * uCode is not able to deal with multiple requests to add a | ||
272 | * station. Keep track if one is in progress so that we do not send | ||
273 | * another. | ||
274 | */ | ||
275 | if (priv->stations[sta_id].used & IWL_STA_UCODE_INPROGRESS) { | ||
276 | IWL_DEBUG_INFO(priv, "STA %d already in process of being added.\n", | ||
277 | sta_id); | ||
278 | return sta_id; | ||
279 | } | ||
280 | |||
281 | if ((priv->stations[sta_id].used & IWL_STA_DRIVER_ACTIVE) && | ||
282 | (priv->stations[sta_id].used & IWL_STA_UCODE_ACTIVE) && | ||
283 | !compare_ether_addr(priv->stations[sta_id].sta.sta.addr, addr)) { | ||
284 | IWL_DEBUG_ASSOC(priv, "STA %d (%pM) already added, not adding again.\n", | ||
285 | sta_id, addr); | ||
286 | return sta_id; | ||
287 | } | ||
288 | |||
289 | station = &priv->stations[sta_id]; | ||
290 | station->used = IWL_STA_DRIVER_ACTIVE; | ||
291 | IWL_DEBUG_ASSOC(priv, "Add STA to driver ID %d: %pM\n", | ||
292 | sta_id, addr); | ||
293 | priv->num_stations++; | ||
294 | |||
295 | /* Set up the REPLY_ADD_STA command to send to device */ | ||
296 | memset(&station->sta, 0, sizeof(struct iwl_addsta_cmd)); | ||
297 | memcpy(station->sta.sta.addr, addr, ETH_ALEN); | ||
298 | station->sta.mode = 0; | ||
299 | station->sta.sta.sta_id = sta_id; | ||
300 | station->sta.station_flags = ctx->station_flags; | ||
301 | station->ctxid = ctx->ctxid; | ||
302 | |||
303 | if (sta) { | ||
304 | struct iwl_station_priv *sta_priv; | ||
305 | |||
306 | sta_priv = (void *)sta->drv_priv; | ||
307 | sta_priv->ctx = ctx; | ||
308 | } | ||
309 | |||
310 | /* | ||
311 | * OK to call unconditionally, since local stations (IBSS BSSID | ||
312 | * STA and broadcast STA) pass in a NULL sta, and mac80211 | ||
313 | * doesn't allow HT IBSS. | ||
314 | */ | ||
315 | iwl_set_ht_add_station(priv, sta_id, sta, ctx); | ||
316 | |||
317 | return sta_id; | ||
318 | |||
319 | } | ||
320 | |||
321 | #define STA_WAIT_TIMEOUT (HZ/2) | ||
322 | |||
323 | /** | ||
324 | * iwl_add_station_common - | ||
325 | */ | ||
326 | int iwl_add_station_common(struct iwl_priv *priv, struct iwl_rxon_context *ctx, | ||
327 | const u8 *addr, bool is_ap, | ||
328 | struct ieee80211_sta *sta, u8 *sta_id_r) | ||
329 | { | ||
330 | unsigned long flags_spin; | ||
331 | int ret = 0; | ||
332 | u8 sta_id; | ||
333 | struct iwl_addsta_cmd sta_cmd; | ||
334 | |||
335 | *sta_id_r = 0; | ||
336 | spin_lock_irqsave(&priv->shrd->sta_lock, flags_spin); | ||
337 | sta_id = iwl_prep_station(priv, ctx, addr, is_ap, sta); | ||
338 | if (sta_id == IWL_INVALID_STATION) { | ||
339 | IWL_ERR(priv, "Unable to prepare station %pM for addition\n", | ||
340 | addr); | ||
341 | spin_unlock_irqrestore(&priv->shrd->sta_lock, flags_spin); | ||
342 | return -EINVAL; | ||
343 | } | ||
344 | |||
345 | /* | ||
346 | * uCode is not able to deal with multiple requests to add a | ||
347 | * station. Keep track if one is in progress so that we do not send | ||
348 | * another. | ||
349 | */ | ||
350 | if (priv->stations[sta_id].used & IWL_STA_UCODE_INPROGRESS) { | ||
351 | IWL_DEBUG_INFO(priv, "STA %d already in process of being added.\n", | ||
352 | sta_id); | ||
353 | spin_unlock_irqrestore(&priv->shrd->sta_lock, flags_spin); | ||
354 | return -EEXIST; | ||
355 | } | ||
356 | |||
357 | if ((priv->stations[sta_id].used & IWL_STA_DRIVER_ACTIVE) && | ||
358 | (priv->stations[sta_id].used & IWL_STA_UCODE_ACTIVE)) { | ||
359 | IWL_DEBUG_ASSOC(priv, "STA %d (%pM) already added, not adding again.\n", | ||
360 | sta_id, addr); | ||
361 | spin_unlock_irqrestore(&priv->shrd->sta_lock, flags_spin); | ||
362 | return -EEXIST; | ||
363 | } | ||
364 | |||
365 | priv->stations[sta_id].used |= IWL_STA_UCODE_INPROGRESS; | ||
366 | memcpy(&sta_cmd, &priv->stations[sta_id].sta, sizeof(struct iwl_addsta_cmd)); | ||
367 | spin_unlock_irqrestore(&priv->shrd->sta_lock, flags_spin); | ||
368 | |||
369 | /* Add station to device's station table */ | ||
370 | ret = iwl_send_add_sta(priv, &sta_cmd, CMD_SYNC); | ||
371 | if (ret) { | ||
372 | spin_lock_irqsave(&priv->shrd->sta_lock, flags_spin); | ||
373 | IWL_ERR(priv, "Adding station %pM failed.\n", | ||
374 | priv->stations[sta_id].sta.sta.addr); | ||
375 | priv->stations[sta_id].used &= ~IWL_STA_DRIVER_ACTIVE; | ||
376 | priv->stations[sta_id].used &= ~IWL_STA_UCODE_INPROGRESS; | ||
377 | spin_unlock_irqrestore(&priv->shrd->sta_lock, flags_spin); | ||
378 | } | ||
379 | *sta_id_r = sta_id; | ||
380 | return ret; | ||
381 | } | ||
382 | |||
383 | /** | ||
384 | * iwl_sta_ucode_deactivate - deactivate ucode status for a station | ||
385 | * | ||
386 | * priv->shrd->sta_lock must be held | ||
387 | */ | ||
388 | static void iwl_sta_ucode_deactivate(struct iwl_priv *priv, u8 sta_id) | ||
389 | { | ||
390 | /* Ucode must be active and driver must be non active */ | ||
391 | if ((priv->stations[sta_id].used & | ||
392 | (IWL_STA_UCODE_ACTIVE | IWL_STA_DRIVER_ACTIVE)) != IWL_STA_UCODE_ACTIVE) | ||
393 | IWL_ERR(priv, "removed non active STA %u\n", sta_id); | ||
394 | |||
395 | priv->stations[sta_id].used &= ~IWL_STA_UCODE_ACTIVE; | ||
396 | |||
397 | memset(&priv->stations[sta_id], 0, sizeof(struct iwl_station_entry)); | ||
398 | IWL_DEBUG_ASSOC(priv, "Removed STA %u\n", sta_id); | ||
399 | } | ||
400 | |||
401 | static int iwl_send_remove_station(struct iwl_priv *priv, | ||
402 | const u8 *addr, int sta_id, | ||
403 | bool temporary) | ||
404 | { | ||
405 | struct iwl_rx_packet *pkt; | ||
406 | int ret; | ||
407 | |||
408 | unsigned long flags_spin; | ||
409 | struct iwl_rem_sta_cmd rm_sta_cmd; | ||
410 | |||
411 | struct iwl_host_cmd cmd = { | ||
412 | .id = REPLY_REMOVE_STA, | ||
413 | .len = { sizeof(struct iwl_rem_sta_cmd), }, | ||
414 | .flags = CMD_SYNC, | ||
415 | .data = { &rm_sta_cmd, }, | ||
416 | }; | ||
417 | |||
418 | memset(&rm_sta_cmd, 0, sizeof(rm_sta_cmd)); | ||
419 | rm_sta_cmd.num_sta = 1; | ||
420 | memcpy(&rm_sta_cmd.addr, addr, ETH_ALEN); | ||
421 | |||
422 | cmd.flags |= CMD_WANT_SKB; | ||
423 | |||
424 | ret = iwl_trans_send_cmd(trans(priv), &cmd); | ||
425 | |||
426 | if (ret) | ||
427 | return ret; | ||
428 | |||
429 | pkt = (struct iwl_rx_packet *)cmd.reply_page; | ||
430 | if (pkt->hdr.flags & IWL_CMD_FAILED_MSK) { | ||
431 | IWL_ERR(priv, "Bad return from REPLY_REMOVE_STA (0x%08X)\n", | ||
432 | pkt->hdr.flags); | ||
433 | ret = -EIO; | ||
434 | } | ||
435 | |||
436 | if (!ret) { | ||
437 | switch (pkt->u.rem_sta.status) { | ||
438 | case REM_STA_SUCCESS_MSK: | ||
439 | if (!temporary) { | ||
440 | spin_lock_irqsave(&priv->shrd->sta_lock, | ||
441 | flags_spin); | ||
442 | iwl_sta_ucode_deactivate(priv, sta_id); | ||
443 | spin_unlock_irqrestore(&priv->shrd->sta_lock, | ||
444 | flags_spin); | ||
445 | } | ||
446 | IWL_DEBUG_ASSOC(priv, "REPLY_REMOVE_STA PASSED\n"); | ||
447 | break; | ||
448 | default: | ||
449 | ret = -EIO; | ||
450 | IWL_ERR(priv, "REPLY_REMOVE_STA failed\n"); | ||
451 | break; | ||
452 | } | ||
453 | } | ||
454 | iwl_free_pages(priv->shrd, cmd.reply_page); | ||
455 | |||
456 | return ret; | ||
457 | } | ||
458 | |||
459 | /** | ||
460 | * iwl_remove_station - Remove driver's knowledge of station. | ||
461 | */ | ||
462 | int iwl_remove_station(struct iwl_priv *priv, const u8 sta_id, | ||
463 | const u8 *addr) | ||
464 | { | ||
465 | unsigned long flags; | ||
466 | |||
467 | if (!iwl_is_ready(priv->shrd)) { | ||
468 | IWL_DEBUG_INFO(priv, | ||
469 | "Unable to remove station %pM, device not ready.\n", | ||
470 | addr); | ||
471 | /* | ||
472 | * It is typical for stations to be removed when we are | ||
473 | * going down. Return success since device will be down | ||
474 | * soon anyway | ||
475 | */ | ||
476 | return 0; | ||
477 | } | ||
478 | |||
479 | IWL_DEBUG_ASSOC(priv, "Removing STA from driver:%d %pM\n", | ||
480 | sta_id, addr); | ||
481 | |||
482 | if (WARN_ON(sta_id == IWL_INVALID_STATION)) | ||
483 | return -EINVAL; | ||
484 | |||
485 | spin_lock_irqsave(&priv->shrd->sta_lock, flags); | ||
486 | |||
487 | if (!(priv->stations[sta_id].used & IWL_STA_DRIVER_ACTIVE)) { | ||
488 | IWL_DEBUG_INFO(priv, "Removing %pM but non DRIVER active\n", | ||
489 | addr); | ||
490 | goto out_err; | ||
491 | } | ||
492 | |||
493 | if (!(priv->stations[sta_id].used & IWL_STA_UCODE_ACTIVE)) { | ||
494 | IWL_DEBUG_INFO(priv, "Removing %pM but non UCODE active\n", | ||
495 | addr); | ||
496 | goto out_err; | ||
497 | } | ||
498 | |||
499 | if (priv->stations[sta_id].used & IWL_STA_LOCAL) { | ||
500 | kfree(priv->stations[sta_id].lq); | ||
501 | priv->stations[sta_id].lq = NULL; | ||
502 | } | ||
503 | |||
504 | priv->stations[sta_id].used &= ~IWL_STA_DRIVER_ACTIVE; | ||
505 | |||
506 | priv->num_stations--; | ||
507 | |||
508 | if (WARN_ON(priv->num_stations < 0)) | ||
509 | priv->num_stations = 0; | ||
510 | |||
511 | spin_unlock_irqrestore(&priv->shrd->sta_lock, flags); | ||
512 | |||
513 | return iwl_send_remove_station(priv, addr, sta_id, false); | ||
514 | out_err: | ||
515 | spin_unlock_irqrestore(&priv->shrd->sta_lock, flags); | ||
516 | return -EINVAL; | ||
517 | } | ||
518 | |||
519 | /** | ||
520 | * iwl_clear_ucode_stations - clear ucode station table bits | ||
521 | * | ||
522 | * This function clears all the bits in the driver indicating | ||
523 | * which stations are active in the ucode. Call when something | ||
524 | * other than explicit station management would cause this in | ||
525 | * the ucode, e.g. unassociated RXON. | ||
526 | */ | ||
527 | void iwl_clear_ucode_stations(struct iwl_priv *priv, | ||
528 | struct iwl_rxon_context *ctx) | ||
529 | { | ||
530 | int i; | ||
531 | unsigned long flags_spin; | ||
532 | bool cleared = false; | ||
533 | |||
534 | IWL_DEBUG_INFO(priv, "Clearing ucode stations in driver\n"); | ||
535 | |||
536 | spin_lock_irqsave(&priv->shrd->sta_lock, flags_spin); | ||
537 | for (i = 0; i < IWLAGN_STATION_COUNT; i++) { | ||
538 | if (ctx && ctx->ctxid != priv->stations[i].ctxid) | ||
539 | continue; | ||
540 | |||
541 | if (priv->stations[i].used & IWL_STA_UCODE_ACTIVE) { | ||
542 | IWL_DEBUG_INFO(priv, "Clearing ucode active for station %d\n", i); | ||
543 | priv->stations[i].used &= ~IWL_STA_UCODE_ACTIVE; | ||
544 | cleared = true; | ||
545 | } | ||
546 | } | ||
547 | spin_unlock_irqrestore(&priv->shrd->sta_lock, flags_spin); | ||
548 | |||
549 | if (!cleared) | ||
550 | IWL_DEBUG_INFO(priv, "No active stations found to be cleared\n"); | ||
551 | } | ||
552 | |||
553 | /** | ||
554 | * iwl_restore_stations() - Restore driver known stations to device | ||
555 | * | ||
556 | * All stations considered active by driver, but not present in ucode, is | ||
557 | * restored. | ||
558 | * | ||
559 | * Function sleeps. | ||
560 | */ | ||
561 | void iwl_restore_stations(struct iwl_priv *priv, struct iwl_rxon_context *ctx) | ||
562 | { | ||
563 | struct iwl_addsta_cmd sta_cmd; | ||
564 | struct iwl_link_quality_cmd lq; | ||
565 | unsigned long flags_spin; | ||
566 | int i; | ||
567 | bool found = false; | ||
568 | int ret; | ||
569 | bool send_lq; | ||
570 | |||
571 | if (!iwl_is_ready(priv->shrd)) { | ||
572 | IWL_DEBUG_INFO(priv, "Not ready yet, not restoring any stations.\n"); | ||
573 | return; | ||
574 | } | ||
575 | |||
576 | IWL_DEBUG_ASSOC(priv, "Restoring all known stations ... start.\n"); | ||
577 | spin_lock_irqsave(&priv->shrd->sta_lock, flags_spin); | ||
578 | for (i = 0; i < IWLAGN_STATION_COUNT; i++) { | ||
579 | if (ctx->ctxid != priv->stations[i].ctxid) | ||
580 | continue; | ||
581 | if ((priv->stations[i].used & IWL_STA_DRIVER_ACTIVE) && | ||
582 | !(priv->stations[i].used & IWL_STA_UCODE_ACTIVE)) { | ||
583 | IWL_DEBUG_ASSOC(priv, "Restoring sta %pM\n", | ||
584 | priv->stations[i].sta.sta.addr); | ||
585 | priv->stations[i].sta.mode = 0; | ||
586 | priv->stations[i].used |= IWL_STA_UCODE_INPROGRESS; | ||
587 | found = true; | ||
588 | } | ||
589 | } | ||
590 | |||
591 | for (i = 0; i < IWLAGN_STATION_COUNT; i++) { | ||
592 | if ((priv->stations[i].used & IWL_STA_UCODE_INPROGRESS)) { | ||
593 | memcpy(&sta_cmd, &priv->stations[i].sta, | ||
594 | sizeof(struct iwl_addsta_cmd)); | ||
595 | send_lq = false; | ||
596 | if (priv->stations[i].lq) { | ||
597 | if (priv->shrd->wowlan) | ||
598 | iwl_sta_fill_lq(priv, ctx, i, &lq); | ||
599 | else | ||
600 | memcpy(&lq, priv->stations[i].lq, | ||
601 | sizeof(struct iwl_link_quality_cmd)); | ||
602 | send_lq = true; | ||
603 | } | ||
604 | spin_unlock_irqrestore(&priv->shrd->sta_lock, | ||
605 | flags_spin); | ||
606 | ret = iwl_send_add_sta(priv, &sta_cmd, CMD_SYNC); | ||
607 | if (ret) { | ||
608 | spin_lock_irqsave(&priv->shrd->sta_lock, | ||
609 | flags_spin); | ||
610 | IWL_ERR(priv, "Adding station %pM failed.\n", | ||
611 | priv->stations[i].sta.sta.addr); | ||
612 | priv->stations[i].used &= ~IWL_STA_DRIVER_ACTIVE; | ||
613 | priv->stations[i].used &= ~IWL_STA_UCODE_INPROGRESS; | ||
614 | spin_unlock_irqrestore(&priv->shrd->sta_lock, | ||
615 | flags_spin); | ||
616 | } | ||
617 | /* | ||
618 | * Rate scaling has already been initialized, send | ||
619 | * current LQ command | ||
620 | */ | ||
621 | if (send_lq) | ||
622 | iwl_send_lq_cmd(priv, ctx, &lq, CMD_SYNC, true); | ||
623 | spin_lock_irqsave(&priv->shrd->sta_lock, flags_spin); | ||
624 | priv->stations[i].used &= ~IWL_STA_UCODE_INPROGRESS; | ||
625 | } | ||
626 | } | ||
627 | |||
628 | spin_unlock_irqrestore(&priv->shrd->sta_lock, flags_spin); | ||
629 | if (!found) | ||
630 | IWL_DEBUG_INFO(priv, "Restoring all known stations .... no stations to be restored.\n"); | ||
631 | else | ||
632 | IWL_DEBUG_INFO(priv, "Restoring all known stations .... complete.\n"); | ||
633 | } | ||
634 | |||
635 | void iwl_reprogram_ap_sta(struct iwl_priv *priv, struct iwl_rxon_context *ctx) | ||
636 | { | ||
637 | unsigned long flags; | ||
638 | int sta_id = ctx->ap_sta_id; | ||
639 | int ret; | ||
640 | struct iwl_addsta_cmd sta_cmd; | ||
641 | struct iwl_link_quality_cmd lq; | ||
642 | bool active; | ||
643 | |||
644 | spin_lock_irqsave(&priv->shrd->sta_lock, flags); | ||
645 | if (!(priv->stations[sta_id].used & IWL_STA_DRIVER_ACTIVE)) { | ||
646 | spin_unlock_irqrestore(&priv->shrd->sta_lock, flags); | ||
647 | return; | ||
648 | } | ||
649 | |||
650 | memcpy(&sta_cmd, &priv->stations[sta_id].sta, sizeof(sta_cmd)); | ||
651 | sta_cmd.mode = 0; | ||
652 | memcpy(&lq, priv->stations[sta_id].lq, sizeof(lq)); | ||
653 | |||
654 | active = priv->stations[sta_id].used & IWL_STA_UCODE_ACTIVE; | ||
655 | priv->stations[sta_id].used &= ~IWL_STA_DRIVER_ACTIVE; | ||
656 | spin_unlock_irqrestore(&priv->shrd->sta_lock, flags); | ||
657 | |||
658 | if (active) { | ||
659 | ret = iwl_send_remove_station( | ||
660 | priv, priv->stations[sta_id].sta.sta.addr, | ||
661 | sta_id, true); | ||
662 | if (ret) | ||
663 | IWL_ERR(priv, "failed to remove STA %pM (%d)\n", | ||
664 | priv->stations[sta_id].sta.sta.addr, ret); | ||
665 | } | ||
666 | spin_lock_irqsave(&priv->shrd->sta_lock, flags); | ||
667 | priv->stations[sta_id].used |= IWL_STA_DRIVER_ACTIVE; | ||
668 | spin_unlock_irqrestore(&priv->shrd->sta_lock, flags); | ||
669 | |||
670 | ret = iwl_send_add_sta(priv, &sta_cmd, CMD_SYNC); | ||
671 | if (ret) | ||
672 | IWL_ERR(priv, "failed to re-add STA %pM (%d)\n", | ||
673 | priv->stations[sta_id].sta.sta.addr, ret); | ||
674 | iwl_send_lq_cmd(priv, ctx, &lq, CMD_SYNC, true); | ||
675 | } | ||
676 | |||
677 | int iwl_get_free_ucode_key_offset(struct iwl_priv *priv) | ||
678 | { | ||
679 | int i; | ||
680 | |||
681 | for (i = 0; i < priv->sta_key_max_num; i++) | ||
682 | if (!test_and_set_bit(i, &priv->ucode_key_table)) | ||
683 | return i; | ||
684 | |||
685 | return WEP_INVALID_OFFSET; | ||
686 | } | ||
687 | |||
688 | void iwl_dealloc_bcast_stations(struct iwl_priv *priv) | ||
689 | { | ||
690 | unsigned long flags; | ||
691 | int i; | ||
692 | |||
693 | spin_lock_irqsave(&priv->shrd->sta_lock, flags); | ||
694 | for (i = 0; i < IWLAGN_STATION_COUNT; i++) { | ||
695 | if (!(priv->stations[i].used & IWL_STA_BCAST)) | ||
696 | continue; | ||
697 | |||
698 | priv->stations[i].used &= ~IWL_STA_UCODE_ACTIVE; | ||
699 | priv->num_stations--; | ||
700 | if (WARN_ON(priv->num_stations < 0)) | ||
701 | priv->num_stations = 0; | ||
702 | kfree(priv->stations[i].lq); | ||
703 | priv->stations[i].lq = NULL; | ||
704 | } | ||
705 | spin_unlock_irqrestore(&priv->shrd->sta_lock, flags); | ||
706 | } | ||
707 | |||
708 | #ifdef CONFIG_IWLWIFI_DEBUG | ||
709 | static void iwl_dump_lq_cmd(struct iwl_priv *priv, | ||
710 | struct iwl_link_quality_cmd *lq) | ||
711 | { | ||
712 | int i; | ||
713 | IWL_DEBUG_RATE(priv, "lq station id 0x%x\n", lq->sta_id); | ||
714 | IWL_DEBUG_RATE(priv, "lq ant 0x%X 0x%X\n", | ||
715 | lq->general_params.single_stream_ant_msk, | ||
716 | lq->general_params.dual_stream_ant_msk); | ||
717 | |||
718 | for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++) | ||
719 | IWL_DEBUG_RATE(priv, "lq index %d 0x%X\n", | ||
720 | i, lq->rs_table[i].rate_n_flags); | ||
721 | } | ||
722 | #else | ||
723 | static inline void iwl_dump_lq_cmd(struct iwl_priv *priv, | ||
724 | struct iwl_link_quality_cmd *lq) | ||
725 | { | ||
726 | } | ||
727 | #endif | ||
728 | |||
729 | /** | ||
730 | * is_lq_table_valid() - Test one aspect of LQ cmd for validity | ||
731 | * | ||
732 | * It sometimes happens when a HT rate has been in use and we | ||
733 | * loose connectivity with AP then mac80211 will first tell us that the | ||
734 | * current channel is not HT anymore before removing the station. In such a | ||
735 | * scenario the RXON flags will be updated to indicate we are not | ||
736 | * communicating HT anymore, but the LQ command may still contain HT rates. | ||
737 | * Test for this to prevent driver from sending LQ command between the time | ||
738 | * RXON flags are updated and when LQ command is updated. | ||
739 | */ | ||
740 | static bool is_lq_table_valid(struct iwl_priv *priv, | ||
741 | struct iwl_rxon_context *ctx, | ||
742 | struct iwl_link_quality_cmd *lq) | ||
743 | { | ||
744 | int i; | ||
745 | |||
746 | if (ctx->ht.enabled) | ||
747 | return true; | ||
748 | |||
749 | IWL_DEBUG_INFO(priv, "Channel %u is not an HT channel\n", | ||
750 | ctx->active.channel); | ||
751 | for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++) { | ||
752 | if (le32_to_cpu(lq->rs_table[i].rate_n_flags) & RATE_MCS_HT_MSK) { | ||
753 | IWL_DEBUG_INFO(priv, | ||
754 | "index %d of LQ expects HT channel\n", | ||
755 | i); | ||
756 | return false; | ||
757 | } | ||
758 | } | ||
759 | return true; | ||
760 | } | ||
761 | |||
762 | /** | ||
763 | * iwl_send_lq_cmd() - Send link quality command | ||
764 | * @init: This command is sent as part of station initialization right | ||
765 | * after station has been added. | ||
766 | * | ||
767 | * The link quality command is sent as the last step of station creation. | ||
768 | * This is the special case in which init is set and we call a callback in | ||
769 | * this case to clear the state indicating that station creation is in | ||
770 | * progress. | ||
771 | */ | ||
772 | int iwl_send_lq_cmd(struct iwl_priv *priv, struct iwl_rxon_context *ctx, | ||
773 | struct iwl_link_quality_cmd *lq, u8 flags, bool init) | ||
774 | { | ||
775 | int ret = 0; | ||
776 | unsigned long flags_spin; | ||
777 | |||
778 | struct iwl_host_cmd cmd = { | ||
779 | .id = REPLY_TX_LINK_QUALITY_CMD, | ||
780 | .len = { sizeof(struct iwl_link_quality_cmd), }, | ||
781 | .flags = flags, | ||
782 | .data = { lq, }, | ||
783 | }; | ||
784 | |||
785 | if (WARN_ON(lq->sta_id == IWL_INVALID_STATION)) | ||
786 | return -EINVAL; | ||
787 | |||
788 | |||
789 | spin_lock_irqsave(&priv->shrd->sta_lock, flags_spin); | ||
790 | if (!(priv->stations[lq->sta_id].used & IWL_STA_DRIVER_ACTIVE)) { | ||
791 | spin_unlock_irqrestore(&priv->shrd->sta_lock, flags_spin); | ||
792 | return -EINVAL; | ||
793 | } | ||
794 | spin_unlock_irqrestore(&priv->shrd->sta_lock, flags_spin); | ||
795 | |||
796 | iwl_dump_lq_cmd(priv, lq); | ||
797 | if (WARN_ON(init && (cmd.flags & CMD_ASYNC))) | ||
798 | return -EINVAL; | ||
799 | |||
800 | if (is_lq_table_valid(priv, ctx, lq)) | ||
801 | ret = iwl_trans_send_cmd(trans(priv), &cmd); | ||
802 | else | ||
803 | ret = -EINVAL; | ||
804 | |||
805 | if (cmd.flags & CMD_ASYNC) | ||
806 | return ret; | ||
807 | |||
808 | if (init) { | ||
809 | IWL_DEBUG_INFO(priv, "init LQ command complete, clearing sta addition status for sta %d\n", | ||
810 | lq->sta_id); | ||
811 | spin_lock_irqsave(&priv->shrd->sta_lock, flags_spin); | ||
812 | priv->stations[lq->sta_id].used &= ~IWL_STA_UCODE_INPROGRESS; | ||
813 | spin_unlock_irqrestore(&priv->shrd->sta_lock, flags_spin); | ||
814 | } | ||
815 | return ret; | ||
816 | } | ||
817 | |||
818 | int iwlagn_mac_sta_remove(struct ieee80211_hw *hw, | ||
819 | struct ieee80211_vif *vif, | ||
820 | struct ieee80211_sta *sta) | ||
821 | { | ||
822 | struct iwl_priv *priv = hw->priv; | ||
823 | struct iwl_station_priv *sta_priv = (void *)sta->drv_priv; | ||
824 | int ret; | ||
825 | |||
826 | IWL_DEBUG_MAC80211(priv, "enter: received request to remove " | ||
827 | "station %pM\n", sta->addr); | ||
828 | mutex_lock(&priv->shrd->mutex); | ||
829 | IWL_DEBUG_INFO(priv, "proceeding to remove station %pM\n", | ||
830 | sta->addr); | ||
831 | ret = iwl_remove_station(priv, sta_priv->sta_id, sta->addr); | ||
832 | if (ret) | ||
833 | IWL_ERR(priv, "Error removing station %pM\n", | ||
834 | sta->addr); | ||
835 | mutex_unlock(&priv->shrd->mutex); | ||
836 | IWL_DEBUG_MAC80211(priv, "leave\n"); | ||
837 | |||
838 | return ret; | ||
839 | } | ||