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[mirror_ubuntu-zesty-kernel.git] / drivers / net / wireless / iwlwifi / dvm / lib.c
1 /******************************************************************************
2 *
3 * GPL LICENSE SUMMARY
4 *
5 * Copyright(c) 2008 - 2014 Intel Corporation. All rights reserved.
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of version 2 of the GNU General Public License as
9 * published by the Free Software Foundation.
10 *
11 * This program is distributed in the hope that it will be useful, but
12 * WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
19 * USA
20 *
21 * The full GNU General Public License is included in this distribution
22 * in the file called COPYING.
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 #include <linux/etherdevice.h>
30 #include <linux/kernel.h>
31 #include <linux/module.h>
32 #include <linux/sched.h>
33 #include <net/mac80211.h>
34
35 #include "iwl-io.h"
36 #include "iwl-agn-hw.h"
37 #include "iwl-trans.h"
38 #include "iwl-modparams.h"
39
40 #include "dev.h"
41 #include "agn.h"
42
43 int iwlagn_hw_valid_rtc_data_addr(u32 addr)
44 {
45 return (addr >= IWLAGN_RTC_DATA_LOWER_BOUND) &&
46 (addr < IWLAGN_RTC_DATA_UPPER_BOUND);
47 }
48
49 int iwlagn_send_tx_power(struct iwl_priv *priv)
50 {
51 struct iwlagn_tx_power_dbm_cmd tx_power_cmd;
52 u8 tx_ant_cfg_cmd;
53
54 if (WARN_ONCE(test_bit(STATUS_SCAN_HW, &priv->status),
55 "TX Power requested while scanning!\n"))
56 return -EAGAIN;
57
58 /* half dBm need to multiply */
59 tx_power_cmd.global_lmt = (s8)(2 * priv->tx_power_user_lmt);
60
61 if (tx_power_cmd.global_lmt > priv->nvm_data->max_tx_pwr_half_dbm) {
62 /*
63 * For the newer devices which using enhanced/extend tx power
64 * table in EEPROM, the format is in half dBm. driver need to
65 * convert to dBm format before report to mac80211.
66 * By doing so, there is a possibility of 1/2 dBm resolution
67 * lost. driver will perform "round-up" operation before
68 * reporting, but it will cause 1/2 dBm tx power over the
69 * regulatory limit. Perform the checking here, if the
70 * "tx_power_user_lmt" is higher than EEPROM value (in
71 * half-dBm format), lower the tx power based on EEPROM
72 */
73 tx_power_cmd.global_lmt =
74 priv->nvm_data->max_tx_pwr_half_dbm;
75 }
76 tx_power_cmd.flags = IWLAGN_TX_POWER_NO_CLOSED;
77 tx_power_cmd.srv_chan_lmt = IWLAGN_TX_POWER_AUTO;
78
79 if (IWL_UCODE_API(priv->fw->ucode_ver) == 1)
80 tx_ant_cfg_cmd = REPLY_TX_POWER_DBM_CMD_V1;
81 else
82 tx_ant_cfg_cmd = REPLY_TX_POWER_DBM_CMD;
83
84 return iwl_dvm_send_cmd_pdu(priv, tx_ant_cfg_cmd, 0,
85 sizeof(tx_power_cmd), &tx_power_cmd);
86 }
87
88 void iwlagn_temperature(struct iwl_priv *priv)
89 {
90 lockdep_assert_held(&priv->statistics.lock);
91
92 /* store temperature from correct statistics (in Celsius) */
93 priv->temperature = le32_to_cpu(priv->statistics.common.temperature);
94 iwl_tt_handler(priv);
95 }
96
97 int iwlagn_hwrate_to_mac80211_idx(u32 rate_n_flags, enum ieee80211_band band)
98 {
99 int idx = 0;
100 int band_offset = 0;
101
102 /* HT rate format: mac80211 wants an MCS number, which is just LSB */
103 if (rate_n_flags & RATE_MCS_HT_MSK) {
104 idx = (rate_n_flags & 0xff);
105 return idx;
106 /* Legacy rate format, search for match in table */
107 } else {
108 if (band == IEEE80211_BAND_5GHZ)
109 band_offset = IWL_FIRST_OFDM_RATE;
110 for (idx = band_offset; idx < IWL_RATE_COUNT_LEGACY; idx++)
111 if (iwl_rates[idx].plcp == (rate_n_flags & 0xFF))
112 return idx - band_offset;
113 }
114
115 return -1;
116 }
117
118 int iwlagn_manage_ibss_station(struct iwl_priv *priv,
119 struct ieee80211_vif *vif, bool add)
120 {
121 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
122
123 if (add)
124 return iwlagn_add_bssid_station(priv, vif_priv->ctx,
125 vif->bss_conf.bssid,
126 &vif_priv->ibss_bssid_sta_id);
127 return iwl_remove_station(priv, vif_priv->ibss_bssid_sta_id,
128 vif->bss_conf.bssid);
129 }
130
131 /**
132 * iwlagn_txfifo_flush: send REPLY_TXFIFO_FLUSH command to uCode
133 *
134 * pre-requirements:
135 * 1. acquire mutex before calling
136 * 2. make sure rf is on and not in exit state
137 */
138 int iwlagn_txfifo_flush(struct iwl_priv *priv, u32 scd_q_msk)
139 {
140 struct iwl_txfifo_flush_cmd_v3 flush_cmd_v3 = {
141 .flush_control = cpu_to_le16(IWL_DROP_ALL),
142 };
143 struct iwl_txfifo_flush_cmd_v2 flush_cmd_v2 = {
144 .flush_control = cpu_to_le16(IWL_DROP_ALL),
145 };
146
147 u32 queue_control = IWL_SCD_VO_MSK | IWL_SCD_VI_MSK |
148 IWL_SCD_BE_MSK | IWL_SCD_BK_MSK | IWL_SCD_MGMT_MSK;
149
150 if ((priv->valid_contexts != BIT(IWL_RXON_CTX_BSS)))
151 queue_control |= IWL_PAN_SCD_VO_MSK | IWL_PAN_SCD_VI_MSK |
152 IWL_PAN_SCD_BE_MSK | IWL_PAN_SCD_BK_MSK |
153 IWL_PAN_SCD_MGMT_MSK |
154 IWL_PAN_SCD_MULTICAST_MSK;
155
156 if (priv->nvm_data->sku_cap_11n_enable)
157 queue_control |= IWL_AGG_TX_QUEUE_MSK;
158
159 if (scd_q_msk)
160 queue_control = scd_q_msk;
161
162 IWL_DEBUG_INFO(priv, "queue control: 0x%x\n", queue_control);
163 flush_cmd_v3.queue_control = cpu_to_le32(queue_control);
164 flush_cmd_v2.queue_control = cpu_to_le16((u16)queue_control);
165
166 if (IWL_UCODE_API(priv->fw->ucode_ver) > 2)
167 return iwl_dvm_send_cmd_pdu(priv, REPLY_TXFIFO_FLUSH, 0,
168 sizeof(flush_cmd_v3),
169 &flush_cmd_v3);
170 return iwl_dvm_send_cmd_pdu(priv, REPLY_TXFIFO_FLUSH, 0,
171 sizeof(flush_cmd_v2), &flush_cmd_v2);
172 }
173
174 void iwlagn_dev_txfifo_flush(struct iwl_priv *priv)
175 {
176 mutex_lock(&priv->mutex);
177 ieee80211_stop_queues(priv->hw);
178 if (iwlagn_txfifo_flush(priv, 0)) {
179 IWL_ERR(priv, "flush request fail\n");
180 goto done;
181 }
182 IWL_DEBUG_INFO(priv, "wait transmit/flush all frames\n");
183 iwl_trans_wait_tx_queue_empty(priv->trans, 0xffffffff);
184 done:
185 ieee80211_wake_queues(priv->hw);
186 mutex_unlock(&priv->mutex);
187 }
188
189 /*
190 * BT coex
191 */
192 /* Notmal TDM */
193 static const __le32 iwlagn_def_3w_lookup[IWLAGN_BT_DECISION_LUT_SIZE] = {
194 cpu_to_le32(0xaaaaaaaa),
195 cpu_to_le32(0xaaaaaaaa),
196 cpu_to_le32(0xaeaaaaaa),
197 cpu_to_le32(0xaaaaaaaa),
198 cpu_to_le32(0xcc00ff28),
199 cpu_to_le32(0x0000aaaa),
200 cpu_to_le32(0xcc00aaaa),
201 cpu_to_le32(0x0000aaaa),
202 cpu_to_le32(0xc0004000),
203 cpu_to_le32(0x00004000),
204 cpu_to_le32(0xf0005000),
205 cpu_to_le32(0xf0005000),
206 };
207
208
209 /* Loose Coex */
210 static const __le32 iwlagn_loose_lookup[IWLAGN_BT_DECISION_LUT_SIZE] = {
211 cpu_to_le32(0xaaaaaaaa),
212 cpu_to_le32(0xaaaaaaaa),
213 cpu_to_le32(0xaeaaaaaa),
214 cpu_to_le32(0xaaaaaaaa),
215 cpu_to_le32(0xcc00ff28),
216 cpu_to_le32(0x0000aaaa),
217 cpu_to_le32(0xcc00aaaa),
218 cpu_to_le32(0x0000aaaa),
219 cpu_to_le32(0x00000000),
220 cpu_to_le32(0x00000000),
221 cpu_to_le32(0xf0005000),
222 cpu_to_le32(0xf0005000),
223 };
224
225 /* Full concurrency */
226 static const __le32 iwlagn_concurrent_lookup[IWLAGN_BT_DECISION_LUT_SIZE] = {
227 cpu_to_le32(0xaaaaaaaa),
228 cpu_to_le32(0xaaaaaaaa),
229 cpu_to_le32(0xaaaaaaaa),
230 cpu_to_le32(0xaaaaaaaa),
231 cpu_to_le32(0xaaaaaaaa),
232 cpu_to_le32(0xaaaaaaaa),
233 cpu_to_le32(0xaaaaaaaa),
234 cpu_to_le32(0xaaaaaaaa),
235 cpu_to_le32(0x00000000),
236 cpu_to_le32(0x00000000),
237 cpu_to_le32(0x00000000),
238 cpu_to_le32(0x00000000),
239 };
240
241 void iwlagn_send_advance_bt_config(struct iwl_priv *priv)
242 {
243 struct iwl_basic_bt_cmd basic = {
244 .max_kill = IWLAGN_BT_MAX_KILL_DEFAULT,
245 .bt3_timer_t7_value = IWLAGN_BT3_T7_DEFAULT,
246 .bt3_prio_sample_time = IWLAGN_BT3_PRIO_SAMPLE_DEFAULT,
247 .bt3_timer_t2_value = IWLAGN_BT3_T2_DEFAULT,
248 };
249 struct iwl_bt_cmd_v1 bt_cmd_v1;
250 struct iwl_bt_cmd_v2 bt_cmd_v2;
251 int ret;
252
253 BUILD_BUG_ON(sizeof(iwlagn_def_3w_lookup) !=
254 sizeof(basic.bt3_lookup_table));
255
256 if (priv->lib->bt_params) {
257 /*
258 * newer generation of devices (2000 series and newer)
259 * use the version 2 of the bt command
260 * we need to make sure sending the host command
261 * with correct data structure to avoid uCode assert
262 */
263 if (priv->lib->bt_params->bt_session_2) {
264 bt_cmd_v2.prio_boost = cpu_to_le32(
265 priv->lib->bt_params->bt_prio_boost);
266 bt_cmd_v2.tx_prio_boost = 0;
267 bt_cmd_v2.rx_prio_boost = 0;
268 } else {
269 /* older version only has 8 bits */
270 WARN_ON(priv->lib->bt_params->bt_prio_boost & ~0xFF);
271 bt_cmd_v1.prio_boost =
272 priv->lib->bt_params->bt_prio_boost;
273 bt_cmd_v1.tx_prio_boost = 0;
274 bt_cmd_v1.rx_prio_boost = 0;
275 }
276 } else {
277 IWL_ERR(priv, "failed to construct BT Coex Config\n");
278 return;
279 }
280
281 /*
282 * Possible situations when BT needs to take over for receive,
283 * at the same time where STA needs to response to AP's frame(s),
284 * reduce the tx power of the required response frames, by that,
285 * allow the concurrent BT receive & WiFi transmit
286 * (BT - ANT A, WiFi -ANT B), without interference to one another
287 *
288 * Reduced tx power apply to control frames only (ACK/Back/CTS)
289 * when indicated by the BT config command
290 */
291 basic.kill_ack_mask = priv->kill_ack_mask;
292 basic.kill_cts_mask = priv->kill_cts_mask;
293 if (priv->reduced_txpower)
294 basic.reduce_txpower = IWLAGN_BT_REDUCED_TX_PWR;
295 basic.valid = priv->bt_valid;
296
297 /*
298 * Configure BT coex mode to "no coexistence" when the
299 * user disabled BT coexistence, we have no interface
300 * (might be in monitor mode), or the interface is in
301 * IBSS mode (no proper uCode support for coex then).
302 */
303 if (!iwlwifi_mod_params.bt_coex_active ||
304 priv->iw_mode == NL80211_IFTYPE_ADHOC) {
305 basic.flags = IWLAGN_BT_FLAG_COEX_MODE_DISABLED;
306 } else {
307 basic.flags = IWLAGN_BT_FLAG_COEX_MODE_3W <<
308 IWLAGN_BT_FLAG_COEX_MODE_SHIFT;
309
310 if (!priv->bt_enable_pspoll)
311 basic.flags |= IWLAGN_BT_FLAG_SYNC_2_BT_DISABLE;
312 else
313 basic.flags &= ~IWLAGN_BT_FLAG_SYNC_2_BT_DISABLE;
314
315 if (priv->bt_ch_announce)
316 basic.flags |= IWLAGN_BT_FLAG_CHANNEL_INHIBITION;
317 IWL_DEBUG_COEX(priv, "BT coex flag: 0X%x\n", basic.flags);
318 }
319 priv->bt_enable_flag = basic.flags;
320 if (priv->bt_full_concurrent)
321 memcpy(basic.bt3_lookup_table, iwlagn_concurrent_lookup,
322 sizeof(iwlagn_concurrent_lookup));
323 else
324 memcpy(basic.bt3_lookup_table, iwlagn_def_3w_lookup,
325 sizeof(iwlagn_def_3w_lookup));
326
327 IWL_DEBUG_COEX(priv, "BT coex %s in %s mode\n",
328 basic.flags ? "active" : "disabled",
329 priv->bt_full_concurrent ?
330 "full concurrency" : "3-wire");
331
332 if (priv->lib->bt_params->bt_session_2) {
333 memcpy(&bt_cmd_v2.basic, &basic,
334 sizeof(basic));
335 ret = iwl_dvm_send_cmd_pdu(priv, REPLY_BT_CONFIG,
336 0, sizeof(bt_cmd_v2), &bt_cmd_v2);
337 } else {
338 memcpy(&bt_cmd_v1.basic, &basic,
339 sizeof(basic));
340 ret = iwl_dvm_send_cmd_pdu(priv, REPLY_BT_CONFIG,
341 0, sizeof(bt_cmd_v1), &bt_cmd_v1);
342 }
343 if (ret)
344 IWL_ERR(priv, "failed to send BT Coex Config\n");
345
346 }
347
348 void iwlagn_bt_adjust_rssi_monitor(struct iwl_priv *priv, bool rssi_ena)
349 {
350 struct iwl_rxon_context *ctx, *found_ctx = NULL;
351 bool found_ap = false;
352
353 lockdep_assert_held(&priv->mutex);
354
355 /* Check whether AP or GO mode is active. */
356 if (rssi_ena) {
357 for_each_context(priv, ctx) {
358 if (ctx->vif && ctx->vif->type == NL80211_IFTYPE_AP &&
359 iwl_is_associated_ctx(ctx)) {
360 found_ap = true;
361 break;
362 }
363 }
364 }
365
366 /*
367 * If disable was received or If GO/AP mode, disable RSSI
368 * measurements.
369 */
370 if (!rssi_ena || found_ap) {
371 if (priv->cur_rssi_ctx) {
372 ctx = priv->cur_rssi_ctx;
373 ieee80211_disable_rssi_reports(ctx->vif);
374 priv->cur_rssi_ctx = NULL;
375 }
376 return;
377 }
378
379 /*
380 * If rssi measurements need to be enabled, consider all cases now.
381 * Figure out how many contexts are active.
382 */
383 for_each_context(priv, ctx) {
384 if (ctx->vif && ctx->vif->type == NL80211_IFTYPE_STATION &&
385 iwl_is_associated_ctx(ctx)) {
386 found_ctx = ctx;
387 break;
388 }
389 }
390
391 /*
392 * rssi monitor already enabled for the correct interface...nothing
393 * to do.
394 */
395 if (found_ctx == priv->cur_rssi_ctx)
396 return;
397
398 /*
399 * Figure out if rssi monitor is currently enabled, and needs
400 * to be changed. If rssi monitor is already enabled, disable
401 * it first else just enable rssi measurements on the
402 * interface found above.
403 */
404 if (priv->cur_rssi_ctx) {
405 ctx = priv->cur_rssi_ctx;
406 if (ctx->vif)
407 ieee80211_disable_rssi_reports(ctx->vif);
408 }
409
410 priv->cur_rssi_ctx = found_ctx;
411
412 if (!found_ctx)
413 return;
414
415 ieee80211_enable_rssi_reports(found_ctx->vif,
416 IWLAGN_BT_PSP_MIN_RSSI_THRESHOLD,
417 IWLAGN_BT_PSP_MAX_RSSI_THRESHOLD);
418 }
419
420 static bool iwlagn_bt_traffic_is_sco(struct iwl_bt_uart_msg *uart_msg)
421 {
422 return (BT_UART_MSG_FRAME3SCOESCO_MSK & uart_msg->frame3) >>
423 BT_UART_MSG_FRAME3SCOESCO_POS;
424 }
425
426 static void iwlagn_bt_traffic_change_work(struct work_struct *work)
427 {
428 struct iwl_priv *priv =
429 container_of(work, struct iwl_priv, bt_traffic_change_work);
430 struct iwl_rxon_context *ctx;
431 int smps_request = -1;
432
433 if (priv->bt_enable_flag == IWLAGN_BT_FLAG_COEX_MODE_DISABLED) {
434 /* bt coex disabled */
435 return;
436 }
437
438 /*
439 * Note: bt_traffic_load can be overridden by scan complete and
440 * coex profile notifications. Ignore that since only bad consequence
441 * can be not matching debug print with actual state.
442 */
443 IWL_DEBUG_COEX(priv, "BT traffic load changes: %d\n",
444 priv->bt_traffic_load);
445
446 switch (priv->bt_traffic_load) {
447 case IWL_BT_COEX_TRAFFIC_LOAD_NONE:
448 if (priv->bt_status)
449 smps_request = IEEE80211_SMPS_DYNAMIC;
450 else
451 smps_request = IEEE80211_SMPS_AUTOMATIC;
452 break;
453 case IWL_BT_COEX_TRAFFIC_LOAD_LOW:
454 smps_request = IEEE80211_SMPS_DYNAMIC;
455 break;
456 case IWL_BT_COEX_TRAFFIC_LOAD_HIGH:
457 case IWL_BT_COEX_TRAFFIC_LOAD_CONTINUOUS:
458 smps_request = IEEE80211_SMPS_STATIC;
459 break;
460 default:
461 IWL_ERR(priv, "Invalid BT traffic load: %d\n",
462 priv->bt_traffic_load);
463 break;
464 }
465
466 mutex_lock(&priv->mutex);
467
468 /*
469 * We can not send command to firmware while scanning. When the scan
470 * complete we will schedule this work again. We do check with mutex
471 * locked to prevent new scan request to arrive. We do not check
472 * STATUS_SCANNING to avoid race when queue_work two times from
473 * different notifications, but quit and not perform any work at all.
474 */
475 if (test_bit(STATUS_SCAN_HW, &priv->status))
476 goto out;
477
478 iwl_update_chain_flags(priv);
479
480 if (smps_request != -1) {
481 priv->current_ht_config.smps = smps_request;
482 for_each_context(priv, ctx) {
483 if (ctx->vif && ctx->vif->type == NL80211_IFTYPE_STATION)
484 ieee80211_request_smps(ctx->vif, smps_request);
485 }
486 }
487
488 /*
489 * Dynamic PS poll related functionality. Adjust RSSI measurements if
490 * necessary.
491 */
492 iwlagn_bt_coex_rssi_monitor(priv);
493 out:
494 mutex_unlock(&priv->mutex);
495 }
496
497 /*
498 * If BT sco traffic, and RSSI monitor is enabled, move measurements to the
499 * correct interface or disable it if this is the last interface to be
500 * removed.
501 */
502 void iwlagn_bt_coex_rssi_monitor(struct iwl_priv *priv)
503 {
504 if (priv->bt_is_sco &&
505 priv->bt_traffic_load == IWL_BT_COEX_TRAFFIC_LOAD_CONTINUOUS)
506 iwlagn_bt_adjust_rssi_monitor(priv, true);
507 else
508 iwlagn_bt_adjust_rssi_monitor(priv, false);
509 }
510
511 static void iwlagn_print_uartmsg(struct iwl_priv *priv,
512 struct iwl_bt_uart_msg *uart_msg)
513 {
514 IWL_DEBUG_COEX(priv, "Message Type = 0x%X, SSN = 0x%X, "
515 "Update Req = 0x%X\n",
516 (BT_UART_MSG_FRAME1MSGTYPE_MSK & uart_msg->frame1) >>
517 BT_UART_MSG_FRAME1MSGTYPE_POS,
518 (BT_UART_MSG_FRAME1SSN_MSK & uart_msg->frame1) >>
519 BT_UART_MSG_FRAME1SSN_POS,
520 (BT_UART_MSG_FRAME1UPDATEREQ_MSK & uart_msg->frame1) >>
521 BT_UART_MSG_FRAME1UPDATEREQ_POS);
522
523 IWL_DEBUG_COEX(priv, "Open connections = 0x%X, Traffic load = 0x%X, "
524 "Chl_SeqN = 0x%X, In band = 0x%X\n",
525 (BT_UART_MSG_FRAME2OPENCONNECTIONS_MSK & uart_msg->frame2) >>
526 BT_UART_MSG_FRAME2OPENCONNECTIONS_POS,
527 (BT_UART_MSG_FRAME2TRAFFICLOAD_MSK & uart_msg->frame2) >>
528 BT_UART_MSG_FRAME2TRAFFICLOAD_POS,
529 (BT_UART_MSG_FRAME2CHLSEQN_MSK & uart_msg->frame2) >>
530 BT_UART_MSG_FRAME2CHLSEQN_POS,
531 (BT_UART_MSG_FRAME2INBAND_MSK & uart_msg->frame2) >>
532 BT_UART_MSG_FRAME2INBAND_POS);
533
534 IWL_DEBUG_COEX(priv, "SCO/eSCO = 0x%X, Sniff = 0x%X, A2DP = 0x%X, "
535 "ACL = 0x%X, Master = 0x%X, OBEX = 0x%X\n",
536 (BT_UART_MSG_FRAME3SCOESCO_MSK & uart_msg->frame3) >>
537 BT_UART_MSG_FRAME3SCOESCO_POS,
538 (BT_UART_MSG_FRAME3SNIFF_MSK & uart_msg->frame3) >>
539 BT_UART_MSG_FRAME3SNIFF_POS,
540 (BT_UART_MSG_FRAME3A2DP_MSK & uart_msg->frame3) >>
541 BT_UART_MSG_FRAME3A2DP_POS,
542 (BT_UART_MSG_FRAME3ACL_MSK & uart_msg->frame3) >>
543 BT_UART_MSG_FRAME3ACL_POS,
544 (BT_UART_MSG_FRAME3MASTER_MSK & uart_msg->frame3) >>
545 BT_UART_MSG_FRAME3MASTER_POS,
546 (BT_UART_MSG_FRAME3OBEX_MSK & uart_msg->frame3) >>
547 BT_UART_MSG_FRAME3OBEX_POS);
548
549 IWL_DEBUG_COEX(priv, "Idle duration = 0x%X\n",
550 (BT_UART_MSG_FRAME4IDLEDURATION_MSK & uart_msg->frame4) >>
551 BT_UART_MSG_FRAME4IDLEDURATION_POS);
552
553 IWL_DEBUG_COEX(priv, "Tx Activity = 0x%X, Rx Activity = 0x%X, "
554 "eSCO Retransmissions = 0x%X\n",
555 (BT_UART_MSG_FRAME5TXACTIVITY_MSK & uart_msg->frame5) >>
556 BT_UART_MSG_FRAME5TXACTIVITY_POS,
557 (BT_UART_MSG_FRAME5RXACTIVITY_MSK & uart_msg->frame5) >>
558 BT_UART_MSG_FRAME5RXACTIVITY_POS,
559 (BT_UART_MSG_FRAME5ESCORETRANSMIT_MSK & uart_msg->frame5) >>
560 BT_UART_MSG_FRAME5ESCORETRANSMIT_POS);
561
562 IWL_DEBUG_COEX(priv, "Sniff Interval = 0x%X, Discoverable = 0x%X\n",
563 (BT_UART_MSG_FRAME6SNIFFINTERVAL_MSK & uart_msg->frame6) >>
564 BT_UART_MSG_FRAME6SNIFFINTERVAL_POS,
565 (BT_UART_MSG_FRAME6DISCOVERABLE_MSK & uart_msg->frame6) >>
566 BT_UART_MSG_FRAME6DISCOVERABLE_POS);
567
568 IWL_DEBUG_COEX(priv, "Sniff Activity = 0x%X, Page = "
569 "0x%X, Inquiry = 0x%X, Connectable = 0x%X\n",
570 (BT_UART_MSG_FRAME7SNIFFACTIVITY_MSK & uart_msg->frame7) >>
571 BT_UART_MSG_FRAME7SNIFFACTIVITY_POS,
572 (BT_UART_MSG_FRAME7PAGE_MSK & uart_msg->frame7) >>
573 BT_UART_MSG_FRAME7PAGE_POS,
574 (BT_UART_MSG_FRAME7INQUIRY_MSK & uart_msg->frame7) >>
575 BT_UART_MSG_FRAME7INQUIRY_POS,
576 (BT_UART_MSG_FRAME7CONNECTABLE_MSK & uart_msg->frame7) >>
577 BT_UART_MSG_FRAME7CONNECTABLE_POS);
578 }
579
580 static bool iwlagn_set_kill_msk(struct iwl_priv *priv,
581 struct iwl_bt_uart_msg *uart_msg)
582 {
583 bool need_update = false;
584 u8 kill_msk = IWL_BT_KILL_REDUCE;
585 static const __le32 bt_kill_ack_msg[3] = {
586 IWLAGN_BT_KILL_ACK_MASK_DEFAULT,
587 IWLAGN_BT_KILL_ACK_CTS_MASK_SCO,
588 IWLAGN_BT_KILL_ACK_CTS_MASK_REDUCE};
589 static const __le32 bt_kill_cts_msg[3] = {
590 IWLAGN_BT_KILL_CTS_MASK_DEFAULT,
591 IWLAGN_BT_KILL_ACK_CTS_MASK_SCO,
592 IWLAGN_BT_KILL_ACK_CTS_MASK_REDUCE};
593
594 if (!priv->reduced_txpower)
595 kill_msk = (BT_UART_MSG_FRAME3SCOESCO_MSK & uart_msg->frame3)
596 ? IWL_BT_KILL_OVERRIDE : IWL_BT_KILL_DEFAULT;
597 if (priv->kill_ack_mask != bt_kill_ack_msg[kill_msk] ||
598 priv->kill_cts_mask != bt_kill_cts_msg[kill_msk]) {
599 priv->bt_valid |= IWLAGN_BT_VALID_KILL_ACK_MASK;
600 priv->kill_ack_mask = bt_kill_ack_msg[kill_msk];
601 priv->bt_valid |= IWLAGN_BT_VALID_KILL_CTS_MASK;
602 priv->kill_cts_mask = bt_kill_cts_msg[kill_msk];
603 need_update = true;
604 }
605 return need_update;
606 }
607
608 /*
609 * Upon RSSI changes, sends a bt config command with following changes
610 * 1. enable/disable "reduced control frames tx power
611 * 2. update the "kill)ack_mask" and "kill_cts_mask"
612 *
613 * If "reduced tx power" is enabled, uCode shall
614 * 1. ACK/Back/CTS rate shall reduced to 6Mbps
615 * 2. not use duplciate 20/40MHz mode
616 */
617 static bool iwlagn_fill_txpower_mode(struct iwl_priv *priv,
618 struct iwl_bt_uart_msg *uart_msg)
619 {
620 bool need_update = false;
621 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
622 int ave_rssi;
623
624 if (!ctx->vif || (ctx->vif->type != NL80211_IFTYPE_STATION)) {
625 IWL_DEBUG_INFO(priv, "BSS ctx not active or not in sta mode\n");
626 return false;
627 }
628
629 ave_rssi = ieee80211_ave_rssi(ctx->vif);
630 if (!ave_rssi) {
631 /* no rssi data, no changes to reduce tx power */
632 IWL_DEBUG_COEX(priv, "no rssi data available\n");
633 return need_update;
634 }
635 if (!priv->reduced_txpower &&
636 !iwl_is_associated(priv, IWL_RXON_CTX_PAN) &&
637 (ave_rssi > BT_ENABLE_REDUCED_TXPOWER_THRESHOLD) &&
638 (uart_msg->frame3 & (BT_UART_MSG_FRAME3ACL_MSK |
639 BT_UART_MSG_FRAME3OBEX_MSK)) &&
640 !(uart_msg->frame3 & (BT_UART_MSG_FRAME3SCOESCO_MSK |
641 BT_UART_MSG_FRAME3SNIFF_MSK | BT_UART_MSG_FRAME3A2DP_MSK))) {
642 /* enabling reduced tx power */
643 priv->reduced_txpower = true;
644 priv->bt_valid |= IWLAGN_BT_VALID_REDUCED_TX_PWR;
645 need_update = true;
646 } else if (priv->reduced_txpower &&
647 (iwl_is_associated(priv, IWL_RXON_CTX_PAN) ||
648 (ave_rssi < BT_DISABLE_REDUCED_TXPOWER_THRESHOLD) ||
649 (uart_msg->frame3 & (BT_UART_MSG_FRAME3SCOESCO_MSK |
650 BT_UART_MSG_FRAME3SNIFF_MSK | BT_UART_MSG_FRAME3A2DP_MSK)) ||
651 !(uart_msg->frame3 & (BT_UART_MSG_FRAME3ACL_MSK |
652 BT_UART_MSG_FRAME3OBEX_MSK)))) {
653 /* disable reduced tx power */
654 priv->reduced_txpower = false;
655 priv->bt_valid |= IWLAGN_BT_VALID_REDUCED_TX_PWR;
656 need_update = true;
657 }
658
659 return need_update;
660 }
661
662 static void iwlagn_bt_coex_profile_notif(struct iwl_priv *priv,
663 struct iwl_rx_cmd_buffer *rxb)
664 {
665 struct iwl_rx_packet *pkt = rxb_addr(rxb);
666 struct iwl_bt_coex_profile_notif *coex = (void *)pkt->data;
667 struct iwl_bt_uart_msg *uart_msg = &coex->last_bt_uart_msg;
668
669 if (priv->bt_enable_flag == IWLAGN_BT_FLAG_COEX_MODE_DISABLED) {
670 /* bt coex disabled */
671 return;
672 }
673
674 IWL_DEBUG_COEX(priv, "BT Coex notification:\n");
675 IWL_DEBUG_COEX(priv, " status: %d\n", coex->bt_status);
676 IWL_DEBUG_COEX(priv, " traffic load: %d\n", coex->bt_traffic_load);
677 IWL_DEBUG_COEX(priv, " CI compliance: %d\n",
678 coex->bt_ci_compliance);
679 iwlagn_print_uartmsg(priv, uart_msg);
680
681 priv->last_bt_traffic_load = priv->bt_traffic_load;
682 priv->bt_is_sco = iwlagn_bt_traffic_is_sco(uart_msg);
683
684 if (priv->iw_mode != NL80211_IFTYPE_ADHOC) {
685 if (priv->bt_status != coex->bt_status ||
686 priv->last_bt_traffic_load != coex->bt_traffic_load) {
687 if (coex->bt_status) {
688 /* BT on */
689 if (!priv->bt_ch_announce)
690 priv->bt_traffic_load =
691 IWL_BT_COEX_TRAFFIC_LOAD_HIGH;
692 else
693 priv->bt_traffic_load =
694 coex->bt_traffic_load;
695 } else {
696 /* BT off */
697 priv->bt_traffic_load =
698 IWL_BT_COEX_TRAFFIC_LOAD_NONE;
699 }
700 priv->bt_status = coex->bt_status;
701 queue_work(priv->workqueue,
702 &priv->bt_traffic_change_work);
703 }
704 }
705
706 /* schedule to send runtime bt_config */
707 /* check reduce power before change ack/cts kill mask */
708 if (iwlagn_fill_txpower_mode(priv, uart_msg) ||
709 iwlagn_set_kill_msk(priv, uart_msg))
710 queue_work(priv->workqueue, &priv->bt_runtime_config);
711
712
713 /* FIXME: based on notification, adjust the prio_boost */
714
715 priv->bt_ci_compliance = coex->bt_ci_compliance;
716 }
717
718 void iwlagn_bt_rx_handler_setup(struct iwl_priv *priv)
719 {
720 priv->rx_handlers[REPLY_BT_COEX_PROFILE_NOTIF] =
721 iwlagn_bt_coex_profile_notif;
722 }
723
724 void iwlagn_bt_setup_deferred_work(struct iwl_priv *priv)
725 {
726 INIT_WORK(&priv->bt_traffic_change_work,
727 iwlagn_bt_traffic_change_work);
728 }
729
730 void iwlagn_bt_cancel_deferred_work(struct iwl_priv *priv)
731 {
732 cancel_work_sync(&priv->bt_traffic_change_work);
733 }
734
735 static bool is_single_rx_stream(struct iwl_priv *priv)
736 {
737 return priv->current_ht_config.smps == IEEE80211_SMPS_STATIC ||
738 priv->current_ht_config.single_chain_sufficient;
739 }
740
741 #define IWL_NUM_RX_CHAINS_MULTIPLE 3
742 #define IWL_NUM_RX_CHAINS_SINGLE 2
743 #define IWL_NUM_IDLE_CHAINS_DUAL 2
744 #define IWL_NUM_IDLE_CHAINS_SINGLE 1
745
746 /*
747 * Determine how many receiver/antenna chains to use.
748 *
749 * More provides better reception via diversity. Fewer saves power
750 * at the expense of throughput, but only when not in powersave to
751 * start with.
752 *
753 * MIMO (dual stream) requires at least 2, but works better with 3.
754 * This does not determine *which* chains to use, just how many.
755 */
756 static int iwl_get_active_rx_chain_count(struct iwl_priv *priv)
757 {
758 if (priv->lib->bt_params &&
759 priv->lib->bt_params->advanced_bt_coexist &&
760 (priv->bt_full_concurrent ||
761 priv->bt_traffic_load >= IWL_BT_COEX_TRAFFIC_LOAD_HIGH)) {
762 /*
763 * only use chain 'A' in bt high traffic load or
764 * full concurrency mode
765 */
766 return IWL_NUM_RX_CHAINS_SINGLE;
767 }
768 /* # of Rx chains to use when expecting MIMO. */
769 if (is_single_rx_stream(priv))
770 return IWL_NUM_RX_CHAINS_SINGLE;
771 else
772 return IWL_NUM_RX_CHAINS_MULTIPLE;
773 }
774
775 /*
776 * When we are in power saving mode, unless device support spatial
777 * multiplexing power save, use the active count for rx chain count.
778 */
779 static int iwl_get_idle_rx_chain_count(struct iwl_priv *priv, int active_cnt)
780 {
781 /* # Rx chains when idling, depending on SMPS mode */
782 switch (priv->current_ht_config.smps) {
783 case IEEE80211_SMPS_STATIC:
784 case IEEE80211_SMPS_DYNAMIC:
785 return IWL_NUM_IDLE_CHAINS_SINGLE;
786 case IEEE80211_SMPS_AUTOMATIC:
787 case IEEE80211_SMPS_OFF:
788 return active_cnt;
789 default:
790 WARN(1, "invalid SMPS mode %d",
791 priv->current_ht_config.smps);
792 return active_cnt;
793 }
794 }
795
796 /* up to 4 chains */
797 static u8 iwl_count_chain_bitmap(u32 chain_bitmap)
798 {
799 u8 res;
800 res = (chain_bitmap & BIT(0)) >> 0;
801 res += (chain_bitmap & BIT(1)) >> 1;
802 res += (chain_bitmap & BIT(2)) >> 2;
803 res += (chain_bitmap & BIT(3)) >> 3;
804 return res;
805 }
806
807 /**
808 * iwlagn_set_rxon_chain - Set up Rx chain usage in "staging" RXON image
809 *
810 * Selects how many and which Rx receivers/antennas/chains to use.
811 * This should not be used for scan command ... it puts data in wrong place.
812 */
813 void iwlagn_set_rxon_chain(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
814 {
815 bool is_single = is_single_rx_stream(priv);
816 bool is_cam = !test_bit(STATUS_POWER_PMI, &priv->status);
817 u8 idle_rx_cnt, active_rx_cnt, valid_rx_cnt;
818 u32 active_chains;
819 u16 rx_chain;
820
821 /* Tell uCode which antennas are actually connected.
822 * Before first association, we assume all antennas are connected.
823 * Just after first association, iwl_chain_noise_calibration()
824 * checks which antennas actually *are* connected. */
825 if (priv->chain_noise_data.active_chains)
826 active_chains = priv->chain_noise_data.active_chains;
827 else
828 active_chains = priv->nvm_data->valid_rx_ant;
829
830 if (priv->lib->bt_params &&
831 priv->lib->bt_params->advanced_bt_coexist &&
832 (priv->bt_full_concurrent ||
833 priv->bt_traffic_load >= IWL_BT_COEX_TRAFFIC_LOAD_HIGH)) {
834 /*
835 * only use chain 'A' in bt high traffic load or
836 * full concurrency mode
837 */
838 active_chains = first_antenna(active_chains);
839 }
840
841 rx_chain = active_chains << RXON_RX_CHAIN_VALID_POS;
842
843 /* How many receivers should we use? */
844 active_rx_cnt = iwl_get_active_rx_chain_count(priv);
845 idle_rx_cnt = iwl_get_idle_rx_chain_count(priv, active_rx_cnt);
846
847
848 /* correct rx chain count according hw settings
849 * and chain noise calibration
850 */
851 valid_rx_cnt = iwl_count_chain_bitmap(active_chains);
852 if (valid_rx_cnt < active_rx_cnt)
853 active_rx_cnt = valid_rx_cnt;
854
855 if (valid_rx_cnt < idle_rx_cnt)
856 idle_rx_cnt = valid_rx_cnt;
857
858 rx_chain |= active_rx_cnt << RXON_RX_CHAIN_MIMO_CNT_POS;
859 rx_chain |= idle_rx_cnt << RXON_RX_CHAIN_CNT_POS;
860
861 ctx->staging.rx_chain = cpu_to_le16(rx_chain);
862
863 if (!is_single && (active_rx_cnt >= IWL_NUM_RX_CHAINS_SINGLE) && is_cam)
864 ctx->staging.rx_chain |= RXON_RX_CHAIN_MIMO_FORCE_MSK;
865 else
866 ctx->staging.rx_chain &= ~RXON_RX_CHAIN_MIMO_FORCE_MSK;
867
868 IWL_DEBUG_ASSOC(priv, "rx_chain=0x%X active=%d idle=%d\n",
869 ctx->staging.rx_chain,
870 active_rx_cnt, idle_rx_cnt);
871
872 WARN_ON(active_rx_cnt == 0 || idle_rx_cnt == 0 ||
873 active_rx_cnt < idle_rx_cnt);
874 }
875
876 u8 iwl_toggle_tx_ant(struct iwl_priv *priv, u8 ant, u8 valid)
877 {
878 int i;
879 u8 ind = ant;
880
881 if (priv->band == IEEE80211_BAND_2GHZ &&
882 priv->bt_traffic_load >= IWL_BT_COEX_TRAFFIC_LOAD_HIGH)
883 return 0;
884
885 for (i = 0; i < RATE_ANT_NUM - 1; i++) {
886 ind = (ind + 1) < RATE_ANT_NUM ? ind + 1 : 0;
887 if (valid & BIT(ind))
888 return ind;
889 }
890 return ant;
891 }
892
893 #ifdef CONFIG_PM_SLEEP
894 static void iwlagn_convert_p1k(u16 *p1k, __le16 *out)
895 {
896 int i;
897
898 for (i = 0; i < IWLAGN_P1K_SIZE; i++)
899 out[i] = cpu_to_le16(p1k[i]);
900 }
901
902 struct wowlan_key_data {
903 struct iwl_rxon_context *ctx;
904 struct iwlagn_wowlan_rsc_tsc_params_cmd *rsc_tsc;
905 struct iwlagn_wowlan_tkip_params_cmd *tkip;
906 const u8 *bssid;
907 bool error, use_rsc_tsc, use_tkip;
908 };
909
910
911 static void iwlagn_wowlan_program_keys(struct ieee80211_hw *hw,
912 struct ieee80211_vif *vif,
913 struct ieee80211_sta *sta,
914 struct ieee80211_key_conf *key,
915 void *_data)
916 {
917 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
918 struct wowlan_key_data *data = _data;
919 struct iwl_rxon_context *ctx = data->ctx;
920 struct aes_sc *aes_sc, *aes_tx_sc = NULL;
921 struct tkip_sc *tkip_sc, *tkip_tx_sc = NULL;
922 struct iwlagn_p1k_cache *rx_p1ks;
923 u8 *rx_mic_key;
924 struct ieee80211_key_seq seq;
925 u32 cur_rx_iv32 = 0;
926 u16 p1k[IWLAGN_P1K_SIZE];
927 int ret, i;
928
929 mutex_lock(&priv->mutex);
930
931 if ((key->cipher == WLAN_CIPHER_SUITE_WEP40 ||
932 key->cipher == WLAN_CIPHER_SUITE_WEP104) &&
933 !sta && !ctx->key_mapping_keys)
934 ret = iwl_set_default_wep_key(priv, ctx, key);
935 else
936 ret = iwl_set_dynamic_key(priv, ctx, key, sta);
937
938 if (ret) {
939 IWL_ERR(priv, "Error setting key during suspend!\n");
940 data->error = true;
941 }
942
943 switch (key->cipher) {
944 case WLAN_CIPHER_SUITE_TKIP:
945 if (sta) {
946 tkip_sc = data->rsc_tsc->all_tsc_rsc.tkip.unicast_rsc;
947 tkip_tx_sc = &data->rsc_tsc->all_tsc_rsc.tkip.tsc;
948
949 rx_p1ks = data->tkip->rx_uni;
950
951 ieee80211_get_key_tx_seq(key, &seq);
952 tkip_tx_sc->iv16 = cpu_to_le16(seq.tkip.iv16);
953 tkip_tx_sc->iv32 = cpu_to_le32(seq.tkip.iv32);
954
955 ieee80211_get_tkip_p1k_iv(key, seq.tkip.iv32, p1k);
956 iwlagn_convert_p1k(p1k, data->tkip->tx.p1k);
957
958 memcpy(data->tkip->mic_keys.tx,
959 &key->key[NL80211_TKIP_DATA_OFFSET_TX_MIC_KEY],
960 IWLAGN_MIC_KEY_SIZE);
961
962 rx_mic_key = data->tkip->mic_keys.rx_unicast;
963 } else {
964 tkip_sc =
965 data->rsc_tsc->all_tsc_rsc.tkip.multicast_rsc;
966 rx_p1ks = data->tkip->rx_multi;
967 rx_mic_key = data->tkip->mic_keys.rx_mcast;
968 }
969
970 /*
971 * For non-QoS this relies on the fact that both the uCode and
972 * mac80211 use TID 0 (as they need to to avoid replay attacks)
973 * for checking the IV in the frames.
974 */
975 for (i = 0; i < IWLAGN_NUM_RSC; i++) {
976 ieee80211_get_key_rx_seq(key, i, &seq);
977 tkip_sc[i].iv16 = cpu_to_le16(seq.tkip.iv16);
978 tkip_sc[i].iv32 = cpu_to_le32(seq.tkip.iv32);
979 /* wrapping isn't allowed, AP must rekey */
980 if (seq.tkip.iv32 > cur_rx_iv32)
981 cur_rx_iv32 = seq.tkip.iv32;
982 }
983
984 ieee80211_get_tkip_rx_p1k(key, data->bssid, cur_rx_iv32, p1k);
985 iwlagn_convert_p1k(p1k, rx_p1ks[0].p1k);
986 ieee80211_get_tkip_rx_p1k(key, data->bssid,
987 cur_rx_iv32 + 1, p1k);
988 iwlagn_convert_p1k(p1k, rx_p1ks[1].p1k);
989
990 memcpy(rx_mic_key,
991 &key->key[NL80211_TKIP_DATA_OFFSET_RX_MIC_KEY],
992 IWLAGN_MIC_KEY_SIZE);
993
994 data->use_tkip = true;
995 data->use_rsc_tsc = true;
996 break;
997 case WLAN_CIPHER_SUITE_CCMP:
998 if (sta) {
999 u8 *pn = seq.ccmp.pn;
1000
1001 aes_sc = data->rsc_tsc->all_tsc_rsc.aes.unicast_rsc;
1002 aes_tx_sc = &data->rsc_tsc->all_tsc_rsc.aes.tsc;
1003
1004 ieee80211_get_key_tx_seq(key, &seq);
1005 aes_tx_sc->pn = cpu_to_le64(
1006 (u64)pn[5] |
1007 ((u64)pn[4] << 8) |
1008 ((u64)pn[3] << 16) |
1009 ((u64)pn[2] << 24) |
1010 ((u64)pn[1] << 32) |
1011 ((u64)pn[0] << 40));
1012 } else
1013 aes_sc = data->rsc_tsc->all_tsc_rsc.aes.multicast_rsc;
1014
1015 /*
1016 * For non-QoS this relies on the fact that both the uCode and
1017 * mac80211 use TID 0 for checking the IV in the frames.
1018 */
1019 for (i = 0; i < IWLAGN_NUM_RSC; i++) {
1020 u8 *pn = seq.ccmp.pn;
1021
1022 ieee80211_get_key_rx_seq(key, i, &seq);
1023 aes_sc->pn = cpu_to_le64(
1024 (u64)pn[5] |
1025 ((u64)pn[4] << 8) |
1026 ((u64)pn[3] << 16) |
1027 ((u64)pn[2] << 24) |
1028 ((u64)pn[1] << 32) |
1029 ((u64)pn[0] << 40));
1030 }
1031 data->use_rsc_tsc = true;
1032 break;
1033 }
1034
1035 mutex_unlock(&priv->mutex);
1036 }
1037
1038 int iwlagn_send_patterns(struct iwl_priv *priv,
1039 struct cfg80211_wowlan *wowlan)
1040 {
1041 struct iwlagn_wowlan_patterns_cmd *pattern_cmd;
1042 struct iwl_host_cmd cmd = {
1043 .id = REPLY_WOWLAN_PATTERNS,
1044 .dataflags[0] = IWL_HCMD_DFL_NOCOPY,
1045 };
1046 int i, err;
1047
1048 if (!wowlan->n_patterns)
1049 return 0;
1050
1051 cmd.len[0] = sizeof(*pattern_cmd) +
1052 wowlan->n_patterns * sizeof(struct iwlagn_wowlan_pattern);
1053
1054 pattern_cmd = kmalloc(cmd.len[0], GFP_KERNEL);
1055 if (!pattern_cmd)
1056 return -ENOMEM;
1057
1058 pattern_cmd->n_patterns = cpu_to_le32(wowlan->n_patterns);
1059
1060 for (i = 0; i < wowlan->n_patterns; i++) {
1061 int mask_len = DIV_ROUND_UP(wowlan->patterns[i].pattern_len, 8);
1062
1063 memcpy(&pattern_cmd->patterns[i].mask,
1064 wowlan->patterns[i].mask, mask_len);
1065 memcpy(&pattern_cmd->patterns[i].pattern,
1066 wowlan->patterns[i].pattern,
1067 wowlan->patterns[i].pattern_len);
1068 pattern_cmd->patterns[i].mask_size = mask_len;
1069 pattern_cmd->patterns[i].pattern_size =
1070 wowlan->patterns[i].pattern_len;
1071 }
1072
1073 cmd.data[0] = pattern_cmd;
1074 err = iwl_dvm_send_cmd(priv, &cmd);
1075 kfree(pattern_cmd);
1076 return err;
1077 }
1078
1079 int iwlagn_suspend(struct iwl_priv *priv, struct cfg80211_wowlan *wowlan)
1080 {
1081 struct iwlagn_wowlan_wakeup_filter_cmd wakeup_filter_cmd;
1082 struct iwl_rxon_cmd rxon;
1083 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
1084 struct iwlagn_wowlan_kek_kck_material_cmd kek_kck_cmd;
1085 struct iwlagn_wowlan_tkip_params_cmd tkip_cmd = {};
1086 struct iwlagn_d3_config_cmd d3_cfg_cmd = {
1087 /*
1088 * Program the minimum sleep time to 10 seconds, as many
1089 * platforms have issues processing a wakeup signal while
1090 * still being in the process of suspending.
1091 */
1092 .min_sleep_time = cpu_to_le32(10 * 1000 * 1000),
1093 };
1094 struct wowlan_key_data key_data = {
1095 .ctx = ctx,
1096 .bssid = ctx->active.bssid_addr,
1097 .use_rsc_tsc = false,
1098 .tkip = &tkip_cmd,
1099 .use_tkip = false,
1100 };
1101 int ret, i;
1102 u16 seq;
1103
1104 key_data.rsc_tsc = kzalloc(sizeof(*key_data.rsc_tsc), GFP_KERNEL);
1105 if (!key_data.rsc_tsc)
1106 return -ENOMEM;
1107
1108 memset(&wakeup_filter_cmd, 0, sizeof(wakeup_filter_cmd));
1109
1110 /*
1111 * We know the last used seqno, and the uCode expects to know that
1112 * one, it will increment before TX.
1113 */
1114 seq = le16_to_cpu(priv->last_seq_ctl) & IEEE80211_SCTL_SEQ;
1115 wakeup_filter_cmd.non_qos_seq = cpu_to_le16(seq);
1116
1117 /*
1118 * For QoS counters, we store the one to use next, so subtract 0x10
1119 * since the uCode will add 0x10 before using the value.
1120 */
1121 for (i = 0; i < IWL_MAX_TID_COUNT; i++) {
1122 seq = priv->tid_data[IWL_AP_ID][i].seq_number;
1123 seq -= 0x10;
1124 wakeup_filter_cmd.qos_seq[i] = cpu_to_le16(seq);
1125 }
1126
1127 if (wowlan->disconnect)
1128 wakeup_filter_cmd.enabled |=
1129 cpu_to_le32(IWLAGN_WOWLAN_WAKEUP_BEACON_MISS |
1130 IWLAGN_WOWLAN_WAKEUP_LINK_CHANGE);
1131 if (wowlan->magic_pkt)
1132 wakeup_filter_cmd.enabled |=
1133 cpu_to_le32(IWLAGN_WOWLAN_WAKEUP_MAGIC_PACKET);
1134 if (wowlan->gtk_rekey_failure)
1135 wakeup_filter_cmd.enabled |=
1136 cpu_to_le32(IWLAGN_WOWLAN_WAKEUP_GTK_REKEY_FAIL);
1137 if (wowlan->eap_identity_req)
1138 wakeup_filter_cmd.enabled |=
1139 cpu_to_le32(IWLAGN_WOWLAN_WAKEUP_EAP_IDENT_REQ);
1140 if (wowlan->four_way_handshake)
1141 wakeup_filter_cmd.enabled |=
1142 cpu_to_le32(IWLAGN_WOWLAN_WAKEUP_4WAY_HANDSHAKE);
1143 if (wowlan->n_patterns)
1144 wakeup_filter_cmd.enabled |=
1145 cpu_to_le32(IWLAGN_WOWLAN_WAKEUP_PATTERN_MATCH);
1146
1147 if (wowlan->rfkill_release)
1148 d3_cfg_cmd.wakeup_flags |=
1149 cpu_to_le32(IWLAGN_D3_WAKEUP_RFKILL);
1150
1151 iwl_scan_cancel_timeout(priv, 200);
1152
1153 memcpy(&rxon, &ctx->active, sizeof(rxon));
1154
1155 priv->ucode_loaded = false;
1156 iwl_trans_stop_device(priv->trans);
1157
1158 priv->wowlan = true;
1159
1160 ret = iwl_load_ucode_wait_alive(priv, IWL_UCODE_WOWLAN);
1161 if (ret)
1162 goto out;
1163
1164 /* now configure WoWLAN ucode */
1165 ret = iwl_alive_start(priv);
1166 if (ret)
1167 goto out;
1168
1169 memcpy(&ctx->staging, &rxon, sizeof(rxon));
1170 ret = iwlagn_commit_rxon(priv, ctx);
1171 if (ret)
1172 goto out;
1173
1174 ret = iwl_power_update_mode(priv, true);
1175 if (ret)
1176 goto out;
1177
1178 if (!iwlwifi_mod_params.sw_crypto) {
1179 /* mark all keys clear */
1180 priv->ucode_key_table = 0;
1181 ctx->key_mapping_keys = 0;
1182
1183 /*
1184 * This needs to be unlocked due to lock ordering
1185 * constraints. Since we're in the suspend path
1186 * that isn't really a problem though.
1187 */
1188 mutex_unlock(&priv->mutex);
1189 ieee80211_iter_keys(priv->hw, ctx->vif,
1190 iwlagn_wowlan_program_keys,
1191 &key_data);
1192 mutex_lock(&priv->mutex);
1193 if (key_data.error) {
1194 ret = -EIO;
1195 goto out;
1196 }
1197
1198 if (key_data.use_rsc_tsc) {
1199 struct iwl_host_cmd rsc_tsc_cmd = {
1200 .id = REPLY_WOWLAN_TSC_RSC_PARAMS,
1201 .data[0] = key_data.rsc_tsc,
1202 .dataflags[0] = IWL_HCMD_DFL_NOCOPY,
1203 .len[0] = sizeof(*key_data.rsc_tsc),
1204 };
1205
1206 ret = iwl_dvm_send_cmd(priv, &rsc_tsc_cmd);
1207 if (ret)
1208 goto out;
1209 }
1210
1211 if (key_data.use_tkip) {
1212 ret = iwl_dvm_send_cmd_pdu(priv,
1213 REPLY_WOWLAN_TKIP_PARAMS,
1214 0, sizeof(tkip_cmd),
1215 &tkip_cmd);
1216 if (ret)
1217 goto out;
1218 }
1219
1220 if (priv->have_rekey_data) {
1221 memset(&kek_kck_cmd, 0, sizeof(kek_kck_cmd));
1222 memcpy(kek_kck_cmd.kck, priv->kck, NL80211_KCK_LEN);
1223 kek_kck_cmd.kck_len = cpu_to_le16(NL80211_KCK_LEN);
1224 memcpy(kek_kck_cmd.kek, priv->kek, NL80211_KEK_LEN);
1225 kek_kck_cmd.kek_len = cpu_to_le16(NL80211_KEK_LEN);
1226 kek_kck_cmd.replay_ctr = priv->replay_ctr;
1227
1228 ret = iwl_dvm_send_cmd_pdu(priv,
1229 REPLY_WOWLAN_KEK_KCK_MATERIAL,
1230 0, sizeof(kek_kck_cmd),
1231 &kek_kck_cmd);
1232 if (ret)
1233 goto out;
1234 }
1235 }
1236
1237 ret = iwl_dvm_send_cmd_pdu(priv, REPLY_D3_CONFIG, 0,
1238 sizeof(d3_cfg_cmd), &d3_cfg_cmd);
1239 if (ret)
1240 goto out;
1241
1242 ret = iwl_dvm_send_cmd_pdu(priv, REPLY_WOWLAN_WAKEUP_FILTER,
1243 0, sizeof(wakeup_filter_cmd),
1244 &wakeup_filter_cmd);
1245 if (ret)
1246 goto out;
1247
1248 ret = iwlagn_send_patterns(priv, wowlan);
1249 out:
1250 kfree(key_data.rsc_tsc);
1251 return ret;
1252 }
1253 #endif
1254
1255 int iwl_dvm_send_cmd(struct iwl_priv *priv, struct iwl_host_cmd *cmd)
1256 {
1257 if (iwl_is_rfkill(priv) || iwl_is_ctkill(priv)) {
1258 IWL_WARN(priv, "Not sending command - %s KILL\n",
1259 iwl_is_rfkill(priv) ? "RF" : "CT");
1260 return -EIO;
1261 }
1262
1263 if (test_bit(STATUS_FW_ERROR, &priv->status)) {
1264 IWL_ERR(priv, "Command %s failed: FW Error\n",
1265 iwl_dvm_get_cmd_string(cmd->id));
1266 return -EIO;
1267 }
1268
1269 /*
1270 * This can happen upon FW ASSERT: we clear the STATUS_FW_ERROR flag
1271 * in iwl_down but cancel the workers only later.
1272 */
1273 if (!priv->ucode_loaded) {
1274 IWL_ERR(priv, "Fw not loaded - dropping CMD: %x\n", cmd->id);
1275 return -EIO;
1276 }
1277
1278 /*
1279 * Synchronous commands from this op-mode must hold
1280 * the mutex, this ensures we don't try to send two
1281 * (or more) synchronous commands at a time.
1282 */
1283 if (!(cmd->flags & CMD_ASYNC))
1284 lockdep_assert_held(&priv->mutex);
1285
1286 return iwl_trans_send_cmd(priv->trans, cmd);
1287 }
1288
1289 int iwl_dvm_send_cmd_pdu(struct iwl_priv *priv, u8 id,
1290 u32 flags, u16 len, const void *data)
1291 {
1292 struct iwl_host_cmd cmd = {
1293 .id = id,
1294 .len = { len, },
1295 .data = { data, },
1296 .flags = flags,
1297 };
1298
1299 return iwl_dvm_send_cmd(priv, &cmd);
1300 }
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