1 // SPDX-License-Identifier: GPL-2.0-only
2 /******************************************************************************
3  *
4  * Copyright(c) 2008 - 2014 Intel Corporation. All rights reserved.
5  *****************************************************************************/
6 #include <linux/etherdevice.h>
7 #include <linux/kernel.h>
8 #include <linux/module.h>
9 #include <linux/sched.h>
10 #include <net/mac80211.h>
11 
12 #include "iwl-io.h"
13 #include "iwl-agn-hw.h"
14 #include "iwl-trans.h"
15 #include "iwl-modparams.h"
16 
17 #include "dev.h"
18 #include "agn.h"
19 
iwlagn_hw_valid_rtc_data_addr(u32 addr)20 int iwlagn_hw_valid_rtc_data_addr(u32 addr)
21 {
22 	return (addr >= IWLAGN_RTC_DATA_LOWER_BOUND) &&
23 		(addr < IWLAGN_RTC_DATA_UPPER_BOUND);
24 }
25 
iwlagn_send_tx_power(struct iwl_priv * priv)26 int iwlagn_send_tx_power(struct iwl_priv *priv)
27 {
28 	struct iwlagn_tx_power_dbm_cmd tx_power_cmd;
29 	u8 tx_ant_cfg_cmd;
30 
31 	if (WARN_ONCE(test_bit(STATUS_SCAN_HW, &priv->status),
32 		      "TX Power requested while scanning!\n"))
33 		return -EAGAIN;
34 
35 	/* half dBm need to multiply */
36 	tx_power_cmd.global_lmt = (s8)(2 * priv->tx_power_user_lmt);
37 
38 	if (tx_power_cmd.global_lmt > priv->nvm_data->max_tx_pwr_half_dbm) {
39 		/*
40 		 * For the newer devices which using enhanced/extend tx power
41 		 * table in EEPROM, the format is in half dBm. driver need to
42 		 * convert to dBm format before report to mac80211.
43 		 * By doing so, there is a possibility of 1/2 dBm resolution
44 		 * lost. driver will perform "round-up" operation before
45 		 * reporting, but it will cause 1/2 dBm tx power over the
46 		 * regulatory limit. Perform the checking here, if the
47 		 * "tx_power_user_lmt" is higher than EEPROM value (in
48 		 * half-dBm format), lower the tx power based on EEPROM
49 		 */
50 		tx_power_cmd.global_lmt =
51 			priv->nvm_data->max_tx_pwr_half_dbm;
52 	}
53 	tx_power_cmd.flags = IWLAGN_TX_POWER_NO_CLOSED;
54 	tx_power_cmd.srv_chan_lmt = IWLAGN_TX_POWER_AUTO;
55 
56 	if (IWL_UCODE_API(priv->fw->ucode_ver) == 1)
57 		tx_ant_cfg_cmd = REPLY_TX_POWER_DBM_CMD_V1;
58 	else
59 		tx_ant_cfg_cmd = REPLY_TX_POWER_DBM_CMD;
60 
61 	return iwl_dvm_send_cmd_pdu(priv, tx_ant_cfg_cmd, 0,
62 			sizeof(tx_power_cmd), &tx_power_cmd);
63 }
64 
iwlagn_temperature(struct iwl_priv * priv)65 void iwlagn_temperature(struct iwl_priv *priv)
66 {
67 	lockdep_assert_held(&priv->statistics.lock);
68 
69 	/* store temperature from correct statistics (in Celsius) */
70 	priv->temperature = le32_to_cpu(priv->statistics.common.temperature);
71 	iwl_tt_handler(priv);
72 }
73 
iwlagn_hwrate_to_mac80211_idx(u32 rate_n_flags,enum nl80211_band band)74 int iwlagn_hwrate_to_mac80211_idx(u32 rate_n_flags, enum nl80211_band band)
75 {
76 	int idx = 0;
77 	int band_offset = 0;
78 
79 	/* HT rate format: mac80211 wants an MCS number, which is just LSB */
80 	if (rate_n_flags & RATE_MCS_HT_MSK) {
81 		idx = (rate_n_flags & 0xff);
82 		return idx;
83 	/* Legacy rate format, search for match in table */
84 	} else {
85 		if (band == NL80211_BAND_5GHZ)
86 			band_offset = IWL_FIRST_OFDM_RATE;
87 		for (idx = band_offset; idx < IWL_RATE_COUNT_LEGACY; idx++)
88 			if (iwl_rates[idx].plcp == (rate_n_flags & 0xFF))
89 				return idx - band_offset;
90 	}
91 
92 	return -1;
93 }
94 
iwlagn_manage_ibss_station(struct iwl_priv * priv,struct ieee80211_vif * vif,bool add)95 int iwlagn_manage_ibss_station(struct iwl_priv *priv,
96 			       struct ieee80211_vif *vif, bool add)
97 {
98 	struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
99 
100 	if (add)
101 		return iwlagn_add_bssid_station(priv, vif_priv->ctx,
102 						vif->bss_conf.bssid,
103 						&vif_priv->ibss_bssid_sta_id);
104 	return iwl_remove_station(priv, vif_priv->ibss_bssid_sta_id,
105 				  vif->bss_conf.bssid);
106 }
107 
108 /*
109  * iwlagn_txfifo_flush: send REPLY_TXFIFO_FLUSH command to uCode
110  *
111  * pre-requirements:
112  *  1. acquire mutex before calling
113  *  2. make sure rf is on and not in exit state
114  */
iwlagn_txfifo_flush(struct iwl_priv * priv,u32 scd_q_msk)115 int iwlagn_txfifo_flush(struct iwl_priv *priv, u32 scd_q_msk)
116 {
117 	struct iwl_txfifo_flush_cmd_v3 flush_cmd_v3 = {
118 		.flush_control = cpu_to_le16(IWL_DROP_ALL),
119 	};
120 	struct iwl_txfifo_flush_cmd_v2 flush_cmd_v2 = {
121 		.flush_control = cpu_to_le16(IWL_DROP_ALL),
122 	};
123 
124 	u32 queue_control = IWL_SCD_VO_MSK | IWL_SCD_VI_MSK |
125 			    IWL_SCD_BE_MSK | IWL_SCD_BK_MSK | IWL_SCD_MGMT_MSK;
126 
127 	if ((priv->valid_contexts != BIT(IWL_RXON_CTX_BSS)))
128 		queue_control |= IWL_PAN_SCD_VO_MSK | IWL_PAN_SCD_VI_MSK |
129 				 IWL_PAN_SCD_BE_MSK | IWL_PAN_SCD_BK_MSK |
130 				 IWL_PAN_SCD_MGMT_MSK |
131 				 IWL_PAN_SCD_MULTICAST_MSK;
132 
133 	if (priv->nvm_data->sku_cap_11n_enable)
134 		queue_control |= IWL_AGG_TX_QUEUE_MSK;
135 
136 	if (scd_q_msk)
137 		queue_control = scd_q_msk;
138 
139 	IWL_DEBUG_INFO(priv, "queue control: 0x%x\n", queue_control);
140 	flush_cmd_v3.queue_control = cpu_to_le32(queue_control);
141 	flush_cmd_v2.queue_control = cpu_to_le16((u16)queue_control);
142 
143 	if (IWL_UCODE_API(priv->fw->ucode_ver) > 2)
144 		return iwl_dvm_send_cmd_pdu(priv, REPLY_TXFIFO_FLUSH, 0,
145 					    sizeof(flush_cmd_v3),
146 					    &flush_cmd_v3);
147 	return iwl_dvm_send_cmd_pdu(priv, REPLY_TXFIFO_FLUSH, 0,
148 				    sizeof(flush_cmd_v2), &flush_cmd_v2);
149 }
150 
iwlagn_dev_txfifo_flush(struct iwl_priv * priv)151 void iwlagn_dev_txfifo_flush(struct iwl_priv *priv)
152 {
153 	mutex_lock(&priv->mutex);
154 	ieee80211_stop_queues(priv->hw);
155 	if (iwlagn_txfifo_flush(priv, 0)) {
156 		IWL_ERR(priv, "flush request fail\n");
157 		goto done;
158 	}
159 	IWL_DEBUG_INFO(priv, "wait transmit/flush all frames\n");
160 	iwl_trans_wait_tx_queues_empty(priv->trans, 0xffffffff);
161 done:
162 	ieee80211_wake_queues(priv->hw);
163 	mutex_unlock(&priv->mutex);
164 }
165 
166 /*
167  * BT coex
168  */
169 /* Notmal TDM */
170 static const __le32 iwlagn_def_3w_lookup[IWLAGN_BT_DECISION_LUT_SIZE] = {
171 	cpu_to_le32(0xaaaaaaaa),
172 	cpu_to_le32(0xaaaaaaaa),
173 	cpu_to_le32(0xaeaaaaaa),
174 	cpu_to_le32(0xaaaaaaaa),
175 	cpu_to_le32(0xcc00ff28),
176 	cpu_to_le32(0x0000aaaa),
177 	cpu_to_le32(0xcc00aaaa),
178 	cpu_to_le32(0x0000aaaa),
179 	cpu_to_le32(0xc0004000),
180 	cpu_to_le32(0x00004000),
181 	cpu_to_le32(0xf0005000),
182 	cpu_to_le32(0xf0005000),
183 };
184 
185 /* Full concurrency */
186 static const __le32 iwlagn_concurrent_lookup[IWLAGN_BT_DECISION_LUT_SIZE] = {
187 	cpu_to_le32(0xaaaaaaaa),
188 	cpu_to_le32(0xaaaaaaaa),
189 	cpu_to_le32(0xaaaaaaaa),
190 	cpu_to_le32(0xaaaaaaaa),
191 	cpu_to_le32(0xaaaaaaaa),
192 	cpu_to_le32(0xaaaaaaaa),
193 	cpu_to_le32(0xaaaaaaaa),
194 	cpu_to_le32(0xaaaaaaaa),
195 	cpu_to_le32(0x00000000),
196 	cpu_to_le32(0x00000000),
197 	cpu_to_le32(0x00000000),
198 	cpu_to_le32(0x00000000),
199 };
200 
iwlagn_send_advance_bt_config(struct iwl_priv * priv)201 void iwlagn_send_advance_bt_config(struct iwl_priv *priv)
202 {
203 	struct iwl_basic_bt_cmd basic = {
204 		.max_kill = IWLAGN_BT_MAX_KILL_DEFAULT,
205 		.bt3_timer_t7_value = IWLAGN_BT3_T7_DEFAULT,
206 		.bt3_prio_sample_time = IWLAGN_BT3_PRIO_SAMPLE_DEFAULT,
207 		.bt3_timer_t2_value = IWLAGN_BT3_T2_DEFAULT,
208 	};
209 	struct iwl_bt_cmd_v1 bt_cmd_v1;
210 	struct iwl_bt_cmd_v2 bt_cmd_v2;
211 	int ret;
212 
213 	BUILD_BUG_ON(sizeof(iwlagn_def_3w_lookup) !=
214 			sizeof(basic.bt3_lookup_table));
215 
216 	if (priv->lib->bt_params) {
217 		/*
218 		 * newer generation of devices (2000 series and newer)
219 		 * use the version 2 of the bt command
220 		 * we need to make sure sending the host command
221 		 * with correct data structure to avoid uCode assert
222 		 */
223 		if (priv->lib->bt_params->bt_session_2) {
224 			bt_cmd_v2.prio_boost = cpu_to_le32(
225 				priv->lib->bt_params->bt_prio_boost);
226 			bt_cmd_v2.tx_prio_boost = 0;
227 			bt_cmd_v2.rx_prio_boost = 0;
228 		} else {
229 			/* older version only has 8 bits */
230 			WARN_ON(priv->lib->bt_params->bt_prio_boost & ~0xFF);
231 			bt_cmd_v1.prio_boost =
232 				priv->lib->bt_params->bt_prio_boost;
233 			bt_cmd_v1.tx_prio_boost = 0;
234 			bt_cmd_v1.rx_prio_boost = 0;
235 		}
236 	} else {
237 		IWL_ERR(priv, "failed to construct BT Coex Config\n");
238 		return;
239 	}
240 
241 	/*
242 	 * Possible situations when BT needs to take over for receive,
243 	 * at the same time where STA needs to response to AP's frame(s),
244 	 * reduce the tx power of the required response frames, by that,
245 	 * allow the concurrent BT receive & WiFi transmit
246 	 * (BT - ANT A, WiFi -ANT B), without interference to one another
247 	 *
248 	 * Reduced tx power apply to control frames only (ACK/Back/CTS)
249 	 * when indicated by the BT config command
250 	 */
251 	basic.kill_ack_mask = priv->kill_ack_mask;
252 	basic.kill_cts_mask = priv->kill_cts_mask;
253 	if (priv->reduced_txpower)
254 		basic.reduce_txpower = IWLAGN_BT_REDUCED_TX_PWR;
255 	basic.valid = priv->bt_valid;
256 
257 	/*
258 	 * Configure BT coex mode to "no coexistence" when the
259 	 * user disabled BT coexistence, we have no interface
260 	 * (might be in monitor mode), or the interface is in
261 	 * IBSS mode (no proper uCode support for coex then).
262 	 */
263 	if (!iwlwifi_mod_params.bt_coex_active ||
264 	    priv->iw_mode == NL80211_IFTYPE_ADHOC) {
265 		basic.flags = IWLAGN_BT_FLAG_COEX_MODE_DISABLED;
266 	} else {
267 		basic.flags = IWLAGN_BT_FLAG_COEX_MODE_3W <<
268 					IWLAGN_BT_FLAG_COEX_MODE_SHIFT;
269 
270 		if (!priv->bt_enable_pspoll)
271 			basic.flags |= IWLAGN_BT_FLAG_SYNC_2_BT_DISABLE;
272 		else
273 			basic.flags &= ~IWLAGN_BT_FLAG_SYNC_2_BT_DISABLE;
274 
275 		if (priv->bt_ch_announce)
276 			basic.flags |= IWLAGN_BT_FLAG_CHANNEL_INHIBITION;
277 		IWL_DEBUG_COEX(priv, "BT coex flag: 0X%x\n", basic.flags);
278 	}
279 	priv->bt_enable_flag = basic.flags;
280 	if (priv->bt_full_concurrent)
281 		memcpy(basic.bt3_lookup_table, iwlagn_concurrent_lookup,
282 			sizeof(iwlagn_concurrent_lookup));
283 	else
284 		memcpy(basic.bt3_lookup_table, iwlagn_def_3w_lookup,
285 			sizeof(iwlagn_def_3w_lookup));
286 
287 	IWL_DEBUG_COEX(priv, "BT coex %s in %s mode\n",
288 		       basic.flags ? "active" : "disabled",
289 		       priv->bt_full_concurrent ?
290 		       "full concurrency" : "3-wire");
291 
292 	if (priv->lib->bt_params->bt_session_2) {
293 		memcpy(&bt_cmd_v2.basic, &basic,
294 			sizeof(basic));
295 		ret = iwl_dvm_send_cmd_pdu(priv, REPLY_BT_CONFIG,
296 			0, sizeof(bt_cmd_v2), &bt_cmd_v2);
297 	} else {
298 		memcpy(&bt_cmd_v1.basic, &basic,
299 			sizeof(basic));
300 		ret = iwl_dvm_send_cmd_pdu(priv, REPLY_BT_CONFIG,
301 			0, sizeof(bt_cmd_v1), &bt_cmd_v1);
302 	}
303 	if (ret)
304 		IWL_ERR(priv, "failed to send BT Coex Config\n");
305 
306 }
307 
iwlagn_bt_adjust_rssi_monitor(struct iwl_priv * priv,bool rssi_ena)308 void iwlagn_bt_adjust_rssi_monitor(struct iwl_priv *priv, bool rssi_ena)
309 {
310 	struct iwl_rxon_context *ctx, *found_ctx = NULL;
311 	bool found_ap = false;
312 
313 	lockdep_assert_held(&priv->mutex);
314 
315 	/* Check whether AP or GO mode is active. */
316 	if (rssi_ena) {
317 		for_each_context(priv, ctx) {
318 			if (ctx->vif && ctx->vif->type == NL80211_IFTYPE_AP &&
319 			    iwl_is_associated_ctx(ctx)) {
320 				found_ap = true;
321 				break;
322 			}
323 		}
324 	}
325 
326 	/*
327 	 * If disable was received or If GO/AP mode, disable RSSI
328 	 * measurements.
329 	 */
330 	if (!rssi_ena || found_ap) {
331 		if (priv->cur_rssi_ctx) {
332 			ctx = priv->cur_rssi_ctx;
333 			ieee80211_disable_rssi_reports(ctx->vif);
334 			priv->cur_rssi_ctx = NULL;
335 		}
336 		return;
337 	}
338 
339 	/*
340 	 * If rssi measurements need to be enabled, consider all cases now.
341 	 * Figure out how many contexts are active.
342 	 */
343 	for_each_context(priv, ctx) {
344 		if (ctx->vif && ctx->vif->type == NL80211_IFTYPE_STATION &&
345 		    iwl_is_associated_ctx(ctx)) {
346 			found_ctx = ctx;
347 			break;
348 		}
349 	}
350 
351 	/*
352 	 * rssi monitor already enabled for the correct interface...nothing
353 	 * to do.
354 	 */
355 	if (found_ctx == priv->cur_rssi_ctx)
356 		return;
357 
358 	/*
359 	 * Figure out if rssi monitor is currently enabled, and needs
360 	 * to be changed. If rssi monitor is already enabled, disable
361 	 * it first else just enable rssi measurements on the
362 	 * interface found above.
363 	 */
364 	if (priv->cur_rssi_ctx) {
365 		ctx = priv->cur_rssi_ctx;
366 		if (ctx->vif)
367 			ieee80211_disable_rssi_reports(ctx->vif);
368 	}
369 
370 	priv->cur_rssi_ctx = found_ctx;
371 
372 	if (!found_ctx)
373 		return;
374 
375 	ieee80211_enable_rssi_reports(found_ctx->vif,
376 			IWLAGN_BT_PSP_MIN_RSSI_THRESHOLD,
377 			IWLAGN_BT_PSP_MAX_RSSI_THRESHOLD);
378 }
379 
iwlagn_bt_traffic_is_sco(struct iwl_bt_uart_msg * uart_msg)380 static bool iwlagn_bt_traffic_is_sco(struct iwl_bt_uart_msg *uart_msg)
381 {
382 	return (BT_UART_MSG_FRAME3SCOESCO_MSK & uart_msg->frame3) >>
383 		BT_UART_MSG_FRAME3SCOESCO_POS;
384 }
385 
iwlagn_bt_traffic_change_work(struct work_struct * work)386 static void iwlagn_bt_traffic_change_work(struct work_struct *work)
387 {
388 	struct iwl_priv *priv =
389 		container_of(work, struct iwl_priv, bt_traffic_change_work);
390 	struct iwl_rxon_context *ctx;
391 	int smps_request = -1;
392 
393 	if (priv->bt_enable_flag == IWLAGN_BT_FLAG_COEX_MODE_DISABLED) {
394 		/* bt coex disabled */
395 		return;
396 	}
397 
398 	/*
399 	 * Note: bt_traffic_load can be overridden by scan complete and
400 	 * coex profile notifications. Ignore that since only bad consequence
401 	 * can be not matching debug print with actual state.
402 	 */
403 	IWL_DEBUG_COEX(priv, "BT traffic load changes: %d\n",
404 		       priv->bt_traffic_load);
405 
406 	switch (priv->bt_traffic_load) {
407 	case IWL_BT_COEX_TRAFFIC_LOAD_NONE:
408 		if (priv->bt_status)
409 			smps_request = IEEE80211_SMPS_DYNAMIC;
410 		else
411 			smps_request = IEEE80211_SMPS_AUTOMATIC;
412 		break;
413 	case IWL_BT_COEX_TRAFFIC_LOAD_LOW:
414 		smps_request = IEEE80211_SMPS_DYNAMIC;
415 		break;
416 	case IWL_BT_COEX_TRAFFIC_LOAD_HIGH:
417 	case IWL_BT_COEX_TRAFFIC_LOAD_CONTINUOUS:
418 		smps_request = IEEE80211_SMPS_STATIC;
419 		break;
420 	default:
421 		IWL_ERR(priv, "Invalid BT traffic load: %d\n",
422 			priv->bt_traffic_load);
423 		break;
424 	}
425 
426 	mutex_lock(&priv->mutex);
427 
428 	/*
429 	 * We can not send command to firmware while scanning. When the scan
430 	 * complete we will schedule this work again. We do check with mutex
431 	 * locked to prevent new scan request to arrive. We do not check
432 	 * STATUS_SCANNING to avoid race when queue_work two times from
433 	 * different notifications, but quit and not perform any work at all.
434 	 */
435 	if (test_bit(STATUS_SCAN_HW, &priv->status))
436 		goto out;
437 
438 	iwl_update_chain_flags(priv);
439 
440 	if (smps_request != -1) {
441 		priv->current_ht_config.smps = smps_request;
442 		for_each_context(priv, ctx) {
443 			if (ctx->vif && ctx->vif->type == NL80211_IFTYPE_STATION)
444 				ieee80211_request_smps(ctx->vif, smps_request);
445 		}
446 	}
447 
448 	/*
449 	 * Dynamic PS poll related functionality. Adjust RSSI measurements if
450 	 * necessary.
451 	 */
452 	iwlagn_bt_coex_rssi_monitor(priv);
453 out:
454 	mutex_unlock(&priv->mutex);
455 }
456 
457 /*
458  * If BT sco traffic, and RSSI monitor is enabled, move measurements to the
459  * correct interface or disable it if this is the last interface to be
460  * removed.
461  */
iwlagn_bt_coex_rssi_monitor(struct iwl_priv * priv)462 void iwlagn_bt_coex_rssi_monitor(struct iwl_priv *priv)
463 {
464 	if (priv->bt_is_sco &&
465 	    priv->bt_traffic_load == IWL_BT_COEX_TRAFFIC_LOAD_CONTINUOUS)
466 		iwlagn_bt_adjust_rssi_monitor(priv, true);
467 	else
468 		iwlagn_bt_adjust_rssi_monitor(priv, false);
469 }
470 
iwlagn_print_uartmsg(struct iwl_priv * priv,struct iwl_bt_uart_msg * uart_msg)471 static void iwlagn_print_uartmsg(struct iwl_priv *priv,
472 				struct iwl_bt_uart_msg *uart_msg)
473 {
474 	IWL_DEBUG_COEX(priv, "Message Type = 0x%X, SSN = 0x%X, "
475 			"Update Req = 0x%X\n",
476 		(BT_UART_MSG_FRAME1MSGTYPE_MSK & uart_msg->frame1) >>
477 			BT_UART_MSG_FRAME1MSGTYPE_POS,
478 		(BT_UART_MSG_FRAME1SSN_MSK & uart_msg->frame1) >>
479 			BT_UART_MSG_FRAME1SSN_POS,
480 		(BT_UART_MSG_FRAME1UPDATEREQ_MSK & uart_msg->frame1) >>
481 			BT_UART_MSG_FRAME1UPDATEREQ_POS);
482 
483 	IWL_DEBUG_COEX(priv, "Open connections = 0x%X, Traffic load = 0x%X, "
484 			"Chl_SeqN = 0x%X, In band = 0x%X\n",
485 		(BT_UART_MSG_FRAME2OPENCONNECTIONS_MSK & uart_msg->frame2) >>
486 			BT_UART_MSG_FRAME2OPENCONNECTIONS_POS,
487 		(BT_UART_MSG_FRAME2TRAFFICLOAD_MSK & uart_msg->frame2) >>
488 			BT_UART_MSG_FRAME2TRAFFICLOAD_POS,
489 		(BT_UART_MSG_FRAME2CHLSEQN_MSK & uart_msg->frame2) >>
490 			BT_UART_MSG_FRAME2CHLSEQN_POS,
491 		(BT_UART_MSG_FRAME2INBAND_MSK & uart_msg->frame2) >>
492 			BT_UART_MSG_FRAME2INBAND_POS);
493 
494 	IWL_DEBUG_COEX(priv, "SCO/eSCO = 0x%X, Sniff = 0x%X, A2DP = 0x%X, "
495 			"ACL = 0x%X, Master = 0x%X, OBEX = 0x%X\n",
496 		(BT_UART_MSG_FRAME3SCOESCO_MSK & uart_msg->frame3) >>
497 			BT_UART_MSG_FRAME3SCOESCO_POS,
498 		(BT_UART_MSG_FRAME3SNIFF_MSK & uart_msg->frame3) >>
499 			BT_UART_MSG_FRAME3SNIFF_POS,
500 		(BT_UART_MSG_FRAME3A2DP_MSK & uart_msg->frame3) >>
501 			BT_UART_MSG_FRAME3A2DP_POS,
502 		(BT_UART_MSG_FRAME3ACL_MSK & uart_msg->frame3) >>
503 			BT_UART_MSG_FRAME3ACL_POS,
504 		(BT_UART_MSG_FRAME3MASTER_MSK & uart_msg->frame3) >>
505 			BT_UART_MSG_FRAME3MASTER_POS,
506 		(BT_UART_MSG_FRAME3OBEX_MSK & uart_msg->frame3) >>
507 			BT_UART_MSG_FRAME3OBEX_POS);
508 
509 	IWL_DEBUG_COEX(priv, "Idle duration = 0x%X\n",
510 		(BT_UART_MSG_FRAME4IDLEDURATION_MSK & uart_msg->frame4) >>
511 			BT_UART_MSG_FRAME4IDLEDURATION_POS);
512 
513 	IWL_DEBUG_COEX(priv, "Tx Activity = 0x%X, Rx Activity = 0x%X, "
514 			"eSCO Retransmissions = 0x%X\n",
515 		(BT_UART_MSG_FRAME5TXACTIVITY_MSK & uart_msg->frame5) >>
516 			BT_UART_MSG_FRAME5TXACTIVITY_POS,
517 		(BT_UART_MSG_FRAME5RXACTIVITY_MSK & uart_msg->frame5) >>
518 			BT_UART_MSG_FRAME5RXACTIVITY_POS,
519 		(BT_UART_MSG_FRAME5ESCORETRANSMIT_MSK & uart_msg->frame5) >>
520 			BT_UART_MSG_FRAME5ESCORETRANSMIT_POS);
521 
522 	IWL_DEBUG_COEX(priv, "Sniff Interval = 0x%X, Discoverable = 0x%X\n",
523 		(BT_UART_MSG_FRAME6SNIFFINTERVAL_MSK & uart_msg->frame6) >>
524 			BT_UART_MSG_FRAME6SNIFFINTERVAL_POS,
525 		(BT_UART_MSG_FRAME6DISCOVERABLE_MSK & uart_msg->frame6) >>
526 			BT_UART_MSG_FRAME6DISCOVERABLE_POS);
527 
528 	IWL_DEBUG_COEX(priv, "Sniff Activity = 0x%X, Page = "
529 			"0x%X, Inquiry = 0x%X, Connectable = 0x%X\n",
530 		(BT_UART_MSG_FRAME7SNIFFACTIVITY_MSK & uart_msg->frame7) >>
531 			BT_UART_MSG_FRAME7SNIFFACTIVITY_POS,
532 		(BT_UART_MSG_FRAME7PAGE_MSK & uart_msg->frame7) >>
533 			BT_UART_MSG_FRAME7PAGE_POS,
534 		(BT_UART_MSG_FRAME7INQUIRY_MSK & uart_msg->frame7) >>
535 			BT_UART_MSG_FRAME7INQUIRY_POS,
536 		(BT_UART_MSG_FRAME7CONNECTABLE_MSK & uart_msg->frame7) >>
537 			BT_UART_MSG_FRAME7CONNECTABLE_POS);
538 }
539 
iwlagn_set_kill_msk(struct iwl_priv * priv,struct iwl_bt_uart_msg * uart_msg)540 static bool iwlagn_set_kill_msk(struct iwl_priv *priv,
541 				struct iwl_bt_uart_msg *uart_msg)
542 {
543 	bool need_update = false;
544 	u8 kill_msk = IWL_BT_KILL_REDUCE;
545 	static const __le32 bt_kill_ack_msg[3] = {
546 		IWLAGN_BT_KILL_ACK_MASK_DEFAULT,
547 		IWLAGN_BT_KILL_ACK_CTS_MASK_SCO,
548 		IWLAGN_BT_KILL_ACK_CTS_MASK_REDUCE};
549 	static const __le32 bt_kill_cts_msg[3] = {
550 		IWLAGN_BT_KILL_CTS_MASK_DEFAULT,
551 		IWLAGN_BT_KILL_ACK_CTS_MASK_SCO,
552 		IWLAGN_BT_KILL_ACK_CTS_MASK_REDUCE};
553 
554 	if (!priv->reduced_txpower)
555 		kill_msk = (BT_UART_MSG_FRAME3SCOESCO_MSK & uart_msg->frame3)
556 			? IWL_BT_KILL_OVERRIDE : IWL_BT_KILL_DEFAULT;
557 	if (priv->kill_ack_mask != bt_kill_ack_msg[kill_msk] ||
558 	    priv->kill_cts_mask != bt_kill_cts_msg[kill_msk]) {
559 		priv->bt_valid |= IWLAGN_BT_VALID_KILL_ACK_MASK;
560 		priv->kill_ack_mask = bt_kill_ack_msg[kill_msk];
561 		priv->bt_valid |= IWLAGN_BT_VALID_KILL_CTS_MASK;
562 		priv->kill_cts_mask = bt_kill_cts_msg[kill_msk];
563 		need_update = true;
564 	}
565 	return need_update;
566 }
567 
568 /*
569  * Upon RSSI changes, sends a bt config command with following changes
570  *  1. enable/disable "reduced control frames tx power
571  *  2. update the "kill)ack_mask" and "kill_cts_mask"
572  *
573  * If "reduced tx power" is enabled, uCode shall
574  *  1. ACK/Back/CTS rate shall reduced to 6Mbps
575  *  2. not use duplciate 20/40MHz mode
576  */
iwlagn_fill_txpower_mode(struct iwl_priv * priv,struct iwl_bt_uart_msg * uart_msg)577 static bool iwlagn_fill_txpower_mode(struct iwl_priv *priv,
578 				struct iwl_bt_uart_msg *uart_msg)
579 {
580 	bool need_update = false;
581 	struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
582 	int ave_rssi;
583 
584 	if (!ctx->vif || (ctx->vif->type != NL80211_IFTYPE_STATION)) {
585 		IWL_DEBUG_INFO(priv, "BSS ctx not active or not in sta mode\n");
586 		return false;
587 	}
588 
589 	ave_rssi = ieee80211_ave_rssi(ctx->vif);
590 	if (!ave_rssi) {
591 		/* no rssi data, no changes to reduce tx power */
592 		IWL_DEBUG_COEX(priv, "no rssi data available\n");
593 		return need_update;
594 	}
595 	if (!priv->reduced_txpower &&
596 	    !iwl_is_associated(priv, IWL_RXON_CTX_PAN) &&
597 	    (ave_rssi > BT_ENABLE_REDUCED_TXPOWER_THRESHOLD) &&
598 	    (uart_msg->frame3 & (BT_UART_MSG_FRAME3ACL_MSK |
599 	    BT_UART_MSG_FRAME3OBEX_MSK)) &&
600 	    !(uart_msg->frame3 & (BT_UART_MSG_FRAME3SCOESCO_MSK |
601 	    BT_UART_MSG_FRAME3SNIFF_MSK | BT_UART_MSG_FRAME3A2DP_MSK))) {
602 		/* enabling reduced tx power */
603 		priv->reduced_txpower = true;
604 		priv->bt_valid |= IWLAGN_BT_VALID_REDUCED_TX_PWR;
605 		need_update = true;
606 	} else if (priv->reduced_txpower &&
607 		   (iwl_is_associated(priv, IWL_RXON_CTX_PAN) ||
608 		   (ave_rssi < BT_DISABLE_REDUCED_TXPOWER_THRESHOLD) ||
609 		   (uart_msg->frame3 & (BT_UART_MSG_FRAME3SCOESCO_MSK |
610 		   BT_UART_MSG_FRAME3SNIFF_MSK | BT_UART_MSG_FRAME3A2DP_MSK)) ||
611 		   !(uart_msg->frame3 & (BT_UART_MSG_FRAME3ACL_MSK |
612 		   BT_UART_MSG_FRAME3OBEX_MSK)))) {
613 		/* disable reduced tx power */
614 		priv->reduced_txpower = false;
615 		priv->bt_valid |= IWLAGN_BT_VALID_REDUCED_TX_PWR;
616 		need_update = true;
617 	}
618 
619 	return need_update;
620 }
621 
iwlagn_bt_coex_profile_notif(struct iwl_priv * priv,struct iwl_rx_cmd_buffer * rxb)622 static void iwlagn_bt_coex_profile_notif(struct iwl_priv *priv,
623 					 struct iwl_rx_cmd_buffer *rxb)
624 {
625 	struct iwl_rx_packet *pkt = rxb_addr(rxb);
626 	struct iwl_bt_coex_profile_notif *coex = (void *)pkt->data;
627 	struct iwl_bt_uart_msg *uart_msg = &coex->last_bt_uart_msg;
628 
629 	if (priv->bt_enable_flag == IWLAGN_BT_FLAG_COEX_MODE_DISABLED) {
630 		/* bt coex disabled */
631 		return;
632 	}
633 
634 	IWL_DEBUG_COEX(priv, "BT Coex notification:\n");
635 	IWL_DEBUG_COEX(priv, "    status: %d\n", coex->bt_status);
636 	IWL_DEBUG_COEX(priv, "    traffic load: %d\n", coex->bt_traffic_load);
637 	IWL_DEBUG_COEX(priv, "    CI compliance: %d\n",
638 			coex->bt_ci_compliance);
639 	iwlagn_print_uartmsg(priv, uart_msg);
640 
641 	priv->last_bt_traffic_load = priv->bt_traffic_load;
642 	priv->bt_is_sco = iwlagn_bt_traffic_is_sco(uart_msg);
643 
644 	if (priv->iw_mode != NL80211_IFTYPE_ADHOC) {
645 		if (priv->bt_status != coex->bt_status ||
646 		    priv->last_bt_traffic_load != coex->bt_traffic_load) {
647 			if (coex->bt_status) {
648 				/* BT on */
649 				if (!priv->bt_ch_announce)
650 					priv->bt_traffic_load =
651 						IWL_BT_COEX_TRAFFIC_LOAD_HIGH;
652 				else
653 					priv->bt_traffic_load =
654 						coex->bt_traffic_load;
655 			} else {
656 				/* BT off */
657 				priv->bt_traffic_load =
658 					IWL_BT_COEX_TRAFFIC_LOAD_NONE;
659 			}
660 			priv->bt_status = coex->bt_status;
661 			queue_work(priv->workqueue,
662 				   &priv->bt_traffic_change_work);
663 		}
664 	}
665 
666 	/* schedule to send runtime bt_config */
667 	/* check reduce power before change ack/cts kill mask */
668 	if (iwlagn_fill_txpower_mode(priv, uart_msg) ||
669 	    iwlagn_set_kill_msk(priv, uart_msg))
670 		queue_work(priv->workqueue, &priv->bt_runtime_config);
671 
672 
673 	/* FIXME: based on notification, adjust the prio_boost */
674 
675 	priv->bt_ci_compliance = coex->bt_ci_compliance;
676 }
677 
iwlagn_bt_rx_handler_setup(struct iwl_priv * priv)678 void iwlagn_bt_rx_handler_setup(struct iwl_priv *priv)
679 {
680 	priv->rx_handlers[REPLY_BT_COEX_PROFILE_NOTIF] =
681 		iwlagn_bt_coex_profile_notif;
682 }
683 
iwlagn_bt_setup_deferred_work(struct iwl_priv * priv)684 void iwlagn_bt_setup_deferred_work(struct iwl_priv *priv)
685 {
686 	INIT_WORK(&priv->bt_traffic_change_work,
687 		  iwlagn_bt_traffic_change_work);
688 }
689 
iwlagn_bt_cancel_deferred_work(struct iwl_priv * priv)690 void iwlagn_bt_cancel_deferred_work(struct iwl_priv *priv)
691 {
692 	cancel_work_sync(&priv->bt_traffic_change_work);
693 }
694 
is_single_rx_stream(struct iwl_priv * priv)695 static bool is_single_rx_stream(struct iwl_priv *priv)
696 {
697 	return priv->current_ht_config.smps == IEEE80211_SMPS_STATIC ||
698 	       priv->current_ht_config.single_chain_sufficient;
699 }
700 
701 #define IWL_NUM_RX_CHAINS_MULTIPLE	3
702 #define IWL_NUM_RX_CHAINS_SINGLE	2
703 #define IWL_NUM_IDLE_CHAINS_DUAL	2
704 #define IWL_NUM_IDLE_CHAINS_SINGLE	1
705 
706 /*
707  * Determine how many receiver/antenna chains to use.
708  *
709  * More provides better reception via diversity.  Fewer saves power
710  * at the expense of throughput, but only when not in powersave to
711  * start with.
712  *
713  * MIMO (dual stream) requires at least 2, but works better with 3.
714  * This does not determine *which* chains to use, just how many.
715  */
iwl_get_active_rx_chain_count(struct iwl_priv * priv)716 static int iwl_get_active_rx_chain_count(struct iwl_priv *priv)
717 {
718 	if (priv->lib->bt_params &&
719 	    priv->lib->bt_params->advanced_bt_coexist &&
720 	    (priv->bt_full_concurrent ||
721 	     priv->bt_traffic_load >= IWL_BT_COEX_TRAFFIC_LOAD_HIGH)) {
722 		/*
723 		 * only use chain 'A' in bt high traffic load or
724 		 * full concurrency mode
725 		 */
726 		return IWL_NUM_RX_CHAINS_SINGLE;
727 	}
728 	/* # of Rx chains to use when expecting MIMO. */
729 	if (is_single_rx_stream(priv))
730 		return IWL_NUM_RX_CHAINS_SINGLE;
731 	else
732 		return IWL_NUM_RX_CHAINS_MULTIPLE;
733 }
734 
735 /*
736  * When we are in power saving mode, unless device support spatial
737  * multiplexing power save, use the active count for rx chain count.
738  */
iwl_get_idle_rx_chain_count(struct iwl_priv * priv,int active_cnt)739 static int iwl_get_idle_rx_chain_count(struct iwl_priv *priv, int active_cnt)
740 {
741 	/* # Rx chains when idling, depending on SMPS mode */
742 	switch (priv->current_ht_config.smps) {
743 	case IEEE80211_SMPS_STATIC:
744 	case IEEE80211_SMPS_DYNAMIC:
745 		return IWL_NUM_IDLE_CHAINS_SINGLE;
746 	case IEEE80211_SMPS_AUTOMATIC:
747 	case IEEE80211_SMPS_OFF:
748 		return active_cnt;
749 	default:
750 		WARN(1, "invalid SMPS mode %d",
751 		     priv->current_ht_config.smps);
752 		return active_cnt;
753 	}
754 }
755 
756 /* up to 4 chains */
iwl_count_chain_bitmap(u32 chain_bitmap)757 static u8 iwl_count_chain_bitmap(u32 chain_bitmap)
758 {
759 	u8 res;
760 	res = (chain_bitmap & BIT(0)) >> 0;
761 	res += (chain_bitmap & BIT(1)) >> 1;
762 	res += (chain_bitmap & BIT(2)) >> 2;
763 	res += (chain_bitmap & BIT(3)) >> 3;
764 	return res;
765 }
766 
767 /*
768  * iwlagn_set_rxon_chain - Set up Rx chain usage in "staging" RXON image
769  *
770  * Selects how many and which Rx receivers/antennas/chains to use.
771  * This should not be used for scan command ... it puts data in wrong place.
772  */
iwlagn_set_rxon_chain(struct iwl_priv * priv,struct iwl_rxon_context * ctx)773 void iwlagn_set_rxon_chain(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
774 {
775 	bool is_single = is_single_rx_stream(priv);
776 	bool is_cam = !test_bit(STATUS_POWER_PMI, &priv->status);
777 	u8 idle_rx_cnt, active_rx_cnt, valid_rx_cnt;
778 	u32 active_chains;
779 	u16 rx_chain;
780 
781 	/* Tell uCode which antennas are actually connected.
782 	 * Before first association, we assume all antennas are connected.
783 	 * Just after first association, iwl_chain_noise_calibration()
784 	 *    checks which antennas actually *are* connected. */
785 	if (priv->chain_noise_data.active_chains)
786 		active_chains = priv->chain_noise_data.active_chains;
787 	else
788 		active_chains = priv->nvm_data->valid_rx_ant;
789 
790 	if (priv->lib->bt_params &&
791 	    priv->lib->bt_params->advanced_bt_coexist &&
792 	    (priv->bt_full_concurrent ||
793 	     priv->bt_traffic_load >= IWL_BT_COEX_TRAFFIC_LOAD_HIGH)) {
794 		/*
795 		 * only use chain 'A' in bt high traffic load or
796 		 * full concurrency mode
797 		 */
798 		active_chains = first_antenna(active_chains);
799 	}
800 
801 	rx_chain = active_chains << RXON_RX_CHAIN_VALID_POS;
802 
803 	/* How many receivers should we use? */
804 	active_rx_cnt = iwl_get_active_rx_chain_count(priv);
805 	idle_rx_cnt = iwl_get_idle_rx_chain_count(priv, active_rx_cnt);
806 
807 
808 	/* correct rx chain count according hw settings
809 	 * and chain noise calibration
810 	 */
811 	valid_rx_cnt = iwl_count_chain_bitmap(active_chains);
812 	if (valid_rx_cnt < active_rx_cnt)
813 		active_rx_cnt = valid_rx_cnt;
814 
815 	if (valid_rx_cnt < idle_rx_cnt)
816 		idle_rx_cnt = valid_rx_cnt;
817 
818 	rx_chain |= active_rx_cnt << RXON_RX_CHAIN_MIMO_CNT_POS;
819 	rx_chain |= idle_rx_cnt  << RXON_RX_CHAIN_CNT_POS;
820 
821 	ctx->staging.rx_chain = cpu_to_le16(rx_chain);
822 
823 	if (!is_single && (active_rx_cnt >= IWL_NUM_RX_CHAINS_SINGLE) && is_cam)
824 		ctx->staging.rx_chain |= RXON_RX_CHAIN_MIMO_FORCE_MSK;
825 	else
826 		ctx->staging.rx_chain &= ~RXON_RX_CHAIN_MIMO_FORCE_MSK;
827 
828 	IWL_DEBUG_ASSOC(priv, "rx_chain=0x%X active=%d idle=%d\n",
829 			ctx->staging.rx_chain,
830 			active_rx_cnt, idle_rx_cnt);
831 
832 	WARN_ON(active_rx_cnt == 0 || idle_rx_cnt == 0 ||
833 		active_rx_cnt < idle_rx_cnt);
834 }
835 
iwl_toggle_tx_ant(struct iwl_priv * priv,u8 ant,u8 valid)836 u8 iwl_toggle_tx_ant(struct iwl_priv *priv, u8 ant, u8 valid)
837 {
838 	int i;
839 	u8 ind = ant;
840 
841 	if (priv->band == NL80211_BAND_2GHZ &&
842 	    priv->bt_traffic_load >= IWL_BT_COEX_TRAFFIC_LOAD_HIGH)
843 		return 0;
844 
845 	for (i = 0; i < RATE_ANT_NUM - 1; i++) {
846 		ind = (ind + 1) < RATE_ANT_NUM ?  ind + 1 : 0;
847 		if (valid & BIT(ind))
848 			return ind;
849 	}
850 	return ant;
851 }
852 
853 #ifdef CONFIG_PM_SLEEP
iwlagn_convert_p1k(u16 * p1k,__le16 * out)854 static void iwlagn_convert_p1k(u16 *p1k, __le16 *out)
855 {
856 	int i;
857 
858 	for (i = 0; i < IWLAGN_P1K_SIZE; i++)
859 		out[i] = cpu_to_le16(p1k[i]);
860 }
861 
862 struct wowlan_key_data {
863 	struct iwl_rxon_context *ctx;
864 	struct iwlagn_wowlan_rsc_tsc_params_cmd *rsc_tsc;
865 	struct iwlagn_wowlan_tkip_params_cmd *tkip;
866 	const u8 *bssid;
867 	bool error, use_rsc_tsc, use_tkip;
868 };
869 
870 
iwlagn_wowlan_program_keys(struct ieee80211_hw * hw,struct ieee80211_vif * vif,struct ieee80211_sta * sta,struct ieee80211_key_conf * key,void * _data)871 static void iwlagn_wowlan_program_keys(struct ieee80211_hw *hw,
872 			       struct ieee80211_vif *vif,
873 			       struct ieee80211_sta *sta,
874 			       struct ieee80211_key_conf *key,
875 			       void *_data)
876 {
877 	struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
878 	struct wowlan_key_data *data = _data;
879 	struct iwl_rxon_context *ctx = data->ctx;
880 	struct aes_sc *aes_sc, *aes_tx_sc = NULL;
881 	struct tkip_sc *tkip_sc, *tkip_tx_sc = NULL;
882 	struct iwlagn_p1k_cache *rx_p1ks;
883 	u8 *rx_mic_key;
884 	struct ieee80211_key_seq seq;
885 	u32 cur_rx_iv32 = 0;
886 	u16 p1k[IWLAGN_P1K_SIZE];
887 	int ret, i;
888 
889 	mutex_lock(&priv->mutex);
890 
891 	if ((key->cipher == WLAN_CIPHER_SUITE_WEP40 ||
892 	     key->cipher == WLAN_CIPHER_SUITE_WEP104) &&
893 	     !sta && !ctx->key_mapping_keys)
894 		ret = iwl_set_default_wep_key(priv, ctx, key);
895 	else
896 		ret = iwl_set_dynamic_key(priv, ctx, key, sta);
897 
898 	if (ret) {
899 		IWL_ERR(priv, "Error setting key during suspend!\n");
900 		data->error = true;
901 	}
902 
903 	switch (key->cipher) {
904 	case WLAN_CIPHER_SUITE_TKIP:
905 		if (sta) {
906 			u64 pn64;
907 
908 			tkip_sc = data->rsc_tsc->all_tsc_rsc.tkip.unicast_rsc;
909 			tkip_tx_sc = &data->rsc_tsc->all_tsc_rsc.tkip.tsc;
910 
911 			rx_p1ks = data->tkip->rx_uni;
912 
913 			pn64 = atomic64_read(&key->tx_pn);
914 			tkip_tx_sc->iv16 = cpu_to_le16(TKIP_PN_TO_IV16(pn64));
915 			tkip_tx_sc->iv32 = cpu_to_le32(TKIP_PN_TO_IV32(pn64));
916 
917 			ieee80211_get_tkip_p1k_iv(key, seq.tkip.iv32, p1k);
918 			iwlagn_convert_p1k(p1k, data->tkip->tx.p1k);
919 
920 			memcpy(data->tkip->mic_keys.tx,
921 			       &key->key[NL80211_TKIP_DATA_OFFSET_TX_MIC_KEY],
922 			       IWLAGN_MIC_KEY_SIZE);
923 
924 			rx_mic_key = data->tkip->mic_keys.rx_unicast;
925 		} else {
926 			tkip_sc =
927 				data->rsc_tsc->all_tsc_rsc.tkip.multicast_rsc;
928 			rx_p1ks = data->tkip->rx_multi;
929 			rx_mic_key = data->tkip->mic_keys.rx_mcast;
930 		}
931 
932 		/*
933 		 * For non-QoS this relies on the fact that both the uCode and
934 		 * mac80211 use TID 0 (as they need to to avoid replay attacks)
935 		 * for checking the IV in the frames.
936 		 */
937 		for (i = 0; i < IWLAGN_NUM_RSC; i++) {
938 			ieee80211_get_key_rx_seq(key, i, &seq);
939 			tkip_sc[i].iv16 = cpu_to_le16(seq.tkip.iv16);
940 			tkip_sc[i].iv32 = cpu_to_le32(seq.tkip.iv32);
941 			/* wrapping isn't allowed, AP must rekey */
942 			if (seq.tkip.iv32 > cur_rx_iv32)
943 				cur_rx_iv32 = seq.tkip.iv32;
944 		}
945 
946 		ieee80211_get_tkip_rx_p1k(key, data->bssid, cur_rx_iv32, p1k);
947 		iwlagn_convert_p1k(p1k, rx_p1ks[0].p1k);
948 		ieee80211_get_tkip_rx_p1k(key, data->bssid,
949 					  cur_rx_iv32 + 1, p1k);
950 		iwlagn_convert_p1k(p1k, rx_p1ks[1].p1k);
951 
952 		memcpy(rx_mic_key,
953 		       &key->key[NL80211_TKIP_DATA_OFFSET_RX_MIC_KEY],
954 		       IWLAGN_MIC_KEY_SIZE);
955 
956 		data->use_tkip = true;
957 		data->use_rsc_tsc = true;
958 		break;
959 	case WLAN_CIPHER_SUITE_CCMP:
960 		if (sta) {
961 			u64 pn64;
962 
963 			aes_sc = data->rsc_tsc->all_tsc_rsc.aes.unicast_rsc;
964 			aes_tx_sc = &data->rsc_tsc->all_tsc_rsc.aes.tsc;
965 
966 			pn64 = atomic64_read(&key->tx_pn);
967 			aes_tx_sc->pn = cpu_to_le64(pn64);
968 		} else
969 			aes_sc = data->rsc_tsc->all_tsc_rsc.aes.multicast_rsc;
970 
971 		/*
972 		 * For non-QoS this relies on the fact that both the uCode and
973 		 * mac80211 use TID 0 for checking the IV in the frames.
974 		 */
975 		for (i = 0; i < IWLAGN_NUM_RSC; i++) {
976 			u8 *pn = seq.ccmp.pn;
977 
978 			ieee80211_get_key_rx_seq(key, i, &seq);
979 			aes_sc[i].pn = cpu_to_le64(
980 					(u64)pn[5] |
981 					((u64)pn[4] << 8) |
982 					((u64)pn[3] << 16) |
983 					((u64)pn[2] << 24) |
984 					((u64)pn[1] << 32) |
985 					((u64)pn[0] << 40));
986 		}
987 		data->use_rsc_tsc = true;
988 		break;
989 	}
990 
991 	mutex_unlock(&priv->mutex);
992 }
993 
iwlagn_send_patterns(struct iwl_priv * priv,struct cfg80211_wowlan * wowlan)994 int iwlagn_send_patterns(struct iwl_priv *priv,
995 			struct cfg80211_wowlan *wowlan)
996 {
997 	struct iwlagn_wowlan_patterns_cmd *pattern_cmd;
998 	struct iwl_host_cmd cmd = {
999 		.id = REPLY_WOWLAN_PATTERNS,
1000 		.dataflags[0] = IWL_HCMD_DFL_NOCOPY,
1001 	};
1002 	int i, err;
1003 
1004 	if (!wowlan->n_patterns)
1005 		return 0;
1006 
1007 	cmd.len[0] = struct_size(pattern_cmd, patterns, wowlan->n_patterns);
1008 
1009 	pattern_cmd = kmalloc(cmd.len[0], GFP_KERNEL);
1010 	if (!pattern_cmd)
1011 		return -ENOMEM;
1012 
1013 	pattern_cmd->n_patterns = cpu_to_le32(wowlan->n_patterns);
1014 
1015 	for (i = 0; i < wowlan->n_patterns; i++) {
1016 		int mask_len = DIV_ROUND_UP(wowlan->patterns[i].pattern_len, 8);
1017 
1018 		memcpy(&pattern_cmd->patterns[i].mask,
1019 			wowlan->patterns[i].mask, mask_len);
1020 		memcpy(&pattern_cmd->patterns[i].pattern,
1021 			wowlan->patterns[i].pattern,
1022 			wowlan->patterns[i].pattern_len);
1023 		pattern_cmd->patterns[i].mask_size = mask_len;
1024 		pattern_cmd->patterns[i].pattern_size =
1025 			wowlan->patterns[i].pattern_len;
1026 	}
1027 
1028 	cmd.data[0] = pattern_cmd;
1029 	err = iwl_dvm_send_cmd(priv, &cmd);
1030 	kfree(pattern_cmd);
1031 	return err;
1032 }
1033 
iwlagn_suspend(struct iwl_priv * priv,struct cfg80211_wowlan * wowlan)1034 int iwlagn_suspend(struct iwl_priv *priv, struct cfg80211_wowlan *wowlan)
1035 {
1036 	struct iwlagn_wowlan_wakeup_filter_cmd wakeup_filter_cmd;
1037 	struct iwl_rxon_cmd rxon;
1038 	struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
1039 	struct iwlagn_wowlan_kek_kck_material_cmd kek_kck_cmd;
1040 	struct iwlagn_wowlan_tkip_params_cmd tkip_cmd = {};
1041 	struct iwlagn_d3_config_cmd d3_cfg_cmd = {
1042 		/*
1043 		 * Program the minimum sleep time to 10 seconds, as many
1044 		 * platforms have issues processing a wakeup signal while
1045 		 * still being in the process of suspending.
1046 		 */
1047 		.min_sleep_time = cpu_to_le32(10 * 1000 * 1000),
1048 	};
1049 	struct wowlan_key_data key_data = {
1050 		.ctx = ctx,
1051 		.bssid = ctx->active.bssid_addr,
1052 		.use_rsc_tsc = false,
1053 		.tkip = &tkip_cmd,
1054 		.use_tkip = false,
1055 	};
1056 	int ret, i;
1057 	u16 seq;
1058 
1059 	key_data.rsc_tsc = kzalloc(sizeof(*key_data.rsc_tsc), GFP_KERNEL);
1060 	if (!key_data.rsc_tsc)
1061 		return -ENOMEM;
1062 
1063 	memset(&wakeup_filter_cmd, 0, sizeof(wakeup_filter_cmd));
1064 
1065 	/*
1066 	 * We know the last used seqno, and the uCode expects to know that
1067 	 * one, it will increment before TX.
1068 	 */
1069 	seq = le16_to_cpu(priv->last_seq_ctl) & IEEE80211_SCTL_SEQ;
1070 	wakeup_filter_cmd.non_qos_seq = cpu_to_le16(seq);
1071 
1072 	/*
1073 	 * For QoS counters, we store the one to use next, so subtract 0x10
1074 	 * since the uCode will add 0x10 before using the value.
1075 	 */
1076 	for (i = 0; i < IWL_MAX_TID_COUNT; i++) {
1077 		seq = priv->tid_data[IWL_AP_ID][i].seq_number;
1078 		seq -= 0x10;
1079 		wakeup_filter_cmd.qos_seq[i] = cpu_to_le16(seq);
1080 	}
1081 
1082 	if (wowlan->disconnect)
1083 		wakeup_filter_cmd.enabled |=
1084 			cpu_to_le32(IWLAGN_WOWLAN_WAKEUP_BEACON_MISS |
1085 				    IWLAGN_WOWLAN_WAKEUP_LINK_CHANGE);
1086 	if (wowlan->magic_pkt)
1087 		wakeup_filter_cmd.enabled |=
1088 			cpu_to_le32(IWLAGN_WOWLAN_WAKEUP_MAGIC_PACKET);
1089 	if (wowlan->gtk_rekey_failure)
1090 		wakeup_filter_cmd.enabled |=
1091 			cpu_to_le32(IWLAGN_WOWLAN_WAKEUP_GTK_REKEY_FAIL);
1092 	if (wowlan->eap_identity_req)
1093 		wakeup_filter_cmd.enabled |=
1094 			cpu_to_le32(IWLAGN_WOWLAN_WAKEUP_EAP_IDENT_REQ);
1095 	if (wowlan->four_way_handshake)
1096 		wakeup_filter_cmd.enabled |=
1097 			cpu_to_le32(IWLAGN_WOWLAN_WAKEUP_4WAY_HANDSHAKE);
1098 	if (wowlan->n_patterns)
1099 		wakeup_filter_cmd.enabled |=
1100 			cpu_to_le32(IWLAGN_WOWLAN_WAKEUP_PATTERN_MATCH);
1101 
1102 	if (wowlan->rfkill_release)
1103 		d3_cfg_cmd.wakeup_flags |=
1104 			cpu_to_le32(IWLAGN_D3_WAKEUP_RFKILL);
1105 
1106 	iwl_scan_cancel_timeout(priv, 200);
1107 
1108 	memcpy(&rxon, &ctx->active, sizeof(rxon));
1109 
1110 	priv->ucode_loaded = false;
1111 	iwl_trans_stop_device(priv->trans);
1112 	ret = iwl_trans_start_hw(priv->trans);
1113 	if (ret)
1114 		goto out;
1115 
1116 	priv->wowlan = true;
1117 
1118 	ret = iwl_load_ucode_wait_alive(priv, IWL_UCODE_WOWLAN);
1119 	if (ret)
1120 		goto out;
1121 
1122 	/* now configure WoWLAN ucode */
1123 	ret = iwl_alive_start(priv);
1124 	if (ret)
1125 		goto out;
1126 
1127 	memcpy(&ctx->staging, &rxon, sizeof(rxon));
1128 	ret = iwlagn_commit_rxon(priv, ctx);
1129 	if (ret)
1130 		goto out;
1131 
1132 	ret = iwl_power_update_mode(priv, true);
1133 	if (ret)
1134 		goto out;
1135 
1136 	if (!iwlwifi_mod_params.swcrypto) {
1137 		/* mark all keys clear */
1138 		priv->ucode_key_table = 0;
1139 		ctx->key_mapping_keys = 0;
1140 
1141 		/*
1142 		 * This needs to be unlocked due to lock ordering
1143 		 * constraints. Since we're in the suspend path
1144 		 * that isn't really a problem though.
1145 		 */
1146 		mutex_unlock(&priv->mutex);
1147 		ieee80211_iter_keys(priv->hw, ctx->vif,
1148 				    iwlagn_wowlan_program_keys,
1149 				    &key_data);
1150 		mutex_lock(&priv->mutex);
1151 		if (key_data.error) {
1152 			ret = -EIO;
1153 			goto out;
1154 		}
1155 
1156 		if (key_data.use_rsc_tsc) {
1157 			struct iwl_host_cmd rsc_tsc_cmd = {
1158 				.id = REPLY_WOWLAN_TSC_RSC_PARAMS,
1159 				.data[0] = key_data.rsc_tsc,
1160 				.dataflags[0] = IWL_HCMD_DFL_NOCOPY,
1161 				.len[0] = sizeof(*key_data.rsc_tsc),
1162 			};
1163 
1164 			ret = iwl_dvm_send_cmd(priv, &rsc_tsc_cmd);
1165 			if (ret)
1166 				goto out;
1167 		}
1168 
1169 		if (key_data.use_tkip) {
1170 			ret = iwl_dvm_send_cmd_pdu(priv,
1171 						 REPLY_WOWLAN_TKIP_PARAMS,
1172 						 0, sizeof(tkip_cmd),
1173 						 &tkip_cmd);
1174 			if (ret)
1175 				goto out;
1176 		}
1177 
1178 		if (priv->have_rekey_data) {
1179 			memset(&kek_kck_cmd, 0, sizeof(kek_kck_cmd));
1180 			memcpy(kek_kck_cmd.kck, priv->kck, NL80211_KCK_LEN);
1181 			kek_kck_cmd.kck_len = cpu_to_le16(NL80211_KCK_LEN);
1182 			memcpy(kek_kck_cmd.kek, priv->kek, NL80211_KEK_LEN);
1183 			kek_kck_cmd.kek_len = cpu_to_le16(NL80211_KEK_LEN);
1184 			kek_kck_cmd.replay_ctr = priv->replay_ctr;
1185 
1186 			ret = iwl_dvm_send_cmd_pdu(priv,
1187 						 REPLY_WOWLAN_KEK_KCK_MATERIAL,
1188 						 0, sizeof(kek_kck_cmd),
1189 						 &kek_kck_cmd);
1190 			if (ret)
1191 				goto out;
1192 		}
1193 	}
1194 
1195 	ret = iwl_dvm_send_cmd_pdu(priv, REPLY_D3_CONFIG, 0,
1196 				     sizeof(d3_cfg_cmd), &d3_cfg_cmd);
1197 	if (ret)
1198 		goto out;
1199 
1200 	ret = iwl_dvm_send_cmd_pdu(priv, REPLY_WOWLAN_WAKEUP_FILTER,
1201 				 0, sizeof(wakeup_filter_cmd),
1202 				 &wakeup_filter_cmd);
1203 	if (ret)
1204 		goto out;
1205 
1206 	ret = iwlagn_send_patterns(priv, wowlan);
1207  out:
1208 	kfree(key_data.rsc_tsc);
1209 	return ret;
1210 }
1211 #endif
1212 
iwl_dvm_send_cmd(struct iwl_priv * priv,struct iwl_host_cmd * cmd)1213 int iwl_dvm_send_cmd(struct iwl_priv *priv, struct iwl_host_cmd *cmd)
1214 {
1215 	if (iwl_is_rfkill(priv) || iwl_is_ctkill(priv)) {
1216 		IWL_WARN(priv, "Not sending command - %s KILL\n",
1217 			 iwl_is_rfkill(priv) ? "RF" : "CT");
1218 		return -EIO;
1219 	}
1220 
1221 	if (test_bit(STATUS_FW_ERROR, &priv->status)) {
1222 		IWL_ERR(priv, "Command %s failed: FW Error\n",
1223 			iwl_get_cmd_string(priv->trans, cmd->id));
1224 		return -EIO;
1225 	}
1226 
1227 	/*
1228 	 * This can happen upon FW ASSERT: we clear the STATUS_FW_ERROR flag
1229 	 * in iwl_down but cancel the workers only later.
1230 	 */
1231 	if (!priv->ucode_loaded) {
1232 		IWL_ERR(priv, "Fw not loaded - dropping CMD: %x\n", cmd->id);
1233 		return -EIO;
1234 	}
1235 
1236 	/*
1237 	 * Synchronous commands from this op-mode must hold
1238 	 * the mutex, this ensures we don't try to send two
1239 	 * (or more) synchronous commands at a time.
1240 	 */
1241 	if (!(cmd->flags & CMD_ASYNC))
1242 		lockdep_assert_held(&priv->mutex);
1243 
1244 	return iwl_trans_send_cmd(priv->trans, cmd);
1245 }
1246 
iwl_dvm_send_cmd_pdu(struct iwl_priv * priv,u8 id,u32 flags,u16 len,const void * data)1247 int iwl_dvm_send_cmd_pdu(struct iwl_priv *priv, u8 id,
1248 			 u32 flags, u16 len, const void *data)
1249 {
1250 	struct iwl_host_cmd cmd = {
1251 		.id = id,
1252 		.len = { len, },
1253 		.data = { data, },
1254 		.flags = flags,
1255 	};
1256 
1257 	return iwl_dvm_send_cmd(priv, &cmd);
1258 }
1259