xref: /linux/drivers/net/wireless/intel/iwlwifi/dvm/main.c (revision 8be4d31cb8aaeea27bde4b7ddb26e28a89062ebf)
1 // SPDX-License-Identifier: GPL-2.0-only
2 /******************************************************************************
3  *
4  * Copyright(c) 2003 - 2014, 2018 - 2022 Intel Corporation. All rights reserved.
5  * Copyright(c) 2024-2025 Intel Corporation. All rights reserved.
6  * Copyright(c) 2015 Intel Deutschland GmbH
7  *
8  * Portions of this file are derived from the ipw3945 project, as well
9  * as portions of the ieee80211 subsystem header files.
10  *****************************************************************************/
11 
12 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
13 
14 #include <linux/kernel.h>
15 #include <linux/module.h>
16 #include <linux/init.h>
17 #include <linux/slab.h>
18 #include <linux/delay.h>
19 #include <linux/sched.h>
20 #include <linux/skbuff.h>
21 #include <linux/netdevice.h>
22 #include <linux/etherdevice.h>
23 #include <linux/if_arp.h>
24 
25 #include <net/mac80211.h>
26 
27 #include <asm/div64.h>
28 
29 #include "iwl-nvm-utils.h"
30 #include "iwl-io.h"
31 #include "iwl-trans.h"
32 #include "iwl-op-mode.h"
33 #include "iwl-drv.h"
34 #include "iwl-modparams.h"
35 #include "iwl-prph.h"
36 
37 #include "dev.h"
38 #include "calib.h"
39 #include "agn.h"
40 
41 
42 /******************************************************************************
43  *
44  * module boiler plate
45  *
46  ******************************************************************************/
47 
48 #define DRV_DESCRIPTION	"Intel(R) Wireless WiFi Link AGN driver for Linux"
49 MODULE_DESCRIPTION(DRV_DESCRIPTION);
50 MODULE_LICENSE("GPL");
51 MODULE_IMPORT_NS("IWLWIFI");
52 
53 /* Please keep this array *SORTED* by hex value.
54  * Access is done through binary search.
55  * A warning will be triggered on violation.
56  */
57 static const struct iwl_hcmd_names iwl_dvm_cmd_names[] = {
58 	HCMD_NAME(REPLY_ALIVE),
59 	HCMD_NAME(REPLY_ERROR),
60 	HCMD_NAME(REPLY_ECHO),
61 	HCMD_NAME(REPLY_RXON),
62 	HCMD_NAME(REPLY_RXON_ASSOC),
63 	HCMD_NAME(REPLY_QOS_PARAM),
64 	HCMD_NAME(REPLY_RXON_TIMING),
65 	HCMD_NAME(REPLY_ADD_STA),
66 	HCMD_NAME(REPLY_REMOVE_STA),
67 	HCMD_NAME(REPLY_REMOVE_ALL_STA),
68 	HCMD_NAME(REPLY_TX),
69 	HCMD_NAME(REPLY_TXFIFO_FLUSH),
70 	HCMD_NAME(REPLY_WEPKEY),
71 	HCMD_NAME(REPLY_LEDS_CMD),
72 	HCMD_NAME(REPLY_TX_LINK_QUALITY_CMD),
73 	HCMD_NAME(COEX_PRIORITY_TABLE_CMD),
74 	HCMD_NAME(COEX_MEDIUM_NOTIFICATION),
75 	HCMD_NAME(COEX_EVENT_CMD),
76 	HCMD_NAME(TEMPERATURE_NOTIFICATION),
77 	HCMD_NAME(CALIBRATION_CFG_CMD),
78 	HCMD_NAME(CALIBRATION_RES_NOTIFICATION),
79 	HCMD_NAME(CALIBRATION_COMPLETE_NOTIFICATION),
80 	HCMD_NAME(REPLY_QUIET_CMD),
81 	HCMD_NAME(REPLY_CHANNEL_SWITCH),
82 	HCMD_NAME(CHANNEL_SWITCH_NOTIFICATION),
83 	HCMD_NAME(REPLY_SPECTRUM_MEASUREMENT_CMD),
84 	HCMD_NAME(SPECTRUM_MEASURE_NOTIFICATION),
85 	HCMD_NAME(POWER_TABLE_CMD),
86 	HCMD_NAME(PM_SLEEP_NOTIFICATION),
87 	HCMD_NAME(PM_DEBUG_STATISTIC_NOTIFIC),
88 	HCMD_NAME(REPLY_SCAN_CMD),
89 	HCMD_NAME(REPLY_SCAN_ABORT_CMD),
90 	HCMD_NAME(SCAN_START_NOTIFICATION),
91 	HCMD_NAME(SCAN_RESULTS_NOTIFICATION),
92 	HCMD_NAME(SCAN_COMPLETE_NOTIFICATION),
93 	HCMD_NAME(BEACON_NOTIFICATION),
94 	HCMD_NAME(REPLY_TX_BEACON),
95 	HCMD_NAME(WHO_IS_AWAKE_NOTIFICATION),
96 	HCMD_NAME(REPLY_TX_POWER_DBM_CMD),
97 	HCMD_NAME(QUIET_NOTIFICATION),
98 	HCMD_NAME(REPLY_TX_PWR_TABLE_CMD),
99 	HCMD_NAME(REPLY_TX_POWER_DBM_CMD_V1),
100 	HCMD_NAME(TX_ANT_CONFIGURATION_CMD),
101 	HCMD_NAME(MEASURE_ABORT_NOTIFICATION),
102 	HCMD_NAME(REPLY_BT_CONFIG),
103 	HCMD_NAME(REPLY_STATISTICS_CMD),
104 	HCMD_NAME(STATISTICS_NOTIFICATION),
105 	HCMD_NAME(REPLY_CARD_STATE_CMD),
106 	HCMD_NAME(CARD_STATE_NOTIFICATION),
107 	HCMD_NAME(MISSED_BEACONS_NOTIFICATION),
108 	HCMD_NAME(REPLY_CT_KILL_CONFIG_CMD),
109 	HCMD_NAME(SENSITIVITY_CMD),
110 	HCMD_NAME(REPLY_PHY_CALIBRATION_CMD),
111 	HCMD_NAME(REPLY_WIPAN_PARAMS),
112 	HCMD_NAME(REPLY_WIPAN_RXON),
113 	HCMD_NAME(REPLY_WIPAN_RXON_TIMING),
114 	HCMD_NAME(REPLY_WIPAN_RXON_ASSOC),
115 	HCMD_NAME(REPLY_WIPAN_QOS_PARAM),
116 	HCMD_NAME(REPLY_WIPAN_WEPKEY),
117 	HCMD_NAME(REPLY_WIPAN_P2P_CHANNEL_SWITCH),
118 	HCMD_NAME(REPLY_WIPAN_NOA_NOTIFICATION),
119 	HCMD_NAME(REPLY_WIPAN_DEACTIVATION_COMPLETE),
120 	HCMD_NAME(REPLY_RX_PHY_CMD),
121 	HCMD_NAME(REPLY_RX_MPDU_CMD),
122 	HCMD_NAME(REPLY_RX),
123 	HCMD_NAME(REPLY_COMPRESSED_BA),
124 	HCMD_NAME(REPLY_BT_COEX_PRIO_TABLE),
125 	HCMD_NAME(REPLY_BT_COEX_PROT_ENV),
126 	HCMD_NAME(REPLY_BT_COEX_PROFILE_NOTIF),
127 	HCMD_NAME(REPLY_D3_CONFIG),
128 	HCMD_NAME(REPLY_WOWLAN_PATTERNS),
129 	HCMD_NAME(REPLY_WOWLAN_WAKEUP_FILTER),
130 	HCMD_NAME(REPLY_WOWLAN_TSC_RSC_PARAMS),
131 	HCMD_NAME(REPLY_WOWLAN_TKIP_PARAMS),
132 	HCMD_NAME(REPLY_WOWLAN_KEK_KCK_MATERIAL),
133 	HCMD_NAME(REPLY_WOWLAN_GET_STATUS),
134 };
135 
136 static const struct iwl_hcmd_arr iwl_dvm_groups[] = {
137 	[0x0] = HCMD_ARR(iwl_dvm_cmd_names),
138 };
139 
140 static const struct iwl_op_mode_ops iwl_dvm_ops;
141 
iwl_update_chain_flags(struct iwl_priv * priv)142 void iwl_update_chain_flags(struct iwl_priv *priv)
143 {
144 	struct iwl_rxon_context *ctx;
145 
146 	for_each_context(priv, ctx) {
147 		iwlagn_set_rxon_chain(priv, ctx);
148 		if (ctx->active.rx_chain != ctx->staging.rx_chain)
149 			iwlagn_commit_rxon(priv, ctx);
150 	}
151 }
152 
153 /* Parse the beacon frame to find the TIM element and set tim_idx & tim_size */
iwl_set_beacon_tim(struct iwl_priv * priv,struct iwl_tx_beacon_cmd * tx_beacon_cmd,u8 * beacon,u32 frame_size)154 static void iwl_set_beacon_tim(struct iwl_priv *priv,
155 			       struct iwl_tx_beacon_cmd *tx_beacon_cmd,
156 			       u8 *beacon, u32 frame_size)
157 {
158 	u16 tim_idx;
159 	struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)beacon;
160 
161 	/*
162 	 * The index is relative to frame start but we start looking at the
163 	 * variable-length part of the beacon.
164 	 */
165 	tim_idx = mgmt->u.beacon.variable - beacon;
166 
167 	/* Parse variable-length elements of beacon to find WLAN_EID_TIM */
168 	while ((tim_idx < (frame_size - 2)) &&
169 			(beacon[tim_idx] != WLAN_EID_TIM))
170 		tim_idx += beacon[tim_idx+1] + 2;
171 
172 	/* If TIM field was found, set variables */
173 	if ((tim_idx < (frame_size - 1)) && (beacon[tim_idx] == WLAN_EID_TIM)) {
174 		tx_beacon_cmd->tim_idx = cpu_to_le16(tim_idx);
175 		tx_beacon_cmd->tim_size = beacon[tim_idx+1];
176 	} else
177 		IWL_WARN(priv, "Unable to find TIM Element in beacon\n");
178 }
179 
iwlagn_send_beacon_cmd(struct iwl_priv * priv)180 int iwlagn_send_beacon_cmd(struct iwl_priv *priv)
181 {
182 	struct iwl_tx_beacon_cmd *tx_beacon_cmd;
183 	struct iwl_host_cmd cmd = {
184 		.id = REPLY_TX_BEACON,
185 	};
186 	struct ieee80211_tx_info *info;
187 	u32 frame_size;
188 	u32 rate_flags;
189 	u32 rate;
190 
191 	/*
192 	 * We have to set up the TX command, the TX Beacon command, and the
193 	 * beacon contents.
194 	 */
195 
196 	lockdep_assert_held(&priv->mutex);
197 
198 	if (!priv->beacon_ctx) {
199 		IWL_ERR(priv, "trying to build beacon w/o beacon context!\n");
200 		return 0;
201 	}
202 
203 	if (WARN_ON(!priv->beacon_skb))
204 		return -EINVAL;
205 
206 	/* Allocate beacon command */
207 	if (!priv->beacon_cmd)
208 		priv->beacon_cmd = kzalloc(sizeof(*tx_beacon_cmd), GFP_KERNEL);
209 	tx_beacon_cmd = priv->beacon_cmd;
210 	if (!tx_beacon_cmd)
211 		return -ENOMEM;
212 
213 	frame_size = priv->beacon_skb->len;
214 
215 	/* Set up TX command fields */
216 	tx_beacon_cmd->tx.len = cpu_to_le16((u16)frame_size);
217 	tx_beacon_cmd->tx.sta_id = priv->beacon_ctx->bcast_sta_id;
218 	tx_beacon_cmd->tx.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
219 	tx_beacon_cmd->tx.tx_flags = TX_CMD_FLG_SEQ_CTL_MSK |
220 		TX_CMD_FLG_TSF_MSK | TX_CMD_FLG_STA_RATE_MSK;
221 
222 	/* Set up TX beacon command fields */
223 	iwl_set_beacon_tim(priv, tx_beacon_cmd, priv->beacon_skb->data,
224 			   frame_size);
225 
226 	/* Set up packet rate and flags */
227 	info = IEEE80211_SKB_CB(priv->beacon_skb);
228 
229 	/*
230 	 * Let's set up the rate at least somewhat correctly;
231 	 * it will currently not actually be used by the uCode,
232 	 * it uses the broadcast station's rate instead.
233 	 */
234 	if (info->control.rates[0].idx < 0 ||
235 	    info->control.rates[0].flags & IEEE80211_TX_RC_MCS)
236 		rate = 0;
237 	else
238 		rate = info->control.rates[0].idx;
239 
240 	priv->mgmt_tx_ant = iwl_toggle_tx_ant(priv, priv->mgmt_tx_ant,
241 					      priv->nvm_data->valid_tx_ant);
242 	rate_flags = iwl_ant_idx_to_flags(priv->mgmt_tx_ant);
243 
244 	/* In mac80211, rates for 5 GHz start at 0 */
245 	if (info->band == NL80211_BAND_5GHZ)
246 		rate += IWL_FIRST_OFDM_RATE;
247 	else if (rate >= IWL_FIRST_CCK_RATE && rate <= IWL_LAST_CCK_RATE)
248 		rate_flags |= RATE_MCS_CCK_MSK;
249 
250 	tx_beacon_cmd->tx.rate_n_flags =
251 			iwl_hw_set_rate_n_flags(rate, rate_flags);
252 
253 	/* Submit command */
254 	cmd.len[0] = sizeof(*tx_beacon_cmd);
255 	cmd.data[0] = tx_beacon_cmd;
256 	cmd.dataflags[0] = IWL_HCMD_DFL_NOCOPY;
257 	cmd.len[1] = frame_size;
258 	cmd.data[1] = priv->beacon_skb->data;
259 	cmd.dataflags[1] = IWL_HCMD_DFL_NOCOPY;
260 
261 	return iwl_dvm_send_cmd(priv, &cmd);
262 }
263 
iwl_bg_beacon_update(struct work_struct * work)264 static void iwl_bg_beacon_update(struct work_struct *work)
265 {
266 	struct iwl_priv *priv =
267 		container_of(work, struct iwl_priv, beacon_update);
268 	struct sk_buff *beacon;
269 
270 	mutex_lock(&priv->mutex);
271 	if (!priv->beacon_ctx) {
272 		IWL_ERR(priv, "updating beacon w/o beacon context!\n");
273 		goto out;
274 	}
275 
276 	if (priv->beacon_ctx->vif->type != NL80211_IFTYPE_AP) {
277 		/*
278 		 * The ucode will send beacon notifications even in
279 		 * IBSS mode, but we don't want to process them. But
280 		 * we need to defer the type check to here due to
281 		 * requiring locking around the beacon_ctx access.
282 		 */
283 		goto out;
284 	}
285 
286 	/* Pull updated AP beacon from mac80211. will fail if not in AP mode */
287 	beacon = ieee80211_beacon_get(priv->hw, priv->beacon_ctx->vif, 0);
288 	if (!beacon) {
289 		IWL_ERR(priv, "update beacon failed -- keeping old\n");
290 		goto out;
291 	}
292 
293 	/* new beacon skb is allocated every time; dispose previous.*/
294 	dev_kfree_skb(priv->beacon_skb);
295 
296 	priv->beacon_skb = beacon;
297 
298 	iwlagn_send_beacon_cmd(priv);
299  out:
300 	mutex_unlock(&priv->mutex);
301 }
302 
iwl_bg_bt_runtime_config(struct work_struct * work)303 static void iwl_bg_bt_runtime_config(struct work_struct *work)
304 {
305 	struct iwl_priv *priv =
306 		container_of(work, struct iwl_priv, bt_runtime_config);
307 
308 	mutex_lock(&priv->mutex);
309 	if (test_bit(STATUS_EXIT_PENDING, &priv->status))
310 		goto out;
311 
312 	/* dont send host command if rf-kill is on */
313 	if (!iwl_is_ready_rf(priv))
314 		goto out;
315 
316 	iwlagn_send_advance_bt_config(priv);
317 out:
318 	mutex_unlock(&priv->mutex);
319 }
320 
iwl_bg_bt_full_concurrency(struct work_struct * work)321 static void iwl_bg_bt_full_concurrency(struct work_struct *work)
322 {
323 	struct iwl_priv *priv =
324 		container_of(work, struct iwl_priv, bt_full_concurrency);
325 	struct iwl_rxon_context *ctx;
326 
327 	mutex_lock(&priv->mutex);
328 
329 	if (test_bit(STATUS_EXIT_PENDING, &priv->status))
330 		goto out;
331 
332 	/* dont send host command if rf-kill is on */
333 	if (!iwl_is_ready_rf(priv))
334 		goto out;
335 
336 	IWL_DEBUG_INFO(priv, "BT coex in %s mode\n",
337 		       priv->bt_full_concurrent ?
338 		       "full concurrency" : "3-wire");
339 
340 	/*
341 	 * LQ & RXON updated cmds must be sent before BT Config cmd
342 	 * to avoid 3-wire collisions
343 	 */
344 	for_each_context(priv, ctx) {
345 		iwlagn_set_rxon_chain(priv, ctx);
346 		iwlagn_commit_rxon(priv, ctx);
347 	}
348 
349 	iwlagn_send_advance_bt_config(priv);
350 out:
351 	mutex_unlock(&priv->mutex);
352 }
353 
iwl_send_statistics_request(struct iwl_priv * priv,u8 flags,bool clear)354 int iwl_send_statistics_request(struct iwl_priv *priv, u8 flags, bool clear)
355 {
356 	struct iwl_statistics_cmd statistics_cmd = {
357 		.configuration_flags =
358 			clear ? IWL_STATS_CONF_CLEAR_STATS : 0,
359 	};
360 
361 	if (flags & CMD_ASYNC)
362 		return iwl_dvm_send_cmd_pdu(priv, REPLY_STATISTICS_CMD,
363 					CMD_ASYNC,
364 					sizeof(struct iwl_statistics_cmd),
365 					&statistics_cmd);
366 	else
367 		return iwl_dvm_send_cmd_pdu(priv, REPLY_STATISTICS_CMD, 0,
368 					sizeof(struct iwl_statistics_cmd),
369 					&statistics_cmd);
370 }
371 
372 /*
373  * iwl_bg_statistics_periodic - Timer callback to queue statistics
374  *
375  * This callback is provided in order to send a statistics request.
376  *
377  * This timer function is continually reset to execute within
378  * REG_RECALIB_PERIOD seconds since the last STATISTICS_NOTIFICATION
379  * was received.  We need to ensure we receive the statistics in order
380  * to update the temperature used for calibrating the TXPOWER.
381  */
iwl_bg_statistics_periodic(struct timer_list * t)382 static void iwl_bg_statistics_periodic(struct timer_list *t)
383 {
384 	struct iwl_priv *priv = timer_container_of(priv, t,
385 						   statistics_periodic);
386 
387 	if (test_bit(STATUS_EXIT_PENDING, &priv->status))
388 		return;
389 
390 	/* dont send host command if rf-kill is on */
391 	if (!iwl_is_ready_rf(priv))
392 		return;
393 
394 	iwl_send_statistics_request(priv, CMD_ASYNC, false);
395 }
396 
397 
iwl_print_cont_event_trace(struct iwl_priv * priv,u32 base,u32 start_idx,u32 num_events,u32 capacity,u32 mode)398 static void iwl_print_cont_event_trace(struct iwl_priv *priv, u32 base,
399 					u32 start_idx, u32 num_events,
400 					u32 capacity, u32 mode)
401 {
402 	u32 i;
403 	u32 ptr;        /* SRAM byte address of log data */
404 	u32 ev, time, data; /* event log data */
405 
406 	if (mode == 0)
407 		ptr = base + (4 * sizeof(u32)) + (start_idx * 2 * sizeof(u32));
408 	else
409 		ptr = base + (4 * sizeof(u32)) + (start_idx * 3 * sizeof(u32));
410 
411 	/* Make sure device is powered up for SRAM reads */
412 	if (!iwl_trans_grab_nic_access(priv->trans))
413 		return;
414 
415 	/* Set starting address; reads will auto-increment */
416 	iwl_write32(priv->trans, HBUS_TARG_MEM_RADDR, ptr);
417 
418 	/*
419 	 * Refuse to read more than would have fit into the log from
420 	 * the current start_idx. This used to happen due to the race
421 	 * described below, but now WARN because the code below should
422 	 * prevent it from happening here.
423 	 */
424 	if (WARN_ON(num_events > capacity - start_idx))
425 		num_events = capacity - start_idx;
426 
427 	/*
428 	 * "time" is actually "data" for mode 0 (no timestamp).
429 	 * place event id # at far right for easier visual parsing.
430 	 */
431 	for (i = 0; i < num_events; i++) {
432 		ev = iwl_read32(priv->trans, HBUS_TARG_MEM_RDAT);
433 		time = iwl_read32(priv->trans, HBUS_TARG_MEM_RDAT);
434 		if (mode == 0) {
435 			trace_iwlwifi_dev_ucode_cont_event(
436 					priv->trans->dev, 0, time, ev);
437 		} else {
438 			data = iwl_read32(priv->trans, HBUS_TARG_MEM_RDAT);
439 			trace_iwlwifi_dev_ucode_cont_event(
440 					priv->trans->dev, time, data, ev);
441 		}
442 	}
443 	/* Allow device to power down */
444 	iwl_trans_release_nic_access(priv->trans);
445 }
446 
iwl_continuous_event_trace(struct iwl_priv * priv)447 static void iwl_continuous_event_trace(struct iwl_priv *priv)
448 {
449 	u32 capacity;   /* event log capacity in # entries */
450 	struct {
451 		u32 capacity;
452 		u32 mode;
453 		u32 wrap_counter;
454 		u32 write_counter;
455 	} __packed read;
456 	u32 base;       /* SRAM byte address of event log header */
457 	u32 mode;       /* 0 - no timestamp, 1 - timestamp recorded */
458 	u32 num_wraps;  /* # times uCode wrapped to top of log */
459 	u32 next_entry; /* index of next entry to be written by uCode */
460 
461 	base = priv->device_pointers.log_event_table;
462 	if (iwlagn_hw_valid_rtc_data_addr(base)) {
463 		iwl_trans_read_mem_bytes(priv->trans, base,
464 					 &read, sizeof(read));
465 		capacity = read.capacity;
466 		mode = read.mode;
467 		num_wraps = read.wrap_counter;
468 		next_entry = read.write_counter;
469 	} else
470 		return;
471 
472 	/*
473 	 * Unfortunately, the uCode doesn't use temporary variables.
474 	 * Therefore, it can happen that we read next_entry == capacity,
475 	 * which really means next_entry == 0.
476 	 */
477 	if (unlikely(next_entry == capacity))
478 		next_entry = 0;
479 	/*
480 	 * Additionally, the uCode increases the write pointer before
481 	 * the wraps counter, so if the write pointer is smaller than
482 	 * the old write pointer (wrap occurred) but we read that no
483 	 * wrap occurred, we actually read between the next_entry and
484 	 * num_wraps update (this does happen in practice!!) -- take
485 	 * that into account by increasing num_wraps.
486 	 */
487 	if (unlikely(next_entry < priv->event_log.next_entry &&
488 		     num_wraps == priv->event_log.num_wraps))
489 		num_wraps++;
490 
491 	if (num_wraps == priv->event_log.num_wraps) {
492 		iwl_print_cont_event_trace(
493 			priv, base, priv->event_log.next_entry,
494 			next_entry - priv->event_log.next_entry,
495 			capacity, mode);
496 
497 		priv->event_log.non_wraps_count++;
498 	} else {
499 		if (num_wraps - priv->event_log.num_wraps > 1)
500 			priv->event_log.wraps_more_count++;
501 		else
502 			priv->event_log.wraps_once_count++;
503 
504 		trace_iwlwifi_dev_ucode_wrap_event(priv->trans->dev,
505 				num_wraps - priv->event_log.num_wraps,
506 				next_entry, priv->event_log.next_entry);
507 
508 		if (next_entry < priv->event_log.next_entry) {
509 			iwl_print_cont_event_trace(
510 				priv, base, priv->event_log.next_entry,
511 				capacity - priv->event_log.next_entry,
512 				capacity, mode);
513 
514 			iwl_print_cont_event_trace(
515 				priv, base, 0, next_entry, capacity, mode);
516 		} else {
517 			iwl_print_cont_event_trace(
518 				priv, base, next_entry,
519 				capacity - next_entry,
520 				capacity, mode);
521 
522 			iwl_print_cont_event_trace(
523 				priv, base, 0, next_entry, capacity, mode);
524 		}
525 	}
526 
527 	priv->event_log.num_wraps = num_wraps;
528 	priv->event_log.next_entry = next_entry;
529 }
530 
531 /*
532  * iwl_bg_ucode_trace - Timer callback to log ucode event
533  *
534  * The timer is continually set to execute every
535  * UCODE_TRACE_PERIOD milliseconds after the last timer expired
536  * this function is to perform continuous uCode event logging operation
537  * if enabled
538  */
iwl_bg_ucode_trace(struct timer_list * t)539 static void iwl_bg_ucode_trace(struct timer_list *t)
540 {
541 	struct iwl_priv *priv = timer_container_of(priv, t, ucode_trace);
542 
543 	if (test_bit(STATUS_EXIT_PENDING, &priv->status))
544 		return;
545 
546 	if (priv->event_log.ucode_trace) {
547 		iwl_continuous_event_trace(priv);
548 		/* Reschedule the timer to occur in UCODE_TRACE_PERIOD */
549 		mod_timer(&priv->ucode_trace,
550 			 jiffies + msecs_to_jiffies(UCODE_TRACE_PERIOD));
551 	}
552 }
553 
iwl_bg_tx_flush(struct work_struct * work)554 static void iwl_bg_tx_flush(struct work_struct *work)
555 {
556 	struct iwl_priv *priv =
557 		container_of(work, struct iwl_priv, tx_flush);
558 
559 	if (test_bit(STATUS_EXIT_PENDING, &priv->status))
560 		return;
561 
562 	/* do nothing if rf-kill is on */
563 	if (!iwl_is_ready_rf(priv))
564 		return;
565 
566 	IWL_DEBUG_INFO(priv, "device request: flush all tx frames\n");
567 	iwlagn_dev_txfifo_flush(priv);
568 }
569 
570 /*
571  * queue/FIFO/AC mapping definitions
572  */
573 
574 static const u8 iwlagn_bss_ac_to_fifo[] = {
575 	IWL_TX_FIFO_VO,
576 	IWL_TX_FIFO_VI,
577 	IWL_TX_FIFO_BE,
578 	IWL_TX_FIFO_BK,
579 };
580 
581 static const u8 iwlagn_bss_ac_to_queue[] = {
582 	0, 1, 2, 3,
583 };
584 
585 static const u8 iwlagn_pan_ac_to_fifo[] = {
586 	IWL_TX_FIFO_VO_IPAN,
587 	IWL_TX_FIFO_VI_IPAN,
588 	IWL_TX_FIFO_BE_IPAN,
589 	IWL_TX_FIFO_BK_IPAN,
590 };
591 
592 static const u8 iwlagn_pan_ac_to_queue[] = {
593 	7, 6, 5, 4,
594 };
595 
iwl_init_context(struct iwl_priv * priv,u32 ucode_flags)596 static void iwl_init_context(struct iwl_priv *priv, u32 ucode_flags)
597 {
598 	int i;
599 
600 	/*
601 	 * The default context is always valid,
602 	 * the PAN context depends on uCode.
603 	 */
604 	priv->valid_contexts = BIT(IWL_RXON_CTX_BSS);
605 	if (ucode_flags & IWL_UCODE_TLV_FLAGS_PAN)
606 		priv->valid_contexts |= BIT(IWL_RXON_CTX_PAN);
607 
608 	for (i = 0; i < NUM_IWL_RXON_CTX; i++)
609 		priv->contexts[i].ctxid = i;
610 
611 	priv->contexts[IWL_RXON_CTX_BSS].always_active = true;
612 	priv->contexts[IWL_RXON_CTX_BSS].is_active = true;
613 	priv->contexts[IWL_RXON_CTX_BSS].rxon_cmd = REPLY_RXON;
614 	priv->contexts[IWL_RXON_CTX_BSS].rxon_timing_cmd = REPLY_RXON_TIMING;
615 	priv->contexts[IWL_RXON_CTX_BSS].rxon_assoc_cmd = REPLY_RXON_ASSOC;
616 	priv->contexts[IWL_RXON_CTX_BSS].qos_cmd = REPLY_QOS_PARAM;
617 	priv->contexts[IWL_RXON_CTX_BSS].ap_sta_id = IWL_AP_ID;
618 	priv->contexts[IWL_RXON_CTX_BSS].wep_key_cmd = REPLY_WEPKEY;
619 	priv->contexts[IWL_RXON_CTX_BSS].bcast_sta_id = IWLAGN_BROADCAST_ID;
620 	priv->contexts[IWL_RXON_CTX_BSS].exclusive_interface_modes =
621 		BIT(NL80211_IFTYPE_ADHOC) | BIT(NL80211_IFTYPE_MONITOR);
622 	priv->contexts[IWL_RXON_CTX_BSS].interface_modes =
623 		BIT(NL80211_IFTYPE_STATION);
624 	priv->contexts[IWL_RXON_CTX_BSS].ap_devtype = RXON_DEV_TYPE_AP;
625 	priv->contexts[IWL_RXON_CTX_BSS].ibss_devtype = RXON_DEV_TYPE_IBSS;
626 	priv->contexts[IWL_RXON_CTX_BSS].station_devtype = RXON_DEV_TYPE_ESS;
627 	priv->contexts[IWL_RXON_CTX_BSS].unused_devtype = RXON_DEV_TYPE_ESS;
628 	memcpy(priv->contexts[IWL_RXON_CTX_BSS].ac_to_queue,
629 	       iwlagn_bss_ac_to_queue, sizeof(iwlagn_bss_ac_to_queue));
630 	memcpy(priv->contexts[IWL_RXON_CTX_BSS].ac_to_fifo,
631 	       iwlagn_bss_ac_to_fifo, sizeof(iwlagn_bss_ac_to_fifo));
632 
633 	priv->contexts[IWL_RXON_CTX_PAN].rxon_cmd = REPLY_WIPAN_RXON;
634 	priv->contexts[IWL_RXON_CTX_PAN].rxon_timing_cmd =
635 		REPLY_WIPAN_RXON_TIMING;
636 	priv->contexts[IWL_RXON_CTX_PAN].rxon_assoc_cmd =
637 		REPLY_WIPAN_RXON_ASSOC;
638 	priv->contexts[IWL_RXON_CTX_PAN].qos_cmd = REPLY_WIPAN_QOS_PARAM;
639 	priv->contexts[IWL_RXON_CTX_PAN].ap_sta_id = IWL_AP_ID_PAN;
640 	priv->contexts[IWL_RXON_CTX_PAN].wep_key_cmd = REPLY_WIPAN_WEPKEY;
641 	priv->contexts[IWL_RXON_CTX_PAN].bcast_sta_id = IWLAGN_PAN_BCAST_ID;
642 	priv->contexts[IWL_RXON_CTX_PAN].station_flags = STA_FLG_PAN_STATION;
643 	priv->contexts[IWL_RXON_CTX_PAN].interface_modes =
644 		BIT(NL80211_IFTYPE_STATION) | BIT(NL80211_IFTYPE_AP);
645 
646 	priv->contexts[IWL_RXON_CTX_PAN].ap_devtype = RXON_DEV_TYPE_CP;
647 	priv->contexts[IWL_RXON_CTX_PAN].station_devtype = RXON_DEV_TYPE_2STA;
648 	priv->contexts[IWL_RXON_CTX_PAN].unused_devtype = RXON_DEV_TYPE_P2P;
649 	memcpy(priv->contexts[IWL_RXON_CTX_PAN].ac_to_queue,
650 	       iwlagn_pan_ac_to_queue, sizeof(iwlagn_pan_ac_to_queue));
651 	memcpy(priv->contexts[IWL_RXON_CTX_PAN].ac_to_fifo,
652 	       iwlagn_pan_ac_to_fifo, sizeof(iwlagn_pan_ac_to_fifo));
653 	priv->contexts[IWL_RXON_CTX_PAN].mcast_queue = IWL_IPAN_MCAST_QUEUE;
654 
655 	BUILD_BUG_ON(NUM_IWL_RXON_CTX != 2);
656 }
657 
iwl_rf_kill_ct_config(struct iwl_priv * priv)658 static void iwl_rf_kill_ct_config(struct iwl_priv *priv)
659 {
660 	struct iwl_ct_kill_config cmd;
661 	struct iwl_ct_kill_throttling_config adv_cmd;
662 	int ret = 0;
663 
664 	iwl_write32(priv->trans, CSR_UCODE_DRV_GP1_CLR,
665 		    CSR_UCODE_DRV_GP1_REG_BIT_CT_KILL_EXIT);
666 
667 	priv->thermal_throttle.ct_kill_toggle = false;
668 
669 	if (priv->lib->support_ct_kill_exit) {
670 		adv_cmd.critical_temperature_enter =
671 			cpu_to_le32(priv->hw_params.ct_kill_threshold);
672 		adv_cmd.critical_temperature_exit =
673 			cpu_to_le32(priv->hw_params.ct_kill_exit_threshold);
674 
675 		ret = iwl_dvm_send_cmd_pdu(priv,
676 				       REPLY_CT_KILL_CONFIG_CMD,
677 				       0, sizeof(adv_cmd), &adv_cmd);
678 		if (ret)
679 			IWL_ERR(priv, "REPLY_CT_KILL_CONFIG_CMD failed\n");
680 		else
681 			IWL_DEBUG_INFO(priv, "REPLY_CT_KILL_CONFIG_CMD "
682 				"succeeded, critical temperature enter is %d,"
683 				"exit is %d\n",
684 				priv->hw_params.ct_kill_threshold,
685 				priv->hw_params.ct_kill_exit_threshold);
686 	} else {
687 		cmd.critical_temperature_R =
688 			cpu_to_le32(priv->hw_params.ct_kill_threshold);
689 
690 		ret = iwl_dvm_send_cmd_pdu(priv,
691 				       REPLY_CT_KILL_CONFIG_CMD,
692 				       0, sizeof(cmd), &cmd);
693 		if (ret)
694 			IWL_ERR(priv, "REPLY_CT_KILL_CONFIG_CMD failed\n");
695 		else
696 			IWL_DEBUG_INFO(priv, "REPLY_CT_KILL_CONFIG_CMD "
697 				"succeeded, "
698 				"critical temperature is %d\n",
699 				priv->hw_params.ct_kill_threshold);
700 	}
701 }
702 
iwlagn_send_calib_cfg_rt(struct iwl_priv * priv,u32 cfg)703 static int iwlagn_send_calib_cfg_rt(struct iwl_priv *priv, u32 cfg)
704 {
705 	struct iwl_calib_cfg_cmd calib_cfg_cmd;
706 	struct iwl_host_cmd cmd = {
707 		.id = CALIBRATION_CFG_CMD,
708 		.len = { sizeof(struct iwl_calib_cfg_cmd), },
709 		.data = { &calib_cfg_cmd, },
710 	};
711 
712 	memset(&calib_cfg_cmd, 0, sizeof(calib_cfg_cmd));
713 	calib_cfg_cmd.ucd_calib_cfg.once.is_enable = IWL_CALIB_RT_CFG_ALL;
714 	calib_cfg_cmd.ucd_calib_cfg.once.start = cpu_to_le32(cfg);
715 
716 	return iwl_dvm_send_cmd(priv, &cmd);
717 }
718 
719 
iwlagn_send_tx_ant_config(struct iwl_priv * priv,u8 valid_tx_ant)720 static int iwlagn_send_tx_ant_config(struct iwl_priv *priv, u8 valid_tx_ant)
721 {
722 	struct iwl_tx_ant_config_cmd tx_ant_cmd = {
723 	  .valid = cpu_to_le32(valid_tx_ant),
724 	};
725 
726 	if (IWL_UCODE_API(priv->fw->ucode_ver) > 1) {
727 		IWL_DEBUG_HC(priv, "select valid tx ant: %u\n", valid_tx_ant);
728 		return iwl_dvm_send_cmd_pdu(priv, TX_ANT_CONFIGURATION_CMD, 0,
729 					sizeof(struct iwl_tx_ant_config_cmd),
730 					&tx_ant_cmd);
731 	} else {
732 		IWL_DEBUG_HC(priv, "TX_ANT_CONFIGURATION_CMD not supported\n");
733 		return -EOPNOTSUPP;
734 	}
735 }
736 
iwl_send_bt_config(struct iwl_priv * priv)737 static void iwl_send_bt_config(struct iwl_priv *priv)
738 {
739 	struct iwl_bt_cmd bt_cmd = {
740 		.lead_time = BT_LEAD_TIME_DEF,
741 		.max_kill = BT_MAX_KILL_DEF,
742 		.kill_ack_mask = 0,
743 		.kill_cts_mask = 0,
744 	};
745 
746 	if (!iwlwifi_mod_params.bt_coex_active)
747 		bt_cmd.flags = BT_COEX_DISABLE;
748 	else
749 		bt_cmd.flags = BT_COEX_ENABLE;
750 
751 	priv->bt_enable_flag = bt_cmd.flags;
752 	IWL_DEBUG_INFO(priv, "BT coex %s\n",
753 		(bt_cmd.flags == BT_COEX_DISABLE) ? "disable" : "active");
754 
755 	if (iwl_dvm_send_cmd_pdu(priv, REPLY_BT_CONFIG,
756 			     0, sizeof(struct iwl_bt_cmd), &bt_cmd))
757 		IWL_ERR(priv, "failed to send BT Coex Config\n");
758 }
759 
760 /*
761  * iwl_alive_start - called after REPLY_ALIVE notification received
762  *                   from protocol/runtime uCode (initialization uCode's
763  *                   Alive gets handled by iwl_init_alive_start()).
764  */
iwl_alive_start(struct iwl_priv * priv)765 int iwl_alive_start(struct iwl_priv *priv)
766 {
767 	int ret = 0;
768 	struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
769 
770 	IWL_DEBUG_INFO(priv, "Runtime Alive received.\n");
771 
772 	/* After the ALIVE response, we can send host commands to the uCode */
773 	set_bit(STATUS_ALIVE, &priv->status);
774 
775 	if (iwl_is_rfkill(priv))
776 		return -ERFKILL;
777 
778 	if (priv->event_log.ucode_trace) {
779 		/* start collecting data now */
780 		mod_timer(&priv->ucode_trace, jiffies);
781 	}
782 
783 	/* download priority table before any calibration request */
784 	if (priv->lib->bt_params &&
785 	    priv->lib->bt_params->advanced_bt_coexist) {
786 		/* Configure Bluetooth device coexistence support */
787 		if (priv->lib->bt_params->bt_sco_disable)
788 			priv->bt_enable_pspoll = false;
789 		else
790 			priv->bt_enable_pspoll = true;
791 
792 		priv->bt_valid = IWLAGN_BT_ALL_VALID_MSK;
793 		priv->kill_ack_mask = IWLAGN_BT_KILL_ACK_MASK_DEFAULT;
794 		priv->kill_cts_mask = IWLAGN_BT_KILL_CTS_MASK_DEFAULT;
795 		iwlagn_send_advance_bt_config(priv);
796 		priv->bt_valid = IWLAGN_BT_VALID_ENABLE_FLAGS;
797 		priv->cur_rssi_ctx = NULL;
798 
799 		iwl_send_prio_tbl(priv);
800 
801 		/* FIXME: w/a to force change uCode BT state machine */
802 		ret = iwl_send_bt_env(priv, IWL_BT_COEX_ENV_OPEN,
803 					 BT_COEX_PRIO_TBL_EVT_INIT_CALIB2);
804 		if (ret)
805 			return ret;
806 		ret = iwl_send_bt_env(priv, IWL_BT_COEX_ENV_CLOSE,
807 					 BT_COEX_PRIO_TBL_EVT_INIT_CALIB2);
808 		if (ret)
809 			return ret;
810 	} else if (priv->lib->bt_params) {
811 		/*
812 		 * default is 2-wire BT coexexistence support
813 		 */
814 		iwl_send_bt_config(priv);
815 	}
816 
817 	/*
818 	 * Perform runtime calibrations, including DC calibration.
819 	 */
820 	iwlagn_send_calib_cfg_rt(priv, IWL_CALIB_CFG_DC_IDX);
821 
822 	ieee80211_wake_queues(priv->hw);
823 
824 	/* Configure Tx antenna selection based on H/W config */
825 	iwlagn_send_tx_ant_config(priv, priv->nvm_data->valid_tx_ant);
826 
827 	if (iwl_is_associated_ctx(ctx) && !priv->wowlan) {
828 		struct iwl_rxon_cmd *active = (void *)(uintptr_t)&ctx->active;
829 
830 		/* apply any changes in staging */
831 		ctx->staging.filter_flags |= RXON_FILTER_ASSOC_MSK;
832 		active->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
833 	} else {
834 		struct iwl_rxon_context *tmp;
835 		/* Initialize our rx_config data */
836 		for_each_context(priv, tmp)
837 			iwl_connection_init_rx_config(priv, tmp);
838 
839 		iwlagn_set_rxon_chain(priv, ctx);
840 	}
841 
842 	if (!priv->wowlan) {
843 		/* WoWLAN ucode will not reply in the same way, skip it */
844 		iwl_reset_run_time_calib(priv);
845 	}
846 
847 	set_bit(STATUS_READY, &priv->status);
848 
849 	/* Configure the adapter for unassociated operation */
850 	ret = iwlagn_commit_rxon(priv, ctx);
851 	if (ret)
852 		return ret;
853 
854 	/* At this point, the NIC is initialized and operational */
855 	iwl_rf_kill_ct_config(priv);
856 
857 	IWL_DEBUG_INFO(priv, "ALIVE processing complete.\n");
858 
859 	return iwl_power_update_mode(priv, true);
860 }
861 
862 /**
863  * iwl_clear_driver_stations - clear knowledge of all stations from driver
864  * @priv: iwl priv struct
865  *
866  * This is called during iwl_down() to make sure that in the case
867  * we're coming there from a hardware restart mac80211 will be
868  * able to reconfigure stations -- if we're getting there in the
869  * normal down flow then the stations will already be cleared.
870  */
iwl_clear_driver_stations(struct iwl_priv * priv)871 static void iwl_clear_driver_stations(struct iwl_priv *priv)
872 {
873 	struct iwl_rxon_context *ctx;
874 
875 	spin_lock_bh(&priv->sta_lock);
876 	memset(priv->stations, 0, sizeof(priv->stations));
877 	priv->num_stations = 0;
878 
879 	priv->ucode_key_table = 0;
880 
881 	for_each_context(priv, ctx) {
882 		/*
883 		 * Remove all key information that is not stored as part
884 		 * of station information since mac80211 may not have had
885 		 * a chance to remove all the keys. When device is
886 		 * reconfigured by mac80211 after an error all keys will
887 		 * be reconfigured.
888 		 */
889 		memset(ctx->wep_keys, 0, sizeof(ctx->wep_keys));
890 		ctx->key_mapping_keys = 0;
891 	}
892 
893 	spin_unlock_bh(&priv->sta_lock);
894 }
895 
iwl_down(struct iwl_priv * priv)896 void iwl_down(struct iwl_priv *priv)
897 {
898 	int exit_pending;
899 
900 	IWL_DEBUG_INFO(priv, DRV_NAME " is going down\n");
901 
902 	lockdep_assert_held(&priv->mutex);
903 
904 	iwl_scan_cancel_timeout(priv, 200);
905 
906 	exit_pending =
907 		test_and_set_bit(STATUS_EXIT_PENDING, &priv->status);
908 
909 	iwl_clear_ucode_stations(priv, NULL);
910 	iwl_dealloc_bcast_stations(priv);
911 	iwl_clear_driver_stations(priv);
912 
913 	/* reset BT coex data */
914 	priv->bt_status = 0;
915 	priv->cur_rssi_ctx = NULL;
916 	priv->bt_is_sco = 0;
917 	if (priv->lib->bt_params)
918 		priv->bt_traffic_load =
919 			 priv->lib->bt_params->bt_init_traffic_load;
920 	else
921 		priv->bt_traffic_load = 0;
922 	priv->bt_full_concurrent = false;
923 	priv->bt_ci_compliance = 0;
924 
925 	/* Wipe out the EXIT_PENDING status bit if we are not actually
926 	 * exiting the module */
927 	if (!exit_pending)
928 		clear_bit(STATUS_EXIT_PENDING, &priv->status);
929 
930 	if (priv->mac80211_registered)
931 		ieee80211_stop_queues(priv->hw);
932 
933 	priv->ucode_loaded = false;
934 	iwl_trans_stop_device(priv->trans);
935 
936 	/* Set num_aux_in_flight must be done after the transport is stopped */
937 	atomic_set(&priv->num_aux_in_flight, 0);
938 
939 	/* Clear out all status bits but a few that are stable across reset */
940 	priv->status &= test_bit(STATUS_RF_KILL_HW, &priv->status) <<
941 				STATUS_RF_KILL_HW |
942 			test_bit(STATUS_FW_ERROR, &priv->status) <<
943 				STATUS_FW_ERROR |
944 			test_bit(STATUS_EXIT_PENDING, &priv->status) <<
945 				STATUS_EXIT_PENDING;
946 
947 	dev_kfree_skb(priv->beacon_skb);
948 	priv->beacon_skb = NULL;
949 }
950 
951 /*****************************************************************************
952  *
953  * Workqueue callbacks
954  *
955  *****************************************************************************/
956 
iwl_bg_run_time_calib_work(struct work_struct * work)957 static void iwl_bg_run_time_calib_work(struct work_struct *work)
958 {
959 	struct iwl_priv *priv = container_of(work, struct iwl_priv,
960 			run_time_calib_work);
961 
962 	mutex_lock(&priv->mutex);
963 
964 	if (test_bit(STATUS_EXIT_PENDING, &priv->status) ||
965 	    test_bit(STATUS_SCANNING, &priv->status)) {
966 		mutex_unlock(&priv->mutex);
967 		return;
968 	}
969 
970 	if (priv->start_calib) {
971 		iwl_chain_noise_calibration(priv);
972 		iwl_sensitivity_calibration(priv);
973 	}
974 
975 	mutex_unlock(&priv->mutex);
976 }
977 
iwlagn_prepare_restart(struct iwl_priv * priv)978 void iwlagn_prepare_restart(struct iwl_priv *priv)
979 {
980 	bool bt_full_concurrent;
981 	u8 bt_ci_compliance;
982 	u8 bt_load;
983 	u8 bt_status;
984 	bool bt_is_sco;
985 	int i;
986 
987 	lockdep_assert_held(&priv->mutex);
988 
989 	priv->is_open = 0;
990 
991 	/*
992 	 * __iwl_down() will clear the BT status variables,
993 	 * which is correct, but when we restart we really
994 	 * want to keep them so restore them afterwards.
995 	 *
996 	 * The restart process will later pick them up and
997 	 * re-configure the hw when we reconfigure the BT
998 	 * command.
999 	 */
1000 	bt_full_concurrent = priv->bt_full_concurrent;
1001 	bt_ci_compliance = priv->bt_ci_compliance;
1002 	bt_load = priv->bt_traffic_load;
1003 	bt_status = priv->bt_status;
1004 	bt_is_sco = priv->bt_is_sco;
1005 
1006 	iwl_down(priv);
1007 
1008 	priv->bt_full_concurrent = bt_full_concurrent;
1009 	priv->bt_ci_compliance = bt_ci_compliance;
1010 	priv->bt_traffic_load = bt_load;
1011 	priv->bt_status = bt_status;
1012 	priv->bt_is_sco = bt_is_sco;
1013 
1014 	/* reset aggregation queues */
1015 	for (i = IWLAGN_FIRST_AMPDU_QUEUE; i < IWL_MAX_HW_QUEUES; i++)
1016 		priv->queue_to_mac80211[i] = IWL_INVALID_MAC80211_QUEUE;
1017 	/* and stop counts */
1018 	for (i = 0; i < IWL_MAX_HW_QUEUES; i++)
1019 		atomic_set(&priv->queue_stop_count[i], 0);
1020 
1021 	memset(priv->agg_q_alloc, 0, sizeof(priv->agg_q_alloc));
1022 }
1023 
iwl_bg_restart(struct work_struct * data)1024 static void iwl_bg_restart(struct work_struct *data)
1025 {
1026 	struct iwl_priv *priv = container_of(data, struct iwl_priv, restart);
1027 
1028 	if (test_bit(STATUS_EXIT_PENDING, &priv->status))
1029 		return;
1030 
1031 	if (test_and_clear_bit(STATUS_FW_ERROR, &priv->status)) {
1032 		mutex_lock(&priv->mutex);
1033 		iwlagn_prepare_restart(priv);
1034 		mutex_unlock(&priv->mutex);
1035 		iwl_cancel_deferred_work(priv);
1036 		if (priv->mac80211_registered)
1037 			ieee80211_restart_hw(priv->hw);
1038 		else
1039 			IWL_ERR(priv,
1040 				"Cannot request restart before registering with mac80211\n");
1041 	} else {
1042 		WARN_ON(1);
1043 	}
1044 }
1045 
1046 /*****************************************************************************
1047  *
1048  * driver setup and teardown
1049  *
1050  *****************************************************************************/
1051 
iwl_setup_deferred_work(struct iwl_priv * priv)1052 static int iwl_setup_deferred_work(struct iwl_priv *priv)
1053 {
1054 	priv->workqueue = alloc_ordered_workqueue(DRV_NAME, 0);
1055 	if (!priv->workqueue)
1056 		return -ENOMEM;
1057 
1058 	INIT_WORK(&priv->restart, iwl_bg_restart);
1059 	INIT_WORK(&priv->beacon_update, iwl_bg_beacon_update);
1060 	INIT_WORK(&priv->run_time_calib_work, iwl_bg_run_time_calib_work);
1061 	INIT_WORK(&priv->tx_flush, iwl_bg_tx_flush);
1062 	INIT_WORK(&priv->bt_full_concurrency, iwl_bg_bt_full_concurrency);
1063 	INIT_WORK(&priv->bt_runtime_config, iwl_bg_bt_runtime_config);
1064 
1065 	iwl_setup_scan_deferred_work(priv);
1066 
1067 	if (priv->lib->bt_params)
1068 		iwlagn_bt_setup_deferred_work(priv);
1069 
1070 	timer_setup(&priv->statistics_periodic, iwl_bg_statistics_periodic, 0);
1071 
1072 	timer_setup(&priv->ucode_trace, iwl_bg_ucode_trace, 0);
1073 
1074 	return 0;
1075 }
1076 
iwl_cancel_deferred_work(struct iwl_priv * priv)1077 void iwl_cancel_deferred_work(struct iwl_priv *priv)
1078 {
1079 	if (priv->lib->bt_params)
1080 		iwlagn_bt_cancel_deferred_work(priv);
1081 
1082 	cancel_work_sync(&priv->run_time_calib_work);
1083 	cancel_work_sync(&priv->beacon_update);
1084 
1085 	iwl_cancel_scan_deferred_work(priv);
1086 
1087 	cancel_work_sync(&priv->bt_full_concurrency);
1088 	cancel_work_sync(&priv->bt_runtime_config);
1089 
1090 	timer_delete_sync(&priv->statistics_periodic);
1091 	timer_delete_sync(&priv->ucode_trace);
1092 }
1093 
iwl_init_drv(struct iwl_priv * priv)1094 static int iwl_init_drv(struct iwl_priv *priv)
1095 {
1096 	spin_lock_init(&priv->sta_lock);
1097 
1098 	mutex_init(&priv->mutex);
1099 
1100 	INIT_LIST_HEAD(&priv->calib_results);
1101 
1102 	priv->band = NL80211_BAND_2GHZ;
1103 
1104 	priv->plcp_delta_threshold = priv->lib->plcp_delta_threshold;
1105 
1106 	priv->iw_mode = NL80211_IFTYPE_STATION;
1107 	priv->current_ht_config.smps = IEEE80211_SMPS_STATIC;
1108 	priv->missed_beacon_threshold = IWL_MISSED_BEACON_THRESHOLD_DEF;
1109 	priv->agg_tids_count = 0;
1110 
1111 	priv->rx_statistics_jiffies = jiffies;
1112 
1113 	/* Choose which receivers/antennas to use */
1114 	iwlagn_set_rxon_chain(priv, &priv->contexts[IWL_RXON_CTX_BSS]);
1115 
1116 	iwl_init_scan_params(priv);
1117 
1118 	/* init bt coex */
1119 	if (priv->lib->bt_params &&
1120 	    priv->lib->bt_params->advanced_bt_coexist) {
1121 		priv->kill_ack_mask = IWLAGN_BT_KILL_ACK_MASK_DEFAULT;
1122 		priv->kill_cts_mask = IWLAGN_BT_KILL_CTS_MASK_DEFAULT;
1123 		priv->bt_valid = IWLAGN_BT_ALL_VALID_MSK;
1124 		priv->bt_on_thresh = BT_ON_THRESHOLD_DEF;
1125 		priv->bt_duration = BT_DURATION_LIMIT_DEF;
1126 		priv->dynamic_frag_thresh = BT_FRAG_THRESHOLD_DEF;
1127 	}
1128 
1129 	return 0;
1130 }
1131 
iwl_uninit_drv(struct iwl_priv * priv)1132 static void iwl_uninit_drv(struct iwl_priv *priv)
1133 {
1134 	kfree(priv->scan_cmd);
1135 	kfree(priv->beacon_cmd);
1136 	kfree(rcu_dereference_raw(priv->noa_data));
1137 	iwl_calib_free_results(priv);
1138 #ifdef CONFIG_IWLWIFI_DEBUGFS
1139 	kfree(priv->wowlan_sram);
1140 #endif
1141 }
1142 
iwl_set_hw_params(struct iwl_priv * priv)1143 static void iwl_set_hw_params(struct iwl_priv *priv)
1144 {
1145 	/* there are no devices with HT but without HT40 on all bands */
1146 	if (priv->cfg->ht_params.ht40_bands)
1147 		priv->hw_params.use_rts_for_aggregation =
1148 			priv->cfg->ht_params.use_rts_for_aggregation;
1149 
1150 	/* Device-specific setup */
1151 	priv->lib->set_hw_params(priv);
1152 }
1153 
1154 
1155 
1156 /* show what optional capabilities we have */
iwl_option_config(struct iwl_priv * priv)1157 static void iwl_option_config(struct iwl_priv *priv)
1158 {
1159 #ifdef CONFIG_IWLWIFI_DEBUG
1160 	IWL_INFO(priv, "CONFIG_IWLWIFI_DEBUG enabled\n");
1161 #else
1162 	IWL_INFO(priv, "CONFIG_IWLWIFI_DEBUG disabled\n");
1163 #endif
1164 
1165 #ifdef CONFIG_IWLWIFI_DEBUGFS
1166 	IWL_INFO(priv, "CONFIG_IWLWIFI_DEBUGFS enabled\n");
1167 #else
1168 	IWL_INFO(priv, "CONFIG_IWLWIFI_DEBUGFS disabled\n");
1169 #endif
1170 
1171 #ifdef CONFIG_IWLWIFI_DEVICE_TRACING
1172 	IWL_INFO(priv, "CONFIG_IWLWIFI_DEVICE_TRACING enabled\n");
1173 #else
1174 	IWL_INFO(priv, "CONFIG_IWLWIFI_DEVICE_TRACING disabled\n");
1175 #endif
1176 }
1177 
iwl_eeprom_init_hw_params(struct iwl_priv * priv)1178 static int iwl_eeprom_init_hw_params(struct iwl_priv *priv)
1179 {
1180 	struct iwl_nvm_data *data = priv->nvm_data;
1181 
1182 	/* all HT devices also have HT40 on at least one band */
1183 	if (data->sku_cap_11n_enable &&
1184 	    !priv->cfg->ht_params.ht40_bands) {
1185 		IWL_ERR(priv, "Invalid 11n configuration\n");
1186 		return -EINVAL;
1187 	}
1188 
1189 	if (!data->sku_cap_11n_enable && !data->sku_cap_band_24ghz_enable &&
1190 	    !data->sku_cap_band_52ghz_enable) {
1191 		IWL_ERR(priv, "Invalid device sku\n");
1192 		return -EINVAL;
1193 	}
1194 
1195 	IWL_DEBUG_INFO(priv,
1196 		       "Device SKU: 24GHz %s %s, 52GHz %s %s, 11.n %s %s\n",
1197 		       data->sku_cap_band_24ghz_enable ? "" : "NOT", "enabled",
1198 		       data->sku_cap_band_52ghz_enable ? "" : "NOT", "enabled",
1199 		       data->sku_cap_11n_enable ? "" : "NOT", "enabled");
1200 
1201 	priv->hw_params.tx_chains_num =
1202 		num_of_ant(data->valid_tx_ant);
1203 	if (priv->cfg->rx_with_siso_diversity)
1204 		priv->hw_params.rx_chains_num = 1;
1205 	else
1206 		priv->hw_params.rx_chains_num =
1207 			num_of_ant(data->valid_rx_ant);
1208 
1209 	IWL_DEBUG_INFO(priv, "Valid Tx ant: 0x%X, Valid Rx ant: 0x%X\n",
1210 		       data->valid_tx_ant,
1211 		       data->valid_rx_ant);
1212 
1213 	return 0;
1214 }
1215 
iwl_nvm_check_version(struct iwl_nvm_data * data,struct iwl_trans * trans)1216 static int iwl_nvm_check_version(struct iwl_nvm_data *data,
1217 				 struct iwl_trans *trans)
1218 {
1219 	if (data->nvm_version >= trans->cfg->nvm_ver ||
1220 	    data->calib_version >= trans->cfg->nvm_calib_ver) {
1221 		IWL_DEBUG_INFO(trans, "device EEPROM VER=0x%x, CALIB=0x%x\n",
1222 			       data->nvm_version, data->calib_version);
1223 		return 0;
1224 	}
1225 
1226 	IWL_ERR(trans,
1227 		"Unsupported (too old) EEPROM VER=0x%x < 0x%x CALIB=0x%x < 0x%x\n",
1228 		data->nvm_version, trans->cfg->nvm_ver,
1229 		data->calib_version,  trans->cfg->nvm_calib_ver);
1230 	return -EINVAL;
1231 }
1232 
iwl_op_mode_dvm_start(struct iwl_trans * trans,const struct iwl_rf_cfg * cfg,const struct iwl_fw * fw,struct dentry * dbgfs_dir)1233 static struct iwl_op_mode *iwl_op_mode_dvm_start(struct iwl_trans *trans,
1234 						 const struct iwl_rf_cfg *cfg,
1235 						 const struct iwl_fw *fw,
1236 						 struct dentry *dbgfs_dir)
1237 {
1238 	struct iwl_priv *priv;
1239 	struct ieee80211_hw *hw;
1240 	struct iwl_op_mode *op_mode;
1241 	u16 num_mac;
1242 	u32 ucode_flags;
1243 	static const u8 no_reclaim_cmds[] = {
1244 		REPLY_RX_PHY_CMD,
1245 		REPLY_RX_MPDU_CMD,
1246 		REPLY_COMPRESSED_BA,
1247 		STATISTICS_NOTIFICATION,
1248 		REPLY_TX,
1249 	};
1250 	int i, err;
1251 
1252 	/************************
1253 	 * 1. Allocating HW data
1254 	 ************************/
1255 	hw = iwl_alloc_all();
1256 	if (!hw) {
1257 		pr_err("%s: Cannot allocate network device\n",
1258 		       trans->info.name);
1259 		err = -ENOMEM;
1260 		goto out;
1261 	}
1262 
1263 	op_mode = hw->priv;
1264 	op_mode->ops = &iwl_dvm_ops;
1265 	priv = IWL_OP_MODE_GET_DVM(op_mode);
1266 	priv->trans = trans;
1267 	priv->dev = trans->dev;
1268 	priv->cfg = cfg;
1269 	priv->fw = fw;
1270 
1271 	switch (priv->trans->mac_cfg->device_family) {
1272 	case IWL_DEVICE_FAMILY_1000:
1273 	case IWL_DEVICE_FAMILY_100:
1274 		priv->lib = &iwl_dvm_1000_cfg;
1275 		break;
1276 	case IWL_DEVICE_FAMILY_2000:
1277 		priv->lib = &iwl_dvm_2000_cfg;
1278 		break;
1279 	case IWL_DEVICE_FAMILY_105:
1280 		priv->lib = &iwl_dvm_105_cfg;
1281 		break;
1282 	case IWL_DEVICE_FAMILY_2030:
1283 	case IWL_DEVICE_FAMILY_135:
1284 		priv->lib = &iwl_dvm_2030_cfg;
1285 		break;
1286 	case IWL_DEVICE_FAMILY_5000:
1287 		priv->lib = &iwl_dvm_5000_cfg;
1288 		break;
1289 	case IWL_DEVICE_FAMILY_5150:
1290 		priv->lib = &iwl_dvm_5150_cfg;
1291 		break;
1292 	case IWL_DEVICE_FAMILY_6000:
1293 	case IWL_DEVICE_FAMILY_6000i:
1294 		priv->lib = &iwl_dvm_6000_cfg;
1295 		break;
1296 	case IWL_DEVICE_FAMILY_6005:
1297 		priv->lib = &iwl_dvm_6005_cfg;
1298 		break;
1299 	case IWL_DEVICE_FAMILY_6050:
1300 	case IWL_DEVICE_FAMILY_6150:
1301 		priv->lib = &iwl_dvm_6050_cfg;
1302 		break;
1303 	case IWL_DEVICE_FAMILY_6030:
1304 		priv->lib = &iwl_dvm_6030_cfg;
1305 		break;
1306 	default:
1307 		break;
1308 	}
1309 
1310 	if (WARN_ON(!priv->lib)) {
1311 		err = -ENODEV;
1312 		goto out_free_hw;
1313 	}
1314 
1315 	/*
1316 	 * Populate the state variables that the transport layer needs
1317 	 * to know about.
1318 	 */
1319 	BUILD_BUG_ON(sizeof(no_reclaim_cmds) >
1320 		     sizeof(trans->conf.no_reclaim_cmds));
1321 	memcpy(trans->conf.no_reclaim_cmds, no_reclaim_cmds,
1322 	       sizeof(no_reclaim_cmds));
1323 	trans->conf.n_no_reclaim_cmds = ARRAY_SIZE(no_reclaim_cmds);
1324 
1325 	switch (iwlwifi_mod_params.amsdu_size) {
1326 	case IWL_AMSDU_DEF:
1327 	case IWL_AMSDU_4K:
1328 		trans->conf.rx_buf_size = IWL_AMSDU_4K;
1329 		break;
1330 	case IWL_AMSDU_8K:
1331 		trans->conf.rx_buf_size = IWL_AMSDU_8K;
1332 		break;
1333 	case IWL_AMSDU_12K:
1334 	default:
1335 		trans->conf.rx_buf_size = IWL_AMSDU_4K;
1336 		pr_err("Unsupported amsdu_size: %d\n",
1337 		       iwlwifi_mod_params.amsdu_size);
1338 	}
1339 
1340 	trans->conf.command_groups = iwl_dvm_groups;
1341 	trans->conf.command_groups_size = ARRAY_SIZE(iwl_dvm_groups);
1342 
1343 	trans->conf.cmd_fifo = IWLAGN_CMD_FIFO_NUM;
1344 	trans->conf.cb_data_offs = offsetof(struct ieee80211_tx_info,
1345 					    driver_data[2]);
1346 
1347 	WARN_ON(sizeof(priv->transport_queue_stop) * BITS_PER_BYTE <
1348 		priv->trans->mac_cfg->base->num_of_queues);
1349 
1350 	ucode_flags = fw->ucode_capa.flags;
1351 
1352 	if (ucode_flags & IWL_UCODE_TLV_FLAGS_PAN) {
1353 		priv->sta_key_max_num = STA_KEY_MAX_NUM_PAN;
1354 		trans->conf.cmd_queue = IWL_IPAN_CMD_QUEUE_NUM;
1355 	} else {
1356 		priv->sta_key_max_num = STA_KEY_MAX_NUM;
1357 		trans->conf.cmd_queue = IWL_DEFAULT_CMD_QUEUE_NUM;
1358 	}
1359 
1360 	trans->conf.rx_mpdu_cmd = REPLY_RX_MPDU_CMD;
1361 	trans->conf.rx_mpdu_cmd_hdr_size = sizeof(struct iwl_rx_mpdu_res_start);
1362 
1363 	iwl_trans_op_mode_enter(priv->trans, op_mode);
1364 
1365 	/* At this point both hw and priv are allocated. */
1366 
1367 	SET_IEEE80211_DEV(priv->hw, priv->trans->dev);
1368 
1369 	iwl_option_config(priv);
1370 
1371 	IWL_DEBUG_INFO(priv, "*** LOAD DRIVER ***\n");
1372 
1373 	/* bt channel inhibition enabled*/
1374 	priv->bt_ch_announce = true;
1375 	IWL_DEBUG_INFO(priv, "BT channel inhibition is %s\n",
1376 		       (priv->bt_ch_announce) ? "On" : "Off");
1377 
1378 	/* these spin locks will be used in apm_ops.init and EEPROM access
1379 	 * we should init now
1380 	 */
1381 	spin_lock_init(&priv->statistics.lock);
1382 
1383 	/***********************
1384 	 * 2. Read REV register
1385 	 ***********************/
1386 	IWL_INFO(priv, "Detected %s, REV=0x%X\n",
1387 		priv->trans->info.name, priv->trans->info.hw_rev);
1388 
1389 	err = iwl_trans_start_hw(priv->trans);
1390 	if (err)
1391 		goto out_leave_trans;
1392 
1393 	/* Read the EEPROM */
1394 	err = iwl_read_eeprom(priv->trans, &priv->eeprom_blob,
1395 			      &priv->eeprom_blob_size);
1396 	if (err) {
1397 		IWL_ERR(priv, "Unable to init EEPROM\n");
1398 		goto out_leave_trans;
1399 	}
1400 
1401 	/* Reset chip to save power until we load uCode during "up". */
1402 	iwl_trans_stop_device(priv->trans);
1403 
1404 	priv->nvm_data = iwl_parse_eeprom_data(priv->trans, priv->cfg,
1405 					       priv->eeprom_blob,
1406 					       priv->eeprom_blob_size);
1407 	if (!priv->nvm_data) {
1408 		err = -ENOMEM;
1409 		goto out_free_eeprom_blob;
1410 	}
1411 
1412 	err = iwl_nvm_check_version(priv->nvm_data, priv->trans);
1413 	if (err)
1414 		goto out_free_eeprom;
1415 
1416 	err = iwl_eeprom_init_hw_params(priv);
1417 	if (err)
1418 		goto out_free_eeprom;
1419 
1420 	/* extract MAC Address */
1421 	memcpy(priv->addresses[0].addr, priv->nvm_data->hw_addr, ETH_ALEN);
1422 	IWL_DEBUG_INFO(priv, "MAC address: %pM\n", priv->addresses[0].addr);
1423 	priv->hw->wiphy->addresses = priv->addresses;
1424 	priv->hw->wiphy->n_addresses = 1;
1425 	num_mac = priv->nvm_data->n_hw_addrs;
1426 	if (num_mac > 1) {
1427 		memcpy(priv->addresses[1].addr, priv->addresses[0].addr,
1428 		       ETH_ALEN);
1429 		priv->addresses[1].addr[5]++;
1430 		priv->hw->wiphy->n_addresses++;
1431 	}
1432 
1433 	/************************
1434 	 * 4. Setup HW constants
1435 	 ************************/
1436 	iwl_set_hw_params(priv);
1437 
1438 	if (!(priv->nvm_data->sku_cap_ipan_enable)) {
1439 		IWL_DEBUG_INFO(priv, "Your EEPROM disabled PAN\n");
1440 		ucode_flags &= ~IWL_UCODE_TLV_FLAGS_PAN;
1441 		/*
1442 		 * if not PAN, then don't support P2P -- might be a uCode
1443 		 * packaging bug or due to the eeprom check above
1444 		 */
1445 		priv->sta_key_max_num = STA_KEY_MAX_NUM;
1446 		trans->conf.cmd_queue = IWL_DEFAULT_CMD_QUEUE_NUM;
1447 	}
1448 
1449 	/*******************
1450 	 * 5. Setup priv
1451 	 *******************/
1452 	for (i = 0; i < IWL_MAX_HW_QUEUES; i++) {
1453 		priv->queue_to_mac80211[i] = IWL_INVALID_MAC80211_QUEUE;
1454 		if (i < IWLAGN_FIRST_AMPDU_QUEUE &&
1455 		    i != IWL_DEFAULT_CMD_QUEUE_NUM &&
1456 		    i != IWL_IPAN_CMD_QUEUE_NUM)
1457 			priv->queue_to_mac80211[i] = i;
1458 		atomic_set(&priv->queue_stop_count[i], 0);
1459 	}
1460 
1461 	err = iwl_init_drv(priv);
1462 	if (err)
1463 		goto out_free_eeprom;
1464 
1465 	/* At this point both hw and priv are initialized. */
1466 
1467 	/********************
1468 	 * 6. Setup services
1469 	 ********************/
1470 	err = iwl_setup_deferred_work(priv);
1471 	if (err)
1472 		goto out_uninit_drv;
1473 
1474 	iwl_setup_rx_handlers(priv);
1475 
1476 	iwl_power_initialize(priv);
1477 	iwl_tt_initialize(priv);
1478 
1479 	snprintf(priv->hw->wiphy->fw_version,
1480 		 sizeof(priv->hw->wiphy->fw_version),
1481 		 "%.31s", fw->fw_version);
1482 
1483 	priv->new_scan_threshold_behaviour =
1484 		!!(ucode_flags & IWL_UCODE_TLV_FLAGS_NEWSCAN);
1485 
1486 	priv->phy_calib_chain_noise_reset_cmd =
1487 		fw->ucode_capa.standard_phy_calibration_size;
1488 	priv->phy_calib_chain_noise_gain_cmd =
1489 		fw->ucode_capa.standard_phy_calibration_size + 1;
1490 
1491 	/* initialize all valid contexts */
1492 	iwl_init_context(priv, ucode_flags);
1493 
1494 	/**************************************************
1495 	 * This is still part of probe() in a sense...
1496 	 *
1497 	 * 7. Setup and register with mac80211 and debugfs
1498 	 **************************************************/
1499 	err = iwlagn_mac_setup_register(priv, &fw->ucode_capa);
1500 	if (err)
1501 		goto out_destroy_workqueue;
1502 
1503 	iwl_dbgfs_register(priv, dbgfs_dir);
1504 
1505 	return op_mode;
1506 
1507 out_destroy_workqueue:
1508 	iwl_tt_exit(priv);
1509 	iwl_cancel_deferred_work(priv);
1510 	destroy_workqueue(priv->workqueue);
1511 	priv->workqueue = NULL;
1512 out_uninit_drv:
1513 	iwl_uninit_drv(priv);
1514 out_free_eeprom_blob:
1515 	kfree(priv->eeprom_blob);
1516 out_free_eeprom:
1517 	kfree(priv->nvm_data);
1518 out_leave_trans:
1519 	iwl_trans_op_mode_leave(priv->trans);
1520 out_free_hw:
1521 	ieee80211_free_hw(priv->hw);
1522 out:
1523 	return ERR_PTR(err);
1524 }
1525 
iwl_op_mode_dvm_stop(struct iwl_op_mode * op_mode)1526 static void iwl_op_mode_dvm_stop(struct iwl_op_mode *op_mode)
1527 {
1528 	struct iwl_priv *priv = IWL_OP_MODE_GET_DVM(op_mode);
1529 
1530 	IWL_DEBUG_INFO(priv, "*** UNLOAD DRIVER ***\n");
1531 
1532 	iwlagn_mac_unregister(priv);
1533 
1534 	iwl_tt_exit(priv);
1535 
1536 	kfree(priv->eeprom_blob);
1537 	kfree(priv->nvm_data);
1538 
1539 	/*netif_stop_queue(dev); */
1540 
1541 	/* ieee80211_unregister_hw calls iwlagn_mac_stop, which flushes
1542 	 * priv->workqueue... so we can't take down the workqueue
1543 	 * until now... */
1544 	destroy_workqueue(priv->workqueue);
1545 	priv->workqueue = NULL;
1546 
1547 	iwl_uninit_drv(priv);
1548 
1549 	dev_kfree_skb(priv->beacon_skb);
1550 
1551 	iwl_trans_op_mode_leave(priv->trans);
1552 	ieee80211_free_hw(priv->hw);
1553 }
1554 
1555 static const char * const desc_lookup_text[] = {
1556 	"OK",
1557 	"FAIL",
1558 	"BAD_PARAM",
1559 	"BAD_CHECKSUM",
1560 	"NMI_INTERRUPT_WDG",
1561 	"SYSASSERT",
1562 	"FATAL_ERROR",
1563 	"BAD_COMMAND",
1564 	"HW_ERROR_TUNE_LOCK",
1565 	"HW_ERROR_TEMPERATURE",
1566 	"ILLEGAL_CHAN_FREQ",
1567 	"VCC_NOT_STABLE",
1568 	"FH_ERROR",
1569 	"NMI_INTERRUPT_HOST",
1570 	"NMI_INTERRUPT_ACTION_PT",
1571 	"NMI_INTERRUPT_UNKNOWN",
1572 	"UCODE_VERSION_MISMATCH",
1573 	"HW_ERROR_ABS_LOCK",
1574 	"HW_ERROR_CAL_LOCK_FAIL",
1575 	"NMI_INTERRUPT_INST_ACTION_PT",
1576 	"NMI_INTERRUPT_DATA_ACTION_PT",
1577 	"NMI_TRM_HW_ER",
1578 	"NMI_INTERRUPT_TRM",
1579 	"NMI_INTERRUPT_BREAK_POINT",
1580 	"DEBUG_0",
1581 	"DEBUG_1",
1582 	"DEBUG_2",
1583 	"DEBUG_3",
1584 };
1585 
1586 static struct { char *name; u8 num; } advanced_lookup[] = {
1587 	{ "NMI_INTERRUPT_WDG", 0x34 },
1588 	{ "SYSASSERT", 0x35 },
1589 	{ "UCODE_VERSION_MISMATCH", 0x37 },
1590 	{ "BAD_COMMAND", 0x38 },
1591 	{ "NMI_INTERRUPT_DATA_ACTION_PT", 0x3C },
1592 	{ "FATAL_ERROR", 0x3D },
1593 	{ "NMI_TRM_HW_ERR", 0x46 },
1594 	{ "NMI_INTERRUPT_TRM", 0x4C },
1595 	{ "NMI_INTERRUPT_BREAK_POINT", 0x54 },
1596 	{ "NMI_INTERRUPT_WDG_RXF_FULL", 0x5C },
1597 	{ "NMI_INTERRUPT_WDG_NO_RBD_RXF_FULL", 0x64 },
1598 	{ "NMI_INTERRUPT_HOST", 0x66 },
1599 	{ "NMI_INTERRUPT_ACTION_PT", 0x7C },
1600 	{ "NMI_INTERRUPT_UNKNOWN", 0x84 },
1601 	{ "NMI_INTERRUPT_INST_ACTION_PT", 0x86 },
1602 	{ "ADVANCED_SYSASSERT", 0 },
1603 };
1604 
desc_lookup(u32 num)1605 static const char *desc_lookup(u32 num)
1606 {
1607 	int i;
1608 	int max = ARRAY_SIZE(desc_lookup_text);
1609 
1610 	if (num < max)
1611 		return desc_lookup_text[num];
1612 
1613 	max = ARRAY_SIZE(advanced_lookup) - 1;
1614 	for (i = 0; i < max; i++) {
1615 		if (advanced_lookup[i].num == num)
1616 			break;
1617 	}
1618 	return advanced_lookup[i].name;
1619 }
1620 
1621 #define ERROR_START_OFFSET  (1 * sizeof(u32))
1622 #define ERROR_ELEM_SIZE     (7 * sizeof(u32))
1623 
iwl_dump_nic_error_log(struct iwl_priv * priv)1624 static void iwl_dump_nic_error_log(struct iwl_priv *priv)
1625 {
1626 	struct iwl_trans *trans = priv->trans;
1627 	u32 base;
1628 	struct iwl_error_event_table table;
1629 
1630 	base = priv->device_pointers.error_event_table;
1631 	if (priv->cur_ucode == IWL_UCODE_INIT) {
1632 		if (!base)
1633 			base = priv->fw->init_errlog_ptr;
1634 	} else {
1635 		if (!base)
1636 			base = priv->fw->inst_errlog_ptr;
1637 	}
1638 
1639 	if (!iwlagn_hw_valid_rtc_data_addr(base)) {
1640 		IWL_ERR(priv,
1641 			"Not valid error log pointer 0x%08X for %s uCode\n",
1642 			base,
1643 			(priv->cur_ucode == IWL_UCODE_INIT)
1644 					? "Init" : "RT");
1645 		return;
1646 	}
1647 
1648 	/*TODO: Update dbgfs with ISR error stats obtained below */
1649 	iwl_trans_read_mem_bytes(trans, base, &table, sizeof(table));
1650 
1651 	if (ERROR_START_OFFSET <= table.valid * ERROR_ELEM_SIZE) {
1652 		IWL_ERR(trans, "Start IWL Error Log Dump:\n");
1653 		IWL_ERR(trans, "Status: 0x%08lX, count: %d\n",
1654 			priv->status, table.valid);
1655 	}
1656 
1657 	IWL_ERR(priv, "0x%08X | %-28s\n", table.error_id,
1658 		desc_lookup(table.error_id));
1659 	IWL_ERR(priv, "0x%08X | uPc\n", table.pc);
1660 	IWL_ERR(priv, "0x%08X | branchlink1\n", table.blink1);
1661 	IWL_ERR(priv, "0x%08X | branchlink2\n", table.blink2);
1662 	IWL_ERR(priv, "0x%08X | interruptlink1\n", table.ilink1);
1663 	IWL_ERR(priv, "0x%08X | interruptlink2\n", table.ilink2);
1664 	IWL_ERR(priv, "0x%08X | data1\n", table.data1);
1665 	IWL_ERR(priv, "0x%08X | data2\n", table.data2);
1666 	IWL_ERR(priv, "0x%08X | line\n", table.line);
1667 	IWL_ERR(priv, "0x%08X | beacon time\n", table.bcon_time);
1668 	IWL_ERR(priv, "0x%08X | tsf low\n", table.tsf_low);
1669 	IWL_ERR(priv, "0x%08X | tsf hi\n", table.tsf_hi);
1670 	IWL_ERR(priv, "0x%08X | time gp1\n", table.gp1);
1671 	IWL_ERR(priv, "0x%08X | time gp2\n", table.gp2);
1672 	IWL_ERR(priv, "0x%08X | time gp3\n", table.gp3);
1673 	IWL_ERR(priv, "0x%08X | uCode version\n", table.ucode_ver);
1674 	IWL_ERR(priv, "0x%08X | hw version\n", table.hw_ver);
1675 	IWL_ERR(priv, "0x%08X | board version\n", table.brd_ver);
1676 	IWL_ERR(priv, "0x%08X | hcmd\n", table.hcmd);
1677 	IWL_ERR(priv, "0x%08X | isr0\n", table.isr0);
1678 	IWL_ERR(priv, "0x%08X | isr1\n", table.isr1);
1679 	IWL_ERR(priv, "0x%08X | isr2\n", table.isr2);
1680 	IWL_ERR(priv, "0x%08X | isr3\n", table.isr3);
1681 	IWL_ERR(priv, "0x%08X | isr4\n", table.isr4);
1682 	IWL_ERR(priv, "0x%08X | isr_pref\n", table.isr_pref);
1683 	IWL_ERR(priv, "0x%08X | wait_event\n", table.wait_event);
1684 	IWL_ERR(priv, "0x%08X | l2p_control\n", table.l2p_control);
1685 	IWL_ERR(priv, "0x%08X | l2p_duration\n", table.l2p_duration);
1686 	IWL_ERR(priv, "0x%08X | l2p_mhvalid\n", table.l2p_mhvalid);
1687 	IWL_ERR(priv, "0x%08X | l2p_addr_match\n", table.l2p_addr_match);
1688 	IWL_ERR(priv, "0x%08X | lmpm_pmg_sel\n", table.lmpm_pmg_sel);
1689 	IWL_ERR(priv, "0x%08X | timestamp\n", table.u_timestamp);
1690 	IWL_ERR(priv, "0x%08X | flow_handler\n", table.flow_handler);
1691 }
1692 
1693 #define EVENT_START_OFFSET  (4 * sizeof(u32))
1694 
1695 /*
1696  * iwl_print_event_log - Dump error event log to syslog
1697  */
iwl_print_event_log(struct iwl_priv * priv,u32 start_idx,u32 num_events,u32 mode,int pos,char ** buf,size_t bufsz)1698 static int iwl_print_event_log(struct iwl_priv *priv, u32 start_idx,
1699 			       u32 num_events, u32 mode,
1700 			       int pos, char **buf, size_t bufsz)
1701 {
1702 	u32 i;
1703 	u32 base;       /* SRAM byte address of event log header */
1704 	u32 event_size; /* 2 u32s, or 3 u32s if timestamp recorded */
1705 	u32 ptr;        /* SRAM byte address of log data */
1706 	u32 ev, time, data; /* event log data */
1707 
1708 	struct iwl_trans *trans = priv->trans;
1709 
1710 	if (num_events == 0)
1711 		return pos;
1712 
1713 	base = priv->device_pointers.log_event_table;
1714 	if (priv->cur_ucode == IWL_UCODE_INIT) {
1715 		if (!base)
1716 			base = priv->fw->init_evtlog_ptr;
1717 	} else {
1718 		if (!base)
1719 			base = priv->fw->inst_evtlog_ptr;
1720 	}
1721 
1722 	if (mode == 0)
1723 		event_size = 2 * sizeof(u32);
1724 	else
1725 		event_size = 3 * sizeof(u32);
1726 
1727 	ptr = base + EVENT_START_OFFSET + (start_idx * event_size);
1728 
1729 	/* Make sure device is powered up for SRAM reads */
1730 	if (!iwl_trans_grab_nic_access(trans))
1731 		return pos;
1732 
1733 	/* Set starting address; reads will auto-increment */
1734 	iwl_write32(trans, HBUS_TARG_MEM_RADDR, ptr);
1735 
1736 	/* "time" is actually "data" for mode 0 (no timestamp).
1737 	* place event id # at far right for easier visual parsing. */
1738 	for (i = 0; i < num_events; i++) {
1739 		ev = iwl_read32(trans, HBUS_TARG_MEM_RDAT);
1740 		time = iwl_read32(trans, HBUS_TARG_MEM_RDAT);
1741 		if (mode == 0) {
1742 			/* data, ev */
1743 			if (bufsz) {
1744 				pos += scnprintf(*buf + pos, bufsz - pos,
1745 						"EVT_LOG:0x%08x:%04u\n",
1746 						time, ev);
1747 			} else {
1748 				trace_iwlwifi_dev_ucode_event(trans->dev, 0,
1749 					time, ev);
1750 				IWL_ERR(priv, "EVT_LOG:0x%08x:%04u\n",
1751 					time, ev);
1752 			}
1753 		} else {
1754 			data = iwl_read32(trans, HBUS_TARG_MEM_RDAT);
1755 			if (bufsz) {
1756 				pos += scnprintf(*buf + pos, bufsz - pos,
1757 						"EVT_LOGT:%010u:0x%08x:%04u\n",
1758 						 time, data, ev);
1759 			} else {
1760 				IWL_ERR(priv, "EVT_LOGT:%010u:0x%08x:%04u\n",
1761 					time, data, ev);
1762 				trace_iwlwifi_dev_ucode_event(trans->dev, time,
1763 					data, ev);
1764 			}
1765 		}
1766 	}
1767 
1768 	/* Allow device to power down */
1769 	iwl_trans_release_nic_access(trans);
1770 	return pos;
1771 }
1772 
1773 /*
1774  * iwl_print_last_event_logs - Dump the newest # of event log to syslog
1775  */
iwl_print_last_event_logs(struct iwl_priv * priv,u32 capacity,u32 num_wraps,u32 next_entry,u32 size,u32 mode,int pos,char ** buf,size_t bufsz)1776 static int iwl_print_last_event_logs(struct iwl_priv *priv, u32 capacity,
1777 				    u32 num_wraps, u32 next_entry,
1778 				    u32 size, u32 mode,
1779 				    int pos, char **buf, size_t bufsz)
1780 {
1781 	/*
1782 	 * display the newest DEFAULT_LOG_ENTRIES entries
1783 	 * i.e the entries just before the next ont that uCode would fill.
1784 	 */
1785 	if (num_wraps) {
1786 		if (next_entry < size) {
1787 			pos = iwl_print_event_log(priv,
1788 						capacity - (size - next_entry),
1789 						size - next_entry, mode,
1790 						pos, buf, bufsz);
1791 			pos = iwl_print_event_log(priv, 0,
1792 						  next_entry, mode,
1793 						  pos, buf, bufsz);
1794 		} else
1795 			pos = iwl_print_event_log(priv, next_entry - size,
1796 						  size, mode, pos, buf, bufsz);
1797 	} else {
1798 		if (next_entry < size) {
1799 			pos = iwl_print_event_log(priv, 0, next_entry,
1800 						  mode, pos, buf, bufsz);
1801 		} else {
1802 			pos = iwl_print_event_log(priv, next_entry - size,
1803 						  size, mode, pos, buf, bufsz);
1804 		}
1805 	}
1806 	return pos;
1807 }
1808 
1809 #define DEFAULT_DUMP_EVENT_LOG_ENTRIES (20)
1810 
iwl_dump_nic_event_log(struct iwl_priv * priv,bool full_log,char ** buf)1811 int iwl_dump_nic_event_log(struct iwl_priv *priv, bool full_log,
1812 			    char **buf)
1813 {
1814 	u32 base;       /* SRAM byte address of event log header */
1815 	u32 capacity;   /* event log capacity in # entries */
1816 	u32 mode;       /* 0 - no timestamp, 1 - timestamp recorded */
1817 	u32 num_wraps;  /* # times uCode wrapped to top of log */
1818 	u32 next_entry; /* index of next entry to be written by uCode */
1819 	u32 size;       /* # entries that we'll print */
1820 	u32 logsize;
1821 	int pos = 0;
1822 	size_t bufsz = 0;
1823 	struct iwl_trans *trans = priv->trans;
1824 
1825 	base = priv->device_pointers.log_event_table;
1826 	if (priv->cur_ucode == IWL_UCODE_INIT) {
1827 		logsize = priv->fw->init_evtlog_size;
1828 		if (!base)
1829 			base = priv->fw->init_evtlog_ptr;
1830 	} else {
1831 		logsize = priv->fw->inst_evtlog_size;
1832 		if (!base)
1833 			base = priv->fw->inst_evtlog_ptr;
1834 	}
1835 
1836 	if (!iwlagn_hw_valid_rtc_data_addr(base)) {
1837 		IWL_ERR(priv,
1838 			"Invalid event log pointer 0x%08X for %s uCode\n",
1839 			base,
1840 			(priv->cur_ucode == IWL_UCODE_INIT)
1841 					? "Init" : "RT");
1842 		return -EINVAL;
1843 	}
1844 
1845 	/* event log header */
1846 	capacity = iwl_trans_read_mem32(trans, base);
1847 	mode = iwl_trans_read_mem32(trans, base + (1 * sizeof(u32)));
1848 	num_wraps = iwl_trans_read_mem32(trans, base + (2 * sizeof(u32)));
1849 	next_entry = iwl_trans_read_mem32(trans, base + (3 * sizeof(u32)));
1850 
1851 	if (capacity > logsize) {
1852 		IWL_ERR(priv, "Log capacity %d is bogus, limit to %d "
1853 			"entries\n", capacity, logsize);
1854 		capacity = logsize;
1855 	}
1856 
1857 	if (next_entry > logsize) {
1858 		IWL_ERR(priv, "Log write index %d is bogus, limit to %d\n",
1859 			next_entry, logsize);
1860 		next_entry = logsize;
1861 	}
1862 
1863 	size = num_wraps ? capacity : next_entry;
1864 
1865 	/* bail out if nothing in log */
1866 	if (size == 0) {
1867 		IWL_ERR(trans, "Start IWL Event Log Dump: nothing in log\n");
1868 		return pos;
1869 	}
1870 
1871 	if (!(iwl_have_debug_level(IWL_DL_FW)) && !full_log)
1872 		size = (size > DEFAULT_DUMP_EVENT_LOG_ENTRIES)
1873 			? DEFAULT_DUMP_EVENT_LOG_ENTRIES : size;
1874 	IWL_ERR(priv, "Start IWL Event Log Dump: display last %u entries\n",
1875 		size);
1876 
1877 #ifdef CONFIG_IWLWIFI_DEBUG
1878 	if (buf) {
1879 		if (full_log)
1880 			bufsz = capacity * 48;
1881 		else
1882 			bufsz = size * 48;
1883 		*buf = kmalloc(bufsz, GFP_KERNEL);
1884 		if (!*buf)
1885 			return -ENOMEM;
1886 	}
1887 	if (iwl_have_debug_level(IWL_DL_FW) || full_log) {
1888 		/*
1889 		 * if uCode has wrapped back to top of log,
1890 		 * start at the oldest entry,
1891 		 * i.e the next one that uCode would fill.
1892 		 */
1893 		if (num_wraps)
1894 			pos = iwl_print_event_log(priv, next_entry,
1895 						capacity - next_entry, mode,
1896 						pos, buf, bufsz);
1897 		/* (then/else) start at top of log */
1898 		pos = iwl_print_event_log(priv, 0,
1899 					  next_entry, mode, pos, buf, bufsz);
1900 	} else
1901 		pos = iwl_print_last_event_logs(priv, capacity, num_wraps,
1902 						next_entry, size, mode,
1903 						pos, buf, bufsz);
1904 #else
1905 	pos = iwl_print_last_event_logs(priv, capacity, num_wraps,
1906 					next_entry, size, mode,
1907 					pos, buf, bufsz);
1908 #endif
1909 	return pos;
1910 }
1911 
iwlagn_fw_error(struct iwl_priv * priv,bool ondemand)1912 static void iwlagn_fw_error(struct iwl_priv *priv, bool ondemand)
1913 {
1914 	unsigned int reload_msec;
1915 	unsigned long reload_jiffies;
1916 
1917 	/* uCode is no longer loaded. */
1918 	priv->ucode_loaded = false;
1919 
1920 	/* Keep the restart process from trying to send host
1921 	 * commands by clearing the ready bit */
1922 	clear_bit(STATUS_READY, &priv->status);
1923 
1924 	if (!ondemand) {
1925 		/*
1926 		 * If firmware keep reloading, then it indicate something
1927 		 * serious wrong and firmware having problem to recover
1928 		 * from it. Instead of keep trying which will fill the syslog
1929 		 * and hang the system, let's just stop it
1930 		 */
1931 		reload_jiffies = jiffies;
1932 		reload_msec = jiffies_to_msecs((long) reload_jiffies -
1933 					(long) priv->reload_jiffies);
1934 		priv->reload_jiffies = reload_jiffies;
1935 		if (reload_msec <= IWL_MIN_RELOAD_DURATION) {
1936 			priv->reload_count++;
1937 			if (priv->reload_count >= IWL_MAX_CONTINUE_RELOAD_CNT) {
1938 				IWL_ERR(priv, "BUG_ON, Stop restarting\n");
1939 				return;
1940 			}
1941 		} else
1942 			priv->reload_count = 0;
1943 	}
1944 
1945 	if (!test_bit(STATUS_EXIT_PENDING, &priv->status)) {
1946 		if (iwlwifi_mod_params.fw_restart) {
1947 			IWL_DEBUG_FW(priv,
1948 				     "Restarting adapter due to uCode error.\n");
1949 			queue_work(priv->workqueue, &priv->restart);
1950 		} else
1951 			IWL_DEBUG_FW(priv,
1952 				     "Detected FW error, but not restarting\n");
1953 	}
1954 }
1955 
iwl_nic_error(struct iwl_op_mode * op_mode,enum iwl_fw_error_type type)1956 static void iwl_nic_error(struct iwl_op_mode *op_mode,
1957 			  enum iwl_fw_error_type type)
1958 {
1959 	struct iwl_priv *priv = IWL_OP_MODE_GET_DVM(op_mode);
1960 
1961 	/* Set the FW error flag -- cleared on iwl_down */
1962 	set_bit(STATUS_FW_ERROR, &priv->status);
1963 
1964 	iwl_abort_notification_waits(&priv->notif_wait);
1965 
1966 	if (type == IWL_ERR_TYPE_CMD_QUEUE_FULL && iwl_check_for_ct_kill(priv))
1967 		return;
1968 
1969 	IWL_ERR(priv, "Loaded firmware version: %s\n",
1970 		priv->fw->fw_version);
1971 
1972 	if (type == IWL_ERR_TYPE_CMD_QUEUE_FULL) {
1973 		IWL_ERR(priv, "Command queue full!\n");
1974 	} else {
1975 		iwl_dump_nic_error_log(priv);
1976 		iwl_dump_nic_event_log(priv, false, NULL);
1977 	}
1978 
1979 	if (iwl_have_debug_level(IWL_DL_FW))
1980 		iwl_print_rx_config_cmd(priv, IWL_RXON_CTX_BSS);
1981 }
1982 
iwlagn_sw_reset(struct iwl_op_mode * op_mode,enum iwl_fw_error_type type)1983 static bool iwlagn_sw_reset(struct iwl_op_mode *op_mode,
1984 			    enum iwl_fw_error_type type)
1985 {
1986 	struct iwl_priv *priv = IWL_OP_MODE_GET_DVM(op_mode);
1987 
1988 	if (type == IWL_ERR_TYPE_CMD_QUEUE_FULL && iwl_check_for_ct_kill(priv))
1989 		return false;
1990 
1991 	iwlagn_fw_error(priv, false);
1992 	return true;
1993 }
1994 
1995 #define EEPROM_RF_CONFIG_TYPE_MAX      0x3
1996 
iwl_nic_config(struct iwl_op_mode * op_mode)1997 static void iwl_nic_config(struct iwl_op_mode *op_mode)
1998 {
1999 	struct iwl_priv *priv = IWL_OP_MODE_GET_DVM(op_mode);
2000 
2001 	/* SKU Control */
2002 	iwl_trans_set_bits_mask(priv->trans, CSR_HW_IF_CONFIG_REG,
2003 				CSR_HW_IF_CONFIG_REG_MSK_MAC_STEP_DASH,
2004 				CSR_HW_REV_STEP_DASH(priv->trans->info.hw_rev));
2005 
2006 	/* write radio config values to register */
2007 	if (priv->nvm_data->radio_cfg_type <= EEPROM_RF_CONFIG_TYPE_MAX) {
2008 		u32 reg_val =
2009 			priv->nvm_data->radio_cfg_type <<
2010 				CSR_HW_IF_CONFIG_REG_POS_PHY_TYPE |
2011 			priv->nvm_data->radio_cfg_step <<
2012 				CSR_HW_IF_CONFIG_REG_POS_PHY_STEP |
2013 			priv->nvm_data->radio_cfg_dash <<
2014 				CSR_HW_IF_CONFIG_REG_POS_PHY_DASH;
2015 
2016 		iwl_trans_set_bits_mask(priv->trans, CSR_HW_IF_CONFIG_REG,
2017 					CSR_HW_IF_CONFIG_REG_MSK_PHY_TYPE |
2018 					CSR_HW_IF_CONFIG_REG_MSK_PHY_STEP |
2019 					CSR_HW_IF_CONFIG_REG_MSK_PHY_DASH,
2020 					reg_val);
2021 
2022 		IWL_INFO(priv, "Radio type=0x%x-0x%x-0x%x\n",
2023 			 priv->nvm_data->radio_cfg_type,
2024 			 priv->nvm_data->radio_cfg_step,
2025 			 priv->nvm_data->radio_cfg_dash);
2026 	} else {
2027 		WARN_ON(1);
2028 	}
2029 
2030 	/* set CSR_HW_CONFIG_REG for uCode use */
2031 	iwl_set_bit(priv->trans, CSR_HW_IF_CONFIG_REG,
2032 		    CSR_HW_IF_CONFIG_REG_BIT_RADIO_SI |
2033 		    CSR_HW_IF_CONFIG_REG_BIT_MAC_SI);
2034 
2035 	/* W/A : NIC is stuck in a reset state after Early PCIe power off
2036 	 * (PCIe power is lost before PERST# is asserted),
2037 	 * causing ME FW to lose ownership and not being able to obtain it back.
2038 	 */
2039 	iwl_set_bits_mask_prph(priv->trans, APMG_PS_CTRL_REG,
2040 			       APMG_PS_CTRL_EARLY_PWR_OFF_RESET_DIS,
2041 			       ~APMG_PS_CTRL_EARLY_PWR_OFF_RESET_DIS);
2042 
2043 	if (priv->lib->nic_config)
2044 		priv->lib->nic_config(priv);
2045 }
2046 
iwl_wimax_active(struct iwl_op_mode * op_mode)2047 static void iwl_wimax_active(struct iwl_op_mode *op_mode)
2048 {
2049 	struct iwl_priv *priv = IWL_OP_MODE_GET_DVM(op_mode);
2050 
2051 	clear_bit(STATUS_READY, &priv->status);
2052 	IWL_ERR(priv, "RF is used by WiMAX\n");
2053 }
2054 
iwl_stop_sw_queue(struct iwl_op_mode * op_mode,int queue)2055 static void iwl_stop_sw_queue(struct iwl_op_mode *op_mode, int queue)
2056 {
2057 	struct iwl_priv *priv = IWL_OP_MODE_GET_DVM(op_mode);
2058 	int mq = priv->queue_to_mac80211[queue];
2059 
2060 	if (WARN_ON_ONCE(mq == IWL_INVALID_MAC80211_QUEUE))
2061 		return;
2062 
2063 	if (atomic_inc_return(&priv->queue_stop_count[mq]) > 1) {
2064 		IWL_DEBUG_TX_QUEUES(priv,
2065 			"queue %d (mac80211 %d) already stopped\n",
2066 			queue, mq);
2067 		return;
2068 	}
2069 
2070 	set_bit(mq, &priv->transport_queue_stop);
2071 	ieee80211_stop_queue(priv->hw, mq);
2072 }
2073 
iwl_wake_sw_queue(struct iwl_op_mode * op_mode,int queue)2074 static void iwl_wake_sw_queue(struct iwl_op_mode *op_mode, int queue)
2075 {
2076 	struct iwl_priv *priv = IWL_OP_MODE_GET_DVM(op_mode);
2077 	int mq = priv->queue_to_mac80211[queue];
2078 
2079 	if (WARN_ON_ONCE(mq == IWL_INVALID_MAC80211_QUEUE))
2080 		return;
2081 
2082 	if (atomic_dec_return(&priv->queue_stop_count[mq]) > 0) {
2083 		IWL_DEBUG_TX_QUEUES(priv,
2084 			"queue %d (mac80211 %d) already awake\n",
2085 			queue, mq);
2086 		return;
2087 	}
2088 
2089 	clear_bit(mq, &priv->transport_queue_stop);
2090 
2091 	if (!priv->passive_no_rx)
2092 		ieee80211_wake_queue(priv->hw, mq);
2093 }
2094 
iwlagn_lift_passive_no_rx(struct iwl_priv * priv)2095 void iwlagn_lift_passive_no_rx(struct iwl_priv *priv)
2096 {
2097 	int mq;
2098 
2099 	if (!priv->passive_no_rx)
2100 		return;
2101 
2102 	for (mq = 0; mq < IWLAGN_FIRST_AMPDU_QUEUE; mq++) {
2103 		if (!test_bit(mq, &priv->transport_queue_stop)) {
2104 			IWL_DEBUG_TX_QUEUES(priv, "Wake queue %d\n", mq);
2105 			ieee80211_wake_queue(priv->hw, mq);
2106 		} else {
2107 			IWL_DEBUG_TX_QUEUES(priv, "Don't wake queue %d\n", mq);
2108 		}
2109 	}
2110 
2111 	priv->passive_no_rx = false;
2112 }
2113 
iwl_free_skb(struct iwl_op_mode * op_mode,struct sk_buff * skb)2114 static void iwl_free_skb(struct iwl_op_mode *op_mode, struct sk_buff *skb)
2115 {
2116 	struct iwl_priv *priv = IWL_OP_MODE_GET_DVM(op_mode);
2117 	struct ieee80211_tx_info *info;
2118 
2119 	info = IEEE80211_SKB_CB(skb);
2120 	iwl_trans_free_tx_cmd(priv->trans, info->driver_data[1]);
2121 	ieee80211_free_txskb(priv->hw, skb);
2122 }
2123 
iwl_set_hw_rfkill_state(struct iwl_op_mode * op_mode,bool state)2124 static bool iwl_set_hw_rfkill_state(struct iwl_op_mode *op_mode, bool state)
2125 {
2126 	struct iwl_priv *priv = IWL_OP_MODE_GET_DVM(op_mode);
2127 
2128 	if (state)
2129 		set_bit(STATUS_RF_KILL_HW, &priv->status);
2130 	else
2131 		clear_bit(STATUS_RF_KILL_HW, &priv->status);
2132 
2133 	wiphy_rfkill_set_hw_state(priv->hw->wiphy, state);
2134 
2135 	return false;
2136 }
2137 
2138 static const struct iwl_op_mode_ops iwl_dvm_ops = {
2139 	.start = iwl_op_mode_dvm_start,
2140 	.stop = iwl_op_mode_dvm_stop,
2141 	.rx = iwl_rx_dispatch,
2142 	.queue_full = iwl_stop_sw_queue,
2143 	.queue_not_full = iwl_wake_sw_queue,
2144 	.hw_rf_kill = iwl_set_hw_rfkill_state,
2145 	.free_skb = iwl_free_skb,
2146 	.nic_error = iwl_nic_error,
2147 	.sw_reset = iwlagn_sw_reset,
2148 	.nic_config = iwl_nic_config,
2149 	.wimax_active = iwl_wimax_active,
2150 };
2151 
2152 /*****************************************************************************
2153  *
2154  * driver and module entry point
2155  *
2156  *****************************************************************************/
iwl_init(void)2157 static int __init iwl_init(void)
2158 {
2159 
2160 	int ret;
2161 
2162 	ret = iwlagn_rate_control_register();
2163 	if (ret) {
2164 		pr_err("Unable to register rate control algorithm: %d\n", ret);
2165 		return ret;
2166 	}
2167 
2168 	ret = iwl_opmode_register("iwldvm", &iwl_dvm_ops);
2169 	if (ret) {
2170 		pr_err("Unable to register op_mode: %d\n", ret);
2171 		iwlagn_rate_control_unregister();
2172 	}
2173 
2174 	return ret;
2175 }
2176 module_init(iwl_init);
2177 
iwl_exit(void)2178 static void __exit iwl_exit(void)
2179 {
2180 	iwl_opmode_deregister("iwldvm");
2181 	iwlagn_rate_control_unregister();
2182 }
2183 module_exit(iwl_exit);
2184