1 /******************************************************************************
2  *
3  * This file is provided under a dual BSD/GPLv2 license.  When using or
4  * redistributing this file, you may do so under either license.
5  *
6  * GPL LICENSE SUMMARY
7  *
8  * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
9  * Copyright(c) 2013 - 2014 Intel Mobile Communications GmbH
10  *
11  * This program is free software; you can redistribute it and/or modify
12  * it under the terms of version 2 of the GNU General Public License as
13  * published by the Free Software Foundation.
14  *
15  * This program is distributed in the hope that it will be useful, but
16  * WITHOUT ANY WARRANTY; without even the implied warranty of
17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
18  * General Public License for more details.
19  *
20  * You should have received a copy of the GNU General Public License
21  * along with this program; if not, write to the Free Software
22  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
23  * USA
24  *
25  * The full GNU General Public License is included in this distribution
26  * in the file called COPYING.
27  *
28  * Contact Information:
29  *  Intel Linux Wireless <ilw@linux.intel.com>
30  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
31  *
32  * BSD LICENSE
33  *
34  * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
35  * Copyright(c) 2013 - 2014 Intel Mobile Communications GmbH
36  * All rights reserved.
37  *
38  * Redistribution and use in source and binary forms, with or without
39  * modification, are permitted provided that the following conditions
40  * are met:
41  *
42  *  * Redistributions of source code must retain the above copyright
43  *    notice, this list of conditions and the following disclaimer.
44  *  * Redistributions in binary form must reproduce the above copyright
45  *    notice, this list of conditions and the following disclaimer in
46  *    the documentation and/or other materials provided with the
47  *    distribution.
48  *  * Neither the name Intel Corporation nor the names of its
49  *    contributors may be used to endorse or promote products derived
50  *    from this software without specific prior written permission.
51  *
52  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
53  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
54  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
55  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
56  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
57  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
58  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
59  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
60  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
61  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
62  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
63  *
64  *****************************************************************************/
65 #include <linux/module.h>
66 #include <linux/vmalloc.h>
67 #include <net/mac80211.h>
68 
69 #include "iwl-notif-wait.h"
70 #include "iwl-trans.h"
71 #include "iwl-op-mode.h"
72 #include "iwl-fw.h"
73 #include "iwl-debug.h"
74 #include "iwl-drv.h"
75 #include "iwl-modparams.h"
76 #include "mvm.h"
77 #include "iwl-phy-db.h"
78 #include "iwl-eeprom-parse.h"
79 #include "iwl-csr.h"
80 #include "iwl-io.h"
81 #include "iwl-prph.h"
82 #include "rs.h"
83 #include "fw-api-scan.h"
84 #include "time-event.h"
85 
86 #define DRV_DESCRIPTION	"The new Intel(R) wireless AGN driver for Linux"
87 MODULE_DESCRIPTION(DRV_DESCRIPTION);
88 MODULE_AUTHOR(DRV_COPYRIGHT " " DRV_AUTHOR);
89 MODULE_LICENSE("GPL");
90 
91 static const struct iwl_op_mode_ops iwl_mvm_ops;
92 
93 struct iwl_mvm_mod_params iwlmvm_mod_params = {
94 	.power_scheme = IWL_POWER_SCHEME_BPS,
95 	.tfd_q_hang_detect = true
96 	/* rest of fields are 0 by default */
97 };
98 
99 module_param_named(init_dbg, iwlmvm_mod_params.init_dbg, bool, S_IRUGO);
100 MODULE_PARM_DESC(init_dbg,
101 		 "set to true to debug an ASSERT in INIT fw (default: false");
102 module_param_named(power_scheme, iwlmvm_mod_params.power_scheme, int, S_IRUGO);
103 MODULE_PARM_DESC(power_scheme,
104 		 "power management scheme: 1-active, 2-balanced, 3-low power, default: 2");
105 module_param_named(tfd_q_hang_detect, iwlmvm_mod_params.tfd_q_hang_detect,
106 		   bool, S_IRUGO);
107 MODULE_PARM_DESC(tfd_q_hang_detect,
108 		 "TFD queues hang detection (default: true");
109 
110 /*
111  * module init and exit functions
112  */
iwl_mvm_init(void)113 static int __init iwl_mvm_init(void)
114 {
115 	int ret;
116 
117 	ret = iwl_mvm_rate_control_register();
118 	if (ret) {
119 		pr_err("Unable to register rate control algorithm: %d\n", ret);
120 		return ret;
121 	}
122 
123 	ret = iwl_opmode_register("iwlmvm", &iwl_mvm_ops);
124 
125 	if (ret) {
126 		pr_err("Unable to register MVM op_mode: %d\n", ret);
127 		iwl_mvm_rate_control_unregister();
128 	}
129 
130 	return ret;
131 }
132 module_init(iwl_mvm_init);
133 
iwl_mvm_exit(void)134 static void __exit iwl_mvm_exit(void)
135 {
136 	iwl_opmode_deregister("iwlmvm");
137 	iwl_mvm_rate_control_unregister();
138 }
139 module_exit(iwl_mvm_exit);
140 
iwl_mvm_nic_config(struct iwl_op_mode * op_mode)141 static void iwl_mvm_nic_config(struct iwl_op_mode *op_mode)
142 {
143 	struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
144 	u8 radio_cfg_type, radio_cfg_step, radio_cfg_dash;
145 	u32 reg_val = 0;
146 	u32 phy_config = iwl_mvm_get_phy_config(mvm);
147 
148 	radio_cfg_type = (phy_config & FW_PHY_CFG_RADIO_TYPE) >>
149 			 FW_PHY_CFG_RADIO_TYPE_POS;
150 	radio_cfg_step = (phy_config & FW_PHY_CFG_RADIO_STEP) >>
151 			 FW_PHY_CFG_RADIO_STEP_POS;
152 	radio_cfg_dash = (phy_config & FW_PHY_CFG_RADIO_DASH) >>
153 			 FW_PHY_CFG_RADIO_DASH_POS;
154 
155 	/* SKU control */
156 	reg_val |= CSR_HW_REV_STEP(mvm->trans->hw_rev) <<
157 				CSR_HW_IF_CONFIG_REG_POS_MAC_STEP;
158 	reg_val |= CSR_HW_REV_DASH(mvm->trans->hw_rev) <<
159 				CSR_HW_IF_CONFIG_REG_POS_MAC_DASH;
160 
161 	/* radio configuration */
162 	reg_val |= radio_cfg_type << CSR_HW_IF_CONFIG_REG_POS_PHY_TYPE;
163 	reg_val |= radio_cfg_step << CSR_HW_IF_CONFIG_REG_POS_PHY_STEP;
164 	reg_val |= radio_cfg_dash << CSR_HW_IF_CONFIG_REG_POS_PHY_DASH;
165 
166 	WARN_ON((radio_cfg_type << CSR_HW_IF_CONFIG_REG_POS_PHY_TYPE) &
167 		 ~CSR_HW_IF_CONFIG_REG_MSK_PHY_TYPE);
168 
169 	/*
170 	 * TODO: Bits 7-8 of CSR in 8000 HW family set the ADC sampling, and
171 	 * shouldn't be set to any non-zero value. The same is supposed to be
172 	 * true of the other HW, but unsetting them (such as the 7260) causes
173 	 * automatic tests to fail on seemingly unrelated errors. Need to
174 	 * further investigate this, but for now we'll separate cases.
175 	 */
176 	if (mvm->trans->cfg->device_family != IWL_DEVICE_FAMILY_8000)
177 		reg_val |= CSR_HW_IF_CONFIG_REG_BIT_RADIO_SI;
178 
179 	iwl_trans_set_bits_mask(mvm->trans, CSR_HW_IF_CONFIG_REG,
180 				CSR_HW_IF_CONFIG_REG_MSK_MAC_DASH |
181 				CSR_HW_IF_CONFIG_REG_MSK_MAC_STEP |
182 				CSR_HW_IF_CONFIG_REG_MSK_PHY_TYPE |
183 				CSR_HW_IF_CONFIG_REG_MSK_PHY_STEP |
184 				CSR_HW_IF_CONFIG_REG_MSK_PHY_DASH |
185 				CSR_HW_IF_CONFIG_REG_BIT_RADIO_SI |
186 				CSR_HW_IF_CONFIG_REG_BIT_MAC_SI,
187 				reg_val);
188 
189 	IWL_DEBUG_INFO(mvm, "Radio type=0x%x-0x%x-0x%x\n", radio_cfg_type,
190 		       radio_cfg_step, radio_cfg_dash);
191 
192 	/*
193 	 * W/A : NIC is stuck in a reset state after Early PCIe power off
194 	 * (PCIe power is lost before PERST# is asserted), causing ME FW
195 	 * to lose ownership and not being able to obtain it back.
196 	 */
197 	if (mvm->trans->cfg->device_family != IWL_DEVICE_FAMILY_8000)
198 		iwl_set_bits_mask_prph(mvm->trans, APMG_PS_CTRL_REG,
199 				       APMG_PS_CTRL_EARLY_PWR_OFF_RESET_DIS,
200 				       ~APMG_PS_CTRL_EARLY_PWR_OFF_RESET_DIS);
201 }
202 
203 struct iwl_rx_handlers {
204 	u8 cmd_id;
205 	bool async;
206 	int (*fn)(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb,
207 		  struct iwl_device_cmd *cmd);
208 };
209 
210 #define RX_HANDLER(_cmd_id, _fn, _async)	\
211 	{ .cmd_id = _cmd_id , .fn = _fn , .async = _async }
212 
213 /*
214  * Handlers for fw notifications
215  * Convention: RX_HANDLER(CMD_NAME, iwl_mvm_rx_CMD_NAME
216  * This list should be in order of frequency for performance purposes.
217  *
218  * The handler can be SYNC - this means that it will be called in the Rx path
219  * which can't acquire mvm->mutex. If the handler needs to hold mvm->mutex (and
220  * only in this case!), it should be set as ASYNC. In that case, it will be
221  * called from a worker with mvm->mutex held.
222  */
223 static const struct iwl_rx_handlers iwl_mvm_rx_handlers[] = {
224 	RX_HANDLER(REPLY_RX_MPDU_CMD, iwl_mvm_rx_rx_mpdu, false),
225 	RX_HANDLER(REPLY_RX_PHY_CMD, iwl_mvm_rx_rx_phy_cmd, false),
226 	RX_HANDLER(TX_CMD, iwl_mvm_rx_tx_cmd, false),
227 	RX_HANDLER(BA_NOTIF, iwl_mvm_rx_ba_notif, false),
228 
229 	RX_HANDLER(BT_PROFILE_NOTIFICATION, iwl_mvm_rx_bt_coex_notif, true),
230 	RX_HANDLER(BEACON_NOTIFICATION, iwl_mvm_rx_beacon_notif, true),
231 	RX_HANDLER(STATISTICS_NOTIFICATION, iwl_mvm_rx_statistics, true),
232 	RX_HANDLER(ANTENNA_COUPLING_NOTIFICATION,
233 		   iwl_mvm_rx_ant_coupling_notif, true),
234 
235 	RX_HANDLER(TIME_EVENT_NOTIFICATION, iwl_mvm_rx_time_event_notif, false),
236 	RX_HANDLER(MCC_CHUB_UPDATE_CMD, iwl_mvm_rx_chub_update_mcc, true),
237 
238 	RX_HANDLER(EOSP_NOTIFICATION, iwl_mvm_rx_eosp_notif, false),
239 
240 	RX_HANDLER(SCAN_ITERATION_COMPLETE,
241 		   iwl_mvm_rx_scan_offload_iter_complete_notif, false),
242 	RX_HANDLER(SCAN_OFFLOAD_COMPLETE,
243 		   iwl_mvm_rx_scan_offload_complete_notif, true),
244 	RX_HANDLER(MATCH_FOUND_NOTIFICATION, iwl_mvm_rx_scan_offload_results,
245 		   false),
246 	RX_HANDLER(SCAN_COMPLETE_UMAC, iwl_mvm_rx_umac_scan_complete_notif,
247 		   true),
248 
249 	RX_HANDLER(RADIO_VERSION_NOTIFICATION, iwl_mvm_rx_radio_ver, false),
250 	RX_HANDLER(CARD_STATE_NOTIFICATION, iwl_mvm_rx_card_state_notif, false),
251 
252 	RX_HANDLER(MISSED_BEACONS_NOTIFICATION, iwl_mvm_rx_missed_beacons_notif,
253 		   false),
254 
255 	RX_HANDLER(REPLY_ERROR, iwl_mvm_rx_fw_error, false),
256 	RX_HANDLER(PSM_UAPSD_AP_MISBEHAVING_NOTIFICATION,
257 		   iwl_mvm_power_uapsd_misbehaving_ap_notif, false),
258 	RX_HANDLER(DTS_MEASUREMENT_NOTIFICATION, iwl_mvm_temp_notif, true),
259 
260 	RX_HANDLER(TDLS_CHANNEL_SWITCH_NOTIFICATION, iwl_mvm_rx_tdls_notif,
261 		   true),
262 	RX_HANDLER(MFUART_LOAD_NOTIFICATION, iwl_mvm_rx_mfuart_notif, false),
263 
264 };
265 #undef RX_HANDLER
266 #define CMD(x) [x] = #x
267 
268 static const char *const iwl_mvm_cmd_strings[REPLY_MAX] = {
269 	CMD(MVM_ALIVE),
270 	CMD(REPLY_ERROR),
271 	CMD(INIT_COMPLETE_NOTIF),
272 	CMD(PHY_CONTEXT_CMD),
273 	CMD(MGMT_MCAST_KEY),
274 	CMD(TX_CMD),
275 	CMD(TXPATH_FLUSH),
276 	CMD(SHARED_MEM_CFG),
277 	CMD(MAC_CONTEXT_CMD),
278 	CMD(TIME_EVENT_CMD),
279 	CMD(TIME_EVENT_NOTIFICATION),
280 	CMD(BINDING_CONTEXT_CMD),
281 	CMD(TIME_QUOTA_CMD),
282 	CMD(NON_QOS_TX_COUNTER_CMD),
283 	CMD(RADIO_VERSION_NOTIFICATION),
284 	CMD(SCAN_REQUEST_CMD),
285 	CMD(SCAN_ABORT_CMD),
286 	CMD(SCAN_START_NOTIFICATION),
287 	CMD(SCAN_RESULTS_NOTIFICATION),
288 	CMD(SCAN_COMPLETE_NOTIFICATION),
289 	CMD(NVM_ACCESS_CMD),
290 	CMD(PHY_CONFIGURATION_CMD),
291 	CMD(CALIB_RES_NOTIF_PHY_DB),
292 	CMD(SET_CALIB_DEFAULT_CMD),
293 	CMD(CALIBRATION_COMPLETE_NOTIFICATION),
294 	CMD(ADD_STA_KEY),
295 	CMD(ADD_STA),
296 	CMD(REMOVE_STA),
297 	CMD(LQ_CMD),
298 	CMD(SCAN_OFFLOAD_CONFIG_CMD),
299 	CMD(MATCH_FOUND_NOTIFICATION),
300 	CMD(SCAN_OFFLOAD_REQUEST_CMD),
301 	CMD(SCAN_OFFLOAD_ABORT_CMD),
302 	CMD(HOT_SPOT_CMD),
303 	CMD(SCAN_OFFLOAD_COMPLETE),
304 	CMD(SCAN_OFFLOAD_UPDATE_PROFILES_CMD),
305 	CMD(SCAN_ITERATION_COMPLETE),
306 	CMD(POWER_TABLE_CMD),
307 	CMD(WEP_KEY),
308 	CMD(REPLY_RX_PHY_CMD),
309 	CMD(REPLY_RX_MPDU_CMD),
310 	CMD(BEACON_NOTIFICATION),
311 	CMD(BEACON_TEMPLATE_CMD),
312 	CMD(STATISTICS_CMD),
313 	CMD(STATISTICS_NOTIFICATION),
314 	CMD(EOSP_NOTIFICATION),
315 	CMD(REDUCE_TX_POWER_CMD),
316 	CMD(TX_ANT_CONFIGURATION_CMD),
317 	CMD(D3_CONFIG_CMD),
318 	CMD(D0I3_END_CMD),
319 	CMD(PROT_OFFLOAD_CONFIG_CMD),
320 	CMD(OFFLOADS_QUERY_CMD),
321 	CMD(REMOTE_WAKE_CONFIG_CMD),
322 	CMD(WOWLAN_PATTERNS),
323 	CMD(WOWLAN_CONFIGURATION),
324 	CMD(WOWLAN_TSC_RSC_PARAM),
325 	CMD(WOWLAN_TKIP_PARAM),
326 	CMD(WOWLAN_KEK_KCK_MATERIAL),
327 	CMD(WOWLAN_GET_STATUSES),
328 	CMD(WOWLAN_TX_POWER_PER_DB),
329 	CMD(SCAN_OFFLOAD_PROFILES_QUERY_CMD),
330 	CMD(SCAN_OFFLOAD_HOTSPOTS_CONFIG_CMD),
331 	CMD(SCAN_OFFLOAD_HOTSPOTS_QUERY_CMD),
332 	CMD(CARD_STATE_NOTIFICATION),
333 	CMD(MISSED_BEACONS_NOTIFICATION),
334 	CMD(BT_COEX_PRIO_TABLE),
335 	CMD(BT_COEX_PROT_ENV),
336 	CMD(BT_PROFILE_NOTIFICATION),
337 	CMD(BT_CONFIG),
338 	CMD(MCAST_FILTER_CMD),
339 	CMD(BCAST_FILTER_CMD),
340 	CMD(REPLY_SF_CFG_CMD),
341 	CMD(REPLY_BEACON_FILTERING_CMD),
342 	CMD(CMD_DTS_MEASUREMENT_TRIGGER),
343 	CMD(DTS_MEASUREMENT_NOTIFICATION),
344 	CMD(REPLY_THERMAL_MNG_BACKOFF),
345 	CMD(MAC_PM_POWER_TABLE),
346 	CMD(LTR_CONFIG),
347 	CMD(BT_COEX_CI),
348 	CMD(BT_COEX_UPDATE_SW_BOOST),
349 	CMD(BT_COEX_UPDATE_CORUN_LUT),
350 	CMD(BT_COEX_UPDATE_REDUCED_TXP),
351 	CMD(PSM_UAPSD_AP_MISBEHAVING_NOTIFICATION),
352 	CMD(ANTENNA_COUPLING_NOTIFICATION),
353 	CMD(SCD_QUEUE_CFG),
354 	CMD(SCAN_CFG_CMD),
355 	CMD(SCAN_REQ_UMAC),
356 	CMD(SCAN_ABORT_UMAC),
357 	CMD(SCAN_COMPLETE_UMAC),
358 	CMD(TDLS_CHANNEL_SWITCH_CMD),
359 	CMD(TDLS_CHANNEL_SWITCH_NOTIFICATION),
360 	CMD(TDLS_CONFIG_CMD),
361 	CMD(MCC_UPDATE_CMD),
362 };
363 #undef CMD
364 
365 /* this forward declaration can avoid to export the function */
366 static void iwl_mvm_async_handlers_wk(struct work_struct *wk);
367 static void iwl_mvm_d0i3_exit_work(struct work_struct *wk);
368 
calc_min_backoff(struct iwl_trans * trans,const struct iwl_cfg * cfg)369 static u32 calc_min_backoff(struct iwl_trans *trans, const struct iwl_cfg *cfg)
370 {
371 	const struct iwl_pwr_tx_backoff *pwr_tx_backoff = cfg->pwr_tx_backoffs;
372 
373 	if (!pwr_tx_backoff)
374 		return 0;
375 
376 	while (pwr_tx_backoff->pwr) {
377 		if (trans->dflt_pwr_limit >= pwr_tx_backoff->pwr)
378 			return pwr_tx_backoff->backoff;
379 
380 		pwr_tx_backoff++;
381 	}
382 
383 	return 0;
384 }
385 
386 static void iwl_mvm_fw_error_dump_wk(struct work_struct *work);
387 
388 static struct iwl_op_mode *
iwl_op_mode_mvm_start(struct iwl_trans * trans,const struct iwl_cfg * cfg,const struct iwl_fw * fw,struct dentry * dbgfs_dir)389 iwl_op_mode_mvm_start(struct iwl_trans *trans, const struct iwl_cfg *cfg,
390 		      const struct iwl_fw *fw, struct dentry *dbgfs_dir)
391 {
392 	struct ieee80211_hw *hw;
393 	struct iwl_op_mode *op_mode;
394 	struct iwl_mvm *mvm;
395 	struct iwl_trans_config trans_cfg = {};
396 	static const u8 no_reclaim_cmds[] = {
397 		TX_CMD,
398 	};
399 	int err, scan_size;
400 	u32 min_backoff;
401 
402 	/*
403 	 * We use IWL_MVM_STATION_COUNT to check the validity of the station
404 	 * index all over the driver - check that its value corresponds to the
405 	 * array size.
406 	 */
407 	BUILD_BUG_ON(ARRAY_SIZE(mvm->fw_id_to_mac_id) != IWL_MVM_STATION_COUNT);
408 
409 	/********************************
410 	 * 1. Allocating and configuring HW data
411 	 ********************************/
412 	hw = ieee80211_alloc_hw(sizeof(struct iwl_op_mode) +
413 				sizeof(struct iwl_mvm),
414 				&iwl_mvm_hw_ops);
415 	if (!hw)
416 		return NULL;
417 
418 	if (cfg->max_rx_agg_size)
419 		hw->max_rx_aggregation_subframes = cfg->max_rx_agg_size;
420 
421 	if (cfg->max_tx_agg_size)
422 		hw->max_tx_aggregation_subframes = cfg->max_tx_agg_size;
423 
424 	op_mode = hw->priv;
425 	op_mode->ops = &iwl_mvm_ops;
426 
427 	mvm = IWL_OP_MODE_GET_MVM(op_mode);
428 	mvm->dev = trans->dev;
429 	mvm->trans = trans;
430 	mvm->cfg = cfg;
431 	mvm->fw = fw;
432 	mvm->hw = hw;
433 
434 	mvm->restart_fw = iwlwifi_mod_params.restart_fw ? -1 : 0;
435 
436 	mvm->aux_queue = 15;
437 	mvm->first_agg_queue = 16;
438 	mvm->last_agg_queue = mvm->cfg->base_params->num_of_queues - 1;
439 	if (mvm->cfg->base_params->num_of_queues == 16) {
440 		mvm->aux_queue = 11;
441 		mvm->first_agg_queue = 12;
442 	}
443 	mvm->sf_state = SF_UNINIT;
444 	mvm->low_latency_agg_frame_limit = 6;
445 	mvm->cur_ucode = IWL_UCODE_INIT;
446 
447 	mutex_init(&mvm->mutex);
448 	mutex_init(&mvm->d0i3_suspend_mutex);
449 	spin_lock_init(&mvm->async_handlers_lock);
450 	INIT_LIST_HEAD(&mvm->time_event_list);
451 	INIT_LIST_HEAD(&mvm->aux_roc_te_list);
452 	INIT_LIST_HEAD(&mvm->async_handlers_list);
453 	spin_lock_init(&mvm->time_event_lock);
454 
455 	INIT_WORK(&mvm->async_handlers_wk, iwl_mvm_async_handlers_wk);
456 	INIT_WORK(&mvm->roc_done_wk, iwl_mvm_roc_done_wk);
457 	INIT_WORK(&mvm->sta_drained_wk, iwl_mvm_sta_drained_wk);
458 	INIT_WORK(&mvm->d0i3_exit_work, iwl_mvm_d0i3_exit_work);
459 	INIT_DELAYED_WORK(&mvm->fw_dump_wk, iwl_mvm_fw_error_dump_wk);
460 	INIT_DELAYED_WORK(&mvm->tdls_cs.dwork, iwl_mvm_tdls_ch_switch_work);
461 
462 	spin_lock_init(&mvm->d0i3_tx_lock);
463 	spin_lock_init(&mvm->refs_lock);
464 	skb_queue_head_init(&mvm->d0i3_tx);
465 	init_waitqueue_head(&mvm->d0i3_exit_waitq);
466 
467 	SET_IEEE80211_DEV(mvm->hw, mvm->trans->dev);
468 
469 	/*
470 	 * Populate the state variables that the transport layer needs
471 	 * to know about.
472 	 */
473 	trans_cfg.op_mode = op_mode;
474 	trans_cfg.no_reclaim_cmds = no_reclaim_cmds;
475 	trans_cfg.n_no_reclaim_cmds = ARRAY_SIZE(no_reclaim_cmds);
476 	trans_cfg.rx_buf_size_8k = iwlwifi_mod_params.amsdu_size_8K;
477 
478 	if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_DW_BC_TABLE)
479 		trans_cfg.bc_table_dword = true;
480 
481 	trans_cfg.command_names = iwl_mvm_cmd_strings;
482 
483 	trans_cfg.cmd_queue = IWL_MVM_CMD_QUEUE;
484 	trans_cfg.cmd_fifo = IWL_MVM_TX_FIFO_CMD;
485 	trans_cfg.scd_set_active = true;
486 
487 	trans_cfg.sdio_adma_addr = fw->sdio_adma_addr;
488 
489 	/* Set a short watchdog for the command queue */
490 	trans_cfg.cmd_q_wdg_timeout =
491 		iwl_mvm_get_wd_timeout(mvm, NULL, false, true);
492 
493 	snprintf(mvm->hw->wiphy->fw_version,
494 		 sizeof(mvm->hw->wiphy->fw_version),
495 		 "%s", fw->fw_version);
496 
497 	/* Configure transport layer */
498 	iwl_trans_configure(mvm->trans, &trans_cfg);
499 
500 	trans->rx_mpdu_cmd = REPLY_RX_MPDU_CMD;
501 	trans->rx_mpdu_cmd_hdr_size = sizeof(struct iwl_rx_mpdu_res_start);
502 	trans->dbg_dest_tlv = mvm->fw->dbg_dest_tlv;
503 	trans->dbg_dest_reg_num = mvm->fw->dbg_dest_reg_num;
504 	memcpy(trans->dbg_conf_tlv, mvm->fw->dbg_conf_tlv,
505 	       sizeof(trans->dbg_conf_tlv));
506 	trans->dbg_trigger_tlv = mvm->fw->dbg_trigger_tlv;
507 
508 	/* set up notification wait support */
509 	iwl_notification_wait_init(&mvm->notif_wait);
510 
511 	/* Init phy db */
512 	mvm->phy_db = iwl_phy_db_init(trans);
513 	if (!mvm->phy_db) {
514 		IWL_ERR(mvm, "Cannot init phy_db\n");
515 		goto out_free;
516 	}
517 
518 	IWL_INFO(mvm, "Detected %s, REV=0x%X\n",
519 		 mvm->cfg->name, mvm->trans->hw_rev);
520 
521 	min_backoff = calc_min_backoff(trans, cfg);
522 	iwl_mvm_tt_initialize(mvm, min_backoff);
523 	/* set the nvm_file_name according to priority */
524 	if (iwlwifi_mod_params.nvm_file) {
525 		mvm->nvm_file_name = iwlwifi_mod_params.nvm_file;
526 	} else if (trans->cfg->device_family == IWL_DEVICE_FAMILY_8000) {
527 		if (CSR_HW_REV_STEP(trans->hw_rev) == SILICON_B_STEP)
528 			mvm->nvm_file_name = mvm->cfg->default_nvm_file_B_step;
529 		else
530 			mvm->nvm_file_name = mvm->cfg->default_nvm_file_C_step;
531 	}
532 
533 	if (WARN(cfg->no_power_up_nic_in_init && !mvm->nvm_file_name,
534 		 "not allowing power-up and not having nvm_file\n"))
535 		goto out_free;
536 
537 	/*
538 	 * Even if nvm exists in the nvm_file driver should read again the nvm
539 	 * from the nic because there might be entries that exist in the OTP
540 	 * and not in the file.
541 	 * for nics with no_power_up_nic_in_init: rely completley on nvm_file
542 	 */
543 	if (cfg->no_power_up_nic_in_init && mvm->nvm_file_name) {
544 		err = iwl_nvm_init(mvm, false);
545 		if (err)
546 			goto out_free;
547 	} else {
548 		err = iwl_trans_start_hw(mvm->trans);
549 		if (err)
550 			goto out_free;
551 
552 		mutex_lock(&mvm->mutex);
553 		err = iwl_run_init_mvm_ucode(mvm, true);
554 		if (!err || !iwlmvm_mod_params.init_dbg)
555 			iwl_trans_stop_device(trans);
556 		mutex_unlock(&mvm->mutex);
557 		/* returns 0 if successful, 1 if success but in rfkill */
558 		if (err < 0 && !iwlmvm_mod_params.init_dbg) {
559 			IWL_ERR(mvm, "Failed to run INIT ucode: %d\n", err);
560 			goto out_free;
561 		}
562 	}
563 
564 	scan_size = iwl_mvm_scan_size(mvm);
565 
566 	mvm->scan_cmd = kmalloc(scan_size, GFP_KERNEL);
567 	if (!mvm->scan_cmd)
568 		goto out_free;
569 
570 	/* Set EBS as successful as long as not stated otherwise by the FW. */
571 	mvm->last_ebs_successful = true;
572 
573 	err = iwl_mvm_mac_setup_register(mvm);
574 	if (err)
575 		goto out_free;
576 
577 	err = iwl_mvm_dbgfs_register(mvm, dbgfs_dir);
578 	if (err)
579 		goto out_unregister;
580 
581 	memset(&mvm->rx_stats, 0, sizeof(struct mvm_statistics_rx));
582 
583 	/* rpm starts with a taken ref. only set the appropriate bit here. */
584 	mvm->refs[IWL_MVM_REF_UCODE_DOWN] = 1;
585 
586 	return op_mode;
587 
588  out_unregister:
589 	ieee80211_unregister_hw(mvm->hw);
590 	iwl_mvm_leds_exit(mvm);
591  out_free:
592 	flush_delayed_work(&mvm->fw_dump_wk);
593 	iwl_phy_db_free(mvm->phy_db);
594 	kfree(mvm->scan_cmd);
595 	if (!cfg->no_power_up_nic_in_init || !mvm->nvm_file_name)
596 		iwl_trans_op_mode_leave(trans);
597 	ieee80211_free_hw(mvm->hw);
598 	return NULL;
599 }
600 
iwl_op_mode_mvm_stop(struct iwl_op_mode * op_mode)601 static void iwl_op_mode_mvm_stop(struct iwl_op_mode *op_mode)
602 {
603 	struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
604 	int i;
605 
606 	iwl_mvm_leds_exit(mvm);
607 
608 	iwl_mvm_tt_exit(mvm);
609 
610 	ieee80211_unregister_hw(mvm->hw);
611 
612 	kfree(mvm->scan_cmd);
613 	kfree(mvm->mcast_filter_cmd);
614 	mvm->mcast_filter_cmd = NULL;
615 
616 #if defined(CONFIG_PM_SLEEP) && defined(CONFIG_IWLWIFI_DEBUGFS)
617 	kfree(mvm->d3_resume_sram);
618 	if (mvm->nd_config) {
619 		kfree(mvm->nd_config->match_sets);
620 		kfree(mvm->nd_config);
621 		mvm->nd_config = NULL;
622 	}
623 #endif
624 
625 	iwl_trans_op_mode_leave(mvm->trans);
626 
627 	iwl_phy_db_free(mvm->phy_db);
628 	mvm->phy_db = NULL;
629 
630 	iwl_free_nvm_data(mvm->nvm_data);
631 	for (i = 0; i < NVM_MAX_NUM_SECTIONS; i++)
632 		kfree(mvm->nvm_sections[i].data);
633 
634 	ieee80211_free_hw(mvm->hw);
635 }
636 
637 struct iwl_async_handler_entry {
638 	struct list_head list;
639 	struct iwl_rx_cmd_buffer rxb;
640 	int (*fn)(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb,
641 		  struct iwl_device_cmd *cmd);
642 };
643 
iwl_mvm_async_handlers_purge(struct iwl_mvm * mvm)644 void iwl_mvm_async_handlers_purge(struct iwl_mvm *mvm)
645 {
646 	struct iwl_async_handler_entry *entry, *tmp;
647 
648 	spin_lock_bh(&mvm->async_handlers_lock);
649 	list_for_each_entry_safe(entry, tmp, &mvm->async_handlers_list, list) {
650 		iwl_free_rxb(&entry->rxb);
651 		list_del(&entry->list);
652 		kfree(entry);
653 	}
654 	spin_unlock_bh(&mvm->async_handlers_lock);
655 }
656 
iwl_mvm_async_handlers_wk(struct work_struct * wk)657 static void iwl_mvm_async_handlers_wk(struct work_struct *wk)
658 {
659 	struct iwl_mvm *mvm =
660 		container_of(wk, struct iwl_mvm, async_handlers_wk);
661 	struct iwl_async_handler_entry *entry, *tmp;
662 	struct list_head local_list;
663 
664 	INIT_LIST_HEAD(&local_list);
665 
666 	/* Ensure that we are not in stop flow (check iwl_mvm_mac_stop) */
667 	mutex_lock(&mvm->mutex);
668 
669 	/*
670 	 * Sync with Rx path with a lock. Remove all the entries from this list,
671 	 * add them to a local one (lock free), and then handle them.
672 	 */
673 	spin_lock_bh(&mvm->async_handlers_lock);
674 	list_splice_init(&mvm->async_handlers_list, &local_list);
675 	spin_unlock_bh(&mvm->async_handlers_lock);
676 
677 	list_for_each_entry_safe(entry, tmp, &local_list, list) {
678 		if (entry->fn(mvm, &entry->rxb, NULL))
679 			IWL_WARN(mvm,
680 				 "returned value from ASYNC handlers are ignored\n");
681 		iwl_free_rxb(&entry->rxb);
682 		list_del(&entry->list);
683 		kfree(entry);
684 	}
685 	mutex_unlock(&mvm->mutex);
686 }
687 
iwl_mvm_rx_check_trigger(struct iwl_mvm * mvm,struct iwl_rx_packet * pkt)688 static inline void iwl_mvm_rx_check_trigger(struct iwl_mvm *mvm,
689 					    struct iwl_rx_packet *pkt)
690 {
691 	struct iwl_fw_dbg_trigger_tlv *trig;
692 	struct iwl_fw_dbg_trigger_cmd *cmds_trig;
693 	int i;
694 
695 	if (!iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_FW_NOTIF))
696 		return;
697 
698 	trig = iwl_fw_dbg_get_trigger(mvm->fw, FW_DBG_TRIGGER_FW_NOTIF);
699 	cmds_trig = (void *)trig->data;
700 
701 	if (!iwl_fw_dbg_trigger_check_stop(mvm, NULL, trig))
702 		return;
703 
704 	for (i = 0; i < ARRAY_SIZE(cmds_trig->cmds); i++) {
705 		/* don't collect on CMD 0 */
706 		if (!cmds_trig->cmds[i].cmd_id)
707 			break;
708 
709 		if (cmds_trig->cmds[i].cmd_id != pkt->hdr.cmd)
710 			continue;
711 
712 		iwl_mvm_fw_dbg_collect_trig(mvm, trig,
713 					    "CMD 0x%02x received",
714 					    pkt->hdr.cmd);
715 		break;
716 	}
717 }
718 
iwl_mvm_rx_dispatch(struct iwl_op_mode * op_mode,struct iwl_rx_cmd_buffer * rxb,struct iwl_device_cmd * cmd)719 static int iwl_mvm_rx_dispatch(struct iwl_op_mode *op_mode,
720 			       struct iwl_rx_cmd_buffer *rxb,
721 			       struct iwl_device_cmd *cmd)
722 {
723 	struct iwl_rx_packet *pkt = rxb_addr(rxb);
724 	struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
725 	u8 i;
726 
727 	iwl_mvm_rx_check_trigger(mvm, pkt);
728 
729 	/*
730 	 * Do the notification wait before RX handlers so
731 	 * even if the RX handler consumes the RXB we have
732 	 * access to it in the notification wait entry.
733 	 */
734 	iwl_notification_wait_notify(&mvm->notif_wait, pkt);
735 
736 	for (i = 0; i < ARRAY_SIZE(iwl_mvm_rx_handlers); i++) {
737 		const struct iwl_rx_handlers *rx_h = &iwl_mvm_rx_handlers[i];
738 		struct iwl_async_handler_entry *entry;
739 
740 		if (rx_h->cmd_id != pkt->hdr.cmd)
741 			continue;
742 
743 		if (!rx_h->async)
744 			return rx_h->fn(mvm, rxb, cmd);
745 
746 		entry = kzalloc(sizeof(*entry), GFP_ATOMIC);
747 		/* we can't do much... */
748 		if (!entry)
749 			return 0;
750 
751 		entry->rxb._page = rxb_steal_page(rxb);
752 		entry->rxb._offset = rxb->_offset;
753 		entry->rxb._rx_page_order = rxb->_rx_page_order;
754 		entry->fn = rx_h->fn;
755 		spin_lock(&mvm->async_handlers_lock);
756 		list_add_tail(&entry->list, &mvm->async_handlers_list);
757 		spin_unlock(&mvm->async_handlers_lock);
758 		schedule_work(&mvm->async_handlers_wk);
759 		break;
760 	}
761 
762 	return 0;
763 }
764 
iwl_mvm_stop_sw_queue(struct iwl_op_mode * op_mode,int queue)765 static void iwl_mvm_stop_sw_queue(struct iwl_op_mode *op_mode, int queue)
766 {
767 	struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
768 	int mq = mvm->queue_to_mac80211[queue];
769 
770 	if (WARN_ON_ONCE(mq == IWL_INVALID_MAC80211_QUEUE))
771 		return;
772 
773 	if (atomic_inc_return(&mvm->mac80211_queue_stop_count[mq]) > 1) {
774 		IWL_DEBUG_TX_QUEUES(mvm,
775 				    "queue %d (mac80211 %d) already stopped\n",
776 				    queue, mq);
777 		return;
778 	}
779 
780 	ieee80211_stop_queue(mvm->hw, mq);
781 }
782 
iwl_mvm_wake_sw_queue(struct iwl_op_mode * op_mode,int queue)783 static void iwl_mvm_wake_sw_queue(struct iwl_op_mode *op_mode, int queue)
784 {
785 	struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
786 	int mq = mvm->queue_to_mac80211[queue];
787 
788 	if (WARN_ON_ONCE(mq == IWL_INVALID_MAC80211_QUEUE))
789 		return;
790 
791 	if (atomic_dec_return(&mvm->mac80211_queue_stop_count[mq]) > 0) {
792 		IWL_DEBUG_TX_QUEUES(mvm,
793 				    "queue %d (mac80211 %d) still stopped\n",
794 				    queue, mq);
795 		return;
796 	}
797 
798 	ieee80211_wake_queue(mvm->hw, mq);
799 }
800 
iwl_mvm_set_hw_ctkill_state(struct iwl_mvm * mvm,bool state)801 void iwl_mvm_set_hw_ctkill_state(struct iwl_mvm *mvm, bool state)
802 {
803 	if (state)
804 		set_bit(IWL_MVM_STATUS_HW_CTKILL, &mvm->status);
805 	else
806 		clear_bit(IWL_MVM_STATUS_HW_CTKILL, &mvm->status);
807 
808 	wiphy_rfkill_set_hw_state(mvm->hw->wiphy, iwl_mvm_is_radio_killed(mvm));
809 }
810 
iwl_mvm_set_hw_rfkill_state(struct iwl_op_mode * op_mode,bool state)811 static bool iwl_mvm_set_hw_rfkill_state(struct iwl_op_mode *op_mode, bool state)
812 {
813 	struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
814 	bool calibrating = ACCESS_ONCE(mvm->calibrating);
815 
816 	if (state)
817 		set_bit(IWL_MVM_STATUS_HW_RFKILL, &mvm->status);
818 	else
819 		clear_bit(IWL_MVM_STATUS_HW_RFKILL, &mvm->status);
820 
821 	wiphy_rfkill_set_hw_state(mvm->hw->wiphy, iwl_mvm_is_radio_killed(mvm));
822 
823 	/* iwl_run_init_mvm_ucode is waiting for results, abort it */
824 	if (calibrating)
825 		iwl_abort_notification_waits(&mvm->notif_wait);
826 
827 	/*
828 	 * Stop the device if we run OPERATIONAL firmware or if we are in the
829 	 * middle of the calibrations.
830 	 */
831 	return state && (mvm->cur_ucode != IWL_UCODE_INIT || calibrating);
832 }
833 
iwl_mvm_free_skb(struct iwl_op_mode * op_mode,struct sk_buff * skb)834 static void iwl_mvm_free_skb(struct iwl_op_mode *op_mode, struct sk_buff *skb)
835 {
836 	struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
837 	struct ieee80211_tx_info *info;
838 
839 	info = IEEE80211_SKB_CB(skb);
840 	iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]);
841 	ieee80211_free_txskb(mvm->hw, skb);
842 }
843 
844 struct iwl_mvm_reprobe {
845 	struct device *dev;
846 	struct work_struct work;
847 };
848 
iwl_mvm_reprobe_wk(struct work_struct * wk)849 static void iwl_mvm_reprobe_wk(struct work_struct *wk)
850 {
851 	struct iwl_mvm_reprobe *reprobe;
852 
853 	reprobe = container_of(wk, struct iwl_mvm_reprobe, work);
854 	if (device_reprobe(reprobe->dev))
855 		dev_err(reprobe->dev, "reprobe failed!\n");
856 	kfree(reprobe);
857 	module_put(THIS_MODULE);
858 }
859 
iwl_mvm_fw_error_dump_wk(struct work_struct * work)860 static void iwl_mvm_fw_error_dump_wk(struct work_struct *work)
861 {
862 	struct iwl_mvm *mvm =
863 		container_of(work, struct iwl_mvm, fw_dump_wk.work);
864 
865 	if (iwl_mvm_ref_sync(mvm, IWL_MVM_REF_FW_DBG_COLLECT))
866 		return;
867 
868 	mutex_lock(&mvm->mutex);
869 
870 	/* stop recording */
871 	if (mvm->cfg->device_family == IWL_DEVICE_FAMILY_7000) {
872 		iwl_set_bits_prph(mvm->trans, MON_BUFF_SAMPLE_CTL, 0x100);
873 	} else {
874 		iwl_write_prph(mvm->trans, DBGC_IN_SAMPLE, 0);
875 		/* wait before we collect the data till the DBGC stop */
876 		udelay(100);
877 	}
878 
879 	iwl_mvm_fw_error_dump(mvm);
880 
881 	/* start recording again if the firmware is not crashed */
882 	WARN_ON_ONCE((!test_bit(STATUS_FW_ERROR, &mvm->trans->status)) &&
883 		     mvm->fw->dbg_dest_tlv &&
884 		     iwl_mvm_start_fw_dbg_conf(mvm, mvm->fw_dbg_conf));
885 
886 	mutex_unlock(&mvm->mutex);
887 
888 	iwl_mvm_unref(mvm, IWL_MVM_REF_FW_DBG_COLLECT);
889 }
890 
iwl_mvm_nic_restart(struct iwl_mvm * mvm,bool fw_error)891 void iwl_mvm_nic_restart(struct iwl_mvm *mvm, bool fw_error)
892 {
893 	iwl_abort_notification_waits(&mvm->notif_wait);
894 
895 	/*
896 	 * This is a bit racy, but worst case we tell mac80211 about
897 	 * a stopped/aborted scan when that was already done which
898 	 * is not a problem. It is necessary to abort any os scan
899 	 * here because mac80211 requires having the scan cleared
900 	 * before restarting.
901 	 * We'll reset the scan_status to NONE in restart cleanup in
902 	 * the next start() call from mac80211. If restart isn't called
903 	 * (no fw restart) scan status will stay busy.
904 	 */
905 	iwl_mvm_report_scan_aborted(mvm);
906 
907 	/*
908 	 * If we're restarting already, don't cycle restarts.
909 	 * If INIT fw asserted, it will likely fail again.
910 	 * If WoWLAN fw asserted, don't restart either, mac80211
911 	 * can't recover this since we're already half suspended.
912 	 */
913 	if (!mvm->restart_fw && fw_error) {
914 		iwl_mvm_fw_dbg_collect_desc(mvm, &iwl_mvm_dump_desc_assert, 0);
915 	} else if (test_and_set_bit(IWL_MVM_STATUS_IN_HW_RESTART,
916 				    &mvm->status)) {
917 		struct iwl_mvm_reprobe *reprobe;
918 
919 		IWL_ERR(mvm,
920 			"Firmware error during reconfiguration - reprobe!\n");
921 
922 		/*
923 		 * get a module reference to avoid doing this while unloading
924 		 * anyway and to avoid scheduling a work with code that's
925 		 * being removed.
926 		 */
927 		if (!try_module_get(THIS_MODULE)) {
928 			IWL_ERR(mvm, "Module is being unloaded - abort\n");
929 			return;
930 		}
931 
932 		reprobe = kzalloc(sizeof(*reprobe), GFP_ATOMIC);
933 		if (!reprobe) {
934 			module_put(THIS_MODULE);
935 			return;
936 		}
937 		reprobe->dev = mvm->trans->dev;
938 		INIT_WORK(&reprobe->work, iwl_mvm_reprobe_wk);
939 		schedule_work(&reprobe->work);
940 	} else if (mvm->cur_ucode == IWL_UCODE_REGULAR) {
941 		/* don't let the transport/FW power down */
942 		iwl_mvm_ref(mvm, IWL_MVM_REF_UCODE_DOWN);
943 
944 		if (fw_error && mvm->restart_fw > 0)
945 			mvm->restart_fw--;
946 		ieee80211_restart_hw(mvm->hw);
947 	}
948 }
949 
iwl_mvm_nic_error(struct iwl_op_mode * op_mode)950 static void iwl_mvm_nic_error(struct iwl_op_mode *op_mode)
951 {
952 	struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
953 
954 	iwl_mvm_dump_nic_error_log(mvm);
955 
956 	iwl_mvm_nic_restart(mvm, true);
957 }
958 
iwl_mvm_cmd_queue_full(struct iwl_op_mode * op_mode)959 static void iwl_mvm_cmd_queue_full(struct iwl_op_mode *op_mode)
960 {
961 	struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
962 
963 	WARN_ON(1);
964 	iwl_mvm_nic_restart(mvm, true);
965 }
966 
967 struct iwl_d0i3_iter_data {
968 	struct iwl_mvm *mvm;
969 	u8 ap_sta_id;
970 	u8 vif_count;
971 	u8 offloading_tid;
972 	bool disable_offloading;
973 };
974 
iwl_mvm_disallow_offloading(struct iwl_mvm * mvm,struct ieee80211_vif * vif,struct iwl_d0i3_iter_data * iter_data)975 static bool iwl_mvm_disallow_offloading(struct iwl_mvm *mvm,
976 					struct ieee80211_vif *vif,
977 					struct iwl_d0i3_iter_data *iter_data)
978 {
979 	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
980 	struct ieee80211_sta *ap_sta;
981 	struct iwl_mvm_sta *mvmsta;
982 	u32 available_tids = 0;
983 	u8 tid;
984 
985 	if (WARN_ON(vif->type != NL80211_IFTYPE_STATION ||
986 		    mvmvif->ap_sta_id == IWL_MVM_STATION_COUNT))
987 		return false;
988 
989 	ap_sta = rcu_dereference(mvm->fw_id_to_mac_id[mvmvif->ap_sta_id]);
990 	if (IS_ERR_OR_NULL(ap_sta))
991 		return false;
992 
993 	mvmsta = iwl_mvm_sta_from_mac80211(ap_sta);
994 	spin_lock_bh(&mvmsta->lock);
995 	for (tid = 0; tid < IWL_MAX_TID_COUNT; tid++) {
996 		struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
997 
998 		/*
999 		 * in case of pending tx packets, don't use this tid
1000 		 * for offloading in order to prevent reuse of the same
1001 		 * qos seq counters.
1002 		 */
1003 		if (iwl_mvm_tid_queued(tid_data))
1004 			continue;
1005 
1006 		if (tid_data->state != IWL_AGG_OFF)
1007 			continue;
1008 
1009 		available_tids |= BIT(tid);
1010 	}
1011 	spin_unlock_bh(&mvmsta->lock);
1012 
1013 	/*
1014 	 * disallow protocol offloading if we have no available tid
1015 	 * (with no pending frames and no active aggregation,
1016 	 * as we don't handle "holes" properly - the scheduler needs the
1017 	 * frame's seq number and TFD index to match)
1018 	 */
1019 	if (!available_tids)
1020 		return true;
1021 
1022 	/* for simplicity, just use the first available tid */
1023 	iter_data->offloading_tid = ffs(available_tids) - 1;
1024 	return false;
1025 }
1026 
iwl_mvm_enter_d0i3_iterator(void * _data,u8 * mac,struct ieee80211_vif * vif)1027 static void iwl_mvm_enter_d0i3_iterator(void *_data, u8 *mac,
1028 					struct ieee80211_vif *vif)
1029 {
1030 	struct iwl_d0i3_iter_data *data = _data;
1031 	struct iwl_mvm *mvm = data->mvm;
1032 	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1033 	u32 flags = CMD_ASYNC | CMD_HIGH_PRIO | CMD_SEND_IN_IDLE;
1034 
1035 	IWL_DEBUG_RPM(mvm, "entering D0i3 - vif %pM\n", vif->addr);
1036 	if (vif->type != NL80211_IFTYPE_STATION ||
1037 	    !vif->bss_conf.assoc)
1038 		return;
1039 
1040 	/*
1041 	 * in case of pending tx packets or active aggregations,
1042 	 * avoid offloading features in order to prevent reuse of
1043 	 * the same qos seq counters.
1044 	 */
1045 	if (iwl_mvm_disallow_offloading(mvm, vif, data))
1046 		data->disable_offloading = true;
1047 
1048 	iwl_mvm_update_d0i3_power_mode(mvm, vif, true, flags);
1049 	iwl_mvm_send_proto_offload(mvm, vif, data->disable_offloading, flags);
1050 
1051 	/*
1052 	 * on init/association, mvm already configures POWER_TABLE_CMD
1053 	 * and REPLY_MCAST_FILTER_CMD, so currently don't
1054 	 * reconfigure them (we might want to use different
1055 	 * params later on, though).
1056 	 */
1057 	data->ap_sta_id = mvmvif->ap_sta_id;
1058 	data->vif_count++;
1059 }
1060 
iwl_mvm_set_wowlan_data(struct iwl_mvm * mvm,struct iwl_wowlan_config_cmd * cmd,struct iwl_d0i3_iter_data * iter_data)1061 static void iwl_mvm_set_wowlan_data(struct iwl_mvm *mvm,
1062 				    struct iwl_wowlan_config_cmd *cmd,
1063 				    struct iwl_d0i3_iter_data *iter_data)
1064 {
1065 	struct ieee80211_sta *ap_sta;
1066 	struct iwl_mvm_sta *mvm_ap_sta;
1067 
1068 	if (iter_data->ap_sta_id == IWL_MVM_STATION_COUNT)
1069 		return;
1070 
1071 	rcu_read_lock();
1072 
1073 	ap_sta = rcu_dereference(mvm->fw_id_to_mac_id[iter_data->ap_sta_id]);
1074 	if (IS_ERR_OR_NULL(ap_sta))
1075 		goto out;
1076 
1077 	mvm_ap_sta = iwl_mvm_sta_from_mac80211(ap_sta);
1078 	cmd->is_11n_connection = ap_sta->ht_cap.ht_supported;
1079 	cmd->offloading_tid = iter_data->offloading_tid;
1080 
1081 	/*
1082 	 * The d0i3 uCode takes care of the nonqos counters,
1083 	 * so configure only the qos seq ones.
1084 	 */
1085 	iwl_mvm_set_wowlan_qos_seq(mvm_ap_sta, cmd);
1086 out:
1087 	rcu_read_unlock();
1088 }
1089 
iwl_mvm_enter_d0i3(struct iwl_op_mode * op_mode)1090 int iwl_mvm_enter_d0i3(struct iwl_op_mode *op_mode)
1091 {
1092 	struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
1093 	u32 flags = CMD_ASYNC | CMD_HIGH_PRIO | CMD_SEND_IN_IDLE;
1094 	int ret;
1095 	struct iwl_d0i3_iter_data d0i3_iter_data = {
1096 		.mvm = mvm,
1097 	};
1098 	struct iwl_wowlan_config_cmd wowlan_config_cmd = {
1099 		.wakeup_filter = cpu_to_le32(IWL_WOWLAN_WAKEUP_RX_FRAME |
1100 					     IWL_WOWLAN_WAKEUP_BEACON_MISS |
1101 					     IWL_WOWLAN_WAKEUP_LINK_CHANGE |
1102 					     IWL_WOWLAN_WAKEUP_BCN_FILTERING),
1103 	};
1104 	struct iwl_d3_manager_config d3_cfg_cmd = {
1105 		.min_sleep_time = cpu_to_le32(1000),
1106 		.wakeup_flags = cpu_to_le32(IWL_WAKEUP_D3_CONFIG_FW_ERROR),
1107 	};
1108 
1109 	IWL_DEBUG_RPM(mvm, "MVM entering D0i3\n");
1110 
1111 	/* make sure we have no running tx while configuring the qos */
1112 	set_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status);
1113 	synchronize_net();
1114 
1115 	/*
1116 	 * iwl_mvm_ref_sync takes a reference before checking the flag.
1117 	 * so by checking there is no held reference we prevent a state
1118 	 * in which iwl_mvm_ref_sync continues successfully while we
1119 	 * configure the firmware to enter d0i3
1120 	 */
1121 	if (iwl_mvm_ref_taken(mvm)) {
1122 		IWL_DEBUG_RPM(mvm->trans, "abort d0i3 due to taken ref\n");
1123 		clear_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status);
1124 		wake_up(&mvm->d0i3_exit_waitq);
1125 		return 1;
1126 	}
1127 
1128 	ieee80211_iterate_active_interfaces_atomic(mvm->hw,
1129 						   IEEE80211_IFACE_ITER_NORMAL,
1130 						   iwl_mvm_enter_d0i3_iterator,
1131 						   &d0i3_iter_data);
1132 	if (d0i3_iter_data.vif_count == 1) {
1133 		mvm->d0i3_ap_sta_id = d0i3_iter_data.ap_sta_id;
1134 		mvm->d0i3_offloading = !d0i3_iter_data.disable_offloading;
1135 	} else {
1136 		WARN_ON_ONCE(d0i3_iter_data.vif_count > 1);
1137 		mvm->d0i3_ap_sta_id = IWL_MVM_STATION_COUNT;
1138 		mvm->d0i3_offloading = false;
1139 	}
1140 
1141 	iwl_mvm_set_wowlan_data(mvm, &wowlan_config_cmd, &d0i3_iter_data);
1142 	ret = iwl_mvm_send_cmd_pdu(mvm, WOWLAN_CONFIGURATION, flags,
1143 				   sizeof(wowlan_config_cmd),
1144 				   &wowlan_config_cmd);
1145 	if (ret)
1146 		return ret;
1147 
1148 	return iwl_mvm_send_cmd_pdu(mvm, D3_CONFIG_CMD,
1149 				    flags | CMD_MAKE_TRANS_IDLE,
1150 				    sizeof(d3_cfg_cmd), &d3_cfg_cmd);
1151 }
1152 
iwl_mvm_exit_d0i3_iterator(void * _data,u8 * mac,struct ieee80211_vif * vif)1153 static void iwl_mvm_exit_d0i3_iterator(void *_data, u8 *mac,
1154 				       struct ieee80211_vif *vif)
1155 {
1156 	struct iwl_mvm *mvm = _data;
1157 	u32 flags = CMD_ASYNC | CMD_HIGH_PRIO;
1158 
1159 	IWL_DEBUG_RPM(mvm, "exiting D0i3 - vif %pM\n", vif->addr);
1160 	if (vif->type != NL80211_IFTYPE_STATION ||
1161 	    !vif->bss_conf.assoc)
1162 		return;
1163 
1164 	iwl_mvm_update_d0i3_power_mode(mvm, vif, false, flags);
1165 }
1166 
iwl_mvm_d0i3_disconnect_iter(void * data,u8 * mac,struct ieee80211_vif * vif)1167 static void iwl_mvm_d0i3_disconnect_iter(void *data, u8 *mac,
1168 					 struct ieee80211_vif *vif)
1169 {
1170 	struct iwl_mvm *mvm = data;
1171 	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1172 
1173 	if (vif->type == NL80211_IFTYPE_STATION && vif->bss_conf.assoc &&
1174 	    mvm->d0i3_ap_sta_id == mvmvif->ap_sta_id)
1175 		iwl_mvm_connection_loss(mvm, vif, "D0i3");
1176 }
1177 
iwl_mvm_d0i3_enable_tx(struct iwl_mvm * mvm,__le16 * qos_seq)1178 void iwl_mvm_d0i3_enable_tx(struct iwl_mvm *mvm, __le16 *qos_seq)
1179 {
1180 	struct ieee80211_sta *sta = NULL;
1181 	struct iwl_mvm_sta *mvm_ap_sta;
1182 	int i;
1183 	bool wake_queues = false;
1184 
1185 	lockdep_assert_held(&mvm->mutex);
1186 
1187 	spin_lock_bh(&mvm->d0i3_tx_lock);
1188 
1189 	if (mvm->d0i3_ap_sta_id == IWL_MVM_STATION_COUNT)
1190 		goto out;
1191 
1192 	IWL_DEBUG_RPM(mvm, "re-enqueue packets\n");
1193 
1194 	/* get the sta in order to update seq numbers and re-enqueue skbs */
1195 	sta = rcu_dereference_protected(
1196 			mvm->fw_id_to_mac_id[mvm->d0i3_ap_sta_id],
1197 			lockdep_is_held(&mvm->mutex));
1198 
1199 	if (IS_ERR_OR_NULL(sta)) {
1200 		sta = NULL;
1201 		goto out;
1202 	}
1203 
1204 	if (mvm->d0i3_offloading && qos_seq) {
1205 		/* update qos seq numbers if offloading was enabled */
1206 		mvm_ap_sta = iwl_mvm_sta_from_mac80211(sta);
1207 		for (i = 0; i < IWL_MAX_TID_COUNT; i++) {
1208 			u16 seq = le16_to_cpu(qos_seq[i]);
1209 			/* firmware stores last-used one, we store next one */
1210 			seq += 0x10;
1211 			mvm_ap_sta->tid_data[i].seq_number = seq;
1212 		}
1213 	}
1214 out:
1215 	/* re-enqueue (or drop) all packets */
1216 	while (!skb_queue_empty(&mvm->d0i3_tx)) {
1217 		struct sk_buff *skb = __skb_dequeue(&mvm->d0i3_tx);
1218 
1219 		if (!sta || iwl_mvm_tx_skb(mvm, skb, sta))
1220 			ieee80211_free_txskb(mvm->hw, skb);
1221 
1222 		/* if the skb_queue is not empty, we need to wake queues */
1223 		wake_queues = true;
1224 	}
1225 	clear_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status);
1226 	wake_up(&mvm->d0i3_exit_waitq);
1227 	mvm->d0i3_ap_sta_id = IWL_MVM_STATION_COUNT;
1228 	if (wake_queues)
1229 		ieee80211_wake_queues(mvm->hw);
1230 
1231 	spin_unlock_bh(&mvm->d0i3_tx_lock);
1232 }
1233 
iwl_mvm_d0i3_exit_work(struct work_struct * wk)1234 static void iwl_mvm_d0i3_exit_work(struct work_struct *wk)
1235 {
1236 	struct iwl_mvm *mvm = container_of(wk, struct iwl_mvm, d0i3_exit_work);
1237 	struct iwl_host_cmd get_status_cmd = {
1238 		.id = WOWLAN_GET_STATUSES,
1239 		.flags = CMD_HIGH_PRIO | CMD_WANT_SKB,
1240 	};
1241 	struct iwl_wowlan_status *status;
1242 	int ret;
1243 	u32 disconnection_reasons, wakeup_reasons;
1244 	__le16 *qos_seq = NULL;
1245 
1246 	mutex_lock(&mvm->mutex);
1247 	ret = iwl_mvm_send_cmd(mvm, &get_status_cmd);
1248 	if (ret)
1249 		goto out;
1250 
1251 	if (!get_status_cmd.resp_pkt)
1252 		goto out;
1253 
1254 	status = (void *)get_status_cmd.resp_pkt->data;
1255 	wakeup_reasons = le32_to_cpu(status->wakeup_reasons);
1256 	qos_seq = status->qos_seq_ctr;
1257 
1258 	IWL_DEBUG_RPM(mvm, "wakeup reasons: 0x%x\n", wakeup_reasons);
1259 
1260 	disconnection_reasons =
1261 		IWL_WOWLAN_WAKEUP_BY_DISCONNECTION_ON_MISSED_BEACON |
1262 		IWL_WOWLAN_WAKEUP_BY_DISCONNECTION_ON_DEAUTH;
1263 	if (wakeup_reasons & disconnection_reasons)
1264 		ieee80211_iterate_active_interfaces(
1265 			mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
1266 			iwl_mvm_d0i3_disconnect_iter, mvm);
1267 out:
1268 	iwl_mvm_d0i3_enable_tx(mvm, qos_seq);
1269 
1270 	/* qos_seq might point inside resp_pkt, so free it only now */
1271 	if (get_status_cmd.resp_pkt)
1272 		iwl_free_resp(&get_status_cmd);
1273 
1274 	/* the FW might have updated the regdomain */
1275 	iwl_mvm_update_changed_regdom(mvm);
1276 
1277 	iwl_mvm_unref(mvm, IWL_MVM_REF_EXIT_WORK);
1278 	mutex_unlock(&mvm->mutex);
1279 }
1280 
_iwl_mvm_exit_d0i3(struct iwl_mvm * mvm)1281 int _iwl_mvm_exit_d0i3(struct iwl_mvm *mvm)
1282 {
1283 	u32 flags = CMD_ASYNC | CMD_HIGH_PRIO | CMD_SEND_IN_IDLE |
1284 		    CMD_WAKE_UP_TRANS;
1285 	int ret;
1286 
1287 	IWL_DEBUG_RPM(mvm, "MVM exiting D0i3\n");
1288 
1289 	mutex_lock(&mvm->d0i3_suspend_mutex);
1290 	if (test_bit(D0I3_DEFER_WAKEUP, &mvm->d0i3_suspend_flags)) {
1291 		IWL_DEBUG_RPM(mvm, "Deferring d0i3 exit until resume\n");
1292 		__set_bit(D0I3_PENDING_WAKEUP, &mvm->d0i3_suspend_flags);
1293 		mutex_unlock(&mvm->d0i3_suspend_mutex);
1294 		return 0;
1295 	}
1296 	mutex_unlock(&mvm->d0i3_suspend_mutex);
1297 
1298 	ret = iwl_mvm_send_cmd_pdu(mvm, D0I3_END_CMD, flags, 0, NULL);
1299 	if (ret)
1300 		goto out;
1301 
1302 	ieee80211_iterate_active_interfaces_atomic(mvm->hw,
1303 						   IEEE80211_IFACE_ITER_NORMAL,
1304 						   iwl_mvm_exit_d0i3_iterator,
1305 						   mvm);
1306 out:
1307 	schedule_work(&mvm->d0i3_exit_work);
1308 	return ret;
1309 }
1310 
iwl_mvm_exit_d0i3(struct iwl_op_mode * op_mode)1311 int iwl_mvm_exit_d0i3(struct iwl_op_mode *op_mode)
1312 {
1313 	struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
1314 
1315 	iwl_mvm_ref(mvm, IWL_MVM_REF_EXIT_WORK);
1316 	return _iwl_mvm_exit_d0i3(mvm);
1317 }
1318 
iwl_mvm_napi_add(struct iwl_op_mode * op_mode,struct napi_struct * napi,struct net_device * napi_dev,int (* poll)(struct napi_struct *,int),int weight)1319 static void iwl_mvm_napi_add(struct iwl_op_mode *op_mode,
1320 			     struct napi_struct *napi,
1321 			     struct net_device *napi_dev,
1322 			     int (*poll)(struct napi_struct *, int),
1323 			     int weight)
1324 {
1325 	struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
1326 
1327 	ieee80211_napi_add(mvm->hw, napi, napi_dev, poll, weight);
1328 }
1329 
1330 static const struct iwl_op_mode_ops iwl_mvm_ops = {
1331 	.start = iwl_op_mode_mvm_start,
1332 	.stop = iwl_op_mode_mvm_stop,
1333 	.rx = iwl_mvm_rx_dispatch,
1334 	.queue_full = iwl_mvm_stop_sw_queue,
1335 	.queue_not_full = iwl_mvm_wake_sw_queue,
1336 	.hw_rf_kill = iwl_mvm_set_hw_rfkill_state,
1337 	.free_skb = iwl_mvm_free_skb,
1338 	.nic_error = iwl_mvm_nic_error,
1339 	.cmd_queue_full = iwl_mvm_cmd_queue_full,
1340 	.nic_config = iwl_mvm_nic_config,
1341 	.enter_d0i3 = iwl_mvm_enter_d0i3,
1342 	.exit_d0i3 = iwl_mvm_exit_d0i3,
1343 	.napi_add = iwl_mvm_napi_add,
1344 };
1345