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Merge remote-tracking branches 'regulator/topic/load', 'regulator/topic/max77802...
[deliverable/linux.git] / drivers / net / wireless / iwlwifi / mvm / ops.c
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 - 2015 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 - 2015 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 */
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
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
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->apmg_not_supported)
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 u16 cmd_id;
205 bool async;
206 void (*fn)(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb);
207 };
208
209 #define RX_HANDLER(_cmd_id, _fn, _async) \
210 { .cmd_id = _cmd_id , .fn = _fn , .async = _async }
211 #define RX_HANDLER_GRP(_grp, _cmd, _fn, _async) \
212 { .cmd_id = WIDE_ID(_grp, _cmd), .fn = _fn, .async = _async }
213
214 /*
215 * Handlers for fw notifications
216 * Convention: RX_HANDLER(CMD_NAME, iwl_mvm_rx_CMD_NAME
217 * This list should be in order of frequency for performance purposes.
218 *
219 * The handler can be SYNC - this means that it will be called in the Rx path
220 * which can't acquire mvm->mutex. If the handler needs to hold mvm->mutex (and
221 * only in this case!), it should be set as ASYNC. In that case, it will be
222 * called from a worker with mvm->mutex held.
223 */
224 static const struct iwl_rx_handlers iwl_mvm_rx_handlers[] = {
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_lmac_scan_iter_complete_notif, false),
242 RX_HANDLER(SCAN_OFFLOAD_COMPLETE,
243 iwl_mvm_rx_lmac_scan_complete_notif, true),
244 RX_HANDLER(MATCH_FOUND_NOTIFICATION, iwl_mvm_rx_scan_match_found,
245 false),
246 RX_HANDLER(SCAN_COMPLETE_UMAC, iwl_mvm_rx_umac_scan_complete_notif,
247 true),
248 RX_HANDLER(SCAN_ITERATION_COMPLETE_UMAC,
249 iwl_mvm_rx_umac_scan_iter_complete_notif, false),
250
251 RX_HANDLER(CARD_STATE_NOTIFICATION, iwl_mvm_rx_card_state_notif, false),
252
253 RX_HANDLER(MISSED_BEACONS_NOTIFICATION, iwl_mvm_rx_missed_beacons_notif,
254 false),
255
256 RX_HANDLER(REPLY_ERROR, iwl_mvm_rx_fw_error, false),
257 RX_HANDLER(PSM_UAPSD_AP_MISBEHAVING_NOTIFICATION,
258 iwl_mvm_power_uapsd_misbehaving_ap_notif, false),
259 RX_HANDLER(DTS_MEASUREMENT_NOTIFICATION, iwl_mvm_temp_notif, true),
260
261 RX_HANDLER(TDLS_CHANNEL_SWITCH_NOTIFICATION, iwl_mvm_rx_tdls_notif,
262 true),
263 RX_HANDLER(MFUART_LOAD_NOTIFICATION, iwl_mvm_rx_mfuart_notif, false),
264 RX_HANDLER(TOF_NOTIFICATION, iwl_mvm_tof_resp_handler, true),
265
266 };
267 #undef RX_HANDLER
268 #undef RX_HANDLER_GRP
269 #define CMD(x) [x] = #x
270
271 static const char *const iwl_mvm_cmd_strings[REPLY_MAX + 1] = {
272 CMD(MVM_ALIVE),
273 CMD(REPLY_ERROR),
274 CMD(INIT_COMPLETE_NOTIF),
275 CMD(PHY_CONTEXT_CMD),
276 CMD(MGMT_MCAST_KEY),
277 CMD(TX_CMD),
278 CMD(TXPATH_FLUSH),
279 CMD(SHARED_MEM_CFG),
280 CMD(MAC_CONTEXT_CMD),
281 CMD(TIME_EVENT_CMD),
282 CMD(TIME_EVENT_NOTIFICATION),
283 CMD(BINDING_CONTEXT_CMD),
284 CMD(TIME_QUOTA_CMD),
285 CMD(NON_QOS_TX_COUNTER_CMD),
286 CMD(DC2DC_CONFIG_CMD),
287 CMD(NVM_ACCESS_CMD),
288 CMD(PHY_CONFIGURATION_CMD),
289 CMD(CALIB_RES_NOTIF_PHY_DB),
290 CMD(SET_CALIB_DEFAULT_CMD),
291 CMD(FW_PAGING_BLOCK_CMD),
292 CMD(ADD_STA_KEY),
293 CMD(ADD_STA),
294 CMD(FW_GET_ITEM_CMD),
295 CMD(REMOVE_STA),
296 CMD(LQ_CMD),
297 CMD(SCAN_OFFLOAD_CONFIG_CMD),
298 CMD(MATCH_FOUND_NOTIFICATION),
299 CMD(SCAN_OFFLOAD_REQUEST_CMD),
300 CMD(SCAN_OFFLOAD_ABORT_CMD),
301 CMD(HOT_SPOT_CMD),
302 CMD(SCAN_OFFLOAD_COMPLETE),
303 CMD(SCAN_OFFLOAD_UPDATE_PROFILES_CMD),
304 CMD(SCAN_ITERATION_COMPLETE),
305 CMD(POWER_TABLE_CMD),
306 CMD(WEP_KEY),
307 CMD(REPLY_RX_PHY_CMD),
308 CMD(REPLY_RX_MPDU_CMD),
309 CMD(BEACON_NOTIFICATION),
310 CMD(BEACON_TEMPLATE_CMD),
311 CMD(STATISTICS_CMD),
312 CMD(STATISTICS_NOTIFICATION),
313 CMD(EOSP_NOTIFICATION),
314 CMD(REDUCE_TX_POWER_CMD),
315 CMD(TX_ANT_CONFIGURATION_CMD),
316 CMD(D3_CONFIG_CMD),
317 CMD(D0I3_END_CMD),
318 CMD(PROT_OFFLOAD_CONFIG_CMD),
319 CMD(OFFLOADS_QUERY_CMD),
320 CMD(REMOTE_WAKE_CONFIG_CMD),
321 CMD(WOWLAN_PATTERNS),
322 CMD(WOWLAN_CONFIGURATION),
323 CMD(WOWLAN_TSC_RSC_PARAM),
324 CMD(WOWLAN_TKIP_PARAM),
325 CMD(WOWLAN_KEK_KCK_MATERIAL),
326 CMD(WOWLAN_GET_STATUSES),
327 CMD(WOWLAN_TX_POWER_PER_DB),
328 CMD(SCAN_OFFLOAD_PROFILES_QUERY_CMD),
329 CMD(SCAN_OFFLOAD_HOTSPOTS_CONFIG_CMD),
330 CMD(SCAN_OFFLOAD_HOTSPOTS_QUERY_CMD),
331 CMD(CARD_STATE_NOTIFICATION),
332 CMD(MISSED_BEACONS_NOTIFICATION),
333 CMD(BT_COEX_PRIO_TABLE),
334 CMD(BT_COEX_PROT_ENV),
335 CMD(BT_PROFILE_NOTIFICATION),
336 CMD(BT_CONFIG),
337 CMD(MCAST_FILTER_CMD),
338 CMD(BCAST_FILTER_CMD),
339 CMD(REPLY_SF_CFG_CMD),
340 CMD(REPLY_BEACON_FILTERING_CMD),
341 CMD(CMD_DTS_MEASUREMENT_TRIGGER),
342 CMD(DTS_MEASUREMENT_NOTIFICATION),
343 CMD(REPLY_THERMAL_MNG_BACKOFF),
344 CMD(MAC_PM_POWER_TABLE),
345 CMD(LTR_CONFIG),
346 CMD(BT_COEX_CI),
347 CMD(BT_COEX_UPDATE_SW_BOOST),
348 CMD(BT_COEX_UPDATE_CORUN_LUT),
349 CMD(BT_COEX_UPDATE_REDUCED_TXP),
350 CMD(PSM_UAPSD_AP_MISBEHAVING_NOTIFICATION),
351 CMD(ANTENNA_COUPLING_NOTIFICATION),
352 CMD(SCD_QUEUE_CFG),
353 CMD(SCAN_CFG_CMD),
354 CMD(SCAN_REQ_UMAC),
355 CMD(SCAN_ABORT_UMAC),
356 CMD(SCAN_COMPLETE_UMAC),
357 CMD(TDLS_CHANNEL_SWITCH_CMD),
358 CMD(TDLS_CHANNEL_SWITCH_NOTIFICATION),
359 CMD(TDLS_CONFIG_CMD),
360 CMD(MCC_UPDATE_CMD),
361 CMD(SCAN_ITERATION_COMPLETE_UMAC),
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
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 *
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 trans_cfg.wide_cmd_header = fw_has_api(&mvm->fw->ucode_capa,
478 IWL_UCODE_TLV_API_WIDE_CMD_HDR);
479
480 if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_DW_BC_TABLE)
481 trans_cfg.bc_table_dword = true;
482
483 trans_cfg.command_names = iwl_mvm_cmd_strings;
484
485 trans_cfg.cmd_queue = IWL_MVM_CMD_QUEUE;
486 trans_cfg.cmd_fifo = IWL_MVM_TX_FIFO_CMD;
487 trans_cfg.scd_set_active = true;
488
489 trans_cfg.sdio_adma_addr = fw->sdio_adma_addr;
490
491 /* Set a short watchdog for the command queue */
492 trans_cfg.cmd_q_wdg_timeout =
493 iwl_mvm_get_wd_timeout(mvm, NULL, false, true);
494
495 snprintf(mvm->hw->wiphy->fw_version,
496 sizeof(mvm->hw->wiphy->fw_version),
497 "%s", fw->fw_version);
498
499 /* Configure transport layer */
500 iwl_trans_configure(mvm->trans, &trans_cfg);
501
502 trans->rx_mpdu_cmd = REPLY_RX_MPDU_CMD;
503 trans->rx_mpdu_cmd_hdr_size = sizeof(struct iwl_rx_mpdu_res_start);
504 trans->dbg_dest_tlv = mvm->fw->dbg_dest_tlv;
505 trans->dbg_dest_reg_num = mvm->fw->dbg_dest_reg_num;
506 memcpy(trans->dbg_conf_tlv, mvm->fw->dbg_conf_tlv,
507 sizeof(trans->dbg_conf_tlv));
508 trans->dbg_trigger_tlv = mvm->fw->dbg_trigger_tlv;
509
510 /* set up notification wait support */
511 iwl_notification_wait_init(&mvm->notif_wait);
512
513 /* Init phy db */
514 mvm->phy_db = iwl_phy_db_init(trans);
515 if (!mvm->phy_db) {
516 IWL_ERR(mvm, "Cannot init phy_db\n");
517 goto out_free;
518 }
519
520 IWL_INFO(mvm, "Detected %s, REV=0x%X\n",
521 mvm->cfg->name, mvm->trans->hw_rev);
522
523 min_backoff = calc_min_backoff(trans, cfg);
524 iwl_mvm_tt_initialize(mvm, min_backoff);
525
526 if (iwlwifi_mod_params.nvm_file)
527 mvm->nvm_file_name = iwlwifi_mod_params.nvm_file;
528 else
529 IWL_DEBUG_EEPROM(mvm->trans->dev,
530 "working without external nvm file\n");
531
532 if (WARN(cfg->no_power_up_nic_in_init && !mvm->nvm_file_name,
533 "not allowing power-up and not having nvm_file\n"))
534 goto out_free;
535
536 /*
537 * Even if nvm exists in the nvm_file driver should read again the nvm
538 * from the nic because there might be entries that exist in the OTP
539 * and not in the file.
540 * for nics with no_power_up_nic_in_init: rely completley on nvm_file
541 */
542 if (cfg->no_power_up_nic_in_init && mvm->nvm_file_name) {
543 err = iwl_nvm_init(mvm, false);
544 if (err)
545 goto out_free;
546 } else {
547 err = iwl_trans_start_hw(mvm->trans);
548 if (err)
549 goto out_free;
550
551 mutex_lock(&mvm->mutex);
552 err = iwl_run_init_mvm_ucode(mvm, true);
553 if (!err || !iwlmvm_mod_params.init_dbg)
554 iwl_trans_stop_device(trans);
555 mutex_unlock(&mvm->mutex);
556 /* returns 0 if successful, 1 if success but in rfkill */
557 if (err < 0 && !iwlmvm_mod_params.init_dbg) {
558 IWL_ERR(mvm, "Failed to run INIT ucode: %d\n", err);
559 goto out_free;
560 }
561 }
562
563 scan_size = iwl_mvm_scan_size(mvm);
564
565 mvm->scan_cmd = kmalloc(scan_size, GFP_KERNEL);
566 if (!mvm->scan_cmd)
567 goto out_free;
568
569 /* Set EBS as successful as long as not stated otherwise by the FW. */
570 mvm->last_ebs_successful = true;
571
572 err = iwl_mvm_mac_setup_register(mvm);
573 if (err)
574 goto out_free;
575
576 err = iwl_mvm_dbgfs_register(mvm, dbgfs_dir);
577 if (err)
578 goto out_unregister;
579
580 memset(&mvm->rx_stats, 0, sizeof(struct mvm_statistics_rx));
581
582 /* rpm starts with a taken ref. only set the appropriate bit here. */
583 mvm->refs[IWL_MVM_REF_UCODE_DOWN] = 1;
584
585 iwl_mvm_tof_init(mvm);
586
587 return op_mode;
588
589 out_unregister:
590 ieee80211_unregister_hw(mvm->hw);
591 iwl_mvm_leds_exit(mvm);
592 out_free:
593 flush_delayed_work(&mvm->fw_dump_wk);
594 iwl_phy_db_free(mvm->phy_db);
595 kfree(mvm->scan_cmd);
596 if (!cfg->no_power_up_nic_in_init || !mvm->nvm_file_name)
597 iwl_trans_op_mode_leave(trans);
598 ieee80211_free_hw(mvm->hw);
599 return NULL;
600 }
601
602 static void iwl_op_mode_mvm_stop(struct iwl_op_mode *op_mode)
603 {
604 struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
605 int i;
606
607 iwl_mvm_leds_exit(mvm);
608
609 iwl_mvm_tt_exit(mvm);
610
611 ieee80211_unregister_hw(mvm->hw);
612
613 kfree(mvm->scan_cmd);
614 kfree(mvm->mcast_filter_cmd);
615 mvm->mcast_filter_cmd = NULL;
616
617 #if defined(CONFIG_PM_SLEEP) && defined(CONFIG_IWLWIFI_DEBUGFS)
618 kfree(mvm->d3_resume_sram);
619 if (mvm->nd_config) {
620 kfree(mvm->nd_config->match_sets);
621 kfree(mvm->nd_config);
622 mvm->nd_config = NULL;
623 }
624 #endif
625
626 iwl_trans_op_mode_leave(mvm->trans);
627
628 iwl_phy_db_free(mvm->phy_db);
629 mvm->phy_db = NULL;
630
631 iwl_free_nvm_data(mvm->nvm_data);
632 for (i = 0; i < NVM_MAX_NUM_SECTIONS; i++)
633 kfree(mvm->nvm_sections[i].data);
634
635 iwl_mvm_tof_clean(mvm);
636
637 ieee80211_free_hw(mvm->hw);
638 }
639
640 struct iwl_async_handler_entry {
641 struct list_head list;
642 struct iwl_rx_cmd_buffer rxb;
643 void (*fn)(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb);
644 };
645
646 void iwl_mvm_async_handlers_purge(struct iwl_mvm *mvm)
647 {
648 struct iwl_async_handler_entry *entry, *tmp;
649
650 spin_lock_bh(&mvm->async_handlers_lock);
651 list_for_each_entry_safe(entry, tmp, &mvm->async_handlers_list, list) {
652 iwl_free_rxb(&entry->rxb);
653 list_del(&entry->list);
654 kfree(entry);
655 }
656 spin_unlock_bh(&mvm->async_handlers_lock);
657 }
658
659 static void iwl_mvm_async_handlers_wk(struct work_struct *wk)
660 {
661 struct iwl_mvm *mvm =
662 container_of(wk, struct iwl_mvm, async_handlers_wk);
663 struct iwl_async_handler_entry *entry, *tmp;
664 struct list_head local_list;
665
666 INIT_LIST_HEAD(&local_list);
667
668 /* Ensure that we are not in stop flow (check iwl_mvm_mac_stop) */
669 mutex_lock(&mvm->mutex);
670
671 /*
672 * Sync with Rx path with a lock. Remove all the entries from this list,
673 * add them to a local one (lock free), and then handle them.
674 */
675 spin_lock_bh(&mvm->async_handlers_lock);
676 list_splice_init(&mvm->async_handlers_list, &local_list);
677 spin_unlock_bh(&mvm->async_handlers_lock);
678
679 list_for_each_entry_safe(entry, tmp, &local_list, list) {
680 entry->fn(mvm, &entry->rxb);
681 iwl_free_rxb(&entry->rxb);
682 list_del(&entry->list);
683 kfree(entry);
684 }
685 mutex_unlock(&mvm->mutex);
686 }
687
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 cmds_trig->cmds[i].group_id != pkt->hdr.group_id)
711 continue;
712
713 iwl_mvm_fw_dbg_collect_trig(mvm, trig,
714 "CMD 0x%02x.%02x received",
715 pkt->hdr.group_id, pkt->hdr.cmd);
716 break;
717 }
718 }
719
720 static void iwl_mvm_rx_dispatch(struct iwl_op_mode *op_mode,
721 struct napi_struct *napi,
722 struct iwl_rx_cmd_buffer *rxb)
723 {
724 struct iwl_rx_packet *pkt = rxb_addr(rxb);
725 struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
726 u8 i;
727
728 if (likely(pkt->hdr.cmd == REPLY_RX_MPDU_CMD)) {
729 iwl_mvm_rx_rx_mpdu(mvm, napi, rxb);
730 return;
731 }
732
733 iwl_mvm_rx_check_trigger(mvm, pkt);
734
735 /*
736 * Do the notification wait before RX handlers so
737 * even if the RX handler consumes the RXB we have
738 * access to it in the notification wait entry.
739 */
740 iwl_notification_wait_notify(&mvm->notif_wait, pkt);
741
742 for (i = 0; i < ARRAY_SIZE(iwl_mvm_rx_handlers); i++) {
743 const struct iwl_rx_handlers *rx_h = &iwl_mvm_rx_handlers[i];
744 struct iwl_async_handler_entry *entry;
745
746 if (rx_h->cmd_id != WIDE_ID(pkt->hdr.group_id, pkt->hdr.cmd))
747 continue;
748
749 if (!rx_h->async) {
750 rx_h->fn(mvm, rxb);
751 return;
752 }
753
754 entry = kzalloc(sizeof(*entry), GFP_ATOMIC);
755 /* we can't do much... */
756 if (!entry)
757 return;
758
759 entry->rxb._page = rxb_steal_page(rxb);
760 entry->rxb._offset = rxb->_offset;
761 entry->rxb._rx_page_order = rxb->_rx_page_order;
762 entry->fn = rx_h->fn;
763 spin_lock(&mvm->async_handlers_lock);
764 list_add_tail(&entry->list, &mvm->async_handlers_list);
765 spin_unlock(&mvm->async_handlers_lock);
766 schedule_work(&mvm->async_handlers_wk);
767 break;
768 }
769 }
770
771 static void iwl_mvm_stop_sw_queue(struct iwl_op_mode *op_mode, int queue)
772 {
773 struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
774 int mq = mvm->queue_to_mac80211[queue];
775
776 if (WARN_ON_ONCE(mq == IWL_INVALID_MAC80211_QUEUE))
777 return;
778
779 if (atomic_inc_return(&mvm->mac80211_queue_stop_count[mq]) > 1) {
780 IWL_DEBUG_TX_QUEUES(mvm,
781 "queue %d (mac80211 %d) already stopped\n",
782 queue, mq);
783 return;
784 }
785
786 ieee80211_stop_queue(mvm->hw, mq);
787 }
788
789 static void iwl_mvm_wake_sw_queue(struct iwl_op_mode *op_mode, int queue)
790 {
791 struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
792 int mq = mvm->queue_to_mac80211[queue];
793
794 if (WARN_ON_ONCE(mq == IWL_INVALID_MAC80211_QUEUE))
795 return;
796
797 if (atomic_dec_return(&mvm->mac80211_queue_stop_count[mq]) > 0) {
798 IWL_DEBUG_TX_QUEUES(mvm,
799 "queue %d (mac80211 %d) still stopped\n",
800 queue, mq);
801 return;
802 }
803
804 ieee80211_wake_queue(mvm->hw, mq);
805 }
806
807 void iwl_mvm_set_hw_ctkill_state(struct iwl_mvm *mvm, bool state)
808 {
809 if (state)
810 set_bit(IWL_MVM_STATUS_HW_CTKILL, &mvm->status);
811 else
812 clear_bit(IWL_MVM_STATUS_HW_CTKILL, &mvm->status);
813
814 wiphy_rfkill_set_hw_state(mvm->hw->wiphy, iwl_mvm_is_radio_killed(mvm));
815 }
816
817 static bool iwl_mvm_set_hw_rfkill_state(struct iwl_op_mode *op_mode, bool state)
818 {
819 struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
820 bool calibrating = ACCESS_ONCE(mvm->calibrating);
821
822 if (state)
823 set_bit(IWL_MVM_STATUS_HW_RFKILL, &mvm->status);
824 else
825 clear_bit(IWL_MVM_STATUS_HW_RFKILL, &mvm->status);
826
827 wiphy_rfkill_set_hw_state(mvm->hw->wiphy, iwl_mvm_is_radio_killed(mvm));
828
829 /* iwl_run_init_mvm_ucode is waiting for results, abort it */
830 if (calibrating)
831 iwl_abort_notification_waits(&mvm->notif_wait);
832
833 /*
834 * Stop the device if we run OPERATIONAL firmware or if we are in the
835 * middle of the calibrations.
836 */
837 return state && (mvm->cur_ucode != IWL_UCODE_INIT || calibrating);
838 }
839
840 static void iwl_mvm_free_skb(struct iwl_op_mode *op_mode, struct sk_buff *skb)
841 {
842 struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
843 struct ieee80211_tx_info *info;
844
845 info = IEEE80211_SKB_CB(skb);
846 iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]);
847 ieee80211_free_txskb(mvm->hw, skb);
848 }
849
850 struct iwl_mvm_reprobe {
851 struct device *dev;
852 struct work_struct work;
853 };
854
855 static void iwl_mvm_reprobe_wk(struct work_struct *wk)
856 {
857 struct iwl_mvm_reprobe *reprobe;
858
859 reprobe = container_of(wk, struct iwl_mvm_reprobe, work);
860 if (device_reprobe(reprobe->dev))
861 dev_err(reprobe->dev, "reprobe failed!\n");
862 kfree(reprobe);
863 module_put(THIS_MODULE);
864 }
865
866 static void iwl_mvm_fw_error_dump_wk(struct work_struct *work)
867 {
868 struct iwl_mvm *mvm =
869 container_of(work, struct iwl_mvm, fw_dump_wk.work);
870
871 if (iwl_mvm_ref_sync(mvm, IWL_MVM_REF_FW_DBG_COLLECT))
872 return;
873
874 mutex_lock(&mvm->mutex);
875
876 /* stop recording */
877 if (mvm->cfg->device_family == IWL_DEVICE_FAMILY_7000) {
878 iwl_set_bits_prph(mvm->trans, MON_BUFF_SAMPLE_CTL, 0x100);
879 } else {
880 iwl_write_prph(mvm->trans, DBGC_IN_SAMPLE, 0);
881 /* wait before we collect the data till the DBGC stop */
882 udelay(100);
883 }
884
885 iwl_mvm_fw_error_dump(mvm);
886
887 /* start recording again if the firmware is not crashed */
888 WARN_ON_ONCE((!test_bit(STATUS_FW_ERROR, &mvm->trans->status)) &&
889 mvm->fw->dbg_dest_tlv &&
890 iwl_mvm_start_fw_dbg_conf(mvm, mvm->fw_dbg_conf));
891
892 mutex_unlock(&mvm->mutex);
893
894 iwl_mvm_unref(mvm, IWL_MVM_REF_FW_DBG_COLLECT);
895 }
896
897 void iwl_mvm_nic_restart(struct iwl_mvm *mvm, bool fw_error)
898 {
899 iwl_abort_notification_waits(&mvm->notif_wait);
900
901 /*
902 * This is a bit racy, but worst case we tell mac80211 about
903 * a stopped/aborted scan when that was already done which
904 * is not a problem. It is necessary to abort any os scan
905 * here because mac80211 requires having the scan cleared
906 * before restarting.
907 * We'll reset the scan_status to NONE in restart cleanup in
908 * the next start() call from mac80211. If restart isn't called
909 * (no fw restart) scan status will stay busy.
910 */
911 iwl_mvm_report_scan_aborted(mvm);
912
913 /*
914 * If we're restarting already, don't cycle restarts.
915 * If INIT fw asserted, it will likely fail again.
916 * If WoWLAN fw asserted, don't restart either, mac80211
917 * can't recover this since we're already half suspended.
918 */
919 if (!mvm->restart_fw && fw_error) {
920 iwl_mvm_fw_dbg_collect_desc(mvm, &iwl_mvm_dump_desc_assert,
921 NULL);
922 } else if (test_and_set_bit(IWL_MVM_STATUS_IN_HW_RESTART,
923 &mvm->status)) {
924 struct iwl_mvm_reprobe *reprobe;
925
926 IWL_ERR(mvm,
927 "Firmware error during reconfiguration - reprobe!\n");
928
929 /*
930 * get a module reference to avoid doing this while unloading
931 * anyway and to avoid scheduling a work with code that's
932 * being removed.
933 */
934 if (!try_module_get(THIS_MODULE)) {
935 IWL_ERR(mvm, "Module is being unloaded - abort\n");
936 return;
937 }
938
939 reprobe = kzalloc(sizeof(*reprobe), GFP_ATOMIC);
940 if (!reprobe) {
941 module_put(THIS_MODULE);
942 return;
943 }
944 reprobe->dev = mvm->trans->dev;
945 INIT_WORK(&reprobe->work, iwl_mvm_reprobe_wk);
946 schedule_work(&reprobe->work);
947 } else if (mvm->cur_ucode == IWL_UCODE_REGULAR) {
948 /* don't let the transport/FW power down */
949 iwl_mvm_ref(mvm, IWL_MVM_REF_UCODE_DOWN);
950
951 if (fw_error && mvm->restart_fw > 0)
952 mvm->restart_fw--;
953 ieee80211_restart_hw(mvm->hw);
954 }
955 }
956
957 static void iwl_mvm_nic_error(struct iwl_op_mode *op_mode)
958 {
959 struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
960
961 iwl_mvm_dump_nic_error_log(mvm);
962
963 iwl_mvm_nic_restart(mvm, true);
964 }
965
966 static void iwl_mvm_cmd_queue_full(struct iwl_op_mode *op_mode)
967 {
968 struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
969
970 WARN_ON(1);
971 iwl_mvm_nic_restart(mvm, true);
972 }
973
974 struct iwl_d0i3_iter_data {
975 struct iwl_mvm *mvm;
976 u8 ap_sta_id;
977 u8 vif_count;
978 u8 offloading_tid;
979 bool disable_offloading;
980 };
981
982 static bool iwl_mvm_disallow_offloading(struct iwl_mvm *mvm,
983 struct ieee80211_vif *vif,
984 struct iwl_d0i3_iter_data *iter_data)
985 {
986 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
987 struct ieee80211_sta *ap_sta;
988 struct iwl_mvm_sta *mvmsta;
989 u32 available_tids = 0;
990 u8 tid;
991
992 if (WARN_ON(vif->type != NL80211_IFTYPE_STATION ||
993 mvmvif->ap_sta_id == IWL_MVM_STATION_COUNT))
994 return false;
995
996 ap_sta = rcu_dereference(mvm->fw_id_to_mac_id[mvmvif->ap_sta_id]);
997 if (IS_ERR_OR_NULL(ap_sta))
998 return false;
999
1000 mvmsta = iwl_mvm_sta_from_mac80211(ap_sta);
1001 spin_lock_bh(&mvmsta->lock);
1002 for (tid = 0; tid < IWL_MAX_TID_COUNT; tid++) {
1003 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
1004
1005 /*
1006 * in case of pending tx packets, don't use this tid
1007 * for offloading in order to prevent reuse of the same
1008 * qos seq counters.
1009 */
1010 if (iwl_mvm_tid_queued(tid_data))
1011 continue;
1012
1013 if (tid_data->state != IWL_AGG_OFF)
1014 continue;
1015
1016 available_tids |= BIT(tid);
1017 }
1018 spin_unlock_bh(&mvmsta->lock);
1019
1020 /*
1021 * disallow protocol offloading if we have no available tid
1022 * (with no pending frames and no active aggregation,
1023 * as we don't handle "holes" properly - the scheduler needs the
1024 * frame's seq number and TFD index to match)
1025 */
1026 if (!available_tids)
1027 return true;
1028
1029 /* for simplicity, just use the first available tid */
1030 iter_data->offloading_tid = ffs(available_tids) - 1;
1031 return false;
1032 }
1033
1034 static void iwl_mvm_enter_d0i3_iterator(void *_data, u8 *mac,
1035 struct ieee80211_vif *vif)
1036 {
1037 struct iwl_d0i3_iter_data *data = _data;
1038 struct iwl_mvm *mvm = data->mvm;
1039 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1040 u32 flags = CMD_ASYNC | CMD_HIGH_PRIO | CMD_SEND_IN_IDLE;
1041
1042 IWL_DEBUG_RPM(mvm, "entering D0i3 - vif %pM\n", vif->addr);
1043 if (vif->type != NL80211_IFTYPE_STATION ||
1044 !vif->bss_conf.assoc)
1045 return;
1046
1047 /*
1048 * in case of pending tx packets or active aggregations,
1049 * avoid offloading features in order to prevent reuse of
1050 * the same qos seq counters.
1051 */
1052 if (iwl_mvm_disallow_offloading(mvm, vif, data))
1053 data->disable_offloading = true;
1054
1055 iwl_mvm_update_d0i3_power_mode(mvm, vif, true, flags);
1056 iwl_mvm_send_proto_offload(mvm, vif, data->disable_offloading, flags);
1057
1058 /*
1059 * on init/association, mvm already configures POWER_TABLE_CMD
1060 * and REPLY_MCAST_FILTER_CMD, so currently don't
1061 * reconfigure them (we might want to use different
1062 * params later on, though).
1063 */
1064 data->ap_sta_id = mvmvif->ap_sta_id;
1065 data->vif_count++;
1066 }
1067
1068 static void iwl_mvm_set_wowlan_data(struct iwl_mvm *mvm,
1069 struct iwl_wowlan_config_cmd *cmd,
1070 struct iwl_d0i3_iter_data *iter_data)
1071 {
1072 struct ieee80211_sta *ap_sta;
1073 struct iwl_mvm_sta *mvm_ap_sta;
1074
1075 if (iter_data->ap_sta_id == IWL_MVM_STATION_COUNT)
1076 return;
1077
1078 rcu_read_lock();
1079
1080 ap_sta = rcu_dereference(mvm->fw_id_to_mac_id[iter_data->ap_sta_id]);
1081 if (IS_ERR_OR_NULL(ap_sta))
1082 goto out;
1083
1084 mvm_ap_sta = iwl_mvm_sta_from_mac80211(ap_sta);
1085 cmd->is_11n_connection = ap_sta->ht_cap.ht_supported;
1086 cmd->offloading_tid = iter_data->offloading_tid;
1087
1088 /*
1089 * The d0i3 uCode takes care of the nonqos counters,
1090 * so configure only the qos seq ones.
1091 */
1092 iwl_mvm_set_wowlan_qos_seq(mvm_ap_sta, cmd);
1093 out:
1094 rcu_read_unlock();
1095 }
1096
1097 int iwl_mvm_enter_d0i3(struct iwl_op_mode *op_mode)
1098 {
1099 struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
1100 u32 flags = CMD_ASYNC | CMD_HIGH_PRIO | CMD_SEND_IN_IDLE;
1101 int ret;
1102 struct iwl_d0i3_iter_data d0i3_iter_data = {
1103 .mvm = mvm,
1104 };
1105 struct iwl_wowlan_config_cmd wowlan_config_cmd = {
1106 .wakeup_filter = cpu_to_le32(IWL_WOWLAN_WAKEUP_RX_FRAME |
1107 IWL_WOWLAN_WAKEUP_BEACON_MISS |
1108 IWL_WOWLAN_WAKEUP_LINK_CHANGE |
1109 IWL_WOWLAN_WAKEUP_BCN_FILTERING),
1110 };
1111 struct iwl_d3_manager_config d3_cfg_cmd = {
1112 .min_sleep_time = cpu_to_le32(1000),
1113 .wakeup_flags = cpu_to_le32(IWL_WAKEUP_D3_CONFIG_FW_ERROR),
1114 };
1115
1116 IWL_DEBUG_RPM(mvm, "MVM entering D0i3\n");
1117
1118 set_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status);
1119
1120 /*
1121 * iwl_mvm_ref_sync takes a reference before checking the flag.
1122 * so by checking there is no held reference we prevent a state
1123 * in which iwl_mvm_ref_sync continues successfully while we
1124 * configure the firmware to enter d0i3
1125 */
1126 if (iwl_mvm_ref_taken(mvm)) {
1127 IWL_DEBUG_RPM(mvm->trans, "abort d0i3 due to taken ref\n");
1128 clear_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status);
1129 wake_up(&mvm->d0i3_exit_waitq);
1130 return 1;
1131 }
1132
1133 ieee80211_iterate_active_interfaces_atomic(mvm->hw,
1134 IEEE80211_IFACE_ITER_NORMAL,
1135 iwl_mvm_enter_d0i3_iterator,
1136 &d0i3_iter_data);
1137 if (d0i3_iter_data.vif_count == 1) {
1138 mvm->d0i3_ap_sta_id = d0i3_iter_data.ap_sta_id;
1139 mvm->d0i3_offloading = !d0i3_iter_data.disable_offloading;
1140 } else {
1141 WARN_ON_ONCE(d0i3_iter_data.vif_count > 1);
1142 mvm->d0i3_ap_sta_id = IWL_MVM_STATION_COUNT;
1143 mvm->d0i3_offloading = false;
1144 }
1145
1146 /* make sure we have no running tx while configuring the seqno */
1147 synchronize_net();
1148
1149 iwl_mvm_set_wowlan_data(mvm, &wowlan_config_cmd, &d0i3_iter_data);
1150 ret = iwl_mvm_send_cmd_pdu(mvm, WOWLAN_CONFIGURATION, flags,
1151 sizeof(wowlan_config_cmd),
1152 &wowlan_config_cmd);
1153 if (ret)
1154 return ret;
1155
1156 return iwl_mvm_send_cmd_pdu(mvm, D3_CONFIG_CMD,
1157 flags | CMD_MAKE_TRANS_IDLE,
1158 sizeof(d3_cfg_cmd), &d3_cfg_cmd);
1159 }
1160
1161 static void iwl_mvm_exit_d0i3_iterator(void *_data, u8 *mac,
1162 struct ieee80211_vif *vif)
1163 {
1164 struct iwl_mvm *mvm = _data;
1165 u32 flags = CMD_ASYNC | CMD_HIGH_PRIO;
1166
1167 IWL_DEBUG_RPM(mvm, "exiting D0i3 - vif %pM\n", vif->addr);
1168 if (vif->type != NL80211_IFTYPE_STATION ||
1169 !vif->bss_conf.assoc)
1170 return;
1171
1172 iwl_mvm_update_d0i3_power_mode(mvm, vif, false, flags);
1173 }
1174
1175 struct iwl_mvm_wakeup_reason_iter_data {
1176 struct iwl_mvm *mvm;
1177 u32 wakeup_reasons;
1178 };
1179
1180 static void iwl_mvm_d0i3_wakeup_reason_iter(void *_data, u8 *mac,
1181 struct ieee80211_vif *vif)
1182 {
1183 struct iwl_mvm_wakeup_reason_iter_data *data = _data;
1184 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1185
1186 if (vif->type == NL80211_IFTYPE_STATION && vif->bss_conf.assoc &&
1187 data->mvm->d0i3_ap_sta_id == mvmvif->ap_sta_id) {
1188 if (data->wakeup_reasons &
1189 IWL_WOWLAN_WAKEUP_BY_DISCONNECTION_ON_DEAUTH)
1190 iwl_mvm_connection_loss(data->mvm, vif, "D0i3");
1191 else
1192 ieee80211_beacon_loss(vif);
1193 }
1194 }
1195
1196 void iwl_mvm_d0i3_enable_tx(struct iwl_mvm *mvm, __le16 *qos_seq)
1197 {
1198 struct ieee80211_sta *sta = NULL;
1199 struct iwl_mvm_sta *mvm_ap_sta;
1200 int i;
1201 bool wake_queues = false;
1202
1203 lockdep_assert_held(&mvm->mutex);
1204
1205 spin_lock_bh(&mvm->d0i3_tx_lock);
1206
1207 if (mvm->d0i3_ap_sta_id == IWL_MVM_STATION_COUNT)
1208 goto out;
1209
1210 IWL_DEBUG_RPM(mvm, "re-enqueue packets\n");
1211
1212 /* get the sta in order to update seq numbers and re-enqueue skbs */
1213 sta = rcu_dereference_protected(
1214 mvm->fw_id_to_mac_id[mvm->d0i3_ap_sta_id],
1215 lockdep_is_held(&mvm->mutex));
1216
1217 if (IS_ERR_OR_NULL(sta)) {
1218 sta = NULL;
1219 goto out;
1220 }
1221
1222 if (mvm->d0i3_offloading && qos_seq) {
1223 /* update qos seq numbers if offloading was enabled */
1224 mvm_ap_sta = iwl_mvm_sta_from_mac80211(sta);
1225 for (i = 0; i < IWL_MAX_TID_COUNT; i++) {
1226 u16 seq = le16_to_cpu(qos_seq[i]);
1227 /* firmware stores last-used one, we store next one */
1228 seq += 0x10;
1229 mvm_ap_sta->tid_data[i].seq_number = seq;
1230 }
1231 }
1232 out:
1233 /* re-enqueue (or drop) all packets */
1234 while (!skb_queue_empty(&mvm->d0i3_tx)) {
1235 struct sk_buff *skb = __skb_dequeue(&mvm->d0i3_tx);
1236
1237 if (!sta || iwl_mvm_tx_skb(mvm, skb, sta))
1238 ieee80211_free_txskb(mvm->hw, skb);
1239
1240 /* if the skb_queue is not empty, we need to wake queues */
1241 wake_queues = true;
1242 }
1243 clear_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status);
1244 wake_up(&mvm->d0i3_exit_waitq);
1245 mvm->d0i3_ap_sta_id = IWL_MVM_STATION_COUNT;
1246 if (wake_queues)
1247 ieee80211_wake_queues(mvm->hw);
1248
1249 spin_unlock_bh(&mvm->d0i3_tx_lock);
1250 }
1251
1252 static void iwl_mvm_d0i3_exit_work(struct work_struct *wk)
1253 {
1254 struct iwl_mvm *mvm = container_of(wk, struct iwl_mvm, d0i3_exit_work);
1255 struct iwl_host_cmd get_status_cmd = {
1256 .id = WOWLAN_GET_STATUSES,
1257 .flags = CMD_HIGH_PRIO | CMD_WANT_SKB,
1258 };
1259 struct iwl_wowlan_status *status;
1260 int ret;
1261 u32 handled_reasons, wakeup_reasons;
1262 __le16 *qos_seq = NULL;
1263
1264 mutex_lock(&mvm->mutex);
1265 ret = iwl_mvm_send_cmd(mvm, &get_status_cmd);
1266 if (ret)
1267 goto out;
1268
1269 if (!get_status_cmd.resp_pkt)
1270 goto out;
1271
1272 status = (void *)get_status_cmd.resp_pkt->data;
1273 wakeup_reasons = le32_to_cpu(status->wakeup_reasons);
1274 qos_seq = status->qos_seq_ctr;
1275
1276 IWL_DEBUG_RPM(mvm, "wakeup reasons: 0x%x\n", wakeup_reasons);
1277
1278 handled_reasons = IWL_WOWLAN_WAKEUP_BY_DISCONNECTION_ON_MISSED_BEACON |
1279 IWL_WOWLAN_WAKEUP_BY_DISCONNECTION_ON_DEAUTH;
1280 if (wakeup_reasons & handled_reasons) {
1281 struct iwl_mvm_wakeup_reason_iter_data data = {
1282 .mvm = mvm,
1283 .wakeup_reasons = wakeup_reasons,
1284 };
1285
1286 ieee80211_iterate_active_interfaces(
1287 mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
1288 iwl_mvm_d0i3_wakeup_reason_iter, &data);
1289 }
1290 out:
1291 iwl_mvm_d0i3_enable_tx(mvm, qos_seq);
1292
1293 /* qos_seq might point inside resp_pkt, so free it only now */
1294 if (get_status_cmd.resp_pkt)
1295 iwl_free_resp(&get_status_cmd);
1296
1297 /* the FW might have updated the regdomain */
1298 iwl_mvm_update_changed_regdom(mvm);
1299
1300 iwl_mvm_unref(mvm, IWL_MVM_REF_EXIT_WORK);
1301 mutex_unlock(&mvm->mutex);
1302 }
1303
1304 int _iwl_mvm_exit_d0i3(struct iwl_mvm *mvm)
1305 {
1306 u32 flags = CMD_ASYNC | CMD_HIGH_PRIO | CMD_SEND_IN_IDLE |
1307 CMD_WAKE_UP_TRANS;
1308 int ret;
1309
1310 IWL_DEBUG_RPM(mvm, "MVM exiting D0i3\n");
1311
1312 mutex_lock(&mvm->d0i3_suspend_mutex);
1313 if (test_bit(D0I3_DEFER_WAKEUP, &mvm->d0i3_suspend_flags)) {
1314 IWL_DEBUG_RPM(mvm, "Deferring d0i3 exit until resume\n");
1315 __set_bit(D0I3_PENDING_WAKEUP, &mvm->d0i3_suspend_flags);
1316 mutex_unlock(&mvm->d0i3_suspend_mutex);
1317 return 0;
1318 }
1319 mutex_unlock(&mvm->d0i3_suspend_mutex);
1320
1321 ret = iwl_mvm_send_cmd_pdu(mvm, D0I3_END_CMD, flags, 0, NULL);
1322 if (ret)
1323 goto out;
1324
1325 ieee80211_iterate_active_interfaces_atomic(mvm->hw,
1326 IEEE80211_IFACE_ITER_NORMAL,
1327 iwl_mvm_exit_d0i3_iterator,
1328 mvm);
1329 out:
1330 schedule_work(&mvm->d0i3_exit_work);
1331 return ret;
1332 }
1333
1334 int iwl_mvm_exit_d0i3(struct iwl_op_mode *op_mode)
1335 {
1336 struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
1337
1338 iwl_mvm_ref(mvm, IWL_MVM_REF_EXIT_WORK);
1339 return _iwl_mvm_exit_d0i3(mvm);
1340 }
1341
1342 static const struct iwl_op_mode_ops iwl_mvm_ops = {
1343 .start = iwl_op_mode_mvm_start,
1344 .stop = iwl_op_mode_mvm_stop,
1345 .rx = iwl_mvm_rx_dispatch,
1346 .queue_full = iwl_mvm_stop_sw_queue,
1347 .queue_not_full = iwl_mvm_wake_sw_queue,
1348 .hw_rf_kill = iwl_mvm_set_hw_rfkill_state,
1349 .free_skb = iwl_mvm_free_skb,
1350 .nic_error = iwl_mvm_nic_error,
1351 .cmd_queue_full = iwl_mvm_cmd_queue_full,
1352 .nic_config = iwl_mvm_nic_config,
1353 .enter_d0i3 = iwl_mvm_enter_d0i3,
1354 .exit_d0i3 = iwl_mvm_exit_d0i3,
1355 };
Linux kernel - Deliverables
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