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iwlwifi: mvm: Remove old scan commands
[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 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_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
265 };
266 #undef RX_HANDLER
267 #define CMD(x) [x] = #x
268
269 static const char *const iwl_mvm_cmd_strings[REPLY_MAX] = {
270 CMD(MVM_ALIVE),
271 CMD(REPLY_ERROR),
272 CMD(INIT_COMPLETE_NOTIF),
273 CMD(PHY_CONTEXT_CMD),
274 CMD(MGMT_MCAST_KEY),
275 CMD(TX_CMD),
276 CMD(TXPATH_FLUSH),
277 CMD(SHARED_MEM_CFG),
278 CMD(MAC_CONTEXT_CMD),
279 CMD(TIME_EVENT_CMD),
280 CMD(TIME_EVENT_NOTIFICATION),
281 CMD(BINDING_CONTEXT_CMD),
282 CMD(TIME_QUOTA_CMD),
283 CMD(NON_QOS_TX_COUNTER_CMD),
284 CMD(NVM_ACCESS_CMD),
285 CMD(PHY_CONFIGURATION_CMD),
286 CMD(CALIB_RES_NOTIF_PHY_DB),
287 CMD(SET_CALIB_DEFAULT_CMD),
288 CMD(ADD_STA_KEY),
289 CMD(ADD_STA),
290 CMD(REMOVE_STA),
291 CMD(LQ_CMD),
292 CMD(SCAN_OFFLOAD_CONFIG_CMD),
293 CMD(MATCH_FOUND_NOTIFICATION),
294 CMD(SCAN_OFFLOAD_REQUEST_CMD),
295 CMD(SCAN_OFFLOAD_ABORT_CMD),
296 CMD(HOT_SPOT_CMD),
297 CMD(SCAN_OFFLOAD_COMPLETE),
298 CMD(SCAN_OFFLOAD_UPDATE_PROFILES_CMD),
299 CMD(SCAN_ITERATION_COMPLETE),
300 CMD(POWER_TABLE_CMD),
301 CMD(WEP_KEY),
302 CMD(REPLY_RX_PHY_CMD),
303 CMD(REPLY_RX_MPDU_CMD),
304 CMD(BEACON_NOTIFICATION),
305 CMD(BEACON_TEMPLATE_CMD),
306 CMD(STATISTICS_CMD),
307 CMD(STATISTICS_NOTIFICATION),
308 CMD(EOSP_NOTIFICATION),
309 CMD(REDUCE_TX_POWER_CMD),
310 CMD(TX_ANT_CONFIGURATION_CMD),
311 CMD(D3_CONFIG_CMD),
312 CMD(D0I3_END_CMD),
313 CMD(PROT_OFFLOAD_CONFIG_CMD),
314 CMD(OFFLOADS_QUERY_CMD),
315 CMD(REMOTE_WAKE_CONFIG_CMD),
316 CMD(WOWLAN_PATTERNS),
317 CMD(WOWLAN_CONFIGURATION),
318 CMD(WOWLAN_TSC_RSC_PARAM),
319 CMD(WOWLAN_TKIP_PARAM),
320 CMD(WOWLAN_KEK_KCK_MATERIAL),
321 CMD(WOWLAN_GET_STATUSES),
322 CMD(WOWLAN_TX_POWER_PER_DB),
323 CMD(SCAN_OFFLOAD_PROFILES_QUERY_CMD),
324 CMD(SCAN_OFFLOAD_HOTSPOTS_CONFIG_CMD),
325 CMD(SCAN_OFFLOAD_HOTSPOTS_QUERY_CMD),
326 CMD(CARD_STATE_NOTIFICATION),
327 CMD(MISSED_BEACONS_NOTIFICATION),
328 CMD(BT_COEX_PRIO_TABLE),
329 CMD(BT_COEX_PROT_ENV),
330 CMD(BT_PROFILE_NOTIFICATION),
331 CMD(BT_CONFIG),
332 CMD(MCAST_FILTER_CMD),
333 CMD(BCAST_FILTER_CMD),
334 CMD(REPLY_SF_CFG_CMD),
335 CMD(REPLY_BEACON_FILTERING_CMD),
336 CMD(CMD_DTS_MEASUREMENT_TRIGGER),
337 CMD(DTS_MEASUREMENT_NOTIFICATION),
338 CMD(REPLY_THERMAL_MNG_BACKOFF),
339 CMD(MAC_PM_POWER_TABLE),
340 CMD(LTR_CONFIG),
341 CMD(BT_COEX_CI),
342 CMD(BT_COEX_UPDATE_SW_BOOST),
343 CMD(BT_COEX_UPDATE_CORUN_LUT),
344 CMD(BT_COEX_UPDATE_REDUCED_TXP),
345 CMD(PSM_UAPSD_AP_MISBEHAVING_NOTIFICATION),
346 CMD(ANTENNA_COUPLING_NOTIFICATION),
347 CMD(SCD_QUEUE_CFG),
348 CMD(SCAN_CFG_CMD),
349 CMD(SCAN_REQ_UMAC),
350 CMD(SCAN_ABORT_UMAC),
351 CMD(SCAN_COMPLETE_UMAC),
352 CMD(TDLS_CHANNEL_SWITCH_CMD),
353 CMD(TDLS_CHANNEL_SWITCH_NOTIFICATION),
354 CMD(TDLS_CONFIG_CMD),
355 CMD(MCC_UPDATE_CMD),
356 CMD(SCAN_ITERATION_COMPLETE_UMAC),
357 };
358 #undef CMD
359
360 /* this forward declaration can avoid to export the function */
361 static void iwl_mvm_async_handlers_wk(struct work_struct *wk);
362 static void iwl_mvm_d0i3_exit_work(struct work_struct *wk);
363
364 static u32 calc_min_backoff(struct iwl_trans *trans, const struct iwl_cfg *cfg)
365 {
366 const struct iwl_pwr_tx_backoff *pwr_tx_backoff = cfg->pwr_tx_backoffs;
367
368 if (!pwr_tx_backoff)
369 return 0;
370
371 while (pwr_tx_backoff->pwr) {
372 if (trans->dflt_pwr_limit >= pwr_tx_backoff->pwr)
373 return pwr_tx_backoff->backoff;
374
375 pwr_tx_backoff++;
376 }
377
378 return 0;
379 }
380
381 static void iwl_mvm_fw_error_dump_wk(struct work_struct *work);
382
383 static struct iwl_op_mode *
384 iwl_op_mode_mvm_start(struct iwl_trans *trans, const struct iwl_cfg *cfg,
385 const struct iwl_fw *fw, struct dentry *dbgfs_dir)
386 {
387 struct ieee80211_hw *hw;
388 struct iwl_op_mode *op_mode;
389 struct iwl_mvm *mvm;
390 struct iwl_trans_config trans_cfg = {};
391 static const u8 no_reclaim_cmds[] = {
392 TX_CMD,
393 };
394 int err, scan_size;
395 u32 min_backoff;
396
397 /*
398 * We use IWL_MVM_STATION_COUNT to check the validity of the station
399 * index all over the driver - check that its value corresponds to the
400 * array size.
401 */
402 BUILD_BUG_ON(ARRAY_SIZE(mvm->fw_id_to_mac_id) != IWL_MVM_STATION_COUNT);
403
404 /********************************
405 * 1. Allocating and configuring HW data
406 ********************************/
407 hw = ieee80211_alloc_hw(sizeof(struct iwl_op_mode) +
408 sizeof(struct iwl_mvm),
409 &iwl_mvm_hw_ops);
410 if (!hw)
411 return NULL;
412
413 if (cfg->max_rx_agg_size)
414 hw->max_rx_aggregation_subframes = cfg->max_rx_agg_size;
415
416 if (cfg->max_tx_agg_size)
417 hw->max_tx_aggregation_subframes = cfg->max_tx_agg_size;
418
419 op_mode = hw->priv;
420 op_mode->ops = &iwl_mvm_ops;
421
422 mvm = IWL_OP_MODE_GET_MVM(op_mode);
423 mvm->dev = trans->dev;
424 mvm->trans = trans;
425 mvm->cfg = cfg;
426 mvm->fw = fw;
427 mvm->hw = hw;
428
429 mvm->restart_fw = iwlwifi_mod_params.restart_fw ? -1 : 0;
430
431 mvm->aux_queue = 15;
432 mvm->first_agg_queue = 16;
433 mvm->last_agg_queue = mvm->cfg->base_params->num_of_queues - 1;
434 if (mvm->cfg->base_params->num_of_queues == 16) {
435 mvm->aux_queue = 11;
436 mvm->first_agg_queue = 12;
437 }
438 mvm->sf_state = SF_UNINIT;
439 mvm->low_latency_agg_frame_limit = 6;
440 mvm->cur_ucode = IWL_UCODE_INIT;
441
442 mutex_init(&mvm->mutex);
443 mutex_init(&mvm->d0i3_suspend_mutex);
444 spin_lock_init(&mvm->async_handlers_lock);
445 INIT_LIST_HEAD(&mvm->time_event_list);
446 INIT_LIST_HEAD(&mvm->aux_roc_te_list);
447 INIT_LIST_HEAD(&mvm->async_handlers_list);
448 spin_lock_init(&mvm->time_event_lock);
449
450 INIT_WORK(&mvm->async_handlers_wk, iwl_mvm_async_handlers_wk);
451 INIT_WORK(&mvm->roc_done_wk, iwl_mvm_roc_done_wk);
452 INIT_WORK(&mvm->sta_drained_wk, iwl_mvm_sta_drained_wk);
453 INIT_WORK(&mvm->d0i3_exit_work, iwl_mvm_d0i3_exit_work);
454 INIT_DELAYED_WORK(&mvm->fw_dump_wk, iwl_mvm_fw_error_dump_wk);
455 INIT_DELAYED_WORK(&mvm->tdls_cs.dwork, iwl_mvm_tdls_ch_switch_work);
456
457 spin_lock_init(&mvm->d0i3_tx_lock);
458 spin_lock_init(&mvm->refs_lock);
459 skb_queue_head_init(&mvm->d0i3_tx);
460 init_waitqueue_head(&mvm->d0i3_exit_waitq);
461
462 SET_IEEE80211_DEV(mvm->hw, mvm->trans->dev);
463
464 /*
465 * Populate the state variables that the transport layer needs
466 * to know about.
467 */
468 trans_cfg.op_mode = op_mode;
469 trans_cfg.no_reclaim_cmds = no_reclaim_cmds;
470 trans_cfg.n_no_reclaim_cmds = ARRAY_SIZE(no_reclaim_cmds);
471 trans_cfg.rx_buf_size_8k = iwlwifi_mod_params.amsdu_size_8K;
472
473 if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_DW_BC_TABLE)
474 trans_cfg.bc_table_dword = true;
475
476 trans_cfg.command_names = iwl_mvm_cmd_strings;
477
478 trans_cfg.cmd_queue = IWL_MVM_CMD_QUEUE;
479 trans_cfg.cmd_fifo = IWL_MVM_TX_FIFO_CMD;
480 trans_cfg.scd_set_active = true;
481
482 trans_cfg.sdio_adma_addr = fw->sdio_adma_addr;
483
484 /* Set a short watchdog for the command queue */
485 trans_cfg.cmd_q_wdg_timeout =
486 iwl_mvm_get_wd_timeout(mvm, NULL, false, true);
487
488 snprintf(mvm->hw->wiphy->fw_version,
489 sizeof(mvm->hw->wiphy->fw_version),
490 "%s", fw->fw_version);
491
492 /* Configure transport layer */
493 iwl_trans_configure(mvm->trans, &trans_cfg);
494
495 trans->rx_mpdu_cmd = REPLY_RX_MPDU_CMD;
496 trans->rx_mpdu_cmd_hdr_size = sizeof(struct iwl_rx_mpdu_res_start);
497 trans->dbg_dest_tlv = mvm->fw->dbg_dest_tlv;
498 trans->dbg_dest_reg_num = mvm->fw->dbg_dest_reg_num;
499 memcpy(trans->dbg_conf_tlv, mvm->fw->dbg_conf_tlv,
500 sizeof(trans->dbg_conf_tlv));
501 trans->dbg_trigger_tlv = mvm->fw->dbg_trigger_tlv;
502
503 /* set up notification wait support */
504 iwl_notification_wait_init(&mvm->notif_wait);
505
506 /* Init phy db */
507 mvm->phy_db = iwl_phy_db_init(trans);
508 if (!mvm->phy_db) {
509 IWL_ERR(mvm, "Cannot init phy_db\n");
510 goto out_free;
511 }
512
513 IWL_INFO(mvm, "Detected %s, REV=0x%X\n",
514 mvm->cfg->name, mvm->trans->hw_rev);
515
516 min_backoff = calc_min_backoff(trans, cfg);
517 iwl_mvm_tt_initialize(mvm, min_backoff);
518
519 if (iwlwifi_mod_params.nvm_file)
520 mvm->nvm_file_name = iwlwifi_mod_params.nvm_file;
521 else
522 IWL_DEBUG_EEPROM(mvm->trans->dev,
523 "working without external nvm file\n");
524
525 if (WARN(cfg->no_power_up_nic_in_init && !mvm->nvm_file_name,
526 "not allowing power-up and not having nvm_file\n"))
527 goto out_free;
528
529 /*
530 * Even if nvm exists in the nvm_file driver should read again the nvm
531 * from the nic because there might be entries that exist in the OTP
532 * and not in the file.
533 * for nics with no_power_up_nic_in_init: rely completley on nvm_file
534 */
535 if (cfg->no_power_up_nic_in_init && mvm->nvm_file_name) {
536 err = iwl_nvm_init(mvm, false);
537 if (err)
538 goto out_free;
539 } else {
540 err = iwl_trans_start_hw(mvm->trans);
541 if (err)
542 goto out_free;
543
544 mutex_lock(&mvm->mutex);
545 err = iwl_run_init_mvm_ucode(mvm, true);
546 if (!err || !iwlmvm_mod_params.init_dbg)
547 iwl_trans_stop_device(trans);
548 mutex_unlock(&mvm->mutex);
549 /* returns 0 if successful, 1 if success but in rfkill */
550 if (err < 0 && !iwlmvm_mod_params.init_dbg) {
551 IWL_ERR(mvm, "Failed to run INIT ucode: %d\n", err);
552 goto out_free;
553 }
554 }
555
556 scan_size = iwl_mvm_scan_size(mvm);
557
558 mvm->scan_cmd = kmalloc(scan_size, GFP_KERNEL);
559 if (!mvm->scan_cmd)
560 goto out_free;
561
562 /* Set EBS as successful as long as not stated otherwise by the FW. */
563 mvm->last_ebs_successful = true;
564
565 err = iwl_mvm_mac_setup_register(mvm);
566 if (err)
567 goto out_free;
568
569 err = iwl_mvm_dbgfs_register(mvm, dbgfs_dir);
570 if (err)
571 goto out_unregister;
572
573 memset(&mvm->rx_stats, 0, sizeof(struct mvm_statistics_rx));
574
575 /* rpm starts with a taken ref. only set the appropriate bit here. */
576 mvm->refs[IWL_MVM_REF_UCODE_DOWN] = 1;
577
578 return op_mode;
579
580 out_unregister:
581 ieee80211_unregister_hw(mvm->hw);
582 iwl_mvm_leds_exit(mvm);
583 out_free:
584 iwl_phy_db_free(mvm->phy_db);
585 kfree(mvm->scan_cmd);
586 if (!cfg->no_power_up_nic_in_init || !mvm->nvm_file_name)
587 iwl_trans_op_mode_leave(trans);
588 ieee80211_free_hw(mvm->hw);
589 return NULL;
590 }
591
592 static void iwl_op_mode_mvm_stop(struct iwl_op_mode *op_mode)
593 {
594 struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
595 int i;
596
597 iwl_mvm_leds_exit(mvm);
598
599 iwl_mvm_tt_exit(mvm);
600
601 ieee80211_unregister_hw(mvm->hw);
602
603 kfree(mvm->scan_cmd);
604 kfree(mvm->mcast_filter_cmd);
605 mvm->mcast_filter_cmd = NULL;
606
607 #if defined(CONFIG_PM_SLEEP) && defined(CONFIG_IWLWIFI_DEBUGFS)
608 kfree(mvm->d3_resume_sram);
609 if (mvm->nd_config) {
610 kfree(mvm->nd_config->match_sets);
611 kfree(mvm->nd_config);
612 mvm->nd_config = NULL;
613 }
614 #endif
615
616 iwl_trans_op_mode_leave(mvm->trans);
617
618 iwl_phy_db_free(mvm->phy_db);
619 mvm->phy_db = NULL;
620
621 iwl_free_nvm_data(mvm->nvm_data);
622 for (i = 0; i < NVM_MAX_NUM_SECTIONS; i++)
623 kfree(mvm->nvm_sections[i].data);
624
625 ieee80211_free_hw(mvm->hw);
626 }
627
628 struct iwl_async_handler_entry {
629 struct list_head list;
630 struct iwl_rx_cmd_buffer rxb;
631 int (*fn)(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb,
632 struct iwl_device_cmd *cmd);
633 };
634
635 void iwl_mvm_async_handlers_purge(struct iwl_mvm *mvm)
636 {
637 struct iwl_async_handler_entry *entry, *tmp;
638
639 spin_lock_bh(&mvm->async_handlers_lock);
640 list_for_each_entry_safe(entry, tmp, &mvm->async_handlers_list, list) {
641 iwl_free_rxb(&entry->rxb);
642 list_del(&entry->list);
643 kfree(entry);
644 }
645 spin_unlock_bh(&mvm->async_handlers_lock);
646 }
647
648 static void iwl_mvm_async_handlers_wk(struct work_struct *wk)
649 {
650 struct iwl_mvm *mvm =
651 container_of(wk, struct iwl_mvm, async_handlers_wk);
652 struct iwl_async_handler_entry *entry, *tmp;
653 struct list_head local_list;
654
655 INIT_LIST_HEAD(&local_list);
656
657 /* Ensure that we are not in stop flow (check iwl_mvm_mac_stop) */
658 mutex_lock(&mvm->mutex);
659
660 /*
661 * Sync with Rx path with a lock. Remove all the entries from this list,
662 * add them to a local one (lock free), and then handle them.
663 */
664 spin_lock_bh(&mvm->async_handlers_lock);
665 list_splice_init(&mvm->async_handlers_list, &local_list);
666 spin_unlock_bh(&mvm->async_handlers_lock);
667
668 list_for_each_entry_safe(entry, tmp, &local_list, list) {
669 if (entry->fn(mvm, &entry->rxb, NULL))
670 IWL_WARN(mvm,
671 "returned value from ASYNC handlers are ignored\n");
672 iwl_free_rxb(&entry->rxb);
673 list_del(&entry->list);
674 kfree(entry);
675 }
676 mutex_unlock(&mvm->mutex);
677 }
678
679 static inline void iwl_mvm_rx_check_trigger(struct iwl_mvm *mvm,
680 struct iwl_rx_packet *pkt)
681 {
682 struct iwl_fw_dbg_trigger_tlv *trig;
683 struct iwl_fw_dbg_trigger_cmd *cmds_trig;
684 int i;
685
686 if (!iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_FW_NOTIF))
687 return;
688
689 trig = iwl_fw_dbg_get_trigger(mvm->fw, FW_DBG_TRIGGER_FW_NOTIF);
690 cmds_trig = (void *)trig->data;
691
692 if (!iwl_fw_dbg_trigger_check_stop(mvm, NULL, trig))
693 return;
694
695 for (i = 0; i < ARRAY_SIZE(cmds_trig->cmds); i++) {
696 /* don't collect on CMD 0 */
697 if (!cmds_trig->cmds[i].cmd_id)
698 break;
699
700 if (cmds_trig->cmds[i].cmd_id != pkt->hdr.cmd)
701 continue;
702
703 iwl_mvm_fw_dbg_collect_trig(mvm, trig,
704 "CMD 0x%02x received",
705 pkt->hdr.cmd);
706 break;
707 }
708 }
709
710 static int iwl_mvm_rx_dispatch(struct iwl_op_mode *op_mode,
711 struct iwl_rx_cmd_buffer *rxb,
712 struct iwl_device_cmd *cmd)
713 {
714 struct iwl_rx_packet *pkt = rxb_addr(rxb);
715 struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
716 u8 i;
717
718 iwl_mvm_rx_check_trigger(mvm, pkt);
719
720 /*
721 * Do the notification wait before RX handlers so
722 * even if the RX handler consumes the RXB we have
723 * access to it in the notification wait entry.
724 */
725 iwl_notification_wait_notify(&mvm->notif_wait, pkt);
726
727 for (i = 0; i < ARRAY_SIZE(iwl_mvm_rx_handlers); i++) {
728 const struct iwl_rx_handlers *rx_h = &iwl_mvm_rx_handlers[i];
729 struct iwl_async_handler_entry *entry;
730
731 if (rx_h->cmd_id != pkt->hdr.cmd)
732 continue;
733
734 if (!rx_h->async)
735 return rx_h->fn(mvm, rxb, cmd);
736
737 entry = kzalloc(sizeof(*entry), GFP_ATOMIC);
738 /* we can't do much... */
739 if (!entry)
740 return 0;
741
742 entry->rxb._page = rxb_steal_page(rxb);
743 entry->rxb._offset = rxb->_offset;
744 entry->rxb._rx_page_order = rxb->_rx_page_order;
745 entry->fn = rx_h->fn;
746 spin_lock(&mvm->async_handlers_lock);
747 list_add_tail(&entry->list, &mvm->async_handlers_list);
748 spin_unlock(&mvm->async_handlers_lock);
749 schedule_work(&mvm->async_handlers_wk);
750 break;
751 }
752
753 return 0;
754 }
755
756 static void iwl_mvm_stop_sw_queue(struct iwl_op_mode *op_mode, int queue)
757 {
758 struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
759 int mq = mvm->queue_to_mac80211[queue];
760
761 if (WARN_ON_ONCE(mq == IWL_INVALID_MAC80211_QUEUE))
762 return;
763
764 if (atomic_inc_return(&mvm->mac80211_queue_stop_count[mq]) > 1) {
765 IWL_DEBUG_TX_QUEUES(mvm,
766 "queue %d (mac80211 %d) already stopped\n",
767 queue, mq);
768 return;
769 }
770
771 ieee80211_stop_queue(mvm->hw, mq);
772 }
773
774 static void iwl_mvm_wake_sw_queue(struct iwl_op_mode *op_mode, int queue)
775 {
776 struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
777 int mq = mvm->queue_to_mac80211[queue];
778
779 if (WARN_ON_ONCE(mq == IWL_INVALID_MAC80211_QUEUE))
780 return;
781
782 if (atomic_dec_return(&mvm->mac80211_queue_stop_count[mq]) > 0) {
783 IWL_DEBUG_TX_QUEUES(mvm,
784 "queue %d (mac80211 %d) still stopped\n",
785 queue, mq);
786 return;
787 }
788
789 ieee80211_wake_queue(mvm->hw, mq);
790 }
791
792 void iwl_mvm_set_hw_ctkill_state(struct iwl_mvm *mvm, bool state)
793 {
794 if (state)
795 set_bit(IWL_MVM_STATUS_HW_CTKILL, &mvm->status);
796 else
797 clear_bit(IWL_MVM_STATUS_HW_CTKILL, &mvm->status);
798
799 wiphy_rfkill_set_hw_state(mvm->hw->wiphy, iwl_mvm_is_radio_killed(mvm));
800 }
801
802 static bool iwl_mvm_set_hw_rfkill_state(struct iwl_op_mode *op_mode, bool state)
803 {
804 struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
805 bool calibrating = ACCESS_ONCE(mvm->calibrating);
806
807 if (state)
808 set_bit(IWL_MVM_STATUS_HW_RFKILL, &mvm->status);
809 else
810 clear_bit(IWL_MVM_STATUS_HW_RFKILL, &mvm->status);
811
812 wiphy_rfkill_set_hw_state(mvm->hw->wiphy, iwl_mvm_is_radio_killed(mvm));
813
814 /* iwl_run_init_mvm_ucode is waiting for results, abort it */
815 if (calibrating)
816 iwl_abort_notification_waits(&mvm->notif_wait);
817
818 /*
819 * Stop the device if we run OPERATIONAL firmware or if we are in the
820 * middle of the calibrations.
821 */
822 return state && (mvm->cur_ucode != IWL_UCODE_INIT || calibrating);
823 }
824
825 static void iwl_mvm_free_skb(struct iwl_op_mode *op_mode, struct sk_buff *skb)
826 {
827 struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
828 struct ieee80211_tx_info *info;
829
830 info = IEEE80211_SKB_CB(skb);
831 iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]);
832 ieee80211_free_txskb(mvm->hw, skb);
833 }
834
835 struct iwl_mvm_reprobe {
836 struct device *dev;
837 struct work_struct work;
838 };
839
840 static void iwl_mvm_reprobe_wk(struct work_struct *wk)
841 {
842 struct iwl_mvm_reprobe *reprobe;
843
844 reprobe = container_of(wk, struct iwl_mvm_reprobe, work);
845 if (device_reprobe(reprobe->dev))
846 dev_err(reprobe->dev, "reprobe failed!\n");
847 kfree(reprobe);
848 module_put(THIS_MODULE);
849 }
850
851 static void iwl_mvm_fw_error_dump_wk(struct work_struct *work)
852 {
853 struct iwl_mvm *mvm =
854 container_of(work, struct iwl_mvm, fw_dump_wk.work);
855
856 if (iwl_mvm_ref_sync(mvm, IWL_MVM_REF_FW_DBG_COLLECT))
857 return;
858
859 mutex_lock(&mvm->mutex);
860
861 /* stop recording */
862 if (mvm->cfg->device_family == IWL_DEVICE_FAMILY_7000) {
863 iwl_set_bits_prph(mvm->trans, MON_BUFF_SAMPLE_CTL, 0x100);
864 } else {
865 iwl_write_prph(mvm->trans, DBGC_IN_SAMPLE, 0);
866 /* wait before we collect the data till the DBGC stop */
867 udelay(100);
868 }
869
870 iwl_mvm_fw_error_dump(mvm);
871
872 /* start recording again if the firmware is not crashed */
873 WARN_ON_ONCE((!test_bit(STATUS_FW_ERROR, &mvm->trans->status)) &&
874 mvm->fw->dbg_dest_tlv &&
875 iwl_mvm_start_fw_dbg_conf(mvm, mvm->fw_dbg_conf));
876
877 mutex_unlock(&mvm->mutex);
878
879 iwl_mvm_unref(mvm, IWL_MVM_REF_FW_DBG_COLLECT);
880 }
881
882 void iwl_mvm_nic_restart(struct iwl_mvm *mvm, bool fw_error)
883 {
884 iwl_abort_notification_waits(&mvm->notif_wait);
885
886 /*
887 * This is a bit racy, but worst case we tell mac80211 about
888 * a stopped/aborted scan when that was already done which
889 * is not a problem. It is necessary to abort any os scan
890 * here because mac80211 requires having the scan cleared
891 * before restarting.
892 * We'll reset the scan_status to NONE in restart cleanup in
893 * the next start() call from mac80211. If restart isn't called
894 * (no fw restart) scan status will stay busy.
895 */
896 iwl_mvm_report_scan_aborted(mvm);
897
898 /*
899 * If we're restarting already, don't cycle restarts.
900 * If INIT fw asserted, it will likely fail again.
901 * If WoWLAN fw asserted, don't restart either, mac80211
902 * can't recover this since we're already half suspended.
903 */
904 if (!mvm->restart_fw && fw_error) {
905 iwl_mvm_fw_dbg_collect_desc(mvm, &iwl_mvm_dump_desc_assert, 0);
906 } else if (test_and_set_bit(IWL_MVM_STATUS_IN_HW_RESTART,
907 &mvm->status)) {
908 struct iwl_mvm_reprobe *reprobe;
909
910 IWL_ERR(mvm,
911 "Firmware error during reconfiguration - reprobe!\n");
912
913 /*
914 * get a module reference to avoid doing this while unloading
915 * anyway and to avoid scheduling a work with code that's
916 * being removed.
917 */
918 if (!try_module_get(THIS_MODULE)) {
919 IWL_ERR(mvm, "Module is being unloaded - abort\n");
920 return;
921 }
922
923 reprobe = kzalloc(sizeof(*reprobe), GFP_ATOMIC);
924 if (!reprobe) {
925 module_put(THIS_MODULE);
926 return;
927 }
928 reprobe->dev = mvm->trans->dev;
929 INIT_WORK(&reprobe->work, iwl_mvm_reprobe_wk);
930 schedule_work(&reprobe->work);
931 } else if (mvm->cur_ucode == IWL_UCODE_REGULAR) {
932 /* don't let the transport/FW power down */
933 iwl_mvm_ref(mvm, IWL_MVM_REF_UCODE_DOWN);
934
935 if (fw_error && mvm->restart_fw > 0)
936 mvm->restart_fw--;
937 ieee80211_restart_hw(mvm->hw);
938 }
939 }
940
941 static void iwl_mvm_nic_error(struct iwl_op_mode *op_mode)
942 {
943 struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
944
945 iwl_mvm_dump_nic_error_log(mvm);
946
947 iwl_mvm_nic_restart(mvm, true);
948 }
949
950 static void iwl_mvm_cmd_queue_full(struct iwl_op_mode *op_mode)
951 {
952 struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
953
954 WARN_ON(1);
955 iwl_mvm_nic_restart(mvm, true);
956 }
957
958 struct iwl_d0i3_iter_data {
959 struct iwl_mvm *mvm;
960 u8 ap_sta_id;
961 u8 vif_count;
962 u8 offloading_tid;
963 bool disable_offloading;
964 };
965
966 static bool iwl_mvm_disallow_offloading(struct iwl_mvm *mvm,
967 struct ieee80211_vif *vif,
968 struct iwl_d0i3_iter_data *iter_data)
969 {
970 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
971 struct ieee80211_sta *ap_sta;
972 struct iwl_mvm_sta *mvmsta;
973 u32 available_tids = 0;
974 u8 tid;
975
976 if (WARN_ON(vif->type != NL80211_IFTYPE_STATION ||
977 mvmvif->ap_sta_id == IWL_MVM_STATION_COUNT))
978 return false;
979
980 ap_sta = rcu_dereference(mvm->fw_id_to_mac_id[mvmvif->ap_sta_id]);
981 if (IS_ERR_OR_NULL(ap_sta))
982 return false;
983
984 mvmsta = iwl_mvm_sta_from_mac80211(ap_sta);
985 spin_lock_bh(&mvmsta->lock);
986 for (tid = 0; tid < IWL_MAX_TID_COUNT; tid++) {
987 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
988
989 /*
990 * in case of pending tx packets, don't use this tid
991 * for offloading in order to prevent reuse of the same
992 * qos seq counters.
993 */
994 if (iwl_mvm_tid_queued(tid_data))
995 continue;
996
997 if (tid_data->state != IWL_AGG_OFF)
998 continue;
999
1000 available_tids |= BIT(tid);
1001 }
1002 spin_unlock_bh(&mvmsta->lock);
1003
1004 /*
1005 * disallow protocol offloading if we have no available tid
1006 * (with no pending frames and no active aggregation,
1007 * as we don't handle "holes" properly - the scheduler needs the
1008 * frame's seq number and TFD index to match)
1009 */
1010 if (!available_tids)
1011 return true;
1012
1013 /* for simplicity, just use the first available tid */
1014 iter_data->offloading_tid = ffs(available_tids) - 1;
1015 return false;
1016 }
1017
1018 static void iwl_mvm_enter_d0i3_iterator(void *_data, u8 *mac,
1019 struct ieee80211_vif *vif)
1020 {
1021 struct iwl_d0i3_iter_data *data = _data;
1022 struct iwl_mvm *mvm = data->mvm;
1023 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1024 u32 flags = CMD_ASYNC | CMD_HIGH_PRIO | CMD_SEND_IN_IDLE;
1025
1026 IWL_DEBUG_RPM(mvm, "entering D0i3 - vif %pM\n", vif->addr);
1027 if (vif->type != NL80211_IFTYPE_STATION ||
1028 !vif->bss_conf.assoc)
1029 return;
1030
1031 /*
1032 * in case of pending tx packets or active aggregations,
1033 * avoid offloading features in order to prevent reuse of
1034 * the same qos seq counters.
1035 */
1036 if (iwl_mvm_disallow_offloading(mvm, vif, data))
1037 data->disable_offloading = true;
1038
1039 iwl_mvm_update_d0i3_power_mode(mvm, vif, true, flags);
1040 iwl_mvm_send_proto_offload(mvm, vif, data->disable_offloading, flags);
1041
1042 /*
1043 * on init/association, mvm already configures POWER_TABLE_CMD
1044 * and REPLY_MCAST_FILTER_CMD, so currently don't
1045 * reconfigure them (we might want to use different
1046 * params later on, though).
1047 */
1048 data->ap_sta_id = mvmvif->ap_sta_id;
1049 data->vif_count++;
1050 }
1051
1052 static void iwl_mvm_set_wowlan_data(struct iwl_mvm *mvm,
1053 struct iwl_wowlan_config_cmd *cmd,
1054 struct iwl_d0i3_iter_data *iter_data)
1055 {
1056 struct ieee80211_sta *ap_sta;
1057 struct iwl_mvm_sta *mvm_ap_sta;
1058
1059 if (iter_data->ap_sta_id == IWL_MVM_STATION_COUNT)
1060 return;
1061
1062 rcu_read_lock();
1063
1064 ap_sta = rcu_dereference(mvm->fw_id_to_mac_id[iter_data->ap_sta_id]);
1065 if (IS_ERR_OR_NULL(ap_sta))
1066 goto out;
1067
1068 mvm_ap_sta = iwl_mvm_sta_from_mac80211(ap_sta);
1069 cmd->is_11n_connection = ap_sta->ht_cap.ht_supported;
1070 cmd->offloading_tid = iter_data->offloading_tid;
1071
1072 /*
1073 * The d0i3 uCode takes care of the nonqos counters,
1074 * so configure only the qos seq ones.
1075 */
1076 iwl_mvm_set_wowlan_qos_seq(mvm_ap_sta, cmd);
1077 out:
1078 rcu_read_unlock();
1079 }
1080
1081 int iwl_mvm_enter_d0i3(struct iwl_op_mode *op_mode)
1082 {
1083 struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
1084 u32 flags = CMD_ASYNC | CMD_HIGH_PRIO | CMD_SEND_IN_IDLE;
1085 int ret;
1086 struct iwl_d0i3_iter_data d0i3_iter_data = {
1087 .mvm = mvm,
1088 };
1089 struct iwl_wowlan_config_cmd wowlan_config_cmd = {
1090 .wakeup_filter = cpu_to_le32(IWL_WOWLAN_WAKEUP_RX_FRAME |
1091 IWL_WOWLAN_WAKEUP_BEACON_MISS |
1092 IWL_WOWLAN_WAKEUP_LINK_CHANGE |
1093 IWL_WOWLAN_WAKEUP_BCN_FILTERING),
1094 };
1095 struct iwl_d3_manager_config d3_cfg_cmd = {
1096 .min_sleep_time = cpu_to_le32(1000),
1097 .wakeup_flags = cpu_to_le32(IWL_WAKEUP_D3_CONFIG_FW_ERROR),
1098 };
1099
1100 IWL_DEBUG_RPM(mvm, "MVM entering D0i3\n");
1101
1102 /* make sure we have no running tx while configuring the qos */
1103 set_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status);
1104 synchronize_net();
1105
1106 /*
1107 * iwl_mvm_ref_sync takes a reference before checking the flag.
1108 * so by checking there is no held reference we prevent a state
1109 * in which iwl_mvm_ref_sync continues successfully while we
1110 * configure the firmware to enter d0i3
1111 */
1112 if (iwl_mvm_ref_taken(mvm)) {
1113 IWL_DEBUG_RPM(mvm->trans, "abort d0i3 due to taken ref\n");
1114 clear_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status);
1115 wake_up(&mvm->d0i3_exit_waitq);
1116 return 1;
1117 }
1118
1119 ieee80211_iterate_active_interfaces_atomic(mvm->hw,
1120 IEEE80211_IFACE_ITER_NORMAL,
1121 iwl_mvm_enter_d0i3_iterator,
1122 &d0i3_iter_data);
1123 if (d0i3_iter_data.vif_count == 1) {
1124 mvm->d0i3_ap_sta_id = d0i3_iter_data.ap_sta_id;
1125 mvm->d0i3_offloading = !d0i3_iter_data.disable_offloading;
1126 } else {
1127 WARN_ON_ONCE(d0i3_iter_data.vif_count > 1);
1128 mvm->d0i3_ap_sta_id = IWL_MVM_STATION_COUNT;
1129 mvm->d0i3_offloading = false;
1130 }
1131
1132 iwl_mvm_set_wowlan_data(mvm, &wowlan_config_cmd, &d0i3_iter_data);
1133 ret = iwl_mvm_send_cmd_pdu(mvm, WOWLAN_CONFIGURATION, flags,
1134 sizeof(wowlan_config_cmd),
1135 &wowlan_config_cmd);
1136 if (ret)
1137 return ret;
1138
1139 return iwl_mvm_send_cmd_pdu(mvm, D3_CONFIG_CMD,
1140 flags | CMD_MAKE_TRANS_IDLE,
1141 sizeof(d3_cfg_cmd), &d3_cfg_cmd);
1142 }
1143
1144 static void iwl_mvm_exit_d0i3_iterator(void *_data, u8 *mac,
1145 struct ieee80211_vif *vif)
1146 {
1147 struct iwl_mvm *mvm = _data;
1148 u32 flags = CMD_ASYNC | CMD_HIGH_PRIO;
1149
1150 IWL_DEBUG_RPM(mvm, "exiting D0i3 - vif %pM\n", vif->addr);
1151 if (vif->type != NL80211_IFTYPE_STATION ||
1152 !vif->bss_conf.assoc)
1153 return;
1154
1155 iwl_mvm_update_d0i3_power_mode(mvm, vif, false, flags);
1156 }
1157
1158 static void iwl_mvm_d0i3_disconnect_iter(void *data, u8 *mac,
1159 struct ieee80211_vif *vif)
1160 {
1161 struct iwl_mvm *mvm = data;
1162 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1163
1164 if (vif->type == NL80211_IFTYPE_STATION && vif->bss_conf.assoc &&
1165 mvm->d0i3_ap_sta_id == mvmvif->ap_sta_id)
1166 iwl_mvm_connection_loss(mvm, vif, "D0i3");
1167 }
1168
1169 void iwl_mvm_d0i3_enable_tx(struct iwl_mvm *mvm, __le16 *qos_seq)
1170 {
1171 struct ieee80211_sta *sta = NULL;
1172 struct iwl_mvm_sta *mvm_ap_sta;
1173 int i;
1174 bool wake_queues = false;
1175
1176 lockdep_assert_held(&mvm->mutex);
1177
1178 spin_lock_bh(&mvm->d0i3_tx_lock);
1179
1180 if (mvm->d0i3_ap_sta_id == IWL_MVM_STATION_COUNT)
1181 goto out;
1182
1183 IWL_DEBUG_RPM(mvm, "re-enqueue packets\n");
1184
1185 /* get the sta in order to update seq numbers and re-enqueue skbs */
1186 sta = rcu_dereference_protected(
1187 mvm->fw_id_to_mac_id[mvm->d0i3_ap_sta_id],
1188 lockdep_is_held(&mvm->mutex));
1189
1190 if (IS_ERR_OR_NULL(sta)) {
1191 sta = NULL;
1192 goto out;
1193 }
1194
1195 if (mvm->d0i3_offloading && qos_seq) {
1196 /* update qos seq numbers if offloading was enabled */
1197 mvm_ap_sta = iwl_mvm_sta_from_mac80211(sta);
1198 for (i = 0; i < IWL_MAX_TID_COUNT; i++) {
1199 u16 seq = le16_to_cpu(qos_seq[i]);
1200 /* firmware stores last-used one, we store next one */
1201 seq += 0x10;
1202 mvm_ap_sta->tid_data[i].seq_number = seq;
1203 }
1204 }
1205 out:
1206 /* re-enqueue (or drop) all packets */
1207 while (!skb_queue_empty(&mvm->d0i3_tx)) {
1208 struct sk_buff *skb = __skb_dequeue(&mvm->d0i3_tx);
1209
1210 if (!sta || iwl_mvm_tx_skb(mvm, skb, sta))
1211 ieee80211_free_txskb(mvm->hw, skb);
1212
1213 /* if the skb_queue is not empty, we need to wake queues */
1214 wake_queues = true;
1215 }
1216 clear_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status);
1217 wake_up(&mvm->d0i3_exit_waitq);
1218 mvm->d0i3_ap_sta_id = IWL_MVM_STATION_COUNT;
1219 if (wake_queues)
1220 ieee80211_wake_queues(mvm->hw);
1221
1222 spin_unlock_bh(&mvm->d0i3_tx_lock);
1223 }
1224
1225 static void iwl_mvm_d0i3_exit_work(struct work_struct *wk)
1226 {
1227 struct iwl_mvm *mvm = container_of(wk, struct iwl_mvm, d0i3_exit_work);
1228 struct iwl_host_cmd get_status_cmd = {
1229 .id = WOWLAN_GET_STATUSES,
1230 .flags = CMD_HIGH_PRIO | CMD_WANT_SKB,
1231 };
1232 struct iwl_wowlan_status *status;
1233 int ret;
1234 u32 disconnection_reasons, wakeup_reasons;
1235 __le16 *qos_seq = NULL;
1236
1237 mutex_lock(&mvm->mutex);
1238 ret = iwl_mvm_send_cmd(mvm, &get_status_cmd);
1239 if (ret)
1240 goto out;
1241
1242 if (!get_status_cmd.resp_pkt)
1243 goto out;
1244
1245 status = (void *)get_status_cmd.resp_pkt->data;
1246 wakeup_reasons = le32_to_cpu(status->wakeup_reasons);
1247 qos_seq = status->qos_seq_ctr;
1248
1249 IWL_DEBUG_RPM(mvm, "wakeup reasons: 0x%x\n", wakeup_reasons);
1250
1251 disconnection_reasons =
1252 IWL_WOWLAN_WAKEUP_BY_DISCONNECTION_ON_MISSED_BEACON |
1253 IWL_WOWLAN_WAKEUP_BY_DISCONNECTION_ON_DEAUTH;
1254 if (wakeup_reasons & disconnection_reasons)
1255 ieee80211_iterate_active_interfaces(
1256 mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
1257 iwl_mvm_d0i3_disconnect_iter, mvm);
1258 out:
1259 iwl_mvm_d0i3_enable_tx(mvm, qos_seq);
1260
1261 /* qos_seq might point inside resp_pkt, so free it only now */
1262 if (get_status_cmd.resp_pkt)
1263 iwl_free_resp(&get_status_cmd);
1264
1265 /* the FW might have updated the regdomain */
1266 iwl_mvm_update_changed_regdom(mvm);
1267
1268 iwl_mvm_unref(mvm, IWL_MVM_REF_EXIT_WORK);
1269 mutex_unlock(&mvm->mutex);
1270 }
1271
1272 int _iwl_mvm_exit_d0i3(struct iwl_mvm *mvm)
1273 {
1274 u32 flags = CMD_ASYNC | CMD_HIGH_PRIO | CMD_SEND_IN_IDLE |
1275 CMD_WAKE_UP_TRANS;
1276 int ret;
1277
1278 IWL_DEBUG_RPM(mvm, "MVM exiting D0i3\n");
1279
1280 mutex_lock(&mvm->d0i3_suspend_mutex);
1281 if (test_bit(D0I3_DEFER_WAKEUP, &mvm->d0i3_suspend_flags)) {
1282 IWL_DEBUG_RPM(mvm, "Deferring d0i3 exit until resume\n");
1283 __set_bit(D0I3_PENDING_WAKEUP, &mvm->d0i3_suspend_flags);
1284 mutex_unlock(&mvm->d0i3_suspend_mutex);
1285 return 0;
1286 }
1287 mutex_unlock(&mvm->d0i3_suspend_mutex);
1288
1289 ret = iwl_mvm_send_cmd_pdu(mvm, D0I3_END_CMD, flags, 0, NULL);
1290 if (ret)
1291 goto out;
1292
1293 ieee80211_iterate_active_interfaces_atomic(mvm->hw,
1294 IEEE80211_IFACE_ITER_NORMAL,
1295 iwl_mvm_exit_d0i3_iterator,
1296 mvm);
1297 out:
1298 schedule_work(&mvm->d0i3_exit_work);
1299 return ret;
1300 }
1301
1302 int iwl_mvm_exit_d0i3(struct iwl_op_mode *op_mode)
1303 {
1304 struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
1305
1306 iwl_mvm_ref(mvm, IWL_MVM_REF_EXIT_WORK);
1307 return _iwl_mvm_exit_d0i3(mvm);
1308 }
1309
1310 static void iwl_mvm_napi_add(struct iwl_op_mode *op_mode,
1311 struct napi_struct *napi,
1312 struct net_device *napi_dev,
1313 int (*poll)(struct napi_struct *, int),
1314 int weight)
1315 {
1316 struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
1317
1318 ieee80211_napi_add(mvm->hw, napi, napi_dev, poll, weight);
1319 }
1320
1321 static const struct iwl_op_mode_ops iwl_mvm_ops = {
1322 .start = iwl_op_mode_mvm_start,
1323 .stop = iwl_op_mode_mvm_stop,
1324 .rx = iwl_mvm_rx_dispatch,
1325 .queue_full = iwl_mvm_stop_sw_queue,
1326 .queue_not_full = iwl_mvm_wake_sw_queue,
1327 .hw_rf_kill = iwl_mvm_set_hw_rfkill_state,
1328 .free_skb = iwl_mvm_free_skb,
1329 .nic_error = iwl_mvm_nic_error,
1330 .cmd_queue_full = iwl_mvm_cmd_queue_full,
1331 .nic_config = iwl_mvm_nic_config,
1332 .enter_d0i3 = iwl_mvm_enter_d0i3,
1333 .exit_d0i3 = iwl_mvm_exit_d0i3,
1334 .napi_add = iwl_mvm_napi_add,
1335 };
Linux kernel - Deliverables
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